WO2014134848A1 - 多用棘爪管钳 - Google Patents

多用棘爪管钳 Download PDF

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Publication number
WO2014134848A1
WO2014134848A1 PCT/CN2013/073312 CN2013073312W WO2014134848A1 WO 2014134848 A1 WO2014134848 A1 WO 2014134848A1 CN 2013073312 W CN2013073312 W CN 2013073312W WO 2014134848 A1 WO2014134848 A1 WO 2014134848A1
Authority
WO
WIPO (PCT)
Prior art keywords
tenon
tooth surface
groove
screw
pipe wrench
Prior art date
Application number
PCT/CN2013/073312
Other languages
English (en)
French (fr)
Inventor
蒋章美
Original Assignee
Jiang Zhangmei
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiang Zhangmei filed Critical Jiang Zhangmei
Priority to AU2013292895A priority Critical patent/AU2013292895A1/en
Priority to US14/347,019 priority patent/US20150360350A1/en
Publication of WO2014134848A1 publication Critical patent/WO2014134848A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/50—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes
    • B25B13/5008—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects
    • B25B13/5016—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe
    • B25B13/5025—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe using a pipe wrench type tool
    • B25B13/5041—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes for operating on pipes or cylindrical objects by externally gripping the pipe using a pipe wrench type tool with movable or adjustable jaws
    • B25B13/5058—Linearly moving or adjustable, e.g. with an additional small tilting or rocking movement

Definitions

  • the present invention relates to a pipe wrench, and more particularly to a multi-purpose pawl pipe wrench. Background technique
  • Pawl wrenches are generally used to tighten or loosen various nuts, bolts, threaded water pipes or other shaped workpieces.
  • a Chinese patent publication entitled “CN1353032A” is entitled “Multiple Fast Pliers Wrench”.
  • Wrench the wrench is composed of a handle, a hook-shaped wrench and a spring fixing structure, the head of which is semi-circular, and has a slot under the head to accommodate the rear of the hook-shaped wrench inserted into the slot, and is made of a pin
  • the pin fixes the rear portion of the hook-shaped wrench in the strip-shaped notch;
  • the spring fixing structure is mainly composed of a spring and a spring fixing pin: the spring fixing pin traverses the strip-shaped notch, and becomes a fixing of one end of the spring The fulcrum, the other end of the spring penetrates the insertion hole portion of the hook-shaped wrench to form another fulcrum, and the abdomen, the back and the semi-circular head of the shank have anti-slip teeth.
  • the wrench relies on the tooth surface of the handle head with the anti-slip tooth surface to cooperate with the tooth surface of the hook-shaped wrench to clamp the workpiece to prevent sliding.
  • the semi-circular portion of the handle body has a non-slip tooth portion and a handle body and a hook-shaped wrench.
  • the tooth surface of the mouth is inseparable from the entire hook-shaped wrench.
  • This kind of wrench only relies on two tooth faces to clamp the workpiece during work, if the shape angle of the workpiece The degree is the same as the angle of the wrench jaw. This type of wrench can achieve good results, but if the angle is different, such as a pipe, clamping with this wrench is very unreliable.
  • the restoring force of the wrench hook-shaped opening is realized by a torsion spring.
  • the two arms of the torsion spring are staggered, not in a plane, and the spring deformation generates tension on the one hand to cause the hook-shaped wrench to rotate and reset, but At the same time, the hook-shaped wrench is reset when it is not strong, so that the side wall of the assembly groove is scraped when it is reset, and the phenomenon of jamming and resetting has occurred during the actual use.
  • the front cross section of the wrench hook-shaped wrench is rectangular. In the large-size wrench, the hook-shaped wrench is heavy and the reset is not working. Summary of the invention
  • the object of the present invention is to provide a multi-purpose pawl pipe wrench which is reasonable in design, simple in structure, long in service life, low in manufacturing cost, firm in clamping, light in weight, good in strength, wide in function, fast and reliable in operation.
  • the present invention provides a multi-purpose pawl pipe wrench, comprising a handle body, an upper jaw clamp, a pin shaft and a torsion spring, wherein the handle body is provided with a fitting groove, and the upper jaw clamp is hinged to the handle through the pin shaft
  • the torsion spring is disposed in the assembly groove, a driving end of the torsion spring is disposed on the upper jaw, and the other end of the torsion spring is disposed on the mounting groove, and further includes a curved tooth surface insert and an upper tooth a curved insert surface, the curved tooth surface insert includes a curved tooth surface and a lower jaw, the handle body head is provided with a lower jaw groove adapted to the lower jaw, and is matched by the lower jaw and the lower jaw
  • the curved tooth surface insert is fixed on the handle body;
  • the upper flank insert includes an upper flank surface and an upper boring head
  • the upper cymbal clip is provided with an upper boring groove adapted to the upper boring head, and the upper flank surface is fixed by the cooperation of the upper boring groove and the upper boring head.
  • On the upper jaw On the upper jaw.
  • the lower boring head is disposed at a middle portion of the rear end of the curved tooth surface, and the step of the lower boring head and the curved tooth surface is excessively stepped, the lower boring head is a straight boring head having a rectangular cross section, and the lower boring groove is a cross section.
  • the step surface at the junction of the curved tooth surface and the lower boring head is pressed against the top surface of the lower sipe wall;
  • the upper boring head is disposed at a middle portion of the rear end of the upper flank surface, and the upper boring head and the upper flank surface are overlapped by a step, the upper boring head is a straight boring head having a rectangular cross section, and the upper boring groove is a straight long groove having a rectangular cross section.
  • the groove wall has sufficient thickness to meet the strength requirements.
