Lightweight drive motor for electrically powered wheelchair

Abstract

This invention discloses a lightweight drive motor for electric wheelchairs, relating to the field of motor technology. The drive motor includes a motor housing with a mounting groove at its bottom. An upper end cover and a lower end cover are fixedly mounted on the inner wall of the mounting groove. A stator, fixedly mounted on the inner wall of the mounting groove, is located between the upper and lower end covers. A rotating shaft is housed within the stator, with its two ends rotatably connected to the sides of the upper and lower end covers, respectively. A rotor corresponding to the stator is fixedly mounted on the rotating shaft. During deceleration, the pin engages with the slot to quickly fix the rotating ring, causing the deceleration column to rotate and the spring to tighten. The spring force provides flexible buffering deceleration until the rotating block contacts the arc-shaped block for complete positioning. The spring-loaded spring design avoids excessive instantaneous braking force, thus meeting the low-speed and stable operation requirements of electric wheelchairs.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically a lightweight drive motor for electric wheelchairs. Background Technology

[0002] Electric wheelchairs are a common means of transportation for people with mobility impairments. As the core power component, the drive motor directly determines the vehicle's driving performance. When using an electric wheelchair, the safety and smoothness of operation are of paramount importance, and its braking and deceleration performance directly affects the wheelchair's driving status and user experience.

[0003] The current reduction and fixing structure of the drive motor used in electric wheelchairs has obvious defects. For example, the prior art disclosed in CN215186277U is a wheelchair motor with electromagnetic brake, which uses a direct plug-in locking structure for braking. However, the rigid impact force generated instantaneously during use can easily cause the plug shaft to bend or break, making it difficult to protect the braking structure during a single braking process. Therefore, we disclose a lightweight drive motor for electric wheelchairs to solve this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight drive motor for electric wheelchairs to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The drive motor includes a motor housing, a mounting groove is provided at the bottom of the motor housing, an upper end cover and a lower end cover are fixedly mounted on the inner wall of the mounting groove, a stator is fixedly mounted on the inner wall of the mounting groove between the upper end cover and the lower end cover, a rotating shaft is provided inside the stator, the two ends of the rotating shaft are rotatably connected to the sides of the upper end cover and the lower end cover respectively, a rotor corresponding to the stator is fixedly mounted on the rotating shaft, and a reduction column located above the upper end cover is fixedly mounted at the top of the rotating shaft; A buffer mechanism is provided on one side of the deceleration column, and a deceleration mechanism is installed in the mounting groove. The deceleration mechanism is installed in conjunction with the deceleration column and the buffer mechanism. The buffer mechanism includes a rotating ring rotatably sleeved on a deceleration column, a fixed ring fixedly installed at the bottom of the rotating ring, the same spring fixedly installed on the inner ring of the fixed ring and the outer side of the deceleration column, an arc-shaped block fixedly installed at the bottom of the fixed ring, and a rotating block corresponding to the arc-shaped block installed on the side of the deceleration column.

[0006] As a preferred technical solution, the deceleration mechanism includes an extrusion disc slidably installed in an installation groove. Multiple guide posts are fixedly installed at the bottom of the extrusion disc. Multiple guide sleeves are fixedly installed on the inner wall of the installation groove. The multiple guide posts are slidably installed within the multiple guide sleeves. An installation cavity is provided on the motor housing. Extrusion holes are provided on the inner walls of the installation cavity and the installation groove, which are close to each other. An electric telescopic rod is fixedly installed on the bottom inner wall of the installation cavity. The movable end of the electric telescopic rod is fixedly connected to the side of the extrusion disc via an extrusion block. Multiple friction components are installed at the bottom of the extrusion disc. Each of the multiple friction components is equipped with a fixing component and a one-way limiting component.

[0007] As a preferred technical solution, the friction assembly includes a cylinder, and two extrusion columns are fixedly installed on the outer side of the cylinder. A reset unit is installed on the side of the two extrusion columns that are far apart from each other, and the reset unit is connected to the bottom of the extrusion disc. A sliding frame is fixedly installed on one side of the cylinder and mounted on the bottom of the extrusion plate. A sliding column is slidably installed inside the sliding frame. A rectangular hole is opened at the top of the sliding column. Inclined holes are opened on the inner walls of both sides of the rectangular hole. The two extrusion columns are slidably installed in the two inclined holes respectively. A clamping block and a friction block are fixedly installed at the end of the sliding column. The cylinder has a circular groove at the top and at the bottom of the extrusion plate. The top of the cylinder corresponds to the position of the circular groove, and four downward columns are fixedly installed at the bottom of the cylinder.

