A driving device and an electric cart containing the driving device

Abstract

A driving device and an electric cart containing the driving device relate to the field of driving devices, and include a motor, a motor flange, a support plate, a gear plate, a gear shaft, an internal gear bowl, a wheel shaft, a wheel hub, a wheel, a steering shaft and a steering seat. Steering is achieved through the steering shaft and the steering seat. The torque output by the motor is decelerated by the gear plate, the gear shaft and the internal gear bowl to obtain a large reduction ratio, thereby obtaining a large torque. The wheels are installed on one side of the support plate, and maintenance only requires disassembly of the wheels. Disassembly and assembly are convenient, maintenance cost is low, and promotion is convenient.

Description

Technical Field

[0001] The present invention relates to a driving device, in particular to a driving device and an electric cart containing the driving device. Background Art

[0002] At present, wheelbarrows are mostly used to transport concrete, earth, sand and gravel and other construction materials over short distances. However, the manpower is limited when using wheelbarrows, which results in a small amount of single transportation. The small amount of single transportation requires multiple round trips to complete the project, which prolongs the construction period and wastes time and manpower.

[0003] Electric carts can solve the problem of limited manpower for hand carts and shorten construction period to a certain extent, but they are limited by construction space. For example, electric carts used in secondary structure construction of buildings need to meet the characteristics of small size, large capacity, high power, low speed, and flexibility and safety.

[0004] The existing rear axle drive device is large in size and is limited by cost and size. The steering wheel and the drive are separated, the steering angle is small, and the device is not flexible.

[0005] The existing hub motor is a motor built into the wheel hub to directly drive the wheel. It is divided into outer rotor hub motor and inner rotor hub motor. Although both can be used for steering wheels, they are subject to the following restrictions: 1. The output torque is not enough. The outer rotor hub motor is a motor that directly drives the wheel hub, and the output torque is small. The electric cart is a construction vehicle with a certain carrying capacity and requires a larger torque drive. However, due to volume limitations, the inner rotor hub motor is a single-stage planetary reduction motor, which cannot obtain a large speed ratio and torque, and has a high cost, so it is not suitable for promotion in electric carts; 2. Disassembly is inconvenient. Replacing the wheel during construction requires rewiring, and replacing the wheel requires replacing the motor at the same time, which is costly and not suitable for widespread use in electric carts.

[0006] This application is specially proposed to address the defects of the prior art. Summary of the invention

[0007] The present invention provides a driving device and an electric cart comprising the driving device, which can be electrically driven, can output large torque, has a large steering angle, is easy to disassemble, has low maintenance cost and is suitable for the promotion of electric carts.

[0008] The first aspect of the present invention proposes a driving device, including a motor, a motor flange, a support plate, a gear sheet, a gear shaft, an inner gear bowl, a wheel shaft, a wheel hub and a wheel, wherein the motor contains a motor gear shaft, the motor flange is connected to the motor stop, the motor flange is connected to the stop of one end face of the support plate by bolts, a gear chamber is arranged on one end face of the support plate, the gear chamber is a concave cavity on one end face of the support plate, a gear sheet is arranged in the gear chamber, a through hole is arranged in the center of the gear chamber, the motor gear shaft is meshed with the gear sheet, the gear sheet is key-connected with the gear shaft, one end of the gear shaft is mounted on the motor flange by a bearing, the other end of the gear shaft is provided with teeth, the teeth pass through the through hole in the gear chamber and mesh with the inner teeth on the inner gear bowl, the inner gear bowl is connected to the stop of the wheel hub, the inner gear bowl, the wheel hub and the wheel are mounted together by screws, the wheel hub is mounted on the bearing platform of the wheel shaft by a bearing, one end of the wheel shaft is rigidly connected to the support plate, the other end of the wheel shaft can be provided with a threaded mounting nut, can also be provided with a groove mounting card, and the wheel hub can also be fixed by other existing technologies.

