Strength detection equipment for piston rod

Abstract

The strength detection equipment comprises a supporting device and a bearing device, the supporting device comprises a horizontal frame and a plurality of supporting legs installed at the top of the horizontal frame, the strength detection equipment further comprises a linkage clamping device, and the linkage clamping device comprises a workbench installed at the tops of the supporting legs; the second inserting hole and the communicating opening are formed in the workbench, and the communicating opening is communicated with the second inserting hole; the clamping device has the beneficial effects that a cooperative structure of the linkage clamping device and the clamping device is designed, a piston rod is inserted downwards to drive a fixing disc to move downwards, a plurality of clamping plates are synchronously driven to move towards the axis through a connecting rod piece, and concentric clamping is achieved in cooperation with a second spring; meanwhile, the first spring drives the inserting block to be automatically inserted into the inserting groove to lock the fixing disc, and extra manual operation of the clamp is not needed; compared with the tedious step that a special clamp is needed for fixing in the prior art, the clamping process is simplified, the clamping efficiency and the automation degree are improved, and the manual operation complexity is reduced.

Description

Technical Field

[0001] This invention belongs to the field of testing technology, specifically relating to a strength testing device for piston rods. Background Technology

[0002] The piston rod is the connecting component that supports the piston in performing work. It is mainly used in moving actuators such as hydraulic cylinders and pneumatic cylinders. It is a core component with frequent movement and high technical requirements. Its machining accuracy and mechanical properties directly determine the life and reliability of hydraulic and pneumatic systems.

[0003] In the industrial field, piston rods need to withstand complex working conditions such as axial loads and cyclic stresses for a long time. Insufficient strength can easily lead to failures such as fracture and deformation, which can result in equipment downtime, production interruption, or even safety accidents. Therefore, accurate strength testing of piston rods is a key link to ensure the safe operation of equipment and improve production continuity.

[0004] In the prior art, a piston rod strength testing device with patent publication number CN219590120U discloses a frame assembly and a testing mechanism. The frame assembly includes a base, a support frame, a guide plate, a storage plate, and an electrical control box. The testing mechanism includes a sleeve, an electric heating ring, a hydraulic cylinder, a motor, a spoke-type force sensor, a first laser rangefinder, and a torque sensor. It uses the hydraulic cylinder to drive the force sensor to compress the piston rod, and combines this with the rangefinder to monitor deformation, thereby acquiring and calculating strength data. However, this device has drawbacks in practical applications: the piston rod needs to be inserted into a workbench socket and fixed with a special clamp, making the clamping process cumbersome; after testing, the piston rod needs to be manually removed, and repeated operations increase the labor intensity of workers and result in low efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a strength testing device for piston rods, which realizes automatic linkage clamping and automatic discharge and recycling of piston rods after testing, simplifying the operation process and reducing labor intensity.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a strength testing device for piston rods, comprising a support device and a load-bearing device, wherein the support device includes a horizontal frame, multiple support legs mounted on the top of the horizontal frame, and further comprising... The linkage clamping device includes a worktable installed on the top of the support leg, a second insertion hole and a connecting port opened inside the worktable and connected to the second insertion hole, a fixed plate located below the worktable, multiple clamping plates movably arranged at the bottom of the worktable for clamping piston rods, a connecting rod rotatably arranged at the bottom of the fixed plate and the clamping plates, a second cross opening opened inside the fixed plate, and a slot opened on the side surface of the linkage clamping device. The ejection device includes a support frame installed at the bottom of the fixed plate, a first cross opening at the top of the support frame, a second electric push rod installed inside the support frame, an ejector pin disposed at the output end of the second electric push rod, and multiple push rods disposed on the outer wall of the ejector pin, wherein the ejector pin and push rods can pass through the second cross opening. A reset device, comprising a telescopic rod installed on the top of a horizontal frame, wherein the movable end of the telescopic rod is connected to a support frame, and a third spring is disposed inside the telescopic rod; A collection device, comprising a fastening seat mounted on the side surface of a horizontal frame, and a collection box slidably disposed on the fastening seat for collecting piston rods.

