Center hole detection tool convenient for replacing detection head

Abstract

The utility model discloses a center hole detection tool convenient for replacing a detection head, relates to the technical field of center hole detection, and is mainly used for solving the problem that the conventional center hole detection tool is a special-purpose detection tool with detection heads in one-to-one correspondence with center holes and is difficult to meet the increasingly diversified detection requirements of the center holes. One end of the cylinder is connected with a dial indicator, the other end of the cylinder is detachably and coaxially connected with a mandrel guide column, a mandrel is coaxially inserted in the mandrel guide column, one end of the mandrel is in contact with the end of a detection rod of the dial indicator, the other end of the mandrel is connected with a detection head, and a spring is arranged between the detection head and the end face of the mandrel guide column. And a core shaft anti-drop sleeve is detachably mounted on the core shaft positioned in the barrel body. The utility model provides the center hole detection tool with the detection head convenient to replace, and the detection head can be conveniently and rapidly replaced according to the specification and the type of the center hole, so that the increasingly diversified detection requirements of the center hole can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to center hole detection technical field especially, it relates to a center hole gauge convenient to replace detection head. BACKGROUND

[0002] At present, the center hole is often used as the process reference in the machining process of camshaft, is used for the clamping, inspection and assembly positioning reference of workpiece, thereby ensuring the position stability of workpiece in the machining process. Therefore, the quality of center hole will directly affect the machining quality of workpiece, and in order to monitor the quality and stability of center hole, the center hole gauge is often used to measure and evaluate the machining quality, thereby ensuring the production and processing stability of subsequent process.

[0003] With the acceleration of industry market competition, product iteration speed upgrades, the specification and type of center hole are becoming more and more diversified. But the existing center hole gauge is still the special gauge that detection head corresponds to center hole one by one, and its manufacturing cycle is long and the type of center hole that can be detected is single, so it is difficult to meet the detection demand of the increasingly diversified center hole. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a center hole gauge convenient to replace detection head, which can replace detection head conveniently and quickly according to the specification and type of center hole, thereby meeting the detection demand of the increasingly diversified center hole.

[0005] The utility model solves the technical scheme of the above technical problem: a center hole gauge convenient to replace detection head, including the cylinder, one end of the cylinder is detachably coaxially connected with the dial gauge, and the detection rod of the dial gauge extends to the inside of the cylinder, the other end of the cylinder is detachably coaxially connected with the mandrel guide column, and the mandrel guide column is coaxially inserted with the mandrel that can move axially, one end of the mandrel is in contact with the end part of the detection rod of the dial gauge, the other end extends to the outside of the end face of the mandrel guide column and is connected with the detection head, the spring that is in contact with the detection head and the end face of the mandrel guide column is arranged between the detection head and the end face of the mandrel guide column, and the mandrel anti-disengagement sleeve is detachably installed on the mandrel in the cylinder.

[0006] As a further improvement of the utility model, the dial gauge is detachably installed on the end face of the cylinder through the dial holder.

[0007] As a further improvement of the utility model, the dial holder is annular and is sleeved with the outside of the detection rod of the dial gauge, the dial holder is provided with the section surface that is in communication with the inner ring side and the outer ring side of the dial holder along the radial direction, the clamping bolt that penetrates the section surface is screw-mounted on the dial holder, and the dial holder is installed on the end face of the cylinder through the fixed bolt that penetrates the dial holder and is screw-connected with the end face of the cylinder.

[0008] As a further improvement of the present application, the inner ring of the dial clamp is provided with a copper sleeve which is sleeved on the outside of the detection rod of the dial gauge.

[0009] As a further improvement of the present application, the core shaft guide column is inserted on the end face of the cylinder, and the core shaft guide column is directly threadedly connected with the cylinder.

[0010] As a further improvement of the present application, the core shaft and the detection head are in an integrated structure.

[0011] As a further improvement of the present application, the end face of the core shaft guide column close to the detection head is provided with a retreat groove for the detection head, and the spring is sleeved on the outside of the core shaft and abuts against the bottom face of the retreat groove and the detection head at two ends.

[0012] As a further improvement of the present application, the core shaft anti-dropping sleeve is sleeved on the outside of the core shaft, and the core shaft locking bolt which penetrates the core shaft anti-dropping sleeve along the radial direction and abuts against the top of the core shaft is threadedly installed on the core shaft anti-dropping sleeve.

