Self-resetting hydraulic system

Abstract

The utility model relates to the technical field of hydraulic pressure, and provides a self-resetting hydraulic system which comprises a base arranged at the bottom of a cylinder body, the base is provided with a containing space, and the containing space is connected with the cylinder body in a sealed mode. The check ring is arranged in the containing space and provided with a through hole. The vortex spring is arranged in the check ring; one end of the vortex spring penetrates through the through hole; one end of the connecting rope is arranged on the vortex spring and wound on the check ring, the other end of the connecting rope is arranged on the plunger, and after the plunger extends out, the connecting rope drives one end of the vortex spring to rotate. By means of the technical scheme, the problem that in the prior art, a hydraulic cylinder reset mechanism is short in service life is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pressure, in particular to a self-resetting hydraulic system. Background Art

[0002] The hydraulic cylinder is an actuator in the hydraulic transmission system, which converts hydraulic energy into mechanical energy to achieve linear reciprocating motion or swinging. It has a simple structure and reliable operation. When using a hydraulic cylinder to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission interval, and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. When the hydraulic cylinder is working, the hydraulic energy is converted into mechanical energy, and the plunger of the hydraulic cylinder will be thrust, thereby achieving reciprocating motion.

[0003] The hydraulic cylinder is usually filled with oil at both ends of the plunger to achieve the reciprocating movement of the plunger. However, if there is a power outage or other situations, the hydraulic cylinder may not be able to reset. In order to solve this problem, the prior art proposes a hydraulic cylinder with a spring added between the plunger and the cylinder body. The hydraulic cylinder stretches the spring. If the power supply is lost, the hydraulic cylinder can be reset by the elastic force of the spring. However, during use, the spring is continuously in a stretched state, and the spring is prone to failure due to long-term stretching, resulting in a short service life of the hydraulic cylinder reset mechanism and the need to frequently replace the spring. Utility Model Content

[0004] The utility model provides a self-resetting hydraulic system, which solves the problem of short service life of a hydraulic cylinder resetting mechanism in the related art.

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

[0006] A self-resetting hydraulic system, comprising a cylinder body and a plunger, includes:

[0007] A base, arranged at the bottom of the cylinder body, the base having a receiving space, and the receiving space is sealed and connected to the cylinder body;

[0008] A retaining ring is arranged in the accommodating space, and the retaining ring has a through hole;

[0009] A vortex spring is arranged in the retaining ring, and one end of the vortex spring passes through the through hole;

[0010] A connecting rope has one end arranged on the vortex spring and wound around the retaining ring, and the other end arranged on the plunger. After the plunger is extended, the connecting rope drives one end of the vortex spring to rotate.

[0011] Optionally, it also includes:

[0012] A guide wheel is rotatably arranged in the accommodating space, and the guide wheel guides the connecting rope from the vortex spring to the moving direction of the plunger.

[0013] Optionally, the cylinder body has a connecting groove, and the connecting rope passes through the connecting groove and is connected to the plunger.

[0014] Optionally, it also includes:

[0015] A sealing strip is arranged on the plunger, and a boss is provided on the sealing strip. The boss is sealingly slidably arranged in the connecting groove.

[0016] Optionally, the cylinder body has an A inlet, a B inlet and a drain port, the B inlet is connected to a hydraulic oil tank, the hydraulic oil tank is located higher than the cylinder body, the drain port is located at one end of the cylinder body close to the base, and the drain port is connected to another hydraulic oil tank, and further includes:

[0017] The electromagnetic valve is arranged at the liquid discharge port, and the liquid discharge port is closed after the electromagnetic valve is energized.

[0018] Optionally, there are two sealing strips, and the connection point between the connecting rope and the plunger is located on one side of the two sealing strips close to the base.

[0019] Optionally, the drain port is 1 / 10 of the inner diameter of the cylinder body.

[0020] The working principle and beneficial effects of the utility model are:

[0021] In the utility model, after the plunger is extended, the vortex spring will be compressed under the action of the connecting rope. Under the action of the vortex spring, the plunger can be reset even without providing power to the plunger. The compression deformation of the vortex spring is used to reset the plunger, which can increase the service life of the vortex spring. In addition, the vortex spring saves more space than ordinary springs and can meet more usage conditions. During use, oil is added to the cylinder body, the plunger converts hydraulic energy into mechanical energy, and the plunger is extended. During the extension of the plunger, the connecting rope is stretched, and the connecting rope compresses the vortex spring. The vortex spring accumulates force. When the plunger needs to retract, the plunger is reset under the action of the elastic force of the vortex spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 It is a schematic diagram of the structure inside the accommodating space of the utility model.