[0009] Preferably, there is a dustproof ring on the other end face of the support plate. The dustproof ring is tubular and has a perfect circular cross-section. The center of the circle is on the same axis as the center of the circle where the bearing platform on the wheel axle is located. There is a groove on the outer circle of the inner gear bowl, and a seal is provided in the groove. The seal and the dustproof ring are gap-matched.

[0010] Preferably, a dust bowl is provided outside the inner gear bowl, the dust bowl is outside the inner gear bowl, the inner gear bowl is installed on the wheel hub, the dust bowl is sleeved outside the dust ring, and the gap with the dust ring is matched. The inner gear bowl and the dust bowl are preferably assembled together, and can also be rigidly connected together using existing technology.

[0011] Preferably, the outer circle of the inner gear bowl is provided with a stop step 1, the inner hole of the dust bowl is provided with a stop step 2, and the stop step 2 on the dust bowl is installed on the stop step 1 on the outer circle of the inner gear bowl.

[0012] Preferably, a bearing seat is provided on the support plate, one end of the bearing seat is rigidly connected to the support plate, and the other end is provided with a bearing chamber, and the gear shaft is installed in the bearing chamber through a bearing.

[0013] Preferably, the driving device also includes a steering shaft and a steering seat, the steering shaft is connected to the electric cart frame through a bearing, the lower end of the steering shaft is rigidly connected to one end face of the steering seat, and the other end face of the steering seat is rigidly connected to the upper end of the support plate, and the bearing connecting the steering shaft and the electric cart frame can be any mechanical part that can achieve support and reduce the friction coefficient through existing technology.

[0014] Preferably, the outer circle of the steering seat is provided with a rope pulley groove, a steel wire rope is wound in the rope pulley groove and one point of the steel wire rope or both ends of the steel wire rope are fixed to the steering seat, and the steering seat is connected to the steering control mechanism through the steel wire rope, and the steering angle is large.

[0015] Preferably, reinforcing ribs are rigidly connected to the outside of both sides of the support plate, and the reinforcing ribs are also rigidly connected to the steering seat. The driving device supports and connects the wheel axle and the steering seat through the support plate, and the wheel is installed on one side of the support plate for easy disassembly and assembly.

[0016] Another aspect of the present invention provides an electric cart comprising a driving device, wherein the driving device is the driving device described in this application.

[0017] The beneficial effects of the present invention are that steering is achieved through a steering shaft and a steering seat, the steering angle is large, and a large reduction ratio is obtained through the torque output by the motor through the deceleration of the gear plate, the gear shaft and the internal gear bowl, thereby obtaining a large torque. The wheels are installed on one side of the support plate, and maintenance only requires disassembly of the wheels. Disassembly and assembly are convenient, maintenance costs are low, and it is convenient for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the driving device of the present invention.

[0019] Figure 2 It is a cross-sectional view of some parts of the driving device of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the support frame of the driving device of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of an electric cart including the driving device of the present invention.

[0022] In the figure: 1 motor, 101 motor gear shaft, 2 motor flange, 3 support plate, 301 bearing seat, 302 bearing chamber, 303 dust ring, 304 reinforcing rib, 4 gear plate, 5 gear shaft, 6 inner gear bowl, 601 seal, 602 dust bowl, 7 wheel shaft, 8 wheel hub, 9 wheel, 10 steering shaft, 11 steering seat.

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings, and the "upper" and "lower" mentioned herein are all with reference to the accompanying drawings.

