A coaxiality adjustment mechanism

Abstract

This utility model discloses a coaxiality adjustment mechanism, belonging to the field of coaxiality adjustment technology. It includes a connecting rod and an adjusting cylinder, with a connecting plate fixedly connected to the bottom of the adjusting cylinder. The bottom of the connecting rod has a first spherical surface, and the adjusting cylinder contains a first adjusting ring that is in contact with the first spherical surface. Four sets of adjusting studs are threaded to the side wall of the adjusting cylinder, and these studs are evenly distributed circumferentially. By cooperating with the first spherical surface and then using the adjusting studs for positioning, the coaxiality adjustment is achieved. This purely mechanical structure avoids damage to electronic components during long-term operation, especially during vibrations caused by the breakage of the sample. The purely mechanical structure reduces the failure rate, thus achieving long-term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of coaxiality adjustment technology, and in particular to a coaxiality adjustment mechanism. Background Technology

[0002] In mechanical equipment or construction projects, in order to verify the safety of the materials used, such as whether metal parts or concrete meet safety requirements, it is generally necessary to make a sample piece using the same material first, and then test its safety performance.

[0003] For example, when testing the tensile strength of a specimen using a tensile testing machine, and then directly fixing the specimen onto the machine, the direction of the force applied by the specimen and the tensile testing machine may deviate due to errors in the installation process. In this case, the specimen will not only bear a simple tensile force, but also a shear force, which will lead to inaccurate test data.

[0004] Therefore, in order to improve the reliability of test data during the testing of specimens, a coaxiality adjustment mechanism is generally installed on the tensile testing machine. The coaxiality adjustment mechanism ensures that the specimen and the force applied by the tensile testing machine are exactly on the same straight line.

[0005] However, the existing coaxiality adjustment mechanisms on the market are generally electronically adjusted rather than purely mechanical. This means that during long-term operation, especially during vibrations caused by the breaking of the sample, the electronic components are easily damaged, making it impossible to work for extended periods. Utility Model Content

[0006] The purpose of this invention is to solve the technical problem that in the prior art, the adjustment is generally electronic rather than purely mechanical, which makes it easy for electronic components to be damaged during long-term operation, especially during the vibration caused by the breaking of the sample, thus preventing long-term operation. Therefore, a coaxiality adjustment mechanism is proposed.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A coaxiality adjustment mechanism includes a connecting rod and an adjusting cylinder. A connecting plate is fixedly connected to the bottom of the adjusting cylinder. The bottom of the connecting rod is provided with a first spherical surface. A first adjusting ring is provided inside the adjusting cylinder, and the first adjusting ring is in contact with the first spherical surface. Four sets of adjusting studs are threadedly connected to the side wall of the adjusting cylinder, and the four sets of adjusting studs are evenly distributed circumferentially.

[0009] Preferably, each set of adjusting studs has two designs.

[0010] Preferably, the adjusting cylinder has a partition surface inside, and the top of the first adjusting ring is in contact with the lower surface of the partition surface.

[0011] Preferably, a snap-fit ​​ring is slidably connected to the connecting rod, a second adjusting ring is provided on the upper surface of the partition surface, and a second spherical surface is provided on the top of the second adjusting ring; the second spherical surface is in contact with the lower surface of the snap-fit ​​ring; the adjusting stud is a two-layer design.

[0012] Preferably, a first adjusting ring and a second adjusting ring are slidably connected on the connecting rod; the first adjusting ring and the second adjusting ring are both made of spiral surfaces and are in contact with each other.

[0013] Preferably, the bottom of the first adjusting ring is provided with a snap-fit ​​groove, and the upper surface of the snap-fit ​​ring is snapped into the snap-fit ​​groove.

[0014] Preferably, the bottom of the connecting plate is provided with a connecting post.

[0015] Preferably, a top ring is fixedly connected to the end of the connecting rod away from the connecting disc.

[0016] Compared with the prior art, the present invention provides a coaxiality adjustment mechanism, which has the following advantages:

[0017] This coaxiality adjustment mechanism achieves coaxiality adjustment by having a first adjusting ring cooperate with a first spherical surface and then adjusting a stud for limiting. It adopts a purely mechanical structure, which avoids the scenario of electronic components being damaged during long-term operation, especially during vibrations caused by the breaking of the sample. By using a purely mechanical structure, the failure rate is reduced, thereby achieving long-term stable operation. Attached Figure Description

[0018] Figure 1 This utility model provides a structural schematic diagram of a coaxiality adjustment mechanism. Figure 1 ;

[0019] Figure 2 This utility model provides a structural schematic diagram of a coaxiality adjustment mechanism. Figure 2 ;

[0020] Figure 3 This is a partial cross-sectional view of a coaxiality adjustment mechanism proposed in this utility model;

[0021] Figure 4 A partial explosion of a coaxiality adjustment mechanism proposed in this utility model Figure 1 ;

[0022] Figure 5 A partial explosion of a coaxiality adjustment mechanism proposed in this utility model Figure 2 .