[0007] As a preferred technical solution of the present invention, the linkage clamping device further includes a limiting post disposed at the bottom of the workbench, a slot opened inside the clamping plate and slidable along the limiting post, a perforated upright plate installed at the bottom of the workbench, an extension post disposed on the side surface of the clamping plate and penetrating the perforated upright plate, and a second spring sleeved on the extension post and connected to the clamping plate and the perforated upright plate respectively.

[0008] As a preferred technical solution of the present invention, it further includes a material guiding device, which includes perforated lugs symmetrically installed on the top of the workbench, a movable plate rotatably disposed on the inner side of the perforated lugs, a first insertion hole opened inside the movable plate, and the size of the first insertion hole and the size of the second insertion hole are the same, and the height of the movable plate is higher than the height of the collection box.

[0009] As a preferred embodiment of the present invention, the material guiding device further includes a pad installed on the top of the workbench, and the bottom of the movable plate can be pressed on the pad.

[0010] As a preferred technical solution of the present invention, the collection device further includes a groove formed in the bottom of the fastening seat, and a sliding plate disposed at the bottom of the collection box and slidably connected to the groove.

[0011] As a preferred technical solution of the present invention, it further includes a snap-fit ​​device, which includes a support plate symmetrically arranged between the horizontal frame and the worktable, a movable rod movably arranged on one of the support plates, a fastening plate arranged at one end of the movable rod, an insert block arranged at one end of the fastening plate that can be inserted into the slot, and a first spring sleeved on the movable rod and connected to the support plate and the fastening plate respectively.

[0012] As a preferred embodiment of the present invention, it further includes a first electric push rod installed on the side surface of the support plate and a sleeve seat disposed at the bottom of the fastening plate.

[0013] As a preferred embodiment of the present invention, it further includes a guide rod disposed at the output end of the first electric push rod, and one end of the guide rod can be inserted into the interior of the sleeve seat.

[0014] As a preferred embodiment of the present invention, the supporting device includes an L-shaped frame that is detachably connected to a horizontal frame, and a PLC controller installed on the front surface of the L-shaped frame.

[0015] As a preferred technical solution of the present invention, it further includes a drive detection device, which includes a hydraulic cylinder installed on the top of the L-shaped frame, a connecting plate disposed at the output end of the hydraulic cylinder and passing through the top of the L-shaped frame, a laser rangefinder installed at the bottom of the connecting plate, and a spoke-type force sensor installed at the bottom of the laser rangefinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are: By designing a coordinated structure of the linkage clamping device and the snap-fit ​​device, the piston rod drives the fixed plate to move downward, and the connecting rod synchronously drives multiple clamping plates to move towards the axis, achieving concentric clamping with the help of the second spring; at the same time, the first spring drives the plug block to automatically insert into the slot and lock the fixed plate, eliminating the need for additional manual operation of the clamp; compared with the cumbersome steps of the prior art that require special clamps for fixing, this application simplifies the clamping process, improves clamping efficiency and automation, and reduces the complexity of manual operation; Through the coordinated design of the ejection device, reset device, material guiding device, and collection device, after the test is completed, the locking device is unlocked, the third spring drives the fixed plate to reset and release the clamping plate, the second electric push rod drives the ejector pin to eject the piston rod, and the push rod synchronously drives the movable plate to tilt, and the piston rod slides down the tilting plate into the collection box; there is no need to manually remove the piston rod one by one, which reduces repeated material handling operations, greatly reduces the labor intensity of the staff, and at the same time avoids the piston rod from being scattered and lost, improving the convenience and safety of post-testing processing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first axial side structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure after the movable plate is removed; Figure 3 This is a schematic diagram of the collection device structure of the present invention; Figure 4 For the present invention Figure 2 A schematic diagram of a local structure in the image; Figure 5 This is a schematic diagram of the snap-fit ​​device structure of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the cross-sectional structure in the middle; Figure 7 This is a schematic diagram of the linkage clamping device of the present invention; Figure 8This is a schematic diagram of the combined structure of the linkage clamping device and the ejection device of the present invention; Figure 9 For the present invention Figure 8 A schematic diagram of the local structure of the explosion; Figure 10 This is a schematic diagram of the cooperative structure of the reset device and the ejection device of the present invention; Figure 11 For the present invention Figure 10 A schematic diagram of a partial cross-sectional structure in the diagram; Figure 12 For the present invention Figure 2 A schematic diagram of the enlarged structure of region G in the diagram; In the picture: 1. Support device; 11. Horizontal frame; 12. Support leg; 2. Linkage clamping device; 21. Workbench; 210. Limiting column; 211. Perforated vertical plate; 22. Second insertion hole; 23. Communicating port; 24. Fixed plate; 240. Second cross joint; 25. Connecting rod; 26. Slot; 27. Clamping plate; 270. Groove; 28. Extension column; 29. ​​Second spring; 3. Material guiding device; 31. First insertion hole; 32. Movable plate; 33. Perforated lug; 34. Pad; 4. Bearing device; 41. L-shaped frame; 42. PLC controller; 5. Drive detection device; 51 52. Hydraulic cylinder; 53. Connecting plate; 54. Laser rangefinder; 55. Wheel spoke type force sensor; 6. Collection device; 66. Fastening seat; 67. Slide groove; 68. Collection box; 69. Slide plate; 70. Reset device; 71. Telescopic rod; 72. Third spring; 81. Ejection device; 82. Ejector pin; 83. Support frame; 84. Second electric push rod; 85. Push rod; 96. First cross joint; 97. Snap-fit ​​device; 98. Support plate; 99. Movable rod; 90. First spring; 91. Insert block; 92. Fastening plate; 93. First electric push rod; 94. Guide rod; 95. Sleeve seat. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 12This invention provides a strength testing device for piston rods, including a support device 1. The support device 1 includes a horizontal frame 11 and multiple support legs 12 installed on the top of the horizontal frame 11. The horizontal frame 11 provides a stable horizontal mounting reference for the entire device, ensuring the coaxiality and horizontality of the installation of core components such as the linkage clamping device 2 and the snap-fit ​​device 9. The multiple support legs 12 adopt a distributed layout to distribute the overall weight of the device and avoid deformation caused by concentrated force on a single support point.

