Planet carrier with accommodating window

Abstract

The utility model discloses a planet carrier with accommodating windows, which comprises a planet carrier body, the planet carrier body is provided with a center shaft cavity penetrating along the axis of the planet carrier body, the periphery of the planet carrier body is provided with a plurality of accommodating windows, the accommodating windows are communicated with the center shaft cavity, the two side walls of each accommodating window are provided with bosses, and the bosses are arranged in the center shaft cavity. The opposite faces of the two corresponding bosses form two-end positioning planes allowing the planetary gear to be inserted therein respectively. According to the planet carrier with the containing window, the bosses are arranged on the two side walls of the containing window, the opposite faces of the two bosses serve as positioning planes to abut against bearings or gaskets on the planet gears to form assembly positioning, and therefore only the bosses need to be subjected to finish machining, and the planet carrier with the containing window can be obtained. Therefore, the assembling precision of the planet carrier and the planet gear on the planet carrier can be matched, the area needing finish machining is reduced, machining efficiency is improved, and manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of planetary carriers, and in particular to a planetary carrier with an accommodating window. Background Art

[0002] Planetary gear transmission refers to a gear transmission in which the axis of one or more gears rotates around the fixed axis of another gear. The planetary gear rotates around its own axis and also rotates around the fixed axis with the planet carrier. The planet carrier is one of the main components of the planetary gear transmission device, and the planetary gear shaft or bearing is mounted on the planet carrier. A window is opened on the traditional planetary carrier casting, and the window is used to install the planetary gear and its matching bearing. For example, Chinese patent 202223549637.5 discloses a planetary carrier assembly, in which the front side wall and the rear side wall of the planetary carrier body are spaced apart to form a accommodating space, which extends in the front and rear directions, and the sun gear, planetary shaft and planetary gear are placed in the accommodating space. Among them, the accommodating space is the window for installing the planetary gear. During processing, in order to meet the precision requirements, each surface of the window is generally fine-machined to match the installation of the planetary gear.

[0003] For the above-mentioned prior art, in the assembly of the planet carrier and the planetary gear thereon, the part where the window contacts the bearing or washer matching the planetary gear has a precision requirement, but now since the contact surface and the inner wall of the window are in the same plane, it is often necessary to fine-process each surface in the window, which greatly wastes manpower, material resources and time. Therefore, how to efficiently fine-process the planet carrier to match the assembly of the planet carrier and the planetary gear thereon is a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies, propose a planet carrier with an accommodating window, and solve the technical problem in the prior art of how to efficiently perform fine processing on the planet carrier to match the assembly of the planet carrier and the planetary gears thereon.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a planet carrier with an accommodating window, comprising:

[0007] A planetary carrier body, wherein a central axis cavity is provided on the planetary carrier body and passes through the central axis cavity along its axis. A plurality of accommodating windows are provided on the outer circumference of the planetary carrier body, wherein the accommodating windows are communicated with the central axis cavity. Both side walls of the accommodating windows are provided with bosses, and opposite sides of two corresponding bosses respectively form two end positioning planes for inserting planetary gears.

[0008] In some embodiments, a planetary gear assembly is further included, and the planetary gear assemblies are inserted into the accommodating windows one by one and abut against the two bosses in the accommodating windows.

[0009] In some embodiments, the boss is in the shape of a circular step.

[0010] In some embodiments, the planetary gear assembly includes a planetary gear body, a bearing assembly and a planetary shaft body, the planetary shaft body is inserted into the planetary carrier body, the bearing assembly is sleeved on the outside of the planetary shaft body, the planetary gear body is sleeved on the outside of the bearing assembly, and the upper end face and the lower end face of the bearing assembly are respectively abutted against the bosses on the two side walls of the accommodating window.

[0011] In some embodiments, a plurality of planetary shaft holes are opened at one end of the planetary carrier body corresponding to the accommodating window one by one, the planetary shaft holes pass through the accommodating window and the corresponding two bosses, and the planetary shaft body is inserted into the planetary shaft hole.

[0012] In some embodiments, the shape of the planet shaft hole matches the shape of the planet shaft body, so that the planet shaft body is embedded in the planet shaft hole.

