Two-stage four-times variable speed planetary reducer

Abstract

The present application relates to a kind of two-stage four times variable speed planetary reducer, including input planetary gear reducer mechanism, output planetary gear reducer mechanism.Input planetary gear reducer mechanism includes input gear A, planetary gear A, inner ring gear shell A, planetary gear A includes coaxial large planetary gear A, small planetary gear A, input gear A drives large planetary gear A revolution, large planetary gear A drives small planetary gear A revolution with inner ring gear shell A meshing.Small planetary gear A rotates input gear B through gear shaft, and small planetary gear B rotates output transmission member through gear shaft.The two-stage four times variable speed planetary reducer of the present application adopts two-stage four times variable speed planetary gear reducer scheme, with the characteristics of light weight, compact structure, two-stage gear transmission, four times speed change.

Description

Technical Field

[0001] This invention relates to a speed reducer, and more particularly to an improved two-stage, four-speed planetary gear reducer, belonging to the field of gear reducers. Background Technology

[0002] A gear reducer is a mechanical device that uses the meshing transmission between gears with different pitch diameters to reduce the input speed. The ratio of the number of teeth on the large and small gears in the meshing transmission is the transmission ratio. With the continuous development of the reducer industry, gear reducers are widely used in industrial sectors such as metallurgy, mining, hoisting, and transportation, including machine tool rotary tables. Existing gear reducers have the following characteristics: (1) A single-stage gear transmission can only achieve a single reduction effect; (2) If a higher speed change is required, the number of gear transmission stages needs to be increased, resulting in low space utilization and power conversion efficiency; (3) Increasing the speed change by adding gear transmission pairs also increases backlash, reducing transmission accuracy; (4) Increasing the speed change by adding transmission stages also increases the reducer's weight, thus weakening its applicability. Summary of the Invention

[0003] This invention discloses a new solution for a two-stage, four-speed planetary gear reducer. It adopts a two-stage, four-speed planetary gear reducer solution, which solves the problem that existing similar solutions increase weight and volume due to the increase in the number of stages, thus affecting the applicability of the reducer.

[0004] This invention relates to a two-stage, four-speed planetary reducer, comprising an input planetary gear reduction mechanism and an output planetary gear reduction mechanism. The input planetary gear reduction mechanism includes an input gear A, planetary gear A, and an internal gear ring housing A. Planetary gear A includes a coaxial large planetary gear A and a small planetary gear A. The input gear A drives the large planetary gear A to revolve, and the large planetary gear A drives the small planetary gear A, which meshes with the internal gear ring housing A, to revolve. The output planetary gear reduction mechanism includes an input gear B, planetary gear B, and an internal gear ring housing B. Planetary gear B includes a coaxial large planetary gear B and a small planetary gear B. The small planetary gear A drives the input gear B to rotate via a gear shaft. The input gear B drives the large planetary gear B to revolve, and the large planetary gear B drives the small planetary gear B, which meshes with the internal gear ring housing B, to revolve. The small planetary gear B drives the output transmission component to rotate via a gear shaft.

[0005] Furthermore, in this design, one end of the internal gear ring housing A is connected to the input end base, the other end of the internal gear ring housing A is connected to one end of the internal gear ring housing B, and the other end of the internal gear ring housing B is connected to the output end base. The input end base, internal gear ring housing A, internal gear ring housing B, and output end base form an integrally fixedly connected reducer housing.

[0006] Furthermore, in this solution, one end of the gear shaft of input gear A forms an axially positioned sliding guide connection with the inner side of the input end base through a bearing, and the other end of the gear shaft of input gear A forms an axially positioned sliding guide connection with one end of the gear shaft of input gear B through a bearing.

[0007] Furthermore, in this solution, one end of the input gear B's gear shaft forms an axially positioned sliding guide connection with the inner side of the reducer housing through a bearing, and the other end of the input gear B's gear shaft forms an axially positioned sliding guide connection with the input end of the output transmission component through a bearing.

[0008] Furthermore, the output transmission component of this solution includes an inner output transmission disk and an outer output transmission disk. Planetary gear B is connected to one end of the inner output transmission disk via a gear shaft to form a transmission pin connection. The other end of the inner output transmission disk is connected to one end of the outer output transmission disk, and the other end of the outer output transmission disk is connected to an external mechanism.

[0009] Furthermore, the output transmission component of this solution forms an axially positioned sliding guide connection with the inner side of the output end base through a bearing.

[0010] Furthermore, in this design, the gear shaft of planetary gear B and the transmission pin joint of the output transmission inner disk are provided with multiple needle rollers.

[0011] Furthermore, in this scheme, the asteroid gear A is connected to the input end of the input gear B via a gear shaft to form a transmission pin connection, and multiple needle rollers are provided at the transmission pin connection.

