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 first transmission module and a second transmission module, and each of the first transmission module and the second transmission module comprises a motor, a gearbox, a brake mechanism and a final transmission mechanism. Power of the first transmission module is transmitted to a gearbox through a motor of the first transmission module, then transmitted to a brake shaft through the gearbox, transmitted to a final transmission mechanism through the brake shaft and finally transmitted to a corresponding wheel edge device through the final transmission mechanism, and power of the second transmission module is transmitted to the gearbox through a motor of the second transmission module and then transmitted to the brake shaft through the gearbox. Therefore, the walking function of the engineering machinery is achieved, 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 transmission → 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] The transmission system comprises a first transmission module and a second transmission module, wherein the first transmission module and the second transmission module both comprise:

[0006] Motor;

[0007] A gearbox, comprising an input assembly and a speed change assembly, wherein the input assembly comprises an input gear, a confluence gear and a confluence gear shaft, the motor is connected to the input gear, the input gear is meshed with the confluence gear, the confluence gear is fixedly sleeved on the confluence gear shaft, and the confluence gear shaft is connected to the input end of the speed change assembly;

[0008] A brake mechanism, comprising a brake shaft and a brake clutch, wherein the brake shaft is connected to the output end of the speed change assembly, and the brake clutch is arranged on the brake shaft;

[0009] The final transmission mechanism has an input end connected to the brake shaft and an output end connected to the wheel side device.

[0010] As a preferred technical solution of the transmission system, the converging gear shaft has a center hole, and the brake shaft passes through the center hole.

[0011] As a preferred technical solution of the transmission system, the first transmission module and the second transmission module each include two motors and two input gears, the two motors are connected to the two input gears in a one-to-one correspondence, and the two input gears are meshed with the converging gears.

[0012] As a preferred technical solution of the transmission system, the speed change assembly includes a first planetary gear, which includes a first sun gear, a first planetary gear, a first planetary carrier and a first ring gear. The first sun gear is connected to the convergence gear shaft, and the first planetary carrier is fixedly connected to the brake shaft.

[0013] As an optimal technical solution for the transmission system, the final drive mechanism includes a second planetary row and a third planetary row, the second planetary row includes a second sun gear, a second planetary gear, a second planetary carrier and a second ring gear, the third planetary row includes a third sun gear, a third planetary gear, a third planetary carrier and a third ring gear, the second sun gear is connected to the brake shaft, the second planetary carrier is connected to the third sun gear, and the third planetary carrier is used to be connected to the wheel side device.

[0014] As a preferred technical solution of the transmission system, the second gear ring and the third gear ring are connected by a connecting member, and the connecting member is fixedly arranged.

[0015] As a preferred technical solution of the transmission system, the third planet carrier is rotatably connected to the connecting member via a bearing.

[0016] As a preferred technical solution of the transmission system, the connecting member has a recessed portion, and the bearing is located in the recessed portion.

[0017] As a preferred technical solution of the transmission system, the brake clutch is a normally open clutch.

[0018] The engineering machinery comprises a first wheel side device, a second wheel side device and the transmission system described in any of the above schemes, wherein the final transmission mechanism of the first transmission module is connected to the first wheel side device, and the final transmission mechanism of the second transmission module is connected to the second wheel side device.

[0019] Beneficial effects of the present invention:

[0020] The transmission system provided by the present invention includes a first transmission module and a second transmission module, and the first transmission module and the second transmission module both include a motor, a gearbox, a braking mechanism and a final transmission mechanism. The gearbox includes an input component and a speed change component, and the input component includes an input gear, a converging gear and a converging gear shaft. The motor is connected to the input gear, and the input gear is meshed with the converging gear. The converging gear is fixedly sleeved on the converging gear shaft, and the converging gear shaft is connected to the input end of the speed change component; the braking mechanism includes a brake shaft and a brake clutch, and the brake shaft is connected to the output end of the speed change component, and the brake clutch is arranged on the brake shaft; the input end of the final transmission mechanism is connected to the brake shaft, and the output end of the final transmission mechanism is used to be connected to the corresponding wheel side device. The power of the first transmission module is transmitted from its motor to the gearbox, and then from the gearbox to the brake shaft, and then from the brake shaft to the final drive mechanism, and finally from the final drive mechanism to the corresponding wheel side device. The power of the second transmission module is transmitted from its motor to the gearbox, and then from the gearbox to the brake shaft, and then from the brake shaft to the final drive mechanism, and finally from the final drive mechanism to the corresponding wheel side device, 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 is a schematic diagram of the principle of a transmission system provided by an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the principle of the first transmission module involved in the embodiment of the present invention.

