Dynamic balance detection device for automobile transmission shaft

Abstract

The utility model relates to the technical field of automobile transmission shaft dynamic balance detection, in particular to an automobile transmission shaft dynamic balance detection device, which comprises a rack, a detection mechanism is arranged on the rack and is used for detecting the dynamic balance of an automobile transmission shaft, and the detection mechanism comprises a main body assembly and an auxiliary body assembly, the main body assembly comprises a bedplate fixed at the top of the rack, and a sliding rail is mounted at the top of the bedplate; the driving assemblies are arranged at the two ends of the sliding rail and used for supporting and driving the automobile transmission shaft; the execution assembly comprises a sliding seat slidably installed on the sliding rail, ring seats are fixed to the two sides of the top of the sliding seat, three cavity holes distributed circumferentially are formed in the ring seats, threaded shaft sleeves are rotatably installed at the outer ends of the cavity holes, gears are fixed to the outer walls of the threaded shaft sleeves, and threaded cylinder rods are slidably installed in the cavity holes in a penetrating mode; by synchronously adjusting the radial movement of the three dial indicators, the contact pressure of the measuring heads is ensured to be consistent, three-point synchronous detection is realized, the dynamic balance state is comprehensively reflected, and the detection result is more accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the field of automotive drive shaft dynamic balance testing technology, specifically an automotive drive shaft dynamic balance testing device. Background Technology

[0002] The driveshaft is a high-speed, low-support rotating body, so its dynamic balance is crucial. Generally, driveshafts undergo dynamic balancing tests and adjustments on a balancing machine before leaving the factory. In front-engine, rear-wheel-drive vehicles, the driveshaft transmits the rotation of the transmission to the final drive; it can consist of several sections connected by universal joints.

[0003] According to CN219675353U, a dynamic balancing testing device for an automotive driveshaft is disclosed. This technology discloses a "dynamic balancing testing device for an automotive driveshaft, comprising a base plate, a movable groove located on one side of the base plate, and an adjusting seat located on one side of the movable groove. The base plate includes a dynamic balancing instrument disposed on one side of the top of the base plate, with a first mounting shaft disposed on the top of one side of the dynamic balancing instrument; and a controller disposed on the top of the dynamic balancing instrument." This device offers technical advantages such as: "The first lead screw and the internal thread on the inner side of a threaded hole cooperate to adjust the position of the adjusting block by driving the infrared distance sensor; the first movable hole prevents the second lead screw from affecting the adjustment of the adjusting block; the limiting hole and limiting rod make the adjustment of the adjusting seat and adjusting block more stable; and the infrared distance sensor can monitor the distance between the device and the driveshaft, thereby detecting the dynamic balance of the driveshaft and improving the detection accuracy of the testing device."

[0004] The above-mentioned single-point measurement method has the problem of one-sided detection results. During the rotation of the drive shaft, dynamic imbalance may occur due to uneven local mass distribution or structural deformation. Single-point detection can only reflect the radial runout at the measurement point and cannot fully capture the imbalance state in the circumferential direction of the drive shaft. It is easy to miss local defects or misjudge the overall balance, thus affecting the accuracy and reliability of the detection results. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a dynamic balance testing device for automotive drive shafts. By synchronously adjusting the radial movement of three dial indicators, it ensures consistent contact pressure of the probes, achieving synchronous three-point testing, comprehensively reflecting the dynamic balance state, and providing more accurate and reliable test results.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dynamic balancing testing device for automotive drive shafts, comprising a frame, wherein a testing mechanism is mounted on the frame and used for dynamic balancing testing of automotive drive shafts, the testing mechanism comprising:

[0007] The main components include a platform fixed to the top of the frame, with slide rails mounted on the top of the platform;

[0008] The drive assembly is located at both ends of the slide rail and is used to support and drive the vehicle's drive shaft.