[0013] In some embodiments, the bearing assembly includes a bearing, an outer spacer, an inner spacer and a retaining ring. A pair of the outer spacers abut against both sides of the retaining ring, a pair of the bearings abut against the opposite sides of the two outer spacers, and both ends of the inner spacer are inserted between the inner sides of the two inner spacers, and the two ends abut against the two bearings respectively.

[0014] In some embodiments, the ends of the two bearings that are away from each other are respectively in contact with the corresponding two bosses.

[0015] In some embodiments, the planetary shaft body is a two-section stepped shaft, and the shaft diameter increases from left to right and forms a step, and the step abuts against the bearing on the corresponding side.

[0016] In some embodiments, the length of the bearing assembly is greater than the thickness of the planetary gear body.

[0017] Compared with the prior art, the planetary carrier with a accommodating window provided by the utility model has bosses on both side walls of the accommodating window, and uses the opposite sides of the two bosses as positioning planes to abut against the bearings or washers on the planetary gears to form an assembly positioning, so that only the bosses need to be fine-processed to match the assembly accuracy of the planetary carrier and the planetary gears thereon, reducing the area that needs to be fine-processed, thereby improving processing efficiency and reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of a planet carrier with an accommodating window provided in an embodiment of the utility model;

[0019] Figure 2 It is a three-dimensional exploded view of a planet carrier with an accommodating window provided by an embodiment of the utility model;

[0020] Figure 3 It is a three-dimensional diagram of the structure of the planetary gear assembly provided by the embodiment of the utility model;

[0021] Figure 4 It is a three-dimensional structural diagram of the planetary carrier provided in the embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1. Planet carrier; 101. Central shaft cavity; 102. Accommodating window; 103. Boss; 104. Planet shaft hole;

[0024] 2. Planetary gear assembly; 21. Planetary gear body; 22. Bearing assembly; 23. Planetary shaft body; 221. Bearing; 222. Outer spacer; 223. Inner spacer; 224. Clamp; 2301. Step; DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] In order to solve the technical problem of how to efficiently perform fine processing on the planet carrier to match the assembly of the planet carrier and the planetary gears thereon, the utility model provides a planet carrier with an accommodating window, which can achieve efficient fine processing of the planet carrier to match the assembly of the planet carrier and the planetary gears thereon.

[0027] It should be noted that the planetary carrier with an accommodating window described in the present invention is used for but not limited to a planetary carrier of a reducer. For the sake of convenience of explanation, in the present invention, only the planetary carrier with an accommodating window is used in a planetary carrier of a reducer as an example for explanation. The principle of using the planetary carrier with an accommodating window in other types of planetary carriers is essentially the same as the principle of using it in the planetary carrier of a reducer, and will not be described in detail here.

[0028] See also Figure 1 and Figure 2 , Figure 1 This is a three-dimensional diagram of the structure of a planet carrier with an accommodating window in one embodiment of the utility model. Figure 2The 3D exploded view of the planet carrier with the receiving window in this embodiment, wherein the planet carrier with the receiving window comprises a planet carrier body 1, and the planet carrier body 1 is provided with a central axis cavity 101 penetrating along its axis, which is used to penetrate the sun gear shaft and insert the sun gear. The outer circumference of the planet carrier body 1 is provided with a plurality of receiving windows 102, which are evenly distributed in a circle, and the receiving windows 102 are connected with the central axis cavity 101, and the receiving windows 102 are used to insert the planetary gears, so that the planetary gears are installed on the planet carrier body 1 and mesh with the sun gear in the central axis cavity 101. Both side walls of the accommodating window 102 are provided with bosses 103, and the opposite sides of the two corresponding bosses 103 respectively form two end positioning planes for the planetary gears to be inserted. By leaving bosses 103 on the side walls of the two end surfaces of the accommodating window 102 corresponding to the installation of the planetary gears when casting the planetary carrier 1, it is only necessary to fine-process the bosses 103, and the remaining surfaces in the accommodating window 102 do not need to be processed again, which reduces the area requiring fine processing, improves the fine processing efficiency, and saves manufacturing costs. Then, according to the two end positioning planes for the insertion of the planetary gears formed on the opposite sides of the bosses 103 after fine processing, the bearings or washers on the planetary gears can be abutted against the positioning planes.

