Integrated motor type wheelchair car wheel

Abstract

The utility model relates to the field of integrated electric wheel body, concretely relates to a kind of integrated motor type wheelchair wheel, comprising: drive motor, the drive motor includes motor shell and rotates and is arranged in the output shaft in motor shell, and drive gear is installed on the output shaft;Wheel body, the wheel body rotation is installed on motor shell;Transmission ring, the inner side wall of transmission ring is equipped with internal tooth;Several rotation settings transmission gears, the transmission gear transmission is engaged between drive gear and internal tooth, and several transmission gears are around the center of output shaft and are distributed in central symmetry;Clutch device, clutch device is arranged between wheel body and transmission ring, and the clutch device is used to switch the connection and separation of wheel body and transmission ring. Since several transmission gears are around the center of output shaft and are distributed in central symmetry, the stability of transmission between output shaft and transmission ring can be improved, to improve the use performance.

Description

Technical Field

[0001] This utility model relates to the field of integrated electric wheel bodies, specifically to an integrated motor type wheelchair wheel. Background Technology

[0002] Chinese utility model patent application number 202323611386.3 discloses an electric wheelchair wheel that integrates the wheel body, drive motor, and electromagnetic brake into one unit. By sharing a single power switch between the drive motor and electromagnetic brake, it can achieve braking upon power failure and allows for switching between electric and manual operation. As an independent wheelchair accessory, it can be installed on existing manual wheelchairs via a positioning part, facilitating the conversion of existing manual wheelchairs into electric wheelchairs. It features convenient installation and wide applicability.

[0003] However, its drawback is that the transmission connection between the rotor output shaft and the transmission disc is achieved by a single-sided gear, which leads to poor rotational transmission stability. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an integrated motor-driven wheelchair wheel with the advantage of good stability.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] An integrated motor-driven wheelchair wheelchair wheel, comprising:

[0007] A drive motor, the drive motor including a motor housing and an output shaft rotatably disposed in the motor housing, and a drive gear being mounted on the output shaft;

[0008] A wheel body, which is rotatably mounted on a motor housing;

[0009] The transmission ring has internal teeth on its inner sidewall;

[0010] A plurality of rotatably arranged transmission gears are engaged between the drive gear and the internal gear, and the plurality of transmission gears are centrally symmetrically distributed about the center of the output shaft.

[0011] A clutch device is disposed between the wheel body and the transmission ring, and the clutch device is used to switch the connection and disengagement of the wheel body and the transmission ring.

[0012] Furthermore, in an integrated motor-driven wheelchair wheelchair according to this application, the transmission gear includes a first gear, a second gear, and a gear shaft. The first gear and the second gear are coaxially mounted on the gear shaft. The first gear meshes with a drive gear, and the second gear meshes with an internal gear.

[0013] Furthermore, in an integrated motor-type wheelchair wheelchair according to this application, the motor housing includes an inner shell and a mounting end cover. The inner shell is used to house the stator and coil of the motor housing, and the mounting end cover is connected to the axial outer end of the inner shell. The transmission gear is rotatably mounted between the inner shell and the mounting end cover axially. The mounting end cover is placed in the inner ring of the transmission ring.

[0014] Furthermore, in an integrated motor-type wheelchair wheel of this application, the mounting end cap is provided with a bearing mounting groove and a limiting tube concentric with the output shaft at the end away from the inner shell, and the limiting tube is in the center of the bearing mounting groove so that the groove cavity of the bearing mounting groove is annular.

[0015] The wheel body includes a motor mounting cover located in the center, the motor mounting cover is sleeved on the motor housing, the motor mounting cover is rotatably connected to the motor housing, the motor mounting cover includes a limiting cover located at the end of the mounting end cover away from the inner housing, the limiting cover has an integrally formed annular bearing mounting seat at the end near the mounting end cover, the limiting cover has a first oil seal groove at the end away from the mounting end cover, and the limiting tube passes through the inner hole of the bearing mounting seat;

[0016] It also includes a first bearing, the inner ring of which is mounted on a bearing mounting seat, and the outer ring of which is embedded in a bearing mounting groove.

