An internal tooth span measuring device

Abstract

The present invention belongs to the technical field of gear detection, and specifically relates to an internal gear span measurement device, which includes a base, a sector-shaped groove, a linear slide rail and a probe; when measuring an internal gear ring with an even number of teeth, move the linear slide rails on both sides to the middle of the sector-shaped groove, so that the linear slide rails on both sides are kept on the same straight line, and control the probes on both sides to contact the symmetric tooth grooves on both sides of the inner circle of the internal gear ring for measurement; when measuring an internal gear ring with an odd number of teeth, move one linear slide rail to the middle of the sector-shaped groove, and adjust the other linear slide rail along the sector-shaped groove, so that the probe on this side is aligned with the tooth groove of the inner circle of the internal gear ring, and control the probes on both sides to contact the tooth grooves on both sides of the inner circle of the internal gear ring for measurement; thus, it is convenient to measure internal gear rings with different numbers of teeth, and the difficulty of internal gear span measurement is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of gear detection, and specifically relates to an internal gear span measurement device. Background Art

[0002] Internal gear span measurement refers to measuring the distance between the pitches of internal gears. Internal gear span measurement is an important detection means to ensure the manufacturing quality and transmission performance of gears; by measuring the internal gear span, the geometric characteristics and manufacturing accuracy of gears can be evaluated, thereby ensuring the stability and efficiency of gears during transmission.

[0003] Measurement method of internal gear span: First, it is necessary to measure the pitch circle of the gear, which is completed by engaging two round bars with the gear in two opposite directions and extending the contact points to form a circle; then, determine the intersection point of three points as the center of the circle, namely the two points where the round bars contact the gear and the point where the pitch circle contacts the gear after extending through the contact points; finally, connect these two centers of the circle, and the resulting line is the gear's over-pin distance.

[0004] When performing internal gear span measurement, an internal gear over-pin distance gauge is usually used for measurement. When the internal gear over-pin distance gauge is measuring, the telescopic probes on both sides of the bottom are inserted into the tooth ring, and the telescopic probes on both sides are respectively engaged with two tooth grooves on both sides of the tooth ring in opposite directions for measurement; however, due to the situation where the number of teeth of the tooth ring is odd and the tooth grooves of the tooth ring are not symmetrical, it increases the difficulty of internal gear span measurement.

[0005] Therefore, the present invention provides an internal gear span measurement device. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An internal tooth span measuring device described in the present invention includes a base; sector-shaped grooves are provided on both sides of the top surface of the base; the centers of the two sector-shaped grooves coincide with the center of the base; an internal gear ring is placed on the top surface of the base; a measuring unit is arranged inside the sector-shaped groove; the measuring unit includes a linear slide rail slidably arranged at the bottom of the sector-shaped groove; the linear slide rail can rotate and move around the center of the sector-shaped groove; a support column is fixed to the top surface of the slider of the linear slide rail; the top surface of the support column is aligned with the top surface of the base; a probe is arranged on the top surface of the support column; when measuring an internal gear ring with an even number of teeth, move the linear slide rails on both sides to the middle of the sector-shaped groove so that the linear slide rails on both sides are kept in the same straight line, and control the probes on both sides to contact the symmetric tooth grooves on both sides of the inner circle of the internal gear ring for measurement; when measuring an internal gear ring with an odd number of teeth, move one linear slide rail to the middle of the sector-shaped groove and adjust the other linear slide rail along the sector-shaped groove so that the probe on this side is aligned with the tooth groove of the inner circle of the internal gear ring, and control the probes on both sides to contact the tooth grooves on both sides of the inner circle of the internal gear ring for measurement; thus, it is convenient to measure internal gear rings with different numbers of teeth, and the difficulty of internal tooth span measurement is reduced.

[0008] Preferably, an arc-shaped rack is fixedly connected to the bottom of the outer side of the sector-shaped groove; a first motor is fixedly connected to one end of the linear slide rail away from the center of the base; a gear is fixedly connected to the bottom of the output shaft of the first motor; the gear meshes with the arc-shaped rack; the linear slide rail is realized to move and adjust inside the sector-shaped groove.

[0009] Preferably, a first arc-shaped sliding groove is opened at the bottom of the inner circle of the sector-shaped groove; a second arc-shaped sliding groove is opened in the middle of the ground of the sector-shaped groove; the centers of the first arc-shaped sliding groove, the second arc-shaped sliding groove and the sector-shaped groove coincide; a first arc-shaped slider is fixedly connected to one end of the linear slide rail close to the center of the base; the first arc-shaped slider is slidably installed inside the first arc-shaped sliding groove; a second arc-shaped slider is fixedly connected to the middle of the bottom surface of the linear slide rail; the second arc-shaped slider is slidably installed inside the second arc-shaped sliding groove; thus, the linear slide rail always moves around the center of the sector-shaped groove, and then the probe always keeps a perpendicular state with the inner circle tooth groove of the internal gear ring, improving the measurement accuracy.

