A device, method and group matching method for measuring the axial correction value of intermediate double gears

Abstract

This invention discloses a measuring device, measuring method, and group selection method for measuring the axial correction value of an intermediate double gear. The measuring device includes a base plate and a first support device, a second support device, helical gear positioning teeth, spur gear positioning teeth, a dial indicator device, and contact indicators mounted on the base plate. Contact indicators are installed on the first support device, the second support device, the helical gear positioning teeth, and the spur gear positioning teeth, respectively. A circuit loop is formed by the complete contact between the mating surfaces of the first support device, the second support device, the helical gear positioning teeth, the spur gear positioning teeth, and the mating surfaces of the intermediate double gear being measured. This invention ensures measurement efficiency, enhances measurement stability, reduces measurement difficulty, improves measurement efficiency, and increases measurement repeatability and consistency. It effectively avoids situations where inaccurate measurements lead to excessive vibration values ​​in the entire machine or abnormal damage or even scrapping of the meshing parts due to poor gear meshing.

Description

Technical Field

[0001] This invention relates to the field of intermediate double gear testing technology, and more specifically, to an intermediate double gear axial correction value measuring device, measuring method, and group selection method. Background Technology

[0002] A two-stage star gear transmission system for a gas turbine starter reducer requires the machining, selection, and measurement of the intermediate double gears. These intermediate double gears are composed of helical and spur gears. The machining of individual helical and spur gears involves symmetry control relative to a reference datum. Assembling them into the intermediate double gears involves the fit relationship and angular deviation control of the individual helical and spur gears. Grouping the intermediate double gears involves group selection and measurement. Existing machining and assembly methods and their corresponding measurement techniques have poor accuracy and are difficult to correct for measured values. CN202210620912.3 describes a detection device and method for the consistency of angular error in double gears. The detection device includes a base, a gear inspection mechanism at one end of the base, and a gear positioning mechanism at the other end. The gear inspection mechanism includes a shaft with a bushing at its lower end and a bearing at its upper end. A gear sleeve is fixedly connected to the outer ring of the bearing. The outer circumference of the gear sleeve has a contoured tooth and a measuring rod. A dial indicator is also provided on the side of the base, with the dial indicator's probe in contact with the measuring rod. This patent uses a gear inspection mechanism to simulate meshing with a double gear, and a gear positioning mechanism to position the double gear, ensuring that the profiling teeth and the double gear are at the same meshing height during each test. This controls variables, reduces testing errors, and thus facilitates the matching of gear groups. However, it does not include correction measurements for the axial parameters of the gears.

[0003] The assembly process involves measuring the axial correction value of the gear system. The fit between the gear being measured (spur gear or helical gear) and the corresponding gear in the measuring device is critical (both surfaces of the gears must be in contact simultaneously). Inaccurate measurement of the correction value is easily caused by the inability to accurately determine whether the two surfaces of the gear being measured and the corresponding gear in the measuring device are in contact simultaneously, or by the misalignment of the centerline formed by the axis of the intermediate double gear journal and the support surface of the bracket device (causing the journal to be misaligned due to radial force). This leads to poor meshing of the gear system after assembly, causing abnormal gear wear or excessive vibration of the entire machine during starter operation. Furthermore, axial movement control is generally achieved by grinding the axial dimensions of the parts, which is prone to causing parts to be scrapped due to the difficulty in precisely controlling the grinding amount, posing a significant risk. Summary of the Invention

[0004] The main technical problem to be solved by the present invention is to address the shortcomings of the prior art in measuring the axial value of the intermediate double gear and controlling the axial movement, and to provide a device for measuring the axial correction value of the intermediate double gear, as well as a measurement method based on the device.

[0005] Another technical problem solved by the present invention is to provide a method for selectively matching intermediate dual gears in groups.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A measuring device for axial correction value of intermediate double gear includes a base plate and a support device 1, a support device 2, a helical gear positioning tooth, a spur gear positioning tooth, a dial indicator device, and a contact indicator device mounted on the base plate. The support device 1 and the support device 2 are installed facing each other, and the helical gear positioning tooth and the spur gear positioning tooth are disposed between the support device 1 and the support device 2. The helical gear positioning tooth has a working surface that fits against the helical tooth of the intermediate double gear, and the spur gear positioning tooth has a working surface that fits against the spur tooth of the intermediate double gear.

