Strength detection platform for lower protective device of automobile

Abstract

The invention belongs to the technical field of vehicle detection, and discloses an automobile lower protection device strength detection platform, which comprises a base, two groups of fixing pins are rotatably mounted on the upper surface of the base, the middle part of each group of fixing pins is sleeved with a fixing plate, and a driving motor is fixedly mounted on the right side of the bottom of the base. A motor is controlled to work, a winding roll rotates to drive a bearing plate to the distance away from the target height of the upper surface of the protection device, an electromagnetic sleeve is powered on, a magnetic block and a limiting block are pushed to move towards the outer side, and an extrusion spring is extruded; at the moment, the rectangular rod moves downwards due to the gravity of a bearing plate and a balancing weight below the rectangular rod, the rotating plate rotates, limiting of the rectangular rod is relieved, and when the bearing plate and the balancing weight fall on the upper surface of the protection device, the dynamic impact test is completed. The problem that an existing detection mode cannot reflect the dynamic impact strength of the automobile lower protection device is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle detection, and in particular relates to a strength detection platform for a lower protective device of an automobile. Background Art

[0002] In various traffic accidents in my country, since many trucks on the road do not have good rear underbody protection devices, it is easy for a passenger car to get into the rear of a large truck in a rear-end collision with a truck. The driver and passengers in the rear-end collision have a very high casualty rate, which is one of the most serious accidents with a very high fatality rate. Therefore, the mandatory installation of underbody protection devices on large trucks is the only technical measure to improve the safety of underbody collisions. At present, large trucks are already required to install underbody protection devices.

[0003] The existing strength test of the lower protective device of the automobile is to apply pressure to it by a hydraulic rod to perform static strength test of the lower protective device of the automobile. However, although this method can reflect the strength of the lower protective device of the automobile to a certain extent, it cannot reflect the strength of the dynamic collision of the lower protective device of the automobile in the dynamic collision that usually occurs in reality. Moreover, the protective device will be deformed after the test, and the existing protective device strength test platform cannot quickly and accurately measure the phase variable of the protective device, and it is difficult to meet the requirements of strength test. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle lower protection device strength testing platform to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vehicle lower protection device strength detection platform, comprising a base, two groups of fixing pins are rotatably installed on the upper surface of the base, a fixing plate is sleeved in the middle of each group of fixing pins, a driving motor is fixedly installed on the right side of the bottom of the base, a rotating threaded rod is fixedly connected to the output end of the driving motor, L plates are fixedly connected on the left and right sides of the base, an elastic pad is fixedly connected on the upper surface of the L plate, a sliding rod is fixedly connected between the two L plates, the middle part of the sliding rod is slidably connected to the detection mechanism, and a connecting rod is fixedly connected on the upper surface of the base. A column, a control motor is fixedly installed on the upper surface of the connecting column, the output shaft of the control motor is fixedly connected to a cable reel, a cable is arranged inside the cable reel, the bottom end of the cable is fixedly connected to a clamping mechanism, a rectangular rod is installed in the middle of the clamping mechanism, two fixed threaded rods are fixedly connected to the lower surface of the rectangular rod, a fixed sleeve is threadedly connected to the middle part of the fixed threaded rod, the bottom ends of the two fixed threaded rods are fixedly connected to a load-bearing plate, a plurality of counterweights are installed above the load-bearing plate, two connecting shafts are fixedly connected to the right side of the connecting column, and a guide wheel is rotatably installed in the middle part of the connecting shaft.

[0006] Preferably, the detection mechanism includes a sliding block, a processor is fixedly mounted on the upper surface of the sliding block, a plurality of gas shells are fixedly mounted on the upper surface of the processor, a pressure sensor is fixedly mounted on the bottom of the gas shell, a sliding column is slidably connected to the top of the gas shell, a rotating ball is movably mounted on the top of the sliding column, and a sealing gasket is fixedly connected to the lower end of the sliding column.

[0007] Preferably, the clamping mechanism includes a chuck, two rotating cavities are provided inside the chuck, a fixed column is fixedly connected to the middle of the rotating cavity, a rotating plate is rotatably installed in the middle of the fixed column, a plurality of curved springs are fixedly installed on the lower surface of the rotating plate, a limit block is provided on the outer side of the rotating plate, a magnetic block is fixedly connected to the outer end of the limit block, a plurality of extrusion springs are fixedly connected to the outer side of the magnetic block, and an electromagnetic sleeve is provided in the middle of the rotating plate.

[0008] Preferably, the rotating threaded rods are rotatably connected to the two L-plates, the inner end of the cable is fixedly mounted to the middle of the cable reel, and the two guide wheels are in contact with the cable.

