Universal joint internal star wheel system plane height measuring tool
By designing a plane height measuring tool for the internal star wheel system of the universal joint, and using double jaw clamping and dial indicator measurement, the problems of slow inspection speed and high cost of coordinate measuring machine are solved, realizing fast and accurate measurement, which is suitable for mass production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI CHANGRUI AUTO PARTS
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-03
AI Technical Summary
Existing methods for measuring the plane height of the internal star wheel system of a universal joint using a coordinate measuring machine require highly skilled personnel, are slow, have high equipment costs, and are subject to strict environmental requirements, making them unsuitable for the rapid measurement needs of mass production.
A plane height measuring tool for the internal star wheel system of a universal joint was designed. It uses double jaws to clamp two sets of ball tracks opposite each other in the internal star wheel of the universal joint, and combines a dial indicator for measurement. It utilizes a handle operation and an automatic clamping mechanism with a compression spring to reduce the skill requirements of the operator, simplify the structure, and make it suitable for production sites.
It enables rapid and accurate measurement of the plane height of the universal joint internal star wheel system, reduces equipment and maintenance costs, is suitable for mass production, simplifies the operation process, and meets the testing needs of the production site.
Smart Images
Figure CN224455625U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of machining and measurement technology, and in particular to a plane height measuring tool for a universal joint internal star wheel system. Background Technology
[0002] Universal joints are an important component of automotive transmission systems, with telescopic ball cage constant velocity universal joints (VL type) being the most widely used. The inner star wheel of this universal joint is one of its key components. The inner star wheel is connected to the drive shaft via an internal spline, and its outer surface has eight cylindrical grooves forming an inner ball track. The centerlines of these ball tracks are not parallel to the axis, but are inclined at the same angle relative to the axis. Furthermore, adjacent ball tracks on the same component have opposite inclination directions, forming a "V" shape.
[0003] When a universal joint is in operation, power is output from the drive shaft via the inner star wheel, steel balls, and outer star wheel. During torque transmission, the inner and outer star wheels achieve axial relative movement through the rolling of the steel balls along the inner and outer ball tracks, eliminating the need for sliding splines required in other universal joint transmission devices. Compared to sliding splines, it has lower rolling resistance, higher transmission efficiency, and a simpler structure. The system plane height of the inner star wheel in a universal joint is an important geometric parameter that directly affects the assembly accuracy and transmission performance of the universal joint. This parameter is typically milled on a dedicated ball track milling machine, and precise measurement and inspection are required after machining to ensure product quality.
[0004] Existing measurement methods generally use coordinate measuring machines (CMMs) for inspection, but this method has obvious drawbacks: First, it requires highly skilled inspectors who are proficient in operating and programming CMMs; second, the inspection speed is slow, with a long measurement time for a single workpiece, which cannot meet the rapid inspection needs of mass production; third, the equipment cost is high, as CMMs are expensive and maintenance costs are also high; and finally, it has strict environmental requirements, requiring a constant temperature and humidity metrology room environment, which is not suitable for rapid measurement applications in production site environments. Utility Model Content
[0005] The purpose of this application is to provide a tool for measuring the plane height of the star wheel system inside a universal joint, which can quickly measure the plane height of the star wheel system inside the universal joint, reduce the skill requirements of the testing personnel, simplify the measurement structure, and reduce equipment costs.
[0006] To achieve the above objectives, this application adopts the following technical solution.
[0007] This application provides a universal joint internal star wheel system plane height measuring tool for measuring the system plane height of the universal joint internal star wheel. The universal joint internal star wheel system plane height measuring tool includes a base plate, a clamping assembly, a support assembly, and a measuring assembly. The clamping assembly is disposed on the base plate and includes a first jaw and a second jaw. The first jaw and the second jaw are used to simultaneously clamp two sets of opposite ball tracks of the universal joint internal star wheel for positioning. The support assembly is disposed on the base plate and is used to provide pre-position support for the universal joint internal star wheel. The measuring assembly is disposed on the base plate and includes a dial indicator. The dial indicator is used to contact the end face of the universal joint internal star wheel to measure the system plane height.
[0008] In some possible implementations, the clamping assembly further includes a shim block, a guide rail, and a guide rail slider. The shim block is fixed to the base plate, the first claw is fixed to the shim block, the guide rail is fixed to the base plate, the guide rail slider is slidably connected to the guide rail, and the second claw is fixed to the guide rail slider.
