Driving wheel motor mounting structure of electric wheelchair

Abstract

The utility model discloses a driving wheel motor mounting structure of an electric wheelchair, and belongs to the technical field of daily necessities. The electric wheelchair comprises a wheelchair body provided with a pair of front universal wheels and a pair of rear driving wheels. The middle part of the battery box fixing shaft is connected with the lower part of one side, facing the pair of rear driving wheels, of the vehicle body; the pair of battery boxes are arranged on the left side and the right side of the vehicle body, the driving wheel mounting structure comprises motor connecting seats and motor connecting seat fixing plates, the motor connecting seats are formed at the end parts of one ends of a pair of rear driving wheels, facing the vehicle body, of the pair of battery boxes, and the motor connecting seat fixing plates are formed on motors. The motor connecting seat fixing plate is fixed to the side, facing the motor connecting seat, of the motor connecting seat fixing plate and connected with the motor connecting seat in an inserted and embedded mode. The motor connecting seat transition connecting plate has the advantages that the motor connecting seat transition connecting plate, the motor connecting seat fixing plate, the motor and the rear driving wheel can be conveniently assembled with the motor connecting seat fixed on the battery box by one person, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of daily necessities, and in particular relates to a driving wheel motor mounting structure of an electric wheelchair. Background Art

[0002] Electric wheelchairs, commonly referred to as "electric wheelchairs," are a means of transportation for certain groups, such as the elderly and frail, those with limb and lower limb diseases, the disabled, and patients recovering from surgery in medical clinics. Compared to manual or push wheelchairs, electric wheelchairs offer the following advantages: First, they enhance mobility. Electric wheelchairs can easily navigate various indoor and outdoor terrains thanks to their electric drive, reducing the burden on caregivers and enhancing the user's independence. Second, they enhance safety, as electric wheelchairs are typically equipped with braking systems and anti-rollover devices, enabling emergency braking and reducing the likelihood of accidents. Third, they facilitate diverse and personalized functional needs, such as rehabilitation training programs and customized services. Published Chinese patent literature contains extensive technical information on electric wheelchairs, including CN201379725Y recommending an "obstacle-avoiding electric wheelchair," CN101589979B introducing a "multi-functional electric wheelchair," CN201684098U providing an "electric wheelchair," and CN202682215U disclosing an "electric wheelchair."

[0003] As is well known in the industry, electric wheelchairs in existing technologies, including those in the aforementioned patents, are generally rear-wheel drive because of its advantages of good directional performance, high stability and comfort, and strong traction and stability. The assembly relationship between the pair of motors and the pair of rear wheels in a rear-wheel drive electric wheelchair primarily, but not limited to, includes the following: direct drive, in which the motors are mounted directly on the rear wheels, converting electrical energy into mechanical energy to drive the rear wheels, thereby propelling the vehicle forward; and reduction mechanism connection, in which both the brushless motor and reduction mechanism are mounted outside the electric wheelchair's drive wheel, i.e., the rear wheel hub. The output shaft of the brushless motor is dynamically connected (transmission connection) to the input end of the reduction mechanism, and the output shaft of the reduction mechanism is dynamically connected to the driven wheel hub.

[0004] As is known in the industry, regardless of whether the aforementioned electric wheelchair is driven directly by a motor or by a motor through a reduction mechanism, it is usually necessary to remove the motor together with the rear wheel from the vehicle body during use and maintenance. Specific situations may include motor failure, damage to rear wheel components, regular deep cleaning, lubrication and maintenance, performance upgrades or replacements, adaptation to different needs, collision damage, etc. After completing any one or several of the aforementioned projects, the motor together with the rear wheel needs to be installed on the vehicle body.

