Push-pull force testing device

Abstract

The application is suitable for the technical field of testing, and provides a push-pull force testing device, which comprises a workbench, a protective cover installed on the top of the workbench, and a load assembly slidingly connected to the top of the workbench. The load assembly comprises a sliding table slidingly connected to the top of the workbench. The top of the workbench is provided with a positioning assembly. The device solves the problem that when a product is positioned by using a latch, the height of the product needs to be repeatedly adjusted to complete the perforation of the multiple holes of the latch, and because the product body and the tooling fixture form a visual blind area, the real-time alignment state of the hole cannot be directly observed, and the alignment can only be determined by repeatedly adjusting and visually confirming, which leads to the problem of alignment lag. The device first puts the latch sleeve into the small hole of the product, and then makes the latch body extend into the large hole of the positioning block to complete the positioning by the spring elastic force. When the alignment is not correct, the latch body is on the side wall of the positioning block, and the product end can be adjusted to automatically pop in, without the need of visual observation of the alignment, and the latch can be inserted by slightly shaking the hand, thereby solving the problem of alignment lag.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing, more particularly, it relates to a push-pull force testing device. BACKGROUND

[0002] Push-pull force testing is a key means for product mechanical property detection, mainly relying on professional equipment such as push-pull force gauge and universal testing machine, by applying axial push force or pull force to the sample product, simulating the stress scene in actual use, detecting the mechanical properties of the product, judging whether the product meets the industry standard or design requirement through data results, effectively avoiding the safety risks of structure failure, fracture and other safety risks caused by unqualified mechanical properties in use.

[0003] At present, when the existing testing device is operated, the product is usually placed on the device manually, and the two ends of the product are connected to the testing device through a latch; after the connection is completed, the worker controls the product to elongate or shorten, and the load of the testing device moves with the elongation or shortening movement of the product, and the pull force sensor tests the push-pull force of the product in the elongation and shortening process in real time.

[0004] However, when positioning the product by using the latch, one end of the product is inserted into the positioning seat, and then the worker passes the latch out of the positioning seat and the latch hole at the end of the product, and then the positioning is completed, during which the worker needs to repeatedly adjust the height of the product to complete the passing of the multiple holes of the latch, and the worker is easily blocked by the product body and the tooling fixture, forming a visual blind area, and cannot directly observe the real-time alignment state of the hole, and can only rely on repeated adjustment and visual confirmation, resulting in delayed alignment judgment. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a push-pull force testing device.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a push-pull force testing device, comprising a workbench, a protective cover mounted on the top of the workbench, and a load assembly slidingly connected to the top of the workbench, the load assembly comprising a sliding table slidingly connected to the top of the workbench.

[0007] The top of the workbench is provided with a positioning assembly, the positioning assembly comprising a positioning mechanism mounted on the top of the workbench and a testing mechanism mounted on the top of the sliding table, and a product is arranged between the positioning mechanism and the testing mechanism.

[0008] Two groups of plug-in assemblies are arranged between the positioning mechanism and the testing mechanism, each group of plug-in assemblies comprising a latch mechanism and two groups of auxiliary mechanisms.

[0009] Each of the latch mechanisms comprises a latch sleeve and two latch bodies, the two latch bodies are inserted into the inside of the corresponding latch sleeve, the latch body corresponding to the positioning mechanism is inserted into the corresponding positioning mechanism when extended, and the latch body corresponding to the testing mechanism is inserted into the corresponding testing mechanism when extended.

[0010] The load assembly further comprises two guide rails symmetrically mounted on the top of the workbench, the top of the two guide rails is slidably connected with a sliding block, the sliding block is mounted on the bottom of a sliding table, and the top of the sliding table is provided with a driving mechanism.

[0011] The top of the workbench is provided with a rack, the driving mechanism is arranged in a matched mode with the rack, the driving mechanism comprises a box body mounted on the top of the sliding table and a vertical plate mounted on one side of the box body, one side of the vertical plate is provided with a driving motor, the other side of the vertical plate is provided with a gear, the gear is located in the inside of the box body, the output end of the driving motor extends into the inside of the box body and is connected with the gear, and the gear teeth are in engagement with the top of the rack.

[0012] The positioning mechanism comprises a positioning seat mounted on the top of the workbench and two first positioning blocks slidably connected to one side of the positioning seat, one side of the positioning seat is rotatably connected with a first bidirectional screw rod, the two first positioning blocks are threadedly connected to the outer side wall of the first bidirectional screw rod, and one end of the product is inserted between the two first positioning blocks and is connected through a corresponding set of plug-in assemblies.

