WO2020154961A1

WO2020154961A1 - Motor assembly, electric drive device, and translation assembly

Info

Publication number: WO2020154961A1
Application number: PCT/CN2019/073961
Authority: WO
Inventors: 朱志龙
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2020-08-06
Also published as: CN111316541A

Abstract

A motor assembly (10), comprising a motor (12), a connecting piece (14), and a blocking piece (16). The motor (12) comprises a motor body (122) and a motor shaft (124); the motor shaft (124) is connected to the motor body (122); the connecting piece (14) is arranged at the motor shaft (124) and is capable of rotating synchronously with the motor shaft (124); the connecting piece (14) is arranged between the blocking piece (16) and the motor body (122); the blocking piece (16) is configured to limit the connecting piece (14) from disengaging from the motor shaft (124) when the connecting piece (14) moves to the blocking piece (16) along the motor shaft (124) and abuts against the blocking piece (16). In addition, also disclosed in the present application are an electric drive device (100) and a translation assembly (1000).

Description

Motor components, electric drive equipment and translation components

Technical field

This application relates to the field of drive technology, and in particular to a motor assembly, an electric drive device and a translation assembly.

Background technique

In the related art, motors are widely used in various situations requiring driving. In motor applications, in order to connect the load with the motor, gears, such as starting gears, are generally installed on the motor shaft to transmit torque. However, after the motor has been working for a long time, the connection between the motor shaft and the starting gear of the motor may become loose, and even the starting gear may fall off, causing the connection between the motor and the starting gear to fail.

Summary of the invention

In view of this, the present application provides a motor assembly, an electric drive device and a translation assembly.

The present application provides a motor assembly including a motor, a connecting member and a stopper. The motor includes a motor body and a motor shaft. The motor shaft is connected to the motor body. The connecting member is provided on the motor shaft and can be connected to the motor shaft. The motor shaft rotates synchronously, the connecting member is provided between the stopper and the motor body, and the stopper is configured to move and resist the stopper when the connecting member moves along the motor shaft. When the blocking member is used, the connecting member is restricted from being separated from the motor shaft.

The present application provides a motor assembly including a motor, a connecting member and a movable part. The motor includes a motor body and a motor shaft. The motor shaft is connected to the motor body. The connecting member is provided on the motor shaft and can be connected to the motor shaft. The motor shaft rotates synchronously. When the connecting piece moves away from the motor body in the direction of the motor shaft, the connecting piece indirectly contacts with external components through the movable piece, and the movable piece and the The contact area of the external element is smaller than the contact area of the connecting piece in direct contact with the external element.

The present application provides an electric drive device including the above-mentioned motor assembly, a transmission assembly, and a support. The transmission assembly and the motor assembly are both arranged on the support, and the transmission assembly cooperates with the connection member. The motor assembly drives the external device to move through the transmission assembly.

The application provides a translation assembly including the above-mentioned electric drive device, and a driven part driven by the electric drive device, and the driven part cooperates with the transmission assembly so that the electric drive device and the driven part Pieces move relatively.

In the motor assembly, the electric drive device and the translation assembly of the present application, the stopper and/or the movable part can restrict the connection piece from separating from the motor shaft. Therefore, even if the connection piece is loose and moves outwards along the motor shaft, the connection piece will not detach The motor shaft ensures the effectiveness of the connection between the motor and the connector.

The additional aspects and advantages of the embodiments of the present application will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the embodiments of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic diagram of a three-dimensional structure of a translation assembly according to an embodiment of the present application.

Fig. 2 is a schematic plan view of a translational assembly according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of the translation assembly of Fig. 2 along the direction III-III.

Fig. 4 is a schematic diagram of another planar structure of the translation component of the embodiment of the present application.

Fig. 5 is a schematic diagram of a three-dimensional structure of an electric drive device according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a three-dimensional structure of a motor assembly according to an embodiment of the present application.

Fig. 7 is a schematic plan view of a motor assembly according to an embodiment of the present application.

Fig. 8 is a schematic cross-sectional view of the motor assembly of Fig. 7 along the direction VIII-VIII.

Fig. 9 is a schematic diagram of a three-dimensional structure of a motor according to an embodiment of the present application.

