A device and method for measuring the M value of involute internal and external gears and internal splines.

Abstract

A device and method for measuring the M-value of involute internal and external gears and internal splines, relating to the field of involute gear measurement technology, solves the problem that existing M-value measuring methods cannot measure the M-value of large-sized product parts. The device includes a three-tube frame structure, a probe assembly, a limiting seat, an optical shaft support seat, a positioning block, and a connecting seat for fixing the three-tube frame structure. The three-tube frame structure includes a support tube and two hollow optical shafts. The two hollow optical shafts pass through two holes in the limiting seat, the positioning block, and the optical shaft support seat, respectively, and are then secured to the positioning block with screws to lock the two hollow optical shafts. The support tube passes through the through holes at the top of the two connecting seats and is installed parallel to the two hollow optical shafts. The bottoms of the two connecting seats are secured by the positioning block and the optical shaft support seat, respectively. The measuring device of this invention solves the problem of measuring ultra-large module gears; it adopts a disc shape, and the probe diameter can be up to 100 mm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of involute gear measurement, and particularly relates to a device and method for measuring M value of involute internal and external gear and internal spline. BACKGROUND

[0002] In actual production, when the measuring ball or measuring rod diameter for measuring M value is greater than , the traditional online M value gauge cannot realize online detection; since such gears are basically super large and super heavy, when the operator holds the product for measuring M value by the online gauge, the operator cannot control the product putting-in force. Therefore, the real data of the product cannot be obtained.

[0003] Since the current handheld online gauge cannot realize detection of the measuring product M value when the measuring ball diameter is greater than , it is even more impossible to realize the structure of the gauge being light and high in strength and capable of measuring M value of 150 mm to 1000 mm, or measuring ball diameter of 50 mm to 100 mm.

[0004] Therefore, in order to solve the problem of measuring large modulus and large size involute gear, the present application designs an M value gauge with a three-tube triangular frame support structure, which fills the blank of M value cross rod distance size of 200 mm to 1000 mm. SUMMARY

[0005] The present application provides a device and method for measuring M value of involute internal and external gear and internal spline, in order to solve the problem that the existing M value detection cannot measure M value of large size product.

[0006] A device for measuring M value of involute internal and external gear and internal spline, comprising a three-tube frame structure, a measuring head assembly, a limiting seat for fixing the three-tube frame structure, an optical axis support seat, a positioning block and a connecting seat.

[0007] The three-tube frame structure comprises a support tube and two hollow optical axes.

[0008] After the two hollow optical axes respectively pass through two holes of the limiting seat, the positioning block and the optical axis support seat, the positioning block is fastened by screws to realize locking of the two hollow optical axes.

[0009] The support tube is installed in parallel with the two hollow optical axes by sequentially passing through through holes at the top of the two connecting seats, and the bottoms of the two connecting seats are fastened by the positioning block and the optical axis support seat.

[0010] A sliding optical axis support seat is installed on the two hollow optical axes, a spring is installed on the sliding optical axis support seat, and the sliding optical axis support seat is limited by the limiting seat. ​

[0011] The measuring head assembly comprises a measuring head connecting rod respectively installed on the sliding optical axis support seat and the lower part of the optical axis support seat, an M value measuring head installed on the measuring head connecting rod, and a measuring block installed on the connecting seat through a measuring block support; the measuring head of the micrometer is on the end surface of the measuring block;

[0012] A sliding optical axis support seat moving device is installed at one end of the support pipe, the sliding optical axis support seat is moved by the moving device, the M value measuring head is moved, the M value measuring head is moved away from the M value measuring head installed on the optical axis support seat, and then the two M value measuring heads are put into the tooth groove of the measured part, the moving device is released, and the sliding optical axis support seat is moved under the action of the spring force, at this time, the value displayed by the micrometer is the M value of the measured part.

[0013] The application also provides a method for measuring the M value of involute internal and external gears and internal splines, which is realized by the M value measuring device for involute internal and external gears and internal splines.

