Testing device for bending resistance of piston rod

Abstract

The utility model discloses a device for testing the bending resistance of a piston rod, which comprises a bottom plate, the bottom of the bottom plate is fixedly connected with a plurality of supporting rods which are uniformly distributed, the bottoms of the supporting rods are fixedly connected with anti-slip pads, the upper end of the bottom plate is slidably connected with two positioning seats which are symmetrically distributed, and the upper end of the bottom plate is fixedly connected with the anti-slip pads. The top of the positioning seat is fixedly connected with a fixing plate, and the interior of the fixing plate is connected with a rotating rod through threads. According to the utility model, the two groups of positioning seats and pressing seats are designed to be matched for use, so that the two ends of the piston rod can be positioned, and when the piston rod is positioned, the arc-shaped blocks are connected with the arc-shaped grooves in an inserting manner, so that the connecting blocks can be limited, and the positioning seats can be further fixed; the arc-shaped blocks can be matched with the arc-shaped grooves in different positions in an inserted mode by pushing the positioning seats, the distance between the two positioning seats can be adjusted, and positioning testing can be conveniently carried out on piston rods of different sizes.

Description

Technical Field

[0001] This utility model relates to the technical field of bending testing devices, specifically a testing device for the bending resistance of a piston rod. Background Technology

[0002] The piston rod is the connecting component that supports the piston in performing work. It is mostly used in the moving parts of hydraulic cylinders and pneumatic cylinders, and is a moving component with frequent movement and high technical requirements. Taking a hydraulic cylinder as an example, it consists of several parts: cylinder barrel, piston rod (cylinder rod), piston, and end cap. The quality of its machining directly affects the lifespan and reliability of the entire product. The piston rod has high machining requirements; its surface roughness requirement is Ra0.4~0.8μm, and strict requirements are placed on coaxiality and wear resistance.

[0003] During the manufacturing process of piston rods, it is necessary to test the bending resistance of the finished piston rods to verify their strength. Current testing equipment is inconvenient for positioning and testing piston rods of different lengths, making it difficult to test different locations on the piston rod. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide a testing device for the bending resistance of piston rods, which solves the problem of inconvenience in positioning and testing piston rods of different lengths, and also solves the problem of inconvenience in testing different positions of the piston rod.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a testing device for the bending resistance of a piston rod, comprising a base plate, a plurality of evenly distributed support rods fixedly connected to the bottom of the base plate, anti-slip pads fixedly connected to the bottom of the support rods, two symmetrically distributed positioning seats slidably connected to the upper end of the base plate, a fixing plate fixedly connected to the top of the positioning seats, a rotating rod threadedly connected to the inside of the fixing plate, a pressure seat rotatably connected to the lower end of the rotating rod via a bearing, a mounting seat slidably connected to the upper end of the base plate, a hydraulic cylinder fixedly mounted on the inner side of the mounting seat, a top block fixedly connected to the outer side of the output end of the hydraulic cylinder, a pressure sensor disposed inside the top block, an adjustment mechanism disposed on the positioning seats, and a moving mechanism disposed on the mounting seat.

[0006] Preferably, the adjustment mechanism includes a connecting block. The connecting block is fixedly connected to the outer side of the positioning seat. The connecting block is slidably connected to the base plate. A connecting seat is slidably sleeved on the outer side of the connecting block. The connecting seat is fixedly connected to the base plate. An arc-shaped groove is formed inside the connecting seat. An arc-shaped block is slidably connected inside the arc-shaped groove. The arc-shaped block is slidably connected to the connecting block. A fixing rod is slidably sleeved inside the arc-shaped block. The fixing rod is fixedly connected to the connecting block. A spring is provided on the outer side of the fixing rod. A guide rod is slidably sleeved inside the connecting block. The guide rod is fixedly connected to the connecting seat. This adjustment mechanism facilitates the adjustment of the positioning seat's position.

[0007] Preferably, there are multiple arc-shaped grooves, which are evenly distributed inside the connecting seat. By designing multiple arc-shaped grooves, the arc-shaped block can slide into the arc-shaped grooves at different positions.

[0008] Preferably, one end of the spring is fixedly connected to the arc-shaped block, and the other end of the spring is fixedly connected to the connecting block. The spring is designed so that its force can be applied to the arc-shaped block.

[0009] Preferably, the moving mechanism includes a connecting column, which is fixedly connected to the bottom of the mounting base. A screw is threaded into the inside of the connecting column, and handles are fixedly connected to both ends of the screw. A connecting rod is fixedly connected to the outside of the connecting column, and a guide rod is slidably sleeved inside the connecting rod. Support seats are fixedly connected to both ends of the guide rod, and the support seats are fixedly connected to the base plate. This moving mechanism facilitates adjustment of the top block's position.

[0010] Preferably, a rotating seat is rotatably connected to the outer side of the screw via a bearing, and the rotating seat is fixedly connected to the base plate. By designing the rotating seat, the screw can be rotatably supported.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model, through the design of two sets of positioning seats and pressure seats working together, can position both ends of the piston rod. When positioning the piston rod, the connecting block can be limited by the insertion of the arc-shaped block and the arc-shaped groove, thereby fixing the positioning seat. By pushing the positioning seat, the arc-shaped block can be inserted and engaged with the arc-shaped groove at different positions. The distance between the two positioning seats can be adjusted, which is convenient for positioning tests of piston rods of different sizes.

