Cam roller rotation structure for robot base
Patent Information
- Application Number
- CN202611368161.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-04
- Publication Date
- 2026-10-30
AI Technical Summary
若热量无法及时散出，机构内部温度会逐步累积升高，不仅会加剧凸轮与滚子接触面磨损，降低凸轮滚子的工作效率、缩短其使用寿命，还易引发热变形问题，造成传动间隙偏移，回转精度发生漂移，进而影响基座回转机构整体运行可靠性
箱体内部灌注有润滑油，该润滑油能够在蜗杆与第一滚子工作过程中对二者进行降温，既可以降低蜗杆与第一滚子之间的摩擦，减少部件磨损，保障工作连续性与工作效率，提升蜗杆、第一滚子的工作效率并延长使用寿命，以此保障整个回转机构的整体运行可靠性；与此同时，设置的多组导热柱与导热套相互配合，可将润滑油携带的热量传导至导热管，再经由导热管的导热通道将热量散出，实现对蜗杆、第一滚子的二次降温；连接杆工作时带动第二旋转轮转动，经由第二旋转轮、第一旋转轮以及传动带的传动配合，驱动旋转杆带动旋转盘与多组第二滚子同步转动，多组第二滚子转动过程中与驱动槽相配合，驱动主动滚轮运转，再通过主动滚轮、从动滚轮与传输带的传动，驱使多组凸板运动，运动的多组凸板可快速将导热通道内部蓄积的热量带出，进一步实现对蜗杆、第一滚子的散热降温；其中，多组凸板的驱动动力来源于蜗杆与第一滚子的啮合运动，无需额外配置动力设备，降低装置整体购置成本与使用成本；综上所述，本发明设置三级散热方式，对蜗杆、第一滚子散热效果优异，能够使蜗杆、第一滚子工作时维持最优工作温度，提升二者工作效率、延长使用寿命，保障回转机构整体运行可靠性。
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Figure CN123000927A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of robot base transmission structure technology, and in particular to a cam roller rotation structure for robot base. Background Technology
[0002] The base rotation mechanism of industrial robots and collaborative robots is a core transmission component of the entire robot. It primarily handles the robot's 360° rotation and attitude adjustment, directly determining the robot's positioning accuracy, repeatability, and overall operational stability. It is widely used in various work scenarios such as assembly, handling, and grinding. Current base rotation mechanisms in industrial and collaborative robots rely on the interaction of cams and rollers to achieve rotational motion. However, these mechanisms lack corresponding cooling structures. During the high-speed reciprocating meshing of the cams and rollers, friction and compression continuously generate heat. If this heat cannot be dissipated in time, the internal temperature of the mechanism will gradually accumulate and rise. This not only accelerates the wear of the cam-roller contact surface, reducing the working efficiency of the cams and rollers and shortening their service life, but also easily leads to thermal deformation, causing transmission clearance deviation, and drifting rotational accuracy, ultimately affecting the overall operational reliability of the base rotation mechanism. Summary of the Invention
[0003] The purpose of this invention is to provide a cam roller rotation structure for a robot base to solve the problems mentioned above.
[0004] The objective of this invention can be achieved through the following technical solution: a cam-roller rotary structure for a robot base, comprising: A slewing assembly, comprising a housing, a base fixed to the bottom of the housing, a sealing cover installed on the top of the housing, two sets of first mounting holes symmetrically opened on the outer wall of the housing, two sets of first bearings respectively installed inside the two sets of first mounting holes, and a worm gear fixed to the inner ring of the two sets of first bearings, wherein the worm gear is driven by a motor installed on the outer wall of the housing. It also includes a second mounting hole opened on the top of the sealing cover, a second bearing installed inside the second mounting hole, a connecting rod fixed to the inner ring of the second bearing, a connecting disc and a connecting wheel respectively fixed to both ends of the connecting rod, and multiple sets of first rollers installed on the outer wall of the connecting wheel and meshing with the worm gear; A cooling assembly, the cooling assembly including lubricating oil supplied to the interior of the housing; It also includes two sets of mounting slots symmetrically opened on the outer wall of the box, heat-conducting pipes installed inside the two sets of mounting slots, heat-conducting channels set inside the heat-conducting pipes, and heat-conducting components set on the outer wall of the heat-conducting pipes and located inside the box.
[0005] Preferably, the heat-conducting component includes a heat-conducting sleeve fitted onto the outer wall of the heat-conducting pipe, and multiple sets of heat-conducting columns fixed to the outer wall of the heat-conducting sleeve.
[0006] Preferably, both the first bearing and the second bearing are designed with a sealed seal.
