Hollow driving assembly mechanism

Abstract

The invention provides a hollow driving assembly mechanism. The hollow driving assembly mechanism comprises a hollow motor, a hollow harmonic reducer, a hollow potentiometer and a hollow shaft system, the hollow motor outputs rotating speed and torque for the driving assembly; the hollow harmonic reducer is an intermediate transmission link, plays a role in reducing the speed and increasing the distance, and transmits the torque to the hollow shaft system; the hollow shaft system provides support for the driving assembly, and a hollow potentiometer is installed on the hollow shaft system, feeds back the rotating position of the output shaft and is used for closed-loop control. The central hole of the driving assembly is internally provided with a sheath which is kept static with the casing of the hollow motor but rotates relative to the output shaft of the hollow shaft system, and the cable is wired in the sheath and is fixedly connected with the sheath, so that the cable does not twist or bend in the central hole of the driving assembly. The driving assembly is of a hollow structure, the motor, the harmonic reducer, the potentiometer and the shaft system of the driving assembly are all of a hollow structure, a center hole of the driving assembly is used for wiring, and the wiring complexity of the mechanism can be remarkably reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of drive mechanisms, and in particular relates to a hollow drive assembly mechanism. Background Art

[0002] To meet the deployment and pointing requirements of satellite solar panels, antennas, cameras, and other components, the components need to be equipped with drive components. These drive components should have a certain load-driving capacity and positioning-holding capability, and implement closed-loop control through feedback signals from position sensors.

[0003] This type of drive component rotates many times on track, and the two ends of the cable leading to the end of the mechanism are connected to the fixed side and the rotating side respectively. When the rotation range is large, in order to meet the cable length changes and torsion and bending requirements caused by the rotation of the mechanism, the cable is often wrapped around the outer surface of each component. The routing method is complicated, and even additional slip ring mechanisms are required for power or signal transmission. Summary of the Invention

[0004] In order to overcome the deficiencies in the prior art, the inventors have conducted intensive research and provided a hollow drive assembly mechanism. Through the hollow structural design of the structural parts, the cables can pass through the drive assembly simply and reliably, thereby achieving routing with the end of the mechanism.

[0005] The technical solutions provided by the present invention are as follows:

[0006] A hollow drive assembly mechanism includes a hollow motor, a hollow harmonic reducer, a hollow potentiometer and a hollow shaft system;

[0007] The hollow motor outputs speed and torque to the drive assembly;

[0008] The hollow harmonic reducer is the intermediate transmission link, which plays the role of deceleration and distance increase and transmits the torque to the hollow shaft system;

[0009] The hollow shaft system provides support for the drive assembly. A hollow potentiometer is installed on the hollow shaft system to feedback the position of the output shaft rotation for closed-loop control.

[0010] A sheath is provided in the center hole of the drive assembly, which remains stationary with the hollow motor housing but rotates relative to the output shaft of the hollow shaft system. The cable is routed in the sheath and fixedly connected to it, so that the cable will not twist or bend in the center hole of the drive assembly.

[0011] A hollow drive assembly mechanism provided by the present invention has the following beneficial effects:

[0012] (1) The present invention provides a hollow drive assembly mechanism, wherein the drive assembly is of a hollow configuration, and its components, including the motor, harmonic reducer, potentiometer, and shaft system, are all of a hollow configuration, and the center hole is used for wiring, which can significantly reduce the wiring complexity of the mechanism;

[0013] (2) The present invention provides a hollow drive assembly mechanism, wherein the center hole sheath of the drive assembly remains stationary with the housing and rotates relative to the output shaft. The cable in the sheath is fixed to the sheath by means of glue filling, etc., so that the bending and twisting of the cable occur in the free section of the cable outside the drive assembly, ensuring a reliable connection of the cable in the inner hole;

[0014] (3) The present invention provides a hollow drive assembly mechanism, in which one end of the sheath with a connecting flange is connected to the motor housing, and the other end passes through the drive assembly and extends beyond the envelope of the drive assembly body, so as to ensure that the cable is isolated from the output shaft; a bearing is provided between the sleeve and the output shaft of the drive assembly, so as to withstand the bending moment generated when the cable is bent and twisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the hollow drive assembly mechanism;

[0016] Figure 2 This is an external view of the hollow drive assembly mechanism. DETAILED DESCRIPTION

[0017] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0018] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0019] like Figure 1As shown, the present invention provides a hollow drive assembly mechanism, including a hollow motor 15, a hollow harmonic reducer 13, a hollow potentiometer 14 and a hollow shaft system; the hollow motor 15 outputs the speed and torque of the drive assembly; the hollow harmonic reducer 13 is an intermediate transmission link, which plays the role of deceleration and distance increase and transmits the torque to the hollow shaft system; the hollow shaft system provides reliable support for the drive assembly, and a hollow potentiometer 14 is installed on the hollow shaft system to feedback the position of the output shaft rotation for closed-loop control. The center hole of the drive assembly is used to meet the wiring requirements. The center hole contains a sheath 10 that remains stationary with the hollow motor housing but rotates relative to the output shaft of the hollow shaft system to protect the cable; the cable can be fixed to the sheath 10 by potting or other methods to ensure that the cable will not twist or bend in the center hole of the drive assembly, ensuring reliable connection of the cable in the center hole. The bending and twisting of the cable occurs in the free section outside the drive assembly, making the risk of cable failure controllable.

