Rear axle structure of tricycle

Abstract

The utility model provides a rear axle structure of a tricycle, which relates to the technical field of tricycles and comprises an axle tube, a hub, a damping component and a connecting component. A gearbox is connected between the two axle tubes, transmission shafts are arranged in the axle tubes, brake discs are arranged on the hubs, and disc brake mechanisms matched with the brake discs are further arranged on the axle tubes. The damping assembly comprises a connecting column and a supporting column with the upper end connected with the frame. The connecting assembly comprises a supporting arm, a connecting pin and two connecting plates, the connecting plates are fixed to the axle tube, the distance between the two connecting plates is larger than the width of the supporting arm, through holes are formed in the connecting plates, mounting holes are correspondingly formed in the supporting arm, the connecting pin penetrates through the mounting holes, and the two ends of the connecting pin penetrate out of the through holes respectively and are in threaded connection with nuts. A rubber gasket is arranged on the connecting pin and located between the supporting arm and the connecting plate. The rear axle supporting arm solves the problems that a rear axle shakes violently in the driving process, the connecting position of the two ends of the supporting arm is prone to being subjected to large impact, and then the connecting position is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of tricycles, in particular to a rear axle structure of a tricycle. Background Art

[0002] Electric tricycle is one of the means of transportation. It can carry both cargo and passengers. It is widely used in my country. The tricycle has the characteristics of simple structure, mature technology, flexible and maneuverable, and easy to use. The existing electric tricycle uses a motor connected to a gearbox to drive the rear axle drive shaft to rotate. During the driving process, the vehicle will produce violent up and down vibrations and lateral shaking, which will directly affect the safety and comfort of the whole vehicle. Therefore, it is necessary to set a shock-absorbing structure between the rear axle and the frame. The patent with announcement number CN205574193U discloses a shock-absorbing bearing chassis for a three-wheeled motorcycle, including a frame and a rear axle, and the frame and the rear axle are connected by multiple spring shock absorbers. In addition, a pair of brackets are provided between the frame and the rear axle, and one end of the bracket extends horizontally and vertically to the front of the rear axle and is connected to the frame through a bracket support. However, since the rear axle will produce violent shaking during driving, it is easy to cause the connection at the end of the bracket to be subjected to a large impact, which in turn causes damage to the connection. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a rear axle structure for a tricycle, which solves the problem that the rear axle will shake violently during driving, which may easily cause the connection at the end of the support arm to be subjected to a greater impact, thereby causing damage to the connection.

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

[0005] A rear axle structure of a tricycle, comprising: an axle tube, a wheel hub, a shock absorbing assembly and a connecting assembly;

[0006] There are two bridge tubes, a gearbox is connected between the two bridge tubes, the two bridge tubes are coaxially arranged, a transmission shaft is arranged inside the bridge tube, one end of the transmission shaft is connected to the output shaft of the gearbox, and the other end is connected to the wheel hub, a brake disc is arranged on the wheel hub, and a disc brake mechanism cooperating with the brake disc is also arranged on the bridge tube;

[0007] The shock absorbing assembly comprises a connecting column and a support column connected to the vehicle frame at the upper end, one end of the connecting column is hinged to the bridge tube, and the lower end of the support column is elastically connected to the connecting column;

[0008] The connecting assembly includes a support arm, a connecting pin and two connecting plates, wherein the connecting plate is fixed on the bridge tube, the distance between the two connecting plates is greater than the width of the support arm, a through hole is provided on the connecting plate, one end of the support arm is connected to the frame, and the other end is correspondingly provided with a mounting hole, the connecting pin passes through the mounting hole, and the two ends of the connecting pin respectively pass through the through holes and are threadedly connected with nuts, and a rubber gasket is provided on the connecting pin and between the support arm and the connecting plate.

[0009] Preferably, a reinforcing rod connected to the vehicle frame is fixedly provided on one side of the support arm.

[0010] Preferably, a connecting block is provided between the reinforcing rod and the bracket arm.

[0011] Preferably, two connecting pins are provided on the same support arm, and the diameter of the mounting hole is larger than the diameter of the through hole.

[0012] Preferably, a hinge seat is fixedly provided on the bridge tube, and the connecting column is hinged on the hinge seat.

