Dynamic characteristic testing mechanism for heavy buffer assembly

Abstract

The invention discloses a dynamic characteristic testing mechanism for a heavy buffer assembly, and belongs to the field of dynamic characteristic testing of buffers. A heavy buffer assembly dynamic characteristic testing mechanism comprises a bottom plate and further comprises a positioning frame fixedly connected to the bottom plate, a drop hammer is slidably connected into the positioning frame and composed of a plurality of mass blocks and a mounting plate, and the mass blocks are fixedly connected with the mounting plate; the mounting bracket is connected to the bottom of the mounting plate, and a buffer assembly body is connected in the mounting bracket; the collision plate is fixedly connected to the bottom of the mounting bracket, and the bottom of the collision plate is fixedly connected with a collision anvil head; the fixing plate is fixedly connected to the bottom plate, and a collision cushion block is fixedly connected to the fixing plate; the fixing frame is fixedly connected to the top of the positioning frame, a detacher is connected to the fixing frame in a sliding mode, and the detacher can grab and release the drop hammer; the method has remarkable advantages in the aspects of collision poses, test precision improvement, test capability expansion and the like.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic characteristic testing of buffer components, and in particular to a dynamic characteristic testing mechanism for heavy-duty buffer components. Background Art

[0002] The main function of the buffer component is to reduce the impact of shock, vibration and vibration in the moving or vibrating system to provide a smoother and more comfortable operating environment. The following are the main functions of the buffer component: Reduce vibration and shock: Buffer components reduce the vibration amplitude and frequency of structures and equipment by absorbing and dispersing incoming shock and vibration energy, thereby reducing interference with the surrounding environment and damage to equipment; Provide shock absorption protection: Buffer components play a buffering and protective role in the motion system to prevent sudden impact and vibration from damaging parts, equipment and products. They are widely used in automotive suspension systems, industrial machinery and building structures. Improve comfort: Buffer components can reduce the bumps and vibrations in vehicles, elevators, computer chairs, etc., providing a smoother and more comfortable riding experience; Enhanced safety: Cushioning components help improve the stability and safety of equipment and structures. In vehicles and sports equipment, effective cushioning components can provide better handling and braking effects, reducing the risk of accidents; Protect equipment and products: Buffer components can reduce the damage to equipment and products caused by vibration and shock in the motion system; in applications such as precision instruments and electronic equipment, buffer components can protect the equipment from external vibrations and ensure its normal operation.

[0003] Cushioning components play an important role in various industrial, transportation and construction fields, providing benefits such as smooth operation, comfort, safety and equipment protection.

[0004] The dynamic characteristics of the buffer component, as the parameter input of the design analysis, are the guarantee of the buffer effect and the key to the design selection and application matching of the buffer component. It directly affects the design implementation effect. Therefore, special attention is paid to the dynamic characteristics of the buffer component, especially the dynamic characteristics under transient loads, and its dynamic characteristics need to be obtained through experimental testing.

[0005] It can be seen that the performance of buffer components is also related to the further development of various industries, especially in aerospace and marine equipment. The quality of buffer component performance directly affects the various capabilities of aerospace and marine equipment. At present, my country has achieved mature results in the research on the static characteristics of buffer components. With the development of various industries around the world, the dynamic characteristics of buffer components under transient loads have become parameters of design concern. In order to further enhance the capabilities of our related equipment, research on the dynamic characteristics of buffer components under transient loads has also become an important focus.

[0006] However, the buffer component characteristic testing equipment on the market is mainly spring tension and compression testing machines, which have low energy levels and small installation space, and can only complete static and small-scale load dynamic tests, and cannot carry out performance testing research under transient large loads. In response to the demand for dynamic characteristic testing of heavy-duty buffer components with large loads under transient loads, the present invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to solve the problems existing in the prior art and to propose a dynamic characteristic testing mechanism for a heavy-duty buffer component.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A heavy-duty buffer component dynamic characteristics testing mechanism comprises a base plate and also comprises: A positioning frame fixedly connected to the bottom plate, wherein a drop weight is slidably connected in the positioning frame, wherein the drop weight comprises a first mass block, a second mass block and a mounting plate, wherein the first mass block, the second mass block and the mounting plate are fixedly connected; A mounting bracket connected to the bottom of the mounting plate, wherein a buffer assembly body is connected to the mounting bracket; A collision plate, fixedly connected to the bottom of the mounting bracket, wherein a collision anvil is fixedly connected to the bottom of the collision plate; A fixing plate, fixedly connected to the bottom plate, wherein a collision pad is fixedly connected to the fixing plate; The fixing frame is fixedly connected to the top of the positioning frame, and a dehooking device matched with the drop hammer is slidably connected to the fixing frame.

