Gearbox of loading system of pure electric loading machine

Abstract

The invention discloses a pure electric loader loading system gearbox which comprises a gearbox rear shell, a motor front shell, an output assembly and an input assembly, the gearbox rear shell abuts against the motor front shell, the gearbox rear shell is connected with the motor front shell through a box closing bolt, and the output assembly is connected with the input assembly through a box closing bolt. A cavity is formed between the gearbox rear shell and the motor front shell, and the output assembly and the input assembly are both located in the cavity between the gearbox rear shell and the motor front shell. By arranging the output assembly, when the output assembly works, power is transmitted to the first spline shaft and the second spline shaft from the motor and then transmitted to the gear pump from the first spline shaft and the second spline shaft, the process is single, loss in the power transmission process can be reduced, and therefore the working efficiency can be improved. The gearbox rear shell is fixedly connected with the motor front shell, so that the motor and the gearbox can be integrated, the integrated structure can be simplified, the axial distance can be shortened, and the mounting space and the manufacturing cost can be saved.

Description

Technical Field

[0001] The present invention relates to the technical field of loader gearboxes, and in particular to a gearbox for a mounting system of a pure electric loader. Background Art

[0002] A loader is a kind of earthwork construction machinery widely used in construction projects such as roads, railways, buildings, hydropower, ports, and mines. It is mainly used to shovel and load bulk materials such as soil, sand, lime, coal, etc. It can also do light shoveling operations on ore, hard soil, etc. By replacing different auxiliary working devices, it can also perform bulldozing, lifting, and loading and unloading operations of other materials such as wood. Common loaders are fuel loaders. With the continuous increase in energy consumption, energy conservation and emission reduction have become one of the most urgent problems to be solved in China today. As fuel loaders are large-emission machines, energy conservation and emission reduction are an inevitable trend, so pure electric loaders came into being.

[0003] The main components of a loader include the engine, torque converter, gearbox and front and rear drive axles. The gearbox is a mechanism used to change the speed and torque from the engine. It can fix or change the transmission ratio of the output shaft and the input shaft in shifts, and is one of the core transmission components of the loader.

[0004] However, since pure electric loaders are in their infancy in China, they generally use the original gearbox assembly, and there is no suitable gearbox for electric loaders. Therefore, the existing pure electric loaders have complex structures, high costs and low working efficiency. Summary of the invention

[0005] The object of the present invention is to provide a gearbox for a mounting system of a pure electric loader, which can solve the problems of complex structure, high cost and low working efficiency of the pure electric loader.

[0006] To achieve the above-mentioned purpose, a pure electric loader upper system gearbox is provided, which includes: a gearbox rear housing, a motor front housing, an output assembly and an input assembly, the gearbox rear housing abuts against the motor front housing, the gearbox rear housing and the motor front housing are connected by bolts, a cavity is provided between the gearbox rear housing and the motor front housing, and the output assembly and the input assembly are both located in the cavity between the gearbox rear housing and the motor front housing; the output assembly includes a front bearing, a rear bearing, a first spline shaft and a second spline shaft, one end of the first spline shaft and the second spline shaft are both provided with a front bearing, the front bearing is fixedly connected to the motor front housing, and the other end of the first spline shaft and the second spline shaft are both provided with a rear bearing , the rear bearing is fixedly connected to the rear housing of the gearbox, and the first spline shaft and the second spline shaft are both meshed with the gear on the motor shaft; the input assembly includes a motor shaft, a first bearing and a first pressure plate, a third gear is provided on the motor shaft, the first gear and the second gear are both meshed with the third gear, the first bearing is located at the end of the motor shaft, the first bearing is fixedly connected to the front housing of the motor, a first pressure plate and a spacer are provided on the side of the first bearing opposite to the front housing of the motor, the first pressure plate and the spacer are both annular, the first pressure plate is fixedly connected to the front housing of the motor by a first bolt, the spacer is arranged at intervals in the first pressure plate, a retaining ring is clamped on the motor shaft, and the spacer is located between the retaining ring and the first bearing.

