Comprehensive detector for transmission connecting rod and parallelism tolerance detection method

Abstract

The invention discloses a comprehensive detector for a transmission connecting rod and a parallelism tolerance detection method. The comprehensive detector comprises a detection platform, an X-direction adjusting device, a Y-direction adjusting device, a Z-direction adjusting device, a detection device and a positioning device, and the X-direction adjusting device is installed on one side of the upper surface of the detection platform; the Z-direction adjusting device is vertically arranged on the top of the X-direction adjusting device, the Y-direction adjusting device is horizontally arranged on the Z-direction adjusting device, the detection device is installed on the Y-direction adjusting device, the positioning device is arranged on one side of the X-direction adjusting device and located on the lower side of the detection device, and a transmission connecting rod to be detected is fastened on the top of the positioning device. The positioning device drives the to-be-detected transmission connecting rod to rotate so that the detection device can conveniently collect multiple angle data of the to-be-detected transmission connecting rod. A one-time clamping mode is adopted, the transmission connecting rod to be detected is fastened on the pin shaft and the driven shaft, the driven shaft is driven to rotate through the gear sleeve, the detection device collects data of multiple angles, and the detection efficiency and the detection accuracy of the transmission connecting rod to be detected are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical measurement, and in particular to a comprehensive detector for a transmission connecting rod and a parallelism tolerance detection method. Background Art

[0002] As an important transmission part in the mechanical transmission system, the stability and accuracy of the performance of the transmission connecting rod have an important impact on the overall performance of the mechanical equipment. Therefore, to detect whether the transmission connecting rod is qualified, it is usually necessary to test the aperture of the large and small end holes, the center distance between the two holes, the parallelism of the two holes, the cylindricity and roundness of the holes, the verticality of the center line of the holes, and the surface roughness. At present, manual measurement is generally used for the detection of transmission connecting rods. During manual measurement, the staff needs to use multiple measuring devices. During the measurement process, measurement errors are easily caused by the staff's mistakes, or the coordination of multiple measuring devices causes measurement errors. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a comprehensive tester for a transmission connecting rod. The transmission connecting rod to be tested is fastened to the centering shaft and the driven shaft in a one-time clamping mode, and the driven shaft is driven to rotate by a gear sleeve. The detection device collects data from multiple angles, thereby improving the detection efficiency and accuracy of the transmission connecting rod to be tested.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a comprehensive detector for a transmission connecting rod, comprising a detection platform, an X-direction adjustment device, a Y-direction adjustment device, a Z-direction adjustment device, a detection device and a positioning device, wherein the X-direction adjustment device is installed on one side of the upper surface of the detection platform; the Z-direction adjustment device is vertically arranged on the top of the X-direction adjustment device and can move horizontally along the X-direction adjustment device, the Y-direction adjustment device is horizontally arranged on the Z-direction adjustment device, the Y-direction adjustment device is perpendicular to the Z-direction adjustment device and the X-direction adjustment device, the Y-direction adjustment device can move up and down along the Z-direction adjustment device, the detection device is installed on the Y-direction adjustment device, the detection device moves horizontally along the Y-direction adjustment device, the positioning device is arranged on one side of the X-direction adjustment device and is located at the lower side of the detection device, the transmission connecting rod to be tested is fastened to the top of the positioning device, and the positioning device drives the transmission connecting rod to be tested to rotate so that the detection device can collect data of multiple angles of the transmission connecting rod to be tested.

[0005] Preferably, the detection platform includes a first support plate, a second support plate, a support column and a support base, support columns are installed at the four corners of the top of the second support plate, and the two end portions of each support column along the length direction are fixedly connected to the second support plate and the first support plate respectively, and support bases are installed at the four corners of the bottom of the second support plate.

[0006] Preferably, the X-axis adjustment device includes an X-axis slider, a first guide rail, a first support plate, a second support plate, an X-axis lead screw, a first motor and a first coupling, the number of the first support plate and the second support plate are both two, the two first support plates are arranged in parallel along the length direction, the two second support plates are respectively located at the two end portions of the first support plate along the length direction, the two ends of each second support plate along the length direction are respectively connected to the ends of the two opposing first support plates to form a rectangular structure, the top of each first support plate is installed with a first guide rail along the length direction, the length of the first guide rail is consistent with the length of the first support plate, the first motor is located on the outer side of the second support plate, the output shaft of the first motor passes through the second support plate and is connected to the X-axis lead screw through the first coupling, the end of the X-axis lead screw away from the first coupling horizontally passes through the bottom of the X-axis slider and is rotatably connected to the second support plate, the bottom of the X-axis slider is threadedly connected to the X-axis lead screw, and the left and right sides of the X-axis slider are both embedded in the guide rail groove of the first guide rail to facilitate the horizontal movement of the X-axis slider along the first guide rail.

[0007] Preferably, the Z-axis adjustment device comprises a Z-axis sliding block, a second guide rail, a third support plate, a top plate, a Z-axis lead screw, a second motor, a second coupling and a bottom plate, wherein the number of the third support plates is three, and the three third support plates are connected along the length direction to form a U-shaped frame, the end of the U-shaped frame along the length direction is connected to the top plate, and the end of the U-shaped frame away from the top plate is connected to the bottom plate, and the bottom plate is located between two third support plates facing each other, and the number of the second guide rails is two, and the two second guide rails are respectively installed on the third support plates on the left and right sides of the bottom plate along the length direction, the Z-axis lead screw is arranged along the length direction of the third support plate, the output shaft of the second motor passes through the top plate and is connected to the Z-axis lead screw through the second coupling, the end of the Z-axis lead screw away from the second coupling is rotatably connected to the bottom plate, the Z-axis lead screw is vertically arranged, the bottom of the Z-axis sliding block is threadedly connected to the Z-axis lead screw, and both ends of the Z-axis sliding block along the length direction are embedded in the second guide rail for easy movement up and down along the second guide rail.

[0008] Preferably, the Y-axis adjustment device comprises a Y-axis sliding block, a third guide rail, a fourth support plate, a first side plate, a Y-axis lead screw, a third motor, a third coupling and a second side plate, wherein the fourth support plates are three in number, and the three fourth support plates are connected along the length direction to form a U-shaped frame, and the end of the U-shaped frame along the length direction is connected to the first side plate, and the end of the U-shaped frame away from the first side plate is connected to the second side plate, and the second side plate is installed between the two vertical ends of the U-shaped frame. The third guide rails are two in number, and the two third guide rails are respectively installed at the ends of the vertical ends of the U-shaped frame, and the third motor passes through the first side plate and is connected to the Y-axis lead screw through the third coupling, and the end of the Y-axis lead screw away from the third coupling passes through the Y-axis sliding block and is rotatably connected to the second side plate, and the Y-axis sliding block is horizontally arranged, and both sides of the Y-axis sliding block are respectively embedded in the sliding grooves of the third guide rails to facilitate the movement of the Y-axis sliding block along the third guide rail.

