A length cover measurement tool

Abstract

This invention discloses a length coverage measurement tool, relating to the field of measurement tool technology, comprising a base and a measuring dial indicator. The base has a first fixing part and a second fixing part, one or both of which have a groove for placing the part to be measured, and the part to be measured has a coverage part. The measuring dial indicator head is fixedly connected to the first fixing part, and a measuring rod passes through and is slidably connected to the first fixing part. A movable locking block is fixedly mounted on one end of the measuring rod passing through the first fixing part. The second fixing part has a fixed locking block, and both the fixed locking block and the movable locking block have clamping surfaces that contact the two end faces of the coverage part in the direction of the length to be measured. After the part to be measured is placed in the groove, the coverage part is located between the clamping surfaces of the two locking blocks. This invention, by providing a groove for placing the part to be measured, eliminates the need for personnel to fix the part to be measured during the measurement process, and also ensures that the distance h between the measuring point and the outer circumference of the part to be measured is within the required measurement range.

Description

Technical Field

[0001] This invention relates to the field of measuring tool technology, and in particular to a length coverage measuring tool. Background Technology

[0002] With the development of technology, the precision and accuracy of measurement techniques are constantly improving. Many fields, such as mechanical manufacturing, aerospace, and biomedicine, require precise measurements of the length and coverage of objects. Please refer to [link / reference needed] for details. Figure 1 , Figure 1 The axial length L1 of the cover portion 2 on the part to be tested 1 in part A must be... Figure 1 In section B, the axial length L2 of part 3 is precisely covered, and the fit between the two is as follows: Figure 1 As shown in C, it is necessary to measure the axial length L1 of the covered portion 2, which is the length of the covered portion. Theoretically, accurate measurement of the length of the covered portion requires measuring the outermost edge of the covered portion 2, i.e., the measurement point should be the intersection point X and Y of the two sides of the covered portion 2 with the outermost edge. However, this is not feasible in practice. Therefore, the measurement point can only be taken as close as possible to the outermost edge radially along the covered portion 2, such as... Figure 1 As shown in D, the smaller the distance h from the measurement point to the outermost periphery of the covered part 2, the higher the measurement accuracy.

[0003] To achieve the aforementioned high-precision measurements, existing measurement methods often suffer from insufficient accuracy, complex operation, and inconvenience, failing to meet practical needs. Therefore, a length occlusion measurement tool that is simple and convenient to operate and provides accurate results is required. Summary of the Invention

[0004] The purpose of this invention is to provide a length coverage measurement tool to solve the problems existing in the prior art, which can both ensure measurement accuracy and simplify measurement operation.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A length coverage measurement tool includes a base and a measuring dial indicator. The base has a first fixing part and a second fixing part. The first fixing part and / or the second fixing part has a groove for placing a part to be measured. The part to be measured has a covering part for covering mating parts. The dial indicator head is fixedly connected to the first fixing part. The measuring rod of the measuring dial indicator passes through the first fixing part and is slidably connected to the first fixing part. A movable locking block is fixedly provided at one end of the measuring rod passing through the first fixing part. A fixed locking block is provided on the second fixing part. Both the fixed locking block and the movable locking block have clamping surfaces for contacting the first end face and the second end face of the covering part in the direction of the length to be measured, respectively. After the part to be measured is placed in the groove, the covering part of the part to be measured is located between the clamping surfaces of the movable locking block and the fixed locking block.

[0007] In an exemplary embodiment, the meter head is connected to the first fixing part via a fixing sleeve, and the measuring rod passes through the fixing sleeve and the first fixing part in sequence before being fixedly connected to the movable locking block.

[0008] In an exemplary embodiment, the first fixing part has a first through hole for receiving the fixing sleeve, and the fixing sleeve is fixed to the first fixing part by a set screw.

[0009] In one exemplary embodiment, a fixing shaft is provided on the side of the fixing block away from the clamping surface, and the second fixing part has a second through hole for fixing the fixing shaft.

