A deformation detection device for integrated structural parts of rear longitudinal beam of automobile

Abstract

The invention relates to the technical field of deformation detection of rear longitudinal beams, and in particular to a deformation detection device for an integrated structural component of a rear longitudinal beam of an automobile; the device comprises a body and a chassis; the chassis is located at the upper end of the body; the invention realizes the measurement of the distance between the lower end surface of the rear longitudinal beam and a support platform according to the length of the detection rod and the elongation of the electric push rod through the cooperation between the detection rod and the electric push rod; and as the detection rod rolls along the lower end surface of the rear longitudinal beam, the pressure sensor compares the real-time sensed pressure with the standard value; not only the rising and falling distances of the detection rod are obtained to determine whether the lower end of the rear longitudinal beam is deformed; but also the lifting and lowering distances of the detection rod can be determined, and the specific position and deformation condition of the arc-shaped part of the rear longitudinal beam can be detected; thereby providing accurate analysis data for detection personnel to help analyze which link in the process has a production problem, thereby improving the production quality of the rear longitudinal beam.

Description

Technical Field

[0001] The invention relates to the technical field of rear longitudinal beam deformation detection, in particular to a deformation detection device for an integrated structural component of a rear longitudinal beam of an automobile. Background Art

[0002] The rear longitudinal beam of a car is an important part of the car body structure. It is usually located on both sides of the car body and together with several cross beams, it forms a side beam frame. This frame is a solid and rigid structure formed by connecting the longitudinal beams and cross beams together through riveting or welding. It can not only help share the torsional force and pressure during the driving process of the vehicle and maintain the stability of the vehicle body, but also when the car body is hit, the rear longitudinal beam can absorb and disperse the energy of the impact, thereby protecting the safety of the passengers in the car. It is one of the important components of vehicle safety.

[0003] The manufacturing process of the rear longitudinal beam involves forming, welding and other process steps. In the forming process, if the mold or forming equipment is used improperly or adjusted in place, the rear longitudinal beam will be deformed unevenly during the forming process, thereby affecting the dimensional accuracy and geometric shape of the rear longitudinal beam. In the welding process, the high temperature generated by welding will cause thermal expansion and thermal stress in the welding area and the surrounding materials. If the cooling rate during the welding process is uneven, it will cause deformation around the weld, and then cause local deformation or tensile deformation in the welding area. Therefore, deformation detection of the rear longitudinal beam of the automobile is one of the important measures to ensure vehicle safety, structural integrity and performance assurance.

[0004] Existing deformation detection of automobile rear longitudinal beams is mostly carried out by online detection of automobile longitudinal beam assemblies through inspection fixtures, rather than other detection systems, such as visual inspection systems. This is because the inspection fixtures are designed to accurately measure the shape changes of rear longitudinal beams of specific dimensions; they can provide high-precision measurement results, while visual inspection systems are not only more expensive, but also cannot achieve the same level of accuracy. In addition, visual inspection systems are easily affected by factors such as lighting, surface reflectivity, and shape complexity.

[0005] The existing rear longitudinal beam needs to be inspected to see if the middle bending part meets the design standards; however, the inspection fixture is usually manufactured according to the design specifications and dimensions of the rear longitudinal beam and can only determine whether it is deformed; if the bending part of the rear longitudinal beam is deformed, its size and shape will deviate from the design requirements, resulting in the inability to fully adapt to the inspection fixture; for example, changes in the geometric shape of the bending part will cause the inspection fixture to be unable to fit or fix with the rear longitudinal beam, making it impossible for the inspection fixture to determine the deformation position and deformation amount of the rear longitudinal beam;

[0006] In view of this, in order to overcome the above technical problems, the present invention proposes a deformation detection device for an integrated structural component of a rear longitudinal beam of an automobile, which solves the above technical problems. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art, the present invention proposes a deformation detection device for an integrated structural part of a rear longitudinal beam of an automobile. The present invention realizes the measurement of the distance between the lower end surface of the rear longitudinal beam and the support platform according to the length of the detection rod and the elongation of the electric push rod through the cooperation between the detection rod and the electric push rod; and as the detection rod rolls along the lower end surface of the rear longitudinal beam, the pressure sensor compares the real-time sensed pressure with the standard value; not only the rising and falling distances of the detection rod can be obtained to determine whether the lower end of the rear longitudinal beam is deformed; but also the lifting and lowering distances of the detection rod can be determined, and the specific position and deformation of the arc-shaped part of the rear longitudinal beam can be detected; thereby providing accurate analysis data for detection personnel to help analyze which link in the process has production problems, thereby improving the production quality of the rear longitudinal beam.

