CN221482146U - Plunger pump for ESC - Google Patents

Abstract

The utility model discloses a plunger pump for an ESC, which comprises an oil outlet valve assembly, wherein the oil outlet valve assembly comprises a supporting seat, the supporting seat is fixedly connected with a plunger sleeve, a first cavity is formed in the supporting seat, a second cavity is formed in the plunger sleeve, a first oil passage hole is formed in the plunger sleeve, the first cavity and the second cavity are communicated through the first oil passage hole, a conical hole is formed in one side, close to the first cavity, of the plunger sleeve, a first spring is fixedly connected in the first cavity, a blocking piece is abutted to the first spring, and the opening angle of the conical hole is 60 degrees; the oil inlet valve assembly is located the second cavity, fixedly connected with second spring in the second cavity, second spring and oil inlet valve assembly butt, plunger sleeve fixedly connected with fixed cover, set up the third cavity in the fixed cover, wear to be equipped with the plunger body on the fixed cover, the plunger body is connected with oil inlet valve assembly transmission. The opening angle of the conical hole is 60 degrees, so that liquid disturbance can be reduced, NVH performance is improved, and customer complaints are reduced.

Description

Plunger pump for ESC

Technical Field

The utility model relates to the field of plunger pumps, in particular to a plunger pump for an ESC.

Background

ESCs (electronic stability control systems for automotive chassis) are systems that can improve vehicle stability by detecting and reducing traction losses (slip). When the ESC detects that the steering control is lost, the ESC automatically applies the brake to help a driver to 'steer' a vehicle which wants to run, and the ESC is a main current active safety control system for the chassis of the automobile at home and abroad.

The braking force of the system in the working process mainly comes from a pressure building unit, and the pressure building unit is realized by adding two plunger pumps to a motor. When the system detects that the wheel end needs to apply braking or release braking force, the motor is started at the moment to drive the plunger pump to repeatedly move, so that the brake fluid is conveyed from low pressure to high pressure. During the reciprocating motion of the plunger pump, noise problems caused by mechanical impact and hydraulic disturbance can exist, if the design is not reasonable, mechanical or hydraulic fluctuation in the working process can be directly connected to the driver end of the front cabin through a transmission path, and customer complaints of NVH exist. For this purpose, a plunger pump for ESC has been proposed to solve the above problems.

Disclosure of utility model

The utility model aims to provide a plunger pump for ESC, which solves the problems in the prior art, reduces the noise problem and reduces the complaints of NVH customers.

In order to achieve the above object, the present utility model provides the following solutions: the utility model provides a plunger pump for ESC, comprising:

The oil outlet valve assembly comprises a supporting seat, wherein the supporting seat is fixedly connected with a plunger sleeve, a first cavity is formed in the supporting seat, a second cavity is formed in the plunger sleeve, a first oil passage hole is formed in the plunger sleeve, the first cavity and the second cavity are communicated through the first oil passage hole, a first oil outlet hole is formed in the first cavity, a conical hole is formed in one side, close to the first cavity, of the plunger sleeve, the conical hole and the first oil passage hole are concentrically arranged, a first spring is fixedly connected in the first cavity, a blocking piece is abutted to the first spring, the blocking piece is abutted to the conical hole, the opening angle of the conical hole is 60 degrees, and the diameter of the first oil passage hole is 2.5mm;

The oil inlet valve assembly is located in the second cavity, a second spring is fixedly connected in the second cavity, the second spring is in butt joint with the oil inlet valve assembly, the plunger sleeve is far away from a fixed sleeve fixedly connected with one end of the supporting seat, a third cavity is arranged in the fixed sleeve, a plunger body penetrates through the fixed sleeve, the plunger body is connected with a power source in a transmission mode, and the plunger body is connected with the oil inlet valve assembly in a transmission mode.