[0029] In this embodiment, when casting the planetary carrier body 1, a plurality of circumferentially distributed receiving windows 102 are provided thereon, and bosses 103 corresponding to the installation of the planetary gears are retained in the receiving windows 102. The bosses 103 are used to abut against the bearings or washers at both ends of the planetary gears. Therefore, it is only necessary to fine-process the surface of the bosses 103 to achieve the assembly accuracy requirements for matching the planetary carrier and the planetary gears thereon, thereby reducing the area that needs to be fine-processed and improving the finishing efficiency.

[0030] It can be understood that the number of the accommodating windows 102 is preferably four, corresponding to the installation of four planetary gears.

[0031] In one embodiment, see Figure 1-4 , and also includes a planetary gear assembly 2, which is inserted into the accommodating window 102 one by one and abuts against the two bosses 103 in the accommodating window 102. Through the abutment of the bosses 103, the planetary gear assembly 2 can be built into the accommodating window 102 without contacting the inner wall of the accommodating window 102, thereby achieving the effect of distinguishing the contact surface from the inner wall of the accommodating window 102.

[0032] In this embodiment, by providing a raised boss 103 in the accommodating window 102, the contact surface requiring precision is accurately extracted, and the area requiring fine processing can be reduced.

[0033] In one embodiment, see Figure 1-4The boss 103 is in the shape of a circular step. Since the bearings or washers are circular, in order to provide stable support and obtain the minimum finishing area, the upper surface of the boss 103 is circular and equal to the outer diameter of the bearing or washer.

[0034] In one embodiment, see Figure 2 In order to facilitate the assembly of the planetary gear assembly 2, the planetary gear assembly 2 includes a planetary gear body 21, a bearing assembly 22 and a planetary shaft body 23. The planetary shaft body 23 is inserted into the planetary carrier body 1, and the bearing assembly 22 is sleeved on the outer side of the planetary shaft body 23. The planetary gear body 21 is sleeved on the outer side of the bearing assembly 22. The upper end surface and the lower end surface of the bearing assembly 22 are respectively abutted against the bosses 103 on the two side walls of the accommodating window 102. The planetary gear body 21 is first sleeved on the bearing assembly 22, and then the bearing assembly 22 is abutted and positioned on the boss 103, and the two are inserted into the accommodating window 102. Finally, the planetary shaft body 23 is inserted through the bearing assembly 22 and assembled in the accommodating window 102.

[0035] In this embodiment, during disassembly, the planetary shaft 23 is first removed from the planetary carrier 1 , and then the planetary gear body 21 and the bearing assembly 22 are removed from the accommodating window 102 , and finally the bearing assembly 22 is removed from the planetary gear body 21 .

[0036] In one embodiment, see Figure 2 In order to facilitate the insertion of the planetary shaft body 23, one end of the planetary frame body 1 is provided with a plurality of planetary shaft holes 104 corresponding to the accommodating windows 102. When there are four accommodating windows 102, there are also four planetary shaft holes 104. The planetary shaft holes 104 penetrate the accommodating windows 102 and the corresponding two bosses 103. The planetary shaft holes 104 specifically start at the left end of the planetary frame body 1, penetrate the corresponding accommodating windows 102 from left to right, and also extend into the boss 103 on the right side to form a slot in the boss 103. Therefore, the planetary shaft body 23 is inserted into the planetary shaft hole 104, and the planetary shaft body 23 penetrates the accommodating window 102 along the planetary shaft hole 104 and is inserted into the slot on the right boss 103.

[0037] In this embodiment, the planetary shaft body 23 is inserted into the planetary carrier body 1 through the planetary shaft hole 104 , so that the central axis positioning of the planetary gear body 21 and the bearing assembly 22 can be formed.

[0038] In one embodiment, see Figure 2The shape of the planetary shaft hole 104 matches the shape of the planetary shaft body 23, so that the planetary shaft body 23 is embedded in the planetary shaft hole 104, that is, the length of the planetary shaft body 23 is equal to the length of the planetary shaft hole 104, avoiding the formation of depressions or protrusions.

[0039] In one embodiment, see Figure 2 The bearing assembly 22 includes a bearing 221, an outer sleeve 222, an inner sleeve 223 and a retaining ring 224. A pair of the outer sleeves 222 abut against both sides of the retaining ring 224. A pair of the bearings 221 abut against the opposite sides of the two outer sleeves 222. The two ends of the inner sleeve 223 are inserted between the inner sides of the two inner sleeves 223, and the two ends abut against the two bearings 221 respectively. The inner sleeve 223 and the outer sleeve 222 serve as positioning frames for the bearings, so that they are distributed in the planetary gear body 21. The retaining ring 224 is correspondingly clamped in the clamping groove of the planetary gear body 21 to prevent the bearings 221 on both sides from axial movement.