Description of main drawing components:

Translation component 1000, electric drive device 100, motor component 10, motor 12, motor body 122, first side 1222, second side 1224, motor joint 1226, motor shaft 124, non-cylindrical shaft 1242, cut surface 1244, stepped structure 1246, interference fit section 1248, connecting piece 14, accommodating groove 142, through hole 144, stopper 16, movable piece 18, transmission assembly 20, transmission gear set 22, driving wheel 222, driven wheel 224, large gear 2242 The pinion 2244, the turbine 226, the support 30, the stop portion 32, and the driven member 200.

detailed description

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The following embodiments described with reference to the accompanying drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation to the present application.

In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "length", "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application. And to simplify the description, rather than indicating or implying that the pointed device or element must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, "plurality" means two or more than two, unless specifically defined otherwise.

In this application, unless otherwise clearly defined and defined, the "on" or "under" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connect, or connect in one piece. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

The following disclosure provides many different embodiments or examples for realizing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the application. In addition, the present application may repeat reference numbers and/or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and/or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and/or the use of other materials.

1 to 4, the translation assembly 1000 of the embodiment of the present application includes an electric drive device 100 and a driven part 200 driven by the electric drive device 100. The driven part 200 cooperates with the electric drive device 100 to make the electric drive device 100 moves relative to the driven part 200.

The driven part 200 may be connected to a load, so that when the electric drive device 100 and the driven part 200 move relatively, the driven part 200 can drive the load, so that the translation assembly 1000 can drive the load to move. In an example, the driven part 200 moves linearly relative to the electric drive device 100, and the translation assembly 1000 can drive the load to translate. It can be understood that in other embodiments, the load may not move, and the electric drive device 100 is driven by the load to move by the reaction force transmitted by the driving member 200 during operation.

The translation assembly 1000 of the embodiment of the present application can be applied to toy devices such as toy vehicles, automated mechanical equipment, robots, or other mechanical equipment to move functional parts or loads of the equipment.

Specifically, taking a robot as an example, the translation assembly 1000 may be arranged on the body of the robot, the electric drive device 100 may be fixed relative to the body of the robot or the ground, and the load may be carried on the driven part 200. When a load needs to be moved, the electric drive device 100 drives the driven part 200, so that the driven part 200 and the load move relative to the electric drive device 100 to achieve the purpose of transporting the load. Among them, the load can be a functional part of the robot or goods moved by the robot. It can be understood that, generally, in some embodiments, the driven element 200 further includes a bearing mechanism (not shown in the figure) for bearing a load, and the load can be carried by the bearing mechanism.

Referring to FIG. 5, in some embodiments, the electric drive device 100 includes a motor assembly 10 and a transmission assembly 20, and the motor assembly 10 drives an external device to move through the transmission assembly 20.

Specifically, in the embodiment of the present application, the transmission assembly 20 cooperates with the driven part 200, and the motor assembly 10 drives the driven part 200 to move through the transmission assembly 20.

It can be understood that the motor assembly 10 can provide driving force, and the transmission assembly 20 can transmit torque and change the direction of the torque, so that the electric drive device 100 and the driven part 200 can move relatively. In an example, the transmission assembly 20 can convert the rotational movement of the motor assembly 10 into the translational movement of the driven member 200.

In some embodiments, the electric drive device 100 includes a support 30, and the motor assembly 10 and the transmission assembly 20 are both disposed on the support 30.

In this way, the support 30 can support the motor assembly 10 and the transmission assembly 20, so that the positions of the motor assembly 10 and the transmission assembly 20 are stable, and the stability of the cooperation of the motor assembly 10 and the transmission assembly 20 can be ensured. Specifically, in an example, the support 30 may be a housing (not shown) of the electric drive device 100, and the housing can protect the motor assembly 10 and the transmission assembly 20 and facilitate the installation of the electric drive device 100. In another example, the support 30 can be the body of an external device (not shown), that is, the motor assembly 10 and the transmission assembly 20 can be directly mounted on the external device. For example, when the electric drive device 100 is applied to a robot, the support 30 can be the body of the robot or a part of the body.

