阅读说明：本技术 一种液压管路结构 (Hydraulic pipeline structure ) 是由 郭浩 王德平 罗祖春 徐菲菲 潘孝军 于 2020-11-18 设计创作，主要内容包括：本发明涉及液压控制技术领域,提供一种液压管路结构,包括主管路,主管路上顺次间隔设有第一输出口、进油口、第二输出口、第一输入口、回油口和第二输入口,主管路两端为密封状态,第一输出口和第一输入口用于连通第一执行元件,第二输出口和第二输入口用于连通第二执行元件；主管路内滑动安装有第一活塞和第二活塞；第一活塞位于第一位置时,进油口同时与第一输出口和第二输出口连通,第二活塞位于第二输出口和第一输入口之间；第一活塞位于第二位置时,进油口与第一输出口连通而与第二输出口断开,第二活塞位于第一输入口和回油口之间。本发明提供的液压管路结构可完成两个执行元件液压油路并联和串联的切换,其结构简单,操作方便。(The invention relates to the technical field of hydraulic control, and provides a hydraulic pipeline structure which comprises a main pipeline, wherein a first output port, an oil inlet, a second output port, a first input port, an oil return port and a second input port are sequentially arranged on the main pipeline at intervals; a first piston and a second piston are arranged in the main pipeline in a sliding manner; when the first piston is located at the first position, the oil inlet is simultaneously communicated with the first output port and the second output port, and the second piston is located between the second output port and the first input port; when the first piston is located at the second position, the oil inlet is communicated with the first output port and disconnected with the second output port, and the second piston is located between the first input port and the oil return port. The hydraulic pipeline structure provided by the invention can complete the switching of the parallel connection and the serial connection of the hydraulic oil paths of the two execution elements, and has the advantages of simple structure and convenience in operation.)

1. A hydraulic pipeline structure is characterized by comprising a main pipeline, wherein a first output port, an oil inlet, a second output port, a first input port, an oil return port and a second input port are sequentially arranged on the main pipeline at intervals, two ends of the main pipeline are in a sealed state, the first output port and the first input port are used for being communicated with a first execution element, and the second output port and the second input port are used for being communicated with a second execution element; a first piston and a second piston which are fixedly connected are arranged in the main pipeline in a sliding mode, and the first piston slides between a first position and a second position in the main pipeline to switch the communication state of a first execution element and a second execution element;

when the first piston is located at the first position, the oil inlet is simultaneously communicated with the first output port and the second output port, and the second piston is located between the second output port and the first input port;

when the first piston is located at the second position, the oil inlet is communicated with the first output port and disconnected with the second output port, and the second piston is located between the first input port and the oil return port.

2. The hydraulic circuit arrangement of claim 1, wherein said first position is a side of said first output port remote from said oil inlet.

3. The hydraulic circuit arrangement of claim 1, wherein said first location is directly opposite said oil inlet.

4. The hydraulic pipeline structure according to claim 1, further comprising a first auxiliary pipeline and a third piston, wherein an inlet of the first auxiliary pipeline is connected with one side of the second input port, which is far away from the oil return port, an outlet of the first auxiliary pipeline is connected with one side of the first output port, which is far away from the oil inlet, the third piston is slidably mounted on the main pipeline, and the first piston, the second piston and the third piston are sequentially and fixedly connected; wherein the content of the first and second substances,

when the first piston is located at a first position and a second position, the third piston is located between the second input port and the first auxiliary pipeline inlet;

the first piston can also be located at a third position, when the first piston is located at the third position, the oil inlet is communicated with the second output port and disconnected with the first output port, the second piston is located between the second output port and the first input port, and the third piston is located between the oil return port and the second input port.

5. The hydraulic conduit structure of claim 4, further comprising a fourth piston slidably mounted to the main conduit, the fourth piston being stationary with the first piston and located on a side of the first piston remote from the second piston; wherein the content of the first and second substances,

when the first piston is located at the first position and the second position, the fourth piston is located between the first output port and the first auxiliary pipeline outlet;

when the first piston is located at the third position, the fourth piston is located on one side, away from the first output port, of the first auxiliary pipeline outlet.

6. The hydraulic circuit arrangement of claim 5, further comprising a connecting rod and a drive device, wherein the drive device is fixedly connected to the first, second, third and fourth pistons through the connecting rod.

7. The hydraulic line structure of claim 6, wherein the driving device is installed outside the main line, and a sealing ring is provided between the connecting rod and the main line.

8. The hydraulic line structure according to claim 6, wherein the driving means are a first electromagnetic driving means and a second electromagnetic driving means respectively installed at both ends of the main line; the first electromagnetic driving device and the second electromagnetic driving device are driven in opposite directions.