[0010] In one exemplary embodiment, the fixed shaft is interference-fitted with the second through hole.

[0011] In one exemplary embodiment, the fixed shaft is fixed to the second fixed part by a set screw.

[0012] In an exemplary embodiment, an elastic element is provided on the outer periphery of the measuring rod, and the two ends of the elastic element are respectively connected to the movable locking block and the first fixing part.

[0013] In an exemplary embodiment, the groove is disposed above or to the side of the movable block and the fixed block.

[0014] In an exemplary embodiment, the clamping surface of the movable card block and / or the fixed card block is provided with a spherical probe for point contact with the first end face and / or the second end face.

[0015] In an exemplary embodiment, the movable locking block and the fixed locking block are provided with a clearance cutting surface on the side near the groove, the spherical probe is a quarter sphere, one plane of the quarter sphere coincides with the clamping surface, and the other plane coincides with the clearance cutting surface.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] 1. By opening grooves for placing the part to be measured on the first fixing part and / or the second fixing part, after placing the part to be measured in the groove during measurement, it is only necessary to adjust the position of the movable clamping block so that the cover of the part to be measured is located between the clamping surfaces of the movable clamping block and the fixed clamping block, and the two clamping surfaces are in contact with the first end face and the second end face of the cover part, and the reading can be taken. During the reading process, no operator is required to fix the part to be measured, the operation is simple and convenient, and the error caused by the instability of human operation is eliminated.

[0018] 2. By opening grooves for placing the part to be measured on the first fixing part and / or the second fixing part, when designing the size of the grooves for parts to be measured of different sizes, the distance between the contact point or contact line between the part to be measured and the groove and the outer circumference of the covering part can be controlled. This ensures that after the part to be measured is placed in the groove, the distance h between the farthest contact point between the clamping surface and the end face to be measured and the outer circumference of the part to be measured is within the required measurement range, without the need for further highly precise adjustments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram showing the dimensions and fit between the part to be measured and the mating parts.

[0021] Figure 2 This is a schematic diagram of the structure of a length coverage measuring tool disclosed in a specific embodiment of the present invention;

[0022] Figure 3 for Figure 2 Place the structural schematic diagram of the part to be tested;

[0023] Figure 4 for Figure 3 The main view;

[0024] Figure 5 for Figure 4 Enlarged view of section E in the middle;

[0025] Figure 6 for Figure 3 Side view;

[0026] Among them, 1. part to be tested; 2. cover part; 3. mating part; 4. measuring gauge; 5. base; 6. gauge head; 7. fixed sleeve; 8. elastic element; 9. movable locking block; 10. fixed locking block; 11. second through hole; 12. second fixing part; 13. groove; 14. clearance cutting surface; 15. first fixing part; 16. spherical probe. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are merely for the convenience of describing the invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.

[0030] The purpose of this invention is to provide a length coverage measurement tool to solve the problems existing in the prior art, which can both ensure measurement accuracy and simplify measurement operation.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figures 2 to 6 This embodiment provides a length coverage measurement tool, including a base 5 and a measuring dial 4. The base 5 is provided with a first fixing part 15 and a second fixing part 12. The first fixing part 15 and / or the second fixing part 12 are provided with a groove 13 for placing the part to be measured 1. The part to be measured 1 has a covering part 2 for covering the mating part 3. The dial head 6 of the measuring dial 4 is fixedly connected to the first fixing part 15. The measuring rod of the measuring dial 4 passes through the first fixing part 15 and is slidably connected to the first fixing part 15. A movable locking block 9 is fixedly provided at one end of the measuring rod passing through the first fixing part 15. A fixed locking block 10 is provided on the second fixing part 12. Both the fixed locking block 10 and the movable locking block 9 are provided with clamping surfaces, which are respectively used to contact the first end face and the second end face of the covering part 2 in the direction of the length to be measured. After the part to be measured 1 is placed in the groove 13, the covering part 2 of the part to be measured 1 is located between the clamping surfaces of the movable locking block 9 and the fixed locking block 10.

