Piston rod aging test temperature control device

Abstract

The invention relates to the technical field of piston rod testing devices, and discloses a piston rod aging test temperature control device which comprises a bottom plate and a fixing assembly arranged at the top of the bottom plate, the fixing assembly comprises a moving plate slidably connected to the top of the bottom plate, and the inner wall of the moving plate is fixedly connected with a square plate. A transverse block is fixedly connected to the side wall of the moving plate, a two-way threaded rod is rotatably connected to the top of the transverse block, an adjusting block is fixedly connected to the outer wall of the top of the two-way threaded rod, a sleeving block is in threaded connection to the outer wall of the two-way threaded rod, and one side of the sleeving block is in sliding connection with the side wall of the moving plate; and the other side of the sleeving block is fixedly connected with an extrusion plate, through the arrangement of the fixing assembly, the two ends of the piston rod subjected to the aging test can be conveniently clamped and fixed through the two moving plates, and the piston rods with different diameters can be conveniently and effectively fixed through the multiple extrusion rods.

Description

Technical Field

[0001] The invention relates to the technical field of piston rod testing devices, in particular to a piston rod aging testing temperature control device. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mainly used in motion actuators such as oil cylinders and pneumatic cylinders. It transmits torque and bears loads so that the reciprocating motion of the piston can be converted into linear or rotational motion of other mechanical parts. Piston rods are widely used in industrial machinery, and their processing quality directly affects the life and reliability of the entire product.

[0003] According to a device and method for testing the bending fatigue performance of a hydraulic cylinder piston rod coating proposed in Chinese patent CN116773674B, in the device, the output shafts of four hydraulic jacks of a limiting mechanism push two support brackets to move upward, and lift the piston rod upward. When the piston rod is lifted upward, it will contact the top walls of the two upper interlocking cone grooves, thereby pushing the self-locking block upward, causing the tensioning rod fixedly connected to the self-locking block to slide upward along the sliding sleeve, further causing the spring to compress and generate a rebound force, so that under the action of the rebound force of the spring, the self-locking block is squeezed downward, so that the piston rod is automatically tensioned and limited under the upper and lower clamping of the support bracket and the self-locking block. Compared with manual fixation, the convenience of using the device is greatly improved.

[0004] However, there are still some shortcomings in this patent. In this device, the end of the piston rod is clamped and fixed by the self-locking block and the support frame. Since the models of piston rods are different, the diameters of their ends are also different, and the depth of the interlocking conical groove in the self-locking block and the support frame is fixed. Therefore, in the process of clamping and fixing the piston rod, it is difficult to clamp and fix the piston rods with different end diameters. Summary of the invention

[0005] The purpose of the present invention is to provide a piston rod aging test temperature control device, which solves the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a piston rod aging test temperature control device, comprising a base plate and a fixed component arranged on the top of the base plate, the fixed component comprising a movable plate slidably connected to the top of the base plate, the inner wall of the movable plate is fixedly connected with a square plate, the side wall of the movable plate is fixedly connected with a cross block, the top of the cross block is rotatably connected with a two-way threaded rod, the top outer wall of the two-way threaded rod is fixedly connected with an adjusting block, the outer wall of the two-way threaded rod is threadedly connected with a sleeve block, one side of the sleeve block is slidably connected to the side wall of the movable plate, the other side of the sleeve block is fixedly connected with an extrusion plate, the bottom of the extrusion plate is fixedly connected with a sleeve, the inner wall of the sleeve is fixedly connected with a first spring, and the other end of the first spring is fixedly connected with An extrusion rod, wherein the outer wall of the extrusion rod is slidably connected to the inner wall of the sleeve. By setting a fixing component, the piston rod needs to be clamped and fixed before the aging test of the piston rod is required, so as to improve the stability of the piston rod during the test. At this time, the operator passes the piston rod into the interior of the square plate, and then rotates the adjusting block to cause the bidirectional threaded rod to rotate. During the rotation of the bidirectional threaded rod, the two extrusion plates will be caused to move relative to each other. When the two extrusion plates are relatively close, the extrusion rod will be caused to squeeze the outer wall of the piston rod. At this time, the other end of the extrusion rod will compress the first spring. Through the support of the piston rod by multiple extrusion rods, it is easy to clamp and fix the piston rod to be tested, so as to fix piston rods of different sizes.