9. The hydraulic circuit arrangement of claim 8, wherein said first piston is in a first position when the coils of both said first and second electromagnetic drives are not energized; when the coil of the first electromagnetic driving device is electrified, the first piston is positioned at a second position; when the coil of the second electromagnetic driving device is electrified, the first piston is located at a third position.

10. The hydraulic circuit structure of claim 5, further comprising a second auxiliary circuit and a fifth piston slidably mounted on the main circuit, wherein the fifth piston is fixed to the third piston and located on a side of the third piston away from the second piston, and the fifth piston is movable on a side of the first auxiliary circuit inlet away from the second input port; the inlet of the second auxiliary pipeline is opposite to the oil inlet, and the outlet of the second auxiliary pipeline is respectively communicated with two ends of the main pipeline; wherein the content of the first and second substances,

when the first piston is located at a first position, the first piston closes the second auxiliary pipeline inlet;

when the first piston is located at a second position, the second auxiliary pipeline outlet is communicated with one side of the fourth piston, which is far away from the first piston, and is disconnected with one side of the fifth piston, which is far away from the third piston;

when the first piston is located at the third position, the second auxiliary pipeline outlet is communicated with one side of the fifth piston, which is far away from the third piston, and is disconnected with one side of the fourth piston, which is far away from the first piston.

Technical Field

The invention relates to the technical field of hydraulic control, in particular to a hydraulic pipeline structure.

Background

In some current hydraulic systems, there are two actuators that typically need to be switched between various connections, such as a series connection to a parallel connection. However, at present, the switching of the flow paths of the two actuators in parallel and in series is mainly realized by a combination valve, for example, two three-position four-way valves, but this results in a complicated hydraulic pipeline structure and operation thereof, and the switching in place can not be realized by one action.

Disclosure of Invention

The invention provides a hydraulic pipeline structure, which is used for solving the problem that the pipeline structure and the operation thereof are complex when the oil paths of two execution elements need to be switched between parallel connection and series connection in the prior art.

The invention provides a hydraulic pipeline structure which comprises a main pipeline, wherein a first output port, an oil inlet, a second output port, a first input port, an oil return port and a second input port are sequentially arranged on the main pipeline at intervals, two ends of the main pipeline are in a sealed state, the first output port and the first input port are used for communicating a first execution element, and the second output port and the second input port are used for communicating a second execution element; a first piston and a second piston which are fixedly connected are arranged in the main pipeline in a sliding mode, and the first piston slides between a first position and a second position in the main pipeline to switch the communication state of a first execution element and a second execution element;

when the first piston is located at the first position, the oil inlet is simultaneously communicated with the first output port and the second output port, and the second piston is located between the second output port and the first input port;

when the first piston is located at the second position, the oil inlet is communicated with the first output port and disconnected with the second output port, and the second piston is located between the first input port and the oil return port.

According to the hydraulic pipeline structure provided by the invention, the first position is the side of the first output port, which is far away from the oil inlet.

According to the hydraulic pipeline structure provided by the invention, the first position is opposite to the oil inlet.

According to the hydraulic pipeline structure provided by the invention, the hydraulic pipeline structure further comprises a first auxiliary pipeline and a third piston, wherein the inlet of the first auxiliary pipeline is connected with one side, away from the oil return port, of the second input port, the outlet of the first auxiliary pipeline is connected with one side, away from the oil inlet, of the first output port, the third piston is slidably installed on the main pipeline, and the first piston, the second piston and the third piston are sequentially and fixedly connected; wherein the content of the first and second substances,

when the first piston is located at a first position and a second position, the third piston is located between the second input port and the first auxiliary pipeline inlet;

the first piston can also be located at a third position, when the first piston is located at the third position, the oil inlet is communicated with the second output port and disconnected with the first output port, the second piston is located between the second output port and the first input port, and the third piston is located between the oil return port and the second input port.

According to the hydraulic pipeline structure provided by the invention, the hydraulic pipeline structure further comprises a fourth piston which is slidably mounted on the main pipeline, wherein the fourth piston is fixedly connected with the first piston and is positioned on one side of the first piston, which is far away from the second piston; wherein the content of the first and second substances,

when the first piston is located at the first position and the second position, the fourth piston is located between the first output port and the first auxiliary pipeline outlet;

when the first piston is located at the third position, the fourth piston is located on one side, away from the first output port, of the first auxiliary pipeline outlet.

