A cycloid needle electric wheelchair

Abstract

The utility model relates to a cycloid electric wheelchair, which includes a wheelchair body and wheels arranged on the wheelchair body; the cycloid electric wheelchair also includes a cycloid motor, the cycloid motor includes a body and a cycloid reduction mechanism, the body is installed on the wheelchair body, the body is connected to the wheel through the cycloid reduction mechanism to drive the wheel to rotate, so that the wheel drives the wheelchair body to move. The electric wheelchair of the utility model adopts a cycloid motor to replace the spur gearbox motor in the prior art, which can effectively improve the transmission efficiency and service life of the wheelchair reduction box, reduce noise; reduce volume and weight, improve load-bearing capacity; facilitate user operation; have good adaptability, and are suitable for a variety of wheelchair models.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction motors, in particular to a cycloid needle electric wheelchair. Background Art

[0002] The wheelchair drive motor in the prior art uses a spur gear box structure, most of which are noisy, large in size and heavy in weight. Due to the single tooth meshing, the load capacity is insufficient, which increases the overall size and weight of the wheelchair. It is inconvenient to operate. It has poor adaptability and is difficult to meet the needs of different wheelchair users, resulting in insufficient comfort for users and inconvenient installation. Utility Model Content

[0003] In view of this, the utility model provides a cycloid needle electric wheelchair, which mainly solves the technical problems that the existing wheelchair driving motor adopts a spur gear box structure, resulting in large noise, volume and weight.

[0004] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0005] The embodiment of the utility model provides a cycloidal electric wheelchair, which comprises a wheelchair body and wheels arranged on the wheelchair body;

[0006] Among them, the cycloid electric wheelchair also includes a cycloid motor, which includes a body and a cycloid reduction mechanism. The body is installed on the wheelchair body, and the body is connected to the wheel through the cycloid reduction mechanism to drive the wheel to rotate, so that the wheel drives the wheelchair body to move.

[0007] In some embodiments, the cycloid reduction mechanism has an output shaft, and the cycloid reduction mechanism is connected to the wheel via the output shaft to drive the wheel to rotate.

[0008] In some embodiments, a reduced shaft section is provided at one end of the output shaft, a clamping platform is formed between the reduced shaft section and the output shaft, and the reduced shaft section has an external thread section;

[0009] The output shaft is provided with a keyway, and the output shaft is connected to the wheel key through the keyway, and the reduced shaft section passes through the wheel. The cycloid needle electric wheelchair also includes a nut, and the nut is threadedly connected to the external thread section and abuts on the card table to limit the axial position of the wheel and prevent the wheel from loosening from the output shaft.

[0010] In some embodiments, the cycloid needle reduction mechanism includes an eccentric shaft, a needle roller seat, a first cycloid gear, a second cycloid gear, a shaft pin and an output flange; the needle roller seat has an inner hole, and the inner hole has a plurality of needle rollers arranged in sequence along the circumferential direction;

[0011] The eccentric shaft is provided with a first eccentric portion and a second eccentric portion in sequence along the axial direction, the first cycloid gear is sleeved on the first eccentric portion, and the second cycloid gear is sleeved on the second eccentric portion; the first cycloid gear and the second cycloid gear are both provided with a plurality of limiting holes arranged in sequence along the circumferential direction, the shaft pins are fixed on the output flange, the number of the shaft pins is equal to the number of the upper limit holes of the first cycloid gear and the number of the upper limit holes of the second cycloid gear, and each shaft pin is used to be inserted into the limiting holes on the first cycloid gear and the limiting holes on the second cycloid gear in a one-to-one correspondence;

[0012] The eccentric shaft is used to drive the first cycloid gear and the second cycloid gear to move, and the first cycloid gear and the second cycloid gear drive the output flange to rotate through the shaft pins, and the first cycloid gear and the second cycloid gear are used to cooperate with the needle roller in the needle roller seat, so that the rotation speed of the output flange is less than the rotation speed of the eccentric shaft;

[0013] The output shaft is fixed on the output flange, and the machine body is used to drive the eccentric shaft to rotate so as to be connected with the cycloid needle reduction mechanism through the eccentric shaft.

