Clamping adjusting chuck of testing machine

Abstract

The utility model discloses a testing machine clamping adjusting chuck which comprises an inner cylinder body, sliding seats are installed on the two sides of the inner cylinder body, the sliding seats penetrate through the outer wall of the inner cylinder body, one sliding seat can rotate along the axis of the inner cylinder body, clamping blocks are installed on the sliding seats and located on the radial inner side of the inner cylinder body, and the outer wall of the inner cylinder body is sleeved with the clamping blocks. The clamping blocks can rotate along the axis of the inner cylinder under the driving of one sliding seat, the clamping blocks are arranged in pairs and provided with wall surfaces, the two wall surfaces are oppositely arranged, a gap cavity is formed between the two wall surfaces, second opening parts are formed in the two sides of the gap cavity, and the wall surfaces are in the shape of inwards-concave arc surfaces; wherein one first opening part and the second opening part are arranged on the same side, and the clamping block rotates to enable the opening of the second opening part to be enlarged. The utility model provides a clamping adjusting chuck of a testing machine. The clamping reliability of a clamping body is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of clamping components for testing machines, and more specifically, to a clamping and adjusting chuck for testing machines. Background Technology

[0002] Currently, when the testing machine is used for testing, the test piece needs to be clamped and fixed. For round pipe fittings, when clamping, the two jaws directly approach and press the pipe fitting radially. Due to the incorrect placement of the pipe fitting, it is easy for it to tilt after clamping, which affects the axial tensile test of the pipe fitting, which is a shortcoming. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a clamping and adjusting chuck for a testing machine, thereby increasing the clamping reliability of the clamping body.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a clamping and adjusting chuck for a testing machine, comprising an inner cylinder, sliding seats installed on both sides of the inner cylinder, the sliding seats passing through the outer wall of the inner cylinder, one of the sliding seats being rotatable along the axis of the inner cylinder, a clamping block installed on the sliding seat, the clamping block being located radially inside the inner cylinder, the clamping block being rotatable along the axis of the inner cylinder under the drive of one of the sliding seats, the clamping blocks being arranged in pairs, the clamping blocks having walls, the two walls being arranged opposite to each other, a gap cavity being formed between the two walls, two openings being formed on both sides of the gap cavity, the wall shape being an inwardly concave arc surface, the inner cylinder having an opening, one of the openings being arranged on the same side as the second opening, the clamping block being rotated to enlarge the opening of the second opening.

[0005] The present invention is further configured such that, when the two clamping blocks are symmetrically distributed along the axis of the inner cylinder, the second opening is located at the minimum distance between the two walls.

[0006] The present invention is further configured to include a rotating cylinder, the inner wall of which is rotatably connected to the outer wall of the inner cylinder. The rotating cylinder includes a sliding part, and one of the sliding seats is installed on the sliding part. The sliding part rotates to drive the sliding seat to rotate.

[0007] The present invention is further configured such that the inner wall of the rotating drum is provided with an internal thread, the outer wall of the inner cylinder is provided with an external thread, and the inner wall of the rotating drum is threadedly connected to the outer wall of the inner cylinder.

[0008] The present invention is further configured such that the inner wall surface of the sliding part is in contact with the outer wall surface of the inner cylinder, so that the sliding part can rotate along the axis of the inner cylinder.

[0009] The present invention is further configured such that the inner cylinder is provided with a groove, and the sliding seat passes through the groove.

[0010] The present invention is further configured such that the clamping block includes a connecting part, a sliding seat is inserted into the connecting part, and the sliding seat and the connecting part are connected by a bearing.

[0011] The present invention is further configured such that an adjusting block is installed on the inner cylinder, the adjusting block and the sliding part are respectively located on both sides of the inner cylinder, and one of the sliding seats is installed on the adjusting block.

[0012] In summary, this utility model has the following beneficial effects:

[0013] 1. By first slightly abutting the two wall surfaces against the clamping body, and then rotating the clamping block, the wall surfaces and the clamping body will come into contact and rub against each other. This helps to make the wall surfaces and the clamping body tangent, thereby aligning the clamping body and facilitating subsequent tests, thus increasing the reliability of clamping.

