Planetary reduction gearbox for multi-speed-ratio walking

Abstract

The utility model provides a planetary reduction gearbox for multi-speed-ratio walking, and relates to the field of gear boxes. The speed regulating device comprises a supporting shaft, a speed regulating assembly and an output assembly. The supporting shaft is provided with an assembling hole; the speed regulation assembly comprises a first sun gear, a first planet gear, a first planet carrier, a speed regulation gear ring, a first clutch and a second clutch; the first sun gear is rotatably mounted in the speed regulating gear ring, and the first sun gear is connected with the speed regulating gear ring through a first clutch; the first planet carrier is arranged in the assembling hole and rotatably matched with the supporting shaft, the first planet wheel is rotatably installed on the first planet carrier, and the first planet wheel is meshed with the first sun wheel and the speed adjusting gear ring at the same time; the speed regulating gear ring is arranged in the assembling hole and is connected with the supporting shaft through the second clutch; the output assembly comprises a multi-stage planetary transmission mechanism, and an input part of the multi-stage planetary transmission mechanism is in transmission connection with the first planet carrier. The reduction gearbox is compact in structure, small in size and capable of achieving the effects of multi-speed-ratio gear shifting and speed reducing and torque increasing.

Description

Technical Field

[0001] The utility model relates to the field of gear boxes, in particular to a planetary reduction box for multi-speed ratio travel. Background Art

[0002] The gearbox of the existing engineering machinery includes a housing and an input shaft, a transmission assembly, a first-gear clutch, a second-gear clutch and an output assembly all arranged inside the housing; the input shaft is used for power input, and the input shaft is respectively connected to the first-gear clutch and the second-gear clutch through the transmission assembly for gear shifting of the gearbox, and power is output through the transmission assembly. In order to achieve multi-speed ratio shifting of the planetary gearbox, some design schemes adopt the method of adding a set of parallel-stage or planetary-stage mechanical shifting structures outside the reducer, which will increase the total volume of the reducer, resulting in the advantage of the compact structure of the planetary reducer no longer existing; some design schemes adopt the method of controlling the number of gear trains involved in the deceleration to achieve the effect of multiple speed ratios, but the torque is directly output through the shaft body, and the output torque is small. Therefore, the reducer of the prior art cannot take into account the effects of small size, multi-speed ratio shifting and deceleration and torque increase at the same time. Utility Model Content

[0003] The utility model aims to provide a multi-speed ratio planetary reduction box for traveling, which can achieve the effects of compact structure, small volume, multi-speed ratio shifting and deceleration and torque increase.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In a first aspect, the utility model provides a multi-speed ratio planetary reduction gearbox for traveling, comprising:

[0006] A support shaft, a speed regulating assembly and an output assembly; the support shaft is provided with an assembly hole;

[0007] The speed regulating assembly includes a first sun gear, a first planetary gear, a first planet carrier, a speed regulating gear ring, a first clutch and a second clutch; the first sun gear is rotatably mounted in the speed regulating gear ring, and the first sun gear and the speed regulating gear ring are connected through a first clutch; the first planet carrier is arranged in the assembly hole and rotatably cooperates with the support shaft, the first planetary gear is rotatably mounted on the first planet carrier, and the first planetary gear is meshed with the first sun gear and the speed regulating gear ring at the same time; the speed regulating gear ring is arranged in the assembly hole and is connected to the support shaft through a second clutch;

[0008] The output assembly includes a multi-stage planetary transmission mechanism, and an input portion of the multi-stage planetary transmission mechanism is drivingly connected to the first planet carrier.

[0009] In an optional embodiment, a flange is installed at the end of the support shaft;

[0010] The first clutch includes a first oil ring, a first piston, a first elastic member, a first friction plate group and a second friction plate group; the first oil ring is installed in the assembly hole, the first piston and the first oil ring are slidably matched, and the two together define a first oil chamber; the first elastic member is clamped between the flange and the first piston, and is used to make the first piston have a movement tendency to reduce the first oil chamber; the first friction plate group is connected to the first sun gear, and the second friction plate group is connected to the speed regulating gear ring; the first piston is used to press the first friction plate group and the second friction plate group under the action of the first elastic member.

