A force increasing device based on hydraulic logic automatic commutation

Abstract

The application discloses a force increasing device based on hydraulic logic automatic reversing and belongs to the technical field of hydraulic elements. The force increasing device comprises a cylinder body, an oil cavity of the cylinder body is provided with a first signaling hole, a second signaling hole, a third signaling hole and a fourth signaling hole, a piston is arranged in the oil cavity and is provided with a first annular groove and a second annular groove, when the piston is located at both ends of the oil cavity, the first annular groove is communicated with the second signaling hole or the second annular groove is communicated with the third signaling hole, a logic valve group, a P port and a T port are respectively communicated with the logic valve group, each signaling hole is respectively communicated with the logic valve group, a main hydraulic reversing valve, the P port and the T port are communicated with the oil cavity through the main hydraulic reversing valve, and the logic valve group is communicated with the main hydraulic reversing valve. Through the position cooperation of the second signaling hole, the third signaling hole and the first annular groove and the second annular groove, the moving stroke of the piston is increased and the volume of the oil cavity is increased, the piston stroke can be increased by 120% under the condition that the size of the cylinder body is unchanged, the reversing frequency is reduced and the service life of the supercharger is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydraulic elements, and particularly relates to a force increasing device based on hydraulic logic automatic reversing. BACKGROUND

[0002] At present, the highest pressure grade of a conventional hydraulic system at home and abroad is generally 32-40Mpa. When the hydraulic system needs high pressure grade oil, a reciprocating pressure booster is generally used to realize the pressure increasing purpose. The pressure booster is used in a pressure increasing circuit to realize oil pressure amplification, so that higher pressure oil than the system pressure can be realized on a branch.

[0003] However, the current pressure booster has certain defects in the matching structure of the piston and the cylinder body, and the high pressure oil flow pushed out in a single working stroke is less, which leads to high reversing frequency of the entire pressure booster and shortens the service life. SUMMARY

[0004] The application is proposed in view of the above problems in the prior art, and provides a force increasing device based on hydraulic logic automatic reversing, which can reduce the reversing frequency and improve the service life.

[0005] The application can be implemented by the following technical scheme:

[0006] A force increasing device based on hydraulic logic automatic reversing has a P port, a T port and an H port, and comprises:

[0007] A cylinder body has an oil cavity, and the P port and the T port are communicated with the oil cavity, and the oil cavity further has a first signaling hole, a second signaling hole, a third signaling hole and a fourth signaling hole;

[0008] A piston is movably arranged in the oil cavity, and a piston rod of the piston is provided with a first annular groove and a second annular groove along a circumferential surface thereof, when the piston is located at the leftmost end of the oil cavity, the first annular groove is communicated with the second signaling hole, and when the piston is located at the rightmost end of the oil cavity, the second annular groove is communicated with the third signaling hole;

[0009] A logic valve group is communicated with the P port and the T port, and the first signaling hole, the second signaling hole, the third signaling hole and the fourth signaling hole are communicated with the logic valve group;

[0010] A main hydraulic reversing valve is communicated with the P port and the T port and the oil cavity through the main hydraulic reversing valve, and the logic valve group is communicated with two ends of the main hydraulic reversing valve, wherein a part of the oil entering the P port enters the oil cavity;

[0011] Part of the oil entering through P port is outputted to both ends of the main hydraulic directional valve by the logical valve group to make the main hydraulic directional valve reverse;

[0012] Part of the oil entering through P port is outputted to both ends of the main hydraulic directional valve by the logical valve group to make the main hydraulic directional valve reverse;

[0013] As a further improvement of the present application, the logical valve group is provided with at least two groups, and the two groups of logical valve groups have the same number of logical valves.

[0014] As a further improvement of the present application, one group of the logical valve group is composed of a first logical valve and a second logical valve, and the other group of the logical valve group is composed of a third logical valve and a fourth logical valve, and the second logical valve and the fourth logical valve are respectively communicated with the P port.

[0015] As a further improvement of the present application, the first logical valve is communicated with the first signaling hole and the second signaling hole, and the third logical valve is communicated with the third signaling hole and the fourth signaling hole.

[0016] As a further improvement of the present application, the first logical valve, the second logical valve, the third logical valve and the fourth logical valve are sequentially connected.

[0017] As a further improvement of the present application, both ends of the main hydraulic directional valve have a P1 cavity and a P2 cavity.