Preferably, the plugging piece is a plugging piece, the plugging piece comprises a cylinder, one end of the cylinder is provided with a conical body which is fixedly connected with, one end of the cylinder, which is far away from the conical body, is fixedly connected with a fixing block, the conical body is abutted to the conical hole, the cylinder is fixedly connected with the first spring, the fixing block is positioned in the first spring, and a plurality of grooves are formed in the outer edge of the cylinder.

Preferably, the oil inlet valve assembly comprises a sealing element, the sealing element is in butt joint with the second spring, sealing element sliding connection is in the second cavity, fifth cavity has been seted up to the sealing element, sealing element fixedly connected with disk seat, the disk seat with plunger body fixed connection, the disk seat is located in the third cavity, a plurality of first inlet port and second oil outlet have been seted up on the disk seat, set up the fourth cavity in the disk seat, first inlet port with second oil outlet all with fourth cavity intercommunication, be provided with movable closing mechanism in the fifth cavity, movable closing mechanism with second oil outlet butt, set up the second inlet port on the fixed cover, the second inlet port with third cavity intercommunication, fifth cavity with the second cavity passes through the connecting hole intercommunication.

Preferably, the movable opening and closing mechanism comprises a third spring, the third spring is fixedly connected in the fifth cavity, a second steel ball is fixedly connected to the third spring, and the second steel ball is abutted to the second oil outlet.

Preferably, the fixed sleeve is far away from one end of the plunger sleeve and is fixedly connected with a sealing ring, and one end of the sealing ring far away from the fixed sleeve is fixedly connected with a supporting ring.

Preferably, the second oil inlet is fixedly connected with a filter screen.

Preferably, the blocking piece is a first steel ball, the first steel ball is fixedly connected with the first spring, and the first steel ball is located in the conical hole.

The utility model discloses the following technical effects: the power source drives the plunger body to move, in the oil outlet process, the plunger body can drive the oil inlet valve assembly to move, the oil inlet valve assembly can move in the second cavity, the space in the second cavity can be reduced, oil in the second cavity is extruded, the second spring can be compressed simultaneously, oil in the second cavity can outwards flow through the first oil duct hole, the oil can push the blocking piece to move due to the fact that the blocking piece is arranged at the conical hole, the blocking piece can compress the first spring, so that the oil enters the first cavity, flows out through the first oil outlet, after the oil outlet process is finished, the plunger body can reversely move, the second spring can enable the oil inlet valve assembly to reversely move, at the moment, the space in the second cavity can be enlarged, the internal oil pressure can be reduced, the blocking piece can restore to the original position under the action of the first spring, at the moment, the external oil can enter the second cavity through the oil inlet valve assembly, and the oil inlet process is achieved. The opening angle of the conical hole is 60 degrees, so that liquid disturbance can be reduced, NVH performance is improved, and customer complaints are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a plunger pump for ESC in embodiment 1 of the present utility model;

FIG. 2 is a schematic diagram of a plugging block structure according to the present utility model;

FIG. 3 is a schematic structural diagram of embodiment 2 of the present utility model;

FIG. 4 is a schematic view of the structure of the first steel ball in the tapered hole;

1, a supporting seat; 2. a first cavity; 3. a second cavity; 4. a plunger sleeve; 5. a first oil passage hole; 6. a tapered bore; 7. a first spring; 8. a second spring; 9. a fixed sleeve; 10. a third cavity; 11. a plunger body; 12. a first steel ball; 13. a block; 14. a cylinder; 15. a cone; 16. a fixed block; 17. a groove; 18. a seal; 19. a valve seat; 20. a first oil inlet hole; 21. a second oil outlet hole; 22. a fourth cavity; 23. a second oil inlet hole; 24. a third spring; 25. a second steel ball; 26. a seal ring; 27. a support ring; 28. a filter screen; 29. and a fifth cavity.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Example 1

Referring to fig. 1-2, the present utility model provides a plunger pump for ESC, comprising:

