CN114704529A - Self-locking hydraulic equipment - Google Patents

Abstract

The invention relates to the field of hydraulic equipment, and discloses self-locking hydraulic equipment which comprises a shell, a pump body and a cylinder body which are sequentially communicated through a pipeline, wherein a hydraulic control one-way valve is arranged on the pipeline communicated with the cylinder body, a circulation assembly is arranged in the shell and at a position corresponding to an oil outlet, the circulation assembly comprises a base fixedly connected with the shell and a circulation part fixedly connected with the base, an upper sleeve ring for dividing the circulation part into an upper passage layer and a lower passage layer is fixedly arranged on the outer surface of the circulation part, and a filter cover for covering the upper passage layer is fixedly arranged between the base and the upper sleeve ring. According to the invention, through the matching among the limiting component, the filter cover, the circulating component, the sealing component and the like, when the upper-passing layer is switched to the lower-passing layer for filtering, the movable area and the conveying area of the hydraulic oil cannot be changed, and the instantaneous circulation of the hydraulic oil can be ensured on the basis of ensuring effective filtering through switching, so that the oil supply and the integral use of the pump body are ensured.

Description

A self-locking hydraulic equipment

technical field

The invention relates to the technical field of hydraulic equipment, in particular to a self-locking hydraulic equipment.

Background technique

Hydraulic equipment is a machine that uses liquid as the working medium and is made according to Pascal's principle to transmit energy to realize various processes. Hydraulic equipment is generally composed of three parts: the machine (host), power system and hydraulic control system. It is often used to process products such as metal, plastic, rubber and wood, forming processes such as forging, stamping, cold extrusion, bending and flanging.

Chinese Patent Publication No. CN113577889B, discloses a hydraulic oil filter device for hydraulic equipment, including a filter housing, the upper ends of the filter housing are respectively fixedly connected with two oil inlet pipes and an oil outlet pipe, and the interior of the filter housing is fixed The main filter core is connected; the invention can improve the permeability of the filter, and can also use the auxiliary core ring block to continue to filter the hydraulic oil, so as to solve the problem that the existing filter needs to sacrifice the filtering effect to improve the permeability of the filter The problem.

When the device is switched to the auxiliary core ring block to filter the hydraulic oil, due to the limited size and space of the auxiliary core ring block, the instantaneous flow of hydraulic oil will be reduced, which will further reduce the oil supply to the oil outlet pipe, affecting the There are certain limitations in the transportation and overall use of the oil outlet.

Therefore, it is necessary to provide a self-locking hydraulic device to solve the above technical problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a self-locking hydraulic equipment to solve the problem that when switching to the auxiliary core ring block to filter the hydraulic oil in the above-mentioned background technology, due to the limited size and space of the auxiliary core ring block, the hydraulic oil will be reduced. The instantaneous flow rate will reduce the oil supply to the oil outlet pipe, and affect the transportation and overall use of the oil outlet pipe.

In order to achieve the above purpose, a design can ensure the permeability of filtration and the circulation of hydraulic oil, thereby ensuring the hydraulic oil delivery and overall use of the pump body.

Based on the above ideas, the present invention provides the following technical solution: a self-locking hydraulic device, comprising a casing, a pump body and a cylinder body connected in sequence through a pipeline, and a hydraulic control check valve is arranged on the pipeline connected to the cylinder body , the inside of the casing and the position corresponding to the oil outlet is provided with a circulation assembly, the circulation assembly includes a base fixedly connected with the casing and a circulation part fixedly connected with the base, and the outer surface of the circulation part is fixedly installed with the circulation part as the upper part. The upper collar of the passing layer and the lower passing layer, a filter cover that covers the upper passing layer is fixedly installed between the base and the upper collar; the interior of the casing is fixedly installed with a limit component that is movably fitted with the upper collar and The bottom plate is used to support the circulation assembly, the bottom of the casing is screwed with the closing assembly extending into the lower passage layer, and the inner part of the lower passage layer is fixedly installed with a ring that is movably fitted with the closing assembly.

As a further solution of the present invention: the upper passage layer, the lower passage layer and the filter cover are all arranged elastically, when the upper passage layer is in an open state, the lower passage layer is in a folded state, and when the lower passage layer is in a folded state In the open state, both the upper passing layer and the filter cover are in a folded state, and the filter cover is in contact with the inner wall of the casing.

