Anchor bolt disc pulling resistance testing device

Abstract

The utility model relates to an anchor bolt disc anti-pulling force test device, which comprises an occlusion part, the occlusion part comprises a ring sleeve sleeved outside an anchor bolt body, at least two groups of grooves are arranged around the circumferential direction of the ring sleeve, occlusion claws are rotatably connected in the grooves, a driving ring is rotatably connected outside the ring sleeve, and the driving ring is connected outside the driving ring. The driving ring supports the free ends of the biting claws from inside to outside, and when the driving ring moves towards the rotating center of the biting claws, the biting ends of the biting claws are driven to rotate inwards and are meshed with an anchor bolt body. According to the meshing structure based on rotation, the anchor bolt head is meshed through inward rotation of the meshing claws, meshing force can be decomposed into acting force in the radial direction and the axial direction, the acting force in the axial direction can directly act on drawing force borne by the anchor bolt body, and therefore meshing firmness is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of anchor bolts, and particularly relates to an anchor bolt disc pull-out resistance test device. Background Art

[0002] The anchor disc pull-out test device is an engineering test device used to evaluate the pull-out resistance of anchor bolts. It has a biting end and a pulling end. The biting end bites the anchor bolt head, and then the pulling end is connected to the anchor disc. The test can be carried out by driving the pulling end to move along the direction of the anchor bolt.

[0003] However, in the prior art, the fixing of the occlusal end to the anchor bolt head is not strong enough and is easily separated during the pull-out test; Figure 4 As shown, the essence of this is that when the two radially moving clamps engage the anchor head, they only have a radial extrusion force F1, while the pulling force F borne by the anchor head is axial, that is, F1 is perpendicular to F, and the applied extrusion force F1 cannot directly act on the pulling force F. Utility Model Content

[0004] The utility model addresses the problem in the prior art that the radially moving clamping block is not firmly engaged with the anchor bolt head, and provides an anchor bolt disc pullout resistance test device. The specific technical solution is as follows:

[0005] The anchor disc pull-out resistance test device includes a biting portion, which includes a ring sleeve arranged outside the anchor body, and at least two groups of grooves are opened around the circumference of the ring sleeve. A bite claw is rotatably connected in the groove, and a drive ring is rotatably connected outside the ring sleeve. The drive ring supports the free end of the bite claw from the inside to the outside. When the drive ring moves toward the rotation center of the bite claw, it drives the biting end of the bite claw to rotate inward and bite the anchor body.

[0006] As a further technical solution of the present invention, both ends of the ring sleeve are provided with biting claws, and the biting claws on the two ends of the ring sleeve are symmetrical to each other.

[0007] As a further technical solution of the present invention, the biting end of the biting claw has a sharp corner.

[0008] As a further technical solution of the present invention, in the biting claw, the length of the end located above the rotation center is smaller than the length of the end located below the rotation center.

[0009] As a further technical solution of the utility model, it includes an outer frame, on which a support frame is installed, and the support frame is connected around the middle of the ring sleeve.

[0010] The beneficial effects of the utility model are as follows:

[0011] In the present application, a rotation-based biting structure is provided, which utilizes the inward rotation of the biting claw to bite the anchor head. The biting force can be decomposed into radial and axial forces, and the axial force can directly act on the pulling force exerted on the anchor body to improve the firmness of the biting. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure shows the overall structure of the anchor disc pull-out force test device;

[0013] Figure 2 shows a schematic structural diagram of the occlusal portion;

[0014] Figure 3 A schematic structural diagram of a biting claw is shown;

[0015] Figure 4 The figure shows the force analysis diagram of the anchor bolt head and the clamping block in the prior art;

[0016] Figure 5 The diagram shows the force analysis of the anchor body and the gripper in the anchor disc pull-out resistance test device.

[0017] Legend:

[0018] 100, outer frame; 200, pulling part; 300, anchor bolt body; 400, bite part; 410, ring sleeve; 420, groove; 430, bite claw; 431, sharp corner; 440, drive ring; 500, support frame. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] Based on the problem in the prior art that the radially moving clamping block is not firmly engaged with the anchor bolt head, this application provides a rotation-based engagement structure, such as Figure 5 As shown, the jaws are rotated inward to engage the anchor head, and the applied engaging force is defined as F2. F2 can be decomposed into the F axis in the axial direction and the F diameter in the radial direction, and the F axis can directly act on F to increase the firmness of the engagement.

