Detection device for automobile shock absorber production

Abstract

The invention relates to the field of shock absorber detection, in particular to a detection device for automobile shock absorber production. Comprising a test bench, a driving motor and a continuously variable transmission are fixedly installed on the test bench, a first delivery wheel and a test roller which are symmetrically distributed are installed on the test bench, the output end of the continuously variable transmission is in transmission connection with the first delivery wheel and a second delivery wheel through a belt, and a limiting shell is fixedly connected to the test bench. The limiting shell is slidably connected with a first limiting block and a limiting piston rod, and an oil hydraulic cylinder is fixedly connected to the side, close to the driving motor, of the testing table. The transmission ratio of the continuously variable transmission is changed through cooperation of the first limiting block, the limiting piston rod and the oil hydraulic cylinder, when the piston rod makes contact with the first limiting block, the delivery speed of the piston rod is correspondingly decreased, and when the piston rod does not make contact with the first limiting block, the delivery speed of the piston rod is correspondingly increased; the connection efficiency of the detection process of the two piston rods is improved.

Description

Technical Field

[0001] The invention relates to the field of shock absorber detection, and in particular to a detection device for automobile shock absorber production. Background Art

[0002] Automobile shock absorbers are important structures that reduce vibrations and bumps during vehicle driving and provide smooth ride comfort and handling performance. They are usually composed of a buffer cylinder, a piston rod, a piston, a spring and a damping material. In the process of producing automobile shock absorbers, the straightness detection of the piston rod is an important part of ensuring the production quality of the shock absorber. Currently, the surface defects and length of the piston rod are mostly detected by appearance inspection instruments and high-precision measuring instruments. However, in the process of inspecting the piston rods one by one in the existing inspection device, the feed speed of the piston rod is uniform, and because the piston rod is not fed compactly, a lot of inspection time is wasted in the process of connecting the two piston rods, which slows down the overall inspection efficiency of the piston rod. After the defective piston rod is screened out, there will be a blank distance between the subsequent piston rod and the inspection device. The feeding time of the piston rod in this process is wasted, which is not conducive to improving the overall inspection efficiency.

[0003] Therefore, it is necessary to design a detection device for the production of feed speed regulating automobile shock absorbers in view of the shortcomings of the prior art. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned background technology, the present invention provides a feed speed adjustable automobile shock absorber production detection device.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a detection device for automobile shock absorber production, comprising a test bench, a drive motor and a continuously variable transmission are fixedly installed on the test bench, the output shaft of the drive motor is fixedly connected to the input end of the continuously variable transmission, a symmetrically distributed first delivery wheel and a test roller are installed on the test bench, a telescopic drive member is fixedly installed on the upper side of the test bench, the telescopic end of the telescopic drive member is fixedly connected to an extrusion frame, the lower side of the extrusion frame is rotatably connected to an extrusion roller, a second delivery wheel is installed on the test bench, the output end of the continuously variable transmission is fixedly connected to the The first delivery wheel and the second delivery wheel are connected by belt transmission, a limit shell located below the test roller is fixedly connected to the test bench, a first limit block and a limit piston rod are slidably connected to the limit shell, the first limit block and the limit piston rod are limitedly matched and both are fixedly connected to the limit shell with a spring, a hydraulic cylinder is fixedly connected to the test bench, the limit piston rod penetrates the hydraulic cylinder and is sealed and slidably connected, a detector for detecting the straightness of the piston rod is arranged in the middle of the test bench, and a delayed delivery mechanism for delaying the rotation speed of the first delivery wheel is arranged on one side of the test bench.

[0006] Further description, the delayed delivery mechanism includes a mounting shell, the mounting shell is slidably connected to the upper side of the test bench, a reset tension spring is fixedly connected between the mounting shell and the test bench, a baffle rod is fixedly connected to the side of the mounting shell away from the first delivery wheel, one end of the baffle rod is rotatably connected to a second limit block, the horizontal height of the second limit block is located between the test roller and the extrusion roller, the side of the baffle rod away from the first delivery wheel is slidably connected to a limit slider, the second limit block is limitedly matched with the limit slider, and the baffle rod is fixedly connected to the limit slider. A reset spring is fixedly connected therebetween, a reset block is fixedly connected to the side of the test bench away from the first delivery wheel, the reset block is limitedly matched with the limit slider, a flexible support pad is fixedly connected to the side of the mounting shell away from the detector, a row of positioning and limiting components are arranged in the mounting shell, the positioning and limiting components are used to locate the defective position of the piston rod, an electrically-controlled hydraulic telescopic part is fixedly connected to the side of the test bench away from the drive motor, the electrically-controlled hydraulic telescopic part is connected to the oil hydraulic cylinder, and the electrically-controlled telescopic end of the electrically-controlled hydraulic telescopic part contacts and cooperates with the flexible support pad.

[0007] The two ends of the two-way limit block are respectively matched with the adjacent two limit push rods and the ratchet bar for limiting the position of the two-way limit block, and a spring is fixedly connected between the two-way limit block and the ratchet bar for limiting the position of the two-way limit block.

[0008] Further description, the ratchet bar is provided with two rows of mirror-distributed ratchets, the recursive frame is provided with staggered wedge blocks, and the vertical spacing of the staggered wedge blocks on the recursive frame is equal to the maximum distance between the vertical ends of the two rows of ratchet teeth.

