CN206943151U

CN206943151U - A kind of expansion link cam rotary positioning structure

Info

Publication number: CN206943151U
Application number: CN201720747520.8U
Authority: CN
Inventors: 李向明
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-06-23
Filing date: 2017-06-23
Publication date: 2018-01-30
Anticipated expiration: 2027-06-23

Abstract

The utility model discloses a kind of expansion link cam rotary positioning structure, including rotating cylinder and swelling part, rotating cylinder includes connection end, rotating cylinder is located at connection end upper end and is provided with cam, cam outer wall is provided with boss, swelling part is provided with endoporus, the side wall of endoporus has opening, endoporus is provided with the change section that radius tapers into, swelling part is actively socketed on cam outer wall by endoporus, boss can rotate so that swelling part distending or inside contracting along change section, the utility model outwards holds out against outer tube using the inwall of cam from swelling part, its pressure is more stable, so that expansion link it is flexible be located by connecting it is reliable, and its is simple in construction, it is easy to operate, the inner tube of gently rotating extensible arm is only needed to can be achieved in expansion link, positioning between outer tube.

Description

A kind of expansion link cam rotary positioning structure

Technical field

It the utility model is related to expansion link field of locating technology, more particularly to a kind of expansion link cam rotary positioning structure.

Background technology

At present, most expansion link is typically all and is made up of more piece pipe, in order to realize the fixation between the 2-section pipe of expansion link Connection, location structure is typically provided between 2-section pipe, is then fixedly connected by location structure.But existing skill Location structure its structure in art is commonly designed more complicated so that its operation is comparatively laborious, and its reliability of positioning is poor.

Utility model content

For overcome the deficiencies in the prior art, the utility model provides a kind of expansion link cam rotary positioning structure.

Technical scheme is mainly used by the utility model：A kind of expansion link cam rotary positioning structure, including rotation Cylinder and swelling part, the rotating cylinder include being used for the connection end being connected with expansion link inner tube, and rotating cylinder is located at connection end Upper end is provided with cam, and the cam outer wall is provided with boss, and the swelling part is provided with endoporus, and the side wall of the endoporus has Opening, endoporus are provided with the change section that radius tapers into, and swelling part is actively socketed on cam outer wall by endoporus, described convex Platform can be rotated so that swelling part distending or inside contracting along change section.

As the improvement of above-mentioned technical proposal, the boss is provided with multiple, and multiple boss are distributed in cam outer wall On.

As the further improvement of above-mentioned technical proposal, the swelling part include with boss quantity identical body, it is more Individual body, which encloses, to be located on cam outer wall, and the boss that each body corresponds to cam respectively is provided with one section of change section.

Further, the cam upper and lower ends stretch out respectively is provided with upper and lower limit bit platform, and the swelling part is set Between two limiting platforms.

Further, the upper end of the upper limit bit platform is provided with the introduction part of taper.

Further, it is arranged to hollow structure inside the rotating cylinder.

The beneficial effects of the utility model are：

A kind of expansion link cam rotary positioning structure of the present utility model, by being socketed with swelling part on cam, stretch The outer tube of bar is socketed in outside swelling part, in use, only needing the inner tube of rotating extensible arm to drive rotating cylinder rotation, cam is existed The endoporus of swelling part rotates, and because endoporus is provided with the change section that radius tapers into, therefore the boss on cam was rotating The inwall of endoporus is gradually held out against in journey so that swelling part is held out against by the outside distending of bore openings and is fixed on outer tube wall, from And the inner and outer tubes of expansion link is fixed connection, the utility model is outwards held out against outer using cam from the inwall of swelling part Pipe, its pressure is more stable so that and the flexible of expansion link is located by connecting reliable, and its is simple in construction, easy to operate, The inner tube for only needing gently rotating extensible arm is that the positioning between expansion link inner and outer pipe can be achieved.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation of rotating cylinder；

Fig. 3 is the structural representation of swelling part；

Fig. 4 is the decomposing schematic representation that the utility model is applied to expansion link；

Fig. 5 is the diagrammatic cross-section of expansion link；

Fig. 6 is view when swelling part inside contracts；

View when Fig. 7 is swelling part distending.

Embodiment

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

Referring to figs. 1 to Fig. 7, a kind of expansion link cam rotary positioning structure of the present utility model, including rotating cylinder 1 and swollen Tight part 2, the rotating cylinder 1 are included with the connection end 11 being connected with expansion link inner tube 3, and the structure of connection end 11 can be for one The component that cylinder or multiple connectors are formed, the structure type of connection end 11 of the present utility model include but is not limited to Said structure, rotating cylinder 1 are located at the upper end of connection end 11 and are provided with cam 12, and the outer wall of cam 12 is provided with boss 121, described Swelling part 2 is provided with endoporus 20, and the side wall of the endoporus 20, which has, is easy to swelling part 2 by outside distending during power from inside to outside Opening 200, endoporus 20 is provided with the change section 201 that radius tapers into, and swelling part 2 is actively socketed on cam by endoporus 20 On 12 outer walls, boss 121 can be rotated so that the distending of swelling part 2 or inside contracting along change section 201.The utility model passes through in cam Swelling part 2 is socketed with 12, the outer tube 4 of expansion link is set in outside swelling part 2, and the inner tube 3 of expansion link, which is locked, is fixed on column spinner On the connection end 11 of body 1, in use, only needing the inner tube 3 of rotating extensible arm to drive rotating cylinder 1 to rotate, make cam 12 swollen The endoporus 20 of tight part 2 rotates, because endoporus 20 is provided with the change section 201 that radius tapers into, therefore the boss on cam 12 121 gradually hold out against the inwall of endoporus 20 so that swelling part 2 is open 200 outside distendings by endoporus 20 and pushed up in rotation process Fasten in the inwall of outer tube 4, so that the inner tube 3 of expansion link and outer tube 4 are fixed connection, the utility model uses cam 12 Outer tube 4 is outwards held out against from the inwall of swelling part 2, its pressure is more stable so that the flexible of expansion link is located by connecting that compare can Lean on, and its is simple in construction, it is easy to operate, only need the inner tube 3 of gently rotating extensible arm that expansion link inner and outer pipe 3,4 can be achieved Between positioning, in addition the inwall of swelling part 2 outwards distending can be held out against outside by the smaller horizontal pressure of boss 121 On pipe 4, it can be long-term use of without damaging, and effectively improves the service life of location structure.