[0008] The technical solution adopted by the present invention to solve its technical problems is: a deformation detection device for an integrated structural part of a rear longitudinal beam of an automobile described in the present invention comprises a body and a chassis; the chassis is located at the upper end of the body; a support platform is fixedly installed on the upper end of the body; a clamping plate is arranged on the upper end of the support platform; the clamping plate and the support platform are connected by a hydraulic push rod; a positioning rod is fixedly connected to the upper end of the support platform; a positioning groove opposite to the positioning rod is provided on the surface of the clamping plate; a slide groove is provided on the upper end of the body; a screw rod is rotatably connected in the slide groove; a driving motor is installed inside the body; the driving motor is used to drive the screw rod to rotate; an electric push rod is slidably connected in the slide groove; the electric push rod is connected to the screw rod; a detection groove is provided on the upper end of the electric push rod; a detection rod is slidably and sealably connected in the detection groove; the detection groove and the detection rod are connected by a connecting spring; and a pressure sensor is inlaid on the bottom of the detection groove.

[0009] Preferably, a slide plate is provided between the electric push rod and the lead screw; the slide plate is connected to the lead screw by a spiral transmission; a strip groove is provided at the upper end of the slide plate; the electric push rod is installed in the strip groove; a pushing unit is installed in the strip groove; the pushing unit is used to push the electric push rod to slide in the strip groove.

[0010] Preferably, a cavity is provided inside the slide plate; a rotating drum is rotatably connected in the cavity; the rotating drum is spirally connected to the lead screw; teeth are fixedly connected to the surface of the rotating drum; a blocking groove is provided on the side wall of the cavity; a blocking rod is slidably connected in the blocking groove; the blocking rod is connected to the bottom of the blocking groove by a supporting spring; and an electromagnetic sheet is inlaid in the bottom of the blocking groove.

[0011] Preferably, the pushing unit includes a rack; a liquid storage chamber connected to the cavity is opened inside the slide; the rack is slidably and sealably connected in the liquid storage chamber; the rotating drum is meshed with the rack through teeth on the surface; a circular groove connected to the liquid storage chamber is opened on the side wall of the strip groove; a round rod is slidably and sealably connected in the circular groove; the end of the round rod away from the circular groove is fixedly connected to the electric push rod.

[0012] Preferably, two groups of detection rods are provided; the two groups of detection rods are staggered; and one end of the detection rod away from the detection slot is rotatably connected to a ball.

[0013] Preferably, a linear groove is opened at the upper end of the support platform; two baffles are slidingly and sealably connected in the linear groove; a screw is rotatably connected in the linear groove; the screw and the baffle are helically connected; a transmission unit is installed between the hydraulic push rod and the screw; the hydraulic push rod drives the screw to rotate through the transmission unit.

[0014] Preferably, the transmission unit comprises a steel wire rope; one end of the steel wire rope is fixedly connected to the clamping plate, and the other end is fixedly connected to the screw rod; the screw rod and the support platform are connected via a coil spring; and the threads at both ends of the screw rod are arranged oppositely.

[0015] Preferably, airbags are installed in both the linear groove and the slide groove; and both ends of the airbags are respectively connected to two baffles.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention achieves the measurement of the distance between the lower end surface of the rear longitudinal beam and the support platform according to the length of the detection rod and the elongation of the electric push rod through the cooperation between the detection rod and the electric push rod; and as the detection rod rolls along the lower end surface of the rear longitudinal beam, the pressure sensor compares the real-time sensed pressure with the standard value; not only the rising and falling distances of the detection rod can be obtained to determine whether the lower end of the rear longitudinal beam is deformed; but also the lifting and lowering distances of the detection rod can be determined, and the specific position and deformation of the arc-shaped part of the rear longitudinal beam can be detected; thereby providing accurate analysis data for detection personnel, so as to help analyze which link in the process has a production problem, thereby improving the production quality of the rear longitudinal beam.