[0007] The working principle and beneficial effects of the present invention are as follows: when installing the gearbox, the output assembly and the input assembly are installed at appropriate positions, and then the gearbox rear housing is installed on the motor front housing using the box bolts, so that the gearbox and the motor are fixedly connected, and then the gearbox and the motor are fixedly installed on the frame of the loader through an external suspension device; the first spline shaft and the second spline shaft are respectively connected to the corresponding gear pumps, and when the motor is working, the motor can drive the gearbox to work, specifically, the motor shaft rotates, and the motor shaft drives the first spline shaft and the second spline shaft to rotate through the corresponding gears, and the first spline shaft rotates and the second spline shaft respectively drives the corresponding gear pumps to rotate, and when the gear pump rotates, it can provide power for the loader; the spacer, the snap ring and the first pressure plate can limit the first bearing;

[0008] By setting the output assembly, when it is working, the power is transmitted from the motor to the first spline shaft and the second spline shaft, and then from the first spline shaft and the second spline shaft to the gear pump. This process is relatively simple, which can reduce the loss in the power transmission process, thereby improving the working efficiency. By setting the rear housing of the gearbox and the front housing of the motor to be fixedly connected, the motor and the gearbox can be integrated into one, which can simplify the integrated structure, shorten the axial distance, and save installation space and manufacturing costs.

[0009] According to the pure electric loader upper mounting system gearbox, an oil seal is provided between the motor front housing and the gearbox rear housing.

[0010] The oil seal is arranged in the gap between the rear housing of the gearbox and the front housing of the motor. By arranging the oil seal, the gap between the rear housing of the gearbox and the front housing of the motor can be filled to ensure the sealing of the inner cavity, prevent the inner cavity of the rear housing of the gearbox from contacting with the outside air, and prevent the lubricating oil in the gearbox from leaking.

[0011] According to the gearbox of the upper mounting system of a pure electric loader, an oil overflow hole is opened on the side of the rear housing of the gearbox, and an oil filling screw plug is arranged in the oil overflow hole.

[0012] By setting the oil overflow hole, lubricating oil can be added into the gearbox through the oil overflow hole, and the condition of the lubricating oil in the gearbox can be observed through the oil overflow hole when refueling; by setting the oil filling bolt, the oil overflow hole can be opened conveniently to add lubricating oil, and the oil overflow hole can be blocked after refueling to ensure the sealing of the gearbox.

[0013] According to the gearbox of the upper mounting system of a pure electric loader, an oil drain hole is arranged at the bottom of the rear housing of the gearbox, and an oil drain plug assembly is arranged in the oil drain hole.

[0014] The oil drain hole and the oil drain bolt assembly are provided to facilitate replacement of the lubricating oil in the gearbox.

[0015] According to the gearbox of the upper mounting system of a pure electric loader, the gearbox rear housing is provided with a locating pin.

[0016] By setting the positioning pin, it plays a positioning role when installing the gearbox.

[0017] According to the pure electric loader upper mounting system gearbox, a normally closed vent plug is provided on the top of the gearbox rear housing.

[0018] By providing a normally closed vent plug, air circulation inside the gearbox can be ensured, and the air pressure inside the gearbox can be ensured to be consistent with the air pressure outside, thereby avoiding danger caused by the inconsistency between the air pressure inside the gearbox and the air pressure outside.

[0019] According to the pure electric loader upper system gearbox, a water cooling pipe is provided at the bottom of the gearbox rear housing.

[0020] The water cooling pipe can be connected to the water cooling system of the loader vehicle. By setting the water cooling pipe, the local temperature of the gearbox can be reduced, the speed at which the gearbox heats up during operation can be slowed down, and the service life of the mechanical parts can be increased.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0023] Figure 1 The figure is a cross-sectional view of a gearbox of a pure electric loader upper loading system.

[0024] Figure 2 The figure is a front view of a gearbox of a pure electric loader upper loading system.

