Electronic plug gauge

Abstract

The utility model relates to an electronic plug gauge in the technical field of aperture measurement, which comprises a handle, a sensor is arranged in an inner cavity of the handle, and a detection head which is coaxial with the handle and is correspondingly connected with the sensor is arranged at the lower end of the handle. The elastic body is coaxially arranged in the inner cavity of the guide sleeve, the upper section of the elastic body is a hollow shaft section which extends out and is fixedly connected with the guide sleeve, and the hollow shaft section extends into the inner cavity of the handle and is in threaded fit with the handle; the lower section of the elastic body is a deformation section, the deformation section is provided with two spaced and parallel deformation bodies, the lower sections of the inner side walls of the two deformation bodies are both provided with step surfaces which are obliquely arranged, and the middle positions of the lower end parts of the outer side surfaces of the two deformation bodies are both vertically provided with measuring rods; according to the utility model, the problem that the traditional smooth plug gauge does not have data display, storage and analysis functions is solved; and meanwhile, the detection head can be quickly disassembled and assembled, that is, the detection operation on the sizes of different apertures can be completed in a mode of replacing the detection head.

Description

Technical Field

[0001] The utility model relates to the technical field of aperture measurement, in particular to an electronic plug gauge. Background Technique

[0002] During the production process of parts, in order to ensure the processing quality of the aperture, the aperture is usually detected.

[0003] The traditional method for detecting the aperture usually uses a smooth plug gauge, which has a go end and a no-go end machined at both ends of a metal rod. When using it, if the go end of the plug gauge can be inserted into the hole and the no-go end cannot be inserted into the hole, it indicates that the aperture size of the workpiece is qualified. However, this detection method belongs to rigid detection and can only be guaranteed by mechanical processing accuracy, without data display and analysis.

[0004] Currently, an electronic plug gauge is often used for detection. The mechanical displacement is converted into an electric quantity through an inductance sensor, and the measured aperture is displayed digitally. The electronic plug gauge mainly consists of a handle, a detection head, etc. When using the electronic plug gauge, hold the handle and insert the detection head into the hole to be detected, and then the aperture can be detected. However, the detection head of the existing electronic plug gauge is usually an integral structure. When it is necessary to detect apertures of different specifications, the detection head cannot be replaced, resulting in low applicability of the electronic plug gauge.

[0005] Therefore, we have designed an electronic plug gauge capable of replacing the detection head. Summary of the Utility Model

[0006] In order to overcome the deficiencies in the background technique, the utility model discloses an electronic plug gauge.

[0007] To achieve the above-mentioned invention purpose, the utility model adopts the following technical scheme:

[0008] An electronic plug gauge includes a handle. A sensor is arranged in the inner cavity of the handle, and a detection head coaxial with the handle and correspondingly connected to the sensor is arranged at the lower end. The detection head includes:

[0009] A guide sleeve, and a through hole radially penetrating is arranged at the lower end part thereof;

[0010] An elastic body is coaxially arranged in the inner cavity of the guide sleeve. The upper section of the elastic body is a hollow shaft section that extends out and is fixedly connected to the guide sleeve. The hollow shaft section extends into the inner cavity of the handle and is in threaded cooperation with the handle. The lower section of the elastic body is a deformation section, and the deformation section has two spaced and parallel deformable bodies. The lower inner side walls of the two deformable bodies both have inclined step surfaces. At the middle position of the lower end parts of the outer sides of the two deformable bodies, measuring rods are vertically arranged, and the outer ends of the measuring rods coaxially penetrate the corresponding through holes;

[0011] The core rod has a conical end at its lower end, and the lower end of the core rod is coaxially and slidably inserted into the elastic body and is in contact and cooperation with the step surface; the upper end surface of the core rod is in contact and cooperation with the detection end of the sensor.

[0012] Wherein, an arc-shaped notch is provided at the upper end of the outer side of the deformable body to facilitate the inward deformation of the deformable body.

[0013] Preferably, an expanded neck portion with a top surface fitting the inner top surface of the guide sleeve is provided on the shaft body at the lower end of the hollow shaft section, and a locking nut with a bottom surface pressed against the top surface of the guide sleeve is provided on the shaft body at the upper end of the hollow shaft section.

