CN203875790U - Eccentric-type rapid workpiece clamping tool - Google Patents

Abstract

The eccentric workpiece fast clamping tooling involves the processing fields of machinery, electronics and materials. It includes an eccentric screw and a sink nut. The eccentric screw includes a cylindrical screw head and a screw part placed under the screw head and connected to it. The screw head is concavely provided with a non-circular operating hole to drive it to rotate. The axis of the operation hole coincides with the axis of the screw part, and there is an eccentricity of a set distance between the axis of the operation hole and the axis of the screw head; In the counterbore hole of the body, the screw head of the eccentric screw is embedded in the counterbore hole. The eccentric workpiece quick clamping tool has the advantages of compact structure, flexible operation, convenient processing and production, simple and practical, and low maintenance cost. Used in conjunction with the auxiliary positioning mechanism, it can be widely used in machinery, electronics, materials and other processing fields, or in fields that require clamping. It is easy, fast and flexible to operate.

Description

Eccentric Workpiece Quick Clamping Tooling

technical field

The utility model relates to the processing fields of machinery, electronics, materials, etc., in particular to an eccentric fast clamping tool for workpieces.

Background technique

In the processing fields of machinery, electronics, materials and other industries, or in fields with clamping requirements, specific fixtures are usually used to clamp and fix workpieces or objects to be operated. Traditional clamping tools mainly include tools such as vise, vise, splint, etc. These tools must drive the slider through the operating handle, and the slider is used to clamp the workpiece. This kind of tooling is often composed of multiple parts such as handles, screws, sliders, and bases. The structure is complex, the purchase cost is high, and its requirements for later maintenance work are also quite high, which invisibly increases the cost of use. At the same time, such tooling generally has problems such as cumbersome operation and low work efficiency, and after long-term use, due to mechanical wear and other reasons, the accuracy of the tooling is prone to decline, which in turn leads to unstable clamping or inaccurate positioning of the workpiece.

Utility model content

The purpose of the utility model is to provide an eccentric workpiece fast clamping tool. In order to solve the above-mentioned purpose of the utility model, the adopted technical solution is: an eccentric workpiece fast clamping tool, including an eccentric screw and a sink nut, the eccentric screw includes a cylindrical screw head and a The lower part and the screw part connected to it, the screw head is concavely provided with a non-circular operation hole to drive it to rotate, the axis of the operation hole coincides with the axis of the screw part, and the axis of the operation hole coincides with the screw head There is an eccentricity with a set distance between the axes of the parts; the countersunk nut includes a nut head, and a countersunk hole passing through its body is opened in the nut head, and the screw head of the eccentric screw is embedded in the sink hole.

As a further improvement of the eccentric workpiece fast clamping tool, the counterbore hole includes a first installation hole and a second installation hole in a vertical relationship in the head of the nut, and the diameter of the first installation hole is larger than that of the second installation hole. The hole diameter of the installation hole, the screw head is placed in the first installation hole, the screw rod part passes through the second installation hole and protrudes from the bottom surface of the nut head. The height of the screw head is not greater than the depth of the first installation hole. The diameter of the second mounting hole is larger than the outer diameter of the screw part. The non-circular operation hole is in the shape of an inner hexagon. The shape of the nut head is a regular hexagon.

Compared with the prior art, the eccentric workpiece fast clamping tool of the utility model has the beneficial effects as follows:

1) The eccentric workpiece quick clamping tool has the advantages of compact structure, flexible operation, convenient processing and production, simple and practical, and low maintenance cost.

2) The eccentric workpiece fast clamping tool is used in combination with the auxiliary positioning mechanism, which can be widely used in machinery, electronics, materials and other processing fields, or in fields that require clamping. It is easy, fast and flexible to operate.

Description of drawings

Fig. 1 is a structural schematic diagram of the eccentric workpiece fast clamping tool of the present invention.

FIG. 2 is a top view of FIG. 1 .

FIG. 3 is a schematic structural diagram of the eccentric screw 20 in FIG. 1 .

FIG. 4 is a top view of FIG. 3 .

FIG. 5 is a schematic structural diagram of the countersunk nut 30 in FIG. 1 .

FIG. 6 is a top view of FIG. 5 .

Fig. 7 is a schematic diagram of an application example of the eccentric workpiece fast clamping tool of the present invention.

The reference signs in the figure have the following meanings:

10-Eccentric workpiece quick clamping tooling

20-eccentric screw 21-screw head

22-operation hole 23-screw part

30-Sinking nut 31-Nut head

32-Sink hole 321-First mounting hole 322-Second mounting hole

40-workpiece

50 - Auxiliary positioning mechanism.

