Pawl detecting and positioning tool

Abstract

The utility model relates to the technical field of automobile part size automatic detection, in particular to a pawl detecting and positioning tool. The pawl detection tool is suitable for detecting the profile tolerance of the parking pawl, the parking pawl comprises a shaft hole part, a main body part connected with the shaft hole part and a pawl part arranged on the first side of the main body part in a protruding mode, and the second side of the main body part is provided with a concave arc edge. The pawl detecting and positioning tool comprises a detecting platen, a part positioning and clamping mechanism and a laser scanner. The part positioning and clamping mechanism is used for fixing the parking pawl to a detection station; the part positioning and clamping mechanism comprises an expansion centering assembly, an orientation mechanism and a clamping mechanism, the expansion centering assembly is used for being connected with the shaft hole part in a sleeving mode and can expand the inner wall of the shaft hole part, and precise centering is achieved; the orientation mechanism can position the reference of the parking pawl in the circumferential direction, and the clamping mechanism is used for clamping and fixing the positioned parking pawl to a detection station; the laser scanner is arranged above the to-be-detected element position of the parking pawl, and the surface profile tolerance of the parking pawl can be rapidly detected. According to the pawl detection positioning tool, the accuracy and the detection efficiency of parking pawl profile tolerance detection can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of automatic detection of automobile part dimensions, and in particular to a pawl detection and positioning tool. Background Art

[0002] The parking pawl cooperates with the parking gear and is widely used in the locking mechanism of the parking system of the automobile transmission. The processing of the parking pawl includes blank parts, machining, heat treatment, grinding and other processes. The combined process leads to large fluctuations in the key parking dimensions. The fluctuations in the key parking dimensions have a significant impact on parking and pose a safety risk. The existing detection method not only has low detection efficiency but also poor reliability. Utility Model Content

[0003] The present application provides a pawl detection and positioning tool, which is convenient and reliable for fixing a parking pawl, and can improve the accuracy and efficiency of detecting the contour of the parking pawl.

[0004] To achieve the above-mentioned purpose, the present application provides a pawl detection and positioning tool, which is suitable for detecting the contour of a parking pawl. The parking pawl includes a shaft hole portion, a main body portion connected to the shaft hole portion, and a pawl portion convexly arranged on a first side of the main body portion. A concave arc edge is arranged on a second side of the main body portion away from the pawl portion. The pawl detection and positioning tool includes:

[0005] Inspection table with inspection stations;

[0006] A parts positioning and clamping mechanism, used to fix the parking pawl to the detection station, the parts positioning and clamping mechanism includes an expansion centering component, an orientation mechanism and a clamping mechanism, the expansion centering component is used for the shaft hole portion to be sleeved and can expand the inner wall of the shaft hole portion to achieve centering; the orientation mechanism is used to locate the reference of the parking pawl in the circumferential direction; the clamping mechanism is used to clamp and fix the positioned parking pawl to the detection station;

[0007] The laser scanner is arranged above the position of the element to be measured of the parking pawl and is used to detect the surface contour of the parking pawl.

[0008] In some embodiments, the expansion centering assembly includes:

[0009] A first positioning base, fixed to the detection table and used to carry the shaft hole portion;

[0010] A centering spindle, which is connected to the first positioning base and the detection platen and is configured to be lifted and slid relative to the first positioning base and the detection platen;

[0011] A centering pressure plate connected to the top end of the centering spindle;

[0012] A driving cylinder is connected to the bottom end of the centering spindle and drives the centering spindle to rise and fall;

[0013] The deformation unit is sleeved on the centering spindle and arranged between the centering pressure plate and the table surface of the first positioning base. When the driving cylinder drives the centering spindle and the centering pressure plate to slide and descend relative to the first positioning base and the detection table, the centering pressure plate squeezes and drives the deformation unit to radially expand and clamp the shaft hole.

[0014] In some embodiments, the orientation mechanism includes a second positioning base, which is arranged at the same height as the table surface of the first positioning base and is used to support the main body. The second positioning base is convexly provided with a C reference ball, and the C reference ball is used to abut against a preset point of the arc edge of the positioning parking pawl.

