A special inspection tool for the cone angle of CVT pulley shaft

Abstract

The present invention relates to a special inspection tool for the cone angle of a CVT pulley shaft, which belongs to the technical field of cone angle detection, and includes a mounting frame, wherein the mounting frame is fixedly connected to a fixing member, wherein the fixing member is provided with a first rotating block, wherein the first rotating block is fixedly connected to symmetrically distributed support rods, wherein the symmetrically distributed support rods are slidably connected to a measuring seat, wherein a first micrometer and a second micrometer are fixedly connected to the measuring seat, wherein the first micrometer and the second micrometer are both provided with a first cavity, wherein the first cavity is filled with hydraulic oil, and wherein the probes of the first micrometer and the second micrometer are both fixedly connected with a first sealing ring. The present invention drives the first sealing ring to move by the hydraulic oil in the same cavity, wherein the first sealing ring drives the probes on the first micrometer and the second micrometer to extend, and the pressures on the probes on the two micrometers are made equal by the hydraulic oil, thereby reducing the error caused by the different pressures applied to the probes and improving the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of cone angle detection, and in particular to a special detection tool for the cone angle of a CVT pulley shaft. Background Art

[0002] The CVT pulley shaft is one of the key components in the continuously variable transmission. The transmission squeezes the pulley through the conical surface on the CVT pulley shaft, thereby changing the position of the pulley on the conical surface of the CVT pulley shaft to change speed. Therefore, the conical surface of the CVT pulley shaft requires very high precision to ensure normal use. The prior art can refer to the Chinese utility model patent with authorization announcement number CN217331009U. The above patent detects the cone angle of the workpiece by matching a micrometer, a test bench and a base. The overall structure is simple, the detection is convenient and the cost is low. However, when measuring, it is necessary to use standard parts to return the micrometer to zero. It can only detect whether it is qualified through difference detection, but cannot display the specific value. If multiple different CVT pulley shafts are used When measuring, different standard parts need to be constantly adjusted, which is rather cumbersome. When using a micrometer for measurement, the probe of the micrometer is extended through a spring. When the probe is compressed, the spring is also compressed. The degree of compression is different, and the pressure of the spring on the probe is also different. Since the accuracy and sensitivity of the micrometer are very high, when the pressure is too large, it may cause the probe to bend and cause slight deformation, resulting in degree fluctuations. The above-mentioned utility model patent uses two independent micrometers for measurement, and it is impossible to determine the degree of compression of the micrometer probe. If the two micrometer probes are compressed to different degrees, the degrees of the two micrometers will also change, resulting in measurement errors, affecting the accuracy of the measured cone angle value. Summary of the invention

[0003] In order to overcome the disadvantage that the existing measuring device cannot determine the compression degree of the micrometer probe, if the two micrometer probes are compressed to different degrees, the degrees of the two micrometers will also change, thereby causing measurement errors, the present invention provides a special inspection fixture for the cone angle of a CVT pulley shaft.

[0004] The technical solution is: a special gauge for the cone angle of a CVT pulley shaft, comprising a mounting frame, the mounting frame is fixedly connected to a fixing member, the fixing member is rotatably connected to a rotating seat, the fixing member is provided with a first rotating block, the first rotating block is fixedly connected to symmetrically distributed support rods, the symmetrically distributed support rods are jointly provided with a fixing component on one side away from the first rotating block, the fixing component is used to fix the symmetrically distributed support rods, the symmetrically distributed support rods are jointly slidably connected to a measuring seat, the measuring seat is fixedly connected to a first micrometer and a second micrometer, the first micrometer and the second micrometer A first cavity is opened inside each of the two micrometers, the first cavity is filled with hydraulic oil, first sealing rings are fixedly connected to the probes of the first micrometer and the second micrometer, the first sealing rings are sealingly and slidingly connected to the adjacent first cavities, a connecting pipe is connected between the two first cavities, the connecting pipe is fixedly connected and connected to a mounting shell, the mounting shell is filled with hydraulic oil, a second sealing ring is sealingly and slidingly connected in the mounting shell, a first spring is fixedly connected between the side of the second sealing ring away from the connecting pipe and the mounting shell, and a rotating component for driving the rotating seat to rotate is provided on the mounting frame.

