Odd gear addendum circle measurer

Abstract

The present invention discloses an odd gear addendum circle measuring device, which relates to the technical field of gear detection tools. It includes a measuring frame, and a measuring ruler is slidably connected to the side wall of the measuring frame. One end of the measuring ruler extends into the measuring frame and is fixedly connected with a measuring contact member. The measuring contact member includes an arc-shaped measuring block for contacting the outer ring of the gear to be measured; in the present invention, by controlling the servo motor to drive the pushing gear to rotate, the measuring ruler and the measuring contact member are driven to move, making the measuring operation more automated, reducing manpower consumption, and being more convenient during multiple measurements; by setting the arc-shaped measuring block as an arc-shaped strip with uniform thickness, the starting scale value of the measuring ruler is consistent with the distance from this scale line to the inner wall of the arc-shaped measuring block. In this way, during measurement, the addendum circle diameter of the gear to be measured can be directly obtained by reading, without the need for operations to subtract the distance, making the overall detection speed faster.

Description

Technical Field

[0001] The present invention relates to the technical field of gear detection tools, and specifically to an odd gear addendum circle measurer. Background Art

[0002] During the processing and manufacturing of gears, in order to ensure that the processed workpieces meet the dimensional requirements, it is necessary to measure the addendum circle diameter and the dedendum circle diameter.

[0003] For the measurement of even-tooth gears, due to the symmetric arrangement of their tooth numbers, the measurement can be directly carried out by using a measurement tool to clamp at both ends. However, when the number of teeth of the gear is odd, it is impossible to find two exactly opposite teeth or two tooth spaces. The existing measurement methods must first measure some relevant quantities and then perform necessary and rather cumbersome conversions. For example, one foot of a caliper is tangent to the addendum circle of a tooth, and the other foot is clamped to the addendum edges of two teeth on the opposite side. After measuring the obtained distance and combining angles and trigonometric functions, etc., the addendum circle diameter is calculated. This measurement method has a slow measurement speed and cannot meet the actual use needs. Summary of the Invention

[0004] The purpose of the present invention is to provide an odd gear addendum circle measurer to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] The odd gear addendum circle measurer includes a handle. One end of the handle is fixedly connected with a measurement frame. One side of the measurement frame is provided with a push measurement mechanism. The push measurement mechanism includes a push box. One side of the inner wall of the push box is fixedly connected with a docking plate. The inside of the docking plate is slidably connected with a push plate. One side of the push plate is provided with a push tooth groove. One side of the inner wall of the push box is fixedly installed with a servo motor. The output end of the servo motor is fixedly connected with a push gear. One side of the push gear is meshed with the push tooth groove; One end of the push plate close to the measurement frame is fixedly connected with a measuring ruler. The measuring ruler is slidably connected with one side of the measurement frame; One end of the measuring ruler extends into the measurement frame and is fixedly connected with a measurement contact member. The measurement contact member includes a mounting seat. The middle part of the mounting seat is fixedly connected with a locking plate through a mounting bolt. One side of the locking plate is fixedly connected with an arc-shaped measuring block for contacting the outer ring of the gear to be measured. The middle part of the handle is fixedly installed with a push switch. The push switch is electrically connected with the servo motor.

[0007] As a further solution of the present invention: An adjusting mechanism for adjusting the attitude of the gear to be measured is slidably arranged on the top of the measurement frame. The adjusting mechanism includes a support frame. Both sides of the top of the measurement frame are provided with sliding grooves. The support frame is set as an inverted U-shaped bracket, and the two ends of its bottom are respectively slidably connected with the inner walls of the two sliding grooves;

[0008] A connecting bottom plate is slidably connected to the top of the support frame, a supporting plate is slidably connected to the top of the connecting bottom plate, a plurality of guide rods are fixedly connected to the bottom of the supporting plate, and all the plurality of guide rods are slidably connected to the connecting bottom plate. A driving motor is fixedly installed on the top of the supporting plate, a transmission rod is fixedly connected to the output end of the driving motor, and a limiting member for limiting and supporting the gear to be measured is fixedly connected to the bottom of the transmission rod.