As a further solution of the present invention: the upper through layer and the lower through layer are connected by a number of detours, each detour is composed of an upper oblique layer and a lower oblique layer, and the slope of the upper oblique layer and the lower oblique layer is formed. In opposite directions, the surfaces of the upper slant layer and the lower slant layer are both provided with a plurality of through holes.

As a further solution of the present invention: when the upper slant layer and the lower slant layer are in a folded state, the through holes on the upper slant layer and the through holes on the lower slant layer are in a dislocation state, and the interior of the through holes is fixedly installed with Strainer.

As a further solution of the present invention: a lower collar is fixedly installed on the outer surface of the lower through layer and away from the upper collar, and a spring is fixedly installed between the lower collar and the bottom plate; the shape of the upper collar and the lower collar is Fitted with magnetic materials, the upper collar and the lower collar are arranged with the same magnetic poles on the side close to the limiting component.

As a further solution of the present invention: the limiting assembly includes an upper magnetic ring and a lower magnetic ring that are fixedly connected to the inner wall of the housing, the lower magnetic ring is movably attached to the upper sleeve ring and is located below the upper magnetic ring, and the upper magnetic ring is located at the bottom of the upper magnetic ring. A long hole is formed through the surface.

As a further solution of the present invention, the upper magnetic ring and the lower magnetic ring are arranged with the same magnetic poles on the side close to the filter cover, and the magnetic poles of the upper magnetic ring/lower magnetic ring and the upper collar/lower collar are arranged in opposite directions.

As a further solution of the present invention, the number of the circular rings is set to two, and the two circular rings are respectively arranged in a one-to-one correspondence with the upper collar and the lower collar.

As a further solution of the present invention, the closure assembly includes a cover plate that is threadedly connected to the housing, and the surface of the cover plate is fixedly mounted with a clamping block that is movably fitted with both rings.

As a further solution of the present invention, an oil tank is fixedly installed under the pump body, the cylinder body and the casing, and the surface of the casing is connected to the oil tank through a pipeline.

As a further solution of the present invention, an inner magnetic ring is fixedly installed between two adjacent detour parts, and the magnetic poles of the inner magnetic ring are arranged up and down.

Compared with the prior art, the beneficial effect of the present invention is that the hydraulic oil will not be changed when the filter is switched from the upper pass layer to the lower pass layer through the cooperation between the limiting assembly, the filter cover, the circulation assembly and the closing assembly. On the basis of switching to ensure effective filtration, it can ensure the instantaneous flow of hydraulic oil, thereby ensuring the oil supply and overall use of the pump body. When the upper pass layer or the lower pass layer is used for filtration, the effective filtration of large and small debris in the hydraulic oil can be achieved to ensure the quality of the hydraulic oil delivered to the pump body. It plays the role of filtering larger debris. On the basis of switching to ensure effective filtering, it can save costs and be more practical.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention is further described:

1 is a perspective view of the overall structure of the present invention;

2 is a perspective view of the internal structure of the casing of the present invention;

3 is a schematic diagram of the structure of the upper pass layer of the present invention;

Figure 4 is an enlarged view of the structure at B in Figure 3;

Figure 5 is an enlarged view of the structure at A in Figure 2;

6 is a front cross-sectional view of the internal structure of the casing of the present invention;

Fig. 7 is an enlarged view of the structure at C in Fig. 6;

FIG. 8 is a schematic structural diagram of the limiting assembly of the present invention;

Fig. 9 is the structural schematic diagram after the opening of the passing layer under the present invention;

FIG. 10 is a schematic diagram of the structure of the inner magnetic ring of the present invention.

In the figure: 1. Housing; 2. Limiting component; 3. Filter cover; 4. Circulation component; 5. Closing component; 6. Bottom plate; 7. Ring; 8. Cylinder block; 9. Pump body; 10. Oil inlet pipe; 11. Fuel tank; 201, Upper magnetic ring; 202, Lower magnetic ring; hole; 405, lower collar; 406, lower through layer; 407, inner magnetic ring; 501, cover plate; 502, clamping block.