  • the multi-purpose pawl pipe wrench further includes a first fixing device and a second fixing device.
  • the first fixing device When the lower jaw is inserted into the lower jaw, the first fixing device is fixed, and when the upper jaw is inserted into the upper groove, the second fixing device is used for fixing. .
  • the first fixing device is a retaining screw, and one side wall of the lower jaw is provided with a light hole, and the other side wall of the lower groove is provided with a first screw hole.
  • the through hole is provided on the hoe, and the detachment screw passes through the light hole and the through hole in sequence and cooperates with the first screw hole to fix the chin head on the shank.
  • the second fixing device comprises a set screw, and a fixing screw hole is arranged on one side wall of the upper groove, and the set screw fixes the upper head to the upper jaw by tightening the upper head through the tightening screw hole.
  • the upper tooth surface is a V-shaped tooth surface, and the open end of the V-shaped tooth surface faces the handle body.
  • the tooth angle of the curved tooth surface and the upper tooth surface is less than 90°, and the tooth angle of the curved tooth surface and the tooth angle of the upper tooth surface are inclined inward.
  • the multi-purpose pawl pipe wrench further includes a first depalletizing screw for pushing the lower jaw out of the lower jaw, and the handle body is provided with a second screw hole communicating with the lower jaw, the first depalletizing The screw is disposed in the second screw hole, and the end of the first tamper screw is abutted on the lower boring head.
  • the multi-purpose pawl pipe wrench further includes a second depalletizing screw for pushing the upper concealed head into the upper gutter, and the upper crotch clamp is provided with a third screw hole communicating with the upper gutter, the second depalletizing The screw is disposed in the third screw hole, and the end of the second tamper screw is abutted on the upper boring head.
  • the multi-purpose pawl pipe wrench further includes a limit pin
  • the torsion spring is a parallel double twist spring
  • the limit pin is disposed above the root of the lower arm of the flat double twist spring, and the spring lower arm is limited only Can move close to the bottom of the assembly groove.
  • the upper arm end of the flat double twist spring is connected to the rear arm of the upper clamp, and the rotation of the upper clamp causes the angle between the upper arm and the lower arm of the flat double twist spring to change, so that the spring tension generated always bears against the upper jaw clamp, so that the upper tooth surface of the upper jaw is embedded.
  • An opening is formed between the block and the curved toothed face insert of the handle body to form a pipe wrench to clamp the workpiece.
  • Figure 1 is a front elevational view of a multi-purpose pawl pipe wrench of the present invention
  • Figure 2 is a plan view of the multi-purpose pawl pipe wrench of the present invention.
  • Figure 3 is a cross-sectional view of the multi-purpose pawl pipe wrench of the present invention taken along line A-A;
  • Figure 4 is a cross-sectional view taken along line B-B of the multi-purpose pawl pipe wrench of the present invention
  • Figure 5 is a cross-sectional view taken along line C-C of the multi-purpose pawl pipe wrench of the present invention.
  • the present invention provides a multi-purpose pawl pipe wrench, comprising a handle body 1, a pin shaft 6, an upper jaw clamp 2 and a torsion spring 3, and the upper jaw clamp 2 passes through a pin shaft.
  • 6 is hinged on the handle body 1, the handle body 1 is provided with a fitting groove 11, the torsion spring 3 is disposed in the fitting groove 11, a driving end of the torsion spring 3 is disposed on the upper jaw 2, and the torsion spring 3 is The other end is disposed on the mounting groove, and the multi-purpose pawl pipe wrench further includes a curved tooth surface insert 4 and an upper tooth surface insert 5, wherein the curved tooth surface insert 4 includes curved teeth
  • the face 41 and the lower head 42 are provided with a lower jaw 12 adapted to the lower jaw 42.
  • the arcuate flank 4 is fixed by the cooperation of the lower jaw 42 and the lower jaw 12.
  • the upper flank insert 5 includes an upper flank surface 51 and an upper boring head 52.
  • the upper cymbal clamp 2 is provided with an upper mortise groove 21 adapted to the upper boring head 52, and cooperates with the upper boring head 52 through the upper boring groove 21.
  • the upper flank insert 5 is fixed to the upper jaw clamp 2.
  • the mounting groove 11 is disposed on the handle body 1 and is disposed to accommodate the rear arm of the upper jaw 2, and the torsion spring 3 is also disposed in the fitting groove 11, and the upper jaw 2 is hinged on the handle body 1, and the hinge point is In the present embodiment, it is disposed in the mounting groove 11, and the pin body 6 passes through the shaft hole of the handle body 1 and the upper jaw 2, and the handle body 1 and the pin shaft 6 are stationary, and the upper jaw clamp 2 is rotatable around the pin shaft 6. In the present embodiment, the upper jaw 2 is rotatable about the pin 6 by more than 90°.
  • the multi-purpose pawl pipe wrench of the new structure is inserted into the lower jaw 12 in the normal use, the upper jaw 52 is inserted into the upper jaw 21, and then the various teeth are realized by the cooperation of the curved tooth surface 41 and the upper tooth surface 51. Disassembly and assembly, after a period of use, that is, when the anti-slip teeth wear to lose the anti-slip function, the curved tooth surface insert 4 and the upper tooth surface insert 5 are extracted from the lower jaw 42 and the upper groove 21, and replaced. The new curved toothed insert 4 and the upper toothed insert 5 greatly enhance the service life of the multi-purpose pawl pipe wrench.
  • the lower boring head 42 is disposed at the middle of the rear end of the curved tooth surface 41, and the joint between the lower boring head 42 and the curved tooth surface 41 is excessively stepped, and the thickness of the lower boring groove 12 is
  • the lower jaw 12 is adapted in width, and the step surface is pressed against the top surface of the side wall of the lower jaw 12 during assembly.
