Controller deflection support for electric wheelchair

Abstract

The controller deflection support for the electric wheelchair comprises a connecting box and a gear set arranged in the connecting box, the gear set comprises a first gear, a second gear and a third gear, the diameters and the tooth numbers of the first gear, the second gear and the third gear are equal, and the first gear, the second gear and the third gear are meshed in sequence. The upper end part of the connecting box rotatably penetrates through the connecting box and is fixedly connected with the end part of an armrest of the electric wheelchair; a second support shaft penetrates through the center of the second gear, and the end part of the second support shaft is inserted into an insertion hole in the connecting box, so that the second support shaft is rotationally connected with the second gear and / or the insertion hole; a third supporting shaft fixedly penetrates through the center of the third gear, so that the upper end part of the third supporting shaft rotatably penetrates through the connecting box to form a connecting end for mounting an electric wheelchair controller; when the connecting box rotates relative to the end part of the armrest, the second gear can rotate around the first gear and drive the third gear to rotate reversely, so that the controller and the connecting box are consistent in rotating angle and opposite in rotating direction, deflection is realized, the safety is good, and the experience feeling and the advanced feeling are good.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchairs, and particularly relates to a controller deflection bracket for an electric wheelchair. Background Art

[0002] An electric wheelchair is the main means of transportation for the disabled with inconvenient legs and feet to go out. For convenient operation, most of the existing electric wheelchairs will install a controller at the end of the armrest. For example, Chinese patents CN206700327U and CN206603874U disclose such electric wheelchairs. However, the position of the controller of such wheelchairs cannot be adjusted after installation, and the usability is poor. To solve this problem, mechanisms for adjusting the position of the controller have emerged on the market. For example, Chinese patents CN2838585Y and CN211213942U disclose such mechanisms. However, the former can only realize the up-and-down and front-and-back translation of the controller and cannot deflect. Although the latter can deflect the controller, its exposed four-link mechanism is easy to clamp the user's sleeves, elbows and other parts, and the safety is poor. There is no damping during the deflection process, and the experience and high-class feeling are poor. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a controller deflection bracket for an electric wheelchair with better safety, better use experience and high-class feeling.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is that the controller deflection bracket for an electric wheelchair includes:

[0005] A connection box;

[0006] A gear set, the gear set is arranged in the connection box, the gear set includes a first gear, a second gear and a third gear with equal diameters and numbers of teeth, and the first gear, the second gear and the third gear are meshed in sequence along the extension direction of the connection box;

[0007] The center of the first gear is fixedly penetrated with a first support shaft, and the upper end of the first support shaft rotatably penetrates through the connection box and is fixedly connected with the end of the armrest of the electric wheelchair;

[0008] The center of the second gear is penetrated with a second support shaft, the end of the second support shaft is inserted into a jack in the connection box, and the second support shaft is rotatably connected with the second gear and / or rotatably connected with the jack;

[0009] The center of the third gear is fixedly penetrated with a third support shaft, the upper end of the third support shaft rotatably penetrates through the connection box to form a connection end, and the controller of the electric wheelchair is installed on the connection end;

[0010] When the connection box rotates relative to the end of the armrest, the first gear remains fixed relative to the end of the armrest. The second gear rotates around the first gear within the connection box and drives the third gear to reverse within the connection box, causing the controller to have the same rotation angle as the connection box but in the opposite rotation direction, thus achieving deflection.

[0011] Preferably, the controller deflection bracket for the electric wheelchair further includes a locking assembly. The locking assembly includes a locking plate and a locking pin. The locking plate is disposed within the connection box and fixedly connected to the bottom wall of the first gear. A locking hole is formed in the locking plate and penetrates the locking plate in the up and down direction. The locking pin is inserted into the bottom wall of the connection box in a vertically movable manner. The distance between the axis of the locking pin and the axis of the first gear is equal to the distance between the axis of the locking hole and the axis of the first gear. When the locking pin moves upward and inserts into the locking hole, the connection box is relatively fixed to the locking plate and the first gear, so that the relative position between the connection box and the end of the armrest is locked.

[0012] Further preferably, a rectangular groove is provided in the center of the bottom wall of the first gear and recesses upward. The groove wall of the rectangular groove is located outside the first support shaft. A frustum is provided on the top surface of the locking plate and is matched with the rectangular groove. The frustum is embedded in the rectangular groove, so that the relative position between the locking plate and the first gear in the circumferential direction is fixed.

