Split planetary carrier structure

Abstract

Split type planet carrier structure relates to transmission structure technical field, including planet carrier and wheel shell which are butt joint arrangement, and the installation space is formed between planet carrier and wheel shell, the support section is arranged in the installation space and is fixed with planet carrier, and the pin shaft which is detachable is arranged between planet carrier and support section along the circumference direction, the device in traditional technology is solved due to planet carrier structure and application situation, commonly used planet carrier is basically cast iron and cast steel, in the casting process, because of uncertain factors, casting defects and casting stress concentration are prone to appear, reduce the strength of planet carrier, and the planet gear or rolling bearing of the existing device is cantilevered on the planet carrier, which affects the gear meshing and is not easy to assemble.

Description

Technical Field

[0001] This utility model relates to the field of transmission structure technology, specifically to a split planetary carrier structure. Background Technology

[0002] Planetary gear transmission refers to a gear transmission in which the axis of one or more gears rotates around the fixed axis of another gear. The planet gears rotate both around their own axes and around the fixed axis with the planet carrier.

[0003] The planetary carrier is a crucial component of the planetary reduction gear at the end of the tractor drive axle, responsible for outputting torque and speed. Higher torque outputs place high demands on the strength of the planetary carrier. The structural design of the planetary carrier significantly impacts the meshing load, noise, and efficiency of the upper planetary gears. A well-designed planetary carrier should possess high strength and rigidity while being easy to cast and machine, and also facilitate the installation and subsequent maintenance and disassembly of the planetary gears.

[0004] A patent with publication number CN218494167U is disclosed in the prior art. This solution includes a gear ring, planetary gears, a half shaft, a planetary gear carrier, and a positioning structure. By setting the planetary gear carrier in the middle of the gear ring, and with the planetary gear carrier body connected to the planetary shaft, three planetary gears can be quickly installed and transmitted. With the cooperation of the first spacer and the second spacer, stable support can be provided. The positioning structure is set inside the planetary gear carrier. With the cooperation of the mounting hole, the first positioning pin, and the second positioning pin, the first spacer and the second spacer can be fixed and limited. With the cooperation of the fixing hole, the fixed and limited effect is further enhanced, so that there is no relative sliding between the planetary gear carrier body, the first spacer, and the second spacer, avoiding wear of the planetary gear carrier. Thus, the planetary gear carrier body and the first and second spacers are installed synchronously, avoiding wear of the planetary gear carrier and extending the service life of the planetary gear carrier.

[0005] The shortcomings of existing technology have gradually become apparent with use, mainly in the following aspects:

[0006] First, due to the structure and application of the planetary carrier, the planetary carriers used in existing devices are mostly made of cast iron and cast steel. During the casting process, due to uncertainties, casting defects and stress concentration are prone to occur, which reduces the strength of the planetary carrier.

[0007] Second, in existing devices, the planetary gears or rolling bearings are cantilevered on the planet carrier, which affects gear meshing and makes assembly difficult.

[0008] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a split planetary carrier structure to solve the problems in traditional devices where, due to the structure and application of the planetary carrier itself, commonly used planetary carriers are made of cast iron and cast steel. During the casting process, due to uncertainties, casting defects and stress concentrations are prone to occur, reducing the strength of the planetary carrier. Additionally, existing devices have planetary gears or rolling bearings cantilevered on the planetary carrier, affecting gear meshing and making assembly difficult.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] The split planetary carrier structure includes a planetary carrier and a wheel housing that are joined together, and an installation space is formed between the planetary carrier and the wheel housing. A support section that is fixedly connected to the planetary carrier is provided in the installation space, and a detachable pin is provided around the planetary carrier and the support section in the circumferential direction.

[0012] As an optimized solution, the outer edge of the docking end of the planetary carrier is provided with a docking groove, and the end of the wheel housing is inserted into the docking groove.

[0013] As an optimized solution, a sealing ring is provided between the circumferential sidewall of the docking groove and the wheel housing.

[0014] As an optimized solution, the circumferential sidewall of the docking groove is provided with an annular groove along the circumferential direction, and the sealing ring is fitted into the annular groove.

[0015] As an optimized solution, the planetary carrier and the wheel housing are fixedly connected by a number of screws.

[0016] As an optimized solution, the planetary carrier has several fixing holes around its circumferential end, and the end of the wheel housing has a threaded groove corresponding to each fixing hole. The screw is inserted into the fixing hole, and the end of the screw is threadedly connected to the threaded groove.

[0017] As an optimized solution, the support section has a pin hole for each of the pins, and the planetary carrier has a pin groove coaxially arranged with the pin hole.

[0018] As an optimized solution, several connecting sections are fixedly connected to the support section and the planetary carrier in the circumferential direction.

[0019] As an optimized solution, the pins are arranged in three sections, and the axis of the pins is parallel to the axis of the planetary carrier.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The planetary carrier and the gear housing are set separately, which makes it easier to install the planetary gears and needle roller bearings on the planetary shaft onto the planetary carrier before assembly, and facilitates the detection of the planetary gears after installation.

[0022] The split arrangement reduces the difficulty of casting and machining the planetary carrier and wheel housing, and improves production efficiency. This split planetary carrier is not only easy to install, but also easy to disassemble for later maintenance.

[0023] The pin is supported on the upper side of the planetary carrier, which solves the problem of cantilever support of planetary gears or rolling bearings on the planetary carrier, improves gear meshing accuracy, reduces transmission noise and increases load-bearing capacity. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the planetary carrier of this utility model.

