CN219433983U

CN219433983U - Key groove symmetry detection tool applicable to key groove in rotating shaft

Info

Publication number: CN219433983U
Application number: CN202320297466.7U
Authority: CN
Inventors: 贾超; 汪杰; 吴昱龙
Original assignee: Wuxi Original Mechanical & Electrical Co ltd
Current assignee: Wuxi Original Mechanical & Electrical Co ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-07-28
Anticipated expiration: 2033-02-23

Abstract

The utility model discloses a key slot symmetry detection tool applicable to a key slot on a rotating shaft, which comprises a main body arm, wherein a reference arm is arranged on the main body arm close to one end of the main body arm, the free end of the reference arm forms a reference end used for being supported on the bottom wall of a slot in the key slot to be detected, the main body arm is divided into a pressing arm on a short section side and a testing arm on a long section side through the reference arm, and the pressing arm and the testing arm are elastically deformed in a lever type by taking the reference arm as a fulcrum; spacing is provided with spacing arm in the benchmark arm on pressing the arm, spacing arm is pressed the spacing stroke of pressing the arm towards the interior elastic deformation of keyway that awaits measuring for the benchmark arm, be provided with the measuring table on the test arm, the measuring head of measuring table supports to press on the outer circumference wall of the pivot that awaits measuring, can simply quick detect the keyway of pivot work piece.

Description

Key groove symmetry detection tool applicable to key groove in rotating shaft

Technical Field

The utility model belongs to the field of workpiece detection, and particularly relates to a key slot symmetry detection tool applicable to a key slot on a rotating shaft.

Background

Currently, in the process of manufacturing a motor rotating shaft, a pseudo key method (also called a positioning block method) is used for measuring key grooves (GB/T1958-2004). Namely: preparing a false key, a lever dial indicator, a vernier height gauge, a measuring flat plate, a pair of V-shaped blocks, a miniature jack and other tools. The prepared dummy shaft is embedded into a key groove of the rotating shaft without gaps, the rotating shaft is arranged on a V-shaped block, the axis of the rotating shaft is guaranteed to be parallel to a flat plate and the V-shaped block, a lever dial indicator is used for leveling the dummy key, data at two ends of the key groove are measured, and a symmetry degree value is calculated through a formula f= DELTAbh/G.

The method has the defects that the process is complex and tedious, the method is not suitable for batch operation, and the key slot is easily damaged in the process of embedding and taking out the false key, so that the final quality is affected. Therefore, it is desirable to provide a tool that can simply and quickly detect a keyway.

Disclosure of Invention

The utility model aims to: in order to overcome the defects in the prior art, the utility model provides a key groove symmetry detection tool applicable to a key groove on a rotating shaft, which can simply and rapidly detect the key groove of a rotating shaft workpiece.

The technical scheme is as follows: in order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a be suitable for keyway symmetry detection frock of epaxial keyway, includes the main part arm, be close to its one end on the main part arm and be provided with the benchmark arm, the free end of benchmark arm constitutes the benchmark end that is used for supporting on the groove diapire in the keyway that awaits measuring, the main part arm passes through the benchmark arm and separates into the test arm of pressing the arm and the long section side of short section side, press arm, test arm and take the benchmark arm as the fulcrum and take lever elastic deformation; the device is characterized in that a limiting arm is arranged on the pressing arm at intervals on the reference arm, the limiting arm limits the stroke of the pressing arm towards the key slot to be tested relative to the reference arm and deforms elastically, a measuring meter is arranged on the testing arm, and a measuring head of the measuring meter is propped against the outer circumferential wall surface of the rotating shaft to be tested.

Furthermore, the limiting arms are arranged at parallel intervals on the reference arms, and in a state that the reference arms are supported on the bottom wall of the groove of the key groove to be detected, the limiting arms are arranged at intervals on the bottom wall of the groove of the key groove to be detected.

Furthermore, in the detection state, the limiting arm and the reference arm correspond to each other and extend into the key slot to be detected.

Further, the reference end is of a cylindrical structure with an axis parallel to the rotating shaft to be detected, and the diameter of the reference end is smaller than the groove depth of the key groove to be detected; in the detection state, the outer peripheral wall of the reference end is respectively contacted with the bottom wall and the side wall of the key groove to be detected.

Further, a supporting rod is arranged on the testing arm corresponding to the peripheral wall of the rotating shaft to be tested, one end of the supporting rod is connected to the testing arm, and the other end of the supporting rod contacts and supports the peripheral wall of the reversing rotating shaft.

Further, the support bar is adjustably positioned relative to the test arm in its length.

