Full-hydraulic drive loader with cab capable of following steering

Abstract

The utility model discloses a full-hydraulic drive loader with a cab capable of following steering, and belongs to the field of engineering machinery. The loader comprises a front axle assembly, a rear axle assembly, a steering oil cylinder, a cab assembly, a hydraulic driving assembly, a fuel tank, a hydraulic oil tank and a hydraulic control system, the front axle assembly is hinged to the rear axle assembly, the steering oil cylinder is arranged between the front axle assembly and the rear axle assembly, and the cab assembly and the front axle assembly are assembled into a whole. The hydraulic driving assembly comprises an engine, a hydraulic pump and a hydraulic motor, the engine is in transmission connection with the hydraulic pump, and the hydraulic pump is connected with the hydraulic motor through a hydraulic control system; a steering wheel is arranged in the cab assembly, a steering column of the steering wheel is connected with a hydraulic steering gear, and the hydraulic steering gear is connected with the steering oil cylinder through a hydraulic loop. According to the loader, the cab can rotate along with the front axle in a hinged mode, the visual field is better, and operation is safe and flexible; and full-hydraulic driving is adopted, the structural compactness of the loader is guaranteed, hydraulic driving power is higher, reliability and flexibility are better, overload protection can be achieved, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to a loader, in particular to a full hydraulic drive loader with a cab following the steering. Background Art

[0002] Traditional loaders are widely used in various engineering construction and operation scenarios, for example, loading and unloading and transporting materials on construction sites, assisting in laying materials in road construction, handling ore and waste in mining, etc. With the continuous expansion of the scale and types of modern engineering and the increasing requirements of operations, the demand for efficient, flexible and reliable loaders is increasing rapidly. Loaders are required to be able to adapt to various operating conditions, not only to meet the needs of engineering construction, but also to be used in other unconventional operations with different operating attachments, and to adapt to various complex working environments.

[0003] The steering systems of existing loaders generally adopt articulated steering, front axle wheel steering and rear axle wheel steering. Different steering systems have different structural and functional characteristics. However, no matter which steering system is adopted, the cab of the loader is generally installed on the side of the non-steering rear axle to facilitate the setting of various transmission mechanisms. However, the disadvantages of this type of loader are also very obvious. The main reason is that the working device at the front end of the loader easily blocks the view of the cab when turning, causing the driver to be unable to see the road conditions in time, which is not conducive to operational safety.

[0004] In addition, the power source of existing loaders is mainly an internal combustion engine (such as a diesel engine, etc.), which needs to be used in conjunction with a transmission mechanism such as a reduction gearbox, resulting in a bloated structure of the loader, reduced working flexibility, large working vibration, and poor driving comfort. Summary of the invention

[0005] 1. Technical problems to be solved by the utility model

[0006] The purpose of the utility model is to overcome the above-mentioned shortcomings of the existing loaders and provide a fully hydraulically driven loader with a cab following the steering. By adopting the technical solution of the utility model, the front and rear axles of the loader adopt an articulated steering design controlled by a steering cylinder, and the cab assembly and the front axle assembly are assembled into a whole. The cab can follow the front axle to rotate in an articulated manner, which provides a better field of vision and safer and more flexible operation. Moreover, the walking and steering actions of the loader are fully hydraulically driven, which is convenient for the layout of the mechanical structure and is conducive to ensuring the compactness of the loader structure. In addition, the hydraulic drive has stronger power, better reliability and flexibility, can achieve overload protection, and has a longer service life.

