Planetary reducer

Abstract

The utility model discloses a planetary reducer which comprises a first connecting flange, an inner gear ring and a second connecting flange, a first limiting table is arranged on the edge of the end portion of one end of the first connecting flange and extends towards the second connecting flange, and / or a second limiting table is arranged on the edge of the end portion of one end of the second connecting flange and extends towards the second connecting flange. The second limiting table extends in the direction towards the first connecting flange. The inner gear ring is fixedly arranged between the first connecting flange and the second connecting flange, the outer side wall of at least one end of the inner gear ring abuts against the inner side wall of the first limiting table and / or the second limiting table, and the first limiting table and the second limiting table are used for positioning the inner gear ring. The inner gear ring is accurately positioned and limited through the limiting table, so that the connecting flange is stably matched with the inner gear ring, the speed reducer is compact in overall structure, radial positioning can be guaranteed by adopting the limiting table for outer step positioning, and meanwhile the size of the whole machine in the axial direction is prevented from being too large.

Description

Technical Field

[0001] This utility model belongs to the field of planetary gear reducer technology, and specifically relates to a planetary gear reducer. Background Technology

[0002] Speed ​​reducers have a wide range of applications, including machinery and material handling. Planetary speed reducers are commonly used components in mechanical equipment. They can reduce the speed of a high-speed rotating motor to the required speed while maintaining a stable output torque. Planetary speed reducers mainly consist of planetary gears, planet carriers, a sun gear, an internal gear ring, and bearings. Service life is a crucial indicator of a planetary speed reducer's quality, and factors affecting its lifespan include the strength of components, connection methods, thermal balance, and impact vibration.

[0003] The multiple components in a planetary gear reducer need to be positioned to facilitate locking during installation. Existing planetary gear reducers use a stepped positioning structure inside the reducer to achieve this positioning. However, with this internal stepped positioning method, all components inside the reducer need to avoid this positioning structure, resulting in a non-compact structure, wasted space, and ultimately affecting the use of the reducer. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a planetary gear reducer to solve the problem of the planetary gear reducer's non-compact structure.

[0005] This utility model embodiment provides a planetary gear reducer, including:

[0006] A first connecting flange, an internal gear ring, and a second connecting flange, wherein a first limiting platform is provided at one end edge of the first connecting flange, the first limiting platform extending toward the second connecting flange, and / or a second limiting platform is provided at one end edge of the second connecting flange, the second limiting platform extending toward the first connecting flange.

[0007] The internal gear ring is fixed between the first connecting flange and the second connecting flange. The outer side wall of at least one end of the internal gear ring abuts against the inner side wall of the first limiting platform and / or the second limiting platform. The first limiting platform and the second limiting platform are used to position the internal gear ring.

[0008] Optionally, one end of the internal gear ring abuts against one end of the first connecting flange and the outer side wall of one end of the internal gear ring abuts against the inner side wall of the first limiting platform, and the other end of the internal gear ring abuts against one end of the second connecting flange and the outer side wall of the other end of the internal gear ring abuts against the inner side wall of the second limiting platform.

[0009] Optionally, the outer wall of one end of the internal gear ring is clearance-fitted with the inner wall of the first limiting platform, and the outer wall of the other end of the internal gear ring is clearance-fitted with the inner wall of the second limiting platform; and / or

[0010] The first connecting flange, the internal gear ring, and the second connecting flange are connected by screws, with each screw passing through the internal gear ring and connecting the first connecting flange and the second connecting flange.

[0011] Optionally, the first limiting platform is an annular structure arranged along the first connecting flange, and the second limiting platform is an annular structure arranged along the second connecting flange.

[0012] Optionally, the planetary reducer further includes: an input shaft, planetary gears, a planet carrier, and a transmission structure, wherein the planetary gears are mounted on the planet carrier;

[0013] The transmission structure includes a transmission shaft and a spiral bevel gear structure. One end of the transmission shaft is connected to the planetary carrier, and the other end of the transmission shaft is connected to the spiral bevel gear structure.

[0014] Optionally, the planetary carrier is connected to one end of the drive shaft via keyed teeth, the planetary carrier having internal keyed teeth and one end of the drive shaft having external keyed teeth, the planetary carrier and the drive shaft engaging via the internal keyed teeth and the external keyed teeth; and / or

[0015] The drive shaft and the spiral bevel gear structure are an integral part of each other.

