Integrated single-arm output planet carrier and gearbox

Abstract

The embodiment provides an integral type single-arm output planet carrier and gear box, and relates to the field of gear boxes, the integral type single-arm output planet carrier comprises a single-arm planet carrier, an output shaft, a mounting pin shaft and a supporting bearing; the single-arm planet carrier and the output shaft are arranged to be of an integrated structure, the installation pin shaft is fixed to the single-arm planet carrier, and the installation pin shaft and the output shaft are distributed on the two opposite sides of the single-arm planet carrier. The output shaft is sleeved with the supporting bearing. The output shaft is provided with an assembling blind hole, and a connecting spline is arranged on the circumferential hole wall of the assembling blind hole. The planet carrier is simple in structural design and structure, few in assembly steps, high in assembly efficiency, small in assembly error, high in assembly quality and low in machining and manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the field of gear boxes, and in particular to an integral single-arm output planetary frame and a gear box. Background Art

[0002] Planetary gearboxes are widely used in industries such as construction machinery, port machinery, and mining thickeners, often characterized by batch or small-batch production. In recent years, driven by cost pressures, installation space constraints, and sustainable development, planetary gearboxes have been required to be more compact, smaller, and lighter. A planetary gearbox contains several stages of a planetary mechanism, of which the planet carrier is a key component. Existing planetary carriers typically include double-arm carriers and single-arm carriers. Double-arm carriers consist of two panels, while single-arm carriers consist of a single panel. Using a single-arm carrier reduces the axial dimension and overall size of the entire machine.

[0003] The inventors discovered during their research that the planetary gearboxes using single-arm planet carriers in the prior art have at least the following disadvantages:

[0004] The single-arm planetary carrier and the output shaft adopt a split structure. The single-arm planetary carrier and the output shaft need to be processed before assembly. The structure is complex and the assembly steps are cumbersome, which increases the manufacturing cost and also increases the assembly error. Utility Model Content

[0005] The objectives of the present utility model include, for example, providing an integral single-arm output planetary carrier and gearbox, which can simplify the structure, simplify the assembly steps, improve the assembly efficiency, reduce the assembly error, improve the assembly quality, and reduce the processing and manufacturing costs.

[0006] The embodiment of the present utility model can be implemented as follows:

[0007] In a first aspect, the utility model provides an integral single-arm output planetary carrier, comprising:

[0008] A single-arm planetary carrier, an output shaft, a mounting pin and a support bearing; the single-arm planetary carrier and the output shaft are arranged as an integral structure, the mounting pin is fixed to the single-arm planetary carrier, and the mounting pin and the output shaft are distributed on opposite sides of the single-arm planetary carrier; the support bearing is sleeved on the outside of the output shaft; the output shaft is provided with an assembly blind hole, and a connecting spline is provided on the circumferential hole wall of the assembly blind hole.

[0009] In an optional embodiment, the assembly blind hole includes a first hole segment and a second hole segment, one end of the first hole segment is connected to one end of the second hole segment, and the first hole segment is located on the side of the second hole segment away from the single-arm planetary carrier; the connecting spline is arranged on the hole circumferential wall of the second hole segment.

[0010] Based on the above solution, after the single-arm planetary carrier is assembled within the gearbox, the first hole section is located on the outside, allowing the external actuator to be inserted into the first hole section. The smooth wall of the first hole section eliminates the need for spline docking when the external actuator is inserted into the first hole section, thus serving as a guide for the external actuator and reducing the difficulty of installation. Furthermore, after the external actuator is inserted into the first hole section, when the circumferential position of the external actuator is adjusted within the first hole section to mate with the connecting spline on the second hole section, the position of the external actuator is stable and it is not easily dislodged from the assembly blind hole, thus improving assembly efficiency.

[0011] In an optional embodiment, the single-arm planetary carrier has a first side and a second side relative to each other, the first side is provided with a boss, the output shaft is formed on the boss, the outer diameter of the output shaft is smaller than the outer diameter of the boss, so that an annular limiting surface surrounding the output shaft is formed on the end face of the boss connected to the output shaft; the inner ring of the support bearing abuts against the annular limiting surface, and there is a distance between the inner ring of the support bearing and the first side; the pin shaft is located on the second side.

[0012] Based on the above solution, the boss can limit the position of the inner ring of the supporting bearing, the inner ring is not easy to directly contact the first side of the single-arm planetary carrier, and is not easy to wear the first side. The single-arm planetary carrier has a long service life and a low failure rate.

