A flexible detection device for the flatness of rear axle workpieces of vehicle bodies

Abstract

The present invention provides a flexible detection device for the flatness of a workpiece on a rear axle of a vehicle body, and belongs to the technical field of automobile body parts production; the device comprises a workbench, a plurality of support parts, a lifting mechanism, two flexible positioning mechanisms and two flatness detection mechanisms; one end of each support part is fixedly connected to the workbench, and the other end of the support part extends upward in a direction away from the workbench; the lifting mechanism is arranged on the end face of the workbench away from the ground; the movable end of the lifting mechanism selectively moves in a vertical direction and changes the distance from its fixed end; the lifting mechanism supports the workpiece to be detected, and makes the workpiece to be detected abut against the end face of the support part away from the workbench; the flexible positioning mechanism is used to abut and clamp the current posture of the workpiece to be detected; and the flatness detection mechanism is used to detect the flatness of different positions of the installation surface.

Description

Technical Field

[0001] The invention relates to the technical field of automobile body parts production, and in particular to a flexible detection device for the flatness of a rear axle workpiece of a vehicle body. Background Art

[0002] The rear axle assembly of the vehicle body is the rear drive shaft part of the vehicle power transmission. It is mainly used for transmitting torque between the frame and the wheels, cushioning the impact or vibration of the vehicle body, and making the vehicle turn. Figure 1 A stereoscopic image of a workpiece for a rear axle assembly of a vehicle body is shown. The rear axle workpiece of the vehicle body is welded and is in an arched shape as a whole. A pair of sleeve parts A extending outwards in an inclined manner are provided on the main body of the middle part of the rear axle workpiece of the vehicle body, and flange-type mounting surfaces B are provided at both ends of the workpiece. Before assembling the rear axle workpiece of the vehicle body, the central axis position of the sleeve part A needs to be fixed so as to detect the flatness of the mounting surface B, thereby verifying that the flatness of the mounting surface meets the requirements of the subsequent assembly process.

[0003] The Chinese patent application with publication number CN10884444A provides a rear drive axle housing flatness detection tool, which can detect the flatness of a single model of axle housing. However, when this detection tool encounters workpieces of the same series and similar models of vehicle body rear axle assemblies with similar shapes, due to some differences in the position or posture of the extended sleeve part, conventional flatness detection equipment cannot be flexibly applied. If a set of measuring fixtures is separately equipped for each specification of vehicle body rear axle assembly workpiece, the cost is very high and it requires a large space for storage. Therefore, it is very necessary to provide a flexible detection device that can adapt to the change of the sleeve part position and is suitable for the flatness detection needs of multiple workpieces in the same series. Summary of the invention

[0004] In view of this, the present invention proposes a flexible detection device that can fine-tune the position of the detection device according to the position of different sleeve parts, so as to be applicable to the flatness of various rear axle workpieces of the same type of vehicle bodies.

[0005] The technical solution of the present invention is implemented as follows: The present invention provides a flexible detection device for the flatness of a rear axle workpiece of a vehicle body, comprising a workbench (1), a plurality of support parts (2), a lifting mechanism (3), two flexible positioning mechanisms (4) and two flatness detection mechanisms (5);

[0006] Each support part (2) is arranged on an end surface of a side of the workbench (1) away from the ground, and is arranged at intervals along the horizontal length extension direction of the workbench (1); one end of each support part (2) is fixedly connected to the workbench (1), and the other end of the support part (2) extends upward in a direction away from the workbench (1);

[0007] The lifting mechanism (3) is arranged on the end face of the workbench (1) away from the ground; the fixed end of the lifting mechanism (3) is fixedly arranged on the workbench (1) between the support parts (2), and the movable end of the lifting mechanism (3) selectively moves along the vertical direction and changes the distance with the fixed end; the lifting mechanism (3) supports the workpiece to be inspected and makes the workpiece to be inspected abut against the end face of the support part (2) away from the workbench (1);

[0008] Two flexible positioning mechanisms (4) are arranged on the same side of the horizontal length extension direction of the lifting mechanism (3), and the flexible positioning mechanisms (4) selectively rotate relative to the workbench or move relative to the axial direction of the sleeve portion; the flexible positioning mechanisms (4) are used to press against and clamp the surface of the sleeve portion of the workpiece to be inspected, and maintain the current posture of the workpiece to be inspected;

[0009] Two flatness detection mechanisms (5) are arranged oppositely and at intervals at two ends of the horizontal length extension direction of the lifting mechanism (3); the flatness detection mechanisms (5) are used to detect the flatness of different positions of the installation surface.

