Run-out testing fixture for internal spline of electrically-driven input shaft of new energy automobile
By designing a new energy vehicle electric drive input shaft internal spline runout inspection fixture, using a measuring lever to contact the ball head and combining it with a precision column bearing and damping device, the problems of cumbersome and low-precision internal spline runout detection in the existing technology are solved, achieving high-precision and low-cost detection results.
Patent Information
- Application Number
- CN202423195574.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In the existing technology, the detection of spline runout in the input shaft is cumbersome, has low measurement accuracy and high cost, and it is difficult to meet the high-precision requirements of the electric drive system of new energy vehicles.
A new energy vehicle electric drive input shaft internal spline runout inspection fixture is designed, which includes a inspection fixture base plate, a measuring lever and a measuring gauge. The measuring lever contacts the ball head of the internal spline, and a precision cylindrical bearing and a damping device are used to improve the measurement accuracy. Combined with a digital micrometer, simple and efficient measurement can be achieved.
It achieves high-precision, low-cost internal spline runout detection, is suitable for large-scale use, is easy to operate, and the measurement accuracy meets the requirements of new energy vehicle electric drive systems.
Smart Images
Figure CN223485093U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of parts inspection tooling technology, specifically to a spline runout inspection tool for the electric drive input shaft of a new energy vehicle. Background Technology
[0002] The electric drive system is the core powertrain of new energy vehicles, and the input shaft, as a crucial component of the electric drive system, typically requires high dimensional accuracy. For example, the electric drive input shaft of a certain product... Figure 1 As shown, the cylindricity and coaxiality requirements at both outer diameters of the input shaft are very high, and the internal spline also has a high runout requirement relative to the outer diameters. Currently, the inspection of the machining quality of the input shaft's internal spline typically involves several methods: visual inspection, which involves visually observing the surface quality, shape, and dimensions of the spline to check for obvious manufacturing defects or damage, while also observing the fit between the spline and the part to ensure compliance with design requirements; and measurement inspection, which uses various measuring tools and instruments to measure the key dimensions and angles of the spline and compare them with standard values. However, for the inspection of the internal spline runout of the input shaft, current technology usually uses a standard gauge bar for simple auxiliary measurement, which is cumbersome and has low accuracy. While an internal spline tooth runout meter can be used, this equipment is expensive. Therefore, it is necessary to design an internal spline runout inspection tool that is simple to operate, accurate, and low in cost. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies for detecting spline runout in the input shaft of electric drive systems by providing a spline runout gauge for new energy vehicles. This gauge is not only simple in structure and easy to operate, but also meets the required measurement accuracy. Furthermore, it has low manufacturing costs and is particularly suitable for mass production.
[0004] This utility model is achieved through the following technical solution:
[0005] This utility model provides a spline runout inspection tool for the input shaft of an electric drive vehicle, including a tool base plate, a measuring lever, and a measuring gauge. The tool base plate is provided with a workpiece bracket for supporting the input shaft. The measuring lever is mounted on the tool base plate via a lever support. The measuring gauge is mounted on the tool base plate via a gauge holder. One end of the measuring lever is provided with a ball head adapted to the spline of the input shaft, and the other end is in contact with the gauge head of the measuring gauge.
[0006] In a preferred embodiment of this utility model, the measuring lever and the lever support are rotatably connected by a precision column bearing.
[0007] As a preferred embodiment of this utility model, a support seat is fixedly provided on the lever support, and the two support seats are respectively located on both sides of the rotation center of the measuring lever. A damping device is provided on one of the support seats near the measuring gauge, and the upper end of the damping device is in contact with the lower side of the measuring lever.
[0008] As a preferred embodiment of this utility model, the damping device is a spring damper or a hydraulic damper.
[0009] As a preferred embodiment of this utility model, a limiting device is provided on one of the support seats away from the measuring gauge, and the upper end of the limiting device is used to contact the lower side of the measuring lever.
[0010] As a preferred embodiment of this utility model, the limiting device is a limiting screw connected to the support base.
[0011] As a preferred embodiment of the present invention, the workpiece support includes a first support and a second support arranged at intervals along the same direction, and both the first support and the second support are provided with V-shaped grooves for supporting the outer circles of both ends of the input shaft.
[0012] As a preferred embodiment of this utility model, the second bracket is close to the lever support, and an axial limiting block is provided in the V-groove of the second bracket. The axial limiting block is used to contact the outer cylindrical shoulder of the input shaft to achieve axial limiting.
[0013] As a preferred embodiment of this utility model, the lower side of the gauge base plate is provided with a first support leg and a second support leg, the first support leg and the second support leg having different heights, so that the end of the input shaft near the measuring lever is in a low position after it is placed on the workpiece support.
