CN207261360U

CN207261360U - A kind of supporting leg self-locking hydraulic cylinder

Info

Publication number: CN207261360U
Application number: CN201721069665.3U
Authority: CN
Inventors: 边海岸; 孙连佳; 马可白; 王铁成
Original assignee: Liaoning Lufa Machinery Equipment Manufacturing Co Ltd
Current assignee: Liaoning Lufa Machinery Equipment Manufacturing Co Ltd
Priority date: 2017-08-25
Filing date: 2017-08-25
Publication date: 2018-04-20
Anticipated expiration: 2027-08-25

Abstract

The utility model discloses a kind of supporting leg self-locking hydraulic cylinder, with cylinder barrel, piston is housed in cylinder barrel, the upper/lower terminal of piston is connected with upper and lower supporting leg respectively, further include the tail pipe being connected with cylinder barrel upper end, tail pipe has a upper cover, and the locking screw coaxial with tail pipe is housed by bearing on upper lid, locking nut is rotary with locking screw, one end of locking screw is equipped with handwheel；The deep hole for accommodating the leading screw section in tail pipe is machined with upper supporting leg, the leading screw section in tail pipe extend into the deep hole of upper supporting leg and annulus is left between the inner wall of deep hole；The outer wall of the locking nut is equipped with guide ledges, and correspondingly the inner wall of tail pipe is equipped with the guiding groove along tail pipe axial direction, and the guide ledges on locking nut outer wall are located in the guiding groove in inner wall of liner.When supporting leg stretching instantly needs locking in the utility model, locking nut can be made to be resisted against the top of upper supporting leg, lower supporting leg can be locked in job state securely by rotating the locking screw.

Description

A kind of supporting leg self-locking hydraulic cylinder

Technical field

A kind of hydraulic cylinder is the utility model is related to, concretely relates to a kind of supporting leg self-locking hydraulic cylinder.

Background technology

Hydraulic cylinder of the prior art, its structure have generally comprised cylinder barrel, and piston is housed in cylinder barrel, and upper and lower the two of piston End is connected with upper and lower supporting leg respectively, and cylinder barrel side has the hydraulic cylinder oil pipe being connected with close to the cylinder barrel wall of cylinder barrel upper/lower terminal. Due to letting out phenomenon in usually having at hydraulic cylinder internal piston, hydraulic oil can be from the cylinder barrel internal leakage of piston side to piston opposite side Cylinder barrel in, cause the slightly retraction of hydraulic cylinder supporting leg, supporting leg cannot rigid self-locking for a long time, cause shadow to lifting equipment work Ring, particularly towering equipment is even more that there are larger danger.

Utility model content

The technical problem to be solved by the present invention is to provide it is a kind of there is at piston even if hydraulic oil leakage, also can will Supporting leg is firmly locked in the supporting leg self-locking hydraulic cylinder of job state.

In order to solve the above technical problems, a kind of supporting leg self-locking hydraulic cylinder of the utility model, the hydraulic cylinder have cylinder barrel, cylinder Piston is housed, the upper/lower terminal of piston is connected with upper and lower supporting leg, has on the outside of cylinder barrel and close cylinder barrel upper/lower terminal respectively in cylinder The hydraulic cylinder oil pipe that is connected of cylinder barrel wall, further include and be connected with cylinder barrel upper end and the tail pipe coaxial with cylinder barrel, tail pipe have Upper cover, is equipped with the locking screw coaxial with tail pipe by bearing on upper lid, locking nut, locking screw position is rotary with locking screw One end outside tail pipe is equipped with handwheel；The deep hole for accommodating the leading screw section in tail pipe is machined with the upper supporting leg, Leading screw section in tail pipe extend into the deep hole of upper supporting leg and annulus is left between the inner wall of deep hole；The locking The outer wall of nut is equipped with guide ledges, and correspondingly the inner wall of tail pipe is equipped with the guiding groove along tail pipe axial direction, locking nut Guide ledges on outer wall are located in the guiding groove in inner wall of liner.

As the improvement of the utility model, the bottom of the lower supporting leg has installation bulb, installs and is hinged with leg on bulb Leg.

