Suspension type rear axle assembly structure of electric tricycle

Abstract

The utility model relates to the field of electro-tricycles, in particular to a suspension type rear axle assembly structure of an electro-tricycle, which comprises a gearbox. Connecting pipes are arranged on the surfaces of the left side and the right side of the gear box, half shafts are rotationally connected to the positions, located on the inner sides of the connecting pipes, of the surfaces of the left side and the right side of the gear box, and brake drums are installed at the ends, away from the gear box, of the half shafts through bearings; two symmetrical brake pads are movably connected to the interior of the brake drum; the adjusting screw is arranged and can rotate in the hole of the mounting piece, so that the cam is driven to rotate, the cam is fixed through the fixing cap after rotation adjustment is completed, and when the cam rotates to the protruding position to be attached to the brake pad, the brake pad can move towards one side of the brake drum under the action of the tension spring, so that the brake pad is fixed. Therefore, the brake stroke is shortened, and the problem that the brake effect is not ideal due to the fact that the tension spring is loosened after being used for a long time is solved.

Description

Technical Field

[0001] This utility model relates to the field of electric tricycles, and more particularly to the structure of a suspended rear axle assembly for electric tricycles. Background Technology

[0002] The suspended rear axle of an electric tricycle, also known as a floating rear axle or independent suspension rear axle, is an improved rear axle design. Compared with the traditional rigid rear axle, it has better shock absorption performance and driving stability, and is suitable for electric tricycles that are used for heavy loads, rough roads, or those that prioritize comfort.

[0003] The existing suspension rear axle assembly of electric tricycles cannot adjust the limiting structure of the brake pads during use, which makes it impossible to adjust the distance between the brake pads and the inner wall of the brake drum. After long-term use, the tension springs may loosen, which can easily lead to unsatisfactory braking performance.

[0004] Therefore, in response to the problem that the existing brake pad limiting structure of the rear axle assembly of electric tricycles is not adjustable, which leads to the increase in the distance between the brake pad and the brake drum after the tension spring loosens, thus affecting braking, there is an urgent need to design a new type of suspended rear axle assembly structure for electric tricycles. Utility Model Content

[0005] In order to overcome the problem that the existing brake pad limiting structure of the rear axle assembly of electric tricycles is not adjustable, which leads to the increase in the distance between the brake pad and the brake drum after the tension spring loosens, thus affecting braking.

[0006] The technical solution of this utility model is as follows: a suspended rear axle assembly structure for an electric tricycle, including a gearbox; it also includes mounting plates, adjusting screws, cams, positioning plates, and fixing caps. Connecting pipes are provided on both the left and right surfaces of the gearbox. Half-shafts are rotatably connected to the inner sides of the connecting pipes on both sides of the gearbox. A brake drum is mounted on the end of the half-shaft away from the gearbox via a bearing. Two symmetrical brake pads are movably connected inside the brake drum. Tension springs are connected to the front ends of the two brake pads. A mounting plate is provided on the inner surface of the brake drum behind the two brake pads. Two adjusting screws are threadedly connected to the side of the mounting plate away from the gearbox. Cams are fitted on the outer surfaces of the adjusting screws. Positioning plates are provided on the side surfaces of the two cams away from the gearbox. Fixing caps are installed on the side surfaces of the positioning plates away from the cams. The fixing caps are threadedly connected to the adjusting screws.

[0007] Preferably, by setting an adjusting screw, which can rotate inside the hole of the mounting plate, the cam is driven to rotate. After the rotation adjustment is completed, it is fixed by a fixing cap. When the cam rotates to the protruding position and contacts the brake pad, it can cause the brake pad to move to one side of the brake drum under the action of the tension spring, thereby reducing the braking stroke. This avoids the problem of the tension spring loosening after long-term use, which leads to unsatisfactory braking effect. This solves the problem that the existing floating rear axle assembly of electric tricycles cannot adjust the limiting structure of the brake pads during use, which makes it impossible to adjust the distance between the brake pads and the inner wall of the brake drum. After long-term use, the tension spring loosens, which easily leads to unsatisfactory braking effect.

