Tooth excircle testing fixture

Abstract

The utility model discloses a tooth excircle testing fixture. The tooth outer circle testing fixture comprises a measuring clamp, a dial indicator, a sleeve, a reset spring, an extension rod and an adjuster, the measuring clamp is provided with a measuring opening, the sleeve is arranged on the measuring clamp, the adjuster is arranged on the measuring clamp, the adjuster is used for adjusting the position of the sleeve on the measuring clamp, and the reset spring is arranged on the extension rod. The dial indicator, the reset spring and the extension rod are all arranged in the sleeve, a measuring needle of the dial indicator abuts against the extension rod, the reset spring is used for resetting the extension rod, the lower end of the extension rod penetrates through the sleeve and is located outside the sleeve, and the extension rod coincides with the center line of the measuring opening. According to the utility model, the measuring range can be adjusted, and the measuring range is large.

Description

Technical Field

[0001] The utility model relates to the technical field of gear outer circle detection, in particular to a gear outer circle detection tool. Background Art

[0002] After the spline shaft is processed, the outer tooth diameter of the gear part needs to be tested to ensure that the processing accuracy of the gear meets the requirements. Due to size limitations, the micrometer cannot detect the outer circle of the large diameter tooth part, and although the vernier caliper can detect relatively large objects, its detection accuracy is insufficient and cannot be used for products with high precision requirements. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tooth outer circle measuring tool with high precision and a larger measuring range than that of a micrometer.

[0004] In order to solve the above problems, the utility model provides a tooth external circle gauge, which includes a measuring clamp, a micrometer, a sleeve, a reset spring, an extension rod and an adjuster. The measuring clamp has a measuring opening, the sleeve is arranged on the measuring clamp, the adjuster is arranged on the measuring clamp, the adjuster is used to adjust the position of the sleeve on the measuring clamp, the micrometer, the reset spring and the extension rod are all arranged in the sleeve, the measuring needle of the micrometer abuts against the extension rod, the reset spring is used to reset the extension rod, the lower end of the extension rod passes through the sleeve and is located outside the sleeve, and the extension rod coincides with the center line of the measuring opening.

[0005] Furthermore, the measuring clamp comprises a mounting body and two measuring arms, the two measuring arms are symmetrically arranged on the mounting body, and a gap between the two measuring arms forms a measuring opening.

[0006] Furthermore, the measuring arm and the mounting body are formed integrally.

[0007] Furthermore, a receiving hole is provided on the installation body, and the axis center line of the receiving hole overlaps with the center line between the two measuring arms.

[0008] Furthermore, the regulator is provided with an internal thread, the sleeve is provided with an external thread, and the regulator is mounted on the measuring clamp via a bearing.

[0009] Furthermore, a limiting portion is provided on the sleeve, and the limiting portion cooperates with the measuring clamp to limit the rotation of the sleeve.

[0010] Furthermore, a hard alloy block is arranged on the measuring clamp, and a hard alloy block is arranged at the end of the extension rod, and the hard alloy block is used to contact the object to be measured.

[0011] Furthermore, the outer wall of the regulator is provided with anti-slip protrusions.

[0012] Furthermore, an anti-dropout portion is provided at the lower end of the sleeve, and the anti-dropout portion is used to limit the extension rod.

[0013] Furthermore, it also includes a placement box, on which a check fixture placement slot and a standard component placement slot are provided.

[0014] The utility model places a measuring clamp on the tooth part, and at the same time, an extension rod abuts against the outer edge of the tooth part and pushes the measuring needle of the micrometer, and judges whether the diameter of the tooth part meets the requirements according to the reading of the micrometer; the height of the sleeve is adjusted by the regulator, and the range of movement of the extension rod can be changed, thereby expanding the measuring range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred implementation of the tooth external circle checking fixture of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the utility model when the tooth outer circle checking fixture is measured.

[0017] Figure 3 It is a partial cross-sectional view of the tooth outer circle checking fixture of the utility model.

[0018] Figure 4 It is a partial cross-sectional view of the measuring clamp.

[0019] Figure 5 It is a schematic diagram of the structure of the casing.

