Drive device

Abstract

The utility model relates to a driving device which comprises a gear box and an electric machine connected to the gear box. The stator and the rotor are contained in the shell, the rotor is connected to a rotor shaft in a releasable mode, the rotor shaft is rotatably supported in the shell through bearings, the bearings comprise a first bearing arranged at the connecting position of the gearbox and the electric machine or close to the connecting position, and a sealing piece forming a seal between the gearbox and the electric machine is arranged close to the first bearing; the fixing part is arranged in the shell in a manner of being close to the rotor in a releasable manner, the fixing part is provided with a first position and a second position, the fixing part does not make contact with the rotor to avoid interfering with rotation of the rotor at the first position, and the fixing part is moved to the rotor to support the rotor and fix the rotor in the shell at the second position; the first bearing and / or the sealing member is moved out of the housing in a state in which the rotor is fixed in the housing via the fixing member. According to the utility model, the first bearing and / or the sealing element can be easily removed.

Description

Technical Field

[0001] The utility model relates to a driving device. Background Art

[0002] In the field of coal mining applications, scraper conveyors are usually used for coal mining, and the scraper conveyors are driven by driving devices. The driving device includes an electric motor and a gearbox driven by the electric motor. The electric motor generally uses a permanent magnet motor, which does not contain lubricating oil inside. The gearbox generally adopts multiple planetary stages, such as two planetary stages, and the gearbox contains lubricating oil for lubricating components such as bearings. A contact seal is provided on the high-speed shaft between the electric motor and the gearbox. This seal is easily damaged or aged due to contact with the high-speed rotating high-speed shaft, resulting in the leakage of the lubricating oil in the gearbox to the motor side. In addition, the bearings rotatably supporting the high-speed shaft are also easily damaged due to factors such as high temperature.

[0003] Therefore, it is necessary to frequently replace or repair the bearings and / or seals to avoid equipment failures. To replace or repair the bearings and / or seals, the electric motor needs to be separated from the gearbox to access the bearings and / or seals. The existing method is to remove the rotor of the electric motor from the motor housing, which requires a large amount of work and it is necessary to avoid contact between the rotor with magnets and other metal components because it is difficult to separate them again.

[0004] Therefore, it is necessary to design an improved driving device to solve one or more of the above technical defects. Summary of the Utility Model

[0005] To overcome at least one defect of the prior art, the utility model provides a driving device that is easy to replace or repair bearings and / or seals.

[0006] According to one aspect of the utility model, there is provided a driving device, comprising:

[0007] A gearbox;

[0008] An electric machine connected to the gearbox, the electric machine comprising:

[0009] A housing;

[0010] A stator accommodated in the housing;

[0011] A rotor accommodated in the housing, which is releasably connected to a rotor shaft, the rotor shaft being rotatably supported in the housing by bearings, the bearings including a first bearing provided at or near the connection between the gearbox and the electric machine, and a seal for forming a seal between the gearbox and the electric machine is provided near the first bearing; and

[0012] A fixing member is disposed near the rotor and releasably disposed within the housing. The fixing member has a first position and a second position. In the first position, the fixing member does not contact the rotor to avoid interfering with the rotation of the rotor. In the second position, the fixing member is moved to the rotor to support the rotor and fix the rotor within the housing, so that the first bearing and / or the seal can be removed from the housing in a state where the rotor is fixed within the housing via the fixing member.

[0013] According to an embodiment, the fixing member is connected to an operating member. The operating member includes an engaging portion and an operating portion. The engaging portion is positioned within a groove of the fixing member to longitudinally move the fixing member toward or away from the rotor during operation. The operating portion extends outward from the engaging portion and communicates to the outside of the electric machine.

[0014] According to an embodiment, the operating portion is formed as a rod shape and is threadedly engaged with a stationary component of the electric machine. The engaging portion is rotatably positioned within the groove and selectively pushes or pulls the fixing member when the operating portion rotates.

[0015] According to an embodiment, the fixing member has at least one of the following features:

[0016] The fixing member has an elongated hole extending in a direction corresponding to the circumference of the rotor, and / or, the fixing member has an adjusting portion on a side facing the rotor. The adjusting portion extends along the circumference to engage with the rotor to center the rotor; and

[0017] The fixing member fixes the rotor by a fastener or a fixture.

[0018] According to an embodiment, an installation wall is provided at an end of the housing opposite to the gearbox. The fixing member is releasably mounted to the installation wall directly or via an annular mounting plate. The fixing member is located between the rotor and the installation wall. The installation wall has an operation hole communicating the fixing member and the outside of the electric machine.

[0019] According to an embodiment, a braking system is provided between the rotor and the installation wall. The braking system includes a brake disc fixed to the rotor and one or more brakes fixed to the installation wall. The brakes are arranged in a direction corresponding to the circumference of the brake disc to engage with the brake disc to brake the rotor. The fixing member is disposed near the brakes.

[0020] According to an embodiment, a plurality of the fixing members and a plurality of the brakes are alternately fixed to the mounting plate in the circumferential direction. The mounting plate is releasably mounted to the installation wall.

[0021] According to one embodiment, the mounting wall is a flange connected to an end of the housing, and an end cover is provided at a position axially opposite to the rotor shaft on the flange.

[0022] According to one embodiment, the rotor is fixed to the rotor shaft via a rotor bracket. A support portion of the rotor bracket that supports the rotor is releasably connected to a removable portion that connects the support portion to the rotor shaft. After removing the removable portion, a removal space for removing the first bearing and / or the seal is formed between the support portion of the rotor bracket and the rotor shaft.

