Assistance structure of outdoor trolley

Abstract

The utility model discloses a power assisting structure of an outdoor trolley, and relates to the technical field of trolley structures, the power assisting structure comprises a hollow mounting seat, a driving motor is arranged on the outer side of the mounting seat, and a plurality of reduction gear sets connected with the driving end of the driving motor are rotationally arranged in the mounting seat; a mounting shaft fixedly connected with the side wall of the mounting base is rotationally arranged on the portion, away from the driving motor, of the reduction gear set, and a driving wheel body is rotationally arranged on the portion, located on the outer side of the mounting base, of the mounting shaft and comprises two wheel shells which are rotationally connected with the two ends of the mounting shaft and clamped with each other; the wheel shell is provided with a connecting clamping base in the direction facing the mounting base along the mounting shaft, the mounting base is provided with a clamping disc connected with the connecting clamping base in an inserted mode, and the clamping disc is rotationally arranged in the axial direction of the center of the mounting shaft and corresponds to the reduction gear set. The driving motor enables the clamping disc to rotate through the reduction gear set, the driving wheel body is driven to rotate on the ground, assistance is provided for advancing of the trolley, and the climbing capacity and the complex road surface passing capacity of the trolley are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stroller structure, in particular to the power assisting structure of outdoor stroller. BACKGROUND

[0002] The stroller is a carrying vehicle that is pushed and pulled by manpower. The stroller has single-wheel, two-wheel, three-wheel and four-wheel types. The traditional stroller has a wooden body, and the modern stroller has a metal or alloy frame.

[0003] The existing stroller is mainly pushed by manpower. When the outdoor goods need to be carried to the designated position, the goods to be carried are usually loaded on the stroller, and then the stroller is manually pushed to move the goods to the unloading position.

[0004] According to the related technology in the above, the inventor believes that when the outdoor stroller encounters complex road surfaces, it is inconvenient to manually push the stroller to move through the complex road surfaces. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a power assisting structure of outdoor stroller to improve the problem that when the outdoor stroller encounters complex road surfaces, it is inconvenient to manually push the stroller to move through the complex road surfaces.

[0006] The power assisting structure of outdoor stroller provided by the present application adopts the following technical scheme:

[0007] The power assisting structure of outdoor stroller comprises a hollow mounting seat, a driving motor is arranged outside the mounting seat, a plurality of reduction gear sets connected with the driving end of the driving motor are rotatably arranged in the mounting seat, the part of the reduction gear sets away from the driving motor is rotatably arranged with a mounting shaft fixedly connected with the side wall of the mounting seat, the mounting shaft is rotatably arranged with a driving wheel body outside the mounting seat, the driving wheel body comprises two wheel housings rotatably connected with the two ends of the mounting shaft and engaged with each other, the wheel housings are provided with connecting clamping seats in the direction of the mounting seat along the mounting shaft, the side of the mounting seat facing the connecting clamping seats is provided with a clamping disc inserted with the connecting clamping seats, and the clamping disc is rotatably arranged along the central axis of the mounting shaft and corresponds to the reduction gear sets.

[0008] By adopting the above technical scheme, the clamping disc is rotatably connected with the bearing along the central axis of the mounting shaft and corresponds to the reduction gear sets. The reduction gear sets transmit the rotation speed and torque output by the driving motor to the clamping disc, so that the clamping disc and the connecting clamping seat are rotated together, the driving wheel body is driven to rotate to assist the movement of the stroller, and the climbing and complex road surface passing capacity of the stroller are improved.

[0009] Optionally, the clamping disc is provided with a planetary reduction mechanism communicated with the mounting seat on the side away from the connecting seat, the planetary reduction mechanism is arranged along the central axis of the mounting shaft, the planetary reduction mechanism comprises a fixed cavity connected with the mounting seat, an inner tooth ring is arranged on the inner side wall of the fixed cavity, the mounting shaft is rotatably arranged in the fixed cavity and provided with a planetary reduction frame, a plurality of planetary gears meshing with the inner tooth ring are rotatably arranged around the mounting shaft on the side of the planetary reduction frame facing the reduction gear set, and the planetary gears are meshed with part of the reduction gear set mounting seat.