[0014] Step one, calibrate the micrometer by using a calibration part, the calibration part is a cuboid, the long side is used as the rod spacing size of the calibration part, and the width is the diameter size of the measuring ball;

[0015] Step two, the support pipe is used as a measuring handle, the button is pressed, the lever is swung to move the sliding optical axis support seat, the M value measuring head installed on the sliding optical axis support seat is moved away from the other M value measuring head installed on the optical axis support seat, then the distance between the two M value measuring heads is greater than the rod spacing size of the standard part, the two M value measuring heads are put into the groove of the calibration part, the button is released, the sliding optical axis support seat is moved under the action of the spring force, until the two M value measuring heads clamp the calibration part, and the calibration is completed according to the value displayed by the micrometer;

[0016] Step three, press the button, put the two M value measuring heads into the measured involute tooth groove, release the button, and the value displayed by the micrometer is the M value size.

[0017] The application has the following beneficial effects:

[0018] The measuring device can realize measurement of super large module gear, since traditional M value gauges are used for measurement of gear with module of 6 or less and gear diameter of 250 mm or so, when the product exceeds the above index, the first is that the measuring head is not easy to process, the second is that the product weight is heavy, the operator carries the product to measure, the product size is small and the weight is light, the operator can operate with one hand, for the large product weight of dozens of kilograms, two hands are needed to lift or carry, the product is not easy to operate, the force of the measuring head cannot be controlled, there is no repetitive measurement, and the measurement is inaccurate. The M value measuring device (gauge) adopts a triangular frame structure, the measuring slide is a double linear bearing structure, the light axis of the bearing is a hollow shaft with a wall thickness of 2.5 mm to reduce the weight, and the support pipe is a seamless steel pipe with a wall thickness of 1.5 mm, so that the weight of the M value measuring device is not more than 7 kg within the range of 500 mm of the measured gear diameter, the M value measuring device can be easily measured by hand, and when the measured gear diameter is 1000 mm, the weight of the M value measuring device is not more than 10 kg without considering the weight of the special measuring head.

[0019] The measuring device solves the measurement of super large module gear, which adopts a circular disc shape, and the maximum diameter of the measuring head can reach 100 mm, which cannot be realized by the traditional M value gauge.

[0020] The measuring device comprises a support pipe, two hollow light shafts, a connecting seat, a limiting seat, a light shaft support seat, a positioning block and a sliding light shaft support seat, and forms a three-pipe frame structure, wherein the two hollow light shafts form a linear bearing. Since the structure adopts a frame structure, it has rigidity and strength to resist bending deformation within a certain length, the hollow pipe realizes a certain light weight, and the operability of the operator is ensured, so that the problem of online detection of large size gear is solved.

[0021] In the measuring device, the measuring head connecting rod adopts a stepped shaft structure, the lower end is processed with an M6 threaded hole, the measuring ball is processed into a gasket structure during large module measurement, the inner hole is matched with the stepped shaft size of the measuring head connecting rod, and the M value measuring head is locked by using a 90° sinking internal hexagon screw fastening, so that the problem of online detection of large module gear is solved.

[0022] In the measuring device, a sliding light shaft support seat moving device is formed by a lever support seat, a bearing gasket, a support pipe, a lever and a button, which realizes the required function under the premise of not affecting the overall strength. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure is a structural schematic view of the M value measuring device for involute internal and external gear and internal spline;

[0024] Figure 2 Figure 1 is a top view of a measuring device for the M value of involute internal and external gears and internal spline;

[0025] Figure 3 Figure 1 is a top view of a measuring device for the M value of involute internal and external gears and internal spline;

[0026] Figure 4 Figure 1 is a top view of a measuring device for the M value of involute internal and external gears and internal spline;

[0027] Figure 5 Figure 1 is a top view of a measuring device for the M value of involute internal and external gears and internal spline;

[0028] Figure 6 Figure 1 is a top view of a measuring device for the M value of involute internal and external gears and internal spline.