[0009] Preferably, the sliding block is threadedly connected to the rotating threaded rod, the sealing gasket is adapted to the inner wall of the gas shell, and the plurality of gas shells are divided into two groups, and the gas shells of one group are located in the spacing of the gas shells of the other group.

[0010] Preferably, the two rotating chambers are symmetrically opened, the lower ends of the plurality of curved springs are fixedly connected to the chuck, the electromagnetic sleeve is fixedly connected to the chuck, and the limit block is slidably connected to the chuck.

[0011] Preferably, the interior of the gas shell is filled with gas, and a groove is formed on the upper surface of the outer end of the rotating plate.

[0012] The beneficial effects of the present invention are as follows: 1. The present invention controls the operation of the motor, and the winding reel is rotated to bring the load-bearing plate to a target height distance from the upper surface of the protective device. The electromagnetic sleeve is energized to push the magnetic block and the limit block to move outward and squeeze the extrusion spring. When the limit block no longer restricts the rotating plate, the rectangular rod will move downward due to the gravity of the load-bearing plate and the counterweight block below, and the rotating plate will rotate, thereby releasing the restriction on the rectangular rod. When the load-bearing plate and the counterweight block fall on the upper surface of the protective device, the dynamic impact test is completed, which solves the problem that the existing detection method cannot reflect the dynamic impact strength of the lower protective device of the automobile.

[0013] 2. The present invention works by driving the motor to drive the rotating threaded rod to rotate. The rotation of the rotating threaded rod will drive the sliding block to slide, thereby adjusting the position of the detection mechanism. When the rotating ball slides over the lower surface of the protective device, the sliding column will slide downward, thereby changing the pressure of the air shell. The pressure sensor will transmit the pressure change data to the processor. The processor can calculate the deformation of the protective device based on the difference between the two pressures, thereby solving the problem that the existing protective device strength detection platform cannot quickly and accurately measure the phase variable of the protective device, and it is difficult to meet the strength detection requirements.

[0014] 3. The present invention energizes the electromagnetic sleeve to push the magnetic block and the limit block to move outward and squeeze the extrusion spring. When the limit block no longer limits the rotating plate, the rectangular rod will move downward due to the gravity of the load-bearing plate and the counterweight block below, and the rotating plate will rotate, thereby releasing the limit on the rectangular rod; after the rectangular rod slides down, the curved spring will pull the rotating plate to reset, and at the same time the electromagnetic sleeve is powered off, the limit block will be located inside the groove of the rotating plate, and the rectangular rod can be pressed into the middle of the clamping mechanism, thereby achieving rapid clamping and falling off of the rectangular rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structural appearance of the present invention; Figure 2 This is a schematic diagram of the structure of the counterweight block of the present invention; Figure 3 It is a schematic diagram of the structure of the detection mechanism of the present invention; Figure 4 A half-section schematic diagram of the chuck of the present invention; Figure 5 A half-section schematic diagram of the electromagnetic sleeve of the present invention; Figure 6 It is a schematic diagram of the separation of the clamping mechanism structure of the present invention.

