Nut run-out measuring shaft

Abstract

The utility model provides a nut runout measuring shaft. The nut jerk value measuring shaft comprises a standard shaft, a rotating part is fixed on one side of the standard shaft and used for rotating the standard shaft during measurement, the standard shaft comprises a step surface, the diameter of the step surface is sequentially reduced from one end close to the rotating part to one end far away from the rotating part, an external thread is arranged on the outer side of the step surface, and the diameter of the step surface is smaller than that of the rotating part. The nut is used for being in threaded connection with nuts of different sizes, and the nuts are sleeved with nut sleeves. The device can accurately measure the perpendicularity of the center hole of the nut through the bounce value displayed by the measuring meter, and is simple in structure, high in precision and high in universality.

Description

Technical Field

[0001] This utility model relates to a nut runout measuring shaft. Background Technology

[0002] Nuts are widely used, and the precision requirements for nuts at the drive shaft connection end are quite strict. If the perpendicularity of the center hole of the nut does not meet the standard after production, it will result in a large eccentricity of the drive shaft. Whether the perpendicularity of the center hole meets the requirements requires a relatively professional test. Existing high-precision measurement of the perpendicularity of the center hole of the nut is cumbersome and inconvenient. Utility Model Content

[0003] In view of the shortcomings of existing measuring instruments, the technical problem to be solved by this utility model is to provide a nut runout measuring shaft that is simple in structure and convenient to measure.

[0004] To achieve the above objectives, according to one aspect of the present invention, the present invention is implemented through the following technical measures: a nut runout measuring shaft, comprising: a standard shaft, a rotating part fixed on one side of the standard shaft for rotating the standard shaft during measurement, the standard shaft including a stepped surface, the diameter of the stepped surface decreasing sequentially from the end near the rotating part to the end away from the rotating part, an external thread on the outer side of the stepped surface for threaded connection of nuts of different sizes, and a nut sleeve being provided on the outer side of the nut.

[0005] Furthermore, pin holes are provided at the center of both ends of the standard shaft for pin positioning on the instrument panel.

[0006] Furthermore, the outer surface of the nut sleeve is cylindrical, and the nut sleeve has a through hole and a nut model groove that matches the shape of the nut. The through hole and the nut model groove are connected, and the axis of the through hole and the nut model groove corresponds to the axis of the standard shaft. The through hole has an internal thread.

[0007] Furthermore, one end of the nut is a hexagonal prism and the other end is a cylinder. The cylinder is hollow inside, and its diameter is smaller than the longest diagonal of the hexagonal prism. The nut model groove is a hexagonal nut groove, and the nut model groove engages with the hexagonal prism of the nut.

[0008] Compared with the prior art, the advantages of this utility model are: it adopts a standard shaft plus nut sleeve to simulate the rotation of the nut in actual use, uses a relatively simple structure to measure the perpendicularity of the nut's center hole, and has strong versatility. Attached Figure Description

[0009] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0010] Figure 1 This is a schematic diagram of a nut runout measuring shaft structure according to the present invention.

[0011] Figure 2 This is an exploded schematic diagram of a nut runout measuring shaft according to the present invention.

[0012] Figure 3 This is a schematic diagram of the nut sleeve structure described in this utility model.

[0013] Explanation of reference numerals in the attached drawings: 1. Standard shaft; 2. Nut sleeve; 3. Ejector pin hole; 4. Rotating part; 5. Through hole; 6. Stepped surface; 7. Cylinder; 8. Nut mold groove; 9. Nut; 10. Hexagonal prism. Detailed Implementation

[0014] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0015] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "bottom", "top", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0016] Please refer to Figure 1 , Figure 2 , Figure 3 The nut runout measuring shaft provided in this embodiment includes: a standard shaft 1, a rotating part 4 fixed on one side of the standard shaft 1 for rotating the standard shaft 1 during measurement, the standard shaft 1 including a stepped surface 6, the diameter of the stepped surface 6 decreasing sequentially from the end near the rotating part 4 to the end away from the rotating part 4, the outer side of the stepped surface 6 having an external thread for threaded connection of nuts 9 of different sizes, and a nut sleeve 2 being provided on the outer side of the nut 9.

[0017] The standard shaft 1 has pin holes 3 at both ends of its shaft center for pin positioning on the instrument panel.

[0018] The outer surface of the nut sleeve 2 is cylindrical. The nut sleeve 2 has a through hole 5 and a nut model groove 8 that matches the shape of the nut 9. The through hole 5 and the nut model groove 8 are connected, and the axis of the through hole 5 and the nut model groove 8 corresponds to the axis of the standard shaft 1. The through hole 5 has an internal thread. The total runout tolerance of the outer surface of the nut sleeve 2 is no more than 0.05 mm.

[0019] The nut 9 has a hexagonal prism 10 at one end and a cylinder 7 at the other end. The cylinder 7 is hollow inside and its diameter is smaller than the longest diagonal of the hexagonal prism 10. The nut model groove 8 is a hexagonal nut 9 groove, and the nut model groove 8 is engaged with the hexagonal prism 10 of the nut 9.

[0020] The rotating part 4 has three stepped surfaces 6 on the left side, which are fitted with M8*1.25, M10*1, and M12*1.5 nuts 9 from left to right. The rotating part 4 has two stepped surfaces 6 on the right side, which are fitted with M12*1.75 and M10*1.25 nuts 9 from left to right.

[0021] When using the nut runout measuring shaft of this utility model, locate the external thread section on the standard shaft 1 corresponding to the measuring nut 9, screw the nut 9 to be measured onto the corresponding external thread section on the standard shaft 1, and fit the nut sleeve 2 onto the outside of the measuring nut 9. The outside of the nut 9 being measured fits into the polygonal nut model groove 8 inside the nut sleeve 2. The measuring needle of the measuring instrument rests on the cylindrical 7-shaped surface on the outside of the nut sleeve 2. Rotate the rotating part 4 of the standard shaft 1 to make the measuring needle slide on the cylindrical 7-shaped surface on the outside of the nut sleeve 2. The perpendicularity of the center hole of the nut 9 is judged according to the runout of the measuring instrument.

[0022] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various changes and modifications can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A nut runout measuring shaft, comprising: A standard shaft, wherein a rotating part is fixed on one side of the standard shaft for rotating the standard shaft during measurement, characterized in that the standard shaft includes a stepped surface, the diameter of which decreases sequentially from the end closer to the rotating part to the end farther away from the rotating part, and an external thread is provided on the outer side of the stepped surface for threaded connection of nuts of different sizes, and a nut sleeve is provided on the outer side of the nut.

2. The nut runout measuring shaft according to claim 1, characterized in that: The standard shaft has pin holes at both ends of the shaft center.

3. The nut runout measuring shaft according to claim 1, characterized in that: The outer surface of the nut sleeve is cylindrical, and the nut sleeve has a through hole and a nut model groove that matches the shape of the nut. The through hole and the nut model groove are connected, and the axis of the through hole and the nut model groove corresponds to the axis of the standard shaft. The through hole has an internal thread.

4. A nut runout measuring shaft according to claim 3, characterized in that: The nut has a hexagonal prism at one end and a cylinder at the other end. The cylinder is hollow inside and its diameter is smaller than the longest diagonal of the hexagonal prism. The nut model groove is a hexagonal nut groove that engages with the hexagonal prism of the nut.

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