CN112360713B

CN112360713B - Automobile plunger pump system

Info

Publication number: CN112360713B
Application number: CN202011150326.4A
Authority: CN
Inventors: 单东升; 刘洋; 吴柳杰; 陈赞; 涂佳伟
Original assignee: Ningbo Saifu Automobile Brake Co ltd
Current assignee: Ningbo Saifu Automobile Brake Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-06-11
Anticipated expiration: 2040-10-23
Also published as: CN112360713A

Abstract

The application discloses an automobile plunger pump system, which comprises a pump body, a supporting seat, a pump plunger, a driving device, a guide sleeve, a first elastic part, a sealing structure, a check ring and a one-way valve structure, wherein a back pressure cavity is formed between the pump plunger and the supporting seat, and the first elastic part is positioned on one side of the guide sleeve, which is far away from the supporting seat; the sealing structure is sleeved between the pump plunger and the guide sleeve. The automobile plunger pump system disclosed in the embodiment sets up first elastic component outside the back pressure cavity, can make the internal diameter in back pressure cavity reduce like this, and the volume in back pressure cavity also reduces along with it, and simultaneously, the guide length when the pump plunger moves also can increase, can improve the effective compression ratio when the pump plunger moves to improve this automobile plunger pump system's oil return efficiency, strengthened anti-lock system's performance.

Description

Automobile plunger pump system

Technical Field

The invention relates to the field of automobile anti-lock brake systems, in particular to an automobile plunger pump system.

Background

The current development of the anti-lock brake system of the automobile is mature, the structure of the pump inside the anti-lock brake system is diversified, but the basic principle is that the plunger is driven by the electric motor to reciprocate, and high pressure is formed in a back pressure cavity inside the pump system, so that the aim of returning oil to the system or providing high pressure for the system is fulfilled. The plunger pump system that present general technique used all is that reset spring sets up inside the back pressure chamber, thereby because the reason of spring force makes the spring external diameter very big lead to the external diameter in back pressure chamber also very big, and then has increaseed the volume in back pressure chamber, so, the effective compression ratio of pump plunger reciprocating motion once diminishes, thereby it influences pump efficiency and then has reduced anti-lock system's performance to have reduced oil return rate.

Disclosure of Invention

The invention aims to solve the technical problem of disclosing an automobile plunger pump system so as to improve the problem.

The technical scheme adopted by the invention for solving the technical problems is as follows:

based on the above object, the present invention discloses an automotive plunger pump system, comprising:

the pump body is provided with a cavity, an oil inlet and an oil outlet, and the oil inlet and the oil outlet are communicated with the cavity;

the supporting seat is mounted on the pump body and located at the first end of the cavity, the supporting seat is located between the oil inlet and the oil outlet, and a first channel used for communicating the oil inlet and the oil outlet is arranged on the supporting seat;

the pump plunger is connected with the pump body in a sliding mode, a back pressure cavity is formed between the pump plunger and the supporting seat, and the oil inlet is communicated with the back pressure cavity;

the driving device is arranged at the second end of the pump body and is connected to one end, away from the supporting seat, of the pump plunger in a driving mode;

the guide sleeve is sleeved between the pump plunger and the pump body;

the first elastic piece is arranged between the guide sleeve and the pump plunger, the first elastic piece enables the pump plunger to have a tendency of being far away from the supporting seat, and the first elastic piece is positioned on one side, away from the supporting seat, of the guide sleeve;

the sealing structure is sleeved between the pump plunger and the guide sleeve;

the check ring is arranged on the pump body and is positioned between the guide sleeve and the support seat, a second channel is arranged on the check ring, and the oil inlet is communicated with the back pressure cavity through the second channel; and

the check valve structure comprises an end cap, a second elastic piece and a first steel ball, the end cap is installed on the pump body, the end cap is located on one side, away from the pump plunger, of the supporting seat, a third channel is arranged between the end cap and the supporting seat, the first steel ball is located at the first channel, the second elastic piece is located between the end cap and the first steel ball, and the second elastic piece enables the first steel ball to have a trend towards the supporting seat to move.

In some embodiments of this embodiment: and a second steel ball is arranged in the retainer ring, the diameter of the second channel is gradually reduced from the middle position to the two ends, the second steel ball is positioned in the second channel, the diameter of the second steel ball is smaller than the maximum diameter of the second channel, and the diameter of the second steel ball is larger than the minimum diameter of the second channel.