[0014] Preferably, a core rod sliding sleeve that is matched with the rod body of the core rod is provided at the upper end of the inner cavity of the hollow shaft section.

[0015] Preferably, a limit sleeve with a bottom surface in contact and cooperation with the top surface of the elastic body is fixedly sleeved on the rod body of the core rod.

[0016] Preferably, it further includes a clamping sleeve provided in the inner cavity of the handle. The lower end of the clamping sleeve body is in threaded cooperation with the lower end of the inner cavity of the handle, and the inner cavity of the clamping sleeve is in threaded cooperation with the upper end of the shaft body of the hollow shaft section; the sensor is correspondingly provided in the upper section of the inner cavity of the clamping sleeve.

[0017] Preferably, a bushing for fixing the sensor is provided at the upper end of the inner cavity of the clamping sleeve.

[0018] Preferably, an expanded neck portion is provided at the lower end of the guide sleeve, and a sealing cover is provided on the expanded neck portion.

[0019] Preferably, a measuring tip is provided at the outer end of the measuring rod.

[0020] Preferably, a cable fixing head is provided at the upper end of the handle.

[0021] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0022] 1. The electronic plug gauge solves the problems that the traditional smooth plug gauge does not have data display, storage and analysis; at the same time, the detection head can be quickly disassembled and assembled, that is, the detection operation of different hole diameters can be completed by replacing the detection head. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the utility model;

[0024] Figure 2 is a cross-sectional view of the utility model;

[0025] Figure 3 is a cross-sectional view of the detection head in the utility model;

[0026] Figure 4 is a structural schematic diagram of the elastic body in the utility model.

[0027] In the figure: 1. Handle; 2. Sensor; 3. Guide sleeve; 4. Elastomer; 401. Hollow shaft section; 4011. Necking section; 402. Deformation section; 4021. Deformation body; 4022. Step surface; 4023. Arc notch; 5. Measuring rod; 6. Core rod; 7. Locking nut; 8. Core rod sliding sleeve; 9. Stroke limiting sleeve; 10. Clamping sleeve; 11. Bushing; 12. Sealing cover; 13. Probe. Specific embodiments

[0028] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, it is only corresponding to the drawings of the present application for the convenience of describing the present utility model; it should be understood that if there are terms such as "end", "side", "end part", "side part", "transverse", "longitudinal", etc. indicating the orientation or positional relationship, it is only corresponding to the length and width of the corresponding component, that is, the "end part" indicates the head and tail regions in the length direction of the corresponding component, and the "side part" indicates the head and tail regions in the width direction of the corresponding component; it is for the convenience of describing the present utility model rather than indicating or implying that the device or element referred to must have a specific orientation.

[0029] Combined with the attached Figures 1-4 , an electronic plug gauge, comprising a handle 1. A sensor 2 is arranged in the inner cavity of the handle 1, and a detection head coaxial with the lower end of the handle 1 and correspondingly connected to the sensor 2 is provided. According to needs, a cable fixing head 14 is provided at the upper end of the handle 1 for fixing the cable of the sensor 2.

[0030] The detection head includes:

[0031] A guide sleeve 3, and a through hole radially penetrating through the lower end portion thereof is provided; that is to say, the side wall of the guide sleeve 3 has two coaxial holes, and the two holes are regarded as a through hole as a whole.

[0032] An elastomer 4 is coaxially arranged in the inner cavity of the guide sleeve 3. The upper section of the elastomer 4 is a hollow shaft section 401 that extends out and is fixedly connected to the guide sleeve 3, and the hollow shaft section 401 extends into the inner cavity of the handle 1 and is in threaded cooperation with the handle 1; the lower section of the elastomer 4 is a deformation section 402, and the deformation section 402 has two spaced and parallel deformation bodies 4021. The lower inner side walls of the two deformation bodies 4021 are both provided with inclined step surfaces 4022. Measuring rods 5 are perpendicularly provided at the middle positions of the lower outer side surfaces of the two deformation bodies 4021, and the outer ends of the measuring rods 5 coaxially penetrate through the corresponding through holes;

[0033] Specifically, arc notches 4023 are provided at the upper end portions of the outer side surfaces of the deformation bodies 4021.