[0007] 2. Technical solution

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0009] A full-hydraulic drive loader with cab following steering of the utility model includes a front axle assembly, a rear axle assembly, a steering cylinder and a cab assembly. The front axle assembly has front wheels, the rear axle assembly has rear wheels. The front axle assembly and the rear axle assembly are connected in a hinged form. The steering cylinder is arranged between the front axle assembly and the rear axle assembly and is used to control the relative movement of the front axle assembly and the rear axle assembly around the hinge point. It also includes a hydraulic drive assembly, a fuel tank, a hydraulic oil tank and a hydraulic control system. The cab assembly and the front axle assembly are assembled into a whole. The hydraulic drive assembly is installed on the front axle assembly and is located below the rear side of the cab assembly. The fuel tank, the hydraulic oil tank and the hydraulic control system are respectively integrated on the front axle assembly. The hydraulic drive assembly includes an engine, a hydraulic pump and a hydraulic motor. The engine is drivingly connected with the hydraulic pump. The hydraulic pump is connected with the hydraulic motor through the hydraulic control system. The hydraulic motor is drivingly connected with the front wheels and / or the rear wheels. A steering wheel is arranged in the cab assembly. The steering column of the steering wheel is connected with a hydraulic steering gear. The hydraulic steering gear is connected with the steering cylinder through a hydraulic circuit.

[0010] Further, the front axle assembly and the rear axle assembly are rotationally connected through a hinge shaft. A steering swing arm is arranged at a position of the rear axle assembly close to the hinge shaft. One end of the steering cylinder is hinged with the front axle assembly, and the other end of the steering cylinder is hinged with the steering swing arm.

[0011] Further, the fuel tank is located on one side of the cab assembly, and the hydraulic oil tank is located on the other side of the cab assembly.

[0012] Further, the fuel tank is located at the left rear side of the cab assembly, and a cab entrance and exit is left at the front side of the fuel tank.

[0013] Further, the hydraulic oil tank is located on the right side of the cab assembly and serves as the right side baffle of the cab.

[0014] Further, it also includes a working device for hooking attachments. The working device is installed at the front part of the front axle assembly.

[0015] Furthermore, the working device includes a lifting cylinder, a lower lifting rod, an upper lifting rod, a mounting frame, an accessory mounting plate and an angle adjustment cylinder, one end of the lower lifting rod is hinged to the front axle assembly at a hinge point A, and the other end is hinged to the mounting frame at a hinge point B, one end of the upper lifting rod is hinged to the front axle assembly at a hinge point D, and the other end is hinged to the mounting frame at a hinge point C, hinge point A, hinge point B, hinge point C and hinge point D form a parallelogram structure, one end of the lifting cylinder is hinged to the front axle assembly, and the other end is hinged to the lower lifting rod or the upper lifting rod, the accessory mounting plate is rotatably installed at the front end of the mounting frame, one end of the angle adjustment cylinder is hinged to the mounting frame, and the other end is hinged to the accessory mounting plate.

[0016] Furthermore, a covering member is provided on the front axle assembly.

[0017] 3. Beneficial effects

[0018] Compared with the existing known technologies, the technical solution provided by the utility model has the following beneficial effects:

[0019] (1) The utility model is a fully hydraulically driven loader with a cab following the steering, which includes a front axle assembly, a rear axle assembly, a steering cylinder, a cab assembly, a hydraulic drive assembly, a fuel tank, a hydraulic oil tank and a hydraulic control system. The front axle assembly and the rear axle assembly are connected in a hinged manner. The steering cylinder is arranged between the front axle assembly and the rear axle assembly and is used to control the relative movement of the front axle assembly and the rear axle assembly around the hinge point. The cab assembly and the front axle assembly are assembled into a whole. The hydraulic drive assembly includes an engine, a hydraulic pump and a hydraulic motor. The engine is connected to the hydraulic pump in a transmission manner. The hydraulic pump is connected to the hydraulic motor through a hydraulic control system. The hydraulic motor is connected to the front wheel and / or rear wheel transmission connection; a steering wheel is provided in the cab assembly, the steering column of the steering wheel is connected to the hydraulic steering gear, and the hydraulic steering gear is connected to the steering cylinder through a hydraulic circuit; the front and rear axles of the loader adopt an articulated steering design controlled by the steering cylinder, and the cab assembly and the front axle assembly are assembled into a whole, the cab can follow the front axle to rotate, the field of vision is better, and the operation is safer and more flexible; and the loader's walking and steering actions are fully hydraulically driven, which is convenient for the mechanical structure layout, and is conducive to ensuring the compactness of the loader's structure, and the hydraulic drive has stronger power, better reliability and flexibility, can achieve overload protection, and has a longer service life;

