Double-cavity brake pump for agricultural machinery and engineering machinery

Abstract

The utility model relates to a double-cavity brake pump of agricultural machinery and engineering machinery, which comprises a double-cavity brake pump body, the right side of the double-cavity brake pump body is fixedly connected with a protective sleeve, a piston is arranged in the double-cavity brake pump body, one side of the piston is fixedly connected with a push rod assembly, the double-cavity brake pump body is provided with a brake assembly, and the brake assembly is fixedly connected with the piston. The brake assembly comprises an oil return valve body arranged in the double-cavity brake pump body. According to the double-cavity brake pump for the agricultural machinery and the engineering machinery, the large-caliber oil storage cavity is adopted, the small-caliber brake cavity is pushed to work, the relation between hydraulic pressure and braking force in the double-cavity brake pump body is fundamentally changed, the effective area of the double-cavity brake pump body is increased through the oil storage cavity, sufficient oil supply is ensured, the braking force is enhanced through a variable-diameter structure of the piston, and the braking force is increased. The brake performance of a product is improved, the force for stepping on the brake pedal is amplified, larger brake force is generated, the operation intensity of a driver is reduced, and the comfort and safety of driving are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-chamber brake pumps, in particular to a double-chamber brake pump for agricultural machinery and engineering machinery. Background Art

[0002] In recent years, with the continuous development and progress of economy and technology, various types of agricultural machinery, such as tractors, have been widely used in rural areas of my country. Brake pumps are installed on agricultural machinery and engineering machinery. Their main function is to lift the brake pads so that the brake pads rub against the brake drum, reducing the braking speed and stopping. The double-chamber brake pump is two single-chamber brake master cylinders connected by a bracket to become a double-chamber brake master cylinder.

[0003] For example, announcement number CN214084198U proposes a double-connected quantitative brake pump, including a cylinder body 1, a piston 1, a push rod 1, a cylinder body 2, a piston 2 and a push rod 2. The cylinder body 1 and the cylinder body 2 are separated from each other, and the oil inlets of the cylinder body 1 and the cylinder body 2 are provided with quantitative fast-charging structures. The sides of the cylinder body 1 and the cylinder body 2 are respectively penetrated by connecting holes 1 and 2. However, during the use of this utility model, after replacing a single-chamber brake pump, the problem of imbalance in the braking force of the two chambers often occurs, and the exposed connecting oil pipes are accidentally bumped, deformed or fallen off, resulting in brake failure and even safety accidents. Therefore, a double-chamber brake pump for agricultural machinery and engineering machinery is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a double-chamber brake pump for agricultural machinery and engineering machinery, which has the advantages of brake balance, etc. It solves the problem that after replacing a single-chamber brake pump, the imbalance of the braking force between the two chambers often occurs, and the exposed connecting oil pipe is accidentally bumped, deformed or falls off, resulting in brake failure and even safety accidents.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-chamber brake pump for agricultural machinery and engineering machinery, comprising a double-chamber brake pump body, a protective sleeve is fixedly connected to the right side of the double-chamber brake pump body, a piston is arranged inside the double-chamber brake pump body, a push rod assembly is fixedly connected to one side of the piston, and a brake assembly is arranged on the double-chamber brake pump body;

[0006] The brake assembly includes an oil return valve body arranged inside a double-chamber brake pump body, an inner hexagon socket is arranged inside the oil return valve body, an oil return valve return spring is arranged on the oil return valve body, a retaining ring for a small hole and a flat washer are arranged inside the oil return valve body, a first steel ball is arranged inside the oil return valve body, an oil return valve spring is arranged inside the oil return valve body, a return spring is arranged inside the double-chamber brake pump body, an inner hexagon socket is arranged inside the double-chamber brake pump body, a second steel ball is arranged inside the double-chamber brake pump body, a one-way valve spring is arranged inside the double-chamber brake pump body, and a push rod sleeve and a retaining ring for a hole are arranged at the connection between the push rod assembly and the double-chamber brake pump body.

[0007] Furthermore, a hexagonal plug is provided on the double-chamber brake pump body, a third steel ball is provided inside the double-chamber brake pump body, a plug spring is provided inside the double-chamber brake pump body, and a composite gasket is provided at the connection between the double-chamber brake pump body and the hexagonal plug.

[0008] Furthermore, a hexagon socket plug is provided on the double-chamber brake pump body, and a rubber gasket is provided at the connection between the hexagon socket plug and the double-chamber brake pump body.

[0009] Furthermore, a first Y-shaped sealing ring, a second Y-shaped sealing ring and a large Y-shaped sealing ring for sealing are arranged inside the double-chamber brake pump body.

