External tooth M value measuring instrument

Abstract

The utility model discloses an external tooth M value measuring instrument which comprises a base, a test gear is arranged above the base, two sides of the test gear are provided with a first measuring rod and a second measuring rod, the first measuring rod is fixedly installed in the base, a sliding block is arranged below the second measuring rod, a sliding rail is arranged in the base, and the sliding rail is connected with the test gear. The second measuring rod is in sliding connection with the sliding rail through the sliding block, the first measuring rod is fixed in the base, the second measuring rod can slide in the base, the distance changed during measurement is accurately transmitted to the dial indicator for reading through the sliding rail and the sliding block, the handle is operated and moved during measurement, and a tested gear is placed at a measurement position. When the first measuring rod loosens the handle, the spring contracts, the second measuring rod contacts with the opposite tooth socket of the product, the contraction strength of the spring can perform self-centering on the tooth socket of the tested gear through the second measuring rod, and accurate measurement is performed, so that the detection tool which is convenient in detection, high in efficiency, high in precision and stable in detection result is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of M value measuring instruments, in particular to an external gear M value measuring instrument. Background Art

[0002] Gears refer to mechanical elements on the wheel rim that transmit motion and power through continuous meshing of gear teeth. For gear transmission structures, since power transmission is achieved through mutual meshing, the meshing accuracy between gears will directly affect the transmission efficiency of the transmission structure. Therefore, after processing, the actual tooth thickness and the length of the gear teeth need to be inspected and measured with a gear tooth micrometer. However, if the tooth thickness tolerance band is relatively small, the M value is used. This method is to measure after the change in tooth thickness is enlarged, so the accuracy is more accurate and is not affected by the deviation of the tooth groove.

[0003] The existing gear micrometers for measuring the M-value of gear external teeth have low measurement efficiency. Some M-value measuring instruments are relatively single for precise positioning of gears and are not compatible with multiple gears. If the product is replaced, another M-value measuring instrument must be replaced, thereby increasing the number of M-value measuring instruments and resulting in higher detection costs. Utility Model Content

[0004] The purpose of the utility model is to provide an external gear M value measuring instrument to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an external gear M value measuring instrument, comprising a base, a test gear is provided above the base, a first measuring rod and a second measuring rod are provided on both sides of the test gear, the first measuring rod is fixedly installed in the base, a slider is provided under the second measuring rod, a slide rail is provided in the base, the second measuring rod is slidably connected to the slide rail through the slider, and a slide groove is provided on the base.

[0006] As a further preferred embodiment of the present technical solution, a handle is provided in the base, the handle is slidably connected to the base via a slide groove, the handle is rotatably connected to the slider, a spring is provided in the base, a positioning rod is provided in the base, the spring is fixedly connected to the handle, the end of the spring away from the handle is fixedly connected to the positioning rod, a micrometer is embedded in the base, and the left side of the slider is in contact with the measuring end of the micrometer.

[0007] As a further preferred embodiment of the present technical solution, a mounting seat is provided in the base, a first mounting rod is provided on the mounting seat, the number of the first mounting rods is set in two groups, the two groups of the first mounting rods are symmetrically distributed, a second mounting rod is provided in the mounting seat, the number of the second mounting rods is set in two groups, the two groups of the second mounting rods are symmetrically distributed, the two groups of the first mounting rods and the second mounting rods are both slidably connected to the mounting seat, the first mounting rod and the second mounting rod are both sleeved with rollers, a gear is provided in the mounting seat, and a motor is provided in the mounting seat.

[0008] As a further preferred embodiment of the present technical solution, a first rack and a second rack are respectively mounted on the first mounting rod and the second mounting rod, and the first rack and the second rack are respectively slidably connected to the mounting seat via a sliding bar.

[0009] As a further preferred embodiment of the present technical solution, there are two groups of gears, the two groups of gears are respectively meshed and connected with the first rack and the second rack, the two groups of gears are rotatably connected with the mounting seat through a mounting shaft, and the mounting shaft is connected to the output end of the motor.

