Planet wheel support, speed reducer and laser radar test platform

Abstract

The utility model provides a planet wheel support, a speed reducer and a laser radar test platform, the planet wheel support comprises a shaft section part and an installation part, the installation part is connected with the shaft section part and located at one end of the shaft section part, the installation part is configured to install a planet wheel, and the installation part is connected with the shaft section part and located at the other end of the shaft section part. The mounting part comprises a containing cavity and a first end face away from the shaft section part, and the containing cavity extends from the first end face to the interior of the mounting part in the direction parallel to the axial direction of the shaft section part. The speed reducer and the laser radar test platform each comprise a planet wheel support. On the basis of the arrangement of the planet wheel support, a part of the power input component can be contained in the containing cavity, the transmission part of the power input component can be meshed with the planet wheel, and the power input component can share a section of axial size with the mounting part at least in the axial direction; when the planet wheel support is adopted and a speed reducer is formed, at least the size of the speed reducer in the axial direction can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of reducers, and in particular to a planetary gear bracket, a reducer and a laser radar test platform. Background Art

[0002] A reducer is a mechanical device used to reduce the output speed of a high-speed rotating motor or engine and increase the torque at the same time. It is used in various industrial transmission systems, such as machine tools, metallurgy, chemical industry, textile, automobile, aerospace, etc. Planetary gear reducer is a reducer with high precision, high stability and high transmission ratio. It is often used in high-precision transmission systems such as stepper motors and servo motors. With the development and popularization of intelligent operation, the application of planetary gear reducers is becoming more and more extensive.

[0003] A planetary gear reducer generally consists of a sun gear, a planetary gear, an outer gear with internal teeth, and a planetary gear bracket. The outer gear and the sun gear are concentrically arranged, and the planetary gear is connected between the outer gear and the sun gear. Through the meshing relationship between the sun gear, the planetary gear, and the outer gear, the connection relationship between the planetary gear and the planetary gear bracket, and the change of the application point of the power input, the planetary gear reducer has a variety of transmission combination modes, that is, the planetary gear reducer has a variety of power output modes. As a typical case of the above power output mode, for example, the application point of the power input is applied to the sun gear, and the outer gear remains fixed. At this time, the power of the sun gear can be transmitted to the planetary gear bracket via the planetary gear. By reasonably designing the meshing relationship between the sun gear, the planetary gear, and the outer gear, the transmission ratio on the transmission chain from the sun gear to the planetary gear bracket can be obtained, and the precise transmission of power can be achieved.

[0004] The planetary gear support in the related technology generally extends from one side of the planetary gear and converges into an axial structure at a position coaxial with the sun gear. The axial structure is located in front of the sun gear in the axial direction. At this time, the planetary gear support and the sun gear are separated in the axial direction of the sun gear, resulting in the planetary gear reducer as a whole being larger in size at least in the axial direction.

[0005] The content of the background technology section is only the information known to the inventor personally, and does not mean that the above information has entered the public domain before the application date of this disclosure, nor does it mean that it can become the prior art of the present disclosure. Utility Model Content

[0006] In view of the deficiencies in the prior art, the embodiments of this specification provide a planetary gear bracket, a reducer and a laser radar test platform, which can solve the technical problem that the existing planetary gear reducer has a large size in the axial direction.

[0007] According to the first aspect, an embodiment provides a planetary gear support, comprising:

[0008] a shaft section; and

[0009] A mounting portion connected to the shaft section and located at one end of the shaft section, wherein the mounting portion is configured to mount a planetary gear.

[0010] The mounting portion includes a receiving cavity and a first end surface away from the shaft section portion, and the receiving cavity extends from the first end surface toward the inside of the mounting portion along a direction parallel to the axial direction of the shaft section portion.

[0011] According to the planetary gear support described in the first aspect of the present specification, it includes a shaft section and a mounting portion, and the planetary gear can be mounted on the mounting portion. At the same time, based on the design of the accommodating cavity in the mounting portion, a part of the power input component can be received in the accommodating cavity, and the transmission part of the power input component can be engaged with the planetary gear, so that the power input component can at least share an axial dimension with the mounting portion in the axial direction, so that when the planetary gear support is used and a reducer is formed, the size of the reducer in the axial direction can at least be reduced.

[0012] In some embodiments, the accommodating cavity extends to a predetermined depth in the mounting portion, or the accommodating cavity passes through the mounting portion.

[0013] In some embodiments, the accommodating cavity passes through the mounting portion and extends into the shaft section.

[0014] In some embodiments, the mounting portion is perpendicular to the shaft section.

[0015] In some embodiments, the shaft section includes a first connecting portion.

[0016] In some embodiments, the mounting portion includes a plurality of mounting positions, and the plurality of mounting positions are arranged along a circumferential direction.

[0017] In some embodiments, the receiving cavity is configured to include a circular hole.

[0018] In some embodiments, the planetary gear support further includes an inlet shaft portion, the inlet shaft portion is connected to the mounting portion, the inlet shaft portion includes an inlet shaft cavity, and the inlet shaft cavity is communicated with the accommodating cavity.

[0019] According to the second aspect, an implementation provides a reducer, including a planetary gear support, a planetary gear assembly, a ring gear and an input gear assembly, the planetary gear support including a shaft section and a mounting portion, the mounting portion being connected to the shaft section and located at one end of the shaft section, the mounting portion being configured to mount the planetary gear assembly, the mounting portion including a accommodating cavity and a first end face away from the shaft section, the accommodating cavity extending from the first end face toward the interior of the mounting portion in a direction parallel to the axial direction of the shaft section, and one end of the input gear assembly extending into the accommodating cavity.

[0020] The reducer according to the second aspect of the present specification comprises a planetary gear support, a planetary gear assembly, a ring gear and an input gear assembly. The planetary gear assembly can be mounted on the mounting portion of the planetary gear support. At the same time, based on the design of the accommodating cavity in the mounting portion, one end of the input gear assembly as a power input component extends into the accommodating cavity, and the transmission portion of the input gear assembly can engage with the planetary gear assembly, so that the input gear assembly can drive the planetary gear support to rotate via the planetary gear assembly, thereby realizing the function of the reducer. In the process of realizing this function, the input gear assembly can at least share an axial dimension with the mounting portion in the axial direction, thereby realizing the purpose of at least reducing the dimension of the reducer in the axial direction.

[0021] In some embodiments, the mounting portion includes multiple mounting positions, the multiple mounting positions are arranged in a circumferential direction, the planetary gear assembly includes a planetary gear and a planetary gear assembly assembly, the planetary gear assembly assembly is installed in the mounting positions, and the planetary gear is rotatably installed on the planetary gear assembly assembly.

[0022] In some embodiments, the planetary gear assembly assembly includes a planetary gear fixing shaft and a planetary gear bearing, the planetary gear fixing shaft is connected to the mounting position, the end of the planetary gear fixing shaft away from the mounting portion includes a shoulder, and the planetary gear bearing abuts against the shoulder or the mounting portion.

[0023] In some embodiments, the planetary wheel assembly assembly further includes a bearing retaining ring, wherein the bearing retaining ring abuts against the planetary wheel bearing.

[0024] In some embodiments, the planetary gear support further includes an inlet shaft portion, the inlet shaft portion is connected to the mounting portion, the inlet shaft portion includes an inlet shaft cavity, and one end of the input gear assembly extends to the inlet shaft cavity.

[0025] In some embodiments, the shaft entry portion includes a connector and a shaft entry sleeve, one end of the connector is connected to the mounting portion, the shaft entry sleeve is connected to the other end of the connector, and the connector includes a hollow area along its circumference.

[0026] In some embodiments, the input gear assembly also includes an input gear shaft, an input gear bearing and a bearing pressure ring, the input gear bearing is sleeved at both ends of the input gear shaft, the bearing pressure ring is sleeved at one end of the input gear shaft close to the input shaft sleeve, and the bearing pressure ring is connected to the input shaft sleeve and stopped on one side of the input gear bearing.

[0027] In some embodiments, the reducer further includes a support bearing, which is sleeved on the shaft section of the planetary gear support and the shaft sleeve of the planetary gear support.

[0028] In some embodiments, the gear ring forms a limiting step on the inner side of its end, and the bracket bearing sleeved on the shaft sleeve abuts against the limiting step.

[0029] In some embodiments, a transmission gear tooth is formed on the shaft section, and the reducer also includes a second reduction structure, which is connected to the transmission gear tooth. The second reduction structure includes a second planetary gear bracket and a second planetary gear assembly, wherein the second planetary gear bracket includes a second shaft section and a second mounting portion, the second mounting portion is connected to the second shaft section and is located at one end of the second shaft section, the second mounting portion is configured to install the second planetary gear assembly, the second mounting portion includes a second accommodating cavity and a second end face away from the second shaft section, the second accommodating cavity extends from the second end face to the interior of the second mounting portion in a direction parallel to the axial direction of the second shaft section, and one end of the transmission gear tooth extends into the second accommodating cavity.

[0030] In some embodiments, the second shaft section includes a second connecting portion.

[0031] In some embodiments, the reducer further includes a sealing cover assembly, which is sleeved on the outer periphery of the second shaft section and abuts against the gear ring to seal the second reduction structure.

