Heavy-load planetary roller screw traction loading method and device
By adopting a centrally symmetrical distribution traction loading method and device in the heavy-load planetary roller screw test, and using pulley sets and hydraulic cylinder systems, the problems of high cost and insufficient rigidity in the existing technology are solved, and efficient heavy-loading is achieved Test and high rigidity effect.
Patent Information
- Application Number
- CN202411515195.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2024-12-13
AI Technical Summary
The prior art is costly and has a small test bench specification in heavy-load planetary roller screw test, and lacks efficient traction loading methods and devices, resulting in lateral bending trend and bending moment problems, and insufficient rigidity.
The heavy-load planetary roller screw traction loading method and device adopting a central symmetric distribution. By setting planetary roller screws and hydraulic cylinders on both sides of the test bench, and using pulley sets and steel ropes to provide tension, the ear plates on both sides are simulated. The force situation is to balance the load through the hydraulic cylinder, reduce the length of the test bench and the force arm, and reduce the deformation.
It effectively avoids the lateral bending trend, reduces the bending moment, improves the overall rigidity of the test bench, reduces the cost and deformation, and achieves efficient heavy-load testing.
Smart Images
Figure CN119124614A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of planetary roller screw testing, and in particular relates to a heavy-load planetary roller screw traction loading method and device. Background Art
[0002] As a transmission mechanism, the planetary roller screw combines the two modes of motion, spiral motion and planetary motion, converts the rotary motion of the servo motor into the linear motion output by the servo mechanism, and converts the motor torque into the driving force required by the servo mechanism, pushing the load to move to meet the requirements of the servo mechanism output characteristics. It has the characteristics of high transmission accuracy, strong load-bearing capacity, high efficiency, high operating speed, high reliability and long service life, and is very suitable for occasions with high comprehensive performance requirements; Planetary roller screws are commonly used transmission components in mechanical systems. They have high precision, axial stiffness and load-bearing capacity and are widely used in various machines and equipment. Current test benches usually use two sets of identical or similar planetary roller screws for relative testing. Such test benches are often smaller in size. However, for heavy-duty planetary roller screws, if two sets of identical planetary roller screws are used, the cost is too high. Currently, there is an urgent need to develop a heavy-duty planetary roller screw traction loading method and device. Summary of the invention
[0003] One technical problem to be solved by the present invention is to provide a heavy-loaded planetary roller screw traction loading method, and another technical problem to be solved by the present invention is to provide a heavy-loaded planetary roller screw traction loading device to overcome the defects of the prior art.
[0004] The heavy-duty planetary roller screw traction loading method and device of the present invention adopts a test bench with a centrally symmetrical distribution, and the test device and the test object are arranged on the upper and lower sides of the test bench. Compared with a test bench with a horizontal distribution in which the test bench is subjected to force on one side under stress, the tendency of lateral bending can be avoided, and no additional balance beam is required to share the bending moment of the test bench. At the same time, the steel rope system can only provide tension, and the test object is also only subjected to unilateral force during actual use. The function of displacement amplification is realized through the pulley group, and the total length of the test bench is reduced by half. At the same time, the force arm of the test bench is reduced, the lateral curvature is reduced, the overall deformation is reduced, and the overall rigidity of the test bench is improved.
[0005] The heavy-duty planetary roller screw traction loading method and device of the present invention are realized by the following technical solutions: A heavy-duty planetary roller screw traction loading method, comprising: The planetary roller screw and the hydraulic cylinder are respectively arranged on the upper and lower sides of the test bench; Then, the driving motor is arranged on the same side of the planetary roller screw; The driving motor is connected to the ball screw through a pulley block and a steel rope sleeved on the pulley block to provide only pulling force to the planetary roller screw; Outputting simulation instructions to the control console to control the drive motor to drive the steel rope to simulate different force conditions on the planetary roller screw; Record the test data of planetary roller screw; The test bench has a centrally symmetrical structure, the drive motor and the planetary roller screw are symmetrically arranged on the test bench along the center, the steel ropes are symmetrically distributed on both sides of the nut to simulate the stress conditions of the ear plates on both sides, and the hydraulic cylinder is used to balance the loads on both sides.