[0009] Preferably, the detection device includes a connecting plate, a handle, a connecting block, a flat key, a rotating shaft, a measuring needle and a probe connecting piece. The connecting plate is a rectangular plate and is arranged horizontally. The end of the connecting plate along the length direction is connected to the Y-axis adjustment device. The handle is installed on the side wall of the connecting plate away from the end of the Y-axis adjustment device. The probe connecting piece is connected to the handle and is perpendicular to the connecting plate. The connecting block is embedded in the end of the probe connecting piece away from the handle. The rotating shaft horizontally passes through the probe connecting piece and the connecting block. The part of the rotating shaft located outside the probe connecting piece fixes the position of the rotating shaft and the probe connecting piece by a nut. The top of the probe passes vertically upward through the rotating shaft and is connected to the rotating shaft by a flat key.

[0010] Preferably, the positioning device includes a centering shaft, a gear sleeve, a driven shaft, a pin shaft, a bearing end cover, a gasket, a driving gear, a reducer, a fourth motor and a housing. The bottom of the centering shaft is fixed on the detection platform. The gear sleeve is a U-shaped structure. The vertical end of the gear sleeve is sleeved on the end of the centering shaft away from the detection platform. The gear sleeve and the centering shaft are connected through bearings and sleeves to ensure that the rotation center line of the gear sleeve is coaxial with the center line of the centering shaft. The lateral end of the gear sleeve is threadedly connected to the driven shaft along the horizontal direction. The lateral end of the gear sleeve is located on the side of the gear sleeve away from the housing. The bearing end cover is located on the gear sleeve. The top of the vertical end of the wheel sleeve is connected to the gear sleeve by a screw thread, the pin shaft is arranged at the top of the centering shaft and is connected to the centering shaft by a screw thread, a distance is left between the pin shaft and the driven shaft, the driven shaft moves left and right along the length direction of the lateral end of the gear sleeve, the shell is located on one side of the centering shaft, the reducer and the fourth motor are both located in the shell, the reducer is connected to the output shaft of the fourth motor, the output shaft of the reducer is connected to the driving gear to drive the driving gear to rotate, the driving gear is meshed with the gear teeth of the gear sleeve, the gasket is arranged on the top of the driving gear, and the shell is fixed on the detection platform.

[0011] The present invention also discloses a method for detecting the parallelism tolerance of a transmission connecting rod using a comprehensive detector for the transmission connecting rod, comprising the following steps:

[0012] Step S1: measuring the aperture of the transmission connecting rod to be tested, and determining the aperture error of the transmission connecting rod to be tested;

[0013] Step S2: Based on step S1, the hole distance of the transmission connecting rod to be tested is measured to determine the distance between the center lines of the two holes of the transmission connecting rod to be tested;

[0014] Step S3: Based on step S1 and step S2, the cylindricity of the two holes of the transmission connecting rod to be measured is measured to determine the cylindricity errors of the two holes of the transmission connecting rod to be measured;

[0015] Step S4: If the cylindrical error detection of the two holes in step S3 is qualified, the parallelism error of the center lines of the two holes of the transmission connecting rod to be tested is measured to determine whether the parallelism error of the transmission connecting rod to be tested is qualified.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention adopts a one-time clamping mode to fasten the transmission connecting rod to be tested on the centering shaft and the driven shaft, drives the driven shaft to rotate through the gear sleeve, and the detection device collects data from multiple angles, thereby improving the detection efficiency and accuracy of the transmission connecting rod to be tested.

[0018] 2. The present invention installs the detection device on the Y-axis adjustment device, and realizes the movement of the detection device through the cooperation of the X-axis adjustment device and the Z-axis adjustment device, thereby improving the movement accuracy of the detection device and the detection efficiency.

[0019] 3. The positioning device of the present invention can realize the 360° rotation of the transmission connecting rod to be tested around its reference axis, so that the detection device can collect the parallelism error of the axis of the measured hole relative to the reference axis in any direction within 360°, ensuring the accurate measurement of the parallelism error of the axis to the axis in any direction.

[0020] 4. The present invention can measure multiple data such as the hole diameter, hole spacing, single hole cylindricity, and two-hole parallelism of the transmission connecting rod by clamping once, thereby improving the measurement efficiency.

[0021] 5. The transmission connecting rod detection and positioning device adopted by the present invention has an adjustable hole distance between two holes, and is suitable for detecting connecting rods with different hole distances.

[0022] 6. The transmission connecting rod detection and positioning device used in the present invention has an aperture connected by replaceable bushings with different outer diameters, and is suitable for detecting connecting rods with various aperture sizes.

[0023] The present invention is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the connection relationship between the Y-direction adjustment device and the Z-direction adjustment device of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the positioning device of the present invention;

[0027] Figure 4 for Figure 3 A cross-sectional view of

[0028] Figure 5 for Figure 1 Schematic diagram of the structure enlarged at point A in the middle.

[0029] Description of reference numerals:

[0030] 1—X-direction adjusting device; 101—X-direction connecting plate; 102—first U-shaped guide rail;

[0031] 103—first support plate; 104—second support plate; 105—X-axis lead screw;

[0032] 106—first motor; 107—first coupling; 2—Y-axis adjustment device;

[0033] 201—Y-axis connecting plate; 202—third U-shaped guide rail; 203—fourth supporting plate;

[0034] 204—first side plate; 205—Y-axis lead screw; 206—third motor;

[0035] 207—third coupling; 208—second side plate; 3—Z-direction adjustment device;

[0036] 301—Z-direction connecting plate; 302—second U-shaped guide rail; 303—third supporting plate;

[0037] 304—top plate; 305—Z-direction lead screw; 306—second motor;

[0038] 307—second coupling; 308—bottom plate; 4—connecting plate;

[0039] 5—handle; 6—detection device; 601—connection block;

[0040] 602—Flat key; 603—Rotating shaft; 604—Measuring needle;

[0041] 605—probe connector; 7—positioning device; 701—centering shaft;

[0042] 702—gear sleeve; 703—driven shaft; 704—pin shaft;

[0043] 705—bearing end cover; 706—gasket; 707—driving gear;

[0044] 708—reducer; 709—fourth motor; 710—housing;

[0045] 8—detection platform; 801—first support plate; 802—second support plate;

[0046] 803—support column; 804—support base; 9—transmission connecting rod to be tested. DETAILED DESCRIPTION

