Electrical terminal assembly for drive unit of mining machine

Abstract

The present invention relates to an electrical terminal assembly (26) for a drive unit (12) of a mining machine. The electrical terminal assembly includes a junction box (28) configured to be mounted to the drive unit (12) and connecting elements (30) for communicatively connecting the junction box to a control device of the drive unit (12). The electrical terminal assembly (26) is configured to be interchangeably arranged in at least two different configurations, each of which is associated with a different structural arrangement of the drive unit (12).

Description

Technical Field

[0001] The present invention relates to an electrical terminal assembly for a drive unit of a mining machine, i.e., an underground mining machine, and an arrangement of drive units equipped with such an electrical terminal assembly. Background Technology

[0002] Mining machines, particularly longwall mining machines, are equipped with multiple drive units for actuating or driving operating equipment such as conveyors, cutters, or other driven components, i.e., traction chain drive units. Typically, the drive units employed are designed with modularity to increase their reusability and standardization between and within such mining machines. This modular design of the drive unit may include a high-performance motor, i.e., an electric motor, to which a large gearbox is flanged. Furthermore, the drive unit may include a clutch inserted between the electric motor and the gearbox. The large gearbox and the associated clutch (if present) are used to introduce the high drive power of the electric motor into a drive shaft, such as the drive shaft of the sprocket of the driven equipment.

[0003] In underground mining, a so-called Controlled Start Transmission (CST) drive system with a modular design is known to be used. In this drive system, the gearbox, typically a planetary or bevel gear with a merging clutch for starting the machine, is housed in a housing component, separate from another housing component housing the electric motor. In this drive system, the operating conditions of each gear component are monitored to ensure proper operation of the drive system. For this purpose, the gearbox is equipped with multiple sensors, and the sensor measurements are acquired and preprocessed in an electronic measurement acquisition device before being supplied to the control unit or the drive computer of the drive system. For example, a CST drive system is known from US 2006 / 0119188 A1, in which the electronic measurement acquisition device and control unit are housed in a housing disposed on the outer surface of the motor housing.

[0004] The modular design of the CST drive system allows it to adapt to different installation conditions, thus providing a degree of configurability. For example, known CST drive systems allow for different structural arrangements of the motor and gearbox relative to each other.

[0005] However, the installation and removal of such drive unit arrangements can be time-consuming and costly during maintenance or when they need to be reconfigured—that is, if their structural layout needs to be adapted or rearranged. Specifically, the installation and removal of electrical terminals, i.e., electrical wiring, required for proper operational status detection and control may require a high workload and skilled personnel. Summary of the Invention

[0006] Starting with existing technology, the goal is to provide an improved electrical terminal assembly for the drive unit, which particularly facilitates the installation and removal of the drive unit and simultaneously contributes to its modular design. Furthermore, the goal is to provide a drive unit arrangement equipped with such an electrical terminal assembly.

[0007] These objectives are achieved by the arrangement of the electrical terminal assembly and drive unit according to the independent claims. Preferred embodiments are set forth in this specification, the accompanying drawings, and the dependent claims.

[0008] Therefore, an electrical terminal assembly for a drive unit of a mining machine is provided. The electrical terminal assembly includes a junction box configured to be mounted to the drive unit and connection elements for communicatively connecting the junction box to a control device of the drive unit, wherein the electrical terminal assembly is configured to be interchangeably arranged in at least two different configurations, each of which is associated with a different structural arrangement of the drive unit.

[0009] In addition, a drive unit arrangement is provided, which includes a drive unit and an electrical terminal assembly as described above.

[0010] Since the drive unit arrangement is equipped with the aforementioned electrical terminal assembly, the technical features described in this disclosure in conjunction with the electrical terminal assembly can also be related to and applied to the proposed drive unit arrangement, and vice versa. Attached Figure Description

[0011] This disclosure will be more readily understood by referring to the following detailed description taken in conjunction with the accompanying drawings, in which:

[0012] Figure 1 A perspective view schematically showing a drive unit arrangement according to a first embodiment is shown, the drive unit arrangement being equipped with a drive unit of a first structural arrangement and an electrical terminal assembly arranged in a first configuration;

[0013] Figure 2 schematically shown Figure 1 The perspective view depicting the arrangement of the drive unit is shown in the figure, with the protective cover of the electrical terminal assembly removed from the figure;

[0014] Figure 3 schematically shown in Figure 1 and Figure 2 A perspective view of the junction box of the electrical terminal assembly used in the drive unit arrangement depicted therein and the electrical connections thereto;

[0015] Figure 4 schematically shown in Figure 1 and Figure 2 A perspective view of the protective cover of the electrical terminal assembly used in the drive unit arrangement depicted in the figure;

[0016] Figures 5 to 8schematically shown Figure 1 The drive unit arrangement depicted herein, wherein the drive units are configured in a second structural arrangement and the electrical terminal assemblies are arranged in a second configuration;

[0017] Figures 9 to 12 A perspective view schematically illustrating a drive unit arrangement according to a second embodiment is shown, the drive unit arrangement being equipped with drive units of a first structural arrangement and electrical terminal assemblies arranged in a first configuration; and

[0018] Figures 13 to 16 schematically shown Figure 9 The drive unit arrangement depicted herein, wherein the drive units are configured in a second structural arrangement and the electrical terminal assemblies are arranged in a second configuration;

[0019] Figure 17 A perspective view schematically showing the internal structure of the gearbox according to a first configuration installed in the drive unit;

[0020] Figure 18 A longitudinal section of the gearbox according to the second configuration is schematically shown;

[0021] Figure 19 A longitudinal section of the gearbox according to the third configuration is schematically shown;

[0022] Figure 20 and Figure 21 A perspective view schematically showing the connecting flange of the drive unit used to connect the motor unit to the gearbox structure;

[0023] Figure 22 schematically shown Figure 20 and Figure 21 The front view of the motor unit side end of the connecting flange depicted in the figure; and

[0024] Figure 23 schematically shown Figures 20 to 22 The front view of the gearbox side end of the connecting flange depicted in the figure. Detailed Implementation

[0025] The invention will be explained in more detail below with reference to the accompanying drawings. In the drawings, the same elements are indicated by the same reference numerals, and repeated descriptions may be omitted to avoid repetition.

[0026] Figure 1A drive unit arrangement 10 for use in a mining machine (not shown), particularly an underground mining machine, is depicted. Specifically, the drive unit arrangement 10 is configured to drive the operating equipment of the mining machine, such as a conveyor, cutter, or any other electrically driven component. For example, the drive unit arrangement 10 may be configured to actuate the sprocket of a traction chain. Furthermore, the mining machine may be equipped with multiple such drive unit arrangements 10 to increase reusability and thereby reduce the cost of such components.

[0027] The illustrated drive unit arrangement 10 is equipped with a drive unit 12, which includes a motor unit 14 to which a gearbox 16 is flanged. Specifically, the motor unit 14 includes a motor 18 housed in a cylindrical housing, and a clutch 20 is flanged to the motor such that the clutch 20 is inserted between the motor 18 and the gearbox 16. In the illustrated arrangement, the clutch 20 is configured to connect the output shaft of the motor 18 to the input shaft of the gearbox 16 in a torque transmission manner. In an alternative embodiment of the drive unit arrangement 10, the clutch 20 may be omitted.

[0028] The gearbox 16 can be configured as a planetary gear or a bevel gear. The output shaft 22 of the gearbox 16 is connected to the drive shaft (not shown) of the operating device to be driven, so that the torque generated by the motor 14 is transmitted to the drive shaft of the operating device, thereby rotatably actuating the drive shaft of the operating device.

[0029] In the illustrated configuration of drive unit 12, the output shaft of motor 18 is arranged parallel to the output shaft 22 of gearbox 16. In other words, both the output shaft of motor 18 and the output shaft 22 of gearbox 16 are arranged parallel to the longitudinal axis X of drive unit arrangement 10. This arrangement of drive unit 12 may be referred to as "P arrangement".

[0030] The drive unit 12 may also be equipped with one or more supply units, which include at least one of, for example, a cooling oil pump, a high-pressure pump, a heat exchanger, a hydraulic controller, a filter, etc.

[0031] In addition, a main terminal box 24 is provided, which is mounted on the outer surface of the motor unit 14, i.e., the housing, and particularly houses the control device for the drive unit 12. The control device is configured to control the operation of the drive unit 12, particularly by selectively supplying electrical energy to the motor 18 and at least one supply unit.

[0032] To ensure the correct operation of the drive unit 12, the control device is configured to monitor the operating conditions of the drive unit's components, particularly the operating conditions of the individual gear components of the gearbox 16. For this purpose, at least three sensors are provided, each configured to detect or measure the operation of the drive unit's components, thereby acquiring data indicating their operating state. Based on the acquired data, the control device is configured to monitor and control the operation of the drive unit 12.

[0033] To transmit acquired data from different sensors to a control unit housed in the main terminal box 24, the drive unit arrangement 10 also includes an electrical terminal assembly 26. In other words, the electrical terminal assembly 26 is configured to communicatively connect the control unit located in the main terminal box 24 to different sensors located in the gearbox 16, so that data and information can be exchanged between them.

[0034] The electrical terminal assembly 26 is releasably or detachably mounted to the outer surface of the drive unit 12, i.e., the housing. In the context of this disclosure, the term "releasably or detachably mounted" means that a component can be released or removed from another component without damaging the component itself or the other component to which it is mounted, such that it can be disassembled and subsequently reassembled without replacing or exchanging individual components.

[0035] Specifically, the electrical terminal assembly 26 includes a junction box 28, which is detachably mounted to the outer surface of the gearbox 16, i.e., the housing or cover, such as... Figure 2 This is understandable. Generally, according to this disclosure, the term "junction box" refers to a component that forms part of a wiring system or circuit, specifically providing a housing and thus providing protection for electrical and electronic components, for example, used for electrical connections. Junction box 28 houses an electronic measurement acquisition device, also known as a data acquisition device, which receives measurement data acquired by various sensors. Specifically, the data acquisition device is configured to perform preprocessing on the received measurement data in order to bundle and merge the received measurement data, particularly in a predetermined form, after which the measurement data is forwarded to a control device.

[0036] To transmit preprocessed data to the control device, a connecting element 30 is provided, which communicatively connects the main terminal box 24 (i.e., the control device) and electrically connects it to the junction box 28 (i.e., the data acquisition device). The connecting element 30 is provided in the form of a cable, specifically a multi-pole cable, such as a 37-pole cable, equipped with plug connectors 32 and 34 at opposite ends for detachably connecting the connecting element 30 to both the connection socket 35 mounted on the main terminal box 24 and the junction box 28. The connection socket 35 is located on the control device side of the electrical terminal assembly 26.

[0037] Specifically, such as from Figure 3It is understood that the first plug connector 32 of the connecting element 30 is configured to be detachably connected to complementary electrical interfaces 36, 38 at the junction box 28, particularly in the form of a plug connector or socket, each of which is configured to be detachably connected to the connecting element 30. The junction box 28 is provided with a first control port 36 and a second control port 38, which are located on opposite sides of the junction box 28 and designed to be complementary to the first plug connector 32. With this arrangement, the first plug connector 32 can be selectively connected to either the first control port 36 or the second control port 38 without affecting the operation of the control device. In other words, it makes no difference whether the first plug connector 32 is connected to the first control port 36 or the second control port 38 for the connection between the junction box 28 and the main terminal box 24. Therefore, the engagement portion of the first plug connector 32 is redundantly provided at the junction box 28. In the context of this disclosure, the term "control port" refers to a port configured to communicatively connect the junction box to the control device.

[0038] If possible Figure 2 It is understood that the second plug connector 34 of the connecting element 30 is configured to be detachably coupled to complementary electrical interfaces 36, 38 at the connecting socket 35, specifically in the form of a plug connector or socket. The connecting socket 35 is equipped with a first connector 40 and a second connector 42, which are designed to complement the second plug connector 34. With this arrangement, the second plug connector 34 can be selectively coupled to either the first connector 40 or the second connector 42 without affecting the operation of the control device. In other words, it makes no difference whether the second plug connector 34 is connected to the first connector 40 or the second connector 42 for the connection between the junction box 28 and the main terminal box 24. Therefore, a redundant engagement portion for the second plug connector 34 is provided.

[0039] In the gearbox 16, two sensors are provided, which are communicatively connected via a first sensor line 44 and a second sensor line 46, respectively, i.e., electrically connected to the junction box 28, as can be seen from... Figure 2 As understood in the text. The first sensor line 44 and the second sensor line 46 are configured to transmit measurement data acquired by the respective sensors to a data acquisition device housed in the junction box 28. Specifically, the first sensor line 44 and the second sensor line 46 are provided in the form of a cable.

[0040] If possible Figure 3As understood, in order to connect the first sensor line 44 to the data acquisition device, the junction box 28 is provided with redundantly configured first sensor port 48 and second sensor port 50. In other words, the first sensor line 44 can be selectively connected to either the first sensor port 48 or the second sensor port 50. For the function of the data acquisition device, it makes no difference whether the first sensor line 44 is connected to the first sensor port 48 or the second sensor port 50. Furthermore, the first sensor port 48 and the second sensor port 50 are located on opposite sides of the junction box 28.

[0041] Therefore, in order to connect the second sensor line 46 to the data acquisition device, the junction box 28 is provided with redundantly configured third sensor port 52 and fourth sensor port 54. In other words, the second sensor line 46 can be selectively connected to either the third sensor port 52 or the fourth sensor port 54. This has no impact on the functionality of the data acquisition device.

[0042] Junction box 28 also houses a third sensor configured to measure the operating conditions of gearbox 16. For this purpose, junction box 28 is configured to connect to third sensor line 56 and fourth sensor line 58 via fifth sensor port 60 and sixth sensor port 62, respectively. In the illustrated configuration, third sensor line 56 and fourth sensor line 58 are provided as hydraulic lines for fluidly connecting the third sensor to gearbox 16.

[0043] The proposed configuration of the electrical terminal assembly 26 provides a predetermined and standardized interface for connecting the electrical terminal assembly 26 to the drive unit 24. In this way, connections between components can be repeatedly established and released in a simple and labor-saving manner, thereby facilitating the installation and removal of the electrical terminal assembly 26. Furthermore, the configurability of the electrical terminal assembly 26 is increased by redundantly providing engagements, i.e., ports and connectors, at the junction box 28 and connector socket 35.

[0044] In addition, such as from Figure 1 and Figure 4 It is understood that the electrical terminal assembly 26 includes a protective cover 64 configured to prevent damage to the electrical terminal assembly 26 during operation of the mining machine, i.e., to protect the electrical terminals 26 from falling material. The protective cover 64 includes a plurality of interconnected shielding plates 66a-e, which are configured to be interchangeable and variably connected to each other.

[0045] The drive unit 12 shown has a modular design, which allows the structural arrangement of the drive unit 12 to be adapted to different installation conditions or applications. Therefore, the drive unit 12 can form a so-called CST drive system.

[0046] With this configuration, the drive unit 12 is arranged in at least two different structural arrangements. Furthermore, the drive unit 12 is configured to switch or modify from one of the at least two structural arrangements to another, and vice versa. In this way, the drive unit 12 can contribute to the configurability of the mining machine, for example, enabling the mining machine to be reconfigured during use.

[0047] In the context of this disclosure, the term "structural arrangement of drive unit 12" specifically refers to the relative arrangement of components of the drive unit, namely, the arrangement of motor unit 14, gearbox 16 and main terminal box 24 relative to each other.

[0048] Figure 1 and Figure 2 The first structural arrangement of the drive unit 12 is shown, wherein the main terminal box 24 is arranged on the left side of the motor unit 14 when viewed from the direction from the motor unit 14 toward the gearbox 16. In contrast, Figure 5 and Figure 6 It shows Figure 1 and 2 The second structural arrangement of the drive unit 12 depicted in the diagram shows that, when viewed from the direction from the motor unit 14 towards the gearbox 16, the main terminal box 24 is disposed on the top side of the motor unit 14. In other words, the position of the motor unit 14 relative to the gearbox 16 varies between different structural arrangements. Specifically, in Figure 5 and Figure 6 In the second structural arrangement depicted, the motor unit 14 and the main terminal box 24 are located in... Figure 1 and Figure 2 The positions in the first structural arrangement depicted are rotated or shifted by approximately 90° around the longitudinal axis X of the drive unit arrangement 10.

[0049] Similar to the drive unit 12, the electrical terminal assembly 26 also features a modular design, enabling its arrangement to adapt to different intended structural arrangements of the drive unit 12. To this end, the electrical terminal assembly 26 is configured to be convertibly arranged in at least two different configurations, each associated with a different structural arrangement of the drive unit 12. In the context of this disclosure, the term "configured to be convertibly arranged" means that the electrical terminal assembly 26 can be releasably and selectively arranged in one of at least two different configurations, and can be releasably converted from one of the two different configurations to the other, and vice versa. In other words, once the electrical terminal assembly 26 is arranged in a first configuration, it can be disassembled and reassembled into the same or a different configuration. In this way, the proposed electrical terminal assembly 26 can have a modular and flexible design compatible with different drive units or their different structural arrangements.

