A measuring device for the positional tolerance between the end face tooth mounting hole and the ear hole

Abstract

The present invention relates to the technical field of measuring instruments, in particular to a measuring device for the positional tolerance between the end face tooth mounting hole and the ear hole, which comprises a bottom plate and an end face tooth mounting hole inspection mechanism, a first dial indicator mechanism, and a second dial indicator mechanism mounted on the bottom plate; in the end face tooth mounting hole inspection mechanism, the rotating base shaft of the end face tooth mounting hole inspection tool is mounted in a bearing sleeve through a bearing and can rotate circumferentially. In the first dial indicator mechanism, the first dial indicator rod of the first dial indicator horizontally slides relative to the workpiece on the end face tooth mounting hole inspection tool in the left-right direction through a first guide rail and a first slider. In the second dial indicator mechanism, the second dial indicator rod of the second dial indicator horizontally slides relative to the workpiece on the end face tooth mounting hole inspection tool in the left-right direction through a second guide rail and a second slider. The present invention can reduce the number of clamping operations, shorten the measurement time, reduce human errors, lower the risk of accidental collision, and reduce the work intensity of employees.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and in particular to a measuring device for the positional tolerance between the end face tooth mounting holes and the ear holes. Background Art

[0002] The flange fork is an important component of the universal coupling. Taking the most common cross-axis universal coupling as an example, through the connection between the flange forks, two shafts that are not on the same axis and have an axis angle can achieve continuous rotation, and reliably transmit torque and motion. Therefore, the machining accuracy of the flange fork directly affects the performance and service life of the universal coupling.

[0003] The end face tooth flange fork is a type of flange fork, mainly used in the automotive transmission system. After machining the ear holes and mounting holes on its left and right sides, it is necessary to measure the front-back positional tolerance and symmetry error between the left and right ear holes and the mounting holes. The measurement process is as follows: Place the workpiece on the bottom plate at the mounting hole position, position it with the workpiece mounting hole, install the dial indicator of the measuring device on the slider, move the upper dial indicator slider, and measure the difference between two sets of values on the sides of the left and right ear holes of the workpiece, which is the front-back positional tolerance between the ear holes and the mounting holes of the workpiece; then move the dial indicator slider so that the slider contacts the stop block, measure the positional tolerance value on the inner side of the ear hole, after the workpiece is flipped 180 degrees, move the dial indicator slider again, and measure the positional tolerance value on the inner side of the other ear hole. The difference between the two values is the symmetry error between the left and right ear holes and the mounting holes of the workpiece. The defects of this measuring device are: 1. The measurement time is long, and the workpiece needs to be clamped twice; 2. During the clamping process, due to the small space between the workpiece and the dial indicator, interference will occur. In case the dial indicator is touched, it needs to be re-measured, resulting in an increase in the measurement time; 3. Due to the multiple clamping times, the secondary positioning error is increased, affecting the measurement accuracy; 4. The probability of accidentally touching the dial indicator during the two clamping processes is increased; 5. Due to the heavy weight of the workpiece, the measurement intensity of the employees is increased, and human errors are inevitable. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above background art, and provide a measuring device for the positional tolerance between the end face tooth mounting holes and the ear holes, which can reduce the clamping times, shorten the measurement time, reduce human errors, reduce the risk of accidental touch, and reduce the work intensity of employees.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A measuring device for the positional tolerance between the end face tooth mounting holes and the ear holes, comprising a bottom plate and an end face tooth mounting hole inspection mechanism, a first dial indicator mechanism, and a second dial indicator mechanism mounted on the bottom plate;

[0007] The end face tooth mounting hole inspection tool mechanism includes: a bearing sleeve vertically installed in the middle of the bottom plate, a rotating base shaft installed in the bearing sleeve through a bearing, a calibration block fixed at the upper end of the rotating base shaft and having a calibration plane, and an end face tooth mounting hole inspection tool horizontally fixed on the top of the calibration block;

[0008] The first dial indicator mechanism includes: a height cushion block fixed on the right side of the bottom plate, a guide rail mounting block fixed on the top of the height cushion block, a first guide rail horizontally installed on the top surface of the guide rail mounting block in the left-right direction, a first slider slidably fitted on the first guide rail, a first connecting plate horizontally fixed on the top of the first slider, an adjusting screw installed at the left end of the first connecting plate through a locking nut and having an end in contact with the calibration block, a handle assembly connected to the right end of the first connecting plate, a first dial rod vertically fixed on the top of the first connecting plate, a suspension rod slidably fitted on the first dial rod, a first dial indicator installed at the overhanging end of the suspension rod, and a first locking screw for locking the suspension rod;

[0009] The second dial indicator mechanism includes: a second guide rail horizontally installed at the rear side of the bottom plate in the left-right direction, a second slider slidably fitted on the second guide rail, a second connecting plate horizontally fixed on the top of the second slider, a second dial rod vertically fixed on the top of the second connecting plate, a sliding sleeve slidably fitted on the second dial rod, a second dial indicator installed on the sliding sleeve, and a second locking screw for locking the sliding sleeve.

