A fatigue testing machine device for automotive drive shafts
By using a combination of laser sensors and laser receivers for deformation detection and a double-layer clamping structure, the shortcomings of transmission shaft fatigue testing machines in terms of detection accuracy, coaxiality, and adaptability have been overcome, achieving efficient and accurate transmission shaft fatigue testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING JIEJIATAI MACHINE MFG CO LTD
- Filing Date
- 2026-03-30
- Publication Date
- 2026-06-09
Smart Images
Figure CN122171200A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive parts testing technology, specifically to an automotive driveshaft fatigue testing machine device. Background Technology
[0002] The driveshaft is a core component of the automotive transmission system, primarily responsible for power transmission. Its fatigue performance directly determines the safety and service life of the entire vehicle. With the rapid development of the automotive industry, passenger and commercial vehicles are increasingly demanding higher requirements for the structural strength, torsional fatigue resistance, and bending fatigue resistance of driveshafts. Driveshaft fatigue testing machines have become crucial equipment in the R&D, production, and testing of automotive components. This type of equipment needs to accurately detect the torsional and bending fatigue of driveshafts, while also having clear industry requirements for clamping stability, ease of assembly and disassembly, and specification compatibility. Accurate deformation detection is key to determining the fatigue limit of the driveshaft; stable clamping ensures that the test conditions closely match actual usage scenarios; and convenient assembly and disassembly are crucial for improving batch testing efficiency. Related testing equipment is developing towards greater precision, efficiency, and multi-specification compatibility.
[0003] The prior art discloses an "Automotive Driveshaft Fatigue Testing Machine (Patent No. CN216717803U)". Although this device realizes the basic function of driveshaft fatigue testing, it has many shortcomings in practical applications: First, it only detects torque changes through a torque sensor and lacks a dedicated deformation detection structure, making it difficult to accurately capture the subtle deformations caused by driveshaft fatigue, resulting in insufficient detection accuracy. Second, the flange-type single-end clamping structure has low clamping fit to the driveshaft, and coaxiality deviations are prone to occur during rotation testing, affecting the authenticity of the test results. Third, the driveshaft connection is adjusted through a linear drive mechanism, and the clamping lacks a synchronous adjustment design. Disassembly and assembly require step-by-step operation of multiple components, and the adaptability to driveshafts of different lengths and specifications is poor. The operation process is cumbersome and significantly reduces the overall efficiency of driveshaft fatigue testing. Summary of the Invention
[0004] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an automotive driveshaft fatigue testing machine, which solves the problems of existing technologies in detecting subtle deformations of driveshafts, large coaxiality deviations during clamping, cumbersome disassembly and assembly, and poor adaptability to driveshafts of different specifications. Technical solution
[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an automotive drive shaft fatigue testing machine device, comprising a bracket, a second fixing plate fixedly connected to the upper left end of the bracket, a first fixing plate fixedly connected to the upper right end of the bracket, a motor fixedly connected to the outer end of the first fixing plate, a cylinder fixedly connected to the outer end of the second fixing plate, a turntable provided inward through the first fixing plate and the second fixing plate through the output end of the motor and the extension end of the cylinder, and a crossbeam fixedly connected to the left and right middle parts of the bracket; An L-shaped frame is provided in the middle of the two crossbeams. The L-shaped frame is threaded with the crossbeams and a positioning bolt is provided. A fixing rod is fixedly connected inside the two L-shaped frames. Several connecting rods are rotatably connected to the fixing rods. A connecting block is fixedly connected to the top of the connecting rods. Sliding grooves are provided at both ends of the connecting blocks. A shaft is slidably connected inside the sliding grooves. A connecting plate is fixedly connected to the outer end of the shaft. A top plate is fixedly connected to the top of the connecting plate. A positioning frame is bolted to the bottom of the inner side of the bracket. Several detection plates are fixedly connected to the top of the positioning frame. Each detection plate corresponds to a connecting rod. A laser emitter is fixedly connected to the bottom of the connecting rod. A mounting groove is opened at the end of the detection plate near the laser emitter. A laser receiver is installed inside the mounting groove. The laser emitter and the laser receiver correspond to each other.