In some embodiments, the transmission assembly 20 includes a transmission gear set 22, the transmission gear set 22 includes a driving wheel 222 and a driven wheel 224, and the driven member 200 includes a rack, and the driven wheel 224 meshes with the rack.

In this way, when the driven wheel 224 rotates, the rack can translate relative to the driven wheel 224 and the motor assembly 10. The electric drive device 100 can control the moving direction of the rack through the rotation direction driven by the motor assembly 10, and control the moving distance of the rack through the rotation angle driven by the motor assembly 10.

Of course, in other embodiments, the driven member 200 may not be limited to a rack, but a crawler, belt or other transmission member may be selected as required, which is not specifically limited herein.

6-9, in some embodiments, the motor assembly 10 includes a motor 12 and a connecting member 14. The motor 12 includes a motor body 122 and a motor shaft 124. The motor shaft 124 is connected to the motor body 122, and the connecting member 14 is arranged at The motor shaft 124 can rotate synchronously with the motor shaft 124.

Wherein, the transmission assembly 20 and the connecting member 14 cooperate. In this way, when the electric drive device 100 is working, the motor 12 is started, the motor shaft 124 rotates relative to the motor body 122, and torque can be transmitted through the connecting member 14 and the transmission assembly 20.

In some embodiments, the connecting member 14 includes a worm, and the transmission assembly 20 includes a turbine 226 engaged with the worm.

In this way, the worm wheel 226 and the worm are tightly matched, which can realize the smooth transmission of the motor assembly 10, which is beneficial to reduce the noise generated by the electric drive device 100 during operation. Further, in an example, the cooperation of the turbine 226 and the worm can achieve self-locking, that is, the worm can drive the turbine 226 to rotate, and the turbine 226 cannot drive the worm to rotate, which can play a safety protection role and help improve the reliability of the electric drive device 100. Sex.

Of course, in other embodiments, the connecting member 14 may be a helical gear, and the transmission assembly 20 includes a gear part meshing with the helical gear, which is not specifically limited herein.

In some embodiments, the number of the transmission gear set 22 and the driven part 200 are both two.

Specifically, the two transmission gear sets 22 are respectively arranged on opposite sides of the motor assembly 10, and the two transmission gear sets 22 are matedly connected with the connecting member 14 on the opposite sides of the connecting member 14. The two driven parts 200 are respectively connected with the two transmission gear sets 22.

In one example, the electric drive device 100 can drive two driven parts 200 to move synchronously. In this way, the two driven parts 200 can jointly drive the load to move, which is conducive to stably driving the load to move and reduces the load of a single transmission gear set 22 . Of course, in other examples, when the electric drive device 100 is working, the two driven parts 200 may move asynchronously. For example, for a robot, when the electric drive device 100 is working, the two driven parts 200 may drive different parts of the robot. , So that the robot can drive different components through an electric drive device 100 to jointly complete corresponding actions.

In some embodiments, the driving wheel 222 and the turbine 226 are coaxial and can rotate synchronously. Specifically, in an example, the driving wheel 222 and the turbine 226 are integrated. The diameter of the driving wheel 222 is smaller than the diameter of the turbine 226.

Further, the driven wheel 224 is a double gear, which includes a large gear 2242 and a small gear 2244, and the large gear 2242 and the small gear 2244 are coaxial and capable of synchronous rotation. In one example, the large gear 2242 meshes with the driving wheel 222, and the small gear 2244 meshes with the rack. In this way, the transmission assembly 20 realizes a three-stage transmission through the turbine 226, the driving wheel 222 and the driven wheel 224 to form a reduction gear structure, thereby converting high-speed and low-load rotational motion into low-speed and high-load linear motion, and facilitates the accuracy of the motor assembly 10 The speed of movement of the driven member 200 is adjusted.

1 and 2, in an example, when the motor 12 drives the motor shaft 124 to rotate forward, the connecting member 14 follows the motor shaft 124 to rotate forward, and the connecting member 14 drives the transmission assembly 20 to rotate, so that the electric drive device 100 can drive the The driving member 200 moves upward. In another example, when the motor 12 drives the motor shaft 124 to reverse, the connecting member 14 follows the motor shaft 124 to reverse, and the connecting member 14 drives the transmission assembly 20 to rotate, so that the electric drive device 100 can drive the driven member 200 to move downward.

