A structural design method of a planetary carrier and a planetary carrier

Abstract

The present invention discloses a structural design method of a planetary carrier and a planetary carrier, and belongs to the technical field of planetary carriers. The structural design method of the planetary carrier comprises: establishing a structural model of an initial planetary carrier, the initial planetary carrier comprises a side plate; presetting a first limit condition and a second limit condition; according to the first limit condition, presetting a first pin shaft hole on the side plate, and according to the second limit condition, presetting a second pin shaft hole on the side plate; setting a preset opening area on the side plate, the preset opening area can include the opening positions of the first pin shaft hole and the second pin shaft hole, so that the initial planetary carrier forms a semi-finished planetary carrier. The planetary carrier is designed and manufactured by the structural design method of the planetary carrier mentioned above. The structural design method of the planetary carrier of the present invention has a simple design method, strong operability and strong applicability. The planetary carrier of the present invention has strong structural applicability, reduces repetitive labor, is convenient for archiving and preservation, is convenient for storing blanks, shortens delivery time and improves market competitiveness.

Description

Technical Field

[0001] The present invention relates to the technical field of planetary carriers, and in particular to a structural design method of a planetary carrier and a planetary carrier. Background Art

[0002] In the design of multi-stage planetary gearboxes, the same model (or the same specification) of gearboxes have multiple speed ratios. If non-standard designs are performed for each speed ratio of the gearbox, there will be a lot of repetitive work, resulting in a huge waste of manpower and resources. In addition, because different designers have different design ideas, the design results are very different. The complexity and diversity of later products and drawings have brought many difficulties to data management. The planetary carrier is one of the main components of the planetary gearbox. It is used to install the pins and bearings of the planetary gears. The planetary carrier is the part that bears the largest external torque in the mechanism. The structural design and manufacturing of the planetary carrier have a great influence on the load distribution between the planetary gears and the bearing capacity, noise and vibration of the gearbox. Summary of the invention

[0003] An object of the present invention is to provide a structural design method for a planetary carrier, which has simple design method, strong operability and strong applicability.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A structural design method for a planet carrier, comprising:

[0006] Establishing a structural model of an initial planet carrier, wherein the initial planet carrier includes side plates;

[0007] Preset a first limit condition and a second limit condition;

[0008] According to the first limit condition, a first pin shaft hole is preset on the side plate, and according to the second limit condition, a second pin shaft hole is preset on the side plate;

[0009] A preset opening area is provided on the side plate, and the preset opening area can include the opening positions of the first pin shaft hole and the second pin shaft hole, so that the initial planet carrier forms a semi-finished planet carrier.

[0010] Optionally, after the initial planetary carrier forms a semi-finished planetary carrier, it also includes calculating the opening position of the pin shaft hole on the side plate and the aperture of the pin shaft hole according to the use conditions, and opening the pin shaft hole in the preset opening area to make the semi-finished planetary carrier form a finished planetary carrier.

[0011] Optionally, the usage conditions of the finished planetary carrier include speed ratio, power and torque.

[0012] Optionally, multiple groups of usage conditions are set, and the structural strength required for the finished planetary frame corresponding to the usage conditions is calculated based on each group of usage conditions, and the usage conditions corresponding to the maximum structural strength are set as the first limit conditions, and the usage conditions corresponding to the minimum structural strength are set as the second limit conditions.

[0013] Optionally, before setting the preset opening area on the side plate, it also includes checking the structural strength of two cases where the first pin shaft hole and the second pin shaft hole are opened on the initial planetary carrier to adjust the structural model of the initial planetary carrier; or adjusting the positions of the first pin shaft hole and the second pin shaft hole.

[0014] Optionally, the preset opening area is designed by simulation software.

[0015] Another object of the present invention is to provide a planetary carrier with strong structural applicability, reducing duplication of labor, facilitating archiving and storage of blanks, shortening delivery time and improving market competitiveness.

[0016] To achieve this object, the present invention adopts the following technical solutions:

[0017] A planetary carrier is designed and manufactured by the above-mentioned planetary carrier structural design method, the planetary carrier includes a side plate, the side plate is used to connect the pin shaft, a preset opening area is provided on the side plate, a pin shaft hole is opened on the preset opening area, the pin shaft is installed on the pin shaft hole, and the pin shaft hole can adjust the opening position and opening size on the preset opening area to adjust the applicable conditions of the planetary carrier.

[0018] Optionally, the side panel includes a plurality of the preset opening areas, and each of the preset opening areas is evenly spaced.

[0019] Optionally, a boss corresponding to the preset opening area is provided on the side plate.

