Special detection tool for detecting shaft workpieces

Abstract

The utility model relates to the technical field of workpiece detection, in particular to a special detection tool for detecting shaft workpieces, which comprises a detection tool seat, a cavity with a downward opening is arranged on the inner side of the detection tool seat, a cushion block is arranged on the inner wall of the cavity, a positioning block is arranged at the bottom of the detection tool seat, and a mounting hole communicated with the cavity is arranged at the top of the detection tool seat. A fixing rod of the dial indicator is fixed on the testing fixture seat through the mounting hole, and a measuring shaft of the dial indicator extends into the cavity. The problem that the assembly quality and the assembly precision are affected due to low detection precision of shaft workpieces can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to work piece detection technical field, concretely is a special gauge for detecting shaft work piece. BACKGROUND

[0002] Shaft work piece is widely used in machinery, automobile, aerospace and other fields, and the geometric size of the shaft work piece is an important factor to ensure the assembly accuracy and assembly quality of the shaft work piece. If the axial assembly length of the shaft work piece exceeds the specified length, the work piece is difficult to be correctly installed in place, which affects the assembly quality and the stability of the entire mechanical system. The excessively long shaft work piece may also interfere with other components, resulting in the failure of the mechanical system to work normally. If the length cannot reach the specified length, the work piece may result in insufficient movement range and fail to complete the predetermined movement task, which affects the normal operation of the entire mechanical system. At present, the axial assembly length of the shaft work piece is usually detected by using digital height gauge, height meter and other instruments. However, this detection method is low in efficiency, highly dependent on the skills and experience of the operator during the detection process, and prone to detection result errors caused by misoperation, which is low in detection result precision, causes the failure of the shaft work piece, affects the assembly quality and assembly accuracy, and easily causes the assembly to stop, thereby affecting the production efficiency and increasing the production cost. SUMMARY

[0003] The utility model provides a special gauge for detecting shaft work piece can solve the detection precision of shaft work piece is low, the problem of affecting assembly quality and assembly accuracy.

[0004] The application provides the following technical scheme:

[0005] A special gauge for detecting shaft work piece, comprising a gauge seat, an open downward cavity is arranged on the inner side of the gauge seat, a pad is arranged on the inner wall of the cavity, a positioning block is arranged on the bottom of the gauge seat, an installation hole communicating with the cavity is arranged on the top of the gauge seat, a fixed rod of a micrometer is fixed on the gauge seat through the installation hole, and a measuring shaft of the micrometer extends into the cavity.

[0006] Beneficial effects: the cavity on the inner side of the gauge seat is used for placing the part to be detected of the shaft work piece, the pad and the positioning block jointly act to ensure the stability and accurate positioning of the shaft work piece, reduce the detection error, and ensure the detection precision. The fixed rod of the micrometer is fixed on the gauge seat through the installation hole, and the measuring shaft thereof extends into the cavity and contacts the end face of the shaft work piece. The axial assembly length of the shaft work piece can be accurately measured by using the high-precision measuring tool-micrometer, the accuracy of the measurement result is ensured, and then the assembly quality and assembly accuracy of the shaft work piece are ensured. The gauge structure of the technical scheme is simple in design and convenient to operate, can effectively reduce the human error, can quickly and accurately measure the work piece, is high in detection efficiency, improves the production efficiency, and reduces the production cost.

[0007] Further, the top of the gauge seat is uniformly distributed with a plurality of mounting holes.

[0008] Beneficial effect: The uniformly distributed mounting holes allow the fixed rod of the micrometer to be fixed at different positions, enabling measurement of multiple detection points, increasing measurement flexibility, and improving the versatility and application range of the gauge.

[0009] Further, the top of the gauge seat is provided with a threaded hole perpendicular to the mounting hole, the threaded hole being in communication with the mounting hole, and the threaded hole being threadedly connected with a bolt.

[0010] Beneficial effect: The threaded hole and the bolt can more firmly fix the fixed rod of the micrometer on the gauge seat, ensuring that the micrometer does not loosen or shift during measurement, and improving the stability and reliability of the measurement. Moreover, it can be applied to micrometers of various specifications, and has strong versatility.

[0011] Further, the mounting hole is provided with an elastic fastener, and one side of the elastic fastener is provided with an opening.

[0012] Beneficial effect: The elastic fastener can reduce the risk of damage to the fixed rod of the micrometer due to excessive force on a single point, prolonging the service life of the micrometer. The opening design on one side of the elastic fastener can facilitate installation and disassembly.