Further, the test arm is a bent rod body structure, the test arm comprises a connecting section and a mounting section, the mounting section is connected to the pressing arm through the connecting section, and the test meter is mounted on the mounting section.

Further, the test meter is arranged on the test arm in a far-near adjusting mode.

The beneficial effects are that: compared with the prior art, the tooling is ingenious in whole structure, convenient to operate, stable in performance, economical and applicable, and capable of saving a large amount of money for inputting special equipment. The key groove of the rotating shaft workpiece can be simply and rapidly detected. And damage to key grooves on the workpiece caused by dismounting and mounting the false key can be avoided, and the quality of the workpiece is ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model in a testing state;

fig. 2 is a schematic perspective view of the whole structure of the present utility model.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the tool for detecting symmetry of a key slot on a suitable rotating shaft comprises a main body arm, wherein a reference arm 1 is arranged on the main body arm near one end of the main body arm in an intersecting manner, a free end of the reference arm 1 forms a reference end 2 used for being supported on a bottom wall of a slot in the key slot to be detected, the reference end 2 is abutted against one side in the width direction of the key slot, the main body arm is divided into a pressing arm 3 on a short section side and a testing arm 4 on a long section side through the reference arm, the reference arm 1 is perpendicular to the pressing arm, and the pressing arm and the testing arm are elastically deformed in a lever type by taking the reference arm as fulcrums; the pressing arm 3 is provided with a limiting arm 5 at intervals on the reference arm, the limiting arm limits the stroke of the pressing arm towards the key groove to be measured relative to the reference arm and deforms elastically, the testing arm 4 is provided with a measuring meter 6, a measuring head 6a of the measuring meter is pressed against the outer circumferential wall surface of the rotating shaft to be measured, when the pressing arm is pressed manually, the testing arm changes relative to the reference arm in a lever type mode, the testing arm comprises a long section side and a short end side, the long section side and the short end side are used for amplifying the value change of the measuring meter, the testing arm and the measuring meter deflect towards one side far away from the rotating shaft 10, and the pressing force of the measuring head 6a pre-pressed on the outer wall of the rotating shaft relative to the rotating shaft is reduced, so that the value change of the measuring meter occurs.

The measuring and calculating method of the symmetry degree of the key groove of the cross section comprises the following steps: during measurement, the measuring end 2 is placed in a key groove to be measured and is tightly attached to one side plane and the bottom plane of the key groove; adjusting a measuring head of the measuring meter to ensure that the measuring head is pre-pressed on the outer wall surface of the rotating shaft so as to be suitable for the measurement; pressing the arm 3 until the top end of the limiting arm 5 is tightly attached to the bottom plane of the key groove, reading the data b1 of the measuring meter, and repeating the above action on the other side of the key groove to obtain the data b2, wherein the difference between the two is Deltab. Wherein, the prepressing degree of measuring head is the same when measuring twice, according to symmetry calculation formula: symmetry f= delta bh/G. Wherein h=d-G, D is the diameter value of the spindle to be measured; g is the length dimension from the bottom of the key groove to the outer peripheral wall surface in the diameter direction; h is the depth of the keyway.

The method for calculating the axial measurement and the asymmetry comprises the following steps: when in measurement, one end of the key slot is provided with the measuring end 2 which is arranged in the key slot to be measured and is tightly attached to one side plane and the bottom plane of the key slot; and regulating the pre-pressing of the measuring head of the measuring meter on the peripheral wall surface of the rotating shaft 10 to adapt to the measurement, pressing the pressing point until the top end of the limiting arm is tightly attached to the bottom plane of the key groove, reading the data a1 of the measuring meter, and repeating the actions on the other head on the same side of the key groove, wherein the pre-pressing degree of the measuring head is the same during the two measurements, so as to obtain data a2, and the difference value of the data a2 is delta a. At this time, Δa is the value of the axial asymmetry of the key slot.

The limiting arms 5 are arranged in parallel at intervals on the reference arm 1 and are positioned on the same side, and in a state that the reference arm 1 is supported on the bottom wall of the key slot 10a to be tested, the limiting arms 5 are spaced on the bottom wall of the key slot 10a to be tested, and the spacing is the deformation stroke of pressing the limiting arms by the pressing arms.

In the detection state, the limiting arm 5 and the reference arm 1 are corresponding to each other and extend into the key slot to be detected.

The reference end 2 is of a cylindrical structure with an axis parallel to the rotating shaft 10 to be measured, and the diameter of the reference end 2 is smaller than the groove depth of the key groove to be measured; in the detection state, the outer peripheral wall of the reference end 2 contacts the bottom wall and the side wall of the groove of the key groove 10a to be detected respectively, and the bottom wall and the side wall of the key groove are in line contact through the cylindrical surface, so that the close and stable fitting of the key groove is ensured.

