Planetary gear assembly easy to maintain and repair

Abstract

The utility model provides a planetary gear assembly easy to maintain and repair, and belongs to the technical field of gears. A plurality of maintenance and access holes are formed in the barrel bottom of the inner fluted disc, so that a bearing between a planetary gear and a planetary carrier can be directly operated through the maintenance and access holes under the condition that the bearing is not detached from the inner fluted disc, and meanwhile, a cover plate with an avoiding hole is detachably mounted on the outer side of the inner fluted disc, so that the bearing is prevented from being damaged. The receding holes are in one-to-one correspondence with the maintenance and access holes in the inner fluted disc, the gland with one end sealing the maintenance and access holes is detachably installed at the position, located at each receding hole, of the cover plate, when all or more bearings need to be maintained and replaced, all the maintenance and access holes can be opened by directly disassembling and assembling the cover plate, the disassembling and assembling amount is reduced, operation is convenient, and efficiency is higher; when one or a small number of bearings need to be independently maintained, overhauled and replaced, only one or a small number of glands need to be dismounted, overall dismounting and mounting are not needed, the dismounting and mounting amount is also reduced, operation is convenient, and efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear technology field, concretely relates to an easy maintenance and repair planetary gear assembly. BACKGROUND

[0002] The cooperation of the inner tooth disc and the planetary gear as a kind of mechanical transmission structure, the planetary gear is usually arranged in the inner tooth disc and rotates relative to the inner tooth disc, realizes the transmission of mechanical energy, and is widely used.

[0003] At present, the existing planetary gear assembly on the market is usually used as a planetary reducer, such as the inner tooth gear mechanism and planetary gear reducer disclosed in patent CN100429426C, which includes one or more than two levels of planetary gears, and a gear ring (equivalent to the above-mentioned inner tooth disc) with inner teeth meshing with the planetary gears of the planetary gear mechanism composed of one level or the last level planetary gear of the planetary gear mechanism composed of multiple levels is formed on the inner periphery. At this time, the planetary gear is rotatably installed in the gear ring and rotates relative to each other. As can be seen, the existing planetary gear rotates relative to the inner tooth disc, in addition, in order to realize the stability of the rotation of the planetary gear, a plurality of planetary gears are connected by a planet carrier to form a whole structure. In addition, in order to reduce wear and prolong the service life of the equipment, bearings are usually arranged between the rotating shaft of the planetary gear and the planet carrier. Although the above structure can better prolong the service life, with the increase of use time, the reduction of lubricating grease used for lubrication of the bearing and the entry of other debris and impurities will accelerate the wear of the bearing, affect the service life of the bearing, and cause the lubricating grease to be reduced, dry and other problems after running for a period of time. Debris and other impurities will enter the gap, so that the industry usually adds lubricating grease and cleans and maintains after disassembling the bearing and other structures after the above structure runs for a period of time, but the one-end-closed inner tooth disc cannot disassemble the bearing from the closed side, and when the bearing needs to be maintained and repaired in the future, the planetary gear needs to be disassembled from the inner tooth disc as a whole. For the structure with multiple planetary gears installed, the disassembly and assembly are difficult, the convenience is poor, and it is time-consuming and laborious. SUMMARY

[0004] In view of the above problems existing in the prior art, the present application aims to provide a planetary gear assembly easy to maintain and repair, which comprises an inner tooth disc, a planet wheel, a planet carrier and a bearing, wherein the inner tooth disc is arranged in a barrel shape, a ring of inner teeth is arranged on the inner wall of the barrel of the inner tooth disc, the planet carrier is arranged in the inner cavity of the inner tooth disc, a plurality of planet wheels are mounted on the planet carrier and engaged with the inner teeth of the inner tooth disc, and a bearing is arranged between the rotating shaft of each planet wheel and the planet carrier.

[0005] The specific technical solutions are as follows:

[0006] The planetary gear assembly easy to maintain and repair comprises an inner tooth disc, a planet wheel, a planet carrier and a bearing, wherein the inner tooth disc is arranged in a barrel shape, a ring of inner teeth is arranged on the inner wall of the barrel of the inner tooth disc, the planet carrier is arranged in the inner cavity of the inner tooth disc, a plurality of planet wheels are mounted on the planet carrier and engaged with the inner teeth of the inner tooth disc, and a bearing is arranged between the rotating shaft of each planet wheel and the planet carrier.

