Brake, driving device and electric wheelchair

Abstract

The utility model relates to the technical field of brake waterproof design, and discloses a brake, a driving device and an electric wheelchair, the brake comprises a shell, a brake mechanism, a handle and a blocking piece, the outer side wall of the shell is provided with an operation opening and a blocking part arranged around the operation opening, the brake mechanism is arranged in the shell, one end of the handle is connected with the brake mechanism, and the other end of the handle is connected with the blocking part. The other end of the handle penetrates through the operation opening and extends to the outer side of the shell to form an operation part, the handle can reciprocate relative to the shell in the extending direction of the operation opening, one part of the blocking piece is arranged on the operation part in a sleeving mode, and the other part of the blocking piece is arranged on the outer side of the blocking part in a covering mode and movably matched with the blocking part. The blocking part is arranged on the outer side wall of the shell in a protruding mode and arranged on the peripheral side of the operation opening in a surrounding mode, so that rainwater and other foreign matter are prevented from flowing into the operation opening along the outer side wall of the shell and entering the brake and the motor through the operation opening, normal operation of the brake and the motor is guaranteed, and the service life of the brake and the motor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of waterproof brake design technology, and in particular to a brake, drive device and electric wheelchair. Background Technology

[0002] As an important type of assistive mobile device, electric wheelchairs typically rely on electric motors for their drive systems. During use, brakes are widely used to lock or disengage the motor's output shaft, enabling the switching between motor-driven and manual-driven operation, thus achieving both braking and unlocking of the motor.

[0003] The brake mainly consists of a housing, a braking mechanism, and a handle. The housing has an operating port, the braking mechanism is located inside the housing, one end of the handle is connected to the braking mechanism, and the other end of the handle extends to the outside of the housing through the operating port. The handle can be used to control the engagement state between the braking mechanism and the motor's drive shaft, thereby locking or disengaging the motor's drive shaft.

[0004] However, during use, rainwater or other foreign objects can easily enter the brake through the operating port, affecting the normal operation of the brake and reducing its service life. Utility Model Content

[0005] The present invention aims to provide a brake, a drive device, and an electric wheelchair to solve the technical problem in the prior art where rainwater or other foreign objects can easily enter the brake through the operating port, affecting the normal operation of the brake and reducing its service life.

[0006] The present invention addresses its technical problem by providing the following technical solution: a brake, comprising:

[0007] The housing has an operating port on its outer side wall and a blocking part surrounding the operating port;

[0008] A braking mechanism, wherein the braking mechanism is disposed within the housing;

[0009] A handle, one end of which is connected to the brake mechanism, and the other end of which passes through the operating port and extends to the outside of the housing to form an operating part. The handle can reciprocate relative to the housing along the extension direction of the operating port.

[0010] A barrier, one part of which is sleeved on the operating part, and the other part of which covers the outside of the blocking part and is movably engaged with the blocking part.

[0011] In this embodiment, a barrier prevents rainwater and other foreign objects from entering the brake through the operating port. A blocking portion protrudes from the outer wall of the housing and surrounds the outer periphery of the operating port, further preventing rainwater and other foreign objects from flowing into the operating port along the outer wall of the housing. This avoids rainwater and other foreign objects entering the brake and motor through the operating port, ensuring the normal operation of the brake and motor and extending their service life.

[0012] In some embodiments, the barrier includes a cover plate and a barrier portion circumferentially disposed around the periphery of the cover plate, the barrier portion extending toward the housing, the barrier portion covering the outside of the blocking portion and engaging with the blocking portion with a clearance, so that the barrier portion can reciprocate relative to the blocking portion along the extension direction of the operating port.

[0013] In this embodiment, the barrier and the blocking part can form a double protective barrier. The barrier can effectively prevent most rainwater or foreign objects from directly entering the operating port. Even if a small amount of rainwater or foreign objects seep into the area between the barrier and the blocking part through the gap between the barrier and the outer surface of the shell, they can still be intercepted by the blocking part a second time, thereby minimizing the entry of rainwater or foreign objects into the operating port and significantly improving waterproof performance and reliability.