[0033] By providing grooves 13 for placing the part to be measured 1 on the first fixing part 15 and / or the second fixing part 12, the part to be measured 1 is placed in the groove 13 during measurement. Then, the position of the movable clamping block 9 is adjusted so that the cover of the part to be measured 1 is located between the clamping surfaces of the movable clamping block 9 and the fixed clamping block 10, and the two clamping surfaces are in contact with the first end face and the second end face of the cover part 2. The reading can then be taken. During the reading process, no operator is required to fix the part to be measured 1. The operation is simple and convenient, and the error caused by the instability of human operation is eliminated.

[0034] Specifically, the meter head 6 is connected to the first fixing part 15 via the fixing sleeve 7, and the measuring rod passes through the fixing sleeve 7 and the first fixing part 15 in sequence before being fixedly connected to the movable locking block 9. The first fixing part 15 has a first through hole for accommodating the fixing sleeve 7, and the fixing sleeve 7 is fixed to the first fixing part 15 by a set screw.

[0035] A fixing shaft is provided on the side of the fixing block 10 away from the clamping surface, and the second fixing part 12 has a second through hole 11 for fixing the fixing shaft. The fixing shaft and the second fixing part 12 can be fixed by interference fit between the fixing shaft and the second through hole 11, or by fixing it to the second fixing part 12 with a set screw.

[0036] In a preferred embodiment, the outer periphery of the measuring rod is provided with an elastic element 8, and both ends of the elastic element 8 are connected to the movable locking block 9 and the first fixed part 15, respectively. Under normal conditions, the movable locking block 9 is in contact with the fixed locking block 10 under the action of the elastic element 8. During measurement, the movable locking block 9 is first moved away from the fixed locking block 10 and held in place. After placing the part to be measured 1 into the groove 13, the arm is released, and the movable locking block 9 automatically contacts the part to be measured 1 under the action of the elastic element 8 and remains in a stable state. The elastic element 8 can be a compression spring or any other structure capable of achieving the above functions.

[0037] The groove 13 is located above or to the side of the movable block 9 and the fixed block 10. In this embodiment, it is preferably located above, so that the part to be tested 1 can be in a stable state by its own weight.

[0038] As a preferred embodiment, the clamping surfaces of the movable clamping block 9 and / or the fixed clamping block 10 are provided with spherical probes 16 for point contact with the first end face and / or the second end face, so that the surface contact between the clamping surface and the end face to be measured is improved to the point contact between the spherical probe 16 and the end face to be measured, thereby further increasing the accuracy of the measurement.

[0039] Furthermore, the movable locking block 9 and the fixed locking block 10 are provided with a clearance cutting surface 14 on the side near the groove 13. The spherical probe 16 is a quarter-sphere, with one plane of the quarter-sphere coinciding with the clamping surface and the other plane coinciding with the clearance cutting surface 14. In order to ensure that the measuring point of the spherical probe 16 is in contact with the end face to be measured, and to ensure that the outer edge of the movable locking block 9 and / or the fixed locking block 10 does not interfere with the part to be measured 1, a portion of the movable locking block 9 and / or the fixed locking block 10 is cut off on the side near the groove 13 to form the clearance cutting surface 14, and the clearance cutting surface 14 passes through the center of the spherical probe 16. In this way, the part of the movable locking block 9 and / or the fixed locking block 10 closest to the covering part 2 of the part to be measured 1 is the measuring point of the spherical probe 16, ensuring that other parts will not interfere with the part to be measured 1.