[0050] Furthermore, in the context of this disclosure, the term "configuration of electrical terminal assembly" refers to the relative arrangement of components of the electrical terminal assembly, particularly when the electrical terminal assembly 26 is mounted to the drive unit 12. Specifically, the configuration of the electrical terminal assembly 26 may refer to the relative arrangement between the junction box 28, the electrical connection 30, the connection socket 35, and the sensor lines 44, 46, 56, 58.

[0051] As explained above, each of at least two different configurations of the electrical terminal assembly 26 is associated with one of the different structural arrangements of the drive unit 12. In other words, when the drive unit 12 is arranged in the first structural arrangement, the electrical terminal assembly 26 mounted thereon is configured in the first configuration, such as... Figures 1 to 4 As depicted in the diagram. Therefore, when the drive unit 12 is arranged in the second structural arrangement, the electrical terminal assembly 26 is mounted to the drive unit 12, such that it is arranged in its second configuration, as shown in the diagram. Figures 5 to 8 As depicted in the text.

[0052] More specifically, when arranged as Figures 1 to 3 In the first configuration depicted, the electrical terminal assembly 26 is arranged such that the first plug connector 32 is connected to the first control port 36 of the junction box 28, and the second plug connector 34 of the connecting element 30 is connected to the first connector 40 of the connecting socket 35. In contrast, when arranged as... Figures 5 to 7 In the second configuration depicted, the electrical terminal assembly 26 is configured such that the first plug connector 32 is connected to the second control port 38 of the junction box 28, and the second plug connector 34 of the connecting element 30 is connected to the first connector 40 of the connecting socket 35.

[0053] Furthermore, the electrical terminal assembly 26 can be configured in a third arrangement, wherein, compared to the first or second arrangement, at least one of the first sensor line 44 and the second sensor line 46 is connected to another of the redundantly provided sensor ports 50, 54 of the junction box 28. This third arrangement of the electrical terminal assembly 26 can be associated with the structural arrangement of the drive unit 12, wherein the main terminal box 24 is arranged on the right side of the motor unit 14 when viewed along the longitudinal axis X. In this third arrangement, the connecting element 30, i.e., its first plug connector 32, can be connected to the first control port 36.

[0054] Similar to junction box 28, protective cover 64 is also configured to be interchangeably arranged in different configurations, such as from... Figure 4 and Figure 8 Yes, I understand. Specifically, the protective cover 64 includes a plurality of interconnected shielding plates 66a-e, which can be interchangeably and variably connected to each other. To form different configurations of the protective cover 64, the individual shielding plates 66a-e can be arranged variably relative to each other.

[0055] In the arrangement of the protective cover 64 shown, five shielding plates 66a-e are provided, which can be variably connected to each other. For example, when observing more closely the first shielding plate 66a, which forms the large transverse shielding plate of the protective cover 64, one can recognize its arrangement within the protective cover 64. Figure 4 The first configuration and Figure 8 The second configuration described in the text differs. More specifically, when arranged in the second configuration, it differs from that in... Figure 4 Compared to the arrangement within the first configuration depicted, the first shielding plate 66a is rotated approximately 90° about the longitudinal axis X and approximately 180° about the transverse axis Y. In other words, in order to convert the protective cover 64 from its first configuration to its second configuration and vice versa, the individual shielding plates 66a-e are designed such that they can be rearranged relative to each other.

[0056] To enable the protective cover 64 to be arranged and converted into different configurations, the individual shielding plates 66a-e are provided with multiple structural interfaces 68, 70 for mounting the shielding plates 66a-e to each other. Specifically, these structural interfaces of the individual shielding plates 66a-e are designed such that when the protective cover 64 is arranged in the first configuration, the first portion 68 of the structural interface connects to the adjacent shielding plate, wherein the second portion 70 of these structural interfaces does not facilitate structural connection with other shielding plates 66. However, when the protective cover 64 is arranged in the second configuration, the second portion 70 of the structural interface is mounted to the adjacent shielding plate 66, wherein the first portion 68 of the structural interface does not facilitate structural connection with other shielding plates 66.

[0057] In other words, at least one shielding plate 66a-e includes at least one first structural interface 68 and at least one second structural interface 70 that can be disposed at opposite end sections of the shielding plate 60. In a first configuration of the electrical terminal assembly 26, at least one first structural interface 68 is detachably mounted to adjacent shielding plates 66a-e, and at least one second structural interface 70 does not contribute to the structural connection between the shielding plates 66a-e, such as from... Figure 4 It is understood that in the second configuration of the electrical terminal assembly 26, at least one second structural interface 70 is detachably mounted to adjacent shielding plates 66a-e, and at least one first structural interface 68 does not contribute to the structural connection between the shielding plates 66a-e, such as from... Figure 8 It is understood that in this configuration, at least a portion of the shielding plate 66 has a symmetrical design, such as an axially symmetrical design.

[0058] By providing different structural interfaces 68 and 70 that are only provided for specific configurations of the electrical terminal assembly 26, a degree of configurability can be given to the protective cover 64, thereby facilitating the modular and flexible design of the electrical terminal assembly 26.

[0059] The proposed arrangement allows the electrical terminal assembly 26 to be arranged in different configurations without swapping or replacing its individual components.

[0060] Figures 9 to 16 A second embodiment of the drive unit assembly 10 is shown, wherein the structure and composition of both the drive unit 12 and the electrical terminal assembly 16 are the same as those of the drive unit assembly 10. Figures 1 to 8 The embodiments described herein differ from those in the original text.

[0061] Specifically, the difference in the structure of the drive unit 12 is that the output shaft of the motor 18 is arranged orthogonally to the output shaft 22 of the gearbox 16. In other words, the output shaft of the motor 18 is arranged in the direction of the longitudinal axis X, and the output shaft 22 of the gearbox 16 is arranged in the direction of the transverse axis Y of the drive unit arrangement 10. This arrangement of the drive unit 12 can be referred to as the "KP arrangement".

[0062] Figures 9 to 12 A first structural arrangement of the drive unit 12 is shown, wherein when viewed in the direction of the longitudinal axis X, the output shaft of the gearbox 16 points to the left, i.e., in the direction of the transverse axis Y of the drive unit arrangement 10. Furthermore, in this structural arrangement, when viewed in the direction of the longitudinal axis X, the main terminal box 24 is arranged on the top side of the drive unit arrangement 10.

[0063] Figures 13 to 16 A second structural arrangement of the drive unit 12 is shown, wherein when viewed along the longitudinal axis X, the output shaft of the gearbox 16 points to the right, i.e., in the opposite direction to the transverse axis Y. Furthermore, when viewed along the longitudinal axis X, the main terminal box 24 is arranged on the left side of the drive unit arrangement 10.

[0064] The electrical terminal assembly 26 includes a first junction box 28a and a second junction box 28b, each of which is respectively mounted to the outer surface of the gearbox 16 and communicatively connected to a control device housed in the main terminal box 24 via connecting elements 30a and 30b.

[0065] also, Figures 9 to 12 A first configuration of the electrical terminal assembly 26 is shown, wherein, when viewed in the direction of the longitudinal axis X, a first junction box 28a is disposed on the right side of the drive unit arrangement 10, and a second junction box 28b is disposed on its front surface. For this purpose, Figures 13 to 16 A second configuration of the electrical terminal assembly 26 is shown, wherein the first junction box 28a is disposed on the left side of the drive unit arrangement 10 when viewed along the longitudinal axis X. Furthermore, in the second configuration, the second junction box 28b is disposed on the front surface of the drive unit arrangement 10, but rotated approximately 180° about the longitudinal axis X compared to the first configuration.

[0066] The first junction box 28a includes a first control port 36a and a second control port 38a arranged on opposite sides. In the first configuration, as can be seen from... Figures 9 to 11 It is understood that the first plug connector 32a of the first connecting element 30a is connected to the first control port 36a. In the second configuration, such as from... Figures 13 to 15 It is understood that the first plug connector 32a of the first connecting element 30a is connected to the second control port 38a of the first junction box 28a.

[0067] The second junction box 28b is connected to the second connecting element 30b via the first control port 36b. This connection is... Figure 11 and Figure 15 The first and second configurations described herein are established in both.

[0068] Furthermore, the second junction box 28b includes a first sensor port 48 and a second sensor port 50, each configured to be connected to a sensor line 44, i.e., provided in the form of a cable, for communicatingly connecting the first sensor disposed in the gearbox 16 to the second junction box 28b. Additionally, a fifth sensor port 60 and a sixth sensor port 62 are disposed at the second junction box 28b, each configured to be connected to another sensor line 56, i.e., a hydraulic line, for fluidly communicating the second sensor housed in the second junction box 28b to the gearbox 16.

[0069] In the first configuration, such as from Figures 9 to 11 It is understood that sensor wire 44 is connected to the first sensor port 48, and another sensor wire 56 is connected to the fifth sensor port 60. However, in Figures 13 to 15 In the second configuration depicted, sensor line 44 is connected to the second sensor port 50, and another sensor line 56 is connected to the sixth sensor port 62.

[0070] In the following text, see references Figure 17 The gearbox 16 is described in further detail. The figure schematically illustrates the internal structure of the gearbox 16 according to a first configuration. For overview purposes, Figure 17 Only a portion of the gearbox components is shown; other parts, such as the housing of gearbox 16 and planetary gears, are omitted from the illustration. Figure 17 In the diagram, gearbox 16 is shown in its installed state, where gearbox 16 is installed together with drive unit 12 in the mining machine.

[0071] As described above, the gearbox 16 shown is installed and used in a drive unit 12 configured as a P-type drive unit, but it can also be configured as a KP-type drive unit. This drive unit 12 also includes a motor unit 14 with a motor 18, which is provided as a synchronous machine powered by an inverter equipped with permanent magnets. Specifically, the motor can be configured such that at its nominal operating point, it operates at less than 1400 rpm, 1300 rpm, or 1000 rpm, for example, 1000 rpm to 200 rpm, 400 rpm to 200 rpm, or 350 rpm to 250 rpm, particularly around 300 rpm.

[0072] Gearbox 16 includes an input shaft 72 to which an actuating torque generated by motor 18 is applied. Gearbox 16 is configured to provide speed and torque conversion from its actuating input shaft 72 to its output shaft. Specifically, gearbox 16 is designed to provide a gear ratio between 3 and 15. For this purpose, gearbox 16 is arranged in the form of a single-stage planetary gear, wherein the input shaft 72 is fixed to a sun gear and the output shaft is fixed to a planetary gear carrier.

[0073] If possible Figure 17 It is understood that the input shaft 72 of the gearbox 16 is connected in the first bearing 74 and the second bearing 76 so as to be rotatably mounted to the housing of the gearbox 16. With this arrangement, the input shaft 72 can be rotatably actuated about its longitudinal axis 78.

[0074] The housing (not shown) of gearbox 16 houses the moving parts of the gearbox, namely, the planetary gears. Furthermore, the housing defines a lubricant reservoir, also called a lubricant collector, in which a lubricant, such as oil, is received. On the one hand, the lubricant is used to reduce friction between the moving parts of gearbox 16; on the other hand, it is used to effectively dissipate heat from gearbox 16, i.e., its moving parts. For this purpose, gearbox 16 is configured such that during its operation, i.e., when rotating input shaft 72, the moving parts, such as input shaft 72, planetary gears, ring gears, etc., are at least partially immersed in and guided by the lubricant received in the lubricant reservoir. Specifically, the lubricant reservoir is configured such that input shaft 72 is at least partially immersed in or positioned in the lubricant received in the lubricant reservoir. For this purpose, gearbox 16 is configured such that, in its installed or operating state, the longitudinal axis 78 of the input shaft 72 around which the rotary actuation gearbox is located is arranged substantially parallel to and near the surface area of ​​the lubricant received in the lubricant reservoir.

[0075] If possible Figure 17It is understood that the gearbox 16 also includes a paddle element 80 attached to the input shaft 72. In the context of this disclosure, the term "paddle element" refers, for example, to a paddle-shaped component of the gearbox designed and configured to actuate lubricant received in the housing of the gearbox 16, thereby causing its movement. Such a paddle-shaped component typically has an effective surface for actuating the lubricant. The effective surface may be designed to guide the lubricant through in a direction substantially perpendicular to its surface normal.

[0076] Therefore, the paddle element 80 is configured to dispose of lubricant received within the housing of the gearbox 16 during movement when the input shaft 72 is actuated. For this purpose, the gearbox 16 is arranged such that during operation of the gearbox 16, i.e., when the input shaft 72 is rotated, the paddle element 80 is configured to be at least partially immersed in the lubricant received in the lubricant reservoir. In other words, when the input shaft 72 is rotated, the paddle element 80 can be actuated such that at least a portion of it is guided through the lubricant received in the lubricant reservoir, thereby inducing movement, i.e., circulation, of the lubricant received in the lubricant reservoir.

[0077] If possible Figure 17 It is understood that the propeller element 80 is provided in the form of a propeller wheel, which is arranged circumferentially and coaxially between a first bearing 74 and a second bearing 76 around the outer surface of the input shaft 22. In this configuration, the propeller element 80 has an annular element 82 around which a plurality of blades 84, also referred to as propellers, are arranged. Each of the plurality of blades 84 is provided in the form of a prism having a trapezoidal cross-sectional profile. Each of the two leading surfaces of the blade 84, at least one of which constitutes an effective surface, extends substantially in a plane traversed by the longitudinal axis 78 and the radial axis of the drive shaft 72.

[0078] Furthermore, the propeller element 80 is formed as a plurality of parts that can be releasably fastened to each other. Specifically, the annular element 82 is provided with two joints 86 arranged on opposite sides of the annular element 82 for releasably connecting two parts or halves of the propeller element 80. Each of the two joints 86 is formed by two connecting pins received in opposite end sections of the two parts of the propeller element 80.

[0079] Furthermore, the gearbox 16 is equipped with a lubricant cooling system 88 for cooling the lubricant received in the gearbox 16 by dissipating heat from the lubricant to a cooling medium. The lubricant cooling system 88 includes a first lubricant cooling unit 90 and a second lubricant cooling unit 92, which are arranged on opposite sides within the housing of the gearbox 16. Specifically, the first lubricant cooling unit 90 is arranged in the upper or top region of the housing, and the second lubricant cooling unit 92 is arranged in the lower or bottom region of the housing. Thus, the first lubricant cooling unit 90 is arranged outside the lubricant reservoir within the housing, while the second lubricant cooling unit 92 is arranged inside the lubricant reservoir, thereby being immersed in the lubricant.

[0080] Each of the first lubricant cooling unit 90 and the second lubricant cooling unit 92 is provided with a heat exchanger 94 through which the cooling medium, i.e., cooling water, is guided. The heat exchanger 94 is provided in the form of a spiral cooling tube having a supply opening and a discharge opening for the cooling medium, which are connected to a cooling medium manifold 96 via a cooling medium supply line 98 and a discharge line 100.

[0081] Furthermore, the first lubricant cooling unit 90 and the second lubricant cooling unit 92 are equipped with a spraying unit 102 configured to spray lubricant onto an associated heat exchanger 94. The spraying unit 102 includes a tubular spraying element 104 extending parallel to the associated heat exchanger 94 and having a plurality of discharge openings facing the associated heat exchanger 94. (As can be seen from...) Figure 17 It is understood that the injection element 104 is arranged next to and near the associated heat exchanger 94.

[0082] Furthermore, the injection unit 102 of each of the first lubricant cooling unit 90 and the second lubricant cooling unit 92 is connected via a lubricant supply line 108 to a lubricant pump 106, also referred to hereinafter as the "pump," to supply lubricant received in a lubricant reservoir to the injection element 104. The pump 106 is driven or actuated by the rotational movement of the drive shaft 72. For this purpose, the pump 106 includes an idler wheel 109, which is designed to complement and engage with a pump drive gear 110 arranged circumferentially around the input shaft 72.

[0083] Before being supplied to the injection element 104, the lubricant delivered by the pump 106 is first guided through a distribution section 112, which distributes the lubricant delivered by the pump 106 to different components of the gearbox 16. In this way, the lubricant delivered by the pump 106 is also supplied in particular to a second bearing 76, which is fluidly connected to the distribution section 112.

[0084] To collect the lubricant to be directed to pump 106, a suction member 114 is provided, to which pump 106 is connected via a lubricant collection line 116. The suction member 114 is configured such that it is at least partially immersed in the lubricant received in a lubricant reservoir. Thus, at least one suction opening is positioned in the lubricant reservoir to collect the lubricant and direct it toward pump 106.