[0047] like Figure 1 , Figure 2 As shown, the present invention includes a detection platform 8, an X-axis adjustment device 1, a Y-axis adjustment device 2, a Z-axis adjustment device 3, a detection device 6 and a positioning device 7. The X-axis adjustment device 1 is installed on one side of the upper surface of the detection platform 8; the Z-axis adjustment device 3 is vertically arranged on the top of the X-axis adjustment device 1 and can move horizontally along the X-axis adjustment device 1, the Y-axis adjustment device 2 is horizontally arranged on the Z-axis adjustment device 3, the Y-axis adjustment device 2 is perpendicular to the Z-axis adjustment device 3 and the X-axis adjustment device 1, the Y-axis adjustment device 2 can move up and down along the Z-axis adjustment device 3, the detection device 6 is installed on the Y-axis adjustment device 2, the detection device 6 moves horizontally along the Y-axis adjustment device 2, the positioning device 7 is arranged on one side of the X-axis adjustment device 1 and is located at the lower side of the detection device 6, the top of the positioning device 7 is fastened with a transmission connecting rod 9 to be tested, and the positioning device 7 drives the transmission connecting rod 9 to be tested to rotate so that the detection device 6 can collect data of multiple angles of the transmission connecting rod 9 to be tested.

[0048] In this embodiment, the detection platform 8 is located at the bottom, the X-axis adjustment device 1 is located on the detection platform 8, the Z-axis adjustment device 3 is vertically installed on the X-axis adjustment device 1, and the Z-axis adjustment device 3 moves horizontally along the X-axis adjustment device 1 under the drive of the X-axis adjustment device 1 to adjust the position of the detection device 6 in the X-axis direction. The Y-axis adjustment device 2 is horizontally installed on the Z-axis adjustment device 3, and the Y-axis adjustment device 2 is perpendicular to the Z-axis adjustment device 3. At the same time, the Y-axis adjustment device 2 is perpendicular to the X-axis adjustment device 1, and the Y-axis adjustment device 2 moves up and down along the height direction of the Z-axis adjustment device 3 to adjust the position of the detection device 6 in the height direction. The detection device 6 is horizontally installed on the Y-axis adjustment device 2, and under the drive of the Y-axis adjustment device 2 The detection device 6 is moved along the Y-axis direction to adjust the position of the detection device 6 in the Y-axis direction. The transmission connecting rod 9 to be tested is fastened to the positioning device 7. The positioning device 7 is installed on the detection platform 8, and the positioning device 7 is located on one side of the X-direction adjustment device 1. The positioning device 7 drives the transmission connecting rod 9 to be tested to rotate a certain angle. Based on the detection position of the transmission connecting rod 9 to be tested, the X-direction adjustment device 1, the Y-direction adjustment device 2 and the Z-direction adjustment device 3 are driven to move, so that the detection device 6 located on the Y-direction adjustment device 2 is adjusted to the position to be detected. When the measuring needle 604 of the detection device 6 reaches the preset measuring needle contact force, the sensor of the detection device 6 issues a stop movement instruction to the X-direction adjustment device 1, the Y-direction adjustment device 2 and the Z-direction adjustment device 3.

[0049] like Figure 1 As shown, the detection platform 8 includes a first support plate 801, a second support plate 802, a support column 803 and a support base 804. Support columns 803 are installed at the four corners of the top of the second support plate 802. The two end portions of each support column 803 along the length direction are fixedly connected to the second support plate 802 and the first support plate 801 respectively. Support bases 804 are installed at the four corners of the bottom of the second support plate 802.

[0050] In this embodiment, the number of support columns 803 and support bases 804 are both 4, the top and bottom of each support column 803 are flat, the support column 803 is a cylindrical or rectangular structure, and the bottom of the support base 804 is a circular structure, which increases the contact area between the support base 804 and the ground and improves the stability of the detection platform 8. The top of the support base 804 is threadedly connected to the second support plate 802, the first support plate 801 and the second support plate 802 are the same size, and support bases 804 are provided at the four corners of the bottom of the second support plate 802, and the second support plate is supported upward by four support bases 804 802, the four support bases 804 are adjusted to the same height so that the second support plate 802 is in a horizontal state, and the four corners of the top of the second support plate 802 are fixedly connected with support columns 803, and the four support columns 803 are perpendicular to the second support plate 802. The four support columns 803 have the same height and the tops of the four support columns 803 are fixedly connected to the four corners of the bottom of the first support plate 801. Since the four support columns 803 have the same height, the first support plate 801 is horizontal, so that the X-axis adjustment device 1 and the positioning device 7 on the top of the first support plate 801 remain in a horizontal state, thereby improving the detection accuracy of the detection device 6.

[0051] Furthermore, the support column 803 and the support base 804 are retractable structures, which facilitates the adjustment of the height of the first support plate 801 , that is, the adjustment of the height of the detection platform 8 .

[0052] like Figure 1 As shown, the X-axis adjustment device 1 includes an X-axis slider 101, a first guide rail 102, a first support plate 103, a second support plate 104, an X-axis lead screw 105, a first motor 106 and a first coupling 107. The number of the first support plate 103 and the second support plate 104 are both two. The two first support plates 103 are arranged in parallel along the length direction. The two second support plates 104 are respectively located at the two end portions of the first support plate 103 along the length direction. The two ends of each second support plate 104 along the length direction are respectively connected to the ends of the two opposite first support plates 103 to form a rectangular structure. The top of each first support plate 103 is installed along the length direction. The first guide rail 102, the length of the first guide rail 102 is consistent with the length of the first support plate 103, the first motor 106 is located on the outside of the second support plate 104, the output shaft of the first motor 106 passes through the second support plate 104 and is connected to the X-axis lead screw 105 through the first coupling 107, the end of the X-axis lead screw 105 away from the first coupling 107 horizontally passes through the bottom of the X-axis slider 101 and is rotatably connected to the second support plate 104, the bottom of the X-axis slider 101 is threadedly connected to the X-axis lead screw 105, and the left and right sides of the X-axis slider 101 are embedded in the guide rail groove of the first guide rail 102 to facilitate the horizontal movement of the X-axis slider 101 along the first guide rail 102.