[0023] In the diagram: 1. Connecting rod; 101. Connecting disc; 102. Connecting post; 2. Adjusting cylinder; 201. Adjusting stud; 202. Partition surface; 3. First spherical surface; 301. First adjusting ring; 4. Second adjusting ring; 401. Second spherical surface; 5. Snap-fit ​​ring; 6. First adjusting fixing ring; 601. Second adjusting fixing ring; 602. Snap-fit ​​groove; 7. Helical surface; 8. Top ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example:

[0027] like Figures 1-5 A coaxiality adjustment mechanism includes a connecting rod 1 and an adjusting cylinder 2. Both the connecting rod 1 and the adjusting cylinder 2 are rotating parts. A connecting plate 101 is fixedly connected to the bottom of the adjusting cylinder 2. The connecting plate 101 is fixed to the bottom of the adjusting cylinder 2 by screws.

[0028] The bottom of the connecting rod 1 is provided with a first spherical surface 3, which protrudes upward. The adjusting cylinder 2 is provided with a first adjusting ring 301, which is sleeved on the connecting rod 1 and has a gap of 5-10 mm. The first adjusting ring 301 is in contact with the first spherical surface 3, and the bottom of the first adjusting ring 301 is a spherical concave surface that fits with the first spherical surface 3.

[0029] The side wall of the adjusting cylinder 2 is threaded with four sets of adjusting studs 201. The four sets of adjusting studs 201 are evenly distributed in a circular pattern and can abut against the side wall of the first adjusting ring 301.

[0030] The adjusting stud 201 extends out of the outer wall of the adjusting cylinder 2 and has an internal hexagonal hole.

[0031] The bottom of the connecting plate 101 is provided with a connecting post 102, and the connecting post 102 is provided with a through hole. The connecting post 102 and the connecting plate 101 are integrally formed.

[0032] There is a gap of 3-8 mm between the bottom of the connecting rod 1 and the connecting plate 101 to avoid mutual interference when adjusting the coaxiality.

[0033] During installation, the connecting rod 1 is connected to the output end of the tensile testing machine, and the connecting plate 101 is connected to the sample piece, specifically through the connecting column 102. Before testing, by rotating the four sets of adjusting studs 201 that are evenly distributed on the side wall of the adjusting cylinder 2, the relative position of the first adjusting ring 301 in the adjusting cylinder 2 is pushed, thereby driving the adjusting cylinder 2 to move together, so as to achieve the purpose of adjusting the coaxiality.

[0034] Then rotate the four sets of adjusting studs 201 to limit the first adjusting ring 301 and prevent displacement.

[0035] The spherical surface design allows the first adjusting ring 301 to fit more tightly with the first spherical surface 3, preventing the connecting plate 101 from shifting unexpectedly during testing.

[0036] The first adjusting ring 301 cooperates with the first spherical surface 3, and then the adjusting stud 201 is used for limiting, so as to achieve the purpose of coaxiality adjustment. The pure mechanical structure avoids the scenario of electronic components being damaged during long-term operation, especially during the vibration caused by the sample being pulled apart. The pure mechanical structure reduces the failure rate and thus achieves long-term stable operation.

[0037] like Figures 1-2 Each set of adjusting studs 201 has two designs, that is, there are eight adjusting studs 201 arranged in pairs around the circumference.

[0038] The first adjusting ring 301 is limited by eight adjusting studs 201, which further improves stability and prevents the first adjusting ring 301 from being displaced unexpectedly.

[0039] like Figure 3 The adjusting cylinder 2 has a partition surface 202 inside, and a through hole in the middle of the partition surface 202. The connecting rod 1 passes through the through hole and has a gap. The top of the first adjusting ring 301 is in contact with the lower surface of the partition surface 202.

[0040] The first adjusting ring 301 is limited by the partition surface 202 to prevent it from falling off.

[0041] like Figure 3 A locking ring 5 is slidably connected to the connecting rod 1. A second adjusting ring 4 is provided on the upper surface of the partition surface 202. A second spherical surface 401 is provided on the top of the second adjusting ring 4. A spherical concave surface is provided on the lower surface of the locking ring 5. The second spherical surface 401 is in contact with the lower surface of the locking ring 5.