[0032] In some embodiments, the sealing cover assembly includes a bearing seat and a shaft sealing cover, the bearing seat abuts against the gear ring, and the bearing cover is sleeved on the outer periphery of the second shaft section and connected to the bearing seat.

[0033] In some embodiments, the sealing cover assembly further includes a sealing ring, and the sealing ring abuts against the second shaft section.

[0034] In some embodiments, the reducer further includes a second ring gear, and the second ring gear is separated from the ring gear or the second ring gear and the ring gear are an integrated structure.

[0035] According to the third aspect, an implementation provides a laser radar test platform, comprising the reducer described in the second aspect.

[0036] According to the laser radar test platform described in the third aspect of this specification, since it uses a reducer with a smaller size in the axial direction for driving, the driving part of the laser radar test platform has smaller space requirements, is easy to arrange and install, and is also convenient to use.

[0037] Other functions of the planetary gear support, reducer and laser radar test platform provided in this specification will be partially listed in the following description. The creative aspects of the planetary gear support, reducer and laser radar test platform provided in this specification can be fully explained by practicing or using the methods, devices and combinations described in the following detailed examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of this specification, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic structural diagram of a reducer example provided according to some embodiments of this specification is shown;

[0040] Figure 2 A cross-sectional view showing an example of a reducer provided according to some embodiments of the present specification;

[0041] Figure 3 A cross-sectional view showing an example of a planetary gear support and an example of a planetary gear assembly provided according to some embodiments of the present specification;

[0042] Figure 4 A schematic structural diagram of an example of a planetary gear support and an example of a planetary gear assembly provided according to some embodiments of this specification is shown;

[0043] Figure 5 A schematic structural diagram from another angle of an example of a planetary gear support and an example of a planetary gear assembly provided according to some embodiments of this specification is shown;

[0044] Figure 6 A schematic structural diagram of an example of a planetary gear support provided according to some embodiments of this specification is shown;

[0045] Figure 7 A schematic structural diagram of another angle of an example of a planetary gear support provided in some embodiments of this specification is shown;

[0046] Figure 8 A cross-sectional view showing an example of an input gear assembly provided according to some embodiments of the present specification;

[0047] Fig. 9 A schematic structural diagram of an input gear assembly example provided according to some embodiments of this specification is shown;

[0048] Fig.10 A schematic structural diagram showing another angle of an input gear assembly example provided according to some embodiments of the present specification;

[0049] Fig.11 A schematic structural diagram of an example of a bearing pressing ring provided according to some embodiments of this specification is shown;

[0050] Fig.12 A cross-sectional view showing an example of a second planetary gear support provided according to some embodiments of the present specification;

[0051] Fig.13 A schematic structural diagram of an example of a second planetary gear support provided according to some embodiments of this specification is shown;

[0052] Fig.14 A cross-sectional view showing an example of a reducer with a motor provided according to some embodiments of the present specification;

[0053] Fig.15 A schematic structural diagram of an example of a reducer with a motor provided according to some embodiments of this specification is shown;

[0054] Fig.16 A schematic diagram of the structure of an example of a motor provided according to some embodiments of the present specification is shown.

[0055] Description of main component symbols:

[0056] 10- reducer;

[0057] 20-motor; 21-motor shaft;

[0058] 100-planetary gear support; 110-shaft section; 120-installation part; 130-shaft entry; 140-support bearing; 111-first connecting part; 112-transmission gear teeth; 121-accommodating cavity; 122-first end surface; 123-third end surface; 124-installation position; 125-hollow convex column; 131-shaft entry cavity; 132-connecting piece; 133-shaft entry sleeve; 1321-empty area; 1322-connecting column;

[0059] 200-planetary gear assembly; 210-planetary gear; 220-planetary gear assembly assembly; 221-planetary gear fixing shaft; 222-planetary gear bearing; 223-bearing retaining ring; 2211-shaft shoulder; 2212-first shaft section; 2213-second shaft section; 2214-third shaft section;

[0060] 300-gear ring; 310-limiting step;

[0061] 400-input gear assembly; 410-input gear shaft; 420-input gear bearing; 430-bearing pressure ring; 431-convex rib; 401-jack;

[0062] 500-seal cover assembly; 510-bearing seat; 520-shaft seal gland; 530-seal ring; 511-outer surface; 512-inner surface; 513-side surface; 514-first abutting step; 531-first seal portion; 532-second seal portion; 533-third seal portion;

[0063] 010-second reduction structure; 011-second planetary gear bracket; 012-second planetary gear assembly; 013-second ring gear; 0111-second shaft section; 0112-second mounting portion; 0113-second bracket bearing; 0121-second planetary gear; 0122-second planetary gear assembly; 0123-second planetary gear bearing; 0131-second abutment step; 0111a-second connecting portion; 0112a-second accommodating cavity; 0112b-second end face. DETAILED DESCRIPTION

[0064] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0065] The terms used herein are only used for the purpose of describing specific example embodiments and are not restrictive. For example, unless the context clearly indicates otherwise, as used herein, the singular forms "a", "an" and "the" may also include plural forms. When used in this specification, the terms "include", "comprise" and / or "contain" mean that the associated integers, steps, operations, elements and / or components exist, but do not exclude the existence of one or more other features, integers, steps, operations, elements, components and / or groups or that other features, integers, steps, operations, elements, components and / or groups may be added in the system / method.

[0066] In the present application, "X includes at least one of A, B, or C" means that X includes at least A, or X includes at least B, or X includes at least C. That is, X may include only any combination of A, B, and C, or may include any combination of A, B, and C and other possible contents / elements at the same time. The any combination of A, B, and C may be A, B, C, AB, AC, BC, or ABC.

[0067] In this application, unless explicitly stated otherwise, the association relationship between structures can be a direct association relationship or an indirect association relationship. For example, when describing "A is connected to B", unless it is explicitly stated that A is directly connected to B, it should be understood that A can be directly connected to B or indirectly connected to B; for another example, when describing "A is above B", unless it is explicitly stated that A is directly above B (AB is adjacent and A is above B), it should be understood that A can be directly above B or indirectly above B (AB is separated by other elements and A is above B). And so on.

[0068] In view of the following description, these and other features of the present specification, as well as the operation and function of the related elements of the structure, and the economy of the combination and manufacture of the parts can be significantly improved. Reference is made to the accompanying drawings, all of which form a part of this specification. However, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0069] The LiDAR test platform is a special device for calibrating and evaluating LiDAR. It can verify the LiDAR's ranging accuracy, angular resolution, detection range and other key indicators by driving the LiDAR to rotate within a certain angle range. The driving part of the LiDAR test platform is generally equipped with a reducer, which drives the rotation of the platform to realize the rotation of the LiDAR placed on the platform.

[0070] Lidar is an ultra-precise functional component. Especially when it is used in fields such as autonomous driving, the various parameters of the Lidar must be strictly controlled within the accuracy range. Therefore, the various motion parameters of the Lidar test platform used to test the Lidar must also be strictly controlled, especially the control of the rotation angle of the Lidar test platform is particularly critical. Therefore, the reducer used in the Lidar test platform generally adopts a planetary gear reducer with higher precision and smoother movement, so that the rotation angle of the Lidar test platform is more accurate. However, the existing planetary gear reducer is generally larger in size due to the structural design, which also makes the Lidar test platform larger in size, not only occupying a larger space when in use, but also not conducive to quick installation.

[0071] Based on this, an embodiment of the present specification provides a laser radar test platform, which adopts a reducer with a smaller and more compact structure, so that the driving part of the laser radar test platform has smaller space requirements, is easy to arrange and install, and is also convenient to use.

[0072] The embodiment of this specification designs the structure of the planetary gear reducer, thereby producing a reducer that is different from the existing planetary gear reducer. The reducer is suitable for a lidar test platform and of course is also suitable for other similar occasions. As a part of a transmission system, the reducer can reduce the space occupied by the transmission system.

[0073] One of the design concepts of the reducer in the embodiment of this specification is to bring adjacent components closer together without affecting the transmission, specifically by designing an avoidance space on a certain component to provide a spatial basis for the installation of another component. Since the avoidance space is formed on the component of the reducer itself, the two components can at least share a part of the size, thereby achieving the purpose of reducing the size of the reducer. In the embodiment of this specification, the avoidance space is designed in the axial direction to achieve the reduction of the size of the reducer in the axial direction.

[0074] Figure 1 A schematic diagram of a structure of a reducer example provided according to some embodiments of this specification is shown. Figure 2 A cross-sectional view of an example of a reducer provided according to some embodiments of the present specification is shown. In some embodiments, please refer to Figure 1 and Figure 2The reducer 10 includes a planetary gear support 100, a planetary gear assembly 200, a ring gear 300 and an input gear assembly 400. The planetary gear assembly 200 is installed on the planetary gear support 100. The input gear assembly 400 transmits power to the planetary gear assembly 200. The planetary gear assembly 200 is meshed between the ring gear 300 and the input gear assembly 400, so that the planetary gear assembly 200 can drive the planetary gear support 100 to operate at a lower speed, thereby realizing the basic function of the reducer 10.

