CN101890692A

CN101890692A - Worm gear puller

Info

Publication number: CN101890692A
Application number: CN2009100151867A
Authority: CN
Inventors: 刘增军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-20
Filing date: 2009-05-20
Publication date: 2010-11-24

Abstract

The invention relates to a worm gear puller for di sassembling workpieces. The worm gear puller comprises a supporting body, a threaded ejector rod, a thread bushing matched with the threaded ejector rod and at least two pulling claws hinged on the thread bushing, wherein the pushing end of the threaded ejector rod is provided with a pushing head. The invention is characterized in that the supporting body is a box-shaped body which is internally assembled with a worm and a worm wheel which are in meshing transmission with each other; the rotary end of the worm is positioned outside the box-shaped body; the thread bushing is fixed in the inner bore of a worm-wheel shaft; and the threaded ejector rod matched with the thread bushing passes through the inner bore of the worm-wheel shaft, and the rotary end and the pushing end thereof are respectively positioned outside the box-shaped body. The invention is in worm gear transmission, has large transmission ratio, stable transmission, large generated pulling force and high efficiency, and saves time and labor in the process of disassembling the workpieces.

Description

Worm gear puller

Technical field

The present invention relates to a kind of extracting tool of plant equipment, especially a kind of Worm gear puller.

Background technology

We know, need dismantle part during servicing machine equipment, as dismounting bearing, belt pulley or sprocket wheel or the like, all need to use and draw tool.It all is that the pulling claw formula with two pawls or three-jaw is drawn tool that the mechanical type that is adopted during maintenance at present draws tool.This pulling claw formula draws the structure of tool to mainly include a supporter, one threaded mandrel, one thread bush that is complementary with threaded mandrel or nut and be hinged on two or three pulling claws on the supporting frame, its thread bush or nut and supporter are to be wholely set or to fixedly connected, and in the end of threaded mandrel the top are installed also.Disclose a kind of like this " Reducing broaching tool " of structure in the CN2262464Y China utility model patent specification of for example announcing on September 17th, 1997, it comprises the trident support body, threaded mandrel, three pawl legs, also in the central, threaded hole of this support body, be combined with left and right sides rotation direction thread bush, this cover first half is a left-handed thread section, Lower Half is a right-handed thread section, this right-handed thread section is engaged in again on the connecting rod support body, and this support body is hinged to three connecting rod hinges mechanisms with three pawl legs respectively by three connecting rods again.Revolve the reducing handle on the thread bush about its operation is located at,, finish dismounting task the different-diameter parts to the reducing operation that three pawl legs amplify or shrink.A kind of " drawing tool " disclosed in the CN2332522Y China utility model patent specification of and for example announcing on August 11st, 1999, it is that screw is installed on leading screw, one end of leading screw is installed top, and several supports are installed on the screw, by axle metal zip fastener is installed in the support.Its metal zip fastener also can be done multijaws such as two pawls, three-jaw, four paws as required and use.The disclosed tool that draws all is to utilize pulling claw to collude the part that the position needs dismounting in above-mentioned public use or the open file, utilize the top of threaded mandrel end to lean and dismantle the parts that part matches, the thrust and the pulling force that rotate threaded mandrel and produce reach the purpose that the parts dismounting is separated.Shortcomings such as it is little that but the pulling claw formula of said structure draws the tool ubiquity pulling force, and it is time-consuming to require great effort, and efficient is low.

Summary of the invention

Draw the tool pulling force little in order to overcome in the existing technology pulling claw formula, waste time and energy, inefficient deficiency the invention provides a kind of Worm gear puller, this draws not only compact conformation of device, and is easy to use, and pulling force is big, it is time saving and energy saving to keep in repair, and has improved maintenance efficiency, has reduced maintenance cost.

The technical solution adopted for the present invention to solve the technical problems is: a kind of Worm gear puller, comprise a supporter, one threaded mandrel, one thread bush that is complementary with threaded mandrel and be hinged at least two pulling claws on the supporter, ejection end at described threaded mandrel is equipped with the top, it is characterized in that: described supporter is a box-like body, in this box-like body, be equipped with the worm and worm wheel of the transmission that is meshed, the turn end of worm screw is positioned at outside the box-like body, described thread bush is fixed in the endoporus of worm-wheel shaft, the described threaded mandrel that is complementary with thread bush runs through the endoporus of worm-wheel shaft, its turn end, the ejection end lays respectively at outside the described box-like body.

Described engages worm, the worm gear that is assemblied in the box-like body, its worm gear is assemblied on the box-like body by the bearing that cooperates with it, and its worm screw is assemblied on the box-like body by wear-resistant sleeve.

The described top that is installed in threaded mandrel ejection end is to be installed in rotationally in the stomidium of threaded mandrel ejection end, it is to be cooperated with locating slot on its ectosome by the dog screw that is provided with on the stomidium hole wall to realize axial location, realizes radial location between a bearing and stomidium hole wall.

The round end of described threaded mandrel is shaped on the four directions and revolves head.

The described turn end that is positioned at the outer worm screw of box-like body is shaped on the four directions and revolves head.

The present invention can obtain very big gearratio owing to adopted the worm and gear transmission, is the line contact between two mesh tooth faces, and bearing capacity is big, stable drive.Compact conformation of the present invention is reasonable, make feasible, easy and simple to handle, time saving and energy saving, the removal efficiency height, the maintenance of equipment expense is low.

Description of drawings

The present invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is structure master's cutaway view of the present invention.

