Length covering amount measuring tool

Abstract

The invention discloses a length covering amount measuring tool, which relates to the technical field of measuring tools and comprises a base and a measuring meter. The base is provided with a first fixing part and a second fixing part, one or both of which are provided with a groove for placing a to-be-tested part, and the to-be-tested part is provided with a covering part. The measuring meter head is fixedly connected with the first fixing part, the measuring rod penetrates through the first fixing part and is in sliding connection with the first fixing part, and a movable clamping block is fixedly arranged at the end, penetrating through the first fixing part, of the measuring rod. The second fixing part is provided with a fixed clamping block, and the fixed clamping block and the movable clamping block are both provided with clamping surfaces which are in contact with the two end faces of the covering part in the length direction to be measured. After a to-be-detected part is placed in the groove, the covering part is located between the clamping surfaces of the two clamping blocks. According to the invention, the groove for placing the to-be-measured part is arranged, so that the to-be-measured part does not need to be fixed by a worker in the measurement process, and the distance h between the measurement point and the outer circumference of the to-be-measured part can be within a required measurement range.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, in particular to a length covering amount measuring tool. Background Art

[0002] With the development of science and technology, the precision and accuracy of measurement technology are getting higher and higher. In many fields, such as mechanical manufacturing, aerospace, biomedicine, etc., it is necessary to accurately measure the length and coverage of objects. For details, please refer to Figure 1 , Figure 1 The axial length L1 of the cover portion 2 on the part 1 to be tested in A should be Figure 1 The axial length L2 of the matching part 3 in B is accurately covered, and the matching of the two is as follows Figure 1 C, so it is necessary to measure the axial length L1 of the covering part 2, which is the length coverage. Theoretically, the accurate measurement of the length coverage requires measuring the outermost edge of the covering part 2, that is, the measuring point should be the intersection X and Y of the two side surfaces of the covering part 2 and the outermost periphery. However, this cannot be achieved in actual operation. The only way is to take the measuring point as close to the outermost periphery as possible in the radial direction of the covering part 2, such as Figure 1 As shown in D, the smaller the distance h between the measuring point and the outermost periphery of the cover 2, the higher the measurement accuracy.

[0003] In order to achieve the above high-precision measurement, the existing measurement methods often have problems such as insufficient accuracy, complex operation, and inconvenience, and cannot meet the actual needs. Therefore, a length coverage measurement tool with simple and convenient operation and accurate accuracy is needed. Summary of the invention

[0004] The purpose of the present invention is to provide a length coverage measuring tool to solve the problems existing in the above-mentioned prior art, which can not only ensure the measurement accuracy but also simplify the measurement operation.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A length covering amount measuring tool comprises a base and a measuring table, wherein a first fixing part and a second fixing part are provided on the base, a groove for placing a part to be measured is provided on the first fixing part and / or the second fixing part, and the part to be measured has a covering part for covering a mating part; a table head of the measuring table is fixedly connected to the first fixing part, a measuring rod of the measuring table passes through the first fixing part and is slidably connected to the first fixing part, an active clamping block is fixedly provided on one end of the measuring rod passing through the first fixing part, a fixed clamping block is provided on the second fixing part, and clamping surfaces are provided on the fixed clamping block and the active clamping block, respectively used to contact the first end face and the second end face of the covering part in the length direction to be measured; 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 active clamping block and the fixed clamping block.

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

[0008] In an exemplary embodiment, the first fixing portion is provided with a first through hole for accommodating the fixing sleeve, and the fixing sleeve is fixed to the first fixing portion by a top screw.

[0009] In an exemplary embodiment, a fixing shaft is disposed on a side of the fixing block away from the clamping surface, and a second through hole for fixing the fixing shaft is formed in the second fixing portion.

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

[0011] In an exemplary embodiment, the fixing shaft is fixed to the second fixing portion by a top screw.