[0010] Preferably, a mounting seat is fixedly connected to the top surface of the support column; a threaded hole is opened in the middle of the mounting seat; a threaded adjusting rod is fixedly connected to one end of the probe close to the mounting seat; the threaded adjusting rod is in threaded cooperation with the threaded hole; an internal hexagonal groove is opened at one end of the threaded adjusting rod away from the probe; the distance between the probe and the mounting seat is controlled and adjusted, so as to facilitate the adjustment of the probe and improve the measurement accuracy.

[0011] Preferably, a positioning elastic piece is bolted to the outer ring in the middle of the probe; the positioning elastic piece includes a fixing ring bolted to the outer ring in the middle of the probe, and elastic pieces are fixedly connected to both sides of the fixing ring; the probe is kept in the middle of the tooth groove of the internal gear ring, thereby improving the measurement accuracy.

[0012] Preferably, sliding sleeves are fixedly connected to both sides of the mounting base; a push rod is slidably installed inside the sliding sleeves; one end of the push rod close to the probe is bent, and the bending direction of the push rod is away from the side of the probe; a scale is arranged on the top surface of the end of the push rod away from the probe; it is convenient to measure the depth of the tooth groove of the internal gear ring.

[0013] Preferably, first linear sliding grooves are formed at the four corners of the base; first linear sliding blocks are slidably installed inside the first linear sliding grooves; electric push rods are fixedly connected to the bottoms of the first linear sliding grooves; the piston rod ends of the electric push rods are fixedly connected to the first linear sliding blocks; a first bracket is bolted to the top surface of the first linear sliding blocks; clamping rollers are rotatably installed on both sides of the first bracket; the outer rings of the clamping rollers can be in pressing contact with the outer periphery of the internal gear ring; the internal gear ring is clamped and fixed on the top surface of the base, and at the same time, the center of the internal gear ring is aligned with the center of the base, thereby facilitating the operation of the staff and improving the work efficiency.

[0014] Preferably, a second linear sliding groove is formed on one side of the top surface of the base; the second linear sliding groove is located between the two sector grooves; a first lead screw is rotatably installed inside the second linear sliding groove; a second motor is fixedly connected to one side of the base close to the second linear sliding groove; the output shaft of the second motor is fixedly connected to the first lead screw; a second linear sliding block is slidably installed inside the second linear sliding groove; the second linear sliding block is in threaded cooperation with the first lead screw; a housing is fixedly connected to the top surface of the second linear sliding block; a moving component is arranged inside the housing; a convex tooth positioning block is arranged at the top of the moving component; the convex tooth positioning block can be meshed with the tooth groove of the internal gear ring.

[0015] Preferably, the moving assembly includes an elastic guide rod; the middle part of the elastic guide rod is fixedly connected to the middle part of the bottom surface of the shell through an insert; multiple sliding rods are fixedly connected to the inner ends of the shell; a No. 3 linear slider is slidably mounted on the outer rings of the multiple sliding rods on both sides; the two ends of the elastic guide rod are respectively rotatably connected to the No. 3 linear sliders on both sides; a No. 2 screw rod is rotatably mounted on the inner ends of the shell; the No. 2 screw rod is threadedly matched with the No. 3 linear slider; a rotating handle is rotatably mounted on the top side of the middle part of one side of the shell close to the center of the base; the rotating handle and the two No. 2 screw rods on both sides are connected by a synchronous belt mechanism; a top plate is slidably mounted on the top of the shell; The convex tooth positioning block is bolted to the top surface of the top plate; three No. 2 brackets are fixedly connected to the bottom surface of the top plate; concave wheels are arranged on both sides of the bottom surface of the No. 2 bracket; the concave wheels are slidably matched with the elastic guide rod; a No. 3 motor is fixedly connected to one side of a middle No. 2 bracket; the output shaft of the No. 3 motor is fixedly connected to a concave wheel at the bottom of a middle No. 2 bracket; adjustment grooves are provided on both sides of the bottom of the No. 2 brackets on both sides; adjustment blocks are slidably installed on the top of the adjustment grooves; the concave wheels at the bottom of the No. 2 brackets on both sides are rotatably connected to the adjustment blocks; a plurality of springs are fixedly connected between the adjustment blocks and the middle of the No. 2 bracket; it is convenient for the staff to fine-tune the rotation angle of the inner gear ring.