[0018] The present invention provides a positioning rod that cooperates with the mounting hole. When the user places the rear longitudinal beam on the support platform, the mounting hole of the rear longitudinal beam needs to be aligned with the positioning rod so that the positioning rod is inserted into the mounting hole. When the clamping plate descends under the pull of the hydraulic push rod, the clamping plate will clamp the rear longitudinal beam. Since a positioning groove that is directly opposite to the positioning rod is provided on the surface of the clamping plate, the positioning rod is inserted into the positioning groove during the process of the clamping plate pressing the rear longitudinal beam, thereby allowing the clamping plate to detect rear longitudinal beams of different sizes and heights, thereby improving the practicability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0020] Figure 1 is a stereogram of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the present invention;

[0022] Figure 3 is a three-dimensional diagram of a support platform used in the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the machine body used in the present invention;

[0024] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0025] Figure 6 It is a schematic diagram of the structure of the slide plate used in the present invention;

[0026] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0027] Figure 8 yes Figure 6 Enlarged view of point C in the middle;

[0028] Fig. 9 is a schematic structural diagram of a detection rod used in the present invention;

[0029] In the figure: 1. body; 11. support platform; 111. hydraulic push rod; 112. positioning rod; 113. positioning groove; 12. clamping plate; 13. slide groove; 131. screw rod; 132. driving motor; 14. electric push rod; 141. detection groove; 142. detection rod; 143. connecting spring; 144. pressure sensor; 145. ball; 15. linear groove; 151. baffle; 152. screw rod; 16. wire rope; 161. coil spring; 17. air bag; 18. chassis; 2. slide plate; 21. strip groove; 22. cavity; 221. rotating drum; 222. teeth; 23. blocking groove; 231. blocking rod; 232. supporting spring; 233. electromagnetic sheet; 24. liquid storage cavity; 241. rack; 25. round groove; 251. round rod. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 9As shown, a deformation detection device for an integrated structural member of a rear longitudinal beam of an automobile according to the present invention comprises a body 1 and a chassis 18; the chassis 18 is located at the upper end of the body 1; a support platform 11 is fixedly installed on the upper end of the body 1; a clamping plate 12 is arranged on the upper end of the support platform 11; the clamping plate 12 and the support platform 11 are connected by a hydraulic push rod 111; a positioning rod 112 is fixedly connected to the upper end of the support platform 11; a positioning groove 113 facing the positioning rod 112 is provided on the surface of the clamping plate 12; a slide groove 13 is provided on the upper end of the body 1; the slide groove 1 3 is rotatably connected with a screw rod 131; a driving motor 132 is installed inside the body 1; the driving motor 132 is used to drive the screw rod 131 to rotate; an electric push rod 14 is slidably connected in the slide groove 13; the electric push rod 14 is connected to the screw rod 131; a detection groove 141 is opened at the upper end of the electric push rod 14; a detection rod 142 is slidably and sealably connected in the detection groove 141; the detection groove 141 and the detection rod 142 are connected by a connecting spring 143; a pressure sensor 144 is embedded in the bottom of the detection groove 141.

[0032] As an embodiment of the present invention, a slide plate 2 is arranged between the electric push rod 14 and the screw rod 131; the slide plate 2 is spirally connected to the screw rod 131; a strip groove 21 is opened at the upper end of the slide plate 2; the electric push rod 14 is installed in the strip groove 21; a pushing unit is installed in the strip groove 21; the pushing unit is used to push the electric push rod 14 to slide in the strip groove 21.

[0033] As an embodiment of the present invention, a cavity 22 is provided inside the skateboard 2; a rotating drum 221 is rotatably connected inside the cavity 22; the rotating drum 221 is spirally connected to the screw rod 131; teeth 222 are fixedly connected to the surface of the rotating drum 221; a blocking groove 23 is provided on the side wall of the cavity 22; a blocking rod 231 is slidably connected inside the blocking groove 23; the blocking rod 231 is connected to the bottom of the blocking groove 23 via a supporting spring 232; and an electromagnetic sheet 233 is inlaid at the bottom of the blocking groove 23.