[0010] On the basis of the above technical scheme, preferably, the movable end of the lifting mechanism (3) is provided with a first mounting plate (31) and a plurality of end face support rods (32); two protrusions are provided on the workpiece to be detected, and the two protrusions are arranged at intervals at the two end positions of the same arched side surface of the workpiece to be detected; the first mounting plate (31) is parallel to the workbench (1) and is arranged at intervals, and one or more end face support rods (32) are symmetrically arranged at both ends of the first mounting plate (31) in the horizontal extension direction, one end of the end face support rod (32) is fixedly connected to the first mounting plate (31), and the other end of the end face support rod (32) extends horizontally outward in a direction away from the first mounting plate (31), and the surface of each end face support rod (32) is abutted against the end face or side surface of the protrusion close to the workbench (1); the movable end of the lifting mechanism (3) drives the first mounting plate (31) and the plurality of end face support rods (32), and drives the workpiece to be detected to move along the vertical direction.

[0011] Preferably, a height limiting seat (33) is provided at the edge of the workbench (1) in the horizontal length extension direction; one end of the height limiting seat (33) is fixedly connected to the workbench (1), and the other end of the height limiting seat (33) extends outwardly along the vertical direction; the end surface of the height limiting seat (33) away from the workbench (1) is selectively spaced apart from the end surface of the first mounting plate (31) close to the workbench (1) or is mutually abutted against the end surface of the first mounting plate (31) close to the workbench (1).

[0012] Preferably, a positioning pin (21) is provided at the end of the support portion (2) away from the workbench (1), and the positioning pin (21) is vertically abutted against the edge of the workpiece to be inspected.

[0013] Preferably, the two flexible positioning mechanisms (4) both include a turntable assembly (41), a flexible angle adjustment assembly (42) and a sliding abutment assembly (43); the turntable assembly (41) is arranged on the workbench (1) and is located on the outer side of the other arched side surface of the workpiece to be detected; a sliding abutment assembly (43) is arranged on the side of the turntable assembly (41) away from the workbench (1); the end surface of the sliding abutment assembly (43) close to the workbench (1) is rotatably connected to the turntable assembly (41); the flexible angle adjustment assembly (42) is arranged between the sliding abutment assembly (43) and the turntable assembly (41); and the flexible angle adjustment assembly (42) can also selectively lock the relative position of the turntable assembly (41) and the sliding abutment assembly (43) or adjust the sliding abutment assembly (43) to rotate a certain angle relative to the central axis of the fixed turntable assembly (41); the sliding abutment assembly (43) is used to clamp and abut against different surfaces of the sleeve portion of the workpiece to be detected.

[0014] Further preferably, the flexible angle adjustment component (42) includes two first positioning blocks (421), a second positioning block (422) and two first gap adjustment components (423); the two first positioning blocks (421) are arranged oppositely and at intervals on the end surface of the turntable component (41) away from the workbench (1); the second positioning block (422) is fixedly arranged on the end surface of the sliding abutment component (43) close to the workbench (1), and the second positioning block (422) extends vertically downward in a direction away from the surface of the sliding abutment component (43), and the second positioning block (422) is located between the two first positioning blocks (421); the first gap adjustment component (423) and the first positioning block (421) are connected in a sliding or rotating manner with a position locking function, and the other end of the first gap adjustment component (423) abuts against the surface of the second positioning block (422); the two first gap adjustment components (423) adjust the rotation angle of the second positioning block (422) and the sliding abutment component (43) relative to the central axis of the turntable component (41).

[0015] Further preferably, the sliding abutment assembly (43) comprises a base (431), a second mounting plate (432), a first slider (433), a second slider (434), a first linear motion device (435), a second linear motion device (436), a third linear motion device (437) and a first clamping portion (438); the base (431) is rotatably connected to the turntable assembly (41); the second mounting plate (432), the first slider (433), the second slider (434), a first linear motion device (435), a second linear motion device (436), a third linear motion device (437) and a first clamping portion (438); the base (431) is rotatably connected to the turntable assembly (41); the end of the base (431) away from the workbench (1) is provided with the second mounting plate (432), the first slider (433), the second slider (434), the first linear motion device (435), the second linear motion device (436), the third linear motion device (437) and the first clamping portion (438); The first slider (433) and the second slider (434) are arranged in sequence and at intervals; the second slider (432) is fixedly connected to the base (431), and the first slider (433) or the second slider (434) is slidably connected to the base (431); the first linear motion device (435) and the second linear motion device (436) are respectively arranged on the non-adjacent end surfaces of the first slider (433) and the second slider (434) in a relative manner. , and the fixed end of the first linear motion device (435) is fixedly connected to the first slider (433), and the movable end of the first linear motion device (435) passes through the first slider (433) and is fixedly connected to the second mounting plate (432); the fixed end of the second linear motion device (436) is fixedly connected to the second slider (434), and the movable end of the second linear motion device (436) passes through the second slider (434) and is fixedly connected to the second mounting plate (432), and the second slider (434) is away from the base (431) A first clamping portion (438) is provided at one end of the sleeve portion, and the first clamping portion (438) abuts against one end surface of the sleeve portion in the axial extension direction; a third linear motion device (437) is also provided on the first slider (433), and the fixed end of the third linear motion device (437) is fixedly connected to the first slider (433), and the movable end of the third linear motion device (437) extends into and abuts against the inner surface of the other end of the sleeve portion in the axial extension direction; the second mounting plate (432) also abuts against the outer surface of the sleeve portion in the axial extension direction. Insertion portion 439