[0013] Further preferably, the locking plate is a circular plate, and the diameter of the locking plate is less than or equal to the diameter of the first gear. The locking plate is locked to the bottom wall of the first gear by a locking bolt, so that the relative position between the locking plate and the first gear in the up and down direction is fixed.

[0014] Further preferably, the lower end of the first support shaft extends into the locking plate, and the upper end of the locking bolt extends into the bottom center hole of the first support shaft and is threadedly connected thereto.

[0015] Further preferably, the controller deflection bracket for the electric wheelchair further includes an unlocking assembly. The unlocking assembly includes a mounting seat and an unlocking button. The mounting seat is disposed on the bottom wall of the connection box and extends downward. The unlocking button is rotatably connected to the mounting seat by a first rotating shaft. The unlocking button is also rotatably connected to the lower end of the locking pin by a second rotating shaft. The second rotating shaft is parallel to the first rotating shaft. When the unlocking button rotates around the first rotating shaft relative to the mounting seat, it can drive the locking pin to move up and down through the second rotating shaft, so that the upper end of the locking pin is inserted into or disengaged from the locking hole.

[0016] Further preferably, a spring groove is formed in the mounting seat, the notch of the spring groove is aligned with the cross baffle on the unlocking button, a spring is arranged in the spring groove, and two end portions of the spring respectively abut against the bottom wall of the spring groove and the cross baffle, and the spring has a tendency to drive the unlocking button to rotate and move the locking pin upward.

[0017] Further preferably, a pressing groove is formed in the lower surface of the bottom plate of the unlocking button, the cross section of the pressing groove is circular, the diameter of the pressing groove gradually decreases upward, and anti-slip grooves extending in the front-back or left-right direction are arranged on the inner wall of the pressing groove.

[0018] Preferably, the connection box includes a lower shell with a closed bottom and an upper cover connected to the lower shell. An accommodating cavity for accommodating the rotation of the first gear, the second gear and the third gear is arranged in the lower shell. The accommodating cavity extends upward through the upper end surface of the lower shell, and the upper cover covers the opening of the accommodating cavity.

[0019] Further preferably, the third support shaft includes a shaft sleeve fixedly penetrating through the center of the third gear and a bolt penetrating through the shaft sleeve and threadedly connected to the support plate of the controller. When the bolt is tightened, the upper and lower end portions of the shaft sleeve respectively abut against the support plate and the bolt head portion of the bolt, so that the support plate and the third gear keep synchronous rotation.

[0020] Due to the application of the above technical solutions, the utility model has the following advantages compared with the prior art:

[0021] The controller deflection bracket for an electric wheelchair provided by the utility model includes a connection box and a gear set arranged in the connection box. The gear set includes first, second and third gears with equal diameters and numbers of teeth and meshing in sequence along the extension direction of the connection box. By fixedly penetrating a first support shaft through the center of the first gear, the upper end portion thereof rotatably penetrates through the connection box and is fixedly connected to the end portion of the armrest of the electric wheelchair; a second support shaft is penetrated through the center of the second gear, and the end portion thereof is inserted into a jack arranged in the connection box, so that the second gear is rotationally connected to the jack and / or rotationally connected to the second gear; a third support shaft is fixedly penetrated through the center of the third gear, and the upper end portion thereof rotatably penetrates through the connection box to form a connection end for installing the controller of the electric wheelchair; when the connection box rotates relative to the armrest end portion, the second gear can rotate around the first gear and drive the third gear to reverse, so that the rotation angles of the controller and the connection box are the same and the rotation directions are opposite, realizing deflection, and the orientation of the controller remains unchanged before and after deflection. The controller deflection bracket for an electric wheelchair can not only realize the deflection of the controller, but also avoid the exposure of the gear set, with better safety, and can also utilize the mutual meshing of the first gear, the second gear and the third gear to provide a certain damping force to improve the experience during use. At the same time, the controller deflection bracket for an electric wheelchair has a compact structure, a small and delicate appearance, and a more advanced sense. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a left view schematic diagram of a preferred embodiment of the present utility model.

[0023] Figure 2 is Figure 1 a sectional view schematic diagram after removing the controller in

[0024] Figure 3 is Figure 2 a partial enlarged schematic diagram at the unlocking component in , showing the state where the locking pin disengages from the locking hole.

