A measuring tool

Abstract

The utility model provides a kind of measuring tool, it is related to measuring technical field, comprising: measuring tape, scale is equipped on measuring tape;Two measuring pieces, at least one measuring piece is movably arranged on measuring tape along the arrangement direction of scale;At least one measuring piece includes main body and multiple positioning pieces, main body is axis symmetry structure, multiple positioning pieces are arranged at interval around main body periphery, each positioning piece has positioning part for being contacted with the hole wall of hole to be measured, the interval between multiple positioning parts and main body symmetry axis is equal;Positioning piece is movably arranged on main body, to move to positioning position and avoid position;When positioning piece is in positioning position, multiple positioning parts are all inserted into hole to be measured and contacted with hole wall;When positioning piece is in avoid position, multiple positioning parts are all arranged at interval with hole wall of hole to be measured.The utility model realizes the efficient, accurate measurement to hole center distance by driving swing lever to open and contact with hole to be measured, it is easy to operate, and generality is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of measurement technology, and more specifically, to a measuring tool. Background Technology

[0002] In the fields of mechanical manufacturing, assembly, and inspection, measuring the center distance of holes is a crucial step in ensuring the precision of component fit and the stability of equipment operation. Traditional measurement methods often rely on vernier calipers, micrometers, or simple mechanical measuring tools, but these tools have many limitations in practical applications. For example, vernier calipers and micrometers require calculating the center distance after measuring the dimensions of a single side, which is cumbersome and prone to introducing cumulative errors. Their low resolution makes them unsuitable for measuring complex workpieces. While mechanical measuring tools can directly measure the distance between two points, their simple structure cannot adapt to the positioning requirements of workpieces with different shapes, and errors can easily occur during measurement due to unstable clamping or positioning deviations. Furthermore, existing tools generally lack flexibility, requiring frequent replacement of parts or reliance on auxiliary fixtures, increasing operational difficulty and cost.

[0003] In practical applications, the measurement of hole center distance often involves the positioning of shafts, holes, or irregularly shaped structures. However, traditional tools struggle to balance ease of operation, measurement stability, and versatility. For example, existing tools require auxiliary fixtures for positioning, which not only increases the measurement steps but may also affect the accuracy of the results due to fixture errors. Furthermore, the structural design of some tools lacks modularity, making it impossible to quickly adapt to the measurement needs of different hole diameters or shapes, resulting in low tool utilization and high maintenance costs. Utility Model Content

[0004] The main objective of this invention is to provide a measuring tool that solves the technical problem that traditional tools in the prior art cannot simultaneously achieve ease of operation, measurement stability, and versatility.

[0005] To achieve the above objectives, according to one aspect of the present invention, a measuring tool is provided, comprising:

[0006] A measuring ruler, with graduations on it;

[0007] Two measuring elements, at least one of which is movably mounted on a measuring scale along the direction of the scale arrangement; at least one measuring element includes a main body and multiple positioning elements, the main body has an axisymmetric structure, the multiple positioning elements are spaced apart around the periphery of the main body, each positioning element has a positioning part for contacting the wall of the hole to be measured, and the multiple positioning parts are equally spaced from the axis of symmetry of the main body; the positioning elements are movably mounted on the main body to move to a positioning position and an avoidance position;

[0008] When the positioning element is in the positioning position, multiple positioning parts extend into the hole to be measured and contact the hole wall; when the positioning element is in the avoidance position, multiple positioning parts are spaced apart from the hole wall to be measured.

[0009] In some embodiments, the positioning element includes a rocker arm, the portion of which is hinged to the main body between its two ends, and one end of the rocker arm forms a positioning part. The measuring element also includes a driving element, one end of which is drivenly connected to the other end of the rocker arm, thereby moving the positioning part to a positioning position or an avoidance position by driving the other end of the rocker arm.

[0010] In some embodiments, the driving member is movably disposed along the extension direction of the body axis of symmetry, and the measuring member further includes:

[0011] Each pull rope has one end connected to the drive component and the other end connected to the other end of the swing arm. The pull ropes are spaced equally between the other end of the swing arm and the drive component, and are set one-to-one with the multiple swing arms. Each pull rope is connected to its corresponding swing arm.

[0012] In some embodiments, the pull cord is an elastic element; and / or, a plurality of levers are arranged symmetrically with respect to the axis of symmetry of the main body.

[0013] In some embodiments, the driving member is movably disposed along the extension direction of the body axis of symmetry, and the measuring member further includes:

[0014] Multiple elastic reset components are provided, with one end of each component connected to the main body and the other end connected to the swing arm. The connection points of the other end of the elastic reset component to the swing arm are located at both ends of the swing arm and are spaced apart from the hinge points. Each elastic reset component is set in a one-to-one correspondence with a swing arm, and each elastic reset component is connected to the corresponding swing arm to perform elastic reset of the swing arm, so that the swing arm is reset from the positioning position to the avoidance position.

