Planet carrier and planet wheel assembling structure

Abstract

The utility model discloses a planet carrier and planet wheel assembling structure, which belongs to the technical field of planet gear mechanisms and comprises a planet carrier and a plurality of planet wheels, the planet wheels are rotatably arranged on the planet carrier, the planet carrier comprises a front ring frame and a rear ring frame which are oppositely arranged, a fixing column is fixedly connected between the front ring frame and the rear ring frame, and the fixing column is fixedly connected with the planet carrier. An extension sleeve is arranged on the end face, away from the front ring frame, of the rear ring frame in the axial direction of the rear ring frame in a protruding mode, a planet shaft is installed between the front ring frame and the rear ring frame, a blocking edge is arranged at one end of the planet shaft in a protruding mode, the other end of the planet shaft sequentially penetrates through the front ring frame and the extension sleeve and then extends out of the extension sleeve, and a locking nut is installed at the end, opposite to the blocking edge, of the planet shaft. The planet gear is rotatably arranged on the planet shaft. According to the planet carrier and planet wheel assembling structure, loads borne by the two ends of the planet shaft are in a balanced state, so that the connection stability between the planet shaft and the planet carrier is improved, and stable and continuous work of the planet wheel is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of planetary gear mechanisms, in particular to a planet carrier and planetary wheel assembly structure. Background Art

[0002] Planetary gears refer to a gear system that, in addition to being able to rotate around its own axis like the top shaft gear, also has its axis rotating around the axis of other gears along with the planetary carrier. It is mainly composed of a planetary carrier, planetary wheels, a sun gear and an inner ring gear. During assembly, multiple planetary wheels are rotatably installed on the planetary carrier, with the outer sides of the planetary wheels meshing with the inner ring gear and the inner sides of the planetary wheels meshing with the sun gear.

[0003] The traditional assembly method between the planet carrier and the planetary wheel is to first assemble the planetary wheel on the planetary shaft through the bearing, then insert the planetary shaft into the planetary shaft mounting hole of the planetary carrier, and fix it through the internal key. In the above-mentioned assembled planetary carrier planetary wheel structure, only one end of the planetary shaft is fixedly connected to the planetary carrier, and the other end of the planetary shaft is in a suspended state. This structure will affect the balance of the loads at both ends of the planetary shaft, which is not conducive to the stable connection between the planetary carrier and the planetary wheel, and easily cause the end of the planetary shaft connected to the planetary carrier to shake. Based on this, the inventor has made improvements to the assembly structure of the planetary carrier and the planetary wheel to ensure the stability of the connection between the two without affecting normal operation. Utility Model Content

[0004] The technical problem to be solved by the utility model is that in the prior art, the connection stability between the planetary shaft and the planetary carrier is poor, which easily leads to shaking between the two. Based on this, the utility model provides a planetary carrier and planetary wheel assembly structure with strong connection stability.

[0005] The utility model solves the technical problem by adopting the following technical solution: a planetary carrier and planetary wheel assembly structure, comprising a planetary carrier and a planetary wheel, the planetary wheel having a plurality of planetary wheels and being rotatably arranged on the planetary carrier, comprising a planetary carrier comprising a front ring frame and a rear ring frame which are arranged opposite to each other, a fixing column being fixedly connected between the front ring frame and the rear ring frame, an extension sleeve being protrudingly arranged on the end surface of the rear ring frame away from the front ring frame along the axial direction of the rear ring frame, a planetary shaft being installed between the front ring frame and the rear ring frame, a retaining edge being protrudingly arranged at one end of the planetary shaft, the other end of the planetary shaft successively passing through the front ring frame and the extension sleeve and then extending to the outside of the extension sleeve, a locking nut being installed at one end of the planetary shaft opposite to the retaining edge, and the planetary wheel being rotatably arranged on the planetary shaft.

[0006] Furthermore, the planetary shaft comprises a polished rod segment and a screw segment connected to each other, the retaining edge is arranged on one end of the polished rod segment away from the screw segment, and the locking nut is threadedly connected to the screw segment.

[0007] Furthermore, the front ring frame and the rear ring frame are both provided with through holes, the extension sleeve is arranged corresponding to the through holes, the bare rod segment passes through the through holes of the front ring frame and the rear ring frame in sequence, part of the screw segment is located in the extension sleeve, and part of the screw segment extends to the outside of the extension sleeve.

