Harmonic reducer flexible gear with flexible reinforcing ribs

Abstract

A harmonic reducer flexible gear with flexible reinforcing ribs comprises a body area and a tooth attaching area, tooth heads are arranged on the tooth attaching area, the flexible reinforcing ribs are arranged on the outer side of the body area and spirally extend in the circumferential direction of the flexible gear, heat dissipation grooves are formed in the flexible reinforcing ribs, and the included angle between the extending direction of the heat dissipation grooves and the rotating direction of the flexible gear is alpha, 15 DEG < = alpha < = 30 DEG; the heat dissipation groove comprises a heat dissipation section and an arc-shaped transition section, and the heat dissipation section is connected with the bottom of the body area through the arc-shaped transition section. Due to the design of the heat dissipation grooves, the centrifugal force effect during rotation of the flexible gear is fully utilized, lubricating oil flows in the heat dissipation grooves in a directional mode, and then the lubricating oil is thrown out from the ends of the heat dissipation grooves under the centrifugal force effect and flows to the tooth attaching area so as to enhance lubrication and heat dissipation of the tooth attaching area. Due to the fact that the tooth head of the tooth attaching area is meshed with the tooth head on the rigid gear, heat of the tooth attaching area is obviously higher than that of other areas, key distribution of lubricating oil to the tooth attaching area is achieved through the arrangement of the heat dissipation grooves, and the heat dissipation effect of the flexible gear can be improved.

Description

Technical Field

[0001] This application belongs to the field of harmonic reducer technology, specifically relating to a harmonic reducer flexure with flexible reinforcing ribs. Background Technology

[0002] Harmonic reducers, as high-precision, high-ratio speed reduction devices, are widely used in industrial robots, aerospace, precision instruments, and other fields. Their core components include a flexible wheel, a rigid wheel, and a wave generator. The flexible wheel meshes with the rigid wheel through elastic deformation to achieve power transmission. However, in actual operation, the meshing of the flexible wheel and the rigid wheel generates a large amount of frictional heat, leading to excessive temperature rise and consequently affecting the performance and lifespan of the harmonic reducer.

[0003] In traditional flexspline designs, heat dissipation is primarily addressed through lubricating oil circulation or simple grooving. However, these methods have the following drawbacks: Low heat dissipation efficiency: Traditional heat dissipation groove designs are simple, with limited heat dissipation area, failing to effectively reduce the flexspline's operating temperature. Severe stress concentration: During the flexspline's periodic deformation, stress concentration easily occurs at the edges of the heat dissipation grooves, leading to fatigue cracks. Uneven lubrication: The flow path of the lubricating oil within the heat dissipation grooves is unclear, making it difficult to cover high-heat areas, resulting in localized overheating.

[0004] To address the aforementioned problems, several improvements have been proposed in the prior art. For example, increasing the heat dissipation area by creating heat dissipation grooves on the surface of the flexspline, or using special coating materials to enhance thermal conductivity. However, these solutions still have the following limitations: existing heat dissipation grooves are mostly straight lines or simple arcs, failing to fully utilize the rotational characteristics of the flexspline, resulting in limited heat dissipation. The flexspline undergoes periodic deformation during operation, a characteristic that existing heat dissipation groove designs fail to adequately consider, leading to stress concentration and fatigue failure. The flow path of the lubricating oil within the heat dissipation groove is unclear, making it difficult to achieve uniform coverage and affecting the heat dissipation effect.

[0005] Therefore, there is an urgent need for a new type of flex wheel design for harmonic reducers that can efficiently dissipate heat, reduce stress concentration, improve lubrication, and adapt to the dynamic deformation characteristics of the flex wheel, thereby significantly improving the performance and lifespan of the harmonic reducer. Utility Model Content

[0006] This application provides a flexible flexure of a harmonic reducer with flexible reinforcing ribs to solve the technical problems of poor heat dissipation and stress concentration in traditional harmonic reducer flexures.