[0053] In this embodiment, the lengths of the two first support plates 103 are smaller than the length of the first support plate 801, the lengths of the two second support plates 104 are consistent with the distance between the two first support plates 103 facing each other, the second support plates 104 are fastened to the two end portions of the two first support plates 103 facing each other by screws, forming a square structure with an open top, the length of the first guide rail 102 is the same as the length of the first support plate 103, the top of each first support plate 103 is installed with a first guide rail 102, the two end portions of the first guide rail 102 along the length direction are respectively tightly attached to the inner side walls of the two second support plates 104, a threaded hole is provided at the bottom of the X-axis slider 101 to facilitate the X-axis lead screw 105 to pass through the X-axis slider 101, and the output shaft of the first motor 106 passes through the second support plate 104 and is connected to the X-axis through the first coupling 107. The end of the lead screw 105 is tightly connected, and the end of the X-axis lead screw 105 away from the first coupling 107 passes through the threaded hole of the X-axis slider 101 and is rotatably connected to the second support plate 104 away from the first motor 106. When the X-axis lead screw 105 is in a horizontal state, the X-axis slider 101 threadedly connected to the X-axis lead screw 105 can move in the horizontal direction, that is, the X-axis lead screw 105 can drive the X-axis slider 101 to move in the horizontal direction. The length of the X-axis slider 101 is the farthest distance between the two opposing first support plates 103, so that both sides of the X-axis slider 101 are embedded in the slide groove of the first guide rail 102, and the Z-axis adjustment device 3 is supported upward by the X-axis slider 101. The movement direction of the X-axis slider 101 is limited by the two opposing first guide rails 102, so that the X-axis slider 101 always moves in the direction of the X-axis lead screw 105. Start the first motor 106. If the output shaft of the first motor 106 rotates clockwise, the first motor 106 drives the X-axis lead screw 105 to rotate clockwise, and the X-axis slider 101 moves along the X-axis lead screw 105 in a direction away from the first motor 106, and the detection device 6 on the Y-axis adjustment device 2 moves synchronously in a direction away from the first motor 106; if the output shaft of the first motor 106 rotates counterclockwise, the first motor 106 drives the X-axis lead screw 105 to rotate counterclockwise, and the X-axis slider 101 moves along the X-axis lead screw 105 in a direction close to the first motor 106, and the detection device 6 on the Y-axis adjustment device 2 moves synchronously in a direction close to the first motor 106; the position adjustment of the detection device 6 in the X-axis direction is achieved through the forward and reverse rotation of the first motor 106.

[0054] like Figure 1 , Figure 2As shown, the Z-axis adjustment device 3 includes a Z-axis slider 301, a second guide rail 302, a third support plate 303, a top plate 304, a Z-axis lead screw 305, a second motor 306, a second coupling 307 and a bottom plate 308. The number of the third support plates 303 is three, and the three third support plates 303 are connected along the length direction to form a U-shaped frame. The end of the U-shaped frame along the length direction is connected to the top plate 304, and the end of the U-shaped frame away from the top plate 304 is connected to the bottom plate 308. The bottom plate 308 is located between the two third support plates 303 facing each other. The number of the second guide rails 302 is two, and the two second guide rails 302 are respectively installed on the third support plate 303 on the left and right sides of the base plate 308 along the length direction, the Z-axis lead screw 305 is arranged along the length direction of the third support plate 303, the output shaft of the second motor 306 passes through the top plate 304 and is connected to the Z-axis lead screw 305 through the second coupling 307, the end of the Z-axis lead screw 305 away from the second coupling 307 is rotatably connected to the base plate 308, the Z-axis lead screw 305 is vertically arranged, the bottom of the Z-axis slider 301 is threadedly connected to the Z-axis lead screw 305, and both ends of the Z-axis slider 301 along the length direction are embedded in the second guide rail 302 for easy movement up and down along the second guide rail 302.

[0055] In this embodiment, the three third support plates 303 are fastened and connected along the length direction to form a U-shaped frame, the length of the U-shaped frame is consistent with the length of the third support plates 303, the width of the lateral end of the U-shaped frame is consistent with the height of the vertical end of the U-shaped frame, the top plate 304 is a square plate, the inner side wall of the top plate 304 is fastened and connected to the end of the U-shaped frame along the length direction, the bottom plate 308 is arranged at the end of the U-shaped frame away from the top plate 304, the bottom plate 308 is located in the middle of the lateral end of the U-shaped frame, a through hole is provided on the bottom plate 308, and the second guide rail 302 is fastened At the end of the vertical end of the U-shaped frame, the length of the second guide rail 302 is consistent with the length of the third support plate 303, the bottom of the Z-direction slider 301 is threadedly connected to the Z-direction lead screw 305, the output shaft of the second motor 306 passes through the top plate 304 and is connected to the Z-direction lead screw 305 through the second coupling 307, the end of the Z-direction lead screw 305 away from the second motor 306 passes through the Z-direction slider 301 and is rotatably connected to the bottom plate 308, the Z-direction lead screw 305 is perpendicular to the horizontal plane, and both sides of the bottom of the Z-direction slider 301 are embedded in the vertical plane of the U-shaped frame. The Z-direction slider 301 is moved along the second guide rail 302 in the sliding groove of the second guide rail 302 at the end portion of the U-shaped frame; the bottom and the bottom plate 308 of the U-shaped frame along the length direction are fastened to the top of the X-direction slider 101, and the third support plate 303 of the U-shaped frame is perpendicular to the X-direction slider 101 along the length direction; the second motor 306 is started, and if the output shaft of the second motor 306 rotates clockwise, the Z-direction lead screw 305 rotates clockwise, and the Z-direction slider 301 threadedly connected to the Z-direction lead screw 305 moves in the direction away from the second motor 306. When the Z-axis slider 301 moves downward, the detection device 6 on the Y-axis adjusting device 2 moves downward synchronously; if the output shaft of the second motor 306 rotates counterclockwise, the Z-axis lead screw 305 rotates counterclockwise, and the Z-axis slider 301 threadedly connected with the Z-axis lead screw 305 moves toward the direction close to the second motor 306, that is, the Z-axis slider 301 moves upward, and the detection device 6 on the Y-axis adjusting device 2 moves upward synchronously; the position of the detection device 6 in the vertical direction can be adjusted by the forward and reverse rotation of the second motor 306.

[0056] like Figure 1 , Figure 2As shown, the Y-axis adjustment device 2 includes a Y-axis slider 201, a third guide rail 202, a fourth support plate 203, a first side plate 204, a Y-axis lead screw 205, a third motor 206, a third coupling 207 and a second side plate 208. The number of the fourth support plates 203 is three, and the three fourth support plates 203 are connected along the length direction to form a U-shaped frame. The end of the U-shaped frame along the length direction is connected to the first side plate 204, and the end of the U-shaped frame away from the first side plate 204 is connected to the second side plate 208. The second side plate 208 is installed on both sides of the U-shaped frame. There are two third guide rails 202 between the vertical ends. The two third guide rails 202 are respectively installed at the ends of the vertical ends of the U-shaped frame. The third motor 206 passes through the first side plate 204 and is connected to the Y-axis lead screw 205 through the third coupling 207. The end of the Y-axis lead screw 205 away from the third coupling 207 passes through the Y-axis slider 201 and is rotatably connected to the second side plate 208. The Y-axis slider 201 is horizontally arranged, and both sides of the Y-axis slider 201 are respectively embedded in the slide grooves of the third guide rails 202 to facilitate the movement of the Y-axis slider 201 along the third guide rails 202.

