Transmission system and engineering machine

Abstract

The application belongs to the technical field of engineering machinery, and particularly relates to a transmission system and engineering machinery. The transmission system comprises multiple motors, a gearbox, a steering and braking mechanism and a final transmission mechanism, the multiple motors are formed into several groups in pairs, the gearbox comprises an input assembly and a gear shifting assembly, the input assembly comprises several input gears and a merging gear, the several groups of motors are connected in one-to-one correspondence with the several input gears, the several input gears are all engaged with the merging gear, the merging gear is connected with an input end of the gear shifting assembly, an input end of the steering and braking mechanism is connected with an output end of the gear shifting assembly, an input end of the final transmission mechanism is connected with an output end of the steering and braking mechanism, and an output end of the final transmission mechanism is used for being connected with a wheel. The power transmission path is motor-gearbox-steering and braking mechanism-final transmission mechanism, the power transmission path is short, the transmission efficiency is high, the overall structure is compact, the number of parts is small, the assembly and manufacturing are simple, and the cost is low.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a transmission system and engineering machinery. Background Technology

[0002] Currently, only a small number of small and medium-tonnage bulldozers use electric drive systems in their transmission systems, while the transmission systems of extra-large bulldozers with a capacity of 100 tons are still mainly driven by engines. The transmission route is: engine → torque converter → gearbox → central drive → steering and braking system → final drive, etc. The engine converts thermal energy into mechanical energy, which is then transmitted to the final drive after torque conversion and speed change. The transmission route of the transmission system is long, the transmission efficiency is low, and the overall structure of the transmission system is large, the structure of each component is complex, assembly and manufacturing are difficult, and the overall cost is high. Summary of the Invention

[0003] The purpose of this invention is to provide a transmission system and engineering machinery that has a short power transmission path, high transmission efficiency, compact overall structure, few parts, simple assembly and manufacturing, and low cost.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] The transmission system includes:

[0006] Multiple motors are grouped in pairs to form several groups;

[0007] The gearbox includes an input component and a transmission component. The input component includes a plurality of input gears and a confluence gear. A plurality of motors are connected to the plurality of input gears in a one-to-one correspondence. All of the plurality of input gears mesh with the confluence gears. The confluence gears are connected to the input end of the transmission component.

[0008] The steering braking mechanism has its input end connected to the output end of the transmission assembly;

[0009] The final drive mechanism has its input end connected to the output end of the steering and braking mechanism, and its output end is used to connect to the wheel.

[0010] As a preferred technical solution for the transmission system, the number of motors is four, and the four motors are arranged in pairs to form two groups. The number of input gears is two, and the two groups of motors are connected to the two input gears in a one-to-one correspondence.

[0011] As a preferred technical solution for the transmission system, the transmission component includes a low-speed gear and a high-speed gear.

[0012] As a preferred technical solution for the transmission system, the transmission assembly includes a first gear, a second gear, a third gear, a fourth gear, a low-speed clutch, and a high-speed clutch. The first gear meshes with the converging gear. The input end of the low-speed clutch is connected to the first gear. The first gear meshes with the second gear. The input end of the high-speed clutch is connected to the second gear. The output end of the low-speed clutch is connected to the third gear. The output end of the high-speed clutch is connected to the fourth gear. The third gear meshes with the fourth gear. The fourth gear is connected to the input end of the steering and braking mechanism.

[0013] As a preferred technical solution for the transmission system, the first gear is provided with a secondary gear, which meshes with the second gear.

[0014] As a preferred technical solution for the transmission system, the steering braking mechanism includes a left steering braking mechanism and a right steering braking mechanism. Both the left steering braking mechanism and the right steering braking mechanism include a steering clutch and a braking clutch. The input end of the steering clutch of the left steering braking mechanism and the input end of the steering clutch of the right steering braking mechanism are connected to the output end of the transmission assembly. The output end of the steering clutch is fixedly connected to the input end of the corresponding braking clutch. The output end of the braking clutch is connected to the input end of the final drive mechanism.

[0015] As a preferred technical solution for the transmission system, the steering clutch is normally closed and the braking clutch is normally open.

