Trolley wheel driving mechanism

Abstract

The utility model provides a cart wheel driving mechanism which comprises a driving box, a driven belt wheel, a driving motor and a transmission belt. A wheel shaft is rotationally arranged in the driving box; a driving wheel is arranged at one end of the wheel shaft; the driven belt wheel is arranged on the inner side of the driving box, and the driven belt wheel is connected with the driving wheel; the driving motor is arranged on the driving box, a reduction gear set is connected to a main shaft of the driving motor, and a driving belt wheel is arranged at the output end of the reduction gear set; the transmission belt is connected between the driving belt wheel and the driven belt wheel. According to the cart wheel driving mechanism, the reduction ratio between the driving belt wheel and the driven belt wheel is effectively reduced, the radius of the driven belt wheel is reduced, and therefore the radial size of the driving box of the driving mechanism can be reduced.

Description

Technical Field

[0001] The utility model belongs to the field of children's carriers, and in particular relates to a wheel driving mechanism for a cart. Background Art

[0002] Baby strollers or child carriages have more and more functions, and the body is getting heavier. For the elderly, it is more laborious to push the baby strollers or child carriages. In order to facilitate the elderly or free up the hands of the users, it is necessary to add a driving mechanism to the household strollers to achieve electric power assistance or even automatic driving functions. The deceleration of the driving mechanism of existing baby strollers or child carriages is relatively large, resulting in a large radial dimension of the housing of the driving mechanism at the axle of the driving wheel, which reduces the chassis height at the driving wheel, affects the obstacle crossing performance of the stroller, and is not harmonious in appearance. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a cart wheel driving mechanism, comprising:

[0004] A driving box, wherein a wheel axle is rotatably arranged in the driving box, and a driving wheel is arranged at one end of the wheel axle;

[0005] A driven pulley, the driven pulley is arranged on the inner side of the driving box, and the driven pulley is connected to the driving wheel;

[0006] A driving motor, wherein the driving motor is arranged on the driving box, a reduction gear set is connected to the main shaft of the driving motor, and a driving pulley is arranged at the output end of the reduction gear set;

[0007] A transmission belt is connected between the driving pulley and the driven pulley.

[0008] The utility model also has the following optional features.

[0009] Optionally, the reduction gear set is a planetary gear set, comprising:

[0010] A planet carrier, wherein the driving pulley is arranged at one end of the planet carrier, and a plurality of planetary gears are rotatably arranged at the other end of the planet carrier;

[0011] An inner gear ring, the inner gear ring is arranged in the driving box, and the inner gear ring is meshed with the plurality of planetary gears;

[0012] A driving gear is meshed between the plurality of planetary gears and is connected to a main shaft of the driving motor.

[0013] Optionally, a plurality of plug posts are provided on the side wall of the driven pulley, and a plurality of plug holes are provided on the hub of the driving wheel, and the plug posts are inserted into the plug holes.

[0014] Optionally, the driving box includes a box body and a box cover, and the driven pulley, the driving pulley and the reduction gear set are all arranged in the box body.

[0015] Optionally, the ring gear is arranged on the inner side of the box body, and the drive motor is arranged on the outer side of the box body.

[0016] The wheel drive mechanism of the cart of the utility model is provided with a driving pulley, a driven pulley and a transmission belt in a driving box, and a reduction gear set is provided between the driving pulley and the driving motor. The reduction gear set reduces speed between the driving motor and the driving pulley, and then reduces speed between the driving pulley and the driven pulley through the transmission belt, thereby effectively reducing the reduction ratio between the driving pulley and the driven pulley and reducing the radius of the driven pulley, thereby reducing the radial dimension of the housing of the driving mechanism at the wheel axle and ensuring the chassis height of the cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the external structure of the wheel driving mechanism of the cart of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the wheel driving mechanism of the cart of the utility model;

[0019] Figure 3 yes Figure 1 A schematic diagram of the assembly structure of the wheel drive mechanism of the cart inside the box body;

[0020] Figure 4 yes Figure 1 Schematic diagram of the assembly structure inside the box cover of the cart wheel drive mechanism.

[0021] In the figure: 1, driving box; 101, driving box; 102, box cover; 103, inner gear ring; 2, driven pulley;

[0022] 201, plug column; 3, driving wheel; 301, wheel hub; 302, socket; 4, driving motor; 5, reduction gear set; 501, planetary carrier; 502, planetary gear; 503, driving gear; 6, driving pulley; 7, transmission belt; 8, axle.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0024] Example 1

[0025] refer to Figure 1 and Figure 2The embodiment of the utility model proposes a cart wheel driving mechanism, comprising: a driving box 1, a driven pulley 2, a driving motor 4 and a transmission belt 7; a wheel shaft 8 is rotatably arranged in the driving box 1, and a driving wheel 3 is arranged at one end of the wheel shaft 8; the driven pulley 2 is arranged on the inner side of the driving box 1, and the driven pulley 2 is connected to the driving wheel 3; the driving motor 4 is arranged on the driving box 1, and a reduction gear set 5 is connected to the main shaft of the driving motor 4, and a driving pulley 6 is arranged at the output end of the reduction gear set 5; the transmission belt 7 is connected between the driving pulley 6 and the driven pulley 2.

[0026] One end of the axle 8 is connected to the driving wheel 3, and the other end is inserted into the driving box 1 and rotates with the driven pulley 2 through the bearing. The driving pulley 6 is integrated at the output end of the reduction gear set 5, and the main shaft of the driving motor 4 is connected to the input end of the reduction gear set 5. The main shaft speed of the driving motor 4 is reduced by the reduction gear set 5, and then output to the driving wheel 3 after being reduced by the transmission belt 7 and the driven pulley 2. Since the speed of the driving pulley 6 has been reduced by the reduction gear set 5, the reduction ratio between the driving pulley 6 and the driven pulley 2 can be reduced, so that the diameter of the driven pulley 2 is reduced, and the radial dimension of the driving box 1 at the axle 8 is also reduced, thereby increasing the chassis height of the cart at the driving wheel, making the appearance of the cart more simple and beautiful.