[0023] According to one embodiment, the rotor bracket includes a first bracket and a second bracket. The first bracket is fixed to the rotor shaft in a torque-transmitting manner as the removable portion, and the second bracket supports the rotor as the support portion. The first bracket is removably connected to the second bracket.

[0024] According to one embodiment, the first bracket includes a first bracket body that is annular and disposed around the rotor shaft, and a first connecting plate that extends radially outward from an outer surface of the first bracket body. The first connecting plate extends in the entire circumferential direction of the first bracket body or is arranged at intervals along the circumferential direction. The second bracket includes a second bracket body that is annular and supports the rotor from the radial inner side, and a second connecting plate that extends radially inward from an inner surface of the second bracket body. The second connecting plate extends in the entire circumferential direction of the second bracket body or is arranged at intervals along the circumferential direction. The first connecting plate is removably connected to the second connecting plate.

[0025] According to one embodiment, a partition is provided between the gearbox and the electric machine. The partition divides the interior of the drive device into a gearbox chamber and an electric machine chamber. The first bearing is supported between the partition and the rotor shaft via a bearing housing, and the bearing housing is removably connected to the partition.

[0026] According to one embodiment, a seal cover is mounted at an axial end of the bearing housing. The seal cover is inserted between the end of the bearing housing and the rotor shaft, and the seal is provided between the seal cover and the rotor shaft.

[0027] According to one embodiment, the drive device includes at least one of the following features:

[0028] The rotor shaft and the connected gearbox transmission shaft are formed as one body; and

[0029] The electric machine is a motor for a scraper conveyor

[0030] The present utility model sets a movable fixing member inside the motor housing. When it is necessary to replace or repair the first bearing and / or the seal, the fixing member can be moved to the rotor and the rotor can be fixed inside the motor housing without disassembling the rotor. Additionally, by releasably connecting the rotor and the rotor shaft, the first bearing and / or the seal can be removed from the circuit machine side while the rotor is kept fixed inside the motor housing. Description of the Drawings

[0031] Specific details of various embodiments of the present utility model are illustrated in the drawings and the following description. Based on these descriptions and illustrations, other features and advantages of the present utility model will be apparent.

[0032] Figure 1 is a schematic cross-sectional view of a driving device according to an embodiment of the present utility model.

[0033] Figure 2 is Figure 1 a schematic perspective view of the fixing member and the brake of the driving device shown.

[0034] Figure 3 is Figure 1 a partially enlarged view of the driving device shown.

[0035] Figure 4 is Figure 3 a partially enlarged view of the fixing member of the driving device shown. Detailed Description of the Embodiments

[0036] Specific embodiments and their variations according to the present utility model will be described in detail below with reference to the drawings.

[0037] For ease of description, the spatial relative terms "inside", "outside", "above", "below", "front", "rear", "left", "right", "top", "bottom", etc. are used herein to define the various components and their connection relationships. However, this is not restrictive. When the placement orientation of the components changes, these spatial relative relationships can also be reversed or changed without affecting the protection scope of the present utility model.

[0038] Figure 1 is a schematic cross-sectional view of a driving device according to an embodiment of the present utility model.

[0039] As Figure 1 shown, the driving device includes a gearbox 1 and a motor 2 integrated together. The gearbox 1 and the motor 2 are not two completely independent devices, but are highly integrated by sharing a part of the structure at the connection between the two (such as the partition 3 described later). The motor 2 is used to drive the gearbox 1, and then drive a working machine such as a scraper to perform operations.

[0040] The gearbox 1 can be a planetary gearbox, for example, having two or more planetary stages. The input shaft of the gearbox 1 driven by the motor 2 can share the same drive shaft with the rotor shaft 4 of the motor 2, so that the two form a single common shaft and are drivingly connected to other transmission components within the gearbox 1. However, the input shaft of the gearbox 1 and the rotor shaft 4 of the motor 2 can also be formed as two shafts (not shown) connected to each other in a torque-transmitting manner (e.g., by splines). The input shaft of the gearbox 1 and / or the rotor shaft 4 of the motor 2 is rotatably supported by bearings.

[0041] The gearbox 1 and the motor 2 can be separated in the axial direction by a partition 3, which extends substantially radially to a position close to the input shaft. The radially outer side of the partition 3 can be fixed (e.g., welded) to the gearbox housing 100 or the motor housing 200. The side of the partition 3 close to the gearbox 1 in the axial direction is a gearbox chamber for accommodating gearbox transmission components (e.g., planetary stages), and the opposite axial side is a motor chamber for accommodating motor components (e.g., stator and rotor). Thus, the gearbox 1 and the motor 2 are highly integrated together at their connection through the common partition 3, avoiding being connected together through their respective separate housings, thereby shortening the overall length of the drive device and making the structure compact. The partition 3 can be formed as a single plate or can be formed by connecting multiple plates (such as by welding) together.

[0042] A first bearing 5 for rotatably supporting the drive shaft of the drive device is provided at or near the position where the gearbox 1 and the motor 2 are connected to each other. The drive shaft can be the input shaft of the gearbox 1, or the rotor shaft 4 of the motor 2, or a single common shaft that serves as both the input shaft of the gearbox 1 and the rotor shaft 4 of the motor 2. To make the axial structure of the entire drive device more compact, the first bearing 5 can be provided on the radially inner side of the partition 3. The outer ring of the first bearing 5 can be fixed to the bearing seat 6, and the inner ring can be fixed to the drive shaft. The bearing seat 6 can be removably connected to the partition 3, for example, by fasteners such as bolts or by clamps. However, the bearing seat 6 can also be connected to other stationary components within the drive device.