[0011] Based on the above scheme, the first clutch is set as a pressure-loss normally closed brake structure, that is, when hydraulic oil is not injected into the first oil chamber, under the action of the first elastic member, the first friction plate group and the second friction plate group are in a compressed state. At this time, the first sun gear and the speed gear ring are connected together, and the two will not rotate relative to each other. They are in a braking state, and there will be no pressure loss leading to brake failure, and the operation is stable. When the brake needs to be released, hydraulic oil is injected into the first oil chamber, the first elastic member is compressed, the pressure of the first piston acting on the first friction plate group and the second friction plate group is reduced, the first friction plate group and the second friction plate group are separated, and the first sun gear and the speed gear ring can rotate relative to each other.

[0012] In an optional embodiment, a first oil hole is provided on the flange, a second oil hole is provided on the support shaft, and the first oil hole is connected to the first oil chamber through the second oil hole.

[0013] Based on the above solution, the first oil hole is connected to the hydraulic system, so as to control the amount of hydraulic oil in the first oil chamber, thereby controlling the working state of the first clutch.

[0014] In an optional embodiment, the second clutch includes a second oil ring, a second piston, a second elastic member, a third friction plate group and a fourth friction plate group. The second oil ring is installed in the assembly hole and is located on the side of the first oil ring away from the flange. The second piston and the second oil ring are slidably matched, and the two together define a second oil chamber; the second elastic member is clamped between the first oil ring and the second piston, so as to make the second piston have a movement tendency to reduce the second oil chamber; the third friction plate group is connected to the speed regulating gear ring, and the fourth friction plate group is connected to the support shaft; the second piston is used to press the third friction plate group and the fourth friction plate group under the action of the second elastic member.

[0015] Based on the above scheme, the second clutch is set as a pressure-loss normally closed brake structure, that is, when hydraulic oil is not injected into the second oil chamber, under the action of the second elastic member, the third friction plate group and the fourth friction plate group are in a compressed state. At this time, the support shaft and the speed gear ring are connected together, and the two will not rotate relative to each other. They are in a braking state, and there will be no situation where the brake fails due to pressure loss, and the operation is stable. Combined with the first clutch, when the first clutch and the second clutch are both in a pressure-loss state, the first sun gear and the speed gear ring will not rotate, and the reduction gear box is in a braking state. When the brake needs to be released, hydraulic oil is injected into the second oil chamber, the second elastic member is compressed, the pressure of the second piston acting on the third friction plate group and the fourth friction plate group is reduced, the third friction plate group and the fourth friction plate group are separated, and the speed gear ring can rotate relative to the support shaft.

[0016] In an optional embodiment, a third oil hole is provided on the flange, a fourth oil hole is provided on the support shaft, the third oil hole is connected to the fourth oil hole, and the fourth oil hole is connected to the second oil chamber.

[0017] Based on the above scheme, the second oil hole is connected to the hydraulic system, so as to control the amount of hydraulic oil in the second oil chamber, thereby controlling the working state of the second clutch.

[0018] In an optional embodiment, the multi-stage planetary transmission mechanism includes an output ring gear, which is sleeved on the outside of the support shaft and rotatably cooperates with the support shaft. The output part of each stage of the planetary transmission mechanism is connected to the output ring gear, and the output ring gear is used to connect to the drive wheel.

[0019] Based on the above scheme, the multi-stage planetary transmission mechanism merges the power into the output ring gear to achieve the effect of deceleration and torque increase.

[0020] In an optional embodiment, the multi-stage planetary transmission mechanism includes a first-stage transmission mechanism and a second-stage transmission mechanism, the output part of the first-stage transmission mechanism is connected to the output ring gear and the input part of the second-stage transmission mechanism at the same time; the output part of the second-stage transmission mechanism is connected to the output ring gear.

[0021] Based on the above scheme, the number of multi-stage planetary transmission mechanisms can be set as needed, the layout is flexible, and the scope of use is wide.

[0022] In an optional embodiment, the first-stage transmission mechanism includes a second sun gear, a second planet carrier and a second planet gear, the second sun gear is connected to the first planet carrier; the second planet carrier is sleeved on the outside of the first sun gear, the second planet gear is rotatably mounted on the second planet carrier, and the second planet gear is meshed with the output ring gear and the second sun gear at the same time.

[0023] Based on the above scheme, the first-stage transmission mechanism has a simple structure, is easy to assemble, and has stable and reliable torque transmission.