[0009] As a further scheme of the present invention: an adjustment and displacement groove is formed in the middle of the support frame, a positioning tooth groove is formed in one side of the inner wall of the adjustment and displacement groove, positioning plates are fixedly connected to both sides of the connecting bottom plate, positioning push-pull grooves are formed in the middle of the two positioning plates, a push-pull plate is slidably connected to the inner wall of the positioning push-pull groove, a positioning tooth plate is fixedly connected to the bottom of the push-pull plate, and a positioning tooth is formed at one end of the positioning tooth plate close to the positioning tooth groove.

[0010] As a further scheme of the present invention: the limiting member includes a limiting sleeve, a plurality of tightening elastic pieces are fixedly connected to the outer wall of the limiting sleeve, and one ends of the plurality of tightening elastic pieces are bent towards the middle of the limiting sleeve and fixedly connected with contact pieces.

[0011] A convex platform is fixedly connected to the middle of the inner wall of the limiting sleeve, a return spring is fixedly connected to the top of the convex platform, a pushing round platform is fixedly connected to the top of the return spring, and the pushing round platform is set in a frustum shape with a larger bottom surface than the top surface; the side wall of the pushing round platform is attached to a plurality of contact pieces, and a pressing ring is fixedly connected to the top of the pushing round platform.

[0012] As a further scheme of the present invention: a plurality of limiting rotating rollers are arranged on both the upper and lower sides of the pushing plate at equal intervals along the length direction of the pushing plate. The limiting rotating roller includes an intermediate pressing roller, and side rollers are fixedly connected to both ends of the intermediate pressing roller. Roller grooves are formed at the edges of both the upper and lower sides of the pushing plate, and the side rollers on both sides of the limiting rotating roller are respectively arranged in the two roller grooves in a rolling manner.

[0013] As a further scheme of the present invention: a synchronous tooth groove is formed between the two roller grooves, pressing roller tooth grooves are formed on the outer walls of the plurality of intermediate pressing rollers, the pressing roller tooth grooves are engaged with the synchronous tooth groove, one side of the limiting rotating roller close to the inner wall of the pushing box is fixedly connected to the inner wall of the pushing box through a connecting rod, and a transmission gear is fixedly connected to the middle of the connecting rod; a plurality of transmission gears located on both sides of the pushing plate are arranged in one-to-one correspondence and meshed.

[0014] As a further solution of the present invention: on both sides of the inner wall of the docking plate, there are fixedly connected thrust pressing members. Each thrust pressing member includes a pressing spring. One end of the pressing spring is fixedly connected to a roller frame. Inside the roller frame, there is a rotatably connected pressing roller. The bottom of the pressing roller is in fitting contact with the pushing plate.

[0015] As a further solution of the present invention: at the end of the measuring frame away from the handle, there is a snap - connected hanging frame. In the middle of the hanging frame, there is a hanging chute. Inside the hanging chute, there is a digital display indicator slidably installed.

[0016] As a further solution of the present invention: on one side of the digital display indicator and on both sides of the support frame, there are fixedly connected support angle plates. In the middle of the support angle plates, there is a threaded connection with a positioning bolt. The top of the positioning bolt is fixedly connected to a positioning knob.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: by controlling the servo - motor to drive the pushing gear to rotate, driving the measuring ruler and the measuring contact member to move, the measuring operation becomes more automated, reducing labor consumption and being more convenient during multiple measurements; by setting the arc - shaped measuring block as an arc - shaped strip with uniform thickness, the starting scale value of the measuring ruler is consistent with the distance from this scale line to the inner wall of the arc - shaped measuring block. In this way, when measuring, the addendum circle diameter of the gear to be measured can be directly read, without the need for operations to subtract the distance, making the overall detection speed faster;

[0018] Through the limiting cooperation of the roller groove with the side rollers, the lateral displacement of the pushing plate is hindered, improving the lateral stability of the measuring ruler; through the meshing of the transmission gears at corresponding positions, the rotation of the upper and lower limiting rollers is kept synchronous. By using the meshing of the middle pressure roller and the synchronous tooth groove, the longitudinal pressure of the pushing plate and the measuring ruler can be transmitted and dispersed to several limiting rollers, avoiding the longitudinal deviation of the pushing plate and the measuring ruler due to thrust during the measurement process and improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top - view structural schematic diagram of the present invention;

[0020] Figure 2 It is a cross - sectional view of the pushing box of the present invention;

[0021] Figure 3 It is a side - view cross - sectional view of the docking plate of the present invention;

[0022] Figure 4 It is a cross - sectional view of the adjusting mechanism of the present invention;

[0023] Figure 5 It is a cross - sectional view of the limiting member of the present invention.

