CN113746022A

CN113746022A - Pre-adjusting device for shearing stroke of ratchet type cable shear

Info

Publication number: CN113746022A
Application number: CN202111302901.2A
Authority: CN
Inventors: 邓全巧; 倪琪琪; 许凤全
Original assignee: Xuzhou Feiyu Machinery Technology Co ltd
Current assignee: Xuzhou Feiyu Machinery Technology Co ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2021-12-03
Anticipated expiration: 2041-11-05
Also published as: CN113746022B

Abstract

The invention discloses a pre-adjusting device for a shearing stroke of a ratchet wheel type cable shear, relates to the technical field of cable shearing tools, and solves the problems that the existing cable tool needs to be additionally manually reset to open a shearing assembly for reuse after the shearing operation is finished, and the operation is troublesome and laborious and inconvenient; the pre-adjusting device for the shearing stroke of the ratchet type cable shear comprises a bracket; the support is integrally composed of a left T-shaped supporting part and a right T-shaped supporting part and two cross brace connecting rods which are symmetrically welded between the top end sections of the two T-shaped supporting parts, wherein the T-shaped supporting part is composed of two vertical brace supporting plates and a vertical brace bottom plate which are welded together, and two vertical brace positioning shafts are symmetrically welded in the space between the left vertical brace supporting plate and the right vertical brace supporting plate on the two T-shaped supporting parts. The handle bar has a longer force arm, is more labor-saving in operation and shearing compared with the traditional shearing mechanism which is held by hands to exert force, can be driven by foot-operated force when necessary, and is particularly used for shearing large cables.

Description

Pre-adjusting device for shearing stroke of ratchet type cable shear

Technical Field

The invention relates to the technical field of cable shearing tools, in particular to a pre-adjusting device for a shearing stroke of a ratchet wheel type cable shear.

Background

When wiring or wiring the cable conductor, mostly need to cut off the cable, this just needs to use a ratchet formula cable and cuts, and need supporting preconditioning structure of cutting the stroke for high-efficient shearing.

The existing cable tool mostly adopts a hand to hold the operation to exert force, the force arm of the hand-held clamp handle is short, the manual auxiliary force application operation of feet is difficult and inconvenient to use, the large-diameter cable cannot be well sheared, in addition, the shearing assembly is opened by additional manual reset after the shearing operation is completed, so that the cable tool is used again, and the operation is troublesome and inconvenient.

Disclosure of Invention

The invention aims to provide a pre-adjusting device for the shearing stroke of a ratchet wheel type cable shear, which aims to solve the problems that after the shearing operation is finished, the shearing assembly is required to be reset manually to be opened for reuse, and the operation is troublesome and inconvenient.