[0009] Preferably, the first mass block, the second mass block and the mounting plate are all connected with stud bolts, the top of the drop hammer is fixedly connected with a hook, the unhooker can grab and release the drop hammer through the hook, a guide rod is connected between the base plate and the fixed frame, a guide plate is provided on the outer wall of the mounting plate, the guide plate is slidably connected to the guide rod, the top of the mounting plate is provided with an upper rib, and the bottom surface of the mounting plate is provided with a mounting groove.

[0010] Furthermore, a cylinder is fixedly connected to the outer wall of the base plate, a piston is slidably connected in the cylinder, a fixing rod is fixedly connected to the top of the piston, a push plate is provided on the top of the fixing rod, the push plate is slidably connected to the guide rod, an air outlet pipe is provided on the outer wall of the cylinder, a nozzle is provided at the end of the air outlet pipe away from the cylinder, and the nozzle faces the collision pad.

[0011] Furthermore, a spring is provided between the inner wall of the cylinder and the piston, the spring is sleeved on the outer wall of the fixed rod, the outer wall of the cylinder is fixedly connected to a support plate, the air outlet pipe is connected to the support plate, and an air inlet pipe is also provided at the bottom of the cylinder, and both the air outlet pipe and the air inlet pipe are provided with a one-way valve.

[0012] Furthermore, the mounting bracket includes three types: an axial tension bracket, a transverse bracket and an axial compression bracket.

[0013] Preferably, the axial stretching bracket includes a first transverse plate, a second transverse plate, a third transverse plate and a fourth transverse plate, a first screw is connected between the first transverse plate and the third transverse plate, both ends of the first screw are threadedly connected with a first fixing nut, a second screw is connected between the second transverse plate and the fourth transverse plate, both ends of the second screw are respectively connected with a second fixing nut, the first transverse plate is installed in the mounting groove at the bottom of the mounting plate, the buffer assembly body is arranged between the second transverse plate and the third transverse plate, and the collision plate is fixedly connected to the bottom of the fourth transverse plate.

[0014] Preferably, the transverse bracket includes an intermediate limiting plate and two L-plates, both sides of the intermediate limiting plate are fixedly connected with the first vertical plate, the two L-plates are respectively arranged on both sides of the intermediate limiting plate, and the two L-plates are fixedly connected with the second vertical plate, the buffer component body is arranged between the first vertical plate and the second vertical plate located on the same side of the intermediate limiting plate, a third screw is connected between the first vertical plate and the second vertical plate located on the same side of the intermediate limiting plate, a third fixing nut is threadedly connected to the third screw, the two first vertical plates and the two buffer component bodies are fixedly connected to the intermediate limiting plate by locking bolts, the L-plate is fixedly connected to the bottom of the mounting plate, and the collision plate is fixedly connected to the bottom of the intermediate limiting plate and the first vertical plate.

[0015] Preferably, the axial compression bracket includes a connecting plate, a boss is arranged on the connecting plate, the boss is connected to the mounting groove at the bottom of the mounting plate, the buffer component body is arranged at the bottom of the connecting plate, and the collision plate is arranged at the bottom of the buffer component body.

[0016] Preferably, a winch and a pulley assembly are provided on the top of the fixing frame, a steel wire rope is connected to the winch, the steel wire rope passes through the pulley assembly and is connected to the unhooker, a guide shaft is also provided on the fixing frame, and the unhooker is slidably connected to the guide shaft.

[0017] Furthermore, the positioning frame is provided with ribs, the ribs are provided with placement grooves, and the placement grooves are used for placing and loading and unloading safety beams.

[0018] Compared with the prior art, the present invention provides a heavy-duty buffer component dynamic characteristics testing mechanism, which has the following beneficial effects: 1. The dynamic characteristics test mechanism of the heavy-duty buffer assembly, the drop hammer structure is guided by four guide rods, the buffer assembly body and the mounting bracket are fixed at the bottom of the drop hammer structure; the bottom of the guide rod is installed on the base plate through a positioning sleeve, and the top of the guide rod is positioned by a fixed frame to ensure the shape and position of the guide rod after assembly to avoid jamming of the drop hammer structure when it moves up and down; a collision pad is installed on the base plate to protect the base plate, and the collision pad is replaceable and can also be replaced with other materials according to test requirements; a lifting structure is installed on the top of the fixed frame, and the winch drives the shake control unhooker to grab, lift, and release the drop hammer structure after it is in place; the test action is controlled by a measuring and controlling instrument; the overall test bench has significant advantages in ensuring collision posture, improving test accuracy, and expanding test capabilities.