  • the upper boring head 52 is disposed at the middle of the rear end of the upper flank 51, and the joint between the upper boring head 52 and the upper flank 51 is stepped excessively, and the thickness of the upper boring groove 21 is adapted to the width of the upper sipe 12 When the assembly is performed, the step surface is pressed against the top surface of the side wall of the upper groove 21.
  • the upper jaw groove 21 and the lower jaw groove 12 are straight long grooves, and the upper jaw groove 21 and the lower jaw groove 12 are both rectangular in cross section, and the groove walls are provided with sufficient thickness for use.
  • the upper head 52 and the bottom of the upper jaw 21 that is, the step surface of the upper tooth surface is in close contact with the top surface of the groove of the upper jaw 21
  • the hoe 42 and the bottom of the lower sipe 21 there is also a certain gap between the hoe 42 and the bottom of the lower sipe 21, and the step surface of the curved flank 41 is in close contact with the top surface of the groove of the lower sipe 12, so that the entire pipe wrench acts on the curved tooth when in use.
  • the force on the face 41 and the upper tooth surface 51 can all be pressed through the step surface
  • the upper boring head 52 and the upper boring head 21 and the lower boring head 42 and the lower boring groove 12 can be directly fixed by an interference fit, thereby achieving a tight fit between each other.
  • the skull 52 and the lower jaw 42 are pulled out.
  • the cooperation between the two can also be a transitional fit, and the transitional fit refers to a fit that may have a gap or an interference.
  • the multi-purpose pawl pipe wrench further includes a first fixing device 7 and a second portion, in order to fix the upper jaw 21 and the upper jaw 52 and the lower jaw 12 and the lower jaw 42 firmly.
  • the fixing device 8 is fixed by the first fixing device 7 when the lower jaw 42 is inserted into the lower jaw 12, and is fixed by the second fixing device 8 when the upper jaw 52 is inserted into the upper jaw 21.
  • the first fixing device 7 is a retaining screw, and one side wall of the lower jaw 12 is provided with a light hole, and the lower jaw 12 is further provided. a first screw hole is disposed on one side wall, and a through hole is disposed on the lower boring head 42.
  • the detachment screw sequentially passes through the light hole and the through hole and cooperates with the first screw hole to fix the lower boring head 42 to the handle body 1. .
  • the lower boring head 42 is firmly fixed in the lower boring groove 12, that is, the entire curved flank insert 4 is firmly fixed on the handle body 1, and of course, the detachment screw is used.
  • the specific form of the first fixing device 7 is not limited in the present invention.
  • the lower boring head 42 and the lower boring groove 12 may be fixed by other means, for example, by bolts and nuts, that is, The two side walls of the gutter 12 are disposed as optical holes, and the bolts are sequentially passed through a light hole, a through hole, another optical hole, and finally fixed to the handle body 1 with a nut.
  • pin fixing or the like can also be used.
  • the second fixing device 8 is a set screw, and a side wall of the upper jaw 21 is provided with a fixing screw hole when the upper head 52 is inserted into the upper groove 21
  • the set screw can be tightened by the tightening screw hole to prevent loosening.
  • the second positioning device can also adopt the technical solution of the first positioning device, which is not specifically limited in the present invention.
  • the upper tooth surface 51 is a V-shaped tooth surface, and the open end of the V-shaped tooth surface faces the handle body 1.
  • the curved tooth surface 41 is downwardly facing upward
  • the V-shaped tooth surface is facing downward
  • the angle of the V-shaped tooth surface apex angle is 120°, so the V-shaped tooth surface is actually two.
  • the tooth surface in different directions is opposite to the curved tooth surface.
  • the three tooth surfaces form the jaws for clamping the workpiece. Since three points can determine a circle, the workpiece can be effectively clamped in this way. . Pipes that cannot be clamped by traditional wrenches The workpiece, the new wrench can also be firmly clamped.
  • the curved tooth faces 41 and the teeth of the V-shaped tooth faces are inclined inwardly, and the tooth tip angle is less than 90.
  • the best anti-slip effect can be achieved.
  • the lower jaw 12 can be directly communicated with the fitting groove 11, so that the processing of the handle body 1 is convenient, and the structures of the lower jaw 12 and the lower jaw 12 are determined according to the specific shape of the handle body 1 and the upper jaw clamp 2.
  • the multi-purpose pawl pipe wrench further includes a first depalletizing screw 9 for pushing the lower jaw 42 out of the lower jaw 12, and the handle body 1 is provided with a lower portion.
  • the second screw hole communicating with the gutter 12 is disposed in the second screw hole, and the end of the first depallet screw 9 abuts against the lower boring head 42.
  • the multi-purpose pawl pipe wrench further includes a second decanting screw 10 for pushing the upper boring head 52 out of the upper boring groove 21, and the upper cymbal clamp 2 is provided with a third screw hole communicating with the upper sill groove 21,
  • the second deboarding screw 10 is disposed in the third screw hole, and the end of the second depalletizing screw 10 abuts against the upper head 52.
  • the upper boring head 52 and the lower boring head 42 can be easily removed by using two squeegee screws.
  • the first squeegee screw 9 is taken as an example.
  • the first smashing screw 9 is rotated internally.
  • the first decanting screw 9 pushes the lower boring head 42 out of the chin groove 12, and the user can conveniently remove the curved flank insert 4.
  • the multi-purpose pawl pipe wrench further includes a limit pin 31, the torsion spring 3 is a parallel double twist spring, and the limit pin 31 is disposed above the root of the lower arm of the flat double twist spring.