[0008] Preferably, a movable block is movably connected to the front position of the opposite surfaces of the two brake pads, and a rocker arm is fitted on the outer surface of the movable block near the gearbox, and the rocker arm is connected to the brake cable.

[0009] Preferably, the outer surface of the movable block is machined with a first tooth groove near the rocker arm, and the outer surface of the rocker arm is provided with a second tooth groove through the movable block, with the first tooth groove and the second tooth groove being adapted to each other.

[0010] Preferably, brake pads are provided on the side of the brake pads away from the tension spring, and the brake pads are fixed to the brake pads by welding.

[0011] Preferably, a motor housing is provided on the front surface of the gearbox, and the motor housing is fixed to the gearbox by bolts.

[0012] Preferably, a fixing seat is provided on the lower side of the outer surface of both connecting pipes, and the fixing seat is fixed to the connecting pipe by welding.

[0013] Preferably, a connecting seat is provided at the end of the half shaft away from the gearbox, and multiple plate wheel bolts are provided on the outer surface of the connecting seat.

[0014] The beneficial effects of this utility model are:

[0015] 1. By setting an adjusting screw, the cam is driven to rotate by rotating the adjusting screw installed in the mounting hole. After the cam angle is adjusted to the design requirements, the fixing cap is used to implement axial tightening. When the cam rotates to the point where its convex part contacts the brake pad, the contact force causes the brake pad to generate a displacement towards the brake drum under the elastic action of the tension spring. This displacement compensation effectively shortens the braking stroke. This mechanical compensation mechanism can accurately offset the plastic deformation of the tension spring under long-term load, thereby maintaining the initial design clearance of the braking system and ensuring that the braking performance meets the safety specifications. This solves the problem that the existing floating rear axle assembly of electric tricycles cannot adjust the limiting structure of the brake pads during use, resulting in the inability to adjust the distance between the brake pads and the inner wall of the brake drum. After long-term use, the tension spring may loosen, easily leading to unsatisfactory braking performance. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the suspended rear axle assembly of the electric tricycle of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the half-shaft of the suspended rear axle assembly of the electric tricycle of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the brake pads of the suspended rear axle assembly of the electric tricycle of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the movable block of the suspended rear axle assembly of the electric tricycle of this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional structural schematic of the rocker arm of the suspended rear axle assembly of the electric tricycle of this utility model.

[0021] Figure 6 The diagram shown is a three-dimensional structural diagram of the cam structure of the suspended rear axle assembly of the electric tricycle of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Gearbox; 2. Connecting pipe; 3. Half shaft; 4. Brake drum; 5. Brake pad; 6. Tension spring; 7. Mounting plate; 8. Adjusting screw; 9. Cam; 10. Positioning plate; 11. Fixing cap; 12. Moving block; 13. Rocker arm; 14. First tooth groove; 15. Second tooth groove; 16. Brake pad; 17. Motor housing; 18. Fixing seat; 19. Connecting seat; 20. Plate wheel bolt. Detailed Implementation

