Measuring device

Abstract

The invention discloses a measuring device which comprises a supporting assembly and a measuring assembly, the supporting assembly comprises a bottom plate and a positioning piece arranged on the bottom plate, and one end of the positioning piece abuts against the inner wall of a to-be-measured element so that the to-be-measured element can be horizontally positioned; the measuring assembly is slidably connected with the supporting assembly. The measuring assembly comprises a plurality of measuring heads which abut against the inner wall of the to-be-measured element so as to measure the inner diameter of the to-be-measured element. According to the application, the to-be-measured element is horizontally positioned through the positioning piece, so that the measuring device is kept stable and the measuring points are consistent in the horizontal direction during measurement, the problem of inaccurate positioning of the to-be-measured element (such as a casing) caused by heating expansion is avoided, the center of the to-be-measured element is aligned with the reference of the measuring device, and accurate measurement is realized. Meanwhile, the positioning piece is matched with the multiple measuring heads, so that the accuracy of measured data is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measurement, in particular to a measuring device. BACKGROUND

[0002] With the rapid development of new energy vehicles, the power electric drive as the power core of new energy vehicles has also made rapid progress, and the requirements for the cleanliness and efficiency of the motor are also gradually increasing. Due to the different structural shapes of the motor, different shell expansion amounts are caused, so a convenient and accurate measuring tool is needed, but the measuring tool in the related art has problems such as inaccurate measurement data. SUMMARY

[0003] Therefore, the present application provides a measuring device to solve the problem of inaccurate measurement data in the prior art.

[0004] In order to solve the above technical problems, the technical scheme provided by the present application is to provide a measuring device, which comprises a supporting assembly and a measuring assembly, the supporting assembly comprises a bottom plate and a positioning piece arranged on the bottom plate, one end of the positioning piece abuts against the inner wall of a to-be-measured element to horizontally position the to-be-measured element; the measuring assembly is in sliding connection with the supporting assembly; the measuring assembly comprises a plurality of measuring heads, and the plurality of measuring heads respectively abut against the inner wall of the to-be-measured element to measure the inner diameter of the to-be-measured element.

[0005] In an embodiment, the number of positioning pieces is multiple, and adjacent two positioning pieces are arranged at intervals.

[0006] In an embodiment, the number of positioning pieces is at least three, and the three positioning pieces are arranged at equal intervals along the circumference of the to-be-measured element.

[0007] In an embodiment, the side wall outer surface of the positioning piece is an arc surface, and the arc surface abuts against the inner wall of the to-be-measured element.

[0008] In an embodiment, the supporting assembly further comprises: a first driving piece and a sliding block arranged on the top surface of the first driving piece, the first driving piece drives the sliding block to move from the center of the top surface to the periphery along the radial direction of the to-be-measured element; the positioning pieces are arranged one by one corresponding to the sliding blocks, and the sliding blocks drive the positioning pieces to move synchronously.

[0009] In an embodiment, the supporting assembly further comprises: a sliding rail arranged on the top surface of the first driving piece and arranged in radial misalignment with the sliding block; The connecting piece has a body portion and a step portion extending toward one side of the slide rail; the body portion has a first groove and a second groove extending further toward the step portion along a part of the bottom wall of the first groove, the first groove is connected with the first driving member; the positioning member is embedded in the second groove; the step portion has a third groove, and one end of the slide rail away from the measuring assembly is embedded in the third groove.

[0010] In an embodiment, the measuring assembly further comprises: The mounting seat has a first through hole, and the slide rail penetrates through the first through hole; The sliding sleeve is arranged on the mounting seat; the sliding sleeve is sleeved on the slide rail and is configured to slide along the axial direction of the slide rail to drive the mounting seat and the plurality of measuring heads to move up and down.

[0011] In an embodiment, the measuring assembly further comprises: Each measuring member has the measuring head at one end; the other end of the measuring member is connected with the side wall of the sliding sleeve; the plurality of measuring members are arranged at equal intervals on the mounting seat.

[0012] In an embodiment, the measuring assembly further comprises: The clamping portion is arranged on the side of the measuring member away from the sliding sleeve to fix the measuring head.

[0013] In an embodiment, the measuring member is a dial gauge or a micrometer.

[0014] In an embodiment, the measuring device further comprises: The clamping mechanism includes a clamping portion and a second driving member; the clamping portion is used to clamp the measuring assembly; the support assembly further includes a slide rail, and the second driving member is configured to drive the clamping portion and the measuring assembly to slide along the axial direction of the slide rail.

[0015] In an embodiment, the second driving member is further configured to drive the clamping portion and the measuring assembly to rotate radially relative to the slide rail.

[0016] In an embodiment, the measuring head is a flexible structural member.

[0017] The beneficial effects of this application are as follows: Unlike existing technologies, the measuring device of this application includes a support assembly and a measuring assembly. The support assembly includes a base plate and a positioning element disposed on the base plate. One end of the positioning element abuts against the inner wall of the component to be measured to horizontally position the component. The measuring assembly is slidably connected to the support assembly. The measuring assembly includes multiple measuring heads, each abutting against the inner wall of the component to be measured to measure its inner diameter. This application uses the positioning element to horizontally position the component to be measured, thereby ensuring that the measuring device remains stable and the measuring points are consistent in the horizontal direction during measurement. This avoids the problem of inaccurate positioning of the component to be measured (e.g., a housing) due to thermal expansion, aligning the center of the component to be measured with the reference of the measuring device for accurate measurement. Furthermore, the positioning element, in conjunction with multiple measuring heads, results in higher accuracy of the measured data. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a measuring device provided in an embodiment of this application; Figure 2 This is a schematic diagram showing the disassembled structure of the measuring device and the element under test provided in an embodiment of this application; Figure 3 This is a three-dimensional structural diagram of the measuring device provided in an embodiment of this application, showing its usage state. Figure 4 This is a top view of the measuring device in use according to an embodiment of this application; Figure 5 yes Figure 4 The provided enlarged structural diagram of part A; Figure 6 This is a partial structural schematic diagram of a support component provided in an embodiment of this application; it shows the structure of the base plate, positioning member, first driving member, and slider; Figure 7 This is a three-dimensional structural schematic diagram of the connector of the support component provided in an embodiment of this application from one perspective; Figure 8 This is a three-dimensional structural schematic diagram of the connector of the support component provided in one embodiment of this application from another perspective; Figure 9 This is a schematic diagram of the disassembled structure of a measurement component provided in an embodiment of this application; Figure 10This is a schematic diagram of the overall structure of a measuring component provided in another embodiment of this application; the structure of the clamping part is omitted.