[0025] Figure 4 is Figure 2 an exploded assembly schematic diagram of

[0026] Figure 5 is Figure 1 a top view schematic diagram of

[0027] Figure 6 is Figure 5 a schematic diagram when the connection box in rotates 45°.

[0028] Wherein: 1. Controller; 2. Support plate; 10. Connection box; 11. Jack; 12. Lower shell; 121. Accommodation cavity; 122. Countersunk hole; 13. Upper cover; 21. First gear; 211. Rectangular groove; 22. Second gear; 23. Third gear; 31. First support shaft; 311. Bottom center hole; 32. Second support shaft; 33. Third support shaft; 331. Connection end; 332. Bush; 333. Bolt; 41. Locking plate; 411. Locking hole; 412. Frustum; 413. Locking bolt; 42. Locking pin; 51. Mounting seat; 511. Spring groove; 512. Spring; 52. Unlock button; 521. Cross baffle; 522. Bottom plate; 523. Pressing groove; 524. Anti-slip groove; 61. First rotating shaft; 62. Second rotating shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] As Figures 1 to 6As shown in the figure, the controller deflection bracket for an electric wheelchair provided by the present utility model includes a connection box 10 and a gear set disposed within the connection box 10. The gear set includes a first gear 21, a second gear 22, and a third gear 23 that have equal diameters and equal numbers of teeth. The first gear 21, the second gear 22, and the third gear 23 are sequentially meshed along the extension direction of the connection box 10. A first support shaft 31 is fixedly inserted through the center of the first gear 21. The upper end portion of the first support shaft 31 rotatably penetrates the connection box 10 and is fixedly connected to the end portion of the armrest of the electric wheelchair (not shown in the figure). A second support shaft 32 is inserted through the center of the second gear 22. The lower end portion of the second support shaft 32 is inserted into a jack 11 within the connection box 10. The second support shaft 32 is rotatably connected to the second gear 22 and is threadedly connected to the jack 11 to achieve locking. A third support shaft 33 is fixedly inserted through the center of the third gear 23. The upper end portion of the third support shaft 33 rotatably penetrates the connection box 10 to form a connection end 331. The controller 1 of the electric wheelchair is mounted on the connection end 331. The aforementioned rotatable penetration means that the penetrating member and the penetrated member can rotate relative to each other.

[0030] The advantages of such a setting are as follows: When the connection box rotates relative to the end portion of the armrest, the first gear remains fixed relative to the end portion of the armrest. The second gear rotates within the connection box around the first gear and drives the third gear to reverse synchronously within the connection box, so that the rotation angle of the controller is the same as that of the connection box and the rotation directions are opposite, achieving deflection. Moreover, the orientation of the controller remains unchanged before and after deflection. It can not only achieve the deflection of the controller, but also avoid the exposure of the gear set to improve safety. Additionally, it can utilize the mutual meshing of the first gear, the second gear, and the third gear to provide a certain damping force, enhancing the experience during use. At the same time, it makes the controller deflection bracket for the electric wheelchair have a compact structure, a small and delicate appearance, and a more premium feeling.

[0031] To achieve locking, the controller deflection bracket for the electric wheelchair further includes a locking assembly. The locking assembly includes a locking plate 41 and a locking pin 42. The locking plate 41 is disposed in the connection box 10 and fixedly connected to the bottom wall of the first gear 21. A locking hole 411 penetrating the locking plate 41 in the vertical direction is formed on the locking plate 41. The locking pin 42 is inserted into the bottom wall of the connection box 10 in a vertically movable manner. The distance between the axis of the locking pin 42 and the axis of the first gear 21 is equal to the distance between the axis of the locking hole 411 and the axis of the first gear 21. The diameter of the locking pin 42 is 1 to 3 mm smaller than the inner diameter of the locking hole 411. During the process that the locking plate 41 rotates one circle following the first gear 21, the locking hole 411 has a state of being aligned with the locking pin 42 in the vertical direction once. In this state, when the locking pin 42 moves upward and inserts into the locking hole 411, the connection box 10 can be relatively fixed to the locking plate 41 and the first gear 21, so that the relative position between the connection box 10 and the armrest end is locked. For the convenience of inserting the locking pin 42, further, the locking hole 411 extends outward and penetrates the outer circumferential surface of the locking plate 41.