[0010] By adopting the above technical scheme, the planetary reduction mechanism shares the load through the plurality of planetary gears, transmits the torque to the inner tooth ring and the planetary reduction frame, can bear greater load compared with a single gear pair, transmits more stably, wears more evenly, and improves the system carrying capacity and durability; the axially arranged planetary reduction frame is linked with the reduction gear set, shortens the power transmission path, and reduces energy loss.

[0011] Optionally, a connecting groove is formed on the side of the planetary reduction frame facing the clamping disc, a fixed disc rotatably connected with the mounting shaft and connected with the clamping disc is arranged between the connecting grooves on the inner side wall of the connecting groove, and the connecting groove inner side wall and the part of the fixed disc inserted into the connecting groove are triangularly arranged.

[0012] By adopting the above technical scheme, the connecting groove inner side wall and the part of the fixed disc inserted into the connecting groove are triangularly arranged, which effectively prevents relative rotation between the planetary reduction frame and the fixed disc, ensures reliable transmission of the torque from the planetary reduction frame to the fixed disc, and then to the clamping disc and the driving wheel body, drives the driving wheel body to rotate, and assists the movement of the trolley.

[0013] Optionally, an installation groove is formed on the position of the clamping disc facing the fixed disc, a triangular disc is arranged on the side of the fixed disc facing the installation groove, a groove corresponding to the triangular disc is formed on the inner side wall of the installation groove, and a magnetic member corresponding to the groove is arranged between the side wall of the triangular disc and the inner side wall of the installation groove.

[0014] By adopting the above technical scheme, when the triangular disc rotates with the fixed disc, the magnetic member is pushed to the groove along the side wall of the triangular disc under the action of centrifugal force, so that the magnetic member is clamped between the groove and the triangular disc, and then drives the clamping disc to rotate, so that the driving wheel body starts to rotate; when the motor stops rotating, the trolley continues to move under the action of human power, the driving wheel body rotates to drive the clamping disc to rotate, so that the recess in the clamping disc drives the magnetic member to move to the position with the maximum distance between the side wall of the triangular disc and the inner side wall of the circular installation groove, and the driving wheel body rotates independently, forming a clutch structure.

[0015] Optionally, the triangular disc is provided with a fixed plate fixedly connected with the mounting shaft and attracted to the magnetic member on the side close to the clamping disc, the circumferential side wall of the fixed plate is matched with the inner side wall of the mounting groove, and the outer side of the triangular disc is embedded with a sleeve frame, the edge position of the sleeve frame is matched with the inner side wall of the mounting groove and is attracted to the magnetic member.

[0016] By adopting the above technical scheme, the fixed plate is attracted to the magnetic member, the magnetic member is limited between the fixed plate and the fixed disc, the magnetic member is prevented from being dislocated in the axial direction of the mounting shaft, the edge position of the sleeve frame is matched with the inner side wall of the mounting groove and is attracted to the magnetic member, and the magnetic member can be smoothly moved to the recess along the sleeve frame side wall under the action of the centrifugal force generated by the rotation of the fixed disc.

[0017] Optionally, the mounting shaft is provided with threads at both ends outside the driving wheel body, and the driving motor is arranged on the side of the mounting seat facing the clamping disc.

[0018] By adopting the above technical scheme, the threads at both ends of the mounting shaft can be quickly connected with the frame of the trolley through nuts, the mounting shaft is fixed, and the driving wheel body is quickly installed; the driving motor is arranged on the side of the mounting seat facing the clamping disc, so that the overall structure is smaller in size, and the wheel shell is convenient to install to form the driving wheel body.

[0019] Optionally, the side of the mounting seat away from the clamping disc is provided with a clamping block corresponding to the mounting shaft, a planar groove corresponding to the clamping block is formed in the side wall of the mounting shaft, a limiting block is arranged on the clamping block at the position facing the planar groove, and a fixed groove matched with the clamping block is formed in the side wall of the mounting seat.

[0020] By adopting the above technical scheme, the limiting block of the clamping block is matched with the planar groove to fix the mounting shaft and prevent the mounting shaft from rotating in the mounting seat; the clamping block is embedded in the fixed groove to constrain the clamping block, so that the clamping block itself is firm and does not loosen, and the positioning and limiting effect of the clamping block on the mounting shaft is durable and reliable.

