Speed reducer

Abstract

According to the speed reducer provided by the embodiment of the invention, the motor inputs the rotating speed, the rotating speed is output through four-stage planetary gear transmission speed reduction, the overall structure is compact, and the relative cost is also greatly reduced. According to the technical scheme, the device specifically comprises a motor, a planetary gear transmission speed reduction assembly and an output assembly; the motor is connected with the output assembly through the planetary gear transmission speed reduction assembly. The planetary gear transmission speed reduction assembly comprises an inner gear ring, a first-stage planetary transmission assembly, a second-stage planetary transmission assembly, a third-stage planetary transmission assembly and a fourth-stage planetary transmission assembly, the inner gear ring wraps the first-stage planetary transmission assembly, the second-stage planetary transmission assembly, the third-stage planetary transmission assembly and the fourth-stage planetary transmission assembly; the bottom of the first-stage planetary transmission assembly is connected with the motor, and the top of the fourth-stage planetary transmission assembly is connected with the output assembly.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a reducer. Background Art

[0002] Reducers match speeds and transmit torque between the prime mover and the working machine or actuator, and are widely used in modern machinery. Reducers can be divided into two categories based on their application: general-purpose reducers and specialized reducers. Each category has distinct design, manufacturing, and operational characteristics.

[0003] Currently, reducers use parallel shaft systems and other gear systems as reduction transmission outputs, which usually include components such as rotating bracket guides, gear rack transmission mechanisms, etc.

[0004] However, there are some disadvantages. The structure is relatively complex, and multiple components and mechanical connections are designed. Multiple moving parts will increase the failure rate due to mechanical wear, component failure or connection problems, and multiple moving parts will also lead to relatively high costs. Utility Model Content

[0005] In view of the above problems, the embodiments of the present invention are proposed to provide a reducer that overcomes the above problems or at least partially solves the above problems:

[0006] A reducer comprises a motor, a planetary gear transmission reduction assembly and an output assembly;

[0007] The motor is connected to the output assembly via the planetary gear transmission reduction assembly;

[0008] The planetary gear transmission reduction assembly includes an inner ring gear and a first-stage planetary transmission assembly, a second-stage planetary transmission assembly, a third-stage planetary transmission assembly, and a fourth-stage planetary transmission assembly connected in sequence; the inner ring gear encloses the first-stage planetary transmission assembly, the second-stage planetary transmission assembly, the third-stage planetary transmission assembly, and the fourth-stage planetary transmission assembly;

[0009] The bottom of the first-stage planetary transmission assembly is connected to the motor, and the top of the fourth-stage planetary transmission assembly is connected to the output assembly.

[0010] Preferably, the inner side of the inner gear ring is provided with tooth patterns that mesh with the first-stage planetary transmission assembly, the second-stage planetary transmission assembly, the third-stage planetary transmission assembly and the fourth-stage planetary transmission assembly.

[0011] Preferably, the first-stage planetary transmission assembly includes a first base plate, a first washer, a first sun gear, a first planetary gear and a first planetary shaft;

[0012] The first gasket is disposed between the first base plate and the first planetary gears. At least three first planetary gears are disposed at equal intervals around the first sun gear. The first planetary shaft is disposed in the middle of the first planetary gears. The number of the first planetary shafts is the same as the number of the first planetary gears.

[0013] The bottom of the first base plate is connected to the motor.

[0014] Preferably, the second stage planetary transmission assembly includes a second base plate, a second washer, a second sun gear, a second planetary gear and a second planetary shaft;

[0015] The second sun gear is arranged in the middle of the second base plate, and the second gasket is arranged between the second base plate and the second planetary gear; at least three second planetary gears are arranged at equal intervals around the circumference of the second sun gear, and the second planetary shaft is arranged in the middle of the second planetary gear; wherein the number of the second planetary shafts is the same as the number of the second planetary gears.

[0016] Preferably, the third-stage planetary transmission assembly includes a third base plate, a third gasket, a third sun gear, a third planetary gear and a third planetary shaft;

[0017] The third sun gear is arranged in the middle of the third base plate, and the third gasket is arranged between the third base plate and the third planetary gear; at least three third planetary gears are arranged at equal intervals around the circumference of the third sun gear, and the third planetary shaft is arranged in the middle of the third planetary gear; wherein the number of the third planetary shafts is the same as the number of the third planetary gears.