[0016] Optionally, the planetary reducer further includes:

[0017] The bearing housing, housing, and bearing are provided. One end of the bearing housing is connected to the other end of the second connecting flange, and the other end of the bearing housing is connected to the housing. The bearing is disposed in the bearing housing and sleeved on the transmission shaft. The outer side wall of the bearing housing is provided with a groove, and the groove is provided with ribs.

[0018] Optionally, the groove extends circumferentially along the bearing seat, and there are multiple ribs, which are spaced apart circumferentially along the bearing seat.

[0019] Optionally, the internal gear ring includes a first internal gear ring and a second internal gear ring, wherein one end of the first internal gear ring abuts against the end of one end of the first connecting flange, the outer side wall of one end of the first internal gear ring abuts against the inner side wall of the first limiting platform, and a third limiting platform is provided at the edge of the other end of the first internal gear ring.

[0020] One end of the second internal gear ring abuts against the other end of the first internal gear ring, and the outer side wall of one end of the second internal gear ring abuts against the inner side wall of the third limiting platform. The other end of the second internal gear ring abuts against the end of one end of the second connecting flange, and the outer side wall of the other end of the second internal gear ring abuts against the inner side wall of the second limiting platform.

[0021] Optionally, the planetary reducer further includes: a first planetary gear, a second planetary gear, an input shaft, and a transmission structure, wherein the first planetary gear meshes with the first internal gear ring, and the second planetary gear meshes with the second internal gear ring;

[0022] It also includes a first planetary carrier and a second planetary carrier. The first planetary gear is disposed at one end of the first planetary carrier, and the second planetary gear is disposed at one end of the second planetary carrier. One end of the input shaft meshes with the first planetary gear, and the second planetary gear meshes with the other end of the first planetary carrier. The other end of the second planetary carrier is connected to the transmission structure.

[0023] In this embodiment of the planetary reducer, a first limiting platform is provided at one end edge of the first connecting flange, and a second limiting platform is provided at one end edge of the second connecting flange. An internal gear ring is fixed between the first and second connecting flanges. The outer side wall of at least one end of the internal gear ring abuts against the inner side wall of the first and / or second limiting platforms. The first and second limiting platforms are used to position the internal gear ring. The first and second limiting platforms accurately position and limit the first connecting flange, the internal gear ring, and the second connecting flange, ensuring a stable fit between the connecting flange and the internal gear ring. This results in a compact overall structure of the planetary reducer, saving radial installation volume. Using limiting platforms for external stepped positioning ensures radial positioning while preventing excessive axial dimensions of the entire machine. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the planetary reducer in an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the planetary reducer in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the planetary carrier and the drive shaft cooperating in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of a planetary carrier in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram showing the connection between the drive shaft and the spiral bevel gear structure in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram of the bearing housing in an embodiment of the present utility model;

[0030] Figure 7 A schematic diagram showing the fit between the pin and the outer ring;

[0031] Figure 8 This is a schematic diagram of the outer ring structure;

[0032] Figure 9 This is a schematic diagram of the distribution of needle rollers;

[0033] Figure 10 This is a structural diagram of a pin.

[0034] Figure Labels

[0035] Input axis 10;

[0036] First connecting flange 21; Second connecting flange 22;

[0037] First limiting stage 23; Second limiting stage 24;

[0038] First internal gear ring 31; Second internal gear ring 32; Third limiting platform 33;

[0039] First planetary gear 41; Second planetary gear 42;

[0040] First planetary support 43; Second planetary support 44;

[0041] Drive shaft 50; spiral bevel gear structure 51;

[0042] Bearing housing 60; bearing 61; groove 62; rib 63;

[0043] Enclosure size 70; Input flange size 80;

[0044] Needle roller 91; pin 92; outer ring 93. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0046] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] The following is in conjunction with the appendix Figures 1 to 10 The planetary reducer of this utility model embodiment will be described in detail below.

[0048] The planetary reducer of this embodiment may include: a first connecting flange 21, an internal gear ring, and a second connecting flange 22, which may be coaxially arranged. A first limiting platform 23 may be provided at one end edge of the first connecting flange 21, extending towards the second connecting flange 22 and circumferentially around the first connecting flange 21. And / or, a second limiting platform 24 may be provided at one end edge of the second connecting flange 22, extending towards the first connecting flange 21 and circumferentially around the second connecting flange 22.