[0020] It also includes a linkage clamping device 2, which includes a worktable 21 mounted on the top of the support leg 12, a second insertion hole 22 and a connecting port 23 opened inside the worktable 21, and the connecting port 23 is connected to the second insertion hole 22. The worktable 21 serves as the bearing base for piston rod detection, and its fixed connection with the support leg 12 ensures the structural rigidity during detection. The second insertion hole 22 provides precise insertion positioning for the piston rod, avoiding unstable clamping or uneven detection force caused by piston rod displacement. The connecting port 23 enables spatial communication between the second insertion hole 22 and the lower fixed plate 24 and clamping plate 27, providing a clearance channel for the movement of the connecting rod 25, while ensuring that the clamping plate 27 extends into the second insertion hole 22. On the outside, the piston rod is clamped around the outside. The linkage clamping device 2 also includes a fixed plate 24 located below the worktable 21, multiple clamping plates 27 movably disposed at the bottom of the worktable 21 to clamp the piston rod, and a connecting rod 25 rotatably disposed at the bottom of the fixed plate 24 and the clamping plates 27. The fixed plate 24 receives the downward pressure of the piston rod and converts the axial pressure into radial power to drive the clamping plates 27. Linkage clamping can be achieved without an additional power source, simplifying the structure and reducing energy consumption. The multiple clamping plates 27 are arranged in an equidistant ring array. Through the cooperation of the connecting rod 25 and the fixed plate 24, it is ensured that the clamping plates 27 move synchronously towards the axis when the piston rod is pressed down, realizing concentric clamping of the piston rod and avoiding clamping eccentricity. The uneven distribution of detection force caused by the linkage 25; the rotational connection design of the linkage 25 smoothly transforms the linear motion of the fixed plate 24 into the horizontal sliding of the clamping plate 27, thereby achieving the clamping of the piston rod; the linkage clamping device 2 also includes a second cross 240 opened inside the fixed plate 24, which provides a through channel for the ejector pin 81 and push rod 84 of the ejector device 8, ensuring that the ejector pin 81 can smoothly pass through the fixed plate 24 and enter the second insertion hole 22 to realize the ejection action of the piston rod; the linkage clamping device 2 also includes a slot 26 opened on the outer wall of the fixed plate 24, which provides precise snap-fit ​​positioning for the insertion block 94 of the snap-fit ​​device 9, ensuring that the fixed plate 24 moves down into the clamping plate 27. The piston rod is held and limited. The insert block 94 can be quickly inserted into the slot 26 to lock the position of the fixed plate 24, preventing the fixed plate 24 from shifting due to the reaction force of the piston rod or equipment vibration during the detection process, thus ensuring clamping stability and the reliability of detection data. The limiting post 210 set at the bottom of the worktable 21 and the slot 270 opened inside the clamping plate 27 and can slide along the limiting post 210 form a sliding guide mechanism, which strictly limits the movement trajectory of the clamping plate 27 to the horizontal direction, preventing the clamping plate 27 from tilting or shifting during the movement, and ensuring that the clamping surfaces of the multiple clamping plates 27 on the piston rod are always perpendicular to the piston rod axis, thus improving clamping accuracy.Meanwhile, the limiting column 210 can withstand the lateral force of the clamping plate 27, preventing the connecting rod 25 from bending and deforming due to excessive force on one side, thus extending the service life of the component. The perforated vertical plate 211 installed at the bottom of the workbench 21, the extension column 28 set on the side surface of the clamping plate 27 and passing through the perforated vertical plate 211, and the second spring 29 sleeved on the extension column 28 and connected to the clamping plate 27 and the perforated vertical plate 211 respectively, all provide guidance and support for the extension column 28, further enhancing the movement stability of the clamping plate 27. The extension column 28 makes the force on the clamping plate 27 more balanced, avoiding clamping loosening caused by force on one side. When the fixed plate 24 presses down, it drives the clamping plate 27 to move axially through the connecting rod 25. The second spring 29 is in a stretched state, ensuring that the piston rod does not move axially during the detection process. After the detection is completed, the reset force of the second spring 29 can assist the clamping plate 27 to release quickly, improving the discharge efficiency.

