A pneumatic brake booster system

Abstract

This utility model provides a pneumatic brake assist system, belonging to the technical field of winch braking systems. It includes a brake handle, a brake lever, a brake band, and a brake drum. The brake handle is connected to the brake band via the brake lever, and the brake band covers the outer circumference of the brake drum. It also includes: a cylinder, one end of which is hinged to a mounting platform, and the other end to the brake lever; an air tank, which is connected to the rodless chamber of the cylinder via an air inlet line; a gas pressure regulating valve, which is connected in series on the air inlet line; and a linkage, which moves with the rotation of the brake handle and drives the gas pressure regulating valve to adjust the gas flow from the air tank to the cylinder according to the rotation angle of the brake handle. This utility model, through the linkage of a cam and the gas pressure regulating valve, adjusts the assist level by adjusting the angle of the brake handle, achieving precise adjustment of the winch speed. It has a simple and compact structure, low cost, and reliable performance.

Description

Technical Field

[0001] This utility model relates to a winch braking system, and more particularly to a pneumatically assisted braking system with brakes. Background Technology

[0002] Traditional winches with brakes rely on manual operation of a brake handle to engage a brake band that grips the brake drum. When the winch requires frequent braking, the operator expends considerable effort manually controlling the brakes. While electric and hydraulic brakes offer some labor savings, they only offer two states: direct braking and direct release. Operators cannot control the tension of the brake band against the brake drum, hindering precise winch speed control. This leads to situations requiring precise control, where sudden braking can cause severe load swaying or abrupt stops, generating significant impacts. This poses serious safety hazards and can damage equipment and reduce operational accuracy. To mitigate this, operators are often forced to use frequent "pump braking," further increasing workload and accelerating brake component wear. Furthermore, electric braking systems face significant limitations and safety risks in flammable and explosive environments (such as oil fields, mines, and chemical plants). Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pneumatic brake assist system. Under the linkage of the cam and the gas pressure regulating valve, the assist magnitude is adjusted by the angle of the brake handle, thereby achieving precise adjustment of the winch speed. The system is simple and compact in structure, low in cost, and safe and reliable in performance.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a pneumatic brake assist system, comprising a brake handle, a brake lever, a brake band, and a brake drum, wherein the brake handle is connected to the brake band via the brake lever, the brake band covers the outer periphery of the brake drum, and further comprising:

[0005] A cylinder, one end of which is hinged to the mounting platform and the other end of which is hinged to the brake lever;

[0006] An air storage tank, wherein the air storage tank is connected to the rodless chamber of the cylinder via an air inlet pipeline;

[0007] A gas pressure regulating valve, wherein the gas pressure regulating valve is connected in series on the gas inlet pipeline;

[0008] A linkage component moves with the rotation of the brake handle and drives the gas pressure regulating valve to adjust the gas flow rate from the gas tank to the cylinder according to the rotation angle of the brake handle.

[0009] As an improvement of this utility model, it also includes a trigger rod, one end of which contacts the linkage component, and the other end of which contacts the adjustment button of the gas pressure regulating valve.

[0010] As an improvement of this utility model, the linkage component is a cam that is coaxially and fixedly connected to the brake handle, and the profile surface of the cam is in contact with one end of the trigger rod.

[0011] As an improvement of this utility model, a reset spring is sleeved on the trigger rod. The reset spring is used to drive the trigger rod and the adjustment button of the gas pressure regulating valve to reset when the brake handle is reset.

[0012] As an improvement of this utility model, the gas pressure regulating valve is a push-button type gas pressure regulating valve, and its output gas pressure is proportional to the pressing force applied to its regulating button.

