Wet brake steering drive axle for large-tonnage excavator

Abstract

The utility model discloses a wet brake steering drive axle for a large-tonnage excavator, which comprises an input shaft, a main reducer assembly and an axle housing assembly are arranged above the right side of the input shaft, an arbitrary rotation angle mechanism is arranged below the outer side of the axle housing assembly, and the arbitrary rotation angle mechanism comprises an oil cylinder, a steering pull rod and an oil pipe. According to the wet-type braking steering drive axle for the large-tonnage excavator, the lubricating mechanism is arranged, so that the half shaft can better provide stable power for the drive axle, meanwhile, the service life of the half shaft is greatly prolonged, and meanwhile, the noise reduction mechanism is arranged, so that the service life of the drive axle is prolonged. A traditional tapered tooth spiral bevel gear is replaced by an equal-height tooth spiral bevel gear, sound insulation cotton is further arranged, noise generated during gear operation can be greatly reduced, in addition, a mechanism with any rotation angle is arranged, and a steering pull rod, an oil cylinder and a steering knuckle component of a drive axle can be flexibly adjusted through the arrangement of a ball pin.

Description

Technical Field

[0001] The utility model relates to the technical field of drive axles, in particular to a wet brake steering drive axle used for large-tonnage excavators. Background Art

[0002] Wheeled excavators are flexible and easy to transfer, with high moving speed and adaptability, and are very suitable for working environments that require frequent moving tasks. The drive axle is the main component of the wheeled excavator chassis transmission, so the drive axle used for wheeled excavators is an important engineering component. In the existing drive axles for wheeled excavators, there are disadvantages such as small load bearing, low transmission efficiency, small output torque and small braking torque, which affect the driving performance and safety performance of the excavator. There are many kinds of wet brake steering drive axles for large tonnage excavators on the market, but there are still some disadvantages;

[0003] For example, in actual use, the wet brake steering drive axle generally used for large-tonnage excavators is responsible for outputting power to the outside through the drive axle. Generally, the drive axle gear set is a traditional tapered spiral bevel gear, which has the characteristics of low efficiency, high noise and low strength during operation. At the same time, the hydraulic oil brake half-shaft provides a large braking force for the drive axle. However, the half-shaft will wear out more after long-term use, which will cause the service life to be reduced. In addition, the steering rod of the general drive axle is not adjustable with the cylinder and the steering knuckle, and cannot meet the movement requirements in the steering movement. Therefore, we propose a wet brake steering drive axle for large-tonnage excavators to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a wet brake steering drive axle for large-tonnage excavators to solve the problem that the current wet brake steering drive axle for large-tonnage excavators proposed in the above-mentioned background technology is responsible for outputting power to the outside through the drive axle. Generally, the drive axle gear set is a traditional tapered spiral bevel gear, which has the characteristics of low efficiency, high noise and low strength during operation. At the same time, the hydraulic oil brake half-axle is used to provide a large braking force for the drive axle. However, the half-axle will wear more after long-term use, which will cause the service life to be reduced. In addition, the steering tie rod of the general drive axle is not adjustable with the oil cylinder and the steering knuckle, and cannot meet the movement requirements in the steering movement.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a wet brake steering drive axle for a large-tonnage excavator, comprising:

[0006] An input shaft, wherein a main reduction assembly is arranged on the upper right side of the input shaft;

[0007] Also includes:

[0008] A bridge housing assembly, wherein an arbitrary rotation angle mechanism is arranged at the lower outer side of the bridge housing assembly, wherein the arbitrary rotation angle mechanism comprises an oil cylinder, a steering tie rod and an oil pipe, a steering tie rod is arranged at the lower outer side of the bridge housing assembly, and the left side of the steering tie rod is rotationally connected to the steering knuckle, and the right side of the steering tie rod is rotationally installed with an oil cylinder, and the right side of the steering knuckle is connected to the bridge housing assembly;

[0009] A half-shaft is provided with a lubrication mechanism on the inner rear side of the half-shaft, wherein the lubrication mechanism includes an oil pipe, an oil outlet hole, a valve, an oil box, a heating wire, a pipeline and an oil inlet, an oil pipe is rotatably provided inside the half-shaft, and oil outlet holes are opened at equal distances inside the oil pipe, and an oil box is rotatably connected to the rear of the oil outlet hole, and a valve is provided on the inner rear side of the oil pipe.

