Spline coaxiality detection device

Abstract

The utility model discloses a spline coaxiality detection device, and relates to the technical field of spline coaxiality detection. The structure comprises a detection equipment box and a spline lower positioning seat. The detection equipment box comprises an upper box body and a lower box body which are connected into a whole; a partition flat plate is arranged between the upper box body and the lower box body; a vertically arranged linear guide rail is mounted on the inner wall of the upper box body; a linear sliding block is slidably mounted on the linear guide rail; a spline upper positioning seat is mounted on the linear sliding block; the spline upper positioning seat comprises a rotary upper tip; and the spline lower positioning seat comprises a lower tip which is rotationally matched with the partition flat plate through a bearing. According to the utility model, the high-precision angle measurement capability of the double-shaft photoelectric auto-collimator is combined with the precise position adjustment of the lifting device, so that the precise detection of the coaxiality of the spline is realized. The device can effectively measure the angular deviation of each section of the spline relative to the reference axis, further calculates the coaxiality error, and meets the high-precision detection requirement.

Description

Technical Field

[0001] This utility model belongs to the field of spline coaxiality detection technology, and in particular relates to a spline coaxiality detection device. Background Technology

[0002] In the production and processing of splines, coaxiality is one of the important indicators for measuring its quality. Coaxiality deviation directly affects the assembly accuracy, transmission efficiency, and service life of the spline. Therefore, high-precision coaxiality testing of splines is of great significance.

[0003] Traditional methods for testing spline coaxiality often rely on manual measurement or simple mechanical tools, resulting in low accuracy, low efficiency, and poor repeatability. With the continuous development of industrial manufacturing technology, higher demands are being placed on the accuracy and efficiency of spline coaxiality testing. Especially in fields such as precision machinery, aerospace, and automotive manufacturing, the accuracy of spline coaxiality testing has reached the micrometer level or even higher. Existing coaxiality testing devices are often complex in structure, cumbersome in operation, and difficult to adapt to the testing needs of splines of different sizes and shapes. Furthermore, some devices pose safety hazards during testing, such as impacts from sharp points, which can easily damage the spline and the testing device. In addition, traditional testing devices often lack automation and intelligent functions, making it difficult to meet the demands of modern industrial production for efficient and accurate testing.

[0004] Therefore, it is particularly important to develop a spline coaxiality testing device that is simple in structure, easy to operate, highly accurate, and highly efficient. Utility Model Content

[0005] The purpose of this invention is to provide a spline coaxiality detection device, which integrates a dual-axis photoelectric autocollimator and a high-precision mechanical positioning system to achieve high-precision and high-efficiency detection of spline coaxiality.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a spline coaxiality testing device, comprising a testing equipment box and a spline lower positioning seat; the testing equipment box includes an upper box and a lower box connected as one piece; a partition plate is provided between the upper box and the lower box; a vertically arranged linear guide rail is installed on the inner wall of the upper box; a linear slider is slidably mounted on the linear guide rail; a spline upper positioning seat is installed on the linear slider; the spline upper positioning seat includes a rotating upper center; the spline lower positioning seat includes a lower center that rotates with the partition plate through a bearing; the lower center and the upper center are coaxially arranged; a lifting device is fixed to one inner wall of the upper box; a dual-axis photoelectric autocollimator perpendicularly pointing to the axis of the upper center is installed on the horizontal platform of the lifting device.

[0008] As a preferred technical solution of this utility model, a limit baffle is fixed on the inner wall of the upper box and located at the lower end of the linear guide rail.

[0009] As a preferred embodiment of this utility model, the positioning seat on the spline further includes a T-shaped plate that is connected and cooperates with the linear slider; the upper center is mounted on the horizontal plate of the T-shaped plate by a bearing.

[0010] As a preferred embodiment of this utility model, a cylindrical rod is fixed on the horizontal plate of the T-shaped plate; a plurality of counterweights are sleeved on the cylindrical rod.