[0024] In an optional embodiment, the second-stage transmission mechanism includes a third sun gear and a third planetary gear, the third sun gear is sleeved on the outside of the second sun gear and the two are rotatably matched, the third planetary gear is rotatably mounted on the support shaft, and the third planetary gear is meshed with the third sun gear and the output ring gear at the same time.

[0025] Based on the above scheme, the second-stage transmission mechanism has a simple structure, is easy to assemble, and has stable and reliable torque transmission.

[0026] In an optional embodiment, the support shaft is outer-circuited with a support bearing and a locking nut, the output gear ring is sleeved outside the support bearing, and the locking nut abuts against the support bearing to limit the axial freedom of the support bearing on the support shaft.

[0027] Based on the above solution, the connection between the support shaft and the output gear ring is realized by cooperating with multiple support bearings, which can improve the coaxiality of the output gear ring and the support shaft, and the output gear ring has little shaking when rotating, and runs smoothly. In addition, the locking nut limits the position of the support bearing, and the position of the support bearing relative to the support shaft is stable, not easy to move, not easy to wear and fail, and has a long service life.

[0028] The beneficial effects of the embodiments of the utility model are:

[0029] In summary, the multi-speed ratio planetary reduction box provided in this embodiment is connected with the first sun gear and the speed regulating ring gear through the first clutch, and the speed regulating ring gear is connected with the support shaft through the second clutch. The first clutch and the second clutch can be independently regulated. By adjusting the working state of the first clutch and the second clutch, the first clutch and the second clutch cooperate to output power through the first planet carrier in the form of low speed, high speed, braking and neutral. In addition, the first planet carrier is connected to the multi-stage planetary transmission mechanism, and the torque output by the first planet carrier can further achieve the effect of deceleration and torque increase after passing through the multi-stage planetary transmission mechanism. At the same time, the speed regulating assembly is arranged in the assembly hole inside the support shaft, and the internal space of the support shaft is reasonably utilized to improve the compactness of the speed regulating assembly, reduce the overall volume of the reduction box, reduce the overall weight, and facilitate miniaturization and lightweight design. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A cross-sectional view of a multi-speed ratio planetary reduction gearbox for traveling according to an embodiment of the utility model from one perspective;

[0032] Figure 2 for Figure 1 A local enlarged schematic diagram in FIG.

[0033] Figure 3 This is a cross-sectional view from another perspective of the multi-speed ratio planetary reduction box for travel according to an embodiment of the utility model.

[0034] icon:

[0035] 100-support shaft; 101-assembly hole; 102-second oil hole; 103-fourth oil hole; 200-speed control assembly; 210-first sun gear; 220-first planetary gear; 230-first planetary carrier; 231-speed control ring gear; 240-first clutch; 241-first oil ring; 242-first piston; 243-first elastic member; 244-first friction plate group; 245-second friction plate group; 246-first oil chamber; 250-second clutch; 251-second oil ring; 252-second piston; 253-second elastic member Components; 254-third friction plate group; 255-fourth friction plate group; 256-second oil chamber; 300-output assembly; 310-output ring gear; 320-second sun gear; 330-second planetary carrier; 340-second planetary gear; 350-third sun gear; 360-third planetary gear; 370-first support bearing; 380-second support bearing; 390-locking nut; 400-flange; 401-first oil hole; 402-third oil hole; 500-first bearing; 600-second bearing; 700-floating oil seal. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Please combine Figure 1The present embodiment provides a multi-speed ratio planetary reduction gearbox for travel, which includes a support shaft 100, a speed regulating assembly 200 and an output assembly 300; the support shaft 100 is provided with an assembly hole 101; the speed regulating assembly 200 includes a first sun gear 210, a first planetary gear 220, a first planetary carrier 230, a speed regulating ring gear 231, a first clutch 240 and a second clutch 250; the first sun gear 210 is rotatably mounted in the speed regulating ring gear 231, and the first sun gear 210 and the speed regulating ring gear 231 are connected by a first clutch 240 is connected; the first planetary carrier 230 is arranged in the assembly hole 101 and is rotatably matched with the support shaft 100, the first planetary gear 220 is rotatably mounted on the first planetary carrier 230, and the first planetary gear 220 is meshed with the first sun gear 210 and the speed regulating ring gear 231 at the same time; the speed regulating ring gear 231 is arranged in the assembly hole 101 and is connected to the support shaft 100 through the second clutch 250; the output assembly 300 includes a multi-stage planetary transmission mechanism, and the input part of the multi-stage planetary transmission mechanism is transmission-connected to the first planetary carrier 230.