[0025] like Figure 1 , Figure 2 and Figure 3As shown, on one hand, the present invention proposes a driving device, including a motor 1, a motor flange 2, a support plate 3, a gear piece 4, a gear shaft 5, an inner gear bowl 6, a wheel shaft 7, a wheel hub 8 and a wheel 9, wherein the motor 1 contains a motor gear shaft 101, the motor flange 2 is connected to the stopper of the motor 1, the motor flange 2 is connected to the stopper of one end face of the support plate 3 by bolts, a gear chamber is provided on one end face of the support plate 3, the gear chamber is a concave cavity on one end face of the support plate 3, a gear piece 4 is provided in the gear chamber, a through hole is provided in the center of the gear chamber, the motor gear shaft 101 is meshed with the gear piece 4, The gear sheet 4 is key-connected with the gear shaft 5. One end of the gear shaft 5 is mounted on the motor flange 2 through a bearing. The other end of the gear shaft 5 has teeth, which pass through the through hole in the gear chamber and mesh with the internal teeth on the inner gear bowl 6. The inner gear bowl 6 is connected to the stopper of the wheel hub 8. The inner gear bowl 6, the wheel hub 8 and the wheel 9 are mounted together by screws. The wheel hub 8 is mounted on the bearing platform of the wheel shaft 7 through a bearing. One end of the wheel shaft 7 is rigidly connected to the support plate 3. The other end of the wheel shaft 7 can be provided with a threaded mounting nut, or a groove mounting card, and the wheel hub 8 can also be fixed by other existing technologies.

[0026] like Figure 2 and Figure 3 As shown, the other end surface of the support plate 3 also has a dust ring 303, the dust ring 303 is tubular, a cross section is a perfect circle, the center of the circle is on the same axis as the center of the circle where the bearing platform on the wheel shaft 7 is located, the outer circle of the inner gear bowl 6 is provided with a groove, the groove is provided with a seal 601, the seal 601 and the dust ring 303 are in clearance, the inner gear bowl 6 is provided with a dust bowl 602, the dust bowl 602 is outside the inner gear bowl 6, the inner gear bowl 6 is installed on the wheel hub 8, the dust bowl 602 is sleeved on the outside of the dust ring 303, and the dust bowl 602 is installed on the wheel hub 8. The dust ring 303 is clearance-matched, and the inner gear bowl 6 and the dust bowl 602 are preferably assembled together, and can also be rigidly connected together using existing technology. There is a stop step 1 on the outer circle of the inner gear bowl 6, and a stop step 2 on the inner hole of the dust bowl 602. The stop step 2 on the dust bowl 602 is installed on the stop step 1 on the outer circle of the inner gear bowl 6. A bearing seat 301 is provided on the support plate 3, one end of the bearing seat 301 is rigidly connected to the support plate 3, and a bearing chamber 302 is provided at the other end, and the gear shaft 5 is installed in the bearing chamber 302 through a bearing.

[0027] like Figure 1 and Figure 2As shown, the driving device also includes a steering shaft 10 and a steering seat 11. The steering shaft 10 is connected to the electric cart frame through a bearing. The lower end of the steering shaft 10 is rigidly connected to one end face of the steering seat 11, and the other end face of the steering seat 11 is rigidly connected to the upper end of the support plate 3. The bearing connecting the steering shaft 10 and the electric cart frame can be any mechanical part that can achieve support and reduce the friction coefficient through the existing technology. The outer circle of the steering seat 11 is provided with a pulley groove, and a steel wire rope is wound in the pulley groove and one point of the steel wire rope or both ends of the steel wire rope are fixed to the steering seat 11. The steering seat 11 is connected to the steering control mechanism through the steel wire rope. The two sides of the support plate 3 are also rigidly connected with reinforcing ribs 304, and the reinforcing ribs 304 are also rigidly connected to the steering seat 11. The driving device supports and connects the wheel shaft 7 and the steering seat 11 through the support plate 3, and the wheel 9 is installed on one side of the support plate 3 for easy disassembly and assembly.

[0028] As shown in all the accompanying drawings, another aspect of the present invention provides an electric cart comprising a driving device, wherein the driving device is the driving device described in the present application.

