Special gauge for height of top chamfer of ear hole of fork part

Abstract

The utility model relates to the technical field of gauges, and particularly discloses a special gauge for the height of a top chamfer of an earhole of a fork part, which comprises a measuring mandrel and an angle block, the angle block is in sliding fit with the measuring mandrel, and a dial indicator is mounted on the angle block; a rectangular through groove and through holes are formed in the measuring mandrel in the radial direction in a penetrating mode, the through holes are formed in the two sides of the rectangular through groove respectively, the rectangular through groove and the through holes are arranged in parallel, and hollowed-out notches are formed in the positions, located at the ends of the through holes, of the surface of the measuring mandrel; rectangular columns are arranged at the lower ends of the angle blocks. Four degrees of freedom of the angle block are controlled at one time through matched limiting of the angle block and the measuring mandrel, and the two opened degrees of freedom are just used for measuring the chamfering height. The value A is directly zero-set and benchmarked on the measuring mandrel, so that standard components are saved; the device can detect the chamfer height of a fork part on site, does not need to be frequently submitted for detection, greatly shortens the detection time, improves the output rate, avoids the angle distortion risk caused by misreading and loosening, and guarantees the quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to a testing fixture technical field, especially a special testing fixture for the height of the top chamfer of the ear hole of a fork type part. BACKGROUND

[0002] The top chamfer of the ear hole of a transmission shaft fork type part is mainly to ensure that the transmission shaft assembly meets the rotation angle requirement, to avoid interference, so a certain angle is turned on the top of the ear hole of the fork type part, to leave a certain space for rotation, since the measured chamfer is the intersection of the top of the two ear holes and the height of the center line of the ear hole, when the fork type part is detected, the angle is measured by a universal angle gauge, and the height is usually sent for detection, three coordinate detection is adopted, so that the height of the top chamfer of the ear hole of the fork type part is sent for detection for a long time, the quality fluctuation risk caused by equipment and tool wear and other reasons cannot be found in time, the yield is affected, and the angle of the top of the ear hole is measured by the universal angle gauge, there are angle distortion phenomena caused by misreading and loosening of the angle gauge, which causes trouble to production. SUMMARY

[0003] The utility model discloses a special testing fixture for the height of the top chamfer of the ear hole of a fork type part.

[0004] The utility model discloses a special testing fixture for the height of the top chamfer of the ear hole of a fork type part.

[0005] A special testing fixture for the height of the top chamfer of the ear hole of a fork type part, including measuring mandrel and angle block, angle block sliding cooperation is in measuring mandrel, and the dial indicator is installed on angle block, the rectangular through groove and the through hole are set up in the radial direction of measuring mandrel, and one place is set up on both sides of the rectangular through groove, and the rectangular through groove and the through hole are parallelly set up, and the hollow gap is set up on the surface of measuring mandrel and is located the through hole end part, the rectangular column is set up to angle block lower extreme, and the V type end face that crosses upwards is set up to angle block and is located the rectangular column both sides, and the upper and lower measuring surfaces of angle block are all horizontal surfaces.

[0006] Further setting: the rectangular column is integrally formed with the angle block, and the rectangular column is slidingly connected with the rectangular through groove.

[0007] Further setting: after the rectangular column is inserted into the rectangular through groove, the lower measuring surface of the angle block corresponds to the hollow gap.

[0008] Further setting: the dial indicator holder is installed on one side of the angle block through the screw, and the locking screw for locking the dial indicator is screw-connected on the dial indicator holder.