Of course, in other embodiments, when the motor 21 is reversed, the electric drive device 100 drives the driven part 200 to move downward, and when the motor 21 rotates forward, the electric drive device 100 drives the driven part 200 to move upward.

It should be noted that the driving wheel 222 and the driven wheel 224 may be spur gears or helical gears, which are not specifically limited here.

It can be understood that in some embodiments, the driven wheel 224 may be omitted from the electric drive device 100, and in this case, the driving wheel 222 may be directly connected to the driven part 200. Specifically, the driving wheel 222 may directly mesh with the rack. In this way, self-locking and transmission can be realized with fewer parts.

Of course, in other embodiments, the transmission gear set 22 may also include more gears, and multiple gears mesh with each other for transmission. The specific number of gears can be set according to actual conditions.

In some embodiments, the motor assembly 10 includes a stopper 16, and the connecting member 14 is provided between the stopper 16 and the motor body 122. The stopper 16 is configured to move toward the stopper 16 along the motor shaft 124 when the connecting member 14 is moved. When resisting to the stopper 16, the connecting member 14 is restricted from being separated from the motor shaft 124.

It can be understood that when the connecting member 14 is a worm and when the worm and the turbine 226 cooperate to transmit torque, the worm is subjected to relatively large axial friction, which easily causes the connection of the connecting member 14 in the axial direction to fail, resulting in the connecting member 14 along the distance away from the motor body 122 The direction movement even deviates from the motor shaft 124, which affects the transmission effectiveness of the motor assembly 10.

In the motor assembly 10 of the embodiment of the present application, the stopper 16 can restrict the connection member 14 from separating from the motor shaft 124. Therefore, even if the connection member 14 is loosened and moves away from the motor body 122 along the motor shaft 124, the connection member 14 will not It will be separated from the motor shaft 124 to ensure the effectiveness of the connection between the motor 12 and the connecting member 14.

In some embodiments, the blocking member 16 is a gasket, and when the connecting member 14 is against the blocking member 16, the blocking member 16 is against the external element.

That is to say, the stopper 16 may be provided on an external element, wherein the relative position of the external element and the motor assembly 10 remains fixed. It should be noted that the external components may be other components of the electric drive device 100 or other components of the translation assembly 1000.

In this embodiment, the external element is the support 30 of the electric drive device 100, and the support 30 includes a stop portion 32. When the connecting member 14 resists the stopper 16, the stopper 16 resists the stopper 32.

In some embodiments, the gasket is made of stainless steel. In this way, the gasket can have greater rigidity and better wear resistance.

In some embodiments, the motor assembly 10 includes a movable piece 18. When the connecting piece 14 moves along the motor shaft 124 in a direction away from the motor 12, the connecting piece 14 indirectly contacts an external element through the movable piece 18, and the movable piece 18 and The contact area of the external element is smaller than the contact area of the connector 14 directly contacting the external element.

In this way, the connecting piece 14 is in indirect contact with the external component through the movable piece 18. Since the contact area between the movable piece 18 and the external component is small, the movable piece 18 can reduce the frictional force when the connecting piece 14 rotates and reduce the transmission of the motor assembly 10. The power loss at the time ensures the output of the motor assembly 10.

Similarly, in the motor assembly 10 of the embodiment of the present application, the movable member 18 can restrict the connecting member 14 from being separated from the motor shaft 124. Therefore, even if the connecting member 14 loosens and moves outward along the motor shaft 124, the connecting member 14 will not be separated. The motor shaft 124 ensures the effectiveness of the connection between the motor 12 and the connector 14.

In some embodiments, the connecting member 14 is provided with a receiving groove 142 at one end close to the blocking member 16, and the movable member 18 is at least partially located in the receiving groove 142. In this way, the accommodating slot 142 can limit the position of the movable member 18 and ensure the stability of the motor assembly 10.

In some embodiments, the movable member 18 is a rolling member, and the rolling member can roll relative to the external element and/or the connecting member 14. In this way, the wear of the rolling member, the connecting member and the external element can be reduced, which is beneficial to increase the motor assembly 10 reliability.

