A parking brake structure

Abstract

The present invention relates to the technical field of electric carts, and specifically to a parking brake structure, which includes a body frame assembly, a parking brake pedal assembly, and a rear axle assembly. The lower part of the body frame assembly is provided with a rear axle assembly. One side of the rear axle assembly is provided with a parking brake pedal assembly, and the other side of the rear axle assembly is provided with a brake rotating shaft. The left and right ends of the brake rotating shaft are connected to the lower part of the body frame assembly through a rotating shaft connecting plate. Two brake connecting plates are fixedly arranged on the brake rotating shaft. Two brake friction plate assemblies are respectively arranged on the left and right sides of the rear axle assembly, and a swing arm is arranged on one side of the brake friction plate assembly. Compared with the prior art, the parking brake structure adopted in the present invention is interconnected through connecting rods, achieving the purpose of quickly parking and braking a small electric cart, being convenient to operate, stable and reliable, simple and lightweight in structure, and overcoming the problems of poor operability of the traditional hand-pulled braking structure, easy breakage of the cable, and the existence of unknowable dangerous factors after breakage.

Description

Technical Field

[0001] The present invention relates to the technical field of electric carts, and more specifically to a parking brake structure. Background Art

[0002] At present, the parking brake structure of small electric carts on the market is generally a handle wire type. The handle wire type parking brake structure has poor operation convenience, the wire is easy to break, and there are unknown risk factors after the break. The characteristics of small electric carts on the market currently are small size, compact structure, and insufficient layout space. How to meet the requirements of space layout, ensure the service life requirements of the braking system, and enable the parking brake system to be operated easily and flexibly will become the direction of research, design, and development. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention designs a parking brake structure to achieve the purpose of convenient operation, stable and reliable performance, simple and lightweight structure, and rapid parking.

[0004] The present invention provides a parking brake structure, including a body frame assembly, a parking brake pedal assembly, and a rear axle assembly. The lower part of the body frame assembly is provided with a rear axle assembly. One side of the rear axle assembly is provided with a parking brake pedal assembly, and the other side of the rear axle assembly is provided with a brake rotating shaft. The left and right ends of the brake rotating shaft are connected to the lower part of the body frame assembly through a rotating shaft connecting plate. Two brake connecting plates are fixedly arranged on the brake rotating shaft. Two brake friction plate assemblies are respectively arranged on the left and right sides of the rear axle assembly. One side of the brake friction plate assembly is provided with a swing arm. The two brake connecting plates are respectively connected to the swing arms of the two brake friction plate assemblies through two brake connecting rods. A right-angle adapter fixing bracket is arranged at the lower end of one side of the rear axle assembly. A right-angle adapter is arranged on the right-angle adapter fixing bracket. An L-shaped adapter rotating shaft is arranged below the brake rotating shaft. An L-shaped adapter is arranged on the L-shaped adapter rotating shaft. The upper end of the L-shaped adapter is respectively connected to the brake connecting plate and the brake connecting rod through a first horizontal connecting rod. The lower end of the L-shaped adapter is connected to one end of the right-angle adapter through a second horizontal connecting rod. The other end of the right-angle adapter is connected to the parking brake pedal assembly through a vertical connecting rod.

[0005] Further, the L-shaped adapter rotating shaft is connected to the body frame assembly, and the L-shaped adapter is hinged to the body frame assembly through the L-shaped adapter rotating shaft.

[0006] Further, the parking brake pedal assembly includes a pedal assembly bracket, a rotating ratchet, a service brake pedal, and pedal arm teeth. A pedal assembly bracket is provided at the rear of the vehicle frame. The inner side of the pedal assembly bracket is connected to the service brake pedal through a rotating shaft. The service brake pedal is provided with pedal arm teeth. A rotating ratchet is provided above the service brake pedal. The pedal arm teeth are in contact with the rotating ratchet. One end of the service brake pedal is connected to the upper end of a longitudinal connecting rod.

[0007] Further, a brake pedal is provided on the brake rotating shaft.

[0008] Further, the right-angle adapter is in a "7" - shaped structure, and the middle part of the right-angle adapter is hinged to a right-angle adapter fixed bracket.

[0009] Further, the swing arm is connected to the brake friction plate assembly through a pull rod swing arm rotating shaft.

[0010] Compared with the prior art, the parking brake structure adopted in the present invention is interconnected through linkages, achieving the purpose of quickly parking and braking a small electric trolley. It is convenient to operate, stable and reliable, and has a simple and lightweight structure, overcoming the problems of poor operability of the traditional hand-pulled brake structure, easy breakage of the wire rope, and the existence of unknown risk factors after breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the overall structure of the parking brake structure of the present invention Figure 1 。

[0012] Figure 2 is the overall structure of the parking brake structure of the present invention Figure 2 。

[0013] Figure 3 is the side view of the partial structure of the parking brake structure of the present invention.

