A test bench with adjustable rotation direction and angle transmission device

Abstract

The utility model relates to a kind of test bench with adjustable direction and angle transmission device, it is related to transmission test platform technical field.To solve the existing test bench cannot simultaneously compatible to the angle and direction adjustment test of aviation bevel gear and helicopter main reduction test bench, can only separately to aviation bevel gear or helicopter main reduction test bench adjustment test, leading to poor universality, larger size, occupy a large amount of test space, and the precision of input and output angle adjustment in existing test bench is lower, in turn leading to the test data has greater error problem.The whole device structure is compact, reliable in performance, can realize the accurate adjustment of rotation angle, and can be locked and positioned at any angle, while the direction of input and output end can realize four combination forms, improve the compatibility of aviation bevel gear, helicopter main reduction test bench and other test benches that need angle and direction adjustment, in turn improve the universality of the device.The utility model is suitable for transmission test platform technical field.

Description

Technical Field

[0001] This invention relates to the field of transmission test platform technology, specifically to a transmission device for a test bench with adjustable rotation direction and angle. Background Technology

[0002] Important transmission components such as aircraft accessory gearboxes and helicopter main reducers require testing according to relevant requirements at every stage, including equipment development, product delivery, maintenance, and life assessment. Transmission test benches can perform tests on transmission components such as aircraft gearboxes under different torque-speed conditions, and can complete tests such as break-in and fatigue life determination. Therefore, transmission test benches are a crucial testing technology guarantee for the research and development and production of transmission components.

[0003] Currently, my country's aviation and aerospace industries are booming, with numerous new models under development. To reduce the construction cost and time of test benches, higher requirements are placed on their compatibility. Test benches must be able to be quickly modified and switched within limited space through compatibility design to meet the testing conditions of different product models. In particular, for transmission devices with bevel gear drives, such as aviation accessory gearboxes and helicopter main reducers, the angle and direction of rotation of the bevel gear transmission units often change due to different main unit layouts. To adapt to the different angles and directions of rotation of the test pieces, multiple auxiliary gearboxes are required, occupying a large space, resulting in high modification costs and long cycles, failing to meet the overall cycle requirements of the test pieces. There is an urgent need for a transmission device for test benches with adjustable rotation and angle, capable of switching between different input and output angles and directions of rotation without adding auxiliary gearboxes, and achieving precise angle adjustment and stable positioning.

[0004] Chinese patent number CN201921291312.7 provides a common rail pump test bench with a movable function. The invention achieves the linear movement of the screw sleeve by the relative rotation of the screw rod and the screw sleeve through the cooperation of the screw rod and the screw sleeve. The screw rod is driven to rotate by a motor, and the rotation of the screw sleeve is restricted by the constraint and the test bench is connected to the screw sleeve to achieve the linear movement of the test bench. Chinese patent number CN201711479571.8 provides a multi-functional test bench. The invention achieves the height adjustment of the test bench surface by the cooperation of the lead screw and the slider, and achieves the rotation of the test bench surface at different angles by manually rotating the turntable according to the scale on the turntable surface. However, this invention is only suitable for conditions where the turntable mass is small and the required precision is not high. Determining the rotation angle by the reading of the edge scale is obviously not as accurate as that of electronic equipment such as angle encoders.

[0005] Chinese patent number CN202022470190.7 discloses a composite hinge for a rotatable test bench. The invention uses four connecting blocks arranged symmetrically and perpendicularly to different planes in two pairs. Rotation of one set of connecting blocks allows the test bench, which is fixed to it, to rotate in the X and Y directions, thus adjusting the spatial attitude of the test bench. However, this invention cannot effectively and precisely control the rotation angle of the test bench and cannot be applied to rotation in the Z direction. Currently, there are no reliable designs or research reports on transmission devices with variable rotation direction at the output end of the gearbox for large test benches, which also have a locking function and allow for precise Z-axis rotation.

