Compact radial plunger pair unit of integrated one-way valve

Abstract

The utility model discloses a compact type radial plunger pair unit of an integrated one-way valve. The compact type radial plunger pair unit comprises a cylinder body, a plunger, a first one-way valve and a second one-way valve. A plunger cavity is formed in the cylinder body, and the plunger is connected into the plunger cavity in a sliding mode and reciprocates in the length direction of the plunger cavity. The cylinder body is further provided with a first through hole and a second through hole which penetrate from the outside of the cylinder body to the plunger cavity, the first one-way valve is arranged in the first through hole, and the second one-way valve is arranged in the second through hole. When the plunger slides towards the outer side of the plunger cavity, the first one-way valve is driven to be opened, and the second one-way valve is driven to be closed. The compact type radial plunger pair unit of the integrated one-way valve has the advantages of being compact in structure, accurate in one-way flow control, easy to install and maintain and the like, and is suitable for various hydraulic transmission systems.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic transmission technology, and in particular to a compact radial piston unit with an integrated check valve. Background Technology

[0002] Radial piston units are key components in hydraulic transmission systems, used to pressurize, transmit, and control the flow of media. Traditional radial piston units often suffer from problems such as complex structure, inconvenient installation of check valves, high manufacturing and assembly difficulties, large overall size, and significant space requirements. Therefore, developing a radial piston unit with a compact structure, high check valve integration, and reliable sealing performance is of great significance. Utility Model Content

[0003] The purpose of this invention is to provide a compact radial plunger unit with an integrated one-way valve to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution:

[0004] A compact radial plunger subunit with integrated one-way valves includes a cylinder, a plunger, a first one-way valve, and a second one-way valve. The cylinder has a plunger cavity inside, and the plunger is slidably connected to the plunger cavity and reciprocates along the length of the plunger cavity. The cylinder also has a first through hole and a second through hole extending from the outside of the cylinder to the plunger cavity, respectively. The first one-way valve is disposed in the first through hole, and the second one-way valve is disposed in the second through hole. When the plunger slides outward from the plunger cavity, it drives the first one-way valve to open and the second one-way valve to close.

[0005] Further, the first one-way valve includes a first valve seat, a first sealing plate, a first spring, and a first spring seat; the first valve seat is fixedly installed in the first through hole, and the first spring seat is fixedly connected to the first valve seat; the first spring seat has a first hollow portion, and the first valve seat has a first valve hole, the first end of the first valve hole is connected to the outside of the cylinder body, and the second end is connected to the plunger cavity through the first hollow portion; the first sealing plate and the first spring are disposed between the first spring seat and the first valve seat, and the preload of the first spring drives the first sealing plate to seal the second end of the first valve hole.

[0006] Furthermore, the first spring seat includes a first base and a plurality of first legs connected to the first base, with gaps between the plurality of first legs. The first base is provided with a first through hole, and the second end of the first valve hole communicates with the plunger cavity through the gaps between the plurality of first legs and the first through hole.

[0007] Furthermore, the inner sides of the plurality of first legs are slidably engaged with the outer side of the first sealing plate.

[0008] Furthermore, a plurality of first limiting grooves are provided on the side wall of the first through hole, and the plurality of first legs are connected and engaged with the plurality of first limiting grooves one by one.

[0009] Furthermore, the second one-way valve includes a second valve seat, a second sealing plate, a second spring, and a second spring seat; the second valve seat is fixedly installed in the second through hole, the second spring seat is fixedly connected to the second valve seat, the second spring seat has a second hollow portion, the second valve seat has a second valve hole, the first end of the second valve hole communicates with the outside of the cylinder body through the second hollow portion, and the second end communicates with the plunger cavity; the second sealing plate and the second spring are disposed between the second spring seat and the second valve seat, and the preload force of the second spring drives the second sealing plate to seal the first end of the second valve hole.

[0010] Furthermore, the second spring seat includes a second base and a plurality of second legs connected to the second base, with gaps between the plurality of second legs. The second base is provided with a second through hole, and the first end of the second valve hole communicates with the outside of the cylinder body through the gaps between the plurality of second legs and the second through hole.