In some embodiments of this embodiment: and a third elastic piece is further arranged in the retainer ring, is arranged between the retainer ring and the second steel ball and enables the second steel ball to have a tendency of moving towards the oil inlet.

In some embodiments of this embodiment: the cross section of one end, facing the oil inlet, of the second channel is circular, and the cross section of one end, facing away from the oil inlet, of the second channel is rectangular.

In some embodiments of this embodiment: the driving device includes:

the hydraulic cylinder comprises a cylinder body, a first piston rod and a second piston rod, the cylinder body is connected with the pump body, the first piston rod is connected with the pump plunger, and the second piston rod is positioned at one end, far away from the pump plunger, of the first piston rod;

the hydraulic pump is a variable pump, and an adjusting knob is arranged on the hydraulic pump;

the adjusting device comprises an installing plate, a first sliding block, a second sliding block, a fourth elastic piece and a slider-crank structure, wherein a first sliding groove and a second sliding groove which are parallel and spaced are formed in the installing plate, the first sliding block and the second sliding block are respectively arranged in the first sliding groove and the second sliding groove in a sliding mode, the first sliding block is connected with the second piston rod, and when the first sliding block moves towards the pump plunger, the first sliding block can drive the second sliding block to synchronously slide;

the input end of the crank sliding block structure is connected with the second sliding block, the output end of the crank sliding block is connected with the adjusting knob, the fourth elastic piece is installed between the second sliding block and the installation plate, and the fourth elastic piece enables the second sliding block to have a tendency of moving towards a direction departing from the pump plunger;

when the second sliding block moves towards the pump plunger, the second sliding block can drive the adjusting knob to rotate, and the flow of the hydraulic pump is reduced.

In some embodiments of this embodiment: the first sliding block is provided with a first shifting block, the second sliding block is provided with a second shifting block, a fifth elastic piece, a permanent magnet, an electromagnet and a controller, the fifth elastic piece is installed between the second sliding block and the second shifting block, the fifth elastic piece enables the second shifting block to have a trend of being far away from the second sliding block, the permanent magnet is installed on either the second sliding block or the second shifting block, the electromagnet is installed on the other one, the electromagnet is electrically connected with the controller, and when the electromagnet is powered on, the magnetic force applied to the second shifting block by the electromagnet is opposite to the elastic force applied to the second shifting block by the fifth elastic piece; by controlling the electromagnet to be electrified or not electrified, the second shifting block can leave or enter the moving path of the first shifting block.

In some embodiments of this embodiment: the second sliding block is provided with a mounting hole, the mounting hole faces the first sliding groove, and the second shifting block, the fifth elastic piece, the permanent magnet and the electromagnet are all located in the mounting hole.

In some embodiments of this embodiment: the guide sleeve is in a step shape, one side of the first end of the guide sleeve is abutted to the pump body, the other side of the first end of the guide sleeve is arranged at an interval with the pump plunger, and the sealing structure is positioned between the first end of the guide sleeve and the pump plunger; one side of the second end of the guide sleeve is abutted to the pump plunger, the other side of the second end of the guide sleeve is arranged at an interval with the pump body, and the first elastic piece is located between the second end of the guide sleeve and the pump plunger.

In some embodiments of this embodiment: the seal structure includes:

the star ring is sleeved between the pump plunger and the guide sleeve; and

the pump plunger is sleeved with the guide sleeve, and the star-shaped ring is positioned between the two flat washers.

Compared with the prior art, the invention has the following beneficial effects:

the first elastic piece for resetting the pump plunger is arranged on one side of the guide sleeve, which is far away from the support seat, namely the first elastic piece is arranged outside the back pressure cavity, so that the inner diameter of the back pressure cavity can be reduced, the volume of the back pressure cavity is reduced, meanwhile, the guide length of the pump plunger during movement can be increased, the effective compression ratio of the pump plunger during movement can be improved, the oil return efficiency of the automobile plunger pump system is improved, and the performance of an anti-lock system is enhanced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic diagram of an automotive plunger pump system disclosed in embodiment 1 of the invention;

FIG. 2 shows a schematic view of the pump body disclosed in embodiment 1 of the present invention;

fig. 3 shows a schematic view of a retainer ring disclosed in embodiment 1 of the present invention;

FIG. 4 is a schematic view showing the connection between the support seat and the check valve structure disclosed in embodiment 1 of the present invention;

FIG. 5 is a schematic view showing the structure of the check valve disclosed in embodiment 1 of the present invention;

FIG. 6 is a schematic view of the guide sleeve disclosed in embodiment 1 of the present invention;

fig. 7 shows a schematic view of the drive device disclosed in embodiment 1 of the present invention;

FIG. 8 is a schematic view of the adjusting device disclosed in embodiment 1 of the present invention;

FIG. 9 is a partially enlarged view of FIG. 8 disclosed in embodiment 1 of the present invention;

fig. 10 shows a schematic view of the hydraulic cylinder disclosed in embodiment 1 of the present invention.

