Hydraulic cylinder with locking mechanism

Abstract

The hydraulic cylinder with the locking mechanism comprises a hydraulic cylinder body, a supporting base and a sealing top cover, the hydraulic cylinder body is arranged on the supporting base, two sets of oil pipes are arranged on the side wall of the hydraulic cylinder body and located at the bottom and the top of the side wall of the hydraulic cylinder body respectively, an oil inlet pipe is communicated with the interior of the hydraulic cylinder body, and an oil outlet pipe is communicated with the interior of the hydraulic cylinder body. The sealing top cover is arranged at the top of the hydraulic cylinder body, a sealing piston is arranged in the hydraulic cylinder body in a sliding mode, a piston rod is arranged on the sealing piston, the other end of the piston rod penetrates through the sealing top cover and extends to the outside, and a self-locking structure is further arranged at the bottom of the sealing piston. The utility model relates to the technical field of hydraulic cylinders, and particularly provides a hydraulic cylinder with a locking mechanism, which has good bearing strength.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a locking mechanism. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a buffer device and an exhaust device. A self-locking hydraulic cylinder has a self-locking function. When the hydraulic system pressure disappears or the power is cut off, it can maintain a locked state in its position and will not cause unintentional displacement or loosening.

[0003] Existing self-locking hydraulic cylinders generally use steel balls to achieve self-locking of the hydraulic cylinder. The load-bearing capacity is average, and the cylinder wall is easy to deform when the load is large. In response to this, we have designed a new type of hydraulic cylinder with a locking mechanism. Utility Model Content

[0004] In view of the above situation, in order to make up for the above existing defects, the utility model provides a hydraulic cylinder with a locking mechanism having good bearing strength.

[0005] The utility model provides the following technical solutions: the utility model proposes a hydraulic cylinder with a locking mechanism, comprising a hydraulic cylinder body, a supporting base and a sealing top cover, wherein the hydraulic cylinder body is arranged on the supporting base, the side wall of the hydraulic cylinder body is provided with an oil pipe, the oil pipe is provided with two groups respectively located at the bottom and the top of the side wall of the hydraulic cylinder body, the oil pipe is communicated with the interior of the hydraulic cylinder body, the sealing top cover is arranged on the top of the hydraulic cylinder body, a sealing piston is slidably provided in the hydraulic cylinder body, a piston rod is provided on the sealing piston, the other end of the piston rod passes through the sealing top cover and extends to the outside, and a self-locking structure is also provided at the bottom of the sealing piston.

[0006] Furthermore, the self-locking structure includes a support plate, a connecting buffer assembly and a guide rod, the support plate is slidably arranged on the inner side wall of the hydraulic cylinder body, a recessed platform 1 is provided on the support plate, a recessed platform 2 is provided at the bottom of the sealing piston, the connecting buffer assembly is arranged in the recessed platform 1, the top of the connecting buffer assembly is connected to the recessed platform 2, the guide rod is arranged on the top of the support plate, the sealing piston is provided with a plug hole corresponding to the guide rod, a self-locking cavity is provided in the sealing piston, a self-locking rod is slidably arranged in the self-locking cavity, a supporting spring is provided on the inner side wall of the self-locking cavity, the supporting spring is provided on the inner side wall of the self-locking cavity and is connected to one end of the self-locking rod, a recessed platform 1 is provided in the middle of the self-locking rod, a protrusion 1 corresponding to the recessed platform 1 is provided on the top of the guide rod, a recessed platform 2 is provided on the side wall of the hydraulic cylinder body, and a protrusion 2 corresponding to the recessed platform 2 is provided on the other end of the self-locking rod.

[0007] Furthermore, the connecting buffer assembly includes a buffer support shell, a support slide, a return spring and a connecting column, the buffer support shell is arranged on the inner bottom wall of the first recess, the inner side wall of the buffer support shell is provided with a guide slide groove, the support slide plate is slidably arranged in the guide slide groove, the return spring is arranged on the inner bottom wall of the buffer support shell and is connected to the support slide plate, one end of the connecting column is arranged on the support slide plate, and the other end of the connecting column passes through the buffer support shell and is connected to the top wall of the second recess.

[0008] Furthermore, the guide rods, self-locking rods and support springs are evenly distributed in multiple groups with the vertical central axis of the hydraulic cylinder body as the center.

