A hollow shaft wall thickness rapid measuring device

Abstract

The utility model discloses a hollow shaft wall thickness quick measuring device, including base assembly, mounting component and measuring tool, base assembly includes first base body and first measuring part, and first measuring part sets up in first base body, and mounting component includes second base body and second measuring part, and second base body is along first direction and is slidably arranged in first base body, and second measuring part sets up in second base body, and second measuring part and first measuring part are oppositely arranged, and measuring tool sets up in mounting component, and measuring tool is used for measuring the interval of first measuring part and second measuring part. Hollow shaft wall thickness quick measuring device solves how under the condition of not destroying hollow shaft, carries out wall thickness measurement to hollow shaft.

Description

Technical Field

[0001] This utility model relates to the field of measuring tools, and in particular to a device for rapid measurement of the wall thickness of a hollow shaft. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the drive motor, as one of the key components, has a crucial impact on the overall vehicle performance due to the machining accuracy and dimensional precision of its core structural component—the hollow shaft. Hollow shafts typically employ a hollow design, featuring geometric characteristics of large and small ends and stepped inner holes; that is, the inner diameter of the small end is smaller than that of the large end, forming a specific internal cavity step. This discontinuous and complex channel design, while enhancing strength and achieving lightweighting, also places higher demands on dimensional inspection.

[0003] Reference Figure 1 Under current technological conditions, the measurement of hollow shaft wall thickness mainly relies on traditional equipment such as conventional calipers, inside diameter gauges, or coordinate measuring machines (CMMs). However, due to the limitations of their probe structure, conventional calipers are difficult to penetrate the small end into the hollow shaft, especially when measuring the wall thickness of the large end cavity. This makes it difficult to achieve precise alignment of the measuring point and accurate data reading, resulting in large measurement errors and poor repeatability. While destructive cutting measurement using a CMM can obtain wall thickness data, this method requires cutting or opening a window in the product before measurement, making it an irreversible inspection method. This leads to the scrapping of the tested part, increasing inspection costs and material waste. Furthermore, the operation process is complex, time-consuming, and inefficient, making it difficult to meet the needs of rapid inspection in mass production.

[0004] Therefore, current technology still lacks a tool that can measure the wall thickness of hollow shafts without damaging them. Utility Model Content

[0005] One objective of this invention is to provide a rapid measurement device for the wall thickness of hollow shafts, which aims to solve the technical problem of how to measure the wall thickness of hollow shafts without damaging them.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a hollow shaft wall thickness rapid measuring device, comprising: a base assembly, including a first base and a first measuring part, wherein the first measuring part is disposed on the first base;

[0007] The mounting assembly includes a second base and a second measuring part. The second base is slidably disposed on the first base along a first direction, and the second measuring part is disposed on the second base. The second measuring part and the first measuring part are disposed opposite to each other.

[0008] A measuring tool, located on the mounting assembly, is used to measure the distance between the first measuring section and the second measuring section.

[0009] Optionally, the base assembly includes a first extension disposed on and protruding from the first base, and a first measuring portion disposed at the end of the first extension away from the first base;

[0010] The mounting assembly includes a second extension disposed on and protruding from the second base, and a second measuring portion disposed at the end of the second extension away from the second base.

[0011] Optionally, the first extension extends along the second direction, and the second extension extends along the second direction, which is inclined or perpendicular to the first direction.

[0012] Optionally, the measuring instrument can be detachably mounted on the second base.

[0013] Optionally, the mounting component includes a connecting part and a locking part. The connecting part is disposed on the second base and has a through hole and a locking hole. The locking hole and the through hole are connected. At least part of the measuring tool passes through the through hole, and the locking part passes through the locking hole and the through hole and clamps the measuring tool.

[0014] Optionally, the second substrate has a guide channel along the first direction, and the first substrate and the guide channel slide together.

[0015] Optionally, the second substrate includes a first part and a second part, the first part is disposed on the second part, a guide channel is formed between the first part and the second part, the first part and the second part together enclose the guide channel, and the second extension is disposed on the first part or the second part.