[0009] In some possible implementations, the clamping assembly further includes a first handle rod, a second handle rod, a first handle, and a second handle, wherein the first handle rod is connected to the raised block, the first handle is connected to the first handle rod, the second handle rod is connected to the guide rail slider, and the second handle is connected to the second handle rod.
[0010] In some possible implementations, the clamping assembly further includes a guide post, a first compression spring, and a guide rail locking block. The guide post is fixed to the guide rail slider, the first compression spring is sleeved on the guide post, and the guide rail locking block is fixed to the guide rail slider. The first compression spring gives the guide rail slider an elastic force that moves toward the first jaw.
[0011] In some possible implementations, the base plate is provided with a spring support block, and one end of the first compression spring contacts the spring support block.
[0012] In some possible implementations, the first claw is fixed to the shim block by means of a pin positioning screw, and the second claw is fixed to the guide rail slider by means of a pin positioning screw.
[0013] In some possible implementations, the support assembly includes a component support base, a second compression spring, and a component support column. The component support base is fixed to the base plate, the second compression spring is disposed within the component support base, and the component support column is movably connected to the component support base. The second compression spring provides an upward supporting force for pre-positioning the star wheel inside the universal joint.
[0014] In some possible implementations, the lower end of the part support column is a cylindrical structure that fits with the inner hole of the part support seat with clearance. A nut is provided below the base plate, and the bottom of the part support column is provided with an internal thread. The extension height of the part support column relative to the part support seat is adjusted by a screw passing through the nut from below the base plate and engaging with the internal thread.
[0015] In some possible implementations, the measuring assembly further includes a cross slide, a slide connecting plate, a dial indicator seat, and a universal dial indicator rod. The cross slide is fixed to the base plate, the slide connecting plate is connected to the cross slide, the dial indicator seat is fixed to the slide connecting plate, the universal dial indicator rod is connected to the dial indicator seat, and the dial indicator is fixed to the universal dial indicator rod.
[0016] In some possible implementations, the base plate is provided with leveling screws for adjusting the levelness of the star wheel height gauge inside the universal joint.
[0017] In summary, the beneficial effects of this application are as follows: The universal joint internal star wheel height measuring tool provided by this application uses two jaws to clamp the two sets of ball tracks opposite each other in the universal joint internal star wheel for positioning, and uses a dial indicator to contact the end face to measure the system plane height. The manual adjustment steps are reduced by the handle operation and the automatic clamping mechanism of the compression spring, which lowers the skill requirements of the inspection personnel. Compared with a coordinate measuring machine, it shortens the inspection time of a single workpiece, is suitable for the rapid inspection needs of mass production, has a relatively simple structure and low environmental requirements, and can be used directly on the production site without the need for a special metrology room. The equipment manufacturing cost and maintenance cost are lower than those of a coordinate measuring machine. At the same time, the positioning accuracy of the jaws is ensured by the pin positioning screw locking method, the support assembly realizes pre-positioning, and the cross slide realizes multi-point measurement. The measurement accuracy can meet the quality inspection requirements of the automotive universal joint internal star wheel. Moreover, the guide rail sliding mechanism and the support column height adjustment mechanism enable the measuring tool to adapt to the measurement needs of universal joint internal star wheels of different specifications. 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 star wheel structure inside the universal joint.
[0020] Figure 2 This is a side view of the star wheel inside the universal joint.
[0021] Figure 3This is a cross-sectional view of the star wheel inside the universal joint.
[0022] Figure 4 This is a three-dimensional schematic diagram of the plane height measuring tool for the star wheel system inside the universal joint in this application.
[0023] Figure 5 This is a structural schematic diagram of the plane height measuring tool for the internal star wheel system of the universal joint in this application from another angle.
[0024] Figure 6 This is a top view of the plane height measuring tool for the internal star wheel system of the universal joint in this application.
[0025] Figure 7 This is a schematic diagram of the star wheel structure and measurement position inside the universal joint.
[0026] Figure 8 This is a schematic diagram illustrating the principle of measuring the plane height of the star wheel system inside the universal joint.