[0043] The bearing seat 6 includes an annular body 61, which is arranged around the drive shaft and is provided on the radially inner side of the partition 3. For example, one end of the annular body 61 close to the gearbox 1 is axially inserted into the radially inner side of the partition 3, and a protrusion 62 (as shown) is provided circumferentially on the outer surface of the annular body 61 on the axial right side (i.e., the side close to the motor 2) at the insertion position. The protrusion 62 axially abuts against the side surface of the partition 3. The protrusion 62 can be formed as an annular extending in the entire circumference or can be formed as a plurality of circumferentially evenly spaced ones. Fasteners such as bolts can be provided on the protrusion 62 to fix the bearing seat 6 to the partition 3. Figure 3 shown), which axially abuts against the side surface of the partition 3. The protrusion 62 can be formed as an annular extending in the entire circumference or can be formed as a plurality of circumferentially evenly spaced ones. Fasteners such as bolts can be provided on the protrusion 62 to fix the bearing seat 6 to the partition 3.

[0044] Alternatively, it can be conceived that the annular main body 61 of the bearing seat 6 may not be inserted into the partition plate 3 either. That is, the end of the annular main body 61 may omit the part inserted into the partition plate 3 and terminate at the protruding portion 62, forming a substantially L-shaped end portion. Thus, the bearing seat 6 only contacts the partition plate 3 with the protruding portion 62 and is fixed.

[0045] One end of the bearing seat 6 away from the partition plate 3 can extend radially or substantially radially inwardly towards the transmission shaft to form a radially extending portion 63. The radially extending portion 63 can axially position the first bearing 5 (for example, axially abut against the outer ring of the first bearing 5) and together with the annular main body 61 of the bearing seat 6 form a space surrounding the first bearing 5. A radial gap is formed between the radially inner side of the radially extending portion 63 and the transmission shaft. As Figure 3 shown, a seal 7 can be provided within this radial gap to hermetically isolate the gearbox chamber from the motor chamber and prevent the lubricating oil in the gearbox 1 from leaking into the motor chamber. In this case, the bearing seat 6 serves as a holder for the seal 7.

[0046] Continuing to refer to Figure 3 , for the convenience of assembly, preferably, an annular seal cover 8 is inserted inside the bearing seat 6 radially, such that the seal cover 8 surrounds the transmission shaft and is located between the radially extending portion 63 of the bearing seat 6 and the transmission shaft. The seal 7 is provided between the seal cover 8 and the rotor shaft 4. Thus, the seal cover 8 serves as a holder for the seal 7. In the case where the seal cover 8 is provided, the above-mentioned radially extending portion 63 of the bearing seat 6 can also be omitted, and the seal cover 8 is provided between the annular main body 61 of the bearing seat 6 and the transmission shaft.

[0047] The seal cover 8 can be formed to have a substantially T-shaped longitudinal cross-section, including a small-diameter portion 81 and a large-diameter portion 82 located at one end of the small-diameter portion 81. The small-diameter portion 81 is inserted between the bearing seat 6 and the rotor shaft 4, and the large-diameter portion 82 axially abuts against the bearing seat 6 and is fixed to the bearing seat 6, for example, by fasteners or clamps. The seal 7 is provided between the radially inner surface of the seal cover 8 and the transmission shaft, preferably provided between the radially inner surface of the small-diameter portion 81 close to the gearbox side and the outer surface of the rotor shaft 4. This seal 7 is prone to aging and wear due to contact with the high-speed rotating rotor shaft 4 and the high-temperature lubricating oil. Therefore, it needs to be replaced or repaired regularly or as required.

[0048] As described above, the bearing seat 6 is removably fixed to the partition plate 3 or other stationary components between the gearbox 1 and the motor 2, and thus is removably fixed inside the driving device. The seal cover 8 is fixed to the bearing seat 6, and thus is also removably fixed inside the driving device. Thus, when it is necessary to replace or repair the first bearing 5 and / or the seal 7, the bearing seat 6 and / or the seal cover 8 can be disassembled from the inside of the driving device, so as to subsequently take out the first bearing 5 and / or the seal 7 from the motor side (which will be described in detail later).

[0049] The electric machine 2 includes an electric machine housing 200 and a stator 9 and a rotor 10 disposed within the electric machine housing 200. As Figure 3 shown, the rotor 10 can be disposed radially inward of the stator 9 and is rotatably supported by a rotor shaft 4 (i.e., a drive shaft) via a rotor bracket 11. The rotor bracket 11 is non-rotatably connected to the rotor shaft 4 to transmit torque. The rotor bracket 11 can be Figure 3 connected directly to the rotor shaft 4 as shown, or can be connected to the rotor shaft 4 via a bushing (not shown) fixed to the rotor shaft 4.

[0050] In Figure 3 the example shown, the rotor bracket 11 includes a first bracket 12 (removable part) and a second bracket 13 (support part) that are detachably connected to each other. The first bracket 12 can be detached from the second bracket 13 and can be removed from the electric machine side. After removing the first bracket 12, a removal space for subsequently removing the first bearing 5 and / or the seal 7 is formed between the second bracket 13 and the drive shaft, and the second bracket 13 remains within the electric machine housing 200.