[0005] As is known in the industry, a motor connector with a set of bolt holes is typically welded to the end of each battery box (a pair of battery boxes) on either side of the vehicle's structural system (the end facing away from the forward direction of travel, i.e., the end toward the rear of the vehicle). A motor connector fixing plate, similar in shape and size to the motor connector, is mounted on the motor. This plate has a set of motor connector fixing plate bolt holes, equal in number and corresponding in position to the bolt holes on the motor connector. A set of bolts secures the motor connector fixing plate to the motor connector. When the motor needs to be repaired, the aforementioned set of bolts is removed, and vice versa.

[0006] On the surface, there's no apparent confusion in the process of removing the aforementioned set of bolts to separate the motor mount fixing plate, along with the motor and rear wheel, from the motor mount before maintenance, and then reattaching the set of bolts to secure the motor mount fixing plate, along with the motor and rear wheel, to the motor mount after maintenance. However, during assembly, the bolt holes on the motor mount fixing plate must be fully aligned with the bolt holes on the motor mount. Otherwise, even the slightest misalignment can cause interference and prevent the bolts from securing the motor mount fixing plate to the motor mount. Current solutions often involve two people working together: one person lifts (holds) the rear wheel and ensures the bolt holes on the motor mount fixing plate align with the bolt holes on the motor mount, while the other person screws the bolts in. Another solution involves a single person elevating the vehicle using a support, holding or cradling the tire, and aligning the bolt holes on the motor mount fixing plate with the bolt holes on the motor mount while screwing the bolts in. As can be seen from the foregoing, after the maintenance is completed, the operation of fixing the motor connection seat fixing plate together with the motor and the rear wheel to the motor connection seat is very troublesome no matter which method is used, and it will also affect the loading and unloading efficiency. Summary of the Invention

[0007] The purpose of the present utility model is to provide a drive wheel motor mounting structure for an electric wheelchair, which can easily and independently fix the motor connection base fixing plate to the motor connection base without relying on help from others or relying on vehicle body supports, thereby improving assembly efficiency.

[0008] The task of the present utility model is accomplished in this way: a drive wheel motor mounting structure of an electric wheelchair, the electric wheelchair comprising a vehicle body having a pair of front universal wheels and a pair of rear drive wheels, each driven by a motor; a battery box fixed shaft, the middle portion of which is connected to the lower side of the vehicle body facing the pair of rear drive wheels; a pair of battery boxes, which are respectively arranged on the left and right sides of the vehicle body in a state corresponding to each other, and one end is fixed to the vehicle body, and the other end is fixed to the end of the battery box fixed shaft, the drive wheel mounting structure comprises a motor connecting seat formed at each end portion of the pair of battery boxes facing the pair of rear drive wheels of the vehicle body, and a motor connecting seat fixing plate formed on the motor, characterized in that: the drive wheel mounting structure also comprises a motor connecting seat transition connecting plate, which is fixed to the side of the motor connecting seat fixing plate facing the motor connecting seat and is plug-in connected to the motor connecting seat.

[0009] In a specific embodiment of the present invention, a pair of transition connecting plate fixing screw holes are respectively opened on the motor connecting seat fixing plate and located at the upper end and the lower end of the motor connecting seat fixing plate, and a pair of transition connecting plate fixing screws are respectively provided at the upper end and the lower end of the motor connecting seat transition connecting plate and at positions corresponding to the pair of transition connecting plate fixing screw holes. The pair of transition connecting plate fixing screws are fixed to the motor connecting seat fixing plate corresponding to the positions of the pair of transition connecting plate fixing screw holes and are locked by a transition connecting plate fixing screw locking nut screwed on the end of the transition connecting plate fixing screw.

[0010] In another specific embodiment of the present invention, the middle part of the motor connecting seat in the height direction and the side facing away from the transition connecting plate of the motor connecting seat is fixed to one end of the battery box facing the pair of rear drive wheels.

