Anti-rotation type oil cylinder piston connecting structure easy to disassemble and assemble

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to an anti-rotation oil cylinder piston connecting structure easy to disassemble and assemble, which comprises a piston rod, a piston, a spacer ring, a flashboard and a connecting piece, the piston is assembled at the connecting end of the piston rod and protrudes towards the end face of the piston rod to form a plurality of connecting tables. Space for containing the flashboard is formed between every two adjacent connecting tables, the outer axial faces of the connecting tables are sleeved with the spacer rings, the connecting pieces are arranged in the spacer rings, the outer axial face of the connecting end of the piston rod is provided with a limiting groove, one end of the flashboard is connected with the spacer rings through the connecting pieces, and the other end of the flashboard is clamped in the limiting groove. The piston is effectively prevented from rotating in the operation process through the matching effect of the spacer ring, the gate plate and the connecting piece, reliable connection of the piston and the piston rod is achieved, the connection stability and reliability are enhanced, and damage to the piston and the piston rod is avoided; and during disassembly and assembly, the position of the flashboard can be adjusted only through the connecting piece, operation is easy, and the disassembly and assembly time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to an easy-to-disassemble anti-rotation cylinder piston connection structure. Background Technology

[0002] Hydraulic cylinders, as an important power output device, are widely used in various mechanical equipment, such as construction machinery, mining machinery, and metallurgical equipment. With the continuous development of industrial technology, the requirements for the performance and reliability of hydraulic cylinders are also getting higher and higher. Among them, the piston and piston rod, as one of the key components of hydraulic cylinders, directly affect the overall performance and service life of the cylinder.

[0003] In related technologies, the piston and piston rod are generally connected by a threaded connection and secured with a set screw. However, this connection method has several problems. First, the set screw can damage the original threads during use, making it prone to seizing during disassembly and assembly, and difficult to remove. Second, under harsh working conditions, the set screw is prone to falling off, which can lead to cylinder scoring, affecting the normal operation and service life of the hydraulic cylinder. In addition, the traditional threaded connection method requires a lot of time and effort to disassemble and assemble, increasing equipment maintenance costs and downtime, and reducing production efficiency.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background technology of this utility model, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an easy-to-disassemble anti-rotation hydraulic cylinder piston connection structure, which improves the convenience of piston assembly, disassembly and maintenance, and avoids damage to the piston rod and piston.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an easy-to-disassemble anti-rotation hydraulic cylinder piston connection structure, comprising: a piston rod, a piston, a spacer ring, a gate plate, and a connecting piece; the piston is assembled at the connecting end of the piston rod and protrudes toward the end face of the piston rod to form multiple connecting platforms;

[0007] The adjacent connecting platforms form a space to accommodate the gate plate. The spacer ring is sleeved on the outer axial surface of the connecting platform, and the connecting member is built into the spacer ring. The connecting end of the piston rod is provided with a limiting groove on its outer axial surface. One end of the gate plate is connected to the spacer ring through the connecting member, and the other end is locked in the limiting groove.

[0008] Furthermore, the connecting end of the piston rod includes an assembly section, a transition section, and a limiting section arranged coaxially. The shaft diameter of the transition section is larger than that of the assembly section, forming a stepped structure. The limiting groove is located on the outer shaft surface of the limiting section. The piston is sleeved on the assembly section and the transition section, and the connecting platform is connected to the limiting section through the gate and the limiting groove.

[0009] Furthermore, the piston has through holes at both ends, forming connecting holes. The end of the connecting hole facing the piston rod forms a stepped surface. The assembly section and the transition section are assembled in the connecting holes, and the stepped structure matches the stepped surface.

[0010] Furthermore, the outer shaft surface of the transition section is provided with an oil sealing groove, the oil sealing groove is annular, the sealing structure is disposed in the oil sealing groove and is disposed opposite to the step surface.

[0011] Furthermore, each of the gates has a first arc surface, a second arc surface, and two sliding surfaces. The first arc surface and the second arc surface are coaxially arranged, and the curvature of the first arc surface is the same as the curvature of the inner side surface of the spacer ring. The curvature of the second arc surface is the same as the curvature of the bottom of the limiting groove. The two sliding surfaces are arranged parallel to each other, and their two ends are respectively connected to the first arc surface and the second arc surface.

[0012] Furthermore, the spacer ring is provided with a mounting hole that runs through it radially. The mounting hole is provided corresponding to the gate plate. The connector is movably disposed in the mounting hole, and one end is fixedly connected to the second arc surface.