[0007] The technical solution adopted in this application is as follows:

[0008] A harmonic reducer flexure with flexible reinforcing ribs includes a body region and a toothed region. The toothed region has teeth. The body region has flexible reinforcing ribs on its outer side. The flexible reinforcing ribs extend spirally along the circumference of the flexure. The flexible reinforcing ribs have heat dissipation grooves. The angle between the extension direction of the heat dissipation grooves and the rotation direction of the flexure is α, where 15°≤α≤30°. The heat dissipation grooves include a heat dissipation section and an arc-shaped transition section. The heat dissipation section is connected to the bottom of the body region through the arc-shaped transition section.

[0009] The harmonic reducer flex wheel described in this application also includes the following additional technical features:

[0010] The heat dissipation groove has a V-shaped cross-section, so that the heat dissipation groove extends from the middle to both sides along its extension direction.

[0011] The inner wall of the heat dissipation tank is provided with multiple drainage channels at intervals. The drainage channels extend from the bottom wall of the heat dissipation tank to the top wall of the heat dissipation tank and are used to guide the lubricating oil to flow out of the heat dissipation tank.

[0012] The depth of the drainage channel is 10%-20% of the depth of the heat dissipation channel, and the width of the drainage channel is 10%-15% of the width of the heat dissipation channel.

[0013] The depth of the heat dissipation groove is D1, and the wall thickness of the main body area is D2, where 0.1≤D1 / D2≤0.25.

[0014] The depth of the heat dissipation groove gradually increases from the side closer to the arc-shaped transition section to the side closer to the toothed area.

[0015] The bottom of the heat dissipation groove is provided with elastic support ribs, which are spaced apart from the inner wall of the heat dissipation groove.

[0016] The elastic support rib extends along the extension direction of the heat dissipation groove, and the elastic support rib is integrally formed with the heat dissipation groove.

[0017] The radius of curvature of the arc-shaped transition section is R, 0.5mm≤R≤2mm, and / or the transition angle of the arc-shaped transition section is θ, 30°≤θ≤60°.

[0018] The number of heat dissipation slots is multiple, and the multiple heat dissipation slots are arranged at intervals along the outer periphery of the main body.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0020] 1. This application provides a harmonic reducer flexure with flexible reinforcing ribs, comprising a body region and an attached tooth region. The attached tooth region has teeth for meshing with a rigid wheel. The body region has flexible reinforcing ribs with heat dissipation grooves. The heat dissipation grooves extend spirally along the circumference of the flexure, with an angle α between the extending direction and the rotation direction of the flexure being 15°-30°. Since the flexure deforms during meshing, the reinforcing ribs help increase the structural strength of the flexure and enhance its resistance to impact. Furthermore, placing the heat dissipation grooves on the reinforcing ribs avoids creating grooves in the body region, ensuring the structural integrity of the body region. The heat dissipation groove design fully utilizes the centrifugal force effect during flexure rotation, causing the lubricating oil to flow directionally within the grooves. Under centrifugal force, the oil is then ejected from the end of the grooves and flows towards the attached tooth region, enhancing lubrication and heat dissipation in the attached tooth region. Since the teeth in the attached tooth area mesh with the teeth on the rigid wheel, the heat in the attached tooth area is significantly higher than that in other areas during the operation of the flexible wheel. The heat dissipation groove in this application enables the lubricating oil to be distributed to the attached tooth area in a focused manner, which helps to improve the heat dissipation effect of the flexible wheel.

[0021] In addition, the flexible wheel will deform during operation, undergoing a deformation from a circle to an ellipse. During the deformation of the flexible wheel, the heat dissipation groove is squeezed, which quickly squeezes out the lubricating oil inside. After leaving the heat dissipation groove, the lubricating oil continues to move along the outer surface of the flexible wheel under the action of inertia, and forms a dense oil film on the outer surface of the flexible wheel, which greatly improves the coverage of the lubricating oil on the flexible wheel, thereby significantly enhancing the heat dissipation efficiency of the lubricating oil.