[0023] In the figure:

[0024] 1. First transmission module; 2. Second transmission module;

[0025] 10. Motor; 21. Input assembly; 211. Input gear; 212. Input shaft; 213. First bearing; 214. Converging gear; 215. Converging gear shaft; 216. Second bearing; 22. Speed ​​change assembly; 221. First sun gear; 222. First planetary gear; 223. First planetary carrier; 224. First ring gear; 30. Braking mechanism; 31. Braking shaft; 32. Third bearing; 33. Braking clutch; 40. Final drive mechanism; 411. Second sun gear; 412. Second planetary gear; 413. Second planetary carrier; 414. Second ring gear; 421. Third sun gear; 422. Third planetary gear; 423. Third planetary carrier; 424. Third ring gear; 43. Connecting piece; 431. Recess; 44. Fourth bearing. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a transmission system, including a first transmission module 1 and a second transmission module 2. The first transmission module 1 and the second transmission module 2 have the same structure. The first transmission module 1 and the second transmission module 2 both include a motor 10, a gearbox, a brake mechanism 30, and a final transmission mechanism 40. The gearbox includes an input assembly 21 and a speed change assembly 22. The input assembly 21 includes an input gear 211, a converging gear 214, and a converging gear shaft 215. The motor 10 is connected to the input gear 211 through an input shaft 212. The input shaft 212 is supported and rotated by a first bearing 213. The input The gear 211 is meshed with the converging gear 214, and the converging gear 214 is fixedly sleeved on the converging gear shaft 215. The converging gear shaft 215 is supported for rotation by the second bearing 216, and the converging gear shaft 215 is connected to the input end of the speed change assembly 22; the braking mechanism 30 includes a brake shaft 31 and a brake clutch 33, the brake shaft 31 is supported for rotation by the third bearing 32, the brake shaft 31 is connected to the output end of the speed change assembly 22, and the brake clutch 33 is arranged on the brake shaft 31; the input end of the final drive mechanism 40 is connected to the brake shaft 31, and the output end of the final drive mechanism 40 is used to be connected to the corresponding wheel side device.

[0031] The power of the first transmission module 1 is transmitted from its motor 10 to the gearbox, and then from the gearbox to the brake shaft 31, and then from the brake shaft 31 to the final transmission mechanism 40, and finally from the final transmission mechanism 40 to the corresponding wheel side device. The power of the second transmission module 2 is transmitted from its motor 10 to the gearbox, and then from the gearbox to the brake shaft 31, and then from the brake shaft 31 to the final transmission mechanism 40, and finally from the final transmission mechanism 40 to the corresponding wheel side device, 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.

[0032] In this embodiment, the brake clutch 33 is a normally open clutch. When the engineering machinery needs to turn in the first direction, the brake clutch 33 of the first transmission module 1 is closed, the brake shaft 31 of the first transmission module 1 is fixed by the brake clutch 33, the power of the gearbox of the first transmission module 1 can no longer be transmitted to the final transmission mechanism 40 through the brake shaft 31, the brake clutch 33 of the second transmission module 2 remains disconnected, and the power of the second transmission module 2 can be normally transmitted to the final transmission mechanism 40, thereby realizing the turning of the engineering machinery in the first direction; when the engineering machinery needs to turn in the second direction, the brake clutch 33 of the second transmission module 2 is closed, the brake shaft 31 of the second transmission module 2 is fixed by the brake clutch 33, the power of the gearbox of the second transmission module 2 can no longer be transmitted to the final transmission mechanism 40 through the brake shaft 31, the brake clutch 33 of the first transmission module 1 remains disconnected, and the power of the first transmission module 1 can be normally transmitted to the final transmission mechanism 40, thereby realizing the turning of the engineering machinery in the second direction. When the engineering machinery needs to brake, the brake clutch 33 of the first transmission module 1 and the brake clutch 33 of the second transmission module 2 are both closed.