[0024] In the figure: 1. Measuring frame; 2. Support frame; 3. Adjusting and shifting groove; 4. Supporting plate; 5. Driving motor; 6. Transmission rod; 7. Connecting bottom plate; 8. Positioning plate; 9. Pushing and pulling plate; 10. Limiting sleeve; 11. Tightening elastic piece; 12. Pressing ring; 13. Pushing round table; 14. Contact piece; 15. Positioning toothed plate; 16. Arc-shaped measuring block; 17. Mounting seat; 18. Measuring ruler; 19. Pushing box; 20. Docking plate; 21. Pushing gear; 22. Pushing plate; 23. Side roller; 24. Middle pressure roller; 25. Pressing roller; 26. Transmission gear; 27. Pressing spring; 28. Support angle plate; 29. Digital display indicator; 30. Gear to be measured. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1 - 5 , in the embodiment of the present invention, an odd gear addendum circle measuring device includes a handle. One end of the handle is fixedly connected with a measuring frame 1. One side of the measuring frame 1 is provided with a pushing and measuring mechanism. The pushing and measuring mechanism includes a pushing box 19. One side of the inner wall of the pushing box 19 is fixedly connected with a docking plate 20. The inside of the docking plate 20 is slidably connected with a pushing plate 22. One side of the pushing plate 22 is provided with a pushing tooth groove. One side of the inner wall of the pushing box 19 is fixedly installed with a servo motor. The output end of the servo motor is fixedly connected with a pushing gear 21. One side of the pushing gear 21 is meshed with the pushing tooth groove; One end of the pushing plate 22 close to the measuring frame 1 is fixedly connected with a measuring ruler 18. The measuring ruler 18 is slidably connected with one side of the measuring frame 1. One end of the measuring ruler 18 extends into the measuring frame 1 and is fixedly connected with a measuring contact piece; During measurement, by controlling the servo motor to drive the pushing gear 21 to rotate, driving the measuring ruler 18 and the measuring contact piece to move, making the measurement operation more automated, reducing manpower consumption, and being more convenient during multiple measurements;

[0027] The measuring contact piece includes a mounting seat 17. The middle part of the mounting seat 17 is fixedly connected with a locking plate through a mounting bolt. One side of the locking plate is fixedly connected with an arc-shaped measuring block 16 for contacting the outer ring of the gear to be measured 30. The radian of the arc-shaped measuring block 16 is the same as the addendum circle radian of the gear to be measured 30, so as to ensure that the inner wall of the arc-shaped measuring block 16 can stably fit with the edge addendum circle of the gear to be measured 30 during measurement.

[0028] Please refer to Figure 1, after fitting, the inner wall edge of the arc-shaped measuring block 16 is in contact with the top circle of the gear under test 30, so that the distance from the tooth tip position on the opposite side of the gear under test 30 and the arc-shaped measuring block 16 to the inner wall of the arc-shaped measuring block 16 is the diameter of the top circle of the gear under test 30; the arc-shaped measuring block 16 is an arc-shaped strip with uniform thickness, and the starting scale value of the measuring ruler 18 is consistent with the distance from this scale line to the inner wall of the arc-shaped measuring block 16. In this way, during measurement, the diameter of the top circle of the gear under test 30 can be obtained by direct reading without the need to perform operations to subtract the distance, making the overall detection speed faster;

[0029] A push switch is fixedly installed in the middle of the handle. Multiple push switches can be set to control the rotation direction, start and stop of the servo motor, and the start and stop of the drive motor 5.