[0051] The first bracket 12 includes a first bracket body 121 that is annular and disposed around the rotor shaft 4 and a first connecting plate 122 that extends radially outward from the outer surface of the first bracket body 121. The first connecting plate 122 can extend over the entire circumference of the first bracket body 121 or can be formed as a plurality of discrete connecting webs that are circumferentially spaced apart. The radially outer end of the first connecting plate 122 is connected to the second bracket 13. The second bracket 13 includes a second bracket body 131 that radially supports the rotor 10 from the inside and a second connecting plate 132 that extends radially inward from the inner surface of the second bracket body 131. The second connecting plate 132 is disposed radially opposite the first connecting plate 122 to connect the radially inner end of the second connecting plate 132 to the radially outer end of the first connecting plate 122.

[0052] To better support and position the second bracket 13 axially and radially, a stepped portion 123 can be provided on the radially outer end of the first connecting plate 122 of the first bracket 12 on the side closer to the gearbox 1. The stepped portion 123 can be provided over the entire circumference of the first connecting plate 122 to receive and support the corresponding end of the second connecting plate 132. The radially inner end of the second connecting plate 132 can be formed flat or can be provided with a protrusion 133 that extends axially from the radially inner end. The protrusion 133 can be Figure 1extends toward the step portion 123 as shown and is arranged on the step portion 123, or may extend in the opposite direction. The first connecting plate 122 and the second connecting plate 132 can be detachably connected at the corresponding ends by fasteners such as bolts, so that when it is necessary to replace or repair the first bearing 5 and / or the seal 7, the first bracket 12 can be separated from the second bracket 13 and then the first bracket 12 can be removed from the motor side.

[0053] Alternatively, the rotor bracket 11 can also be formed as an integral structure, which can be synchronously rotatably connected to the rotor shaft 4 through other components such as a bushing that rotates synchronously with the rotor shaft 4. In this case, the bushing or other components are detachably connected to the rotor bracket 11 so as to be removed from the motor side to form a removal space.

[0054] The motor housing 200 has a mounting wall at one end away from the gearbox 1. For example, a flange 14 is connected at this end. The flange 14 is formed in a ring shape and covers the end face of the cylindrical motor housing 200. The flange 14 is provided with an opening, and an end cover 15 is provided on the opening. The end cover 15 is axially opposite to the rotor shaft 4. When the rotor shaft 4 is rotatably supported by a second bearing 27 on the side close to the end cover 15, the end cover 15 can also be used as a bearing seat of the second bearing 27. One or more operation holes 151 can be provided on the end cover 15, and these operation holes 151 are respectively aligned with the connecting parts at the detachable positions of the rotor bracket 11, the bearing seat 6, and / or the seal cover 8, so as to operate the connecting parts from the outside of the end cover 15. However, when the end cover 15 is removed for operation, these operation holes 151 may not be provided on the end cover 15.

[0055] Inside the motor housing 200, a braking space is formed between the rotor 10 and the flange 14 (i.e., the mounting wall), and a braking system is provided in this braking space. The braking system includes a brake disc 16 fixed to the rotor 10 and one or more brakes 17 (as Figure 2 shown) for engaging or disengaging with the brake disc 16.

[0056] The brake disc 16 can be fixed to the axial end of the rotor bracket 11 by fasteners such as bolts or clamps. For example, the brake disc 16 can be formed as an annular disc shape, and its radially inner side is flush with the radially inner side of the annular second bracket body 131 of the second bracket 13 of the rotor bracket 11. One side surface of the brake disc 16 contacts the end face of the second bracket body 131, and the other side surface opposite to it axially is spaced from the brake 17.

[0057] The brake 17 includes a brake caliper that is movable to engage or disengage from the brake disc 16, and an actuator, such as a hydraulic actuator, that is connected to the brake caliper to actuate the movement of the brake caliper. The brake 17 is fixed to the mounting wall of the motor 2, such as the inner surface of the flange 14. For ease of installation, the brake 17 can first be fixed to the annular mounting plate 18, and then the annular mounting plate 18 together with the brake 17 can be fixed to the mounting wall. The number of brakes 17 can be one or more. In the case of having multiple brakes 17, the multiple brakes 17 can be evenly distributed along the circumferential direction of the mounting plate 18 to enhance the stability and reliability of the braking of the rotor 10. Although Figure 2 five brakes 17 are shown, the number of brakes 17 can be more or less according to requirements.

[0058] To fix the rotor 10 within the motor housing 200 when replacing or repairing the first bearing 5 and / or the seal 7, a fixing member 19 is provided within the motor housing 200 near the rotor 10. The fixing member 19 can advantageously be disposed within the braking space to save the internal space of the motor 2, and can be fixed to the mounting wall of the motor 2, such as the flange 14. The fixing member 19 can be formed as a single annular member extending in the entire circumferential direction. However, according to the space conditions within the motor housing 200, multiple discretely arranged fixing members 19 can also be provided.

[0059] In addition, the fixing member 19 can be directly fixed to the flange 14 of the motor 2 or fixed to the motor housing 200 outside the flange 14. The installation position of the fixing member 19 is not restricted as long as the fixing member 19 can be fixed within the motor housing 200 near the rotor 10 and can be operated to move towards or away from the rotor 10. However, advantageously, the fixing member 19 is fixed to the annular mounting plate 18 for mounting the brake 17, so that the fixing member 19 is fully integrated into the braking system of the motor 2 without the need to provide any additional installation space or additional installation structure for the fixing member 19, thereby reducing the assembly steps generated by the additional installation structure, reducing the number of components, and greatly saving the space within the motor 2, making the internal structure of the motor 2 very compact.

[0060] For example, in one example, as Figure 2 shown, the fixing member 19 is installed together with the brake 17 on the side surface (the surface facing the rotor 10) of the mounting plate 18. The multiple fixing members 19 are evenly distributed along the circumferential direction of the mounting plate 18 and are alternately arranged with the brakes 17 to maximize the utilization of the braking space.