[0075] In the reducer 10, the input gear assembly 400 is located at the center axis position of the reducer 10, and the center axis of the input gear assembly 400 defines the axial direction mentioned above, and the ring gear 300, the planetary gear assembly 200 and the input gear assembly 400 are meshed in sequence in the radial direction. In the axial direction, the planetary gear support 100 is formed with the above-mentioned avoidance space, and a part of the input gear assembly 400 can be extended and installed in the avoidance space, so that the planetary gear support 100 and the input gear assembly 400 share a section of axial dimension in the axial direction, which can reduce the size of the reducer 10 in the axial direction.

[0076] Figure 3 A cross-sectional view of an example of a planetary gear support and an example of a planetary gear assembly provided according to some embodiments of the present specification is shown. Figure 4 A schematic structural diagram of an example of a planetary gear support and an example of a planetary gear assembly provided according to some embodiments of this specification is shown. Figure 5 1 shows a schematic structural diagram of another angle of a planetary gear support example and a planetary gear assembly example provided in some embodiments of this specification. Figures 3 to 5 The planetary gear support 100 includes a shaft section 110 and a mounting portion 120, the mounting portion 120 is connected to the shaft section 110 and is located at one end of the shaft section 110, and the mounting portion 120 is configured to mount a planetary gear, for example, the aforementioned planetary gear assembly 200 including the planetary gear 210 can be mounted on the mounting portion 120. The mounting portion 120 includes a receiving cavity 121 and a first end surface 122 away from the shaft section 110, and the receiving cavity 121 extends from the first end surface 122 toward the inside of the mounting portion 120 along a direction parallel to the axial direction of the shaft section 110.

[0077] It should be noted here that the mounting portion 120 is used as the mounting portion of the planetary gear, and its specific shape is generally not limited. For example, it can be a disc-shaped structure, or a flat plate-shaped structure, such as a square flat plate, a circular flat plate, etc., or some other shapes. However, it can be known that the mounting portion 120 generally has a larger format size than the shaft section 110, so that more planetary gears can be arranged on the mounting portion 120 in a manner that complies with the regulations. In addition, the shaft section 110 can be used as an output shaft, which can be designed as a regular columnar structure, such as a circular cross section, which can be a single shaft form or a stepped shaft form. Of course, in other embodiments, the shaft section 110 can also be set to a cross section of a square, polygonal or other structural form. The power transmitted by the input gear assembly 400 is decelerated and output from the shaft section 110. Of course, in some other embodiments, for example, when the reducer 10 adopts the structure including the second reduction structure below, the reducer 10 has a two-stage reduction function at this time, and the shaft section 110 can also be used as the input shaft of the next stage reduction structure. The relevant content can be seen below.

[0078] The planetary gear bracket 100 in the embodiment of the present specification includes a shaft section 110 and a mounting portion 120, and the planetary gear can be mounted on the mounting portion 120. At the same time, based on the design of the accommodating cavity 121 in the mounting portion 120, a part of the power input component (such as the input gear assembly 400 mentioned above) can be accommodated in the accommodating cavity 121, and the transmission part of the power input component (for example, the input gear shaft) can engage with the planetary gear, so that the power input component can at least share an axial dimension with the mounting portion 120 in the axial direction, so that when the planetary gear bracket 100 is used and the reducer 10 is formed, at least the size of the reducer 10 in the axial direction can be reduced.

[0079] The planetary gear bracket 100 can be manufactured in an integrated manner, such as by casting to form the planetary gear bracket 100 in one piece; the planetary gear bracket 100 can also be manufactured in parts, that is, the shaft section 110 and the mounting section 120 are manufactured separately, and then the two are connected as one through a mechanical connection process to form the planetary gear bracket 100. For the latter manufacturing method, the shaft section 110 and the mounting section 120 can be further manufactured in parts, that is, the mounting section 120 can be divided into several parts for manufacturing. In addition to the above manufacturing methods, when the planetary gear bracket 100 is manufactured in parts, it can also not be completely distinguished according to the shaft section 110 and the mounting section 120. For example, the planetary gear bracket 100 can be divided into two parts or three parts as a whole for manufacturing, and the shaft section 110 and the mounting section 120 are formed only after the multiple parts are connected as one. Therefore, it can be understood that the shaft section 110 and the mounting section 120 in the embodiment of the present invention are only two components / parts of the planetary gear bracket 100, and the two components / parts together constitute the planetary gear bracket 100. These two components / parts are only non-physical split methods adopted for the convenience of description and understanding, and do not necessarily mean that the planetary gear bracket 100 has a shaft section 110 and a mounting section 120 that can be separated or combined.

[0080] The accommodating chamber 121 is used as an avoidance space, and its main function is to accommodate a part of the power input component. Therefore, it can be understood that the axial depth of the accommodating chamber 121 should be designed according to the power input component, or according to the overall size that the reducer 10 needs to achieve. For example, in some embodiments, the accommodating chamber 121 can extend to a predetermined depth in the mounting portion 120, and the predetermined depth can improve the stability of the power input component after the power input component extends into the accommodating chamber 121. For another example, in some embodiments, the accommodating chamber 121 can pass through the mounting portion 120, that is, the depth of the accommodating chamber 121 is the same as the thickness of the mounting portion 120, thereby allowing the power input component and the mounting portion 120 to have more common size parts in the axial direction, which can further improve the assembly stability. For another example, in some embodiments, the accommodating cavity 121 may penetrate the mounting portion 120 and extend into the shaft section 110. At this time, the depth of the accommodating cavity 121 exceeds the thickness of the mounting portion 120, so that the shared dimension portion of the power input component and the mounting portion 120 in the axial direction is further increased, which can further improve the assembly stability.

[0081] In some embodiments, please refer to Figure 3 The shaft section 110 is cylindrical, the mounting portion 120 is flat, and the mounting portion 120 is perpendicular to the shaft section 110. The mounting portion 120 is perpendicular to the shaft section 110 so that the size of the planetary gear support 100 in the axial direction is further compressed. When the planetary gear support 100 is used as a component of the reducer 10, the reducer 10 has a smaller axial size.

[0082] It should be noted here that the vertical relationship between the shaft section 110 and the mounting portion 120 should be understood as follows: as a typical case, the shaft section 110 is completely in a regular cylindrical shape. At this time, it can be understood that the shaft section 110 has a regular central axis, and the mounting portion 120 is in a completely regular flat plate shape, that is, the thickness dimensions of the mounting portion 120 in all directions are consistent, and at the same time, the first end face 122 of the mounting portion 120 and the third end face 123 close to the shaft section 110 are both planes, and the central axis of the shaft section 110 is perpendicular to the plane defined by the first end face 122 or the third end face 123; in some cases, in order to improve the structural strength of the mounting portion 120, The third end face 123 of the mounting portion 120 or the portion where the mounting portion 120 is connected to the shaft section portion 110 may also be designed with some reinforcing ribs or concave-convex structures, etc. In this case, the central axis of the shaft section portion 110 is perpendicular to the plane defined by the first end face 122; in other cases, the first end face 122 and the third end face 123 of the mounting portion 120 are non-planar, but the overall shape of the mounting portion 120 is still flat. Although the first end face 122 and / or the second end face 123 may have curved surfaces, the overall shape of the mounting portion 120 can still define a vertical plane, and in this case, the central axis of the shaft section portion 110 is perpendicular to the vertical plane.

[0083] In some embodiments, please refer to Figures 2 to 5 , the shaft section 110 includes a first connection portion 111. The first connection portion 111 can be designed according to whether the shaft section 110 is used as an output shaft or an output shaft.

[0084] When the shaft section 110 is used as an output shaft, the shaft section 110 is generally connected to the load through transmission. For example, in the embodiments listed in this article, the laser radar test platform can be connected to the shaft section 110. At this time, a spline, a thread, a groove, etc. can be used as the first connection part 111 to realize the connection between the shaft section 110 and the load; when the shaft section 110 is used as an input shaft, the shaft section 110 is generally connected to the next-level transmission structure, such as the second reduction structure to be described below. At this time, the shaft section 110 acts as the input gear assembly 400, so a thread, a gear tooth, etc. can be used as the first connection part 111 to realize the connection between the shaft section 110 and the next-level transmission structure.

[0085] It should be noted that the first connection portion 111 can be integrally formed with the shaft section 110, that is, the shaft section 110 and the first connection portion 111 can be simultaneously formed by casting or the like, for example, when the first connection portion 111 adopts the aforementioned thread. Of course, the first connection portion 111 can also be manufactured separately from the shaft section 110, and then the first connection portion 111 can be installed on the shaft section 110 by a mechanical connection process or other processes.

[0086] Figure 6 A schematic structural diagram of an example of a planetary gear support provided according to some embodiments of this specification is shown; Figure 7 A schematic structural diagram of another angle of an example of a planetary gear support provided according to some embodiments of the present specification is shown.

[0087] In some embodiments, please refer to Figures 4 to 7 The mounting portion 120 includes a plurality of mounting positions 124, and the plurality of mounting positions 124 are arranged along the circumferential direction. The mounting positions 124 may be three or four, or more. At least one planetary gear may be installed on one mounting position 124, or two or more mounting positions 124 may jointly install one planetary gear, and the plurality of planetary gears are arranged along the circumferential direction on the mounting portion 120. In some embodiments, the plurality of mounting positions 124 may be arranged at equal intervals along the circumferential direction, and the plurality of planetary gears may be arranged at equal intervals along the circumferential direction on the mounting portion 120.