[0015] In some embodiments, the measuring element further includes:

[0016] Multiple pull ropes, each with one end connected to a drive component and the other end connected to the other end of a swing arm. The pull ropes are spaced equally between the other end of the swing arm and the drive component, and are set one-to-one with the multiple swing arms. Each pull rope is connected to its corresponding swing arm. The pull ropes are elastic elements, and the elastic coefficient of the elastic element is less than that of the elastic reset element. And / or, the multiple swing arms are symmetrically arranged with respect to the axis of symmetry of the main body.

[0017] In some embodiments, a slide rail extending along the axis of symmetry of the main body is provided on the main body, and a drive member is at least partially movably disposed on the slide rail along the extension direction of the slide rail. An avoidance through hole extending along the extension direction of the slide rail is provided on the slide rail, and a pull rope is movably passed through the avoidance through hole along the extension direction of the avoidance through hole.

[0018] In some embodiments, the positioning members are at least two pairs, each pair of positioning members including two swing arms symmetrically arranged relative to the main body, and the at least two pairs of swing arms are arranged at a preset angle along the circumference of the main body; the driving member includes:

[0019] The first drive block extends along the spaced arrangement direction of one of the at least two pairs of positioning elements and is connected to the corresponding two rocker arms.

[0020] The second drive block extends along the spacing direction of another pair of at least two pairs of positioning elements and is connected to the corresponding two rocker arms.

[0021] The second drive block is connected to the first drive block to form a cross block. The slide rail is adapted to the shape of the cross block, and the cross block is movably set in the slide rail along the extension direction of the slide rail.

[0022] In some embodiments, the main body includes a housing that forms a protective cavity, and the housing has a through hole that penetrates the thickness of the housing wall.

[0023] When the positioning element is in the avoidance position, it is located inside the protective cavity; when the positioning element is in the positioning position, the positioning part is inserted through the through hole.

[0024] In some embodiments, the measuring element further includes:

[0025] The connector and the operating part are mounted on the housing and located outside the protective cavity. The connector has a guide channel extending along the axis of symmetry of the main body. The connector passes through a measuring scale. The guide channel is at least partially opposite to the drive member. The operating part is movably arranged along the extension direction of the guide channel to approach or move away from the drive member. And / or, the housing is a conical shell.

[0026] The measuring tool of this invention achieves efficient and accurate measurement of the center distance of holes by driving a pendulum to open and contact the hole to be measured. Its design advantages are reflected in the following aspects:

[0027] Ease of operation: The measurement process no longer relies on complex calculations or frequent adjustments, which significantly simplifies the operation process and improves measurement efficiency.

[0028] Enhanced versatility: The tool can adapt to the measurement needs of different hole types without the need to change parts, greatly improving the tool's applicability and flexibility.

[0029] Improved measurement stability: The stable contact mechanism of the pendulum effectively reduces measurement errors caused by unstable clamping or positioning deviation, ensuring the reliability of measurement results.

[0030] Cost-effectiveness: By avoiding the use of high-precision sensors or complex electronic components, manufacturing costs and subsequent maintenance expenses are reduced, making the tool more economical and practical.

[0031] Modular design: The measuring cone can be easily replaced with measuring jaws to meet the measurement needs from hole to edge, further expanding the functionality and practicality of the tool.

[0032] In summary, the measuring tool of this utility model exhibits significant advantages in terms of ease of operation, measurement accuracy, versatility, and economy. It provides a better solution for hole center distance measurement in the fields of mechanical manufacturing, assembly, and testing, significantly improving work efficiency and measurement accuracy. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0034] Figure 1 A general schematic diagram of an embodiment of a measuring tool according to the present invention is shown;

[0035] Figure 2 A schematic diagram illustrating the movement principle of a rocker arm according to an embodiment of a compressor of the present invention is shown.

[0036] Figure 3 A cross-sectional schematic diagram of an embodiment of a measuring tool according to the present invention is shown;

[0037] Figure 4 A top view of a first drive block and a second drive block according to an embodiment of a measuring tool of the present invention is shown;

[0038] Figure 5 A schematic diagram of a slide rail according to an embodiment of a measuring tool of the present invention is shown;

[0039] Figure 6 A schematic diagram of a first drive block and a second drive block according to an embodiment of a measuring tool of the present invention is shown;

[0040] Figure 7 A schematic diagram of a pendulum, slide, and pull rope according to an embodiment of a measuring tool of the present invention is shown.

