Spring flat steel fatigue life testing device

Abstract

The invention relates to the technical field of spring flat steel fatigue testing, and discloses a spring flat steel fatigue life testing device which comprises a machine body, the inner wall of the machine body is slidably connected with an extrusion rod, the top of the machine body is slidably connected with a sliding table, and the sliding table penetrates through the machine body. A sliding table is fixedly installed on the machine body, a screw rod is fixedly installed at the bottom of the sliding table, a nut is in threaded connection with the outer wall of the screw rod, a pressing plate is placed on the top of the nut, a motor is fixedly installed on the top of the machine body, and a rotating shaft is fixedly installed at the output end of the motor. Through the arrangement of the protection mechanism, the spring flat steel can be covered in the fatigue life test process of the spring flat steel, and once the spring flat steel is broken, the protection cover can block fragments of the spring flat steel, so that the spring flat steel can be prevented from being broken and flying out in the repeated bending process, and safety accidents can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of spring flat steel fatigue testing, in particular to a spring flat steel fatigue life testing device. Background Art

[0002] Spring flat steel is mainly used in light trucks, medium and heavy-duty vehicles and passenger vehicles to reduce shock. After production, spring flat steel needs to be tested for fatigue life using testing equipment to prevent defective products from being put into use.

[0003] At present, the fatigue life test of spring flat steel is mostly carried out through repeated bending. However, there is a lack of protective devices during the detection process. Once the quality of the spring flat steel does not meet the standards, it may break during the repeated bending process. Once the spring flat steel breaks, it may even pop out to the surroundings, which may easily cause harm to the staff around the equipment and pose a safety hazard. Summary of the invention

[0004] The object of the present invention is to provide a spring flat steel fatigue life testing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spring flat steel fatigue life testing device, comprising a body, the inner wall of the body is slidably connected to an extrusion rod, the top of the body is slidably connected to a slide, and the slide runs through the body, a screw is fixedly installed at the bottom of the slide, a nut is threadedly connected to the outer wall of the screw, a pressure plate is placed on the top of the nut, a motor is fixedly installed on the top of the body, a rotating shaft is fixedly installed on the output end of the motor, a rotating disk is fixedly installed on the outer wall of the rotating shaft, a connecting rod is hinged on the side wall of the rotating disk, and a cross bar is fixedly installed on the end of the connecting rod away from the rotating disk The cross bar is rotatably connected to the side wall of the slide. A protective mechanism is provided on the machine body. The protective mechanism can prevent the spring flat steel from breaking and flying out, thereby avoiding the occurrence of safety accidents. A heat dissipation mechanism is provided on the machine body. The heat dissipation mechanism can prevent the spring flat steel from gradually heating up during repeated bending, fully restoring the state of the spring flat steel during the driving of the truck. An extrusion mechanism is provided on the machine body. The extrusion mechanism can be used to extrude different positions of the spring flat steel to make the spring flat steel bend to different degrees, simulating the use scenario of the spring flat steel on the truck. The protective mechanism includes:

[0006] A transmission rod, the transmission rod is rotatably connected to the inner wall of the body, and the transmission rod passes through the body, the outer wall of the transmission rod is slidably connected to a push plate, the outer wall of the transmission rod is fixedly installed with a transmission gear, the outer wall of the rotating plate is fixedly installed with a driving toothed plate, and the driving toothed plate is meshed with the transmission gear;

[0007] A sliding frame, wherein the sliding frame is slidably connected to the outer wall of the machine body, a vertical rod is fixedly installed on the top of the sliding frame, a collar is fixedly installed on the top of the vertical rod, the collar is rotatably connected to the inner wall of the push plate, a protective cover is slidably connected to the inner wall of the machine body, a through groove is provided on the protective cover, a sliding shaft is fixedly installed on the side wall of the sliding frame, the outer wall of the sliding shaft is fitted to the inner wall of the through groove, the protective cover can be pushed by setting the sliding shaft to cooperate with the through groove, and the protective cover can be used to block the broken fragments of the spring flat steel;

[0008] The slide rail is fixedly mounted on the outer wall of the transmission rod, the inner wall of the slide rail is slidably connected with a slider, the side wall of the slider is fixedly mounted with a return spring, the end of the return spring away from the slider is fixedly mounted on the inner wall of the slide rail, the outer wall of the slider is hinged with a connecting rod, the end of the connecting rod away from the slider is hinged to the outer wall of the push plate, and the return spring can be set to drive the slider to slide and reset on the inner wall of the slide rail.