[0027] Explanation of key figure labels:
[0028] Universal joint inner star wheel 1, base bolt 2
[0029] Base plate 3, shims 4
[0030] First handle lever 5, first chuck 6.
[0031] First handle 7, dial indicator 8.
[0032] Second chuck 9, second handle 10
[0033] Second handle lever 11, guide rail slider 12
[0034] Guide rail locking block 13, first compression spring 14
[0035] Guide rail 15, spring support block 16,
[0036] Guide post 17, second compression spring 18,
[0037] Part support column 19, part support base 20
[0038] Cross slide 21, slide connecting plate 22,
[0039] 23, gauge rod holder; 24, universal gauge rod.
[0040] Nut 31, screw 32. Detailed Implementation
[0041] The technical solutions in 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 in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" can refer to the actual direction of the device in use or operation, the direction of the drawing in the accompanying drawings, or two opposite directions; while "inner" and "outer" refer to the outline of the device.
[0042] The inner star wheel 1 of the universal joint is the core component of the telescopic ball cage constant velocity universal joint, such as... Figure 1 , Figure 2 As shown, in this embodiment, its outer surface has eight cylindrical grooves forming an inner ball channel, such as... Figure 3 As shown, the centerlines of these lanes are inclined at a certain angle relative to the longitudinal axis of the inner star wheel, and adjacent lanes are inclined in opposite directions, forming a "V" shape. The inner star wheel is connected to the drive shaft via an internal spline, realizing the power transmission function during the operation of the universal joint. The system plane height of the inner star wheel in the universal joint refers to the key dimensional parameter of the inner star wheel in the universal joint assembly system. Specifically, it refers to the axial positioning dimension from the end face of the inner star wheel to the assembly reference plane of the universal joint. This parameter is called "system plane height" because although the eight lanes on the outer surface of the inner star wheel are inclined in a "V" shape, the spatial layout of these lanes is designed based on a common system reference plane. This reference plane determines the precise axial and radial fit between the inner star wheel, the outer star wheel, and the steel balls. When the universal joint performs axial extension and retraction, the distance from the end face of the inner star wheel to the system reference plane directly affects the movement trajectory and contact state of the steel balls in each lane, thus affecting the smoothness of the entire transmission system. The accuracy of the system plane height is directly related to the assembly accuracy, transmission performance and service life of the universal joint. If this parameter exceeds the tolerance range, it will lead to problems such as unstable transmission of the universal joint, increased noise and accelerated wear. Therefore, it is necessary to measure and control it accurately.
[0043] Please see Figures 1 to 8 As shown, where Figures 1 to 3 The structural features of the star wheel inside the universal joint are shown. Figure 7 The three-dimensional structure of the inner star wheel and key measurement locations are shown. Figure 8 This is a schematic diagram illustrating the principle of measuring the plane height of the star wheel system inside the universal joint. Figures 4 to 6This application illustrates a universal joint internal star wheel system plane height measuring tool according to an embodiment of the present application. This embodiment provides a universal joint internal star wheel system plane height measuring tool (hereinafter referred to as the tool) for measuring the system plane height of the internal star wheel 1 of the universal joint. The universal joint internal star wheel system plane height measuring tool includes a base plate 3, a clamping assembly, a support assembly, and a measuring assembly. The clamping assembly is disposed on the base plate 3 and includes a first jaw 6 and a second jaw 9. The first jaw 6 and the second jaw 9 are used to simultaneously clamp two opposing sets of ball tracks of the internal star wheel 1 of the universal joint for positioning. The symmetrical clamping method of the double jaws ensures the positional stability and positioning accuracy of the internal star wheel 1 of the universal joint during the measurement process. The support assembly is disposed on the base plate 3 and is used to provide pre-positioning support for the internal star wheel 1 of the universal joint, preventing the workpiece from shifting position during the clamping process. The measuring assembly is disposed on the base plate 3 and includes a dial indicator 8, which is used to contact the end face of the internal star wheel 1 of the universal joint to measure the system plane height. The flatness of the inner star wheel 1 end face is evaluated by measuring its height at different positions. End face flatness reflects the machining accuracy and smoothness of the end face, and is a crucial indicator of the inner star wheel's machining quality. Measuring the end face flatness reflects the accuracy of the system's planar height. In this measurement method, the upper surface of the first jaw 6 serves as a simulated reference for the universal joint assembly reference surface. Since the first jaw clamps and positions the inner star wheel relative to the ball track, its upper surface accurately simulates the actual assembly reference position of the inner star wheel in the universal joint. Therefore, measuring the distance from the inner star wheel end face to the upper surface of the first jaw effectively reflects the system's planar height parameter.
