Shovel frame lifting hydraulic structure of ice surface snow removal land leveler and land leveler

Abstract

The invention belongs to the technical field of snow removing equipment, and particularly relates to a shovel frame lifting hydraulic structure of an ice surface snow removing land leveler and the land leveler. The shovel frame lifting hydraulic structure comprises an oil tank, a hydraulic pump, an overflow valve, an electromagnetic reversing valve and a hydraulic rod, and the oil tank, the hydraulic pump, the overflow valve, the electromagnetic reversing valve and the hydraulic rod are communicated through an oil pipe I; the oil tank is connected with an electromagnetic control valve through two second oil pipes, one of the second oil pipes is communicated with the hydraulic pump through the electromagnetic control valve, and before the hydraulic system is started, warm hydraulic oil is used for continuous circulation, so that the temperature of equipment and pipelines is slowly increased; therefore, when the hydraulic system is started, the equipment is in a warm state, the situation that the equipment cannot be started due to low temperature is avoided, the condition that the equipment is started frequently for several times to increase the oil temperature to reduce the start-stop frequency is avoided, the loss of the whole equipment is further reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of snow-clearing equipment, and in particular relates to a shovel frame lifting hydraulic structure of an ice surface snow-clearing grader and the grader. Background Art

[0002] A motor grader is a device that uses a scraper to level the ground and a shovel to push the snow in front. The scraper is installed between the front and rear axles of the machine and can be raised and lowered, tilted, rotated and extended. The shovel is located at the front of the vehicle. In winter, when the temperature is low, a layer of ice will form on the road surface to form an ice surface. A large amount of snow will accumulate on the ice layer, forming a road obstacle. In order to ease traffic pressure, a motor grader will be used to clear the snow on the ice surface and clear it to both sides of the road. The shovel uses a set of hydraulic lifting mechanisms to achieve lifting, tilting, rotation and extension.

[0003] When traveling to a long distance, we will first drive the equipment to the destination, and then start the equipment to start operation. Due to the low temperature in winter, the temperature of the equipment, including the oil temperature, is very low when starting the equipment, which will increase its viscosity and friction, thereby affecting the service life of the equipment. Therefore, we will start the equipment several times before operation to ensure that the oil temperature is suitable for the operation. This not only wastes a lot of time, but also invisibly increases the number of starts, shortening the life of the power unit. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a shovel frame lifting hydraulic structure of an ice surface snow removal grader and a grader.

[0005] The present invention provides a hydraulic structure for lifting a shovel frame of an ice snow removal grader, comprising an oil tank, a hydraulic pump, a relief valve, an electromagnetic reversing valve and a hydraulic rod, wherein the oil tank, the hydraulic pump, the relief valve, the electromagnetic reversing valve and the hydraulic rod are connected through an oil pipe 1, and the oil tank is connected to an electromagnetic control valve through two oil pipes 2, wherein one of the oil pipes 2 is connected to the hydraulic pump through an electromagnetic control valve;

[0006] The other oil pipe 2 is connected to a one-way valve through an electromagnetic control valve, and the one end of the one-way valve away from the electromagnetic control valve is connected to a preheating pipe, and the one end of the preheating pipe away from the one-way valve is connected to the hydraulic pump and the oil pipe 1 between the electromagnetic reversing valve through the engine housing, and the oil outlet port of the preheating pipe, the oil pipe 1 between the hydraulic pump and the electromagnetic reversing valve, and the oil pipe 1 between the hydraulic pump and the overflow valve are connected to each other in pairs;

[0007] A motor is installed on the outer wall of the oil tank, a reciprocating screw is installed on the output end of the motor, a guide plate capable of reciprocating movement is installed on the reciprocating screw, a linear limiter is arranged between the guide plate and the oil tank, a bellows with an opening downward is installed on the bottom side wall of the oil tank, the bellows is connected with the preheating pipe through the second oil pipe and the electromagnetic control valve, a plurality of flow holes are opened on the upper end of the bellows, and the upper end of the bellows is detachably connected to the bottom side wall of the guide plate;

[0008] The hydraulic rod includes a lifting rod housing and a piston. A straight spring is installed on the inner side wall of the upper end of the lifting rod housing, and the straight spring is against a side wall of the piston. A hole is also opened on the side wall of the lifting rod housing, and a deformation plate is installed on the hole. A control ring is installed on the outer side wall of the lifting rod housing, and a threaded pin is threadedly connected to the control ring. The bottom end of the threaded pin and the hole are on the same longitudinal axis.