[0016] Further preferably, it also includes two third positioning blocks (44) and two second gap adjustment components (45); the third positioning blocks (44) are symmetrically arranged on the workbench (1) at both ends of the horizontal extension direction of a turntable component (41), and the turntable component (41) is slidably connected to the worktable (1), the third positioning block (44) is fixedly connected to the worktable (1), and the third positioning block (44) is spaced apart from the worktable (1); the second gap adjustment component (45) is arranged on the third positioning block (44), and the second gap adjustment component (45) and the third positioning block (44) are connected in a sliding or rotating manner with a position locking function; the end of the second gap adjustment component (45) away from the third positioning block (44) is also abutted against the surface of the turntable component (41); the two second gap adjustment components (45) adjust the distance between the turntable component (41) and the two third positioning blocks (44).

[0017] On the basis of the above technical solution, preferably, the flatness detection mechanism (5) comprises a fourth linear motion device (51), a plurality of second clamping parts (52) and a plurality of displacement measuring mechanisms (53); the fourth linear motion device (51) is arranged opposite to the mounting surface of the workpiece to be detected, and the fixed end of the fourth linear motion device (51) is fixedly arranged relative to the workbench (1); a through hole is arranged on the mounting surface, and a plurality of second clamping parts (52) and a plurality of displacement measuring mechanisms (53) are arranged on the movable end of the fourth linear motion device (51); the movable end of the fourth linear motion device (51) is extended so that each second clamping part (52) abuts against the side surface of the through hole in the circumferential direction, and the displacement measuring mechanism (53) abuts against different vertex positions of the mounting surface.

[0018] On the basis of the above technical solution, preferably, it also includes a plurality of guide assemblies (6), wherein the guide assemblies (6) are arranged on the end surface of the workbench (1) away from the ground, and the guide assemblies (6) are arranged at intervals between the two flatness detection mechanisms (5); each guide assembly (6) also extends upward and outward in a direction away from the workbench (1); and the side surface of the guide assembly (6) is abutted or slidably connected to the side surface of the workpiece to be detected.

[0019] The flexible detection device for the flatness of a rear axle workpiece of a vehicle body provided by the present invention has the following beneficial effects compared with the prior art:

[0020] (1) This solution realizes adaptive detection of multiple similar workpieces of the same type through the coordination of a lifting mechanism that can lift and lower the height, a flexible positioning mechanism that can freely adjust the horizontal, rotation angle and axial direction of the sleeve, and a flatness detection mechanism that detects the position and flatness of the mounting surface, thereby effectively improving the scope of application of the equipment;

[0021] (2) The lifting mechanism cooperates with the support part or the guide assembly to smoothly realize the operation of taking or placing the workpiece to be inspected, and stabilize the placed workpiece at the corresponding height and posture;

[0022] (3) Before the workpiece to be inspected is clamped by the flexible positioning mechanism, the position, rotation angle, etc. of the flexible positioning mechanism on the workbench are pre-adjusted according to the characteristics or parameters of the workpiece to facilitate accurate clamping of each surface of the sleeve part; after the flexible positioning mechanism, the lifting mechanism and the supporting part define the position of the workpiece, the flatness detection mechanism performs multi-point detection of the installation surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of a workpiece for a vehicle body rear axle assembly;

[0025] Figure 2 A top view of a workpiece for a vehicle body rear axle assembly;

[0026] Figure 3 A three-dimensional diagram of a flexible detection device for flatness of a rear axle workpiece of a vehicle body according to the present invention;

[0027] Figure 4 A top view of a flexible detection device for flatness of a rear axle workpiece of a vehicle body according to the present invention;

[0028] Figure 5 It is a three-dimensional diagram of the combined state of a workbench, a support part, a lifting mechanism and a guide assembly of a flexible detection device for the flatness of a workpiece of a rear axle of a vehicle body according to the present invention;

[0029] Figure 6 for Figure 5 A top view of

[0030] Figure 7 for Figure 5 Front view of

[0031] Figure 8 It is a three-dimensional diagram of the combined state of a flexible positioning mechanism of a flexible detection device for the flatness of a workpiece of a vehicle body rear axle and a workpiece for a vehicle body rear axle assembly according to the present invention;

[0032] Fig. 9 It is a three-dimensional diagram of the exploded state of the flexible positioning mechanism part of a flexible detection device for the flatness of a workpiece of a rear axle of a vehicle body according to the present invention;

[0033] Fig.10 A three-dimensional diagram of a flexible positioning mechanism of a flexible detection device for flatness of a rear axle workpiece of a vehicle body according to the present invention;

[0034] Fig.11 It is a rear view of a flexible positioning mechanism of a flexible detection device for flatness of a rear axle workpiece of a vehicle body according to the present invention;

[0035] Fig.12 A bottom view of a flexible positioning mechanism of a flexible detection device for flatness of a rear axle workpiece of a vehicle body according to the present invention;

[0036] Fig.13 A three-dimensional diagram of a flatness detection mechanism of a flexible detection device for flatness of a rear axle workpiece of a vehicle body according to the present invention;

[0037] Fig.14 It is a front view of a flexible detection device for flatness of a rear axle workpiece of a vehicle body according to the present invention;

[0038] Fig.15 The present invention is a top view of a flexible detection device for the flatness of a workpiece on a rear axle of a vehicle body. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The technical solution of the present invention is achieved as follows: Figure 1 As shown in FIG. 7 , the present invention provides a flexible detection device for the flatness of a workpiece of a rear axle of a vehicle body, comprising a workbench 1, a plurality of support parts 2, a lifting mechanism 3, two flexible positioning mechanisms 4 and two flatness detection mechanisms 5, etc.