[0005] As a preferred technical solution of the present invention, the rotating assembly includes a motor, the motor is fixedly connected to the mounting frame, the output shaft of the motor is fixedly connected to a second rotating block, the second rotating block is fixedly connected to the rotating seat, a groove is opened in the middle part of the upper side of the second rotating block, the mounting frame is provided with an electric slide rail, the mounting frame is slidably connected to an electric slider through the electric slide rail, the electric slider is rotatably connected to a rubber cone, a control terminal is provided on the mounting frame, the control terminal is electrically connected to the motor, and readers are provided on the dials of the first micrometer and the second micrometer, and the reader is electrically connected to the control terminal.

[0006] As a preferred technical solution of the present invention, the fixing assembly includes a fixing tube, the fixing tube is fixedly connected to the mounting frame, an arc-shaped sealing block is arranged in the fixing tube, a square block is fixedly connected to the arc-shaped sealing block, the arc-shaped sealing block is fixedly connected to the symmetrically distributed support rods through the square blocks, the arc-shaped sealing block is fixedly connected to a hydraulic telescopic rod through the square blocks, the hydraulic telescopic rod is electrically connected to the control terminal, and the telescopic end of the hydraulic telescopic rod is fixedly connected to the measuring seat.

[0007] As a preferred technical solution of the present invention, the measuring seat is provided with symmetrically distributed second cavities, the first cavity and the adjacent second cavity are connected by a pipeline, a sealing plate is sealingly and slidingly connected in the second cavity, a second spring is fixedly connected between the sealing plate and the measuring seat, the second spring is located in the adjacent second cavity, the mounting shell is rotatably connected to a rotating rod, the rotating rod is communicated and cooperated with the connecting pipe, the rotating rod passes through the second sealing ring, and the rotating rod is sealingly and slidingly connected to the second sealing ring.

[0008] As a preferred technical solution of the present invention, the elastic coefficient of the second spring is greater than the elastic coefficient of the first spring.

[0009] As a preferred technical solution of the present invention, a spherical cavity is opened in the middle of the connecting tube, and a hole connected to the mounting shell is opened on the spherical cavity. The end of the rotating rod close to the connecting tube is spherical and is sealed and rotatably connected in the spherical cavity of the connecting tube. A three-way hole is opened at the spherical part of the rotating rod, and the three-way hole is connected to the hole of the spherical cavity of the connecting tube.

[0010] As a preferred technical solution of the present invention, it also includes a gearbox, the gearbox is fixedly connected to the mounting frame, the gearbox is provided with a shift knob, the input end of the gearbox is fixedly connected to a rotating knob, the output end of the gearbox is fixedly connected to an output rod, the output rod is threadedly connected to a limiting sleeve, the limiting sleeve is limitedly and slidably connected to a fixed shell, the fixed shell is fixed to the gearbox, the limiting sleeve is fixedly connected to a limiting rod at one end away from the gearbox, the limiting rod is fixedly connected to a sealing piston, the sealing piston is sealingly and slidably connected to the fixed tube, the fixed tube is sealingly and slidably connected to the arc-shaped sealing block, the fixed tube is filled with hydraulic oil, and the first rotating block and the fixed member are rotationally connected via a rotating shaft.

[0011] As a preferred technical solution of the present invention, the fixed tube is formed by connecting a C-shaped tube and two arc-shaped tubes, and the centers of the two arc-shaped tubes coincide with the center point of the rotating shaft between the first rotating block and the fixed member.

[0012] As a preferred technical solution of the present invention, the cross-sectional areas of the sealing piston and the arc-shaped sealing block are equal.

[0013] As a preferred technical solution of the present invention, the fixed tube is fixedly connected to a first sealing tube and a second sealing tube, the limit rod slides in a sealed manner in the first sealing tube and the second sealing tube, the fixed shell is installed with a displacement sensor, the displacement sensor is used to detect the distance moved by the fixed shell, the displacement sensor is electrically connected to the control terminal, and the limit sleeve is engraved with an arc scale.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention drives the first sealing ring to move through the hydraulic oil in the same cavity, and the first sealing ring drives the probes on the first micrometer and the second micrometer to extend. The hydraulic oil makes the pressures on the probes on the two micrometers equal, thereby reducing the errors caused by the different pressures applied to the probes and improving the measurement accuracy.