[0014] 2. By rotating one of the clamping blocks, the opening of one of the openings is enlarged, which makes it easier to place the clamping body between the two clamping blocks, reduces the distance between the two clamping blocks along the radial direction of the inner cylinder, and improves the operating efficiency. Attached Figure Description

[0015] Figure 1 Cross-sectional view of an embodiment Figure 1 ;

[0016] Figure 2 for Figure 1 A cross-sectional view along the MM direction;

[0017] Figure 3 Cross-sectional view of an embodiment Figure 2 .

[0018] Reference numerals: Inner cylinder 1, slide groove 11, opening 12, external thread 13, rotating cylinder 2, internal thread 21, sliding part 22, adjusting block 3, sliding seat 4, clamping block 5, connecting part 51, bearing 511, wall surface 52, gap cavity 6, opening 2 61, clamping body 7. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1-3 As shown in the figure, this embodiment discloses a clamping adjustment chuck for clamping a clamping body 7, which is an elongated tube. The testing machine clamps both ends of the clamping body 7 with the clamping adjustment chuck before performing a tensile test.

[0021] like Figure 1 , Figure 2As shown, the clamping and adjusting chuck of the testing machine includes an inner cylinder 1, which is cylindrical. An opening 12 is provided on one side of the inner cylinder 1. The opening 12 penetrates one side wall of the inner cylinder 1 and axially penetrates the inner cylinder 1 to facilitate the passage of the clamping body 7.

[0022] The inner cylinder 1 is equipped with a rotating cylinder 2, and the inner wall of the rotating cylinder 2 is rotatably connected to the outer wall of the inner cylinder 1. Specifically, the inner wall of the rotating cylinder 2 is provided with an internal thread 21, and the outer wall of the inner cylinder 1 is provided with an external thread 13, and the inner wall of the rotating cylinder 2 is threadedly connected to the outer wall of the inner cylinder 1.

[0023] The rotating drum 2 includes a sliding part 22, the inner wall of which is in contact with the outer wall of the inner cylinder 1, so that the sliding part 22 can rotate along the axis of the inner cylinder 1. An adjusting block 3 is fixedly installed on the inner cylinder 1, and the adjusting block 3 and the sliding part 22 are located on opposite sides of the inner cylinder 1. Sliding seats 4 are threadedly connected to the adjusting block 3 and the sliding part 22, respectively, and the sliding seats 4 pass through the corresponding adjusting block 3 and sliding part 22. The inner cylinder 1 is provided with a sliding groove 11, which penetrates the outer wall of the inner cylinder 1. The sliding seats 4 pass through the sliding groove 11, wherein the left sliding seat 4, driven by the sliding part 22, can rotate along the inner wall of the sliding groove 11 around the axis of the inner cylinder 1.

[0024] Both sides of the sliding seat 4 are equipped with clamping blocks 5. The clamping blocks 5 are located on the radial inner side of the inner cylinder 1. The clamping block 5 includes a connecting part 51. The sliding seat 4 is inserted into the connecting part 51. The sliding seat 4 and the connecting part 51 are connected by a bearing 511. The sliding seat 4 rotates spirally to adjust the distance between the two clamping blocks 5 and ensure that the clamping blocks 5 do not rotate synchronously.

[0025] The clamping blocks 5 are arranged in pairs on the left and right. Each clamping block 5 has a wall surface 52. The two wall surfaces 52 are arranged opposite each other. The shape of the wall surface 52 is a concave arc surface. A gap cavity 6 is formed between the two wall surfaces 52. The gap cavity 6 is axially connected along the inner cylinder 1. Openings 61 are formed on both sides of the gap cavity 6.

[0026] The inner cylinder 1 is provided with an opening 12, one of which is located on the same side as the second opening 61. The opening 12 is used to insert the clamping body 7.