[0007] Preferably, the fixing assembly also includes a first fixing frame fixedly connected to the top of the base plate, the top inner wall of the first fixing frame is fixedly connected to the forward and reverse motor, the output end of the forward and reverse motor is fixedly connected to the first output shaft, the outer wall of the other end of the first output shaft is fixedly connected to the first gear, the outer wall of the first gear is meshed with a rack, and the side wall of the rack is fixedly connected to the outer wall of the movable plate. Before clamping and fixing the piston rod, in order to facilitate the fixation of piston rods of different lengths, the operator turns on the forward and reverse motor to cause the first output shaft to rotate. During the rotation of the first output shaft, the first gear will rotate with it. After the first gear rotates, it will mesh with the rack, so that the two racks are relatively close or relatively far away. After the two racks are relatively close or relatively far away, they will bring the two movable plates relatively close or relatively far away, thereby facilitating the adjustment of the spacing between the two movable plates and facilitating the fixation of piston rods of different lengths.

[0008] Preferably, the fixing assembly also includes a sleeve block fixedly connected to the outer wall of the movable plate, the inner wall of the sleeve block is slidably connected to a cross bar, the end face of the cross bar is fixedly connected to a side plate, the other end of the side plate is fixedly connected to the top of the bottom plate, the side wall of the sleeve block is fixedly connected to a second spring, the other end of the second spring is fixedly connected to the side wall of the side plate, during the movement of the movable plate, the sleeve block will slide on the outer wall of the cross bar, thereby achieving limiting the movement of the movable plate, and the second spring is used to facilitate buffering of the movable plate during the movement.

[0009] Preferably, a test assembly is also provided on the top of the base plate, and the test assembly includes an L-shaped rod fixedly connected to the top of the base plate, the other end of the L-shaped rod is fixedly connected to a connecting block, the inner wall of the connecting block is fixedly connected to a rectangular frame, the outer wall of the rectangular frame is fixedly connected to a first driving motor, the output end of the first driving motor is fixedly connected to a screw rod, the other end of the screw rod is rotatably connected to the inner wall of the rectangular frame, the outer wall of the screw rod is threadedly connected to a slider, the bottom of the slider is fixedly connected to a semicircular plate, the inner wall of the side of the semicircular plate is fixedly connected to an annular plate, the outer wall of the annular plate is fixedly connected to a second fixing frame, the inner wall of the second fixing frame is fixedly connected to a second driving motor, the output end of the second driving motor is fixedly connected to a second output shaft, the outer wall of the other end of the second output shaft is fixedly connected to a second gear, the top of the second gear is meshed with a gear ring, the side wall of the gear ring is provided with a limiting groove, the inner wall of the limiting groove is slidably connected to the limiting block, the other side of the limiting block is fixedly connected to a rectangular connecting block, the other end of the rectangular connecting block is fixedly connected to the side wall of the annular plate, The inner wall of the gear ring is fixedly connected with a tester body, and the top of the tester body is fixedly connected with a temperature control probe body. By setting the test component, after the piston rod is clamped and fixed, when the piston rod needs to be subjected to an aging test, the operator can open the tester body to realize the aging test of the piston rod. By opening the temperature control probe body, it is convenient to monitor the temperature change inside the device in real time. When it is necessary to adjust the test position of the piston rod, the operator turns on the first drive motor to cause the screw rod to rotate. During the rotation of the screw rod, the slider will move laterally along the outer wall of the screw rod and the inner wall of the rectangular frame, thereby adjusting the test position of the tester body on the surface of the piston rod. When it is necessary to perform an annular test on the surface of the piston rod, the operator turns on the second drive motor to cause the second output shaft to rotate. After the second output shaft rotates, it will cause the second gear to rotate. During the rotation of the second gear, it will mesh with the gear ring. Under the action of the rectangular connecting block and the limit block on the gear ring, the gear ring is caused to rotate, so that the tester body is rotated, thereby facilitating the annular test of the piston rod.