[0042] The adjusting stud 201 has a two-layer design, with four sets of adjusting studs 201 evenly distributed around the circumference in each layer, two in each set.

[0043] The two adjusting studs 201 respectively push the first adjusting ring 301 and the second adjusting ring 4.

[0044] The second adjusting ring 4 and the locking ring 5 are also fitted onto the connecting rod 1; there is a gap between the second adjusting ring 4 and the connecting rod 1.

[0045] The first adjusting ring 301 and the second adjusting ring 4 are driven to move by adjusting the stud 201 respectively. The double-layer adjustment design avoids the tilting of the adjusting cylinder 2 and further ensures coaxiality.

[0046] At the same time, by adjusting the two layers of adjusting studs 201, with eight adjusting studs 201 in each layer adjusting synchronously, the coaxiality accuracy can be precisely adjusted. The national standard requires it to be within 5%, while in this case, by adjusting the eight adjusting studs 201 synchronously, it can be within 3%.

[0047] like Figures 3-5 The connecting rod 1 is slidably connected with a first adjusting ring 6 and a second adjusting ring 601; the first adjusting ring 6 and the second adjusting ring 601 are both set as spiral surfaces 7 and are in contact with each other.

[0048] The first and second adjusting rings 601 are both interference fits or overfits with the connecting rod 1, and there is a damping feel between them.

[0049] The helical surface 7 can effectively eliminate the internal stress between the parts.

[0050] like Figure 3 and Figure 5 The bottom of the first adjusting ring 6 is provided with a snap-fit ​​groove 602, and the upper surface of the snap-fit ​​ring 5 is snapped into the snap-fit ​​groove 602.

[0051] When the second adjusting ring 4 is pushed to move, the second adjusting ring 4 pushes the locking ring 5 to move upward, and the first adjusting fixing ring 6, the second adjusting fixing ring 601 and the connecting rod 1 are limited by friction.

[0052] like Figures 1-2 A top ring 8 is fixedly connected to the end of the connecting rod 1 away from the connecting plate 101.

[0053] The output end of the tension testing machine is connected to the bottom of the top ring 8. The top ring 8 limits the tension testing machine from detaching from the connecting rod 1.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coaxiality adjustment mechanism, comprising a connecting rod (1) and an adjusting cylinder (2), characterized in that, The bottom of the regulating cylinder (2) is fixedly connected to a connecting plate (101); The connecting rod (1) has a first spherical surface (3) at its bottom, and the adjusting cylinder (2) has a first adjusting ring (301) inside, with the first adjusting ring (301) in contact with the first spherical surface (3); The side wall of the adjusting cylinder (2) is threaded with four sets of adjusting studs (201), and the four sets of adjusting studs (201) are evenly distributed circumferentially.

2. The coaxiality adjustment mechanism according to claim 1, characterized in that, Each set of the adjusting studs (201) consists of two designs.

3. The coaxiality adjustment mechanism according to claim 1, characterized in that, The regulating cylinder (2) is provided with a partition surface (202), and the top of the first regulating ring (301) is in contact with the lower surface of the partition surface (202).

4. The coaxiality adjustment mechanism according to claim 3, characterized in that, A snap ring (5) is slidably connected to the connecting rod (1), and a second adjusting ring (4) is provided on the upper surface of the partition surface (202). A second spherical surface (401) is provided on the top of the second adjusting ring (4). The second spherical surface (401) is in contact with the lower surface of the snap ring (5); The adjusting stud (201) has a two-layer design.

5. The coaxiality adjustment mechanism according to claim 4, characterized in that, The connecting rod (1) is slidably connected to a first adjusting fixing ring (6) and a second adjusting fixing ring (601). The first adjusting fixing ring (6) and the second adjusting fixing ring (601) are both fitted with a spiral surface (7) and are fitted together.

6. The coaxiality adjustment mechanism according to claim 5, characterized in that, The first adjusting fixing ring (6) has a snap-fit ​​groove (602) at the bottom, and the upper surface of the snap-fit ​​ring (5) is snapped into the snap-fit ​​groove (602).

7. The coaxiality adjustment mechanism according to claim 1, characterized in that, The bottom of the connecting plate (101) is provided with a connecting post (102).

8. The coaxiality adjustment mechanism according to claim 1, characterized in that, The end of the connecting rod (1) away from the connecting plate (101) is fixedly connected to a top ring (8).

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