[0009] Further description, it also includes a cleaning mechanism, which is arranged on a side of the test bench away from the first delivery wheel. The cleaning mechanism includes a fixed shell, which is arranged on a side of the test bench away from the first delivery wheel. A cleaning chamber is arranged in the middle of the fixed shell, and the fixed shell is fixedly connected to a cleaning nozzle distributed circumferentially in the cleaning chamber. A gas chamber is arranged on one side of the fixed shell close to the test bench, and a scraping assembly is arranged in the gas chamber. The scraping assembly is used to clean impurities on the surface of the shock absorber piston rod, and the gas chamber is connected to the cleaning chamber. A third delivery wheel is rotatably installed on the side of the fixed shell away from the test bench, and the third delivery wheel is connected to the first delivery wheel by a belt drive.

[0010] Further description, the scraping assembly includes an electric cleaning cylinder, which is rotatably connected in the fixed shell, a sliding ring is slidably connected in the fixed shell, and the inner ring of the sliding ring is fixedly connected with arc scrapers distributed equidistantly in the circumference, and the arc scrapers distributed equidistantly in the circumference are commonly fixed with a swivel, and the swivel is slidably matched with the fixed shell.

[0011] It is further explained that the cleaning chamber is composed of two cavities with different diameters. The gas chamber is connected to the cleaning chamber of small diameter through axially equidistantly distributed air holes. The air holes close to the electric cleaning cylinder are perpendicular to the central axis of the cleaning chamber, and an inclined angle is set between the air holes on the side away from the electric cleaning cylinder and the central axis of the cleaning chamber.

[0012] Further description, it also includes a limiting slide, which is slidably connected to the upper part of the fixed shell, one end of the limiting slide is fixedly connected with a fixing sleeve, the fixing sleeve is rotatably connected to the swivel, both sides of the fixed shell are slidably connected with L-shaped limiting blocks, the L-shaped limiting blocks are limited and slidably matched with the limiting slide, a fixing ring is fixedly connected to the side of the swivel close to the electric cleaning cylinder, the fixing ring is slidably connected with elastic limiting blocks equidistantly distributed circumferentially, the inner ring of the electric cleaning cylinder close to the swivel is provided with limiting grooves equidistantly distributed circumferentially, and the elastic limiting blocks equidistantly distributed circumferentially are respectively limited and matched with the corresponding limiting grooves.

[0013] It is further explained that the end of the first limit block located between the symmetrically distributed test rollers is connected to a ball, and the end of the second limit block away from the baffle rod and the lower end of the L-shaped limit block are both rotatably mounted with rollers.

[0014] Further description, a water trough is provided at the bottom of the small diameter cleaning chamber, the bottom of the water trough is set as an inclined surface, the fixed shell is provided with a sewage outlet at the lowest point of the water trough, and the fixed shell is fixedly connected with a collection box at the lower end of the sewage outlet.

[0015] Compared with the prior art, the present invention has the following advantages: the present invention changes the transmission ratio of the continuously variable transmission by cooperating with the first limit block, the limit piston rod and the hydraulic cylinder. When the piston rod contacts the first limit block, the delivery speed of the piston rod is correspondingly reduced, and when the piston rod does not contact the first limit block, the delivery speed of the piston rod is correspondingly increased, thereby improving the connection efficiency of the two piston rod detection processes; the defect position corresponding to the piston rod is determined by the positioning limit assembly, and in the subsequent several continuous piston rod detection processes, the corresponding position of the defect is detected in more detail to minimize the impact on the detection efficiency, and at the same time, the defect of the piston rod is strengthened to achieve more efficient and more accurate detection; the surface oil stains of the piston rod are cleaned by the cleaning mechanism, and in conjunction with the movable arc scraper, in the process of cleaning the piston rod, the arc scraper first scrapes off the cleaning water and then dries it. After the piston rod is cleaned, in the process of connecting the two piston rods, the arc scraper is cleaned by airflow to prevent the accumulation of oil stains on the arc scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the parts related to the detection of the piston rod of the present invention;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the parts related to adjusting the piston rod feed speed of the present invention;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the delayed delivery mechanism of the present invention;

[0021] Figure 6 It is a partial three-dimensional structural schematic diagram of the delayed delivery mechanism of the present invention;

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the positioning and limiting assembly of the present invention;

[0023] Figure 8 It is a three-dimensional structural cross-sectional view of the cleaning mechanism of the present invention;

[0024] Fig. 9 It is a three-dimensional structural cross-sectional view of the internal structure of the fixed shell of the present invention;

[0025] Fig.10 It is a three-dimensional structural exploded view of the scraping component of the present invention.

