CN108789268B

CN108789268B - Pulling tool

Info

Publication number: CN108789268B
Application number: CN201810433729.6A
Authority: CN
Inventors: 王建雨
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2016-09-21
Filing date: 2016-09-21
Publication date: 2020-07-17
Anticipated expiration: 2036-09-21
Also published as: CN106272238B; CN108789268A; CN108818400B; CN108818400A; CN106272238A

Abstract

The invention relates to a pulling tool, which comprises a driving mechanism and two synchronous transmission mechanisms, wherein the output end of the driving mechanism outputs forward and reverse linear reciprocating motion or forward and reverse rotary reciprocating motion, the two synchronous transmission mechanisms are in transmission connection between the output end of the driving mechanism and two pulling parts, and at least one of the driving mechanism, the synchronous transmission mechanisms and the pulling parts is provided with a locking structure for locking the left and right positions of the two pulling parts. In fact, the linear reciprocating motion or the rotary reciprocating motion output by the driving mechanism is used as input, the input is converted into two outputs which are opposite and opposite through the synchronous conversion of the two synchronous transmission mechanisms, the two pulling parts are driven to synchronously move opposite and opposite, and therefore the adjustment of the distance width between the pulling hooks of the two pulling parts is realized in a mode that the two pulling parts synchronously move opposite and opposite relative to the driving mechanism, and therefore the pulling tool has the advantages of convenience in alignment and smoothness in pulling.

Description

Pulling tool

The application is a divisional application of the following applications, the application date of the original application: 2016, 9/21, original application No.: 201610837376.7, title of original application: a pulling tool.

Technical Field

The invention relates to a pulling tool.

Background

At present, in industrial production, the machine box shown in fig. 1 is often used, the machine box includes a box body 11 with an open top, a plurality of functional modules 12 spaced front and back are assembled in the box body 11, the left and right sides of each functional module 12 are assembled on the side wall of the box body 11 along the up-down direction, and a pulling hole 13 at the top is provided on the front side surface of each functional module 12, the pulling holes 13 are two and are symmetrically arranged on the left and right sides of the front side surface, and the symmetric centers of the pulling holes 13 are on the central line of the box body 11, that is, the pulling holes 13 are also symmetrically arranged on the left and right sides of the box body 11.

When the functional module needs to be pulled out of the box body for maintenance, a printed circuit board pulling tool disclosed in chinese patent document CN105643557A can be used, the pulling tool includes a U-shaped support frame, the opening of the support frame is in the up-down direction, two ends of the support frame are positioning ends for being pressed against the opening edge of the box body, a handle is assembled on the support frame along the up-down direction, two pulling parts arranged in bilateral symmetry are assembled on the handle, the two pulling parts are mainly composed of pulling hooks extending up and down, the two pulling parts are connected in an adjusting long hole arranged on the handle through a bolt connecting structure, so that the pulling parts can move left and right under the guide of the adjusting long hole, and the pulling parts can move left and right relative to the support frame, so as to adapt to the pulling operation of the functional module with the pulling holes with different space widths. But because the left and right position adjustment of the two pulling parts in the pulling tool is realized by the bolt connecting structure which is relatively independently arranged, therefore, the left and right position adjustment of the two pulling parts is relatively independent, so that after the two pulling parts are adjusted in place, the symmetric centers of the two pulling parts are easy to deviate from the symmetric center line of the supporting frame, so that the positions of the pulling hooks of the two pulling parts and the positions of the two pulling holes on the functional module have offset in the left-right direction, although the pulling hook can still be inserted into the pulling eye under the influence of the long hole structure of the pulling eye, during the pulling, this offset causes a tendency of the functional module to deflect to the left or to the right, constrained by the walls of the tank, this deflection tendency can be converted into a pressing force of the tank wall acting on the corresponding side of the functional module, resulting in the functional module being crushed or damaged in the course of being pulled out.

Disclosure of Invention

The invention aims to provide a pulling tool to solve the problem that the pulling hook and the pulling hole are difficult to align in the prior art.