[0008] As a preferred technical solution, the reset unit includes a reset rod, the top end of which is fixedly installed on the bottom of the extrusion plate, a reset block is slidably sleeved on the reset rod, and a reset spring is sleeved on the reset rod. The two ends of the reset spring are respectively fixedly installed on the sides of the extrusion plate and the reset block that are close to each other, and the end of the extrusion column away from the cylinder is fixedly connected to the side of the reset block.

[0009] As a preferred technical solution, the fixing component includes a pin, a positioning post is fixedly installed at the top center of the pin, a positioning groove is opened at the bottom of the cylinder, the top of the positioning post is slidably installed in the positioning groove and a positioning spring is fixedly installed thereon, the top of the positioning spring is fixedly installed on the top inner wall of the positioning groove, four evenly circumferentially arranged downward sliding grooves are opened on the outer side of the pin, the four downward sliding posts are slidably installed in the four downward sliding grooves respectively, and multiple slots are opened at the top of the rotating ring, with the pin corresponding to the position of the slot.

[0010] As a preferred technical solution, the circle formed by the outer part of the pin coincides with the circle formed by the outer parts of the four downward-moving posts.

[0011] As a preferred technical solution, the unidirectional limiting component includes a fixed sleeve, which is fixedly sleeved on four downward moving posts. A fixed block is fixedly installed on the side of the fixed sleeve, and a deceleration block is fixedly installed on the side of the fixed block away from the fixed sleeve. A compression sleeve is fixedly installed on the outer side of the deceleration post, and a plurality of evenly arranged deceleration grooves are opened on the top of the compression sleeve, with the deceleration grooves corresponding to the positions of the deceleration blocks.

[0012] As a preferred technical solution, a mounting plate is fixedly installed at the bottom of the motor housing, the bottom end of the rotating shaft passes through the mounting plate, and multiple mounting holes are provided at the top of the mounting plate.

[0013] As a preferred technical solution, bearing holes are provided on the sides of the upper and lower end covers that are close to each other, and bearings are fixedly installed in both bearing holes. The rotating shaft is fixedly installed on the inner rings of the two bearings.

[0014] As a preferred technical solution, both ends of the extrusion column are located outside the inclined hole, and the height of the inner wall of the inclined hole near the sliding frame is higher than the height of the inner wall of the inclined hole away from the sliding frame. The deceleration column has an annular groove, and the rotating ring is rotatably installed in the annular groove.

[0015] As a preferred technical solution, four arc-shaped holes are provided on the side of the upper rear cover, and there are four arc-shaped pillars. One end of each of the four arc-shaped pillars passes through the four arc-shaped holes. A sealing shell is fixedly installed on the side of the upper rear cover, and the spoke-type sensor is located inside the sealing shell. The outer side of the explosion-proof housing is evenly provided with multiple heat sinks, and the heat sinks correspond to the opening positions of the shroud.

[0016] Compared with the prior art, the beneficial effects of the present invention are: During deceleration, the pin and slot can quickly fix the rotating ring, causing the deceleration column to rotate and the spring to tighten. The spring force is used to achieve flexible buffer deceleration until the rotating block contacts the arc block to achieve complete positioning. The spring spring can avoid the impact caused by excessive instantaneous braking force, which is suitable for the low-speed and stable use of electric wheelchairs.

[0017] In this device, during the buffering process of the spring, the deceleration block and the deceleration groove form a one-way limiting structure, which can constrain the movement direction of the rotating block and effectively prevent the spring from resetting. At the same time, when the deceleration block is in the limiting position, it will cause the friction block to intermittently squeeze the side of the deceleration column, further reducing the speed of the rotating shaft and improving the deceleration effect. Attached Figure Description

[0018] Figure 1 This is a diagram showing the installation of the invention with the wheels of a motorized wheelchair; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the mounting groove of the motor housing of the present invention; Figure 4 for Figure 2 A schematic diagram of the structure excluding the extrusion disc; Figure 5 for Figure 2 A schematic diagram of the structure excluding the top cover; Figure 6 This is a first-person perspective 3D view showing the connection between the deceleration mechanism and the buffer mechanism; Figure 7 This is a second-view perspective perspective view showing the connection between the deceleration mechanism and the buffer mechanism. Figure 8 This is a schematic diagram showing the structure connecting the extrusion disc, sliding frame, sliding column, clamping block, and friction block. Figure 9 A schematic diagram showing the connection between the fixed component, part of the unidirectional limiting component, the reset unit and the friction component; Figure 10 This is a schematic diagram showing the separation of the stationary component and the friction component.