[0016] As a preferred technical solution for the transmission system, the final drive mechanism includes a left final drive mechanism and a right final drive mechanism. Both the left and right final drive mechanisms include a gear pair and a planetary gear set. The gear pair includes a fifth gear and a sixth gear. The fifth gear of the left final drive mechanism is connected to the output end of the left steering brake mechanism, and the fifth gear of the right final drive mechanism is connected to the output end of the right steering brake mechanism. The fifth gear meshes with the corresponding sixth gear, and the sixth gear is connected to the input component of the corresponding planetary gear set. The output component of the planetary gear set is used to connect with the corresponding wheel.

[0017] As a preferred technical solution for the transmission system, the planetary gear assembly includes a first planetary gear and a second planetary gear connected in series. The first planetary gear includes a first sun gear, a first planet gear, a first planet carrier, and a first ring gear. The second planetary gear includes a second sun gear, a second planet gear, a second planet carrier, and a second ring gear. The first sun gear is connected to the sixth gear, the first planet carrier is connected to the second sun gear, and the second planet carrier is used to connect to the wheel.

[0018] Construction machinery includes wheels and a transmission system as described in any of the above embodiments, wherein the final drive mechanism of the transmission system is connected to the wheels.

[0019] The beneficial effects of this invention are:

[0020] The transmission system provided by this invention includes multiple motors, a gearbox, a steering and braking mechanism, and a final drive mechanism. The multiple motors are grouped in pairs to form several groups. The gearbox includes an input component and a transmission component. The input component includes several input gears and a merging gear. Each group of motors is connected to one of the input gears, and all input gears mesh with the merging gears, which are connected to the input end of the transmission component. The input end of the steering and braking mechanism is connected to the output end of the transmission component. The input end of the final drive mechanism is connected to the output end of the steering and braking mechanism, and the output end of the final drive mechanism is used to connect to the wheels. Power is transmitted from the motors to the gearbox, then from the gearbox to the steering and braking mechanism, then from the steering and braking mechanism to the final drive mechanism, and finally from the final drive mechanism to the wheels, thus enabling the engineering machinery to move. This system features a short power transmission path, high transmission efficiency, a compact overall structure, fewer parts, simple assembly and manufacturing, and low cost. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the transmission system provided in an embodiment of the present invention.

[0022] In the picture:

[0023] 10. Motor; 21. Input assembly; 211. Input gear; 212. Converging gear; 22. Transmission assembly; 221. First gear; 2211. Secondary gear; 222. Second gear; 223. Third gear; 224. Fourth gear; 225. Low-speed clutch; 226. High-speed clutch; 30a. Left steering brake mechanism; 30b. Right steering brake mechanism; 31. Steering clutch; 32. Braking clutch; 40a. Left final drive mechanism; 40b. Right final drive mechanism; 41. Fifth gear; 42. Sixth gear; 431. First sun gear; 432. First planet gear; 433. First planet carrier; 434. First ring gear; 441. Second sun gear; 442. Second planet gear; 443. Second planet carrier; 444. Second ring gear. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0025] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0028] like Figure 1 As shown, this embodiment of the invention provides a transmission system including multiple motors 10, a gearbox, a steering and braking mechanism, and a final drive mechanism. The multiple motors 10 are grouped in pairs to form several groups. The gearbox includes an input component 21 and a transmission component 22. The input component 21 includes several input gears 211 and a converging gear 212. Each group of motors 10 is connected to one of the input gears 211, and each input gear 211 meshes with a converging gear 212. The converging gear 212 is connected to the input end of the transmission component 22. The input end of the steering and braking mechanism is connected to the output end of the transmission component 22. The input end of the final drive mechanism is connected to the output end of the steering and braking mechanism, and the output end of the final drive mechanism is used to connect to the wheels. Power is transmitted from the motors 10 to the gearbox, then from the gearbox to the steering and braking mechanism, then from the steering and braking mechanism to the final drive mechanism, and finally from the final drive mechanism to the wheels, thereby enabling the construction machinery to move. The power transmission path is short, the transmission efficiency is high, and the overall structure is compact with few parts, simple assembly and manufacturing, and low cost.

[0029] In this embodiment, there are four motors 10, arranged in pairs to form two groups. There are two input gears 211, with each group of motors 10 connected to one of the two input gears 211. Using four motors 10 to provide power ensures sufficient power while facilitating arrangement. In other embodiments, the number of motors 10 may be less than or more than four, for example, two or six, and is not limited to this embodiment.