[0017] It also includes a first oil seal, which is sleeved on the outer wall of the limiting tube and embedded in a first oil seal groove. As a preferred embodiment of this application, based on the above structure, the stability of the rotational connection between the mounting end cap and the limiting cap and the sealing performance of the rotational connection position can be taken into account.

[0018] Furthermore, this application includes an integrated motor-driven wheelchair wheel.

[0019] The motor housing also includes a sealing cover, which is annular and is sealed to one end of the inner housing near the mounting end cover. The inner edge of the sealing cover away from the inner housing is sealed to the outer edge of the transmission ring near the first gear through a second oil seal in annular shape.

[0020] The limiting cover has an annular groove, and the transmission ring is rotatably disposed within the groove. The clutch device is mounted on the limiting cover and is used to switch the connection and separation of the limiting cover and the transmission ring. An annular sealing groove is provided on the end face of the limiting cover near the motor housing. The end of the transmission ring away from the first gear is rotatably disposed within the annular sealing groove. An annular third oil seal is provided within the annular sealing groove. The third oil seal is used to seal the end of the limiting cover and the transmission ring away from the motor housing. As a preferred embodiment of this application, the sealing cover and the transmission ring together form a cylindrical sealing area on the end of the motor housing. The two ends of the cylindrical sealing area are sealed by the limiting cover and the inner shell, respectively. The transmission gear and the mounting end cover are disposed within the cylindrical sealing area to ensure the sealing of the lubricating medium of the rotating parts.

[0021] Furthermore, in an integrated motor-driven wheelchair wheelchair according to this application, a quick-release rod is coaxially inserted within the output shaft, and the quick-release rod passes through a limiting tube. A return spring is sleeved on the quick-release rod within the limiting tube, and an annular flange is provided within the limiting tube, located at the end of the return spring near the motor housing. A sealing ring is tightly fitted onto the quick-release rod, and the return spring tightly presses the sealing ring against the annular flange. As a preferred embodiment of this application, based on the above device, a seal can be achieved between the limiting tube and the quick-release rod.

[0022] Furthermore, in one integrated motor-driven wheelchair wheelchair wheelchair of this application, the clutch device includes:

[0023] Rotate the cap that is fitted onto the limit cover; the inner side of the cap is provided with a transmission guide surface.

[0024] Rotate the locking tongue installed on the limiting cover. The locking tongue is located on the outside of the groove cavity. One end of the locking tongue is provided with a locking head, and the other end is provided with a transmission protrusion.

[0025] The elastic element abuts against the end of the latch away from the lock head to press the transmission protrusion onto the transmission guide surface.

[0026] The limiting cover has an opening through which the transmission protrusion passes into the groove cavity; the outer side of the transmission ring has notches arranged axially to match the lock head.

[0027] Rotating the cover causes the transmission guide surface to drive the bolt to rotate, so that the lock head enters or leaves the notch to switch the engagement / disengagement state of the limit cover and the transmission ring.

[0028] Furthermore, in one integrated motor-type wheelchair wheel of this application, a guide block is installed on the inner wall of the swivel cover, and a transmission guide surface is disposed on the guide block.

[0029] Furthermore, in an integrated motor-driven wheelchair wheelchair according to this application, a limiting protrusion is installed on the inner side wall of the swivel cover, and an annular limiting groove is provided on the side wall of the limiting cover, with the limiting protrusion disposed within the annular limiting groove. This is a preferred embodiment of this application, enabling axial positioning of the swivel cover and the limiting cover.

[0030] Furthermore, in one integrated motor-driven wheelchair wheel of this application, the inner side of the swivel cover is provided with a rotation limiting protrusion, which is located at both ends of the latch corresponding to the rotation direction of the swivel cover. As a preferred embodiment of this application, when the swivel cover is rotated, the rotation limiting protrusion and the end of the latch abut against each other to limit the rotation angle of the swivel cover and prevent over-rotation.

