Automobile frame strength detection device

Abstract

The invention discloses an automobile frame strength detection device, and belongs to the technical field of automobile frame detection. Comprising a platen, a wheel position fatigue strength detection unit, a frame middle strength detection unit and a stamping unit, a first gantry is connected to the middle of the platen in a bridging mode, the wheel position fatigue strength detection unit comprises a stress table, a jacking groove seat is pressed on the top of the stress table, and first guide rods are fixed to the four ends of the bottom of the jacking groove seat; the first guide rod is movably embedded into the inner side of the stress table, a first hydraulic cylinder is further fixed to the inner side of the stress table, and a piston rod of the first hydraulic cylinder is fixed to the middle of the top face of the jacking groove base; guide cylinders are fixed to the two sides of the stress table, second hydraulic cylinders are fixed to the inner sides of the guide cylinders, and convex columns are movably arranged at the positions, above the second hydraulic cylinders, of the guide cylinders; the device for detecting the strength of the automobile frame can well simulate the stress condition of the frame in practical application, so that the strength of the automobile frame is accurately detected.

Description

Technical Field

[0001] The invention specifically relates to an automobile frame strength detection device, and belongs to the technical field of automobile frame detection. Background Art

[0002] The frame is a frame structure that spans the front and rear axles of the car. The frame is commonly known as the beam and is the base of the car. It is generally composed of two longitudinal beams and several cross beams, and is supported on the wheels via the suspension device, the front axle, and the rear axle. The frame must have sufficient strength and rigidity to withstand the load of the car and the impact from the wheels. In order to ensure the safety of the vehicle, the frame needs to be tested for strength. Most of the existing frame strength tests are conducted by fatigue strength tests on the frame, mainly through long-term simulated use to observe the performance after use. The existing frame strength test, such as the Chinese patent authorization announcement number: CN212621425U, discloses a car frame strength testing device, including a mounting assembly and a testing mechanism. The testing mechanism includes a motor, a first pulley, a second pulley, a screw, a pressure plate, a testing head, a workbench, and a fixing block. The device can not only reduce the labor intensity of manual labor, but also increase the testing efficiency; but the testing method of the equipment is relatively single, and it cannot well simulate the stress condition of the actual application of the frame. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a vehicle frame strength detection device, which can well simulate the stress condition of the frame in actual application, thereby accurately detecting the strength of the vehicle frame.

[0004] The automobile frame strength detection device of the present invention comprises: A platform, wherein a first gantry is straddled in the middle of the platform; A wheel fatigue strength detection unit, wherein the wheel fatigue strength detection unit is provided with two groups and respectively fixed at the two ends of the table; the wheel fatigue strength detection unit comprises a force-bearing platform, a lifting slot seat is pressed on the top of the force-bearing platform, a first guide rod is fixed at the four ends of the bottom of the lifting slot seat, the first guide rod is movably embedded in the inner side of the force-bearing platform, a first hydraulic cylinder is also fixed on the inner side of the force-bearing platform, and the piston rod of the first hydraulic cylinder is fixed to the middle part of the top surface of the lifting slot seat; guide cylinders are fixed on both sides of the force-bearing platform, a second hydraulic cylinder is fixed on the inner side of the guide cylinder, and a convex column is movably provided on the upper side of the second hydraulic cylinder of the guide cylinder; a connecting bridge is movably pressed on the inner side of the lifting slot seat; fork platforms are movably pressed on the top surfaces of both ends of the connecting bridge; the convex column movably passes through the connecting bridge and is fixed to the bottom of the fork platform; A vehicle frame middle strength detection unit, the vehicle frame middle strength detection unit comprises four groups of columns that slide through the first gantry, a force plate is fixed on the top of the column, a pressing plate is fixed on the bottom of the column, and the pressing plate is directly opposite to the top surface of the longitudinal beam of the automobile frame; an adjustment plate is attached to the top surface of the first gantry, and the outer part of the adjustment plate is slidably mounted with the column; an adjustment hydraulic cylinder is fixed on the inner side of the first gantry, and the piston rod of the adjustment hydraulic cylinder movably passes through the first gantry and is fixed to the adjustment plate; longitudinal beam side clamps are arranged on both sides of the first gantry; The stamping unit comprises a second gantry, a third hydraulic cylinder is fixed on the top surface of the second gantry, a plurality of second guide rods are slidably arranged on the outside of the third hydraulic cylinder, and a stamping die head is fixed on the bottom of the third hydraulic cylinder and the second guide rods.

