Novel harmonic reducer

Abstract

The utility model discloses a novel harmonic reducer which comprises a flange, a rigid gear, a flexible gear and a wave generator, the flange is connected with the rigid gear, the flexible gear is connected with the rigid gear, the tooth end of the flexible gear is sleeved on the wave generator and meshed with the tooth surface of the rigid gear through the wave generator, an impeller and a space ring are arranged on the flexible gear, and the space ring is arranged in the flexible gear. The interior of the flexible gear is divided into a first cavity and a second cavity through a space ring, the wave generator is arranged in the first cavity, the impeller is arranged in the second cavity, a third cavity is formed between the rigid gear and the flexible gear, a circulation hole is formed in the flexible gear and communicated with the second cavity and the third cavity, a gap is formed between the flange and the flexible gear, and a connecting shaft is arranged on the wave generator. The connecting shaft is connected with impellers. Lubricating agents circularly flow in the harmonic reducer, the rigid gear, the flexible gear and the wave generator are lubricated, heat is absorbed, the heat release time of the lubricating agents is prolonged, it is guaranteed that the lubricating agents release heat in time, the service life of equipment is prolonged, the situation that the equipment is suspended for heat dissipation is avoided, and working efficiency is improved.

Description

Technical Field

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

[0002] Harmonic reducers mainly consist of three basic components: a wave generator, a flexible gear, and a rigid gear. They are transmission devices that utilize gears to achieve speed changes, reducing the rotational speed of the driving component to the required speed of the equipment, thereby generating greater torque. Due to their advantages such as large transmission ratio, high load-bearing capacity, high transmission accuracy, and high transmission efficiency, harmonic reducers are used in most mechanical transmission systems, such as heavy transportation vehicles like locomotives, ships, and automobiles, processing tools and automated production equipment used in the machinery industry, and even in smart homes.

[0003] In existing technologies, harmonic reducers have a compact structure and limited internal space, making it difficult to install effective heat dissipation devices. To ensure the normal operation of harmonic reducers, grease lubrication or oil lubrication is usually used to meet the lubrication requirements of the reducer. At the same time, the lubricant can absorb and conduct the heat generated by the mechanical parts during operation, helping to dissipate heat. However, when the harmonic reducer is running continuously for a long time, the lubricant fails to release the absorbed heat in time, causing heat to accumulate and generate heat. High temperature will reduce the strength limit of the lubricant and decrease its adhesion, ultimately leading to a decrease in lubrication performance and affecting the service life of the equipment. Measures such as suspending the operation of the equipment are usually required to avoid overheating, which also leads to a decrease in its working efficiency. Utility Model Content

[0004] The main purpose of this utility model is to overcome the defects of the above-mentioned background technology and provide a new type of harmonic reducer.

[0005] To achieve the above objectives, this utility model proposes a novel harmonic reducer comprising a flange, a rigid wheel, a flexible wheel, and a wave generator. The flange is connected to the rigid wheel, and the flexible wheel is rotatably connected to the rigid wheel. The toothed end of the flexible wheel is fitted onto the wave generator and meshes with the toothed surface of the rigid wheel through the wave generator. The flexible wheel is provided with an impeller and a spacer ring, the spacer ring being disposed inside the flexible wheel. The interior of the flexible wheel is divided into a first cavity and a second cavity by the spacer ring. The wave generator is disposed in the first cavity, the impeller is disposed in the second cavity, and a third cavity is provided between the rigid wheel and the flexible wheel. The flexible wheel is provided with a flow hole, the flow hole connecting the second cavity and the third cavity. A gap is provided between the flange and the flexible wheel. The wave generator is provided with a connecting shaft, the connecting shaft connecting the impeller. During the operation of the harmonic reducer, the connecting shaft drives the wave generator and impeller to rotate. The impeller rotates and throws the lubricant flowing from the first cavity to the second cavity onto the cavity wall of the second cavity. The lubricant then enters the third cavity through the flow hole. Next, the lubricant enters the meshing point between the flexible wheel and the rigid wheel from the third cavity to lubricate and absorb heat. After lubrication, the lubricant enters the first cavity through the gap between the flexible wheel and the flange, lubricating the wave generator and the moving parts of the flexible wheel in the first cavity and absorbing heat again. Then it enters the second cavity. This circulation of lubricant lubricates the rigid wheel, flexible wheel, and wave generator and absorbs heat. The circulation of lubricant increases the heat release time of the lubricant, ensuring that the lubricant releases heat in a timely manner, avoiding heat accumulation and overheating, which would reduce lubrication performance and improve the service life of the equipment. At the same time, it avoids stopping the equipment to dissipate heat, thus improving work efficiency.

