Jig structure for stably and cyclically testing pressure

Abstract

The utility model discloses a jig structure for stable cyclic pressure testing, which relates to the technical field of pressure testing and comprises a testing frame, the testing frame comprises a bottom plate and a top plate, and two parallel guide rods are fixedly connected between the bottom plate and the top plate; a clamping plate is mounted on the guide rod in a sliding manner; a threaded rod parallel to the guide rod is installed on the bottom plate in a threaded fit mode, the bottom end of the threaded rod is rotationally matched with the upper surface of the clamping plate, and a handle is installed at the top of the threaded rod. A locking nut is installed on the threaded rod in a threaded fit mode and located between the top plate and the clamping plate. According to the utility model, the interaction force between the threaded rod and the top plate is greatly reduced, so that the possibility that the screw slips to cause the pressure falling phenomenon is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pressure testing technology, specifically to a fixture structure for stabilizing cyclic testing pressure. Background Technology

[0002] Batteries require testing during production. In existing cyclic testing with expansion force, the battery casing bulges during charging and discharging, creating interaction forces between the battery and the clamping plate. Over time, this can cause the pressure fixture screws to strip, leading to pressure detachment. This, in turn, deviates from the cell's cyclic degradation trend, affecting test results. Therefore, reducing pressure detachment caused by stripped screws during testing is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide a fixture structure for stabilizing cyclic testing pressure, thereby addressing the aforementioned shortcomings in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fixture structure for stabilizing cyclic testing pressure, comprising a test frame, the test frame including a base plate and a top plate, with two parallel guide rods fixedly connected between the base plate and the top plate; a clamping plate slidably mounted on the guide rods; a threaded rod parallel to the guide rods is threadedly mounted on the base plate, the bottom end of the threaded rod rotatably engaging with the upper surface of the clamping plate, and a handle is mounted on the top of the threaded rod; a locking nut is threadedly mounted on the threaded rod, the locking nut being located between the top plate and the clamping plate.

[0005] Preferably, the end face of the locking nut facing the top plate is a horizontal plane, and the lower surface of the top plate is a horizontal plane.

[0006] Preferably, a sleeve is vertically fixedly installed on the lower surface of the top plate, a piston rod that mates with the sleeve is vertically fixedly installed on the upper surface of the clamping plate corresponding to the position of the sleeve, and an oil storage tank is fixedly installed on the upper surface of the top plate corresponding to the position of the sleeve.

[0007] Preferably, the top plate has an oil groove inside that connects the sleeve and the oil storage tank, and a blocking block that cooperates with the oil groove is vertically slidably installed on the lower surface of the top plate.

[0008] Preferably, the blocking block and the locking nut are vertically aligned, and a ball bearing is movably mounted at the bottom end of the blocking block.

[0009] Preferably, the blocking block is provided with protrusions to ensure that it does not detach from the top plate.

[0010] Preferably, a sealing ring that mates with the inner wall of the sleeve is fixedly installed on the top surface of the piston rod.

[0011] Preferably, the top of the oil storage tank is provided with a vent.

[0012] In the above technical solution, the fixture structure for stabilizing cyclic testing pressure provided by this utility model, after the rotating threaded rod drives the clamping plate to clamp the battery in conjunction with the base plate, the locking nut is rotated to make the locking nut fit tightly against the lower surface of the top plate; thus, when the battery expands and applies a pushing force to the clamping plate, not only is there an interaction force between the threaded rod and the top plate, but the locking nut also applies a pushing force to the top plate, which greatly reduces the interaction force between the threaded rod and the top plate, thereby reducing the possibility of pressure drop due to screw stripping. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a three-dimensional structural diagram of the fixture for stabilizing cyclic test pressure in the embodiment.

[0015] Figure 2 This is a plan view of the fixture structure for stabilizing cyclic test pressure in the embodiment;

[0016] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Test frame; 101. Base plate; 102. Top plate; 103. Guide rod; 104. Oil tank; 2. Clamping plate; 3. Threaded rod; 4. Handle; 5. Locking nut; 6. Sleeve; 7. Piston rod; 8. Oil reservoir; 801. Vent hole; 9. Blocking block; 10. Ball bearing; 11. Sealing ring. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2As shown, this embodiment provides a fixture structure for stabilizing cyclic test pressure, including a test frame 1. The test frame 1 includes a base plate 101 and a top plate 102. Two parallel guide rods 103 are fixedly connected between the base plate 101 and the top plate 102. A clamping plate 2 is slidably mounted on the guide rods 103. A threaded rod 3 parallel to the guide rods 103 is threadedly mounted on the base plate 101. The bottom end of the threaded rod 3 is rotatably engaged with the upper surface of the clamping plate 2. A handle 4 is mounted on the top of the threaded rod 3. A locking nut 5 is threadedly mounted on the threaded rod 3. The locking nut 5 is located between the top plate 102 and the clamping plate 2. The end face of the locking nut 5 facing the top plate 102 is a horizontal plane, and the lower surface of the top plate 102 is a horizontal plane.

