CN217440408U

CN217440408U - Split type piston anti-loosening structure and oil cylinder

Info

Publication number: CN217440408U
Application number: CN202220006526.0U
Authority: CN
Inventors: 邱永宁; 王强强; 刘飞飞; 袁飞
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-09-16
Anticipated expiration: 2032-01-05

Abstract

The utility model discloses a split type piston anti loosening structure, including the piston rod, threaded connection has piston and lock nut in proper order on the piston rod, and piston and lock nut's terminal surface laminates mutually and forms mounting groove, has the mounting hole along radially seting up in the mounting groove, is equipped with the steel ball in the mounting hole, and the right-hand member cover of piston is equipped with the clamping ring, and lock nut's left end cover is equipped with and keeps off the ring subassembly, and the clamping ring compresses tightly through piston and lock nut with the contact terminal surface that keeps off the ring subassembly, and the steel ball is located the clamping ring and keeps off the inboard of ring subassembly. An oil cylinder comprises a cylinder barrel, wherein the split type piston anti-loosening structure is arranged in the cylinder barrel. In this way, the utility model discloses split type piston anti loosening structure and hydro-cylinder can improve the locking effect of piston and piston rod, reduces the piston size, guarantees piston structure's compactness.

Description

Split type piston anti-loosening structure and oil cylinder

Technical Field

The utility model relates to a piston field especially relates to a split type piston anti loosening structure and hydro-cylinder.

Background

The piston plays an important role in the oil cylinder, and is matched with the sealing ring to block oil pressure of the large cavity and the small cavity and simultaneously plays a supporting role on the piston rod. However, during the use process, various failures of parts at the piston of the oil cylinder often occur, such as extrusion of a sealing ring, loosening of the thread of the piston, breakage of the thread part and the like. The piston is used as an important part of the oil cylinder and circularly and reciprocally moves in the oil cylinder barrel, so that the connection reliability of the piston on the piston rod is critical in the face of various factors such as oil pressure, impact and the like, and the failure of the piston can directly cause the damage of the inner wall of the oil cylinder barrel or the damage of the piston rod.

The piston applied to the oil cylinder at present is to process a sealing ring groove on the piston, process a thread on an inner hole of the piston, connect the piston on a piston rod through the thread, and prevent the piston thread from loosening through a steel ball or a riding screw. In addition, for thread locking, the existing steel ball locking occupies the axial size of a piston due to the fact that a steel ball groove needs to be reserved, space is wasted for an oil cylinder with a compact structure, and a seam-riding screw is used for locking.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides a split type piston anti loosening structure and hydro-cylinder, can improve the locking effect of piston and piston rod, reduces the piston size, guarantees piston structure's compactness.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a split type piston anti loosening structure, includes the piston rod, threaded connection has piston and lock nut in proper order on the piston rod, the terminal surface of piston and lock nut laminates mutually and forms mounting groove, have along the mounting hole of radially seting up in the mounting groove, be equipped with the steel ball in the mounting hole, the right-hand member cover of piston is equipped with the clamping ring, lock nut's left end cover is equipped with and keeps off the ring subassembly, the contact terminal surface of clamping ring and fender ring subassembly compresses tightly through piston and lock nut, the steel ball is located the inboard of clamping ring and fender ring subassembly.

In a preferred embodiment of the present invention, the right end face of the piston has a first inclined end face, the left end face of the lock nut has a second inclined face, and the end faces of the piston and the lock nut are attached to each other so that the first inclined end face and the second inclined face form a mounting groove.

In a preferred embodiment of the present invention, the second inclined surface presses the retainer ring assembly to press the retainer ring assembly against the first inclined end surface.

In a preferred embodiment of the present invention, the right end of the inner ring of the pressing ring has a first pressing end surface disposed obliquely, the first pressing end surface is pressed on the first inclined end surface, the left end of the inner ring of the pressing ring is sleeved on the outer ring of the piston, and the right end of the inner ring is located outside the steel ball.

