A lubrication structure for a planetary gear reducer

Abstract

The present invention relates to the technical field of reducers, and discloses a lubrication structure of a planetary gear reducer, including a main body, wherein the main body includes a housing, multiple groups of blocking ring layers and multiple groups of gear rings, and the main body also includes a rotating part arranged in the multiple groups of blocking ring layers and the multiple groups of gear rings, and multiple groups of splashing parts are arranged on the outer side of the rotating part; the splashing part includes a metal needle layer that can rotate with the gear ring, and the metal needle layer is densely needle-shaped and is used to absorb lubricating oil. In the present invention, since the planetary gear and the transmission gear rotate in the same direction, and the sun gear rotates in the opposite direction, the lubricating oil enters the metal needle layer and is absorbed in the metal needle layer, the metal needle layer contacts the planetary gear and produces a shifting effect, and the metal needle layer is shifted, so that the adhered lubricating oil is splashed, and splashed onto the sun gear and the planetary gear, completing a large-scale coating of the lubricating oil, and the splashing effect can be achieved regardless of the change in the rotation speed of the sun gear and the planetary gear.

Description

Technical Field

[0001] The invention relates to the technical field of reducers, and in particular to a lubrication structure for a planetary gear reducer. Background Art

[0002] Planetary gear reducers can use the speed converter of gears to reduce the number of revolutions of the motor (or electric motor) to the required number of revolutions. This is achieved by meshing the gear with fewer teeth on the transmission shaft with the larger gear on the output shaft. The ratio of the number of teeth of the large and small gears is the transmission ratio. This deceleration effect allows planetary gear reducers to be used in mechanical transmission devices that require low speed and high torque.

[0003] When the planetary gear reducer is working, its key components such as gears and bearings will generate a lot of friction. Without proper lubrication, the direct contact between these components will cause severe wear, which will affect the service life and performance of the reducer. The lubrication structure can effectively form a protective film between the gears and bearings to prevent direct contact between metals, thereby significantly reducing friction and wear. Lubricating oil not only has a lubricating effect, but also has anti-rust and cleaning functions. It can prevent the metal parts inside the reducer from rusting, while taking away impurities between components and metal chips generated by wear, keeping the internal environment of the reducer clean and stable.

[0004] At present, the lubrication structure of the planetary gear reducer is generally to design an oil pool at the bottom of the reducer to store lubricating oil. The oil level is generally controlled at a position above the two scale lines of the oil gauge to ensure that the gears can be immersed in oil during operation. However, the lubricating oil cannot contact all positions of the planetary gear reducer. Another method is splashing, which uses the rapid rotation of the gear to splash the lubricating oil to various lubrication points. However, when the gear rotates slowly, the splashing effect cannot be produced. Based on this, an improvement is proposed. Summary of the invention

[0005] The object of the present invention is to provide a planetary gear reducer lubrication structure to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a planetary gear reducer lubrication structure, comprising a main body, the main body comprising a housing, a plurality of blocking ring layers and a plurality of gear rings, the main body further comprising a rotating part arranged in the plurality of blocking ring layers and the plurality of gear rings, the outer side of the rotating part is provided with a plurality of splash parts;

[0007] The splashing part includes a metal needle layer that can rotate with the gear ring. The metal needle layer is in a dense needle shape and is used to absorb the lubricating oil. When the metal needle layer rotates, the lubricating oil is splashed outward.

[0008] Furthermore, the plurality of groups of the blocking ring layers and the plurality of groups of the gear rings overlap each other, and the plurality of groups of the blocking ring layers and the plurality of groups of the gear rings are distributed at intervals, and the plurality of groups of the blocking ring layers and the plurality of groups of the gear rings are all fixed inside the housing;

[0009] The inner diameter of the blocking ring layer is smaller than the inner diameter of the gear ring, and the main body is placed transversely so that the lubricating oil is deposited on the inner side of the gear ring.

[0010] Furthermore, the outer sides of the multiple groups of the blocking ring layers are provided with through-going infiltration holes, the axes of the infiltration holes are parallel to the axes of the blocking ring layers, the transverse extension lines of the infiltration holes are located on the inner sides of the gear rings, and the infiltration holes are used for the passage of lubricating oil, so that the lubricating oil on the inner sides of different gear rings remains the same.

