Precise heavy planetary reduction gearbox

Abstract

The utility model belongs to the technical field of machine tools, and particularly provides a precise heavy planetary reduction gearbox which comprises a first sun gear in transmission connection with a servo motor, an outer ring gear of the first sun gear is meshed with at least two first planetary gears, and the at least two first planetary gears jointly support a first planetary support in transmission connection with the first planetary gears. A second sun gear is in transmission connection with the interior of the end face of the first planet support, at least two second planet gears are meshed with an outer ring gear of the second sun gear, a second planet support in transmission connection with the second planet gears is jointly supported on the at least two second planet gears, and an output gear is arranged on the end face of the second planet support. According to the precise heavy planetary reduction gearbox, the double rows of inner gear rings are embedded in the integral alloy steel shell, the inner gear rings, the sun gear, the planetary gears and the planetary support are all positioned in the center of the integral gear shell through the centering integral gear shell, the structure is stable, and the output torque and the bending torque borne by the precise heavy planetary reduction gearbox are very large.

Description

Technical Field

[0001] This utility model mainly relates to the field of machine tool processing technology, and specifically to a precision heavy-duty planetary gearbox. Background Art

[0002] In modern manufacturing, the requirements for high precision of heavy machine tools are getting higher and higher, especially for various mining equipment and wind power generation equipment. In wind power generation equipment, gear processing, bearing processing, and various rotating support processing are no longer able to meet the high precision requirements of these parts, such as turning on a lathe, grinding on a grinding machine, and gear hobbing.

[0003] Traditional machining methods require different processes and tooling fixtures on different equipment to manufacture a single part. However, the errors of machine tools and tooling fixtures cannot guarantee the consistency and accuracy of the parts. Therefore, machine tools with multiple processes are needed to produce high-precision parts. However, to achieve multiple processes, precision heavy-duty rotary and actuator mechanisms are required to meet the requirements of rapid turning, precise indexing of gears, and rapid grinding. In traditional planetary gearboxes, the sun gear and planetary gears are movable and only fixed by an external gear ring. When subjected to large torques, the sun gear and planetary gears are prone to up-and-down movement, leading to misalignment and damage, affecting normal use. Based on this technology, a precision heavy-duty planetary gearbox is proposed. Utility Model Content

[0004] 1. The technical problem to be solved by the utility model:

[0005] This utility model provides a precision heavy-duty planetary gearbox to solve the technical problems existing in the background art.

[0006] 2. Technical Solution:

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A precision heavy-duty planetary gearbox includes a sun gear 1 that is connected to a servo motor drive. The outer ring gear of the sun gear 1 meshes with at least two planetary gears 1. Each of the at least two planetary gears 1 is supported by a planetary carrier 1 that is connected to it drive.

[0009] The planetary support 1 is internally connected to a sun gear 2, and the outer ring gear of the sun gear 2 meshes with at least two planet gears 2. The planetary support 2, which is internally connected to the at least two planet gears 2, is supported by the planetary support 2. The end face of the planetary support 2 is provided with an output gear.

[0010] A further improvement is that the end face of the planetary support is provided with internal teeth, and the gears on the internal teeth mesh with the external teeth of the sun gear.

[0011] A further improvement is that at least two planetary gears have an embedded gear ring meshing with their outer rings.

[0012] A further improvement is that at least two planetary gears have an embedded gear ring meshing with their outer rings.

[0013] A further improvement is that it also includes an integral gear housing located outside planetary support one and planetary support two.

[0014] A further improvement is that it also includes a centering integral gear housing located at the center of the integral gear housing.

[0015] A further improvement is that: the two ends of the integral toothed shell are respectively provided with flange cover one and flange cover two.

[0016] A further improvement is that the output shaft of the servo motor is connected to the sun gear one via a right-angle arc gear set.

[0017] A further improvement is that the output shaft of the servo motor is connected to the sun gear one via a belt drive.

[0018] A further improvement is that the output shaft of the servo motor is directly input into the inner hole of the sun gear.

[0019] 3. Beneficial effects:

[0020] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0021] The precision heavy-duty planetary reducer provided by this utility model is mainly used in various vertical lathes, vertical milling and turning machining centers, vertical grinding machines, gear hobbing and grinding machines, floor-type machine tools, gantry machine tools and other heavy-duty machine tools. It mainly drives the rotary table to rotate continuously without gap and to index and position without gap.