[0009] The actuator includes a slide block slidably mounted on a slide rail. Ring seats are fixed on both sides of the top of the slide block. Three circumferentially distributed cavities are opened on the ring seats. Threaded bushings are rotatably mounted on the outer ends of the cavities. Gears are fixed to the outer wall of the threaded bushings. A threaded cylinder rod is slidably mounted through the cavities, and the outer wall of the threaded cylinder rod is threadedly connected to the inner wall of the threaded bushing. A dial indicator is installed inside the threaded cylinder rod. A handwheel is rotatably mounted on the outer wall of the slide block, and a gear ring is fixed on the handwheel. Each gear meshes with the gear ring for transmission.

[0010] Preferably, the actuating component further includes a guide groove formed on the outer wall of the threaded cylinder rod, and three circumferentially distributed protrusions are fixed inside the slide, with the inner ends of the protrusions located in the corresponding guide grooves.

[0011] Preferably, the drive assembly includes a slide plate slidably mounted at both ends of a slide rail, a bearing seat fixed to the top of the slide plate, a bearing bracket fixed to the upper end of the bearing seat, and a chuck rotatably mounted on the outer end of the bearing bracket.

[0012] Preferably, the drive assembly further includes a shaft rotatably mounted in a bearing seat, the shaft being fixed to a chuck, a driven pulley being fixed to the end of the shaft, a motor being mounted on the slide plate, a drive pulley being fixed to the output end of the motor, and a belt being installed between the drive pulley and the driven pulley.

[0013] Preferably, the main component further includes linear guide rails mounted at both ends of the bottom of the platform for driving the slide plate to move.

[0014] Preferably, the handwheel surface is covered with a rubber sleeve, and the rubber sleeve has anti-slip texture. Beneficial effects

[0015] This invention provides a dynamic balancing testing device for automotive drive shafts. Compared with existing technologies, it has the following advantages:

[0016] 1. By passing the car drive shaft through the ring seat and fixing both ends with chucks, rotating the handwheel drives the gear ring to rotate. The gear ring drives the threaded bushing to rotate through gears. The threaded bushing drives the threaded cylinder rod to slide along the cavity through gears, causing the threaded cylinder rod to move the dial indicator towards the shaft center, so that the dial indicator probe contacts the car drive shaft. By simultaneously controlling the radial movement of three dial indicators at equal intervals, the contact pressure between the probe and the car drive shaft is kept consistent. Furthermore, by detecting the radial runout of the car drive shaft through three-point contact, the dynamic balance state is fully reflected, which is more reliable than single-point detection.

[0017] 2. The car drive shaft is fixed by a chuck. The output of the motor drives the drive pulley to rotate in conjunction with the belt. The driven pulley drives the fixed car drive shaft to rotate through the shaft and the chuck. The drive assembly is moved horizontally by the linear guide rail. The distance between the two drive assemblies is adjusted to adapt to the length of the car drive shaft. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the drive component in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the execution component in this utility model;

[0022] Figure 5 This is a cross-sectional view of the execution component in this utility model.

[0023] In the diagram: 1. Frame; 2. Detection mechanism; 21. Main component; 211. Platform; 212. Slide rail; 213. Linear guide rail; 22. Drive component; 221. Slide plate; 222. Shaft seat; 223. Shaft bracket; 224. Chuck; 225. Shaft rod; 226. Driven pulley; 227. Motor; 228. Drive pulley; 229. Belt; 23. Actuation component; 231. Slide; 232. Ring seat; 233. Cavity; 234. Threaded bushing; 235. Gear; 236. Threaded cylinder rod; 237. Dial indicator; 238. Handwheel; 239. Gear ring; 2310. Guide groove; 2311. Protruding rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 protection scope of the present utility model.