[0013] Furthermore, there are three of each of the connecting platforms and the gate, with adjacent connecting platforms having the same angular spacing.

[0014] Furthermore, each of the connecting platforms has two flat sides facing the gate, and is fitted to the sliding surfaces of the gates on both sides.

[0015] The beneficial effects of this utility model are as follows: This utility model achieves a reliable connection between the piston and the piston rod through the cooperation of the spacer ring, the gate plate, and the connecting parts, which not only enhances the connection stability and reliability but also avoids damage to the piston and piston rod. In addition, the cooperation between the gate plate and the limiting groove effectively prevents the piston from rotating during operation, ensuring the stable operation of the hydraulic cylinder. During disassembly and assembly, the position of the gate plate can be adjusted simply by using the connecting parts, making the operation simple, greatly shortening the disassembly and assembly time, and thus improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the easily disassembled and assembled anti-rotation hydraulic cylinder piston connection structure in an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the easily detachable anti-rotation hydraulic cylinder piston connection structure in the connected state in an embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the piston rod structure in an embodiment of the present utility model;

[0020] Figure 4 This is a side view of the piston in an embodiment of the present invention;

[0021] Figure 5 for Figure 4 Sectional view at point AA;

[0022] Figure 6 This is a schematic diagram of the spacer ring in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the gate structure in an embodiment of this utility model.

[0024] Reference numerals: 10, piston rod; 10a, assembly section; 10b, transition section; 10c, limiting section; 11, limiting groove; 12, sealing groove; 20, piston; 20a, connecting hole; 20b, stepped surface; 21, connecting platform; 30, spacer ring; 30a, assembly hole; 40, gate plate; 40a, first arc surface; 40b, second arc surface; 40c, sliding surface; 50, connecting piece. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] like Figures 1 to 7 The easily detachable anti-rotation hydraulic cylinder piston connection structure shown includes: piston rod 10, piston 20, spacer ring 30, gate plate 40 and connector 50; piston 20 is assembled at the connecting end of piston rod 10 and protrudes towards the end face of piston rod 10 to form multiple connecting platforms 21;

[0029] The adjacent connecting platforms 21 form a space to accommodate the gate plate 40. The spacer ring 30 is sleeved on the outer shaft surface of the connecting platform 21, and the connecting piece 50 is built into the spacer ring 30. The connecting end of the piston rod 10 is provided with a limiting groove 11 on the outer shaft surface. One end of the gate plate 40 is connected to the spacer ring 30 through the connecting piece 50, and the other end is stuck in the limiting groove 11.

[0030] This invention achieves a reliable connection between the piston 20 and the piston rod 10 through the cooperation of the spacer ring 30, the gate plate 40, and the connecting piece 50. This not only enhances the stability and reliability of the connection but also avoids damage to the piston 20 and the piston rod 10. In addition, the cooperation between the gate plate 40 and the limiting groove 11 effectively prevents the piston 20 from rotating during operation, ensuring the stable operation of the hydraulic cylinder. During disassembly and assembly, the position of the gate plate 40 can be adjusted simply by using the connecting piece 50, making the operation simple, greatly shortening the disassembly and assembly time, and thus improving production efficiency.

[0031] Specifically, the piston rod 10 and piston 20 work together to realize the power transmission and mechanical motion conversion of the hydraulic cylinder; the limiting groove 11 on the piston rod 10 provides precise positioning and stable support for the gate 40, ensuring that the gate 40 can firmly restrict the movement of the piston 20 and guarantee the stability and reliability of the connection structure; the connecting platform 21 on the piston 20 provides basic support and positioning for the installation of components such as the spacer ring 30 and the gate 40, ensuring that each component can be precisely and stably assembled together; the spacer ring 30 is sleeved on the outer axial surface of the connecting platform 21, providing installation space for the connecting part 50 and ensuring that the piston rod 10 and piston 20 are properly connected. The connection stability between the plugs 20 and the gate 40 can be confined within the space between the limiting groove 11, the spacer ring 30, and the connecting platform 21, thus playing a role in spacing and protection and helping to improve the tightness and reliability of the connection. The cooperation between the gate 40 and the limiting groove 11 can prevent the piston 20 from rotating and limit its abnormal axial movement, ensuring the stability of the connection between the piston 20 and the piston rod 10 during operation. The connecting piece 50 can control the locking and unlocking of the gate 40 in the limiting groove 11 by tightening or loosening the connecting piece 50, so as to realize the installation and disassembly of the piston 20, which is simple and convenient to operate.