[0025] Among them: 1. gearbox rear housing; 101. assembly bolts; 2. motor front housing; 3. output assembly; 301. front bearing; 302. rear bearing; 303. first spline shaft; 304. second spline shaft; 4. input assembly; 401. motor shaft; 402. first bearing; 403. first pressure plate; 404. first bolt; 405. spacer; 406. retaining ring; 5. oil seal; 6. oil filling plug; 7. oil drain plug assembly; 8. positioning pin; 9. normally closed vent plug; 10. water cooling pipe. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figure 1-Figure 2A pure electric loader upper system gearbox of the present invention comprises: a gearbox rear housing 1, a motor front housing 2, an output assembly 3 and an input assembly 4, wherein the gearbox rear housing 1 abuts against the motor front housing 2, and the gearbox rear housing 1 and the motor front housing 2 are connected by a box bolt 101, and a cavity is provided between the gearbox rear housing 1 and the motor front housing 2, and the output assembly 3 and the input assembly 4 are both located in the cavity between the gearbox rear housing 1 and the motor front housing 2; the output assembly 3 comprises a front bearing 301, a rear bearing 302, a first spline shaft 303 and a second spline shaft 304, one end of the first spline shaft 303 and the second spline shaft 304 are both provided with a front bearing 301, and the front bearing 301 is fixedly connected to the motor front housing 2, and the other ends of the first spline shaft 303 and the second spline shaft 304 are both provided with a rear bearing 302, and the rear bearing 302 is fixedly connected to the gearbox rear housing The first spline shaft 303 and the second spline shaft 304 are both meshed with the gear on the motor shaft 5; the input assembly 4 includes a motor shaft 401, a first bearing 402 and a first pressure plate 403, the motor shaft 401 is provided with a third gear, the first gear and the second gear are both meshed with the third gear, the first bearing 402 is located at the end of the motor shaft 401, the first bearing 402 is fixedly connected to the motor front housing 2 by a first bolt 404, the first bearing 402 is provided with a first pressure plate 403 and a spacer 405 on the side opposite to the motor front housing 2, the first pressure plate 403 and the spacer 405 are both annular, the first pressure plate 403 is fixedly connected to the motor front housing 2, the spacer 405 is arranged at intervals in the first pressure plate 403, a retaining ring 406 is clamped on the motor shaft 401, and the spacer 405 is located between the retaining ring 406 and the first bearing 402.

[0031] Specifically, when installing the gearbox, install the output assembly 3 and the input assembly 4 at appropriate positions, then use the box bolts 101 to install the gearbox rear housing 1 on the motor front housing 2, so that the gearbox and the motor are fixedly connected, and then the gearbox and the motor are fixedly installed on the frame of the loader through an external suspension device; the first spline shaft 303 and the second spline shaft 304 are respectively connected to the corresponding gear pumps. When the motor is working, the motor can drive the gearbox to work. Specifically, the motor shaft 5 rotates, and the motor shaft 5 drives the first spline shaft 303 and the second spline shaft 304 to rotate through the corresponding gears. When the first spline shaft 303 rotates and the second spline shaft 304 rotates, they respectively drive the corresponding gear pumps to rotate, and when the gear pump rotates, it can provide power for the loader; the spacer 405, the retaining ring 406 and the first pressure plate 403 can limit the first bearing 402.

[0032] Optionally, an oil seal 5 is provided between the motor front housing 2 and the gearbox rear housing 1 .

[0033] Optionally, an oil overflow hole is opened on the side of the rear housing 1 of the gearbox, and an oil filling screw plug 6 is arranged in the oil overflow hole.

[0034] Optionally, an oil drain hole is provided at the bottom of the gearbox rear housing 1, and an oil drain plug assembly 7 is provided in the oil drain hole.

[0035] Optionally, the gearbox rear housing 1 is provided with a positioning pin 8.

[0036] Optionally, a normally closed vent plug 9 is provided on the top of the gearbox rear housing 1.

[0037] Optionally, a water cooling pipe 10 is provided at the bottom of the gearbox rear housing 1 .