[0014] Figure 4 is the top view of the parking brake structure of the present invention.

[0015] Figure 5 is the side view of the body mounting structure of the parking brake structure of the present invention.

[0016] Figure 6 is the top view of the body mounting structure of the parking brake structure of the present invention.

[0017] Figure 7 is the schematic diagram of the overall vehicle structure of the parking brake structure of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be further described in conjunction with the accompanying drawings.

[0019] See Figure 1 、2 、 3, 4, 5, 6, 7, the present invention is a parking brake structure, including a body frame assembly 1, a parking brake pedal assembly 2, and a rear axle assembly 3. The lower part of the body frame assembly 1 is provided with the rear axle assembly 3. One side of the rear axle assembly 3 is provided with the parking brake pedal assembly 2. The other side of the rear axle assembly 3 is provided with a brake rotating shaft 4. The left and right ends of the brake rotating shaft 4 are connected to the lower part of the body frame assembly 5 through a rotating shaft connecting plate 5. Two brake connecting plates 6 are fixedly arranged on the brake rotating shaft 4. Two brake friction plate assemblies 7 are respectively arranged on the left and right sides of the rear axle assembly 3. One side of the brake friction plate assembly 7 is provided with a swing arm 8. The two brake connecting plates 6 are respectively connected to the swing arms 8 of the two brake friction plate assemblies 7 through two brake connecting pull rods 9. One lower end of one side of the rear axle assembly 3 is provided with a right-angle adapter fixing bracket 10. A right-angle adapter 11 is arranged on the right-angle adapter fixing bracket 10. Below the brake rotating shaft 4 is provided with a linear direction adapter rotating shaft 12. A linear direction adapter 13 is arranged on the linear direction adapter rotating shaft 12. The upper end of the linear direction adapter 13 is respectively connected to the brake connecting plate 6 and the brake connecting pull rod 9 through a horizontal connecting rod one 14. The lower end of the linear direction adapter 13 is connected to one end of the right-angle adapter 11 through a horizontal connecting rod two 15. The other end of the right-angle adapter 11 is connected to the parking brake pedal assembly 2 through a vertical connecting rod 16.

[0020] The linear direction adapter rotating shaft 12 is connected to the body frame assembly 1. The linear direction adapter 13 is hinged to the body frame assembly 1 through the linear direction adapter rotating shaft 12. The parking brake pedal assembly 2 includes a pedal assembly bracket 17, a rotating ratchet 18, a service brake pedal 19, and a pedal arm tooth 20. The rear part of the body frame assembly 1 is provided with the pedal assembly bracket 17. The inner side of the pedal assembly bracket 17 is connected to the service brake pedal 19 through a rotating shaft. The service brake pedal 19 is provided with the pedal arm tooth 20. Above the service brake pedal 19 is provided with the rotating ratchet 18. The pedal arm tooth 20 abuts against the rotating ratchet 18. One end of the service brake pedal 19 is connected to the upper end of the vertical connecting rod 16. A brake pedal 21 is arranged on the brake rotating shaft 4. The right-angle adapter 11 is in a "7" - shaped structure. The middle part of the right-angle adapter 11 is hinged to the right-angle adapter fixing bracket 10. The swing arm 8 is connected to the brake friction plate assembly 7 through a pull rod swing arm rotating shaft 22.

[0021] During specific implementation:

[0022] First, fix the parking brake pedal assembly 2 to the body frame assembly 1 with three bolts, as shown in the appendix Figure 5 shown;

[0023] As shown in the appendix Figure 1As shown in the figure, both the left and right ends of the braking rotating shaft 4 are connected to the lower part of the vehicle body frame assembly 5 through the rotating shaft connecting plate 5, and the right-angle adapter fixing bracket 10 is welded to the rear axle assembly 3;

[0024] The right-angle adapter 11 is fixed to the right-angle adapter fixing bracket 10 with bolts;

[0025] The longitudinal connecting rod 16 is fixed between the right-angle adapter 11 and the parking brake pedal assembly 2 through a split pin, and the other end of the right-angle adapter 11 is connected to the parking brake pedal assembly 2 through the longitudinal connecting rod 16;

[0026] The second transverse connecting rod 15 is fixed to the right-angle adapter 11 and the one-way adapter 13 through a split pin; the lower end of the one-way adapter 13 is connected to one end of the right-angle adapter 11 through the second transverse connecting rod 15;

[0027] The middle part of the one-way adapter 13 is fixed to the vehicle body frame assembly 1 through a fixing bolt via the one-way adapter rotating shaft 12;

[0028] The upper end of the one-way adapter 13 is respectively connected to the braking connecting plate 6 and the braking connecting rod 9 through the first transverse connecting rod 14;