[0005] During operation, the longitudinal beam of the automobile frame is sent to the detection position, and then the two ends of the longitudinal beam are movably inserted into the fork platform, and the automobile frame can be positioned at four ends through the fork platform; the tire stress position of the automobile frame is aligned with the fork platform, and then the middle periphery of the top surface of the longitudinal beam of the automobile frame is clamped and limited by the longitudinal beam side clamp, and then the wheel position fatigue strength test is carried out, specifically: the wheel position fatigue strength detection unit is operated to drive the first hydraulic cylinder to move, and the first hydraulic cylinder drives the jacking slot seat to lift. When lifting, it is guided by the first guide rod, and the jacking slot seat drives the connecting bridge to be synchronously lifted, and drives the fork platform with the connecting bridge limit to move synchronously, so as to realize the synchronous application of the set hydraulic pressure to both sides of the front end of the automobile frame, and the synchronous application of the set hydraulic pressure to the rear end of the automobile frame. The set hydraulic pressure is applied synchronously on both sides until the front and rear sides of the automobile frame are subjected to the set number of hydraulic pressures, and the joint fatigue strength test of the front end of the automobile frame and the joint fatigue strength test of the rear end of the automobile frame are completed; then, the stress positions of each tire of the automobile frame are independently tested. During the test, the four groups of second hydraulic cylinders act asynchronously, and each outputs the set hydraulic pressure to drive the convex column to move, and the convex column movably extends out of the connecting bridge to drive the fork platform to move upward. Since the middle of the top surface of the automobile frame is positioned, the hydraulic pressure of the second hydraulic cylinder can fully act on the tire stress position of the automobile frame; the second hydraulic cylinder reciprocates until the set number of times is reached, and the fatigue strength test of the tire stress position of each automobile frame is completed; After completing the fatigue strength test of the tire stress position of the automobile frame, the overall stress test of the frame is then carried out. During the test, the longitudinal beam side clamp is separated from the longitudinal beam of the automobile frame; at this time, the four ends of the automobile frame are positioned by the fork platform; then, the adjustment hydraulic cylinder retracts, so that the column, the force plate and the pressing plate are subjected to their own weight and slide down along the first gantry. At this time, the force plate is pressed to the two sides of the top surface of the longitudinal beam of the automobile frame. Then, the third hydraulic cylinder drives the stamping die head to move. When it moves, it is guided by the second guide rod; the stamping die head is pressed to the force plate, and the hydraulic pressure is transmitted to the top surface of the longitudinal beam of the automobile frame through the column and the pressing plate through the force plate; the third hydraulic cylinder outputs the set stamping strength and stamps the longitudinal beam of the automobile frame. After the stamping is completed, the third hydraulic cylinder and the adjustment hydraulic cylinder are reset; After completing the inspection items, remove the automobile frame from the fork platform, first observe with the naked eye to determine whether the appearance is deformed. If deformed, it is determined that the automobile frame does not reach the set strength. When it cannot be determined by the naked eye, it is inspected by a measuring ruler. If the deformation size (automobile frame height, length measurement and linearity) exceeds the set value, it is determined that the automobile frame does not reach the set strength. When the deformation size does not exceed the set value, an ultrasonic flaw detector and a weld flaw detector are used for in-depth inspection to achieve the overall inspection of the frame, the wheel stress position, and the crossbeam and longitudinal beam connection positions. When the inspection indicators meet the standards, it is determined that the vehicle frame strength meets the requirements, otherwise it is determined that the automobile frame does not meet the standards.

[0006] Furthermore, the laterally adjacent columns are slidably provided with follower guide seats; the follower guide seats are movably fitted to the top surface of the pressing plate; the two columns can be supported and guided by the follower guide seats to prevent the columns from bending due to the long sliding stroke; the columns can be protected to always maintain good linearity; in addition, the pressing plate is pressed onto the longitudinal beam of the automobile frame by the counterweight of the follower guide seat, so that the automobile frame can be temporarily positioned to prevent the wheel position of the automobile frame and the wheel position fatigue strength detection unit from being offset when the automobile frame enters the second gantry.