In order to achieve the above purpose, the technical scheme of the extraction tool of the invention is as follows:

the pulling tool comprises a support frame, a handle and two pulling parts which are assembled on the support frame in a left-right moving mode, wherein each pulling part comprises a pulling hook extending up and down; the device is characterized by further comprising a driving mechanism of which the output end outputs forward and reverse linear reciprocating motion or forward and reverse rotary reciprocating motion, and two synchronous transmission mechanisms which are connected between the output end of the driving mechanism and the two pulling-up components in a transmission manner and are used for converting the forward and reverse motion of the output part into synchronous opposite motion and synchronous opposite motion of the two pulling-up components, wherein at least one of the driving mechanism, the synchronous transmission mechanisms and the pulling-up components is provided with a locking structure for locking the left position and the right position of the two pulling-up components.

The output end of the driving mechanism outputs forward and reverse linear reciprocating motion, and the two synchronous transmission mechanisms respectively comprise a connecting rod mechanism connected between the output end of the driving mechanism and the corresponding pulling component.

The driving mechanism comprises a screw rod and a nut, the screw rod is rotatably assembled on the support frame around an axis extending up and down, the nut is connected to the screw rod, the output end of the driving mechanism is provided with a locking structure, and the locking structure is a thread matching structure between the screw rod and the nut.

The support frame is provided with a guide part which is matched with the screw nut in a guiding and moving manner along the up-down direction, and the guide part and the screw nut are correspondingly provided with a rotation stopping structure which is used for preventing the screw nut from rotating around the axis of vertical extension relative to the support frame.

The two pulling parts are respectively connected to the handle through a guide structure, the guide structure comprises a groove-shaped or hole-shaped channel part which is arranged on one of the pulling part and the handle and extends left and right, and a block-shaped or rod-shaped insertion part which is arranged on the other pulling part and is inserted in the slideway in a guiding and moving manner along the left and right direction, and the channel part and the insertion part are in blocking fit in the up and down direction.

More than two guide structures are arranged between each pulling component and the handle, and the channel parts in the guide structures are arranged in parallel.

The pulling hook comprises a moving sleeve which is assembled on the support frame in a guiding mode along the left-right direction, the moving sleeve and the support frame are in limit fit in the up-down direction, a pulling hook body penetrates through the moving sleeve in the up-down direction in the guiding mode, an adjusting nut capable of moving up and down relative to the pulling hook body is connected to the pulling hook body in a threaded mode, and a stop surface which is limited and stopped below the adjusting nut is arranged on the moving sleeve.

The hook pulling body and/or the adjusting nut are/is connected with a spring used for pressing the hook pulling body downwards on the stop surface.

The handle is located between the hook bodies of the two pulling hooks, the handle and the hook bodies are in limit fit in the up-down direction, avoidance openings used for avoiding connection structures between the handle and the hook bodies are arranged on opposite sides of the two moving sleeves of the two pulling hooks, and the avoidance openings extend up and down on the pipe walls of the moving sleeves.

The support frame comprises a support extending left and right and support legs which are arranged on two opposite sides of the two pulling parts in the left and right directions, the support legs are movably assembled on the support in the left and right directions, and the support legs are supported below the support.

The synchronous transmission mechanism of the invention can convert the forward and reverse linear reciprocating motion or rotary reciprocating motion output by the driving part into opposite and back-to-back motion in the left and right direction, this is actually the input of the linear reciprocating motion or the rotary reciprocating motion output by the driving mechanism, so as to convert the input into two opposite and opposite outputs through the synchronous conversion of the two synchronous transmission mechanisms, drive the two pulling parts to synchronously move towards and away from each other, thereby realizing the adjustment of the distance width between the pulling hooks of the two pulling components in a way that the two pulling components synchronously move in opposite directions and synchronously move in opposite directions relative to the driving mechanism, the invention solves the problem that the pulling hooks and the pulling holes are difficult to align in the prior art, and ensures that the pulling tool has the advantages of convenient alignment and smooth pulling.