[0009] Further setting: the included angle between the V-shaped end face of the angle block and the upper generatrix of the measuring mandrel is the top turning angle B of the fork-shaped part, the upper intersection of the V-shaped end face coincides with the upper measuring surface of the angle block, when the lower measuring surface of the angle block is attached to the opposite surface of the hollow notch, the distance from the center of the measuring mandrel to the upper measuring surface of the angle block is value A, and the distance between the upper measuring surface and the lower measuring surface of the angle block is A minus the radius of the measuring mandrel.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] Through the cooperation and limiting of the angle block and the measuring mandrel, four degrees of freedom of the angle block are controlled at one time, and the two openings are used for measuring the chamfer height; the A value is directly set to zero on the measuring mandrel, so that the standard part is saved; the chamfer height of the fork-shaped part can be detected on site, so that the detection frequency is reduced, the detection time is greatly shortened, the output rate is improved, the angle distortion risk caused by misreading and loosening is avoided, and the quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0013] Figure 1 It is a detection state structure schematic view of the special gauge of the top chamfer height of the ear hole of the fork-shaped part described in the utility model;

[0014] Figure 2 It is an angle block structure schematic view of the special gauge of the top chamfer height of the ear hole of the fork-shaped part described in the utility model;

[0015] Figure 3 It is a structure schematic view of the measuring mandrel of the special gauge of the top chamfer height of the ear hole of the fork-shaped part described in the utility model;

[0016] Figure 4 It is a top view structure schematic view of the measuring mandrel of the special gauge of the top chamfer height of the ear hole of the fork-shaped part described in the utility model;

[0017] Figure 5 It is a structure schematic view of the dial gauge to zero state of the special gauge of the top chamfer height of the ear hole of the fork-shaped part described in the utility model.

[0018] The signs in the drawings are explained as follows:

[0019] 1. Measuring mandrel; 11. Rectangular through slot; 12. Through hole; 13. Hollowed-out notch; 2. Angle block; 21. Rectangular column; 22. V-shaped end face; 23. Dial indicator holder; 3. Dial indicator; 31. Locking screw; 4. Fork-shaped parts. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] like Figures 1-5 As shown, a special inspection tool for measuring the chamfer height of the top of the ear hole of a fork-type part includes a measuring mandrel 1 and an angle block 2. The angle block 2 is slidably fitted on the measuring mandrel 1, and a dial indicator 3 is mounted on the angle block 2. A dial indicator holder 23 is mounted on one side of the angle block 2 by screws. A locking screw 31 is threadedly connected to the dial indicator holder 23 to lock and fix the dial indicator 3. The locking screw 31 facilitates the position adjustment of the dial indicator 3 on the dial indicator holder 23.

[0024] In the embodiment: the measuring mandrel 1 is provided with a rectangular through slot 11 and a through hole 12 in the radial direction, the through hole 12 is arranged at both sides of the rectangular through slot 11, the rectangular through slot 11 and the through hole 12 are arranged in parallel, and the hollow gap 13 is arranged at the end of the through hole 12 on the surface of the measuring mandrel 1; the rectangular column 21 is integrally formed with the angle block 2, and the rectangular column 21 is in sliding fit with the rectangular through slot 11; after the angle block 2 is used in cooperation with the measuring mandrel 1, the lower measuring surface of the angle block 2 corresponds to the hollow gap 13, the rectangular through slot 11 facilitates the cooperation with the angle block 2, and the through hole 12 allows the fork-shaped part 4 to be inserted through the measuring mandrel 1.

[0025] In the embodiment: the rectangular column 21 is arranged at the lower end of the angle block 2, the rectangular column 21 is inserted into the rectangular through slot 11, the rectangular through slot 11 limits the angle block 2 in four directions, the V-shaped end surface 22 that crosses upwards is arranged at both sides of the rectangular column 21 on the angle block 2, and the upper and lower measuring surfaces of the angle block 2 are both horizontal surfaces. The included angle between the V-shaped end surface 22 of the angle block 2 and the upper generatrix of the measuring mandrel 1 is the top turning angle B of the fork-shaped part 4, the upper intersection point of the V-shaped end surface 22 coincides with the upper measuring surface of the angle block 2, when the lower measuring surface of the angle block 2 is attached to the opposite surface of the hollow gap 13, the distance from the center of the measuring mandrel 1 to the upper measuring surface of the angle block 2 is the value A, and the distance between the upper and lower measuring surfaces of the angle block 2 is A minus the radius of the measuring mandrel 1.