[0085] Furthermore, the suction member 114 is configured to be arranged in at least two different positions relative to the housing. Specifically, the suction member 114 is pivotally mounted to the housing about a connector extending substantially perpendicular to the longitudinal axis 78 of the input shaft 72. In this way, the lubricant cooling system 88 can be adapted to different mounting conditions of the gearbox 16 in the drive unit 12, thereby providing a degree of configurability. For example, if the gearbox 12 is positioned in different mounting positions, where its position relative to the housing is different... Figure 17 If the described situation is shifted about 180° around the longitudinal axis 78, the suction element 114 can rotate about 180° around the connector, so that the suction element 114 points to the bottom of the gearbox again, thereby ensuring that the suction element 114 is immersed in the lubricant reservoir.

[0086] To ensure proper positioning of the suction component 114 within the gearbox 16, the housing is provided with a releasable cap 118 and a cover element 120, to which the suction component 114, together with the connector, is fastened. This configuration exposes the suction component 114 to the operator via the cap 118 or cover element 120, facilitating proper positioning of the suction component 114 during assembly or maintenance.

[0087] In the following text, see references Figure 18 and Figure 19 The disclosure discloses an additional configuration of the gearbox 16, providing another aspect of this disclosure. It should be noted that reference... Figure 17 The features disclosed in the configuration of the gearbox 16 depicted herein can be combined with features of other configurations of the reference gearbox 16 described below. In other words, Figure 18 and Figure 19 The gearbox 16 depicted may be equipped with a propeller element 80 and a lubricant cooling system 88 as disclosed above.

[0088] Figure 18 A gearbox 16 in the form of a single-stage planetary gear is shown. The gearbox 16 is installed and used in a drive unit 12 provided as a P-arranged drive unit, for example, as... Figure 1 and Figure 5 As depicted in the text. In this arrangement, as can be seen from... Figure 18 It is understood that the input shaft 72 and output shaft 22 of gearbox 16 are parallel, and in particular, coaxially aligned. This gearbox arrangement can also be referred to as an in-line planetary gearbox.

[0089] The drive unit 12 includes a gearbox 16, which in turn includes a motor unit 14 with an electric motor 18 connected to the input shaft 72 of the gearbox 16 in a torque-transmission manner to rotatably actuate the input shaft 72. In other words, the actuating torque generated by the motor unit 14 is introduced into the gearbox 16 via the input shaft 72. For this purpose, the drive shaft of the motor 18 is coupled, for example, directly to the input shaft 72 of the gearbox 16 in a form-fit and / or force-fit manner.

[0090] Gearbox 16 is designed to provide a gear ratio between 3 and 15. For this purpose, gearbox 16 has a planetary gear assembly 122 that interconnects the input shaft 72 and the output shaft 22 of gearbox 16 in a torque transmission manner. Thus, the input torque applied to the input shaft 72 is converted into an output torque acting on the output shaft 22. The output torque can be 3 to 15 times larger than the input torque. Therefore, during operation of gearbox 16, the rotational speed of the input shaft 72 is 3 to 15 times larger than the rotational speed of the output shaft 22.

[0091] The planetary gear assembly 122 includes a plurality of planetary gears 124, which are carried by a planetary gear carrier 126 and guided between the sun gear 128 and the ring gear 130. In the illustrated configuration, the sun gear 128, planetary gears 124, and planetary gear carrier 126 constitute moving parts housed within a housing 132 of the gearbox 16. In other words, during operation of the gearbox 16, these parts rotate relative to the housing 132, wherein the ring gear 130 is securely mounted to the housing 132 and thus fixed relative to the housing, as can be seen from... Figure 18 I understand.

[0092] The input shaft 72 of the gearbox 16 is configured to introduce actuating torque into the sun gear 128. In other words, the input torque received by the input shaft 72 from the drive shaft of the motor 18 is transmitted and introduced into the sun gear 128. For this purpose, the input shaft 72 is connected to the sun gear 128 in a torque transmission manner. In the illustrated configuration, the sun gear 128 includes a connecting shaft 134, which is provided with an engagement section 136 that is form-fitted to the input shaft 72. In other words, the connecting shaft 134 forms part of the sun gear 128. Alternatively or additionally, the sun gear 128 may be force-fitted to the input shaft 72 of the gearbox. As can be seen from... Figure 18 It is understood that the input shaft 72 is provided with an engagement recess 138, which receives an engagement section 136 of the sun gear 128. The engagement section 136 is designed to complement and engage with the engagement recess 138 to form a keyed joint between the sun gear 128 and the input shaft 72. This prevents relative rotation between the two parts, allowing torque to be transmitted from the input shaft 72 to the sun gear 128, while allowing relative axial movement between the two parts along the axial direction A of the planetary gear assembly 122.

[0093] In order to be rotatably movable relative to the housing 132, the sun gear 128 is rotatably supported in the gearbox 16 by means of a first bearing 74 and another first bearing 76 attached to the outer surface of the input shaft 72. Figure 18 It is understood that the first bearing 74 and the additional first bearing 76 are provided in the form of rolling bearings, particularly radial ball bearings, which are arranged spaced apart from each other along the axial direction A. Specifically, in the illustrated configuration, the first bearing 74 and the additional first bearing 76 constitute floating bearings for rotatably supporting the input shaft 72 together with the sun gear 128 within the housing 132 of the gearbox 16. In other words, connected to the input shaft 72 by keyed engagement, the sun gear 128 is rotatably supported within the housing 132 of the gearbox 16 about a rotation axis coinciding with the axial direction A.

[0094] The planetary gear assembly 122 includes a plurality of planetary gears 124, such as four planetary gears 124, which are arranged around and engage with the sun gear 128. The planetary gears 124 further engage with a ring gear 130, thus being positioned between the sun gear 128 and the ring gear 130. Each of the planetary gears 124 is rotatably mounted to a planetary gear carrier 126 so as to be rotatably movable relative to the planetary gear carrier 126 about its longitudinal axis. For this purpose, the planetary gear carrier 126 is rotatably supported in the gearbox 16, and particularly in the housing 132, by a second bearing 140 (also referred to as the "first planetary carrier bearing") and another second bearing 142 (also referred to as the "second planetary carrier bearing"). Thus, the planetary gear carrier 126 is rotatable relative to the housing 132 about a rotational axis coinciding with the axial direction A.

[0095] The planetary gear carrier 126 is made of at least two sections, which are structurally connected by a plurality of planetary pins 144, each of which supports one of the planetary gears 124. Specifically, the planetary gears 124 are rotatably mounted to the associated planetary pins 144 by means of bearing arrangements 145, which constitute a floating bearing arrangement having two mirror-image cylindrical roller bearings, as can be seen from... Figure 18 I understand.

[0096] When viewed from the output shaft 22 along the direction to the input shaft 72, i.e., in the axial direction A, the first section 146 of the planetary gear carrier 126 is arranged in front of the planetary gear 124 and the sun gear 128, while the second section 148 of the planetary gear carrier 126 is arranged behind the planetary gear 124 and around the sun gear 128, particularly around its connecting shaft 134. The first section 146 and the second section 148 form an integral component. The first section 146 of the planetary gear carrier 126 forms the output shaft 22, which is provided with a coupling recess 150 for receiving the planetary gear carrier 126 and connecting it to the drive shaft of the operating device, for example, by forming a keyed joint between the coupling recess and the drive shaft of the operating device.

[0097] The second section 148 of the planetary gear carrier 126 includes a hollow cylindrical support element 152 arranged around the sun gear 128, i.e., around its connecting shaft 134. In other words, the sun gear 128 is received within and coaxially arranged with the second section 148, i.e., its support element 152.

[0098] As described above, the planetary gear carrier 126 is rotatably supported in the housing 132 of the gearbox 16 by means of a second bearing 140 and another second bearing 142. Specifically, the second bearing 140 is attached to the outer surface of the support element 152, while the other second bearing 142 is attached to the outer surface of the first section 146 of the planetary gear carrier 126, i.e., to its cylindrical outer surface. With this configuration, the second bearing 140 and the other second bearing 142 are arranged on opposite sides relative to the planetary gear 124 of the planetary gear assembly 122, i.e., along the axial direction A. In the illustrated configuration, the second bearing 140 is provided in the form of a cylindrical roller bearing, particularly a NJ-designed cylindrical roller bearing. The other second bearing 142 is provided in the form of a roller bearing, particularly in the form of a double-row tapered roller bearing.

[0099] The arrangement and configuration of the first bearing 74 and the second bearing 140 are further described in detail below. (See also...) Figure 18 It is understood that the gearbox 16 is configured such that a first bearing 74 for supporting the sun gear 128 received in the input shaft 72 and a second bearing 140 for supporting the planetary gear carrier 126 at least partially overlap in the axial direction A of the planetary gear assembly 122. In other words, when viewed from the radial direction of the sun gear 128 or the input shaft 72, i.e., a radial direction extending perpendicular to the axial direction A, the first bearing 74 and the second bearing 140 are arranged continuously such that the first bearing 74 at least partially covers the second bearing 140. Specifically, as can be seen from... Figure 18It is understood that the first bearing 74 and the second bearing 140 overlap in the axial direction A along the entire length of the first bearing 74, that is, along its extension in the axial direction A.

[0100] Furthermore, the first bearing 74 and the second bearing 140 are arranged coaxially. In other words, the axial or longitudinal axis of the first bearing 74 coincides with the axial or longitudinal axis of the second bearing 140. Thus, the first bearing 74 is housed within the second bearing 140, that is, within the space defined by the second bearing 140. In other words, the second bearing 140 encloses the first bearing 74. Furthermore, the first bearing 74 and the second bearing 140 are configured such that their axial or longitudinal axes coincide with the axial direction A of the planetary gear assembly 122.

[0101] As described above, the first bearing 74 and the second bearing 140 are provided in the form of roller bearings. Such bearings generally comprise inner and outer ring raceways that define guide grooves for receiving and guiding rolling elements, such as ball or cylindrical elements. In this arrangement, the bearing is subjected to forces exerted by loads acting on the bearing, i.e., its rolling elements and its raceways. Typically, this force can be characterized by an effective line of force of the load acting on the rolling elements. In this context, the term "effective line of force" generally refers to the direction of the cumulative load acting on the rolling elements of the bearing. In other words, the effective line of force indicates the direction of the load acting on the rolling elements of the bearing. For example, in a ball bearing, the effective line of force forms the line of contact between the ball element and the raceway in a radial plane, through which the load is transferred radially from one raceway to another via the ball element.

[0102] In the illustrated configuration, the effective force lines of the first bearing 74 and the second bearing 140 are arranged in a plane P perpendicular to the axial direction A of the planetary gear assembly 122. In other words, both the effective force lines of the first bearing 74 and the second bearing 140 extend in a direction perpendicular to the axial direction A of the planetary gear assembly 122.

[0103] If possible Figure 18 It is understood that the first bearing 74 is inserted between the sun gear 128, i.e., the input shaft 72, and the planetary gear carrier 126, i.e., its hollow cylindrical support element 152. Specifically, the first bearing 74 is fastened to the circumferential inner surface of the support element 152 and the circumferential outer surface of the input shaft 72. Specifically, the outer ring raceway of the first bearing 74 is attached to the inner surface of the support element 152, wherein the inner ring raceway of the first bearing 74 is attached to the outer surface of the input shaft 72.

[0104] The second bearing 140 is inserted between the housing 132 and the planetary gear carrier 126, i.e., its hollow cylindrical support element 152. Specifically, the second bearing 140 is fastened to the circumferential outer surface of the support element 152 and to the circumferential inner surface of the housing 132. Specifically, the outer ring raceway of the second bearing 140 is attached to the inner surface of the housing 142, while the inner ring raceway of the second bearing 140 is attached to the outer surface of the support element 152.

[0105] Figure 19 A gearbox 16 according to another configuration is shown. The gearbox 16 shown is installed and used in a drive unit 12 provided as a KP arrangement drive unit, for example, as... Figure 9 and Figure 13 As depicted in the diagram. In this arrangement, the input shaft 72 and output shaft 22 of gearbox 16 are arranged perpendicular to each other. This gearbox arrangement can also be referred to as a bevel planetary gearbox.

[0106] and Figure 18 Compared to the arrangement described in the book, in Figure 19 In the gearbox 16 shown, the input shaft 74 and the sun gear 128 are not directly connected to each other. Instead, a bevel gear arrangement 153 is inserted therebetween to mechanically connect the input shaft 74 to the sun gear 128 in a torque transmission manner.

[0107] The bevel gear arrangement 153 includes an intermediate shaft 154 mechanically connected to both the sun gear 128 and the input shaft 72. Specifically, the intermediate shaft 154 is provided with an engagement recess 138 for receiving the engagement section 136 of the sun gear 128 and for providing a keyed joint between the two components. The sun gear 128 and the intermediate shaft 154 are arranged coaxially. The intermediate shaft 154, and the sun gear 128 therein, are rotatably supported in the housing 132 of the gearbox 16 by means of a first bearing 74 and two additional first bearings 156, 158. The first bearing 74 is provided in the form of a ball roller bearing, particularly in the form of a double-row ball roller bearing, wherein the two additional first bearings are provided by a NU-designed cylindrical roller bearing 156 and a four-point bearing 158.

[0108] The intermediate shaft 154 also includes a first bevel gear 160 disposed at its end section. Specifically, the first bevel gear 160 is arranged circumferentially around the sun gear 128, i.e., its engagement section 136. The first bevel gear 160 is designed to complement and engage with a second bevel gear 162 disposed at the input shaft 72, so as to mechanically connect the intermediate shaft 154, and thus the sun gear 128, to the input shaft 72 in a torque transmission manner. Figure 19 It is understood that the input shaft 72 and the intermediate shaft 154, i.e. their rotation axes, are arranged perpendicular to each other, wherein the distance angle between the first bevel gear 160 and the second bevel gear 162 is 45°.

[0109] The input shaft 72 is rotatably supported in the housing 132 of the gearbox 16 by means of a ball roller bearing 164, a radial ball bearing 166, and a NU-designed cylindrical roller bearing 168. At a first end, the input shaft 72 is configured to be mechanically coupled to the drive shaft of the motor 18 in a torque transmission manner. At a second end opposite to the first end, the input shaft 72 is provided with a second bevel gear 162.

[0110] If possible Figure 19 It is understood that the intermediate shaft 154 is also provided with another hollow cylindrical support element 170, to which the first bearing 74 is connected. The other support element 170 extends along the axial direction of the intermediate shaft 154 from the first bevel gear 160 toward the sun gear 128. (As can be seen from...) Figure 19 It is understood that the first bearing 74 is inserted between the housing 132 and another support element 170. More specifically, the first bearing 74 is fastened to the circumferential inner surface of the housing 132 and the circumferential outer surface of the other support element 170. Specifically, the outer ring raceway of the first bearing 74 is attached to the inner surface of the housing 132, while the inner ring raceway of the first bearing 74 is attached to the outer surface of the other support element 170.

[0111] In addition, such as from Figure 19 It is understood that the second bearing 140 is inserted between the planetary gear carrier 126, i.e., its support element 152, and the intermediate shaft 154, i.e., its other support element 170. Specifically, the second bearing 140 is fastened to the circumferential outer surface of the support element 152 and to the circumferential inner surface of the other support element 170. Specifically, the inner ring raceway of the second bearing 140 is attached to the outer surface of the support element 152, wherein the outer ring raceway of the second bearing 140 is attached to the inner surface of the other support element 170.

[0112] In this configuration, when viewed from the radial direction of the sun gear 128, the support element 152, the second bearing 140, the other support element 170, the first bearing 74, and the housing 132 are arranged continuously, i.e., front to back.

[0113] If possible Figure 19 It is understood that the first bearing 74 and the second bearing 140 overlap in the axial direction A of the planetary gear assembly 122. Specifically, the first bearing 74 and the second bearing 140 overlap in the axial direction A along the entire length of the second bearing 140. Furthermore, the first bearing 74 and the second bearing 140 are arranged coaxially, wherein the effective force line of the first bearing 74 is parallel to the effective force line of the second bearing 140, as shown below. Figure 19 The dashed line indicates this.

[0114] The connection between the motor unit 14 and the gearbox 16 is described in detail below.

[0115] In order to structurally connect the motor unit 14 to the gearbox 16 within the drive unit 12, a method such as... is provided. Figures 20 to 23 The depicted connecting flange 170 is typically intended and configured to be mounted within the drive unit 12 of a mining machine as described above. The connecting flange 170 is configured to structurally connect the motor unit 14 and the gearbox 16 to each other within the drive unit 12. In other words, in the assembled state of the drive unit 12, both the motor unit 14 and the gearbox 16 are fixed, i.e., securely mounted to the connecting flange 170. Specifically, the connecting flange 170 is arranged such that, in the assembled state of the drive unit 12, it is inserted between the motor unit 14 and the gearbox 16. When viewed in the direction of the longitudinal axis X of the drive unit 12, the gearbox 16, the connecting flange 170, and the motor unit 14 are arranged continuously, i.e., front to back.