[0006] In one embodiment, it also includes: an output end support and a driven end support are respectively arranged along the two ends of the test bench, one end of the planetary roller screw is connected to the driving motor arranged at the output end support, and the other end is connected to the driven end support, and the steel rope is connected to the nut and forms a closed loop connection with the hydraulic cylinder through a pulley group.
[0007] In one embodiment, recording test data of a planetary roller screw includes: A detection device is arranged on the test bench, and the detection device is located between the output end support and the driven end support. The detection device includes a force sensor, a grating scale and a differential scale.
[0008] The present invention also provides a heavy-loaded planetary roller screw traction loading device, comprising a test bench body, wherein a planetary roller screw and a hydraulic cylinder are respectively arranged on the upper and lower sides of the test bench body, an output end support and a driven end support are respectively arranged at both ends of the planetary roller screw, a drive motor is arranged at the output end support, one end of the planetary roller screw is connected to the drive motor, and the other end is connected to the driven end support, steel ropes are arranged on both sides of the nut of the planetary roller screw, and the steel ropes are connected to the hydraulic cylinder through a pulley set to form a closed loop.
[0009] In one embodiment, a first tooling and a second tooling are respectively provided on the upper and lower sides of the test bench body, the steel rope is connected to the nut through a cable knot, both ends of the steel rope are connected to the first tooling, and the steel rope is also sleeved on the pulley block and connected to the hydraulic cylinder and the second tooling.
[0010] In one embodiment, the pulley block includes a movable pulley and a fixed pulley arranged below the test bench body.
[0011] In one embodiment, it also includes a detection device arranged between the output end support and the driven end support, and the detection device includes a force sensor, a grating scale and a differential scale.
[0012] In one embodiment, it further includes a support disposed below the test bench body, and the hydraulic cylinder is mounted on the support.
[0013] In one embodiment, it further includes brackets arranged at both ends of the test bench body, and rollers are arranged on the brackets.
[0014] The heavy-duty planetary roller screw traction loading method and device of the present invention have the following characteristics: 1. The test bench adopts a central symmetrical distribution, with the test device and the test object placed on the upper and lower sides of the test bench. Compared with the horizontal distribution, the test bench is subjected to force on one side under stress, and the test bench has a tendency to lateral bending, requiring the addition of an additional balance beam. Under the central symmetrical distribution, the force is distributed on both sides of the test bench, and the final resultant force direction is along the main beam direction of the test bench, so no additional balance beam is required to share the bending moment of the test bench. 2. The steel rope system can only provide tension. The test object is also only subjected to unilateral force during actual use. The steel rope system also adopts symmetrical distribution, that is, there is a group of steel ropes on each side of the nut shell to simulate the force of the ear plates on both sides, and the loads on both sides are balanced by the hydraulic cylinder; 3. The fixed points at both ends of a single set of steel ropes are arranged symmetrically on the upper and lower sides of the nut housing ear axis about the test object axis, and the resultant force provided by the steel ropes is ultimately along the centerline direction of the test object axis; 4. The pulley block structure is adopted to shorten the total length of the test bench by half. At the same time, the force arm of the test bench is reduced, the lateral curvature is reduced, the overall deformation is reduced, and the overall rigidity of the test bench is improved.
[0015] In short, the heavy-duty planetary roller screw traction loading method and device of the present invention reduces the total length of the test bench by half, while reducing the force arm of the test bench, decreasing the lateral curvature, and reducing the overall deformation, thereby improving the overall rigidity of the test bench and having practical engineering value. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a front view of the heavy-duty planetary roller screw traction loading device of the present invention; Figure 2 A top view of the heavy-duty planetary roller screw traction loading device of the present invention; Figure 3 It is a schematic diagram of the installation of the heavy-duty planetary roller screw traction loading device of the present invention; Figure 4 It is a schematic diagram of the experimental principle of the heavy-duty planetary roller screw traction loading method of the present invention.
[0017] In the figure, 1. test bench body; 2. output end support; 3. driven end support; 4. bracket; 5. planetary roller screw; 6. hydraulic cylinder; 7. first tooling; 8. second tooling; 9. nut; 10. movable pulley; 11. fixed pulley; 12. detection device; 13. support; 14. steel rope; 15. drive motor. DETAILED DESCRIPTION
[0018] The present invention is described in detail below with reference to the accompanying drawings and embodiments.