[0019] 2. The dynamic characteristic test mechanism of the heavy-duty buffer component, at the beginning of the collision test, the guide plate will slide on the guide rod. When the guide plate contacts the push plate, it will press the push plate to move downward, thereby driving the piston to move downward through the fixed rod, and then compressing the gas in the cylinder to make the gas spray out from the nozzle. On the one hand, it can blow away the dust and impurities on the surface of the collision pad to prevent dust and impurities from affecting the collision effect. Secondly, it can reduce the surface temperature of the collision pad and the collision anvil to avoid damage to the collision pad and the collision anvil and increase the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural schematic diagram of a dynamic characteristic testing mechanism for a heavy-duty buffer assembly proposed by the present invention; Figure 2 A schematic diagram of the structure of the first mass block, the second mass block and the mounting plate in a dynamic characteristic test mechanism of a heavy-duty buffer assembly proposed by the present invention Figure 1 ; Figure 3 A schematic diagram of the structure of the first mass block, the second mass block and the mounting plate in a dynamic characteristic test mechanism of a heavy-duty buffer assembly proposed by the present invention Figure 2 ; Figure 4 A cross-sectional schematic diagram of a cylinder in a dynamic characteristic testing mechanism for a heavy-duty buffer assembly proposed by the present invention; Figure 5 A schematic diagram of an axial tensile support structure for mounting a support in a dynamic characteristic test mechanism for a heavy-duty buffer assembly proposed by the present invention Figure 1 ; Figure 6 A schematic diagram of an axial tensile support structure for mounting a support in a dynamic characteristic test mechanism for a heavy-duty buffer assembly proposed by the present invention Figure 2 ; Figure 7 A schematic diagram of the structure of an axial tensile support in a dynamic characteristic testing mechanism for a heavy-duty buffer assembly proposed by the present invention Figure 1 ; Figure 8 A schematic diagram of the structure of an axial tensile support in a dynamic characteristic testing mechanism for a heavy-duty buffer assembly proposed by the present invention Figure 2 ; Fig. 9 A structural schematic diagram of a heavy-duty buffer component dynamic characteristics test mechanism in which the mounting bracket is a transverse bracket Figure 1 ; Fig.10 A structural schematic diagram of a heavy-duty buffer component dynamic characteristics test mechanism in which the mounting bracket is a transverse bracket Figure 2 ; Fig.11 A schematic diagram of the structure of a transverse support in a dynamic characteristics test mechanism for a heavy-duty buffer assembly proposed by the present invention Figure 1 ; Fig.12 A schematic diagram of the structure of a transverse support in a dynamic characteristics test mechanism for a heavy-duty buffer assembly proposed by the present invention Figure 2 ; Fig.13 This is a structural schematic diagram of an axial compression bracket installed in a dynamic characteristic testing mechanism of a heavy-duty buffer assembly proposed by the present invention; Fig.14 This is a schematic structural diagram of an axial compression bracket in a dynamic characteristic testing mechanism for a heavy-duty buffer assembly proposed by the present invention.

[0021] In the figure: 1, bottom plate; 101, positioning frame; 102, fixing frame; 103, winch; 104, pulley assembly; 105, guide shaft; 106, unhooking device; 107, guide rod; 108, fixing plate; 109, collision pad; 110, rib plate; 111, loading and unloading safety beam; 2, first mass block; 201, second mass block; 202, mounting plate; 203, guide plate; 204, upper rib; 205, mounting groove; 206, hook; 207, stud bolt; 208, collision plate; 209, collision anvil; 3, cylinder; 301, piston; 302, fixing rod; 303, push plate; 304 , spring; 305, outlet pipe; 306, inlet pipe; 307, nozzle; 308, support plate; 4, axial stretching bracket; 401, first horizontal plate; 402, second horizontal plate; 403, third horizontal plate; 404, fourth horizontal plate; 405, first screw; 406, first fixing nut; 407, second screw; 408, second fixing nut; 5, horizontal bracket; 501, middle limit plate; 502, first vertical plate; 503, locking bolt; 504, second vertical plate; 505, L plate; 506, third screw; 507, third fixing nut; 6, connecting plate; 601, boss; 7, buffer assembly body. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0024] Reference Figure 1-Figure 4A heavy-duty buffer component dynamic characteristics testing mechanism includes a base plate 1, and also includes a positioning frame 101 fixedly connected to the base plate 1, a drop hammer is slidably connected in the positioning frame 101, the drop hammer includes a first mass block 2, a second mass block 201 and a mounting plate 202, the first mass block 2, the second mass block 201 and the mounting plate 202 are fixedly connected; a mounting bracket connected to the bottom of the mounting plate 202, a buffer component body 7 is connected in the mounting bracket; a collision plate 208 is fixedly connected to the bottom of the mounting bracket, a collision anvil 209 is fixedly connected to the bottom of the collision plate 208; a fixed plate 108 is fixedly connected to the base plate 1, a collision pad 109 is fixedly connected to the fixed plate 108; a fixed frame 102 is fixedly connected to the top of the positioning frame 101, and a dehooker 106 cooperating with the first mass block 2 is slidably connected to the fixed frame 102.