[0014] In some embodiments, the body includes a stator and a rotor sleeved on the outside of the stator, the needle roller seat extends into the inner hole of the stator, and the rotor is connected to the eccentric shaft; wherein the stator is used to drive the rotor to rotate, so that the rotor drives the eccentric shaft to rotate.

[0015] In some embodiments, the rotor is fixedly connected to the eccentric shaft via a bearing fixing seat;

[0016] The bearing fixing seat is sleeved on the eccentric shaft, and a bearing is sleeved between the bearing fixing seat and the portion of the needle roller seat extending into the inner hole of the stator; the bearing fixing seat is connected to the rotor through a connecting piece.

[0017] In some embodiments, the body has a casing, the cycloid needle reduction mechanism is arranged in the casing, the casing is provided with a connecting block, the connecting block is provided with through holes passing through both ends, and bolts are used to pass through the through holes to fix the body to the wheelchair body.

[0018] In some embodiments, a connecting column is provided on the connecting block, the through hole is provided on the connecting column, the connecting column protrudes from the connecting block, and a portion of the connecting column protruding from the connecting block is snap-fitted to the wheelchair body.

[0019] In some embodiments, one end of the connecting column protrudes from one end of the connecting block, and the other end of the connecting column protrudes from the other end of the connecting block.

[0020] In some embodiments, when the body includes a stator and a rotor sleeved outside the stator, the stator and the rotor are both arranged inside the housing.

[0021] By means of the above technical solution, the utility model cycloid needle electric wheelchair has at least the following beneficial effects:

[0022] 1. The electric wheelchair of the utility model adopts a cycloidal needle motor to replace the spur gear box motor in the prior art, which can effectively improve the transmission efficiency and service life of the wheelchair reduction box, reduce noise; reduce volume and weight, improve load-bearing capacity; facilitate user operation; have good adaptability, and are suitable for a variety of wheelchair models.

[0023] 2. Optimize the motor structure and improve the energy conversion efficiency, thereby extending the battery life;

[0024] 3. Easy to repair and replace parts to extend service life;

[0025] 4. It has locking protection function to ensure the safety of users during use.

[0026] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a cycloidal needle motor provided by one embodiment of the utility model;

[0029] Figure 2 It is a cross-sectional view of a cycloidal needle motor provided by one embodiment of the utility model;

[0030] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0031] Figure numerals: 1. casing; 2. output shaft; 3. connecting block; 4. connecting column; 5. body; 6. eccentric shaft; 7. output flange; 8. needle roller seat; 9. bearing fixing seat; 10. bearing; 11. rear cover; 12. needle roller; 13. first cycloid gear; 14. second cycloid gear; 15. shaft pin; 21. reduced shaft section; 22. card table; 51. stator; 52. rotor; 81. part of the needle roller seat extending into the inner hole of the stator; 201. keyway; 401. through hole; 501. inner hole; 100. cycloid needle motor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] like Figures 1 to 3 As shown, an embodiment of the utility model provides a cycloidal electric wheelchair, which includes a wheelchair body and wheels arranged on the wheelchair body. The wheelchair body moves through the wheels, such as moving forward, backward or turning.

[0036] The cycloid electric wheelchair further comprises a cycloid motor 100, which comprises a body 5 and a cycloid speed reducing mechanism, wherein the body 5 is mounted on the aforementioned wheelchair body. The body 5 is connected to the wheel through the cycloid speed reducing mechanism to drive the wheel to rotate, so that the wheel drives the wheelchair body to move.

[0037] In the above example, the electric wheelchair of the utility model adopts a cycloidal needle motor 100 to replace the spur gear box motor in the prior art, which can effectively improve the transmission efficiency and service life of the wheelchair reduction box, reduce noise; reduce volume and weight, and improve load-bearing capacity; facilitate user operation; have good adaptability and are suitable for a variety of wheelchair models.

[0038] like Figure 1 As shown, the aforementioned cycloid pin reduction mechanism may have an output shaft 2, and the cycloid pin reduction mechanism is connected to the aforementioned wheel through the output shaft 2 to drive the wheel to rotate. Specifically, the wheel can be fixed on the output shaft 2 to facilitate the output shaft 2 to drive the wheel to rotate.

