Detection tool for measuring length of inner groove

Abstract

The utility model discloses a gauge for measuring the length of an inner groove. The gauge comprises a dial indicator. The measuring assembly comprises a rotatable measuring rod which is connected with the dial indicator, a detecting block is arranged on the circumferential wall of the measuring rod, and the detecting block can be driven to be screwed into the inner groove of the workpiece to be measured by rotating the measuring rod; the thickness of the detection block is gradually reduced along the direction in which the detection block is screwed into the inner groove, so that an inclined abutting surface is formed on the top surface or the bottom surface of the detection block; the detection block is gradually screwed into the inner groove of the to-be-detected workpiece to enable the abutting surface to abut against the side wall of the inner groove so as to drive the measuring rod to slide in the axial direction of the to-be-detected workpiece. According to the utility model, through the inclined arrangement of the abutting surface, the height position of the side wall of the inner groove is converted into the movement of the measuring rod along the height direction, then the movement is transmitted to the dial indicator, and the length of the inner groove can be measured by reading the numerical value of the dial indicator, so that the original scheme of measuring through a vernier caliper is replaced; the problems that a caliper cannot extend into a workpiece to be measured due to the small aperture of the workpiece to be measured and the measurement error of the caliper is large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring workpieces, in particular to a measuring tool for measuring the length of an inner groove. Background Art

[0002] For some workpieces, during manufacturing, it is necessary to drill a hole and open a ring groove in the hole. After production, it is necessary to measure the distance from the inner groove to the end face of the workpiece, that is, the length of the inner groove needs to be measured, in order to select qualified workpieces.

[0003] The existing measurement method is to use a vernier caliper to measure, with the main scale inserted into the hole and abutting against the side wall of the inner groove, and the secondary scale abutting against the end face of the workpiece to obtain the distance from the side wall of the inner groove to the end face of the workpiece. However, this measurement method has the following defects: first, when the hole diameter of the workpiece is small, the caliper cannot be inserted into the hole and abut against the inner groove wall, so the measurement cannot be achieved; second, even if the caliper can be inserted into the hole, the caliper is easy to deviate from the axial direction of the hole, and the caliper is tilted, resulting in the measured length being greater than the actual inner groove length, resulting in a large error. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to propose a gauge for measuring the inner groove length, which is used to solve the problems in the prior art that the caliper cannot be inserted into the hole to measure the inner groove length and there are measurement errors.

[0005] The utility model solves the technical problem by adopting a technical solution which is a gauge for measuring the length of an inner groove, comprising a micrometer and also comprising:

[0006] The measuring assembly comprises: a rotatable measuring rod connected to the micrometer, a detection block being arranged on the peripheral wall of the measuring rod, and the measuring rod being rotated to drive the detection block to be screwed into the inner groove of the workpiece to be measured; the thickness of the detection block gradually decreases along the direction in which it is screwed into the inner groove, so as to form an inclined abutment surface on the top surface or bottom surface of the detection block; the detection block is gradually screwed into the inner groove of the workpiece to be measured so that the abutment surface abuts against the side wall of the inner groove, so as to drive the measuring rod to slide along the axial direction of the workpiece to be measured.

[0007] Furthermore, the abutting surface is located on the bottom surface of the detection block, and the abutting surface gradually tilts upward along the direction in which the abutting surface is screwed into the inner groove.

[0008] Furthermore, the measuring assembly further comprises a fixing sleeve, a side wall of the fixing sleeve is provided with a notch, and a height of the notch is greater than a maximum thickness of the detection block;

[0009] The measuring rod is eccentrically arranged in the fixing sleeve, and the measuring rod rotates relative to the fixing sleeve to drive the detection block to rotate into or out of the notch.

[0010] Furthermore, a positioning block is provided at one end of the fixing sleeve, and the positioning block has a positioning surface that can fit with the end surface of the workpiece to be measured.