[0006] In summary, the existing test benches cannot simultaneously perform angle and rotation adjustment tests on both aircraft bevel gears and helicopter main reduction test benches. They can only perform adjustment tests on either aircraft bevel gears or helicopter main reduction test benches separately, resulting in poor versatility, large size, and a significant amount of test space being occupied. Furthermore, the input and output angle adjustment precision of the existing test benches is relatively low, leading to significant errors in the test data. Summary of the Invention

[0007] This invention addresses the problem that existing test benches cannot simultaneously perform angle and rotation direction adjustments for both aircraft bevel gears and helicopter main reduction test benches. Instead, they can only perform adjustment tests on either aircraft bevel gear or helicopter main reduction test bench separately, resulting in poor versatility, large size, and significant space occupation. Furthermore, the input and output angle adjustments in existing test benches are not very precise, leading to large errors in the test data. Therefore, this invention proposes a rotation and angle adjustable transmission device for test benches.

[0008] The present invention provides a test bench with adjustable rotation direction and angle transmission device, which comprises a drive turntable 10 and two steering units.

[0009] A steering unit is provided at each end of the upper surface of the drive turntable 10, and the output end of the drive turntable 10 is connected to the drive end of the steering unit.

[0010] The drive turntable 10 includes a frame, a driven gear 11, a main shaft 12, a main gear 13, and an output shaft 14. The main shaft 12 is located in the middle of the frame, and the end of the main shaft 12 is rotatably connected to the frame. The main shaft 12 is equipped with a main gear 13. Each end of the frame is equipped with an output shaft 14, and the end of the output shaft 14 is rotatably connected to the frame. Each output shaft 14 is equipped with a driven gear 11, and the driven gear 11 is meshed with the main gear 13. The top end of each output shaft 14 is connected to the drive end of the steering unit through a coupling.

[0011] Furthermore, the steering unit includes a rotating mechanism 20, a rotating locking mechanism 30, and an upper parallel shaft gearbox 40; the upper surface of the rotating mechanism 20 is provided with the rotating locking mechanism 30, and the output end of the rotating mechanism 20 is connected to the input end of the upper parallel shaft gearbox 40.

[0012] Furthermore, the rotating mechanism 20 includes an inner ring 21 of the turntable, a bearing 22, an outer worm gear ring 23 of the turntable, a drive motor 24, and a worm 25;

[0013] The lower surface of the inner ring 21 of the turntable is positioned with the upper surface of the drive turntable 10 by means of a stop fit, and the inner ring 21 of the turntable is fixedly connected to the upper surface of the drive turntable 10 by bolts. The outer circumferential surface of the inner ring 21 of the turntable is fitted with a bearing 22, and the outer ring of the bearing 22 is fitted with an outer worm gear ring 23 of the turntable. A drive motor 24 is provided on one side of the upper surface of the drive turntable 10. The output end of the drive motor 24 is connected to one end of the worm 25 through a coupling. The worm 25 is connected to the outer worm gear ring 23 of the turntable.

[0014] Furthermore, the rotary locking mechanism 30 includes an outer locking ring 31 of the turntable, a first positioning pin 32, an inner locking ring 33 of the turntable, a second positioning pin 34, and an OK clip 35;

[0015] The outer locking ring 31 of the turntable is coaxially arranged with the outer worm gear ring 23 of the turntable, and the bottom of the outer locking ring 31 is positioned and connected to the upper surface of the drive turntable 10 through a positioning pin 32. An inner locking ring 33 is provided inside the outer locking ring 31, and the inner locking ring 33 is rotatably connected to the outer locking ring 31. An annular boss is provided at the lower end of the inner surface of the outer locking ring 31. Multiple countersunk holes are evenly provided along the circumference on the upper surface of the annular boss. A through hole is machined on the upper surface of the inner locking ring 33. The inner part is provided with a second positioning pin 34. The bottom of the second positioning pin 34 is inserted into the interior of one of the countersunk holes on the annular boss inside the outer locking ring 31 of the turntable. The inner wall of the inner locking ring 33 of the turntable is fixedly connected to the middle of the outer surface of the upper parallel shaft gearbox 40. The upper surface of the inner locking ring 33 of the turntable is uniformly machined with n square countersunk holes along the circumferential direction, where n is a positive integer. Each square countersunk hole is provided with an OK clip 35 inside. The OK clip 35 is fixedly connected to the inner bottom surface of the square countersunk hole on the inner locking ring 33 of the turntable by bolts.