[0013] Further, the gauge seat is provided with a weight-reducing hole.

[0014] Beneficial effect: The weight-reducing hole can significantly reduce the weight of the gauge, making it easier for the operator to carry and detect the workpiece, saving time and effort, and improving detection efficiency. The weight-reducing hole also allows the operator to observe the inside of the gauge seat, improving the convenience and accuracy of the operation.

[0015] Further, the gauge seat is made of aluminum alloy material, the positioning block is made of steel material, and the spacer is made of nylon material.

[0016] Beneficial effect: The gauge seat is made of aluminum alloy material, ensuring the strength of the gauge while reducing its weight, making it easier to detect and carry. The positioning block is made of steel material, which has high hardness and strength, and can withstand a large pressure and impact, prolonging the service life of the gauge. The spacer is made of nylon material, which has good self-lubricating properties, reducing friction between the gauge and the workpiece, preventing the gauge from colliding with the workpiece, and effectively protecting the workpiece.

[0017] Further, it further comprises a standard part, and the standard part comprises a base, and the base is provided with an upright column extending upward vertically.

[0018] Beneficial effect: It is used for zeroing the micrometer, ensuring the accuracy of the gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of a first embodiment of a special inspection tool for inspecting shaft workpieces according to the present invention.

[0020] Figure 2 The utility model is a top view of a checking fixture seat of a first embodiment of a special checking fixture for checking shaft workpieces.

[0021] Figure 3 The bottom view is of a positioning block of a first embodiment of a special inspection tool for inspecting shaft workpieces according to the utility model.

[0022] Figure 4 This is a bottom view of the elastic fastener of Example 1 of a special inspection tool for inspecting shaft workpieces according to the utility model.

[0023] Figure 5 This is a diagram showing the coordination between the inspection tool and the workpiece in Embodiment 1 of a special inspection tool for inspecting shaft workpieces according to the utility model.

[0024] Figure 6 This is a diagram showing the coordination between the inspection tool and the standard part of the second embodiment of the special inspection tool for inspecting shaft workpieces of the present invention. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The symbols in the drawings of the specification include: a gauge seat 1, a cavity 2, a spacer block 3, a positioning block 4, a dial indicator 5, an elastic fastener 6, a weight-reducing hole 7, a standard part 8, a shaft workpiece 9, and a mounting hole 10.

[0027] Example 1

[0028] like Figures 1 to 5 As shown, a special gauge for detecting shaft workpieces includes a gauge seat 1 and a standard part 8. A cavity 2 with an opening facing downward is provided on the inner side of the gauge seat 1, a pad 3 is provided on the inner wall of the cavity 2, a positioning block 4 is provided at the bottom of the gauge seat 1, and a mounting hole 10 connected to the cavity 2 is provided at the top of the gauge seat 1. The fixing rod of the dial indicator 5 is fixed to the gauge seat 1 through the mounting hole 10, and the measuring axis of the dial indicator 5 extends into the cavity 2.

[0029] The gauge seat 1 is in a stepped cylindrical structure, the upper end is a small diameter section, the lower end is a large diameter section, and a transition section is arranged between the upper end and the lower end. An annular pad 3 is arranged on the inner wall of the cavity opening of the cavity 2 of the gauge seat 1, the pad 3 is fixedly connected with the inner wall of the cavity 2 in an interference fit, the pad 3 is inwardly convex, and when a workpiece is detected, the pad 3 can effectively avoid collision between the workpiece and the gauge. The positioning block 4 is in an annular structure, at least three stepped mounting holes are uniformly distributed on the positioning block 4, and the stepped mounting holes are used in cooperation with bolts to fix the positioning block 4 on the gauge seat 1. Four mounting holes 10 which are in communication with the cavity 2 are uniformly distributed on the top of the gauge seat 1, one of the mounting holes 10 is used to install a fixed rod of the micrometer 5, and the remaining mounting holes 10 can be used as spares so as to replace the mounting holes 10 when the mounting holes 10 are damaged, thereby prolonging the service life of the gauge. An elastic fastener 6 is arranged in each mounting hole 10, the elastic fastener 6 is in a cylindrical structure, an opening is arranged on one side of the cylindrical structure, in a natural state, the diameter of the outer periphery of the elastic fastener 6 is greater than the hole diameter of the mounting hole 10, the elastic fastener 6 is installed in the mounting hole 10 through elastic deformation, and is abutted against the inside of the mounting hole 10 under the action of the elastic force. Threaded holes which are perpendicular to the mounting holes 10 are arranged on the top of the gauge seat 1, the threaded holes are in communication with the mounting holes 10, the threaded holes are threadedly connected with bolts, the elastic fastener 6 in the mounting hole 10 is abutted and fixed by the bolts, and the elastic fastener 6 is deformed to fix the fixed rod of the micrometer 5 in the mounting hole 10. The side wall of the gauge seat 1 is provided with a lightening hole 7, specifically, at least three lightening holes 7 are uniformly distributed on the upper end of the side wall of the gauge seat 1 in a circumferential direction, and at least three lightening holes 7 are uniformly distributed on the lower end of the side wall in a circumferential direction. The gauge seat 1 is made of an aluminum alloy material, the positioning block 4 is made of a steel material (such as Cr12MoV steel material), and the pad 3 is made of a nylon material.