[0044] This application uses the universal joint inner star wheel (8 lanes) as an example for detailed description, but it is not limited to this. The measurement principle of this measuring tool is to position and measure the end face height by clamping the two sets of opposite lanes of the universal joint inner star wheel. Theoretically, this measurement principle is applicable to universal joint inner star wheels with other numbers of lanes, such as 6-lane, 10-lane, and other different specifications of inner star wheels. As long as the universal joint inner star wheel has a relative lane structure and the center line of the lane is inclined relative to the axis, and the inclination direction of adjacent lanes is opposite, this measuring tool can be used to measure the system plane height.
[0045] like Figure 4 and Figure 5As shown, in one specific embodiment, the clamping assembly may further include a shim block 4, a guide rail 15, and a guide rail slider 12. The shim block 4 is fixed to the base plate 3 by a pin-locating screw. The first jaw 6 is fixed to the shim block 4 by a pin-locating screw, ensuring the positional accuracy and repeatability of the first jaw 6. The guide rail 15 is fixed to the base plate 3 by a pin-locating screw, and the guide rail slider 12 is slidably connected to the guide rail 15. The second jaw 9 is fixed to the guide rail slider 12 by a pin-locating screw. The sliding of the guide rail slider 12 on the guide rail 15 allows the second jaw 9 to move linearly relative to the first jaw 6, adapting to the clamping requirements of the universal joint inner star wheel 1 of different sizes.
[0046] In one specific embodiment, the clamping assembly may further include a first handle rod 5, a second handle rod 11, a first handle 7, and a second handle 10. The first handle rod 5 is connected to the raising block 4 by screw locking, the first handle 7 is connected to the first handle rod 5 by screw locking, the second handle rod 11 is connected to the guide rail slider 12 by screw locking, and the second handle 10 is connected to the second handle rod 11 by screw locking. The handle operating mechanism reduces the skill requirements of the operator, making the measurement process more convenient and standardized.
[0047] In one specific embodiment, the clamping assembly further includes a guide post 17, a first compression spring 14, and a guide rail locking block 13. The guide post 17 is fixed to the guide rail slider 12 by screws. The first compression spring 14 is sleeved on the guide post 17 and is positioned and limited by the spring support block 16. The guide rail locking block 13 is screwed onto the guide rail slider 12, serving as a non-adjustable limiting mechanism to ensure that the guide rail slider 12 does not detach from the guide rail 15 when sliding on it. The first compression spring 14 provides the guide rail slider 12 with an elastic force that moves towards the first jaw 6. Under the action of the first compression spring 14, the guide rail slider 12 can move on the guide rail 15, achieving an automatic clamping function. After the operator releases the first handle 7 and the second handle 10, the first compression spring 14 pushes the guide rail slider 12 towards the first jaw 6, automatically clamping the universal joint inner star wheel 1, improving the stability and consistency of the clamping.
[0048] In one specific embodiment, a spring support block 16 is provided on the base plate 3 by means of screw locking. One end of the first compression spring 14 is in contact with the spring support block 16. The spring support block 16 provides stable support for the first compression spring 14, ensuring that the compression spring is subjected to uniform force and stable movement during operation, and avoiding uneven clamping force caused by unstable support.
[0049] like Figure 5As shown, in one specific embodiment, the support assembly includes a part support base 20, a second compression spring 18, and a part support column 19. The part support base 20 is fixed to the base plate 3 by screws. The second compression spring 18 is disposed within the part support base 20. The part support column 19 is movably connected to the part support base 20. The second compression spring 18 provides an upward supporting force for pre-positioning the star wheel 1 within the universal joint. When the star wheel 1 within the universal joint is placed on the measuring tool, it automatically performs preliminary positioning, reducing the workload of manual adjustment and improving positioning accuracy.