[0007] Furthermore, the longitudinal beam side clamp includes a force-bearing groove opened on both sides of the first gantry, a dovetail seat is slidably arranged on the inner side of the force-bearing groove, a third guide rod is fixed on one side of the two dovetail seats away from each other, the third guide rod slides through the first gantry, a clamping hydraulic cylinder is fixed on the outside of the first gantry, the piston rod of the clamping hydraulic cylinder movably passes through the first gantry and is fixed to the dovetail seat; a side clamp seat is movably engaged with the dovetail seat; the side clamp seat is movably fitted with the outer wall of the longitudinal beam of the automobile frame; the side clamp seat is screwed with limiting bolts on both sides of the dovetail seat; before testing, a side clamp seat matching with the longitudinal beam structure of the automobile frame is selected first, so that after the longitudinal beam is clamped into the side clamp seat, it can The outer wall of the longitudinal beam is fitted with the inner wall of the side clamp seat to ensure the force consistency of the longitudinal beam at the side clamp seat. During installation, the side clamp seat is directly embedded with the dovetail seat and limited by the limit bolt. After the limitation is completed, the middle of the two sides of the frame can be positioned. Specifically, the dovetail seat is pushed to slide to the middle through the clamping hydraulic cylinder. When sliding, the third guide rod is used to guide the longitudinal beam to be movably inserted into the inner side of the side clamp seat. After the insertion is completed, the wheel fatigue strength test can be carried out, and the automobile frame transfers the load to the side clamp seat, and because the side clamp seat is limited by the first gantry, the load is transferred to the first gantry; after the wheel fatigue strength test is completed, the side clamp seat is reset and separated from the longitudinal beam of the automobile frame.

[0008] Furthermore, the stamping die head includes a stamping seat, the bottom surface of which is provided with two rows of dovetail grooves, and stamping blocks are slidably arranged at both ends of the dovetail grooves; two transposition hydraulic cylinders are fixed at each of the dovetail grooves through a support plate; the piston rod of the transposition hydraulic cylinder is fixed to the stamping block through a transmission rod; the bottom of the third hydraulic cylinder and the second guide rod is fixed to the top surface of the stamping seat; when the stamping die head is stamping, independent four-point detection can be carried out respectively. During independent detection, the transposition hydraulic cylinder is controlled to move. For each movement, one group of the four groups of stamping blocks is aligned with the force plate. When the third hydraulic cylinder drives the stamping die head to move, one group of the four groups of stamping blocks pushes the force plate, and a point on the top of the longitudinal beam of the automobile frame is stamped through the force plate, the column and the pressing plate. The third hydraulic cylinder is controlled to continuously feed to the set hydraulic pressure to simulate the force on a certain point of the longitudinal beam of the automobile frame; after completing the four-point detection in sequence, the longitudinal beam double-point detection is carried out During the double-point detection, the transposition hydraulic cylinder is controlled to move so that the two groups of stamping blocks facing the same longitudinal beam of the automobile frame are aligned with the force plate. When the third hydraulic cylinder drives the stamping die head to move, two of the four groups of stamping blocks push the force plate, and the top of a longitudinal beam of the automobile frame is stamped through the force plate, the column and the pressing plate. The third hydraulic cylinder is controlled to continuously feed to the set hydraulic pressure to simulate the force of a longitudinal beam of the automobile frame; after completing the detection of the two longitudinal beams; a joint force test is performed. During the joint test, the transposition hydraulic cylinder is controlled to move so that the four groups of stamping blocks are aligned with the force plate. Then, when the third hydraulic cylinder drives the stamping die head to move, the four groups of stamping blocks synchronously push the force plate, and the top of the longitudinal beam of the automobile frame is synchronously stamped through the force plate, the column and the pressing plate. The third hydraulic cylinder is controlled to continuously feed to the set hydraulic pressure to simulate the overall force of the automobile frame. After the test is completed, the stamping die head and the pressing plate are reset and separated from the automobile frame.

[0009] Furthermore, the side parts of the first gantry are fixed to the two sides of the second gantry; the second gantry is a movable gantry, and the second gantry rolls and walks on the ground rails on both sides of the table; the first gantry and the second gantry are used as movable cross-connectors, and when the automobile frame is loaded, the first gantry and the second gantry can be pushed away from the wheel fatigue strength detection unit first, and then the automobile frame is loaded into the wheel fatigue strength detection unit, so that the tire stress-bearing part of the automobile frame is aligned with the wheel fatigue strength detection unit, and after the loading is completed, the first gantry and the second gantry are pushed to the detection position, and then the automobile frame strength detection is carried out. After the detection is completed, the first gantry and the second gantry are pushed away again to complete the detection of the automobile frame; it is convenient for the automobile frame to be detected to be put on and off the line.