[0049] The internal gear ring can be fixed between the first connecting flange 21 and the second connecting flange 22. At least one end of the internal gear ring abuts against the end of one end of the connecting flange, and the outer side wall of at least one end of the internal gear ring abuts against the inner side wall of the first limiting platform 23 and / or the second limiting platform 24. The first limiting platform 23 and the second limiting platform 24 are used to position the internal gear ring. For example, the edge of one end of the first connecting flange 21 can be provided with a first limiting platform 23, which can extend in the direction toward the second connecting flange 22. One end of the internal gear ring can abut against the end of one end of the first connecting flange 21, and the outer side wall of one end of the internal gear ring can abut against the inner side wall of the first limiting platform 23. Alternatively, a second limiting platform 24 may be provided at the end edge of one end of the second connecting flange 22. The second limiting platform 24 may extend in the direction toward the first connecting flange 21. The other end of the internal gear ring may abut against the end of one end of the second connecting flange 22, and the outer side wall of the other end of the internal gear ring may abut against the inner side wall of the second limiting platform 24.

[0050] The internal gear ring is fixed between the first connecting flange 21 and the second connecting flange 22. One end of the internal gear ring can be engaged in the first limiting platform 23, and the other end can be engaged in the second limiting platform 24. One end of the internal gear ring can abut against the end of one end of the first connecting flange 21, and the outer side wall of one end of the internal gear ring can abut against the inner side wall of the first limiting platform 23. The other end of the internal gear ring can abut against the end of one end of the second connecting flange 22, and the outer side wall of the other end of the internal gear ring can abut against the inner side wall of the second limiting platform 24. The limiting platforms can accurately position and limit the first connecting flange, the internal gear ring, and the second connecting flange, so that the connecting flange and the internal gear ring can be stably matched. This makes the overall structure of the planetary reducer compact and saves radial installation volume. Using the limiting platforms for external stepped positioning can ensure radial positioning while preventing the overall size of the machine from being too large in the axial direction.

[0051] In this embodiment, the number of internal gear rings can be determined according to the actual number of reduction stages. The first-stage planetary reducer can have one internal gear ring, and the second-stage planetary reducer can have two internal gear rings. At least one end of the internal gear ring can be abutted by the limiting platform to ensure the controllability of the overall structure.

[0052] In this embodiment, the internal gear ring may or may not have a limiting platform. If one end of the first connecting flange has a first limiting platform and one end of the second connecting flange has a second limiting platform, then the internal gear ring does not need a limiting platform, and both ends of the internal gear ring are abutted by the first and second limiting platforms respectively. If one end of the first connecting flange has a first limiting platform, but one end of the second connecting flange does not have a second limiting platform, then a fourth limiting platform needs to be provided at the end of the internal gear ring near the second connecting flange, and the inner sidewall of the fourth limiting platform abuts against the outer sidewall of the end of the second connecting flange near the internal gear ring. If one end of the first connecting flange does not have a first limiting platform, but one end of the second connecting flange has a second limiting platform, then a fifth limiting platform needs to be provided at the end of the internal gear ring near the first connecting flange, and the inner sidewall of the fifth limiting platform abuts against the outer sidewall of the end of the first connecting flange near the internal gear ring. The specific configuration can be adjusted according to actual conditions, and this embodiment does not limit this.

[0053] In this embodiment, there may be one or more first limiting platforms. In some implementations, the first limiting platform may be a complete annular structure disposed at the end edge of one end of the first connecting flange, or it may be multiple discontinuous arc-shaped structures disposed at the end edge of one end of the first connecting flange, or it may be any other possible structural form. The specific form can be set according to the actual situation, and this specification does not limit it in this way.

[0054] In this embodiment, there may be one or more second limiting platforms. In some implementations, the second limiting platform may be a complete annular structure disposed at the end edge of one end of the second connecting flange, or it may be multiple discontinuous arc-shaped structures disposed at the end edge of one end of the second connecting flange, or any other possible structural form. The specific form can be set according to the actual situation, and this specification does not limit it in this way.