[0016] Preferably, through grooves are provided on both sides of the bottom of the shell; a plurality of arc-shaped calibration grooves are provided on the top surface of the base and on both sides of the No. 2 linear slide groove; the center of the arc-shaped calibration groove is consistent with the center of the base; and the staff can conveniently control the bending degree of the elastic guide rod accurately.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. An internal gear span measuring device described in the present invention comprises a base, a fan-shaped groove, a linear slide rail and a probe; when measuring an internal gear ring with an even number of teeth, the linear slide rails on both sides are moved to the middle of the fan-shaped groove, so that the linear slide rails on both sides remain on the same straight line, and the probes on both sides are controlled to contact the tooth grooves symmetrically on both sides of the inner ring of the internal gear ring for measurement; when measuring an internal gear ring with an odd number of teeth, the linear slide rail on one side is moved to the middle of the fan-shaped groove, and the linear slide rail on the other side is adjusted along the fan-shaped groove, so that the probe on this side is aligned with the tooth grooves of the inner ring of the internal gear ring, and the probes on both sides are controlled to contact the tooth grooves on both sides of the inner ring of the internal gear ring for measurement; thereby facilitating the measurement of internal gear rings with different numbers of teeth and reducing the difficulty of measuring the internal gear span.

[0019] 2. An internal gear span measuring device according to the present invention includes a first arc-shaped chute, a second arc-shaped chute, a first arc-shaped slider, and a second arc-shaped slider; when the linear slide rail moves and adjusts inside the fan-shaped groove, the linear slide rail drives the first arc-shaped slider to slide along the first arc-shaped chute, and at the same time, the linear slide rail drives the second arc-shaped slider to slide along the second arc-shaped chute, so that the linear slide rail can only slide along the first arc-shaped chute and the second arc-shaped chute, thereby enabling the linear slide rail to always move around the center of the fan-shaped groove, and then enabling the probe to always be perpendicular to the inner tooth grooves of the internal gear ring, improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 is an exploded view of the present invention;

[0023] Figure 3 is a perspective view of the base in the present invention;

[0024] Figure 4 is a perspective view of the linear slide rail in the present invention;

[0025] Figure 5 is a perspective view of the mounting seat in the present invention;

[0026] Figure 6 is an exploded view of the mounting seat in the present invention;

[0027] Figure 7 is a perspective view of the first bracket in the present invention;

[0028] Figure 8 is a perspective view of the housing in the present invention;

[0029] Figure 9 is an exploded view of the housing in the present invention;

[0030] Figure 10 is a perspective view of the elastic guide rod in the present invention;

[0031] Figure 11 is a perspective view of the moving component in the present invention;

[0032] Figure 12 is an exploded view of the second bracket in the present invention;

[0033] In the figure: 1. Base; 2. Sector-shaped groove; 3. Internal gear ring; 4. Linear slide rail; 5. Support column; 6. Probe; 7. Arc-shaped rack; 8. First motor; 9. Gear; 10. First arc-shaped chute; 11. Second arc-shaped chute; 12. First arc-shaped slider; 13. Second arc-shaped slider; 14. Mounting seat; 15. Threaded hole; 16. Threaded adjusting rod; 17. Positioning elastic piece; 18. Sliding sleeve; 19. Push rod; 20. First linear chute; 21. First linear slider; 22. Electric push rod; 23. First bracket; 24. Clamping roller; 25. Second linear chute; 26. First lead screw; 27. Second motor; 28. Second linear slider; 29. Outer shell; 30. Convex tooth positioning block; 31. Elastic guide rod; 32. Slide rod; 33. Third linear slider; 34. Second lead screw; 35. Rotating handle; 36. Synchronous belt mechanism; 37. Top plate; 38. Second bracket; 39. Cam; 40. Third motor; 41. Adjusting groove; 42. Adjusting block; 43. Spring; 44. Arc-shaped calibration groove. Specific implementation mode

[0034] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0035] As Figures 1 to 4 shown, an internal gear span measuring device according to an embodiment of the present invention includes a base 1; sector-shaped grooves 2 are provided on both sides of the top surface of the base 1; the centers of the two sector-shaped grooves 2 coincide with the center of the base 1; an internal gear ring 3 is placed on the top surface of the base 1; a measuring unit is arranged inside the sector-shaped groove 2; the measuring unit includes a linear slide rail 4 slidably arranged at the bottom of the sector-shaped groove 2; the linear slide rail 4 can rotate and move around the center of the sector-shaped groove 2; a support column 5 is fixed on the top surface of the slider of the linear slide rail 4; the top surface of the support column 5 is aligned with the top surface of the base 1; a probe 6 is arranged on the top surface of the support column 5.

