Synchronizer combined tooth edge inclination angle measuring device and method

Abstract

The present invention relates to a measuring device and method for the inclination angle of the edge of a synchronizer coupling tooth, which solves the problems of the existing measuring method that the measurement is difficult, time-consuming and costly when measuring the small edge inclination angle of the coupling tooth surface. The measuring device includes a profiler and two positioning plates; a groove is provided on the table surface of the workbench, and the two positioning plates are arranged in the groove; one positioning plate is used to tighten the tooth side of the first tooth, and the other positioning plate is used to tighten the tooth side of the nth tooth, wherein n is an odd number greater than 3 and less than m / 2, and m is the total number of teeth of the synchronizer gear ring to be measured; the measuring needle is used to measure the strip area where the edge line of the (n+1) / 2th tooth is located, and the strip area includes the tooth surface not greater than 0.5mm on the left side of the edge line and the tooth surface not greater than 0.5mm on the right side. During measurement, only the positioning plate is used to align the chamfered angle coupling tooth, and the profiler is used to complete a measurement in 3 minutes, with fast measurement speed and high efficiency.

Description

Technical Field

[0001] The invention relates to a device and a method for measuring the inclination angle of a synchronizer combined tooth edge. Background Art

[0002] In actual operation of the gearbox, accurate gear shifting, no gear drop, effortless gear shifting, and no gear mismatch all require the precise coordination of relevant synchronizer parts under the operation of the gear shift mechanism. Among them, the sharp angle and edge inclination angle of the sliding gear sleeve, synchronizer ring and synchronizer cone are the most important dimensions for achieving smooth gear shifting.

[0003] The tip angle and edge inclination angle need to be selected at the beginning of the design according to the friction coefficient between the synchronous cone and the synchronous ring. If the tip angle and edge inclination angle are large, the gear will be engaged without synchronization, resulting in gear knocking; if the tip angle and edge inclination angle are small, synchronization cannot be achieved, resulting in idling. The tip angle is measured by the gear measurement center combined with the gear function, while the edge inclination angle is basically impossible to measure except by the metrological three-coordinate.

[0004] The three-coordinate method uses a probe to collect points on the two combined tooth surfaces of the sharp corner to form two chamfered planes, and then uses software to obtain the result by the intersection of the two chamfered planes. This method has high requirements for the three-coordinate method. Because the combined tooth surface is too small, such as 3mm 2 -5mm 2 , the trigger type three-dimensional coordinate measurement cannot measure. Even if the scanning three-dimensional coordinate is used, the measurement is very difficult because the tooth surface is too small, and the measurement time is long, and the hardware requirements are high. Summary of the invention

[0005] In order to solve the problems of difficulty, time and cost in existing measurement methods when measuring small edge inclination angles of combined tooth surfaces, the present invention provides a new and simple measuring device and method, which can accurately and quickly measure an edge inclination angle of 8°.

[0006] The technical solution of the present invention is to provide a synchronizer combined tooth edge inclination measuring device, including a profilometer, the profilometer including a workbench and a measuring needle;

[0007] Features:

[0008] Also included are two positioning plates;

[0009] A groove is provided on the surface of the workbench, and the length direction of the groove is perpendicular to the direction of the profilometer probe;

[0010] The table top of the workbench is used to place the synchronizer gear ring to be tested;

[0011] The two positioning plates are arranged in the groove; one positioning plate is used to press against the tooth side of the first tooth, and the other positioning plate is used to press against the tooth side of the nth tooth, wherein the n is an odd number greater than 3 and less than m / 2, and the m is the total number of teeth of the synchronizer gear ring to be tested;

[0012] The stylus is used to measure the strip area where the edge line of the (n+1) / 2th tooth is located, and the strip area includes the tooth surface not larger than 0.5 mm on the left side of the edge line and the tooth surface not larger than 0.5 mm on the right side of the edge line.

[0013] Furthermore, the groove passes through the center of the workbench.

[0014] Furthermore, for accurate measurement, the above n is 5 or 7.

[0015] Furthermore, in order to achieve accurate positioning of the synchronizer gear ring to be tested, the width of the groove is slightly larger than the thickness of the positioning plate, so that the positioning plate can move in the length direction of the groove and be fixed in the width direction of the groove.

[0016] Furthermore, there may be two grooves, and the two positioning plates are respectively located in the two grooves.