[0015] In some embodiments, the orientation mechanism includes a coarse limiting ball protruding from the detection table, and the coarse limiting ball and the C reference ball are arranged at a preset distance so that a gap at one end of the main body away from the axial hole portion is arranged between the coarse limiting ball and the C reference ball.

[0016] In some embodiments, the orientation mechanism further includes a pressing assembly, which is used to push the parking pawl to rotate around the expansion centering assembly so that a preset point position of the arc edge of the main body abuts against the C reference ball.

[0017] In some embodiments, the pressing assembly comprises:

[0018] Slide cylinder;

[0019] An elastic guide rod assembly connected to the slide cylinder and driven by the slide cylinder to move toward or away from the parking pawl;

[0020] The reference pressing head is connected to the elastic guide rod assembly and is used to abut against the first side of the main body.

[0021] In some embodiments, a three-point floating support mechanism is provided between the first positioning base and the second positioning base, and the three-point floating support mechanism is used for floatingly supporting the lower surface of the main body.

[0022] In some embodiments, the clamping mechanism includes a clamping clamp and a clamping cylinder. The clamping clamp is hinged to the detection table. The clamping cylinder is used to drive the clamping clamp to rotate toward or away from the upper surface of the shaft hole portion. When the clamping clamp abuts against the upper surface of the shaft hole portion, the parking pawl is clamped and fixed.

[0023] In some embodiments, the detection table is provided with an in-place sensor for detecting whether the parking pawl is placed on the detection table, and the in-place sensor is connected to the control mechanism of the driving cylinder, the sliding cylinder and the clamping cylinder.

[0024] In some embodiments, it also includes a tooling table, the detection table is fixed above the tooling table, the laser scanner is fixed to the tooling table and four groups are arranged along the circumference of the detection table, and the four groups of laser scanners are used to detect the contour of the lower surface edge of the main body, the pawl part and the arc edge.

[0025] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the part positioning and clamping mechanism includes an expansion centering component, an orientation mechanism and a clamping mechanism. When the parking pawl is clamped and positioned, the expansion centering component is used to position the parking pawl. The expansion positioning component forms an interference fit with the axial hole portion of the parking pawl through radial expansion, and the axial hole portion and the parking pawl are tightened and fixed to the detection station of the detection table from the inner circumference of the axial hole portion; the orientation mechanism can position the parking pawl around the expansion centering component along the circumferential direction; the clamping mechanism is used to clamp and fix the positioned parking pawl to the detection station; and the surface contour of the parking pawl is quickly and synchronously detected by means of multiple laser scanners located above the position of the element to be measured of the parking pawl. The above part positioning and clamping mechanism can accurately and conveniently fix and position the parking pawl, thereby improving the accuracy and detection precision of the detection of the parking pawl contour. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0027] In order to more clearly illustrate the embodiments of the present application 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0029] Figure 1 is a structural diagram of the parking pawl to be tested;

[0030] Figure 2 is a top view of a parking pawl to be detected;

[0031] Figure 3 A working principle diagram of the ratchet detection and positioning tooling provided in an embodiment of the present application;

[0032] Figure 4 for Figure 3 Magnified view of the Z part;

[0033] Figure 5 for Figure 3 Schematic diagram of the middle top pressure assembly;

[0034] Figure 6 for Figure 3 A partial cross-sectional view of the central three-point floating support mechanism;

[0035] Figure 7 for Figure 3 Schematic diagram from another perspective.