[0036] During operation, the internal gear ring 3 to be measured is placed on the top surface of the base 1 so that the center of the internal gear ring 3 is aligned with the center of the base 1; control one side of the linear slide rail 4 to move to the middle of the sector-shaped groove 2 so that the probe 6 on this side is aligned with the tooth groove inside the internal gear ring 3, and the slider on this side of the linear slide rail 4 drives the support column 5 and the probe 6 to approach the internal gear ring 3 so that the end of the probe 6 touches the middle of the tooth groove of the internal gear ring 3; then, control the other side of the linear slide rail 4 to move along the sector-shaped groove 2 so that the probe 6 on this side is aligned with the tooth groove inside the internal gear ring 3, and the slider on this side of the linear slide rail 4 drives the support column 5 and the probe 6 to approach the internal gear ring 3 so that the end of the probe 6 touches the middle of the tooth groove of the internal gear ring 3, thereby measuring the internal gear span of the internal gear ring 3.

[0037] The linear slide rail 4 in this embodiment has a distance measurement function (such as using an encoder, a laser rangefinder, a magnetic sensor, an optoelectronic sensor), and can accurately measure the sliding distance of the slider of the linear slide rail 4, that is, it can accurately measure the distance between the end of the probe 6 and the center of the base 1;

[0038] When measuring the internal gear ring 3 with an even number of teeth, move the linear slide rails 4 on both sides to the middle of the sector groove 2, so that the linear slide rails 4 on both sides are kept on the same straight line, and control the probes 6 on both sides to contact the symmetric tooth grooves on both sides of the inner circle of the internal gear ring 3 for measurement;

[0039] When measuring the internal gear ring 3 with an odd number of teeth, move one linear slide rail 4 to the middle of the sector groove 2, and adjust the other linear slide rail 4 along the sector groove 2, so that the probe 6 on this side is aligned with the tooth groove of the inner circle of the internal gear ring 3, and control the probes 6 on both sides to contact the tooth grooves on both sides of the inner circle of the internal gear ring 3 for measurement;

[0040] Thus, it is convenient to measure the internal gear ring 3 with different numbers of teeth, and the difficulty of measuring the internal tooth span is reduced.

[0041] Such as Figures 1 to 4 As shown, an arc-shaped rack 7 is fixedly connected to the outer bottom of the sector groove 2; a first motor 8 is fixedly connected to the end of the linear slide rail 4 away from the center of the base 1; a gear 9 is fixedly connected to the bottom of the output shaft of the first motor 8; the gear 9 meshes with the arc-shaped rack 7;

[0042] During operation, the first motor 8 drives the gear 9 to rotate. By meshing the gear 9 with the arc-shaped rack 7, the linear slide rail 4 is driven to move inside the sector groove 2, thereby realizing the adjustment of the linear slide rail 4 moving inside the sector groove 2.

[0043] Such as Figures 1 to 4 As shown, a first arc-shaped sliding groove 10 is opened at the inner bottom of the sector groove 2; a second arc-shaped sliding groove 11 is opened in the middle of the ground of the sector groove 2; the centers of the first arc-shaped sliding groove 10, the second arc-shaped sliding groove 11 and the sector groove 2 are the same; a first arc-shaped slider 12 is fixedly connected to the end of the linear slide rail 4 close to the center of the base 1; the first arc-shaped slider 12 is slidably installed inside the first arc-shaped sliding groove 10; a second arc-shaped slider 13 is fixedly connected to the middle of the bottom surface of the linear slide rail 4; the second arc-shaped slider 13 is slidably installed inside the second arc-shaped sliding groove 11;

[0044] During operation, when the linear slide rail 4 moves and adjusts inside the sector-shaped groove 2, the linear slide rail 4 drives the first arc-shaped slider 12 to slide along the first arc-shaped chute 10. At the same time, the linear slide rail 4 drives the second arc-shaped slider 13 to slide along the second arc-shaped chute 11, so that the linear slide rail 4 can only slide along the first arc-shaped chute 10 and the second arc-shaped chute 11, thereby enabling the linear slide rail 4 to always move around the center of the sector-shaped groove 2. Subsequently, the probe 6 always remains perpendicular to the inner ring tooth grooves of the internal gear ring 3, improving the measurement accuracy.

[0045] As Figures 4 to 6 shown, a mounting seat 14 is fixedly connected to the top surface of the support column 5; a threaded hole 15 is formed in the middle of the mounting seat 14; a threaded adjusting rod 16 is fixedly connected to one end of the probe 6 close to the mounting seat 14; the threaded adjusting rod 16 is in threaded cooperation with the threaded hole 15; an internal hexagonal groove is formed at one end of the threaded adjusting rod 16 away from the probe 6.

[0046] During operation, using a hexagon wrench and cooperating with the internal hexagonal groove of the threaded adjusting rod 16, the threaded adjusting rod 16 is driven to rotate inside the threaded hole 15 of the mounting seat 14 to control and adjust the distance between the probe 6 and the mounting seat 14, thereby facilitating the adjustment of the probe 6 and improving the measurement accuracy.