[0018] As a further improvement of the present application, the second logical valve and the third logical valve are communicated with the P1 cavity, and the fourth logical valve is communicated with the P2 cavity.

[0019] As a further improvement of the present application, the oil cavity includes a main oil cavity, a first branch oil cavity and a second branch oil cavity located on both sides of the main oil cavity, the first signaling hole is located at the outer end of the first branch oil cavity, the second signaling hole is located at the inner end of the first branch oil cavity, the third signaling hole is located at the inner end of the second branch oil cavity, and the fourth signaling hole is located at the outer end of the second branch oil cavity.

[0020] As a further improvement of the present application, when the piston is located at the leftmost end of the oil cavity, the flow of the P port reaches the first branch oil cavity and the second branch oil cavity respectively, the fourth signaling hole is in a high pressure state and makes the third logical valve in an upper position, the flow of the P port also outputs high pressure to the P1 cavity through the second logical valve, the second logical valve also outputs high pressure signals to the third logical valve and the fourth logical valve, and makes the fourth logical valve in an upper position to output low pressure to the P2 cavity, so that the main hydraulic directional valve is in a left position, and the flow of the P port flows through the main hydraulic directional valve and enters the left cavity of the main oil cavity to make the piston right.

[0021] As a further improvement of the present application, when the piston is at the rightmost end of the oil cavity, the fourth signaling hole is covered by the piston, the third signaling hole is connected to the T port through the second annular groove, the third and fourth logic valves are reset, the fourth logic valve outputs a high pressure signal to the P2 cavity and the first logic valve, and the high pressure signal output by the first logic valve causes the second logic valve to be in a lower position and output a low pressure signal to the PI cavity. At this time, the main hydraulic directional valve is in the right position, and the flow of the P port enters the oil cavity of the main oil cavity after passing through the main hydraulic directional valve and causes the piston to move left.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. The switching of the cylinder body can only be realized when the first annular groove is connected to the second signaling hole or the second annular groove is connected to the third signaling hole. The position cooperation of the second signaling hole, the third signaling hole, the first annular groove, and the second annular groove increases the moving stroke of the piston and greatly increases the volume of the oil cavity. In the case of unchanged cylinder size, the piston stroke can be increased by 120%. Thus, the piston can push more super-high pressure oil outwards in one switching stroke, thereby greatly reducing the switching frequency and improving the service life of the entire supercharger.

[0024] 2. Better flow control: By adjusting the state of multiple logic valves, the flow of fluid in the system can be more flexibly adjusted to achieve more precise flow control to meet different working requirements, such as changing the valve switching speed in different states by changing the size of the different logic valve throttling ports. Multiple valve combinations can achieve multiple functions, increase control freedom, and significantly enhance the energy saving and controllability of traditional valve logic control systems.

[0025] 3. Easy maintenance and diagnosis: The system of multiple logic valves is easier to maintain and diagnose. By monitoring the state of each logic valve, problems that occur during each movement process can be more easily located, such as problems such as oscillation pressure relief during left and right movement processes, or problems such as collision noise at left and right limit positions. The corresponding control valve can be directly found to facilitate problem solving and preventive maintenance.

[0026] 4. Increased system flexibility: The combination of multiple logic valves can provide greater system configuration flexibility. According to needs, specific logic valves can be selected to be activated or disabled to adapt to different working conditions.

[0027] 5. Improved reliability: The use of multiple logic valves can improve the reliability of the system, and the reduction of the switching frequency of a single valve can improve its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the power amplification device of the present invention when the piston is at the far left end;

[0029] Figure 2 This is a schematic diagram of the principle of the force-boosting device of the present invention when the piston moves to the right;

[0030] Figure 3 This is a schematic diagram of the power amplification device of the present invention when the piston is at the rightmost end;

[0031] Figure 4 This is a schematic diagram of the principle of the force-boosting device of the present invention when the piston moves to the left;

[0032] Figure 5 This is a schematic diagram of the principle of the booster device of the present invention when the piston is located at the far left end.