[0029] The present invention is implemented as follows. The drive device operates as follows: start the motor 1, the motor gear shaft 101 drives the gear plate 4, the gear plate 4 drives the gear shaft 5, the gear shaft 5 drives the inner gear bowl 6, the wheel 9 rotates with the inner gear bowl 6, and centrifugal force is generated by the dust bowl 602 on the inner gear bowl 6 and the rotation of the inner gear bowl 6. At the same time, the dust ring 303 and the seal 601 are used to seal the transmission structure. The drive device is installed as follows: the electric cart frame and the drive device are connected through the steering shaft 10, and the steering of the drive device and the electric cart is achieved by pulling the wire rope on the steering seat 11 through the steering control mechanism.

Claims

1. A driving device, comprising a motor (1), a motor flange (2), a support plate (3), a gear plate (4), a gear shaft (5), an inner gear cup (6), a wheel shaft (7), a wheel hub (8), a wheel (9), a steering shaft (10) and a steering seat (11), characterized in that: The motor (1) comprises a motor gear shaft (101), the motor flange (2) is connected to the stopper of the motor (1), the motor flange (2) is connected to the stopper of one end face of the support plate (3) by bolts, a gear chamber is provided on one end face of the support plate (3), the gear chamber is a concave cavity on one end face of the support plate (3), a gear sheet (4) is provided in the gear chamber, a through hole is provided in the center of the gear chamber, the motor gear shaft (101) is meshed with the gear sheet (4), the gear sheet (4) is key-connected with the gear shaft (5), one end of the gear shaft (5) is mounted on the motor flange (2) by a bearing, the other end of the gear shaft (5) is provided with teeth, the teeth pass through the through hole in the gear chamber and mesh with the internal teeth on the inner gear bowl (6), the inner gear bowl (6) is connected to the stopper of the wheel hub (8), the inner gear bowl (6), the wheel hub (8) and the wheel (9) are mounted together by screws, the wheel hub (8) is mounted on the bearing platform of the wheel shaft (7) by a bearing, and one end of the wheel shaft (7) is rigidly connected to the support plate (3); The other end surface of the support plate (3) is provided with a dustproof ring (303), which is tubular and has a perfect circular cross section. The center of the dustproof ring (303) is on the same axis as the center of the circle where the bearing platform on the wheel shaft (7) is located. The outer circle of the inner gear bowl (6) is provided with a groove, and a sealing member (601) is provided in the groove. The sealing member (601) and the dustproof ring (303) are clearance-matched. A dustproof bowl (602) is provided outside the inner gear bowl (6), the dustproof bowl (602) is outside the inner gear bowl (6), the inner gear bowl (6) is mounted on the wheel hub (8), and the dustproof bowl (602) is sleeved outside the dustproof ring (303) and is clearance-matched with the dustproof ring (303); The outer circle of the inner toothed bowl (6) is provided with a stop step 1, the inner hole of the dustproof bowl (602) is provided with a stop step 2, and the stop step 2 on the dustproof bowl (602) is mounted on the stop step 1 on the outer circle of the inner toothed bowl (6); A bearing seat (301) is provided on the support plate (3); one end of the bearing seat (301) is rigidly connected to the support plate (3), and the other end is provided with a bearing chamber (302); the gear shaft (5) is installed in the bearing chamber (302) via a bearing; The steering shaft (10) is connected to the electric cart frame through a bearing, the lower end of the steering shaft (10) is rigidly connected to one end surface of the steering seat (11), and the other end surface of the steering seat (11) is rigidly connected to the upper end of the support plate (3); Reinforcing ribs (304) are rigidly connected to the outside of both sides of the support plate (3), and the reinforcing ribs (304) are also rigidly connected to the steering seat (11). The driving device supports and connects the wheel shaft (7) and the steering seat (11) through the support plate (3), and the wheel (9) is installed on one side of the support plate (3).

2. An electric cart with a driving device, characterized in that: The driving device is the driving device according to claim 1.

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