A sealing structure and harmonic reducer

Abstract

The utility model relates to harmonic reducer technical field, concretely is a kind of sealing structure and harmonic reducer, including servo motor, the flange plate is fixed to the one end of servo motor, the sealing assembly is inserted to the one end of flange plate, the harmonic reducer main part is inserted to the other end of sealing assembly, the driving hole is equipped in the one end of harmonic reducer main part, and motor shaft is inserted;The sealing structure and harmonic reducer proposed in the utility model mainly are through setting sealing assembly between harmonic reducer main part and the flange plate of connecting servo motor, through the sealing extrusion ring insertion of combination sealing washer on both ends of sealing groove, avoid grease exudation, air sealing groove cooperation air seal ring prevents external corrosive gas liquid infiltration, if grease permeates sealing groove, further prevent grease leakage by the inner anti-seepage baffle ring and outer anti-seepage baffle ring in the middle of combination sealing washer, and can be stored in anti-seepage reserve groove to avoid exosmosis, and the structure greatly enhances the sealing performance of harmonic reducer.

Description

Technical Field

[0001] This utility model relates to the field of harmonic reducer technology, specifically a sealing structure and a harmonic reducer. Background Technology

[0002] Harmonic reducers are a new type of transmission structure, belonging to a special category of gear reducers. They are widely used in fields such as robotics, precision instruments, aerospace, and medical equipment. They mainly consist of three core components: a fixed internal gear, a flexible gear, and a wave generator that causes radial deformation of the flexible gear. The gear is a rigid internal gear, while the flexible gear is a deformable thin-walled cylindrical external gear. Both have the same module, but the gear has two more teeth than the flexible gear. The wave generator is usually composed of an elliptical disk and a flexible ball bearing. During operation, the wave generator acts as the driving element, causing the flexible gear to generate a controllable elastic deformation wave, resulting in relative tooth misalignment between the teeth of the gear and the flexible gear, thereby transmitting power and motion.

[0003] Chinese Patent CN222163449U discloses a harmonic reducer, comprising a wave generator, a flexible spline, a circular spline, and a bearing base. The outer circumferential surface of the wave generator is assembled and connected to the inner circumferential surface of the flexible spline, and the outer circumferential surface of the flexible spline engages with the inner circumferential surface of the circular spline. A threaded hole is provided at the bottom of the circular spline, and a bottom through hole is provided on the bearing base. A connecting screw passes through the bottom through hole and the threaded hole to connect the bearing base to the circular spline. The advantages of this invention are: the flexible spline is forged, which improves fatigue strength and extends service life; the increased smoothness and wear resistance of the spline further extend its service life.

[0004] The aforementioned solutions and existing technologies for harmonic reducers typically involve adding lubricant to the crossed roller bearings to reduce noise and wear. The main body of the existing harmonic reducer is usually connected to a flange and a motor, with only an O-ring seal between the reducer body and the flange. Operating at the same height as the motor shaft, this can easily lead to lubricant leakage over time, affecting the reducer's operation. Therefore, there is a lack of a corresponding sealing structure with enhanced sealing performance for harmonic reducers, requiring improvement and optimization. Utility Model Content

[0005] The purpose of this invention is to provide a sealing structure and a harmonic reducer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealing structure includes a servo motor, one end of which is fixedly connected to a flange, one end of which is inserted into a sealing component, and the other end of which is inserted into a harmonic reducer body. One end of the harmonic reducer body is provided with a drive hole, and a motor shaft is inserted into the drive hole. One end of the motor shaft is rotatably connected to the servo motor.

[0007] Preferably, one end of the flange is provided with a grease groove, one end of the flange is provided with a first sealing groove, a first sealing gasket is inserted into the first sealing groove, and one end of the flange is provided with an air sealing groove.

[0008] Preferably, one end of the harmonic reducer body is provided with a second sealing groove, and a second sealing gasket is inserted into the second sealing groove; one end of the harmonic reducer body is provided with an air sealing groove.

[0009] Preferably, one end of the flange is provided with a receiving groove and one end of the flange is provided with a connecting hole, one end of the harmonic reducer body is provided with a receiving groove and one end of the harmonic reducer body is provided with a connecting hole.

