A gear transmission

Abstract

This invention discloses a gearbox, comprising: a housing; a power input shaft and a power output shaft rotatably passing through the housing; a gear set; wherein the gear set is divided into several relatively independent units with different transmission ratios, each unit including an input half-shaft, an output half-shaft, a brake gear, and a brake assembly, the brake gear being coaxially and rotatably fitted onto the output half-shaft, and the brake assembly being used to brake the brake gear of the corresponding unit when the corresponding unit becomes a power output line; a pair of planetary gears, half-shaft gear one, a pair of planetary gears, and half-shaft gear two meshing sequentially. Compared with existing mainstream gearboxes, it can switch output speed gears without a clutch, is less prone to damage, and reduces the jerkiness of gear shifting operations.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission technology, specifically, to a gearbox. Background Technology

[0002] In mechanical transmission systems, gearboxes, as the main devices for transmitting power, are widely used in metallurgy, mining, hoisting and transportation, power, energy, building materials, light industry, transportation and other industrial sectors, especially in transmission applications requiring large torque.

[0003] Numerous patents exist in the prior art concerning gearboxes. For example, Chinese patent CN106979281A discloses a two-speed gearbox with dual clutches, comprising an electric motor, an intermediate shaft, a first clutch, a second clutch, a first set of gears, and a second set of gears. The electric motor includes a main shaft. The first and second clutches are coaxially mounted on the intermediate shaft. The first set of gears is connected to the first clutch via a first shaft portion of the intermediate shaft to generate a first gear ratio. The second set of gears is connected to the second clutch via a second shaft portion of the intermediate shaft to generate a second gear ratio, which is different from the first gear ratio. When the first clutch is actuated and engaged with the first shaft portion, the second clutch disengages from the second shaft portion, and the electric motor outputs a first torque corresponding to the first gear ratio via the first set of gears. When the second clutch is actuated and engaged with the second shaft portion, the first clutch disengages from the first shaft portion, and the electric motor outputs a second torque corresponding to the second gear ratio via the second set of gears.

[0004] Regardless, in existing technologies, gearboxes need to be shifted multiple times in situations involving high torque transmission, which requires the clutch to operate. This inevitably leads to some degree of damage to the clutch, and the shifting operation will produce a certain degree of jerking (i.e., a jerking sensation). Summary of the Invention

[0005] The purpose of this invention is to provide a gear transmission that, compared with existing mainstream transmissions, is less prone to damage and reduces jerking sensation.

[0006] The object of this invention is achieved as follows: a gearbox, comprising:

[0007] Box shell;

[0008] The power input shaft and power output shaft are rotatably connected through the housing shell. One end of the power input shaft is connected to a rotary drive unit, and the other end of the power input shaft is fixedly sleeved with a power input gear. The input end of the power output shaft is fixedly sleeved with a power output gear.

[0009] Gear sets that mesh with power input gears and power output gears;

[0010] The gear assembly is divided into several relatively independent units with different transmission ratios, each unit comprising:

[0011] An input half-shaft is fixedly fitted with an access gear and a half-shaft gear, the access gear meshing with a power input gear;

[0012] The output half-shaft has its axis coincident with the axis of the input half-shaft. The output half-shaft is fixedly fitted with an output gear and a half-shaft gear two. The output gear meshes with the power output gear.

[0013] Braking gear and braking assembly, wherein the braking gear is coaxially rotatably sleeved on the output half shaft, and the braking assembly is connected to the housing and is used to brake the braking gear of the corresponding unit when the corresponding unit becomes a power output line;

[0014] A pair of planetary gears, each planetary gear being equipped with a gear seat, the planetary gears being rotatably connected to the gear seat, the gear seat being fixedly connected to the brake gear, and the first half-shaft gear, the pair of planetary gears, and the second half-shaft gear meshing in sequence.

[0015] The housing contains an intermediate transmission gear that meshes with the brake gear and is controlled by the braking assembly.

[0016] The braking assembly includes a brake wheel and a brake element, wherein the brake wheel is coaxial with the intermediate transmission gear and is controlled by the braking element.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. To select the corresponding gear output torque, simply brake the brake gear of the gear set unit of the corresponding speed gear. This will enable the gear set unit of the corresponding speed gear to form a power output line. The brake gears of other units of the gear set will not be braked, and the other units of the gear set will rotate at a differential speed, without affecting the transmission of the power output line.

[0019] 2. Compared with existing mainstream transmissions, it can switch gears based on output speed without a clutch, is less prone to damage, and reduces the jerking sensation during gear shifting. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of the present invention.

[0021] Figure 2 This is a schematic diagram of a state without power output.

[0022] Figure 3 This is a schematic diagram of the power output state. Detailed Implementation

[0023] The following will refer to the appendices in the embodiments of the present invention. Figure 1-3 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a gearbox includes:

[0025] Box shell 16;

[0026] The power input shaft 1 and power output shaft 10 are rotatably connected to the housing 16. One end of the power input shaft 1 is connected to the rotary drive unit, and the other end of the power input shaft 1 is fixedly sleeved with the power input gear 2. The input end of the power output shaft 10 is fixedly sleeved with the power output gear 9.

