A device for measuring the difference in diameter of an outer ball cage

Abstract

The utility model discloses an outer cage ball track diameter's range measuring device belongs to high accuracy detection technical field, including work table, work table top is equipped with mounting device, and work table and mounting device all are penetrated with taper shaft, and the outer ring of taper shaft is evenly arranged at least three movable ball, and mounting device includes base and ring shell, and base and ring shell all are fixed with the mounting panel of position adjustable, and the mounting panel is used for with movable ball sliding connection, taper shaft bottom fixedly connected with lift cylinder, and lift cylinder is used for driving taper shaft to carry out axial displacement, and work table bottom is fixed with measuring table through mounting bracket, and the outer ring of taper shaft is fixed with the lower pressing plate, and the measuring end of lower pressing plate and measuring table is contacted. The utility model can enhance the adaptability and flexibility of measuring device, makes the accurate controllable of measuring process.

Description

Technical Field

[0001] This utility model relates to the field of high-precision detection technology, and in particular to a range measurement device for the diameter of the outer ball cage track. Background Technology

[0002] The ball-cage universal joint is a key component in automotive transmission systems and other fields. It mainly consists of a star-shaped sleeve (inner raceway), an outer ball cage (outer raceway), steel balls, and a cage. The star-shaped sleeve is connected to the drive shaft via a spline, and its outer surface has several arc-shaped grooved raceways. The inner surface of the outer ball cage also has corresponding arc-shaped grooved raceways. Several steel balls are respectively installed in the grooves of the inner and outer raceways and held in the same plane by the cage, thereby transmitting power and forming a constant velocity universal joint. The diameter and consistency of the ball raceways within the outer ball cage are key geometric parameters affecting the performance and lifespan of the universal joint, therefore, they need to be measured accurately.

[0003] Currently, the market mainly offers the following methods for testing the diameter and range of the outer ball cage's lane:

[0004] Firstly, there is the manual measurement method. This method usually requires operators to use general measuring tools or special gauges to measure multiple lanes one by one. After all the relevant lanes have been measured, the diameter and range of the lanes are calculated manually. This manual measurement method is not only inconvenient to operate and consumes a lot of manpower and time, but also the accuracy and consistency of the measurement results are easily affected by human factors and are difficult to guarantee.

[0005] Secondly, there are automatic measurement methods, such as using precision measuring equipment like coordinate measuring machines (CMMs) to measure parts. While CMMs can provide high-precision measurement results, their drawbacks are also quite obvious: First, it is usually necessary to import or reconstruct the entire 3D model of the part into the system and write the corresponding measurement program before measurement; second, the measurement process is relatively time-consuming, the equipment is expensive, and operation and maintenance require professional personnel. Therefore, this type of automatic measurement method is difficult to meet the needs of rapid and comprehensive inspection of large batches of parts on the production site. Utility Model Content

[0006] The purpose of this invention is to enhance the adaptability and flexibility of the measuring device, and to make the measuring process precise and controllable.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a range measuring device for the diameter of the outer ball cage channel, comprising a workbench, an installation device on the top of the workbench, a conical shaft passing through both the workbench and the installation device, at least three movable balls evenly arranged on the outer ring of the conical shaft, the installation device comprising a base and an annular shell, both the base and the annular shell being fixed with an adjustable mounting plate, the mounting plate being used for sliding connection with the movable balls;

[0008] A lifting cylinder is fixedly connected to the bottom of the tapered shaft. The lifting cylinder is used to drive the tapered shaft to make axial displacement. A measuring gauge is fixed to the bottom of the worktable by a mounting bracket. A lower pressure plate is fixed to the outer ring of the tapered shaft. The lower pressure plate is in contact with the measuring end of the measuring gauge.

[0009] As a further description of the above technical solution: the conical shaft consists of a conical truncated platform with an upper diameter larger than the lower diameter and a shaft rod fixed to the bottom of the conical truncated platform and extending downward. The shaft rod slides through the base and the worktable and is fixedly connected to the output end of the lifting cylinder.

[0010] As a further description of the above technical solution: an L-shaped rod is fixed to the bottom of the workbench, and the surface of the L-shaped rod is fixedly connected to the lifting cylinder by bolts.