[0022] The precision heavy-duty planetary gearbox provided by this utility model adopts an integral alloy steel shell inlaid with a double-row internal gear ring. The centrally centered integral gear shell positions the internal gear ring, sun gear, planet gear and planet carrier at the center of the integral gear shell. The sun gear, planet gear and internal gear ring are all made of high-quality alloy steel carburized, and the tooth surface hardness reaches HRC50 degrees or more. All tooth profiles are helical teeth, and the gear precision reaches grade 5 or above. All gears and planet carrier adopt a double-end bearing fixed shaft structure.

[0023] The sun gear and planetary gears do not slip when rotating, thus ensuring the accuracy of the rotation indexing and the normal operation of the reducer. Since all gears are hardened gears, the output torque and bending torque are very large. When the output is 100,000 Nm, the diameter of the gearbox does not exceed 700 mm, and the indexing and positioning accuracy can reach more than 3 arcseconds.

[0024] The precision heavy-duty planetary reducer provided by this utility model has a small external size, can reduce speed by 30-60 times in one pass, and can realize the parallel connection of multiple planetary reducers to drive the rotary table. Multiple servo motors drive the planetary gear combination to rotate and output torque of more than 1 million Nm, which can push workpieces up to 1000 tons. The indexing accuracy can reach 5 arcseconds. It is the best device for driving the rotary table of new composite machine tools such as turning, milling, grinding and gear making.

[0025] The precision heavy-duty planetary reducer provided by this utility model can realize different input methods such as direct motor input, belt connection input, vertical input, and direct gear output according to installation needs, so as to meet the different equipment and different installation forms.

[0026] The precision heavy-duty planetary reducer provided by this utility model has broad application prospects, especially when applied to heavy and super heavy-duty CNC machine tools, mining equipment, or wind power generation equipment, which can generate good economic benefits. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the precision heavy-duty planetary gearbox structure provided in Example 1;

[0028] Figure 2 for Figure 1 A schematic diagram of the split state structure;

[0029] Figure 3 This is a schematic diagram of the connection structure of a planetary support;

[0030] Figure 4 This is a schematic diagram showing the connection relationship between the precision heavy-duty planetary gearbox and the servo motor provided in Example 2;

[0031] Figure 5 This is a schematic diagram illustrating another connection relationship between the precision heavy-duty planetary gearbox and the servo motor provided in Example 3.

[0032] Figure label:

[0033] 1-Servo motor; 2-Sun gear one; 3-Planet gear one; 4-Planet carrier one; 5-Sun gear two; 6-Planet gear two; 7-Planet carrier two; 8-Output gear; 9-Embedded gear ring one; 10-Embedded gear ring two; 11-Integral gear housing; 12-Centered integral gear housing; 13-Right angle arc gear set; 14-Integral output shaft planetary carrier; 15-Flange cover one; 16-Flange cover two. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] It should be noted that the structures not described in this utility model do not involve the design points and improvement directions of this utility model and all adopt existing technology. The above content is within the technical knowledge scope of the utility model owner. Since the technical content in this field is vast and too complex, the above content of this application does not necessarily constitute prior art.

[0039] Example 1, referring to Figure 1-2 This embodiment provides a precision heavy-duty planetary gearbox, which includes a sun gear 2 that is connected to a servo motor 1. The outer ring gear of the sun gear 2 meshes with at least two planet gears 3, and the at least two planet gears 3 are supported by a planetary support 4 that is connected to them in a transmission.

[0040] The planetary carrier 4 is internally connected to a sun gear 5. The outer ring of the sun gear 5 meshes with at least two planetary gears 6. The planetary carrier 7, which is internally connected to the at least two planetary gears 6, is internally supported by the planetary carrier 7. The end face of the planetary carrier 7 is provided with an output gear 8. The end face of the planetary carrier 7 is internally connected to an integral output shaft planetary carrier 14. The integral output shaft planetary carrier 14 is externally provided with an output gear 8.

[0041] In this embodiment, the sun gear, planetary gears and internal gear ring are all made of high-quality alloy steel with carburizing treatment, the tooth surface hardness reaches HRC50° or higher, all tooth profiles are helical teeth, the gear precision reaches grade 5 or higher, and all gears and planetary carriers adopt a double-end bearing fixed shaft structure.