[0007] Preferably, the cooling assembly further includes a heat dissipation unit and a drive unit; The heat dissipation unit includes two sets of support plates fixed to the top of the base, two sets of third mounting holes respectively opened on the outer wall of the two sets of support plates, two sets of third bearings respectively installed inside the two sets of third mounting holes, driving rollers and driven rollers respectively fixed to the inner rings of the two sets of third bearings, a transmission belt sleeved on the outside of the driving rollers and driven rollers, and multiple sets of protruding plates installed on the surface of the transmission belt.
[0008] Preferably, the transmission path of the conveyor belt passes through a heat-conducting channel.
[0009] Preferably, the drive unit includes a drive wheel fixed to the end of the drive roller, and multiple sets of drive grooves formed on the outer wall of the drive wheel; It also includes an L-shaped strip fixed to the top of the base, a fourth mounting hole opened at the top of the L-shaped strip, a fourth bearing installed inside the fourth mounting hole, a drive rod fixed to the inner ring of the fourth bearing, a first rotating wheel and a rotating disk fixed to both ends of the drive rod, and multiple sets of second rollers installed on the outer wall of the rotating disk and meshing with the drive groove. It also includes a second rotating wheel fixed to the outer wall of the connecting rod, and a transmission belt sleeved on the outer walls of the first and second rotating wheels.
[0010] The beneficial effects of this invention are: The housing is filled with lubricating oil, which cools the worm and the first roller during operation. This reduces friction between the worm and the first roller, minimizes component wear, ensures continuous operation and efficiency, and extends the service life of the worm and the first roller, thus guaranteeing the overall reliability of the rotary mechanism. Simultaneously, multiple sets of heat-conducting columns and sleeves work together to transfer the heat carried by the lubricating oil to the heat-conducting pipes, which then dissipate the heat through their heat-conducting channels, achieving secondary cooling of the worm and the first roller. When the connecting rod operates, it drives the second rotating wheel to rotate. Through the transmission of the second rotating wheel, the first rotating wheel, and the drive belt, the rotating rod drives the rotating disk and multiple sets of second rollers... The first roller rotates synchronously, and multiple sets of second rollers cooperate with the drive groove during rotation to drive the active roller. Then, through the transmission of the active roller, driven roller, and conveyor belt, multiple sets of convex plates are driven to move. The moving convex plates can quickly carry away the heat accumulated inside the heat conduction channel, further achieving heat dissipation and cooling of the worm and the first roller. The driving power of the multiple sets of convex plates comes from the meshing motion of the worm and the first roller, eliminating the need for additional power equipment and reducing the overall purchase and operating costs of the device. In summary, this invention sets up a three-stage heat dissipation method, which has excellent heat dissipation effect on the worm and the first roller, enabling the worm and the first roller to maintain the optimal working temperature during operation, improving their working efficiency, extending their service life, and ensuring the overall operational reliability of the rotary mechanism. Attached Figure Description
[0011] The invention will now be further described with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the first rotating wheel, the second rotating wheel, and the transmission belt structure in this invention; Figure 3 This is a schematic diagram of the internal structure of the box in this invention; Figure 4 This is a schematic diagram of the multiple sets of convex plate structures in this invention; Figure 5 This is a schematic diagram of the heat-conducting component structure in this invention; Figure 6 This is a schematic diagram of the mounting slot structure in this invention.
[0012] Legend: 11. Base; 12. Housing; 13. Sealing cover; 14. First mounting hole; 15. First bearing; 16. Worm gear; 17. Motor; 18. Second mounting hole; 19. Second bearing; 110. Connecting rod; 111. Connecting disc; 112. Connecting wheel; 113. First roller; 21. Mounting groove; 22. Heat-conducting pipe; 23. Heat-conducting sleeve; 24. Heat-conducting column; 25. Support plate; 26. Third mounting hole; 27. Third bearing; 28. Driving roller; 29. Driven roller; 210. Conveyor belt; 211. Convex plate; 212. Drive wheel; 213. Drive groove; 214. L-shaped strip; 215. Fourth mounting hole; 216. Fourth bearing; 217. Drive rod; 218. First rotating wheel; 219. Second rotating wheel; 220. Transmission belt; 221. Rotary disc; 222. Second roller. Detailed Implementation
[0013] The technical solutions of the embodiments 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, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0014] The background of this invention is that the base rotation mechanism of existing industrial robots and collaborative robots relies on the cooperation of cam rollers to achieve rotational motion. However, the base rotation mechanism is not equipped with a corresponding cooling structure. During operation, the cam rollers continuously generate heat. If the heat cannot be dissipated in time, it will reduce the working efficiency of the cam rollers, shorten their service life, and thus affect the overall operational reliability of the base rotation mechanism. The technical solution of this invention is to solve the technical problem that the base rotation mechanism of existing industrial robots and collaborative robots relies on the cooperation of cam rollers to achieve rotational motion. The base rotation mechanism is not equipped with a corresponding cooling structure, and the cam rollers continuously generate heat during operation. If the heat cannot be dissipated in time, it will easily reduce the working efficiency of the cam rollers, shorten their service life, and thus affect the overall operational reliability of the base rotation mechanism.
