Dustproof built-in planetary gear

Abstract

The utility model provides a dustproof built-in planetary gear, and belongs to the technical field of gears. The dustproof built-in planetary gear comprises a planetary gear structure, a structure end cover, a structure base and a filter screen cover. Two sides of the planetary gear structure are respectively sleeved with a structural end cover and a structural base on the central shaft, so that the planetary gear structure is internally mounted; a positioning shaft sleeve is formed in the center of the structural end cover, structural frameworks are formed by radially extending outwards from the positioning shaft sleeve to the inner side wall of the cover edge of the structural end cover, heat dissipation holes are formed between the structural frameworks, and shaft holes and connecting columns are arranged on the structural frameworks at intervals. A filter screen mounting step is formed between the structural framework and the outer edge of the end surface of the structural end cover; a filter screen cover is connected and matched in a step sinking groove of the filter screen mounting step through a screw; the structure base and the structure end cover are oppositely arranged with the planetary gear structure as the center, and the structure is basically consistent with the structure end cover. The utility model has the advantages of effective dust prevention, capability of maintaining high-efficiency and high-precision operation, and prolonged service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear technical field, and particularly relates to a dustproof built-in planetary gear. BACKGROUND

[0002] The planetary gear is a gear system which can rotate around its own rotating shaft and its rotating shaft can also rotate around the shaft of other gears. The planetary gear has the characteristics of high transmission efficiency, high load capacity, compact structure, wide transmission ratio range, and is suitable for various application scenarios from small-scale precision instruments to large-scale industrial machines. However, due to the complex meshing structure and working state of the planetary gear, the transmission precision is required to be high. In actual application, the gear is easily contaminated by dust and sundries, which affects the normal operation of the planetary gear, and easily produces vibration and noise and wears the gear surface, reducing the service life.

[0003] The patent with the application number CN201410402406.2 discloses a planetary gear built-in integrated bearing dustproof precision cycloid reducer. The reducer is designed according to the cycloid principle. The gear shaft is installed on the left support frame and the right support frame through the bearing, so that the gear is located between the support frames, and a certain degree of dust blocking effect is achieved. However, the dustproof effect is still limited. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above problems existing in the prior art, and provides a dustproof built-in planetary gear.

[0005] The utility model discloses a dustproof built-in planetary gear, which comprises a planetary gear structure, a structure end cover, a structure base and a filter screen cover.

[0006] The two sides of the planetary gear structure are respectively provided with the structure end cover and the structure base on the central shaft. The central shaft hole is formed in the center of the structure end cover. The annular positioning shaft sleeve is formed on the end cover around the central shaft hole. The structure skeleton is evenly formed on the inner side wall of the cover rim of the structure end cover from the positioning shaft sleeve. The heat dissipation holes are formed between the adjacent structure skeletons on the structure end cover. The shaft holes for installing the planetary pinion shaft and the connecting columns connected with the structure base are respectively formed on one side of the structure skeleton facing the planetary gear structure.

[0007] The structural frame has a filter screen mounting step between the outer edge of the end face of the structural end cover and the filter screen mounting step. The filter screen cover is installed in the recessed groove of the step by screws. The filter screen cover has a bushing hole in the center that corresponds to the positioning bushing. The bushing hole is surrounded by planetary gear shaft holes that correspond to the positioning of the planetary pinion shaft.

[0008] The structural base and the structural end cover are arranged opposite each other with the planetary gear structure as the center. Their structures are basically the same as those of the structural end cover, including the positioning bushing, the structural frame and the filter screen mounting step. The filter screen cover is installed in the filter screen mounting step by screw connection.

[0009] In the aforementioned dustproof built-in planetary gear, the structural frame has a filter screw hole near the filter mounting step, and the filter cover has a screw mounting groove on its outer edge that corresponds to the filter screw hole on the structural frame. The filter cover is fixed to the structural end cover or structural base by passing the filter fixing screw through the screw mounting groove and extending into the filter screw hole.