In a preferred embodiment of the present invention, the right end of the inner ring of the baffle ring assembly has a second pressing end face which is obliquely arranged, the second pressing end face is attached to the second inclined face, and the left end of the inner ring of the baffle ring assembly is located outside the steel ball.

In a preferred embodiment of the present invention, the retaining ring assembly includes two semicircular retaining rings, the semicircular retaining rings are connected by screw fastening, and the pressing ring is pressed axially.

In a preferred embodiment of the present invention, the piston is further sleeved with a supporting ring block and a dirt-containing ring block, the dirt-containing ring block is attached to the left side of the pressing ring, the piston is provided with a supporting shoulder, and the supporting ring block and the dirt-containing ring block are pressed tightly on the supporting ring block through the pressing ring.

In a preferred embodiment of the present invention, the supporting shoulder is sleeved with a sealing ring assembly.

In a preferred embodiment of the present invention, the piston and the lock nut have opposite screw threads.

For solving the technical problem, the utility model discloses a another technical scheme is: the oil cylinder comprises a cylinder barrel, and the split type piston anti-loosening structure is arranged in the cylinder barrel.

The utility model has the advantages that: the utility model discloses split type piston anti loosening structure and hydro-cylinder through beat the mounting hole in the mounting groove that lock nut and piston cooperation formed, sets up the steel ball in the mounting hole, has reduced piston axial space for piston structure is compacter.

The utility model discloses split type piston anti loosening structure and hydro-cylinder are established to the cover and are pressed the clamping ring and keep off the ring subassembly on piston and lock nut, block the nut from the downthehole roll-off of mounting, have improved piston structure's stability.

The utility model discloses split type piston anti loosening structure and hydro-cylinder, piston and lock nut's screw thread revolve to the opposite phase to move the bearing capacity of variable load stronger, effectively prevent that the piston from breaking away from, can also increase the axial thrust that the subassembly provided is shifted to the shelves.

The utility model discloses split type piston anti loosening structure and hydro-cylinder, split type retaining ring subassembly receive the axial thrust on second inclined plane at the installation in-process of screwing up, provide axial thrust to the clamping ring through the retaining ring subassembly to compress tightly the backing ring piece and receive dirty ring block, prevent the backing ring piece and receive dirty ring block and drop from the piston, guarantee the stability of structure.

The utility model discloses split type piston anti loosening structure and hydro-cylinder set up the support on the piston and keep off the shoulder, and the thrust transmission of support ring piece keeps off the shoulder to the support on, prevents to establish and to receive pressure and be extruded at the sealing washer subassembly that keeps off the shoulder in the support.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic structural view of a preferred embodiment of the split-type piston anti-loosening structure of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a cross-sectional view of another perspective of the split piston check structure;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a cross-sectional view of the piston;

FIG. 6 is a cross-sectional view of the lock nut

FIG. 7 is a schematic structural view of a retainer ring assembly;

the parts in the drawings are numbered as follows: 1. piston rod, 2, piston, 21, first slope terminal surface, 22, support and keep off the shoulder, 3, lock nut, 31, second inclined plane, 32, mounting groove, 33, mounting hole, 4, steel ball, 5, clamp ring, 51, first compress tightly the terminal surface, 6, keep off the ring subassembly, 61, the second compresses tightly the terminal surface, 62, semi-circular fender ring, 63, screw, 7, support ring piece, 8, receive dirty ring piece, 9, sealing washer subassembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1 and 3, a split type piston anti-loose structure includes a piston rod 1, and a piston 2 and a lock nut 3 are sequentially connected to the piston rod 1 through threads. The thread directions of the piston 2 and the locking nut 3 are opposite, and the thread size on the piston 2 is larger than that of the nut 3. The reverse thread of the piston rod 1 is matched with the piston 2, and the positive thread is matched with the locking nut 3. Because the screw thread direction of piston 2 and lock nut 3 is different, so will produce partial pretightning force between the two, improve locking performance and subtract the extrusion of piston 2 to piston rod 1 shaft shoulder simultaneously. Or the piston is in positive thread fit with the piston rod, and the piston nut is in reverse thread fit with the piston rod.