Drawings

Fig. 1 is a schematic perspective view of a conventional chassis;

FIG. 2 is a schematic view of the structure of the extraction tool of the present invention;

FIG. 3 is a schematic perspective view of the extraction tool of FIG. 2;

FIG. 4 is a schematic structural view of the support of FIG. 2;

FIG. 5 is a schematic view of the construction of the alignment pin of FIG. 2;

FIG. 6 is a schematic structural diagram of the positioning paddle of FIG. 3;

FIG. 7 is a schematic structural view of the leg of FIG. 2;

FIG. 8 is a schematic view of the structure of the pull hook of FIG. 2;

FIG. 9 is a schematic structural view of the lower slider of FIG. 2;

FIG. 10 is a schematic view of the handle of FIG. 2;

FIG. 11 is a schematic view of the pitch bolt of FIG. 2;

FIG. 12 is a schematic view of the pitch nut of FIG. 2;

FIG. 13 is a schematic structural view of the drive link of FIG. 2;

FIG. 14 is a schematic structural view of the upper slider in FIG. 2;

fig. 15 is a schematic view of the structure of the traveling sleeve of fig. 2.

Detailed Description

Embodiments of the extraction tool of the present invention: the pulling tool is an industrial-grade adjustable pulling tool suitable for pulling out a functional module from a chassis, and mainly comprises a support frame, a pulling part, a distance adjusting mechanism and a depth adjusting mechanism, wherein the pulling part is arranged on the support frame so as to be capable of adapting to pulling holes with different distance widths on the functional module under the adjustment of the distance adjusting mechanism, as shown in fig. 2 and 3; under the regulation of the depth regulating mechanism, the depth regulating mechanism can be adapted to the pulling holes of different depths on the functional module in the box body.

The support frame mainly comprises a support 2 and supporting legs 3 symmetrically arranged on the left side and the right side of the support.

As shown in fig. 4, the cradle 2 is a box-like structure which is bilaterally symmetrical about a reference vertical surface extending forward and rearward, which is a central surface of the cradle 2 and defines that the length direction of the cradle 2 is in the left-right direction, the width direction is in the forward and rearward direction, and the thickness direction is in the up and down direction. The support 2 is further divided into an upper box body 201 and a lower box body 202 which are integrally formed, the length of the upper box body 201 is smaller than that of the lower box body 202, a distance scale 17 at the transition position of the upper box body 201 and the lower box body 202 is arranged on the front side wall surface of the support 2, the zero value of the distance scale 17 is located at the junction position of the central surface and the front side wall surface of the support 2, and the numerical value of the distance scale 17 is increased from the zero value to the left side and the right side of the support 2. Two pairs of positioning long holes 203 which are symmetrical left and right relative to the central plane of the support 2 are arranged on the lower box body 202, the positioning long holes 203 extend along the left and right direction and correspond to the numerical value distribution direction of the interval scales 17, and the positioning long holes 203 are oppositely arranged on the box walls at the front side and the rear side of the lower box body 202. Two pairs of upper distance adjusting long holes 204 which are mutually symmetrical left and right relative to the central plane of the support 2 are formed in the upper box body 201, the upper distance adjusting long holes 204 also extend along the left and right direction and correspond to the numerical value distribution direction of distance overcoming, the same pair of upper distance adjusting long holes 204 are oppositely arranged on the box walls on the front side and the rear side of the upper box body 201, the opposite parts of the two pairs of upper distance adjusting long holes 204 are positioned between the opposite parts of the two pairs of positioning long holes 203, and the back parts of the two pairs of upper distance adjusting long holes 204 are positioned between the back parts of the two pairs of positioning long holes 203. The bottom surface of support 2 is opened, has seted up two on the top surface of support 2 and has dodged opening 205 about the mutual bilateral symmetry of the central plane of support 2, dodges opening 205 and is the rectangle opening of extending about controlling. The top of the support 2 is further provided with a positioning boss 206 between the two avoiding openings 205, the positioning boss 206 is provided with a countersunk circular hole 207 at the center of the top surface, and the countersunk end of the countersunk circular hole 207 is located on the top surface of the support 2.

