CN102699863A

CN102699863A - Screw type puller

Info

Publication number: CN102699863A
Application number: CN2012102257266A
Authority: CN
Inventors: 宋虎
Original assignee: ZHANGJIAGANG TIANDA SPECIAL KNIFE CO Ltd
Current assignee: ZHANGJIAGANG TIANDA SPECIAL KNIFE CO Ltd
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2012-10-03

Abstract

The invention discloses a screw type puller which is capable of adjusting the relative position between claws and a pushing seat according to actual conditions. The screw type puller comprises the pushing seat, a pushing screw and at least one pair of the claws, wherein a pushing screwed hole which is matched with the pushing screw is arranged at the center of the pushing seat, a driving cap is arranged at the top of the pushing screw, a pushing head is arranged at the bottom of the pushing screw, the pushing seat is connected with the corresponding claws through connection plates respectively, positioning holes are opened at two ends of each of the connection plates, positioning holes are opened on claw arms, at least one pair of positioning holes are opened on the claws, and two ends of the connection plates are connected with the claws and the claw arms through bolts and nuts. The screw type puller is widely applicable to detaching fastening parts on various couplers, gears, bearings, belt pulleys and the like.

Description

A kind of screw draws horse

Technical field

The present invention relates to a kind of horse of drawing that axles such as various shaft couplings, gear, bearing and belt pulley are gone up securing member of dismantling, refer more particularly to a kind of screw and draw horse.

Background technology

Draw horse to be also referred to as thruster, be widely used in dismantling axles such as various shaft couplings, gear, bearing, belt pulley and go up fastenings.By its pushing tow mode, be divided into screw usually and draw horse and jack type to draw horse.Present screw draws horse; Its structure comprises: push block be located in the pushing tow screw rod in the push block through screw thread and be movably hinged (or fixed connection) one group of hook (two pawl formula or three-pawl type) together with push block; The top of pushing tow screw rod is provided with the driving cap, and the bottom of pushing tow screw rod is provided with the pushing tow head.During use, hook is caught the object that draws, and rotates the driving cap at pushing tow screw rod top, makes the and then rotation of pushing tow screw rod steadily to advance forward, and hook is drawn back with respect to the pushing tow screw rod, will drawn object to pull out.

Present screw draws horse, and its hook is fixed with respect to the installation site of push block, can not regulate the relative position with push block according to actual needs, thereby restrict its scope of application; In addition, its push block can only be installed a kind of hook of structure, or two pawl formula hooks are installed, or the three-pawl type hook is installed that is:, and versatility is relatively poor; In addition, in the pushing tow process, the head (top) of the pushing tow head of pushing tow screw rod is very easy to impaired, has shortened the service life of pushing tow screw rod.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of and can draw horse according to the screw that actual conditions are adjusted the relative position of hook and push block.

For solving above-mentioned technical problem; The technical scheme that the present invention adopted is: a kind of screw draws horse; Comprise: push block and pushing tow screw rod and at least one pair of hook, the central authorities of push block are provided with the pushing tow screwed hole that matches with the pushing tow screw rod, and the top of pushing tow screw rod is provided with the driving cap; The bottom of pushing tow screw rod is provided with the pushing tow head; Push block links to each other with corresponding hook through connecting plate respectively, and the concrete connected mode of connecting plate and hook and hook arm is: the two ends of connecting plate offer locating hole respectively, offer locating hole on the described hook arm; Offer at least one pair of locating hole on the described hook, the two ends of connecting plate link to each other with hook, hook arm through screw bolt and nut respectively.

Described push block is provided with two hook arm groups; Wherein, Comprise two hook arms of circumferentially evenly arranging in the hook arm group; Comprise three hook arms of circumferentially evenly arranging in another hook arm group, when using, have only a hook arm in the hook arm group to link to each other with corresponding hook through connecting plate respectively at every turn.

Be embedded with hard ball on the end face of said pushing tow head.

Described hard ball is a steel ball.

Described pushing tow screw rod also is provided with below the driving cap and shelves boss.

Offer the whippletree through hole that is used to wear whippletree on the described driving cap.

The invention has the beneficial effects as follows: the present invention is through offering a plurality of locating holes on hook, thereby can regulate the relative position of hook and push block according to actual needs, widened its scope of application; In addition, owing to be detachable structure between hook arm among the present invention and the hook, and; Push block is provided with two hook arm groups, wherein, comprises two hook arms of circumferentially evenly arranging in the hook arm group; Comprise three hook arms of circumferentially evenly arranging in another hook arm group, when using at every turn, can be according to actual needs; On the hook arm group therein hook is installed, versatility is stronger.In addition, be embedded the steel ball in pushing tow head portion, in the progradation of pushing tow screw rod, form rolling friction with contact surface, the impaired probability of steel ball reduces greatly, has prolonged the service life of pushing tow screw rod.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the structural representation of overlooking direction of push block among Fig. 1.