Referring to fig. 2 and 5, the right end surface of the piston 2 has a first inclined end surface 21, the left end surface of the lock nut 3 has a second inclined surface 31, and the end surfaces of the piston 2 and the lock nut 3 are attached to each other so that the first inclined end surface 21 and the second inclined surface form a mounting groove 32. The end faces of the piston 2 and the locking nut 3 are attached to form a mounting groove 32, a mounting hole 33 formed in the radial direction is formed in the mounting groove 32, and a steel ball 4 is arranged in the mounting hole 33. The screw directions of the piston 2 and the nut are opposite, so the steel ball 4 can play a role in preventing the piston body and the nut from loosening.

The right-hand member cover of piston 2 is equipped with clamping ring 5, and lock nut 3's left end cover is equipped with and keeps off ring subassembly 6, and clamping ring 5 compresses tightly through piston 2 and lock nut 3 with the contact terminal surface that keeps off ring subassembly 6, and steel ball 4 is located clamping ring 5 and the inboard that keeps off ring subassembly 6. The clamping ring 5 and the baffle ring assembly 6 block the steel ball 4 from the outside and prevent the steel ball 4 from falling out of the mounting hole 33.

Referring to fig. 3, 6 and 7, the right end of the inner ring of the retainer ring assembly 6 has a second pressing end surface 61 disposed obliquely, the second pressing end surface 61 is attached to the second inclined surface 31, and the left end of the inner ring of the retainer ring assembly 6 is located outside the steel ball 4.

The retaining ring assembly 6 comprises two semicircular retaining rings 62, the semicircular retaining rings 62 are tightly connected through screws 63, and the compression ring 5 is compressed in the axial direction. The two semicircular baffle rings 62 are oppositely arranged on the locking nut 3, the screw 63 is screwed, and in the process of applying torque to the screw 63, the two semicircular baffle rings 62 are gradually tightened and slide down along the second inclined surface 31 through the second pressing end surface 61 of the semicircular baffle ring 62, so that axial force is generated to push the pressing ring 5. The second inclined surface 31 presses the baffle ring assembly 6 to enable the baffle ring assembly 6 to press the pressing ring 5 on the dirt containing ring block 8.

The right end of the inner ring of the pressing ring 5 is provided with a first pressing end face 51 which is obliquely arranged, the first pressing end face 51 is pressed on the first oblique end face 21, the left end of the inner ring of the pressing ring 5 is sleeved on the outer ring of the piston 2, and the right end of the inner ring is positioned on the outer side of the steel ball 4.

Piston 2 still overlaps and is equipped with support ring piece 7 and receives dirty ring piece 8, receives dirty ring piece 8 subsides and establishes the left side at clamp ring 5, has the support on the piston 2 and keeps off the shoulder 22, and support ring piece 7 compresses tightly on support ring piece 7 through clamp ring 5 with receiving dirty ring piece 8. The clamping ring 5 transmits the axial thrust to the left support ring block 7 and the dirt containing ring block 8 after receiving the axial thrust of the baffle ring assembly 6, so that the support ring block 7 and the dirt containing ring block 8 are pressed to prevent the loosening of the support ring block 7 and the dirt containing ring block 8.

The supporting shoulder 22 is sleeved with a sealing ring assembly 9. The sealing ring assembly 9 consists of a sealing ring for a hole and a check ring. Because the supporting block retaining shoulder is positioned on the end face of the supporting block, the supporting retaining shoulder 22 bears the axial thrust of the supporting ring block 7, the sealing ring assembly 9 cannot be extruded due to the influence of the axial thrust, and the supporting retaining shoulder 22 also ensures the anti-impact performance of the front end of the piston 2.

