CN203185270U

CN203185270U - Three-jaw puller

Info

Publication number: CN203185270U
Application number: CN 201320145371
Authority: CN
Inventors: 顾建平
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-19
Filing date: 2013-03-19
Publication date: 2013-09-11
Anticipated expiration: 2023-03-19

Abstract

A three-jaw puller comprises a lead screw and a nut seat, wherein the lead screw is sleeved in a threaded hole of the nut seat, three supports are arranged on the circumference of the nut seat at intervals of equal arcs, and a claw hook is installed on each support. First pin shafts are installed on the supports, second pin shafts are installed in the middles of the claw hooks, and connecting sections are eccentrically arranged at two ends of each first pin shaft or each second pin shaft and are fixedly connected with screw caps. The upper ends of connecting pieces are sleeved on the connecting sections or the first pin shafts, and the lower ends of the connecting pieces are sleeved on the second pin shafts or the connecting sections. The three-jaw puller is simple and convenient to operate and good in applicability.

Description

A kind of Three-claw pull-horse

Technical field

The utility model relates to a kind of hand-operated tools, especially a kind of Three-claw pull-horse.

Background technology

Existingly draw horse, comprise leading screw and nut seat, described screw set is contained in the screwed hole of nut seat, one circle of described nut seat waits the circular arc compartment of terrain that three supports are set, every support upper mounting jaw hook, second bearing pin is installed at the middle part of on the described support first bearing pin, described claw hook being installed, and the upper and lower side of brace is sleeved on respectively on first bearing pin, second bearing pin rotationally; The strutting angle and can adjust of described claw hook; The defective that exists is: when pulling force was big, it is motionless that screw mandrel changes, the screw thread easy deformation on screw mandrel and the nut seat, when manually the control leading screw moves, claw hook stressed limited, for example when drawing back bearing enclose, it is relatively poor to be not easy to realize drawing back action, troublesome poeration, applicability.

Summary of the invention

In order to overcome the existing relatively poor deficiency of troublesome poeration, applicability of drawing horse, the utility model provides a kind of easy and simple to handle, Three-claw pull-horse that applicability is good.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of Three-claw pull-horse, comprise leading screw and nut seat, described screw set is contained in the screwed hole of nut seat, one circle of described nut seat waits the circular arc compartment of terrain that three supports are set, every support upper mounting jaw hook, first bearing pin is installed on the described support, second bearing pin is installed at the middle part of described claw hook, the two ends of described first bearing pin or second bearing pin arrange linkage section prejudicially, described linkage section is connected with fixed by nut, the upper end of brace is sleeved on described linkage section or first bearing pin, and the lower end of brace is sleeved on second bearing pin or the linkage section.

Further, described brace has two, and the upper end of two braces is set on two linkage sections or first bearing pin, and the lower end of two braces is set on second bearing pin or the linkage section.

By above-mentioned design, realize the off-centre of first bearing pin or second bearing pin, be arranged in the pin shaft hole; When the akinesia of manual operation leading screw, the off-centre that can rotate described first bearing pin or second bearing pin by instrument from position, the end to a high position, thereby further spur the effect of workpiece; Rotate the off-centre of described first bearing pin or second bearing pin and get back to low level from a high position, just further rotary screw rod is finished a circulation to top tight workpiece.

The beneficial effects of the utility model mainly show: increase the pulling force draw horse, improve the durability of screw mandrel and nut seat, and easy and simple to handle, applicability is good.

Description of drawings

Fig. 1 is the schematic diagram of Three-claw pull-horse.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the schematic diagram of first bearing pin or second bearing pin.

Fig. 4 is the cooperation schematic diagram of first bearing pin or second bearing pin, linkage section and nut.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

With reference to Fig. 1～Fig. 4, a kind of Three-claw pull-horse, comprise screw mandrel 1 and nut seat 2, described leading screw 1 is sleeved in the screwed hole of nut seat 2, one circle of described nut seat 2 waits the circular arc compartment of terrain that three supports 3 are set, every support 3 upper mounting jaw hooks 4, first bearing pin 5 is installed on the described support 3, second bearing pin 6 is installed at the middle part of described claw hook 4, the two ends of described first bearing pin 5 or second bearing pin 6 arrange linkage section 8 prejudicially, described linkage section 8 is connected with fixed by nut, the upper end of brace 7 is sleeved on described linkage section 8 or first bearing pin, and the lower end of brace 7 is sleeved on second bearing pin or the linkage section.

Further, described brace 7 has two, and the upper end of two braces is set on two linkage sections or first bearing pin, and the lower end of two braces is set on second bearing pin or the linkage section.

Certainly, also can select, the two ends of first bearing pin 5 and second bearing pin 6 arrange linkage section 8 simultaneously prejudicially, and the upper end of brace 7 is sleeved on the linkage section of first bearing pin, and the lower end of brace 7 is sleeved on the linkage section of second bearing pin.

Present embodiment realizes that by above-mentioned design first bearing pin or second bearing pin are arranged in the pin shaft hole prejudicially; When the akinesia of manual operation leading screw, the off-centre that can rotate described first bearing pin or second bearing pin by instrument from position, the end to a high position, thereby further spur the effect of workpiece; Rotate the off-centre of described first bearing pin or second bearing pin and get back to low level from a high position, just further rotary screw rod is finished a circulation to top tight workpiece.

Claims

1. Three-claw pull-horse, comprise leading screw and nut seat, described screw set is contained in the screwed hole of nut seat, one circle of described nut seat waits the circular arc compartment of terrain that three supports are set, every support upper mounting jaw hook, second bearing pin is installed at the middle part of on the described support first bearing pin, described claw hook being installed, be characterised in that: the two ends of described first bearing pin or second bearing pin arrange linkage section prejudicially, described linkage section is connected with fixed by nut, the upper end of brace is sleeved on described linkage section or first bearing pin, and the lower end of brace is sleeved on second bearing pin or the linkage section.

2. Three-claw pull-horse as claimed in claim 1, it is characterized in that: described brace has two, and the upper end of two braces is set on two linkage sections or first bearing pin, and the lower end of two braces is set on second bearing pin or the linkage section.