[0013] The testing mechanism comprises a positioning table mounted on the top of the sliding table and a tension sensor mounted on one side of the positioning table, the tension sensor is provided with a bearing block away from one side of the positioning table, one side of the bearing block is rotatably connected with a second bidirectional screw rod, the outer side wall of the second bidirectional screw rod is threadedly connected with two second positioning blocks, and one end of the product away from the positioning mechanism is inserted between the two second positioning blocks and is connected through a corresponding set of plug-in assemblies.

[0014] The latch mechanism further comprises a supporting rod connected to the middle of the inner side wall of the latch sleeve and springs arranged at both ends of the supporting rod, and one end of the spring away from the supporting rod is in abutment with one end of the corresponding latch body.

[0015] The outer side wall of the latch sleeve is symmetrically provided with two sliding grooves, the outer side wall of each of the two latch bodies is connected with a convex column, the two convex columns are arranged in a corresponding mode with the two sliding grooves, and the convex column is inserted into the inside of the corresponding sliding groove.

[0016] The application further provides that the inner walls of the two chutes are provided with two extension grooves, and the inner walls of the two extension grooves are provided with placing grooves matched with the chutes.

[0017] The application further provides that each set of auxiliary mechanisms comprises auxiliary rods, two auxiliary rods corresponding to the positioning mechanisms are respectively inserted into the interiors of the two first positioning blocks, two auxiliary rods corresponding to the testing mechanisms are respectively inserted into the interiors of the two second positioning blocks, the outer side walls of each auxiliary rod are connected with first taper rings, the outer side walls of the auxiliary rods are threadedly connected with second taper rings, the second taper rings and the first taper rings are oppositely arranged, and the outer side walls of the auxiliary rods and located between the second taper rings and the first taper rings are sleeved with expansion sleeves.

[0018] The application further provides that the side, opposite to the auxiliary rod, of the bolt body is connected with two second protrusions, the bolt body is provided with a groove opposite to the auxiliary rod, the interior of the groove is connected with two first protrusions, and the two first protrusions are matched with the two second protrusions.

[0019] In summary, the application has at least one of the following beneficial technical effects:

[0020] (1) The bolt sleeve is inserted into the product hole first, and then the bolt body is inserted into the large hole of the positioning block under the spring force, so that the positioning is completed. When the bolt body is not aligned with the bolt hole, the bolt body will be stopped on the side wall of the positioning block. The worker only needs to adjust the position of the end of the product to automatically pop the bolt body into the hole. The worker does not need to rely on visual observation of the hole alignment state. Even if the hand shakes slightly, the bolt body can be smoothly inserted into the large hole of the positioning block. The difficulty of insertion is reduced, and the problem of delayed alignment caused by visual obstruction is solved.

[0021] (2) The auxiliary mechanism is used to press and rotate the bolt body, and the convex column, the chute and the placing groove are used to complete the locking of the bolt body. The locking of the bolt body when it is matched with the product can be realized without repeated adjustment of the position of the bolt. At the same time, the spring force can keep the bolt body stable in the retracted or extended state, avoiding loosening or displacement during manual adjustment, and improving the convenience of positioning operation.

[0022] (3) The auxiliary rod, the expansion sleeve, the first taper ring and the second taper ring of the auxiliary mechanism are used to expand the expansion sleeve to fix the bolt mechanism and the bolt hole of the positioning block coaxially without shaking, so as to reduce the delay and instantaneous jump of force transmission, capture the initial force value of the product and improve the accuracy of test data.

[0023] (4) By adjusting the distance between the first positioning block and the second positioning block to clamp and position the product, the coaxiality of the product, the bolt mechanism and the positioning block is ensured, so that the radial force is reduced, the force value collected by the sensor is closer to the true value, and the effect of avoiding data deviation caused by additional load is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0025] Figure 2 It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 1

[0026] Figure 3 It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 2

[0027] Figure 4 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0028] Figure 5 It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 4

[0029] It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 6

[0030] It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 7

[0031] It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 8 Figure 7 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0032] Figure 9 Figure 7 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0033] Figure 10 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0034] Figure 11 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0035] Figure 12 It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 11

[0036] It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 13 Figure 11 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0037] Figure 14 It is a schematic diagram of the overall structure of the push-pull force testing device.

[0038] Figure 15 It is a schematic diagram of the overall structure of the push-pull force testing device. Figure 14 ​​​​​The schematic diagram of the explosion structure.

[0039] Figure 16 The schematic diagram of normal thrust curve in the test process.

[0040] Figure 17 The schematic diagram of abnormal thrust curve in the test process.

[0041] Figure 18 The schematic diagram of the comparison between normal thrust curve and abnormal thrust curve.