[0008] Furthermore, the outer sleeve of the screw section is provided with a disc spring, one side of the disc spring elastically abuts against the end surface of the extension sleeve, and the other side of the disc spring elastically abuts against the locking nut.

[0009] Furthermore, a bearing is provided between the planetary gear and the planetary carrier, an inner ring of the bearing is fixedly connected to the bare rod segment of the planetary shaft, and an outer ring of the bearing is fixedly connected to the planetary gear.

[0010] Furthermore, a plurality of grooves are provided on the edge of the retaining edge.

[0011] Furthermore, a reinforcement ring is coaxially arranged inside the front ring frame, and a connecting column is fixedly connected between the reinforcement ring and the front ring frame.

[0012] Furthermore, the minimum distance L1 from the planetary wheel to the center axis of the front frame is smaller than the inner diameter of the reinforcing ring, and the maximum distance L2 from the planetary wheel to the center axis of the front frame is larger than the outer diameter of the front frame.

[0013] Furthermore, reinforcing ribs are fixedly connected between the fixing column and the front frame and between the fixing column and the rear frame.

[0014] The beneficial effects of the utility model are as follows: the planetary carrier planetary gear assembly structure of the utility model designs the planetary carrier as a front ring frame and a rear ring frame that are relatively arranged front and back. When the planetary shaft for mounting the planetary gear is mounted on the planetary carrier, the two ends of the planetary shaft are supported on the front ring frame and the rear ring frame respectively, so that the loads on the two ends of the planetary shaft are in a balanced state, thereby improving the connection stability between the planetary shaft and the planetary carrier, which is conducive to the stable and continuous operation of the planetary gear. At the same time, by setting an extension sleeve, it is easier to make the connection part of the light rod section and the screw rod section located between the inner end surface of the rear ring frame and the locking nut, which is conducive to the installation of the planetary gear and the locking operation of the locking nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a three-dimensional diagram of the planet carrier and planet gear assembly structure of the utility model;

[0017] Figure 2 yes Figure 1A three-dimensional view of the planet carrier and planet gear assembly structure from another perspective;

[0018] Figure 3 yes Figure 1 The front view of the planet carrier and planet gear assembly structure shown;

[0019] Figure 4 yes Figure 3 The planet carrier and planet gear assembly structure is shown in a cross-sectional view along AA.

[0020] In the figure: 10, planet carrier, 11, front ring frame, 12, rear ring frame, 13, fixing column, 14, reinforcing rib, 15, reinforcing ring, 16, connecting column, 17, extension sleeve, 18, disc spring, 110, through hole, 20, planet carrier, 30, planet shaft, 31, retaining edge, 311, groove, 32, locking nut, 301, bare rod section, 302, screw section, 40, bearing. DETAILED DESCRIPTION

[0021] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0022] See also Figure 1-Figure 4 The utility model provides a planetary carrier and planetary wheel assembly structure, including a planetary carrier 10 and planetary wheels 20. The planetary wheels 20 have multiple and are evenly and rotatably installed on the planetary carrier 10. In this embodiment, there are three planetary wheels 20. In other embodiments, the number of planetary wheels 20 can be more than four, which can be set according to specific usage requirements and is not limited here.

[0023] The planetary frame 10 includes a front frame 11 and a rear frame 12 which are arranged relatively to each other. Both the front frame 11 and the rear frame 12 are annular structures, and the front frame 11 and the rear frame 12 are arranged coaxially. A fixing column 13 is fixedly connected between the front frame 11 and the rear frame 12, so that the front frame 11 and the rear frame 12 are relatively fixed by the fixing column 13. In this embodiment, there are three fixing columns 13, and they are evenly arranged between the front frame 11 and the rear frame 12 along the circumferential direction. It should be noted that the number of the fixing columns 13 is the same as the number of the planetary gears 20, and a planetary gear 20 is arranged between every two adjacent fixing columns 13.

[0024] In order to improve the connection strength between the fixing column 13 and the front frame 11 and the rear frame 12 , reinforcing ribs 14 are fixedly connected between the fixing column 13 and the front frame 11 and between the fixing column 13 and the rear frame 12 .