[0011] In another specific embodiment of the present invention, a pair of plug-in flanges are formed in the middle of the height direction of the motor connection seat transition connecting plate facing the motor connection seat, which are laterally parallel to each other and protrude from the surface of the motor connection seat transition connecting plate, and a pair of plug-in flange slots are formed in the middle of the height direction of the motor connection seat facing the motor connection seat transition connecting plate, which are laterally parallel to each other and correspond to the plug-in flanges and are recessed in the surface of the motor connection seat. The pair of plug-in flanges are plugged into and fitted with the pair of plug-in flange slots.

[0012] In another specific embodiment of the present invention, the cross-sectional shape of the pair of inserting flanges is dovetail-shaped, and the cross-sectional shape of the pair of inserting flange slots is also dovetail-shaped.

[0013] In another specific embodiment of the present invention, a pin is provided at the center position of the upper end of the transition connecting plate of the motor connecting seat, and a pin through hole is provided at the center position of the upper end of the motor connecting seat and at a position corresponding to the pin, and the rear end of the pin extends to the rear side of the motor connecting seat through the pin through the hole and is limited by the pin limiting member.

[0014] In a more specific embodiment of the present invention, when the pin shaft limiting component is a cotter pin, a cotter pin insertion hole is opened at the rear end of the pin shaft, and the cotter pin is inserted into the cotter pin insertion hole; and when the pin shaft limiting component is a retaining spring, a retaining spring groove is opened at the rear end of the pin shaft and around the circumferential direction of the pin shaft, and the retaining spring is inserted into the retaining spring groove.

[0015] In a further specific embodiment of the present invention, a battery box electrical connection seat pole socket jack for inserting a pair of poles on the battery connection seat of the battery box is provided in the middle of the height direction of the motor connection seat and at a position corresponding to the front end of the battery box, and an electrical connection wire clearance cavity for allowing the introduction of electrical connection wires to pass through the circuit for electrically connecting the pair of poles to the electrical control box arranged on the vehicle body is also provided at a position corresponding to below the battery box electrical connection seat pole socket.

[0016] In yet another specific embodiment of the present invention, an inserting flange insertion limit position blocking plate for blocking the end face of the inserting flange is formed on the motor connecting seat and at a notch portion corresponding to the inward side of one of the pair of inserting flange slots.

[0017] In yet another specific embodiment of the present invention, the motor is electrically connected to the electrical control box.

[0018] The technical effect of the technical solution provided by the utility model is that: since a motor connection seat transition connecting plate fixed to the motor connection seat fixing plate is added between the motor connection seat and the motor connection seat fixing plate, and since the motor connection seat transition connecting plate and the motor connection seat are designed to be plug-in connected to each other, after inspecting the motor and / or the rear drive wheel, the motor connection seat transition connecting plate together with the motor connection seat fixing plate, the motor and the rear drive wheel can be conveniently assembled with the motor connection seat fixed on the battery box by one person alone without relying on the help of others or the aid of a support member for lifting the vehicle body, thereby meeting the requirement of improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 A magnified view of part A; DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments does not limit the scheme of the present invention. Any equivalent transformation that is merely formal and not substantial based on the concept of the present invention should be regarded as within the scope of the technical solution of the present invention.

[0022] In the following description, all concepts related to directionality or orientation, such as up, down, left, right, front and back, are based on the current Figure 1 The position state is used as a reference, and therefore it cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0023] First, the applicant needs to explain that: except for the detailed description of the drive wheel motor installation structure and its related components, the rest of the Figure 1 The components shown but not described in detail belong to the prior art. For example, please refer to, but not limited to, CN103202748A (Anti-rear-rollover electric wheelchair). In addition, since the drive wheel motor mounting structure involved in the present invention is applicable to all electric wheelchairs in the prior art, the following embodiments are not affected by Figure 1 Limitations of electric wheelchairs of the shown structure.