[0042] Label explanation: 1, workbench; 2, protective cover;

[0043] 3, load assembly; 31, sliding table; 32, sliding block; 33, guide rail; 35, rack;

[0044] 34, driving mechanism; 341, vertical plate; 342, driving motor; 343, gear; 344, box body;

[0045] 4, positioning assembly; 41, positioning mechanism; 411, positioning seat; 412, first positioning block; 413, first bidirectional screw rod;

[0046] 42, test mechanism; 421, positioning table; 422, tension sensor; 423, bearing block; 424, second bidirectional screw rod; 425, second positioning block;

[0047] 5, product;

[0048] 6, plug-in assembly; 61, plug-in mechanism; 611, plug-in sleeve; 612, plug-in body; 613, first protruding block; 614, supporting rod; 615, spring; 616, sliding groove; 617, protruding column;

[0049] 62, auxiliary mechanism; 621, auxiliary rod; 622, first conical ring; 623, second conical ring; 624, expansion sleeve; 625, second protruding block. DETAILED DESCRIPTION

[0050] It should be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0051] It should be noted that, unless otherwise specified, all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled person in the technical field to which the present application belongs.

[0052] Please refer to Figures 1-18 The present application provides the following technical solutions:

[0053] Embodiment one, a push-pull force testing device, comprising a workbench 1, a protective cover 2 mounted on the top of the workbench 1, the top of the workbench 1 is slidably connected with a load assembly 3, the two sides of the protective cover 2 are in a through state, the protective cover 2 is used for protecting the load assembly 3 during sliding, and the specific structure of the load assembly 3 is as follows:

[0054] Referring to Figures 1-3 , the load assembly 3 comprises a sliding table 31 slidably connected to the top of the workbench 1, two guide rails 33 are symmetrically mounted on the top of the workbench 1, and a sliding block 32 is slidably connected to the top of the two guide rails 33, and the sliding block 32 is mounted on the bottom of the sliding table 31. Through the sliding block 32, the sliding table 31 slides on the top of the guide rail 33, and the sliding table 31 can be guided. The top of the sliding table 31 is provided with a driving mechanism 34, and the driving mechanism 34 is used for driving the sliding table 31 to move. The specific structure of the driving mechanism 34 is as follows:

[0055] Referring to Figures 1-3 , the driving mechanism 34 comprises a box body 344 mounted on the top of the sliding table 31 and a vertical plate 341 mounted on one side of the box body 344, the vertical plate 341 is provided with a driving motor 342 on one side, and the other side of the vertical plate 341 is provided with a gear 343, the gear 343 is located in the box body 344, the output end of the driving motor 342 extends into the box body 344 and is connected with the gear 343, and the top of the workbench 1 is provided with a rack 35, the driving mechanism 34 is matched with the rack 35, the teeth of the gear 343 are engaged with the top of the rack 35, when the driving motor 342 is started, the output end drives the gear 343 to rotate, because the teeth of the gear 343 are engaged with the rack 35, the sliding table 31 makes a linear sliding motion on the guide rail 33, and the box body 344 protects the vertical plate 341, the driving motor 342 and the gear 343 to a certain extent, preventing foreign matters from entering and affecting the normal work.

[0056] Referring to Figures 1-4 , the top of the workbench 1 is provided with a positioning assembly 4, the positioning assembly 4 comprises a positioning mechanism 41 mounted on the top of the workbench 1 and a testing mechanism 42 mounted on the top of the sliding table 31, and the positioning mechanism 41 and the testing mechanism 42 are provided with a product 5 therebetween, the positioning mechanism 41 and the testing mechanism 42 are matched to position the product 5, and then the product 5 is tested by the extension and retraction movement and the walking of the sliding table 31.

[0057] Referring to Figures 4-7Two sets of plug-in assemblies 6 are arranged between the positioning mechanism 41 and the testing mechanism 42, each set of plug-in assemblies 6 includes a plug-in mechanism 61 and two sets of auxiliary mechanisms 62; the plug-in assemblies 6 are used to position and install the product 5 to the positioning mechanism 41 and the testing mechanism 42, that is, the plug-in mechanism 61 serves as the plug-in body, and the two sets of auxiliary mechanisms 62 are used to lock the plug-in mechanism 61.

[0058] Referring to Figures 5-9 The positioning mechanism 41 includes a positioning seat 411 mounted on the top of the workbench 1 and two first positioning blocks 412 slidingly connected to one side of the positioning seat 411, one end of the product 5 is inserted between the two first positioning blocks 412 and is inserted and arranged by a corresponding set of plug-in assemblies 6, when the product 5 is connected with the positioning mechanism 41, one end of the product 5 is inserted between the two first positioning blocks 412, and then a set of plug-in assemblies 6 is used for plug-in positioning.