[0011] Furthermore, a rubber column is provided at one end of the fixing sleeve away from the positioning block.

[0012] Furthermore, a preload spring is provided between the fixing sleeve and the measuring rod.

[0013] Furthermore, a toggle rod is fixedly connected to the measuring rod.

[0014] Furthermore, it also includes a linkage component, which includes a linkage rod, and the linkage rod has a rotating part, a first connecting part and a second connecting part. The rotating part is located between the first connecting part and the second connecting part. The linkage rod can rotate around the rotating part, the first connecting part can be connected to the measuring rod, and the second connecting part can be connected to the micrometer.

[0015] Furthermore, the micrometer includes a dial and a telescopic rod connected to the dial, and the second connecting portion can abut against the telescopic rod.

[0016] Furthermore, it also includes a box body, the linkage assembly is arranged in the box body, and the detection block and the dial are both located at the upper end of the box body.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects:

[0018] By setting the abutment surface inclined, the height position of the inner groove side wall is converted into the movement of the measuring rod along the height direction, and then the movement is transmitted to the micrometer. The value of the micrometer can be read to measure the length of the inner groove, thereby replacing the original solution of measuring with a vernier caliper, solving the problem that the caliper cannot be inserted due to the small aperture of the workpiece to be measured and the large measurement error of the caliper. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the inspection tool in the embodiment;

[0020] Figure 2 It is a schematic diagram of the structure of the measuring component, the linkage component and the micrometer in the embodiment;

[0021] Figure 3 It is a structural schematic diagram of the fixing sleeve in the embodiment;

[0022] Figure 4 It is a structural schematic diagram of the detection block in the embodiment;

[0023] In the figure:

[0024] 100, box body;

[0025] 200, measuring assembly; 210, measuring rod; 220, detection block; 221, abutment surface; 230, fixing sleeve; 231, notch; 232, eccentric hole; 240, rubber column; 250, toggle rod; 260, positioning block;

[0026] 300, micrometer; 310, dial; 320, telescopic rod;

[0027] 400. Linkage rod. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] Please refer to Figure 1-Figure 4 The utility model discloses a gauge for measuring the length of an inner groove, comprising a micrometer 300 and:

[0030] The measuring assembly 200 comprises: a rotatable measuring rod 210, which is connected to the micrometer 300; a detection block 220 is provided on the peripheral wall of the measuring rod 210; rotating the measuring rod 210 can drive the detection block 220 to be screwed into the inner groove of the workpiece to be measured; the thickness of the detection block 220 gradually decreases along the direction in which it is screwed into the inner groove, so as to form an inclined abutment surface 221 on the top surface or bottom surface of the detection block 220; the detection block 220 is gradually screwed into the inner groove of the workpiece to be measured so that the abutment surface 221 abuts against the side wall of the inner groove, so as to drive the measuring rod 210 to slide along the axial direction of the workpiece to be measured.

[0031] The present application provides a rotatable measuring rod 210, and a detection block 220 is provided on the measuring rod 210, and the detection block 220 has an inclined abutment surface 221. Specifically, the measuring rod 210 is extended into the hole of the workpiece to be measured and the measuring rod 210 is rotated, which can drive the detection block 220 to rotate and make the abutment surface 221 abut against the side wall of the inner groove; due to the inclination of the abutment surface 221, the end of the detection block 220 with a smaller thickness first enters the inner groove and makes the abutment surface 221 abut against the side wall of the inner groove. With the continuous rotation of the measuring rod 210, the positions at different heights on the abutment surface 221 can abut against the side wall of the inner groove, so that the detection block 220 can drive the measuring rod 210 to move a short distance in the height direction, and the distance in the height direction is transmitted by the measuring rod 210 to the micrometer 300 connected thereto, and converted into the reading of the micrometer 300, and finally the distance from the inner groove to the end face of the workpiece is measured, that is, the length of the inner groove.