[0019] In the diagram: 1. Motor housing; 2. Shaft; 3. Mounting slot; 4. Extrusion plate; 5. Electric telescopic rod; 6. Guide sleeve; 7. Deceleration column; 8. Upper end cover; 9. Rotor; 10. Stator; 11. Sliding frame; 12. Arc block; 13. Spring; 14. Rotating block; 15. Fixed ring; 16. Rotating ring; 17. Guide column; 18. Extrusion sleeve; 19. Deceleration groove; 20. Slot; 21. Circular groove; 22. Sliding column; 23. Inclined hole; 24. Clamping block; 25. Friction block; 26. Cylinder; 27. Lowering column; 28. Lowering groove; 29. ​​Pin; 30. Fixed sleeve; 31. Fixed block; 32. Deceleration block; 33. Extrusion column; 34. Reset rod; 35. Reset block; 36. Reset spring; 37. Positioning spring; 38. Positioning column; 39. Positioning groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: Figures 1-10As shown, the present invention provides a technical solution for a lightweight drive motor for an electric wheelchair. The drive motor includes a motor housing 1, a mounting groove 3 at the bottom of the motor housing 1, an upper end cover 8 and a lower end cover fixedly mounted on the inner wall of the mounting groove 3, a stator 10 fixedly mounted on the inner wall of the mounting groove 3 between the upper end cover 8 and the lower end cover, a rotating shaft 2 inside the stator 10, the two ends of the rotating shaft 2 being rotatably connected to the sides of the upper end cover 8 and the lower end cover respectively, a rotor 9 corresponding to the stator 10 fixedly mounted on the rotating shaft 2, and a reduction column 7 located above the upper end cover 8 fixedly mounted at the top of the rotating shaft 2. A buffer mechanism is provided on one side of the deceleration column 7, and a deceleration mechanism is installed in the mounting groove 3. The deceleration mechanism is installed in conjunction with the deceleration column 7 and the buffer mechanism. The buffer mechanism includes a rotating ring 16 rotatably sleeved on the deceleration column 7. A fixed ring 15 is fixedly installed at the bottom of the rotating ring 16. The same spring 13 is fixedly installed on the inner ring of the fixed ring 15 and the outer side of the deceleration column 7. An arc-shaped block 12 is fixedly installed at the bottom of the fixed ring 15. A rotating block 14 corresponding to the arc-shaped block 12 is installed on the side of the deceleration column 7. By setting the rotating block 14 and the arc-shaped block 12, the deceleration column 7 can be blocked and positioned after being buffered to the other side of the arc-shaped block 12. The rotation of the deceleration column 7 causes the spring 13 to be tightened, thereby providing buffering.

[0022] With the above structure, when the rotating shaft 2 needs to decelerate, the outer part of the deceleration column 7 can be squeezed and decelerated by the deceleration mechanism. At the same time, after the deceleration mechanism is connected with the buffer mechanism, the deceleration column 7 continues to be buffered by the buffer mechanism. During the buffering process, the deceleration mechanism will intermittently decelerate the deceleration column 7, which facilitates the deceleration of the rotating shaft 2.

[0023] like Figure 2 , Figure 3 and Figure 5 As shown, the deceleration mechanism includes an extrusion disc 4 slidably installed in the mounting groove 3. There is always a distance between the deceleration column 7 and the extrusion disc 4, thus not affecting the downward movement of the extrusion disc 4. Multiple guide columns 17 are fixedly installed at the bottom of the extrusion disc 4. Multiple guide sleeves 6 are fixedly installed on the inner wall of the mounting groove 3, and the multiple guide columns 17 are slidably installed within the multiple guide sleeves 6. An installation cavity is provided on the motor housing 1, and extrusion holes are provided on the inner walls of the installation cavity and the mounting groove 3, which are close to each other. An electric telescopic rod 5 is fixedly installed on the bottom inner wall of the installation cavity. The movable end of the electric telescopic rod 5 is fixedly connected to the side of the extrusion disc 4 through an extrusion block. Multiple friction components are installed at the bottom of the extrusion disc 4, and each friction component is equipped with a fixing component and a one-way limiting component. When deceleration is required, the extrusion disc 4 is extruded downward by activating the electric telescopic rod 5. The extrusion of the extrusion disc 4 drives multiple cylinders 26 and multiple pins 29 to extrude downward.