[0027] In the diagram: 1-Planetary carrier; 2-Wheel housing; 3-Sealing ring; 4-Matching groove; 5-Screw; 6-Pin shaft; 7-Pin hole; 8-Pin groove; 9-Connecting section. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0029] like Figure 1 and Figure 2 As shown, the split planetary carrier structure includes a planetary carrier 1 and a wheel housing 2 that are connected together, and an installation space is formed between the planetary carrier 1 and the wheel housing 2. A support section that is fixed to the planetary carrier 1 is provided in the installation space, and a detachable pin 6 is provided around the planetary carrier 1 and the support section in the circumferential direction.

[0030] The outer edge of the docking end of the planetary carrier 1 is provided with a docking groove 4, and the end of the wheel housing 2 is inserted into the docking groove 4.

[0031] A sealing ring 3 is provided between the circumferential sidewall of the docking groove 4 and the wheel housing 2, and the sealing performance of the wheel housing 2 and the planetary carrier 1 is ensured by the sealing ring 3.

[0032] The circumferential sidewall of the docking groove 4 is provided with an annular groove, and the sealing ring 3 is fitted into the annular groove.

[0033] The planetary carrier 1 and the wheel housing 2 are fixedly connected by several screws 5. Before assembly, this facilitates the installation of the planetary gears and needle roller bearings on the planetary shaft onto the planetary carrier 1. After installation, it is beneficial to check the condition of the planetary gears. The split arrangement reduces the difficulty of casting and machining the planetary carrier 1 and the wheel housing 2, and improves production efficiency. This split planetary carrier 1 is not only easy to install, but also easy to disassemble for later maintenance.

[0034] The planetary carrier 1 has several fixing holes around its circumferential end. The end of the wheel housing 2 has a threaded groove corresponding to each fixing hole. The screw 5 is inserted into the fixing hole, and the end of the screw 5 is threadedly connected to the threaded groove.

[0035] The support section has a pin hole 7 for each pin shaft 6, and the planetary carrier 1 has a pin groove 8 coaxial with the pin hole 7. The pin shaft 6 is supported on both sides, which solves the problem of cantilever support of planetary gears or rolling bearings on the planetary carrier 1, improves gear meshing accuracy, reduces transmission noise and improves load-bearing capacity.

[0036] Several connecting sections 9 are fixedly connected to the support section and the planetary carrier 1 along the circumference. The connecting sections 9 have an irregular shape to increase the stability of the planetary carrier 1.

[0037] There are three pins 6, and the axis of the pins 6 is parallel to the axis of the planet carrier 1.

[0038] Other structures on the planetary carrier 1 and the wheel housing 2 are well known to those skilled in the art, so they will not be described in detail here.

[0039] The working principle of this device is as follows:

[0040] The planetary carrier 1 and the wheel housing 2 are set separately, which facilitates the installation of the planetary gears and needle roller bearings on the planetary shaft on the planetary carrier 1 before assembly, and facilitates the detection of the condition of the planetary gears after installation.

[0041] The split arrangement reduces the difficulty of casting and machining the planetary carrier 1 and the wheel housing 2, and improves production efficiency. This split planetary carrier 1 is not only easy to install, but also easy to disassemble and facilitates later maintenance.

[0042] The pin 6 is supported on the upper side of the planetary carrier 1, which solves the problem of cantilever support of planetary gears or rolling bearings on the planetary carrier 1, improves gear meshing accuracy, reduces transmission noise and increases load-bearing capacity.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A split-type planetary carrier structure, characterized in that: It includes a planetary carrier (1) and a wheel housing (2) that are connected together, and an installation space is formed between the planetary carrier (1) and the wheel housing (2). The installation space is provided with a support section that is fixed to the planetary carrier (1). A detachable pin (6) is provided around the planetary carrier (1) and the support section in the circumferential direction.

2. The split planetary carrier structure according to claim 1, characterized in that: The planetary carrier (1) has a docking groove (4) on the outer edge of the docking end, and the end of the wheel housing (2) is inserted into the docking groove (4).

3. The split planetary carrier structure according to claim 2, characterized in that: A sealing ring (3) is provided between the circumferential sidewall of the docking groove (4) and the wheel housing (2).

4. The split planetary carrier structure according to claim 3, characterized in that: The circumferential sidewall of the docking groove (4) is provided with an annular groove along the circumferential direction, and the sealing ring (3) is fitted into the annular groove.

5. The split planetary carrier structure according to claim 1, characterized in that: The planetary carrier (1) and the wheel housing (2) are fixedly connected by a number of screws (5).

6. The split planetary carrier structure according to claim 5, characterized in that: The planetary carrier (1) has several fixing holes around its circumferential end. The end of the wheel housing (2) has a threaded groove corresponding to each fixing hole. The screw (5) is inserted into the fixing hole, and the end of the screw (5) is threadedly connected to the threaded groove.

7. The split planetary carrier structure according to claim 1, characterized in that: The support section has a pin hole (7) for each of the pins (6), and the planetary carrier (1) has a pin groove (8) coaxially arranged with the pin hole (7).

8. The split planetary carrier structure according to claim 1, characterized in that: Several connecting sections (9) are fixedly connected to the support section and the planetary carrier (1) along the circumference.

9. The split planetary carrier structure according to claim 1, characterized in that: The pins (6) are arranged in three groups, and the axis of the pins (6) is parallel to the axis of the planet carrier (1).

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