Rotary driver

Abstract

The invention provides a rotary driver, which relates to the technical field of transmission mechanisms and comprises a movable disc, a fixed disc, a self-lubricating bushing, a cam driving block, a wedge block, an elastic rubber block and a driving cover, an inner gear is arranged in the movable disc; an outer gear surrounding the second shaft hole is arranged on the lower surface of the fixed disc, and rotation driving is carried out through meshing of the outer gear and the inner gear. The self-lubricating bush is arranged in the second shaft hole; the cam driving block is arranged in the self-lubricating bush and arranged on a positioning column of the movable disc in a sleeving mode. The two wedge blocks are symmetrically installed in the self-lubricating lining and compensate for meshing sudden-change jumping of the outer gear and the inner gear. The elastic rubber block is clamped in the clamping groove of the cam driving block, and the elastic rubber block buffers the impact of the wedge block; a middle cylinder and a connecting pin are arranged on the driving cover, the middle cylinder is inserted into the movable disc, and the connecting pin is inserted into the clamping groove of the cam driving block and connected with an external power mechanism through the driving cover.

Description

Technical Field

[0001] This invention relates to the field of transmission mechanism technology, and in particular to a rotary drive. Background Technology

[0002] In car seat fore-aft and angle adjustments, rotary actuators can precisely adjust the seat angle and position to suit the needs of different passengers. These actuators provide a smooth adjustment process and can withstand long-term use.

[0003] Traditional rotary drives mostly use gear transmissions. During gear meshing, vibrations or irregular impacts can easily occur, leading to uneven movement and even jamming or stalling. This problem is particularly pronounced under heavy loads or high-speed operation. Furthermore, traditional rotary drives have high friction between gears and bearings, easily causing excessive wear and shortening the equipment's lifespan. This friction problem is especially severe under high loads and prolonged use. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a rotary drive that can solve the technical problems of existing rotary drives, such as the easy generation of jumping or irregular impact forces during gear meshing, resulting in uneven movement, or even jamming or stalling, and the large friction between gears and bearings, which can easily lead to excessive wear and shorten the service life of the equipment.

[0005] This invention provides a rotary actuator, comprising: a moving disk, a fixed disk, a self-lubricating bushing, a cam drive block, a wedge block, an elastic rubber block, and a drive cover; The moving disk is provided with an internal gear, and a first shaft hole is provided at the center of the moving disk. A positioning post is formed by protruding along the first shaft hole on the upper surface of the moving disk. The fixed plate has a second shaft hole at its axial center position, and the lower surface of the fixed plate has an external gear surrounding the second shaft hole. The rotation is driven by the meshing of the external gear and the internal gear. The self-lubricating bushing is disposed in the second shaft hole; The cam drive block is disposed inside the self-lubricating bushing and sleeved on the positioning post of the moving plate; The two wedges are symmetrically installed in the self-lubricating bushing. The wedges jump as the internal gear of the moving disc jumps, so as to compensate for the sudden jump of the meshing between the external gear and the internal gear. The elastic rubber block is engaged in the slot of the cam drive block. The elastic rubber block is used to buffer the impact of the wedge. When the elastic rubber block is squeezed by the wedge, it adheres to the self-lubricating bushing. Through the wiper effect, it removes the lubricating oil on the surface of the self-lubricating bushing. The lubricating oil protects the friction surface of the wedge during the movement. The drive cover has a central cylinder and a connecting foot. The central cylinder is inserted into the first shaft hole of the moving plate, and the connecting foot is inserted into the slot of the cam drive block. The drive cover is connected to an external power mechanism.

[0006] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: (1) In the embodiments of the present invention, a unique wedge design is adopted. The wedge jumps with the internal gear of the moving plate to compensate for the sudden jump of the meshing between the external gear and the internal gear, ensuring that the wedge can quickly adapt when the gear jumps, reducing the jamming phenomenon and improving the smoothness of operation.