According to the hydraulic pipeline structure provided by the invention, the hydraulic pipeline structure further comprises a connecting rod and a driving device, wherein the driving device is fixedly connected with the first piston, the second piston, the third piston and the fourth piston through the connecting rod.

According to the hydraulic pipeline structure provided by the invention, the driving device is arranged on the outer side of the main pipeline, and a sealing ring is arranged between the connecting rod and the main pipeline.

According to the hydraulic pipeline structure provided by the invention, the driving devices are a first electromagnetic driving device and a second electromagnetic driving device which are respectively arranged at two ends of the main pipeline; the first electromagnetic driving device and the second electromagnetic driving device are driven in opposite directions.

According to the hydraulic pipeline structure provided by the invention, when the coils of the first electromagnetic driving device and the second electromagnetic driving device are not electrified, the first piston is positioned at a first position; when the coil of the first electromagnetic driving device is electrified, the first piston is positioned at a second position; when the coil of the second electromagnetic driving device is electrified, the first piston is located at a third position.

According to the hydraulic pipeline structure provided by the invention, the hydraulic pipeline structure further comprises a second auxiliary pipeline and a fifth piston which is slidably installed on the main pipeline, the fifth piston is fixedly connected with the third piston and is positioned on one side of the third piston, which is far away from the second piston, and the fifth piston moves on one side of the inlet of the first auxiliary pipeline, which is far away from the second input port; the inlet of the second auxiliary pipeline is opposite to the oil inlet, and the outlet of the second auxiliary pipeline is respectively communicated with two ends of the main pipeline; wherein the content of the first and second substances,

when the first piston is located at a first position, the first piston closes the second auxiliary pipeline inlet;

when the first piston is located at a second position, the second auxiliary pipeline outlet is communicated with one side of the fourth piston, which is far away from the first piston, and is disconnected with one side of the fifth piston, which is far away from the third piston;

when the first piston is located at the third position, the second auxiliary pipeline outlet is communicated with one side of the fifth piston, which is far away from the third piston, and is disconnected with one side of the fourth piston, which is far away from the first piston.

According to the hydraulic pipeline structure provided by the invention, the oil inlet and the oil outlet of the oil tank, the output port and the input port which are communicated with the first execution element and the output port and the input port which are communicated with the second execution element are arranged on the main pipeline, the piston assembly is arranged in the pipeline in a sliding manner, the switching between the parallel connection and the serial connection of the hydraulic oil circuits of the two execution elements can be completed through one-time action, the pipeline structure is simple, and the operation is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a hydraulic circuit configuration according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a hydraulic circuit configuration according to an embodiment of the present invention with the first piston in a second position;

fig. 3 is a schematic view of a hydraulic circuit configuration according to an embodiment of the present invention in a state where the first piston is in the third position.

Reference numerals:

11. a main pipeline; 12. a first auxiliary pipeline; 121. a first auxiliary line inlet; 122. a first auxiliary line outlet; 13. a second auxiliary pipeline; 21. an oil inlet; 22. an oil return port; 30. a first actuator; 31. a first output port; 32. a first input port; 40. a second actuator; 41. a second output port; 42. a second input port; 51. a first piston; 52. a second piston; 53. a third piston; 54. a fourth piston; 55. a fifth piston; 6. a connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The hydraulic circuit configuration of the embodiment of the present invention is described below with reference to fig. 1 to 3.

Fig. 1 is a schematic diagram of a hydraulic circuit structure according to an embodiment of the present invention. The hydraulic pipeline structure comprises a main pipeline 11, wherein a first output port 31, an oil inlet 21, a second output port 41, a first input port 32, an oil return port 22 and a second input port 42 are sequentially arranged on the main pipeline 11 at intervals. Both ends of the main pipe 11 are in a sealed state. The first output port 31 and the first input port 32 are used to communicate with the first actuator 30, and the second output port 41 and the second input port 42 are used to communicate with the second actuator 40. A first piston 51 and a second piston 52 which are fixedly connected are slidably mounted in the main pipeline 11, and the first piston 51 slides between a first position and a second position in the main pipeline 11 to switch the communication state of the first actuator 30 and the second actuator 40.

When the first piston 51 is located at the first position, the oil inlet 21 is simultaneously communicated with the first output port 31 and the second output port 41, and the second piston 52 is located between the second output port 41 and the first input port 32.

When the first piston 51 is located at the second position, the oil inlet 21 is communicated with the first output port 31 and disconnected from the second output port 41, and the second piston 52 is located between the first input port 32 and the oil return port 22.

When in use, two ends of the hydraulic oil tank are respectively communicated with the oil inlet 21 and the oil return port 22; two hydraulic oil ports of the first actuator 30 are respectively communicated with the first output port 31 and the first input port 32; the two hydraulic ports of the second actuator 40 are respectively communicated with the second output port 41 and the second input port 42.