[0007] The planetary gear assembly easy to maintain and repair comprises an inner tooth disc, a planet wheel, a planet carrier and a bearing, wherein the inner tooth disc is arranged in a barrel shape, a ring of inner teeth is arranged on the inner wall of the barrel of the inner tooth disc, the planet carrier is arranged in the inner cavity of the inner tooth disc, a plurality of planet wheels are mounted on the planet carrier and engaged with the inner teeth of the inner tooth disc, and a bearing is arranged between the rotating shaft of each planet wheel and the planet carrier.

[0008] The planetary gear assembly easy to maintain and repair comprises an inner tooth disc, a planet wheel, a planet carrier and a bearing, wherein the inner tooth disc is arranged in a barrel shape, a ring of inner teeth is arranged on the inner wall of the barrel of the inner tooth disc, the planet carrier is arranged in the inner cavity of the inner tooth disc, a plurality of planet wheels are mounted on the planet carrier and engaged with the inner teeth of the inner tooth disc, and a bearing is arranged between the rotating shaft of each planet wheel and the planet carrier.

[0009] The planetary gear assembly easy to maintain and repair comprises an inner tooth disc, a planet wheel, a planet carrier and a bearing, wherein the inner tooth disc is arranged in a barrel shape, a ring of inner teeth is arranged on the inner wall of the barrel of the inner tooth disc, the planet carrier is arranged in the inner cavity of the inner tooth disc, a plurality of planet wheels are mounted on the planet carrier and engaged with the inner teeth of the inner tooth disc, and a bearing is arranged between the rotating shaft of each planet wheel and the planet carrier.

[0010] The easily maintained planetary gear assembly, wherein the outer side of the positioning sleeve away from the one end of the connecting block is arranged along an inwardly inclined surface.

[0011] The easily maintained planetary gear assembly, wherein each pressing cover further comprises a positioning column arranged on the side of the connecting block provided with the pressing sleeve, and a positioning hole corresponding to the positioning column is arranged on the cover plate and beside each avoiding hole.

[0012] The easily maintained planetary gear assembly, wherein the cover plate is in a ring-shaped sheet structure, a first assembly hole is arranged between two adjacent avoiding holes on the cover plate, and a plurality of first connecting holes corresponding to the first assembly holes are arranged on the bottom of the inner tooth disc.

[0013] The easily maintained planetary gear assembly, wherein the connecting block is in a cylindrical shape, a plurality of second assembly holes are arranged along the axial direction of the connecting block, the plurality of second assembly holes are arranged in a ring array on the connecting block, and a plurality of second connecting holes corresponding to the second assembly holes are arranged on the cover plate.

[0014] The positive effect of the above technical solution is:

[0015] The easily maintained planetary gear assembly, wherein a plurality of through holes with the same diameter are arranged on the bottom of the inner tooth disc, each through hole is a maintenance hole, a cover plate is detachably arranged on the bottom of the inner tooth disc and away from the planetary gear, a plurality of avoiding holes corresponding to the maintenance holes are arranged on the cover plate, a pressing cover is detachably arranged on the cover plate and at each avoiding hole, one end of the pressing cover extends into the corresponding maintenance hole and seals the corresponding maintenance hole, the outer side is protected during normal use, when maintenance is needed, all the maintenance holes can be opened at the same time by detaching the cover plate, without the need for one-by-one operation, the operation is more convenient and efficient, in addition, when a single damaged bearing needs to be replaced, only one pressing cover needs to be detached, without the need for detaching other structures, the amount of disassembly is reduced, the operation is also facilitated, and the maintenance is more convenient and time-saving and labor-saving. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural view of an embodiment of the easily maintained planetary gear assembly of the utility model;

[0017] Figure 2 It is a sectional view of an embodiment of the easily maintained planetary gear assembly of the utility model.

[0018] In the drawing: 1, inner toothed disc; 11, maintenance access hole; 12, first connecting hole; 2, cover plate; 21, avoiding hole; 22, positioning hole; 23, first assembly hole; 24, second connecting hole; 3, gland; 31, connecting block; 32, compression sleeve; 33, positioning sleeve; 34, positioning column; 311, second assembly hole. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the following examples are combined with the accompanying drawings to illustrate the utility model. Figure 1 to the accompanying drawings Figure 2 The technical solutions of the utility model are described in detail, but the following content is not a limitation of the utility model.

[0020] Figure 1 The structure diagram of an embodiment of the utility model of an easy-to-maintain planetary gear assembly; Figure 2 The sectional view of an embodiment of the utility model of an easy-to-maintain planetary gear assembly. As shown in the drawing, Figure 1 and Figure 2 The easy-to-maintain planetary gear assembly provided by the embodiment includes an inner toothed disc 1, a planetary gear, a planet carrier, a bearing, a cover plate 2 and a gland 3. At this time, the inner toothed disc 1 is arranged in a barrel shape, a ring of inner teeth is arranged on the inner barrel wall of the inner toothed disc 1, the planet carrier is arranged in the inner cavity of the inner toothed disc, a plurality of planetary gears are installed on the planet carrier and are in mesh with the inner teeth of the inner toothed disc 1, and a bearing is arranged between the rotating shaft of each planetary gear and the planet carrier. When the planetary gear is installed in the inner toothed disc 1 later, the planetary gear can mesh with the inner teeth on the inner toothed disc 1 to realize transmission.