[0031] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0032] This invention provides an integrated motor-driven wheelchair wheel. In electric mode, the clutch engages the wheel and transmission ring, driving the motor to rotate the output shaft. The wheel rotates via a drive gear, transmission gear, and transmission ring. In manual mode, the clutch disengages the wheel and transmission ring, allowing manual rotation of the wheel. Because the transmission gears are centrally symmetrically distributed around the center of the output shaft, the stability of the transmission between the output shaft and the transmission ring is improved, thus enhancing performance. Attached Figure Description

[0033] Figure 1 This is a cross-sectional view of an integrated motor-driven wheelchair wheel according to an embodiment of this application;

[0034] Figure 2 for Figure 1 A magnified view of a portion of area A in the center circle;

[0035] Figure 3 for Figure 2 A magnified view of a portion of area B in the center circle;

[0036] Figure 4 This is an exploded view of a component of an integrated motor-driven wheelchair wheelchair according to an embodiment of this application;

[0037] Figure 5 for Figure 4 An enlarged view of the drive motor in the image;

[0038] Figure 6 for Figure 5 Exploded view of the drive motor components in the diagram;

[0039] Figure 7 This is a schematic diagram of the screw cap structure in an embodiment of this application;

[0040] Figure 8 This is a schematic diagram of the structure of the limiting cover in the embodiments of this application;

[0041] Figure 9 This is a schematic diagram of the clutch device in the embodiments of this application.

[0042] In the diagram: 1-Drive motor; 11-Motor housing; 111-Inner housing; 112-Mounting end cover; 1121-Bearing mounting groove; 1122-Limiting tube; 11221-Annular flange; 113-Sealing cover; 12-Output shaft; 121-Drive gear;

[0043] 2-Wheel body; 21-Motor mounting cover; 211-Limit cover; 2110-Groove cavity; 2111-Bearing mounting seat; 2112-First oil seal groove; 2113-Annular sealing groove; 2114-Opening; 2115-Annular limit groove;

[0044] 3-Transmission ring; 31-Internal tooth; 32-Notch;

[0045] 4-Transmission gear; 41-First gear; 42-Second gear; 43-Gear shaft;

[0046] 51-Quick release lever; 52-Reset spring;

[0047] 61-First bearing;

[0048] 71-First oil seal; 72-Second oil seal; 73-Third oil seal; 74-Sealing ring;

[0049] 81-Screw cap; 811-Transmission guide surface; 812-Guide block; 813-Rotation limiting protrusion; 82-Lock tongue; 821-Lock head; 822-Transmission protrusion; 83-Elastic element; 84-Limiting protrusion. Detailed Implementation

[0050] Based on the electric wheelchair wheelchair disclosed in Chinese Utility Model Patent Application No. 202323611386.3, combined with Figures 1 to 6 As shown, this embodiment provides an integrated motor-driven wheelchair wheel, comprising:

[0051] A drive motor 1, the drive motor 1 includes a motor housing 11 and an output shaft 12 rotatably disposed in the motor housing 11, and a drive gear 121 is mounted on the output shaft 12;

[0052] Wheel 2, which is rotatably mounted on motor housing 11;

[0053] Transmission ring 3, the inner sidewall of which is provided with internal teeth 31;

[0054] A plurality of rotatably arranged transmission gears 4 are engaged between the drive gear 121 and the internal gear 31, and the plurality of transmission gears 4 are centrally symmetrically distributed around the center of the output shaft 12.

[0055] A clutch device is provided between the wheel body 2 and the transmission ring 3. The clutch device is used to switch the connection and separation of the wheel body 2 and the transmission ring 3.

[0056] Based on the above device, its usage is as follows: In electric mode, the clutch switches to connect wheel 2 and transmission ring 3, and the drive motor 1 drives the output shaft 12 to rotate. The rotation of wheel 2 is achieved through the drive gear 121, transmission gear 4, and transmission ring 3. In manual mode, the clutch switches to disengage wheel 2 and transmission ring 3, allowing wheel 2 to be manually rotated. Since several transmission gears 4 are centrally symmetrically distributed around the center of the output shaft 12, the stability of the transmission between the output shaft 12 and the transmission ring 3 can be improved, thereby enhancing performance. In this embodiment, a pair of transmission gears 4 are provided.