[0006] Preferably, a slot is provided on the upper inner side of the top plate, and a bidirectional screw is rotatably connected inside the slot.
[0007] Preferably, one end of the bidirectional screw is fixedly connected to a handle through a slot, and two clamping plates are threaded onto the bidirectional screw, with a rubber pad fixedly connected to the inner end of each clamping plate.
[0008] Preferably, a mounting platform is fixedly connected to the right side of the bracket, a controller is fixedly connected to the upper end of the mounting platform, and a control cabinet is electrically connected to one side of the controller.
[0009] Preferably, the turntable is internally connected to three main gears, one of which is also fixedly connected to a rotating component at its outer end, and a bevel gear is fixedly connected to the main gear.
[0010] Preferably, the turntable is rotatably connected to three screws inside, and each of the three screws is fixedly connected to a bevel gear two. The bevel gear one and the bevel gear two mesh with each other. The turntable is rotatably connected to a driven gear at the inner center, and the main gear and the driven gear mesh with each other.
[0011] Preferably, the external thread of the screw is fitted with a limiting rod, and the other end of the limiting rod passes through the turntable and is fixedly connected to an arc-shaped plate. The inner end of the arc-shaped plate is fixedly connected to a rubber pad.
[0012] Preferably, the turntable is internally fixedly connected to three limiting frames, and the end of the limiting rod near the second bevel gear is fixedly connected to a limiting plate, which is slidably connected inside the limiting frame. Beneficial effects
[0013] This invention provides a fatigue testing apparatus for automotive driveshafts. It has the following beneficial effects: This invention employs a deformation detection method combining a laser sensor and a laser receiver. Combined with a test structure that drives at one end and fixes at the other, it can accurately capture minute deformations caused by fatigue in the drive shaft. Upon deformation, the laser signal is interrupted, and an alarm is triggered promptly, resulting in fast response and high accuracy. A double-layer clamping structure is also incorporated. At the turntable, a gear-driven arc-shaped plate synchronously and evenly clamps the end of the drive shaft, while a clamping plate at the top provides auxiliary clamping for the middle section of the shaft. Rubber pads provide flexible fixation, ensuring both coaxiality and stability during drive shaft rotation and preventing surface damage from clamping. This allows the fatigue deformation detection results to better reflect actual working conditions.
[0014] The left-end turntable of this invention is driven by a cylinder to achieve horizontal extension and retraction, enabling rapid docking and disengagement with the drive shaft without cumbersome manual disassembly and assembly steps, significantly improving the loading and unloading efficiency of the test. Simultaneously, the L-shaped frame can be flexibly adjusted in position via positioning bolts to accommodate the testing needs of drive shafts of different lengths and specifications. Only a single rotating component inside the turntable needs to be rotated to simultaneously clamp the three arc-shaped plates through gear meshing. The operation is simple and easy to learn, lowering the operational threshold of the test and making the entire fatigue testing process more efficient and flexible. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of an automotive driveshaft fatigue testing machine device proposed in this invention; Figure 2 This is a side view of an automotive driveshaft fatigue testing machine device proposed in this invention; Figure 3 This is a schematic diagram of the testing components of an automotive driveshaft fatigue testing machine device proposed in this invention; Figure 4 This is a schematic diagram of the clamping plate of an automotive driveshaft fatigue testing machine device proposed in this invention; Figure 5 This is a schematic diagram of the internal structure of the turntable of an automotive driveshaft fatigue testing machine device proposed in this invention; Figure 6 The present invention provides a fatigue testing device for automotive drive shafts. Figure 5 A schematic diagram of the structure of A in the middle.