[0030] In this embodiment, the transmission assembly 22 is a two-speed transmission, including a low-speed gear and a high-speed gear. In other embodiments, the transmission assembly 22 may also be a three-speed or four-speed transmission, etc., and is not limited to this embodiment.

[0031] In this embodiment, the transmission assembly 22 includes a first gear 221, a second gear 222, a third gear 223, a fourth gear 224, a low-speed clutch 225, and a high-speed clutch 226. The first gear 221 meshes with the converging gear 212. The input end of the low-speed clutch 225 is connected to the first gear 221, and the first gear 221 meshes with the second gear 222. The input end of the high-speed clutch 226 is connected to the second gear 222. The output end of the low-speed clutch 225 is connected to the third gear 223, and the output end of the high-speed clutch 226 is connected to the fourth gear 224. The third gear 223 meshes with the fourth gear 224, and the fourth gear 224 is connected to the input end of the steering and braking mechanism. When the low-speed clutch 225 is engaged and the high-speed clutch 226 is disengaged, the power of the converging gear 212 is transmitted to the input end of the steering brake mechanism via the first gear 221, the low-speed clutch 225, the third gear 223, and the fourth gear 224. When the high-speed clutch 226 is engaged and the low-speed clutch 225 is disengaged, the power of the converging gear 212 is transmitted to the input end of the steering brake mechanism via the first gear 221, the second gear 222, the high-speed clutch 226, and the fourth gear 224. Optionally, a secondary gear 2211 is provided on the first gear 221, which meshes with the second gear 222, thereby facilitating the engagement between the first gear 221 and the second gear 222.

[0032] In this embodiment, the steering braking mechanism includes a left steering braking mechanism 30a and a right steering braking mechanism 30b. Both the left steering braking mechanism 30a and the right steering braking mechanism 30b include a steering clutch 31 and a braking clutch 32. The input ends of the steering clutch 31 of the left steering braking mechanism 30a and the right steering braking mechanism 30b are connected to the fourth gear 224 of the transmission assembly 22. The output end of the steering clutch 31 is fixedly connected to the input end of the corresponding braking clutch 32, and the output end of the braking clutch 32 is connected to the input end of the final drive mechanism. Optionally, the steering clutch 31 is normally closed, and the braking clutch 32 is normally open. When a left turn is required, the steering clutch 31 of the left steering braking mechanism 30a is disengaged, while the steering clutch 31 of the right steering braking mechanism 30b remains closed; when a right turn is required, the steering clutch 31 of the right steering braking mechanism 30b is disengaged, while the steering clutch 31 of the left steering braking mechanism 30a remains closed; when braking is required, both the braking clutch 32 of the left steering braking mechanism 30a and the braking clutch 32 of the right steering braking mechanism 30b are closed.

[0033] In this embodiment, the final drive mechanism includes a left final drive mechanism 40a and a right final drive mechanism 40b. Both the left final drive mechanism 40a and the right final drive mechanism 40b include a gear pair and a planetary gear set assembly. The gear pair includes a fifth gear 41 and a sixth gear 42. The fifth gear 41 of the left final drive mechanism 40a is connected to the output end of the left steering brake mechanism 30a, and the fifth gear 41 of the right final drive mechanism 40b is connected to the output end of the right steering brake mechanism 30b. The fifth gear 41 meshes with the corresponding sixth gear 42, and the sixth gear 42 is connected to the input of the corresponding planetary gear set assembly. The output of the planetary gear set assembly is used to connect with the corresponding wheel.

[0034] Optionally, the planetary gear set assembly includes a first planetary gear set and a second planetary gear set connected in series. The first planetary gear set includes a first sun gear 431, a first planet gear 432, a first planet carrier 433, and a first ring gear 434. The second planetary gear set includes a second sun gear 441, a second planet gear 442, a second planet carrier 443, and a second ring gear 444. The first sun gear 431 is connected to a sixth gear 42, the first planet carrier 433 is connected to the second sun gear 441, and the second planet carrier 443 is used to connect to the wheel. Both the first ring gear 434 and the second ring gear 444 are fixed. The power of the fourth gear 224 is transmitted to the wheel sequentially through the fifth gear 41, the sixth gear 42, the first sun gear 431, the first planet gear 432, the first planet carrier 433, the second sun gear 441, the second planet gear 442, and the second planet carrier 443. Alternatively, the planetary gear set assembly may also include only one planetary gear set or three or more planetary gear sets connected in series, and is not limited to this embodiment.