[0029] Two braking connecting plates 6 are fixedly arranged on the braking rotating shaft 4. Two braking friction plate assemblies 7 are respectively arranged on the left and right sides of the rear axle assembly 3. One side of the braking friction plate assembly 7 is provided with a swing arm 8. The two braking connecting plates 6 are respectively connected to the swing arms 8 of the two braking friction plate assemblies 7 through two braking connecting rods 9;

[0030] When parking, when the parking brake pedal assembly 2 is stepped on with the foot, the rotating ratchet 18 will be stuck on the pedal arm teeth 20. The other end of the service brake pedal 19 on the inner side of the pedal assembly bracket 17 will tilt up under the action of the rotating shaft lever, driving the longitudinal connecting rod 16 to be lifted, driving the right-angle adapter 11 to rotate upward, driving the second transverse connecting rod 15 to move towards the parking brake pedal assembly 2, driving the one-way adapter 13 to rotate around the one-way adapter rotating shaft 12, driving the first transverse connecting rod 14 to move relative to the second transverse connecting rod 15, driving the braking connecting rod 9 to move in the same direction as the first transverse connecting rod 14. The first transverse connecting rod 14 pulls the swing arm 8 to rotate around the connecting rod swing arm rotating shaft 22, so that the braking friction plate assembly 7 expands and presses tightly against the brake drum to complete the braking.

[0031] When driving is required, in the state of parking brake, step on the parking brake pedal assembly 2 with the foot again, the rotating ratchet 18 will lift from the pedal arm teeth 20. Release the foot, and the parking brake pedal assembly 2 will lift, and the parking brake is released.

Claims

1. A parking brake structure, comprising a vehicle body frame assembly (1), a parking brake pedal assembly (2), and a rear axle assembly (3), characterized in that: The lower part of the vehicle body frame assembly (1) is provided with a rear axle assembly (3). On one side of the rear axle assembly (3), there is a parking brake pedal assembly (2). On the other side of the rear axle assembly (3), there is a brake rotating shaft (4). The left and right ends of the brake rotating shaft (4) are connected to the lower part of the vehicle body frame assembly (5) through a rotating shaft connecting plate (5). Two brake connecting plates (6) are fixedly arranged on the brake rotating shaft (4). On the left and right sides of the rear axle assembly (3), there are respectively two brake friction plate assemblies (7). On one side of the brake friction plate assembly (7), there is a swing arm (8). The two brake connecting plates (6) are respectively connected to the swing arms (8) of the two brake friction plate assemblies (7) through two brake connecting pull rods (9). At the lower end of one side of the rear axle assembly (3), there is a right-angle adapter fixing bracket (10). A right-angle adapter (11) is arranged on the right-angle adapter fixing bracket (10). Below the brake rotating shaft (4), there is a straight-through direction adapter rotating shaft (12). A straight-through direction adapter (13) is arranged on the straight-through direction adapter rotating shaft (12). The upper end of the straight-through direction adapter (13) is connected to the brake connecting plate (6) and the brake connecting pull rod (9) respectively through a horizontal connecting rod one (14). The lower end of the straight-through direction adapter (13) is connected to one end of the right-angle adapter (11) through a horizontal connecting rod two (15). The other end of the right-angle adapter (11) is connected to the parking brake pedal assembly (2) through a vertical connecting rod (16).

2. The parking brake structure according to claim 1, characterized in that: The straight-through direction adapter rotating shaft (12) is connected to the vehicle body frame assembly (1), and the straight-through direction adapter (13) is hinged to the vehicle body frame assembly (1) through the straight-through direction adapter rotating shaft (12).

3. The parking brake structure according to claim 1, wherein: The parking brake pedal assembly (2) includes a pedal assembly bracket (17), a rotating ratchet (18), a service brake pedal (19), and a pedal arm tooth (20). The pedal assembly bracket (17) is arranged at the rear of the vehicle body frame assembly (1). The inner side of the pedal assembly bracket (17) is connected to the service brake pedal (19) through a rotating shaft. The service brake pedal (19) is provided with a pedal arm tooth (20). Above the service brake pedal (19), there is a rotating ratchet (18). The pedal arm tooth (20) abuts against the rotating ratchet (18). One end of the service brake pedal (19) is connected to the upper end of the vertical connecting rod (16).

4. The parking brake structure according to claim 1, wherein: A brake pedal (21) is arranged on the brake rotating shaft (4).

5. A parking brake structure according to claim 1, characterized in that: The right-angle adapter (11) has a "7"-shaped structure, and the middle part of the right-angle adapter (11) is hinged to the right-angle adapter fixing bracket (10).

6. A parking brake structure according to claim 1, characterized in that: The swing arm (8) is connected to the brake friction plate assembly (7) through a pull rod swing arm rotating shaft (22).

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