[0016] The components are as follows: 1. Bracket; 2. Crossbeam; 3. Positioning frame; 4. Fixing rod; 5. Connecting rod; 6. Mounting platform; 7. Controller; 8. Motor; 9. Fixing plate one; 10. Top plate; 11. Sliding frame; 12. Fixing plate two; 13. Cylinder; 14. Control cabinet; 15. Clamping plate; 16. Mounting slot; 17. L-shaped frame; 18. Positioning bolt; 19. Handle; 20. Turntable; 21. Arc plate; 22. Rubber pad one; 23. Connecting plate; 24. Slide groove; 25. Connecting block; 26. Limiting frame; 27. Laser emitter; 28. Slot; 29. Bidirectional screw; 30. Driven gear; 31. Rubber pad two; 32. Bevel gear one; 33. Main gear; 34. Limiting rod; 35. Bevel gear two; 36. Screw; 37. Limiting plate. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example
[0018] like Figure 1-6As shown, this embodiment of the invention provides an automotive driveshaft fatigue testing machine device, including a bracket 1. The device is characterized in that: a second fixing plate 12 is fixedly connected to the upper left end of the bracket 1, a first fixing plate 9 is fixedly connected to the upper right end of the bracket 1, a motor 8 is fixedly connected to the outer end of the first fixing plate 9, a cylinder 13 is fixedly connected to the outer end of the second fixing plate 12, a turntable 20 is provided inwardly through the first fixing plate 9 and the second fixing plate 12, and a turntable 20 is fixedly connected to the left and right middle parts of the bracket 1. Crossbeam 2; an L-shaped frame 17 is provided in the middle of the two crossbeams 2. The L-shaped frame 17 is threaded with the crossbeam 2 and a positioning bolt 18 is provided. A fixing rod 4 is fixedly connected inside the two L-shaped frames 17. Several connecting rods 5 are rotatably connected to the fixing rods 4. A connecting block 25 is fixedly connected to the top of the connecting rod 5. Sliding grooves 24 are provided at both ends of the connecting block 25. A shaft is slidably connected inside the sliding groove 24. A connecting plate 23 is fixedly connected to the outer end of the shaft. A top plate 10 is fixedly connected to the top of the connecting plate 23; support 1 A positioning frame 3 is bolted to the bottom of the inner side. Several detection plates are fixedly connected to the top of the positioning frame 3. Each detection plate corresponds to a connecting rod 5. A laser emitter 27 is fixedly connected to the bottom of the connecting rod 5. An installation groove 16 is opened at the end of the detection plate near the laser emitter 27. A laser receiver is installed inside the installation groove 16. The laser emitter 27 corresponds to the laser receiver. The bracket 1 is the basic support structure of the entire device. Fixed plate 9 and fixed plate 12 provide stable fixed support for motor 8 and cylinder 13, respectively. Motor 8 provides rotational power for the fatigue test of the transmission shaft and only drives the right turntable 20 to rotate. Cylinder 13 can drive the left turntable 20 to move horizontally to achieve docking with the left end of the transmission shaft. After docking, the left turntable 20 remains fixed. Through the cooperation of the right turntable rotating and the left turntable fixed, the transmission shaft is driven to rotate to complete the power output of the fatigue test. The two turntables 20 cooperate to clamp and fix the two ends of the transmission shaft to ensure the coaxiality of the transmission shaft during rotation. The crossbeam 2 provides the mounting base for the L-shaped frame 17. The positioning bolts 18 can be tightened or loosened to fix and adjust the position of the L-shaped frame 17 on the crossbeam 2, thereby adjusting the position of the fixing rod 4 and subsequent detection components to adapt to the detection requirements of drive shafts of different lengths and specifications. The connecting rod 5 can rotate freely around the fixing rod 4. The sliding groove 24 on the connecting block 25 slides with the shaft body, which can flexibly adapt to the position and angle changes of the connecting plate 23 caused by the fatigue deformation of the drive shaft, and synchronously drive the connecting rod 5 to rotate around the fixing rod 4. The positioning frame 3 provides fixed support for the detection plate. The laser sensor 27 and the laser receiver correspond one-to-one to form a precise deformation detection component. When the drive shaft deforms due to rotational fatigue, it will drive the top plate 10 and the connecting plate 23 to move, thereby causing the connecting rod 5 to rotate and causing the laser sensor 27 to shift position, resulting in the laser receiver being unable to receive the laser signal, thus realizing the real-time detection of the fatigue deformation of the drive shaft.
