Planet carrier structure, output half shaft and speed reducer

Abstract

The utility model discloses a planet carrier structure, an output half shaft and a speed reducer, the planet carrier structure comprises a planet carrier main body, a torque transmission structure and an axial connecting structure, the planet carrier main body is provided with a first side platform and a second side platform which are oppositely arranged; the surface of the first side table is partially sunken in the direction close to the second side table to form a mounting groove, the torque transmission structure comprises a plurality of boss structures, the boss structures are distributed on the groove wall of the mounting groove, and the torque transmission structure is used for being matched with a plurality of matching structures arranged on the output half shaft to be mounted so as to transmit torque; the axial connecting structure comprises a plurality of connecting pieces which are located on the table top of the first side table, distributed along the periphery of the mounting groove and used for connecting the planet carrier and the output half shaft in the axial direction. According to the technical scheme, the planet carrier structure can bear large output torque through the torque transmission structure, the axial size when the planet carrier structure and the output half shaft are assembled is reduced, and the envelope size is reduced.

Description

Technical Field

[0001] The utility model relates to the design field of planetary reducers, in particular to a planetary frame structure, an output half shaft and a reduction device. Background Art

[0002] At present, the output interface of the general reducer planetary frame is connected to the half shaft in the form of spline, and there are also reducer planetary frame output interfaces that are connected by flanges and bolts. For the reducer output interface that adopts the form of spline output, since the transmission shaft also needs to adopt a spline interface, it is not conducive to shortening the length of the transmission shaft. For the reducer planetary frame output structure that adopts the flange and bolt form, the output torque has a great influence on the selection of the bolt distribution circle diameter and bolt specifications. Generally speaking, the greater the output torque, the larger the bolt distribution circle diameter or the larger the bolt specification, which is not conducive to platform development, and when transmitting the same output torque, the envelope size of the planetary frame of this solution is too large. Utility Model Content

[0003] The main purpose of the utility model is to provide a planetary carrier structure, an output half shaft and a reduction device, aiming to provide a planetary carrier structure, an output half shaft and a reduction device that can reduce the envelope size and reduce the influence of torque on the connecting parts.

[0004] In order to achieve the above-mentioned purpose, the planet carrier structure proposed in the utility model is used for assembly with the output half shaft, and includes:

[0005] A planet carrier body, the planet carrier body having a first side platform and a second side platform which are arranged opposite to each other, wherein a surface of the first side platform is partially recessed in a direction close to the second side platform to form a mounting groove;

[0006] A torque transmission structure, comprising a plurality of boss structures, each of which is arranged at the wall of the mounting groove, and the torque transmission structure is used to cooperate with a plurality of matching structures arranged on the output half shaft to transmit torque; and

[0007] The axial connection structure includes a plurality of connection members, which are located on the surface of the first side platform and arranged along the periphery of the mounting groove to axially connect the planet carrier and the output half shaft.

[0008] Optionally, the planet carrier structure further includes a bearing mounting structure, and the bearing mounting structure includes an annular protrusion arranged along the edge of the first side platform surface, and the annular protrusion is used for matching and mounting with the planet carrier support bearing.

[0009] Optionally, a step is provided on the outer edge side of the annular protrusion, and the number of the steps is set to be multiple.

[0010] Optionally, an accommodating space is provided between the first side platform and the second side platform, the accommodating space is used to accommodate the installation of the planetary gear, the accommodating space has a bottom surface close to the second side platform, and the bottom of the installation groove is arranged close to the bottom surface of the accommodating space.

[0011] Optionally, the boss structure has a boss side wall along a depth extension direction of the mounting groove, and a surface of the boss side wall is configured as an arc-shaped surface.

[0012] Optionally, along the direction from the bottom of the mounting groove toward the groove opening, the cross-sectional width of the boss structure gradually decreases; and / or,

[0013] The number of the boss structures is set to 3.