[0024] See Figure 1 and Figure 2 , showing the structural system of the electric wheelchair, a body 1 having a pair of front universal wheels 11 and a pair of rear drive wheels 12, each driven by a motor 121; a battery box fixed shaft 2, the middle portion of which is connected to a connecting shaft sleeve 131 of an anti-roll wheel frame 13 on the side of the body 1 facing the pair of rear drive wheels 12; and a pair of battery boxes 3, which are respectively arranged on the left and right sides of the body 1 in a left-right corresponding state, with one end fixed to the body 1 and the other end (also referred to as "near the middle" or "near the front") fixed to the end of the battery box fixed shaft 2. A rechargeable battery 132 is plugged in and out of each of the pair of battery boxes 3. Specifically, when the battery needs to be replaced, inspected, maintained, or even charged off the vehicle in some cases (in most cases, charging off the vehicle does not require removal of the battery), the rechargeable battery 32 is removed from the battery box 3, and vice versa. The structure of the drive wheel mounting structure is shown in FIG. 1 , which is formed at one end of the pair of battery boxes 3 facing the pair of rear drive wheels 12 of the vehicle body 1 (ie Figure 1One motor connecting seat 31 of each of the position state of the front end and the rear end) and a motor connecting seat fixing plate 1211 formed on the motor 121.

[0025] The technical points of the technical scheme provided by the utility model are as follows: the structure system of the driving wheel mounting structure further comprises a motor connecting seat transition connecting plate 4, the motor connecting seat transition connecting plate 4 is fixed to the side of the motor connecting seat fixing plate 1211 towards the motor connecting seat 31 and is mutually inserted and connected with the motor connecting seat 31.

[0026] A pair of transition connecting plate fixing screws 41 are respectively arranged at the upper end and the lower end of the motor connecting seat transition connecting plate 4 and at the positions corresponding to the pair of transition connecting plate fixing screw holes 12111, the pair of transition connecting plate fixing screws 41 are fixed to the motor connecting seat fixing plate 1211 at the positions corresponding to the pair of transition connecting plate fixing screw holes 12111 and are locked by transition connecting plate fixing screw locking nuts (not shown in the figure) screwed at the ends of the transition connecting plate fixing screws 41.

[0027] The middle part of the height direction of the motor connecting seat 31 and the side (namely the rear side) opposite to the motor connecting seat transition connecting plate 4 are fixed to the end end of the battery box 3 towards the pair of rear driving wheels 12 (namely the front end end of the battery box 3).

[0028] The middle part of the height direction of the side of the motor connecting seat transition connecting plate 4 towards the motor connecting seat 31 is formed with a pair of mutually vertically parallel and protruding from the surface of the motor connecting seat transition connecting plate 4 inserted flanges 42, and the middle part of the height direction of the side of the motor connecting seat 31 towards the motor connecting seat transition connecting plate 4 is formed with a pair of mutually vertically parallel and corresponding to the inserted flanges 42 and recessed from the surface of the motor connecting seat 31 inserted flange grooves 311, and the pair of inserted flanges 42 and the pair of inserted flange grooves 311 are inserted and matched.

[0029] In the embodiment, the cross-sectional shape of the pair of inserted flanges 42 is dovetail-shaped, and in return, the cross-sectional shape of the pair of inserted flange grooves 311 is also dovetail-shaped.

[0030] A pin shaft 43 is arranged at the central position of the upper end of the motor connecting seat transition connecting plate 4, and a pin shaft passing hole 312 is formed at the central position of the upper end of the motor connecting seat 31 and at the position corresponding to the pin shaft 43, the rear end of the pin shaft 43 extends to the rear side of the motor connecting seat 31 through the pin shaft passing hole 312 and is limited by a pin shaft limiting piece 431.

[0031] In this embodiment, the aforementioned pin shaft limiting member 431 is a cotter pin. Accordingly, a cotter pin insertion hole 432 is opened at the rear end of the aforementioned pin shaft 43, and the pin shaft limiting member 431, which is acted as a cotter pin, is inserted into the cotter pin insertion hole 432. The applicant needs to explain that: if a retaining spring is used for the aforementioned pin shaft limiting member 431, then a retaining spring groove is opened at the rear end of the pin shaft 43 and around the circumferential direction of the pin shaft 43, and the pin shaft limiting member 431, which is acted as a retaining spring, is inserted into the retaining spring groove.