In the figure:

100-a pump body; 110-an oil inlet; 120-oil outlet; 130-a cavity; 140-a back pressure chamber; 200-a support seat; 210-a first channel; 220-a third channel; 300-a pump plunger; 400-a drive device; 410-hydraulic cylinder; 411-cylinder body; 412-a first piston rod; 413-a second piston rod; 420-a mounting plate; 421-a first chute; 422-a second chute; 430-a first slider; 431-a first dial; 440-a second slider; 441-a second shifting block; 442-a fifth elastic element; 443-a permanent magnet; 444-electromagnet; 450-a fourth resilient member; 460-crank block configuration; 470-hydraulic pump; 471-adjusting knob; 480-a regulating device; 490-a controller; 500-a guide sleeve; 600-a first elastic member; 700-a sealing structure; 710-star ring; 720-flat washer; 800-a retainer ring; 810-a second channel; 820-a second steel ball; 830-a third elastic member; 900-one-way valve configuration; 910-plug; 920-a second elastic member; 930-first steel ball.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as disclosed in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example (b):

referring to fig. 1 to 10, an embodiment of the present invention discloses an automotive plunger pump system, which includes a pump body 100, a support base 200, a pump plunger 300, a driving device 400, a guide sleeve 500, a first elastic element 600, a sealing structure 700, a retainer ring 800, and a check valve structure 900.

The pump body 100 is provided with a cavity 130, an oil inlet 110 and an oil outlet 120, and the oil inlet 110 and the oil outlet 120 are both communicated with the cavity 130; the support seat 200 is mounted on the pump body 100, the support seat 200 is located at the first end of the cavity 130, the support seat 200 is located between the oil inlet 110 and the oil outlet 120, and a first channel 210 for communicating the oil inlet 110 and the oil outlet 120 is arranged on the support seat 200; the pump plunger 300 is connected with the pump body 100 in a sliding manner, a back pressure cavity 140 is formed between the pump plunger 300 and the supporting seat 200, and the oil inlet 110 is communicated with the back pressure cavity 140; the driving device 400 is installed at the second end of the pump body 100, and the driving device 400 is connected to one end of the pump plunger 300 away from the supporting seat 200 in a driving manner; the guide sleeve 500 is sleeved between the pump plunger 300 and the pump body 100;

the first elastic element 600 is installed between the guide sleeve 500 and the pumping plunger 300, the first elastic element 600 makes the pumping plunger 300 have a tendency to be far away from the supporting seat 200, and the first elastic element 600 is located on one side of the guide sleeve 500 far away from the supporting seat 200;

the sealing structure 700 is sleeved between the pump plunger 300 and the guide sleeve 500; the retainer ring 800 is mounted on the pump body 100, the retainer ring 800 is positioned between the guide sleeve 500 and the support seat 200, the retainer ring 800 is provided with a second channel 810, and the oil inlet 110 is communicated with the back pressure cavity 140 through the second channel 810; the check valve structure 900 includes a plug 910, a second elastic member 920 and a first steel ball 930, the plug 910 is installed on the pump body 100, the plug 910 is located on a side of the support base 200 facing away from the pump plunger 300, a third channel 220 is provided between the plug 910 and the support base 200, the first steel ball 930 is located at the first channel 210, the second elastic member 920 is located between the plug 910 and the first steel ball 930, and the second elastic member 920 makes the first steel ball 930 have a tendency to move toward the support base 200.

The plunger pump system for the automobile disclosed by the embodiment is mainly applied to an anti-lock brake system for the automobile.

The automobile plunger pump system disclosed in the embodiment is to arrange the first elastic member 600 for resetting the pump plunger 300 on the side of the guide sleeve 500 away from the support base 200, that is, the first elastic member 600 is located outside the back pressure cavity 140, so that the inner diameter of the back pressure cavity 140 can be reduced, the volume of the back pressure cavity 140 is also reduced, meanwhile, the guide length of the pump plunger 300 during movement can be increased, the effective compression ratio of the pump plunger 300 during movement can be improved, thereby improving the oil return efficiency of the automobile plunger pump system, and enhancing the performance of an anti-lock system.

