Speed reducing mechanism of planetary gearbox

Abstract

The utility model relates to the technical field of reduction gearboxes, and provides a reduction mechanism of a planetary gearbox, in the aspect of large torque output, an inner gear ring made of structural steel ensures high strength, sectional design is convenient to manufacture and ensures meshing precision, a three-stage reduction structure further enhances torque lifting capacity, and the transmission efficiency is improved. According to the technical scheme of the utility model, equipment can stably operate on opponent parts in heavy-load scenes such as heavy machinery, and the shell made of the aluminum alloy material is beneficial to die casting and has various mounting characteristics such as a thread structure and a hole characteristic, so that rapid and accurate assembly with a motor and other parts is greatly facilitated, and the system integration efficiency is remarkably improved; in manufacturing, the process difficulty and cost are reduced through inner gear ring segmentation and shell die casting, during maintenance, the inner gear ring can be replaced in a segmented mode, the shell is easy to machine and modify, cost and time are effectively saved, the overall structure is compact and reasonable, operation is stable and reliable, vibration noise is reduced, the service life is prolonged, and the requirement for large-torque output is met. And meanwhile, a convenient mounting characteristic can be provided for opponent parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reduction gearbox technical field especially relates to a planetary gear box reduction mechanism. BACKGROUND

[0002] In many fields of modern industry, planetary gear box reduction mechanism plays a vital role. With the continuous development of technology, the requirements of mechanical equipment for power transmission are increasingly stringent, especially in some application scenarios that require high torque output, such as heavy machinery, engineering machinery, industrial automation production lines, etc. The traditional planetary gear box reduction mechanism gradually exposes its limitations.

[0003] The conventional planetary gear ring reduction mechanism is mostly made of powder metal, and the inner gear ring and the shell are integrally formed by pressure casting. The inner gear ring shell not only provides torque transmission but also provides installation features for the counterpart. However, in the case of high torque output, the strength of the powder metal is insufficient, and the inner gear ring teeth can easily collapse, causing the gear box reduction mechanism to fail. It is a problem to be solved that the planetary gear box reduction mechanism meets the requirements of high torque output while providing convenient installation features for the counterpart. Therefore, a planetary gear box reduction mechanism is proposed. SUMMARY

[0004] To solve the above problems, the utility model provides a planetary gear box reduction mechanism to more accurately solve the above-mentioned problem of meeting the requirements of high torque output while providing convenient installation features for the counterpart.

[0005] The utility model is realized by the following technical schemes:

[0006] The utility model provides a planetary gear box reduction mechanism, which comprises a first-stage reduction, a second-stage reduction and a third-stage reduction. The reduction mechanism comprises a shell, an inner gear ring, first planetary teeth, a first planetary carrier, second planetary teeth and a second planetary carrier. The inner gear ring is designed in sections and has a convex tooth feature on the outer diameter. The shell has a groove inside that cooperates with the convex teeth of the inner gear ring. The shell has an assembly thread structure and a threaded hole feature. The first-stage reduction comprises the inner gear ring, the first planetary teeth, a pin shaft and the first planetary carrier. The first planetary teeth are installed on the first planetary carrier through the pin shaft, and the first planetary teeth mesh with the inner gear ring.

[0007] Further, the first planetary carrier has a planetary tooth feature, and the central axis coincides with the central axis of the planetary gear box reduction mechanism.

[0008] Further, the inner gear ring is fixed in the shell and is radially positioned by the cooperation of the groove of the shell and the convex teeth of the inner gear ring. The shell is fixedly connected to the outside, and the position of the inner gear ring is relatively fixed during the entire working process.

[0009] Further, the second stage reduction comprises an inner ring, first planet gears, pins and a first planet carrier, the inner ring is shared by the first stage reduction, the first planet carrier is the same component, and the first planet gears are different individuals but the same specification.

[0010] Further, the first planet gears are installed on the first planet carrier through the pins and mesh with the inner ring, and the connection relationship and relative position are consistent with those in the first stage reduction.