[0017] The present invention also provides a method for measuring the inclination angle of the synchronizer tooth edge by using the above-mentioned measuring device, comprising the following steps:

[0018] Step 1: Place the synchronizer gear ring to be tested on the workbench of the profiler;

[0019] Step 2, install the two positioning plates into the groove, adjust the positions of the positioning plates so that one of the positioning plates presses against the tooth side of the first tooth, and the other positioning plate presses against the tooth side of the nth tooth, where n is an odd number greater than 3 and less than m / 2, and m is the total number of teeth of the synchronizer gear ring to be measured; the profilometer probe points to the strip area where the 8° edge line of the (n+1) / 2th tooth is located, and the strip area includes the tooth surface not greater than 0.5 mm on the left side of the 8° edge line and the tooth surface not greater than 0.5 mm on the right side;

[0020] Step 3: Fine-tune the workbench so that the profilometer probe points to the 8° edge line of the (n+1) / 2th tooth or 0.1-0.2mm away from the 8° edge line;

[0021] Step 4: Measure two straight lines symmetrically at 0.4-0.6mm on the tooth surface on both sides of the 8° edge line;

[0022] Step 5: Use the profilometer measurement software to export the straight lines on both sides and mark the angles α1 and α2 between the two lines and the horizontal direction;

[0023] Step 6. Calculate the edge inclination angle using the formula:

[0024] Edge inclination angle = (α1+α2) / 2.

[0025] Furthermore, in step 4, the profilometer probe is used to measure two straight lines symmetrically at 0.5 mm on both sides of the 8° edge line.

[0026] The beneficial effects of the present invention are:

[0027] 1. The synchronizer combined tooth edge inclination angle measuring device of the present invention is built by using an existing mature device, and the device has a simple structure and low measurement cost;

[0028] 2. The present invention is aimed at measuring the edge inclination angle of the small coupling tooth surface. Only the positioning plate is used to align the chamfered angle coupling tooth. The profilometer is used to complete a measurement in 3 minutes. The measurement speed is fast and the efficiency is high. The accurate measurement of the edge inclination angle of 8° can be achieved, the quality of the synchronizer gear ring can be controlled, the gear shifting efficiency can be improved, and the gear shifting can be prevented.

[0029] 3. By measuring the angle between the two straight lines on the left and right sides of the 8° edge line and the horizontal direction, the error caused by the tilt of the combined tooth placement can be eliminated, ensuring that the measurement accuracy is equivalent to that of the existing technology.

[0030] 4. The synchronizer combined with the tooth edge inclination angle measuring method of the present invention is simple to measure, easy to operate and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0032] Figure 2 The measuring method of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 3 is a cross-sectional view of a synchronizer gear ring of the present invention;

[0034] The reference numerals in the figure are: 1-synchronizer gear ring, 2-positioning plate, 3-measurement needle, 4-workbench (including fine-tuning mechanism), 41-groove, 42-tooth surface a, 43-tooth surface b, 44-8° edge line, 45-straight line a, 46-straight line b. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] like Figure 1 As shown, the synchronizer combined tooth edge inclination angle measuring device of the present invention is mainly composed of a profiler and a positioning plate 2, wherein the profiler includes a workbench 4 and a measuring needle 3, and the workbench 4 also has a fine-tuning mechanism for adjusting the position of the workbench.

[0037] A groove 41 is provided on the surface of the workbench 4, and the length direction of the groove 41 is perpendicular to the direction of the profilometer probe 3. It can also be two grooves located on the same straight line on opposite sides of the surface of the workbench 4, and the straight line is perpendicular to the direction of the profilometer probe 3. As can be seen from the figure, when there is one groove, the groove passes through the center of the workbench, and the two positioning plates 2 are respectively arranged at both ends of the groove; when there are two grooves, the center line of the two grooves passes through the center of the workbench, and the two positioning plates 2 are respectively arranged in the two grooves. The width of the groove is similar to the thickness of the positioning plate, so that the positioning plate can move in the length direction of the groove and be fixed in the width direction of the groove.