[0014] Optionally, the boss structure includes a first side wall, a second side wall and a third side wall along the depth extension direction of the mounting groove, wherein the first side wall and the third side wall are arranged opposite to each other, the first side wall and the third side wall are connected to the mounting groove wall, and the angle between the first side wall and the mounting groove wall is α, wherein 90°<α≤120°.

[0015] Optionally, the connecting member includes a threaded connection assembly, the threaded connection assembly includes a screw hole and a screw, the screw hole is provided at the boss structure, and the screw hole and the screw are used to cooperate and connect the planet carrier structure and the output half shaft.

[0016] An output half shaft comprises a connecting end, on which a plurality of matching structures are arranged, and the plurality of matching structures are used for matching and installing with a plurality of boss structures arranged on a planetary frame structure, and the planetary frame structure comprises the above-mentioned planetary frame structure.

[0017] A reduction gear comprises the above-mentioned planetary carrier structure and an output half shaft.

[0018] In the planetary carrier structure in the technical solution of the utility model, the planetary carrier structure includes a planetary carrier body, a torque transmission structure and an axial connection structure, the planetary carrier body has a first side platform and a second side platform which are arranged opposite to each other, the surface of the first side platform is partially recessed in a direction close to the second side platform to form a mounting groove, since the torque transmission structure is located in the mounting groove, specifically, a plurality of boss structures are arranged on the groove wall of the mounting groove, and each of the boss structures can be installed in cooperation with a plurality of matching structures provided on the output half shaft to transmit torque, thereby ensuring that the boss structure transmits torque while achieving the assembly position of the planetary carrier structure and the output half shaft when they are installed in cooperation in the mounting groove. In the mounting groove, since the mounting groove is formed by the depression of the first side platform surface, the overall envelope size can be reduced. In addition, the torque is transmitted by the boss structure, which also solves the problem of strict requirements on the strength and quantity of the threaded structure caused by the torque being borne by the threaded structure in the prior art. In addition, in the present application, an axial connection structure is also provided, and the axial connection structure includes a plurality of connecting parts, which are located at the first side platform surface and arranged along the periphery of the mounting groove to axially connect the planetary carrier and the output half shaft. The axial connection structure only plays a connecting role and does not need to bear torque. Therefore, its setting method is more flexible and changeable than the prior art, and the setting method of the connecting part can be selected according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the planetary carrier structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the planar structure of an embodiment of the planetary carrier structure of the utility model;

[0022] Figure 3 for Figure 2 Schematic diagram of the cross section at point A.

[0023] Description of Figure Numbers:

[0024]

[0025]

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] At present, the output interface of the general reducer planetary frame is connected to the half shaft in the form of spline, and there are also reducer planetary frame output interfaces that are connected by flanges and bolts. For the reducer output interface that adopts the form of spline output, since the transmission shaft also needs to adopt a spline interface, it is not conducive to shortening the length of the transmission shaft. For the reducer planetary frame output structure that adopts the flange and bolt form, the output torque has a great influence on the selection of the bolt distribution circle diameter and bolt specifications. Generally speaking, the greater the output torque, the larger the bolt distribution circle diameter or the larger the bolt specification, which is not conducive to platform development, and when transmitting the same output torque, the envelope size of the planetary frame of this solution is too large.

[0031] To solve the above problems, the utility model proposes a planetary carrier structure, an output half shaft and a reduction device, aiming to provide a planetary carrier structure, an output half shaft and a reduction device that can reduce the envelope size and reduce the influence of torque on the connecting parts. Figures 1 to 3 The present invention is a schematic structural diagram of an embodiment of the planetary carrier structure provided by the present invention.