[0026] Figure numerals: 1-test bench, 2-drive motor, 3-continuously variable transmission, 4-first delivery wheel, 5-test roller, 6-telescopic drive member, 7-extrusion frame, 8-extrusion roller, 9-second delivery wheel, 10-limiting shell, 11-first limiting block, 12-limiting piston rod, 13-hydraulic cylinder, 14-detector, 15-manipulator, 16-feeding member, 21-installation shell, 22-reset tension spring, 23-block rod, 24-second limiting block, 25-limiting slider, 26-reset spring, 27-reset block, 28-flexible support pad, 29-electric Control hydraulic telescopic parts, 31-limit push rod, 32-bidirectional limit block, 33-ratchet bar, 34-third limit block, 35-repeating frame, 36-reset rod, 41-fixed shell, 42-cleaning chamber, 43-cleaning nozzle, 44-electric cleaning cylinder, 45-sliding collar, 46-arc scraper, 47-swivel ring, 48-gas chamber, 49-third delivery wheel, 51-limit slide, 52-fixed sleeve, 53-L-shaped limit block, 54-fixed ring, 55-elastic limit block, 56-limit groove, 61-water tank, 62-drainage outlet, 63-collection box. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0028] Embodiment 1: A detection device for automobile shock absorber production, combined with Figure 1-Figure 4As shown, a test bench 1 is included, on which a driving motor 2 and a continuously variable transmission 3 are fixedly mounted, the continuously variable transmission 3 is a hydraulically controlled transmission, the output shaft of the driving motor 2 is fixedly connected to the input end of the continuously variable transmission 3, the test bench 1 is installed with a symmetrically distributed first delivery wheel 4 and a test roller 5, the test roller 5 is an electric roller with a uniform rotation speed, the first delivery wheel 4 is used for the transfer and transportation of piston rod feeding and detection, a telescopic driving member 6 is fixedly mounted on the upper side of the test bench 1, the telescopic end of the telescopic driving member 6 is fixedly connected to an extrusion frame 7, the lower side of the extrusion frame 7 is rotatably connected to an extrusion roller 8, and the extrusion roller 8 is connected to the test The test roller 5 cooperates to form a rotation space for the piston rod, and the piston rod is more stable when rotating on the test roller 5 by squeezing the roller 8. A second delivery wheel 9 is installed on the test bench 1. The second delivery wheel 9 is used for piston rod detection and material delivery and transportation. The output end of the continuously variable transmission 3 is connected to the first delivery wheel 4 and the second delivery wheel 9 through a belt drive. The continuously variable transmission 3 is used to change the output speed of the drive motor 2 and transmit it to the first delivery wheel 4 and the second delivery wheel 9. A limit shell 10 is fixed on the test bench 1. The limit shell 10 is located below the test roller 5. The limit shell 10 is slidably connected with the first limit The first limit block 11 is an L-shaped block, and its lower end is provided with an inclined surface. The left end of the limit piston rod 12 is provided with an inclined surface that cooperates with the first limit block 11. The right end of the limit piston rod 12 is a piston end. The first limit block 11 and the limit piston rod 12 are fixedly connected to the limit shell 10 with a spring for self-reset. The end ball of the first limit block 11 located between the symmetrically distributed test rollers 5 is connected with a ball, and the friction between the first limit block 11 and the piston rod is reduced by the ball. A hydraulic cylinder 13 is fixedly connected to the side of the test bench 1 close to the drive motor 2. The piston rod 12 and the hydraulic cylinder 13 are penetrated and sealed and slidably connected. The right cavity formed by the piston end of the limiting piston rod 12 and the hydraulic cylinder 13 is filled with hydraulic oil. A detector 14 for detecting the straightness of the piston rod is arranged in the middle of the test bench 1. The detector 14 is electrically connected to the telescopic drive member 6. A manipulator 15 is arranged on the side of the test bench 1 away from the detector 14. The manipulator 15 is used to grab the piston rod. A delayed delivery mechanism for delaying the rotation speed of the first delivery wheel 4 is arranged on the side of the test bench 1 away from the manipulator 15. A loading member 16 for feeding material to the first delivery wheel 4 is arranged on one side of the test bench 1.

[0029] When the straightness of the produced automobile shock absorber piston rod (hereinafter referred to as "piston rod") is detected by the device, the drive motor 2 and the test roller 5 are started. In the initial state, the telescopic drive member 6 is in the extended state. The distance between the extrusion roller 8 and the test roller 5 is just enough to place a piston rod. The loading member 16 delivers the piston rod to the first delivery wheels 4 in sequence. The drive motor 2 drives a pair of first delivery wheels 4 to rotate through the continuously variable transmission 3. The continuously variable transmission 3 is a hydraulically triggered continuously variable transmission 3. The two pairs of first delivery wheels 4 clamp and deliver the piston rod to the left. The piston rod moves to the left between the test roller 5 and the extrusion roller 8. The test roller 5 drives the piston rod to rotate at a uniform speed. When the piston rod moves to contact the ball at the upper end of the first limit block 11, the left end of the piston rod moves to the detector 14, and the piston rod squeezes the first limit block 11 to move downward, and the right end of the first limit block 11 pushes the limit piston rod 12 to move to the right The piston at the right end of the limit piston rod 12 squeezes the hydraulic oil in the oil cylinder 13 into the continuously variable transmission 3, and the transmission ratio between the active pulley and the passive pulley of the continuously variable transmission 3 becomes smaller, so the passive pulley drives the first delivery wheel 4 to slow down. The detector 14 is a laser detector 14, and the detector 14 detects the straightness of the rotating piston rod surface. The first delivery wheel 4 delivers the piston rod to the left, so that the surface of the piston rod is evenly detected along the spiral line by the detector 14. When a defect in the piston rod is detected, the detector 14 controls the telescopic drive member 6 to retract, and the extrusion frame 7 and the extrusion roller 8 move upward away from the piston rod being detected, and the defective piston rod is removed by the manipulator 15. Then the detector 14 controls the telescopic end of the telescopic drive member 6 to reset, and the next piston rod repeats the above-mentioned movement detection process. When the device is no longer needed to detect the piston rod, the drive motor 2, the test roller 5 and the second delivery wheel 9 can be turned off.