[0047] As Figures 4 to 6 shown, a positioning elastic piece 17 is bolted to the outer circumference of the middle part of the probe 6; the positioning elastic piece 17 includes a fixing ring bolted to the outer circumference of the middle part of the probe 6, and elastic pieces are fixedly connected to both sides of the fixing ring.

[0048] During operation, the end of the probe 6 is inserted into the tooth groove of the internal gear ring 3, so that the elastic pieces on both sides of the positioning elastic piece 17 are in sliding contact with the side walls of the tooth groove of the internal gear ring 3, keeping the probe 6 in the middle of the tooth groove of the internal gear ring 3, thereby improving the measurement accuracy.

[0049] As Figures 4 to 6 shown, sliding sleeves 18 are fixedly connected to both sides of the mounting seat 14; a push rod 19 is slidably installed inside the sliding sleeves 18; one end of the push rod 19 close to the probe 6 is bent, and the bending direction of the push rod 19 is away from the side of the probe 6; a scale is provided on the top surface of the end of the push rod 19 away from the probe 6.

[0050] During operation, when no measurement is being carried out, the push rod 19 is pushed to slide along the sliding sleeve 18 towards the probe 6, so that the bent part of the push rod 19 is aligned with the end of the probe 6. At this time, the other end of the push rod 19 is aligned with the end of the sliding sleeve 18.

[0051] When measuring, when the probe 6 extends into the tooth groove of the internal gear ring 3, the bent part of the push rod 19 contacts the tooth of the internal gear ring 3. The push rod 19 slides along the sliding sleeve 18, so that the other end of the push rod 19 slides out of the sliding sleeve 18. Matching with the scale on the push rod 19, the length that the push rod 19 slides out is the depth of the tooth groove of the internal gear ring 3, thus facilitating the measurement of the depth of the tooth groove of the internal gear ring 3.

[0052] As Figure 1 , Figure 2 , Figure 3 and Figure 7 shown, four corners of the base 1 are each provided with a first linear sliding groove 20; a first linear sliding block 21 is slidably installed inside the first linear sliding groove 20; a linear electric push rod 22 is fixedly connected to the bottom of the first linear sliding groove 20; the end of the piston rod of the linear electric push rod 22 is fixedly connected to the first linear sliding block 21; a first support 23 is bolted to the top surface of the first linear sliding block 21; clamping rollers 24 are rotatably installed on both sides of the first support 23; the outer ring of the clamping roller 24 can be in pressing contact with the outer circumference of the internal gear ring 3;

[0053] During operation, after the internal gear ring 3 to be measured is placed on the top surface of the base 1, the four linear electric push rods 22 at the four corners of the base 1 simultaneously drive the first linear sliding blocks 21 to slide along the first linear sliding grooves 20, driving the first supports 23 to approach the outer ring of the internal gear ring 3. Multiple clamping rollers 24 simultaneously contact and press the outer ring of the internal gear ring 3, clamping and fixing the internal gear ring 3 on the top surface of the base 1. At the same time, the center of the internal gear ring 3 is aligned with the center of the base 1, thus facilitating the operation of the staff and improving the work efficiency.

[0054] As Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 shown, a second linear sliding groove 25 is provided on one side of the top surface of the base 1; the second linear sliding groove 25 is located between the two sector grooves 2; a first lead screw 26 is rotatably installed inside the second linear sliding groove 25; a second motor 27 is fixedly connected to one side of the base 1 close to the second linear sliding groove 25; the output shaft of the second motor 27 is fixedly connected to the first lead screw 26; a second linear sliding block 28 is slidably installed inside the second linear sliding groove 25; the second linear sliding block 28 is in threaded cooperation with the first lead screw 26; a housing 29 is fixedly connected to the top surface of the second linear sliding block 28; a moving component is arranged inside the housing 29; a convex tooth positioning block 30 is arranged at the top of the moving component; the convex tooth positioning block 30 can be engaged with the tooth groove of the internal gear ring 3;