[0024] like Figures 7-9As shown, the friction assembly includes a cylinder 26, and two extrusion columns 33 are fixedly installed on the outer side of the cylinder 26. A reset unit is installed on the side of the two extrusion columns 33 that are far apart from each other. The reset unit is connected to the bottom of the extrusion disc 4. A sliding frame 11 is fixedly installed on one side of the cylinder 26 and is fixedly installed on the bottom of the extrusion plate 4. A sliding column 22 is slidably installed inside the sliding frame 11. A rectangular hole is opened on the top of the sliding column 22. Inclined holes 23 are opened on the inner walls of both sides of the rectangular hole. Two extrusion columns 33 are slidably installed in the two inclined holes 23 respectively. A clamping block 24 and a friction block 25 are fixedly installed at the end of the sliding column 22. The friction block 25 corresponds to the position of the deceleration column 7. A circular groove 21 is provided above the cylinder 26 at the bottom of the extrusion plate 4. The top of the cylinder 26 corresponds to the position of the circular groove 21. Four downward moving posts 27 are fixedly installed at the bottom of the cylinder 26. When the bottom of the pin 29 is on the same horizontal plane as the downward moving posts 27, the positioning spring 37 undergoes maximum deformation, and the return spring 36 deforms. This may cause the cylinder 26 to move slightly. At this time, the friction block 25 has not yet squeezed the side of the deceleration post 7. The extrusion plate 4 continues to squeeze, causing the downward moving posts 27 and the cylinder 26 to squeeze upward. The compression of the cylinder 26 drives the two extrusion posts 33 to slide in the two inclined holes 23 respectively. The two extrusion posts 33 squeeze the inner walls of the two inclined holes 23, causing the sliding post 22 to squeeze. The squeezing of the sliding post 22 drives the clamping block 24 and the friction block 25 to squeeze. The friction block 25 can squeeze the deceleration post 7 connected to the top of the rotating shaft 2.

[0025] like Figure 8 As shown, the reset unit includes a reset rod 34, the top of which is fixedly mounted on the bottom of the extrusion plate 4. A reset block 35 is slidably sleeved on the reset rod 34, and a reset spring 36 is sleeved on the reset rod 34. The two ends of the reset spring 36 are respectively fixedly mounted on the sides of the extrusion plate 4 and the reset block 35 that are close to each other. The end of the extrusion column 33 away from the cylinder 26 is fixedly connected to the side of the reset block 35. The two extrusion columns 33 extrude and drive the two reset blocks 35 to extrude, and the two reset springs 36 are compressed. Under the reaction force of the reset springs 36, the reset block 35 can be reset.

[0026] like Figure 8 and Figure 9As shown, the fixing assembly includes a pin 29, a positioning post 38 fixedly installed at the top center of the pin 29, a positioning groove 39 formed at the bottom of the cylinder 26, a positioning spring 37 fixedly installed at the top of the positioning post 38 within the positioning groove 39, and the top of the positioning spring 37 fixedly installed on the inner wall of the top side of the positioning groove 39. Four evenly spaced downward sliding grooves 28 are formed on the outer side of the pin 29, and four downward sliding posts 27 are slidably installed within the four downward sliding grooves 28 respectively. Multiple slots 20 are formed at the top of the rotating ring 16, with the pin 29 corresponding to the slots 20. When the pin 29 corresponds to the slot 20, the pin 29 is inserted into the slot 20 under the reaction force of the positioning spring 37.

[0027] like Figure 8 As shown, the circle formed by the outer part of the pin 29 coincides with the circle formed by the outer parts of the four downward moving posts 27. The advantage of this arrangement is that when the deceleration block 32 is squeezed upward, causing the four downward moving posts 27 to be squeezed upward out of the slot 20, the four downward moving posts 27 can still be inserted into the corresponding slot 20 and the four downward moving grooves 28 during the subsequent squeezing.

