CN202805001U - A clamping device - Google Patents

Abstract

The utility model relates to a clamping device, which comprises a base, a left clamping block, a right clamping block and a screw rod, wherein the base is provided with a cavity, the lower end surface of the base is provided with an opening communicated with the cavity, the rear side surface of the cavity is provided with a left guide groove and a right guide groove which are symmetrical and inclined, a through hole vertically penetrates through the cavity from the upper end surface of the base, and the through hole is provided with an internal thread; the back surfaces of the left clamping block and the right clamping block are provided with a left guide rail and a right guide rail which are matched with the left guide groove and the right guide groove, the left clamping block and the right clamping block are provided with a left clamping surface and a right clamping surface, the left clamping surface and the right clamping surface are provided with a left concave cavity and a right concave cavity, and the left clamping surface and the right clamping surface are opposite to each other so that the left concave cavity and the right concave cavity form an accommodating space with an upper; the screw rod enters the cavity after matching with the internal thread along the through hole of the base, the lower end of the screw rod is provided with an annular bulge which is contained in the containing space, and the annular bulge pushes and presses the upper end surface and the lower end surface of the containing space when the screw rod moves upwards or downwards. The utility model has the advantages that: simple structure and convenient operation.

Description

A clamping device

(1) Technical field

The utility model relates to a material clamping device.

(2) Background technology

At present, in the combined testing of materials such as tension, compression, bending, and torsion, professional equipment is used for testing, and a clamping device for fixing the material is required. The clamping devices currently on the market have complex structures and are difficult to operate.

(3) Contents of the invention

The purpose of this utility model is to design a material clamping device suitable for fixing materials to better adapt to the combined tests of pulling, pressing, bending and twisting on materials by special equipment.

For this reason, the utility model adopts following scheme to achieve the above-mentioned purpose:

A clamping device, comprising a base, a left clamping block, a right clamping block and a screw rod, characterized in that: the base has a cavity, the lower end of the base is provided with an opening communicating with the cavity, the cavity There are symmetrical and inclined left guide grooves and right guide grooves on the rear side, a through hole vertically penetrates from the upper end surface of the base to the cavity, and the through hole is provided with internal threads; The left guide groove is matched and installed, and the left clamping block has a left clamping surface, and the left clamping surface is provided with a left concave cavity; It has a right clamping surface, and the right clamping surface is provided with a right concave cavity; the left clamping surface and the right clamping surface face each other so that the left concave cavity and the right concave cavity form an accommodation space, and the accommodation space has a lower end surface and a The upper end surface; the screw enters the cavity along the through hole of the base and cooperates with the internal thread. The lower end of the screw is provided with an annular protrusion to be accommodated in the accommodating space. When the screw moves downward, the ring The lower end surface of the protrusion pushes the lower end surface of the accommodating space, and the upper end surface of the annular protrusion pushes the upper end surface of the accommodating space when the screw moves upward.

The above-mentioned clamping device is characterized in that an opening is provided on the front end of the base to communicate with the cavity, and a detachable block is provided on the left and right sides of the front end of the base to block the left clamping block and the right clamping block. placed in the cavity.

The above-mentioned clamping device is characterized in that: the left side of the cavity is parallel to the left guide groove, the right side of the cavity is parallel to the right guide groove; the left clamping block is parallel to the left guide groove; The side opposite to the left clamping surface is an inclined surface and is attached to the left side of the cavity, and the side of the right clamping block opposite to the right clamping surface is an inclined surface and is attached to the right side of the cavity. combine.

The above-mentioned material clamping device is characterized in that: the upper end of the screw rod is also provided with a locking device, the locking device includes a bolt hole arranged through the radial direction of the screw rod, an external thread arranged on the screw rod and connected with the said screw rod. The external thread cooperates with the installation lock nut.

The above-mentioned clamping device is characterized in that: a handwheel is provided on the upper end of the screw and below the locking device.

The utility model has the advantages of simple structure and convenient operation.

(4) Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the decomposed state of the utility model;

Fig. 2 is a three-dimensional schematic diagram of the assembled state of the utility model;

Fig. 3 is a cross-sectional view when the lower end surface of the annular protrusion pushes the lower end surface of the accommodation space;

Fig. 4 is a cross-sectional view when the upper end surface of the annular protrusion pushes the upper end surface of the accommodation space;

Fig. 5 is A-A sectional view among Fig. 2;

Fig. 6 is a three-dimensional schematic diagram when the utility model is hung on the test device;

Fig. 7 is a three-dimensional schematic diagram of the decomposed state of the utility model when it is hung on the test device.

(5) Specific implementation methods

A clamping device as shown in FIGS. 1 to 5 includes a base 1 , a left clamping block 2 , a right clamping block 3 and a screw 4 .

The base 1 has a cavity 11, the lower end surface of the base 1 is provided with an opening to communicate with the cavity 11, the rear side of the cavity 11 has a left guide groove 16 and a right guide groove 17 which are symmetrically and obliquely arranged, and a through The hole vertically penetrates from the upper end surface of the base 1 to the cavity 11, and the through hole is provided with an internal thread.

The back side of the left clamping block 2 is provided with a left guide rail to cooperate with the left guide groove 16. The left clamping block 2 has a left clamping surface 21, and the left clamping surface 21 is provided with a left concave cavity 22; the back side of the right clamping block 3 A right guide rail is provided to cooperate with the right guide groove 17, and the right clamping block 3 has a right clamping surface 31, and the right clamping surface 31 is provided with a right concave cavity 32; the left clamping surface 21 and the right clamping surface 31 The left cavity 22 and the right cavity 32 face each other to form a receiving space, and the receiving space has a lower end surface 10-2 and an upper end surface 10-1. Protrusions are provided on the left clamping surface 21 and the right clamping surface 31 to form friction surfaces.