[0014] As a preferred embodiment of this utility model, the measuring instrument is a digital micrometer.
[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0016] When using this utility model, the input shaft is placed on the workpiece support. The ball head at one end of the measuring lever contacts the spline teeth inside the input shaft, and the other end of the measuring lever contacts the measuring gauge. Thus, the spline runout inside the input shaft is converted into a change in the reading of the measuring gauge through the measuring lever. This fixture not only has a simple overall structure and is easy to operate, but also meets the measurement accuracy requirements. Moreover, it has low manufacturing cost and is especially suitable for mass production. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:
[0018] Figure 1 A schematic diagram of the electric drive input shaft of a certain product;
[0019] Figure 2 This is a perspective view of the spline runout inspection fixture for the electric drive input shaft of a new energy vehicle according to this utility model.
[0020] Figure 3 This is another perspective view of the spline runout inspection fixture for the electric drive input shaft of a new energy vehicle in this utility model;
[0021] Figure 4 This is a cross-sectional view of the spline runout inspection fixture for the electric drive input shaft of a new energy vehicle in this utility model.
[0022] Figure 5 This is a schematic diagram of the ball head at the end of the measuring lever in this utility model.
[0023] The attached diagram shows the markings and corresponding component names:
[0024] 1-Inspection fixture base plate, 11-First bracket, 12-Second bracket, 13-First support leg, 14-Second support leg, 2-Measuring lever, 21-Ball head, 3-Measuring gauge, 4-Lever support, 5-Gazette holder, 6-Precision column bearing, 7-Support seat, 71-Damping device, 72-Limiting device, 8-Axial limit block, Z-Input shaft. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.
[0028] 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.
[0029] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.
[0030] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.
[0031] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces), unless otherwise explicitly specified.
[0032] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0034] Please refer to Figures 1 to 5 This application provides a spline runout inspection tool for the input shaft of a new energy vehicle electric drive, comprising a tool base plate 1, a measuring lever 2, and a measuring gauge 3. The tool base plate 1 is provided with a workpiece bracket for supporting the input shaft Z. The measuring lever 2 is mounted on the tool base plate 1 via a lever support 4. The measuring gauge 3 is mounted on the tool base plate 1 via a gauge holder 5. One end of the measuring lever 2 is provided with a ball head 21 adapted to the spline of the input shaft Z, and the other end is in contact with the gauge head of the measuring gauge 3.
[0035] When using this gauge, the input shaft Z is placed on the workpiece support. The ball head 21 at one end of the measuring lever 2 contacts the spline teeth inside the input shaft Z, and the other end of the measuring lever 2 contacts the measuring gauge 3. By rotating the input shaft Z, the measurement of different tooth grooves is achieved. In this way, the spline runout inside the input shaft Z is converted into the reading change of the measuring gauge 3 through the measuring lever 2. This gauge not only has a simple overall structure and is easy to operate, but also meets the measurement accuracy requirements. Moreover, it has low manufacturing cost and is especially suitable for mass production.
[0036] According to some embodiments of this application, the measuring lever 2 and the lever support 4 are rotatably connected by a precision column bearing 6. Since the measuring lever 2 and the lever support 4 are rotatably connected, the movement of one end of the measuring lever 2 is reflected in the reading of the measuring gauge 3. Therefore, the rotational accuracy requirement of the measuring lever 2 is high. In this embodiment, the use of a precision column bearing 6 can well meet the rotational accuracy requirement of the measuring lever 2, thereby improving the measurement accuracy of the gauge.
[0037] According to some embodiments of this application, a support seat 7 is fixedly provided on the lever support 4. Two support seats 7 are respectively located on both sides of the rotation center of the measuring lever 2. A damping device 71 is provided on one of the support seats 7 near the measuring gauge 3. The upper end of the damping device 71 is in contact with the lower side of the measuring lever 2. By providing the damping device 71 at the end of the measuring lever 2 near the measuring gauge 3, the damping device 71 applies a certain lifting force to the measuring lever 2, which can maintain a certain contact force between the ball head 21 at the end of the measuring lever 2 and the spline groove inside the input shaft Z, thereby improving the measurement accuracy of the gauge.
[0038] According to some embodiments of this application, the damping device 71 is a spring damper or a hydraulic damper.
[0039] According to some embodiments of this application, a limiting device 72 is provided on one of the support seats 7 located away from the measuring gauge 3. The upper end of the limiting device 72 is used to contact the lower side of the measuring lever 2. By providing the limiting device 72 on one of the support seats 7 located away from the measuring gauge 3, damage to the measuring gauge 3 can be avoided by the other end of the measuring lever 2 moving excessively upward when it rotates.
[0040] According to some embodiments of this application, the limiting device 72 is a limiting screw connected to the support base 7.