The structure comprises a support 2, a supporting leg 3, a positioning pin 4, a pin section 401, a positioning shifting block 501, a plug lifting block, a shifting block retainer 501, a plug lifting block, a lifting block, a plug lifting block, a lifting block, a lifting block, a lifting block, a lifting block, a lifting block, a lifting block, a lifting block.

The pulling part mainly comprises a pulling hook, an upper sliding block 12 and a lower sliding block 7. The two pulling parts are symmetrically arranged at the left side and the right side of the support 2 of the support frame, and the two pulling parts are positioned between the two support legs of the support frame. The pulling hook extends along the up-and-down direction and mainly comprises a movable sleeve 13 fixed on an upper slide block 12 and a pulling hook body 8 assembled in the movable sleeve.

As shown in fig. 8, the hook body 8 has a cylindrical column section 801 extending up and down, an external thread section extending from the upper end to the middle part is provided on the outer periphery of the column section 801, a circular locking shoulder 802 below the external thread section is convexly provided on the outer periphery of the column section 801, and an annular positioning slot 803 below the locking shoulder 802 is provided on the outer periphery of the column section 801; the lower end of the column section 801 is also provided with a hook part bent backwards, and the part bent backwards of the hook part is a pulling hook head 804 overhanging backwards.

The two hook pulling bodies 8 are connected to the handle 6 in bilateral symmetry through the lower sliding block 7. As shown in fig. 9, the lower slider 7 has a rectangular block-shaped slider main body 701, two rotation stopping pin holes 702 are formed in the slider main body 701 at intervals up and down, the two rotation stopping pin holes 702 both extend in the front-rear direction, and the two rotation stopping pin holes 702 are parallel to each other; a connecting sleeve 703 extending up and down is convexly arranged on the side surface of the slider body 701, when the slider body 701 is positioned at the right end of the handle 6, the connecting sleeve 703 is positioned at the right side of the slider body 701, when the slider body 701 is positioned at the left end of the handle 6, the connecting sleeve 703 is positioned at the left side of the slider, the connecting sleeve 703 is sleeved at a position between a positioning clamping groove 803 and a locking shoulder 802 on the periphery of the column section 801 of the hook pulling body 8, and the connecting sleeve 703 is locked on the column section 801 of the hook pulling body 8 in a mode of embedding a clamping ring in the positioning clamping groove 803; a screw hole 704 extending along the radial direction is formed in one side sleeve wall of the connecting sleeve 703 far away from the slider main body 701, a jackscrew abutting against the outer periphery of the column section 801 of the hook body 8 penetrates through the screw hole 704, and the connecting sleeve 703 is fixed on the column section 801 of the hook body 8 through the jackscrew; a strip-shaped guide block 705 extending up and down is transitionally arranged between the connecting sleeve 703 and the sliding block main body 701, and the front side and the rear side of the guide block 705 are provided with guide vertical faces parallel to each other.

As shown in fig. 10, the handle 6 is an H-shaped structure formed by two handle forks 601 disposed symmetrically left and right opposite to each other, each handle fork 601 has two wall plates 602 spaced front and back, each wall plate 602 has two guide holes 603 spaced up and down, the guide holes 603 extend in the left and right direction, the guide holes 603 on the two wall plates 602 of the same handle fork 601 are disposed in pairs front and back opposite to each other, that is, two pairs of guide holes 603 are disposed on the same handle fork 601, the same pair of guide holes 603 are disposed on the two wall plates 602 in front and back opposite to each other, and the two pairs of guide holes 603 are disposed in intervals up and down; the central part of the handle 6 and the central part of the support 2 are on the same axis.