Detailed ways

Example 1:

Referring to FIGS. 1 to 6 , an embodiment of the present invention provides a self-locking hydraulic device, which mainly realizes effective filtration when the hydraulic device is used for a long time. The hydraulic device includes an oil tank 11 and a casing connected to the oil tank 11 through a pipeline. 1. The pump body 9 connected to the housing 1 through the oil inlet pipe 10 and the cylinder body 8 fixedly installed on the oil tank 11. The pump body 9 is connected to the cylinder body 8 through the pipeline. In this embodiment, the pump body 9 is connected to the cylinder body. There are two pipelines connected to 8, respectively corresponding to the two ends of the cylinder block 8 for feeding oil, and the reciprocating movement of the piston rod in the cylinder block 8 is realized through the oil feeding at both ends. There is a hydraulic control check valve (not shown in the figure) on the pipeline connected to the cylinder block 8, which can realize automatic locking when the hydraulic oil is circulated, and prevent the cylinder block 8 from falling rapidly when in use. Among them, the oil tank 11, the pump body 9. The cylinder block 8, the pipeline, the oil inlet pipe 10 and the hydraulic control check valve are all existing mature technologies, and will not be described in detail here.

Inside the casing 1 and at the position corresponding to the oil inlet pipe 10, a circulation assembly 4 is provided. The circulation assembly 4 includes a base 401 fixedly connected with the inner top wall of the casing 1 and a circulation part fixedly connected with the base 401. The outer surface of the circulation part is fixed An upper collar 403 that divides the circulation part into an upper through layer 402 and a lower through layer 406 is installed; a filter cover 3 covering the upper through layer 402 is fixedly installed between the base 401 and the upper collar 403, and the filter cover 3 can filter For larger impurities in the hydraulic oil, the cross section of the filter cover 3 is designed in an arc shape. The upper pass layer 402 and the lower pass layer 406 can filter the smaller impurities in the hydraulic oil. In actual use, in order to save costs, the filter cover may not be installed. 3. Both the circulation part and the filter cover 3 are of elastic design. When the upper passage layer 402 is in an open state, the lower passage layer 406 is in a folded state. When the lower passage layer 406 is in an open state, the upper passage layer 402 and the filter cover 3 are in an open state. They are all in a folded state, and the filter cover 3 is in contact with the inner side wall of the housing 1; when it is in the open state, the hydraulic oil can flow normally, when it is in the folded state, the liquid is turned into a partition, and the upper through layer 402 is in the open state in the initial state In the open state, the lower pass layer 406 is in the folded state. Inside the casing 1 is fixedly installed a limit component 2 that is movably fitted with the upper collar 403 and used to realize the positioning of the upper pass layer 402 , and is fixedly installed inside the shell 1 and below the limit component 2 for supporting the circulation. The bottom plate 6 of the assembly 4, the casing 1 is designed with an open bottom, and the lower part of the casing 1 is threadedly connected with the closing assembly 5 extending into the lower passage layer 406, and the interior of the lower passage layer 406 is fixedly installed with the closing assembly 5. Closed ring 7.

In this embodiment, it is preferred: when in use, start the pump body 9 to pump oil from the oil tank 11 through the casing 1 and the pipeline, and deliver the hydraulic oil to the cylinder block 8 through the pipeline, and the hydraulic oil passes through the filter cover 3 and the upper The layer 402 is then transported to the cylinder block 8 through the oil inlet pipe 10 and the pipeline to realize the corresponding movement of the cylinder block 8. When passing through the filter cover 3, the larger debris is filtered out, and the smaller debris is passed through the upper layer. 402 stopped. As the use time increases, the upper pass layer 402 filters a large amount of small impurities, which reduces the flow of hydraulic oil, and at the same time, a certain amount of large impurities will accumulate on the filter cover 3, resulting in the transport through the upper pass layer 402. The amount of hydraulic oil supplied to the oil feed pipe 10 is reduced, so that the negative pressure in the upper passage layer 402 becomes larger and larger; when the negative pressure in the upper passage layer 402 is too large, the upper collar 403 can be driven to separate from the limit assembly 2, After the upper collar 403 is separated from the limiting component 2, it will rise vertically along the inner wall of the housing 1, and when it rises to the limit component 2, the limit is completed again, and the upper through layer 402 is formed during this process. The filter cover 3 is folded and deflected and press-fitted with the inner side wall of the housing 1 .