[0061] During normal operation of the device, the fixing member 19 has a first position fixed within the motor housing 200. In this first position, the fixing member 19 avoids the rotor 10, i.e., does not contact the rotor 10, so as to avoid interfering with the rotation of the rotor 10. When it is necessary to replace or repair the first bearing 5 and / or the seal 7, the fixing member 19 can be operated from outside the motor 2 to move the fixing member 19 to a second position. In this second position, the fixing member 19 can axially and radially position the rotor 10 so as to subsequently fix the rotor 10.

[0062] For this purpose, the fixing member 19 can be fixed to the flange 14 on the side facing the flange 14 by one or more fasteners such as bolts (not shown), and these fasteners can be accessed from outside the flange 14 to be tightened or loosened so that the fixing member 19 can subsequently be operated to move. For example, the holes in the flange 14 for these fasteners to pass through are provided as through-holes that open on the outer side surface of the flange 14 so that the fasteners can be operated from the outside of the flange 14.

[0063] In the case where the fixing member 19 is mounted on the mounting plate 18, in order to be able to move the fixing member 19, only the fixing member 19 can be moved as described above. However, according to the space conditions within the motor housing 200, the entire mounting plate 18 can also be moved towards or away from the rotor 10. In the case of moving the entire mounting plate 18, similar to the fixing between the fixing member 19 and the flange 14, the mounting plate 18 is fixed to the flange 14 on the side facing the flange 14 by one or more fasteners such as bolts (not shown), and these fasteners can be accessed from outside the flange 14 to be tightened or loosened so that the mounting plate 18 can subsequently be operated to move. For example, the holes in the flange 14 for these fasteners to pass through are provided as through-holes that open on the outer side surface of the flange 14 so as to communicate the outside of the mounting plate 18 and the flange 14 and enable the mounting plate 18 to be operated from the outside of the flange 14.

[0064] As Figure 3 shown, in order to operate the fixing member 19 to move, an operating member 20 is provided on the side of the fixing member 19 facing the flange 14 or the motor housing 200 (the outside of the fixing member 19). The operating member 20 is operably connected to the fixing member 19 and extends outward from the fixing member 19 so as to be operable from outside the motor 2. For example, the operating member 20 can be arranged to push the fixing member 19 towards the rotor 10 when the rotor 10 is to be fixed, and pull the fixing member 19 away from the rotor 10 when the rotor 10 does not need to be fixed. Additionally, the operating member 20 can extend to the outside of the flange 14 or the motor housing 200 for easy operation. However, the operating member 20 can also extend to the inside of the flange 14 or the motor housing 200 without protruding to the outside. In this case, the fixing member 19 can be moved by means of an external operating member or tool passing through the corresponding hole in the flange 14 or the motor housing 200 to engage with the operating member 20.

[0065] As Figure 4 shown, the operating member 20 may include a connecting joint 21 and an operating portion 22 which are connected to each other. The joint 21 may be connected to the fixing member 19 to position the operating member 20 and engage with the fixing member 19 to interact with it during operation. The operating portion 22 extends from the joint 21 to operate the fixing member 19 to move it from the outside of the motor 2.

[0066] The operating member 20 may be formed into a rod-shaped structure with an enlarged end. The enlarged end constitutes the joint 21 of the operating member 20, and the enlarged end may be disposed in the groove 23 of the fixing member 19. The groove 23 may be formed into a U-shaped groove, a V-shaped groove, an arc-shaped groove or other polygonal grooves with one side (such as the radially inner side) open, having two longitudinally opposite wall surfaces. When moving the fixing member 19 towards or away from the rotor 10, the joint 21 of the operating member 20 may selectively contact the two opposite wall surfaces of the groove 23 respectively to drive the fixing member 19 to move longitudinally. According to different operating positions, the groove 23 may be disposed on the outer side surface or the circumferential end surface of the fixing member 19, and may be located on the radially inner side of the fixing member 19, however, it may also be located on the radially outer side of the fixing member 19. The rod-shaped structure constitutes the operating portion 22 of the operating member 20, and the rod-shaped structure may pass through part or all of the flange 14 so as to be accessible from the outside of the motor 2.

[0067] For ease of operation, the rod-shaped operating portion 22 may be partially or entirely provided with threads so as to move the fixing member 19 by rotating the operating member 20. For example, the operating member 20 may be in the form of a bolt. As Figure 4 shown, the bolt head of the bolt is received in the groove 23 on the outer surface of the fixing member 19 and can rotate in the groove 23. The screw of the bolt engages with the internal thread of the stationary member of the motor 2 such as the flange 14. When rotating the screw of the bolt in the clockwise or counterclockwise direction, the screw of the bolt moves longitudinally forward or backward, thereby driving the fixing member 19 to move longitudinally forward or backward via the bolt head.

[0068] Return Figure 2 , the fixing member 19 may be formed into an integral structure. In Figure 2In the example, the fixing member 19 is configured as an arc-shaped rib block, having an arc-shaped outer peripheral surface and an arc-shaped inner peripheral surface. Alternatively, the fixing member 19 may also be formed into a flat rectangle or other appropriate shape. When the fixing member 19 is mounted on the mounting plate 18, the inner peripheral surface of the fixing member 19 may be flush with the inner peripheral surface of the mounting plate 18 to avoid interference with other structures and improve the space utilization rate of the motor 2. Similarly, the fixing member 19 is not limited to having its inner peripheral surface flush with the inner peripheral surface of the mounting plate 18, and it may also be mounted toward the radially outer side such that its outer peripheral surface is flush with the outer peripheral surface of the mounting plate 18. Alternatively, the fixing member 19 may also be provided on the radially outer side of the inner peripheral surface of the mounting plate 18 or on the radially inner side of the outer peripheral surface of the mounting plate 18 without making its inner peripheral surface or outer peripheral surface flush with the mounting plate 18.