[0029] Figure 1 is a top view of a measuring device for the M value of involute internal and external gears and internal spline. DETAILED DESCRIPTION

[0030] DETAILED DESCRIPTION Figures 1 to 6 A measuring device for the M value of involute internal and external gears and internal spline is described in this embodiment, which includes a three-tube frame structure, a measuring head assembly, a limiting seat 5, a light shaft support seat 18, a positioning block 19 and a connecting seat 11 for fixing the three-tube frame structure.

[0031] The three-tube frame structure includes a support pipe 10 and two hollow light shafts 17.

[0032] After the two hollow light shafts 17 pass through the two holes of the limiting seat 5, the positioning block 19 and the light shaft support seat 18 respectively, the positioning block 19 is fastened by screws to realize the locking of the two hollow light shafts.

[0033] The support pipe 10 is installed in parallel with the two hollow light shafts 17 by passing through the through holes at the top of the two connecting seats 11 in turn, and the bottoms of the two connecting seats 11 are fastened by the positioning block 19 and the light shaft support seat 18 respectively.

[0034] The two hollow light shafts 17 are installed with sliding light shaft support seats 21, springs 24 are installed on the sliding light shaft support seats 21 and are limited by the limiting seats 5;

[0035] The measuring head assembly comprises a measuring head connecting rod 1 installed on the lower part of the sliding light shaft support seat 21 and the light shaft support seat 18 respectively, an M value measuring head 16 installed on the measuring head connecting rod 1, and a measuring block 12 installed on the connecting seat 11 through the measuring block support 13; the measuring head of the micrometer 7 is on the end surface of the measuring block 12;

[0036] A sliding light shaft support seat moving device is installed on one end of the support pipe 10, the sliding light shaft support seat 21 is moved by the moving device, the M value measuring head 16 is moved, the M value measuring head 16 is moved away from the M value measuring head 16 installed on the light shaft support seat 18, and then the two M value measuring heads 16 are put into the tooth groove of the measured member, the moving device is released, the sliding light shaft support seat 21 is moved under the action of the spring 24, and at this time, the value displayed by the micrometer is the M value of the measured member.

[0037] In the embodiment, the sliding light shaft support seat moving device comprises a lever support 8, a bearing gasket 9, a lever 14 and a button 15; the two connecting seats 11 are symmetrical isosceles triangular structures, the triangular top corner has a hole with a diameter size The support pipe 10 is penetrated, the support pipe 10 is a steel pipe with an outer circle diameter size and an inner hole size The lever support 8 is installed on one end of the inner hole of the support pipe 10, the lever support 8 has a 10mm groove, the two side walls of the groove are processed with pin holes with a diameter of The groove is provided with the bearing gasket 9 and the lever 14, a cylindrical pin with a diameter of integrates the bearing gasket 9, the lever 14 and the lever support 8, two long grooves are processed on the support pipe 10, one groove is used for installing the lever 14, and the other groove is used for placing the button 15 installed on the lever 14, the button is exposed from the position of the groove, when the button 15 is pressed, the position of the sliding light shaft support seat 21 on the measuring device is changed, the measuring device is conveniently put in, and the required function is realized without affecting the overall strength. The connecting seat 11 is processed with two holes with a diameter of M5 inner hexagonal screws penetrate the two holes and are fastened with two M5 threaded holes on the upper part of the positioning block 19;

[0038] The other connecting seat 11 is fastened with the light shaft support seat 18 through M5 inner hexagonal screws, they form a three-pipe frame structure, the support pipe 10 is used for preventing the sliding light shaft support seat 21 and the hollow light shaft 17 from realizing linear bearing bending and affecting the measurement accuracy, and the limiting seat 5 locks the hollow light shaft 17, the purpose is to block the spring 24 installed in the sliding light shaft support seat 21, and the spring 24 provides a measuring force for the sliding light shaft support seat 21 to measure the M value.

[0039] In the embodiment, the limit seat 5, the optical axis support seat 18, the positioning block 19 and the sliding optical axis support seat 21 are all double-hole structures with the same hole diameter, the same center distance of the double holes and the same outer diameter of the hollow optical axis 17.