[0025] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a dynamic balancing testing device for automotive drive shafts, including a frame 1, on which a testing mechanism 2 is mounted for dynamic balancing testing of automotive drive shafts. The testing mechanism 2 includes:

[0026] The main component 21 includes a platform 211 fixed to the top of the frame 1, and a slide rail 212 is installed on the top of the platform 211;

[0027] Drive assembly 22 is disposed at both ends of slide rail 212 and is used to support and drive the vehicle drive shaft;

[0028] The actuator 23 includes a slide block 231 slidably mounted on a slide rail 212. Ring seats 232 are fixed on both sides of the top of the slide block 231. Three circumferentially distributed cavities 233 are opened on the ring seats 232. A threaded bushing 234 is rotatably mounted on the outer end of each cavity 233. A gear 235 is fixed to the outer wall of the threaded bushing 234. A threaded cylinder 236 is slidably mounted through the cavity 233, and the outer wall of the threaded cylinder 236 is threadedly connected to the inner wall of the threaded bushing 234. A dial indicator 237 is installed inside the threaded cylinder 236. A handwheel 238 is rotatably mounted on the outer wall of the slide block 231. A gear ring 239 is fixed on the handwheel 238, and each gear 235 meshes with the gear ring 239 for transmission.

[0029] In this embodiment, after the car drive shaft passes through the ring seat 232 and is fixed at both ends by the chuck 224, the handwheel 238 is rotated to drive the gear ring 239 to rotate. The gear ring 239 drives the threaded bushing 234 to rotate through the gear 235. The threaded bushing 234 drives the threaded cylinder 236 to slide along the cavity 233 through the gear 235. This causes the threaded cylinder 236 to drive the dial indicator 237 to move towards the shaft center, so that the probe of the dial indicator 237 contacts the car drive shaft. By simultaneously controlling the radial movement of the three dial indicators 237 at equal intervals, the contact pressure between the probe and the car drive shaft is kept consistent. Furthermore, the radial runout of the car drive shaft is detected by three-point contact, which comprehensively reflects the dynamic balance state and is more reliable than single-point detection.

[0030] Specifically, the actuator 23 also includes a guide groove 2310 formed on the outer wall of the threaded cylinder 236, and three circumferentially distributed protrusions 2311 are fixed inside the slide 231, with the inner ends of the protrusions 2311 located in the corresponding guide grooves 2310.

[0031] In this embodiment, the threaded cylinder 236 is restricted by the protrusion 2311 and the guide groove 2310, so that it can only move axially and cannot rotate.

[0032] Specifically, the drive assembly 22 includes a slide plate 221 that is slidably mounted on both ends of the slide rail 212. A bearing seat 222 is fixed on the top of the slide plate 221. A bearing bracket 223 is fixed on the upper end of the bearing seat 222. A chuck 224 is rotatably mounted on the outer end of the bearing bracket 223.

[0033] In this embodiment, both ends of the vehicle drive shaft can be fixed by chuck 224.

[0034] Specifically, the drive assembly 22 also includes a shaft 225 rotatably mounted in the shaft seat 222, and the shaft 225 is fixed to the chuck 224. A driven pulley 226 is fixed to the end of the shaft 225. A motor 227 is mounted on the slide plate 221. A drive pulley 228 is fixed to the output end of the motor 227, and a belt 229 is installed between the drive pulley 228 and the driven pulley 226.

[0035] In this embodiment, the output end of the motor 227 drives the driving pulley 228 to rotate in conjunction with the belt 229, which in turn drives the driven pulley 226 to rotate. The driven pulley 226 rotates in conjunction with the shaft 225 and the chuck 224, which clamps and fixes the car drive shaft.

[0036] Specifically, the main component 21 also includes linear guide rails 213 installed at both ends of the bottom of the platform 211 and used to drive the slide 221 to move.

[0037] In this embodiment, the drive assembly 22 is controlled to move horizontally as a whole by the linear guide rail 213, and the distance between the two drive assemblies 22 is adjusted so as to adapt to the length of the car drive shaft.

[0038] Specifically, the surface of handwheel 238 is covered with a rubber sleeve, and the rubber sleeve has anti-slip texture.

[0039] In this embodiment, by increasing friction and buffering effect, the operator can ensure that the dial indicator 237 can be adjusted stably and accurately.