In order to achieve the purpose, the invention provides the following technical scheme: a pre-adjusting device for the shearing stroke of a ratchet type cable shear comprises a bracket; the support comprises vertical support positioning shafts, the whole support is composed of a left T-shaped supporting part and a right T-shaped supporting part and two cross support connecting rods symmetrically welded between the top end sections of the two T-shaped supporting parts, the T-shaped supporting part is composed of two vertical support supporting plates and a vertical support bottom plate which are welded together, two vertical support positioning shafts are symmetrically welded in the space between the left vertical support supporting plate and the right vertical support supporting plate on the two T-shaped supporting parts, and a first driving strip frame is slidably mounted on the two vertical support positioning shafts; the support also comprises a longitudinal support positioning shaft, mounting shaft levers and vertical shaft levers, wherein one longitudinal support positioning shaft is welded at the bottom of the middle section of each transverse support connecting rod of the support in a hanging and supporting mode, two shearing plates are rotatably mounted on the longitudinal support positioning shaft in a crossed and crossed mode, one mounting shaft lever is welded and supported at the top end of the middle section of each transverse support connecting rod on the rear side of the support, two vertical shaft levers are welded at the top end of the rear half section of each mounting shaft lever at intervals, and one positioning part is slidably sleeved on each vertical shaft lever through spring pushing; an L-shaped handle rod is rotatably arranged on the middle section of the cross brace connecting rod at the rear side of the bracket; the support also comprises a cross brace bracket, wherein one cross brace bracket is welded between the lower half parts of the left and right T-shaped supporting parts of the support, the whole cross brace bracket is formed by welding a left longitudinal plate and a right longitudinal plate and two cross brace brackets welded between the two longitudinal plates at intervals, and the lower half sections of the two cut plates are arranged between the two cross brace brackets in a swinging manner; the bracket also comprises a driven gear, the front half section of the mounting shaft lever is rotatably provided with a driven gear, and the circumferential outer ring of the driven gear is supported and welded with a shifting shaft; the first driving strip frame comprises a second driving strip frame, a second driving strip frame is welded and hung at the bottom of the first driving strip frame, a shifting shaft on the driven gear is correspondingly matched with the second driving strip frame in an inserting manner, and the shifting shaft driven gear can rotate forward and backward to push the second driving strip frame and the first driving strip frame to slide up and down to provide a driving force for cross shearing for two shearing plates; the first driving strip frame comprises Z-shaped slide bars, two Z-shaped slide bars are symmetrically welded at the left end and the right end of the first driving strip frame, the tail ends of the two Z-shaped slide bars are correspondingly matched with the two vertical support positioning shafts in a sliding manner through spring pushing, and springs on the two vertical support positioning shafts can push the first driving strip frame to slide downwards so as to reset and open the two shear plate backswing; the plate shearing machine comprises stress shafts, two bending plates which are supported in opposite directions are welded at the top ends of the two plate shearing machines, one stress shaft is welded at the head ends of the two bending plates in a supporting mode, the two stress shafts are correspondingly matched with a first driving strip frame in an inserting mode, and the first driving strip frame can slide up and down to drive the two plate shearing machines to synchronously cross and swing to shear cables through the two stress shafts; the handle rod comprises a positioning circular plate, and the positioning circular plate is welded and fixed on the bent section at the head end of the handle rod; the head end of the handle rod is internally hollowed out, two vertical support short shafts are symmetrically welded in the head end of the bent section, and the T-shaped plug-in is sleeved on the two vertical support short shafts in a sliding mode through spring pushing; the handlebar comprises a force transmission shaft sleeve, the positioning circular plate is rotatably sleeved with the force transmission shaft sleeve, and a circle of tooth sheets are arranged on the inner wall of the force transmission shaft sleeve in a surrounding manner; the center of the force transmission shaft sleeve is welded with a rotating shaft towards the driven gear, the rotating shaft is correspondingly matched with the rear cross brace connecting rod of the bracket in a penetrating manner, the head end of the rotating shaft is welded with a driving gear, and the driving gear is in meshing transmission with the driven gear; the positioning part comprises a T-shaped stress plate, the positioning part is composed of a main body sliding block and two vertical support inserting plates which are symmetrically welded at the bottom of the head end of the main body sliding block, the bottom sections of the two vertical support inserting plates are in an oblique-section structure, the two vertical support inserting plates are correspondingly matched with the driven gear in an inserting mode, the head end of the main body sliding block is further welded with the T-shaped stress plate downwards, the positioning part can carry out real-time inserting and positioning on the driven gear through the two vertical support inserting plates on the positioning part, and the phenomenon that the driven gear rotates and becomes loose during shearing operation to cause two shearing plate unloading forces to influence the smooth implementation of the shearing operation is avoided; the vertical support section of the T-shaped plug-in passes through the bending section of the handle rod and protrudes upwards, the top end of the vertical support section of the T-shaped plug-in is of an oblique section structure, and the oblique section part of the vertical support section of the T-shaped plug-in is correspondingly matched with a circle of tooth sheets inside the force transmission shaft sleeve in an inserted mode.