When the upper collar 403 moves, the lower pass layer 406 will be changed from the folded state to the open state, while the closing element 5 is still in contact with the ring 7, so that the flow of the flow is stable; The hydraulic oil inside will first pass through the folded filter cover 3, and then pass through the lower pass layer 406. The filter cover 3 still has the effect of filtering larger debris, while the lower pass layer 406 still plays the role of filtering smaller debris. Effect.

Through the cooperation of the structure of the limit component 2, the filter cover 3, the circulation component 4 and the closing component 5, when the filter is switched from the upper through layer 402 to the lower through layer 406, the movable area and delivery area of the hydraulic oil will not be changed. On the basis of switching to ensure effective filtration, the instantaneous flow of hydraulic oil can be ensured, thereby ensuring the oil supply and overall use of the pump body 9 . When filtering through the upper passing layer 402 and switching to the lower passing layer 406 for filtering, both large and small debris in the hydraulic oil can be effectively filtered to ensure the quality of the hydraulic oil delivered to the pump body 9. At the same time, the filter cover 3 can be respectively upper The pass-through layer 402 and the lower pass-through layer 406 play the role of filtering larger debris, and on the basis of switching to ensure effective filtering, more cost can be saved. The device utilizes the change of the amount of debris to realize the pressure change in the upper passing layer 402, and then automatically realizes the automatic switching between the upper passing layer 402 and the lower passing layer 406. After the upper passing layer 402 is switched to the folded state, it can be automatically turned into a closed state, The flow of hydraulic oil is blocked, and when the lower passage layer 406 is switched to open, it can be automatically turned into a circulating state, so as to ensure the filtering effect of hydraulic oil, and the overall practicability is higher.

Embodiment 2:

Referring to FIGS. 1 to 9 , on the basis of the first embodiment, the upper through layer 402 and the lower through layer 406 are connected by a plurality of detours, and each detour is connected by an upper sloping layer 4021 and a lower sloping layer 4022 The upper slope layer 4021 and the lower slope layer 4022 are inclined in opposite directions. In this embodiment, there are four detours. The upper slope layer 4021 is inclined upward to the right, and the lower slope layer 4022 is inclined downward to the right (the view from FIG. 3 ). The entire detour is similar in shape to the telescopic tube. Several through holes 404 are formed through the surfaces of the upper slope layer 4021 and the lower slope layer 4022. In this embodiment, there are four through holes 404 in each layer. The through holes 404 on the upper slope layer 4021 are opposite to the lower slope layer 4022. The upper through hole 404 is closer to the junction of the upper slope layer 4021 and the lower slope layer 4022, so that the through holes 404 of the two layers will not overlap when the upper slope layer 4021 and the lower slope layer 4022 are folded; therefore, the upper slope layer 4021 and the lower slope layer 4022 do not overlap. The through-holes 404 of the lower inclined layer 4022 can be arranged in various ways, which can correspond up and down, and can also be dislocated up and down, as long as there is no overlap after folding. In order to improve the filtering effect of hydraulic oil, a filter screen (not shown in the figure) is installed in the through hole 404 to filter fine impurities in the hydraulic oil. A lower collar 405 is fixedly installed on the side away from the upper collar 403 through the outer surface of the layer 406, and a spring is fixedly installed between the lower collar 405 and the bottom plate 6; the upper collar 403 and the lower collar 405 are shaped to match Both of them are made of magnetic material, and the magnetic poles of the two are arranged at the same side away from the lower pass layer 406 , that is, the outer magnetic poles of the upper collar 403 and the lower collar 405 are the same.

