CN209978803U

CN209978803U - Device for rapidly testing symmetry degree of key groove

Info

Publication number: CN209978803U
Application number: CN201921073085.0U
Authority: CN
Inventors: 马爱民; 胡西科
Original assignee: Tianjin Railway Signal Co Ltd
Current assignee: Tianjin Railway Signal Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-01-21
Anticipated expiration: 2029-07-10

Abstract

The utility model provides a device of quick inspection keyway symmetry, including location detection piece and picture peg, the center department of location detection piece opens the inspection hole that runs through around having, the lower terminal surface of inspection hole is the V profile, form left side observation face and the right side observation face that cross and bilateral symmetry at the lower extreme, it has the perpendicular guide way to open directly over the intersection of left side observation face and right side observation face, extend to the up end of location detection piece, perpendicular guide way and inspection hole intercommunication, enough place work piece axle and work piece axle in the space of inspection hole have sufficient space of floating in the inspection hole, the groove width of perpendicular guide way and the thick phase-match of board of picture peg, the picture peg inserts perpendicular guide way from location detection piece upper end, finally insert in the epaxial keyway of work piece in the inspection hole. The utility model provides a problem that axle and keyway symmetry are not convenient for detect, simple structure, convenient operation are swift, the testing result is reliable, low in manufacturing cost has improved work efficiency greatly moreover.

Description

Device for rapidly testing symmetry degree of key groove

Technical Field

The utility model belongs to the machining inspection field especially relates to a device of quick inspection keyway symmetry.

Background

The gear shaft is a key part of the conduction force in the manual switch assembly of the railway signal switch machine product, the appearance of the gear shaft is a stepped shaft with a thick middle part and thin two ends, a key groove is arranged on the thick shaft in the middle of the stepped shaft, the symmetry degree of the key groove and the axis is a key factor influencing the assembly of the gear shaft and related parts, and the symmetry degree of the key groove and the axis is inconvenient to detect based on a conventional detection tool, so that a special detection measuring tool needs to be designed to meet the use requirement.

Disclosure of Invention

In view of this, the present invention provides a device for rapidly checking the symmetry of a shaft and a key slot.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a device of short-term test keyway symmetry, detects piece and picture peg including the location, the center department that the location detected the piece opens the inspection hole that runs through around having, the lower terminal surface of inspection hole is the V profile, form left side observation face and the right side observation face that cross and bilateral symmetry at the lower extreme, it has perpendicular guide way to open directly over the intersection of left side observation face and right side observation face, extend to the up end that the location detected the piece, perpendicular guide way and inspection hole intercommunication, enough place work piece axle and work piece axle have sufficient space of floating in the inspection hole in the space of inspection hole, the groove width of perpendicular guide way and the thick phase-match of picture peg, the picture peg inserts perpendicular guide way from the location detection piece upper end, finally insert in the epaxial keyway of work piece in the inspection hole.

Furthermore, the cross section of the detection hole is pentagonal and comprises a left observation surface, a right observation surface, an upper end surface, a left end surface and a right end surface, and the vertical guide groove is located at the center line of the upper end surface.

Further, the positioning detection block is a rectangular body.

Further, the left and right observation planes have a symmetry with respect to the vertical guide groove of 1/5 to 1/3 which is a symmetry of the workpiece axis.

Compared with the prior art, a device of quick inspection keyway symmetry, following beneficial effect has: the problem that the symmetry degree of the shaft and the key groove is inconvenient to detect is solved, the structure is simple, the operation is convenient and fast, the detection result is reliable, the manufacturing cost is low, and the working efficiency is greatly improved.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic view of the present invention in use;

FIG. 2 is a schematic view of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a front view of the board

FIG. 5 is a side view of the insert plate;

FIG. 6 is a schematic view of the construction of the workpiece spindle;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6;

description of reference numerals:

1-a key slot; 2-positioning the detection block; 3, inserting a plate; 4-detection holes; 5-left observation plane; 6-right observation surface; 7-vertical guide groove; 8-workpiece axis.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1-5, a device for rapidly inspecting the symmetry of a key groove comprises a positioning detection block 2 and an insertion plate 3, a detection hole 4 which is penetrated through from front to back is formed in the center of the positioning detection block 2, the lower end face of the detection hole 4 is a V-shaped surface, a left observation surface 5 and a right observation surface 6 which are crossed at the lower end and are bilaterally symmetrical are formed, a vertical guide groove 7 is formed right above the crossed part of the left observation surface 5 and the right observation surface 6 and extends to the upper end face of the positioning detection block 2, the vertical guide groove 7 is communicated with the detection hole 4, a workpiece shaft 8 is sufficiently placed in the space of the detection hole 4, and the workpiece shaft 8 has a sufficient floating space in the detection hole 4, so that an unqualified workpiece is separated from a certain observation surface when the insertion plate is inserted into the key groove and is. The construction of the workpiece spindle 8 is shown in fig. 6-7.