[0008] The contact indicator device includes a power supply, an indicator light, and a contactor. An indicator light is provided on the connection line between the contactor and the power supply. A left contactor and a right contactor are respectively provided on the working surfaces of the support device one, support device two, helical gear positioning teeth, and spur gear positioning teeth. Left contactor one on support device one is connected to one electrode of the power supply via a line, and right contactor one is connected to the other electrode of the power supply via a line, forming a first contact indicator circuit loop. Left contactor two on the helical gear positioning teeth is connected to one electrode of the power supply via a line, and right contactor two is connected to the other electrode of the power supply via a line, forming a second contact indicator circuit loop. Left contactor three on the spur gear positioning teeth is connected to one electrode of the power supply via a line, and right contactor three is connected to the other electrode of the power supply via a line, forming a third contact indicator circuit loop. Left contactor four on support device two is connected to one electrode of the power supply via a line, and right contactor four is connected to the other electrode of the power supply via a line, forming a fourth contact indicator circuit loop.

[0009] The meter holder device includes a meter holder sleeve and a measuring head. The measuring head is mounted on the base plate through the meter holder sleeve, and the measuring head can measure the straight tooth surface of the intermediate double gear.

[0010] Furthermore, the bracket device one, bracket device two, helical gear positioning teeth, and spur gear positioning teeth are all divided into two completely isolated parts, with the left contactor and the right contactor located in the two parts respectively.

[0011] Furthermore, the base plate is provided with a guide rail groove, and the first bracket device and the second bracket device are provided with guide rail blocks that cooperate with the guide rail groove. The first bracket device and the second bracket device are movably connected to the guide rail groove on the base plate through the guide rail blocks.

[0012] A method for measuring the axial correction value of an intermediate double gear, comprising the following steps:

[0013] S1. The journals at both ends of the intermediate double gear marked "Ⅰ" are tightened and fixed to the bracket device one and bracket device two with nuts, so that the spur tooth surface and helical tooth surface of the intermediate double gear are aligned with the spur gear positioning teeth and helical gear positioning teeth respectively. A spring washer is provided at the nut tightening position to ensure that the intermediate double gear can move along the axial direction of the measuring device during the measurement process.

[0014] S2. Using the gear end face as the alignment tooth, adjust the axial position of the intermediate double gear so that the working surface of the alignment tooth contacts the working surfaces of the helical gear positioning tooth and the spur gear positioning tooth simultaneously. The indicator lights on the circuit loop formed by the helical gear positioning tooth, the spur gear positioning tooth and the intermediate double gear being measured are all lit. Record the reading value X1 of the axial displacement of the end face of the intermediate double gear indicated by the measuring instrument. If the indicator light is not lit, reassembly is required.

[0015] S3. Measure the intermediate double gears marked "Ⅱ" and "Ⅲ" sequentially according to the above steps, and record the readings X2 and X3 of the measuring instrument respectively. Take the X1' value of intermediate double gear "Ⅰ" as the reference value. Then the correction values ​​for the three intermediate double gears are as follows:

[0016] △1=0

[0017] △2=X2-X1

[0018] △3 = X3 - X1.

[0019] A method for selecting intermediate dual gears in a group, comprising the following steps:

[0020] S1. Machining of the large gear teeth of the intermediate double gear;

[0021] The large gear external helical teeth are roughed using a gear hobbing machine, then the outer diameter of the helical teeth is machined by an external cylindrical grinder, and finally the internal spline of the large gear is machined using a horizontal broaching machine.

[0022] S2. Machining of the small gear teeth in the intermediate double gear;

[0023] Use a gear shaper to perform rough machining of the small straight teeth, then use a worm gear grinder to perform finish machining of the straight teeth, and finally use a gear shaper to perform external spline machining of the large teeth.

[0024] S3. Combination of helical and spur gears in the middle double gear;

[0025] S31. Pair the large and small teeth of the intermediate double gears according to the double-sided interference fit. Use the intermediate double gear group matching measurement device to measure the relative angular deviation between the spur and helical teeth angular positioning teeth. Select the symmetry of the single piece according to the same direction.

[0026] S32. Heat the paired large teeth and cool the small teeth in liquid nitrogen. Align the tooth surfaces of the large and small teeth, press them together quickly, and keep them at room temperature. After the parts have cooled, ensure that the end faces of the two individual parts are in contact without gaps.