[0010] Preferably, a differential assembly is disposed above the input shaft, and the input shaft connects the differential assembly and the half-shafts.

[0011] Preferably, sound-absorbing cotton is installed on the upper and lower sides of the left side of the main reduction assembly, and a buckle is provided on the outer side of the sound-absorbing cotton, and the buckle is engaged and connected with the inner wall of the drive axle.

[0012] Preferably, a wet brake assembly is arranged on the outside of the differential assembly.

[0013] Preferably, a heating wire is provided inside the oil box, and a pipeline is fixedly connected to the rear side of the middle part of the oil box, and an oil inlet is installed at the rear end of the pipeline.

[0014] Preferably, the outside of the half shaft is connected to a sun gear, and the end of the half shaft is connected to a wheel-side reducer, and the wheel-side reducer is fixedly connected to the wheel hub.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the wet brake steering drive axle for large-tonnage excavators can provide a smooth power to the drive axle by setting a lubrication mechanism, and greatly prolong the service life of the axle; a noise reduction mechanism is set, and the traditional tapered spiral bevel gear is replaced with an equal-height spiral bevel gear, and sound insulation cotton is also set, which can greatly reduce the noise when the gear is running; in addition, an arbitrary rotation angle mechanism is set, and a ball pin is set, so that the steering tie rod, oil cylinder and steering knuckle components of the drive axle can be flexibly adjusted;

[0016] 1. A main reducer assembly, sound-absorbing cotton and buckles are provided. The main reducer assembly is designed as a gear set driven by equal-height spiral bevel gears. Compared with the traditional tapered spiral bevel gears, it has the characteristics of high strength, low noise and high efficiency. At the same time, sound-absorbing cotton is installed on the upper and lower sides of the left side of the main reducer assembly. Buckles are provided on the outside of the sound-absorbing cotton. The buckles are engaged and connected with the inner wall of the driving wheel. The setting of the sound-absorbing cotton can also help the main reducer assembly reduce noise;

[0017] 2. An oil pipe, an oil outlet, a valve and an oil box are provided. An oil pipe is provided through the middle of the half shaft. An oil outlet is provided inside the oil pipe, and the rear side of the oil pipe is connected to the oil box. Lubricating oil is stored inside the oil box. At the same time, an electric heating wire is provided on the inner wall of the oil box. Turning on the electric heating wire can accelerate the circulation of the lubricating oil inside the oil box. Secondly, a valve is provided inside the oil pipe to control the circulation of the lubricating oil at any time. A pipeline is connected to the rear of the middle of the oil box. An oil inlet is provided at the rear end of the pipeline. The oil inlet is fixed by bolts. By unscrewing the bolts, lubricating oil can be transported from the oil inlet to the inside of the oil box through the connection of the pipeline. The lubricating oil drips into the inside of the half shaft through the oil outlet provided inside the oil pipe, so that the half shaft can better provide stable power for the drive axle, and at the same time greatly prolong the service life of the half shaft;

[0018] 3. A steering knuckle, oil cylinder and steering tie rod are provided. The oil cylinder and the steering knuckle are connected by the steering tie rod. Ball pins are used at both ends of the steering tie rod. They can rotate at any angle within a certain range to meet the movement requirements during the steering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0020] Figure 2 This is a perspective structural diagram of the sound-absorbing cotton and buckle connection of the utility model;

[0021] Figure 3 This is a schematic diagram of the top cross-sectional structure of the utility model;

[0022] Figure 4 It is a top view cross-sectional structural diagram of the connection among the valve, oil box and heating wire of the utility model.