[0009] Preferably, the lifting hydraulic structure is provided with three hydraulic oil circuit paths, respectively including:

[0010] First, the oil tank, hydraulic pump, electromagnetic reversing valve, hydraulic rod, electromagnetic reversing valve, oil tank are included in sequence;

[0011] The second one is oil tank, hydraulic pump, overflow valve and oil tank in sequence;

[0012] Third, in order, there are the fuel tank, the solenoid control valve, the engine housing, the solenoid reversing valve, the hydraulic rod, the solenoid reversing valve, and the fuel tank.

[0013] Preferably, the middle section of the preheating tube is wound around the side wall of the engine casing in a ring shape.

[0014] Preferably, the material of the deformable plate is at least one of rubber, plastic and polyimide.

[0015] Preferably, a top ball is fixedly connected to the bottom end of the threaded pin.

[0016] Preferably, a second magnet is installed on the inner side wall of the upper end of the bellows, and a first magnet is installed on the bottom side wall of the guide plate, and the first magnet and the second magnet attract each other due to opposite polarities.

[0017] Preferably, the linear limiter comprises a concave pin threadedly connected to one side of the guide plate and a limit rod fixedly connected to the bottom side wall of the oil tank, and the limit rod passes through the concave pin and is slidably connected up and down.

[0018] Preferably, the preheating tube wound on the side wall of the engine casing comprises an oil inlet port and an oil outlet port, and the positions of the oil inlet port and the oil outlet port are at the highest point relative to the preheating tube of the wound portion.

[0019] Preferably, the motor grader comprises a motor grader frame, and the shovel frame lifting hydraulic structure is installed on the motor grader frame.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Before starting the hydraulic system, use warm hydraulic oil to circulate continuously to slowly increase the temperature of the equipment and pipelines. In this way, the equipment is in a warm state when the hydraulic system is started, and there will be no situation where the equipment cannot be started due to low temperature. There is no need to start the system several times frequently to increase the oil temperature, so as to reduce the start-stop frequency, further reduce the loss of the entire equipment, and extend its service life.

[0022] 2. Use the heat generated by the engine for preheating. All actuators are basic components with high cost performance. At the same time, in terms of preheating time, as long as the destination is far away, it can be carried out during the process of the grader driving to the destination, reducing the time cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of a shovel frame lifting hydraulic structure of an ice surface snow removal grader and the grader proposed by the present invention;

[0024] Figure 2 A schematic diagram of a shovel frame lifting hydraulic structure of an ice surface snow removal grader and a top view of the grader proposed by the present invention;

[0025] Figure 3 It is a schematic front view of the partial internal structure of the fuel tank;

[0026] Figure 4 It is a bottom view schematic diagram of the internal partial structure of the fuel tank;

[0027] Figure 5 It is a schematic diagram of the partial structure of the cross-section of the bellows;

[0028] Figure 6 It is a schematic diagram of the local structure of the control loop;

[0029] Figure 7 It is a schematic diagram of a partial cross-sectional structure of a lifting rod housing;

[0030] Figure 8 It is a partial cross-sectional structural schematic diagram of a hydraulic lifting rod;

[0031] Fig. 9 Schematic diagram of hydraulic system circuit.

[0032] In the figure: 1 a grader frame, 2 an electromagnetic control valve, 3 a one-way valve, 4 an oil tank, 5 a preheating pipe, 6 an overflow valve, 7 a control ring, 8 a hydraulic rod, 81 a lifting rod housing, 9 a motor, 10 a hydraulic pump, 11 an electromagnetic reversing valve, 12 a limit rod, 13 a guide plate, 14 a flow hole, 15 a bellows, 16 a reciprocating screw, 17 a first magnet, 18 a second magnet, 19 a top ball, 20 a threaded pin, 21 a deformation plate, 22 a piston, and 23 a straight spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Embodiment 1

[0035] Reference Figure 1-Figure 9 A shovel frame lifting hydraulic structure of an ice snow removal grader includes an oil tank 4, a hydraulic pump 10, a relief valve 6, an electromagnetic reversing valve 11 and a hydraulic rod 8. The oil tank 4, the hydraulic pump 10, the relief valve 6, the electromagnetic reversing valve 11 and the hydraulic rod 8 are connected through an oil pipe 1. The shovel frame is installed at the lower end of the hydraulic rod 8. The above-mentioned equipment and the connection relationship between them belong to the prior art and are the basic part of the hydraulic lifting system. Its working principle will not be described in detail. The oil tank 4 is connected to the electromagnetic control valve 2 through two oil pipes 2, and one of the oil pipes 2 is connected to the hydraulic pump 10 through the electromagnetic control valve 2.