[0013] In an optional embodiment, an annular groove is provided on the outer peripheral surface of the output shaft, and a spring retaining ring is provided in the annular groove. The spring retaining ring is used to contact the inner ring of the support bearing to limit the axial freedom of the inner ring of the support bearing in the output shaft.

[0014] Based on the above solution, the inner ring of the support bearing is limited in the axial position of the output shaft by the spring retaining ring, which has a good limiting effect. In addition, the assembly structure of the spring retaining ring and the output shaft is simple, the assembly efficiency is high, and it is also convenient to replace the spring retaining ring when it fails.

[0015] In an optional embodiment, an oil storage tank is provided on one side of the single-arm planetary carrier where the mounting pin is provided; the mounting pins are multiple in number and arranged in a ring shape, and the oil storage tank is located in the area surrounded by the multiple mounting pins.

[0016] Based on the above solution, during the operation of the gearbox, planetary gears are installed outside the mounting pin shaft through bearings. The planetary gears and the bearings on which the planetary gears are installed need to be lubricated and cooled. The design of the oil storage tank can increase the amount of lubricating oil, so that more lubricating oil can be thrown to the surrounding mounting pin shafts under the action of centrifugal force to lubricate the bearings and planetary gears, thereby improving the lubrication and cooling effects.

[0017] In an optional embodiment, an oil guide groove is further provided on one side of the single-arm planetary carrier where the mounting pin is provided, and one end of the oil guide groove is connected to the oil storage tank, and the other end extends to the mounting pin.

[0018] Based on the above solution, the oil guide groove can guide the flow of lubricating oil, so that the lubricating oil can move along the oil guide groove to the mounting pin, thereby improving the lubrication effect.

[0019] In an optional embodiment, there are multiple oil guide grooves, and the multiple oil guide grooves correspond one by one to the multiple mounting pins.

[0020] Based on the above solution, each mounting pin guides the lubricating oil to a desired position through the corresponding oil guide groove, and the lubrication effect of the bearing at each mounting pin is good.

[0021] In an optional embodiment, a lubricating oil hole is provided on the mounting pin shaft, and the lubricating oil hole includes an axial hole section and a radial hole section that are connected.

[0022] Based on the above scheme, during the operation of the gearbox, the components inside the gearbox are mainly splash lubricated. A large amount of lubricating oil is stirred to the top and falls to the corresponding components under the action of gravity. After the lubricating oil reaches the planetary gear, the lubricating oil enters the bearing where the planetary gear is installed, and further reaches the installation pin shaft, flowing in the lubricating oil hole, which can increase the lubrication area and improve the lubrication effect.

[0023] In an optional embodiment, the single-arm planet carrier and the mounting pin are configured as an integral structure.

[0024] Based on the above solution, the overall structure is compact, high in strength and long in service life.

[0025] In a second aspect, the present invention provides a gearbox, comprising:

[0026] The integral single-arm output planet carrier according to any one of the preceding embodiments.

[0027] The beneficial effects of the embodiments of the present invention include, for example:

[0028] In summary, the integrated single-arm output planetary carrier provided in this embodiment, with the single-arm planetary carrier and output shaft integrally formed, is not only compact and small in size, but also lacks interconnecting structures such as spline connections, simplifying assembly steps and improving efficiency. This omission of connecting structures reduces manufacturing and assembly errors, improves overall structural quality and strength, and results in a low failure rate, a long service life, and low maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of an integral single-arm output planet carrier according to an embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of the cooperation between the single-arm planetary carrier and the mounting pin shaft according to an embodiment of the present application.

[0032] icon:

[0033] 100-single-arm planetary carrier; 110-boss; 120-oil storage tank; 130-oil guide groove; 200-output shaft; 210-assembly blind hole; 211-first hole section; 212-second hole section; 220-connecting spline; 300-mounting pin; 400-first support bearing; 500-second support bearing; 600-third support bearing; 700-planetary gear; 800-retaining ring. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0040] In the prior art, some planetary gearboxes need to be designed to be smaller in order to be used in situations where space is limited. Currently, a common approach is to adjust the double-arm planetary carrier to a single-arm planetary carrier 100, reducing the axial dimension and the overall volume. However, the single-arm planetary carrier 100 and the output shaft 200 are designed as a split unit, that is, the single-arm planetary carrier 100 and the output shaft 200 are processed separately and then assembled. For example, the single-arm planetary carrier 100 is provided with a spline hole, and the output shaft 200 is provided with an external spline. The external spline of the output shaft 200 is inserted into the spline hole to achieve the installation of the output shaft 200 and the single-arm planetary carrier 100. As a result, the single-arm planetary carrier 100 and the output shaft 200 require more processing steps, which increases the number of assembly steps and reduces assembly efficiency. Due to the increase in processing steps, manufacturing errors increase and assembly quality decreases.