[0025] The first mass block 2, the second mass block 201 and the mounting plate 202 are all connected with stud bolts 207. During testing, the two mass blocks are fixed to the mounting plate 202 by four M48 stud bolts 207. The top of the drop hammer is fixedly connected with a hook 206, and the unhooker 106 can grab and release the drop hammer through the hook 206. A guide rod 107 is connected between the base plate 1 and the fixed frame 102. A guide plate 203 is provided on the outer wall of the mounting plate 202, and the guide plate 203 is slidably connected to the guide rod 107. An upper rib 204 is provided on the top of the mounting plate 202, and a mounting groove 205 is provided on the bottom surface of the mounting plate 202.

[0026] In the present invention, the first mass block 2, the second mass block 201 and the mounting plate 202 form a drop hammer structure, which is guided by four guide rods 107, and the buffer assembly body 7 and the mounting bracket are fixed at the bottom of the drop hammer structure; the bottom of the guide rod 107 is installed on the base plate 1 through a positioning sleeve, and the top of the guide rod 107 is positioned by the fixing frame 102 to ensure the shape and position of the guide rod 107 after assembly, so as to avoid the drop hammer structure from getting stuck when moving up and down; a collision pad 109 is installed on the base plate 1 to protect the base plate 1, and the collision pad 109 is replaceable and can also be replaced with other materials according to test requirements; a lifting structure is installed on the top of the fixing frame 102, and the winch 103 drives the shaker unhooking device 106 to grab, lift, and release the drop hammer structure after it is in place; the test action is controlled by the measurement and control instrument; the overall test bench has significant advantages in ensuring the collision posture, improving the test accuracy, and expanding the test capacity.

[0027] The drop hammer structure consists of a mounting plate 202, a first mass block 2 and a second mass block 201. The mounting plate 202 weighs 5.2 tons, and a single mass block weighs 3.4 tons. The size of the mounting plate 202 is 1650×1500×400, and the weldment 1650 is connected to four guide plates 203, and the guide hole size is Φ160@1000×1800. Considering the lower limit of the test level, it is necessary to remove the weight of the mounting plate 202 and then supplement it with the mass block. Considering the operating space and installation space for loading and unloading force In order to improve the overall rigidity of the plate 202, it is chosen to remove weight at the upper and lower ends of the mounting plate 202, so that the space formed is just enough to accommodate the nut. A copper sleeve is arranged in the guide plate 203 to cooperate with the guide rod 107, and the guide aspect ratio is 2.5:1. Specifically, four through holes with a diameter of 50 mm are arranged on the mass block to be fixed to the mounting plate 202, and two M42 lifting holes are arranged on each side. Five groups of sensor mounting holes are arranged on the upper surface of the mass block, and each group consists of an M5 depth 8 and a 1 / 4-28 depth 8 threaded hole.

[0028] To ensure the shape and position dimensions after installation, the two ends of the guide rod 107 are respectively fixed to the base plate 1 and the fixing frame 102, and the positioning dimensions are guaranteed through processing; the base plate 1 is conveniently connected to the existing test foundation, and is made of Q235 steel, which can be welded and screwed; considering the convenience of replacement operation, the collision pad 109 is selected as a wearing part to extend the life of the collision anvil 209 and protect the base plate 1 at the same time. Threaded holes are set around the base plate 1 for leveling and lifting, and through holes of different sizes are also set to facilitate tamping and exhaust during the later test foundation production and connection with the test foundation.

[0029] The collision anvil 209 is made of spring steel 60Si2CrVA. After standard heat treatment, the surface hardness is above HRC55 and the yield strength can reach 1300MPa. This anvil has high strength and long service life, is suitable for strong impact applications, and has been verified in multiple strong impact machine projects. The collision pad 109 is installed on the base plate 1 and collides with the collision anvil 209 to protect the base plate 1 from being damaged. The effective action surface diameter of the collision pad 109 is Φ550, which is slightly larger than the diameter of the collision anvil 209. Its surface is flat and is installed on the base plate 1. It has a certain hardness and will not collapse after collision.