The oil outlet valve assembly comprises a supporting seat 1, wherein a plunger sleeve 4 is fixedly connected to the supporting seat 1, a first cavity 2 is formed in the supporting seat 1, a second cavity 3 is formed in the plunger sleeve 4, a first oil passage hole 5 is formed in the plunger sleeve 4, the first cavity 2 and the second cavity 3 are communicated through the first oil passage hole 5, a first oil outlet hole is formed in the first cavity 2, a conical hole 6 is formed in one side, close to the first cavity 2, of the plunger sleeve 4, the conical hole 6 is concentrically arranged with the first oil passage hole 5, a first spring 7 is fixedly connected in the first cavity 2, a blocking piece is abutted to the first spring 7, the blocking piece is abutted to the conical hole 6, the opening angle of the conical hole 6 is 60 degrees, and the diameter of the first oil passage hole 5 is 2.5mm;

The oil inlet valve assembly is located in the second cavity 3, the second spring 8 is fixedly connected in the second cavity 3, the second spring 8 is in butt joint with the oil inlet valve assembly, the plunger sleeve 4 is far away from the fixed sleeve 9 of supporting seat 1 one end fixedly connected with, the third cavity 10 has been seted up in the fixed sleeve 9, the third cavity 10 communicates with the second cavity 3, wear to be equipped with plunger 11 on the fixed sleeve 9, plunger 11 is connected with the power supply transmission, plunger 11 is connected with the oil inlet valve assembly transmission.

In this device, the power supply is the motor, the motor is connected with plunger 11 transmission, plunger 11 motion, second spring 8 and oil feed valve subassembly butt, supporting seat 1 provides the support, first spring 7 is used for propping up stifled piece, at the in-process of delivery, plunger 11 can drive oil feed valve subassembly motion, oil feed valve subassembly can remove in second cavity 3, the space in second cavity 3 can diminish, the fluid in second cavity 3 can compress second spring 8 simultaneously, fluid in second cavity 3 can outwards flow through first oil duct hole 5, bell mouth 6 and first oil duct hole 5 intercommunication, because the stifled piece is in bell mouth 6 departments, fluid can promote stifled piece removal, the stifled piece can compress first spring 7, thereby make fluid get into in the first cavity 2, the rethread first oil outlet flows, after the completion of delivery process, plunger 11 can reverse movement, second spring 8 can promote oil feed valve subassembly reverse movement, the space in the second cavity 3 can diminish, inside fluid pressure can be through first oil duct hole 5 outwards flow, the bell mouth 6 and the effect of stifled piece can be in the inside the first spring 6 under the effect at this moment, the inside cone mouth 6 can get into the external process of delivery through the first valve, the inside the valve can be realized to the inside the cone mouth of the valve. The opening angle of the conical hole 6 is 60 degrees, so that the stability of the steel ball lifting process can be improved, the liquid disturbance is reduced, and the NVH performance is improved

According to a further optimization scheme, the blocking piece is a blocking block 13, the blocking block 13 comprises a cylinder 14, one end of the cylinder 14 is provided with a conical body 15 which is fixedly connected with, one end of the cylinder 14, which is far away from the conical body 15, is fixedly connected with a fixing block 16, the conical body 15 is in butt joint with the conical hole 6, the cylinder 14 is fixedly connected with the first spring 7, the fixing block 16 is located in the first spring 7, and the outer edge of the cylinder 14 is provided with a plurality of grooves 17.

The conical body 15 is blocked at the position of the conical hole 6, the first spring 7 is abutted with the cylinder 14, the fixed block 16 is arranged in the end head of the first spring 7, so that the connection between the first spring 7 and the cylinder 14 is more stable, the groove 17 is convenient for oil to pass through, and the size of the cylinder 14 is smaller than that of the first cavity 2; the cone 15 and cylinder 14 eliminate turbulence of the liquid.