[0059] Referring to Figures 5-9 The testing mechanism 42 includes a positioning table 421 mounted on the top of the sliding table 31 and a tension sensor 422 mounted on one side of the positioning table 421, the tension sensor 422 is mounted with a bearing block 423 away from one side of the positioning table 421, one side of the bearing block 423 is provided with two second positioning blocks 425, and one end of the product 5 away from the positioning mechanism 41 is inserted between the two second positioning blocks 425 and is inserted and arranged by a corresponding set of plug-in assemblies 6, after one end of the product 5 is positioned between the two first positioning blocks 412, the other end of the product 5 is inserted between the two second positioning blocks 425 by the worker, and then the corresponding plug-in assemblies 6 are used for plug-in positioning.

[0060] After the product 5 is positioned, the product 5 is started and controlled to extend at a rated speed, at this time, the load assembly 3 moves synchronously at the same moving speed, in this process, the tension sensor 422 can test the thrust data of the product 5 in real time, conversely, when the product 5 is retracted, the load assembly 3 moves synchronously at the same moving speed, in this process, the tension sensor 422 tests the tension data of the product 5 in real time.

[0061] And when the product 5 is fully extended, the load is kept unchanged, that is, static pressure maintaining, and the force value attenuation within 10 minutes is recorded, if the force value continues to decrease, it may be that there is a problem such as structural deformation in the product 5.

[0062] Similarly, other load value tests are sequentially arranged, and the extension, pressure maintaining and retraction processes are repeated, and the thrust and tension data under each load are recorded synchronously, if the thrust and tension under all loads meet the standards, are not stuck and attenuate, it is determined to be qualified, if the thrust and tension under one of the loads are insufficient and the force value attenuates by more than 10% after the cycle extension and retraction, it is determined to be unqualified.

[0063] In the second embodiment, the product 5 is positioned by inserting one end of the product 5 into the positioning block, and then the worker inserts the pins through the pin holes of the product 5 and the positioning block, and then the positioning is completed. During this process, the worker needs to repeatedly adjust the height of the product 5 to complete the insertion of the pins. The worker is easily blocked by the product 5 and the tooling fixture, forming a visual blind area, and cannot directly observe the real-time alignment state of the hole. The worker can only rely on repeated visual confirmation to determine the alignment, which leads to a lag in alignment determination.

[0064] Therefore, the plug-in assembly 6 is further improved.

[0065] Referring to Figures 8-10 Each set of pin mechanism 61 includes a pin sleeve 611 and two pin bodies 612. The two pin bodies 612 are inserted into the corresponding pin sleeve 611. The pin body 612 corresponding to the positioning mechanism 41 is inserted into the corresponding positioning mechanism 41 when it is extended. The pin body 612 corresponding to the testing mechanism 42 is inserted into the corresponding testing mechanism 42 when it is extended.

[0066] When the product 5 is positioned with the positioning mechanism 41 and the testing mechanism 42, the worker first inserts the pin mechanism 61 into the pin holes at both ends of the product 5. The selected pin sleeve 611 has the same size as the pin hole on the product 5. In this state, the pin body 612 is retracted inside the pin sleeve 611. Then the worker inserts one end of the product 5 between the two first positioning blocks 412. Then the pin body 612 extends from the inside of the pin sleeve 611 and is inserted into the pin hole in the side wall of the first positioning block 412. At this time, the product 5 and the first positioning block 412 are inserted.

[0067] Then the worker inserts the other end of the product 5 between the two second positioning blocks 425. Then the pin body 612 extends from the inside of the pin sleeve 611 and is inserted into the pin hole in the side wall of the second positioning block 425. At this time, the product 5 and the second positioning block 425 are inserted.

[0068] Referring to Figures 10-13 The pin mechanism 61 also includes a support rod 614 connected to the middle of the inner side wall of the pin sleeve 611 and a spring 615 arranged at both ends of the support rod 614. One end of the spring 615 away from the support rod 614 is in contact with one end of the corresponding pin body 612. When the pin body 612 is inserted into the pin sleeve 611, the spring 615 is in a compressed state. When the spring 615 is extended, the pin body 612 extends from the inside of the pin sleeve 611.