[0022] Furthermore, the heat dissipation groove connects to the main body area via an arc-shaped transition section. This smooth transition design significantly reduces the stress concentration factor at the edge of the heat dissipation groove, preventing fatigue cracks caused by stress concentration. During long-term operation of the harmonic reducer, this extends the fatigue life of the flexspline, making it particularly suitable for applications with extremely high reliability requirements, such as aerospace. Moreover, because the flexspline undergoes periodic elastic deformation during operation, the spiral extension design and arc-shaped transition section of the heat dissipation groove provide space for elastic deformation, preventing cracking or failure of the heat dissipation groove due to excessive deformation.

[0023] 2. As a preferred embodiment of this application, the heat dissipation groove cross-section is set in a V-shape. This design can significantly improve the heat dissipation performance and structural strength of the heat dissipation groove. The V-shaped cross-section of the heat dissipation groove can form a more complex lubricating oil flow path when the flexspline rotates, enhancing the coverage of the lubricating oil and the heat dissipation efficiency. Due to the expansion design on both sides of the V-shaped cross-section, the lubricating oil is guided to flow to both sides, forming a layered lubricating film, further reducing the coefficient of friction and temperature rise. In addition, the wider bottom of the V-shaped cross-section can disperse stress and avoid localized strength weakening caused by slotting. In practical applications, this design can significantly improve the heat dissipation performance of the flexspline, especially under high load conditions, where the heat dissipation efficiency can be increased by 15%-25%. Simultaneously, the V-shaped cross-section structural design can also enhance the overall strength of the flexspline, avoiding fatigue failure caused by excessive slotting.

[0024] 3. As a preferred embodiment of this application, the design of the drainage channel significantly enhances the fluidity and heat dissipation effect of the lubricating oil. The drainage channel extends from the bottom wall to the top of the heat dissipation tank, guiding the lubricating oil from the bottom to the top of the tank, forming a directional lubrication path. This design not only increases the coverage area of ​​the lubricating oil but also enhances the heat dissipation capacity of the heat dissipation tank. Due to the presence of the drainage channel, the flow of lubricating oil within the heat dissipation tank is more uniform, avoiding overheating caused by insufficient local lubrication. Furthermore, the drainage channel increases the inner wall surface area of ​​the heat dissipation tank, further improving heat dissipation efficiency. Simultaneously, the design of the drainage channel also reduces lubricating oil waste and improves the economy of the lubrication system.

[0025] 4. In a preferred embodiment of this application, the depth of the drainage groove is 10%-20% of the depth of the heat dissipation groove, and the width is 10%-15% of the width of the heat dissipation groove. This size ratio maximizes the fluidity of the lubricating oil while ensuring structural strength. Because the drainage groove is optimally designed, the lubricating oil flows more smoothly within the groove, avoiding increased flow resistance caused by excessive groove depth or width. Furthermore, the size ratio of the drainage groove ensures uniform distribution of the lubricating oil within the heat dissipation groove, further improving heat dissipation. Simultaneously, the size design of the drainage groove avoids strength loss due to excessive slotting, improving the overall reliability of the flexible wheel.

[0026] 5. In a preferred embodiment of this application, the ratio of the heat dissipation groove depth D1 to the wall thickness D2 of the body region is 0.1-0.25. This ratio design has been verified through multiple experiments and achieves the best balance between heat dissipation performance and structural strength. Due to the optimized design of the heat dissipation groove depth ratio, the heat dissipation efficiency of the flexspline under high load conditions is significantly improved, while the overall strength remains unaffected. In addition, this design can also adapt to the periodic deformation characteristics of the flexspline, avoiding cracking or failure of the heat dissipation groove due to excessive deformation. The heat dissipation groove depth ratio design can also adapt to various operating conditions, expanding the applicability of the harmonic reducer.

[0027] 6. In a preferred embodiment of this application, the depth of the heat dissipation groove gradually increases from the side near the arc-shaped transition section to the side near the toothed area. This gradient design ensures that high-heat areas (such as the meshing area) receive more heat dissipation area. Due to the gradient change in the depth of the heat dissipation groove, the flow of lubricating oil in high-heat areas is smoother, and the heat dissipation effect is significantly improved. In addition, this design can also disperse stress and avoid stress concentration caused by abrupt changes in depth. The gradient design of the heat dissipation groove depth can also improve the overall strength of the flexible gear and avoid fatigue failure caused by excessive slotting.