[0033] In this embodiment, the converging gear shaft 215 has a central hole, and the brake shaft 31 passes through the central hole, so that the overall structure is more compact.

[0034] In this embodiment, the first transmission module 1 and the second transmission module 2 each include two motors 10 and two input gears 211, the two motors 10 are connected to the two input gears 211 in a one-to-one correspondence, and the two input gears 211 are meshed with the converging gear 214. Each transmission module is powered by two motors 10, which can meet the power requirements of a 100-ton super-large bulldozer and other engineering machinery, and can also replace the function of a high-power motor 10 with a plurality of low-power motors 10, solving the problems of difficult selection of high-power motors 10, high technical difficulty in development, high cost, low power density utilization, and large assembly space requirements.

[0035] In this embodiment, the speed change assembly 22 includes a first planetary row, and the first planetary row includes a first sun gear 221, a first planetary gear 222, a first planetary carrier 223 and a first ring gear 224. The first sun gear 221 is the input end of the first planetary row, and the first sun gear 221 is connected to the converging gear shaft 215. The first planetary carrier 223 is the output end of the first planetary row. The first planetary carrier 223 is fixedly connected to the brake shaft 31, and the first ring gear 224 is fixedly arranged. In other embodiments, the speed change assembly 22 can also include two or more planetary rows connected in series, or a gear pair and at least one planetary row can be connected in series.

[0036] In this embodiment, the final transmission mechanism 40 includes a second planetary row and a third planetary row, the second planetary row includes a second sun gear 411, a second planetary gear 412, a second planetary carrier 413 and a second ring gear 414, the third planetary row includes a third sun gear 421, a third planetary gear 422, a third planetary carrier 423 and a third ring gear 424, the second sun gear 411 is the input end of the final transmission mechanism 40, the second sun gear 411 is connected to the brake shaft 31, the second planetary carrier 413 is connected to the third sun gear 421, the third planetary carrier 423 is the output end of the final transmission mechanism 40, the third planetary carrier 423 is used to be connected to the wheel side device, and the second ring gear 414 and the third ring gear 424 are both fixed. The final transmission mechanism 40 is designed as a two-stage planetary reduction structure to achieve the function of speed reduction and torque increase, and the two-stage planetary reduction structure has the advantages of large speed reduction transmission ratio, large output torque and wide speed reduction range. In other embodiments, the final transmission mechanism 40 can also include one planetary row, or can also include three or more planetary rows connected in series.

[0037] In this embodiment, the second gear ring 414 and the third gear ring 424 are connected by the connecting member 43, and the connecting member 43 is fixedly arranged, that is, the second gear ring 414 and the third gear ring 424 are first connected as a whole by the connecting member 43, and then the second gear ring 414 and the third gear ring 424 are fixed at the same time by fixing the connecting member 43, which simplifies the fixing method of the second gear ring 414 and the third gear ring 424. Further, the third planetary carrier 423 is rotatably connected to the connecting member 43 by the fourth bearing 44, which improves the stability of the planetary carrier rotation. Furthermore, the connecting member 43 has a recessed portion 431, and the second bearing 216 is located in the recessed portion 431, which improves the compactness of the overall structure.

[0038] The final drive mechanism 40 can adopt a high-position drive installation and driving method to ensure the height of the motor 10 from the ground, improve the reliability of the motor 10, improve the passability of the entire machine, reduce the probability of the final drive mechanism 40 being hit by foreign objects, and improve the reliability of the final drive mechanism 40.