[0057] In this embodiment, the three fourth support plates 203 are fastened and connected along the length direction to form a U-shaped frame, the length of the U-shaped frame is consistent with the length of the fourth support plate 203, the width of the lateral end of the U-shaped frame is consistent with the height of the vertical end of the U-shaped frame, the first side plate 204 is a square plate, the inner side wall of the first side plate 204 is fastened and connected to the end of the U-shaped frame along the length direction, the second side plate 208 is installed at the end of the U-shaped frame away from the first side plate 204, and the second side plate 208 is fastened to the U-shaped frame The second side plate 208 is provided with a through hole, the third guide rail 202 is fastened to the end of the vertical end of the U-shaped frame, the length of the third guide rail 202 is consistent with the length of the fourth support plate 203, the output shaft of the third motor 206 passes through the first side plate 204 and is connected to the Y-direction lead screw 205 through the third coupling 207, the end of the Y-direction lead screw 205 away from the third motor 206 passes through the Y-direction slider 201 and is rotatably connected to the second side plate 209, so that the Y-direction lead screw 205 always remains horizontal State, both sides of the bottom of the Y-axis slider 201 are embedded in the sliding groove of the third guide rail 202, so that the Y-axis slider 201 moves along the third guide rail 202, and the side of the Y-axis slider 201 away from the Y-axis lead screw 205 is tightly connected to the detection device 6; start the third motor 206, if the output shaft of the third motor 206 rotates clockwise, the Y-axis lead screw 205 rotates clockwise, and the Y-axis slider 201 threadedly connected to the Y-axis lead screw 205 moves in a direction away from the third motor 206, then the detection device 6 on the Y-axis adjustment device 2 moves synchronously in a direction close to the positioning device 7; if the output shaft of the third motor 206 rotates counterclockwise, the Y-axis lead screw 205 rotates counterclockwise, and the Y-axis slider 201 threadedly connected to the Y-axis lead screw 205 moves in a direction close to the third motor 206, then the detection device 6 on the Y-axis adjustment device 2 moves synchronously in a direction close to the X-axis adjustment device 1; through the forward and reverse rotation of the third motor 206, the position adjustment of the detection device 6 in the Y-axis direction can be achieved.

[0058] like Figure 1 , Figure 5 As shown, the detection device 6 includes a connecting plate 4, a handle 5, a connecting block 601, a flat key 602, a rotating shaft 603, a measuring needle 604 and a probe connecting piece 605. The connecting plate 4 is a rectangular plate and is horizontally arranged. The end of the connecting plate 4 along the length direction is connected to the Y-axis adjustment device 2. The handle 5 is installed on the side wall of the connecting plate 4 away from the end of the Y-axis adjustment device 2. The probe connecting piece 605 is connected to the handle 5 and is perpendicular to the connecting plate 4. The connecting block 601 is embedded in the end of the probe connecting piece 605 away from the handle 5. The rotating shaft 603 horizontally passes through the probe connecting piece 605 and the connecting block 601. The part of the rotating shaft 603 located outside the probe connecting piece 605 fixes the position of the rotating shaft 603 and the probe connecting piece 605 through a nut. The top of the probe 604 vertically passes through the rotating shaft 603 upward and is connected to the rotating shaft 603 through the flat key 602.

[0059] In this embodiment, the connecting plate 4 is horizontally arranged, and the end of the connecting plate 4 along the length direction is fastened to the Y-axis slider 201 by screws. The handle 5 is a connecting locking device and is fixedly installed at the end of the connecting plate 4 away from the Y-axis slider 201. The handle 5 can be used to connect probe connectors 605 of different specifications and models to achieve the connection of various specifications and models of measuring needles 604. The probe connector 605 is a cylindrical structure. The top of the probe connector 605 along the length direction is fixedly connected to the handle 5 by a flange and screws. The connecting block 601 is an inverted U-shaped structure. The end of the connecting block 601 is embedded in the end of the probe connector 605 away from the handle 5, so that the bottom of the U-shaped structure of the connecting block 601 is tightly attached to the bottom end surface of the probe connector 605 and fixedly connected by screws. A keyway is provided in the middle of the rotating shaft 603, and the rotating shaft 603 passes through the connecting block 60 1 is rotatably connected with the connecting block 601, the keyway of the rotating shaft 603 is located between the two vertical ends of the connecting block 601, the top of the measuring needle 604 is provided with a through hole that can rotatably cooperate with the rotating shaft 603, the top of the measuring needle 604 is placed between the two vertical ends of the connecting block 601, the rotating shaft 603 is passed through the right side wall of the connecting block 601, the top through hole of the measuring needle 604, and the left side wall of the connecting block 601 in sequence, and then fixed with a nut, the top through hole of the measuring needle 604 is provided with a keyway, the keyway of the rotating shaft 603 corresponds to the keyway of the top through hole of the measuring needle 604 and is fixedly connected by the flat key 602, so that the measuring needle 604 drives the rotating shaft 603 to rotate around the connecting block 601 after being hit by an external force, so as to protect the measuring needle 604 from being damaged. During normal measurement, the measuring needle 604 does not rotate.

[0060] like Figure 1 , Figure 3 and Figure 4As shown, the positioning device 7 includes a centering shaft 701, a gear sleeve 702, a driven shaft 703, a pin 704, a bearing end cover 705, a gasket 706, a driving gear 707, a reducer 708, a fourth motor 709 and a housing 710. The bottom of the centering shaft 701 is fixed on the detection platform 8. The gear sleeve 702 is a U-shaped structure. The vertical end of the gear sleeve 702 is rotatably sleeved on the cylindrical shaft end of the centering shaft 701 away from the detection platform 8 through a bearing. The gear sleeve 702 The gear sleeve 702 is connected to the centering shaft 701 through a bearing and a sleeve to ensure that the rotation center line of the gear sleeve 702 is coaxial with the center line of the centering shaft 701 and can rotate flexibly. The horizontal end of the gear sleeve 702 is provided with a strip hole in the same radial direction as the center line of the gear sleeve 702. The driven shaft 703 passes through the strip hole and is fixedly connected with a nut. A through hole is provided in the middle of the bearing end cover 705 and passes through the end of the centering shaft 701 to rotate and seal with it through an O-ring. The flange end of the bearing end cover 705 is connected to the gear sleeve 702. The top of the vertical end of the wheel sleeve 702 fits and is connected to the gear sleeve 702 by screw threads, the pin shaft 704 is arranged at the top of the centering shaft 701 and is connected to the centering shaft 701 by screw threads, the distance between the driven shaft 703 and the pin shaft 704 is set according to the hole spacing of the two holes of the transmission connecting rod to be tested, the driven shaft 703 can be moved left and right along the strip hole in the length direction of the lateral end of the gear sleeve 702 according to the hole spacing requirements and then locked and fixed, the housing 710 is located on one side of the centering shaft 701, the reducer 708 and the fourth motor 709 are both located in the housing 710, the reducer 708 is connected to the output shaft of the fourth motor 709, the output shaft of the reducer 708 is connected to the driving gear 707 to drive the driving gear 707 to rotate, the driving gear 707 is meshed with the gear teeth of the gear sleeve 702, the gasket 706 is arranged at the top of the driving gear 707 and the driving gear 707 is fixedly connected to the output shaft of the reducer 708 by screws, and the housing 710 is fixed on the detection platform 8.