[0034] As an embodiment of the present invention, the pushing unit includes a rack 241; a liquid storage chamber 24 connected to the cavity 22 is opened inside the slide plate 2; the rack 241 is slidably and sealedly connected in the liquid storage chamber 24; the rotating cylinder 221 is meshed with the rack 241 through the teeth 222 on the surface; a circular groove 25 connected to the liquid storage chamber 24 is opened on the side wall of the strip groove 21; a round rod 251 is slidably and sealedly connected in the circular groove 25; the end of the round rod 251 away from the circular groove 25 is fixedly connected to the electric push rod 14.

[0035] As an embodiment of the present invention, the detection rods 142 are provided with two groups; the two groups of detection rods 142 are staggered; one end of the detection rod 142 away from the detection slot 141 is rotatably connected with a ball 145;

[0036] During operation, the existing rear longitudinal beam needs to be inspected to see if the middle bending part meets the design standards; however, the inspection fixture is usually manufactured according to the design specifications and dimensions of the rear longitudinal beam and can only determine whether it is deformed; if the bending part of the rear longitudinal beam is deformed, its size and shape will deviate from the design requirements, resulting in the inability to fully adapt to the inspection fixture; for example, changes in the geometric shape of the bending part will cause the inspection fixture to be unable to fit or fix with the rear longitudinal beam, making it impossible for the inspection fixture to determine the deformation position and deformation amount of the rear longitudinal beam;

[0037] In this regard, the present invention cooperates with the detection rod 142 and the electric push rod 14, so as to measure the distance between the lower end surface of the rear longitudinal beam and the support platform 11 according to the length of the detection rod 142 and the elongation of the electric push rod 14; and as the detection rod 142 rolls along the lower end surface of the rear longitudinal beam, the pressure sensor 144 compares the real-time sensed pressure with the standard value; not only can the rising and falling distances of the detection rod 142 be obtained to determine whether the lower end of the rear longitudinal beam is deformed; but also the lifting and lowering distances of the detection rod 142 can be determined, and the specific position and deformation of the arc-shaped part of the rear longitudinal beam can be detected; thereby providing accurate analysis data for the detection personnel to help analyze which link in the process has a production problem, thereby improving the production quality of the rear longitudinal beam;

[0038] When the rear longitudinal beam is deformed, that is, the bending curvature of the rear longitudinal beam increases due to deformation, at this time, the detection rod 142 squeezes the connecting spring 143 and enters the detection groove 141 to increase the depth. At this time, the pressure sensor 144 senses the increase in pressure and controls the electric push rod 14 to descend, so that the connecting spring 143 stretches. At this time, the pressure sensed by the pressure sensor 144 decreases. When the pressure sensed by the pressure sensor 144 is the standard value, the contraction amount of the electric push rod 14 is the deformation height of the arc-shaped part of the rear longitudinal beam; similarly, when the bending curvature of the rear longitudinal beam decreases due to deformation, the detection rod 142 rises under the action of the restoring force of the connecting spring 143. At this time, the squeezing force of the connecting spring 143 on the pressure sensor 144 is reduced, and the electric push rod 14 is controlled to extend and push the pressure sensor 144 to squeeze the connecting spring 143. When the pressure sensed by the pressure sensor 144 is the standard value, the deformation height of the arc-shaped part of the rear longitudinal beam can be measured.