[0032] It can be seen that the present application converts the height position of the inner groove side wall into the movement of the measuring rod 210 along the height direction through the inclined setting of the abutment surface 221, and then transmits the movement to the micrometer 300. The value of the micrometer 300 can be read to measure the length of the inner groove, thereby replacing the original solution of measuring with a vernier caliper, solving the problem that the caliper cannot be inserted due to the small aperture of the workpiece to be measured, and the large measurement error of the caliper.

[0033] Furthermore, the abutting surface 221 is located at the bottom surface of the detection block 220 , and the abutting surface 221 gradually tilts upward along the direction in which the abutting surface 221 is screwed into the inner groove.

[0034] The abutting surface 221 is located at the bottom surface of the detection block 220 , and the abutting surface 221 abuts against a side wall of the inner groove with a lower height. As the measuring rod 210 rotates, the detection block 220 drives the measuring rod 210 to move upward, and finally transmits it to the micrometer 300 .

[0035] Furthermore, the measuring assembly 200 further includes a fixing sleeve 230, a side wall of the fixing sleeve 230 is provided with a notch 231, and a height of the notch 231 is greater than a maximum thickness of the detection block 220;

[0036] The measuring rod 210 is eccentrically disposed in the fixing sleeve 230 , and the measuring rod 210 rotates relative to the fixing sleeve 230 to drive the detection block 220 to rotate into or out of the notch 231 .

[0037] Specifically, the fixing sleeve 230 can be provided to constrain the measuring rod 210. An eccentric hole 232 is provided in the fixing sleeve 230, and the measuring rod 210 is placed in the eccentric hole 232, so that the measuring rod 210 can rotate and slide in the eccentric hole 232. At the same time, a notch 231 is provided in the side wall of the fixing sleeve 230, and the notch 231 is a 90° arc groove. By rotating the measuring rod 210, the detection block 220 can be driven to rotate into the notch 231 and abut against the side wall of the inner wall of the workpiece to be measured.

[0038] Furthermore, a positioning block 260 is provided at one end of the fixing sleeve 230 , and the positioning block 260 has a positioning surface that can fit with the end surface of the workpiece to be measured.

[0039] Specifically, the positioning block 260 is provided to position the end face of the workpiece to be measured, which can prevent the workpiece to be measured from tilting and can also lock the position of the workpiece to be measured. When the workpiece to be measured is placed on the positioning block 260, the height of the detection block 220 can be roughly equal to the height of the inner groove of the workpiece to be measured, so that the detection block 220 can be screwed into the inner groove and abut against the side wall of the inner groove.

[0040] Furthermore, a rubber column 240 is further disposed at one end of the fixing sleeve 230 away from the positioning block 260 .

[0041] Specifically, the rubber column 240 is provided to prevent the top of the fixing sleeve 230 from hitting the bottom of the hole of the workpiece to be measured, thereby protecting the workpiece to be measured and the fixing sleeve 230 .

[0042] Furthermore, a preload spring is provided between the fixing sleeve 230 and the measuring rod 210 .

[0043] A preload spring is provided to provide a preload force for the measuring rod 210 to move downward, so that the abutment surface 221 always abuts against the side wall of the inner groove during the measurement process, and can be reset downward to the initial height after the measurement.

[0044] Furthermore, a toggle rod 250 is fixedly connected to the measuring rod 210 .

[0045] A toggle rod 250 is provided, and after the test is completed, force can be applied to the toggle rod 250 to drive the measuring rod 210 to rotate to the initial position, so that the detection block 220 returns to the notch 231 to facilitate the next measurement.

[0046] Furthermore, it also includes a linkage component, which includes a linkage rod 400, and the linkage rod 400 has a rotating part, a first connecting part and a second connecting part. The rotating part is located between the first connecting part and the second connecting part. The linkage rod 400 can rotate around the rotating part, the first connecting part can be connected to the measuring rod 210, and the second connecting part can be connected to the micrometer 300.