[0028] like Figure 8 and Figure 9As shown, the one-way limiting component includes a fixed sleeve 30, which is fixedly sleeved on four downward moving posts 27. A fixed block 31 is fixedly installed on the side of the fixed sleeve 30. A deceleration block 32 is fixedly installed on the side of the fixed block 31 away from the fixed sleeve 30. A compression sleeve 18 is fixedly installed on the outer side of the deceleration post 7. The top of the compression sleeve 18 has multiple evenly arranged deceleration grooves 19. The deceleration grooves 19 correspond to the positions of the deceleration blocks 32. The shapes of the deceleration grooves 19 and the deceleration blocks 32 are arc-shaped right-angled triangles. The advantage of this arrangement is that the deceleration blocks 32 can only rotate in one direction along the annular side of the deceleration post 7. When the deceleration blocks 32 rotate, they always correspond to the positions of the deceleration grooves 19, thereby realizing the up and down compression of the deceleration blocks 32. The rotation of the deceleration column 7 drives the compression sleeve 18 to rotate. Since the deceleration block 32 corresponds to the deceleration groove 19, when the inclined inner wall of the deceleration groove 19 presses the inclined side of the deceleration block 32 to make it position at the top of the compression sleeve 18, the deceleration block 32 will be pressed upward, which in turn drives the downward column 27, cylinder 26, compression column 33, and reset block 35 to be pressed upward. The continued pressing of the compression column 33 will cause the friction block 25 to press the side of the deceleration column 7, and the reset spring 36 will continue to be compressed. When the deceleration block 32 corresponds to the next deceleration groove 19, the reaction force of the reset spring 36 will continue to cause the deceleration block 32 to be pressed downward to correspond to the deceleration groove 19, so that the friction block 25 no longer presses the side of the deceleration column 7. By the deceleration block 32 entering different deceleration grooves 19, the position of the rotating ring 16 can be unidirectionally limited. At the same time, the inclined inner wall of different deceleration grooves 19 can be used to make the friction block 25 intermittently press the side of the deceleration column 7, thereby achieving the effect of intermittent braking and facilitating the deceleration of the rotating shaft 2.

[0029] like Figures 1-4 As shown, a mounting plate is fixedly installed on the bottom of the motor housing 1, and the bottom end of the rotating shaft 2 passes through the mounting plate. Multiple mounting holes are provided on the top of the mounting plate. In use, the mounting plate can be installed on the electric wheelchair, and then the rotating shaft 2 of the motor can be connected to the wheels of the electric wheelchair, allowing the wheels to rotate.

[0030] like Figure 2 As shown, bearing holes are provided on the sides of the upper end cover 8 and the lower end cover that are close to each other. Bearings are fixedly installed in both bearing holes, and the rotating shaft 2 is fixedly installed on the inner rings of the two bearings. The upper end cover 8 and the lower end rod are designed to allow the rotating shaft 2 to be installed.

[0031] like Figure 5 As shown, both ends of the extrusion column 33 are located outside the inclined hole 23, and the height of the inner wall of the inclined hole 23 near the sliding frame 11 is higher than the height of the inner wall of the inclined hole 23 away from the sliding frame 11. The advantage of this setting is that when the extrusion column 33 extrudes upward, it will drive the sliding column 22 to approach the deceleration column 7.

[0032] The deceleration column 7 has an annular groove, and the rotating ring 16 is rotatably installed in the annular groove. The annular groove limits the rotation of the rotating ring 16, allowing it to rotate only.