[0030] A cylinder 3 is fixedly connected to the outer wall of the base plate 1, a piston 301 is slidably connected inside the cylinder 3, a fixing rod 302 is fixedly connected to the top of the piston 301, a push plate 303 is provided on the top of the fixing rod 302, the push plate 303 is slidably connected to the guide rod 107, an air outlet pipe 305 is provided on the outer wall of the cylinder 3, a nozzle 307 is provided at the end of the air outlet pipe 305 away from the cylinder 3, and the nozzle 307 faces the collision pad 109.

[0031] A spring 304 is provided between the inner wall of the cylinder 3 and the piston 301, and the spring 304 is sleeved on the outer wall of the fixed rod 302. The outer wall of the cylinder 3 is fixedly connected to a support plate 308, and the air outlet pipe 305 is connected to the support plate 308. An air inlet pipe 306 is also provided at the bottom of the cylinder 3, and both the air outlet pipe 305 and the air inlet pipe 306 are provided with a one-way valve.

[0032] In the present invention, at the beginning of the collision test, the guide plate 203 will slide on the guide rod 107. When the guide plate 203 contacts the push plate 303, it will press the push plate 303 to move downward, thereby driving the piston 301 to move downward through the fixed rod 302, and then compressing the gas in the cylinder 3, so that the gas is discharged through the outlet pipe 305, and then sprayed out from the nozzle 307. Since the nozzle 307 is facing the collision pad 109, the dust and impurities on the surface of the collision pad 109 can be blown away, so as to avoid the dust and impurities from affecting the collision effect, and at the same time avoid causing damage to the collision pad 109 and the collision anvil 209, thereby improving the service life. The spring 304 is set to automatically reset the piston 301, and at the same time, it can take in air through the intake pipe 306 to facilitate repeated use. Both the outlet pipe 305 and the intake pipe 306 are provided with a one-way valve to ensure the normal use of the cylinder 3. Example

[0033] Reference Figure 5-Figure 8 A heavy-duty buffer component dynamic characteristics testing mechanism includes a base plate 1, and also includes a positioning frame 101 fixedly connected to the base plate 1, a drop hammer is slidably connected in the positioning frame 101, the drop hammer includes a first mass block 2, a second mass block 201 and a mounting plate 202, the first mass block 2, the second mass block 201 and the mounting plate 202 are fixedly connected; a mounting bracket connected to the bottom of the mounting plate 202, a buffer component body 7 is connected in the mounting bracket; a collision plate 208 is fixedly connected to the bottom of the mounting bracket, a collision anvil 209 is fixedly connected to the bottom of the collision plate 208; a fixed plate 108 is fixedly connected to the base plate 1, a collision pad 109 is fixedly connected to the fixed plate 108; a fixed frame 102 is fixedly connected to the top of the positioning frame 101, and a dehooker 106 cooperating with the first mass block 2 is slidably connected to the fixed frame 102.

[0034] The mounting bracket adopts an axial tension bracket 4.

[0035] The axial stretching bracket 4 includes a first transverse plate 401, a second transverse plate 402, a third transverse plate 403 and a fourth transverse plate 404, a first screw rod 405 is connected between the first transverse plate 401 and the third transverse plate 403, both ends of the first screw rod 405 are threadedly connected with a first fixing nut 406, a second screw rod 407 is connected between the second transverse plate 402 and the fourth transverse plate 404, both ends of the second screw rod 407 are respectively connected with a second fixing nut 408, the first transverse plate 401 is installed in the mounting groove 205 at the bottom of the mounting plate 202, the buffer assembly body 7 is arranged between the second transverse plate 402 and the third transverse plate 403, and the collision plate 208 is fixedly connected to the bottom of the fourth transverse plate 404.

[0036] In this embodiment, the axial tensile bracket 4 is an inter-shaped bracket, which is composed of four transverse plates, eight M48×800 screws and eight M42 fixing nuts; before the test, the upper and lower bottom plates of the buffer assembly body 7 are fixed to the second transverse plate 402 and the third transverse plate 403 respectively, and then the first transverse plate 401 and the third transverse plate 403, the second transverse plate 402 and the fourth transverse plate 404 are connected by screws, and then the collision anvil 209 is fixed to the fourth transverse plate 404, or the collision anvil 209 and the fourth transverse plate 404 can be installed first, and the ready axial tensile test bracket is as follows Figure 5-Figure 8 As shown, during the test, the first horizontal plate 401 is fixed to the corresponding position of the bottom surface of the mounting plate 202 .