[0014] Furthermore, the blocking part and the blocking part are fitted with a clearance, and the circumferential coverage area of ​​the blocking part along the circumferential direction of the housing is greater than that of the blocking part, allowing the blocking part to slide relative to the blocking part along the circumferential direction of the housing. When the handle moves relative to the housing, the blocking part can move relative to the blocking part along the extension direction Z of the operating port, avoiding jamming caused by structural interference and ensuring smooth operation of the handle.

[0015] In some embodiments, the barrier further includes a handle sleeve, which is fixedly connected to the cover plate and is sleeved on the operating part.

[0016] In this embodiment, during use, the user can hold the handle sleeve and apply circumferential force to achieve circumferential movement of the handle and the blocking component, thereby improving the ease of operation and comfort.

[0017] In some embodiments, the blocking portion includes two first baffles spaced apart from each other along the extension direction of the operating port and two second baffles spaced apart from each other along the axial direction of the housing. The two second baffles extend along the extension direction of the operating port, and the two first baffles are located between the two second baffles and connected to each other to form a blocking ring.

[0018] In this embodiment, the two first baffles and the two second baffles are connected to each other to form a closed blocking part. The blocking part is arranged around the periphery of the operating port to form a protective barrier to prevent rainwater and other foreign objects from entering.

[0019] In some embodiments, at the intersection of the first baffle and the outer peripheral surface of the housing, the angle between the tangent direction of the outer peripheral surface of the housing and the extending direction of the outer side surface of the first baffle is less than or equal to 90 degrees.

[0020] In this embodiment, at the intersection of the first baffle and the outer peripheral surface of the housing, the angle between the tangent direction of the outer peripheral surface of the housing and the extending direction of the outer side of the first baffle is configured to be less than or equal to 90°, causing the outer side of the first baffle to form an outwardly inclined or vertical guide surface. When rainwater or other liquids flowing along the outer surface of the housing come into contact with the first baffle, their flow direction can be directed towards the outside of the housing, thereby moving them away from the operating port area and preventing rainwater or other liquids from entering the operating port through the gap between the first baffle and the cover plate.

[0021] In other words, if the angle between the tangent direction of the outer peripheral surface of the shell and the extension direction of the first baffle is large, rainwater and other liquids from the outer peripheral surface of the shell can easily flow along the outer side of the first baffle to the operating port, thereby causing the risk of water immersion.

[0022] In some embodiments, the first baffle includes an arcuate surface connected to the outer surface of the housing, and the arcuate surface is recessed in the direction of the operating port to form a guide groove extending in a direction parallel to the axial direction of the housing.

[0023] In this embodiment, when rainwater or other liquids enter the area between the barrier and the blocking part through the gap between the barrier and the outer surface of the shell, some of the rainwater or other liquids can flow in a radial direction parallel to the shell under the guiding effect of the flow channel, and finally flow out through the gap between the barrier and the outer surface of the shell under its own gravity, thus avoiding water accumulation.

[0024] In some embodiments, the barrier includes two first partitions spaced apart from each other along the extension direction of the operating port and two second partitions spaced apart from each other along the axial direction of the housing. The two first partitions are located between the two second partitions and are connected to each other to form a barrier ring. A flow channel is formed between the second partitions and the adjacent second baffle, and the flow channel is connected to the flow groove.

[0025] In this embodiment, by providing a flow guide groove on the first baffle and forming a flow guide channel between the second baffle and the second partition, some rainwater and other liquids that enter from the gap between the outer surface of the housing and the barrier can flow along the flow guide groove to the flow guide channel and flow out to the outside under their own gravity, thus avoiding water accumulation in the area between the barrier and the barrier and further preventing rainwater and other liquids from flowing into the brake or motor from the operating port.

