Unlocking device for a wheelchair motor

Abstract

The utility model discloses an unlocking device of wheelchair motor belongs to the wheel hub motor field, including guide table and rotary cover, the upper end of guide table is disc boss, the center of disc boss is equipped with the second through -hole, the lower extreme of rotary cover is equipped with the recess of placing disc boss, is provided with the first through -hole of intercommunication with recess on rotary cover, first through -hole and second through -hole correspond, and the bolt is locked on the unlocking bolt after passing first through -hole, second through -hole, makes unlocking device install on the unlocking bolt, rotary cover can rotate horizontally relative to guide table and adjust the height interval between rotary cover and guide table, and drive unlocking bolt axial movement. The device can realize the conversion of wheel hub motor normal mode and unlocking mode quickly with the help of rotary cover and guide table, and the use convenience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of hub motors and relates to an unlocking device for a wheelchair motor. Background Technology

[0002] In the field of electric wheelchairs, the performance of the hub motor directly affects the user experience. CN108270318B discloses an electric wheelchair hub motor (hereinafter referred to as a wheelchair motor) with a built-in electromagnetic braking device, which improves the safety and reliability of the wheelchair to a certain extent. Under normal operating conditions, the built-in electromagnetic braking device achieves braking through the electromagnetic attraction generated by the braking coil. When the electromagnetic attraction of the braking coil fails (damaged or uncontrollable), in order to reduce the pushing resistance of the electric wheelchair, the unlocking bolt is screwed outwards, causing the pressure sleeve to move outwards against the elastic force of the first spring by a certain gap. This reduces the friction between the two friction discs, thereby reducing the rotational resistance of the output shaft.

[0003] However, the unlocking bolts require special tools such as wrenches to operate, which makes the adjustment process cumbersome. In actual use, users find it difficult to complete the unlocking operation quickly and conveniently, affecting the emergency handling efficiency of electric wheelchairs in emergency situations. Utility Model Content

[0004] The purpose of this utility model is to provide an unlocking device for a wheelchair motor, which can be assembled with an unlocking bolt to quickly and conveniently unlock the bolt and enable rapid switching between the normal mode and the unlocking mode of the hub motor.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An unlocking device for a wheelchair motor, comprising:

[0007] A guide platform, the upper end of which is a disc boss, and a second through hole is provided at the center of the disc boss;

[0008] A rotating cover, wherein the lower end of the rotating cover is provided with an inner groove for placing the disc boss, and the rotating cover is provided with a first through hole communicating with the inner groove;

[0009] The first through hole and the second through hole are vertically aligned. After the bolt passes through the first through hole and the second through hole, it is locked onto the unlocking bolt, so that the unlocking device is installed on the unlocking bolt.

[0010] The rotating cover can rotate horizontally relative to the guide table and adjust the height distance between the rotating cover and the guide table, thereby driving the unlocking bolt to move axially.

[0011] As a further improvement of one embodiment of this utility model, the height adjustment between the guide platform and the rotating cover is achieved through a threaded connection or a ramp step.

[0012] As a further improvement of one embodiment of the present utility model, the inner groove is a circular structure with an internal thread structure on its inner wall; the outer end face of the disc boss is provided with an external thread structure, and the external thread structure is adapted to the internal thread structure of the inner groove, so that the disc boss is threadedly connected in the inner groove.

[0013] As a further improvement of one embodiment of the present invention, a plurality of protruding second guide members are uniformly arranged circumferentially around the inner groove of the first through hole, and a plurality of protruding first guide members are uniformly arranged circumferentially around the disc boss of the second through hole. Rotating the rotating cover can make the first guide members and the second guide members slide relative to each other, so as to realize the switching between the first guide members and the second guide members in staggered distribution and stacked distribution.

[0014] As a further improvement of one embodiment of the present invention, the second guide member is composed of a second boss and a second slope, and the first guide member is composed of a first boss and a first slope; the first slope and the second slope are tangentially arranged, and rotating the rotating cover can make the first guide member and the second guide member slide along the slope; the stacking distribution is that the second boss is pressed onto the first boss.

[0015] As a further improvement of one embodiment of the present invention, the distance between two adjacent second guide members is sufficient to accommodate the placement of the first guide member; the distance between two adjacent first guide members is sufficient to accommodate the placement of the second guide member.

[0016] As a further improvement of one embodiment of the present invention, a stop block is provided on the inner side of the first boss, the height of the stop block is higher than the height of the first boss, and the stop block surrounds the second through hole to form a circular storage area; a columnar boss is provided at the center of the inner groove, the first through hole passes through the center of the columnar boss, and the columnar boss can be adapted to be placed in the circular storage area.

