Pin plate sample tension fatigue clamp for full-temperature environment
By designing a simplified clamping mechanism and protective cover, the problems of difficulty and safety hazards of traditional fatigue fixtures for pin plate samples of different sizes are solved, and a low-cost and efficient fixture design is achieved, ensuring the accuracy and operation of the test Safety.
Patent Information
- Application Number
- CN202420048974.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-01-09
AI Technical Summary
Traditional fatigue fixtures have complex structures and high cost, making it difficult to effectively clamp pin plate samples of different shapes and sizes, especially in full temperature environments.
A pin plate sample pull fatigue fixture including a clamping rod, a fixing mechanism and a protective cover is designed, and a limiting assembly and support mechanism of a cylindrical pin and an opening pin are used to connect the clamping through elastic wedges and springs. Process and prevent debris from splashing through transparent protective covers and rotating blocks.
It realizes fast and easy clamping of pin plate samples of different sizes, reduces costs, and protects operators from debris through protective covers, improving the safety and accuracy of the test.
Smart Images
Figure CN222299335U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical clamps, in particular to a pin-plate sample pulling fatigue clamp used in a full-temperature environment. Background Art
[0002] A fatigue fixture is a tool for testing material properties and durability under fatigue loading. It is one of the indispensable equipment in fatigue testing. It is mainly used to clamp the test material to prevent the test material from shifting during loading. At the same time, it can also meet the test requirements of test materials of different shapes and sizes. Therefore, the design of the fatigue fixture is very critical. Generally, it is necessary to consider a variety of factors such as test requirements, test environment, test equipment, and characteristics of test materials. For traditional fatigue fixtures, their structure is complex and the cost is high. At the same time, they have high requirements on the shape and size of the specimen.
[0003] In order to meet the above requirements, a flexible adjustable fixture for fatigue performance testing of curved plate specimens disclosed in Chinese patent publication number CN216525135U has been developed to achieve fatigue testing of specimens of different thicknesses. Another example is a flexible strip specimen fatigue testing fixture disclosed in Chinese patent publication number CN216718010U, which ensures the reliability of specimen fixation during the test. Both have improved the fatigue fixture to a certain extent, but the designed fatigue fixture has a complex structure and a high cost. Therefore, there is an urgent need to find a fixture with a simple structure, low cost and capable of performing tensile fatigue testing on pin-plate specimens of different shapes and sizes. Utility Model Content
[0004] In order to make up for the above shortcomings, the utility model provides a pin-plate specimen tensile fatigue clamp for use in a full-temperature environment, aiming to improve the problems in the prior art of complex structure, difficult fixing method, and inability to clamp pin-plate specimens of different sizes.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a pin-plate specimen tensile fatigue fixture for full-temperature environment, comprising a clamping rod, the outer wall of the clamping rod is slidably connected with a protective cover, the outer wall of the right end of the protective cover is rotatably connected with a connecting mechanism, the outer wall of the right end of the clamping rod is provided with a fixing mechanism, and the fixing mechanism comprises a cylindrical pin;
[0006] A limiting assembly is provided on the inner wall of the right end of the cylindrical pin, and the outer wall of the right end of the cylindrical pin is clamped with a cylindrical pin fixing seat through the limiting assembly. A clamping groove A is provided on the outer wall of the cylindrical pin fixing seat, and a supporting mechanism is provided on the inner and outer walls of the right end of the clamping rod. A pin plate sample is detachably installed on the outer wall of the right end of the clamping rod.
[0007] As a further description of the above technical solution:
[0008] The limiting assembly comprises two groups of wedge blocks, and the outer walls of the two groups of wedge blocks are elastically connected by springs.
[0009] As a further description of the above technical solution:
[0010] The support mechanism includes a split pin;
[0011] The outer wall of the bottom end of the cotter pin is clamped with a cotter pin fixing seat through a limiting component, and a clamping groove B is formed on the outer wall of the cotter pin fixing seat.
[0012] As a further description of the above technical solution:
[0013] The connecting mechanism includes a rotating block;
[0014] A sliding groove is provided on the inner wall of the right end of the rotating block, and a protrusion is fixedly connected to the outer wall of the right end of the rotating block.
[0015] As a further description of the above technical solution:
[0016] The cylindrical pin passes through the outer wall of the right end of the clamping rod, the cylindrical pin fixing seat is fixedly connected to the outer wall of the right end of the clamping rod, and the cylindrical pin contacts the outer wall of the pin plate sample.
[0017] As a further description of the above technical solution:
[0018] The cotter pin passes through the outer wall of the right end of the clamping rod, the outer wall of the cotter pin fixing seat is fixedly connected to the outer wall of the right end of the clamping rod, and the cotter pin contacts the outer wall of the pin plate sample.