[0012] Furthermore, the input planetary gear reduction mechanism of this scheme includes three planetary gears A arranged equidistantly along the circumference of the input gear A.

[0013] Furthermore, the output planetary gear reduction mechanism of this scheme includes five planetary gears B arranged at equal intervals along the circumference of the input gear B.

[0014] The present invention provides a two-stage, four-speed planetary reducer, which adopts a two-stage, four-speed planetary gear reducer scheme, and features light weight, compact structure, two-stage gear transmission, and four-speed change. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a two-stage, four-speed planetary gear reducer.

[0016] Figure 2 This is a schematic diagram of the output end of a two-stage, four-speed planetary reducer.

[0017] Figure 3 yes Figure 2 A schematic diagram of section AA.

[0018] Figure 4This is the schematic diagram of the input planetary gear reduction mechanism.

[0019] Figure 5 This is a schematic diagram of the output planetary gear reduction mechanism.

[0020] in,

[0021] 110 is the input gear A, 120 is the planetary gear A, 121 is the large planetary gear A, 122 is the small planetary gear A, and 130 is the internal gear ring outer shell A.

[0022] 210 is input gear B, 220 is planetary gear B, 221 is large planetary gear B, 222 is small planetary gear B, and 230 is the internal gear ring housing B.

[0023] 310 is the input frame, and 320 is the output frame.

[0024] 410 is the inner output drive disc, and 420 is the outer output drive disc.

[0025] 502 is a bearing, 503 is a screw, 504 is a needle roller, 505 is a spacer, and 506 is a baffle. Detailed Implementation

[0026] like Figure 2 , 3 As shown in Figures 4 and 5, the two-stage, four-speed planetary reducer of the present invention includes an input planetary gear reduction mechanism and an output planetary gear reduction mechanism. The input planetary gear reduction mechanism includes an input gear A, planetary gear A, and an internal gear ring housing A. Planetary gear A includes a coaxial large planetary gear A and a small planetary gear A. The input gear A drives the large planetary gear A to revolve, and the large planetary gear A drives the small planetary gear A, which meshes with the internal gear ring housing A, to revolve. The output planetary gear reduction mechanism includes an input gear B, planetary gear B, and an internal gear ring housing B. Planetary gear B includes a coaxial large planetary gear B and a small planetary gear B. The small planetary gear A drives the input gear B to rotate via a gear shaft. The input gear B drives the large planetary gear B to revolve, and the large planetary gear B drives the small planetary gear B, which meshes with the internal gear ring housing B, to revolve. The small planetary gear B drives the output transmission component to rotate via a gear shaft.

[0027] The above scheme adopts a two-stage, four-speed-change planetary gear reducer. It utilizes the input gear A110 of the first-stage input planetary gear reducer mechanism to change speed twice with the large planetary gear A121 and the small planetary gear A122 and the internal gear ring housing A130, and the input gear B210 of the second-stage output planetary gear reducer mechanism to change speed twice with the large planetary gear B221 and the small planetary gear B222 and the internal gear ring housing B230. This achieves a two-stage, four-speed-change planetary gear reducer scheme, which overcomes the problem of existing schemes increasing the number of gear transmission stages to improve the speed change, thereby increasing the weight and volume of the reducer and limiting its applicability. Only two stages of gear transmission are needed to effectively improve the speed change.

[0028] To meet transmission requirements, external housing solutions for the speed reducer are provided, such as... Figure 1 , 2 As shown in Figure 3, in this scheme, one end of the inner gear ring housing A is connected to the input end base, the other end of the inner gear ring housing A is connected to one end of the inner gear ring housing B, and the other end of the inner gear ring housing B is connected to the output end base. The input end base, inner gear ring housing A, inner gear ring housing B, and output end base form an integrally fixedly connected reducer housing.

[0029] Based on the above solutions, in order to ensure the stability of the rotating parts' movement and improve the compactness of the reducer's internal layout, such as... Figure 3 As shown, in this scheme, one end of the gear shaft of input gear A forms an axially positioned sliding guide connection with the inner side of the input end housing via a bearing, and the other end of the gear shaft of input gear A forms an axially positioned sliding guide connection with one end of the gear shaft of input gear B via a bearing. Similarly, in this scheme, one end of the gear shaft of input gear B forms an axially positioned sliding guide connection with the inner side of the reducer housing via a bearing, and the other end of the gear shaft of input gear B forms an axially positioned sliding guide connection with the input end of the output transmission component via a bearing.

[0030] To realize the function of the output transmission component and meet the requirements of transmission output, this solution discloses a specific transmission connection structure, such as... Figure 3 As shown, the output transmission component of this scheme includes an inner output transmission disk and an outer output transmission disk. Planetary gear B is connected to one end of the inner output transmission disk via a gear shaft to form a transmission pin connection. The other end of the inner output transmission disk is connected to one end of the outer output transmission disk, and the other end of the outer output transmission disk is connected to an external mechanism.

