Detection tool for detecting spherical radius of planetary gear

Abstract

The utility model belongs to the field of planetary gear detection, and particularly relates to a detection tool for detecting the spherical radius of a planetary gear. Comprising a metering cover and a detection block. The lower surfaces of the metering cover and the detection block are respectively connected with a detected planetary gear, the metering cover is provided with a dial indicator, the head of the dial indicator is connected with the upper surface of the detection block, and the change of the relative position between the metering cover and the detection block causes the change of the connection position of the head and the detection block, thereby causing the change of the reading of the dial indicator. The change of the reading represents the change of the spherical radius, and whether the detected planetary gear is a qualified product is determined according to the change of the reading.

Description

Technical Field

[0001] The utility model belongs to the field of planetary gear detection, in particular to a detection tool for detecting the spherical radius of a planetary gear. Background Art

[0002] The planetary gear is one of the important parts in the differential, and its large end face is a spherical surface. The spherical surface is the reference mating surface for the axial limit of the planetary gear in the installation position, and has high shape and position tolerance requirements. However, the tools and fixtures will inevitably have normal wear during the processing, and the installation errors caused by the replacement of tools and fixtures will naturally form manufacturing errors, resulting in reduced product quality. Therefore, it is necessary to check the manufacturing quality of the spherical surface during the processing, and adjust the parameters of the production tools appropriately based on the test results. The existing technology uses a three-coordinate measuring machine to accurately detect the spherical surface of the planetary gear. The three-coordinate measuring machine is a high-precision testing instrument with high testing conditions. It is not suitable for online testing at the production site, so it cannot be used as a measuring device for quality control in the production process. Therefore, a device that is easy to measure is needed to complete this task. Utility Model Content

[0003] The purpose of the utility model is to provide a gauge for detecting the spherical radius of a planetary gear to solve the problems existing in the prior art. To achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0004] A checking tool for checking the spherical radius of a planetary gear comprises a gauge cover and a checking block; the gauge cover is slidably connected to the checking block, the gauge cover and the lower surface of the checking block are respectively connected to a checked object, a micrometer is provided on the gauge cover, the dial gauge head is connected to the upper surface of the checking block, a change in the relative position between the gauge cover and the checking block causes a change in the connection position between the dial gauge head and the checking block, thereby causing a change in the reading of the micrometer.

[0005] Furthermore, a blind hole is provided at the bottom of the meter cover, and the detection block can be slidably connected in the blind hole.

[0006] Furthermore, a plurality of through holes are evenly arranged in the circumferential direction of the center of the top of the meter cover, and the through holes are connected to the blind holes; a plurality of threaded blind holes are arranged on the top of the detection block; a screw can be slidably connected in the through hole, and the screw is threadedly connected to the threaded blind hole.

[0007] Furthermore, it also includes a spring, the spring is sleeved on the screw rod, and the two ends of the spring are respectively connected to the lower surface of the meter cover and the upper surface of the detection block.

[0008] Furthermore, a column block is provided on the top of the meter cover, and a second through-hole penetrating the meter cover is provided on the column block, the second through-hole is connected to the blind hole, and a threaded through-hole is provided on the side wall of the column block; the micrometer is slidably provided in the second through-hole, and a screw is threadedly connected to the threaded through-hole and abuts against the micrometer.

[0009] Furthermore, the meter cover and the lower surface of the detection block are connected to the upper surface of the planetary gear, a positioning spindle is slidably provided in the inner hole of the planetary gear, a positioning spindle is provided with a positioning hole, and screw 2 passes through the positioning hole and cooperates with the detection block thread.

[0010] Furthermore, it also includes a base, and a limiting groove for placing the planetary gear is provided on the top of the base.