[0039] In the initial state, the hydraulic push rod 111 is in an extended state, at which time the clamping plate 12 is pushed away from the support platform 11 by the hydraulic push rod 111; the user directs the curved part of the rear longitudinal beam toward the machine body 1 and places its flat end on the support platform 11, and then controls the hydraulic push rod 111 to contract, so that the hydraulic push rod 111 pulls the clamping plate 12 down and approaches the rear longitudinal beam on the support platform 11, so that the clamping plate 12 presses the rear longitudinal beam against the support platform 11; then controls the electric push rod 14 to extend, so that the electric push rod 14 can push the detection rod 142 up to contact with the lower end of the rear longitudinal beam, and as the electric push rod 14 continues to push the detection rod 142 up, the detection rod 142 squeezes the connecting spring 143 in the detection groove 141 under the obstruction of the rear longitudinal beam. And enters the detection groove 141, at this time, the squeezed connecting spring 143 generates a squeezing force on the pressure sensor 144; when the pressure sensed by the pressure sensor 144 reaches the standard value, the electric push rod 14 stops extending; since the existing electric push rod 14 is equipped with a position sensor, the elongation of the electric push rod 14 can be monitored in real time; since the elastic coefficient of the connecting spring 143 is unchanged, that is, the ratio of the contraction amount of the connecting spring 143 to its elastic force is certain; therefore, the contraction amount of the connecting spring 143 can be determined according to the pressure sensed by the pressure sensor 144, thereby determining the height of the detection rod 142 extending out of the detection groove 141, and then according to the length of the detection rod 142 and the elongation of the electric push rod 14, the lower end of the rear longitudinal beam can be calculated. The distance between the surface and the support platform 11 is then controlled to drive the drive motor 132 to drive the screw rod 131 to rotate; so that the screw rod 131 can drive the slide plate 2 to slide in the slide groove 13, so that the slide plate 2 can drive the electric push rod 14 to move synchronously during the movement, so that the electric push rod 14 drives the detection rod 142 to slide along the lower end surface of the rear longitudinal beam; because the rear longitudinal beam is often required to be immediately anti-corrosion treated after welding to ensure that its surface will not be damaged or corroded due to exposure to the environment during the subsequent assembly process; such treatment usually includes surface cleaning, anti-rust coating or spraying protective paint and other measures; and when the detection rod 142 slides on the lower end surface of the rear longitudinal beam, the detection rod 142 will generate friction with the lower end surface of the rear longitudinal beam. In order to prevent the detection rod 1 42 causes friction damage to the anti-rust coating or protective paint on the lower end surface of the rear longitudinal beam; the present invention rotates and connects the ball 145 at the end of the detection rod 142 away from the detection groove 141, so that the detection rod 142 can roll with the lower end surface of the rear longitudinal beam through the ball 145, thereby changing the sliding friction between the detection rod 142 and the rear longitudinal beam into rolling friction, reducing the friction between the detection rod 142 and the rear longitudinal beam, avoiding the detection rod 142 from causing friction damage to the lower end surface of the rear longitudinal beam, and thus ensuring the quality of the rear longitudinal beam workpiece after detection; when the detection rod 142 rolls along the lower end surface of the rear longitudinal beam, the pressure sensor 144 will monitor and transmit the real-time induced pressure changes in the form of electrical signals to the monitoring receiving system in real time, so as to facilitate real-time observation by users;That is, when the detection rod 142 moves to the uneven concave or convex part of the lower end surface of the rear longitudinal beam, the detection rod 142 will extend out of the detection slot 141 and enter the groove under the action of the restoring force of the connecting spring 143, and the size of the pressure sensed by the pressure sensor 144 relative to the standard value can directly determine the contraction amount of the connecting spring 143, and then obtain the rising and falling distance of the detection rod 142, so as to directly determine the height of the protrusion or the depth of the concave at the lower end of the rear longitudinal beam, and according to the rising and falling distance of the detection rod 142, it is determined whether the protrusion or concave at the lower end of the rear longitudinal beam is deformed;

[0040] When the detection rod 142 moves to the curved arc portion of the rear longitudinal beam, the detection rod 142 will roll along the curved arc portion of the rear longitudinal beam through the ball 145. At this time, the rear longitudinal beam squeezes the detection rod 142 through the curved arc portion, so that the detection rod 142 can continuously enter the detection groove 141. At this time, the connecting spring 143 in the detection groove 141 is continuously compressed, and the pressure sensed by the pressure sensor 144 increases; if the curved arc portion of the rear longitudinal beam is deformed, it will cause the curved portion to be excessively bent, or stretch deformation (the curved portion of the rear longitudinal beam becomes smaller); when the curved portion is excessively bent, the end of the rear longitudinal beam away from the support platform 11 will be closer to the upper end surface of the body 1 due to excessive bending; therefore, when the detection rod 142 drives the ball 145 to roll along the curved portion, as the ball 145 passes over the deformed area of ​​the curved portion, the ball 145 is blocked by the curved portion As the downward movement increases, the detection rod 142 descends a greater distance, and the pressure on the pressure sensor 144 is inconsistent with the standard value, so that the specific position of the deformation of the arc-shaped part of the rear longitudinal beam can be detected. Similarly, when the arc-shaped part of the rear longitudinal beam is bent smaller, the descending height of the detection rod 142 decreases. At this time, the pressure sensed by the pressure sensor 144 is smaller than the standard value. At this time, it can be determined that the deformation of the arc-shaped part is a stretching deformation; to evaluate the deformation of the bent part of the rear longitudinal beam, so as to provide accurate analysis data for the detection personnel, to help analyze which link in the process has production problems, and thus improve the production quality of the rear longitudinal beam; compared with the existing laser rangefinder, the detection rod 142 is a physical contact detection, and the laser rangefinder will be affected by the reflection characteristics of the coating on the surface of the rear longitudinal beam, thereby affecting the measurement accuracy and stability of the deformation of the rear longitudinal beam;