[0021] Specifically, a plurality of maintenance access holes 11 are arranged in an annular array on the barrel bottom of the inner tooth disc 1, which provides convenience for subsequent maintenance, repair and replacement of bearings between the planetary gears and the planet carrier. At this time, each maintenance access hole 11 is a through hole that is equal in diameter and penetrates the barrel bottom of the inner tooth disc 1, i.e., each maintenance access hole 11 is a cylindrical through hole, so that the bearings can be smoothly taken out or installed from the maintenance access hole 11, i.e., without removing the assembly composed of the planetary gears and the planet carrier from the inner tooth disc, the assembly can be rotated to make the bearings at the connection between the shaft of the planetary gear and the planet carrier correspond to the maintenance access hole 11, so that the bearings can be directly maintained, repaired and replaced from the maintenance access hole 11, reducing the amount of disassembly and thus improving the disassembly flexibility and facilitating operation. In addition, the cover plate 2 is attached to the outer side of the barrel bottom of the inner tooth disc 1, so that the cover plate 2 and the planetary gears are located on the two sides of the barrel bottom of the inner tooth disc 1, respectively. Moreover, the cover plate 2 is detachably connected with the inner tooth disc 1, which provides convenience for subsequent maintenance and replacement of all bearings in the maintenance access holes 11 after the cover plate 2 is removed. At this time, a plurality of avoidance holes 21 corresponding to the maintenance access holes 11 are formed in the cover plate 2 to avoid the cover plate 2 covering the maintenance access holes 11, and the outer side space of the maintenance access holes is expanded through the avoidance holes 21, which facilitates maintenance, repair and replacement and also provides conditions for subsequent replacement of damaged bearings. Meanwhile, a pressing cover 3 is arranged at the side of the cover plate 2 away from the inner tooth disc 1 and located at each avoidance hole 21, and the pressing cover 3 is detachably connected with the cover plate 2, i.e., the pressing cover 3 can cover the avoidance hole 21 and is movably connected with the cover plate 2, so that the structure is more flexible. In addition, when the pressing cover 3 is installed on the inner tooth disc 1, one end of each pressing cover 3 is opposite to and extends into and seals the corresponding maintenance access hole 11, so as to maintain the structural integrity of the inner tooth disc under normal circumstances and meet the outer protection requirements. During subsequent use, if it is necessary to maintain, repair, replace or the like of all bearings or a plurality of bearings, all maintenance access holes 11 can be opened by removing the cover plate 2, and at this time, the assembly composed of the planetary gears and the planet carrier is rotated to correspond to each planetary gear to a maintenance access hole 11, without the need to separately remove each corresponding structure, so that the operation steps are fewer and the operation is more convenient. When it is necessary to maintain, repair and replace a single or two or the like smaller number of damaged bearings, only the pressing cover 3 at the corresponding maintenance access hole 11 needs to be removed, which avoids a large amount of disassembly and also reduces the operation steps and improves the operation convenience, saving time and effort.

[0022] More specifically, threaded fasteners are arranged between the cover plate 2 and the barrel bottom of the inner tooth disc 1, and similarly, threaded fasteners are arranged between the pressure cover 3 and the cover plate 2, so that the cover plate 2 and the barrel bottom of the inner tooth disc 1 are connected by threaded fasteners, and the pressure cover 3 and the cover plate 2 are connected by threaded fasteners. Preferably, the threaded fasteners are screws, which facilitate the disassembly and assembly of the cover plate 2 from the inner tooth disc 1, and also facilitate the disassembly and assembly of the pressure cover 3 from the cover plate 2.

[0023] More specifically, the pressure cover 3 for mounting on the cover plate 2 and pressing the bearing further comprises a connecting block 31 and a pressing sleeve 32. During installation, the pressing sleeve 32 is arranged vertically on one side of the connecting block 31. Preferably, the connecting block 31 and the pressing sleeve 32 are of an integrated structure, which has better integrity and higher structural strength. At this time, the connecting block 31 is mounted on the cover plate 2, meeting the use requirements of disassembly and assembly of the pressure cover 3 and the cover plate 2. At the same time, the end of the pressing sleeve 32 away from the connecting block 31 extends from the avoiding hole 21 into the maintenance access hole 11 and seals the maintenance access hole 11, maintaining the structural integrity of the inner tooth disc 1 during normal use, ensuring that it can provide better external protection, and the structural design is more reasonable.