[0032] Please refer to Figure 1 The planetary carrier structure 100 proposed in the utility model is used for assembly with the output half shaft, and includes a planetary carrier body 1, a torque transmission structure 2 and an axial connection structure 3, wherein the planetary carrier body 1 has a first side platform 11 and a second side platform 12 which are arranged opposite to each other, and the surface of the first side platform 11 is partially recessed in the direction close to the second side platform 12 to form a mounting groove 111, and the torque transmission structure 2 includes a plurality of boss structures 21, each of which is arranged at the groove wall of the mounting groove 111, and the torque transmission structure 2 is used to cooperate with a plurality of matching structures arranged on the output half shaft to transmit torque, and the axial connection structure 3 includes a plurality of connecting members 31, which are located at the surface of the first side platform 11 and are arranged along the periphery of the mounting groove 111, so as to axially connect the planetary carrier and the output half shaft.

[0033] In the planetary carrier structure 100 in the technical solution of the present utility model, the planetary carrier structure 100 includes a planetary carrier body 1, a torque transmission structure 2 and an axial connection structure 3. The planetary carrier body 1 has a first side platform 11 and a second side platform 12 which are arranged opposite to each other. The surface of the first side platform 11 is partially recessed in a direction close to the second side platform 12 to form a mounting groove 111. Since the torque transmission structure 2 is located in the mounting groove 111, specifically, a plurality of boss structures 21 are arranged on the groove wall of the mounting groove 111, and each of the boss structures 21 can be installed in cooperation with a plurality of matching structures provided on the output half shaft to transmit torque, thereby ensuring that the boss structure 21 transmits torque while realizing the installation of the planetary carrier structure 100 and the output half shaft when they are matched and installed. The matching part is in the installation groove 111. Since the installation groove 111 is formed by a depression in the surface of the first side platform 11, the overall envelope size can be reduced. In addition, the torque is transmitted by the boss structure 21, which also solves the problem of strict requirements on the strength and quantity of the threaded structure caused by the torque borne by the threaded structure in the prior art. In addition, in the present application, an axial connection structure 3 is also provided. The axial connection structure 3 includes a plurality of connecting members 31, which are located on the surface of the first side platform 11 and arranged along the periphery of the installation groove 111 to axially connect the planetary carrier and the output half shaft. The axial connection structure 3 only plays a connecting role and does not need to bear torque. Therefore, its setting method is more flexible and changeable than the prior art, and the setting method of the connecting member 31 can be selected according to actual needs.

[0034] Please refer to Figure 1 and Figure 3The planetary carrier structure 100 also includes a bearing mounting structure 4, and the bearing mounting structure 4 includes an annular protrusion 41 arranged along the edge of the table surface of the first side platform 11. The annular protrusion 41 is used to cooperate with the planetary carrier support bearing for installation. The planetary carrier support bearing is installed to the planetary carrier structure 100 through the annular protrusion 41, which can support the planetary carrier structure 100 and reduce friction. In addition, the way in which the planetary carrier support bearing is installed to the planetary carrier through the annular protrusion 41 is relatively simple and quick to assemble.

[0035] Furthermore, a step 411 is provided on the outer edge side of the annular protrusion 41, and the number of the steps 411 is set to be multiple. Specifically, in an embodiment of the present application, the number of the steps 411 is set to two, including a first-level step 411 and a second-level step 411, wherein the first-level step 411 is arranged close to the surface of the first side platform 11, wherein the step 411 surface of the first-level step 411 is used to contact the bottom surface of the planetary carrier support bearing to provide a positioning effect, and the second-level step 411 is located in the middle of the annular protrusion 41, and the second-level step 411 is used to cooperate with the inside of the planetary carrier support bearing for installation, which can enhance the firmness of the assembly of the planetary carrier structure 100 and the planetary carrier support bearing. In some other embodiments, the number of the steps 411 can be set to more than two to achieve a better assembly effect, which is not limited in the present application.