[0030] When the straightness detection of the piston rod surface is performed, the surface straightness detection of the piston rod needs to set the spiral line density of the piston rod outer surface detection. Too low spiral line density will lead to insufficient comprehensiveness of the detection. Although the spiral line density is too high, the detection efficiency is too low. Therefore, it is necessary to detect the appropriate spiral density. During the connection process of the detection of two piston rods and after the defective piston rod is removed, the left end of the next piston rod will remain a distance from the detector 14. At this time, the first limit block 11 loses the extrusion of the piston rod, and the first limit block 11 is pushed upward under the action of the spring. , the limit piston rod 12 moves to the left under the action of the spring, the internal pressure of the oil hydraulic cylinder 13 is reduced, the hydraulic oil in the continuously variable transmission 3 is pumped out, the transmission ratio between the active pulley and the passive pulley of the continuously variable transmission 3 becomes larger, and the passive pulley drives the first delivery wheel 4 to increase the speed. Therefore, the speed of the next piston rod to the left is accelerated until the left end of the next piston rod moves to the left to the detector 14 and squeezes the first limit block 11. The speed of the first delivery wheel 4 will slow down, thereby accelerating the process of piston rod connection while ensuring effective detection of the piston rod, thereby achieving the purpose of accelerating the overall detection efficiency.

[0031] Embodiment 2: Based on Embodiment 1, Figure 1-Figure 4 As shown, the delayed delivery mechanism includes a mounting shell 21 slidably connected to the upper side of the test bench 1, a reset spring 22 is fixedly connected between the mounting shell 21 and the test bench 1, the reset spring 22 is used to drive the mounting shell 21 to move rightward and reset, a blocking rod 23 is fixedly connected to the left side of the mounting shell 21, when the reset spring 22 is in the natural state, the blocking rod 23 is located close to the left side of the detector 14, one end of the blocking rod 23 is rotatably connected to a second limit block 24, the second limit block 24 is used to cooperate with the limiting movement of the piston rod, the front end of the second limit block 24 is rotatably installed with a roller, the second limit block 24 reduces the friction between the second limit block 24 and the piston rod through the roller, the purpose is to protect the piston rod, the horizontal height of the second limit block 24 is located between the test roller 5 and the extrusion roller 8, so during the movement of the piston rod, the piston rod will drive the second limit block 24 The positioning block 24 moves synchronously, and the left side of the blocking rod 23 is slidably connected to a limiting slider 25 for limiting the rotation of the second limiting block 24. A reset spring 26 is fixed between the blocking rod 23 and the limiting slider 25. A reset block 27 is fixed to the left side of the test bench 1. The reset block 27 is a wedge-shaped block. The reset block 27 and the limiting slider 25 are limited and cooperated to push the limiting slider 25 to move backward to release the limitation of the second limiting block 24. A flexible support pad 28 is fixed to the rear side of the mounting shell 21. A row of positioning and limiting components are arranged in the mounting shell 21. The positioning and limiting components are used to locate the defective position of the piston rod. An electrically-controlled hydraulic telescopic component 29 is fixed to the rear side of the test bench 1. The electrically-controlled telescopic end of the electrically-controlled hydraulic telescopic component 29 is connected to the oil hydraulic cylinder 13, and the electrically-controlled hydraulic telescopic component 29 is in contact with the flexible support pad 28.

[0032] Combination Figure 1-Figure 4 As shown, the positioning and limiting assembly includes a limiting push rod 31 slidably connected to the mounting shell 21, and a bidirectional limiting block 32 and a ratchet bar 33 are slidably connected in the mounting shell 21. The bidirectional limiting block 32 is an L-shaped block, and the bidirectional limiting block 32 is provided with two wedge-shaped ends. The two wedge-shaped ends of the bidirectional limiting block 32 are respectively limited and matched with the adjacent limiting push rod 31 and the ratchet bar 33. The ratchet bar 33 pushes the bidirectional limiting block 32 to move, and at the same time, the bidirectional limiting block 32 pushes the limiting push rod 3 1 extends backward, a spring for resetting the ratchet bar 33 is fixedly connected between the ratchet bar 33 and the mounting shell 21, the test bench 1 is slidably connected with a third limit block 34 located above the detector 14, a spring is fixedly connected between the test bench 1 and the third limit block 34, the extrusion frame 7 is limitedly matched with the third limit block 34, the upward movement of the extrusion frame 7 will trigger the third limit block 34 to move backward, the third limit block 34 contacts and cooperates with the ratchet bar 33, and the third limit block 34 pushes the different positions The ratchet bar 33 is used to mark the defective position of the piston rod. A recursive frame 35 that is slidingly connected with the ratchet bar 33 and slidingly matched with the ratchet bar 33 is slidably connected in the mounting shell 21. The recursive frame 35 is used to limit the ratchet bar 33 to be gradually reset. A spring is fixedly connected between the recursive frame 35 and the mounting shell 21. A triangular block is fixedly connected to the lower side of the recursive frame 35. The ratchet bar 33 is provided with two rows of ratchets that are mirror-imaged up and down. The recursive frame 35 is provided with staggered wedge blocks. The staggered wedge blocks on the recursive frame 35 are vertically The spacing in the vertical direction is equal to the maximum distance between the vertical ends of the two rows of ratchets, so that the recursive frame 35 is always limited by the ratchet on the upper or lower side of the ratchet bar 33 when moving. A reset rod 36 located below the third limit block 34 is fixedly connected to the test bench 1, and a triangular block is also fixedly connected to the lower side of the reset rod 36. The reset rod 36 and the triangular block of the recursive frame 35 are limited by each other, and are used to push the recursive frame 35 to move downward each time the recursive frame 35 passes the reset rod 36.