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

[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, a spherical probe for point contact with the first end face and / or the second end face is provided on the clamping surface of the movable clamping block and / or the fixed clamping block.

[0015] In an exemplary embodiment, a yielding cutting surface is provided on one side of the movable clamping block and the fixed clamping block close to the groove, and 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 yielding cutting surface.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] 1. A groove for placing the part to be measured is provided on the first fixing part and / or the second fixing part. When measuring, after the part to be measured is placed in the groove, 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 surface and the second end surface of the covering part, and then reading can be performed. During the reading process, there is no need for the staff 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 providing a groove for placing the part to be measured on the first fixing part and / or the second fixing part, when the size of the groove is designed for the 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, so 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 extremely difficult precision adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the size and fit relationship between the part to be tested and the mating part;

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

[0022] Figure 3 for Figure 2 Place the structural 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 the middle E part;

[0025] Figure 6 for Figure 3 Side view of

[0026] Among them, 1. the part to be measured; 2. the covering part; 3. the matching part; 4. the measuring table; 5. the base; 6. the table head; 7. the fixing sleeve; 8. the elastic part; 9. the movable clamping block; 10. the fixed clamping block; 11. the second through hole; 12. the second fixing part; 13. the groove; 14. the yield cutting surface; 15. the first fixing part; 16. the spherical probe. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. People familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present invention. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0029] It should also be noted that in the embodiments of the present application, the same figure mark is used to represent the same component or the same part.

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

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figures 2 to 6 The present embodiment provides a length covering amount measuring tool, comprising a base 5 and a measuring table 4, wherein a first fixing portion 15 and a second fixing portion 12 are provided on the base 5, a groove 13 for placing a part to be measured 1 is provided on the first fixing portion 15 and / or the second fixing portion 12, and the part to be measured 1 has a covering portion 2 for covering a matching part 3; a table head 6 of the measuring table 4 is fixedly connected to the first fixing portion 15, a measuring rod of the measuring table 4 passes through the first fixing portion 15 and is slidably connected to the first fixing portion 15, an active clamping block 9 is fixedly provided on one end of the measuring rod passing through the first fixing portion 15, a fixed clamping block 10 is provided on the second fixing portion 12, and clamping surfaces are provided on the fixed clamping block 10 and the active clamping block 9, respectively, for contacting with a first end face and a second end face of the covering portion 2 in a length direction to be measured; after the part to be measured 1 is placed in the groove 13, the covering portion 2 of the part to be measured 1 is located between the clamping surfaces of the active clamping block 9 and the fixed clamping block 10.

[0033] By providing a groove 13 for placing the part to be measured 1 on the first fixing portion 15 and / or the second fixing portion 12, after the part to be measured 1 is placed in the groove 13 during measurement, it is only necessary to adjust the position of the movable clamping block 9 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 surface and the second end surface of the covering portion 2, and then readings can be taken. During the reading process, there is no need for the staff to fix the part to be measured 1, the operation is simple and convenient, and errors caused by the instability of human operation are eliminated.

[0034] Specifically, the meter head 6 is connected to the first fixing part 15 through the fixing sleeve 7, and the measuring rod passes through the fixing sleeve 7 and the first fixing part 15 in sequence and is fixedly connected to the movable clamping block 9. The first fixing part 15 is provided with 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 top screw.

[0035] A fixed shaft is provided on one side of the fixed block 10 away from the clamping surface, and a second through hole 11 for fixing the fixed shaft is provided on the second fixing portion 12. The fixing method of the fixed shaft and the second fixing portion 12 can be to make the fixed shaft and the second through hole 11 have an interference fit, or to fix the fixed shaft to the second fixing portion 12 by a top screw.