[0020] The hollow shaft system includes a casing 1, an angular contact bearing 20 and an output shaft 2. The output shaft 2 is supported on the casing 1 by a pair of preloaded angular contact bearings 20. The stator and rotor parts of the hollow potentiometer 14 are installed on the casing 1 and the output shaft 2 to feedback the position of the output shaft rotation for closed-loop control.

[0021] The outer ring of the angular contact bearing 20 is limited by the casing 1 and the bearing outer pressure plate 3, the bearing outer gasket 6 is clamped between the casing 1 and the bearing outer pressure plate 3, and the casing 1, the bearing outer gasket 6 and the bearing outer pressure plate 3 are fixedly connected by screws; the inner ring of the angular contact bearing 20 is limited by the output shaft 2 and the bearing inner pressure plate 4, the bearing inner gasket 5 is clamped between the output shaft 2 and the bearing inner pressure plate 4, and the output shaft 2, the bearing inner gasket 5 and the bearing inner pressure plate 4 are fixedly connected by screws.

[0022] The shaft of the hollow motor 15 is connected to the wave generator 16 of the hollow harmonic reducer 13 by screws, providing power input for the hollow harmonic reducer 13. Preferably, the axial position of the shaft of the hollow motor 15 and the wave generator 16 is adjusted by a cam adjustment gasket 12. The housing of the hollow motor 15 is connected to the motor adapter flange 11 by screws.

[0023] The flexspline 18 of the hollow harmonic reducer 13 is connected to the output shaft 2 via screws. The flexspline 18 has a cup-shaped, flanging design. This means that while the flexspline 18 is cup-shaped, its mounting interface with the output shaft 2 is turned outward, away from the center hole. This maintains a controlled outer diameter while leaving sufficient clearance for the center hole. Preferably, a flexspline adjustment washer 7 is used to adjust the axial position between the flexspline 18 and the output shaft 2.

[0024] The rigid wheel 17 of the hollow harmonic reducer 13 is positioned with the motor adapter flange 11 and the housing 1 through the stoppers on both sides thereof, and the motor adapter flange 11, the rigid wheel 17 and the housing 1 are connected by screws. Since the housing of the hollow motor 15 is connected to the motor adapter flange 11 by screws, the housing of the hollow motor 15, the adapter flange 11, the rigid wheel 17 and the housing 1 are connected.

[0025] The hollow potentiometer 14 includes a potentiometer rotor 24 and a potentiometer stator 23. The potentiometer rotor 24 is mounted on the end face of the output shaft 2 close to the side of the hollow harmonic reducer 13; the potentiometer stator 23 is mounted on the casing 1; when relative rotation occurs between the stator and rotor of the hollow potentiometer 14, the potential signal of the hollow potentiometer 14 reflects the rotation angle of the rotating part.

[0026] A sheath 10 is located in the center hole of the drive assembly to protect the cable passing through it. One end of the sheath 10, near the connection flange 11, is connected to the housing of the hollow motor 15. The other end extends through the drive assembly, extending beyond the main body of the drive assembly to ensure isolation of the cable from the output shaft.

[0027] Because the sheath 10 is connected to the casing of the hollow motor 15, it remains stationary with the casing 1 of the drive assembly, but rotates relative to the output shaft of the drive assembly. Therefore, a center hole bearing 19 is provided between the sheath 10 and the output shaft 2 of the drive assembly to withstand the bending moment generated by cable bending and twisting. Center hole bearing 19 is located in a chamber surrounded by the bearing inner pressure plate 4, the center hole bearing pressure plate 8, and the center hole bearing bushing 9. The inner ring is mounted on the sheath 10 via the center hole bearing bushing 9, and the outer ring is restrained by the bearing inner pressure plate 4 and the center hole bearing pressure plate 8. The center hole bearing pressure plate 8 is fixed to the bearing inner pressure plate 4 by screws.

[0028] The cable within the drive assembly sheath 10 is secured to the sheath 10 by means of glue or other methods, preventing twisting and bending within the drive assembly's inner bore, ensuring a secure connection. Any bending and twisting of the cable occurs in the free section outside the drive assembly, minimizing the risk of cable failure.

[0029] like Figure 2 As shown, the casing 1 protects and supports the hollow harmonic reducer 13, the hollow potentiometer 14 and the hollow shaft system. The casing 1 is provided with a mounting stop 21 and an axial screw hole on the mounting surface 22 on the side of the hollow motor 15 for positioning and installing the drive assembly on the external structure.

[0030] The present invention has been described in detail above with reference to specific embodiments and exemplary examples, but these descriptions should not be construed as limiting the present invention. Those skilled in the art will appreciate that, without departing from the spirit and scope of the present invention, various equivalent substitutions, modifications or improvements may be made to the technical solutions and implementations of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

[0031] shall prevail.

