Testing device for shaft type torque loading test

Abstract

The utility model discloses a testing device used for a shaft type torque loading test, which comprises a driving motor and a reduction gearbox, an output shaft of the reduction gearbox is connected with one end of a left coupling, and one end of a left clamping device penetrates through a left bearing seat and is connected with the other end of the left coupling; one end of the right clamping device penetrates through the right bearing seat to be connected with one end of the first right coupler, one end of the sensor is connected with the other end of the first right coupler, the other end of the sensor is connected with one end of the second right coupler, and an output shaft of the load disc is connected with the other end of the second right coupler. The clamping device is simple in structure, safe, reliable and easy to disassemble and assemble, meanwhile, the adjustable range of the clamping device is large, the load section can move for a long distance by adjusting the mounting base, and the clamping device can adapt to loading tests of test pieces with different diameters and lengths; the problems that the performance of test equipment is insufficient, a test piece freely stretches in the axis direction in the rotating process, and the application range of the test device is small are solved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical testing technology, specifically relating to a test device for shaft torque loading testing. Background Technology

[0002] In recent years, people have paid increasing attention to the reliability and safety of connecting components and equipment. For mature mechanical components, accelerated life tests are also conducted on connecting components to verify the safety and reliability of the connecting parts in order to ensure safer and more reliable operation.

[0003] Reliability testing is used to simulate the operating conditions of a physical product throughout its entire lifespan. Since it is impossible to truly reproduce the operating conditions, accelerated testing methods are often used to replace the operation of a physical product over several years or even decades with a shorter testing time. This allows for the analysis of the product's performance and serves as a supplementary basis for the safe and reliable operation of the product in the future.

[0004] In reliability testing of shaft connection performance, for shaft torque loading tests requiring over one million cycles, the following problems are often found:

[0005] 1) During the loading test, too many repeated loading cycles and large vibrations caused by the rotation of the test piece make it difficult for the testing equipment to meet the test cycle requirements.

[0006] 2) To realistically simulate the current state of the connecting components, the parts should be able to freely expand and contract axially during rotation, which conventional testing mechanisms cannot guarantee.

[0007] 3) Existing testing equipment has poor adaptability to different types of test pieces (with large variations in diameter and length), often requiring structural redesign to meet the requirements, which is costly. Summary of the Invention

[0008] The purpose of this invention is to solve the above-mentioned technical problems and provide a test device for shaft torque loading testing that is structurally reasonable, safe and reliable, and easy to assemble and disassemble.

[0009] To achieve the above objectives, this utility model provides a test device for shaft torque loading testing, comprising, from left to right, a drive motor, a reduction gearbox connected to the output shaft of the drive motor, a left coupling, a left clamping device, a right clamping device, a right first coupling, and a load disk. The output shaft of the reduction gearbox is connected to one end of the left coupling, and one end of the left clamping device passes through the left bearing seat and is connected to the other end of the left coupling. It also includes a sensor and a right second coupling. One end of the right clamping device passes through the right bearing seat and is connected to one end of the right first coupling, one end of the sensor is connected to the other end of the right first coupling, the other end of the sensor is connected to one end of the right second coupling, and the output shaft of the load disk is connected to the other end of the right second coupling.

[0010] Furthermore, the left coupling, the first right coupling, and the second right coupling all have the same structure. The outer circular walls of the connecting holes at both ends of the coupling have axial openings, and radial connecting bolt holes for bolts to pass through are opened around the axial openings on the outer circular walls of the connecting holes at both ends.

[0011] Furthermore, the inner diameter of the connecting holes at both ends of the coupling is slightly larger than the outer diameter of the shaft connected to the connecting holes.