[0011] The utility model has the following beneficial effects: the device is provided with a meter cover and a detection block, a micrometer is provided on the meter cover, and the micrometer gauge head is connected to the detection block; the meter cover and the detection block are both placed on the planetary gear to be measured, and the different curvatures (spherical radii) of the surface of the planetary gear will cause the meter cover and the detection block to have different contact points with it, thereby changing the relative distance between the meter cover and the detection block, thereby changing the contact point of the gauge head, and changing the micrometer gauge reading, and finally comparing the spherical radius difference between the planetary gear to be measured and the standard planetary gear, thereby judging whether the planetary gear to be measured is a qualified product, and judging whether the production line needs to be adjusted. The device is simple and practical, does not require precise devices or harsh measurement conditions, and has low production costs and good measurement effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a front cross-sectional view of the device;

[0013] Figure 2 This is a top view of the watch cover;

[0014] Figure 3 It is the top view of the detection block. DETAILED DESCRIPTION

[0015] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] like Figure 1-3 As shown, a checking fixture for detecting the spherical radius of a planetary gear comprises a gauge cover 2 and a detection block 6; the gauge cover 2 is slidably connected to the detection block 6, the lower surfaces of the gauge cover 2 and the detection block 6 are respectively connected to the object to be detected, the gauge cover 2 is provided with a micrometer 4, the head 401 of the micrometer 4 is connected to the upper surface of the detection block 6, the relative position change between the gauge cover 2 and the detection block 6 causes the connection position of the head 401 and the detection block 6 to change, thereby causing the reading of the micrometer 4 to change.

[0018] Specifically, the upper surface of the planetary gear 9 is a spherical surface, and different spherical surface radii result in different curvatures of the upper surface, thereby changing the contact point between the meter cover 2 and the detection block 6 on the upper surface of the planetary gear 9. The final presentation effect of different spherical surface radii is (eg Figure 1 (as shown in the figure) the vertical distance between contact point 1 and contact point 2 changes, thereby the relative distance between the meter cover 2 and the detection block 6 changes, and the head 401 of the micrometer 4 will change the contact point with the upper surface of the detection block 6 due to the change in the relative distance between the meter cover 2 and the detection block 6, thereby changing the reading of the micrometer 4. The reading of the micrometer 4 of the standard planetary gear 9 is compared with the reading of the micrometer 4 of the planetary gear 9 of the measured part (the reading of the standard planetary gear 9 can be compared with "0" to facilitate the reading of the planetary gear 9 of the measured part), so as to determine whether the planetary gear 9 of the measured part is a qualified product, and then adjust the equipment on the production line accordingly.

[0019] like Figure 1-3As shown, the bottom of the meter cover 2 is provided with a blind hole 205, and the detection block 6 can be slidably connected in the blind hole 205. A plurality of through holes 201 are evenly arranged in the circumferential direction of the top center of the meter cover 2, and the through holes 201 are connected to the blind holes 205; a plurality of threaded blind holes 601 are arranged on the top of the detection block 6; the through holes 201 can be slidably connected to the screw rod 3, and the screw rod 3 is threadedly connected to the threaded blind hole 601. A spring 5 is also included, and the spring 5 is sleeved on the screw rod 3, and the two ends of the spring 5 are respectively connected to the lower surface of the meter cover 2 and the upper surface of the detection block 6. The meter cover 2 and the detection block 6 are preferably circular structures in top view, and their axis is consistent with the axis of the inner hole 901 of the planetary gear 9, the second through hole 203, and the positioning hole 701. The above coaxiality can make the side wall of the blind hole 205 of the meter cover 2 and the lower surface of the detection block 6 in the circumference contact with the planetary gear 9 (the gravity force point of the meter cover 2 and the detection block 6 is the contact point with the planetary gear 9, that is, the contact point of the detection block 6 and the meter cover 2 will not have a strong effect), preventing the error of the relative distance between the meter cover 2 and the detection block 6 caused by their own gravity, so as to facilitate the accuracy of measurement. The main function of the spring 5 is to support the meter cover 2, and its elasticity should not be too large. It is necessary to ensure that the meter cover 2 can contact the planetary gear 9 when measuring the spherical radius. The function of the screw 3 is to support and limit, and prevent the meter cover 2 and the detection block 6 from rotating relative to each other and affecting the measurement.

[0020] In addition, a column block 202 is provided on the top of the meter cover 2, and a second through hole 203 is provided on the column block 202, which penetrates the meter cover 2, and the second through hole 203 is connected to the blind hole 205. A threaded through hole 204 is provided on the side wall of the column block 202; the micrometer 4 is slidably provided in the second through hole 203, and a screw 1 is threadedly connected to the threaded through hole 204 and abuts against the micrometer 4. The screw 1 is used to fix the position of the micrometer 4 to prevent its shaking from affecting the measurement result.

