Brake assembly, speed reducer assembly and rotation supporting assembly

Abstract

The utility model provides a brake assembly, which is characterized in that the brake assembly is configured to be suitable for a speed reducer and comprises an electromagnetic brake (101), a brake element (102) and a brake element (104), the shell (102) is used for limiting an internal space and is used for accommodating the electromagnetic brake (101); wherein the electromagnetic brake (101) is configured to be positionable on the downstream side of the electric motor and on the upstream side of the decelerator (300) and to be spaced apart from the electric motor by the housing (102), the electromagnetic brake (101) being further configured to be connected to a separate power source with respect to the electric motor such that, in the event of an unexpected failure of the electric motor, the electromagnetic brake (101) is electrically connected to the housing (102). According to the invention, the electromagnetic brake (101) is able to operate independently and normally with respect to the electric motor, and the electromagnetic brake (101) comprises a rotating shaft (1011), the upstream end of which is configured to be connectable to the electric motor and the downstream end of which is configured to be connectable to the decelerator.

Description

Technical Field

[0001] The present application relates to a braking assembly, and in particular, it can be used in a speed reducer. In addition, the present application also relates to a speed reducer assembly. In addition, the present application also relates to a slewing bearing assembly. Background Art

[0002] In the prior art, industrial machinery (such as an excavator) often uses a hydraulic system to provide power. However, with the current trend of more widespread application of electricity, especially the rapid development of new technologies related to new energy vehicles that use electric energy as the main, or even the only, energy source, in industrial machinery, the demand for using electric energy as the energy to drive the transmission system is becoming increasingly urgent.

[0003] Based on this consideration, an electric motor is usually introduced as the power source to drive the actuating member. The characteristics of the electric motor itself determine that the energy it outputs has a high rotational speed and a low torque. The objects of industrial machinery often have the characteristics of large load and large volume, so energy with a low rotational speed but a large torque is required to drive. Therefore, the energy directly output by the electric motor cannot meet the requirements of the actuating members of industrial machinery. To solve this problem, a speed reducer is usually installed downstream of the electric motor to adjust the above manifestation form of electric energy to meet the actual requirements of the actuating members.

[0004] In order to control the electric motor to the speed reducer more effectively and / or precisely, a corresponding brake is required.

[0005] In the prior art, the power supply device is a hydraulic motor, so a hydraulic brake is correspondingly used. For an electric motor, an electromagnetic brake is correspondingly required.

[0006] However, the electromagnetic brakes in the prior art cannot directly meet the requirements of industrial machinery and still need to be improved.

[0007] Considering but not limited to the above situations, it is desirable to provide a new braking assembly for a speed reducer to solve or at least alleviate the above problems. Summary of the Utility Model

[0008] The present application aims to provide a braking assembly for a speed reducer, which is advantageous over the prior art in at least one aspect.

[0009] To this end, in one aspect, the present application provides a braking assembly, characterized in that the braking assembly is configured to be applicable to a speed reducer and includes: an electromagnetic brake; and a housing that defines an internal space for accommodating the electromagnetic brake; wherein the electromagnetic brake is configured to be positioned on the downstream side of the electric motor and the upstream side of the speed reducer and is spaced apart from the electric motor by the housing, and the electromagnetic brake is further configured to be connected to a separate power source relative to the electric motor, so that in the event of an accidental failure of the electric motor, the electromagnetic brake can operate normally independently of the electric motor, and the electromagnetic brake includes a rotating shaft, the upstream end of the rotating shaft is configured to be connectable to the electric motor and the downstream end of the rotating shaft is configured to be connectable to the speed reducer.

[0010] In a feasible exemplary embodiment, the braking assembly further includes a downstream spacer, the downstream spacer is positioned between the braking assembly and the speed reducer, and is configured to be able to space the internal space of the braking assembly from the internal space of the speed reducer.

[0011] In a feasible exemplary embodiment, an opening is provided at the center of the downstream spacer for the downstream end of the rotating shaft to pass through and be coupled to the input shaft of the speed reducer, and a downstream sealing device is arranged at the opening to fluid-insulate the braking assembly from the speed reducer, so as to prevent the lubricating oil carried inside the speed reducer from leaking into the internal space of the braking assembly.

[0012] In a feasible exemplary embodiment, the rotating shaft of the braking assembly can be coupled to the output shaft of the electric motor in a splined connection manner at the upstream end, and a seal is arranged on the side close to the electromagnetic brake at the splined connection between the output shaft of the electric motor and the rotating shaft.