[0057] In this embodiment, combined with Figure 2 and Figure 6 As shown, the transmission gear 4 includes a first gear 41, a second gear 42 and a gear shaft 43. The first gear 41 and the second gear 42 are coaxially mounted on the gear shaft 43. The first gear 41 is meshed with the drive gear 121 and the second gear 42 is meshed with the internal gear 31.

[0058] Combination Figure 2 and Figure 3 In this embodiment, the motor housing 11 includes an inner housing 111 and a mounting end cover 112. The inner housing 111 is used to house the stator and coil of the motor housing 11. The mounting end cover 112 is connected to the outer axial end of the inner housing 111. The transmission gear 4 is rotatably mounted between the inner housing 111 and the mounting end cover 112 in the axial direction. The mounting end cover 112 is placed in the inner ring of the transmission ring 3.

[0059] In this embodiment, bearings are respectively embedded in the inner shell 111 and the mounting end cover 112, and the two ends of the gear shaft 43 are rotatably mounted in the bearings on the inner shell 111 and the mounting end cover 112.

[0060] In this embodiment, the end of the mounting end cover 112 away from the inner shell 111 is provided with a bearing mounting groove 1121 and a limiting tube 1122 concentric with the output shaft 12. The limiting tube 1122 is in the center of the bearing mounting groove 1121 so that the cavity of the bearing mounting groove 1121 is annular.

[0061] The wheel body 2 includes a motor mounting cover 21 located in the center. The motor mounting cover 21 is sleeved on the motor housing 11 and is rotatably connected to the motor housing 11. The motor mounting cover 21 includes a limiting cover 211 located at the end of the mounting end cover 112 away from the inner housing 111. The end of the limiting cover 211 near the mounting end cover 112 is integrally provided with an annular bearing mounting seat 2111. The end of the limiting cover 211 away from the mounting end cover 112 is provided with a first oil seal groove 2112. The limiting tube 1122 passes through the inner hole of the bearing mounting seat 2111.

[0062] It also includes a first bearing 61, the inner ring of which is mounted on the bearing mounting seat 2111, and the outer ring of which is embedded in the bearing mounting groove 1121; it also includes a first oil seal 71, which is sleeved on the outer wall of the limiting tube 1122 and embedded in the first oil seal groove 2112.

[0063] Based on the above structure, the stability of the rotational connection between the mounting end cover 112 and the limiting cover 211 and the sealing of the rotational connection position can be taken into account.

[0064] Combination Figure 2, Figure 5 and Figure 6 As shown, in this embodiment, the motor housing 11 further includes a sealing cover 113. The sealing cover 113 is annular and is sealed to one end of the inner housing 111 near the mounting end cover 112. The inner edge of the sealing cover 113 away from the inner housing 111 is sealed to the outer edge of the transmission ring 3 near the first gear 41 through a second oil seal 72 in an annular shape.

[0065] The limiting cover 211 has an annular groove 2110 inside, and the transmission ring 3 is rotatably disposed in the groove 2110. The clutch device is installed on the limiting cover 211 and is used to switch the connection and separation of the limiting cover 211 and the transmission ring 3. The end face of the limiting cover 211 near the motor housing 11 has an annular sealing groove 2113. The end of the transmission ring 3 away from the first gear 41 is rotatably disposed in the annular sealing groove 2113. The annular sealing groove 2113 has an annular third oil seal 73. The third oil seal 73 is used to seal the limiting cover 211 and the end of the transmission ring 3 away from the motor housing 11.

[0066] Therefore, the sealing cover 113 and the transmission ring 3 together form a cylindrical sealing area on the end of the motor housing 11. The two ends of the cylindrical sealing area are sealed by the limiting cover 211 and the inner shell 111, respectively. The transmission gear 4 and the mounting end cover 112 are set in the cylindrical sealing area to ensure the sealing of the lubricating medium of the rotating parts.

[0067] Combination Figure 3 As shown, in this embodiment, a quick-release rod 51 is coaxially inserted inside the output shaft 12, and the quick-release rod 51 is inserted into the limiting tube 1122; a reset spring 52 is sleeved on the quick-release rod 51 inside the limiting tube 1122, and an annular flange 11221 is provided inside the limiting tube 1122. The annular flange 11221 is located at one end of the reset spring 52 near the motor housing 11, and a sealing ring 74 is tightly sleeved on the quick-release rod 51. The reset spring 52 tightly presses the sealing ring 74 onto the annular flange 11221.