[0039] The specific power transmission path of the first transmission module 1 and the second transmission module 2 provided in the embodiment of the present invention is: motor 10-input gear 211-convergence gear 214-convergence gear shaft 215-first sun gear 221-first planetary gear 222-first planetary carrier 223-brake shaft 31-second sun gear 411-second planetary gear 412-second planetary carrier 413-third sun gear 421-third planetary gear 422-third planetary carrier 423-wheel side device.

[0040] The embodiment of the present invention further provides an engineering machine, comprising a first wheel side device, a second wheel side device and the above-mentioned transmission system, wherein the final transmission mechanism 40 of the first transmission module 1 is connected to the first wheel side device, and the final transmission mechanism 40 of the second transmission module 2 is connected to the second wheel side device. By adopting the above-mentioned 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.

[0041] 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: The invention comprises a first transmission module (1) and a second transmission module (2), wherein the first transmission module (1) and the second transmission module (2) both comprise: Motor (10); A gearbox, comprising an input component (21) and a speed change component (22), wherein the input component (21) comprises an input gear (211), a converging gear (214) and a converging gear shaft (215), the motor (10) is connected to the input gear (211), the input gear (211) is meshed with the converging gear (214), the converging gear (214) is fixedly sleeved on the converging gear shaft (215), and the converging gear shaft (215) is connected to the input end of the speed change component (22); A brake mechanism (30) comprising a brake shaft (31) and a brake clutch (33), wherein the brake shaft (31) is connected to an output end of the speed change assembly (22), and the brake clutch (33) is arranged on the brake shaft (31); The final transmission mechanism (40) has an input end connected to the brake shaft (31) and an output end connected to a wheel side device.

2. The transmission system according to claim 1, characterized in that: The converging gear shaft (215) has a central hole, and the brake shaft (31) passes through the central hole.

3. The transmission system according to claim 1, characterized in that: The first transmission module (1) and the second transmission module (2) each comprise two motors (10) and two input gears (211); the two motors (10) are connected to the two input gears (211) in a one-to-one correspondence; and the two input gears (211) are meshed with the converging gear (214).

4. The transmission system according to claim 1, characterized in that: The speed change assembly (22) comprises a first planetary gear, which comprises a first sun gear (221), a first planetary gear (222), a first planetary carrier (223) and a first ring gear (224). The first sun gear (221) is connected to the converging gear shaft (215), and the first planetary carrier (223) is fixedly connected to the brake shaft (31).

5. The transmission system according to claim 1, characterized in that: The final drive mechanism (40) includes a second planetary row and a third planetary row, wherein the second planetary row includes a second sun gear (411), a second planetary gear (412), a second planetary carrier (413) and a second ring gear (414), and the third planetary row includes a third sun gear (421), a third planetary gear (422), a third planetary carrier (423) and a third ring gear (424), wherein the second sun gear (411) is connected to the brake shaft (31), the second planetary carrier (413) is connected to the third sun gear (421), and the third planetary carrier (423) is used to be connected to a wheel side device.

6. The transmission system according to claim 5, characterized in that: The second gear ring (414) and the third gear ring (424) are connected via a connecting member (43), and the connecting member (43) is fixedly arranged.

7. The transmission system according to claim 6, characterized in that: The third planet carrier (423) is rotatably connected to the connecting member (43) via a bearing.

8. The transmission system according to claim 7, characterized in that: The connecting member (43) has a recessed portion (431), and the bearing is located in the recessed portion (431).

9. The transmission system according to any one of claims 1 to 8, characterized in that: The brake clutch (33) is a normally open clutch.

10. Construction machinery, characterized in that: It comprises a first wheel side device, a second wheel side device and a transmission system as described in any one of claims 1 to 9, wherein the final transmission mechanism (40) of the first transmission module (1) is connected to the first wheel side device, and the final transmission mechanism (40) of the second transmission module (2) is connected to the second wheel side device.

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