[0026] The working principle and the use process of the utility model: before use, first, the dial indicator 3 is zeroed, the rectangular column 21 of the angle block 2 is inserted into the rectangular through slot 11 of the measuring mandrel 1, the hollow gap 13 of the measuring mandrel 1 faces downwards, the two lower measuring surfaces of the angle block 2 coincide with the outer circular generatrix of the measuring mandrel 1, the dial indicator 3 is mounted and adjusted to press the small pointer by 1mm, and the dial indicator 3 is locked by the locking screw 31; since A is previously machined to have a middle tolerance, the dial indicator 3 after zeroing is A; as long as the dial indicator 3 zero position is within the A tolerance band, it is within the range of qualified products.

[0027] The hollow gap 13 of the measuring mandrel 1 faces upwards (away from the angle block 2), is inserted into the ear hole of the fork-shaped part 4, and the rectangular column 21 of the angle block 2 is aligned with the rectangular through slot 11 of the measuring mandrel 1 and is put in, at this time, since the V-shaped end surface 22 of the angle block 2 is just at the hollow gap 13, the position of the measuring mandrel 1 is appropriately adjusted left and right, so that the two end chamfers at the top of the ear hole of the fork-shaped part 4 directly contact the V-shaped end surface 22 of the angle block 2, and whether the contact angle B of the two V-shaped end surfaces 22 is consistent is observed, at this time, the short pointer of the dial indicator 3 should be at the position of 1mm, the long pointer is at the zero position, the greater the value, the smaller the height A value, and the smaller the value, the greater the height A. The dial indicator 3 zero position can be painted green (A tolerance band), and the pointer within the green range is a qualified product, otherwise it is a unqualified product.

[0028] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A special inspection tool for measuring the chamfer height at the top of the ear hole of a fork-type part, characterized in that: Including measuring mandrel (1) and angle block (2), the angle block (2) is slidably fitted on the measuring mandrel (1), and a dial indicator (3) is installed on the angle block (2); The rectangular through slot (11) and the through hole (12) are arranged in the radial direction of the measuring mandrel (1), one of the through hole (12) is arranged on both sides of the rectangular through slot (11), the rectangular through slot (11) and the through hole (12) are arranged in parallel, the surface of the measuring mandrel (1) is provided with a hollow notch (13) at the end of the through hole (12); The lower end of the angle block (2) is provided with a rectangular column (21), the angle block (2) is provided with upward crossing V-shaped end face (22) on both sides of the rectangular column (21), and the upper and lower measuring surfaces of the angle block (2) are horizontal surfaces.

2. A special purpose gage for determining the height of the top chamfer of a fork member ear hole according to claim 1, characterized in that: The rectangular column (21) is integrally formed with the angle block (2), and the rectangular column (21) is slidably fitted with the rectangular through slot (11).

3. A special purpose gage for determining the height of the top chamfer of a fork member ear hole according to claim 2, wherein: After the rectangular column (21) is inserted into the rectangular through slot (11), the lower measuring surface of the angle block (2) corresponds to the hollow notch (13).

4. A special purpose gage for determining the height of the top chamfer of an ear hole of a fork member according to claim 1, characterized in that: The dial indicator holder (23) is installed on one side of the angle block (2) through screws, and the locking screw (31) for locking and fixing the dial indicator (3) is threadedly connected to the dial indicator holder (23).

5. A special purpose gage for determining the height of the top chamfer of an ear hole of a fork member according to claim 3, characterized in that: The angle between the V-shaped end face (22) of the angle block (2) and the upper generatrix of the measuring mandrel (1) is the top turning angle B of the fork-shaped part (4), the upper intersection of the V-shaped end face (22) coincides with the upper measuring surface of the angle block (2), when the lower measuring surface of the angle block (2) is attached to the opposite surface of the hollow notch (13), the distance from the center of the measuring mandrel (1) to the upper measuring surface of the angle block (2) is value A, and the distance between the upper measuring surface and the lower measuring surface of the angle block (2) is A minus the radius of the measuring mandrel (1).

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