  • the upper arm of the parallel twisted spring described with reference to FIG. 1 , FIG. 2 and FIG. 5 is a double arm and is separated from each other.
  • the top ends of the arms are bent, and the bending direction is opposite to the inner side, and the bending angle is 90.
  • the upper arm 2 has a small through hole in the rear arm, the upper arm is inserted into the small through hole from both sides of the upper arm 2, and the two lower wires of the spring lower arm are connected together to form a connected arm, which is inserted under the pin 6
  • the lower arm is pressed against the bottom of the fitting groove 11 of the handle body 1, and the limiting pin 31 is disposed above the root of the lower arm, which limits the movement of the lower arm of the spring to the bottom surface of the fitting groove 11 of the handle body 1, and the rotation of the upper jaw clamp 2 drives the flat double twist
  • the angle between the upper arm and the lower arm of the spring changes, the spring tension always bears against the upper jaw clamp 2, so that it is reset, and the parallel-lined double-twist spring structure is symmetrical, so the mutual force cancels each other to zero, and only the tension of the two arms acts on the center line, Conducive to the smooth reset of the upper jaw 2 .
  • the arrangement of the flat-twisted torsion spring is not specifically limited in the present invention, and the main purpose is to provide a change in the angle between the upper arm and the lower arm of the flat-line twisted spring after the upper jaw clamp 2 is rotated, thereby generating a restoring force, and thus flat
  • the arrangement of the column twist springs can be various structures.
  • the upper arm of the parallel twisted spring is disposed on the upper jaw 2, which is consistent with the above structure, and the lower arm is directly fixed to the handle body 1
  • the handle body 1 is provided with a fixing hole, the bottom of the lower arm is directly fixed through the fixing hole, or the end of the lower arm is wound around the limit pin.
  • the flat double twist spring is reversely mounted.
  • the upper arm is bent in the direction of the pin axis, and is still disposed on the upper jaw.
  • the lower arm extends in the direction of the end of the handle, and the limit pin is still above the root of the lower arm.