[0041] Each support part 2 is arranged on the end surface of one side of the workbench 1 away from the ground, and is arranged at intervals along the horizontal length extension direction of the workbench 1. One end of each support part 2 is fixedly connected to the workbench 1, and the other end of the support part 2 extends upward in a direction away from the workbench 1. The workbench 1 is used to place or fix other mechanisms. The support part 2 is used to define and support the final position of the workpiece to be detected.

[0042] The lifting mechanism 3 is arranged on the end face of the workbench 1 away from the ground; the fixed end of the lifting mechanism 3 is fixedly arranged on the workbench 1 between the supporting parts 2, and the movable end of the lifting mechanism 3 selectively moves along the vertical direction and changes the distance with its fixed end; the lifting mechanism 3 supports the workpiece to be inspected and makes the workpiece to be inspected abut against the end face of the supporting part 2 away from the workbench 1. When the lifting mechanism 3 is raised, it is used to take out or put in the workpiece to be inspected, and when the lifting mechanism 3 is lowered, it carries the workpiece to be inspected and descends together until the workpiece to be inspected contacts the supporting part 2.

[0043] Two flexible positioning mechanisms 4 are arranged on the same side of the horizontal length extension direction of the lifting mechanism 3, and the flexible positioning mechanism 4 selectively rotates relative to the workbench or moves relative to the axial direction of the sleeve part A; the flexible positioning mechanism 4 is used to adjust to the axial direction of the sleeve part A of the current workpiece, and then press against and clamp the surface of the sleeve part A of the workpiece to be inspected to facilitate subsequent flatness detection.

[0044] Two flatness detection mechanisms 5 are arranged oppositely and spaced apart at the two ends of the horizontal length extension direction of the lifting mechanism 3; the flatness detection mechanism 5 is used to detect the flatness of different positions of the mounting surface B, so as to obtain the flatness of the two mounting surfaces B. If the flatness requirements are met, the workpiece to be inspected is a qualified product, otherwise it is an unqualified product.

[0045] like Figure 5 As shown in FIG. 7 , in order to better limit the posture of the workpiece to be inspected on the lifting mechanism 3, a first mounting plate 31 and a plurality of end face support rods 32 are arranged at the movable end of the lifting mechanism 3; two protrusions C are arranged on the workpiece to be inspected, and the two protrusions C are arranged at intervals at the two end positions of the same arched side surface of the workpiece to be inspected; the first mounting plate 31 is parallel to the workbench 1 and is arranged at intervals, and one or more end face support rods 32 are symmetrically arranged at both ends of the first mounting plate 31 in the horizontal extension direction, one end of the end face support rod 32 is fixedly connected to the first mounting plate 31, and the other end of the end face support rod 32 extends horizontally outward in the direction away from the first mounting plate 31, and the surface of each end face support rod 32 is abutted against the end face or side surface of the protrusion C close to the workbench 1; the movable end of the lifting mechanism 3 drives the first mounting plate 31 and the plurality of end face support rods 32, and drives the workpiece to be inspected to move along the vertical direction. As can be seen from the accompanying drawings, the end support rods 32 at different positions are adapted to the height of the surface of the workpiece to be inspected, thereby supporting the end face or side surface of the raised portion C to prevent the workpiece to be inspected from shaking or even falling on the movable end of the lifting mechanism 3 during the rising or falling process of the movable end of the lifting mechanism 3.

[0046] Likewise Figure 5As shown in FIG. 7 , in order to further limit the vertical moving distance of the movable end of the jacking mechanism 3, a height limiting seat 33 is provided at the edge of the horizontal length extension direction of the workbench 1; one end of the height limiting seat 33 is fixedly connected to the workbench 1, and the other end of the height limiting seat 33 extends outward along the vertical direction; the end face of the height limiting seat 33 away from the workbench 1 is selectively spaced apart from the end face of the first mounting plate 31 close to the workbench 1 or mutually abutted against the end face of the first mounting plate 31 close to the workbench 1. When the jacking mechanism 3 descends to the limit position, the first mounting plate 31 abuts against the height limiting seat 33, and the workpiece to be inspected also abuts against the support part 2; when the inspection is completed, the jacking mechanism 3 rises, and the first mounting plate 31 separates from the height limiting seat 33, that is, the first mounting plate 31 and the height limiting seat 33 are spaced apart. The jacking mechanism 3 can be implemented by a linear actuator such as a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0047] In order to better match the curved surface shape of the edge of the workpiece to be inspected, a further improvement is that a positioning pin 21 is provided at the end of the support part 2 away from the workbench 1, and the positioning pin 21 vertically abuts against the edge position of the workpiece to be inspected.