[0010] Furthermore, it also includes a platform, on which a slide is provided, and the table plate is slidably provided on the slide, and the first gantry is fixed to the table plate; the second gantry is fixed to the platform; a locking pin is slidably provided on the table plate, and the locking pin is movably engaged with the locking hole of the platform; the second gantry is first fixed to the platform, and the slide is passed through the bridging position of the second gantry. During operation, the table plate can be pushed into the second gantry to perform a strength test on the automobile frame. One end of the slide is hollow and the other end is solid. When the table plate slides to the solid end, one end of the table plate is limited, and the other end is limited by the cooperation of the locking pin and the locking hole.

[0011] Furthermore, a push handle is fixed to the end of the platform. During operation, the automobile frame to be inspected is first placed above the platform, and then the push handle is held to drive the platform to slide to the second gantry, and the position of the platform is locked by a locking pin.

[0012] Furthermore, the platform is provided with a walking groove in the middle of the slide, a chain drive is arranged on the inner side of the walking groove, and the table plate is fixed to the chain of the chain drive; the chain drive includes a driving sprocket and a driven sprocket arranged at both ends of the walking groove, and a chain arranged on the driving sprocket and the driven sprocket. When the motor drives the driving sprocket to rotate, the driving sprocket drives the chain to move, thereby driving the table plate to slide along the slide, so that the loaded automobile frame enters the second gantry, and the position of the table plate is locked by a locking pin.

[0013] Compared with the prior art, the automobile frame strength detection device of the present invention can apply load and impact force to the main stress-bearing parts of the automobile frame through the detection device, and can well simulate the stress conditions of the frame in actual application. After completing the detection items, the appearance deformation detection is first carried out, and then in-depth detection is carried out through ultrasonic flaw detectors and weld flaw detectors, which can accurately determine whether the automobile frame strength meets the vehicle application strength requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the installation structure of the table plate and wheel position fatigue strength detection unit of the present invention.

[0015] Figure 2 It is a schematic diagram of the installation structure of the table plate, the first gantry and the wheel fatigue strength detection unit of the present invention.

[0016] Figure 3 It is a schematic diagram of the installation structure of the first gantry, columns, force-bearing plates and pressing plates of the present invention.

[0017] Figure 4 It is a schematic diagram of the installation structure of the platform, the first gantry, the wheel fatigue strength detection unit and the frame middle strength detection unit of the present invention.

[0018] Figure 5It is a schematic diagram of the overall structure of the punching die head of the present invention.

[0019] Figure 6 It is a schematic diagram of the installation structure of the punching block, the support plate and the transposition hydraulic cylinder of the present invention.

[0020] Figure 7 It is a schematic diagram of the installation structure of an embodiment of the wheel fatigue strength detection unit, the frame middle strength detection unit and the stamping unit of the present invention.

[0021] Figure 8 It is a schematic diagram of the installation structure of another embodiment of the wheel fatigue strength detection unit, the frame middle strength detection unit and the stamping unit of the present invention.

[0022] Fig. 9 The figure is a schematic structural diagram of the automobile frame strength detection device with manual push feeding of the present invention.

[0023] Fig.10 The present invention is a schematic structural diagram of a chain-driven feeding automobile frame strength detection device.

[0024] Figure numerals: 1, table top, 2, first gantry, 3, force platform, 4, lifting slot seat, 5, first guide rod, 6, first hydraulic cylinder, 7, guide cylinder, 8, second hydraulic cylinder, 9, boss, 10, connecting bridge, 11, fork platform, 12, column, 13, force plate, 14, pressing plate, 15, adjustment plate, 16, adjustment hydraulic cylinder, 17, second gantry, 18, third hydraulic cylinder, 19, second guide rod, 20, follow-up guide seat, 21, dovetail seat, 22, third guide rod, 23, clamping hydraulic cylinder, 24, side clamp seat, 25, stamping seat, 26, stamping block, 27, support plate, 28, transposition hydraulic cylinder, 29, platform, 30, slide, 31, locking pin, 32, push handle, 33, chain drive. DETAILED DESCRIPTION