[0020] Optionally, the initial planet carrier comprises two side plates, and the preset opening area is arranged on at least one of the side plates.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a structural design method for a planetary carrier, which designs a preset opening area under two limit conditions, namely, a first limit condition and a second limit condition, so that the pin shaft holes under the use conditions between the first limit condition and the second limit condition all fall within the preset opening area to meet the feasibility of processing, assembly and operation. The design method is simple and has strong operability. The first limit condition and the second limit condition can be set according to common conditions, and the adjustability and applicability are strong.

[0023] A planetary carrier provided by the present invention can achieve technical requirements such as multiple speed ratios by only adjusting the position of the pin shaft hole in the preset opening area in the structure of the semi-finished planetary carrier. It adopts advanced design concepts such as modularization and standardization, has a simple design, and improves the applicability of the semi-finished planetary carrier; reduces non-standard design, reduces the archiving and storage of drawings and other materials, reduces duplication of work, and saves labor; the semi-finished planetary carrier has low requirements for blanks, and blanks made from the same mold can be used in all structures within the planning range, and the planning range is the range of use conditions between the first limit condition and the second limit condition, which is convenient for storing blanks, optimizing inventory, reducing costs and improving efficiency; it is convenient to design products according to different orders in the later stage, shortening delivery time and improving market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a planet carrier provided by a specific embodiment of the present invention;

[0025] Figure 2 is a front view of a planet carrier provided by a specific embodiment of the present invention;

[0026] Figure 3 yes Figure 2 AA section view;

[0027] Figure 4 It is a flow chart of a structural design method of a planet carrier provided in a specific embodiment of the present invention.

[0028] In the figure:

[0029] 1-side plate; 11-boss; 111-first pin hole; 112-second pin hole; 113-pin hole;

[0030] 2- Pillar. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] like Figure 1-Figure 3 As shown, the planetary carrier includes a side plate 1 and a column 2 for connecting the side plate 1. A pin hole 113 is opened on the side plate 1. A pin is installed on the pin hole 113 of the planetary carrier. The planetary gear is assembled on the planetary carrier through the pin, so that the planetary gear is meshed with the internal sun gear and the external ring gear at the same time. The structural design and manufacturing of the planetary gear have a great influence on the load distribution between each planetary gear and the bearing capacity, noise and vibration of the gear box. The opening area of ​​the pin hole 113 on the planetary carrier has a great influence on the structural strength, processing feasibility, assembly feasibility and operation feasibility of the planetary carrier.

[0035] In order to simplify the structural design of the planetary frame and facilitate the later data management, this embodiment provides a structural design method of the planetary frame, such as Figure 1-Figure 4 As shown, it includes the following steps:

[0036] S1: Establishing a structural model of an initial planet carrier, the initial planet carrier includes a side plate 1;

[0037] S2: Preset the first limit condition and the second limit condition;

[0038] S3: According to the first limit condition, a first pin shaft hole 111 is preset on the side plate 1, and according to the second limit condition, a second pin shaft hole 112 is preset on the side plate 1;

[0039] S4: a preset opening area is set on the side plate 1, and the preset opening area can include the opening areas of the first pin shaft hole 111 and the second pin shaft hole 112, so that the initial planet carrier becomes a semi-finished planet carrier.

[0040] The initial planetary carrier is the planetary carrier when the pin shaft hole 113 is not opened on the side plate 1. Take the initial planetary carrier in the gearbox of the same specification, establish the structural model of the initial planetary carrier, and design the preset opening area according to the set first limit condition and the second limit condition. Therefore, when the use condition is between the first limit condition and the second limit condition, the opening area must fall within the preset opening area. Because under the first limit condition and the second limit condition, the first pin shaft hole 111 and the second pin shaft hole 112 on the planetary carrier are both processing feasible, assembly feasible, and operation feasible, so the pin shaft hole 113 within the preset opening area can meet the processing, assembly and operation feasibility. The design method is simple and has strong operability. The first limit condition and the second limit condition can be set according to common conditions, and it has strong adjustability and applicability.

[0041] When in use, according to different technical parameter requirements, the structure of the semi-finished planetary frame only needs to adjust the position of the pin hole 113 in the preset opening area to achieve multiple speed ratios and other technical requirements. It adopts advanced design concepts such as modularization and standardization, and the design is simple, which improves the applicability of the semi-finished planetary frame; reduces non-standard design, reduces the archiving and storage of drawings and other materials, reduces duplication of work, and saves labor; the semi-finished planetary frame does not have high requirements for the blank, and the blank made by the same mold can be used in all structures within the planning range. The planning range is the range of use conditions between the first limit condition and the second limit condition, which is convenient for storing blanks, optimizing inventory, reducing costs and improving efficiency; it is convenient for later product design according to different orders, shortening delivery time and improving market competitiveness. Optionally, the use conditions of the finished planetary frame include speed ratio, power and torque.