[0041] In view of this, the designer provides an integral single-arm output planetary carrier. The single-arm planetary carrier 100 and the output shaft 200 are designed as an integrated structure, which simplifies the processing and manufacturing steps, saves assembly steps, reduces assembly difficulty, improves processing quality, and prolongs service life.

[0042] Please refer to Figure 1 This embodiment provides an integral single-arm output planetary carrier, which includes a single-arm planetary carrier 100, an output shaft 200, a mounting pin 300 and a support bearing; the single-arm planetary carrier 100 and the output shaft 200 are configured as an integrated structure, the mounting pin 300 is fixed to the single-arm planetary carrier 100, and the mounting pin 300 and the output shaft 200 are distributed on opposite sides of the single-arm planetary carrier 100; the support bearing is sleeved on the outside of the output shaft 200; the output shaft 200 is provided with an assembly blind hole 210, and a connecting spline 220 is provided on the circumferential hole wall of the assembly blind hole 210.

[0043] As described above, the integrated single-arm output planet carrier provided in this embodiment works as follows:

[0044] After the torque is transmitted to the single-arm planetary carrier 100, the single-arm planetary carrier 100 rotates, driving the output shaft 200 to rotate together. The output shaft 200 can be connected to an external actuator, thereby transmitting the torque to the external actuator through the output shaft 200, driving the external actuator to move together. Since the single-arm planetary carrier 100 and the output shaft 200 are configured as an integrated structure, not only is the structure compact and small in size, but there is also no interconnecting structure such as a spline connection between the two, which simplifies the assembly steps and improves assembly efficiency. Since the connection structure is omitted, manufacturing errors are reduced, assembly errors are reduced, the processing quality of the overall structure is improved, the overall structural strength is improved, the failure rate during operation is low, the service life is long, and the maintenance cost is low.

[0045] The following embodiments illustrate the detailed structure of the integrated single-arm output planet carrier of the present application by way of examples.

[0046] In this embodiment, an optional integrated single-arm output planetary carrier includes a single-arm planetary carrier 100, an output shaft 200, multiple mounting pins 300, a first support bearing 400, and a second support bearing 500. The single-arm planetary carrier 100, the output shaft 200, and all mounting pins 300 are configured as an integrated structure, with all mounting pins 300 located on the same side of the single-arm planetary carrier 100, and all mounting pins and the output shaft 200 located on opposite sides of the single-arm planetary carrier 100. The first support bearing 400 and the second support bearing 500 are both sleeved onto the outside of the output shaft 200, with the first support bearing 400 located between the second support bearing 500 and the single-arm planetary carrier 100.

[0047] Because the single-arm planetary carrier 100, output shaft 200, and mounting pin 300 are integrated into a single structure, the overall structure is compact, high in strength, and is not easily damaged during use, resulting in a long service life. Furthermore, the manufacturing method is simple and reliable, suitable for mass production, reducing manufacturing costs, reducing assembly steps, improving assembly errors, and enhancing manufacturing quality.

[0048] It should be understood that the number of the mounting pins 300 can be, but is not limited to, five.

[0049] In this embodiment, the single-arm planetary carrier 100 optionally has a first side and a second side disposed opposite each other. The first side is provided with a boss 110, which may be a disc-shaped structure. The output shaft 200 is formed on the boss 110. The output shaft 200 and the boss 110 may be coaxially arranged, and the outer diameter of the output shaft 200 is smaller than that of the boss 110, so that the end surface of the boss 110 connecting to the output shaft 200 forms an annular limiting surface surrounding the output shaft 200. Multiple mounting pins 300 are formed on the second side and are arranged in a circular pattern.