[0015] 2. After the two micrometers measure the CVT pulley shaft, the present invention starts the motor to drive the CVT pulley shaft to rotate, and comprehensively measures the conical surface of the CVT pulley shaft. While rotating, the connection between the hydraulic oils in the two micrometers is cut off to prevent the two micrometers from affecting each other.

[0016] 3. The present invention tilts the two dial gauges by rotating the rotary knob through transmission, so that the two dial gauges are parallel to the conical surface of the CVT pulley shaft, which is convenient for detecting CVT pulley shafts of the same specification, and the degree can be directly read through the limit sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the fixing member and the rotating seat of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the first rotating block, the supporting rod and the measuring seat of the present invention;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the first micrometer and the second micrometer of the present invention;

[0021] Figure 5 It is a three-dimensional structural cross-sectional view of the measuring seat of the present invention;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating assembly of the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the second cavity, the sealing plate and the second spring of the present invention;

[0024] Figure 8 A three-dimensional structural cross-sectional view of the mounting shell and the rotating rod of the present invention;

[0025] Fig. 9 It is a three-dimensional structural schematic diagram of the gearbox, the speed change knob and the rotation knob of the present invention;

[0026] Fig.10 It is a three-dimensional structural schematic diagram of the output rod, the limiting sleeve and the fixing shell of the present invention;

[0027] Fig.11It is a three-dimensional structural cross-sectional view of the limiting sleeve and the fixing shell of the present invention.

[0028] The marks in the accompanying drawings are as follows: 1-mounting frame, 11-fixing part, 12-rotating seat, 2-first rotating block, 21-support rod, 22-measuring seat, 23-first micrometer, 24-second micrometer, 25-first cavity, 26-first sealing ring, 27-connecting pipe, 28-mounting shell, 29-second sealing ring, 210-first spring, 3-motor, 31-second rotating block, 32-electric slider, 33-rubber cone, 4-fixing tube, 41-arc sealing block, 42-hydraulic telescopic rod, 5-second cavity, 51-sealing plate, 52-second spring, 53-rotating rod, 6-gearbox, 61-speed shift knob, 62-rotating knob, 63-output rod, 64-limiting sleeve, 65-fixing shell, 66-limiting rod, 67-sealing piston, 68-first sealing tube, 69-second sealing tube, 7-displacement sensor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The existing method indirectly measures the angle of the cone surface by two micrometers. When the micrometer is used for measurement, the probe of the micrometer is extended through the spring. When the probe is compressed, the spring is also compressed. The compression degree is different, and the pressure of the spring on the probe is also different. Since the precision and sensitivity of the micrometer are very high, when the pressure is too large, the probe may bend and cause a slight deformation, resulting in degree fluctuation. The existing device cannot determine the compression degree of the micrometer probe. If the two micrometer probes are compressed to different degrees, the degrees of the two micrometers will also change, thereby generating a measurement error and affecting the accuracy of the cone surface. For this reason, the present invention is improved through the following steps:

[0031] Example 1: A special inspection tool for the cone angle of a CVT pulley shaft, referring to Figure 1-Figure 5 and Figure 7As shown, it includes a mounting frame 1, a fixing member 11 is fixedly connected to the upper part of the mounting frame 1, the fixing member 11 is composed of a missing circular disk and a circular tube, the fixing member 11 is internally rotatably connected to a rotating seat 12, the rotating seat 12 is cylindrical, and a circular chamfer is arranged on the upper side for fixing the CVT pulley shaft, the fixing member 11 is provided with a first rotating block 2, two symmetrically distributed support rods 21 are fixedly connected to the right side of the first rotating block 2, a fixing assembly is commonly arranged on the right side of the two symmetrically distributed support rods 21, the two symmetrically distributed support rods 21 are commonly slidably connected to a measuring seat 22, a first micrometer 23 and a second micrometer 24 are fixedly connected to the measuring seat 22, a connecting line between the first micrometer 23 and the second micrometer 24 passes through the center of the rotating seat 12, a first cavity 25 is provided in the first micrometer 23 and the second micrometer 24, the first cavity 25 is filled with hydraulic oil, the first micrometer 23 and The probes of the second micrometer 24 are fixedly connected with a first sealing ring 26, and the hydraulic oil is located at the lower side of the first sealing ring 26. The first sealing ring 26 is sealingly and slidably connected to the adjacent first cavity 25. A connecting pipe 27 is connected between the left and right first cavities 25. The connecting pipe 27 is fixedly connected and connected to a mounting shell 28. The mounting shell 28 is filled with hydraulic oil. A second sealing ring 29 is sealingly and slidably connected in the mounting shell 28. The hydraulic oil is located at the upper side of the second sealing ring 29. A first spring 210 is fixedly connected between the lower side of the second sealing ring 29 and the mounting shell 28. Initially, the probes on the first micrometer 23 and the second micrometer 24 are contracted and fixed by an external device. The first spring 210 is in a compressed state. The first spring 210 is used to drive the second sealing ring 29 to move upward. The second sealing ring 29 squeezes the adjacent hydraulic oil, and the two probes are driven to extend upward through the transmission of the hydraulic oil. A rotating component for driving the rotating seat 12 to rotate is provided on the mounting frame 1.

[0032] Reference Figure 2 and Figure 6As shown, the rotating assembly includes a motor 3, the motor 3 is fixed to the mounting frame 1, the output shaft of the motor 3 is fixedly connected to the second rotating block 31, the second rotating block 31 is fixedly connected to the rotating seat 12, when in use, the rotational force of the motor 3 is transmitted to the rotating seat 12 through the second rotating block 31, and the CVT pulley shaft is driven to rotate through the rotating seat 12, a groove is provided in the middle of the upper side of the second rotating block 31, which is used to limit the driving CVT pulley shaft so that the CVT pulley shaft is placed vertically, an electric slide rail is provided on the upper side of the mounting frame 1, and the mounting frame 1 An electric slider 32 is slidably connected via an electric slide rail, and the electric slider 32 is rotatably connected to a rubber cone 33, and the rubber cone 33 is used to squeeze the CVT pulley shaft to fix the CVT pulley shaft. The center point of the rubber cone 33 and the center point of the second rotating block 31 are connected perpendicular to the horizontal. A control terminal is provided on the mounting frame 1, and the control terminal is electrically connected to the motor 3. Readers are provided on the dials of the first micrometer 23 and the second micrometer 24, and the reader is electrically connected to the control terminal. The degree is directly displayed through the control terminal for easy observation.

[0033] Reference Figure 2 and Figure 4-Figure 6 As shown, the fixing assembly includes a fixing tube 4, which is fixed to the mounting frame 1, and an arc-shaped sealing block 41 is arranged in the fixing tube 4, which is arranged to be fixed here, and a square block is fixed to the arc-shaped sealing block 41, and the arc-shaped sealing block 41 is fixed to two symmetrically distributed support rods 21 through the square block, and the arc-shaped sealing block 41 is fixed to a hydraulic telescopic rod 42 through the square block, and the hydraulic telescopic rod 42 is electrically connected to the control terminal, and the telescopic end of the hydraulic telescopic rod 42 is fixed to the measuring seat 22, and the hydraulic telescopic rod 42 drives the two micrometers to move through the measuring seat 22, so as to measure more comprehensive data.

[0034] Reference Figure 7 and Figure 8 As shown, the measuring seat 22 is provided with two second cavities 5 which are symmetrically distributed on the left and right sides. The first cavity 25 and the adjacent second cavity 5 are connected by a pipeline. A sealing plate 51 is sealingly and slidably connected in the second cavity 5. A second spring 52 is fixedly connected between the sealing plate 51 and the measuring seat 22. The second spring 52 is located in the adjacent second cavity 5. The second spring 52 is used to drive the adjacent sealing plate 51 to reset. The elastic coefficient of the second spring 52 is greater than the elastic coefficient of the first spring 210. The mounting shell 28 is rotatably connected to a rotating rod 53. The connecting pipe 2 A spherical cavity is provided in the middle of 7, a hole connected with the mounting shell 28 is provided on the upper side of the spherical cavity, the upper end of the rotating rod 53 is spherical, and is sealed and rotatably connected in the spherical cavity of the connecting tube 27, a three-way hole is provided at the spherical part of the rotating rod 53, the three-way hole is connected with the hole of the spherical cavity of the connecting tube 27, the rotating rod 53 is connected and cooperated with the connecting tube 27, the staff controls whether the two ends of the connecting tube 27 are connected by rotating the rotating rod 53, the rotating rod 53 passes through the second sealing ring 29, and the rotating rod 53 is sealed and slidably connected with the second sealing ring 29.