[0016] Optionally, the base assembly includes a gripping part with a limiting channel, and one side of the first base passes through the limiting channel and is connected to the gripping part.

[0017] Optionally, the base assembly includes a reference portion disposed on the side of the first base away from the grip portion, and a second base slidably disposed between the reference portion and the grip portion, with the measuring end of the gauge disposed opposite to the reference portion.

[0018] Optionally, the mounting component includes a force-applying part disposed on the second base and protruding from the second base.

[0019] Optionally, the mounting components include an anti-slip part, which is located on the side of the force-applying part away from the second substrate.

[0020] Optionally, the first measuring part is spherical, and the cross-sectional area of ​​the second measuring part gradually decreases in the direction away from the second substrate; or

[0021] The cross-sectional area of ​​the first measuring part gradually decreases in the direction away from the first substrate, and the second measuring part is spherical.

[0022] The beneficial effects of this utility model are as follows:

[0023] The hollow shaft wall thickness rapid measuring device includes a base assembly, which includes a first base and a first measuring part, the first measuring part being disposed on the first base; a mounting assembly, which includes a second base and a second measuring part, the second base being slidably disposed on the first base along a first direction, the second measuring part being disposed on the second base, the second measuring part and the first measuring part being disposed opposite to each other; and a measuring tool, which is disposed on the mounting assembly and is used to measure the distance between the first measuring part and the second measuring part. This explanation uses a micrometer as an example. In actual measurement, the second base is first slid towards the first measuring part, causing it to move forward until the second measuring part and the first measuring part come into contact. The measuring end of the gauge is then used as a reference for zeroing. Next, the second base is slid away from the first measuring part, causing the second measuring part to retract, creating an initial gap between the two measuring parts. This facilitates the insertion of the front end of the first base into the large end cavity of the hollow shaft. During insertion, the first measuring part enters the cavity along with the first base and rests against the inner wall of the section to be measured. The second base is then slid forward, moving the second measuring part in the first direction until it rests against the outer wall of the section. The reading obtained by the gauge at this point is the axial wall thickness at that location. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the cross-sectional structure of the hollow shaft provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure of the measuring tool provided in this embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the measuring tool provided in this embodiment of the utility model;

[0028] Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region A in the middle;

[0029] Figure 5 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region B in the middle;

[0030] Figure 6 This is an exploded structural diagram of the measuring tool provided in this embodiment of the utility model.

[0031] Explanation of icon numbers:

[0032] 20. Base assembly; 21. First base; 22. First measuring part; 23. First extension part; 24. Grip part; 241. Limiting channel; 25. Reference part; 30. Mounting assembly; 31. Second base; 311. First part; 312. Second part; 313. Guide channel; 32. Second measuring part; 33. Second extension part; 34. Connecting part; 341. Through hole; 342. Locking hole; 35. Locking part; 36. Force application part; 37. Anti-slip part; 40. Measuring tool; 41. Measuring end; 50. First direction; 60. Second direction; 70. Hollow shaft. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1 to 2 As shown, Figure 1 This is a schematic diagram of the cross-sectional structure of the hollow shaft 70 provided in this embodiment of the present invention. Figure 2 This is a schematic diagram of the overall structure of the measuring tool provided in this embodiment of the utility model.

[0035] This utility model provides a rapid measurement device for the wall thickness of a hollow shaft, comprising: a base assembly 20, including a first base 21 and a first measuring part 22, the first measuring part 22 being disposed on the first base 21; a mounting assembly 30, including a second base 31 and a second measuring part 32, the second base 31 being slidably disposed on the first base 21 along a first direction 50, the second measuring part 32 being disposed on the second base 31, the second measuring part 32 and the first measuring part 22 being disposed opposite to each other; and a measuring tool 40, the measuring tool 40 being disposed on the mounting assembly 30, the measuring tool 40 being used to measure the distance between the first measuring part 22 and the second measuring part 32.