[0025] Example: like Figures 1 to 10 The automobile frame strength testing device shown comprises: A platform 1, wherein a first gantry 2 is straddled in the middle of the platform 1; Wheel fatigue strength detection unit, the wheel fatigue strength detection unit is provided with two groups, and is respectively fixed at the two ends of the platform 1; the wheel fatigue strength detection unit includes a force-bearing platform 3, the top of the force-bearing platform 3 is pressed with a lifting groove seat 4, the four ends of the bottom of the lifting groove seat 4 are fixed with a first guide rod 5, the first guide rod 5 is movably embedded in the inner side of the force-bearing platform 3, the inner side of the force-bearing platform 3 is also fixed with a first hydraulic cylinder 6, the piston rod of the first hydraulic cylinder 6 is fixed to the middle part of the top surface of the lifting groove seat 4; guide cylinders 7 are fixed on both sides of the force-bearing platform 3, the inner side of the guide cylinder 7 is fixed with a second hydraulic cylinder 8, and the guide cylinder 7 is movably provided with a convex column 9 above the second hydraulic cylinder 8; a connecting bridge 10 is movably pressed on the inner side of the lifting groove seat 4; fork platforms 11 are movably pressed on the top surfaces of the two ends of the connecting bridge 10; the convex column 9 movably passes through the connecting bridge 10 and is fixed to the bottom of the fork platform 11; A vehicle frame middle strength detection unit, the vehicle frame middle strength detection unit comprises four groups of columns 12 slidingly passing through the first gantry 2, a force plate 13 is fixed on the top of the column 12, a pressing plate 14 is fixed on the bottom of the column 12, and the pressing plate 14 is directly opposite to the top surface of the longitudinal beam of the automobile frame; an adjustment plate 15 is attached to the top surface of the first gantry 2, and the outer part of the adjustment plate 15 is slidably mounted with the column 12; an adjustment hydraulic cylinder 16 is fixed on the inner side of the first gantry 2, and the piston rod of the adjustment hydraulic cylinder 16 movably passes through the first gantry 2 and is fixed to the adjustment plate 15; longitudinal beam side clamps are arranged on both sides of the first gantry 2; The stamping unit comprises a second gantry 17, a third hydraulic cylinder 18 is fixed on the top surface of the second gantry 17, and a plurality of second guide rods 19 are slidably arranged outside the third hydraulic cylinder 18 on the second gantry 17; a stamping die head is fixed at the bottom of the third hydraulic cylinder 18 and the second guide rods 19.

[0026] During operation, the longitudinal beam of the automobile frame is sent to the detection position, and then the two ends of the longitudinal beam are movably inserted into the fork platform 11, and the four ends of the automobile frame can be positioned by the fork platform 11; the tire stress position of the automobile frame is aligned with the fork platform 11, and then the middle periphery of the top surface of the longitudinal beam of the automobile frame is clamped and limited by the longitudinal beam side clamp, and then the wheel position fatigue strength test is carried out, specifically: the wheel position fatigue strength detection unit is operated to drive the first hydraulic cylinder 6 to act, and the first hydraulic cylinder 6 drives the jacking slot seat 4 to jack up. When jacking, it is guided by the first guide rod 5, and the jacking slot seat 4 drives the connecting bridge 10 to jack up synchronously, and drives the fork platform 11 limited by the connecting bridge 10 to act synchronously, thereby realizing the synchronous application of the set hydraulic pressure to both sides of the front end of the automobile frame, and the synchronous The set hydraulic pressure is synchronously applied to both sides of the rear end of the frame until both sides of the front end and both sides of the rear end of the automobile frame are subjected to the set number of hydraulic pressures, and the joint fatigue strength test of the front end of the automobile frame and the joint fatigue strength test of the rear end of the automobile frame are completed; then, the stress positions of each tire of the automobile frame are independently tested. During the test, the four groups of second hydraulic cylinders 8 act asynchronously, and each outputs the set hydraulic pressure to drive the boss 9 to act, and the boss 9 movably extends out of the connecting bridge 10 to drive the fork platform 11 to push up. Since the middle of the top surface of the automobile frame is positioned, the hydraulic pressure of the second hydraulic cylinder 8 can fully act on the tire stress position of the automobile frame; the second hydraulic cylinder 8 reciprocates until the set number of times is reached, and the fatigue strength test of the tire stress position of each automobile frame is completed; After completing the fatigue strength test of the tire stress position of the automobile frame, the overall stress test of the frame is then carried out. During the test, the side clamps of the longitudinal beam are separated from the longitudinal beam of the automobile frame; at this time, the four ends of the automobile frame are positioned by the fork platform 11; then, the positioning hydraulic cylinder 16 retracts, so that the column 12, the force plate 13 and the pressing plate 14 are subjected to their own weight and slide down along the first gantry 2. At this time, the force plate 13 is pressed onto the two sides of the top surface of the longitudinal beam of the automobile frame. Then, the third hydraulic cylinder 18 drives the stamping die head to move. During the movement, the second guide rod 19 is used for sliding guidance; the stamping die head is pressed onto the force plate 13, and the hydraulic pressure is transmitted to the top surface of the longitudinal beam of the automobile frame through the force plate 13 through the column 12 and the pressing plate 14; the third hydraulic cylinder 18 outputs the set stamping strength to stamp the longitudinal beam of the automobile frame. After the stamping is completed, the third hydraulic cylinder 18 and the positioning hydraulic cylinder 16 are reset; After completing the inspection items, take down the automobile frame on the fork platform 11, first observe with the naked eye to determine whether the appearance is deformed, if deformed, it is determined that the automobile frame does not reach the set strength, when the naked eye cannot determine, it is inspected by a measuring ruler, if the deformation size (automobile frame height, length measurement and linearity) exceeds the set value, it is determined that the automobile frame does not reach the set strength, when the deformation size does not exceed the set value, it is further inspected by an ultrasonic flaw detector and a weld flaw detector to achieve the overall inspection of the frame, the wheel stress position, and the crossbeam and longitudinal beam connection position. When the inspection index meets the standard, it is determined that the vehicle frame strength meets the requirement, otherwise it is determined that the automobile frame does not meet the standard.