[0012] Furthermore, the left clamping device and the right clamping device have the same structure, both including a half-connecting shaft and a chuck seat fitted on the half-connecting shaft. The chuck seat is evenly provided with multiple jaws along the circumference. The jaws are inserted into a fixed retaining ring via a connecting fixing block. The end of the fixed retaining ring is fitted onto the end of the sample piece. A fixed limiting block and a guide block located between the fixed limiting block and the chuck seat are fitted on the half-connecting shaft. The guide block and the half-connecting shaft are fitted with a keyway. The half-connecting shaft of the left clamping device passes through the left bearing seat and connects to the other end of the left coupling. The half-connecting shaft of the right clamping device passes through the right bearing seat and connects to one end of the right coupling.

[0013] Furthermore, the width of the guide block is greater than the width of the keyway, so that there is a gap between the keyway and the fixed limiting blocks and chuck seat on both sides, and an elastic element is installed in the gap.

[0014] Furthermore, the front and rear end faces of the guide block are positioned with the fixed limiting block and the chuck seat respectively through the stop.

[0015] Furthermore, the fixing ring is a split structure, consisting of an upper split ring and a lower split ring connected by bolts; the fixing ring is provided with a plurality of fixing ring recesses evenly distributed along its circumference, and the lower end of the connecting fixing block is provided with a connecting fixing block protrusion that is inserted into the fixing ring recesses.

[0016] Furthermore, one side of the connecting fixing block is provided with a connecting fixing block recess that corresponds to the claw for insertion.

[0017] Furthermore, it also includes a drive section mounting base, a load section mounting base, and a platform. The gearbox and the left bearing housing are arranged on the drive section mounting base, the load plate and the right bearing housing are arranged on the load section mounting base, and the drive section mounting base and the load section mounting base are arranged on the platform.

[0018] Furthermore, it also includes an adjustment mounting base, on which the load section mounting base is arranged.

[0019] To address the problems existing in the background technology, the inventors made the following improvements:

[0020] 1) The outer circular walls of the connecting holes at both ends of the coupling have axial openings, and radial connecting bolt holes for bolts to pass through are opened around the axial openings on the outer circular walls of the connecting holes at both ends; at the same time, the inner diameter of the connecting holes at both ends of the coupling is slightly larger than the outer diameter of the shaft connected to the connecting holes; compared with conventional keyway installation, in this embodiment, since the inner diameter of the connecting holes is slightly larger than that of the shaft, and there is no need to consider the orientation of the keyway and key and the repair installation, the installation is convenient, the installation difficulty is reduced, and the installation efficiency can be increased by more than 50%. At the same time, since it is a surface contact, the torque transmission capability is stronger.

[0021] 2) The shaft system of the test piece is transferred to the clamping devices at both ends. The clamping devices are connected and clamped to the test piece. The clamping devices can extend and retract with the axial direction of the test piece and slide along the clamping devices without affecting the rotation of the test piece.

[0022] 3) The test piece is located between two clamping devices. The test piece has a large self-weight and will vibrate and shake during high-speed rotation, affecting the stability of the entire test device. Therefore, in order to reduce the impact of the test piece's self-weight on the test, the drive motor is installed on the side end face of the gearbox, a large-weight load plate is set, and the load plate is installed at the end of the test device axis. The self-weight of the drive motor and the load plate offsets and balances the weight of the test piece, which can effectively improve the stress conditions of the left coupling, bearing housing, right first coupling and right second coupling in this practical device. At the same time, when the loading device rotates, the load plate can make the test device run smoothly, reduce shaking and vibration, and greatly improve the service life of each test component.

[0023] 4) The sensor is connected in series at the rear end of the test piece and rotates synchronously with it. When changing to different models of test pieces, since the sensor is not directly connected to the test piece, as long as the dynamic torque measurement (sensor) test range is appropriate, there is no need to disassemble or replace the sensor, thus improving measurement efficiency and reducing measurement deviation.

