Plunger pump return plate of automobile hydraulic brake system

Abstract

The utility model discloses a plunger pump return plate of an automobile hydraulic brake system, which comprises a return plate body, a main shaft hole arranged at the middle point of the top of the return plate body, and a connecting and dismounting mechanism arranged on the return plate body and comprising plunger holes. The plunger holes are formed in the top of the return plate body at equal intervals in a surrounding mode, plunger rings and limiting and fixing mechanisms are arranged on the inner walls of the plunger holes, and the limiting and fixing mechanisms are arranged on the return plate body and comprise annular plates. The plunger holes, the plunger rings, the inserting grooves, the inserting blocks, the annular plates, the through grooves, the positioning blocks, the positioning grooves and the fastening bolts are matched with one another, so that the correspondingly abraded plunger rings can be conveniently disassembled and replaced, the situation that the plunger rings are communicated with the return plate to be disassembled and replaced together is avoided, the replacement cost is reduced, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of return discs, in particular to a return disc of a plunger pump of an automobile hydraulic brake system. Background Art

[0002] The plunger pump is an important component of the automobile hydraulic brake system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation. The plunger pump is widely used in high pressure, large flow and flow regulation occasions, such as hydraulic presses, construction machinery and ships. The plunger pump is generally divided into single plunger pump, horizontal plunger pump, axial plunger pump and radial plunger pump. After a long period of use, the internal return plate of the plunger pump will wear out.

[0003] According to the application number: CN202122083641.6, a return plate for a wear-resistant plunger pump relates to the field of plunger pumps. In view of the problem that the return plate structure inside the existing plunger pump is fixed and needs to be replaced as a whole when wear occurs, resulting in material waste, the following scheme is proposed, which includes a return plate body, the return plate body includes a first fan-shaped plate, a second fan-shaped plate and a third fan-shaped plate, and a main shaft hole is formed in the middle position when the first fan-shaped plate, the second fan-shaped plate and the third fan-shaped plate are spliced, and the first fan-shaped plate, the second fan-shaped plate and the third fan-shaped plate are each provided with a plunger hole passing through the plate ladder, and an assembly mechanism is provided at the splicing position of the first fan-shaped plate, the second fan-shaped plate and the third fan-shaped plate.

[0004] In the above case, the return plate cannot be removed and replaced separately with the corresponding worn plunger hole, which requires the return plate that is connected to be removed and replaced together, thus wasting resources, increasing the maintenance cost of the plunger pump, and reducing practicality. In addition, the strength and wear resistance of the return plate are not ideal, which affects its service life. Utility Model Content

[0005] The utility model aims to provide a plunger pump return plate of an automobile hydraulic brake system to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a plunger pump return plate of an automobile hydraulic brake system, comprising:

[0007] The return plate body has a main shaft hole at the midpoint of the top of the return plate body:

[0008] A connection and disassembly mechanism, the connection and disassembly mechanism is arranged on the return plate body, the connection and disassembly mechanism comprises a plunger hole, the number of the plunger holes is several and they are equidistantly arranged around the top of the return plate body, and a plunger ring is arranged on the inner wall of the plunger hole;

[0009] The position limiting and fixing mechanism is arranged on the return disc body, and the position limiting and fixing mechanism comprises an annular plate, and the annular plate is arranged on the top of the return disc body.

[0010] Preferably, slots that are interconnected with the plunger hole are provided on the top of the return disk body and on both sides of the inner wall of the plunger hole, and plug blocks are installed on the surface of the plunger ring and at positions corresponding to the slots. The plug block passes through the slot on one side close to the slot and extends to its interior to contact the inner wall of the slot.

[0011] Preferably, a through groove is provided on the top of the annular plate corresponding to the position of the plunger hole, positioning blocks are installed equidistantly around the bottom of the annular plate, and a positioning groove is provided on the top of the return disc body corresponding to the position of the positioning block.

[0012] Preferably, the bottom of the positioning block passes through the positioning groove and extends to the inside thereof to contact the inner wall of the positioning groove, and the top of the annular plate is provided with four fastening bolts threadedly connected to the return disc body.