[0048] like Figure 8 As shown in FIG. 12, before the flatness detection is performed, the current posture of the flexible positioning mechanism 4 should be adjusted according to the model of the current workpiece. Accordingly, the two flexible positioning mechanisms 4 both include a turntable assembly 41, a flexible angle adjustment assembly 42 and a sliding abutment assembly 43; the turntable assembly 41 is arranged on the workbench 1 and is located outside the other arcuate side surface of the workpiece to be detected, the turntable assembly 41 is provided with a sliding abutment assembly 43 on the side away from the workbench 1, and the side end surface of the sliding abutment assembly 43 close to the workbench 1 is rotatably connected with the turntable assembly 41, the flexible angle adjustment assembly 42 is arranged between the sliding abutment assembly 43 and the turntable assembly 41, and the flexible angle adjustment assembly 42 also selectively locks the relative position of the turntable assembly 41 and the sliding abutment assembly 43 or adjusts the sliding abutment assembly 43 to rotate a certain angle relative to the central axis of the fixed turntable assembly 41; the sliding abutment assembly 43 is used to clamp and abut on different surfaces of the sleeve portion A of the workpiece to be detected. The turntable assembly 41 and the flexible angle adjustment assembly 42 cooperate to drive the sliding abutment assembly 43 to rotate a certain angle relative to the central axis of the turntable assembly 41. The sliding abutment assembly 43 abuts against different surfaces of the sleeve portion A from at least two directions along the axial direction of the sleeve portion A, locks the position of the sleeve portion A, and cooperates with the lifting mechanism 3 to limit the final posture of the workpiece to be inspected.

[0049] like Fig.11As shown, the flexible angle adjustment component 42 includes two first positioning blocks 421, a second positioning block 422 and two first gap adjustment components 423; the two first positioning blocks 421 are arranged oppositely and at intervals on the end surface of the turntable component 41 away from the workbench 1; the second positioning block 422 is fixedly arranged on the end surface of the sliding abutment component 43 close to the workbench 1, and the second positioning block 422 extends vertically downward in the direction away from the surface of the sliding abutment component 43, and the second positioning block 422 is located between the two first positioning blocks 421; the first gap adjustment component 423 and the first positioning block 421 are connected by sliding or rotating with a position locking function, and the other end of the first gap adjustment component 423 abuts against the surface of the second positioning block 422; the two first gap adjustment components 423 adjust the rotation angle of the second positioning block 422 and the sliding abutment component 43 relative to the central axis of the turntable component 41. As can be seen from the figure, by adjusting the extended length of the first gap adjustment component 423 on both sides of the second positioning block 422 respectively, the rotation angle of the sliding support component 43 relative to the turntable component 41 can be fine-tuned in the clockwise or counterclockwise direction to adapt to the position of the sleeve of the current workpiece to be detected. The sliding or rotating connection with the position locking function can be realized by a threaded fastening connection method, that is, the first gap adjustment component 423 adopts a screw rod, the first gap adjustment component 423 is slidably or threadedly connected to the first positioning block 421, and nuts are set on the surface of the first gap adjustment component 423 at both ends of the first positioning block 421 to limit the current position of the first gap adjustment component 423. A reset spring can also be set on the surface of the first gap adjustment component 423, and the reset spring can prevent the first gap adjustment component 423 from falling off.

[0050] like Fig.10As shown in FIG. 12, the sliding and holding assembly 43 includes a base 431, a second mounting plate 432, a first slider 433, a second slider 434, a first linear motion device 435, a second linear motion device 436, a third linear motion device 437 and a first clamping portion 438; the base 431 is rotatably connected to the turntable assembly 41; the second mounting plate 432, the first slider 433 and the second slider 434 are arranged at an end of the base 431 away from the workbench 1, and the first slider 433, the second mounting plate 432 and the second slider 434 are arranged in sequence; the second mounting plate 432 is fixedly connected to the base 431, and the first slider 433 or the second slider 434 is slidably connected to the base 431; the first linear motion device 435 and the second linear motion device 436 are respectively arranged on the non-adjacent end surfaces of the first slider 433 and the second slider 434, and the first linear motion device The fixed end of 435 is fixedly connected to the first slider 433, and the movable end of the first linear motion device 435 passes through the first slider 433 and is fixedly connected to the second mounting plate 432; the fixed end of the second linear motion device 436 is fixedly connected to the second slider 434, and the movable end of the second linear motion device 436 passes through the second slider 434 and is fixedly connected to the second mounting plate 432. The end of the second slider 434 away from the base 431 is provided with a first clamping portion 438, and the first clamping portion 438 abuts against one side end face of the sleeve portion A in the axial extension direction; the third linear motion device 437 is also provided on the first slider 433, and the fixed end of the third linear motion device 437 is fixedly connected to the first slider 433, and the movable end of the third linear motion device 437 extends into and abuts against the inner surface of the other end of the sleeve portion in the axial extension direction; the second mounting plate 432 also abuts against the outer surface of the sleeve portion in the axial extension direction.