[0006] To further optimize the technical solution, a pressure block is provided on the flange. This pressure block holds the wave generator in place, preventing it from detaching from the flexspline cavity and affecting equipment operation.

[0007] To further optimize the technical solution, a ball bearing is provided at the end of the pressure block. The ball bearing holds the wave generator in place, reducing friction between the pressure block and the wave generator during rotation and thus lowering power consumption.

[0008] To further optimize the technical solution, a shoulder is provided on the connecting shaft. This prevents the wave generator from contacting the spacer and increasing friction.

[0009] To further optimize the technical solution, the orifice of the flow hole is chamfered to facilitate the flow of lubricant into the third cavity.

[0010] To further optimize the technical solution, the rigid wheel is equipped with heat dissipation grooves, and heat dissipation rings are installed in the heat dissipation grooves. The heat dissipation rings can more quickly transfer heat from inside the harmonic reducer to the outside.

[0011] To further optimize the technical solution, the rigid wheel is provided with an oil supply hole and an oil drain hole, which are connected to the internal cavity of the rigid wheel. Both the oil supply hole and the oil drain hole are equipped with plugs to facilitate the replenishment and replacement of lubricant.

[0012] The beneficial effects of this utility model include: by circulating the lubricant, the rigid wheel, flexible wheel, and wave generator are lubricated and heat is absorbed, increasing the heat release time of the lubricant, ensuring that the lubricant releases heat in a timely manner, avoiding heat accumulation and heat generation, which would reduce lubrication performance, and improving the service life of the equipment. At the same time, it avoids stopping the equipment to dissipate heat, thus improving work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the harmonic reducer in an embodiment of this utility model.

[0014] Figure 2 This is a schematic diagram of the flange structure in an embodiment of this utility model.

[0015] Figure 3 yes Figure 1 AA sectional view.

[0016] Figure 4 yes Figure 1 BB cross-sectional view.