[0055] In this embodiment, there may be one or more fourth limiting platforms. In some implementations, the fourth limiting platform may be a complete annular structure disposed at the end edge of the inner gear ring near the second connecting flange, or it may be multiple discontinuous arc-shaped structures disposed at the end edge of the inner gear ring near the second connecting flange, or any other possible structural form. The specific configuration can be set according to the actual situation, and this specification does not limit the implementation of the embodiments.

[0056] In this embodiment, there may be one or more fifth limiting platforms. In some implementations, the fifth limiting platform may be a complete annular structure disposed at the end edge of the inner gear ring near the first connecting flange, or it may be multiple discontinuous arc-shaped structures disposed at the end edge of the inner gear ring near the first connecting flange, or any other possible structural form. The specific form can be set according to the actual situation, and this specification does not limit it in this way.

[0057] In the planetary reducer of this utility model embodiment, a first limiting platform can be provided at the end edge of one end of the first connecting flange, and a second limiting platform can be provided at the end edge of one end of the second connecting flange. The internal gear ring is fixed between the first connecting flange and the second connecting flange. The internal gear ring can be accurately positioned and limited by at least one of the first limiting platform and the second limiting platform, so that the connecting flange and the internal gear ring can be stably matched, making the overall structure of the planetary reducer compact and applicable to stacker cranes. Using the limiting platform for external stepped positioning can ensure radial positioning while preventing the overall machine from being too large in the axial direction.

[0058] In some embodiments, the planetary reducer may further include: planetary gears, an input shaft 10, a planetary carrier, and a transmission structure. The planetary gears are mounted on the planetary carrier and mesh with an internal gear ring. One end of the input shaft 10 meshes with the planetary gears. The planetary carrier is connected to the transmission structure. One end of the input shaft 10 drives the planetary gears to rotate, and the planetary gears drive the planetary carrier to rotate during rotation. The planetary carrier drives the transmission structure for transmission. The other end of the first connecting flange 21 may be connected to an input flange 80. The input shaft 10 may pass through the input flange 80 and the first connecting flange 21. A bearing may be installed in the first connecting flange 21 and sleeved on the input shaft 10. A sealing structure may be provided between the bearing and the inner wall of the first connecting flange 21 to improve the sealing effect.

[0059] In this embodiment, one end of the internal gear ring abuts against one end of the first connecting flange 21, and the outer side wall of one end of the internal gear ring abuts against the inner side wall of the first limiting platform 23. The other end of the internal gear ring abuts against one end of the second connecting flange 22, and the outer side wall of the other end of the internal gear ring abuts against the inner side wall of the second limiting platform 24. The outer side wall of one end of the internal gear ring and the inner side wall of the first limiting platform 23 can be in clearance fit, and the outer side wall of the other end of the internal gear ring and the inner side wall of the second limiting platform 24 can be in clearance fit.

[0060] In some embodiments, one end of the internal gear ring can be connected to the first connecting flange 21 by screws, and the other end of the internal gear ring can be connected to the second connecting flange 22 by screws. The first connecting flange 21, the internal gear ring, and the second connecting flange 22 are connected by screws, with each screw passing through the internal gear ring and connecting the first connecting flange 21 and the second connecting flange 22. For example, one end of the screw may pass through the first connecting flange 21 and the internal gear ring sequentially along the axial direction of the internal gear ring and connect to the second connecting flange 22; or, one end of the screw may pass through the second connecting flange 22 and the internal gear ring sequentially along the axial direction of the internal gear ring and connect to the first connecting flange 21. Multiple screws can be used during the connection process, and these screws can be evenly distributed to stably connect the internal gear ring and the connecting flanges.

[0061] In some embodiments, the first limiting platform 23 can be an annular structure provided along the first connecting flange 21, and the second limiting platform 24 can be an annular structure provided along the second connecting flange 22. The first limiting platform 23 and the second limiting platform 24 can be in shapes that match the first connecting flange 21 and the second connecting flange 22, such as an annular shape, so that the internal gear ring can be engaged in the limiting platform. The annular limiting platform can accurately position and limit the internal gear ring, so that the connecting flange and the internal gear ring can be stably matched.

[0062] In other embodiments, such as Figure 1 , Figures 3 to 5As shown, the planetary reducer may further include: an input shaft 10, planetary gears, a planet carrier, and a transmission structure, with the planetary gears mounted on the planet carrier. The transmission structure may include: a drive shaft 50 and a helical bevel gear structure 51. One end of the drive shaft 50 is connected to the planet carrier, which may be detachably connected or integrally and non-detachably connected. The other end of the drive shaft 50 is connected to the helical bevel gear structure 51, which may be integrally formed or detachably connected.