[0025] As a preferred embodiment, a reinforcing ring 15 is coaxially arranged inside the front ring frame 11, and a connecting column 16 is fixedly connected between the reinforcing ring 15 and the front ring frame 11. By arranging the reinforcing ring 15 and the connecting column 16, the structural strength of the front ring frame 11 is enhanced, and the front ring frame 11 is prevented from being easily deformed. At the same time, the structure composed of the front ring frame 11, the reinforcing ring 15 and the connecting column 16 is a hollow structure. Under the premise of ensuring the structural strength, the overall weight is effectively reduced, which facilitates lightweight production.

[0026] An extension sleeve 17 is protruded along the axial direction of the rear frame 12 on the end surface of the rear frame 12 away from the front frame 11, and both ends of the extension sleeve 17 are connected. A planet shaft 30 is installed between the front frame 11 and the rear frame 12, and a retaining flange 31 is protruded at one end of the planet shaft 30. The other end of the planet shaft 30 passes through the front frame 11 and the extension sleeve 17 in sequence and then extends to the outside of the extension sleeve 17. A locking nut 32 is installed at one end of the planet shaft 30 opposite to the retaining flange 31, and the planetary gear 20 is rotatably installed on the planet shaft 30. After the locking nut 32 is installed in place, the locking nut 32 abuts against one end surface of the extension sleeve 17, and the flange 31 abuts against the front frame 11, thereby fixing the planet shaft 30 between the front frame 11 and the rear frame 12.

[0027] Please refer again Figure 4 The planetary shaft 30 includes a polished rod section 301 and a screw section 302 connected to each other. The polished rod section 301 and the screw section 302 are coaxially arranged. The retaining edge 31 is arranged on the end of the polished rod section 301 away from the screw section 302. The locking nut 32 is threadedly connected with the screw section 302. The front ring frame 11 and the rear ring frame 12 are both provided with through holes 110. The extension sleeve 17 is arranged corresponding to the through holes 110. The polished rod section 301 passes through the through holes 110 of the front ring frame 11 and the rear ring frame 12 in sequence. Part of the screw section 302 is located in the extension sleeve 17, and part of the screw section 302 extends to the outside of the extension sleeve 17. By setting the extension sleeve 17, when processing the planetary shaft 30, on the premise of ensuring that the light rod segment 301 meets the length requirement, the screw segment 302 can be appropriately processed to be longer, so as to ensure that when the light rod segment 301 passes through the two through holes 110 at the same time, the locking nut 32 can be connected to the screw segment 302 and lock the planetary shaft 30 between the front ring frame 11 and the rear ring frame 12, that is, it is ensured that the connection part between the light rod segment 301 and the screw segment 302 is located in the extension sleeve 17, preventing the screw segment 302 from being located in the gap clamped by the front ring frame 11 and the rear ring frame 12, thereby affecting the installation operation of installing the planetary gear 20 on the light rod segment 301.

[0028] As a preferred embodiment, the outer sleeve of the screw section 302 is provided with a disc spring 18, one side of the disc spring 18 elastically abuts against the end surface of the extension sleeve 17, and the other side of the disc spring 18 elastically abuts against the locking nut 32. When the locking nut 32 is tightened, the disc spring 18 can be squeezed between the extension sleeve 17 and the locking nut 32, thereby pre-tightening the locking nut 32 to prevent the locking nut 32 from loosening easily. In addition, the disc spring 18 is made of spring steel to withstand a large load and is not easily damaged.

[0029] A bearing 40 is arranged between the planetary gear 20 and the planetary shaft 30. The inner ring of the bearing 40 is fixedly connected to the light rod section 301 of the planetary shaft 30, and the outer ring of the bearing 40 is fixedly connected to the planetary gear 20. The bearing 40 is arranged to improve the rotation smoothness of the planetary gear 20, and at the same time effectively support the bearing 40, thereby improving the working stability of the planetary gear 20.

[0030] During assembly, the bearing 40 is first installed on the planetary wheel 20, and then the combination of the two is set in the gap between the front ring frame 11 and the rear ring frame 12, and then the planetary shaft 30 passes through the front ring frame 11, the bearing 40 and the rear ring frame 12 in sequence, and finally the locking nut 32 is installed on the planetary shaft 30.

[0031] As a preferred embodiment, a plurality of grooves 311 are provided on the edge of the retaining edge 31. During installation, a fixing sleeve matching the outer structure of the retaining edge 31 can be sleeved on the retaining edge 31 to hold the retaining edge 31 in place and prevent the planetary shaft 30 from rotating, so as to facilitate the installation of the locking nut 32.