[0042] The precision heavy-duty planetary gearbox provided by this utility model adopts an integral alloy steel shell inlaid with a double-row internal gear ring. The centrally centered integral gear shell positions the internal gear ring, sun gear, planet gear and planet carrier at the center of the integral gear shell. The sun gear, planet gear and internal gear ring are all made of high-quality alloy steel carburized, and the tooth surface hardness reaches HRC50 degrees or more. All tooth profiles are helical teeth, and the gear precision reaches grade 5 or above. All gears and planet carrier adopt a double-end bearing fixed shaft structure.

[0043] The sun gear and planetary gears do not slip when rotating, thus ensuring the accuracy of the rotation indexing and the normal operation of the reducer. Since all gears are hardened gears, the output torque and bending torque are very large. When the output is 100,000 Nm, the diameter of the gearbox does not exceed 700 mm, and the indexing and positioning accuracy can reach more than 3 arcseconds.

[0044] In a preferred embodiment, the end face of the planetary support 4 is provided with internal teeth, and the external teeth of the sun gear 5 are meshed on the internal teeth. The sun gear 5 is connected to the planetary support 4 by internal splines.

[0045] In a preferred embodiment, at least two planetary gears 3 have an embedded gear ring 9 meshing with their outer rings.

[0046] In a preferred embodiment, the outer rings of at least two planetary gears 6 mesh with an embedded gear ring 10.

[0047] This embodiment also includes an integral gear shell 11 disposed outside the planetary support 4 and the planetary support 7. The integral gear shell 11 is used to enclose the embedded gear ring 9, the embedded gear ring 10, the sun gear 2, the sun gear 5, the planetary gear 3, the planetary gear 6, the planetary support 4, and the planetary support 7.

[0048] In a preferred embodiment, the two ends of the integral gear housing are respectively provided with flange cover 15 and flange cover 2 16. The flange cover bearing is fixed in the center of the flange cover, and the flange cover presses against the embedded gear ring. The flange cover serves to install the flange, the planetary support bearing seat and the embedded gear ring cover.

[0049] This embodiment also includes a centrally centered integral gear housing 12 disposed at the center of the integral gear housing 11. The centrally centered integral gear housing 12 is used to position the embedded gear ring 19, the embedded gear ring 2 10, the sun gear 1 2, the sun gear 2 5, the planet gear 1 3, the planet gear 2 6, the planet carrier 1 4, and the planet carrier 2 7 at the center of the integral gear housing 11.

[0050] In this embodiment, the output shaft of the servo motor 1 is connected to the sun gear 2 via a right-angle arc gear set 13 (such as a helical gear ring) to achieve vertical input between the servo motor 1 and the planetary gearbox.

[0051] Example 2, refer to Figure 2 The difference between Embodiment 2 and Embodiment 1 is that the output shaft of the servo motor 1 is connected to the sun gear 2 via belt drive.

[0052] Example 3, referring to Figure 3 The difference between Embodiment 2 and Embodiment 1 is that the output shaft of the servo motor 1 is directly input into the inner hole of the sun gear 2.

[0053] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A precision heavy-duty planetary gearbox, characterized in that, The gearbox includes a sun gear 1 that is driven and connected to a servo motor. The outer ring gear of the sun gear 1 meshes with at least two planet gears 1. Each of the at least two planet gears 1 is supported by a planet carrier 1 that is driven and connected to it. The planetary support 1 is internally connected to a sun gear 2, and the outer ring gear of the sun gear 2 meshes with at least two planet gears 2. The planetary support 2, which is internally connected to the planetary support 1, is supported by the planetary support 2. The end face of the planetary support 2 is provided with an output gear. The end face of the planetary support is provided with internal teeth, and the gear on the internal teeth meshes with the external teeth of the sun gear. At least two planetary gears have an embedded gear ring meshing with their outer rings; The gearbox also includes an integral gear housing disposed outside planetary carrier one and planetary carrier two; The gearbox also includes a centering integral gear housing located at the center of the integral gear housing.

2. The precision heavy-duty planetary gearbox according to claim 1, characterized in that: The integral toothed shell is provided with flange cover one and flange cover two at its two ends, respectively.

3. The precision heavy-duty planetary gearbox according to claim 1, characterized in that: The output shaft of the servo motor is connected to the sun gear one via a right-angle arc gear set.

4. The precision heavy-duty planetary gearbox according to claim 1, characterized in that: The output shaft of the servo motor is connected to the sun gear one via belt drive.

5. The precision heavy-duty planetary gearbox according to claim 1, characterized in that: The output shaft of the servo motor is directly input into the inner hole of the sun gear.

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