[0018] Preferably, the fourth-stage planetary transmission assembly includes a fourth base plate, a fourth gasket, a fourth sun gear, a fourth planetary gear and a fourth planetary shaft;

[0019] The fourth sun gear is arranged in the middle of the fourth base plate, and the fourth gasket is arranged between the fourth base plate and the fourth planetary gear; at least three fourth planetary gears are arranged at equal intervals around the circumference of the fourth sun gear, and the fourth planetary shaft is arranged in the middle of the fourth planetary gear; wherein the number of the fourth planetary shafts is the same as the number of the fourth planetary gears.

[0020] Preferably, the first-stage planetary transmission assembly and the second-stage planetary transmission assembly are both made of polyoxymethylene material.

[0021] Preferably, the third-stage planetary transmission assembly and the fourth-stage planetary transmission assembly are both made of powder metallurgy.

[0022] Preferably, the output assembly includes a connecting post and a shell sleeved outside the connecting post; and teeth are provided inside the connecting post.

[0023] Preferably, a top gasket is provided on the top of the shell.

[0024] This application specifically includes the following advantages:

[0025] In the embodiments of the present application, compared with the prior art which has "relatively complex structure, multiple components and mechanical connections, and high cost", the present application provides a solution of "adopting a four-stage planetary gear transmission, wherein the first and second stage planetary gear transmissions adopt POM material, the third and fourth stage planetary gear transmissions adopt powder metallurgy material, and the four stage planetary reduction gears share an inner ring gear. The rotation speed is input by the motor and output through the four-stage planetary gear transmission with a compact overall structure and a relatively greatly reduced cost." Specifically, the solution comprises a motor, a planetary gear transmission reduction assembly and an output assembly; the motor is connected to the output assembly through the planetary gear transmission reduction assembly; the planetary gear transmission reduction assembly comprises an inner ring gear and a first stage planetary transmission assembly, a second stage planetary transmission assembly, a third stage planetary transmission assembly, and a fourth stage planetary transmission assembly connected in sequence; the inner ring gear wraps the first stage planetary transmission assembly, the second stage planetary transmission assembly, the third stage planetary transmission assembly and the fourth stage planetary transmission assembly; the bottom of the first stage planetary transmission assembly is connected to the motor, and the top of the fourth stage planetary transmission assembly is connected to the output assembly. The four-stage planetary gear transmission solves the problem of relatively complex structure, multiple components and mechanical connections, and high cost. The four-stage planetary reduction gears share a single internal ring gear. The motor inputs the speed, which is reduced by the four-stage planetary gear transmission. The overall structure is compact and the relative cost is significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the description of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 This is an exploded view of a reducer of the present utility model;

[0028] Figure 2 This is a schematic structural diagram of a reducer of the utility model;

[0029] Figure 3 This is a schematic structural diagram of an output component of a reducer of the present invention;

[0030] Figure 4 This is a structural diagram of a connecting column of a reducer of the utility model;

[0031] Figure 5 This is a schematic structural diagram of an inner gear ring of a reducer of the present invention;

[0032] Figure 6 This is a structural diagram of a first base plate of a reducer of the present utility model;

[0033] Figure 7 This is a schematic cross-sectional structure diagram of a reducer of the utility model;

[0034] 1. Motor; 2. First-stage planetary transmission assembly; 21. First base plate; 22. First gasket; 23. First sun gear; 24. First planetary gear; 25. First planetary shaft; 3. Second-stage planetary transmission assembly; 31. Second base plate; 32. Second gasket; 33. Second sun gear; 34. Second planetary gear; 35. Second planetary shaft; 4. Third-stage planetary transmission assembly; 5. Fourth-stage planetary transmission assembly; 6. Internal ring gear; 7. Output assembly; 71. Connecting column; 72. Housing; 73. Top gasket. DETAILED DESCRIPTION

[0035] To make the objectives, features, and advantages of this application more readily apparent, the present application is further described below in conjunction with the accompanying drawings and specific embodiments. It is apparent that the embodiments described are only a portion of the embodiments of this application, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in this application without inventive effort are also within the scope of protection of this application.

[0036] Through analysis of existing technology, the inventors discovered that speed reducers are widely used in modern machinery, matching speeds and transmitting torque between a prime mover and a working machine or actuator. Speed ​​reducers can be categorized by their intended use: general-purpose speed reducers and specialized speed reducers. These two types differ in their design, manufacturing, and operational characteristics. Speed ​​reducers are independent, closed transmission devices between a prime mover and a working machine, designed to reduce speed and increase torque to meet operational requirements.