[0055] The moving assembly includes an elastic guide rod 31; the middle part of the elastic guide rod 31 is fixedly connected to the middle part of the bottom surface of the shell 29 through an insert; multiple slide rods 32 are fixedly connected to the inner ends of the shell 29; the outer rings of the multiple slide rods 32 on both sides are slidably mounted with a No. 3 linear slider 33; the two ends of the elastic guide rod 31 are respectively rotatably connected with the No. 3 linear sliders 33 on both sides; the two ends of the inner ends of the shell 29 are rotatably mounted with a No. 2 screw rod 34; the No. 2 screw rod 34 is threadedly matched with the No. 3 linear slider 33; a rotating handle 35 is rotatably mounted on the top side of the middle part of a side of the shell 29 close to the center of the base 1; the rotating handle 35 and the two No. 2 screw rods 34 on both sides are connected by a synchronous belt mechanism 36; the top of the shell 29 is slidably mounted with a top plate 37; the convex tooth positioning block 30 is bolted to the top surface of the top plate 37; three No. 2 brackets 38 are fixedly connected to the bottom surface of the top plate 37; cam wheels 39 are arranged on both sides of the bottom surface of the No. 2 bracket 38; the cam wheels 39 are slidably matched with the elastic guide rod 31; a No. 3 motor 40 is fixedly connected to one side of the No. 2 bracket 38 in the middle; the output shaft of the No. 3 motor 40 is fixedly connected to a cam wheel 39 at the bottom of the No. 2 bracket 38 in the middle; adjustment grooves 41 are provided on both sides of the bottom of the No. 2 bracket 38 on both sides; an adjustment block 42 is slidably installed on the top of the adjustment groove 41; the cam wheels 39 at the bottom of the No. 2 bracket 38 on both sides are rotatably connected to the adjustment block 42; a plurality of springs 43 are fixedly connected between the adjustment block 42 and the middle of the No. 2 bracket 38;

[0056] When working, when the multiple clamping rollers 24 fix the inner gear ring 3 on the top surface of the base 1, the second motor 27 drives the first screw rod 26 to rotate, drives the second linear slider 28 to slide along the second linear slide groove 25, and drives the convex tooth positioning block 30 to approach and insert into the tooth groove of the inner gear ring 3;

[0057] The handle 35 is rotated, and the second screw rods 34 on both sides are driven to rotate synchronously through the transmission of the synchronous belt mechanism 36, and the third linear slider 33 is driven to slide along the slide rod 32, and the two ends of the elastic guide rod 31 are driven to bend toward the middle of the base 1, so that the curvature of the elastic guide rod 31 is consistent with the curvature of the inner gear ring 3;

[0058] The third motor 40 drives the concave wheel 39 at the bottom of the second bracket 38 in the middle to rotate, drives the top plate 37 to slide along the elastic guide rod 31, drives the convex tooth positioning block 30 to push the inner gear ring 3 to rotate, and adjusts the angle of the inner gear ring 3 so that the tooth groove of the inner ring of the inner gear ring 3 is aligned with the probe 6 in the middle of the fan-shaped groove 2; thereby, it is convenient for the staff to fine-tune the rotation angle of the inner gear ring 3;

[0059] Due to the elastic force of the spring 43, the adjusting blocks 42 and the cam wheels 39 on the second brackets 38 on both sides approach each other along the adjusting groove 41, so that the cam wheels 39 on both sides are always clamped on both sides of the elastic guide rod 31; thus, when the elastic guide rod 31 bends, the cam wheels 39 on both sides can still firmly clamp the elastic guide rod 31, thereby improving the stability when driving the internal gear ring 3 to rotate.

[0060] As Figures 1 to 3 shown, through grooves are provided on both sides of the bottom of the housing 29; on the top surface of the base 1 and on both sides of the second linear sliding groove 25, a plurality of arc calibration grooves 44 are provided; the centers of the arc calibration grooves 44 coincide with the center of the base 1;

[0061] During operation, when controlling the bending of the elastic guide rod 31, it is compared with reference to the arc calibration grooves 44 on the top surface of the base 1, so as to facilitate the staff to accurately control the bending degree of the elastic guide rod 31.

[0062] Working principle: When no measurement is carried out, push the push rod 19 along the sliding sleeve 18 towards the probe 6, so that the bent part of the push rod 19 is aligned with the end of the probe 6. At this time, the other end of the push rod 19 is aligned with the end of the sliding sleeve 18; control one side of the linear slide rail 4 to move to the middle of the sector groove 2;

[0063] Place the internal gear ring 3 to be measured on the top surface of the base 1. The four electric push rods 22 at the four corners of the base 1 simultaneously drive the first linear slider 21 to slide along the first linear sliding groove 20, driving the first bracket 23 to approach the outer ring of the internal gear ring 3. The plurality of clamping rollers 24 simultaneously contact and press the outer ring of the internal gear ring 3, clamping and fixing the internal gear ring 3 on the top surface of the base 1. At the same time, the center of the internal gear ring 3 is aligned with the center of the base 1;

[0064] The second motor 27 drives the first lead screw 26 to rotate, driving the second linear slider 28 to slide along the second linear sliding groove 25, driving the convex tooth positioning block 30 to approach and insert into the tooth groove of the internal gear ring 3; rotate the turning handle 35, through the transmission of the synchronous belt mechanism 36, drive the two second lead screws 34 on both sides to rotate synchronously, drive the third linear slider 33 to slide along the slide rod 32, drive both ends of the elastic guide rod 31 to bend towards the middle of the base 1, so that the bending arc of the elastic guide rod 31 is consistent with the arc of the internal gear ring 3; the third motor 40 drives the cam wheel 39 at the bottom of one of the second brackets 38 in the middle to rotate, driving the top plate 37 to slide along the elastic guide rod 31, driving the convex tooth positioning block 30 to push the internal gear ring 3 to rotate, adjusting the angle of the internal gear ring 3, so that the tooth grooves in the inner ring of the internal gear ring 3 are aligned with the probe 6 in the middle of the sector groove 2;