[0039] In order to connect the output shaft 2 to the wheels, Figure 1 As shown, one end of the aforementioned output shaft 2 may be provided with a reduced shaft section 21, and the reduced shaft section 21 may be integrally formed on the output shaft 2, and the axes of the two coincide. A clamping table 22 is formed between the reduced shaft section 21 and the output shaft 2, and the reduced shaft section 21 has an external thread section. A keyway 201 is provided on the output shaft 2, and the output shaft 2 is connected to the wheel key through the keyway 201. The aforementioned reduced shaft section 21 passes through the wheel, and the cycloidal needle electric wheelchair also includes a nut, which is threadedly connected to the external thread section and abuts against the clamping table 22, and the nut limits the axial position of the wheel to prevent the wheel from loosening from the output shaft 2.

[0040] In the above example, the nut can abut against the clamping platform 22. When the nut is screwed to the position of the clamping platform 22, it means that it is installed in place, which prevents the wheel from being installed too tight due to excessive screwing of the nut.

[0041] In order to realize the function of the aforementioned cycloid needle reduction mechanism, Figure 2 and Figure 3As shown, the aforementioned cycloid pin reduction mechanism may include an eccentric shaft 6, a needle roller seat 8, a first cycloid gear 13, a second cycloid gear 14, an axle pin 15 and an output flange 7. The needle roller seat 8 has an inner hole 501, and the inner hole 501 has a plurality of needle rollers 12 arranged in sequence along the circumferential direction. The eccentric shaft 6 is provided with a first eccentric portion and a second eccentric portion in sequence along the axial direction. The first cycloid gear 13 is sleeved on the first eccentric portion, and the second cycloid gear 14 is sleeved on the second eccentric portion. Both the first cycloid gear 13 and the second cycloid gear 14 are provided with a plurality of limiting holes arranged in sequence along the circumferential direction, and the axle pin 15 is fixed on the output flange 7. The number of axle pins 15 is equal to the number of upper limit holes of the first cycloid gear 13 and the number of upper limit holes of the second cycloid gear 14. Each axle pin 15 is used to be inserted into the limiting hole on the first cycloid gear 13 and the limiting hole on the second cycloid gear 14 in a one-to-one correspondence. Among them, the eccentric shaft 6 is used to drive the first cycloid gear 13 and the second cycloid gear 14 to move, and the first cycloid gear 13 and the second cycloid gear 14 drive the output flange 7 to rotate through each shaft pin 15. The first cycloid gear 13 and the second cycloid gear 14 are used to cooperate with the needle roller 12 in the needle roller seat 8, so that the rotation speed of the output flange 7 is lower than the rotation speed of the eccentric shaft 6. The aforementioned output shaft 2 is fixed on the output flange 7, for example, clamped on the output flange 7. The aforementioned body 5 is used to drive the eccentric shaft 6 to rotate, so as to be connected to the cycloid needle reduction mechanism through the eccentric shaft 6.

[0042] In the above example, the aforementioned base drives the eccentric shaft 6 to rotate, the eccentric shaft 6 drives the first cycloid gear 13 and the second cycloid gear 14 to rotate, the first cycloid gear 13 and the second cycloid gear 14 drive the output flange 7 to rotate through the shaft pin 15, and the output flange 7 drives the output shaft 2 to rotate.

[0043] In some embodiments, Figure 2 and Figure 3 As shown, the aforementioned body 5 may include a stator 51 and a rotor 52 sleeved on the outside of the stator 51. The aforementioned needle roller seat 8 extends into the inner hole 501 of the stator 51, and the needle roller seat 8 and the inner hole 501 of the stator 51 may be interference fit, so that the needle roller seat 8 and the stator 51 can remain relatively fixed. The aforementioned rotor 52 is connected to the eccentric shaft 6. Among them, the stator 51 is used to drive the rotor 52 to rotate, so that the rotor 52 drives the eccentric shaft 6 to rotate.

