Novel automobile brake adjusting plunger pump structure

Abstract

The utility model discloses a novel automobile brake adjusting plunger pump structure. The plunger pump comprises a shell, a pump front body, a pump sleeve, a plunger assembly, a plunger and an eccentric bearing. A pump sleeve is installed in an inner cavity of the plunger pump shell in a sealed mode, the inner cavity is divided into a front cavity and a rear cavity which are coaxially communicated through the pump sleeve, the plunger pump shell corresponding to the front cavity is provided with an oil outlet, the plunger pump shell corresponding to the rear cavity is provided with an oil inlet, and the front cavity and the rear cavity are communicated with the oil outlet and the oil inlet respectively. A pump front body is installed in the front cavity and connected with the pump sleeve through a one-way valve structure. A plunger assembly and a plunger are installed in the rear cavity, and the plunger penetrates out of the rear cavity and then is connected with the eccentric bearing. The plunger pump overcomes the defects in the prior art, the working efficiency of the plunger pump is improved, the service life of the plunger pump is prolonged, the oil pressure impact during working of the plunger pump is reduced, the performance of the plunger pump is improved, the service life of the plunger pump is prolonged, and the working noise of the plunger pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of product plunger pumps, in particular to a novel automobile brake regulating plunger pump structure. Background Art

[0002] The automobile brake adjustment plunger pump is a core component of the automobile electronic stability system (ESC). The plunger pump is widely used in the automobile brake system. It relies on the reciprocating motion of the plunger in the cylinder body to achieve oil suction and pressurization, thereby realizing the pressurization of the brake fluid stored in the accumulator back to the high-pressure circuit or pumping the liquid in the master cylinder oil cup to the wheel cylinder to achieve active pressurization, thereby realizing ABS, TCS, ACC and other functions. The working principle is: the motor drives the eccentric bearing (5) to rotate, and the eccentric bearing (5) causes the plunger assembly (3) to reciprocate along the plunger axis. The plunger pump sucks oil: when the plunger moves away from the center of the motor, the volume of the rear chamber increases, the pressure inside the rear chamber decreases, and the brake fluid enters the inner chamber through the one-way sealing ring check valve; the plunger pump pressurizes: when the plunger approaches the center of the motor, the volume of the rear chamber decreases, the pressure increases, the one-way sealing ring check valve closes, and the pressure inside the rear chamber continues to rise. When the pressure inside the rear chamber is greater than the pressure in the front, the front chamber check valve opens, and the brake fluid flows out through the front body of the pump. Its function is to pump the brake fluid generated by the decompression during ABS adjustment back to the master brake cylinder to provide power for ESC active boost.

[0003] The conventional ABS / ESC plunger pump often uses an O-ring or a star-shaped sealing ring as the sealing form. The sealing ring wears out and fails, resulting in a decrease in the performance of the plunger pump, and the service life cannot meet the current full-speed ACC (adaptive cruise control) function; when the conventional ABS / ESC plunger pump is working, there is friction between the outer diameter of the plunger (metal part) and the inner hole of the pump sleeve (2), and the plunger pump has a large working noise and cannot meet the noise requirements of electric motor vehicles; the rear chamber plunger check valve is a steel ball and the plunger (metal part) check valve port is not easy to seal. During use, the steel ball hits the check valve port, the valve port sealing surface wears, and the check valve is prone to failure, which reduces the performance of the plunger pump. During the ESC adjustment process, the wheel locks for a short time, and it is difficult to achieve active increase; the conventional ABS / ESC plunger pump front body (1) has only one oil guide groove and the oil flow area does not change. The existing plunger pump structure has a pulse elimination structure. During the ESC operation, the oil pressure impact at the plunger pump outlet is too large, resulting in a large working noise of the automobile electronic stability system (ESC), causing customer complaints. Utility Model Content