[0016] Furthermore, the number n of square countersunk holes on the inner locking ring 33 of the turntable is 8≤n≤20;

[0017] Furthermore, the upper parallel shaft gearbox 40 includes a housing, a driven bevel gear 41, a main shaft 42, a flange 43, and a driving bevel gear 44;

[0018] The housing has a horizontal main shaft 42 inside, and both ends of the main shaft 42 pass through the outer wall of the housing. Each end of the main shaft 42 is provided with a flange 43. The main shaft 42 is provided with a driven bevel gear 41, which is located inside the housing. The lower surface of the housing has an output end hole in the middle, and a drive shaft is provided in the output end hole. The top end of the drive shaft is fitted with a driving bevel gear 44, which meshes with the driven bevel gear 41. The bottom end of the drive shaft passes through the rotary locking mechanism 30 and the rotary mechanism 20 in sequence, and then is connected to the top end of the output shaft 14 on the drive turntable 10 through a coupling.

[0019] Furthermore, the bottom of the upper parallel shaft gearbox 40 is fixedly connected to the upper surface of the turntable outer worm gear ring 23;

[0020] Furthermore, the outer diameter of the output shaft 14 in the drive turntable 10 is smaller than the outer diameter of the main shaft 12;

[0021] Furthermore, both ends of the main shaft 42 are rotatably connected to the housing;

[0022] Furthermore, during use, the main shaft 12 of the turntable 10 is driven by a motor to rotate. The main shaft 12 is equipped with a main gear 13, and each end of the frame is equipped with an output shaft 14, the end of which is rotatably connected to the frame. Each output shaft 14 is equipped with a driven gear 11, which meshes with the main gear 13, thereby driving the output shaft 14 to rotate, which in turn drives the transmission shaft to rotate. The main shaft 42 is equipped with a driven bevel gear 41, and the top of the transmission shaft is fitted with a driving bevel gear 44, which meshes with the driven bevel gear 41, thus driving the main shaft 42 to rotate.

[0023] When the main shaft 12 of the drive turntable 10 rotates counterclockwise, one end flange 43 of the main shaft 42 inside the upper parallel shaft gearbox 40 of the steering unit rotates clockwise, and the other end flange 43 of the main shaft 42 rotates counterclockwise, so that the output end rotation direction can be selected, that is, the output end rotation direction is adjustable.

[0024] The drive motor 24 rotates, causing the worm gear 25 to rotate. The worm gear drives the turbine, which in turn rotates the outer worm wheel ring 23 of the turntable. The precise angular rotation of the test bench turntable is achieved through the transmission ratio between the angle encoder inside the drive motor 24 and the worm gear transmission mechanism. Since a bearing 22 is fitted onto the outer circumference of the inner ring 21 of the turntable, and the outer ring of the bearing 22 is fitted onto the outer worm wheel ring 23, the inner ring 21 of the turntable is fixedly connected to the drive turntable 10 when the outer worm wheel ring 23 rotates. Furthermore, since the outer worm wheel ring 23 is fixedly connected to the bottom of the upper parallel shaft gearbox 40, the upper parallel... The shaft gearbox 40 rotates together with the outer worm gear ring 23 of the turntable. Similarly, the inner wall of the inner locking ring 33 of the turntable is fixed to the upper parallel shaft gearbox 40 by bolts and also rotates together. Since the inner locking ring 33 of the turntable rotates together, when rotating, the OK clip 35 on the inner locking ring 33 of the turntable and the No. 2 positioning pin 34 inside the through hole on the outer locking ring 31 of the turntable need to be pulled out. After the rotation angle is completed, the OK clip 35 and the No. 2 positioning pin 34 are put back in for positioning and locking. The subsequent rotation can rely on the accuracy of the encoder and the transmission ratio of the worm gear in the drive motor 24 to ensure the accuracy of the rotation angle.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] This invention overcomes the shortcomings of existing technologies. It achieves adjustable rotation direction of the output end through a design scheme where both ends of the output shaft are output ends. Simultaneously, it enables precise angular rotation of large gearbox equipment by driving the worm gear and the combination mechanism of the worm wheel and the outer worm wheel ring of the turntable through a drive motor with an angle encoder. Unlike common hinge structures for adjusting rotation posture and moving mechanisms that use lead screws, sliders, threaded rods, and threaded sleeves, this invention utilizes the combination mechanism of the worm wheel and the outer worm wheel ring of the turntable to achieve rotation of the test bench around the Z direction. Furthermore, the OK clamp pressure causes the locking ring inside the turntable to change, achieving the function of squeezing and locking between the rotating and fixed parts. This allows the main shaft in the upper parallel shaft gearbox to be locked at any angle.