[0021] Figure 1 The figure shows the overall structure of the anchor disc pull-out force test device; Figure 1The anchor disc pull-out force test device includes an outer frame 100, in which a pulling portion 200, an anchor body 300 and a biting portion 400 are sequentially arranged from top to bottom. The output end of the pulling portion 200 is connected to the disc of the anchor body 300, and the biting portion 400 is connected to the anchor head of the anchor body 300; the biting portion 400 bites the anchor head of the anchor body 300, and the pulling portion 200 is connected to the disc of the anchor body 300. The pulling portion 200 is driven to increase the distance between the pulling portion 200 and the biting portion 400 to pull the anchor body 300; the biting portion 400 is connected to the outer frame 100 through a support frame 500; the support frame 500 is connected to the outer frame 100 and is connected to the middle of the ring sleeve 410; the ring sleeve 410 can be suspended.

[0022] Figure 2 The structural diagram of the biting part 400 is shown; the biting part 400 includes a ring 410 that is sleeved on the outside of the anchor body 300, and at least two groups of grooves 420 are opened around the ring 410 in the circumferential direction. A bite claw 430 is rotatably connected in the groove 420, and a drive ring 440 is rotatably connected to the ring 410. The drive ring 440 supports the free end of the bite claw 430 from the inside to the outside. When the drive ring 440 moves toward the rotation center of the bite claw 430, the bite end of the drive claw 430 rotates inward and bites the anchor body 300; because the bite claw 430 is rotatably connected in the groove 420, and the drive ring 440 supports the free end of the bite claw 430 from the inside to the outside, when the drive ring 440 moves toward the rotation center of the bite claw 430, it can The free end of the jaws 430 is driven to rotate and open, and at the same time, the engaging end of the jaws 430 rotates inward and engages the anchor body 300, thereby locking the anchor body 300. Since the jaws 430 are engaged in rotation, the engaging force can be decomposed into radial and axial forces, and the axial force can directly act on the pulling force on the anchor body 300 to improve the firmness of the engagement. The jaws 430 are arranged at both ends of the ring sleeve 410, and the jaws 430 on the two ends of the ring sleeve 410 are symmetrical to each other. Therefore, the anchor body 300 has at least two engaging points, and the axial forces applied by the two engaging points are opposite, so that the movement trend of the anchor body 300 can be blocked in two axial directions.

[0023] Figure 3 shows a schematic structural diagram of the biting claw 430; Figure 3 In the embodiment, the engaging end of the bite claw 430 has a sharp corner 431; in the engaged state, the sharp corner 431 of the bite end can contact the anchor bolt body 300 to ensure pressure; in the bite claw 430, the length of the end above the rotation center is shorter than the length of the end below the rotation center; that is, under normal conditions, due to the influence of gravity, the length of the end below the rotation center is longer, so the bite claw 430 can be in a vertical state under normal conditions to disengage from the engaged state.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. Anchor disc pull-out force test device, characterized in that: The invention comprises an engaging portion (400), wherein the engaging portion (400) comprises a ring sleeve (410) which is sleeved on the outside of the anchor bolt body (300), and at least two groups of grooves (420) are provided around the ring sleeve (410) in the circumferential direction. A bite claw (430) is rotatably connected in the groove (420), and a drive ring (440) is rotatably connected outside the ring sleeve (410). The drive ring (440) supports the free end of the bite claw (430) from the inside to the outside. When the drive ring (440) moves toward the rotation center of the bite claw (430), the bite end of the bite claw (430) is driven to rotate inward and occlude the anchor bolt body (300).

2. The anchor disc pullout resistance testing device according to claim 1, characterized in that: Both ends of the ring sleeve (410) are provided with biting claws (430), and the biting claws (430) on the two ends of the ring sleeve (410) are symmetrical to each other.

3. The anchor disc pullout resistance testing device according to claim 2, characterized in that: The biting end of the biting claw (430) has a sharp corner (431).

4. The anchor disc pullout resistance testing device according to claim 3, characterized in that: In the biting claw (430), the length of the end located above the rotation center is smaller than the length of the end located below the rotation center.

5. The anchor disc pullout resistance testing device according to claim 3, characterized in that: It comprises an outer frame (100), a support frame (500) is mounted on the outer frame (100), and the support frame (500) is connected around the middle of the ring sleeve (410).

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