[0011] Further, the third stage reduction comprises an inner ring, second planet gears, pins and a second planet carrier, the second planet gears are installed on the second planet carrier through the pins and mesh with the inner ring.

[0012] Further, the assembly of the second planet carrier and the second planet gears is adapted to the overall layout in the previous two stages of reduction.

[0013] Further, the second planet carrier is installed with an output shaft through interference fit, and the axis of the output shaft coincides with the rotation axis of the second planet carrier.

[0014] Further, the adjacent inner rings and the inner ring and the second planet carrier are respectively provided with spacers.

[0015] The utility model discloses the beneficial effects of:

[0016] 1. In the large torque output aspect, the inner ring of structural steel material ensures high strength, and the segmented design is convenient for manufacturing and guarantees meshing precision, and the three-stage reduction structure further enhances the torque lifting capacity, so that the equipment can stably run in heavy machinery and other heavy load scenes.

[0017] 2. In manufacturing, the segmented inner ring and the shell die casting reduce the process difficulty and cost, when maintaining, the inner ring can be replaced in sections, the shell is easy to process and modify, effectively saving cost and time, the overall structure is compact and reasonable, runs stably and reliably, reduces vibration noise, prolongs service life, can improve the overall performance of the equipment in the industrial field, enhances market competitiveness, and provides strong support for the efficient and stable development of related industries. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an explosion view of the main structure of the planetary gear box reduction mechanism of the utility model;

[0019] Figure 2 It is a shell structure schematic view of the planetary gear box reduction mechanism of the utility model;

[0020] Figure 3The utility model discloses a planetary gear box reduction mechanism second planet carrier structure schematic diagram.

[0021] The signs are as follows:

[0022] 10, shell; 11, inner gear ring; 12, gasket; 13, first planet gear; 14, pin shaft; 15, first planet carrier; 16, second planet gear; 17, second planet carrier; 18, output shaft. Specific implementation

[0023] In order to more clearly and completely illustrate the technical scheme of the utility model, the utility model will be further explained below in combination with the drawings.

[0024] Please refer to Figure 1 - Figure 3 The utility model provides a kind of planetary gear box reduction mechanism, when using, first check the various components of planetary gear box reduction mechanism, ensure that inner gear ring 11, first planet gear 13, second planet gear 16, pin shaft 14, first planet carrier 15, second planet carrier 17, gasket 12 and output shaft 18 etc. Component is undamaged, surface smooth, and size meets design requirement.Especially pay attention to the connection tightness between the subsection of inner gear ring 11 and the cleaning and flatness of the recess in shell 10.Prepare the external motor matched with the planetary gear box reduction mechanism and the tooling needed to be installed.

[0025] The segments of the inner ring 11 are accurately spliced according to the design requirements, and the outer diameter of the tooth features is ensured to be complete, and then the inner ring 11 is placed in the appropriate position, ready to be assembled with other components The first planetary gear 13 is installed on the first planetary carrier 15 through the pin shaft 14, ensuring that the first planetary gear 13 can rotate flexibly on the first planetary carrier 15, and the pin shaft 14 is firmly installed The same installation operation is carried out on the first and second stages of the reduction part The first planetary carrier 15 with the first planetary gear 13 installed is placed in the inner ring 11, so that the first planetary gear 13 and the inner ring 11 are well engaged Similarly, the second planetary gear 16 is installed on the second planetary carrier 17 through the pin shaft 14, and then the assembly of the second planetary carrier 17, the inner ring 11 and the second planetary gear 16 is placed in the appropriate position, ready for the next assembly The gasket 12 is installed at the corresponding position of the second planetary carrier 17 and the inner ring 11 and other components, and the number and position of the gasket 12 are adjusted according to actual needs to ensure that the gap between the components is appropriate, the movement is smooth and there is no interference The output shaft 18 is installed on the second planetary carrier 17 in an interference fit, and appropriate tools and processes can be used during installation, such as heating the second planetary carrier 17 or cooling the output shaft 18, to facilitate installation and ensure the quality of the interference fit, so that the output shaft 18 and the second planetary carrier 17 are firmly connected and have good coaxiality Finally, the housing 10 is installed outside the internal components that have been assembled, so that the recess in the housing 10 accurately matches the teeth of the inner ring 11, achieving radial positioning of the inner ring 11 At the same time, the mounting features (such as threaded holes) on the housing 10 are aligned with the corresponding mounting parts of the external motor and the hand tool, ready for fastening connection.