[0033] In the figure, 100, cylinder body; 101, main oil chamber; 102, first branch oil chamber; 103, second branch oil chamber; 110, first transmitting hole; 120, second transmitting hole; 130, third transmitting hole; 140, fourth transmitting hole; 150, hydraulic pump;

[0034] 200, piston; 210, first annular groove; 220, second annular groove;

[0035] 300, first logic valve; 310, second logic valve; 320, third logic valve; 330, fourth logic valve;

[0036] 400. Main hydraulic reversing valve. DETAILED DESCRIPTION

[0037] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0038] like Figures 1-5 As shown, the present invention provides a booster device based on hydraulic logic automatic reversing, having a P port, a T port, and an H port. The P port is a hydraulic pump and is used to provide high-pressure oil to input a high-pressure signal. The T port is an oil tank and is used to collect return oil to input a low-pressure signal. The H port is the outlet of the ultra-high-pressure oil generated by the system, including:

[0039] The cylinder body 100 has an oil chamber, and the P port and the T port are respectively connected to the oil chamber. The oil chamber also has a first transmitting hole 110, a second transmitting hole 120, a third transmitting hole 130 and a fourth transmitting hole 140;

[0040] A piston 200 is movably arranged in the oil cavity, a piston rod of the piston 200 is provided with a first annular groove 210 and a second annular groove 220 along a circumferential surface thereof, when the piston 200 is located at a leftmost end of the oil cavity, the first annular groove 210 is in communication with the second signal hole 120, when the piston 200 is located at a rightmost end of the oil cavity, the second annular groove 220 is in communication with the third signal hole 130;

[0041] A logic valve group, the P port and the T port are in communication with the logic valve group, the first signal hole 110, the second signal hole 120, the third signal hole 130 and the fourth signal hole 140 are in communication with the logic valve group respectively;

[0042] A main hydraulic directional valve 400, the P port and the T port are further in communication with the oil cavity through the main hydraulic directional valve 400, the logic valve group is in communication with two ends of the main hydraulic directional valve 400, wherein,

[0043] Part of the oil entering the P port enters the oil cavity;

[0044] Part of the oil entering the P port is output to two ends of the main hydraulic directional valve 400 through the logic valve group as a high pressure signal and a low pressure signal, so that the main hydraulic directional valve 400 is reversed;

[0045] Part of the oil entering the P port enters the oil cavity and drives the piston 200 to move left or right after passing through the reversed main hydraulic directional valve 400, so as to achieve the purpose of reversing.

[0046] Specifically, when the piston 200 is at the leftmost end of the oil cavity, after the oil entering the P port, the logic valve group transmits the high pressure signal to the left cavity of the main hydraulic directional valve 400 and transmits the low pressure signal to the right cavity of the main hydraulic directional valve 400, at this time, the main hydraulic directional valve 400 is in the left position, the oil entering the P port enters the left cavity of the oil cavity after passing through the main hydraulic directional valve 400 and drives the piston 200 to move right;

[0047] When the piston 200 moves to the rightmost end of the oil cavity, the logic valve group transmits the high pressure signal to the right cavity of the main hydraulic directional valve 400 and transmits the low pressure signal to the left cavity of the main hydraulic directional valve 400, so that the main hydraulic directional valve 400 is reversed, then the oil entering the P port enters the right cavity of the oil cavity after passing through the main hydraulic directional valve 400 and drives the piston 200 to move left, thereby reciprocating.

[0048] It is worth mentioning here that the reversing of the cylinder 100 needs to be realized through the communication of the first annular groove 210 with the second signaling hole 120 or the communication of the second annular groove 220 with the third signaling hole 130, and in the embodiment, through the position cooperation of the second signaling hole 120, the third signaling hole 130 and the first annular groove 210 and the second annular groove 220, the moving stroke of the piston is increased, and the volume of the oil chamber is greatly increased, and in the case of the same size of the cylinder, the stroke of the piston can be increased by 120%, so that the piston 200 can push more ultrahigh pressure oil outwards in one reversing stroke, thereby greatly reducing the reversing frequency and improving the service life of the entire supercharger.

[0049] In addition, the arrangement of the logic valve group also brings the following advantages:

[0050] 1. Better flow control: By adjusting the state of multiple valves, the flow of fluid in the system can be more flexibly adjusted to achieve more precise flow control to meet different working requirements, such as changing the valve reversing speed in different states by changing the size of the different logic valve throttling holes. Multiple valve combinations can increase the degree of freedom of control and significantly enhance the energy saving and controllability of traditional valve logic control systems;

[0051] 2. Easy maintenance and diagnosis: The system of multiple valves is easier to maintain and diagnose. By monitoring the state of each valve, problems in each movement process can be easily located, such as oscillation pressure relief in left and right movement processes, or collision noise at left and right limit positions, etc. The corresponding control valve can be directly found to facilitate problem solving and preventive maintenance;

[0052] 3. Increased system flexibility: The combination of multiple valves can provide greater flexibility in system configuration. According to needs, specific valves can be activated or disabled to adapt to different working conditions;

[0053] 4. Improved reliability: The use of multiple valves can improve the reliability of the system, and the reduction of the reversing frequency of a single valve can improve its service life.