[0040] By creating grooves 13 for placing the part to be measured 1 on the first fixing part 15 and / or the second fixing part 12, the distance between the contact point or contact line between the part to be measured 1 and the groove 13 and the outer circumference of the covering part 2 can be controlled when designing the dimensions of the groove 13 for different sizes of the part to be measured 1. This ensures that after the part to be measured 1 is placed in the groove 13, the distance h between the farthest contact point between the clamping surface and the end face to be measured and the outer circumference of the part to be measured is within the required measurement range, eliminating the need for further highly precise adjustments. Multiple experiments have shown that controlling the value of h within 0.008 mm results in measurement errors within ±0.004 mm, fully meeting the requirements of the covering amount in the design drawings.

[0041] To ensure that the distance h between the farthest contact point between the clamping surface and the end face to be measured and the outer circumference of the part to be measured is within the required measurement range, extremely high precision must be ensured when machining each component feature of the measuring tool in this embodiment. Specifically, the straightness of the measuring rod is no greater than 0.005 mm, the parallelism between the axis of the groove 13 and the axis of the first through hole used to fix the meter head 6 is no greater than 0.005 mm, so as to ensure that the parallelism between the axis of the groove 13 and the measuring rod of the measuring meter 4 is no greater than 0.005 mm, the flatness of the clamping surfaces of the movable clamping block 9 and the fixed clamping block 10 is no greater than 0.005 mm, and the perpendicularity and parallelism of the assembly between each part are no greater than 0.004 mm.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a fixed connection that can be detached (e.g., using bolts or screws), or a fixed connection that cannot be detached (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0044] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0045] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0046] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0047] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A length coverage measurement tool, characterized in that: The device includes a base and a measuring instrument. The base has a first fixing part and a second fixing part. The first fixing part and / or the second fixing part has a groove for placing the part to be measured. The part to be measured has a covering part for covering mating parts. The measuring instrument head is fixedly connected to the first fixing part. The measuring rod of the measuring instrument passes through the first fixing part and is slidably connected to the first fixing part. A movable locking block is fixedly provided at one end of the measuring rod passing through the first fixing part. A fixed locking block is provided on the second fixing part. Both the fixed locking block and the movable locking block are provided with clamping surfaces for contacting the first end face and the second end face of the covering part in the direction of the length to be measured, respectively. After the part to be measured is placed in the groove, the covering part of the part to be measured is located between the clamping surfaces of the movable locking block and the fixed locking block.

2. The length coverage measuring tool according to claim 1, characterized in that: The meter head is connected to the first fixing part through a fixing sleeve, and the measuring rod passes through the fixing sleeve and the first fixing part in sequence before being fixedly connected to the movable locking block.

3. The length coverage measuring tool according to claim 2, characterized in that: The first fixing part has a first through hole for accommodating the fixing sleeve, and the fixing sleeve is fixed to the first fixing part by a set screw.

4. The length coverage measuring tool according to claim 1, characterized in that: The fixing block is provided with a fixing shaft on the side away from the clamping surface, and the second fixing part is provided with a second through hole for fixing the fixing shaft.

5. The length coverage measuring tool according to claim 4, characterized in that: The fixed shaft is interference-fitted with the second through hole.

6. The length coverage measuring tool according to claim 4, characterized in that: The fixed shaft is fixed to the second fixed part by a set screw.

7. The length coverage measuring tool according to claim 1, characterized in that: An elastic element is provided on the outer periphery of the measuring rod, and the two ends of the elastic element are respectively connected to the movable locking block and the first fixing part.

8. The length coverage measuring tool according to claim 7, characterized in that: The groove is located above or to the side of the movable card block and the fixed card block.

9. The length coverage measuring tool according to any one of claims 1-8, characterized in that: The clamping surfaces of the movable card block and / or the fixed card block are provided with spherical probes for point contact with the first end face and / or the second end face.

10. The length coverage measuring tool according to claim 9, characterized in that: The movable and fixed blocks have clearance cutting surfaces on the side near the groove. The spherical probe is a quarter-sphere, with one plane of the quarter-sphere coinciding with the clamping surface and the other plane coinciding with the clearance cutting surface.

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