[0009] Preferably, the heat dissipation mechanism includes a rotating rod, one end of which is rotatably connected to the top of the machine body, and the other end of the rotating rod is fixedly mounted with a fan blade. A small bevel gear is fixedly mounted on the outer wall of the rotating rod, and a large bevel gear is fixedly mounted on the outer wall of the transmission rod. The large bevel gear is meshed with the small bevel gear. By arranging the fan blades, air can be blown toward the spring flat steel to reduce the temperature of the spring flat steel.

[0010] Preferably, a side wall of the machine body is rotatably connected to a support rod, a spoiler is fixedly mounted on an outer wall of the support rod, and an eccentric wheel is fixedly mounted on an outer wall of the transmission rod.

[0011] Preferably, an L-plate is fixedly installed on the outer wall of the support rod, and two groups of L-plates are provided. The two groups of L-plates are mirror-imaged on the outer wall of the support rod with the support rod as the central axis, and the two groups of L-plates are both attached to the outer wall of the eccentric wheel. By setting the eccentric wheel and cooperating with the two groups of L-plates, the support rod can be driven to reciprocate on the side wall of the machine body.

[0012] Preferably, the extrusion mechanism comprises a slide plate, which is slidably connected to the top of the machine body and passes through the machine body. An inclined groove is provided on the slide plate, and an inclined rod is fixedly installed on the side wall of the slide plate.

[0013] Preferably, an L-rod is fixedly installed on the top of the extrusion rod, and the outer wall of the L-rod is fitted on the inner wall of the inclined rod. By arranging the inclined rod in conjunction with the L-rod, the extrusion rod can be driven to slide back and forth on the inner wall of the machine body.

[0014] Preferably, a hollow block is slidably connected to the inner wall of the top of the body, a push rod is fixedly installed on the outer wall of the hollow block, and the outer wall of the push rod fits against the inner wall of the inclined groove. The slide plate can be pushed and pulled reciprocally by arranging the hollow block to cooperate with the push rod and the inclined groove.

[0015] Preferably, a cam is fixedly installed on the side wall of the support rod, and a push shaft is fixedly installed on the outer wall of the cam. The outer wall of the push shaft fits against the inner wall of the hollow block. By setting the cam and the push shaft, the hollow block can be pushed and pulled reciprocatingly, so that the hollow block slides reciprocatingly on the top inner wall of the machine body.

[0016] Preferably, the spoiler is located below the fan blades, and the spoiler can be used to guide the fan blades to blow toward both sides of the wind direction slide of the spring flat steel, thereby expanding the airflow coverage.

[0017] Preferably, two groups of the screw rods are provided, and the two groups of the screw rods are mirror-imaged at the bottom of the slide table with the rotating rod as the central axis.

[0018] Compared with the prior art, the present invention provides a spring flat steel fatigue life testing device, which has the following beneficial effects:

[0019] 1. The spring flat steel fatigue life test device can cover the spring flat steel during the fatigue life test of the spring flat steel through the setting of the protective mechanism. Once the spring flat steel is broken, the protective cover will block the fragments of the spring flat steel, thereby preventing the spring flat steel from breaking and flying out during repeated bending, thereby avoiding the occurrence of safety accidents.

[0020] 2. The spring flat steel fatigue life test device can reduce the temperature of the spring flat steel by setting the heat dissipation mechanism, so as to avoid the rigidity of the spring flat steel being affected due to the gradual heating of the spring flat steel due to repeated bending. It can restore the state of the spring flat steel during the driving of the truck to a great extent, making the fatigue life test of the spring flat steel more accurate.

