CN111544140A

CN111544140A - Implant leading-in actual measurement fixed point device

Info

Publication number: CN111544140A
Application number: CN202010479124.8A
Authority: CN
Inventors: 胡波; 曹甜; 逯宜; 郝欢萌; 高翠翠
Original assignee: Stomatological Hospital Of Xi'an Jiaotong University
Current assignee: Stomatological Hospital Of Xi'an Jiaotong University
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-08-18
Anticipated expiration: 2040-05-29
Also published as: CN111544140B

Abstract

The invention discloses an implant leading-in actual measurement positioning device which comprises an external mounting head, a mounting seat, a middle rod, a fixed seat and a limiting cylinder, wherein the bottom of the external mounting head is provided with a stop rod, the top end of the stop rod is arranged outside a connecting cylinder, the middle key of the connecting cylinder is connected with a rotating shaft, the bottom of the fixed seat is integrally connected with the middle rod, the back surface of the middle rod is embedded with a sliding groove, a rotating gear is arranged inside the sliding groove, the middle of the rotating gear is coaxially connected with a rotating rod, and the rotating rod is arranged in the middle of a middle hole. When the implant leading-in actual measurement fixed point device is used, the mounting and fastening work between the implant leading-in actual measurement fixed point device and an external mounting head can be very tightly finished, the whole mounting tightness is not loosened along with the time, the mounting work safety of the whole fixed point device is very high, and the whole fixed point device can continuously adjust the height of the fixed point.

Description

Implant leading-in actual measurement fixed point device

Technical Field

The invention relates to the technical field of implant correlation, in particular to an implant leading-in actual measurement fixed point device.

Background

The implant is a dental implant, generally called as an artificial tooth root, which is an auxiliary device for mounting a false tooth in the oral cavity, and when the false tooth is mounted, as long as the position of the implant is determined without errors, the mounting offset phenomenon cannot occur in the mounting work of the false tooth, so that the mounting and positioning work of the implant is very important, and therefore, when the implant is introduced into a dental bed, a fixed point device is required to be used, and the fixed point device in the existing market has the following problems when in use;

1. the existing pointing device in the market is generally mutually installed with the top end of a small-sized drilling device, so that the effect that the drilling device drives the whole pointing device to rotate is achieved, and the whole pointing device further rotates to reach a proper position in a gum;

2. the height of a common pointing device is fixed, and only one depth of punching work can be performed on the gum, so that the use range of the whole pointing device is too limited.

We therefore propose an implant introduction site finding apparatus to address the problems set out above.

Disclosure of Invention

The invention aims to provide an implant introduction actual measurement positioning device, which is used for solving the problems that the installation of the implant introduction actual measurement positioning device in the current market is not fastened when the implant introduction actual measurement positioning device is used, and the use range of the whole positioning device is too limited.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an leading-in actual measurement fixed point device of planting body, includes outside installation head, mount pad, intermediate lever, fixing base and a spacing section of thick bamboo, its characterized in that: the bottom of the external mounting head is provided with a stop lever, the top end of the stop lever is arranged outside the connecting cylinder, the middle key of the connecting cylinder is connected with a rotating shaft, two sides of the rotating shaft are connected with the inner wall of the preformed groove embedded in the inner side of the mounting seat through bearings, the outer part of the connecting cylinder is also integrally provided with a fixed cylinder, the interior of the fixed cylinder is connected with the bottom of the movable cylinder through a return spring, an external mounting head is arranged in the middle of the movable cylinder, the external mounting head is integrally arranged in the mounting seat, and the bottom of the mounting seat is integrally provided with a fixed seat, the bottom of the fixed seat is integrally connected with an intermediate rod, the back of the intermediate rod is embedded with a sliding groove, and a rotating gear is arranged in the sliding groove, a rotating rod is coaxially connected in the middle of the rotating gear, and the rotating rod is arranged in the middle of the middle hole, and the middle hole penetrates through the middle position of the limiting barrel.

Preferably, the cross section of the mounting seat is in a U-shaped structure, the mounting seat is mutually clamped with the bottom of the external mounting head, and the inner side of the mounting seat is embedded with a reserved groove at equal intervals.

