Coaxiality detection device for automobile transmission shaft

Abstract

The utility model discloses an automobile transmission shaft coaxiality detection device which comprises a rack, an adjustable positioning mechanism and a supporting assembly used for supporting a transmission shaft are arranged on the rack, the adjustable positioning mechanism comprises a positioning disc and a horizontal ejector rod opposite to the positioning disc in position, one end of the positioning disc is provided with a guide hole, and the other end of the positioning disc is provided with a horizontal ejector rod. A guide hole is formed in the rack, a positioning column matched with a transmission shaft flange plate positioning hole is arranged in the guide hole, a pre-tightening spring is arranged in the guide hole, one end of the pre-tightening spring abuts against the inner wall of the guide hole, and the other end of the pre-tightening spring abuts against the end, located in the guide hole, of the positioning column; according to the coaxiality detection device for the automobile transmission shaft, the adjustable positioning mechanism is arranged, the positioning columns are matched with the positioning holes of the flange plate of the transmission shaft, the transmission shaft is quickly positioned, the positioning columns can adapt to the positioning holes with different depths through the arrangement of the pre-tightening springs, and the accuracy and the stability of positioning are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive manufacturing testing technology, specifically a device for detecting the coaxiality of automotive drive shafts. Background Technology

[0002] In automotive transmission systems, the coaxiality of the driveshaft is a critical parameter affecting vehicle stability, reliability, and lifespan. Poor driveshaft coaxiality can lead to severe vibrations and abnormal noise during vehicle operation, reducing ride comfort, accelerating wear on transmission components, and even posing safety hazards. Therefore, accurate detection of driveshaft coaxiality is essential for ensuring the normal operation of automotive transmission systems.

[0003] Currently, the methods for testing the coaxiality of automotive driveshafts mainly rely on manual measurement or the use of relatively simple tooling equipment. However, existing coaxiality testing devices are not efficient enough when faced with a large number of automotive driveshaft testing operations, requiring more time for positioning and installation, and cannot meet the demands of the modern automotive manufacturing industry for high-precision and high-efficiency testing. Summary of the Invention

[0004] To address the shortcomings mentioned in the background art, the purpose of this utility model is to provide a coaxiality detection device for automotive drive shafts. By setting an adjustable positioning mechanism, the device utilizes the cooperation between the positioning pin and the positioning hole of the drive shaft flange to achieve rapid positioning of the drive shaft. The preload spring enables the positioning pin to adapt to positioning holes of different depths, thereby improving the accuracy and stability of positioning.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A coaxiality testing device for automotive drive shafts includes a frame, on which an adjustable positioning mechanism and a support assembly for supporting the drive shaft are mounted. The adjustable positioning mechanism includes a positioning disc and a horizontal push rod positioned opposite the positioning disc. One end of the positioning disc has a guide hole, and a positioning pin matching the positioning hole of the drive shaft flange is disposed inside the guide hole. A preload spring is disposed inside the guide hole, with one end of the preload spring abutting against the inner wall of the guide hole and the other end abutting against the end of the positioning pin located inside the guide hole. A testing assembly is mounted on the frame.

[0007] More preferably, the adjustable positioning mechanism further includes a drive assembly, the drive assembly including a drive motor fixedly mounted on the frame, the output end of the drive motor being fixedly connected to a drive shaft, a transmission sleeve being slidably sleeved on the drive shaft, an mounting plate being fixedly mounted on one side of the transmission sleeve, and the positioning disk being detachably mounted on the mounting plate.

[0008] More preferably, a sliding key is fixedly connected inside the transmission sleeve, and a keyway is provided on the drive shaft to slide and engage with the sliding key.

[0009] More preferably, both the drive shaft and the transmission sleeve are fixedly connected to a boss, a compression spring is provided between the two bosses, the compression spring is sleeved on the drive shaft and the transmission sleeve, and a pull ring is fixedly connected to the mounting plate.

[0010] More preferably, the support assembly includes bases symmetrically mounted on the top of the frame, with slide rods symmetrically fixed between the two bases, and bases slidably sleeved on the two slide rods. V-shaped mounting grooves are symmetrically opened on the bases, and slide rollers are rotatably mounted inside the V-shaped mounting grooves. A horizontal top rod is slidably sleeved on the slide rod, and a fixing screw is vertically provided on the horizontal top rod for fixing the horizontal top rod to the frame.

[0011] More preferably, the detection assembly includes a multi-section detection arm fixedly mounted on a frame, with a dial indicator at the free end of the multi-section detection arm, the probe of the dial indicator facing the center of the drive shaft.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model achieves rapid positioning of the drive shaft by setting an adjustable positioning mechanism and utilizing the cooperation between the positioning pin and the positioning hole of the drive shaft flange. The setting of the pre-tightening spring enables the positioning pin to adapt to positioning holes of different depths, thereby improving the accuracy and stability of positioning.