[0027] S33. Use a vertical drilling machine to complete the machining of the inclined hole for the limiting cylindrical pin, and complete the punching and riveting installation of the cylindrical pin according to the interference fit;

[0028] S34. Use a worm gear grinding machine to complete the finishing of the large external helical gear;

[0029] S4. Use the intermediate double-gear axial correction value measuring device to measure the axial correction value;

[0030] S5. Control the axial movement of the intermediate double gear.

[0031] Furthermore, the intermediate dual-gear group selective measurement device includes a base and a gear positioning device, a spring measuring rod device, and a measuring table frame device mounted on the base;

[0032] The gear positioning device includes a bushing whose inner diameter mates with the journal of the intermediate double gear, and a positioning pin on the bushing is connected to the base.

[0033] The spring measuring rod device includes a measuring rod mounting frame, a lever measuring tool, a positioning pin, and a spring. The measuring rod mounting frame has a slot. One end of the lever measuring tool is installed in the slot of the measuring rod mounting frame through the positioning pin. The front end of the lever measuring tool contacts the helical tooth surface of the middle double gear placed on the gear positioning device. The lever measuring tool moves back and forth in the circumferential direction with the center of the positioning pin as the center. A spring is provided in the middle of the lever measuring tool and is connected to the slot wall. A measuring instrument holder device is provided at the other end of the lever measuring tool.

[0034] The measuring instrument holder includes a measuring sleeve, an adjustable screw, and a measuring head. The measuring head is mounted on the measuring rod mounting bracket through the measuring sleeve, and the measuring head is in contact with the lever measuring instrument. The adjustable screw passes through the measuring sleeve and is in contact with the measuring head.

[0035] Furthermore, the positioning pin is located on the contact surface where the spur teeth of the intermediate double gear coincide with the bushing, and the positioning pin is located within the included angle α formed by the lines connecting the center of the intermediate double gear with the intersection points of the working surfaces of the spur teeth and the helical teeth and the pitch circle respectively.

[0036] Furthermore, the intermediate dual gear grouping selection measurement step includes:

[0037] S311. Install the intermediate double gear to be measured onto the gear positioning device, with the spur tooth working surface of the intermediate double gear in contact with the positioning pin and the helical tooth working surface of the intermediate double gear in contact with the front end probe of the lever measuring tool.

[0038] S312. Rotate the middle double gear under test and read the reading on the meter to obtain the relative angular deviation between the spur and helical teeth angular positioning teeth;

[0039] S313. Measure the relative angular deviation of the angular positioning teeth of the other intermediate double gears spur and helical teeth using the same method;

[0040] S316. Calculate the angular difference δ between the two working surfaces of the marked teeth of the intermediate double gear and quickly group them according to the tolerance range.

[0041] Furthermore, in the dual-gear grouping selection, a standard intermediate dual gear is used as standard data to zero the meter measurement.

[0042] Furthermore, the axial movement control step includes:

[0043] S51. Install the journals at both ends of the intermediate double gear on the front and rear bearing mounting seats, and adjust the clearance using adjusting washer one and adjusting washer two respectively, and then seal the bearing ends with bearing cover plates;

[0044] S52. The three intermediate double gears are installed as a group, and the actual values ​​of the dimensions Ai of the three bearing mounting seats on the casing assembly and the actual values ​​of the dimensions ai of the bearing cover plate 3 are respectively.

[0045] S53. Measure and record the dimension Bi for the three cases after eliminating the axial clearance of the bearing;

[0046] S54. Calculation of adjusting washers:

[0047] S54. Calculation for adjusting washer two:

[0048] Taking the selection of a set of intermediate double gear adjusting washers II as the baseline group, that is, selecting an adjusting washer with a thickness of t1 from the complete set of adjusting washers I, the calculated thickness W1 of the first set of adjusting washers II is:

[0049] W1 = A1 - B1 - a1 - S1 - Z

[0050] In the formula: S1 is the measured value of t1, and Z is the required axial movement control value;

[0051] Group 2: W2 = W1 + (a1 - a2) + (B1 - B2) - △2

[0052] Group 3: W3 = W1 + (a1 - a3) + (B1 - B3) - △3

[0053] Calculation for adjusting washer one:

[0054] Calculate the thickness of the adjusting washer 1 in the other two gear sets:

[0055] S2=A2-B2-W2-a2-Z

[0056] S3 = A3 - B3 - W3 - a3 - Z

[0057] S55. Select an adjusting washer from the complete set of adjusting washers one and two. If there is no adjusting washer with the corresponding calculated thickness in the complete set of adjusting washers, grind it to the calculated thickness.