[0013] Advantages

[0014] Compared with the prior art, the center hole gauge with the detection head convenient to replace of the present application has the following advantages:

[0015] 1. The center hole gauge can replace the detection head matched with the center hole in a convenient and fast way by means of disassembling the core shaft guide column and the core shaft anti-dropping sleeve, extracting and replacing the core shaft according to the size and type of the center hole to be detected, thereby improving the application range of the center hole gauge and meeting the detection requirements of the increasingly diversified center holes.

[0016] The present application will become more apparent with the following description and accompanying drawings, which are used to explain the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0018] Fig. 1 The present application is a structural schematic view.

[0019] Fig. 2 This is an axial half-sectional view of the watch holder;

[0020] Fig. 3 This is a radial sectional view of the mandrel anti-dislodgement sleeve.

[0021] Wherein: 1-Dial indicator; 2-Copper sleeve; 3-Indicator clamp; 4-Cylinder body; 5-Mandrel anti-disengagement sleeve; 6-Mandrel; 7-Mandrel guide post; 8-Spring; 9-Allowing groove; 10-Detection head. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] 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; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] Example:

[0026] The specific embodiments of this utility model are as follows: Figs. 1-3 As shown, a center hole gauge for easy head replacement includes a cylindrical body 4. A dial indicator 1 is detachably coaxially connected to one end of the cylindrical body 4, and the probe of the dial indicator 1 extends axially into the cylindrical body 4. Simultaneously, a mandrel guide post 7 is detachably coaxially connected to the other end of the cylindrical body 4, and a mandrel 6 capable of axial movement is coaxially inserted into the mandrel guide post 7. One end of the mandrel 6 contacts the end of the probe of the dial indicator 1, and the other end extends beyond the end face of the mandrel guide post 7 and is connected to a test head 10 corresponding to the specifications and type of the center hole. A spring 8 is provided between the test head 10 and the end face of the mandrel guide post 7, with its two ends respectively abutting against both. In this embodiment, the mandrel 6 can be pulled out from the mandrel guide post 7; therefore, to prevent the mandrel 6 from accidentally falling off, a mandrel anti-dislodgement sleeve 5 is detachably installed on the mandrel 6 located inside the cylindrical body 4.

[0027] When the center hole gauge is used to detect the center hole, the detection head 10 is first inserted into the center hole of the standard part and tightly attached to each other, and then the force moving towards the center hole is continuously applied along the axial direction of the gauge until the end face of the mandrel guide column 7 is flush with the outer end face plane of the center hole of the standard block. In this process, the spring 8 is compressed under force. And after the end face of the mandrel guide column 7 is flush with the outer end face plane of the center hole of the standard block, the reading of the dial gauge 1 is cleared.

[0028] Then, the detection head 10 is inserted into the center hole of the measured part until the end face of the mandrel guide column 7 is flush with the outer end face plane of the center hole of the standard block. At this time, the change range of the pointer of the dial gauge 1 is observed, and if the change range exceeds the predetermined value, it means that the center hole parameters of the measured part and the center hole parameters of the standard part are quite different, and the measured part is unqualified. On the contrary, if the change range of the dial gauge 1 pointer is within the preset value, the measured part is qualified.

[0029] When facing different specifications and types of center holes, the mandrel guide column 7 is first removed from the barrel 4, then the mandrel anti-loosening sleeve 5 is removed from the mandrel 6, and the mandrel 6 is pulled out of the mandrel guide column 7. Then, according to the specifications and types of the center hole, the mandrel 6 with the corresponding detection head 10 is selected, and the center hole gauge is reassembled in the reverse order of the previous disassembly steps, that is, the replacement of the detection head 10 is completed.

[0030] Compared with the existing center hole gauge, the center hole gauge can replace the detection head 10 matched with the center hole in a convenient and fast way by removing the mandrel guide column 7, the mandrel anti-loosening sleeve 5, and replacing the mandrel 6 according to the specifications and types of the center hole to be detected, thereby improving the application range of the center hole gauge, and further meeting the detection needs of the increasingly diversified center holes. At the same time, the wide application range of the center hole gauge also means that when facing different specifications and types of center holes, there is no need to re-produce the center hole gauge corresponding to the center hole, thereby avoiding the inconvenience caused by the long production cycle of the center hole gauge, and further improving the efficiency.

[0031] In the center hole gauge, the dial gauge 1 is detachably installed on the end face of the barrel 4 through the table clamp 3. Specifically, the table clamp 3 is annular and sleeves the outer side of the detection rod of the dial gauge 1. Among them, the table clamp 3 is provided with a section surface that communicates the inner ring side and the outer ring side of the table clamp 3 along the radial direction, and the table clamp 3 is provided with a clamping bolt penetrating the section surface and being screwed. By the clamping bolt, the table clamp 3 can be tightened to prevent the dial gauge 1 from falling off. At the same time, the table clamp 3 is installed on the end face of the barrel 4 through the fixing bolt penetrating the table clamp 3 and being screwed with the end face of the barrel 4. In this embodiment, the inner ring side of the table clamp 3 is provided with a copper sleeve 2 sleeved on the outer side of the detection rod of the dial gauge 1.