[0027] A gear set that meshes with the power input gear 2 and the power output gear 9.

[0028] The gear set is divided into several relatively independent units with different transmission ratios, which correspond to the output speeds of different gears. The number of units in the gear set can be two or more, and there is no specific limit.

[0029] Each unit of the gear set includes:

[0030] Input half-shaft 4, input half-shaft 4 is fixedly fitted with access gear 3 and half-shaft gear 51, access gear 3 meshes with power input gear 2;

[0031] Output half-shaft 7, the axis of output half-shaft 7 coincides with the axis of input half-shaft 4, output half-shaft 7 is fixedly fitted with output gear 8 and half-shaft gear 52, output gear 8 meshes with power output gear 9;

[0032] Braking gear 12 and braking assembly: Braking gear 12 is coaxially rotatably sleeved on output half shaft 7; braking assembly is connected to housing 16 and is used to brake the braking gear 12 of the corresponding unit when the corresponding unit becomes power output line 18.

[0033] A pair of planetary gears 6, each planetary gear 6 is equipped with a gear seat 11, the planetary gear 6 is rotatably connected to the gear seat 11, the gear seat 11 is fixedly connected to the brake gear 12, half-shaft gear 1 51, a pair of planetary gears 6 and half-shaft gear 2 52 mesh in sequence, the axes of the pair of planetary gears 6 coincide with each other and are located on two opposite sides around half-shaft gear 2 52.

[0034] In this gear set, the diameters of the input gear 3 and / or output gear 8 of each unit are different, while the dimensions of the remaining gears can be consistent.

[0035] Without altering the core concept, any changes to the number of gears or the shape of the housing 16 are within the scope of protection of this invention.

[0036] An intermediate transmission gear 13 is rotatably disposed inside the housing 16 and meshes with the brake gear 12. The aforementioned braking assembly includes a brake wheel 14 and a brake element 15. The brake wheel 14 is coaxial with the intermediate transmission gear 13 and is controlled by the brake element 15.

[0037] To ensure rapid control, the aforementioned brake component 15 is configured as a disc brake controlled by an electronic control system (or other control methods, such as manual control, hydraulic control, or other conventional control methods, which are not limited here). The disc brake is an existing conventional component, and the electronic control system can drive the brake component 15 to quickly brake the brake wheel 14, so that the brake wheel 14, intermediate transmission gear 13, and brake gear 12 can quickly stop rotating.

[0038] The aforementioned brake component 15 can be other brake components, not limited to the disc brake proposed in this embodiment.

[0039] This embodiment takes the gear set as two units as an example to introduce the transmission of the gear set under two working conditions: no power output and power output. In order to facilitate the marking of rotating and stationary states, rotating parts are marked with arrows, and stationary parts are marked with ×.

[0040] like Figure 2 As shown, for the state of no power output, the transmission sequence of the two units of the gear set is as follows:

[0041] Power input gear 2 → Connecting gear 3 → Half shaft gear 1 51 → Planetary gear 6 → Brake gear 12 → Intermediate transmission gear 13 → Brake wheel 14. Among them, while the planetary gear 6 revolves around the axis of the half shaft gear 2 52, the planetary gear 6 also rotates on its own axis and rolls on the half shaft gear 2 52.

[0042] The stationary components include: half-shaft gear 2 52, output half-shaft 7, output gear 8, power output gear 9, and power output shaft 10.

[0043] Regarding the transmission situation described above, the corresponding explanations are as follows:

[0044] When the brake wheel 14 is not braked, the rotation of the first half-shaft gear 51 drives a pair of planetary gears 6 to rotate around the axis of the second half-shaft gear 52. While the pair of planetary gears 6 rotate around the axis of the second half-shaft gear 52, they drive the brake gear 12 to rotate accordingly. Since the brake gear 12 and the output half-shaft 7 are in a relative rotational fit relationship, while the brake gear 12 rotates, the output half-shaft 7 and the second half-shaft gear 52 can remain stationary. That is, the gear set forms an idle rotation. At this time, the power output shaft 10 is stationary.

[0045] like Figure 3 As shown, in the state of power output, the braking component of one unit of the gear set operates, and the brake element 15 of the unit brakes the brake wheel 14, so that the brake gear 12 and the intermediate transmission gear 13 are in a stationary state.