[0044] In the above example, since the needle roller seat 8 extends into the inner hole 501 of the stator 51, the aforementioned first cycloid gear 13 and the second cycloid gear 14 are both arranged in the needle roller seat 8, so that the space in the inner hole 501 of the stator 51 can be fully utilized. In this way, the space in the height direction of the cycloid needle motor 100 can be saved, the cycloid needle motor 100 can be flattened, the output torque can be increased, the noise can be reduced, and the service life can be improved.

[0045] In some embodiments, Figure 3 As shown, the aforementioned rotor 52 can be fixedly connected to the eccentric shaft 6 through a bearing fixing seat 9. The bearing fixing seat 9 is sleeved on the eccentric shaft 6, and a bearing 10 is sleeved between the bearing fixing seat 9 and the portion 81 of the needle roller seat extending into the inner hole of the stator. The bearing fixing seat 9 can be connected to the rotor 52 through a connecting piece. The connecting piece can be in the shape of a hub.

[0046] In the above example, by sleeve-arranging the bearing 10 between the bearing fixing seat 9 and the portion 81 of the needle roller seat extending into the inner hole of the stator, the bearing 10 can provide radial support for the eccentric shaft 6, so that the eccentric shaft 6 can rotate stably.

[0047] In order to install the body 5 of the cycloid needle motor 100 on the wheelchair body, as shown in FIG. Figure 1 As shown, the aforementioned machine body 5 may have a housing 1, and the aforementioned cycloid pin reduction mechanism is arranged in the housing 1, so that the housing 1 can provide a shell protection for the cycloid pin reduction mechanism. The housing 1 is provided with a connecting block 3, and the connecting block 3 can be integrally formed on the housing 1. The connecting block 3 may be provided with through holes 401 passing through both ends, and bolts are used to pass through the through holes 401 to fix the machine body 5 on the wheelchair body.

[0048] In the above example, the wheelchair body is fixedly connected to the body 5 of the cycloid needle motor 100 by bolts, wherein the bolts pass through the through holes 401 on the body 5 to fix it on the wheelchair body.

[0049] like Figure 1 As shown, the aforementioned connection block 3 may be provided with a connection column 4, and the aforementioned through hole 401 is provided on the connection column 4. The connection column 4 protrudes from the connection block 3, and the portion of the connection column 4 protruding from the connection block 3 is clamped on the wheelchair body.

[0050] In the above example, the body 5 is fixed to the wheelchair body by bolts on one hand, and is also clamped to the wheelchair body by the connecting column 4 on the other hand, so that the connection stability between the body 5 and the wheelchair body can be improved.

[0051] like Figure 1 As shown, one end of the aforementioned connecting column 4 protrudes from one end of the connecting block 3, and the other end of the connecting column 4 protrudes from the other end of the connecting block 3. Both ends of the connecting column 4 are clamped on the wheelchair body, which can further improve the connection stability between the body 5 and the wheelchair body.

[0052] like Figure 2 As shown, when the body 5 includes a stator 51 and a rotor 52 sleeved on the outside of the stator 51 , the stator 51 and the rotor 52 are both arranged inside the housing 1 .

[0053] It should be noted here that: Figure 2 As shown, the housing 1 has a rear cover 11 , and the eccentric shaft 6 extends out of the rear cover 11 .