[0021] 3. The spring flat steel fatigue life testing device can squeeze the spring flat steel to different positions through the setting of the extrusion mechanism, so that the spring flat steel can be bent to different degrees, simulating the use scenario of the spring flat steel on the truck, and then obtaining accurate test data of the spring flat steel, further improving the accuracy of the spring flat steel fatigue life test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0023] Figure 1 It is a schematic diagram of the overall structure of the front side of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the back side of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall side view structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the protective cover of the present invention when it is in a raised state;

[0027] Figure 5 It is a schematic diagram of the overall structure of the transmission rod of the present invention;

[0028] Figure 6 It is a schematic diagram of the overall structure of the protective cover and the sliding frame of the present invention;

[0029] Figure 7 It is a partial structural schematic diagram of the extrusion mechanism and the heat dissipation mechanism of the present invention;

[0030] Figure 8 For the present invention Figure 3 A is an enlarged structural diagram of FIG.

[0031] In the figure: 1, machine body; 2, extrusion rod; 3, slide; 4, screw; 5, nut; 6, pressure plate; 7, motor; 8, rotating shaft; 9, rotating disk; 10, connecting rod; 11, cross bar; 12, protection mechanism; 121, transmission rod; 122, sliding frame; 123, slide rail; 124, push plate; 125, transmission gear; 126, driving gear plate; 127, vertical rod; 128, collar; 129, protection cover; 1210, through slot; 1211, sliding shaft; 1212 , slider; 1213, return spring; 1214, connecting rod; 13, heat dissipation mechanism; 131, rotating rod; 132, fan blade; 133, small bevel gear; 134, large bevel gear; 135, support rod; 136, spoiler; 137, eccentric wheel; 138, L plate; 14, extrusion mechanism; 141, slide plate; 142, inclined groove; 143, inclined rod; 144, L rod; 145, hollow block; 146, push rod; 147, cam; 148, push shaft. DETAILED DESCRIPTION

[0032] like Figure 1-Figure 8As shown, the present invention provides a technical solution: a spring flat steel fatigue life test device, comprising a machine body 1, the inner wall of the machine body 1 is slidably connected to an extrusion rod 2, the top of the machine body 1 is slidably connected to a slide 3, and the slide 3 runs through the machine body 1. During the up and down reciprocating sliding of the slide 3, the spring flat steel can be driven to reciprocate up and down synchronously in cooperation with the clamping of the pressing plate 6. When the spring flat steel moves downward and contacts the extrusion rod 2, it will be subjected to the reverse force of the extrusion rod 2. At the same time, the slide 3 will continue to drive the spring flat steel to move downward, thereby causing the spring flat steel clamped by the pressing plate 6 to bend. Through the up and down reciprocating movement of the spring flat steel, and at the same time cooperating with the extrusion rod 2, the spring flat steel can be repeatedly Bending, and then the fatigue life of the spring flat steel can be tested. A screw rod 4 is fixedly installed at the bottom of the slide 3. Two groups of screw rods 4 are arranged. The two groups of screw rods 4 are mirror-imaged at the bottom of the slide 3 with the rotating rod 131 as the central axis. The outer wall of the screw rod 4 is threadedly connected with a nut 5. A pressure plate 6 is placed on the top of the nut 5. The spring flat steel is placed in the gap between the pressure plate 6 and the slide 3 and placed between the two groups of screw rods 4. Then the nut 5 is rotated to move it upward on the outer wall of the screw rod 4. At the same time, the nut 5 will drive the pressure plate 6 to move upward synchronously until the pressure plate 6 presses the spring flat steel against the bottom of the slide 3. A motor 7 is fixedly installed on the top of the body 1. The output of the motor 7 A rotating shaft 8 is fixedly installed at the output end, a rotating disk 9 is fixedly installed on the outer wall of the rotating shaft 8, a connecting rod 10 is hinged on the side wall of the rotating disk 9, a cross bar 11 is fixedly installed on the end of the connecting rod 10 away from the rotating disk 9, and the cross bar 11 is rotatably connected to the side wall of the slide 3. The motor 7 is started to drive the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, the rotating disk 9 will be driven to rotate synchronously. When the rotating disk 9 rotates, one end of the connecting rod 10 will be driven to make a circular motion around the rotating shaft 8. At the same time, the other end of the connecting rod 10 will push and pull the cross bar 11 reciprocatingly, so that the cross bar 11 reciprocates to push and pull the slide 3, so that the slide 3 slides reciprocatingly up and down on the top of the machine body 1. A protective mechanism 12 is provided on the machine body 1. By setting the protective mechanism 12, In order to prevent the spring flat steel from breaking and flying out, thereby avoiding the occurrence of safety accidents, a heat dissipation mechanism 13 is arranged on the body 1, and the heat dissipation mechanism 13 can prevent the spring flat steel from gradually heating up during repeated bending, fully restore the state of the spring flat steel during the driving of the truck, and make the fatigue life test of the spring flat steel more accurate. An extrusion mechanism 14 is arranged on the body 1, and the extrusion mechanism 14 can be used to squeeze different positions of the spring flat steel to make the spring flat steel bend to different degrees, simulating the use scenario of the spring flat steel on the truck, and then accurate test data of the spring flat steel can be obtained, further improving the accuracy of the fatigue life test of the spring flat steel.