[0026] The output teeth of the external motor are correctly engaged with the first planetary gear 13 of the first stage of the planetary gear box reduction mechanism, ensuring that the engagement depth and angle are appropriate to ensure that the power can be effectively transmitted The housing 10 is fastened with the external motor and the hand tool according to the design requirements, and attention should be paid to the tightening torque to prevent it from being too loose or too tight After installation is completed, the output shaft 18 is manually rotated to check whether the entire planetary gear box reduction mechanism rotates smoothly and whether there is a jamming phenomenon At the same time, check whether there is abnormal friction or loose sound between the components If problems are found during debugging, such as unsmooth rotation and abnormal noise, debugging should be stopped in time to check whether the installation of the components is correct, especially the gear engagement, pin shaft 14 connection, shaft and hole cooperation and other parts, and then debug again after troubleshooting.

[0027] Power input and first stage reduction: when the external motor starts, the motor output gear begins to rotate, as it is engaged with the first stage first planetary gear 13 of the planetary gear box reduction mechanism, the motor output gear drives the first stage first planetary gear 13 to revolve around the inner gear ring 11. According to the planetary gear transmission principle, the first planetary gear 13 will produce rotation under the action of the inner gear ring 11 while revolving, and the rotation of the first planetary gear 13 is transmitted to the first planetary carrier 15 through the pin shaft 14, so that the first planetary carrier 15 rotates around the central axis of the planetary gear box. In this process, since the inner gear ring 11 is fixed (realized radial positioning through the cooperation of the shell 10 groove and the inner gear ring 11 protruding gear, and the shell 10 is fixedly connected with the outside), and the first planetary gear 13 revolves and rotates relative to the inner gear ring 11, according to the gear transmission ratio formula, the first stage reduction is realized, that is, the output speed is reduced and the torque is increased.

[0028] Second stage reduction: the rotation of the first planetary carrier 15 drives the second stage first planetary gear 13 to rotate (the second stage first planetary gear 13 shares the inner gear ring 11 with the first stage first planetary gear 13). Similarly, the second stage first planetary gear 13 revolves around the inner gear ring 11 and rotates, and the rotation of the second stage first planetary gear 13 is transmitted to the first planetary carrier 15 through the pin shaft 14 (the first planetary carrier 15 is the same component as the first stage), so that the first planetary carrier 15 further accelerates rotation (relative to the rotation speed of the first stage first planetary carrier 15). Since the inner gear ring 11 remains fixed, the engagement transmission between the second stage first planetary gear 13 and the inner gear ring 11 again realizes the effect of reduction and torque increase, further reducing the output speed and increasing the torque.

[0029] Third stage reduction and torque output: the rotation of the first planetary carrier 15 drives the third stage second planetary gear 16 to rotate (the third stage second planetary gear 16 shares the inner gear ring 11 with the previous two stages). The third stage second planetary gear 16 revolves around the inner gear ring 11 and rotates, and the rotation of the third stage second planetary gear 16 is transmitted to the second planetary carrier 17 through the pin shaft 14, so that the second planetary carrier 17 rotates around the central axis. The output shaft 18 is interference fitted on the second planetary carrier 17, and the rotation of the second planetary carrier 17 drives the output shaft 18 to rotate synchronously. In this stage of reduction, the same as the fixation of the inner gear ring 11 and the engagement relationship between the second planetary gear 16 and the inner gear ring 11, the third reduction and torque increase are realized. Finally, after three-stage reduction, the large torque is output to the external equipment or system through the output shaft 18, realizing the transmission of power and the amplification of torque, meeting the requirement of large torque output.