[0030] To improve the stability of the reciprocating movement and pushing process of the push plate 22, and thus improve the position stability of the measuring ruler 18, a number of limiting rotating rollers are arranged at equal intervals along the length direction of the push plate 22 on both the upper and lower sides of the push plate 22. The limiting rotating roller includes an intermediate pressing roller 24, and both ends of the intermediate pressing roller 24 are fixedly connected with side rollers 23. Roller grooves are formed on the edges of both the upper and lower sides of the push plate 22. The side rollers 23 on both sides of the limiting rotating roller are respectively arranged to roll in the two roller grooves. Through the limiting cooperation of the roller grooves on the side rollers 23, the lateral displacement of the push plate 22 is hindered, improving the lateral stability of the measuring ruler 18.

[0031] A synchronous tooth groove is formed between the two roller grooves, and pressing roller tooth grooves are formed on the outer walls of a number of intermediate pressing rollers 24. The pressing roller tooth grooves are engaged with the synchronous tooth groove. One side of the limiting rotating roller close to the inner wall of the push box 19 is fixedly connected with the inner wall of the push box 19 through a connecting rod, and a transmission gear 26 is fixedly connected to the middle of the connecting rod; a number of transmission gears 26 located on both sides of the push plate 22 are arranged in one-to-one correspondence and are meshed and connected. Through the meshing of the transmission gears 26 at corresponding positions, the rotation of the upper and lower limiting rotating rollers is kept synchronous. By using the meshing of the intermediate pressing roller 24 and the synchronous tooth groove, the longitudinal pressure of the push plate 22 and the measuring ruler 18 can be conducted and dispersed to a number of limiting rotating rollers, avoiding the longitudinal offset of the push plate 22 and the measuring ruler 18 due to being pushed during the measurement process and improving the measurement accuracy.

[0032] To improve the connection stability of the docking plate 20 to the push plate 22, thrust pressing members are fixedly connected to both sides of the inner wall of the docking plate 20. The thrust pressing member includes a pressing spring 27, one end of the pressing spring 27 is fixedly connected with a roller frame, and a pressing roller 25 is rotatably connected to the inner wall of the roller frame. The bottom of the pressing roller 25 is in contact with the push plate 22;

[0033] In order to facilitate the rotation and displacement of the gear during multiple measurements, the top of the measuring frame 1 is slidably provided with an adjustment mechanism for adjusting the posture of the gear 30 to be measured, and the adjustment mechanism includes a support frame 2. Both sides of the top of the measuring frame 1 are provided with sliding grooves. The support frame 2 is set as an inverted U-shaped bracket, and the two ends of the bottom thereof are respectively slidably connected to the inner walls of the two sliding grooves;

[0034] The top of the support frame 2 is slidably connected to a connecting bottom plate 7, the top of the connecting bottom plate 7 is slidably connected to a supporting plate 4, the bottom of the supporting plate 4 is fixedly connected to a plurality of guide rods, and the plurality of guide rods are slidably connected to the connecting bottom plate 7, a driving motor 5 is fixedly installed on the top of the supporting plate 4, the output end of the driving motor 5 is fixedly connected to a transmission rod 6, and the bottom of the transmission rod 6 is fixedly connected to a limiting member for limiting support of the gear 30 to be tested;

[0035] The limiting member includes a limiting sleeve 10, the outer wall of which is fixedly connected with a plurality of tightening spring sheets 11, one end of each of which is bent toward the middle of the limiting sleeve 10 and fixedly connected with a contact sheet 14; a boss is fixedly connected to the middle of the inner wall of the limiting sleeve 10, a return spring is fixedly connected to the top of the boss, a push-up round table 13 is fixedly connected to the top of the return spring, and the push-up round table 13 is set in a round table shape with a bottom surface larger than the top surface; the side wall of the push-up round table 13 is fitted with the plurality of contact sheets 14, and a pressing ring 12 is fixedly connected to the top of the push-up round table 13;

[0036] To facilitate fixing the position of the limit member during the detection process, an adjusting shift groove 3 is provided in the middle of the support frame 2, and a positioning tooth groove is provided on one side of the inner wall of the adjusting shift groove 3. Positioning plates 8 are fixedly connected to both sides of the connecting base plate 7, and positioning push-pull grooves are provided in the middle of the two positioning plates 8. Push-pull plates 9 are slidably connected to the inner walls of the positioning push-pull grooves, and a positioning tooth plate 15 is fixedly connected to the bottom of the push-pull plate 9. A positioning tooth plate 15 is provided at one end of the positioning tooth plate 15 close to the positioning tooth groove. When adjusting, the support plate 4 is slid along the adjusting shift groove 3 to achieve movement of the limit member. When fixing is required, the push-pull plate 9 is pushed so that the positioning tooth plate 15 is butt-engaged with the positioning tooth groove to achieve fixation of the connecting base plate 7, thereby achieving fixation of the position of the limit member.