[0010] Preferably, there are two movable plates, the two movable plates are equal in size, and the two movable plates are symmetrically distributed along the center plane of the bottom plate. By providing two movable plates, it is convenient to clamp and fix the two ends of the piston rod undergoing the aging test.

[0011] Preferably, the side wall of the sleeve block is fixedly connected to the outer wall of the movable plate, and the inner wall of the sleeve block is slidably matched with the outer wall of the cross bar. By arranging the sleeve block and the cross bar, it is convenient to limit the movable plate during the movement process.

[0012] Preferably, there are two cross bars, and the two cross bars are symmetrically distributed along the center plane of the movable plate.

[0013] Preferably, there are eight limit blocks, which are divided into two groups. The two groups of limit blocks are symmetrically distributed along the center plane of the gear ring. By setting eight limit blocks, it is convenient to limit the gear ring and make the gear ring rotate smoothly.

[0014] The present invention provides a temperature control device for piston rod aging test. The temperature control device for piston rod aging test has the following beneficial effects: (1) The piston rod aging test temperature control device is provided with a fixing component. Before the piston rod needs to be subjected to the aging test, the piston rod needs to be clamped and fixed, thereby improving the stability of the piston rod during the test. At this time, the operator inserts the piston rod into the interior of the square plate, and then rotates the adjustment block to cause the bidirectional threaded rod to rotate. During the rotation of the bidirectional threaded rod, the two extrusion plates will be caused to move relative to each other. When the two extrusion plates are relatively close, the extrusion rod will be caused to squeeze the outer wall of the piston rod. At this time, the other end of the extrusion rod will compress the first spring. With the support of the piston rod by multiple extrusion rods, it is easy to clamp and fix the piston rod to be tested, so as to fix piston rods of different sizes. Before clamping and fixing the piston rod, in order to facilitate the fixing of piston rods of different lengths, the operator turns on the forward and reverse motors to cause the first output shaft to rotate. During the rotation of the first output shaft, the first gear will rotate with it. After the first gear rotates, it will mesh with the rack, so that the two racks are relatively close to or relatively far away from each other. After the two racks are relatively close to or relatively far away from each other, the two moving plates will be relatively close to or relatively far away from each other, so that it is easy to adjust the distance between the two moving plates and to fix piston rods of different lengths. During the movement of the moving plate, the sleeve block will slide on the outer wall of the cross bar, so as to limit the movement of the moving plate, and the second spring will be used to buffer the moving plate during the movement. (2) The piston rod aging test temperature control device is provided with a test assembly. After the piston rod is clamped and fixed, when the piston rod needs to be subjected to an aging test, the operator can open the tester body to realize the aging test of the piston rod. By opening the temperature control probe body, it is convenient to monitor the temperature change inside the device in real time. When it is necessary to adjust the test position of the piston rod, the operator turns on the first drive motor to cause the screw to rotate. During the rotation of the screw, the slider moves laterally along the outer wall of the screw and the inner wall of the rectangular frame, thereby adjusting the test position of the tester body on the surface of the piston rod. When it is necessary to perform an annular test on the surface of the piston rod, the operator turns on the second drive motor to cause the second output shaft to rotate. After the second output shaft rotates, the second gear rotates. During the rotation of the second gear, it meshes with the gear ring. Under the action of the rectangular connecting block and the limit block limiting the gear ring, the gear ring is caused to rotate, so that the tester body rotates, thereby facilitating the annular test of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the structure of the fixing component in the present invention; Figure 4 It is a schematic diagram of the local structure of the fixing component in the present invention; Figure 5 for Figure 4 A partial enlarged view of the middle A; Figure 6 It is a schematic diagram of the structure of the test assembly in the present invention; Figure 7 is a cross-sectional view of a test assembly in the present invention; Figure 8 for Figure 7 A partial enlarged view of point B in the middle.