The limit assembly 2 includes an upper magnetic ring 201 and a lower magnetic ring 202 that are fixedly connected to the inner side wall of the housing 1 and are arranged up and down. 405 is located below the lower magnetic ring 202; the upper magnetic ring 201 and the lower magnetic ring 202 are arranged with the same magnetic poles on the side close to the filter cover 3, and the upper magnetic ring 201 (the lower magnetic ring 202) and the upper magnetic ring 403 (the lower magnetic ring 405) with opposite poles. In order to ensure smooth and large circulation of the liquid entering the casing 1 through the pipeline, a long hole is formed through the surface of the upper magnetic ring 201 . In order to avoid the contact of the filter cover 3 with the upper magnetic ring 201 and the lower magnetic ring 202 , the size of the filter cover 3 is set to be smaller than the upper collar 403 and the lower collar 405 . The size of the several detours of the lower pass layer 406 after folding is larger than the size of the opening of the lower magnetic ring 202 (time in FIG. 6 ), so that when the detours of the lower pass layer 406 rise through the lower magnetic ring 202 , they are in the same position as the lower magnetic ring 202 . 202 is in a fit state, which can prevent hydraulic oil from leaking through the lower magnetic ring 202 .

The number of the rings 7 is set to two, and the two rings 7 are respectively arranged in a position corresponding to the upper collar 403 and the lower collar 405 .

The closure assembly 5 includes a cover plate 501 that is threadedly connected to the inner bottom wall of the housing 1. The upper surface of the cover plate 501 is fixedly mounted with a clamping block 502 that is movably fitted with the upper ring 7. The clamping block 502 is designed in a T shape and penetrates through. Bottom plate 6 set. In order to ensure the sealing effect of the upper passage layer 402 and the lower passage layer 406 , the size of the clamping block 502 may be increased to make it fit with both rings 7 .

In this embodiment, it is preferable to start the pump body 9 through the cooperation of the casing 1, the oil inlet pipe 10, the filter cover 3 and the upper pass layer 402, etc., to deliver the hydraulic oil in the oil tank 11 to the cylinder block 8 for The movement of the cylinder body 8 is realized. During this process, the filter cover 3 filters the larger debris, and the through hole 404 of the upper pass layer 402 cooperates with the filter screen to catch the smaller debris. With the increase of use time, the accumulation of impurities on the upper pass layer 402 and the filter cover 3 increases, resulting in a decrease in the amount of hydraulic oil delivered to the oil feed pipe 10 through the upper pass layer 402, so that the negative pressure in the upper pass layer 402 becomes more and more When the negative pressure in the upper pass layer 402 is too large, it can drive the upper collar 403 to separate from the lower magnetic ring 202, and the upper collar 403 drives the upper pass layer 402 to rise vertically along the inner wall of the housing 1. The limit is completed after the upper magnetic ring 201 is movably attached. During this process, several circuitous parts are folded in sequence, and the filter cover 3 is folded and deflected and pressed and fitted with the inner side wall of the housing 1 .

When the upper collar 403 moves, it will drive the lower pass layer 406 to move synchronously, so that several detours in the folded state turn into the open state, and under the action of the spring, the lower collar 405 will rise vertically and align with the lower collar 405 . The magnetic ring 202 is movably attached to realize the limit; although the upper ring 403 will drive the upper ring 7 to move synchronously when moving, so that the upper ring 7 is separated from the clamping block 502, but the lower ring 7 is still attached to the clamping block 502. Therefore, the leakage of hydraulic oil will not occur during the movement of the upper passing layer 402. At the same time, after the lower collar 405 is attached to the lower magnetic ring 202, the lower ring 7 is still in the attached state of the clamping block 502. , the sealing effect of hydraulic oil can still be guaranteed. At this time, the hydraulic oil entering the casing 1 through the pipeline will first pass through the folded filter cover 3, and then pass through the through holes 404 on the lower pass layer 406 and the filter screen. The filter cover 3 still serves to filter larger debris. The lower pass layer 406 has the effect of filtering smaller impurities.