[0017] Reference numerals: 1. Flange; 2. Rigid wheel; 21. Heat dissipation groove; 22. Third cavity; 23. Oil supply hole; 24. Oil drain hole; 3. Flexible wheel; 31. Impeller; 32. Spacer ring; 33. First cavity; 34. Second cavity; 35. Flow hole; 4. Wave generator; 5. Connecting shaft; 51. Shaft shoulder; 6. Pressure block; 61. Ball bearing; 7. Heat dissipation ring; 8. Hole plug. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Please see Figures 1 to 4The harmonic reducer disclosed in one embodiment includes a flange 1, a rigid wheel 2, a flexible wheel 3, and a wave generator 4. The flange 1 is connected to the rigid wheel 2, which has a hollow structure. One end of the inner wall of the rigid wheel 2 is provided with annular internal teeth. The flexible wheel 3 is disposed inside the rigid wheel 2 and is rotatably connected to the rigid wheel 2. The flexible wheel 3 is a cavity, with one end of the flexible wheel 3 being an opening. The outer wall of the opening end of the flexible wheel 3 is provided with annular external teeth. The wave generator 4 is symmetrically provided with protrusions and is rotatably connected to the flexible wheel 3. The wave generator 4 and the flexible wheel 3 are interference-fitted. The tooth end of the flexible wheel 3 is deformed by the protrusions of the wave generator 4 and then meshes with the tooth surface of the rigid wheel 2. The flexible wheel 3 includes an impeller 31 and a spacer 32, with the spacer 32 disposed on the inner wall of the flexible wheel 3. The flexible wheel 3 is internally divided into a first cavity 33 and a second cavity 34 by a spacer ring 32. The wave generator 4 is located in the first cavity 33. The impeller 31 is connected to the flexible wheel 3 body bearing and is located in the second cavity 34. A third cavity 22 is provided between the rigid wheel 2 and the flexible wheel 3. The cavity section from the rotational connection point of the rigid wheel 2 and the flexible wheel 3 to the meshing point of the rigid wheel 2 and the flexible wheel 3 is the third cavity 22. Multiple flow holes 35 are evenly distributed on the flexible wheel 3, and the flow holes 35 connect the second cavity 34 and the third cavity 22. There is a gap between the flange 1 and the flexible wheel 3. A connecting shaft 5 is fixedly connected to the wave generator 4. A through groove is opened in the middle of the spacer ring 32, and the connecting shaft 5 passes through the through groove of the spacer ring 32 and connects to the impeller 31. All the above components that come into contact with the outside are... The internal space of the harmonic reducer is sealed by installing an oil seal (not shown) or a gasket (not shown) to prevent lubricant leakage. During the operation of the harmonic reducer, the connecting shaft 5 is driven to rotate by the driver (not shown). The wave generator 4 and impeller 31 connected to the connecting shaft 5 rotate synchronously. The blades apply force to the lubricant, giving it kinetic and pressure energy. The impeller 31 throws the lubricant in the second cavity 34 onto the cavity wall of the second cavity 34. The lubricant flows into the third cavity 22 through the flow hole 35 on the cavity wall. Then, the lubricant enters the space between the tooth surfaces of the flexible wheel 3 and the rigid wheel 2 from the third cavity 22 to lubricate the meshing rotation of the flexible wheel 3 and the rigid wheel 2 and absorb heat. The lubricant passes through the gap between the flange 1 and the flexible wheel 3. The lubricant enters the first cavity 33, lubricates the moving parts of the wave generator 4 and the flexible wheel 3 within the first cavity 33, and absorbs heat again. It continues to flow into the depth of the flexible wheel 3 cavity through the gap between the wave generator 4 and the flexible wheel 3 and flows into the through groove of the spacer ring 32. Finally, it returns to the second cavity 34 to start the next cycle. As described above, the lubricant circulates in the first cavity 33, the second cavity 34, and the third cavity 22, lubricating the rigid wheel 2, the flexible wheel 3, and the wave generator 4 and absorbing heat. This increases the heat release time of the lubricant, ensuring that the lubricant releases heat in a timely manner, avoiding heat accumulation and overheating, which would reduce lubrication performance and improve the service life of the harmonic reducer. At the same time, it avoids stopping the equipment to dissipate heat, thus improving working efficiency.

[0023] In a preferred embodiment, a pressure block 6 is provided on the flange 1; the pressure block 6 abuts against the wave generator 4 to prevent the wave generator 4 from disengaging from the cavity of the flexible wheel 3, which would prevent the flexible wheel 3 from deforming and engaging with the rigid wheel 2, thus affecting the operation of the equipment.

[0024] In a preferred embodiment, the end of the pressure block 6 is provided with a ball bearing 61; the ball bearing 61 abuts against the wave generator 4, changing from sliding contact to rolling contact, thereby reducing the friction between the pressure block 6 and the wave generator 4 when the wave generator 4 rotates and reducing power consumption.

[0025] In a preferred embodiment, the connecting shaft 5 is provided with a shoulder 51, which is located in the first cavity 33, and the wave generator 4 rests on the shoulder 51. The shoulder 51 separates the wave generator 4 from the spacer 32, preventing the wave generator 4 from contacting the spacer 32 and increasing friction. It also separates the wave generator 4 from the spacer 32, making it easier for lubricant to flow into the through groove of the spacer 32.

[0026] In a preferred embodiment, the flow hole 35 is provided at the opening of the second cavity 34 with a chamfered edge to facilitate the flow of lubricant into the third cavity 22.

[0027] In a preferred embodiment, the rigid wheel 2 is provided with a heat dissipation groove 21, the opening position of the heat dissipation groove 21 corresponds to the third cavity 22, and a heat dissipation ring 7 is provided in the heat dissipation groove 21. The heat dissipation ring 7 is preferably made of aluminum. The heat dissipation ring 7 can transfer heat to the lubricant flowing through the third cavity 22 more quickly and transfer the heat to the outside.