[0027] Furthermore, due to the self-locking characteristic of the worm gear and the outer worm gear ring combination mechanism of the turntable, after the initial positioning pin of the test bench, the worm is first started to eliminate the backlash error in the stroke, and then the positioning pin is released to make the worm rotate in the same direction, thus achieving precise positioning of the turntable rotation angle. The entire test bench has a compact structure, high reliability, and greatly reduces the floor space, thereby saving a lot of test space. It also improves the compatibility of test benches that require angle and rotation direction adjustment, such as aviation bevel gear and helicopter main reduction test bench, thereby improving versatility. Moreover, it is easy to adjust the spindle rotation angle during use, with high adjustment accuracy, thereby reducing test errors and ensuring the accuracy of test data. Attached Figure Description

[0028] Figure 1 This is a main sectional view of a test bench with adjustable rotation direction and angle as described in this invention;

[0029] Figure 2 This is a partial sectional view of a rotation and angle adjustable transmission device for a test bench according to the present invention.

[0030] Figure 3 This is a schematic diagram showing the connection between the OK clamp and the inner locking ring of the turntable in a rotating and angle-adjustable transmission device for a test bench according to the present invention. Detailed Implementation

[0031] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a test bench with adjustable rotation direction and angle, which comprises a drive turntable 10 and two steering units.

[0032] A steering unit is provided at each end of the upper surface of the drive turntable 10, and the output end of the drive turntable 10 is connected to the drive end of the steering unit.

[0033] The drive turntable 10 includes a frame, a driven gear 11, a main shaft 12, a main gear 13, and an output shaft 14. The main shaft 12 is located in the middle of the frame, and the end of the main shaft 12 is rotatably connected to the frame. The main shaft 12 is equipped with a main gear 13. Each end of the frame is equipped with an output shaft 14, and the end of the output shaft 14 is rotatably connected to the frame. Each output shaft 14 is equipped with a driven gear 11, and the driven gear 11 is meshed with the main gear 13. The top end of each output shaft 14 is connected to the drive end of the steering unit through a coupling.

[0034] In this specific embodiment, during use, the main shaft 12 of the turntable 10 is driven by a motor to rotate. The main shaft 12 is equipped with a main gear 13, and each end of the frame is equipped with an output shaft 14, the end of which is rotatably connected to the frame. Each output shaft 14 is equipped with a driven gear 11, which meshes with the main gear 13, thereby driving the output shaft 14 to rotate, which in turn drives the transmission shaft to rotate. The main shaft 42 is equipped with a driven bevel gear 41, and the top of the transmission shaft is fitted with a driving bevel gear 44, which meshes with the driven bevel gear 41, thus driving the main shaft 42 to rotate.

[0035] When the main shaft 12 of the drive turntable 10 rotates counterclockwise, one end flange 43 of the main shaft 42 inside the upper parallel shaft gearbox 40 of the steering unit rotates clockwise, and the other end flange 43 of the main shaft 42 rotates counterclockwise, so that the output end rotation direction can be selected, that is, the output end rotation direction is adjustable.