[0007] (2) In this embodiment of the invention, an elastic rubber block is added between the wedge and the cam drive block to buffer the impact of the wedge and prevent instability caused by rigid connection. When the elastic rubber block is squeezed by the wedge, it adheres to the self-lubricating bushing and removes the lubricating oil on the surface of the self-lubricating bushing through the wiper effect. The lubricating oil protects the friction surface of the wedge during the movement, alleviates wear, and improves the service life of the equipment. Attached Figure Description

[0008] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0009] Figure 1 This is an exploded view of a rotary actuator provided in an embodiment of the present invention.

[0010] Figure 2 This is a partial structural schematic diagram of a rotary driver provided in an embodiment of the present invention.

[0011] Figure 3 This is a partial structural schematic diagram of another rotary driver provided in an embodiment of the present invention.

[0012] Figure 4 This is a schematic diagram of the structure of an elastic rubber block provided in an embodiment of the present invention.

[0013] Figure 5This is a partial structural schematic diagram of a rotary actuator from another perspective provided by an embodiment of the present invention.

[0014] Explanation of reference numerals in the attached drawings: 1-Moving disc; 2-Fixed disc; 3-Sealing ring; 4-Self-lubricating bushing; 5-Cam drive block; 6-Wedge block; 61-Curved transition structure; 62-Swing structure; 63-First gap; 7-Elastic rubber block; 71-Guide fin; 72-Second gap; 8-Core spring; 9-Drive cover; 10-Gasket; 11-Snap ring. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0016] Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts disclosed in this invention.

[0017] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0018] Reference manual attached Figures 1 to 5 The present invention provides a rotary actuator structure comprising: a moving disk 1, a fixed disk 2, a self-lubricating bushing 4, a cam drive block 5, a wedge block 6, an elastic rubber block 7, and a drive cover 9.

[0019] The core components of the rotary actuator are a moving disk 1 and a fixed disk 2. The moving disk 1 contains an internal gear, and a first shaft hole is located at its center. A positioning post protrudes along the first shaft hole on the upper surface of the moving disk 1. The fixed disk 2 has a second shaft hole at its axial center, and an external gear surrounds the second shaft hole on its lower surface. Rotation is achieved through the meshing of the external gear and the internal gear.

[0020] The self-lubricating bushing 4 is located inside the second shaft hole, serving to reduce friction and improve motion efficiency. The bushing material is self-lubricating, providing long-term lubrication between the moving plate 1 and the fixed plate 2, reducing wear caused by friction and extending the service life of the drive. This design greatly improves the durability of the rotary drive, especially under prolonged high-load operation.

[0021] The cam drive block 5 is located inside the self-lubricating bushing 4 and is sleeved on the positioning post of the moving plate 1, thereby achieving precise control of the wedge block 6.

[0022] Two wedges 6 are symmetrically installed inside the self-lubricating bushing 4. The wedges 6 move with the internal gear of the moving disc 1 to compensate for the sudden changes in the meshing of the external and internal gears. This ensures that the wedges can quickly adapt when the gears move, reducing jamming and improving the smoothness of operation. The motion compensation characteristics of the wedges 6 ensure the smoothness of gear meshing and avoid problems such as jumping and jamming that may occur in traditional rotary drives under high loads or high speeds.

[0023] The elastic rubber block 7 is engaged in the slot of the cam drive block 5. The elastic rubber block 7 is used to buffer the impact of the wedge block 6 and prevent instability caused by rigid connection. When the elastic rubber block 7 is squeezed by the wedge block 6, it adheres to the self-lubricating bushing 4. Through the wiper effect, it removes the lubricating oil on the surface of the self-lubricating bushing 4. The lubricating oil protects the friction surface of the wedge block 6 during movement, reduces wear, and extends the service life of the equipment.

[0024] It should be noted that the wiper effect of the elastic rubber block is an innovative lubrication protection mechanism. Through the squeezing action of the rubber, it removes excess lubricating oil from the surface of the self-lubricating bushing and prevents the oil film from being scraped away, ensuring that the friction surface of the wedge is fully lubricated during movement. This lubrication design can significantly reduce friction fluctuations, maintain the stability of the friction surface, extend the service life of the actuator, and effectively reduce wear and noise.