[0033] Since piston rods are produced in batches, in order to avoid missing detection, after a piston rod is found to have a problem, further and more detailed detection is performed on the corresponding defective positions of subsequent piston rods in the same batch. If the corresponding defective positions of the piston rods have no defects continuously, it proves that the piston rods with straightness defects are individual cases. If defects occur continuously, it proves that there are problems in the processing of the piston rods. To achieve the above function, the delayed delivery mechanism is required to cooperate with the feeding of the piston rod. The specific process is as follows:

[0034] First, in the initial state, the reset tension spring 22 is in a natural state. At this time, the stop rod 23 is located on the left side of the detector 14. After the left end of the piston rod is detected by the detector 14, it will contact the second limit block 24. The piston rod pushes the second limit block 24 to move leftward. The second limit block 24 drives the stop rod 23 and the mounting shell 21 to move leftward. The reset tension spring 22 is stretched. When the detector 14 detects a defect in the piston rod, the extrusion frame 7 moves upward to squeeze the third limit block 34. The third limit block 34 moves to The ratchet bar 33 moves backward and pushes the ratchet bar 33 to move backward. The spring between the ratchet bar 33 and the mounting shell 21 will be compressed, and the recursive frame 35 limits the ratchet bar 33 so that the ratchet bar 33 remains in a state of being pushed backward. The position of the squeezed ratchet bar 33 corresponds to the defective position of the piston rod. The ratchet bar 33 moves backward and pushes the two-way limit block 32 to move a certain distance to the right. The two-way limit block 32 pushes the limit push rod 31 backward for a certain distance, and the limit push rod 31 pushes the flexible support pad 28 out to arch.

[0035] After the piston rod is found to be defective, the detector 14 controls the telescopic drive member 6 to retract, the manipulator 15 takes the piston rod away, and then the second limit block 24 loses the push of the piston rod. Under the action of the reset spring 22, the mounting shell 21 moves to the right and resets. After the next piston rod contacts the second limit block 24, the above-mentioned detection process will be repeated. When the mounting shell 21 moves to the left to the protrusion of the flexible support pad 28 and contacts the electric-controlled hydraulic telescopic member 29, the position of the piston rod being detected here corresponds to the defective position of the defective piston rod. At this time, the electric-controlled hydraulic telescopic member 29 starts to squeeze the hydraulic oil to the oil In the pressure cylinder 13, the pressure in the oil hydraulic cylinder 13 is further increased, pushing the continuously variable transmission 3 to reduce the transmission ratio between the active pulley and the passive pulley, so as to achieve the purpose of reducing the speed of the piston rod delivered by the first delivery wheel 4, increase the density of the detection spiral lines on the surface of the piston rod, and perform more careful inspections on the corresponding defective positions of the subsequent piston rods. After the protrusion of the flexible support pad 28 is out of contact with the electronically controlled hydraulic telescopic component 29, the electronically controlled hydraulic telescopic component 29 returns to its initial position, the pressure in the oil hydraulic cylinder 13 is restored, the continuously variable transmission 3 restores the transmission speed, and the piston rod is tested for normal speed.

[0036] If the piston rod passes the test smoothly, when the piston rod pushes the second limit block 24 to move to the left side of the test bench 1, the reset block 27 will contact the limit slider 25, and the reset block 27 will push the limit slider 25 to move backward. The limit slider 25 squeezes the reset spring 26, and the limit slider 25 loses its limiting effect on the second limit block 24. The second limit block 24 swings and loses the limit on the piston rod. The piston rod moves out of the test bench 1 driven by the second delivery wheel 9. At the same time, the second limit block 24 loses the push of the piston rod after swinging, and the mounting shell 21 moves to the right and resets under the action of the reset tension spring 22.

[0037] When the push rack 35 is in the process of reciprocating left and right movement of the mounting shell 21, the triangular blocks at the lower ends of a row of recursive racks 35 will successively contact the triangular blocks on the lower sides of the reset rod 36. After the two contact, the recursive rack 35 is pushed downward by the reset rod 36. After the two are out of contact, the recursive rack 35 will be pushed upward and reset by the spring between it and the mounting shell 21. In the process of completing an up and down reciprocating movement, when the recursive rack 35 moves downward, the wedge block in the middle of the recursive rack 35 will move until it loses the limit cooperation with the adjacent ratchet bar 33. At this time, the wedge block on the upper part of the recursive rack 35 is located between two adjacent ratchet teeth. The spring between the ratchet bar 33 and the mounting shell 21 pushes the ratchet bar 33 to move forward a distance until the wedge block on the upper part of the recursive rack 35 fits with the ratchet tooth adjacent to the rear side. Similarly, when the recursive rack 35 moves upward, the ratchet bar 33 will also move forward a distance. The total distance moved on both sides is equal to the length of one ratchet tooth. When the ratchet bar 33 moves forward successively During the forward movement, since the ratchet bar 33 always limits the two-way limit block 32 (the right side of the ratchet bar 33 is always in contact with the two-way limit block 32), the relative positions of the limit push rod 31 and the two-way limit block 32 remain unchanged until the ratchet bar 33 is reset (the right side of the ratchet bar 33 loses contact with the two-way limit block 32), the limit push rod 31 and the two-way limit block 32 are also reset at the same time. Therefore, the piston rods behind the defective piston rod will be more carefully inspected at the corresponding defective positions. If no defects are detected in the subsequent piston rods, it will also prove that the defects of the piston rods are individual phenomena. After several piston rods have been tested, the ratchet bar 33 is reset and the subsequent piston rods continue to be tested at normal speed, which does not affect the detection efficiency. If the subsequent piston rods continue to be detected with problems at the same position, it proves that there is a major problem in the production process of the piston rod, and the device needs to be shut down, and the problems in the production process of the piston rod need to be solved in time.

