Transmission system and engineering machinery

Abstract

The invention belongs to the technical field of engineering machinery, and particularly relates to a transmission system and engineering machinery. The transmission system comprises a plurality of motors, a gearbox, a steering brake mechanism and a final transmission mechanism, and every two motors form a group to form a plurality of groups; the gearbox comprises an input assembly and a speed change assembly, the input assembly comprises a plurality of input gears and a convergence gear, the motors are connected with the input gears in a one-to-one correspondence mode, the input gears are meshed with the convergence gear, and the convergence gear is connected with the input end of the speed change assembly. The input end of the steering brake mechanism is connected with the output end of the speed change assembly; the input end of the final transmission mechanism is connected with the output end of the steering brake mechanism, and the output end of the final transmission mechanism is used for being connected with wheels. A power transmission path is a motor-gearbox-steering brake 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, assembling and manufacturing are easy, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a transmission system and engineering machinery. Background Art

[0002] Among the existing bulldozers, only a small number of small and medium-sized bulldozers use electric drive systems, while the transmission system of large bulldozers of 100 tons is still mainly driven by the engine. The transmission route is: engine → torque converter → gearbox → central drive → steering, braking system → final drive, etc. The engine converts thermal energy into mechanical energy, which is finally transmitted to the final drive after torque and speed changes. 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, the assembly and manufacturing are difficult, and the overall cost is high. Summary of the invention

[0003] The object of the present invention is to provide a transmission system and engineering machinery with a short power transmission path, high transmission efficiency, compact overall structure, small number of parts, simple assembly and manufacturing, and low cost.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Transmission system, including:

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

[0007] A gearbox, comprising an input assembly and a speed change assembly, wherein the input assembly comprises a plurality of input gears and a converging gear, wherein a plurality of groups of the motors are connected to a plurality of the input gears in a one-to-one correspondence, wherein the plurality of the input gears are all meshed with the converging gears, and the converging gears are connected to the input end of the speed change assembly;

[0008] A steering brake mechanism, the input end of which is connected to the output end of the speed change assembly;

[0009] The final transmission mechanism has an input end connected to the output end of the steering brake mechanism, and an output end used to connect to the wheels.

[0010] As a preferred technical solution for the transmission system, the number of the motors is four, and the four motors are grouped in pairs to form two groups. The number of the 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 of the transmission system, the speed change assembly includes a low speed gear and a high speed gear.

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

[0013] As a preferred technical solution of the transmission system, a sub-gear is arranged on the first gear, and the sub-gear is meshed with the second gear.

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

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

[0016] As a preferred technical solution of the transmission system, the final drive mechanism includes a left final drive mechanism and a right final drive mechanism, both of which include a gear pair and a planetary row assembly, 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, the fifth gear of the right final drive mechanism is connected to the output end of the right steering brake mechanism, the fifth gear is meshed with the corresponding sixth gear, the sixth gear is connected to the corresponding input member of the planetary row assembly, and the output member of the planetary row assembly is used to be connected to the corresponding wheel.

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

[0018] An engineering machine comprises wheels and a transmission system as described in any of the above schemes, wherein the final drive mechanism of the transmission system is connected to the wheels.

[0019] Beneficial effects of the present invention:

[0020] The transmission system provided by the present invention includes multiple motors, a gearbox, a steering brake mechanism and a final drive mechanism, wherein multiple motors are grouped in pairs to form several groups; the gearbox includes an input assembly and a speed change assembly, the input assembly includes several input gears and a converging gear, several groups of motors are connected to several input gears in a one-to-one correspondence, several input gears are all meshed with the converging gears, and the converging gears are connected to the input end of the speed change assembly; the input end of the steering brake mechanism is connected to the output end of the speed change assembly; the input end of the final drive mechanism is connected to the output end of the steering brake mechanism, and the output end of the final drive mechanism is used to connect to the wheels. Power is transmitted from the motor to the gearbox, then from the gearbox to the steering brake mechanism, then from the steering brake mechanism to the final drive mechanism, and finally from the final drive mechanism to the wheels, thereby realizing the walking function of the engineering machinery, with a short power transmission path, high transmission efficiency, compact overall structure, small number of parts, simple assembly and manufacturing, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the principle of a transmission system provided by an embodiment of the present invention.