[0020] Explanation of reference numerals in the attached figures: 100. Measuring device; 10. Support assembly; 11. Base plate; 12. Positioning component; 121. First sidewall; 122. Arc surface; 13. First driving component; 131. Top surface; 14. Slider; 15. Slide rail; 16. Connecting component; 161. Body part; 1611. First groove; 1612. Second groove; 162. Step part; 1621. Third groove; 20. Measuring assembly; 21. Mounting base; 211. First through hole; 22. Sliding sleeve; 221. Second sidewall; 222. Second through hole; 23. Measuring component; 231. Measuring head; 24. Mounting sleeve; 241. Third through hole; 25. Clamping part; 26. Clamping mechanism; 261. Clamping part; 30. Component to be measured; 31. Inner wall; 32. Positioning circle. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The terms "first" and "second" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications will change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] During the research process of this application, it was found that with the rapid development of new energy vehicles, the electric drive system, as the core power source of new energy vehicles, has also made rapid progress, and the requirements for the cleanliness and efficiency of the motor's internal components are gradually increasing. Due to different power requirements, diameters, external reinforcing ribs, and external functional holes, motors have different structural shapes, resulting in different housing expansion amounts. Therefore, a convenient and accurate measuring tool is needed. However, existing measuring tools suffer from inaccurate measurement data. Taking the motor housing (hereinafter referred to as "housing") as an example, existing measuring devices have the following drawbacks: 1. When using an internal diameter three-jaw measuring ruler for measurement, if the ruler is not positioned correctly during measurement, it will cause the internal diameter three-jaw measuring ruler to be skewed, which will affect the measurement results. That is, the measuring ruler will not measure a complete circle of the machine casing. 2. The existing three-jaw measuring device has three measuring points. This measuring device can expand to more measuring points, and the measuring dial can be rotated in the circumferential direction to obtain the data of the entire circle of the casing. There are more measuring points and the measurement data is more accurate. 3. When measuring the diameter with the existing three-jaw measuring ruler, after it is placed inside the machine housing, the measuring caliper needs to be rotated to extend the measuring head to obtain the data. However, the measuring device of this application can be placed inside the machine housing and the readings of the dial indicator or micrometer can be directly viewed and recorded to confirm the amount of deformation after the machine housing is heated. 4. The existing three-jaw measuring ruler has a relatively hard and sharp edge, which can easily scratch the inner wall of the casing. The dial indicator in this application has a flexible material at the contact point with the inner wall of the casing, which will not scratch the inner wall of the casing.

[0025] To address the aforementioned problems, this application provides a novel measuring device.

[0026] Please see Figures 1 to 10 , Figure 1 This is a schematic diagram of the overall structure of a measuring device provided in an embodiment of this application; Figure 2 This is a schematic diagram showing the disassembled structure of the measuring device and the element under test provided in an embodiment of this application; Figure 3 This is a three-dimensional structural diagram of the measuring device provided in an embodiment of this application, showing its usage state. Figure 4 This is a top view of the measuring device in use according to an embodiment of this application; Figure 5 yes Figure 4The provided enlarged structural diagram of part A; Figure 6 This is a partial structural schematic diagram of a support component provided in an embodiment of this application; it shows the structure of the base plate, positioning member, first driving member, and slider; Figure 7 This is a three-dimensional structural schematic diagram of the connector of the support component provided in an embodiment of this application from one perspective; Figure 8 This is a three-dimensional structural schematic diagram of the connector of the support component provided in one embodiment of this application from another perspective; Figure 9 This is a schematic diagram of the disassembled structure of a measurement component provided in an embodiment of this application; Figure 10 This is a schematic diagram of the overall structure of a measuring component provided in another embodiment of this application; the structure of the clamping part is omitted.

[0027] like Figures 1 to 6 As shown, the measuring device 100 of this application includes a support assembly 10 and a measuring assembly 20. The support assembly 10 includes a base plate 11 and a positioning member 12 disposed on the base plate 11. One end of the positioning member 12 abuts against the inner wall 31 of the component under test 30 to perform horizontal or center positioning of the component under test 30. The positioning member 12 can be a three-jaw positioning expansion sleeve. After the three-jaw positioning expansion sleeve expands, it abuts against the inner wall 31 of the component under test 30 to center the component under test 30, which facilitates the positioning of the component under test 30. This avoids the inner wall 31 of the component under test 30 (e.g., a housing) from becoming an irregular circle due to thermal expansion, which would lead to inaccurate positioning. Centering can be understood as center positioning or horizontal positioning, so that multiple measuring points of the component under test 30 are on the same horizontal plane, thereby improving measurement accuracy. The component under test 30 can be a cylindrical component such as a housing.