[0004] The utility model overcomes the shortcomings of the prior art, provides a novel automobile brake regulating plunger pump structure, improves the working efficiency of the plunger pump, increases the service life of the plunger pump, and reduces the oil pressure impact when the plunger pump is working.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model comprises a plunger pump including a housing and a pump front body, a pump sleeve, a plunger assembly, a plunger and an eccentric bearing in the housing; a pump sleeve is sealedly installed in the inner cavity of the plunger pump housing, and the inner cavity is divided into a front cavity and a rear cavity which are coaxially interconnected by the pump sleeve; an oil outlet is arranged in the plunger pump housing corresponding to the front cavity, and an oil inlet is arranged in the plunger pump housing corresponding to the rear cavity; the front cavity and the rear cavity are respectively connected with the oil outlet and the oil inlet; a pump front body is installed in the front cavity, and the pump front body and the pump sleeve are connected by a one-way valve structure; a plunger assembly and a plunger are installed in the rear cavity, and the plunger is connected with the eccentric bearing after passing through the rear cavity.

[0007] The one-way valve structure comprises a spring and a valve ball. The valve ball is installed in a conical valve port opened in the center of the front end face of the pump sleeve. The valve ball is connected to a blind hole in the center of the rear end face of the pump front body through the spring.

[0008] The plunger assembly comprises a one-way valve spring, a steel ball, a one-way valve sleeve, a one-way sealing ring and a plunger. The rear end of the one-way sealing ring is connected to the plunger. The one-way sealing ring is sleeved in an inner cavity opened at the rear end of the pump sleeve and is sealed and connected to the pump sleeve. A center hole is opened in the one-way sealing ring. The rear end of the center hole of the one-way sealing ring is connected to the liquid inlet via a channel inside the one-way sealing ring. The front end of the one-way sealing ring is connected to the rear end of the one-way valve sleeve. The front end of the one-way valve sleeve is elastically connected to the inner end face of the pump sleeve via a large spring. A one-way valve spring and a steel ball are installed in the one-way valve sleeve. Both ends of the one-way valve spring are respectively connected to the surface inside the rear end of the one-way valve sleeve and the steel ball. The steel ball is in close contact with the front hole end face of the center hole of the one-way sealing ring.

[0009] The one-way sealing ring comprises an oil inlet groove, a one-way valve port and a plunger sealing ring lip. An oil inlet groove is provided on the outer periphery of the center hole of the one-way sealing ring, and the oil inlet groove connects the rear end of the center hole of the one-way sealing ring with the liquid inlet; a one-way valve port with a conical surface is provided on the edge of the front hole end face of the center hole of the one-way sealing ring, and the one-way valve port is used to be in close contact with the steel ball; a plunger sealing ring lip is provided on the outer edge of the one-way sealing ring, and the plunger sealing ring lip is used to be in close contact with the inner wall of the pump sleeve to form a sealed connection.

[0010] The one-way valve sleeve has a through hole coaxial with the center hole of the one-way sealing ring at the supporting surface connected to the one-way valve spring. When the plunger pump starts pressurizing, high-pressure liquid flows through the through hole to pressurize the steel ball.

[0011] The one-way sealing ring is integrally formed by one-time injection molding and adopts self-lubricating polymer material.

[0012] The utility model structurally designs a pump front body with a two-stage oil guide groove, a one-way sealing ring integrated with a one-way valve port, a one-way lip self-lubricating polymer sealing ring, and a one-way valve sleeve with a center hole, thereby improving the performance and service life of the plunger pump and reducing the working noise of the plunger pump.