[0088] On the basis that the mounting portion 120 is in the form of a flat plate, the shape of the mounting portion 120 can be further optimized according to the number of mounting positions 124. For example, Figure 6 and Figure 7 In the example shown, three mounting positions 124 are designed on the mounting portion 120, and the central angle formed by each two adjacent mounting positions 124 is 120°. In order to save materials and reduce the weight of the planetary gear support 100 to reduce the transmission burden, the mounting portion 120 is designed to be a roughly triangular structure. In the embodiment where the mounting portion 120 is designed with more mounting positions 124, the mounting portion 120 can also be a quadrilateral or polygonal according to the evolution.

[0089] Optionally, the structure of the mounting portion 120 can be further simplified. In addition to ensuring that the mounting position 124 and the mounting portion 120 as a whole have sufficient strength, other parts of the mounting portion 120 can be further simplified. For example, when the mounting portion 120 is designed with four mounting positions 124, the mounting portion 120 can even be designed as a cross structure. The center position of the cross structure can be designed to be relatively thick to form the accommodating cavity 121, and the four ends of the cross structure can be used to form the mounting position 124. When the mounting portion 120 is designed with three mounting positions 124 or more mounting positions 124, other similar structural forms can also be adopted.

[0090] In some embodiments, please refer to Figure 3 and Figure 6, the accommodating chamber 121 is constructed to include a circular hole. The circular hole can be a through hole or a blind hole, etc. As mentioned above, the accommodating chamber 121 serves as an avoidance space, and its main function is to accommodate a part of the power input component. In the planetary gear reducer, the power input component can transmit power by rotation, and in the case of rotational power input, a bearing can be configured. Therefore, in order to achieve the installation of the power input component and the bearing, the accommodating chamber 121 can adopt a circular hole, or at least the part where the power input component needs to be installed adopts a circular hole. In some cases, the accommodating chamber 121 does not necessarily have to adopt a circular hole. For example, the shape of the hole included in the accommodating chamber 121 can match the contour shape of the bearing. For example, when the contour shape of the bearing adopts a square structure, the accommodating chamber 121 can be designed as a square hole.

[0091] In some embodiments, please refer to Figures 3 to 7 The planetary gear support 100 further includes an inlet shaft portion 130 , which is connected to the mounting portion 120 . The inlet shaft portion 130 includes an inlet shaft cavity 131 , which is communicated with the accommodating cavity 121 .

[0092] In order to comply with the overall concept of the embodiment of this article, that is, to reduce the axial dimension of the reducer 10, the thickness of the mounting portion 120 may be limited. Therefore, for the input gear assembly 400, in order to ensure its stability, in addition to increasing the depth of the accommodating chamber 121 (for example, using the accommodating chamber 121 mentioned above to extend into the shaft section 110), the input gear assembly 400 does not extend too deep into one end of the accommodating chamber 121. At this time, in order to improve stability, the other end of the input gear assembly 400 can also be supported by an external structure. For example, an inlet shaft portion 130 is used, and the inlet shaft portion 130 is extended from one side of the mounting portion 120. The inlet shaft cavity 131 formed by it can expand the length of the accommodating chamber 121, so that it is sufficient to support the other end of the input gear assembly 400.

[0093] It should be understood that the function of the shaft entry portion 130 is to facilitate the installation of the input gear assembly 400 and to ensure the stability of the input gear assembly 400 during operation. For this purpose, the shaft entry portion 130 only needs to be designed to facilitate the insertion of the input gear assembly 400. On the other hand, in order not to hinder the transmission between the input gear assembly 400 and the planetary gear assembly 200, the shaft entry portion 130 at least needs to leave space so that the input gear assembly 400 and the planetary gear assembly 200 can mesh.

[0094] It should be noted that the shaft entry portion 130 can adopt a variety of structural forms, which can be a split form or an integrated form, which mainly depends on the structure of the input gear assembly 400, the support method of the input gear assembly 400 and the number of planetary gear assemblies 200. In some embodiments below, the specific shape of the shaft entry portion 130 will be described in detail in combination with the above three points.

[0095] In some embodiments, please refer to Figures 3 to 5 The planetary gear assembly 200 includes a planetary gear 210 and a planetary gear assembly assembly 220 . The planetary gear assembly assembly 220 is installed at the installation position 124 , and the planetary gear 210 is rotatably installed on the planetary gear assembly assembly 220 .

[0096] It is understandable that the planetary gear assembly 200 can realize transmission by the rotation of the planetary gear 210. For example, the surface of the planetary gear 210 is formed with gear teeth, and the planetary gear 210 can mesh with the input gear assembly 400 by virtue of its gear teeth, so that the power of the input gear assembly 400 can be transmitted to the planetary gear 210, and then the planetary gear 210 can move along the circumference of the ring gear 300 under the simultaneous action of the input gear assembly 400 and the ring gear 300, and at the same time, the planetary gear 210 also realizes self-rotation at a lower speed different from the input gear assembly 400, and finally realizes the purpose of deceleration from the input gear assembly 400 to the planetary gear carrier 100.

[0097] The number of planetary gear assemblies 200 is determined according to actual needs. Generally speaking, the mounting portion 120 is provided with three or four mounting positions 124, and the planetary gear assemblies 200 can be installed on the mounting positions 124 accordingly. In combination with the above description of the mounting positions 124 on the mounting portion 120, the number of mounting positions 124 can be determined based on the number of planetary gear assemblies 200. For example, there can be at least three assembly relationships between the planetary gear assemblies 200 and the mounting positions 124 (for ease of understanding and simplified description, the following description will be based on the example of three sets of planetary gear assemblies 200 being provided on the mounting portion 120):

[0098] The first type: the number of mounting positions 124 and the number of planetary gear assemblies 200 are the same. In the first type of assembly relationship, as one case, the mounting portion 120 is provided with three mounting positions 124 along its circumference, the mounting positions 124 can be designed as holes, each mounting position 124 can be installed with a planetary gear assembly 220, and each planetary gear assembly 220 is rotatably mounted with a planetary gear 210; as another case, the mounting portion 120 is provided with three mounting positions 124 along its circumference, the mounting positions 124 can be designed as concave strips, the planetary gear assembly 220 can be designed to be filled into the strip-shaped groove, and then the planetary gear 210 can be centrally mounted on the planetary gear assembly 220.

[0099] The second type: the number of mounting positions 124 is greater than the number of planetary gear assemblies 200. In the second type of assembly relationship, the mounting positions 124 can be designed as holes, and the number of mounting positions 124 is a multiple of three, taking two times as an example. In this case, there are six mounting positions 124, and two adjacent mounting positions 124 can form an installation group, each of which can be equipped with a set of planetary gear assemblies 200, and the planetary gear assemblies 200 are straddled on the installation group.

[0100] The third type: the number of mounting positions 124 is less than the number of planetary gear assemblies 200. In the third type of assembly relationship, the mounting positions 124 can be designed as a concave strip shape, which is roughly a three-pronged structure, and a set of planetary gear assemblies 200 can be installed at the end of each strip shape.

[0101] In the above three assembly relationships, the mounting position 124 may include a hole-shaped mounting position and a strip-shaped mounting position. When a hole-shaped mounting position is adopted, the planetary gear assembly 200 and the mounting position 124 can be made to correspond one to one, that is, the first case in the above-mentioned first assembly relationship is adopted, thereby reducing the manufacturing difficulty and process cost; when a strip-shaped mounting position is adopted, such as the second case in the above-mentioned first assembly relationship or the third assembly relationship, because the strip shape can cover more areas on the mounting portion 120, after the planetary gear assembly 200 is installed on this basis, the transmission force can be more evenly distributed on the entire mounting portion 120, which is beneficial to improving the stability of the reducer 10 during operation. In the above-mentioned second assembly relationship, the method of using a greater number of mounting positions 124 than the number of planetary gear assemblies 200 can also achieve the purpose of uniform transmission force to improve stability.

[0102] The specific structure of the planetary gear assembly 220 is not limited in the embodiments of this document, and it can be set according to the installation positions 124 of different structures and the number of the installation positions 124. For the convenience of description and understanding, the following embodiments will take the first case in the first assembly relationship as an example (the installation position 124 is hole-shaped, and the planetary gear assembly 220 and the installation position 124 correspond one to one) to describe the specific structure and installation of the planetary gear assembly 200. Other structures not disclosed in the following embodiments should not deviate from the spirit and essence of this specification, and can be simply deformed according to the contents disclosed in this specification. For example, when a strip-shaped installation position 124 is used, the planetary gear assembly 220 in the planetary gear assembly 200 can also be designed to be strip-shaped, and the planetary gear 210 can be rotatably installed on the strip-shaped planetary gear assembly 220.

[0103] In the first embodiment, please refer to Figure 3The planetary gear assembly component 220 includes a planetary gear fixing shaft 221 and a planetary gear bearing 222. The planetary gear fixing shaft 221 is connected to the mounting position 124. The end of the planetary gear fixing shaft 221 away from the mounting portion 120 includes a shoulder 2211. The planetary gear bearing 222 abuts against at least one of the shoulder 2211 or the mounting portion 120.

