Large-tension casting head steel wire rope testing machine clamp
By using a hydraulically driven conical chuck and guide groove to clamp the wire rope, the problem of wire rope loosening in large-tonnage testing machines is solved, and reliable clamping of heavy-duty wire ropes is achieved. This method is suitable for wire rope fatigue load testing in large-tonnage testing machines.
Patent Information
- Application Number
- CN202423273353.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The wire rope clamping method of the existing large-tonnage testing machine has poor fixing effect, which can easily cause the wire rope to loosen during the test and affect the normal progress of the fatigue load test.
The steel wire rope is clamped by a hydraulically driven conical chuck and guide groove. The gradual clamping method of the conical casting head, combined with the stress dispersion of the clamping rod, ensures the reliability of the clamping force.
It achieves reliable clamping of heavy-duty wire ropes, preventing loosening, and is suitable for wire rope fatigue load testing on large-tonnage testing machines.
Smart Images
Figure CN223756467U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to steel wire rope testing machine clamp field especially relates to a big tension casting head steel wire rope testing machine clamp. BACKGROUND
[0002] Steel wire rope is the main building material of highway and bridge construction, and the safe fatigue life of steel wire rope directly affects the service life of the bridge. Fatigue load test on steel wire rope is an effective means to obtain the service life of steel wire rope. The fatigue test of heavy load type steel wire rope with large tension requires that the testing machine clamp has greater clamping force and better clamping method to meet the tension test of large tonnage testing machine and ensure that the large tension steel wire rope does not loosen during the test.
[0003] The common steel wire rope clamping method at present is slot sliding block direct clamping. The slot sliding block direct clamping method does not need extra components. When the slot sliding block clamps the steel wire rope, it relies on the groove on the inner surface to tightly bite the steel wire rope. This method is simple to operate and has low requirements for the clamp. However, this method requires more firm clamping force when clamping steel wire rope with large tension, or the clamping length is lengthened to improve the reliability of clamping. Therefore, this method is suitable for clamping steel wire rope with medium and low tension. In the tension test of large tonnage testing machine, the effect of fixed clamping is poor, which easily leads to loosening of the steel wire rope during the test, affecting the normal fatigue load test of steel wire rope with large tension. Therefore, a big tension casting head steel wire rope testing machine clamp is proposed to solve the above problems. UTILITY MODEL CONTENTS
[0004] In order to make up for the above shortcomings, the utility model provides a big tension casting head steel wire rope testing machine clamp, which aims to improve the problem in the prior art that "in the tension test of large tonnage testing machine, the effect of fixed clamping is poor, which easily leads to loosening of the steel wire rope during the test".
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a big tension casting head steel wire rope testing machine clamp, comprising a clamp main body, a hydraulic oil cylinder is fixedly connected to the surface of the clamp main body, a support block is fixedly connected to the inside of the clamp main body, a guide block is fixedly connected to the surface of the support block, an L-shaped guide plate is fixedly connected to the surface of the clamp main body, a clamping mechanism is arranged in the inside of the clamp main body, the clamping mechanism comprises a conical chuck, the conical chuck is hinged to the cylinder rod of the hydraulic oil cylinder, the number of the conical chucks is set to two groups, a conical clamping groove is arranged on the side of each of the two groups of conical chucks which are close to each other, and a clamp pull rod is fixedly connected to the surface of the clamp main body.
[0006] Further description of the above technical scheme:
[0007] The number of the hydraulic oil cylinders is set to two groups, and the two groups of hydraulic oil cylinders are symmetrically arranged on both sides of the clamp body.
[0008] As a further description of the above technical solution:
[0009] The straight line where the displacement direction of the cylinder rod of the hydraulic oil cylinder is located is arranged in an inclined state.
[0010] As a further description of the above technical solution:
[0011] The rear side of the conical chuck is provided with a guide groove two, and the guide block is matched with the guide groove two.
[0012] As a further description of the above technical solution:
[0013] The front side of the conical chuck is provided with a guide groove one, and the L-shaped guide plate is matched with the guide groove one.
[0014] As a further description of the above technical solution:
[0015] The support block is fixedly connected with the guide block through a fixing bolt.
[0016] As a further description of the above technical solution:
[0017] The clamp body is fixedly connected with the L-shaped guide plate through a fixing bolt.
[0018] As a further description of the above technical solution:
[0019] The two ends of the clamp pull rod are fixedly connected with the surface of the clamp body through fastening screws.