[0054] Preferably, the logic valve group has at least two groups, and the number of logic valves in the two groups of logic valve groups is the same, i.e. the number of logic valves in the logic valve group is an even number, but the specific number is not specifically limited.

[0055] For better illustration, in the embodiment, the logic valve group preferably includes four logic valves, one group of logic valves is composed of the first logic valve 300 and the second logic valve 310, and the other group of logic valves is composed of the third logic valve 320 and the fourth logic valve 330, and the second logic valve 310 and the fourth logic valve 330 are respectively communicated with the P port.

[0056] Wherein, the first logic valve 300 is in communication with the first signaling hole 110 and the second signaling hole 120, the third logic valve 320 is in communication with the third signaling hole 130 and the fourth signaling hole 140, and the first logic valve 300, the second logic valve 310, the third logic valve 320 and the fourth logic valve 330 are connected in sequence.

[0057] Preferably, the two ends of the main hydraulic directional valve 400 have a P1 cavity and a P2 cavity, the P1 cavity is the left cavity of the main hydraulic directional valve 400, and the P2 cavity is the right cavity of the main hydraulic directional valve 400.

[0058] Further, the second logic valve 310 and the third logic valve 320 are in communication with the P1 cavity, and the first logic valve 300 and the fourth logic valve 330 are in communication with the P2 cavity.

[0059] Preferably, the oil cavity includes a main oil cavity 101 and a first branch oil cavity 102 and a second branch oil cavity 103 located on both sides of the main oil cavity 101, the first signaling hole 110 is located at the outer end of the first branch oil cavity 102, the second signaling hole 120 is located at the inner end of the first branch oil cavity 102, the third signaling hole 130 is located at the inner end of the second branch oil cavity 103, and the fourth signaling hole 140 is located at the outer end of the second branch oil cavity 103.

[0060] Specifically, the P port is provided with a hydraulic pump 150, before the hydraulic pump 150 is started (as shown), there is no oil flow in the hydraulic system, the main hydraulic directional valve 400 is in the middle position, and the first logic valve 300, the second logic valve 310, the third logic valve 320 and the fourth logic valve 330 are in the lower position under the action of the spring. Figure 1 As shown, it is assumed that the initial position of the piston 200 is at the leftmost end of the oil cavity before the hydraulic pump 150 is started, and after the hydraulic pump 150 is started, the flow output by the hydraulic pump 150 reaches the first branch oil cavity 102 and the second branch oil cavity 103, at this time the fourth signaling hole 140 is in a high pressure state and makes the third logic valve 320 in the upper position, and the flow output by the hydraulic pump 150 also reaches the main hydraulic directional valve 400, the second logic valve 310 and the fourth logic valve 330, the high pressure signal output by the second logic valve 310 reaches the P1 cavity of the main hydraulic directional valve 400, at this time the P1 cavity is high pressure, and the high pressure signal output by the second logic valve 310 also reaches the third logic valve 320 and then reaches the fourth logic valve 330, so that the fourth logic valve 330 is in the upper position and outputs a low pressure signal to the P2 cavity of the main hydraulic directional valve 400, under the action of the high pressure in the P1 cavity and the low pressure in the P2 cavity, the main hydraulic directional valve 400 is in the left position, and the oil entering the P port passes through the main hydraulic directional valve 400 and enters the left cavity of the main oil cavity 101 and makes the piston 200 move to the right.

[0061] Figure 1 As shown, it is assumed that the initial position of the piston 200 is at the leftmost end of the oil cavity before the hydraulic pump 150 is started, and after the hydraulic pump 150 is started, the flow output by the hydraulic pump 150 reaches the first branch oil cavity 102 and the second branch oil cavity 103, at this time the fourth signaling hole 140 is in a high pressure state and makes the third logic valve 320 in the upper position, and the flow output by the hydraulic pump 150 also reaches the main hydraulic directional valve 400, the second logic valve 310 and the fourth logic valve 330, the high pressure signal output by the second logic valve 310 reaches the P1 cavity of the main hydraulic directional valve 400, at this time the P1 cavity is high pressure, and the high pressure signal output by the second logic valve 310 also reaches the third logic valve 320 and then reaches the fourth logic valve 330, so that the fourth logic valve 330 is in the upper position and outputs a low pressure signal to the P2 cavity of the main hydraulic directional valve 400, under the action of the high pressure in the P1 cavity and the low pressure in the P2 cavity, the main hydraulic directional valve 400 is in the left position, and the oil entering the P port passes through the main hydraulic directional valve 400 and enters the left cavity of the main oil cavity 101 and makes the piston 200 move to the right.