[0104] As a hole-shaped mounting position 124, the mounting position 124 can be opened on the mounting portion 120, which can be a through hole or a blind hole. Taking the through hole as an example, the planetary gear fixing shaft 221 can be fixedly arranged in the mounting position 124, and the planetary gear 210 can be installed on the planetary gear fixing shaft 221. In order to realize the rotation connection of the planetary gear 210 and limit the planetary gear bearing 222, the shaft shoulder 2211 on the planetary gear fixing shaft 221 and the planetary gear bearing 222 abutting against the shaft shoulder 2211 can limit the planetary gear 210 to be unable to move in the axial direction away from the mounting portion 120, and the planetary gear bearing 222 can play a good supporting and protective role for the planetary gear 210.

[0105] In the second embodiment, please refer to Figure 3 and Figure 6 On the basis of the first embodiment, a hollow boss 125 is further protruded from the mounting portion 120 , and the inner hole of the hollow boss 125 together with the through hole or blind hole on the mounting portion 120 forms a hole-shaped mounting position 124 .

[0106] Compared with the aforementioned method of independently forming the mounting position 124 by the mounting portion 120, the hollow boss 125 can increase the contact area between the planetary gear fixing shaft 221 and the mounting position 124, and can improve the installation stability of the planetary gear fixing shaft 221. At the same time, the hollow boss 125 and the shaft shoulder 2211 can be restricted on both sides of the planetary gear bearing 222, so that the planetary gear 210 cannot move in the axial direction.

[0107] In the third embodiment, please refer to Figure 3 and Figure 6 On the basis of the second embodiment, the diameter of the inner hole of the hollow boss 125 is larger than the diameter of the through hole on the mounting portion 120, and the planetary gear fixing shaft 221 includes a first shaft segment 2212, a second shaft segment 2213 and a third shaft segment 2214 with different diameters. The diameter of the first shaft segment 2212 is the smallest, the diameter of the third shaft segment 2214 is the largest, and the diameter of the second shaft segment 2213 is between the first shaft segment 2212 and the third shaft segment 2214. The first shaft segment 2212 can be adapted to be installed in the through hole of the mounting portion 120, and the second shaft segment 2213 can be adapted to be installed in the inner hole of the hollow boss 125.

[0108] During installation, the first shaft segment 2212 can be completely immersed in the through hole of the mounting portion 120, a portion of the second shaft segment 2213 can be in the inner hole of the hollow boss 125, and the third shaft segment 2214 is completely exposed. At this time, a limiting interval can be formed between the third shaft segment 2214 and the end surface of the hollow boss 125, and the planetary gear bearing 222 and the planetary gear 210 can be installed on the remaining part of the second shaft segment 2213 and be limited by the limiting interval. Compared with the aforementioned second embodiment, the third embodiment can better limit the planetary gear bearing 222 and the planetary gear 210, and can prevent the planetary gear 210 from falling off or improper friction.

[0109] In the fourth embodiment, please refer to Figure 3 and Figure 6 On the basis of the first embodiment, the second embodiment or the third embodiment, the planetary wheel assembly component 220 further includes a bearing retaining ring 223 , which abuts against the planetary wheel bearing 222 .

[0110] The arrangement of the bearing retaining ring 223 can further enhance the limiting effect, and can also provide a certain degree of protection for the planetary gear bearing 222 .

[0111] Among the above four types of embodiments of the planetary gear assembly 220, they can be selected according to factors such as specific application scenarios. For example, when it is necessary to reduce the total cost of the system, the first two types of embodiments can be used, and when it is necessary to improve stability and reliability, the last two types of embodiments can be used.

[0112] In the above-described embodiments of the planetary gear support 100 and the planetary gear assembly 200, the planetary gear support 100 serves as a mounting structure of the planetary gear assembly 200 and can also serve as an output component of the reducer 10. The planetary gear support 100 can be an integral structure or a split structure, and the planetary gear assembly 200 can be mounted on the mounting position 124 of the mounting portion 120. For example, when the mounting position 124 is in the shape of a hole, the planetary gear assembly 200 can be easily mounted on the planetary gear support 100 or easily detached from the planetary gear support 100. Therefore, in the process of assembling the reducer 10, the planetary gear support 100 and the planetary gear assembly 200 can be assembled into one piece first and then the subsequent assembly process can be implemented. For example, the planetary gear assembly 200 can be assembled first, and then the planetary gear support 100 with the planetary gear assembly 200 can be assembled into the ring gear 300.

[0113] Figure 8 A cross-sectional view showing an example of an input gear assembly provided according to some embodiments of the present specification is shown. Fig. 9 shows a schematic structural diagram of an input gear assembly example provided according to some embodiments of this specification, Fig.10 FIG. 1 is a schematic diagram showing a structure of an input gear assembly according to another embodiment of the present invention. Figure 2 , Figures 8 to 10 The input gear assembly 400 includes an input gear shaft 410 and an input gear bearing 420. The input gear shaft 410 has gear teeth. The input gear shaft 410 can be connected to an external motor to receive input of external power. The input gear bearing 420 is sleeved on both ends of the input gear shaft 410 to support the input gear shaft 410.

[0114] In combination with the above, in some embodiments, the planetary gear support 100 may further include an inlet shaft portion 130, and one end of the input gear assembly 400 may extend to the inlet shaft cavity 131. The inlet shaft portion 130 is used to guide the installation of the input gear assembly 400 and to support the input gear assembly 400 to ensure stability. As an example, please refer to Figure 6 and Figure 7 The shaft entry portion 130 includes a connecting member 132 and a shaft entry sleeve 133. One end of the connecting member 132 is connected to the mounting portion 120, and the shaft entry sleeve 133 is connected to the other end of the connecting member 132. Meanwhile, the connecting member 132 includes a vacant area 1321 along its circumference.

[0115] Here, the connecting member 132 can be used as an intermediate transition component between the mounting portion 120 and the shaft entry sleeve 133, and plays the role of connecting the mounting portion 120 and the shaft entry sleeve 133. The shaft entry sleeve 133 is used to expand the depth of the accommodating cavity 121 outside the mounting portion 120, so that the input gear shaft 410 of the input gear assembly 400 can be stably installed in the accommodating cavity 121, and can be well supported by the shaft entry sleeve 133. In addition, the empty area 1321 on the connecting member 132 can be the space reserved on the shaft entry portion 130 described above. When the input gear assembly 400 is installed in the shaft entry portion 130, the gear teeth on the input gear shaft 410 of the input gear assembly 400 can be meshed with the planetary gear 210 through the empty area 1321. It should be emphasized here that the “empty area 1321 ” may be a hollow area opened on the connecting member 132 , so that the gear teeth on the input gear shaft 410 can extend from the hollow area to mesh with the planetary gear 210 .

[0116] The shaft sleeve 133 can be an external continuation of the mounting portion 120, one end of the input gear shaft 410 can be supported in the accommodating cavity 121, and the other end of the input gear shaft 410 can be supported in the shaft sleeve 133, and the input gear bearing 420 can be sleeved on both ends of the input gear shaft 410 and respectively accommodated in the accommodating cavity 121 and the shaft sleeve 133, thereby improving the stability of the input gear assembly 400. On the other hand, it should be emphasized that the structural form of the shaft sleeve 133 and the connecting member 132 can re-innovate and simplify the assembly process of the reducer 10, and achieve the purpose of inverted assembly, that is, the input gear assembly 400 can be assembled after all other components of the reducer 10 are assembled, so that when the input gear assembly 400 fails, it can be repaired and replaced in time. For example, after the planetary gear support 100 with the planetary gear assembly 200 is assembled into the gear ring 300, the shaft sleeve 133 can be exposed, and then the input gear assembly 400 can be inserted into the mounting portion 120 along the shaft sleeve 133 in sequence. The specific assembly process can be seen below.

[0117] In some embodiments, please refer to Figure 6 and Figure 7 The shaft sleeve 133 is designed to be annular in shape to match the receiving cavity 121 with a circular through hole, so that the mounting portion 120 and the shaft sleeve 133 connected by the connecting member 132 can maintain uniformity in shape. Of course, it should be understood that when the receiving cavity 121 adopts another structural form mentioned in this specification, the shaft sleeve 133 can also be changed accordingly. In addition, the structural form of the shaft sleeve 133 can also be not limited, as long as it can support and limit the input gear shaft 410.

[0118] In some embodiments, please refer to Figure 6 and Figure 7 The connecting member 132 includes three connecting columns 1322, and the three connecting columns 1322 are spaced apart from each other so that a space can be left between two adjacent connecting columns 1322 to form an empty area 1321. In other embodiments, there may be four, five, or even more connecting columns 1322, which may be determined according to the number of planetary gear assemblies 200. In this embodiment, the connecting member 132 is composed of three separate connecting columns 1322, and the cross-section of each connecting column 1322 may be designed into various shapes, such as square, circular, triangular, etc. In order to ensure the connection strength and connection reliability, the connecting column 1322 may be made of a material with higher strength, such as a metal material such as an alloy, and may be connected by welding or interference fit.

[0119] In other embodiments, the connecting member 132 may also be an integral component. For example, it may be an integral annular structure, and space only needs to be left at the position where the hollow area 1321 needs to be formed. For example, the connecting member 132 may be hollowed out after being connected to the mounting portion 120, or the hollowed-out connecting member 132 may be connected to the mounting portion 120.