[0020] A slot 28 is provided on the upper inner side of the top plate 10. A bidirectional screw 29 is rotatably connected inside the slot 28. The slot 28 provides a suitable installation space for the bidirectional screw 29. The bidirectional screw 29 and the top plate 10 are rotatably connected to ensure the structural stability of the bidirectional screw 29 when rotating inside the slot 28. Moreover, the rotation of the bidirectional screw 29 will not cause displacement of the top plate 10, providing a stable transmission basis for the subsequent movement of the clamping structure. One end of the bidirectional screw 29 passes through the slot 28 and is fixedly connected to a handle 19. Two clamping plates 15 are threaded onto the bidirectional screw 29. A rubber pad 22 is fixedly connected to the inner end of the clamping plate 15. The handle 19 provides a force point for manual drive. Turning the handle 19 can directly drive the bidirectional screw 29 to rotate. The threaded engagement between the bidirectional screw 29 and the two clamping plates 15 can convert the rotational motion of the bidirectional screw 29 into the horizontal linear motion of the clamping plates 15, so that the two clamping plates 15 can move relative to each other or separate, thereby clamping and releasing the drive shaft. The rubber pad 22 is a flexible structure, which can increase the friction between the clamping plates 15 and the drive shaft, improve the clamping stability, and prevent the clamping plates 15 from directly contacting the drive shaft and causing surface extrusion damage.
[0021] A mounting platform 6 is fixedly connected to the right side of the bracket 1. A controller 7 is fixedly connected to the upper end of the mounting platform 6. A control cabinet 14 is electrically connected to one side of the controller 7. The mounting platform 6 provides a horizontal fixed support surface for the controller 7, ensuring the structural stability of the controller 7 after installation. The controller 7 is the control core of the entire device. It is electrically connected to components such as the motor 8, cylinder 13, and laser sensor 27. It can control the speed of the motor 8 and the extension and retraction of the cylinder 13. At the same time, it receives the detection signals from the laser sensor 27 and the laser receiver to realize signal feedback and alarm triggering. The control cabinet 14 provides power supply to all electrical components of the device and realizes centralized control and protection of the circuit. It works with the controller 7 to complete the power and operation control of the entire device.
[0022] The turntable 20 has three main gears 33 rotatably connected inside. One of the main gears 33 is also fixedly connected to a rotating component at its outer end. A bevel gear 32 is fixedly connected to the main gear 33. The three main gears 33 are circumferentially distributed inside the turntable 20 and are rotatably connected to the turntable 20 to ensure the flexibility of the main gears 33 when rotating. The rotating component provides a manual drive point for the operator. Rotating the rotating component can directly drive the corresponding main gear 33 to rotate. The bevel gear 32 is fixedly connected to the main gear 33. The rotation of the main gear 33 can synchronously drive the bevel gear 32 to rotate, realizing the transmission of power and providing a power basis for the clamping of the end of the subsequent transmission shaft.
[0023] Three screws 36 are rotatably connected to the inside of the turntable 20. Each screw 36 is fixedly connected to a bevel gear 35. The bevel gear 32 meshes with the bevel gear 35. A driven gear 30 is rotatably connected to the inner center of the turntable 20. The main gear 33 meshes with the driven gear 30. The three screws 36 correspond one-to-one with the three main gears 33. The screws 36 are arranged laterally inside the turntable 20 to ensure that their direction of movement is parallel to the axis of the transmission shaft. The bevel gear 32 meshes with the bevel gear 35, which can convert the vertical rotational power of the main gear 33 into the horizontal rotational power of the screws 36. The driven gear 30 meshes with all three main gears 33. When one main gear 33 is rotated, the other two main gears 33 can be driven to rotate synchronously through the driven gear 30, thereby realizing the synchronous rotation of the three screws 36, ensuring the synchronous movement of the subsequent clamping structure, and ensuring that the force on the end of the transmission shaft is uniform.