[0011] Further, the rotating part includes a sun gear and a plurality of planetary gears, the plurality of planetary gears are circumferentially distributed on the outer side of the sun gear, and the plurality of planetary gears are meshed with the sun gear, the outer sides of the plurality of planetary gears are meshed with the gear ring, the thickness of the plurality of planetary gears is the same as the thickness of the gear ring, and the plurality of planetary gears are clamped between the blocking ring layers on both sides, and the thickness of the sun gear is also the same as the thickness of the planetary gears;

[0012] A planet carrier is provided on one side of the sun gear and multiple planetary gears, and multiple sleeve shafts are passed through the planet carrier. The multiple sleeve shafts are respectively sleeved in each planetary gear, and a connecting plate layer is fixed on the outer side of the multiple sleeve shafts. A main shaft is fixed at the axial position of the connecting plate layer, and the main shaft is used to be fixed to the next group of sun gears.

[0013] Furthermore, the rotation direction of the sun gear is opposite to that of the planet gears, and the planet carrier is in a symmetrical polygonal shape, with its corners in contact with the inner wall of the blocking ring layer, so as to support multiple planet gears.

[0014] Furthermore, the splash part also includes a fixed layer, a connecting shaft, a transmission gear and a sleeve;

[0015] The fixed layer is fixed to the outside of the planetary carrier, and a connecting shaft is fixed to the end of the fixed layer. The fixed layer is located on one side of the straight edge of the polygonal planetary carrier, and the connecting shaft extends from the inside of the blocking ring layer to the inside of the gear ring. Two transmission gears are provided, and the two transmission gears are rotatably installed on the connecting shaft. The two transmission gears are meshed with the outer gear ring, and the two transmission gears are flush with the two side surfaces of the gear ring respectively. The sleeve is fixed between the two transmission gears, and the sleeve is sleeved on the connecting shaft. The sleeve can rotate with the two transmission gears, and the metal needle layer is fixed on the outside of the sleeve.

[0016] Furthermore, the diameter of one circle of the metal needle layer is larger than the diameter of the transmission gear, the metal needle layer is elastic, and the metal needle layer is bent when in contact with the ring gear. The outer sides of one circle of the metal needle layer are in contact with the planetary gears on both sides, and the rotation direction of one circle of the metal needle layer is the same as that of the planetary gears on both sides. When the metal needle layer and the planetary gears on both sides rotate in the same direction, the metal needle layer is pushed to eject the lubricating oil.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: in the present invention, since the planetary gear and the transmission gear rotate in the same direction, and the sun gear rotates in the opposite direction, the lubricating oil enters the metal needle layer and is adsorbed in the metal needle layer, and the metal needle layer contacts the planetary gear and produces a shifting effect, the metal needle layer is shifted, and the adhered lubricating oil is splashed, and splashed onto the sun gear and the planetary gear, completing the large-scale coating of the lubricating oil, and the splashing effect can be achieved regardless of the change in the rotation speed of the sun gear and the planetary gear;

[0018] The increased specific surface area of ​​the metal needle layer enables the needle-like structure to contact the molecules in the lubricating oil more effectively, thereby increasing the possibility of adsorption. At the same time, the lubricating oil has a certain surface tension, which helps the lubricating oil spread on the surface of the metal needle layer and penetrate into tiny gaps, allowing a large amount of lubricating oil to be adsorbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the half-section structure of the housing, the blocking ring layer and the gear ring of the present invention;

[0022] Figure 3 It is a schematic diagram of the separation structure of the rotating part and the splashing part of the present invention;

[0023] Figure 4 It is a schematic diagram of the main structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the sun gear separation structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the rotation structure of the sun gear and the planetary gear of the present invention;

[0026] Figure 7 It is a schematic diagram of the decomposed structure of the splash part of the present invention.

