Piston rod convenient to disassemble and assemble for hydraulic cylinder

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and relates to a hydraulic cylinder piston rod convenient to disassemble and assemble, which comprises a base and a piston rod connected with the base, a butt joint groove connected with the base is arranged on the lower end face of the piston rod, a positioning hole penetrating through the base is arranged on the base, threads are arranged on the inner wall of the positioning hole, and a positioning rod is in threaded connection in the positioning hole. A clamping piece is arranged on the end face of the base around the positioning hole and comprises a plurality of fixing blocks arranged around the positioning hole, mounting blocks are arranged between the fixing blocks and the positioning hole and correspond to the fixing blocks, fixing plates are hinged to the mounting blocks, the fixing plates are connected with the fixing blocks through first springs, and embedded blocks are arranged at the ends of the fixing plates. A clamping groove allowing the embedded block to be embedded is formed in the inner wall of the butt joint groove, and an elastic extrusion piece used for extruding the fixing plate is arranged at the end of the positioning rod so that the embedded block can be clamped into the clamping groove; compared with the prior art, the piston rod can be quickly assembled and disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, and more specifically, to a piston rod for a hydraulic cylinder which is easy to disassemble and assemble. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device.

[0003] For example, authorization announcement number CN220134586U discloses a hydraulic cylinder with a piston rod that is easy to disassemble and assemble. The piston disc can be embedded in the groove and the groove at the end of the piston rod body through an elastic clip. At the same time, it is further reinforced by a positioning ring. While ensuring the stability of the connection between the two, disassembly and installation are also convenient enough, and the practicality will be higher.

[0004] However, in the above scheme, the elastic clamp is embedded into the piston rod by the elastic force of the spring, but there is no effective means to compress the spring on the installed elastic clamp, so that the piston rod cannot be removed quickly. Although the efficiency of piston rod assembly is improved, the disassembly process becomes troublesome. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a piston rod for a hydraulic cylinder that can realize quick assembly and quick disassembly of the piston rod and the cylinder body.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A piston rod for a hydraulic cylinder that is easy to disassemble and assemble comprises a base and a piston rod connected to the base, wherein a docking groove connected to the base is provided on the lower end surface of the piston rod, a positioning hole penetrating the base is provided on the base, a thread is provided on the inner wall of the positioning hole, a positioning rod is connected to the thread in the positioning hole, and a clamping piece is provided around the positioning hole on the end surface of the base.

[0008] The clamping member comprises a plurality of fixing blocks arranged around the positioning hole, a mounting block is arranged between the fixing block and the positioning hole, the mounting block is arranged corresponding to the fixing block, a fixing plate is hingedly connected to the mounting block, the fixing plate and the fixing block are connected by a spring, an embedding block is arranged at the end of the fixing plate, and a clamping groove for embedding the embedding block is arranged on the inner wall of the docking groove.

[0009] The end of the positioning rod is provided with an elastic extrusion piece for extruding the fixing plate so as to clamp the embedding block into the clamping groove.

[0010] The utility model is further configured as follows: the elastic extrusion member includes a plurality of rotating blocks, a positioning column and an extrusion plate hingedly connected to the rotating block, the rotating block is arranged around the positioning column, the extrusion plate is arranged corresponding to the fixed plate, a spring 2 is arranged between the extrusion plate and the positioning column, and a thread is opened on the outer wall of the positioning rod.

[0011] The utility model is further configured as follows: a hexagonal mounting hole is opened on the lower end surface of the positioning rod, and a screw tool is provided corresponding to the hexagonal mounting hole. The screw tool is L-shaped, and the end of the screw tool is adapted to the hexagonal mounting hole so that the positioning rod can be tightened or removed by the screw tool.

[0012] The utility model is further configured as follows: a clamp is provided at the connection between the piston rod and the clamping piece.

[0013] The utility model is further configured as follows: the length of the positioning rod is adapted to the base and the clamping piece.

[0014] Compared with the shortcomings of the prior art, the beneficial effects of the utility model are:

[0015] By setting a positioning rod threadedly connected to the base, when the piston rod needs to be fixed to the base, under normal circumstances, several fixing plates are conical. At this time, the clamping piece is extended into the docking groove, and then the positioning rod is screwed into the positioning hole. The extrusion plate squeezes the fixing plate under the action of elastic force, so that the embedded block is clamped into the clamping groove, thereby realizing the connection between the piston rod and the base. When disassembly is required, it is only necessary to take the positioning rod out of the positioning hole by a screwdriver, thereby realizing quick installation and quick removal of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the installation of an embodiment of the utility model.

[0019] Base 1, piston rod 2, docking groove 3, positioning hole 4, positioning rod 5, clamping piece 6, fixing block 7, mounting block 8, fixing plate 9, spring 1 10, embedding block 11, clamping groove 12, rotating block 13, positioning column 14, extrusion plate 15, spring 2 16, hexagonal mounting hole 17, screw 18, clamp 19. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] like Figures 1 to 3 As shown,

[0023] A piston rod for a hydraulic cylinder which is easy to disassemble and assemble comprises a base 1 and a piston rod 2 connected to the base 1, a docking groove 3 connected to the base 1 is provided on the lower end surface of the piston rod 2, a positioning hole 4 penetrating the base 1 is provided on the base 1, a thread is provided on the inner wall of the positioning hole 4, a positioning rod 5 is connected to the inner thread of the positioning hole 4, a hexagonal mounting hole 17 is provided on the lower end surface of the positioning rod 5, a screw tool 18 is provided corresponding to the hexagonal mounting hole 17, the screw tool 18 is L-shaped, and the L-shaped screw tool 18 is more convenient for operators to use, and the end of the screw tool 18 is adapted to the hexagonal mounting hole 17 so that the positioning rod 5 can be tightened or removed by the screw tool 18.