[0016] In the figure: 1, bottom plate; 21, fixed assembly; 211, moving plate; 212, square plate; 213, cross block; 214, bidirectional threaded rod; 215, adjustment block; 216, sleeve block; 217, extrusion plate; 218, sleeve; 219, first spring; 2110, extrusion rod; 2111, first fixed frame; 2112, forward and reverse motor; 2113, first output shaft; 2114, first gear; 2115, rack; 2116, sleeve block; 2117, cross bar; 2118, side plate; 2119, second Spring; 22, test assembly; 221, L-shaped rod; 223, connecting block; 224, rectangular frame; 225, first drive motor; 226, lead screw; 227, slider; 228, semicircular plate; 229, annular plate; 2210, second fixed frame; 2211, second drive motor; 2212, second output shaft; 2213, second gear; 2214, gear ring; 2215, limit groove; 2216, limit block; 2217, rectangular connecting block; 2218, tester body; 2219, temperature control probe body. DETAILED DESCRIPTION

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0018] A preferred embodiment of a piston rod aging test temperature control device provided by the present invention is as follows: Figures 1 to 8As shown: a piston rod aging test temperature control device, including a base plate 1, and a fixed component 21 arranged on the top of the base plate 1, the fixed component 21 includes a moving plate 211 slidably connected to the top of the base plate 1, the inner wall of the moving plate 211 is fixedly connected with a square plate 212, the side wall of the moving plate 211 is fixedly connected with a cross block 213, the top of the cross block 213 is rotatably connected with a bidirectional threaded rod 214, the top outer wall of the bidirectional threaded rod 214 is fixedly connected with an adjusting block 215, the outer wall of the bidirectional threaded rod 214 is threadedly connected with a sleeve block 216, one side of the sleeve block 216 is slidably connected to the side wall of the moving plate 211, the other side of the sleeve block 216 is fixedly connected with an extrusion plate 217, the bottom of the extrusion plate 217 is fixedly connected with a sleeve 218, the inner wall of the sleeve 218 is fixedly connected with a first spring 219, the other end of the first spring 219 is fixedly connected with an extrusion rod 2110, The outer wall of the pressure rod 2110 is slidably connected to the inner wall of the sleeve 218. By setting up the fixing component 21, the piston rod needs to be clamped and fixed before the aging test of the piston rod is required, so as to improve the stability of the piston rod during the test. At this time, the operator passes the piston rod into the interior of the square plate 212, and then rotates the adjusting block 215 to cause the bidirectional threaded rod 214 to rotate. During the rotation of the bidirectional threaded rod 214, the two extrusion plates 217 will be prompted to move relative to each other. When the two extrusion plates 217 are relatively close, the extrusion rod 2110 will be prompted to squeeze the outer wall of the piston rod. At this time, the other end of the extrusion rod 2110 will compress the first spring 219. Through the support of multiple extrusion rods 2110 on the piston rod, it is easy to clamp and fix the piston rod being tested, so as to fix piston rods of different sizes.

[0019] The fixing assembly 21 also includes a first fixing frame 2111 fixedly connected to the top of the bottom plate 1, the top inner wall of the first fixing frame 2111 is fixedly connected to a forward and reverse motor 2112, the output end of the forward and reverse motor 2112 is fixedly connected to a first output shaft 2113, the other end outer wall of the first output shaft 2113 is fixedly connected to a first gear 2114, the outer wall of the first gear 2114 is meshed with a rack 2115, the side wall of the rack 2115 is fixedly connected to the outer wall of the movable plate 211, before the piston rod is clamped and fixed, in order to facilitate the fixing of piston rods of different lengths At regular intervals, the operator turns on the forward and reverse motor 2112 to cause the first output shaft 2113 to rotate. During the rotation of the first output shaft 2113, the first gear 2114 will also rotate. After the first gear 2114 rotates, it will mesh with the rack 2115, causing the two racks 2115 to be relatively close to or relatively far away. After the two racks 2115 are relatively close to or relatively far away, they will also cause the two movable plates 211 to be relatively close to or relatively far away, thereby facilitating the adjustment of the spacing between the two movable plates 211 and facilitating the fixation of piston rods of different lengths.

[0020] The fixing assembly 21 also includes a sleeve block 2116 fixedly connected to the outer wall of the movable plate 211, the inner wall of the sleeve block 2116 is slidably connected to a cross bar 2117, the end face of the cross bar 2117 is fixedly connected to a side plate 2118, the other end of the side plate 2118 is fixedly connected to the top of the bottom plate 1, the side wall of the sleeve block 2116 is fixedly connected to a second spring 2119, the other end of the second spring 2119 is fixedly connected to the side wall of the side plate 2118, during the movement of the movable plate 211, the sleeve block 2116 will slide on the outer wall of the cross bar 2117, thereby realizing the limitation of the movable plate 211 during movement, and the second spring 2119 is used to facilitate the buffering of the movable plate 211 during the movement.