After the slider body 701 of the lower slider 7 is fitted between the two wall plates 602 of the handle fork 601, each pin hole of the slider body 701 is aligned with and communicated with a pair of guide holes 603 of the handle fork 601, so that an insertion slide pin is inserted into a passage formed by the communication between the guide holes 603 and the pin holes, and the lower slider 7 can slide left and right along the guide holes 603 of the handle 6 under the guidance of the two insertion slide pins, thereby achieving the relative approaching and separating of the two hook bodies 8 in the left and right direction. Moreover, the outer peripheral surface of the insertion sliding pin and the wall surface of the guide hole 603 are in blocking fit in the up-down direction, so that the handle 6 can drive the lower sliding block 7 to move up and down, and then drive the hook pulling body 8 to move up and down.

As shown in fig. 15, the moving sleeve 13 is a sleeve that can be fitted around the outer periphery of the column section 801 of the hook 8. The outer thread section 131 and the rotation stopping plane 132 which is radially and symmetrically arranged are arranged on the outer periphery of the upper end of the movable sleeve 13, and the rotation stopping plane 132 is matched with the chord surface at the lower end of the sleeve body part 123 of the upper sliding block 12 to realize the rotation stopping matching between the upper sliding block 12 and the movable sleeve 13; the upper end of the rotation stopping plane 132 is located at the upper end edge of the movable sleeve 13, the lower end is located below the external thread section 131, and the distance between the lower edge of the external thread section 131 and the lower end edge of the rotation stopping plane 132 is not less than the height of the rotation stopping step 124 on the sleeve body 123 of the upper slide block 12. An avoiding opening 133 which is positioned below the rotation stopping plane 132 is formed in the lower section of the movable sleeve 13, the avoiding opening 133 extends from the lower end edge of the movable sleeve 13 to the position below the rotation stopping plane 132, the avoiding opening 133 is a rectangular opening and is matched with the guide block 705 of the lower slider 7, so that the guide block 705 of the lower slider 7 is in up-and-down sliding fit in the avoiding opening 133 of the movable sleeve 13, and the rotation stopping fit of a key groove between the hook pulling body 8 and the movable sleeve 13 is realized. The front side surface of the movable sleeve is also provided with a depth scale 18, and the numerical value of the depth scale 18 is gradually increased from top to bottom to indicate the depth of the pulling part.

As shown in fig. 14, the upper slider 12 has a fork head 121 for inserting the insertion end 113 of the transmission link 11, the fork head 121 is provided with two guide pin holes 122 spaced left and right, the guide pin holes 122 extend forward and backward, one of the two guide pin holes 122 near the opening of the fork head 121 is a guide slide pin inserted into the upper distance adjusting slot 204 and a hinge shaft between the transmission link 11 and the upper slider 12, and the other guide slide pin is simply a guide slide pin inserted into the upper distance adjusting slot 204, so as to prevent the upper sliding block 12 from rotating relative to the support 2 by providing two guiding pin holes 122 and the guiding sliding pins matching with them, under the guidance of the guide sliding pin, the upper sliding block 12 can move left and right on the support 2, and can be in stop fit with the support 2 in the up and down direction, thereby realizing the left-right movement assembly and the up-down limit matching of the movable sleeve 13 on the support 2; the back of the fork head part 121 is provided with a sleeve body part 123 in a circular sleeve shape, the sleeve body part 123 extends up and down, two rotation stopping steps 124 which are radially and symmetrically arranged are arranged in a lower port of the sleeve body part 123, opposite surfaces of the two rotation stopping steps 124 are chord surfaces which are parallel to each other and parallel to the axis of the sleeve body part 123, and therefore the lower port of the sleeve body part 123 is a kidney-shaped hole.

The distance adjusting mechanism is formed by combining three sub-structures of a driving mechanism, a synchronous transmission mechanism and a locking structure.

The driving mechanism is a screw rod and nut mechanism and mainly comprises a distance adjusting bolt 9 and a distance adjusting nut 10, and the locking structure is a threaded connection structure between the distance adjusting bolt 9 and the distance adjusting nut 10. The synchronous transmission mechanisms are two and symmetrically arranged at the left side and the right side of the driving mechanism, and the two synchronous transmission mechanisms have the following functions: the straight reciprocating motion output by the driving mechanism in the forward direction and the reverse direction and the downward direction is converted into synchronous opposite and synchronous opposite motion in the left and right direction, each synchronous transmission mechanism is a link mechanism formed by transmission links 11, and the transmission links 11 are single links; in other embodiments, each synchronous transmission mechanism may also be a link mechanism including more than two links.