[0061] In this embodiment, the centering shaft 701 is a cylindrical structure, the bottom of the centering shaft 701 is connected to the first support plate 801 by screw threads, a gear sleeve 702 is sleeved on the centering shaft 701, and the rotation center line of the gear sleeve 702 is coaxial with the center line of the centering shaft 701, the gear sleeve 702 is parallel to the axis of the driven shaft 703, the distance between the driven shaft 703 and the pin shaft 704 is set according to the hole spacing of the two holes of the transmission connecting rod to be tested, and the driven shaft 703 can be moved left and right along the strip hole in the length direction of the lateral end of the gear sleeve 702 according to the hole spacing requirements and then locked and fixed; the test hole of the transmission connecting rod 9 to be tested is fastened to the driven shaft 703, and the bearing end cover 705 and the gear sleeve 702 are connected by screw threads. The thread connection facilitates the synchronous rotation of the bearing end cover 705 and the gear sleeve 702 around the centering shaft 701. The top of the centering shaft 701 is fastened to the pin 704 by screws, so that the center line of the pin 704 is coaxial with the center line of the centering shaft 701. The reference hole of the transmission connecting rod 9 to be tested is sleeved on the pin 704, so that the center line of the pin 704, the center line of the centering shaft 701, and the rotation center line of the gear sleeve 702 are coaxial with the center line of the reference hole of the transmission connecting rod 9 to be tested; the housing 710 is installed on the side of the centering shaft 701 close to the X-direction adjustment device 1, the bottom of the housing 710 is threadedly connected to the first support plate 801 by screws, and the driving gear 707 is installed on the top of the housing 710 and The output shaft of the reducer 708 is connected by a flat key. The upper end of the driving gear 707 is fastened to the gasket 706 and the output shaft of the reducer 708 by a screw to prevent the driving gear 707 from moving upward. The fourth motor 709 drives the reducer 708 to drive the driving gear 707 to rotate. The gear teeth at the lower end of the gear sleeve 702 are meshed with the driving gear 707. Therefore, the driving gear 707 drives the gear sleeve 702 to rotate. The upper end of the gear sleeve 702 is fastened to the driven shaft 703. The driven shaft 703 can be adjusted left and right along the length direction of the lateral end of the gear sleeve 702, so as to be suitable for the transmission connecting rod 9 to be tested with different hole pitches. The holes at both ends of the transmission connecting rod 9 to be tested are respectively sleeved on the pin 704 and On the driven shaft 703, the position of the pin shaft 704 is fixed, and the driven shaft 703 connected to the gear sleeve 702 drives the transmission connecting rod 9 to be tested to rotate around the center line of the centering shaft 701 to any angle, so that the measuring needle 604 can measure the corresponding position of the transmission connecting rod 9 to be tested. According to actual measurement needs, through the drive of the active gear 707, the gear sleeve 702 rotates the transmission connecting rod 9 to be tested around its center axis to any angle, and the corresponding data of each angle are collected by the measuring needle 604 respectively, and then the collected multiple groups of data are analyzed by computer software to obtain the parallelism error of the transmission connecting rod 9 to be tested, and analyze and judge whether the accuracy meets the requirements, thereby judging whether the transmission connecting rod 9 to be tested is qualified.

[0062] The driven shaft 703 and the pin shaft 704 realize comprehensive detection of the dimensional tolerances such as the aperture and center distance of the transmission connecting rod 9 to be tested, as well as the geometric tolerances such as the roundness, cylindricity, and parallelism of the center lines of the two holes. Firstly, the center of the centering shaft 701 is taken as the origin in the X and Y directions, and the upper end surface of the pin shaft 704 is taken as the origin in the Z direction. The reference hole of the transmission connecting rod 9 to be tested is sleeved with the pin shaft 704 for positioning, and the measured hole of the transmission connecting rod 9 to be tested is sleeved with the driven shaft 703. Then, according to the measured element, the driving gear 707 drives the gear sleeve 702 to rotate, and the gear sleeve 702 drives the transmission connecting rod 9 to be tested to rotate to any angle position, then the transmission connecting rod 9 to be tested is sleeved. The three-dimensional coordinates of the center of the measured hole are determined, and the movement distances of the X-axis adjustment device 1, the Y-axis adjustment device 2 and the Z-axis adjustment device 3 are controlled according to the coordinate parameters of the measured hole of the transmission connecting rod 9 to be measured. Through linkage, the measuring needle 604 is adjusted to move into the measured hole for measurement and data collection, and the measured data is analyzed by computer software; if it is necessary to detect other data of the transmission connecting rod 9 to be measured, the position of the detection device 6 is adjusted through the mutual cooperation of the X-axis adjustment device 1, the Y-axis adjustment device 2 and the Z-axis adjustment device 3, without moving the transmission connecting rod 9 to be measured, thereby improving the accuracy of the detection data and the detection efficiency.

[0063] The height of the driven shaft 703 and the pin 704 that are sleeved in the hole of the transmission connecting rod 9 to be tested should be less than or equal to 1 / 2 of the height of the hole itself; according to the diameter of the hole of the transmission connecting rod 9 to be tested, the driven shaft 703 and the pin 704 of the same diameter are selected.