[0024] 5) The clamping device is designed with a retaining ring, which is fitted onto the thin-walled part. The clamping force of the jaws is distributed through the retaining ring to form a uniform annular fastening force, which enhances the local strength of the thin-walled test piece and can withstand a larger clamping force from the jaws. It further increases the friction between the retaining ring and the thin-walled test piece, preventing loosening or slippage of the clamping part during the test. It also avoids the problem of local deformation of the thin-walled part caused by excessive local locking force due to direct clamping of the jaws. The retaining ring is preferably a half-ring structure, and the upper and lower half-rings can be locked with bolts. The jaws are connected to the retaining ring through a stop joint via a connecting fixing block, which facilitates disassembly and positioning and improves test efficiency.

[0025] 6) The guide block of the clamping device is provided with a keyway that matches the half-connecting shaft. When the half-connecting shaft is driven to rotate by external force, the torque is transmitted through the keyway, so that the guide block rotates synchronously. When the speed of the half-connecting shaft changes or rotates in the opposite direction, the keyway connection can perfectly adapt to the torque change and transmit it synchronously. When the guide block rotates, it can slide on the keyway of the half-connecting shaft, flexibly adapting to the situation of free expansion and contraction of the axis direction of the test piece during rotation under alternating loading conditions.

[0026] 7) The front and rear end faces of the guide block of the clamping device are respectively positioned with the fixed limiting block and the chuck seat through the stop, and the three are fixed as one piece. They can rotate and slide freely with the guide block. Since the width of the guide block is greater than the width of the keyway, there is a gap between the keyway and the fixed limiting blocks and the chuck seat on both sides. The existence of the gap not only meets the space requirement for the guide block to slide on the keyway, but also cleverly limits the sliding distance of the guide block in both directions to prevent the guide block from coming off the half connecting shaft. Furthermore, an elastic element is installed in the gap. When the force that causes the guide block to shift disappears, it can be reset under the action of the elastic element.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] 1) This utility model has a simple structure, is safe and reliable, and is easy to assemble and disassemble. At the same time, the clamping device has a large adjustable range, and the load section can be moved a long distance by adjusting the mounting base. It can adapt to test pieces of different diameters and lengths for loading tests. It solves the problems of insufficient performance of ultra-high frequency testing equipment, free expansion and contraction of test pieces in the axial direction during rotation, and small adaptability of testing devices. The loading device of this utility model has been verified by our company through long-term experiments. It has a reasonable structure, is safe and reliable, and the test pieces are easy to assemble and disassemble. It can meet the torque loading test requirements of multiple types of shafts.

[0029] 2) Since the sensor is not directly connected to the test piece, as long as the dynamic torque measurement range is appropriate, there is no need to disassemble or replace the sensor, which improves measurement efficiency and reduces measurement deviation.

[0030] 3) The clamping device of this utility model solves the problems of free expansion and contraction of the axial direction of the test piece during rotation under alternating loading conditions, easy deformation of thin test piece walls, and easy loosening and slippage of the chuck. The clamping device has a simple structure, reliable performance and wide range of applications. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the test device for shaft torque loading testing according to this utility model;

[0032] Figure 2 for Figure 1 Schematic diagram of the clamping device structure;

[0033] Figure 3 for Figure 2 Schematic diagram of the fixed retaining ring structure;

[0034] Figure 4 for Figure 2 Partial schematic diagram of AA;

[0035] Figure 5 for Figure 2 Partial schematic diagram of BB in the middle;

[0036] Figure 6 for Figure 2 Connect the positioning block in the main view;

[0037] Figure 7 for Figure 2 Usage status diagram;

[0038] Figure 8 for Figure 1 Partial schematic diagram of the coupling.