[0010] As a further preferred embodiment of the present technical solution, limit blocks are provided on both sides of the mounting seat, and limit slots are provided in the base. There are two groups of limit slots, and the two groups of limit slots are provided corresponding to the limit blocks. The mounting seat is slidably connected to the base through the limit blocks.

[0011] The utility model provides an external gear M value measuring instrument, which has the following beneficial effects:

[0012] (1) The first measuring rod of the utility model is fixed in the base, and the second measuring rod can slide in the base. The changing distance during measurement is accurately transmitted to the reading on the micrometer through the slide rail and the slider. When measuring, the moving handle is operated to put the test gear into the measurement position. The tooth groove corresponds to the first measuring rod. The handle is released, the spring contracts, and the second measuring rod contacts the opposite tooth groove of the product. The contraction force of the spring can be used by the second measuring rod to self-center the tooth groove of the test gear, and accurate measurement is performed to achieve a test fixture with convenient detection, high efficiency, high precision and stable detection results.

[0013] (2) The utility model sets two groups of first mounting rods and second mounting rods to determine the center position of the test gear on the base, so as to ensure that the same position accuracy is high when different test gears are placed, and reduce the problem of low M value measurement accuracy caused by eccentricity when the test gears are placed; a motor is set to drive the mounting shaft to rotate, so that the two groups of gears rotate synchronously, and when the two groups of gears rotate, they respectively drive the first racks on both sides and drive the two groups of first mounting rods to slide relative to or towards each other, and the second racks on both sides respectively drive the two groups of second mounting rods to slide relative to or towards each other, and by adjusting the distance between the two groups of first mounting rods and the two groups of second mounting rods, they can be used for test gears with different inner diameters, and the simultaneous movement of the two groups of first racks and the second racks ensures that the center of the circle formed by the two groups of first mounting rods and the second mounting rods is always located at the axis of the mounting shaft, so as to ensure the center position of the placement of different test gears for the measurement of M value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the second measuring rod of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the mounting seat of the utility model;

[0017] Figure 4 For the utility model Figure 3 -A magnified view of the structure;

[0018] In the figure: 1. base; 2. test gear; 3. first measuring rod; 4. second measuring rod; 5. slider; 6. slide rail; 7. handle; 8. positioning rod; 9. spring; 10. micrometer; 11. measuring end; 12. slide groove; 13. mounting seat; 14. limit block; 15. limit groove; 16. first mounting rod; 17. first rack; 18. slide bar; 19. roller; 20. gear; 21. mounting shaft; 22. motor; 23. second mounting rod; 24. second rack. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figure 1 and Figure 2As shown, in this embodiment, an external gear M value measuring instrument includes a base 1, a test gear 2 is provided above the base 1, a first measuring rod 3 and a second measuring rod 4 are provided on both sides of the test gear 2, the first measuring rod 3 is fixedly installed in the base 1, a slider 5 is provided below the second measuring rod 4, a slide rail 6 is provided in the base 1, the second measuring rod 4 is slidably connected to the slide rail 6 through the slider 5, a slide groove 12 is opened on the base 1, a handle 7 is provided in the base 1, the handle 7 is slidably connected to the base 1 through the slide groove 12, the handle 7 is rotatably connected to the slider 5, a spring 9 is provided in the base 1, a positioning rod 8 is provided in the base 1, the spring 9 is fixedly connected to the handle 7, and the end of the spring 9 away from the handle 7 is fixedly connected to the positioning rod 8, a micrometer 10 is embedded in the base 1, and the left side of the slider 5 is in contact with the measuring end 11 of the micrometer 10.