[0030] The standard part 8 comprises a base, the base is provided with a vertical column which extends upward, the column is a stepped column, the lower end of the column is a large diameter section, and the upper end of the column is a small diameter section. A clearance groove is arranged at the connection between the base and the column, and interference between the positioning block 4 and the base is avoided during detection.

[0031] The use method is as follows: the gauge seat 1 is sleeved on the standard part 8, the large diameter section of the standard part 8 is attached to the pad 3, the positioning block 4 is attached to the base, the gauge is perpendicular to the standard part 8, the measuring shaft of the micrometer 5 is attached to the top end of the standard part 8, the standard part 8 is measured, and the micrometer 5 is zeroed; after the micrometer 5 is zeroed, the gauge is used to measure the shaft workpiece 9; the gauge is sleeved on the shaft workpiece 9, the positioning block 4 is attached to the base of the shaft workpiece 9, the actual size of the shaft workpiece 9 is detected through the reading of the micrometer 5 which is the difference between the actual size of the shaft workpiece 9 and the size of the standard part 8, and the accuracy of the shaft workpiece 9 is ensured.

[0032] Example two

[0033] The difference between this embodiment and embodiment 1 is that a limit groove is provided at the cavity opening of the inspection fixture seat 1, the upper end of the limit groove is provided with a limit surface, and the lower end of the limit groove is flush with the cavity opening; the pad 3 is located in the limit groove, the upper end of the pad 3 is limited to the limit surface, and the lower end is limited to the positioning block 4.

[0034] Example 3

[0035] like Figure 6 As shown, the difference between this embodiment and the first embodiment is that at least three weight-reducing holes 7 are evenly distributed circumferentially on the side wall of the gauge base 1 , and the weight-reducing holes 7 span the upper end, the lower end and the transition section of the side wall.

[0036] The above is only an embodiment of the present invention. The present invention is not limited to the field involved in this implementation case. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A special inspection tool for inspecting shaft workpieces, characterized in that: It includes a gauge seat, a cavity with a downward opening provided on the inner side of the gauge seat, a pad provided on the inner wall of the cavity, a positioning block provided on the bottom of the gauge seat, a mounting hole provided on the top of the gauge seat and connected to the cavity, the fixing rod of the dial indicator is fixed to the gauge seat through the mounting hole, and the measuring axis of the dial indicator extends into the cavity.

2. The special inspection tool for inspecting shaft workpieces according to claim 1, characterized in that: A plurality of mounting holes are evenly distributed on the top of the inspection fixture seat.

3. The special inspection tool for inspecting shaft workpieces according to claim 1, characterized in that: A threaded hole perpendicular to the mounting hole is provided on the top of the inspection fixture seat. The threaded hole is communicated with the mounting hole, and the threaded hole is matched with the bolt thread.

4. The special inspection tool for inspecting shaft workpieces according to claim 1, characterized in that: An elastic fastener is provided in the mounting hole, and an opening is provided on one side of the elastic fastener.

5. The special inspection tool for inspecting shaft workpieces according to claim 1, characterized in that: The checking fixture seat is provided with a weight-reducing hole.

6. The special inspection tool for inspecting shaft workpieces according to claim 1, characterized in that: The inspection fixture seat is made of aluminum alloy material, the positioning block is made of steel material, and the cushion block is made of nylon material.

7. The special inspection tool for inspecting shaft workpieces according to claim 1, characterized in that: The utility model also comprises a standard part, wherein the standard part comprises a base, and a column extending vertically upward is provided on the base.

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