[0011] As a further description of the above technical solution: the base and the annular shell of the mounting device are provided with a number of identical first mounting holes, and each mounting plate is provided with a second mounting hole that matches the first mounting hole at its corresponding position.

[0012] As a further description of the above technical solution: both the base and the annular shell are provided with screws corresponding to the number of mounting plates. The screws pass through the first mounting hole and the second mounting hole in sequence, thereby fixing the mounting plates to the base and the annular shell.

[0013] As a further description of the above technical solution: T-shaped grooves are provided at both the upper and lower ends of the movable ball, and T-shaped blocks that slide in cooperation with the T-shaped grooves are provided on the mounting plate. The movable ball slides radially along the mounting plate and abuts against the inner ball lane of the outer ball cage to be tested.

[0014] As a further description of the above technical solution: the T-shaped block and the T-shaped groove adopt a clearance fit to compensate for changes caused by thermal expansion and oil stains.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] 1. The output end of the lifting cylinder is fixedly connected to the shaft of the cone shaft, realizing direct drive of the axial displacement of the cone shaft. Compared with the method of falling by gravity, the direct drive of the cylinder can provide more accurate and stable driving force and more controllable movement speed, which helps to improve the repeatability and consistency of the measurement process.

[0017] 2. By setting an adjustable mounting plate and adjusting the installation position and number of movable balls via screws, this device can adapt to the measurement needs of outer ball cages with different specifications, numbers of ball lanes, or different ball lane distributions, significantly improving the versatility and flexibility of the device and reducing the cost of replacing or modifying measuring equipment due to changes in product specifications.

[0018] 3. By converting the radial dimension, which is difficult to measure directly, into an easily measurable axial displacement through the structure of the conical shaft and the movable ball, and quickly reading it out through the measuring instrument, the conical platform ensures that the movable ball makes uniform contact with the ball track to be measured during the measurement process, simplifying the operation and improving the measurement efficiency. This efficient measurement method is suitable for quality inspection of large batches of outer ball cage products on the production line. It can provide timely feedback on processing data, help adjust production process parameters, thereby effectively controlling and improving product quality, while saving a lot of manpower and time costs. Attached Figure Description

[0019] Figure 1 A front view of the present invention is shown;

[0020] Figure 2 A cross-sectional view of the mounting device of this utility model is shown;

[0021] Figure 3 An exploded view of the installation device of this utility model is shown;

[0022] Figure 4 A perspective view of the movable ball and mounting plate of this utility model is shown.

[0023] Legend:

[0024] 10. Workbench; 11. Conical shaft; 111. Conical platform; 112. Shaft; 12. Moving ball; 121. T-slot; 13. Base; 14. Annular shell; 15. Mounting plate; 151. T-block; 16. Lifting cylinder; 17. Mounting bracket; 18. Measuring gauge; 19. Lower pressure plate; 20. L-shaped rod; 21. Screw. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 This utility model provides a technical solution: a range measuring device for the diameter of the outer ball cage channel, including a workbench 10 and a conical shaft 11, with an installation device installed on the top of the workbench 10, the installation device being used to accommodate and guide the moving ball 12.

[0027] The tapered shaft 11 is vertically arranged and passes through the worktable 10 and the mounting device. The tapered shaft 11 is used to realize the conversion of radial dimension to axial dimension. The tapered shaft 11 includes a tapered platform 111 with an upper diameter larger than the lower diameter and a shaft 112 fixed to the bottom of the tapered platform 111 and extending downward. The shaft 112 can slide through the mounting device and the worktable 10.

[0028] Furthermore, in order to drive the axial displacement of the tapered shaft 11, a lifting cylinder 16 is provided at the bottom of the tapered shaft 11. The output end of the lifting cylinder 16 is fixedly connected to the shaft 112 of the tapered shaft 11. The lifting cylinder 16 itself is fixed to the bottom of the worktable 10 by an L-shaped rod 20. The surface of the L-shaped rod 20 is connected to the lifting cylinder 16 by bolts, ensuring the stability of the drive mechanism.

[0029] The output end of the lifting cylinder 16 is fixedly connected to the shaft 112 of the conical shaft 11, realizing direct drive of the axial displacement of the conical shaft 11. Compared with the method of falling by gravity, the direct drive of the cylinder can provide more accurate and stable driving force and more controllable movement speed, which helps to improve the repeatability and consistency of the measurement process.