In some embodiments of this embodiment, a second steel ball 820 is disposed in the retainer ring 800, the diameter of the second channel 810 gradually decreases from the middle position to the two ends, the second steel ball 820 is disposed in the second channel 810, the diameter of the second steel ball 820 is smaller than the maximum diameter of the second channel 810, and the diameter of the second steel ball 820 is larger than the minimum diameter of the second channel 810.

When the pump plunger 300 moves towards the direction departing from the support seat 200, the first steel ball 930 blocks the first passage 210 under the action of the second elastic member 920, when the pump plunger 300 continues to be away from the support seat 200, the pressure in the back pressure cavity 140 is reduced, at this time, the oil enters the back pressure cavity 140 along the oil inlet 110 and the second passage 810, and in the process, the oil pushes the second steel ball 820 to move towards the direction departing from the oil inlet 110, so as to avoid blocking the oil inlet 110; when the pump plunger 300 moves towards the support seat 200, the pressure in the back pressure chamber 140 increases, and the first steel ball 930 is pressed against the support seat 200 by the pushing force of the second elastic member 920, and the second steel ball 820 is relatively free, so that the second steel ball 820 moves towards the oil inlet 110 under the pushing force of the oil, and the oil inlet 110 is further closed, and when the pump plunger 300 continues to move, the pressure in the back pressure chamber 140 continues to increase, so that the first steel ball 930 leaves the support seat 200 by overcoming the elastic force of the second elastic member 920, at this time, the first passage 210 is opened, and the oil can enter the oil outlet 120 along the first passage 210 and the third passage 220.

In some embodiments of the present embodiment, a third elastic member 830 is further disposed in the retainer ring 800, the third elastic member 830 is installed between the retainer ring 800 and the second steel ball 820, and the third elastic member 830 makes the second steel ball 820 have a tendency to move toward the oil inlet 110.

By using the third elastic member 830, the reliability of sealing the oil inlet 110 when the pump plunger 300 moves toward the support seat 200 can be enhanced, the oil is prevented from flowing backward, and at the same time, at the beginning of the movement of the pump plunger 300 toward the support seat 200, the pressure in the back pressure chamber 140 is suddenly increased, and when the second steel ball 820 is pressed to move toward the oil inlet 110, part of the oil will flow back along the gap, and the third elastic element 830 can effectively avoid this situation, when the pump plunger 300 moves away from the support seat 200 to the maximum distance, the third elastic member 830 may close the oil inlet 110 at the first time, thereby avoiding the oil from flowing back, and in addition, the third elastic element 830 enables the second steel ball 820 to always have a space with one end of the second channel 810 departing from the oil inlet 110, therefore, when oil enters the back pressure cavity 140 along the oil inlet 110, the second channel 810 is prevented from being blocked by the second steel ball 820 due to the movement of the oil.

In some embodiments of the present embodiment, a cross section of an end of the second channel 810 facing the oil inlet 110 is circular, and a cross section of an end of the second channel 810 facing away from the oil inlet 110 is rectangular.

When the second steel ball 820 moves towards the oil inlet 110, the shape of the second steel ball 820 can be matched with one end of the second channel 810 facing the oil inlet 110, so that the second channel 810 is closed with the oil inlet 110, and when the second steel ball 820 moves towards the back pressure cavity 140, the port of the second channel 810 in the direction cannot be matched with the second steel ball 820, so that the second steel ball 820 cannot completely close the second channel 810, and therefore, the oil can smoothly enter the back pressure cavity 140 along the second channel 810.

In some embodiments of the present embodiment, the driving device 400 includes a hydraulic cylinder 410, a hydraulic pump 470, and an adjusting device 480.