[0021] like Figure 1 As shown, the lower surface of the meter cover 2 and the detection block 6 are connected to the upper surface of the planetary gear 9, and a positioning mandrel 7 is slidably provided in the inner hole 901 of the planetary gear 9, and a positioning hole 701 is provided on the positioning mandrel 7, and a screw 8 passes through the positioning hole 701 and is threadedly engaged with the detection block 6. The outer diameter of the positioning mandrel 7 is consistent with the diameter of the inner hole 901, and the axial centers of the positioning hole 701, the inner hole 901, the through hole 203, and the detection block are consistent. The positioning mandrel 7 of different sizes can be replaced according to the planetary gears 9 of different sizes.

[0022] In addition, a base 10 is also included. A limiting groove for placing the planetary gear 9 is provided on the top of the base 10. The limiting groove is used to limit the movement of the planetary gear 9.

[0023] Working principle: When working, first place the standard planetary gear 9 on the base 10, then fix the position of the micrometer 4 so that the gauge head contacts the upper surface of the detection block 6, then fix the detection block 6 and the positioning mandrel 7, and then insert the positioning mandrel 7 into the inner hole 901, and align the reading of the micrometer 4 with '0'; take out the positioning mandrel 7, replace the planetary gear 9 to be tested, insert the positioning mandrel 7, read the reading of the micrometer 4, compare the reading according to the set range, and determine whether the planetary gear 9 to be tested is a qualified product, so as to judge whether the production line needs to be adjusted.

[0024] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A test fixture for detecting the spherical radius of a planetary gear, characterized by: The invention comprises a meter cover (2) and a detection block (6); the meter cover (2) and the detection block (6) are slidably connected; the lower surfaces of the meter cover (2) and the detection block (6) are respectively connected to the object to be detected; a micrometer (4) is provided on the meter cover (2); a dial head (401) of the micrometer (4) is connected to the upper surface of the detection block (6); a change in the relative position between the meter cover (2) and the detection block (6) causes a change in the connection position between the dial head (401) and the detection block (6), thereby causing a change in the reading of the micrometer (4).

2. A checking fixture for detecting the spherical radius of a planetary gear according to claim 1, characterized in that: The bottom of the meter cover (2) is provided with a blind hole (205), and the detection block (6) can be slidably connected in the blind hole (205).

3. A checking fixture for checking the spherical radius of a planetary gear according to claim 2, characterized in that: A plurality of through holes (201) are evenly arranged in the circumferential direction of the center of the top of the meter cover (2), and the through holes (201) are connected to the blind holes (205); a plurality of threaded blind holes (601) are arranged on the top of the detection block (6); a screw rod (3) can be slidably connected in the through hole (201), and the screw rod (3) is threadedly connected to the threaded blind hole (601).

4. A checking fixture for checking the spherical radius of a planetary gear according to claim 3, characterized in that: It also includes a spring (5), which is sleeved on the screw rod (3), and the two ends of the spring (5) are respectively connected to the lower surface of the meter cover (2) and the upper surface of the detection block (6).

5. The inspection tool for inspecting the spherical radius of a planetary gear according to claim 2, characterized in that: The top of the meter cover (2) is provided with a column block (202), the column block (202) is provided with a second through hole (203) penetrating the meter cover (2), the second through hole (203) is connected to the blind hole (205), and a threaded through hole (204) is provided on the side wall of the column block (202); the micrometer (4) is slidably provided in the second through hole (203), and the first screw (1) is threadedly connected to the threaded through hole (204) and abuts against the micrometer (4).

6. A checking fixture for checking the spherical radius of a planetary gear according to claim 1, characterized in that: The lower surfaces of the meter cover (2) and the detection block (6) are connected to the upper surface of the planetary gear (9); a positioning spindle (7) is slidably provided in the inner hole (901) of the planetary gear (9); a positioning hole (701) is provided on the positioning spindle (7); and a second screw (8) passes through the positioning hole (701) and then engages with the detection block (6) in a threaded manner.

7. A checking fixture for checking the spherical radius of a planetary gear according to claim 6, characterized in that: It also comprises a base (10), and a limiting groove for placing the planetary gear (9) is provided on the top of the base (10).

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