[0039] Among them, a-left clamping device, b-right clamping device, 1-half connecting shaft, 2-fixed limiting block, 3-guide block, 4-chuck seat, 5-jaw chuck, 5-1-jaw chuck protruding stop, 6-connecting fixing block, 6-1-fixing screw hole, 6-2-connecting fixing block recessed stop, 6-3-connecting fixing block protruding stop, 7-test piece, 8-fixing retaining ring, 8-1-upper half ring, 8-2-lower half ring, 8-3-fixing retaining ring recessed stop, 9- - Elastic element, 10- Keyway, 11- Clearance, 12- Drive motor, 13- Drive section mounting base, 14- Gearbox, 15- Left coupling, 16- Left bearing housing, 17- Right first coupling, 18- Sensor, 19- Right second coupling, 20- Load plate, 21- Load section mounting base, 22- Adjustment mounting base, 23- Platform, 24- Right bearing housing, 25- Axial opening, 26- Connecting hole, 27- Radial connecting bolt hole. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1The test apparatus shown for shaft torque loading testing includes, from left to right, a drive motor 12, a reduction gearbox 14 connected to the output shaft of the drive motor 12, a left coupling 15, a left bearing housing 16, a left clamping device a, a right clamping device b, a right bearing housing 24, a right first coupling 17, a sensor 18, a right second coupling 19, and a load plate 20; it also includes a drive section mounting base 13, a load section mounting base 21, an adjusting mounting base 22, and a platform 23. The reduction gearbox 14 and the left bearing housing 16 are arranged on the drive section mounting base 13, the load plate 20 and the right bearing housing 24 are arranged on the load section mounting base 21, the load section mounting base 21 is arranged on the adjusting mounting base 22, and the drive section mounting base 13 and the adjusting mounting base 22 are arranged on the platform 23.

[0042] In this embodiment, the left clamping device a and the right clamping device b have the same structure, see [link]. Figure 2 It includes a half-connecting shaft 1, and a fixed limiting block 2, a guide block 3 and a chuck seat 4 sequentially mounted on the half-connecting shaft 1. The chuck seat 4 is provided with multiple claws 5 evenly distributed in the circumferential direction (3 in this embodiment). The extension and retraction positions of the claws 5 are adjustable. For example, multiple claws 5 can be moved synchronously through a gear transmission mechanism, which is suitable for products of different specifications. The claws 5 are connected to the fixed ring 8 via the connecting and fixing block 6.

[0043] The output shaft of the gearbox 14 is connected to one end of the left coupling 15. The half-connecting shaft 1 of the left clamping device a passes through the left bearing seat 16 and connects to the other end of the left coupling 15. The half-connecting shaft 1 of the right clamping device b passes through the right bearing seat 24 and connects to one end of the right first coupling 17. One end of the sensor 18 is connected to the other end of the right first coupling 17, and the other end of the sensor 18 is connected to one end of the right second coupling 19. The output shaft of the load disk 20 is connected to the other end of the right second coupling 19. The shaft system of the test piece 7 is telescopically transferred to the clamping devices at both ends. The clamping devices are connected and clamped to the test piece 7. The clamping devices can extend and retract axially with the test piece 7 and slide along the clamping devices without affecting the rotation of the test piece.

[0044] Sensor 18 is connected in series at the rear end of test piece 7 and rotates synchronously with test piece 7. When changing to different models of test piece 7, since sensor 18 is not directly connected to test piece 7, as long as the dynamic torque measurement range is appropriate, there is no need to disassemble or replace sensor 18, which improves measurement efficiency and reduces measurement deviation.

[0045] The test piece 7 is located between the two clamping devices. The test piece 7 has a large self-weight and will vibrate and shake during high-speed rotation, affecting the stability of the entire test device. Therefore, in order to reduce the impact of the self-weight of the test piece 7 on the test, the drive motor 12 is installed on the side end face of the reduction gearbox 14, and a load plate 20 with a large weight is set. The load plate 20 is installed at the end of the axis of the test device. The self-weight of the drive motor 12 and the load plate 20 offsets and balances the weight of the test piece 7, which can effectively improve the stress conditions of the left coupling, bearing housing, right first coupling and right second coupling in this practical device. At the same time, when the loading device rotates, the load plate can make the test device run smoothly, reduce shaking and vibration, and greatly improve the service life of each test component.