[0037] At present, the flip screen reducer adopts parallel shaft system and other gear systems as the reduction transmission output, which usually includes components such as rotating bracket guide rails and gear rack transmission mechanisms. However, there are some disadvantages: first, the structure is relatively complex, and the design of multiple components and mechanical connections may increase the difficulty of repair and maintenance; second, multiple moving parts will increase the failure rate due to mechanical wear, component failure or connection problems; and multiple moving parts will also lead to relatively high costs.

[0038] It should be noted that the reducer of the present application is applied to a flip screen, but is not limited to use with a flip screen.

[0039] In the embodiments of the present application, compared with the prior art which has "relatively complex structure, multiple components and mechanical connections, and high cost", the present application provides a solution of "using a four-stage planetary gear transmission, wherein the first and second stage planetary gear transmissions are made of POM material, the third and fourth stage planetary gear transmissions are made of powder metallurgy material, and the four-stage planetary reduction gears share an inner ring gear 6. The rotational speed is input by the motor 1 and output is reduced by the four-stage planetary gear transmission. The overall structure is compact and the relative cost is greatly reduced." Specifically, the solution comprises a motor 1, a planetary gear transmission reduction assembly and an output assembly 7; the motor 1 is connected to the output assembly 7 via the planetary gear transmission reduction assembly; the planetary gear transmission reduction assembly comprises an inner ring gear 6 and a first-stage planetary transmission assembly 2, a second-stage planetary transmission assembly 3, a third-stage planetary transmission assembly 4, and a fourth-stage planetary transmission assembly 5 connected in sequence; the inner ring gear 6 wraps the first-stage planetary transmission assembly 2, the second-stage planetary transmission assembly 3, the third-stage planetary transmission assembly 4, and the fourth-stage planetary transmission assembly 5; the bottom of the first-stage planetary transmission assembly is connected to the motor 1, and the top of the fourth-stage planetary transmission assembly is connected to the output assembly 7. The four-stage planetary gear transmission solves the problem of relatively complex structure, multiple components and mechanical connections, and high cost. The four-stage planetary reduction gears share a single internal ring gear 6. The input speed is from the motor 1, and the output speed is reduced by the four-stage planetary gear transmission. The overall structure is compact and the relative cost is greatly reduced.

[0040] Reference Figure 1-7 , shows a structural schematic diagram of the reducer of the present invention, which may specifically include the following structure: it includes a motor 1, a planetary gear transmission reduction assembly and an output assembly 7; the motor 1 is connected to the output assembly 7 through the planetary gear transmission reduction assembly; the planetary gear transmission reduction assembly includes an inner ring gear 6 and a first-stage planetary transmission assembly 2, a second-stage planetary transmission assembly 3, a third-stage planetary transmission assembly 4, and a fourth-stage planetary transmission assembly 5 connected in sequence; the inner ring gear 6 wraps the first-stage planetary transmission assembly 2, the second-stage planetary transmission assembly 3, the third-stage planetary transmission assembly 4 and the fourth-stage planetary transmission assembly 5; the bottom of the first-stage planetary transmission assembly is connected to the motor 1, and the top of the fourth-stage planetary transmission assembly is connected to the output assembly 7.

[0041] Next, a speed reducer in this exemplary embodiment will be further described.

[0042] It's important to note that, in addition to rotating around their own axes (BB) like fixed-axis gears, planetary gears also rotate along the blue carrier (called the planet carrier) around the axes of other gears (AA). Rotation about their own axes is called "rotation," while rotation about the axes of other gears is called "revolution," much like the planets in the solar system, hence the name. A planetary gear transmission is one in which the axes of one or more gears rotate around the fixed axis of another. The planets rotate both around their own axes and along with the carrier around a fixed axis.

[0043] In one embodiment of the present application, the motor 1 is connected to the output assembly 7 through the planetary gear transmission reduction assembly; the top of the motor 1 is connected to the first base plate 21, and the two are adapted to each other; the output end of the motor 1 is connected to the first-stage planetary transmission assembly.

[0044] In one embodiment of the present application, the inner side of the inner ring gear 6 is provided with tooth patterns that mesh with the first stage planetary transmission assembly 2 , the second stage planetary transmission assembly 3 , the third stage planetary transmission assembly 4 and the fourth stage planetary transmission assembly 5 .

[0045] As an example, the tooth pattern inside the inner gear ring 6 is adapted to the first planetary gear 24, the second planetary gear 34, the third planetary gear, and the fourth planetary gear, and the tooth pattern inside the inner gear ring 6 is the same from top to bottom. The top of the inner gear ring 6 is adapted to the housing 72, and the two are engaged.

