CN206690008U - A kind of shaft end impacts screw protective screw device - Google Patents

Abstract

The utility model discloses a kind of shaft end to impact screw protective screw device, including the check nut and impact set being rotatably connected in successively on the screw thread of shaft end, the impact set is hexagonal prismoid shape, the bottom of impact set is provided with a blind hole, the internal thread that can be spun with shaft end screw thread is provided with the blind hole in close orifice position, an inner groovy is additionally provided with the blind hole, the inner groovy is connected between internal thread and blind hole inner side end, the utility model is to be preferably connected to shaft end, impact set inner face is in close contact with axial end, impact force can be fully transmitted in axial end, avoid screw thread stress on axle and cause a tooth damage, it is provided with check nut simultaneously, it can prevent impact set from being loosened with axle, it is stable with axis connection further to improve impact set.

Description

A kind of shaft end impacts screw protective screw device

Technical field

It the utility model is related to petroleum works technical field of construction, and in particular to a kind of shaft end impacts screw protective screw device.

Background technology

Plant equipment used in all kinds of industries based on oil, mine, wherein based on Axle Parts, it takes out or more The mode changed is the mode such as to push away, push up, pounding, and power is larger used in the process of taking-up, easily makes the end face of Axle Parts impaired or deformation, It can not be continuing with after particularly Axle Parts of the one end using screw thread as connected mode, end face and screw thread are impaired, ultimately result in report It is useless.

In oil exploitation, oil is produced using oil pumper as power-equipment, is a kind of universal mechanical oil production model.It is bent Handle pin is the main motion parts of oil pumper, there is certain taper.Crank-pin one end is fixed with connecting rod, and the other end passes through crank Fixed behind stroke hole with nut, cause to wear to avoid stroke hole from directly contacting with crank-pin, it is reliable in order to connect, in crank-pin There is the tapered bushing in one layer of inside outside.(namely crank-pin is rushed from one when oil pumper needs to change working system Cheng Kongzhong takes out and penetrates another stroke hole), when crank-pin takes out, bushing is pounded out with iron hammer.Due to crank-pin and lining The close connection of set, crank-pin is more difficult in bushing to pound out the percussion energetically, it is necessary to repeated multiple times, the crank-pin end face in percussion Gradually deformation and screw thread damage, ultimately result in crank-pin and scrap, can not use.

Crank Pin on Pumping Units during taking-up, scene use 12 pounds of iron hammers, in a manner of tapping energetically, by crank-pin from Stroke takes out in hole, during percussion, easily causes the damage of crank-pin screw thread and face deformation, ultimately results in crank-pin and scrap. Through investigation, impaired crank-pin in operation accounts for more than 90%.

Utility model content

(1) technical problems to be solved

In order to overcome prior art insufficient, it is proposed that a kind of shaft end impacts screw protective screw device, can to strike in gravity Hitting down still can preferably protect shaft end screw thread.

(2) technical scheme

The utility model is achieved through the following technical solutions：The utility model proposes a kind of shaft end impact screw protective screw dress Put, including the check nut and impact set being rotatably connected in successively on the screw thread of shaft end, the impact set is hexagonal prismoid shape, impact set Bottom be provided with a blind hole, the interior spiral shell that can be spun with shaft end screw thread is being provided with close to orifice position in the blind hole Line, an inner groovy is additionally provided with the blind hole, the inner groovy is connected between internal thread and blind hole inner side end.

Further, the inner groovy diameter is more than internal thread nominal diameter.

(3) beneficial effect

The utility model has the advantages that relative to prior art：

A kind of shaft end impact screw protective screw device that the utility model is mentioned, it can preferably be connected to shaft end, impact Cover inner face to be in close contact with axial end, impact force can be fully transmitted in axial end, avoid screw thread stress on axle and lead The damage of silk tooth is caused, while is provided with check nut, can prevent impact set from being loosened with axle, further improves impact set and axis connection Stability.

Brief description of the drawings

Fig. 1 is half section structure diagram when the utility model uses.

Fig. 2 is impact set half-section diagram.

1- check nuts；2- impact sets；21- blind holes；211- internal threads；212- inner groovies.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining The utility model, it is not used to limit the utility model.

As depicted in figs. 1 and 2 a kind of shaft end impact screw protective screw device, including be rotatably connected in successively on the screw thread of shaft end and Tight nut 1 and impact cover 2, and the impact set 2 is hexagonal prismoid shape, convenient use pliers or spanner turn impact set 2, is impacted The bottom of set 2 is provided with a blind hole 21, is provided with and can be revolved with shaft end screw thread close to orifice position in the blind hole 21 The internal thread 211 connect, is additionally provided with an inner groovy 212 in the blind hole 21, the inner groovy 212 be connected in internal thread 211 with Between the inner side end of blind hole 21.

Wherein, the diameter of inner groovy 212 is more than the nominal diameter of internal thread 211.

A kind of shaft end that the utility model is mentioned impact screw protective screw device, its when specifically used, first will and tight spiral shell Cap 1 is threaded on the screw thread of shaft end, then will impact set 2 also screw thread is screwed onto on shaft end, impact set 2 is by blind hole 21 Screw thread 211 and axis connection, because blind hole 21 is internally provided with inner groovy 212, thus axial end can be threaded to and blind hole 21 always Inner side end is in close contact, until impact set 2 is torqued-up to axle when can not moving, reverse turn check nut 1 so that and it is tight Nut 1 contacts with impact 2 bottom end faces of set, can prevent impact set 2 from being loosened in shots, it is ensured that impact set 2 inner side ends are contacted with axial end all the time, and during impact, sledgehammer is tapped on 2 top end faces of impact set, and impact set 2 will can be hit Beat in percussion power totally tansitive to axial end, shaft end screw thread stress can be avoided.

Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality New spirit and scope are defined.On the premise of the utility model design conception is not departed from, ordinary people in the field couple The all variations and modifications that the technical solution of the utility model is made, the scope of protection of the utility model, this reality all should be dropped into With new claimed technology contents, all record in detail in the claims.

Claims (2)

1. a kind of shaft end impacts screw protective screw device, it is characterised in that：Including the check nut being rotatably connected in successively on the screw thread of shaft end (1) and impact covers (2), and the impact set (2) is hexagonal prismoid shape, and the bottom of impact set (2) is provided with a blind hole (21), institute State in blind hole (21) and the internal thread (211) that can be spun with shaft end screw thread, the blind hole are being provided with close to orifice position (21) inner groovy (212) is additionally provided with, the inner groovy (212) is connected in internal thread (211) and blind hole (21) medial extremity Between face.

A kind of 2. shaft end impact screw protective screw device according to claim 1, it is characterised in that：The inner groovy (212) Diameter is more than internal thread (211) nominal diameter.