[0040] The two holes of the positioning block 19 are processed by wire cutting, and the purpose is that the optical hole of the groove passes through the screw thread hole on the other side, and when the screw is locked, the two holes are slightly deformed to lock the optical axis, the through hole is connected by the center line of the through hole, and the wall thickness on both sides of the groove is processed with a diameter of A through hole and an M8 threaded through hole on the other side, when the two hollow optical axes 17 pass through the limit seat 5, the optical axis support seat 18 and the two holes of the positioning block 19, the M8 screw is screwed into the other side M8 threaded hole and fastened, and the hollow optical axis 17 is locked. The hollow optical axis 17 is a quenched bearing steel pipe with a wall thickness of 3 mm, which mainly guarantees the rigidity and strength while reducing the weight.

[0041] The positioning block 19 in the embodiment has two, the front positioning block 19 is used for positioning the axial dimension when measuring the internal gear, and it provides support for the force measuring spring of the sliding optical axis support seat 21, and the rear positioning block realizes the fixation of the three-pipe frame structure.

[0042] In the embodiment, the bushing 3 and the ball sleeve 4 are also included, the inner hole diameter of the ball sleeve 4 installed in the inner hole of the bushing 3 is the same as the diameter of the hollow optical axis 17, the diameter of the hollow optical axis 17 is 16 mm, the inner hole diameter of the bushing 3 is 22 mm, the diameter difference is 6 mm, the ball sleeve 4 is indicated as an outer diameter of 22 mm and an inner hole diameter of 16 mm according to the standard, the steel ball diameter thereof is 3 mm, the sliding optical axis support seat 21 is transitionally connected to the hollow optical axis 17 through the ball sleeve 4, and the sliding optical axis support seat 21 and the hollow optical axis 17 realize a linear bearing movement relationship.

[0043] In the embodiment, the sliding optical axis support seat 21 and the optical axis support seat 18 are respectively provided with a probe connecting rod 1 below, the M-value probe 16 is installed on the probe connecting rod 1, and the end surface of the probe connecting rod 1 has a 90° sunken M6 threaded hole, so that the M-value probe 16 is fixed on the probe connecting rod 1 after the 90° sunken hexagonal screw is fastened.

[0044] In the embodiment, the measurement block support 13 is installed on the triangular end surface of one of the connecting seats 11 and is fastened by an internal hexagonal screw, the measurement block 12 is a stepped pin structure, is installed in a diameter hole of the measurement block support 13, the large end surface of the measurement block 12 is a micrometer measuring point, the table seat 6 is fastened and installed on the upper end surface of the sliding optical axis support seat 21, and the micrometer 7 is installed with the probe of the table on the large end surface of the measurement block 12. ​

[0045] After the installation of the measuring device of the present application, the measuring device is calibrated by using the calibration piece, and finally the M value measurement is realized.

[0046] Specific embodiment two, the measuring method of the measuring device for the involute internal and external gear and internal spline M value measurement device described in the specific embodiment one, which is realized by the following steps:

[0047] Firstly, the dial gauge 7 is corrected by using the calibration piece 20. The calibration piece 20 is a cuboid structure made of high-carbon steel, with the size of 236 mm (bar spacing size) x 28 mm (measuring ball diameter size) x 20 mm (block thickness), and the individual faces are perpendicular to each other. The long side is the calibration piece bar spacing size, and the width is the measuring ball diameter size. Four quenched plates are fastened on both sides of the width direction, and the M value probe 16 passes through the groove formed by the quenched plates. The calibration piece width and the probe diameter are the same, and the size displayed by the probe during the calibration of the measuring device is the length size of the calibration piece 20. (The probe in the groove conforms to the Abbe principle for the dial gauge);

[0048] Then, press the button 15, and the lever 14 swings to push the sliding optical axis support seat 21 to move. The M value probe 16 installed on the sliding optical axis support seat 21 moves away from the other M value probe 16 installed on the optical axis support seat 18. In this way, the distance between the two M value probes 16 is greater than the bar spacing size, so the two M value probes 16 can be placed in the groove of the calibration piece 20. At this time, the spring 24 is not under stress when the button 15 is released, and the sliding optical axis support seat 21 moves under the action of the spring 24 until the two M value probes 16 clamp the calibration piece 20. At this time, the dial gauge can be directly set to zero for comparison measurement, and the absolute size measurement must use the digital dial gauge. The actual length size of the calibration piece is pre-calibrated on the digital dial gauge, and the diameter size of the two measuring balls (the diameter size tolerance of the measuring ball is ±0.001) is added.