[0011] As a preferred embodiment of this utility model, the splined lower positioning seat further includes a servo motor and a motor mounting bracket; the motor mounting bracket is fixed to the bottom surface of the lower housing; the servo motor is mounted on the motor mounting bracket, and the output shaft of the servo motor is connected to the lower center via a coupling.

[0012] As a preferred embodiment of this utility model, the lifting device further includes a rectangular frame and a lead screw motor; four vertically arranged guide cylindrical rods are fixed between the upper and lower inner walls of the rectangular frame; four sliding sleeves that slide axially with the guide cylindrical rods are fixed through the horizontal platform; the lead screw motor is installed through the upper end of the rectangular frame; the horizontal platform is driven by the lead screw thread of the lead screw motor.

[0013] As a preferred embodiment of this utility model, an upper box door is installed at the opening end of the upper box; a lower box door is installed at the opening end of the lower box.

[0014] This utility model has the following beneficial effects:

[0015] This invention utilizes the high-precision angle measurement capability of a dual-axis photoelectric autocollimator, combined with the precise position adjustment of a lifting device, to achieve accurate detection of spline coaxiality. This device can effectively measure the angular deviation of each section of the spline relative to the reference axis, and then calculate the coaxiality error, meeting the requirements for high-precision testing.

[0016] This invention integrates a servo motor and a lead screw motor for the lifting device, enabling automatic rotation of the spline and automatic adjustment of the measurement position, greatly improving testing efficiency. Simultaneously, the quick and convenient spline loading process further shortens the testing cycle.

[0017] This invention effectively avoids the risk of collision during the testing process by setting a limiting baffle between the lower and upper centers, ensuring the stability and safety of the testing device. Furthermore, the counterweight on the positioning seat of the spline enhances the stability when the spline is clamped and rotated, improving the reliability of the measurement.

[0018] The design of this lifting device allows the dual-axis photoelectric autocollimator to be adjusted at different heights, thereby enabling coaxiality detection of splines at different axial directions. This flexibility allows the device to adapt to the detection needs of splines of different sizes and shapes.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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 these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the spline coaxiality detection device of this utility model.

[0022] Figure 2 for Figure 1 The front view.

[0023] Figure 3 This is a partial structural schematic diagram of the present invention.

[0024] Figure 4 This is a schematic diagram of the splined lower positioning seat and the dual-axis photoelectric autocollimator.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1-Detection equipment box, 11-Upper box, 12-Lower box, 13-Divider plate, 14-Limit baffle, 2-Linear guide rail, 3-Linear slider, 4-Spline upper positioning seat, 41-Upper center, 42-T-shaped plate, 43-Cylindrical rod, 5-Spline lower positioning seat, 51-Lower center, 52-Servo motor, 53-Motor mounting bracket, 6-Lifting device, 61-Horizontal platform, 62-Rectangular frame, 63-Screw motor, 64-Guide cylindrical rod, 65-Sliding sleeve, 7-Dual-axis photoelectric autocollimator, 8-Counterweight. Detailed Implementation

[0027] 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 scope of protection of the present utility model.

[0028] Specific Implementation Example 1: Please refer to... Figure 1-4 As shown, this utility model is a spline coaxiality testing device, including a testing equipment box 1 and a spline lower positioning seat 5. The testing equipment box 1 includes an upper box 11 and a lower box 12 connected as one piece. A partition plate 13 is placed between the upper box 11 and the lower box 12. A vertically arranged linear guide rail 2 is installed on the inner wall of the upper box 11. A linear slider 3 is slidably installed on the linear guide rail 2. A spline upper positioning seat 4 is installed on the linear slider 3. The spline upper positioning seat 4 includes a rotating upper center 41. The spline lower positioning seat 5 includes a lower center 51 that rotates with the partition plate 13 through a bearing. The lower center 51 and the upper center 41 are coaxially arranged. A shaft end center hole is opened at both the upper and lower ends of the spline, and the upper and lower ends of the spline are correspondingly installed between the upper center 41 and the lower center 51. A lifting device 6 is fixed on one inner wall of the upper box 11. A dual-axis photoelectric autocollimator 7, which is vertically pointing to the axis of the upper center 41, is installed on the horizontal platform 61 of the lifting device 6. The dual-axis photoelectric autocollimator 7 in this embodiment is existing technology, model 10M. It is an electronic autocollimator that combines electronic eyepiece technology, high-resolution image sensing technology and embedded digital image processing technology. It can measure the angle in two directions at the same time and provide high-precision measurement.