[0032] As a preferred solution, the aforementioned pin 43 can adopt a pull-out spring pin equipped with a spring. In this case, that is, when a spring pin is used, there is no need to use the aforementioned pin limiting member 431, which has the advantages of a simpler structure and more convenient operation.

[0033] See you next time Figure 1 and Figure 2 A battery box electrical connection seat pole insertion hole 313 is provided at the middle portion of the motor connection seat 31 in the height direction, corresponding to the front end of the battery box 3, for inserting a pair of poles on the battery connection seat of the battery box 3. Furthermore, an electrical connection line clearance cavity 314 is provided below the battery box electrical connection seat pole insertion hole 313, for passing an electrical connection line that electrically connects the pair of poles to the electrical control box 5 disposed on the vehicle body 1. The aforementioned line is introduced into the electrical connection line clearance cavity 314 through a cavity opening 3141 of the electrical connection line clearance cavity 314.

[0034] Preferably, a plug-in flange plug-in limit position blocking plate 315 is formed on the aforementioned motor connecting seat 31 and at the groove portion corresponding to the inward side of one of the aforementioned pair of plug-in flange slots 311 for blocking the end face of the aforementioned plug-in flange 42.

[0035] The aforementioned motor 121 is electrically connected to the aforementioned electrical control box 5 through a circuit.

[0036] When the motor 121 needs to be repaired and the motor 121, along with the motor connector fixing plate 1211, needs to be separated from the motor connector 31, the pin 43 restrained by the pin restraining member 431 is first released, that is, the pin restraining member 431 is removed from the pin 43 and the pin 43 is pulled away from the motor connector transition plate 4. Then, while holding the rear drive wheel 12 and the motor 121, a force is applied to the rear drive wheel 12 and the motor 121 in a direction away from the insertion flange insertion limit position blocking plate 315, i.e., toward the outside of the vehicle body. This causes the motor connector fixing plate 1211, along with the motor connector transition plate 4 and the pair of insertion flanges 42 on the motor connector transition plate 4 to withdraw from the pair of insertion flange slots 311, thus completing the separation of the motor 121 from the front end of the battery box 3. After the maintenance of the motor 121 is completed, the above-described process is reversed to complete the installation.

[0037] In summary, the technical solution provided by the present utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A drive wheel motor mounting structure for an electric wheelchair, the electric wheelchair comprising a vehicle body (1) having a pair of front universal wheels (11) and a pair of rear drive wheels (12) each driven by a motor (121); a battery box fixed shaft (2), the middle portion of the battery box fixed shaft (2) being connected to the lower portion of the vehicle body (1) facing the pair of rear drive wheels (12); a pair of battery boxes (3), the pair of battery boxes (3) being respectively arranged on the left and right sides of the vehicle body (1) in a state corresponding to each other, and having one end fixed to the vehicle body (1) and the other end fixed to the end of the battery box fixed shaft (2); the drive wheel mounting structure comprising a motor connecting seat (31) formed at each end portion of the pair of battery boxes (3) facing the pair of rear drive wheels (12) of the vehicle body (1) and a motor connecting seat fixing plate (1211) formed on the motor (121), characterized in that: The drive wheel mounting structure further comprises a motor connection seat transition connecting plate (4), which is fixed to the motor connection seat fixing plate (1211) toward one side of the motor connection seat (31) and is plug-connected with the motor connection seat (31).