[0041] The above figures include the following reference numerals:

[0042] 100. Measuring ruler;

[0043] 200. Measuring component; 210. Main body; 211. Outer shell; 212. Rotating shaft; 220. Positioning component; 221. Swing rod; 230. Driving component; 231. First driving block; 232. Second driving block; 240. Pull rope; 250. Elastic reset component; 260. Slide rail; 270. Connecting component; 280. Operating part; 281. Pushing part. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] Please refer to Figures 1-4 This utility model provides a measuring tool, including a measuring scale 100 with graduations; two measuring elements 200, at least one of which is movably disposed on the measuring scale 100 along the direction of the graduations; at least one of the measuring elements 200 includes a main body 210 and a plurality of positioning elements 220, the main body 210 having an axisymmetric structure, the plurality of positioning elements 220 being spaced apart around the periphery of the main body, each positioning element 220 having a positioning portion for contacting the wall of the hole to be measured, the plurality of positioning portions being equally spaced from the axis of symmetry of the main body 210; the positioning elements 220 are movably disposed on the main body 210 to move to a positioning position and an avoidance position; wherein, when the positioning element 220 is in the positioning position, the plurality of positioning portions extend into the hole to be measured and contact the wall of the hole to be measured; when the positioning element 220 is in the avoidance position, the plurality of positioning portions are spaced apart from the wall of the hole to be measured.

[0046] Applying the technical solution of this embodiment, the measuring tool includes a measuring scale 100 and two measuring elements 200. At least one measuring element 200 is movably disposed on the measuring scale 100 along the scale extension direction. Each measuring element 200 consists of a main body 210 and multiple positioning elements 220. The main body 210 has an axisymmetric structure, and the positioning elements 220 are spaced apart around the periphery of the main body 210. The positioning portions are equidistant from the axis of symmetry of the main body 210 and can move to a positioning position and an avoidance position. When measuring the center distance between two holes to be measured, the positioning element 220 contacts the hole wall at the positioning position, ensuring that the main body is located in the middle position between the two positioning portions, and ensuring that the axis of the main body 210 is located at the center of the hole to be measured, thus improving the accuracy and stability of the measurement. When measuring the center distance of holes of different shapes, the range of motion of the positioning element 220 can be flexibly adjusted to make the positioning portion contact the hole wall of the hole to be measured, thereby adapting to holes of different sizes and shapes. This effectively addresses the need for traditional tools to rely on auxiliary fixtures or frequently change parts to adapt to the measurement requirements of different hole diameters and shapes, significantly enhancing the versatility and adaptability of the tool. The distance between two measuring parts 200 is directly read from the scale on the measuring ruler 100, simplifying the measurement process and eliminating the need for complex calculations or multiple adjustments, thus reducing manual intervention and operational difficulty. This invention avoids reliance on high-precision sensors or complex electronic components, reducing manufacturing and maintenance costs. Simultaneously, the simple and reliable structural design ensures the long-term stability and durability of the measuring tool, improving its utilization rate. In summary, this measuring tool effectively solves the problems of cumbersome operation leading to accumulated errors, the single structure of the measuring tool making it difficult to adapt to the positioning needs of workpieces with different shapes, and the lack of flexible modular design resulting in low tool utilization and high maintenance costs in existing technologies.

[0047] Furthermore, in this embodiment, as Figure 2 As shown, the positioning component includes a rocker arm 221, with the portion of the rocker arm 221 located between its two ends hinged to the main body 210. One end of the rocker arm 221 forms a positioning part. The measuring component 200 also includes a driving component 230, one end of which is drivenly connected to the other end of the rocker arm 221, so that the positioning part can be moved to a positioning position or an avoidance position by driving the other end of the rocker arm 221. Specifically, the rocker arm 221 and the main body 210 are rotatably connected via a rotating shaft 212.

[0048] In this embodiment, the main body 210 of the measuring tool integrates a swing arm 221. Through a hinged design, the swing arm 221 can swing flexibly between a positioning position and an avoidance position. Its positioning part makes precise contact with the edge of the hole when it swings to a specific angle. With the use of the drive component 230, the movement of the swing arm 221 is not only affected by the contact force between itself and the hole, but can also be precisely controlled by one end of the drive component 230 to effectively drive the other end of the swing arm 221. This drive connection mechanism allows the measuring tool to adapt to different hole shapes and sizes. By adjusting the position of the swing arm 221, the center distance of holes such as round holes and U-shaped holes can be measured without replacing additional parts or frequent adjustments. The collaborative work of the drive component 230 and the swing arm 221 not only optimizes the measurement process and improves measurement efficiency, but also ensures positioning stability during the measurement process and reduces measurement errors caused by changes in workpiece shape, thereby significantly enhancing the versatility and measurement accuracy of the measuring tool. When the driving component 230 acts on the lever 221, causing one end to move to the positioning position, the positioning part can accurately fit the edge of the hole, achieving stable and accurate measurement. When the lever 221 moves to the avoidance position, the positioning part retracts, facilitating tool movement and rapid hole positioning. This design not only simplifies the operation process but also improves the adaptability and flexibility of the measuring tool in measuring complex workpieces.

[0049] Furthermore, in this embodiment, the driving member 230 is movably arranged along the extension direction of the axis of symmetry of the main body 210, and the measuring member 200 further includes: a plurality of pull ropes 240, one end of each pull rope 240 being connected to the driving member 230, the other end of each pull rope 240 being connected to the other end of the swing rod 221, the plurality of pull ropes 240 being spaced equally between the other end of the swing rod 221 and the driving member 230, the plurality of pull ropes 240 being arranged in a one-to-one correspondence with the plurality of swing rods 221, and each pull rope 240 being connected to the corresponding swing rod 221.