[0020] The utility model has the advantages of the following beneficial effects:
[0021] 1. In the utility model, two groups of conical chucks are close to each other to clamp the steel wire rope sample, and the tapered casting head of the steel wire rope is a gradually changing taper, so that the steel wire rope sample is tightly clamped in the two groups of conical chucks when the test force tightens the steel wire rope. The clamping force is reliable, the effective clamping distance of the sample is short, and the utility model is suitable for clamping the sample of heavy load type steel wire rope.
[0022] 2. In the utility model, the fastening screws lock the two ends of the clamp pull rod on both sides of the slotted bottom of the clamp body, so that the stress on the clamp body is dispersed, and the protection effect of preventing the clamp body from expanding and deforming outward is achieved. DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure in the utility model;
[0024] Figure 2It is the three-dimensional structure schematic view of the clamp main body in the utility model;
[0025] Figure 3 It is the three-dimensional structure schematic view of the two groups of conical chucks in the utility model;
[0026] Figure 4 It is the three-dimensional structure schematic view of the support block in the utility model;
[0027] Figure 5 It is the front plane structure schematic view of the whole in the utility model.
[0028] Legend:
[0029] 1, clamp main body, 2, hydraulic cylinder, 3, support block, 4, guide block, 5, fixed bolt, 6, conical chuck, 7, L-shaped guide plate, 8, clamp pull rod, 9, fastening screw, 10, conical clamping groove, 11, guide groove two, 12, guide groove one. Specific implementation
[0030] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.
[0031] Refer to Figure 1 , Figure 5 An embodiment provided by the utility model: a large-drawing-force casting head steel wire rope testing machine clamp, including clamp main body 1, the surface of clamp main body 1 is fixedly connected with hydraulic cylinder 2 for providing driving force, the number of hydraulic cylinder 2 is set to two groups, two groups of hydraulic cylinder 2 are symmetrically arranged on both sides of clamp main body 1, the straight line where the cylinder rod displacement direction of hydraulic cylinder 2 is arranged in an inclined state, hydraulic cylinder 2 works to push conical chuck 6 to clamp the steel wire rope sample.
[0032] Refer to Figure 4 , Figure 5 The inside of clamp main body 1 is fixedly connected with support block 3, the surface of support block 3 is fixedly connected with guide block 4, support block 3 is fixedly connected with guide block 4 through fixed bolt 5, guide block 4 needs to be fixed on a plane, so support block 3 is provided with a plane that cooperates with guide block 4, the other side of support block 3 is provided with a curved surface that cooperates with the inside of clamp main body 1, the rear side of conical chuck 6 is provided with guide groove two 11, guide block 4 cooperates with guide groove two 11.
[0033] Refer to Figure 1 , Figure 5An L-shaped guide plate 7 is fixedly connected to the surface of the fixture body 1. The fixture body 1 is fixedly connected to the L-shaped guide plate 7 by fixing bolts 5. A guide groove 12 is provided on the front side of the conical chuck 6. The L-shaped guide plate 7 and the guide groove 12 cooperate with each other to prevent the conical chuck 6 from rotating inconveniently for installing the wire rope sample.
[0034] Reference Figure 1 - Figure 3 The fixture body 1 is equipped with a clamping mechanism, which includes a conical chuck 6. The inner surface of the fixture body 1 and the outer surface of the conical chuck 6 are both conical surfaces that cooperate with each other. The conical chuck 6 is hinged to the cylinder rod of the hydraulic cylinder 2. The hinged connection can prevent the hydraulic cylinder 2 from being subjected to bending radial force, thus protecting the hydraulic cylinder 2. The number of conical chucks 6 is set to two sets. On the side of the two sets of conical chucks 6 that are close to each other, there is a conical clamping groove 10. The inner wall of the conical clamping groove 10 is set as a conical curved surface, which cooperates with the wire rope casting head on the surface of the wire rope to increase the force-bearing area. The clamping force of the fixture of this testing machine is generated by the two sets of symmetrically arranged conical chucks 6 sliding to the designated position in the conical groove of the fixture body 1 and being accompanied by the tension of the wire rope. The clamping principle is that the movable conical chucks 6 are symmetrically arranged in the conical groove of the fixture body 1 and move close to each other to clamp the intermediate sample.
[0035] Reference Figure 1 , Figure 2 , Figure 5 A clamping rod 8 is fixedly connected to the surface of the clamp body 1. Both ends of the clamping rod 8 are fixedly connected to the surface of the clamp body 1 by fastening screws 9. In order to facilitate the installation of the wire rope sample, a slot is provided at the bottom of the clamp body 1. If this position is not reinforced after the sample is installed, the clamp body 1 will crack. Therefore, the clamping rod 8 is locked on both sides of the slot at the bottom of the clamp body 1 to disperse the stress on the clamp body 1 and make the clamping rod 8 bear greater tension.