[0027] Example 2

[0028] refer to Figure 2 and Figure 3 On the basis of Example 1, the reduction gear set 5 is a planetary gear set, including: a planet carrier 501, an inner ring gear 103 and a driving gear 503; the driving pulley 6 is arranged at one end of the planet carrier 501, and the other end of the planet carrier 501 is rotatably provided with multiple planetary gears 502; the inner ring gear 103 is arranged in the driving box 1, and the inner ring gear 103 is meshed with multiple planetary gears 502; the driving gear 503 is meshed between the multiple planetary gears 502, and the driving gear 503 is connected to the main shaft of the driving motor 4.

[0029] The driving pulley 6 and the planet carrier 501 are a fixed connection structure, or an integral injection molding structure. Three short shafts are set at both ends of the planet carrier 501, and the three planetary gears 502 are respectively rotatably set on the three short shafts; the inner ring gear 103 is fixed to the inner side of the box body 101 of the driving box 1, or it can be integrally injection molded with the box body 101 of the driving box 1. The driving gear 503 is located between the three planetary gears 502 and meshes with them at the same time; the driving motor 4 drives the driving gear 503 to rotate through the main shaft, and the driving gear 503 drives the three planetary gears 502 to roll in the inner ring gear 103, thereby driving the planet carrier 501 and the driving pulley 6 to rotate.

[0030] Example 3

[0031] refer to Figure 2 and Figure 3 On the basis of Example 2, a plurality of plug posts 201 are provided on the side wall of the driven pulley 2 , a plurality of sockets 302 are provided on the hub 301 of the driving wheel 3 , and the plug posts 201 are inserted into the sockets 302 .

[0032] The multiple pins 201 on the side wall of the driven pulley 2 pass through the drive box 1 and extend into the multiple sockets 302 on the hub 301 of the driving wheel 3, so that the driven pulley 2 can synchronously drive the driving wheel 3 to rotate. When the driving wheel 3 needs to be removed, the driving wheel 3 is pulled out from the drive box 1, and the multiple pins 201 are separated from the multiple sockets 302, making disassembly and assembly convenient.

[0033] Example 4

[0034] refer to Figure 1 and Figure 3 On the basis of any of the above embodiments, the driving box 1 includes a box body 101 and a box cover 102 , and the driven pulley 2 , the driving pulley 6 and the reduction gear set 5 are all arranged in the box body 101 .

[0035] The box cover 102 of the driving box 1 is located on the side facing the driving wheel 3. One end of the box body 101 and the box cover 102 of the driving box 1 is a large arc surface with the driven pulley 2 as the axis, and the other end is a small arc surface with the driving pulley 6 as the axis.

[0036] Example 5

[0037] refer to Figure 1 , Figure 2 and Figure 3 On the basis of Example 4, the inner gear ring 103 is arranged on the inner side of the box body 101 , and the driving motor 4 is arranged on the outer side of the box body 101 .

[0038] The inner gear ring 103 and the box body 101 are an integrated structure, three planetary gears 502 are meshed in the inner gear ring 103, and a driving gear 503 is meshed between the three planetary gears 502. The driving motor 4 is installed on the outside of the box body 101, and its main shaft passes through the box body 101 and is connected to the driving gear 503.

[0039] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. A cart wheel drive mechanism, characterized in that: include: A driving box (1), wherein a wheel axle (8) is rotatably arranged inside the driving box (1), and a driving wheel (3) is arranged at one end of the wheel axle (8); A driven pulley (2), the driven pulley (2) being arranged on the inner side of the driving box (1), and the driven pulley (2) being connected to the driving wheel (3); A driving motor (4), wherein the driving motor (4) is arranged on the driving box (1), a reduction gear set (5) is connected to the main shaft of the driving motor (4), and a driving pulley (6) is arranged at the output end of the reduction gear set (5); A transmission belt (7), wherein the transmission belt (7) is connected between the driving pulley (6) and the driven pulley (2).

2. The wheel drive mechanism of the cart according to claim 1, characterized in that: The reduction gear set (5) is a planetary gear set, comprising: A planetary carrier (501), wherein the driving pulley (6) is arranged at one end of the planetary carrier (501), and a plurality of planetary gears (502) are rotatably arranged at the other end of the planetary carrier (501); An inner gear ring (103), the inner gear ring (103) being arranged in the driving box (1), and the inner gear ring (103) being meshed with the plurality of planetary gears (502); A driving gear (503), the driving gear (503) is meshed between the plurality of planetary gears (502), and the driving gear (503) is connected to the main shaft of the driving motor (4).

3. The wheel drive mechanism of the cart according to claim 1, characterized in that: A plurality of inserting posts (201) are arranged on the side wall of the driven pulley (2), a plurality of inserting holes (302) are arranged on the hub (301) of the driving wheel (3), and the inserting posts (201) are inserted into the inserting holes (302).

4. The wheel drive mechanism of the cart according to claim 2, characterized in that: The driving box (1) comprises a box body (101) and a box cover (102); the driven pulley (2), the driving pulley (6) and the reduction gear set (5) are all arranged in the box body (101).

5. The wheel drive mechanism of the cart according to claim 4, characterized in that: The inner gear ring (103) is arranged on the inner side of the box body (101), and the drive motor (4) is arranged on the outer side of the box body (101).

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