[0013] Preferably, the return disc body is composed of a wear-resistant layer, a reinforcement layer, an impact-resistant layer and a base layer, the reinforcement layer is arranged on the inner wall of the wear-resistant layer, the impact-resistant layer is arranged on the inner wall of the reinforcement layer, and the base layer is arranged on the inner wall of the impact-resistant layer.

[0014] Preferably, the wear-resistant layer is made of chromium nitride film, the reinforcement layer is made of alloy steel, and the impact-resistant layer is made of foamed aluminum.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model facilitates the disassembly and replacement of the correspondingly worn plunger ring through the mutual cooperation of the plunger hole, plunger ring, slot, insert block, annular plate, through slot, positioning block, positioning slot and fastening bolt, avoiding the disassembly and replacement of the return plate together, thereby reducing the replacement cost and improving practicality.

[0017] 2. The utility model improves the wear resistance of the return disc surface by providing a wear-resistant layer, and improves the strength and impact resistance of the return disc by providing a reinforcement layer and an impact-resistant layer, thereby increasing the service life of the return disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is an exploded view of the three-dimensional structure of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the return plate body, plunger hole and slot top view of the utility model;

[0021] Figure 4 It is a structural cross-sectional view of the return disc body of the utility model in a top view.

[0022] In the figure: 1 return plate body, 11 wear-resistant layer, 12 reinforcement layer, 13 impact-resistant layer, 14 base layer, 100 spindle hole, 2 connection and disassembly mechanism, 21 plunger hole, 22 plunger ring, 23 slot, 24 insert block, 3 limit fixing mechanism, 31 annular plate, 32 through slot, 33 positioning block, 34 positioning slot, 35 fastening bolt. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-4 A return plate of a plunger pump of an automobile hydraulic brake system comprises: a return plate body 1, a main shaft hole 100 is opened at the midpoint of the top of the return plate body 1, the return plate body 1 is composed of a wear-resistant layer 11, a reinforcement layer 12, an impact-resistant layer 13 and a base layer 14, the reinforcement layer 12 is arranged on the inner wall of the wear-resistant layer 11, the wear-resistant layer 11 is made of a chromium nitride film, the impact-resistant layer 13 is arranged on the inner wall of the reinforcement layer 12, the reinforcement layer 12 is made of alloy steel, the base layer 14 is arranged on the inner wall of the impact-resistant layer 13, and the impact-resistant layer 13 is made of foamed aluminum.

[0025] By providing the wear-resistant layer 11, the wear resistance of the return disc surface is improved, and by providing the reinforcement layer 12 and the impact-resistant layer 13, the strength and impact resistance of the return disc are improved, thereby increasing the service life of the return disc.

[0026] A connecting and disassembling mechanism 2 is arranged on the return disk body 1. The connecting and disassembling mechanism 2 includes a plunger hole 21. The number of the plunger holes 21 is several and they are equidistantly arranged around the top of the return disk body 1. A plunger ring 22 is arranged on the inner wall of the plunger hole 21. The surface of the plunger ring 22 is in contact with the inner wall of the plunger hole 21. Slots 23 that are interconnected with the plunger hole 21 are arranged on the top of the return disk body 1 and on both sides of the inner wall of the plunger hole 21. A plug block 24 is fixedly connected to the surface of the plunger ring 22 and the position corresponding to the slot 23. The plug block 24 passes through the slot 23 close to the side of the slot 23 and extends to the inside thereof and is in contact with the inner wall of the slot 23.

[0027] The limiting and fixing mechanism 3 is arranged on the return disc body 1. The limiting and fixing mechanism 3 includes an annular plate 31. The annular plate 31 is arranged on the top of the return disc body 1. The side of the annular plate 31 close to the return disc body 1 is in contact with the return disc body 1. A through groove 32 is provided at the top of the annular plate 31 and corresponds to the position of the plunger hole 21. A positioning block 33 is fixedly connected to the bottom of the annular plate 31 at an equal distance. A positioning groove 34 is provided at the top of the return disc body 1 and corresponds to the position of the positioning block 33. The bottom of the positioning block 33 passes through the positioning groove 34 and extends to its inside and contacts with the inner wall of the positioning groove 34. By setting the positioning block 33 and the positioning groove 34, the stability of the connection between the annular plate 31 and the return disc body 1 is improved. Four fastening bolts 35 threadedly connected to the return disc body 1 are provided on the top of the annular plate 31.