[0031] Based on the above solutions, in order to ensure the stability of the rotating parts' movement and improve the compactness of the reducer's internal layout, such as... Figure 3 As shown, the output transmission component of this solution forms an axially positioned sliding guide connection with the inner side of the output end housing via a bearing. To avoid excessive friction caused by factors such as component rotation, such as... Figure 3 As shown, in this design, the gear shaft of planetary gear B and the transmission pin joint of the output transmission inner disk are provided with multiple needle rollers. Similarly, in this design, the small planetary gear A forms a transmission pin joint with the input end disk of the gear shaft of input gear B through a gear shaft, and multiple needle rollers are provided at the transmission pin joint.

[0032] like Figure 4 , 5 As shown, to achieve two-stage, four-speed transformation, this solution discloses a specific gear transmission speed transformation method. The input planetary gear reduction mechanism includes three planetary gears (A) arranged equidistantly along the circumference of the input gear (A), and the output planetary gear reduction mechanism includes five planetary gears (B) arranged equidistantly along the circumference of the input gear (B). However, the number of planetary gears in this solution is not limited to the above scheme and can be other suitable configurations based on specific requirements.

[0033] This solution discloses a planetary gear reducer that achieves two speed changes through the first-stage gear transmission and two speed changes through the second-stage gear transmission, thereby achieving a two-stage, four-speed-change effect. The speed range is expanded from the ordinary 9-64 reduction ratio to 9-500.

[0034] like Figure 3 As shown, install the corresponding bearings 502, needle rollers 504, and baffles 506 into the reducer housing in sequence, and tighten them with the corresponding screws 503. Then install the input gear A 110. First, apply an appropriate amount of grease to the inside of the internal gear ring housing A 130, and then install the already installed input gear B 210 into the internal gear ring housing A 130. Next, install the spacer 505, input end base 310, corresponding bearings 502, and input gear A 110 in sequence, and tighten them with the corresponding screws 503. Finally, install the internal gear ring housing B 230 into the internal gear ring housing A 130. Install the corresponding bearing 502 into the output end base 320, and install the output transmission inner plate 410 onto the corresponding bearing 502. Then, install the corresponding bearing 502, needle roller 504 and planetary gear B 220 into the output transmission inner plate 410 in sequence. First, apply an appropriate amount of grease to the inside of the internal gear ring housing B 230, and then install the already installed output end base 320 onto the internal gear ring housing B 230. Tighten and fix it with the corresponding screws 503. Finally, install the output transmission outer plate 420 onto the output transmission inner plate 410 and tighten and fix it with the corresponding screws 503.

[0035] The first-stage input gear A110 drives the large planetary gear A121 to rotate. The large planetary gear A121 and the small planetary gear A122 are coaxially arranged. The large planetary gear A121 acts as a transition gear during the transmission process and does not mesh with the inner gear ring housing A130. The large planetary gear A121, the small planetary gear A122 and the inner gear ring housing A130 have a corresponding and fixed positional relationship. The small planetary gear A122 meshes with the inner gear ring housing A130. That is, the input gear A110 and the large planetary gear A121 drive and reduce speed, and the small planetary gear A122 and the inner gear ring housing A130 drive and reduce speed.

[0036] The second-stage input gear B210 drives the large planetary gear B221 to rotate. The large planetary gear B221 and the small planetary gear B222 are coaxially arranged. The large planetary gear B221 acts as a transition gear during the transmission process and does not mesh with the inner gear ring housing B230. The large planetary gear B221, the small planetary gear B222 and the inner gear ring housing B230 have a corresponding and fixed positional relationship. The small planetary gear B222 meshes with the inner gear ring housing B230. That is, the input gear B210 and the large planetary gear B221 drive and reduce speed, and the small planetary gear B222 and the inner gear ring housing B230 drive and reduce speed.

[0037] The combination of the first-stage gear transmission and the second-stage gear transmission achieves the technical objective of four-stage gear transmission. Specifically, the number of teeth on planetary gear A 121 is greater than that on small planetary gear A 122, and the number of teeth on planetary gear B 221 is greater than that on small planetary gear B 222, thus achieving a speed reduction effect.

[0038] Based on the above technical content, this solution has the following characteristics:

[0039] (1) The difference between this solution and existing products is that it achieves a four-stage speed reduction effect through a two-pole planetary gear transmission.

[0040] (2) The difference between this solution and existing products lies in the improvement of single-stage variable speed, space utilization and power conversion rate.

[0041] (3) The difference between this solution and existing products is that it reduces the number of transmission stages, reduces the backlash that is unavoidable in primary gear transmission, and thus improves transmission accuracy.

[0042] (4) The difference between this solution and existing products is that by reducing the number of transmission stages, its own weight is reduced by nearly half, making the planetary reducer suitable for robot joints and transfer equipment.