[0013] In a feasible exemplary embodiment, the rotating shaft of the braking assembly can be coupled to the input shaft of the speed reducer in a splined connection manner at the downstream end, and a seal is arranged on the side close to the electromagnetic brake at the splined connection between the input shaft of the speed reducer and the rotating shaft.

[0014] In a feasible exemplary embodiment, the electromagnetic coil included in the electromagnetic brake of the braking assembly is electrically connected to a power source through a wire, so that the power supply of the electromagnetic brake is independent of the electric motor.

[0015] In a feasible exemplary embodiment, the braking assembly further includes: a braking action detector, the braking action detector is configured to be able to sense the braking state of the electromagnetic brake and transmit a signal representing the braking state to an electronic control unit.

[0016] In a feasible exemplary embodiment, the braking assembly further includes: an electromagnetic brake life detector configured to sense the wear degree of the friction plate of the braking assembly and transmit a signal representing the wear degree of the friction plate to the electronic control unit.

[0017] In another aspect, the present application also relates to a speed reducer assembly, including: the braking assembly as described above; and a speed reducer, where the braking assembly is configured to be coupled to the speed reducer and brake the speed reducer.

[0018] In yet another aspect, the present application also relates to a slewing bearing assembly, including: the speed reducer assembly as described above; and a slewing bearing mechanism, where the speed reducer assembly is configured to be coupled to the slewing bearing mechanism.

[0019] The braking assembly for a speed reducer, the speed reducer assembly, and / or the slewing bearing assembly according to the present application provides advantages of a solution that includes, but is not limited to, introducing an electromagnetic braking method into the speed reducer and being able to robustly and conveniently integrate with an electric motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure shows a braking assembly according to an embodiment of the present application.

[0021] Figure 2 The figure shows a braking assembly according to an embodiment of the present application and shows its positional relationship relative to the speed reducer.

[0022] Figure 3 The figure shows an electromagnetic brake according to an embodiment of the present application, shown in the axial direction.

[0023] Figure 4 The figure shows Figure 3 the electromagnetic brake in the figure, shown in a direction perpendicular to the axial direction.

[0024] Figure 5 The figure shows a braking assembly according to an embodiment of the present application and shows its positional relationship relative to the speed reducer and the electric motor. DETAILED DESCRIPTION

[0025] Some feasible embodiments of the present application are described below with reference to the drawings. It should be noted that the figures are not drawn to scale. Some details may be enlarged for clear display, and some non-essential details are omitted.

[0026] As Figures 1 - 2 and Figure 5 shown, the figure shows a braking assembly 100 according to an embodiment of the present application and its positional relationship relative to the speed reducer 300 (where Figure 2 andFigure 5 Two implementation manners of the speed reducer 300 are respectively shown, for example, which can be respectively used for the position relationship of the hoisting operation and the slewing operation). The braking assembly 100 includes an electromagnetic brake 101 and a housing 102. The housing 102 defines an internal space for accommodating the electromagnetic brake 101.

[0027] The electromagnetic brake 101 is positioned between the electric motor 200 (shown in Figure 5 ) and the speed reducer 300 (see Figure 2 and Figure 5 ), that is to say, the electric motor and the speed reducer 300 clamp the electromagnetic brake 101 therebetween.

[0028] In addition, the electromagnetic brake 101 includes a rotating shaft 1011. The upstream end 1011a of the rotating shaft 1011 (shown as the left side in Figure 1 ) is connected to the electric motor (output shaft), and the downstream end 1011b of the rotating shaft 1011 is connected to the speed reducer (input shaft).

[0029] In this way, the safety of the entire transmission system can be improved. This has at least the following advantages: Even in the case of the failure of the electric motor (for example, due to various accidental conditions), since the electromagnetic brake 101 is positioned on the downstream side rather than the upstream side of the electric motor, therefore, the electromagnetic brake 101 will not fail due to the failure of the electric motor, but can still work normally independently, thereby improving the safety of the entire system.

[0030] The electromagnetic brake 101 further includes an electromagnetic coil 1012, which serves as a stator and is connected to a power supply through a wire 3 (see Figures 3 - 4 ). This power supply can be configured to be independent of the power supply associated with the electric motor (not shown), or connected to the same power supply associated with the electric motor in parallel. The electromagnetic coil 1012 is configured to generate and eliminate an electromagnetic field in a manner of energizing and de-energizing. For example, when the electromagnetic coil 1012 is energized, an electromagnetic field is generated, and when the electromagnetic coil 1012 is de-energized, the electromagnetic field is eliminated. Another example is that when the electromagnetic coil 1012 is de-energized, an electromagnetic field is generated; and when the electromagnetic coil 1012 is energized, the electromagnetic field is eliminated.