[0062] As​Figure 2 As shown, during the rightward movement of the piston 200, the first signal transmitting port 110 is in a high-pressure state and places the first logic valve 300 in the upper position. Since the fourth logic valve 330 outputs a low-pressure signal to the first logic valve 300, the second logic valve 310 continues to remain in the lower position under the action of the spring. The piston 200 continues to move rightward and continuously pushes the ultra-high-pressure oil in the second branch oil chamber 103 outward and into the H port.

[0063] like Figure 3 As shown, when the piston 200 moves to the rightmost end of the oil chamber, the piston 200 covers the fourth signal transmitting hole 140. At this time, the third signal transmitting hole 130 is connected to the second annular groove 220 on the piston 200 and is connected to the oil tank T, so that the third signal transmitting hole 130 and the fourth signal transmitting hole 140 both become low-pressure signals, thereby causing the third logic valve 320 to reset under the action of the spring. The third logic valve 320 outputs a low-pressure signal to the fourth logic valve 330 and resets the fourth logic. The high-pressure signal output by the fourth logic valve 330 reaches the P2 chamber of the main hydraulic reversing valve 400 and the first logic valve 300 respectively, causing the P2 chamber to be in a high-pressure state. At this time, the first transmitting port 110 still outputs a high-pressure signal, while the second transmitting port 120 is blocked by the piston 200. Therefore, the first logic valve 300 continues to be in the upper position under the high-pressure signals from the first and second transmitting ports 110 and 120, and outputs a high-pressure signal to put the second logic valve 310 in the upper position. The second logic valve 310 outputs a low-pressure signal to the P1 chamber of the main hydraulic reversing valve 400. Under the action of the low pressure in the P1 chamber and the high pressure in the P2 chamber, the main hydraulic reversing valve 400 is in the right position. The oil entering the P port flows through the main hydraulic reversing valve 400 and enters the right chamber of the main oil chamber 101, causing the piston 200 to move left.

[0064] like Figure 4 As shown, during the leftward movement of the piston 200, the high-pressure signal output by the fourth signal transmitting port 140 places the third logic valve 320 in the upper position. However, since the second logic valve 310 outputs a low-pressure signal to the third logic valve 320, the fourth logic valve 330 can continue to remain in position under the action of the spring. The piston 200 continues to move leftward and continuously pushes the ultra-high-pressure oil in the first oil chamber 102 outward and into the H port.

[0065] like Figure 5As shown, when the piston 200 moves to the left end of the oil cavity, the piston 200 covers the first signaling hole 110, and the second signaling hole 120 is connected to the oil tank T through the first annular groove 210 on the piston 200, so that the first signaling hole 110 and the second signaling hole 120 both become low-pressure signals, thereby the first logic valve 300 can be reset under the action of the spring, the first logic valve 300 outputs a low-pressure signal to the second logic valve 310 and resets it, and the high-pressure signal output by the second logic valve 310 reaches the P1 cavity of the main hydraulic directional valve 400 and the third logic valve 320. The fourth signaling hole 140 still outputs a high-pressure signal at this time, and the third signaling hole 130 is covered by the piston 200, so that the third logic valve 320 is continuously in the upper position under the action of the high-pressure signals of the third signaling hole 130 and the fourth signaling hole 140, and outputs a low-pressure signal to the P2 cavity of the main hydraulic directional valve 400. Under the action of the high pressure in the P1 cavity and the low pressure in the P2 cavity of the main hydraulic directional valve 400, the main hydraulic directional valve 400 is in the left position, and the oil entering the P port flows through the main hydraulic directional valve 400 and enters the left cavity of the main oil cavity 101 and makes the piston 200 move right.

[0066] Thus, the reciprocating cycle is realized to achieve full-automatic bidirectional pressurization.

[0067] The technical means disclosed in the technical scheme of the present application is not limited to the technical means disclosed in the above technical means, and also includes technical schemes composed of any combination of the above technical features. The above is the specific embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, which are also considered as the protection scope of the present application.