[0033] The protective mechanism 12 comprises a transmission rod 121, a slide frame 122, a slide rail 123, a push plate 124, a transmission gear 125, a driving toothed disc 126, a vertical rod 127, a collar 128, a protective cover 129, a through slot 1210, a slide shaft 1211, a slider 1212, a reset spring 1213, and a connecting rod 1214; the transmission rod 121 is rotatably connected to the inner wall of the body 1, and the transmission rod 121 passes through the body 1, the outer wall of the transmission rod 121 is slidably connected with the push plate 124, the outer wall of the transmission rod 121 is fixedly installed with a transmission gear 125, the outer wall of the rotating disk 9 is fixedly installed with a driving toothed disc 126, the driving toothed disc 126 is meshed with the transmission gear 125, and the driving toothed disc 126 cooperates with the transmission gear 125 during the rotation of the rotating disk 9. 25 can drive the transmission rod 121 to rotate at high speed on the side wall of the machine body 1, the slide frame 122 is slidably connected to the outer wall of the machine body 1, a vertical rod 127 is fixedly installed on the top of the slide frame 122, a collar 128 is fixedly installed on the top of the vertical rod 127, and the collar 128 is rotatably connected to the inner wall of the push plate 124. The push plate 124 slides on the outer wall of the transmission rod 121 and gradually approaches the slide rail 123. At the same time, the collar 128 and the vertical rod 127 can drive the slide frame 122 to slide on the outer wall of the machine body 1. The inner wall of the machine body 1 is slidably connected with a protective cover 129. The protective cover 129 can slide upward to cover the extrusion rod 2 inside the machine body 1 and the lower half of the slide table 3. At this time, the protective cover 129 can be used to protect the spring flat steel to prevent the spring from The flat steel breaks and flies out during repeated bending, thereby avoiding the occurrence of safety accidents. A through slot 1210 is provided on the protective cover 129, and a sliding shaft 1211 is fixedly installed on the side wall of the slide frame 122. The outer wall of the sliding shaft 1211 fits the inner wall of the through slot 1210. When the slide frame 122 slides, the sliding shaft 1211 of its side wall will fit the inner wall of the through slot 1210 to move and push the protective cover 129, so that the protective cover 129 slides upward on the inner wall of the body 1. The slide rail 123 is fixedly installed on the outer wall of the transmission rod 121, and the inner wall of the slide rail 123 is slidably connected with a slider 1212. When the transmission rod 121 rotates at high speed, the slide rail 123 will be driven to rotate synchronously. When the slide rail 123 rotates, the slider 1212 inside it 12 will be thrown out, so that the slider 1212 slides on the inner wall of the slide rail 123 and gradually moves away from the transmission rod 121, and a return spring 1213 is fixedly installed on the side wall of the slider 1212, and one end of the return spring 1213 away from the slider 1212 is fixedly installed on the inner wall of the slide rail 123, and the outer wall of the slider 1212 is hinged with a connecting rod 1214, and one end of the connecting rod 1214 away from the slider 1212 is hinged to the outer wall of the push plate 124. During the process of the slider 1212 inside the slide rail 123 being thrown out, the slider 1212 will compress the return spring 1213 and pull the connecting rod 1214, so that the connecting rod 1214 pulls the push plate 124, and then the push plate 124 slides on the outer wall of the transmission rod 121 and gradually approaches the slide rail 123.