[0036] Description of reference numerals:

[0037] 010-shaft hole; 011-main body; 012-pawl; 013-arc edge;

[0038] 20-detection table; 21-coarse limit ball; 22-arrival sensor;

[0039] 30-expansion centering assembly; 31-first positioning base; 32-centering pressure plate; 33-driving cylinder;

[0040] 40-second positioning base; 41-C reference ball;

[0041] 50-top pressure assembly; 51-slide cylinder; 52-reference clamping head; 53-clamping connection block; 54-clamping rod; 55-hinge pin; 56-clamping spring; 57-spring pressure block; 58-spring cover; 59-adjusting screw; 510-magnetic switch;

[0042] 60-three-point floating support mechanism; 61-floating mounting shaft; 62-floating support adjustment nut; 63-limiting pin; 64-three-point floating support nail; 65-floating support spring;

[0043] 70-Laser scanner;

[0044] 80-tooling table;

[0045] 90-hold-down clamp. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0048] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0049] In order to solve the technical problems of low efficiency and poor reliability of parking pawl detection in the prior art, the present application provides a pawl detection and positioning tool, which is convenient and reliable for fixing the parking pawl and can improve the reliability and efficiency of the parking pawl contour detection. Figure 1 and Figure 2As shown, the parking pawl mainly includes an axial hole portion 010, a main body portion 011 connected to the axial hole portion 010, and a pawl portion 012 arranged on the first side of the main body portion 011. The second side of the main body portion 011, that is, the side of the main body portion 011 away from the pawl portion 012, is provided with an arc edge 013 concave toward the main body portion 011, and the upper and lower surface edges of the edge of the main body portion 011 are provided with convex ribs, and a strip-shaped process hole is provided on the main body portion 011. The positioning points (surfaces) of the parking pawl in this application mainly include the axial hole portion 010, that is, the first positioning reference, the upper and lower surfaces of the parking pawl and the main body portion 011, that is, the second positioning reference, and the preset point on the arc edge 013, that is, the third positioning reference. The parking pawl is positioned by multiple references to improve the positioning and detection accuracy.

[0050] See also Figures 1 to 4 The embodiment of the present application provides a pawl detection and positioning tool, including a detection table 20, a part positioning and clamping mechanism and a laser scanner 70. The detection table 20 is provided with a detection station for placing the parking pawl to be detected; the part positioning and clamping mechanism is arranged on the detection table 20 and the periphery of the detection table 20, and is used to accurately position and fix the parking pawl to the detection station. The laser scanner 70 is arranged along the periphery of the detection table 20 and is arranged above the position of the element to be detected of the parking pawl, and is used to detect the distance between the preset point on the surface of the parking pawl and the laser scanner 70. The reference value is obtained by detecting the distance between the corresponding point of the parking pawl standard part and the laser scanner 70, and then the distance between the preset point of the parking pawl to be detected and the laser scanner 70 is compared with the reference value. If the difference between the two is within the set range, it indicates that the contour degree at this location meets the requirements. The multiple laser scanners 70 arranged on the periphery of the detection table 20 are used to synchronously detect the contour degree of different positions of the parking pawl to improve the detection efficiency.

[0051] The above-mentioned parts positioning and clamping mechanism includes an expansion centering component 30, an orientation mechanism and a clamping mechanism; the expansion centering component 30 is installed on the detection table 20. The expansion centering component 30 is used for the shaft hole portion 010 of the parking pawl to be set, and the expansion centering component 30 can expand along the radial direction of the shaft hole portion 010 so as to expand and fix the inner wall of the shaft hole portion 010, so as to realize the centering and expansion and fixing of the shaft hole portion 010 and the parking pawl. The orientation mechanism is used to sleeve the expansion centering component 30 with the shaft hole portion 101 of the parking pawl and position it along the circumferential reference of the expansion centering component 30; the clamping mechanism is used to clamp and fix the fully positioned parking pawl to the detection station. The pawl detection and positioning tooling usually also includes a tooling table 80, the detection table 20 is fixed at a preset height above the tooling table 80, and the laser scanner 70 is fixed on the tooling table 80, so that the scanning head of the laser scanner 70 is above the position of the parking pawl to be measured in a fixed position.