[0021] During testing, the battery is first placed on the base plate 101, with the distance between the base plate 101 and the clamping plate 2 greater than the height of the battery. Then, the operator rotates the handle 4, causing the threaded rod 3 to rotate. As the threaded rod 3 rotates, it moves downward relative to the top plate 102, pushing the clamping plate 2 downward as well, until the lower surface of the clamping plate 2 is in contact with the battery, thus completing the clamping of the battery. Next, the operator rotates the locking nut 5, causing it to move upward along the threaded rod 3 until it is in contact with the lower surface of the top plate 102. During testing in this state, if the battery expands, it applies an upward pushing force to the clamping plate 2. The clamping plate 2 then applies an upward pushing force to the top plate 102 through the threaded rod 3. This creates an interaction force between the threads connecting the threaded rod 3 and the top plate 102. Simultaneously, because the locking nut 5 is in contact with the top plate 102, and the threaded rod 3 also applies an upward pushing force to the lower surface of the top plate 102 through the locking nut 5, this partially offsets the interaction force between the threaded rod 3 and the top plate 102, significantly reducing the possibility of stripping. It should be noted that this embodiment can achieve the above effects for batteries of different thicknesses.

[0022] like Figure 2 and Figure 3 As shown, a sleeve 6 is vertically fixedly installed on the lower surface of the top plate 102, and a piston rod 7 that mates with the sleeve 6 is vertically fixedly installed on the upper surface of the clamping plate 2 corresponding to the position of the sleeve 6. A sealing ring 11 that mates with the inner wall of the sleeve 6 is fixedly installed on the top surface of the piston rod 7. An oil storage tank 8 is fixedly installed on the upper surface of the top plate 102 corresponding to the position of the sleeve 6. A vent hole 801 is provided on the top of the oil storage tank 8. An oil groove 104 connecting the sleeve 6 and the oil storage tank 8 is provided inside the top plate 102. A blocking block 9 that mates with the oil groove 104 is vertically slidably installed on the lower surface of the top plate 102. The blocking block 9 corresponds vertically to the locking nut 5, and a ball bearing 10 is movably installed at the bottom end of the blocking block 9. A protrusion is provided on the blocking block 9 to ensure that it will not detach from the top plate 102.

[0023] Hydraulic oil is stored in the sleeve 6, oil tank 104, and oil reservoir 8. When the clamping plate 2 moves along the guide rod 103, the piston rod 7 also moves vertically relative to the sleeve 6, allowing the hydraulic oil in the sleeve 6 to exchange with the hydraulic oil in the oil reservoir 8 through the oil tank 104. Specifically, when the piston rod 7 rises relative to the sleeve 6, it squeezes the hydraulic oil in the sleeve 6 into the oil reservoir 8; when the piston rod 7 falls relative to the sleeve 6, the hydraulic oil in the oil reservoir 8 flows into the sleeve 6. After adjusting the position of the clamping plate 2, the operator rotates the locking nut 5, causing the locking nut 5 to move upward along the threaded rod 3. The movement continues until the locking nut 5 is in contact with the lower surface of the top plate 102. During this process, the locking nut 5 is in contact with the ball 10 and pushes the ball 10 and the blocking block 9 to rise. When the locking nut 5 is in contact with the lower surface of the top plate 102, the blocking block 9 also seals the oil groove 104. In this way, the hydraulic oil in the sleeve 6 cannot be exchanged with the hydraulic oil in the oil tank 8 through the oil groove 104. Since hydraulic oil is extremely difficult to compress, the total length of the sleeve 6 and the piston rod 7 remains constant. During the test, the distance between the clamping plate 2 and the top plate 102 can be kept constant, further reducing the possibility of slippage.

[0024] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fixture structure for stabilizing cyclic test pressure, comprising a test frame (1), the test frame (1) comprising a base plate (101) and a top plate (102), wherein two parallel guide rods (103) are fixedly connected between the base plate (101) and the top plate (102), characterized in that, A clamping plate (2) is slidably mounted on the guide rod (103); a threaded rod (3) parallel to the guide rod (103) is installed on the bottom plate (101) through a threaded engagement, the bottom end of the threaded rod (3) is rotatably engaged with the upper surface of the clamping plate (2), and a handle (4) is installed on the top of the threaded rod (3); a locking nut (5) is installed on the threaded rod (3) through a threaded engagement, and the locking nut (5) is located between the top plate (102) and the clamping plate (2).

2. The fixture structure for stabilizing cyclic test pressure according to claim 1, characterized in that, The end face of the locking nut (5) facing the top plate (102) is a horizontal plane, and the lower surface of the top plate (102) is a horizontal plane.

3. The fixture structure for stabilizing cyclic test pressure according to claim 2, characterized in that, A sleeve (6) is vertically fixedly installed on the lower surface of the top plate (102), and a piston rod (7) that cooperates with the sleeve (6) is vertically fixedly installed on the upper surface of the clamping plate (2) corresponding to the position of the sleeve (6). An oil storage tank (8) is fixedly installed on the upper surface of the top plate (102) corresponding to the position of the sleeve (6).

4. The fixture structure for stabilizing cyclic test pressure according to claim 3, characterized in that, The top plate (102) has an oil trough (104) inside that connects the sleeve (6) and the oil storage tank (8), and a blocking block (9) that cooperates with the oil trough (104) is vertically slidably installed on the lower surface of the top plate (102).

5. The fixture structure for stabilizing cyclic test pressure according to claim 4, characterized in that, The blocking block (9) is positioned vertically corresponding to the locking nut (5), and a ball bearing (10) is movably installed at the bottom end of the blocking block (9).

6. The fixture structure for stabilizing cyclic test pressure according to claim 5, characterized in that, The blocking block (9) is provided with protrusions to ensure that it does not detach from the top plate (102).

7. The fixture structure for stabilizing cyclic test pressure according to claim 6, characterized in that, The piston rod (7) is fixedly installed with a sealing ring (11) that mates with the inner wall of the sleeve (6).

8. The fixture structure for stabilizing cyclic test pressure according to claim 7, characterized in that, The top of the oil storage tank (8) is provided with a vent (801).

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