[0028] In a preferred embodiment, the rigid wheel 2 is provided with an oil supply hole 23 and an oil drain hole 24, which are arranged opposite to each other. The oil supply hole 23 and the oil drain hole 24 are connected to the third cavity 22 inside the rigid wheel 2. Both the oil supply hole 23 and the oil drain hole 24 are provided with plugs 8. When replenishing lubricant, the plug 8 of the oil supply hole 23 is opened, and new lubricant is slowly added along the wall of the oil supply hole 23 or injected into the oil supply hole 23 with a syringe. This prevents the formation of an oil film when the lubricant flows in the oil supply hole 23, which would cause inconsistent air pressure inside and outside, preventing the lubricant from flowing into the third cavity 22. When changing the lubricant, the oil drain hole 24 is placed facing the ground, the oil supply hole 23 and the oil drain hole 24 are opened, the lubricant is released, and gas is introduced through the oil supply hole 23 to accelerate the release of the lubricant. Finally, the plug 8 is put back, and new lubricant is added again according to the above steps. With the cooperation of the oil supply hole 23 and the oil drain hole 24, the replenishment and replacement of lubricant can be completed without disassembling the harmonic reducer.

[0029] Working principle: The driver (not shown) rotates the connecting shaft 5, and the wave generator 4 and impeller 31 connected to the connecting shaft 5 rotate synchronously. The balls 61 on the pressure block 6 roll on the surface of the wave generator 4 due to the rotational friction of the wave generator 4. The blades apply force to the lubricant, giving the lubricant kinetic and pressure energy. The impeller 31 rotates and throws the lubricant flowing from the first cavity 33 to the second cavity 34 onto the cavity wall of the second cavity 34. The lubricant enters the bearing connection of the third cavity 22 through the flow hole 35 on the cavity wall to lubricate the bearing. Then, the lubricant enters the space between the tooth surfaces of the flexible wheel 3 and the rigid wheel 2 from the third cavity 22. The lubricant lubricates and absorbs heat during the meshing and rotation of the flexible wheel 3 and the rigid wheel 2. The lubricant flows from the cavity formed after the deformation of the flexible wheel 3 into the first cavity 33, lubricates the wave generator 4 and the moving parts of the flexible wheel 3 in the first cavity 33, and absorbs heat again. It then flows into the through groove of the spacer ring 32 through the gap between the wave generator 4 and the flexible wheel 3, and finally returns to the second cavity 34 to start the next cycle. If it is necessary to add lubricant to the harmonic reducer, open the plug 8 of the oil supply hole 23 and add new lubricant. If it is necessary to replace the lubricant, open the plug 8 of the oil supply hole 23 and the drain hole 24, drain the old lubricant first, and then add new lubricant.

[0030] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A novel harmonic reducer, comprising a flange, a rigid wheel, a flexible wheel, and a wave generator, wherein the flange is connected to the rigid wheel, the flexible wheel is rotatably connected to the rigid wheel, and the toothed end of the flexible wheel is fitted onto the wave generator and meshes with the toothed surface of the rigid wheel through the wave generator, characterized in that: The flexible wheel is provided with an impeller and a spacer ring. The spacer ring is located inside the flexible wheel, and the interior of the flexible wheel is divided into a first cavity and a second cavity by the spacer ring. The wave generator is located in the first cavity, and the impeller is located in the second cavity. A third cavity is provided between the rigid wheel and the flexible wheel. The flexible wheel is provided with a flow hole, which connects the second cavity and the third cavity. A gap is provided between the flange and the flexible wheel. The wave generator is provided with a connecting shaft, which connects to the impeller.

2. The novel harmonic reducer as described in claim 1, characterized in that: The flange is equipped with a pressure block.

3. The novel harmonic reducer as described in claim 2, characterized in that: The pressure block is equipped with ball bearings.

4. A novel harmonic reducer as described in claim 1, characterized in that: The connecting shaft is provided with a shoulder.

5. A novel harmonic reducer as described in claim 1, characterized in that: The opening of the flow hole is chamfered.

6. A novel harmonic reducer as described in claim 1, characterized in that: The rigid wheel is provided with heat dissipation grooves, and heat dissipation rings are provided in the heat dissipation grooves.

7. A novel harmonic reducer as described in claim 1, characterized in that: The rigid wheel is provided with an oil supply hole and an oil drain hole, which are connected to a third cavity. Both the oil supply hole and the oil drain hole are provided with plugs.

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