[0015] Please see Figures 1-6As shown, this embodiment is a cam roller rotary structure for a robot base, including: a rotary assembly, which includes a housing 12, a base 11 fixed to the bottom of the housing 12, a sealing cover 13 installed on the top of the housing 12, two sets of first mounting holes 14 symmetrically opened on the outer wall of the housing 12, two sets of first bearings 15 respectively installed inside the two sets of first mounting holes 14, and worm gears 16 fixed to the inner rings of the two sets of first bearings 15, wherein the worm gears 16 are driven by a motor 17 installed on the outer wall of the housing 12; it also includes a second mounting hole 18 opened on the top of the sealing cover 13, a second bearing 19 installed inside the second mounting hole 18, a connecting rod 110 fixed to the inner ring of the second bearing 19, a connecting disc 111 and a connecting wheel 112 respectively fixed to both ends of the connecting rod 110, and multiple sets of first rollers 113 installed on the outer wall of the connecting wheel 112 and meshing with the worm gear 16; a cooling assembly, which includes lubricating oil poured into the housing 12; and also includes symmetrically opened on the outer wall of the housing 12. The outer wall of the body 12 has two sets of mounting slots 21, heat-conducting pipes 22 installed inside the two sets of mounting slots 21, heat-conducting channels set inside the heat-conducting pipes 22, and heat-conducting components set on the outer wall of the heat-conducting pipes 22 and located inside the housing 12. The heat-conducting components include a heat-conducting sleeve 23 sleeved on the outer wall of the heat-conducting pipes 22, and multiple sets of heat-conducting columns 24 fixed to the outer wall of the heat-conducting sleeve 23. The first bearing 15 and the second bearing 19 are both sealed. The cooling assembly also includes a heat dissipation unit and a drive unit. The heat dissipation unit includes... Two sets of support plates 25 are fixed to the top of the base 11. Two sets of third mounting holes 26 are respectively opened on the outer wall of the two sets of support plates 25. Two sets of third bearings 27 are respectively installed inside the two sets of third mounting holes 26. The driving rollers 28 and driven rollers 29 are respectively fixed to the inner ring of the two sets of third bearings 27. The conveyor belt 210 is sleeved on the outside of the driving rollers 28 and driven rollers 29. Multiple sets of protruding plates 211 are installed on the surface of the conveyor belt 210. The conveying path of the conveyor belt 210 passes through the heat conduction channel.
[0016] Specifically, the housing 12 is filled with lubricating oil, which can cool the worm gear 16 and the first roller 113 during operation. This reduces friction between the worm gear 16 and the first roller 113, reduces component wear, ensures continuous operation and efficiency, improves the working efficiency of the worm gear 16 and the first roller 113, and extends their service life, thereby ensuring the overall operational reliability of the entire rotary mechanism. At the same time, multiple sets of heat-conducting columns 24 and heat-conducting sleeves 23 work together to conduct the heat carried by the lubricating oil to the heat-conducting pipes 22, and then dissipate the heat through the heat-conducting channels of the heat-conducting pipes 22, achieving secondary cooling of the worm gear 16 and the first roller 113.
[0017] The first bearing 15 and the second bearing 19 adopt a sealed design, which significantly improves the overall sealing performance of the housing 12. This sealing structure can seal the assembly gap at the positions of the first bearing 15 and the second bearing 19, effectively preventing the lubricating oil contained in the housing 12 from overflowing and leaking out from the positions of the first bearing 15 and the second bearing 19, reducing lubricating oil leakage, reducing lubricating oil consumption, and avoiding resource waste. At the same time, it eliminates the problem of external oil pollution caused by lubricating oil leakage. The lubricating oil level in the housing 12 is kept stable, which can continuously and reliably wet the worm 16 and the first roller 113, giving full play to the cooling and heat dissipation and lubrication effects of the lubricating oil, alleviating the frictional heat generated when the worm 16 and the first roller 113 mesh and rotate, reducing component wear, and helping to extend the service life of core transmission components such as the worm 16 and the first roller 113, ensuring the long-term stable operation of the rotating structure.