[0052] Combined with reference Figure 3 , Figure 4 and Figure 7 The expansion centering assembly 30 includes a first positioning base 31, a centering spindle, a centering pressure plate 32, a driving cylinder 33 and a deformation unit. The first positioning base 31 is fixed to the detection table 20 and is used to carry the shaft hole portion 010, which can carry and position the lower surface of the parking pawl; the centering spindle vertically passes through the positioning base and the detection table 20, and is connected to the driving cylinder 33 located below the detection table 20, so that the centering spindle can be driven by the driving cylinder 33 to move up and down relative to the first positioning base 31 and the detection table 20. The centering pressure plate 32 is connected to the top of the centering spindle, and the deformation unit is sleeved on the centering spindle, and the deformation unit is located between the centering pressure plate 32 and the table surface of the first positioning base 31.

[0053] When the driving cylinder 33 drives the centering spindle and the centering pressure plate 32 to slide downward relative to the first positioning base 31 and the detection plate 20, the extrusion deformation unit (which is sleeved by the shaft hole 010, not shown in the drawings) expands radially, and the deformation unit forms an interference fit with the shaft hole 010, clamping the shaft hole 010 and the parking pawl from the inner wall of the shaft hole 010. The deformation unit can adopt a ball spring structure or a leaf spring structure, and the details can refer to the existing expansion self-centering clamp.

[0054] When using the above-mentioned pawl detection and positioning tooling to position the parking pawl, it is only necessary to connect the parking pawl with the shaft hole portion 010 on the outer periphery of the centering spindle and the deformation unit, and then control the driving cylinder 33 to drive the centering spindle and the centering pressure plate 32 to squeeze the deformation unit downward to tighten and fix the parking pawl and the shaft hole portion 010. The positioning is accurate and convenient, ensuring that the parking pawl standard part and the part to be detected are at the same fixed reference, thereby improving the reliability and detection efficiency of the parking pawl surface contour detection.

[0055] In some embodiments, the orientation mechanism includes a second positioning base 40, which is fixed on the detection table 20 at a preset distance relative to the first positioning base 31. The table surface of the second positioning base 40 and the table surface of the first positioning base 31 are set at the same height. The second positioning base 40 is used to cooperate with the first positioning base 31 to respectively support the lower surface of the positioning body part 011 and the shaft hole part 010, that is, the second positioning base 40 and the first positioning base 31 are used to support the lower surface of the parking pawl. The side of the second positioning base 40 facing the first positioning base 31 is also convexly provided with a C reference ball 41 relative to the second positioning base 40, such as Figure 3As shown, the C reference ball 41 is used to abut the preset point on the arc edge 013 on the second side of the main body 011. When the preset point on the arc edge 013 of the parking pawl abuts against the C reference ball 41, it indicates that the parking pawl is in place on the third reference. At this time, the expansion centering component 30 is driven to expand and fix the shaft hole portion 010 and the parking pawl.

[0056] Furthermore, the orientation mechanism also includes a coarse limiting ball 21, which protrudes relative to the upper surface of the detection table 20 and is located at a preset distance outside the second positioning base 40, and the preset distance is greater than the dimension of the end of the main body 011 away from the shaft hole 010. After the shaft hole 010 is sleeved on the expansion centering assembly 30, the end of the main body 011 away from the shaft hole 010 can be set between the coarse limiting ball 21 and the C reference ball 41, and the main body 011 is roughly limited by the coarse limiting ball 21 and the C reference ball 41, and then the preset point on the second side arc edge 013 of the main body 011 is pressed against the C reference ball 41, and the shaft hole 010 and the parking pawl are expanded and fixed by the expansion centering assembly 30.