[0050] In one specific embodiment, the lower end of the component support column 19 is a cylindrical structure, which is clearance-fitted with the inner hole of the component support seat 20 to ensure that the component support column 19 can slide smoothly up and down within the component support seat 20. A nut 31 is provided below the base plate 3, and the bottom of the component support column 19 is provided with an internal thread (not shown in the figure). By using a screw 32 to pass through the nut 31 from below the base plate and engage with the internal thread, the lowest position of the component support column 19 relative to the component support seat 20 can be adjusted, thereby controlling the extension height range of the component support column 19. By adjusting the extension height of the component support column 19, the component support column 19 can be pre-positioned for the universal joint inner star wheel 1 at different heights, providing convenience for the first chuck 6 and the second chuck 9 to clamp the universal joint inner star wheel 1.
[0051] like Figure 4 and Figure 6 As shown, in one specific embodiment, the measuring assembly further includes a cross slide 21, a slide connecting plate 22, a dial indicator seat 23, and a universal dial indicator rod 24. The cross slide 21 is a standard component, fixed to the base plate 3 by screws. The cross slide 21 itself has two-dimensional sliding functions along the X and Y axes. The slide connecting plate 22 is connected to the sliding portion of the cross slide 21. The dial indicator seat 23 is fixed to the slide connecting plate 22. The universal dial indicator rod 24 is a standard component, connected to the dial indicator seat 23. The universal dial indicator rod 24 has a universal adjustment function, and the dial indicator 8 is fixed to the universal dial indicator rod 24. By operating the cross slide 21, the two-dimensional movement of the dial indicator 8 is achieved, enabling multi-point measurement of the end face of the star wheel 1 within the universal joint, improving the comprehensiveness and accuracy of the measurement.
[0052] In one specific embodiment, four leveling screws 2 are threaded onto the base plate 3. These leveling screws 2 are used to adjust the levelness of the star wheel height gauge within the universal joint. By adjusting the height of the leveling screws, the gauge can be kept level in different operating environments, providing a fundamental guarantee for accurate measurement.
[0053] This application also provides a method for measuring the plane height of a universal joint internal star wheel system, such as... Figure 7 and Figure 8As shown, this measurement method is based on the aforementioned universal joint internal star wheel system plane height measuring tool. Its measurement principle is to establish the upper surface of the first jaw 6 as the measurement reference plane, and obtain the height difference by measuring the height of the reference plane and the end face of the universal joint internal star wheel 1 using a dial indicator 8, thereby determining the system plane height. To facilitate understanding of the measurement process, the relevant measurement parameters are defined as follows: Reference plane measurement reading A is the value when the dial indicator contacts the upper surface of the first jaw 6; end face measurement reading B is the value when the dial indicator contacts the end face of the universal joint internal star wheel 1. The measurement principle is as follows: Figure 8 As shown, the system plane height can be obtained by calculating the difference (BA) between the two readings.
[0054] The specific measurement process includes the following steps:
[0055] First, the operator holds the first handle 7 and the second handle 10 with one hand, and overcomes the elastic force of the first compression spring 14 by operating the handles, pushing the guide rail slider 12 to slide along the guide rail 15, so that the second pawl 9 moves away from the first pawl 6, thereby separating the two pawls and providing enough space for placing the universal joint inner star wheel 1.
[0056] Then, the star wheel 1 inside the universal joint is placed into the measuring tool, and the part support column 19 automatically contacts the star wheel 1 inside the universal joint under the action of the second compression spring 18, thus achieving preliminary pre-positioning support.
[0057] like Figure 4 and Figure 5 As shown, the first handle 7 and the second handle 10 are then released. The rebound force of the first compression spring 14 pushes the guide rail slider 12, causing the second pawl 9 to close to the first pawl 6. The cylindrical contact surfaces of the two pawls precisely contact and fit with the two sets of cylindrical ball tracks opposite to the star wheel 1 inside the universal joint, achieving stable clamping and positioning, and completing the clamping and positioning of the star wheel 1 inside the universal joint.
[0058] Then, by sliding the cross slide 21, the dial indicator 8 is brought into contact with the upper surface of the first jaw 6. At this time, the dial indicator 8 displays the first measurement reading, which is recorded as the reference surface measurement reading A.
[0059] By sliding the cross slide 21 again, the dial indicator 8 is brought into contact with the end face of the star wheel 1 inside the universal joint. At this time, the dial indicator 8 displays the second measurement reading, which is recorded as the end face measurement reading B.