[0036] This section uses a micrometer measuring instrument 40 as an example. In actual measurement, the measuring instrument 40 is used as a reference. First, the second base 31 is slid towards the first measuring part 22, causing the second base 31 to move the second measuring part 32 forward until the second measuring part 32 and the first measuring part 22 come into contact. The position of the measuring end 41 of the measuring instrument 40 in this state is used as a reference for zeroing. Then, the second base 31 is slid away from the first measuring part 22, causing the second measuring part 32 to retract, thus forming an initial gap between the two measuring parts. This facilitates the insertion of the front end of the first base 21 into the large end cavity of the hollow shaft 70. During the insertion of the first base 21, the first measuring part 22 enters the cavity along with the first base 21 and abuts against the inner wall of the section to be measured. Then, the second base 31 is continued to slide forward, causing the second measuring part 32 to move in the first direction 50 until it abuts against the outer wall of the section. At this point, the reading measured by the measuring instrument 40 is the axial wall thickness at that location.

[0037] To further improve measurement accuracy, the operator rotates the hollow shaft 70 around the axis at small angles clockwise and counterclockwise, so that the hollow shaft wall thickness rapid measuring device forms a contact relationship with the hollow shaft 70 cross section at different angles, thereby eliminating the influence of local deviations caused by non-circular cross section, eccentric measuring point, or manual assembly; during the rotation, the minimum value read by the measuring instrument 40 is the true minimum wall thickness at that cross section.

[0038] Through the above structural design and operation method, this device realizes high-precision wall thickness detection of hollow shaft 70 with complex structure under non-destructive conditions, thereby reducing the production cost and production cycle of hollow shaft 70.

[0039] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The base assembly 20 includes a first extension 23, which is disposed on the first base 21 and protrudes from the first base 21. A first measuring part 22 is disposed at the end of the first extension 23 away from the first base 21.

[0040] The mounting assembly 30 includes a second extension 33 disposed on and protruding from the second base 31, and a second measuring part 32 disposed at the end of the second extension 33 away from the second base 31.

[0041] In practical applications, to address the issues of the hollow shaft 70 having a deep inner cavity, a complex stepped hole structure, and the difficulty for conventional hollow shaft wall thickness rapid measurement devices to penetrate deeply into the target cross-section for precise contact, this application provides a first extension 23 and a second extension 33 on the base assembly 20 and the mounting assembly 30, respectively. The first extension 23 extends from the first base 21 and has a first measuring part 22 at its far end, while the second extension 33 extends from the second base 31 and has a second measuring part 32 at its far end. This effectively increases the reachability of the probe, enabling the first measuring part 22 to penetrate deep into the hollow shaft 70 and align with the cross-section to be measured. During the measurement process, the operator moves the first base 21 to insert the first measuring part 22, along with the first extension 23, into the large end cavity of the hollow shaft 70, so that the first measuring part 22 abuts against the inner wall of the target cross-section. Then, the operator pushes the second base 31 forward along the first direction 50. Since the second measuring part 32 is located at the end of the second extension 33, it also moves forward until it abuts against the outer wall, thus achieving the clamping measurement of the wall thickness of the cross-section. This structural design, without changing the positional relationship between the first base 21 and the second base 31, significantly improves the "penetration" of the measuring part by providing a protruding extension. This not only meets the depth measurement requirements of the stepped hole at the large end of the hollow shaft 70 but also avoids interference between the base and the workpiece.

[0042] Further, see Figure 2 The first extension 23 extends along the second direction 60, and the second extension 33 extends along the second direction 60. The second direction 60 is inclined or perpendicular to the first direction 50.

[0043] In practical applications, both the first extension 23 and the second extension 33 extend along the second direction 60, which is inclined or perpendicular to the first direction 50 of the hollow shaft wall thickness rapid measuring device. This allows the measuring part to approach the inner and outer walls of the hollow shaft 70 from a non-coaxial direction. In practical applications, when the first base 21 is inserted into the cavity of the hollow shaft 70, the first measuring part 22 is driven into the measurement area inside the shaft body through the first extension 23 extending along the second direction 60, while avoiding the steps or orifice edges of the shaft body's inner wall. Subsequently, the second base 31 slides towards the first direction 50, and the second measuring part 32 on it enters the outer region of the measurement section from a lateral or inclined direction through the second extension 33, so that the two measuring parts respectively abut against the inner and outer walls of the section. By designing the contact direction of the two measuring parts to be non-collinear or non-axial, structural interference can be effectively avoided, improving the alignment accuracy and operability of the measuring head.