[0043] Based on the above, the working mode of the multi-speed ratio planetary reduction gearbox provided in this embodiment is as follows:

[0044] A power source such as a hydraulic motor or an electric motor can be connected to the first sun gear 210. After the first sun gear 210 rotates, the power can be transmitted to the first planet carrier 230 under the cooperation of the speed ring gear 231, the first planetary gear 220, the first clutch 240 and the second clutch 250, and the power is transmitted to the multi-stage planetary transmission mechanism through the first planet carrier 230, and then transmitted to the drive wheel through the multi-stage planetary transmission mechanism to achieve power output. It should be understood that the working states of the first clutch 240 and the second clutch 250 are independently regulated, and switching between low speed, high speed, braking and neutral can be achieved.

[0045] The following embodiments illustrate the detailed structure of a multi-speed ratio planetary reduction gearbox by way of examples.

[0046] In this embodiment, the planetary reduction box for multi-speed ratio travel optionally includes a support shaft 100, a speed regulating assembly 200, an output assembly 300 and a flange 400. The flange 400 is mounted on one end of the support shaft 100, the flange 400 is used to be fixedly connected to the power source, the speed regulating assembly 200 and the output assembly 300 are both mounted on the support shaft 100, the speed regulating assembly 200 is used to transmit power to the output assembly 300, and the output assembly 300 is used to be connected to the drive wheel and output the power to the drive wheel.

[0047] Please combine Figure 1 and Figure 3The flange 400 is provided with a first oil hole 401 and a third oil hole 402, which are arranged at intervals in the circumferential direction of the flange 400, and the support shaft 100 is provided with a second oil hole 102 and a fourth oil hole 103, the first oil hole 401 is connected with the second oil hole 102, and the third oil hole 402 is connected with the fourth oil hole 103.

[0048] Please combine Figure 1 In this embodiment, the speed regulating assembly 200 optionally includes a first sun gear 210, a first planetary gear 220, a first planetary carrier 230, a speed regulating ring gear 231, a first clutch 240 and a second clutch 250. The first sun gear 210 is rotatably mounted in the speed regulating ring gear 231 through a first bearing 500, and the first sun gear 210 and the speed regulating ring gear 231 are connected through the first clutch 240. The first planetary carrier 230 is disposed in the assembly hole 101 and rotatably cooperates with the support shaft 100 through the second bearing 600, the first planetary gear 220 is rotatably mounted on the first planetary carrier 230, and the first planetary gear 220 is meshed with the first sun gear 210 and the speed regulating ring gear 231 at the same time. The speed regulating ring gear 231 is disposed in the assembly hole 101 and is connected to the support shaft 100 through the second clutch 250.

[0049] Please combine Figure 1 and Figure 2 , wherein the first clutch 240 includes a first oil ring 241, a first piston 242, a first elastic member 243, a first friction plate group 244 and a second friction plate group 245. The first oil ring 241 is installed in the assembly hole 101, the first piston 242 and the first oil ring 241 are slidably matched in the axial direction of the support shaft 100, and the two together define a first oil chamber 246, and the second oil hole 102 is connected to the first oil chamber 246. The first elastic member 243 is clamped between the flange 400 and the first piston 242, and is used to make the first piston 242 have a movement tendency to reduce the first oil chamber 246. The first elastic member 243 can be a spring, and the end surface of the first piston 242 can be provided with a positioning blind hole for installing the first elastic member 243, which can stabilize the position of the first elastic member 243. The first friction plate group 244 is connected to the first sun gear 210, the second friction plate group 245 is connected to the speed gear ring 231, the multiple friction plates of the first friction plate group 244 and the multiple friction plates of the second friction plate group 245 are arranged alternately in sequence, and the first piston 242 is used to press the first friction plate group 244 and the second friction plate group 245 under the action of the first elastic member 243. That is, in the initial state, when the hydraulic oil is not injected into the first oil chamber 246, the first elastic member 243 has a tendency to make the first piston 242 move rightward, and the first piston 242 presses the first friction plate group 244 and the second friction plate group 245, and the first sun gear 210 and the speed gear ring 231 will not rotate relative to each other.