[0037] The maximum impact force is 5MN. The tensile bracket is connected with eight screws. The strength of the connecting screws is grade 8.8, [σ]s=640MPa, the safety factor is 1.5, the minimum diameter is 43.2mm, and the M48 bolts are used to fully meet the strength requirements.

[0038] Each plate of the mounting bracket is provided with lifting threaded holes on its side, which reduces the labor intensity of operators, facilitates hole alignment during assembly, and saves test preparation time. Example

[0039] Reference Figure 9-12A heavy-duty buffer component dynamic characteristics testing mechanism includes a base plate 1, and also includes a positioning frame 101 fixedly connected to the base plate 1, a drop hammer is slidably connected in the positioning frame 101, the drop hammer includes a first mass block 2, a second mass block 201 and a mounting plate 202, the first mass block 2, the second mass block 201 and the mounting plate 202 are fixedly connected; a mounting bracket connected to the bottom of the mounting plate 202, a buffer component body 7 is connected in the mounting bracket; a collision plate 208 is fixedly connected to the bottom of the mounting bracket, a collision anvil 209 is fixedly connected to the bottom of the collision plate 208; a fixed plate 108 is fixedly connected to the base plate 1, a collision pad 109 is fixedly connected to the fixed plate 108; a fixed frame 102 is fixedly connected to the top of the positioning frame 101, and a dehooker 106 cooperating with the first mass block 2 is slidably connected to the fixed frame 102.

[0040] The mounting bracket adopts a horizontal bracket 5.

[0041] The transverse bracket 5 includes an intermediate limiting plate 501 and two L plates 505, both sides of the intermediate limiting plate 501 are fixedly connected with the first vertical plate 502, the two L plates 505 are respectively arranged on both sides of the intermediate limiting plate 501, and the two L plates 505 are fixedly connected with the second vertical plate 504, the buffer component body 7 is arranged between the first vertical plate 502 and the second vertical plate 504 located on the same side of the intermediate limiting plate 501, and a third screw 506 is connected between the first vertical plate 502 and the second vertical plate 504 located on the same side of the intermediate limiting plate 501, and a third fixing nut 507 is threadedly connected to the third screw 506, the two first vertical plates 502 and the two buffer component bodies 7 are fixedly connected to the intermediate limiting plate 501 by locking bolts 503, the L plate 505 is fixedly connected to the bottom of the mounting plate 202, and the collision plate 208 is fixedly connected to the bottom of the intermediate limiting plate 501 and the first vertical plate 502.

[0042] In this embodiment, the transverse bracket 5 is a T-shaped bracket. Before the test, the collision anvil head 209 is first fixed to the bottom of the middle limit plate 501 and the first vertical plate 502, and then four M42×380 third screws 506 are placed on the first vertical plate 502 and the second vertical plate 504. The two sets of buffer component bodies 7 are respectively placed between the two groups of first vertical plates 502 and enemy vertical plates 504, and are firmly connected. During the test, the L plate 505 is fixed to the corresponding position on the bottom surface of the mounting plate 202.

[0043] The maximum impact force is 5MN. Four third screws 506 are used at the impact position to fix the two buffer assembly bodies 7 on the impact mounting plate 202, and there are eight shear surfaces. The third screw 506 has a strength of grade 8.8, [σ]s=640MPa, and the shear strength is calculated as 1 / 3[σ]s. The safety factor is 1.5, the minimum diameter is 33.5mm, and the M42 bolts are used to fully meet the strength requirements.

[0044] Each plate of the mounting bracket is provided with lifting threaded holes on its side, which reduces the labor intensity of operators, facilitates hole alignment during assembly, and saves test preparation time. Example

[0045] Reference Fig.13 and Fig.14 A heavy-duty buffer component dynamic characteristics testing mechanism includes a base plate 1, and also includes a positioning frame 101 fixedly connected to the base plate 1, a drop hammer is slidably connected in the positioning frame 101, the drop hammer includes a first mass block 2, a second mass block 201 and a mounting plate 202, the first mass block 2, the second mass block 201 and the mounting plate 202 are fixedly connected; a mounting bracket connected to the bottom of the mounting plate 202, a buffer component body 7 is connected in the mounting bracket; a collision plate 208 is fixedly connected to the bottom of the mounting bracket, a collision anvil 209 is fixedly connected to the bottom of the collision plate 208; a fixed plate 108 is fixedly connected to the base plate 1, a collision pad 109 is fixedly connected to the fixed plate 108; a fixed frame 102 is fixedly connected to the top of the positioning frame 101, and a dehooker 106 cooperating with the first mass block 2 is slidably connected to the fixed frame 102.