Further optimizing scheme, the oil inlet valve assembly includes sealing member 18, sealing member 18 and second spring 8 butt, sealing member 18 sliding connection is in second cavity 3, fifth cavity 29 has been seted up to sealing member 18, sealing member 18 fixedly connected with disk seat 19, disk seat 19 and plunger body 11 fixed connection, disk seat 19 is located third cavity 10, a plurality of first inlet port 20 and second oil outlet 21 have been seted up on the disk seat 19, fourth cavity 22 has been seted up in the disk seat 19, first inlet port 20 and second oil outlet 21 all communicate with fourth cavity 22, be provided with movable closing mechanism in the fifth cavity 29, movable closing mechanism and second oil outlet 21 butt have been seted up second inlet port 23 on the fixed cover 9, second inlet port 23 and third cavity 10 intercommunication, fifth cavity 29 and second cavity 3 pass through the connecting hole intercommunication.

The sealing element 18 slides in the second cavity 3, the plunger 11 drives the valve seat 19 to move, the valve seat 19 drives the sealing element 18 to move, oil enters the fourth cavity 22 through the second oil inlet hole 23 and the first oil inlet hole 20, in the oil inlet process, the plunger 11 drives the valve seat 19 and the sealing element 18 to move, so that the space in the second cavity 3 is enlarged, at the moment, the oil enters the fourth cavity 22, the movable opening and closing mechanism is opened, the oil enters the fifth cavity 29, and then enters the second cavity 3 through the connecting hole, so that the oil inlet process is completed, in the oil outlet process, the plunger 11 pushes the valve seat 19 and the sealing element 18 to move, the sealing element 18 compresses the space of the second cavity 3, so that the space of the second cavity 3 is reduced, and the internal oil pressure is increased.

Further optimizing scheme, movable opening and closing mechanism includes third spring 24, and third spring 24 fixed connection is in fifth cavity 29, and fixedly connected with second steel ball 25 on the third spring 24, second steel ball 25 and second oil outlet 21 butt.

During oil feeding, the oil can prop up the second steel ball 25, and during oil discharging, the second steel ball 25 can block the second oil outlet 21 under the action of the third spring 24.

In a further optimized scheme, a sealing ring 26 is fixedly connected to one end, away from the plunger sleeve 4, of the fixing sleeve 9, and a supporting ring 27 is fixedly connected to one end, away from the fixing sleeve 9, of the sealing ring 26.

The seal ring 26 plays a role in sealing, and the support ring 27 plays a role in supporting.

Further optimizing scheme, the second oil inlet hole 23 is fixedly connected with a filter screen 28.

The filter screen 28 is used for filtering impurities in the oil.

The working principle of the device is as follows: the motor drives the plunger body 11 to move, in the oil discharging process, the plunger body 11 can push the valve seat 19 and the sealing piece 18 to move, the sealing piece 18 can compress the space of the second cavity 3, so that the space of the second cavity 3 is reduced, the internal oil pressure is increased, the conical body 15 and the cylinder 14 are pushed by the oil pressure increase, the first spring 7 is also compressed, the first oil passage hole 5 and the conical hole 6 are unblocked, the oil flows into the first cavity 2, and the oil discharging process is completed; in the oil feeding process, the plunger 11 drives the valve seat 19 and the sealing element 18 to move, so that the space in the second cavity 3 is increased, the conical hole 6 is blocked by the conical body 15 and the cylindrical body 14 under the action of the first spring 7, external oil enters the fourth cavity 22 through the second oil inlet 23 and the first oil inlet 20, and the oil pressure in the fifth cavity 29 and the second cavity 3 is reduced, so that the oil in the fourth cavity 22 can push the second steel ball 25, and the oil can enter the fifth cavity 29 through the second oil outlet 21, thereby completing the oil feeding process.

Example 2

Referring to fig. 3 to 4, this embodiment is different from embodiment 1 in that: the blocking piece is a first steel ball 12, the first steel ball 12 is fixedly connected with the first spring 7, and the first steel ball 12 is positioned in the conical hole 6.

