Tool suitable for fatigue test of multi-model connecting rods

Abstract

The utility model relates to the technical field of fatigue test tools, in particular to a tool suitable for multi-model connecting rod fatigue test, which comprises a test clamping tool main body and a connecting rod, the test clamping tool main body is provided with an upper clamp body and a lower clamp body, and the lower end of the upper clamp body and the upper end of the lower clamp body are respectively provided with a groove. A small-head hole seat and a large-head hole seat are arranged at the two ends of the connecting rod respectively, upper clamping covers are symmetrically arranged on one side of the groove of the upper clamp body through linear cutting, and lower clamping covers are symmetrically arranged on one side of the groove of the lower clamp body through linear cutting. According to the tool suitable for the fatigue test of the multi-model connecting rods, the connecting rods are clamped and fixed through cooperation of the clamp body and the clamping cover, the clamp body and the clamping cover are machined in the mode that integrated machining is conducted and then linear cutting separation is conducted, the matched area is in a wedge shape, and therefore the clamp is better in cooperation, higher in integrity and more uniform in stress; and the stability of the connecting rod during fatigue test is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue test tooling, in particular to a tooling suitable for fatigue tests of multiple types of connecting rods. Background Art

[0002] The connecting rod fatigue test of marine engines is a key link to ensure their reliability and durability. The main purpose of this type of test is to evaluate the fatigue resistance of the connecting rod under long-term cyclic loads.

[0003] When the existing ship engine connecting rod is subjected to fatigue test, it is usually clamped and positioned by a tooling so that the connecting rod is fixed on the test equipment. For example, an anti-roll torsion bar system test device disclosed in publication number CN204612942U clamps the connecting rod by adjusting bolts. However, when the two ends of the ship engine connecting rod are clamped in the clamp, the loosening of the adjusting bolts may cause insufficient clamping force, thereby affecting the stability of the clamping. Utility Model Content

[0004] The purpose of the utility model is to provide a tool suitable for fatigue testing of connecting rods of various models, so as to solve the problem raised by the above-mentioned background technology that when the two ends of the connecting rod of a ship engine on the current market are clamped in the clamp, the clamping force is insufficient due to the loosening of the adjusting bolt, thereby affecting the stability of the clamping.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tool suitable for fatigue testing of multiple types of connecting rods, comprising a test clamping tool body and a connecting rod, the test clamping tool body is provided with an upper clamping body and a lower clamping body, and the lower end of the upper clamping body and the upper end of the lower clamping body are respectively provided with grooves, small head hole seats and large head hole seats are respectively provided at both ends of the connecting rod, and the small head hole seats and the large head hole seats are respectively arranged in the grooves of the upper clamping body and the lower clamping body, one side of the groove of the upper clamping body is symmetrically provided with an upper clamping cover through wire cutting, and a small head hole fixing pin is commonly clamped between the upper clamping cover and the upper clamping body, one side of the groove of the lower clamping body is symmetrically provided with a lower clamping cover through wire cutting, and a large head hole fixing pin is commonly clamped between the lower clamping cover and the lower clamping body.

[0006] Preferably, an upper connecting column with a threaded structure is inserted and fixed to the upper end of the upper clamp body, and a screw structure fixed to the upper connecting column passes through the side surface of the upper clamp body.

[0007] Preferably, the area where the upper clamping body and the upper clamping cover are mutually clamped is wedge-shaped, and the wedge-shaped areas of the upper clamping body and the upper clamping cover are respectively located above and below the fixing pin of the small head hole.

[0008] Preferably, a lower connecting column with a threaded structure is inserted and fixed to the lower end of the lower clamp body, and the lower connecting column is coaxial with the upper connecting column, and a screw structure fixed to the lower connecting column passes through the side surface of the lower clamp body.

[0009] Preferably, the area where the lower clamping body and the lower clamping cover are mutually engaged is also wedge-shaped, and the wedge-shaped areas of the lower clamping body and the lower clamping cover are also arranged above and below the fixing pin of the large head hole.

[0010] Preferably, the small-head hole fixing pin is plug-fitted with the small-head hole seat, and the large-head hole fixing pin is plug-fitted with the large-head hole seat.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the tooling suitable for fatigue testing of multiple types of connecting rods clamps and fixes the connecting rods through the cooperation of the clamping body and the clamping cover. The clamping body and the clamping cover are processed in an integrated manner and then separated by wire cutting. The matching area is wedge-shaped, so that the clamps match better, the integrity is higher, the force is more uniform, and the stability during fatigue testing of the connecting rods is improved. The tooling suitable for fatigue testing of multiple types of connecting rods can be used for fatigue testing of marine engine connecting rods with a center distance of large and small head holes of more than 240mm. When fixing the connecting rod, the small head hole seat and the large head hole seat of the connecting rod are respectively clamped and positioned by the upper and lower clamping bodies, and then the fixing pin shaft is respectively inserted into the large and small head hole seats, and then the fixing pin shaft is tightened by the clamping cover to ensure the overall stability for fatigue testing of the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of a tooling structure suitable for fatigue testing of multiple types of connecting rods of the utility model;

[0013] Figure 2 This is a side view of a tooling suitable for fatigue testing of multiple types of connecting rods of the utility model;

[0014] Figure 3 This is a front view of a tooling suitable for fatigue testing of multiple types of connecting rods of the utility model;

[0015] Figure 4 This is a side view of the connection between the lower clamping cover and the lower clamping body of a tooling suitable for fatigue testing of multiple types of connecting rods of the utility model;

[0016] Figure 5 The utility model is a top view of the connection between the lower clamping cover and the lower clamping body of a tool suitable for fatigue testing of multiple types of connecting rods.