[0013] The beneficial effects of the utility model are:

[0014] The utility model designs a novel automobile brake regulating plunger pump: the pump front body has a two-stage oil guide groove, a one-way sealing ring integrated with a one-way valve port, a self-lubricating polymer one-way lip, and a one-way valve sleeve (33) is provided with a liquid inlet hole to improve the performance and service life of the plunger pump and reduce the working noise of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the plunger pump of the utility model;

[0016] Figure 2 It is a front view of the pump front body of the utility model;

[0017] Figure 3 It is a cross-sectional view of the pump front body of the utility model;

[0018] Figure 4 It is a schematic diagram of the plunger assembly of the utility model;

[0019] Figure 5 It is a cross-sectional view of the one-way sealing ring of the utility model;

[0020] Figure 6 It is a front view of the one-way sealing ring of the utility model;

[0021] Figure 7 It is a cross-sectional view of the one-way valve sleeve of the utility model;

[0022] Figure 8 It is a front view of the one-way valve sleeve of the utility model.

[0023] In the figure: a pump front body (1), a pump sleeve (2), a plunger assembly (3), a plunger (4), an eccentric bearing (5); an end surface oil guide groove (11), an annular groove (12), an axial oil guide groove (13); a check valve spring (31), a steel ball (32), a check valve sleeve (33), a check ring (34); an oil inlet groove (341), a check valve port (342), and a plunger seal ring lip (343). DETAILED DESCRIPTION

[0024] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0025] like Figure 1As shown, the plunger pump includes a housing and a pump front body 1, a pump sleeve 2, a plunger assembly 3, a plunger 4 and an eccentric bearing 5 in the housing; the pump sleeve 2 is sealed in the inner cavity of the plunger pump housing, and the inner cavity is divided into two coaxially interconnected front and rear cavities through the pump sleeve 2. The plunger pump housing corresponding to the front cavity is provided with an oil outlet, and the plunger pump housing corresponding to the rear cavity is provided with an oil inlet. The front cavity and the rear cavity are connected to the oil outlet and the oil inlet respectively; the pump front body 1 is installed in the front cavity, and the pump front body 1 and the pump sleeve 2 are connected through a one-way valve structure; the plunger assembly 3 and the plunger 4 are installed in the rear cavity, and the plunger 4 passes through the rear cavity and is connected to the external eccentric bearing 5. An oil filter is arranged between the inner wall of the rear cavity and the oil inlet.

[0026] The one-way valve structure includes a spring and a valve ball. The valve ball is installed in a conical valve port opened in the center of the front end face of the pump sleeve 2. The valve ball is connected to the blind hole in the center of the rear end face of the pump front body 1 through the spring. The spring provides pressure to the valve ball to achieve one-way sealing.

[0027] like Figure 2 and Figure 3 As shown, the rear end face of the pump front body 1 is provided with three end face oil guide grooves 11, one annular groove 12 and six axial oil guide grooves 13, one end of the three end face oil guide grooves 11 are all located at the center of the rear end face of the pump front body 1 and are connected together, the other ends of the three end face oil guide grooves 11 are all extended radially outward and are connected with the annular groove 12, six axial oil guide grooves 13 are provided on the outer periphery of the annular groove 12, and the six axial oil guide grooves 13 are evenly spaced along the circumference, wherein the three axial oil guide grooves 13 are respectively located in the same radial direction of the three end face oil guide grooves 11, and the annular groove 12 connects and communicates the end face oil guide groove 11 with the axial oil guide groove 13.

[0028] The high-pressure oil first enters the pump sleeve 2 from the liquid inlet, passes through the plunger assembly 3, and then enters the front chamber through the one-way valve structure between the pump sleeve 2 and the pump front body 1. The oil in the front chamber first enters the three end surface oil guide grooves 11 of the pump front body 1, and then the liquid passes through the annular groove 12 and enters the six axial oil guide grooves 13.

[0029] The total effective area of ​​all axial oil guide grooves 13 is larger than the opening area of ​​the one-way valve structure between the pump sleeve 2 and the pump front body 1, which can reduce the oil pressure pulsation during the operation of the plunger pump and reduce the working noise of the plunger.