[0057] See also Figure 3 and Figure 5 In some embodiments, in order to facilitate driving the parking pawl to abut against the C reference ball 41 at a preset point on the arc edge 013, the orientation mechanism further includes a pressing assembly 50, which is fixed to the tooling table 80 and can move toward or away from the first side of the parking pawl, and is used to push the first side of the main body 011, so that the parking pawl rotates around the expansion centering assembly 30, ensuring that the preset point on the arc edge 013 on the second side of the main body 011 can abut against the C reference ball 41. Specifically, the pressing assembly 50 includes a slide cylinder 51, an elastic guide rod assembly and a reference clamping head 52, the reference clamping head 52 is connected to the end of the elastic guide rod assembly and is used to abut against the first side of the main body 011, and the elastic guide rod assembly is connected to the slide cylinder 51, and the slide cylinder 51 is fixed to the tooling table 80. The slide cylinder 51 drives the elastic guide rod assembly to drive the reference clamping head 52 to move toward or away from the first side of the main body 011. When the reference clamping head 52 moves toward the first side of the main body 011, it drives the parking pawl to rotate around the expansion centering assembly 30 to abut against the C reference ball 41 at a preset point on the arc edge 013. When the reference clamping ball moves away from the first side of the main body 011, the abutment limit on the main body 011 on the third reference is released.

[0058] The structures of the top pressure assembly 50 and the elastic guide rod assembly are as follows: Figure 5As shown, a magnetic switch 510 is provided on one side of the slide cylinder 51, and the magnetic switch 510 is used to detect the movement position of the slide cylinder 51, thereby controlling the movement position of the elastic guide rod assembly and the reference clamping head 52. The slide cylinder 51 is connected to the clamping connection block 53, and the first end of the clamping connection block 53, that is, the end thereof, is slidably provided with a clamping rod 54, and the reference clamping head 52 and the clamping rod 54 are connected by a hinge pin 55, and a strip pin hole for limiting and guiding the hinge pin 55 is provided on the clamping block. A spring cover plate 58 is provided at the second end of the clamping block, and a spring clamping block 57 is provided on the inner side of the spring cover plate 58, and the spring clamping block 57 is connected to the spring cover plate 58 by an adjusting screw 59, and the spacing between the spring clamping block 57 and the spring cover plate 58 can be adjusted by means of the adjusting screw 59, that is, the distance between the spring clamping block 57 and the clamping rod 54 is adjusted, and the clamping spring 56 abuts between the clamping rod 54 and the spring clamping block 57. The setting of the clamping spring 56 provides a certain elastic buffer to prevent the reference clamping head 52 from damaging the surface of the parking pawl or causing the C reference ball 41 to deform when the slide cylinder 51 moves excessively, thereby affecting the positioning detection accuracy.

[0059] In addition, the clamping mechanism includes a clamping clamp 90 and a clamping cylinder. The first end of the clamping clamp 90 is in the shape of a double-headed fork, which is used to be crimped to the upper surface of the shaft hole portion 010. The clamping clamp 90 is hinged to the detection table 20, and the clamping cylinder is hinged to the second end of the clamping clamp 90. The second end of the clamping clamp 90 is driven to rotate by the clamping cylinder, thereby driving the first end of the clamping clamp 90 to rotate toward or away from the upper surface of the shaft hole portion 010. When the clamping clamp 90 rotates until the first end abuts against the upper surface of the shaft hole portion 010, the upper surfaces of the first positioning base 31 and the second positioning base 40 are cooperated to achieve further positioning of the parking pawl in the second reference direction.

[0060] See also Figure 3 and Figure 6The pawl detection and positioning tooling provided in one embodiment of the present application also includes a three-point floating support mechanism 60, which is arranged between the first positioning base 31 and the second positioning base 40, and is used to provide floating support for the lower surface of the main body 011. The three-point floating support mechanism 60 includes a floating mounting shaft 61, a floating support adjustment nut 62, a limit pin 63, a three-point floating support nail 64 and a floating support spring 65. The bottom end of the floating mounting shaft 61 is inserted and limited in the floating support adjustment nut 62, and the floating support spring 65 is compressed and arranged between the floating mounting shaft 61 and the floating support adjustment nut 62. The limit pin 63 serves to connect the three-point floating support nail 64 and the floating mounting shaft 61. When the three-point floating support mechanism 60 is installed on the detection table 20, the height of the three-point floating support nail 64 is equal to or slightly higher than the table height of the first positioning base 31 and the second positioning base 40, so that the three-point floating support nail 64 can provide floating support for the lower surface of the main body 011, and cooperate with the downward pressure of the clamp 90 on the shaft hole 010 to press the lower surface of the parking pawl down to fit the upper surface of the first positioning base 31 and the second positioning base 40. The setting of the three-point floating support mechanism 60 can assist in supporting and positioning the parking pawl when the parking pawl does not abut against the C reference ball 41. The support adjustment structure and principle of the floating support mechanism can also refer to the prior art settings.