[0060] The difference (BA) between the two readings is calculated to obtain the actual system plane height of the star wheel 1 inside the universal joint. If the difference (BA) is within the design tolerance range of ±0.05mm, it indicates that the system plane height of the star wheel 1 inside the universal joint is qualified. If it exceeds the tolerance range, the star wheel 1 inside the universal joint needs to be reworked. Simultaneously, by moving the cross slide, the dial indicator performs multiple measurements at different positions on the end face. The obtained multiple readings can assess the flatness of the end face. This measurement method can quickly and accurately determine whether the system plane height of the star wheel 1 inside the universal joint meets the design requirements. Compared with the traditional coordinate measuring machine method, it significantly improves inspection efficiency, reduces the skill requirements of the inspection personnel, and ensures that the measurement accuracy meets the needs of production quality control.
[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0062] The technical solutions provided by the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A gage for measuring the system flatness of a cardan inner race, characterized in that, The universal joint internal star wheel system plane height measuring tool includes a base plate, a clamping assembly, a support assembly, and a measuring assembly. The clamping assembly is disposed on the base plate and includes a first jaw and a second jaw. The first jaw and the second jaw are used to simultaneously clamp two sets of ball tracks opposite each other in the universal joint for positioning. The support assembly is disposed on the base plate and is used to provide pre-position support for the universal joint internal star wheel. The measuring assembly is disposed on the base plate and includes a dial indicator. The dial indicator is used to contact the end face of the universal joint internal star wheel to measure the system plane height.
2. The gimbaling inner star system flat height gauge of claim 1, wherein, The clamping assembly further includes a shim block, a guide rail, and a guide rail slider. The shim block is fixed on the base plate, the first claw is fixed on the shim block, the guide rail is fixed on the base plate, the guide rail slider is slidably connected to the guide rail, and the second claw is fixed on the guide rail slider.
3. The gimbaling inner star system flat height gauge of claim 2, wherein, The clamping assembly further includes a first handle rod, a second handle rod, a first handle, and a second handle. The first handle rod is connected to the raised block, the first handle is connected to the first handle rod, the second handle rod is connected to the guide rail slider, and the second handle is connected to the second handle rod.
4. The gimbaling inner star system flat height gauge of claim 2, wherein, The clamping assembly further includes a guide post, a first compression spring, and a guide rail locking block. The guide post is fixed on the guide rail slider, the first compression spring is sleeved on the guide post, and the guide rail locking block is fixed on the guide rail slider. The first compression spring gives the guide rail slider an elastic force that moves toward the first jaw.
5. The gimbaling inner star system flat height gauge of claim 4 wherein, The base plate is provided with a spring support block, and one end of the first compression spring is in contact with the spring support block.
6. The gimbaling inner star system flat height gauge of claim 2 wherein, The first claw is fixed to the shim block by means of a pin positioning screw, and the second claw is fixed to the guide rail slider by means of a pin positioning screw.
7. The gimbaling inner star system flat height gauge of claim 1 wherein, The support assembly includes a component support base, a second compression spring, and a component support column. The component support base is fixed to the base plate, the second compression spring is disposed inside the component support base, and the component support column is movably connected to the component support base. The second compression spring provides an upward supporting force for pre-positioning the star wheel inside the universal joint.
8. The gimbaling inner star system flat height gauge of claim 7, wherein, The lower end of the component support column is a cylindrical structure that fits with the inner hole of the component support seat with clearance. A nut is provided below the base plate, and the bottom of the component support column is provided with internal threads. The extension height of the component support column relative to the component support seat is adjusted by a screw passing through the nut from below the base plate and engaging with the internal threads.
9. The gimbaling inner star system flat height gauge of claim 1 wherein, The measuring assembly also includes a cross slide, a slide connecting plate, a dial indicator seat, and a universal dial indicator rod. The cross slide is fixed to the base plate, the slide connecting plate is connected to the cross slide, the dial indicator seat is fixed to the slide connecting plate, the universal dial indicator rod is connected to the dial indicator seat, and the dial indicator is fixed to the universal dial indicator rod.
10. The gimbaling inner star system flat height gauge of claim 1 wherein, The base plate is provided with foot screws, which are used to adjust the levelness of the star wheel height gauge inside the universal joint.