Gasket Missing Detection Device

Abstract

The present invention discloses a gasket missing detection device, which includes a base, a bracket and an oscilloscope. The bracket is arranged on the base, and an upper support rod and a lower support rod are also connected to the bracket. An upper air cylinder is movably connected to the upper support rod, and a rising sleeve is connected to the downward end of the upper air cylinder. An upper displacement sensor is also arranged on the upper support rod, and the upper displacement sensor is used to detect the axial displacement of the upper air cylinder. A lower air cylinder is movably connected to the lower support rod, and a lower rising sleeve is connected to the upward end of the lower air cylinder. A lower displacement sensor is also arranged on the lower support rod, and the lower displacement sensor is used to detect the axial displacement of the lower air cylinder. A motor is arranged on the base, and the motor is connected to the lower air cylinder through a transmission device and can drive the lower air cylinder to rotate. The oscilloscope is connected to the upper displacement sensor and the lower displacement sensor. Using the device can quickly detect whether the gasket is missing, and without disassembling the differential, it is convenient for on-line detection of the differential assembly line.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection equipment, and specifically relates to a gasket missing detection device. Background Art

[0002] A differential is a mechanism that enables the left and right drive wheels to rotate at different speeds. It mainly consists of left and right half-axle gears, two planetary gears, and a gear carrier. The above-mentioned components are all arranged inside the differential housing. To prevent the gears from contacting the housing and excessive wear, and to control the gear end play, gaskets are provided between the planetary gears and the transmission housing. Since the gaskets are placed inside the differential housing, conventional cameras and laser detection equipment cannot detect whether the gaskets are missing. Currently, during the production process, the entire differential is disassembled to check whether the gaskets are missing, and then the differential is reassembled after the inspection. This detection method takes a long time and requires workers with considerable experience to operate. Otherwise, it is easy to damage the differential during the disassembly process. For assembly lines with extremely strict beat requirements, the disadvantages of the above method are self-evident. The labor cost and production efficiency of using this method to check whether the differential gaskets are missing cannot meet the requirements of the assembly line. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to address the deficiencies in the current technology and provide a gasket missing detection device. Using this device can quickly detect whether the gaskets are missing without disassembling the differential, which is convenient for on-line detection of the differential on the assembly line.

[0004] Technical Solution: To achieve the above object, the present invention provides a gasket missing detection device, including a base, a bracket, and an oscilloscope. The bracket is arranged on the base, and an upper support rod and a lower support rod are also connected to the bracket. An upper air cylinder is movably connected to the upper support rod. The lower end of the upper air cylinder is connected to an upper expanding sleeve. An upper displacement sensor is also arranged on the upper support rod, and the upper displacement sensor is used to detect the axial displacement of the upper air cylinder. A lower air cylinder is movably connected to the lower support rod. The upper end of the lower air cylinder is connected to a lower expanding sleeve. A lower displacement sensor is also arranged on the lower support rod, and the lower displacement sensor is used to detect the axial displacement of the lower air cylinder. A motor is arranged on the base, and the motor is connected to the lower air cylinder through a transmission device and can drive the lower air cylinder to rotate. The oscilloscope is connected to the upper displacement sensor and the lower displacement sensor.

[0005] As an improvement of this solution, the axes of the upper air cylinder and the lower air cylinder are collinear.

[0006] As an improvement of this solution, the motor and the lower air cylinder are connected and driven by a belt.

[0007] Beneficial effects: When the gasket missing detection device of the present invention is in use, the upper cylinder inserts the rising sleeve into the upper half shaft gear hole and then the sleeve expands and tightens. At this time, the rising sleeve and the upper half shaft gear are an integral whole. At this time, the upper cylinder continues to apply a downward force. The downward force of the upper cylinder is transmitted to the upper half shaft gear through the sleeve, and the upper half shaft gear acts downward and meshes with the planetary gear. Similarly, the lower cylinder inserts the sleeve into the lower half shaft gear hole and then the sleeve expands and tightens. At this time, the lower sleeve and the lower half shaft gear are an integral whole. At this time, the lower cylinder continues to apply an upward force. The upward force of the lower cylinder is transmitted to the lower half shaft gear through the lower sleeve, and the lower half shaft gear acts upward and meshes with the planetary gear. The motor drives the sleeve shaft to rotate. The upper and lower half shaft gears mesh with the planetary gear and rotate under the continuous action of the cylinder. During the rotation of the planetary gear, under the continuous action of the upper and lower cylinders, it is subjected to a lateral force. Since there is a certain gap between the planetary gear and the housing, the planetary gear has a certain amount of axial play. This amount of axial play will be reflected on the half shaft gear meshing with it. Since the upper and lower half shaft gears are tightly expanded together with the upper and lower sleeves respectively and are an integral whole at this time, the amount of axial play will be measured by the upper and lower displacement sensors. The oscilloscope can receive the measurement data of the upper and lower displacement sensors and obtain a waveform diagram. If the gasket is not installed in the differential, the amount of axial play of the planetary gear is relatively large, which is reflected on the waveform diagram as a larger gap between adjacent wave peaks and wave valleys. By detecting the gap value between the wave peaks and wave valleys, it can be known whether the gasket is installed in the differential.