Reference picture 2, in the utility model, the cam 12 includes center column, and the center column outer wall is provided with Outwardly boss 121, boss 121 can be provided with multiple, and multiple boss 121 are distributed on center column outer wall, By being provided with multiple boss 121, so that when cam 12 holds out against swelling part 2, swelling part 2 can outwards be held out against by multiple Power is so that it is more close to hold out against on the inwall of expansion link outer tube 4, so as to further improve the flexible positioning of expansion link Reliability.

Reference picture 3, in order that obtaining swelling part 2 preferably outside distending can hold out against on the inwall of outer tube 4, the swelling part 2 include with the quantity identical body 21 of boss 121, multiple bodies 21, which enclose, to be located on the outer wall of cam 12, and each body 21 is distinguished The boss 121 of corresponding cam 12 is provided with one section of change section 201, so that each boss 121 can correspond to a body 21 Rotate and outward eject and hold out against on the inwall of outer tube 4 so that inner tube 3 and the connection of outer tube 4 are more reliable.The utility model In, an appropriate number of boss 121 and body 21 can be set according to the pipe diameter size of expansion link, for example expansion link caliber is larger When can suitably increase the quantity of boss 121 and body 21, so as to effectively improve the reliability of connection.

Reference picture 6 and Fig. 7, it is the multiple in order to rotate the scope for carrying out guide-localization and limiting its rotation to cam 12 Body 21 joins from beginning to end so that the junction of two neighboring body 21 is initial swollen formed with the bumping post 202 for limit cam 12 During tight 2 non-distending of part, the maximum of endoporus 20 that the boss 121 of cam 12 be located at swelling part 2 is the starting point of change section 201, Cam 12 can only rotate when rotating toward the other end of the section 201 relative to bumping post 202 is changed, as the radius of endoporus 20 becomes small boss 121 Gradually hold out against on the inwall of endoporus 20 and outwards hold out against body 21 on the inwall of expansion link outer tube 4.

In order to prevent swelling part 2 from easily being dropped out from cam 12, the upper and lower ends of cam 12 stretch out respectively to be set Upper and lower limit bit platform 14,13 is equipped with, the swelling part 2 is arranged between two limiting platforms, so that using process In, swelling part 2 is active between upper and lower limit bit platform 14,13 always.

In order to which when installing and using, rotating cylinder 1 can be stretched into more swimmingly in outer tube 4, the upper limit bit platform 14 Upper end is provided with the introduction part 141 of taper so that rotating cylinder 1 can be stretched into more smoothly in outer tube 4 by introduction part 141.

In order to reduce the usage amount of material, mitigate the weight of the location structure, be arranged to hollow inside the rotating cylinder 1 Structure, so as to effectively reduce material usage and weight, reduce the cost of making.

Preferred embodiment of the present utility model is the foregoing is only, not to limit the utility model, as long as with Essentially identical means realize that the technical scheme of the utility model purpose is belonged within the scope of protection of the utility model.

Claims

A kind of 1. expansion link cam rotary positioning structure, it is characterised in that：Including rotating cylinder and swelling part, the rotating cylinder Including the connection end for being connected with expansion link inner tube, rotating cylinder is located at connection end upper end and is provided with cam, outside the cam Wall is provided with boss, and the swelling part is provided with endoporus, and the side wall of the endoporus has opening, and endoporus is provided with radius and gradually become Small change section, swelling part are actively socketed on cam outer wall by endoporus, and the boss can be rotated so that swollen along change section Tight part distending inside contracts.
A kind of 2. expansion link cam rotary positioning structure according to claim 1, it is characterised in that：The boss is provided with Multiple, multiple boss are distributed on cam outer wall.
A kind of 3. expansion link cam rotary positioning structure according to claim 2, it is characterised in that：The swelling part includes Have with boss quantity identical body, multiple bodies, which enclose, to be located on cam outer wall, and the boss that each body corresponds to cam respectively is set It is equipped with one section of change section.
A kind of 4. expansion link cam rotary positioning structure according to any one of claims 1 to 3, it is characterised in that：It is described convex Wheel upper and lower ends stretch out respectively is provided with upper and lower limit bit platform, and the swelling part is arranged between two limiting platforms.
A kind of 5. expansion link cam rotary positioning structure according to claim 4, it is characterised in that：The upper limit bit platform Upper end be provided with the introduction part of taper.
A kind of 6. expansion link cam rotary positioning structure according to claim 1, it is characterised in that：In the rotating cylinder Portion is arranged to hollow structure.