[0046] In addition, such as Figure 8 As shown, the left coupling 15, the first right coupling 17, and the second right coupling 19 all have the same structure. Each coupling has an axial opening 25 on the outer wall of its connecting holes 26 at both ends. Radial connecting bolt holes 27 are also formed around the axial openings 25 on the outer walls of the connecting holes 26 at both ends, allowing bolts to pass through. Simultaneously, the inner diameter of the connecting holes 26 at both ends of the coupling is slightly larger than the outer diameter of the shaft connected to the connecting holes. That is, the output shaft of the gearbox is inserted into one end of the connecting hole of the left coupling and locked with bolts, causing the axial opening to shrink, which in turn shrinks the connecting hole, thus firmly fixing the left coupling to the output shaft of the gearbox. Compared to conventional keyway installation, in this embodiment, because the inner diameter of the connecting hole is slightly larger than the shaft, and there is no need to consider the orientation and fitting of the keyway and key, installation is convenient, reducing installation difficulty and increasing installation efficiency by more than 50%. Furthermore, due to surface contact, the torque transmission capacity is stronger. The installation principle of other connecting holes and shafts is the same and will not be described further here.

[0047] In this embodiment, the adjusting mounting base 22 can be driven by a lead screw to move the load section mounting base axially (i.e., in the left-right direction), which is useful for testing test pieces 7 of different lengths and reduces the number of devices used. The adjusting mounting base is a conventional structure, and any mechanical transmission, gear transmission, electric actuator transmission, etc., that can achieve axial movement is acceptable.

[0048] Additionally, see Figure 4 The guide block 3 and the half-connecting shaft 1 are fitted with a keyway 10. When the half-connecting shaft 1 is driven to rotate by an external force, the torque is transmitted through the keyway, causing the guide block 3 to rotate synchronously. Axially, the width of the guide block 3 is greater than the width of the keyway 10, creating a gap 11 between the keyway 10 and the fixed limiting blocks 2 and chuck seat 4 on both sides. An elastic element 9 is installed within the gap 11. Alternatively, the front and rear end faces of the guide block 3 can be positioned with the fixed limiting blocks 2 and chuck seat 4 respectively through stops and fixedly connected by bolts, allowing it to rotate or move axially with the guide block 3.

[0049] See Figure 3The retaining ring 8 can be a split structure, consisting of an upper split ring 8-1 and a lower split ring 8-2 connected by bolts. Multiple retaining ring recesses 8-3 are evenly provided circumferentially along the upper edge of the retaining ring 8 (the specific number corresponds to the retaining claw 5), combined with... Figure 6 The lower end of the connecting and fixing block 6 shown has a connecting and fixing block protrusion 6-3 that corresponds to the retaining ring recess 8-3 and is inserted into it. One side of the connecting and fixing block 6 has a connecting and fixing block recess 6-2 that corresponds to the claw 5 and is inserted into it. The two are also connected by bolts. When the rotation direction or speed changes, the torque can be reliably transmitted through the stop connection.

[0050] Combination Figure 7 As shown, the installation and testing of this utility model device are performed.

[0051] (1) Installation of fixing ring

[0052] The test piece 7 is suspended in the air. The upper half ring 8-1 and the lower half ring 8-2 of the fixing ring 8 are connected into a whole ring with connecting bolts. The fixing ring 8 is fitted onto the outer circle of the end face of the test piece 7. The connecting bolts on the fixing ring 8 are locked to fix the fixing ring 8 to one end of the test piece 7.

[0053] (2) Assemble the clamping device

[0054] The guide block 3 is inserted into the detection area of ​​the semi-connecting shaft 1, and the elastic element 9 is installed into the groove between the guide block 3 and the semi-connecting shaft 1. The fixed limit block 2 and the chuck seat 4 are respectively installed at both ends of the guide block 3 and fixed as a whole with connecting bolts. The chuck 5 is installed on the chuck seat 4, and the clamping range of the chuck 5 is adjusted to the required size through the transmission mechanism (such as gear transmission).