[0021] Optionally, the mounting shaft is hollow in the axial direction thereof, a waist-shaped groove in communication with the hollow portion is formed in the outer side of the mounting shaft, and the connecting lead of the driving motor is arranged to pass through the waist-shaped groove and be in communication with the outside of the driving wheel.

[0022] By adopting the above technical scheme, the connecting lead between the driving motor and the power supply is communicated with the outside of the driving wheel through the waist-shaped groove, so that the lead of the driving motor can pass through the inside of the fixed mounting shaft, the risk of exposure and abrasion of the lead is avoided, and the safety is improved.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The snap-fit ​​plate is rotatably connected to the center axis of the mounting shaft via a bearing and corresponds to the reduction gear set. The reduction gear set transmits the speed and torque output by the drive motor to the snap-fit ​​plate, causing the snap-fit ​​plate and connecting bracket to rotate together, which drives the drive wheel to rotate and assists the trolley to move, improving the trolley's ability to climb slopes and pass through complex road surfaces.

[0025] 2. When the triangular disk rotates with the fixed disk, the magnetic component is pushed along the side wall of the triangular disk into the groove under the action of centrifugal force, and is stuck between the groove and the triangular disk, driving the locking plate to rotate, which in turn drives the drive wheel to rotate and assists the trolley to move; when the motor stops, the trolley continues to move under manual force, which drives the drive wheel to rotate and drives the locking plate to rotate, so that the groove in the locking plate drives the magnetic component to the position with the largest distance between the side wall of the triangular disk and the inner side wall of the circular mounting groove, so that the drive wheel rotates independently, forming a clutch structure;

[0026] 3. The limiting block of the locking block fits into the flat groove to fix the mounting shaft and prevent it from rotating in the mounting seat; the locking block is embedded in the fixing groove to constrain the locking block and ensure that the locking block itself is firm and does not loosen, thus ensuring its long-lasting and reliable positioning and limiting effect on the mounting shaft. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall assist structure of an outdoor stroller;

[0028] Figure 2 This is a partial sectional view of the power assist structure of an outdoor trolley;

[0029] Figure 3 It is an exploded view of the auxiliary structure along the axial direction of the mounting axis;

[0030] Figure 4 This is a cross-sectional view of the triangular disk section inside the card slot.

[0031] Figure 5 This is an overall sectional view of the auxiliary structure.

[0032] In the diagram, 1. Mounting base; 11. Reduction gear set; 12. Locking block; 121. Limiting block; 13. Fixing groove; 2. Drive motor; 3. Mounting shaft; 31. Flat groove; 32. Waist-shaped groove; 4. Drive wheel body; 41. Wheel housing; 411. Connecting card seat; 5. Locking plate; 51. Mounting groove; 52. Groove; 6. Planetary reduction mechanism; 61. Fixing cavity; 611. Internal gear ring; 62. Planetary reduction frame; 621. Connecting groove; 63. Planetary gear; 7. Fixing plate; 71. Triangular disk; 711. Sleeve; 72. Magnetic component; 73. Fixing plate. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 -AppendixFigure 5 The application is further described in detail.

[0034] The power assisting structure of the outdoor stroller refers to Figure 1 and Figure 2 , comprising a hollow mounting seat 1, a driving motor 2 connected with the power supply is fixed outside the mounting seat 1 by bolts, a plurality of reduction gear sets 11 are rotationally connected in the mounting seat 1 through bearings and rotating shafts, the reduction gear sets 11 are composed of a plurality of double gear sets and are engaged with the gear connected with the driving end of the driving motor 2, the part of the reduction gear sets 11 away from the driving motor 2 is rotationally connected with a mounting shaft 3 through bearings, the mounting shaft 3 is fixedly connected with the side wall of the mounting seat 1 through holes, a driving wheel body 4 is rotationally arranged on the mounting shaft 3 outside the mounting seat 1, the driving wheel body 4 comprises two wheel housings 41 rotationally connected with the two ends of the mounting shaft 3 through bearings and engaged with each other, so that the driving wheel body 4 is connected with the frame (not shown in the figure) through the exuded mounting shaft 3; a plastic connecting clamping seat 411 integrally formed is arranged on the wheel housing 41 along the mounting shaft 3 towards the mounting seat 1, a plastic clamping disc 5 is arranged on the side of the mounting seat 1 towards the connecting clamping seat 411 and is inserted with the connecting clamping seat 411, the clamping disc 5 is rotationally connected with the reduction gear sets 11 along the central axis of the mounting shaft 3 and corresponds to the reduction gear sets 11, the rotation speed and torque output by the driving motor 2 are transmitted to the clamping disc 5 by the reduction gear sets 11, the rotation of the clamping disc 5 makes the connecting clamping seat 411 rotate with the driving wheel body 4, and the driving wheel body 4 moves on the complex road surface to provide power assistance for the forward movement of the stroller, adapt to the load demand of the outdoor stroller, and improve the climbing and complex road surface passing ability of the stroller.