[0024] A clamping piece 6 is provided around the positioning hole 4 on the end face of the base 1, and a clamping hoop 19 is provided at the connection between the piston rod 2 and the clamping piece 6. The length of the positioning rod 5 is adapted to the base 1 and the clamping piece 6 to prevent the lower end face of the positioning rod 5 from being placed outside the base 1 and affecting the operation of the hydraulic cylinder.

[0025] The clamping member 6 includes a plurality of fixing blocks 7 arranged around the positioning hole 4, a mounting block 8 is provided between the fixing block 7 and the positioning hole 4, the mounting block 8 is arranged corresponding to the fixing block 7, a fixing plate 9 is hingedly connected to the mounting block 8, the fixing plate 9 and the fixing block 7 are connected by a spring 10, an embedding block 11 is provided at the end of the fixing plate 9, and a clamping groove 12 for the embedding block 11 to be embedded in the inner wall of the docking groove 3, and the connection between the base 1 and the piston rod 2 is realized by the embedding block 11 being inserted into the clamping groove 12.

[0026] An elastic extrusion piece for extruding the fixed plate 9 is provided at the end of the positioning rod 5 so as to insert the embedded block 11 into the card slot 12. The elastic extrusion piece includes a plurality of rotating blocks 13, a positioning column 14 and an extrusion plate 15 hingedly connected to the rotating block 13. The rotating block 13 is arranged around the positioning column 14, and the extrusion plate 15 is arranged corresponding to the fixed plate 9. A spring 2 16 is provided between the extrusion plate 15 and the positioning column 14. A thread is provided on the outer wall of the positioning rod 5. By extending the positioning rod 5 into the positioning hole 4, under the elastic force of the spring 2 16, the extrusion plate 15 squeezes the fixed plate 9, so that the embedded block 11 is embedded in the card slot 12 to achieve fixation.

[0027] Working principle: when installation is required, the positioning rod 5 is placed outside the base 1. At this time, several fixing plates 9 are in a cone shape. At this time, the clamping piece 6 is extended into the docking groove 3, and then the extrusion plate 15 is contracted, and the positioning rod 5 is inserted into the positioning hole 4. Then, the positioning rod 5 is screwed into the hexagonal mounting hole 17 through the screw device 18 until the extrusion plate 15 is dispersed under the elastic force of the spring 16, and the fixing plate 9 is squeezed out, so that the embedded block 11 on the fixing plate 9 is embedded in the slot 12, and then the hoop 19 is fixed to the outer wall of the piston rod 2 to further fix the piston rod 2 and the clamping piece 6. When disassembly is required, the positioning rod 5 is unscrewed through the screw device 18. When the extrusion plate 15 is separated from the fixing plate 9, under the elastic force of the spring 10, the fixing plate 9 returns to the cone shape, and the embedded block 11 is separated from the slot 12, so as to realize the disassembly of the piston rod 2 and the base 1.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A piston rod for a hydraulic cylinder that is easy to disassemble and assemble, comprising a base (1) and a piston rod (2) connected to the base (1), wherein a lower end surface of the piston rod (2) is provided with a docking groove (3) connected to the base (1), characterized in that: The base (1) is provided with a positioning hole (4) penetrating the base (1), the inner wall of the positioning hole (4) is provided with a thread, the inner thread of the positioning hole (4) is connected to a positioning rod (5), and the end surface of the base (1) is provided with a clamping piece (6) around the positioning hole (4). The clamping member (6) comprises a plurality of fixing blocks (7) arranged around the positioning hole (4); a mounting block (8) is arranged between the fixing block (7) and the positioning hole (4); the mounting block (8) is arranged corresponding to the fixing block (7); a fixing plate (9) is hingedly connected to the mounting block (8); the fixing plate (9) and the fixing block (7) are connected via a spring (10); an embedding block (11) is arranged at the end of the fixing plate (9); and a clamping groove (12) for embedding the embedding block (11) is arranged on the inner wall of the docking groove (3). An elastic extrusion piece for extruding the fixing plate (9) is provided at the end of the positioning rod (5) so as to clamp the embedding block (11) into the clamping groove (12).

2. The easily disassembled piston rod for a hydraulic cylinder according to claim 1, characterized in that: The elastic extrusion member comprises a plurality of rotating blocks (13), a positioning column (14) and an extrusion plate (15) hingedly connected to the rotating block (13); the rotating block (13) is arranged around the positioning column (14); the extrusion plate (15) is arranged corresponding to the fixed plate (9); a second spring (16) is arranged between the extrusion plate (15) and the positioning column (14); and a thread is provided on the outer wall of the positioning rod (5).

3. The easily disassembled piston rod for a hydraulic cylinder according to claim 2, characterized in that: The lower end surface of the positioning rod (5) is provided with a hexagonal mounting hole (17), and a screwdriver (18) is provided corresponding to the hexagonal mounting hole (17). The screwdriver (18) is L-shaped, and the end of the screwdriver (18) is adapted to the hexagonal mounting hole (17) so that the positioning rod (5) can be tightened or removed by the screwdriver (18).

4. The easily disassembled piston rod for a hydraulic cylinder according to claim 3, characterized in that: A clamp (19) is provided at the connection between the piston rod (2) and the clamping piece (6).

5. The easily disassembled piston rod for a hydraulic cylinder according to claim 4, characterized in that: The length of the positioning rod (5) is adapted to the base (1) and the clamping member (6).

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