[0041] According to some embodiments of this application, the workpiece support includes a first support 11 and a second support 12 arranged at intervals along the same direction. Both the first support 11 and the second support 12 are provided with V-grooves for supporting the outer diameters of both ends of the input shaft Z. The V-grooves designed on the top of the first support 11 and the second support 12 can support and center the outer diameters of both ends of the input shaft Z.
[0042] According to some embodiments of this application, the second bracket 12 is close to the lever support 4, and an axial limiting block 8 is provided in the V-groove of the second bracket 12. The axial limiting block 8 is used to contact the outer circular shoulder of the input shaft Z to achieve axial limiting. By providing the axial limiting block 8 in the V-groove of the second bracket 12, when the input shaft Z is placed in the V-groove of the first bracket 11 and the second bracket 12, the input shaft Z can be axially limited by contacting the outer circular shoulder of the input shaft Z with the axial limiting block 8. This ensures that the ball head 21 at the end of the measuring lever 2 is as close as possible to the same cross-section of the internal spline during the measurement process, that is, to maintain the uniformity of the measurement position. This is beneficial to improving the reliability of the gauge in measuring the radial runout of the internal spline of the input shaft Z.
[0043] According to some embodiments of this application, the lower side of the fixture base plate 1 is provided with a first support leg 13 and a second support leg 14. The first support leg 13 and the second support leg 14 are at different heights so that the end of the input shaft Z near the measuring lever 2 is in a low position after being placed on the workpiece support. By setting the first support leg 13 and the second support leg 14 at different heights, the fixture base plate 1 can be tilted relative to the horizontal plane, thereby tilting the input shaft Z. This facilitates the sliding of the input shaft Z after placement, and during the measurement process, the outer cylindrical shoulder of the input shaft Z can automatically maintain contact with the axial limiting block 8, making the measurement operation more convenient. Specifically, the height of the first support leg 13 is greater than that of the second support leg 14. The first support leg 13 is closer to the first bracket 11, and the second support leg 14 is closer to the dial indicator 5.
[0044] According to some embodiments of this application, the measuring instrument 3 is a digital dial indicator. In this example, using a digital dial indicator not only improves measurement accuracy but also facilitates reading the measurement data.
[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A spline runout inspection tool for the electric drive input shaft of a new energy vehicle, characterized in that, The fixture includes a base plate, a measuring lever, and a measuring gauge. The base plate is provided with a workpiece support for supporting the input shaft. The measuring lever is mounted on the base plate via a lever support. The measuring gauge is mounted on the base plate via a gauge holder. One end of the measuring lever is provided with a ball head that is adapted to the spline inside the input shaft, and the other end is in contact with the gauge head.
2. The spline runout gauge for the electric drive input shaft of a new energy vehicle according to claim 1, characterized in that, The measuring lever and the lever support are rotatably connected by a precision column bearing.
3. The spline runout gauge for the electric drive input shaft of a new energy vehicle according to claim 1, characterized in that, A support seat is fixedly installed on the lever support. The two support seats are located on both sides of the rotation center of the measuring lever. A damping device is installed on one of the support seats near the measuring gauge. The upper end of the damping device is in contact with the lower side of the measuring lever.
4. The spline runout gauge for the electric drive input shaft of a new energy vehicle according to claim 3, characterized in that, The damping device is a spring damper or a hydraulic damper.
5. The spline runout gauge for the electric drive input shaft of a new energy vehicle according to claim 3, characterized in that, A limiting device is provided on one of the support bases away from the measuring gauge, the upper end of the limiting device being used to contact the lower side of the measuring lever.
6. The spline runout gauge for the electric drive input shaft of a new energy vehicle according to claim 5, characterized in that, The limiting device is a limiting screw connected to the support base.
7. The spline runout gauge for the electric drive input shaft of a new energy vehicle according to claim 1, characterized in that, The workpiece support includes a first support and a second support arranged at intervals along the same direction. Both the first support and the second support are provided with V-grooves for supporting the outer circles at both ends of the input shaft.
8. The spline runout inspection tool for the electric drive input shaft of a new energy vehicle according to claim 7, characterized in that, The second bracket is close to the lever support, and an axial limiting block is provided in the V-groove of the second bracket. The axial limiting block is used to contact the outer circular shoulder of the input shaft to achieve axial limiting.
9. The spline runout inspection tool for the electric drive input shaft of a new energy vehicle according to claim 1, characterized in that, The bottom side of the gauge base plate is provided with a first support leg and a second support leg. The first support leg and the second support leg are at different heights so that the end of the input shaft near the measuring lever is in a low position after it is placed on the workpiece support.
10. The spline runout inspection tool for the electric drive input shaft of a new energy vehicle according to claim 1, characterized in that, The measuring instrument is a digital dial indicator.