[0050] Please refer toFigure 2 Furthermore, an oil storage tank 120 and an oil guide tank 130 are provided on the second side of the single-arm planetary carrier 100. The oil storage tank 120 is a circular tank, and the oil storage tank 120 is located in the area surrounded by multiple mounting pins 300. The oil guide tank 130 extends in the radial direction of the oil storage tank 120, one end of the oil guide tank 130 is connected to the oil storage tank 120, and the other end extends to the position of the mounting pin 300. During the operation of the gearbox, the planetary gear 700 is mounted on the outside of the mounting pin 300 through a bearing. The planetary gear 700 and the bearings on which the planetary gear 700 is mounted need to be lubricated and cooled. The design of the oil storage tank 120 can increase the amount of lubricating oil, so that more lubricating oil can be thrown to the surrounding mounting pins 300 under the action of centrifugal force to lubricate the bearings and planetary gears 700, thereby improving the lubrication and cooling effects. At the same time, the oil guide groove 130 can guide the flow of the lubricating oil, so that the lubricating oil can move along the oil guide groove 130 to the mounting pin 300, thereby improving the lubrication effect.

[0051] It should be understood that there can be multiple oil guide grooves 130, and the multiple oil guide grooves 130 correspond one by one to multiple mounting pins 300. In this way, each mounting pin 300 guides the lubricating oil to the position of the bearing through the corresponding oil guide groove 130, thereby improving the lubrication effect.

[0052] For example, in this embodiment, the number of the oil guiding grooves 130 may be five, and the five oil guiding grooves 130 are respectively matched with the five mounting pins 300 in a one-to-one correspondence.

[0053] It should be noted that the width of the oil guide groove 130 can be set to be gradual, and the width of the oil guide groove 130 gradually increases in the direction from the oil storage tank 120 to the installation pin 300. In this way, the part of the oil guide groove 130 away from the oil storage tank 120 can also flow more oil, thereby lubricating the bearing at the installation pin 300.

[0054] In this embodiment, the output shaft 200 may optionally be a cylindrical shaft. The end face of the output shaft 200 away from the single-arm planetary carrier 100 is provided with an assembly blind hole 210. The assembly blind hole 210 may be a circular stepped hole. The assembly blind hole 210 includes a coaxially arranged first hole section 211 and a second hole section 212. One end of the first hole section 211 is connected to one end of the second hole section 212. The first hole section 211 is located on the side of the second hole section 212 away from the single-arm planetary carrier 100, that is, the second hole section 212 is located close to the single-arm planetary carrier 100. Since the second hole section 212 does not penetrate the single-arm planetary carrier 100, it is not likely to affect the structural strength of the single-arm planetary carrier 100. A connecting spline 220 is machined on the circumferential wall of the second hole section 212, and the connecting spline 220 can engage with an external actuator.

[0055] It should be noted that after the single-arm planetary carrier 100 is assembled in the gearbox, the first hole section 211 is located on the outside, allowing the external actuator to be inserted into the first hole section 211. The wall of the first hole section 211 is smooth, eliminating the need for spline docking when inserting the external actuator into the first hole section 211. This serves to guide the external actuator and reduces the difficulty of installation. After the external actuator is inserted into the first hole section 211, when the circumferential position of the external actuator is adjusted within the first hole section 211 to mate with the connecting spline 220 on the second hole section 212, the position of the external actuator is stable and it is not easily dislodged from the assembly blind hole 210, thereby improving assembly efficiency.

[0056] Furthermore, the outer circumferential surface of the output shaft 200 may be provided with an annular retaining groove, within which a spring retaining ring may be disposed. The spring retaining ring is configured to contact the inner ring of the support bearing to limit the degree of freedom of the inner ring of the support bearing in the axial direction of the output shaft 200. For example, in this embodiment, the inner ring of the first support bearing 400 abuts against the annular limiting surface on one side and against a spring retaining ring on the other side, thereby limiting the axial position of the inner ring of the first support bearing 400 in the output shaft 200. The inner ring of the second support bearing 500 may be engaged with two spring retaining rings, thereby limiting the axial position of the inner ring of the second support bearing 500 in the output shaft 200.

[0057] In this embodiment, a third support bearing 600 may optionally be disposed outside the mounting pin 300. Two third support bearings 600 may be provided, and a planetary gear 700 is externally coupled to the third support bearing 600. Furthermore, a retaining ring 800 is mounted on the end of the mounting pin 300 away from the single-arm planetary carrier 100. The retaining ring 800 abuts against the inner ring of the third support bearing 600, preventing the inner ring of the third support bearing 600 from being removed from the mounting pin 300.