2. The drive wheel motor mounting structure of an electric wheelchair according to claim 1, characterized in that: A pair of transition connecting plate fixing screw holes (12111) are respectively provided on the motor connecting seat fixing plate (1211) and at the upper end and the lower end of the motor connecting seat fixing plate (1211); a pair of transition connecting plate fixing screws (41) are respectively provided at the upper end and the lower end of the motor connecting seat transition connecting plate (4) and at positions corresponding to the pair of transition connecting plate fixing screw holes (12111); the pair of transition connecting plate fixing screws (41) are fixed to the motor connecting seat fixing plate (1211) at positions corresponding to the pair of transition connecting plate fixing screw holes (12111) and are locked by transition connecting plate fixing screw locking nuts screwed onto the ends of the transition connecting plate fixing screws (41).

3. The drive wheel motor mounting structure of an electric wheelchair according to claim 1, characterized in that: The middle portion of the motor connection seat (31) in the height direction and the side facing away from the motor connection seat transition connection plate (4) is fixed to one end of the battery box (3) facing the pair of rear drive wheels (12).

4. The drive wheel motor mounting structure of an electric wheelchair according to claim 3, characterized in that: A pair of inserting flanges (42) are formed in the middle of the height direction of the motor connection seat transition connecting plate (4) facing the motor connection seat (31), and are parallel to each other in the vertical direction and protrude from the surface of the motor connection seat transition connecting plate (4). A pair of inserting flange slots (311) are formed in the middle of the height direction of the motor connection seat (31) facing the motor connection seat transition connecting plate (4), and are parallel to each other in the vertical direction and are located corresponding to the inserting flanges (42) and are recessed in the surface of the motor connection seat (31). The pair of inserting flanges (42) are inserted and matched with the pair of inserting flange slots (311).

5. The driving wheel motor mounting structure of an electric wheelchair according to claim 4, characterized in that: The cross-sectional shape of the pair of inserting flanges (42) is dovetail-shaped, and the cross-sectional shape of the pair of inserting flange slots (311) is also dovetail-shaped.

6. The drive wheel motor mounting structure of an electric wheelchair according to claim 4, characterized in that: A pin shaft (43) is provided at a central position on the upper end of the transition connecting plate (4) of the motor connecting seat, and a pin shaft through hole (312) is provided at a central position on the upper end of the motor connecting seat (31) and at a position corresponding to the pin shaft (43). The rear end of the pin shaft (43) extends to the rear side of the motor connecting seat (31) through the pin shaft through hole (312) and is limited by a pin shaft limiting member (431).

7. The drive wheel motor mounting structure of an electric wheelchair according to claim 6, characterized in that: When the pin shaft limiting member (431) is a cotter pin, a cotter pin insertion hole (432) is opened at the rear end of the pin shaft (43), and the cotter pin is inserted into the cotter pin insertion hole (432); and when the pin shaft limiting member (431) is a retaining spring, a retaining spring groove is opened at the rear end of the pin shaft (43) and around the circumferential direction of the pin shaft (43), and the retaining spring is inserted into the retaining spring groove.

8. The drive wheel motor mounting structure of an electric wheelchair according to claim 1, characterized in that: A battery box electrical connection seat pole plug hole (313) for inserting a pair of poles on the battery connection seat of the battery box (3) is provided at the middle of the height direction of the motor connection seat (31) and at a position corresponding to the front end of the battery box (3), and an electrical connection line clearance cavity (314) for allowing an introduced electrical connection line to pass through a line electrically connecting the pair of poles to an electrical control box (5) provided on the vehicle body (1) is also provided at a position corresponding to the lower portion of the battery box electrical connection seat pole plug hole (313).

9. The driving wheel motor mounting structure of an electric wheelchair according to claim 4, characterized in that: An inserting flange inserting limit position blocking plate (315) for blocking the end face of the inserting flange (42) is formed on the motor connecting seat (31) and at a notch portion corresponding to the inner side of one of the pair of inserting flange slots (311).

10. The driving wheel motor mounting structure of an electric wheelchair according to claim 8, characterized in that: The motor (121) is electrically connected to the electrical control box (5).

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