[0027] In the figure: 1, main body; 11, outer shell; 12, blocking ring layer; 121, infiltration hole; 13, ring gear; 14, rotating part; 141, sun gear; 142, planetary gear; 143, sleeve shaft; 144, planetary carrier; 145, connecting plate layer; 146, main shaft; 15, splashing part; 151, fixed layer; 152, connecting shaft; 153, transmission gear; 154, sleeve; 155, metal needle layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 7 The present invention provides a technical solution: At present, the planetary gear reducer is lubricated by splashing, and a major disadvantage is uneven lubrication. Since the lubricating oil droplets are distributed by the splashing effect of the rotating parts, the distribution of the lubricating oil often depends on the speed and shape of the rotating parts. In the planetary gear reducer, the rotation speed and position of different gears may be different, resulting in some gears or parts may not be fully lubricated, while other parts may be over-lubricated. When the rotation speed of the planetary gear reducer is high, the lubricating oil droplets may not be able to effectively adhere to the gear surface, resulting in a decrease in the lubrication effect. In addition, if the gear clearance is too small or too large, it will also affect the splashing effect and distribution of the lubricating oil. Based on this, a planetary gear reducer lubrication structure is proposed, such as Figure 1 and Figure 2 As shown, it includes a main body 1, the main body 1 includes a shell 11, multiple groups of blocking ring layers 12 and multiple groups of gear rings 13, the main body 1 also includes a rotating part 14 arranged in the multiple groups of blocking ring layers 12 and the multiple groups of gear rings 13, and multiple groups of splashing parts 15 are arranged on the outer side of the rotating part 14, and the splashing parts 15 are used to splash lubricating oil onto the rotating part 14 and the gear ring 13;

[0030] like Figure 3 and Figure 4 As shown, the splashing portion 15 includes a metal needle layer 155 that can rotate with the gear ring 13. The metal needle layer 155 is densely needle-shaped and is used to absorb the lubricating oil. When the metal needle layer 155 rotates, the lubricating oil is splashed outward. When the splashing portion 15 rotates, the metal needle layer 155 generates elasticity that is bent by force, and then resets to splash out the lubricating oil.

[0031] like Figure 3As shown, multiple groups of blocking ring layers 12 and multiple groups of gear rings 13 overlap each other, and multiple groups of blocking ring layers 12 and multiple groups of gear rings 13 are distributed at intervals, and multiple groups of blocking ring layers 12 and multiple groups of gear rings 13 are fixed inside the housing 11. Multiple groups of blocking ring layers 12 are used to limit the rotating part 14, and multiple groups of gear rings 13 are used to achieve multi-stage transmission;

[0032] The inner diameter of the retaining ring layer 12 is smaller than the inner diameter of the gear ring 13. The main body 1 is placed horizontally so that the lubricating oil is deposited on the inner side of the gear ring 13, so that the rotating part 14 is clamped by the retaining ring layers 12 on both sides to achieve position limiting, and its outer side can cooperate with the gear ring 13 to realize the rotation of the rotating part 14.

[0033] like Figure 3 As shown, the outer sides of the multiple groups of blocking ring layers 12 are provided with penetrating wetting holes 121, the axes of the wetting holes 121 are parallel to the axes of the blocking ring layers 12, the lateral extension lines of the wetting holes 121 are located on the inner sides of the gear rings 13, the wetting holes 121 are used for the passage of lubricating oil, so that the lubricating oil on the inner sides of different gear rings 13 remains the same, the wetting holes 121 are used for the passage of lubricating oil, so that the lubricating oil always maintains the same horizontal plane on different gear rings 13, so that different rotating parts 14 are all lubricated.

[0034] like Figure 3 , Figure 4 and Figure 5 As shown, the rotating part 14 includes a sun gear 141 and a plurality of planetary gears 142. The plurality of planetary gears 142 are circumferentially distributed on the outer side of the sun gear 141, and the plurality of planetary gears 142 are all meshed with the sun gear 141. The outer sides of the plurality of planetary gears 142 are meshed with the ring gear 13. The thickness of the plurality of planetary gears 142 is the same as that of the ring gear 13. The plurality of planetary gears 142 are all clamped between the blocking ring layers 12 on both sides. The thickness of the sun gear 141 is also the same as that of the planetary gears 142, so that the rotating part 14 is clamped by the blocking ring layers 12 on both sides, and the stability is improved.

[0035] A planet carrier 144 is provided on one side of the sun gear 141 and the multiple planetary gears 142. A plurality of sleeve shafts 143 are passed through the planet carrier 144. The multiple sleeve shafts 143 are respectively sleeved in each of the planetary gears 142. A connecting plate layer 145 is fixed to the outer side of the multiple sleeve shafts 143. A main shaft 146 is fixed at the axial position of the connecting plate layer 145. The main shaft 146 is used to be fixed to the next group of sun gears 141 to realize the deceleration effect of the planetary gear reducer.

[0036] like Figure 4 and Figure 6 As shown, the rotation direction of the sun gear 141 is opposite to that of the planetary gears 142 , and the planetary carrier 144 is a symmetrical polygonal shape, and its corners are in contact with the inner wall of the blocking ring layer 12 , which is used to support the multiple planetary gears 142 to keep the multiple planetary gears 142 stable.