The first steel ball 12 is blocked in the conical hole 6, and after the first steel ball 12 enters the conical hole 6, the first steel ball 12 is 2.2mm higher than the end face of the plunger sleeve.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims (7)

1. A plunger pump for an ESC, comprising:

The oil outlet valve assembly comprises a supporting seat (1), wherein the supporting seat (1) is fixedly connected with a plunger sleeve (4), a first cavity (2) is formed in the supporting seat (1), a second cavity (3) is formed in the plunger sleeve (4), a first oil passage hole (5) is formed in the plunger sleeve (4), the first cavity (2) and the second cavity (3) are communicated through the first oil passage hole (5), a first oil outlet hole is formed in the first cavity (2), a conical hole (6) is formed in one side, close to the first cavity (2), of the plunger sleeve (4), the conical hole (6) is concentrically arranged with the first oil passage hole (5), a first spring (7) is fixedly connected in the first cavity (2), a blocking piece is abutted to the first spring (7), the blocking piece is abutted to the conical hole (6), and the opening angle of the blocking piece is 60.5 mm;

The oil inlet valve assembly is located in the second cavity (3), a second spring (8) is fixedly connected in the second cavity (3), the second spring (8) is in butt joint with the oil inlet valve assembly, the plunger sleeve (4) is far away from a fixed sleeve (9) fixedly connected with one end of the supporting seat (1), a third cavity (10) is formed in the fixed sleeve (9), a plunger body (11) is arranged on the fixed sleeve (9) in a penetrating mode, the plunger body (11) is connected with a power source in a transmission mode, and the plunger body (11) is connected with the oil inlet valve assembly in a transmission mode.

2. The plunger pump for ESC according to claim 1, wherein: the blocking piece is a blocking block (13), the blocking block (13) comprises a cylinder (14), a conical body (15) is fixedly connected to one end of the cylinder (14), the cylinder (14) is far away from the conical body (15), a fixed block (16) is fixedly connected to one end of the conical body (15), the conical body (15) is in butt joint with the conical hole (6), the cylinder (14) is fixedly connected with the first spring (7), the fixed block (16) is located in the first spring (7), and a plurality of grooves (17) are formed in the outer edge of the cylinder (14).

3. The plunger pump for ESC according to claim 1, wherein: the oil inlet valve assembly comprises a sealing element (18), the sealing element (18) is in butt with a second spring (8), sealing element (18) sliding connection is in the second cavity (3), fifth cavity (29) have been seted up to sealing element (18), sealing element (18) fixedly connected with disk seat (19), disk seat (19) with plunger body (11) fixed connection, disk seat (19) are located in third cavity (10), a plurality of first inlet port (20) and second outlet port (21) have been seted up on disk seat (19), fourth cavity (22) have been seted up in disk seat (19), first inlet port (20) with second outlet port (21) all with fourth cavity (22) intercommunication, be provided with movable opening and closing mechanism in fifth cavity (29) with second opening and closing mechanism oil outlet port (21) butt, set up on fixed cover (9) inlet port (23) second inlet port (23) and third cavity (29) intercommunication.

4. A plunger pump for ESC according to claim 3, characterized in that: the movable opening and closing mechanism comprises a third spring (24), the third spring (24) is fixedly connected in the fifth cavity (29), a second steel ball (25) is fixedly connected to the third spring (24), and the second steel ball (25) is abutted to the second oil outlet (21).

5. The plunger pump for ESC according to claim 1, wherein: the fixed sleeve (9) is far away from plunger sleeve (4) one end fixedly connected with sealing washer (26), sealing washer (26) are kept away from fixed sleeve (9) one end fixedly connected with support ring (27).

6. The plunger pump for ESC according to claim 4, wherein: and a filter screen (28) is fixedly connected to the second oil inlet hole (23).

7. The plunger pump for ESC according to claim 1, wherein: the blocking piece is a first steel ball (12), the first steel ball (12) is fixedly connected with the first spring (7), and the first steel ball (12) is positioned in the conical hole (6).