[0058] Compared with existing technologies, the beneficial effects are:

[0059] This invention utilizes a support device for axial correction value measurement, where the mating surfaces of the support device 1, support device 2, helical gear positioning teeth, spur gear positioning teeth, and the intermediate double gears being measured are completely engaged. This effectively solves the problem that in production, measurement accuracy can only be controlled by workers based on experience and feel. This ensures measurement efficiency, enhances measurement stability, reduces measurement difficulty, and improves measurement repeatability and consistency. It effectively avoids situations where inaccurate measurements lead to poor gear meshing, resulting in excessive vibration values ​​in the entire machine or abnormal damage or even scrapping of the meshing parts. Furthermore, this invention effectively avoids the problem of part scrapping or low accuracy in controlling axial movement caused by directly grinding the axial dimensions of the parts. By selecting and using adjusting shims, the accuracy of axial movement control is greatly improved, and the risk of part scrapping is reduced.

[0060] The manufacturing process of this invention is simple and easy to use, reducing the skill requirements for operators and making it more in line with actual production conditions. Attached Figure Description

[0061] Figure 1 This is a diagram of the intermediate double gear group selection and measurement device;

[0062] Figure 2 This is a diagram of a spring measuring rod device;

[0063] Figure 3 This is a diagram of the intermediate double gear measuring device;

[0064] Figure 4 These are structural diagrams of helical gear positioning teeth and spur gear positioning teeth.

[0065] Figure 5 These are structural diagrams of support device one and support device two;

[0066] Figure 6 This is a schematic diagram for calculating the size of the intermediate double gear adjusting washer chain.

[0067] Among them, 1 is the intermediate double gear, 2 is the bearing mounting seat, 3 is the bearing cover plate, 4 is the first adjusting washer, 5 is the second adjusting washer, 11 is the base, 12 is the gear positioning device, 13 is the measuring instrument stand device, 131 is the measuring rod mounting bracket, 132 is the lever measuring tool, 133 is the second positioning pin, 134 is the spring, 135 is the instrument head, 21 is the base plate, 22 is the first bracket device, 23 is the second bracket device, 24 is the helical gear positioning tooth, 25 is the spur gear positioning tooth, and 26 is the instrument stand device. Detailed Implementation

[0068] The following examples further explain and clarify the invention, but the specific examples do not limit the invention in any way.

[0069] Example 1

[0070] This embodiment provides a measurement device for the grouping and matching of intermediate dual gears, such as... Figure 1 It includes a base 11 and a gear positioning device 12, a spring measuring rod device and a measuring table frame device 13 mounted on the base 11;

[0071] The gear positioning device 12 is a bushing whose inner diameter mates with the outer circle of the small tooth journal of the intermediate double gear 1. The outer circle of the bushing is fixed to the base 11 by a positioning pin. The positioning pin is located on the contact surface where the spur tooth of the intermediate double gear 1 coincides with the bushing, and the positioning pin is located within the included angle α formed by the lines connecting the center of the intermediate double gear 1 with the intersection points of the working surfaces of the spur tooth and the helical tooth and the pitch circle, respectively. By adjusting the height dimensions of the bushing of the gear positioning device 12 and the measuring rod mounting bracket 131, it is ensured that the front end of the measuring lever gauge 132 and the axial section specified by the helical tooth of the intermediate double gear 1 are in the same plane.