[0021] The locking device 9 includes support plates 91 symmetrically arranged between the horizontal frame 11 and the worktable 21. The symmetrically arranged support plates 91 provide a stable mounting surface for components such as the movable rod 92 and the first electric push rod 96, ensuring the overall structural rigidity of the locking device 9 and preventing locking failure due to component deformation during the locking process. Simultaneously, the position of the support plates 91 does not interfere with the movement of the linkage clamping device 2 and the ejection device 8, achieving spatial compatibility among the components. The locking device 9 also includes a movable rod movably mounted on one of the support plates 91. A rod 92, a fastening plate 95 at one end of the movable rod 92, a plug 94 at one end of the fastening plate 95 that can be inserted into the slot 26, and a first spring 93 sleeved on the movable rod 92 and connected to the support plate 91 and the fastening plate 95 respectively. The movable rod 92 provides linear motion guidance for the fastening plate 95 and the plug 94, ensuring that the plug 94 can be accurately aligned with the slot 26. When the fixed plate 24 moves down, it first squeezes the plug 94 and then squeezes the first spring 93 through the movement of the fastening plate 95 and the movable rod 92. When the slot 26 is aligned with the plug 94, the plug 94... The device can automatically insert into the slot 26 under the action of the first spring 93 to achieve quick locking of the fixed plate 24; the fastening plate 95 integrates the connection between the insert block 94 and the movable rod 92, making the force transmission more concentrated and avoiding breakage caused by the insert block 94 being subjected to force alone; the snap-fit ​​device 9 also includes a first electric push rod 96 installed on the side surface of the support plate 91, and a sleeve seat 98 set at the bottom of the fastening plate 95; a guide rod 97 is set at the output end of the first electric push rod 96, and one end of the guide rod 97 can be inserted into the inside of the sleeve seat 98, and the first electric push rod 96 drives the guide rod Inserting the guide rod 97 into the sleeve seat 98 prevents the sleeve seat 98 from moving towards the support plate 91, thereby locking the position of the fixing plate 24 after the insert block 94 engages with the slot 26. The guide rod 97 is added to facilitate replacement and reduce costs in case of damage. It should be noted that in the initial state of this application, the guide rod 97 is also inserted into the sleeve seat 98, but it does not fully penetrate into the sleeve seat 98, so that the sleeve seat 98 has space to move towards the support plate 91. This space is for pushing the insert block 94 backward when the fixing plate 24 moves downward.