Preferably, the surface of the middle rod is provided with scales, the back surface of the middle rod is embedded with a sliding groove, and one side of the inner wall of the sliding groove is provided with tooth blocks at equal intervals; the tooth block and the rotary gear are meshed with each other, a transition fit clamping mounting structure is arranged between the rotary rod in the middle of the rotary gear and the middle hole, and a transition fit clamping mounting structure is arranged outside the limiting barrel and the middle rod.

Preferably, the rotating shaft is in key connection with the connecting cylinder, a stop lever and a fixed cylinder are respectively fixed outside the connecting cylinder, and the stop lever and the fixed cylinder are vertically arranged.

Preferably, the section of the stop lever is in an L-shaped structure, and the lowest point of the stop lever is in contact with the top end of the inner wall of the mounting seat.

Preferably, the movable cylinder in the fixed cylinder is of a left-right sliding structure, the top end of the movable cylinder is integrally connected with the extrusion plate, the extrusion plate is of an arc-shaped structure, and two extrusion blocks are uniformly distributed on the top end of the extrusion plate of the arc-shaped structure at equal intervals.

Preferably, a spring hook is fixedly and transversely arranged between the two extrusion blocks, a plurality of limiting grooves are uniformly distributed on the peripheral side surface of the external mounting head, an L-shaped limiting plate is fixedly connected in each limiting groove, and the L-shaped limiting plates are matched and locked with the spring hook.

Preferably, the both sides position of a movable section of thick bamboo is provided with the slider, and is sliding connection between the outside slider of a movable section of thick bamboo and the spout of a fixed section of thick bamboo inner wall to be transition fit's block mounting structure between the spout of a fixed section of thick bamboo inner wall and the outside slider of a movable section of thick bamboo, the length of the spout of a fixed section of thick bamboo inner wall is two-thirds of a fixed section of thick bamboo length simultaneously, and the axis of the spout of a fixed section of thick bamboo inner wall and the inside axis of a fixed section of thick bamboo coincide each other.

Preferably, the outer wall surface of the connecting cylinder is further embedded with a plurality of clamping grooves, the clamping grooves are vertically arranged, the clamping grooves are mutually clamped with the top ends of the fixing pins, and the fixing pins and the through holes are in transition fit.

Preferably, a horizontal lower limiting tooth is welded on the stop lever, and a horizontal upper limiting tooth matched and locked with the horizontal lower limiting tooth is welded at the bottom of the external mounting head.

Compared with the prior art, the invention has the beneficial effects that: this leading-in actual measurement fixed point device of planting body is when using, the completion that can be very tight and the installation fastening work between the outside installation head, and the fastening of whole installation, also can not appear not hard up phenomenon along with the extension of time and take place for the security of whole fixed point device installation work is very high, and whole fixed point device can be continuous to its height of need fixed point adjust work, makes the application range of whole device very wide:

1. when the external mounting head is clamped inside the mounting seat, the whole rotary rod can drive the connecting cylinder to rotate, and when the connecting cylinder rotates, the external fixed cylinder and the external movable cylinder can also rotate, when the whole rotary rod is positioned at the lowest position, the fixed cylinder and the movable cylinder are positioned at the horizontal position at the moment, and the telescopic work of the movable cylinder in the fixed cylinder is matched, so that the outer wall of the middle external mounting seat can be well extruded, the effect of clamping the external mounting seat is achieved, meanwhile, the friction force between the whole movable cylinder and the external mounting head can be further increased by arranging the extrusion plate and the extrusion block on the top end, and the external mounting head can be mounted more tightly;

2. when the rotary rod rotates, the rotary gear coaxially connected with the top end of the rotary rod can rotate, when the rotary gear rotates, the rotary gear can be meshed with the tooth block inside the sliding groove, when the rotary gear is meshed with the tooth block, the position of the tooth block is fixed, so that the rotary gear can drive the whole limiting cylinder to move up and down outside the middle rod, and when the limiting cylinder moves up and down, the distance of the middle rod below the limiting cylinder can be adjusted, and therefore, the effect of adjusting the fixed-point distance can be well achieved;

3. in the locking process, the L-shaped limiting plate and the spring hook are used for realizing a locking structure, so that the external mounting head and the mounting seat are locked up and down, and then the horizontal upper limiting tooth and the horizontal lower limiting tooth are combined to realize horizontal locking between the external mounting head and the mounting seat.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is an enlarged view of the connection between the external mounting head and the mounting base;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic top view of the connection between the mounting base and the external mounting head according to the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4 according to the present invention;

FIG. 6 is a schematic view of the structure of the back of the middle rod and the position-limiting cylinder of the present invention;

FIG. 7 is a rear view of the intermediate shaft according to the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 2 at C according to the present invention.