[0020] (2) The utility model is a fully hydraulically driven loader with a cab following the steering, wherein the front axle assembly and the rear axle assembly are rotatably connected via an articulated shaft, a steering swing arm is provided at a position of the rear axle assembly near the articulated shaft, one end of the steering cylinder is articulated to the front axle assembly, and the other end of the steering cylinder is articulated to the steering swing arm, the structure is simple and compact, the steering stability is good, the turning radius is small, and the movement is flexible and convenient;

[0021] (3) For the full-hydraulic drive loader with cab following steering of the present utility model, its fuel tank is located on one side of the cab assembly, and the hydraulic oil tank is located on the other side of the cab assembly. The structural layout is reasonable, facilitating fuel filling and maintenance;

[0022] (4) For the full-hydraulic drive loader with cab following steering of the present utility model, its fuel tank is located at the left rear side of the cab assembly, and there is a cab entrance at the front side of the fuel tank; the hydraulic oil tank is located on the right side of the cab assembly and serves as the right baffle of the cab; the fuel tank and the hydraulic oil tank both have structural functionality, further improving the structural compactness of the loader;

[0023] (5) For the full-hydraulic drive loader with cab following steering of the present utility model, it further includes a working device for hooking attachments. The working device is installed at the front part of the front axle assembly. The working device adopts a parallelogram link structure, which can ensure that the angle remains unchanged when the working device lifts the attachment, and the attachment remains relatively horizontal during the lifting process, improving the stability of the loader when working with different attachments. Description of the Drawings

[0024] Figure 1 is the left view of the full-hydraulic drive loader with cab following steering of the present utility model;

[0025] Figure 2 is the right view of the full-hydraulic drive loader with cab following steering of the present utility model;

[0026] Figure 3 is the front view of the full-hydraulic drive loader with cab following steering of the present utility model;

[0027] Figure 4 is the bottom structure schematic diagram of the full-hydraulic drive loader with cab following steering of the present utility model;

[0028] Figure 5 is the three-dimensional view of the full-hydraulic drive loader with cab following steering of the present utility model;

[0029] Figure 6 is the structure schematic diagram of the front axle assembly in the loader of the present utility model;

[0030] Figure 7 is the structure schematic diagram of the working device in the loader of the present utility model;

[0031] Figure 8 is the steering state schematic diagram of the full-hydraulic drive loader with cab following steering of the present utility model.

[0032] Explanation of the reference numerals in the schematic diagrams:

[0033] 1. Front axle assembly; 1-1, front wheel; 2, rear axle assembly; 2-1, rear wheel; 2-2, steering swing arm; 3, steering oil cylinder; 4, cab assembly; 4-1, steering wheel; 4-2, hydraulic steering gear; 5, hydraulic drive assembly; 6, fuel tank; 7, hydraulic oil tank; 8, hydraulic control system; 9, working device; 9-1, lifting oil cylinder; 9-2, lower lifting rod; 9-3, upper lifting rod; 9-4, mounting bracket; 9-5, attachment hitch plate; 9-6, angle adjustment oil cylinder; 10, covering parts; 11, hinge shaft. Detailed implementation manners

[0034] To further understand the content of the present utility model, the present utility model will be described in detail with reference to the accompanying drawings and embodiments.

[0035] [Embodiment]