[0009] Furthermore, a plurality of grooves 2 are provided at equal intervals along the length direction of the hydraulic cylinder body.

[0010] The utility model proposes a hydraulic cylinder with a locking mechanism, and the beneficial effects achieved by adopting the above structure are as follows:

[0011] The sealing piston and the support plate are elastically connected through the connection buffer assembly. During use, the return spring in the connection buffer assembly is in an extruded state, and the protrusion 1 of the guide rod is inserted into the groove 1 in the middle of the self-locking rod to achieve free movement. When the oil pipe stops supplying oil, the sealing piston and the support plate are separated by the action of the return spring, and the protrusion 1 is separated from the groove 1. The self-locking rod is extended by the thrust of the support spring, and the protrusion 2 is inserted into the nearest group of grooves 2 to achieve rapid self-locking. When oil is supplied, the self-locking rod is retracted and unlocked due to the mutual extrusion of the protrusion 1 and the groove 1. The multiple groups of self-locking rods work together to bear the force evenly and resist the load evenly, so that the hydraulic cylinder body has good load resistance and anti-deformation ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the overall structure of a hydraulic cylinder with a locking mechanism proposed by the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of a hydraulic cylinder with a locking mechanism proposed by the utility model;

[0015] Figure 3 for Figure 2 A partial enlarged schematic diagram of part A.

[0016] Among them, 1. hydraulic cylinder body, 2. support base, 3. sealing top cover, 4. oil pipe, 5. sealing piston, 6. piston rod, 7. support plate, 8. connecting buffer assembly, 9. guide rod, 10. recessed platform 1, 11. recessed platform 2, 12. self-locking chamber, 13. self-locking rod, 14. support spring, 15. groove 1, 16. groove 2, 17. buffer support shell, 18. support slide plate, 19. reset spring, 20. connecting column, 21. guide slide groove. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] like Figures 1 to 3 As shown, the technical solution adopted by the utility model is as follows: a hydraulic cylinder with a locking mechanism, comprising a hydraulic cylinder body 1, a supporting base 2 and a sealing top cover 3, the hydraulic cylinder body 1 is arranged on the supporting base 2, the side wall of the hydraulic cylinder body 1 is provided with an oil pipe 4, the oil pipe 4 has two groups respectively located at the bottom and top of the side wall of the hydraulic cylinder body 1, the oil pipe 4 is connected with the interior of the hydraulic cylinder body 1, the sealing top cover 3 is arranged at the top of the hydraulic cylinder body 1, a sealing piston 5 is slidably provided in the hydraulic cylinder body 1, a piston rod 6 is provided on the sealing piston 5, the other end of the piston rod 6 passes through the sealing top cover 3 and extends to the outside, and a self-locking structure is also provided at the bottom of the sealing piston 5.

[0020] like Figure 2 and Figure 3As shown, the self-locking structure includes a support plate 7, a connecting buffer assembly 8 and a guide plug rod 9. The support plate 7 is slidably arranged on the inner side wall of the hydraulic cylinder body 1. A recess 10 is provided on the support plate 7. A recess 2 11 is provided at the bottom of the sealing piston 5. The connecting buffer assembly 8 is arranged in the recess 10. The top of the connecting buffer assembly 8 is connected to the recess 2 11. The guide plug rod 9 is arranged on the top of the support plate 7. A plug hole corresponding to the guide plug rod 9 is provided on the sealing piston 5. A self-locking chamber 12 is provided in the sealing piston 5. A self-locking rod 13 is slidably arranged in the self-locking chamber 12. A support spring 14 is provided on the inner side wall of the self-locking chamber 12. The support spring 14 is arranged on the inner side wall of the self-locking chamber 12 and is connected to one end of the self-locking rod 13. A recess 15 is provided in the middle of the self-locking rod 13. A convex block 1 corresponding to the recess 15 is provided on the top of the guide plug rod 9. The side of the hydraulic cylinder body 1 A groove 16 is provided on the wall, and a protrusion 16 is provided at the other end of the self-locking rod 13 corresponding to the groove 16. The connecting buffer assembly 8 includes a buffer support shell 17, a support slide 18, a reset spring 19 and a connecting column 20. The buffer support shell 17 is arranged on the inner bottom wall of the concave platform 10, and a guide slide 21 is provided on the inner side wall of the buffer support shell 17. The support slide 18 is slidably arranged in the guide slide 21. The reset spring 19 is arranged on the inner bottom wall of the buffer support shell 17 and is connected to the support slide 18. One end of the connecting column 20 is arranged on the support slide 18, and the other end of the connecting column 20 passes through the buffer support shell 17 and is connected to the top wall of the concave platform 11. The guide plug rod 9, the self-locking rod 13 and the support spring 14 are evenly distributed in multiple groups with the vertical central axis of the hydraulic cylinder body 1 as the center of the circle, and multiple groups of grooves 16 are equidistantly arranged along the length direction of the hydraulic cylinder body 1.