[0072] like Figure 2The spring measuring rod device includes a measuring rod mounting frame 131, a measuring lever measuring instrument 132, a second positioning pin 133, and a spring 134. The measuring rod mounting frame 131 has a slot. One end of the measuring lever measuring instrument 132 is installed in the slot of the measuring rod mounting frame 131 through the second positioning pin 133. The measuring lever measuring instrument 132 moves back and forth in the circumferential direction with the center of the second positioning pin 133 as the center. The front end of the measuring lever measuring instrument 132 contacts the helical tooth surface of the intermediate double gear 1 placed on the gear positioning device 12. The contact point coincides with the intersection of the ray drawn from the center of the gear and the working surface and the pitch circle of the helical tooth of the intermediate double gear 1 in the axial section. A spring 134 is provided in the middle of the measuring lever 132 and connected to the slotted wall. The spring force applied by the spring acts on the rear end of the measuring lever 132, in a direction parallel to the plane of the base 11. When no measurement is being performed, the spring 134 should be in a slightly compressed state, so the rear end of the measuring lever 132 moves clockwise along the circumference. When measuring, first apply force to make the rear end of the measuring lever 132 move counterclockwise along the circumference, so the front probe of the measuring lever 132 moves away from the surface of the gear being measured. Release the force to make the rear end of the measuring lever 132 move clockwise along the circumference, so the front probe of the measuring lever 132 moves closer to the surface of the gear being measured, thus realizing the measurement.

[0073] The other end of the lever measuring instrument 132 is equipped with a measuring instrument holder 13. The measuring instrument holder 13 includes a gauge sleeve, an adjustable screw, and a gauge head 135. The gauge head 135 is mounted on the measuring rod mounting bracket 131 through the gauge sleeve, and the gauge head 135 passes through the hole in the gauge sleeve and contacts the lever measuring instrument 132. The adjustable screw passes through the gauge sleeve and contacts the gauge head 135. The position of the gauge head 135 can be adjusted as needed by tightening or loosening it. The distance from the point on the lever measuring instrument 132 where the gauge head 135 acts to the positioning pin 133 is in a fixed ratio to the distance from the measuring point at the front end of the lever measuring instrument 132 to the positioning pin 133.

[0074] Due to the dispersed nature of parts processing, a better solution is to manufacture a set of standard intermediate double gears 1 as standard parts. By using more precise methods such as coordinate measuring machines, it can be ensured that the angular difference between the two working surfaces of the standard intermediate double gears 1 is the ideal value. Before measuring any subsequent intermediate double gears 1 to be tested, the standard intermediate double gears 1 should be placed on the group-selected measuring device. After obtaining the actual measurement data, the dial indicator 135 should be zeroed, and then the standard data should be used as the reference for measuring the subsequent parts to be tested.

[0075] Example 2

[0076] This embodiment provides an operation method based on the intermediate dual-gear grouping and matching measurement device in Embodiment 1, the steps of which include:

[0077] S1. Install the standard intermediate double gear 1 onto the gear positioning device 12. The straight tooth working surface of the intermediate double gear 1 contacts the positioning pin 1, and the helical tooth working surface of the intermediate double gear 1 contacts the front end probe of the measuring lever 132. The data measured by the meter 135 is zeroed.

[0078] S2. Then, the intermediate double gear 1 to be measured is installed on the gear positioning device 12. The spur tooth working surface of the intermediate double gear 1 contacts the positioning pin, and the helical tooth working surface of the intermediate double gear 1 contacts the front end probe of the measuring lever 132.

[0079] S3. Rotate the middle double gear 1 under test and read the reading on the meter at 135 to obtain the relative angular deviation between the spur and helical teeth angular positioning teeth; measure the relative angular deviation between the spur and helical teeth angular positioning teeth of the other middle double gear 1 in the same way;

[0080] S4. Calculate the angular position difference δ between the two working surfaces of the marked teeth of the intermediate double gear 1. If δ≤0.03mm, record the measured value of δ on the certificate of conformity of each intermediate double gear 1, compare it according to the tolerance range of the angular position difference, and quickly complete the grouping.

[0081] Example 3

[0082] This embodiment provides a device for measuring the axial correction value of an intermediate double gear, such as... Figure 3 It includes a base plate 21 and a bracket device 1 22, a bracket device 23, a helical gear positioning tooth 24, a spur gear positioning tooth 25, a display stand device 26 and a contact indicator device mounted on the base plate 21. The bracket device 1 22 and the bracket device 23 are installed facing each other, and the helical gear positioning tooth 24 and the spur gear positioning tooth 25 are arranged between the bracket device 1 22 and the bracket device 23.

[0083] The base plate 21 is made of insulating material and has multiple mounting holes. It has guide rail grooves. The first bracket device 22 and the second bracket device 23 are equipped with guide rail blocks that cooperate with the guide rail grooves. The first bracket device 22 and the second bracket device 23 are movably connected to the guide rail grooves on the base plate 21 through the guide rail blocks, so as to realize the relative position adjustment of the first bracket device 22 and the second bracket device 23 to meet the measurement requirements of the intermediate double gear 1 with different axial dimensions.