[0020] The meanings of the symbols in the accompanying drawings are:

[0021] Measuring clamp 1, mounting body 11, limiting groove 111, measuring arm 12, micrometer 2, measuring needle 21, sleeve 3, limiting part 31, reset spring 4, extension rod 5, adjuster 6, bearing 60, anti-slip protrusion 61, placement box 7, spline shaft 81, tooth part 811, standard part 82, cemented carbide block 9. DETAILED DESCRIPTION

[0022] The utility model will be further described below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 3As shown, a preferred embodiment of the tooth external circle gauge of the utility model comprises a measuring clamp 1, a micrometer 2, a sleeve 3, a reset spring 4, an extension rod 5, an adjuster 6 and a placement box 7. The measuring clamp 1 has a measuring opening, and the tooth portion 811 of the spline shaft 81 is placed in the measuring opening for measurement. The sleeve 3 is arranged on the measuring clamp 1, and the adjuster 6 is arranged on the measuring clamp 1. The adjuster 6 is used to adjust the position of the sleeve 3 on the measuring clamp 1 to change the height of the sleeve 3. The micrometer 2, the reset spring 4 and the extension rod 5 are all arranged in the sleeve 3, the upper end of the reset spring 4 abuts on the micrometer 2, the lower end of the reset spring 4 abuts on the extension rod 5, the measuring needle 21 of the micrometer 2 abuts on the extension rod 5, the measuring needle 21 of the micrometer 2 is located in the reset spring 4, and the reset spring 4 is used to reset the extension rod 5. The end of the extension rod 5 is provided with a carbide block 9 to ensure that it will not be worn even if used multiple times under the detection of the same standard value, and there is no need to recalibrate the measurement benchmark. The lower end of the extension rod 5 passes through the sleeve 3 and is located outside the sleeve 3, so that the extension rod 5 can abut against the tooth portion 811 of the spline shaft 81; the extension rod 5 coincides with the center line of the measuring opening, so that the extension rod 5 overlaps with the diameter extension line of the tooth portion 811, so that the degree of the micrometer 2 is the difference from the standard value, and it can be directly judged whether the diameter of the tooth portion 811 meets the requirements. When measurement is required, the measuring clamp 1 is placed on the tooth portion 811 of the spline shaft 81, and the extension rod 5 abuts against the outer edge of the tooth portion 811 and pushes the measuring needle 21 of the micrometer 2 to complete the measurement, and judge whether the diameter of the tooth portion 811 meets the requirements based on the reading of the micrometer 2. The placement box 7 is provided with a gauge placement slot and a standard part 82 placement slot. When not measuring, the measuring clamp 1 and the parts arranged thereon are placed in the spacing placement slot, and the standard part 82 is placed in the standard part 82 placement slot. There can be multiple standard part 82 placement slots, and the number can be set as needed; in other embodiments, the shape of the standard part 82 can be set, such as Figure 1 The standard part 82 has three standard parts 82 of different diameters, which are integrated, and the number of standard diameters can also be set according to needs.

[0024] Combination Figure 4For reference, the measuring clamp 1 includes a mounting body 11 and two measuring arms 12. The two measuring arms 12 are symmetrically arranged on the mounting body 11. The gap between the two measuring arms 12 forms a measuring opening, so that the measuring opening is V-shaped and can adapt to spline shafts 81 of different diameters. When the length of the measuring arms 12 remains unchanged, the smaller the angle formed by the two measuring arms 12, the larger the diameter range that can be measured. The measuring arms 12 are integrally formed with the mounting body 11, which is convenient for processing and manufacturing. A cemented carbide block 9 is arranged on the measuring arm 12 of the measuring clamp 1. The cemented carbide block 9 is used to contact the object to be measured, ensuring that it will not be worn after multiple uses under the detection of the same standard value, and there is no need to recalibrate the measurement benchmark. A receiving hole is arranged on the mounting body 11, and the receiving hole is used to accommodate the sleeve 3. The axis of the receiving hole overlaps with the center line between the two measuring arms 12, so as to ensure that the extension rod 5 can be located in the middle position of the measuring opening. A limiting groove 111 is arranged in the receiving hole, and the limiting groove 111 limits the rotation of the sleeve 3.

[0025] The sleeve 3 is screwed on the regulator 6. Specifically, the regulator 6 is provided with an internal thread, and the sleeve 3 is provided with an external thread to facilitate the adaptation with the internal thread of the regulator 6. The sleeve 3 is matched with the internal thread through the external thread, and the sleeve 3 is screwed on the regulator 6. The regulator 6 is installed on the measuring clamp 1 through a bearing 60, so that the regulator 6 can be rotated. The outer wall of the regulator 6 is provided with an anti-slip protrusion 61, which is convenient for rotating the regulator 6 and prevents slipping when the regulator 6 is rotated.