[0069] Referring to Figures 10-13The outer side wall of the latch sleeve 611 is symmetrically provided with two sliding grooves 616, the outer side wall of each of the two latch bodies 612 is connected with a protruding column 617, the two protruding columns 617 are correspondingly arranged with the two sliding grooves 616, the protruding column 617 is inserted into the corresponding sliding groove 616, the inner wall of each of the two sliding grooves 616 is provided with two extension grooves, and the inner wall of each of the two extension grooves is provided with a placing groove matched with the sliding groove 616. When the latch body 612 is retracted in the latch sleeve 611, the protruding column 617 synchronously slides in the corresponding sliding groove 616, thereby guiding and preventing the latch body 612 from falling off. When the latch body 612 needs to be in the retracted state, the latch body 612 only needs to be pressed into the interior of the latch sleeve 611, that is, the protruding column 617 slides to the position of one of the extension grooves on the side wall of the sliding groove 616, and then the latch body 612 is rotated, the protruding column 617 slides into the extension groove and is clamped in the placing groove. At this time, the spring 615 is in a compressed state, and the protruding column 617 is pressed in the placing groove under the influence of the elastic force of the spring 615. The latch body 612 is retracted in the latch sleeve 611 and remains stable. When the latch body 612 needs to be extended, the latch body 612 only needs to be pressed, the protruding column 617 slides from the placing groove to the position of the extension groove, and then the latch body 612 is rotated to move the protruding column 617 to the position of the sliding groove 616. At this state, the spring 615 pushes the latch body 612 out of the interior of the latch sleeve 611. After the latch body 612 is pushed out, it is rotated again, the protruding column 617 slides into the other corresponding extension groove again, and the protruding column 617 is clamped in the corresponding placing groove under the influence of the elastic force of the spring 615. At this time, the latch body 612 is in an extended stable state.

[0070] Specifically, if the latch is inserted manually, the staff needs to first insert the latch into the latch hole in the side wall of one of the first positioning blocks 412, and then adjust the position of the inserted latch and the position of the latch hole at the end of the product 5. In order to enable the first positioning block 412 to adapt to the insertion of products 5 of different sizes, the latch hole on the first positioning block 412 needs to be larger than the size of the latch hole on the product 5. At this time, the staff needs to face the situation of inserting the latch from a large hole to a small hole. At this time, the moving range of the latch in the large hole is larger, and the staff manually adjusts the product 5, and the hand will slightly shake. It is difficult for the latch to align with the small hole and be inserted. The staff needs to visually observe the position of the hole and then align.

[0071] When the staff inserts the latch mechanism 61 into the latch hole at one end of the product 5, the end of the product 5 is inserted between the two first positioning blocks 412, and then the latch body 612 is pressed and rotated, the latch body 612 can be extended from the corresponding latch sleeve 611, because the latch body 612 is affected by the elastic force of the spring 615 and maintains the pushing force, and the size of the latch hole in the side wall of the first positioning block 412 is large, the latch body 612 can be inserted into the latch hole in the side wall of the first positioning block 412, if not inserted, the latch body 612 is on the side wall of the first positioning block 412, in this state, the staff only needs to adjust the position of the end of the product 5, when the latch body 612 is moved to the position of the latch hole in the side wall of the first positioning block 412, the latch body 612 can be inserted, after the insertion is completed, the latch body 612 is locked in the extended state by rotating the latch body 612 again, and the insertion mode of the product 5 and the two second positioning blocks 425 is the same as the above mode.

[0072] That is, the embodiment adopts the mode of first adapting to the small hole and then inserting the latch body 612 into the large hole, which does not require the staff to visually observe the alignment state of the hole and adjusts the hole through the pop-in insertion of the latch body 612, thereby improving the positioning convenience.

[0073] In addition, during the test, because the sizes of the latch holes of different products 5 are different, the sizes of the latch holes in the first positioning blocks 412 and the second positioning blocks 425 of the test device need to be set to be large to facilitate the positioning of products 5 of different sizes, at this time, if the sizes of the latch holes in the first positioning blocks 412 or the second positioning blocks 425 and the latch are different, the test data will fluctuate, that is, when the product 5 is stretched or shortened, the latch mechanism 61 will move first, and the latch body 612 will move in the latch hole of the first positioning block 412 or the second positioning block 425, and the pull sensor 422 can detect the pushing force and the pulling force when the latch body 612 contacts the corresponding latch hole and applies a pushing force or a pulling force, which will affect the accuracy of the test data. Therefore, the test data fluctuation problem exists in the conventional latch with the same diameter or the structure of the latch mechanism 61 in the above embodiment.

[0074] For example, when the product 5 is started to stretch, the latch body 612 will shake in the corresponding latch hole, at the beginning, the latch body 612 does not contact the wall of the latch hole, and the pushing force cannot be transmitted, when the product 5 is stretched to the point that the latch body 612 contacts the wall of the latch hole, the force will suddenly hit the test device, and the data measured by the pull sensor 422 will jump up instantaneously, on the contrary, when the product 5 is contracted, the latch body 612 will also have the same situation, which will cause the test data to fluctuate.

[0075] And the initial stage product 5 stretch, the plug body 612 is also in the plug hole displacement, the force can not be transmitted to the tension sensor 422, when the plug body 612 contacts the hole wall, product 5 has passed the initial starting stage, the tension sensor 422 captures is halfway force rather than initial force.