[0032] Based on the above embodiments, the connecting end of the piston rod 10 includes an assembly section 10a, a transition section 10b, and a limiting section 10c arranged coaxially. The shaft diameter of the transition section 10b is larger than that of the assembly section 10a, forming a stepped structure. The limiting groove 11 is located on the outer shaft surface of the limiting section 10c. The piston 20 is sleeved on the assembly section 10a and the transition section 10b, and the connecting platform 21 is connected to the limiting section 10c through the gate plate 40 and the limiting groove 11. The coaxial arrangement of the assembly section 10a, the transition section 10b, and the limiting section 10c ensures that the piston 20 can be precisely assembled. The piston 20 is precisely aligned with the piston rod 10, avoiding assembly difficulties and uneven wear during operation caused by misalignment of the axes, thus ensuring operational stability. The stepped structure on the transition section 10b provides a clear positioning reference for the installation of the piston 20, preventing axial sliding of the piston 20 after it is assembled to the designated position and enhancing the reliability of the connection. The gate plate 40 is reliably connected to the limiting section 10c by cooperating with the connecting platform 21 and the limiting groove 11 at both ends, and the structural characteristics of the gate plate 40 effectively prevent the piston 20 from rotating.

[0033] Based on the above embodiment, the piston 20 is provided with through holes at both ends to form connecting holes 20a. The end of the connecting hole 20a facing the piston rod 10 forms a stepped surface 20b. The assembly section 10a and the transition section 10b are assembled in the connecting hole 20a, and the stepped structure matches the stepped surface 20b. The connecting hole 20a provides a clear channel and positioning for the assembly of the piston rod 10, enhancing the stability of the connection. The stepped surface 20b provides a precise positioning reference for the assembly of the piston 20 and the piston rod 10, ensuring that the piston 20 will not slide axially after being assembled to the designated position, further enhancing the reliability of the connection.

[0034] Based on the above embodiments, the outer shaft surface of the transition section 10b is provided with an oil sealing groove 12. The oil sealing groove 12 is annular, and the sealing structure is disposed in the oil sealing groove 12 and is disposed opposite to the step surface 20b. The oil sealing groove 12 provides an installation position for the sealing structure, so that the sealing structure can fit tightly against the outer shaft surface of the transition section 10b to form an effective seal and prevent oil leakage. The sealing structure is disposed opposite to the step surface 20b and is evenly distributed in the oil sealing groove 12 in the circumferential direction. This allows the sealing structure to be supported and restricted by the step surface 20b in the axial direction, which enhances the stability of the seal. At the same time, the constraint of the oil sealing groove 12 in the radial direction ensures that the sealing structure fits tightly against the outer shaft surface of the transition section 10b, effectively preventing oil leakage along the axial and radial directions, thereby providing a continuous sealing effect and avoiding leakage caused by local poor sealing.

[0035] Based on the above embodiments, each gate 40 has a first arc surface 40a, a second arc surface 40b, and two sliding surfaces 40c. The first arc surface 40a and the second arc surface 40b are coaxially arranged, and the curvature of the first arc surface 40a is the same as the curvature of the inner surface of the spacer ring 30, so that the gate 40 can fit against the inner surface of the spacer ring 30 when it moves out of the limiting groove 11, avoiding interference. The curvature of the second arc surface 40b is the same as the curvature of the bottom of the limiting groove 11, so that when the gate 40 moves into the limiting groove 11, the gate 40 and the piston rod 10 form a complete abutment, increasing the contact area. The two sliding surfaces 40c are arranged parallel to each other, and their two ends are connected to the first arc surface 40a and the second arc surface 40b respectively, forming a complete plate structure, which enhances the reliability and stability of the entire connection structure.

[0036] Based on the above embodiments, the spacer ring 30 is provided with a mounting hole 30a through it in the radial direction. The mounting hole 30a is correspondingly provided with the gate plate 40. The connector 50 is movably disposed in the mounting hole 30a, and one end is fixedly connected to the second arc surface 40b. The mounting hole 30a provides space for the connector 50 to be installed and moved, so that the connector 50 can pass smoothly through the spacer ring 30 and connect with the gate plate 40, realizing a flexible connection between the spacer ring 30 and the gate plate 40. Moreover, the spacer ring 30 can realize the force transmission between the connector 50 and the gate plate 40, preventing the gate plate 40 from loosening or falling off during operation, enhancing the reliability of the entire connection structure. The built-in structure improves the compactness of the overall structure and prevents interference or jamming during the movement of the piston 20.

