Planetary speed reducing mechanism with liquid leakage prevention structure

Abstract

The utility model relates to the field of planetary transmission mechanisms, in particular to a planetary reducing mechanism with a liquid leakage prevention structure, which comprises a shell and an internal transmission component, an inner cavity is arranged in the shell, the transmission component is arranged in the inner cavity and comprises a sun gear, a plurality of planet gears and a planet carrier, one planet gear is an output planet gear, and the other planet gear is an output planet gear. The center of the output planet wheel is of a cylindrical hollow structure, a stirring rod is arranged at the bottom of the shell, the top end of the stirring rod extends to the center of the output planet wheel to be connected, an oil seal cover is arranged at the top end of the output planet wheel, and the oil seal cover covers the stirring rod. And the oil seal cover can cover the joint between the stirring rod and the output planet wheel to form an isolated structure, so that a lubricant is effectively prevented from flowing into a food vessel along the joint between the output planet wheel and the stirring rod.

Description

Technical Field

[0001] The utility model relates to the field of planetary transmission mechanisms, in particular to a planetary speed reduction mechanism with a liquid leakage-proof structure. Background Art

[0002] The food mixer is a full gear transmission structure, and its power transmission system has a high standard design, high strength, high technical requirements, smooth operation, and is durable. The food mixer can be used to stir cream, cake batter, fillings, egg beating, and dough, etc. The food mixer is generally equipped with a planetary gear transmission mechanism to reduce the output of the motor and increase the torque to transmit it to the stirring rod.

[0003] A planetary gear transmission mechanism refers to a gear transmission mechanism composed of a planetary gear system. Planetary gear transmission mechanisms are widely used in industry. In order to achieve a larger transmission ratio, a multi-stage transmission method is generally adopted, generally including a sun gear, planetary gears, a ring gear and a planet carrier. The planetary gears are driven by the first-stage sun gear to rotate and revolve along the first inner ring gear, thereby driving the first-stage planet carrier to rotate, reducing the speed and increasing the torque for output. It is generally used in mixing equipment such as mixers.

[0004] Lubricants or lubricating oils are generally added to the existing planetary gear transmission mechanism to lubricate the gears in the planetary gear transmission mechanism, which plays a role in maintaining and preventing the gears from oxidation. However, when the mixing shaft of the food mixer is disassembled, the lubricants or lubricating oils inside the planetary gear transmission mechanism will flow into the food container of the food mixer along the installation interface of the mixing shaft, causing pollution to the food container. Therefore, in view of these current situations, it is urgent to develop a planetary reduction mechanism with a liquid-proof structure to meet the needs of actual use. Summary of the invention

[0005] The utility model aims to provide a planetary reduction mechanism with a liquid leakage-proof structure, which is used to solve the defect that when the mixing shaft of the food mixer is disassembled, the lubricant or lubricating oil inside the planetary gear transmission mechanism will flow into the food container of the food mixer along the installation interface of the mixing shaft.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A planetary reduction mechanism with a liquid leakage-proof structure comprises an outer shell and an internal transmission component, the interior of the outer shell is an inner cavity, the transmission component is arranged in the inner cavity, the transmission component comprises a sun gear, a plurality of planetary gears and a planetary carrier, the planetary carrier is rotatably arranged at the center of the inner cavity, the sun gear is rotatably arranged at the center of the planetary carrier, the plurality of planetary gears are rotatably arranged at the periphery of the planetary carrier, and the inner sides of the plurality of planetary gears are all meshed with the side wall of the sun gear for transmission, one of the planetary gears is an output planetary gear, the center of the output planetary gear is a cylindrical hollow structure, a stirring rod is arranged at the bottom of the outer shell, the top end of the stirring rod extends to the center of the output planetary gear for connection, an oil seal cover is arranged at the top end of the output planetary gear, the bottom of the oil seal cover is a snap-fit ​​opening, the oil seal cover is fixedly connected to the top end of the output planetary gear through the snap-fit ​​opening, and the oil seal cover covers the top of the stirring rod.