[0016] In the figure: 1. base; 2. fixing pin; 3. fixing plate; 4. driving motor; 5. rotating threaded rod; 6. L plate; 7. elastic pad; 8. sliding rod; 9. detection mechanism; 91. sliding block; 92. processor; 93. air shell; 94. pressure sensor; 95. sliding column; 96. rotating ball; 97. sealing pad; 10. connecting column; 11. control motor; 12. winding drum; 13. cable; 14. clamping mechanism; 141. chuck; 142. rotating cavity; 143. fixing column; 144. rotating plate; 145. bending spring; 146. limit block; 147. magnetic block; 148. extrusion spring; 149. electromagnetic sleeve; 15. rectangular rod; 16. fixed threaded rod; 17. fixing sleeve; 18. load-bearing plate; 19. counterweight block; 20. connecting shaft; 21. guide wheel. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 6As shown, an embodiment of the present invention provides a vehicle lower protection device strength testing platform, including a base 1, two groups of fixing pins 2 are rotatably installed on the upper surface of the base 1, and a fixing plate 3 is sleeved in the middle of each group of fixing pins 2, a driving motor 4 is fixedly installed on the right side of the bottom of the base 1, and a rotating threaded rod 5 is fixedly connected to the output end of the driving motor 4, and L plates 6 are fixedly connected to the left and right sides of the base 1, and an elastic pad 7 is fixedly connected to the upper surface of the L plate 6, a sliding rod 8 is fixedly connected between the two L plates 6, and the middle part of the sliding rod 8 is slidably connected to the detection mechanism 9, and the upper surface of the base 1 is fixed A connecting column 10 is connected, a control motor 11 is fixedly installed on the upper surface of the connecting column 10, a winding drum 12 is fixedly connected to the output shaft of the control motor 11, a cable 13 is arranged inside the winding drum 12, a clamping mechanism 14 is fixedly connected to the bottom end of the cable 13, a rectangular rod 15 is installed in the middle of the clamping mechanism 14, two fixed threaded rods 16 are fixedly connected to the lower surface of the rectangular rod 15, a fixed sleeve 17 is threadedly connected to the middle of the fixed threaded rod 16, a load-bearing plate 18 is fixedly connected to the bottom ends of the two fixed threaded rods 16, and a plurality of counterweights are installed above the load-bearing plate 18 19, the right side of the connecting column 10 is fixedly connected to two connecting shafts 20, the middle part of the connecting shaft 20 is rotatably mounted with a guide wheel 21, the detection mechanism 9 includes a sliding block 91, the upper surface of the sliding block 91 is fixedly mounted with a processor 92, the upper surface of the processor 92 is fixedly mounted with a plurality of gas shells 93, the bottom of the gas shell 93 is fixedly mounted with a pressure sensor 94, the top of the gas shell 93 is slidably connected with a sliding column 95, the top of the sliding column 95 is movably mounted with a rotating ball 96, the lower end of the sliding column 95 is fixedly connected with a sealing gasket 97, which functions to work by driving the motor 4, The rotating threaded rod 5 is driven to rotate, and the rotating threaded rod 5 is driven to slide the sliding block 91, thereby adjusting the position of the detection mechanism 9. When the rotating ball 96 slides over the lower surface of the protective device, the sliding column 95 will slide downward, thereby changing the pressure of the air shell 93. The pressure sensor 94 will transmit the pressure change data to the processor 92. The processor 92 can calculate the deformation of the protective device based on the difference between the two pressures, thereby solving the problem that the existing protective device strength detection platform cannot quickly and accurately measure the phase variable of the protective device, and it is difficult to meet the requirements of strength detection.

[0019] The clamping mechanism 14 includes a clamping head 141, and two rotating chambers 142 are provided inside the clamping head 141. A fixed column 143 is fixedly connected to the middle of the rotating chamber 142. A rotating plate 144 is rotatably installed in the middle of the fixed column 143. A plurality of curved springs 145 are fixedly installed on the lower surface of the rotating plate 144. A limit block 146 is arranged on the outer side of the rotating plate 144. A magnetic block 147 is fixedly connected to the outer end of the limit block 146. A plurality of extrusion springs 148 are fixedly connected to the outer side of the magnetic block 147. An electromagnetic sleeve 149 is arranged in the middle of the rotating plate 144. The electromagnetic sleeve 149 is used to rotate the winding drum 12 by controlling the operation of the motor 11. The load-bearing plate 18 is brought to the target height distance from the upper surface of the protective device, and the electromagnetic sleeve 149 is energized to push the magnetic block 147 and the limit block 146 to move outward and squeeze the extrusion spring 148. When the limit block 146 no longer restricts the rotating plate 144, the rectangular rod 15 will move downward due to the gravity of the load-bearing plate 18 and the counterweight block 19 below, and the rotating plate 144 will rotate, thereby releasing the limit on the rectangular rod 15. When the load-bearing plate 18 and the counterweight block 19 fall on the upper surface of the protective device, the dynamic impact test is completed, which solves the problem that the existing detection method cannot reflect the dynamic impact strength of the lower protective device of the vehicle.

[0020] Among them, the rotating threaded rod 5 is rotatably connected to the two L plates 6, the inner end of the cable 13 is fixedly installed in the middle of the winding drum 12, the two guide wheels 21 are in contact with the cable 13, the sliding block 91 is threadedly connected to the rotating threaded rod 5, the sealing gasket 97 is adapted to the inner wall of the gas shell 93, and the multiple gas shells 93 are divided into two groups, and one group of gas shells 93 is located in the spacing of the other group of gas shells 93. The two rotating chambers 142 are symmetrically opened, the lower ends of the multiple curved springs 145 are fixedly connected to the chuck 141, the electromagnetic sleeve 149 is fixedly connected to the chuck 141, the limit block 146 is slidably connected to the chuck 141, the interior of the gas shell 93 is filled with gas, and the upper surface of the outer end of the rotating plate 144 is provided with a groove, whose function is that when the electromagnetic sleeve 149 is energized, it pushes the magnetic block 147 and the limit block 146 to move outward and squeezes the squeezing spring 148. When the limit block 146 no longer presses the rotating plate 14 4 plays a limiting role. At this time, the rectangular rod 15 will move downward due to the gravity of the load-bearing plate 18 and the counterweight block 19 below, and the rotating plate 144 will rotate, thereby releasing the limit on the rectangular rod 15. After the rectangular rod 15 slides down, the curved spring 145 will pull the rotating plate 144 to reset, and at the same time, the electromagnetic sleeve 149 is powered off, and the limit block 146 will be located inside the groove of the rotating plate 144. By pressing the rectangular rod 15 into the middle of the clamping mechanism 14, the rectangular rod 15 can be quickly clamped.