[0069] As Figure 2 As shown in the partial enlarged view on the right in FIG., the inner peripheral surface of the fixing member 19 is flush with the inner peripheral surface of the mounting plate 18. At a position corresponding to the groove 23 of the engaging portion 21 of the fixing member 19 for placing the operating member 20, the mounting plate 18 is provided with a longitudinal through groove 24 so that the operating portion 22 of the operating member 20 can pass through it. An operating gap is formed between the through groove 24 and the operating portion 22 of the operating member 20 to allow the operating portion 22 to move.

[0070] In order to fix the rotor 10 within the motor housing 200 when replacing and / or repairing the first bearing 5 and / or the seal 7, it is necessary to use the fixing member 19 to fix the rotor 10 to the mounting wall of the motor 2 such as the flange 14. The fixing member 19 can fix the rotor 10 within the motor housing 200 by means of force locking. For example, it can be achieved by fasteners or clamps. For this purpose, the fixing member 19 is provided with fixing holes 25 penetrating through the fixing member 19. Advantageously, each fixing member 19 is provided with one or more fixing holes 25 located at the central position. When the rotor 10 is to be fixed, as Figure 3 shown, fasteners such as bolts can sequentially pass through the flange 14 of the motor 2, the mounting plate 18 (if any), the fixing member 19 from the outside of the motor 2 and reach the rotor 10, for example, reach the rotor bracket 11 or the brake disc 16 fixed on the rotor bracket 11. The rotor bracket 11 or the brake disc 16 is provided with corresponding mounting holes such as threaded holes that are threadedly engaged with the bolts, and the rotor 10 is fixed within the motor housing 200 by tightening the fasteners.

[0071] In order to facilitate the alignment of the threaded holes on the rotor 10 with the fixing holes 25 on the fixing member 19 during the process of fixing the rotor 10 so that the fasteners can pass through, as Figure 2 shown, the fixing member 19 is provided with an adjustment portion 26 on the side facing the rotor 10. The adjustment portion 26 can be formed as a circumferential recess extending along the circumference of the fixing member 19, and this circumferential recess can engage with the outer circumference or inner circumference of the rotor 10 to adjust the radial position of the rotor 10 to center it.

[0072] Alternatively or additionally, the fixing holes 25 of the fixing member 19 may be formed as elongated arcuate holes which may extend in a direction corresponding to the circumferential direction of the rotor 10 so as to circumferentially select the position where the bolt passes through the fixing member 19 according to the position of the threaded holes on the rotor 10. In addition, the threaded holes on the rotor 10 may be formed to extend in the entire circumferential direction of the rotor 10 (e.g., the entire circumferential direction of the rotor bracket 11 or the brake disc 16), or may be formed as a plurality of threaded holes uniformly distributed in the circumferential direction to facilitate alignment with the fasteners. The number of the threaded holes on the rotor 10 may be more than the number of the fixing holes 25 on the fixing member 19 to enhance the matching property. Of course, according to the different sizes of the holes, the number of the threaded holes on the rotor 10 may also be less than or equal to the number of the fixing holes 25 on the fixing member 19 as long as it is convenient to connect the fixing member 19 to the rotor 10 after the machine stops.

[0073] In the present utility model, by arranging the movable fixing member 19 inside the motor housing, when it is necessary to replace or repair the first bearing 5 and / or the seal 7, the fixing member 19 can be moved to the position of the rotor 10 and the rotor 10 can be fixed inside the motor housing 200 without disassembling the rotor 10. In addition, by making the connecting components between the rotor 10 and the rotor shaft 4 such as the rotor bracket 11 or the shaft sleeve partially removable and making the holders of the first bearing 5 and / or the seal 7 removable, thus, in the state where the rotor 10 is held and fixed inside the motor housing 200, the holders of the first bearing 5 and / or the seal 7 can be removed from the motor side, so that the first bearing 5 and / or the seal 7 can be easily removed from the motor side without time-consuming and laborious disassembly of the rotor.

[0074] In addition, since the fixing member 19 is integrated into the braking system of the motor rotor, the installation space inside the motor housing can be fully utilized without making major changes to other adjacent structures inside the motor.

[0075] The removal method of removing components to be replaced or repaired such as the first bearing 5 and / or the seal 7 from the driving device is described below. This removal method is carried out after the rotor of the motor stops rotating and may include the following steps.

[0076] S1: Release the fixing member 19 fixed inside the motor housing 200 so that the fixing member 19 can move inside the motor housing 200. For example, loosen the fastener or fixture or other force-locking structure that fixes the fixing member 19.

[0077] S2: Move the fixing member 19 from its first position to its second position to engage with the rotor 10 and fix the rotor 10 within the motor housing 200. For example, operate the operating member 20 engaged with the fixing member 19 from the outside of the motor 2 to push or thread the fixing member 19 to the rotor 10 of the motor 2. After the rotor 10 is aligned with the fixing member 19, pass fasteners such as bolts through the mounting wall of the motor 2 such as the flange 14, the mounting plate 18 of the fixing member 19, the fixing member 19 and into the rotor 10 (such as the brake disc 16 mounted on the end face of the rotor bracket 11) from the outside of the motor 2 in sequence, and directly or with the aid of external tools, tighten the fasteners to fix the rotor 10.