  • the handle body 1 is provided with a fixed shaft, and the lower arm is wound around the fixed shaft.
  • the front end of the upper jaw 2 has a cross section of "T" shape, so that the entire upper jaw 2 is light in weight and has good bending resistance, and the upper jaw 2 is rotated flexibly and smoothly around the pin shaft 6 and further, the upper jaw
  • the rear wall of the clip 2 is designed to be curved so as to span the curved tooth surface, and the mounting groove 11 is inserted into the rear of the curved tooth surface to ensure that the curved tooth surface is intact, so that the multi-purpose pawl tube clamp is clamped at the maximum diameter.
  • the largest tooth surface clamps the pipe.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Abstract

一种多用棘爪管钳，包括柄体（1）、上颚夹（2）、销轴（6）、扭力弹簧（3）、弧形齿面嵌块（4）及上齿面嵌块（5），上颚夹（2）通过销轴（6）铰接在柄体（1）上，柄体（1）上设有装配槽（11），扭力弹簧（3）设置在装配槽（11）内，扭力弹簧（3）的一驱动端设置在上颚夹（2）上，另一端设置在装配槽（11）底，弧形齿面嵌块（4）包括弧形齿面（41）及下榫头（42），柄体（1）头部设置有下榫槽（12），通过下榫头（42）与下榫槽（12）的配合使弧形齿面嵌块（4）固定在柄体（1）上；上齿面嵌块（5）包括上齿面（51）及上榫头（52），上颚夹（2）上设置有上榫槽（21），通过上榫槽（21）与上榫头（52）的配合使上齿面嵌块（5）固定在上颚夹（2）上，柄体（1）及上颚夹（2）上的防滑齿可装卸可更换，整个钳口由三个不同方向的齿面夹紧管子，防止滑动，上颚夹（2）结构合理，重量轻，强度好，整个多用棘爪管钳性能好，制造成本低，使用寿命长，功能广泛。

Description

多用棘爪管甜
技术领域
本发明涉及一种管钳， 尤其是一种多用棘爪管钳。 背景技术
棘爪扳手一般用于拧紧或松开各种螺母、 螺栓、 螺纹连接的水管或其他异 型工件， 中国专利公开号为 "CN1353032A" 名称为 "多用快速棘爪扳手" 的发 明专利中公开了一种扳手， 该扳手由手柄、 勾状扳口和弹簧固定结构构成， 其 头部呈半圓状， 头部下方有一条状槽口， 以容纳插入槽口里的勾状扳口后部， 并由销釘将该勾状扳口后部固定在条状槽口内； 弹簧固定结构主要由弹簧和弹 簧固定销两个部分构成： 弹簧固定销横穿条状槽口， 成为弹簧一端足缠绕其上 的固定支点， 弹簧另一端足穿入勾状扳口的插入条孔部分形成另一支点， 扳口 头腹部、 背部和柄体半圓状头部均有防滑齿。
但是这种棘爪扳手在使用过程中暴露出诸多缺点， 其缺陷具体如下：
1、 该扳手依靠手柄头部的带防滑齿的齿面与勾状扳口的齿面配合来夹紧工 件防止滑动， 其柄体头部的半圓状带防滑齿部分与柄体及勾状扳口的齿面与整 个勾状扳口都是不可分开的整体， 这种结构存在两大缺点：
1 )对于使用者来说， 扳口头部腹侧带防滑齿部分与扳口头部是不可分开的 整体， 如果使用时间长， 防滑齿会渐渐磨损至最终失去了防滑的功能， 扳手就 得整把报废， 而此时的扳手绝大部分位置都是正常可用的， 损坏的只是防滑齿， 因此这种结构缺陷， 导致了因小失大， 缩短了扳手的使用寿命， 造成了极大的 浪费。
2 )对于生产者来说， 在生产制造中， 如果要提高扳口机械性能， 需要采用 优质材料， 而一体化的设计使得只能整把采用统一材料来制造管钳， 而除了位 于扳口的防滑齿需要优质材料外， 其他部分采用一般材料就能满足要求， 因此 一体化的棘爪扳手选用的材料成本大大增加。
2、 这种扳手在工作时仅仅依靠了两个齿面来夹紧工件， 如果工件的外形角 度与该扳手钳口角度相同， 这种扳手可以良好的实现目的， 但是如果角度不同， 如管子等， 采用这种扳手夹紧就很不可靠。
3、 这种扳手勾状扳口开口后复位力， 是通过一个扭力弹簧来实现的， 扭力 弹簧的两臂错开， 不在一个平面上， 弹簧变形一方面产生张力使勾状扳口旋转 复位， 但同时又产生勾状扳口复位时别劲， 使其复位时刮擦装配槽的侧壁， 实 际使用过程中曾发生过卡住不复位的现象。
4、 该扳手位于最小开口时， 勾状扳口的后部停靠在柄体头部半圓状齿面的 中间， 使半圓齿面后部中间部分变成条状槽口而失去防滑齿， 仅存留此槽口两 边狭窄的半圓弧齿面有防滑齿， 而此段半圓弧齿面正是夹紧最大直径工件的位 置， 它夹紧工件的齿面需要最大， 现却最小。
5、 该扳手勾状扳口前部横截面为矩形， 在大规格扳手中， 这种勾状扳口显 笨重， 复位不灵。 发明内容