[0034] That is, due to the presence of the arc-shaped notch 4023, when the deformable body 4021 is subjected to inward pressure, the deformable body 4021 can be deformed inward. According to needs, the deformable body 4021 is made of elastic steel material.

[0035] As required, in order to install the elastic body 4 , the lower end of the guide sleeve 3 is provided with an expanded neck 4011 , and the expanded neck 4011 is provided with a sealing cover 12 .

[0036] The lower end of the core rod 6 is a conical end, the lower end of the core rod 6 is coaxially slidably inserted into the elastic body 4, and abuts against the step surface 4022; the upper end surface of the core rod 6 abuts against the detection end of the sensor 2; as needed, the outer end of the measuring rod 5 is provided with a measuring element 13. That is, the outer end of the measuring rod 5 is a spherical end.

[0037] When in use, hold the handle 1 and insert the detection head into the hole along the axis of the hole to be measured. It should be noted that before use, the sensor 2 in the electronic plug gauge needs to be connected to the corresponding main body for use.

[0038] It should be noted that the cable corresponding to sensor 2 is not shown in the figure.

[0039] In a possible embodiment, in combination with the attached Figures 2-3 The lower end of the hollow shaft section 401 is provided with an expanded neck 4011 whose top surface is in contact with the inner top surface of the guide sleeve 3, and the upper end of the hollow shaft section 401 is provided with a locking nut 7 whose bottom surface is pressed against the top surface of the guide sleeve 3; specifically, the upper end of the inner cavity of the guide sleeve 3 is provided with a reduced diameter portion, the top surface of the expanded neck 4011 is in contact with the bottom surface of the reduced diameter portion of the guide sleeve 3, and the bottom surface of the locking nut 7 is in contact with the top surface of the reduced diameter portion of the guide sleeve 3. This arrangement can realize the function of locking or loosening the elastic body 4 by rotating the locking nut 7.

[0040] In a possible embodiment, in combination with the attached Figures 2-3 The upper end of the inner cavity of the hollow shaft section 401 is provided with a core rod sliding sleeve 8 that is matched with the rod body of the core rod 6; according to needs, the connection between the core rod sliding sleeve 8 and the hollow shaft section 401 can be fixed by a top screw, or by interference fit, gluing, etc.; this can ensure that the core rod 6 will not have radial deviation, thereby improving the detection accuracy.

[0041] In a possible embodiment, in combination with the attached Figures 2-3 The rod body fixing sleeve of the core rod 6 is provided with a limit sleeve 9 whose bottom surface contacts with the top surface of the elastic body 4. Specifically, when the bottom surface of the limit sleeve 9 contacts with the top surface of the elastic body 4, the lower end of the core rod 6 contacts with the step surface 4022. In other words, the setting of the limit sleeve 9 can prevent the core rod 6 from falling too much, causing the deformable body 4021 to be stretched open.

[0042] In a possible embodiment, in combination with the attached Figure 2, further comprising a clamping sleeve 10 disposed in the inner cavity of the handle 1. The lower end of the body of the clamping sleeve 10 is in threaded fit with the lower end of the inner cavity of the handle 1, and the inner cavity of the clamping sleeve 10 is in threaded fit with the upper end of the shaft body of the hollow shaft section 401. The sensor 2 is correspondingly disposed in the upper section of the inner cavity of the clamping sleeve 10. As required, the hollow shaft section 401 can also be directly in threaded fit with the handle 1.

[0043] When there is a lock nut 7, the position where the hollow shaft section 401 is in threaded fit with the clamping sleeve 10 is above the position where the hollow shaft section 401 is in threaded fit with the lock nut 7; at this time, the lower end of the inner cavity of the clamping sleeve 10 can be provided with a reamed hole structure for accommodating the lock nut 7.

[0044] In a possible embodiment, in combination with the attached Figure 2 , a bushing 11 for fixing the sensor 2 is provided at the upper end of the inner cavity of the clamping sleeve 10; as required, the bushing 11 can be fixed to the upper end of the inner cavity of the clamping sleeve 10 by a set screw. By pressing the bushing 11 with the set screw, the bushing 11 is deformed, thereby tightly holding the outer shell of the sensor 2, so that the bushing 11, the sensor 2 and the clamping sleeve 10 are fixed together.