[0049] For example, when the bar spacing size is 236, the calibration piece size is also 236. At this time, the absolute size measurement is that the digital dial gauge can be pre-set to 236. In this case, the measuring device is calibrated on the dial gauge, and then the zero key is pressed to realize that the dial gauge displays 236. When measuring the M value of the gear, the digital dial gauge displays the change based on the size of 236. For relative measurement, the measuring device is calibrated on the dial gauge, and then the zero key is pressed to realize that the dial gauge displays 0. When measuring the M value of the gear, the digital dial gauge displays the change relative to the size of 0.

[0050] Finally, after the completion of the micrometer 7 calibration, the standard part is removed, and the two M value measuring heads 16 on the measuring device are placed in the involute gear slot to be measured, the button 15 is released, and the micrometer 7 displays the M value size. When the micrometer 7 is zero, the cross-bar distance value ± change is displayed, and the actual M value needs to be calculated. The actual length size of the preset calibration part of the digital micrometer is directly displayed as the M value of the part.

[0051] The measuring device described in the embodiment comprises a support tube, a hollow light shaft and a connecting seat, a limiting seat, a light shaft support seat, a positioning block and a sliding light shaft support seat three-tube frame structure, wherein two hollow light shafts constitute a linear bearing. Because the structure adopts a frame structure, it has rigidity and strength to resist bending deformation within a certain length, and the hollow tube also realizes a certain light weight, ensuring the operability of the operator, thereby realizing the problem of online detection of large-size gears.

[0052] In the measuring device described in the embodiment, the measuring head connecting rod adopts a stepped shaft structure, and an M6 threaded hole is processed at the lower end. In large modulus measurement, the measuring ball is processed into a gasket structure, the inner hole is matched with the stepped shaft size of the measuring head connecting rod, and the M value measuring head 16 is locked by using a 90° sinking internal hexagonal screw fastening, thereby realizing the problem of online detection of large modulus gears.

[0053] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0054] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A device for measuring the M value of an involute internal and external gear, internal spline, characterized in that: The measuring device comprises a three-tube frame structure, a measuring head assembly, a limiting seat (5), an optical axis support seat (18), a positioning block (19) and a connecting seat (11) for fixing the three-tube frame structure; The three-tube frame structure comprises a support tube (10) and two hollow optical axes (17); After the two hollow optical axes (17) pass through the two holes of the limiting seat (5), the positioning block (19) and the optical axis support seat (18) respectively, the positioning block (19) is fastened by screws to realize the locking of the two hollow optical axes; The support tube (10) is installed in parallel with the two hollow optical axes (17) by passing through the through holes at the top of the two connecting seats (11) in sequence, and the bottoms of the two connecting seats (11) are fastened by the positioning block (19) and the optical axis support seat (18) respectively; A sliding optical axis support seat (21) is installed on the two hollow optical axes (17), a spring (24) is installed on the sliding optical axis support seat (21) and is limited by the limiting seat (5); The measuring head assembly comprises a measuring head connecting rod (1) installed at the lower parts of the sliding optical axis support seat (21) and the optical axis support seat (18) respectively, an M-value measuring head (16) installed on the measuring head connecting rod (1), a measuring block (12) installed on the connecting seat (11) through a measuring block support (13), and a dial gauge (7) with the measuring head on the end face of the measuring block (12); A sliding optical axis support seat moving device is installed at one end of the support tube (10), the sliding optical axis support seat (21) is moved by the moving device, the M-value measuring head (16) is moved, the M-value measuring head (16) is moved away from another M-value measuring head (16) installed on the optical axis support seat (18), and then the two M-value measuring heads (16) are put into the tooth groove of the measured part, the moving device is loosened, the sliding optical axis support seat (21) is moved under the action of the spring (24), and at this time, the value displayed by the dial gauge (7) is the M value of the measured part; The limiting seat (5), the optical axis support seat (18), the positioning block (19) and the sliding optical axis support seat (21) are all double-hole structures with the same center distance between the two holes; The two holes of the positioning block (19) are connected by a slot of the center line of the via, a through hole is processed on one side of the two side walls of the slot, and a threaded hole is processed on the other side, when the two hollow optical axes (17) pass through the two holes of the limiting seat (5), the optical axis support seat (18) and the positioning block (19), the screw is screwed into the threaded hole on the other side and the screw is fastened, and the hollow optical axis (17) is locked; The sliding optical axis support seat moving device comprises a lever support (8), a bearing gasket (9), a lever (14) and a button (15), and the bearing gasket (9), the lever (14) and the lever support (8) are connected as a whole by a cylindrical pin; Two long slots are arranged on the support tube (10), one is used for installing the lever (14), and the other is used for placing the button (15) installed on the lever (14); The measuring block support (13) is installed on the triangular end face of the connecting seat (11) and fastened by screws, the measuring block (12) is a stepped pin structure and is installed on the measuring block support (13), the large end face of the measuring block (12) serves as the measuring point of the dial gauge, the dial gauge seat (6) is fastened to the upper end side face of the sliding optical shaft support seat (21), and the measuring head of the dial gauge (7) is on the large end face of the measuring block (12) after installation.

