Clearance self-adjusting drum type forklift brake

Abstract

The utility model discloses a clearance self-adjusting drum-type forklift brake which comprises a brake drum, a brake shoe is installed at the front end of the brake drum, a brake wheel cylinder is installed at the upper position of the front end of the brake shoe, a sleeve is connected to the outer wall of a return spring in a sleeved mode, and the outer wall of the return spring is sleeved with a brake wheel cylinder. According to the device, a sleeve is connected to the outer wall of a return spring in a sleeving mode, when the return spring is stretched, the sleeve can rotate with a gear shaft rod as a circle center shaft, the gear shaft rod rotates in a gear groove, the gear shaft rod can rotate in the gear groove, and therefore the brake shoe can rotate in the gear groove; and meanwhile, the stretching of the return spring enables the upper supporting seat to generate displacement, the upper supporting seat moves along the connecting column, and the movement of the connecting column enables the pushing plate to extrude the stainless steel spring, so that the displacement amplitude of the return spring can be limited when the brake shoe is subjected to applied force, and the phenomenon that the return spring falls off is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field related to clearance self-adjusting drum type forklift brakes, and in particular relates to a clearance self-adjusting drum type forklift brake. Background Art

[0002] A self-adjusting drum brake is a braking system for forklifts that features automatic brake clearance adjustment. This feature automatically adjusts the clearance between the brake disc and drum based on wear, ensuring consistent and reliable braking. This type of brake is commonly used on forklifts that require frequent braking and handle heavy loads, improving safety and operating efficiency.

[0003] When the clearance self-adjusting drum forklift brake is in use, the return spring is used to reset the brake shoe. However, when the brake shoe is working repeatedly, the return spring will be repeatedly stretched, which will cause the displacement of the return spring to be too large, and then the spring will fall off. Utility Model Content

[0004] The purpose of the utility model is to provide a clearance self-adjusting drum forklift brake to solve the problem proposed in the above background technology that when the clearance self-adjusting drum forklift brake is in use, the return spring is used to reset the brake shoe, but when the brake shoe works repeatedly, the return spring is repeatedly stretched, which makes the displacement amplitude of the return spring too large, and then causes the spring to fall off.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clearance self-adjusting drum forklift brake, comprising a brake drum, a brake shoe is installed at the front end position of the brake drum, a brake wheel cylinder is installed at the front end of the brake shoe at the upper position, a return spring is installed at the front end of the brake shoe at the upper left and right positions, a sleeve is sleeved at the outer wall position of the return spring, a gear shaft is fixed at the lower end position of the sleeve, an upper support seat is sleeved at the lower end position of the gear shaft, the upper support seat is installed with the gear shaft through the gear groove at the inner position of the upper end, a lower support seat is installed at the lower end position of the upper support seat, a connecting column is fixed at the lower end position of the upper support seat, a push plate is fixed at the lower end position of the connecting column, and a stainless steel spring is sleeved at the outer wall position of the connecting column;

[0006] The front end of the brake shoe is installed with a ball at the middle inner position, the front end of the brake shoe is installed with a positioning pin spring for positioning at the left and right end positions, and the front end of the brake shoe is installed with an adjuster at the lower position.

[0007] Preferably, friction plates are provided at the left and right ends of the brake shoe, and the friction plates are attached to the inner wall of the brake drum.

[0008] Preferably, the brake drum is mounted on the wheel via bolts, and the balls are fitted on the outer wall of the wheel axle.

[0009] Preferably, the balls rotate when the wheel rotates, and the balls rotate at an inner position of the brake drum.

[0010] Preferably, the wheel brake cylinder is pressurized when a user steps on a foot pedal and applies pressure to the brake drum.

[0011] Preferably, the return spring quickly returns to its original position after the brake shoe stops applying the braking force, and the return spring causes the sleeve to rotate after being stretched.

[0012] Preferably, the rotation of the sleeve causes the gear shaft to rotate at an inner position of the gear groove, and an excessive stretching amplitude of the return spring causes a distance to be generated between the upper support seat and the lower support seat.