[0017] In the figure: 1. Test clamping tool body; 2. Upper clamping body; 201. Upper connecting column; 202. Small head hole fixing pin; 203. Upper clamping cover; 3. Connecting rod; 301. Small head hole seat; 302. Large head hole seat; 4. Lower clamping body; 401. Lower connecting column; 402. Large head hole fixing pin; 403. Lower clamping cover. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-5The utility model provides a technical solution: a tool suitable for fatigue testing of multiple types of connecting rods, including a test clamping tool body 1 and a connecting rod 3, the test clamping tool body 1 is provided with an upper clamp body 2 and a lower clamp body 4, the upper end of the upper clamp body 2 is plugged and fixed with an upper connecting column 201 with a threaded structure, and the side of the upper clamp body 2 is penetrated with a screw structure fixed to the upper connecting column 201, this structure allows the upper clamp body 2 to be fixed to the test equipment through the upper connecting column 201, the lower end of the lower clamp body 4 is plugged and fixed with a lower connecting column 401 with a threaded structure, and the lower connecting column 401 is coaxial with the upper connecting column 201, and the side of the lower clamp body 4 is penetrated with a screw structure fixed to the lower connecting column 401, this structure allows the lower clamp body 4 to be fixed through the lower connecting column 401 On the test equipment, the positions of the upper clamp body 2 and the lower clamp body 4 are made to correspond to each other to ensure the stability of the clamping of the connecting rod 3, and grooves are respectively provided at the lower end of the upper clamp body 2 and the upper end of the lower clamp body 4, and a small head hole seat 301 and a large head hole seat 302 are respectively provided at both ends of the connecting rod 3, and the small head hole seat 301 and the large head hole seat 302 are respectively arranged in the grooves of the upper clamp body 2 and the lower clamp body 4, and the area where the upper clamp body 2 and the upper clamping cover 203 are mutually clamped is wedge-shaped, and the wedge-shaped areas of the upper clamp body 2 and the upper clamping cover 203 are respectively located above and below the small head hole fixing pin 202. This structure enables the upper clamp body 2 and the upper clamping cover 203 to have a higher degree of clamping fit between them by first integrally machining and then separating them by wire cutting. , the integrity is higher, and the force is more uniform, which improves the stable positioning of the upper clamp body 2 on the small head hole seat 301 at the upper end of the connecting rod 3, one side of the groove of the upper clamp body 2 is symmetrically provided with an upper clamping cover 203 through wire cutting, and the upper clamping cover 203 and the upper clamp body 2 are jointly clamped with a small head hole fixing pin 202, one side of the groove of the lower clamp body 4 is symmetrically provided with a lower clamping cover 403 through wire cutting, and the lower clamping cover 403 and the lower clamp body 4 are jointly clamped with a large head hole fixing pin 402, the area where the lower clamp body 4 and the lower clamping cover 403 are mutually clamped is also wedge-shaped, and the wedge-shaped areas of the lower clamp body 4 and the lower clamping cover 403 are also arranged above and below the large head hole fixing pin 402, this structure makes the lower clamp body 4 and the lower clamping cover 403 The upper clamping body 2 and the upper clamping cover 203 are also improved by the processing method of first integral processing and then wire cutting to improve the degree of clamping fit between the upper clamping body 2 and the upper clamping cover 203, so that the overall stability is higher and the force is more uniform, ensuring the stability of the large-head hole fixing pin 402, so that the large-head hole fixing pin 402 penetrates the large-head hole seat 302 to realize the positioning of the lower end of the connecting rod 3, and the upper clamping cover 203 and the lower clamping cover 403 are respectively fastened to the upper clamping body 2 and the lower clamping body 4 by bolts. At the same time, the upper clamping cover 203 and the lower clamping cover 403 are also fastened to the small-head hole fixing pin 202 and the large-head hole fixing pin 402 by bolts respectively, and the small-head hole fixing pin 202 is plugged into the small-head hole seat 301, and the large-head hole fixing pin 402 is plugged into the large-head hole seat 302.This structure enables the connecting rod 3 to be inserted into the groove of the lower clamp body 4 after the large head hole seat 302 is inserted into the large head hole seat 302, and then the large head hole fixing pin 402 is fastened by the clamping connection between the lower clamping cover 403 and the lower clamp body 4, so as to realize the tooling positioning of the lower end of the connecting rod 3. After the connecting rod 3 is inserted into the groove of the upper clamp body 2 at the small head hole seat 301, the small head hole fixing pin 202 is inserted into the small head hole seat 301, and the small head hole fixing pin 202 is fastened by the clamping connection between the upper clamping cover 203 and the upper clamp body 2, so as to realize the tooling positioning of the upper end of the connecting rod 3. The overall structure is simple, and the clamping is more convenient and stable. The small head hole fixing pin 202 and the large head hole fixing pin 402 can be used for the fatigue test positioning of the connecting rod of the ship engine with the center distance of the large and small head holes being more than 240mm.