[0026] The present invention also solves its technical problem by adopting the following technical solution: providing a driving device, including the brake as described in any of the above embodiments; and a motor, wherein the brake is installed at the end of the motor away from the transmission end;

[0027] The handle can drive the braking mechanism to switch between locked and unlocked states along the extension direction of the operating port;

[0028] When the braking mechanism is in the locked state, the braking mechanism is locked to the drive shaft of the motor;

[0029] When the braking mechanism is in the unlocked state, the braking mechanism is separated from the drive shaft of the motor.

[0030] In this embodiment, the handle can drive the braking mechanism to switch between a locked state and an unlocked state. When the braking mechanism is in the locked state, it is locked to the drive shaft of the motor, thereby braking the motor. When the braking mechanism is in the unlocked state, it is disengaged from the drive shaft of the motor, allowing the motor to operate normally.

[0031] In some embodiments, the drive device further includes a seal;

[0032] The housing is fixedly connected to the end cover of the motor; the sealing element is disposed between the end cover and the housing, and the two ends of the sealing element abut against the end cover and the housing respectively.

[0033] In this embodiment, on the one hand, the seal can seal the gap between the motor end cover and the housing, preventing rainwater and other foreign objects from entering the brake or motor. On the other hand, since a seal is provided between the motor end cover and the housing, there is no need to provide a sealing structure between the motor drive shaft and the end cover, which facilitates assembly.

[0034] The present invention also employs the following technical solution to solve its technical problem: providing an electric wheelchair, including the drive device described in any of the above embodiments.

[0035] Since the electric wheelchair includes the drive device described in the above embodiments, it also has the beneficial effects described in the above embodiments, which will not be repeated here. Attached Figure Description

[0036] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0037] Figure 1This is an exploded view of the brake in one embodiment of the present invention;

[0038] Figure 2 This is a three-dimensional structural diagram of the shell in an embodiment of this utility model;

[0039] Figure 3 This is a three-dimensional structural schematic diagram of the barrier component in the embodiment of this utility model;

[0040] Figure 4 This is a schematic diagram of the cutaway structure of the brake in an embodiment of this utility model;

[0041] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0042] Figure 6 This is a cross-sectional structural diagram of the brake in an embodiment of the present invention from another perspective;

[0043] Figure 7 yes Figure 6 A magnified view of a section at point A in the middle;

[0044] Figure 8 This is a three-dimensional structural diagram of the driving device in an embodiment of this utility model;

[0045] Figure 9 This is a cross-sectional structural diagram of the drive device at the connection between the motor and the brake in an embodiment of this utility model.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Brake; 10. Housing; 11. Operating port; 12. Blocking part; 121. First baffle; 1210. Arc-shaped surface; 1211. Guide channel; 122. Second baffle; 13. Bottom wall; 14. Side wall; 20. Braking mechanism; 30. Handle; 31. Operating part; 40. Barrier; 41. Cover plate; 42. Barrier; 421. First partition; 422. Second partition; 4220. Guide channel; 43. Handle sleeve; 200. Drive device; 201. Motor; 202. End cap; 203. Seal. Detailed Implementation

[0048] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "upper end," "lower end," "top," and "bottom," etc., used in this specification, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0050] In existing technology, brakes mainly consist of a housing, a braking mechanism, and an operating handle. The housing has an operating port, the braking mechanism is located inside the housing, one end of the operating handle is connected to the braking mechanism, and the other end extends to the outside of the housing through the operating port. The operating handle controls the engagement state between the brake assembly and the motor's drive shaft, enabling locking or disengagement of the motor's drive shaft. In actual use, rainwater or other foreign objects can easily enter the brake through the operating port, affecting its normal operation and reducing its service life.