[0024] The external thread of the screw 36 is fitted with a limiting rod 34. The other end of the limiting rod 34 passes through the turntable 20 and is fixedly connected to an arc-shaped plate 21. The inner end of the arc-shaped plate 21 is fixedly connected to a rubber pad 31. The screw 36 and the limiting rod 34 are threaded together, which can convert the rotational motion of the screw 36 into the horizontal linear motion of the limiting rod 34, so that the limiting rod 34 moves closer to or away from the center of the turntable 20 along the axis of the screw 36. The limiting rod 34 drives the arc-shaped plate 21 to move synchronously. The arc-shaped structure of the arc-shaped plate 21 is adapted to the outer circular structure of the end of the transmission shaft, improving the fit with the transmission shaft. The three arc-shaped plates 21 move towards the center synchronously, which can achieve uniform and firm clamping of the end of the transmission shaft. The rubber pad 31 is a flexible structure, which can increase the friction between the arc-shaped plate 21 and the end of the transmission shaft, prevent slippage during the rotation of the transmission shaft, and avoid direct contact between the arc-shaped plate 21 and the transmission shaft, thus preventing surface damage.
[0025] Three limiting frames 26 are fixedly connected inside the turntable 20. A limiting plate 37 is fixedly connected to one end of the limiting rod 34 near the bevel gear 35. The limiting plate 37 is slidably connected inside the limiting frame 26. The three limiting frames 26 correspond one-to-one with the three limiting rods 34. The limiting frame 26 provides space for the sliding guide of the limiting plate 37. The limiting plate 37 is fixedly connected to the limiting rod 34 and slides inside the limiting frame 26. It can limit the movement direction of the limiting rod 34 and prevent the limiting rod 34 from rotating circumferentially with the rotation of the screw 36. It ensures that the limiting rod 34 only makes horizontal linear movement, ensuring that the clamping action of the arc plate 21 is accurate and stable, and avoiding the influence of the coaxiality of the transmission shaft due to the rotation of the limiting rod 34.
[0026] Working principle: When in use, the operator first aligns the car drive shaft with the right turntable 20 to ensure that the drive shaft enters the turntable 20. Then, the cylinder 13 starts and drives the left turntable 20 to move to the right, which mates with the other end of the drive shaft to complete the quick docking of the drive shaft. Then, the rotating parts outside the two turntables 20 are rotated, which drives the first bevel gear 32 to rotate. Under the meshing action, the second bevel gear 35 and the screw 36 rotate. Finally, under the action of the threaded engagement, the three limit rods 34 can drive the arc plate 21 to gradually approach, completing the fixed clamping of both ends of the drive shaft to ensure its stability during fatigue testing. At this point, the L-shaped frame 17 and the fixing rod 4 are quickly installed using the positioning bolts 18, and an appropriate number of testing components are selected. Several clamping plates 15 correspond to the two ends of the drive shaft. Turning the handle 19 drives the internal bidirectional screw 29 to rotate. Under the action of the threaded engagement, the two clamping plates 15 move relative to each other, thus contacting the outside of the drive shaft. Subsequently, the operator controls the operation of the top motor 8 by starting the controller 7. The motor 8 drives the turntable 20 on the right side to rotate to perform fatigue testing on the drive shaft. When the drive shaft deforms during the wear test, the clamping plates 15 can control the rotation of the top plate 10, connecting plate 23 and connecting rod 5 below. When the connecting rod 5 rotates, the laser emitter 27 at the bottom of the connecting rod 5 will deviate. The laser receiver inside the mounting slot 16 will not receive the signal and will issue an alarm through the controller 7 to remind the operator that the car drive shaft has reached the fatigue level, thus enabling rapid testing.