Through the cooperation of the lower magnetic ring 202 , the filter cover 3 , the detour portion and the clamping block 502 , when the filter is switched from the upper passage layer 402 to the lower passage layer 406 , the movable area of the hydraulic oil is still the space above the lower magnetic ring 202 , the transportable area of hydraulic oil is still a number of through holes 404, which will not change the movable area and transport area of hydraulic oil. On the basis of switching to ensure effective filtration, the instantaneous flow of hydraulic oil can be guaranteed, thereby ensuring the correct flow of hydraulic oil. The oil supply and overall use of the pump body 9. When filtering through the upper pass layer 402, the filter cover 3 can be used to effectively filter the large and small debris in the hydraulic oil. When switching to the lower pass layer 406 for filtering, the upper pass layer 402 can be automatically turned after switching to the folded state. In a closed state, the flow of hydraulic oil is blocked, and the filter cover 3 is folded and squeezed and deformed with the inner side wall of the housing 1, so that the larger debris on the filter cover 3 can be quickly dropped off, and the arc of the filter cover 3 The shape surface design can further reduce the accumulation of large debris on the filter cover 3. The deformed filter cover 3 can also effectively filter the large and small debris in the hydraulic oil with the lower pass layer 406, ensuring the hydraulic pressure delivered to the pump body 9. At the same time, there is no need to reconfigure the filter cover 3 for the lower passing layer 406, which also plays a cost-saving role on the basis of ensuring effective filtration. The device utilizes the change of the amount of debris on the filter screen to realize the pressure change in the upper passing layer 402, and then automatically realizes the automatic switching between the upper passing layer 402 and the lower passing layer 406. After the upper passing layer 402 is switched to a folded state, it can be automatically turned into a closed state state, the flow of hydraulic oil is blocked, and the lower passage layer 406 can be automatically turned into a circulating state when it is switched to open, which ensures the filtering effect of hydraulic oil and meets more needs in actual use.

Embodiment three:

Referring to FIGS. 1 to 10 , on the basis of the second embodiment, an inner magnetic ring 407 is fixedly installed between two adjacent detours, and the magnetic poles of the inner magnetic ring 407 are arranged up and down.

In order to ensure the stable lifting of the upper pass layer 402 and the lower pass layer 406 along the inner wall of the casing 1, a guide bracket can be installed on the inner wall of the casing 1 and located between the upper magnetic ring 201 and the lower magnetic ring 202. The hollow design and one end away from the inner side wall of the casing 1 is arc-shaped, which can play a role of fitting and guiding the upper collar 403 without affecting the flow of the liquid in the casing 1 .

In order to further avoid the leakage of hydraulic oil through the lower magnetic ring 202 when the upper passing layer 402 is switched to the lower passing layer 406, a thin film can be fixedly installed between the lower magnetic ring 202 and the lower collar 405 (not shown in the figure). shown), the film covers the lower passage layer 406 in the middle, which not only plays the role of blocking hydraulic oil, but also does not affect the movement of the lower passage layer 406 .

In this embodiment, it is preferred that when the upper collar 403 is separated from the lower magnetic ring 202 and drives the upper pass layer 402 to rise vertically along the inner wall of the casing 1, several detours are folded in sequence, and the inner magnetic ring is simultaneously folded. Under the action of 407, the corresponding lower sloping layer 4022 and upper sloping layer 4021 form an effective closure. During this process, the filter cover 3 is folded and deflected and pressed against the inner side wall of the housing 1. When the upper collar 403 moves to the The position limit is realized after being attached to the upper magnetic ring 201 . When the upper collar 403 moves, it will move synchronously through a number of detours of the layer 406. In the early stage of the movement, the detours will not open, but are in a folded state and cooperate with the spring to drive the lower collar 405 to move synchronously. After the lower collar 405 and the lower magnetic ring 202 are in contact with each other to achieve the position limit, several detours are gradually opened, and the inner inner magnetic ring 407 also begins to separate. At the same time, during the movement of the upper collar 403, the guide bracket can effectively guide the upper collar 403 to prevent it from being offset from the upper magnetic ring 201, and the setting of the film also plays a certain role in the movement of the lower collar 405. The guiding effect can prevent the lower collar 405 and the lower magnetic ring 202 from being offset.