[0010] Furthermore, the double-chamber brake pump body is made of aluminum alloy material, and a large-hole retaining ring is provided between the piston and the double-chamber brake pump body.

[0011] Furthermore, an oil inlet is provided on the top of the double-chamber brake pump body, and the hexagonal plug is arranged at the oil inlet.

[0012] Furthermore, an oil outlet is provided at the bottom of the double-chamber brake pump body, and the hexagonal plug is arranged at the oil inlet.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The double-chamber brake pump of agricultural machinery and engineering machinery adopts a large-diameter oil storage chamber to push the small-diameter brake chamber to work, which fundamentally changes the relationship between the internal fluid pressure and the braking force of the double-chamber brake pump body. The oil storage chamber increases the effective area of ​​the double-chamber brake pump body to ensure sufficient oil supply. The piston enhances the braking force through the variable diameter structure, improves the braking performance of the product, amplifies the force of stepping on the brake pedal to generate greater braking force, reduces the driver's operating intensity, and improves driving comfort and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the double-chamber brake pump body of the utility model.

[0017] In the figure: 1 push rod assembly, 2 protective sleeve, 3 retaining ring for large hole, 4 double-chamber brake pump body, 5 large Y-shaped sealing ring, 6 piston, 7 retaining ring for small hole, 8 flat washer, 9 return oil valve body, 10 hexagon socket, 11 return oil valve spring, 12 first steel ball, 13 return oil valve return spring, 14 first Y-shaped sealing ring, 15 second steel ball, 16 check valve spring, 17 second Y-shaped sealing ring, 18 hexagon socket, 19 third steel ball, 20 plug spring, 21 composite washer, 22 hexagon plug, 23 return spring, 24 rubber washer, 25 hexagon socket plug, 26 push rod sleeve, 27 retaining ring for hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-2 In this embodiment, a double-chamber brake pump for agricultural machinery and engineering machinery includes a double-chamber brake pump body 4, a protective sleeve 2 is fixedly connected to the right side of the double-chamber brake pump body 4, a piston 6 is arranged inside the double-chamber brake pump body 4, a large-hole retaining ring 3 is arranged between the piston 6 and the double-chamber brake pump body 4, a push rod assembly 1 is fixedly connected to one side of the piston 6, and a brake assembly is arranged on the double-chamber brake pump body 4;

[0020] The brake assembly includes an oil return valve body 9 arranged inside a double-chamber brake pump body 4, an inner hexagon socket 10 is arranged inside the oil return valve body 9, an oil return valve return spring 13 is arranged on the oil return valve body 9, a small hole retaining ring 7 and a flat washer 8 are arranged inside the oil return valve body 9, a first steel ball 12 is arranged inside the oil return valve body 9, an oil return valve spring 11 is arranged inside the oil return valve body 9, a return spring 23 is arranged inside the double-chamber brake pump body 4, an inner hexagon socket 18 is arranged inside the double-chamber brake pump body 4, a second steel ball 15 is arranged inside the double-chamber brake pump body 4, a check valve spring 16 is arranged inside the double-chamber brake pump body 4, and a push rod sleeve 26 and a hole retaining ring 27 are arranged at the connection between the push rod assembly 1 and the double-chamber brake pump body 4.

[0021] See also Figure 1-2A hexagonal plug 22 is provided on the double-chamber brake pump body 4, an oil inlet is provided on the top of the double-chamber brake pump body 4, the hexagonal plug 22 is arranged at the oil inlet, a third steel ball 19 is provided inside the double-chamber brake pump body 4, a plug spring 20 is provided inside the double-chamber brake pump body 4, a composite gasket 21 is provided at the connection between the double-chamber brake pump body 4 and the hexagonal plug 22, an inner hexagonal plug 25 is provided on the double-chamber brake pump body 4, an oil outlet is provided at the bottom of the double-chamber brake pump body 4, the inner hexagonal plug 25 is arranged at the oil inlet, a rubber gasket 24 is provided at the connection between the inner hexagonal plug 25 and the double-chamber brake pump body 4, and a first Y-shaped sealing ring 14, a second Y-shaped sealing ring 17 and a large Y-shaped sealing ring 5 for sealing are provided inside the double-chamber brake pump body 4.

[0022] Among them, the double-chamber brake pump body 4 is made of aluminum alloy, and the cylinder body is hard anodized, which greatly improves the wear resistance, usability and durability of the double-chamber brake pump body 4. It solves the problem that the traditional double-chamber brake master cylinder is made of cast iron, which leads to heavy casting weight and unsightly appearance. After the vehicle has been out of use for a period of time, rust is likely to appear in the brake chamber, and even cause the piston to get stuck, and the connecting plate becomes loose after a certain period of use.