[0010] Preferably, a keyway extending backward from the front side edge is formed on the bottom plate. The lower end of the bearing sleeve is provided with a flange and is fixed to the bottom plate through cooperation with bolts. A positioning pin cooperating with the keyway is provided on the bottom surface of the flange.

[0011] Preferably, the handle assembly includes a handle positioning seat fixed at the right end of the guide rail mounting block, a handle hinged on the handle positioning seat and having an adjustment groove, and a connecting rod connected to the adjustment groove through an adjustment bolt. The other end of the connecting rod is hinged to the right end of the first connecting plate.

[0012] Preferably, the suspension rod is V-shaped, its right end is horizontally arranged and slidably fitted on the first dial rod, and its left end is inclined downward and is installed with the first dial indicator.

[0013] The beneficial effects of the present invention are:

[0014] 1. When detecting, the end face tooth mounting hole inspection tool for positioning the workpiece is positioned through the bearing sleeve, bearing and rotating base shaft, and has a rotating positioning function. The workpiece only needs to be clamped once, and the position degrees in two directions can be measured, greatly saving the measurement time;

[0015] 2. After the workpiece is clamped, as long as it rotates one week, the position accuracy of the inner side of the ear hole is measured. Even if there is accidental collision, it is the accidental collision first and the measurement later, which will not affect the measurement value, and there is no remedial work after accidentally touching the dial indicator.

[0016] 3. Since one-time clamping is adopted, the secondary positioning error is avoided.

[0017] 4. The measurement intensity of employees is reduced, and the human error is also greatly reduced. Brief Description of the Drawings

[0018] Figure 1 It is the front view structural schematic diagram of the present invention.

[0019] Figure 2 It is the left view structural schematic diagram of the present invention.

[0020] Figure 3 It is the three-dimensional structural schematic diagram of the present invention. Detailed Embodiment

[0021] To make those of ordinary skill in the art more clearly understand the purpose, technical solution and advantages of the present invention, the following further elaborates the present invention in conjunction with the drawings and embodiments, but the present invention is not limited to the following embodiments.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, for those of ordinary skill in the art, the specific meanings of general terms in the present invention can be understood according to specific situations.

[0023] As Figures 1 to 3 shown, a measuring device for the position accuracy of the end face tooth mounting hole and the ear hole includes a bottom plate 1 and an end face tooth mounting hole checking mechanism, a first dial indicator mechanism, and a second dial indicator mechanism mounted on the bottom plate 1.

[0024] As Figure 1 、 Figure 2 shown, the end face tooth mounting hole checking mechanism includes: a bearing sleeve 27 vertically installed in the middle of the bottom plate 1, a rotating base shaft 26 installed in the bearing sleeve 27 through a bearing (not visible in the figure), a calibration block 25 fixed at the upper end of the rotating base shaft 26 and provided with a calibration plane 25A, and an end face tooth mounting hole checker 16 horizontally fixed on the top of the calibration block 25. A plurality of mounting hole positioning pins are vertically fixed on the top surface of the end face tooth mounting hole checker 16 for positioning the mounting holes of the workpiece 15 (end face tooth flange fork). Through the bearing and the bearing sleeve 27, the end face tooth mounting hole checker 16 can realize circumferential rotation in the horizontal plane.

[0025] The first dial indicator mechanism includes: a height pad 4 fixed to the right side of the base plate 1, a guide rail mounting block 5 fixed to the top of the height pad 4, a first guide rail horizontally installed in the top surface of the guide rail mounting block 5 in the left-right direction, a first slider 3 slidably fitted on the first guide rail, a first connecting plate 9 horizontally fixed to the top of the first slider 3, an adjusting screw 10 installed at the left end of the first connecting plate 9 through a locking nut 11 and with its end 17 in contact with the calibration block 25, a handle assembly connected to the right end of the first connecting plate 9, a first dial rod 12 vertically fixed to the top of the first connecting plate 9, a suspension rod 30 slidably fitted on the first dial rod 12, a first dial indicator 14 installed at the overhanging end of the suspension rod 30, and a first locking screw 13 for locking the suspension rod 30. The suspension rod 30 is V-shaped, with its right end horizontally arranged and slidably fitted on the first dial rod 12, its left end inclined downward to the side where the workpiece 15 is located, and the first dial indicator 14 is installed thereon.

[0026] The handle assembly includes: a handle positioning seat block 6 fixed to the right end of the guide rail mounting block 5, a handle 8 hinged on the handle positioning seat block 6 and provided with an adjustment slot, and a connecting rod 7 connected to the adjustment slot through an adjustment bolt, with the other end of the connecting rod 7 hinged to the right end of the first connecting plate 9.

[0027] As Figure 2 , Figure 3 shown, the second dial indicator mechanism includes: a second guide rail 18 horizontally installed at the rear side of the base plate 1 in the left-right direction, a second slider 24 slidably fitted on the second guide rail 18, a second connecting plate 23 horizontally fixed to the top of the second slider 24, a second dial rod 22 vertically fixed to the top of the second connecting plate 23, a sliding sleeve 20 slidably fitted on the second dial rod 22, a second dial indicator 21 installed on the sliding sleeve 20, and a second locking screw 19 for locking the sliding sleeve 20. The probe of the second dial indicator 21 is arranged towards the workpiece 15 in the front.