[0040] In this embodiment, the retaining ring 224 can be installed in the planetary gear body 21 to form a middle separation position, and then the inner spacer 223 and the outer spacer 222 are installed on both sides of the retaining ring 224 respectively, and finally the bearing 221 is inserted.

[0041] In one embodiment, see Figure 2-4 The ends of the two bearings 221 that are separated from each other are respectively in contact with the two corresponding bosses 103, and positioning is achieved through the contact between the bosses 103 and the bearings 221.

[0042] In one embodiment, see Figure 2 , the planetary shaft body 23 is a two-stage stepped shaft, and the shaft diameter increases from left to right, and forms a step 2301, the step 2301 abuts against the bearing 221 on the corresponding side, so as to form a positioning at one end of the bearing 221, which is convenient for controlling the insertion depth of the planetary shaft body 23, that is, the end face of the bearing 221 on this side abuts against the step 2301 and the boss 103, and the step 2301 is located on the inner side of the planetary shaft hole 104 of the boss 103. In order to reduce the complexity of processing and match the stepped assembly of the planetary shaft body 23, the diameter of the hole of the planetary shaft hole 104 that passes through the accommodating window 102 from the left end is equal to the larger outer diameter of the stepped shaft, and the diameter of the hole formed by the planetary shaft hole 104 on the boss 103 at the other end is equal to the smaller outer diameter of the stepped shaft, so as to avoid the formation of a stepped hole in the hole setting, thereby reducing the complexity of processing.

[0043] In one embodiment, see Figure 1-4In order to ensure that there is sufficient clearance between the planetary gear body 21 and the accommodating window 102 when the planetary gear assembly 2 is assembled into the accommodating window 102 to avoid interference during rotation, the length of the bearing assembly 22 is greater than the thickness of the planetary gear body 21, so that when the boss 103 abuts against both ends of the bearing assembly 22, the planetary gear body 21 can be suspended, so that when it is assembled into the accommodating window 102, there is sufficient clearance to avoid interference between the planetary gear body 21 and the accommodating window 102 during rotation.

[0044] In order to better understand the present invention, the following Figures 1 to 4 The technical solution of the utility model is described in detail: a boss 103 is provided in the receiving window 102 of the planetary carrier 1, and the boss 103 is located on the left and right side walls of the receiving window 102, directly opposite to the two end surfaces of the planetary gear, and the boss 103 is aligned with the axial position of the planetary gear, and is used to abut against the bearing or gasket on the planetary gear. As a contact surface, it is only necessary to fine-machine the surface of the boss 103 to obtain sufficient accuracy for matching the planetary carrier 1 and the planetary gear assembly; during assembly, the planetary gear body 21 is first mounted on the bearing assembly 22, and then the bearing assembly 22 is positioned in abutment with the boss 103, and the two are inserted into the receiving window 102, and finally the planetary shaft body 23 is inserted through the bearing assembly 22 and assembled in the receiving window 102.

[0045] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A planet carrier with an accommodating window, characterized in that: include: A planetary carrier body, wherein a central axis cavity is provided on the planetary carrier body and passes through the central axis cavity along its axis. A plurality of accommodating windows are provided on the outer circumference of the planetary carrier body, wherein the accommodating windows are communicated with the central axis cavity. Both side walls of the accommodating windows are provided with bosses, and opposite sides of two corresponding bosses respectively form two end positioning planes for inserting planetary gears.

2. The planet carrier with an accommodating window according to claim 1, characterized in that: The boss is in the shape of a circular step.

3. The planet carrier with an accommodating window according to claim 2, characterized in that: One end of the planet carrier body is provided with a plurality of planet shaft holes corresponding to the accommodating windows. The planet shaft holes penetrate the accommodating windows and the corresponding two bosses for inserting the planet shaft bodies.

4. The planet carrier with an accommodating window according to claim 3, characterized in that: The shape of the planetary shaft hole matches the shape of the planetary shaft body, so that the planetary shaft body is embedded in the planetary shaft hole.

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