The hydraulic cylinder 410 comprises a cylinder body 411, a first piston rod 412 and a second piston rod 413, the cylinder body 411 is connected with the pump body 100, the first piston rod 412 is connected with the pump plunger 300, the pump plunger 300 can be pushed to move towards the supporting seat 200 or the pump plunger 300 is pulled to be away from the supporting seat 200 by using the first piston rod 412, and the second piston rod 413 is positioned at one end of the first piston rod 412, which is away from the pump plunger 300;

the hydraulic pump 470 in this embodiment may be improved on the basis of an existing swash plate type variable pump, specifically, an adjusting knob 471 may be provided on the hydraulic pump 470, and the output quantity of the hydraulic pump 470 is controlled by twisting the adjusting knob 471;

the adjusting device 480 comprises a mounting plate 420, a first slider 430, a second slider 440, a fourth elastic element 450 and a slider-crank structure 460, wherein the mounting plate 420 is provided with a first sliding chute 421 and a second sliding chute 422 which are spaced in parallel, the first slider 430 and the second slider 440 are respectively arranged in the first sliding chute and the second sliding chute 422 in a sliding manner, the first slider 430 is connected with a second piston rod 413, and when the first slider 430 moves towards the pump plunger 300, the first slider 430 can drive the second slider 440 to synchronously slide;

the input end of the crank-slider structure 460 is connected to the second slider 440, the output end of the crank-slider structure is connected to the adjusting knob 471, the fourth elastic member 450 is installed between the second slider 440 and the mounting plate 420, and the fourth elastic member 450 makes the second slider 440 have a tendency to move in a direction away from the pump plunger 300;

when the second slider 440 moves towards the pump plunger 300, it can drive the adjusting knob 471 to rotate in the forward direction, and the flow rate of the hydraulic pump 470 is gradually reduced, and when the flow rate of the hydraulic pump 470 is reduced, the flow rate for pushing the first piston rod 412 is also reduced, so that the speed of the first piston rod 412 and the pump plunger 300 moving towards the supporting seat 200 is gradually reduced; when the first piston rod 412 drives the pump plunger 300 to move in a direction away from the supporting seat 200, the second slider 440 can be reset under the action of the fourth elastic member 450, at this time, the adjusting knob 471 reversely rotates, the flow rate of the hydraulic pump 470 is increased, and when the hydraulic pump 470 is increased, the flow rate for pushing the second piston rod 413 is also increased, so that the retraction speed of the first piston rod 412 is gradually increased.

In some embodiments of the present embodiment, in order to improve the efficiency of returning the first piston rod 412 and the pump plunger 300, a first dial 431 may be disposed on the first slider 430, and then a second dial 441, a fifth elastic member 442, a permanent magnet 443, an electromagnet 444, and a controller 490 may be disposed on the second slider 440, the fifth elastic member 442 may be installed between the second slider 440 and the second dial 441, the fifth elastic member 442 may make the second dial 441 have a tendency to move away from the second slider 440, the permanent magnet 443 may be installed on either the second slider 440 or the second dial 441, the electromagnet 444 may be installed on the other, the electromagnet 444 may be electrically connected to the controller 490, and the controller 490 may control the electromagnet 444 to be powered on or powered off.

When the hydraulic pump 470 is fed with oil to push the first piston rod 412 to move toward the supporting seat 200, the first slider 430 also moves toward the supporting seat 200, in this process, the first shifting block 431 abuts against the second shifting block 441, so that the second slider 440 overcomes the elastic force of the fourth elastic member 450 to move toward the supporting seat 200, the second slider 440 moves to drive the crank-slider mechanism 460 to move and drive the adjusting knob 471 to rotate in the forward direction, the closer the first piston rod 412 and the pump plunger 300 are to the supporting seat 200, the smaller the flow rate of the hydraulic pump 470 is, and the slower the moving speed of the pump plunger 300 is.

When the electromagnet 444 is powered on, the magnetic force applied to the second shifting block 441 by the electromagnet 444 is opposite to the elastic force applied to the second shifting block 441 by the fifth elastic element 442; by controlling the electromagnet 444 to be powered on or powered off, the second shifting block 441 can be enabled to leave or enter the moving path of the first shifting block 431. In the process that the pump plunger 300 moves towards the supporting seat 200, the electromagnet 444 can be powered off, and at the moment, the second shifting block 441 extends under the elastic force of the fifth elastic element 442 and can be abutted against the first shifting block 431; when the pump plunger 300 moves to the limit distance towards the supporting seat 200 and needs to move back, the electromagnet 444 can be powered on, at the moment, the second shifting block 441 overcomes the elastic force of the fifth elastic piece 442 to move back, the second shifting block 442 cannot abut against the first shifting block 431, the second sliding block 440 can move towards the direction departing from the supporting seat 200 under the elastic force action of the fourth elastic piece 450, the adjusting knob 471 rotates reversely at the moment, the flow of the hydraulic pump 470 is increased, the pump plunger 300 directly obtains the maximum moving speed, and the pump plunger 300 is quickly reset.

