CN202846468U

CN202846468U - Screw type thruster

Info

Publication number: CN202846468U
Application number: CN 201220316446
Authority: CN
Inventors: 宋虎
Original assignee: Zhangjiagang Tianda Tool Co Ltd
Current assignee: Zhangjiagang Tianda Tool Co Ltd
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2013-04-03
Anticipated expiration: 2022-07-03

Abstract

The utility model discloses a screw type thruster which is capable of being installed with a two-claw type hook-like claw or a three-claw type hook-like claw according to practical situations. The screw type thruster comprises a pushing seat, a pushing screw and at least one pair of hook-like claws. A pushing threaded hole is formed in the center of the pushing seat, and is matched with the pushing screw. A driving cap is arranged on the top of the pushing screw. A pushing head is arranged at the bottom of the pushing screw. The pushing seat is provided with two hook-like claw arm groups, wherein a hook-like claw group comprises two hook-like claw arms which are evenly arranged along a circumferential direction, and the other hook-like claw arm group comprises three hook-like claw arms which are evenly arranged along the circumferential direction. Every time the screw type thruster is in use, only the hook-like claw arms of one of the two hook-like claw arm groups are respectively connected with a corresponding hook-like claw through connecting plates. The screw type thruster is widely used for dismantling various fastening parts, which are on shafts, such as couplers, gears, bearings and belt pulleys.

Description

Screw draws horse

Technical field

The utility model relates to a kind of horse of drawing that the axles such as various shaft couplings, gear, bearing and belt pulley tighten firmware of dismantling, and refers more particularly to a kind of screw and draws horse.

Background technology

Draw horse to be also referred to as thruster, be widely used in dismantling the axles such as various shaft couplings, gear, bearing, belt pulley and tighten part.By its pushing tow mode, usually be divided into screw 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 by screw thread and be movably hinged (or being fixedly connected with) 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, so that the and then rotation of pushing tow screw rod steadily advances forward, hook is drawn back with respect to the pushing tow screw rod, will be drawn object to pull out.

Present screw draws horse, and 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; And hook is fixed with respect to the installation site of push block, can not regulate according to actual needs the relative position with push block, thereby restrict its scope of application; 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.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of and can draw horse according to the screw that actual conditions are installed two pawl formulas or three-pawl type hook.

For solving above-mentioned technical problem, the technical scheme that the utility model adopts 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, 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, be provided with two hook arm groups on the described push block, wherein, comprise two hook arms that circumferentially are evenly arranged in the hook arm group, comprise three hook arms that circumferentially are evenly arranged in another hook arm group, during each the use, only have a hook arm in the hook arm group to link to each other with corresponding hook by connecting plate respectively.

The concrete connected mode of described connecting plate and hook and hook arm is: the two ends of connecting plate offer respectively locating hole, 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 by screw bolt and nut respectively.

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

Described hard ball is steel ball.

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

Offer be used to the whippletree through hole that wears whippletree on the described driving cap.

The beneficial effects of the utility model are: owing to be Demountable between the hook arm in the utility model and the hook, and, be provided with two hook arm groups on the push block, wherein, comprise two hook arms that circumferentially are evenly arranged in the hook arm group, comprise three hook arms that circumferentially are evenly arranged in another hook arm group, during each the use, can on the hook arm group therein hook be installed according to actual needs, versatility is stronger.In addition, by offering a plurality of locating holes at hook, thereby can regulate according to actual needs the relative position of hook and push block, widen its scope of application; In addition, be embedded the steel ball in pushing tow head section, 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 structural representation of the present utility model.

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, hook arm, 13, the hook arm, 14, the hook arm, 2, pushing tow screw rod, 21, drive cap, 211, the whippletree through hole, 22, shelve boss, 23, the pushing tow head, 3, hook, 31, locating hole, 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 utility model in detail.

As shown in Figure 1, a kind of screw described in the utility model draws horse, comprise: 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, the top of pushing tow screw rod 2 is provided with and drives cap 21, 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, be provided with two hook arm groups on the described push block 1, wherein, comprise two

hook arms

11 and 13 that circumferentially are evenly arranged in the hook arm group, comprise three hook arms 11 that circumferentially are evenly arranged in another hook arm group, 12 and 14, wherein hook arm 11 is multiplexing two hook arm groups, when using, only has a hook arm 11 in the hook arm group at every turn, 13 or

hook arm

11,12 link to each other with corresponding hook 3 by 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 respectively locating hole, offer locating hole on the described hook arm, offer a pair of locating hole 31 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 by screw bolt and nut respectively.In the present embodiment, offer be used to the whippletree through hole 211 that wears 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 by screw thread demolition part 7 is fixed on described drawing at once, then, can be inserted in the whippletree through hole 211 that drives cap 21 with the direct rotation of spanner or with a whippletree and come rotating drive cap 21, so that pushing tow screw rod 2 steadily advances 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. 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, 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: be provided with two hook arm groups on the described push block, wherein, comprise two hook arms that circumferentially are evenly arranged in the hook arm group, comprise three hook arms that circumferentially are evenly arranged in another hook arm group, during each the use, only have a hook arm in the hook arm group to link to each other with corresponding hook by connecting plate respectively.

2. screw as claimed in claim 1 draws horse, it is characterized in that: the concrete connected mode of described connecting plate and hook and hook arm is: the two ends of connecting plate offer respectively locating hole, 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 by screw bolt and nut 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 described pushing tow head.

4. screw as claimed in claim 3 draws horse, it is characterized in that: described hard ball is 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 such as each described screw in the claim 1 to 5, it is characterized in that: offer be used to the whippletree through hole that wears whippletree on the described driving cap.