[0022] In the figure:

[0023] 10. Motor; 21. Input assembly; 211. Input gear; 212. Converging gear; 22. Speed ​​change assembly; 221. First gear; 2211. Sub-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 planetary gear; 433. First planetary carrier; 434. First ring gear; 441. Second sun gear; 442. Second planetary gear; 443. Second planetary carrier; 444. Second ring gear. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] like Figure 1 As shown, the embodiment of the present invention provides a transmission system, including multiple motors 10, a gearbox, a steering brake mechanism and a final drive mechanism, wherein multiple motors 10 are grouped in pairs to form a plurality of groups; the gearbox includes an input assembly 21 and a speed change assembly 22, the input assembly 21 includes a plurality of input gears 211 and a converging gear 212, a plurality of groups of motors 10 are connected to a plurality of input gears 211 in a one-to-one correspondence, a plurality of input gears 211 are all meshed with the converging gears 212, and the converging gears 212 are connected to the input end of the speed change assembly 22; the input end of the steering brake mechanism is connected to the output end of the speed change assembly 22; the input end of the final drive mechanism is connected to the output end of the steering brake mechanism, and the output end of the final drive mechanism is used to connect to the wheels. The power is transmitted from the motor 10 to the gearbox, then from the gearbox to the steering brake mechanism, then from the steering brake mechanism to the final drive mechanism, and finally from the final drive mechanism to the wheels, thereby realizing the walking function of the engineering machinery, with a short power transmission path, high transmission efficiency, compact overall structure, small number of parts, simple assembly and manufacturing, and low cost.

[0029] In this embodiment, the number of motors 10 is four, and the four motors 10 are grouped in pairs to form two groups. The number of input gears 211 is two, and the two groups of motors 10 are connected to the two input gears 211 in a one-to-one correspondence. Providing power through four motors 10 can ensure that the power meets the demand and facilitate layout. In other embodiments, the number of motors 10 can also be less than four or more than four, for example, it can be two or six, and is not limited to this embodiment.

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

[0031] In this embodiment, the speed change 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 is meshed with the converging gear 212, the input end of the low-speed clutch 225 is connected to the first gear 221, the first gear 221 is meshed with the second gear 222, and 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, the output end of the high-speed clutch 226 is connected to the fourth gear 224, the third gear 223 is meshed with the fourth gear 224, and the fourth gear 224 is connected to the input end of the steering brake mechanism. When the low-speed gear clutch 225 is closed and the high-speed gear clutch 226 is disconnected, 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 gear clutch 225, the third gear 223 and the fourth gear 224; when the high-speed gear clutch 226 is closed and the low-speed gear clutch 225 is disconnected, 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 gear clutch 226 and the fourth gear 224. Optionally, a sub-gear 2211 is provided on the first gear 221, and the sub-gear 2211 is meshed with the second gear 222, so that the cooperation between the first gear 221 and the second gear 222 is more convenient.

[0032] In this embodiment, the steering brake mechanism includes a left steering brake mechanism 30a and a right steering brake mechanism 30b, and the left steering brake mechanism 30a and the right steering brake mechanism 30b both include a steering clutch 31 and a brake clutch 32. 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 are both connected to the fourth gear 224 of the speed change assembly 22, and the output end of the steering clutch 31 is fixedly connected to the input end of the corresponding brake clutch 32, and the output end of the brake clutch 32 is connected to the input end of the final drive mechanism. Optionally, the steering clutch 31 is a normally closed type, and the brake clutch 32 is a normally open type. When a left turn is required, the steering clutch 31 of the left steering brake mechanism 30a is disconnected, and the steering clutch 31 of the right steering brake mechanism 30b is kept closed; when a right turn is required, the steering clutch 31 of the right steering brake mechanism 30b is disconnected, and the steering clutch 31 of the left steering brake mechanism 30a is kept closed; when braking is required, the brake clutch 32 of the left steering brake mechanism 30a and the brake clutch 32 of the right steering brake mechanism 30b are both closed.