Supporting leg self-locking hydraulic cylinder using the above structure, can be by described in rotation when supporting leg stretching instantly needs locking Locking screw, locking nut is resisted against the top of upper supporting leg, at this time, even if hydraulic oil leaks at piston, locking The phenomenon slightly retracted will not occur in the lower supporting leg under the action of tight nut, thoroughly solve the self-locking of hydraulic cylinder supporting leg Problem, meanwhile, the utility model has the advantages of simple structure, reliable, and it is relatively low to manufacture cost.

Brief description of the drawings

The utility model is described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a kind of main cross section structure diagram of supporting leg self-locking hydraulic cylinder of the utility model.

Fig. 2 is the top view of the upper supporting leg in supporting leg self-locking hydraulic cylinder shown in Fig. 1.

Fig. 3 is the section enlarged diagram of the line A-A along Fig. 1.

Fig. 4 is the profile that the tail pipe after locking nut and locking screw is removed in Fig. 3.

Fig. 5 is the profile that the locking nut after tail pipe and locking screw is removed in Fig. 3.

Fig. 6 is a kind of main cross section structure diagram of supporting leg self-locking hydraulic cylinder of the utility model, and lower branch is shown in figure Leg stretches out state during locking.

Embodiment

Referring to Fig. 1-6, a kind of supporting leg self-locking hydraulic cylinder of the utility model, the hydraulic cylinder has a cylinder barrel 10, in cylinder barrel 10 Equipped with piston 20, the upper/lower terminal of piston 20 is connected with upper and lower supporting leg 30,40 respectively, and the outside of cylinder barrel 10 has and close cylinder barrel 10 The hydraulic cylinder oil pipe 50 that the cylinder barrel wall of upper/lower terminal is connected, has further included and has been connected with 10 upper end of cylinder barrel and coaxial with cylinder barrel 10 Tail pipe 60, tail pipe 60 has a upper cover 61, the locking screw 63 coaxial with tail pipe 60 is housed by bearing 62 in upper cover 61, lock Locking nut 64 is rotary with leading screw 63, one end that locking screw 63 is located at outside tail pipe 60 is equipped with handwheel 65；The upper supporting leg 30 The deep hole 31 for accommodating the leading screw section in tail pipe 60 is inside machined with, the leading screw section in tail pipe 60 extend into upper supporting leg Annulus 32 is left in 30 deep hole 31 and between the inner wall of deep hole 31；The outer wall of the locking nut 64, which is equipped with, to be oriented to Boss 66, correspondingly tail pipe（60）Inner wall be equipped with guiding groove 67 along tail pipe axial direction, leading on 64 outer wall of locking nut It is located to boss 66 in the guiding groove 67 on 60 inner wall of tail pipe.The bottom of the lower supporting leg 40 has installation bulb 41, installation Leg leg 42 is hinged with bulb 41.

Claims

1. a kind of supporting leg self-locking hydraulic cylinder, which has cylinder barrel（10）, cylinder barrel（10）It is interior that piston is housed（20）, piston （20）Upper/lower terminal be connected with upper and lower supporting leg respectively（30、40）, cylinder barrel（10）Outside has and close cylinder barrel（10）Upper and lower two The hydraulic cylinder oil pipe that the cylinder barrel wall at end is connected（50）, it is characterised in that：Further include and cylinder barrel（10）Upper end is connected and and cylinder Cylinder（10）Coaxial tail pipe（60）, tail pipe（60）With upper cover（61）, upper cover（61）On pass through bearing（62）It is equipped with and tail pipe （60）Coaxial locking screw（63）, locking screw（63）On be rotary with locking nut（64）, locking screw（63）Positioned at tail pipe （60）Exterior one end is equipped with handwheel（65）；The upper supporting leg（30）Inside it is machined with and is located at tail pipe for accommodating（60）Interior leading screw The deep hole of section（31）, positioned at tail pipe（60）Interior leading screw section extend into upper supporting leg（30）Deep hole（31）Interior and and deep hole（31）'s Annulus is left between inner wall（32）；The locking nut（64）Outer wall be equipped with guide ledges（66）, correspondingly tail pipe （60）Inner wall be equipped with along tail pipe axial direction guiding groove（67）, locking nut（64）Guide ledges on outer wall（66）It is located at Tail pipe（60）Guiding groove on inner wall（67）It is interior.

2. supporting leg self-locking hydraulic cylinder as claimed in claim 1, it is characterised in that：The lower supporting leg（40）Bottom have peace Fill bulb（41）, bulb is installed（41）On be hinged with leg leg（42）.