[0084] Support devices 1 (22) and 23 (23) support the journals at both ends of the intermediate double gear 1. The diameter d1 of the inscribed circle formed by the V-shaped structure on support device 1 (22) is consistent with the size of the journal on the large tooth side of the intermediate double gear 1. The difference between the height of the center of the inscribed circle diameter d1 from the base 11 and the pitch circle radius of the helical gear positioning tooth 24 should be equal to the radius of the large tooth of the intermediate double gear 1. Similarly, the diameter d2 of the inscribed circle formed by the V-shaped structure on support device 23 is consistent with the journal on the small tooth side of the intermediate double gear 1. The difference between the height of the center of the inscribed circle diameter d2 from the base 11 and the pitch circle radius of the spur gear positioning tooth 25 should be equal to the radius of the small tooth of the intermediate double gear 1. The journals at both ends of the intermediate double gear 1 can be fixed by clamping with wing nuts, but the clamping force should not be too large, and it is necessary to ensure that the intermediate double gear 1 can have a certain amount of movement along the axial direction of the measuring device during the measurement process. Spring 134 washers can be used at this nut clamping point.

[0085] The contact indicator device includes a power supply, an indicator light, and a contactor. An indicator light is provided on the connection line between the contactor and the power supply. For example... Figure 4-5 The support device 1 22, support device 23, helical gear positioning teeth 24, and spur gear positioning teeth 25 are divided into completely isolated left and right parts. Left and right contactors are respectively provided on the working surfaces of the support device 1 22, support device 23, helical gear positioning teeth 24, and spur gear positioning teeth 25 in the left and right parts. Left contactor 1 on support device 1 22 is connected to one electrode of the power supply via a circuit, and right contactor 1 is connected to the other electrode of the power supply via a circuit, forming a first contact indication circuit loop. Left contactor 2 on helical gear positioning teeth 24 is connected to one electrode of the power supply via a circuit, and right contactor 2 is connected to the other electrode of the power supply via a circuit, forming a second contact indication circuit loop. Left contactor 3 on spur gear positioning teeth 25 is connected to one electrode of the power supply via a circuit, and right contactor 3 is connected to the other electrode of the power supply via a circuit, forming a third contact indication circuit loop. Left contactor 4 on support device 23 is connected to one electrode of the power supply via a circuit, and right contactor 4 is connected to the other electrode of the power supply via a circuit, forming a fourth contact indication circuit loop.

[0086] In actual operation, energize both ends of the contact indicator circuit of bracket device 1 (22), bracket device 2 (23), helical gear positioning tooth 24, and spur gear positioning tooth 25. The journals at both ends of the intermediate double gear 1 should be in contact with the working surfaces of bracket device 1 (22) and bracket device 2 (23), respectively. The large tooth (helical tooth) of the intermediate double gear 1 should be in contact with the working surface of the helical gear positioning tooth 24, and the small tooth (spur tooth) of the intermediate double gear 1 should be in contact with the working surface of the spur gear positioning tooth 25. When their working surfaces are in contact, forming a circuit, the indicator light will illuminate. If the large tooth (helical tooth) or small tooth (spur tooth) of the intermediate double gear 1 is only in contact with one working surface, the indicator light will not illuminate, and the intermediate double gear 1 needs to be reinstalled and its axial position readjusted. It is essential to ensure that all indicator lights on the four contact indicator devices are illuminated; otherwise, the position of the intermediate double gear 1 must be readjusted.

[0087] The meter holder device 26 includes a meter holder sleeve and a measuring head 135. The measuring head 135 is mounted on the base plate 21 through the meter holder sleeve, and the measuring head 135 can measure the straight tooth surface of the intermediate double gear 1.

[0088] Example 4

[0089] This embodiment provides a method for measuring the axial correction value of an intermediate double gear based on Embodiment 3, the steps of which include:

[0090] S1. The journals at both ends of the intermediate double gear 1 are pressed and fixed on the bracket device 1 22 and the bracket device 2 23 by nuts, so that the spur tooth surface and the helical tooth surface of the intermediate double gear 1 are aligned with the spur gear positioning tooth 25 and the helical gear positioning tooth 24 respectively. A spring 134 washer is provided at the nut pressing position to ensure that the intermediate double gear 1 can have a certain amount of movement along the axial direction of the measuring device during the measurement process.

