CN212584052U

CN212584052U - Piston locking nut of hydraulic oil cylinder

Info

Publication number: CN212584052U
Application number: CN202021335189.7U
Authority: CN
Inventors: 曹轩
Original assignee: Changzhou Wenxu Machinery Co ltd
Current assignee: Changzhou Wenxu Machinery Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-02-23
Anticipated expiration: 2030-07-08

Abstract

The utility model relates to the technical field of machinery, in particular to a hydraulic cylinder piston lock nut, which comprises a nut body and a nut head, wherein the nut body and the nut head are integrally formed, both ends of the nut body are communicated with threaded through holes, a first nylon ring is arranged between the nut body and the nut head, and the nut body is abutted against a part through the first nylon ring; wherein, the outline of the nut head is smaller than the outline of the nut body; the first nylon ring is arranged to effectively relieve the mutual impact and vibration between the connecting part and the locking nut, the second nylon ring is arranged in the threaded through hole, and when the bolt is screwed in, the nylon ring is extruded and forms large and stable frictional resistance with the bolt, so that the nut is further locked; the bolt head sets up to frustum body structure, has certain guide effect and conical structure of drawing in can the internal impact force to the locking nut of dispersion hydraulic cylinder to the installation of screwing of nut.

Description

Piston locking nut of hydraulic oil cylinder

Technical Field

The utility model relates to the technical field of machinery, especially, relate to a hydraulic cylinder piston lock nut.

Background

The threaded connection has the advantages of high precision, convenience in assembly, convenience in part disassembly and assembly and the like, so that the threaded connection is very widely applied to connection between the current mechanism and equipment. In the hydraulic oil cylinder equipment, a piston does reciprocating motion in a relatively sealed cavity, and in the actual use process, a piston rod bears alternating stress of tensile force or pressure for a long time to enable a locking nut arranged at the end part of the piston to loosen and retreat. Meanwhile, the nut is influenced by impact force or vibration or environmental factors such as temperature sudden change and the like, so that the pretightening force is reduced, the tight connection of the nut in a locking state is changed into loose connection without pretightening force or with insufficient pretightening force, and the connection quality between threads is reduced. In a real environment, if the locking nut arranged at the end part of the piston is not pressed in place or the inertia force is too large, the hydraulic machine cannot work normally or serious accidents are caused when the locking nut is loosened and withdrawn.

In view of the above problems, the designer is based on the practical experience and professional knowledge that the engineering of the products is applied for many years, and is matched with the application of the theory to actively carry out research and innovation, so as to create a hydraulic cylinder piston lock nut, and the hydraulic cylinder piston lock nut is more practical.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a hydraulic cylinder piston lock nut is provided.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a hydraulic cylinder piston locking nut comprises a nut body and a nut head, wherein the nut body and the nut head are integrally formed, and two ends of the nut body are provided with threaded through holes in a penetrating manner;

a first nylon ring is arranged between the nut body and the nut head, and the nut body is abutted with a part through the first nylon ring;

wherein the profile of the nut head is smaller than the profile of the nut body.

Further, a first annular groove is formed in the joint of the nut head and the nut body, and the first nylon ring is arranged in the first annular groove.

Further, a second annular groove is formed in one end, far away from the nut head, of the nut body, and the second annular groove is horizontally formed in the inner wall of the threaded through hole along the circumferential direction.

Further, a second nylon ring is arranged in the second annular groove, and the inner diameter of the second nylon ring is slightly smaller than the diameter of the internal thread of the threaded through hole.

Further, the nut head is arranged to be of a frustum structure, and the diameter of the surface of one end, far away from the nut body, of the nut head is smaller than that of the other end of the nut head.

Furthermore, a chamfer is arranged at the edge of the connecting end of the nut head and the first annular groove.

Further, an inclined plane is arranged on the internal thread of the threaded through hole, the tooth tip of the internal thread is attached to the inclined plane, and the inclined angle of the inclined plane is 45 degrees.

Further, the nut body is a regular hexagonal prism outline.

The utility model has the advantages that: the nylon material has good resilience, and has good absorption and damping action to external impact and vibration, consequently first nylon circle can effectively alleviate mutual impact and vibration between connecting part and the lock nut, be provided with the second nylon circle in the screw through-hole, when twisting the bolt, the nylon circle is extruded and forms big and stable frictional resistance with between the bolt, the bolt head sets up to frustum body structure, the installation of screwing to the nut has certain guide effect and conical structure of drawing in can disperse the direct impact force of lock nut in the pneumatic cylinder body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a cross-sectional view of a lock nut in an embodiment of the present invention;

fig. 2 is a schematic structural view of a lock nut in an embodiment of the present invention;

fig. 3 is a front view of a lock nut according to an embodiment of the present invention;

FIG. 4 is a sectional view taken along line A in FIG. 3;

fig. 5 is a schematic structural diagram of a thread in an embodiment of the present invention.