[0044] In one embodiment, see Figure 2 and Figure 5 The measuring tool 40 is detachably mounted on the second base 31.

[0045] In practical applications, the measuring instrument 40 in traditional hollow shaft wall thickness rapid measurement devices is fixedly connected to the mechanism, making disassembly and assembly difficult and resulting in cumbersome calibration, maintenance, or replacement operations. This application proposes to detachably mount the measuring instrument 40 to the second base 31, that is, to install the measuring instrument 40 to the second base 31 through a detachable structure (such as screw connection, snap-fit, or sliding fit), thereby achieving a modular functional connection between the measuring instrument 40 and the mounting component 30. In actual operation, the measuring instrument 40 is assembled to the second base 31 through a fixed structure, so that the second base 31 can synchronously drive the measuring instrument 40 and the second measuring part 32 to move together during the sliding process, thereby realizing dynamic reading of the distance between the first measuring part 22 and the second measuring part 32; when it is necessary to change the model of the measuring instrument 40 (such as higher precision, larger range) or to perform independent calibration, zeroing, or maintenance, the operator can quickly remove the measuring instrument 40 from the second base 31 without disassembling the entire device structure. This structural design not only improves the overall ease of maintenance and the versatility of parts, but also significantly enhances the flexibility of the gauge configuration and its adaptability to the field, meeting the requirements for functional expansion and rapid replacement under different measurement needs.

[0046] Optionally, see Figure 5 and Figure 6 The mounting assembly 30 includes a connecting part 34 and a locking part 35. The connecting part 34 is disposed on the second base 31. The connecting part 34 has a through hole 341 and a locking hole 342. The locking hole 342 and the through hole 341 are connected. At least part of the measuring tool 40 passes through the through hole 341. The locking part 35 passes through the locking hole 342 and the through hole 341 and clamps the measuring tool 40.

[0047] In practical applications, to address potential issues such as insecure assembly, inaccurate positioning, and wobbling during measurement in the detachable structure of the measuring tool 40, this application further incorporates a connecting part 34 and a locking part 35 in the mounting assembly 30. The connecting part 34 is located on the second base 31 and forms a through hole 341 and a locking hole 342. The through hole 341 is used for inserting the measuring tool 40, and the locking hole 342 communicates with the through hole 341. The locking part 35 passes through the locking hole 342 and clamps the measuring tool 40, thereby achieving a stable installation while ensuring detachability. In actual use, the measuring end 41 of the measuring tool 40 passes through the through hole 341 of the connecting part 34. The locking part 35 laterally passes through the locking hole 342 and forms a clamping force with the through hole 341, firmly positioning the measuring tool 40 and preventing axial displacement or wobbling during the sliding process of the second base 31. This structure ensures, on the one hand, that the measuring instrument 40 performs the distance measurement function as the second base 31 reciprocates, i.e., the second base 31 drives the measuring instrument 40 to move and complete the wall thickness measurement; on the other hand, it facilitates easy assembly and disassembly, allowing for quick replacement or maintenance of the measuring instrument 40 without tools. The structural design of the through hole 341 and the locking hole 342 provides the measuring instrument 40 with a clear positioning reference and clamping channel during assembly, ensuring the consistency of the measuring instrument 40's axis with the measurement direction, improving measurement accuracy and repeatability, while also enhancing the safety and adaptability of the device structure, meeting the dual requirements of reliability and maintainability in long-term use scenarios.

[0048] In one embodiment, reference is made to Figure 6 The second substrate 31 has a guide channel 313 along the first direction 50, and the first substrate 21 and the guide channel 313 are slidably engaged.