[0036] Combined with Figures 1 to 5As shown in the figure, a full-hydraulic drive loader with cab follow-up steering according to this embodiment includes a front axle assembly 1, a rear axle assembly 2, a steering cylinder 3, and a cab assembly 4. The front axle assembly 1 has front wheels 1-1, and there are two front wheels 1-1. The rear axle assembly 2 has rear wheels 2-1, and there are also two rear wheels 2-1. The front axle assembly 1 and the rear axle assembly 2 are connected in a hinged form, that is, the front axle assembly 1 and the rear axle assembly 2 can rotate relative to each other. The steering cylinder 3 is arranged between the front axle assembly 1 and the rear axle assembly 2 and is used to control the relative movement of the front axle assembly 1 and the rear axle assembly 2 around the hinge point. This full-hydraulic drive loader with cab follow-up steering further includes a hydraulic drive assembly 5, a fuel tank 6, a hydraulic oil tank 7, and a hydraulic control system 8. The cab assembly 4 and the front axle assembly 1 are assembled into an integral body. Specifically, bolts can be used to connect the cab assembly 4 and the front axle assembly 1. The hydraulic drive assembly 5 is installed on the front axle assembly 1 and is located below the rear side of the cab assembly 4 and is used to drive the loader to travel. The fuel tank 6, the hydraulic oil tank 7, and the hydraulic control system 8 are respectively integrated on the front axle assembly 1. Among them, the hydraulic drive assembly 5 includes an engine, a hydraulic pump, and a hydraulic motor. The fuel tank 6 provides fuel for the engine. The engine is drivingly connected to the hydraulic pump and is used to drive the hydraulic pump to work, extracting hydraulic oil from the hydraulic oil tank 7 as the hydraulic power source for the entire hydraulic system. The hydraulic pump is connected to the hydraulic motor through the hydraulic control system 8. The hydraulic motor is drivingly connected to the front wheels 1-1 and / or the rear wheels 2-1. By controlling the hydraulic motor through the hydraulic control system 8 to drive the corresponding wheels to rotate, the loader is driven to travel. The loader can adopt a two-wheel drive or four-wheel drive structure. In the case of two-wheel drive, a hydraulic motor can be installed on two front wheels 1-1 or two rear wheels 2-1. In the case of four-wheel drive, hydraulic motors are installed on both two front wheels 1-1 and two rear wheels 2-1. A steering wheel 4-1 is provided in the cab assembly 4. The steering column of the steering wheel 4-1 is connected to a hydraulic steering gear 4-2. The hydraulic steering gear 4-2 is connected to the steering cylinder 3 through a hydraulic circuit. By using the hydraulic steering gear 4-2, the steering angle of the steering wheel 4-1 is proportional to the oil intake of the steering cylinder 3, so that the loader can be stably controlled to steer. For the loader of this embodiment, its front and rear axles adopt an articulated steering design controlled by a steering cylinder, and the cab assembly and the front axle assembly are assembled into an integral body. The cab can follow the hinge rotation of the front axle, providing a better view and safer and more flexible operation. Moreover, the actions such as the travel and steering of the loader adopt full-hydraulic drive, which is convenient for the layout of the mechanical structure, helps to ensure the structural compactness of the loader, and has stronger hydraulic drive power, better reliability and flexibility, can achieve overload protection, and has a longer service life.

[0037] Refer to Figure 4As shown in the figure, in this embodiment, the front axle assembly 1 and the rear axle assembly 2 are rotatably connected by a hinge shaft 11. A steering swing arm 2-2 is provided at a position of the rear axle assembly 2 close to the hinge shaft 11. One end of the steering oil cylinder 3 is hinged to the front axle assembly 1, and the other end of the steering oil cylinder 3 is hinged to the steering swing arm 2-2. By controlling the telescopic movement of the steering oil cylinder 3, the relative rotation of the front axle assembly 1 and the rear axle assembly 2 can be driven, thereby realizing the overall steering of the front axle. The structure is simple and compact, the steering stability is good, the turning radius is small, and the movement is flexible and convenient. As Figure 6 shown, a seat is integrated at the rear part of the front axle assembly 1, and a space for installing the hydraulic drive assembly 5 is left under the seat, ensuring the overall compactness of the loader. Figure 8 Figure shows the steering state of the loader. When the steering wheel 4-1 is rotated, the spool in the hydraulic steering gear 4-2 is driven to rotate, thereby changing the oil inflow and outflow in the steering oil cylinder 3. By using the telescopic