[0011] Furthermore, a plurality of second limiting grooves are provided on the side wall of the second through hole, and the plurality of second legs are connected and engaged with the plurality of second limiting grooves one by one.

[0012] Furthermore, a return spring is provided between the cylinder and the plunger, and the preload of the return spring drives the plunger to slide out of the plunger cavity.

[0013] Furthermore, the compact radial plunger subunit with integrated one-way valve also includes an oil inlet module and an oil outlet module, wherein the oil inlet module is connected to the first through hole and the oil outlet module is connected to the second through hole.

[0014] The beneficial effects of this utility model are as follows: The compact radial plunger subunit of the integrated one-way valve of this utility model has the advantages of compact structure, precise one-way flow control, and easy installation and maintenance, and is suitable for various hydraulic transmission systems. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a cross-sectional view of the cylinder body of this utility model.

[0019] Figure 4 This is a cross-sectional view of the first check valve of this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the first spring seat of this utility model.

[0021] Figure 6 This is a cross-sectional view of the second check valve of this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of the second spring seat of this utility model.

[0023] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0028] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] like Figures 1 to 3 As shown, a compact radial plunger subunit 200 with integrated one-way valve includes a cylinder body 100, a plunger 200, a first one-way valve 300, and a second one-way valve 400. A plunger cavity 101 is provided inside the cylinder body 100, and the plunger 200 is slidably connected to the plunger cavity 101 and reciprocates along the length of the plunger cavity 101. The cylinder body 100 is also provided with a first through hole 102 and a second through hole 103, respectively penetrating from the outside of the cylinder body 100 to the plunger cavity 101. The first one-way valve 300 is disposed in the first through hole 102, and the second one-way valve 400 is disposed in the second through hole 103. When the plunger 200 slides outward from the plunger cavity 101, it drives the first one-way valve 300 to open and the second one-way valve 400 to close.

[0032] As an example, the compact radial plunger 200 sub-unit with integrated one-way valve of this application embodiment includes a cylinder body 100, a plunger 200, a first one-way valve 300, and a second one-way valve 400. A plunger cavity 101 is provided inside the cylinder body 100. The plunger 200 is slidably connected to the plunger cavity 101 and reciprocates along the length of the plunger cavity 101 to change the volume and pressure within the plunger cavity 101. A first through hole 102 and a second through hole 103 are also provided on the cylinder body 100, respectively penetrating from the outside of the cylinder body 100 to the plunger cavity 101. The first check valve 300 is disposed in the first through hole 102. The opening direction of the first check valve 300 is from the outside of the cylinder body 100 to the inside of the plunger cavity 101. The first check valve 300 is connected to the oil supply device. When the first check valve 300 is open, oil can flow into the plunger cavity 101 through the first check valve 300. The second check valve 400 is disposed in the second through hole 103. The opening direction of the second check valve 400 is from the inside of the plunger cavity 101 to the outside of the cylinder body 100. Limiting parts are provided on the upper and lower sides of the through hole to lock the check valves therein. The limiting parts are integrally formed by the cylinder body 100 under pressure deformation to improve the pressure resistance and high-pressure sealing performance of the check valves. The working principle of this radial plunger 200 sub-unit is as follows:

[0033] (i) During the oil suction process, the plunger 200 slides to the outside of the plunger cavity 101, increasing the volume of the plunger cavity 101 and causing the air pressure in the plunger cavity 101 to decrease, forming a negative pressure. The first one-way valve 300 opens inward to the plunger cavity 101 under the driving action of the external air pressure of the cylinder 100. At the same time, the second one-way valve 400 closes inward to the plunger cavity 101 under the driving action of the external air pressure of the cylinder 100, thereby realizing the one-way flow control of the medium. The oil medium flows into the plunger cavity 101 through the first one-way valve 300 under the action of vacuum suction and atmospheric pressure.

[0034] (ii) During the oil discharge process, the piston 200 slides into the piston cavity 101, reducing the volume of the piston cavity 101 and compressing the oil in the piston cavity 101 to generate a certain load pressure. Under the driving action of the load pressure, the first check valve 300 closes to the outside of the cylinder 100. At the same time, the second check valve 400 opens to the outside of the cylinder 100 under the driving action of the load pressure, thereby realizing the one-way flow control of the medium. The oil medium is discharged from the cylinder 100 through the second check valve 400 under the action of the load pressure.