[0091] S2. Using the gear end face gear marked "Ⅰ" as the alignment gear, adjust the axial position of the intermediate double gear 1 so that the working surface of the alignment gear contacts the working surfaces of the helical gear positioning gear 24 and the spur gear positioning gear 25 at the same time. The indicator lights on the circuit loop formed by the helical gear positioning gear 24, the spur gear positioning gear 25 and the intermediate double gear 1 being measured are all lit. If the indicator lights are not lit, reassembly is required. Record the reading value X1 of the axial displacement of the end face of the intermediate double gear 1 indicated by the measuring instrument.

[0092] S3. With the measuring instrument stationary, measure the intermediate double gears 1 marked "II" and "III" in sequence according to the above steps, and record the readings X2 and X3 of the measuring instrument respectively. Take the X1' value of intermediate double gear 1 marked "I" as the reference value. Then the correction values ​​of the three intermediate double gears 1 are as follows:

[0093] △1=0

[0094] △2=X2-X1

[0095] △3 = X3 - X1.

[0096] Example 5

[0097] This embodiment provides a method for selecting intermediate dual gears in a group, the steps of which include:

[0098] S1. Machining of the large tooth of the intermediate double gear;

[0099] The large gear external helical teeth are roughed using a gear hobbing machine, then the outer diameter of the helical teeth is machined by an external cylindrical grinder, and finally the internal spline of the large gear is machined using a horizontal broaching machine.

[0100] S2. Machining of the small tooth of the intermediate double gear;

[0101] Use a gear shaper to perform rough machining of the small straight teeth, then use a worm gear grinder to perform finish machining of the straight teeth, and finally use a gear shaper to perform external spline machining of the large teeth.

[0102] S3. Intermediate double gear 1: combination of helical and spur gears;

[0103] S31. Pair the large tooth of the intermediate double gear 1 and the small tooth of the intermediate double gear 1 with double-sided interference, and use the group matching measurement device of the intermediate double gear 1 to match the symmetry of the single piece in the same direction.

[0104] S32. Heat the paired large teeth and cool the small teeth in liquid nitrogen. Align the tooth surfaces of the large and small teeth, press them together quickly, and keep them at room temperature. After the parts have cooled, ensure that the end faces of the two individual parts are in contact without gaps.

[0105] S33. Use a vertical drilling machine to complete the machining of the inclined hole for the limiting cylindrical pin, and complete the punching and riveting installation of the cylindrical pin according to the interference fit;

[0106] S34. Use a worm gear grinding machine to complete the finishing of the large external helical gear;

[0107] S4. Use the intermediate double gear 1 axial correction value measuring device to measure the axial correction value;

[0108] S5. Control the axial movement of the intermediate double gear 1.

[0109] S51. For example Figure 6 Install the journals at both ends of the intermediate double gear 1 onto the front and rear bearing mounting seats 2, and adjust the clearance using adjusting shims one and two respectively, and then seal the bearing ends with bearing cover plate 3.

[0110] S52. The three intermediate double gears 1 are installed as a group, and the actual values ​​of the dimensions Ai of the three bearing mounting seats 2 on the casing assembly and the actual values ​​of the dimensions ai of the bearing cover plate 3 are respectively.

[0111] S53. Measure and record the dimensions Bi for three cases where the axial clearance of the bearing has been eliminated;

[0112] S54. Calculation of adjusting washers:

[0113] S541. Calculation for adjusting washer two:

[0114] Taking the selection of a set of intermediate double gear 1 adjusting washer 2 as the benchmark set, that is, selecting an adjusting washer with a thickness of t1 from the complete set of adjusting washer 1, the calculated thickness W1 of adjusting washer 2 is:

[0115] Group 1: W1 = A1 - B1 - a1 - S1 - Z

[0116] Group 2: W2 = W1 + (a1 - a2) + (B1 - B2) - △2

[0117] Group 3: W3 = W1 + (a1 - a3) + (B1 - B3) - △3

[0118] In the formula: S1 is the measured value of t1, and Z is the required axial movement control value;

[0119] S542. Calculation of adjusting washer one:

[0120] Calculate the thickness of the adjusting washer 1 in the other two gear sets:

[0121] S2=A2-B2-W2-a2-Z

[0122] S3 = A3 - B3 - W3 - a3 - Z

[0123] S55. Select an adjusting washer from the complete set of adjusting washers one and two. If there is no adjusting washer with the corresponding calculated thickness in the complete set of adjusting washers, grind it to the calculated thickness.