In the figure: 1. an external mounting head; 2. a mounting seat; 3. an intermediate lever; 4. a fixed seat; 5. a limiting cylinder; 6. a rotating shaft; 7. a stop lever; 8. a fixed cylinder; 9. a return spring; 10. a movable barrel; 1001. a pressing plate; 1002. extruding the block; 11. reserving a groove; 12. a connecting cylinder; 1201. a clamping groove; 13. a fixing pin; 14. a through hole; 15. a sliding groove; 1501. a tooth block; 16. rotating the rod; 17. a middle hole; 18. a rotating gear; 19. a slider; 20. a spring hook; 21. an L-shaped limiting plate; 22. a limiting groove 23 and a horizontal upper limiting tooth; 24. horizontal lower limit teeth, 25-arc guide edge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: an implant leading-in actual measurement fixed point device comprises an external mounting head 1, a mounting seat 2, a middle rod 3, a fixed seat 4, a limiting barrel 5, a rotating shaft 6, a stop rod 7, a fixed barrel 8, a reset spring 9, a movable barrel 10, an extrusion plate 1001, an extrusion block 1002, a reserved groove 11, a connecting barrel 12, a clamping groove 1201, a fixed pin 13, a through hole 14, a sliding groove 15, a tooth block 1501, a rotating rod 16, a middle hole 17 and a rotating gear 18, wherein the stop rod 7 is arranged at the bottom of the external mounting head 1, the top end of the stop rod 7 is arranged outside the connecting barrel 12, the middle key of the connecting barrel 12 is connected with the rotating shaft 6, two sides of the rotating shaft 6 are connected with the inner wall of the reserved groove 11 embedded in the mounting seat 2 through bearings, the fixed barrel 8 is integrally arranged outside the connecting barrel 12, and the inside of the fixed barrel 8 is connected with the bottom of the movable barrel 10 through the reset spring, the middle of the movable barrel 10 is provided with an external mounting head 1, the external mounting head 1 is integrally arranged inside the mounting base 2, the bottom of the mounting base 2 is integrally provided with a fixing base 4, the bottom of the fixing base 4 is integrally connected with an intermediate rod 3, the back of the intermediate rod 3 is inlaid with a sliding groove 15, a rotating gear 18 is arranged inside the sliding groove 15, the middle of the rotating gear 18 is coaxially connected with a rotating rod 16, the rotating rod 16 is arranged in the middle of a middle hole 17, and the middle hole 17 penetrates through the middle position of the limiting barrel 5.

The cross-section of mount pad 2 is "U" shape structure setting, and the mutual block in bottom of mount pad 2 and outside installation head 1 to the inboard impartial interval of inside of mount pad 2 inlay has 4 preformed grooves 11, conveniently makes and can carry out preliminary block positioning work between outside installation head 1 and the mount pad 2, guarantees when installing, does not need the long-time position fixing work who carries out mount pad 2 of staff.

The surface of intermediate lever 3 is provided with the scale, and the back of intermediate lever 3 is inlayed and is had sliding tray 15 to sliding tray 15's inner wall one side equidistant tooth piece 1501 that is provided with, the setting of scale on the intermediate lever 3 can conveniently control the length of intermediate lever 3 protrusion spacing section of thick bamboo 5, reaches the convenience and fixes a position the work to the inside not co-altitude of teethridge.

For the key-type connection between rotation axis 6 and the connecting cylinder 12, and the outside of connecting cylinder 12 is fixed with pin 7 and solid fixed cylinder 8 respectively to set up perpendicularly between pin 7 and the solid fixed cylinder 8, make when pin 7 along with whole connecting cylinder 12 rotates to the vertical position, gu fixed cylinder 8 can be in the horizontally state, reach the effect that the convenience is carried out the extrusion to the outside of external installation head 1 under gu fixed cylinder 8's effect.