[0041] When the clamping plate 12 presses the rear longitudinal beam onto the support platform 11, it is often manually placed by the user, which is easily affected by human factors and cannot ensure the accuracy of the clamping position of the clamping plate 12 on the rear longitudinal beam; as a result, the rear longitudinal beam cannot be correctly aligned with the detection rod 142 on the support platform 11, thereby affecting the detection effect of the detection rod 142; since the rear longitudinal beam is mostly fixed to the body of the car by bolts and nuts, mounting holes connected to the bolts are provided at both ends of the rear longitudinal beam; in this regard, a positioning rod 112 is provided to cooperate with the mounting hole, and when the user places the rear longitudinal beam When placed on the support platform 11, the mounting hole of the rear longitudinal beam needs to be aligned with the positioning rod 112 so that the positioning rod 112 is inserted into the mounting hole. When the clamping plate 12 is lowered under the pull of the hydraulic push rod 111, the clamping plate 12 will clamp the rear longitudinal beam. Since the clamping plate 12 is provided with a positioning groove 113 facing the positioning rod 112 on the surface, the positioning rod 112 is inserted into the positioning groove 113 during the process of the clamping plate 12 pressing the rear longitudinal beam, so that the clamping plate 12 can detect rear longitudinal beams of different sizes and heights, thereby improving the practicality of the present invention.

[0042] Since the detection rod 142 performs rolling detection on the lower end surface of the rear longitudinal beam through the ball 145, and for a large rear longitudinal beam, the area of ​​its lower end surface is large and the welding area is wide, so the distribution of the deformation area is relatively scattered; therefore, in order to improve the detection range and detection effect of the detection rod 142 on the lower end surface of the large rear longitudinal beam, the present invention provides two groups of detection rods 142, and each group of detection rods 142 has at least three detection rods, and the two groups of detection rods 142 are staggered, so that the two groups of detection rods 142 can detect the lower end surface of the rear longitudinal beam, thereby improving the detection range of the detection rod 142, so that the practicality of the present invention is improved; and For rear longitudinal beams of different models (sizes), the corresponding positions of the arc-shaped parts and the detection rod 142 will also change, that is, the position of the detection rod 142 needs to be adjusted in width; for this, the present invention sets a rack 241. Since the electromagnetic sheet 233 is in a power-off state in the initial state, the blocking rod 231 extends out of the blocking groove 23 and enters the cavity 22 under the push of the restoring force of the support spring 232. At this time, the blocking rod 231 is inserted between the two teeth 222 on the surface of the rotating drum 221. At this time, the rotating drum 221 is fixed to the slide plate 2 through the blocking rod 231. At this time, the driving motor 132 drives the rotating drum 221 to transmit spirally through the screw rod 131, so that The rotating drum 221 can drive the slide plate 2 to move; when it is necessary to adjust the detection rod 142 to move along the width direction of the rear longitudinal beam, the user only needs to control the electromagnetic sheet 233 to be energized, so that the electromagnetic sheet 233 absorbs the blocking rod 231 and enters the blocking groove 23, so that the rotating drum 221 is no longer connected to the slide plate 2. Since the rotating drum 221 is meshed with the rack 241 through the teeth 222, when the electric driving screw 131 is driven to rotate, the screw 131 can drive the rotating drum 221 to rotate synchronously, so that the rotating drum 221 pushes the meshed rack 241 to move toward the liquid storage chamber 24 on one side, so that the hydraulic oil in the liquid storage chamber 24 enters the circular groove under the push of the rack 241 25, so that the round rod 251 in the circular groove 25 extends out of the circular groove 25 under the push of the hydraulic oil, so that the round rod 251 extending out of the circular groove 25 pushes the electric push rod 14 to move to the other side thereof, so that the electric push rod 14 drives the detection rod 142 to move along the width direction of the rear longitudinal beam. By setting two liquid storage chambers 24 and two circular grooves 25, the rack 241 can slide in the two liquid storage chambers 24 by adjusting the rotation direction of the drive motor 132, so that the round rods 251 in the two circular grooves 25 push the electric push rod 14 to drive the detection rod 142 to move repeatedly along the width direction of the rear longitudinal beam; the scope of application of the present invention is further improved.