[0028] 7. In a preferred embodiment of this application, the elastic support ribs are spaced apart from the inner wall of the heat dissipation groove, providing additional support for the heat dissipation groove and preventing cracking or failure of the heat dissipation groove due to deformation of the flexible wheel. Due to the presence of the elastic support ribs, the heat dissipation groove will abut against the elastic support ribs when the flexible wheel deforms, and will be better reset by the elastic action of the elastic support ribs when the flexible wheel resets, thereby maintaining the stability of the flexible wheel structure and avoiding local stress concentration caused by excessive deformation. Furthermore, the elastic support ribs can also disperse stress, reduce the stress concentration coefficient, and improve the overall strength of the flexible wheel. Simultaneously, the design of the elastic support ribs can also improve the stability of the heat dissipation groove, ensuring more uniform flow of lubricating oil within the groove. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a front view of the flexure of a harmonic reducer according to one embodiment of this application;

[0031] Figure 2 for Figure 1 Enlarged view of part A;

[0032] Figure 3 for Figure 1 Enlarged view of part B;

[0033] Figure 4 This is a partial cross-sectional view of the flexure of a harmonic reducer according to one embodiment of this application;

[0034] Figure 5 This is a partially enlarged view of the flexure of a harmonic reducer according to one embodiment of this application.

[0035] List of components and reference numerals:

[0036] 1. Body region;

[0037] 2. Attached tooth area, 21 tooth tips;

[0038] 3 heat dissipation slots, 31 heat dissipation sections, 32 arc-shaped transition sections;

[0039] 4. Drainage channels;

[0040] 5. Elastic support ribs;

[0041] 6. Flexible reinforcing ribs. Detailed Implementation

[0042] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0044] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0047] like Figures 1 to 5 As shown, a harmonic reducer flexure with flexible reinforcing ribs includes a main body region 1 and a toothed region 2. The toothed region 2 is provided with tooth heads 21. A flexible reinforcing rib 6 is provided on the outer side of the main body region 1. The flexible reinforcing rib 6 extends spirally along the circumference of the flexure. The flexible reinforcing rib 6 has heat dissipation grooves 3. The angle between the extension direction of the heat dissipation grooves 3 and the rotation direction of the flexure is α, where 15°≤α≤30°. The heat dissipation grooves 3 include a heat dissipation section 31 and an arc-shaped transition section 32. The heat dissipation section 31 is connected to the bottom of the main body region 1 through the arc-shaped transition section 32.

[0048] This application provides a harmonic reducer flexure with flexible reinforcing ribs, including a body region 1 and a toothed region 2. The toothed region 2 has teeth 21 for meshing with a rigid wheel. The body region 1 has flexible reinforcing ribs 6, and the flexible reinforcing ribs 6 have heat dissipation grooves 3. The heat dissipation grooves 3 extend spirally along the circumference of the flexure, and the angle α between the extension direction and the rotation direction of the flexure is 15°-30°. Since the flexure deforms during meshing, the reinforcing ribs 6 help increase the structural strength of the flexure and enhance its resistance to impact. Furthermore, placing the heat dissipation grooves 3 on the reinforcing ribs 6 avoids slotting in the body region 1, ensuring the structural integrity of the body region 1. The design of the heat dissipation grooves 3 fully utilizes the centrifugal force effect during the rotation of the flexure, causing the lubricating oil to flow directionally within the heat dissipation grooves 3. Under the action of centrifugal force, the lubricating oil is then thrown out from the end of the heat dissipation grooves 3 and flows towards the toothed region 2, thereby enhancing lubrication and heat dissipation in the toothed region 2. Since the tooth 21 of the toothed area 2 meshes with the tooth 21 on the rigid wheel, the heat in the toothed area 2 is significantly higher than that in other areas during the operation of the flexible wheel. The heat dissipation groove 3 of this application enables the lubricating oil to be distributed to the toothed area 2 in a focused manner, which helps to improve the heat dissipation effect of the flexible wheel.