[0010] Preferably, the sealing assembly includes a combined sealing gasket, one end of which is fixedly connected to a sealing compression ring, and both ends of which are symmetrically fixedly connected to air sealing rings. Both ends of the combined sealing gasket are symmetrically fixedly connected to inner anti-seepage rings, and both ends of the combined sealing gasket are symmetrically fixedly connected to outer anti-seepage rings. An anti-seepage storage tank is provided between the inner and outer anti-seepage rings.

[0011] Preferably, one end of the sealing compression ring is inserted into the first sealing groove, the other end of the sealing compression ring is inserted into the second sealing groove, and one end of the air sealing ring is inserted into the air sealing groove.

[0012] Preferably, the inner seepage-proof ring is inserted into the receiving groove, the outer seepage-proof ring is inserted into the receiving groove, the inner seepage-proof ring is tightly attached to one end of the inner wall of the receiving groove, and the outer seepage-proof ring is tightly attached to the other end of the inner wall of the receiving groove.

[0013] A harmonic reducer includes a sealing structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The sealing structure and harmonic reducer proposed in this utility model mainly involve setting a sealing component between the main body of the harmonic reducer and the flange connecting the servo motor. By inserting the sealing compression ring on the combined sealing gasket into the sealing grooves at both ends, grease leakage is prevented. The air sealing groove, together with the air sealing ring, prevents external corrosive gas and liquid from seeping in. If grease passes through the sealing groove, the inner and outer anti-seepage retaining rings in the middle of the combined sealing gasket can further prevent grease leakage, and it can be stored in the anti-seepage reserve tank to prevent external leakage. This structure greatly enhances the sealing performance of the harmonic reducer. Attached Figure Description

[0015] Figure 1 A schematic diagram of a sealing structure and a harmonic reducer; Figure 2 An exploded view of a sealing structure and a harmonic reducer; Figure 3 An exploded view of a sealing structure and a harmonic reducer from another perspective; Figure 4 This is a partial structural cross-sectional view of a sealing structure and a harmonic reducer; Figure 5 for Figure 4 Enlarged diagram of part A in the middle.

[0016] In the diagram: servo motor 1, flange 2, combined sealing gasket 301, sealing compression ring 302, air sealing ring 303, inner anti-seepage retaining ring 304, outer anti-seepage retaining ring 305, anti-seepage storage tank 306, harmonic reducer body 4, drive hole 5, motor shaft 6, grease tank 7, first sealing groove 8, first sealing gasket 9, air sealing groove 10, second sealing groove 11, second sealing gasket 12, receiving groove 13, connecting hole 14. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figures 1-5 The present invention provides the following two preferred embodiments: Example 1: A sealing structure includes a servo motor 1, with a flange 2 fixedly connected to one end of the servo motor 1. A sealing component is inserted into one end of the flange 2, and a harmonic reducer body 4 is inserted into the other end of the sealing component. A drive hole 5 is provided at one end of the harmonic reducer body 4, and a motor shaft 6 is inserted into the drive hole 5. One end of the motor shaft 6 is rotatably connected to the servo motor 1. A grease groove 7 is provided at one end of the flange 2, and a first sealing groove 8 is provided at one end of the flange 2. A first sealing gasket 9 is inserted into the first sealing groove 8. An air sealing groove 10 is provided at one end of the flange 2. A second sealing groove 11 is provided at one end of the harmonic reducer body 4, and a second sealing gasket 12 is inserted into the second sealing groove 11. An air sealing groove 10 is provided at one end of the harmonic reducer body 4. A receiving groove 13 is provided at one end of the flange 2, and a connecting hole 14 is provided at one end of the flange 2.

[0019] A harmonic reducer includes a sealing structure.

[0020] In use, the servo motor 1 is fixed to the flange 2 with screws. The first sealing gasket 9 is inserted into the first sealing groove 8 on the flange 2. Grease is injected into the grease groove 7 in the middle of the flange 2. The sealing assembly is aligned with the connection hole 14 and inserted into one end of the flange 2. The drive hole 5 on the harmonic reducer body 4 is aligned with the motor shaft 6 and inserted and rotated to align the connection hole 14. The second sealing gasket 12 is inserted into the second sealing groove 11. Finally, the screws are connected through the connection hole 14.