The left side of the cavity 11 is parallel to the left guide groove 16, and the right side of the cavity 11 is parallel to the right guide groove 17; the side opposite to the left clamping surface 21 on the left clamping block 2 It is an inclined surface and is attached to the left side of the cavity 11 , and the side of the right clamping block 3 opposite to the right clamping surface 31 is an inclined surface and is attached to the right side of the cavity 11 .

The screw 4 enters the cavity 11 along the through hole of the base 1 and cooperates with the internal thread. The lower end of the screw 4 is provided with an annular protrusion 42 to be accommodated in the accommodation space. When the screw 4 moves downward The lower end surface of the annular protrusion 42 pushes the lower end surface 10-2 of the accommodating space; when the screw 4 moves upward, the upper end surface of the annular protrusion 42 pushes the upper end surface 10-1 of the accommodating space.

A locking device 5 is also provided on the upper end of the screw rod 4, and the locking device 5 includes a pin hole 51 radially penetrating through the screw rod 4, an external thread arranged on the screw rod 4 and a locking nut cooperating with the external thread. 52. The upper end of the screw rod 4 and the lower part of the locking device 5 are provided with a hand wheel 43 to facilitate the rotation of the screw rod 4 .

In the above-mentioned embodiment, there is no opening on the front end of the base 1 to communicate with the cavity 11, and the left clamping block 2 and the right clamping block 3 are clamped in the cavity 11, which is inconvenient to observe the left clamping block 2 and the right clamping block 3 in the cavity 11, so the base 1 can be designed such that the front end of the base 1 is provided with an opening to communicate with the cavity 11, and the front end of the base 1 is provided with a detachable block (14 , 15) The left clamping block 2 and the right clamping block 3 are blocked and accommodated in the cavity 11 to achieve the same purpose.

In actual use, it is installed on the professional test equipment used for combined tests such as tension, compression, bending and torsion on materials, as shown in Figure 6 and Figure 7, the test equipment generally has a beam 61, and a beam 61 is provided with a A cylindrical mounting seat 62 with an opening downward, and a through hole 63 corresponding to the pin hole 51 on the screw rod 4 is provided on the mounting seat 62 along its radial direction. The upper end of screw rod 4 stretches in the opening of mounting seat 62, adjusts screw rod 4 so that the central axis of latch hole 51 on it is concentric with the central axis of the through hole 63 on the mounting seat 62, and then a latch 64 along the through hole The central axis of 63 is inserted to prevent the clamping device from sliding axially along the screw rod 4, and finally the locking nut 52 is locked, and the clamping device is firmly fixed on the test equipment for test operation.

It is necessary to point out that the above embodiments are only used to further illustrate the utility model, and cannot be interpreted as limiting the protection scope of the utility model, and those of ordinary skill in the art can make the above implementation methods according to the essence of the utility model. Some non-essential improvements and adjustments.

Claims (5)

1. A material clamping device, comprising a base, a left clamping block, a right clamping block and a screw rod, is characterized in that: The base has a cavity, the lower end surface of the base is provided with an opening to communicate with the cavity, the rear side of the cavity has a symmetrical and inclined left guide groove and a right guide groove, and a through hole is formed by the base. The upper end surface vertically penetrates to the cavity, and the through hole is provided with internal threads; The back side of the left clamping block is provided with a left guide rail to cooperate with the left guide groove, the left clamping block has a left clamping surface, and the left clamping surface is provided with a left concave cavity; The back side of the right clamping block is provided with a right guide rail to cooperate with the right guide groove, the right clamping block has a right clamping surface, and the right clamping surface is provided with a right concave cavity; The left clamping surface and the right clamping surface face each other so that the left cavity and the right cavity form an accommodation space, and the accommodation space has a lower end surface and an upper end surface; The screw enters the cavity along the through hole of the base and cooperates with the internal thread. The lower end of the screw is provided with an annular protrusion to be accommodated in the accommodating space. When the screw moves downward, the annular protrusion The lower end surface pushes the lower end surface of the accommodating space, and the upper end surface of the annular protrusion pushes the upper end surface of the accommodating space when the screw moves upward. 2. A material clamping device according to claim 1, characterized in that: the front end of the base is provided with an opening to communicate with the cavity, and the front end of the base is provided with a detachable block on the left and right sides to clamp the left side. The block and the right clamping block are blocked and accommodated in the cavity. 3. A clamping device according to any one of claims 1 or 2, characterized in that: the left side of the cavity is parallel to the left guide groove, and the right side of the cavity is parallel to the The right guide groove is parallel; the side opposite to the left clamping surface on the left clamping block is a slope and fits with the left side of the cavity, and the side opposite to the right clamping surface on the right clamping block is a slope And stick to the right side of the cavity. 4. A clamping device according to claim 3, characterized in that: the upper end of the screw rod is also provided with a locking device, the locking device includes a pin hole arranged through the radial direction of the screw rod, and is arranged on the screw rod. The external thread and the locking nut are installed in cooperation with the external thread. 5. A clamping device according to claim 4, characterized in that: a handwheel is provided on the upper end of the screw and below the locking device.

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