[0046] This unit becomes power output line 18, and the transmission sequence is as follows:

[0047] The sequence is as follows: Power input shaft 1 → Power input gear 2 → Connecting gear 3 → Half-shaft gear 1 51 → Planetary gear 6 → Half-shaft gear 2 52 → Output half-shaft 7 → Connecting gear 8 → Power output gear 9 → Power output shaft 10. Half-shaft gear 1 51 drives the two planetary gears 6 to rotate independently, while the two planetary gears 6 do not revolve around a central axis. This causes half-shaft gear 2 52 to rotate with its output half-shaft 7, resulting in coaxial and synchronous rotation of the input half-shaft 4 and the output half-shaft 7. This transmits rotational power to the output half-shaft 7. Through the meshing of connecting gear 8 and power output gear 9, the power output shaft 10 is driven to output torque.

[0048] The brake wheel 14 of the other units of the gear set does not brake, but rotates in a following manner. The input half shaft 4 and the output half shaft 7 of this unit will rotate relative to each other. The relative rotation activity is adapted by the revolution of the two planetary gears 6 (like a conventional differential), without affecting the transmission of the power output line 18.

[0049] As a preferred structural solution, the aforementioned brake component 15 is fixedly connected to the outer wall of the housing 16, the brake wheel 14 is located outside the housing 16, and the shaft of the series brake wheel 14 and the intermediate transmission gear 13 rotates through the housing 16.

[0050] The aforementioned brake component 15 and brake wheel 14 can also be located inside the housing 16, and there are other installation options. Regardless of the changes, they are all within the protection scope of this invention.

[0051] As an optimized process structure scheme (specifically not limited), the brake component 15 and the brake wheel 14 can be assembled in a closed box, which can be fixedly connected to the box shell 16.

[0052] To ensure transmission performance and save installation space, both the brake gear 12 and the intermediate transmission gear 13 are bevel gears, and are not limited to the gear types listed in this embodiment. Any selection of gears is within the protection scope of this invention.

[0053] To better ensure that the input half-shaft and output half-shaft 7 can rotate stably, both the input half-shaft 4 and the output half-shaft 7 are equipped with a rotating support seat 17. The input half-shaft 4 and the output half-shaft 7 are rotatably connected to the rotating support seat 17, and the rotating support seat 17 is fixedly connected to the inner wall of the housing shell 16.

[0054] This embodiment has the following advantages:

[0055] All gears mesh at their installation positions, transmitting different speeds through "alternating braking," thereby increasing the range of output torque. The structure is simple, the cost is low, and the gear shifting process can achieve seamless connection and fast shifting speed, among other technical requirements.

[0056] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In this invention, it should also be noted that the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through intermediate connecting parts. The specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gear transmission, comprising: Box shell (16); Rotate the power input shaft (1) and power output shaft (10) that pass through the housing (16). One end of the power input shaft (1) is connected to a rotary drive unit, and the other end of the power input shaft (1) is fixedly sleeved with a power input gear (2). The input end of the power output shaft (10) is fixedly sleeved with a power output gear (9). A gear set that is driven and engaged with the power input gear (2) and the power output gear (9); The characteristic feature is that the gear assembly is divided into several relatively independent units with different transmission ratios, each unit comprising: Input half shaft (4), the input half shaft (4) is fixedly fitted with an access gear (3) and a half shaft gear (51), the access gear (3) meshes with the power input gear (2); Output half shaft (7), the axis of the output half shaft (7) coincides with the axis of the input half shaft (4), the output half shaft (7) is fixedly fitted with an output gear (8) and a half shaft gear (52), the output gear (8) meshes with the power output gear (9); Braking gear (12) and braking assembly, wherein the braking gear (12) is coaxially rotatably sleeved on the output half shaft (7), and the braking assembly is connected to the housing (16) and is used to brake the braking gear (12) of the corresponding unit when the corresponding unit becomes the power output line (18); A pair of planetary gears (6), each planetary gear (6) is equipped with a gear seat (11), the planetary gear (6) is rotatably connected to the gear seat (11), the gear seat (11) is fixedly connected to the brake gear (12), and the first half-shaft gear (51), the pair of planetary gears (6), and the second half-shaft gear (52) mesh in sequence; Intermediate transmission gear (13) meshes with brake gear (12) and is braked by brake assembly; The braking assembly includes a brake wheel (14) and a brake element (15). The brake wheel (14) is coaxial with the intermediate transmission gear (13) and is controlled by the brake element (15). The brake element (15) is a disc brake controlled by an electronic control system.

2. The gearbox according to claim 1, characterized in that: The brake component (15) is fixedly connected to the outer wall of the housing (16), and the brake wheel (14) is located outside the housing (16). The shaft of the brake wheel (14) and the intermediate transmission gear (13) rotates through the housing (16).

3. A gearbox according to claim 1, characterized in that: Both the brake gear (12) and the intermediate transmission gear (13) are bevel gears.

4. A gearbox according to claim 1, characterized in that: Both the input half-shaft (4) and the output half-shaft (7) are equipped with rotating support seats (17). The input half-shaft (4) and the output half-shaft (7) are rotatably connected to the rotating support seats (17). The rotating support seats (17) are fixedly connected to the inner wall of the housing shell (16).

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