本发明的目的在于提供一种设计合理、 结构筒单、 使用寿命长、 制造成本 低， 夹紧牢固、 重量轻、 强度好、 功能广泛、 工作快捷可靠的多用棘爪管钳。
为解决上述技术问题， 本发明提供一种多用棘爪管钳， 包括柄体、 上颚夹、 销轴及扭力弹簧， 所述柄体上开设有装配槽， 所述上颚夹通过销轴铰接在柄体 的装配槽上， 所述扭力弹簧设置在装配槽内， 扭力弹簧的一驱动端设置在上颚 夹上， 扭力弹簧的另一端设置在装配槽上， 还包括弧形齿面嵌块及上齿面嵌块， 所述弧形齿面嵌块包括弧形齿面及下榫头， 所述柄体头部设置有与下榫头相适 配的下榫槽， 通过下榫头与下榫槽的配合使弧形齿面嵌块固定在柄体上；
所述上齿面嵌块包括上齿面及上榫头， 所述上颚夹上设置有与上榫头相适 配的上榫槽， 通过上榫槽与上榫头的配合使上齿面嵌块固定在上颚夹上。
本发明改进有， 所述下榫头设置在弧形齿面后端中部， 下榫头与弧形齿面 连接处采用阶梯过度， 下榫头是横截面为矩形的直榫头， 下榫槽是横截面为矩 形的直向长槽， 当下榫头插入下榫槽时， 弧形齿面与下榫头连接处的台阶面压 紧在下榫槽壁的顶面上； 所述上榫头设置在上齿面后端中部， 上榫头与上齿面连接处采用阶梯过度， 上榫头是横截面为矩形的直榫头， 上榫槽是横截面是矩形的直向长槽， 当上榫 头插入上榫槽时， 上齿面与上榫头连接处的台阶面压紧在上榫槽槽壁的顶面上。
具体的， 槽壁有足够的厚度满足强度要求。
本发明改进有， 多用棘爪管钳还包括第一固定装置及第二固定装置， 当下 榫头插入下榫槽时采用第一固定装置固定， 当上榫头插入上榫槽时采用第二固 定装置固定。
本发明改进有， 所述第一固定装置为防脱螺釘， 所述下榫槽的一个侧壁上 设置有光孔， 所述下榫槽的另一个侧壁上设置有第一螺孔， 所述下榫头上设置 有通孔， 防脱螺釘依次穿过光孔及通孔并与第一螺孔配合将下榫头固定在柄体 上。
本发明改进有， 所述第二固定装置包括紧定螺釘， 上榫槽一个侧壁上设置 有紧定螺孔， 紧定螺釘通过紧定螺孔顶紧上榫头使上榫头固定在上颚夹上。
本发明改进有， 所述上齿面为 V型齿面， V型齿面的开口端朝向柄体。 本发明改进有， 所述弧形齿面与上齿面的齿角小于 90° , 所述弧形齿面的 齿角及上齿面的齿角向内倾斜设置。
本发明改进有， 多用棘爪管钳还包括将下榫头推出下榫槽的第一卸榫螺釘， 所述柄体上设置有与下榫槽相通的第二螺孔， 所述第一卸榫螺釘设置在第二螺 孔内， 第一卸榫螺釘的末端抵在下榫头上。
本发明改进有， 多用棘爪管钳还包括将上榫头推出上榫槽的第二卸榫螺釘， 所述上颚夹上设置有与上榫槽相通的第三螺孔， 所述第二卸榫螺釘设置在第三 螺孔内， 第二卸榫螺釘的末端抵在上榫头上。
本发明改进有， 多用棘爪管钳还包括限位销， 所述扭力弹簧为平列双扭弹 簧， 所述限位销设置在平列双扭弹簧下臂的根部上方， 限制弹簧下臂只能贴近 装配槽底移动。
平列双扭弹簧上臂端部连接上颚夹后臂， 上颚夹旋转带动平列双扭弹簧上 臂和下臂夹角变化， 因此产生的弹簧张力始终顶住上颚夹， 使上颚夹的上齿面 嵌块与柄体头部弧形齿面嵌块之间形成管钳夹紧工件的开口。 本发明的有益效果为： 新型结构的多用棘爪管钳， 柄体及上颚夹上的防滑 齿可装卸可更换， 对使用者而言， 钳口防滑齿磨损至不能再用时， 扳手不会报 废， 只要更换两个嵌块即可， 对于生产者而言， 要选择优质材料提高质量， 只 要对两个嵌块选择优质材料， 其余部分仍用普通材料， 就能达到目的， 整个钳 口由三个不同方向的齿面夹紧管子， 防止滑动， 而且上颚夹的结构合理， 重量 轻， 强度好， 新采用的平列双扭弹簧结构紧凑对称， 弹性好无别劲， 性能好。 整根多用棘爪管钳制造成本低， 使用寿命长， 功能广泛， 工作快速可靠。 附图说明
附图 1为本发明的多用棘爪管钳的主视图；
附图 2为本发明的多用棘爪管钳的俯视图；
附图 3为本发明的多用棘爪管钳的 A-A剖视图；
附图 4为本发明的多用棘爪管钳的 B-B剖视图；
附图 5为本发明的多用棘爪管钳的 C-C剖视图。
标号说明： 1-柄体； 11-装配槽； 12-下榫槽； 2-上颚夹； 21- 上榫槽； 3-扭力弹簧； 31-限位销； 4-弧形齿面嵌块； 41-弧形 齿面； 42-下榫头； 5-上齿面嵌块； 51-上齿面； 52-上榫头； 6- 销轴； 7-第一固定装置； 8-第二固定装置； 9-第一卸榫螺釘； 10- 第二卸榫螺釘。
具体实施方式
为详细说明本发明的技术内容、 构造特征、 所实现目的及效果， 以下结合 实施方式并配合附图详予说明。
请参阅图 1至附图 4, 附图所示本发明提供的一种多用棘爪管钳， 包括柄体 1、 销轴 6、 上颚夹 2及扭力弹簧 3 , 所述上颚夹 2通过销轴 6铰接在柄体 1上， 所述柄体 1上开设有装配槽 11 , 所述扭力弹簧 3设置在装配槽 11内， 扭力弹簧 3的一驱动端设置在上颚夹 2上，扭力弹簧 3的另一端设置在装配槽上， 多用棘 爪管钳还包括弧形齿面嵌块 4及上齿面嵌块 5 ,所述弧形齿面嵌块 4包括弧形齿 面 41及下榫头 42, 所述柄体 1头部设置有与下榫头 42相适配的下榫槽 12, 通 过下榫头 42与下榫槽 12的配合使弧形齿面嵌块 4固定在柄体 1上；
所述上齿面嵌块 5包括上齿面 51及上榫头 52,所述上颚夹 2上设置有与上 榫头 52相适配的上榫槽 21 , 通过上榫槽 21与上榫头 52的配合使上齿面嵌块 5 固定在上颚夹 2上。
具体的，装配槽 11设置在柄体 1上，设置的大小可以容置上颚夹 2的后臂， 而且扭力弹簧 3也设置在装配槽 11内， 上颚夹 2铰接在柄体 1上， 铰接点在本 实施例中设置在装配槽 11内， 通过销轴 6贯穿柄体 1及上颚夹 2的轴孔， 柄体 1与销轴 6是不动的， 上颚夹 2可绕销轴 6转动， 本实施例中上颚夹 2可绕销轴 6旋转大于 90° 。