[0032] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A hollow drive assembly mechanism, characterized in that: It includes a hollow motor (15), a hollow harmonic reducer (13), a hollow potentiometer (14) and a hollow shaft system; The hollow motor (15) outputs the speed and torque for the drive assembly; The hollow harmonic reducer (13) is an intermediate transmission link, which plays the role of reducing speed and increasing distance and transmits torque to the hollow shaft system; The hollow shaft system provides support for the drive assembly, and a hollow potentiometer (14) is installed on the hollow shaft system to feedback the position of the output shaft rotation for closed-loop control; A sheath (10) is provided in the center hole of the drive assembly, which remains stationary with the hollow motor housing but rotates relative to the output shaft of the hollow shaft system. The cable is routed in the sheath (10) and is fixedly connected to the sheath, so that the cable will not be twisted or bent in the center hole of the drive assembly.

2. The hollow drive assembly mechanism according to claim 1, characterized in that: The hollow shaft system comprises a housing (1), an angular contact bearing (20) and an output shaft (2); the output shaft (2) is supported on the housing (1) via a pair of angular contact bearings (20) with preload.

3. The hollow drive assembly mechanism according to claim 2, characterized in that: The outer ring of the angular contact bearing (20) is limited by the housing (1) and the bearing outer pressure plate (3), the bearing outer gasket (6) is clamped between the housing (1) and the bearing outer pressure plate (3), and the housing (1), the bearing outer gasket (6) and the bearing outer pressure plate (3) are fixedly connected by threaded fasteners; the inner ring of the angular contact bearing (20) is limited by the output shaft (2) and the bearing inner pressure plate (4), the bearing inner gasket (5) is clamped between the output shaft (2) and the bearing inner pressure plate (4), and the output shaft (2), the bearing inner gasket (5) and the bearing inner pressure plate (4) are fixedly connected by threaded fasteners.

4. The hollow drive assembly mechanism according to claim 1, characterized in that: The shaft of the hollow motor (15) is connected to the wave generator (16) of the hollow harmonic reducer (13) through a threaded fastener to provide power input for the hollow harmonic reducer (13); preferably, the axial position between the shaft of the hollow motor (15) and the wave generator (16) is adjusted by a cam adjustment gasket (12).

5. The hollow drive assembly mechanism according to claim 1, characterized in that: The flexible wheel (18) of the hollow harmonic reducer (13) is connected to the output shaft (2) through a threaded fastener; the flexible wheel (18) is cup-shaped, and the mounting interface connected to the output shaft (2) is turned outward away from the center hole; preferably, the axial position between the flexible wheel (18) and the output shaft (2) is adjusted by a flexible wheel adjustment gasket (7).

6. The hollow drive assembly mechanism according to claim 1, characterized in that: The rigid wheel (17) of the hollow harmonic reducer (13) is positioned with the motor adapter flange (11) and the housing (1) through the stoppers on both sides thereof, and the motor adapter flange (11), the rigid wheel (17) and the housing (1) are connected by threaded fasteners; The casing of the hollow motor (15) is connected to the motor adapter flange (11) through threaded fasteners, completing the connection between the casing of the hollow motor (15), the adapter flange (11), the rigid wheel (17) and the casing (1).

7. The hollow drive assembly mechanism according to claim 1, characterized in that: The hollow potentiometer (14) comprises a potentiometer rotor (24) and a potentiometer stator (23), wherein the potentiometer rotor (24) is mounted on an end face of an output shaft (2) close to a side of the hollow harmonic reducer (13); the potentiometer stator (23) is mounted on a housing (1); when relative rotation occurs between the stator and rotor of the hollow potentiometer (14), a potential signal of the hollow potentiometer (14) reflects the rotation angle of the rotating part.

8. The hollow drive assembly mechanism according to claim 1, characterized in that: A sheath (10) is provided in the center hole of the drive assembly for protecting the cable passing through the center hole of the drive assembly; one end of the sheath (10) close to the connecting flange (11) is connected to the casing of the hollow motor (15), and the other end passes through the drive assembly and extends beyond the envelope of the drive assembly body to ensure that the cable is isolated from the output shaft.

9. The hollow drive assembly mechanism according to claim 8, characterized in that: A center hole bearing (19) is provided between the sleeve (10) and the output shaft (2) of the drive assembly for bearing the bending moment generated when the cable is bent and twisted; preferably, the center hole bearing (19) is located in a chamber surrounded by a bearing inner pressure plate (4), a center hole bearing pressure plate (8) and a center hole bearing bushing (9); the inner ring is sleeved on the sleeve (10) through the center hole bearing bushing (9); the outer ring is limited by the bearing inner pressure plate (4) and the center hole bearing pressure plate (8); and the center hole bearing pressure plate (8) is fixedly connected to the bearing inner pressure plate (4) through a threaded fastener.

10. The hollow drive assembly mechanism according to claim 1, characterized in that: The housing (1) protects and supports the hollow harmonic reducer (13), the hollow potentiometer (14) and the hollow shaft system. The housing (1) is provided with a mounting stop (21) and an axial screw hole on the mounting surface (22) on the side of the hollow motor (15) for positioning and mounting the drive assembly on the external structure.

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