[0058] According to the embodiment of the present invention, an integral single-arm output planet carrier is provided. The working principle of the integral single-arm output planet carrier is as follows:

[0059] The planetary gears 700 mesh simultaneously with the sun gear and the ring gear. As the sun gear rotates, the planetary gears 700 simultaneously rotate and orbit around the sun gear's axis, driving the single-arm planetary carrier 100 and the output shaft 200 to rotate together, outputting torque through the output shaft 200. As the single-arm planetary carrier 100 rotates, some lubricating oil accumulates in the oil reservoir 120. Centrifugal force forces the oil into the oil guide groove 130 and flows to the mounting pin 300, thereby lubricating the third bearing and the planetary gears 700.

[0060] The integrated single-arm output planet carrier provided in this embodiment has at least the following advantages:

[0061] The single-arm planet carrier 100, the output shaft 200 and the mounting pin 300 are configured as an integrated structure, which is compact and small in size, and reduces the number of assembly steps, reduces the assembly difficulty and improves the assembly efficiency.

[0062] This embodiment also provides a gearbox, which includes an integral single-arm output planetary carrier and has at least the advantages of small size and high assembly efficiency.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An integral single-arm output planetary carrier, characterized in that: include: A single-arm planetary carrier (100), an output shaft (200), a mounting pin (300) and a support bearing; the single-arm planetary carrier (100) and the output shaft (200) are arranged as an integrated structure, the mounting pin (300) is fixed to the single-arm planetary carrier (100), and the mounting pin (300) and the output shaft (200) are distributed on opposite sides of the single-arm planetary carrier (100); the support bearing is sleeved on the outside of the output shaft (200); the output shaft (200) is provided with an assembly blind hole (210), and a connecting spline (220) is provided on the circumferential hole wall of the assembly blind hole (210).

2. The integrated single-arm output planetary carrier according to claim 1, characterized in that: The assembly blind hole (210) comprises a first hole section (211) and a second hole section (212), one end of the first hole section (211) is connected to one end of the second hole section (212), and the first hole section (211) is located on a side of the second hole section (212) away from the single-arm planetary carrier (100); and the connecting spline (220) is provided on a peripheral wall of the second hole section (212).

3. The integrated single-arm output planet carrier according to claim 1, characterized in that: The single-arm planet carrier (100) has a first side and a second side opposite to each other, the first side is provided with a boss (110), the output shaft (200) is formed on the boss (110), the outer diameter of the output shaft (200) is smaller than the outer diameter of the boss (110), so that an annular limiting surface surrounding the output shaft (200) is formed on the end surface of the boss (110) connected to the output shaft (200); the inner ring of the support bearing abuts against the annular limiting surface, and there is a distance between the inner ring of the support bearing and the first side; the pin is located on the second side.

4. The integrated single-arm output planetary carrier according to claim 1, characterized in that: The outer peripheral surface of the output shaft (200) is provided with an annular groove, and a spring retaining ring is provided in the annular groove. The spring retaining ring is used to contact the inner ring of the support bearing to limit the freedom of the inner ring of the support bearing in the axial direction of the output shaft (200).

5. The integrated single-arm output planet carrier according to any one of claims 1 to 4, characterized in that: An oil storage tank (120) is provided on one side of the single-arm planetary carrier (100) on which the mounting pin shaft (300) is provided; the mounting pin shafts (300) are multiple in number and arranged in a ring shape, and the oil storage tank (120) is located in an area surrounded by the multiple mounting pin shafts (300).

6. The integrated single-arm output planet carrier according to claim 5, characterized in that: An oil guide groove (130) is also provided on one side of the single-arm planetary carrier (100) where the mounting pin shaft (300) is provided. One end of the oil guide groove (130) is connected to the oil storage tank (120), and the other end extends to the mounting pin shaft (300).

7. The integrated single-arm output planet carrier according to claim 6, characterized in that: There are a plurality of the oil guide grooves (130), and the plurality of the oil guide grooves (130) correspond one-to-one to the plurality of the mounting pins (300).

8. The integrated single-arm output planet carrier according to claim 1, characterized in that: The mounting pin shaft (300) is provided with a lubricating oil hole, and the lubricating oil hole comprises an axial hole section and a radial hole section that are connected.

9. The integrated single-arm output planet carrier according to claim 1, characterized in that: The single-arm planet carrier (100) and the mounting pin shaft (300) are configured as an integrated structure.

10. A gear box, characterized in that: The gearbox comprises: The integral single-arm output planet carrier according to any one of claims 1 to 9.

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