[0036] The drive motor 24 rotates, causing the worm gear 25 to rotate. The worm gear drives the turbine, which in turn rotates the outer worm wheel ring 23 of the turntable. The precise angular rotation of the test bench turntable is achieved through the transmission ratio between the angle encoder inside the drive motor 24 and the worm gear transmission mechanism. Since a bearing 22 is fitted onto the outer circumference of the inner ring 21 of the turntable, and the outer ring of the bearing 22 is fitted onto the outer worm wheel ring 23, the inner ring 21 of the turntable is fixedly connected to the drive turntable 10 when the outer worm wheel ring 23 rotates. Furthermore, since the outer worm wheel ring 23 is fixedly connected to the bottom of the upper parallel shaft gearbox 40, the upper parallel... The shaft gearbox 40 rotates together with the outer worm gear ring 23 of the turntable. Similarly, the inner wall of the inner locking ring 33 of the turntable is fixed to the upper parallel shaft gearbox 40 by bolts and also rotates together. Since the inner locking ring 33 of the turntable rotates together, when rotating, the OK clip 35 on the inner locking ring 33 of the turntable and the No. 2 positioning pin 34 inside the through hole on the outer locking ring 31 of the turntable need to be pulled out. After the rotation angle is completed, the OK clip 35 and the No. 2 positioning pin 34 are put back in for positioning and locking. The subsequent rotation can rely on the accuracy of the encoder and the transmission ratio of the worm gear in the drive motor 24 to ensure the accuracy of the rotation angle.

[0037] In summary, the adjustable angle and output rotation direction transmission device of this type of test bench can achieve different selections of output rotation direction through different combinations of input and output shafts; the precise angle rotation of the turntable can be achieved through a worm gear and a drive motor with an encoder; the inner locking ring of the turntable can be deformed and pressed and fixed to the outer locking ring of the turntable by the OK clamp, and the inner wall of the inner locking ring 33 of the turntable is fixedly connected to the middle of the outer surface of the upper parallel shaft gearbox 40, so as to achieve reliable locking and positioning of the three. The entire device is compact in structure and reliable in performance. It can achieve precise adjustment of the rotation angle and lock positioning at any angle. At the same time, the input and output ends can rotate in four combinations: clockwise-clockwise, counterclockwise-counterclockwise, clockwise-counterclockwise, and counterclockwise-clockwise. It is a novel and innovative transmission device for test benches. It is suitable for occasions where space is limited and the input and output rotation directions and relative axis angles need to be adjusted. It improves the compatibility of test benches that require angle and rotation adjustment, such as aviation bevel gears and helicopter main reduction test benches, thereby improving the versatility of the device.

[0038] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment further defines the test bench described in Specific Embodiment 1. The test bench described in this embodiment is a rotation and angle adjustable transmission device. The steering unit includes a rotation mechanism 20, a rotation locking mechanism 30, and an upper parallel shaft gearbox 40. The upper surface of the rotation mechanism 20 is provided with the rotation locking mechanism 30, and the output end of the rotation mechanism 20 is connected to the input end of the upper parallel shaft gearbox 40.

[0039] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment further defines the test bench described in Specific Embodiment Two. The test bench in this embodiment is a transmission device with adjustable rotation direction and angle. The rotation mechanism 20 includes an inner ring 21 of the turntable, a bearing 22, an outer worm gear ring 23 of the turntable, a drive motor 24, and a worm 25.

[0040] The lower surface of the inner ring 21 of the turntable is positioned with the upper surface of the drive turntable 10 by means of a stop fit, and the inner ring 21 of the turntable is fixedly connected to the upper surface of the drive turntable 10 by bolts. The outer circumference of the inner ring 21 of the turntable is fitted with a bearing 22, and the outer ring of the bearing 22 is fitted with an outer worm gear ring 23 of the turntable. A drive motor 24 is provided on one side of the upper surface of the drive turntable 10. The output end of the drive motor 24 is connected to one end of the worm 25 through a coupling. The worm 25 is connected to the outer worm gear ring 23 of the turntable.