[0027] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fatigue testing machine for automotive drive shafts, comprising a support (1), characterized in that: A fixing plate two (12) is fixedly connected to the upper left end of the bracket (1), a fixing plate one (9) is fixedly connected to the upper right end of the bracket (1), a motor (8) is fixedly connected to the outer end of the fixing plate one (9), a cylinder (13) is fixedly connected to the outer end of the fixing plate two (12), a turntable (20) is provided inward through the fixing plate one (9) and the fixing plate two (12), and a crossbeam (2) is fixedly connected to the left and right middle parts of the bracket (1). An L-shaped frame (17) is provided in the middle of the two crossbeams (2). The L-shaped frame (17) is threaded with the crossbeam (2) and a positioning bolt (18) is provided. A fixing rod (4) is fixedly connected inside the two L-shaped frames (17). Several connecting rods (5) are rotatably connected to the fixing rod (4). A connecting block (25) is fixedly connected to the top of the connecting rod (5). Sliding grooves (24) are provided at both ends of the connecting block (25). A shaft is slidably connected inside the sliding groove (24). A connecting plate (23) is fixedly connected to the outer end of the shaft. A top plate (10) is fixedly connected to the top of the connecting plate (23). A positioning frame (3) is bolted to the bottom of the inner side of the bracket (1). Several detection plates are fixedly connected to the top of the positioning frame (3). Each detection plate corresponds to the connecting rod (5). A laser emitter (27) is fixedly connected to the bottom of the connecting rod (5). An installation groove (16) is opened at one end of the detection plate near the laser emitter (27). A laser receiver is installed inside the installation groove (16). The laser emitter (27) corresponds to the laser receiver.
2. The fatigue testing machine device for automotive drive shafts according to claim 1, characterized in that: The upper inner side of the top plate (10) is provided with a slot (28), and a bidirectional screw (29) is rotatably connected inside the slot (28).
3. The fatigue testing machine device for automotive drive shafts according to claim 2, characterized in that: One end of the bidirectional screw (29) is fixedly connected to a handle (19) through a slot (28). Two clamping plates (15) are threaded onto the bidirectional screw (29), and a rubber pad (22) is fixedly connected to the inner end of the clamping plate (15).
4. The fatigue testing machine device for automotive drive shafts according to claim 1, characterized in that: An installation platform (6) is fixedly connected to the right side of the bracket (1), and a controller (7) is fixedly connected to the upper end of the installation platform (6). A control cabinet (14) is electrically connected to one side of the controller (7).
5. The fatigue testing machine device for automotive drive shafts according to claim 1, characterized in that: The turntable (20) is internally connected to three main gears (33), and one of the main gears (33) is also fixedly connected to a rotating component at its outer end. A bevel gear (32) is fixedly connected to the main gear (33).
6. The fatigue testing machine device for automotive drive shafts according to claim 5, characterized in that: The turntable (20) is rotatably connected to three screws (36) inside. Each of the three screws (36) is fixedly connected to a bevel gear (35). The bevel gear (32) meshes with the bevel gear (35). The turntable (20) is rotatably connected to a driven gear (30) on the inner middle side. The main gear (33) meshes with the driven gear (30).
7. The fatigue testing machine apparatus for automotive drive shafts according to claim 6, characterized in that: The screw (36) has an external thread that engages with a limiting rod (34). The other end of the limiting rod (34) passes through the turntable (20) and is fixedly connected to an arc plate (21). The inner end of the arc plate (21) is fixedly connected to a rubber pad (31).
8. The fatigue testing machine apparatus for automotive drive shafts according to claim 7, characterized in that: The turntable (20) is internally fixedly connected to three limiting frames (26). The end of the limiting rod (34) near the bevel gear (35) is fixedly connected to a limiting plate (37), and the limiting plate (37) is slidably connected inside the limiting frame (26).