[0010] In the aforementioned dustproof built-in planetary gear, the structural base extends from the positioning bushing on the side opposite to the structural end cover to form a spline bushing sleeve fitted on the central shaft. The connecting post on the structural base pointing towards the structural end cover is longer than the connecting post on the structural end cover and passes through the gap between the planetary pinion and the inner teeth of the outer gear ring.

[0011] In the aforementioned dustproof built-in planetary gear, the filter cover can be selected from different filter materials according to actual needs, including but not limited to polyester fiber, stainless steel wire, nylon, etc.

[0012] Compared with the prior art, the dustproof built-in planetary gear provided by this utility model integrates the planetary gear structure into the space formed by the combination of the structural end cover and the structural base, and installs a detachable filter cover on the heat dissipation holes at both ends, thereby achieving dustproof operation of the planetary gear structure, making it less susceptible to external environmental pollution, maintaining high-efficiency and high-precision operation, and improving service life. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of the structure of this dustproof built-in planetary gear;

[0014] Fig. 2 This is an exploded view of the structure of this dustproof built-in planetary gear;

[0015] In the above diagram, 100 is the planetary gear structure; 110 is the central shaft; 111 is the sun gear; 120 is the planetary pinion; 130 is the external gear ring; 200 is the structural end cover; 210 is the positioning bushing; 220 is the structural frame; 221 is the heat dissipation hole; 222 is the connecting column; 223 is the filter screw hole; 230 is the filter mounting step; 300 is the structural base; 310 is the spline sleeve; 400 is the filter cover; 401 is the bushing hole; 402 is the planetary gear shaft hole; 403 is the screw mounting slot; and 410 is the filter fixing screw. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figs. 1-2 As shown, this dustproof built-in planetary gear includes a planetary gear structure 100, a structural end cover 200, a structural base 300, and a filter cover 400. The planetary gear structure 100 consists of a central shaft 110, a sun gear 111 sleeved on the central shaft 110, a plurality of planetary pinions 120 meshing around the sun gear 111, and an outer gear ring 130 surrounding and meshing with the planetary pinions 120. The structural end cover 200 and the structural base 300 are respectively sleeved on the central shaft 110 on both sides of the planetary gear structure 100. The structural end cover 200 and the structural base 300 are arranged opposite each other with the planetary gear structure 100 as the center, and the filter cover 400 is installed on the opposite side by screws.

[0018] like Fig. 2 As shown, a central shaft 110 hole is provided in the center of the structural end cover 200. An annular positioning bushing 210 is formed on the end cover around the central shaft 110 hole. Several structural skeletons 220 are formed radially and evenly from the positioning bushing 210 to the inner sidewall of the edge of the structural end cover 200. The number of structural skeletons 220 in the circumferential direction is preferably six. A heat dissipation hole 221 is formed on the structural end cover 200 between adjacent structural skeletons 220. The heat dissipation hole 221 is used as a channel to communicate the airflow inside and outside, and to dissipate heat inside when the planetary gear structure 100 is running.

[0019] The structural frame 220 has a shaft hole for mounting the axle of the planetary pinion 120 and a protrusion forming a connecting post 222 that connects to the structural base 300 on the side facing the planetary gear structure 100. The axle of the planetary pinion 120 passes through the shaft hole on the structural frame 220 and protrudes from the surface of the structural frame 220. The shaft hole and the connecting post 222 are both triangularly positioned.

[0020] The structural frame 220 forms a filter screen mounting step 230 between its end face and the outer edge of the structural end cover 200. The structural frame 220 has filter screen screw holes 223 near the filter screen mounting step 230. A filter screen cover 400 is fitted into the recessed groove of the filter screen mounting step 230. The filter screen cover 400 has a screw mounting groove 403 on its outer edge corresponding to the filter screen screw holes 223 on the structural frame 220. Filter screen fixing screws 410 pass through the screw mounting grooves 403 and extend into the filter screen screw holes 223 to fix the filter screen cover 400 to the structural end cover 200. The filter screen cover 400 has a bushing hole 401 at its center that mates with the positioning bushing 210. Around the bushing hole 401 are planetary gear shaft holes 402 that position corresponding to the planetary pinion 120 shaft. The filter screen cover 400 can be made of different filter materials, including but not limited to polyester fiber, stainless steel wire, and nylon, depending on the actual requirements.