[0030] like Figure 4As shown, the plunger assembly 3 includes a one-way valve spring 31, a steel ball 32, a one-way valve sleeve 33, a one-way sealing ring 34 and a plunger 4, the rear end of the one-way sealing ring 34 is connected to the plunger 4, the one-way sealing ring 34 is sleeved in the inner cavity opened at the rear end of the pump sleeve 2 and is sealed and connected to the pump sleeve 2; a center hole that axially penetrates front and back is opened in the one-way sealing ring 34, the rear end of the center hole of the one-way sealing ring 34 is connected to the liquid inlet through the channel inside the one-way sealing ring 34, and the front end penetrates through the one-way sealing ring 34; the front end of the one-way sealing ring 34 is clamped and connected to the rear end of the one-way valve sleeve 33, the front end of the one-way valve sleeve 33 is elastically connected to the inner end face of the pump sleeve 2 through the large spring, the one-way valve spring 31 and the steel ball 32 are installed in the rear end of the one-way valve sleeve 33, the two ends of the one-way valve spring 31 are respectively connected to the surface inside the rear end of the one-way valve sleeve 33 and the steel ball 32, and the steel ball 32 is in close contact with the front hole end face of the center hole of the one-way sealing ring 34.

[0031] In specific implementation, the steel ball 32 and the one-way sealing ring 34 form a one-way valve, the one-way valve sleeve 33 provides support for the one-way valve spring 31, and the one-way valve spring 31 provides pressure to seal the valve port of the one-way valve for the steel ball 32. The one-way valve sleeve 33 provides support for the one-way valve spring 31, and the plunger 4 and the one-way sealing ring 34 are interference connected.

[0032] like Figure 5 and Figure 6 As shown, the one-way sealing ring 34 includes an oil inlet groove 341, a one-way valve port 342 and a plunger sealing ring lip 343. The outer periphery of the center hole of the one-way sealing ring 34 is provided with an oil inlet groove 341 as a passage inside the one-way sealing ring 34. The oil inlet groove 341 connects the rear end of the center hole of the one-way sealing ring 34 with the liquid inlet. In a specific implementation, three oil inlet grooves 341 may be provided, and the three oil inlet grooves 341 are arranged at intervals along the circumferential direction.

[0033] In a specific implementation, the steel ball 32 and the one-way valve port 341 form a one-way valve, the oil from the oil inlet enters the rear cavity through the one-way valve of the oil inlet groove, and the outer diameter of the sealing lip port 342 forms a seal with the inner hole of the pump sleeve.

[0034] A conical one-way valve port 342 is provided at the front hole end edge of the center hole of the one-way sealing ring 34, and the one-way valve port 342 is used to be in close contact with the steel ball 32; a plunger sealing ring lip 343 is provided at the outer edge of the one-way sealing ring 34, and the plunger sealing ring lip 343 is used to be in close contact with the inner wall of the pump sleeve 2 to form a sealed connection.

[0035] Moreover, an annular groove is provided between the plunger sealing ring lip 343 of the one-way sealing ring 34 and the one-way valve port 342. The plunger sealing ring lip 343 and the inner surface of the pump sleeve 2 have a line contact interference fit, and the outer diameter of the sealing lip 342 is increased when the plunger is pressurized, which is more conducive to sealing.

[0036] like Figure 7 and Figure 8As shown, the one-way valve sleeve 33 is provided with a through hole coaxial with the center hole of the one-way sealing ring 34 at the supporting surface connected to the one-way valve spring 31. When the plunger pump starts to pressurize, high-pressure liquid flows through the through hole to pressurize the steel ball 32, so that the plunger one-way valve is quickly closed, thereby improving the efficiency of the plunger pump and improving the working efficiency of the plunger pump.

