pressure building unit

Abstract

The utility model belongs to hydraulic pressure building unit technical field, concretely relates to a pressure building unit that long life and pressure building ability are good, the utility model has carried out the improvement to the piston body among pressure building unit, has set up piston body alone as the pressure building unit's pressure building component, and has integrated the support plate and support bottom plate on the piston body, the installation of second valve ball and support spring is convenient, and the piston body adopts polyether ether ketone material processing, guarantees the leakproofness between piston body and cavity, simultaneously makes piston body can satisfy high temperature high pressure's use environment.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic pressure building unit, specifically relating to a pressure building unit with long service life and good pressure building capability. Background Technology

[0002] With social development and the improvement of people's living standards, more and more families are choosing to buy one or more two-wheeled vehicles for daily travel and leisure. However, most vehicles are only equipped with basic braking systems, such as front and rear linked braking systems (CBS) or single-wheel anti-lock braking systems (ABS). These three types of braking cannot fundamentally solve the problem of wheel lock-up and loss of control, or they can only prevent wheel lock-up. Furthermore, these products have slow braking response and poor braking effect; if the driver misoperates, wheel lock-up can also occur. They cannot meet the needs of active driving and active control.

[0003] Chinese Patent 202211081096X, entitled "A Plunger Pump for an Automotive Electronic Stability Control System," discloses a plunger mechanism comprising a plunger rod and a plunger ring fixedly mounted on the plunger rod. The plunger ring divides the plunger cavity into an oil supply cavity and a pressure-building cavity. The pump body is provided with an inlet for the oil supply cavity to draw in brake fluid. In this design, the plunger ring, as a pressure-building component that cooperates with the plunger cavity, is prone to wear. Furthermore, a plunger return spring is required to assist in the installation of the first spring and the first steel ball, making assembly difficult. The pump also has numerous components, and the plunger ring is equipped with an oil inlet and other adjustment structures, resulting in high replacement and maintenance costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention improves the piston body in the pressure building unit by setting up a separate piston body as the pressure building component of the pressure building unit. Furthermore, a support plate and a support base plate are integrated into the piston body to facilitate the installation of the second valve ball and the support spring. The piston body is made of polyetheretherketone material, which ensures the sealing between the piston body and the cavity, and enables the piston body to meet the requirements of high temperature and high pressure operating environments.

[0005] The technical solution of this utility model is as follows:

[0006] A pressure building unit includes a valve body with at least one mounting cavity and a drive through-hole communicating with the mounting cavity. It also includes a base disposed within the mounting cavity, the base having a cavity open at one end along its axis, and a first valve hole communicating with the cavity at the other end. An outlet check valve assembly is provided at the tail of the mounting cavity. The unit further includes a piston body fitted within the cavity, the piston body having a connecting through-hole along its axis. It also includes a suction support seat, one end of which engages with the connecting through-hole, and the other end of which connects to a plunger. The plunger is assembled within the drive through-hole. A second valve hole is provided at the end of the suction support seat that engages with the piston body, and an oil inlet channel communicating with the second valve hole is provided on the side wall of the suction support seat. Support plates are provided on the piston body around the connecting through hole, and liquid outlet gaps are formed between adjacent support plates. A support base plate is provided at the other end of the support plate. The second valve ball is located in the connecting through hole of the piston body and cooperates with the second valve hole. It also includes a support spring, with both ends of the support spring connected to the support base plate and the second valve ball respectively. It also includes a plunger return spring, which is located in the cavity. One end of the plunger return spring is connected to the piston body around the support plate, and the other end is connected to the wall of the cavity around the first valve hole. This utility model sets the piston body separately as the pressure building component of the pressure building unit, and realizes the integration of the support plate and support base plate structure, which is convenient for assembly. At the same time, it realizes the single function of the components and reduces the production cost of the components.

[0007] It also includes a ring filter assembly, which includes a ring filter housing disposed in the mounting cavity. One end of the ring filter housing is provided with a ring filter through hole for the plunger to pass through, and the other end of the ring filter housing is connected to the base. A filter component is provided on the circumferential surface of the ring filter housing. The ring filter assembly is used to filter foreign objects and prevent foreign objects from entering the cavity of the base and causing damage to the piston body.