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

Fig. 3 is the I place partial enlarged drawing among Fig. 1.

1. box-like body among the figure, 2. threaded mandrel, 3. head is revolved in the four directions, 4. endoporus, 5. body cradle, 6. hinge, 7. pulling claw, 8. top, 9. thread bush, 10. bearing, 11. worm gears, 12. worm screws, 13. wear-resistant sleeve, head is revolved in 14. four directions, 15. stomidiums, 16. dog screws, 17. bearings, 18. locating slots.

The specific embodiment

In Fig. 1, a kind of Worm gear puller, it comprises a threaded mandrel 2, is shaped on the four directions at the rotation end mill of this threaded mandrel 2 and revolves 3, this four directions revolves 3 can cooperate the purpose that reaches turn threaded mandrel 2 with spanner.Ejection end at threaded mandrel 2 is equipped with top 8.

In Fig. 3, the top 8 that is installed in threaded mandrel 2 ejection ends is to be installed in rotationally in the stomidium 15 of threaded mandrel ejection end.As shown in FIG., to be the dog screw 16 that is provided with by threaded engagement on stomidium 15 hole walls with locating slot 18 on the ectosome of top cooperates realizes axial location for it, comes directly towards 8 end and cooperates the realization radial location with stomidium 15 hole walls through bearing 17.This bearing 17 can adopt thrust bearing, bearing top 8 axial force, and guarantees top 8 when the pressure super large, does not rotate with threaded mandrel 2.

As shown in Figure 1, the present invention also includes a supporter, and this supporter is a box-like body 1, is made up of a upper box and a lower box, is connected by bolting between the two.

In box-like body 1, a worm gear 11 through 10 support assemblies of the bearing on it on box-like body 1.

As shown in Figure 1 and Figure 2, a worm screw 12 is assemblied on the box-like body 1 by wear-resistant sleeve 13.Utilize box-like body 1 with the transmission that is meshed between worm gear 11 and the worm screw 12.

In Fig. 2, the turn end of worm screw 12 is positioned at outside the box-like body 1, mills on this turn end to be shaped on the four directions and to revolve 14, and this four directions revolves 14 can cooperate the purpose that reaches turn worm screw 12 with spanner.

Among Fig. 1, the bearing 10 that is assemblied between box-like body 1 and the worm-wheel shaft can adopt cylindrical roller thrust bearing, and it is main axle, united load that this cylindrical roller thrust bearing can bear axial load.

In Fig. 1, the present invention also comprises a thread bush 9 that is complementary with threaded mandrel 2.As shown in Figure 1, thread bush 9 is screwed in the endoporus 4 of worm-wheel shaft.

The threaded mandrel 2 that is complementary with thread bush 9 runs through the endoporus 4 of worm-wheel shaft, and its turn end, ejection end lay respectively at outside the described box-like body 1.

As shown in Figure 1 and Figure 2, through hinge 6 even three hinged pulling claws 7, this pulling claw 7 is used for holding workpiece on the body cradle 5 of box-like body 1 periphery.

The present invention is using at the beginning, pulling claw 7 is colluded in the outer that will dismantle part, rotate four directions on the threaded mandrel 2 turn ends with spanner and revolve 3, top 8 on its ejection end is withstood on the parts that part is installed, afterburning then four directions of rotating on the threaded mandrel 2 turn ends revolve 3 to change motionless till, revolve 14 with the four directions on the spanner rotary worm 12 turn ends then, worm screw 12 drives worm gear 11 and rotates, worm gear 11 rotates and drives thread bush 9 rotations that are fixedly connected with it, thread bush 9 rotates threaded mandrel 2 is imposed severe pressure to the parts that part is installed, and part is slowly pulled out.If part interlock tension, the four directions on the threaded mandrel 2 turn ends that then strike with a hammer revolves 3, makes part loosening, and does not destroy part.

The present invention can obtain very big gearratio by the worm and gear transmission, and it is time saving and energy saving therefore to dismantle part, has improved removal efficiency.

Claims

1. Worm gear puller, comprise a supporter, one threaded mandrel, one thread bush that is complementary with threaded mandrel and be hinged at least two pulling claws on the supporter, ejection end at described threaded mandrel is equipped with the top, it is characterized in that: described supporter is a box-like body, in this box-like body, be equipped with the worm and worm wheel of the transmission that is meshed, the turn end of worm screw is positioned at outside the box-like body, described thread bush is fixed in the endoporus of worm-wheel shaft, the described threaded mandrel that is complementary with thread bush runs through the endoporus of worm-wheel shaft, its turn end, the ejection end lays respectively at outside the described box-like body.

2. a kind of Worm gear puller according to claim 1 is characterized in that: described engages worm, the worm gear that is assemblied in the box-like body, and its worm gear is assemblied on the box-like body by the bearing that cooperates with it, and its worm screw is assemblied on the box-like body by wear-resistant sleeve.

3. a kind of Worm gear puller according to claim 1 and 2, it is characterized in that: the described top that is installed in threaded mandrel ejection end is to be installed in rotationally in the stomidium of threaded mandrel ejection end, it is to be cooperated with locating slot on its ectosome by the dog screw that is provided with on the stomidium hole wall to realize axial location, realizes radial location between a bearing and stomidium hole wall.

4. a kind of Worm gear puller according to claim 1 is characterized in that: the round end of described threaded mandrel is shaped on the four directions and revolves head.

5. a kind of Worm gear puller according to claim 1 is characterized in that: the described turn end that is positioned at the outer worm screw of box-like body is shaped on the four directions and revolves head.