Compared with the prior art, the invention has the beneficial effects that: 1. the cross brace bracket can brace and block the cable, so that the cable is prevented from sliding downwards and separating from a shearing opening by downward jacking displacement of shearing force of two shearing plates in the shearing process, and normal implementation of shearing operation is ensured; 2. the circle of the tooth sheet has the function of driving torque by matching with the T-shaped plug-in unit, and can also stop and limit the positioning circular plate in the force transmission shaft sleeve, so that the handle rod is ensured to be rotationally connected with the force transmission shaft sleeve; 3. the driven gear can be rotationally adjusted by lifting the positioning part before the shearing operation is started, the expansion amplitude of the two shearing plates, namely the shearing stroke, can be adjusted in advance, the shearing of thinner cables can be dealt with accordingly, unnecessary time waste caused by the large opening and closing stroke of the two shearing plates can be avoided, the two shearing plates are driven to be closed and tightly contacted with the cables, and the use is flexible and the shearing efficiency can be improved; 4. when the shearing operation is about to be finished, the shifting shaft of the driven gear rotates to ascend and is abutted and contacted with the T-shaped stress plate, the T-shaped stress plate is pushed upwards to be pulled out, the driven gear is not positioned, at the moment, the springs on the two vertical support positioning shafts can automatically push the first driving strip frame to slide downwards, so that the two shearing plates swing back and open to prepare for re-shearing, the trouble of additionally manually resetting and unfolding the two shearing plates is omitted, and the use is convenient, labor-saving and rapid;

5. the handle bar has a longer force arm, is more labor-saving in operation and shearing compared with the traditional shearing mechanism which is held by hands to exert force, can be driven by foot-operated force when necessary, and is particularly used for shearing large cables.

Drawings

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is a schematic diagram of the front three-dimensional structure of the present invention; FIG. 3 is a schematic bottom three-dimensional structure of the present invention; FIG. 4 is a schematic view of the installation positions of two vertical support positioning shafts according to the present invention; FIG. 5 is a schematic view of a stent structure according to the present invention; FIG. 6 is a schematic view of the cross installation of two shearing plates according to the present invention; FIG. 7 is a schematic view of a first driving strip frame according to the present invention; FIG. 8 is a schematic view of the positioning portion of the present invention being slidably mounted; FIG. 9 is a schematic view of the internal structure of the force transmitting sleeve of the present invention; FIG. 10 is a schematic view of the T-shaped insert mounting location of the present invention; FIG. 11 is a schematic view of a positioning portion of the present invention;

in the drawings, the corresponding relationship between the component names and the reference numbers is as follows: 1. a support; 101. a vertical supporting positioning shaft; 102. longitudinally supporting a positioning shaft; 103. installing a shaft lever; 104. a cross brace bracket; 105. a vertical shaft lever; 106. a driven gear; 2. a first drive bar frame; 201. a second driving bar frame; 202. a Z-shaped sliding rod; 3. shearing a plate; 301. a force-bearing shaft; 4. a handle bar; 401. a force transmission shaft sleeve; 402. a driving gear; 403. positioning the circular plate; 404. a T-shaped plug-in; 5. a positioning part; 501. t-shaped stress plate.

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.

Referring to fig. 1 to 8, according to a first embodiment of the present invention: a pre-adjusting device for the shearing stroke of a ratchet type cable shear comprises a bracket 1; the support 1 comprises vertical support positioning shafts 101, the support 1 integrally comprises a left T-shaped supporting part and a right T-shaped supporting part and two cross support connecting rods symmetrically welded between the top end sections of the two T-shaped supporting parts, the T-shaped supporting part is formed by welding two vertical support supporting plates and a vertical support bottom plate together, two vertical support positioning shafts 101 are symmetrically welded in the space between the left vertical support supporting plate and the right vertical support supporting plate on the two T-shaped supporting parts, and a first driving strip frame 2 is slidably mounted on the two vertical support positioning shafts 101; the bracket 1 further comprises a driven gear 106, the front half section of the mounting shaft rod 103 is rotatably provided with one driven gear 106, and the circumferential outer ring of the driven gear 106 is supported and welded with one poking shaft; the support 1 further comprises a longitudinal support positioning shaft 102, an installation shaft lever 103 and a vertical shaft lever 105, the bottom of the middle section of two cross support connecting rods of the support 1 is hung and welded with the longitudinal support positioning shaft 102, two shearing plates 3 are alternately and rotatably installed on the longitudinal support positioning shaft 102, the top end of the middle section of the cross support connecting rod at the rear side of the support 1 is welded and supported with the installation shaft lever 103, the top end of the rear half section of the installation shaft lever 103 is welded with the two vertical shaft levers 105 at intervals, and the two vertical shaft levers 105 are slidably sleeved with a positioning part 5 through spring pushing; the first driving strip frame 2 comprises a second driving strip frame 201, the bottom of the first driving strip frame 2 is welded with the second driving strip frame 201 in a hanging manner, and a shifting shaft on the driven gear 106 is correspondingly matched with the second driving strip frame 201 in an inserting manner; the first driving strip frame 2 comprises Z-shaped slide bars 202, two Z-shaped slide bars 202 are symmetrically welded at the left end and the right end of the first driving strip frame 2, and the tail ends of the two Z-shaped slide bars 202 are correspondingly in sliding fit with the two vertical support positioning shafts 101 through spring pushing; the plate shearing machine 3 comprises stress shafts 301, two turning plates which are supported in opposite directions are welded at the top ends of the two plate shearing machines 3, the stress shafts 301 are welded at the head ends of the two turning plates in a supporting mode, and the two stress shafts 301 are correspondingly matched with the first driving strip frame 2 in an inserting mode; an L-shaped handle bar 4 is rotatably arranged on the middle section of the cross-brace connecting rod at the rear side of the bracket 1.