[0050] In this embodiment, the measuring tool employs an innovative combination of a drive element 230 and a swing arm 221 to achieve precise measurement of the center distance of holes. A movable drive element 230 is centrally located on the main body 210, extending along the axis of symmetry of the main body 210 and movably positioned to adapt to the measurement requirements of different holes by controlling the movement of the swing arm 221. Multiple pull ropes 240 serve as connecting media, with one end firmly connected to the drive element 230 and the other end precisely aligned with the other end of the swing arm 221. This ensures that each pull rope 240 maintains an equidistant arrangement between the drive element 230 and the swing arm 221, thereby guaranteeing the consistency and stability of the swing arm's movement and ensuring measurement accuracy. This one-to-one correspondence between the pull ropes and the swing arm allows the minute displacement of the drive element to be converted into a precise opening action of the swing arm, achieving contact with the edge of the hole and effectively avoiding the positioning deviation problem commonly found in traditional measuring tools.

[0051] By moving the drive component 230, the pull rope 240 accurately transmits mechanical force to the swing arm 221, causing it to open or return to its preset path. Overall, this technical solution greatly simplifies the measurement process of hole center distance, improves the accuracy and stability of the measurement, and also reduces manufacturing and maintenance costs. It represents a significant innovation in hole center distance measurement tools in the fields of mechanical manufacturing, assembly, and testing.

[0052] Furthermore, in this embodiment, the pull rope 240 is an elastic element; and / or, the swing arm 221 is symmetrically arranged with respect to the axis of symmetry of the main body 210.

[0053] In this embodiment, the pull cord 240 is integrated into the design as an elastic element, and its elastic properties play a crucial role in the measurement process. The pendulum rod 221 is symmetrically distributed around the axis of symmetry of the main body 210. This arrangement ensures that the axis of the main body 210 coincides with the center position of the hole to be measured when the tool measures different hole positions. The coordinated operation of the pull cord 240 and the pendulum rod 221 allows the pendulum rod 221 to open or return to its original position according to the shape of the hole, thereby achieving precise capture of the hole center. This design not only simplifies the measurement process and reduces the complexity of manual operation, but also improves the versatility and adaptability of the measurement, allowing for the measurement of center distances of shafts, holes, or irregularly shaped holes without frequent replacement of parts. The use of an elastic element avoids reliance on high-precision sensors, reducing manufacturing and maintenance costs. The symmetrically arranged pendulum rod 221 further enhances the balance during measurement, reduces errors caused by unilateral contact, and improves the accuracy and stability of the measurement. Overall, these design elements make the measuring tool not only more convenient to operate, but also highly flexible and reliable when measuring the center distances of complex holes. In other embodiments not shown in the figures, the characteristics of the elastic element or the layout of the lever can also be adjusted to accommodate a wider range of measurement needs and hole shapes.

[0054] Furthermore, in this embodiment, the driving member 230 is movably arranged along the extension direction of the axis of symmetry of the main body 210, and the measuring member further includes: a plurality of elastic reset members 250, one end of each elastic reset member 250 is connected to the main body 210, and the other end of each elastic reset member 250 is connected to the swing rod 221. The connection between the other end of the elastic reset member 250 and the swing rod 221 is located at both ends of the swing rod 221 and is spaced apart from the hinge of the swing rod 221. The plurality of elastic reset members 250 are arranged one-to-one with the plurality of swing rods 221, and each elastic reset member 250 is connected to the corresponding swing rod 221 to elastically reset the corresponding swing rod 221 so that the swing rod 221 is reset from the positioning position to the avoidance position.

[0055] In this embodiment, multiple elastic reset members 250 are respectively connected to multiple swing arms 221. This design allows the swing arms 221 to automatically reset to the avoidance position after completing the positioning task. Specifically, one end of the elastic reset member 250 is fixed to the main body 210, and the other end is connected to both ends of the swing arm 221, but maintains a certain distance from the hinge to ensure that the swing arm 221 can swing smoothly. This structural layout allows the elastic reset member 250 to effectively provide restoring force, guiding the swing arm 221 back to its original position, avoiding the inconvenience and measurement delay that may be caused by manual reset. The movable setting of the drive member 230 along the axis of symmetry of the main body 210 further enhances the operational flexibility and measurement accuracy of the measuring tool. In the actual measurement process, when the swing arm 221 contacts the target hole wall and completes positioning, the movement of the drive member 230 will trigger the elastic reset member 250, causing it to accumulate elastic potential energy. Once the measurement is complete, the drive component 230 ceases to drive one end of the swing arm 221, and the elastic reset component 250 immediately takes effect, causing the other end of the swing arm 221 to quickly reset and return to the avoidance position. This dynamic balancing mechanism not only simplifies the operation process but also ensures the continuity of the measurement process and the high-efficiency operation of the tool, thereby improving the response speed and measurement accuracy of the entire measurement system and adapting to the needs of fast-paced industrial production.