[0038] Specifically, when installing the gearbox, install the output assembly 3 and the input assembly 4 at appropriate positions, then use the box bolts 101 to install the gearbox rear housing 1 on the motor front housing 2, so that the gearbox and the motor are fixedly connected, and then the gearbox and the motor are fixedly installed on the frame of the loader through an external suspension device; the first spline shaft 303 and the second spline shaft 304 are respectively connected to the corresponding gear pumps. When the motor is working, the motor can drive the gearbox to work. Specifically, the motor shaft 5 rotates, and the motor shaft 5 drives the first spline shaft 303 and the second spline shaft 304 to rotate through the corresponding gears, and the first spline shaft 303 rotates When the second spline shaft 304 rotates, the corresponding gear pump can be driven to rotate, and when the gear pump rotates, it can provide power for the loader. In this process, the water cooling pipe 10 and the water cooling system of the loader vehicle work synchronously, and the local temperature of the gearbox can be reduced through the water cooling pipe 10; the spacer 405, the retaining ring 406 and the first pressure plate 403 can limit the first bearing 402; when performing daily maintenance on the gearbox, an oil overflow hole can be set to add lubricating oil to the gearbox through the oil overflow hole; a normally closed vent plug 9 can be set to ensure air circulation inside the gearbox and ensure that the air pressure inside the gearbox is consistent with the external air pressure.

[0039] When the loader is moving or the gearbox is vibrated by external forces, the lubricating oil in the gearbox may splash due to the vibration, and the splashing lubricating oil may lubricate the front bearing 301, the rear bearing 302, the first bearing 402 and the oil seal 5 in the gearbox.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A gearbox for a pure electric loader upper system, characterized in that: include: A gearbox rear housing, a motor front housing, an output assembly and an input assembly, wherein the gearbox rear housing abuts against the motor front housing, the gearbox rear housing and the motor front housing are connected by bolts, a cavity is provided between the gearbox rear housing and the motor front housing, and the output assembly and the input assembly are both located in the cavity between the gearbox rear housing and the motor front housing; The output assembly includes a front bearing, a rear bearing, a first spline shaft and a second spline shaft, one end of each of the first spline shaft and the second spline shaft is provided with a front bearing, the front bearing is fixedly connected to the front housing of the motor, the other end of each of the first spline shaft and the second spline shaft is provided with a rear bearing, the rear bearing is fixedly connected to the rear housing of the gearbox, and the first spline shaft and the second spline shaft are both meshed with the gear on the motor shaft; The input assembly includes a motor shaft, a first bearing and a first pressure plate. A third gear is arranged on the motor shaft. The first gear and the second gear are both meshed with the third gear. The first bearing is located at the end of the motor shaft. The first bearing is fixedly connected to the front housing of the motor. A first pressure plate and a spacer are arranged on the side of the first bearing opposite to the front housing of the motor. The first pressure plate and the spacer are both annular. The first pressure plate is fixedly connected to the front housing of the motor by a first bolt. The spacer is arranged in the first pressure plate at intervals. A retaining ring is clamped on the motor shaft. The spacer is located between the retaining ring and the first bearing.

2. A pure electric loader upper system gearbox according to claim 1, characterized in that: An oil seal is arranged between the front housing of the motor and the rear housing of the gearbox.

3. The gearbox of the upper loading system of a pure electric loader according to claim 1, characterized in that: An oil overflow hole is provided on the side of the rear housing of the gearbox, and an oil filling screw plug is arranged in the oil overflow hole.

4. The gearbox of the upper loading system of a pure electric loader according to claim 1, characterized in that: An oil drain hole is arranged at the bottom of the rear housing of the gearbox, and an oil drain screw plug assembly is arranged in the oil drain hole.

5. The gearbox of the upper loading system of a pure electric loader according to claim 1, characterized in that: The gearbox rear housing is provided with a positioning pin.

6. The gearbox of the upper loading system of a pure electric loader according to claim 1, characterized in that: A normally closed vent plug is arranged on the top of the gearbox rear housing.

7. The gearbox of the upper mounting system of a pure electric loader according to claim 1, characterized in that: A water cooling pipe is arranged at the bottom of the rear housing of the gearbox.

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