[0049] In practical applications, to address the potential for deviation, swaying, or jamming of the second base 31 during movement, leading to measurement errors or poor repeatability, this application provides a guide channel 313 on the second base 31. The first base 21 slides within the guide channel 313, achieving precise guidance and constraint of the second base 31 along the first direction 50. In actual operation, the first base 21 serves as a load-bearing and reference benchmark, its shape forming a tight fit with the inner wall of the guide channel 313, ensuring that the second base 31 can only slide along the first direction 50, consistent with the wall thickness measurement direction, preventing offset or rotational movement. During measurement, the operator pushes the second base 31, and the guide channel 313 guides it to move linearly relative to the first base 21. This movement causes the second measuring part 32 to move closer to or further away from the first measuring part 22, thereby adjusting the distance between the measuring parts. Simultaneously, the measuring instrument 40 records the distance change between the two measuring parts. This structure achieves the singularity and accuracy of the movement direction of the second substrate 31 through the guide channel 313, significantly improving the overall operational stability and measurement repeatability of the device, avoiding measurement deviations caused by assembly or operational errors, and providing a solid execution foundation for high-precision wall thickness detection under the complex structure of the hollow shaft 70.

[0050] Optionally, refer to Figure 6 The second base 31 includes a first part 311 and a second part 312. The first part 311 is disposed on the second part 312. A guide channel 313 is formed between the first part 311 and the second part 312. The first part 311 and the second part 312 together enclose the guide channel 313. The second extension 33 is disposed on the first part 311 or the second part 312.

[0051] In practical applications, addressing the limitations of the integrated structure of the guide channel 313 in terms of processing accuracy, assembly adjustment, and rigidity control, this application proposes to subdivide the second base 31 into a first part 311 and a second part 312, which together form the guide channel 313, giving the guide structure greater assembly flexibility and manufacturing adaptability. Specifically, the first part 311 is disposed on the second part 312, and the two are connected by a specific method (such as plug-in, snap-fit, bolt connection, or welding), and a guide channel 313 is constructed between their mating surfaces to form a sliding fit with the first base 21. In actual use, the guide channel 313, as the core of the functional structure of the second base 31, can be precision adjusted during the manufacturing stage according to assembly needs, avoiding fit clearance errors or increased processing costs caused by integrated molding; at the same time, the separability of the assembly structure facilitates subsequent maintenance and replacement. Furthermore, the second extension 33 can be selectively located in either the first part 311 or the second part 312 according to measurement requirements, making the installation position of the measuring unit more flexible and effectively adapting to the structural dimensions and internal cavity positions of different hollow shafts 70, thereby improving the alignment accuracy of the probe and the adjustability of the structure. While ensuring guiding accuracy, this structure improves the assembly convenience of the hollow shaft wall thickness rapid measurement device through its modular, split design.

[0052] Optionally, refer to Figure 6 The base assembly 20 includes a gripping part 24, which has a limiting channel 241. One side of the first base 21 passes through the limiting channel 241 and is connected to the gripping part 24.

[0053] In practical applications, addressing the problems of wobbling, positioning misalignment, and reading fluctuations in traditional hollow shaft wall thickness rapid measurement devices caused by operator instability during use, this application incorporates a gripping part 24 in the base assembly 20, with a limiting channel 241 formed thereon. One side of the first base 21 passes through the limiting channel 241 and connects to the gripping part 24, thus forming a stable support and precise limiting structure for the first base 21. During actual use, the operator controls the posture and movement of the entire hollow shaft wall thickness rapid measurement device by holding the gripping part 24. The gripping part 24 provides rigid constraint to the first base 21 through the limiting channel 241, ensuring its stable posture during measurement and preventing wobbling or measurement errors caused by inaccurate gripping. Meanwhile, since the first base 21 passes through the limiting channel 241 and is connected to the grip 24, the grip 24 can play a dual role for the first base 21: on the one hand, it provides support and guidance reference to ensure that the first measuring part 22 is inserted into the hollow shaft 70 in the correct direction for clamping and positioning; on the other hand, it provides the operator with a clear and comfortable gripping position, reducing the burden of long-term operation and improving the stability and repeatability during use.

[0054] Furthermore, referring to Figure 2and Figure 5 The base assembly 20 includes a reference portion 25, which is disposed on the side of the first base 21 away from the grip portion 24. The second base 31 is slidably disposed between the reference portion 25 and the grip portion 24. The measuring end 41 of the measuring instrument 40 is disposed opposite to the reference portion 25.