[0013] Preferably, a lower limit tube is provided at the lower end of the connecting column, an upper limit tube is provided at the upper end of the supporting column, and a spring is sleeved between the lower limit tube and the upper limit tube.

[0014] The utility model has the following beneficial effects:

[0015] One end of the support arm is connected to the frame, and the other end is connected between two connecting plates through a connecting pin. The distance between the two connecting plates is greater than the width of the support arm. When the rear axle shakes violently during driving, relative movement occurs between the support arm, the connecting plate and the bridge tube. Rubber gaskets are provided to provide buffering for the movement and avoid damage to the connection of the support arm.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the shock absorbing component of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the connection component of the utility model.

[0020] In the above drawings: 1. bridge tube; 11. hinge seat; 2. wheel hub; 3. shock absorber assembly; 31. connecting column; 311. lower limit tube; 32. support column; 321. upper limit tube; 4. connecting assembly; 41. support arm; 42. connecting pin; 43. connecting plate; 44. rubber gasket; 5. brake disc; 6. disc brake mechanism; 7. reinforcement rod; 71. connecting block; 8. spring. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the technical solutions in the present invention are further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figures 1 to 3 As shown, a rear axle structure of a tricycle comprises: a bridge tube 1, a wheel hub 2, a shock absorbing assembly 3 and a connecting assembly 4; the bridge tubes 1 are provided with two, a gearbox is connected between the two bridge tubes 1, the two bridge tubes 1 are coaxially arranged, a transmission shaft is arranged in the bridge tube 1, one end of the transmission shaft is connected to the output shaft of the gearbox, and the other end is connected to the wheel hub 2, a brake disc 5 is arranged on the wheel hub 2, and a disc brake mechanism 6 matched with the brake disc 5 is also arranged on the bridge tube 1; the shock absorbing assembly 3 comprises a connecting column 31 and a support column 32 connected to the frame at the upper end, one end of the connecting column 31 is hinged on the bridge On the tube 1, the lower end of the support column 32 is elastically connected to the connecting column 31; the connecting component 4 includes a support arm 41, a connecting pin 42 and two connecting plates 43, the connecting plate 43 is fixed on the bridge tube 1, the distance between the two connecting plates 43 is greater than the width of the support arm 41, a through hole is provided on the connecting plate 43, one end of the support arm 41 is connected to the frame, and the other end is correspondingly provided with a mounting hole, the connecting pin 42 passes through the mounting hole, and the two ends of the connecting pin 42 respectively pass through the through holes and are threaded with nuts, and a rubber gasket 44 is provided on the connecting pin 42 and between the support arm 41 and the connecting plate 43.

[0023] The gearbox can be connected to the motor, and the transmission shaft can drive the wheel hub 2 to rotate. The specific designs of the brake disc 5 and the disc brake mechanism 6 are all existing technologies and will not be elaborated here. The disc brake mechanism 6 is used to directly act on the brake disc 5 to brake, and the braking stability is good; a shock absorbing assembly 3 is provided for shock absorption. Specifically, two shock absorbing assemblies 3 are provided, and the two shock absorbing assemblies 3 are symmetrically arranged on the two bridge tubes 1 respectively. When the rear axle vibrates vertically, relative movement occurs between the support column 32 and the connecting column 31, and buffering is performed under the elastic connection; a support arm 41 is provided on each bridge tube 1, one end of the support arm 41 is connected to the frame, and the other end is connected between two connecting plates 43 through a connecting pin 42. The distance between the two connecting plates 43 is greater than the width of the support arm 41. When the rear axle shakes violently during driving, relative movement occurs between the support arm 41 and the connecting plate 43 and the bridge tube 1. A rubber gasket 44 is also provided. The rubber gasket 44 is squeezed during movement to provide buffering for the movement and avoid damage to the connection of the support arm 41.

[0024] Furthermore, if Figure 1 and Figure 3 As shown, a reinforcing rod 7 connected to the vehicle frame is fixedly provided on one side of the supporting arm 41. The supporting arm 41 and the reinforcing rod 7 are both connected to the vehicle frame 1, that is, connected to the vehicle frame 1 at two points, and by providing the supporting arm 41 with two connecting components 4, a multi-point connection with the vehicle frame can be achieved, thereby increasing the connection strength between the supporting arm 41 and the vehicle frame, thereby increasing the support strength for the rear axle to a certain extent, especially reducing the lateral movement of the supporting arm 41 caused by the lateral shaking of the rear axle, resulting in an unstable connection between the supporting arm 41 and the vehicle frame.