Reference numerals: 1. a nut body; 11. a second annular groove; 12. a second nylon loop; 2. a nut head; 21. a first annular groove; 22. a first nylon loop; 3. a threaded through hole; 31. a bevel; 4. a bolt; 5. and connecting parts.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In hydraulic cylinder equipment, a piston does reciprocating motion in a relatively sealed cavity, a piston rod bears tension or alternating stress of pressure for a long time, and if a locking nut arranged at the end part of the piston is not pressed in place or the inertia force is too large, the situation that the piston is loosened and withdrawn is caused, so that the application provides the hydraulic cylinder piston locking nut. In this embodiment, the lock nut includes nut body 1 and nut head 2, and nut body 1 and nut head 2 integrated into one piece, and its both ends link up and have seted up threaded through-hole 3, fasten on bolt 4 through threaded through-hole 3, along axial projection, the profile of nut head 2 is less than the profile of nut body 1. In the specific implementation process, a first annular groove 21 is formed in the joint of the nut head 2 and the nut body 1, a first nylon ring 22 is arranged in the first annular groove 21, and the nut body 1 is abutted to the connecting part 5 through the first nylon ring 22. The nylon material has good resilience, and has good absorption and damping effects on external impact and vibration, so that the mutual impact and vibration between the connecting part and the locking nut can be effectively relieved by the first nylon ring, the possibility of nut looseness caused by vibration impact and variable load of the nut is reduced, and a good sealing effect is achieved.

As a preferred embodiment of this application, be provided with second annular groove 11 in nut body 1 keep away from nut head 2 one end, and second annular groove 11 sets up on the inner wall of screw through-hole 3 along circumference level, is provided with second nylon circle 12 in second annular groove 11, and the internal diameter of second nylon circle 12 slightly is less than the internal thread diameter of screw through-hole 3. The inner wall of the threaded through hole is embedded with the nylon ring, when the bolt is screwed in, the nylon ring is extruded into internal threads, and because the nylon material has good elasticity and toughness, large and stable frictional resistance is formed between the threads, and meanwhile, the nylon ring has good absorption and damping effects on vibration between the threads, and the nylon material has good resilience and can be matched with a locking nut to be disassembled and assembled for use for many times; in this embodiment, a certain sealing function is also performed.

As a preferred embodiment of the present application, the nut head 2 is configured as a frustum structure, and the diameter of the surface of one end of the nut head 2 far away from the nut body 1 is smaller than the diameter of the other end of the nut head 2; the edge of the connecting end of the nut head 2 and the first annular groove 21 is provided with a chamfer. The setting of chamfer can prevent can not damaged by sharp-pointed tip edge scraping when the cover of nylon circle is hung, and the bolt head sets up to frustum body structure, not only has certain guide effect and conical structure of drawing in to the installation of screwing of nut and can disperse in the pneumatic cylinder body to the direct impact force of locking nut forward.

As a preferred embodiment of the present application, the internal thread of the threaded through hole 3 is provided with a slope 31, and the tip of the internal thread sticks to the slope 31, wherein the inclination angle of the slope 31 is set to 45 °. When the internal thread and the external thread are tightly matched, the tooth tips of the external thread only abut against the wedge-shaped inclined plane of the internal thread. The normal force of the contact point is changed, and meanwhile, the threads distributed along the axial direction are stressed more uniformly, so that the bearing capacity of the internal thread is greatly improved. In this embodiment, the nut body 1 is a regular hexagonal body, which is convenient for a user to screw or unscrew.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The hydraulic cylinder piston locking nut is characterized by comprising a nut body (1) and a nut head (2), wherein the nut body (1) and the nut head (2) are integrally formed, two ends of the nut body are provided with threaded through holes (3) in a penetrating mode, the nut body is fastened on a bolt (4) through the threaded through holes (3), a first nylon ring (22) is arranged between the nut body (1) and the nut head (2), and the nut body (1) is abutted against a connecting part (5) through the first nylon ring (22); wherein the profile of the nut head (2) is smaller than the profile of the nut body (1).

2. A hydraulic cylinder piston lock nut according to claim 1, characterized in that the joint of the nut head (2) and the nut body (1) is provided with a first annular groove (21), and the first nylon ring (22) is arranged in the first annular groove (21).

3. A hydraulic cylinder piston lock nut according to claim 2, characterized in that a second annular groove (11) is provided at the end of the nut body (1) remote from the nut head (2), and the second annular groove (11) is horizontally provided on the inner wall of the threaded through hole (3) along the circumferential direction.

4. A hydraulic cylinder piston lock nut according to claim 3, characterised in that a second nylon ring (12) is provided in the second annular groove (11), the inner diameter of the second nylon ring (12) being slightly smaller than the diameter of the internal thread of the threaded through hole (3).

5. A hydraulic cylinder piston lock nut according to claim 2, characterized in that the nut head (2) is arranged in a frustum structure, and the diameter of the surface of the nut head (2) at the end far away from the nut body (1) is smaller than the diameter of the other end of the nut head (2).

6. A hydraulic cylinder piston lock nut according to claim 5, characterized in that the edge of the end of the nut head (2) that connects to the first annular groove (21) is chamfered.

7. A hydraulic cylinder piston lock nut according to claim 1, characterized in that the internal thread of the threaded through hole (3) is provided with a bevel (31), the tip of the internal thread being attached to the bevel (31), wherein the angle of inclination of the bevel (31) is set to 45 °.

8. A hydraulic cylinder piston lock nut according to claim 1, characterised in that the nut body (1) is a regular hexagonal prism profile.