[0027] The laterally adjacent columns 12 are slidably provided with follower guide seats 20; the follower guide seats 20 are movably fitted to the top surface of the pressing plate 14; the two columns 12 can be supported and guided by the follower guide seats 20 to prevent the columns 12 from bending due to the long sliding stroke; the columns 12 can be protected to always maintain good linearity; in addition, through the counterweight of the follower guide seats 20, the pressing plate 14 is pressed onto the longitudinal beam of the automobile frame, and the automobile frame can be temporarily positioned to prevent the wheel position of the automobile frame and the wheel position fatigue strength detection unit from being offset when the automobile frame enters the second gantry 17.

[0028] The longitudinal beam side clamp includes a force-bearing groove opened on both sides of the first gantry 2, and a dovetail seat 21 is slidably arranged inside the force-bearing groove. A third guide rod 22 is fixed on one side of the two dovetail seats 21 away from each other, and the third guide rod 22 slides through the first gantry 2. A clamping hydraulic cylinder 23 is fixed on the outside of the first gantry 2, and the piston rod of the clamping hydraulic cylinder 23 movably passes through the first gantry 2 and is fixed to the dovetail seat 21; a side clamping seat 24 is movably engaged on the dovetail seat 21; the side clamping seat 24 is movably fitted with the outer wall of the longitudinal beam of the automobile frame; the side clamping seat 24 is screwed with limiting bolts on both sides of the dovetail seat 21; before testing, a side clamping seat 24 matching with the longitudinal beam structure of the automobile frame is selected first, and after the longitudinal beam is clamped into the side clamping seat 24, The outer wall of the longitudinal beam can be fitted with the inner wall of the side clamping seat 24 to ensure the force consistency of the longitudinal beam at the side clamping seat 24. During installation, the side clamping seat 24 is directly embedded with the dovetail seat 21 and limited by the limit bolt. After the limitation is completed, the middle of the two sides of the frame can be positioned. Specifically, the dovetail seat 21 is pushed to slide to the middle by the clamping hydraulic cylinder 23. During sliding, the third guide rod 22 is used for guidance so that the longitudinal beam can be movably inserted into the inner side of the side clamping seat 24. After the insertion is completed, the wheel fatigue strength test can be carried out, and the automobile frame transfers the load to the side clamping seat 24, and because the side clamping seat 24 is limited by the first gantry 2, the load is transferred to the first gantry 2; after the wheel fatigue strength test is completed, the side clamping seat 24 is reset and separated from the longitudinal beam of the automobile frame.