Further, the support 1 further comprises a cross brace bracket 104, the cross brace bracket 104 is welded between the lower half portions of the left and right T-shaped supporting portions of the support 1, the cross brace bracket 104 is integrally formed by welding a left longitudinal plate and a right longitudinal plate and two cross brace supporting plates welded between the two longitudinal plates at intervals, the lower half portions of the two shearing plates 3 are arranged between the two cross brace supporting plates in a swinging mode, the cross brace bracket 104 can support and block cables, the cables are prevented from sliding and separating from a shearing opening due to downward jacking displacement of the shearing forces of the two shearing plates 3 in the shearing process, and normal implementation of shearing operation is guaranteed.

Further, the positioning part 5 comprises a T-shaped stress plate 501, the positioning part 5 is composed of a main body slider and two vertical support insertion plates symmetrically welded at the bottom of the head end of the main body slider, wherein the bottom sections of the two vertical support insertion plates are in an oblique cross section structure, the two vertical support insertion plates are correspondingly matched with the driven gear 106 in an inserting manner, the head end of the main body slider is further welded with the T-shaped stress plate 501 downwards, the driven gear 106 can be rotationally adjusted by lifting the positioning part 5 before the shearing operation starts, the expansion amplitude, namely the shearing stroke, of the two cut plates 3 is pre-adjusted, the shearing of thinner cables is correspondingly dealt with, unnecessary time caused by the large opening and closing stroke of the two cut plates 3 is avoided, the two cut plates 3 are driven to be closed and tightly contacted with the cables, the use is flexible, the shearing efficiency is improved, in addition, when the shearing operation is about to finish, the shifting shaft of the driven gear 106 can rotate to rise to be abutted and contacted with the T-shaped stress plate 501, the T-shaped stress plate 501 is pushed upwards to be pulled out, the driven gear 106 is not positioned, at the moment, the springs on the two vertical support positioning shafts 101 can automatically push the first driving strip frame 2 to slide downwards, the two shearing plates 3 swing back to be reset and opened, preparation is made for secondary shearing, the trouble of resetting and unfolding the two shearing plates 3 through additional manual operation is omitted, and the use is convenient, labor-saving and rapid.

Referring to fig. 9, the second embodiment of the present invention: a pre-adjusting device for the shearing stroke of a ratchet wheel type cable shear comprises a handle rod 4, wherein the handle rod 4 comprises a force transmission shaft sleeve 401, a position transmission shaft sleeve 401 is sleeved on a positioning circular plate 403 in a rotating mode, a circle of tooth sheets are arranged on the inner wall of the force transmission shaft sleeve 401 in a surrounding mode, the circle of tooth sheets can block the positioning circular plate 403 to be limited in the force transmission shaft sleeve 401 except for the function of carrying out transmission torque in cooperation with a T-shaped plug-in 404, and the handle rod 4 is enabled to be connected with the force transmission shaft sleeve 401 in a rotating mode; the center of the force transmission shaft sleeve 401 is welded with a rotating shaft towards the driven gear 106, the rotating shaft is correspondingly matched with the rear cross brace connecting rod of the support 1 in a penetrating mode, the head end of the rotating shaft is welded with the driving gear 402, the driving gear 402 is in meshed transmission with the driven gear 106, the handle rod 4 can swing up and down to drive the driven gear 106 to rotate in a single direction and provide cross shearing driving force for the two shearing plates 3.