[0019] As a further description of the above technical solution:
[0020] The wedge block is engaged with the slot A, the wedge block is engaged with the slot B, and the wedge block is slidably connected with the inner wall of the cylindrical pin.
[0021] The utility model has the following beneficial effects:
[0022] 1. In the utility model, the cylindrical pin and the cylindrical pin fixing seat, the cotter pin and the cotter pin fixing seat can be fixed by the limiting component, so that the pin plate sample can be clamped and fixed, and there is no need to fix the cylindrical pin and the cotter pin by turning the bolts multiple times, which is more convenient and quick. The device has a simple structure and low cost, and can adapt to pin plate samples of different sizes and specifications, and has higher adaptability.
[0023] 2. In the utility model, by rotating the rotating block and sliding the protrusion inside the slide groove, the protective covers are connected to each other, so that the device can be protected to avoid the problem of debris splashing and causing harm to the operator when the pin plate sample breaks. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic diagram of the main structure of a pin-plate specimen tensile fatigue fixture for use in a full-temperature environment proposed by the utility model;
[0025] Figure 2 This is a schematic diagram of the structure of the pin-plate specimen tension fatigue fixture fixing mechanism, support mechanism, clamping rod, and pin-plate specimen after decomposition, which is proposed by the utility model and is used in a full-temperature environment;
[0026] Figure 3 This is a schematic diagram of the structure of a limit assembly of a pin-plate specimen tensile fatigue fixture for use in a full-temperature environment proposed by the utility model;
[0027] Figure 4 This is a schematic diagram of the structure of a protective cover and a connecting mechanism of a pin-plate specimen tensile fatigue fixture for use in a full-temperature environment proposed by the utility model;
[0028] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of a protective cover and a connecting mechanism of a pin-plate specimen tensile fatigue fixture for use in a full-temperature environment.
[0029] Legend:
[0030] 1. Clamping rod; 2. Fixing mechanism; 201. Cylindrical pin; 202. Cylindrical pin fixing seat; 203. Slot A; 3. Support mechanism; 301. Split pin; 302. Split pin fixing seat; 303. Slot B; 4. Pin plate specimen; 5. Protective cover; 6. Connecting mechanism; 601. Bump; 602. Slide groove; 603. Rotating block; 7. Limiting assembly; 701. Spring; 702. Wedge block. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] Reference Figure 1The utility model provides an embodiment: a pin plate specimen tensile fatigue fixture for full temperature environment, including a clamping rod 1, the material of the clamping rod 1 is 3Cr13, the clamping rod 1 can be clamped by the hydraulic clamp of the electro-hydraulic servo fatigue testing machine, and the pin plate specimen 4 to be tested can be fixed between two groups of clamping rods 1 for tensile fatigue testing, the outer wall of the clamping rod 1 is slidably connected with a protective cover 5, the protective cover 5 is made of transparent material, when the protective covers 5 are connected, the operator can observe the state of the pin plate specimen 4 through the protective cover 5, and when the pin plate specimen 4 breaks during the test, the debris is prevented from splashing and causing harm to the operator.
[0033] Reference Figure 4-Figure 5 The right end outer wall of the protective cover 5 is rotatably connected with a connecting mechanism 6. By rotating the connecting mechanism 6, the two groups of protective covers 5 can be connected. The connecting mechanism 6 includes a rotating block 603. The rotating block 603 is made of transparent material, which is convenient for the operator to observe the state of the pin plate sample 4. A sliding groove 602 is opened on the right end inner wall of the rotating block 603. A protrusion 601 is fixedly connected to the right end outer wall of the rotating block 603. The protrusion 601 can be aligned with the opening of the sliding groove 602, and the protrusion 601 can be inserted into the sliding groove 602. Then the rotating block 603 is rotated to connect the two groups of protective covers 5.
[0034] Reference Figure 2-Figure 3 A fixing mechanism 2 is provided on the outer wall of the right end of the clamping rod 1. The fixing mechanism 2 is arranged horizontally and can fix the pin plate sample 4 and the clamping rod 1. The fixing mechanism 2 includes a cylindrical pin 201. The cylindrical pin 201 passes through the clamping rod 1 and the pin plate sample 4. A limiting component 7 is provided on the inner wall of the right end of the cylindrical pin 201. The cylindrical pin 201 can be fixed to the cylindrical pin fixing seat 202 through the limiting component 7. The limiting component 7 includes two groups of wedge blocks 702. The wedge blocks 702 are symmetrically distributed on the inner walls on both sides of the cylindrical pin 201. The wedge blocks 702 are slidably connected to the inner wall of the cylindrical pin 201. The outer walls of the two groups of wedge blocks 702 are elastically connected by springs 701. When the cylindrical pin 201 is installed, the cylindrical pin 201 can be inserted along the inner walls of the clamping rod 1 and the pin plate sample 4. The two groups of wedge blocks 702 are moved toward the middle along the inner wall of the cylindrical pin 201 under the extrusion force.