[0116] The motor unit 14 and the gearbox 16 are connected in a torque transmission manner, such that the actuating torque applied to the motor shaft of the motor unit 14 can be introduced into the gearbox via the input shaft 72 of the gearbox 16. For this purpose, the motor unit 14 and the gearbox 16 are interconnected by a drive shaft, which can be formed by at least one of the motor shaft and the input shaft 72.

[0117] The connecting flange 170 is provided with a through opening 172 extending along the longitudinal axis L of the connecting flange 170. Therefore, the connecting flange 170 is designed and configured such that, in the assembled state of the drive unit 12, the drive shaft, which interconnects the motor unit 14 and the gearbox 16 in a torque transmission manner, is received in the through opening 172 and extends through the through hole. In other words, in the assembled state of the drive unit 12, the longitudinal axis L of the connecting flange is parallel to or coincides with the longitudinal axis of the drive unit 12, and coincides with the rotation axis or longitudinal axis of the drive shaft. Therefore, in the assembled state of the drive unit 12, the drive shaft is supported in the drive unit 12 such that it can rotate relative to the housing of the motor unit 14, the housing of the gearbox 16, and the connecting flange 170.

[0118] Furthermore, the connecting flange 170 includes a motor unit-side end 174, which forms a motor unit-side interface of the connecting flange 170 for structurally connecting, i.e., fixing, the motor unit 14 to the connecting flange 170. Opposite to the motor unit-side end 174, the connecting flange 170 also has a gearbox-side end 176, which forms a gearbox-side interface of the connecting flange 170 for structurally connecting, i.e., fixing, the gearbox 16 to the connecting flange 170 at a predetermined position and with respect to its orientation.

[0119] Specifically, the connecting flange 170 shown constitutes an adapter-like component of the drive unit 12, which is separately disposed from the motor unit 14 and gearbox 16 and configured to properly connect the motor unit 14 to the gearbox 16. For this purpose, the connecting flange 170 is designed for both the motor unit and the gearbox. In other words, the connecting flange 170 is associated with a specific combination of the motor unit and the gearbox. Furthermore, the connecting flange 170 is configured to be interchangeable in the drive unit 12. Thus, the connecting flange 170 can be exchanged and replaced by another connecting flange, particularly depending on the motor unit 14 and gearbox 16 to be used in the drive unit 12. Alternatively, the connecting flange 170 can be configured and designed such that it can be used in combination with different types of motor units 14 or gearboxes 16.

[0120] Specifically, the connecting flange 170 shown is configured to structurally connect the motor unit 14 and the gearbox 16 in four different spatial arrangements relative to each other. In the context of this disclosure, the term "spatial arrangement" refers to the relative arrangement between the motor unit 14 and the gearbox 16, i.e., with respect to their position and orientation relative to each other.

[0121] The connecting flange 170 is configured and designed such that, in different spatial arrangements, the motor unit 14 and the gearbox 16 are rotated offset relative to each other. In other words, the connecting flange 170 is configured and designed such that, in a first assembly state, the motor unit 14 and the gearbox 16 are connected to the connecting flange 170 in a first spatial arrangement, and in each of the second to fourth assembly states, with respect to the second to fourth spatial arrangements, the motor unit 14 and the gearbox 16 are rotated offset relative to each other. Specifically, the connecting flange 170 is configured such that, in any of the first to fourth assembly states, the motor unit 14 rotates about the longitudinal axis L of the connecting flange 170 relative to the gearbox 16 with respect to any other of the first to fourth assembly states. In the illustrated configuration, the connecting flange 170 is configured such that, in any of the first to fourth assembly states, the motor unit 14 rotates about 90° or 180° about the longitudinal axis L of the connecting flange 170 relative to the gearbox 16 with respect to any other of the second to fourth assembly states.

[0122] To this end, the connecting flange 170 is configured, via the motor unit side end 174, to hold the motor unit 14 in four different mounting positions, wherein the motor unit 14 is rotated and offset relative to the connecting flange 170. In other words, when in the first mounting state, the motor unit 14 is connected to the connecting flange 170 in the first mounting position; with respect to any other of the second to fourth mounting states in which the motor unit 14 is connected to the connecting flange 170 in the second to fourth mounting positions, the motor unit 14 is rotated and offset relative to the connecting flange 170. Therefore, the connecting flange 170 is configured such that, in the first mounting state, the motor unit 14 rotates approximately 90° or 180° relative to the connecting flange about the longitudinal axis L of the connecting flange 170 with respect to any of the second to fourth mounting states.

[0123] More specifically, in the illustrated configuration, the connecting flange 170 is configured to restrict the connection between the motor unit 14 and the connecting flange 172 to four different mounting positions, in which the relative orientation between the motor unit 14 and the connecting flange 170 is predefined. The predetermined relative orientation between the motor unit 14 and the connecting flange 170 differs between the four different mounting positions.

[0124] Furthermore, the connecting flange 170 is configured to hold the gearbox 16 in a single mounting position by means of the gearbox-side end 176. In other words, the connecting flange 170 is configured to restrict the connection between the gearbox 16 and the connecting flange 170 to a single mounting position, wherein the relative orientation between the gearbox 16 and the connecting flange 170 is predefined. Therefore, the gearbox-side end 176 of the connecting flange 170 is designed such that the gearbox 16 can be fastened to the connecting flange 170 in only a single mounting position.

[0125] In the following text, see references Figure 22 The structural configuration of the motor unit side end 174 is described in detail, which enables the motor unit 14 to be fixed to four different mounting positions of the connecting flange 170.

[0126] If possible Figure 22 It is understood that the motor unit side end 174 of the connecting flange 170 includes a plurality of first interface elements 178, 180. Generally, in the context of this disclosure, the term "interface element" refers to an element configured to structurally interconnect or align two components with each other in a predetermined position and orientation. Thus, the first interface elements 178, 180 are configured to provide at least one of a form-fit connection and a force-fit connection between the motor unit 14 and the connecting flange 170. Furthermore, in the context of this disclosure, the term "plural first interface elements" refers to all interface elements used or required when properly connecting the motor unit 14 to the connecting flange 170.

[0127] Specifically, the plurality of first interface elements 178, 180 include a first coupling profile 178, which is designed to complement another first coupling profile provided in the coupling recess at the motor unit 14. Thus, in each of the first to fourth mounting states in which the motor unit 14 is coupled to the coupling flange 170, the first coupling profile 178 is received within the coupling recess of the motor unit 14 (i.e., its other first coupling profile), thereby engaging with the complementary coupling recess such that the coupling flange 170 and the motor unit 14 are oriented relative to each other about a relative rotational orientation, particularly about the longitudinal axis L, and are thus properly connected and aligned.

[0128] The plurality of first interface elements 178, 180 also include a plurality of first through holes 180 configured to receive connecting screws or bolts, via which the motor unit 14 is force-fitted to the connecting flange 170.

[0129] If possible Figure 20 and Figure 22 It is understood that in the cross-sectional profile of the motor unit side end 174, i.e., in a plane perpendicular to the longitudinal axis L, the first connecting profile 178 and the first through hole 180 are arranged in a regular pattern. Essentially, the pattern formed by the first connecting profile 178 and the first through hole 180 in the cross-sectional profile can be divided into four congruent portions 182a-d, which are arranged adjacent to each other around the longitudinal axis L. This means that the four congruent portions 182a-d have the same shape and size, but different positions and orientations within the profile. The congruent portions 182a-d are rotated and offset relative to each other about the longitudinal axis L of the connecting flange 170. Theoretically, each of the four congruent portions 182a-d can be transformed into or equally positioned on each of the other congruent portions 182a-s by pivoting or rotating about the longitudinal axis L. The four congruent portions 182a-d are separated by a first line 184 and a second line 186, which are perpendicular to each other and perpendicular to the longitudinal axis L. More specifically, in the cross-sectional profile of the motor unit side end 174, a plurality of first interface elements are arranged rotationally symmetrically about the longitudinal axis of the connecting flange 170.

[0130] Through this structural arrangement of multiple first interface elements 178, 180, the proposed connecting flange 170 enables the motor unit 14 to be fixed in four different mounting positions.

[0131] In the following text, see references Figure 23 The structural configuration of the gearbox side end 176 is described in detail.

[0132] If possible Figure 23It is understood that the gearbox-side end 176 of the coupling flange 170 includes a plurality of second interface elements 188, 190. In the context of this disclosure, the term "plurality of second interface elements" refers to all interface elements used or required for properly coupling the gearbox 16 to the coupling flange 170. Therefore, each of the plurality of second interface elements 188, 190 is configured to provide at least one of a form-fit and force-fit connection between the gearbox 16 and the coupling flange 170.

[0133] Specifically, the plurality of second interface elements 188, 190 include a second coupling profile 188, which is designed to complement another second coupling profile provided in the coupling recess at the gearbox 16. Thus, in the mounted state where the gearbox 16 is fixed to the coupling flange 170, the second coupling profile 188 is received within the complementary coupling recess (i.e., the other second coupling profile of the gearbox 16), thereby engaging with the complementary coupling recess such that the coupling flange 170 and the motor unit 14 are formally fitted and aligned relative to each other with respect to their relative rotational orientation, particularly around the longitudinal axis L.

[0134] The plurality of second interface elements 188, 190 also include a plurality of second through holes 190 configured to receive connecting screws or bolts via which the gearbox 16 is force-fitted to the coupling flange 170.

[0135] If possible Figure 21 and Figure 23 It is understood that in the cross-sectional profile of the gearbox side end 176, i.e., in the plane perpendicular to the longitudinal axis L, a plurality of second interface elements 188, 90, i.e., the second connection profile 188 and the second through hole 190 are arranged non-mirror-symmetrically about at least one of a first line 192 perpendicular to the longitudinal axis L of the connection flange 170 and a second line 194 perpendicular to both the longitudinal axis L of the connection flange 170 and the second first line 192. The second first line 192 and the second second line 194 intersect at the longitudinal axis L.

[0136] With this structural configuration of multiple second interface elements 188, 190, the proposed connecting flange 170 restricts the connection between the gearbox 16 and the connecting flange 170 to a single mounting position, wherein the relative orientation between the connecting flange 170 and the gearbox 16 is predetermined.

[0137] In an alternative configuration, the motor unit side end 174 can be configured and used to connect the gearbox to the coupling flange 170 via a complementary design interface at the gearbox, wherein the gearbox side end 176 can be configured and used to connect the motor unit to the coupling flange 170 via a complementary design interface at the motor unit.

[0138] It will be apparent to those skilled in the art that these embodiments and items merely depict instances of a variety of possibilities. Therefore, the embodiments shown herein should not be construed as limiting these features and configurations. Within the scope of the invention, any possible combination and configuration of the described features can be selected.

[0139] This is especially true of the following optional features, which can be combined with some or all of the previously mentioned embodiments, items and / or features in any technically feasible combination.

[0140] An electrical terminal assembly for a drive unit of a mining machine can be provided. The electrical terminal assembly may include a junction box configured to be mounted to the drive unit. Furthermore, the electrical terminal assembly may include connecting elements for communicatively connecting the junction box to a control device of the drive unit. The electrical terminal assembly can be configured to be interchangeably arranged in at least two different configurations, each of which is associated with a different structural arrangement of the drive unit.

[0141] By adapting to different configurations, the proposed electrical terminal assembly can be adapted to different structural arrangements of the drive unit. This provides configurability for the electrical terminal assembly.

[0142] Preferably, an electrical terminal assembly is applied to a drive unit designed and configured for use in mining machines, particularly underground mining machines. However, the use of the electrical terminal assembly is not limited to this application, and it can also be used in conjunction with other drive units.

[0143] Electrical terminal assemblies can be configured to be releasably or detachably mounted to the drive unit, particularly the outer surface or its housing.

[0144] Furthermore, in this disclosure, the drive unit to which the proposed electrical terminal assembly is mounted is referred to as a drive unit arrangement. This drive unit arrangement can be used to drive operating equipment, particularly the operating equipment of mining machines, such as conveyors, cutters, or any other electrically driven components thereof.

[0145] As described above, the proposed electrical terminal assembly can be configured to be mounted on a drive unit. The drive unit to be used in conjunction with the electrical terminal assembly may include a motor unit housing a frequency converter and a motor, for example, provided as a synchronous machine powered by an inverter equipped with permanent magnets. A gearbox may be flanged to the motor unit, for example, mounted to its end surface, wherein the output shaft of the motor unit may be arranged parallel to or orthogonal to the output shaft of the gearbox. Furthermore, a clutch may be inserted between the motor unit and the gearbox.

[0146] To control the operation of the drive unit, a control device can be provided. The control device can be housed in the main terminal box of the drive unit, which can be specifically mounted to the outer surface of the drive unit, such as a motor unit.

[0147] To ensure the proper operation of the drive unit, the control device can be configured to monitor the operating conditions of the drive unit, i.e., the operating conditions of its components, during operation. For this purpose, at least one sensor is provided that detects or measures parameters indicating the operation of the drive unit's components. Specifically, the sensor may be housed in or mounted to the gearbox and is configured to measure or detect the operating conditions of individual components of the gearbox.

[0148] To communicate at least one sensor with the control device of the drive unit, an electrical terminal assembly can be provided. In other words, the proposed electrical terminal assembly can be configured to ensure proper control and operating condition monitoring functions of the drive unit by establishing communication connections between components, i.e., electronic components, arranged in the drive unit.

[0149] As described above, the electrical terminal assembly includes a junction box. Specifically, the electrical terminal assembly may include one or more junction boxes. The junction box may include or be connectable to, i.e., electrically connected to, at least one sensor configured to acquire data indicating the operating conditions of various components of the drive unit, particularly its gearbox. Furthermore, the junction box may be configured to transmit the data acquired by the at least one sensor to a control device via a connecting element.

[0150] Alternatively, the junction box may include a data acquisition device configured to collect or process data acquired by sensors, which is then forwarded to a control device via a connection element. With this configuration, the data acquisition device can perform preprocessing of the measurement data, i.e., the raw data, provided by at least one sensor. This can be done such that the measurement data is bundled and / or integrated, particularly in a predetermined form, before being forwarded to the control device. This ensures standardized and efficient communication between the control device and at least one sensor.

[0151] The junction box can be configured to communicate with a control device via a connecting element, which may in particular be a cable, such as a multiply cable. The connecting element may be provided with a first plug connector and a second plug connector disposed on opposite sides thereof.

[0152] The first plug connector of the connecting element can be configured to be detachably mounted to at least one corresponding interface or control port disposed on a junction box. For example, the junction box may include a first control port and a second control port, each configured to be detachably coupled to the connecting element. The first and second control ports may be located on opposite sides of the junction box. For example, the first control port may be located in an area or region on a first side of the junction box, and the second control port may be located in an area or region on a second side arranged opposite to the first side of the junction box. Thus, the first and second control ports can be spaced apart from each other to improve the configurability of the electrical terminal assembly.

[0153] In another development, the electrical terminal assembly can be configured in a first configuration where the connecting element is coupled to a first control port, and in a second configuration where the connecting element is coupled to a second control port. Furthermore, in the first configuration, the second control port can be unplugged, i.e., released from the connecting element or any other wire or cable. Therefore, in the second configuration, the first control port can be unplugged, i.e., released from the connecting element or any other wire or cable.

[0154] The second plug connector of the connecting element can be configured to be detachably mounted to at least one correspondingly designed interface or connector located on the control device side of the electrical terminal assembly, i.e., the main terminal box side, to communicatively connect the connecting element to the control device. For example, the electrical terminal assembly may include a connection socket located on the control device side of the electrical terminal assembly, and the junction box is communicatively connected to the connection socket via the connecting element. In other words, the connection socket can be arranged in the area of ​​the control device or the main terminal box housing the control device and can form an interface for the connecting element.

[0155] Specifically, the connection socket may include a first connector and a second connector, each configured to be detachably coupled to a connecting element, particularly its second plug connector. The first connector may be disposed in a region on a first side of the connection socket, and the second connector may be disposed in a region on a second side of the connection socket opposite to the first side. The electrical terminal assembly may be configured in a first configuration where the connecting element is coupled to the first connector, and in a second configuration where the connecting element is coupled to the second connector of the connection socket. Furthermore, in the first configuration, the second connector can be unplugged, i.e., released from the connecting element or any other wire or cable. Therefore, in the second configuration, the first connector can be unplugged, i.e., released from the connecting element or any other wire or cable. The first configuration described in conjunction with the arrangement of the connection socket may correspond to, or may differ from, the first configuration previously described in conjunction with the arrangement of the junction box. Therefore, the second configuration may correspond to, or may differ from, the second configuration previously described in conjunction with the arrangement of the junction box.