[0033] Working principle of the invention: When deceleration is required, the electric telescopic rod 5 is activated to cause the extrusion disc 4 to press downwards. The extrusion disc 4 presses downwards, causing multiple cylinders 26 and multiple pins 29 to press downwards. When the pins 29 contact the top of the rotating ring 16, the top of the rotating ring 16 presses the pins 29, causing them to press downwards. The pressing of the pins 29 causes the positioning pins 38 to press downwards, compressing the positioning spring 37. When the bottom end of the pins 29 is on the same horizontal plane as the lowering column 27, the extrusion disc 4 continues to press, causing the lowering column 27 and cylinders 26 to press upwards. The cylinders 26 press downwards... The two extrusion columns 33 slide within the two inclined holes 23 respectively. The two extrusion columns 33 press against the inner walls of the two inclined holes 23, causing the sliding column 22 to press. The pressing of the sliding column 22 causes the clamping block 24 and the friction block 25 to press. The friction block 25 can press against the deceleration column 7 connected to the top of the rotating shaft 2, thereby decelerating the deceleration column 7 and the rotating shaft 2. At this time, the bottom of the deceleration block 32 is exactly on the same plane as the top of the extrusion sleeve 18. The pressing of the two extrusion columns 33 causes the two reset blocks 35 to press, and the two reset springs 36 are compressed. When the pin 29 corresponds to the slot 20, the pin 29 is inserted into the slot 20 under the reaction force of the positioning spring 37. At the same time, the downward moving column 27 enters the rotating ring 16 under the action of the two return springs 36. The downward moving column 27 presses downward, causing the fixing sleeve 30, fixing block 31, deceleration block 32, cylinder 26 and two pressing columns 33 to move away from the pressing plate 4. The two pressing columns 33 slide in opposite directions in the two inclined holes 23, so that the friction block 25 moves backward and no longer presses the outer part of the deceleration column 7. At the same time, the deceleration block 32 descends to the position corresponding to the deceleration groove 19. At this time, the rotating ring 16 is fixed and cannot rotate with the deceleration column 7. The rotation of the deceleration column 7 causes the spring spring 13 to be tightened, thereby providing buffering. Simultaneously, the rotation of the deceleration column 7 drives the compression sleeve 18 to rotate. Since the deceleration block 32 corresponds to the deceleration groove 19, when the inclined inner wall of the deceleration groove 19 presses the inclined side of the deceleration block 32 to make it position at the top of the compression sleeve 18, the deceleration block 32 will be pressed upward, thereby driving the downward column 27, cylinder 26, compression column 33, and reset block 35 to be pressed upward. The continued pressing of the compression column 33 will cause the friction block 25 to press the side of the deceleration column 7, and the reset spring 36 will continue to be compressed. When the deceleration block 32 corresponds to the next deceleration groove 19, under the reaction force of the reset spring 36, the deceleration block 32 will continue to be pressed downward to correspond to the deceleration groove 19, so that the friction block 25 no longer presses the side of the deceleration column 7. By the deceleration block 32 entering different deceleration grooves 19, the position of the rotating ring 16 can be unidirectionally limited. At the same time, the inclined inner wall of different deceleration grooves 19 can be used to make the friction block 25 intermittently press the side of the deceleration column 7, which is convenient for decelerating the rotating shaft 2.

[0034] This drive motor adopts an integrated structure, embedding all driving, deceleration, buffering, and braking functions inside the motor housing. It eliminates the traditional separate external gearbox, independent brake housing, and various external connectors, significantly reducing the number of parts and effectively achieving overall lightweighting. This meets the requirements of electric wheelchairs for low motor weight. The electrical components of this application can be connected to an external power source and can be connected to an external controller via signals. This is prior art and will not be described in detail here.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lightweight drive motor for an electric wheelchair, characterized in that: The drive motor includes a motor housing (1), and a mounting groove (3) is provided at the bottom of the motor housing (1). An upper end cover (8) and a lower end cover are fixedly installed on the inner wall of the mounting groove (3). A stator (10) is fixedly installed on the inner wall of the mounting groove (3) between the upper end cover (8) and the lower end cover. A rotating shaft (2) is provided inside the stator (10). The two ends of the rotating shaft (2) are rotatably connected to the sides of the upper end cover (8) and the lower end cover, respectively. A rotor (9) corresponding to the stator (10) is fixedly installed on the rotating shaft (2). A deceleration column (7) located above the upper end cover (8) is fixedly installed at the top of the rotating shaft (2). A buffer mechanism is provided on one side of the deceleration column (7), and a deceleration mechanism is installed in the mounting groove (3). The deceleration mechanism is installed in conjunction with the deceleration column (7) and the buffer mechanism. The buffer mechanism includes a rotating ring (16) rotatably sleeved on the deceleration column (7), a fixed ring (15) fixedly installed at the bottom of the rotating ring (16), the same spring spring (13) fixedly installed on the inner ring of the fixed ring (15) and the outer side of the deceleration column (7), an arc-shaped block (12) fixedly installed at the bottom of the fixed ring (15), and a rotating block (14) corresponding to the arc-shaped block (12) installed on the side of the deceleration column (7).