[0035] The technical advantages of the compact radial plunger unit with integrated check valve in this application are as follows:

[0036] (1) Compact structure: By integrating the first one-way valve and the second one-way valve onto the cylinder block, the structure of the entire radial plunger sub-unit is more compact, reducing the installation space.

[0037] (2) Precise one-way flow control: The precise cooperation between the first one-way valve and the second one-way valve realizes the one-way flow control of the medium and improves the stability of the hydraulic transmission system.

[0038] (3) Easy to install and maintain: The radial plunger sub-unit of this application adopts a modular design, and the connection between the various components is simple and reliable, making it easy to install and maintain.

[0039] In one embodiment, see Figure 4 The first one-way valve 300 includes a first valve seat 310, a first sealing plate 320, a first spring 330, and a first spring seat 340. The first valve seat 310 is fixedly installed in the first through hole 102, and the first spring seat 340 is fixedly connected to the first valve seat 310. The first spring seat 340 has a first hollow portion 341, and the first valve seat 310 has a first valve hole 311. The first end of the first valve hole 311 communicates with the outside of the cylinder body 100, and the second end communicates with the plunger cavity 101 through the first hollow portion 341. The first sealing plate 320 and the first spring 330 are disposed between the first spring seat 340 and the first valve seat 310. The preload of the first spring 330 drives the first sealing plate 320 to seal the second end of the first valve hole 311. The contact surface between the first sealing plate 320 and the first valve seat 310 is a planar seal. Its working principle is as follows: During the oil suction process, the driven plunger 200 slides to the outside of the plunger cavity 101, the pressure inside the plunger cavity 101 decreases, and the external air pressure of the cylinder 100 provides the first sealing plate 320 with a thrust in the direction of the plunger cavity 101. When the thrust is greater than the preload of the first spring 330, the first spring 330 contracts, and the first sealing plate 320 moves into the plunger cavity 101 under the action of the thrust, thereby opening the first one-way valve 300, so that the outside of the cylinder 100 is connected to the plunger cavity 101, allowing the medium to flow from the outside of the cylinder 100 into the plunger cavity 101. Conversely, during the oil discharge process, the driving plunger 200 slides towards the inside of the plunger cavity 101. When the sum of the preload force of the first spring 330 and the load pressure generated by the compression of the oil in the plunger cavity 101 is greater than the thrust of the external air pressure of the cylinder 100, the first sealing plate 320 is driven to seal the second end of the first valve hole 311, thereby closing the first check valve 300 and blocking the communication between the outside of the cylinder 100 and the plunger cavity 101.

[0040] In one embodiment, see Figure 5The first spring seat 340 includes a first base 342 and a plurality of first legs 343 connected to the first base 342. A gap is provided between the plurality of first legs 343. A first through hole is provided on the first base 342. The gap and the first through hole are connected, forming a hollow portion on the first spring seat 340. The second end of the first valve hole 311 communicates with the plunger cavity 101 through the gap between the plurality of first legs 343 and the first through hole, forming an oil suction channel. This design makes the structure of the first one-way valve 300 more compact while increasing the flow area of ​​the medium and improving the oil suction speed.

[0041] In one embodiment, see Figure 4 and Figure 5 The inner sides of multiple first support feet 343 slide against the outer sides of the first sealing plate 320. The multiple first support feet 343 provide a guiding function for the first sealing plate 320, effectively fixing it in place so that it reciprocates along the axis of the first spring 330, preventing lateral deflection, and avoiding problems such as failure to seal or poor sealing effect due to sealing plate misalignment, thereby effectively reducing oil loss.

[0042] In one embodiment, see Figure 3 Multiple first limiting grooves 104 are provided on the side wall of the first through hole 102. Multiple first legs 343 are connected and engaged with the multiple first limiting grooves 104 one by one to achieve relative fixation between the first spring seat 340 and the cylinder body 100, and to prevent the first spring seat 340 and the first one-way valve 300 from rotating.