[0050] Please combine Figure 1 and Figure 2 The second clutch 250 includes a second oil ring 251, a second piston 252, a second elastic member 253, a third friction plate group 254 and a fourth friction plate group 255. The second oil ring 251 is installed in the assembly hole 101 and is located on the side of the first oil ring 241 away from the flange 400. The second piston 252 and the second oil ring 251 can be slidably matched, and the two together define a second oil chamber 256. The fourth oil hole 103 is connected to the second oil chamber 256. The second elastic member 253 is clamped between the first oil ring 241 and the second piston 252, and is used to make the second piston 252 have a tendency to reduce the movement of the second oil chamber 256. The second elastic member 253 can be a spring. The end surface of the second piston 252 close to the first oil ring 241 can be provided with a positioning blind hole for installing the second elastic member 253, which can stabilize the position of the second elastic member 253 and enable the second elastic member 253 to provide a stable elastic force. The third friction plate group 254 is connected to the speed gear ring 231, the fourth friction plate group 255 is connected to the support shaft 100, the multiple friction plates of the third friction plate group 254 and the multiple friction plates of the fourth friction plate group 255 are arranged alternately in sequence, and the second piston 252 is used to press the third friction plate group 254 and the fourth friction plate group 255 under the action of the second elastic member 253. That is, in the initial state, when the hydraulic oil is not injected into the second oil chamber 256, the second elastic member 253 has a tendency to make the second piston 252 move rightward, and the second piston 252 presses the third friction plate group 254 and the fourth friction plate group 255, and the speed gear ring 231 will not rotate relative to the support shaft 100.

[0051] With such a design, the first clutch 240 and the second clutch 250 are both configured as pressure-loss normally closed brake structures, which are less likely to cause brake failure and are stable and reliable to use.

[0052] Please combine Figure 1In this embodiment, optionally, the multi-stage planetary transmission mechanism includes an output gear ring 310, a first-stage transmission mechanism and a second-stage transmission mechanism. The output gear ring 310 is sleeved on the outside of the support shaft 100 and is rotatably matched with the support shaft 100 through the first support bearing 370 and the second support bearing 380. A floating oil seal 700 is arranged between the output gear ring 310 and the support shaft 100. The first support bearing 370 limits the axial degree of freedom through the steps on the outer peripheral surface of the support shaft 100 and the steps on the inner wall surface of the output gear ring 310. The inner side of the second support bearing 380 close to the first support bearing 370 is limited by the steps on the inner wall surface of the output gear ring 310. A locking nut 390 is arranged outside the support shaft 100, and the outer side of the second support bearing 380 away from the first support bearing 370 is limited by the locking nut 390. The output part of the first-stage transmission mechanism is connected to the output gear ring 310 and the input part of the second-stage transmission mechanism at the same time; the output part of the second-stage transmission mechanism is connected to the output gear ring 310. The output ring gear 310 is used to connect with the driving wheel. For example, a flange structure may be provided on the output ring gear 310 to connect with the driving wheel by utilizing the flange structure, so that the assembly is convenient and reliable.

[0053] Optionally, the first-stage transmission mechanism includes a second sun gear 320, a second planet carrier 330 and a second planet gear 340, and the second sun gear 320 is connected to the first planet carrier 230. The second planet carrier 330 is sleeved outside the first sun gear 210, and the second planet gear 340 is rotatably mounted on the second planet carrier 330. The second planet gear 340 is meshed with the output ring gear 310 and the second sun gear 320 at the same time. The second-stage transmission mechanism includes a third sun gear 350 and a third planet gear 360, and the third sun gear 350 is sleeved outside the second sun gear 320 and the two are rotatably matched. The third planet gear 360 is rotatably mounted on the support shaft 100, and the third planet gear 360 is meshed with the third sun gear 350 and the output ring gear 310 at the same time. Since the third sun gear 350 is sleeved outside the second sun gear 320, the radial space of the reduction box is reasonably used, and the axial length of the reduction box is small, and the axial size is small. During operation, the first planetary carrier 230 transmits power to the second sun gear 320, and the second sun gear 320 transmits torque to the second planetary gear 340. The second planetary gear 340 can drive the second planetary carrier 330 and the output ring gear 310 to rotate. When the second planetary carrier 330 rotates, it drives the third sun gear 350 to rotate, thereby transmitting the torque to the output ring gear 310 through the third planetary gear 360, thereby achieving the purpose of deceleration and torque increase.

