CN2855651Y - Puller - Google Patents

Abstract

The utility model discloses a drawing device, comprising a clamping jaw, a bush, a fixing coil, a screw rod and a handle. The clamping jaw is a ring-shaped hough formed by the involution of two upper and lower half segments. The front end of the clamping jaw is provided with a flange for clamping the end face of a gearwheel. The bush with an inner thread on one end stretches into the clamping jaw. Corresponding steps are respectively arranged on the outer margin of the bush and the inner wall of the clamping jaw. The fixing coil for locking is nested on the external diameter of the clamping jaw. The screw rod is spun into the bush by means of a thread. The handle for rotating the screw rod is arranged on the stretching-out end of the screw rod. The flange of the clamping jaw contacts the end face of the parts in a large area, which is favorable for the protection of the parts in the application of force process. An external diameter sleeve of the clamping jaw is provided with the fixing coil, which can prevent the clamping jaw to slide in the radial direction under the effect of the tension, and thus the drawing device can work efficiently. The intensity of the drawing device is quite high and thus the drawing device is not easy to be deformed, which can correspondingly improve the exerted acting force in use.

Description

Drawbench

One, technical field

The utility model relates to a kind of axle and goes up parts extracting tool, a kind of specifically drawbench.

Two, background technology

The parts that are installed on the axle mostly adopt connection interference fits more closely, some even employing interference fit are to improve the reliability that connects, as the revolution parts on a lot of plant equipment, because if it connects very tight and is installed on the axle for a long time, parts can hold tightly together because of corrosion and axle, so in maintenance process, the situation that is difficult to unload often occurs.The rigid dismounting of powerful measure such as knock and damage parts easily if adopt, in order to overcome this defective, two pawls of employing or three-jaw drawbench are also arranged in order to the dismounting parts in the industry, these two kinds of drawbench are similar, strip pulling claw equal angles is suspended on the extension dish, be provided with threaded mandrel in extension disk center position, during use pulling claw is hooked part end face, push rod is against a central hole location, then rotate push rod, rely on spiral thrust effect impeller-hub to move forward, thereby and pulling claw pulling part move part is unloaded round about.But the drawbench of this structure, the tail end of its strip pulling claw is movably connected on the extension dish, in drawing process, especially when the frictional force between part and the axle is very big, pulling claw is under powerful pulling force effect, can finally may break away from parts and can't effectively use because the influence of radial component is outwards slided along part end face.In the work, the parts end face has only two or three stress points, easily causes the stressed unbalance parts that cause to be difficult to unload, even makes the parts stress deformation too greatly because of pulling capacity.The pulling capacity of this drawbench is also less, and the pulling claw of strip uses distortion serious for a long time.In addition, use this drawbench that operator's technical ability is had relatively high expectations.

Three, summary of the invention

The purpose of this utility model provides a kind of simple to operate, and claw can slippage in drawing process, and the bigger drawbench of pulling force, and this drawbench not only in use can not damage parts to be removed, nor drawbench itself is deformed.

The purpose of this utility model is achieved through the following technical solutions:

A kind of drawbench, it is characterized in that: it comprises claw, lining, retainer plate, screw rod and handle, described claw is the annular Hough that involutes of two half-sections up and down, be provided with the flange that is used to block gear face at the claw front end, the lining that a described end has internal thread stretches in the claw, on lining outer rim and claw inwall, be respectively equipped with corresponding step, the fixed trap of locking usefulness is on the external diameter of claw, screw rod is by being threaded in the lining, and the handle that is used for rotary screw is arranged on the external part of screw rod.

Claw in the utility model adopts by two half-sections up and down and involutes half slide structure, can be very convenient install on the parts and unload waiting to tear open, to up and down in the work, the claw of half-section is enclosed within on the parts respectively, flange on the claw is stuck near the parts end face chamfering, follow fixed trap on the claw external diameter, use the handle rotary screw then, screw rod is contacted with the axial end that parts are installed, continue rotary handle, under the effect of spiral thrust, lining outwards moves, in case the step on the step of lining outer rim and the claw inwall offsets, spiral thrust then acts on the parts by claw, under the acting in conjunction of screw rod and claw, axle relatively moves with the parts generation that is installed on the axle, and parts unload from axle the most at last.External diameter at claw is with retainer plate, because retainer plate can very effective locking claw, has prevented that claw from producing radial slippage under powerful pulling force effect.

In order to prevent from use to damage the screw thread on the screw rod, can be provided with a truncation bar at screw front end.

The utlity model has following advantage: the contact area that is used to block and spur the flange of parts and parts end face on (1) claw is big, with respect to knocking and existing drawbench small size stress surface more helps the protection of parts; (2) external diameter of claw is with retainer plate, prevents that claw from producing radial slippage under the pulling force effect, and drawbench can effectively be worked; (3) because claw is annular half slide structure, and intensity is higher, so not yielding, the active force that applies in using simultaneously can correspondingly improve; (4) simple in structure, be convenient to make, and operation is also very convenient.

Four, description of drawings

Fig. 1 is a structural representation of the present utility model;

Five, the specific embodiment

The utility model is described in further detail below in conjunction with embodiment.

As shown in Figure 1, drawbench described in the utility model, comprise claw 1, lining 2, retainer plate 3, screw rod 4 and handle 5, claw 1 is the annular Hough that involutes of two half-sections up and down, be provided with the annular lip that is used to block parts end face to be removed at claw 1 front end, one end of lining 2 stretches in the claw 1, the inner surface of its other end is provided with internal thread, on lining 2 outer rims and claw 1 inwall, be respectively equipped with corresponding step, the applying that in the drawbench use, offsets of two steps, so that active force is passed to claw 1 by lining 2, the retainer plate 3 of locking usefulness is enclosed within on the step surface of claw 1 external diameter.Screw rod 4 is by being threaded in the lining 2, and screw rod 4 front ends also are provided with the push rod of a truncation push shaft end face, and the handle 5 that is used for rotary screw 4 is arranged on the external part of screw rod 4.The size of this drawbench is according to the parts manufacturing that will dismantle, to adapt to different needs.

Claims (2)

1, a kind of drawbench, it is characterized in that: it comprises claw (1), lining (2), retainer plate (3), screw rod (4) and handle (5), described claw (1) is the annular Hough that involutes of two half-sections up and down, be provided with the flange that is used to block parts end face to be removed at claw (1) front end, the lining (2) that a described end has internal thread stretches in the claw (1), on lining (2) outer rim and claw (1) inwall, be respectively equipped with corresponding step, the retainer plate (3) of locking usefulness is enclosed within on the external diameter of claw (1), screw rod (4) is by being threaded in the lining (2), and the handle (5) that is used for rotary screw (4) is arranged on the external part of screw rod (4).

2, according to the described drawbench of claim 1, it is characterized in that: described screw rod (4) front end is provided with a truncation bar.

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