[0037] Based on the above embodiments, three connecting platforms 21 and three gate plates 40 are provided, with adjacent connecting platforms 21 being spaced at the same angle. The arrangement of multiple connecting platforms 21 and gate plates 40 increases the number of connection points between the piston 20 and the piston rod 10, making the connection more robust and stable, better able to withstand various forces during operation, and preventing axial displacement and rotation of the piston 20. Furthermore, the design of the equally spaced connecting platforms 21 ensures that each connection point is evenly distributed, resulting in more uniform force distribution. This avoids excessive wear or damage to individual connection points due to uneven force distribution, extends the service life of the connection structure, and also helps to improve the operational balance and stability of the entire hydraulic cylinder.

[0038] Based on the above embodiments, the two sides of each connecting platform 21 facing the gate plate 40 are flat and are fitted with the sliding surfaces 40c of the two gate plates 40. The flatness of the two sides of the connecting platform 21 facing the gate plate 40 increases the contact area between the connecting platform 21 and the gate plate 40, resulting in more uniform force distribution and better force transmission and dispersion. In addition, the connecting platform 21 and the sliding surface 40c form a guiding effect during the gate's movement, enhancing the stability and reliability of the connection. At the same time, the flat fitting design helps reduce friction and wear between components and extends service life.

[0039] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An easily detachable and anti-rotation hydraulic cylinder piston connection structure, characterized in that, include: Piston rod, piston, spacer ring, gate, and connecting parts; The piston is assembled to the connecting end of the piston rod and protrudes toward the end face of the piston rod to form multiple connecting platforms; The adjacent connecting platforms form a space to accommodate the gate plate. The spacer ring is sleeved on the outer axial surface of the connecting platform, and the connecting member is built into the spacer ring. The connecting end of the piston rod is provided with a limiting groove on its outer axial surface. One end of the gate plate is connected to the spacer ring through the connecting member, and the other end is locked in the limiting groove.

2. The easily detachable anti-rotation hydraulic cylinder piston connection structure according to claim 1, characterized in that, The connecting end of the piston rod includes an assembly section, a transition section, and a limiting section arranged coaxially. The shaft diameter of the transition section is larger than that of the assembly section, forming a stepped structure. The limiting groove is located on the outer shaft surface of the limiting section. The piston is sleeved on the assembly section and the transition section, and the connecting platform is connected to the limiting section through the gate and the limiting groove.

3. The easily detachable anti-rotation hydraulic cylinder piston connection structure according to claim 2, characterized in that, The piston is provided with through holes at both ends to form connecting holes. The end of the connecting hole facing the piston rod forms a stepped surface. The assembly section and the transition section are assembled in the connecting holes, and the stepped structure matches the stepped surface.

4. The easily detachable anti-rotation hydraulic cylinder piston connection structure according to claim 3, characterized in that, The outer axial surface of the transition section is provided with an oil sealing groove. The oil sealing groove is annular, and the sealing structure is disposed in the oil sealing groove and is disposed opposite to the step surface.

5. The easily detachable anti-rotation hydraulic cylinder piston connection structure according to claim 1, characterized in that, Each of the gates has a first arc surface, a second arc surface, and two sliding surfaces. The first arc surface and the second arc surface are coaxially arranged, and the curvature of the first arc surface is the same as the curvature of the inner side surface of the spacer ring. The curvature of the second arc surface is the same as the curvature of the bottom of the limiting groove. The two sliding surfaces are arranged parallel to each other, and their two ends are respectively connected to the first arc surface and the second arc surface.

6. The easily detachable anti-rotation hydraulic cylinder piston connection structure according to claim 5, characterized in that, The spacer ring has a through-hole along the radial direction, the through-hole being corresponding to the gate plate, the connector being movably disposed in the through-hole, and one end being fixedly connected to the second arc surface.

7. The easily detachable anti-rotation hydraulic cylinder piston connection structure according to claim 6, characterized in that, There are three of each of the connecting platforms and the gate, and the intervals between adjacent connecting platforms are the same.

8. The easily detachable anti-rotation hydraulic cylinder piston connection structure according to claim 7, characterized in that, Each of the connecting platforms has two flat sides facing the gate, and is fitted to the sliding surfaces of the gates on both sides.

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