[0046] The mounting bracket adopts an axial compression bracket.

[0047] The axial compression bracket includes a connecting plate 6 on which a boss 601 is arranged. The boss 601 is connected to the mounting groove 205 at the bottom of the mounting plate 202 . The buffer component body 7 is arranged at the bottom of the connecting plate 6 , and the collision plate 208 is arranged at the bottom of the buffer component body 7 .

[0048] In this embodiment, the connecting plate 6 can be directly connected to the buffer component body 7. During the test, the boss 601 on the top of the connecting plate 6 can be installed at the corresponding position on the bottom of the mounting plate 202. The side of the connecting plate 6 is provided with a lifting threaded hole to reduce the labor intensity of the operator, facilitate the hole alignment during assembly, and save the test preparation time. Example

[0049] Reference Figure 1-Figure 4 A heavy-duty buffer component dynamic characteristics testing mechanism is basically the same as the above-mentioned embodiment 1. Furthermore, a winch 103 and a pulley assembly 104 are provided on the top of the fixed frame 102. A wire rope is connected to the winch 103. The wire rope passes through the pulley assembly 104 and is connected to a decoupler 106. A guide shaft 105 is also provided on the fixed frame 102, and the decoupler 106 is slidably connected to the guide shaft 105.

[0050] The positioning frame 101 is further provided with a rib plate 110 , and the rib plate 110 is provided with a placement groove, and the placement groove is used to place a loading and unloading safety beam 111 , and the loading and unloading safety beam 111 is connected to the second mass block 201 .

[0051] The legs of the positioning frame 101 are made of heavy-duty steel as the main material, with installation end faces and angle ribs welded at both ends for reinforcement, and ribs 110 welded in the middle for placing loading and unloading safety beams 111 as safety supports when loading and unloading test mounting brackets.

[0052] The winch 103 and the pulley assembly 104 are directly driven by electricity without secondary conversion; the braking link after lifting into place is removed to avoid problems such as insufficient braking force and brake failure; the unhooker 106 is used to release the drop hammer structure, and the unhooker 106 in the prior art can be used; the unhooker 106 is a load release hook, which is suitable for free fall applications; 1. The double-sided opening and closing structure is adopted to achieve release without external force and lateral deviation; 2. The internal structure contains a safety structure, which will not release out of control even if the power is turned off, which is stable and reliable; 3. Long-distance anti-interference remote control unhooking, up to 100 meters, no other auxiliary facilities are required to trigger, and there are sound, indicator light reminders and delayed actions during operation to ensure the personal safety of the operator; 4. There is a rechargeable power supply inside, which can be used continuously for more than 8 hours after charging, and is easy to carry; 5 No cable and cord entanglement issues.

[0053] During the test, the unhooker 106 is hung on the hook 206, the prepared drop hammer structure is grabbed, and it is lifted by the winch 103 and the pulley assembly 104, and the actual height of the drop hammer structure is measured. After reaching the specified height, the lifting is stopped, and the unhooker 106 is started after ensuring safety. The drop hammer structure falls freely, and the collision anvil 209 hits the collision pad 109 to complete a test action; the measurement and control instrument adopts the existing technology, specifically the DRM-DEM series impact machine control measuring instrument; the DRM-DEM series drop hammer material impact measurement and control instrument mainly completes the motion control of the overall test bench and the collection and processing of test signals; the motion control of the test bench is mainly the lifting and release motion control of the drop hammer structure, as well as the height control of the drop hammer structure.

[0054] In the present invention, a loading and unloading tool can also be provided, which can be specifically a lifting trolley. When installing the test piece, it is only necessary to push the trolley under the drop weight structure for support, and then the loading and unloading operation of the test piece can be carried out.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heavy-duty buffer component dynamic characteristics testing mechanism, comprising a base plate (1), characterized in that: Also includes: a positioning frame (101) fixedly connected to the bottom plate (1), a drop weight slidably connected inside the positioning frame (101), the drop weight comprising a first mass block (2), a second mass block (201) and a mounting plate (202), the first mass block (2), the second mass block (201) and the mounting plate (202) being fixedly connected; A mounting bracket connected to the bottom of the mounting plate (202), wherein a buffer assembly body (7) is connected to the mounting bracket; A collision plate (208) is fixedly connected to the bottom of the mounting bracket, and a collision anvil (209) is fixedly connected to the bottom of the collision plate (208); A fixed plate (108) fixedly connected to the bottom plate (1), wherein a collision pad (109) is fixedly connected to the fixed plate (108); A fixed frame (102) is fixedly connected to the top of the positioning frame (101), and a dehooking device (106) cooperating with a drop hammer is slidably connected to the fixed frame (102); The first mass block (2), the second mass block (201) and the mounting plate (202) are all connected with stud bolts (207); a hook (206) is fixedly connected to the top of the drop weight; the decoupler (106) can grab and release the drop weight via the hook (206); a guide rod (107) is connected between the bottom plate (1) and the fixing frame (102); a guide plate (203) is provided on the outer wall of the mounting plate (202); the guide plate (203) is slidably connected to the guide rod (107); an upper rib (204) is provided on the top of the mounting plate (202); and a mounting groove (205) is provided on the bottom surface of the mounting plate (202).

2. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 1, characterized in that: A cylinder (3) is fixedly connected to the outer wall of the bottom plate (1), a piston (301) is slidably connected inside the cylinder (3), a fixed rod (302) is fixedly connected to the top of the piston (301), a push plate (303) is provided on the top of the fixed rod (302), and the push plate (303) is slidably connected to the guide rod (107), an air outlet pipe (305) is provided on the outer wall of the cylinder (3), and a nozzle (307) is provided at one end of the air outlet pipe (305) away from the cylinder (3), and the nozzle (307) faces the collision pad (109).

3. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 2, characterized in that: A spring (304) is provided between the inner wall of the cylinder (3) and the piston (301); the spring (304) is sleeved on the outer wall of the fixing rod (302); a support plate (308) is fixedly connected to the outer wall of the cylinder (3); the air outlet pipe (305) is connected to the support plate (308); an air inlet pipe (306) is also provided at the bottom of the cylinder (3); and both the air outlet pipe (305) and the air inlet pipe (306) are provided with a one-way valve.

4. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 3, characterized in that: The mounting bracket comprises three types: an axial tension bracket (4), a transverse bracket (5) and an axial compression bracket.

5. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 4, characterized in that: The axial stretching bracket (4) comprises a first transverse plate (401), a second transverse plate (402), a third transverse plate (403) and a fourth transverse plate (404); a first screw rod (405) is connected between the first transverse plate (401) and the third transverse plate (403); both ends of the first screw rod (405) are threadedly connected to first fixing nuts (406); a second screw rod (407) is connected between the second transverse plate (402) and the fourth transverse plate (404); both ends of the second screw rod (407) are respectively connected to second fixing nuts (408); the first transverse plate (401) is mounted in a mounting groove (205) at the bottom of the mounting plate (202); the buffer assembly body (7) is arranged between the second transverse plate (402) and the third transverse plate (403); and the collision plate (208) is fixedly connected to the bottom of the fourth transverse plate (404).

6. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 4, characterized in that: The transverse bracket (5) comprises an intermediate limiting plate (501) and two L-plates (505), both sides of the intermediate limiting plate (501) are fixedly connected to a first vertical plate (502), the two L-plates (505) are respectively arranged on both sides of the intermediate limiting plate (501), and both L-plates (505) are fixedly connected to a second vertical plate (504), and the buffer assembly body (7) is arranged between the first vertical plate (502) and the second vertical plate (504) located on the same side of the intermediate limiting plate (501), and is located on the intermediate limiting plate (501). A third screw rod (506) is connected between the first vertical plate (502) and the second vertical plate (504) on the same side, and a third fixing nut (507) is threadedly connected to the third screw rod (506). The two first vertical plates (502) and the two buffer assembly bodies (7) are fixedly connected to the middle limit plate (501) through locking bolts (503). The L plate (505) is fixedly connected to the bottom of the mounting plate (202), and the collision plate (208) is fixedly connected to the bottom of the middle limit plate (501) and the first vertical plate (502).

7. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 4, characterized in that: The axial compression bracket comprises a connecting plate (6), the connecting plate (6) being provided with a boss (601), the boss (601) being connected to a mounting groove (205) at the bottom of the mounting plate (202), the buffer component body (7) being arranged at the bottom of the connecting plate (6), and the collision plate (208) being arranged at the bottom of the buffer component body (7).

8. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 5, 6 or 7, characterized in that: A hoist (103) and a pulley assembly (104) are provided on the top of the fixed frame (102); a steel wire rope is connected to the hoist (103); the steel wire rope passes through the pulley assembly (104) and is connected to a decoupler (106); a guide shaft (105) is also provided on the fixed frame (102); and the decoupler (106) is slidably connected to the guide shaft (105).

9. A heavy-duty buffer component dynamic characteristics testing mechanism according to claim 8, characterized in that: The positioning frame (101) is further provided with a rib plate (110), and the rib plate (110) is provided with a placement groove, and the placement groove is used to place the loading and unloading safety beam (111).

Images