[0024] More specifically, each pressure cover 3 further comprises a positioning sleeve 33. At this time, the hole diameter of the avoiding hole 21 on the cover plate 2 is greater than the hole diameter of the maintenance access hole 11 on the inner tooth disc 1. The avoiding hole 21 expands the external space of the maintenance access hole 11, facilitating the maintenance, repair and replacement of the bearing in the inner tooth disc 1 from the outside of the maintenance access hole 11. At the same time, the positioning sleeve 33 is sleeved outside the pressing sleeve 32, forming a stepped structure outside the pressing sleeve 32 through the positioning sleeve 33, and the length of the positioning sleeve 33 is set to be less than or equal to the thickness of the cover plate 2, so that the positioning sleeve 33 is located in the avoiding hole 21 when the pressure cover 3 is subsequently mounted on the cover plate 2, that is, the positioning sleeve 33 fills the excessive gap on the cover plate 2 caused by the avoiding hole 21, further improving the stability of the pressure cover 3 after being mounted on the cover plate 2, and facilitating the rapid positioning of the pressing sleeve 32 when being inserted into the maintenance access hole 11 through the cooperation of the positioning sleeve 33 and the avoiding hole 21, making disassembly and assembly more convenient. Preferably, the positioning sleeve 33, the pressing sleeve 32 and the connecting block 31 are of an integrated structure, which has better integrity, higher structural strength and facilitates processing and manufacturing.

[0025] More specifically, the outside of the end of the positioning sleeve 33 away from the connecting block 31 is arranged along an inwardly converging slope, so that when the positioning sleeve 33 cooperates with the avoiding hole 21, the slope on the outside of the positioning sleeve 33 can be in contact with the hole opening of the avoiding hole 21 to realize rapid guiding and centering, facilitating the rapid insertion of the positioning sleeve 33 into the avoiding hole 21, and thus facilitating the rapid insertion of the pressing sleeve 32 into the corresponding maintenance access hole 11 to seal the maintenance access hole 11, and the structural design is more reasonable.

[0026] More specifically, each of the grommet 3 comprises a positioning column 34 in addition to the connecting block 31, the compression sleeve 32 and the positioning sleeve 33, at this time, the positioning column 34 is arranged on the side of the connecting block 31 provided with the compression sleeve 32, and the positioning column 34 is arranged parallel to the compression sleeve 32, so that the positioning column 34 can adapt to the installation direction of the grommet 3. And a positioning hole 22 corresponding to the positioning column 34 is arranged on the cover plate 2 beside each of the escape holes 21, so that when the grommet 3 is installed on the cover plate 2 by the threaded fastener, the positioning column 34 can be inserted into the positioning hole 22 to realize quick positioning, thereby ensuring that the hole for installing the threaded fastener can be quickly aligned, improving the disassembly and assembly efficiency and being more convenient to operate.

[0027] More specifically, the cover plate 2 is arranged in a ring-shaped sheet structure, which can better adapt to the barrel bottom of the inner gear plate 1, and at the same time, space is reserved in the center of the barrel bottom of the inner gear plate 1 for installing the shaft body and other structures. In addition, a first assembly hole 23 is also arranged on the cover plate 2 between adjacent two escape holes 21, and a plurality of first connecting holes 12 corresponding to the first assembly hole 23 are arranged on the barrel bottom of the inner gear plate 1, that is, after the first assembly hole 23 and the first connecting hole 12 are corresponded, the cover plate 2 can be installed on the inner gear plate 1 by connecting the first assembly hole 23 and the first connecting hole 12 through the threaded fastener, and vice versa.

[0028] More specifically, the connecting block 31 is arranged in a cylindrical shape, at this time, a plurality of second assembly holes 311 are arranged on the connecting block 31 along the axial direction, and the plurality of second assembly holes 311 are arranged in a ring array on the connecting block 31, thereby realizing the uniform distribution of the plurality of second assembly holes 311 on the connecting block 31 and ensuring that the grommet 3 can bear force uniformly after installation, thereby better sealing the maintenance hole 11. In addition, a plurality of second connecting holes 24 corresponding to the second assembly holes 311 are arranged on the cover plate 2, so that after the second assembly hole 311 and the second connecting hole 24 are aligned, the grommet 3 can be installed on the cover plate 2 by connecting the second assembly hole 311 and the second connecting hole 24 through the threaded fastener, and vice versa.