[0028] Through the mutual cooperation of the plunger hole 21, the plunger ring 22, the slot 23, the insert block 24, the annular plate 31, the through slot 32, the positioning block 33, the positioning slot 34 and the fastening bolt 35, it is convenient to disassemble and replace the correspondingly worn plunger ring 22, avoiding the disassembly and replacement of the return disk together, thereby reducing the replacement cost and improving practicality.

[0029] When in use, loosen the fastening bolts 35, then pull the annular plate 31 upwards, the annular plate 31 drives the positioning block 33 to move upwards, so that the positioning block 33 and the positioning groove 34 are separated, and the annular plate 31 can be removed, and then pull the plunger ring 22 upwards, the plunger ring 22 drives the insert block 24 to move upwards, so that the insert block 24 and the slot 23 are separated, and the damaged plunger ring 22 can be removed for replacement.

[0030] In summary: the plunger pump return plate of the automobile hydraulic brake system solves the problems raised in the above-mentioned background technology through the mutual cooperation of the plunger hole 21, the plunger ring 22, the slot 23, the insert block 24, the annular plate 31, the through slot 32, the positioning block 33, the positioning slot 34 and the fastening bolt 35, by setting the wear-resistant layer 11, and by setting the reinforcement layer 12 and the impact-resistant layer 13.

[0031] 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 plunger pump return plate of an automobile hydraulic brake system, characterized in that: include: A return plate body (1), wherein a main shaft hole (100) is provided at the midpoint of the top of the return plate body (1): A connecting and disassembling mechanism (2), the connecting and disassembling mechanism (2) being arranged on the return plate body (1), the connecting and disassembling mechanism (2) comprising a plunger hole (21), the number of the plunger holes (21) being plural and being arranged around the top of the return plate body (1) at equal distances, and a plunger ring (22) being arranged on the inner wall of the plunger hole (21); A position limiting and fixing mechanism (3), wherein the position limiting and fixing mechanism (3) is arranged on the return disc body (1), and the position limiting and fixing mechanism (3) comprises an annular plate (31), and the annular plate (31) is arranged on the top of the return disc body (1).

2. The plunger pump return plate of a vehicle hydraulic brake system according to claim 1, characterized in that: A slot (23) communicating with the plunger hole (21) is provided on the top of the return plate body (1) and on both sides of the inner wall of the plunger hole (21); an insert block (24) is installed on the surface of the plunger ring (22) at a position corresponding to the slot (23); a side of the insert block (24) close to the slot (23) penetrates the slot (23) and extends to the inside thereof to contact the inner wall of the slot (23).

3. The plunger pump return plate of the automobile hydraulic brake system according to claim 2, characterized in that: A through groove (32) is provided at the top of the annular plate (31) and at a position corresponding to the plunger hole (21); positioning blocks (33) are installed around the bottom of the annular plate (31) at equal distances; and a positioning groove (34) is provided at the top of the return disc body (1) and at a position corresponding to the positioning block (33).

4. The plunger pump return plate of the automobile hydraulic brake system according to claim 3, characterized in that: The bottom of the positioning block (33) passes through the positioning groove (34) and extends to the inside thereof to contact the inner wall of the positioning groove (34). The top of the annular plate (31) is provided with four fastening bolts (35) threadedly connected to the return disc body (1).

5. The plunger pump return plate of a vehicle hydraulic brake system according to claim 1, characterized in that: The return disc body (1) is composed of a wear-resistant layer (11), a reinforcement layer (12), an impact-resistant layer (13) and a base layer (14); the reinforcement layer (12) is arranged on the inner wall of the wear-resistant layer (11), the impact-resistant layer (13) is arranged on the inner wall of the reinforcement layer (12), and the base layer (14) is arranged on the inner wall of the impact-resistant layer (13).

6. A plunger pump return plate for an automobile hydraulic brake system according to claim 5, characterized in that: The wear-resistant layer (11) is made of a chromium nitride film, the reinforcement layer (12) is made of alloy steel, and the impact-resistant layer (13) is made of foamed aluminum.

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