[0029] To prevent the lower center 51 from colliding with the upper center 41, a limit baffle 14 is fixed on the inner wall of the upper housing 11 and at the lower end of the linear guide rail 2. When not in use, the linear slider 3 slides to its lower end and rests on the limit baffle 14, ensuring a safe distance between the upper center 41 and the lower center 51.

[0030] The spline upper positioning seat 4 also includes a T-shaped plate 42 that connects and mates with the linear slider 3. The upper center 41 is mounted on the horizontal plate of the T-shaped plate 42 via bearings. To ensure stability when the spline is rotated by the upper and lower positioning seats 4 and 5, a cylindrical rod 43 is fixed to the horizontal plate of the T-shaped plate 42. Multiple counterweights 8 are fitted onto the cylindrical rod 43. Increasing the counterweights improves stability when the spline is rotated.

[0031] The spline lower positioning seat 5 also includes a servo motor 52 and a motor mounting bracket 53. The motor mounting bracket 53 is fixed to the bottom surface of the lower housing 12. The servo motor 52 is mounted on the motor mounting bracket 53, and the output shaft of the servo motor 52 is connected to the lower center point 51 via a coupling. The spline lower positioning seat 5 provides support for the bottom of the spline and drives the spline to rotate.

[0032] The lifting device 6 also includes a rectangular frame 62 and a lead screw motor 63. Four vertically arranged guide cylindrical rods 64 are fixed between the upper and lower inner walls of the rectangular frame 62. Four sliding sleeves 65, which axially slide and engage with the guide cylindrical rods 64, are fixed through the horizontal platform 61. The lead screw motor 63 is installed through the upper end of the rectangular frame 62. The horizontal platform 61 is driven by the lead screw thread of the lead screw motor 63. The lead screw motor 63 of the lifting device 6 drives the horizontal platform 61, carrying a dual-axis photoelectric autocollimator 7, to adjust its vertical position and perform coaxiality detection on the different axial positions of the spline.

[0033] To minimize external interference during testing, an upper door is installed at the opening of the upper chamber 11. A lower door is installed at the opening of the lower chamber 12.

[0034] When loading the spline, the upper positioning seat 4 and the linear slider 3 are lifted and moved upwards along the linear guide rail 2, so that the center hole of the lower shaft end of the spline is inserted into the lower center 51. Then, the upper positioning seat 4 is lowered so that the upper center 41 is inserted into the center hole of the upper shaft end of the spline. The entire spline loading process is convenient and fast.

[0035] Spline coaxiality testing process;

[0036] 1) Equipment Preparation and Calibration: Place the spline coaxiality testing device on a stable workbench, ensuring that the testing equipment box 1 is stable and free from shaking. Open the upper and lower boxes, and adjust the biaxial photoelectric autocollimator 7 to an appropriate height using the lifting device 6 so that its optical axis can be aligned with the axis of the spline to be tested. Calibrate the biaxial photoelectric autocollimator 7 using standard calibration tools to ensure its measurement accuracy and precision.

[0037] 2) Spline Installation and Positioning: Place the spline to be tested on the lower positioning seat 5, ensuring that the center hole at the lower end of the spline shaft is aligned and in contact with the lower center point 51. Slowly lift the upper positioning seat 4 and the linear slider 3 along the linear guide 2 until the upper center point 41 is inserted into the center hole at the upper end of the spline shaft. Ensure that the upper center point 41 and the lower center point 51 are coaxial. Start the servo motor 52, which drives the lower center point 51 to rotate via the coupling, thereby rotating the spline. This helps to uniformly detect the coaxiality of each section of the spline in subsequent measurements.