[0038] During the specific measurement, first, place the synchronizer gear ring 1 to be measured on the table top of the workbench 4; then, set the two positioning plates 2 in the groove 41. Since the width of the groove is close to the thickness of the positioning plates, the positioning plates can only move along the length direction of the groove, and are fixed in the width direction; then, move the positioning plates 2 along the length direction of the groove so that one of the positioning plates 2 is pressed against one of the tooth side surfaces of the synchronizer gear ring 1 to be measured, and the other positioning plate 2 is pressed against the other tooth side surface of the synchronizer gear ring 1 to be measured. The number of teeth of the synchronizer gear ring 1 to be measured facing the profiler is n, where n is an odd number, which can be 5 or 7, or other odd numbers. The profilometer probe points to the 8° edge of the (n+1) / 2th tooth. The strip area where the line 44 is located includes a tooth surface a42 of no more than 0.5mm on the left side of the 8° edge line 44 and a tooth surface b43 of no more than 0.5mm on the right side. One end of a positioning plate is pressed against one side of the first tooth, and one end of another positioning plate is pressed against one side of the nth tooth. Then, the workbench is fine-tuned to make the profilometer probe point to the 8° edge line 44 of the (n+1) / 2th tooth or deviate from the 8° edge line 44 by 0.1-0.2mm. Finally, the profilometer probe 3 is used to measure two straight lines symmetrically at 0.4-0.6mm on the joint tooth surfaces on the left and right sides of the 8° edge line 44 of the (n+1) / 2th tooth, and 0.5mm can be selected. They are straight line a45 and straight line b46, respectively. See Figure 2 ; The straight lines on both sides are exported through the contour meter measurement software, and the angles α1 and α2 between the two lines and the horizontal direction are marked; the 3D software verifies that if the tooth placement is tilted, the deviations on both sides △1=|α1-8°|=△2=|α2-8°|, therefore, the edge inclination angle is finally calculated by the formula: edge inclination angle=(α1+α2) / 2.

Claims

1. A method for measuring the inclination angle of a synchronizer tooth edge, using a synchronizer tooth edge inclination angle measuring device, the measuring device comprising a profiler and two positioning plates; the profiler comprising a workbench and a measuring needle; characterized in that: The following steps are involved: Step 1: placing the synchronizer gear ring to be measured on the profilometer workbench of the measuring device; The measuring device further comprises two positioning plates; the profiler further comprises a measuring needle; a groove is provided on the table surface of the workbench, and the length direction of the groove is perpendicular to the direction of the measuring needle of the profiler; the table surface of the workbench is used to place the synchronizer gear ring to be measured; the two positioning plates are arranged in the groove; one positioning plate is used to press against the tooth side of the first tooth, and the other positioning plate is used to press against the tooth side of the nth tooth, wherein n is an odd number greater than 3 and less than m / 2, and m is the total number of teeth of the synchronizer gear ring to be measured; the measuring needle is used to measure the strip area where the ridge line of the (n+1) / 2th tooth is located, and the strip area includes the tooth surface not greater than 0.5 mm on the left side of the ridge line and the tooth surface not greater than 0.5 mm on the right side; Step 2, install the two positioning plates into the groove, adjust the positions of the positioning plates so that one of the positioning plates presses against the tooth side of the first tooth, and the other positioning plate presses against the tooth side of the nth tooth, where n is an odd number greater than 3 and less than m / 2, and m is the total number of teeth of the synchronizer gear ring to be measured; the profilometer probe points to the strip area where the 8° edge line of the (n+1) / 2th tooth is located, and the strip area includes the tooth surface not greater than 0.5 mm on the left side of the 8° edge line and the tooth surface not greater than 0.5 mm on the right side; Step 3: Fine-tune the workbench so that the profilometer probe points to the 8° edge line of the (n+1) / 2th tooth or 0.1-0.2mm away from the 8° edge line; Step 4: Measure two straight lines symmetrically at 0.4-0.6mm on the tooth surface on both sides of the 8° edge line; Step 5: Use the profilometer measurement software to export the straight lines on both sides and mark the angles α1 and α2 between the two lines and the horizontal direction; Step 6. Calculate the edge inclination angle using the formula: Edge inclination angle = (α1+α2) / 2.

2. The method for measuring the inclination angle of the synchronizer tooth edge according to claim 1, characterized in that: In step 4, use the profilometer probe to measure two straight lines symmetrically 0.5 mm on both sides of the 8° edge line.

3. The method for measuring the inclination angle of synchronizer tooth edge according to claim 2, characterized in that: In step one, the groove passes through the center of the workbench.

4. The method for measuring the inclination angle of the synchronizer tooth edge according to claim 3 is characterized in that: In step 1, n is 5 or 7.

5. The method for measuring the inclination angle of synchronizer tooth edge according to claim 4, characterized in that: In step one, the width of the groove is slightly larger than the thickness of the positioning plate, so that the positioning plate can move in the length direction of the groove and be fixed in the width direction of the groove.

6. The method for measuring the inclination angle of the synchronizer tooth edge according to claim 5, characterized in that: In step one, there are two grooves, and two positioning plates are respectively located in the two grooves.

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