[0027] like Figure 3 As shown, the left clamping block 5 can rotate along the axis of the inner cylinder 1 under the drive of the sliding seat 4. When the clamping block 5 rotates, it enlarges the opening of one of the openings 61, thereby facilitating the insertion of the clamping body 7 between the two clamping blocks 5. After insertion, the clamping block 5 is rotated back to form Figure 1 In the shown state, the two clamping blocks 5 are symmetrically distributed along the axis of the inner cylinder 1, and the opening 61 is located at the minimum distance between the two wall surfaces 52. By rotating the adjusting sliding seat 4, the two wall surfaces 52 are pressed against the clamping body 7. Since the wall surface 52 is a concave arc surface, it is beneficial to increase the contact area between the wall surface 52 and the outer circular wall of the clamping body 7, thereby increasing the clamping reliability.

[0028] In use, first gently abut the two wall surfaces 52 against the clamping body 7, then rotate the clamping block 5. This causes contact friction between the wall surfaces 52 and the clamping body 7, which helps to tangent the wall surfaces 52 and the clamping body 7, thus aligning the clamping body 7 and facilitating subsequent testing, thereby increasing clamping reliability. Figure 1 As shown, after the clamping block 5 rotates, the clamping body 7 cannot be moved out of the opening 61, so as to ensure that the tensile test can be carried out normally and improve safety.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A clamping and adjusting chuck for a testing machine, characterized in that, The system includes an inner cylinder (1), on both sides of which are mounted sliding seats (4). The sliding seats (4) pass through the outer wall of the inner cylinder (1). One of the sliding seats (4) is rotatable along the axis of the inner cylinder (1). Each sliding seat (4) is equipped with a clamping block (5), which is located radially inside the inner cylinder (1). The clamping block (5) is rotatable along the axis of the inner cylinder (1) under the influence of one of the sliding seats (4). The clamping blocks (5) are arranged in pairs. The clamping block (5) is provided with a wall surface (52), and the two wall surfaces (52) are arranged opposite to each other. A gap cavity (6) is formed between the two wall surfaces (52). Openings (61) are formed on both sides of the gap cavity (6). The wall surface (52) is in the shape of a concave arc surface. The inner cylinder (1) is provided with an opening (12). One of the openings (12) is arranged on the same side as the opening (61). The clamping block (5) rotates to increase the opening of one of the openings (61).

2. The clamping and adjusting chuck of the testing machine according to claim 1, characterized in that, When the two clamping blocks (5) are symmetrically distributed along the axis of the inner cylinder (1), the second opening (61) is located at the minimum distance between the two wall surfaces (52).

3. The clamping and adjusting chuck of the testing machine according to claim 1, characterized in that, It also includes a rotating cylinder (2), the inner wall of which is rotatably connected to the outer wall of the inner cylinder (1). The rotating cylinder (2) includes a sliding part (22), and one of the sliding seats (4) is installed on the sliding part (22). The sliding part (22) rotates to drive the sliding seat (4) to rotate.

4. The clamping and adjusting chuck of the testing machine according to claim 3, characterized in that, The inner wall of the rotating cylinder (2) is provided with an internal thread (21), and the outer wall of the inner cylinder (1) is provided with an external thread (13). The inner wall of the rotating cylinder (2) is threadedly connected to the outer wall of the inner cylinder (1).

5. The clamping and adjusting chuck of the testing machine according to claim 3, characterized in that, The inner wall of the sliding part (22) is in contact with the outer wall of the inner cylinder (1) so that the sliding part (22) can rotate along the axis of the inner cylinder (1).

6. The clamping and adjusting chuck of the testing machine according to claim 1, characterized in that, The inner cylinder (1) is provided with a groove (11), and the sliding seat (4) passes through the groove (11).

7. The clamping and adjusting chuck of the testing machine according to claim 1, characterized in that, The clamping block (5) includes a connecting part (51), the sliding seat (4) is inserted into the connecting part (51), and the sliding seat (4) is connected to the connecting part (51) through a bearing (511).

8. The clamping and adjusting chuck of the testing machine according to claim 3, characterized in that, The inner cylinder (1) is equipped with an adjusting block (3), and the adjusting block (3) and the sliding part (22) are located on both sides of the inner cylinder (1), and one of the sliding seats (4) is installed on the adjusting block (3).

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