[0049] Furthermore, the flex wheel deforms during operation, undergoing a transformation from a circular to an elliptical shape. During this deformation, the heat dissipation groove 3 is compressed, rapidly expelling the lubricating oil within. After detaching from the heat dissipation groove 3, the lubricating oil continues to move along the outer surface of the flex wheel under inertia, forming a dense oil film on the outer surface. This significantly increases the coverage area of ​​the lubricating oil on the flex wheel, thereby significantly enhancing its heat dissipation efficiency. Moreover, the heat dissipation groove 3 is connected to the main body region 1 via an arc-shaped transition section 32. This smooth transition design significantly reduces the stress concentration factor at the edge of the heat dissipation groove 3, preventing fatigue cracks caused by stress concentration. This extends the fatigue life of the flex wheel during long-term operation of the harmonic reducer, making it particularly suitable for applications with extremely high reliability requirements, such as aerospace. Furthermore, because the flex wheel undergoes periodic elastic deformation during operation, the spiral extension design of the heat dissipation groove 3 and the arc-shaped transition section 32 provide space for elastic deformation, preventing cracking or failure of the heat dissipation groove 3 due to excessive deformation.

[0050] As a preferred embodiment of this application, such as Figure 3 or Figure 4 As shown, the cross-section of the heat dissipation groove 3 is V-shaped, so that the heat dissipation groove 3 extends from the middle to both sides along its extension direction.

[0051] Designing the heat dissipation groove 3 with a V-shape significantly improves its heat dissipation performance and structural strength. The V-shaped cross-section of the heat dissipation groove 3 creates a more complex lubricant flow path during flexure rotation, enhancing lubricant coverage and heat dissipation efficiency. The V-shaped cross-section's expansive design guides lubricant flow to both sides, forming a layered lubricating film, further reducing the coefficient of friction and temperature rise. Furthermore, the wider base of the V-shaped cross-section disperses stress, preventing localized strength reduction caused by slotting. In practical applications, this design significantly improves the flexure's heat dissipation performance, especially under high-load conditions, increasing heat dissipation efficiency by 15%-25%. Simultaneously, the V-shaped cross-section structural design also enhances the overall strength of the flexure, preventing fatigue failure caused by excessive slotting.

[0052] As a preferred embodiment of this implementation, such as Figure 5 As shown, multiple drainage channels 4 are provided at intervals on the inner wall of the heat dissipation tank 3. The drainage channels 4 extend from the bottom wall of the heat dissipation tank 3 to the top of the heat dissipation tank 3 to guide the lubricating oil to flow out of the heat dissipation tank 3.

[0053] The design of the drainage channel 4 significantly enhances the fluidity and heat dissipation of the lubricating oil. Extending from the bottom wall to the top of the heat dissipation tank 3, the drainage channel 4 guides the lubricating oil from the bottom to the top, forming a directional lubrication path. This design not only increases the coverage area of ​​the lubricating oil but also enhances the heat dissipation capacity of the heat dissipation tank 3. Due to the presence of the drainage channel 4, the flow of lubricating oil within the heat dissipation tank 3 is more uniform, preventing overheating caused by insufficient local lubrication. Furthermore, the drainage channel 4 increases the inner surface area of ​​the heat dissipation tank 3, further improving heat dissipation efficiency. Simultaneously, the design of the drainage channel 4 reduces lubricating oil waste and improves the economy of the lubrication system. Specifically, Figure 5 The middle indicator line a points to the bottom of the heat sink 3, and the indicator line b points to the top of the heat sink 3. The drainage channel 4 guides the lubricating oil from point a to point b.

[0054] As a preferred example of this embodiment, the depth of the drainage channel 4 is 10%-20% of the depth of the heat dissipation channel 3, and the width of the drainage channel 4 is 10%-15% of the width of the heat dissipation channel 3.