[0038] As Figure 1 、 Figure 2 and Figure 5 shown, in this embodiment, the fuel tank 6 is located on one side of the cab assembly 4, and the hydraulic oil tank 7 is located on the other side of the cab assembly 4. The structural layout is reasonable, facilitating fuel filling and maintenance. Specifically, the fuel tank 6 is located at the left rear side of the cab assembly 4, and a cab entrance and exit is left at the front side of the fuel tank 6, facilitating the driver to enter and exit. The hydraulic oil tank 7 is located on the right side of the cab assembly 4 and serves as the right side baffle of the cab. The fuel tank 6 and the hydraulic oil tank 7 both have structural functionality, further improving the structural compactness of the loader. In addition, a cover 10 is also provided on the front axle assembly 1 to ensure the cleanliness and beauty of the loader, and the cover 10 also plays a role in protecting the internal components. Of course, if necessary, a cover 10 can also be provided at the corresponding position of the rear axle assembly 2.

[0039] As Figure 5 and Figure 7As shown in the figure, the full-hydraulic drive loader with cab following steering in this embodiment further includes a working device 9 for attaching implements. The working device 9 is installed at the front of the front axle assembly 1. The above-mentioned implements include but are not limited to bucket types, mowing types, snow removal types, road sweeping types, etc., and different tasks can be completed by cooperating with different implements. Specifically, the working device 9 includes a lifting cylinder 9-1, a lower lifting rod 9-2, an upper lifting rod 9-3, a mounting bracket 9-4, an implement attachment plate 9-5, and an angle adjustment cylinder 9-6. One end of the lower lifting rod 9-2 is hinged to the front axle assembly 1 at hinge point A, and the other end is hinged to the mounting bracket 9-4 at hinge point B. One end of the upper lifting rod 9-3 is hinged to the front axle assembly 1 at hinge point D, and the other end is hinged to the mounting bracket 9-4 at hinge point C. The hinge points A, B, C, and D form a parallelogram structure. One end of the lifting cylinder 9-1 is hinged to the front axle assembly 1, and the other end is hinged to the lower lifting rod 9-2 or the upper lifting rod 9-3. The telescopic movement of the lifting cylinder 9-1 can drive the mounting bracket 9-4 to move parallel; the implement attachment plate 9-5 is rotatably installed at the front end of the mounting bracket 9-4. One end of the angle adjustment cylinder 9-6 is hinged to the mounting bracket 9-4, and the other end is hinged to the implement attachment plate 9-5. The telescopic movement of the angle adjustment cylinder 9-6 can drive the implement attachment plate 9-5 to change the angle. The above-mentioned working device 9 adopts a parallelogram link structure, which can ensure that the angle remains unchanged when the working device 9 lifts the implement, and always keeps the implement relatively horizontal during the lifting process, improving the stability of the loader when working with different implements. The above-mentioned lifting cylinder 9-1 and angle adjustment cylinder 9-6 are both controlled by the hydraulic control system 8, and the relevant control levers can be integrated in the cab.

[0040] The above-mentioned hydraulic control system 8 is composed of hydraulic components such as control valve groups and pipelines. The specific principle of the hydraulic system can be designed and assembled according to existing hydraulic technologies, and the specific structural principle of the hydraulic control system 8 will not be elaborated here. As for the throttle control system, brake control system, lighting system, etc. of the loader, they are similar to those of existing hydraulic engineering vehicles and will not be described in detail here.

[0041] A full-hydraulic drive loader with cab following steering of the present utility model adopts an articulated steering design controlled by steering cylinders for the front and rear axles, and assembles the cab assembly and the front axle assembly into an integral unit. The cab can follow the front axle to articulate and rotate, providing a better view and more safe and flexible operation; moreover, the walking and steering actions of the loader adopt full-hydraulic drive, which is convenient for the layout of the mechanical structure, helps to ensure the compactness of the loader's structure, and has stronger hydraulic drive power, better reliability and flexibility, can achieve overload protection, and has a longer service life.

[0042] The above has schematically described the present utility model and its implementation manners. This description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the present utility model. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.