[0021] The first measuring rod 3 is fixed in the base 1, and the second measuring rod 4 can slide in the base 1. The distance changed during measurement is accurately transmitted to the reading on the micrometer 10 through the slide rail 6 and the slider 5. When measuring, the moving handle 7 is operated to put the test gear 2 into the measuring position. The tooth groove corresponds to the first measuring rod 3, and the handle 7 is released. The spring 9 contracts, and the second measuring rod 4 contacts the opposite tooth groove of the product. The contraction force of the spring 9 can be self-centered on the tooth groove of the test gear 2 by the second measuring rod 4, and accurate measurement is performed to achieve a detection tool with convenient detection, high efficiency, high precision and stable detection results.

[0022] like Figure 3 and Figure 4 As shown, a mounting seat 13 is provided in the base 1, and a first mounting rod 16 is provided on the mounting seat 13. The number of the first mounting rods 16 is set in two groups, and the two groups of first mounting rods 16 are symmetrically distributed. A second mounting rod 23 is provided in the mounting seat 13, and the number of the second mounting rods 23 is set in two groups, and the two groups of second mounting rods 23 are symmetrically distributed. The two groups of first mounting rods 16 and second mounting rods 23 are both slidably connected to the mounting seat 13, and rollers 19 are sleeved on the first mounting rods 16 and the second mounting rods 23. A gear 20 is provided in the mounting seat 13, and a motor 22 is provided in the mounting seat 13. The first mounting rod 16 and the second mounting rod 23 are respectively installed with The first rack 17 and the second rack 24 are slidably connected to the mounting seat 13 through the sliding bar 18 respectively. There are two groups of gears 20, and the two groups of gears 20 are respectively meshed with the first rack 17 and the second rack 24. Both groups of gears 20 are rotatably connected to the mounting seat 13 through the mounting shaft 21. The mounting shaft 21 is connected to the output end of the motor 22. Limit blocks 14 are provided on both sides of the mounting seat 13. Limit grooves 15 are provided in the base 1. There are two groups of limit grooves 15, and the two groups of limit grooves 15 are correspondingly arranged with the limit blocks 14. The mounting seat 13 is slidably connected to the base 1 through the limit blocks 14.

[0023] By setting two groups of first mounting rods 16 and second mounting rods 23 to determine the center position of the test gear 2 on the base 1, it is ensured that the co-location accuracy is high when different gears 2 are placed for testing, and the problem of low M value measurement accuracy caused by eccentricity when the test gear 2 is placed is reduced; by setting a motor 22 to drive the mounting shaft 21 to rotate, the two groups of gears 20 are rotated synchronously, and when the two groups of gears 20 rotate, they respectively drive the first racks 17 on both sides and drive the two groups of first mounting rods 16 to slide relative to or toward each other, and the second racks 24 on both sides respectively drive the two groups of second mounting rods 23 to slide relative to or toward each other, and by adjusting the distance between the two groups of first mounting rods 16 and the two groups of second mounting rods 23, they are used for test gears 2 with different inner diameters, and the simultaneous movement of the two groups of first racks 17 and the second racks 24 ensures that the center of the circle formed by the two groups of first mounting rods 16 and the second mounting rods 23 is always located at the axis of the mounting shaft 21, so as to ensure the center position of the placement of different gears 2 for testing, so as to measure the M value.