[0076] For this purpose, refer to Figure 14 And Figure 15 Each set of auxiliary mechanism 62 includes auxiliary rod 621, and the two auxiliary rods 621 corresponding to the positioning mechanism 41 are respectively inserted into the interiors of the two first positioning blocks 412, and the two auxiliary rods 621 corresponding to the test mechanism 42 are respectively inserted into the interiors of the two second positioning blocks 425, the side opposite to the plug body 612 of the auxiliary rod 621 is connected with two second protrusions 625, the side opposite to the auxiliary rod 621 of the plug body 612 is provided with a recess, the interior of the recess is connected with two first protrusions 613, and the two first protrusions 613 are matched with the two second protrusions 625.

[0077] Refer to Figures 11-15 The end of the auxiliary rod 621 close to the corresponding plug body 612 is connected with a convex rod, and the end of the convex rod is provided with a circular chamfer, a through hole is formed in the center position of the end recess of the plug body 612, and a tapered portion is arranged at the opening of the through hole, and the convex rod is matched with the through hole.

[0078] When the plug body 612 is inserted into the plug hole of the end of the product 5, and the worker inserts the product 5 between the two first positioning blocks 412, the worker inserts the auxiliary mechanism 62 into the plug hole of the first positioning block 412, then the convex rod at the end of the auxiliary rod 621 first abuts against the tapered portion, and then slides along the tapered portion to adjust the coaxiality, when the convex rod is inserted into the through hole, the auxiliary rod 621 continues to move and is inserted into the recess, and the first protrusion 613 and the second protrusion 625 are in a misaligned state, then the worker extrudes and rotates the plug body 612 by pushing the auxiliary rod 621, the second protrusion 625 abuts against the first protrusion 613 and continues to rotate, the first protrusion 613 drives the plug body 612 to rotate, that is, the plug body 612 drives the convex column 617 to separate from the placing groove and slide into the sliding groove 616 through the extension groove, then the spring 615 pushes the plug body 612 to extend out of the plug sleeve 611 and is inserted into the plug hole of the first positioning block 412, then the plug body 612 is rotated again by the auxiliary rod 621, and then the plug body 612 is locked in the extended state, conversely, the plug body 612 is rotated and contracted by the auxiliary rod 621, and then the plug body 612 is locked in the contracted state, and the operation steps of the second positioning block 425 and the corresponding plug mechanism 61 are as above.

[0079] Refer to Figure 14 And Figure 15The outer side wall of each auxiliary rod 621 is connected with a first taper ring 622, the outer side wall of the auxiliary rod 621 is threadedly connected with a second taper ring 623, the second taper ring 623 and the first taper ring 622 are oppositely arranged, and the outer side wall of the auxiliary rod 621 and located between the second taper ring 623 and the first taper ring 622 is sleeved with a swelling sleeve 624. When the auxiliary rod 621 is inserted into the bolt hole inside the corresponding first positioning block 412 or the second positioning block 425, the first taper ring 622 and the swelling sleeve 624 are both inside the corresponding bolt hole. The worker rotates the second taper ring 623 to extrude the swelling sleeve 624, the other end of the swelling sleeve 624 is extruded through the first taper ring 622, so that the swelling sleeve 624 expands, the swelling sleeve 624 is expanded inside the corresponding bolt hole, and the corresponding bolt mechanism 61 is lifted and positioned at the same time, that is, the bolt mechanism 61 and the auxiliary mechanism 62 are coaxially connected. In this state, the bolt mechanism 61 will not shake in the corresponding bolt hole, thereby ensuring the stability of the data during testing.

[0080] However, because there is a gap between the two ends of the product 5 and the two first positioning blocks 412 or the two second positioning blocks 425, when installing the product 5, if the axis of the product 5 deviates from the installation design axis, the product 5 may be forcibly moved to align the hole position during subsequent positioning of the other end of the product 5, which may cause misalignment and result in testing errors.

[0081] During testing, the push-pull force will generate a radial component, and the force value collected by the tester sensor includes an additional radial load, resulting in larger or smaller data (for example, the actual product 5 push force is 1000N, and due to the radial component, it may be displayed as 1050N or 950N), which cannot reflect the true performance.