[0034] The heat dissipation mechanism 13 comprises a rotating rod 131, a fan blade 132, a small bevel gear 133, a large bevel gear 134, a support rod 135, a spoiler 136, an eccentric wheel 137, and an L plate 138; one end of the rotating rod 131 is rotatably connected to the top of the body 1, and the other end of the rotating rod 131 is fixedly installed with a fan blade 132. When the rotating rod 131 rotates, the fan blade 132 will be driven to rotate synchronously. The rotation of the fan blade 132 can blow air to the spring flat steel clamped by the pressure plate 6, thereby reducing the temperature of the spring flat steel and preventing the spring flat steel from being repeatedly bent and gradually rising. The temperature affects the rigidity of the spring flat steel, which greatly simulates the use scenario of the spring flat steel on the car. A small bevel gear 133 is fixedly installed on the outer wall of the rotating rod 131, and a large bevel gear 134 is fixedly installed on the outer wall of the transmission rod 121. The large bevel gear 134 meshes with the small bevel gear 133. When the transmission rod 121 rotates, the large bevel gear 134 and the small bevel gear 133 can drive the rotating rod 131 to rotate at high speed on the top of the body 1. The side wall of the body 1 is rotatably connected to the support rod 135, and the outer wall of the support rod 135 is fixedly installed with a spoiler 1 36, the spoiler 136 is located below the fan blade 132, and the support rod 135 reciprocates while driving the spoiler 136 to swing back and forth. The reciprocating swing of the spoiler 136 can guide the fan blade 132 to blow to the two sides of the wind direction slide 3 of the spring flat steel, thereby expanding the airflow coverage range, so that the spring flat steel can be fully and effectively cooled during the fatigue life test, and the state of the spring flat steel during the driving process of the truck is fully restored. The outer wall of the transmission rod 121 is fixedly installed with an eccentric wheel 137, and the outer wall of the support rod 135 An L-plate 138 is fixedly installed, and two groups of L-plates 138 are arranged. The two groups of L-plates 138 are mirror-arranged on the outer wall of the support rod 135 with the support rod 135 as the central axis. The two groups of L-plates 138 are both fitted on the outer wall of the eccentric wheel 137. When the transmission rod 121 rotates, it will drive the eccentric wheel 137 to rotate synchronously. When the eccentric wheel 137 rotates, it will fit on the surface of the two groups of L-plates 138 and move back and forth. At the same time, the eccentric wheel 137 will reciprocately squeeze the two groups of L-plates 138, so that the two groups of L-plates 138 drive the support rod 135 to reciprocate on the side wall of the body 1.

[0035] The extrusion mechanism 14 comprises a slide plate 141, an inclined slot 142, an inclined rod 143, an L rod 144, a hollow block 145, a push rod 146, a cam 147 and a push shaft 148; the slide plate 141 is slidably connected to the top of the machine body 1, and the slide plate 141 passes through the machine body 1, and an inclined slot 142 is provided on the slide plate 141, and an inclined rod 143 is fixedly installed on the side wall of the slide plate 141, and an L rod 144 is fixedly installed on the top of the extrusion rod 2, and the outer wall of the L rod 144 is attached to the inner wall of the inclined rod 143. When the slide plate 141 slides back and forth up and down, the inclined rod 143 on its side wall will reciprocate to squeeze the L rod 144, so that the L rod 144 reciprocates to push and pull the extrusion rod 2, so that the two groups of extrusion rods 2 reciprocate synchronously in opposite directions on the inner wall of the machine body 1, and the reciprocating movement of the extrusion rod 2 can make it squeeze to different positions of the spring flat steel, so that the spring flat steel can be bent to different degrees, simulating the use scenario of the spring flat steel on a truck, and the machine body 1 The top inner wall of the body 1 is slidably connected with a hollow block 145, and a push rod 146 is fixedly installed on the outer wall of the hollow block 145. The outer wall of the push rod 146 fits the inner wall of the inclined groove 142. During the reciprocating sliding of the hollow block 145, the push rod 146 is driven to fit the inner wall of the inclined groove 142 and move back and forth. At the same time, the push rod 146 pushes and pulls the slide plate 141 back and forth, so that the slide plate 141 slides back and forth up and down on the top of the body 1. The side wall of the support rod 135 is fixedly installed with a cam 1 47. A push shaft 148 is fixedly installed on the outer wall of the cam 147, and the outer wall of the push shaft 148 fits against the inner wall of the hollow block 145. The support rod 135 drives the cam 147 to swing back and forth while the side wall of the body 1 reciprocates. The cam 147 swings back and forth while the push shaft 148 moves back and forth against the inner wall of the hollow block 145. At the same time, the push shaft 148 pushes and pulls the hollow block 145 back and forth, so that the hollow block 145 slides back and forth on the top of the body 1.