[0022] The ejector device 8 includes a support frame 82 mounted on the bottom of the fixed plate 24, and a first cross opening 85 at the top of the support frame 82. The support frame 82 provides a stable mounting platform for the second electric push rod 83 and moves synchronously with the fixed plate 24 to ensure the coaxiality of the ejector pin 81 and the second insertion hole 22. The first cross opening 85 corresponds to the second cross opening 240 of the fixed plate 24, providing dual guidance for the ejector pin 81 and the push rod 84 to prevent the ejector pin 81 from tilting during ejection and to ensure that the piston rod can be ejected vertically. The ejector device 8 also includes a second electric push rod 83 mounted inside the support frame 82, an ejector pin 81 located at the output end of the second electric push rod 83, and multiple push rods 84 located on the outer wall of the ejector pin 81. 81. The push rod 84 can pass through the second cross 240, and the second electric push rod 83 provides stable ejection power. The ejector pin 81 acts directly on the bottom of the piston rod, realizing the forced disengagement of the piston rod from the second insertion hole 22 and the first insertion hole 31, solving the cumbersome problem of manual material handling in existing equipment. The synchronous movement of multiple push rods 84 can, on the one hand, assist the ejector pin 81 in sharing the ejection force, avoiding excessive force on a single ejector pin 81 that could cause deformation of the piston rod end. On the other hand, the push rod 84 can cooperate with the movable plate 32 of the material guiding device 3, and achieve automatic material guiding by pushing the movable plate 32 to tilt. The design of the ejector pin 81 and the push rod 84 passing through the second cross 240 realizes the compatibility of the ejection action with the structure of the fixed plate 24, without affecting the realization of the clamping function.

[0023] The reset device 7 includes a telescopic rod 71 installed on the top of the horizontal frame 11, with the movable end of the telescopic rod 71 connected to the support frame 82. A third spring 72 is installed inside the telescopic rod 71. The telescopic rod 71 provides guidance for the up-and-down movement of the support frame 82 and the fixed plate 24, ensuring the verticality of the fixed plate 24 when it moves down and avoiding asynchronous movement of the clamping plate 27 due to offset. When the third spring 72 is in a compressed state, it stores elastic potential energy. When the locking device 9 is unlocked, the reset force of the third spring 72 can quickly push the support frame 82 and the fixed plate 24 upward, causing the clamping plate 27 to release the piston rod. No additional power source is required, simplifying the structure and improving reset efficiency. At the same time, the buffering effect of the third spring 72 can prevent the fixed plate 24 from rigidly colliding with the worktable 21 when it moves up, reducing component wear and extending the service life of the equipment.

[0024] The collection device 6 includes a fastening base 61 mounted on the side surface of the horizontal frame 11, and a collection box 63 slidably mounted on the fastening base 61 to collect piston rods. The fastening base 61 provides a stable mounting foundation for the collection box 63, ensuring that the position of the collection box 63 corresponds to the tilt direction of the movable plate 32, thereby improving the collection success rate. The sliding arrangement of the collection box 63 facilitates the removal of collected piston rods by workers, reducing labor intensity. Simultaneously, the collection box 63 allows for centralized storage of tested piston rods, preventing loss due to scattering. The collection device 6 also includes an opening mechanism. The slide groove 62 located at the bottom of the fastening base 61 and the slide plate 64 located at the bottom of the collection box 63 and slidably connected to the slide groove 62 constitute a sliding guide mechanism, making the pulling action of the collection box 63 smoother and reducing sliding resistance. At the same time, the limiting effect of the slide groove 62 on the slide plate 64 can prevent the collection box 63 from shifting during the collection process, ensuring that the opening of the collection box 63 is always aligned with the discharge end of the movable plate 32, thus improving the stability of the collection. The cooperation between the slide plate 64 and the slide groove 62 can also distribute the weight of the collection box 63, avoiding wear caused by localized stress.