[0013] Preferably, the upper support seat is positioned via a connecting column, and movement of the connecting column causes the push plate to squeeze the stainless steel spring.

[0014] Compared with the prior art, the present invention provides a clearance self-adjusting drum forklift brake, which has the following beneficial effects:

[0015] 1. This device has a sleeve sleeved on the outer wall of the return spring. When the return spring is stretched, the sleeve will rotate with the gear shaft as the central axis, and the gear shaft will rotate at the internal position of the gear groove. At the same time, the stretching of the return spring will cause the upper support seat to displace, and the upper support seat will move along the connecting column. The movement of the connecting column causes the push plate to squeeze the stainless steel spring, so that when the brake shoe is subjected to force, the displacement amplitude of the return spring can be limited, thereby preventing the return spring from falling off.

[0016] 2. This device has multiple balls installed on the inner side of the brake drum. The balls fit into the axle of the wheel. When the wheel rotates, the balls rotate inside the brake drum, which can reduce the friction between the brake drum and the wheel when it is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic structural diagram of a clearance self-adjusting drum forklift brake.

[0018] Figure 2 The utility model is a partially enlarged structural schematic diagram of a clearance self-adjusting drum forklift brake.

[0019] Figure 3 The utility model is a schematic diagram of the structure of a clearance self-adjusting drum forklift brake sleeve.

[0020] Figure 4 The utility model is a schematic cross-sectional structure diagram of a clearance self-adjusting drum forklift brake support seat.

[0021] In the figure: 1. Brake drum; 2. Brake wheel cylinder; 3. Brake shoe; 4. Return spring; 5. Ball; 6. Adjuster; 7. Locating pin spring; 8. Friction plate; 9. Sleeve; 10. Gear shaft; 11. Upper support seat; 12. Lower support seat; 13. Gear groove; 14. Push plate; 15. Connecting column; 16. Stainless steel spring. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] The utility model provides Figure 1-4 The self-adjusting drum brake for forklift shown in the figure comprises a brake drum 1, a brake shoe 3 is installed at the front end of the brake drum 1, a brake wheel cylinder 2 is installed at the upper front end of the brake shoe 3, and a return spring 4 is installed at the upper left and right sides of the front end of the brake shoe 3. A sleeve 9 is sleeved on the outer wall of the return spring 4, and a gear shaft 10 is fixed at the lower end of the sleeve 9. An upper support seat 11 is sleeved on the lower end of the gear shaft 10. The upper support seat 11 is connected to the gear through a gear groove 13 at the inner position of the upper end. The axle rod 10 is installed, and a lower support seat 12 is installed at the lower end position of the upper support seat 11. A connecting column 15 is fixed at the lower end position of the upper support seat 11, and a push plate 14 is fixed at the lower end position of the connecting column 15. At the same time, a stainless steel spring 16 is sleeved on the outer wall position of the connecting column 15. The front end of the brake shoe 3 is installed with a ball 5 at the middle inner position, and the front end of the brake shoe 3 is installed with a positioning pin spring 7 for positioning at the left and right ends. The front end of the brake shoe 3 is installed with an adjuster 6 at the lower position.

[0024] When the forklift driver steps on the brake pedal, the wheel cylinder 2 applies pressure, which is transmitted to the brake shoe 3, causing it to apply braking force to the brake drum 1, braking the wheel and stopping or slowing the vehicle. After the force of stepping on the brake pedal disappears, the return spring 4 returns the brake shoe 3 to its original position, the braking force disappears, and the wheel returns to a free state. The adjuster 6 is responsible for maintaining a constant braking effect as the friction plate 8 wears.