[0156] In another development, the junction box may include a first sensor port and a second sensor port, each configured to be detachably coupled to a sensor line for receiving at least one of a sensor input or a sensor output. In other words, the sensor line may be configured to supply sensor input to a sensor housed within the junction box. In this case, the sensor line may be a hydraulic feed line enabling fluid communication between the sensor and the drive unit, i.e., the gearbox. In this way, the sensor housed in the junction box can be activated to measure or detect conditions prevalent in the drive unit, i.e., the gearbox, such as pressure. Alternatively or additionally, the sensor line may be configured to supply a sensor output signal to the junction box, wherein the sensor output signal has already been generated by a sensor housed outside the junction box, for example, within the gearbox. In this case, the sensor line may be a cable for electrically connecting the junction box to the sensor to transmit data acquired by the sensor to the junction box.

[0157] The first sensor port and the second sensor port can be located on opposite sides of the junction box. For example, the first sensor port can be located in an area on the first side of the junction box, and the second sensor port can be located in an area on the second side opposite to the first side of the junction box. In this way, the first sensor port and the second sensor port can be positioned at a distance from each other.

[0158] Specifically, the electrical terminal assembly can be configured in a first configuration where the sensor wire is connected to a first sensor port, and in a second configuration where the sensor wire is connected to a second sensor port. Furthermore, in the first configuration, the second sensor port can be unplugged, i.e., released from the sensor wire or any other wire. Therefore, in the second configuration, the first sensor port can be unplugged, i.e., released from the sensor wire or any other wire.

[0159] The first configuration described in conjunction with the arrangement of the sensor ports may correspond to, or may differ from, the first configuration previously described in conjunction with the arrangement of the control ports in conjunction with the junction box and connection socket. Therefore, the second configuration may correspond to, or may differ from, the second configuration previously described in conjunction with the arrangement of the control ports in conjunction with the junction box and connection socket.

[0160] In another development, the electrical terminal assembly may further include a protective cover, which, when the electrical terminal assembly is secured to the drive unit, is configured to at least partially protect or shield the electrical terminal assembly. Specifically, the protective cover may be configured to cover the exposed wires or lines of the electrical terminal assembly, i.e., connecting elements and at least one sensor line.

[0161] The protective cover may have at least two shielding plates configured to be variably connected to each other, i.e., connected in different arrangements or configurations. Specifically, the protective cover may be configured to be interchangeably arranged in at least two different arrangements or configurations, each of which is associated with a different structural arrangement of the drive unit.

[0162] For this purpose, the shielding plate may include at least one first structural interface and at least one second structural interface, each configured to be detachably fastened to another shielding plate, i.e., an adjacent shielding plate. The electrical terminal assembly may be configured in a first configuration, wherein the first structural interface is fastened to another shielding plate, and in a second configuration, wherein the second structural interface is fastened to another shielding plate.

[0163] Furthermore, in the first configuration, the second structural interface can be released, meaning it is not connected to another shielding plate. Therefore, in the second configuration, the first structural interface can be released, meaning it is not connected to another shielding plate.

[0164] The first configuration described in conjunction with the arrangement of the shielding plate may correspond to any of the previously described first configurations of the electrical terminal assembly, or may differ therefrom. Therefore, the second configuration may correspond to any of the previously described second configurations of the electrical terminal assembly, or may differ therefrom.

[0165] At least one of the multiple shielding plates may have a symmetrical design, i.e., an axially symmetrical design.

[0166] In addition, a drive unit arrangement for a mining machine can be provided, which includes the drive unit and electrical terminal assembly as described above.

[0167] The drive units used in the drive unit arrangement can be configured to be arranged in at least two different structural arrangements, wherein the relative arrangements between the motor unit and the gearbox of the drive unit are different.

[0168] Another aspect of this disclosure refers to a gearbox for a drive unit in a mining machine, such as an underground mining machine, and to a drive unit equipped with such a gearbox.

[0169] In underground mining applications, drive units used to power equipment such as conveyors, cutters, or other driven components are typically equipped with gearboxes comprising two planetary gears, also known as two-stage planetary gearboxes, with a low-speed planetary gear group and a high-speed planetary gear group. This configuration provides speed and torque conversion from the drive unit's motor shaft to the gearbox's output shaft. Typically, in known drive units, the motor's drive shaft rotates at its nominal operating point at 1500 rpm, which is converted by the gearbox at gear ratios from 16 to 50.

[0170] During operation, the gearbox is subjected to thermal loads, particularly from its moving parts. To reduce these loads, it is known to wet the moving parts of the gearbox with a lubricant, thereby reducing friction between the moving parts and improving heat dissipation. For this purpose, the gearbox is designed such that the moving parts are at least partially immersed in a lubricant, i.e., oil, received in a lubricant reservoir within the gearbox during rotation.

[0171] In underground mining applications, a lubricant cooler is provided, comprising a heat exchanger positioned within a lubricant reservoir for dissipating heat from the lubricant received in a gearbox. In this way, heat can be transferred from the lubricant to a cooling medium flowing through the heat exchanger, thereby dissipating heat from the gearbox.

[0172] In known gearboxes used in underground mining machines, high-speed planetary components are designed to be guided through a lubricant reservoir during operation. Due to the high rotational speed of the moving parts in this stage, adequate distribution of lubricant within the gearbox and its movement within the lubricant reservoir is ensured. In this way, while circulating within the lubricant reservoir, the lubricant flows above the outer surface of the heat exchanger, thereby establishing heat transfer through convection between the lubricant and the cooling medium flowing through the heat exchanger.

[0173] Due to recent developments, drive units for mining machines can be equipped with synchronous motors fed by inverters with permanent magnets. However, compared to the electric motors typically used in drive units of mining machines, such motors can operate at a relatively low motor speed at their nominal operating point, approximately 300 rpm. Because of the lower motor speed, gearboxes with reduced gear ratios can be used in such drive units. Therefore, using only a single-stage planetary gearbox may be sufficient. Consequently, the high-speed planetary stage can be omitted, resulting in a compact and less complex design.

[0174] However, by omitting the high-speed planetary stage, the flow or movement of lubricant in the gearbox, especially in the lubricant reservoir, can be slowed down, thereby affecting the convective heat transfer between the lubricant and the cooling medium.

[0175] On the other hand, it could be an objective to provide an improved gearbox, which is particularly compact in design and at the same time prevents the gearbox from being subjected to excessive thermal loads. Furthermore, an objective could be to provide a drive unit equipped with such a gearbox.

[0176] Therefore, a gearbox for a mining machine drive unit can be provided, the gearbox including a paddle element attached to an actuable shaft. The paddle element can be configured to dispose of lubricant, such as oil, received within the housing of the gearbox during movement when the shaft is actuated. In other words, when the shaft of the gearbox is actuated, the paddle element can be configured to be guided through the lubricant received within the housing, thereby actuating the lubricant to cause movement or circulation of the lubricant within the housing.

[0177] By providing a paddle element, the proposed gearbox ensures adequate distribution of lubricant among the moving parts of the gearbox, even with a reduced nominal speed of the moving parts compared to known gearboxes. This reduces friction between the moving parts, thereby reducing heat generation during gearbox operation. Furthermore, by providing the paddle element, the proposed gearbox ensures sufficient movement or circulation of the lubricant within its housing, thereby increasing the rate of heat dissipation from the lubricant via convection. This improves the effectiveness of heat dissipation from the lubricant. Therefore, the proposed solution prevents the gearbox from being subjected to excessive thermal loads, even with a reduced nominal speed of the moving parts compared to known gearboxes.

[0178] As described above, the proposed gearbox is used in the drive unit of a mining machine, such as an underground mining machine or a longwall mining machine. Such drive units are preferably used to drive operating equipment, such as conveyors, cutters, or other driven components of a mining machine, but are not limited to this application.

[0179] The drive unit to be used in conjunction with the gearbox may also include, for example, a motor unit housing an inverter and a motor. Specifically, the motor may be provided in the form of a synchronous machine powered by an inverter equipped with permanent magnets. The motor may be configured such that at its nominal, expected, or optimal operating point, it operates at less than 1400 rpm, 1300 rpm, or 1000 rpm, for example, 1000 rpm to 200 rpm, 400 rpm to 200 rpm, or 350 rpm to 250 rpm, particularly around 300 rpm.

[0180] The motor unit may include a motor shaft that serves as its drive shaft. The motor shaft may be connected to the input shaft of the gearbox, for example, directly or via a clutch, in a torque transmission manner.

[0181] Typically, a gearbox can be configured to provide speed and torque conversion from its actuated input shaft to its output shaft. Specifically, for this purpose, a gearbox can be designed to provide a gear ratio between 3 and 15. In other words, a gearbox can be configured to convert the movement of its input shaft such that the output shaft rotates at a speed 3 to 15 times smaller than the speed of the input shaft. Therefore, a gearbox can be configured to convert the torque acting on the input shaft such that the torque acting on the output shaft is 3 to 15 times greater than the torque acting on the input shaft.

[0182] As explained above, the propeller element can be attached to an actuable shaft of the gearbox, hereinafter referred to as the "shaft," which can be a rotatable actuated shaft. Preferably, the shaft can be the input shaft of the gearbox, which, in the described application, can rotate at a higher speed than the output shaft. Alternatively, the shaft can be the output shaft or any other shaft of the gearbox.

[0183] Specifically, the gearbox can be a single-stage planetary gear system, also known as a planetary spur gear train. In this configuration, the input shaft of the gearbox can be torque-transmitted to the sun gear, while the output shaft can be torque-transmitted to the planetary carrier or the ring gear of the planetary gears. With this configuration, the gearbox can be configured with only the low-speed planetary stage. In other words, the high-speed planetary stage used in known gearboxes can be omitted, thus making the gearbox design compact and less complex.

[0184] The gearbox may include a housing that houses the moving parts of the gearbox. The housing may be configured to define a lubricant reservoir or lubricant collector for receiving a lubricant, such as oil. Specifically, the lubricant reservoir may be arranged such that, upon actuation of the shaft, the gearbox shaft is at least partially immersed in or positioned in the lubricant received in the lubricant reservoir.

[0185] The gearbox can be configured such that during operation of the gearbox, i.e., when the shaft is actuated, the paddle element is configured to be at least partially immersed in the lubricant received in the lubricant reservoir. In other words, when the shaft is rotated, the paddle element can be moved such that it is at least partially immersed and thus guided through the lubricant received in the lubricant reservoir, thereby inducing movement of the lubricant received in the lubricant reservoir.

[0186] The propeller element can be attached to the outer surface of the shaft, particularly the circumferential surface or periphery, for example, by form-fit and / or force-fit. For instance, the propeller element can be arranged between two bearings along the longitudinal axis of the shaft, through which the shaft is rotatably mounted to the gearbox housing.

[0187] Specifically, a propeller element may include at least one blade, also referred to as a propeller. For example, a propeller element may include more than one blade, which may be regularly positioned on the circumferential surface of the shaft about its longitudinal axis.

[0188] At least one blade can be configured such that it rises or extends from the outer surface of the shaft in the radial direction. Alternatively or additionally, at least one blade can extend along the longitudinal axis of the shaft. In other words, the effective surface of at least one blade can extend in a plane spanned by the longitudinal and radial axes of the shaft. Specifically, the effective surface of at least one blade can be provided in a trapezoidal form, particularly a right-angled trapezoid or an acute-angled trapezoid. Thus, at least one blade can be provided in the form of a prism, the cross-sectional profile of which can be trapezoidal, particularly a right-angled trapezoid or an acute-angled trapezoid.

[0189] In another development, the propeller element can be formed as multiple parts, which can be loosely fastened to each other, for example, by force-fitting and / or form-fitting methods. Alternatively, the propeller element can be formed integrally.

[0190] For example, the propeller element can be provided in the form of a propeller wheel. The propeller wheel may include an annular element with multiple blades disposed on its outer surface. In other words, a plate may be disposed around the periphery of the annular element. The annular element may be circumferentially positioned or mounted around the outer surface of the shaft, i.e., its periphery.

[0191] Furthermore, the annular element of the propeller may be provided with at least one engagement for releasably connecting the two ends or sections of the annular element to each other. For example, the annular element may be provided with one engagement for releasably connecting the two ends or sections of the annular element, while on the opposite side of the engagement, the annular element may be provided with another engagement. This ensures that the annular element can be opened or unfolded for easy assembly to and / or disassembly from the shaft. As an alternative or supplement to the joint, the annular element may be at least partially made of an elastic or flexible material to allow for unfolding of the annular element. Alternatively or additionally, the annular element may be provided with two engagements, which may be arranged on opposite sides of the annular element. The engagements may be formed by connecting elements, such as screws or pins, which are respectively guided through and connected to correspondingly designed openings provided at the two sections or ends of the annular element.

[0192] As described above, the annular element can be provided with two joints arranged on opposite sides. With this configuration, the propeller element can be composed of two parts, which can be mounted together on a shaft, even if the shaft is already received in a bearing within the housing. This facilitates the assembly and disassembly of the propeller element.

[0193] In another development, the proposed gearbox may be equipped with at least one lubricant cooling unit. Preferably, the lubricant cooling unit is used in conjunction with the aforementioned propeller element, but is not limited thereto. Alternatively, the lubricant cooling unit described below may also be used or implemented in the gearbox without the aforementioned propeller element.

[0194] The use of a lubricant cooling unit may be particularly relevant when the gearbox is used in underground mining applications. This is because the ambient temperature in underground mining environments can be relatively high, and thermal conductivity can be reduced due to dust accumulation on the outer surfaces of the mining machine, as well as protective measures such as explosion-proof and dustproof measures, thereby reducing the rate at which the lubricant received in the gearbox housing dissipates heat.

[0195] The lubricant cooling unit may include at least one heat exchanger through which a cooling medium is guided or circulated. For example, the cooling medium may be water. The heat exchanger may include at least one cooling tube, such as a spiral cooling tube, having a supply opening and a discharge opening for the cooling medium. Specifically, the heat exchanger may be configured to transfer heat from the lubricant received in the housing to the cooling medium flowing through the heat exchanger. To this end, the heat exchanger is contemplated and configured to contact the lubricant received in the gearbox housing during its operation. Therefore, the heat exchanger may be located within the gearbox housing.

[0196] In addition, the lubricant cooling unit may include a spray unit configured to spray lubricant onto the heat exchanger. This ensures that the heat exchanger is wetted or in contact with the lubricant housed within the gearbox housing during its operation.

[0197] Specifically, the gearbox can be configured such that, in its installed state, i.e., when it is installed in the mining machine together with the drive unit, at least one of the heat exchanger and the injection unit is arranged at least partially outside the lubricant reservoir.

[0198] The injection unit may include injection elements, such as injection tubes, for spraying and distributing lubricant onto the outer surface of the heat exchanger. Specifically, the injection tube may extend parallel to the heat exchanger and may be provided with multiple discharge openings for discharging lubricant. The discharge openings may be configured such that they face the heat exchanger. In other words, the injection tube may be arranged alongside and within the heat exchanger to ensure that the heat exchanger is wetted with lubricant, preferably along its entire length.

[0199] Furthermore, the injection unit is connected to a pump configured to supply lubricant received in a lubricant reservoir to the injection elements. The pump can be provided so as to be actuated by rotational movement of the shaft. For this purpose, the pump may include an idler wheel designed to complement and engage with a pump drive gear arranged circumferentially around the shaft, i.e., around its longitudinal axis.

[0200] The pump can be connected to a suction component that protrudes from or is immersed in the lubricant reservoir when the gearbox is in operation or in the installed state. In this way, at least one suction opening can be positioned in the lubricant reservoir to collect lubricant and guide it toward the pump.

[0201] In another development, the suction element can be configured to be arranged in at least two different positions relative to the housing. In this state, the suction element is positioned in a first position, and at least one suction opening is displaced relative to the state of the suction element in the second position. In these two different positions, the suction element can be oriented in different directions relative to the housing of the gearbox. For example, the suction element can be arranged such that in the first position, it is oriented in the opposite direction to its state in the second position. For this purpose, the suction element can be pivotally mounted to the housing. In this configuration, the suction element can pivot about an axis that is substantially perpendicular to the longitudinal axis.

[0202] In this way, the lubricant cooling unit can be adapted to different installation conditions of the drive unit, thereby providing a certain degree of configurability. In other words, by providing such a lubricant cooling unit, the gearbox can be installed in different mounting positions or orientations within the mining machine; that is, different sides of the gearbox can constitute its upper side.