The top end of the limiting arm 5 is a tip and is used for carrying out point contact on the bottom wall of the groove, so that measurement errors are reduced.

The test arm 4 is provided with a support rod 7 corresponding to the peripheral wall of the rotating shaft to be tested, one end of the support rod is connected to the test arm, and the other end of the support rod contacts the peripheral wall of the backing rotating shaft. The rotating shaft to be tested is supported through the supporting rods 7, so that the datum end 2 is more easily attached to the bottom wall and the side wall of the key slot, and the rotating shaft to be tested is guaranteed to be placed in place before testing.

The supporting rod 7 is arranged in a position adjustment manner relative to the test arm 4 in the length direction of the supporting rod so as to be suitable for rotating shafts to be tested with different outer diameter sizes, for example, the supporting rod 7 is in threaded adjustment with the test arm.

The test arm 4 is in a bent L-shaped folded rod body structure, the test arm 4 comprises a connecting section 41 and a mounting section 42, the mounting section 42 is connected to the pressing arm through the connecting section 41, the test meter 6 is mounted on the mounting section 42, and the pre-pressing direction of the test head 6a is parallel to the bottom wall of the key slot to be tested.

The test meter 6 damping pull type far and near adjustment is arranged on the test arm, a perforation is formed in the test arm corresponding to the test meter, and an elastic damping piece such as a rubber strip, a rubber sleeve and the like is arranged in the perforation.

The foregoing is only a preferred embodiment of the utility model, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims

1. Be suitable for keyway symmetry detection frock of keyway in pivot, its characterized in that: the device comprises a main body arm, wherein a reference arm (1) is arranged on the main body arm near one end of the main body arm, the free end of the reference arm (1) forms a reference end (2) which is used for being supported on the bottom wall of a groove in a key groove to be tested, the main body arm is divided into a pressing arm (3) on the short section side and a testing arm (4) on the long section side through the reference arm, and the pressing arm and the testing arm are elastically deformed in a lever type by taking the reference arm as a fulcrum; spacing arm (5) are arranged on the pressing arm (3) at intervals on the reference arm, the spacing arm limits the stroke of the pressing arm towards the key groove to be tested relative to the reference arm and deforms elastically, a measuring meter (6) is arranged on the testing arm (4), and a measuring head of the measuring meter is propped against the outer circumferential wall surface of the rotating shaft to be tested.

2. The tool for detecting symmetry of a key slot suitable for a key slot on a rotating shaft according to claim 1, wherein: the limiting arms (5) are arranged in parallel at intervals on the reference arms (1), and the limiting arms (5) are arranged at intervals on the bottom wall of the groove of the key groove (10 a) to be detected in a state that the reference arms (1) are supported on the bottom wall of the groove of the key groove (10 a) to be detected.

3. The tool for detecting symmetry of a key slot suitable for a key slot on a rotating shaft according to claim 1, wherein: in the detection state, the limiting arm (5) and the reference arm (1) correspond to each other and extend into the key slot to be detected.

4. The tool for detecting symmetry of a key slot suitable for a key slot on a rotating shaft according to claim 1, wherein: the reference end (2) is of a cylindrical structure with an axis parallel to the rotating shaft (10) to be detected, and the diameter of the reference end (2) is smaller than the groove depth of the key groove to be detected; in the detection state, the outer peripheral wall of the reference end (2) is respectively contacted with the bottom wall and the side wall of the key groove (10 a) to be detected.

5. The tool for detecting symmetry of a key slot suitable for a key slot on a rotating shaft according to claim 1, wherein: the test arm (4) is provided with a support rod (7) corresponding to the peripheral wall of the rotating shaft to be tested, one end of the support rod is connected to the test arm, and the other end of the support rod contacts and supports the peripheral wall of the reversing rotating shaft.

6. The tool for detecting symmetry of a key slot suitable for a key slot on a rotating shaft according to claim 5, wherein: the support rod (7) is arranged in a position-adjusting manner relative to the test arm (4) in the length direction.

7. The tool for detecting symmetry of a key slot suitable for a key slot on a rotating shaft according to claim 1, wherein: the testing arm (4) is of a bent rod body structure, the testing arm (4) comprises a connecting section (41) and a mounting section (42), the mounting section (42) is connected onto the pressing arm through the connecting section (41), and the measuring meter (6) is mounted on the mounting section (42).

8. The tool for detecting symmetry of a key slot suitable for a key slot on a rotating shaft according to claim 1, wherein: the measuring meter (6) is arranged on the test arm in a far-near adjusting way.