Hydraulic cylinder piston locking device
By using a combined structure of open locking, open cone sleeve and screw at the connection between the hydraulic cylinder piston and the piston rod, the problem of easy loosening of the traditional fastening method is solved, and the stable connection of the hydraulic cylinder piston is achieved, avoiding the failure of the hydraulic cylinder operation.
Patent Information
- Application Number
- CN202421638620.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The tightening method of the traditional hydraulic cylinder piston is easily loosened due to impact during the use of the hydraulic cylinder, causing the piston to break away from the piston rod and the hydraulic cylinder to fail to operate.
The combination structure of piston rod, piston, open lock female, open cone sleeve and screw is adopted. The conical surfaces of the open lock female and open cone sleeve are matched to the tightening of the screw to ensure a stable connection between the piston and the piston rod.
Effectively prevent the hydraulic cylinder piston from loosening and avoid the hydraulic cylinder operation failure caused by the piston falling off the piston rod.
Smart Images
Figure CN222835999U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hydraulic cylinder piston anti-loosening device, belonging to the technical field of hydraulic equipment in the metallurgical industry. Background Art
[0002] In industrial factories, the movement of various equipment mechanisms is inseparable from hydraulic equipment, among which the hydraulic cylinder is an important executive part, and its stable operation is the prerequisite for ensuring the efficient operation of the equipment. Taking into account the processing cost, the piston and piston rod of hydraulic cylinders with a cylinder diameter of more than 100mm are generally processed separately, and then assembled after processing. The fastening of the piston and the piston rod is particularly important. The traditional fastening method is to install a fastening lock nut at the end of the piston rod to fix the piston. This form is relatively simple. During the use of the hydraulic cylinder, the piston reciprocates. When an impact occurs, the lock nut is very likely to loosen. After a long time, the lock nut will be disengaged, which will eventually cause the piston to detach from the piston rod and the hydraulic cylinder to fail. Utility Model Content
[0003] The utility model aims to provide a hydraulic cylinder piston anti-loosening device, which can effectively prevent the hydraulic cylinder piston from loosening, avoid the hydraulic cylinder action failure caused by the piston falling off the piston rod, and solve the problems existing in the background technology.
[0004] The technical solution of the utility model is:
[0005] A hydraulic cylinder piston anti-loosening device comprises a piston rod, a piston, an open lock nut, an open taper sleeve and screws. The piston is provided with a mounting hole matching the piston rod and the open taper sleeve. One end of the piston rod is axially inserted into the piston mounting hole, and the piston rod and the piston are fastened together by the open lock nut. The open taper sleeve is sleeved on the open lock nut, and the piston and the open taper sleeve are fastened together by screws.
[0006] The outer surface of the open lock nut and the inner surface of the open cone sleeve are conical surfaces that match each other.
[0007] The end surfaces of the open cone sleeve and the piston are respectively provided with half screw holes matched with the screws.
[0008] The half screw holes on the open cone sleeve and the piston end surface that match the screws are both two evenly arranged in the circumferential direction.
[0009] The end of the piston rod is provided with an external thread matched with the open lock nut.
[0010] The beneficial effects of the utility model are: it can effectively prevent the hydraulic cylinder piston from loosening, and avoid the hydraulic cylinder action failure caused by the piston falling off the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a cross-sectional view of the utility model;
[0012] Figure 2 It is a side view of the utility model;
[0013] In the figure: 1. piston rod; 2. piston; 3. open lock nut; 4. open taper sleeve; 5. screw. DETAILED DESCRIPTION
[0014] The present invention will be further described below by way of examples with reference to the accompanying drawings.
[0015] Refer to the attached Figure 1-2 A hydraulic cylinder piston anti-loosening device comprises a piston rod 1, a piston 2, an open lock nut 3, an open taper sleeve 4 and a screw 5. The piston 2 is provided with a mounting hole matching the piston rod 1 and the open taper sleeve 4. One end of the piston rod 1 is axially inserted into the mounting hole of the piston 2, and the piston rod 1 and the piston 2 are fastened together by the open lock nut 3. The open taper sleeve 4 is sleeved on the open lock nut 3, and the piston 2 and the open taper sleeve 4 are fastened together by the screw 5.
[0016] In this embodiment, refer to the attached Figure 1-2 The hydraulic cylinder piston anti-loosening device comprises a piston rod 1, a piston 2, an open lock nut 3, an open cone sleeve 4 and a screw 5, wherein:
[0017] The end of the piston rod 1 is provided with an external thread that matches the open lock nut 3. The outer surface of the open lock nut 3 and the inner surface of the open cone sleeve 4 are mutually matching conical surfaces. Two half screw holes that match the screw 5 are respectively provided on the end surfaces of the open cone sleeve 4 and the piston 3.
[0018] During installation, first insert one end of the piston rod 1 axially into the mounting hole of the piston 2, then screw the open lock nut 3 into the external thread at the end of the piston rod 1 to fasten the piston rod 1 and the piston 2 together, then push the open tapered sleeve 4 axially into the inner hole of the piston 2 to align the open tapered sleeve 4 with the half screw holes on the end face of the piston 2, finally screw two screws 5 into the threaded hole formed by the two half screw holes, tighten the open tapered sleeve 4 by means of the screws 5, so that the conical surface of the inner hole of the open tapered sleeve 4 is in close contact with the conical surface of the outer contour of the open lock nut 3, and tighten the open lock nut 3 by means of the action of the conical surface to prevent the open lock nut 3 from loosening.
[0019] The utility model can effectively prevent the hydraulic cylinder piston from loosening and avoid the hydraulic cylinder action failure caused by the piston falling off the piston rod.
Claims
1. A hydraulic cylinder piston anti-loosening device, characterized in that: The invention comprises a piston rod (1), a piston (2), an open lock nut (3), an open taper sleeve (4) and a screw (5). The piston (2) is provided with a mounting hole matched with the piston rod (1) and the open taper sleeve (4). One end of the piston rod (1) is inserted into the mounting hole of the piston (2) along the axial direction, and the piston rod (1) and the piston (2) are fastened together by the open lock nut (3). The open taper sleeve (4) is sleeved on the open lock nut (3), and the piston (2) and the open taper sleeve (4) are fastened together by the screw (5).
2. A hydraulic cylinder piston anti-loosening device according to claim 1, characterized in that: The outer surface of the open lock nut (3) and the inner surface of the open cone sleeve (4) are conical surfaces that fit together.
3. The hydraulic cylinder piston anti-loosening device according to claim 1, characterized in that: The end surfaces of the open cone sleeve (4) and the piston (2) are respectively provided with half screw holes that match the screws (5).
4. A hydraulic cylinder piston anti-loosening device according to claim 3, characterized in that: The half screw holes on the end surfaces of the open cone sleeve (4) and the piston (2) that match the screws (5) are both two holes evenly arranged in the circumferential direction.
5. The hydraulic cylinder piston anti-loosening device according to claim 1, characterized in that: The end of the piston rod (1) is provided with an external thread that matches the open lock nut (3).