[0013] 2. This utility model utilizes the design of a hydraulic cylinder. The output end of the hydraulic cylinder can drive the top block to move. The piston rod can be subjected to bending resistance test by the contact and pressure between the top block and the piston rod. The screw is threadedly connected to the connecting column. When the handle is turned to drive the screw to rotate, the threaded movement of the connecting column can be realized, which in turn can drive the mounting base to move horizontally. The position of the top block can be adjusted to facilitate bending test at different positions of the piston rod. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged view of point A;

[0016] Figure 3 This utility model Figure 2 Top sectional view of the connector;

[0017] Figure 4 This utility model Figure 1 A three-dimensional view of the base plate structure.

[0018] In the diagram: 1. Base plate; 2. Support rod; 3. Anti-slip pad; 4. Positioning seat; 5. Fixing plate; 6. Rotating rod; 7. Pressure seat; 8. Adjusting mechanism; 9. Moving mechanism; 10. Mounting seat; 11. Hydraulic cylinder; 12. Top block; 81. Connecting block; 82. Connecting seat; 83. Arc groove; 84. Arc block; 85. Fixing rod; 86. Spring; 87. Guide rod; 91. Connecting column; 92. Screw; 93. Handle; 94. Connecting rod; 95. Guide rod; 96. Support seat; 97. Rotating seat. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 , Figure 2 , Figure 4A testing device for the bending resistance of a piston rod includes a base plate 1. Multiple evenly distributed support rods 2 are fixedly connected to the bottom of the base plate 1. Anti-slip pads 3 are fixedly connected to the bottom of the support rods 2. Two symmetrically distributed positioning seats 4 are slidably connected to the upper end of the base plate 1. A fixing plate 5 is fixedly connected to the top of the positioning seats 4. A rotating rod 6 is threadedly connected inside the fixing plate 5. A pressure seat 7 is rotatably connected to the lower end of the rotating rod 6 via a bearing. A mounting seat 10 is slidably connected to the upper end of the base plate 1. A hydraulic cylinder 11 is fixedly mounted inside the mounting seat 10. A top block 12 is fixedly connected to the outer side of the output end of the hydraulic cylinder 11. A pressure sensor is installed inside the top block 12. An adjustment mechanism 8 is provided on the positioning seats 4, and a moving mechanism 9 is provided on the mounting seat 10.

[0021] Please see Figure 1 , Figure 2 , Figure 3 The adjusting mechanism 8 includes a connecting block 81. The connecting block 81 is fixedly connected to the outer side of the positioning seat 4. The connecting block 81 is slidably connected to the base plate 1. A connecting seat 82 is slidably sleeved on the outer side of the connecting block 81. The connecting seat 82 is fixedly connected to the base plate 1. An arc-shaped groove 83 is formed inside the connecting seat 82. An arc-shaped block 84 is slidably connected inside the arc-shaped groove 83. There are multiple arc-shaped grooves 83, which are evenly distributed inside the connecting seat 82. By designing multiple arc-shaped grooves 83, the arc-shaped block 84 can slide into the arc-shaped grooves 83 at different positions. Block 84 is slidably connected to connecting block 81. A fixing rod 85 is slidably sleeved inside the arc-shaped block 84. The fixing rod 85 is fixedly connected to the connecting block 81. A spring 86 is provided on the outside of the fixing rod 85. One end of the spring 86 is fixedly connected to the arc-shaped block 84, and the other end of the spring 86 is fixedly connected to the connecting block 81. By designing the spring 86, the force of the spring 86 can be applied to the arc-shaped block 84. A guide rod 87 is slidably sleeved inside the connecting block 81. The guide rod 87 is fixedly connected to the connecting seat 82. By designing the adjustment mechanism 8, the position of the positioning seat 4 can be easily adjusted.

[0022] Please see Figure 1 , Figure 4 The moving mechanism 9 includes a connecting column 91. The bottom of the mounting base 10 is fixedly connected to the connecting column 91. The inside of the connecting column 91 is connected to a screw 92 via a thread. Both ends of the screw 92 are fixedly connected to handles 93. The outside of the connecting column 91 is fixedly connected to a connecting rod 94. The inside of the connecting rod 94 is slidably fitted with a guide rod 95. Both ends of the guide rod 95 are fixedly connected to support seats 96. The support seats 96 are fixedly connected to the base plate 1. The outside of the screw 92 is rotatably fitted with a rotating seat 97 via a bearing. The rotating seat 97 is fixedly connected to the base plate 1. By designing the rotating seat 97, the screw 92 can be rotated and supported. By designing the moving mechanism 9, the position of the top block 12 can be easily adjusted.