[0021] Working principle: Before the present invention is used, the rectangular rod 15 is located in the middle of the clamping mechanism 14, and the clamping mechanism 14 is in a suspended middle position; When the present invention is used, the lower protective device of the automobile that needs to be tested for strength is placed on the upper part of the elastic pad 7, and then the fixing pin 2 is rotated so that the fixing plate 3 fixes and clamps the rear end of the protective device; When conducting a static loading test, according to the detection requirements, a corresponding number of counterweights 19 are placed on the upper surface of the load-bearing plate 18, the fixing sleeve 17 is rotated to fix the multiple counterweights 19, and the driving motor 4 is operated to drive the rotating threaded rod 5 to rotate. The rotation of the rotating threaded rod 5 will drive the sliding block 91 to slide. When the detection mechanism 9 is located directly below the load-bearing plate 18, the motor 11 is then controlled to operate to drive the cable reel 12 to rotate, so that the cable 13 is lowered. Under the gravity of the counterweight 19, the load-bearing plate 18 will slowly move downward, and the guide wheel 21 will rotate accordingly. When the gravity of the load-bearing plate 18 and the counterweight 19 all act on the protective device, the control motor 11 stops working. During the process, the protective device will be deformed by the gravity of the load-bearing plate 18 and the counterweight 19, so that the protective device will push the sliding column 95 to move downward. When the air shell 93 moves, the sealing gasket 97 will move with it, thereby reducing the volume of gas inside the air shell 93, thereby increasing the pressure inside the air shell 93, and the pressure sensor 94 will transmit the data of the pressure change to the processor 92. When the pressure application time of the load-bearing plate 18 and the counterweight block 19 is reached, the control motor 11 drives the cable reel 12 to rotate in the opposite direction, thereby driving the cable 13 to tighten, and driving the load-bearing plate 18 and the counterweight block 19 to move upward so that they do not contact the protective device. During the process, the protective device is restored, and the sliding column 95 will move upward, thereby reducing the pressure inside the air shell 93. If the pressure reading of the pressure sensor 94 is the same as the initial reading at this time; if the pressure reading of the pressure sensor 94 is larger than the initial reading at this time, the protective device is deformed, and the processor 92 can calculate the deformation of the protective device based on the difference between the two pressures; During the fatigue life test, a corresponding number of counterweights 19 are placed on the upper surface of the load-bearing plate 18, and the fixing sleeve 17 is rotated to fix the multiple counterweights 19. A corresponding number of counterweights 19 are placed on the upper surface of the load-bearing plate 18, and the fixing sleeve 17 is rotated to fix the multiple counterweights 19, and the detection mechanism 9 is located directly below the load-bearing plate 18. Then, the motor 11 is controlled to drive the winding reel 12 to rotate forward and reverse periodically, so that the gravity of the load-bearing plate 18 and the counterweights 19 is repeatedly applied to the upper surface of the protective device. During the process, the upper surface of the protective device will be subjected to a predetermined alternating load to simulate the repeated stress in long-term use, and the sliding column 95 will move up and down accordingly due to the protective device, thereby recording the deformation of the protective device during the fatigue life test. During the dynamic impact test, according to the test requirements, a corresponding number of counterweight blocks 19 are placed on the upper surface of the load-bearing plate 18, and the fixing sleeve 17 is rotated to fix the multiple counterweight blocks 19. The driving motor 4 is operated to drive the rotating threaded rod 5 to rotate, and the rotating threaded rod 5 will drive the sliding block 91 to slide to one side, and then the control motor 11 is operated to rotate the winding drum 12 to bring the load-bearing plate 18 to the target height distance from the upper surface of the protective device, and the electromagnetic sleeve 149 is energized to push the magnetic block 147 and the limit block 14 6 moves outward and squeezes the squeezing spring 148. When the limit block 146 no longer limits the rotating plate 144, the rectangular rod 15 will move downward due to the gravity of the load-bearing plate 18 and the counterweight block 19 below, and the rotating plate 144 will rotate, thereby releasing the limit on the rectangular rod 15. When the load-bearing plate 18 and the counterweight block 19 fall on the upper surface of the protective device, the dynamic impact test is completed, and the driving motor 4 works to drive the rotating threaded rod 5 to rotate. The rotation of the rotating threaded rod 5 will drive the sliding block 91 to slide from one side to the other side, thereby completing the measurement of the deformation of the protective device after the dynamic impact test.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle lower protection device strength testing platform, comprising a base (1), two groups of fixing pins (2) are rotatably mounted on the upper surface of the base (1), a fixing plate (3) is sleeved in the middle of each group of fixing pins (2), a driving motor (4) is fixedly mounted on the right side of the bottom of the base (1), and the characteristics are: The output end of the driving motor (4) is fixedly connected to a rotating threaded rod (5); the left and right sides of the base (1) are fixedly connected to L plates (6); the upper surface of the L plates (6) is fixedly connected to an elastic pad (7); a sliding rod (8) is fixedly connected between the two L plates (6); the middle part of the sliding rod (8) is slidably connected to a detection mechanism (9); the upper surface of the base (1) is fixedly connected to a connecting column (10); the upper surface of the connecting column (10) is fixedly mounted with a control motor (11); the output shaft of the control motor (11) is fixedly connected to a cable reel (12); the cable reel (12) is provided with a cable (11) inside. 3), the bottom end of the cable (13) is fixedly connected to a clamping mechanism (14), a rectangular rod (15) is installed in the middle of the clamping mechanism (14), the lower surface of the rectangular rod (15) is fixedly connected to two fixed threaded rods (16), the middle of the fixed threaded rod (16) is threadedly connected to a fixed sleeve (17), the bottom ends of the two fixed threaded rods (16) are fixedly connected to a load-bearing plate (18), a plurality of counterweights (19) are installed above the load-bearing plate (18), and two connecting shafts (20) are fixedly connected to the right side of the connecting column (10), and a guide wheel (21) is rotatably installed in the middle of the connecting shaft (20).