[0025] The drive cover 9 is a crucial component connecting the rotary actuator to the external power system. The drive cover 9 features a central cylinder and connecting feet. The central cylinder inserts into the first shaft hole of the moving plate 1, ensuring a tight connection between the drive cover and the moving plate. The connecting feet insert into the slots of the cam drive block 5, allowing the drive cover to work stably in conjunction with the cam drive block. Power transmission and control are achieved through the connection to the external power mechanism via the drive cover 9. This design ensures that the rotary actuator can receive external power and achieve smooth rotational control.

[0026] Alternatively, the external power mechanism can be a motor, electric motor, etc.

[0027] In this embodiment of the invention, the innovation of the rotary actuator lies mainly in improving the actuator's smoothness, durability, and lubrication efficiency through various structural designs. Through precise meshing of internal and external gears, wedge block runout compensation, the buffering effect of elastic rubber blocks, and a unique lubrication system design, this rotary actuator effectively solves the friction, runout, and noise problems of traditional actuators under high loads and long-term use, exhibiting higher stability and a longer service life. It is particularly suitable for mechanical equipment requiring precise adjustment and long-term stable operation.

[0028] In one possible implementation, the surface of the wedge 6 and the self-lubricating bushing 4 on one side adopts a curved transition structure 61. Through the curved transition structure 61, the surface of the wedge 6 and the self-lubricating bushing 4 are ensured to fit together during the runout of the internal gear, maintaining stable and continuous friction and compensating for the sudden runout of the meshing of the external gear and the internal gear.

[0029] In this embodiment of the invention, a curved transition structure 61 is used to design the fit between the wedge 6 and one side surface of the self-lubricating bushing 4, which can effectively ensure smooth contact between the wedge and the bushing surface during the internal gear runout. This structure can provide continuous compensation during sudden gear meshing runout, avoiding vibration and jamming that may occur during traditional gear meshing, ensuring smooth operation of the rotary drive, reducing friction fluctuations, and thus improving the drive's operational stability, accuracy, and service life.

[0030] Optionally, the curved surface transition structure 61 adopts a partially involute transition structure. Using a partially involute transition structure as the curved surface transition design allows for a smoother transition between the contact surfaces of the wedge and the self-lubricating bushing during gear runout, thus ensuring a tight fit between the wedge and bushing surfaces. The involute design helps reduce abrupt runout during meshing, optimizes the distribution of friction, and improves the meshing efficiency between gears. This design not only effectively reduces impact and vibration but also significantly improves the stability and durability of the transmission system, reduces wear, and extends the service life of the rotary drive.

[0031] In one possible implementation, a rocking structure 62 is provided on one side of the wedge block 6 and the cam drive block 5, so that the wedge block 6 swings around the middle point as a fulcrum, ensuring that the surface of the wedge block 6 is in contact with the self-lubricating bushing 4 during the jumping of the internal gear, and compensating for the sudden jumping of the meshing between the external gear and the internal gear.

[0032] In this embodiment of the invention, by providing a rocking structure 62 on the surfaces of the wedge 6 and the cam drive block 5, the wedge oscillates around the midpoint as a fulcrum, effectively addressing the abrupt meshing changes generated during internal gear runout. This structure ensures continuous contact between the wedge and the surface of the self-lubricating bushing 4, thereby smoothly transitioning gear runout and reducing impact and vibration during gear meshing. This design optimizes stability during gear transmission, reduces jamming, improves transmission efficiency, and simultaneously reduces friction and wear, extending the service life of the drive unit.

[0033] Optionally, the rocker structure 62 adopts a partially involute rocker structure. Using a partially involute rocker structure as the rocker design for the wedge allows for a smoother transition of the wedge between the contact surface and the self-lubricating bushing during meshing. This involute structure enables the wedge to precisely adapt to the runout of the internal gear during rocking, reducing irregular vibrations and impacts, and ensuring the smoothness and continuity of gear meshing. This design effectively compensates for abrupt changes caused by gear runout, reduces friction fluctuations, improves transmission efficiency, extends the stable operating time of the drive, and increases its durability.