[0078] Although the above describes operating the fixing member 19 from the outside of the motor 2 to move it, however, in the case of removing the end cover 15 of the motor 2, the fixing member 19 can also be operated inside the motor 2 through the mounting holes corresponding to the end cover 15 on the flange 14. In addition, the fixing of the rotor 10 is not limited to being fixed by fasteners, and can also be fixed by other appropriate force-locking forms.

[0079] S3: Release the connection between the rotor 10 and the rotor shaft 4, and remove a part of the connecting component between the two from the motor side. For example, as Figure 3 shown by the dashed line in the figure, from the side of the end cover 15, bring an operating tool such as a wrench close to the fastener at the connection of the first bracket 12 and the second bracket 13 of the rotor bracket 11, loosen it to release the connection, sequentially remove the components on the right side of the first bracket 12 from the motor 2, and then remove the first bracket 12 from the motor side to the outside of the motor 2. In addition to removing the first bracket 12 as described above, in the case of a connection part with other structural forms between the rotor 10 and the transmission shaft, a part of this connection part (such as a bushing) can be removed from the motor side to leave a removal space for subsequently removing the first bearing 5 and / or the seal 7 between the rotor 10 and the transmission shaft.

[0080] S4: Release the connection of the bearing housing 6 and / or the seal cover 8 inside the driving device, and remove the bearing housing 6 and / or the seal cover 8 from the motor side. For example, as Figure 3 shown by the dashed line in the figure, loosen the connection between the bearing housing 6 and the inside of the driving device (such as the partition 3 between the gearbox 1 and the motor 2), and / or loosen the connection between the seal cover 8 and the bearing housing 6, and move the bearing housing 6 and / or the seal cover 8 axially outward along the transmission shaft to the outside of the motor 2.

[0081] S5: Remove the bearing and / or the seal 7. Alternatively, the rotor shaft 4 can also be removed together with the first bearing 5 and / or the seal 7 to the outside of the motor 2.

[0082] The above steps are not entirely limited to the order described above, but can be carried out alternately. For example, after releasing all the connections, the removal of the required components can be carried out. These release actions can be implemented in the same release step and can be carried out successively or synchronously.

[0083] In addition, after fixing the rotor 10, in order to enhance the retention of the rotor 10, the orientation of the drive device can be adjusted, for example, by rotating the entire drive device by about 90 degrees so that the axial direction of the rotor shaft 4 becomes the vertical direction. Alternatively, the orientation adjustment of the drive device can also be carried out before fixing the rotor 10. However, if the holding force of the fastener is sufficient or other holding tools can be used, the orientation of the drive device does not need to be adjusted either.

[0084] After or before fixing the rotor 10, the end cover 15 located at the center of the flange 14 of the motor 2 can be opened for easy operation. In the case where the end cover 15 is provided with a plurality of operation holes 151 corresponding to the disassembly positions, the end cover 15 may not be opened during the process of releasing the connecting members.

[0085] In the state where the end cover 15 is opened, the first bracket 12 of the rotor bracket 11 and the components on its right side are taken out, and the bearing housing 6 and / or the sealing cover 8 are taken out as needed to take out the first bearing 5 and / or the seal 7.

[0086] After replacing or repairing the first bearing 5 and / or the seal 7, the components inside the motor 2 are reassembled in the reverse order of the above disassembly process, and the fixing member 19 is reset to a position away from the rotor 10 and fixed to the flange 14 of the motor 2.

[0087] Although it is described above that the fixing member 19 fixes the rotor 10 by fasteners such as bolts, however, the fixing member 19 can also fix the rotor 10 by other means such as clamps. Similarly, the rotor bracket 11, the bearing housing 6 and the sealing cover 8 are not limited to being connected to the corresponding components by fasteners, and can also be connected by other force-locking methods such as clamps. Advantageously, the connection positions of the rotor bracket 11, the bearing housing 6 and the sealing cover 8 in the motor housing 200 are radially offset from each other so as not to interfere with each other during the disassembly process, so that these connections can be released simultaneously in the same release step, improving the operation efficiency.

[0088] In addition, in order to facilitate the assembly of structures such as the rotor 10 and the flange 14 of the motor 2 into the motor housing 200, a cylindrical guide member 28 extending axially can be provided on the end face of the motor housing 200 to guide the internal components of the motor 2 into the motor housing 200 and dock the flange 14 with the motor housing 200. The fixing member 19 and the brake 17 can be pre-installed on the flange 14 and then assembled into the motor housing 200 together with the flange 14.

[0089] As described above, the present disclosure is particularly applicable to a highly integrated solution of the gearbox 1 and the electric machine 2, so that the first bearing 5 and / or the seal 7 located between the gearbox 1 and the electric machine 2 can be easily replaced or repaired without disassembling the rotor 10 of the electric machine 2. However, the present disclosure is also applicable to the case where the gearbox 1 and the electric machine 2 are independent devices and then assembled together. In addition, although the present disclosure is described above as being applicable to the electric machine 2, the present disclosure can also be used for other electric machines such as generators. In this case, the output shaft of the gearbox (as a transmission shaft) is drivingly connected to the rotor shaft of the generator.

[0090] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above specific structures, but covers various deformations and equivalent features. Those skilled in the art can make various changes without departing from the protection scope of the present invention.