[0031] The electromagnetic brake 101 further includes a magnet 1013, which serves as a rotor and is configured to be rotatably fastened to the rotating shaft 1011 and be able to rotate coaxially with the rotating shaft 1011.

[0032] The electromagnetic brake 101 further includes a friction plate 1014. The friction plate 1014 is positioned between the electromagnetic coil 1012 and the magnet 1013. The friction plate 1014 is also configured to increase the frictional force between the electromagnetic coil 1012 and the magnet 1013 when in contact with the electromagnetic coil 1012 and the magnet 1013, so that the magnet 1013 remains stationary relative to the electromagnetic coil 1012. The friction plate 1014 may be made of aluminum alloy, or at least the main body of the friction plate 1014 may be made of aluminum alloy.

[0033] When an electromagnetic field is generated, the magnet 1013 is attracted by the electromagnetic coil 1012 and moves towards the electromagnetic coil 1012, resulting in the magnet 1013 coming into contact with the friction plate 1014. The static frictional force provided by the friction plate 1014 acts as a resistance to prevent the rotation of the magnet 1013, thereby driving the rotation shaft 1013 to stop rotating. In this way, the braking operation is completed.

[0034] When the electromagnetic field is eliminated, the magnet 1013 is pushed away by a spring (not shown) in a direction away from the electromagnetic coil 1012, so that the magnet 1013 and the electromagnetic coil 1012 are separated again by the distance of the air gap. Accordingly, the magnet 1013 is separated from the friction plate 1014, so that the friction plate 1014 does not hinder the rotation shaft 1011 from driving the magnet 1013 to rotate.

[0035] The housing 102 has a top wall 102a, a bottom wall 102b opposite to the top wall 102a, and side walls 102c. One side of the housing 102 opposite to the side wall 102c and facing the speed reducer 300 is designed to be open. The side wall 102c connects the top wall 102a and the bottom wall 102b and is configured to face the side of the electric motor and be capable of being connected to the electric motor, for example, fastened to the output end of the electric motor by screws.

[0036] The electromagnetic coil 1012, the magnet 1013, the friction plate 1014, and the spring are received in the internal space formed by the top wall 102a, the bottom wall 102b, and the side walls 102c.

[0037] On the one hand, the housing 102 and the electromagnetic brake 101, especially the electromagnetic coil 1012 and the magnet 1013, can be configured as an integral structure. Thus, the combination of the housing 102 and the electromagnetic brake 101 (especially the electromagnetic coil 1012 and the magnet 1013) can be installed together on the speed reducer and / or removed from the speed reducer without changing the distance of the air gap.

[0038] On the other hand, for the electromagnetic brake 101, the position of the electromagnetic coil 1012 relative to the housing 102 is set to be fixed, and the position of the magnet 1013 relative to the housing 102 is also set to be fixed. Thus, the position of the electromagnetic coil 1012 relative to the magnet 1013 is also fixed. In this way, it can be known that the distance of the air gap existing between the electromagnetic coil 1012 and the magnet 1013 is fixed.

[0039] In this way, when the electromagnetic brake 101 is installed on the speed reducer and / or removed from the speed reducer, the housing 102 can be installed and / or removed together with the electromagnetic brake 101 without separating the electromagnetic brake 101 from the housing 102. Therefore, during this installation and / or removal process, the relative position relationship between the electromagnetic coil 1012 and the magnet 1013 and the distance of the air gap therebetween are not changed. Thus, the electromagnetic brake 101 can be conveniently installed on the speed reducer multiple times during use, and at the same time, it can also avoid the trouble of recalibrating the electromagnetic brake 101 required each time the electromagnetic brake 101 is reinstalled on the speed reducer in the prior art (usually caused by the change of the relative position between the electromagnetic coil and the magnet).

[0040] For the housing 102, an opening is formed in the side wall 102c (at the center) for the rotating shaft 1011 (the upstream end) to pass through so as to connect to the output shaft of the electric motor for torque transmission. Then, the remaining gap of the opening can be filled with the upstream spacer 4.