[0034] In one possible implementation, a first gap 63 is formed between the end of the wedge 6 and the self-lubricating bushing 4. The lubricating oil is guided through the first gap 63 to ensure that the lubricating oil can form an oil film according to the designed path. This ensures that the friction surface of the wedge 6 is protected by lubricating oil during the movement, thereby ensuring the stability of the friction force and improving the service life.

[0035] In this embodiment of the invention, by forming a first gap 63 between the end of the wedge 6 and the self-lubricating bushing 4, and guiding the lubricating oil through this gap, it can be ensured that the lubricating oil forms a stable oil film along a predetermined path, thereby providing continuous lubrication protection for the friction surface of the wedge. This design effectively reduces fluctuations in friction, avoids excessive wear caused by uneven friction, and improves the working efficiency and stability of the actuator. Furthermore, the protective effect of the lubricating oil significantly extends the service life of the rotary actuator, reducing the frequency of maintenance and replacement.

[0036] In one possible implementation, the elastic rubber block 7 is provided with a guide fin 71 that protrudes along the circumference. The guide fin 71 creates a second gap 72 between the elastic rubber block 7 and the self-lubricating bushing 4. The lubricating oil is guided through the second gap 72 to ensure that the friction surface of the wedge block 6 is protected by lubricating oil during the movement, thereby ensuring the stability of the friction force and improving the service life.

[0037] In this embodiment of the invention, by providing a guide fin 71 with a circumferentially protruding form on the elastic rubber block 7, a second gap 72 can be formed between the elastic rubber block and the self-lubricating bushing 4, thereby guiding the lubricating oil. This design ensures that the lubricating oil can effectively cover the friction surface of the wedge block 6 during its movement, providing continuous lubrication protection. The guide fin 71 not only avoids the waste of lubricating oil, but also ensures the stability of friction, reduces friction and wear, improves the working efficiency of the actuator, extends its service life, and reduces the maintenance requirements of the equipment.

[0038] In one possible implementation, the rotary actuator further includes a sealing ring 3. The outer edges of the fixed plate 2 and the moving plate 1 are laser-welded together via the sealing ring 3.

[0039] In this embodiment of the invention, by using a sealing ring 3 to laser weld the outer edges of the fixed plate 2 and the moving plate 1 together, lubricating oil leakage can be effectively prevented and the sealing performance of the structure can be improved. Laser welding technology ensures the strength and precision of the connection, enhancing the durability and reliability of the drive. This design not only prevents external contaminants from entering the internal mechanical components but also maintains stable lubricating oil within the drive system, reducing friction and wear, extending the drive's service life, and ensuring its long-term stable operation.

[0040] In one possible implementation, the rotary actuator further includes a core spring 8. The wedge block 6 is designed with spring mounting holes. The open ends of the core spring 8 are provided with protruding spring feet that insert into the spring mounting holes of the wedge block 6.

[0041] In this embodiment of the invention, by designing spring mounting holes on the wedge 6 and employing a core spring 8 with protruding spring feet, the spring can be stably engaged with the wedge, providing precise tension control. The protruding spring feet at both ends of the core spring can be securely inserted into the spring mounting holes of the wedge, ensuring that the spring maintains the correct position and force during movement. This design helps maintain the stability of the wedge, avoids deviations during movement, provides the necessary restoring force, ensures the efficient and smooth operation of the rotary actuator, and extends its service life.

[0042] In one possible implementation, the rotary actuator further includes a retaining ring 11. The retaining ring 11 is mounted in the central cylinder of the drive cover 9 by means of a retaining clip.

[0043] In this embodiment of the invention, the retaining ring 11 prevents the drive cover 9 from disengaging from the moving disk 1. This design ensures a tight connection between the drive cover and the moving disk, preventing loosening or component displacement during rotation, thereby improving the structural stability and safety of the rotary drive. The use of the retaining ring not only enhances the robustness of the assembly but also avoids potential malfunctions or damage, ensuring the long-term reliable operation of the drive.

[0044] In one possible implementation, the rotary drive further includes a shim 10. The shim 10 is disposed between the moving disk 1 and the retaining ring 11.

[0045] It should be noted that by using shims 10 of different thicknesses, the cumulative tolerance is compensated, ensuring the controlled and stable movement clearance of the drive.