[0036] Working principle: When in use, this device is installed on a large-tonnage pulse fatigue testing machine. Before the test, the wire rope casting head on the surface of the wire rope sample needs to be installed between two sets of conical chucks 6. The two sets of conical chucks 6 are in a separated state. At this time, the cylinder rod of the hydraulic cylinder 2 retracts, driving the conical chucks 6 to move to the left, so that the opening of the conical clamping groove 10 between the two sets of conical chucks 6 is large enough to install the wire rope casting head.
[0037] When the steel wire rope sample is placed in the center position between the two sets of conical clamping heads 6, the hydraulic cylinders 2 arranged symmetrically inside the clamp body 1 work to push the conical clamping heads 6 along the conical slide way processed inside the conical clamping heads 6 to the right, so that the two sets of conical clamping heads 6 tightly hold the steel wire rope casting head, the front and back sides of the conical clamping heads 6 are respectively provided with guide groove two 11 and guide groove one 12, through the mutual cooperation of the guide block 4 and the guide groove two 11 and the mutual cooperation of the L-shaped guide plate 7 and the guide groove one 12, the rotation of the conical clamping heads 6 inside the clamp body 1 is prevented.
[0038] When the conical clamping heads 6 completely match the steel wire rope casting head, the clamping action is completed at this time, and with the pulling of the steel wire rope in the experiment, due to the moving principle of the wedge-shaped sliding block in the conical groove, the steel wire rope casting head is slowly locked inside the clamp body 1, at this time the clamp body 1 starts to be slowly tensioned by the conical clamping heads 6, due to the increase of the tensioning force, the slotted part at the bottom of the clamp body 1 deforms, in order to prevent this deformation from causing the clamp body 1 to crack, the clamp pull rod 8 is fixed at the bottom of the clamp body 1 through the tightening screw 9, which plays a protective role of preventing the clamp body 1 from expanding and deforming outward.
[0039] After the test is completed, because the steel wire rope casting head is locked inside the conical clamping heads 6 due to the large pulling force of the steel wire rope, a large pushing force is required to push the conical clamping heads 6 along the clamp body 1, the conical clamping heads 6 are displaced through the work of the hydraulic cylinders 2, so that the conical clamping heads 6 are withdrawn from the conical groove of the clamp body 1.
[0040] Finally, it should be pointed out that: the above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A large pull casting head steel wire rope tester clamp, comprising a clamp body (1), characterized in that: The surface of the clamping body (1) is fixedly connected with a hydraulic oil cylinder (2), the inside of the clamping body (1) is fixedly connected with a supporting block (3), the surface of the supporting block (3) is fixedly connected with a guide block (4), the surface of the clamping body (1) is fixedly connected with an L-shaped guide plate (7), the inside of the clamping body (1) is provided with a clamping mechanism, the clamping mechanism comprises a conical chuck (6), the conical chuck (6) is hinged to the cylinder rod of the hydraulic oil cylinder (2), the number of the conical chuck (6) is two groups, the side, which is close to each other, of the two groups of conical chucks (6) is provided with a conical clamping groove (10), and the surface of the clamping body (1) is fixedly connected with a clamping pull rod (8).
2. A large pull casting head wire rope tester clamp according to claim 1, characterized in that: The number of the hydraulic oil cylinder (2) is two groups, and the two groups of hydraulic oil cylinders (2) are symmetrically arranged on the two sides of the clamping body (1).
3. A large pull casting head wire rope tester clamp according to claim 2, characterized in that: The straight line, in which the displacement direction of the cylinder rod of the hydraulic oil cylinder (2) is located, is arranged in an inclined state.
4. A large pull casting head wire rope tester clamp according to claim 1, characterized in that: The rear side of the conical chuck (6) is provided with a guide groove two (11), and the guide block (4) is matched with the guide groove two (11).
5. A large pull casting head wire rope tester clamp according to claim 1, characterized in that: The front side of the conical chuck (6) is provided with a guide groove one (12), and the L-shaped guide plate (7) is matched with the guide groove one (12).
6. A large pull casting head wire rope tester clamp according to claim 1, characterized in that: The supporting block (3) is fixedly connected with the guide block (4) through a fixing bolt (5).
7. A large pull casting head wire rope tester clamp according to claim 1, characterized in that: The clamping body (1) is fixedly connected with the L-shaped guide plate (7) through a fixing bolt (5).
8. A large pull casting head wire rope tester clamp according to claim 1, characterized in that: The two ends of the clamping pull rod (8) are fixedly connected with the surface of the clamping body (1) through fastening screws (9).