[0036] Working principle: first, place the spring flat steel in the gap between the pressure plate 6 and the slide 3, and place it between the two sets of screws 4, then turn the nut 5 to make it move upward on the outer wall of the screw 4, and at the same time, the nut 5 will drive the pressure plate 6 to move upward synchronously until the pressure plate 6 presses the spring flat steel against the bottom of the slide 3, and then start the motor 7 to drive the shaft 8 to rotate. When the shaft 8 rotates, it will drive the turntable 9 to rotate synchronously. When the turntable 9 rotates, it will drive one end of the connecting rod 10 to make a circular motion around the shaft 8, and at the same time, the other end of the connecting rod 10 will push and pull the cross bar 11 back and forth, so that the cross bar 11 pushes and pulls the slide 3 back and forth, so that the slide 3 The top of the machine body 1 slides back and forth up and down. During the reciprocating up and down sliding process of the slide 3, the clamping of the pressure plate 6 can drive the spring flat steel to move back and forth synchronously. When the spring flat steel moves downward and contacts the extrusion rod 2, it will be subjected to the reverse force of the extrusion rod 2. At the same time, the slide 3 will continue to drive the spring flat steel to move downward, thereby causing the spring flat steel clamped by the pressure plate 6 to bend. Through the reciprocating up and down movement of the spring flat steel and the extrusion rod 2, the spring flat steel can be repeatedly bent, thereby testing the fatigue life of the spring flat steel. At the same time, during the rotation of the turntable 9, the driving toothed disc 126 and the transmission gear 1 25 can drive the transmission rod 121 to rotate at a high speed on the side wall of the machine body 1. During the high-speed rotation of the transmission rod 121, the slide rail 123 will be driven to rotate synchronously. When the slide rail 123 rotates, the slider 1212 inside it will be thrown out, so that the slider 1212 slides on the inner wall of the slide rail 123 and gradually moves away from the transmission rod 121. At the same time, the slider 1212 will compress the return spring 1213 and pull the connecting rod 1214, so that the connecting rod 1214 pulls the push plate 124, thereby making the push plate 124 slide on the outer wall of the transmission rod 121 and gradually approach the slide rail 123. At the same time, the push plate 124 cooperates with the sliding process. The collar 128 and the vertical rod 127 can drive the slide frame 122 to slide on the outer wall of the body 1, and the collar 128 will gradually approach the body 1. At this time, the sliding shaft 1211 on the side wall of the slide frame 122 will fit the inner wall of the through groove 1210 and move and push the protective cover 129, so that the protective cover 129 slides upward on the inner wall of the body 1. The upward sliding of the protective cover 129 can cover the extrusion rod 2 inside the body 1 and the lower half of the slide 3. At this time, the protective cover 129 can be used to protect the spring flat steel to prevent the spring flat steel from breaking and flying out during repeated bending, thereby avoiding the occurrence of safety accidents.