[0035] Refer to Figure 2 and Figure 3 , a planetary reduction mechanism 6 is arranged on the side of the clamping disc 5 away from the connecting clamping seat 411 and is connected with the mounting seat 1, the planetary reduction mechanism 6 is arranged along the central axis of the mounting shaft 3, the planetary reduction mechanism 6 comprises a fixed cavity 61 integrally formed with the mounting seat 1, an inner ring gear 611 integrally formed is arranged on the inner side wall of the fixed cavity 61, a planetary reduction frame 62 is rotationally connected with the mounting shaft 3 in the fixed cavity 61 through bearings, a plurality of planetary gears 63 are rotationally connected with the planetary reduction frame 62 through rotating shafts on the side of the planetary reduction frame 62 towards the reduction gear sets 11, the planetary gears 63 are arranged around the mounting shaft 3 and are engaged with the inner ring gear 611, the planetary gears 63 are engaged with the part of the mounting seat 1 of the reduction gear sets 11, the planetary reduction mechanism 6 is engaged with the planetary gears 63 through the inner ring gear 611, the planetary reduction mechanism 63 shares the load through the plurality of planetary gears 63, and the torque is transmitted to the inner ring gear 611 and the planetary reduction frame 62, compared with a single gear pair, the planetary reduction mechanism 63 can bear greater load, the transmission is more stable, the wear is more uniform, and the system carrying capacity and durability are improved; the axially arranged planetary reduction frame 62 is linked with the reduction gear sets 11, the power transmission path is shortened, and the energy loss is reduced.

[0036] Referring to Figure 3 and Figure 5 A connecting groove 621 is formed on the side of the planetary reduction gear 62 facing the clamping disc 5, and a fixed disc 7 is arranged between the inner wall of the connecting groove 621 and the clamping disc 5 and rotatably connected to the mounting shaft 3 through a bearing. The side of the fixed disc 7 facing the clamping disc 5 is connected to the clamping disc 5. The inner wall of the connecting groove 621 is in close contact with the part of the fixed disc 7 inserted into the connecting groove 621 and is arranged in a triangular shape, effectively preventing relative rotation between the planetary reduction gear 62 and the fixed disc 7 and ensuring reliable transmission of torque from the planetary reduction gear 62 to the fixed disc 7, and then to the clamping disc 5 and the drive wheel body 4.

[0037] Referring to Figure 3 , Figure 4 and Figure 5 An installation groove 51 is formed on the side of the clamping disc 5 facing the fixed disc 7, and a triangular disc 71 is integrally formed on the side of the fixed disc 7 facing the installation groove 51. A recess 52 corresponding to the triangular disc 71 is formed on the inner wall of the installation groove 51. A magnetic member 72 corresponding to the recess 52 is arranged between the side wall of the triangular disc 71 and the inner wall of the installation groove 51. The magnetic member 72 is a cylindrical magnetic permanent magnet with moderate magnetic force, which is adsorbed on the side wall of the triangular disc 71. A metal fixing plate 73 is fixed to the side of the triangular disc 71 close to the clamping disc 5 through a pin shaft. The fixing plate 73 is adsorbed to the magnetic member 72. The circumferential side wall of the fixing plate 73 is in close contact with the inner wall of the installation groove 51, which limits the magnetic member 72 between the fixing plate 73 and the fixed disc 7. A metal sleeve frame 711 is embedded on the outside of the triangular disc 71. The edge position of the sleeve frame 711 is in close contact with the inner wall of the installation groove 51 and is adsorbed to the magnetic member 72, so that the magnetic member 72 with moderate magnetic force can move along the side wall of the sleeve frame 711 to clamp the recess 52 when the fixed disc 7 rotates. When the fixed disc 7 drives the triangular disc 71 to rotate, the magnetic member 72 is pushed along the side wall of the triangular disc 71 to the recess 52 under the action of centrifugal force, so that the magnetic member 72 is clamped between the recess 52 and the triangular disc 71, and then drives the clamping disc 5 to rotate, so that the drive wheel body 4 starts to rotate. When the motor stops rotating, the trolley is manually pushed to move, so that the drive wheel body 4 continues to rotate to drive the clamping disc 5 to rotate, so that the recess 52 drives the magnetic member 72 to move to the position with the maximum distance between the side wall of the triangular disc 71 and the circular inner wall of the installation groove 51, so that the drive wheel body 4 rotates independently, forming a clutch structure.