[0026] Combination Figure 5 For reference, the sleeve 3 is provided with a limit portion 31, which is arranged along the axial direction of the sleeve 3. Usually, two limit portions 31 are set, and they are symmetrically arranged to facilitate balanced lifting and lowering of the sleeve 3. The limit portion 31 cooperates with the limit groove 111 of the measuring clamp 1 to achieve the purpose of limiting the rotation of the sleeve 3, so that the sleeve 3 can only be lifted when the adjuster 6 is rotated. In other embodiments, the sleeve 3 may not need to be provided with a limit portion 31, and the sleeve 3 can be rotated to allow the sleeve 3 to be lifted and lowered on the adjuster 6, and the height of the sleeve 3 may also be adjusted. If the micrometer 2 is rotated to a position that is inconvenient to view, the adjuster 6 can be rotated, and the adjuster 6 drives the sleeve 3 to rotate to a position that is convenient for viewing. It should be known that at this time, when the adjuster 6 rotates and drives the micrometer 2 to rotate, the sleeve 3 will not be upgraded. The lower end of the sleeve 3 is provided with an anti-slip portion, and the anti-slip portion is used to limit the extension rod 5.

[0027] The extension rod 5 is provided with an anti-dropping step, and the anti-dropping step is matched with the anti-dropping portion to ensure that the extension rod 5 cannot drop out of the sleeve 3 and can extend out of the sleeve 3 at the same time.

[0028] When in use, first place the measuring clamp 1 on the standard part 82 for calibration, and then clamp the measuring clamp 1 on the tooth portion 811 of the spline shaft 81. During the clamping process, the extension rod 5 abuts against the outer edge of the tooth portion 811 to push the micrometer 2, and judge whether the diameter of the tooth portion 811 meets the requirements based on the reading of the micrometer 2. When measuring spline shafts 81 of different standards, calibration is required before measurement to ensure that the measurement standard meets the requirements. When the measuring arm 12 of the measuring clamp 1 abuts against the outer edge of the tooth portion 811, but the extension rod 5 cannot abut against the outer edge of the tooth portion 811, the position of the sleeve 3 needs to be adjusted, and the adjuster 6 needs to be turned to allow the sleeve 3 to descend, so that the measuring arm 12 and the extension rod 5 can both abut against the outer edge of the tooth portion 811 at the same time. Or if the measuring arm 12 of the measuring clamp 1 cannot abut against the outer edge of the tooth portion 811, and the extension rod 5 abuts against the outer edge of the tooth portion 811, then the position of the sleeve 3 needs to be adjusted, and the adjuster 6 needs to be turned to raise the sleeve 3 so that the measuring arm 12 and the extension rod 5 can abut against the outer edge of the tooth portion 811 at the same time. In this way, the measuring range can be expanded.

[0029] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.

Claims

1. A tooth outer circle inspection tool, characterized in that: The utility model comprises a measuring clamp, a micrometer, a sleeve, a reset spring, an extension rod and an adjuster, wherein the measuring clamp has a measuring opening, the sleeve is arranged on the measuring clamp, the adjuster is arranged on the measuring clamp, the adjuster is used to adjust the position of the sleeve on the measuring clamp, the micrometer, the reset spring and the extension rod are all arranged in the sleeve, the measuring needle of the micrometer abuts against the extension rod, the reset spring is used to reset the extension rod, the lower end of the extension rod passes through the sleeve and is located outside the sleeve, and the extension rod coincides with the center line of the measuring opening.

2. The tooth outer circle checking fixture according to claim 1, characterized in that: The measuring clamp comprises a mounting body and two measuring arms. The two measuring arms are symmetrically arranged on the mounting body, and a gap between the two measuring arms forms a measuring opening.

3. The tooth outer circle checking fixture according to claim 2, characterized in that: The measuring arm is integrally formed with the mounting body.

4. The tooth outer circle checking fixture as claimed in claim 2, characterized in that: The installation body is provided with a receiving hole, and the axis center line of the receiving hole overlaps with the center line between the two measuring arms.

5. The tooth outer circle checking fixture according to claim 1, characterized in that: The adjuster is provided with an internal thread, the sleeve is provided with an external thread, and the adjuster is mounted on the measuring clamp through a bearing.

6. The tooth outer circle checking fixture according to claim 5, characterized in that: The sleeve is provided with a limiting portion, and the limiting portion cooperates with the measuring clamp to limit the rotation of the sleeve.

7. The tooth outer circle checking fixture according to claim 1, characterized in that: The measuring clamp is provided with a hard alloy block, and the end of the extension rod is provided with a hard alloy block, and the hard alloy block is used to contact with the object to be measured.

8. The tooth outer circle checking fixture according to claim 1, characterized in that: The outer wall of the regulator is provided with anti-slip protrusions.

9. The tooth outer circle checking fixture according to claim 1, characterized in that: An anti-dropout portion is provided at the lower end of the sleeve, and the anti-dropout portion is used to limit the extension rod.

10. The tooth outer circle checking fixture according to claim 1, characterized in that: It also includes a placement box, on which a check fixture placement slot and a standard component placement slot are provided.

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