[0033] In this embodiment, the final drive mechanism includes a left final drive mechanism 40a and a right final drive mechanism 40b, and the left final drive mechanism 40a and the right final drive mechanism 40b both include a gear pair and a planetary gear 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 is meshed with the corresponding sixth gear 42, and the sixth gear 42 is connected to the input member of the corresponding planetary gear assembly. The output member of the planetary gear assembly is used to be connected to the corresponding wheel.

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

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

[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 embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A transmission system, characterized in that: include: A plurality of motors (10) are arranged in groups of two to form a plurality of groups; A gearbox, comprising an input component (21) and a speed change component (22), wherein the input component (21) comprises a plurality of input gears (211) and a converging gear (212), wherein a plurality of groups of motors (10) are connected to a plurality of input gears (211) in a one-to-one correspondence, wherein the plurality of input gears (211) are all meshed with the converging gears (212), and the converging gears (212) are connected to an input end of the speed change component (22); A steering brake mechanism, the input end of which is connected to the output end of the speed change assembly (22); The final transmission mechanism has an input end connected to the output end of the steering brake mechanism, and an output end used to connect to the wheels.

2. The transmission system according to claim 1, characterized in that: The number of the motors (10) is four, and the four motors (10) are grouped in pairs to form two groups. The number of the input gears (211) is two, and the two groups of motors (10) are connected to the two input gears (211) in a one-to-one correspondence.

3. The transmission system according to claim 1, characterized in that: The speed change assembly (22) comprises a low speed gear and a high speed gear.

4. The transmission system according to claim 3, characterized in that: The speed change assembly (22) comprises a first gear (221), a second gear (222), a third gear (223), a fourth gear (224), a low-speed gear clutch (225) and a high-speed gear clutch (226); the first gear (221) is meshed with the converging gear (212); the input end of the low-speed gear clutch (225) is connected to the first gear (221); the first gear (221) is meshed with the second gear (222); the input end of the high-speed gear clutch (226) is connected to the second gear (222); the output end of the low-speed gear clutch (225) is connected to the third gear (223); the output end of the high-speed gear clutch (226) is connected to the fourth gear (224); the third gear (223) is meshed with the fourth gear (224); the fourth gear (224) is connected to the input end of the steering brake mechanism.

5. The transmission system according to claim 4, characterized in that: The first gear (221) is provided with a sub-gear (2211), and the sub-gear (2211) is meshed with the second gear (222).

6. The transmission system according to claim 1, characterized in that: The steering brake mechanism comprises a left steering brake mechanism (30a) and a right steering brake mechanism (30b), and the left steering brake mechanism (30a) and the right steering brake mechanism (30b) both comprise a steering clutch (31) and a brake clutch (32), and 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) are both connected to the output end of the speed change assembly (22), the output end of the steering clutch (31) is fixedly connected to the corresponding input end of the brake clutch (32), and the output end of the brake clutch (32) is connected to the input end of the final drive mechanism.

7. The transmission system according to claim 6, characterized in that: The steering clutch (31) is of a normally closed type, and the brake clutch (32) is of a normally open type.

8. The transmission system according to claim 6, characterized in that: The final drive mechanism comprises a left final drive mechanism (40a) and a right final drive mechanism (40b), each of which comprises a gear pair and a planetary gear assembly, wherein the gear pair comprises a fifth gear (41) and a sixth gear (42), wherein 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), and the fifth gear (41) is meshed with the corresponding sixth gear (42), and the sixth gear (42) is connected to the corresponding input member of the planetary gear assembly, and the output member of the planetary gear assembly is used to be connected to the corresponding wheel.

9. The transmission system according to claim 8, characterized in that: The planetary row assembly comprises a first planetary row and a second planetary row connected in series, wherein the first planetary row comprises a first sun gear (431), a first planetary gear (432), a first planetary carrier (433) and a first ring gear (434), and the second planetary row comprises a second sun gear (441), a second planetary gear (442), a second planetary carrier (443) and a second ring gear (444), wherein the first sun gear (431) is connected to the sixth gear (42), the first planetary carrier (433) is connected to the second sun gear (441), and the second planetary carrier (443) is used to be connected to a wheel.

10. Construction machinery, characterized in that: The invention comprises a wheel and a transmission system as claimed in any one of claims 1 to 9, wherein a final drive mechanism of the transmission system is connected to the wheel.

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