[0203] In another development, the gearbox may include at least two lubricant cooling units as described above. This provides a degree of redundancy. The at least two lubricant cooling units may be arranged on opposite sides within the gearbox housing. In this way, it can be ensured that even if the gearbox is installed in different mounting positions or orientations within the mining machine, a sufficiently large portion of the lubricant cooling unit is positioned on the lubricant reservoir, allowing sufficient heat to be transferred from the lubricant to the cooling medium flowing through the different heat exchangers. For example, the two lubricant cooling units may be arranged opposite each other relative to the longitudinal axis of the shaft. The housing may have a rectangular cross-sectional shape between the longitudinal axes of the shaft, wherein the heat exchangers and the spray elements of the different lubricant cooling units may be parallel to and extend within the range of the opposite sides of the housing. With this arrangement, the gearbox can be installed in different mounting positions or orientations within the mining machine, which may be offset relative to each other about the longitudinal axis of the shaft, for example, about 90°, 180°, and 270°, while ensuring adequate cooling of the lubricant for each different position or orientation. In other words, the gearbox can be installed in different mounting positions or orientations, and the configuration of the lubricant cooling unit can ensure adequate cooling in each of these mounting positions.

[0204] In summary, each of the above measures, namely providing the propeller element and the lubricant cooling unit including the injection element, can ensure a sufficiently high heat flow rate from the lubricant to the cooling medium flowing through the heat exchanger in the gearbox at relatively low motor speeds, such as below the nominal speed.

[0205] In addition, a drive unit for a mining machine (e.g., an underground mining machine, such as a longwall mining machine) equipped with the aforementioned gearbox can be provided.

[0206] Since the drive unit is equipped with the aforementioned gearbox, the technical features described in connection with the gearbox in this disclosure can also be related to and applied to the proposed drive unit, and vice versa.

[0207] Specifically, the drive unit may include a motor connected to a gearbox, wherein the motor is, for example, a synchronous machine powered by an inverter equipped with permanent magnets, the synchronous machine having a motor speed of less than 1400 rpm, 1300 rpm, or 1000 rpm at its nominal, expected, or optimal operating point, for example between 1000 rpm and 200 rpm, or between 400 rpm and 200 rpm, or between 350 rpm and 250 rpm, particularly about 300 rpm.

[0208] To address the goal of providing an improved gearbox, one of the following items can be provided:

[0209] 1. A gearbox (16) of a mining machine drive unit (12) including a paddle element (80) attached to an actuable shaft (72) of the gearbox (16) for distributing lubricant received in the housing of the gearbox (16) during movement when the shaft (72) is actuated.

[0210] 2. According to the gearbox in Project 1, it is a single-stage planetary gear.

[0211] 3. The gearbox according to item 1 or 2, wherein the housing of the gearbox (16) defines a lubricant reservoir, wherein the paddle element (80) is configured to be at least partially immersed in the lubricant received in the lubricant reservoir when the actuating shaft (72) is engaged.

[0212] 4. A gearbox according to any one of items 1 to 3, wherein the propeller element (80) includes at least one blade (84), the effective surface of which extends in a plane spanned by the longitudinal axis (78) and the radial axis of the shaft (72).

[0213] 5. A gearbox according to any one of items 1 to 4, wherein the paddle element (80) is formed as a plurality of parts that can be releasably fastened to each other.

[0214] 6. A gearbox according to any one of items 1 to 5, wherein the propeller element (80) is provided in the form of a propeller wheel, the propeller wheel including an annular element (82) and a plurality of blades (84) arranged around the annular element.

[0215] 7. The gearbox according to item 6, wherein the annular element (82) is provided with at least one engagement (86) for releasably connecting two portions of the annular element (82) to each other.

[0216] 8. The gearbox according to any one of items 1 to 7 further includes a lubricant cooling unit (90; 92) having a heat exchanger (94) and an injection unit (102) configured to spray lubricant onto the heat exchanger (94).

[0217] 9. The gearbox according to item 8, wherein, in the installed state of the gearbox (16), the heat exchanger (94) is arranged at least partially outside the lubricant reservoir within the housing.

[0218] 10. The gearbox according to item 8 or 9, wherein the injection unit (102) includes an injection element (104) extending parallel to the heat exchanger (94) and having a plurality of discharge openings facing the heat exchanger (94).

[0219] 11. According to the gearbox of item 10, wherein the injection unit (102) is connected to a pump (106) configured to supply lubricant received in the lubricant reservoir to the injection element (104), wherein the pump (104) is actuated by the rotational movement of the shaft (72).

[0220] 12. The gearbox according to item 11, wherein the pump (106) is connected to a suction member (114), the suction member being arranged in the mounted state of the gearbox (16) to be at least partially immersed in lubricant received in the lubricant reservoir, and wherein the suction member (114) is configured to be arranged in at least two different locations relative to the housing of the gearbox (16).

[0221] 13. A gearbox according to any one of items 1 to 12, comprising at least two lubricant cooling units (90; 92) arranged on opposite sides within the housing of the gearbox (16).

[0222] 14. A drive unit (12) for a mining machine, comprising a gearbox (16) according to any one of items 1 to 13.

[0223] 15. The drive unit according to item 14 further includes a motor (18) connected to the gearbox (16), wherein the motor (18) is an inverter-fed synchronous machine, the synchronous machine having a motor speed of less than 1000 rpm, particularly about 300 rpm, at its nominal operating point.

[0224] Another aspect of this disclosure refers to a gearbox used in a mining machine drive unit, and in particular to the spatial arrangement of its bearings, and a drive unit equipped with such a gearbox.

[0225] In underground mining applications, drive units used to drive operating equipment (such as conveyors, cutters, or other driven components) are typically equipped with gearboxes that include at least one planetary gear assembly to provide speed and torque conversion from the motor shaft of the drive unit to the output shaft of the gearbox.

[0226] In known gearboxes, the planetary gear assembly includes multiple planetary gears carried by a planetary gear carrier and guided between a sun gear and a ring gear. Specifically, the planetary gears are rotatably supported in the planetary gear carrier, which itself is rotatably supported within the gearbox. Additionally, the sun gear is rotatably supported, with the axes of rotation of the sun gear and the planetary gear carrier coinciding. For this purpose, the ring gear is fixedly mounted to the gearbox housing.

[0227] Specifically, in order to rotatably support the planetary gear carrier and the sun gear within the gearbox, a plurality of bearings are provided, arranged around the longitudinal axis of the gearbox and positioned in a distributed manner along the longitudinal axis.

[0228] Due to recent developments, it may be advantageous to provide gearboxes for mining machine drive units with improved space efficiency.

[0229] Therefore, to consider another aspect, the objective could be to provide a gearbox for use in a mining machine drive unit with a compact design. Furthermore, the objective could be to provide a drive unit equipped with such a gearbox.

[0230] Therefore, a gearbox can be provided for use in a mining machine drive unit, specifically a gearbox configured to be installed in a mining machine drive unit. The gearbox may have a planetary gear assembly comprising a sun gear rotatably supported in the gearbox by means of a first bearing and planetary gear carriers rotatably supported in the gearbox by means of a second bearing. The first and second bearings can be designed and arranged such that they at least partially overlap in the axial direction of the planetary gear assembly.

[0231] By utilizing the proposed arrangement of the first and second bearings, where they at least partially overlap in the axial direction, the overall axial length of the gearbox can be reduced. For this purpose, the first and second bearings can be fitted within each other in this configuration, which helps to improve or optimize space utilization, thus contributing to improved space efficiency of the gearbox. Therefore, compared to known gearboxes, the gearbox with the proposed arrangement of the first and second bearings can have a more compact design, wherein the bearings supporting the sun gear and planetary gear carriers are spaced apart from each other in the axial direction.

[0232] It should be noted that the features of the gearbox can be combined with those previously described in this disclosure. For example, the proposed gearbox described below can be equipped with the propeller element and / or lubricant cooling system disclosed above.

[0233] The proposed gearbox is contemplated and configured for use in the drive unit of a mining machine (e.g., an underground mining machine, such as a longwall mining machine). Such a drive unit is preferably used to drive operating equipment, such as a conveyor, a cutter, or other driven parts of a mining machine, but is not limited to this application.

[0234] The drive unit to be used in conjunction with the gearbox may also include, for example, a motor unit housing an inverter and a motor. Specifically, the motor may be provided in the form of a synchronous machine powered by an inverter equipped with permanent magnets. The motor unit may include a motor shaft serving as its drive shaft. The motor shaft may be connected to the input shaft of the gearbox, for example, directly or via a clutch, in a torque transmission manner. Typically, the gearbox may be configured to provide speed and torque conversion from its actuated input shaft to its output shaft.

[0235] The gearbox can be an in-line planetary gearbox, in which the input and output shafts are arranged substantially parallel or coincidentally. This gearbox can be installed or used in a P-type drive unit. Alternatively, the gearbox can be a bevel planetary gearbox, in which the input and output shafts are arranged substantially perpendicular to each other. This gearbox can be installed or used in a KP-type drive unit.

[0236] The gearbox can be designed to provide gear ratios between 3 and 15. For this purpose, the gearbox may include planetary gear assemblies. The planetary gear assemblies can interconnect the input and output shafts of the gearbox in a torque transmission manner.

[0237] The basic structural configuration and characteristics of planetary gear assemblies are well known to those skilled in the art and therefore are not described in further detail. Instead, the characteristics and technical features of gearboxes that are related to aspects of this disclosure are discussed below.

[0238] The planetary gear assembly may include multiple planetary gears, such as three, four or more, carried by a planetary gear carrier and guided between and engaging with the sun gear and ring gear. The planetary gear assembly may be housed within the gearbox housing.

[0239] The ring gear can be fixedly mounted to the housing. As described above, the sun gear and planetary gear carriers are rotatably supported within the gearbox. Furthermore, the planetary gears can be rotatably mounted to their respective carriers. In other words, the sun gear, planetary gears, and planetary gear carriers are supported within the gearbox, allowing them to rotate relative to the gearbox housing. For this purpose, a first bearing and a second bearing can be provided, the first bearing being configured to rotatably support the sun gear within the gearbox, i.e., its housing, and the second bearing being configured to rotatably support the planetary gear carriers within the gearbox, i.e., its housing.

[0240] As explained above, the first and second bearings may at least partially overlap in the axial direction of the planetary gear assembly. In other words, when viewed from the radial direction of the planetary gear assembly, i.e., extending perpendicular to the axial direction, the first and second bearings may be arranged continuously such that the first bearing at least partially covers the second bearing, or vice versa. For example, the first and second bearings may overlap along the entire length of the first or second bearing in the axial direction, i.e., along their axial direction in the planetary gear assembly.

[0241] The axial direction of the planetary gear assembly may coincide with at least one of the longitudinal or rotational axis of the sun gear, the longitudinal or rotational axis of the planetary gear carrier, the longitudinal axis of the gearbox, the longitudinal axis of the input shaft, and the longitudinal axis of the output shaft.

[0242] Furthermore, the first and second bearings can be arranged coaxially. In other words, the longitudinal or rotational axis of the first bearing can coincide with the longitudinal or rotational axis of the second bearing. The first bearing can at least partially enclose the second bearing, or vice versa. This allows for a compact arrangement of the first and second bearings within the gearbox.

[0243] At least one of the first and second bearings can be a roller bearing. For example, both the first and second bearings can be configured as roller bearings. Typically, such bearings may include inner and outer ring raceways that define guide grooves for receiving and guiding rolling elements, such as ball or cylindrical elements. In the installed state, i.e., during operation, the load acting on the load element of the roller bearing can be specified by an effective force line, as explained above, which indicates the direction of the cumulative load acting on the rolling element of the roller bearing.

[0244] In the proposed gearbox, the first and second bearings can be configured such that the effective force line of the first bearing, which indicates the direction of the load acting on its rolling elements, is substantially parallel to the effective force line of the second bearing, which indicates the direction of the load acting on its rolling elements. Alternatively, the first and second bearings can be configured such that the effective force lines of both bearings are arranged in a plane, i.e., a common plane. Specifically, the plane can be arranged substantially perpendicular to the axial direction.

[0245] Specifically, at least one of the first and second bearings can be a radial ball bearing, a spherical roller bearing, and a cylindrical roller bearing, particularly an NJ-designed cylindrical roller bearing. For example, in one configuration, the first bearing can be a radial ball bearing or a spherical roller bearing, wherein the second bearing can be a cylindrical roller bearing, particularly an NJ-designed cylindrical roller bearing.

[0246] The first bearing can be directly attached to the sun gear of the planetary gear assembly. Specifically, the first bearing, i.e., its inner ring raceway, can be positioned on the circumferential outer surface of the sun gear, i.e., on its shaft. Alternatively, the first bearing can be attached to a retaining member of the gearbox that holds the sun gear, i.e., the sun gear is fixedly mounted to the retaining member. In this configuration, the sun gear can be rotatably supported within the gearbox via or by means of the retaining member. Therefore, the first bearing can be directly attached to the retaining member, for example, attached to its circumferential outer surface. For example, the retaining element can be an actuable shaft of the gearbox, which can be torque-transmitted to the drive shaft of the motor unit of the drive unit. More specifically, the actuable shaft can constitute the input shaft of the gearbox. Alternatively, the actuable shaft can constitute an intermediate shaft of the gearbox, which interconnects the sun gear and the input shaft of the gearbox in a torque-transmitting manner.

[0247] Therefore, the sun gear can be fastened, for example, securely mounted to the actuating shaft, particularly by form-fit and / or force-fit. Preferably, the sun gear is connected to the actuating shaft such that the longitudinal or rotational axis of the sun gear coincides with the longitudinal or rotational axis of the actuating shaft. A first bearing can be attached to the actuating shaft, for example, to its outer surface. In this way, the actuating shaft, together with the sun gear fastened thereto, can be rotatably supported in the gearbox.

[0248] To rotatably support the sun gear and optional actuable shaft within the gearbox, at least one additional first bearing may be provided. This additional first bearing may be provided in the form of at least one of a radial ball bearing and a NU-designed cylindrical bearing. The first bearing and the additional first bearing may constitute a floating bearing for rotatably supporting the sun gear and optional actuable shaft within the gearbox.

[0249] In another development, the planetary gear carrier can be rotatably supported in the gearbox by means of at least one additional second bearing. This second bearing can be a tapered roller bearing, particularly a double-row tapered roller bearing. The second bearing and the additional second bearing can be arranged on opposite sides of the planetary gears relative to the planetary gear assembly. Specifically, the second bearing and the additional second bearing can be arranged on opposite sides of the planetary gears along the axial direction of the planetary gear assembly.

[0250] Alternatively or additionally, the planetary gear carrier may be provided with a support element, particularly a hollow cylindrical support element, to which at least one of a first bearing or a second bearing is mounted, particularly directly. The first bearing may be mounted to the inner surface of the support element, particularly the circumferential inner surface, or the outer surface, particularly the circumferential outer surface. Furthermore, the second bearing may be mounted to either the inner or outer surface of the support element. For example, the first bearing may be mounted to the inner surface of the support element, while the second bearing may be mounted to the outer surface of the support element. Alternatively, the second bearing may be mounted to the inner surface of the support element, while the first bearing may be mounted to the outer surface of the support element.

[0251] According to one configuration, a first bearing can be inserted between the sun gear or actuable shaft and the planetary gear carrier. Specifically, the first bearing can be fastened, particularly directly to the sun gear or actuable shaft, especially its outer surface, and fastened to the planetary gear carrier. Furthermore, a second bearing can be inserted between the planetary gear carrier and the gearbox housing. Specifically, the second bearing can be fastened, particularly directly to the planetary gear carrier, especially its outer surface, and fastened to the gearbox housing, especially its inner surface. In this configuration, the first bearing can be mounted to the inner surface of the support element, and the second bearing can be mounted to the outer surface of the support element.

[0252] In another development, the sun gear or actuable shaft may be provided with another support element in the shape of a hollow cylinder, with at least one of a first bearing and a second bearing mounted on, particularly directly mounted, the other support element in the shape of a hollow cylinder. The first bearing may be mounted to the inner surface of the other support element, particularly the circumferential inner surface, or the outer surface, particularly the circumferential outer surface. Furthermore, the second bearing may be mounted to either the inner or outer surface of the other support element. For example, the first bearing may be mounted to the inner surface of the other support element, while the second bearing may be mounted to the outer surface of the other support element. Alternatively, the second bearing may be mounted to the inner surface of the other support element, while the first bearing may be mounted to the outer surface of the other support element.

[0253] According to another configuration, a first bearing can be inserted between another support element and the gearbox housing. Specifically, the first bearing can be fastened, particularly directly, to the other support element, especially its outer surface, and to the housing, particularly its inner surface. Furthermore, a second bearing can be inserted between the other support element and the planetary gear carrier, particularly its support element. Specifically, the second bearing can be fastened, particularly directly, to the other support element, particularly its inner surface, and to the planetary gear carrier, particularly to the outer surface of its support element. In this configuration, the first bearing can be mounted to the outer surface of the other support element, while the second bearing can be mounted to the inner surface of the other support element.