[0037] In the specific implementation, the oil enters the rear oil inlet, enters the rear cavity after being filtered by the oil filter, enters the center hole of the one-way sealing ring 34 through the oil inlet groove 341, and then pushes the steel ball 32 away from the one-way valve port 342 by the oil pressure to open the one-way valve of the plunger assembly 3, so that the oil enters the one-way valve sleeve 33, and then enters the inner cavity opened at the rear end of the pump sleeve 2 through the through hole of the one-way valve sleeve 33, and finally enters the front cavity through the tapered through hole in the center of the front end face of the pump sleeve 2.

[0038] The utility model combines the existing multiple leather cups into a sealing ring structure, so as to form an integrated sealing structure rather than a separate structure, which can be easily formed without having to process the notches in the sealing ring multiple times, thus avoiding the problems and defects caused by the existing machining.

[0039] Moreover, the combination with self-lubricating polymer materials can work together to improve the performance and service life of the plunger pump and reduce the operating noise of the plunger pump.

[0040] The one-way seal ring 34 is integrally formed by one-step injection molding and is made of self-lubricating polymer material. The self-lubricating polymer material reduces the resistance between the one-way seal ring 4 and the pump sleeve 2 when the plunger pump is working, thereby improving the working efficiency and service life of the plunger pump.

[0041] The one-way sealing ring 34 is integrated with a one-way valve port 342. The one-way valve port 342 and the steel ball 32 cooperate to form a one-way valve, which can easily form a sealing belt at the one-way valve port 342, reduce the time to close the one-way valve, improve the sealing performance, and improve the performance of the plunger pump.

[0042] At the same time, the one-way sealing ring 34 is integrated with a plunger sealing ring lip 343, and the plunger sealing ring lip 343 and the inner surface of the pump sleeve 2 have a line contact interference fit, so that the outer surface of the one-way sealing ring 34 and the inner surface of the pump sleeve 2 are gap-matched, which reduces the friction between the one-way sealing ring 34 and the inner surface of the pump sleeve 2, and the ejection speed is faster, thereby increasing the oil intake speed, which is beneficial to improving the performance and service life of the plunger pump;

[0043] The one-way sealing ring 34 of the utility model is made of self-lubricating polymer material, which has a lower friction coefficient and better wear resistance than the existing rubber material, and can also improve the performance and service life of the plunger pump and reduce the working noise of the plunger pump.

[0044] The three oil inlet grooves 341 of the one-way sealing ring 34 increase the liquid inlet amount. It is interference fit with the plunger 4 to form an integral whole. It has a higher hardness than the rubber material and the self-lubricating polymer material. It reduces the liquid consumed by the sealing ring due to deformation caused by the increase of the rear chamber pressure when the plunger pump is pressurized, thereby improving the working efficiency of the plunger pump.

[0045] The working process of the utility model is as follows:

[0046] When the plunger pump is pressurized, the check valve port 342 and the steel ball 32 cooperate to form a check valve, which is easy to form a sealing belt at the check valve port 342, and the time for the steel ball 32 to close the check valve port 342 is reduced; the one-way seal ring 34 has a plunger seal ring lip 343 and the inner surface of the pump sleeve 2 with line contact interference fit, and the outer surface of the one-way seal ring 34 and the inner surface of the pump sleeve 2 are in clearance fit, which reduces the friction between the plunger seal ring 34 and the inner surface of the pump sleeve 32, so that the plunger pump can absorb oil faster. The plunger one-way seal ring 34 is made of self-lubricating polymer material. Compared with rubber seal material, lubricating polymer material has the characteristics of low friction coefficient and good wear resistance, which increases the service life and reduces the working noise; the three end surface oil guide grooves 11 of the pump front body, and the liquid passes through the annular groove 12 and enters the six axial oil guide grooves 13. The effective area of ​​the oil guide groove is larger than the area where the check valve is opened, which reduces the oil pressure pulsation during the plunger pump process and reduces the working noise of the plunger.

[0047] It can be seen from the implementation that the utility model can provide high plunger pump performance, reduce the working noise of the plunger pump, effectively improve the smoothness of ESC operation, and reduce the working noise of ESC.