[0035] Reference Figure 2The right end outer wall of the cylindrical pin 201 is clamped with a cylindrical pin fixing seat 202 through a limiting component 7. The cylindrical pin 201 can be inserted into the cylindrical pin fixing seat 202 and fixed by the limiting component 7. The cylindrical pin 201 passes through the right end outer wall of the clamping rod 1. The cylindrical pin fixing seat 202 is fixedly connected to the right end outer wall of the clamping rod 1. The cylindrical pin 201 contacts the outer wall of the pin plate specimen 4. When the cylindrical pin 201 needs to be removed, the two sets of wedge blocks 702 can be pressed inward to disengage the outer wall of the wedge block 702 from the slot A203, and the cylindrical pin 201 can be pulled outward to be removed. The outer wall of the cylindrical pin fixing seat 202 is provided with a slot A203, and the wedge block 702 is clamped with the slot A203, so that the cylindrical pin 201 can be fixed and the pin plate specimen 4 and the clamping rod 1 are fixed.
[0036] Reference Figure 2 A supporting mechanism 3 is provided on the inner and outer walls of the right end of the clamping rod 1. The supporting mechanism 3 is vertically arranged. The supporting mechanism 3 includes a cotter pin 301. The cotter pin 301 limits the pin plate sample 4 through its slot. The slot of the cotter pin 301 is clearance-matched with the pin plate sample 4, and the width of the slot can be changed by replacing the cotter pin 301, so that the pin plate samples 4 of different thicknesses can be tested. The outer wall of the bottom end of the cotter pin 301 is clamped with a cotter pin fixing seat 302 through a limiting component 7, and the cotter pin 301 can be fixed in the cotter pin fixing seat 302 through the limiting component 7.
[0037] Reference Figure 2 The cotter pin 301 passes through the outer wall of the right end of the clamping rod 1, and the cotter pin 301 contacts the outer wall of the pin plate sample 4, so that the pin plate sample 4 can be fixed in the clamping rod 1 for limiting, avoiding its movement during the test, and ensuring the accuracy of the tensile fatigue test results. The outer wall of the cotter pin fixing seat 302 is fixedly connected with the outer wall of the right end of the clamping rod 1. The cotter pin 301 can be inserted into the clamping rod 1 and the cotter pin fixing seat 302 for fixing, and then the pin plate sample 4 is inserted into the open groove for limiting, and the cotter pin A slot B303 is provided on the outer wall of the fixing seat 302, and the wedge block 702 is engaged with the slot B303. When the cotter pin 301 needs to be replaced, the two sets of wedge blocks 702 can be pressed to disengage the wedge blocks 702 from the slot B303, thereby releasing the limit of the cotter pin 301 and removing the cotter pin 301 for replacement. The pin plate specimen 4 is detachably mounted on the outer wall of the right end of the clamping rod 1, and the pin plate specimen 4 can be fixed and limited by the fixing mechanism 2 and the supporting mechanism 3, so that the pin plate specimen 4 can be subjected to a tensile fatigue test.
[0038] Working principle: When in use, the operator can first select a suitable cotter pin 301 according to the thickness of the pin plate sample 4, and then insert the cotter pin 301 into the clamping rod 1, so that the wedge block 702 is squeezed and moves toward the middle along the inner wall of the cotter pin 301. When the cotter pin 301 moves to the position corresponding to the position of the wedge block 702 and the slot B303, the wedge block 702 pops outward due to the elastic force of the spring 701 itself, and engages with the slot B303, thereby limiting the cotter pin 301 and preventing it from moving under force during the test, thereby ensuring the accuracy of the test results.
[0039] Then, insert the pin plate sample 4 along the open groove on the cotter pin 301, so that the hole on the pin plate sample 4 corresponds to the position of the through groove on the clamping rod 1. At this time, insert the cylindrical pin 201 into the interior of the clamping rod 1 along the through groove, so that the wedge block 702 is squeezed and moves toward the middle along the inner wall of the cylindrical pin 201. When the cylindrical pin 201 moves to the position corresponding to the wedge block 702 and the slot A203, the wedge block 702 pops out due to the elastic force of the spring 701 itself and engages with the slot A203, so that the cylindrical pin 201 can be fixed. At this time, the cylindrical pin 201 passes through the pin plate sample 4 and the clamping rod 1, so that the pin plate sample 4 can be fixed.