[0008] The filter assembly consists of several filter holes arranged on the circumferential surface of the filter housing.

[0009] The filter assembly is a metal filter screen plate integrally injection molded with the ring filter housing.

[0010] The piston body includes a piston ring body, and a sealing ring body is provided on the outer periphery of the piston ring body. One axial end of the sealing ring body is connected to the piston ring body, and the other axial end of the sealing ring body is suspended. The outer wall surface of the sealing ring body is in close contact with the wall surface of the cavity.

[0011] The piston body is made of polyetheretherketone.

[0012] A slip ring is provided inside the drive through hole, and the plunger reciprocates within the slip ring. The slip ring reduces the wear of the plunger.

[0013] The slip ring is made of polyetheretherketone.

[0014] A star-shaped sealing ring is also provided in the mounting cavity at the end of the slip ring, and the star-shaped sealing ring cooperates with the plunger.

[0015] The outlet check valve assembly includes an outlet check valve base connected to the end of the mounting cavity. The outlet check valve base has a recess, and a first spring and a first valve ball are provided in the recess. The first valve ball cooperates with a first valve hole.

[0016] In summary, this utility model has the following beneficial effects:

[0017] This invention uses a piston body as the pressure-building component of a pressure-building unit. During the operation of the pressure-building unit, the piston body moves back and forth within the cavity to establish high pressure. During operation, only the piston body rubs against the cavity, making subsequent replacement and maintenance convenient and cost-effective. Furthermore, by placing the support plate and support base plate on the piston body and integrating them with the piston body, the assembly of the support spring and the second valve ball is facilitated, overcoming the installation difficulties that exist in the prior art where pressure is provided by a plunger return spring. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the pressure building unit of this utility model;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a three-dimensional schematic diagram of the pressure building unit (excluding the valve body) of this utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram of the piston body of this utility model;

[0022] Figure 5 This is a cross-sectional schematic diagram of the piston body of this utility model;

[0023] Figure 6 This is a three-dimensional schematic diagram of the ring filter assembly of this utility model;

[0024] Figure 7 This is a three-dimensional schematic diagram of the pressure building unit of this utility model;

[0025] In the diagram, 1 is the valve body, 10 is the drive through hole, 11 is the plunger, 12 is the liquid inlet, 13 is the liquid outlet, and 2 is the mounting cavity.

[0026] 3 is the base, 30 is the cavity, and 31 is the first valve hole.

[0027] 4 is the outlet check valve assembly.

[0028] 5 is the piston body, 50 is the connecting through hole, 51 is the support plate, 52 is the liquid outlet gap, 53 is the support base plate, 54 is the second valve ball, 55 is the support spring, 500 is the piston ring body, 501 is the sealing ring body, 6 is the liquid suction support seat, 60 is the second valve hole, and 61 is the oil inlet channel.

[0029] 7 is the plunger return spring.

[0030] 8 represents the ring filter assembly, 80 represents the ring filter housing, 800 represents the ring filter through-hole, and 801 represents the filter assembly.

[0031] 100 is the slip ring, and 101 is the power assembly.

[0032] 9 is a star-shaped sealing ring.

[0033] 40 is the outlet check valve base, 41 is the cavity, 42 is the first spring, 43 is the first valve ball, and 401 is the liquid outlet. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0035] It should be noted that when a component is referred to as being "set on" or "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "fixed to" another component, or "fixedly connected" to another component, the fixing method can be detachable or non-detachable. When a component is considered to be "connected" or "rotatably connected" to another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] In this invention, terms such as "first," "second," and "third" are used not to represent specific quantities or orders, but merely to distinguish names.