[0008] The described gasket missing detection device can be set in an automatic production line to perform on-line detection on the differential. Compared with the traditional manual disassembly, assembly and visual inspection method, it can greatly shorten the detection time, improve the production line efficiency. At the same time, this device can realize automatic detection without the need for on-site staff, greatly reducing the labor cost. Brief Description of the Drawings

[0009] Figure 1 Structural schematic diagram of the described gasket missing detection device;

[0010] Figure 2 Structural schematic diagram of the described differential;

[0011] Figure 3 Oscilloscope waveform diagram without gasket;

[0012] Figure 4 Oscilloscope waveform diagram with gasket;

[0013] List of reference numerals: 1, differential; 10, housing; 11, upper half shaft gear; 12, lower half shaft gear; 13, left planetary gear; 14, right planetary gear; 15, gasket; 16, planetary gear shaft; 20, base; 21, bracket; 22, upper bracket rod; 23, lower bracket rod; 24, upper displacement sensor; 25, upper cylinder; 26, upper expansion sleeve; 27, lower displacement sensor; 28, lower cylinder; 29, lower expansion sleeve; 30, motor; 31, belt. Detailed implementation mode

[0014] The present invention will be further illustrated below in conjunction with the drawings and the detailed implementation mode. It should be understood that the following detailed implementation mode is only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0015] As Figure 1 shown, a gasket missing detection device includes a base 20, a bracket 21 and an oscilloscope 2. The bracket 21 is arranged on the base 20. The bracket 21 is also connected with an upper bracket rod 22 and a lower bracket rod 23. An upper cylinder 25 is movably connected to the upper bracket rod 22. The lower end of the upper cylinder 25 is connected with an upper expansion sleeve 26. An upper displacement sensor 24 is also arranged on the upper bracket rod 22. The upper displacement sensor 24 is used to detect the axial displacement of the upper cylinder 25. A lower cylinder 29 is movably connected to the lower bracket rod 23. The upper end of the lower cylinder 29 is connected with a lower expansion sleeve 29. A lower displacement sensor 27 is also arranged on the lower bracket rod 23. The lower displacement sensor 27 is used to detect the axial displacement of the lower cylinder 29. The axes of the upper cylinder 25 and the lower cylinder 29 are collinear. A motor 30 is arranged on the base 20. The motor 30 is connected to the lower cylinder 29 through a belt 31 and can drive the lower cylinder 29 to rotate. The oscilloscope 2 is connected to the upper displacement sensor 24 and the lower displacement sensor 27.

[0016] The structure of the differential 1 is as Figure 2 shown, including a housing 10, an upper half shaft gear 11, a lower half shaft gear 12, a left planetary gear 13, a right planetary gear 14 and a gasket 15. A planetary gear shaft 16 is inserted between the left planetary gear 13 and the right planetary gear 14.

[0017] When the device is used for actual measurement, the upper cylinder 25 extends the rising sleeve 26 into the hole of the upper half shaft gear 11 and then tightens the sleeve. At this time, the rising sleeve 26 and the upper half shaft gear 11 are an integral whole. At this time, the upper cylinder 25 continues to apply a downward force. The downward force of the upper cylinder 25 is transmitted to the upper half shaft gear 11 through the sleeve, and the upper half shaft gear acts downward to mesh with the planetary gear. Similarly, after the lower cylinder 29 extends the sleeve into the hole of the lower half shaft gear 12 and then tightens the sleeve, the lower rising sleeve 29 and the lower half shaft gear 12 are an integral whole at this time. At this time, the lower cylinder 29 continues to apply an upward force. The upward force of the lower cylinder 29 is transmitted to the lower half shaft gear 12 through the lower sleeve 29, and the lower half shaft gear 12 acts upward to mesh with the planetary gear. The motor 30 drives the sleeve shaft to rotate, and the upper and lower half shaft gears 12 mesh with the planetary gear and rotate under the continuous action of the cylinder. The oscilloscope 2 can receive the measurement data of the upper displacement sensor 24 and the lower displacement sensor 27 and obtain a waveform diagram. When the gasket 15 is not installed in the differential 1, the planetary gear has a large amount of end play, which is reflected in the waveform diagram as a larger gap between adjacent wave peaks and wave valleys, as shown in Figure 3 shown, the value of A is larger; when the gasket 15 is installed in the differential 1, the planetary gear has a small amount of end play, which is reflected in the waveform diagram as a smaller gap between adjacent wave peaks and wave valleys, as shown in Figure 4 shown, the value of A is smaller. By judging the size of the value of A, it can be determined whether the gasket 15 is installed in the differential 1.

[0018] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A differential gasket missing detection device, characterized in that, It includes a base, a bracket and an oscilloscope. The bracket is arranged on the base, and an upper support rod and a lower support rod are also connected to the bracket. An upper air cylinder is movably connected to the upper support rod. One end of the upper air cylinder facing downward is connected to an upper expansion sleeve. An upper displacement sensor is also arranged on the upper support rod, and the upper displacement sensor is used to detect the axial displacement of the upper air cylinder. A lower air cylinder is movably connected to the lower support rod. One end of the lower air cylinder facing upward is connected to a lower expansion sleeve. A lower displacement sensor is also arranged on the lower support rod, and the lower displacement sensor is used to detect the axial displacement of the lower air cylinder. A motor is arranged on the base, and the motor is connected to the lower air cylinder through a transmission device and can drive the lower air cylinder to rotate. The oscilloscope is connected to the upper displacement sensor and the lower displacement sensor.

2. The differential gasket missing detection device according to claim 1, wherein: The axes of the upper air cylinder and the lower air cylinder are collinear.

3. The differential gasket missing detection device according to claim 2, characterized in that: The motor and the lower air cylinder are connected and driven by a belt.

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