[0036] Another oil pipe 2 is connected to a one-way valve 3 through an electromagnetic control valve 2. One end of the one-way valve 3 facing away from the electromagnetic control valve 2 is connected to a preheating pipe 5. One end of the preheating pipe 5 facing away from the one-way valve 3 is connected to an oil pipe 1 between the hydraulic pump 10 and the electromagnetic reversing valve 11 through the engine casing. The middle section of the preheating pipe 5 is annularly wound on the side wall of the engine casing. The engine is the power unit of the grader. The annular winding can increase the heating area of ​​the preheating pipe 5 and shorten the heating time of the hydraulic oil in the preheating pipe 5. The oil outlet port of the preheating pipe 5, the oil pipe 1 between the hydraulic pump 10 and the electromagnetic reversing valve 11, and the oil pipe 1 between the hydraulic pump 10 and the overflow valve 6 are interconnected in pairs, and there is an intersection between the three.

[0037] A motor 9 is installed on the outer wall of the oil tank 4, and a reciprocating screw 16 is installed on the output end of the motor 9. A guide plate 13 that can reciprocate is installed on the reciprocating screw 16. A linear limiter is arranged between the guide plate 13 and the oil tank 4. The linear limiter includes a concave pin threadedly connected to one side of the guide plate 13 and a limit rod 12 fixedly connected to the bottom side wall of the oil tank 4. The limit rod 12 penetrates the concave pin and is slidably connected up and down. The limit rod 12 can limit the rotation of the guide plate 13 so that it maintains stable up and down reciprocating movement. A bellows 15 with an opening downward is installed on the bottom side wall of the oil tank 4. The bellows 15 passes through the oil pipe 2 and the electromagnetic control valve 2 is connected to the preheating tube 5, a plurality of flow holes 14 are provided at the upper end of the bellows 15, the upper end of the bellows 15 is detachably connected to the bottom side wall of the guide plate 13, a second magnet 18 is installed on the inner side wall of the upper end of the bellows 15, and a first magnet 17 is installed on the bottom side wall of the guide plate 13. The first magnet 17 and the second magnet 18 are attracted to each other by opposite charges. When installing, the second magnet 18 is brought close to the first magnet 17 so that they can be adsorbed to each other. When disassembling, the second magnet 18 can be removed from the first magnet 17. By utilizing mutual adsorption, the bellows 15 can follow the up and down movement of the guide plate 13 to complete compression and extension.

[0038] The hydraulic rod 8 includes a lifting rod housing 81 and a piston 22. A straight spring 23 is installed on the inner side wall of the upper end of the lifting rod housing 81, and the straight spring 23 is against a side wall of the piston 22. A hole is also opened on the side wall of the lifting rod housing 81, and a deformation plate 21 is installed on the hole. The material of the deformation plate 21 is at least one of rubber, plastic, and polyimide. These materials have good resilience and deformation ability. A control ring 7 is installed on the outer side wall of the lifting rod housing 81. A threaded pin 20 is threadedly connected to the control ring 7. The bottom end of the threaded pin 20 and the hole are on the same longitudinal axis. A top ball 19 is fixedly connected to the bottom end of the threaded pin 20. The spherical top ball 19 has a small contact area when contacting the deformation plate 21, and it is easier to squeeze the deformation plate 21 to deform.

[0039] The invention discloses an ice snow removal grader with a shovel frame lifting hydraulic structure. The grader comprises a grader frame 1, and the shovel frame lifting hydraulic structure is installed on the grader frame 1.

[0040] When working normally, the hydraulic oil circuit path is the oil tank 4, the hydraulic pump 10, the electromagnetic reversing valve 11, the hydraulic rod 8, the electromagnetic reversing valve 11, and the oil tank 4, thereby realizing the lifting and lowering of the hydraulic rod 8.

[0041] When the internal pressure of the hydraulic system is too high, part of the hydraulic oil circuit path is the oil tank 4, the hydraulic pump 10, the overflow valve 6, and the oil tank 4.

[0042] Before the hydraulic rod 8 starts working, the hydraulic oil circuit path is the oil tank 4, the electromagnetic control valve 2, the engine housing, the electromagnetic reversing valve 11, the hydraulic rod 8, the electromagnetic reversing valve 11, and the oil tank 4.