[0023] In the figure: 1. Input shaft; 2. Main reduction assembly; 3. Steering knuckle; 4. Sound-absorbing cotton; 5. Buckle; 6. Differential assembly; 7. Wet brake assembly; 8. Cylinder; 9. Steering rod; 10. Bridge housing assembly; 11. Axle; 12. Oil pipe; 13. Oil outlet hole; 14. Valve; 15. Oil box; 16. Heating wire; 17. Pipeline; 18. Oil inlet; 19. Wheel hub; 20. Sun gear; 21. Wheel reducer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution: a wet brake steering drive axle for large-tonnage excavators, including: an input shaft 1, a main reduction assembly 2, a steering knuckle 3, a sound-absorbing cotton 4, a buckle 5, a differential assembly 6, a wet brake assembly 7, an oil cylinder 8, a steering tie rod 9, a bridge housing assembly 10, a half shaft 11, an oil pipe 12, an oil outlet hole 13, a valve 14, an oil box 15, a heating wire 16, a pipeline 17, an oil inlet 18, a wheel hub 19, a sun gear 20, and a wheel-side reducer 21;

[0026] like Figure 1 and Figure 2 As shown in the figure, the steering drive axle body is formed by the input shaft 1, the half shaft 11 and the wheel hub 19. The first stage reducer and the second stage reducer are respectively arranged between the input shaft 1, the half shaft 11 and the wheel hub 19. The second stage reducer is set as a planetary gear reducer and is arranged between the half shaft 11 and the wheel hub 19. Due to the design of the drive axle body, the first stage reducer and the second stage reducer, the rotation ratio of the input shaft 1 and the wheel hub 19 is increased through the two-stage reduction of the first stage reducer and the second stage reducer, and the rotation speed of the wheel hub 19 is reduced, thereby reducing the driving speed and increasing the output torque. The first stage reducer is set as the main reduction assembly 2, and the second stage reducer is set as the wheel side reducer 2 1. The drive axle body is configured to further include a three-section axle housing assembly 10 and a steering knuckle 3. The half shafts 11 are respectively arranged at the two end portions of the axle housing assembly 10, and a differential assembly 6 is arranged between the two half shafts 11. The input shaft 1 is configured to be connected to the half shafts 11 through the differential assembly 6. The end portion of the half shaft 11 is connected to the wheel side reducer 21, and the wheel side reducer 21 is configured to be connected to the wheel hub 19. The wheel hub 19 is rotatably connected to the steering knuckle 3 through a bearing, and the steering knuckle 3 is connected to the axle housing assembly 10. Secondly, one end of the half shaft 11 is processed into a sun gear 20, and the connection structure between the sun gear 20 and the half shaft 11 in the traditional drive axle is cancelled, thereby reducing the volume of the sun gear 20 and making the wheel side structure more compact.

[0027] The main reducer assembly 2 is designed as a gear set driven by an equal-height spiral bevel gear, which has the characteristics of high strength, low noise and high efficiency compared with the traditional tapered spiral bevel gear. At the same time, sound-absorbing cotton 4 is installed on the upper and lower sides of the left side of the main reducer assembly 2, and a buckle 5 is arranged on the outside of the sound-absorbing cotton 4. The buckle 5 is engaged with the inner wall of the driving wheel. The setting of the sound-absorbing cotton 4 can also help the main reducer assembly 2 reduce noise;

[0028] like Figure 2 and Figure 4As shown in the figure, the wet brake assembly 7 is normally open and is a three-section bridge housing. The hydraulic oil is passed into the brake half shaft 11 to obtain a large braking force. The setting of the wet brake assembly 7 can prevent the entry of external mud and dust, avoid the influence of harsh environment, have large braking force, long service life, and stable braking effect. The half shaft 11 will wear out greatly after long-term use, that is, an oil pipe 12 is set in the middle of the half shaft 11, and an oil outlet hole 13 is opened inside the oil pipe 12, and the rear side of the oil pipe 12 is connected to the oil box 15, and the oil box 15 has stored lubricating oil inside. At the same time, the inner wall of the oil box 15 is provided with a heating wire 16 to heat the electric The hot wire 16 is opened to accelerate the circulation of the lubricating oil in the oil box 15. Secondly, a valve 14 is arranged inside the oil pipe 12 to control the circulation of the lubricating oil at any time. A pipe 17 is connected to the rear of the middle part of the oil box 15. An oil inlet 18 is arranged at the rear end of the pipe 17. The oil inlet 18 is fixed by bolts. The lubricating oil can be transported from the oil inlet 18 to the inside of the oil box 15 through the connection of the pipe 17 by unscrewing the bolts. The lubricating oil drips into the inside of the half shaft 11 through the oil outlet 13 arranged inside the oil pipe 12, so that the half shaft 11 can better provide stable power for the drive axle, and at the same time greatly prolong the service life of the half shaft 11.