[0068] Based on the above device, a seal can be achieved between the limiting tube 1122 and the quick-release rod 51.

[0069] Combination Figure 2 , Figures 7 to 9 As shown, in this embodiment, the clutch device includes:

[0070] Rotary cap 81 is sleeved on limit cover 211, and a transmission guide surface 811 is provided on the inner side of cap 81;

[0071] Rotate the locking tongue 82 mounted on the limiting cover 211. The locking tongue 82 is located outside the groove cavity 2110. One end of the locking tongue 82 is provided with a lock head 821, and the other end is provided with a transmission protrusion 822.

[0072] The elastic element 83 abuts against the end of the latch 82 away from the lock head 821 to press the transmission protrusion 822 onto the transmission guide surface 811.

[0073] The limiting cover 211 has an opening 2114, through which the transmission protrusion 822 passes and enters the groove 2110; the outer side of the transmission ring 3 has notches 32 arranged axially to match the lock head 821.

[0074] Rotating the cover 81 causes the transmission guide surface 811 to drive the latch 82 to rotate, so that the lock head 821 enters or leaves the notch 32 to switch the engagement / disengagement state of the limit cover 211 and the transmission ring 3.

[0075] In this embodiment, a guide block 812 is installed on the inner wall of the screw cap 81, and a transmission guide surface 811 is disposed on the guide block 812.

[0076] In this embodiment, a limiting protrusion 84 is installed on the inner side wall of the screw cap 81, and an annular limiting groove 2115 is provided on the side wall of the limiting cap 211, with the limiting protrusion 84 disposed in the annular limiting groove 2115.

[0077] This achieves axial positioning of the screw cap 81 and the limiting cap 211. Specifically, the opening 2114 is provided on the annular limiting groove 2115, and the locking tongue 82 is rotatably installed in the annular limiting groove 2115.

[0078] In this embodiment, the inner side of the cap 81 is provided with a rotation limiting protrusion 813, which is located at both ends of the latch 82 corresponding to the rotation direction of the cap 81.

[0079] When rotating the cap 81, the rotation angle of the cap 81 is limited by the contact between the rotating limiting protrusion 813 and the end of the locking tongue 82, so as to prevent over-rotation.

[0080] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. An integrated motor-driven wheelchair wheel, characterized in that: include: The drive motor (1) includes a motor housing (11) and an output shaft (12) rotatably disposed in the motor housing (11), and a drive gear (121) is mounted on the output shaft (12). Wheel body (2), which is rotatably mounted on motor housing (11); Transmission ring (3), the inner sidewall of which is provided with internal teeth (31); A plurality of rotating transmission gears (4) are connected to drive gears (121) and internal gears (31). The plurality of transmission gears (4) are centrally symmetrically distributed around the center of output shaft (12). A clutch device is provided between the wheel body (2) and the transmission ring (3), and the clutch device is used to switch the connection and separation of the wheel body (2) and the transmission ring (3); The transmission gear (4) includes a first gear (41), a second gear (42) and a gear shaft (43). The first gear (41) and the second gear (42) are coaxially mounted on the gear shaft (43). The first gear (41) meshes with the drive gear (121), and the second gear (42) meshes with the internal gear (31). The motor housing (11) includes an inner shell (111) and a mounting end cover (112). The inner shell (111) is used to house the stator and coil of the motor housing (11). The mounting end cover (112) is connected to the outer axial end of the inner shell (111). The transmission gear (4) is rotatably mounted between the inner shell (111) and the mounting end cover (112) in the axial direction. The mounting end cover (112) is placed in the inner ring of the transmission ring (3). The mounting end cap (112) is provided with a bearing mounting groove (1121) and a limiting tube (1122) concentric with the output shaft (12) at the end away from the inner shell (111). The limiting tube (1122) is annular in the center of the bearing mounting groove (1121) and so that the cavity of the bearing mounting groove (1121) is annular. The wheel body (2) includes a motor mounting cover (21) located in the center. The motor mounting cover (21) is sleeved on the motor housing (11). The motor mounting cover (21) is rotatably connected to the motor housing (11). The motor mounting cover (21) includes a limiting cover (211) located at the end of the mounting end cover (112) away from the inner shell (111). The limiting cover (211) has an integrally formed annular bearing mounting seat (2111) at the end near the mounting end cover (112). The limiting cover (211) has a first oil seal groove (2112) at the end away from the mounting end cover (112). The limiting tube (1122) passes through the inner hole of the bearing mounting seat (2111). It also includes a first bearing (61), the inner ring of the first bearing (61) is installed on the bearing mounting seat (2111), and the outer ring of the first bearing (61) is embedded in the bearing mounting groove (1121); It also includes a first oil seal (71), which is sleeved on the outer wall of the limiting tube (1122) and embedded in the first oil seal groove (2112); The clutch device includes: Rotate the cap (81) which is sleeved on the limit cover (211), and the inner side of the cap (81) is provided with a transmission guide surface (811). Rotate the locking tongue (82) mounted on the limiting cover (211). The locking tongue (82) is located outside the groove cavity (2110). One end of the locking tongue (82) is provided with a lock head (821), and the other end is provided with a transmission protrusion (822). The elastic element (83) abuts against the end of the latch (82) away from the lock head (821) to press the transmission protrusion (822) onto the transmission guide surface (811); The limiting cover (211) has an opening (2114), through which the transmission protrusion (822) passes and enters the groove (2110); the outer side of the transmission ring (3) has a notch (32) that is adapted to the lock head (821). Rotating the cover (81) causes the transmission guide surface (811) to drive the latch (82) to rotate, so that the lock head (821) enters or leaves the notch (32) to switch the engagement / disengagement state of the limit cover (211) and the transmission ring (3).