[0030] Furthermore, at least three movable balls 12 are evenly arranged on the outer ring of the conical shaft 11. These movable balls 12 are measuring elements that directly contact the ball track inside the outer ball cage to be measured. The mounting device includes a base 13 and an annular shell 14. Between the base 13 and the annular shell 14, a mounting plate 15 that can be adjusted in position is fixed. The mounting plate 15 is a support and guide component for the movable balls 12. The movable balls 12 achieve radial movement through a sliding connection with the mounting plate 15.

[0031] Specifically, in order to fix and adjust the position of the mounting plate 15, the base 13 and the annular shell 14 of the mounting device are provided with a number of identical first mounting holes, and each mounting plate 15 is provided with a second mounting hole that matches the first mounting hole at its corresponding position.

[0032] By passing the screws 21 sequentially through the corresponding first and second mounting holes, the mounting plate 15 can be firmly fixed to the base 13 and the annular shell 14. The operator can adjust the installation position of the movable ball 12 and adjust the number of movable balls 12 as needed by adjusting and adding these screws 21 and mounting plates 15.

[0033] By setting an adjustable mounting plate 15 and adjusting the installation position and number of movable balls 12 via screws 21, this device can adapt to the measurement needs of outer ball cages with different specifications, different numbers of ball lanes, or different ball lane distributions, significantly improving the versatility and flexibility of the device and reducing the cost of replacing or modifying measuring equipment due to changes in product specifications.

[0034] Furthermore, the movable ball 12 is slidably connected to the mounting plate 15. Specifically, both the upper and lower ends of the movable ball 12 are provided with T-shaped grooves 121, and the mounting plate 15 is provided with T-shaped blocks 151 that slide in conjunction with the T-shaped grooves 121. The cooperation between the T-shaped grooves 121 and the T-shaped blocks 151 ensures that the movable ball 12 can slide only along the mounting plate 15 in its radial direction and abut against the inner ball track of the outer ball cage to be measured. The T-shaped blocks 151 and the T-shaped grooves 121 are clearance-fitted. This design can effectively compensate for the thermal expansion caused by temperature changes and the influence of potential oil stains on the sliding performance, ensuring the smoothness and accuracy of the measurement process.

[0035] The movable ball 12 slides with the T-shaped blocks 151 on the mounting plate 15 through the T-shaped grooves 121 at its upper and lower ends. This guiding method provides precise guidance for the radial movement of the movable ball 12. The T-shaped blocks 151 and the T-shaped grooves 121 are fitted with clearance. This design can effectively compensate for thermal expansion caused by changes in ambient temperature, as well as the influence of oil on the movement of moving parts in actual use. This ensures the stability and reliability of measurements in industrial environments such as workshops and improves the accuracy of measurement results.

[0036] Furthermore, a measuring instrument 18, such as a dial indicator, micrometer, or electronic displacement sensor, is fixedly mounted on the bottom of the workbench 10 via a mounting bracket 17. At the same time, a lower pressure plate 19 is fixed on the outer ring of the tapered shaft 11. When the lower pressure plate 19 moves axially with the tapered shaft 11, its bottom surface will contact the measuring end of the measuring instrument 18, so that the measuring instrument 18 can accurately detect the axial displacement of the tapered shaft 11.

[0037] The measuring instrument 18 can be a BOSI BS153610 dial gauge or a Japanese Citizen 3M-100 high-precision pointer gauge. Alternatively, other contact displacement sensors with higher precision can be selected according to actual needs.

[0038] By converting the radial dimension (ball track diameter), which is difficult to measure directly, into an easily measurable axial displacement through the structure of the conical shaft 11 and the movable ball 12, and quickly reading it through the measuring table 18, the conical platform 111 enables the movable ball 12 to uniformly contact the ball track to be measured during the measurement process. This simplifies the operation and improves the measurement efficiency. This efficient measurement method is suitable for quality inspection of large batches of outer ball cage products on the production line. It can provide timely feedback on processing data, help adjust production process parameters, thereby effectively controlling and improving product quality, while saving a lot of manpower and time costs.

[0039] Work steps:

[0040] The outer ball cage to be tested is placed in the mounting area of ​​the workbench 10 so that the movable ball 12 can be aligned and initially contact the inner ball cage of the outer ball cage.