[0032] To achieve the relative fixation between the locking plate 41 and the first gear 21, in this embodiment, a rectangular groove 211 sunken upward is provided at the center of the bottom wall of the first gear 21. The groove wall of the rectangular groove 211 is located outside the first support shaft 31. A frustum 412 matching the rectangular groove 211 is provided on the top surface of the locking plate 41. The frustum 412 is embedded in the rectangular groove 211 to keep the relative position between the locking plate 41 and the first gear 21 fixed in the circumferential direction. At the same time, the locking plate 41 is a circular plate, and the diameter of the locking plate 41 is equal to the diameter of the first gear 21. The locking plate 41 is coaxially locked to the bottom wall of the first gear 21 through a locking bolt 413, so that the relative position between the locking plate 41 and the first gear 21 is fixed in the vertical direction.

[0033] For the convenience of assembly, further, the lower end of the first support shaft 31 extends into the locking plate 41, and the upper end of the locking bolt 413 extends into the bottom center hole 311 of the first support shaft 31 and is threadedly connected thereto.

[0034] To achieve unlocking, the controller deflection bracket for the electric wheelchair further includes an unlocking assembly. The unlocking assembly includes a mounting seat 51 and an unlocking button 52. The mounting seat 51 is disposed on the bottom wall of the connection box 10 and extends downward. The unlocking button 52 is rotatably connected to the mounting seat 51 through a first rotating shaft 61. The unlocking button 52 is also rotatably connected to the lower end of the locking pin 42 through a second rotating shaft 62. The second rotating shaft 62 is parallel to the first rotating shaft 61. When the unlocking button 52 rotates relative to the mounting seat 51 around the first rotating shaft 61, the locking pin 42 can be driven to move up and down through the second rotating shaft 62, so that the upper end of the locking pin 42 is inserted into or disengaged from the locking hole 411.

[0035] To achieve automatic locking, in this embodiment, a spring groove 511 is formed on the mounting base 51. The notch of the spring groove 511 is aligned with the cross baffle 521 on the unlocking button 52. A spring 512 is provided in the spring groove 511. The two end portions of the spring 512 respectively abut against the bottom wall of the spring groove 511 and the cross baffle 521. The spring 512 has a tendency to drive the unlocking button 52 to rotate and move the locking pin 42 upward. When the locking hole 411 is in a state of being aligned with the locking pin 42 in the vertical direction, the locking pin 42 can automatically move upward under the action of the spring 512 and insert into the locking hole 411 to achieve locking.

[0036] To facilitate pressing, in this embodiment, a pressing groove 523 is provided on the lower surface of the bottom plate 522 of the unlocking button 52. The cross section of the pressing groove 523 is circular, the diameter of the pressing groove 523 gradually decreases upward, and anti-slip grooves 524 extending in the front-rear direction are provided on the inner wall of the pressing groove 523.

[0037] To facilitate assembly, in this embodiment, the connection box 10 includes a lower shell 12 with a closed bottom and an upper cover 13 connected to the lower shell 12. An accommodation cavity 121 for accommodating the rotation of the first gear 21, the second gear 22, and the third gear 23 is provided in the lower shell 12. The accommodation cavity 121 extends upward through the upper end surface of the lower shell 12, and the upper cover 13 covers the opening of the accommodation cavity 121.

[0038] Furthermore, the third support shaft 33 includes a bushing 332 fixedly inserted through the center of the third gear 23 and a bolt 333 inserted through the bushing 332 and threadedly connected to the support plate 2 of the controller 1. When the bolt 333 is tightened, the upper and lower end portions of the bushing 332 respectively abut against the support plate 2 and the screw head portion of the bolt 333, so that the support plate 2 and the third gear 23 rotate synchronously.

[0039] To facilitate connection, further, the bolt 333 penetrates through the bottom wall of the lower shell 12. At the same time, a counterbore 122 for avoiding the screw head portion of the bolt 333 is formed on the bottom wall of the lower shell 12.

[0040] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A controller deflection bracket for an electric wheelchair, comprising: Connection box; A gear set, the gear set is arranged in the connection box, the gear set includes a first gear, a second gear and a third gear with equal diameters and numbers of teeth, the first gear, the second gear and the third gear are meshed in sequence along the extension direction of the connection box; Features: A first support shaft is fixedly provided through the center of the first gear, and an upper end portion of the first support shaft rotatably passes through the connection box and is fixedly connected to an end portion of the handrail of the electric wheelchair; A second support shaft is passed through the center of the second gear, an end of the second support shaft is inserted into a socket in the connection box, and the second support shaft is rotationally connected to the second gear and / or rotationally connected to the socket; A third support shaft is fixedly provided at the center of the third gear, and an upper end portion of the third support shaft rotatably passes through the connection box to form a connection end, and a controller of the electric wheelchair is mounted on the connection end.

