Motor one-way brake device, motor assembly and driving device

Abstract

The utility model provides a motor one-way brake device, a motor assembly and a driving device, the motor one-way brake device is used for cooperating with a motor shaft, and the motor one-way brake device comprises: a friction member sleeved on the motor shaft and synchronously rotating with the motor shaft; the self-locking mechanism comprises a first matching part and a second matching part, the first matching part is arranged on the friction piece, the second matching part is arranged on a shell of the motor, the first matching part rotates relative to the second matching part when the motor shaft rotates around the first direction, and the second matching part rotates relative to the second matching part when the motor shaft rotates around the second direction. And the first matching part and the second matching part are in rotation stopping fit to stop rotation of the friction piece and the motor shaft. Through the technical scheme provided by the invention, the problems that the two friction surfaces are seriously heated during sliding, abrasion is easily caused and the electric energy loss of the driver is increased due to the fact that the brake mechanism of the linear driver in the related technology is of a contact type brake structure and the interaction force between the friction surfaces is relatively large can be solved.

Description

Technical Field

[0001] This utility model relates to the field of motor self-locking technology, specifically to a one-way braking device for a motor, a motor assembly, and a drive device. Background Technology

[0002] The basic principle of an electric linear actuator is to use a drive motor to rotate a lead screw and nut, thereby converting the motion into linear motion. However, even when the drive motor stops, the linear actuator still bears the load. If the self-locking force of the linear actuator is insufficient to withstand the load, the actuator will slip. Therefore, a larger self-locking force is preferable for linear actuators.

[0003] In related technologies, braking mechanisms are typically installed on linear actuators, and these mechanisms are all contact-type braking structures, directly provided by friction components. The interaction force between the friction surfaces is relatively large, thus braking the motor shaft of the actuator to a stop. However, the contact-type braking mechanism of the linear actuators in these technologies results in significant heat generation when the two friction surfaces slide, easily causing wear and increasing the energy loss of the actuator. Utility Model Content

[0004] This utility model provides a one-way braking device for a motor, a motor assembly, and a drive device to solve the problem that the braking mechanism of the linear drive in the related technology is a contact braking structure, which has a large interaction force between the friction surfaces, resulting in severe heat generation when the two friction surfaces slide, which easily causes wear and increases the power loss of the drive.

[0005] According to one aspect of the present invention, a one-way braking device for a motor is provided for engaging with the motor shaft of a motor. The one-way braking device includes: a friction element sleeved on the motor shaft and rotating synchronously with the motor shaft; and a self-locking mechanism including a first engaging part and a second engaging part. The first engaging part is disposed on the friction element, and the second engaging part is disposed on the motor housing. When the motor shaft rotates around a first direction, the first engaging part rotates relative to the second engaging part. When the motor shaft rotates around a second direction, the first engaging part and the second engaging part engage to prevent rotation of the friction element and the motor shaft.

[0006] Furthermore, the friction component includes a brake ring, with a first mating part disposed on the end face of the brake ring and a second mating part disposed on the end cap.

[0007] Furthermore, the first mating part includes an inclined protrusion disposed on the end face of the brake ring and extending toward the end cover, and the second mating part includes an inclined groove disposed on the end cover, with the inclined protrusion extending into the inclined groove.

[0008] Furthermore, the first mating part includes at least two inclined protrusions, which are spaced apart circumferentially along the brake ring. The first end of each inclined protrusion protrudes beyond the second end of the inclined protrusion in the direction of the end cap. The first end of one inclined protrusion is adjacent to the second end of an adjacent inclined protrusion in the circumferential direction of the brake ring. The second mating part includes at least two inclined grooves, which are spaced apart circumferentially along the end cap. The first end of each inclined groove protrudes beyond the second end of the inclined groove in the direction of the brake ring. The first end of one inclined groove is adjacent to the second end of an adjacent inclined groove in the circumferential direction of the end cap. The at least two inclined protrusions and the at least two inclined grooves are arranged in a one-to-one correspondence.