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

[0024] Please see Figures 1-6 This utility model provides an embodiment of a suspended rear axle assembly structure for an electric tricycle, including a gearbox 1; it also includes a mounting plate 7, adjusting screws 8, a cam 9, a positioning plate 10, and a fixing cap 11. Connecting pipes 2 are provided on both the left and right surfaces of the gearbox 1. Half-shafts 3 are rotatably connected to both the left and right surfaces of the gearbox 1 inside the connecting pipes 2. A brake drum 4 is mounted on the end of the half-shaft 3 away from the gearbox 1 via a bearing. Two symmetrical brake pads 5 are movably connected inside the brake drum 4. Tension springs 6 are connected to the front ends of the two brake pads 5. A mounting plate 7 is provided on the inner surface of the brake drum 4 behind the two brake pads 5. Two adjusting screws 8 are threadedly connected to the side of the mounting plate 7 away from the gearbox 1. Screw 8, the outer surface of the adjusting screw 8 is fitted with cams 9, and the two cams 9 are provided with positioning plates 10 on the side surface away from gearbox 1. The positioning plates 10 are provided with fixing caps 11 on the side surface away from cams 9. The fixing caps 11 are threadedly connected to the adjusting screw 8. By setting the adjusting screw 8, it can rotate inside the hole of the mounting plate 7, thereby driving the cams 9 to rotate. After the rotation adjustment is completed, it is fixed by fixing caps 11. When the cam 9 rotates to the protruding position and fits against the brake pad 5, it can cause the brake pad 5 to move to one side of the brake drum 4 under the action of the tension spring 6, thereby reducing the braking stroke. This is to avoid the problem of the tension spring 6 loosening after long-term use, resulting in unsatisfactory braking effect.

[0025] Please see Figures 1-6 In this embodiment, a movable block 12 is movably connected to the front of the opposing surfaces of the two brake pads 5. A rocker arm 13 is fitted on the outer surface of the movable block 12 near the gearbox 1. The rocker arm 13 is connected to the brake cable. By setting the movable block 12 and the rocker arm 13, after the brake is applied, the brake cable can pull the rocker arm 13, causing the rocker arm 13 to drive the movable block 12 to rotate, thereby pushing the two brake pads 5 apart and making them fit against the inner surface of the brake drum 4, thus achieving braking. A first toothed groove 14 is machined on the outer surface of the movable block 12 near the rocker arm 13. A second toothed groove 15 is provided through the position corresponding to the movable block 12. The first toothed groove 14 is adapted to the second toothed groove 15. By setting the first toothed groove 14 and the second toothed groove 15, it is easy to connect the rocker arm 13 and the movable block 12, and at the same time, it has a good meshing effect, ensuring that the rocker arm 13 can smoothly move the movable block 12. The side surface of the brake pad 5 away from the tension spring 6 is provided with brake pads 16. The brake pads 16 and the brake pads 5 are fixed by welding. By setting the brake pads 16, the friction between them and the brake drum 4 can be increased, thereby improving the braking effect and ensuring driving safety.

[0026] Please see Figures 1-6In this embodiment, a motor housing 17 is provided on the front surface of the gearbox 1. The motor housing 17 is fixed to the gearbox 1 by bolts. The motor housing 17 is provided to protect the drive motor and improve its service life. A fixing seat 18 is provided on the lower side of the outer surface of the two connecting pipes 2. The fixing seat 18 is fixed to the connecting pipe 2 by welding. The fixing seat 18 makes it easy to connect and fix the rear axle assembly to the vehicle body. A connecting seat 19 is provided at the end of the half shaft 3 away from the gearbox 1. Multiple plate wheel bolts 20 are provided on the outer surface of the connecting seat 19. The plate wheel bolts 20 facilitate the installation of the tricycle tire and have high fixing strength, which can effectively prevent the tire from loosening.

[0027] During operation, by setting up the movable block 12 and the rocker arm 13, after the brake is applied, the brake cable can pull the rocker arm 13, causing the rocker arm 13 to drive the movable block 12 to rotate, thereby pushing the two brake pads 5 apart and making them fit against the inner surface of the brake drum 4, thus achieving braking. By setting the first tooth groove 14 and the second tooth groove 15, it is easy to connect the rocker arm 13 and the movable block 12, and at the same time, it has a good meshing effect, ensuring that the rocker arm 13 can smoothly move the movable block 12. By setting the brake pad 16, the friction between it and the brake drum 4 can be increased, thereby improving the braking effect and ensuring driving safety. By setting the motor housing 17, the drive motor is protected and its service life is improved. By setting the fixing seat 18, the rear axle assembly can be easily connected and fixed to the vehicle body. By setting the plate wheel bolt 20, it is easy to install the tricycle tire, and at the same time, it has a high fixing strength, which can effectively prevent the tire from coming off.