[0063] Optionally, the planetary carrier and one end of the drive shaft 50 can be connected by key meshing. The planetary carrier and the drive shaft are connected by key teeth. The spiral bevel gear structure and the drive shaft can be designed as an integral structure to improve the connection strength, ensure transmission accuracy, prevent the key teeth from shearing under high load, and avoid abnormal noise caused by poor alignment between the shaft and the hub.

[0064] Optionally, the planetary carrier may have internal key teeth, and one end of the drive shaft 50 may have external key teeth. The planetary carrier and the drive shaft 50 can mesh through the internal and external key teeth. In this invention, the planetary carrier and the drive shaft are designed separately, and the planetary carrier and the drive shaft are connected by key teeth. The helical bevel gear structure and the drive shaft are designed as a whole. While ensuring the alignment and rotational accuracy of the shaft and hub, the connection strength can be greatly improved compared with the strength of the flat key structure connection.

[0065] Optionally, the drive shaft 50 and the spiral bevel gear structure 51 can be an integral structure to improve the connection strength and ensure transmission accuracy.

[0066] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the planetary reducer may further include: a bearing housing 60, a housing 70, and a bearing 61. The bearing housing 60 may be disposed between the second connecting flange 22 and the housing 70. One end of the bearing housing 60 is connected to the other end of the second connecting flange 22, and the other end of the bearing housing 60 is connected to the housing 70. The bearing housing 60 may be connected to the second connecting flange 22 and the housing 70 by bolts. The bearing 61 is disposed in the bearing housing 60 and is sleeved on the drive shaft 50. There may be one or more bearings 61, for example, two bearings 61. The two bearings 61 may be spaced apart along the length of the drive shaft 50 to ensure stable rotation of the drive shaft.

[0067] In this embodiment, the outer wall of the bearing housing 60 may be provided with a groove 62, which may be annular. Ribs 63 may be provided within the groove 62, and the number of ribs 63 may be multiple. These ribs may be evenly spaced. The ribs enhance the structural strength of the bearing housing. While ensuring strength, forming a groove on the outer wall of the bearing housing reduces material usage and weight, shortens the heat transfer path, accelerates heat transfer, increases the overall heat dissipation capacity, and improves the product's appearance. The housing 70 may be provided with a detachable end cover and a mounting cavity. An output mechanism may be installed in the mounting cavity. A spiral bevel gear structure 51 may mesh with the output mechanism, and the rotation of the spiral bevel gear structure 51 drives the output mechanism to rotate.

[0068] Optionally, such as Figure 1 , Figure 2 and Figure 6 As shown, the groove 62 can extend circumferentially along the bearing housing 60, and there can be multiple ribs 63. The ribs 63 can be connected to the inner wall of the groove 62, and the multiple ribs 63 can be spaced apart circumferentially along the bearing housing 60. The multiple ribs 63 can be evenly spaced circumferentially along the bearing housing 60, so that the structural strength is symmetrical and stable, and it is convenient for uniform heat dissipation. The bearing housing 60, the connecting flange, and the internal gear ring can be coaxially arranged.

[0069] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, when the planetary reducer is a two-stage planetary reducer, the internal gear ring may include a first internal gear ring 31 and a second internal gear ring 32. One end of the first internal gear ring 31 abuts against the end of one end of the first connecting flange 21, and the outer side wall of one end of the first internal gear ring 31 abuts against the inner side wall of the first limiting platform 23. One end of the first internal gear ring 31 can be engaged in the first limiting platform 23, and the positioning method between one end of the first internal gear ring 31 and the first limiting platform 23 can be a clearance fit.

[0070] In this embodiment, a third limiting platform 33 is provided at the end edge of the other end of the first internal gear ring 31. The third limiting platform 33 can extend in the direction toward the second connecting flange 22 and can extend circumferentially along the first internal gear ring 31. The third limiting platform 33 can be an annular structure, for example, a circular annular structure. One end of the second internal gear ring 32 abuts against the end of the other end of the first internal gear ring 31. One end of the second internal gear ring 32 can be engaged in the third limiting platform 33. The positioning method between one end of the second internal gear ring 32 and the third limiting platform 33 can be a clearance fit. The outer side wall of one end of the second internal gear ring 32 abuts against the inner side wall of the third limiting platform 33. The third limiting platform can be used to position and limit the second internal gear ring 32.