[0009] Furthermore, the one-way braking device for the motor also includes an elastic support member, the first end of which abuts against the motor, and the second end of which abuts against the friction member.

[0010] Furthermore, the elastic support includes an elastic pad, the middle of which has a protrusion facing the end cover of the motor, the protrusion abutting against the friction element, and the outer periphery of the elastic pad abutting against the motor.

[0011] Furthermore, the one-way braking device for the motor also includes a rotating bearing, which is sleeved on the motor shaft. An elastic support is disposed between the rotating bearing and the friction element, and the outer periphery of the elastic support abuts against the rotating bearing.

[0012] Furthermore, a retaining ring is fitted onto the motor shaft, and the retaining ring abuts against the rotating bearing.

[0013] According to another aspect of the present invention, a motor assembly is provided, including a motor and a motor one-way braking device disposed within the motor, wherein the motor one-way braking device is the motor one-way braking device provided above.

[0014] According to another aspect of the present invention, a driving device is provided, including a driver and a motor assembly, wherein the motor assembly is the motor assembly provided above.

[0015] Applying the technical solution of this utility model, a one-way braking device for a motor is used to cooperate with the motor shaft. The one-way braking device includes a friction element and a self-locking mechanism. The friction element is sleeved on the motor shaft and can rotate synchronously with it. The outer wall of the friction element frictionally engages with the motor housing. The self-locking mechanism includes a first mating part and a second mating part. The first mating part is disposed on the friction element, and the second mating part is disposed on the motor housing. When the motor shaft rotates around a first direction, the friction element also rotates around the first direction with the motor shaft. At this time, the friction element frictionally engages with the motor housing, allowing the first mating part on the friction element to... The friction element rotates relative to the second mating part on the motor housing, ensuring that the friction element rotates synchronously with the motor shaft. When the motor shaft rotates around a second direction opposite to the first direction, the first mating part of the friction element engages with the second mating part on the motor housing to prevent rotation. This prevents the friction element from rotating relative to the motor housing around the second direction, thus preventing rotation. Furthermore, since the friction element is fitted onto the motor shaft, it prevents the motor shaft from rotating around the second direction, avoiding wear and failure of the motor shaft as in the prior art, and also preventing increased current and extending the service life of the motor. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the motor provided in an embodiment of this utility model is shown;

[0018] Figure 2 A schematic diagram of the structure of the one-way braking device for a motor provided in an embodiment of this utility model is shown;

[0019] Figure 3 A schematic diagram of the brake ring provided in an embodiment of the present invention is shown;

[0020] Figure 4 This shows a schematic diagram of the brake ring provided in another embodiment of the present invention from another perspective;

[0021] Figure 5 A schematic diagram of the end cap provided in an embodiment of the present invention is shown;

[0022] Figure 6 This shows a structural schematic diagram of the end cap provided in an embodiment of the present invention from another perspective;

[0023] Figure 7 It shows Figure 6 Sectional view at point AA.

[0024] The above figures include the following reference numerals:

[0025] 10. Friction components; 11. Brake rings;

[0026] 20. Self-locking mechanism; 21. First mating part; 211. Inclined protrusion; 22. Second mating part; 221. Inclined groove;

[0027] 30. Elastic support; 31. Elastic gasket; 311. Protrusion;

[0028] 41. Motor shaft; 42. Housing; 43. End cover; 44. Rotary bearing. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] like Figures 1 to 7 As shown, this utility model embodiment provides a one-way braking device for a motor, which cooperates with the motor shaft 41 of a motor. The one-way braking device includes a friction element 10 and a self-locking mechanism 20. The friction element 10 is sleeved on the motor shaft 41 and rotates synchronously with the motor shaft 41. The self-locking mechanism 20 includes a first mating part 21 and a second mating part 22. The first mating part 21 is disposed on the friction element 10, and the second mating part 22 is disposed on the motor housing 42. When the motor shaft 41 rotates around a first direction, the first mating part 21 rotates relative to the second mating part 22. When the motor shaft 41 rotates around a second direction, the first mating part 21 and the second mating part 22 engage in anti-rotation cooperation to stop the friction element 10 and the motor shaft 41 from rotating.