[0028] The measuring component 20 is slidably connected to the support component 10, for example, the measuring component 20 can slide up and down along the support component 10. The measuring component 20 includes multiple measuring heads 231, which abut against the inner wall 31 of the element to be measured 30 to measure the inner diameter of the element to be measured 30. When measuring the inner diameter of the element to be measured 30, since its inner diameter changes at different temperatures, the measurement of the inner diameter of the element to be measured 30 can be understood as its inner diameter data in the current state, thereby obtaining the deformation of the element to be measured 30 at different temperatures.

[0029] Furthermore, the measuring head 231 can be a flexible structural component, for example, made of an elastic material, allowing it to directly contact the inner wall 31 of the component under test 30. During operation, as the measuring assembly 20 slides along the base plate 11, the flexible measuring head 231 elastically deforms according to the irregular shape of the inner wall 31 of the component under test 30, ensuring uniform and continuous contact with the inner wall 31 and avoiding localized stress concentration or gaps caused by rigid contact. Specifically, silicone, rubber, or plastic materials can be used as the main body of the measuring head 231; alternatively, the measuring head 231 can be designed as a hemispherical structure to optimize the fit between the measuring head 231 and the inner wall 31 of the component under test 30.

[0030] The measuring head 231 is a flexible structure, which allows it to adapt to the irregular shape of the inner wall 31 of the component under test 30, thereby achieving more accurate measurement data. The flexible structure helps to protect the inner wall 31 from scratches. The flexible structure further improves the contact stability during the measurement process, thereby enhancing the reliability of the data.

[0031] In other embodiments, the inner wall 31 of the element under test 30 can also be provided with a cylindrical positioning circle 32. Multiple measuring heads 231 can be abutted against the inner surface or top of the positioning circle 32 to achieve horizontal positioning of the element under test 30 and improve measurement accuracy.

[0032] In one embodiment, the base plate 11 serves as a supporting foundation and can be used to fix the positioning member 12. The positioning member 12 has a three-claw structure, with one end directly abutting against the inner wall 31 of the component under test 30. By expanding or contracting, it achieves contact with the positioning circle 32 inside the component under test 30 (e.g., the housing), thereby eliminating the positioning misalignment caused by the irregularity of the inner wall 31 after the component under test 30 is heated. The measuring assembly 20 is connected to the base plate 11 via a sliding connection. The measuring assembly 20 can include multiple measuring elements 23, for example, five, which would have five measuring heads 231.

[0033] In one embodiment, the measuring head 231 can be a dial indicator structure, with each dial indicator contacting the inner wall 31 of the component under test 30. After the positioning member 12 abuts against the inner wall 31, the measuring component 20 slides along the support component 10, allowing multiple measuring heads 231 to simultaneously contact different positions on the inner wall 31 of the component under test 30, enabling direct reading of the dial indicator's fluctuation data without rotation. Specifically, a spring-loaded three-jaw expansion sleeve structure can be used, made of stainless steel; alternatively, the measuring head 231 can be replaced with a digital dial indicator, transmitting data via a wireless network. In other embodiments, the sliding connection can be replaced with a ball screw structure to improve accuracy. The three-jaw positioning structure of the positioning member 12 is designed to adapt to the irregular shape of the inner positioning circle 32 of the component under test 30 after heating, avoiding measurement deviations caused by the three-point positioning of traditional measuring rulers; the parallel arrangement of multiple measuring heads 231 increases the contact points from three to five, improving data reliability; the dial indicator contact method replaces the sharp edge of traditional measuring rulers, reducing the risk of scratching the inner wall 31 of the component under test 30.

[0034] This application uses the positioning element 12 to horizontally position the component under test 30, thereby ensuring the stability of the measuring device 100 and the consistency of the measuring points in the horizontal direction during measurement. This avoids the problem of inaccurate positioning of the component under test 30 (e.g., housing) due to thermal expansion, and aligns the center of the component under test 30 with the reference of the measuring device 100, achieving accurate measurement. The contact between the positioning element 12 and the inner wall 31 of the component under test 30 makes the horizontal positioning more stable; at the same time, the positioning element 12, in conjunction with multiple measuring heads 231, makes the measurement data more accurate by having multiple measuring heads 231 contact the inner wall 31 respectively; the use of a dial indicator to replace the sharp edge of the traditional measuring ruler helps protect the inner wall 31 of the component under test 30 from scratches; and the sliding connection of the measuring component 20 allows for direct reading of fluctuation data, making the measurement process more convenient.

[0035] For ease of description, the following description uses the component under test 30 as the housing.

[0036] In one embodiment, there are multiple positioning elements 12, with adjacent positioning elements 12 spaced apart. That is, multiple positioning elements 12 are spaced apart along the circumference of the element under test 30. The fact that three positioning elements 12 are spaced apart along the circumference means that the centers of these three positioning elements 12 are the same.

[0037] Specifically, multiple positioning elements 12 are fixedly installed on the base plate 11, with adjacent positioning elements 12 spaced apart. The outer wall of the positioning element 12 abuts against the inner wall 31 of the housing, forming multi-point support contact. When the housing is placed on the base plate 11, multiple positioning elements 12 simultaneously contact the inner wall 31 of the housing. The spaced arrangement ensures that the center distance between each positioning element 12 is greater than zero, avoiding mutual interference and thus providing uniform support force. For example, three positioning elements 12 can be arranged in an equilateral triangle with a spacing angle of 120 degrees; or four positioning elements 12 can be arranged in a square with a certain distance between them (the specific spacing distance can be set according to the size of the component 30 to be measured). The material of the positioning elements 12 can be stainless steel to improve wear resistance. The spaced arrangement of multiple positioning elements 12 avoids local stress concentration caused by the irregularity of the inner wall 31 after the housing is heated, ensuring that the housing remains horizontal and stable during measurement, achieving accurate positioning without additional adjustments.