[0038] Figure 1This is a cross-sectional schematic diagram of the pressure building unit of this utility model, which includes a valve body 1, an eccentric power assembly 101 on the valve body, and at least one mounting cavity. The diagram shows two mounting cavities. The power assembly is used to drive the reciprocating motion of the plunger. The valve body 1 also has an inlet 12 and an outlet 13 communicating with the mounting cavities. During operation, the pressure building unit draws in brake fluid from the inlet, pressurizes it, and outputs high-pressure brake fluid from the outlet. Specifically, in this embodiment, it includes a valve body 1, with at least one mounting cavity 2. The mounting cavity 2 is axially divided into a first mounting cavity, a second mounting cavity, and a third mounting cavity. The inlet is connected to the second mounting cavity, and the outlet is connected to the third mounting cavity. The diameters of each mounting cavity increase sequentially, facilitating the sequential insertion of various components from the ends of the mounting cavities. A drive through-hole 10 is connected to the mounting cavity, and a plunger 11 is installed within the drive through-hole. The system also includes a base 3 housed within the mounting cavity, which is installed in the third cavity. The base 3 has a cavity 30 with one open end along its axis, with one open end facing the first mounting cavity. The other end of the base 3 has a first valve hole 31 communicating with the cavity. An outlet check valve assembly 4 is located at the tail of the mounting cavity 30. The outlet check valve assembly is used for… The control base cavity connects to the liquid outlet and includes a piston body 5 fitted within the cavity. The piston body 5 has a connecting through hole 50 along its axis. It also includes a suction support 6, one end of which engages with the connecting through hole, and the other end of which connects to a plunger 11. The plunger 11 is mounted within a drive through hole. The end of the suction support 6 that engages with the piston body has a second valve hole 60. Specifically, the suction support 6 has a boss, and the second valve hole is located on the axis of the boss. The boss is embedded within the connecting through hole, and the end face of the piston body abuts against the surface of the suction support 6. The side wall of the suction support 6 is provided with… The piston body 5 has an oil inlet channel 61 that communicates with the second valve hole. Multiple support plates 51 are provided on the piston body 5 around the connecting through hole. An outlet gap 52 is formed between adjacent support plates. A support base plate 53 is provided at the other end of the support plate 51. The second valve ball 54 is located in the connecting through hole of the piston body and cooperates with the second valve hole 60. The piston body 55 also includes a support spring 55. The two ends of the support spring 55 are respectively connected to the support base plate and the second valve ball. The piston body 50 also includes a plunger return spring 7. The plunger return spring 7 is located in the cavity 30. One end of the plunger return spring 7 is connected to the piston body 5 around the support plate 51, and the other end is connected to the wall of the cavity around the first valve hole 31.

[0039] This invention uses a piston body as the pressure-building component of a pressure-building unit. During the operation of the pressure-building unit, the piston body moves back and forth within the cavity to establish high pressure. During operation, only the piston body rubs against the cavity, making subsequent replacement and maintenance convenient and cost-effective. Furthermore, by placing the support plate and support base plate on the piston body and integrating them with the piston body, the assembly of the support spring and the second valve ball is facilitated, overcoming the installation difficulties that exist in the prior art where pressure is provided by a plunger return spring.

[0040] It also includes a ring filter assembly 8, which includes a ring filter housing 80 disposed in the mounting cavity 2. The ring filter housing is specifically installed in the first cavity of the mounting cavity. One end of the ring filter housing 80 is provided with a ring filter through hole 800 for the plunger to pass through. The other end of the ring filter housing 80 is connected to the base 3. The outer surface of the base is provided with a sleeve part, and the sleeve part is provided with a connecting groove. One end of the ring filter housing is connected to the sleeve part and is provided with a connecting boss that mates with the connecting groove. The two are connected in a snap-fit ​​connection. During disassembly, it is convenient to pull the ring filter housing out along the axis of the mounting cavity through the base, which is convenient for disassembly and assembly. The circumferential surface of the ring filter housing 80 is provided with a filter assembly 801. The ring filter assembly is used to filter foreign objects and prevent foreign objects from entering the cavity of the base and causing damage to the piston body.

[0041] The filter assembly 801 consists of several filter holes on the circumferential surface of the ring filter housing. The ring filter housing is made of plastic injection molding, and the filter holes are integrally processed during the injection molding process. This one-time injection molding process reduces the number of process steps and thus lowers the cost of the ring filter assembly.