[0046] In one embodiment of the present application, the first-stage planetary transmission assembly 2 includes a first base plate 21, a first gasket 22, a first sun gear 23, a first planetary gear 24 and a first planetary shaft 25; the first gasket 22 is arranged between the first base plate 21 and the first planetary gear 24, at least three first planetary gears 24 are arranged at equal intervals around the first sun gear 23, and the first planetary shaft 25 is arranged in the middle of the first planetary gear 24; wherein, the number of the first planetary shafts 25 is the same as the number of the first planetary gears 24; and the bottom of the first base plate 21 is connected to the motor 1.

[0047] In a specific embodiment, the first planetary gears 24 are all identical, with the same shape and size, so as to be able to rotate around the first sun gear 23 .

[0048] In one embodiment of the present application, the second-stage planetary transmission assembly 3 includes a second base plate 31, a second gasket 32, a second sun gear 33, a second planetary gear 34 and a second planetary shaft 35; the second sun gear 33 is arranged in the middle of the second base plate 31, and the second gasket 32 ​​is arranged between the second base plate 31 and the second planetary gear; at least three second planetary gears 34 are arranged at equal intervals around the second sun gear 33, and the second planetary shaft 35 is arranged in the middle of the second planetary gear 34; wherein the number of the second planetary shafts 35 is the same as the number of the second planetary gears 34.

[0049] In a specific embodiment, the second planetary gears 34 are all identical, with the same shape and size, so as to be able to rotate around the second sun gear 33 .

[0050] In one embodiment of the present application, the first-stage planetary transmission assembly 2 and the second-stage planetary transmission assembly 3 are both made of polyoxymethylene material.

[0051] It's important to note that polyoxymethylene (POM, IUPAC name) is a polymer of formaldehyde (high molecular weight polyoxymethylene), typically with a structure length of eight to one hundred units. Long-chain polyoxymethylene is commonly used in heat-resistant plastics, also known as polyoxymethylene plastics (POE, DuPont's Derlin). Because of its rapid decomposition, polyoxymethylene has a slight odor and is used for fumigation and disinfection, as well as for preparing pure formaldehyde (for formalin). When formaldehyde solutions are stored at low temperatures, paraformaldehyde slowly forms, precipitating as a white, insoluble substance.

[0052] In one embodiment of the present application, the third-stage planetary transmission assembly 4 includes a third base plate, a third gasket, a third sun gear, a third planetary gear and a third planetary shaft; the third sun gear is arranged in the middle of the third base plate, and the third gasket is arranged between the third base plate and the third planetary gear; at least three third planetary gears are arranged at equal intervals around the third sun gear, and the third planetary shaft is arranged in the middle of the third planetary gear; wherein the number of the third planetary shafts is the same as the number of the third planetary gears.

[0053] In one embodiment of the present application, the fourth-stage planetary transmission assembly 5 includes a fourth base plate, a fourth gasket, a fourth sun gear, a fourth planetary gear and a fourth planetary shaft; the fourth sun gear is arranged in the middle of the fourth base plate, and the fourth gasket is arranged between the fourth base plate and the fourth planetary gear; at least three fourth planetary gears are arranged at equal intervals around the fourth sun gear, and the fourth planetary shaft is arranged in the middle of the fourth planetary gear; wherein the number of the fourth planetary shafts is the same as the number of the fourth planetary gears.

[0054] In one embodiment of the present application, the third-stage planetary transmission assembly 4 and the fourth-stage planetary transmission assembly 5 are both made of powder metallurgy.

[0055] It should be noted that powder metallurgy is a process for producing metal powder or using metal powder (or a mixture of metal powder and non-metallic powder) as raw material, forming and sintering it to create metal materials, composite materials, and various types of products. Powder metallurgy shares similarities with ceramic production, both involving powder sintering techniques. Therefore, a range of new powder metallurgy technologies can also be applied to the production of ceramic materials. Due to its advantages, powder metallurgy has become the key to solving new material problems and plays a vital role in the development of new materials. Powder metallurgy encompasses both powder production and product development. Powder production is primarily a metallurgical process, as the name implies. However, powder metallurgy products often go far beyond the scope of materials and metallurgy, often involving multiple disciplines (materials and metallurgy, mechanics, and mechanics). Modern metal powder 3D printing, in particular, integrates mechanical engineering, CAD, reverse engineering, layered manufacturing, CNC technology, materials science, and laser technology, making powder metallurgy product technology a modern, multidisciplinary, and multidisciplinary approach.