[0038] The structure with multiple and spaced positioning elements 12 makes horizontal positioning more stable, thus avoiding the risk of tilting of the casing due to single-point positioning during measurement. This helps to improve the accuracy of measurement data and further solves the problem of measurement deviation caused by uneven positioning.

[0039] In one embodiment, the number of positioning elements 12 is at least three, and the three positioning elements 12 are equally spaced along the circumference of the element under test 30. The three positioning elements 12 being equally spaced along the circumference of the element under test 30 can be understood as the three positioning elements 12 being evenly distributed on the same circumference, which ensures the symmetry and balance of positioning, and is beneficial to accurate positioning and assembly.

[0040] Specifically, three positioning elements 12 are evenly spaced along the circumference of the element under test 30, for example, with an interval angle of 120 degrees. The outer wall of each positioning element 12 contacts the inner wall 31 of the housing to form a support point, and the evenly spaced distribution ensures that the contact points are evenly distributed on the circumference. During the operation of the measuring device 100, after the housing is placed on the base plate 11, the positioning elements 12 expand and abut against the inner wall 31 of the housing. The three equally spaced points simultaneously support the inner wall 31 of the housing, avoiding local displacement. For example, the positioning elements 12 can be equilateral triangles or equilateral trapezoids with an interval angle of 120 degrees; the spacing between the positioning elements 12 can be 1 / 3 of the inner diameter of the housing, and can be calculated based on the actual dimensions to set the equal intervals; the material of the positioning elements 12 can be stainless steel to improve wear resistance and corrosion resistance, ensuring long-term stability.

[0041] The structure of three positioning elements 12 arranged at equal intervals along the circumference ensures a uniform distribution of support points, thereby avoiding local stress concentration caused by uneven distribution of measurement points. This helps improve the accuracy and consistency of measurement data and further solves the measurement deviation problem caused by uneven positioning.

[0042] like Figure 6 As shown, in one embodiment, the outer surface of the sidewall of the positioning member 12 is an arc surface 122, which abuts against the inner wall 31 of the element to be tested 30.

[0043] Specifically, the positioning component 12 is a three-jaw positioning expansion sleeve. The sidewall of the positioning component 12 is defined as the first sidewall 121, and the outer surface of the first sidewall 121 is designed as an arc surface 122. This arc surface 122 can adaptively fit the shape of the inner wall 31 of the housing. For example, if the inner wall 31 of the housing is cylindrical, the outer surface of the first sidewall 121 of each positioning component 12 can be designed as an arc surface to facilitate contact with the inner wall 31 of the housing. When the positioning component 12 expands, the arc surface 122 forms a uniform contact surface with the inner wall 31 of the housing, avoiding uneven local force and positioning misalignment caused by the irregularity of the inner wall 31 in traditional three-point positioning. For another example, the arc surface 122 of the positioning component 12 can be designed as an adjustable curvature structure to adapt to housings with different degrees of thermal expansion; laser processing technology can also be used to ensure the accuracy of the arc surface 122. Compared to point contact in existing technologies, the arc surface 122 design enables the positioning element 12 to generate continuous support force when it contacts the inner wall 31 of the housing, thereby maintaining the stability of horizontal positioning during measurement. When the inner wall 31 becomes irregular in shape after the housing is heated, the arc surface 122 can dynamically adjust the contact angle to ensure that the measuring head 231 maintains stable contact with the inner wall 31 during sliding and lifting.

[0044] The outer surface of the first sidewall 121 of the positioning element 12 is designed with an arc surface 122, which increases the contact area between the positioning element 12 and the inner wall 31 of the housing, thereby achieving more stable positioning. This allows the positioning element 12 to make surface contact rather than point contact when in contact, so as to generate continuous support force. This avoids positioning misalignment caused by irregularity of the inner wall 31 during the measurement of the housing, thereby improving the accuracy of the measurement data and protecting the inner wall 31 of the housing from scratches.

[0045] like Figure 1 , Figure 2 , Figure 6 As shown, in one embodiment, the support assembly 10 further includes: a first driving member 13 and a slider 14 disposed on the top surface 131 of the first driving member 13. The first driving member 13 drives the slider 14 to move radially from the center of the top surface 131 to the surrounding area along the radial direction of the element to be measured 30. The positioning member 12 is disposed in a one-to-one correspondence with the slider 14, and the slider 14 drives the positioning member 12 to move synchronously.

[0046] Specifically, the first driving component 13 can be a cylinder or a servo motor. The slider 14 is disposed on the top surface 131 of the first driving component 13. The positioning component 12 is installed in a one-to-one correspondence with the slider 14. For example, the positioning component 12 can cover or be sleeved on the slider 14. The first driving component 13 drives the slider 14 to move radially along the center line of the top surface 131, and the slider 14 drives the positioning component 12 to move synchronously. Specifically, a linear slide rail 15 can be used as the guide structure for the slider 14 to improve the smoothness of movement. Alternatively, the first driving component 13 can be designed as an electric telescopic rod to drive the positioning component 12 to automatically lift and lower, achieving precise position control. When the first driving component 13 is started, the slider 14 moves radially outward along the element to be measured 30, driving the positioning component 12 to expand synchronously, so that the positioning component 12 is evenly attached to the inner wall 31 of the housing, ensuring accurate positioning and no skew during measurement, and completing multi-point contact and measurement without manual adjustment.