[0040] The working principle and usage process of this utility model are as follows: First, the drive assembly 22 is moved horizontally as a whole by the linear guide rail 213, and the distance between the two drive assemblies 22 is adjusted to adapt to the length of the car drive shaft; then the car drive shaft is passed through the ring seat 232 and the two ends are fixed by the chuck 224.

[0041] Then, by passing the car drive shaft through the ring seat 232 and fixing both ends with the chuck 224, the gear ring 239 is rotated by rotating the handwheel 238. The gear ring 239 drives the threaded bushing 234 to rotate through the gear 235. The threaded bushing 234 drives the threaded cylinder 236 to slide along the cavity 233 through the gear 235. This causes the threaded cylinder 236 to move the dial indicator 237 toward the shaft center, so that the probe of the dial indicator 237 contacts the car drive shaft.

[0042] Finally, the output of the motor 227 drives the drive pulley 228 to rotate in conjunction with the belt 229, which in turn drives the driven pulley 226 to rotate. The driven pulley 226 rotates in conjunction with the chuck 224 via the shaft 225, which in turn drives the fixed car drive shaft to rotate. The actuator 23 is moved to perform a balance test on the car drive shaft.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting dynamic balance of an automotive drive shaft, comprising a frame (1), characterized in that: The rack (1) is provided with a detection mechanism (2) and is used for automobile transmission shaft dynamic balance detection. The main body assembly (21) comprises a table plate (211) fixed on the top of the rack (1), and a sliding rail (212) is installed on the top of the table plate (211); The driving assembly (22) is arranged at both ends of the sliding rail (212) and is used for supporting and driving the automobile transmission shaft; The execution assembly (23) comprises a sliding seat (231) slidingly installed on the sliding rail (212), and ring seats (232) are fixed on both sides of the top of the sliding seat (231); three cavity holes (233) are arranged in a circumferential direction on the ring seats (232); threaded shaft sleeves (234) are rotatably installed at the outer ends of the cavity holes (233); gears (235) are fixed on the outer walls of the threaded shaft sleeves (234); threaded cylinder rods (236) are slidingly installed in the cavity holes (233) and are in threaded connection with the inner walls of the threaded shaft sleeves (234); micrometers (237) are installed in the threaded cylinder rods (236); hand wheels (238) are rotatably installed on the outer walls of the sliding seat (231); gear rings (239) are fixed on the hand wheels (238); and each gear (235) is in meshing transmission with the gear ring (239).

2. The device for detecting dynamic balance of a drive shaft of an automobile according to claim 1, wherein: The execution assembly (23) further comprises guide grooves (2310) formed in the outer walls of the threaded cylinder rods (236), and three protruding rods (2311) are fixed in the sliding seat (231) in a circumferential direction, and the inner ends of the protruding rods (2311) are located in the corresponding guide grooves (2310).

3. The device for dynamic balance detection of a drive shaft of an automobile according to claim 1, characterized in that: The driving assembly (22) comprises a sliding plate (221) slidingly installed at both ends of the sliding rail (212), an axle seat (222) is fixed on the top of the sliding plate (221), an axle support (223) is fixed on the upper end of the axle seat (222), and a chuck (224) is rotatably installed at the outer end of the axle support (223).

4. The dynamic balancing detection device for automobile transmission shaft according to claim 3, characterized in that: The driving assembly (22) further comprises an axle rod (225) rotatably installed in the axle seat (222), the axle rod (225) is fixed with the chuck (224), a driven pulley (226) is fixed on the end of the axle rod (225), a motor (227) is installed on the sliding plate (221), a driving pulley (228) is fixed on the output end of the motor (227), and a belt (229) is installed between the driving pulley (228) and the driven pulley (226).

5. The device for dynamic balancing of a drive shaft of a vehicle according to claim 1, characterized in that: The main body assembly (21) further comprises linear guides (213) installed at both ends of the bottom of the table plate (211) and used for driving the sliding plate (221) to move.

6. The device for dynamic balancing of a drive shaft of a vehicle according to claim 1, characterized in that: The surface of the hand wheel (238) is covered with a rubber layer, and the rubber layer is provided with anti-skid lines.

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