[0051] To address the aforementioned problems in the prior art, this utility model provides a brake, a drive device, and an electric wheelchair. By providing a blocking portion protruding from the outer wall of the housing and a blocking member with a blocking portion, both the blocking portion and the blocking portion can prevent rainwater and other foreign objects from entering the brake and motor through the operating port, thereby effectively preventing rainwater and other foreign objects from entering the brake or motor, ensuring the normal operation of the brake and motor, and extending their service life. Furthermore, at the intersection of the first baffle and the outer peripheral surface of the housing, the angle between the tangent direction of the outer peripheral surface of the housing and the extending direction of the outer side of the first baffle is configured to be less than or equal to 90 degrees. This makes the first baffle form an outwardly inclined or vertical flow-guiding structure. When some rainwater or other liquids flow along the outer peripheral surface of the housing towards the first baffle, they are guided to the outside of the housing, thus moving away from the operating port and preventing rainwater or other liquids from entering the operating port through the gap between the first baffle and the cover plate. Furthermore, by providing a guide groove on the first baffle and forming a guide channel between the second baffle and the second partition, some rainwater and other liquids that enter from the gap between the outer surface of the housing and the barrier can flow along the guide groove to the guide channel and flow out to the outside under their own gravity, thus avoiding water accumulation in the area between the barrier and the barrier and further preventing rainwater and other liquids from flowing into the brake or motor from the operating port.

[0052] The following will be combined with the appendix Figures 1 to 9 The brake 100, drive device 200 and electric wheelchair provided in the embodiments of this utility model are described in detail.

[0053] Please see Figures 1 to 3 This utility model provides a brake 100, including a housing 10, a brake mechanism 20, a handle 30, and a blocking member 40.

[0054] An operating port 11 and a blocking part 12 surrounding the operating port 11 are provided on the outer side wall 14 of the housing 10. The brake mechanism 20 is located inside the housing 10. One end of the handle 30 is connected to the brake mechanism 20, and the other end of the handle 30 passes through the operating port 11 and extends to the outside of the housing 10 to form an operating part 31. The handle 30 can reciprocate relative to the housing 10 along the extension direction Z of the operating port 11, thereby driving the brake mechanism 20 to switch between locked and unlocked states. A part of the blocking member 40 is sleeved on the operating part 31, and the other part of the blocking member 40 covers the outside of the blocking part 12 and is movably engaged with the blocking part 12.

[0055] like Figure 1 and Figure 2As shown, the housing 10 is typically a hollow cylindrical structure. Specifically, the housing 10 may include a bottom wall 13 and a side wall 14, which together form the housing 10. The braking mechanism 20 is installed inside the housing 10. An operating opening 11 is provided on the side wall 14, and a blocking part 12 protrudes from the outer side wall of the side wall 14. The blocking part 12 may surround the periphery of the operating opening 11. Optionally, the blocking part 12 may be integrally formed with the housing 10.

[0056] The handle 30 can be roughly rod-shaped. One end of the handle 30 can be fixedly connected to the brake mechanism 20 by means of screwing, snap-fitting, etc. The other end of the handle 30 can extend to the outside of the housing 10 through the operating port 11 and form an operating part 31 for user operation. The operating port 11 can be an arc-shaped opening. When the user pushes or pulls the handle 30, the operating port 11 provides space for the handle 30 to move relative to the housing 10, so that the handle 30 can move along the extending direction of the operating port 11 (e.g., ...). Figure 1 The brake mechanism 20 (as shown in the Z direction) reciprocates relative to the housing 10, thereby driving the brake mechanism 20 to switch between locked and unlocked states. It can be understood that the brake mechanism 20 is usually engaged with the drive shaft of the motor 201. When the brake mechanism 20 is in the locked state, the brake mechanism 20 and the drive shaft of the motor 201 are locked together, thereby braking the motor 201. When the brake mechanism 20 is in the unlocked state, the brake mechanism 20 is separated from the drive shaft of the motor 201, allowing the motor 201 to operate normally.

[0057] The braking mechanism 20 can be an existing electromagnetic braking mechanism or other structure, which is existing technology and will not be described in detail here.