[0043] Therefore, this solution solves the following technical problems compared to existing products:

[0044] (1) This solution solves the problem of excessive size caused by the increased number of stages in planetary gear reducers with large reduction ratios. This solution can meet the requirements with a maximum of two stages, depending on the reduction ratio.

[0045] (2) This solution solves the problem of insufficient internal space utilization in existing planetary gear reducers. Unlike ordinary planetary reducers, this solution adopts a compact design with a very compact structure, making it easy to apply to various robots working in confined spaces. Its weight is only half that of RV robot reducers and comparable to harmonic reducers.

[0046] (3) This solution addresses the problem of low strength in existing high-end speed reducers. The new speed reducer in this design has a higher total number of teeth involved in operation, thus increasing the overall strength of the speed reducer.

[0047] (4) This solution solves the problem of short accuracy retention time in existing high-end reducers. The multiple teeth involved in this solution indirectly offset gear backlash, reduce the wear base per unit number of teeth, and improve gear accuracy retention time.

[0048] (5) This solution addresses the problem of low power conversion efficiency at high reduction ratios in existing high-end reducers due to their low strength. This makes it possible to widely apply planetary gear reducers to robot joints.

[0049] Unless otherwise specified, the mechanisms, structures, and transmission connections disclosed in this solution can all be implemented using common and conventional solutions known in the art. The two-stage, four-speed planetary reducer of this solution is not limited to the content disclosed in the specific embodiments. The technical solutions appearing in the embodiments can be extended based on the understanding of those skilled in the art, and simple substitutions made by those skilled in the art based on this solution and common knowledge also fall within the scope of this solution.

Claims

1. A two-stage, four-speed planetary reducer, characterized by: The system includes an input planetary gear reduction mechanism and an output planetary gear reduction mechanism. The input planetary gear reduction mechanism includes an input gear A, planetary gear A, and an internal gear ring housing A. Planetary gear A includes a coaxial large planetary gear A and a small planetary gear A. The input gear A drives the large planetary gear A to revolve, and the large planetary gear A drives the small planetary gear A, which meshes with the internal gear ring housing A, to revolve. The output planetary gear reduction mechanism includes an input gear B, planetary gear B, and an internal gear ring housing B. Planetary gear B includes a coaxial large planetary gear B and a small planetary gear B. The small planetary gear A drives the input gear B to rotate via a gear shaft. The input gear B drives the large planetary gear B to revolve, and the large planetary gear B drives the small planetary gear B, which meshes with the internal gear ring housing B, to revolve. The small planetary gear B drives the output transmission component to rotate via a gear shaft. One end of the internal gear ring housing A is connected to the input end base, and the other end of the internal gear ring housing A is connected to one end of the internal gear ring housing B. The other end of the internal gear ring housing B is connected to the output end base. The input end base, internal gear ring housing A, internal gear ring housing B, and output end base form an integrally fixed reducer housing. One end of the gear shaft of the input gear A is connected to the inner side of the input end base via a bearing to form an axially positioned sliding guide connection. The other end of the gear shaft of the input gear A is connected to one end of the gear shaft of the input gear B via a bearing to form an axially positioned sliding guide connection. One end of the gear shaft of the input gear B is connected to the inner side of the reducer housing via a bearing to form an axially positioned sliding guide connection. The other end of the gear shaft of the input gear B is connected to the input end of the output transmission component via a bearing to form an axially positioned sliding guide connection.

2. The two-stage, four-speed planetary reducer according to claim 1, characterized in that, The output transmission component includes an inner output transmission disk and an outer output transmission disk. The planetary gear B is connected to one end of the inner output transmission disk via a gear shaft to form a transmission pin. The other end of the inner output transmission disk is connected to one end of the outer output transmission disk, and the other end of the outer output transmission disk is connected to an external mechanism.

3. The two-stage, four-speed planetary reducer according to claim 2, characterized in that, The output transmission component is axially positioned and slidably guided to the inner side of the output end base via a bearing.

4. The two-stage, four-speed planetary reducer according to claim 2, characterized in that, The planetary gear B has multiple needle rollers at the connection between its gear shaft and the transmission pin of the output transmission inner disk.

5. The two-stage, four-speed planetary reducer according to claim 1, characterized in that, The asteroid gear A forms a transmission pin connection with the input end wheel disk of the input gear B's gear shaft via a gear shaft, and multiple needle rollers are provided at the transmission pin connection.

6. The two-stage, four-speed planetary reducer according to claim 1, characterized in that, The input planetary gear reduction mechanism includes three planetary gears A arranged at equal intervals along the circumference of the input gear A.

7. The two-stage, four-speed planetary reducer according to claim 1, characterized in that, The output planetary gear reduction mechanism includes five planetary gears B arranged at equal intervals along the circumference of the input gear B.

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