The section of pin 7 is "L" shape structure setting, and the minimum point of pin 7 contacts with the inner wall top of mount pad 2 for when the inside block of external installation head 1 and mount pad 2 is carried out, can be automatic accomplish the rotation work of connecting cylinder 12 through pin 7.

The inside movable barrel 10 of a fixed cylinder 8 is the horizontal slip structure, and the top an organic whole of a movable barrel 10 is connected with stripper plate 1001, and stripper plate 1001 is the arc structure setting, the even distribution in top of stripper plate 1001 who is the arc structure simultaneously has stripper block 1002, the both sides position of a movable barrel 10 is provided with the slider, and be sliding connection between the slider of a movable barrel 10 outside and the spout of a fixed cylinder 8 inner wall, and be transition fit's block mounting structure between the spout of a fixed cylinder 8 inner wall and the slider of a movable barrel 10 outside, the length of the spout of a fixed cylinder 8 inner wall is two-thirds of a fixed cylinder 8 length simultaneously, the axis of the spout of a fixed cylinder 8 inner wall and the inside axis of a fixed cylinder 8 coincide each other, the horizontal slip structure of a movable barrel 10 is convenient carries out fastening work to external installation head 1 according to the size of a dimension of external installation head 1, and reach that setting through stripper plate 1001 and stripper block 1002 that the arc structure set up also can be fine to The effect that dress head 1 carries out the fastening connection can not appear connecting not hard up the phenomenon and take place, and the setting of spout and slider guarantees gliding very stable between a fixed section of thick bamboo 8 and a movable section of thick bamboo 10.

In order to improve the up-down locking effect between the movable cylinder 10 and the external mounting head 1, further, a spring hook 20 is fixedly and transversely arranged between the two extrusion blocks 1002, a plurality of limiting grooves 22 are uniformly distributed on the peripheral side surface of the external mounting head 1, an L-shaped limiting plate 21 is fixedly connected in each limiting groove 22, the L-shaped limiting plate 21 is matched and locked with the spring hook 20, the spring hook 20 is formed by integrally bending a spring steel material, when the spring hook 20 is extruded under the driving of the extrusion plate 1001, the spring hook can move backwards under the action of a spring, the horizontal locking of the spring hook 20 and the L-shaped limiting plate 21 is carried out the 'abdicating' operation, when the spring hook 20 slides to the tail end of the L-shaped limiting plate 21 along the bottom edge of the L-shaped limiting plate 21 under the self-deforming function, the L-shaped limiting plate 21 can be automatically hooked, the locking and limiting of the upper position and the lower position of the external mounting head 1 are realized, so that the external mounting head 1 is locked and connected at the upper position and the lower position;

preferably, the side surface of the external mounting head 1 is processed with one limiting groove 22 by milling technology or drilling technology, the L-shaped limiting plate 21 is welded in the limiting groove 22 by spot welding, an arc-shaped guiding edge is milled at the upper part and the lower part of the opening edge of the limiting groove 22, and the locking efficiency of the L-shaped limiting plate 21 and the spring hook 20 can be improved by the design of the arc-shaped guiding edge 25.

In order to improve the locking effect between the external mounting head 1 and the stop lever 7, and realize the horizontal locking, the further improvement of the application is: a horizontal lower limiting tooth 23 is welded on the stop lever 7, a horizontal upper limiting tooth 24 which is matched and locked with the horizontal lower limiting tooth 23 is welded at the bottom of the external mounting head, and the external mounting head 1 and the stop lever 7 are horizontally locked in a tooth clamping mode between the horizontal lower limiting tooth 23 and the horizontal upper limiting tooth 24 while the locking of the L-shaped limiting plate 21 and the spring hook 20 is realized;

the outer wall surface of connecting cylinder 12 still inlays 2 block groove 1201, and also sets up perpendicularly between 2 block groove 1201 to block groove 1201 and the mutual block in top of fixed pin 13, and be transition fit's block mounting structure between fixed pin 13 and the through hole 14, conveniently carry out fixing work to the position of connecting cylinder 12 under the effect of fixed pin 13, guarantee that the serious phenomenon of connecting cylinder 12 position rocks can not appear and take place.