[0035] When using the present device to measure the tapered angle of the CVT pulley shaft, first place the CVT pulley shaft into the rotating seat 12. During the process of placing the CVT pulley shaft, the tapered surface of the CVT pulley shaft faces downward, and the lower side of the CVT pulley shaft enters into the groove on the upper side of the second rotating block 31, so that the CVT pulley shaft is placed vertically. Then the staff starts the electric slider 32, and the electric slider 32 moves downward on the electric slide rail of the mounting frame 1. The electric slider 32 drives the rubber cone 33 to move downward. After the rubber cone 33 drops to contact the CVT pulley shaft, the rubber cone 33 squeezes the CVT pulley shaft to fix the CVT pulley shaft. Then the staff closes the electric slider 32, and the electric slider 32 stops moving.

[0036] Initially, the probes on the first micrometer 23 and the second micrometer 24 are retracted and fixed. After the CVT pulley shaft is fixed, the staff releases the fixation of the probes on the first micrometer 23 and the second micrometer 24, and the first spring 210 is released to squeeze the second sealing ring 29 upward. The second sealing ring 29 squeezes the hydraulic oil in the mounting shell 28, so that the hydraulic oil enters the two first cavities 25 through the connecting pipe 27. The hydraulic oil in the first cavity 25 squeezes the first sealing ring 26, so that the two first sealing rings 26 drive the adjacent probes to move upward. When the probe moves upward, the micrometer starts to measure degrees, and at the same time, the degree data is transmitted to the control terminal through the reader. When the probe contacts the conical surface of the CVT pulley shaft, it stops. The taper of the CVT pulley shaft is calculated by the difference between the degree detections of the two micrometers and the distance between the two micrometer probes. The calculated taper is automatically displayed on the display screen of the control terminal. The two first cavities 25 are connected so that the forces applied upward by the two probes are always equal, thereby preventing errors in the degrees caused by different forces applied by the probes.

[0037] Initially, the connecting pipe 27 is connected to the rotating rod 53. After the control terminal displays the degree of the taper, the staff rotates the rotating rod 53 90 degrees, and blocks the connecting pipe 27 through the ball at the upper end of the rotating rod 53, so that the two first cavities 25 are no longer connected. Then the staff starts the motor 3, and the output shaft of the motor 3 drives the second rotating block 31 to rotate slowly, and the second rotating block 31 drives the CVT pulley shaft to rotate slowly. During the rotation process, the two probes rotate circumferentially around the conical surface of the CVT pulley shaft. When the partial angle of the conical surface of the CVT pulley shaft changes, the corresponding probe will be affected and move up or down. When the probe moves downward, the probe squeezes the hydraulic oil through the adjacent first sealing ring 26, and the hydraulic oil enters the adjacent second cavity 5 through the pipeline, squeezing the sealing plate 51. The sealing plate 51 moves upward to squeeze the second spring 52, and the second spring 52 contracts. At the same time, the movement of the probe will also drive the change of the micrometer degree, and the changed data will be transmitted to the control terminal through the degree, and the curvature of the conical surface of the CVT pulley shaft is detected through the changed data.

[0038] If it is necessary to detect the taper of the CVT pulley shaft at different positions, when the motor 3 is not turned on and the two first cavities 25 are connected to each other, the staff starts the hydraulic telescopic rod 42. The telescopic end of the hydraulic telescopic rod 42 drives the measuring seat 22 to move to the right, changes the lateral position of the two micrometers, and then measures the taper of the CVT pulley shaft at different positions.