[0037] like Figure 7 As shown, the splashing part 15 further includes a fixing layer 151, a connecting shaft 152, a transmission gear 153 and a sleeve 154;

[0038] The fixed layer 151 is fixed to the outside of the planetary carrier 144, and a connecting shaft 152 is fixed to the end of the fixed layer 151. The fixed layer 151 is located on one side of the straight edge of the polygonal planetary carrier 144. The connecting shaft 152 extends from the inside of the blocking ring layer 12 to the inside of the ring gear 13. There are two transmission gears 153, and the two transmission gears 153 are both rotatably mounted on the connecting shaft 152. The two transmission gears 153 are both meshed with the outer ring gear 13, and the two transmission gears 153 are flush with the two side surfaces of the ring gear 13 respectively. The sleeve 154 is fixed between the two transmission gears 153, and the sleeve 154 is sleeved on the connecting shaft 152. The sleeve 154 can rotate with the two transmission gears 153. The metal needle layer 155 is fixed on the outside of the sleeve 154, and the metal needle layer 155 is driven to rotate by the transmission gear 153 to realize the rotation of the metal needle layer 155, and the lubricating oil is adsorbed at different positions.

[0039] The diameter of a circle of metal needle layer 155 is larger than the diameter of the transmission gear 153. The metal needle layer 155 is elastic. When the metal needle layer 155 contacts the ring gear 13, it is bent. The outer sides of the metal needle layer 155 contact the planetary gears 142 on both sides, and the metal needle layer 155 rotates in the same direction as the planetary gears 142 on both sides. When the metal needle layer 155 and the planetary gears 142 on both sides rotate in the same direction, the metal needle layer 155 is moved to eject the lubricating oil. In the process of ejecting the lubricating oil, the metal needle layer 155 moves along the circumference of the ring gear 13, and the metal needle layer 155 cannot eject all the internal lubricating oil at one time. The lubricating oil will still splash out after the bounce, so that the lubricating oil can lubricate both the sun gear 141 and the planetary gears 142, and the splashing can be achieved regardless of the rotation speed.

[0040] Working principle of the present invention: When the planetary gear reducer is working, the internal sun gear 141 and the planet gear 142 rotate. Since the planet gear 142 and the transmission gear 153 are meshed with the outer ring gear 13, the rotation directions of the two are consistent, and the internal sun gear 141 rotates in the opposite direction. Figure 6 As shown, Figure 6The arrow in the figure indicates the direction of rotation. Based on this, when the splashing portion 15 rotates, the metal needle layer 155 on the outside can also rotate, and different positions are made to contact the gear ring 13. The contacted metal needle layer 155 is bent, so that the lubricating oil enters the metal needle layer 155 and is adsorbed in the metal needle layer 155. Subsequently, it rotates to the upper end, so that the metal needle layer 155 contacts the planetary gear 142 and produces a shifting effect. The metal needle layer 155 is shifted, so that the adhered lubricating oil is splashed onto the sun gear 141 and the planetary gear 142, completing a large-scale coating of the lubricating oil. Regardless of the changes in the rotation speed of the sun gear 141 and the planetary gear 142, the splashing effect can be achieved.

[0041] Secondly, the increased specific surface area of ​​the metal needle layer 155 enables the needle-like structure to contact the molecules in the lubricating oil more effectively, thereby increasing the possibility of adsorption. At the same time, the lubricating oil has a certain surface tension, which enables it to form a thin film when it contacts the metal needle layer 155. The surface tension helps the lubricating oil to spread on the surface of the metal needle layer 155 and penetrate into tiny gaps, so that a large amount of lubricating oil is adsorbed.