[0056] Furthermore, in this embodiment, the measuring component further includes: a plurality of pull ropes 240, one end of each pull rope 240 being connected to the driving component 230, and the other end of each pull rope 240 being connected to the other end of the swing rod 221. The distance between the plurality of pull ropes 240 and the driving component 230 at the other end of the swing rod 221 is equal. The plurality of pull ropes 240 are arranged in a one-to-one correspondence with the plurality of swing rods 221, and each pull rope 240 is connected to the corresponding swing rod 221. The pull ropes 240 are elastic elements, and the elastic coefficient of the elastic element is less than the elastic coefficient of the elastic reset element 250. And / or, the plurality of swing rods 221 are symmetrically arranged with respect to the axis of symmetry of the main body 210.

[0057] In this embodiment, the measuring tool integrates multiple pull ropes 240. One end of each pull rope 240 is connected to the drive member 230, and the other end is connected to the end of a swing arm 221. These ropes are symmetrically distributed along the main body 210 and form a one-to-one pairing with their respective swing arms 221. The pull ropes 240 are made of elastic material, and their elastic coefficient is intentionally set lower than that of the elastic reset member 250. This design ensures that the swing arm 221 can open smoothly and accurately under the drive of the drive member 230. After the drive member 230 removes the driving force on the swing arm 221, the swing arm 221 retracts, returning to its avoidance position. The multiple swing arms 221 are symmetrically arranged around the axis of symmetry of the main body 210, enabling accurate measurement of the hole center distance in both horizontal and vertical directions.

[0058] Specifically, when the driving member 230 moves under the operator's action, it applies force to the swing arm 221 through the pull rope 240, causing the swing arm 221 to rotate around the pivot 212, thereby adjusting the opening angle of the swing arm 221 to adapt to the shape and size of the hole. The presence of the elastic reset member 250 ensures that the swing arm 221 can quickly return to the avoidance position when not driven by the driving member 230, which not only simplifies the measurement process but also improves the stability during the measurement process. In this way, whether it is a round hole or a U-shaped hole, or even the distance from the hole to the edge, accurate measurement can be achieved through simple operation, greatly improving the versatility and ease of operation of the measuring tool. In other embodiments not shown in the figure, the measuring cone 3 can be replaced with measuring jaws of various shapes to adapt to more diverse measurement scenarios, further expanding the application range of this measuring tool.

[0059] Furthermore, in this embodiment, as Figure 5 As shown, a slide 260 extending along the extension direction of the axis of symmetry of the main body 210 is provided on the main body 210. At least a portion of the drive member 230 is movably disposed on the slide 260 along the extension direction of the slide 260. A clearance through hole extending along the extension direction of the slide 260 is provided on the slide 260. The pull rope 240 is movably inserted through the clearance through hole along the extension direction of the clearance through hole.

[0060] In this embodiment, the main body 210 is provided with a slide 260, which is arranged along the extension direction of the axis of symmetry of the main body 210, and is designed to provide a movement path for the drive member 230. Part of the structure of the drive member 230 can move within the slide 260 along its extension direction. This design ensures the stability and flexibility of the drive member 230 during the measurement process. The slide 260 is also specially designed with a clearance through hole for the pull rope 240 to pass through. The movement path of the pull rope 240 is consistent with the extension direction of the slide 260. By moving the pull rope 240, the position of the swing arm 221 can be precisely controlled, thereby realizing the measurement of the center distance of the hole position. The core advantage of this technical solution is that it uses the precise control of the mechanical structure to avoid the complexity and potential failure points of electronic or sensor systems, and reduces the maintenance cost and usage threshold of the measuring tool. Meanwhile, by adjusting the position of the pull rope 240 within the clearance through-hole, the measuring direction of the swing rod 221 can be easily and effectively adjusted, enhancing the versatility and adaptability of the measuring tool. This allows it to meet the measurement needs of different hole shapes and positions, significantly improving measurement efficiency and accuracy. In other embodiments not shown in the figure, the connection method between the pull rope 240 and the drive component 230, or the specific structure of the clearance through-hole, may differ, but the core principle is to ensure the accuracy and flexibility of the measurement process through mechanical linkage, further verifying the reliability and innovation of this technical solution.

[0061] Furthermore, in this embodiment, as Figure 6 and Figure 7 As shown, there are at least two pairs of positioning elements 220. Each pair of positioning elements 220 includes two swing rods 221 symmetrically arranged relative to the main body. The at least two pairs of swing rods 221 are arranged at a preset angle along the circumference of the main body 210. Preferably, the preset angle is 90 degrees. During measurement, one pair of positioning elements 220 can be selectively used according to the actual situation. Figure 4 As shown, the driving component 230 includes: a first driving block 231, which extends along the spaced arrangement direction of one of the at least two pairs of positioning members 220 and is connected to the corresponding two swing arms 221; and a second driving block 232, which extends along the spaced arrangement direction of the other pair of at least two pairs of positioning members 220 and is connected to the corresponding two swing arms 221. The second driving block 232 is connected to the first driving block 231 to form a cross block. The slide 260 is adapted to the shape of the cross block. The cross block is movably disposed in the slide 260 along the extension direction of the slide 260. In actual measurement, the first driving block 231 or the second driving block 232 can be selectively driven according to the actual situation to open the corresponding positioning members 220 for measurement.