[0025] like Figure 1 and Figure 4 As shown, friction plates 8 are provided at the left and right ends of the brake shoe 3. The friction plates 8 are attached to the inner wall of the brake drum 1. The brake drum 1 is installed with the wheel by bolts. The ball 5 is attached to the outer wall of the wheel shaft. The ball 5 rotates when the wheel rotates. The ball 5 rotates at the internal position of the brake drum 1. The brake wheel cylinder 2 is subjected to pressure and applies pressure to the brake drum 1 when the user steps on the pedal. The return spring 4 quickly returns to its original position after the brake shoe 3 stops braking. The return spring 4 causes the sleeve 9 to rotate after being stretched. The rotation of the sleeve 9 causes the gear shaft 10 to rotate at the internal position of the gear groove 13. The stretching amplitude of the return spring 4 is too large, which causes a distance between the upper support seat 11 and the lower support seat 12. The upper support seat 11 is located through the connecting column 15. The movement of the connecting column 15 causes the push plate 14 to squeeze the stainless steel spring 16.

[0026] When the return spring 4 is stretched, the sleeve 9 will rotate with the gear shaft 10 as the central axis, and the gear shaft 10 will rotate at the internal position of the gear groove 13. At the same time, the stretching of the return spring 4 will cause the upper support seat 11 to be displaced, and the upper support seat 11 will move along the connecting column 15. The movement of the connecting column 15 causes the push plate 14 to squeeze the stainless steel spring 16, so that the displacement amplitude of the return spring 4 can be limited when the brake shoe 3 is subjected to force.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clearance self-adjusting drum forklift brake, characterized in that: The invention comprises a brake drum (1), a brake shoe (3) is installed at the front end of the brake drum (1), a brake wheel cylinder (2) is installed at the upper position of the front end of the brake shoe (3), a return spring (4) is installed at the upper left and right positions of the front end of the brake shoe (3), a sleeve (9) is sleeved at the outer wall of the return spring (4), a gear shaft (10) is fixed at the lower end of the sleeve (9), and the gear shaft (10) is sleeved at the lower end of the gear shaft (10). An upper support seat (11) is connected, and the upper support seat (11) is installed with the gear shaft (10) through a gear groove (13) at the inner position of the upper end, and a lower support seat (12) is installed at the lower end position of the upper support seat (11), and a connecting column (15) is fixed at the lower end position of the upper support seat (11), and a push plate (14) is fixed at the lower end position of the connecting column (15), and a stainless steel spring (16) is sleeved at the outer wall position of the connecting column (15); The front end of the brake shoe (3) is provided with a ball (5) at a middle inner position, the front end of the brake shoe (3) is provided with a positioning pin spring (7) at left and right end positions for positioning, and the front end of the brake shoe (3) is provided with an adjuster (6) at a lower position.

2. The clearance self-adjusting drum forklift brake according to claim 1, characterized in that: Friction plates (8) are provided at the left and right ends of the brake shoe (3), and the friction plates (8) are fitted on the inner wall of the brake drum (1).

3. The clearance self-adjusting drum forklift brake according to claim 1, characterized in that: The brake drum (1) is mounted on the wheel via bolts, and the balls (5) are fitted on the outer wall of the wheel shaft.

4. The clearance self-adjusting drum forklift brake according to claim 3, characterized in that: The balls (5) rotate when the wheel rotates, and the balls (5) rotate at an inner position of the brake drum (1).

5. The clearance self-adjusting drum forklift brake according to claim 1, characterized in that: The brake wheel cylinder (2) is subjected to pressure when a user steps on a foot pedal and applies pressure to the brake drum (1).

6. The clearance self-adjusting drum forklift brake according to claim 1, characterized in that: The return spring (4) quickly returns to its original position after the brake shoe (3) stops applying the braking force, and the return spring (4) causes the sleeve (9) to rotate after being stretched.

7. The clearance self-adjusting drum forklift brake according to claim 6, characterized in that: The rotation of the sleeve (9) causes the gear shaft (10) to rotate at an inner position of the gear groove (13), and the excessive stretching amplitude of the return spring (4) causes a distance to be generated between the upper support seat (11) and the lower support seat (12).

8. The clearance self-adjusting drum forklift brake according to claim 7, characterized in that: The upper support seat (11) is positioned via a connecting column (15), and the movement of the connecting column (15) causes the push plate (14) to squeeze the stainless steel spring (16).

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