[0029] like Figure 1 and Figure 3 As shown in the figure, the oil cylinder 8 and the steering knuckle 3 are connected by the steering tie rod 9. The two ends of the steering tie rod 9 are designed with ball pins, which can be rotated at any angle within a certain range to meet the movement requirements during the steering process. The working route is as follows: the main engine power torque is transmitted from the input flange, and after being decelerated and differentially driven by the main reduction assembly 2, the power is transmitted to the wheel side reducer 21 through the half shaft 11. After being decelerated by the wheel side reducer 21, the power is finally transmitted to the wheel hub 19, thereby driving the tire to roll forward.

[0030] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wet brake steering drive axle for a large-tonnage excavator, comprising: An input shaft (1), wherein a main reduction assembly (2) is arranged above the right side of the input shaft (1); It is characterized by further comprising: A bridge housing assembly (10), wherein an arbitrary rotation angle mechanism is arranged at the lower outer side of the bridge housing assembly (10), wherein the arbitrary rotation angle mechanism comprises an oil cylinder (8), a steering tie rod (9) and an oil pipe (12), wherein a steering tie rod (9) is arranged at the lower outer side of the bridge housing assembly (10), and the left side of the steering tie rod (9) is rotationally connected to the steering knuckle (3), and the right side of the steering tie rod (9) is rotationally mounted with the oil cylinder (8), and the right side of the steering knuckle (3) is connected to the bridge housing assembly (10); A half shaft (11), wherein a lubrication mechanism is arranged at the inner rear side of the half shaft (11), wherein the lubrication mechanism comprises an oil pipe (12), an oil outlet hole (13), a valve (14), an oil box (15), an electric heating wire (16), a pipeline (17) and an oil inlet (18); an oil pipe (12) is rotatably arranged inside the half shaft (11), and the oil outlet holes (13) are arranged at equal distances inside the oil pipe (12), and the rear of the oil outlet hole (13) is rotatably connected to the oil box (15), and a valve (14) is arranged at the inner rear side of the oil pipe (12).

2. A wet brake steering drive axle for a large tonnage excavator according to claim 1, characterized in that: A differential assembly (6) is arranged above the input shaft (1), and the input shaft (1) is connected to the differential assembly (6) and the half shaft (11).

3. A wet brake steering drive axle for a large tonnage excavator according to claim 1, characterized in that: Sound-absorbing cotton (4) is installed on the upper and lower sides of the left side of the main reduction assembly (2), and a buckle (5) is arranged on the outer side of the sound-absorbing cotton (4), and the buckle (5) is snap-fitted and connected with the inner wall of the drive axle.

4. A wet brake steering drive axle for a large tonnage excavator according to claim 2, characterized in that: A wet brake assembly (7) is arranged outside the differential assembly (6).

5. The wet brake steering drive axle for a large tonnage excavator according to claim 1, characterized in that: The oil box (15) is provided with an electric heating wire (16) inside, and a pipeline (17) is fixedly connected to the rear side of the middle part of the oil box (15), and an oil inlet (18) is installed at the rear end of the pipeline (17).

6. A wet brake steering drive axle for a large tonnage excavator according to claim 2, characterized in that: The outside of the half shaft (11) is connected to a sun gear (20), and the end of the half shaft (11) is connected to a wheel-side reducer (21), and the wheel-side reducer (21) is fixedly connected to the wheel hub (19).

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