[0055] The depth of the drainage groove 4 is 10%-20% of the depth of the heat dissipation groove 3, and the width is 10%-15% of the width of the heat dissipation groove 3. This size ratio maximizes the flowability of the lubricating oil while ensuring structural strength. Due to the optimized design of the drainage groove 4, the lubricating oil flows more smoothly within the groove, avoiding increased flow resistance caused by excessive groove depth or width. Furthermore, the size ratio of the drainage groove 4 ensures uniform distribution of the lubricating oil within the heat dissipation groove 3, further improving heat dissipation. Simultaneously, the size design of the drainage groove 4 avoids strength loss due to excessive slotting, improving the overall reliability of the flexible wheel.

[0056] In a preferred embodiment of this implementation, the depth of the heat dissipation groove 3 is D1, the wall thickness of the body region 1 is D2, and 0.1≤D1 / D2≤0.25.

[0057] The ratio of the depth D1 of the heat dissipation slot 3 to the wall thickness D2 of the body region 1 is 0.1-0.25. This ratio design has been verified through multiple experiments and achieves the optimal balance between heat dissipation performance and structural strength. Due to the optimized depth ratio of the heat dissipation slot 3, the heat dissipation efficiency of the flexspline under high load conditions is significantly improved, while the overall strength remains unaffected. Furthermore, this design can accommodate the periodic deformation characteristics of the flexspline, preventing cracking or failure of the heat dissipation slot 3 due to excessive deformation. The depth ratio design of the heat dissipation slot 3 can also adapt to various operating conditions, expanding the applicability of the harmonic reducer.

[0058] Preferably, the depth of the heat dissipation groove 3 gradually increases from the side near the arc-shaped transition section 32 to the side near the toothed region 2. This gradient design ensures that high-heat areas (such as the meshing area) receive more heat dissipation area. Due to the gradient depth of the heat dissipation groove 3, the flow of lubricating oil in high-heat areas is smoother, significantly improving heat dissipation. Furthermore, this design can disperse stress and avoid stress concentration caused by abrupt changes in depth. The gradient depth design of the heat dissipation groove 3 also improves the overall strength of the flexible gear, preventing fatigue failure caused by excessive slotting.

[0059] As a preferred embodiment of this application, such as Figure 4 As shown, the bottom of the heat dissipation groove 3 is provided with an elastic support rib 5, and the elastic support rib 5 is spaced apart from the inner wall of the heat dissipation groove 3.

[0060] The elastic support ribs 5 are spaced apart from the inner wall of the heat dissipation groove 3, providing additional support for the heat dissipation groove 3 and preventing cracking or failure of the heat dissipation groove 3 due to deformation of the flexible wheel. Because of the presence of the elastic support ribs 5, the heat dissipation groove 3 will abut against the elastic support ribs when the flexible wheel deforms, and will be better reset by the elastic action of the elastic support ribs 5 when the flexible wheel resets, thereby maintaining the stability of the flexible wheel structure and avoiding local stress concentration caused by excessive deformation. In addition, the elastic support ribs 5 can also disperse stress, reduce the stress concentration coefficient, and improve the overall strength of the flexible wheel. At the same time, the design of the elastic support ribs 5 can also improve the stability of the heat dissipation groove 3, ensuring more uniform flow of lubricating oil within the groove.

[0061] As a preferred embodiment of this implementation, the elastic support rib 5 extends along the extension direction of the heat dissipation groove 3, and the elastic support rib 5 and the heat dissipation groove 3 are integrally formed.

[0062] The elastic support rib 5 extends along the direction of the heat dissipation groove 3, providing uniform support for the heat dissipation groove 3 and avoiding localized stress concentration. Since the elastic support rib 5 and the heat dissipation groove 3 are integrally formed, the manufacturing process is simplified, and production costs are significantly reduced. Furthermore, the integral molding design also prevents the support rib from detaching due to weak connections, improving the reliability of the flexible wheel.