Intermeshing between tooth piece 1501 and the rotating gear 18, and also for transition fit's block mounting structure between rotating rod 16 in the middle of the rotating gear 18 and the middle hole 17, spacing section of thick bamboo 5 is transition fit's block mounting structure with the outside of middle pole 3, conveniently carries out position change work with spacing section of thick bamboo 5 in the outside of middle pole 3, simultaneously through the size of interval between each tooth piece 1501, conveniently control the effect to the height that spacing section of thick bamboo 5 removed, can not consume a large amount of time when the distance is adjusted.

The working principle of the embodiment is as follows: when the implant is used to introduce an actual measurement pointing device, first, when it is necessary to install the fixing base 4 of the entire pointing device between the external mounting head 1 and the fixing base 4, the entire device is moved upward as shown in fig. 1-5, so that the mounting base 2 of the entire fixing base 4 is moved upward at the bottom of the external mounting head 1, and further the bottom of the external mounting head 1 is in contact with the pin 7 inside the mounting base 2, and further the pin 7 is pressed, and since the top end of the pin 7 is connected to the outside of the rotating shaft 6, the top end of the pin 7 is rotated inside the mounting base 2, and when the entire pin 7 is rotated 90 degrees, the top end of the entire pin 7 is in a horizontal position, and the top end of the entire external mounting head 1 is also in a position above the pin 7, and when the pin 7 is rotated, due to the rotation of the rotating shaft 6, the fixed cylinder 8 on the rotating shaft 6 can also rotate 90 degrees after the stop lever 7 rotates 90 degrees, the movable cylinder 10 at the top end of the fixed cylinder 8 can extrude the outside of the external mounting head 1 after the fixed cylinder 8 rotates 90 degrees, the clamping effect on the external mounting head 1 is well completed by matching the arrangement of the extrusion plate 1001 at the top end of the movable cylinder 10 and the extrusion block 1002, and the external mounting head 1 and the mounting seat 2 are locked up and down through the locking of the L-shaped limiting plate 21 and the spring hook 20 structure; meanwhile, the horizontal lower limit teeth 23 on the stop lever 7 are in horizontal locking connection with the horizontal upper limit teeth 24 on the external mounting head 1, so that the common locking purpose of the upper, lower, left and right positions between the mounting base 2 and the external mounting head 1 can be realized through the L-shaped limit plate 21 and the spring hook 20 as well as the horizontal lower limit teeth 23 and the horizontal upper limit teeth 24, and after the two are locked, the upper, lower, left and right positions have no degree of freedom and are mutually pulled; after the engagement, as shown in fig. 5, the worker only needs to insert the fixing pin 13 into the through hole 14, so that the top end of the fixing pin 13 and the engaging groove 1201 on the exterior of the connecting cylinder 12 are engaged with each other, and the effect of determining the position of the whole connecting cylinder 12 is achieved, and the phenomenon that the rotating shaft 6 slides randomly does not occur, thereby the installation work between the whole device and the external installation head 1 is well achieved;

after the installation is completed, the length of the middle rod 3 at the bottom of the limiting cylinder 5 needs to be controlled, when the adjustment is performed, as shown in fig. 1 and 6-7, only the worker needs to rotate the rotating rod 16, so that the rotating rod 16 rotates inside the middle hole 17, when the rotating rod 16 rotates, the rotating gear 18 at the top end of the rotating rod is driven to rotate, when the rotating gear 18 rotates, the gear tooth-like structure at the outer part of the rotating gear 18 is meshed with the gear block 1501 inside the sliding groove 15, and under the action that the position of the gear block 1501 is fixed, the position of the whole rotating gear 18 is changed, so that the whole rotating gear 18 drives the whole limiting cylinder 5 to perform the up-and-down movement work at the outer part of the middle rod 3, therefore, when the limiting cylinder 5 performs the up-and-down movement, the height of the middle rod 3 exposed at the bottom of the limiting cylinder is adjusted, the setting of the outside scale of 3 middle poles of cooperation can be with accurate completion altitude mixture control work, reach the convenience and carry out the leading-in effect of fixed point to the degree of depth of difference to accomplish a series of work.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an leading-in actual measurement fixed point device of planting body, includes outside installation head (1), mount pad (2), intermediate lever (3), fixing base (4) and spacing section of thick bamboo (5), its characterized in that: the bottom of the external mounting head (1) is provided with a stop lever (7), the top end of the stop lever (7) is arranged outside the connecting cylinder (12), the middle key of the connecting cylinder (12) is connected with a rotating shaft (6), two sides of the rotating shaft (6) are connected with the inner wall of a preformed groove (11) embedded in the inner side of the mounting seat (2) through bearings, the outside of the connecting cylinder (12) is further integrally provided with a fixed cylinder (8), the inside of the fixed cylinder (8) is connected with the bottom of a movable cylinder (10) through a reset spring (9), the middle of the movable cylinder (10) is provided with the external mounting head (1), the external mounting head (1) is integrally arranged inside the mounting seat (2), the bottom of the mounting seat (2) is integrally provided with a fixing seat (4), the bottom of the fixing seat (4) is integrally connected with a middle lever (3), and the back of the middle lever (3) is embedded with a sliding groove (15), and a rotating gear (18) is arranged in the sliding groove (15), a rotating rod (16) is coaxially connected in the middle of the rotating gear (18), the rotating rod (16) is arranged in the middle of a middle hole (17), and the middle hole (17) penetrates through the middle position of the limiting barrel (5).