[0047] The first driving component 13 drives the slider 14, making the movement of the positioning component 12 smoother and thus improving the positioning accuracy. The slider 14 moves radially and drives the positioning component 12 to move synchronously, making the contact position between the positioning component 12 and the inner wall 31 of the housing more uniform, which helps to eliminate measurement deviations caused by uneven positioning. In addition, the synchronous movement of the positioning component 12 driven by the slider 14 makes the consistency of multi-point measurement data higher, further improving the reliability of the measurement results.

[0048] like Figures 1 to 8 As shown, in one embodiment, the support assembly 10 further includes a slide rail 15 and a connector 16. The slide rail 15 is disposed on the top surface 131 of the first drive member 13 and is radially offset from the slider 14. Specifically, multiple sliders 14 can surround one end of the side wall of the slide rail 15, specifically the outer surface of the side wall of the slide rail 15 near the top surface 131 of the first drive member 13. The offset design between the slide rail 15 and the slider 14 avoids interference between the slider 14 and the slide rail 15 when the slider 14 moves radially. When the first drive member 13 drives the slider 14 to move radially along the top surface 131 of the first drive member 13, the connector 16 acts as a fixed fulcrum to stably support the slide rail 15, and the slide rail 15 acts as a guide component to ensure the accurate movement trajectory of the slider 14.

[0049] like Figures 7 to 8 As shown, the connector 16 has a body portion 161 and a stepped portion 162 extending toward the slide rail 15, the size of the stepped portion 162 being smaller than the size of the body portion 161; the body portion 161 has a first groove 1611 and a second groove 1612 extending further toward the stepped portion 162 along a portion of the bottom wall of the first groove 1611, the first groove 1611 being connected to the first drive member 13. (See also...) Figures 1 to 2 , Figure 6For example, the first groove 1611 and the first driving member 13 can be connected by threaded connection, bolt connection, snap-fit ​​or plug-in connection, which facilitates disassembly and installation. The body part 161 of the connector 16 is fixedly connected to the top surface 131 of the first driving member 13 through the first groove 1611, and the positioning member 12 is embedded in the second groove 1612 of the body part 161 to ensure that the positioning member 12 maintains a stable position during the movement of the slider 14. The dimensions of the first groove 1611 and the second groove 1612 can be set as needed. In this embodiment, the depth of the first groove 1611 is less than the depth of the second groove 1612, and the side wall dimension (e.g., width) of the first groove 1611 is greater than the side wall dimension (e.g., width) of the second groove 1612.

[0050] The stepped portion 162 has a third groove 1621, and the end of the slide rail 15 facing away from the measuring component 20 is embedded in the third groove 1621. The positioning member 12 is embedded in the second groove 1612 and moves synchronously with the slider 14, and uniformly conforms to the inner wall 31 of the housing to achieve stable multi-point measurement without external vibration interference. The end of the slide rail 15 facing away from the measuring component 20 is embedded in the third groove 1621, so that the slide rail 15 and the connecting member 16 form a rigid connection. The above-mentioned embedding methods can all be further fixed by threaded connection, bolt connection, snap-fit ​​or plug-in connection, which facilitates disassembly and installation and improves installation stability. In addition, the connecting member 16 can be integrally formed to reduce assembly errors, or the connecting member 16 can be made of high-strength aluminum alloy material to improve structural rigidity.

[0051] The positioning element 12 is embedded in the second groove 1612, which makes the positioning element 12 firmly fixed, so that the positioning element 12 does not shift during the measurement process, thus improving the consistency of the measurement data. The slide rail 15 is embedded in the third groove 1621, which makes the slide rail 15 and the connecting element 16 firmly connected, thereby reducing vibration during the measurement process and further improving the measurement accuracy. The slide rail 15 and the slider 14 are staggered, so that the slide rail 15 and the slider 14 do not interfere with each other when moving, thus achieving a smooth measurement process and facilitating the acquisition of more accurate housing expansion data.

[0052] In one embodiment, the measuring assembly 20 further includes a mounting base 21 and a sliding sleeve 22. The mounting base 21 has a first through hole 211 through which the slide rail 15 passes. The sliding sleeve 22 is disposed on the mounting base 21. The sliding sleeve 22 is sleeved on the slide rail 15 and is configured to slide along the axial direction of the slide rail 15, thereby driving the mounting base 21 and the plurality of measuring heads 231 to move up and down.

[0053] Specifically, the mounting base 21 serves as the basic support component of the measuring assembly 20 and can be a measuring dial. A sliding sleeve 22 is mounted on the mounting base 21 and fitted around the outer periphery of the slide rail 15, forming a sliding fit that allows the sliding sleeve 22 to move smoothly along the axial direction of the slide rail 15. The sliding sleeve 22 can pass through the mounting base 21 and be fixed to it via its bottom end, for example, by screw connection or welding. The sliding sleeve 22 may have a second through hole 222 through which it is fitted onto the slide rail 15. The second through hole 222 is used to axially fix the slide rail 15, ensuring its stable position during measurement. The sliding sleeve 22 can be rigidly connected to multiple measuring heads 231 via a mechanical structure (e.g., a connecting rod, not shown), such as a threaded connection, bolt connection, snap-fit, or plug-in connection. When the sliding sleeve 22 slides along the slide rail 15, it drives the measuring heads 231 to move synchronously up and down along the axial direction, achieving precise adjustment of the height of the measuring heads 231. Specifically, an integrally molded aluminum alloy mounting base 21 can be used to improve structural rigidity; a sliding sleeve 22 with a Teflon coating can be used, which reduces sliding friction through the extremely low coefficient of friction and excellent self-lubricating properties of the Teflon material; an annular groove (not shown) can also be provided on the inner surface of the side wall (defined as the second side wall 221) of the sliding sleeve 22 to enhance the guiding fit with the slide rail 15 and ensure accurate sliding direction without deviation.