Specifically, in one example, the movable member 18 includes balls. Further, the balls are steel balls.

In the embodiment of the present application, the movable member 18 can be arranged between the connecting member 14 and the stopper 16. When the connecting member 14 moves to the stopper 16 along the motor shaft 124, the connecting member 14 is indirectly connected to the stopper 16 through the movable member 18 The contact area between the movable part 18 and the stopper 16 is smaller than the contact area between the connecting part 14 and the stopper 16 directly.

In this way, in the motor assembly 10, the stopper 16 and the movable member 18 can jointly restrain the connecting member 14 from separating from the motor shaft 124. Therefore, even if the connecting member 14 loosens and moves outward along the motor shaft 124, the connecting member 14 will not be separated. The motor shaft 124 ensures the effectiveness of the connection between the motor 12 and the connector 14.

Further, the blocking member 16 may be arranged between the movable member 18 and the external component, so that the movable component 18 and the external component are in indirect contact.

It is understandable that, in some embodiments, when the connecting member 14 receives a force away from the motor body 122, the connecting member 14 can indirectly contact the stopper 16 through the movable member 18. At this time, the movable member 18 and the stopper Piece 16 can be movably contacted. When the connecting member 14 receives a force in the direction close to the motor body 122, the movable member 18 can be separated from the stopper 16 without contacting the stopper 16.

Accordingly, in other embodiments, the movable member 18 may be movably contacted with the external member or the movable member 18 may be separated from the external member. Or the connecting member 14 may be movably contacted with the blocking member 16 or an external element or the connecting member 14 may be separated from the blocking member 16 or an external element.

In some embodiments, the motor shaft 124 includes a non-cylindrical shaft 1242, and the connecting member 14 includes a through hole 144 that matches the non-cylindrical shaft 1242.

Specifically, the non-cylindrical shaft 1242 is located at the output end of the motor shaft 124, so that the connector 14 can be sleeved on the motor shaft 124 from the output end of the motor shaft 124. At the same time, when the connecting member 14 is sleeved on the motor shaft 124, since the motor shaft 124 is not cylindrical, the motor shaft 124 and the through hole 144 can be matched to prevent the connecting member 14 and the motor shaft 124 from rotating relative to each other, which is beneficial to the motor assembly 10 When a large torque is output, the stability of the connection of the connector 14 is ensured.

In some embodiments, the outer surface of the non-cylindrical shaft 1242 fitted with the through hole 144 is provided with at least one cut surface 1244,

In other words, the motor assembly 10 can have a cut surface 1244 on the outer surface of the cylindrical motor shaft 124 to form a non-cylindrical shaft 1242. By providing the corresponding through hole 144, it can be ensured that the motor shaft 124 can output with a large torque.

In some embodiments, the cut surface 1244 has a strip shape, and the length direction of the cut surface 1244 is parallel to the axial direction of the motor shaft 124. In this way, the connecting member 14 can be sleeved on the motor shaft 124 along the axial direction of the motor shaft 124, which facilitates the installation of the connecting member 14.

In the illustrated embodiment, the number of cut surfaces 1244 is one, and the non-cylindrical shaft 1242 is a D-shaped shaft. In other words, a cut surface 1244 is provided on the outer surface of the cylindrical motor shaft 124, so that one end of the motor shaft 124 forms a D-shaped shaft, and the cross-sectional shape of the D-shaped shaft along the vertical axis is "D". Correspondingly, the through hole 144 of the connecting member 14 is a D-shaped hole.

In other embodiments, the number of cut surfaces 1244 may be multiple, and the multiple cut surfaces 1244 are evenly distributed along the circumference of the motor shaft 124. In this way, when the connecting member 14 transmits torque, the force of the connecting member 14 can be made uniform, which improves the motor assembly. 10 stability. Specifically, when the number of the cut surfaces 1244 is multiple, the non-cylindrical shaft 1242 may be a straight shaft, a triangular shaft, a square shaft, or a shaft of other shapes.