[0043] As an embodiment of the present invention, a linear groove 15 is opened at the upper end of the support platform 11; two baffles 151 are slidingly and sealably connected in the linear groove 15; a screw 152 is rotatably connected in the linear groove 15; the screw 152 is spirally connected to the baffle 151; a transmission unit is installed between the hydraulic push rod 111 and the screw 152; the hydraulic push rod 111 drives the screw 152 to rotate through the transmission unit.

[0044] As an embodiment of the present invention, the transmission unit includes a steel wire rope 16; one end of the steel wire rope 16 is fixedly connected to the clamp plate 12, and the other end is fixedly connected to the screw rod 152; the screw rod 152 is connected to the support platform 11 through a coil spring 161; the threads at both ends of the screw rod 152 are arranged oppositely.

[0045] As an embodiment of the present invention, airbags 17 are installed in both the linear groove 15 and the slide groove 13; both ends of the airbag 17 are connected to two baffles 151 respectively;

[0046] During operation, although the clamping plate 12 and the positioning rod 112 can position one end of the rear longitudinal beam, and the other end of the rear longitudinal beam is suspended under the action of its own rigidity, if it is not placed accurately, the rear longitudinal beam will still be offset to the left and right. For this, a baffle 151 is set. In the initial state, when the hydraulic push rod 111 pushes the clamping plate 12 to be located above the positioning rod 112, the clamping plate 12 pulls the screw rod 152 to rotate through the wire rope 16, so that the screw rod 152 will pull the coil spring 161 connected thereto to rotate during the rotation process, so that the coil spring 161 61 is tightened; when the user places the rear longitudinal beam on the support platform 11, the hydraulic push rod 111 is controlled to descend, so that the hydraulic push rod 111 drives the clamping plate 12 to descend, so that the tightened wire rope 16 between the clamping plate 12 and the screw rod 152 is released. At this time, the clamping plate 12 no longer generates a pulling force on the screw rod 152, so that the screw rod 152 rotates under the driving force of the coil spring 161, so that the rotating screw rod 152 can not only wrap the released wire rope 16 around its surface, but also drive the baffles 151 at both ends to move toward each other. The rear longitudinal beam is moved in the direction of approaching, so that the two sides of the rear longitudinal beam that are offset due to the inclination are blocked by the two planes of the two baffles 151 that are close to each other and are corrected; thereby avoiding the problem of the rear longitudinal beam inclination, so that the practicality of the present invention is improved; and by arranging air bags 17 in the linear groove 15 and the slide groove 13, the air bags 17 in the slide groove 13 are distributed on both sides of the slide plate 2, and the air bags 17 in the linear groove 15 are also distributed on both sides of the baffle 151, so that when the baffle 151 slides in the linear groove 15, the baffle 151 will squeeze the air bags on one side. The airbag 17 on one side and the airbag 17 on the other side are stretched, so that the airbag 17 in the linear groove 15 can always block the sand or impurities from the outside from entering the linear groove 15, and prevent the screw 152 in the linear groove 15 from being blocked by the sand or impurities, thereby ensuring the normal driving of the baffle 151 by the screw 152. Similarly, the airbag 17 in the slide groove 13 is used to block the impurities from the outside from entering the slide groove 13, and prevent the impurities from the outside from blocking the screw 131, thereby ensuring the normal driving of the slide plate 2 by the screw 131, so that the practicability of the present invention is further improved.