[0048] The above is an embodiment of the present invention. The present invention is not limited to the above embodiments, and anyone should be aware that any structural changes made under the enlightenment of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention.

Claims

1. A novel automobile brake regulating plunger pump structure, characterized in that: The plunger pump comprises a housing and a pump front body (1), a pump sleeve (2), a plunger assembly (3), a plunger (4) and an eccentric bearing (5) in the housing; the pump sleeve (2) is sealedly installed in the inner cavity of the plunger pump housing, and the inner cavity is divided into two coaxially interconnected front and rear cavities by the pump sleeve (2); the plunger pump housing corresponding to the front cavity is provided with an oil outlet, and the plunger pump housing corresponding to the rear cavity is provided with an oil inlet, and the front cavity and the rear cavity are respectively connected to the oil outlet and the oil inlet; the pump front body (1) is installed in the front cavity, and the pump front body (1) and the pump sleeve (2) are connected via a one-way valve structure; the plunger assembly (3) and the plunger (4) are installed in the rear cavity, and the plunger (4) is connected to the eccentric bearing (5) after passing through the rear cavity; The plunger assembly (3) comprises a one-way valve spring (31), a steel ball (32), a one-way valve sleeve (33), a one-way sealing ring (34) and a plunger (4); the rear end of the one-way sealing ring (34) is connected to the plunger (4); the one-way sealing ring (34) is sleeved in an inner cavity opened at the rear end of the pump sleeve (2) and is sealed and connected to the pump sleeve (2); a center hole is opened in the one-way sealing ring (34); the rear end of the center hole of the one-way sealing ring (34) is connected to the inner channel and the inlet of the one-way sealing ring (34). The front end of the one-way sealing ring (34) is connected to the rear end of the one-way valve sleeve (33), the front end of the one-way valve sleeve (33) is elastically connected to the inner end surface of the pump sleeve (2) via a large spring, a one-way valve spring (31) and a steel ball (32) are installed in the one-way valve sleeve (33), the two ends of the one-way valve spring (31) are respectively connected to the surface inside the rear end of the one-way valve sleeve (33) and the steel ball (32), and the steel ball (32) is in close contact with the front hole end surface of the center hole of the one-way sealing ring (34).

2. A novel automobile brake regulating plunger pump structure according to claim 1, characterized in that: The one-way valve structure comprises a spring and a valve ball. The valve ball is installed in a conical valve port opened in the center of the front end face of the pump sleeve (2). The valve ball is connected to a blind hole in the center of the rear end face of the pump front body (1) via the spring.

3. The novel automobile brake regulating plunger pump structure according to claim 1 is characterized in that: The one-way sealing ring (34) comprises an oil inlet groove (341), a one-way valve port (342) and a plunger sealing ring lip (343); the outer periphery of the center hole of the one-way sealing ring (34) is provided with an oil inlet groove (341); the oil inlet groove (341) connects the rear end of the center hole of the one-way sealing ring (34) with the liquid inlet; A conical one-way valve port (342) is provided at the front hole end face edge of the center hole of the one-way sealing ring (34), and the one-way valve port (342) is used to be in close contact with the steel ball (32); a plunger sealing ring lip (343) is provided at the outer edge of the one-way sealing ring (34), and the plunger sealing ring lip (343) is used to be in close contact with the inner wall of the pump sleeve (2) to form a sealed connection.

4. The novel automobile brake regulating plunger pump structure according to claim 1 is characterized in that: The one-way valve sleeve (33) is provided with a through hole coaxial with the center hole of the one-way sealing ring (34) at the supporting surface connected to the one-way valve spring (31). When the plunger pump starts pressurizing, high-pressure liquid flows through the through hole to pressurize the steel ball (32).

5. The novel automobile brake regulating plunger pump structure according to claim 1 is characterized in that: The one-way sealing ring (34) is integrally formed by one-step injection molding and is made of a self-lubricating polymer material.

Images