[0062] In this embodiment, the main body 210 is equipped with multiple pairs of positioning members 220. Each pair of positioning members includes two rocker arms 221, which are symmetrically arranged relative to the main body and spaced at preset angles along the circumference of the main body 210. The driving member 230 is designed to include a first driving block 231 and a second driving block 232. The former extends along and connects to the arrangement direction of one pair of rocker arms 221, and the latter extends along and connects to the arrangement direction of another pair of rocker arms 221. At the same time, the second driving block 232 and the first driving block 231 form a cross block. This cross block is movably set within the slide 260, and its shape matches the slide. This layout allows for selective driving of either the first driving block 231 or the second driving block 232, which, through leverage, causes each pair of rocker arms 221 to open or return to their original position, thereby adapting to different hole shapes and achieving accurate measurement of circular holes, U-shaped holes, and even the distance from the hole to the edge. This technical solution not only simplifies the measurement process and improves versatility and stability, but also avoids reliance on complex electronic components through direct mechanical transmission, reducing costs and maintenance difficulty, demonstrating excellent practical value and economic benefits.

[0063] Specifically, the hole center distance measuring tool in this embodiment, through the design of the swing arm, can automatically adapt to the positioning requirements of the hole shape, and can quickly and accurately obtain the hole center distance data without the need for auxiliary fixtures or repeated adjustments. The opening and resetting mechanism of the swing arm 221 is based on the lever principle, and is realized by the movement of the first drive block 231 and the second drive block 232 within the slide rail 260, which ensures uniform contact and force control during the measurement process, thereby improving the stability and accuracy of the measurement.

[0064] Furthermore, in this embodiment, the main body 210 includes a shell 211, which forms a protective cavity. The shell 211 is provided with a through hole that penetrates the wall thickness of the shell 211. When the positioning member 220 is in the avoidance position, the positioning member 220 is disposed inside the protective cavity. When the positioning member 220 is in the positioning position, the positioning part is disposed at the through hole.

[0065] In this embodiment, the main body 210 includes a housing 211, which forms a protective cavity, and a through hole penetrating the wall thickness is provided on the housing 211. The positioning member 220 is uniquely designed so that it can be in a clearance position within the protective cavity to avoid interference; while in the positioning position, the positioning part is accurately inserted into the through hole to achieve precise positioning with the external structure. This design allows the measuring tool to remain compact and safe in the non-measuring state, preventing damage from collisions with foreign objects. When entering the measurement mode, the positioning member 220 extends rapidly to ensure stability and accuracy during the measurement process. By controlling the switching between the clearance position and the positioning position of the positioning member 220, not only can the measuring device be protected from potential damage, but reliable positioning support can also be provided in various measurement environments, greatly improving measurement efficiency and data reliability. Of course, in other embodiments not shown, the cooperation mechanism between the main body and the positioning member can adopt different structural designs, such as changing the state of the positioning member 220 through electromagnetic drive or other mechanical transmission methods to adapt to more diverse measurement needs while maintaining its core positioning accuracy and measurement stability.

[0066] Furthermore, in this embodiment, the measuring element 200 further includes a connector 270 and an operating part 280. The connector 270 is mounted on the housing 211 and located outside the protective cavity. The connector 270 has a guide channel extending along the extension direction of the axis of symmetry of the main body 210. The connector 270 passes through the measuring scale 100. The guide channel is disposed opposite to at least a portion of the drive element 230. The operating part 280 is movably disposed along the extension direction of the guide channel to approach or move away from the drive element 230.

[0067] And / or, such as Figure 3 As shown, the outer shell 211 is a conical shell. For round holes, the conical shell can directly fit against the edge of the hole, eliminating the need for the lever 221 to open, allowing for accurate center distance readings. For U-shaped holes, the lever is opened by adjusting the drive mechanism, ensuring precise contact between the two ends of the lever and the two ends of the U-shaped hole, thus obtaining accurate center distance measurements. Furthermore, the tool's flexibility lies in its ability to easily switch measurement modes. Simply adjusting the measuring cone or replacing it with measuring jaws allows for measuring the distance from the hole to the edge, demonstrating its strong adaptability to various application scenarios.

[0068] In this embodiment, the structure of the measuring element 200 is further optimized, including a connector 270 and an operating part 280. The connector 270 is mounted on the housing 211, located outside the protective cavity, and has a guide channel extending along the axis of symmetry of the main body 210. This design ensures stable guidance and positioning of the connector 270 on the measuring scale 100. The guide channel is partially opposite to the structure of the drive element 230, and the operating part 280 can move along the guide channel, allowing the user to move closer to or further away from the drive element 230 according to measurement needs. This interactive mechanism not only provides operational convenience but also enhances measurement flexibility. Specifically, the lower end of the operating part 280 is a push part 281, which can be selectively connected to either the first drive block 231 or the second drive block 232.