[0058] A portion of the barrier 40 is fitted onto the operating part 31, allowing the barrier 40 to move relative to the housing 10 as the handle 30 moves. Another portion of the barrier 40 covers the outside of the blocking part 12, preventing rainwater and other foreign objects from entering the brake 100 through the operating port 11. This other portion of the barrier 40 is movably engaged with the blocking part 12; when the handle 30 moves relative to the housing 10, this other portion of the barrier 40 can move relative to the blocking part 12, preventing jamming due to structural interference and ensuring smooth operation of the handle.

[0059] In this embodiment, a blocking portion 12 is provided on the outer side wall of the housing 10, and the blocking portion 12 is arranged around the outer periphery of the operating port 11. This prevents rainwater and other foreign objects from flowing into the operating port 11 along the outer side wall 14 of the housing 10, thus preventing rainwater and other foreign objects from entering the brake 100 and motor 201 through the operating port 11, ensuring the normal operation of the brake 100 and motor 201, and extending their service life. Furthermore, the barrier 40 combined with the blocking portion 12 can provide double protection against rainwater and other foreign objects, effectively preventing rainwater and other foreign objects from entering the brake and motor through the operating port, thereby effectively preventing rainwater and other foreign objects from entering the brake or motor, ensuring the normal operation of the brake and motor, and extending their service life.

[0060] In some embodiments, the barrier 40 includes a cover plate 41 and a barrier portion 42 disposed around the periphery of the cover plate 41. The barrier portion 42 extends toward the housing 10 and covers the outside of the blocking portion 12 and is clearance-fitted with the blocking portion 12 so that the barrier portion 42 can reciprocate relative to the blocking portion 12 in the extension direction Z of the operating port 11.

[0061] like Figure 1 and Figure 3 As shown, the barrier 40 includes a cover plate 41 and a barrier portion 42. Optionally, the cover plate 41 and the barrier portion 42 can be an integrally formed structure. The cover plate 41 is located directly above the operating port 11 and is used to block the space above the operating port 11. The barrier portion 42 extends toward the housing 10 and covers the outside of the blocking portion 12, which can effectively prevent rainwater or foreign objects from flowing into the operating port 11 along the surface of the housing 10. Moreover, the barrier portion 42 and the blocking portion 12 are in clearance fit, so that the barrier portion 42 can smoothly reciprocate relative to the blocking portion 12 along the extension direction of the operating port 11, thereby allowing the braking mechanism 20 to switch between the locked state and the unlocked state.

[0062] In this embodiment, the barrier 42 and the blocking part 12 can form a double protective barrier. Under the blocking effect of the barrier 42, most rainwater or foreign objects can be effectively blocked from directly entering the operation port 11. Even if a small amount of rainwater or foreign objects seep into the area between the barrier 42 and the blocking part 12 through the gap between the barrier 42 and the outer surface of the housing 10, they can still be intercepted a second time by the blocking part 12, thereby minimizing the entry of rainwater or foreign objects into the operation port 11 and significantly improving waterproof performance and reliability.

[0063] The blocking part 42 and the blocking part 12 are clearance-fitted. The circumferential coverage area of ​​the blocking part 42 along the circumferential direction of the housing 10 is greater than that of the blocking part 12 along the circumferential direction of the housing 10, allowing the blocking part 42 to slide relative to the blocking part 12 along the circumferential direction of the housing 10. When the handle 30 moves along the circumferential direction of the housing 10, the handle 30 can drive the blocking part 42 to move along the extension direction of the operating port 11, avoiding jamming caused by structural interference and ensuring the smooth operation of the handle 30.

[0064] In some embodiments, the barrier 40 further includes a handle sleeve 43, which is connected to the cover plate 41 and is sleeved on the operating part 31.

[0065] like Figure 3 As shown, the handle sleeve 43, cover plate 41, and blocking part 42 can be integrally formed. The handle sleeve 43 can be a hollow rod-shaped structure. The handle sleeve 43 is sleeved on the operating part 31 of the handle 30. The inner cavity of the handle sleeve 43 can be fixed to the end of the handle 30 through interference fit or snap-fit ​​structure to ensure synchronous movement of the blocking part 40 and the handle 30 during operation.