[0028] A keyway 29 extending backward from the front side edge is provided on the base plate 1. The lower end of the bearing sleeve 27 is provided with a flange 28 and is fixed to the base plate 1 through cooperation with bolts. A positioning pin 2 cooperating with the keyway 29 is provided on the bottom surface of the flange 28.

[0029] The working principle of the present invention is:

[0030] (1) Move the second dial indicator 21, first measure the mounting hole positioning pin on the end face tooth mounting hole gauge 16, adjust the second locking screw 19 to control the parallelism between the second slider 24 and the mounting hole positioning pin within 0.01 mm, and then lock the second locking screw 19.

[0031] (2) Insert the mounting holes of the workpiece 15 onto the mounting hole locating pins on the end face tooth mounting hole gauge 16 in a certain direction. Pull the handle 8 to the right to make the connecting rod 7 pull the first connecting plate 9, and adjust the first dial indicator 14 so that the measuring head of the first dial indicator 14 has a press-in amount of 1 mm with the inner side of the workpiece. Then lock the adjusting bolt of the connecting rod 7. Rotate the workpiece 15 for one week, and the difference between the measured values is the symmetry error of the inner sides of the left and right ear holes of the workpiece 15.

[0032] (3) Then loosen the adjusting bolt of the connecting rod 7, pull the handle 8, and make the adjusting screw 10 on the first connecting plate 9 contact the calibration plane 25A through the connecting rod 7. Move the second dial indicator 21 to measure a set of values on the outer sides of the left and right ear holes. Rotate the workpiece 15 by 180 degrees again, and similarly measure another set of values. The position error between the ear holes and the mounting holes can be obtained by addition and subtraction.

[0033] The above are only the preferred embodiments of the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A measuring device for the positional tolerance between the end face tooth mounting hole and the ear hole, characterized in that: It includes a bottom plate (1), an end face tooth mounting hole inspection tool mechanism, a first dial indicator mechanism, and a second dial indicator (21) mechanism mounted on the bottom plate (1). The end face tooth mounting hole inspection tool mechanism includes: a bearing sleeve (27) vertically mounted in the middle of the bottom plate (1), a rotating base shaft (26) mounted in the bearing sleeve (27) through a bearing, a calibration block (25) fixed to the upper end of the rotating base shaft (26) and having a calibration plane (25A), and an end face tooth mounting hole inspection tool (16) horizontally fixed on the top of the calibration block (25). The first dial indicator mechanism includes: a height cushion block (4) fixed to the right side of the bottom plate (1), a guide rail mounting block (5) fixed to the top of the height cushion block (4), a first guide rail horizontally mounted on the top surface of the guide rail mounting block (5) in the left-right direction, a first slider (3) slidably fitted on the first guide rail, a first connecting plate (9) horizontally fixed to the top of the first slider (3), an adjusting screw (10) mounted on the left end of the first connecting plate (9) through a locking nut (11) and having an end (17) in contact with the calibration block (25), a handle assembly connected to the right end of the first connecting plate (9), a first dial rod (12) vertically fixed to the top of the first connecting plate (9), a suspension rod (30) slidably fitted on the first dial rod (12), a first dial indicator (14) mounted on the overhanging end of the suspension rod (30), and a first locking screw (13) for locking the suspension rod (30). The second dial indicator (21) mechanism includes: a second guide rail (18) horizontally mounted on the rear side of the bottom plate (1) in the left-right direction, a second slider (24) slidably fitted on the second guide rail (18), a second connecting plate (23) horizontally fixed to the top of the second slider (24), a second dial rod (22) vertically fixed to the top of the second connecting plate (23), a sliding sleeve (20) slidably fitted on the second dial rod (22), a second dial indicator (21) mounted on the sliding sleeve (20), and a second locking screw (19) for locking the sliding sleeve (20).

2. The measuring device for the positional tolerance between the end face tooth mounting hole and the ear hole according to claim 1, characterized in that: A keyway (29) extending backward from the front side edge is formed on the bottom plate (1). The lower end of the bearing sleeve (27) is provided with a flange (28), and is fixed to the bottom plate (1) through cooperation with bolts of the flange (28). A positioning pin (2) matching the keyway (29) is provided on the bottom surface of the flange (28).

3. The measuring device for the positional tolerance between the end face tooth mounting hole and the ear hole according to claim 1, characterized in that: The handle assembly includes a handle positioning seat block (6) fixed to the right end of the guide rail mounting block (5), a handle (8) hinged on the handle positioning seat block (6) and having an adjustment groove, a connecting rod (7) connected to the adjustment groove through an adjustment bolt, and the other end of the connecting rod (7) is hinged to the right end of the first connecting plate (9).

4. The measuring device for the positional tolerance between the end face tooth mounting hole and the ear hole according to claim 1, wherein: The suspension rod (30) is V-shaped, its right end is horizontally arranged and slidably fitted on the first dial rod (12), and its left end is inclined downward and mounts the first dial indicator (14).

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