[0038] Referring to Figure 1 and Figure 2, the mounting shaft 3 is provided with threads at both ends outside the drive wheel body 4, the threads at both ends of the mounting shaft 3 can be quickly connected with the frame of the trolley through nuts to fix the mounting shaft 3 and quickly install the drive wheel body 4; the drive motor 2 is arranged on the side of the mounting seat 1 facing the clamping disc 5, so that the overall structure is smaller in size and the wheel shell 41 is convenient to install to form the drive wheel body 4; the clamping block 12 corresponding to the mounting shaft 3 is arranged on the side of the mounting seat 1 away from the clamping disc 5, the flat groove 31 corresponding to the clamping block 12 is formed in the side wall of the mounting shaft 3, and the limiting block 121 integrally formed with the clamping block 12 is arranged at the position extending towards the flat groove 31, so that the limiting block 121 of the clamping block 12 is attached to the flat groove 31 to fix the mounting shaft 3 and prevent the mounting shaft 3 from rotating in the mounting seat 1; the fixing groove 13 attached to the clamping block 12 is formed in the side wall of the mounting seat 1, the clamping block 12 is embedded in the fixing groove 13 to constrain the clamping block 12, so that the clamping block 12 itself is firm and does not loosen, and the positioning and limiting effects of the clamping block 12 on the mounting shaft 3 are persistent and reliable.

[0039] With reference to Figure 2 and Figure 5 , the mounting shaft 3 is hollow along the axial direction, and the waist-shaped groove 32 communicating with the hollow part is formed in the position of the mounting shaft 3 outside the mounting seat 1, the connecting wire (not shown in the figure) between the drive motor 2 and the power supply is communicated with the outside of the drive wheel through the waist-shaped groove 32, so that the wire of the drive motor 2 can pass through the inside of the mounting shaft 3 fixed relative to the frame of the trolley, the risk of wire exposure, wear and entanglement is avoided, and the safety is improved.

[0040] The implementation principle of the embodiment of the application is:

[0041] In actual operation, when the small trolley is manually pushed to move on a smooth ground, the drive wheel body 4 is rotated to drive the clamping disc 5 to rotate, so that the recess in the mounting groove 51 of the clamping disc 5 drives the magnetic part 72 to move to the position where the distance between the side wall of the triangular disc 71 and the inner wall of the circular mounting groove 51 is the largest, so that the drive wheel body 4 independently rotates on the smooth ground; when the small trolley is manually pushed to pass through a complex ground, the drive motor 2 drives the reduction gear set 11 in the mounting seat 1 to rotate, and then the planetary reduction mechanism 63 coaxially arranged with the mounting shaft 3 shares the load through a plurality of planetary gears 63, and then drives the fixed disc 7 to rotate; when the fixed disc 7 drives the triangular disc 71 to rotate, the magnetic part 72 is pushed to the recess 52 along the side wall of the triangular disc 71 under the action of centrifugal force, so that the magnetic part 72 is clamped between the recess 52 and the triangular disc 71, and then drives the clamping disc 5 to rotate, so that the drive wheel body 4 starts to rotate, assists the movement of the small trolley on the complex ground, and improves the climbing and complex road passing ability of the small trolley.