[0021] When in use, two groups of oil pipes 4 are connected to the external oil delivery equipment to realize oil supply and oil extraction. When one group of oil pipes 4 is supplying oil, the other group of oil pipes 4 is in the oil extraction state to drive the operation of the oil cylinder. The sealing piston 5 and the support plate 7 are connected through the connecting buffer assembly 8. During normal use, the supporting plate 7 and the sealing piston 5 cooperate to press the connecting buffer assembly 8 so that the protrusion 1 of the guide rod is inserted into the groove 15 in the middle of the self-locking rod 13. When the oil supply is stopped, the reset spring 19 in the connecting buffer assembly 8 pushes the support plate 7 to separate from the sealing piston 5, so that the protrusion 1 is separated from the groove 15, and the self-locking rod 13 is extended by the thrust of the support spring 14, and the protrusion 2 is inserted into the nearest group of grooves 2 16 to realize rapid self-locking.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, material or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, material or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder with a locking mechanism, comprising a hydraulic cylinder body, a supporting base and a sealing top cover, characterized in that: The hydraulic cylinder body is arranged on a supporting base, and an oil pipe is arranged on the side wall of the hydraulic cylinder body. The oil pipe has two groups respectively located at the bottom and the top of the side wall of the hydraulic cylinder body, and the oil pipe is communicated with the interior of the hydraulic cylinder body. The sealing top cover is arranged on the top of the hydraulic cylinder body, and a sealing piston is slidingly arranged in the hydraulic cylinder body. A piston rod is arranged on the sealing piston, and the other end of the piston rod passes through the sealing top cover and extends to the outside. A self-locking structure is also arranged at the bottom of the sealing piston.

2. A hydraulic cylinder with a locking mechanism according to claim 1, characterized in that: The self-locking structure includes a support plate, a connecting buffer assembly and a guide rod, the support plate is slidably arranged on the inner wall of the hydraulic cylinder body, the support plate is provided with a recessed platform 1, the bottom of the sealing piston is provided with a recessed platform 2, the connecting buffer assembly is arranged in the recessed platform 1, the top of the connecting buffer assembly is connected to the recessed platform 2, the guide rod is arranged on the top of the support plate, the sealing piston is provided with a plug hole corresponding to the guide rod, a self-locking cavity is provided in the sealing piston, a self-locking rod is slidably arranged in the self-locking cavity, the inner side wall of the self-locking cavity is provided with a support spring, the support spring is arranged on the inner side wall of the self-locking cavity and is connected to one end of the self-locking rod, the middle part of the self-locking rod is provided with a recessed platform 1, the top of the guide rod is provided with a convex block 1 corresponding to the recessed platform 1, the side wall of the hydraulic cylinder body is provided with a recessed platform 2, and the other end of the self-locking rod is provided with a convex block 2 corresponding to the recessed platform 2.

3. A hydraulic cylinder with a locking mechanism according to claim 2, characterized in that: The connecting buffer assembly includes a buffer support shell, a support slide, a return spring and a connecting column. The buffer support shell is arranged on the inner bottom wall of the concave platform one, and the inner side wall of the buffer support shell is provided with a guide slide groove. The support slide plate is slidably arranged in the guide slide groove. The return spring is arranged on the inner bottom wall of the buffer support shell and is connected to the support slide plate. One end of the connecting column is arranged on the support slide plate, and the other end of the connecting column passes through the buffer support shell and is connected to the top wall of the concave platform two.

4. A hydraulic cylinder with a locking mechanism according to claim 3, characterized in that: The guide plug rods, the self-locking rods and the support springs are evenly distributed in multiple groups with the vertical central axis of the hydraulic cylinder body as the center.

5. A hydraulic cylinder with a locking mechanism according to claim 4, characterized in that: The grooves 2 are arranged in multiple groups at equal intervals along the length direction of the hydraulic cylinder body.

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