[0054] The sliding sleeve 22 passes through the first through hole 211, making the sliding sleeve 22 securely positioned in the mounting base 21, thereby reducing lateral vibration during the measurement process. The sliding sleeve 22 is fitted onto the slide rail 15, reducing friction during the sliding process and maintaining a stable sliding direction, thereby improving the accuracy of the measurement data. The sliding sleeve 22 drives the mounting base 21 and multiple measuring heads 231 to move up and down, so that the measuring heads 231 can adjust their height synchronously to make uniform contact with the inner wall 31 of the housing, which is conducive to realizing multi-point synchronous measurement and further improving the reliability of the measurement data.

[0055] like Figures 1 to 2 , Figure 9 As shown, in one embodiment, the measuring component 20 further includes a plurality of measuring elements 23, each measuring element 23 having a measuring head 231 at one end; the other end of the measuring element 23 is connected to the side wall (second side wall 221) of the sliding sleeve 22; the plurality of measuring elements 23 are equally spaced on the mounting base 21.

[0056] Specifically, one end of the measuring element 23 can be fixedly mounted with the measuring head 231 (i.e., the dial indicator probe), and the other end can be rigidly connected to the second side wall 221 of the sliding sleeve 22 by means of bolts, threads, or clips; multiple measuring elements 23 are evenly distributed along the circumference of the mounting base 21. For example, five measuring elements 23 can be arranged at 360-degree equal intervals. Lightweight aluminum alloy measuring elements 23 can be used to reduce the influence of inertia; the measuring elements 23 can be designed as adjustable length structures to adapt to housings of different diameters. When the sliding sleeve 22 moves up and down along the slide rail 15, the measuring elements 23 drive each measuring head 231 to move up and down synchronously, ensuring that the contact points of each measuring head 231 on the inner wall 31 of the housing evenly cover the circumference, realizing multi-point synchronous measurement and avoiding local errors caused by single-point measurement or too few measuring points.

[0057] By setting multiple measuring elements 23 at equal intervals, the measuring points are evenly distributed on the circumference of the casing, thereby improving the representativeness of the measurement data and avoiding local errors caused by the concentration of measuring points. By rigidly connecting the other end of the measuring element 23 to the second side wall 221 of the sliding sleeve 22, the measuring head 231 moves synchronously during the lifting and lowering of the sliding sleeve 22, which is conducive to achieving high-precision synchronous measurement. By setting multiple measuring heads 231 at equal intervals, the measurement data can more comprehensively reflect the expansion of the entire casing, thereby further improving the accuracy of the measurement results.

[0058] Furthermore, such as Figures 1 to 2 , Figure 10 As shown, in one embodiment, the measuring component 20 may further include a mounting sleeve 24, and a sliding sleeve 22 may be embedded in the mounting sleeve 24. The mounting sleeve 24 and the sliding sleeve 22 may be connected by means of threaded connection, plug-in connection, or snap-fit. The mounting sleeve 24 may have multiple third through holes 241. One end of the measuring element 23 is fixedly mounted with the measuring head 231, and the other end is rigidly connected to the side wall of the mounting sleeve 24 by means of bolt connection, threaded connection, or snap-fit. Multiple measuring elements 23 are evenly distributed along the circumference of the mounting base 21. By connecting the mounting sleeve 24 to the sliding sleeve 22 and multiple measuring elements 23 respectively, the mounting base 21, sliding sleeve 22, mounting sleeve 24 and multiple measuring elements 23 are fixedly formed into an integral structure and move up and down synchronously during the process of the measuring element 23 moving up and down with the slide rail 15.

[0059] like Figures 1 to 2 As shown, in one embodiment, the measuring assembly 20 further includes a clamping part 25, which is disposed on the side of the measuring member 23 away from the sliding sleeve 22, for fixing the measuring head 231.

[0060] Specifically, the clamping part 25 can be a chuck, located on the side of the measuring piece 23 away from the sliding sleeve 22, and in direct contact with the measuring head 231. The clamping part 25 can be fixed to the measuring head 231 by means of elastic snaps, spring clamps, or screw fastening. For example, a snap-on clamping structure can be used, where a groove (not shown) at the end of the measuring head 231 engages with a protrusion (not shown) of the clamping part 25 to achieve quick fixation; a spring clamping structure can also be used, where spring pressure makes the clamping part 25 evenly clamp the measuring head 231; or a screw fastening method can be used, where the measuring head 231 is pressed into the clamping part 25 by tightening the screw. When the sliding sleeve 22 moves linearly up and down along the slide rail 15, the clamping part 25 ensures that the measuring head 231 is stably in contact with the inner wall 31 of the housing, preventing the measuring head 231 from shifting due to vibration or external force, thereby maintaining accurate contact between the measuring head 231 and the inner wall 31 of the housing during the measurement process.

[0061] The measuring head 231 is fixed by the clamping part 25, so that the measuring head 231 maintains stable contact with the inner wall 31 of the housing during the lifting and lowering of the sliding sleeve 22, thereby further improving the accuracy of the measurement data. By setting the clamping part 25, the measuring head 231 is prevented from loosening, which helps to reduce the measurement error caused by the displacement of the measuring head 231, making the measurement results more accurate and reliable. The reliable cooperation between the clamping part 25 and the measuring head 231 makes the measurement process unnecessary to adjust, thereby further improving the measurement efficiency.

[0062] In one embodiment, the measuring element 23 is a dial indicator or a micrometer.