[0064] The method for detecting the parallelism tolerance of the transmission connecting rod by a comprehensive detector comprises the following steps:

[0065] Step S1, measuring the aperture of the transmission connecting rod 9 to be tested, and determining the aperture error of the transmission connecting rod 9 to be tested;

[0066] Move the measuring needle 604 into the reference hole of the transmission connecting rod 9 to be tested, and make the measuring needle 604 perpendicular to the measured surface, collect the coordinates of three points at the Z1 height of the Z axis, fit a circle with a diameter of Φ1 and a center of O1, then move the height of the measuring needle 604, collect the coordinates of three points at the Z2 height, fit a circle with a diameter of Φ2 and a center of O2, then collect the coordinates of three points at the Z3 height, fit a circle with a diameter of Φ3 and a center of O3, and transmit the collected coordinates at the three heights of Z1, Z2, and Z3 to the computer, and calculate the aperture error value of the reference hole of the transmission connecting rod 9 to be tested through computer software; the aperture measurement method of the hole to be tested of the transmission connecting rod 9 to be tested is the same as the aperture measurement method of the reference hole, and fit circles with diameters of Φ4, Φ5, and Φ6 and centers of O4, O5, and O6 respectively at Z4, Z5, and Z6, and calculate the aperture error value of the hole to be tested of the transmission connecting rod 9 to be tested through computer software.

[0067] Step S2: Based on step S1, the hole distance of the transmission connecting rod 9 to be tested is measured to determine the distance between the center lines of the two holes of the transmission connecting rod 9 to be tested;

[0068] The center points O1, O2, and O3 in the aperture measurement are fitted with the center line L1 of the reference hole of the transmission connecting rod 9 to be tested by computer software, and the center points O4, O5, and O6 are fitted with the center line L2 of the hole to be tested of the transmission connecting rod 9 to be tested. The distance between the center lines of the two holes L1 and L2 is evaluated by computer software analysis, that is, the actual hole distance between the two holes of the transmission connecting rod 9 to be tested.

[0069] Step S3, based on step S1 and step S2, measuring the cylindricity of the two holes of the transmission connecting rod 9 to be measured, and determining the cylindricity errors of the two holes of the transmission connecting rod 9 to be measured;

[0070] Through the hole diameter measurement and hole distance measurement, the cylinder is fitted according to the fitted circle and the center of the circle using computer software; the cylindrical surface of the reference hole of the transmission connecting rod 9 to be tested is recorded as cylindrical surface 1, and the cylindrical surface of the hole to be tested of the transmission connecting rod 9 to be tested is recorded as cylindrical surface 2. The radius difference between the two coaxial ideal cylindrical surfaces that can envelop the actual cylindrical surface to be tested is the cylindricality error value, which is recorded as f1 and f2 respectively. When the actually measured cylindricality errors f1 and f2 are respectively less than or equal to the cylindricality tolerance required by the design, the cylindricality errors of the two holes of the connecting rod are qualified.

[0071] Step S4: If the cylindrical error detection of the two holes in step S3 is qualified, the parallelism error of the center lines of the two holes of the transmission connecting rod 9 to be tested is measured to determine whether the parallelism error of the transmission connecting rod 9 to be tested is qualified.

[0072] The axis of the reference hole of the transmission connecting rod 9 to be tested is the reference element of the parallelism error, and the axis of the hole to be tested is the element to be tested. The parallelism error of the axis of the hole to be tested to the axis of the reference hole is detected. The transmission connecting rod 9 to be tested is rotated to any angle 1 position, and the center line of the reference hole of the transmission connecting rod 9 to be tested is taken as the reference line A. Three different heights are respectively taken in the hole to be tested of the transmission connecting rod 9 to be tested, and three points are taken at each height to generate a center point. The three center points are fitted to the measured axis L3. The computer software is used to analyze that the parallelism error value of the center axis L3 of the hole to be tested of the transmission connecting rod 9 to be tested relative to the reference line A is f3. Similarly, the transmission connecting rod 9 to be tested is rotated to any angle 2, any angle 3...any angle 10, and the above operations are repeated to obtain the parallelism error values ​​of the center line of the hole to be tested of the transmission connecting rod 9 to be tested, which are f4, f5...f10. The final parallelism error is evaluated by taking the maximum parallelism error value from f3 to f10 as the final parallelism error value. If this parallelism error value is less than or equal to the parallelism tolerance required by the design, the parallelism error of the axis of the transmission connecting rod 9 to be tested is qualified, otherwise it is unqualified.

[0073] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A comprehensive detector for a transmission connecting rod, characterized in that: The invention comprises a detection platform (8), an X-direction adjustment device (1), a Y-direction adjustment device (2), a Z-direction adjustment device (3), a detection device (6) and a positioning device (7), wherein the X-direction adjustment device (1) is installed on one side of the upper surface of the detection platform (8); the Z-direction adjustment device (3) is vertically arranged on the top of the X-direction adjustment device (1) and can move horizontally along the X-direction adjustment device (1); the Y-direction adjustment device (2) is horizontally arranged on the Z-direction adjustment device (3); the Y-direction adjustment device (2) is parallel to the Z-direction adjustment device (3) and the X-direction adjustment device (1). The Y-axis adjusting device (2) is vertically movable along the Z-axis adjusting device (3); the detection device (6) is mounted on the Y-axis adjusting device (2); the detection device (6) is horizontally movable along the Y-axis adjusting device (2); the positioning device (7) is disposed on one side of the X-axis adjusting device (1) and is located at the lower side of the detection device (6); the top of the positioning device (7) is fastened to the transmission connecting rod (9) to be tested; the positioning device (7) drives the transmission connecting rod (9) to be tested to rotate, so that the detection device (6) can collect data of multiple angles of the transmission connecting rod (9) to be tested.

2. A comprehensive detector for a transmission connecting rod according to claim 1, characterized in that: The detection platform (8) comprises a first support plate (801), a second support plate (802), a support column (803) and a support base (804); support columns (803) are installed at the four corners of the top of the second support plate (802); both ends of each support column (803) along the length direction are fixedly connected to the second support plate (802) and the first support plate (801) respectively; and support bases (804) are installed at the four corners of the bottom of the second support plate (802).

3. A comprehensive detector for a transmission connecting rod according to claim 1, characterized in that: The X-axis adjustment device (1) comprises an X-axis slider (101), a first guide rail (102), a first support plate (103), a second support plate (104), an X-axis lead screw (105), a first motor (106) and a first coupling (107); the first support plate (103) and the second support plate (104) are both provided in two numbers; the two first support plates (103) are arranged in parallel along the length direction; the two second support plates (104) are respectively located at the two end portions of the first support plate (103) along the length direction; the two ends of each second support plate (104) along the length direction are respectively connected to the ends of the two first support plates (103) facing each other to form a rectangular structure; the top of each first support plate (103) is provided with a first guide rail ( 102), the length of the first guide rail (102) is consistent with the length of the first support plate (103), the first motor (106) is located on the outer side of the second support plate (104), the output shaft of the first motor (106) passes through the second support plate (104) and is connected to the X-axis lead screw (105) through the first coupling (107), the end of the X-axis lead screw (105) away from the first coupling (107) horizontally passes through the bottom of the X-axis slider (101) and is rotatably connected to the second support plate (104), the bottom of the X-axis slider (101) is threadedly connected to the X-axis lead screw (105), and the left and right sides of the X-axis slider (101) are both embedded in the guide rail groove of the first guide rail (102) to facilitate the X-axis slider (101) to move horizontally along the first guide rail (102).