[0041] Specific implementation method four: Combination Figures 1 to 3 This embodiment further defines the test bench described in Specific Embodiment 3. The test bench described in this embodiment is a rotation direction and angle adjustable transmission device. The rotation locking mechanism 30 includes an outer locking ring 31 of the turntable, a first positioning pin 32, an inner locking ring 33 of the turntable, a second positioning pin 34, and an OK clamp 35.

[0042] The outer locking ring 31 of the turntable is coaxially arranged with the outer worm gear ring 23 of the turntable, and the bottom of the outer locking ring 31 is positioned and connected to the upper surface of the drive turntable 10 through a positioning pin 32. An inner locking ring 33 is provided inside the outer locking ring 31, and the inner locking ring 33 is rotatably connected to the outer locking ring 31. An annular boss is provided at the lower end of the inner surface of the outer locking ring 31. Multiple countersunk holes are evenly provided along the circumference on the upper surface of the annular boss. A through hole is machined on the upper surface of the inner locking ring 33. The inner part is provided with a second positioning pin 34. The bottom of the second positioning pin 34 is inserted into the interior of one of the countersunk holes on the annular boss inside the outer locking ring 31 of the turntable. The inner wall of the inner locking ring 33 of the turntable is fixedly connected to the middle of the outer surface of the upper parallel shaft gearbox 40. The upper surface of the inner locking ring 33 of the turntable is uniformly machined with n square countersunk holes along the circumferential direction, where n is a positive integer. Each square countersunk hole is provided with an OK clip 35 inside. The OK clip 35 is fixedly connected to the inner bottom surface of the square countersunk hole on the inner locking ring 33 of the turntable by bolts.

[0043] In this specific embodiment, this structure is adopted. The pressure of the OK clamp 35 causes the inner locking ring 33 of the turntable to deform, thereby realizing the compression and locking design between the rotating part and the fixed part, so that the outer worm gear ring 23 of the turntable can be locked and fixed at any angle.

[0044] Specific Implementation Method Five: Combining Figures 1 to 3 This embodiment further defines the test bench described in Specific Embodiment 4. In this embodiment, the number n of the square countersunk holes n on the locking ring 33 inside the turntable is 8 ≤ n ≤ 20.

[0045] In this specific embodiment, 8 to 20 square countersunk holes are used, and each square countersunk hole is provided with an OK clip 35 inside, which can improve the locking accuracy.

[0046] Specific Implementation Method Six: Combination Figures 1 to 3 This embodiment further defines the test bench described in Specific Embodiment 4. The test bench with adjustable rotation direction and angle described in this embodiment includes an upper parallel shaft gearbox 40 comprising a housing, a driven bevel gear 41, a main shaft 42, a flange 43, and a driving bevel gear 44.

[0047] The housing has a horizontal main shaft 42 inside, with both ends of the main shaft 42 passing through the outer wall of the housing. Each end of the main shaft 42 has a flange 43. The main shaft 42 is equipped with a driven bevel gear 41, which is located inside the housing. The lower surface of the housing has an output end hole in the middle, and a drive shaft is installed in the output end hole. The top of the drive shaft is fitted with a driving bevel gear 44, which meshes with the driven bevel gear 41. The bottom end of the drive shaft passes through the rotary locking mechanism 30 and the rotary mechanism 20 in sequence, and then is connected to the top end of the output shaft 14 on the drive turntable 10 through a coupling.

[0048] Specific implementation method seven: Combination Figures 1 to 3 This embodiment further defines the test bench described in Specific Embodiment Six. In this embodiment, a test bench with adjustable rotation direction and angle transmission device is provided, wherein the bottom of the upper parallel shaft gearbox 40 is fixedly connected to the upper surface of the outer worm gear ring 23 of the turntable.

[0049] Specific implementation method eight: Combination Figures 1 to 3 This embodiment further defines the test bench described in Specific Embodiment 1. In this embodiment, a test bench with adjustable rotation direction and angle transmission device is provided, wherein the outer diameter of the output shaft 14 in the drive turntable 10 is smaller than the outer diameter of the main shaft 12.