[0030] In the structural design, the segmented inner gear ring 11 and the use of special material not only ensure the gear strength to adapt to large torque output, but also facilitate manufacturing. The aluminum alloy material of the shell 10 and the groove design are beneficial to die casting and provide convenient installation features for the opponent piece, facilitating system integration. The three-stage reduction structure significantly increases the reduction ratio, effectively improves the output torque, and can meet the needs of many scenes with high torque requirements. In terms of manufacturing, the segmented inner gear ring 11, the die casting of the shell 10 and other characteristics reduce the manufacturing difficulty. In terms of installation, the design of each component facilitates precise assembly, and the installation features of the shell 10 simplify the connection with the outside. When running, the structure has good stability, the inner gear ring 11 and the shell 10 cooperate to ensure positioning accuracy, each gear meshes accurately, ensures smooth and efficient power transmission, reduces the probability of failure, prolongs the service life of the mechanism, and has wide application prospects in the fields of industrial production and mechanical transmission.

[0031] Of course, the utility model can also have other various embodiments, and other embodiments obtained by those skilled in the art based on the present embodiment without any creative labor belong to the range protected by the utility model.

Claims

1. A planetary gearbox reduction mechanism comprising a first stage reduction, a second stage reduction and a third stage reduction, characterised in that: The speed reduction mechanism comprises a housing, an inner ring, first planetary gears, a first planetary carrier, second planetary gears, and a second planetary carrier. The inner ring is designed in sections and has a convex tooth feature on its outer diameter. The housing has a groove inside that cooperates with the convex tooth of the inner ring. The housing has an assembly thread structure and a threaded hole feature. The first stage of speed reduction comprises the inner ring, the first planetary gears, a pin shaft, and the first planetary carrier. The first planetary gears are installed on the first planetary carrier through the pin shaft and mesh with the inner ring.

2. A planetary gearbox reduction mechanism according to claim 1, characterised in that: The first planetary carrier has a planetary gear feature with its central axis coinciding with the central axis of the planetary gear box speed reduction mechanism.

3. A planetary gearbox reduction mechanism according to claim 1, characterised in that: The inner ring is fixed in the housing and is radially positioned by the cooperation of the housing groove and the convex tooth of the inner ring. The housing is fixedly connected to the outside, and the position of the inner ring is relatively fixed during the entire working process.

4. The planetary gearbox reduction mechanism of claim 1, wherein: The second stage of speed reduction comprises the inner ring, the first planetary gears, a pin shaft, and the first planetary carrier. The second stage of speed reduction shares the inner ring with the first stage of speed reduction. The first planetary carrier is the same component, and the first planetary gears are different individuals but have the same specifications.

5. A planetary gearbox reduction mechanism according to claim 4, characterised in that: The first planetary gears are installed on the first planetary carrier through the pin shaft and mesh with the inner ring. The connection relationship and relative position remain consistent with the first stage of speed reduction.

6. A planetary gearbox reduction mechanism according to claim 5, characterised in that: The third stage of speed reduction comprises the inner ring, the second planetary gears, a pin shaft, and the second planetary carrier. The second planetary gears are installed on the second planetary carrier through the pin shaft and mesh with the inner ring.

7. A planetary gearbox reduction mechanism according to claim 6, characterised in that: The assembly of the second planetary carrier and the second planetary gears is compatible with the overall layout of the previous two stages of speed reduction.

8. The planetary gearbox reduction mechanism of claim 1, wherein: The second planetary carrier is installed with an output shaft through interference fit. The axis of the output shaft coincides with the rotational axis of the second planetary carrier.

9. The planetary gearbox reduction mechanism of claim 1, wherein: Gaskets are provided between adjacent inner rings and between the inner ring and the second planetary carrier.

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