2. The vehicle underbody protection device strength testing platform according to claim 1, characterized in that: The detection mechanism (9) comprises a sliding block (91), a processor (92) is fixedly mounted on the upper surface of the sliding block (91), a plurality of gas shells (93) are fixedly mounted on the upper surface of the processor (92), a pressure sensor (94) is fixedly mounted on the bottom of the gas shell (93), a sliding column (95) is slidably connected to the top of the gas shell (93), a rotating ball (96) is movably mounted on the top of the sliding column (95), and a sealing gasket (97) is fixedly connected to the lower end of the sliding column (95).

3. The vehicle underbody protection device strength testing platform according to claim 2, characterized in that: The clamping mechanism (14) comprises a clamping head (141), wherein two rotating chambers (142) are provided inside the clamping head (141), a fixed column (143) is fixedly connected to the middle of the rotating chamber (142), a rotating plate (144) is rotatably mounted to the middle of the fixed column (143), a plurality of curved springs (145) are fixedly mounted on the lower surface of the rotating plate (144), a limit block (146) is arranged on the outer side of the rotating plate (144), a magnetic block (147) is fixedly connected to the outer end of the limit block (146), a plurality of extrusion springs (148) are fixedly connected to the outer side of the magnetic block (147), and an electromagnetic sleeve (149) is arranged on the middle of the rotating plate (144).

4. The vehicle underbody protection device strength testing platform according to claim 3, characterized in that: The rotating threaded rods (5) are rotatably connected to the two L-plates (6), the inner ends of the cables (13) are fixedly mounted to the middle of the cable reel (12), and the two guide wheels (21) are in contact with the cables (13).

5. The vehicle underbody protection device strength testing platform according to claim 4, characterized in that: The sliding block (91) is threadedly connected to the rotating threaded rod (5), the sealing gasket (97) is adapted to the inner wall of the gas shell (93), and the plurality of gas shells (93) are divided into two groups, with one group of gas shells (93) being located in the spacing between the other group of gas shells (93).

6. The vehicle underbody protection device strength testing platform according to claim 5, characterized in that: The two rotating chambers (142) are symmetrically opened, the lower ends of the plurality of curved springs (145) are fixedly connected to the chuck (141), the electromagnetic sleeve (149) is fixedly connected to the chuck (141), and the limit block (146) is slidably connected to the chuck (141).

7. The vehicle underbody protection device strength testing platform according to claim 6, characterized in that: The gas shell (93) is filled with gas, and a groove is formed on the upper surface of the outer end of the rotating plate (144).

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