[0047] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A deformation detection device for an integrated structural component of a rear longitudinal beam of an automobile, comprising a body (1) and a chassis (18); the chassis (18) is located at the upper end of the body (1), and is characterized in that: A support platform (11) is fixedly mounted on the upper end of the machine body (1); a clamping plate (12) is arranged on the upper end of the support platform (11); the clamping plate (12) and the support platform (11) are connected via a hydraulic push rod (111); a positioning rod (112) is fixedly connected to the upper end of the support platform (11); a positioning groove (113) facing the positioning rod (112) is provided on the surface of the clamping plate (12); a slide groove (13) is provided on the upper end of the machine body (1); a screw rod (131) is rotatably connected in the slide groove (13); a driving electric motor is installed inside the machine body (1). The drive motor (132) is used to drive the screw rod (131) to rotate; an electric push rod (14) is slidably connected in the slide groove (13); the electric push rod (14) is connected to the screw rod (131); a detection groove (141) is provided at the upper end of the electric push rod (14); a detection rod (142) is slidably and sealably connected in the detection groove (141); the detection groove (141) and the detection rod (142) are connected via a connecting spring (143); a pressure sensor (144) is embedded in the bottom of the detection groove (141); A slide plate (2) is arranged between the electric push rod (14) and the screw rod (131); the slide plate (2) is connected to the screw rod (131) by spiral transmission; a strip groove (21) is provided at the upper end of the slide plate (2); the electric push rod (14) is installed in the strip groove (21); a pushing unit is installed in the strip groove (21); the pushing unit is used to push the electric push rod (14) to slide in the strip groove (21); The slide plate (2) is provided with a cavity (22) inside; a rotating drum (221) is rotatably connected inside the cavity (22); the rotating drum (221) is connected to a screw rod (131) by spiral transmission; teeth (222) are fixedly connected to the surface of the rotating drum (221); a blocking groove (23) is provided on the side wall of the cavity (22); a blocking rod (231) is slidably connected inside the blocking groove (23); the blocking rod (231) is connected to the bottom of the blocking groove (23) via a supporting spring (232); an electromagnetic sheet (233) is embedded in the bottom of the blocking groove (23); The pushing unit comprises a rack (241); a liquid storage cavity (24) communicating with the cavity (22) is provided inside the slide plate (2); the rack (241) is slidably and hermetically connected in the liquid storage cavity (24); the rotating cylinder (221) is meshed with the rack (241) through teeth (222) on the surface; a circular groove (25) communicating with the liquid storage cavity (24) is provided on the side wall of the strip groove (21); a round rod (251) is slidably and hermetically connected in the circular groove (25); one end of the round rod (251) away from the circular groove (25) is fixedly connected to the electric push rod (14); The detection rods (142) are provided in two groups; the two groups of detection rods (142) are distributed in a staggered manner; one end of the detection rod (142) away from the detection slot (141) is rotatably connected to a ball (145).

2. The deformation detection device for the integrated structural component of the rear longitudinal beam of an automobile according to claim 1, characterized in that: A linear groove (15) is provided at the upper end of the support platform (11); two baffles (151) are slidably and sealably connected in the linear groove (15); a screw rod (152) is rotatably connected in the linear groove (15); the screw rod (152) is connected to the baffle plate (151) by a spiral transmission; a transmission unit is installed between the hydraulic push rod (111) and the screw rod (152); the hydraulic push rod (111) drives the screw rod (152) to rotate through the transmission unit.

3. The deformation detection device for the integrated structural component of the rear longitudinal beam of an automobile according to claim 2, characterized in that: The transmission unit comprises a steel wire rope (16); one end of the steel wire rope (16) is fixedly connected to the clamping plate (12), and the other end is fixedly connected to the screw rod (152); the screw rod (152) and the support platform (11) are connected via a coil spring (161); and the threads at both ends of the screw rod (152) are arranged in opposite directions.

4. The deformation detection device for the integrated structural component of the rear longitudinal beam of an automobile according to claim 3, characterized in that: An air bag (17) is installed in both the linear groove (15) and the slide groove (13); two ends of the air bag (17) are respectively connected to two baffles (151).

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