[0054] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A cycloid needle electric wheelchair, characterized in that: It comprises a wheelchair body and wheels arranged on the wheelchair body; The cycloid electric wheelchair further comprises a cycloid motor (100), the cycloid motor (100) comprising a body (5) and a cycloid speed reduction mechanism, the body (5) being mounted on the wheelchair body, the body (5) being connected to the wheel via the cycloid speed reduction mechanism to drive the wheel to rotate, so that the wheel drives the wheelchair body to move; The cycloid pin reduction mechanism has an output shaft (2), and the cycloid pin reduction mechanism is connected to the wheel via the output shaft (2) to drive the wheel to rotate; A reduced shaft section (21) is provided at one end of the output shaft (2), a clamping platform (22) is formed between the reduced shaft section (21) and the output shaft (2), and the reduced shaft section (21) has an external thread section; The output shaft (2) is provided with a keyway (201), the output shaft (2) is connected to the wheel key via the keyway (201), the reduced shaft section (21) passes through the wheel, and the cycloidal needle electric wheelchair further comprises a nut, the nut is threadedly connected to the external thread section and abuts against the clamping table (22) to limit the axial position of the wheel and prevent the wheel from loosening from the output shaft (2); The cycloid needle reduction mechanism comprises an eccentric shaft (6), a needle roller seat (8), a first cycloid gear (13), a second cycloid gear (14), a shaft pin (15) and an output flange (7); the needle roller seat (8) has an inner hole (501), and the inner hole (501) has a plurality of needle rollers (12) arranged in sequence along the circumferential direction; The eccentric shaft (6) is provided with a first eccentric portion and a second eccentric portion in sequence along the axial direction; the first cycloid gear (13) is sleeved on the first eccentric portion, and the second cycloid gear (14) is sleeved on the second eccentric portion; the first cycloid gear (13) and the second cycloid gear (14) are both provided with a plurality of limiting holes arranged in sequence along the circumferential direction; the shaft pin (15) is fixed on the output flange (7); the number of the shaft pins (15) is equal to the number of the upper limit holes of the first cycloid gear (13) and the number of the upper limit holes of the second cycloid gear (14); each shaft pin (15) is used to be inserted into the limiting hole on the first cycloid gear (13) and the limiting hole on the second cycloid gear (14) in a one-to-one correspondence; The eccentric shaft (6) is used to drive the first cycloid gear (13) and the second cycloid gear (14) to move, and the first cycloid gear (13) and the second cycloid gear (14) drive the output flange (7) to rotate through the shaft pins (15), and the first cycloid gear (13) and the second cycloid gear (14) are used to cooperate with the needle roller (12) in the needle roller seat (8), so that the rotation speed of the output flange (7) is less than the rotation speed of the eccentric shaft (6); The output shaft (2) is fixed on the output flange (7), and the machine body (5) is used to drive the eccentric shaft (6) to rotate, so as to be connected to the cycloid needle reduction mechanism through the eccentric shaft (6).

2. The cycloid needle electric wheelchair according to claim 1, characterized in that: The machine body (5) comprises a stator (51) and a rotor (52) sleeved on the outside of the stator (51); the needle roller seat (8) extends into the inner hole (501) of the stator; and the rotor (52) is connected to the eccentric shaft (6); wherein the stator (51) is used to drive the rotor (52) to rotate, so that the rotor (52) drives the eccentric shaft (6) to rotate.

3. The cycloid needle electric wheelchair according to claim 2, characterized in that: The rotor (52) is fixedly connected to the eccentric shaft (6) via a bearing fixing seat (9); The bearing fixing seat (9) is sleeved on the eccentric shaft (6), and a bearing (10) is sleeved between the bearing fixing seat (9) and the portion (81) of the needle roller seat extending into the inner hole of the stator; the bearing fixing seat (9) is connected to the rotor (52) via a connecting piece.

4. The cycloid electric wheelchair according to any one of claims 1 to 3, characterized in that: The machine body (5) comprises a casing (1), the cycloid needle speed reduction mechanism is arranged in the casing (1), a connecting block (3) is provided on the casing (1), and the connecting block (3) is provided with through holes (401) passing through both ends, and bolts are used to pass through the through holes (401) to fix the machine body (5) on the wheelchair body.

5. The cycloid needle electric wheelchair according to claim 4, characterized in that: The connecting block (3) is provided with a connecting column (4), the through hole (401) is arranged on the connecting column (4), the connecting column (4) protrudes from the connecting block (3), and the part of the connecting column (4) protruding from the connecting block (3) is clamped on the wheelchair body.

6. The cycloid needle electric wheelchair according to claim 5, characterized in that: One end of the connecting column (4) protrudes from one end of the connecting block (3), and the other end of the connecting column (4) protrudes from the other end of the connecting block (3).

7. The cycloid needle electric wheelchair according to claim 4, characterized in that: When the machine body (5) comprises a stator (51) and a rotor (52) sleeved on the outside of the stator (51), the stator (51) and the rotor (52) are both arranged inside the casing (1).

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