[0051] The overall shape of the base 431 shown in the figure is L-shaped; the first slider 433, the second mounting plate 432 and the second slider 434 are sequentially arranged on the vertically arranged part of the base 431, wherein the second mounting plate 432 cannot be moved, and the spacing between the first slider 433 or the second slider 434 and the second mounting plate 432 is adjusted by the first linear motion device 435 or the second linear motion device 436 respectively, so as to approach the two ends of the sleeve part A in the axial direction respectively, so that the first clamping portion 438 on the second slider 434 abuts against one end of the sleeve part A in the axial direction, and the other end of the sleeve part A in the axial direction is abutted and extended by the movable end of the third linear motion device 437. In order to better abut the inner surface of the sleeve part A, a cylindrical plug-in portion 439 can be further arranged at the movable end of the third linear motion device 437. The first linear motion device 435, the second linear motion device 436 and the third linear motion device 437 can be implemented by using one of a cylinder, a hydraulic cylinder or an electric push rod. In order to facilitate the first slider 433 or the second slider 434 to slide relative to the base 431 , a linear slide rail may be provided on the base 431 to reduce sliding resistance and limit the moving direction.

[0052] Likewise Fig.11 As shown, as a further preferred scheme, the extended length of the sleeve portion A of the workpiece to be inspected in a serial design may change. To cope with this situation, the flexible positioning mechanism 4 of this scheme also includes two third positioning blocks 44 and two second gap adjustment components 45; a third positioning block 44 is symmetrically arranged on the workbench 1 at both ends of the horizontal extension direction of a turntable component 41, and the turntable component 41 is slidably connected to the worktable 1, the third positioning block 44 is fixedly connected to the worktable 1, and the third positioning block 44 is spaced apart from the worktable 1; the second gap adjustment component 45 is arranged on the third positioning block 44, and the second gap adjustment component 45 and the third positioning block 44 are connected in a sliding or rotating manner with a position locking function; the end of the second gap adjustment component 45 away from the third positioning block 44 also abuts against the surface of the turntable component 41; the two second gap adjustment components 45 adjust the spacing between the turntable component 41 and the two third positioning blocks 44. The second gap adjustment assembly 45 can also be connected to the third positioning block 44 by threaded fastening. By adjusting the extension length of the second gap adjustment assembly 45 on both sides of the bottom of the turntable assembly 41, the distance between the turntable assembly 41 and the workpiece to be inspected can be changed. In order to better slide the turntable assembly 41, a horizontal slide rail can be set between the turntable assembly 41 and the workbench.

[0053] like Fig.13As shown in FIG. 15 , the flatness detection mechanism 5 includes a fourth linear motion device 51, a plurality of second clamping parts 52 and a plurality of displacement measuring mechanisms 53; the fourth linear motion device 51 is arranged opposite to the mounting surface of the workpiece to be detected, and the fixed end of the fourth linear motion device 51 is fixedly arranged relative to the workbench 1; a through hole is arranged on the mounting surface, and a plurality of second clamping parts 52 and a plurality of displacement measuring mechanisms 53 are arranged on the movable end of the fourth linear motion device 51; the movable end of the fourth linear motion device 51 is extended so that each second clamping part 52 abuts against the side surface of the through hole in the circumferential direction, and the displacement measuring mechanism 53 abuts against different vertex positions of the mounting surface B.

[0054] In order to pre-position the workpiece to be inspected and better place the workpiece on the first mounting plate 31 of the lifting mechanism 3, the present invention further includes a plurality of guide assemblies 6. The guide assemblies 6 are arranged on the end surface of the workbench 1 away from the ground, and the guide assemblies 6 are arranged between the two flatness detection mechanisms 5 at intervals; each guide assembly 6 also extends upward and outward in a direction away from the workbench 1; the side surface of the guide assembly 6 is abutted or slidably connected with the side surface of the workpiece to be inspected. The guide assembly 6 is rod-shaped, and the surface of the workpiece to be inspected can slide with the guide assembly 6.