2. The device of claim 1, wherein the device comprises: the cross-section of mount pad (2) is "U" shape structure setting, and the mutual block in bottom of mount pad (2) and outside installation head (1) to the equal interval's of inside inboard of mount pad (2) is inlayed and is had 4 preformed groove (11).

3. The device of claim 1, wherein the device comprises: scales are arranged on the surface of the middle rod (3), a sliding groove (15) is embedded in the back of the middle rod (3), and tooth blocks (1501) are arranged on one side of the inner wall of the sliding groove (15) at equal intervals; the tooth block (1501) is meshed with the rotary gear (18), a transition fit clamping mounting structure is arranged between the rotary rod (16) in the middle of the rotary gear (18) and the middle hole (17), and a transition fit clamping mounting structure is arranged outside the limiting cylinder (5) and the middle rod (3).

4. The device of claim 1, wherein the device comprises: be the key-type connection between rotation axis (6) and connecting cylinder (12), and the outside of connecting cylinder (12) is fixed with pin (7) and solid fixed cylinder (8) respectively to set up perpendicularly between pin (7) and solid fixed cylinder (8).

5. The device of claim 1, wherein the device comprises: the section of the stop lever (7) is arranged in an L-shaped structure, and the lowest point of the stop lever (7) is in contact with the top end of the inner wall of the mounting seat (2).

6. The device of claim 1, wherein the device comprises: the movable barrel (10) in the fixed barrel (8) is of a left-right sliding structure, the top end of the movable barrel (10) is integrally connected with an extrusion plate (1001), the extrusion plate (1001) is of an arc-shaped structure, and two extrusion blocks (1002) are uniformly distributed on the top end of the extrusion plate (1001) of the arc-shaped structure at equal intervals.

7. The device of claim 6, wherein the device comprises: the two extrusion blocks (1002) are fixedly and transversely provided with spring hooks (20), a plurality of limiting grooves (22) are uniformly distributed on the side face of the periphery of the external mounting head (1), each limiting groove (22) is internally and fixedly connected with an L-shaped limiting plate (21), and the L-shaped limiting plates (21) are matched and locked with the spring hooks (20).

8. The device of claim 1, wherein the device comprises: the both sides position of a movable cylinder (10) is provided with the slider, and be sliding connection between the outside slider of a movable cylinder (10) and the spout of a fixed cylinder (8) inner wall, and be transition fit's block mounting structure between the spout of a fixed cylinder (8) inner wall and the outside slider (19) of a movable cylinder (10), the length of the spout of a fixed cylinder (8) inner wall is two-thirds of a fixed cylinder (8) length simultaneously, the axis of the spout of a fixed cylinder (8) inner wall and the inside axis of a fixed cylinder (8) coincide each other.

9. The device of claim 1, wherein the device comprises: the outer wall surface of connecting cylinder (12) still inlays 2 and has block groove (1201), and also sets up perpendicularly between 2 block groove (1201) to block groove (1201) and the top of fixed pin (13) are each other block, and are transition fit's block mounting structure between fixed pin (13) and through hole (14).

10. The device of claim 1, wherein the device comprises: the stop lever (7) is welded with a horizontal lower limiting tooth (23), and the bottom of the external mounting head (1) is welded with a horizontal upper limiting tooth (24) matched and locked with the horizontal lower limiting tooth (23).