[0065] The first motor 8 drives the gear 9 to rotate, and the gear 9 is meshed with the arc rack 7 to drive the linear guide 4 to move inside the fan-shaped groove 2. The linear guide 4 drives the first arc slider 12 to slide along the first arc slide groove 10. At the same time, the linear guide 4 drives the second arc slider 13 to slide along the second arc slide groove 11, so that the linear guide 4 can only slide along the first arc slide groove 10 and the second arc slide groove 11, so that the linear guide 4 always moves around the center of the fan-shaped groove 2, so that the probe 6 on this side is aligned with the tooth groove of the inner ring of the inner gear ring 3;

[0066] The slider on the linear slide rail 4 drives the support column 5 and the probe 6 to approach the inner gear ring 3, so that the end of the probe 6 contacts the middle of the tooth groove of the inner gear ring 3; the end of the probe 6 is inserted into the tooth groove of the inner gear ring 3, so that the elastic sheets on both sides of the positioning spring sheet 17 are in sliding contact with the side walls of the tooth groove of the inner gear ring 3, so that the probe 6 is kept in the middle of the tooth groove of the inner gear ring 3, thereby improving the accuracy of measurement; the bending part of the push rod 19 contacts the teeth of the inner gear ring 3, and the push rod 19 slides along the sliding sleeve 18, so that the other end of the push rod 19 slides out of the sliding sleeve 18, and the sliding length of the push rod 19 is the tooth groove depth of the inner gear ring 3 in combination with the scale on the push rod 19, which is convenient for measuring the tooth groove depth of the inner gear ring 3;

[0067] When measuring the inner gear ring 3 with an even number of teeth, move the linear guide rails 4 on both sides to the middle of the fan-shaped groove 2 so that the linear guide rails 4 on both sides are kept on the same straight line, and control the probes 6 on both sides to contact the symmetrical tooth grooves on both sides of the inner ring of the inner gear ring 3 for measurement;

[0068] When measuring the inner gear ring 3 with an odd number of teeth, the linear slide 4 on one side is moved to the middle of the fan-shaped groove 2, and the linear slide 4 on the other side is adjusted along the fan-shaped groove 2 so that the probe 6 on this side is aligned with the tooth grooves of the inner ring of the inner gear ring 3, and the probes 6 on both sides are controlled to contact the tooth grooves on both sides of the inner ring of the inner ring 3 for measurement; thereby facilitating the measurement of the inner gear ring 3 with different numbers of teeth and reducing the difficulty of measuring the internal tooth span.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An internal tooth span measuring device, characterized in that: The device comprises a base (1); fan-shaped grooves (2) are provided on both sides of the top surface of the base (1); the centers of the fan-shaped grooves (2) on both sides are consistent with the center of the base (1); an inner gear ring (3) is placed on the top surface of the base (1); a measuring unit is arranged inside the fan-shaped groove (2); the measuring unit comprises a linear slide rail (4) slidably arranged at the bottom of the fan-shaped groove (2); the linear slide rail (4) can rotate and move around the center of the fan-shaped groove (2); a support column (5) is fixed on the top surface of the slider of the linear slide rail (4); the top surface of the support column (5) is aligned with the top surface of the base (1); a probe (6) is arranged on the top surface of the support column (5); An arc-shaped rack (7) is fixedly connected to the outer bottom of the fan-shaped groove (2); a first motor (8) is fixedly connected to one end of the linear guide rail (4) away from the center of the base (1); a gear (9) is fixedly connected to the bottom of the output shaft of the first motor (8); the gear (9) is meshed with the arc-shaped rack (7); The inner bottom of the fan-shaped groove (2) is provided with a first arc-shaped slide groove (10); the middle of the ground of the fan-shaped groove (2) is provided with a second arc-shaped slide groove (11); the center of the first arc-shaped slide groove (10), the center of the second arc-shaped slide groove (11) and the center of the fan-shaped groove (2) are consistent; the end of the linear slide rail (4) close to the center of the base (1) is fixedly connected with a first arc-shaped slider (12); the first arc-shaped slider (12) is slidably installed inside the first arc-shaped slide groove (10); the middle of the bottom surface of the linear slide rail (4) is fixedly connected with a second arc-shaped slider (13); the second arc-shaped slider (13) is slidably installed inside the second arc-shaped slide groove (11); The top surface of the support column (5) is fixedly connected with a mounting seat (14); a threaded hole (15) is provided in the middle of the mounting seat (14); a threaded adjustment rod (16) is fixedly connected to one end of the probe (6) close to the mounting seat (14); the threaded adjustment rod (16) is threadedly matched with the threaded hole (15); and a hexagon socket is provided at one end of the threaded adjustment rod (16) away from the probe (6); The middle outer ring of the probe (6) is bolted with a positioning spring (17); the positioning spring (17) comprises a fixing ring bolted to the middle outer ring of the probe (6), and elastic sheets fixedly connected to both sides of the fixing ring; Slide sleeves (18) are fixedly connected to both sides of the mounting seat (14); a push rod (19) is slidably mounted inside the slide sleeve (18); a bend is arranged at one end of the push rod (19) close to the probe (6), and the bending direction of the push rod (19) is away from the probe (6); and a scale is arranged on the top surface of one end of the push rod (19) away from the probe (6).