[0018] Please see Figures 1-4 As shown, the drive unit includes a drive wheel 212 fixed to the end of the drive roller 28, and multiple sets of drive grooves 213 formed on the outer wall of the drive wheel 212; it also includes an L-shaped strip 214 fixed to the top of the base 11, a fourth mounting hole 215 formed on the top of the L-shaped strip 214, a fourth bearing 216 installed inside the fourth mounting hole 215, a drive rod 217 fixed to the inner ring of the fourth bearing 216, a first rotating wheel 218 and a rotating disk 221 fixed to both ends of the drive rod 217, and multiple sets of second rollers 222 installed on the outer wall of the rotating disk 221 and meshing with the drive grooves 213; it also includes a second rotating wheel 219 fixed to the outer wall of the connecting rod 110, and a transmission belt 220 sleeved on the outer wall of the first rotating wheel 218 and the second rotating wheel 219.
[0019] Specifically, continuing from the previous text, when the connecting rod 110 is working, it drives the second rotating wheel 219 to rotate. Through the transmission cooperation of the second rotating wheel 219, the first rotating wheel 218, and the transmission belt 220, the rotating rod drives the rotating disk 221 and multiple sets of second rollers 222 to rotate synchronously. During the rotation of the multiple sets of second rollers 222, they cooperate with the driving groove 213 to drive the driving roller 28 to rotate. Then, through the transmission of the driving roller 28, the driven roller 29, and the transmission belt 210, multiple sets of convex plates 211 are driven to move. The moving multiple sets of convex plates 211 can quickly heat the interior of the heat conduction channel. The accumulated heat is dissipated, further cooling the worm 16 and the first roller 113. The driving force of the multiple sets of convex plates 211 originates from the meshing motion of the worm 16 and the first roller 113, eliminating the need for additional power equipment and reducing the overall purchase and operating costs of the device. In summary, this invention employs a three-stage heat dissipation method, providing excellent heat dissipation for the worm 16 and the first roller 113. This ensures that the worm 16 and the first roller 113 maintain optimal operating temperatures during operation, improving their efficiency, extending their service life, and guaranteeing the overall reliability of the rotary mechanism.
[0020] Working principle: The robot is mounted on the connecting plate 111, and the motor 17 is started. The motor 17 drives the worm gear 16 to rotate. During the rotation of the worm gear 16, it meshes with multiple sets of first rollers 113, driving the connecting wheel 112 to rotate synchronously. The connecting wheel 112 drives the robot to rotate via the connecting rod 110 and the connecting plate 111, thereby realizing the robot's rotary motion. First, lubricating oil is filled into the housing 12. The lubricating oil can cool the worm gear 16 and the first rollers 113 during operation, improve the working efficiency of the worm gear 16 and the first rollers 113, extend their service life, and thus ensure the overall reliability of the rotary mechanism. At the same time, the lubricating oil also reduces the friction of the worm gear 16 and the first rollers 113. The friction force serves two purposes: firstly, it reduces wear between the components, extending their service life; secondly, it ensures the continuity and efficiency of the worm gear 16 and the first roller 113's operation. Thirdly, with the cooperation of multiple sets of heat-conducting columns 24 and heat-conducting sleeves 23, the heat from the lubricating oil is transferred to the heat-conducting pipes 22. The heat-conducting pipes 22, in conjunction with their heat-conducting channels, dissipate the heat from the lubricating oil, further cooling the worm gear 16 and the first roller 113. Finally, when the connecting rod 110 operates, it drives the second rotating wheel 219 to rotate. With the cooperation of the second rotating wheel 219, the first rotating wheel 218, and the transmission belt 220, the rotating rod drives the rotating disk 221 and multiple sets of second rollers 222 to rotate. When the second roller 222 rotates, it works with the drive groove 213 to drive the drive roller 28 to rotate. With the cooperation of the drive roller 28, the driven roller 29, and the conveyor belt, multiple sets of convex plates 211 move. These convex plates 211, during their movement, rapidly carry away heat from the heat conduction channel, further cooling the worm gear 16 and the first roller 113. Furthermore, the driving power source for the multiple sets of convex plates 211 comes from the meshing motion of the worm gear 16 and the first roller 113, so no additional power equipment is needed, reducing overall purchase and operating costs. In summary, compared to existing methods, this invention provides three heat dissipation methods, resulting in higher heat dissipation efficiency for the worm gear 16 and the first roller 113. This ensures that the worm gear 16 and the first roller 113 maintain optimal temperatures during operation, improving their working efficiency and extending their service life, thereby guaranteeing the overall operational reliability of the entire rotary mechanism. The first bearing 15 and the second bearing 19 employ a sealed design, significantly improving the overall sealing performance of the housing 12. This sealing structure effectively seals the assembly gaps at the positions of the first bearing 15 and the second bearing 19, preventing the lubricating oil contained within the housing 12 from leaking outwards from these positions, reducing lubricating oil leakage and consumption, and avoiding resource waste. Simultaneously, it eliminates the problem of external oil contamination of the housing 12 caused by lubricating oil leakage.The lubricating oil level inside the housing 12 is maintained stably, ensuring continuous and reliable lubrication of the worm gear 16 and the first roller 113. This fully utilizes the cooling and lubricating properties of the lubricating oil, reducing frictional heat generated during the meshing rotation of the worm gear 16 and the first roller 113, minimizing component wear, and extending the service life of core transmission components such as the worm gear 16 and the first roller 113. This ensures the long-term stable operation of the rotating structure.