[0042] In addition, when the sun gear 141 is rotating, the lubricating oil covers the sun gear 141 more quickly, and the lubrication degree is high.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A planetary gear reducer lubrication structure, comprising a main body (1), characterized in that: The main body (1) comprises an outer shell (11), a plurality of groups of blocking ring layers (12) and a plurality of groups of gear rings (13); the main body (1) further comprises a rotating part (14) arranged inside the plurality of groups of blocking ring layers (12) and the plurality of groups of gear rings (13); and a plurality of groups of splashing parts (15) are arranged outside the rotating part (14); The splashing portion (15) comprises a metal needle layer (155) that can rotate along with the gear ring (13); the metal needle layer (155) is densely needle-shaped and is used to absorb lubricating oil; when the metal needle layer (155) rotates, the lubricating oil is splashed outwards; The rotating part (14) comprises a sun gear (141) and a plurality of planetary gears (142); a planet carrier (144) is provided on one side of the sun gear (141) and the plurality of planetary gears (142); The splashing portion (15) further comprises a fixing layer (151), a connecting shaft (152), a transmission gear (153) and a sleeve (154); The fixed layer (151) is fixed to the outside of the planet carrier (144); a connecting shaft (152) is fixed to the end of the fixed layer (151); the fixed layer (151) is located on one side of the straight edge of the polygonal planet carrier (144); the connecting shaft (152) extends from the inside of the blocking ring layer (12) to the inside of the gear ring (13); two transmission gears (153) are provided, and the two transmission gears (153) are rotatably mounted on the connecting shaft (152). The two transmission gears (153) are meshed with the outer gear ring (13), and the two transmission gears (153) are respectively flush with the two side surfaces of the gear ring (13); the sleeve (154) is fixed between the two transmission gears (153); the sleeve (154) is sleeved on the connecting shaft (152); the sleeve (154) can rotate with the two transmission gears (153); and the metal needle layer (155) is fixed on the outer side of the sleeve (154).

2. The lubrication structure of the planetary gear reducer according to claim 1, characterized in that: The plurality of groups of blocking ring layers (12) and the plurality of groups of gear rings (13) are overlapped with each other, and the plurality of groups of blocking ring layers (12) and the plurality of groups of gear rings (13) are distributed at intervals, and the plurality of groups of blocking ring layers (12) and the plurality of groups of gear rings (13) are all fixed inside the outer shell (11); The inner diameter of the blocking ring layer (12) is smaller than the inner diameter of the gear ring (13), and the main body (1) is placed transversely so that the lubricating oil is deposited on the inner side of the gear ring (13).

3. The lubrication structure of the planetary gear reducer according to claim 2, characterized in that: The outer sides of the plurality of groups of the blocking ring layers (12) are provided with penetrating wetting holes (121), the axes of the wetting holes (121) are parallel to the axes of the blocking ring layers (12), the transverse extension lines of the wetting holes (121) are located on the inner sides of the gear rings (13), and the wetting holes (121) are used for lubricating oil to pass through, so that the lubricating oil inside different gear rings (13) remains the same.

4. The lubrication structure of the planetary gear reducer according to claim 2, characterized in that: The plurality of planetary gears (142) are circumferentially distributed on the outside of the sun gear (141), and the plurality of planetary gears (142) are all meshed with the sun gear (141), the outer sides of the plurality of planetary gears (142) are meshed with the gear ring (13), the thickness of the plurality of planetary gears (142) is the same as the thickness of the gear ring (13), and the plurality of planetary gears (142) are all clamped between the blocking ring layers (12) on both sides, and the thickness of the sun gear (141) is also the same as the thickness of the planetary gears (142); A plurality of sleeve shafts (143) are inserted into the planet carrier (144), and the plurality of sleeve shafts (143) are respectively sleeved in respective planetary gears (142). A connecting plate layer (145) is fixed to the outer side of the plurality of sleeve shafts (143), and a main shaft (146) is fixed at the axial position of the connecting plate layer (145). The main shaft (146) is used to be fixed to the sun gear (141) of the next group.

5. The lubrication structure of the planetary gear reducer according to claim 4, characterized in that: The rotation direction of the sun gear (141) is opposite to that of the planet gears (142); the planet carrier (144) is symmetrically polygonal, with its corners in contact with the inner wall of the blocking ring layer (12), and is used to support the plurality of planet gears (142).

6. The lubrication structure of the planetary gear reducer according to claim 1, characterized in that: The diameter of the metal needle layer (155) of one circle is larger than the diameter of the transmission gear (153), the metal needle layer (155) is elastic, and the metal needle layer (155) is bent when in contact with the gear ring (13), the outer sides of the metal needle layer (155) of one circle are in contact with the planetary gears (142) on both sides, and the rotation direction of the metal needle layer (155) of one circle is the same as that of the planetary gears (142) on both sides, and when the metal needle layer (155) and the planetary gears (142) on both sides rotate in the same direction, the metal needle layer (155) is moved to eject the lubricating oil.

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