[0041] Correspondingly, the electric motor may not have an end cover on the output side, but is directly connected to the outer surface of the side wall 102c of the housing 102. In this way, the material cost can be further reduced and the space can be saved, making the whole system more compact.

[0042] An upstream sealing device 5 can also be provided between the upstream spacer 4 and the side wall 102c to isolate the electric motor from the internal space. This can avoid the adverse effect on the electromagnetic brake 101 caused by the fluid inside the electric motor entering the internal space. The upstream sealing device 5 can be implemented as a sealing ring, such as an O-ring.

[0043] The brake assembly 100 is positioned to be able to space apart the internal space formed by the housing 102 from the speed reducer 300 and to make the brake assembly 100 completely located outside the speed reducer 300. In this way, compared with the prior art solution of positioning the braking component inside the speed reducer, the technical solution disclosed in the present application can protect the electromagnetic brake 101, especially the electromagnetic elements of the electromagnetic brake 101 (for example, the electromagnetic coil 1012 and / or the magnet 1013) away from the rotating elements in the speed reducer 300, thereby avoiding unwanted electromagnetic interference.

[0044] In addition, a downstream spacer 6 is disposed between the brake assembly 100 and the speed reducer 300 and is configured to be able to space the internal space of the brake assembly 100 from the internal space of the speed reducer 300. An opening is provided at the center of the downstream spacer 6 for the downstream end of the rotating shaft 1011 to pass through and be coupled to the input shaft of the speed reducer 300. A downstream sealing device 7 may also be arranged at this opening, so as to insulate the brake assembly 100 from the speed reducer 300 fluidly, thereby preventing the lubricating oil carried inside the speed reducer 300 from leaking into the internal space of the brake assembly and causing pollution to the components of the electromagnetic brake 101. The downstream sealing device 7 may be implemented as a sealing ring, such as an O-ring.

[0045] The upstream end of the rotating shaft 1011 can be connected to the output shaft of the electric motor in a splined connection manner. A seal, such as an O-ring, can be arranged between the output shaft of the electric motor and the rotating shaft 1011, on the side close to the electromagnetic brake 101 at this splined connection. Correspondingly, the downstream end of the rotating shaft 1011 can be connected to the speed reducer 300 in a splined connection manner. A seal, such as an O-ring, can be arranged between the input shaft of the speed reducer and the rotating shaft 1011, on the side close to the electromagnetic brake 101 at this splined connection.

[0046] As Figures 3 - 4 shown, the brake assembly 100 may further include a brake operation detector 8 arranged on the electromagnetic brake 101. The brake operation detector 8 is configured to be able to sense the braking state (whether braking) of the electromagnetic brake 101 and transmit a signal representing the braking state to an electronic control unit (not shown for ease of understanding). In this way, the working state of the electromagnetic brake 101 can be conveniently monitored, thereby improving the robustness and safety of the entire system.

[0047] As Figures 3 - 4 shown, the brake assembly 100 may further include an electromagnetic brake life detector 9 arranged on the electromagnetic brake 101. The electromagnetic brake life detector 9 is configured to be able to sense the wear degree of the friction plate 1014 and is configured to transmit a signal representing the wear degree of the friction plate to the electronic control unit. In this way, the wear degree of the friction plate can be monitored in a timely manner, and the friction plate can be replaced in a timely manner before it fails due to overuse, thereby improving the safety of the entire system and saving costs at the same time.

[0048] This application also discloses a speed reducer assembly. Such a speed reducer assembly includes a speed reducer and a brake assembly 100.

[0049] The braking assembly 100, specifically the housing 102 of the braking assembly, can be configured to be fixed to the speed reducer, specifically the flange 301 of the speed reducer, which can be formed into a structure integral with the support shaft 302. An opening for filling lubricating oil into the speed reducer can be arranged on the top side of the support shaft flange 301. (For example, two) process holes can also be provided on the support shaft 302 for the screws for installing the speed reducer to the drum to pass through.

[0050] It can be understood that the speed reducer 300 referred to in this application can be implemented as any other different suitable actuator according to the actual situation.

[0051] This application also relates to a slewing bearing assembly, which includes a slewing bearing mechanism and the above-mentioned speed reducer assembly. The speed reducer assembly is configured to be capable of being coupled to the slewing bearing mechanism.

[0052] For example, the slewing bearing mechanism can be configured for an excavating machine, especially for the upper carriage of such an excavating machine, for example, for the rotation of the cab.