[0037] When the transmission rod 121 rotates, the large bevel gear 134 and the small bevel gear 133 can drive the rotating rod 131 to rotate at a high speed on the top of the body 1. When the rotating rod 131 rotates, the fan blades 132 can be driven to rotate synchronously. The rotation of the fan blades 132 can blow air to the spring flat steel clamped by the pressure plate 6, thereby reducing the temperature of the spring flat steel, avoiding repeated bending and gradual heating of the spring flat steel, which affects the rigidity of the spring flat steel. This greatly simulates the use scenario of the spring flat steel on the vehicle, which is conducive to improving the accuracy of the fatigue life test of the spring flat steel. At the same time, when the transmission rod 121 rotates, it will drive the eccentric wheel 137 to rotate synchronously. The rotation of the eccentric wheel 137 At the same time, it will fit on the surface of the two groups of L plates 138 and move back and forth. At the same time, the eccentric wheel 137 will reciprocate and squeeze the two groups of L plates 138, so that the two groups of L plates 138 drive the support rod 135 to reciprocate on the side wall of the body 1. The reciprocating rotation of the support rod 135 will drive the spoiler 136 to swing back and forth. The reciprocating swing of the spoiler 136 can guide the fan blades 132 to the two sides of the wind direction slide 3 of the spring flat steel, thereby expanding the airflow coverage range, so that the spring flat steel can be fully and effectively cooled during the fatigue life test, fully restoring the state of the spring flat steel during the driving of the truck, and making the fatigue life test of the spring flat steel more accurate.

[0038] The support rod 135 will drive the cam 147 to swing back and forth while the side wall of the machine body 1 reciprocates. The cam 147 will drive the push shaft 148 to move back and forth in close contact with the inner wall of the hollow block 145 while the cam 147 will swing back and forth. At the same time, the push shaft 148 will push and pull the hollow block 145 back and forth, so that the hollow block 145 will slide back and forth on the top of the machine body 1. During the reciprocating sliding of the hollow block 145, the push rod 146 will be driven to move back and forth in close contact with the inner wall of the inclined groove 142. At the same time, the push rod 146 will push and pull the slide plate 141 back and forth, so that the slide plate 141 moves up and down on the top of the machine body 1. When sliding back and forth, the slide plate 141 slides back and forth up and down, and the inclined rod 143 on its side wall will reciprocately squeeze the L rod 144, so that the L rod 144 pushes and pulls the extrusion rod 2 reciprocatingly, so that the two groups of extrusion rods 2 slide back and forth synchronously in opposite directions on the inner wall of the body 1. The reciprocating movement of the extrusion rod 2 can squeeze the spring flat steel to different positions, so that the spring flat steel can be bent to different degrees, simulating the use scenario of the spring flat steel on a truck, and then accurate test data of the spring flat steel can be obtained, further improving the accuracy of the fatigue life test of the spring flat steel.

[0039] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A spring flat steel fatigue life testing device, comprising a body (1), characterized in that: The inner wall of the machine body (1) is slidably connected to an extrusion rod (2), the top of the machine body (1) is slidably connected to a slide table (3), and the slide table (3) passes through the machine body (1), a screw rod (4) is fixedly installed at the bottom of the slide table (3), a nut (5) is threadedly connected to the outer wall of the screw rod (4), a pressure plate (6) is placed on the top of the nut (5), a motor (7) is fixedly installed on the top of the machine body (1), and a rotating shaft (8) is fixedly installed on the output end of the motor (7), A rotating disk (9) is fixedly mounted on the outer wall of the rotating shaft (8); a connecting rod (10) is hingedly mounted on the side wall of the rotating disk (9); a cross bar (11) is fixedly mounted on one end of the connecting rod (10) away from the rotating disk (9); the cross bar (11) is rotatably connected to the side wall of the slide table (3); a protective mechanism (12) is arranged on the machine body (1); a heat dissipation mechanism (13) is arranged on the machine body (1); and a squeezing mechanism (14) is arranged on the machine body (1); the protective mechanism (12) comprises: A transmission rod (121), the transmission rod (121) is rotatably connected to the inner wall of the machine body (1), and the transmission rod (121) passes through the machine body (1), the outer wall of the transmission rod (121) is slidably connected to a push plate (124), the outer wall of the transmission rod (121) is fixedly mounted with a transmission gear (125), the outer wall of the rotating disk (9) is fixedly mounted with a driving toothed disc (126), and the driving toothed disc (126) is meshed with the transmission gear (125); A sliding frame (122), wherein the sliding frame (122) is slidably connected to the outer wall of the machine body (1), a vertical rod (127) is fixedly installed on the top of the sliding frame (122), a collar (128) is fixedly installed on the top of the vertical rod (127), and the collar (128) is rotatably connected to the inner wall of the push plate (124), a protective cover (129) is slidably connected to the inner wall of the machine body (1), and a through groove (1210) is formed on the protective cover (129), and a sliding shaft (1211) is fixedly installed on the side wall of the sliding frame (122), and the outer wall of the sliding shaft (1211) is fitted to the inner wall of the through groove (1210); A slide rail (123), wherein the slide rail (123) is fixedly mounted on the outer wall of the transmission rod (121), the inner wall of the slide rail (123) is slidably connected with a slider (1212), a return spring (1213) is fixedly mounted on the side wall of the slider (1212), one end of the return spring (1213) away from the slider (1212) is fixedly mounted on the inner wall of the slide rail (123), the outer wall of the slider (1212) is hinged with a connecting rod (1214), and one end of the connecting rod (1214) away from the slider (1212) is hinged to the outer wall of the push plate (124).