[0021] The structure of the base 300 is basically the same as that of the end cover 200, including the positioning bushing 210, the structural frame 220 and the filter screen mounting step 230. The filter screen cover 400 is installed in the filter screen mounting step 230 by screw connection. The difference is that the base 300 has a spline bushing sleeve on the central shaft 110 extending from the positioning bushing 210 on the side opposite to the end cover 200. The connecting post 222 on the base 300 pointing to the end cover 200 is longer than the connecting post 222 on the end cover 200 and passes through the gap between the planetary pinion 120 and the inner teeth of the outer gear ring 130.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A dustproof built-in planetary gear, comprising a planetary gear structure (100), a structure end cover (200), a structure base (300), and a filter cover (400); the planetary gear structure (100) comprises a central shaft (110), a sun gear (111) sleeved on the central shaft (110), a plurality of planetary pinions (120) meshing around the sun gear (111), and an outer gear ring (130) surrounding and meshing with the planetary pinions (120); Its features are, On both sides of the planetary gear structure (100), a structural end cap (200) and a structural base (300) are respectively fitted on the central shaft (110). The structural end cap (200) has a central shaft (110) hole in the center. A ring positioning bushing (210) is formed on the end cap around the central shaft (110) hole. Several structural skeletons (220) are formed evenly and radially extending from the positioning bushing (210) to the inner sidewall of the structural end cap (200). Heat dissipation holes (221) are formed on the structural end cap (200) between adjacent structural skeletons (220). On the side of the structural skeleton (220) facing the planetary gear structure (100), there are shaft holes for installing the planetary pinion (120) shaft and a protrusion forming a connecting column (222) connected to the structural base (300). The structural frame (220) has a filter screen mounting step (230) formed between the outer edge of the end face of the structural end cover (200). The filter screen cover (400) is installed in the recessed groove of the step (230) by screw connection. The filter screen cover (400) has a bushing hole (401) in the center that corresponds to the positioning bushing (210). The bushing hole (401) is surrounded by a planetary gear shaft hole (402) that corresponds to the planetary pinion (120) shaft. The structural base (300) and the structural end cover (200) are arranged opposite each other with the planetary gear structure (100) as the center. Their structures are basically the same as those of the structural end cover (200), including a positioning bushing (210), a structural frame (220), and a filter screen mounting step (230). The filter screen cover (400) is installed in the filter screen mounting step (230) by screw connection.

2. The dustproof built-in planetary gear according to claim 1, characterized in that, The structural frame (220) has a filter screw hole (223) near the filter mounting step (230). The filter cover (400) has a screw mounting groove (403) on its outer edge that corresponds to the filter screw hole (223) on the structural frame (220). The filter cover (400) is fixed to the structural end cover (200) or the structural base (300) by passing the filter fixing screw (410) through the screw mounting groove (403) and extending into the filter screw hole (223).

3. The dustproof built-in planetary gear according to claim 1, characterized in that, The structural base (300) extends from the positioning bushing (210) on the side opposite to the structural end cover (200) to form a spline bushing sleeve fitted on the central shaft (110). The connecting post (222) on the structural base (300) pointing to the structural end cover (200) is longer than the connecting post (222) on the structural end cover (200) and passes through the gap between the planetary pinion (120) and the inner teeth of the outer gear ring (130).

4. A dustproof built-in planetary gear according to claim 1, characterized in that, The filter cover (400) can be made of different filter materials according to actual needs, including but not limited to polyester fiber, stainless steel wire, nylon, etc.

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