Claims

1. A driving device, comprising: A gearbox (1); And An electric machine connected to the gearbox (1), Characterized in that the electric machine comprises: A housing; A stator (9) accommodated in the housing; A rotor (10) accommodated in the housing, which is releasably connected to a rotor shaft (4), the rotor shaft (4) being rotatably supported in the housing by bearings, the bearings including a first bearing (5) provided at or near the connection between the gearbox (1) and the electric machine, and a seal (7) provided near the first bearing (5) to form a seal between the gearbox (1) and the electric machine; and A fixing member (19) which is releasably provided in the housing near the rotor (10), the fixing member (19) having a first position and a second position, in the first position, the fixing member (19) does not contact the rotor (10) so as not to interfere with the rotation of the rotor (10), and in the second position, the fixing member (19) is moved to the rotor (10) to support the rotor (10) and fix the rotor (10) in the housing, so that the first bearing (5) and / or the seal (7) can be removed from the housing in a state where the rotor is fixed in the housing via the fixing member (19).

2. The drive device according to claim 1, wherein The fixing member (19) is connected to an operating member (20), the operating member (20) including an engaging portion (21) and an operating portion (22), the engaging portion (21) being positioned in a groove (23) of the fixing member (19) to longitudinally move the fixing member (19) towards or away from the rotor (10) during operation, and the operating portion (22) extending outward from the engaging portion (21) and communicating with the outside of the electric machine.

3. The drive device according to claim 2, characterized in that, The operating portion (22) is formed in a rod shape and is threadedly engaged with a stationary member of the electric machine, the engaging portion (21) being rotatably positioned in the groove (23) and selectively pushing or pulling the fixing member (19) when the operating portion (22) rotates.

4. The drive device according to claim 1, characterized in that The fixing member (19) has at least one of the following features: The fixing member (19) has an elongated hole extending in a direction corresponding to the circumference of the rotor (10), and / or the fixing member (19) has an adjusting portion (26) on the side facing the rotor (10), the adjusting portion (26) extending along the circumference to engage with the rotor (10) to center the rotor (10); and The fixing member (19) fixes the rotor (10) by a fastener or a clamp.

5. The drive device according to any one of claims 1-4, characterized in that, An installation wall is provided at an end of the housing opposite to the gearbox (1), the fixing member (19) being releasably mounted to the installation wall directly or via an annular mounting plate (18), the fixing member (19) being located between the rotor (10) and the installation wall, and the installation wall having an operating hole communicating the fixing member (19) and the outside of the electric machine.

6. The drive device according to claim 5, characterized in that, A braking system is provided between the rotor (10) and the mounting wall. The braking system includes a brake disc (16) fixed to the rotor (10) and one or more brakes (17) fixed to the mounting wall. The brakes (17) are arranged in a direction corresponding to the circumferential direction of the brake disc (16) to engage with the brake disc (16) to brake the rotor (10), and the fixing member (19) is provided near the brakes (17).

7. The drive device according to claim 6, characterized in that, A plurality of the fixing members (19) and a plurality of the brakes (17) are alternately fixed to the mounting plate (18) in the circumferential direction, and the mounting plate (18) is releasably mounted to the mounting wall.

8. The drive device according to claim 7, characterized in that, The mounting wall is a flange (14) connected to the end of the housing, and the flange is provided with an end cover (15) at a position axially opposite to the rotor shaft (4).

9. The drive device according to any one of claims 1 to 4, characterized in that, The rotor (10) is fixed to the rotor shaft (4) via a rotor bracket (11). The supporting portion of the rotor bracket (11) that supports the rotor (10) is releasably connected to a removable portion that connects the supporting portion to the rotor shaft (4). After removing the removable portion, a removal space for removing the first bearing (5) and / or the seal (7) is formed between the supporting portion of the rotor bracket (11) and the rotor shaft (4).

10. The drive device according to claim 9, characterized in that, The rotor bracket (11) includes a first bracket (12) and a second bracket (13). The first bracket (12) is fixed to the rotor shaft (4) in a torque-transmitting manner as the removable portion, and the second bracket (13) supports the rotor (10) as the supporting portion. The first bracket (12) is removably connected to the second bracket (13).

11. The drive device according to claim 10, characterized in that, The first bracket (12) includes a first bracket body (121) that is annular and disposed around the rotor shaft (4), and a first connecting plate (122) that extends radially outward from the outer surface of the first bracket body (121). The first connecting plate (122) extends in the entire circumferential direction of the first bracket body (121) or is arranged at intervals in the circumferential direction. The second bracket (13) includes a second bracket body (131) that is annular and supports the rotor (10) from the radial inside, and a second connecting plate (132) that extends radially inward from the inner surface of the second bracket body (131). The second connecting plate (132) extends in the entire circumferential direction of the second bracket body (131) or is arranged at intervals in the circumferential direction. The first connecting plate (122) is removably connected to the second connecting plate (132).

12. The drive device according to any one of claims 1-4, characterized in that, A partition (3) is provided between the gearbox (1) and the electric machine. The partition (3) divides the interior of the drive device into a gearbox chamber and an electric machine chamber. The first bearing (5) is supported between the partition (3) and the rotor shaft (4) via a bearing housing (6), and the bearing housing (6) is removably connected to the partition (3).

13. The drive device according to claim 12, characterized in that, A sealing cover (8) is mounted on an axial end of the bearing housing (6), the sealing cover (8) is inserted between the end of the bearing housing (6) and the rotor shaft (4), and a seal (7) is provided between the sealing cover (8) and the rotor shaft (4).

14. The drive device according to any one of claims 1-4, characterized in that, The drive device includes at least one of the following features: The rotor shaft (4) is integrally formed with the connected gearbox transmission shaft; and The electric machine is a motor (2) for a scraper conveyor.

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