Further, a mounting hole may be provided in the second slider 440, the mounting hole being disposed toward the first runner 421, and the second dial 441, the fifth elastic member 442, the permanent magnet 443, and the electromagnet 444 may be disposed in the mounting hole.

In some embodiments of the present embodiment, the guide sleeve 500 is stepped, one side of the first end of the guide sleeve 500 abuts against the pump body 100, the other side of the first end of the guide sleeve 500 is spaced from the pump plunger 300, and the sealing structure 700 is located between the first end of the guide sleeve 500 and the pump plunger 300; one side of the second end of the guide sleeve 500 abuts against the pump plunger 300, the other side of the second end of the guide sleeve 500 is spaced apart from the pump body 100, and the first elastic member 600 is located between the second end of the guide sleeve 500 and the pump plunger 300.

In some embodiments of the present embodiment, the sealing structure 700 includes; the star-shaped ring 710 and the two flat washers 720, the star-shaped ring 710 is sleeved between the pump plunger 300 and the guide sleeve 500; the flat washer 720 is sleeved between the pump plunger 300 and the guide sleeve 500, and the star-shaped ring 710 is located between the two flat washers 720.

In this embodiment, the first elastic member 600, the second elastic member 920, the third elastic member 830, the fourth elastic member 450, and the fifth elastic member 442 may be springs, or the first elastic member 600, the second elastic member 920, the third elastic member 830, the fourth elastic member 450, and the fifth elastic member 442 may be made of other elastic materials such as rubber.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automotive plunger pump system, comprising:

the guide sleeve is sleeved between the pump plunger and the pump body;

the sealing structure is sleeved between the pump plunger and the guide sleeve;

the check valve structure comprises an end cap, a second elastic piece and a first steel ball, the end cap is installed on the pump body and is positioned on one side, away from the pump plunger, of the supporting seat, a third channel is arranged between the end cap and the supporting seat, the first steel ball is positioned at the first channel, the second elastic piece is positioned between the end cap and the first steel ball, and the second elastic piece enables the first steel ball to have a tendency of moving towards the supporting seat;

the driving device includes:

2. The automotive plunger pump system of claim 1, wherein a second steel ball is disposed in the retainer ring, the diameter of the second channel gradually decreases from the middle position to the two ends, the second steel ball is disposed in the second channel, the diameter of the second steel ball is smaller than the maximum diameter of the second channel, and the diameter of the second steel ball is larger than the minimum diameter of the second channel.

3. The automotive plunger pump system of claim 2, wherein a third resilient member is further disposed within the retainer ring, the third resilient member being mounted between the retainer ring and the second steel ball, the third resilient member tending to move the second steel ball toward the oil inlet.

4. The automotive plunger pump system of claim 3, wherein the second passage has a circular cross-section at an end facing the oil inlet and a rectangular cross-section at an end facing away from the oil inlet.

5. The automotive plunger pump system according to claim 1, wherein the first slider is provided with a first dial block, the second slider is provided with a second dial block, a fifth elastic member, a permanent magnet, an electromagnet and a controller, the fifth elastic member is installed between the second slider and the second dial block, the fifth elastic member makes the second dial block tend to be away from the second slider, the permanent magnet is installed on either the second slider or the second dial block, the electromagnet is installed on the other, the electromagnet is electrically connected with the controller, when the electromagnet is powered, the magnetic force applied to the second dial block by the electromagnet is opposite to the elastic force applied to the second dial block by the fifth elastic member; by controlling the electromagnet to be electrified or not electrified, the second shifting block can leave or enter the moving path of the first shifting block.

6. The plunger pump system for automobile of claim 5, wherein the second slider has a mounting hole disposed toward the first sliding slot, and the second shifting block, the fifth elastic member, the permanent magnet and the electromagnet are all disposed in the mounting hole.

7. The automotive plunger pump system according to claim 1, wherein the guide sleeve is stepped, one side of the first end of the guide sleeve abuts against the pump body, the other side of the first end of the guide sleeve is spaced from the pump plunger, and the sealing structure is located between the first end of the guide sleeve and the pump plunger; one side of the second end of the guide sleeve is abutted to the pump plunger, the other side of the second end of the guide sleeve is arranged at an interval with the pump body, and the first elastic piece is located between the second end of the guide sleeve and the pump plunger.

8. The automotive plunger pump system of claim 1, wherein the sealing structure comprises:

the star ring is sleeved between the pump plunger and the guide sleeve; and