[0042] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. The assist structure of an outdoor stroller, characterized in that: The device includes a hollow mounting base (1), a drive motor (2) is provided on the outside of the mounting base (1), and a plurality of reduction gear sets (11) connected to the drive end of the drive motor (2) are rotatably provided in the mounting base (1). The portion of the reduction gear set (11) located away from the drive motor (2) is rotatably provided with a mounting shaft (3) fixedly connected to the side wall of the mounting base (1). The mounting shaft (3) is rotatably provided with a drive wheel body (4) on the outside of the mounting base (1). The drive wheel body (4) includes two wheel housings (41) that are rotatably connected to both ends of the mounting shaft (3) and engage with each other. The wheel housing (41) is provided with a connecting bracket (411) along the direction of the mounting shaft (3) toward the mounting base (1). The mounting base (1) is provided with a snap-fit ​​plate (5) that is inserted into the connecting bracket (411) on the side facing the connecting bracket (411). The snap-fit ​​plate (5) is rotatably provided along the central axial direction of the mounting shaft (3) and corresponds to the reduction gear set (11).

2. The assist structure of the outdoor trolley according to claim 1, characterized in that: The card plate (5) is provided with a planetary reduction mechanism (6) connected to the mounting base (1) on the side away from the connecting card seat (411). The planetary reduction mechanism (6) is arranged along the central axis of the mounting shaft (3). The planetary reduction mechanism (6) includes a fixed cavity (61) connected to the mounting base (1). An internal gear ring (611) is provided on the inner side wall of the fixed cavity (61). The mounting shaft (3) is rotatably arranged with a planetary reducer (62) in the fixed cavity (61). The planetary reducer (62) is rotatably arranged around the mounting shaft (3) on the side facing the reduction gear set (11) with several planetary gears (63) that mesh with the internal gear ring (611). The planetary gears (63) mesh with a portion of the mounting base (1) of the reduction gear set (11).

3. The assist structure of the outdoor trolley according to claim 2, characterized in that: The planetary gear reducer (62) has a connecting groove (621) on the side facing the retaining plate (5). A fixed plate (7) is provided between the retaining plate (5) on the inner side wall of the connecting groove (621) and the retaining plate (5). The inner side wall of the connecting groove (621) and the part of the fixed plate (7) inserted into the connecting groove (621) are in a triangular arrangement.

4. The assist structure of the outdoor trolley according to claim 3, characterized in that: The card plate (5) has an installation groove (51) facing the fixed plate (7). A triangular plate (71) is provided on the side of the fixed plate (7) facing the installation groove (51). A groove (52) corresponding to the triangular plate (71) is provided on the inner wall of the installation groove (51). A magnetic element (72) corresponding to the groove (52) is provided between the side wall of the triangular plate (71) and the inner wall of the installation groove (51).

5. The assist structure of the outdoor trolley according to claim 4, characterized in that: The triangular disk (71) is provided with a fixing plate (73) on the side near the receiving plate (5), which is fixedly connected to the mounting shaft (3) and attracted to the magnetic component (72). The circumferential sidewall of the fixing plate (73) is in contact with the inner sidewall of the mounting groove (51). The outer side of the triangular disk (71) is fitted with a sleeve (711). The edge of the sleeve (711) is in contact with the inner sidewall of the mounting groove (51) and attracted to the magnetic component (72).

6. The assist structure of the outdoor trolley according to claim 5, characterized in that: The mounting shaft (3) is threaded at both ends on the outside of the drive wheel body (4), and the drive motor (2) is located on the side of the mounting base (1) facing the snap-fit ​​plate (5).

7. The assist structure of the outdoor trolley according to claim 6, characterized in that: The mounting base (1) has a locking block (12) corresponding to the mounting shaft (3) on the side away from the locking plate (5). The mounting shaft (3) has a flat groove (31) corresponding to the locking block (12) on its side wall. The locking block (12) has a limiting block (121) extending towards the flat groove (31). The mounting base (1) has a fixing groove (13) that fits against the locking block (12) on its side wall.

8. The assist structure of the outdoor trolley according to claim 7, characterized in that: The mounting shaft (3) is hollow along its axial direction. The mounting shaft (3) is located on the outside of the mounting base (1) and has a waist-shaped groove (32) that communicates with the hollow part. The connecting wire of the drive motor (2) passes through the waist-shaped groove (32) and communicates with the outside of the drive wheel.

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