[0066] When in use, the user can hold the handle sleeve 43 and apply circumferential force to achieve relative movement between the handle 30 and the barrier 40 and the housing 10, thereby improving the ease of operation and comfort.

[0067] Please see Figures 4 to 7 In some embodiments, there is a gap between the blocking part 42 and the outer surface of the housing 10, which can prevent contact friction between the blocking part 42 and the housing 10 when the handle 30 is rotated, and ensure the smooth operation and stability of the handle 30.

[0068] In some embodiments, there is a gap between the blocking part 12 and the cover plate 41, which can prevent contact friction between the blocking part 12 and the cover plate 41 when the handle 30 is rotated, and further ensure the smooth operation and stability of the handle 30.

[0069] In some embodiments, the barrier portion 42 may abut against the outer surface of the housing 10, thereby improving the waterproof sealing performance between the barrier portion 42 and the outer surface of the housing 10 and reducing the entry of rainwater and other foreign objects into the area between the barrier portion 42 and the blocking portion 12 through the gap between the barrier portion 42 and the housing 10.

[0070] In some embodiments, the blocking part 12 and the cover plate 41 can abut against each other, thereby improving the waterproof sealing performance between the blocking part 12 and the cover plate 41 and preventing rainwater from entering the operating port 11 through the gap between the blocking part 12 and the cover plate 41.

[0071] In some embodiments, the blocking portion 12 includes two first baffles 121 that are spaced apart from each other along the extension direction Z of the operating port 11, and two second baffles 122 that are spaced apart from each other along the axial direction of the housing 10. The two second baffles 122 extend along the extension direction Z of the operating port 11, and the two first baffles 121 are located between the two second baffles 122 and are connected to each other to form a blocking ring.

[0072] like Figure 2 As shown, the two first baffles 121 and the two second baffles 122 are connected end to end to form a closed blocking ring. The blocking ring is set around the periphery of the operating port 11 to form a protective barrier to prevent rainwater and other foreign objects from entering.

[0073] like Figure 5 As shown, in some embodiments, at the intersection of the first baffle 121 and the outer peripheral surface of the housing 10, the angle α between the tangent direction of the outer peripheral surface of the housing 10 and the extending direction of the outer side surface of the first baffle 121 is less than or equal to 90 degrees, for example, 45 degrees, 60 degrees, 90 degrees, etc.

[0074] Because the angle α between the tangent direction of the outer peripheral surface of the housing 10 and the extending direction of the outer side surface of the first baffle 121 at the intersection of the first baffle 121 and the outer peripheral surface of the housing 10 is configured to be less than or equal to 90°, the outer side surface of the first baffle 121 forms an outwardly inclined or vertical guide surface. When rainwater or other liquids flowing along the outer surface of the housing 10 come into contact with the first baffle 121, their flow direction can be directed towards the outside of the housing 10, thereby moving away from the operating port 11 area and preventing rainwater or other liquids from entering the operating port 11 through the gap between the first baffle 121 and the cover plate 41.

[0075] In other words, if the angle between the tangent direction of the outer peripheral surface of the housing 10 and the extension direction of the outer side of the first baffle 121 is large, rainwater and other liquids on the outer peripheral surface of the housing 10 can easily flow along the outer side of the first baffle 121 into the operating port 11, thereby causing the risk of water immersion.

[0076] like Figure 2 and Figure 5 As shown, in some embodiments, the first baffle 121 includes an arcuate surface 1210, which is connected to the outer surface of the housing 10. The arcuate surface 1210 is recessed toward the operation port 11 to form a guide groove 1211 extending in a direction parallel to the axial direction of the housing 10.

[0077] When rainwater or other liquids enter the area between the barrier 42 and the blocking part 12 through the gap between the barrier 42 and the outer surface of the housing 10, some of the rainwater or other liquids can flow along the extension direction parallel to the operating port 11 under the guiding action of the guide channel 1211, and finally flow out through the gap between the barrier 42 and the outer surface of the housing 10 under its own gravity, thus avoiding water accumulation.