[0054] Alternatively, in other embodiments, the second-stage transmission mechanism may include a third planet carrier, and the third planet carrier may be integrally formed with the support shaft 100 or fixed on the support shaft 100 .

[0055] The multi-speed ratio planetary reduction gearbox provided in this embodiment has the following working states:

[0056] Braking status:

[0057] When the first oil chamber 246 and the second oil chamber 256 are not filled with oil and pressurized, the first sun gear 210, the speed regulating ring gear 231 and the support shaft 100 are relatively fixed and do not rotate, and the reduction gearbox is in a braking state.

[0058] Low speed ratio state:

[0059] When the first oil chamber 246 is not filled with oil and pressurized and the second oil chamber 256 is filled with oil and pressurized, the first sun gear 210 and the speed regulating ring gear 231 are relatively fixed and do not rotate relative to each other. In this state, the first planetary gear 220 no longer rotates on its own, but revolves with the first sun gear 210. The output speed of the first planetary carrier 230 is the same as the output speed of the first sun gear 210. The first planetary carrier 230 transmits the torque to the second sun gear 320 through the spline. After the second planetary gear 340, the second planetary carrier 330, the third sun gear 350, and the third planetary gear 360 reduce speed and increase torque, the torque is output through the output ring gear 310.

[0060] High speed ratio status:

[0061] When the first oil chamber 246 is filled with oil and the second oil chamber 256 is not filled with oil, the first sun gear 210 and the speed regulating ring gear 231 can rotate relative to each other, and the support shaft 100 and the speed regulating ring gear 231 no longer move relative to each other. In this state, the input torque is decelerated and increased through the first sun gear 210, the first planetary gear 220, the first planetary carrier 230, the second planetary gear 340, the second planetary carrier 330, the third sun gear 350, and the third planetary gear 360, and then the torque is output through the output ring gear 310.

[0062] Neutral state:

[0063] When the first oil chamber 246 and the second oil chamber 256 are both filled with oil and pressurized, the first sun gear 210 rotates relative to the speed ring gear 231, and the speed ring gear 231 rotates relative to the support shaft 100. The input torque drives the speed ring gear 231 to idle through the first sun gear 210 and the first planetary gear 220, and the first planetary carrier 230 will not output torque to the multi-stage planetary transmission mechanism, and the multi-stage planetary transmission mechanism will not intervene in the operation.

[0064] In the multi-speed ratio planetary reduction box provided in this embodiment, the first planet carrier 230 is connected to the multi-stage planetary transmission mechanism, and the torque output by the first planet carrier 230 can further achieve the effect of deceleration and torque increase after passing through the multi-stage planetary transmission mechanism. At the same time, the speed regulating assembly 200 is arranged in the assembly hole 101 inside the support shaft 100, and the internal space of the support shaft 100 is reasonably utilized to improve the compactness of the speed regulating assembly 200, reduce the overall volume of the reduction box, reduce the overall weight, and facilitate miniaturization and lightweight design.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-speed ratio planetary reduction gearbox, characterized in that: include: A support shaft (100), a speed regulating assembly (200) and an output assembly (300); the support shaft (100) is provided with an assembly hole (101); The speed regulating assembly (200) comprises a first sun gear (210), a first planetary gear (220), a first planetary carrier (230), a speed regulating ring gear (231), a first clutch (240) and a second clutch (250); the first sun gear (210) is rotatably mounted in the speed regulating ring gear (231), and the first sun gear (210) and the speed regulating ring gear (231) are connected via the first clutch (240); the first planetary carrier (230) is disposed in the assembly hole (101) and rotatably cooperates with the support shaft (100), the first planetary gear (220) is rotatably mounted on the first planetary carrier (230), and the first planetary gear (220) is meshed with the first sun gear (210) and the speed regulating ring gear (231) at the same time; the speed regulating ring gear (231) is disposed in the assembly hole (101) and is connected to the support shaft (100) via the second clutch (250); The output assembly (300) comprises a multi-stage planetary transmission mechanism, the input portion of which is in transmission connection with the first planet carrier (230).