[0124] S47. Optional

[0125] S471. The adjusting washers selected from the complete set of adjusting washers one and adjusting washers two have a tolerance of (0 to -0.01) mm.

[0126] S472. If there is no adjusting washer of the calculated thickness in the complete set of adjusting washers, it shall be ground to the calculated thickness with a tolerance of (0 to -0.01) mm.

[0127] S473. After grinding, adjust the washers, remove sharp edges, and clean.

[0128] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A device for measuring the axial correction value of an intermediate double gear, characterized in that, The device includes a base plate and bracket device 1, bracket device 2, helical gear positioning teeth, spur gear positioning teeth, a display stand, and a contact indicator device mounted on the base plate. Bracket device 1 and bracket device 2 are installed facing each other, and the helical gear positioning teeth and spur gear positioning teeth are located between bracket device 1 and bracket device 2. The helical gear positioning teeth have a working surface that engages with the helical teeth of the intermediate double gears, and the spur gear positioning teeth have a working surface that engages with the spur teeth of the intermediate double gears. The contact indicator device includes a power supply, an indicator light, and a contactor. An indicator light is provided on the connection line between the contactor and the power supply. A left contactor and a right contactor are respectively provided on the working surfaces of the support device one, support device two, helical gear positioning teeth, and spur gear positioning teeth. Left contactor one on support device one is connected to one electrode of the power supply via a line, and right contactor one is connected to the other electrode of the power supply via a line, forming a first contact indicator circuit loop. Left contactor two on the helical gear positioning teeth is connected to one electrode of the power supply via a line, and right contactor two is connected to the other electrode of the power supply via a line, forming a second contact indicator circuit loop. Left contactor three on the spur gear positioning teeth is connected to one electrode of the power supply via a line, and right contactor three is connected to the other electrode of the power supply via a line, forming a third contact indicator circuit loop. Left contactor four on support device two is connected to one electrode of the power supply via a line, and right contactor four is connected to the other electrode of the power supply via a line, forming a fourth contact indicator circuit loop. The meter holder device includes a meter holder sleeve and a measuring head. The measuring head is mounted on the base plate through the meter holder sleeve, and the measuring head can measure the straight tooth surface of the intermediate double gear.

2. The intermediate double gear axial correction value measuring device according to claim 1, characterized in that, The bracket device one, bracket device two, helical gear positioning teeth, and spur gear positioning teeth are all divided into two completely isolated parts, with the left contactor and right contactor located in the two parts respectively.

3. The intermediate double gear axial correction value measuring device according to claim 1, characterized in that, The base plate is provided with a guide rail groove, and the first support device and the second support device are provided with guide rail blocks that cooperate with the guide rail groove. The first support device and the second support device are movably connected to the guide rail groove on the base plate through the guide rail blocks.

4. The measurement method of the intermediate double gear axial correction value measuring device according to claim 1, characterized in that the step include: S1. Secure the journals at both ends of the intermediate double gear marked "Ⅰ" to bracket device one and bracket device two by tightening nuts, so that the spur tooth surface and helical tooth surface of the intermediate double gear are aligned with the spur gear positioning teeth and helical gear positioning teeth respectively; S2. Using the gear end face as the alignment tooth, adjust the axial position of the intermediate double gear so that the working surface of the alignment tooth contacts the working surfaces of the helical gear positioning tooth and the spur gear positioning tooth simultaneously. The indicator lights on the circuit loop formed by the helical gear positioning tooth, the spur gear positioning tooth and the intermediate double gear being measured are all lit. Record the reading value X1 of the axial displacement of the end face of the intermediate double gear indicated by the measuring instrument. S3. Measure the intermediate double gears marked "Ⅱ" and "Ⅲ" sequentially according to the above steps, and record the readings X2 and X3 of the measuring instrument respectively. Take the X1' value of intermediate double gear "Ⅰ" as the reference value. Then the correction values ​​for the three intermediate double gears are as follows: △1=0 △2=X2-X1 △3 = X3 - X1.

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