[0055] In practical applications, this application provides a reference part 25 on the side of the first base 21 away from the grip 24, and the measuring end 41 of the measuring instrument 40 is positioned opposite to the reference part 25, thereby constructing a clear and stable measurement starting point reference surface. During actual use, the operator pushes the second base 31 to slide along the first direction 50 between the reference part 25 and the grip 24, thereby causing the second measuring part 32 to move closer to or further away from the first measuring part 22, and the measuring instrument 40 records the distance change between the two measuring parts. Since the measuring end 41 of the measuring instrument 40 is always aligned with the reference part 25, its distance reference point is fixed, avoiding errors caused by changes in device posture or zero-point drift. Furthermore, the reference part 25, as the direct support object of the measuring instrument 40, can also withstand the local stress generated by the movement of the second base 31, improving the overall structural rigidity. Further, this structure, by limiting the sliding path of the second base 31 to a stable region between the grip 24 and the reference part 25, forms a clear measurement channel and a precise fitting reference, ensuring that the measurement process has a clear starting point, a clear path, and a stable ending point. In summary, this structure, by setting up an independent measuring tool 40 as the measurement reference, ensures the consistency, repeatability, and measurement accuracy of the distance measurement results, and is a key auxiliary mechanism for achieving highly reliable wall thickness measurement.

[0056] In one embodiment, reference is made to Figure 2 The mounting component 30 includes a force-applying part 36, which is disposed on the second base 31 and protrudes from the second base 31.

[0057] In practical applications, to enhance the operator's control over the movement of the second base 31 and make the hollow shaft wall thickness rapid measuring device more flexible and stable during positioning, clamping, and distance measurement, this application adds a force-applying part 36 to the mounting assembly 30. The force-applying part 36 protrudes from the second base 31, allowing the operator to directly apply force to the force-applying part 36 to push the second base 31 to slide along the first direction 50. In actual use, the operator can precisely control the movement of the second base 31 relative to the first base 21 by pressing or pushing the force-applying part 36 with their finger or thumb, thereby causing the second measuring part 32 to move closer to or further away from the first measuring part 22, achieving the setting and adjustment of the measurement distance. Because the force-applying part 36 is located on the surface of the second base 31 and protrudes from the main structure, its position is more easily identified and operated by the operator, improving the intuitiveness and response efficiency of human-machine interaction. Compared to directly pushing and pulling the base body, this structure improves operational comfort without affecting the overall compactness of the layout, and significantly reduces the impact of factors such as slippage, shaking, or fingers obstructing the measurement area on measurement stability during operation. In addition, the force application part 36 can also serve as a guide control node for the second base body 31 during the sliding process, ensuring the straightness of the movement and avoiding the accumulation of errors caused by skewness.

[0058] Furthermore, referring to Figure 2 The mounting component 30 includes an anti-slip part 37, which is disposed on the side of the force-applying part 36 away from the second base 31.

[0059] In practical applications, the operator needs to push the second base 31 along the first direction 50 using the force-applying part 36 to adjust the distance between the measuring parts. However, if the surface of the force-applying part 36 is smooth or the area where the finger contacts it is affected by sweat, oil, etc., it is easy to slip, misposition, or movement obstruction during operation, thus affecting the measurement accuracy and control continuity. To this end, this application adds an anti-slip part 37 on the side of the force-applying part 36 away from the second base 31 to enhance the friction between the operator's finger and the force-applying part 36. In terms of specific structure, the anti-slip part 37 can take the form of raised dots, stripes, frosted, rubber layer, or rough treatment to provide higher tactile feedback and anti-slip capability, so that the operator can still achieve stable and controllable propulsion movements even under complex conditions such as high-frequency operation, humid environment, or wearing gloves during the force application process. Since the anti-slip part 37 is arranged on the outside of the force-applying part 36, that is, the side directly affected by the finger, its position design conforms to the operation path and force direction, reducing measurement errors caused by misoperation or slippage.