[0069] Meanwhile, the outer shell 211 adopts a tapered design. When the hole to be measured is a circular hole, the center distance of the hole can be measured by contacting the outer shell 211 with the hole wall. Through the reasonable layout of the connector 270 and the operating part 280, and in conjunction with the operation of the drive part 230, the measuring tool of this embodiment can adapt to the measurement needs of different hole types and hole positions to the edge. The operation process is significantly simplified, and the measurement stability and versatility are significantly enhanced. It achieves direct, reliable and high-precision center distance measurement, reduces the dependence on high-precision sensors or complex electronic components, and reduces manufacturing and maintenance costs. When it is necessary to adjust the measurement direction, the movement of the operating part 280 cooperates with the guide channel of the connector 270. By rotating the operating part 280, the pushing part 281 can selectively connect with the first drive block 231 or the second drive block 232, easily realizing the driving of different positioning parts 220, ensuring precise control of the measurement direction and the accuracy of the measurement results.

[0070] When using the measuring tool of this application to detect the center distance of holes, the operator first sets the measuring tool to the position to be measured. The scale on the measuring scale 100 serves as a reference, and the two measuring parts 200 are connected to both ends of the measuring scale 100 via the connecting parts 270. When it is necessary to measure the center distance between two circular holes, there is no need to adjust the swing arm 221; simply make the conical outer shell 211 of the measuring part 200 fit against the hole wall, and the reading at this time is the center distance between the two holes. For U-shaped holes or irregular holes, the operator controls the first driving block 231 or the second driving block 232 in the slide 260 to move through the operating part 280, causing the first driving block 231 or the second driving block 232 to move along the slide 260. The movement of the driving part 230 acts on the swing arm 221 through the pull rope 240, causing it to open to the positioning position, and the positioning part of the swing arm contacts the hole wall, completing the positioning. Subsequently, the scale on the measuring scale 100 is read to obtain the center distance of the holes. Once the measurement is complete, the force applied to the drive component 230 is removed, and the elastic reset component 250 causes the swing arm 221 to automatically retract to the avoidance position, preparing for the next measurement. If it is necessary to measure the distance from the hole to the edge, the operator can simply replace the measuring head of one of the measuring components, using measuring jaws instead of the measuring cone, achieving flexible switching of measurement modes. The entire measurement process ensures accuracy and stability through the mechanical linkage between the measuring scale, measuring component, swing arm, and drive component, eliminating the need for complex electronic components or high-precision sensors, simplifying the operation process, and improving measurement efficiency. In practical applications, this process is repeated to adapt to the measurement needs of different hole types and hole positions to the edge, demonstrating the tool's versatility and high adaptability.

[0071] The measuring tool of this invention achieves efficient and accurate measurement of the center distance of holes by driving a pendulum to open and contact the hole to be measured. Its design advantages are reflected in the following aspects:

[0072] Ease of operation: The measurement process no longer relies on complex calculations or frequent adjustments, which significantly simplifies the operation process and improves measurement efficiency.

[0073] Enhanced versatility: The tool can adapt to the measurement needs of different hole types without the need to change parts, greatly improving the tool's applicability and flexibility.

[0074] Improved measurement stability: The stable contact mechanism of the pendulum 221 effectively reduces measurement errors caused by unstable clamping or positioning deviation, ensuring the reliability of measurement results.

[0075] Cost-effectiveness: By avoiding the use of high-precision sensors or complex electronic components, manufacturing costs and subsequent maintenance expenses are reduced, making the tool more economical and practical.

[0076] Modular design: The measuring cone can be easily replaced with measuring jaws to meet the measurement needs from hole to edge, further expanding the functionality and practicality of the tool.

[0077] In summary, the measuring tool of this utility model exhibits significant advantages in terms of ease of operation, measurement accuracy, versatility, and economy. It provides a better solution for hole center distance measurement in the fields of mechanical manufacturing, assembly, and testing, significantly improving work efficiency and measurement accuracy.

[0078] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A measuring tool, characterized in that, The measuring tool is used to detect the center distance between two holes to be measured, and the measuring tool includes: A measuring ruler (100) having graduations on it; Two measuring elements (200), at least one of which is movably disposed on the measuring scale (100) along the direction of the scale arrangement; at least one of the two measuring elements (200) includes a main body (210) and a plurality of positioning elements (220), the main body (210) having an axisymmetric structure, the plurality of positioning elements (220) being spaced apart around the periphery of the main body, each positioning element (220) having a positioning portion for contacting the hole wall of the hole to be measured, the plurality of positioning portions being equally spaced from the axis of symmetry of the main body (210); the positioning elements (220) are movably disposed on the main body (210) to move to a positioning position and an avoidance position; When the positioning member (220) is in the positioning position, the plurality of positioning parts extend into the hole to be measured and contact the hole wall of the hole to be measured; when the positioning member (220) is in the avoidance position, the plurality of positioning parts are spaced apart from the hole wall of the hole to be measured.