[0042] According to the use conditions, when the pin hole 113 is adjusted between the first pin hole 111 and the second pin hole 112, for the calculation and verification of the entire planetary transmission, the center distance is adjusted and changed, the size and number of teeth of the sun gear and the planet gear are changed, and thus the speed ratio of the single-stage planetary transmission is changed; at the same time, the overall structure is fixed, the local part can be fine-tuned, and the adjustment is convenient, thus achieving the desired purpose.

[0043] Optionally, when designing the preset opening area, the outer contour of the first pin hole 111 can be designed according to the aperture of the first pin hole 111 and the opening area of ​​the first pin hole 111, and the outer contour of the second pin hole 112 can be designed according to the aperture of the second pin hole 112 and the opening area of ​​the second pin hole 112. In addition, a surplus amount can be designed according to demand and specific structural dimensions, so that the preset opening area can include the opening areas of the first pin hole 111 and the second pin hole 112.

[0044] Further optionally, after S4, the following steps are further included:

[0045] S401: Calculate the opening area and the diameter of the pin hole 113 on the side plate 1 according to the use conditions, open the pin hole 113 in the preset opening area, and transform the semi-finished planet carrier into a finished planet carrier.

[0046] Optionally, multiple groups of use conditions are set, and the structural strength required for the finished planet carrier corresponding to the use conditions is calculated according to each group of use conditions. The use condition corresponding to the maximum structural strength is set as the first limit condition, and the use condition corresponding to the minimum structural strength is set as the second limit condition. In the initial design, information on multiple customers and multiple order requirements can be collected to comprehensively plan the speed ratio range that needs to be allocated to a single stage. This speed ratio range is reasonable and feasible, so as to determine the first limit condition and the second limit condition, and then set a preset opening area, thereby increasing the scope of application of the semi-finished planet carrier.

[0047] Optionally, before setting the preset opening area on the side plate 1, the method further includes checking the structural strength of two cases in which the first pin shaft hole 111 and the second pin shaft hole 112 are opened on the initial planetary carrier to adjust the structural model of the initial planetary carrier.

[0048] After determining the first pin hole 111 and the second pin hole 112, it is necessary to simultaneously check the strength of the structure, processing, assembly, and feasibility of operation when the pin hole 113 is opened at two extreme positions on the planetary carrier. Various situations must be considered in the design. When the feasibility cannot be met, the structure of the initial planetary carrier must be adjusted, or the positions of the first pin hole 111 and the second pin hole 112 must be adjusted so that the semi-finished planetary carrier meets the feasibility requirements while taking into account structural optimization and cost reduction. In this process, it is necessary to repeat adjustments and verifications until the requirements are met. Optionally, after the pin hole 113 is opened in the preset opening area so that the semi-finished planetary carrier forms a finished planetary carrier, it is also necessary to check the structural strength of the finished planetary carrier to further improve the design precision and accuracy and prevent problems.

[0049] Optionally, the preset opening area can be designed through simulation software, and analyzed and verified through professional simulation software to improve the efficiency and accuracy of calculation and design and optimize the overall structure. Specifically, when calculating various speed ratios and other conditions between the first limit condition and the second limit condition, it is necessary to use professional calculation software to fine-tune and control the details of each group of data to obtain the final multiple groups of calculation reports to improve the design plan.

[0050] This embodiment also provides a planet carrier, such as Figure 1-Figure 3As shown, it is designed and manufactured by the structural design method of the planetary frame mentioned above, and the planetary frame includes a side plate 1, the side plate 1 is used to connect the pin shaft, and a preset opening area is set on the side plate 1, and a pin shaft hole 113 is opened on the preset opening area, and the pin shaft is installed on the pin shaft hole 113, and the pin shaft hole 113 can adjust the opening position and opening size on the preset opening area to adjust the applicable conditions of the planetary frame. When in use, according to different technical parameter requirements, only the position of the pin shaft hole 113 needs to be adjusted on the structure of the semi-finished planetary frame to achieve technical requirements such as multiple speed ratios, adopt advanced design concepts such as modularization and standardization, and the design is simple, which improves the applicability of the semi-finished planetary frame; reduces non-standard design, reduces the archiving and storage of drawings and other materials, reduces repetitive labor, and saves labor; the semi-finished planetary frame has low requirements for blanks, and the blanks made by the same mold can be used in all structures within the planning range, and the planning range is the use condition range between the first limit condition and the second limit condition, which is convenient for storing blanks, optimizing inventory, reducing costs and improving efficiency; it is convenient for product design according to different orders in the later stage, shortening delivery time and improving market competitiveness.

[0051] According to the use conditions, when the pin hole 113 is adjusted between the first pin hole 111 and the second pin hole 112, for the calculation and verification of the entire planetary transmission, the center distance is adjusted and changed, the size and number of teeth of the sun gear and the planet gear are changed, and thus the speed ratio of the single-stage planetary transmission is changed; at the same time, the overall structure is fixed, the local part can be fine-tuned, and the adjustment is convenient, thus achieving the desired purpose.