[0035] The present invention also provides an engineering machine, including wheels and the aforementioned transmission system, wherein the final drive mechanism of the transmission system is connected to the wheels. By employing the aforementioned transmission system, the power transmission path can be shortened and the transmission efficiency improved. In this embodiment, the engineering machine is a bulldozer. In other embodiments, the engineering machine may also be a loader or a dump truck, etc.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A transmission system characterised in that, The utility model relates to a kind of electric vehicle drive system, comprising: Multiple motors (10), form several groups two by two in a group; Gearbox, including input component (21) and gear component (22), the input component (21) includes several input gears (211) and bus gear (212), several groups of the motor (10) are connected with several the input gears (211) one by one, several the input gears (211) are all engaged with the bus gear (212), the bus gear (212) is connected with the input end of the gear component (22); Steering brake mechanism, its input end is connected with the output end of the gear component (22); Final drive mechanism, its input end is connected with the output end of the steering brake mechanism, and its output end is used to be connected with wheel; The number of the motor (10) is four, two groups of the motor (10) are formed two by two in a group, the number of the input gear (211) is two, two the motor (10) are connected with two the input gears (211) one by one; The gear component (22) includes low speed gear and high speed gear; The gear component (22) includes first gear (221), second gear (222), third gear (223), fourth gear (224), low speed gear clutch (225) and high speed gear clutch (226), the first gear (221) is engaged with the bus gear (212), the input end of the low speed gear clutch (225) is connected with the first gear (221), the first gear (221) is engaged with the second gear (222), the input end of the high speed gear clutch (226) is connected with the second gear (222);The output end of the low speed gear clutch (225) is connected with the third gear (223), the output end of the high speed gear clutch (226) is connected with the fourth gear (224), the third gear (223) is engaged with the fourth gear (224), the fourth gear (224) is connected with the input end of the steering brake mechanism; The steering brake mechanism includes left steering brake mechanism (30a) and right steering brake mechanism (30b), the left steering brake mechanism (30a) and the right steering brake mechanism (30b) are connected with the output end of the gear component (22) with the input end of the steering clutch (31) of the left steering brake mechanism (30a) and the input end of the steering clutch (31) of the right steering brake mechanism (30b), the output end of the steering clutch (31) is fixedly connected with the input end of corresponding brake clutch (32), the output end of the brake clutch (32) is connected with the input end of the final drive mechanism.

2. The transmission system of claim 1, wherein, Sub-gear (2211) is arranged on the first gear (221), and the sub-gear (2211) is engaged with the second gear (222).

3. The transmission system of claim 1, wherein, The steering clutch (31) is normally closed, and the brake clutch (32) is normally open.

4. The transmission system of claim 1, wherein, The final transmission mechanism comprises a left final transmission mechanism (40a) and a right final transmission mechanism (40b), the left final transmission mechanism (40a) and the right final transmission mechanism (40b) each comprise a gear pair and a planetary gear set assembly, the gear pair comprises a fifth gear (41) and a sixth gear (42), the fifth gear (41) of the left final transmission mechanism (40a) is connected with the output end of the left steering brake mechanism (30a), the fifth gear (41) of the right final transmission mechanism (40b) is connected with the output end of the right steering brake mechanism (30b), the fifth gear (41) is engaged with the corresponding sixth gear (42), the sixth gear (42) is connected with the input of the corresponding planetary gear set assembly, and the output of the planetary gear set assembly is used to be connected with the corresponding wheel.

5. The transmission system of claim 4, wherein, The planetary gear set assembly comprises a first planetary gear set and a second planetary gear set connected in series, the first planetary gear set comprises a first sun gear (431), a first planet gear (432), a first planet carrier (433) and a first ring gear (434), the second planetary gear set comprises a second sun gear (441), a second planet gear (442), a second planet carrier (443) and a second ring gear (444), the first sun gear (431) is connected with the sixth gear (42), the first planet carrier (433) is connected with the second sun gear (441), and the second planet carrier (443) is used to be connected with the wheel.

6. A working machine, characterised in that A wheel and a transmission system as claimed in any one of claims 1-5, the final transmission mechanism of the transmission system being connected with the wheel.

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