[0025] In this embodiment, a material guiding device 3 is also included. The material guiding device 3 includes perforated lugs 33 symmetrically mounted on the top of the workbench 21, a movable plate 32 rotatably disposed on the inner side of the perforated lugs 33, and a first insertion hole 31 opened inside the movable plate 32. The size of the first insertion hole 31 is the same as that of the second insertion hole 22. The perforated lugs 33 provide rotational support for the movable plate 32, allowing the movable plate 32 to rotate around the axis of the perforated lugs 33. The first insertion hole 31 and the second insertion hole 22 are coaxial and have the same diameter, ensuring that the piston rod can be smoothly inserted. It maintains axial positioning to prevent displacement during insertion. The rotating design of the movable plate 32 provides a basis for automatic material guiding. When the push rod 84 pushes the movable plate 32 to tilt, the piston rod can slide down along the movable plate 32 to the collection device 6 under the action of gravity, realizing automatic material discharge without manual intervention. The height of the movable plate 32 is higher than the height of the collection box 63. The height difference forms a natural guiding slope to ensure that the piston rod can slide down smoothly under the action of gravity, avoiding the piston rod from being stuck on the movable plate 32 due to insufficient height.

[0026] In this embodiment, the material guiding device 3 also includes a pad 34 installed on the top of the workbench 21. The bottom of the movable plate 32 can be pressed on the pad 34. The pad 34 provides horizontal support for the movable plate 32, ensuring that the movable plate 32 is in a horizontal state during the detection process. This avoids the piston rod from being mispositioned due to the tilt of the movable plate 32, which would affect the accuracy of the detection data. The supporting function of the pad 34 can also disperse the detection reaction force borne by the movable plate 32, preventing the movable plate 32 from bending and deforming due to excessive force, and extending the service life of the material guiding device 3.

[0027] In this embodiment, the supporting device 4 includes an L-shaped frame 41 that is detachably connected to the horizontal frame 11, and a PLC controller 42 installed on the front surface of the L-shaped frame 41. The L-shaped frame 41 and the horizontal frame 11 are designed to be detachably connected, which facilitates the transportation, installation and maintenance of the equipment. The installation position of the L-shaped frame 41 can be adjusted according to the actual testing requirements. The PLC controller 42 serves as the control core of the equipment, realizing the coordinated work of testing components such as the hydraulic cylinder 51 and the laser rangefinder 53 with functional components such as clamping, ejection and collection, thereby improving the automation level and testing efficiency of the equipment.

[0028] In this embodiment, a drive detection device 5 is also included. The drive detection device 5 includes a hydraulic cylinder 51 installed on the top of the L-shaped frame 41, a connecting plate 52 located at the output end of the hydraulic cylinder 51 and passing through the top of the L-shaped frame 41, a laser rangefinder 53 installed at the bottom of the connecting plate 52, and a spoke-type force sensor 54 installed at the bottom of the laser rangefinder 53. The hydraulic cylinder 51 provides a stable axial driving force, and the power is transmitted to the laser rangefinder 53 and the spoke-type force sensor 54 through the connecting plate 52 to ensure a stable output of the detection force.