[0040] At this time, the operator can make the positions of the two groups of clamping rods 1 correspond, and then move the two groups of protective covers 5 to the middle at the same time, so that the protrusion 601 corresponds to the opening position of the slide groove 602, insert the protrusion 601 into the slide groove 602, and rotate the rotating block 603 to make the protrusion 601 rotate along the inner wall of the slide groove 602. When the protrusion 601 rotates to the inside of the slide groove 602, the two groups of protective covers 5 can be fixed. At this time, the two groups of clamping rods 1 can be clamped by the hydraulic clamp of the electro-hydraulic servo fatigue testing machine, and the two groups of clamping rods 1 are pulled to both sides to perform a tensile fatigue test. Because the rotating block 603 and the protective cover 5 are in a transparent state, the operator can observe the state of the pin plate specimen 4, and the protective cover 5 can prevent debris from splashing when the pin plate specimen 4 breaks, protecting the operator from injury.
[0041] When the test of a group of pin plate specimens 4 is completed, the operator can first remove the clamping rod 1, then rotate the rotating block 603 in the opposite direction to make the protrusion 601 correspond to the opening position of the slide groove 602, move the two groups of protective covers 5 to both sides, and then press the two groups of wedge blocks 702 inside the cylindrical pin 201 to make them disengage from the slot A203, pull the cylindrical pin 201 outward and remove it, and then take the pin plate specimen 4 out of the clamping rod 1. When it is necessary to replace the cotter pin 301 according to the thickness of the pin plate specimen 4, press the two groups of wedge blocks 702 set at the bottom end of the cotter pin 301 to make the wedge block 702 disengage from the slot B303, so as to release the limit of the cotter pin 301 and remove the cotter pin 301 for replacement. There is no need to fix the pin plate specimen 4 by rotating the bolts multiple times, which is more convenient, quick, time-saving and labor-saving.
[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A pin-plate specimen tensile fatigue fixture for use in a full temperature environment, comprising a clamping rod (1), characterized in that: The outer wall of the clamping rod (1) is slidably connected to a protective cover (5), the outer wall of the right end of the protective cover (5) is rotatably connected to a connecting mechanism (6), and the outer wall of the right end of the clamping rod (1) is provided with a fixing mechanism (2), and the fixing mechanism (2) includes a cylindrical pin (201); The right inner wall of the cylindrical pin (201) is provided with a limiting assembly (7), the right outer wall of the cylindrical pin (201) is clamped with a cylindrical pin fixing seat (202) through the limiting assembly (7), the outer wall of the cylindrical pin fixing seat (202) is provided with a clamping groove A (203), the right inner wall and outer wall of the clamping rod (1) are provided with a supporting mechanism (3), and the right outer wall of the clamping rod (1) is detachably mounted with a pin plate sample (4).
2. A pin-plate specimen tensile fatigue fixture for use in a full-temperature environment according to claim 1, characterized in that: The limiting assembly (7) comprises two groups of wedge blocks (702), and the outer walls of the two groups of wedge blocks (702) are elastically connected via springs (701).
3. The pin-plate specimen tensile fatigue fixture for full temperature environment according to claim 1, characterized in that: The supporting mechanism (3) comprises a split pin (301); The outer wall of the bottom end of the cotter pin (301) is clamped with a cotter pin fixing seat (302) through a limiting assembly (7), and a clamping groove B (303) is formed on the outer wall of the cotter pin fixing seat (302).
4. The pin-plate specimen tensile fatigue fixture for full temperature environment according to claim 1 is characterized by: The connecting mechanism (6) comprises a rotating block (603); The inner wall at the right end of the rotating block (603) is provided with a sliding groove (602), and the outer wall at the right end of the rotating block (603) is fixedly connected with a protrusion (601).
5. The pin-plate specimen tensile fatigue fixture for full temperature environment according to claim 2, characterized in that: The cylindrical pin (201) passes through the right end outer wall of the clamping rod (1), the cylindrical pin fixing seat (202) is fixedly connected to the right end outer wall of the clamping rod (1), and the cylindrical pin (201) contacts the outer wall of the pin plate sample (4).
6. The pin-plate specimen tensile fatigue fixture for full temperature environment according to claim 3, characterized in that: The cotter pin (301) passes through the outer wall of the right end of the clamping rod (1), the outer wall of the cotter pin fixing seat (302) is fixedly connected to the outer wall of the right end of the clamping rod (1), and the cotter pin (301) contacts the outer wall of the pin plate sample (4).
7. The pin-plate specimen tensile fatigue fixture for full temperature environment according to claim 2, characterized in that: The wedge block (702) is engaged with the slot A (203), the wedge block (702) is engaged with the slot B (303), and the wedge block (702) is slidably connected with the inner wall of the cylindrical pin (201).