[0053] As used herein, the term "comprising" is open-ended and includes one or more stated features, elements, components, or functions, but does not exclude the presence or addition of one or more other features, elements, components, functions, or combinations thereof.

[0054] The above description of the embodiments of this application has been provided for purposes of illustration and description. This is not intended to be exhaustive or to limit the present invention to the precise form disclosed. Within the scope of this application, it can be understood that the various aspects, embodiments, examples, and alternatives set forth in the foregoing paragraphs, claims, and / or in the specification and drawings, especially their respective features, can be taken independently or in any combination. That is, all embodiments and / or the features of any embodiment can be combined in any way and / or combination, unless these features are incompatible. It can be understood that many modifications and variations are available to those skilled in the art. The embodiments are selected and described to appropriately explain the principles of the present invention and its practical applications, so that other persons skilled in the art can understand the various embodiments of the present invention and the various modifications suitable for the specific purposes contemplated. The applicant reserves the right to change any originally filed claim or to file any new claim accordingly, including modifying any originally filed claim to subordinate and / or incorporate any feature of any other claim, even though it was not originally claimed in such a manner.

Claims

1. A brake assembly, characterized in that: The brake assembly is configured to be suitable for use with a speed reducer and comprises: an electromagnetic brake (101); and A housing (102), wherein the housing (102) defines an internal space for accommodating the electromagnetic brake (101); The electromagnetic brake (101) is configured to be positioned on the downstream side of the electric motor and the upstream side of the reducer (300) and is spaced apart from the electric motor by a housing (102). The electromagnetic brake (101) is also configured to be connected to a separate power source relative to the electric motor so that in the event of an unexpected failure of the electric motor, the electromagnetic brake (101) can operate normally and independently relative to the electric motor. The electromagnetic brake (101) includes a rotating shaft (1011), the upstream end of the rotating shaft (1011) being configured to be connected to the electric motor and the downstream end of the rotating shaft (1011) being configured to be connected to the reducer.

2. The brake assembly according to claim 1, characterized in that: The invention also includes a downstream spacer (6) which is positioned between the brake assembly (100) and the reducer (300) and is configured to separate the inner space of the brake assembly (100) from the inner space of the reducer (300).

3. The brake assembly according to claim 2, characterized in that: The downstream spacer (6) is provided with an opening at the center thereof, through which the downstream end of the rotating shaft (1011) passes and is coupled with the input shaft of the reducer (300). A downstream sealing device (7) is arranged at the opening to insulate the brake assembly (100) from the fluid of the reducer (300), thereby preventing the lubricating oil contained in the reducer (300) from leaking into the internal space of the brake assembly (100).

4. The brake assembly according to any one of claims 1 to 3, characterized in that: The rotating shaft (1011) of the brake assembly can be coupled to the output shaft of the electric motor in a spline connection at the upstream end, wherein a seal is arranged between the output shaft of the electric motor and the rotating shaft (1011) and on the side of the spline connection close to the electromagnetic brake (101).

5. The brake assembly according to claim 4, characterized in that: The rotating shaft (1011) of the brake assembly can be coupled to the input shaft of the reducer (300) in a spline connection at the downstream end, wherein a seal is arranged between the input shaft of the reducer (300) and the rotating shaft (1011) and on the side of the spline connection close to the electromagnetic brake (101).

6. The brake assembly according to any one of claims 1 to 3, characterized in that: The electromagnetic coil (1012) included in the electromagnetic brake (101) of the brake assembly (100) is electrically connected to a power source through a wire (3), so that the power supply of the electromagnetic brake (101) is independent of the electric motor.

7. The brake assembly according to any one of claims 1 to 3, characterized in that: Also includes: A braking action detector (8) is configured to sense a braking state of an electromagnetic brake (101) and transmit a signal representing the braking state to an electronic control unit.

8. The brake assembly according to any one of claims 1 to 3, characterized in that: Also includes: An electromagnetic brake life detector (9) is configured to sense the degree of wear of a friction plate (1014) of a brake assembly (100) and transmit a signal representing the degree of wear of the friction plate (1014) to an electronic control unit.

9. A reducer assembly, characterized in that: include: The brake assembly according to any one of claims 1 to 8; and The brake assembly is configured to be coupled to the retarder and brake the retarder.

10. A slewing support assembly, characterized in that: include: The reducer assembly according to claim 9; and A slewing support mechanism, wherein the speed reducer assembly is configured to be coupled to the slewing support mechanism.

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