Digital display internal gear micrometer

Abstract

The utility model discloses a digital display internal gear micrometer, which comprises a knurling cylinder, a fixed shell, measuring jaws, a micrometric screw, a transmission sleeve, a shaft sleeve, a guide sleeve, a grating, a digital display assembly and a micrometer frame, the measuring jaws comprise a fixed measuring jaw and a movable measuring jaw, and the fixed measuring jaw and the movable measuring jaw are correspondingly arranged. Symmetrical detachable measuring heads are arranged on the fixed measuring jaw and the movable measuring jaw, and the measuring heads on the fixed measuring jaw and the movable measuring jaw face opposite directions; the measuring head comprises a measuring head and a threaded connecting rod, the fixed measuring jaw and the movable measuring jaw are respectively provided with threaded holes corresponding to the threaded connecting rod, and the measuring head is in threaded connection with the fixed measuring jaw or the movable measuring jaw. The measuring head is replaced for measurement according to the internal gears of different sizes, the sizes of the internal gears of different modulus can be measured more accurately, and the use is convenient and flexible.

Description

Technical Field

[0001] The utility model relates to the technical field of internal gear measuring tools, in particular to a digital display internal gear micrometer. Background Art

[0002] A gear micrometer is a measuring tool used to accurately measure the dimensions of internal gears. It typically consists of a scale frame, a micrometer screw, a fixed sleeve, a differential cylinder, a force-measuring device, and a measuring head (the part that contacts the internal gear for measurement). Utilizing the principle of a helical pair transmission, the micrometer screw is rotated to produce axial movement, enabling detailed readings of the measured dimensions. When the measuring head contacts the corresponding part of the internal gear, the displacement of the micrometer screw can be read on the LCD screen. Through precise scale conversion, it can be accurate to one thousandth of a millimeter, thus obtaining the exact dimensional value.

[0003] Most of the current gear micrometers are micrometers for measuring external gears and are not suitable for measuring internal gears. Since the measuring heads of existing gear micrometers are all fixed and the diameter of the measuring heads is fixed, they are not suitable for internal gears of different sizes. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a digital display internal gear micrometer.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A digital internal gear micrometer includes a knurled cylinder, a fixed shell, measuring jaws, a micrometer screw, a transmission sleeve, a shaft sleeve, a guide sleeve, a grating, a digital display assembly and a ruler frame. The measuring jaws include a fixed measuring jaw and a movable measuring jaw, and the fixed measuring jaw and the movable measuring jaw are arranged correspondingly. The fixed measuring jaw and the movable measuring jaw are provided with symmetrical detachable measuring heads, and the measuring heads on the fixed measuring jaw and the movable measuring jaw face oppositely.

[0007] The measuring head includes a measuring head and a threaded connecting rod. The fixed measuring jaw and the movable measuring jaw are respectively provided with threaded holes corresponding to the threaded connecting rod. The measuring head is threadedly connected to the fixed measuring jaw or the movable measuring jaw.

[0008] The fixed measuring jaw is fixed to the ruler frame through a shaft sleeve, the movable measuring jaw is fixed to the guide sleeve through a measuring jaw sleeve, the front end of the shaft sleeve is sleeved on the guide sleeve, the inside of the guide sleeve is movably connected to the micrometer screw through a threaded bushing, the micrometer screw is connected to the transmission sleeve through a dial and a screw, the outside of the transmission sleeve is connected to the knurled cylinder through a spring, a fixed shell is provided between the knurled cylinder and the ruler frame, and a grating is provided in the fixed shell.

[0009] The fixed shell and the fixed sleeve are connected to the scale frame, the fixed grating of the grating is fixed on the shaft sleeve, the movable grating of the grating is connected to the end of the transmission sleeve, the grating data is connected to the digital display component, and the digital display component is arranged on the fixed shell.

[0010] A stop screw is provided at the bottom of the movable measuring jaw to fix the measuring distance of the movable measuring jaw.