[0078] like Figure 5 and Figure 7 As shown, in some embodiments, the barrier portion 42 includes two first partitions 421 that are spaced apart relative to each other along the extension direction Z of the operating port 11 and two second partitions 422 that are spaced apart relative to each other along the axial direction of the housing 10. The two first partitions 421 are located between the two second partitions 422 and are connected to each other to form a barrier ring to prevent rainwater and other foreign objects from entering. The second partitions 422 and the adjacent second baffles 122 form a flow channel 4220, which is connected to the flow groove 1211.

[0079] In this embodiment, by providing a guide groove 1211 on the first baffle 121 and forming a guide channel 4220 between the second baffle 122 and the second partition 422, some rainwater and other liquids that enter from the gap between the outer surface of the housing 10 and the barrier 42 can flow along the guide groove 1211 to the guide channel 4220 and flow out to the outside under their own gravity, thus avoiding water accumulation in the area between the barrier 12 and the barrier 42, and further preventing rainwater and other liquids from flowing into the brake 100 or motor 201 from the operating port 11.

[0080] Please see Figure 8 and Figure 9 Based on the same inventive concept, this utility model embodiment also provides a drive device 200, including the brake 100 in any of the above embodiments; and a motor 201, wherein the brake 100 is installed at the end of the motor 201 away from the transmission end.

[0081] The handle 30 can drive the brake mechanism 20 to switch between a locked state and an unlocked state along the extension direction Z of the operating port 11. When the brake mechanism 20 is in the locked state, it is locked to the drive shaft of the motor 201, thereby braking the motor 201. When the brake mechanism 20 is in the unlocked state, it is disengaged from the drive shaft of the motor 201, allowing the motor 201 to operate normally.

[0082] Optionally, the braking mechanism 20 may include a transmission component, a brake pad, and an elastic element. The transmission component is connected to the handle 30 and the brake pad respectively. When the handle 30 drives the brake pad to the locked state through the transmission component, the transmission component can push the brake pad to press against the drive shaft of the motor 201, thereby locking the drive shaft through friction. When the handle 30 drives the brake pad to the unlocked state through the transmission component, the elastic element can pull the brake pad away from the drive shaft, allowing the drive shaft of the motor 201 to rotate freely.

[0083] The handle 30 can drive the brake pads to switch between locked and unlocked states via the transmission component. When the brake pads are in the locked state, they are locked to the transmission shaft of the motor 201. When the brake pads are in the unlocked state, they are separated from the transmission shaft of the motor 201, allowing the motor 201 to operate normally.

[0084] Optionally, the transmission component can be a linkage structure or a cam structure, and the elastic element can be a spring.

[0085] In some embodiments, the drive device 200 further includes a seal 203. The housing 10 is fixedly connected to the end cover 202 of the motor 201. The seal 203 is disposed between the end cover 202 and the housing 10, and the two ends of the seal 203 abut against the end cover 202 and the housing 10, respectively.

[0086] The seal 203 can be ring-shaped and can be made of materials with good sealing performance, such as silicone or rubber.

[0087] The housing 10 and the end cover 202 of the motor 201 can be fixedly connected by fasteners such as bolts and screws. By tightening the fasteners, the seal 203 can be pressed between the end cover 202 and the housing 10 to ensure the sealing performance between the two.

[0088] On the one hand, the seal 203 can seal the gap between the end cover 202 of the motor 201 and the housing 10, preventing rainwater and other foreign objects from entering the brake 100 or the motor 201. On the other hand, since the seal 203 is provided between the end cover 202 of the motor 201 and the housing 10, there is no need to provide a sealing structure at the drive shaft of the motor 201 and the end cover 202, which facilitates assembly.

[0089] Based on the same inventive concept, this utility model embodiment also provides an electric wheelchair, which includes the drive device 200 in the above embodiments. Since the electric wheelchair includes the drive device 200 in the above embodiments, it also has the beneficial effects of the above embodiments, which will not be repeated here.