Referring to fig. 10 to 11, a third embodiment of the present invention is provided: a pre-adjusting device for the shearing stroke of a ratchet wheel type cable shear comprises a handle rod 4, wherein the handle rod 4 comprises a positioning circular plate 403, and the positioning circular plate 403 is fixedly welded on a bending section at the head end of the handle rod 4; the T-shaped plug-in 404 is characterized in that the inside of a folding section at the head end of the rod 4 is hollowed out, two vertical support short shafts are symmetrically welded in the head end of the folding section, the T-shaped plug-in 404 is sleeved on the two vertical support short shafts in a sliding mode through a spring jacking, and the T-shaped plug-in 404 and a circle of tooth sheets on the force transmission shaft sleeve 401 form a ratchet mechanism together, so that the driving gear 402 and the driven gear 106 can be driven by the rod 4 to swing up and down conveniently through the ratchet mechanism; the vertical support section of the T-shaped plug-in 404 penetrates through the bent section of the handle rod 4 and protrudes upwards, the top end of the vertical support section of the T-shaped plug-in 404 is of an oblique section structure, and the oblique section of the vertical support section of the T-shaped plug-in 404 is correspondingly matched with a circle of tooth sheets inside the force transmission shaft sleeve 401 in an inserted mode.

The working principle is as follows: the T-shaped insert 404 together with a ring of teeth on the force transmission sleeve 401 form a ratchet mechanism, through the ratchet mechanism, the handle 4 is driven by hand to swing up and down to drive the driving gear 402 and the driven gear 106, the second driving strip frame 201 and the first driving strip frame 2 can be pushed to slide up and down by the forward and backward rotation of the poke shaft driven gear 106, through the two stress shafts 301, the first driving strip frame 2 can slide up and down to drive the two shearing plates 3 to synchronously and crossly swing to shear the cable, the dial shaft of the driven gear 106 is rotated up to come into abutting contact with the T-shaped force receiving plate 501 when the cutting work is about to end, the T-shaped stress plate 501 is pushed upwards to be pulled out, the driven gear 106 is not positioned, at the moment, the springs on the two vertical support positioning shafts 101 can automatically push the first driving strip frame 2 to slide downwards, the two shearing plates 3 swing back to be opened, and preparation is made for secondary shearing; before the shearing operation is started, the positioning part 5 can be lifted up to rotationally adjust the driven gear 106, so that the unfolding amplitude, namely the shearing stroke, of the two shearing plates 3 can be adjusted in advance, and accordingly, the shearing of thinner cables can be realized.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a preconditioning device of ratchet formula cable cutter shearing stroke which characterized in that: a pre-adjusting device for the shearing stroke of a ratchet type cable shear comprises a bracket (1); the support (1) comprises vertical support positioning shafts (101), the support (1) integrally comprises a left T-shaped supporting part and a right T-shaped supporting part and two cross support connecting rods symmetrically welded between the top end sections of the two T-shaped supporting parts, the T-shaped supporting part is formed by welding two vertical support plates and a vertical support bottom plate together, two vertical support positioning shafts (101) are symmetrically welded in the space between the left vertical support plate and the right vertical support plate on the two T-shaped supporting parts, and a first driving strip frame (2) is slidably mounted on the two vertical support positioning shafts (101); the support (1) further comprises a longitudinal support positioning shaft (102), an installation shaft lever (103) and a vertical shaft lever (105), the bottom of the middle section of two cross support connecting rods of the support (1) is hung and welded with the longitudinal support positioning shaft (102), two shearing plates (3) are installed on the longitudinal support positioning shaft (102) in a crossed and rotating mode, the top end of the middle section of the cross support connecting rod at the rear side of the support (1) is welded and supported with the installation shaft lever (103), the top end of the rear half section of the installation shaft lever (103) is welded with the two vertical shaft levers (105) at intervals, and one positioning part (5) is sleeved on the two vertical shaft levers (105) in a sliding mode through spring pushing; and an L-shaped handle bar (4) is rotatably arranged on the middle section of the cross-brace connecting rod at the rear side of the bracket (1).

2. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 1 wherein: support (1) still includes stull bracket (104), the welding has a stull bracket (104) between the latter half of T shape supporting part about support (1), stull bracket (104) wholly by controlling two vertical boards and interval welding to weld jointly the constitution at two stull brackets between two vertical boards, and the second half section pendulum of two department cut board (3) changes and is located between two stull brackets.

3. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 1 wherein: the support (1) further comprises a driven gear (106), the driven gear (106) is rotatably mounted on the front half section of the mounting shaft rod (103), and a shifting shaft is supported and welded on the circumferential outer ring of the driven gear (106).

4. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 1 wherein: first drive strip frame (2) include second drive strip frame (201), the bottom welding of first drive strip frame (2) is hung and is propped there is a second drive strip frame (201), and the epaxial correspondence of dialling of driven gear (106) is pegged graft the cooperation with second drive strip frame (201).

5. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 1 wherein: the first driving strip frame (2) comprises Z-shaped sliding rods (202), the left end and the right end of the first driving strip frame (2) are symmetrically welded with the two Z-shaped sliding rods (202), and the tail ends of the two Z-shaped sliding rods (202) are correspondingly matched with the two vertical support positioning shafts (101) in a sliding mode through spring pushing.

6. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 1 wherein: the plate shearing machine (3) comprises stress shafts (301), two turning plates which are oppositely supported are welded at the top ends of the two plate shearing machines (3), the stress shafts (301) are welded at the head ends of the two turning plates in a supporting mode, and the two stress shafts (301) are correspondingly matched with the first driving strip frame (2) in an inserting mode.

7. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 1 wherein: the handle rod (4) comprises a positioning circular plate (403), and the positioning circular plate (403) is fixedly welded on the bent section at the head end of the handle rod (4); the head end of the handle rod (4) is bent, the inside of the bent section is hollowed out, two vertical support short shafts are symmetrically welded in the head end of the bent section, and the T-shaped plug-in piece (404) is sleeved on the two vertical support short shafts in a sliding mode through spring pushing.

8. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 7 wherein: the handlebar (4) comprises a force transmission shaft sleeve (401), the positioning circular plate (403) is rotatably sleeved with the force transmission shaft sleeve (401), and a circle of tooth sheets is arranged on the inner wall of the force transmission shaft sleeve (401) in a surrounding manner; the center of the force transmission shaft sleeve (401) is welded with a rotating shaft towards the driven gear (106), the rotating shaft is correspondingly matched with a rear side cross brace connecting rod of the support (1) in a penetrating mode, the head end of the rotating shaft is welded with a driving gear (402), and the driving gear (402) is in meshing transmission with the driven gear (106).

9. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 1 wherein: location portion (5) include T shape atress board (501), location portion (5) are by main part slider and symmetric welding in two places erects to prop the picture peg and constitute jointly in main part slider head end bottom, and wherein the bottom section of two places erects to prop the picture peg all is the diagonal structure, and two places erects to prop the picture peg and correspond and driven gear (106) cooperation of pegging graft, and the head end of main part slider still has a T shape atress board (501) of welding downwards.

10. A ratcheting cable shear stroke preconditioning apparatus as defined in claim 8, wherein: the vertical support section of the T-shaped plug-in (404) penetrates through the bending section of the handle rod (4) to protrude upwards, the top end of the vertical support section of the T-shaped plug-in (404) is of an oblique section structure, and the oblique section of the vertical support section of the T-shaped plug-in (404) is correspondingly matched with a circle of tooth sheets inside the force transmission shaft sleeve (401) in an inserted connection mode.