2. A device for measuring the M value of an involute internal or external gear or spline according to claim 1, characterized in that: The sleeve (3) and the bead (4) are further included; the sliding optical shaft support seat (21) is transitionally connected to the hollow optical shaft (17) through the bead (4) installed in the sleeve (3), and the sliding optical shaft support seat (21) and the hollow optical shaft (17) realize linear bearing movement.

3. A device for measuring the M value of an involute internal or external gear or spline according to claim 1, characterized in that: The two connecting seats (11) are isosceles triangular structures, the support pipe (10) passes through the hole at the top corner of the triangle and is parallel to the hollow optical shaft (17); two through holes are arranged on each triangular bottom face for fastening with the threaded holes on the positioning block (19) and the threaded holes on the optical shaft support seat (18) through screws.

4. A device for measuring the M value of an involute internal or external gear or spline according to claim 1, characterized in that: The end face of the measuring head connecting rod (1) is provided with a 90°-sunk threaded hole, and the M-value measuring head (16) is fixed on the measuring head connecting rod (1) after the 90°-sunk screw is fastened.

5. A device for measuring the M value of an involute internal or external gear or spline according to claim 1, characterized in that: The support pipe (10) is a seamless steel pipe with a wall thickness of 1.5 mm, and the two hollow optical shafts (17) are hollow shafts with a wall thickness of 2.5 mm.

6. A method for measuring the M value of an involute internal and external gear, internal spline, characterized by: The method is realized by the M-value measuring device for involute internal and external gears and internal splines according to any one of claims 1-5, and is characterized by the following steps: Step one, calibrate the dial gauge by using a calibration piece, the calibration piece is a cube, the long side is the rod spacing size of the calibration piece, and the width is the diameter size of the measuring ball; Step two, the support pipe (10) is used as a handle, the button (15) is pressed, the lever (14) swings to push the sliding optical shaft support seat (21) to move, the M-value measuring head (16) installed on the sliding optical shaft support seat (21) moves away from the other M-value measuring head (16) installed on the optical shaft support seat (18), then the distance between the two M-value measuring heads (16) is greater than the standard rod spacing size, the two M-value measuring heads (16) are put into the groove of the calibration piece (20), and the button (15) is released, the sliding optical shaft support seat (21) moves under the action of the spring (24) until the two M-value measuring heads (16) clamp the calibration piece, and the calibration is completed according to the value displayed by the dial gauge; Step three, press the button (15), put the two M-value measuring heads (16) into the measured involute gear slot, and release the button, then the value displayed by the dial gauge is the M-value size.

Images