[0029] The punching die head comprises a punching seat 25, the bottom surface of which is provided with two rows of dovetail grooves, and punching blocks 26 are slidably arranged at both ends of the dovetail grooves; two transposition hydraulic cylinders 28 are fixed at each of the dovetail grooves through a support plate 27; the piston rod of the transposition hydraulic cylinder 28 is fixed to the punching block 26 through a transmission rod; the bottom of the third hydraulic cylinder 18 and the second guide rod 19 are fixed to the top surface of the punching seat 25; when the punching die head is punching, independent four-point detection can be performed first, and during the independent detection, the transposition hydraulic cylinder 28 is controlled. The cylinder 28 moves, and each time it moves, one of the four groups of punching blocks 26 is aligned with the force plate 13. When the third hydraulic cylinder 18 drives the punching die head to move, one of the four groups of punching blocks 26 pushes the force plate 13, and punches a point on the top of the longitudinal beam of the automobile frame through the force plate 13, the column 12 and the pressing plate 14. The third hydraulic cylinder 18 is controlled to continuously feed to the set hydraulic pressure to simulate the force on a certain point of the longitudinal beam of the automobile frame; after completing the four-point detection in sequence, the longitudinal beam double-point detection is carried out, and the double-point inspection During the test, the transposition hydraulic cylinder 28 is controlled to move, so that the two groups of punching blocks 26 facing the same longitudinal beam of the automobile frame are aligned with the force plate 13. When the third hydraulic cylinder 18 drives the punching die head to move, two of the four groups of punching blocks 26 push the force plate 13, and the top of a longitudinal beam of the automobile frame is punched through the force plate 13, the column 12 and the pressing plate 14. The third hydraulic cylinder 18 is controlled to continuously feed to the set hydraulic pressure to simulate the force of a longitudinal beam of the automobile frame. After completing the test of the two longitudinal beams, the joint force is carried out. During the combined inspection, the transposition hydraulic cylinder 28 is controlled to move so that the four groups of punching blocks 26 are aligned with the force plate 13. Then, when the third hydraulic cylinder 18 drives the punching die to move, the four groups of punching blocks 26 synchronously push the force plate 13, and the top of the longitudinal beam of the automobile frame is synchronously punched through the force plate 13, the column 12 and the pressing plate 14. The third hydraulic cylinder 18 is controlled to continuously feed to the set hydraulic pressure to simulate the overall force of the automobile frame. After the inspection is completed, the punching die and the pressing plate 14 are reset and separated from the automobile frame.

[0030] like Figure 7 As shown, the side of the first gantry 2 is fixed to the two sides of the second gantry 17; the second gantry 17 is a movable gantry, and the second gantry 17 rolls and walks on the ground rails on both sides of the platform 1; the first gantry 2 and the second gantry 17 are used as movable cross-connectors. When the automobile frame is loaded, the first gantry 2 and the second gantry 17 can be pushed away from the wheel fatigue strength detection unit first, and then the automobile frame is loaded into the wheel fatigue strength detection unit so that the tire stress-bearing part of the automobile frame is aligned with the wheel fatigue strength detection unit. After loading is completed, the first gantry 2 and the second gantry 17 are pushed to the detection position, and then the automobile frame strength detection is carried out. After the detection is completed, the first gantry 2 and the second gantry 17 are pushed away again to complete the detection of the automobile frame; it is convenient for the automobile frame to be detected to be put on and off the line.

[0031] It also includes a platform 29, on which a slide 30 is provided, and the table plate 1 is slidably provided on the slide 30, and the first gantry 2 is fixed to the table plate 1; the second gantry 17 is fixed to the platform 29; a locking pin 31 is slidably provided on the table plate 1, and the locking pin 31 is movably engaged with the locking hole of the platform 29; the second gantry 17 is first fixed to the platform 29, and the slide 30 is passed through the bridging position of the second gantry 17. During operation, the table plate 1 can be pushed into the second gantry 17 to perform a strength test on the automobile frame. One end of the slide 30 is hollow and the other end is solid. When the table plate 1 slides to the solid end, one end of the table plate 1 is limited, and the other end is limited by the cooperation of the locking pin 31 and the locking hole.

[0032] A push handle 32 is fixed at the end of the platform 1. During operation, the automobile frame to be inspected is first placed above the platform 1. Then, the push handle 32 is held to drive the platform 1 to slide to the second gantry 17, and the position of the platform 1 is locked by the locking pin 31.

[0033] The platform 29 is provided with a walking groove in the middle of the slide 30, and a chain driver 33 is arranged inside the walking groove, and the table 1 is fixed to the chain of the chain driver 33; the chain driver 33 includes a driving sprocket and a driven sprocket arranged at both ends of the walking groove, and a chain arranged on the driving sprocket and the driven sprocket. When the motor drives the driving sprocket to rotate, the driving sprocket drives the chain to move, thereby driving the table 1 to slide along the slide 30, so that the loaded automobile frame enters the second gantry 17, and the position of the table 1 is locked by the locking pin 31.