[0055] The working process of the present invention is: pre-adjust the position of the turntable assembly 41 of the flexible positioning mechanism 4 on the workbench or the rotation angle of the sliding support assembly 43 relative to the turntable assembly 41, so that the first linear motion device 435, the second linear motion device 436 and the third linear motion device 437 are in an open state, and then the workpiece to be inspected is placed along the gap between the guide assemblies 6, and the workpiece to be inspected is supported on the first mounting plate 31 at the movable end of the lifting mechanism 3, and then the movable end of the lifting mechanism 3 is lowered, and the first linear motion device 435, the second linear motion device 436 and the third linear motion device 437 are respectively actuated and extended, and the first clamping portion 438 is abutted against one end of the sleeve portion A in the axial direction, and the cylindrical plug-in portion 439 extends into and is supported against the other end of the sleeve portion A in the axial direction. Then the movable end of the flatness detection mechanism 5 moves to detect different positions of each mounting surface B, and detects whether the flatness of each mounting surface B is less than the threshold value of 0.1 mm. If it exceeds the threshold value, it means that the flatness of the workpiece to be detected is unqualified. If it does not exceed the threshold value, it means that the flatness of the workpiece to be detected is qualified. After the detection is completed, the first linear motion device 435, the second linear motion device 436 and the third linear motion device 437 are all reset, and the movable end of the lifting mechanism 3 rises to lift the workpiece after detection, and the workpiece can be taken out.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible detection device for the flatness of a rear axle workpiece of a vehicle body, comprising a workbench (1) and a plurality of support parts (2); each support part (2) is arranged on an end surface of the workbench (1) away from the ground, and is arranged at intervals along the horizontal length extension direction of the workbench (1); one end of each support part (2) is fixedly connected to the workbench (1), and the other end of the support part (2) extends upward in a direction away from the workbench (1); It is characterized in that It also includes a lifting mechanism (3), two flexible positioning mechanisms (4) and two flatness detection mechanisms (5); The lifting mechanism (3) is arranged on the end surface of the workbench (1) away from the ground; the fixed end of the lifting mechanism (3) is fixedly arranged on the workbench (1) between the support parts (2), and the movable end of the lifting mechanism (3) selectively moves along the vertical direction and changes the distance with the fixed end of the lifting mechanism (3); the lifting mechanism (3) supports the workpiece to be inspected and makes the workpiece to be inspected abut against the end surface of the support part (2) away from the workbench (1); Two flexible positioning mechanisms (4) are arranged on the same side of the horizontal length extension direction of the lifting mechanism (3), and the flexible positioning mechanisms (4) selectively rotate relative to the workbench or move relative to the axial direction of the sleeve portion; the flexible positioning mechanisms (4) are used to press against and clamp the surface of the sleeve portion of the workpiece to be inspected, and maintain the current posture of the workpiece to be inspected; Two flatness detection mechanisms (5) are arranged oppositely and at intervals at two ends of the horizontal length extension direction of the lifting mechanism (3); the flatness detection mechanisms (5) are used to detect the flatness of different positions of the installation surface; The movable end of the lifting mechanism (3) is provided with a first mounting plate (31) and a plurality of end surface supporting rods (32); two protrusions are provided on the workpiece to be detected, and the two protrusions are arranged at intervals at the two end positions of the same arched side surface of the workpiece to be detected; the first mounting plate (31) is parallel to the worktable (1) and is arranged at intervals, and one or more end surface supporting rods (32) are symmetrically arranged at both ends of the first mounting plate (31) in the horizontal extension direction, one end of the end surface supporting rod (32) is fixedly connected to the first mounting plate (31), and the other end of the end surface supporting rod (32) extends horizontally outward in a direction away from the first mounting plate (31), and the surface of each end surface supporting rod (32) is abutted against the end surface or side surface of the protrusion close to the worktable (1); the movable end of the lifting mechanism (3) drives the first mounting plate (31) and the plurality of end surface supporting rods (32), and drives the workpiece to be detected to move along the vertical direction; The two flexible positioning mechanisms (4) each comprise a turntable assembly (41), a flexible angle adjustment assembly (42) and a sliding abutment assembly (43); the turntable assembly (41) is arranged on the worktable (1) and is located outside the other arcuate side surface of the workpiece to be detected; a sliding abutment assembly (43) is arranged on a side of the turntable assembly (41) away from the worktable (1); an end surface of the sliding abutment assembly (43) close to the worktable (1) is rotatably connected to the turntable assembly (41); the flexible angle adjustment assembly (42) is arranged between the sliding abutment assembly (43) and the turntable assembly (41); and the flexible angle adjustment assembly (42) can also selectively lock the relative position of the turntable assembly (41) and the sliding abutment assembly (43) or adjust the sliding abutment assembly (43) to rotate a certain angle relative to the central axis of the fixed turntable assembly (41); the sliding abutment assembly (43) is used to clamp and abut against different surfaces of the sleeve portion of the workpiece to be detected.

2. The flexible detection device for flatness of rear axle workpiece of a vehicle body according to claim 1, characterized in that: A height limiting seat (33) is provided at the edge of the workbench (1) in the horizontal extension direction; one end of the height limiting seat (33) is fixedly connected to the workbench (1), and the other end of the height limiting seat (33) extends outwardly along the vertical direction; the end surface of the height limiting seat (33) away from the workbench (1) is selectively spaced apart from the end surface of the first mounting plate (31) close to the workbench (1) or mutually abuts against the end surface of the first mounting plate (31) close to the workbench (1).

3. The flexible detection device for flatness of a rear axle workpiece of a vehicle body according to claim 1, characterized in that: A positioning pin (21) is provided at the end of the support portion (2) away from the workbench (1), and the positioning pin (21) is vertically abutted against the edge of the workpiece to be inspected.