Wherein, the cut surface 1244 also forms a stepped structure 1246 on the motor shaft 124. The through hole 144 and the stepped structure 1246 cooperate so that when the connecting member 14 is disposed on the motor shaft 124, the connecting member 14 is restricted from moving in the direction of the motor body 122.

It can be understood that the non-cylindrical shaft 1242 may not be limited to the cut surface 1244, but may be a protrusion or groove on the outer surface of the motor shaft 124. In an example, the groove may be a through slot that penetrates the motor shaft 124 from the side of the motor shaft 124, which is not specifically limited here.

It should be noted that the coupling between the connecting member 14 and the non-cylindrical shaft 1242 is not limited to the through hole 144, but blind holes or other coupling connection methods can be selected as required, which is not specifically limited here.

In some embodiments, the motor shaft 124 includes an interference fit section 1248, and the interference fit section 1248 is connected to the connecting member 14 by an interference fit. In this way, the interference fit section 1248 and the connecting member 14 can limit the axial displacement of the connecting member 14 on the motor shaft 124 to a certain extent.

That is to say, in an example, when the mating connection between the interference fit section 1248 and the connecting member 14 does not fail, the connecting member 14 or the movable member 18 is not in contact with other components, thereby reducing power loss and improving the motor assembly 10. The transmission efficiency. When the fit connection between the interference fit section 1248 and the connecting member 14 fails, the motor assembly 10 can restrict the connecting member 14 from being separated from the motor shaft 124 by the stopper 16 and/or the movable member 18 to ensure the effectiveness of the connection of the connecting member 14.

In some embodiments, the interference fit section 1248 is a knurled area on the outer peripheral surface of the motor shaft 124.

In this way, the knurling can increase the friction force of the interference fit between the connecting member 14 and the motor shaft 124, so that the connecting member 14 is not easy to move along the axial direction of the motor shaft 124. Specifically, in the illustrated embodiment, the knurling is straight-grain knurling, which is a plurality of grooves evenly spaced along the axial direction of the motor shaft 124, and the plurality of grooves are strip-shaped and grooved. The length direction is parallel to the axial direction of the motor shaft 124.

In other embodiments, the knurling is a net knurling, and the net knurling is a net-shaped groove on the outer surface of the motor shaft 124.

In some embodiments, the motor body 122 includes a first side 1222 and a second side 1224 opposite to each other, the motor shaft 124 passes through the first side 1222, and the second side 1224 is provided with a motor joint 1226. The motor connector 1226 can be connected to a power source for driving the motor 12.

In the description of this specification, reference is made to the terms "certain embodiments", "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples", etc. The description means that the specific feature, structure, material or feature described in combination with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiment undergoes changes, modifications, substitutions and modifications.