The utility model provides a split type piston anti loosening structure at first with the support ring piece 7, receive dirty ring piece 8 and other conventional accessories correspond pack into piston 2 on, screw up piston 2 on piston rod 1 to apply corresponding moment of torsion. Then, the sealing ring assembly 9 is correspondingly arranged on the supporting stop shoulder 22, and the pressing ring 5 is sleeved on the piston 2. Then the locking nut 3 is screwed into the piston rod 1, torque is applied, a mounting hole 33 is drilled at the joint of the piston 2 and the locking nut 3, and the steel ball 4 is placed in the mounting hole 33. And finally, the retaining ring assembly 6 is tightly screwed on the locking nut 3 through a screw, and the retaining ring assembly 6 compresses the pressing ring 5 to complete assembly.

The oil cylinder comprises a cylinder barrel, wherein the split type piston anti-loosening structure is arranged in the cylinder barrel.

Be different from prior art, the utility model discloses split type piston anti loosening structure and hydro-cylinder can improve the locking effect of piston and piston rod, reduce the piston size, guarantee piston structure's compactness.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art should understand that without departing from the spirit of the present invention, the person skilled in the art should not inventively design the similar structural modes and embodiments to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a split type piston anti loosening structure, includes the piston rod, threaded connection has piston and lock nut in proper order on the piston rod, a serial communication port, the terminal surface of piston and lock nut is laminated mutually and is formed mounting groove, have along the mounting hole of radially seting up in the mounting groove, be equipped with the steel ball in the mounting hole, the right-hand member cover of piston is equipped with the clamping ring, lock nut's left end cover is equipped with and keeps off the ring subassembly, the clamping ring compresses tightly through piston and lock nut with the contact terminal surface that keeps off the ring subassembly, the steel ball is located the clamping ring and keeps off the inboard of ring subassembly.

2. The split type piston anti-loosening structure according to claim 1, wherein a first inclined end surface is arranged on the right end surface of the piston, a second inclined surface is arranged on the left end surface of the lock nut, and the end surfaces of the piston and the lock nut are attached to each other so that the first inclined end surface and the second inclined surface form a mounting groove.

3. The split piston looseness prevention structure of claim 2, wherein the second inclined surface presses the retainer ring assembly to cause the retainer ring assembly to press the pressing ring against the first inclined end surface.

4. The split type piston anti-loosening structure according to claim 3, wherein a first pressing end face which is obliquely arranged is arranged at the right end of the inner ring of the pressing ring, the first pressing end face is pressed on the first inclined end face, the left end of the inner ring of the pressing ring is sleeved on the outer ring of the piston, and the right end of the inner ring is positioned on the outer side of the steel ball.

5. The split type piston anti-loosening structure according to claim 3, wherein a second pressing end face arranged obliquely is arranged at the right end of the inner ring of the retainer ring assembly, the second pressing end face is attached to the second inclined face, and the left end of the inner ring of the retainer ring assembly is located on the outer side of the steel ball.

6. The split type piston anti-loose structure is characterized in that the baffle ring assembly comprises two semicircular baffle rings, the semicircular baffle rings are connected through screws in a fastening mode, and the compression rings are compressed axially.

7. The split type piston anti-loosening structure according to any one of claims 1 to 6, wherein the piston is further sleeved with a support ring block and a dirt receiving ring block, the dirt receiving ring block is attached to the left side of the pressing ring, the piston is provided with a support stop shoulder, and the support ring block and the dirt receiving ring block are pressed on the support ring block through the pressing ring.

8. The split piston anti-loosening structure according to claim 7, wherein a seal ring assembly is sleeved on the supporting retaining shoulder.

9. The split piston looseness prevention structure of claim 8, wherein the thread directions of the piston and the locknut are opposite.

10. An oil cylinder, which comprises a cylinder barrel and is characterized in that a split type piston anti-loosening structure as claimed in any one of claims 1 to 9 is arranged in the cylinder barrel.