2. The multi-speed ratio planetary reduction gearbox according to claim 1, characterized in that: A flange (400) is installed at the end of the support shaft (100); The first clutch (240) comprises a first oil ring (241), a first piston (242), a first elastic member (243), a first friction plate group (244) and a second friction plate group (245); the first oil ring (241) is installed in the assembly hole (101), the first piston (242) and the first oil ring (241) are slidably matched, and the two together define a first oil chamber (246); the first elastic member (243) is clamped between the flange (400) and the first piston (242) to enable the first piston (242) to have a movement tendency to reduce the first oil chamber (246); the first friction plate group (244) is connected to the first sun gear (210), and the second friction plate group (245) is connected to the speed regulating gear ring (231); the first piston (242) is used to press the first friction plate group (244) and the second friction plate group (245) under the action of the first elastic member (243).

3. The multi-speed ratio planetary reduction gearbox according to claim 2, characterized in that: The flange (400) is provided with a first oil hole (401), the support shaft (100) is provided with a second oil hole (102), and the first oil hole (401) is connected to the first oil chamber (246) through the second oil hole (102).

4. The multi-speed ratio planetary reduction gearbox according to claim 2, characterized in that: The second clutch (250) comprises a second oil ring (251), a second piston (252), a second elastic member (253), a third friction plate group (254) and a fourth friction plate group (255); the second oil ring (251) is installed in the assembly hole (101) and is located on the side of the first oil ring (241) away from the flange (400); the second piston (252) and the second oil ring (251) are slidably matched, and the two together define a second oil chamber (256); the second elastic member (253) is installed in the assembly hole (101) and is located on the side of the first oil ring (241) away from the flange (400); the second piston (252) and the second oil ring (251) are slidably matched, and the two together define a second oil chamber (256); 53) is clamped between the first oil ring (241) and the second piston (252), and is used to make the second piston (252) have a movement tendency to reduce the second oil chamber (256); the third friction plate group (254) is connected to the speed regulating gear ring (231), and the fourth friction plate group (255) is connected to the support shaft (100); the second piston (252) is used to press the third friction plate group (254) and the fourth friction plate group (255) under the action of the second elastic member (253).

5. The multi-speed ratio planetary reduction gearbox according to claim 4, characterized in that: The flange (400) is provided with a third oil hole (402), the support shaft (100) is provided with a fourth oil hole (103), the third oil hole (402) is connected to the fourth oil hole (103), and the fourth oil hole (103) is connected to the second oil chamber (256).

6. The multi-speed ratio planetary reduction gearbox according to claim 1, characterized in that: The multi-stage planetary transmission mechanism comprises an output ring gear (310), the output ring gear (310) is sleeved outside the support shaft (100) and rotatably cooperates with the support shaft (100), the output part of each stage of the planetary transmission mechanism is connected to the output ring gear (310), and the output ring gear (310) is used to be connected to a driving wheel.

7. The multi-speed ratio planetary reduction gearbox according to claim 6, characterized in that: The multi-stage planetary transmission mechanism comprises a first-stage transmission mechanism and a second-stage transmission mechanism, wherein the output portion of the first-stage transmission mechanism is simultaneously connected to the output ring gear (310) and the input portion of the second-stage transmission mechanism; and the output portion of the second-stage transmission mechanism is connected to the output ring gear (310).

8. The multi-speed ratio planetary reduction gearbox according to claim 7, characterized in that: The first-stage transmission mechanism comprises a second sun gear (320), a second planet carrier (330) and a second planet gear (340); the second sun gear (320) is connected to the first planet carrier (230); the second planet carrier (330) is sleeved outside the first sun gear (210); the second planet gear (340) is rotatably mounted on the second planet carrier (330); and the second planet gear (340) is meshed with the output ring gear (310) and the second sun gear (320) at the same time.

9. The multi-speed ratio planetary reduction gearbox according to claim 8, characterized in that: The second-stage transmission mechanism comprises a third sun gear (350) and a third planetary gear (360); the third sun gear (350) is sleeved on the outside of the second sun gear (320) and the two are rotatably matched; the third planetary gear (360) is rotatably mounted on the support shaft (100); and the third planetary gear (360) is meshed with the third sun gear (350) and the output ring gear (310) at the same time.

10. The multi-speed ratio planetary reduction gearbox according to any one of claims 6 to 9, characterized in that: The support shaft (100) is externally connected with a support shaft (100) bearing and a locking nut (390); the output gear ring (310) is sleeved on the outside of the support shaft (100) bearing; the locking nut (390) abuts against the support shaft (100) bearing to limit the axial freedom of the support shaft (100) bearing on the support shaft (100).

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