[0071] In this embodiment, the other end of the second internal gear ring 32 abuts against the end of one end of the second connecting flange 22, and the outer side wall of the other end of the second internal gear ring 32 abuts against the inner side wall of the second limiting platform 24. The other end of the second internal gear ring 32 can be engaged in the second limiting platform 24. The other end of the second internal gear ring 32 and the second limiting platform 24 can be positioned by a clearance fit, which makes the entire reducer structure more compact and saves radial installation volume. In this utility model, the limiting platform can be used to position and limit the internal gear ring, maintaining a stable fit.

[0072] In this embodiment, there may be one or more third limiting platforms. In some implementations, the third limiting platform may be a complete annular structure disposed at the end edge of the other end of the first internal gear ring 31, or it may be multiple discontinuous arc-shaped structures disposed at the end edge of the other end of the first internal gear ring 31, or it may be any other possible structural form. The specific form can be set according to the actual situation, and this specification does not limit it in this way.

[0073] In some embodiments, one end of the first internal gear ring 31 can be connected to the first connecting flange 21 by screws, and the second internal gear ring 32 can be connected to the second connecting flange 22 by screws. Multiple screws can be used during the connection process, and these screws can be evenly spaced to ensure a stable connection between the internal gear ring and the connecting flange.

[0074] In some embodiments, the second limiting platform may not be provided at one end of the second connecting flange 22, and a fourth limiting platform may be provided at the other end of the second internal gear ring, with the inner sidewall of the fourth limiting platform abutting against the outer sidewall of the second connecting flange. This method can also achieve the positioning and limiting of the two internal gear rings, and the specific choice can be made according to the actual situation, which is not limited in this specification.

[0075] In this embodiment, there can be one or more fourth limiting platforms. In some implementations, the fourth limiting platform can be a complete annular structure located at the end edge of the second internal gear ring near the second connecting flange, or it can be multiple discontinuous arc-shaped structures located at the end edge of the second internal gear ring near the second connecting flange, or any other possible structural form. The specific configuration can be determined according to actual conditions, and this specification does not limit this. It is understood that in some implementations, more internal gear rings may be included, and their positioning method can refer to the positioning method of two internal gear rings. The specific configuration can be determined according to actual conditions, and this specification does not limit this.

[0076] In the embodiments of this utility model, such as Figure 1 , Figures 3 to 5As shown, the planetary reducer may include: a first planetary gear 41 and a second planetary gear 42, an input shaft 10, and a transmission structure. The number of first planetary gears 41 and second planetary gears 42 can both be multiple. The first planetary gear 41 can mesh with a first internal gear ring 31, and the second planetary gear 42 can mesh with a second internal gear ring 32. The planetary reducer may also include a first planetary carrier 43 and a second planetary carrier 44. The first planetary gear 41 can be disposed at one end of the first planetary carrier 43, and the second planetary gear 42 can be disposed at one end of the second planetary carrier 44. One end of the input shaft 10 can mesh with the first planetary gear 41, and the second planetary gear 42 meshes with the other end of the first planetary carrier 43. The other end of the second planetary carrier 44 can be connected to the transmission structure. The other end of the second planetary carrier 44 may have internal key teeth, and one end of the transmission shaft 50 may have external key teeth. The other end of the second planetary carrier 44 and the transmission shaft 50 can mesh via the internal and external key teeth.

[0077] Planetary gears can be mounted on a planetary carrier using bearings. The bearings housing the planetary gears can employ a full complement needle roller design, which reduces contact stress, improves wear resistance and strength, and extends the service life of both the bearing and the pin. For example, the bearings housing the planetary gears can be full complement needle roller bearings. Figures 7 to 10 As shown, the bearing can be composed of needle rollers 91, pins 92, and an outer ring 93. The needle rollers 91 are set on the outer ring 93, and full complement needle rollers can be used. The pins 92 are passed through the outer ring 93. The full complement needle roller design can prevent the needle rollers and pins from wearing out prematurely under high-speed rotation, so that the overall life of the machine meets the standard.

[0078] Optionally, the internal gear ring can be coaxially arranged with the first connecting flange 21 and the second connecting flange 22.