2. The integrated motor-driven wheelchair wheelchair wheel according to claim 1, characterized in that: The motor housing (11) also includes a sealing cover (113), which is annular and is sealed to one end of the inner housing (111) near the mounting end cover (112). The inner edge of the sealing cover (113) away from the inner housing (111) is sealed to the outer edge of the transmission ring (3) near the first gear (41) by a second oil seal (72) in annular shape. The limiting cover (211) has an annular groove (2110) inside, and the transmission ring (3) is rotatably disposed in the groove (2110). The clutch device is installed on the limiting cover (211) and is used to switch the connection and separation of the limiting cover (211) and the transmission ring (3). The end face of the limiting cover (211) near the motor housing (11) is provided with an annular sealing groove (2113). The end of the transmission ring (3) away from the first gear (41) is rotatably disposed in the annular sealing groove (2113). The annular sealing groove (2113) is provided with an annular third oil seal (73). The third oil seal (73) is used to seal the limiting cover (211) and the end of the transmission ring (3) away from the motor housing (11).

3. The integrated motor-driven wheelchair wheelchair wheel according to claim 2, characterized in that: A quick-release rod (51) is coaxially inserted inside the output shaft (12), and the quick-release rod (51) is inserted into the limiting tube (1122). A reset spring (52) is sleeved on the quick-release rod (51) inside the limiting tube (1122). An annular flange (11221) is provided inside the limiting tube (1122). The annular flange (11221) is located at one end of the reset spring (52) near the motor housing (11). A sealing ring (74) is tightly sleeved on the quick-release rod (51). The reset spring (52) tightly presses the sealing ring (74) onto the annular flange (11221).

4. The integrated motor-driven wheelchair wheelchair wheel according to claim 1, characterized in that: A guide block (812) is installed on the inner wall of the cap (81), and a transmission guide surface (811) is provided on the guide block (812).

5. The integrated motor-driven wheelchair wheelchair wheel according to claim 1, characterized in that: The inner wall of the screw cap (81) is equipped with a limiting protrusion (84), and the side wall of the limiting cap (211) is provided with an annular limiting groove (2115), and the limiting protrusion (84) is set in the annular limiting groove (2115).

6. The integrated motor-driven wheelchair wheelchair wheel according to claim 1, characterized in that: The inner side of the cap (81) is provided with a rotation limiting protrusion (813), which is located at both ends of the latch (82) corresponding to the rotation direction of the cap (81).

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