2. The internal gear span measuring device according to claim 1, characterized in that: A No. 2 linear slide groove (25) is provided on one side of the top surface of the base (1); the No. 2 linear slide groove (25) is located between the fan-shaped grooves (2) on both sides; a No. 1 screw rod (26) is rotatably installed inside the No. 2 linear slide groove (25); a No. 2 motor (27) is fixedly connected to the side of the base (1) close to the No. 2 linear slide groove (25); the output shaft of the No. 2 motor (27) is fixedly connected to the No. 1 screw rod (26); a No. 2 linear slider (28) is slidably installed inside the No. 2 linear slide groove (25); the No. 2 linear slider (28) is threadedly matched with the No. 1 screw rod (26); the top surface of the No. 2 linear slider (28) is fixedly connected to a shell (29); a moving component is arranged inside the shell (29); a convex tooth positioning block (30) is arranged on the top of the moving component; the convex tooth positioning block (30) can mesh with the tooth groove of the inner gear ring (3).

3. The internal gear span measuring device according to claim 2, characterized in that: The moving assembly comprises an elastic guide rod (31); the middle part of the elastic guide rod (31) is fixedly connected to the middle part of the bottom surface of the shell (29) through an insert; a plurality of slide rods (32) are fixedly connected to both ends of the interior of the shell (29); a third linear slider (33) is slidably mounted on the outer rings of the plurality of slide rods (32) on both sides; the two ends of the elastic guide rod (31) are respectively rotatably connected to the third linear sliders (33) on both sides; a second screw rod (34) is rotatably mounted on both ends of the interior of the shell (29); the second screw rod (34) is threadedly matched with the third linear slider (33); a rotating handle (35) is rotatably mounted on the top side of the middle part of one side of the shell (29) close to the center of the base (1); the rotating handle (35) is transmission-connected to the two second screw rods (34) on both sides through a synchronous belt mechanism (36); a top plate (37) is slidably mounted on the top of the shell (29) ; The convex tooth positioning block (30) is bolted to the top surface of the top plate (37); three No. 2 brackets (38) are fixedly connected to the bottom surface of the top plate (37); cam wheels (39) are arranged on both sides of the bottom surface of the No. 2 bracket (38); the cam wheels (39) are slidably matched with the elastic guide rod (31); a No. 3 motor (40) is fixedly connected to one side of the middle No. 2 bracket (38); the output shaft of the No. 3 motor (40) is fixedly connected to a cam wheel (39) at the bottom of the middle No. 2 bracket (38); adjustment grooves (41) are provided on both sides of the bottom of the No. 2 bracket (38) on both sides; an adjustment block (42) is slidably installed on the top of the adjustment groove (41); the cam wheels (39) at the bottom of the No. 2 bracket (38) on both sides are rotatably connected to the adjustment block (42); a plurality of springs (43) are fixedly connected between the adjustment block (42) and the middle of the No. 2 bracket (38).

4. The internal gear span measuring device according to claim 3, characterized in that: A linear groove (20) is provided at each of the four corners of the base (1); a linear slider (21) is slidably installed inside the linear groove (20); an electric push rod (22) is fixedly connected to the bottom of the linear groove (20); the piston rod end of the electric push rod (22) is fixedly connected to the linear slider (21); a bracket (23) is bolted to the top surface of the linear slider (21); clamping rollers (24) are rotatably installed on both sides of the bracket (23); the outer ring of the clamping roller (24) can be squeezed into contact with the outer periphery of the inner gear ring (3).

5. The internal gear span measuring device according to claim 4, characterized in that: Through grooves are provided on both sides of the bottom of the shell (29); a plurality of arc-shaped calibration grooves (44) are provided on the top surface of the base (1) and on both sides of the second linear slide groove (25); the center of the arc-shaped calibration groove (44) is consistent with the center of the base (1).

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