As shown in fig. 11, the pitch bolt 9 has a screw rod portion 901 inserted into the countersunk circular hole 207 on the positioning boss 206 of the support 2, a limit ring groove 902 located above the external thread section is formed on the outer periphery of the screw rod portion 901, and a limit collar stopped at the lower end edge of the countersunk circular hole 207 is embedded in the limit ring groove 902; the upper end of the screw rod part 901 is provided with a circular limiting cap body 903 positioned in the countersunk part of the countersunk circular hole 207, the limiting cap body 903 is limited and stopped on an inner step at the bottom of the countersunk part of the countersunk circular hole 207, and a suspension ring capable of swinging is hinged on the limiting cap body 903.

As shown in fig. 12, the pitch nut 10 has a nut portion 101 in a circular sleeve shape, and the nut portion 101 is screwed onto an external thread section of a lead screw portion 901 of the pitch bolt 9 so that the nut portion 101 can move up and down with respect to the lead screw portion 901, and at the same time, the nut portion 101 can be locked at an arbitrary position on the lead screw portion 901 by a locking action of the screw engagement of the nut portion 101 and the lead screw portion 901. Four ears which are distributed in an X shape are convexly arranged on the periphery of the nut body, each ear can be guided to slide up and down under the guidance of a guide groove arranged in the support 2, and the groove wall of the guide groove is attached to the overhanging part of the ear to form a rotation stopping structure for preventing the adjusting nut 10 from rotating around a vertically extending axis relative to the support frame. Two of each of the four ears are a pair, one of the two pairs of ears is a blank ear 102, the other pair is a perforated ear 103 with a hinge hole 104, the blank ear 102 being shorter than the perforated ear 103.

The transmission connecting rod 11 is connected between the distance adjusting nut 10 and the upper slide block 12, so that a double-slide block structure is formed by the distance adjusting nut 10, the transmission connecting rod 11 and the upper slide block 12, the number of the double-slide block structures is two, and the two double-slide block structures are arranged in bilateral symmetry around the distance adjusting bolt 9. As shown in fig. 13, the transmission link 11 has a bar-shaped link body 111, one end of the link body 111 is provided with a connection fork 112, and the other end is provided with an insertion terminal 113, the connection fork 112 is hinged to the holed ear 103 by a hinge shaft around an axis extending forward and backward, and the insertion terminal 113 is hinged to the upper slider 12 by a hinge shaft around an axis extending forward and backward.

The depth adjusting mechanism mainly comprises a movable sleeve 13, an adjusting nut 14, a spring 15 and a pressing cap 16.

The upper end of the movable sleeve 13 is extended out above the covering portion 123 of the upper slider 12, and the extended portion is exposed above the upper slider 12, and the press cap 16 is screwed on the exposed portion. The pressing cap 16 is provided with a sleeve part which is in threaded connection with the periphery of the exposed part and an annular turnover cover which is limited and stopped above the movable sleeve 13, the inner hole of the turnover cover is a guide through hole for the column section 801 of the hook pulling body 8 to pass through, and the inner edge of the turnover cover is positioned in the upper port edge of the fixed sleeve; the lower end of the sleeve portion abuts against the upper end surface of the sleeve portion 123 of the upper slider 12, so that the movable sleeve 13 is fixed to the upper slider 12 by the press cap 16. The upper end of the pulling hook body 8 passes through the guiding through hole of the pressing cap 16 and penetrates out from the upper part of the pressing cap 16, the adjusting nut 14 is a butterfly nut which is in threaded connection with the penetrating part of the upper end of the pulling hook body 8, the threaded connection structure between the adjusting nut 14 and the pulling hook body 8 forms a screw and nut transmission pair, so that the pulling hook body 8 is driven to stretch and retract in the moving sleeve 13 by rotating the adjusting nut 14, and the upper ring end surface of the moving sleeve 13 forms a stopping surface stopped below the adjusting nut 14. The spring 15 is a cylindrical helical spring, the spring 15 is sleeved on the periphery of the column section 801 of the hook pulling body 8, the upper end of the spring 15 abuts against the inner edge of the turning cover of the pressing cap 16, and the lower end of the spring 15 abuts against the locking shoulder 802, so that the spring 15 always applies downward elastic pressing force to the hook pulling body 8, and the adjusting nut 14 is pressed on the hole edge at the upper end of the guide through hole.