[0042] The filter assembly 801 is a metal filter screen plate integrally injection molded with the filter housing. The metal filter screen plate is also integrally injection molded with the filter housing. The metal filter screen plate has better structural strength and durability, which makes the filter assembly have a longer service life and reduces the number of equipment maintenance.

[0043] The piston body 5 includes a piston ring body 500, and a sealing ring body 501 is provided on the outer periphery of the piston ring body 500. One axial end of the sealing ring body 501 is connected to the piston ring body 500, and the other axial end of the sealing ring body is suspended. The outer wall surface of the sealing ring body 501 is tightly fitted with the wall surface of the cavity. The piston body adopts an inner and outer ring structure design, and one end of the sealing ring body is suspended, so that the sealing ring body has an outward tension, thereby ensuring the tight fit between the sealing ring body and the wall surface of the cavity, ensuring the sealing effect between the piston body and the base, and meeting the requirements of high pressure build-up.

[0044] The piston body 5 is made of polyetheretherketone (PEEK), an aromatic crystalline thermoplastic polymer material with high mechanical strength, high temperature resistance, impact resistance, flame retardancy, acid and alkali resistance, hydrolysis resistance, wear resistance, fatigue resistance, radiation resistance, and good electrical properties. In the high temperature and high pressure environment of the pressure building unit, the piston body made of PEEK can meet the requirements of the operating environment. Moreover, PEEK has a small coefficient of thermal expansion, and the size of the piston body changes very little with temperature changes, exhibiting excellent dimensional stability. It also has good wear resistance and fatigue resistance, resulting in a better service life.

[0045] A slip ring 100 is provided inside the drive through hole 10. The plunger reciprocates within the slip ring. The slip ring reduces the wear of the plunger and extends its service life.

[0046] The slip ring 100 is made of polyetheretherketone (PEEK), which has excellent sliding properties. This reduces friction between the plunger and the slip ring, as well as between the piston body and the inner wall of the cavity. It also reduces wear on the injection molding and the base, and lowers the power requirements of the equipment. This facilitates the selection of power components for the pressure building unit, thereby better controlling the cost of the equipment.

[0047] A star-shaped sealing ring 9 is also provided in the mounting cavity 2 at the end of the slip ring 100. The star-shaped sealing ring cooperates with the plunger. Specifically, the star-shaped sealing ring is located between the slip ring and the ring filter housing. It is used to seal the plunger and prevent the brake fluid in the mounting cavity from leaking into the power component of the pressure building unit, thus ensuring the reliability of the equipment.

[0048] The outlet one-way valve assembly 4 includes an outlet one-way valve base 40, which is connected to the end of the mounting cavity 2. The outlet one-way valve base 40 has a recess 41, in which a first spring 42 and a first valve ball 43 are provided. The first valve ball cooperates with a first valve hole. The outlet one-way valve base is used to support the first spring and the first valve ball and to seal the entire mounting cavity. The outlet one-way valve base is connected to the valve body by riveting. The peripheral surface of the outlet one-way valve base has a liquid outlet groove 401 that communicates with the recess. High-pressure brake fluid flows out through the first valve hole and then through the liquid outlet groove, and then flows out from the liquid outlet of the valve body.

[0049] The working process of the pressure building unit of this utility model:

[0050] The power components of the pressure building unit of this utility model are a motor and an eccentric component connected to the motor. The eccentric component is connected to the plunger, thereby driving the plunger to reciprocate.

[0051] When the plunger is driven by the power assembly to move into the mounting cavity of the valve body, the plunger pushes the suction support and piston body to move within the cavity of the base. At the same time, the plunger return spring is compressed, and the brake fluid in the cavity is compressed by the piston body. The high-pressure brake fluid opens the first valve ball, and the high-pressure brake fluid flows out from the first valve hole and is delivered to the working part through the outlet on the valve body. When the high-pressure brake fluid is discharged, the internal and external pressure difference disappears, and the first valve ball returns to its original position under the action of the first spring and engages with the first valve hole.