[0026] In the figure: 100, cylinder body, 200, plunger, 300, base, 310, accommodating space, 400, retaining ring, 410, through hole, 500, vortex spring, 600, connecting rope, 700, guide wheel, 110, connecting groove, 800, sealing strip, 810, boss, 120, liquid inlet A, 130, liquid inlet B, 140, liquid discharge port, 900, solenoid valve. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0028] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0029] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] Reference Figure 1~Figure 3, which is the first embodiment of the utility model, proposes a self-resetting hydraulic system, including a cylinder body 100 and a plunger 200, including a base 300 arranged at the bottom of the cylinder body 100, the base 300 has a receiving space 310, and the receiving space 310 is sealed and connected to the cylinder body 100; a retaining ring 400 is arranged in the receiving space 310, and the retaining ring 400 has a through hole 410; a vortex spring 500 is arranged in the retaining ring 400, and one end of the vortex spring 500 passes through the through hole 410; one end of a connecting rope 600 is arranged on the vortex spring 500 and is wound around the retaining ring 400, and the other end is arranged on the plunger 200. After the plunger 200 is extended, the connecting rope 600 drives one end of the vortex spring 500 to rotate.

[0032] In this embodiment, after the plunger 200 is extended, the vortex spring 500 will be compressed under the action of the connecting rope 600. Under the action of the vortex spring 500, the plunger 200 can be reset even if no power is provided to the plunger 200. The compression deformation of the vortex spring 500 is used to reset the plunger 200, which can increase the service life of the vortex spring 500. In addition, the vortex spring 500 saves more space than ordinary springs and can meet more usage conditions. During use, oil is added to the cylinder body 100, and the plunger 200 converts hydraulic energy into mechanical energy. The plunger 200 is extended, and the connecting rope 600 is stretched during the extension of the plunger 200. The connecting rope 600 compresses the vortex spring 500, and the vortex spring 500 accumulates force. When the plunger 200 needs to retract, the plunger 200 is reset under the action of the elastic force of the vortex spring 500.

[0033] Furthermore, the guide wheel 700 is rotatably disposed in the accommodating space 310 , and the guide wheel 700 guides the connecting rope 600 from the vortex spring 500 to the moving direction of the plunger 200 .

[0034] In this embodiment, the guide wheel 700 of the accommodating space 310 can change the reverse direction of the connecting rope 600, and the vortex spring 500 is arranged perpendicular to the moving direction of the plunger 200 to save more space. The guide wheel 700 guides the connecting rope 600 wound on the retaining ring 400 to the moving direction of the plunger 200. A plurality of connecting ropes 600 can be provided, and the winding directions of the plurality of connecting ropes 600 on the retaining ring 400 are the same. A plurality of guide wheels 700 are arranged around the retaining ring 400 at circumferential intervals. The connecting rope 600 can also extend from different squares and be connected to the plunger 200 at the same time, so that the force on the plunger 200 is more even.

[0035] Furthermore, the cylinder body 100 has a connecting groove 110 , and the connecting rope 600 passes through the connecting groove 110 and is connected to the plunger 200 .

[0036] In this embodiment, the connecting rope 600 is connected to the plunger 200 through the connecting groove 110, and the connecting groove extends from the accommodating space 310. The accommodating space 310 is a closed structure and will not affect the conversion of hydraulic energy into mechanical energy.

[0037] Furthermore, a sealing strip 800 is provided on the plunger 200 , and a boss 810 is provided on the sealing strip 800 . The boss 810 is sealingly slidably provided in the connecting groove 110 .

[0038] In this embodiment, the sealing strip 800 on the plunger 200 has a boss 810, which is sealingly slidably disposed in the connecting groove 110. The sealing strip 800 can seal the connecting groove 110 to prevent the front and rear spaces of the plunger 200 from being connected.

[0039] Furthermore, the cylinder body 100 has an A inlet 120, a B inlet 130 and a drain port 140, the B inlet 130 is connected to the hydraulic oil tank, the hydraulic oil tank is located higher than the cylinder body 100, the drain port 140 is located at one end of the cylinder body 100 close to the base 300, the drain port 140 is connected to another hydraulic oil tank, and also includes: a solenoid valve 900 is arranged at the drain port 140, and the solenoid valve 900 closes the drain port 140 after being energized.