[0014] 2. The drive assembly of this utility model allows the drive shaft to rotate during the testing process, facilitating all-round testing of coaxiality. The cooperation of the sliding key and keyway ensures that the transmission sleeve can transmit torque while sliding on the drive shaft. The compression spring allows the positioning plate to move elastically within a certain range, avoiding damage to the equipment and drive shaft from rigid collisions.

[0015] 3. The support component of this utility model adopts a combination of V-shaped mounting groove and sliding roller, which can adapt to drive shafts of different diameters. Furthermore, the sliding roller makes the frictional resistance of the drive shaft small during rotation, resulting in smoother rotation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the adjustable positioning mechanism in this utility model;

[0019] Figure 3 This is a schematic diagram of the drive component structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the support component structure in this utility model.

[0021] In the picture:

[0022] 1. Frame; 2. Adjustable positioning mechanism; 21. Positioning plate; 22. Horizontal top rod; 23. Guide hole; 24. Positioning column; 25. Preload spring; 26. Drive assembly; 261. Drive motor; 262. Drive shaft; 263. Transmission sleeve; 264. Mounting plate; 265. Slide key; 266. Keyway; 267. Boss; 268. Compression spring; 269. Pull ring; 3. Support assembly; 31. Base; 32. Slide rod; 33. Base; 34. V-shaped mounting groove; 35. Slide roller; 36. Fixing screw; 4. Detection assembly; 41. Multi-section detection arm; 42. Dial indicator. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] like Figure 1-4 As shown, an automotive driveshaft coaxiality testing device includes a frame 1, which serves as a basic support structure, providing a stable mounting platform for the entire testing device. The frame 1 is equipped with an adjustable positioning mechanism 2 and a support assembly 3 for supporting the driveshaft. The support assembly 3 includes a base 31 symmetrically mounted on the top of the frame 1. Through V-shaped mounting grooves 34 and sliding rollers 35 symmetrically arranged on the base 31, it can adaptively support driveshafts of different diameters, and the rolling contact of the sliding rollers 35 reduces the frictional resistance during driveshaft rotation.

[0026] The adjustable positioning mechanism 2 includes a positioning disk 21 and a horizontal push rod 22 positioned opposite to the positioning disk 21. One end of the positioning disk 21 has a guide hole 23. Inside the guide hole 23 is a positioning pin 24 that matches the positioning hole of the drive shaft flange. A preload spring 25 is also installed inside the guide hole 23. One end of the preload spring 25 abuts against the inner wall of the guide hole 23, and the other end abuts against the end of the positioning pin 24 located inside the guide hole 23. Through the elastic action of the preload spring 25, the positioning pin 24 can extend and retract within the guide hole 23, achieving adaptive compensation for positioning holes of different depths, ensuring positioning accuracy while avoiding damage caused by rigid contact.

[0027] The adjustable positioning mechanism 2 also includes a drive assembly 26, which includes a drive motor 261 fixedly mounted on the frame 1. The drive motor 261 serves as a power source, and its output end is fixedly connected to a drive shaft 262, which slides in conjunction with the keyway 266 of the transmission sleeve 263 via a sliding key 265. This allows the transmission sleeve 263 to slide axially on the drive shaft 262 while transmitting torque to accommodate the testing requirements of transmission shafts of different lengths. A mounting plate 264 is fixedly mounted on one side of the transmission sleeve 263, and a positioning disc 21 is detachably mounted on the mounting plate 264, facilitating the replacement of the appropriate positioning disc 21 according to different specifications of transmission shafts.

[0028] Both the drive shaft 262 and the transmission sleeve 263 are fixedly connected to bosses 267. A compression spring 268 is disposed between the two bosses 267. The compression spring 268 is sleeved on the drive shaft 262 and the transmission sleeve 263. A pull ring 269 is fixedly connected to the mounting plate 264. The position of the positioning plate 21 can be manually adjusted through the pull ring 269. The compression spring 268 provides buffering and preload during the testing process to ensure a tight fit between the positioning plate 21 and the transmission shaft flange.

[0029] The horizontal push rod 22 is slidably sleeved on the slide rod 32. A fixing screw 36 is vertically provided on the horizontal push rod 22, which is used to fix the horizontal push rod 22 to the frame 1. By adjusting and fixing the position of the horizontal push rod 22, the other end of the drive shaft can be supported and limited, forming a stable inspection station in conjunction with the positioning plate 21.