[0031] The one-way braking device for motors provided in this embodiment is used to cooperate with the motor shaft 41 of a motor. The one-way braking device includes a friction element 10 and a self-locking mechanism 20. The friction element 10 is sleeved on the motor shaft 41 and can rotate synchronously with the motor shaft 41. The outer wall of the friction element 10 frictionally engages with the motor housing 42. The self-locking mechanism 20 includes a first engaging part 21 and a second engaging part 22. The first engaging part 21 is disposed on the friction element 10, and the second engaging part 22 is disposed on the motor housing 42. When the motor shaft 41 rotates around a first direction, the friction element 10 also rotates around the first direction with the motor shaft 41. At this time, the friction element 10 frictionally engages with the motor housing 42, causing the first engaging part 21 on the friction element 10 to engage with the motor housing 42. The first mating part 21 can rotate relative to the second mating part 22 on the motor housing 42, ensuring that the friction member 10 can rotate synchronously with the motor shaft 41. When the motor shaft 41 rotates around a second direction opposite to the first direction, the first mating part 21 of the friction member 10 and the second mating part 22 on the motor housing 42 engage in anti-rotation engagement. This prevents the friction member 10 from rotating relative to the motor housing 42 around the second direction, thus preventing the friction member 10 from rotating. Furthermore, since the friction member 10 is sleeved on the motor shaft 41, it can prevent the motor shaft 41 from rotating around the second direction, avoiding wear on the motor shaft 41 that could lead to motor shaft failure as in the prior art. It can also prevent increased current and extend the service life of the motor.

[0032] It should be noted that in this embodiment, when the motor shaft 41 rotates around the first direction, the motor shaft 41 will extend, and the friction member 10 can move together with the motor shaft 41. At this time, the first mating part 21 and the second mating part 22 separate, and the motor shaft 41 rotates forward. When the motor shaft 41 rotates around the second direction, the motor shaft 41 will retract into the housing 42 and reset. At this time, the friction member 10 can move together with the motor shaft 41. At this time, the first mating part 21 and the second mating part 22 engage in anti-rotation engagement, which can prevent the motor shaft 41 from reversing.

[0033] like Figure 1 , Figure 2 , Figure 4 , Figure 5 as well as Figure 7As shown, the friction element 10 includes a brake ring 11, a first mating part 21 disposed on the end face of the brake ring 11, and a second mating part 22 disposed on the end cover 43. With this structure, the brake ring 11 is designed to ensure synchronous rotation with the motor shaft 41 through an interference fit. Simultaneously, the first mating part 21 on the brake ring 11 and the second mating part 22 on the end cover 43 of the housing 42 provide a stop fit, enabling the motor shaft 41 to self-lock during reverse rotation. This improves the accuracy and response speed of the drive, and the ability to quickly self-lock during reverse rotation prevents accidental retraction, thus enhancing equipment safety.

[0034] like Figures 4 to 7 As shown, the first mating part 21 includes an inclined protrusion 211, which is disposed on the end face of the brake ring 11 and extends toward the end cover 43. The second mating part 22 includes an inclined groove 221, which is disposed on the end cover 43, and the inclined protrusion 211 extends into the inclined groove 221. Using the above structure, the relative positional change of the inclined protrusion 211 and the inclined groove 221 achieves a one-way clutch effect. When the motor shaft 41 rotates forward, the relative sliding of the inclined protrusion 211 and the inclined groove 221 allows the brake ring to rotate freely with the motor shaft 41. When the motor shaft 41 rotates in reverse, the anti-rotation engagement of the inclined protrusion 211 and the inclined groove 221 prevents the brake ring 11 from rotating in reverse, thereby achieving self-locking and effectively improving the efficiency and reliability of the driver.