[0082] Therefore, referring to Figures 6-8 , one side of the positioning seat 411 is rotationally connected with a first bidirectional screw rod 413, the two first positioning blocks 412 are threadedly connected to the outer side wall of the first bidirectional screw rod 413, one side of the bearing block 423 is rotationally connected with a second bidirectional screw rod 424, and the outer side wall of the second bidirectional screw rod 424 is threadedly connected with two second positioning blocks 425. When the bolt body 612 is inserted into the bolt hole inside the first positioning block 412 or the second positioning block 425, the distance between the two first positioning blocks 412 or the two second positioning blocks 425 is adjusted by adjusting the first bidirectional screw rod 413 or the second bidirectional screw rod 424, the two first positioning blocks 412 are moved closer to each other to clamp one end of the product 5, and the two second positioning blocks 425 are moved closer to each other to clamp the other end of the product 5. At this time, the alignment of the two ends of the product 5 can be ensured, and then the auxiliary mechanism 62 is expanded to complete the locking, thereby ensuring the coaxiality of the bolt mechanism 61, the product 5 and the first positioning block 412 or the second positioning block 425 and reducing the fluctuation of the data caused by shaking.

[0083] The thrust test procedure of product 5 in embodiment four is as follows:

[0084] The product 5 is connected to the test device: the product 5 is positioned on the test device, that is, the output end of the product 5 is stretched out in the same direction as the force direction of the tension sensor 422.

[0085] Initialization state: control the product 5 to be completely retracted, and clear the force value and displacement data of the tension sensor 422.

[0086] Start the test: power on the product 5, control it to stretch out at the set speed; at the same time, start the load assembly 3 to move, and load the rated thrust and pull force of the product 5, and the tension sensor 422 records the thrust force value in real time.

[0087] When the product 5 is completely stretched out, the power of the product 5 is turned off, the data collection is stopped, the maximum thrust in the whole process is recorded, and then the product 5 starts to retract in the completely stretched out state, the load assembly 3 loads the same load, and the tension sensor 422 can record the pull force value of the product 5 in real time. After the product 5 reciprocates, it can be judged whether the product 5 is qualified.

[0088] The normal positioning mode of the product 5 and the test device is that the pin hole at the end of the product 5 is placed opposite to the first positioning block 412 or the second positioning block 425, and then the pin is used for positioning.

[0089] As shown in Figure 17 and Figure 18 , after the product 5 is positioned by the normal positioning mode, the measured data will fluctuate, and the specific reason is that because the sizes of the pin holes of different products 5 are different, the pin holes on the first positioning block 412 and the second positioning block 425 of the test device need to be set to be large in size, so as to facilitate the positioning of products 5 of different sizes. At this time, if the size difference between the pin and the pin hole on the first positioning block 412 or the second positioning block 425 is large, the product 5 will first push the pin to move, and the pin will slide in the pin hole on the side wall of the first positioning block 412 or the second positioning block 425.

[0090] Pin shaking stage: 0-0.5s, thrust is almost 0 (the pin does not contact the pin hole wall).

[0091] Impact stage: 0.5-0.7s, when the pin collides with the pin hole on the side wall of the first positioning block 412 or the second positioning block 425, the measured data will jump up instantaneously, and the jump force value will suddenly exceed the rated value.

[0092] Stable stage: 0.7-7s, keep the maximum thrust, the force value tends to be stable (with slight oscillation).

[0093] Stop stage: 7-10s, the thrust linearly decreases to 0.

[0094] Conversely, when the product 5 is contracted, the measured data is the same as the change process of the data when it is stretched.

[0095] The initial stretching and initial shortening push-pull force test of the product 5 is particularly important relative to the overall stroke test, which can expose mechanical stress concentration, motor starting resistance and other problems at the initial limit position.

[0096] The conventional connection mode will cause the product 5 test data missing and data fluctuation error, which affects the accuracy of the overall test data.

[0097] And by setting the auxiliary rod 621, the expansion sleeve 624, the first taper ring 622 and the second taper ring 623 and other structures of the auxiliary mechanism 62, the expansion sleeve 624 is expanded and fixed, so that the bolt mechanism 61, the auxiliary mechanism 62 and the positioning block bolt hole are coaxial and do not shake.

[0098] As shown in Figure 16 and Figure 18 The improved test stage data changes as follows:

[0099] Stage 1: 0-0.5s, the push force is quickly increased to the maximum.

[0100] Stage 2: 0.5-7s, keep the maximum push force.

[0101] Stage 3: 7-10s, the push force is linearly reduced to 0.

[0102] Therefore, by improving the bolt mechanism 61 and the auxiliary mechanism 62, the shaking of the product 5 during stretching or contraction is reduced, the force transmission delay and instantaneous jump are reduced, the initial force value of the product 5 is captured, and the test data accuracy is improved.