4. A comprehensive detector for a transmission connecting rod according to claim 1, characterized in that: The Z-direction adjustment device (3) comprises a Z-direction slider (301), a second guide rail (302), a third support plate (303), a top plate (304), a Z-direction lead screw (305), a second motor (306), a second coupling (307) and a bottom plate (308); the number of the third support plates (303) is three, and the three third support plates (303) are connected along the length direction to form a U-shaped frame; the end of the U-shaped frame along the length direction is connected to the top plate (304), and the end of the U-shaped frame away from the top plate (304) is connected to the bottom plate (308); the bottom plate (308) is located between two third support plates (303) facing each other; the number of the second guide rails (302) is two, and the two second guide rails ( The Z-direction lead screw (305) is respectively installed on the third support plate (303) on the left and right sides of the bottom plate (308) along the length direction, the Z-direction lead screw (305) is arranged along the length direction of the third support plate (303), the output shaft of the second motor (306) passes through the top plate (304) and is connected to the Z-direction lead screw (305) through the second coupling (307), the end of the Z-direction lead screw (305) away from the second coupling (307) is rotatably connected to the bottom plate (308), the Z-direction lead screw (305) is arranged vertically, the bottom of the Z-direction slider (301) is threadedly connected to the Z-direction lead screw (305), and both ends of the Z-direction slider (301) along the length direction are embedded in the second guide rail (302) to facilitate up and down movement along the second guide rail (302).

5. A comprehensive detector for a transmission connecting rod according to claim 1, characterized in that: The Y-axis adjustment device (2) comprises a Y-axis slider (201), a third guide rail (202), a fourth support plate (203), a first side plate (204), a Y-axis lead screw (205), a third motor (206), a third coupling (207) and a second side plate (208); the number of the fourth support plates (203) is three, the three fourth support plates (203) are connected along the length direction to form a U-shaped frame, the end of the U-shaped frame along the length direction is connected to the first side plate (204), the end of the U-shaped frame away from the first side plate (204) is connected to the second side plate (208), and the second side plate (208) is installed at two ends of the U-shaped frame. The number of the third guide rails (202) is two, and the two third guide rails (202) are respectively installed at the ends of the vertical ends of the U-shaped frame. The third motor (206) passes through the first side plate (204) and is connected to the Y-direction lead screw (205) through the third coupling (207). The end of the Y-direction lead screw (205) away from the third coupling (207) passes through the Y-direction slider (201) and is rotationally connected to the second side plate (208). The Y-direction slider (201) is horizontally arranged, and the two sides of the Y-direction slider (201) are respectively embedded in the sliding grooves of the third guide rails (202) to facilitate the Y-direction slider (201) to move along the third guide rails (202).

6. A comprehensive detector for a transmission connecting rod according to claim 1, characterized in that: The detection device (6) comprises a connecting plate (4), a handle (5), a connecting block (601), a flat key (602), a rotating shaft (603), a measuring needle (604) and a measuring head connecting piece (605); the connecting plate (4) is a rectangular plate and is arranged horizontally; the end of the connecting plate (4) along the length direction is connected to the Y-direction adjustment device (2); the handle (5) is installed on the side wall of the connecting plate (4) away from the end of the Y-direction adjustment device (2); the measuring head connecting piece (605) is connected to the handle (5) and to the connecting plate (4) are perpendicular to each other, the connecting block (601) is embedded in the end of the probe connecting member (605) away from the handle (5), the rotating shaft (603) horizontally passes through the probe connecting member (605) and the connecting block (601), the part of the rotating shaft (603) located outside the probe connecting member (605) is fixed to the position of the rotating shaft (603) and the probe connecting member (605) by a nut, and the top of the probe (604) vertically passes through the rotating shaft (603) upwards and is connected to the rotating shaft (603) by a flat key (602).

7. A comprehensive detector for a transmission connecting rod according to claim 1, characterized in that: The positioning device (7) comprises a centering shaft (701), a gear sleeve (702), a driven shaft (703), a pin shaft (704), a bearing end cover (705), a gasket (706), a driving gear (707), a reducer (708), a fourth motor (709) and a housing (710). The bottom of the centering shaft (701) is fixed on the detection platform (8). The gear sleeve (702) is a ￢-shaped structure. The vertical end of the gear sleeve (702) is sleeved on the centering shaft. (701) is located at an end away from the detection platform (8), the gear sleeve (702) is connected to the centering shaft (701) through a bearing and a sleeve to ensure that the rotation center line of the gear sleeve (702) is coaxial with the center line of the centering shaft (701), the end of the lateral end of the gear sleeve (702) along the horizontal direction is threadedly connected to the driven shaft (703), the lateral end of the gear sleeve (702) is located on the side of the gear sleeve (702) away from the housing (710), and the bearing end cover (705) is located The gear sleeve (702) is disposed at the top of the vertical end thereof and is connected to the gear sleeve (702) by screw threads. The pin shaft (704) is disposed at the top of the centering shaft (701) and is connected to the centering shaft (701) by screw threads. A distance is left between the pin shaft (704) and the driven shaft (703). The driven shaft (703) moves left and right along the length direction of the lateral end of the gear sleeve (702). The housing (710) is located on one side of the centering shaft (701). The reducer (708) ) and the fourth motor (709) are both located in the housing (710); the reducer (708) is connected to the output shaft of the fourth motor (709); the output shaft of the reducer (708) is connected to the driving gear (707) to drive the driving gear (707) to rotate; the driving gear (707) is meshed with the gear teeth of the gear sleeve (702); the gasket (706) is arranged on the top of the driving gear (707); and the housing (710) is fixed on the detection platform (8).

8. A method for detecting the parallelism tolerance of a transmission connecting rod using a comprehensive detector for a transmission connecting rod according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1: measuring the aperture of the transmission connecting rod (9) to be tested, and determining the aperture error of the transmission connecting rod (9) to be tested; Step S2: Based on step S1, the hole distance of the transmission connecting rod (9) to be tested is measured to determine the distance between the center lines of the two holes of the transmission connecting rod (9) to be tested; Step S3: Based on step S1 and step S2, the cylindricity of the two holes of the transmission connecting rod (9) to be tested is measured to determine the cylindricity errors of the two holes of the transmission connecting rod (9) to be tested; Step S4: If the cylindrical error detection of the two holes in step S3 is qualified, the parallelism error of the center lines of the two holes of the transmission connecting rod (9) to be tested is measured to determine whether the parallelism error of the transmission connecting rod (9) to be tested is qualified.

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