[0052] When the power assembly loses its force on the plunger, the plunger return spring drives the piston body, the suction support seat, and the plunger to move back. At this time, a vacuum is formed in the cavity near the first valve hole of the piston body. The negative pressure drives the second valve ball to open, and the brake fluid enters the cavity on the other side of the piston body from the inlet on the valve body through the suction support seat and the second valve hole. When the brake fluid is replenished, the process is repeated when the plunger is driven by the power assembly again, forming one working cycle of the pressure building unit.

[0053] In summary, this utility model has the following beneficial effects:

[0054] This invention uses a piston body as the pressure-building component of a pressure-building unit. During the operation of the pressure-building unit, the piston body moves back and forth within the cavity to establish high pressure. During operation, only the piston body rubs against the cavity, making subsequent replacement and maintenance convenient and cost-effective. Furthermore, by placing the support plate and support base plate on the piston body and integrating them with the piston body, the assembly of the support spring and the second valve ball is facilitated, overcoming the installation difficulties that exist in the prior art where pressure is provided by a plunger return spring.

[0055] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A pressure building unit, comprising a valve body, having at least one mounting cavity on the valve body and a drive through hole communicating with the mounting cavity, and a base disposed within the mounting cavity, the base having a cavity open at one end along its axis, and a first valve hole communicating with the cavity at the other end of the base, the rear end of the mounting cavity being provided with an outlet check valve assembly, characterized in that: It also includes a piston body fitted within the cavity, the piston body having a connecting through hole along its axis, a liquid suction support seat, one end of the liquid suction support seat fitting with the connecting through hole, the other end of the liquid suction support seat being connected to a plunger, the plunger being assembled within a drive through hole, the end of the liquid suction support seat fitting with the piston body having a second valve hole, the side wall of the liquid suction support seat having an oil inlet channel communicating with the second valve hole, support plates being provided on the piston body around the connecting through hole, liquid outlet gaps being formed between adjacent support plates, the other end of the support plate having a support base plate, a second valve ball being located within the connecting through hole of the piston body fitting with the second valve hole, a support spring being included, both ends of the support spring being connected to the support base plate and the second valve ball respectively, and a plunger return spring being included, the plunger return spring being located within the cavity, one end of the plunger return spring being connected to the piston body outside the support plate, and the other end being connected to the wall surface of the cavity around the first valve hole.

2. The pressure building unit according to claim 1, characterized in that: It also includes a ring filter assembly, which includes a ring filter housing disposed in the mounting cavity. One end of the ring filter housing is provided with a ring filter through hole for the plunger to pass through, and the other end of the ring filter housing is connected to the base. A filter component is provided on the circumferential surface of the ring filter housing.

3. The pressure building unit according to claim 2, characterized in that: The filter assembly consists of several filter holes arranged on the circumferential surface of the filter housing.

4. The pressure building unit according to claim 2, characterized in that: The filter assembly is a metal filter screen plate integrally injection molded with the ring filter housing.

5. The pressure building unit according to claim 1, characterized in that... The piston body includes a piston ring body, and a sealing ring body is provided on the outer periphery of the piston ring body. One axial end of the sealing ring body is connected to the piston ring body, and the other axial end of the sealing ring body is suspended. The outer wall surface of the sealing ring body is tightly fitted with the wall surface of the cavity.

6. The pressure building unit according to any one of claims 1 or 5, characterized in that: The piston body is made of polyetheretherketone.

7. The pressure building unit according to any one of claims 1 or 2, characterized in that: A slip ring is provided inside the drive through hole, and the plunger reciprocates within the slip ring.

8. The pressure building unit according to claim 7, characterized in that: The slip ring is made of polyetheretherketone.

9. The pressure building unit according to claim 7, characterized in that: A star-shaped sealing ring is also provided in the mounting cavity at the end of the slip ring, and the star-shaped sealing ring cooperates with the plunger.

10. The pressure building unit according to claim 1, characterized in that: The outlet check valve assembly includes an outlet check valve base connected to the end of the mounting cavity. The outlet check valve base has a recess, and a first spring and a first valve ball are provided in the recess. The first valve ball cooperates with a first valve hole.

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