[0063] The measuring element 23 is a dial indicator or micrometer, with its measuring head 231 designed as a smooth probe. One end is rigidly connected to the second sidewall 221 or the sidewall of the mounting sleeve 24, and the other end is fixed to the measuring head 231. Multiple measuring elements 23 are evenly distributed along the circumference of the mounting base 21 to ensure that the measuring points uniformly cover the inner wall 31 of the housing. When the sliding sleeve 22 moves up and down along the slide rail 15, the measuring element 23 drives the measuring head 231 to move up and down synchronously, so that the measuring head 231 uniformly contacts the inner wall 31 of the housing and reflects the changes in the housing expansion in real time. Specifically, a dial indicator with an accuracy of 0.01 mm can be used for measurement, or a micrometer with an accuracy of 0.001 mm can be used to achieve higher accuracy measurement.

[0064] By using a dial indicator or micrometer as the measuring element 23, the measuring head 231 makes smooth contact with the inner wall 31 of the housing, avoiding scratches caused by sharp edges and thus preventing damage to the housing. The pointer movement of the dial indicator or micrometer accurately captures the minute radial deformation of the housing, thereby achieving high precision in the measurement data and improving the reliability of the measurement results.

[0065] This application converts the diameter change of the housing under different strokes after heating into the movement of a dial indicator or micrometer. This effectively improves the problem of difficulty in measuring the inner diameter of the housing after heating. Furthermore, the measurement data of this application is obtained from the movement of the dial indicator or micrometer, avoiding the problems of insufficient horizontal positioning, single measurement point, and easy scratching of the housing that occur with the three-jaw measuring ruler in the prior art.

[0066] When using this application, the housing is placed stably on the base plate 11, and the expansion positioning piece 12 is used to horizontally position and fix the housing. After fixing, the mounting base 21 is placed into the housing through the slide rail 15 for measurement. After measurement, the expansion amount of the housing after heating is obtained based on the measurement data of multiple measuring pieces 23 (such as the jump of five dial indicators).

[0067] like Figures 1 to 2 , Figure 10 As shown, in another embodiment, the measuring device 100 further includes a clamping mechanism 26, which includes a clamping part 261 and a second driving member (not shown). The clamping part 261 is used to clamp the measuring component 20. The support component 10 further includes a slide rail 15, and the second driving member is configured to drive the clamping part 261 and the measuring component 20 to slide along the axial direction of the slide rail 15.

[0068] Specifically, in this embodiment, the manual pulling of the mounting base 21 is replaced by automatic lifting and lowering via an automatic device. The clamping part 261 clamps the measuring component 20. Specifically, it can clamp the sliding sleeve 22 through a three-jaw clamping mechanism. For example, the end of the sliding sleeve 22 facing away from the mounting base 21 is extended, and the clamping part 261 clamps the end of the sliding sleeve 22 facing away from the mounting base 21. The device records the descent stroke and integrates it with the measurement data of the housing to fit the expansion amount of the housing at different strokes. For example, multiple measurements are taken along the top to the bottom of the housing. The housing expansion amount measured at the first position (near the axial top of the housing) is 0.2, the housing expansion amount measured at the second position (near the axial middle of the housing) is 0.4, the housing expansion amount measured at the third position (near the axial bottom of the housing) is 0.3, and so on. The data of the housing expansion amount measured multiple times are recorded and integrated to obtain the housing expansion amount data at that temperature.

[0069] The second driving component is a device that provides driving force, such as a cylinder or motor, and can be connected to the clamping part 261 via a piston rod or transmission rod. The slide rail 15 is a guide rail provided on the support assembly 10, used to constrain the movement path of the measuring assembly 20. When the second driving component is started, it drives the clamping part 261 through the transmission mechanism, causing the measuring assembly 20 to move axially along the slide rail 15, so that multiple measuring heads 231 simultaneously contact different positions on the inner wall 31 of the housing. Specifically, a pneumatic cylinder can be used as the second driving component, achieving rapid driving through compressed air; a stepper motor can also be used for precise position control; or a manual knob adjustment mechanism can be used to facilitate adjustment of the sliding distance during low-speed measurement.

[0070] The clamping part 261 and the measuring component 20 are driven to slide along the slide rail 15 by the second driving member, so that the measurement process does not require manual pushing, which helps to improve the measurement efficiency; the slide rail 15 provides stable guidance, making the sliding process smoother, which helps to improve the accuracy of the data; the clamping part 261 fixes the measuring component 20, so that the measuring component 20 maintains a stable position during sliding, which helps to prevent fluctuations in the measurement data.

[0071] In one embodiment, the second drive member is also configured to drive the clamping part 261 and the measuring component 20 to rotate radially relative to the slide rail 15.

[0072] The second driving component is connected to the clamping part 261, which is used to fix the measuring component 20 and drive the measuring component 20 to move synchronously. The slide rail 15 provides the axis of rotation. When the second driving component is activated, it drives the clamping part 261 to rotate circumferentially around the slide rail 15, thereby driving the measuring component 20 to rotate at a small angle. In a specific embodiment, a stepper motor can be used to drive the rotating shaft to achieve precise angle control; or a worm gear mechanism can be used to provide a self-locking function to prevent rotational deviation. The rotation angle range can be set from 0 to 360 degrees to cover the entire circumference of the inner wall 31 of the housing. The specific rotation angle can be set as needed. Figure 10 In the middle X, it is the direction in which the second driving member drives the clamping part 261 and the measuring component 20 to rotate relative to the slide rail 15.

[0073] During operation, the measuring component 20 is driven by the drive component to move up and down while rotating at a small angle, so that the dial indicator contacts and records the fluctuation data at different positions on the inner wall 31 of the housing, thus avoiding the error of manually rotating the measuring dial.