4. The flexible detection device for flatness of a rear axle workpiece of a vehicle body according to claim 1, characterized in that: The flexible angle adjustment component (42) comprises two first positioning blocks (421), a second positioning block (422) and two first gap adjustment components (423); the two first positioning blocks (421) are arranged oppositely and at intervals on the end surface of the turntable component (41) away from the worktable (1); the second positioning block (422) is fixedly arranged on the end surface of the sliding abutting component (43) close to the worktable (1), and the second positioning block (422) extends vertically downward in a direction away from the surface of the sliding abutting component (43), and the second positioning block (422) is located between the two first positioning blocks (421); the first gap adjustment component (423) and the first positioning block (421) are connected in a sliding or rotating manner with a position locking function, and the other end of the first gap adjustment component (423) abuts against the surface of the second positioning block (422); the two first gap adjustment components (423) adjust the rotation angle of the second positioning block (422) and the sliding abutting component (43) relative to the central axis of the turntable component (41).

5. The flexible detection device for flatness of a rear axle workpiece of a vehicle body according to claim 4, characterized in that: The sliding abutment assembly (43) comprises a base (431), a second mounting plate (432), a first slider (433), a second slider (434), a first linear motion device (435), a second linear motion device (436), a third linear motion device (437) and a first clamping portion (438); the base (431) is rotatably connected to the turntable assembly (41); A second mounting plate (432), a first slider (433) and a second slider (434) are arranged at one end of the base (431) away from the workbench (1); the first slider (433), the second mounting plate (432) and the second slider (434) are arranged in sequence and at intervals; the second mounting plate (432) is fixedly connected to the base (431); the first slider (433) or the second slider (434) is slidably connected to the base (431); the first linear motion device (435) and the second linear motion device (436) are respectively arranged on non-adjacent end surfaces of the first slider (433) and the second slider (434) in a manner opposite to each other; the fixed end of the first linear motion device (435) is fixedly connected to the first slider (433); the movable end of the first linear motion device (435) passes through the first slider (433) and the second mounting plate. (432) is fixedly connected; the fixed end of the second linear motion device (436) is fixedly connected to the second slider (434), the movable end of the second linear motion device (436) passes through the second slider (434) and is fixedly connected to the second mounting plate (432), and the end of the second slider (434) away from the base (431) is provided with a first clamping portion (438), and the first clamping portion (438) abuts against one end surface of the sleeve portion in the axial extension direction; the third linear motion device (437) is also provided on the first slider (433), the fixed end of the third linear motion device (437) is fixedly connected to the first slider (433), and the movable end of the third linear motion device (437) extends into and abuts against the inner surface of the other end of the sleeve portion in the axial extension direction; the second mounting plate (432) also abuts against the outer surface of the sleeve portion in the axial extension direction.

6. The flexible detection device for flatness of a rear axle workpiece of a vehicle body according to claim 4, characterized in that: The invention also comprises two third positioning blocks (44) and two second gap adjustment components (45); the third positioning blocks (44) are symmetrically arranged on the workbench (1) at both ends of the horizontal extension direction of a turntable component (41), and the turntable component (41) is slidably connected to the workbench (1), the third positioning blocks (44) are fixedly connected to the workbench (1), and the third positioning blocks (44) are arranged at a distance from the workbench (1); the second gap adjustment component (45) is arranged on the third positioning block (44), and the second gap adjustment component (45) and the third positioning block (44) are connected in a sliding or rotating manner with a position locking function; the end of the second gap adjustment component (45) away from the third positioning block (44) is also held against the surface of the turntable component (41); and the two second gap adjustment components (45) adjust the distance between the turntable component (41) and the two third positioning blocks (44).

7. The flexible detection device for flatness of a rear axle workpiece of a vehicle body according to claim 1, characterized in that: The flatness detection mechanism (5) comprises a fourth linear motion device (51), a plurality of second clamping parts (52) and a plurality of displacement measuring mechanisms (53); the fourth linear motion device (51) is arranged opposite to the mounting surface of the workpiece to be detected, and the fixed end of the fourth linear motion device (51) is fixedly arranged relative to the workbench (1); a through hole is arranged on the mounting surface, and a plurality of second clamping parts (52) and a plurality of displacement measuring mechanisms (53) are arranged on the movable end of the fourth linear motion device (51); the movable end of the fourth linear motion device (51) is extended so that each second clamping part (52) abuts against the side surface of the through hole in the circumferential direction, and the displacement measuring mechanisms (53) abut against different vertex positions of the mounting surface.

8. The flexible detection device for flatness of a rear axle workpiece of a vehicle body according to claim 1, characterized in that: The invention also comprises a plurality of guide assemblies (6), wherein the guide assemblies (6) are arranged on an end surface of the workbench (1) away from the ground, and the guide assemblies (6) are arranged at intervals between the two flatness detection mechanisms (5); each guide assembly (6) further extends upward and outward in a direction away from the workbench (1); and the side surface of the guide assembly (6) is in abutment with or slidably connected to the side surface of the workpiece to be detected.

Images