[0037] The end of the measuring frame 1 away from the grip is snap-connected with a hanging frame, a hanging slot is provided in the middle of the hanging frame, and a digital indicator 29 is slidably mounted on the inner wall of the hanging slot.

[0038] One side of the digital indicator 29 and both sides of the support frame 2 are fixedly connected with support angle plates 28. The middle part of the support angle plate 28 is threadedly connected with a positioning bolt, and the top of the positioning bolt is fixedly connected with a positioning knob. By turning the positioning knob, the positioning bolt is pressed down and tightened against the inner wall of the hanging groove or the inner wall of the sliding groove, thereby realizing the displacement and fixation of the digital indicator 29 and the support frame 2.

[0039] When the present invention is in use, it is taken by the grip, driving the measuring frame 1 and the whole device to move to the position where the gear 30 to be measured is located, so that one side of the gear 30 to be measured is in close contact with the inner wall side of the measuring frame 1 away from the measuring ruler 18. The servo motor is started by pressing the switch, driving the pushing gear 21 to rotate, and then driving the pushing plate 22 to move, driving the measuring ruler 18 to move, and pushing the measuring contact member to move towards the gear 30 to be measured until the arc-shaped measuring block 16 contacts and presses against the gear 30 to be measured. The reading of the measuring ruler 18 is read. Then, the servo motor is controlled by the control switch to drive the measuring ruler 18 and the arc-shaped measuring block 16 to retract and separate from the gear 30 to be measured. Then, the gear 30 to be measured is rotated, and the switch is pressed again to control the servo motor to start, driving the measuring ruler 18 and the measuring contact member to move towards the gear 30 to be measured, and measuring again. The reading of the measuring ruler 18 is recorded. Then, multiple measurement operations can be repeated according to the detection requirements, and the average value of the obtained readings is obtained to get the addendum circle diameter of the gear 30 to be measured;

[0040] When the gear 30 to be measured is in a state where the central tooth hole has been opened, the rotation of the gear 30 to be measured can be assisted and adjusted by the adjusting mechanism. The specific operation is as follows: Slide the support frame 2 and the connecting base plate 7 so that the limiting member is aligned with the top of the central tooth hole of the gear 30 to be measured. Press the supporting plate 4 so that the transmission rod 6 drives the limiting member to descend and penetrate into the central tooth hole, and the central tooth hole is tightened by several tightening elastic pieces 11. The driving motor 5 drives the transmission rod 6 and the limiting member to rotate, and then drives the gear 30 to be measured to rotate, which is convenient for multiple addendum circle diameter measurement operations;

[0041] When it is necessary to check the radial runout of the gear, the hanging bracket can be clamped with the measuring frame 1, the detection head of the digital display indicator 29 is slid and adjusted to be connected with the inside of the tooth groove, and then the attitude of the gear 30 to be measured is rotated and adjusted for multiple measurements. The readings are directly read by the digital display indicator 29. After multiple measurements, the gear radial runout tolerance is calculated, and GB / T10095.2-2001 is queried to judge the applicability of the gear.

[0042] After the measurement is completed, pull the supporting plate 4 to lift the transmission rod 6 and the limiting member. When the pressing ring 12 at the top of the limiting sleeve contacts the bottom of the support frame 2, drive the pushing frustum 13 to press down, so that several contact elastic pieces retract, reducing the frictional resistance between the central tooth hole, and separating the gear 30 to be measured from the limiting member.