[0008] In the above description, as a further solution, an output through hole is opened on the periphery of the planet carrier, and the bottom end of the output planetary gear is a raised plug-in cam, and the output planetary gear is rotatably connected to the output through hole through the plug-in cam.

[0009] In the above description, as a further solution, a plurality of planetary mounting shafts are provided on the periphery of the planetary carrier, and the centers of the planetary wheels are rotatably sleeved inside the planetary mounting shafts.

[0010] In the above description, as a further solution, the top of the sun gear is the first gear part, the bottom of the sun gear is the second gear part, the inner sides of several planetary gears and the output planetary gears are meshed with the second gear part for transmission, and a connecting through hole is opened on one side of the bottom shell, and the connecting through hole is opened at the same horizontal height as the first gear part.

[0011] In the above description, as a further solution, a vertically upward central mounting shaft is provided in the center of the planetary carrier, a plug-in through hole is opened in the middle of the sun gear, the plug-in through hole passes through the first gear part and the second gear part, and the sun gear is rotatably plugged into the central mounting shaft through the plug-in through hole.

[0012] In the above description, as a further solution, a gear ring groove is opened on the side wall of the inner cavity, and the gear ring groove is distributed in an annular structure with the planet carrier as the center, and the outer sides of several planetary wheels are meshed with the gear ring groove for transmission.

[0013] In the above description, as a further solution, the second gear portion is a bevel gear structure, the axial directions of the planetary mounting shaft and the output through hole are both tilted outward, and the cross-sectional structure of the gear ring groove is an inverted frustum-shaped structure.

[0014] In the above description, as a further solution, the first gear portion is a helical gear.

[0015] In the above description, as a further solution, the outer shell is composed of a bottom shell and a top cover, the gear ring groove is opened on the inner wall of the bottom shell, the transmission assembly is rotatably arranged inside the bottom shell, and when the top cover is fixedly connected, the top cover can cover the top of the transmission assembly.

[0016] The beneficial effects produced by the utility model are as follows:

[0017] The present application discloses a planetary reduction mechanism with a liquid leakage-proof structure, in which an oil seal cover is provided at the top end of the output planetary wheel. When the oil seal cover is connected to the top end of the output planetary wheel, the oil seal cover covers the top of the stirring rod, so that when the stirring shaft is disassembled, the oil seal cover can cover the connection between the stirring rod and the output planetary wheel to form an isolation structure, thereby effectively preventing the lubricant from flowing into the food container along the connection between the output planetary wheel and the stirring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a planetary reduction mechanism with a liquid leakage-proof structure according to the utility model;

[0019] Figure 2 This is a schematic diagram of the structure decomposition of a planetary reduction mechanism with a liquid leakage-proof structure according to the utility model;

[0020] Figure 3 This is a schematic structural sectional view of a planetary reduction mechanism with a liquid leakage-proof structure according to the utility model;

[0021] Figure 4 for Figure 3 A is a schematic diagram of the partially enlarged structure of the middle part;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of a planetary reduction mechanism with a liquid leakage-proof structure in an assembled state according to the utility model;

