CN203887761U - Three-point adjustable ratchet wrench end - Google Patents

Abstract

The utility model discloses a wrench, in particular to a three-point adjustable ratchet wrench head; the three-point adjustable ratchet wrench head of the utility model can effectively screw bolts or nuts of various specifications and lengths, And old nuts with damaged corners; including the wrench head seat and the chuck assembly fixed on the wrench head seat, the chuck assembly includes at least three chucks, the chucks are symmetrically arranged and surround a clamping cavity, It includes a foot column fixed on the wrench head seat and an adjustment screw threaded on the foot column, and the adjustment screw relatively moves toward the clamping cavity.

Description

A three-point adjustable ratchet wrench head

technical field

The utility model relates to the technical field of wrenches, in particular to a three-point adjustable ratchet wrench head. the

Background technique

A wrench is a commonly used installation and disassembly tool. It uses the principle of leverage to twist bolts, screws, nuts, and other hand tools that hold the openings or sockets of the bolts or nuts. Its types usually include ratchet wrenches and torque wrenches. However, Although there are many types of wrenches in the prior art, there are generally the following problems: 1. The shape of the opening of the wrench chuck is fixed and cannot be changed, and a wrench can only loosen and tighten bolts and nuts of one to two sizes; 2. Ratchet type socket wrench, one end of which is closed, it is difficult to screw the nut with too long head of the bolt; 3, the old nut with damaged corners of the nut is difficult to loosen. the

Utility model content

In order to solve the above technical problems, the utility model provides a three-point adjustable ratchet wrench head that can effectively screw bolts or nuts of various specifications and lengths, as well as old nuts with damaged corners. the

A three-point adjustable ratchet wrench head of the present utility model includes a wrench head seat and a chuck assembly fixed on the wrench head seat, the chuck assembly includes at least three chucks, and the chucks are arranged axially symmetrically and Enclosing a clamping cavity, the collet includes a foot column fixed on the wrench head seat and an adjustment screw threaded on the foot column, and the adjustment screw relatively moves toward the clamping cavity. the

Further, the wrench head seat includes a ratchet seat and a ratchet plate, the ratchet plate rotates relatively in one direction or two directions on the ratchet seat, and the collet is fixedly arranged on the ratchet plate. the

Further, the ratchet disc and the ratchet seat are ring-shaped and fitted together. the

Further, a two-way preset switch is also provided between the ratchet seat and the ratchet disc, and the two-way preset switch is used to limit the rotation direction of the ratchet disc. the

Further, the ratchet seat is provided with a connecting groove for fixing the handle of the wrench. the

Compared with the prior art, the utility model has the beneficial effects of: it includes a wrench head seat and a collet assembly fixed on the wrench head seat, the collet assembly includes at least three collets, and the collets are symmetrically arranged and surrounded by Cavity, the collet includes a foot column fixed on the wrench head seat and an adjustment screw threaded on the foot column, the adjustment screw moves relative to the clamping cavity; the chuck is distributed in an isosceles triangle, and the three adjustment screws can be clamped vertically. Hold the three symmetrical sides of the outer hexagonal nut. When the outer diameter of the nut is smaller than the inner diameter of the clamping cavity surrounded by the three adjusting screws, the adjusting screws on the three chucks can be adjusted to clamp and fix the nut. The three-point chuck will not damage the corners of the nut due to its small contact surface during the process of tightening the nut. Even the old nut with damaged corners can be clamped to control its tightness; The longer length allows the screwing of nuts that are too long beyond the bolt. the

Description of drawings

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

Fig. 2 is a top view of the utility model after the wrench handle is connected. the

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model. the

As shown in Figures 1 and 2, a three-point adjustable ratchet wrench head of the present invention includes a wrench head seat 1 and a chuck assembly fixed on the wrench head seat, and the chuck assembly includes at least three chucks 2 The collet 2 is symmetrically arranged and encloses a clamping cavity 21. The collet 2 includes a foot column 22 fixed on the wrench head seat and an adjusting screw 23 threadedly mounted on the foot column. The adjusting screw 23 is opposite to the clamping cavity 21. Move; take the three chucks as an example, the chucks are distributed in an isosceles triangle, and the three adjusting screws can just vertically clamp the three symmetrical sides of the outer hexagonal nut. When the outer diameter of the nut is smaller than the three adjusting screws When the inner diameter of the clamping cavity is formed, the adjusting screws on the three chucks can be adjusted to clamp and fix the nut. The three-point chuck will not damage the corners of the nut due to the small contact surface in the process of tightening the nut. , Even the old nuts with damaged corners can be clamped to control their tightness; in addition, due to the long length of the feet, the nuts with too long bolts can be screwed. the

In order to facilitate screwing, a three-point adjustable ratchet wrench head of the present invention, the wrench head seat 1 includes a ratchet seat 11 and a ratchet disc 12, the ratchet disc rotates in one direction or two directions on the ratchet seat, and the collet is fixed on the At the same time, in order to further facilitate the screwing of the overlong nuts of the bolts, the ratchet plate and the ratchet seat are ring-shaped and fitted together, so that the bolt can pass through the ratchet seat and the ratchet plate to facilitate the screwing process. the

In order to realize the two-way rotation and control of the ratchet disc, a three-point adjustable ratchet wrench head of the present invention, a two-way preset switch 13 is also arranged between the ratchet seat and the ratchet disc, and the two-way preset switch is used to limit the movement of the ratchet wheel. The direction of rotation of the disc. the

It should be pointed out that a three-point adjustable ratchet wrench head of the utility model can be used in connection with an ordinary handle or a torque handle. In order to facilitate the connection, the ratchet seat is provided with a connection groove 14 for fixing the handle. , and the connecting groove can be plugged in, or threaded, or even connected to the wrench handle by a rotating shaft, so that the wrench handle can rotate relative to the wrench head, so as to adapt to different operating environments. the

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And modification should also be regarded as the protection scope of the present utility model. the

Claims (5)

1. 3 adjustable ratchet wrench heads, it is characterized in that, comprise spanner headstock and be fixed on the chuck component on spanner headstock, described chuck component comprises at least three chucks, described collet axis is symmetrical arranged and surrounds clamping chamber, described chuck comprises that the socle and the screw thread that are fixed on described spanner headstock are arranged on the set screw on described socle, and described set screw relatively moves towards described clamping chamber.

2. a kind of 3 adjustable ratchet wrench heads as claimed in claim 1, it is characterized in that, described spanner headstock comprises pawl seat and the ratchet cover plate, and the described ratchet cover plate is unidirectional or two-way relatively rotating on described pawl seat, and described chuck is fixedly installed on the described ratchet cover plate.

3. a kind of 3 adjustable ratchet wrench heads as claimed in claim 2, is characterized in that, together with the described ratchet cover plate is annular mutual sheathing with pawl seat.

4. a kind of 3 adjustable ratchet wrench heads as claimed in claim 3, is characterized in that, are also provided with Two-way configuration switch between described pawl seat and the ratchet cover plate, and described Two-way configuration switch is for limiting the rotation direction of the described ratchet cover plate.

5. a kind of 3 adjustable ratchet wrench heads as claimed in claim 2, is characterized in that, are provided with the link slot for back-up wrench handle on described pawl seat.