[0043] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. Odd gear addendum circle measurer, characterized in that, It includes a measuring frame (1). A measuring ruler (18) is slidably connected to the side wall of the measuring frame (1). One end of the measuring ruler (18) is fixedly connected with a measuring contact member. The measuring contact member includes an arc-shaped measuring block (16) for contacting the outer circle of the gear to be measured (30). The radian of the arc-shaped measuring block (16) is the same as the tooth top radian of the gear to be measured (30). The value of the starting scale line of the measuring ruler (18) is the same as the distance from the starting scale line to the inner wall of the arc-shaped measuring block (16). A pushing and measuring mechanism is arranged on one side of the measuring frame (1). The pushing and measuring mechanism includes a pushing box (19). One side of the inner wall of the pushing box (19) is fixedly connected with a docking plate (20). A pushing plate (22) is slidably connected inside the docking plate (20). A pushing tooth groove is opened on one side of the pushing plate (22). A servo motor is fixedly installed on one side of the inner wall of the pushing box (19). The output end of the servo motor is fixedly connected with a pushing gear (21). One side of the pushing gear (21) is meshed and connected with the pushing tooth groove. One end of the pushing plate (22) is fixedly connected with the measuring ruler (18). A number of limiting rollers are arranged on both sides of the pushing plate (22). The limiting roller includes an intermediate pressing roller (24). Side rollers (23) are fixedly connected to both ends of the intermediate pressing roller (24). Roller grooves are opened on the upper and lower edges of both sides of the pushing plate (22). A synchronous tooth groove is opened between the two roller grooves. Pressing roller tooth grooves are opened on the outer walls of a number of the intermediate pressing rollers (24). The pressing roller tooth grooves are meshed with the synchronous tooth groove. One side of the limiting roller is fixedly connected with the inner wall of the pushing box (19) through a connecting rod. A transmission gear (26) is fixedly connected to the middle of the connecting rod. A number of transmission gears (26) on both sides of the pushing plate (22) correspond to each other and are meshed and connected. Thrust pressing members are arranged on both sides of the inner wall of the docking plate (20). The thrust pressing member includes a pressing spring (27). One end of the pressing spring (27) is fixedly connected with a roller frame. A pressing roller (25) is rotatably connected to the inner wall of the roller frame. The bottom of the pressing roller (25) is in fit contact with the pushing plate (22).

2. The odd gear addendum circle measurer according to claim 1, wherein An adjusting mechanism for adjusting the attitude of the gear to be measured (30) is slidably arranged on the top of the measuring frame (1). The adjusting mechanism includes a support frame (2). A connecting bottom plate (7) is slidably connected to the top of the support frame (2). A supporting plate (4) is slidably connected to the top of the connecting bottom plate (7). A driving motor (5) is fixedly installed on the top of the supporting plate (4). The output end of the driving motor (5) is fixedly connected with a transmission rod (6). A limiting member for limiting and supporting the gear to be measured (30) is fixedly connected to the bottom of the transmission rod (6).

3. The odd gear addendum circle measurer according to claim 2, characterized in that The limiting member includes a limiting sleeve (10), and a plurality of abutting elastic pieces (11) are fixedly connected to the outer wall of the limiting sleeve (10). One ends of the plurality of abutting elastic pieces (11) are bent and fixedly connected with contact pieces (14); a boss is fixedly connected to the middle of the inner wall of the limiting sleeve (10), a return spring is fixedly connected to the top of the boss, and a pushing frustum (13) is fixedly connected to the top of the return spring; the side wall of the pushing frustum (13) is attached to the plurality of contact pieces (14), and a pressing ring (12) is fixedly connected to the top of the pushing frustum (13).

4. The odd gear addendum circle measuring device according to claim 2, wherein An adjustment displacement groove (3) is formed in the middle of the support frame (2). A positioning tooth groove is formed in one side of the inner wall of the adjustment displacement groove (3). Positioning plates (8) are fixedly connected to both sides of the connecting bottom plate (7). Positioning push-pull grooves are formed in the middle of the two positioning plates (8). A push-pull plate (9) is slidably connected to the inner wall of the positioning push-pull groove. A positioning tooth plate (15) is fixedly connected to the bottom of the push-pull plate (9). Positioning teeth are formed at one end of the positioning tooth plate (15) close to the positioning tooth groove.

5. The odd gear addendum circle measuring device according to claim 1, characterized in that, One end of the measuring frame (1) is snap-connected with a hanging frame. A hanging chute is formed in the middle of the hanging frame. A digital display indicator (29) is slidably installed on the inner wall of the hanging chute.

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