[0035] like Figures 4 to 7 As shown, the first mating part 21 includes at least two inclined protrusions 211, which are spaced apart circumferentially along the brake ring 11. The first end of the inclined protrusion 211 protrudes beyond the second end of the inclined protrusion 211 in the direction of the end cap 43. The first end of one of the inclined protrusions 211 is adjacent to the second end of the adjacent inclined protrusion 211 in the circumferential direction of the brake ring 11. The second mating part 22 includes at least two inclined grooves 221, which are spaced apart circumferentially along the end cap 43. The first end of the inclined groove 221 protrudes beyond the second end of the inclined groove 221 in the direction of the brake ring 11. The first end of one of the inclined grooves 221 is adjacent to the second end of the adjacent inclined groove 221 in the circumferential direction of the end cap 43. The at least two inclined protrusions 211 and the at least two inclined grooves 221 are arranged in a one-to-one correspondence. By employing the above structure, the stability and reliability of the self-locking mechanism 20 are improved through the cooperation of multiple inclined protrusions 211 and inclined grooves 221, while reducing the wear of individual inclined protrusions 211 and inclined grooves 221, thus extending the service life of the one-way braking device. Furthermore, it can quickly achieve self-locking when the motor shaft 41 rotates in reverse, while maintaining low-friction free rotation when the motor shaft 41 rotates forward, improving the efficiency and reliability of the drive.

[0036] like Figure 2 As shown, the motor one-way braking device also includes an elastic support member 30. The first end of the elastic support member 30 abuts against the motor, and the second end of the elastic support member 30 abuts against the friction member 10. Using this structure, the elastic characteristics of the elastic support member 30 ensure more stable contact between the friction member 10 and the motor shaft 41. Simultaneously, it provides additional friction when the motor shaft reverses, enhancing the self-locking effect, improving the stability and reliability of the braking device, reducing wear on the friction member, and extending the service life of the braking device. When the motor shaft 41 rotates forward and extends out of the housing 42, the friction member 10 abuts against the elastic support member 30, thereby compressing the elastic support member 30. When the motor shaft 41 rotates backward and retracts, the elastic support member 30 releases its elastic force, ensuring that the friction member 10 can be pushed to engage with the end cover 43. This allows the first engaging part 21 of the friction member 10 to engage with the second engaging part 22 of the housing 42 in an anti-rotation engagement, improving the structural reliability of the self-locking mechanism 20.

[0037] like Figure 2 As shown, the elastic support 30 includes an elastic pad 31. A protrusion 311 is provided in the middle of the elastic pad 31 facing the end cover 43 of the motor. The protrusion 311 abuts against the friction member 10, and the outer periphery of the elastic pad 31 abuts against the motor. Using this structure, the elastic deformation characteristics of the elastic pad 31 ensure more stable contact between the friction member 10 and the motor shaft 41. Simultaneously, it provides additional friction when the motor shaft 41 reverses direction, enhancing the self-locking effect, improving the stability and reliability of the braking device, reducing wear on the friction member 10, and extending the service life of the braking device.

[0038] In other embodiments, the elastic support member may also be a spring or the like.

[0039] like Figure 2 As shown, the one-way braking device for the motor also includes a rotary bearing 44, which is sleeved on the motor shaft 41. An elastic support 30 is disposed between the rotary bearing 44 and the friction element 10, with the outer periphery of the elastic support 30 abutting against the rotary bearing 44. Using this structure, by sleeved the rotary bearing 44 on the motor shaft 41, the friction between the friction element 10 and the motor shaft 41 can be reduced. Furthermore, the placement of the elastic support 30 between the rotary bearing 44 and the friction element 10 ensures more stable contact between the friction element 10 and the motor shaft 41. The rotary bearing 44 also provides support for the motor shaft 41, reducing rotational friction.

[0040] In this embodiment, a retaining ring is fitted onto the motor shaft 41, and the retaining ring abuts against the rotating bearing 44. By adopting the above structure and utilizing the elastic characteristics of the retaining ring, the stable position of the rotating bearing 44 on the motor shaft 41 is ensured, axial movement of the rotating bearing 44 is prevented, and the stability and reliability of the braking device are improved.