[0029] The working principle and usage process of this invention: The operator passes one end of the piston rod to be tested through the first insertion hole 31 of the material guiding device 3 and the second insertion hole 22 of the linkage clamping device 2 in sequence. The piston rod drives the fixed plate 24 to move downward, causing the telescopic rod 71 of the reset device 7 to retract and the third spring 72 to be compressed and store elastic potential energy. At the same time, the fixed plate 24 pulls multiple equidistant clamping plates 27 through the connecting rod 25 rotatably connected at the bottom. They move synchronously towards the piston rod axis along the limiting column 210 (guided by the slot 270) at the bottom of the worktable 21. The extension column 28 on the side surface of the clamping plate 27 slides along the perforated vertical plate 211, and the second spring 29 is stretched by the clamping plate 27. When the fixed plate 24 moves down to the preset position (the clamping plate 27 is completely in contact with the outer wall of the piston rod to achieve concentric clamping), the slot 26 on the side surface of the linkage clamping device 2 is precisely aligned with the insertion block 94 of the snap-fit ​​device 9. The first spring 93 resets and pushes the fastening plate 95 to move along the movable rod 92 toward the slot 26, driving the insertion block 94 to be inserted into the slot 26, locking the position of the fixed plate 24, and completing the automatic linkage clamping of the piston rod. At this time, the bottom of the movable plate 32 is pressed against the pad 34 to maintain a horizontal state. The first insertion hole 31 and the second insertion hole 22 are coaxial to ensure accurate positioning of the piston rod. The operator sends a detection start command through the PLC controller 42, which drives the hydraulic cylinder 51 of the detection device 5 to start. Its output end pushes the connecting plate 52 to move downward in the vertical direction, causing the laser rangefinder 53 and the spoke-type force sensor 54 at the bottom of the connecting plate 52 to move downward synchronously. The spoke-type force sensor 54 first contacts the top of the piston rod, and as the hydraulic cylinder 51 continuously outputs power, it applies axial pressure to the piston rod; the laser rangefinder 53 monitors the distance change between the connecting plate 52 and the worktable 21 in real time, and accurately captures the deformation data of the piston rod; the spoke-type force sensor 54 synchronously collects real-time pressure data during the detection process, and both data are transmitted to the PLC controller 42 in real time for processing and analysis, and are dynamically displayed on the controller display screen; During the testing process, the PLC controller 42 continuously compares the real-time data with the preset threshold: if the pressure detected by the spoke-type force sensor 54 reaches the preset threshold and the deformation detected by the laser rangefinder 53 does not exceed the threshold, the piston rod strength is deemed qualified; if the deformation reaches the threshold in advance, the piston rod strength is deemed unqualified; in both cases, the PLC controller 42 is triggered to issue a test termination command, the hydraulic cylinder 51 stops pressurizing and prepares to reset. After the test is terminated, the PLC controller 42 controls the first electric push rod 96 of the snap-fit ​​device 9 to start. Its output end drives the guide rod 97 to retract, pulls the movable rod 92 to move the fastening plate 95, so that the sleeve seat 98 moves along the guide rod 97 and causes the insert block 94 to disengage from the inside of the slot 26, completing the snap-fit ​​unlocking. After the latch is unlocked, the third spring 72 of the reset device 7 releases the stored elastic potential energy, pushing the telescopic rod 71 to extend, causing the support frame 82 and the fixed plate 24 to move upward quickly; the fixed plate 24 pulls the clamping plate 27 away from the piston rod through the connecting rod 25, and the reset force of the second spring 29 assists the clamping plate 27 to release quickly; at the same time, the fixed plate 24 moves upward to the initial position, and the telescopic rod 71 returns to the extended state; After the fixed plate 24 is reset, the PLC controller 42 controls the second electric push rod 83 of the ejection device 8 to start. Its output end pushes the ejector pin 81 and multiple push rods 84 on the outer wall, which pass through the first cross 85 of the support frame 82 and the second cross 240 of the fixed plate 24 in sequence, and extend upward into the interior of the second insertion hole 22. The ejector pin 81 acts directly on the bottom of the piston rod, providing a stable ejection force to force the piston rod out of the second insertion hole 22 and the first insertion hole 31; at the same time, the push rod 84 moves upward and abuts against the bottom of the movable plate 32 of the guide device 3, pushing the movable plate 32 to rotate and tilt around the axis of the perforated lug 33. Since the movable plate 32 is at a higher height than the collection box 63, the piston rod that is pushed out slides down along the inclined movable plate 32 under the action of gravity and falls precisely into the collection box 63 of the collection device 6 to achieve automatic discharge; after the test is completed, the power supply of the equipment is turned off, the collection box 63 is pulled out, and the piston rod after the test is taken out.