In the second embodiment, although the automatic switching between the upper passing layer 402 and the lower passing layer 406 can be realized, so that the upper passing layer 402 is automatically turned into a folded state, it cannot be guaranteed that the through holes 404 on the upper passing layer 402 are completely closed, so that the upper passing layer 402 is completely closed. The switching speed between the passing layer 402 and the lower passing layer 406 is relatively slow, and at the same time, there may be a situation that the upper detour part of the upper passing layer 402 is not completely folded, and the detour part of the lower passing layer 406 cannot be opened, which will affect the oil supply and overall use. There are certain usage limitations. Compared with the second embodiment, through the cooperation of the inner magnetic ring 407, the film, the detour part and the guide bracket, when the upper pass layer 402 is deformed due to the pressure, the detour part of the upper pass layer 402 can be quickly completely folded. and closed, so that the circuitous part of the lower passage layer 406 can be quickly opened and turned into circulation, which effectively improves the switching speed between the upper passage layer 402 and the lower passage layer 406, and also ensures the stable circulation of hydraulic oil, thereby ensuring the oil supply. It can be used as a whole, and is better combined with the movement of the upper pass layer 402 and the lower pass layer 406; on the basis of improving the switching speed, this embodiment can also achieve effective guidance for the upper pass layer 402 and the lower pass layer 406. , so that it can be smoothly fitted with the upper magnetic ring 201 and the lower magnetic ring 202 respectively, and the applicability is stronger.

Claims (10)

1. A self-locking hydraulic device comprises a shell, a pump body and a cylinder body which are sequentially communicated through a pipeline, wherein a hydraulic control one-way valve is arranged on the pipeline communicated with the cylinder body; the inside fixed mounting of casing has the spacing subassembly of laminating with last lantern ring activity and is used for supporting the bottom plate of circulation subassembly, and the bottom threaded connection of casing has the ring that extends to down through intraformational closed assembly, and the inside fixed mounting on lower through layer has the activity laminating with closed assembly.

2. The self-locking hydraulic equipment according to claim 1, wherein the upper passage layer, the lower passage layer and the filter cover are all elastically arranged, when the upper passage layer is in an open state, the lower passage layer is in a folded state, when the lower passage layer is in an open state, the upper passage layer and the filter cover are both in a folded state, and the filter cover is attached to the inner wall of the housing.

3. The self-locking hydraulic equipment as claimed in claim 2, wherein the upper and lower pass-through layers are composed of a plurality of connecting parts, each connecting part is composed of an upper inclined layer and a lower inclined layer, the inclined directions of the upper inclined layer and the lower inclined layer are opposite, and a plurality of through holes are formed through the surfaces of the upper inclined layer and the lower inclined layer.

4. The self-locking hydraulic equipment as claimed in claim 3, wherein when the upper and lower inclined layers are in the folded state, the through holes on the upper inclined layer and the through holes on the lower inclined layer are in the dislocation state, and the inside of the through holes is fixedly provided with the filter screen.

5. The self-locking hydraulic equipment as claimed in claim 1, wherein a lower lantern ring is fixedly installed on one side of the outer surface of the lower pass layer, which is far away from the upper lantern ring, and a spring is fixedly installed between the lower lantern ring and the bottom plate; go up the lantern ring and all adopt magnetic material with lower lantern ring shape adaptation, go up the lantern ring and be the same setting of magnetic pole with one side that lower lantern ring is close to spacing subassembly.

6. The self-locking hydraulic equipment as claimed in claim 5, wherein the limiting assembly comprises an upper magnetic ring and a lower magnetic ring fixedly connected with the inner wall of the housing, the lower magnetic ring is movably attached to the upper lantern ring and is located below the upper magnetic ring, and a long hole is formed in the surface of the upper magnetic ring in a penetrating manner.

7. The self-locking hydraulic equipment as claimed in claim 6, wherein the upper and lower magnetic rings are arranged with the same magnetic poles on the side close to the filter housing, and the upper/lower magnetic rings are arranged with the opposite magnetic poles of the upper/lower lantern rings.

8. The self-locking hydraulic equipment as claimed in claim 5, wherein the number of the circular rings is two, and the two circular rings are respectively arranged in one-to-one correspondence with the upper and lower lantern rings.

9. The self-locking hydraulic equipment as claimed in claim 8, wherein the closing assembly comprises a cover plate in threaded connection with the housing, and a fixture block movably attached to both of the two rings is fixedly mounted on the surface of the cover plate.

10. The self-locking hydraulic device according to any one of claims 1 to 9, wherein an oil tank is fixedly mounted under the pump body, the cylinder body and the housing, and the surface of the housing is connected with the oil tank through a pipeline.

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