[0041] Another embodiment of this utility model provides a motor assembly, including a motor and a one-way braking device disposed within the motor. The one-way braking device is the same as the one described above. Using this structure, the one-way braking device can prevent the motor shaft 41 from rotating in the opposite direction.

[0042] Another embodiment of this utility model provides a driving device, including a driver and a motor assembly, wherein the motor assembly is the motor assembly provided above. Using the above structure, the driver can drive the motor shaft 41 of the motor assembly to rotate, and can also prevent the motor shaft 41 from rotating in the opposite direction.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A one-way braking device for an electric motor, used to cooperate with the motor shaft (41) of the motor, characterized in that, The one-way braking device for the motor includes: Friction element (10) is sleeved on the motor shaft (41) and rotates synchronously with the motor shaft (41); The self-locking mechanism (20) includes a first mating part (21) and a second mating part (22). The first mating part (21) is disposed on the friction member (10), and the second mating part (22) is disposed on the housing (42) of the motor. When the motor shaft (41) rotates about a first direction, the first mating part (21) rotates relative to the second mating part (22). When the motor shaft (41) rotates about a second direction, the first mating part (21) and the second mating part (22) engage in anti-rotation engagement to prevent the friction member (10) and the motor shaft (41) from rotating.

2. The one-way braking device for a motor according to claim 1, characterized in that, The friction element (10) includes a brake ring (11), the first mating part (21) is disposed on the end face of the brake ring (11), and the second mating part (22) is disposed on the end cap (43) of the housing (42).

3. The one-way braking device for a motor according to claim 2, characterized in that, The first mating part (21) includes an inclined protrusion (211), which is disposed on the end face of the brake ring (11) and extends toward the end cap (43). The second mating part (22) includes an inclined groove (221), which is disposed on the end cap (43), and the inclined protrusion (211) extends into the inclined groove (221).

4. The one-way braking device for a motor according to claim 3, characterized in that, The first mating part (21) includes at least two inclined protrusions (211), which are spaced apart circumferentially along the brake ring (11). The first end of the inclined protrusion (211) protrudes from the second end of the inclined protrusion (211) toward the end cap (43). The first end of one of the inclined protrusions (211) is adjacent to the second end of the adjacent inclined protrusion (211) along the circumferential direction of the brake ring (11). The second mating part (22) includes at least two inclined grooves (221), which are spaced apart along the circumference of the end cap (43). The first end of the inclined groove (221) protrudes from the second end of the inclined groove (221) toward the brake ring (11). The first end of one of the inclined grooves (221) is adjacent to the second end of the adjacent inclined groove (221) along the circumference of the end cap (43). At least two inclined protrusions (211) are corresponding to at least two inclined grooves (221).

5. The one-way braking device for a motor according to any one of claims 1 to 3, characterized in that, The motor one-way braking device also includes an elastic support member (30), the first end of which abuts against the motor, and the second end of which abuts against the friction member (10).

6. The one-way braking device for a motor according to claim 5, characterized in that, The elastic support member (30) includes an elastic pad (31), and the center of the elastic pad (31) is provided with a protrusion (311) facing the end cover (43) of the motor. The protrusion (311) abuts against the friction member (10), and the outer periphery of the elastic pad (31) abuts against the motor.

7. The one-way braking device for a motor according to claim 5, characterized in that, The motor one-way braking device also includes a rotating bearing (44), which is sleeved on the motor shaft (41). The elastic support (30) is disposed between the rotating bearing (44) and the friction member (10), and the outer periphery of the elastic support (30) abuts against the rotating bearing (44).

8. The one-way braking device for a motor according to claim 7, characterized in that, A retaining ring is fitted on the motor shaft (41), and the retaining ring abuts against the rotating bearing (44).

9. A motor assembly, characterized in that, It includes a motor and a one-way braking device for the motor disposed within the motor, wherein the one-way braking device for the motor is the one-way braking device for the motor as described in any one of claims 1 to 8.

10. A driving device, characterized in that, It includes a driver and a motor assembly, wherein the motor assembly is the motor assembly of claim 9.

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