Fig. 1 shows a state of the hydraulic line structure when the first piston is located at the first position, in which the hydraulic oil paths of the first actuator 30 and the second actuator 40 are in a parallel state. Fig. 2 is a schematic diagram of a state of the hydraulic pipeline structure according to the embodiment of the present invention when the first piston is located at the second position, at this time, the hydraulic oil paths of the first actuator 30 and the second actuator 40 are in a series state, and hydraulic oil flows through the first actuator 30 and the second actuator 40 in sequence. By driving the first piston 51 to slide in the main conduit 11, the second piston 52 is coupled to the first piston 51 to switch the first piston 51 between the first position and the second position, thus enabling switching between parallel and serial connection of the two actuators. The hydraulic pipeline provided by the embodiment of the invention has a simple structure, can complete the parallel-serial switching of the hydraulic oil paths of the two execution elements through one action, and is very convenient to operate.

Wherein, the first position is the side of the first output port 31 far away from the oil inlet 21; alternatively, the first position is a position facing the oil inlet 21, and the opening size of the oil inlet 21 is larger than the length of the first piston 51, so that when the first piston 51 is located in the oil inlet 21, the oil inlet 21 can be in a communication state with the first output port 31 and the second output port 41.

When the first position is a side of the first output port 31 away from the oil inlet 21, the first output port 31, the oil inlet 21, the second output port 41, the first input port 32, the interval between the oil return port 22 and the second input port 42, and the interval between the first piston 51 and the second piston 52 are set according to the state switching target, the principle of which is the same as that when the first position is a position facing the oil inlet 21 in the following embodiment. The following embodiments are all described by taking the first position as the position facing the oil inlet 21.

Further, the hydraulic circuit structure of the embodiment of the present invention further includes the first auxiliary circuit 12 and the third piston 53. The first auxiliary line inlet 121 is connected to the second input port 42 on the side away from the oil return port 22, and the first auxiliary line outlet 122 is connected to the first output port 31 on the side away from the oil inlet 21. The third piston 53 is slidably mounted in the main conduit 11, and the first piston 51, the second piston 52 and the third piston 53 are fixedly connected in sequence.

As shown in fig. 1 and 2, when the first piston 51 is located at the first position and the second position, the third piston 53 is located between the second input port 42 and the first auxiliary line inlet 121. When the first piston 51 is in the first position, the hydraulic lines of the first and second actuators 30, 40 are still in parallel; when the first piston 51 is in the second position, the hydraulic lines of the first actuator 30 and the second actuator 40 are still in series, and hydraulic oil flows through the first actuator 30 and the second actuator 40 in sequence.

The first piston 51 can also be located at a third position, as shown in fig. 3, which is a schematic diagram of a state of the hydraulic circuit structure according to the embodiment of the present invention when the first piston is located at the third position, when the first piston 51 is located at the third position, the oil inlet 21 is communicated with the second output port 41 and is disconnected from the first output port 31, the second piston 52 is located between the second output port 41 and the first input port 32, and the third piston 53 is located between the oil return port 22 and the second input port 42. At this time, the hydraulic oil paths of the first actuator 30 and the second actuator 40 are in a serial state, and the hydraulic oil flows through the second actuator 40 and the first actuator 30 in sequence. Switching of the direction of the series connection of the first actuator 30 and the second actuator 40 can be achieved when the first piston 51 is switched between the second position and the third position.

In the above embodiment, as shown in fig. 2, since the hydraulic oil entering from the oil inlet 21 needs to fill the first auxiliary line 12 each time the hydraulic oil is switched between the first position and the second position, there is a problem that the response speed of the first actuator 30 is slow, therefore, the hydraulic line structure provided in the embodiment of the present invention further includes the fourth piston 54 slidably mounted on the main line 11, and the fourth piston 54 is fixed to the first piston 51 and is located on a side of the first piston 51 away from the second piston 52. Wherein the fourth piston 54 is located between the first output port 31 and the first auxiliary line outlet 122 when the first piston 51 is located at the first position and the second position. Thereby disconnecting the oil inlet 21 from the first auxiliary line outlet 122 so that when the first piston 51 is in the first and second positions, hydraulic oil can quickly reach the first actuator 30 through the first output port 31, increasing its respective speed.

When the first piston 51 is located at the third position, the fourth piston 54 is located at a side of the first auxiliary line outlet 122 away from the first output port 31, so that the first auxiliary line outlet 122 is in communication with the first output port 31, forming a series circuit from the second actuator 40 to the first actuator 30.