[0056] In one embodiment of the present application, the output assembly 7 includes a connecting post 71 and a housing 72 that is sleeved on the outside of the connecting post 71. The connecting post 71 has a toothed interior. The housing 72 is provided with a top gasket 73 on top. Two top gaskets 73 are provided.

[0057] This application utilizes a four-stage planetary gear transmission, with the first and second stages constructed from POM, and the third and fourth stages constructed from powder metallurgy. The four-stage planetary reduction gears share a common internal gear ring 6. The motor 1 provides input speed, which is then reduced by the four-stage planetary gear transmission. This results in a compact overall structure and significantly reduced costs.

[0058] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0059] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0060] The above is a detailed introduction to a reducer provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A reducer, characterized in that: It includes a motor, a planetary gear transmission reduction assembly and an output assembly; The motor is connected to the output assembly through the planetary gear transmission reduction assembly; The planetary gear transmission reduction assembly comprises an inner gear ring and a first-stage planetary transmission assembly, a second-stage planetary transmission assembly, a third-stage planetary transmission assembly, and a fourth-stage planetary transmission assembly connected in sequence; the inner gear ring wraps the first-stage planetary transmission assembly, the second-stage planetary transmission assembly, the third-stage planetary transmission assembly, and the fourth-stage planetary transmission assembly; The bottom of the first-stage planetary transmission assembly is connected to the motor, and the top of the fourth-stage planetary transmission assembly is connected to the output assembly.

2. The reducer according to claim 1, characterized in that: The inner side of the inner gear ring is provided with tooth patterns that mesh with the first-stage planetary transmission assembly, the second-stage planetary transmission assembly, the third-stage planetary transmission assembly, and the fourth-stage planetary transmission assembly.

3. The reducer according to claim 1, characterized in that: The first-stage planetary transmission assembly includes a first base plate, a first gasket, a first sun gear, a first planetary gear and a first planetary shaft; The first gasket is arranged between the first bottom plate and the first planetary gear, at least three first planetary gears are arranged at equal intervals around the first sun gear, and the first planetary shaft is arranged in the middle of the first planetary gear; wherein the number of the first planetary shafts is the same as the number of the first planetary gears; The bottom of the first base plate is connected to the motor.

4. The reducer according to claim 1, characterized in that: The second-stage planetary transmission assembly includes a second base plate, a second gasket, a second sun gear, a second planetary gear and a second planetary shaft; The second sun gear is arranged in the middle of the second base plate, and the second gasket is arranged between the second base plate and the second planetary gear; at least three second planetary gears are arranged at equal intervals around the circumference of the second sun gear, and the second planetary shaft is arranged in the middle of the second planetary gear; wherein the number of the second planetary shafts is the same as the number of the second planetary gears.

5. The reducer according to claim 1, characterized in that: The third-stage planetary transmission assembly includes a third base plate, a third gasket, a third sun gear, a third planetary gear and a third planetary shaft; The third sun gear is arranged in the middle of the third base plate, and the third gasket is arranged between the third base plate and the third planetary gear; at least three third planetary gears are arranged at equal intervals around the third sun gear, and the third planetary shaft is arranged in the middle of the third planetary gear; wherein the number of the third planetary shafts is the same as the number of the third planetary gears.

6. The reducer according to claim 1, characterized in that: The fourth-stage planetary transmission assembly includes a fourth base plate, a fourth gasket, a fourth sun gear, a fourth planetary gear and a fourth planetary shaft; The fourth sun gear is arranged in the middle of the fourth base plate, and the fourth gasket is arranged between the fourth base plate and the fourth planetary gear; at least three fourth planetary gears are arranged at equal intervals around the circumference of the fourth sun gear, and the fourth planetary shaft is arranged in the middle of the fourth planetary gear; wherein the number of the fourth planetary shafts is the same as the number of the fourth planetary gears.

7. The reducer according to claim 1, characterized in that: The first-stage planetary transmission assembly and the second-stage planetary transmission assembly are both made of polyoxymethylene material.

8. The reducer according to claim 1, characterized in that: The third-stage planetary transmission assembly and the fourth-stage planetary transmission assembly are both made of powder metallurgy.

9. The reducer according to claim 1, characterized in that: The output assembly comprises a connecting post and a shell sleeved outside the connecting post; and teeth are arranged inside the connecting post.

10. The reducer according to claim 9, characterized in that: A top gasket is provided on the top of the shell.

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