[0028] Through the above steps, by setting the adjusting screw 8, the cam 9 is driven to rotate by rotating the adjusting screw 8 installed in the hole of the mounting plate 7. After the angle of the cam 9 is adjusted to the design requirements, the fixing cap 11 is used to implement axial tightening. When the cam 9 rotates to the point where its convex part contacts the brake pad 5, the contact force causes the brake pad 5 to generate a displacement in the direction of the brake drum 4 under the elastic action of the tension spring 6. This displacement compensation effectively shortens the braking stroke. This mechanical compensation mechanism can accurately offset the plastic deformation of the tension spring 6 under long-term load, thereby maintaining the initial design clearance of the braking system and ensuring that the braking performance meets the safety specifications. This solves the problem that the limiting structure of the existing electric tricycle's floating rear axle assembly cannot be adjusted when in use, resulting in the inability to adjust the distance between the brake pad 5 and the inner wall of the brake drum 4. After long-term use, the tension spring 6 becomes loose, which easily leads to unsatisfactory braking performance.

Claims

1. A suspended rear axle assembly structure for an electric tricycle, comprising a gearbox (1); characterized in that: It also includes a mounting plate (7), an adjusting screw (8), a cam (9), a positioning plate (10), and a fixing cap (11). Connecting pipes (2) are provided on both the left and right sides of the gearbox (1). Half shafts (3) are rotatably connected to both the left and right sides of the gearbox (1) inside the connecting pipes (2). A brake drum (4) is installed at the end of the half shaft (3) away from the gearbox (1) through a bearing. Two symmetrical brake pads (5) are movably connected inside the brake drum (4). Tension springs are connected to the front ends of the two brake pads (5). (6) The inner surface of the brake drum (4) is provided with a mounting plate (7) located behind the two brake pads (5). Two adjusting screws (8) are threadedly connected to the side surface of the mounting plate (7) away from the gearbox (1). A cam (9) is sleeved on the outer surface of the adjusting screw (8). A positioning plate (10) is provided on the side surface of the two cams (9) away from the gearbox (1). A fixing cap (11) is installed on the side surface of the positioning plate (10) away from the cam (9). The fixing cap (11) is threadedly connected to the adjusting screw (8).

2. The suspended rear axle assembly structure of the electric tricycle according to claim 1, characterized in that: Two brake pads (5) are movably connected to a movable block (12) at the front position of their opposite surfaces. A rocker arm (13) is fitted on the outer surface of the movable block (12) near the gearbox (1). The rocker arm (13) is connected to the brake cable.

3. The suspended rear axle assembly structure of the electric tricycle according to claim 2, characterized in that: The outer surface of the movable block (12) near the rocker arm (13) is machined with a first tooth groove (14), and the outer surface of the rocker arm (13) corresponding to the position of the movable block (12) is provided with a second tooth groove (15), and the first tooth groove (14) and the second tooth groove (15) are adapted to each other.

4. The suspended rear axle assembly structure of the electric tricycle according to claim 1, characterized in that: Brake pads (16) are provided on the side of the brake pad (5) away from the tension spring (6), and the brake pads (16) and brake pads (5) are fixed by welding.

5. The suspended rear axle assembly structure of the electric tricycle according to claim 1, characterized in that: A motor housing (17) is provided on the front surface of the gearbox (1), and the motor housing (17) is fixed to the gearbox (1) by bolts.

6. The suspended rear axle assembly structure of the electric tricycle according to claim 1, characterized in that: A fixing seat (18) is provided on the lower side of the outer surface of each of the two connecting pipes (2), and the fixing seat (18) is fixed to the connecting pipe (2) by welding.

7. The suspended rear axle assembly structure of the electric tricycle according to claim 1, characterized in that: A connecting seat (19) is provided at the end of the half shaft (3) away from the gearbox (1), and multiple plate wheel bolts (20) are provided on the outer surface of the connecting seat (19).

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