[0029] The planetary gear assembly easy to maintain and repair provided by the embodiment comprises an inner tooth disc 1, planetary gears, a planet carrier, bearings, a cover plate 2 and a gland 3; a plurality of maintenance and repair holes 11 are arranged on the barrel bottom of the inner tooth disc 1, and the maintenance and repair holes 11 are equal-diameter through holes, so that the bearings between the planetary gears and the planet carrier can be directly operated through the maintenance and repair holes 11 without being disassembled from the inner tooth disc 1, thereby achieving maintenance, repair and replacement of the bearings in the inner tooth disc 1 from the outside of the inner tooth disc 1, meanwhile, the cover plate 2 with avoiding holes 21 is disassembled and installed on the outside of the inner tooth disc 1, the avoiding holes 21 correspond to the maintenance and repair holes 11 on the inner tooth disc 1 one by one, and a cover plate 2 is disassembled and installed at each avoiding hole 21, one end of the cover plate 2 extends into the maintenance and repair hole 11 and seals the maintenance and repair hole 11, so that when all or a large number of bearings need to be maintained and replaced, all the maintenance and repair holes 11 can be opened by directly disassembling the cover plate 2, without the need to disassemble each component from the planetary gear and planet carrier assembly one by one to operate, thereby reducing the disassembly amount, facilitating operation, being more efficient, and when one or a small number of bearings need to be individually maintained, repaired and replaced, only one or a small number of glands 3 need to be disassembled, without the need for overall disassembly, thereby also reducing the disassembly amount, facilitating operation, improving efficiency, saving time and effort.

[0030] The above is only the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model, and those skilled in the art should realize that any equivalent replacement and obvious change obtained by applying the contents of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. A planetary gear assembly that is easy to maintain and repair, comprising an internal gear disk, planet gears, a planet carrier, and bearings, wherein the internal gear disk is arranged in a barrel shape, and a ring of internal teeth is provided on the inner wall of the internal gear disk; the planet carrier is disposed in the inner cavity of the internal gear disk, and a plurality of planet gears are mounted on the planet carrier and all of them mesh with the internal teeth of the internal gear disk; a bearing is provided between the shaft of each planet gear and the planet carrier, characterized in that... The cover plate is arranged outside the barrel bottom of the inner tooth disc and detachably connected with the inner tooth disc, a plurality of avoiding holes corresponding to the maintenance and repair holes are arranged on the cover plate, and one pressing cover is arranged at the side of the cover plate away from the inner tooth disc and located at each avoiding hole.

2. The low maintenance planetary gear assembly of claim 1, wherein, The cover plate and the barrel bottom of the inner tooth disc are connected by threaded fasteners, and the pressing cover and the cover plate are connected by threaded fasteners.

3. The low maintenance planetary gear assembly of claim 1, wherein, The pressing cover comprises a connecting block and a pressing sleeve, the pressing sleeve is vertically arranged on one side of the connecting block, the connecting block is mounted on the cover plate, and one end of the pressing sleeve away from the connecting block extends into the maintenance and repair hole from the avoiding hole and abuts against the bearing.

4. The low maintenance planetary gear assembly of claim 3, wherein, Each pressing cover further comprises a positioning sleeve, the hole diameter of the avoiding hole is greater than that of the maintenance and repair hole, the positioning sleeve is arranged outside the pressing sleeve, the length of the positioning sleeve is less than or equal to the thickness of the cover plate, and when the pressing cover is mounted on the cover plate, the positioning sleeve is located in the avoiding hole.

5. The low maintenance planetary gear assembly of claim 4, wherein, The outer side of one end of the positioning sleeve away from the connecting block is arranged along an inwardly recessed inclined surface.

6. A low maintenance planetary gear assembly according to any one of claims 3-5, characterized in that, Each pressing cover further comprises a positioning column, the positioning column is arranged on one side of the connecting block provided with the pressing sleeve, and a positioning hole corresponding to the positioning column is arranged on the cover plate and located beside each avoiding hole.

7. The low maintenance planetary gear assembly of claim 1, wherein, The cover plate is a ring-shaped sheet structure, a first assembly hole is arranged on the cover plate and located between adjacent two avoiding holes, and a plurality of first connecting holes corresponding to the first assembly holes are arranged on the barrel bottom of the inner tooth disc.

8. The low maintenance planetary gear assembly of claim 3, wherein, The connecting block is arranged in a cylindrical shape, a plurality of second assembly holes are arranged on the connecting block in the axial direction, the second assembly holes are arranged in a ring array on the connecting block, and a plurality of second connecting holes corresponding to the second assembly holes are arranged on the cover plate.

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