[0039] After the measurement is completed, the staff turns off the motor 3, then controls the electric slider 32 to move upward and reset, then takes out the CVT pulley shaft, and finally rotates the rotating rod 53 to reconnect the two first cavities 25, and resets and locks the two probes.

[0040] Example 2: Based on Example 1, refer to Figure 9-11 As shown, the gearbox 6 is also included. The gearbox 6 is fixedly connected to the mounting frame 1. A speed knob 61 is provided on the gearbox 6. The speed knob 61 is used to adjust the transmission ratio of the gearbox 6. A rotating knob 62 is fixedly connected to the input end of the gearbox 6. An output rod 63 is fixedly connected to the output end of the gearbox 6. When the knob 62 is rotated, the rotational force of the rotating knob 62 is transmitted to the output rod 63 through the gearbox 6, so that the output rod 63 rotates. The output rod 63 is threadedly connected to a limiting sleeve 64. The limiting sleeve 64 is limitedly slidably connected to a fixed shell 65. The fixed shell 65 is fixed to the gearbox 6. The fixed shell 65 It is used to limit the rotation of the limit sleeve 64. The lower end of the limit sleeve 64 is fixedly connected to the limit rod 66. The limit rod 66 is fixedly connected to a sealing piston 67. The cross-sectional area of ​​the sealing piston 67 and the arc-shaped sealing block 41 are equal. The sealing piston 67 is sealingly and slidingly connected to the fixed tube 4. The fixed tube 4 is sealingly and slidingly connected to the arc-shaped sealing block 41. The fixed tube 4 is filled with hydraulic oil. The first rotating block 2 and the fixed member 11 are rotatably connected through a rotating shaft. The fixed tube 4 is connected by a C-shaped tube and two arc-shaped tubes. The center of the two arc-shaped tubes coincides with the center point of the rotating shaft between the first rotating block 2 and the fixed member 11.

[0041] Reference Figure 9-11 As shown, the fixed tube 4 is fixedly connected with the first sealing tube 68 and the second sealing tube 69, and the limit rod 66 is sealed and slid in the first sealing tube 68 and the second sealing tube 69. The first sealing tube 68 and the second sealing tube 69 are used to seal the fixed tube 4 to prevent the hydraulic oil in the fixed tube 4 from leaking, and at the same time protect the limit rod 66 to prevent the limit rod 66 from bending and deformation. The fixed shell 65 is installed with a displacement sensor 7, and the displacement sensor 7 is used to detect the moving distance of the fixed shell 65. The displacement sensor 7 is electrically connected to the control terminal. The limit sleeve 64 is engraved with arc scales, which can intuitively indicate the taper.

[0042] When it is necessary to measure the CVT pulley shaft of the same specification, after fixing the CVT pulley shaft to the rotating seat 12, the staff unlocks the probes on the first micrometer 23 and the second micrometer 24, and moves the two probes upward under the action of the first spring 210 to contact the conical surface of the CVT pulley shaft, and then rotates the rotating knob 62. The rotating knob 62 drives the output rod 63 to rotate through the gearbox 6. During the rotation, the output rod 63 drives the limit sleeve 64 to move up and down. The limit sleeve 64 slides up and down in the fixed shell 65. During the movement, the limit sleeve 64 drives the limit rod 66 to move up and down, and the limit rod 66 drives the sealing piston 67 to move upward.

[0043] During the upward movement of the sealing piston 67, the sealing piston 67 drives the hydraulic oil in the fixed tube 4 to move, and the hydraulic oil drives the arc-shaped sealing block 41 to move on the fixed tube 4. The arc-shaped sealing block 41 drives the support rod 21 to rotate around the rotating axis of the first rotating block 2. At the same time, the two support rods 21 drive the measuring seat 22 to rotate, so that the connecting line of the two probes gradually becomes parallel to the conical surface. During this process, the degrees of the first micrometer 23 and the second micrometer 24 gradually become equal, and the operation stops after the degrees of the two micrometers are equal.