新型结构的多用棘爪管钳在正常使用时， 下榫头 42插入下榫槽 12, 上榫头 52插入上榫槽 21 , 之后依靠弧形齿面 41与上齿面 51的配合实现各种工件的拆 装， 在使用一段时间后， 即当防滑齿磨损到失去防滑功能时， 将弧形齿面嵌块 4 及上齿面嵌块 5从下榫槽 42及上榫槽 21 内抽出， 并更换新的弧形齿面嵌块 4 及上齿面嵌块 5 , 大大提升了多用棘爪管钳的使用寿命。
本实施例中， 参照附图 3 , 所述下榫头 42设置在弧形齿面 41的后端中部， 下榫头 42与弧形齿面 41的连接处采用阶梯过度，下榫槽 12的厚度与下榫槽 12 宽度适配， 装配时台阶面压紧在下榫槽 12的侧壁顶面上。
参照附图 4, 所述上榫头 52设置在上齿面 51的后端中部， 上榫头 52与上 齿面 51的连接处采用阶梯过度， 上榫槽 21的厚度与上榫槽 12宽度适配， 装配 时台阶面压紧在上榫槽 21的侧壁顶面上。
上述两种装配方式中， 所述上榫槽 21和下榫槽 12均为直向长槽， 上榫槽 21与下榫槽 12的横截面均为矩形，槽壁均设置有足够厚度，用以保证抗弯强度， 进一步的， 在装配后， 上榫头 52与上榫槽 21底之间存在一定的间隙， 即上齿 面的台阶面紧贴在上榫槽 21槽壁顶面上， 下榫头 42与下榫槽 21槽底也存在一 定的间隙， 及弧形齿面 41的台阶面紧贴在下榫槽 12槽壁顶面上， 因此， 整个 管钳在使用时， 作用在弧形齿面 41及上齿面 51上的力能全部通过台阶面压在 本实施例中， 可以直接采用过盈配合互相固定上榫头 52与上榫槽 21及下 榫头 42与下榫槽 12, 实现了相互之间的紧配合， 当需要拆卸更换时， 通过道具 将上榫头 52及下榫头 42拔出。
当然， 两者之间的配合也可以是过渡配合， 过渡配合指可能具有间隙或过 盈的配合。
当两者采用过渡配合时， 为了使上榫槽 21与上榫头 52及下榫槽 12与下榫 头 42固定牢固， 本实施例中， 多用棘爪管钳还包括第一固定装置 7及第二固定 装置 8, 当下榫头 42插入下榫槽 12时采用第一固定装置 7固定， 当上榫头 52 插入上榫槽 21时采用第二固定装置 8固定。
一实施例中， 参照附图 1及附图 2, 所述第一固定装置 7为防脱螺釘， 所述 下榫槽 12的一个侧壁上设置有光孔， 所述下榫槽 12的另一个侧壁上设置有第 一螺孔， 所述下榫头 42上设置有通孔， 防脱螺釘依次穿过光孔及通孔并与第一 螺孔配合将下榫头 42固定在柄体 1上。
防脱螺釘通过螺纹配合固定在第一螺孔后， 下榫头 42牢固的固定在下榫槽 12内， 即整个弧形齿面嵌块 4牢固的固定在柄体 1上， 当然， 采用防脱螺釘只 是一种技术方案， 本发明中并不限制第一固定装置 7 的具体形式， 其他实施例 中，也可以采用其他方式固定下榫头 42与下榫槽 12,例如采用螺栓与螺母配合， 即下榫槽 12的两个侧壁上均设置为光孔， 螺栓依次穿过一光孔、 通孔、 另一光 孔并最终与螺母配合固定在柄体 1上， 当然也可以采用销固定等。
本实施例中， 参照附图 1及附图 2, 第二固定装置 8为紧定螺釘， 上榫槽 21的一个侧壁上设置有紧定螺孔， 当上榫头 52插入上榫槽 21时， 紧定螺釘通 过紧定螺孔顶紧上榫头 52, 以防松脱， 当然第二定位装置也可以采用上述第一 定位装置的技术方案， 本发明中并不做具体限制。
本实施例中， 所述上齿面 51为 V型齿面， V型齿面的开口端朝向柄体 1。 具体的， 本实施例中， 弧形齿面 41居下朝上， V型齿面居上朝下， V型齿 面顶角的夹角为 120° , 因此 V型齿面实际上是两个不同方向的齿面， 它与弧 形齿面上下相对， 三个齿面构成了钳口， 用于夹持工件， 由于三个点可以决定 一个圓， 因此采用这种方式能有效的夹紧工件。 如传统扳手无法夹紧的管子类 工件， 新型的扳手也能牢固的夹持。
本实施例中， 弧形齿面 41与 V形齿面的防滑齿的齿形向内倾斜， 并且齿尖 角小于 90。 ， 可以达到最佳的防滑效果， 此结构与其他结构配合时， 实现了外 力旋紧或松开螺纹连接件时， 即实施正向压力， 外力越大， 钳口对工件就夹的 越紧， 当实施反向外力时， 调整管钳的工作位置时， 就会自动松开， 使管钳轻 松到达新的工作位置， 实现连续工作。
下榫槽 12可以直接与装配槽 11相通， 使得柄体 1的加工方便， 根据柄体 1 及上颚夹 2的具体形状来确定下榫槽 12与下榫槽 12的结构。
本实施例中， 参照附图 1及附图 2, 所述多用棘爪管钳还包括将下榫头 42 推出下榫槽 12的第一卸榫螺釘 9,所述柄体 1上设置有与下榫槽 12相通的第二 螺孔， 所述第一卸榫螺釘 9设置在第二螺孔内， 第一卸榫螺釘 9的末端抵在下 榫头 42上。
同理， 所述多用棘爪管钳还包括将上榫头 52推出上榫槽 21的第二卸榫螺 釘 10, 所述上颚夹 2上设置有与上榫槽 21相通的第三螺孔， 所述第二卸榫螺釘 10设置在第三螺孔内， 第二卸榫螺釘 10的末端抵在上榫头 52上。
通过两个卸榫螺釘可方便的拆卸上榫头 52及下榫头 42, 具体的， 以第一卸 榫螺釘 9为例， 当需要拆卸下榫头 42时， 将第一卸榫螺釘 9往内旋， 第一卸榫 螺釘 9将下榫头 42推出下榫槽 12, 使用者可以方便的将弧形齿面嵌块 4拆下。
本实施例中， 多用棘爪管钳还包括限位销 31 , 所述扭力弹簧 3为平列双扭 弹簧， 所述限位销 31设置在平列双扭弹簧下臂的根部上方。