[0030] The detection assembly 4 includes a multi-section detection arm 41 fixedly mounted on the frame 1. A dial indicator 42 is mounted on the free end of the multi-section detection arm 41, with the probe of the dial indicator 42 facing the center of the drive shaft. The multi-section detection arm 41 can be flexibly adjusted in space to ensure that the probe of the dial indicator 42 accurately contacts the part of the drive shaft being measured. By observing the change in the reading of the dial indicator 42 during the rotation of the drive shaft, the coaxiality deviation of the drive shaft can be detected in real time.

[0031] Working principle:

[0032] Preparation: Place the drive shaft to be tested on the slide roller 35 in the V-shaped mounting groove of the support assembly 3, adjust the position of the horizontal push rod 22 according to the length of the drive shaft, and fix it with the fixing screw 36.

[0033] Positioning and Installation: Pull the pull ring 269 to move the positioning plate 21 away from the drive shaft, compressing the compression spring 268. Align the flange positioning hole of the drive shaft with the positioning pin 24, release the pull ring 269, and under the action of the compression spring 268, the positioning plate 21 moves towards the drive shaft, and the positioning pin 24 inserts into the flange positioning hole, thus positioning the drive shaft.

[0034] Inspection arm adjustment: Adjust the position of the multi-section inspection arm 41 according to the diameter and position of the drive shaft, so that the probe of the dial indicator 42 gently contacts the surface of the drive shaft, and ensure that the probe is aligned with the axis of the drive shaft.

[0035] Coaxiality detection: The drive motor 261 is started, and the drive shaft 262 drives the transmission sleeve 263 to rotate, thereby causing the positioning disk 21 and the transmission shaft to rotate together. During the rotation of the transmission shaft, the dial indicator 42 detects the runout of the transmission shaft surface in real time and feeds back the data. By analyzing the data from the dial indicator 42, it is determined whether the coaxiality of the transmission shaft meets the requirements.

[0036] Inspection complete: After inspection, turn off drive motor 261, pull pull ring 269 to disengage positioning pin 24 from flange positioning hole, and remove drive shaft. Clean equipment to prepare for the next inspection.

[0037] 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.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A device for detecting the coaxiality of an automotive driveshaft, characterized in that, The device includes a frame (1), on which an adjustable positioning mechanism (2) and a support assembly (3) for supporting the drive shaft are provided. The adjustable positioning mechanism (2) includes a positioning plate (21) and a horizontal push rod (22) opposite to the positioning plate (21). One end of the positioning plate (21) is provided with a guide hole (23). Inside the guide hole (23) is a positioning pin (24) that matches the positioning hole of the drive shaft flange. Inside the guide hole (23) is a preload spring (25). One end of the preload spring (25) abuts against the inner wall of the guide hole (23), and the other end abuts against the end of the positioning pin (24) located inside the guide hole (23). The frame (1) is provided with a detection assembly (4).

2. The coaxiality detection device for automotive drive shafts according to claim 1, characterized in that, The adjustable positioning mechanism (2) further includes a drive assembly (26), which includes a drive motor (261) fixedly mounted on the frame (1). The output end of the drive motor (261) is fixedly connected to a drive shaft (262). A transmission sleeve (263) is slidably sleeved on the drive shaft (262). A mounting plate (264) is fixedly mounted on one side of the transmission sleeve (263). The positioning disk (21) is detachably mounted on the mounting plate (264).

3. The coaxiality detection device for automotive drive shafts according to claim 2, characterized in that, The transmission sleeve (263) is fixedly connected to a sliding key (265), and the drive shaft (262) is provided with a keyway (266) that slides with the sliding key (265).

4. The coaxiality detection device for automotive drive shafts according to claim 3, characterized in that, Both the drive shaft (262) and the transmission sleeve (263) are fixedly connected to bosses (267), and a compression spring (268) is provided between the two bosses (267). The compression spring (268) is sleeved on the drive shaft (262) and the transmission sleeve (263). A pull ring (269) is fixedly connected to the mounting plate (264).

5. The coaxiality detection device for automotive drive shafts according to claim 1, characterized in that, The support assembly (3) includes a base (31) symmetrically installed on the top of the frame (1), and a slide rod (32) symmetrically fixed between the two bases (31). A base (33) is slidably sleeved on the two slide rods (32). A V-shaped mounting groove (34) is symmetrically opened on the base (33). A slide roller (35) is rotatably installed inside the V-shaped mounting groove (34). A horizontal top rod (22) is slidably sleeved on the slide rod (32). A fixing screw (36) is vertically arranged on the horizontal top rod (22). The fixing screw (36) is used to fix the horizontal top rod (22) to the frame (1).

6. The coaxiality detection device for automotive drive shafts according to claim 1, characterized in that, The detection assembly (4) includes a multi-section detection arm (41) fixedly mounted on the frame (1). The free end of the multi-section detection arm (41) is provided with a dial indicator (42), and the probe of the dial indicator (42) faces the center of the drive shaft.

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