[0021] Example 2: Based on Example 1, the sealing assembly includes a combined sealing gasket 301. A sealing compression ring 302 is fixedly connected to one end of the combined sealing gasket 301. Air sealing rings 303 are symmetrically fixedly connected to both ends of the combined sealing gasket 301. Inner seepage-proof rings 304 and outer seepage-proof rings 305 are symmetrically fixedly connected to both ends of the combined sealing gasket 301. The inner seepage-proof ring 304 and the outer seepage-proof ring 305... An anti-seepage storage tank 306 is provided between them; one end of the sealing compression ring 302 is inserted into the first sealing groove 8, and the other end of the sealing compression ring 302 is inserted into the second sealing groove 11; one end of the air sealing ring 303 is inserted into the air sealing groove 10; the inner anti-seepage retaining ring 304 is inserted into the receiving groove 13, and the outer anti-seepage retaining ring 305 is inserted into the receiving groove 13. The inner anti-seepage retaining ring 304 is tightly attached to one end of the inner wall of the receiving groove 13, and the outer anti-seepage retaining ring 305 is tightly attached to the other end of the inner wall of the receiving groove 13.

[0022] In use, one end of the sealing compression ring 302 in the middle of the combined sealing gasket 301 on the sealing assembly is inserted into the first sealing groove 8, and the other end is inserted into the second sealing groove 11, which plays a preliminary role in sealing and preventing leakage. The air sealing rings 303 at both ends of the combined sealing gasket 301 are correspondingly inserted into the air sealing grooves 10 to prevent external corrosive gases or liquids from seeping in and corroding the sealing structure. If grease passes through the first sealing groove 8 or the second sealing groove 11 of the first layer, the inner anti-leakage retaining ring 304 and the outer anti-leakage retaining ring 305 in the middle of the combined sealing gasket 301 are tightly attached to the inner wall of the receiving groove 13 to play a further anti-leakage sealing role. If grease passes through the inner anti-leakage retaining ring 304 again, the leaked grease will be stored in the anti-leakage storage groove 306 to prevent grease from leaking out and affecting the outside of the harmonic reducer. The multi-layer sealing structure greatly enhances the sealing performance of the harmonic reducer.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure, comprising a servo motor (1), characterized in that: One end of the servo motor (1) is fixedly connected to a flange (2), one end of the flange (2) is connected to a sealing component, and the other end of the sealing component is connected to a harmonic reducer body (4). One end of the harmonic reducer body (4) is provided with a drive hole (5), and the drive hole (5) is connected to a motor shaft (6). One end of the motor shaft (6) is rotatably connected to the servo motor (1). The sealing assembly includes a combined sealing gasket (301), one end of which is fixedly connected to a sealing compression ring (302), and both ends of the combined sealing gasket (301) are symmetrically fixedly connected to air sealing rings (303). Both ends of the combined sealing gasket (301) are symmetrically fixedly connected to an inner seepage-proof ring (304), and both ends of the combined sealing gasket (301) are symmetrically fixedly connected to an outer seepage-proof ring (305). A seepage-proof storage tank (306) is provided between the inner seepage-proof ring (304) and the outer seepage-proof ring (305).

2. The sealing structure according to claim 1, characterized in that: The flange (2) has a grease groove (7) at one end, a first sealing groove (8) at one end, a first sealing gasket (9) inserted in the first sealing groove (8), and an air sealing groove (10) at one end.

3. The sealing structure according to claim 1, characterized in that: The harmonic reducer body (4) has a second sealing groove (11) at one end, and a second sealing gasket (12) is inserted into the second sealing groove (11). The harmonic reducer body (4) has an air sealing groove (10) at one end.

4. A sealing structure according to claim 1, characterized in that: The flange (2) has a receiving groove (13) at one end and a connecting hole (14) at the other end. The harmonic reducer body (4) has a receiving groove (13) at one end and a connecting hole (14) at the other end.

5. A sealing structure according to claim 1, characterized in that: One end of the sealing compression ring (302) is inserted into the first sealing groove (8), the other end of the sealing compression ring (302) is inserted into the second sealing groove (11), and one end of the air sealing ring (303) is inserted into the air sealing groove (10).

6. A sealing structure according to claim 1, characterized in that: The inner seepage-proof ring (304) is inserted into the receiving groove (13), and the outer seepage-proof ring (305) is inserted into the receiving groove (13). The inner seepage-proof ring (304) is tightly attached to one end of the inner wall of the receiving groove (13), and the outer seepage-proof ring (305) is tightly attached to the other end of the inner wall of the receiving groove (13).

7. A harmonic reducer, characterized in that: The sealing structure includes any one of claims 1-6.

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