Claims

A motor assembly, characterized in that it includes a motor, a connecting piece and a stopper, the motor includes a motor body and a motor shaft, the motor shaft is connected to the motor body, and the connecting piece is provided on the motor shaft and can Rotate synchronously with the motor shaft, the connecting member is provided between the stopper and the motor body, and the stopper is configured to move and move the stopper along the motor shaft. When resisting to the blocking member, the connecting member is restricted from being separated from the motor shaft.
The motor assembly of claim 1, wherein the motor assembly further comprises a movable part, and when the connecting part moves along the motor shaft to the stopper, the connecting part passes through the movable part It is in indirect contact with the stopper, and the contact area between the movable part and the stopper is smaller than the contact area between the connecting part and the stopper directly.
The motor assembly according to claim 2, wherein an end of the connecting member close to the stopper is provided with an accommodation groove, the movable part is at least partially located in the accommodation groove, and the movable part It can be movably contacted with the blocking member or the movable member is separated from the baffle.
The motor assembly according to any one of claims 2-3, wherein the movable part is a rolling part.
The motor assembly of claim 1, wherein the motor shaft comprises a non-cylindrical shaft, and the connecting member is provided with a through hole matching the non-cylindrical shaft.
5. The motor assembly according to claim 5, wherein the outer surface of the non-cylindrical shaft fitted with the through hole is provided with at least one cut surface.
7. The motor assembly of claim 6, wherein the cut surface is strip-shaped, and the length direction of the cut surface is parallel to the axial direction of the motor shaft.
8. The motor assembly of claim 7, wherein when the number of the cut surfaces is multiple, the multiple cut surfaces are evenly distributed along the circumferential direction of the motor shaft.
The motor assembly of claim 5, wherein the non-cylindrical shaft comprises a D-shaped shaft.
The motor assembly according to claim 1, wherein the motor shaft includes an interference fit section, and the interference fit section and the connecting member are connected by an interference fit.
The motor assembly of claim 10, wherein the interference fit section is an area on the outer peripheral surface of the motor shaft with knurling.
The motor assembly of claim 1, wherein the connecting member includes a worm.
The motor assembly according to claim 1, wherein the motor body includes a first side and a second side opposite to each other, the motor shaft passes through the first side, and the second side is provided with Motor connector.
The motor assembly of claim 1, wherein the stopper is a gasket, and when the connecting member is against the stopper, the stopper is against an external element.
The motor assembly of claim 14, wherein the gasket is made of stainless steel.
A motor assembly, characterized in that it comprises a motor, a connecting piece and a movable piece, the motor comprising a motor body and a motor shaft, the motor shaft is connected to the motor body, and the connecting piece is provided on the motor shaft and is capable of Rotate synchronously with the motor shaft. When the connecting piece moves away from the motor body in the direction of the motor shaft, the connecting piece indirectly contacts an external element through the movable piece, and the movable piece and The contact area of the external element is smaller than the contact area of the connecting piece in direct contact with the external element.
The motor assembly according to claim 16, wherein an end of the connecting piece close to the movable piece is provided with an accommodation groove, and the movable piece is at least partially located in the accommodation groove.
The motor assembly according to claim 16 or 17, wherein the movable part is a rolling part.
The motor assembly of claim 16, wherein the motor shaft comprises a non-cylindrical shaft, and the connecting piece is provided with a through hole matching the non-cylindrical shaft.
The motor assembly according to claim 19, wherein the outer surface of the non-cylindrical shaft that fits with the through hole is provided with at least one cut surface.
The motor assembly of claim 20, wherein the cut surface has a strip shape, and the length direction of the cut surface is parallel to the axial direction of the motor shaft.
The motor assembly of claim 21, wherein when the number of the cut surfaces is multiple, the multiple cut surfaces are evenly distributed along the circumferential direction of the motor shaft.
The motor assembly of claim 19, wherein the non-cylindrical shaft comprises a D-shaped shaft.
The motor assembly according to claim 16, wherein the motor shaft comprises an interference fit section, and the interference fit section is connected to the connecting member by an interference fit.
The motor assembly according to claim 24, wherein the interference fit section is a knurled area on the outer peripheral surface of the motor shaft.
The motor assembly of claim 16, wherein the connecting member includes a worm.
The motor assembly according to claim 16, wherein the motor assembly further comprises a stopper, and the stopper is arranged between the external element and the movable part, so that the movable part and the external The components are in indirect contact.
An electric drive device, comprising the motor assembly, the transmission assembly and the support according to any one of claims 1-27, the motor assembly and the transmission assembly are both arranged on the support, so The transmission component is matched with the connecting piece, and the motor component drives the external device to move through the transmission component.
The electric drive device according to claim 28, wherein the supporting member includes a stop portion, and the connecting member indirectly abuts the stop portion.
The electric drive device of claim 28, wherein the connecting member includes a worm, and the transmission assembly includes a turbine engaged with the worm.
The electric drive device of claim 30, wherein the transmission assembly further comprises a transmission gear set, the transmission gear set includes a driving wheel and a driven wheel, and the driving wheel and the turbine wheel are coaxial.
The electric drive device according to claim 31, wherein the number of the transmission gear set is two.
A translation assembly, characterized by comprising the electric drive device according to any one of claims 28-32, and a driven part driven by the electric drive device, and the driven part cooperates with the transmission assembly , So that the electric drive device and the driven part move relatively.
The translation assembly according to claim 33, wherein the driven part includes a rack, the transmission assembly includes a transmission gear set, and the transmission gear set includes a driving wheel and a driven wheel, and the driven wheel and the driven wheel The rack is engaged.
The translation assembly according to claim 34, wherein the number of the transmission gear set and the number of the driven parts are both two.