[0055] (3) Test specimen installation

[0056] The test piece 7, along with the retaining ring 8, is hoisted onto the clamping device. The adjustment aligns the jaw 5 with the retaining ring recess 8-3 of the retaining ring 8. The connecting positioning block 6 is then horizontally pushed forward from the retaining ring recess 8-3, ensuring that the end face of the connecting positioning block 6's connecting positioning block protrusion 6-3 is against the end face of the retaining ring recess and that the recess of the connecting positioning block 6 engages with the jaw protrusion 5-1 of the jaw 5 (e.g., ...). Figure 5 As shown in the figure, use bolts to fix the connecting and fixing block 6 onto the claw 5 to complete the installation.

[0057] (4) Installation of other components

[0058] The half-connecting shaft 1 of the left clamping device a passes through the left bearing seat 16 and is connected to one end of the left coupling 15. The other end of the left coupling 15 is connected to the drive motor 12 through the reducer 14. The half-connecting shaft 1 of the right clamping device b passes through the right bearing seat 24 and is connected to one end of the right first coupling 17. The other end of the right first coupling 17 is connected to one end of the sensor 18. The other end of the sensor 18 is connected to the load plate 20 through the right second coupling 19.

[0059] When the rotational speed of the half-connecting shaft 1 changes or rotates in the opposite direction, the keyway 10 can perfectly adapt to the torque change and transmit it synchronously to the guide block 3. When the guide block 3 rotates, it transmits the applied torque to the test piece 7 through the jaws 5, the connecting positioning block 6, and the fixing ring 8, so that the test piece 7 rotates or reverses synchronously.

[0060] During rotation, when the test piece 7 undergoes flexible deformation due to high rotational speed, resulting in elongation or shortening, the axial expansion and contraction force is transmitted through the fixing ring 8 to the connecting positioning block 6 and the claw 5, and finally fed back to the guide block 3. Due to the presence of the gap 11, the guide block 3 can be displaced axially along the keyway of the semi-connecting shaft 1. When the test piece 7 operates smoothly, the deformation disappears, and the guide block 3 returns to normal under the action of the elastic element 9 and the axial force. This allows for free axial expansion and contraction of the thin-walled test piece 7 during the test, simulating actual operating conditions.

[0061] The contact surface between the retaining ring 8 and the test piece 7 is much larger than that of the direct clamping method of the jaws 5. This not only disperses the clamping force of the jaws 5 and prevents the test piece 7 from deforming, but also strengthens the local strength of the test piece 7, allowing it to withstand a greater clamping force from the jaws 5. This further increases the friction between the retaining ring 8 and the test piece 7, preventing the clamping parts from loosening or slipping during the test.

[0062] The test piece 7 is clamped by the left clamping device a and the right clamping device b. The jaws 5 on the clamping devices can be adapted to clamp test pieces 7 of different diameters, and at the same time, the test piece 7 and the loaded test device are at the same rotation center, reducing system deviation during the test.

[0063] After test piece 7 is installed on the testing device, its runout is checked by manual rotation to ensure it meets the requirements. The drive motor is then started, and the motor torque is amplified through the reduction gearbox. The applied torque is transmitted through the left coupling 15 to the half-connecting shaft 1 of the left clamping device a, the jaw 5 of the left clamping device, the test piece 7, the jaw 5 of the right clamping device b, the right first coupling 17, the sensor 18, the right second coupling 19, and the load plate 20. The load plate 20 has a large moment of inertia and, in conjunction with the drive motor, applies the test torque to both ends of the test piece. The sensor rotates synchronously with the test piece 7 and records and feeds back the applied torque data on the test piece 7 in real time. This torque loading must be repeated continuously to reach the required number of test loading cycles, completing millions or even tens of millions of loading tests.