Detailed ways

The eccentric workpiece quick clamping tool 10 shown in Figures 1 and 2 includes an eccentric screw 20 and a sink nut 30, please refer to Figures 3 and 4 together, the eccentric screw 20 includes a cylindrical screw head 21 and is placed The lower part of the screw head 21 and its integrally formed screw part 23, the screw head 21 is concavely provided with a non-circular operating hole 22 that drives it to rotate, the axis of the operating hole 22 coincides with the axis of the screw part 23, and There is an eccentricity A of a set distance between the axis of the operation hole 22 and the axis of the screw head 21. The size of the eccentricity A can be determined according to the application requirements and occasions. Drive, and then realize the clamping of the workpiece.

The screw part 23 is processed with an external thread, and the thread specification and thread length are determined according to specific usage requirements.

The non-circular operation hole 22 is preferably designed as an inner hexagon, so as to facilitate the installation and disassembly of the eccentric workpiece quick clamping tooling 10 with the inner hexagon wrench. The size of the inner hexagon is determined according to the specific use requirements.

Referring to Figures 5 and 6, the countersunk nut 30 includes a nut head 31, and the nut head 31 is provided with a countersunk hole 32 passing through its body, and the screw head 21 of the eccentric screw 20 is embedded in the countersunk hole 32 . The counterbore hole 32 includes a first mounting hole 321 and a second mounting hole 322 arranged in a vertical relationship in the nut head 31 , and the diameter of the first mounting hole 321 is larger than that of the second mounting hole 322 .

The screw head 21 is placed in the first installation hole 321, and the height of the screw head 21 is not greater than the depth of the first installation hole 321, so that the matching requirements are met between the two, so that the screw head 21 can be completely buried when mating. Into the sinker nut 30, the upper surface of the nut head 31 of the sinker nut 30 does not protrude.

The screw part 23 passes through the second installation hole 322 and protrudes from the bottom surface of the nut head 31 . The diameter of the second mounting hole 322 is larger than the outer diameter of the screw part 23 .

The shape of the nut head 31 can be various shapes such as triangular, quadrangular or circular, which are determined according to the requirements of use. In this embodiment, it is preferably a regular hexagon.

Please refer to Fig. 7, at first the workpiece 40 is placed in the auxiliary positioning mechanism 50, on the auxiliary positioning mechanism 50, a threaded hole is reserved on the side of the workpiece 40 to be clamped and fitted with the screw part 23 of the eccentric screw 20, and the eccentric The screw part 23 of the screw 20 passes through the sinking hole 32 of the sinking nut 30 and is inserted into the threaded hole of the auxiliary positioning mechanism 50, and then the eccentric screw 20 is rotated by using an Allen wrench inserted into the operation hole 22 to drive the sinking nut 30 Translational movement, in order to realize the clamping of the workpiece (as shown in the realization before clamping, as shown in dotted line after clamping).

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Any equivalent changes and improvements made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the present utility model.

Claims (6)

1. An eccentric workpiece quick clamping tool, characterized in that it includes an eccentric screw (20) and a sink nut (30), The eccentric screw (20) includes a cylindrical screw head (21) and a screw part (23) placed under the screw head (21) and connected to it, and the screw head (21) is concavely provided with The non-circular operation hole (22) that drives it to rotate, the axis of the operation hole (22) coincides with the axis of the screw part (23), and the axis of the operation hole (22) coincides with the axis of the screw head (21) There is an eccentricity with a set distance between the axes; The countersunk nut (30) includes a nut head (31), and a countersunk hole (32) passing through its body is opened in the nut head (31), and the screw head of the eccentric screw (20) ( 21) Embedded in the countersunk hole (32). 2. The eccentric workpiece quick clamping tool according to claim 1, characterized in that: the counterbore hole (32) includes a first installation hole (321) arranged in a vertical relationship in the nut head (31) and the second mounting hole (322), the hole diameter of the first mounting hole (321) is larger than the hole diameter of the second mounting hole (322), and the screw head (21) is placed in the first mounting hole (321) wherein, the screw part (23) passes through the second installation hole (322) and protrudes from the bottom surface of the nut head (31). 3. The eccentric workpiece quick clamping tool according to claim 2, characterized in that: the height of the screw head (21) is not greater than the depth of the first installation hole (321). 4. The eccentric workpiece quick clamping tool according to claim 2, characterized in that: the diameter of the second mounting hole (322) is larger than the outer diameter of the screw part (23). 5. The eccentric workpiece quick clamping tool according to any one of claims 1-4, characterized in that the non-circular operation hole (22) is in the shape of an inner hexagon. 6. The eccentric workpiece quick clamping tool according to any one of claims 1-4, characterized in that: the shape of the nut head (31) is a regular hexagon.