[0038] Embodiment 3: Based on Embodiment 2, Figure 1 , Figure 2 and Figure 8-Figure 10As shown, it also includes a cleaning mechanism for cleaning oil sludge and impurities on the surface of the piston rod. The cleaning mechanism is arranged between the test bench 1 and the feeding piece 16, and is used to clean the piston rod before testing it. The cleaning mechanism includes a fixed shell 41, and a cleaning chamber 42 is arranged in the middle of the fixed shell 41. The cleaning chamber 42 consists of two chambers with different diameters, wherein the large-diameter chamber on the right is a liquid cleaning chamber, and the small-diameter chamber on the left is an impurity residue cleaning and drying chamber. The fixed shell 41 is fixedly connected with a cleaning nozzle 43 distributed circumferentially in the cleaning chamber 42. The cleaning nozzle 43 sprays a cleaning liquid to rinse and soften the impurities on the surface of the piston rod. A gas chamber 4 is arranged on one side of the fixed shell 41 close to the test bench 1. 8. The gas chamber 48 is connected with the small-diameter cleaning chamber 42 through axially equidistantly distributed air holes. Hot air for drying is transported to the small-diameter cavity on the left through the gas chamber 48. The air holes on the right are perpendicular to the central axis of the cleaning chamber 42. An inclined angle is set between the air holes on the left and the central axis of the cleaning chamber 42, so that the airflow in the cleaning chamber 42 tends to move rightward to prevent the cleaning liquid from leaking from the left side of the cleaning chamber 42. A scraping assembly is set in the gas chamber 48. The scraping assembly is used to clean impurities on the surface of the shock absorber piston rod. The gas chamber 48 is connected with the cleaning chamber 42. A third delivery wheel 49 is rotatably installed on the right side of the fixed shell 41. The third delivery wheel 49 is connected to the first delivery wheel 4 through a belt drive.

[0039] Combination Figure 8-Figure 10 As shown, the scraping assembly includes an electric cleaning cylinder 44, the inner wall of which is a uniformly distributed brush for cleaning stubborn impurities on the piston rod, the electric cleaning cylinder 44 is rotatably connected to the fixed shell 41, the fixed shell 41 is slidably connected with a sliding ring 45, the sliding ring 45 is formed by two layers of rings, the inner ring of the sliding ring 45 is fixedly connected with arc scrapers 46 distributed equidistantly in the circumference, the arc scrapers 46 distributed equidistantly in the circumference fully cover the surface of the piston rod, and the gaps between the arc scrapers 46 reduce the retention of impurities and cleaning fluid, the arc scrapers 46 distributed equidistantly in the circumference are commonly fixedly connected with a swivel 47, the swivel 47 is used to stabilize the arc scrapers 46 to scrape impurities, and the swivel 47 is slidably matched with the fixed shell 41.

[0040] Combination Figure 8 and Fig. 9As shown, it also includes a limited slide 51, which is slidably connected to the upper part of the fixed shell 41. The limited slide 51 has three ends. One end of the limited slide 51 located inside the fixed shell 41 is fixedly connected to a fixed sleeve 52, and the fixed sleeve 52 is rotatably connected to the swivel 47. The left and right sides of the fixed shell 41 are respectively slidably connected to L-shaped limit blocks 53. The L-shaped limit block 53 is provided with an inclined surface with the same inclined direction. The end of the limited slide 51 located outside the fixed shell 41 is connected to the inclined surface of the L-shaped limit block 53, and the lower end of the L-shaped limit block 53 is rotatably installed There is a roller, and the L-shaped limit block 53 reduces the friction between the piston rod and the roller. The L-shaped limit block 53 is slidably matched with the limit slide 51. A fixed ring 54 is fixed to the right side of the swivel 47. The outer circumferential side of the fixed ring 54 is slidably connected with three elastic limit blocks 55 distributed equidistantly in the circumference. The left inner ring of the electric cleaning cylinder 44 is provided with three limit grooves 56 distributed equidistantly in the circumference. The three elastic limit blocks 55 are respectively matched with the three corresponding limit grooves 56 to achieve the rotation effect of the swivel 47 driven by the electric cleaning cylinder 44 when the two cooperate.

[0041] Combination Fig. 9 As shown, a water tank 61 is provided at the bottom of the small diameter cleaning chamber 42, and the bottom of the water tank 61 is set as an inclined surface. The fixed shell 41 is provided with a sewage outlet 62 at the lowest point of the water tank 61, and the fixed shell 41 is fixedly connected to a collection box 63 at the lower end of the sewage outlet 62.