[0013] The beneficial effects of this utility model are as follows: This utility model discloses a pneumatic brake-assisted system, which, through the coordinated action of a cylinder, an air tank, a gas pressure regulating valve, and a linkage component, achieves a direct proportional relationship between brake assistance and handle angle via the linkage of a cam and the gas pressure regulating valve. Operators can easily control the braking force and winch speed, significantly reducing operator fatigue and, more importantly, enabling precise adjustment of the winch speed. By employing a pneumatic system, there are no electrical components, making it suitable for flammable and explosive environments. A return spring ensures rapid system reset, improving operational safety. The system is simple, compact, low-cost, and reliable in performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] In the diagram, 1. Brake handle; 2. Gas pressure regulating valve; 3. Brake lever; 4. Cylinder; 5. Brake band; 6. Brake drum; 7. Mounting platform; 8. Intake line I; 9. Cam; 10. Return spring; 11. Trigger rod; 12. Intake line II; 13. Air tank. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] It should be noted that the directional terms such as upper, lower, inner, outer, upper part, middle part, and lower part used in the embodiments of this utility model are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0018] like Figure 1 As shown, a pneumatic brake assist system includes a brake handle 1, a gas pressure regulating valve 2, a brake lever 3, a cylinder 4, a brake band 5, a brake drum 6, a cam 9, a trigger rod 11, and an air tank 13. The brake handle 1 is connected to the brake band 5 via the brake lever 3, and the brake band 5 covers the outer periphery of the brake drum 6. One end of the cylinder 4 is hinged to the mounting platform 7, and the other end is hinged to the brake lever 3. The air tank 13 is connected to the air inlet of the gas pressure regulating valve 2 via an air inlet line II 12, and the air outlet of the gas pressure regulating valve 2 is connected to the rodless chamber of the cylinder 4 via an air inlet line I 8. The cam 9 is coaxially fixed to the brake handle 1, and the contour surface of the cam 9 contacts one end of the trigger rod 11, while the other end of the trigger rod 11 contacts the adjustment button of the gas pressure regulating valve 2. The cam 9 moves with the rotation of the brake handle 1 and drives the gas pressure regulating valve 2 to adjust the gas flow from the air tank 13 to the cylinder 4 according to the rotation angle of the brake handle 1. It should be noted that the aforementioned installation platform 7 is preferably the platform of an oilfield-specific work vehicle, but it can also be other installation bases.

[0019] The aforementioned gas pressure regulating valve 2 is a push-button type gas pressure regulating valve, and its output gas pressure is proportional to the pressing force applied to its adjustment button. A return spring 10 is sleeved on the trigger rod 11. The return spring 10 is used to drive the trigger rod 11 and the adjustment button of the gas pressure regulating valve 2 to reset when the brake handle 1 is reset, thereby reducing the amount of gas supplied to the cylinder 4.

[0020] The working process of this embodiment is as follows: When the operator pulls down the brake handle 1, two actions occur simultaneously: First, the brake lever 3 directly tightens the ring brake band 5, generating initial braking force; second, the rotation of the brake handle 1 drives the cam 9 to rotate, and the rise of the cam 9 pushes the trigger rod 11 to move, which in turn presses the adjustment button of the gas pressure regulating valve 2. The pressing force increases with the increase of the downward angle of the brake handle 1, and the gas pressure regulating valve 2 linearly increases the output air pressure accordingly. The pressurized gas enters the cylinder 4, pushing the piston rod to extend. This thrust acts on the brake lever 3, forming an assist, significantly reducing the force required by the operator. When the brake needs to be released, the operator releases the brake handle 1. Under the action of the elastic force of the brake band 5 (or the additional reset mechanism), the brake handle 1 tends to return to its original position. At this time, the cam 9 rotates in the opposite direction, the pressure on the trigger rod 11 is eliminated, the reset spring 10 pushes the trigger rod 11 to reset, the adjustment button of the gas pressure regulating valve 2 pops up, the air circuit is closed, the piston rod of the cylinder 4 retracts under the action of external pulling force, and the assist is released.

[0021] The above provides a detailed description of the pneumatic brake assist system provided by this utility model. Specific examples have been used to illustrate the technical principles and implementation methods of this utility model. The above embodiments are only used to help understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pneumatic brake assist system, comprising a brake handle, a brake lever, a brake band, and a brake drum, wherein the brake handle is connected to the brake band via the brake lever, and the brake band covers the outer periphery of the brake drum, characterized in that, Also includes: A cylinder, one end of which is hinged to the mounting platform and the other end of which is hinged to the brake lever; An air storage tank, wherein the air storage tank is connected to the rodless chamber of the cylinder via an air inlet pipeline; A gas pressure regulating valve, wherein the gas pressure regulating valve is connected in series on the gas inlet pipeline; A linkage component moves with the rotation of the brake handle and drives the gas pressure regulating valve to adjust the gas flow rate from the gas tank to the cylinder according to the rotation angle of the brake handle.

2. A pneumatic belt brake assist system according to claim 1, characterized in that It also includes a trigger rod, one end of which contacts the linkage component, and the other end of which contacts the adjustment button of the gas pressure regulating valve.

3. A pneumatic belt brake assist system according to claim 2, characterized in that: The linkage component is a cam that is coaxially and fixedly connected to the brake handle, and the profile surface of the cam is in contact with one end of the trigger rod.

4. A pneumatic belt brake assist system according to claim 2, characterized in that: A reset spring is fitted on the trigger rod. The reset spring is used to drive the trigger rod and the adjustment button of the gas pressure regulating valve to reset when the brake handle is reset.

5. A pneumatic belt brake assist system according to any one of claims 1 to 4, characterized in that: The gas pressure regulating valve is a push-button type gas pressure regulating valve, and its output gas pressure is proportional to the pressing force applied to its regulating button.

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