2. The lightweight drive motor for an electric wheelchair according to claim 1, characterized in that: The deceleration mechanism includes an extrusion plate (4) slidably installed in the mounting groove (3). Multiple guide posts (17) are fixedly installed at the bottom of the extrusion plate (4). Multiple guide sleeves (6) are fixedly installed on the inner wall of the mounting groove (3). The multiple guide posts (17) are slidably installed in the multiple guide sleeves (6). An installation cavity is provided on the motor housing (1). An extrusion hole is provided on the inner wall of the installation cavity that is close to the mounting groove (3). An electric telescopic rod (5) is fixedly installed on the bottom inner wall of the installation cavity. The movable end of the electric telescopic rod (5) is fixedly connected to the side of the extrusion plate (4) through an extrusion block. Multiple friction components are installed at the bottom of the extrusion plate (4). Each of the multiple friction components is equipped with a fixing component and a one-way limiting component.

3. A lightweight drive motor for an electric wheelchair according to claim 2, characterized in that: The friction assembly includes a cylinder (26), on the outer side of which two extrusion columns (33) are fixedly installed. Each of the two extrusion columns (33) has a reset unit installed on its mutually distant sides. The reset unit is connected to the bottom of the extrusion disc (4). A sliding frame (11) is fixedly installed on one side of the cylinder (26) at the bottom of the extrusion plate (4). A sliding column (22) is slidably installed inside the sliding frame (11). A rectangular hole is opened at the top of the sliding column (22). Inclined holes (23) are opened on the inner walls of both sides of the rectangular hole. Two extrusion columns (33) are slidably installed in the two inclined holes (23). A clamping block (24) and a friction block (25) are fixedly installed at the end of the sliding column (22). The cylinder (26) has a circular groove (21) at the bottom of the extrusion plate (4) above it. The top of the cylinder (26) corresponds to the position of the circular groove (21). Four downward columns (27) are fixedly installed at the bottom of the cylinder (26).

4. A lightweight drive motor for an electric wheelchair according to claim 3, characterized in that: The reset unit includes a reset rod (34), the top end of which is fixedly installed on the bottom of the extrusion plate (4). A reset block (35) is slidably sleeved on the reset rod (34). A reset spring (36) is sleeved on the reset rod (34). The two ends of the reset spring (36) are respectively fixedly installed on the sides of the extrusion plate (4) and the reset block (35) that are close to each other. The end of the extrusion column (33) away from the cylinder (26) is fixedly connected to the side of the reset block (35).

5. A lightweight drive motor for an electric wheelchair according to claim 3, characterized in that: The fixing component includes a pin (29), a positioning post (38) is fixedly installed at the top center of the pin (29), a positioning groove (39) is opened at the bottom of the cylinder (26), the top of the positioning post (38) is slidably installed in the positioning groove (39) and a positioning spring (37) is fixedly installed, the top of the positioning spring (37) is fixedly installed on the top inner wall of the positioning groove (39), four uniformly circumferentially arranged downward grooves (28) are opened on the outer side of the pin (29), the four downward posts (27) are slidably installed in the four downward grooves (28) respectively, and multiple slots (20) are opened at the top of the rotating ring (16), the pin (29) and the slots (20) are positioned correspondingly; the circle formed by the outer side of the pin (29) coincides with the circle formed by the outer side of the four downward posts (27).

6. A lightweight drive motor for an electric wheelchair according to claim 5, characterized in that: The one-way limiting component includes a fixed sleeve (30), which is fixedly sleeved on four downward columns (27). A fixed block (31) is fixedly installed on the side of the fixed sleeve (30). A deceleration block (32) is fixedly installed on the side of the fixed block (31) away from the fixed sleeve (30). A compression sleeve (18) is fixedly installed on the outer side of the deceleration column (7). A plurality of evenly arranged deceleration grooves (19) are opened on the top of the compression sleeve (18). The deceleration grooves (19) correspond to the positions of the deceleration blocks (32).

7. A lightweight drive motor for an electric wheelchair according to claim 1, characterized in that: The bottom of the motor housing (1) is fixedly installed with an mounting plate, the bottom end of the shaft (2) passes through the mounting plate, and the top of the mounting plate is provided with multiple mounting holes; the upper end cover (8) and the lower end cover are provided with bearing holes on their sides that are close to each other, and bearings are fixedly installed in the two bearing holes, and the shaft (2) is fixedly installed on the inner ring of the two bearings.

8. A lightweight drive motor for an electric wheelchair according to claim 3, characterized in that: Both ends of the extrusion column (33) are located outside the inclined hole (23), and the height of the inner wall of the inclined hole (23) near the sliding frame (11) is higher than the height of the inner wall of the inclined hole (23) away from the sliding frame (11). The deceleration column (7) has an annular groove, and the rotating ring (16) is rotatably installed in the annular groove.

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