[0050] Specific Implementation Method Nine: Combining Figures 1 to 3 This embodiment further defines the test bench described in Specific Embodiment Six. The test bench described in this embodiment has an adjustable rotation direction and angle transmission device, wherein the two ends of the main shaft 42 are rotatably connected to the housing.

[0051] Working principle

[0052] In use, the main shaft 12 of the turntable 10 is driven by a motor to rotate. The main shaft 12 is equipped with a main gear 13. There is an output shaft 14 at each end of the frame, and the end of the output shaft 14 is rotatably connected to the frame. Each output shaft 14 is equipped with a driven gear 11, and the driven gear 11 meshes with the main gear 13, thereby driving the output shaft 14 to rotate, which in turn drives the transmission shaft to rotate. The main shaft 42 is equipped with a driven bevel gear 41, and the top of the transmission shaft is fitted with a driving bevel gear 44, and the driving bevel gear 44 meshes with the driven bevel gear 41, which drives the main shaft 42 to rotate.

[0053] When the main shaft 12 of the drive turntable 10 rotates counterclockwise, one end flange 43 of the main shaft 42 inside the upper parallel shaft gearbox 40 of the steering unit rotates clockwise, and the other end flange 43 of the main shaft 42 rotates counterclockwise, so that the output end rotation direction can be selected, that is, the output end rotation direction is adjustable.

[0054] The drive motor 24 rotates, causing the worm gear 25 to rotate. The worm gear drives the turbine, which in turn rotates the outer worm wheel ring 23 of the turntable. The precise angular rotation of the test bench turntable is achieved through the transmission ratio between the angle encoder inside the drive motor 24 and the worm gear transmission mechanism. Since a bearing 22 is fitted onto the outer circumference of the inner ring 21 of the turntable, and the outer ring of the bearing 22 is fitted onto the outer worm wheel ring 23, the inner ring 21 of the turntable is fixedly connected to the drive turntable 10 when the outer worm wheel ring 23 rotates. Furthermore, since the outer worm wheel ring 23 is fixedly connected to the bottom of the upper parallel shaft gearbox 40, the upper parallel... The shaft gearbox 40 rotates together with the outer worm gear ring 23 of the turntable. Similarly, the inner wall of the inner locking ring 33 of the turntable is fixed to the upper parallel shaft gearbox 40 by bolts and also rotates together. Since the inner locking ring 33 of the turntable rotates together, when rotating, the OK clip 35 on the inner locking ring 33 of the turntable and the No. 2 positioning pin 34 inside the through hole on the outer locking ring 31 of the turntable need to be pulled out. After the rotation angle is completed, the OK clip 35 and the No. 2 positioning pin 34 are put back in for positioning and locking. The subsequent rotation can rely on the accuracy of the encoder and the transmission ratio of the worm gear in the drive motor 24 to ensure the accuracy of the rotation angle.