[0120] Fig.11 A schematic diagram of the structure of a bearing pressure ring example provided in accordance with some embodiments of this specification is shown. Figure 2 and Fig.11 In some embodiments, the input gear assembly 400 further includes a bearing pressing ring 430, which is sleeved on one end of the input gear shaft 410 close to the shaft sleeve 133. The bearing pressing ring 430 is connected to the shaft sleeve 133 and stops on one side of the input gear bearing 420. It can be understood that in order to achieve stable transmission of the input gear shaft 410, it is necessary not only to support and limit its rotation, but also to prevent it from axial movement. The former is achieved by the input gear bearing 420, and the latter is achieved by the bearing pressing ring 430. For the latter, please refer to Figure 2 and Figure 3 When installing the input gear assembly 400 from the outside to the inside, first place an input gear bearing 420 in the accommodating cavity 121, and then sequentially pass the input gear shaft 410 through the shaft cavity 131 and extend into the accommodating cavity 121, so that the input gear bearing 420 in the accommodating cavity 121 can support and limit one end of the input gear shaft 410, and finally place another input gear bearing 420 and a bearing pressure ring 430 in the shaft sleeve 133, and the other input gear bearing 420 together with the previous input gear bearing 420 can support and limit the rotation direction of the input gear shaft 410, and the bearing pressure ring 430 limits the input gear assembly 400 from moving in the axial direction.

[0121] In some embodiments, please refer to Figure 2 and Fig.11 The shaft sleeve 133 has an internal thread, and the bearing pressing ring 430 has an external thread. The threaded cooperation between the bearing pressing ring 430 and the shaft sleeve 133 can limit the axial direction of the input gear assembly 400 to prevent axial movement.

[0122] In some specific embodiments, please refer to Fig.11 A convex rib 431 is formed on one side of the bearing pressing ring 430 , and the convex rib 431 can directly abut against one side of the input gear bearing 420 .

[0123] In some other embodiments, the bearing pressing ring 430 can also limit the axial direction of the input gear assembly 400 in other ways. For example, the bearing pressing ring 430 can be set to a structure similar to a pressing cap, which includes a pressing portion and a protruding portion. The cross-sectional area of ​​the pressing portion is larger than the cross-sectional area of ​​the protruding portion, and the protruding portion can be adapted to the shaft sleeve 133, thereby directly pressing the bearing pressing ring 430 into the shaft sleeve 133. In order to further improve reliability, a space between the pressing portion and the shaft sleeve 133 can be provided. Glue can be injected, or a mechanical seal can be performed on the outside of the pressing part; for example, the bearing pressure ring 430 can be directly designed as a one-piece cover, and the input gear bearing 420 located in the shaft sleeve 133 can be configured so that when the input gear bearing 420 is installed in the shaft sleeve 133, the surface of the input gear bearing 420 is just flush with the surface of the shaft sleeve 133. At this time, the axial limitation of the input gear assembly 400 can be achieved by installing the cover, and the locking of the cover can be achieved by means of screws and other connecting parts.

[0124] In the foregoing embodiments, the input shaft portion 130 and the input gear assembly 400 are mainly introduced in a manner that the input gear assembly 400 can be inverted, but it should be understood that when this factor is not taken into consideration, the input shaft portion 130 and the input gear assembly 400 may also have other deformations. For example, when the normal installation method is adopted, a step may be designed at one end of the input shaft sleeve 133 (when the input shaft sleeve 133 is not designed, the step may also be set at the corresponding position of the ring gear 300), and then the input gear assembly 400 and the planetary gear carrier 100 are installed in sequence.

[0125] It can be known that the input gear shaft 410 can rely on the input gear bearing 420 to achieve stable and smooth transmission, and its axial limit depends on the bearing pressure ring 430 or the step and other structures, and the power of the input gear shaft 410 can be transmitted to the planetary gear bracket 100, so the planetary gear bracket 100 also needs to be supported and limited in rotation, and also needs to be prevented from axial movement. To this end, a method similar to the input gear shaft 410 can be adopted.

[0126] Specifically, in some embodiments, please refer to Figures 2 to 4 The reducer 10 further includes a support bearing 140, which is sleeved on the shaft section 110 of the planetary gear support 100 and the shaft sleeve 133 of the planetary gear support 100. The support bearing 140 can realize the rotation support and position limiting of the planetary gear support 100. In addition, the ring gear 300 also forms a position limiting step 310 inside its end, and the support bearing 140 sleeved on the shaft sleeve 133 abuts against the position limiting step 310. Thereafter, the sealing cover assembly 500 (the specific structure can be referred to below) is installed on the shaft section 110 to realize the axial limitation of the planetary gear support 100.

[0127] In the embodiment of the reducer 10 introduced above, the overall introduction is mainly made in a single-stage transmission mode, that is, the reducer 10 as a whole is reduced in speed once from the input gear assembly 400 to the planetary gear bracket 100. The reducer 10 in the single-stage transmission mode mainly includes the planetary gear bracket 100, the planetary gear assembly 200, the ring gear 300 and the input gear assembly 400, and of course, it can also include the sealing cover assembly mentioned above. For some of the above embodiments, during assembly, the planetary gear assembly 200 can be first installed on the planetary gear bracket 100, and then the planetary gear bracket 100 with the planetary gear assembly 200 can be installed into the ring gear 300, and then the sealing cover assembly can be installed, and finally the input gear assembly 400 can be installed from the outside to the inside into the shaft sleeve 133 of the planetary gear bracket 100. This assembly method is more convenient and quick, and is conducive to subsequent maintenance and disassembly; for other embodiments in the above, the input gear assembly 400 can be first installed into the ring gear 300, and then the planetary gear bracket 100 with the planetary gear assembly 200 and the sealing cover assembly 500 can be installed in sequence. It should be noted here that the overall assembly order of the reducer 10 is not particularly limited, and different reducers 10 in different embodiments can be selected according to actual conditions.

[0128] From the foregoing, it can be known that, for the reducer 10 in a single-stage transmission mode, its structure is designed to avoid space, especially in combination with the design of the input gear bearing 420, the bracket bearing 140, the step, the bearing pressure ring 430, the bearing retaining ring 223, etc., so that the reducer 10 can be made more compact and simpler in structure, and at the same time the axial size of the reducer 10 can be reduced.

[0129] In addition to the single-stage transmission mode, the reducer 10 can also be designed as a two-stage transmission mode or a transmission mode with more stages. This type of reducer 10 can perform one or more speed reductions after completing the first stage of speed reduction. The structure and principle of this type of reducer 10 are similar to the single-stage transmission mode. Taking the two-stage transmission mode reducer as an example, the two-stage transmission mode reducer includes not only the main components of the first stage transmission mode, but also a second reduction structure 010, and of course, it can also include the sealing cover assembly mentioned above. The second reduction structure 010 is transmission-connected to the shaft section 110 on the planetary gear support 100, that is, the shaft section 110 at this time can be used as an input shaft. In order to further describe and understand the structural composition and principle of the two-stage transmission mode of the reducer 10, the following will be explained.

[0130] Fig.12 A cross-sectional view of an example of a second planetary gear support provided according to some embodiments of the present specification is shown. Fig.13FIG. 1 shows a schematic diagram of a structure of an example of a second planetary gear support provided in accordance with some embodiments of the present specification. Figure 2 , Figure 6 and Figure 12 to Figure 13 , a transmission gear tooth 112 is formed on the shaft section 110, and the second reduction structure 010 is connected to the transmission gear tooth 112. The second reduction structure 010 includes a second planetary gear support 011, a second planetary gear assembly 012 and a second ring gear 013. The second planetary gear support 011 includes a second shaft section 0111 and a second mounting portion 0112. The second mounting portion 0112 is connected to the second shaft section 0111 and is located at one end of the second shaft section 0111. The second mounting portion 0112 is configured to mount the second planetary gear assembly 012, wherein the second mounting portion 0112 includes a second accommodating cavity 0112a and a second end face 0112b away from the second shaft section 0111. The second accommodating cavity 0112a extends from the second end face 0112b toward the inside of the second mounting portion 0112 along a direction parallel to the axial direction of the second shaft section 0111, and one end of the transmission gear tooth 112 extends into the second accommodating cavity 0112a.

[0131] During operation, the shaft section 110 can mesh with the second planetary gear assembly 012 by means of its transmission gear teeth 112, so that the power of the shaft section 110 can be transmitted to the second planetary gear assembly 012, and then the second planetary gear assembly 012 can move along the circumferential direction of the second ring gear 013 under the simultaneous action of the transmission gear teeth 112 and the second ring gear 013. At the same time, the second planetary gear assembly 012 also rotates at a lower speed different from that of the shaft section 110, thereby achieving the purpose of deceleration from the shaft section 110 to the second planetary gear support 011. This is a two-stage speed reduction formed on the basis of the single-machine transmission mode.