[0011] The front end of the guide sleeve is provided with an adjusting screw, which is used to adjust the gap between the threaded bushing and the guide sleeve; the front end of the measuring claw sleeve is provided with a plug, which is used to protect the measuring claw sleeve and the guide sleeve.

[0012] The rear end of the knurling cylinder is provided with a dust cap, and the rear end of the dust cap is provided with a tail cap.

[0013] The probe diameter of the measuring head is any one of 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, and 6.0mm, and its measuring range is capable of measuring the diameter pitch of the inner gear ring with a gear module of 0.6 to 3.5.

[0014] The beneficial effects of the utility model are as follows: the measuring head can be replaced according to the internal gears of different sizes, the sizes of the internal gears of different modules can be measured more accurately, and the use is convenient and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a half-section structural diagram of the utility model;

[0017] Figure 3 This is a structural diagram of the measuring head of the utility model;

[0018] In the figure: 1. knurled cylinder; 2. fixed shell; 3. digital display assembly; 4. fixed measuring jaw; 5. movable measuring jaw; 6. measuring head; 61. measuring head; 62. threaded connecting rod; 7. plug; 8. ruler frame; 9. stop screw; 10. dust cap; 11. tail cap; 12. micrometer screw; 13. dial; 14. transmission sleeve; 15. shaft sleeve; 16. guide sleeve; 17. fixed sleeve; 18. measuring jaw sleeve; 19. adjusting screw; 20. grating; 21. screw; 22. spring; 23. threaded bushing. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solution of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1

[0021] In conjunction with the drawings and descriptions of the drawings, the present invention provides a digital display internal gear micrometer, comprising a knurled cylinder 1, a fixed housing 2, measuring claws, a micrometer screw 12, a transmission sleeve 14, a shaft sleeve 15, a guide sleeve 16, a grating 20, a digital display assembly 3 and a ruler frame 8;

[0022] The measuring jaws include a fixed measuring jaw 4 and a movable measuring jaw 5, which are arranged correspondingly. The fixed measuring jaw 4 and the movable measuring jaw 5 are provided with symmetrical detachable measuring heads 6, and the measuring heads 6 on the fixed measuring jaw 4 and the movable measuring jaw 5 face oppositely; the measuring head 6 includes a measuring head 61 and a threaded connecting rod 62, and the fixed measuring jaw 4 and the movable measuring jaw 5 are respectively provided with threaded holes corresponding to the threaded connecting rod 62, and the measuring head 6 is threadedly connected to the fixed measuring jaw 4 or the movable measuring jaw 5; the fixed measuring jaw 4 is fixed to the ruler frame 8 through the shaft sleeve 15, and the movable measuring jaw 5 is fixed to the guide sleeve 16 through the measuring jaw sleeve 18, and a stop screw 9 is provided at the bottom of the movable measuring jaw 5; the front end of the shaft sleeve 15 is sleeved on the guide sleeve 16, and the guide sleeve 16 is movably connected to the micrometer screw 12 through the threaded bushing 23, and the micrometer screw 12 It is connected to the transmission sleeve 14 through a dial 13 and a screw 21. The outside of the transmission sleeve 14 is connected to the knurled cylinder 1 through a spring 22. A fixed shell 2 is provided between the knurled cylinder 1 and the ruler frame 8, and a grating 20 is provided in the fixed shell 2; the fixed sleeve 17 of the fixed shell 2 is connected to the ruler frame 8, the fixed grating of the grating 20 is fixed on the shaft sleeve 15, and the movable grating of the grating 20 is connected to the end of the transmission sleeve 14. The data of the grating 20 is connected to the digital display component 3, and the digital display component 3 is provided on the ruler frame 8; an adjusting screw 19 is provided at the front end of the guide sleeve 16, and the adjusting screw 19 is used to adjust the gap between the threaded bushing and the guide sleeve 16; a plug 7 is provided at the front end of the measuring claw sleeve 18, and the plug 7 is used to protect the measuring claw sleeve 18 and the guide sleeve 16; a dust cap 10 is provided at the rear end of the knurled cylinder 1, and a tail cap 11 is provided at the rear end of the dust cap 10;