[0041] Start the lifting cylinder 16 to drive the cone shaft 11 to move axially downward.

[0042] As the conical platform 111 of the conical shaft 11 moves downward, its conical surface pushes the uniformly arranged movable balls 12 to move outward radially.

[0043] The movable balls 12 slide radially out along the T-shaped blocks 151 on their respective mounting plates 15 until their outer surfaces are tightly pressed against and uniformly tightened against each inner ball lane of the outer ball cage to be tested.

[0044] As the conical shaft 11 moves downward, the pressure plate 19 fixed on it also moves downward and pushes the measuring end of the measuring instrument 18. The measuring instrument 18 displays or records the axial displacement of the conical shaft 11 in real time.

[0045] The axial displacement read from the measuring table 18 is converted according to the known taper of the conical platform 111 of the conical shaft 11, so that the combined diameter of the outer ball cage at the measuring position can be obtained.

[0046] The lifting cylinder 16 reverses its movement, causing the cone shaft 11 to reset, and the movable ball 12 retracts under the action of the return spring (not shown in the figure, but it is a conventional design) or manual operation by the operator.

[0047] When measuring the range of fairway diameters, rotate the outer cage to be measured by a certain angle (for example, for a six-fairy outer cage, rotate 60 degrees or a specific angle to measure different combinations of fairways), repeat the above measurement steps, and obtain multiple sets of fairway diameter values. By comparing these measurements, the range of fairway diameters can be calculated.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A range measurement device for the diameter of the outer ball cage channel, comprising a worktable (10), characterized in that: The top of the workbench (10) is provided with an installation device. Both the workbench (10) and the installation device are permeated by a conical shaft (11). At least three movable balls (12) are evenly arranged on the outer ring of the conical shaft (11). The installation device includes a base (13) and an annular shell (14). Both the base (13) and the annular shell (14) are fixed with an adjustable mounting plate (15). The mounting plate (15) is used to slide with the movable balls (12). A lifting cylinder (16) is fixedly connected to the bottom of the conical shaft (11). The lifting cylinder (16) is used to drive the conical shaft (11) to make axial displacement. A measuring instrument (18) is fixed to the bottom of the worktable (10) through the mounting bracket (17). A lower pressure plate (19) is fixed to the outer ring of the conical shaft (11). The lower pressure plate (19) is in contact with the measuring end of the measuring instrument (18).

2. The range measurement device for the diameter of the outer ball cage channel according to claim 1, characterized in that: The conical shaft (11) consists of a conical platform (111) with an upper diameter greater than the lower diameter and a shaft (112) fixed to the bottom of the conical platform (111) and extending downward. The shaft (112) slides through the base (13) and the worktable (10) and is fixedly connected to the output end of the lifting cylinder (16).

3. The range measurement device for the diameter of the outer ball cage channel according to claim 1, characterized in that: The bottom of the workbench (10) is fixed with an L-shaped rod (20), and the surface of the L-shaped rod (20) is fixedly connected to the lifting cylinder (16) by bolts.

4. The range measurement device for the diameter of the outer ball cage channel according to claim 1, characterized in that: The base (13) and annular shell (14) of the mounting device are provided with a number of identical first mounting holes, and each mounting plate (15) is provided with a second mounting hole that matches the first mounting hole at its corresponding position.

5. The range measurement device for the diameter of the outer ball cage channel according to claim 4, characterized in that: The base (13) and the annular shell (14) are each provided with screws (21) corresponding to the number of mounting plates (15). The screws (21) pass through the first mounting hole and the second mounting hole in sequence, thereby fixing the mounting plates (15) on the base (13) and the annular shell (14).

6. The range measurement device for the diameter of the outer ball cage channel according to claim 1, characterized in that: The movable ball (12) is provided with T-shaped grooves (121) at both the upper and lower ends. The mounting plate (15) is provided with T-shaped blocks (151) that slide in cooperation with the T-shaped grooves (121). The movable ball (12) slides radially along the mounting plate (15) and abuts against the inner ball lane of the outer ball cage to be tested.

7. The range measurement device for the diameter of the outer ball cage channel according to claim 6, characterized in that: The T-block (151) and the T-groove (121) are fitted with a clearance to compensate for changes caused by thermal expansion and oil contamination.

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