The first piston, the second piston, the third piston and the fourth piston can be driven manually or by an automated driving device. For example, the hydraulic pipeline structure provided by the present embodiment further includes a connecting rod 6 and a driving device, and the driving device is fixedly connected with the first piston, the second piston, the third piston and the fourth piston through the connecting rod 6.

In one embodiment, the driving device is installed outside the main pipeline 11, the driving device is in driving connection with the connecting rod 6 penetrating out of the main pipeline 11, and a sealing ring is arranged between the connecting rod 6 and the main pipeline 11. For example, the driving device is a stepping motor, which is installed outside one end of the main pipe 11 and drives the first piston 51 to switch between the first position, the second position, and the third position, thereby switching the oil path. For another example, the driving devices are linear cylinders, first and second cylinders, respectively, which are respectively installed at both ends of the main pipe 11. Setting the extension length of the driving end of the first cylinder according to the distance of the second position of the first piston 51 relative to the first position; the extension of the driving end of the second cylinder is set according to the distance of the third position of the first piston 51 from the first position. When the first piston 51 needs to be switched from the first position to the second position, the driving end of the first cylinder extends out, and the driving end of the second cylinder retracts; when it is desired to switch the first piston 51 from the first position to the third position, the second cylinder actuation end is extended and the first cylinder actuation end is retracted.

In one embodiment, the driving devices are a first electromagnetic driving device and a second electromagnetic driving device respectively installed at two ends of the main pipeline 11. The driving directions of the first electromagnetic driving device and the second electromagnetic driving device are opposite. Specifically, the first electromagnetic driving device is fixedly connected with a connecting rod on one side of the fourth piston 54 away from the first piston 51, and is used for driving the first piston 51 to switch to the second position; the second electromagnetic driving device is fixedly connected with a connecting rod on one side of the fifth piston 55 far away from the third piston 53; for driving the first piston 51 to switch to the third position.

When the coils of the first electromagnetic driving device and the second electromagnetic driving device are not energized, the first piston 51 is located at the first position. When the coil of the first electromagnetic drive is energized, the first piston 51 is in the second position. When the coil of the second electromagnetic drive is energized, the first piston 51 is in the third position. Specifically, first electromagnetic drive device and second electromagnetic drive device all include the magnetic conductor and encircle in the coil of magnetic conductor, and the magnetic conductor and coil are installed inside main line 11, and the magnetic conductor is provided with the permanent magnet with connecting rod 6 fixed connection, the position that the outside of main line 11 corresponds the coil.

Further, the hydraulic circuit structure provided by this embodiment further includes a second auxiliary circuit 13 and a fifth piston 55 slidably mounted on the main circuit 11, and the fifth piston 55 is fixed to the third piston 53 and is located on a side of the third piston 53 away from the second piston 52. The fifth piston 55 is movable on the side of the first auxiliary line inlet 121 remote from the second inlet port 42. The inlet of the second auxiliary pipeline is opposite to the oil inlet 21, and the outlet of the second auxiliary pipeline is respectively communicated with two ends of the main pipeline 11.

Wherein, when the first piston 51 is located at the first position, the first piston 51 closes the inlet of the second auxiliary pipeline 13; when the first piston 51 is located at the second position, the outlet of the second auxiliary line 13 is communicated with the side of the fourth piston 54 far away from the first piston 51 and is disconnected with the side of the fifth piston 55 far away from the third piston 53; when the first piston 51 is in the third position, the outlet of the second sub-line 13 communicates with the side of the fifth piston 55 remote from the third piston 53 and is disconnected from the side of the fourth piston 54 remote from the first piston 51.

By arranging the second auxiliary pipeline 13, when the first piston 51 is located at the second position, hydraulic oil can enter a chamber where a magnetic conductor of the first electromagnetic driving device is located, so as to assist in keeping the position of the first piston 51 stable at the second position; it is also possible to have hydraulic oil enter the chamber in which the magnetic conductors of the second electromagnetic drive are located when the first piston 51 is in the third position, to assist in keeping the position of the first piston 51 stable in the third position.

The hydraulic pipeline structure provided by the embodiment of the invention can be used as an independent hydraulic pipeline switching assembly to be installed in a hydraulic system with two execution elements, and the oil inlet and the oil return port of the oil tank, the two hydraulic oil ports of the first execution element and the two hydraulic oil ports of the second execution element are respectively and correspondingly connected with the oil ports on the hydraulic pipeline switching assembly, so that the switching between the parallel connection and the serial connection of the two execution element hydraulic oil paths can be realized.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.