The working principle of the extraction tool in this embodiment is as follows:

1) the distance adjusting bolt 9 is rotated, and along with the rotation of the distance adjusting bolt 9, the distance adjusting nut 10 can not rotate but only move up and down under the constraint of the two transmission connecting rods 11;

2) along with the up-and-down movement of the pitch adjusting nut 10, the pitch adjusting nut 10 drives the upper slide block 12 to move left and right on the support 2 through the transmission connecting rod 11, further driving the movable sleeve 13 and the pulling hook body 8 therein to move left and right, meanwhile, the pulling hook body 8 drives the lower slide block 7 to move left and right on the handle 6, so as to realize the space width L between the pulling hook heads 804 of the two pulling parts₁Adjusting;

3) after the positioning pin 4 is unscrewed, the positioning shifting block 5 is shifted along the positioning long hole 203 so as to drive the support legs 3 to translate left and right under the driving of the positioning pin 4, and the positioning pin 4 is screwed after the positioning pin is adjusted in place so as to realize the space width L between the two support legs 3₂Adjusting;

4) by screwing the adjusting nut, the up-and-down movement of the hook body 8 is achieved, so as to align the maximum distance H between the hook-up head 804 of the hook body 8 and the positioning surface 304 of the leg 3₁Adjusting;

5) the pulling tool is abutted against the top of the case, the positioning surface 304 of the supporting leg 3 of the pulling tool is abutted against the top surface of the opening edge of the case, the pulling hook head 804 extends into the case and is positioned at a position aligned with the front and the back of the pulling hole, the pulling hook head 804 is inserted into the pulling hole after the backward translation, and then the handle 6 is pulled upwards to pull the functional module out of the case.

In this embodiment, the lower slider 7 of the pulling tool is locked on the hook body 8 through the jackscrew, so that the rotation of the hook body 8 is avoided through the key slot matching structure between the lower slider 7 and the movable sleeve 13. The distance adjusting mechanism takes the distance adjusting bolt 9 as the only power input part, and realizes the synchronous movement of the two hook pulling bodies 8 in the distance adjusting process in a mode of carrying out power transmission by the two double-slider mechanisms, which actually takes the central positions of the two hook pulling bodies 8 as a reference and realizes the distance adjustment by the simultaneous same-direction or back-direction movement of the two hook pulling bodies 8 relative to the reference. The distance adjusting mechanism and the depth adjusting mechanism are arranged independently, so that the two operations are free from non-interference when the depth and the distance are adjusted, and the two operations are convenient to correspond to the pull-up holes with different depths and distances. Distance scales and depth scales 18 are arranged on the pulling tool to clearly distinguish the position of the pulling hook head 804 after adjustment, so that comparison with the required size and continuous adjustment are facilitated.