[0132] The second planetary gear support 011, the second planetary gear assembly 012 and the second ring gear 013 can be designed roughly with reference to the planetary gear support 100, the planetary gear assembly 200 and the ring gear 300 mentioned above. Considering the smoothness of transmission, one or more of them can also have the following changes:

[0133] 1. In the secondary transmission mode, the second planetary gear support 011 is closer to the load, so the second planetary gear 0121 (such as Figure 2 The width of the second planetary gear 210 is designed to be wider than that of the planetary gear 210. Accordingly, the second planetary gear assembly 0122 for mounting the second planetary gear 210 may also be designed to be wider. Figure 2 In the example shown, the width of the second planetary gear 0121 is approximately twice that of the planetary gear 210 , and two second planetary gear bearings 0123 are arranged side by side.

[0134] 2. The second planetary gear support 011 may no longer be designed with a structure similar to the shaft entry portion 130, so the depth of the second accommodating cavity 0112a may be designed to be deeper;

[0135] 3. The second support bearing 0113 of the second planetary gear support 011 can be arranged on the second shaft section 0111 and close to the second mounting portion 0112 (such as Figure 2 As shown), unless the second planetary gear support 011 also serves as the input shaft of the next-stage transmission structure, a second support bearing 0113 can also be provided at a position of the second shaft section 0111 away from the second mounting portion 0112.

[0136] In addition, considering the power distribution and the combination and matching relationship, the size of the second planetary gear support 011, such as the diameter of the second shaft section 0111 and the thickness of the second mounting portion 0112, can be designed according to actual conditions.

[0137] In some embodiments, please refer to Figure 2 The second shaft section 0111 includes a second connection portion 0111a, and the second connection portion 0111a can be designed according to the first connection portion 111, that is, when the second shaft section 0111 is used as an output shaft, the second shaft section 0111 is generally connected to the load by transmission. For example, in the embodiments listed in this article, the laser radar test platform can be connected to the second shaft section 0111. At this time, a spline, a thread, a groove, etc. can be used as the second connection portion 0111a to realize the connection between the second shaft section 0111 and the load; when the second shaft section 0111 is used as an input shaft, the second shaft section 0111 is generally connected to the next-level transmission structure by transmission. Therefore, a thread or the like can be used as the second connection portion 0111a to realize the connection between the second shaft section 0111 and the next-level transmission structure. In addition, the second connection portion 0111a can be integrally formed with the second shaft section 0111, that is, the second shaft section 0111 and the second connection portion 0111a are simultaneously formed by casting or the like, for example, when the second connection portion 0111a adopts the aforementioned thread. Of course, the second connection portion 0111a and the second shaft section 0111 can also be manufactured separately, and then the second connection portion 0111a can be installed on the second shaft section 0111 by a mechanical connection process or other processes.

[0138] In some embodiments, the second gear ring 013 and the gear ring 300 are two independent components, which are separated from each other. Figure 2 The second gear ring 013 and the gear ring 300 are an integrated structure, which can reduce the manufacturing costs of the gear ring 300 and the second gear ring 013 and improve the coaxiality of the system.

[0139] It should be noted that the integrated structure here refers to the synchronous rotation of the gear ring 300 and the second gear ring 013, that is, the second gear ring 013 and the gear ring 300 are connected, and the inner diameter of the second gear ring 013 and the inner diameter of the gear ring 300 can be the same or different. Figure 2 In the example shown, the inner diameter of the second ring gear 013 is the same as the inner diameter of the ring gear 300 . It can even be considered that the ring gear 300 and the second ring gear 013 are in a shared relationship, and the ring gear 300 only needs to be made large enough to cover the second planetary gear assembly 012 .

[0140] In some embodiments, please refer to Figure 2 The reducer 10 in the two-stage transmission mode may include a sealing cover assembly 500 , which is sleeved on the outer periphery of the second shaft section 0111 and abuts against the second gear ring 013 , so as to seal the second reduction structure 010 .

[0141] In the two-stage transmission mode, the second shaft section 0111 serves as the output shaft. To prevent dust, foreign matter, etc. from entering the reducer 10, a protective structure needs to be provided to protect the reducer 10. The sealing cover assembly 500 serves as the protective structure.

[0142] In some embodiments, please refer to Figure 2 The sealing cover assembly 500 includes a bearing seat 510 and a shaft seal cover 520 . The bearing seat 510 abuts against the second gear ring 013 . The shaft seal cover 520 is sleeved on the outer periphery of the second shaft section 0111 and connected to the bearing seat 510 .

[0143] As mentioned above, the second support bearing 0113 of the second planetary gear support 011 is generally arranged on the second shaft section 0111 and close to the second mounting section 0112. At this time, the function of the bearing seat 510 is to limit the second support bearing 0113. One side of the bearing seat 510 abuts against the second support bearing 0113, and the other side abuts against the second ring gear 013, so that dust, foreign matter, etc. are difficult to enter the reducer 10 through the second planetary gear support 011, and then the bearing seat 510 is sealed by the shaft seal cover 520 and is sleeved on the outer periphery of the second shaft section 0111 to achieve the isolation of dust, foreign matter, etc.

[0144] The bearing seat 510 can be abutted against the second gear ring 013 in a step-matching manner, for example. Figure 2In the example shown, the bearing seat 510 has an outer surface 511, an inner surface 512 and a side surface 513. The inner surface 512 abuts against the second support bearing 0113, and the outer surface 511 is the exposed surface of the bearing seat 510. A first abutting step 514 is formed at the intersection of the inner surface 512 and the side surface 513, and a second abutting step 0131 is provided on the second gear ring 013. The cooperation between the bearing seat 510 and the second gear ring 013 can be achieved through the cooperation of the first abutting step 514 and the second abutting step 0131.

[0145] The shaft seal gland 520 can be fastened to the bearing seat 510 by means of screws and other fasteners. To ensure the appearance, the screws and the like can be sunk into the shaft seal gland 520 .

[0146] In some embodiments, please refer to Figure 2 The sealing cover assembly 500 further includes a sealing ring 530 , which abuts against the second shaft section 0111 .

[0147] After the bearing seat 510 is abutted against the second ring gear 013, the bearing seat 510 can be slightly longer than the second support bearing 0113. After the shaft seal cover 520 is installed, a space is enclosed between the shaft seal cover 520, the bearing seat 510 and the second support bearing 0113. Filling the sealing ring 530 in the space can further enhance the sealing effect and make it more difficult for dust, foreign matter, etc. to enter the reducer 10.

[0148] It can be understood that in order to improve the sealing effect of the sealing ring 530, the sealing ring 530 can be designed as a multi-circle sealing contact mode, that is, the sealing ring 530 can form a multi-layer seal with the shaft seal cover 520, the bearing seat 510 and the second bracket bearing 0113. At this time, the sealing ring 530 can be designed as a multi-layer structure.

[0149] As an example, see Figure 2 The sealing ring 530 includes a first sealing portion 531, a second sealing portion 532 and a third sealing portion 533. The first sealing portion 531 is attached to the outer wall of the bearing seat 510, the second sealing portion 532 is attached to the outer wall of the shaft seal cover 520, and the third sealing portion 533 extends from the surface of the second sealing portion 532 and abuts against the second shaft section 0111, or the third sealing portion 533 extends from the surface of the first sealing portion 531 and abuts against the second bracket bearing 0113.

[0150] It is understandable that the sealing ring 530 needs to achieve dynamic sealing performance, that is, it has excellent sealing performance even when the second shaft section 0111 rotates. Here, the first sealing portion 531 is attached to the outer wall of the bearing seat 510 and the second sealing portion 532 is attached to the outer wall of the shaft seal cover 520. This allows the sealing ring 530 to maintain a relatively stable static state under the dynamic influence of the second shaft section 0111, thereby fully exerting the sealing performance of the sealing ring 530.

[0151] The structural form of the sealing ring 530 not only has a good sealing effect, but also can design the third sealing part 533 to be in point contact or line contact with the second shaft section 0111, for example, the third sealing part 533 is designed to be a pointed structure. Based on the arrangement of the third sealing part 533, the sealing ring 530 can have better elasticity, can increase its service life, and can reduce the interference of the second shaft section 0111 on the sealing ring 530 when rotating. In order to further improve the sealing performance of the sealing ring 530, multi-layer stripes can be designed on the surfaces of the first sealing part 531, the second sealing part 532 and the third sealing part 533 to achieve the multi-layer sealing described above.

[0152] In other embodiments, the sealing cover assembly 500 may also have other structural forms. For example, it may be designed as an integrated cover-type structure so that it can cover the second shaft section 0111 and abut against the second gear ring 013. The cover may be a hemispherical structure or other structures.

[0153] Similarly, referring to the description of the single-stage transmission mode in the foregoing text, for some of the embodiments, the reducer 10 in the two-stage transmission mode can also adopt different assembly methods. For example, during assembly, the planetary gear assembly 200 can be first installed on the planetary gear support 100, and then the planetary gear support 100 with the planetary gear assembly 200 is installed in the ring gear 300, and then the second planetary gear support 011 with the second planetary gear assembly 012 is sleeved on the shaft section 110, and then the sealing cover assembly 500 is installed, and finally the input gear assembly 400 is installed from the outside to the inside into the shaft sleeve 133 of the planetary gear support 100. This assembly method is more convenient and fast, and is conducive to subsequent maintenance and disassembly; the input gear assembly 400 can also be installed in the ring gear 300 first, and then the planetary gear support 100 with the planetary gear assembly 200, the second planetary gear support 011 with the second planetary gear assembly 012 and the sealing cover assembly 500 are installed in sequence. It should be noted here that the overall assembly sequence of the reducer 10 is not particularly limited, and different reducers 10 in different embodiments can be selected according to actual conditions.