[0061] On the basis of the above-mentioned embodiment, the pawl detection and positioning tooling provided in the embodiment of the present application further includes an in-place sensor 22 and a control mechanism. The in-place sensor 22 is arranged above the detection platen 20 and located on one side of the detection station, and the in-place sensor 22 is used to identify whether a parking pawl is placed above the detection platen 20. The control mechanism is connected to the driving cylinder 33, the slide cylinder 51, the clamping cylinder and the laser scanner 70, and is used to control the driving cylinder 33, the slide cylinder 51 and the clamping cylinder to move in a set order.

[0062] Exemplarily, the control mechanism can adopt a PLC controller, and the PLC controller is connected to the in-position sensor 22. When the parking pawl to be detected is placed above the detection table 20 and is sleeved on the expansion centering assembly 30 through the shaft hole portion 010, the in-position sensor 22 detects the parking pawl and feeds back to the PLC controller. When the PLC controller obtains the signal that the parking pawl is above the detection table 20 fed back by the in-position sensor 22, it first controls the slide cylinder 51 to drive the elastic guide rod assembly and the reference clamping head 52 to abut against the first side of the driving body portion 011, so that the parking pawl rotates around the expansion centering assembly 30 to the preset point on the arc edge 013 on the second side of the body portion 011 against the C reference ball 41; then controls the clamping cylinder to drive the clamping clamp 90 to rotate toward the upper surface of the shaft hole portion 010 and presses the parking pawl against the upper surfaces of the first positioning base 31 and the second positioning base 40; finally controls the driving cylinder 33 to move so that the expansion centering assembly 30 clamps the shaft hole portion 010.

[0063] After the parking pawl is clamped in place, the PLC controller controls the laser scanner 70 to detect the surface contour of the parking pawl. If the workpiece is qualified after the inspection, the driving cylinder 33, the slide cylinder 51 and the clamping cylinder are controlled to reset. If the workpiece is unqualified, the slide cylinder 51 and the clamping cylinder are reset, and the driving cylinder 33 is not reset for the time being and is processed according to the unqualified product process. Then the driving cylinder 33 is controlled to reset so as to enter the next parking pawl inspection process.

[0064] In the embodiment of the present application, four groups of laser scanners 70 are arranged along the periphery of the detection table 20, and the four groups of laser scanners 70 are fixed on the tooling table 80 through mounting brackets. The pawl portion 012 includes a left contour, an outer contour, and a right contour. The so-called outer contour refers to the end face contour of the pawl portion 012 away from the main body portion 011, that is, Figure 2 A group of laser scanners 70 is used to detect the left and outer contours of the pawl portion 012, that is, the contour of the A+B area; a group of laser scanners 70 is used to detect the outer contour and right contour of the pawl portion 012, that is, the contour of the B+C area; a group of laser scanners 70 is used to detect the contour of the arc edge 013, that is, the contour of the D area; the last group of laser scanners 70 is used to detect the contour of the chamfer of the edge rib of the lower surface of the main body 011, that is, the contour corresponding to the E area. The specific detection positions can be referred to in the attached Figure 2 The arrow points to the area. In the present application, four groups of laser scanners 70 are used to synchronously detect the contours of the lower surface edge of the main body 011 of the parking pawl, the pawl portion 012, and the arc edge 013, thereby improving the detection efficiency and detection reliability.