2. The controller deflection bracket for an electric wheelchair according to claim 1, characterized in that: The controller deflection bracket for the electric wheelchair also includes a locking assembly, which includes a locking plate and a locking pin. The locking plate is arranged in the connecting box and fixedly connected to the bottom wall of the first gear. The locking plate is provided with a locking hole that penetrates the locking plate in the up and down directions. The locking pin is inserted into the bottom wall of the connecting box so as to be movable up and down. The distance between the axis line of the locking pin and the axis line of the first gear is equal to the distance between the axis line of the locking hole and the axis line of the first gear. When the locking pin moves upward and is inserted into the locking hole, the connecting box, the locking plate and the first gear are relatively fixed, so that the relative position of the connecting box and the end of the armrest remains locked.

3. The controller deflection bracket for an electric wheelchair according to claim 2, characterized in that: A rectangular groove recessed upward is provided at the center of the bottom wall of the first gear, the groove wall of the rectangular groove is located on the outside of the first support shaft, and a prism matching the rectangular groove is provided on the top surface of the locking plate. The prism is embedded in the rectangular groove to keep the relative position of the locking plate and the first gear in the circumferential direction fixed.

4. The controller deflection bracket for an electric wheelchair according to claim 2, characterized in that: The locking plate is a circular plate, the diameter of which is less than or equal to the diameter of the first gear. The locking plate is locked on the bottom wall of the first gear by a locking bolt, so that the relative position of the locking plate and the first gear in the up and down directions remains fixed.

5. The controller deflection bracket for an electric wheelchair according to claim 4, characterized in that: The lower end of the first support shaft extends into the locking plate, and the upper end of the locking bolt extends into the bottom center hole of the first support shaft and is threadedly connected thereto.

6. The controller deflection bracket for an electric wheelchair according to claim 2, characterized in that: The controller deflection bracket for the electric wheelchair also includes an unlocking component, which includes a mounting seat and an unlocking button. The mounting seat is arranged on the bottom wall of the connecting box and extends downward. The unlocking button is rotatably connected to the mounting seat via a first rotating shaft. The unlocking button is also rotatably connected to the lower end of the locking pin via a second rotating shaft. The second rotating shaft is parallel to the first rotating shaft. When the unlocking button rotates relative to the mounting seat around the first rotating shaft, the locking pin can be driven to move up and down via the second rotating shaft, so that the upper end of the locking pin is inserted into or disengaged from the locking hole.

7. The controller deflection bracket for an electric wheelchair according to claim 6, characterized in that: A spring groove is provided on the mounting seat, the notch of the spring groove is aligned with the transverse baffle on the unlocking button, a spring is provided in the spring groove, the two ends of the spring respectively press against the bottom wall of the spring groove and the transverse baffle, and the spring has a tendency to drive the unlocking button to rotate so that the locking pin moves upward.

8. The controller deflection bracket for an electric wheelchair according to claim 6, characterized in that: A pressing groove is provided on the lower surface of the bottom plate of the unlocking button. The cross section of the pressing groove is circular. The diameter of the pressing groove gradually decreases upward. The inner wall of the pressing groove is provided with an anti-slip groove extending in the front-to-back or left-to-right direction.

9. The controller deflection bracket for an electric wheelchair according to claim 1, characterized in that: The connection box includes a lower shell with a closed bottom and an upper cover connected to the lower shell. The lower shell is provided with an accommodating cavity for accommodating the rotation of the first gear, the second gear and the third gear. The accommodating cavity extends upward through the upper end surface of the lower shell, and the upper cover covers the opening of the accommodating cavity.

10. The electric wheelchair controller deflection bracket according to any one of claims 1 to 9, characterized in that: The third support shaft includes a sleeve fixedly installed in the center of the third gear and a bolt installed on the sleeve and threadedly connected to the support plate of the controller. When the bolt is tightened, the upper and lower ends of the sleeve respectively press against the support plate and the screw head of the bolt, so that the support plate and the third gear rotate synchronously.

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