[0030] Although embodiments of the invention have been shown and described (see the detailed description above), 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A strength testing device for piston rods, comprising a support device (1) and a bearing device (4), wherein the support device (1) comprises a horizontal frame (11) and a plurality of support legs (12) mounted on the top of the horizontal frame (11), characterized in that: Also includes The linkage clamping device (2) includes a workbench (21) installed on the top of the support leg (12), a second insertion hole (22) and a communication port (23) opened inside the workbench (21), and the communication port (23) is connected to the second insertion hole (22), a fixed plate (24) located below the workbench (21), multiple clamping plates (27) movably set at the bottom of the workbench (21) to clamp the piston rod, a connecting rod (25) rotatably set at the bottom of the fixed plate (24) and the clamping plates (27), a second cross opening (240) opened inside the fixed plate (24), and a slot (26) opened on the side surface of the linkage clamping device (2). The ejection device (8) includes a support frame (82) installed at the bottom of the fixed plate (24), a first cross opening (85) opened at the top of the support frame (82), a second electric push rod (83) installed inside the support frame (82), an ejector pin (81) set at the output end of the second electric push rod (83), and a plurality of push rods (84) set on the outer wall of the ejector pin (81), and the ejector pin (81) and the push rods (84) can pass through the second cross opening (240); The reset device (7) includes a telescopic rod (71) installed on the top of the horizontal frame (11), and the movable end of the telescopic rod (71) is connected to the support frame (82), and a third spring (72) is provided inside the telescopic rod (71). The collection device (6) includes a fastening seat (61) mounted on the side surface of the horizontal frame (11) and a collection box (63) slidably disposed on the fastening seat (61) to collect the piston rod.

2. The strength testing device for piston rods according to claim 1, characterized in that: The linkage clamping device (2) further includes a limiting post (210) set at the bottom of the workbench (21), a slot (270) opened inside the clamping plate (27) and sliding along the limiting post (210), a perforated upright plate (211) installed at the bottom of the workbench (21), an extension post (28) set on the side surface of the clamping plate (27) and passing through the perforated upright plate (211), and a second spring (29) sleeved on the extension post (28) and connected to the clamping plate (27) and the perforated upright plate (211) respectively.

3. The strength testing device for piston rods according to claim 1, characterized in that: It also includes a material guiding device (3), which includes perforated lugs (33) symmetrically installed on the top of the workbench (21), a movable plate (32) rotatably disposed on the inner side of the perforated lugs (33), and a first insertion hole (31) opened inside the movable plate (32). The size of the first insertion hole (31) is the same as the size of the second insertion hole (22). The height of the movable plate (32) is higher than the height of the collection box (63).

4. The strength testing device for piston rods according to claim 3, characterized in that: The material guiding device (3) also includes a pad (34) installed on the top of the workbench (21), and the bottom of the movable plate (32) can be pressed on the pad (34).

5. The strength testing device for piston rods according to claim 1, characterized in that: The collection device (6) also includes a groove (62) opened at the bottom of the fastening seat (61) and a sliding plate (64) set at the bottom of the collection box (63) and slidably connected to the groove (62).

6. The strength testing device for piston rods according to claim 1, characterized in that: It also includes a snap-fit ​​device (9), which includes a support plate (91) symmetrically arranged between the horizontal frame (11) and the worktable (21), a movable rod (92) movably arranged on one of the support plates (91), a fastening plate (95) arranged at one end of the movable rod (92), a plug (94) arranged at one end of the fastening plate (95) and insertable into the slot (26), and a first spring (93) sleeved on the movable rod (92) and connected to the support plate (91) and the fastening plate (95) respectively.

7. The strength testing device for piston rods according to claim 6, characterized in that: It also includes a first electric push rod (96) mounted on the side surface of the support plate (91) and a sleeve seat (98) located at the bottom of the fastening plate (95).

8. The strength testing device for piston rods according to claim 7, characterized in that: It also includes a guide rod (97) disposed at the output end of the first electric push rod (96), and one end of the guide rod (97) can be inserted into the interior of the sleeve seat (98).

9. The strength testing device for piston rods according to claim 1, characterized in that: The support device (4) includes an L-shaped frame (41) that is detachably connected to the horizontal frame (11) and a PLC controller (42) installed on the front surface of the L-shaped frame (41).

10. A strength testing device for piston rods according to claim 9, characterized in that: It also includes a drive detection device (5), which includes a hydraulic cylinder (51) installed on the top of the L-shaped frame (41), a connecting plate (52) located at the output end of the hydraulic cylinder (51) and passing through the top of the L-shaped frame (41), a laser rangefinder (53) installed at the bottom of the connecting plate (52), and a spoke-type force sensor (54) installed at the bottom of the laser rangefinder (53).

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