[0038] 3) Measurement and Data Acquisition: The position of the dual-axis photoelectric autocollimator 7 is adjusted using the lifting device 6, and the dual-axis photoelectric autocollimator 7 is activated to perform measurements, recording the angular deviations (Δα, Δβ) of each spline section relative to the reference axis. These angular deviations reflect the spatial coordinate offset of the center point of each spline section. During the spline rotation, the dual-axis photoelectric autocollimator 7 continuously acquires data to ensure complete coaxiality information of each spline section is obtained.

[0039] 4) Data Processing and Coaxiality Calculation: The collected angular deviation data is converted into spatial coordinate offsets (Δx, Δy), and then the distance from the center point of each section to the reference axis (i.e., radial deviation) is calculated. According to the definition of coaxiality, twice the maximum radial deviation of the measured axis relative to the reference axis is determined as the coaxiality error value. Statistical analysis is performed on the measurement data to evaluate the overall condition and consistency of the spline coaxiality.

[0040] Through the above process, the spline coaxiality detection device described above can achieve accurate measurement and evaluation of spline coaxiality, providing strong support for spline quality control.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A spline coaxiality detection device, characterized in that: comprising a detection equipment box (1), a spline lower positioning seat (5); the detection equipment box (1) comprises an upper box body (11) and a lower box body (12) connected as a whole; the upper box body (11) and the lower box body (12) are separated by a partition plate (13); a vertical linear guide rail (2) is installed on the inner wall of the upper box body (11); a linear sliding block (3) is slidingly installed on the linear guide rail (2); a spline upper positioning seat (4) is installed on the linear sliding block (3); the spline upper positioning seat (4) comprises a rotating upper center (41); the spline lower positioning seat (5) comprises a lower center (51) rotatingly matched with the partition plate (13); the lower center (51) is coaxially arranged with the upper center (41); a lifting device (6) is fixed on one side of the inner wall of the upper box body (11); a double-axis photoelectric autocollimator (7) vertically pointing to the axis of the upper center (41) is installed on the horizontal platform (61) of the lifting device (6). A limiting baffle (14) is fixed on the inner wall of the upper box body (11) and located at the lower end of the linear guide rail (2).

2. The spline coaxiality detection device of claim 1, wherein The spline upper positioning seat (4) further comprises a T-shaped plate (42) connected and matched with the linear sliding block (3); the upper center (41) is installed on the horizontal plate of the T-shaped plate (42) through a bearing.

3. The spline coaxiality detection apparatus of claim 1, wherein A cylindrical rod (43) is fixed on the horizontal plate of the T-shaped plate (42); a plurality of counterweights (8) are installed on the cylindrical rod (43) in a sleeved manner.

4. The spline coaxiality detection apparatus of claim 3, wherein The spline lower positioning seat (5) further comprises a servo motor (52) and a motor mounting rack (53); the motor mounting rack (53) is fixed to the inner bottom surface of the lower box body (12); the servo motor (52) is installed on the motor mounting rack (53), and the output shaft of the servo motor (52) is connected with the lower center (51) through a shaft coupling.

5. The spline straightness detection apparatus according to claim 1, characterized by The lifting device (6) further comprises a rectangular frame (62) and a lead screw motor (63); four vertically arranged guide cylindrical rods (64) are fixed between the upper and lower inner walls of the rectangular frame (62); four sliding sleeves (65) axially slidingly matched with the guide cylindrical rods (64) are fixed through the horizontal platform (61); the lead screw motor (63) is installed through the upper end of the rectangular frame (62); the horizontal platform (61) is driven in screw thread connection with the lead screw of the lead screw motor (63).

6. The spline straightness detection apparatus according to claim 1, characterized by An upper box door is installed at the opening end of the upper box body (11); a lower box door is installed at the opening end of the lower box body (12).

7. The spline straightness detection apparatus according to claim 1, characterized by ​

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