[0043] In one embodiment, see Figure 6The second one-way valve 400 includes a second valve seat 410, a second sealing plate 420, a second spring 430, and a second spring seat 440. The second valve seat 410 is fixedly installed in the second through hole 103, and the second spring seat 440 is fixedly connected to the second valve seat 410. The second spring seat 440 has a second hollow portion 441, and the second valve seat 410 has a second valve hole 411. The first end of the second valve hole 411 communicates with the outside of the cylinder body 100 through the second hollow portion 441, and the second end communicates with the plunger cavity 101. The second sealing plate 420 and the second spring 430 are disposed between the second spring seat 440 and the second valve seat 410. The preload of the second spring 430 drives the second sealing plate 420 to seal the first end of the second valve hole 411. The contact surface between the second sealing plate 420 and the second valve seat 410 is a planar seal. Its working principle is the same as that of the first one-way valve 300, but the direction of action is opposite, as follows: During the oil suction process, the driven plunger 200 slides to the outside of the plunger cavity 101, the pressure inside the plunger cavity 101 decreases, and the external air pressure of the cylinder 100 provides the second sealing plate 420 with a thrust in the direction of the plunger cavity 101, so that the sum of the preload of the second spring 430 and the thrust of the external air pressure is greater than the air pressure inside the plunger cavity 101, thereby driving the second sealing plate 420 to seal the first end of the second valve hole 411, realizing the closure of the second one-way valve 400, and blocking the connection between the plunger cavity 101 and the outside of the cylinder 100. Conversely, during the oil discharge process, the driving plunger 200 slides towards the inside of the plunger cavity 101. When the load pressure generated by the compression of the oil in the plunger cavity 101 is greater than the sum of the preload of the second spring 430 and the thrust of the external air pressure, the second spring 430 is driven to compress, and the second sealing plate 420 moves towards the outside of the cylinder 100, thereby opening the second one-way valve 400, connecting the plunger cavity 101 with the outside of the cylinder 100, and allowing the medium to be discharged outside the cylinder 100.

[0044] In one embodiment, see Figure 7 The second spring seat 440 includes a second base 442 and a plurality of second legs 443 connected to the second base 442. A gap is provided between the plurality of second legs 443. A second through hole is provided on the second base 442. The first end of the second valve hole 411 communicates with the outside of the cylinder body 100 through the gap between the plurality of second legs 443 and the second through hole. The design principle and function of the second spring seat 440 are the same as those of the first spring seat 340, and will not be described again here.

[0045] In one embodiment, see Figure 3 Multiple second limiting grooves 105 are provided on the side wall of the second through hole 103, and multiple second supports 443 are connected and engaged with the multiple second limiting grooves 105 one by one. The design principle and function of the second limiting grooves 105 are the same as those of the first limiting grooves 104, and will not be described again here.

[0046] In one embodiment, see Figure 1 and Figure 2 A return spring 500 is provided between the cylinder body 100 and the plunger 200. The preload of the return spring 500 drives the plunger 200 to slide out of the plunger cavity 101, thereby realizing the automatic return and automatic oil suction process of the plunger 200. Only an external force needs to be applied during the oil discharge process to drive the plunger 200 to slide into the plunger cavity 101. A spring seat is also provided between the cylinder body 100 and the return spring 500 to reduce friction and wear between the return spring 500 and the cylinder body 100, while also achieving precise installation and positioning of the return spring 500.

[0047] In one embodiment, see Figure 1 and Figure 2 The compact radial plunger 200 subunit with integrated one-way valve also includes an inlet module 600 and an outlet module 700. One end of the inlet module 600 is connected to the first through hole 102, and the other end is connected to an external oil supply device, for supplying media to the plunger cavity 101. The outlet module 700 is connected to the second through hole 103, for discharging the media from the plunger cavity 101.