[0079] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A planetary reduction machine characterized by, include: A first connecting flange, an internal gear ring, and a second connecting flange, wherein a first limiting platform is provided at one end edge of the first connecting flange, the first limiting platform extending toward the second connecting flange, and / or a second limiting platform is provided at one end edge of the second connecting flange, the second limiting platform extending toward the first connecting flange. The internal gear ring is fixed between the first connecting flange and the second connecting flange. The outer side wall of at least one end of the internal gear ring abuts against the inner side wall of the first limiting platform and / or the second limiting platform. The first limiting platform and the second limiting platform are used to position the internal gear ring.

2. The planetary reduction machine of claim 1, wherein, One end of the internal gear ring abuts against one end of the first connecting flange, and the outer side wall of one end of the internal gear ring abuts against the inner side wall of the first limiting platform. The other end of the internal gear ring abuts against one end of the second connecting flange, and the outer side wall of the other end of the internal gear ring abuts against the inner side wall of the second limiting platform.

3. The planetary reduction machine of claim 2, wherein, The outer wall of one end of the internal gear ring is in clearance fit with the inner wall of the first limiting platform, and the outer wall of the other end of the internal gear ring is in clearance fit with the inner wall of the second limiting platform; and / or The first connecting flange, the internal gear ring, and the second connecting flange are connected by screws, with each screw passing through the internal gear ring and connecting the first connecting flange and the second connecting flange.

4. The planetary reduction machine of claim 1, wherein, The first limiting platform is an annular structure arranged along the first connecting flange, and the second limiting platform is an annular structure arranged along the second connecting flange.

5. The planetary reducer according to claim 1, characterized in that, Also includes: The system includes an input shaft, planetary gears, a planet carrier, and a transmission structure, wherein the planetary gears are mounted on the planet carrier. The transmission structure includes a transmission shaft and a spiral bevel gear structure. One end of the transmission shaft is connected to the planetary carrier, and the other end of the transmission shaft is connected to the spiral bevel gear structure.

6. The planetary reduction machine of claim 5, wherein, The planetary carrier is connected to one end of the drive shaft via keyed teeth. The planetary carrier has internal keyed teeth, and one end of the drive shaft has external keyed teeth. The planetary carrier and the drive shaft engage with the internal keyed teeth and the external keyed teeth; and / or The drive shaft and the spiral bevel gear structure are an integral part of each other.

7. The planetary reduction machine of claim 5, wherein, Also includes: The bearing housing, housing, and bearing are provided. One end of the bearing housing is connected to the other end of the second connecting flange, and the other end of the bearing housing is connected to the housing. The bearing is disposed in the bearing housing and sleeved on the transmission shaft. The outer side wall of the bearing housing is provided with a groove, and the groove is provided with ribs.

8. The planetary reduction machine of claim 7, wherein, The groove extends circumferentially along the bearing seat, and there are multiple ribs, which are spaced apart circumferentially along the bearing seat.

9. The planetary reduction machine of claim 1, wherein, The internal gear ring includes a first internal gear ring and a second internal gear ring, wherein... One end of the first internal gear ring abuts against the end of one end of the first connecting flange, the outer side wall of one end of the first internal gear ring abuts against the inner side wall of the first limiting platform, and a third limiting platform is provided at the edge of the other end of the first internal gear ring. One end of the second internal gear ring abuts against the other end of the first internal gear ring, and the outer side wall of one end of the second internal gear ring abuts against the inner side wall of the third limiting platform. The other end of the second internal gear ring abuts against the end of one end of the second connecting flange, and the outer side wall of the other end of the second internal gear ring abuts against the inner side wall of the second limiting platform.

10. The planetary reduction machine of claim 9, wherein, Also includes: The system comprises a first planetary gear, a second planetary gear, an input shaft, and a transmission structure, wherein the first planetary gear meshes with the first internal gear ring, and the second planetary gear meshes with the second internal gear ring. It also includes a first planetary carrier and a second planetary carrier. The first planetary gear is disposed at one end of the first planetary carrier, and the second planetary gear is disposed at one end of the second planetary carrier. One end of the input shaft meshes with the first planetary gear, and the second planetary gear meshes with the other end of the first planetary carrier. The other end of the second planetary carrier is connected to the transmission structure.

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