[0034] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A vehicle frame strength testing device, characterized in that: include: A platform, wherein a first gantry is straddled in the middle of the platform; A wheel fatigue strength detection unit, wherein the wheel fatigue strength detection unit is provided with two groups and respectively fixed at the two ends of the table; the wheel fatigue strength detection unit comprises a force-bearing platform, a lifting slot seat is pressed on the top of the force-bearing platform, a first guide rod is fixed at the four ends of the bottom of the lifting slot seat, the first guide rod is movably embedded in the inner side of the force-bearing platform, a first hydraulic cylinder is also fixed on the inner side of the force-bearing platform, and the piston rod of the first hydraulic cylinder is fixed to the middle part of the top surface of the lifting slot seat; guide cylinders are fixed on both sides of the force-bearing platform, a second hydraulic cylinder is fixed on the inner side of the guide cylinder, and a convex column is movably provided on the upper side of the second hydraulic cylinder of the guide cylinder; a connecting bridge is movably pressed on the inner side of the lifting slot seat; fork platforms are movably pressed on the top surfaces of both ends of the connecting bridge; the convex column movably passes through the connecting bridge and is fixed to the bottom of the fork platform; A vehicle frame middle strength detection unit, the vehicle frame middle strength detection unit comprises four groups of columns that slide through the first gantry, a force plate is fixed on the top of the column, a pressing plate is fixed on the bottom of the column, and the pressing plate is directly opposite to the top surface of the longitudinal beam of the automobile frame; an adjustment plate is attached to the top surface of the first gantry, and the outer part of the adjustment plate is slidably mounted with the column; an adjustment hydraulic cylinder is fixed on the inner side of the first gantry, and the piston rod of the adjustment hydraulic cylinder movably passes through the first gantry and is fixed to the adjustment plate; longitudinal beam side clamps are arranged on both sides of the first gantry; The stamping unit comprises a second gantry, a third hydraulic cylinder is fixed on the top surface of the second gantry, a plurality of second guide rods are slidably arranged on the outside of the third hydraulic cylinder, and a stamping die head is fixed on the bottom of the third hydraulic cylinder and the second guide rods.

2. The automobile frame strength detection device according to claim 1, characterized in that: The columns adjacent to each other in the transverse direction are slidably provided with follower guide seats; the follower guide seats are movably fitted to the top surface of the pressing disk.

3. The automobile frame strength detection device according to claim 1, characterized in that: The longitudinal beam side clamp includes a force-bearing groove opened on both sides of the first gantry, a dovetail seat is slidably arranged on the inner side of the force-bearing groove, a third guide rod is fixed on one side of the two dovetail seats away from each other, the third guide rod slides through the first gantry, a clamping hydraulic cylinder is fixed on the outside of the first gantry, the piston rod of the clamping hydraulic cylinder movably passes through the first gantry and is fixed to the dovetail seat; a side clamp seat is movably engaged with the dovetail seat; the side clamp seat is movably fitted with the outer wall of the longitudinal beam of the automobile frame; the side clamp seat is screwed with limit bolts on both sides of the dovetail seat.

4. The automobile frame strength detection device according to claim 1, characterized in that: The stamping die head includes a stamping seat, the bottom surface of which is provided with two rows of dovetail grooves, and stamping blocks are slidably arranged at both ends of the dovetail grooves; two transposition hydraulic cylinders are fixed at each of the dovetail grooves through a support plate; the piston rod of the transposition hydraulic cylinder is fixed to the stamping block through a transmission rod; the bottom of the third hydraulic cylinder and the second guide rod are fixed to the top surface of the stamping seat.

5. The automobile frame strength detection device according to claim 1, characterized in that: The side parts of the first gantry are fixed to the inner two sides of the second gantry; the second gantry is a movable gantry frame, and the second gantry rolls and moves on the ground rails on the two sides of the platform.

6. The automobile frame strength detection device according to claim 1, characterized in that: It also includes a platform, the platform is provided with a slideway, the table plate is slidably arranged on the slideway, the first gantry is fixed to the table plate; the second gantry is fixed to the platform; a locking pin is slidably arranged on the table plate, and the locking pin is movably engaged with a locking hole of the platform.

7. The automobile frame strength detection device according to claim 6, characterized in that: A hand push handle is fixed at the end of the table plate.

8. The automobile frame strength detection device according to claim 6, characterized in that: The platform is provided with a walking groove in the middle of the slideway, a chain driver is arranged inside the walking groove, and the platform plate is fixed to the chain of the chain driver.

Images