[0023] In the figure: 1-housing, 11-bottom housing, 12-top cover, 111-inner cavity, 112-gear ring groove, 113-connecting through hole, 3-sun gear, 31-first gear part, 32-second gear part, 33-plug-in through hole, 4-planetary gear, 41-output planetary gear, 42-plug-in cam shaft, 5-planet carrier, 51-planetary mounting shaft, 52-center mounting shaft, 53-output through hole, 6-stirring rod, 7-oil seal cover, 71-snap-in opening. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0025] See also Figure 1-5 The embodiment of the present invention is a planetary reduction mechanism with a liquid-leakage-proof structure, comprising a housing 1 and an internal transmission component, wherein the interior of the housing 1 is an inner cavity 111, the housing 1 is composed of a bottom housing 11 and a top cover 12, a gear ring groove 112 is opened on the inner wall of the bottom housing 11, the transmission component is rotatably arranged inside the bottom housing 11, when the top cover 12 is fixedly connected with the top cover 12, the top cover 12 can cover the top of the transmission component, the transmission component is arranged in the inner cavity 111, the transmission component comprises a sun gear 3, a plurality of planetary gears 4 and a planet carrier 5, the planet carrier 5 is rotatably arranged at the center of the inner cavity 111, the sun gear 3 is rotatably arranged at the center of the planet carrier 5, At the center of the planetary frame 5, several planetary gears 4 are rotatably arranged on the periphery of the planetary frame 5, and the inner sides of several planetary gears 4 are meshed with the side wall of the sun gear 3 for transmission, one of the planetary gears 4 is an output planetary gear 41, the center of the output planetary gear 41 is a cylindrical hollow structure, a stirring rod 6 is provided at the bottom of the outer shell 1, the top of the stirring rod 6 extends to the center of the output planetary gear 41 for connection, an oil seal cover 7 is provided at the top of the output planetary gear 41, the bottom of the oil seal cover 7 is a snap-fit ​​opening 71, the oil seal cover 7 is fixedly connected to the top of the output planetary gear 41 through the snap-fit ​​opening 71, and the oil seal cover 7 covers the top of the stirring rod 6.

[0026] The specific structure between the output planetary gear 41, the planetary gear 4 and the planetary carrier 5 is as follows: Figure 2-4 As shown, an output through hole 53 is provided on the periphery of the planet carrier 5, and a protruding plug-in cam 42 is provided at the bottom end of the output planetary gear 41. The output planetary gear 41 is rotatably connected to the output through hole 53 via the plug-in cam 42. A plurality of planetary mounting shafts 51 are provided on the periphery of the planet carrier 5, and the center of the planetary gear 4 is rotatably sleeved inside the planetary mounting shaft 51.

[0027] The specific structure between the planet carrier 5 and the sun gear 3 is as follows: Figure 2 and 3 As shown, the top of the sun gear 3 is the first gear part 31, and the bottom of the sun gear 3 is the second gear part 32. The inner sides of several planetary gears 4 and the output planetary gears 41 are meshed with the second gear part 32 for transmission. A connecting through hole 113 is provided on one side of the bottom shell 11. The connecting through hole 113 is located at the same horizontal height as the first gear part 31. A vertically upward central mounting shaft 52 is provided at the center of the planet carrier 5. A plug-in through hole 33 is provided in the middle of the sun gear 3. The plug-in through hole 33 passes through the first gear part 31 and the second gear part 32. The sun gear 3 is rotatably plugged into the central mounting shaft 52 through the plug-in through hole 33.

[0028] In a further embodiment, Figure 3 and Figure 5As shown, the second gear portion 32 is a bevel gear structure, and a ring gear groove 112 is provided on the side wall of the inner cavity 111. The ring gear groove 112 is distributed in an annular structure with the planet carrier 5 as the center, and the outer sides of several planetary wheels 4 are meshed with the ring gear groove 112 for transmission. The first gear portion 31 is a helical gear, and the axial directions of the planetary mounting shaft 51 and the output through hole 53 are both tilted outward, and the cross-sectional structure of the ring gear groove 112 is an inverted frustum-shaped structure; a ring gear groove 112 matching the planetary wheel 4 is provided inside the housing 1, and the ring gear groove 112 is provided in an annular structure with the planet carrier 5 as the center, so that the outer side of the planetary wheel 4 is meshed with the ring gear groove 112 for transmission, reducing the investment in the ring gear in the traditional planetary reduction mechanism. At the same time, the ring gear groove 112 can play the function and effect of the ring gear, optimize the internal structure of the planetary reduction mechanism, and make the overall structure of the planetary reducer more compact and compact while ensuring the functionality remains unchanged.