Reference numeral among Fig. 1 to Fig. 2: 1, push block, 10, the pushing tow screwed hole, 11, the hook arm, 12, the hook arm; 13, hook arm, 14, the hook arm, 2, the pushing tow screw rod, 21, drive cap; 211, whippletree through hole, 22, shelve boss, 23, the pushing tow head, 3, hook; 4, connecting plate, 5, steel ball, 7, demolition part, 8, axle.

The specific embodiment

Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.

As shown in Figure 1, a kind of screw of the present invention draws horse, comprising: push block 1, pushing tow screw rod 2 and a pair of hook 3; The central authorities of push block 1 are provided with the pushing tow screwed hole 10 that matches with pushing tow screw rod 2, and the top of pushing tow screw rod 2 is provided with and drives cap 21, and pushing tow screw rod 2 also is provided with below driving cap 21 and shelves boss 22; The bottom of pushing tow screw rod 2 is provided with pushing tow head 23; Be embedded with steel ball 5 on the end face of pushing tow head 23, as shown in Figure 2, described push block 1 is provided with two hook arm groups; Wherein, Comprise two hook arms of circumferentially evenly arranging 11 and 13 in the hook arm group, comprise three hook arms of circumferentially evenly arranging 11,12 and 14 in another hook arm group, wherein hook arm 11 is multiplexing two hook arm groups; During each the use, have only a

hook arm

11,13 or a

hook arm

11,12 in the hook arm group to link to each other with corresponding hook 3 through connecting plate 4 respectively with 14; Connecting plate 4 with the concrete connected mode of hook 3 and hook arm is: the two ends of connecting plate 4 offer locating hole respectively; Offer locating hole on the described hook arm; Offer a pair of locating hole on the described hook 3, the two ends of connecting plate 4 link to each other with

corresponding hook arm

11,12,13 or 14 with hook 3 through screw bolt and nut respectively.In the present embodiment, offer the whippletree through hole 211 that is used to wear whippletree on the described driving cap 21.

During use; Usually the end face of the axle 8 in the demolition part 7 is offered a tapered blind hole that matches with pushing tow head 23; With two pawl formulas or three-pawl type hook 3 and the pushing tow head 23 that is located on the pushing tow screw rod 2 in the push block 1 through screw thread demolition part 7 is fixed on described drawing at once; Then, can directly rotate perhaps a whippletree to be inserted in the whippletree through hole 211 that drives cap 21 with spanner and come rotating drive cap 21, make pushing tow screw rod 2 steadily advance forward; Hook 3 is drawn back with respect to pushing tow screw rod 2, and demolition part 7 is pulled out from axle 8.

Claims

1. a screw draws horse; Comprise: push block and pushing tow screw rod and at least one pair of hook, the central authorities of push block are provided with the pushing tow screwed hole that matches with the pushing tow screw rod, and the top of pushing tow screw rod is provided with the driving cap; The bottom of pushing tow screw rod is provided with the pushing tow head; It is characterized in that: described push block links to each other with corresponding hook through connecting plate respectively, and the concrete connected mode of connecting plate and hook and hook arm is: the two ends of connecting plate offer locating hole respectively, offer locating hole on the described hook arm; Offer at least one pair of locating hole on the described hook, the two ends of connecting plate link to each other with the hook arm with hook through screw bolt and nut respectively.

2. screw as claimed in claim 1 draws horse; It is characterized in that: described push block is provided with two hook arm groups; Wherein, comprise two hook arms of circumferentially evenly arranging in the hook arm group, comprise three hook arms of circumferentially evenly arranging in another hook arm group; During each the use, have only a hook arm in the hook arm group to link to each other with corresponding hook through connecting plate respectively.

3. screw as claimed in claim 1 draws horse, it is characterized in that: be embedded with hard ball on the end face of said pushing tow head.

4. screw as claimed in claim 3 draws horse, it is characterized in that: described hard ball is a steel ball.

5. screw as claimed in claim 1 draws horse, it is characterized in that: described pushing tow screw rod also is provided with below the driving cap and shelves boss.

6. draw horse like each described screw in the claim 1 to 5, it is characterized in that: offer the whippletree through hole that is used to wear whippletree on the described driving cap.