[0047] Furthermore, the dial gauge 300 includes a dial 310 and a telescopic rod 320 connected to the dial 310 , and the second connecting portion can abut against the telescopic rod 320 .

[0048] Furthermore, it also includes a box body 100 , the linkage assembly is arranged in the box body 100 , and the detection block 220 and the dial 310 are both located at the upper end of the box body 100 .

[0049] Specifically, when the measuring rod 210 is rotated, the detection block 220 is driven to slide relative to the side wall of the inner groove, and the detection block 220 slides upward together with the measuring rod 210. At this time, the linkage rod 400 rotates instantaneously under the action of the elastic force or torsion spring of the micrometer 300 (a spring is provided between the telescopic rod 320 and the dial 310, or a torsion spring is provided on the rotating part), maintaining the abutment between the first connecting part and the measuring rod 210, and then the telescopic rod 320 on the micrometer 300 slides downward and maintains the abutment with the second connecting part, thereby converting the downward movement of the detection rod into the upward movement of the telescopic rod 320, and then the detection block 220 and the dial 310 can be set at the same height (that is, at the upper end of the box 100) to facilitate measurement and reading.

[0050] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A gauge for measuring the length of an inner groove, comprising a micrometer, characterized in that: Also includes: The measuring assembly comprises: a rotatable measuring rod connected to the micrometer, a detection block being arranged on the peripheral wall of the measuring rod, and the measuring rod being rotated to drive the detection block to be screwed into the inner groove of the workpiece to be measured; the thickness of the detection block gradually decreases along the direction in which it is screwed into the inner groove, so as to form an inclined abutment surface on the top surface or bottom surface of the detection block; the detection block is gradually screwed into the inner groove of the workpiece to be measured so that the abutment surface abuts against the side wall of the inner groove, so as to drive the measuring rod to slide along the axial direction of the workpiece to be measured.

2. A gauge for measuring the length of an inner groove according to claim 1, characterized in that: The abutting surface is located on the bottom surface of the detection block, and the abutting surface gradually tilts upward along the direction in which the abutting surface is screwed into the inner groove.

3. A gauge for measuring the length of an inner groove according to claim 1, characterized in that: The measuring assembly further comprises a fixing sleeve, a side wall of which is provided with a notch, and a height of the notch is greater than a maximum thickness of the detection block; The measuring rod is eccentrically arranged in the fixing sleeve, and the measuring rod rotates relative to the fixing sleeve to drive the detection block to rotate into or out of the notch.

4. A gauge for measuring the length of an inner groove according to claim 3, characterized in that: A positioning block is also arranged at one end of the fixing sleeve, and the positioning block has a positioning surface which can be fitted with the end surface of the workpiece to be measured.

5. A gauge for measuring the length of an inner groove according to claim 4, characterized in that: A rubber column is also provided at one end of the fixing sleeve away from the positioning block.

6. A gauge for measuring the length of an inner groove according to claim 3, characterized in that: A preload spring is provided between the fixing sleeve and the measuring rod.

7. A gauge for measuring the length of an inner groove according to claim 1, characterized in that: The measuring rod is also fixedly connected with a toggle rod.

8. A gauge for measuring the length of an inner groove according to claim 1, characterized in that: It also includes a linkage assembly, which includes a linkage rod. The linkage rod has a rotating part, a first connecting part and a second connecting part. The rotating part is located between the first connecting part and the second connecting part. The linkage rod can rotate around the rotating part. The first connecting part can be connected to the measuring rod, and the second connecting part can be connected to the micrometer.

9. A gauge for measuring the length of an inner groove according to claim 8, characterized in that: The micrometer includes a dial and a telescopic rod connected to the dial, and the second connecting portion can abut against the telescopic rod.

10. A gauge for measuring the length of an inner groove according to claim 9, characterized in that: It also includes a box body, the linkage assembly is arranged in the box body, and the detection block and the dial are both located at the upper end of the box body.

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