[0017] As a further improvement of one embodiment of the present utility model, the lower end of the guide platform is provided with a slot for inserting one end of the unlocking bolt, and the second through hole communicates with the slot.

[0018] As a further improvement of one embodiment of the present invention, the rotating cover has an upwardly protruding handle, and the handle is provided with a mounting groove communicating with the first through hole.

[0019] As a further improvement of one embodiment of the present invention, the end face of the rotating cover is provided with an auxiliary marking diagram, which is located on both sides of the handle.

[0020] As a further improvement of one embodiment of the present invention, the inner groove is centrally disposed on the rotating cover; the disc boss is centrally disposed on the guide platform.

[0021] In use, rotate the rotating cover. When the first guide and the second guide are misaligned, the hub motor is in normal mode. When the second boss moves above the first boss, the unlocking bolt is lifted, and the hub motor is in unlocked mode.

[0022] The above technical solution has the following advantages: by using a rotating cover and a guide platform, the switching between the normal mode and the unlocking mode of the hub motor can be quickly realized, improving its ease of use. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model installed on a hub motor.

[0026] Figure 2 An exploded view diagram provided for Embodiment 1 of this utility model.

[0027] Figure 3 This is a schematic diagram of the first state of the rotating cover provided in Embodiment 1 of this utility model.

[0028] Figure 4 This is a schematic diagram of the second state of the rotating cover provided in Embodiment 1 of this utility model.

[0029] Figure 5 This is a bottom view of the rotating cover provided in Embodiment 1 of this utility model.

[0030] Figure 6 This is a schematic diagram of the first state of the guide platform provided in Embodiment 1 of this utility model.

[0031] Figure 7 This is a schematic diagram of the second state of the guide platform provided in Embodiment 1 of this utility model.

[0032] Figure 8 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0033] In the picture:

[0034] 1. Rotating cover;

[0035] 11. Inner groove;

[0036] 12. First through hole;

[0037] 13. Second guide component;

[0038] 131. Second protrusion;

[0039] 132. The second slope;

[0040] 14. Handle;

[0041] 15. Mounting slot;

[0042] 16. Columnar boss;

[0043] 2. Guide platform;

[0044] 21. Circular boss;

[0045] 22. Second through hole;

[0046] 23. First guide component;

[0047] 231. First boss;

[0048] 232. First slope;

[0049] 233. Stop;

[0050] 24. Card slot;

[0051] 100. Unlocking device;

[0052] 200. Hub motor;

[0053] 201. Unlocking bolts;

[0054] 202. Pressure sleeve;

[0055] 203. Spring;

[0056] 204. Armature plate;

[0057] 205. Friction disc;

[0058] 300. External thread structure. Detailed Implementation

[0059] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0060] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0061] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model. Example 1

[0062] See Figures 1-7 As shown, an unlocking device 100 for a wheelchair motor includes a rotating cover 1 and a guide platform 2, which are mounted on the unlocking bolt 201 of a hub motor 200 (refer to CN108270318B). By rotating the rotating cover 1 horizontally, the height distance between the rotating cover 1 and the guide platform 2 is adjusted, thereby realizing the vertical lifting and lowering movement of the unlocking bolt 201 and achieving the unlocking function.

[0063] The lower end of the rotating cover 1 has a circular inner groove 11, and a first through hole 12 is provided at the center of the inner groove 11. Several protruding second guide members 13 are evenly arranged around the inner circumference of the inner groove 11 surrounding the first through hole 12. The second guide member 13 is composed of a second boss 131 and a second ramp 132. The second boss 131 has a certain height and width, and the second ramp 132 is inclined at a certain angle to provide guidance for subsequent cooperation with the first guide member 23.

[0064] The upper end of the guide platform 2 is a disc boss 21, which can be fitted into the inner groove 11. A second through hole 22 is provided at the center of the disc boss 21. The first through hole 12 and the second through hole 22 correspond to each other to ensure that the bolt can pass smoothly through the first through hole 12 and the second through hole 22 and be locked onto the unlocking bolt 201, so that the unlocking device 100 is firmly installed on the unlocking bolt 201. Around the disc boss 21 with the second through hole 22, several raised first guide members 23 are evenly arranged circumferentially. The first guide member 23 is composed of a first boss 231 and a first ramp 232. Its structure is similar to that of the second guide member 13, but the specific size and angle can be optimized according to actual needs.