[0025] Furthermore, if Figure 1 and Figure 3 As shown, a connection block 71 is provided between the reinforcing rod 7 and the bracket arm 41. The connection block 71 is provided to increase the connection strength between the reinforcing rod 7 and the bracket arm 41.

[0026] Furthermore, two connecting pins 42 are provided on the same support arm 41 to increase the connection reliability. The diameter of the mounting hole is larger than the diameter of the through hole, so that the support arm 41 can move relative to the connecting pin 42, driving the support arm 41 to deflect upward or downward in a small range, and also allowing the other end of the support arm 41 to deflect relative to the frame to adapt to the vibration of the rear axle within a certain range in the vertical direction.

[0027] Furthermore, if Figure 1 and Figure 2 As shown, a hinge seat 11 is fixedly provided on the bridge tube 1, and the connecting column 31 is hinged on the hinge seat 11. The connecting column 31 is hinged on the bridge tube 1 through the hinge seat 11.

[0028] Furthermore, if Figure 2As shown, a lower limit tube 311 is provided at the lower end of the connecting column 31, an upper limit tube 321 is provided at the upper end of the supporting column 32, and a spring 8 is sleeved between the lower limit tube 311 and the upper limit tube 321. When the rear axle vibrates, the supporting column 32 moves relatively on the connecting column 31, and the spring 8 is extended or contracted accordingly, and the spring 8 is used for buffering. The lower limit tube 311 and the upper limit tube 321 are provided to limit and fix the two ends of the spring 8, and the external sleeve spring 8 can quickly reset the connecting column 31 and the supporting column 32 after the vibration is decelerated.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A rear axle structure of a tricycle, characterized in that: include: A bridge tube (1), a wheel hub (2), a shock absorbing assembly (3) and a connecting assembly (4); The bridge tubes (1) are provided with two, a gearbox is connected between the two bridge tubes (1), the two bridge tubes (1) are coaxially arranged, a transmission shaft is arranged inside the bridge tube (1), one end of the transmission shaft is connected to the output shaft of the gearbox, and the other end is connected to the wheel hub (2), a brake disc (5) is arranged on the wheel hub (2), and a disc brake mechanism (6) cooperating with the brake disc (5) is also arranged on the bridge tube (1); The shock absorbing assembly (3) comprises a connecting column (31) and a supporting column (32) whose upper end is connected to the vehicle frame; one end of the connecting column (31) is hinged on the bridge tube (1), and the lower end of the supporting column (32) is elastically connected to the connecting column (31); The connecting assembly (4) comprises a supporting arm (41), a connecting pin (42) and two connecting plates (43); the connecting plates (43) are fixed on the bridge tube (1); the distance between the two connecting plates (43) is greater than the width of the supporting arm (41); a through hole is provided on the connecting plate (43); one end of the supporting arm (41) is connected to the vehicle frame; the other end is correspondingly provided with a mounting hole; the connecting pin (42) passes through the mounting hole; the two ends of the connecting pin (42) respectively pass through the through holes and are threadedly connected with nuts; a rubber gasket (44) is provided on the connecting pin (42) and located between the supporting arm (41) and the connecting plate (43).

2. A tricycle rear axle structure as claimed in claim 1, characterized in that: A reinforcing rod (7) connected to the vehicle frame is fixedly provided on one side of the supporting arm (41).

3. A tricycle rear axle structure as claimed in claim 2, characterized in that: A connecting block (71) is provided between the reinforcing rod (7) and the supporting arm (41).

4. A tricycle rear axle structure as claimed in claim 1, characterized in that: Two connecting pins (42) are arranged on the same supporting arm (41), and the diameter of the mounting hole is larger than the diameter of the through hole.

5. A tricycle rear axle structure as claimed in claim 1, characterized in that: A hinge seat (11) is fixedly provided on the bridge pipe (1), and the connecting column (31) is hinged on the hinge seat (11).

6. A tricycle rear axle structure as claimed in claim 1, characterized in that: A lower limit tube (311) is provided at the lower end of the connecting column (31), an upper limit tube (321) is provided at the upper end of the supporting column (32), and a spring (8) is sleeved between the lower limit tube (311) and the upper limit tube (321).

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