[0019] Embodiment 1: The heavy-duty planetary roller screw traction loading method of this embodiment comprises the following steps: S1. The planetary roller screw 5 and the hydraulic cylinder 6 are respectively arranged on the upper and lower sides of the test bench; S2. Then the drive motor 15 is set on the same side of the planetary roller screw 5; S3. The drive motor 15 is connected to the ball screw through the pulley block and the steel rope 14 mounted on the pulley block to provide tension only to the planetary roller screw 5; S4 outputs a simulation command to the console to control the drive motor 15 to drive the steel rope 14 to simulate different force conditions of the planetary roller screw 5; S5. Record the test data of the planetary roller screw; The test bench has a centrally symmetrical structure, with the drive motor 15 and the planetary roller screw 5 symmetrically arranged on the test bench along the center, and the steel ropes 14 symmetrically distributed on both sides of the nut 9 to simulate the stress conditions of the ear plates on both sides, and the hydraulic cylinder 6 is used to balance the loads on both sides.
[0020] Furthermore, in S3, an output end support 2 and a driven end support 3 are respectively arranged along the two ends of the test bench, one end of the planetary roller screw 5 is connected to the driving motor 15 arranged at the output end support 2, and the other end is connected to the driven end support 3, and the steel rope 14 is connected to the nut 9 and forms a closed loop connection with the hydraulic cylinder 6 through a pulley group.
[0021] Furthermore, S5 records the test data of the planetary roller screw, including the following test equipment: A detection device 12 is arranged on the test bench. The detection device 12 is located between the output end support 2 and the driven end support 3. The detection device 12 includes a force sensor, a grating scale and a differential scale.
[0022] It should be noted that the test bench adopts a central symmetrical distribution, with the test device and the test object arranged on the upper and lower sides of the test bench, and only tension is provided by the hydraulic cylinder 6 and the steel rope 14, simulating the situation that the test object is only subjected to a unilateral force in actual use. At the same time, the steel rope 14 is also symmetrically distributed on both sides of the nut 9 housing to simulate the force of the ear plates on both sides, and the loads on both sides are balanced by the hydraulic cylinder 6, and the pulley block is used to realize the function of displacement amplification, shortening the total length of the test bench by half, and reducing the force arm of the test bench, so that the lateral curvature decreases, thereby reducing the overall deformation and improving the overall rigidity of the test bench; like Figures 1 to 3 As shown, the heavy-duty planetary roller screw traction loading device of this embodiment includes a test bench body 1, and a planetary roller screw 5 and a hydraulic cylinder 6 are respectively arranged on the upper and lower sides of the test bench body 1, and an output end support 2 and a driven end support 3 are respectively arranged at both ends of the planetary roller screw 5. A driving motor 15 is arranged at the output end support 2, one end of the planetary roller screw 5 is connected to the driving motor 15, and the other end is connected to the driven end support 3, and steel ropes 14 are arranged on both sides of the nut 9 of the planetary roller screw 5, and the steel rope 14 is connected to the hydraulic cylinder 6 through a pulley group to form a closed loop.
[0023] Furthermore, a first tooling 7 and a second tooling 8 are respectively provided on the upper and lower sides of the test bench body 1, a steel rope 14 is connected to a nut 9 through a cable knot, both ends of the steel rope 14 are connected to the first tooling 7, and the steel rope 14 is also sleeved on the pulley block and connected to the hydraulic cylinder 6 and the second tooling 8.
[0024] Furthermore, if Figure 3 As shown, the pulley block includes a movable pulley 10 and a fixed pulley 11 arranged below the test bench body 1, and also includes a support 13 arranged below the test bench body 1, the hydraulic cylinder 6 is installed on the support 13, and also includes a bracket 4 arranged at both ends of the test bench body 1, and the bracket 4 is provided with a roller.