[0036] Please refer to Figure 1 to Figure 2 A accommodating space 13 is provided between the first side platform 11 and the second side platform 12, and the accommodating space 13 is used to accommodate the installation of the planetary gear. The accommodating space 13 has a bottom surface close to the second side platform 12, and the bottom of the mounting groove 111 is arranged close to the bottom surface of the accommodating space 13. It can be understood that in order to reduce the envelope size of the planetary gear structure, the mounting groove 111 is extended toward the second side platform 12 to achieve axial overlap between the boss structure 21 and the accommodating space 13. In actual situations, when the boss structure 21 and the output half shaft are assembled, their assembly positions overlap at the axial position of the planetary carrier body 1, thereby reducing the axial envelope size of the planetary gear structure.

[0037] In addition, in some embodiments, the boss structure 21 has a boss side wall along the depth extension direction of the mounting groove 111, and the surface of the boss side wall is set to an arc surface. It can be understood that when the surface of the boss side wall is set to an arc surface, the contact area is increased, making the torque transmission more stable and efficient, and also used to reduce the wear of the arc surface. In some other embodiments, the boss side wall can also be set to a plane, which simplifies the processing difficulty, facilitates actual manufacturing, and is more conducive to reducing manufacturing costs while meeting the torque transmission function.

[0038] In the embodiment of the present application, the cross-sectional width of the boss structure 21 gradually decreases along the bottom of the mounting groove 111 toward the groove opening thereof. Such a configuration can facilitate the assembly of the boss structure 21 and the output half-shaft. The number of the boss structures 21 is set to be 3 evenly distributed in the circumferential direction, which has the effect of connecting the planet carrier structure 100 and the output half-shaft to prevent the output half-shaft from axially disengaging. In some other embodiments, the number of the boss structures 21 may be greater than 3, and increasing the number of the boss structures 21 can facilitate the connection between the planet carrier structure 100 and the output half-shaft.

[0039] Please refer to Figure 1 The boss structure 21 includes a first side wall 211, a second side wall 212 and a third side wall 213 along the depth extension direction of the mounting groove 111, wherein the first side wall 211 and the third side wall 213 are arranged opposite to each other, the first side wall 211 and the third side wall 213 are connected to the groove wall of the mounting groove 111, and the angle between the first side wall 211 and the groove wall of the mounting groove 111 is α, wherein 90°<α≤120°, and the effect is best when the angle is 120°, the contact area between the first side wall 211 and the third side wall 213 is large, and the area of ​​the second side wall 212 is not too small, which is conducive to the assembly of the boss structure 21 and the output half shaft, increases the contact area, and better meets the demand for torque transmission. In an embodiment of the utility model, the first side wall 211 and the third side wall 213 are symmetrically arranged, so that the force on each side wall can be more uniform. Therefore, the angle α between the first side wall 211 and the groove wall of the installation groove 111 and the angle formed by the third side wall 213 and the groove wall of the installation groove 111 are consistent in degree. Therefore, only the angle α can be used to describe the position of the first side wall 211 and the third side wall 213. In the present application, the range of the angle α is between 90° and 120°. Within this angle range, the boss structure 21 can be easily assembled and can better withstand the effect of torsional force.

[0040] In addition, please refer to Figure 1, the connecting member 31 includes a threaded connection component 311, and the threaded connection component 311 includes a screw hole and a screw, and the screw hole is provided at the boss structure 21, and the screw hole and the screw are used to cooperate and connect the planetary carrier structure 100 and the output half shaft. In the present application document, since the boss structure 21 can be used to bear the output torque of the planetary carrier structure 100, the connecting member 31 only plays a connecting role and does not need to bear the output torque. Therefore, the constraints of the output torque size on the distribution and specifications of the connecting member 31 in the prior art can be released. In the embodiment of the present utility model, the threaded connection component 311 is mainly In order to connect the planetary carrier structure 100 and the matching parts, the distribution, quantity and specifications of the threaded connection component 311 can be selected according to actual needs, and because the threaded connection component 311 does not play the role of transmitting output torque, the design requirements for the threaded connection component 311 can be greatly reduced, thereby achieving the effect of reducing costs and increasing efficiency. In a preferred embodiment, the number of the threaded connection components 311 is 3, and setting the threaded connection structures 311 to 3 can achieve the effect of reducing costs and increasing efficiency. At the same time, the 3 threaded structures can ensure the connection between the output half shaft and the planetary carrier structure 100.