[0044] During the upward movement of the sealing piston 67, the arc-shaped sealing block 41 rotates upward. Since the contact area between the sealing piston 67 and the hydraulic oil is equal to the contact area between the arc-shaped sealing block 41 and the hydraulic oil, the distance the sealing piston 67 moves upward is proportional to the rotation angle of the arc-shaped sealing block 41. The distance moved by the limit sleeve 64 shows the taper of the CVT pulley shaft. During the rotation of the rotating knob 62, the transmission ratio of the output rod 63 and the rotating knob 62 is adjusted by rotating the speed knob 61, and the output rod 63 is finely adjusted to improve the adjustment accuracy. At the same time, the displacement sensor 7 detects the movement of the output rod 63 and transmits the movement distance to the control terminal, and the taper of the CVT pulley shaft is reflected by the control terminal.

[0045] When the two micrometers display the same value, the staff rotates the rotating rod 53 to block the connecting pipe 27, and then starts the motor 3. The output shaft of the motor 3 drives the rotating seat 12 and the CVT pulley shaft to rotate through the second rotating block 31. The taper of the CVT pulley shaft is detected by the value change of the probes of the first micrometer 23 and the second micrometer 24 when the CVT pulley shaft rotates. After the detection is completed, the motor 3 is turned off and the fixation of the CVT pulley shaft is released to complete the detection.

[0046] After the inspection is completed and the next CVT pulley shaft needs to be inspected, after fixing the CVT pulley shaft, directly observe whether the values ​​of the first micrometer 23 and the second micrometer 24 are equal, and then directly detect whether the CVT pulley shaft of the same specification is qualified, thereby improving the inspection speed.

[0047] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A special inspection tool for measuring the cone angle of a CVT pulley shaft, comprising a mounting frame (1), wherein the mounting frame (1) is fixedly connected to a fixing member (11), and the fixing member (11) is rotatably connected to a rotating seat (12), wherein: The device further comprises a first rotating block (2), wherein the first rotating block (2) is arranged on one side of the fixing member (11), the first rotating block (2) is fixedly connected to symmetrically distributed support rods (21), a fixing assembly is commonly arranged on a side of the symmetrically distributed support rods (21) away from the first rotating block (2), the fixing assembly is used to fix the symmetrically distributed support rods (21), the symmetrically distributed support rods (21) are commonly slidably connected to a measuring seat (22), a first micrometer (23) and a second micrometer (24) are fixedly connected to the measuring seat (22), the first micrometer (23) and the second micrometer (24) are both provided with a first cavity (25), the first cavity (25) is filled with hydraulic oil, and the measuring seat (22) is fixedly connected to a first micrometer (23) and a second micrometer (24), the first micrometer (23) and the second micrometer (24) are both provided with a first cavity (25), the first cavity (25) is filled with hydraulic oil, and the measuring seat (22) is fixedly connected to a first micrometer (23) and a second micrometer (24), and the first cavity (25) is filled with hydraulic oil. The probes of the first micrometer (23) and the second micrometer (24) are both fixedly connected with a first sealing ring (26), the first sealing ring (26) is sealingly and slidably connected to the adjacent first cavity (25), a connecting pipe (27) is connected between the two first cavities (25), the connecting pipe (27) is fixedly connected to and connected with a mounting shell (28), the mounting shell (28) is filled with hydraulic oil, a second sealing ring (29) is sealingly and slidably connected in the mounting shell (28), a first spring (210) is fixedly connected between the side of the second sealing ring (29) away from the connecting pipe (27) and the mounting shell (28), and a rotating assembly for driving the rotating seat (12) to rotate is provided on the mounting frame (1); The rotating assembly comprises a motor (3), the motor (3) being fixedly connected to the mounting frame (1), the output shaft of the motor (3) being fixedly connected to a second rotating block (31), the second rotating block (31) being fixedly connected to the rotating seat (12), a groove being provided in the middle of the upper side of the second rotating block (31), the mounting frame (1) being provided with an electric slide rail, the mounting frame (1) being slidably connected to an electric slider (32) via the electric slide rail, the electric slider (32) being rotatably connected to a rubber cone (33), a control terminal being provided on the mounting frame (1), the control terminal being electrically connected to the motor (3), and a reader being provided on the dials of the first micrometer (23) and the second micrometer (24), the reader being electrically connected to the control terminal; The fixing assembly comprises a fixing tube (4), the fixing tube (4) being fixedly connected to the mounting frame (1), an arc-shaped sealing block (41) being arranged inside the fixing tube (4), a square block being fixedly connected to the arc-shaped sealing block (41), the arc-shaped sealing block (41) being fixedly connected to the symmetrically distributed support rods (21) via the square block, the arc-shaped sealing block (41) being fixedly connected to a hydraulic telescopic rod (42) via the square block, the hydraulic telescopic rod (42) being electrically connected to a control terminal, and the telescopic end of the hydraulic telescopic rod (42) being fixedly connected to the measuring seat (22).