[0021] A preferred embodiment of a piston rod aging test temperature control device provided by the present invention is as follows: Figures 1 to 8As shown: a test assembly 22 is also provided on the top of the bottom plate 1, and the test assembly 22 includes an L-shaped rod 221 fixedly connected to the top of the bottom plate 1, and the other end of the L-shaped rod 221 is fixedly connected to a connecting block 223, and the inner wall of the connecting block 223 is fixedly connected to a rectangular frame 224, and the outer wall of the rectangular frame 224 is fixedly connected to a first driving motor 225, and the output end of the first driving motor 225 is fixedly connected to a screw rod 226, and the other end of the screw rod 226 is rotatably connected to the inner wall of the rectangular frame 224, and the outer wall of the screw rod 226 is threadedly connected to a slider 227, and the bottom of the slider 227 is fixedly connected to a semicircular plate 228, and the inner wall of the side of the semicircular plate 228 is fixedly connected to an annular plate 229, and the annular plate 229 is fixedly connected to the inner wall of the semicircular plate 228. The outer wall of the annular plate 229 is fixedly connected to a second fixing frame 2210, the inner wall of the second fixing frame 2210 is fixedly connected to a second driving motor 2211, the output end of the second driving motor 2211 is fixedly connected to a second output shaft 2212, the outer wall of the other end of the second output shaft 2212 is fixedly connected to a second gear 2213, the top of the second gear 2213 is meshed with a gear ring 2214, the side wall of the gear ring 2214 is provided with a limiting groove 2215, the inner wall of the limiting groove 2215 is slidably connected to a limiting block 2216, the other side of the limiting block 2216 is fixedly connected to a rectangular connecting block 2217, the other end of the rectangular connecting block 2217 is fixedly connected to the side wall of the annular plate 229, and the gear ring The inner wall of 2214 is fixedly connected with a tester body 2218, and the top of the tester body 2218 is fixedly connected with a temperature control probe body 2219. By setting the test component 22, after the piston rod is clamped and fixed, when the piston rod needs to be subjected to an aging test, the operator can open the tester body 2218 to achieve an aging test on the piston rod. By opening the temperature control probe body 2219, it is convenient to monitor the temperature change inside the device in real time. When it is necessary to adjust the test position of the piston rod, the operator turns on the first drive motor 225 to cause the screw rod 226 to rotate. During the rotation of the screw rod 226, the slider 227 is driven along the outer wall of the screw rod 226. And the inner wall of the rectangular frame 224 moves laterally, so as to adjust the test position of the tester body 2218 on the surface of the piston rod. When it is necessary to perform an annular test on the surface of the piston rod, the operator turns on the second drive motor 2211 to cause the second output shaft 2212 to rotate. After the second output shaft 2212 rotates, it will drive the second gear 2213 to rotate. During the rotation of the second gear 2213, it will engage with the ring gear 2214. Under the action of the rectangular connecting block 2217 and the limit block 2216 on the ring gear 2214, the ring gear 2214 is caused to rotate, so that the tester body 2218 is rotated, thereby facilitating the annular test of the piston rod.

[0022] Furthermore, there are two movable plates 211, the two movable plates 211 are equal in size, and the two movable plates 211 are symmetrically distributed along the central plane of the base plate 1. By setting up two movable plates 211, it is convenient to clamp and fix the two ends of the piston rod undergoing the aging test.

[0023] Furthermore, the side wall of the sleeve block 2116 is fixedly connected to the outer wall of the movable plate 211, and the inner wall of the sleeve block 2116 is slidably matched with the outer wall of the cross bar 2117. By setting the sleeve block 2116 and the cross bar 2117, it is convenient to limit the movable plate 211 during the movement process.

[0024] Furthermore, there are two cross bars 2117 , and the two cross bars 2117 are symmetrically distributed along the center plane of the movable plate 211 .