[0023] It should be noted that the dual-chamber brake pump body 4 adopts a large-diameter oil storage chamber to push the small-diameter brake chamber to work, which fundamentally changes the relationship between the liquid pressure in the dual-chamber brake pump body 4 and the braking force. The oil storage chamber increases the effective area of ​​the dual-chamber brake pump body 4 to ensure sufficient oil supply. The piston 6 enhances the braking force through the variable diameter structure, improves the braking performance of the product, and amplifies the force of stepping on the brake pedal to generate greater braking force, reduce the driver's operating intensity, and improve driving comfort and safety.

[0024] The working principle of the above embodiment is:

[0025] The double-chamber brake pump of the agricultural machinery and the engineering machinery, the double-chamber brake pump body 4 is used for the vehicle braking device. When braking, the push rod assembly 1 pushes the piston 6 forward, and the liquid in the double-chamber brake pump body 4 is subjected to pressure to act on the cylinder piston with a larger area to form a thrust, and then the push rod assembly 1 pushes the hydraulic piston with a smaller area in the hydraulic cylinder to move. The two-stage piston has a certain pressure increase ratio, so that the pressure in the double-chamber brake pump body 4 is enhanced, and the output enhanced pressure brake cylinder makes the brake shoe pins on both sides rotate and open, and presses the friction plate on the inner cylindrical surface of the brake and rubs with the brake drum to hinder the rotation of the wheel, and finally stops the wheel. When the brake is released, the piston 6 returns under the return action, and the oil in the pipeline quickly flows back to the double-chamber brake pump body 4 through the return valve assembly, and the brake is released.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-chamber brake pump for agricultural machinery and engineering machinery, comprising a double-chamber brake pump body (4), characterized in that: A protective sleeve (2) is fixedly connected to the right side of the double-chamber brake pump body (4), a piston (6) is arranged inside the double-chamber brake pump body (4), a push rod assembly (1) is fixedly connected to one side of the piston (6), and a brake assembly is arranged on the double-chamber brake pump body (4); The brake assembly comprises an oil return valve body (9) arranged inside a double-chamber brake pump body (4), a hexagon socket (10) being arranged inside the oil return valve body (9), an oil return valve return spring (13) being arranged on the oil return valve body (9), a retaining ring (7) for a small hole and a flat washer (8) being arranged inside the oil return valve body (9), a first steel ball (12) being arranged inside the oil return valve body (9), and an oil return valve spring (13) being arranged inside the oil return valve body (9). A spring (11) is provided inside the double-chamber brake pump body (4), a return spring (23) is provided inside the double-chamber brake pump body (4), a hexagonal screw sleeve (18) is provided inside the double-chamber brake pump body (4), a second steel ball (15) is provided inside the double-chamber brake pump body (4), a one-way valve spring (16) is provided inside the double-chamber brake pump body (4), and a push rod sleeve (26) and a hole retaining ring (27) are provided at the connection between the push rod assembly (1) and the double-chamber brake pump body (4).

2. A double-chamber brake pump for agricultural machinery and engineering machinery according to claim 1, characterized in that: The double-chamber brake pump body (4) is provided with a hexagonal plug (22), a third steel ball (19) is provided inside the double-chamber brake pump body (4), a plug spring (20) is provided inside the double-chamber brake pump body (4), and a composite gasket (21) is provided at the connection between the double-chamber brake pump body (4) and the hexagonal plug (22).

3. The double-chamber brake pump for agricultural machinery and engineering machinery according to claim 1, characterized in that: The double-chamber brake pump body (4) is provided with a hexagonal plug (25), and a rubber gasket (24) is provided at the connection between the hexagonal plug (25) and the double-chamber brake pump body (4).

4. A double-chamber brake pump for agricultural machinery and engineering machinery according to claim 1, characterized in that: The interior of the double-chamber brake pump body (4) is provided with a first Y-shaped sealing ring (14), a second Y-shaped sealing ring (17) and a large Y-shaped sealing ring (5) for sealing.

5. The double-chamber brake pump for agricultural machinery and engineering machinery according to claim 1, characterized in that: The double-chamber brake pump body (4) is made of an aluminum alloy material, and a large-hole retaining ring (3) is provided between the piston (6) and the double-chamber brake pump body (4).

6. A double-chamber brake pump for agricultural machinery and engineering machinery according to claim 2, characterized in that: An oil inlet is provided at the top of the double-chamber brake pump body (4), and the hexagonal plug (22) is arranged at the oil inlet.

7. A double-chamber brake pump for agricultural machinery and engineering machinery according to claim 3, characterized in that: An oil outlet is provided at the bottom of the double-chamber brake pump body (4), and the hexagon socket plug (25) is arranged at the oil inlet.

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