2. A special inspection tool for measuring the cone angle of a CVT pulley shaft according to claim 1, characterized in that: The measuring seat (22) is provided with symmetrically distributed second cavities (5); the first cavity (25) and the adjacent second cavity (5) are communicated with each other via a pipeline; a sealing plate (51) is sealingly and slidably connected in the second cavity (5); a second spring (52) is fixedly connected between the sealing plate (51) and the measuring seat (22); the second spring (52) is located in the adjacent second cavity (5); a rotating rod (53) is rotatably connected to the mounting shell (28); the rotating rod (53) is communicated and matched with the connecting pipe (27); the rotating rod (53) passes through the second sealing ring (29); and the rotating rod (53) is sealingly and slidably connected to the second sealing ring (29).

3. A special inspection tool for measuring the cone angle of a CVT pulley shaft according to claim 2, characterized in that: The elastic coefficient of the second spring (52) is greater than the elastic coefficient of the first spring (210).

4. A special inspection tool for measuring the cone angle of a CVT pulley shaft according to claim 2, characterized in that: A spherical cavity is provided in the middle of the connecting tube (27), and a hole is provided in the spherical cavity which is connected to the mounting shell (28). One end of the rotating rod (53) close to the connecting tube (27) is spherical and is sealed and rotatably connected in the spherical cavity of the connecting tube (27). A three-way hole is provided at the spherical portion of the rotating rod (53), and the three-way hole is connected to the hole of the spherical cavity of the connecting tube (27).

5. The special inspection tool for measuring the cone angle of a CVT pulley shaft according to claim 1, characterized in that: The invention also comprises a gearbox (6), wherein the gearbox (6) is fixedly connected to the mounting frame (1), a gearshift knob (61) is arranged on the gearbox (6), an input end of the gearbox (6) is fixedly connected to a rotation knob (62), an output end of the gearbox (6) is fixedly connected to an output rod (63), the output rod (63) is threadedly connected to a limiting sleeve (64), the limiting sleeve (64) is limitedly slidably connected to a fixed shell (65), the fixed shell (65) is fixedly connected to the gearbox (6), one end of the limiting sleeve (64) away from the gearbox (6) is fixedly connected to a limiting rod (66), the limiting rod (66) is fixedly connected to a sealing piston (67), the sealing piston (67) is sealingly slidably connected to the fixed pipe (4), the fixed pipe (4) is sealingly slidably connected to the arc-shaped sealing block (41), the fixed pipe (4) is filled with hydraulic oil, and the first rotating block (2) and the fixed member (11) are rotatably connected via a rotating shaft.

6. A special inspection tool for measuring the cone angle of a CVT pulley shaft according to claim 5, characterized in that: The fixed tube (4) is formed by connecting a C-shaped tube and two arc-shaped tubes, and the centers of the two arc-shaped tubes coincide with the center point of the rotating shaft between the first rotating block (2) and the fixed member (11).

7. A special CVT pulley shaft taper angle inspection tool according to claim 5, characterized in that: The cross-sectional areas of the sealing piston (67) and the arc-shaped sealing block (41) are equal.

8. The special inspection tool for measuring the cone angle of a CVT pulley shaft according to claim 5, characterized in that: The fixed tube (4) is fixedly connected to a first sealing tube (68) and a second sealing tube (69); the limit rod (66) slides in a sealed manner in the first sealing tube (68) and the second sealing tube (69); the fixed shell (65) is provided with a displacement sensor (7); the displacement sensor (7) is used to detect the distance moved by the fixed shell (65); the displacement sensor (7) is electrically connected to a control terminal; and the limit sleeve (64) is engraved with arc scales.

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