[0042] Before the piston rod is tested, some oily sludge impurities will inevitably adhere to its surface during the production process. The impurities on the surface of the piston rod will affect the detection and determination of its surface straightness. Therefore, in the process of the piston rod being transferred from the loading piece 16 to the first delivery wheel 4, the outer surface of the piston rod is cleaned. When the device starts testing, the motor driving the electric cleaning cylinder 44 is started. The electric cleaning cylinder 44 is driven by the motor through the belt to rotate. The left end of the piston rod first enters the fixed housing 41 through the delivery of the third delivery wheel 49. The piston rod will push the L-shaped limit block 53 to Pushing up, the inclined surface on the upper side of the L-shaped limit block 53 pushes the limit slide 51 to move to the right, and the limit slide 51 will drive the swivel 47 to move to the right through the fixed sleeve 52, and the swivel 47 will drive the sliding sleeve ring 45, the arc scraper 46, the fixed ring 54 and the elastic limit block 55 to move, and the fixed ring 54 moves to fit with the electric cleaning cylinder 44, and the elastic limit block 55 is embedded in the corresponding limit groove 56. Therefore, the rotating electric cleaning cylinder 44 will be limited by the elastic limit block 55 and the limit groove 56, driving the fixed ring 54, the arc scraper 46 and the swivel 47 to rotate synchronously.

[0043] After the piston rod moves to the left and enters the fixed housing 41, the piston rod is first cleaned by the cleaning liquid sprayed from the cleaning nozzle 43 to remove most of the impurities that are loosely adhered to its outer surface, and then the electric cleaning cylinder 44 is used to rotate and scrub to clean the impurities that are tightly adhered to the outer surface of the piston rod, and then the impurities on the outer surface of the piston rod are scraped by the rotating arc scraper 46 to remove the impurities and cleaning liquid remaining on the surface of the piston rod, and finally the gas sprayed from the gas chamber 48 is used to dry the surface of the piston rod. The above process realizes continuous cleaning of the piston rod, and after the piston rod is completely moved out of the fixed housing 41, the right end of the piston rod loses contact with the L-shaped limit block 53 on the left, and the limit slide 51 is in contact with the fixed housing 41, the L-shaped limit block 53 is reset downward, and the limit slide 51 moves to the left and resets, the elastic limit block 55 and the limit groove 56 lose the limit cooperation, and the arc scraper 46 moves to the left to the inner area of ​​the gas chamber 48. After the cleaning is completed, the gas in the gas chamber 48 blows the arc scraper 46 through the air holes, and the gas cleans the impurities and cleaning water adhering to the arc scraper 46 to prevent the arc scraper 46 from adhering to too much oil and impurities. In the process of cleaning the piston rod by the arc scraper 46 and cleaning the arc scraper 46 by the gas, the excess oil and impurities and cleaning water flow to the drain port 62 through the water trough 61 inclined to the left on the bottom surface, and the scraped cleaning water and impurities are collected by the collection box 63.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A detection device for automobile shock absorber production, characterized in that: The invention comprises a test bench (1), on which a driving motor (2) and a continuously variable transmission (3) are fixedly mounted, the output shaft of the driving motor (2) is fixedly connected to the input end of the continuously variable transmission (3), the test bench (1) is mounted with symmetrically distributed first delivery wheels (4) and test rollers (5), a telescopic driving member (6) is fixedly mounted on the upper side of the test bench (1), the telescopic end of the telescopic driving member (6) is fixedly connected to an extrusion frame (7), the lower side of the extrusion frame (7) is rotatably connected to an extrusion roller (8), a second delivery wheel (9) is mounted on the test bench (1), and the output end of the continuously variable transmission (3) is connected to the first delivery wheel (4) and the second delivery wheel (9) via a belt drive. The test bench (1) is fixedly connected with a limit shell (10) located below the test roller (5); the limit shell (10) is slidably connected with a first limit block (11) and a limit piston rod (12); the first limit block (11) and the limit piston rod (12) are limitedly matched and a spring is fixedly connected between the first limit block (11) and the limit piston rod (12) and the limit shell (10); a hydraulic cylinder (13) is fixedly connected with the test bench (1); the limit piston rod (12) and the hydraulic cylinder (13) are penetrated and sealed and slidably connected; a detector (14) for detecting the straightness of the piston rod is arranged in the middle of the test bench (1); and a delayed delivery mechanism for delaying the rotation speed of the first delivery wheel (4) is arranged on one side of the test bench (1).

2. A detection device for automobile shock absorber production according to claim 1, characterized in that: The delayed delivery mechanism comprises a mounting shell (21), the mounting shell (21) is slidably connected to the upper side of the test bench (1), a reset tension spring (22) is fixedly connected between the mounting shell (21) and the test bench (1), a blocking rod (23) is fixedly connected to the side of the mounting shell (21) away from the first delivery wheel (4), one end of the blocking rod (23) is rotatably connected to a second limit block (24), the horizontal height of the second limit block (24) is located between the test roller (5) and the squeeze roller (8), the side of the blocking rod (23) away from the first delivery wheel (4) is slidably connected to a limit slider (25), the second limit block (24) and the limit slider (25) are limited in position, and the blocking rod (23) and the limit slider are fixedly connected to the first delivery wheel (4). A reset spring (26) is fixedly connected between the test bench (1) and the first delivery wheel (25); a reset block (27) is fixedly connected to the side of the test bench (1) away from the first delivery wheel (4); the reset block (27) is limitedly matched with the limit slider (25); a flexible support pad (28) is fixedly connected to the side of the mounting shell (21) away from the detector (14); a row of positioning and limiting components are arranged in the mounting shell (21); the positioning and limiting components are used to locate the defective position of the piston rod; an electric-controlled hydraulic telescopic component (29) is fixedly connected to the side of the test bench (1) away from the drive motor (2); the electric-controlled hydraulic telescopic component (29) is connected to the oil hydraulic cylinder (13); and the electric-controlled telescopic end of the electric-controlled hydraulic telescopic component (29) is in contact with the flexible support pad (28).