[0065] During operation, the first ramp 232 and the second ramp 132 are tangentially arranged, and the different modes of the hub motor 200 can be switched by rotating the rotating cover 1. When the first guide 23 and the second guide 13 are in a staggered distribution, the hub motor 200 is in normal mode. At this time, the unlocking bolt 201 remains in its initial position, the pressure sleeve 202 connected to the unlocking bolt 201 is in its normal position, the spring 203 is in a naturally extended state, the armature plate 204 acts on the friction plate 205, and the hub motor 200 is controlled by the built-in electromagnetic braking device and is in normal braking operation.

[0066] When the first guide member 23 and the second guide member 13 are stacked, when the second boss 131 moves above the first boss 231, the unlocking bolt 201 is lifted, and the hub motor 200 enters the unlocking mode. At this time, the pressure sleeve 202 is lifted upward with the unlocking bolt 201, the spring 203 is compressed, the armature disk 204 no longer acts on the friction disk 205, and the hub motor 200 is disengaged from the control of the built-in electromagnetic braking device and remains in an operable state. When returning to the normal mode, the unlocking bolt 201 returns to its original state, and under the elastic force of the spring 203, the pressure sleeve 202 and the armature disk 204 move downward, and the hub motor 200 is once again controlled by the built-in electromagnetic braking device.

[0067] In this embodiment, three second guide members 13 are provided, evenly distributed around the inner groove 11 in the circumference of the first through hole 12, with sufficient distance between adjacent second guide members 13 to accommodate the placement of the first guide member 23. Correspondingly, three first guide members 23 are also provided, evenly distributed around the disc boss 21 in the circumference of the second through hole 22, with sufficient distance between adjacent first guide members 23 to accommodate the placement of the second guide member 13. Of course, the number of first guide members 23 and second guide members 13 is not limited to three. In practical applications, their number can be flexibly adjusted according to specific needs, for example, set to two, four, or even more. The protection scope of this utility model is not limited to the specific case where the number of guide members is three.

[0068] By configuring the number and spacing of the guide components in this way, a stable and smooth working relationship can be achieved between the guide components when the rotating cover 1 and the guide platform 2 switch between normal and unlocking modes. This layout effectively avoids malfunctions of the unlocking device 100 caused by collisions or jamming of the guide components, significantly improving the reliability and stability of the unlocking operation and ensuring the normal operation of the wheelchair motor unlocking function.

[0069] Furthermore, a stop 233 is provided on the disc boss 21 inside the first boss 231. The stop 233 is higher than the first boss 231 and surrounds the second through hole 22 to form a circular storage area. This circular storage area can play a certain positioning and limiting role.

[0070] Meanwhile, a cylindrical boss 16 is provided at the center of the inner groove 11, and the first through hole 12 passes through the center of the cylindrical boss 16. The size of the cylindrical boss 16 is adapted to the circular storage area, and it can be set exactly within the circular storage area. This structural design not only enhances the stability of the cooperation between the rotating cover 1 and the guide platform 2, but also protects and guides the components during the installation and operation of the unlocking device 100, thereby improving the overall reliability.

[0071] In this embodiment, the lower end of the guide platform 2 is provided with a slot 24 for inserting one end of the unlocking bolt 201, and the second through hole 22 is connected to the slot 24. This design allows one end of the unlocking bolt 201 to be stably inserted into the slot 24. After the bolt passes through the first through hole 12 and the second through hole 22, it is locked with the unlocking bolt 201, ensuring that the unlocking device 100 is securely installed on the unlocking bolt 201. At the same time, the connecting structure facilitates the installation operation of the bolt.

[0072] The rotating cover 1 has an upwardly protruding handle 14, and a mounting groove 15 communicating with the first through hole 12 is provided on the handle 14. The mounting groove 15 can be used to install some auxiliary components, such as mounting washers, to improve the stability of bolt installation. The use of the handle 14 also makes it convenient for users to operate the rotating cover 1.

[0073] In addition, the rotating cover 1 has a diagram on its end face to assist the user. The diagram is located on both sides of the handle 14 and can intuitively indicate the operation direction and mode switching method to the user. Moreover, the inner groove 11 is centrally located on the rotating cover 1, and the disc protrusion 21 is centrally located on the guide platform 2. This central design ensures the balance and stability of the rotating cover 1 and the guide platform 2, which is conducive to the normal operation of the unlocking device 100. Example 2

[0074] Combination Figure 1 , Figure 8As shown, an unlocking device for a wheelchair motor includes a rotating cover 1 and a guide platform 2, which are mounted on the unlocking bolt 201 of the hub motor. By rotating the rotating cover 1 horizontally, the height distance between the rotating cover 1 and the guide platform 2 is adjusted, thereby realizing the vertical lifting and lowering movement of the unlocking bolt 201 and achieving the unlocking function.