2. The measuring tool according to claim 1, characterized in that, The positioning component includes a swing arm (221), the portion of which is hinged to the main body (210) between its two ends. One end of the swing arm (221) forms the positioning part. The measuring component (200) also includes a driving component (230), one end of which is drivenly connected to the other end of the swing arm (221) so that the positioning part can be moved to the positioning position or the avoidance position by driving the other end of the swing arm (221).

3. The measuring tool according to claim 2, characterized in that, The driving member (230) is movably disposed along the extension direction of the axis of symmetry of the main body (210), and the measuring member (200) further includes: Multiple pull ropes (240) are provided, one end of each pull rope (240) is connected to the drive member (230), and the other end of each pull rope (240) is connected to the other end of the swing rod (221). The multiple pull ropes (240) are spaced equally between the other end of the swing rod (221) and the drive member (230). The multiple pull ropes (240) are arranged in a one-to-one correspondence with the multiple swing rods (221), and each pull rope (240) is connected to the corresponding swing rod (221).

4. The measuring tool according to claim 3, characterized in that, The pull rope (240) is an elastic element; and / or, The swing arm (221) is symmetrically arranged with respect to the axis of symmetry of the main body (210).

5. The measuring tool according to claim 2, characterized in that, The driving member (230) is movably disposed along the extension direction of the axis of symmetry of the body (210), and the measuring member further includes: Multiple elastic reset members (250) are provided. One end of each elastic reset member (250) is connected to the main body (210), and the other end of each elastic reset member (250) is connected to the swing arm (221). The connection between the other end of the elastic reset member (250) and the swing arm (221) is located at both ends of the swing arm (221) and spaced apart from the hinge of the swing arm (221). The multiple elastic reset members (250) are provided in a one-to-one correspondence with the multiple swing arms (221). Each elastic reset member (250) is connected to the corresponding swing arm (221) to elastically reset the corresponding swing arm (221) so that the swing arm (221) is reset from the positioning position to the avoidance position.

6. The measuring tool according to claim 5, characterized in that, The measuring element (200) also includes: Multiple pull ropes (240) are provided, one end of each pull rope (240) being connected to the drive member (230), and the other end of each pull rope (240) being connected to the other end of the swing rod (221). The multiple pull ropes (240) are spaced equally between the other end of the swing rod (221) and the drive member (230). The multiple pull ropes (240) are arranged in a one-to-one correspondence with the multiple swing rods (221), and each pull rope (240) is connected to its corresponding swing rod (221). The pull ropes (240) are elastic elements, and the elastic coefficient of the elastic element is less than the elastic coefficient of the elastic reset element (250). And / or, The plurality of said rocker arms (221) are arranged symmetrically with respect to the axis of symmetry of said body (210).

7. The measuring tool according to claim 3 or 6, characterized in that, The main body (210) is provided with a slide rail (260) extending along the extension direction of the axis of symmetry of the main body (210). At least a portion of the drive member (230) is movably disposed on the slide rail (260) along the extension direction of the slide rail (260). The slide rail (260) is provided with a clearance through hole extending along the extension direction of the slide rail (260). The pull rope (240) is movably disposed through the clearance through hole along the extension direction of the clearance through hole.

8. The measuring tool according to claim 7, characterized in that, The positioning elements (220) are in at least two pairs, each pair of positioning elements (220) including two swing rods (221) symmetrically arranged relative to the main body, and the at least two pairs of swing rods (221) are arranged at a preset angle along the circumferential interval of the main body (210); the driving element (230) includes: The first drive block (231) extends along the spaced arrangement direction of one of the at least two pairs of positioning members (220) and is connected to the corresponding two swing arms (221); The second drive block (232) extends along the spacing direction of another pair of at least two pairs of positioning members (220) and is connected to the corresponding two swing arms (221); The second drive block (232) is connected to the first drive block (231) to form a cross block. The slide (260) is adapted to the shape of the cross block. The cross block is movably disposed in the slide (260) along the extension direction of the slide (260).

9. The measuring tool according to claim 2, characterized in that, The main body (210) includes an outer shell (211), the outer shell (211) forming a protective cavity, and the outer shell (211) is provided with a through hole that extends through the wall thickness of the outer shell (211); When the positioning element (220) is in the avoidance position, the positioning element (220) is disposed inside the protective cavity; when the positioning element (220) is in the positioning position, the positioning part passes through the through hole.

10. The measuring tool according to claim 9, characterized in that, The measuring element (200) also includes: A connector (270) and an operating part (280), the connector (270) being mounted on the housing (211) and located outside the protective cavity, the connector (270) having a guide channel extending along the extension direction of the axis of symmetry of the body (210), the connector (270) passing through the measuring scale (100), the guide channel being disposed opposite to at least a portion of the drive member (230), and the operating part (280) being movably disposed along the extension direction of the guide channel to approach or move away from the drive member (230); and / or, The outer shell (211) is a conical shell.

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