[0036] As a preferred solution of this embodiment, an elastic member 8 is provided on the periphery of the measuring rod, and the two ends of the elastic member 8 are respectively connected to the movable block 9 and the first fixed portion 15. Under normal conditions, the movable block 9 contacts the fixed block 10 under the action of the elastic member 8. When measuring, first move the movable block 9 to the side away from the fixed block 10 and hold it, place the part 1 to be measured into the groove 13 and then release it, and the movable block 9 can automatically contact the part 1 to be measured under the action of the elastic member 8 and remain in a stable state. The elastic member 8 can be a compression spring or any other structure that can achieve the above functions.

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

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

[0039] Furthermore, a clearance cutting surface 14 is provided on the side of the movable clamping block 9 and the fixed clamping block 10 close to the groove 13, and the spherical probe 16 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 14. In order to ensure that the measuring point of the spherical probe 16 contacts the end face to be measured, and to ensure that the outer edge of the movable clamping block 9 and / or the fixed clamping block 10 does not interfere with the part to be measured 1, a part of the side of the movable clamping block 9 and / or the fixed clamping block 10 close to the groove 13 is cut off to form the clearance cutting surface 14, and the clearance cutting surface 14 passes through the center of the spherical probe 16, so that the part of the movable clamping block 9 and / or the fixed clamping block 10 closest to the cover 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 providing a groove 13 for placing the part 1 to be tested on the first fixing part 15 and / or the second fixing part 12, when designing the size of the groove 13 for the parts 1 to be tested of different sizes, the distance between the contact point or contact line between the part 1 to be tested and the groove 13 and the outer circumference of the covering part 2 can be controlled, so that after the part 1 to be tested is placed in the groove 13, the distance h between the farthest contact point between the clamping surface and the end face to be tested and the outer circumference of the part to be tested is within the required measurement range, and no further extremely difficult precision adjustment is required. Multiple experiments have shown that when the value of h is controlled within the range of 0.008mm, the error of the obtained measurement results is within the range of ±0.004mm, which fully meets the requirements of the covering amount of the design drawings.

[0041] In order 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 is required when processing each component feature of the measuring tool of this embodiment. Specifically, the straightness of the measuring rod is not greater than 0.005mm, the parallelism between the axis of the groove 13 and the axis of the first through hole for fixing the gauge head 6 is not greater than 0.005mm, to ensure that the parallelism between the axis of the groove 13 and the measuring rod of the measuring gauge 4 is not greater than 0.005mm, the flatness of the clamping surface of the movable clamp block 9 and the fixed clamp block 10 is not greater than 0.005mm, and the verticality and parallelism of the assembly combination between the various parts are not greater than 0.004mm.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

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

[0045] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0046] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0047] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0048] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A length coverage measurement tool, characterized in that: It comprises a base and a measuring table, wherein a first fixing part and a second fixing part are provided on the base, a groove for placing a part to be measured is provided on the first fixing part and / or the second fixing part, and the part to be measured has a covering part for covering a mating part; a table head of the measuring table is fixedly connected to the first fixing part, a measuring rod of the measuring table passes through the first fixing part and is slidably connected to the first fixing part, an active clamping block is fixedly provided at one end of the measuring rod passing through the first fixing part, a fixed clamping block is provided on the second fixing part, and clamping surfaces are provided on both the fixed clamping block and the active clamping block, which are respectively used to contact with a first end face and a second end face of the covering part in a length direction to be measured; 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 active clamping block and the fixed clamping 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 and is fixedly connected to the movable clamping block.

3. The length coverage measuring tool according to claim 2, characterized in that: The first fixing portion is provided with a first through hole for accommodating the fixing sleeve, and the fixing sleeve is fixed on the first fixing portion by a top screw.

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

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

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

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

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

9. The length coverage measuring tool according to any one of claims 1 to 8, characterized in that: The clamping surface of the movable clamping block and / or the fixed clamping block is provided with a spherical probe for point contact with the first end surface and / or the second end surface.

10. The length coverage measuring tool according to claim 9, characterized in that: The movable clamping block and the fixed clamping block are provided with a yielding cutting surface on one side close to the groove, and 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 yielding cutting surface.

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