The groove width of the vertical guide groove 7 is matched with the plate thickness of the inserting plate 3, and the inserting plate 3 is inserted into the vertical guide groove 7 from the upper end of the positioning detection block 2 and finally inserted into the key groove 1 on the workpiece shaft 8 in the detection hole 4.

The cross section of the detection hole 4 is pentagonal and comprises a left observation surface 5, a right observation surface 6, an upper end surface, a left end surface and a right end surface, and the vertical guide groove 7 is located at the center line of the upper end surface.

The positioning detection block 2 is a rectangular body, and the detection hole 4 is positioned in the center of the positioning detection block 2.

The left and

right observation planes

5 and 6 have a symmetry with respect to the vertical guide groove 7 of 1/5 to 1/3 which is the symmetry of the workpiece axis 8.

The inserting plate 3 is a plate-shaped part, the thickness dimension of the inserting plate is the minimum dimension of the key groove 1 of the workpiece to be measured minus the symmetry degree of the workpiece shaft and the key groove 1, and the width of the inserting plate is slightly smaller than the dimension of the key groove 1.

When the device is used, the detection block 2 is placed on a horizontal workbench, the workpiece shaft 8 to be detected is inserted into the detection hole 4 of the positioning detection block 2 of the device, part of the workpiece shaft 8 is contacted with the left observation surface 5 and the right observation surface 6 of the detection hole 4, the workpiece shaft 8 to be detected is rotated to enable the orientation of the key groove 1 of the workpiece shaft 8 to be detected to be consistent with that of the vertical guide groove 7, then the inserting plate 3 is guided and vertically inserted to the bottom of the key groove 1 of the workpiece shaft 8 to be detected through the vertical guide groove 7, if the symmetry of the workpiece shaft 8 to be detected and the key groove 1 to be detected is out of tolerance, the workpiece shaft 8 to be detected can float upwards along with the insertion of the inserting plate 3 to be separated from the left observation surface 5 or the right observation surface 6, at the moment, whether the workpiece shaft 8 to be detected has a clearance with the left observation surface 5 and the right observation surface 6 is observed, if one observation surface has a clearance, the symmetry of the workpiece shaft 8 to be detected and the key groove 1 to, the symmetry of the workpiece axis 8 to be examined is qualified.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a device of short-term test keyway symmetry which characterized in that: detect piece (2) and picture peg (3) including the location, the center department of location detection piece (2) opens inspection hole (4) that runs through around having, the lower terminal surface of inspection hole (4) is the V profile, form left observation face (5) and right observation face (6) that cross and bilateral symmetry at the lower extreme, it has perpendicular guide way (7) to open directly over the intersection of left observation face (5) and right observation face (6), extend to the up end of location detection piece (2), perpendicular guide way (7) and inspection hole (4) intercommunication, enough place work piece axle (8) and work piece axle (8) in inspection hole (4) have sufficient space of floating in the space of inspection hole (4), the groove width of perpendicular guide way (7) and the thick phase-match of picture peg (3), picture peg (3) insert perpendicular guide way (7) from location detection piece (2) upper end, finally insert in keyway (1) on the work piece axle (8) in inspection hole (4).

2. The apparatus for rapidly verifying key slot symmetry of claim 1, wherein: the cross section of the detection hole (4) is pentagonal and comprises a left observation surface (5), a right observation surface (6), an upper end surface, a left end surface and a right end surface, and the vertical guide groove (7) is located at the center line of the upper end surface.

3. The apparatus for rapidly verifying key slot symmetry of claim 2, wherein: the positioning detection block (2) is a rectangular body.

4. A device for rapidly verifying key slot symmetry according to any one of claims 1 to 3, wherein: the symmetry of the left observation surface (5) and the right observation surface (6) relative to the vertical guide groove (7) is 1/5-1/3 of the symmetry of the workpiece shaft (8).