Other embodiments of the extraction tool of the present invention: the driving mechanism can also adopt a linear reciprocating mechanism which is assembled on the support frame in an up-and-down moving way, if the driving mechanism adopts a driving rod which can slide up and down on the support frame, and the corresponding output end is any part on the driving rod, the structure of the synchronous transmission mechanism can be unchanged at the moment, the locking structure can still be positioned on the driving mechanism, and also can be positioned on the synchronous transmission mechanism and/or a pulling part, if the locking structure is positioned on the driving mechanism, the locking structure can be a nut which is similar to an adjusting nut in the depth adjusting mechanism and a spring which is matched with the nut, or two nuts which are connected on the driving rod and are respectively positioned at the two ends of a through hole on the support; if the locking structure is on the timing mechanism and/or the pulling member, the locking structure may be a screw or bolt similar to a dowel pin between the leg and the support, or a ratchet and pawl structure. The driving mechanism can also be a structure which rotates forwards and backwards to reciprocate, such as a gear, a cam and the like, and the corresponding synchronous transmission mechanism is adjusted adaptively, for example, when the driving mechanism adopts the gear, the synchronous transmission mechanism can adopt a rack, and the racks of the two synchronous transmission mechanisms are respectively arranged at the two opposite sides of the gear; when the driving mechanism adopts a cam, the cam is provided with two convex points which are oppositely convex, and the two corresponding synchronous transmission mechanisms are connecting rods which are matched with different convex points.

Claims

1. The pulling tool comprises a support frame, a handle and two pulling parts which are assembled on the support frame in a left-right moving mode, wherein each pulling part comprises a pulling hook extending up and down, and the pulling tool is characterized by also comprising a driving mechanism of which the output end outputs forward and reverse linear reciprocating motion or forward and reverse rotary reciprocating motion, and two synchronous transmission mechanisms which are connected between the output end of the driving mechanism and the two pulling parts in a transmission mode and are used for converting the forward and reverse motion of the output end into synchronous opposite motion and synchronous opposite motion of the two pulling parts, at least one of the driving mechanism, the synchronous transmission mechanism and the pulling parts is provided with a locking structure for locking the left position and the right position of the two pulling parts, the two pulling parts are respectively connected on the handle through a guide structure, and the guide structure comprises a groove-shaped or hole-shaped channel part extending left and right and a block-shaped or rod-shaped insertion part matched with the channel part, the insertion part is guided to move along the left and right direction and inserted in the channel part, the channel part is arranged on the handle, the insertion part is arranged on the pulling part, and the channel part and the insertion part are in blocking fit in the up and down direction; the pulling hook comprises a moving sleeve which is assembled on the support frame in a guiding mode along the left-right direction, the moving sleeve and the support frame are in limit fit in the up-down direction, a pulling hook body penetrates through the moving sleeve in the up-down direction in the guiding mode, an adjusting nut capable of moving up and down relative to the pulling hook body is connected to the pulling hook body in a threaded mode, and a stop surface which is limited and stopped below the adjusting nut is arranged on the moving sleeve; the handle is located between the hook bodies of the two pulling hooks, the handle and the hook bodies are in limit fit in the up-down direction, avoidance openings used for avoiding connection structures between the handle and the hook bodies are arranged on opposite sides of the two moving sleeves of the two pulling hooks, and the avoidance openings extend up and down on the pipe walls of the moving sleeves.

2. The extraction tool according to claim 1, wherein the output end of the drive mechanism outputs a straight reciprocating motion in a forward and reverse direction, and the two synchronous drives each comprise a linkage mechanism connected between the output end of the drive mechanism and the corresponding extraction member.

3. The extraction tool according to claim 2, wherein the driving mechanism comprises a screw rod rotatably mounted on the support frame about an axis extending vertically and a nut connected to the screw rod, the output end of the driving mechanism is the nut, and the driving mechanism is provided with a locking structure which is a thread fit structure between the screw rod and the nut.

4. The extraction tool according to claim 1, wherein there are more than two of said guide means between each extraction member and the handle, the channel portions of each guide means being arranged parallel to each other.

5. The extraction tool according to claim 1, wherein a spring is connected to the extraction hook body and/or the adjusting nut for pressing the extraction hook body downwards against the stop surface.

6. The extraction tool according to any one of claims 1 to 4, wherein the support frame comprises a support base extending in the left-right direction and legs on opposite sides of the two extraction members in the left-right direction, the legs are movably mounted on the support base in the left-right direction, and the legs are supported below the support base.