[0063] In a preferred embodiment of this application, the radius of curvature of the arc-shaped transition section 32 is R, where 0.5 mm ≤ R ≤ 2 mm, and the transition angle of the arc-shaped transition section 32 is θ, where 30° ≤ θ ≤ 60°. The radius of curvature R of the arc-shaped transition section 32 is 0.5-2 mm, and the transition angle θ is 30°-60°. This design ensures a smooth connection between the heat dissipation groove 3 and the main body region 1, avoiding stress concentration caused by geometric abrupt changes. Due to the presence of the arc-shaped transition section 32, the flexible wheel can obtain more elastic deformation space during deformation, preventing the heat dissipation groove 3 from failing due to excessive deformation. Furthermore, the arc-shaped transition section 32 can also optimize the flow path of the lubricating oil, ensuring that the lubricating oil covers the heat dissipation groove 3 more evenly.

[0064] In a preferred embodiment of this application, there are multiple heat dissipation grooves 3, which are spaced apart along the outer periphery of the main body.

[0065] Multiple heat dissipation grooves 3 are spaced apart along the outer periphery of the body, which avoids localized strength weakening caused by excessive grooves and ensures a more uniform distribution of the heat dissipation grooves 3. Due to the uniform distribution of the heat dissipation grooves 3, the heat dissipation effect of each area of ​​the flexspline is more balanced during operation, avoiding localized overheating. In addition, the design of multiple heat dissipation grooves 3 can also enhance the flow path of lubricating oil, ensuring that the lubricating oil covers all areas of the flexspline more evenly.

[0066] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0067] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0068] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0069] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0070] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0071] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A harmonic reducer flexure with flexible reinforcing ribs, characterized in that, It includes a main body area and a toothed area. The toothed area is provided with tooth heads. The outer side of the main body area is provided with flexible reinforcing ribs. The flexible reinforcing ribs extend spirally along the circumference of the flexible wheel. The flexible reinforcing ribs are provided with heat dissipation grooves. The angle between the extension direction of the heat dissipation grooves and the rotation direction of the flexible wheel is α, where 15°≤α≤30°. The heat dissipation grooves include heat dissipation sections and arc-shaped transition sections. The heat dissipation sections are connected to the bottom of the main body area through the arc-shaped transition sections.

2. The harmonic reducer flexspline according to claim 1, characterized in that, The heat dissipation groove has a V-shaped cross-section, so that the heat dissipation groove extends from the middle to both sides along its extension direction.

3. The harmonic reducer flexspline according to claim 2, characterized in that, The inner wall of the heat dissipation tank is provided with multiple drainage channels at intervals. The drainage channels extend from the bottom wall of the heat dissipation tank to the top wall of the heat dissipation tank and are used to guide the lubricating oil to flow out of the heat dissipation tank.

4. The harmonic reducer flexspline according to claim 3, characterized in that, The depth of the drainage channel is 10%-20% of the depth of the heat dissipation channel, and the width of the drainage channel is 10%-15% of the width of the heat dissipation channel.

5. The harmonic reducer flexspline according to claim 2, characterized in that, The depth of the heat dissipation groove is D1, and the wall thickness of the main body area is D2, where 0.1≤D1 / D2≤0.

25.

6. The harmonic reducer flexspline according to claim 5, characterized in that, The depth of the heat dissipation groove gradually increases from the side closer to the arc-shaped transition section to the side closer to the toothed area.

7. The harmonic reducer flexspline according to claim 1, characterized in that, The bottom of the heat dissipation groove is provided with elastic support ribs, which are spaced apart from the inner wall of the heat dissipation groove.

8. The harmonic reducer flexspline according to claim 7, characterized in that, The elastic support rib extends along the extension direction of the heat dissipation groove, and the elastic support rib is integrally formed with the heat dissipation groove.

9. The harmonic reducer flexspline according to claim 1, characterized in that, The radius of curvature of the arc-shaped transition section is R, 0.5mm≤R≤2mm, and / or the transition angle of the arc-shaped transition section is θ, 30°≤θ≤60°.

10. The harmonic reducer flexspline according to claim 1, characterized in that, The number of heat dissipation slots is multiple, and the multiple heat dissipation slots are arranged at intervals along the outer periphery of the body area.

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