[0025] It should be noted that if Figure 4As shown, the test bench body 1 adopts a central symmetrical distribution, and the test device and the test object are arranged on the upper and lower sides of the test bench. Compared with the horizontal distribution, the test bench is subjected to unilateral force under the stress state, and the test bench has a tendency to lateral bending, and an additional balance beam is required. Under the central symmetrical distribution stress state, the force is distributed on both sides of the test bench, and the final resultant force direction is along the main beam direction of the test bench. No additional balance beam is required to share the bending moment of the test bench; the steel rope 14 system can only provide tension, and the test object is also only subjected to unilateral force during actual use. The system also adopts a symmetrical distribution, that is, there is a group of steel ropes 14 on each side of the nut 9 housing to simulate the stress conditions of the ear plates on both sides, and the loads on both sides are balanced by the hydraulic cylinder 6. At the same time, the fixed points at both ends of the single group of steel ropes 14 are symmetrically arranged on the upper and lower sides of the ear axis of the nut 9 housing about the test object axis, and finally the resultant force provided by the steel ropes 14 is along the center line direction of the test object axis; the pulley group structure is adopted to shorten the total length of the test bench by half, and at the same time, the test bench force arm is reduced, the lateral curvature is reduced, the overall deformation is reduced, and the overall rigidity of the test bench is improved.
[0026] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.
Claims
1. A heavy-duty planetary roller screw traction loading method, characterized in that: The steps include: S1. The planetary roller screw (5) and the hydraulic cylinder (6) are respectively arranged on the upper and lower sides of the test bench; S2. Then the drive motor (15) is set on the same side of the planetary roller screw (5); S3. The drive motor (15) is connected to the ball screw through a pulley block and a steel rope (14) mounted on the pulley block to provide tension only to the planetary roller screw (5); S4 outputs a simulation command to the console to control the drive motor (15) to drive the steel rope (14) to simulate different force conditions on the planetary roller screw (5); S5. Record the test data of the planetary roller screw (5); The test bench has a centrally symmetrical structure, a driving motor (15) and a planetary roller screw (5) are symmetrically arranged on the test bench along the center, steel ropes (14) are symmetrically distributed on both sides of the nut (9) to simulate the stress conditions of the ear plates on both sides, and a hydraulic cylinder (6) is used to balance the loads on both sides.
2. The heavy-duty planetary roller screw traction loading method according to claim 1, characterized in that: In the S3, an output end support (2) and a driven end support (3) are respectively arranged along the two ends of the test bench, one end of the planetary roller screw (5) is connected to a drive motor (15) arranged at the output end support (2), and the other end is connected to the driven end support (3), and the steel rope (14) is connected to the nut (9) and is connected to the hydraulic cylinder (6) through a pulley block to form a closed loop.
3. The heavy-duty planetary roller screw traction loading method according to claim 1, characterized in that: In the above-mentioned S5, the specific method of recording the test data of the planetary roller screw (5) is as follows: A detection device (12) is arranged on the test bench. The detection device (12) is located between the output end support (2) and the driven end support (3). The detection device (12) comprises a force sensor, a grating scale and a differential scale.
4. A heavy-duty planetary roller screw traction loading device, used in the heavy-duty planetary roller screw traction loading method according to any one of claims 1 to 3, characterized in that: The test bench comprises a test bench body (1), wherein a planetary roller screw (5) and a hydraulic cylinder (6) are respectively arranged on the upper and lower sides of the test bench body (1), an output end support (2) and a driven end support (3) are respectively arranged at both ends of the planetary roller screw (5), a drive motor (15) is arranged at the output end support (2), one end of the planetary roller screw (5) is connected to the drive motor (15), and the other end is connected to the driven end support (3), and steel ropes (14) are arranged on both sides of a nut (9) of the planetary roller screw (5), and the steel ropes (14) are connected to the hydraulic cylinder (6) through a pulley block to form a closed loop.
5. The heavy-duty planetary roller screw traction loading device according to claim 4, characterized in that: A first tooling (7) and a second tooling (8) are respectively provided on the upper and lower sides of the test bench body (1); a steel rope (14) is connected to a nut (9) via a cable knot; both ends of the steel rope (14) are connected to the first tooling (7); the steel rope (14) is also sleeved on a pulley block and connected to a hydraulic cylinder (6) and the second tooling (8).
6. The heavy-duty planetary roller screw traction loading device according to claim 4, characterized in that: The pulley block comprises a movable pulley (10) and a fixed pulley (11) which are arranged below the test bench body (1).
7. The heavy-duty planetary roller screw traction loading device according to claim 4, characterized in that: A support (13) is arranged below the test bench body (1), and the hydraulic cylinder (6) is mounted on the support (13).
8. The heavy-duty planetary roller screw traction loading device according to claim 4, characterized in that: The two ends of the test bench body (1) are provided with brackets (4), and rollers are provided on the brackets (4).