[0064] This utility model features a simple structure, safety, reliability, and ease of assembly and disassembly. The clamping device has a wide adjustable range, and the load section can be moved a considerable distance by adjusting the mounting base, accommodating test specimens of different diameters and lengths for loading tests. It solves the problems of insufficient performance in ultra-high frequency loading testing equipment, free expansion and contraction of the test specimen along its axis during rotation, and limited adaptability of the testing device. This loading device, verified through long-term testing by our company, has a reasonable structure, is safe and reliable, and allows for convenient assembly and disassembly of test specimens, meeting the requirements for torque loading tests on various shaft types. The clamping device of this utility model solves the problems of free expansion and contraction of the test specimen along its axis during rotation under alternating loading conditions, easy deformation of thin-walled test specimens, and easy loosening and slippage of the clamps. This clamping device has a simple structure, reliable performance, and wide applicability.

Claims

1. A test device for shaft torque loading test, comprising, from left to right, a driving motor, a speed reducer connected with the output shaft of the driving motor, a left shaft coupling, a left clamping device, a right clamping device, a right shaft coupling and a load disc, the output shaft of the speed reducer is connected with one end of the left shaft coupling, and one end of the left clamping device is connected with the other end of the left shaft coupling through a left bearing seat; characterized in that: The sensor is connected to the other end of the right first coupling shaft, and the other end of the sensor is connected to one end of the right second coupling shaft.

2. The test device for torque loading test of shafts according to claim 1, characterized in that: The left coupling shaft, the right first coupling shaft and the right second coupling shaft have the same structure, and an axial opening is formed on the outer wall of the two end connecting holes of the coupling shaft, and a radial connecting bolt hole for bolts is formed around the axial opening on the outer wall of the two end connecting holes.

3. The test device for torque loading test of shafts according to claim 2, characterized in that: The inner diameter of the two end connecting holes of the coupling shaft is slightly larger than the outer diameter of the shaft connected to the connecting hole.

4. The test device for torque loading test of shafts according to claim 1, characterized in that: The left clamping device and the right clamping device have the same structure, and each includes a half connecting shaft and a chuck seat sleeved on the half connecting shaft, the chuck seat is uniformly provided with a plurality of clamping claws in the circumferential direction, the clamping claws are inserted and connected with a fixed block and a fixed clamping ring, and the end of the fixed clamping ring is sleeved on the end of the test sample; a fixed limiting block and a guide block between the fixed limiting block and the chuck seat are sleeved on the half connecting shaft, and the guide block is matched with the half connecting shaft by a key groove; the half connecting shaft of the left clamping device is connected to the other end of the left coupling shaft through the left bearing seat, and the half connecting shaft of the right clamping device is connected to one end of the right first coupling shaft through the right bearing seat.

5. The test device for torque loading test of shafts according to claim 4, characterized in that: The width of the guide block is greater than the width of the key groove, so that the key groove has a gap between the fixed limiting block and the chuck seat on both sides, and an elastic member is arranged in the gap.

6. The test device for torque loading test of shafts according to claim 4, characterized in that: The front and rear end faces of the guide block are respectively positioned by a stop opening and a fixed limiting block and a chuck seat.

7. The test device for torque loading test of shafts according to claim 4, characterized in that: The fixed clamping ring is a half structure composed of an upper half ring and a lower half ring connected by bolts; a plurality of fixed clamping ring concave stop openings are uniformly arranged on the fixed clamping ring in the circumferential direction, and the lower end of the connecting fixed block is provided with a connecting fixed block convex stop opening corresponding to the fixed clamping ring concave stop opening.

8. The test device for torque loading test of shafts according to claim 4, characterized in that: One side of the connecting fixed block is provided with a connecting fixed block concave stop opening corresponding to the clamping claw.

9. The test device for torque loading test of shafts according to claim 1, characterized in that: The driving section mounting seat, the load section mounting seat and the platform are further included, the reduction gearbox and the left bearing seat are arranged on the driving section mounting seat, the load disc and the right bearing seat are arranged on the load section mounting seat, and the driving section mounting seat and the load section mounting seat are arranged on the platform.

10. The test device for torque loading test of shafts according to claim 9, characterized in that: The adjusting mounting seat is further included, and the load section mounting seat is arranged on the adjusting mounting seat.

Images