[0075] Compared to Embodiment 1, where the height of the rotating cover is changed via a ramp step using the first and second guide members, this embodiment uses a threaded connection between the rotating cover 1 and the guide platform 2 to adjust the height of the rotating cover 1. Specifically, the lower end of the rotating cover 1 has a circular inner groove with a first through hole at its center, and an internal thread structure on the inner wall of the inner groove. The upper end of the guide platform 2 is a disc boss, and the outer end face of the disc boss has an external thread structure 300. This external thread structure 300 is adapted to the internal thread structure of the inner groove, allowing the disc boss to be threadedly connected within the inner groove.

[0076] A second through hole is provided at the center of the disc boss. The first and second through holes correspond vertically to ensure that the bolt can pass smoothly through the first and second through holes and be locked onto the unlocking bolt 201, so that the unlocking device is securely installed on the unlocking bolt 201. Similar to Embodiment 1, a slot for inserting one end of the unlocking bolt 201 is provided at the lower end of the guide platform 2, and the second through hole and the slot are interconnected.

[0077] The unlocking device in this embodiment is used in the same way as the unlocking device in Embodiment 1. Both only require horizontally twisting the angle of the rotating cover 1 to switch the hub motor 200 between normal mode and unlocking mode.

[0078] The unlocking device 100 provided by this utility model, through the ingenious design and application of the rotating cover 1 and the guide platform 2, can efficiently achieve rapid switching between the normal mode and the unlocking mode of the hub motor 200. Users can flexibly switch between the two modes simply by rotating the rotating cover 1, without complicated operations, greatly saving time and effort, significantly improving the ease of use of the hub motor 200, and meeting the needs of wheelchair use in different scenarios.

[0079] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0080] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0081] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0082] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An unlocking device for a wheelchair motor, characterized in that, include: A guide platform, the upper end of which is a disc boss, and a second through hole is provided at the center of the disc boss; A rotating cover, wherein the lower end of the rotating cover is provided with an inner groove for placing the disc boss, and the rotating cover is provided with a first through hole communicating with the inner groove; The first through hole and the second through hole are vertically aligned. After the bolt passes through the first through hole and the second through hole, it is locked onto the unlocking bolt, so that the unlocking device is installed on the unlocking bolt. The rotating cover can rotate horizontally relative to the guide table and adjust the height distance between the rotating cover and the guide table, thereby driving the unlocking bolt to move axially.

2. The unlocking device according to claim 1, characterized in that: The guide platform and the rotating cover are connected by a threaded connection or by a ramp step to allow for height adjustment between the rotating cover and the guide platform.

3. The unlocking device according to claim 2, characterized in that: The inner groove is a circular structure with an internal thread structure on its inner wall; the outer end face of the disc boss is provided with an external thread structure, which is adapted to the internal thread structure of the inner groove, so that the disc boss is threadedly connected in the inner groove.

4. The unlocking device according to claim 2, characterized in that: A plurality of raised second guide members are uniformly arranged circumferentially around the inner groove of the first through hole, and a plurality of raised first guide members are uniformly arranged circumferentially around the disc boss of the second through hole. Rotating the rotating cover allows the first guide members and the second guide members to slide relative to each other, thereby enabling the first guide members and the second guide members to switch back and forth between staggered distribution and stacked distribution.

5. The unlocking device according to claim 4, characterized in that: The second guide member consists of a second boss and a second ramp, and the first guide member consists of a first boss and a first ramp; the first ramp and the second ramp are tangentially arranged, and rotating the rotating cover allows the first guide member and the second guide member to slide along the ramp surface; the stacking distribution is that the second boss is pressed onto the first boss.

6. The unlocking device according to claim 5, characterized in that: The inner side of the first boss is provided with a stop block on the disc boss. The height of the stop block is higher than the height of the first boss. The stop block surrounds the second through hole to form a circular storage area. A columnar boss is provided at the center of the inner groove. The first through hole passes through the center of the columnar boss. The columnar boss can be adapted to be placed in the circular storage area.

7. The unlocking device according to any one of claims 1 to 6, characterized in that: The lower end of the guide platform is provided with a slot for inserting one end of the unlocking bolt, and the second through hole communicates with the slot.

8. The unlocking device according to claim 1, characterized in that: The rotating cover has an upwardly protruding handle, and the handle is provided with a mounting groove that communicates with the first through hole.

9. The unlocking device according to claim 8, characterized in that: The rotating cover has an auxiliary logo on its end face, located on both sides of the handle.

10. The unlocking device according to claim 1, characterized in that: The inner groove is centrally located on the rotating cover; the disc boss is centrally located on the guide platform.

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