[0041] In the present application, an output half-shaft is also included, and the output half-shaft includes a connecting end, and a plurality of matching structures are provided on the connecting end. The plurality of matching structures are used to cooperate and install with a plurality of boss structures 21 provided on the planetary carrier structure 100. The planetary carrier structure 100 includes the above-mentioned planetary carrier structure 100. The specific structure of the planetary carrier structure 100 refers to the above-mentioned embodiment. Since the output half-shaft adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0042] A reduction gear comprises the planetary carrier structure 100 and an output half shaft. The specific structures of the planetary carrier structure 100 and the output half shaft refer to the above-mentioned embodiments. Since the reduction gear adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0043] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A planet carrier structure, used for assembly with an output half shaft, characterized in that: The planet carrier structure comprises: A planet carrier body, wherein the planet carrier body has a first side platform and a second side platform which are arranged opposite to each other, and a surface of the first side platform is partially recessed in a direction close to the second side platform to form a mounting groove; A torque transmission structure, comprising a plurality of boss structures, each of which is arranged at the wall of the mounting groove, and the torque transmission structure is used to cooperate with a plurality of matching structures arranged on the output half shaft to transmit torque; and The axial connection structure includes a plurality of connection members, which are located on the surface of the first side platform and arranged along the periphery of the mounting groove to axially connect the planet carrier and the output half shaft.

2. The planet carrier structure according to claim 1, characterized in that: The planet carrier structure also includes a bearing installation structure, and the bearing installation structure includes an annular protrusion arranged along the edge of the first side platform surface, and the annular protrusion is used for matching installation with the planet carrier support bearing.

3. The planet carrier structure according to claim 2, characterized in that: The outer edge side of the annular protrusion is provided with a step, and the number of the steps is set to be multiple.

4. The planet carrier structure according to claim 1, characterized in that: An accommodating space is provided between the first side platform and the second side platform, and the accommodating space is used to accommodate the installation of the planetary gear. The accommodating space has a bottom surface close to the second side platform, and the bottom of the installation groove is arranged close to the bottom surface of the accommodating space.

5. The planet carrier structure according to claim 1, characterized in that: The boss structure has a boss side wall along the depth extension direction of the installation groove, and the surface of the boss side wall is set as an arc surface.

6. The planet carrier structure according to claim 1, characterized in that: The cross-sectional width of the boss structure gradually decreases along the direction from the bottom of the mounting groove toward the groove opening; and / or, The number of the boss structures is set to 3.

7. The planet carrier structure according to claim 6, characterized in that: The boss structure includes a first side wall, a second side wall and a third side wall along the depth extension direction of the mounting groove, wherein the first side wall and the third side wall are arranged opposite to each other, the first side wall and the third side wall are connected to the mounting groove wall, and the angle between the first side wall and the mounting groove wall is α, wherein 90°<α≤120°.

8. The planet carrier structure according to claim 1, characterized in that: The connecting member includes a threaded connection component, and the threaded connection component includes a screw hole and a screw. The screw hole is arranged at the boss structure, and the screw hole and the screw are used to cooperate and connect the planet carrier structure and the output half shaft.

9. An output half shaft, characterized in that: The output half shaft includes a connecting end, and a plurality of matching structures are provided on the connecting end. The plurality of matching structures are used for matching and installing with a plurality of boss structures provided on the planetary carrier structure. The planetary carrier structure includes the planetary carrier structure according to any one of claims 1-8.

10. A deceleration device, characterized in that: It comprises the planet carrier structure as described in any one of claims 1 to 8 and the output half shaft as described in claim 9.

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