Claims

1. A rotation and angle adjustable transmission device for a test bench, characterized in that: It includes a drive turntable (10) and two steering units; A steering unit is provided at each end of the upper surface of the drive turntable (10), and the output end of the drive turntable (10) is connected to the drive end of the steering unit; The drive turntable (10) includes a frame, a driven gear (11), a main shaft (12), a main gear (13), and an output shaft (14). The main shaft (12) is located in the middle of the frame, and the end of the main shaft (12) is rotatably connected to the frame. The main shaft (12) is equipped with a main gear (13). The two ends of the frame are respectively equipped with an output shaft (14), and the end of the output shaft (14) is rotatably connected to the frame. Each output shaft (14) is equipped with a driven gear (11), and the driven gear (11) is meshed with the main gear (13). The top end of each output shaft (14) is connected to the drive end of the steering unit through a coupling. The steering unit includes a rotating mechanism (20), a rotating locking mechanism (30), and an upper parallel shaft gearbox (40); the upper surface of the rotating mechanism (20) is provided with the rotating locking mechanism (30), and the output end of the rotating mechanism (20) is connected to the input end of the upper parallel shaft gearbox (40); the rotating mechanism (20) includes a turntable inner ring (21), a bearing (22), a turntable outer worm gear ring (23), a drive motor (24), and a worm (25); The rotary locking mechanism (30) includes an outer locking ring (31) of the turntable, a first positioning pin (32), an inner locking ring (33) of the turntable, a second positioning pin (34) and an OK clip (35). The outer locking ring (31) of the turntable is coaxially arranged with the outer worm gear ring (23) of the turntable, and the bottom of the outer locking ring (31) is positioned and connected to the upper surface of the drive turntable (10) through a positioning pin (32). The inner locking ring (33) of the turntable is provided inside the outer locking ring (31), and the inner locking ring (33) of the turntable is rotatably connected to the outer locking ring (31). The lower end of the inner part of the outer locking ring (31) of the turntable is provided with an annular boss. The upper surface of the annular boss is provided with multiple countersunk holes evenly arranged along the circumferential direction. The upper surface of the inner locking ring (33) of the turntable is machined with a through hole, and the through hole is... The hole has a No. 2 positioning pin (34) inside. The bottom of the No. 2 positioning pin (34) is inserted into the interior of one of the countersunk holes on the annular boss inside the turntable outer locking ring (31). The inner wall of the turntable inner locking ring (33) is fixedly connected to the middle of the outer surface of the upper parallel shaft gearbox (40). The upper surface of the turntable inner locking ring (33) is uniformly machined with n square countersunk holes along the circumferential direction, where n is a positive integer. Each square countersunk hole has an OK clip (35) inside. The OK clip (35) is fixedly connected to the bottom surface of the square countersunk hole on the turntable inner locking ring (33) by bolts.

2. The adjustable rotation and angle transmission device for a test bench according to claim 1, characterized in that: The lower surface of the inner ring (21) of the turntable is positioned with the upper surface of the drive turntable (10) by means of a stop fit, and the inner ring (21) of the turntable is fixedly connected to the upper surface of the drive turntable (10) by bolts. The outer circumference of the inner ring (21) of the turntable is fitted with a bearing (22), and the outer ring of the bearing (22) is fitted with an outer worm gear ring (23) of the turntable. A drive motor (24) is provided on one side of the upper surface of the drive turntable (10). The output end of the drive motor (24) is connected to one end of the worm (25) through a coupling. The worm (25) is connected to the outer worm gear ring (23) of the turntable.

3. The adjustable rotation and angle transmission device for a test bench according to claim 1, characterized in that: The number of square countersunk holes n on the inner locking ring (33) of the turntable is 8≤n≤20.

4. The adjustable rotation and angle transmission device for a test bench according to claim 1, characterized in that: The aforementioned upper parallel shaft gearbox (40) includes a housing, a driven bevel gear (41), a main shaft (42), a flange (43), and a driving bevel gear (44). The housing has a horizontal main shaft (42) inside, and both ends of the main shaft (42) pass through the outer wall of the housing. Both ends of the main shaft (42) are provided with a flange (43). The main shaft (42) is provided with a driven bevel gear (41). The driven bevel gear (41) is located inside the housing. The lower surface of the housing has an output end hole in the middle, and a drive shaft is provided in the output end hole. The top of the drive shaft is fitted with a drive bevel gear (44), and the drive bevel gear (44) meshes with the driven bevel gear (41). The bottom end of the drive shaft passes through the rotary locking mechanism (30) and the rotary mechanism (20) in sequence, and then is connected to the top end of the output shaft (14) on the drive turntable (10) through a coupling.

5. The adjustable rotation and angle transmission device for a test bench according to claim 4, characterized in that: The bottom of the upper parallel shaft gearbox (40) is fixedly connected to the upper surface of the outer worm gear ring (23) of the turntable.

6. The adjustable rotation and angle transmission device for a test bench according to claim 1, characterized in that: The outer diameter of the output shaft (14) in the drive turntable (10) is smaller than the outer diameter of the main shaft (12).

7. The adjustable rotation and angle transmission device for a test bench according to claim 4, characterized in that: The two ends of the main shaft (42) are rotatably connected to the housing.

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