[0032] In addition, the minimum distance L1 from the planetary gear 20 to the center axis of the front ring frame 11 is smaller than the inner diameter of the reinforcement ring 15, and the maximum distance L2 from the planetary gear 20 to the center axis of the front ring frame 11 is larger than the outer diameter of the front ring frame 11, so that the outermost side of the planetary gear 20 can mesh with the ring gear, and the innermost side of the planetary gear 20 can mesh with the sun gear.

[0033] The planetary carrier and planetary gear assembly structure of the utility model designs the planetary carrier 10 as a front ring frame 11 and a rear ring frame 12 which are arranged relatively front and rear. When the planetary shaft 30 for mounting the planetary gear 20 is mounted on the planetary carrier 10, the two ends of the planetary shaft 30 are supported on the front ring frame 11 and the rear ring frame 12 respectively, so that the loads received by the two ends of the planetary shaft 30 are in a balanced state, thereby improving the connection stability between the planetary shaft 30 and the planetary carrier 10, which is conducive to the stable and continuous operation of the planetary gear 20. At the same time, by providing the extension sleeve 17, it is easier to make the connection part of the light rod section 301 and the screw rod section 302 located between the inner end surface of the rear ring frame 12 and the locking nut 32, which is conducive to the installation of the planetary gear 20 and the locking operation of the locking nut 32.

[0034] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A planet carrier and planet wheel assembly structure, comprising a planet carrier and planet wheels, wherein the planet wheels are plural and rotatably arranged on the planet carrier, and characterized in that: The planetary frame comprises a front ring frame and a rear ring frame which are arranged opposite to each other, a fixing column being fixedly connected between the front ring frame and the rear ring frame, an extension sleeve being protruded along the axial direction of the rear ring frame on the end surface of the rear ring frame away from the front ring frame, a planetary shaft being installed between the front ring frame and the rear ring frame, a retaining edge being protruded at one end of the planetary shaft, and the other end of the planetary shaft sequentially passes through the front ring frame and the extension sleeve and then extends to the outside of the extension sleeve, a locking nut is installed at one end of the planetary shaft opposite to the retaining edge, and the planetary wheel is rotatably arranged on the planetary shaft.

2. The planet carrier and planet gear assembly structure according to claim 1, characterized in that: The planetary shaft comprises a polished rod section and a screw rod section which are connected to each other. The retaining edge is arranged on one end of the polished rod section away from the screw rod section. The locking nut is threadedly connected to the screw rod section.

3. The planet carrier and planet gear assembly structure according to claim 2, characterized in that: The front ring frame and the rear ring frame are both provided with through holes, the extension sleeve is arranged corresponding to the through holes, the bare rod segment passes through the through holes of the front ring frame and the rear ring frame in sequence, part of the screw segment is located in the extension sleeve, and part of the screw segment extends to the outside of the extension sleeve.

4. The planet carrier and planet gear assembly structure according to claim 2, characterized in that: The outer sleeve of the screw section is provided with a disc spring, one side of the disc spring elastically abuts against the end surface of the extension sleeve, and the other side of the disc spring elastically abuts against the locking nut.

5. The planet carrier and planet gear assembly structure according to claim 2, characterized in that: A bearing is arranged between the planetary gear and the planetary carrier, the inner ring of the bearing is fixedly connected to the bare rod section of the planetary shaft, and the outer ring of the bearing is fixedly connected to the planetary gear.

6. The planet carrier and planet gear assembly structure according to claim 1, characterized in that: A plurality of grooves are arranged on the edge of the retaining edge.

7. The planet carrier and planet gear assembly structure according to claim 1, characterized in that: A reinforcement ring is coaxially arranged inside the front ring frame, and a connecting column is fixedly connected between the reinforcement ring and the front ring frame.

8. The planet carrier and planet gear assembly structure according to claim 7, characterized in that: The minimum distance L1 from the planetary wheel to the center axis of the front ring frame is smaller than the inner diameter of the reinforcing ring, and the maximum distance L2 from the planetary wheel to the center axis of the front ring frame is larger than the outer diameter of the front ring frame.

9. The planet carrier and planet gear assembly structure according to claim 1, characterized in that: Reinforcing ribs are fixedly connected between the fixing column and the front ring frame and between the fixing column and the rear ring frame.

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