[0025] In addition, there are eight limit blocks 2216, which are divided into two groups. The two groups of limit blocks 2216 are symmetrically distributed along the center plane of the ring gear 2214. By setting eight limit blocks 2216, it is convenient to limit the ring gear 2214 so that the ring gear 2214 can rotate smoothly.

[0026] Working principle: before the aging test of the piston rod is required, the piston rod needs to be clamped and fixed, so as to improve the stability of the piston rod during the test. At this time, the operator inserts the piston rod into the inside of the square plate 212, and then rotates the adjustment block 215 to cause the bidirectional threaded rod 214 to rotate. During the rotation of the bidirectional threaded rod 214, the two extrusion plates 217 will be caused to move relative to each other. When the two extrusion plates 217 are relatively close, the extrusion rod 2110 will be caused to squeeze the outer wall of the piston rod. At this time, the other end of the extrusion rod 2110 will compress the first spring 219. With the support of the piston rod by multiple extrusion rods 2110, it is easy to clamp and fix the piston rod to be tested, so as to fix piston rods of different sizes. Before clamping and fixing the piston rod, in order to facilitate the fixing of piston rods of different lengths, the operator turns on the forward and reverse motor 2112 to cause the first output shaft 2113 to rotate. During the rotation of the first output shaft 2113, the first gear 2114 will be rotated. After the first gear 2114 rotates, it will mesh with the rack 2115, so that the two racks 2115 are relatively close or relatively far away. After the two racks 2115 are relatively close or relatively far away, the two moving plates 211 are relatively close or relatively far away, so that it is easy to adjust the distance between the two moving plates 211, so as to facilitate the fixing of piston rods of different lengths. During the movement of the moving plate 211, the sleeve block 2116 will slide on the outer wall of the cross bar 2117, so as to limit the movement of the moving plate 211, and the second spring 2119 will be used to buffer the moving plate 211 during the movement. After the piston rod is clamped and fixed, when the piston rod needs to be subjected to an aging test, the operator can open the tester body 2218 to perform an aging test on the piston rod. By opening the temperature control probe body 2219, it is convenient to monitor the temperature change inside the device in real time. When the test position of the piston rod needs to be adjusted, the operator turns on the first drive motor 225 to cause the screw rod 226 to rotate. During the rotation of the screw rod 226, the slider 227 moves laterally along the outer wall of the screw rod 226 and the inner wall of the rectangular frame 224, thereby adjusting the tester body 2218. For the test position on the piston rod surface, when it is necessary to perform an annular test on the surface of the piston rod, the operator turns on the second drive motor 2211 to cause the second output shaft 2212 to rotate. After the second output shaft 2212 rotates, it will cause the second gear 2213 to rotate. During the rotation of the second gear 2213, it will engage with the ring gear 2214. Under the action of the rectangular connecting block 2217 and the limit block 2216 that limit the ring gear 2214, the ring gear 2214 is caused to rotate, and the tester body 2218 is rotated, thereby facilitating the annular test on the piston rod.

[0027] The above description is only an illustrative specific implementation mode of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any technician in the field without departing from the concept and principle of the present invention should fall within the scope of protection of the present invention. It should also be noted that the various components of the present invention are not limited to the above-mentioned overall application. The various technical features described in the specification of the present invention can be selected one by one or multiple ones can be selected and used in combination according to actual needs. Therefore, the present invention should naturally cover other combinations and specific applications related to the invention point of this case.

Claims

1. A piston rod aging test temperature control device, comprising a base plate (1), and a fixing assembly (21) arranged on the top of the base plate (1), characterized in that: The fixing assembly (21) comprises a moving plate (211) slidably connected to the top of the bottom plate (1); the inner wall of the moving plate (211) is fixedly connected to a square plate (212); the side wall of the moving plate (211) is fixedly connected to a horizontal block (213); the top of the horizontal block (213) is rotatably connected to a bidirectional threaded rod (214); the top outer wall of the bidirectional threaded rod (214) is fixedly connected to an adjusting block (215); the outer wall of the bidirectional threaded rod (214) is threadedly connected to a sleeve block (216) ), one side of the sleeve block (216) is slidably connected to the side wall of the movable plate (211), the other side of the sleeve block (216) is fixedly connected to an extrusion plate (217), the bottom of the extrusion plate (217) is fixedly connected to a sleeve (218), the inner wall of the sleeve (218) is fixedly connected to a first spring (219), the other end of the first spring (219) is fixedly connected to an extrusion rod (2110), and the outer wall of the extrusion rod (2110) is slidably connected to the inner wall of the sleeve (218).