[0020] Working principle: When using the tooling suitable for fatigue testing of multiple types of connecting rods, first, insert the small-head hole fixing pin 202 and the large-head hole fixing pin 402 into the small-head hole seat 301 and the large-head hole seat 302 of the connecting rod 3 respectively, and then insert the small-head hole seat 301 and the large-head hole seat 302 of the connecting rod 3 into the grooves of the upper clamp body 2 and the lower clamp body 4 respectively, and at the same time, the small-head hole fixing pin 202 and the large-head hole fixing pin 402 are respectively clamped into the upper clamp body 2 and the lower clamp body 4, and then the upper clamping cover 203 is clamped to the other side of the small-head hole fixing pin 202, and the upper clamping cover 203 and the upper clamping body 2 are fastened through the wedge-shaped area, and then the lower clamping cover 403 is clamped to the other side of the large-head hole fixing pin 402, and at the same time, the lower clamping cover 403 and the lower clamping The specific bodies 4 are also fastened by the wedge-shaped area, and the clamp body and the clamping cover are processed as a whole and then separated by wire cutting, so that the clamp can cooperate better, have higher integrity, and bear more uniform force. The upper clamp body 2 and the lower clamp body 4 are respectively fixed to the test equipment by the upper connecting column 201 and the lower connecting column 401. After the test clamping tool body 1 clamps the connecting rod 3 firmly through the upper clamp body 2 and the lower clamp body 4, the upper clamping cover 203 and the upper clamp body 2 and the small-head hole fixing pin 202 are fastened with bolts, and the lower clamping cover 403 and the lower clamp body 4 and the large-head hole fixing pin 402 are fastened with bolts. The test equipment can perform fatigue test processing on the connecting rod 3 through the test clamping tool body 1, thereby completing a series of work.

[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may 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 shall be included in the protection scope of the present invention.

Claims

1. A tool suitable for fatigue testing of connecting rods of various types, comprising a test clamping tool body (1) and a connecting rod (3), characterized in that: The test clamping tool body (1) is provided with an upper clamp body (2) and a lower clamp body (4), and grooves are respectively provided at the lower end of the upper clamp body (2) and the upper end of the lower clamp body (4), and the two ends of the connecting rod (3) are respectively provided with a small head hole seat (301) and a large head hole seat (302), and the small head hole seat (301) and the large head hole seat (302) are respectively arranged in the grooves of the upper clamp body (2) and the lower clamp body (4), one side of the groove of the upper clamp body (2) is symmetrically provided with an upper clamping cover (203) by wire cutting, and a small head hole fixing pin shaft (202) is commonly clamped between the upper clamping cover (203) and the upper clamp body (2), and one side of the groove of the lower clamp body (4) is symmetrically provided with a lower clamping cover (403) by wire cutting, and a large head hole fixing pin shaft (402) is commonly clamped between the lower clamping cover (403) and the lower clamp body (4).

2. A tooling suitable for fatigue testing of multiple types of connecting rods according to claim 1, characterized in that: An upper connecting column (201) with a threaded structure is inserted and fixed on the upper end of the upper clamp body (2), and a screw structure fixed to the upper connecting column (201) passes through the side surface of the upper clamp body (2).

3. The tooling suitable for fatigue testing of multiple types of connecting rods according to claim 1, characterized in that: The mutually clamped area between the upper clamp body (2) and the upper clamping cover (203) is wedge-shaped, and the wedge-shaped areas of the upper clamp body (2) and the upper clamping cover (203) are respectively located above and below the small head hole fixing pin shaft (202).

4. The tooling suitable for fatigue testing of multiple types of connecting rods according to claim 2, characterized in that: A lower connecting column (401) with a threaded structure is inserted and fixed at the lower end of the lower clamp body (4), and the lower connecting column (401) is coaxial with the upper connecting column (201), and a screw structure fixed to the lower connecting column (401) passes through the side of the lower clamp body (4).

5. The tooling suitable for fatigue testing of multiple types of connecting rods according to claim 3, characterized in that: The mutually clamped area between the lower clamp body (4) and the lower clamping cover (403) is also wedge-shaped, and the wedge-shaped area of ​​the lower clamp body (4) and the lower clamping cover (403) is also arranged above and below the large-head hole fixing pin shaft (402).

6. The tooling suitable for fatigue testing of multiple types of connecting rods according to claim 1, characterized in that: The small head hole fixing pin shaft (202) is plug-fitted with the small head hole seat (301), and the large head hole fixing pin shaft (402) is plug-fitted with the large head hole seat (302).

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