[0040] In this embodiment, the use of the discharge port 140 allows the hydraulic cylinder to be provided with only one power device to realize the reciprocating motion of the plunger 200. During use, the A inlet 120 and the B inlet 130 are respectively located in the spaces on both sides of the plunger 200, and the B inlet 130 is connected to a hydraulic oil tank higher than the cylinder body 100. Gravity can be used to ensure that the space where the B inlet 130 is located is always filled with hydraulic oil to prevent the occurrence of a vacuum situation that affects the resetting of the plunger 200. The hydraulic oil is pumped into the cylinder body 100 from the A inlet 120. Under the action of the hydraulic oil, the plunger 200 moves toward the B inlet 130 to realize the extension of the cylinder. The B inlet 130 is connected to the hydraulic oil tank higher than the cylinder body 100. The hydraulic oil in the space where the hydraulic oil is located is squeezed into the hydraulic oil tank connected to it, and the A inlet 120 stops pumping hydraulic oil, and the plunger 200 remains stationary. When the power is cut off and the solenoid valve 900 is opened, the hydraulic oil in the space on the side of the A inlet 120 flows out from the discharge port 140 under the action of the vortex spring 500, and the plunger 200 is reset. The space at the B inlet 130 is refilled with hydraulic oil under the action of gravity. The hydraulic oil in the hydraulic oil tank connected to the B inlet 130 is constant, and its pressure is stable, which can ensure the stable reset of the plunger 200. The solenoid valve 900 adopts the form of closing when powered on and opening when powered off, so the hydraulic cylinder can still be reset when the power is lost.

[0041] Furthermore, there are two sealing strips 800 , and the connection point between the connecting rope 600 and the plunger 200 is located on one side of the two sealing strips 800 close to the base 300 .

[0042] In this embodiment, the two sealing strips 800 are respectively close to the two spaces of the cylinder body 100, and the connecting rope 600 is located on the side of the two sealing strips 800 close to the base 300, which can avoid affecting the sealing and isolation of the two spaces in the cylinder body 100 by the sealing strips 800.

[0043] Furthermore, the drain port 140 is 1 / 10 of the inner diameter of the cylinder body 100 .

[0044] In this embodiment, the drain port 140 is 1 / 10 of the inner diameter of the cylinder body 100. After the power supply is lost, the drain port 140 is opened. Since the diameter of the drain port 140 is small and the reset force of the plunger 200 is relatively stable, the smaller diameter drain port 140 can make the plunger 200 move more stably when resetting, preventing the plunger 200 from resetting too quickly to cause a safety accident or damage to the cylinder body 100.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A self-resetting hydraulic system, comprising a cylinder (100) and a plunger (200), It is characterized in that include: A base (300) is arranged at the bottom of the cylinder body (100), the base (300) having a receiving space (310), and the receiving space (310) is sealedly connected to the cylinder body (100); A retaining ring (400) is arranged in the accommodating space (310), and the retaining ring (400) has a through hole (410); A vortex spring (500) is arranged in the retaining ring (400), and one end of the vortex spring (500) passes through the through hole (410); A connecting rope (600) has one end disposed on the vortex spring (500) and wound around the retaining ring (400), and the other end disposed on the plunger (200); after the plunger (200) is extended, the connecting rope (600) drives one end of the vortex spring (500) to rotate.

2. A self-resetting hydraulic system according to claim 1, It is characterized in that Also includes: A guide wheel (700) is rotatably disposed in the accommodating space (310), and the guide wheel (700) guides the connecting rope (600) from the vortex spring (500) to the moving direction of the plunger (200).

3. A self-resetting hydraulic system according to claim 2, It is characterized in that The cylinder body (100) is provided with a communication groove (110), and the connection rope (600) passes through the communication groove (110) and is connected to the plunger (200).

4. A self-resetting hydraulic system according to claim 3, It is characterized in that Also includes: A sealing strip (800) is arranged on the plunger (200), and a boss (810) is provided on the sealing strip (800). The boss (810) is sealingly slidably arranged in the connecting groove (110).

5. A self-resetting hydraulic system according to claim 1, It is characterized in that The cylinder body (100) has an A liquid inlet (120), a B liquid inlet (130) and a liquid discharge port (140); the B liquid inlet (130) is connected to a hydraulic oil tank; the hydraulic oil tank is located higher than the cylinder body (100); the liquid discharge port (140) is located at one end of the cylinder body (100) close to the base (300); the liquid discharge port (140) is connected to another hydraulic oil tank; and further comprises: The solenoid valve (900) is arranged at the liquid discharge port (140), and the solenoid valve (900) closes the liquid discharge port (140) when energized.

6. A self-resetting hydraulic system according to claim 4, It is characterized in that There are two sealing strips (800), and the connection point between the connecting rope (600) and the plunger (200) is located on one side of the two sealing strips (800) close to the base (300).

7. A self-resetting hydraulic system according to claim 5, It is characterized in that The liquid discharge port (140) is 1 / 10 the size of the inner diameter of the cylinder body (100).

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