[0090] Specifically, the drive unit 200 can be installed on the wheel of the electric wheelchair, and the drive unit 200 can drive the rotation of the wheel.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A brake (100), characterized in that, include: The housing (10) has an operation port (11) and a blocking part (12) arranged around the operation port on its outer side wall (14); Braking mechanism (20), the braking mechanism (20) is disposed inside the housing (10); A handle (30) is provided, one end of which is connected to the brake mechanism (20), and the other end of which passes through the operating port (11) and extends to the outside of the housing (10) to form an operating part (31). The handle (30) is capable of reciprocating relative to the housing (10) along the extending direction of the operating port (11). A barrier (40) is provided, with one part of the barrier (40) sleeved on the operating part (31) and the other part of the barrier (40) covering the outside of the blocking part (12) and movably engaging with the blocking part (12).

2. The brake (100) according to claim 1, characterized in that, The barrier (40) includes a cover plate (41) and a barrier portion (42) surrounding the periphery of the cover plate (41). The barrier portion (42) extends toward the housing (10) and covers the outside of the blocking portion (12) and is in clearance fit with the blocking portion (12) so that the barrier portion (42) can reciprocate relative to the blocking portion (12) along the extension direction of the operating port (11).

3. The brake (100) according to claim 2, characterized in that, The barrier (40) also includes a handle sleeve (43), which is connected to the cover plate (41) and is sleeved on the operating part (31).

4. The brake (100) according to claim 2, characterized in that, The blocking part (12) includes two first baffles (121) that are spaced apart from each other along the extension direction of the operating port (11) and two second baffles (122) that are spaced apart from each other along the axial direction of the housing (10). The two second baffles (122) extend along the extension direction of the operating port (11), and the two first baffles (121) are located between the two second baffles (122) and are connected to each other to form a blocking ring.

5. The brake (100) according to claim 4, characterized in that, At the intersection of the first baffle (121) and the outer peripheral surface of the housing (10), the angle between the tangent direction of the outer peripheral surface of the housing (10) and the extending direction of the outer side surface of the first baffle (121) is less than or equal to 90 degrees.

6. The brake (100) according to claim 4, characterized in that, The first baffle (121) includes an arc-shaped surface (1210), which is connected to the outer surface of the housing (10). The arc-shaped surface (1210) is recessed toward the operation port (11) to form a guide groove (1211) extending in a direction parallel to the axial direction of the housing (10).

7. The brake (100) according to claim 6, characterized in that, The barrier section (42) includes two first partitions (421) that are spaced apart from each other along the extension direction of the operating port (11) and two second partitions (422) that are spaced apart from each other along the axial direction of the housing (10). The two first partitions (421) are located between the two second partitions (422) and are connected to each other to form a barrier ring. The second partitions (422) and the adjacent second baffles (122) form a flow channel (4220) at intervals. The flow channel (4220) is connected to the flow groove (1211).

8. A driving device (200), characterized in that, Includes a brake (100) and a motor (201) as described in any one of claims 1-7, wherein the brake (100) is mounted on the end of the motor (201) away from the transmission end; The handle (30) can drive the brake mechanism (20) to switch between locked and unlocked states along the extension direction of the operating port (11); When the brake mechanism (20) is in the locked state, the brake mechanism (20) is locked to the drive shaft of the motor (201); When the brake mechanism (20) is in the unlocked state, the brake mechanism (20) is separated from the drive shaft of the motor (201).

9. The driving device (200) according to claim 8, characterized in that, The drive unit (200) also includes a seal (203); The housing (10) is fixedly connected to the end cover (202) of the motor (201); the sealing element (203) is disposed between the end cover (202) and the housing (10), and the two ends of the sealing element (203) abut against the end cover (202) and the housing (10) respectively.

10. An electric wheelchair, characterized in that, Includes the drive device (200) as described in claim 8 or 9.

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