[0154] It can be understood that based on the understanding of the single-stage transmission mode and the two-stage transmission mode, technical personnel in this field should easily realize that based on the contents disclosed in this specification, a reducer 10 with a multi-stage transmission mode such as a three-stage transmission mode or a four-stage transmission mode can also be obtained.

[0155] It can be understood that, no matter it is a single-stage transmission mode or a two-stage transmission mode, the reducer 10 needs to receive external power, which is generally provided by a motor.

[0156] Fig.14 A cross-sectional view of an example of a reducer with a motor provided according to some embodiments of the present specification is shown. Fig.15 A schematic diagram of a structure of a reducer with a motor according to some embodiments of this specification is shown. Fig.16 FIG. 1 shows a schematic diagram of an exemplary structure of a motor provided in accordance with some embodiments of this specification. Figure 1 and 14 to Fig.16 The input gear assembly 400 has a socket 401 for the motor shaft 21 of the motor 20 to be inserted. The motor 20 can be directly mounted on the gear ring 300 by means of screws or other fasteners. The motor 20 and the gear ring 300 can be matched in a stepped manner (similar to the matching manner between the second gear ring 013 and the bearing seat 510 in the previous text). The motor shaft 21 can be a D-shaped shaft (with a D-shaped cross section). Accordingly, the socket 401 is also a D-shaped hole, so that the motor shaft 21 and the input gear assembly 400 can be tightly connected to prevent undesirable phenomena such as loss of step and slippage. In other embodiments, the motor shaft 21 can also be a square shaft, a polygonal shaft, etc., so that the motor shaft 21 and the socket 401 can be matched without slipping.

[0157] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be limiting. Although not explicitly stated herein, those skilled in the art will appreciate that this specification requires various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by this specification and are within the spirit and scope of the exemplary embodiments of this specification.

[0158] In addition, certain terms in this specification have been used to describe embodiments of this specification. For example, "one embodiment", "an embodiment" and / or "some embodiments" mean that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this specification. Therefore, it can be emphasized and should be understood that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics may be appropriately combined in one or more embodiments of this specification.

[0159] It should be understood that in the foregoing description of the embodiments of this specification, in order to help understand a feature and for the purpose of simplifying this specification, this specification combines various features in a single embodiment, figure or its description. However, this does not mean that the combination of these features is necessary. When reading this specification, it is entirely possible for a person skilled in the art to mark out some of the devices as separate embodiments. In other words, the embodiments in this specification can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0160] Each patent, patent application, patent application publication, and other material, such as articles, books, specifications, publications, documents, articles, etc., cited herein, except any historical prosecution documents to which it is relevant, any equivalent that may be inconsistent or conflicting with this document, or any equivalent historical prosecution documents that may have a limiting effect on the broadest scope of the claims, may be incorporated herein by reference and used for all purposes now or hereafter associated with this document. In addition, in the event of any inconsistency or conflict between the descriptions, definitions, and / or use of terms associated with any of the incorporated materials and the terminology, descriptions, definitions, and / or use associated with this document, the terminology in this document shall control.

[0161] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of this specification. Other modified embodiments are also within the scope of this specification. Therefore, the embodiments disclosed in this specification are only used as examples and not as limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in this specification to implement the applications in this specification. Therefore, the embodiments of this specification are not limited to the embodiments accurately described in the application.

Claims

1. A planetary gear support, characterized in that: include: Shaft section; as well as A mounting portion connected to the shaft section and located at one end of the shaft section, wherein the mounting portion is configured to mount a planetary gear. The mounting portion includes a receiving cavity and a first end surface away from the shaft section portion, and the receiving cavity extends from the first end surface toward the inside of the mounting portion along a direction parallel to the axial direction of the shaft section portion.

2. The planetary gear support according to claim 1, characterized in that: The accommodating cavity extends to a predetermined depth in the mounting portion, or the accommodating cavity passes through the mounting portion.

3. The planetary gear support according to claim 1, characterized in that: The accommodating cavity passes through the mounting portion and extends into the shaft section.

4. The planetary gear support according to claim 1, characterized in that: The mounting portion is perpendicular to the shaft section portion.

5. The planetary gear support according to claim 1, characterized in that: The shaft section includes a first connecting portion.

6. The planetary gear carrier according to claim 1, characterized in that: The mounting portion includes a plurality of mounting positions, and the plurality of mounting positions are arranged along a circumferential direction.

7. The planetary gear carrier according to any one of claims 1 to 6, characterized in that: The accommodating cavity is configured to include a circular hole.

8. The planetary gear carrier according to any one of claims 1 to 6, characterized in that: The planetary gear support further comprises: The shaft entry portion is connected to the mounting portion, and the shaft entry portion includes a shaft entry cavity, and the shaft entry cavity is communicated with the accommodating cavity.

9. A reducer, characterized in that: include: Planetary gear support; Planetary gear assembly; Ring gear; as well as Input gear assembly, Wherein, the planetary gear support comprises: a shaft section; and A mounting portion is connected to the shaft section and is located at one end of the shaft section, and the mounting portion is configured to mount the planetary gear assembly. The mounting portion includes a receiving cavity and a first end face away from the shaft section, the receiving cavity extends from the first end face toward the interior of the mounting portion in a direction parallel to the axial direction of the shaft section, and one end of the input gear assembly extends into the receiving cavity.

10. The reducer according to claim 9, characterized in that: The mounting portion includes a plurality of mounting positions, and the plurality of mounting positions are arranged along a circumferential direction. The planetary gear assembly includes: Planetary gears; and A planetary wheel assembly component is installed at the installation position, and the planetary wheel is rotatably installed on the planetary wheel assembly component.

11. The reducer according to claim 10, characterized in that: The planetary gear assembly comprises: A planetary gear fixing shaft connected to the mounting position, wherein one end of the planetary gear fixing shaft away from the mounting portion comprises a shaft shoulder; and A planetary gear bearing is abutted against the shaft shoulder or the mounting portion.

12. The reducer according to claim 11, characterized in that: The planetary gear assembly also includes: A bearing retaining ring is abutted against the planetary gear bearing.

13. The reducer according to claim 9, characterized in that: The planetary gear support further comprises: An input shaft portion is connected to the mounting portion, the input shaft portion includes an input shaft cavity, and one end of the input gear assembly extends to the input shaft cavity.

14. The reducer according to claim 13, characterized in that: The shaft entry portion comprises: a connecting member, one end of which is connected to the mounting portion; and Insert the shaft sleeve and connect it to the other end of the connecting piece. Wherein, the connecting member includes a hollow area along its circumference.

15. The reducer according to claim 14, characterized in that: The input gear assembly also includes: Input gear shaft; Input gear bearings are sleeved on both ends of the input gear shaft; and The bearing pressing ring is sleeved on one end of the input gear shaft close to the shaft entry sleeve. The bearing pressing ring is connected inside the shaft entry sleeve and stops at one side of the input gear bearing.

16. The reducer according to claim 14, characterized in that: The reducer also includes: The support bearing is sleeved on the shaft section of the planetary gear support and the shaft inserting sleeve of the planetary gear support.

17. The reducer according to claim 16, characterized in that: The gear ring forms a limiting step on the inner side of its end, and the bracket bearing sleeved on the shaft sleeve abuts against the limiting step.

18. The reducer according to claim 9, characterized in that: The shaft section is formed with transmission gear teeth, and the reducer further comprises: A second reduction structure, the second reduction structure is connected to the transmission gear, and the second reduction structure includes: a second planet gear carrier; and a second planetary gear assembly; Wherein, the second planetary gear support comprises: a second shaft section; and a second mounting portion connected to the second shaft section and located at one end of the second shaft section, wherein the second mounting portion is configured to mount the second planetary gear assembly; The second mounting portion includes a second accommodating cavity and a second end surface away from the second shaft section, and the second accommodating cavity extends from the second end surface toward the inside of the second mounting portion along a direction parallel to the axial direction of the second shaft section. Wherein, one end of the transmission gear tooth extends into the second accommodating cavity.

19. The reducer according to claim 18, characterized in that: The second shaft section includes a second connecting portion.

20. The reducer according to claim 18, characterized in that: The reducer also includes: A sealing cover assembly is sleeved on the outer periphery of the second shaft section and abuts against the gear ring, and is used for sealing the second reduction structure.

21. The reducer according to claim 20, characterized in that: The sealing cover assembly comprises: a bearing seat abutting against the gear ring; and A shaft seal gland is sleeved on the outer periphery of the second shaft section and connected to the bearing seat.

22. The reducer according to claim 20, characterized in that: The sealing cover assembly also includes: A sealing ring is disposed in contact with the second shaft section.

23. The reducer according to any one of claims 18 to 22, characterized in that: The reducer also includes: A second gear ring, wherein the second gear ring is separated from the gear ring or the second gear ring and the gear ring are an integrated structure.

24. A laser radar test platform, characterized in that: Comprising a reducer as claimed in any one of claims 18 to 23.

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