[0023] The specific implementation process of this utility model is as follows: In use, when it is necessary to position the piston rod, first place the piston rod on the positioning seat 4, then rotate the rotating rod 6. The rotating rod 6 makes a threaded movement and drives the pressure seat 7 to move downward, so that the pressure seat 7 contacts and squeezes the piston rod to press and position it. After positioning is completed, start the hydraulic cylinder 11. The output end of the hydraulic cylinder 11 drives the top block 12 to move, so that the top block 12 contacts and presses the piston rod to perform a bending resistance test on the piston rod.

[0024] When the position of the positioning seat 4 needs to be adjusted, the positioning seat 4 is pushed directly. The positioning seat 4 drives the connecting block 81 to move. The connecting block 81 slides along the guide rod 87. At the same time, the connecting block 81 drives the arc block 84 to move. The arc block 84 slides along the arc surface of the arc groove 83. The arc block 84 will be squeezed and pushed by the arc surface of the arc groove 83 and slide into the connecting block 81. The arc block 84 can slide along the fixed rod 85 to squeeze the spring 86, which can separate the arc block 84 from the arc groove 83. As the arc block 84 moves horizontally, the elastic action of the spring 86 will give the arc block 84 a counter-pushing force, which can push the arc block 84 into the arc groove 83 at another position. At this time, the relative position of the connecting block 81 and the connecting seat 82 can be adjusted and fixed, so that the position of the positioning seat 4 can be adjusted. The distance between the two positioning seats 4 can be adjusted, which is convenient for positioning tests of piston rods of different sizes.

[0025] When the position of the top block 12 needs to be adjusted, turn the handle 93. The handle 93 drives the screw 92 to rotate, causing the connecting column 91 to make threaded movement. The connecting column 91 will drive the connecting rod 94 to slide along the guide rod 95, thereby causing the connecting column 91 to drive the mounting base 10 to move horizontally. The position of the top block 12 can be adjusted, which is convenient for bending tests at different positions of the piston rod.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the bending resistance of a piston rod, comprising a base plate (1), characterized in that: The bottom of the bottom plate (1) is fixedly connected with a plurality of support rods (2) distributed uniformly, the bottom of the support rod (2) is fixedly connected with a non-slip pad (3), the upper end of the bottom plate (1) is slidably connected with two positioning seats (4) distributed symmetrically, the top of the positioning seat (4) is fixedly connected with a fixed plate (5), the inside of the fixed plate (5) is threadedly connected with a rotating rod (6), the lower end of the rotating rod (6) is rotatably connected with a pressing seat (7) through a bearing, the upper end of the bottom plate (1) is slidably connected with a mounting seat (10), the inner side of the mounting seat (10) is fixedly provided with a hydraulic cylinder (11), the outer side of the output end of the hydraulic cylinder (11) is fixedly connected with a top block (12), the inside of the top block (12) is provided with a pressure sensor, the positioning seat (4) is provided with an adjusting mechanism (8), and the mounting seat (10) is provided with a moving mechanism (9).

2. A device for testing the bending resistance of a piston rod according to claim 1, characterized in that The adjusting mechanism (8) comprises a connecting block (81), the outer side of the positioning seat (4) is fixedly connected with the connecting block (81), the connecting block (81) is slidably connected with the bottom plate (1), the outer side of the connecting block (81) is slidably sleeved with a connecting seat (82), the connecting seat (82) is fixedly connected with the bottom plate (1), the inside of the connecting seat (82) is provided with an arc-shaped groove (83), the inside of the arc-shaped groove (83) is slidably connected with an arc-shaped block (84), the arc-shaped block (84) is slidably connected with the connecting block (81), the inside of the arc-shaped block (84) is slidably sleeved with a fixed rod (85), the fixed rod (85) is fixedly connected with the connecting block (81), the outer side of the fixed rod (85) is provided with a spring (86), the inside of the connecting block (81) is slidably sleeved with a guide rod (87), and the guide rod (87) is fixedly connected with the connecting seat (82).

3. A device for testing the bending resistance of a piston rod according to claim 2, characterized in that The number of the arc-shaped grooves (83) is a plurality, and the plurality of arc-shaped grooves (83) are uniformly distributed in the connecting seat (82).

4. A device for testing the bending resistance of a piston rod according to claim 2, characterized in that One end of the spring (86) is fixedly connected with the arc-shaped block (84), and the other end of the spring (86) is fixedly connected with the connecting block (81).

5. A device for testing the bending resistance of a piston rod according to claim 1, characterized in that The moving mechanism (9) comprises a connecting column (91), the bottom of the mounting seat (10) is fixedly connected with the connecting column (91), the inside of the connecting column (91) is threadedly connected with a screw rod (92), the left and right ends of the screw rod (92) are both fixedly connected with a handle (93), the outer side of the connecting column (91) is fixedly connected with a connecting rod (94), the inside of the connecting rod (94) is slidably sleeved with a guide rod (95), the left and right ends of the guide rod (95) are both fixedly connected with a support seat (96), and the support seat (96) is fixedly connected with the bottom plate (1).

6. A device for testing the bending resistance of a piston rod according to claim 5, characterized in that The outer side of the screw rod (92) is rotatably sleeved with a rotating seat (97) through a bearing, and the rotating seat (97) is fixedly connected with the bottom plate (1).

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