[0023] The diameter of the probe 61 of the measuring head 6 is any one of 1.0, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, and 6.0 mm, and its measuring range is capable of measuring the diameter pitch of the internal gear ring with a gear module of 0.6 to 3.5;

[0024] Specific use:

[0025] To measure the internal gear module of 0.6 to 0.65, use a measuring head with a probe diameter of 1.0 mm;

[0026] To measure the internal gear module of 0.9 to 1.0, use a measuring head with a probe diameter of 1.5mm;

[0027] The module of the internal gear is 1.25, and a measuring head with a probe diameter of 2.0 mm is used;

[0028] The module of the internal gear is 1.5, and a measuring head with a probe diameter of 2.5 mm is used;

[0029] The module of the internal gear is 1.75, and a measuring head with a probe diameter of 3.0 mm is used;

[0030] To measure the internal gear with module 2, use a measuring head with a probe diameter of 3.5mm;

[0031] The module of the internal gear is 2.25, and a measuring head with a probe diameter of 4.0 mm is used;

[0032] The module of the internal gear is 2.5, and a measuring head with a probe diameter of 4.5 mm is used;

[0033] The module of the internal gear is 2.75, and a measuring head with a probe diameter of 5.0 mm is used;

[0034] To measure the internal gear module of 3.5, use a measuring head with a probe diameter of 6.0mm;

[0035] Structural principle: Fix the ruler frame on the table, rotate the knurled cylinder to drive the micrometer screw, thereby adjusting the movement of the movable measuring jaw for measurement, and the measured data is displayed on the digital display assembly.

Claims

1. A digital internal gear micrometer, characterized by: It includes a knurled cylinder, a fixed shell, measuring jaws, a micrometer screw, a transmission sleeve, a shaft sleeve, a guide sleeve, a grating, a digital display assembly and a ruler frame. The measuring jaws include a fixed measuring jaw and a movable measuring jaw, and the fixed measuring jaw and the movable measuring jaw are arranged correspondingly. The fixed measuring jaw and the movable measuring jaw are provided with symmetrical detachable measuring heads, and the measuring heads on the fixed measuring jaw and the movable measuring jaw face oppositely.

2. A digital internal gear micrometer according to claim 1, characterized in that: The measuring head includes a measuring head and a threaded connecting rod. The fixed measuring jaw and the movable measuring jaw are respectively provided with threaded holes corresponding to the threaded connecting rod. The measuring head is threadedly connected to the fixed measuring jaw or the movable measuring jaw.

3. A digital internal gear micrometer according to claim 2, characterized in that: The fixed measuring jaw is fixed to the ruler frame through a shaft sleeve, the movable measuring jaw is fixed to the guide sleeve through a measuring jaw sleeve, the front end of the shaft sleeve is sleeved on the guide sleeve, the inside of the guide sleeve is movably connected to the micrometer screw through a threaded bushing, the micrometer screw is connected to the transmission sleeve through a dial and a screw, the outside of the transmission sleeve is connected to the knurled cylinder through a spring, a fixed shell is provided between the knurled cylinder and the ruler frame, and a grating is provided in the fixed shell.

4. A digital internal gear micrometer according to claim 3, characterized in that: The fixed shell and the fixed sleeve are connected to the scale frame, the fixed grating of the grating is fixed on the shaft sleeve, the movable grating of the grating is connected to the end of the transmission sleeve, the grating data is connected to the digital display component, and the digital display component is arranged on the fixed shell.

5. A digital internal gear micrometer according to claim 4, characterized in that: The bottom of the movable measuring jaw is provided with a stop screw; the front end of the guide sleeve is provided with an adjusting screw, and the front end of the measuring jaw sleeve is provided with a plug.

6. The digital internal gear micrometer according to claim 5, characterized in that: The probe diameter of the measuring head is any one of 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, and 6.0 mm.

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