3. A detection device for automobile shock absorber production according to claim 2, characterized in that: The positioning and limiting assembly comprises a limiting push rod (31), the limiting push rod (31) is slidably connected to the mounting shell (21), a bidirectional limiting block (32) and a ratchet bar (33) are slidably connected in the mounting shell (21), the bidirectional limiting block (32) is provided with two wedge-shaped ends, the two wedge-shaped ends of the bidirectional limiting block (32) are respectively limitedly matched with the adjacent limiting push rod (31) and the ratchet bar (33), a spring is fixedly connected between the ratchet bar (33) and the mounting shell (21), the test bench (1) is slidably connected to a third limiting block (34) located above the detector (14) ), a spring is fixedly connected between the test bench (1) and the third limit block (34), the extrusion frame (7) is limitedly matched with the third limit block (34), the third limit block (34) is in contact with the ratchet bar (33), a recursive frame (35) is slidably connected in the mounting shell (21) and is limitedly matched with the ratchet bar (33), a spring is fixedly connected between the recursive frame (35) and the mounting shell (21), a reset rod (36) located below the third limit block (34) is fixedly connected to the test bench (1), and the reset rod (36) is limitedly matched with the recursive frame (35).

4. A detection device for automobile shock absorber production according to claim 3, characterized in that: The ratchet bar (33) is provided with two rows of mirror-image-distributed ratchets, and the recursive rack (35) is provided with staggered wedge blocks, and the vertical spacing of the staggered wedge blocks on the recursive rack (35) is equal to the maximum distance between the ends of the two rows of ratchet teeth in the vertical direction.

5. A detection device for automobile shock absorber production according to claim 3, characterized in that: The invention also comprises a cleaning mechanism, which is arranged on a side of the test bench (1) away from the first delivery wheel (4), and comprises a fixed shell (41), which is arranged on a side of the test bench (1) away from the first delivery wheel (4), a cleaning chamber (42) is arranged in the middle of the fixed shell (41), and a cleaning nozzle (43) is fixedly connected to the fixed shell (41) and is circumferentially distributed in the cleaning chamber (42), a gas chamber (48) is arranged on a side of the fixed shell (41) close to the test bench (1), and a scraping assembly is arranged in the gas chamber (48), and the scraping assembly is used to clean impurities on the surface of the shock absorber piston rod, and the gas chamber (48) is connected to the cleaning chamber (42), and a third delivery wheel (49) is rotatably mounted on a side of the fixed shell (41) away from the test bench (1), and the third delivery wheel (49) is connected to the first delivery wheel (44) through a belt transmission.

6. A testing device for automobile shock absorber production according to claim 5, characterized in that: The scraping assembly comprises an electric cleaning cylinder (44), the electric cleaning cylinder (44) is rotatably connected to the fixed shell (41), a sliding ring (45) is slidably connected to the fixed shell (41), the inner ring of the sliding ring (45) is fixedly connected to arc scrapers (46) distributed equidistantly in the circumference, the arc scrapers (46) distributed equidistantly in the circumference are commonly fixedly connected to a rotating ring (47), and the rotating ring (47) is slidably matched with the fixed shell (41).

7. A testing device for automobile shock absorber production according to claim 5, characterized in that: The cleaning chamber (42) is composed of two chambers with different diameters. The gas chamber (48) is connected to the cleaning chamber (42) with a smaller diameter through axially equidistantly distributed air holes. The air holes on the side close to the electric cleaning cylinder (44) are perpendicular to the central axis of the cleaning chamber (42), and an inclined angle is set between the air holes on the side away from the electric cleaning cylinder (44) and the central axis of the cleaning chamber (42).

8. A testing device for automobile shock absorber production according to claim 6, characterized in that: The invention also comprises a limit slide (51), wherein the limit slide (51) penetrates and is slidably connected to the upper part of the fixed shell (41), one end of the limit slide (51) is fixedly connected with a fixed sleeve (52), and the fixed sleeve (52) is rotatably connected to the rotating ring (47), and L-shaped limit blocks (53) are slidably connected to the two sides of the fixed shell (41), and the L-shaped limit blocks (53) are limited and slidably matched with the limit slide (51), and a fixed ring (54) is fixedly connected to the side of the rotating ring (47) close to the electric cleaning cylinder (44), and the fixed ring (54) is slidably connected with elastic limit blocks (55) equidistantly distributed in the circumferential direction, and the inner ring of the electric cleaning cylinder (44) close to the rotating ring (47) is provided with limit grooves (56) equidistantly distributed in the circumferential direction, and the elastic limit blocks (55) equidistantly distributed in the circumferential direction are respectively limited and matched with the corresponding limit grooves (56).

9. A testing device for automobile shock absorber production according to claim 8, characterized in that: The end of the first limit block (11) located between the symmetrically distributed test rollers (5) is spherically connected with a ball, and the end of the second limit block (24) away from the blocking rod (23) and the lower end of the L-shaped limit block (53) are both rotatably mounted with rollers.

10. A testing device for automobile shock absorber production according to claim 6, characterized in that: A water trough (61) is arranged at the bottom of the small-diameter cleaning chamber (42), the bottom of the water trough (61) is arranged as an inclined surface, the fixed shell (41) is provided with a sewage outlet (62) at the lowest point of the water trough (61), and the fixed shell (41) is fixedly connected with a collection box (63) at the lower end of the sewage outlet (62).

Images