[0048] It should also be noted that, without conflict, the embodiments of this utility model and the features therein can be combined with each other to obtain new embodiments.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. The scope of protection of the present utility model should be determined by the scope of the claims. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A compact radial plunger assembly with an integrated one-way valve, characterized in that, The system includes a cylinder body (100), a plunger (200), a first check valve (300), and a second check valve (400). The cylinder body (100) has a plunger cavity (101) inside, and the plunger (200) is slidably connected to the plunger cavity (101) and reciprocates along the length of the plunger cavity (101). The cylinder body (100) also has a first through hole (102) and a second through hole (103) extending from the outside of the cylinder body (100) to the plunger cavity (101). The first check valve (300) is located in the first through hole (102), and the second check valve (400) is located in the second through hole (103). When the plunger (200) slides outward from the plunger cavity (101), it drives the first check valve (300) to open and the second check valve (400) to close.

2. The compact radial plunger unit with integrated one-way valve according to claim 1, characterized in that, The first one-way valve (300) includes a first valve seat (310), a first sealing plate (320), a first spring (330), and a first spring seat (340); the first valve seat (310) is fixedly installed in the first through hole (102), and the first spring seat (340) is fixedly connected to the first valve seat (310); the first spring seat (340) has a first hollow portion (341), and the first valve seat (310) has a first valve hole (311); the first end of the first valve hole (311) communicates with the outside of the cylinder body (100), and the second end communicates with the plunger cavity (101) through the first hollow portion (341); the first sealing plate (320) and the first spring (330) are disposed between the first spring seat (340) and the first valve seat (310), and the preload of the first spring (330) drives the first sealing plate (320) to seal the second end of the first valve hole (311).

3. The compact radial plunger unit with integrated one-way valve according to claim 2, characterized in that, The first spring seat (340) includes a first base (342) and a plurality of first legs (343) connected to the first base (342). A gap is provided between the plurality of first legs (343). A first through hole is provided on the first base (342). The second end of the first valve hole (311) communicates with the plunger cavity (101) through the gap between the plurality of first legs (343) and the first through hole.

4. The compact radial plunger unit with integrated one-way valve according to claim 3, characterized in that, The inner sides of the plurality of first legs (343) slide against the outer side of the first sealing plate (320).

5. The compact radial plunger unit with integrated one-way valve according to claim 3, characterized in that, The first through hole (102) has a plurality of first limiting grooves (104) on its side wall, and the plurality of first legs (343) are connected and engaged with the plurality of first limiting grooves (104) one by one.

6. The compact radial plunger subunit of the integrated one-way valve according to claim 1, wherein the second one-way valve (400) includes a second valve seat (410), a second sealing plate (420), a second spring (430), and a second spring seat (440); the second valve seat (410) is fixedly installed in the second through hole (103), the second spring seat (440) is fixedly connected to the second valve seat (410), the second spring seat (440) has a second hollow portion (441), and the second valve seat (410) has a second hollow portion (441). 0) A second valve hole (411) is provided. The first end of the second valve hole (411) is connected to the outside of the cylinder body (100) through the second hollow part (441), and the second end is connected to the plunger cavity (101). The second sealing plate (420) and the second spring (430) are disposed between the second spring seat (440) and the second valve seat (410). The preload of the second spring (430) drives the second sealing plate (420) to seal the first end of the second valve hole (411).

7. The compact radial plunger unit with integrated one-way valve according to claim 6, characterized in that, The second spring seat (440) includes a second base (442) and a plurality of second legs (443) connected to the second base (442). A gap is provided between the plurality of second legs (443). A second through hole is provided on the second base (442). The first end of the second valve hole (411) communicates with the outside of the cylinder (100) through the gap between the plurality of second legs (443) and the second through hole.

8. The compact radial plunger unit with integrated one-way valve according to claim 7, characterized in that, The second through hole (103) has a plurality of second limiting grooves (105) on its side wall, and the plurality of second legs (443) are connected and engaged with the plurality of second limiting grooves (105) one by one.

9. The compact radial plunger unit with integrated one-way valve according to claim 1, characterized in that, A return spring (500) is provided between the cylinder (100) and the plunger (200), and the preload of the return spring (500) drives the plunger (200) to slide out of the plunger cavity (101).

10. The compact radial plunger unit with integrated one-way valve according to claim 1, characterized in that, The compact radial plunger sub-unit with integrated one-way valve also includes an oil inlet module (600) and an oil outlet module (700). The oil inlet module (600) is connected to the first through hole (102), and the oil outlet module (700) is connected to the second through hole (103).

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