[0103] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

Claims

1. A push-pull force testing device, characterized by: It includes a workbench (1), a protective cover (2) mounted on the top of the workbench (1), and a load assembly (3) slidably connected to the top of the workbench (1), the load assembly (3) including a slide (31) slidably connected to the top of the workbench (1). The top of the workbench (1) is provided with a positioning component (4), which includes a positioning mechanism (41) installed on the top of the workbench (1) and a testing mechanism (42) installed on the top of the slide (31). A product (5) is provided between the positioning mechanism (41) and the testing mechanism (42). Two sets of plug-in components (6) are provided between the positioning mechanism (41) and the testing mechanism (42). Each set of plug-in components (6) includes a pin mechanism (61) and two sets of auxiliary mechanisms (62). Each of the aforementioned pin mechanisms (61) includes a pin sleeve (611) and two pin bodies (612). The two pin bodies (612) are inserted into the corresponding pin sleeve (611). When the pin body (612) corresponding to the positioning mechanism (41) extends out, it passes through the corresponding positioning mechanism (41). When the pin body (612) corresponding to the testing mechanism (42) extends out, it passes through the corresponding testing mechanism (42). The positioning mechanism (41) includes a positioning seat (411) installed on the top of the workbench (1) and two first positioning blocks (412) slidably connected to one side of the positioning seat (411). A first bidirectional lead screw (413) is rotatably connected to one side of the positioning seat (411). The two first positioning blocks (412) are threaded to the outer side wall of the first bidirectional lead screw (413). One end of the product (5) is inserted between the two first positioning blocks (412) and is connected by a corresponding set of plug-in components (6). Each set of auxiliary mechanisms (62) includes an auxiliary rod (621). Two auxiliary rods (621) corresponding to the positioning mechanism (41) are respectively inserted into the interior of two first positioning blocks (412). Two auxiliary rods (621) corresponding to the testing mechanism (42) are respectively inserted into the interior of two second positioning blocks (425). A first conical ring (622) is connected to the outer wall of each auxiliary rod (621). A second conical ring (623) is threaded to the outer wall of the auxiliary rod (621). The second conical ring (623) and the first conical ring (622) are arranged opposite to each other. An expansion sleeve (624) is sleeved on the outer wall of the auxiliary rod (621) between the second conical ring (623) and the first conical ring (622).

2. The push-pull force testing device of claim 1, wherein: The load assembly (3) also includes two guide rails (33) symmetrically mounted on the top of the worktable (1), with a slider (32) slidably connected to the top of the two guide rails (33), the slider (32) being mounted on the bottom of the slide table (31), and a drive mechanism (34) being mounted on the top of the slide table (31).

3. The push-pull force testing device of claim 2, wherein: A rack (35) is installed on the top of the worktable (1). The drive mechanism (34) is configured to cooperate with the rack (35). The drive mechanism (34) includes a housing (344) installed on the top of the slide (31) and a vertical plate (341) installed on one side of the housing (344). A drive motor (342) is installed on one side of the vertical plate (341), and a gear (343) is installed on the other side of the vertical plate (341). The gear (343) is located inside the housing (344). The output end of the drive motor (342) extends into the interior of the housing (344) and is connected to the gear (343). The teeth of the gear (343) mesh with the top of the rack (35).

4. The push-pull force testing device of claim 1, wherein: The testing mechanism (42) includes a positioning platform (421) installed on the top of the slide (31) and a tension sensor (422) installed on one side of the positioning platform (421). A bearing block (423) is installed on the side of the tension sensor (422) away from the positioning platform (421). A second bidirectional lead screw (424) is rotatably connected to one side of the bearing block (423). Two second positioning blocks (425) are threaded to the outer wall of the second bidirectional lead screw (424). One end of the product (5) away from the positioning mechanism (41) is inserted between the two second positioning blocks (425) and is connected by a corresponding set of plug-in components (6).

5. The push-pull force testing device of claim 1, wherein: The pin mechanism (61) further includes a support rod (614) connected to the middle of the inner wall of the pin sleeve (611) and springs (615) disposed at both ends of the support rod (614). The end of the spring (615) away from the support rod (614) is in contact with one end of the corresponding pin body (612).

6. The push-pull force testing device according to claim 5, characterized in that: The outer side wall of the pin sleeve (611) is symmetrically provided with two sliding grooves (616), and the outer side walls of the two pin bodies (612) are connected with protrusions (617). The two protrusions (617) are correspondingly provided with the two sliding grooves (616), and the protrusions (617) are inserted into the interior of the corresponding sliding grooves (616).

7. The push-pull force testing device according to claim 6, characterized in that: The inner walls of the two slides (616) each have two extension grooves, and the inner walls of the two extension grooves each have a placement groove that is compatible with the slide (616).

8. The push-pull force testing device according to claim 1, characterized in that: The auxiliary rod (621) is connected to two second protrusions (625) on the side opposite to the pin body (612). The pin body (612) is provided with a groove on the side opposite to the auxiliary rod (621). The groove is connected to two first protrusions (613), and the two first protrusions (613) are adapted to the corresponding two second protrusions (625).

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