[0068] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0069] In addition, the description of "first", "second", "one" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0070] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

Claims

1. A force-boosting device based on hydraulic logic automatic reversing, having a P port, a T port, and an H port, characterized in that: include: The cylinder body has an oil chamber, the P port and the T port are respectively connected to the oil chamber, and the oil chamber also has a first transmitting hole, a second transmitting hole, a third transmitting hole and a fourth transmitting hole; a piston movably disposed in the oil chamber, wherein a piston rod of the piston has a first annular groove and a second annular groove formed along its circumferential surface; when the piston is located at the leftmost end of the oil chamber, the first annular groove communicates with the second signal transmitting hole; and when the piston is located at the rightmost end of the oil chamber, the second annular groove communicates with the third signal transmitting hole; Logic valve group, the P port and the T port are respectively connected to the logic valve group, and the first signal transmitting hole, the second signal transmitting hole, the third signal transmitting hole, and the fourth signal transmitting hole are respectively connected to the logic valve group; The main hydraulic reversing valve, the P port and the T port are also connected to the oil chamber through the main hydraulic reversing valve, and the logic valve group is connected to both ends of the main hydraulic reversing valve, wherein, A portion of the oil entering from the P port enters the oil chamber; A portion of the oil entering the P port outputs high-pressure and low-pressure signals to both ends of the main hydraulic reversing valve through the logic valve group, causing the main hydraulic reversing valve to perform reversing. A portion of the oil entering from the P port passes through the main hydraulic reversing valve after reversal and enters the oil chamber to push the piston to move left or right; When there are two logic valve groups, one group of the logic valve groups consists of a first logic valve and a second logic valve, and the other group of the logic valve groups consists of a third logic valve and a fourth logic valve, and the second logic valve and the fourth logic valve are respectively connected to the P port; The first logic valve is in communication with the first signal transmitting hole and the second signal transmitting hole, and the third logic valve is in communication with the third signal transmitting hole and the fourth signal transmitting hole; The oil chamber includes a main oil chamber and a first branch oil chamber and a second branch oil chamber located on both sides of the main oil chamber. The first sending hole is located at the outer end of the first branch oil chamber, the second sending hole is located at the inner end of the first branch oil chamber, the third sending hole is located at the inner end of the second branch oil chamber, and the fourth sending hole is located at the outer end of the second branch oil chamber.

2. A force-boosting device based on hydraulic logic automatic reversing according to claim 1, characterized in that: The first logic valve, the second logic valve, the third logic valve, and the fourth logic valve are connected in sequence.

3. The force-boosting device based on hydraulic logic automatic reversing according to claim 1, characterized in that: The two ends of the main hydraulic reversing valve are provided with a P1 cavity and a P2 cavity.

4. A force-boosting device based on hydraulic logic automatic reversing according to claim 3, characterized in that: The second logic valve and the third logic valve are in communication with the P1 chamber, and the fourth logic valve is in communication with the P2 chamber.

5. The force-boosting device based on hydraulic logic automatic reversing according to claim 3, characterized in that: When the piston is located at the leftmost end of the oil chamber, the flow of the P port reaches the first branch oil chamber and the second branch oil chamber respectively, the fourth signal transmitting hole is in a high-pressure state and the third logic valve is placed in the upper position, and the flow of the P port also outputs high pressure to the P1 chamber through the second logic valve. The second logic valve also outputs a high-pressure signal to the third logic valve and the fourth logic valve, and places the fourth logic valve in the upper position to output low pressure to the P2 chamber, so that the main hydraulic reversing valve is in the left position. After the flow of the P port flows through the main hydraulic reversing valve, oil enters the left chamber of the main oil chamber and causes the piston to move right.

6. A force-boosting device based on hydraulic logic automatic reversing according to claim 5, characterized in that: When the piston is located at the rightmost end of the oil chamber, the piston covers the fourth sending hole, the third sending hole is connected to the T port through the second annular groove, the third sending hole and the fourth sending hole are converted into low-pressure signals, the third logic valve and the fourth logic valve are reset, the fourth logic valve outputs a high-pressure signal to the P2 chamber, the first logic valve and the second logic valve are placed in the upper position and output a low-pressure signal to the P1 chamber, at this time the main hydraulic reversing valve is in the right position, the flow of the P port flows through the main hydraulic reversing valve and then enters the right chamber of the main oil chamber and causes the piston to move left.

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