具体的， 参照附图 1、 附图 2及附图 5所述平列双扭弹簧的上臂是双臂， 并 彼此独立分开， 双臂顶端均有弯脚， 弯曲方向相对朝内侧， 弯曲角度 90° , 上 颚夹 2后臂设置有小通孔， 上臂从上颚夹 2后臂两侧插在其小通孔内， 弹簧下 臂两根钢丝连在一起成连体臂， 插在销轴 6下方， 下臂压在柄体 1装配槽 11的 底部， 限位销 31设置在下臂根部上方， 限制了弹簧下臂只能贴近柄体 1装配槽 11底面移动， 上颚夹 2旋转带动平列双扭弹簧上臂和下臂夹角变化， 弹簧张力 始终顶住上颚夹 2,使它复位，平列双扭弹簧结构对称，所以别劲相互抵消为零， 只有双臂张力合力作用在中心线上， 有利于上颚夹 2顺畅复位。 平列双扭弹簧的设置方式在本发明中并不做具体限制，主要是提供上颚夹 2 转动后带动平列双扭弹簧上臂和下臂之间的夹角变化， 从而产生回复力， 因此 平列双扭弹簧的设置可以为多种结构， 例如， 在一实施例中， 所述平列双扭弹 簧的上臂设置在上颚夹 2上， 与上述结构一致， 其下臂直接固定在柄体 1上， 例如柄体 1 上开设有固定孔， 下臂底部直接穿过固定孔固定， 或者下臂端部缠 绕在限位销上， 另一种方案中， 所述平列双扭弹簧反向安装， 此时上臂制成顺 销轴方向弯曲， 仍设置在上颚夹上， 下臂反向伸向柄体末端方向， 限位销仍在 下臂根部上方， 当上颚夹旋转时， 带动上臂推动弹簧储能圏向前移动， 上述结 构均可以实现上下臂夹角变化， 产生回复弹力。
柄体 1上设置有固定轴， 下臂绕设在固定轴上。
本实施例中， 所述上颚夹 2的前端的横截面为 "T" 型， 使整个上颚夹 2重 量轻， 抗弯曲性能好， 而且上颚夹 2绕销轴 6旋转灵活顺畅， 进一步的， 上颚 夹 2后壁设计成弧形， 使其跨过弧形齿面， 在弧型齿面后部插入装配槽 11 , 保 证弧形齿面完整无缺， 使多用棘爪管钳在夹持最大直径的管子时， 即钳口最大 开口时， 有最大的齿面夹紧管子。
以上所述仅为本发明的实施例， 并非因此限制本发明的专利范围， 凡是利 用本发明说明书及附图内容所作的等效结构或等效流程变换， 或直接或间接运 用在其他相关的技术领域， 均同理包括在本发明的专利保护范围内。

Claims

权 利 要 求 书
1、 一种多用棘爪管钳， 包括柄体、 上颚夹、 销轴及扭力弹簧， 所述柄体上 开设有装配槽， 所述上颚夹通过销轴铰接在柄体的装配槽上， 所述扭力弹簧设 置在装配槽内， 扭力弹簧的一驱动端设置在上颚夹上， 扭力弹簧的另一端设置 在装配槽上， 还包括弧形齿面嵌块及上齿面嵌块， 所述弧形齿面嵌块包括弧形 齿面及下榫头， 所述柄体头部设置有与下榫头相适配的下榫槽， 通过下榫头与 下榫槽的配合使弧形齿面嵌块固定在柄体上；
所述上齿面嵌块包括上齿面及上榫头， 所述上颚夹上设置有与上榫头相适 配的上榫槽， 通过上榫槽与上榫头的配合使上齿面嵌块固定在上颚夹上。
2、 根据权利要求 1所述的多用棘爪管钳， 其特征在于， 所述下榫头设置在 弧形齿面后端中部， 下榫头与弧形齿面连接处采用阶梯过度， 下榫头是横截面 为矩形的直榫头， 下榫槽是横截面为矩形的直向长槽， 当下榫头插入下榫槽时， 弧形齿面与下榫头连接处的台阶面压紧在下榫槽壁的顶面上；
所述上榫头设置在上齿面后端中部， 上榫头与上齿面连接处采用阶梯过度， 上榫头是横截面为矩形的直榫头， 上榫槽是横截面是矩形的直向长槽， 当上榫 头插入上榫槽时， 上齿面与上榫头连接处的台阶面压紧在上榫槽槽壁的顶面上。
3、 根据权利要求 2所述的多用棘爪管钳， 其特征在于， 还包括第一固定装 置及第二固定装置， 当下榫头插入下榫槽时采用第一固定装置固定， 当上榫头 插入上榫槽时采用第二固定装置固定。
4、 根据权利要求 3所述的多用棘爪管钳， 其特征在于， 所述第一固定装置 为防脱螺釘， 所述下榫槽的一个侧壁上设置有光孔， 所述下榫槽的另一个侧壁 上设置有第一螺孔， 所述下榫头上设置有通孔， 防脱螺釘依次穿过光孔及通孔 并与第一螺孔配合将下榫头固定在柄体上。
5、 根据权利要求 3所述的多用棘爪管钳， 其特征在于， 所述第二固定装置 包括紧定螺釘， 上榫槽一个侧壁上设置有紧定螺孔， 紧定螺釘通过紧定螺孔顶 紧上榫头使上榫头固定在上颚夹上。
6、 根据权利要求 1所述的多用棘爪管钳， 其特征在于， 所述上齿面为 V型 齿面， V型齿面的开口端朝向柄体。
7、 根据权利要求 6所述的多用棘爪管钳， 其特征在于， 所述弧形齿面与上 齿面的齿角小于 90° , 所述弧形齿面的齿角及上齿面的齿角倾斜设置。
8、 根据权利要求 1所述的多用棘爪管钳， 其特征在于， 还包括将下榫头推 出下榫槽的第一卸榫螺釘， 所述柄体上设置有与下榫槽相通的第二螺孔， 所述 第一卸榫螺钉设置在第二螺孔内， 第一卸榫螺釘的末端抵在下榫头上。
9、 根据权利要求 1所述的多用棘爪管钳， 其特征在于， 还包括将上榫头推 出上榫槽的第二卸榫螺釘， 所述上颚夹上设置有与上榫槽相通的第三螺孔， 所 述第二卸榫螺釘设置在第三螺孔内， 第二卸榫螺釘的末端抵在上榫头上。
10、 根据权利要求 1 所述的多用棘爪管钳， 其特征在于， 还包括限位销， 所述扭力弹簧为平列双扭弹簧， 所述限位销设置在平列双扭弹簧下臂的根部上 方， 限制弹簧下臂只能贴近装配槽底移动。
PCT/CN2013/073312 2013-03-07 2013-03-28 多用棘爪管钳 WO2014134848A1 (zh)

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