2. A piston rod aging test temperature control device according to claim 1, characterized in that: The fixing assembly (21) further comprises a first fixing frame (2111) fixedly connected to the top of the bottom plate (1); a forward and reverse motor (2112) is fixedly connected to the inner wall of the top of the first fixing frame (2111); an output end of the forward and reverse motor (2112) is fixedly connected to a first output shaft (2113); an outer wall of the other end of the first output shaft (2113) is fixedly connected to a first gear (2114); a rack (2115) is meshed on the outer wall of the first gear (2114); and a side wall of the rack (2115) is fixedly connected to the outer wall of the movable plate (2111).

3. A piston rod aging test temperature control device according to claim 1, characterized in that: The fixing assembly (21) further comprises a sleeve block (2116) fixedly connected to the outer wall of the movable plate (211); the inner wall of the sleeve block (2116) is slidably connected to a cross bar (2117); the end surface of the cross bar (2117) is fixedly connected to a side plate (2118); the other end of the side plate (2118) is fixedly connected to the top of the bottom plate (1); the side wall of the sleeve block (2116) is fixedly connected to a second spring (2119); the other end of the second spring (2119) is fixedly connected to the side wall of the side plate (2118).

4. A piston rod aging test temperature control device according to claim 1, characterized in that: A test assembly (22) is also provided on the top of the base plate (1), the test assembly (22) comprising an L-shaped rod (221) fixedly connected to the top of the base plate (1), the other end of the L-shaped rod (221) fixedly connected to a connection block (223), the inner wall of the connection block (223) fixedly connected to a rectangular frame (224), the outer wall of the rectangular frame (224) fixedly connected to a first drive motor (225), the output end of the first drive motor (225) fixedly connected to a lead screw (226), the other end of the lead screw (226) rotatably connected to the inner wall of the rectangular frame (224), the outer wall of the lead screw (226) threadedly connected to a slider (227), the bottom of the slider (227) fixedly connected to a semicircular plate (228), the inner wall of the side surface of the semicircular plate (228) fixedly connected to an annular plate (229), and the outer wall of the annular plate (229) fixedly connected to a second fixing frame (2210). The inner wall of the second fixing frame (2210) is fixedly connected to a second driving motor (2211); the output end of the second driving motor (2211) is fixedly connected to a second output shaft (2212); the outer wall of the other end of the second output shaft (2212) is fixedly connected to a second gear (2213); the top of the second gear (2213) is meshed with a gear ring (2214); a limiting groove (2215) is provided on the side wall of the gear ring (2214); a limiting block (2216) is slidably connected to the inner wall of the limiting groove (2215); a rectangular connecting block (2217) is fixedly connected to the other side of the limiting block (2216); the other end of the rectangular connecting block (2217) is fixedly connected to the side wall of the annular plate (229); the inner wall of the gear ring (2214) is fixedly connected to a tester body (2218); and the top of the tester body (2218) is fixedly connected to a temperature control probe body (2219).

5. The piston rod aging test temperature control device according to claim 1, characterized in that: There are two movable plates (211), the two movable plates (211) are equal in size, and the two movable plates (211) are symmetrically distributed along the central plane of the bottom plate (1).

6. The piston rod aging test temperature control device according to claim 3, characterized in that: The side wall of the sleeve block (2116) is fixedly connected to the outer wall of the movable plate (211), and the inner wall of the sleeve block (2116) is slidably matched to the outer wall of the cross bar (2117).

7. The piston rod aging test temperature control device according to claim 3, characterized in that: There are two cross bars (2117), and the two cross bars (2117) are symmetrically distributed along the center plane of the movable plate (211).

8. The temperature control device for piston rod aging test according to claim 4, characterized in that: There are eight limit blocks (2216), and the eight limit blocks (2216) are divided into two groups. The two groups of limit blocks (2216) are symmetrically distributed along the center plane of the gear ring (2214).

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