[0060] In one embodiment, reference is made to Figure 4The first measuring part 22 is spherical, and the cross-sectional area of ​​the second measuring part 32 gradually decreases (i.e., conical) in the direction away from the second substrate 31; or the cross-sectional area of ​​the first measuring part 22 gradually decreases (i.e., conical) in the direction away from the first substrate 21, and the second measuring part 32 is spherical.

[0061] Since the two schemes described above function similarly, the explanation will be based on the example of the first measuring part 22 being spherical and the second measuring part 32 being conical.

[0062] In practical applications, the first measuring part 22 has a spherical structure, which is used to insert into the hollow shaft 70 and contact its inner wall. The spherical structure can provide stable point contact support, avoid insertion interference or lateral jamming, and ensure that the first measuring part 22 can flexibly adapt to the inner wall morphology with different curvatures, while reducing measurement errors caused by assembly angle deviations. The second measuring part 32 is used to contact the outer wall of the hollow shaft 70. Its structure is designed as a conical or oblique conical structure with a cross-sectional area that gradually decreases away from the second substrate 31. This structure makes it easy for the operator to adjust the contact position of the probe when it is close to the outer wall, and forms a measurement positioning point through a small area of ​​contact, making it easier for the probe to find the minimum point of the measurement value, i.e., the true wall thickness of the hollow shaft 70 at the point to be measured, during clockwise / counterclockwise fine adjustment.

[0063] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0064] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0065] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0066] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A device for rapid measurement of the wall thickness of a hollow shaft, characterized in that, include: A base assembly includes a first base and a first measuring part, wherein the first measuring part is disposed on the first base; The mounting assembly includes a second base and a second measuring part. The second base is slidably disposed on the first base along a first direction, and the second measuring part is disposed on the second base. The second measuring part and the first measuring part are disposed opposite to each other. A measuring tool is disposed on the mounting assembly, the measuring tool being used to measure the distance between the first measuring part and the second measuring part.

2. The rapid measurement device for hollow shaft wall thickness according to claim 1, characterized in that, The base assembly includes a first extension portion disposed on the first base and protruding from the first base, and a first measuring portion disposed at the end of the first extension portion away from the first base. The mounting assembly includes a second extension disposed on the second base and protruding from the second base, and a second measuring portion disposed at one end of the second extension away from the second base.

3. The rapid measurement device for hollow shaft wall thickness according to claim 2, characterized in that, The first extension extends along the second direction, and the second extension extends along the second direction, which is inclined or perpendicular to the first direction.

4. The rapid measurement device for hollow shaft wall thickness according to claim 1, characterized in that, The measuring tool is detachably mounted on the second base.

5. The rapid measurement device for hollow shaft wall thickness according to claim 4, characterized in that, The mounting assembly includes a connecting part and a locking part. The connecting part is disposed on the second base. The connecting part has a through hole and a locking hole. The locking hole and the through hole are connected. At least a portion of the measuring tool passes through the through hole. The locking part passes through the locking hole and the through hole and clamps the measuring tool.

6. The rapid measurement device for hollow shaft wall thickness according to claim 2, characterized in that, The second substrate has a guide channel along the first direction, and the first substrate and the guide channel are slidably engaged.

7. The rapid measurement device for hollow shaft wall thickness according to claim 6, characterized in that, The second base includes a first part and a second part, the first part is disposed on the second part, the guide channel is formed between the first part and the second part, the first part and the second part together surround to form the guide channel, and the second extension is disposed on the first part or the second part.

8. The rapid measurement device for hollow shaft wall thickness according to claim 6, characterized in that, The base assembly includes a gripping part with a limiting channel, and one side of the first base passes through the limiting channel and is connected to the gripping part.

9. The rapid measurement device for hollow shaft wall thickness according to claim 8, characterized in that, The base assembly includes a reference portion disposed on the side of the first base away from the grip portion, the second base being slidably disposed between the reference portion and the grip portion, and the measuring end of the measuring instrument being disposed opposite to the reference portion.

10. The rapid measurement device for hollow shaft wall thickness according to any one of claims 1-9, characterized in that, The mounting assembly includes a force-applying part disposed on the second base and protruding from the second base.

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