[0254] Furthermore, a drive unit for a mining machine, including a gearbox as described above, can be provided. Therefore, the technical features described in conjunction with the gearbox can also be related to and applied to the drive unit.

[0255] To address the goal of providing an improved gearbox, one of the following items can be provided:

[0256] 1. A gearbox (16) for a mining machine drive unit (12) having a planetary gear assembly (122) comprising a sun gear (128) rotatably supported in the gearbox (16) by means of a first bearing (74) and a planetary gear carrier (126) rotatably supported in the gearbox (16) by means of a second bearing (140), wherein the first bearing and the second bearing (74, 140) at least partially overlap in the axial direction (A) of the planetary gear assembly (122).

[0257] 2. The gearbox according to Project 1, wherein the gearbox (16) is an in-line planetary gearbox, wherein the input shaft (72) and output shaft (22) of the gearbox (16) are arranged parallel to each other, or the gearbox is a bevel planetary gearbox, wherein the input shaft (16) and output shaft (22) of the gearbox (16) are arranged perpendicular to each other.

[0258] 3. Gearbox according to Project 1 or 2, wherein the first bearing and the second bearing (74, 140) are arranged coaxially.

[0259] 4. A gearbox according to any one of items 1 to 3, wherein the first bearing and the second bearing (74, 140) are roller bearings, and wherein the effective force lines of the first bearing and the second bearing (74, 140) indicating the load direction acting on their rolling elements are arranged in a plane (P), the plane being particularly perpendicular to the axial direction (A).

[0260] 5. The gearbox according to any one of items 1 to 4, wherein the first bearing (74) is a radial ball bearing or a spherical roller bearing, and wherein the second bearing (140) is a cylindrical roller bearing.

[0261] 6. A gearbox according to any one of items 1 to 5, wherein the sun gear (128) is fastened to an actuated shaft (72; 154) of the gearbox (16), and wherein the first bearing (74) is attached to the outer surface of the actuated shaft (72; 154).

[0262] 7. A gearbox according to any one of items 1 to 6, wherein the sun gear (128) is rotatably supported in the gearbox (16) by means of at least one other first bearing (76; 156, 158) provided in the form of a radial ball bearing (76; 158) or a cylindrical roller bearing (156).

[0263] 8. A gearbox according to any one of items 1 to 7, wherein the planetary gear carrier (126) is rotatably supported in the gearbox (16) by means of another second bearing (142), particularly in the form of a double-row tapered roller bearing, and wherein the second bearing and the other second bearing (140, 142) are arranged on opposite sides relative to the planetary gear (124) of the planetary gear assembly (122).

[0264] 9. A gearbox according to any one of items 1 to 8, wherein the planetary gear carrier (126) is provided with a hollow cylindrical support element (152), and at least one of the first bearing and the second bearing (74, 140) is mounted on the support element.

[0265] 10. A gearbox according to any one of items 1 to 9, wherein the first bearing (74) is inserted between the planetary gear carrier (126) and the sun gear (128), and wherein the second bearing (140) is inserted between the planetary gear carrier (126) and the housing (132) of the gearbox (16).

[0266] 11. The gearbox according to items 9 and 10, wherein the first bearing (74) is mounted to the inner surface of the support element (152) and the second bearing (140) is mounted to the outer surface of the support element (152).

[0267] 12. A gearbox according to any one of items 1 to 11, wherein the sun gear or the actuating shaft (154) is provided with another support element (170) in the shape of a hollow cylindrical shape, and at least one of the first bearing and the second bearing (74, 140) is mounted to the other support element in the shape of a hollow cylindrical shape.

[0268] 13. The gearbox according to item 12, wherein the first bearing (74) is inserted between the other support element (170) and the housing (132) of the gearbox (16), and wherein the second bearing (140) is inserted between the other support element (170) and the planetary gear carrier (126).

[0269] 14. The gearbox according to item 12 or 13, wherein the first bearing (74) is mounted to the outer surface of the other support element (170), and the second bearing (140) is mounted to the inner surface of the other support element (170).

[0270] 15. A drive unit (12) for a mining machine, comprising a gearbox (16) according to any one of items 1 to 13.

[0271] Another aspect of this disclosure relates to a coupling flange in a drive unit for a mining machine, which is used to structurally connect a motor unit to a gearbox, and to a drive unit equipped with such a coupling flange.

[0272] As mentioned above, mining machines, particularly longwall mining machines, are equipped with multiple drive units for actuating or driving operating equipment (such as conveyors, cutters, or other driven components, i.e., traction chain drive units). Typically, the drive units used in mining machines can be designed in a modular fashion to increase their reusability and standardization between and within such machines. This modular design of the drive units may include a high-performance motor unit, i.e., an electric motor, to which a gearbox is coupled. The gearbox serves to introduce the high transmission power of the electric motor into the drive shaft of the driven equipment, such as a sprocket.

[0273] In underground mining, so-called Controlled Start Transmission (CST) drive systems with modular designs are known to be used. These modular designs can adapt to different installation conditions, thus providing a degree of configurability. For example, known CST drive systems allow the motor and gearbox to be arranged in different spatial arrangements, particularly with rotational offsets relative to each other.

[0274] Typically, such drive units are composed of components from different manufacturers. This allows gearboxes designed for underground mining applications to meet specific requirements to be combined with different, particularly commonly used, motor units. Therefore, it is common practice for the motor units and gearboxes to be supplied by different manufacturers and then assembled into drive units at the mining machine manufacturing site.

[0275] However, providing proper connections between these components, which are manufactured by different companies, can be time-consuming and expensive, i.e., to allow the motor unit and gearbox to be arranged at different angular positions relative to each other.

[0276] To further consider this aspect, an objective could be to provide an improved structural connection between the motor unit and the gearbox within the drive unit, which would particularly help increase the configurability of the drive unit. Furthermore, an objective could be to provide drive units employing this structural connection.

[0277] Therefore, a connecting flange for the drive unit, particularly for use in mining machines, can be provided, wherein the connecting flange is configured to structurally connect the motor unit and the gearbox relative to each other in at least two different spatial arrangements. The connecting flange can be designed and configured such that, in the different spatial arrangements, the motor unit and the gearbox are rotated and offset relative to each other. In other words, by means of the connecting flange, the motor unit and the gearbox can be structurally connected to each other such that the angular position or orientation between the two components differs between the different spatial arrangements. For example, the connecting flange can be designed and configured such that, in a first assembled state, the motor unit and the gearbox are connected to the connecting flange in a first spatial arrangement, and in a second assembled state, with respect to or relative to a second spatial arrangement, the motor unit and the gearbox are rotated and offset relative to each other.

[0278] The proposed solution provides a connecting flange that forms an adapter, allowing the motor unit and gearbox to be suitably connected within the drive unit. To this end, the connecting flange allows the motor unit and gearbox to be positioned in different spatial arrangements, i.e., at different angular orientations relative to each other, thereby increasing the configurability of the drive unit. Thus, when used in a drive system, the proposed solution can help meet the requirements of CST systems.

[0279] It should be noted that the proposed connecting flange can be combined with the previously described gearbox, motor unit, and drive unit. Therefore, the technical features described in conjunction with the previously described gearbox, motor unit, and drive unit can also be related to and applied to the connecting flange.

[0280] The proposed connecting flange can be designed and configured for use in the drive unit of a mining machine (e.g., an underground mining machine, such as a longwall mining machine). Such a drive unit is preferably used to drive operating equipment, such as a conveyor, cutter, or other driven parts of a mining machine, but is not limited to this application.

[0281] This drive unit may further include at least one of a motor unit and a gearbox. The motor unit may include a frequency converter and a motor. Specifically, the motor may be provided in the form of a synchronous machine powered by an inverter equipped with permanent magnets. The motor unit may include a motor shaft, which may be connected to the input shaft of the gearbox, for example, directly or via a clutch, in a torque transmission manner. Thus, the actuating torque generated by the motor unit can be introduced into the gearbox. The gearbox may be configured to provide speed and torque conversion from its actuated input shaft to its output shaft. For this purpose, the gearbox may be a planetary gear train, which may include at least one planetary gear assembly. Furthermore, the drive unit may include a clutch that can be inserted between the motor unit and the gearbox. In the context of this disclosure, gearbox or motor unit may refer to the assembly surrounding the clutch.

[0282] The basic structural configuration and characteristics of the motor unit and gearbox are well known to those skilled in the art and therefore are not described in further detail. Instead, the characteristics and technical features of the connecting flanges that are related to aspects of this disclosure are discussed below.

[0283] The proposed connecting flange can be a separate component of the drive unit, i.e., not integrally formed with any other component of the gearbox, motor unit, or drive unit. Therefore, the connecting flange can be readily and cost-effectively provided. In practice, this allows the connecting flange to be designed and manufactured for a specific configuration of the drive unit, particularly with regard to its motor unit or gearbox. In other words, the proposed connecting flange constitutes an adapter for connecting the motor unit to the gearbox within the drive unit, and can be designed for specific components. This means that the connecting flange can be associated with at least one of a specific motor unit or a specific gearbox. Therefore, the connecting flange can be associated with a specific combination of gearbox and motor unit.

[0284] The connecting flanges can be configured to be interchangeable within the drive unit. This allows for the exchange of connecting flanges when changing or replacing gearbox or motor units within the drive unit, ensuring proper connection between components.

[0285] Alternatively or additionally, the coupling flange can be configured to suit different components of the drive unit, particularly different motor units or gearboxes. For this purpose, the coupling flange may include interchangeable coupling components associated with different gearboxes or different motor units. Such coupling components can be interchangeably attached to the coupling flange, thereby providing its modular design. For example, such a component may be an interface structure of the coupling flange having a predetermined first coupling member and a predetermined second coupling member, the predetermined first coupling member being designed to complement and releasably engage with the base structure of the coupling flange, and the predetermined second coupling member being designed to complement and releasably engage with a structural interface located at the gearbox or motor unit.

[0286] Alternatively or additionally, the coupling flange can be configured to connect to different types of gearboxes or motor units. For this purpose, the coupling flange can be provided with different types of interface elements associated with different gearboxes or motor units. For example, the coupling flange may include: a first set of interface elements associated with and thus configured to connect to a first type of gearbox or motor unit; and a second set of interface elements associated with and thus configured to connect to a second type of gearbox or motor unit. In this configuration, the interface elements included in the first set may be at least partially different from the interface elements included in the second set.

[0287] As explained above, the motor unit and gearbox are connected to each other in a torque transmission manner, such that the actuating torque applied to the motor shaft of the motor unit can be introduced into the gearbox specifically via the input shaft of the gearbox. For this purpose, the motor unit and gearbox can be interconnected by a drive shaft. The drive shaft can be rotatably supported in the drive unit, allowing it to rotate relative to the gearbox (i.e., its housing), the motor unit (i.e., its housing), and the connecting flange. Specifically, the drive shaft can be formed from at least one of the input shaft of the gearbox and the motor shaft of the motor unit. Alternatively, the drive shaft can constitute an intermediate shaft that interconnects the input shaft of the gearbox and the motor shaft of the motor unit in a torque transmission manner.

[0288] To interconnect the motor unit and gearbox, the connecting flange can be configured such that, in the assembled state of the drive unit with the motor unit and gearbox fixed to the connecting flange, the connecting flange can be inserted between the motor unit and the gearbox. In this configuration, the connecting flange can be configured to receive or enclose the drive shaft of the interconnecting gearbox (particularly its input shaft) and the motor unit (particularly its motor shaft) in a torque transmission manner. For this purpose, the connecting flange can be provided with a through opening or a channel opening. The through opening can be configured such that, in the assembled state of the drive unit, the drive shaft is at least partially received therein or extends through it.

[0289] More specifically, the through opening may extend through the connecting flange along its longitudinal axis. In the assembled state of the drive unit, the longitudinal axis of the connecting flange may be arranged parallel to or coincide with the longitudinal axis of at least one of the motor unit and the gearbox. Specifically, in the assembled state of the drive unit, the longitudinal axis of the connecting flange may be arranged parallel to or coincide with the longitudinal or rotational axis of the drive shaft. Therefore, in the assembled state of the drive unit, the longitudinal axis of the connecting flange may be arranged parallel to or coincide with at least one of the longitudinal or rotational axis of the input shaft of the gearbox and the longitudinal or rotational axis of the motor shaft of the motor unit.

[0290] In another development, the connecting flange can be configured such that, in different spatial arrangements, the longitudinal axis of the connecting flange can coincide with the longitudinal or rotational axis of the drive shaft. In other words, in each of the different spatial arrangements of the gearbox and motor housing, the longitudinal axis of the connecting flange can coincide with the longitudinal or rotational axis of the drive shaft.

[0291] Furthermore, the connecting flange can be configured such that in the first assembly state described above, the motor unit and the gearbox are connected to the connecting flange in a first spatial arrangement, and in relation to or relative to a second assembly state in which the motor unit and the gearbox are connected to the connecting flange in a second spatial arrangement, the gearbox rotates or pivots relative to the motor unit about the longitudinal axis of the connecting flange.

[0292] Specifically, the connecting flange can be configured such that, in a first assembled state, the motor unit rotates about a certain degree relative to the gearbox about the longitudinal axis of the connecting flange with respect to a second assembled state, particularly between 1° and 180°. For example, in the first assembled state, the gearbox can rotate about approximately 90° or 180° relative to the motor unit about the longitudinal axis of the connecting flange with respect to the second assembled state. Alternatively, the connecting flange can be configured such that, in the first assembled state, the gearbox rotates about approximately 30°, 45°, 60°, 120°, 135°, or 150° relative to the motor unit about the longitudinal axis with respect to the second assembled state.

[0293] The connecting flange can be configured to structurally connect the motor unit and the gearbox to each other, forming more than two different spatial arrangements relative to each other. In this configuration, the connecting flange can be configured such that when the motor unit and the gearbox are arranged in any of the different spatial arrangements, the gearbox rotates about a predetermined degree, for example, about 90°, about a longitudinal axis relative to the motor unit about at least one of the other spatial arrangements. For example, the connecting flange can be configured to structurally connect the gearbox and the motor unit to each other, forming four different spatial arrangements relative to each other. In this configuration, the connecting flange can be configured such that when the motor unit and the gearbox are connected to the connecting flange in a first spatial arrangement, the motor unit and the gearbox can rotate about a certain degree, for example, about 90° or less, about a longitudinal axis about a second spatial arrangement about the motor unit and the gearbox about the longitudinal axis about the motor unit and the gearbox about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the second spatial arrangement about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the second spatial arrangement about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the longitudinal axis about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the longitudinal axis about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the first spatial arrangement about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement about the longitudinal axis about the first spatial arrangement about the second spatial arrangement about the motor unit and the gearbox about the second spatial arrangement ... third spatial Furthermore, when the gearbox and motor unit are connected to the connecting flange in a third spatial arrangement, the motor unit and gearbox can rotate relative to each other about a certain degree about both the second and fourth spatial arrangements around the longitudinal axis. Therefore, in the case of a certain degree of 90°, when the motor unit and gearbox are connected to the connecting flange in a fourth spatial arrangement, the motor unit and gearbox can rotate relative to each other about a certain degree about both the third and first spatial arrangements around the longitudinal axis.

[0294] Specifically, the connecting flange can be configured to hold the motor unit in at least two different mounting positions. In other words, the motor unit can be structurally connected or securely fixed to the connecting flange in at least two different mounting positions, particularly preventing rotational movement of the motor unit relative to the connecting flange. Specifically, the connecting flange can be configured such that the motor unit is rotated and offset relative to the connecting flange in different mounting positions. In other words, when comparing two different assembly states of the drive unit, where the mounting positions of the motor unit relative to the connecting flange are different, the motor unit is rotated and offset relative to the connecting flange. Specifically, the connecting flange can be configured such that in a first mounting state, the motor unit is connected to the connecting flange in a first mounting position, and the motor unit can be rotated and offset relative to the connecting flange in a second mounting state, relative to a second mounting position where the motor unit is connected to the connecting flange.

[0295] More specifically, the connecting flange can be configured such that, in the first mounting state, the motor unit rotates about its longitudinal axis relative to the connecting flange with respect to the second mounting state. For example, the connecting flange can be configured such that, in the first mounting state, the motor unit rotates about its longitudinal axis relative to the connecting flange with respect to the second mounting state by approximately a certain degree, such as approximately 90° or 180°. Alternatively, the connecting flange can be configured such that, in the first mounting state, the motor unit rotates about approximately 30°, 45°, 60°, 120°, 135°, or 150° with respect to the connecting flange with respect to the second mounting state.

[0296] In another development, the connecting flange can be configured to restrict the connection between the motor unit and the connecting flange to at least two distinct mounting positions, in each of which the relative orientation between the motor unit and the connecting flange is predefined. In this configuration, the two distinct mounting positions constitute predetermined locations for connecting the motor unit to the connecting flange. In other words, this configuration prevents the motor unit from being connected to the connecting flange in any location other than the predetermined at least two distinct mounting positions, such as four distinct mounting positions.