[0052] A plurality of planetary gears are mounted on the planetary frame, and the planetary gears are arranged in one-to-one correspondence with the pin shafts, and the pin shafts are arranged in one-to-one correspondence with the pin shaft holes 113 on the planetary frame. Optionally, the side plate 1 includes a plurality of preset opening areas, and each preset opening area is evenly spaced along the circumference of the side plate 1, so as to facilitate the adjustment of the center distance of each pin shaft hole 113 in subsequent use, and the evenly arranged pin shaft holes 113 make the planetary frame structure more uniformly stressed. In this embodiment, three pin shaft holes 113 are provided. Optionally, a plurality of columns 2 are also provided on the initial planetary frame, and the columns 2 are spaced apart from the preset opening areas.

[0053] Optionally, a boss 11 corresponding to the preset opening area is provided on the side panel 1 to facilitate distinguishing the preset opening area structure, and optionally, a rounded corner is provided between the boss 11 and the side panel 1. In other embodiments, a groove or the like corresponding to the preset opening area may be provided on the side panel 1, and a rounded corner may be provided between the groove and the side panel 1, without limitation.

[0054] Optionally, the initial planetary frame includes two side plates 1, and the two side plates 1 and the column 2 form an internal cavity, and the pin shaft and the planetary gear are installed in the internal cavity. Optionally, when the two side plates 1 and the column 2 are an integral structure, a preset opening area can be set on one side plate 1, and when the pin shaft hole 113 is opened on one side plate 1, the position of the pin shaft hole 113 on the other side plate 1 can be opened relatively; optionally, when the side plates 1 and the column 2 on both sides are a separate structure, it is necessary to set a preset opening area on both side plates 1, so as to open the pin shaft hole 113 respectively, and make the pin shaft holes 113 on the two side plates 1 correspond one to one, so as to improve the structural accuracy.

[0055] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A structural design method for a planet carrier, characterized in that: include: Establishing a structural model of an initial planet carrier, wherein the initial planet carrier comprises a side plate (1); Preset a first limit condition and a second limit condition; According to the first limit condition, a first pin shaft hole (111) is preset on the side plate (1), and according to the second limit condition, a second pin shaft hole (112) is preset on the side plate (1); A preset opening area is provided on the side plate (1), wherein the preset opening area can include the opening areas of the first pin shaft hole (111) and the second pin shaft hole (112), so that the initial planet carrier forms a semi-finished planet carrier; After the initial planet carrier is formed into a semi-finished planet carrier, the method further comprises: calculating the opening position of the pin shaft hole (113) on the side plate (1) and the hole diameter of the pin shaft hole (113) according to the use conditions, and opening the pin shaft hole (113) in the preset opening area, so that the semi-finished planet carrier is formed into a finished planet carrier; A plurality of groups of usage conditions are set, and the structural strength required for the finished planetary frame corresponding to the usage conditions is calculated according to each group of usage conditions, and the usage condition corresponding to the maximum structural strength is set as the first limit condition, and the usage condition corresponding to the minimum structural strength is set as the second limit condition.

2. The structural design method of a planetary carrier according to claim 1, characterized in that: The use conditions of the finished planet carrier include speed ratio, power and torque.

3. The structural design method of a planetary carrier according to any one of claims 1 to 2, characterized in that: Before setting the preset opening area on the side plate (1), the method further includes checking the structural strength of two situations in which the first pin shaft hole (111) and the second pin shaft hole (112) are opened on the initial planetary carrier to adjust the structural model of the initial planetary carrier; or adjusting the opening area of ​​the first pin shaft hole (111) and the opening area of ​​the second pin shaft hole (112).

4. The structural design method of a planetary carrier according to any one of claims 1 to 2, characterized in that: The preset opening area is designed by simulation software.

5. A planet carrier, characterized in that: The planetary carrier is designed and manufactured by the structural design method of any one of claims 1 to 4, wherein the planetary carrier comprises a side plate (1), the side plate (1) is used to connect a pin shaft, a preset opening area is provided on the side plate (1), a pin shaft hole (113) is provided on the preset opening area, the pin shaft is installed on the pin shaft hole (113), and the pin shaft hole (113) can adjust the opening position and opening size on the preset opening area to adjust the applicable conditions of the planetary carrier.

6. The planet carrier according to claim 5, characterized in that: The side plate (1) comprises a plurality of the preset opening areas, and each of the preset opening areas is evenly spaced along the circumference of the side plate (1).

7. The planet carrier according to claim 5, characterized in that: The side plate (1) is provided with a boss (11) or a groove corresponding to the preset opening area.

8. The planet carrier according to any one of claims 5 to 7, characterized in that: The initial planet carrier comprises two side plates (1), and the preset opening area is arranged on at least one of the side plates (1).

Images