[0045] It should be noted that: except for the guide sleeve 3, the measuring rod 5 and the measuring tip 13 in this electronic plug gauge, the rest of the parts are all general products. That is to say, when measuring holes with different apertures, only the guide sleeve 3, the measuring rod 5 and the measuring tip 13 are different, and the structural dimensions of the rest of the parts are exactly the same; therefore, when replacing, the whole detection head can be replaced, or only the guide sleeve 3, the measuring rod 5 and the measuring tip 13 can be replaced.

[0046] When disassembling the detection head, only need to loosen the connecting thread between the handle 1 and the clamping sleeve 10, and then loosen the connecting thread between the clamping sleeve 10 and the elastic body 4, then the detection head can be disassembled.

[0047] The parts not detailed in the present invention are the prior art. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, aiming to include all changes falling within the meaning and scope of the equivalent elements within the present invention.

Claims

1. An electronic plug gauge, comprising a handle (1), wherein a sensor (2) is provided in the inner cavity of the handle (1), and a detection head is provided at the lower end thereof, which is coaxial with the sensor (2) and correspondingly connected to the sensor (2), characterized in that: The detection head comprises: A guide sleeve (3) having a radially penetrating through hole provided at its lower end; The elastic body (4) is coaxially arranged in the inner cavity of the guide sleeve (3); the upper section of the elastic body (4) is a hollow shaft section (401) extending out and fixedly connected to the guide sleeve (3); the hollow shaft section (401) extends into the inner cavity of the handle (1) and is threadedly matched with the handle (1); the lower section of the elastic body (4) is a deformation section (402); the deformation section (402) has two deformation bodies (4021) spaced apart and parallel to each other; the lower sections of the inner side walls of the two deformation bodies (4021) both have inclined step surfaces (4022); the middle positions of the lower ends of the outer side surfaces of the two deformation bodies (4021) are vertically provided with measuring rods (5); and the outer ends of the measuring rods (5) coaxially penetrate the corresponding through holes; The core rod (6) has a conical lower end, the lower end of the core rod (6) is coaxially slidably inserted into the elastic body (4) and abuts against the step surface (4022); the upper end surface of the core rod (6) abuts against the detection end of the sensor (2); Wherein, an arc-shaped notch (4023) is provided at the upper end of the outer surface of the deformable body (4021) to facilitate the inward deformation of the deformable body (4021).

2. An electronic plug gauge according to claim 1, characterized in that: The shaft body at the lower end of the hollow shaft section (401) is provided with an expanded neck (4011) whose top surface is in contact with the inner top surface of the guide sleeve (3), and the shaft body at the upper end of the hollow shaft section (401) is provided with a locking nut (7) whose bottom surface is pressed against the top surface of the guide sleeve (3).

3. The electronic plug gauge according to claim 1, characterized in that: The upper end portion of the inner cavity of the hollow shaft section (401) is provided with a core rod sliding sleeve (8) which is matched and sleeved on the shaft of the core rod (6).

4. The electronic plug gauge according to claim 1, characterized in that: The core rod (6) shaft fixing sleeve is provided with a travel limiting sleeve (9) whose bottom surface contacts and cooperates with the top surface of the elastic body (4).

5. The electronic plug gauge according to claim 1, characterized in that: It also includes a clamping sleeve (10) disposed in the inner cavity of the handle (1), wherein the lower end of the clamping sleeve (10) is threadedly engaged with the lower end of the inner cavity of the handle (1), and the inner cavity of the clamping sleeve (10) is threadedly engaged with the upper end of the shaft body of the hollow shaft section (401); the sensor (2) is correspondingly disposed in the upper section of the inner cavity of the clamping sleeve (10).

6. An electronic plug gauge according to claim 5, characterized in that: A bushing (11) for fixing the sensor (2) is provided at the upper end of the inner cavity of the clamping sleeve (10).

7. The electronic plug gauge according to claim 1, characterized in that: The lower end of the guide sleeve (3) is provided with an expanded neck portion (4011), and the expanded neck portion (4011) is provided with a sealing cover (12).

8. The electronic plug gauge according to claim 1, characterized in that: The outer end of the measuring rod (5) is provided with a measuring element (13).

9. The electronic plug gauge according to claim 1, characterized in that: The upper end of the handle (1) is provided with a cable fixing head (14).

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