[0024] The utility model provides an external gear M value measuring instrument, and the specific working principle is as follows: a first measuring rod 3 is fixed in a base 1, and a second measuring rod 4 can slide in the base 1, and the distance changed during measurement is accurately transmitted to the reading on the micrometer 10 through a slide rail 6 and a slider 5. When measuring, a moving handle 7 is operated to put a test gear 2 into a measuring position, and the tooth groove corresponds to the first measuring rod 3. The handle 7 is released, and a spring 9 contracts, and the second measuring rod 4 contacts the opposite tooth groove of the product. The contraction force of the spring 9 can be self-centering the tooth groove of the test gear 2 through the second measuring rod 4, and accurate measurement is performed to achieve a convenient detection, high efficiency, high precision and stable detection result inspection tool, and two sets of first mounting rods 16 and second mounting rods 23 are provided to determine the center position of the test gear 2 on the base 1 to ensure that different test gears 2 are placed The same-position accuracy is high, and the problem of low M value measurement accuracy caused by eccentricity when the test gear 2 is placed is reduced; the motor 22 is set to drive the installation shaft 21 to rotate, so that the two groups of gears 20 rotate synchronously, and when the two groups of gears 20 rotate, they respectively drive the first racks 17 on both sides and drive the two groups of first installation rods 16 to slide relative to or toward each other, and the second racks 24 on both sides respectively drive the two groups of second installation rods 23 to slide relative to or toward each other, and by adjusting the distance between the two groups of first installation rods 16 and the two groups of second installation rods 23, it is used for test gears 2 with different inner diameters, and the simultaneous movement of the two groups of first racks 17 and the second racks 24 ensures that the center of the circle formed by the two groups of first installation rods 16 and the second installation rods 23 is always located at the axis of the installation shaft 21, so as to ensure the center position of different test gears 2 for the measurement of M values.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An external gear M value measuring instrument, comprising a base (1), characterized in that: A test gear (2) is provided above the base (1), a first measuring rod (3) and a second measuring rod (4) are provided on both sides of the test gear (2), the first measuring rod (3) is fixedly installed in the base (1), a slider (5) is provided below the second measuring rod (4), a slide rail (6) is provided in the base (1), the second measuring rod (4) is slidably connected to the slide rail (6) via the slider (5), and a slide groove (12) is provided on the base (1).

2. The external gear M value measuring instrument according to claim 1, characterized in that: The base (1) is provided with a handle (7), the handle (7) is slidably connected to the base (1) through a slide groove (12), the handle (7) is rotatably connected to the slider (5), the base (1) is provided with a spring (9), the base (1) is provided with a positioning rod (8), the spring (9) is fixedly connected to the handle (7), one end of the spring (9) away from the handle (7) is fixedly connected to the positioning rod (8), a micrometer (10) is embedded in the base (1), and the left side of the slider (5) is in contact with the measuring end (11) of the micrometer (10).

3. The external gear M value measuring instrument according to claim 1, characterized in that: The base (1) is provided with a mounting seat (13), and a first mounting rod (16) is provided on the mounting seat (13). The number of the first mounting rods (16) is two groups, and the two groups of the first mounting rods (16) are symmetrically distributed. The mounting seat (13) is provided with a second mounting rod (23), and the number of the second mounting rods (23) is two groups, and the two groups of the second mounting rods (23) are symmetrically distributed. The two groups of the first mounting rods (16) and the second mounting rods (23) are both slidably connected to the mounting seat (13), and the first mounting rods (16) and the second mounting rods (23) are both sleeved with rollers (19). The mounting seat (13) is provided with a gear (20), and the mounting seat (13) is provided with a motor (22).

4. The external gear M value measuring instrument according to claim 3, characterized in that: The first mounting rod (16) and the second mounting rod (23) are respectively mounted with a first rack (17) and a second rack (24); the first rack (17) and the second rack (24) are respectively slidably connected to the mounting seat (13) via a sliding bar (18).

5. The external gear M value measuring instrument according to claim 3, characterized in that: The number of the gears (20) is two groups, and the two groups of gears (20) are respectively meshed with the first rack (17) and the second rack (24), and the two groups of gears (20) are rotatably connected to the mounting seat (13) through a mounting shaft (21), and the mounting shaft (21) is connected to the output end of the motor (22).

6. The external gear M value measuring instrument according to claim 3, characterized in that: Limit blocks (14) are provided on both sides of the mounting seat (13); a limit slot (15) is provided in the base (1); the limit slots (15) are provided in two groups; the two groups of limit slots (15) are provided corresponding to the limit blocks (14); the mounting seat (13) is slidably connected to the base (1) via the limit blocks (14).

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