[0029] The working principle of a planetary reduction mechanism with a liquid-leakage-proof structure is as follows: when the stirring shaft in a food mixer is disassembled, the oil seal cover 7 arranged at the top of the output planetary wheel 41 can cover the stirring shaft and the output through hole 53 for connecting the stirring shaft, so that the interior of the housing 1 and the output through hole 53 form an isolated structure. After the stirring shaft is removed, the lubricating oil inside the housing 1 cannot flow into the output through hole 53 through the obstruction of the oil seal cover 7, which can effectively prevent the lubricating oil used to lubricate the transmission component from flowing into the food container of the food mixer, thereby avoiding the lubricating oil from contaminating the food container.

[0030] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A planetary reduction mechanism with a liquid-leakage-proof structure, comprising a housing and an internal transmission assembly, wherein the interior of the housing is an inner cavity, the transmission assembly is arranged in the inner cavity, the transmission assembly comprises a sun gear, a plurality of planetary gears and a planet carrier, the planet carrier is rotatably arranged at the center of the inner cavity, the sun gear is rotatably arranged at the center of the planet carrier, the plurality of planetary gears are rotatably arranged at the periphery of the planet carrier, and the inner sides of the plurality of planetary gears are meshed with the side wall of the sun gear for transmission, characterized in that: One of the planetary wheels is an output planetary wheel, the center of the output planetary wheel is a cylindrical hollow structure, a stirring rod is provided at the bottom of the outer shell, the top of the stirring rod extends to the center of the output planetary wheel for connection, an oil seal cover is provided at the top of the output planetary wheel, the bottom of the oil seal cover is a snap-fit ​​opening, the oil seal cover is fixedly connected to the top of the output planetary wheel through the snap-fit ​​opening, and the oil seal cover covers the top of the stirring rod.

2. The planetary reduction mechanism with a liquid-leakage-proof structure according to claim 1, characterized in that: An output through hole is provided on the periphery of the planet carrier, and a protruding plug-in convex shaft is provided at the bottom end of the output planetary gear, and the output planetary gear is rotatably connected to the output through hole via the plug-in convex shaft.

3. The planetary reduction mechanism with a liquid-leakage-proof structure according to claim 2, characterized in that: The periphery of the planet carrier is provided with a plurality of planetary mounting shafts, and the centers of the planetary wheels are rotatably sleeved inside the planetary mounting shafts.

4. The planetary reduction mechanism with a liquid-leakage-proof structure according to claim 3, characterized in that: The top of the sun gear is the first gear part, the bottom of the sun gear is the second gear part, the inner sides of several planetary gears and the output planetary gears are meshed with the second gear part for transmission, and a connecting through hole is opened on one side of the bottom shell, and the connecting through hole is opened at the same horizontal height as the first gear part.

5. The planetary reduction mechanism with a liquid-leakage-proof structure according to claim 4, characterized in that: A vertically upward central mounting shaft is provided at the center of the planet carrier, a plug-in through hole is provided in the middle of the sun gear, the plug-in through hole runs through the first gear part and the second gear part, and the sun gear is rotatably plugged with the central mounting shaft through the plug-in through hole.

6. The planetary reduction mechanism with a liquid-leakage-proof structure according to claim 5, characterized in that: The side wall of the inner cavity is provided with a gear ring groove, which is distributed in an annular structure with the planet carrier as the center, and the outer sides of several planetary wheels are meshed with the gear ring groove for transmission.

7. The planetary reduction mechanism with a liquid-leakage-proof structure according to claim 6, characterized in that: The second gear portion is a bevel gear structure, the axial directions of the planetary mounting shaft and the output through hole are both tilted outward, and the cross-sectional structure of the gear ring groove is an inverted frustum-shaped structure.

8. The planetary reduction mechanism with a liquid-leakage-proof structure according to claim 4, characterized in that: The first gear portion is a helical gear.

9. A planetary reduction mechanism with a liquid-leakage-proof structure according to any one of claims 1 to 8, characterized in that: The shell is composed of a bottom shell and a top cover, the gear ring groove is opened on the inner wall of the bottom shell, the transmission assembly is rotatably arranged inside the bottom shell, and when the top cover is fixedly connected, the top cover can cover the top of the transmission assembly.

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