[0297] Furthermore, the connecting flange can be configured to hold the gearbox in a predetermined mounting position. Specifically, the connecting flange can be configured to restrict the engagement of the gearbox with the connecting flange to a single mounting position, wherein the relative rotation between the gearbox and the connecting flange is predefined. In other words, the gearbox can be structurally engaged or securely fixed to the connecting flange only in a single mounting position, and in particular, rotational movement of the gearbox relative to the connecting flange is prevented. This configuration prevents the gearbox from being engaged with the connecting flange in any position other than the predetermined single mounting position.

[0298] Alternatively, the connecting flange can be configured to hold the gearbox in at least two different mounting positions. In other words, the gearbox can be structurally coupled or securely fixed to the connecting flange in at least two different mounting positions, particularly preventing rotational movement of the gearbox relative to the connecting flange. Specifically, the connecting flange can be configured such that the gearbox is rotated and offset relative to the connecting flange in different mounting positions. In other words, when comparing two different assembly states of the drive unit, where the mounting positions of the gearbox relative to the connecting flange are different, the gearbox is rotated and offset relative to the connecting flange. Specifically, the connecting flange can be configured such that in a first mounting state, the gearbox is coupled to the connecting flange in a first mounting position, and the gearbox is rotated and offset relative to the connecting flange in a second mounting state with respect to the connecting flange. More specifically, the connecting flange can be configured such that in the first mounting state, the gearbox rotates about a longitudinal axis relative to the connecting flange with respect to the second mounting state. For example, the connecting flange can be configured such that, in a first mounting state, the gearbox rotates about a certain degree relative to the connecting flange about its longitudinal axis with respect to a second mounting state, for example, about 90° or 180°. Alternatively, the connecting flange can be configured such that, in the first mounting state, the gearbox rotates about approximately 30°, 45°, 60°, 120°, 135°, or 150° relative to the connecting flange about its longitudinal axis with respect to the connecting flange with respect to a second mounting state. In another development, the connecting flange can be configured to restrict the engagement of the gearbox to the connecting flange to at least two different mounting positions, in each of which the relative orientation between the gearbox and the connecting flange is predefined. In this configuration, the two different mounting positions can constitute predetermined positions for engaging the gearbox to the connecting flange. In other words, this configuration prevents the gearbox from engaging to the connecting flange in any position other than the predefined at least two different mounting positions.

[0299] When the connecting flange is configured to restrict the connection of both the motor unit and the gearbox to a single mounting position, the connecting flange can be configured to adjust the relative rotational orientation between the motor unit and the gearbox. For this purpose, the connecting flange may, for example, be provided with a first gearbox-side interface for structurally connecting the gearbox to the connecting flange, and a motor unit-side interface for structurally connecting the motor unit to the connecting flange, wherein the gearbox-side interface and the motor unit-side interface can be rotatably offset relative to each other, particularly about the longitudinal axis, so that the motor unit and the gearbox can be spatially arranged and connected to the connecting flange.

[0300] The connecting flange may include a motor unit-side end via which the motor unit can be connected. Specifically, the motor unit-side end may form a motor unit-side interface. With the motor unit connected to the connecting flange, the motor unit-side end or interface may engage or abut with the motor unit, particularly its complementary interface. Furthermore, the motor unit-side end may include a plurality of first interface elements for structurally connecting the motor unit and the connecting flange. The first interface elements may be at least one of connecting elements, such as connecting bolts or screws, and through holes for receiving and engaging connecting elements. Additionally, the interface elements may include the profile of the motor unit-side end, which may be configured to engage with a complementary recess located on the motor unit, thereby formally connecting the connecting flange to the motor unit, particularly for aligning the motor unit relative to the connecting flange.

[0301] As explained above, the connecting flange can be configured to hold the motor unit in at least two different mounting positions. For this purpose, a plurality of first interface elements can be provided to enable the motor unit to be connected to the connecting flange in at least two different mounting positions. To this end, the plurality of first interface elements in the cross-sectional profile can form a regular pattern of interface elements. This regular pattern can be divided into or comprise multiple congruent portions, for example, having at least two different first interface elements. The number of congruent portions can correspond to the number of different mounting positions of the motor unit at the connecting flange. The congruent portions can be rotated and offset relative to each other about the longitudinal axis of the connecting flange. Furthermore, the congruent portions can be divided into at least two lines that are perpendicular and intersect at the longitudinal axis of the connecting flange. The two lines can be arranged regularly about the longitudinal axis.

[0302] Alternatively or additionally, the plurality of first interface elements can be arranged such that, in the cross-sectional profile at the motor unit side end, the plurality of first interface elements are arranged rotationally symmetrically about a longitudinal axis. Specifically, the cross-sectional profile may be perpendicular to the longitudinal axis. This configuration ensures that the motor unit can be secured to the coupling flange in at least two or four or more novel positions. Alternatively or additionally, the plurality of first interface elements can be arranged such that, in the cross-sectional profile at the motor unit side end, the plurality of first interface elements are arranged in a mirror-symmetrical manner with respect to a first mirror line perpendicular to the longitudinal axis and a second mirror line perpendicular to both the longitudinal axis and the first mirror line. The first and second mirror lines may intersect at the longitudinal axis.

[0303] Furthermore, the connecting flange may include a gearbox-side end through which the gearbox can be connected to the connecting flange. The gearbox-side end may be arranged opposite to the motor unit-side end, particularly along the longitudinal axis. Specifically, the gearbox-side end may constitute a gearbox-side interface. With the gearbox connected to the connecting flange, the gearbox-side end or interface may engage or abut with the gearbox, i.e., its complementary design interface. Furthermore, the gearbox-side end may include a plurality of second interface elements for structurally connecting the gearbox to the connecting flange. The second interface elements may be at least one of connecting elements, such as connecting bolts or screws, and through holes for receiving and engaging connecting elements. Additionally, the interface elements may include a profile of the gearbox-side end, which may be configured to engage with a complementary design connector provided at the motor unit, thereby connecting the connecting flange to the gearbox formwork, particularly for aligning the gearbox relative to the connecting flange.

[0304] As explained above, the connecting flange can be configured to restrict the connection between the gearbox and the connecting flange to a single mounting position. Therefore, multiple second interface elements can be provided so that the gearbox can be connected to only one single mounting position in the connecting flange. For this purpose, the multiple second interface elements can be arranged such that, in the cross-sectional profile at the motor unit side end, they are non-mirror symmetrical about at least one of a first line perpendicular to the longitudinal axis and a second line perpendicular to both the longitudinal axis and the first mirror line.

[0305] When the connecting flange is configured to restrict the connection between the gearbox and the connecting flange to at least two different mounting positions, the second interface element can be designed similarly to or correspondingly to the first interface element described above. Therefore, when the connecting flange is configured to restrict the connection between the motor unit and the connecting flange to a single mounting position, the first interface element can be designed similarly to or correspondingly to the second interface element described above.

[0306] Furthermore, a drive unit can be provided, particularly for mining machines, such as underground mining machines, like longwall mining machines, equipped with a gearbox and a motor unit. In the drive unit, the gearbox and motor unit can be structurally interconnected by means of the connecting flange described above. Since the proposed drive unit is equipped with the aforementioned connecting flange, the technical features described in this disclosure in conjunction with the connecting flange can also be related to and applied to the proposed drive unit, and vice versa.

[0307] To address the need for improved connectivity between components within the drive unit, the following items can be provided:

[0308] 1. A connecting flange (170) for a drive unit (12) of a mining machine, the connecting flange being configured to structurally connect a motor unit (14) and a gearbox (16) arranged in at least two different spaces relative to each other, wherein the motor unit (14) and the gearbox (16) are arranged to rotate offset relative to each other.

[0309] 2. According to the connecting flange of item 1, it is configured such that in a first assembly state, the motor unit (14) and the gearbox (16) are connected to the connecting flange (170) in a first spatial arrangement, and in a second assembly state in which the motor unit (14) and the gearbox (16) are connected to the connecting flange (170) in a second spatial arrangement, the motor unit (14) and the gearbox (16) are rotated offset relative to each other.

[0310] 3. According to item 1 or 2, the connecting flange is provided with a through opening (172) and is designed such that the drive shaft of the motor unit (14) and the gearbox (16) interconnected in a torque transmission manner is accommodated in the through opening (172) when the motor unit (14) and the gearbox (16) are connected to the connecting flange (170) in the assembled state.

[0311] 4. According to the connecting flange of item 3, it is configured such that when arranged in any of the different spatial arrangements, the longitudinal axis (L) of the connecting flange (170) coincides with the rotation axis of the drive shaft.

[0312] 5. According to any one of items 2 to 4, the connecting flange is configured such that, in the first assembled state, the motor unit (14) rotates relative to the gearbox (16) about the longitudinal axis (L) of the connecting flange (170) with respect to the second assembled state.

[0313] 6. According to any one of items 2 to 5, the connecting flange is configured such that, in the first assembled state, the motor unit (14) rotates about 90° or 180° relative to the gearbox (16) about the longitudinal axis (L) of the connecting flange (170) with respect to the second assembled state.

[0314] 7. A connecting flange according to any one of items 1 to 6, which is configured to hold the motor unit (14) in at least two different mounting positions, wherein the motor unit (14) is rotatably offset relative to the connecting flange (170).

[0315] 8. A connecting flange according to any one of items 1 to 7, wherein in a first mounting state, the motor unit (14) is connected to the connecting flange (170) at a first mounting position, and the motor unit is rotated and offset relative to the connecting flange (170) in a second mounting state in which the motor unit (14) is connected to the connecting flange (170) at a second mounting position.

[0316] 9. According to item 8, the connecting flange is configured such that in the first mounting state, the motor unit (14) rotates relative to the connecting flange (170) about the longitudinal axis (L) of the connecting flange (170) with respect to the second mounting state, particularly by about 90° or 180°.

[0317] 10. A connecting flange according to any one of items 1 to 9 is configured to restrict the connection between the motor unit (14) and the connecting flange (170) to at least two mounting positions, wherein in each mounting position the relative orientation between the motor unit (14) and the connecting flange (170) is predefined.

[0318] 11. A connecting flange according to any one of items 1 to 10, configured to restrict the connection between the gearbox (16) and the connecting flange (170) to a single mounting position, wherein the relative orientation between the gearbox (16) and the connecting flange (170) is predefined.

[0319] 12. A connecting flange according to any one of items 1 to 11, comprising a motor unit side end (174) having a plurality of first interface elements (178, 180) for connecting the motor unit (14) to the connecting flange (170) structure, wherein in the cross-sectional profile of the motor unit side end (174), the plurality of first interface elements (178, 180) form a regular pattern of interface elements, the interface elements comprising at least two congruent portions (182a-d) that are rotated offset relative to each other about the longitudinal axis (L) of the connecting flange (170).

[0320] 13. According to any one of items 1 to 12, wherein in the cross-sectional profile of the motor unit side end (174), the plurality of first interface elements (178, 180) are arranged rotationally symmetrically about the longitudinal axis (L) of the connecting flange (170).

[0321] 14. A connecting flange according to any one of items 1 to 13, comprising a gearbox-side end (176) having a plurality of second interface elements (188, 190) for connecting the gearbox (16) to the connecting flange (170) structure, wherein in the cross-sectional profile of the gearbox-side end (176), the plurality of second interface elements (188, 190) are arranged asymmetrically about at least one of a first line (192) perpendicular to the longitudinal axis (L) of the connecting flange (170) and a second line (194) perpendicular to both the longitudinal axis (L) of the connecting flange (170) and the first line (192).

[0322] 15. A drive unit (12) for a mining machine. It includes a motor unit (14) and a gearbox (16) that are structurally interconnected by a connecting flange (170) according to any one of items 1 to 14.

[0323] Industrial applicability

[0324] Referring to the drawings, an electrical terminal assembly 26 and a drive unit assembly 10 for a mining machine equipped with such an electrical terminal assembly 26 are presented. The electrical terminal assembly 26 presented as described above is suitable for any drive unit arrangement. Furthermore, the proposed electrical terminal assembly 26 can replace conventional wiring systems and can serve as a replacement or retrofit component.

[0325] In addition, refer to the diagrams, especially Figures 17 to 19 The proposed gearbox 16 and a drive unit 12 of a mining machine equipped with such gearbox 16 are described above. The proposed gearbox 16 is suitable for the drive unit of a mining machine and can replace a conventional gearbox or be used as a replacement or modification part.

[0326] Furthermore, referring to the diagrams, especially Figures 20 to 23 A connecting flange 170 is proposed for connecting the motor unit 14 to the gearbox 16 in the drive unit of a mining machine. The connecting flange 170 proposed as described above is suitable for the drive unit of a mining machine and can replace conventional connecting parts or serve as a replacement or modification part.

Claims

1. An electrical terminal assembly (26) for a drive unit (12) of a mining machine, the electrical terminal assembly including a junction box (28) configured to be mounted to the drive unit (12) and a connection element (30) for communicatingly connecting the junction box to a control device of the drive unit (12), wherein the electrical terminal assembly (26) is configured to be interchangeably arranged in at least two different configurations, each of the configurations being associated with a different structural arrangement of the drive unit (12).

2. The electrical terminal assembly according to claim 1, wherein the junction box (28) includes or is connected to at least one sensor, the at least one sensor being configured to acquire data indicating operating conditions of the drive unit (12), and wherein the junction box (28) is configured to transmit the data acquired by the sensor to the control device via the connection element (30).

3. The electrical terminal assembly according to claim 2, wherein the junction box (28) includes a data acquisition device configured to acquire or process data obtained by the sensor, and then the data is forwarded to the control device via the connection element (30).

4. The electrical terminal assembly according to any one of claims 1 to 3, wherein the junction box (28) includes a first control port (36) and a second control port (38), each of the first control port and the second control port being configured to be detachably coupled to the connecting element (30).

5. The electrical terminal assembly according to claim 4, wherein the first control port (36) and the second control port (38) are disposed on opposite sides of the junction box (28).

6. The electrical terminal assembly according to claim 4 or 5, wherein the electrical terminal assembly is configured in a first configuration, wherein the connecting element (30) is coupled to the first control port (36), and in a second configuration, wherein the connecting element is coupled to the second control port (38).

7. The electrical terminal assembly according to any one of claims 1 to 6, the electrical terminal assembly further comprising a connection socket (35) disposed on the control device side of the electrical terminal assembly (26), the junction box (28) being communicatively connected to the connection socket via the connection element (30), wherein the connection socket (35) comprises a first connector (40) and a second connector (42), each of the first connector and the second connector being configured to be detachably coupled to the connection element (30).

8. The electrical terminal assembly according to claim 7, wherein the electrical terminal assembly is configured in a first configuration, wherein the connecting element (30) is coupled to the first connector (40), and in a second configuration, wherein the connecting element (30) is coupled to a second connector (42) of the connection socket (35).

9. The electrical terminal assembly according to any one of claims 1 to 8, wherein the junction box (28) includes a first sensor port (48) and a second sensor port (50), each of the first sensor port and the second sensor port being configured to be detachably coupled to sensor lines (44, 46, 56, 58) for receiving at least one of a sensor input or a sensor output.

10. The electrical terminal assembly according to claim 9, wherein the first sensor port (48) and the second sensor port (50) are disposed on opposite sides of the junction box (28).

11. The electrical terminal assembly according to claim 9 or 10, wherein the electrical terminal assembly is configured to be arranged in a first configuration, wherein, The sensor lines (44, 46); 44, 56) are connected to the first sensor port (48) and arranged in a second configuration, wherein the sensor lines (44, 46; 44, 56) are connected to the second sensor port (50).

12. The electrical terminal assembly according to any one of claims 1 to 11, the electrical terminal assembly further comprising a protective cover (64) having at least two shielding plates (66) configured to be variably connected to each other, wherein the protective cover (64) is configured to be interchangeably arranged in at least two different configurations, each of the configurations being associated with a different structural arrangement of the drive unit (12).

13. The electrical terminal assembly of claim 12, wherein at least one shielding plate (66) includes a first structural interface (68) and a second structural interface (70), each of the first structural interface and the second structural interface being configured to be detachably fastened to the other shielding plate (66), and wherein the electrical terminal assembly (26) is configured in a first configuration, wherein the first structural interface (68) is fastened to the other shielding plate (66), and in a second configuration, wherein the second structural interface (70) is fastened to the other shielding plate (66).

14. A drive unit arrangement (10) for use in a mining machine, the drive unit arrangement comprising a drive unit (12) and an electrical terminal assembly (26) according to any one of claims 1 to 13.

15. The drive unit arrangement according to claim 14, wherein the drive unit (12) is configured to be arranged in at least two different structural arrangements, wherein the relative arrangements between the motor unit (14) and the gearbox (16) are different.

Images