[0074] The second driving component drives the clamping part 261 and the measuring component 20 to rotate relative to the slide rail 15, and five measuring points are evenly distributed in the circumferential direction of the housing, which further improves the accuracy of the measurement data; so that the measurement of the housing's full-circumference expansion does not require manual adjustment, thereby realizing the rapid acquisition of the housing's full-circumference data, which is conducive to improving measurement efficiency and data reliability.

[0075] Furthermore, a sensor (not shown) can be connected to the dial indicator 23, so that the dial indicator contacts the inner wall 31 of the housing at different positions and the sensor can record the fluctuation data. The fluctuation data of the dial indicator is automatically uploaded to the background system (not shown) of the measuring device 100 for recording and statistics, thereby improving the efficiency of measurement and data transmission.

[0076] The measuring device 100 disclosed in this application includes a support assembly 10 and a measuring assembly 20. The support assembly 10 includes a base plate 11 and a positioning member 12 disposed on the base plate 11. One end of the positioning member 12 abuts against the inner wall 31 of the element to be measured 30 to horizontally position the element to be measured 30. The measuring assembly 20 is slidably connected to the support assembly 10. The measuring assembly 20 includes multiple measuring heads 231, which abut against the inner wall 31 of the element to be measured 30 to measure the inner diameter of the element to be measured 30. This application uses the positioning member 12 to horizontally position the element to be measured 30, thereby ensuring that the measuring device 100 remains stable and the measuring points are consistent in the horizontal direction during measurement. This avoids the problem of inaccurate positioning of the element to be measured 30 (e.g., a housing) due to thermal expansion, and aligns the center of the element to be measured 30 with the reference of the measuring device 100, achieving accurate measurement. At the same time, the positioning member 12, in conjunction with the multiple measuring heads 231, makes the measured data more accurate. The measuring device 100 provided in this application will not scratch the inner wall 31 of the housing. Compared with other measuring methods (which, if not operated correctly, will scratch the inner wall 31 of the housing, leading to the scrapping of the housing), this application has the advantage of cost saving. After positioning the housing, this application can directly obtain measurement data by lifting the mounting base 21, which is convenient to operate and saves training costs compared to other methods. During assembly, the measuring device 100 of this application can be used by simply placing the housing directly on the mounting base 21, avoiding the problem of manually supporting the housing in other methods, which can easily cause the housing to tilt and the measurement data to be inaccurate. Therefore, the measurement data of this application is accurate and easy to use.

[0077] It should be noted that the accompanying drawings are only for illustrating the technical solution of this application. In actual applications, there may be other similar structures, such as changing the diameter of the casing, using two mounting bases 21 on the same base plate 11, etc. In this application scenario, they should all be regarded as variations of this application.

[0078] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A measuring device, characterized in that, include: The support assembly includes a base plate and a positioning member disposed on the base plate, one end of the positioning member abutting against the inner wall of the element under test to horizontally position the element under test. A measuring component is slidably connected to the supporting component; the measuring component includes multiple measuring heads, each of which abuts against the inner wall of the element under test to measure the inner diameter of the element under test.

2. The measuring device according to claim 1, characterized in that, The number of positioning elements is multiple, and adjacent positioning elements are spaced apart.

3. The measuring device according to claim 2, characterized in that, The number of positioning elements is at least three, and the three positioning elements are arranged at equal intervals along the circumference of the element to be measured.

4. The measuring device according to any one of claims 1 to 3, characterized in that, The outer surface of the side wall of the positioning component is an arc surface, which abuts against the inner wall of the element to be tested.

5. The measuring device according to claim 1, characterized in that, The support components also include: A first driving member and a slider disposed on the top surface of the first driving member, wherein the first driving member drives the slider to move radially from the center of the top surface to the surrounding area along the radial direction of the element to be measured; a positioning member is disposed in a one-to-one correspondence with the slider, and the slider drives the positioning member to move synchronously.

6. The measuring device according to claim 5, characterized in that, The support components also include: A slide rail is disposed on the top surface of the first driving member and is radially offset from the slider; The connector has a body portion and a stepped portion extending toward one side of the slide rail; the body portion has a first groove and a second groove extending further toward the stepped portion along a portion of the bottom wall of the first groove, the first groove being connected to the first drive member; the positioning member is embedded in the second groove; the stepped portion has a third groove, and one end of the slide rail away from the measuring component is embedded in the third groove.

7. The measuring device according to claim 6, characterized in that, The measurement component also includes: The mounting base has a first through hole, through which the slide rail passes; A sliding sleeve is disposed on the mounting base; the sliding sleeve is sleeved on the slide rail and is configured to slide along the axial direction of the slide rail, thereby driving the mounting base and the plurality of measuring heads to move up and down.

8. The measuring device according to claim 7, characterized in that, The measurement component also includes: Multiple measuring elements are provided, each having a measuring head at one end; the other end of each measuring element is connected to the side wall of the sliding sleeve; the multiple measuring elements are equally spaced on the mounting base.

9. The measuring device according to claim 8, characterized in that, The measurement component also includes: A clamping part is provided on the side of the measuring component away from the sliding sleeve, and is used to fix the measuring head.

10. The measuring device according to claim 7 or 8, characterized in that, The measuring instrument is a dial indicator or a micrometer.

11. The measuring device according to claim 1, characterized in that, Also includes: The clamping mechanism includes a clamping part and a second driving member, the clamping part being used to clamp the measuring component; the support component further includes a slide rail, and the second driving member is configured to drive the clamping part and the measuring component to slide along the axial direction of the slide rail.

12. The measuring device according to claim 11, characterized in that, The second drive member is also configured to drive the clamping part and the measuring component to rotate radially relative to the slide rail.

13. The measuring device according to claim 1, characterized in that, The measuring head is a flexible structural component.

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