Claims

1. A fully hydraulically driven loader with a cab following steering, comprising a front axle assembly (1), a rear axle assembly (2), a steering cylinder (3) and a cab assembly (4), wherein the front axle assembly (1) has a front wheel (1-1), the rear axle assembly (2) has a rear wheel (2-1), the front axle assembly (1) and the rear axle assembly (2) are connected in an articulated manner, the steering cylinder (3) is arranged between the front axle assembly (1) and the rear axle assembly (2) and is used to control the relative movement of the front axle assembly (1) and the rear axle assembly (2) around a hinge point, and is characterized in that: The invention also comprises a hydraulic drive assembly (5), a fuel tank (6), a hydraulic oil tank (7) and a hydraulic control system (8). The cab assembly (4) and the front axle assembly (1) are assembled into an integral body. The hydraulic drive assembly (5) is mounted on the front axle assembly (1) and is located at the rear side and below the cab assembly (4). The fuel tank (6), the hydraulic oil tank (7) and the hydraulic control system (8) are respectively integrated on the front axle assembly (1). The hydraulic drive assembly (5) comprises an engine, a hydraulic pump and a hydraulic motor. The engine is connected to the hydraulic pump by transmission. The hydraulic pump is connected to the hydraulic motor through the hydraulic control system (8). The hydraulic motor is connected to the front wheel (1-1) and / or the rear wheel (2-1) by transmission. The cab assembly (4) is provided with a steering wheel (4-1). The steering column of the steering wheel (4-1) is connected to the hydraulic steering gear (4-2). The hydraulic steering gear (4-2) is connected to the steering cylinder (3) through a hydraulic circuit.

2. The fully hydraulically driven loader with cab following steering according to claim 1, characterized in that: The front axle assembly (1) and the rear axle assembly (2) are rotatably connected via an articulated shaft (11); a steering swing arm (2-2) is provided on the rear axle assembly (2) near the articulated shaft (11); one end of the steering cylinder (3) is articulated to the front axle assembly (1); and the other end of the steering cylinder (3) is articulated to the steering swing arm (2-2).

3. The fully hydraulically driven loader with cab following steering according to claim 1, characterized in that: The fuel tank (6) is located on one side of the cab assembly (4), and the hydraulic oil tank (7) is located on the other side of the cab assembly (4).

4. The fully hydraulically driven loader with cab following steering according to claim 3, characterized in that: The fuel tank (6) is located at the left rear side of the cab assembly (4), and a cab entrance and exit is reserved at the front side of the fuel tank (6).

5. The fully hydraulically driven loader with cab following steering according to claim 4, characterized in that: The hydraulic oil tank (7) is located on the right side of the cab assembly (4) and serves as a right side baffle of the cab.

6. The fully hydraulically driven loader with cab following steering according to any one of claims 1 to 5, characterized in that: It also includes a working device (9) for hooking accessories, and the working device (9) is installed at the front part of the front axle assembly (1).

7. The fully hydraulically driven loader with cab following steering according to claim 6, characterized in that: The working device (9) comprises a lifting cylinder (9-1), a lower lifting rod (9-2), an upper lifting rod (9-3), a mounting frame (9-4), an attachment mounting plate (9-5) and an angle adjustment cylinder (9-6); one end of the lower lifting rod (9-2) is hinged to the front axle assembly (1) at a hinge point A, and the other end is hinged to the mounting frame (9-4) at a hinge point B; one end of the upper lifting rod (9-3) is hinged to the front axle assembly (1) at a hinge point D, and the other end is hinged to the mounting frame (9-4) at a hinge point C. On the mounting frame (9-4), hinge point A, hinge point B, hinge point C and hinge point D form a parallelogram structure; one end of the lifting cylinder (9-1) is hinged to the front axle assembly (1), and the other end is hinged to the lower lifting rod (9-2) or the upper lifting rod (9-3); the accessory mounting plate (9-5) is rotatably mounted on the front end of the mounting frame (9-4); one end of the angle adjustment cylinder (9-6) is hinged to the mounting frame (9-4), and the other end is hinged to the accessory mounting plate (9-5).

8. The fully hydraulically driven loader with cab following steering according to claim 6, characterized in that: The front axle assembly (1) is also provided with a covering component (10).

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