[0046] In this embodiment of the invention, by setting shims 10 of different thicknesses between the moving disk 1 and the retaining ring 11, cumulative tolerance compensation can be achieved, ensuring precise control of the motion clearance of the rotary actuator. This design effectively eliminates clearance fluctuations caused by manufacturing or assembly errors of components, maintaining the stability and consistency of the actuator's motion. The use of shims 10 not only improves motion accuracy but also reduces wear and noise caused by uneven clearance, thereby extending the service life of the actuator and improving its overall performance.

[0047] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary actuator, characterized in that, include: Moving plate, fixed plate, self-lubricating bushing, cam drive block, wedge block, elastic rubber block and drive cover; The moving disk is provided with an internal gear, and a first shaft hole is provided at the center of the moving disk. A positioning post is formed by protruding along the first shaft hole on the upper surface of the moving disk. The fixed plate has a second shaft hole at its axial center position, and the lower surface of the fixed plate has an external gear surrounding the second shaft hole. The rotation is driven by the meshing of the external gear and the internal gear. The self-lubricating bushing is disposed in the second shaft hole; The cam drive block is disposed inside the self-lubricating bushing and sleeved on the positioning post of the moving plate; The two wedges are symmetrically installed in the self-lubricating bushing. The wedges jump as the internal gear of the moving disc jumps, so as to compensate for the sudden jump of the meshing between the external gear and the internal gear. The elastic rubber block is engaged in the slot of the cam drive block. The elastic rubber block is used to buffer the impact of the wedge. When the elastic rubber block is squeezed by the wedge, it adheres to the self-lubricating bushing. Through the wiper effect, it removes the lubricating oil on the surface of the self-lubricating bushing. The lubricating oil protects the friction surface of the wedge during the movement. The drive cover has a central cylinder and a connecting foot. The central cylinder is inserted into the first shaft hole of the moving plate, and the connecting foot is inserted into the slot of the cam drive block. The drive cover is connected to an external power mechanism.

2. The rotary actuator according to claim 1, characterized in that, The surface of the wedge and the self-lubricating bushing adopts a curved transition structure. Through the curved transition structure, the surface of the wedge and the self-lubricating bushing are ensured to fit together during the runout of the internal gear, thereby compensating for the sudden runout of the meshing between the external gear and the internal gear.

3. The rotary actuator according to claim 2, characterized in that, The wedge and the surface of one side of the cam drive block are provided with a rocking structure, so that the wedge swings around the middle point as a fulcrum, ensuring that the surface of the wedge is in contact with the self-lubricating bushing during the jumping of the internal gear, and compensating for the sudden jumping of the meshing between the external gear and the internal gear.

4. The rotary actuator according to claim 3, characterized in that, The curved surface transition structure adopts a local involute transition structure, and the rocking structure adopts a local involute rocking structure.

5. The rotary actuator according to claim 1, characterized in that, A first gap is formed between the end of the wedge and the self-lubricating bushing. The lubricating oil is guided through the first gap to ensure that the friction surface of the wedge is protected by lubricating oil during the movement.

6. The rotary actuator according to claim 1, characterized in that, The elastic rubber block is provided with guide fins that protrude along the circumference. The guide fins create a second gap between the elastic rubber block and the self-lubricating bushing. The lubricating oil is guided through the second gap to ensure that the friction surface of the wedge is protected by lubricating oil during the movement.

7. The rotary actuator according to claim 1, characterized in that, Also includes: Seal off the area; The outer edges of the fixed plate and the moving plate are laser-welded together by the sealing ring.

8. The rotary actuator according to claim 1, characterized in that, Also includes: Core spring; The wedge is designed with a spring mounting hole; the two ends of the core spring are provided with protruding spring feet, which are inserted into the spring mounting hole of the wedge.

9. The rotary actuator according to claim 1, characterized in that, Also includes: Card circle; The retaining ring is installed in the middle cylinder of the drive cover using retaining ring pliers.

10. The rotary actuator according to claim 9, characterized in that, Also includes: Gasket; The gasket is disposed between the moving disc and the retaining ring.

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