[0065] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0066] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0067] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A pawl detection and positioning tool, suitable for detecting the contour of a parking pawl, wherein the parking pawl comprises a shaft hole portion, a main body portion connected to the shaft hole portion, and a pawl portion convexly arranged on a first side of the main body portion, and a concave arc edge is arranged on a second side of the main body portion away from the pawl portion, characterized in that: The ratchet detection and positioning tooling comprises: Inspection table with inspection stations; A parts positioning and clamping mechanism, used to fix the parking pawl to the detection station, the parts positioning and clamping mechanism includes an expansion centering component, an orientation mechanism and a clamping mechanism, the expansion centering component is used for the shaft hole portion to be sleeved and can expand the inner wall of the shaft hole portion to achieve centering; the orientation mechanism is used to locate the reference of the parking pawl in the circumferential direction; the clamping mechanism is used to clamp and fix the positioned parking pawl to the detection station; The laser scanner is arranged above the position of the element to be measured of the parking pawl and is used to detect the surface contour of the parking pawl.

2. The ratchet detection and positioning tooling according to claim 1, characterized in that: The expansion centering assembly comprises: A first positioning base, fixed to the detection table and used to carry the shaft hole portion; A centering spindle, which is connected to the first positioning base and the detection platen and is configured to be lifted and slid relative to the first positioning base and the detection platen; A centering pressure plate connected to the top end of the centering spindle; A driving cylinder is connected to the bottom end of the centering spindle and drives the centering spindle to rise and fall; The deformation unit is sleeved on the centering spindle and arranged between the centering pressure plate and the table surface of the first positioning base. When the driving cylinder drives the centering spindle and the centering pressure plate to slide and descend relative to the first positioning base and the detection table, the centering pressure plate squeezes and drives the deformation unit to radially expand and clamp the shaft hole.

3. The ratchet detection and positioning tool according to claim 2, characterized in that: The orientation mechanism includes a second positioning base, which is arranged at the same height as the table surface of the first positioning base and is used to support the main body. The second positioning base is convexly provided with a C reference ball, and the C reference ball is used to abut against a preset point of the arc edge of the positioning parking pawl.

4. The ratchet detection and positioning tool according to claim 3, characterized in that: The orientation mechanism includes a coarse limiting ball protruding from the detection table, and the coarse limiting ball and the C reference ball are arranged at a preset interval so that a gap is set between the coarse limiting ball and the C reference ball at one end of the main body away from the shaft hole.

5. The pawl detection and positioning tool according to claim 3, characterized in that: The orientation mechanism also includes a pressing component, which is used to push the parking pawl to rotate around the expansion centering component so that the preset point position of the arc edge of the main body abuts against the C reference ball.

6. The pawl detection and positioning tool according to claim 5, characterized in that: The top pressure assembly comprises: Slide cylinder; An elastic guide rod assembly connected to the slide cylinder and driven by the slide cylinder to move toward or away from the parking pawl; The reference pressing head is connected to the elastic guide rod assembly and is used to abut against the first side of the main body.

7. The ratchet detection and positioning tool according to any one of claims 3 to 6, characterized in that: A three-point floating support mechanism is provided between the first positioning base and the second positioning base, and the three-point floating support mechanism is used for floatingly supporting the lower surface of the main body.

8. The pawl detection and positioning tool according to claim 6, characterized in that: The clamping mechanism includes a clamping clamp and a clamping cylinder. The clamping clamp is hinged to the detection table. The clamping cylinder is used to drive the clamping clamp to rotate toward or away from the upper surface of the shaft hole portion. When the clamping clamp abuts against the upper surface of the shaft hole portion, the parking pawl is clamped and fixed.

9. The pawl detection and positioning tool according to claim 8, characterized in that: The detection table is provided with an in-place sensor for detecting whether the parking pawl is placed on the detection table. The in-place sensor is connected to the control mechanism of the driving cylinder, the sliding cylinder and the clamping cylinder.

10. The ratchet detection and positioning tool according to claim 1, characterized in that: It also includes a tooling table, the detection table is fixed above the tooling table, the laser scanner is fixed to the tooling table and four groups are arranged along the circumference of the detection table, the four groups of laser scanners are used to detect the contour of the lower surface edge of the main body, the pawl part and the arc edge.

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