[0021] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.
Claims
1. A cam-roller rotary structure for a robot base, characterized in that, include: The rotary assembly includes a housing (12), a base (11) fixed to the bottom of the housing (12), a sealing cover (13) installed on the top of the housing (12), two sets of first mounting holes (14) symmetrically opened on the outer wall of the housing (12), two sets of first bearings (15) respectively installed inside the two sets of first mounting holes (14), and a worm (16) fixed to the inner ring of the two sets of first bearings (15), wherein the worm (16) is driven by a motor (17) installed on the outer wall of the housing (12); It also includes a second mounting hole (18) opened on the top of the sealing cover (13), a second bearing (19) installed inside the second mounting hole (18), a connecting rod (110) fixed to the inner ring of the second bearing (19), a connecting disc (111) and a connecting wheel (112) respectively fixed to both ends of the connecting rod (110), and multiple sets of first rollers (113) installed on the outer wall of the connecting wheel (112) and meshing with the worm (16); A cooling assembly, the cooling assembly including lubricating oil filled into the housing (12); It also includes two sets of mounting slots (21) symmetrically opened on the outer wall of the box (12), heat-conducting pipes (22) installed inside the two sets of mounting slots (21), heat-conducting channels set inside the heat-conducting pipes (22), and heat-conducting components set on the outer wall of the heat-conducting pipes (22) and located inside the box (12).
2. The cam roller rotary structure for a robot base according to claim 1, characterized in that, The heat-conducting component includes a heat-conducting sleeve (23) fitted onto the outer wall of the heat-conducting pipe (22), and multiple sets of heat-conducting columns (24) fixed to the outer wall of the heat-conducting sleeve (23).
3. The cam-roller rotary structure for a robot base according to claim 1, characterized in that, Both the first bearing (15) and the second bearing (19) are designed with a sealed seal.
4. The cam-roller rotary structure for a robot base according to claim 1, characterized in that, The cooling assembly also includes a heat dissipation unit and a drive unit; The heat dissipation unit includes two sets of support plates (25) fixed to the top of the base (11), two sets of third mounting holes (26) respectively opened on the outer wall of the two sets of support plates (25), two sets of third bearings (27) respectively installed inside the two sets of third mounting holes (26), driving rollers (28) and driven rollers (29) respectively fixed to the inner ring of the two sets of third bearings (27), a transmission belt (210) sleeved on the outside of the driving rollers (28) and driven rollers (29), and multiple sets of protruding plates (211) installed on the surface of the transmission belt (210).
5. The cam roller rotary structure for a robot base according to claim 4, characterized in that, The transmission path of the conveyor belt (210) passes through a heat conduction channel.
6. The cam-roller rotary structure for a robot base according to claim 4, characterized in that, The drive unit includes a drive wheel (212) fixed to the end of the drive roller (28) and multiple drive grooves (213) formed on the outer wall of the drive wheel (212); It also includes an L-shaped strip (214) fixed to the top of the base (11), a fourth mounting hole (215) opened on the top of the L-shaped strip (214), a fourth bearing (216) installed inside the fourth mounting hole (215), a drive rod (217) fixed to the inner ring of the fourth bearing (216), a first rotating wheel (218) and a rotating disk (221) fixed to both ends of the drive rod (217), and multiple sets of second rollers (222) installed on the outer wall of the rotating disk (221) and meshing with the drive groove (213); It also includes a second rotating wheel (219) fixed to the outer wall of the connecting rod (110) and a transmission belt (220) sleeved on the outer wall of the first rotating wheel (218) and the second rotating wheel (219).