2. A spring flat steel fatigue life testing device according to claim 1, characterized in that: The heat dissipation mechanism (13) comprises a rotating rod (131), one end of the rotating rod (131) is rotatably connected to the top of the machine body (1), the other end of the rotating rod (131) is fixedly mounted with a fan blade (132), a small bevel gear (133) is fixedly mounted on the outer wall of the rotating rod (131), a large bevel gear (134) is fixedly mounted on the outer wall of the transmission rod (121), and the large bevel gear (134) is meshed with the small bevel gear (133).

3. A spring flat steel fatigue life testing device according to claim 1, characterized in that: The side wall of the machine body (1) is rotatably connected to a support rod (135), the outer wall of the support rod (135) is fixedly mounted with a spoiler (136), and the outer wall of the transmission rod (121) is fixedly mounted with an eccentric wheel (137).

4. A spring flat steel fatigue life testing device according to claim 3, characterized in that: An L-plate (138) is fixedly mounted on the outer wall of the support rod (135), and two groups of the L-plates (138) are provided. The two groups of the L-plates (138) are mirror-imaged on the outer wall of the support rod (135) with the support rod (135) as the central axis, and the two groups of the L-plates (138) are both attached to the outer wall of the eccentric wheel (137).

5. A spring flat steel fatigue life testing device according to claim 1, characterized in that: The extrusion mechanism (14) comprises a slide plate (141), the slide plate (141) is slidably connected to the top of the machine body (1), and the slide plate (141) passes through the machine body (1), an inclined groove (142) is provided on the slide plate (141), and an inclined rod (143) is fixedly installed on the side wall of the slide plate (141).

6. A spring flat steel fatigue life testing device according to claim 1, characterized in that: An L-rod (144) is fixedly mounted on the top of the extrusion rod (2), and the outer wall of the L-rod (144) is fitted on the inner wall of the oblique rod (143).

7. A spring flat steel fatigue life testing device according to claim 1, characterized in that: A hollow block (145) is slidably connected to the inner wall of the top of the machine body (1), a push rod (146) is fixedly mounted on the outer wall of the hollow block (145), and the outer wall of the push rod (146) is fitted to the inner wall of the inclined groove (142).

8. A spring flat steel fatigue life testing device according to claim 3, characterized in that: A cam (147) is fixedly mounted on the side wall of the support rod (135), a push shaft (148) is fixedly mounted on the outer wall of the cam (147), and the outer wall of the push shaft (148) is fitted on the inner wall of the hollow block (145).

9. A spring flat steel fatigue life testing device according to claim 3, characterized in that: The spoiler (136) is located below the fan blade (132).

10. A spring flat steel fatigue life testing device according to claim 1, characterized in that: The screw rods (4) are provided in two groups, and the two groups of the screw rods (4) are mirror-imaged and arranged at the bottom of the slide table (3) with the rotating rod (131) as the central axis.

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