[0032] In order to realize the detachable connection of the mandrel guide column 7 and the cylinder 4, the mandrel guide column 7 is inserted on the end face of the cylinder 4, and the mandrel guide column 7 is directly threadedly connected with the cylinder 4, and the disassembly and assembly between the two are very convenient. Moreover, in order to reduce the number of parts, the mandrel 6 and the detection head 10 of the center hole gauge are integrated.

[0033] In addition, the end face of the mandrel guide column 7 close to the detection head 10 is provided with a retreat groove 9 for the retreat of the detection head 10. The spring 8 is sleeved outside the mandrel 6, and the two ends of the spring 8 respectively abut against the detection head 10 and the bottom face of the retreat groove 9.

[0034] In the embodiment, the mandrel anti-falling sleeve 5 is sleeved outside the mandrel 6. In order to realize the detachable connection of the mandrel anti-falling sleeve 5 and the mandrel 6, the mandrel anti-falling sleeve 5 is threadedly provided with a mandrel locking bolt which penetrates the mandrel anti-falling sleeve 5 along the radial direction and abuts against the top of the mandrel 6. Through the abutting contact of the mandrel locking bolt and the top of the mandrel 6, the mandrel anti-falling sleeve 5 can be effectively prevented from falling off and displacement from the mandrel 6, and the disassembly and assembly are very convenient.

[0035] The utility model has been described above in combination with the best embodiment, but the utility model is not limited to the above disclosed embodiments, and should cover various modifications, equivalent combinations according to the essence of the utility model.

Claims

1. A center hole gauge facilitating replacement of a detection head, comprising a barrel (4), characterized in that, One end of the barrel (4) is detachably coaxially connected with a dial gauge (1), and the detection rod of the dial gauge (1) extends into the barrel (4), the other end of the barrel (4) is detachably coaxially connected with a mandrel guide column (7), and the mandrel guide column (7) is coaxially inserted with a mandrel (6) which can move axially, one end of the mandrel (6) is in contact with the end of the detection rod of the dial gauge (1), the other end extends out of the end face of the mandrel guide column (7) and is connected with a detection head (10), the detection head (10) and the end face of the mandrel guide column (7) are provided with springs (8) which are in contact with both of them at both ends, the mandrel (6) in the barrel (4) is detachably installed with a mandrel anti-loosing sleeve (5).

2. The center hole gage of claim 1, wherein, The dial gauge (1) is detachably installed on the end face of the barrel (4) through a gauge clamp (3).

3. The center hole gage of claim 2, wherein, The gauge clamp (3) is annular and sleeved on the outside of the detection rod of the dial gauge (1), the gauge clamp (3) is provided with a cross section which communicates the inner ring side and the outer ring side of the gauge clamp (3) along the radial direction, and the gauge clamp (3) is threadedly installed with a clamping bolt which penetrates the cross section, the gauge clamp (3) is installed on the end face of the barrel (4) through a fixing bolt which penetrates the gauge clamp (3) and is threadedly connected with the end face of the barrel (4).

4. The center hole gage of claim 3, wherein, The inner ring side of the gauge clamp (3) is provided with a copper sleeve (2) which is sleeved on the outside of the detection rod of the dial gauge (1).

5. The center hole gage of claim 1, wherein, The mandrel guide column (7) is inserted into the end face of the barrel (4), and the mandrel guide column (7) is directly threadedly connected with the barrel (4).

6. The center hole gage of claim 1, wherein, The mandrel (6) and the detection head (10) are of an integral structure.

7. The center hole gage of claim 1, wherein, The end face of the mandrel guide column (7) near the detection head (10) is provided with a relief groove (9) for the detection head (10) to retreat into, and the spring (8) is sleeved on the outside of the mandrel (6), and the both ends of the spring (8) are in contact with the detection head (10) and the bottom face of the relief groove (9) respectively.

8. The center hole gage of claim 1, wherein The mandrel anti-loosing sleeve (5) is sleeved on the outside of the mandrel (6), and the mandrel anti-loosing sleeve (5) is threadedly installed with a mandrel locking bolt which penetrates the mandrel anti-loosing sleeve (5) along the radial direction and is in contact with the top of the mandrel (6).

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