[0043] Before the hydraulic rod 8 is put into operation, the hydraulic oil circuit path is specifically introduced. Before arriving at the construction site, the grader will travel a distance normally. Before driving, the threaded pin 20 is rotated so that the top ball 19 will not squeeze the deformation plate 21. In this process, the engine generates a large amount of heat because of the work it does to provide driving force for the wheels, thereby increasing the temperature around the engine casing. The preheating pipe 5 wrapped around the engine casing is heated through heat transfer, so that the internal hydraulic oil is also heated. When the hydraulic oil temperature is heated to a suitable range, the solenoid control valve 2 is adjusted to connect the path of the oil pipe 2 and the preheating pipe 5, and close the path of the oil pipe 2 and the oil pipe 1. At the same time, the motor 9 is controlled to start.

[0044] Among them, starting the motor 9 will cause the reciprocating screw 16 to rotate, and under the action of the linear limit member, the guide plate 13 performs reciprocating motion on the reciprocating screw 16. The highest height of the guide plate 13 is lower than the oil level of the hydraulic oil in the oil tank 4. When moving downward, the bellows 15 will be compressed, and a small amount of hydraulic oil will flow out from the circulation hole 14, and most of the hydraulic oil will flow from the oil pipe 2 through the one-way valve 3 into the preheating pipe 5. As the amount of oil inside the oil tank 4 decreases, the space increases, and the pressure decreases, a negative pressure will be formed inside the pipeline, thereby sending some of the residual hydraulic oil in the oil pipe 1 into the oil tank 4 and merging with it. When the bellows 15 moves upward with the guide plate 13, the hydraulic oil in the oil tank 4 will refill the bellows 15 through the circulation hole 14, thereby forming a circulating oil pressure process.

[0045] During the above process, the hydraulic pump 10 and the electromagnetic reversing valve 11 are in an unstarted state. During the compression of the bellows 15, the hydraulic oil is continuously fed into the preheating tube 5, which will cause the hydraulic oil wrapped around the preheating tube 5 to flow out of the preheating tube 5 and enter the oil pipe 1 between the hydraulic pump 10 and the electromagnetic reversing valve 11, and the oil pipe 1 between the hydraulic pump 10 and the overflow valve 6. The oil pressure is not enough to push open the valve core in the overflow valve 6.

[0046] The hydraulic oil enters the hydraulic rod 8 through the electromagnetic reversing valve 11, squeezing the piston 22 in the hydraulic rod 8 to move, so that it slowly moves to the upper end of the lifting rod housing 81. The lifting rod housing 81 is provided with an upper oil port and a lower oil port for the hydraulic oil to enter and exit. An accommodating space is reserved inside the upper end of the lifting rod housing 81. When the piston 22 is squeezed to the limit position under the oil pressure, the position of the piston 22 is at the position of the upper oil port of the lifting rod housing 81, and part of the upper oil port will leak out, so that the two oil ports and the space inside the lifting rod housing 81 are connected to each other, and there is no longer any obstruction from the piston 22. When the oil pressure is insufficient, the piston 22 will move back, so that the two oil ports cannot be connected again. When connected, the straight spring 23 and the piston 22 are located in the accommodating space, and the hydraulic oil enters from the lower oil port and exits from the upstream port. At this time, the hydraulic rod 8 is in an unextended state, and the hydraulic oil flows back to the oil tank 4 to complete a circle of circulation.

[0047] In this process, the flowing hydraulic oil is the hydraulic oil heated by the engine casing. When the motor 9 is started for the first time, the grader has been running for a while, and the oil temperature in the preheating pipe 5 is in a warm state, so it circulates. During the circulation process, the oil temperature rises slowly, so the temperature of each device also rises slowly, and there will be no large temperature difference between the oil temperature and the device. Because it is winter and the outside weather is cold, if the oil temperature is very high and the device temperature is low, this temperature difference will cause damage to the equipment and reduce its service life.

[0048] Before the hydraulic system is started, in the process of reaching the destination, warm hydraulic oil is continuously circulated to slowly raise the temperature of the equipment and pipelines. In this way, the equipment is in a warm state when the hydraulic system is started, and there will be no situation where the equipment cannot be started due to low temperature. There is no need to start the equipment several times frequently to increase the oil temperature, so as to reduce the start-stop frequency, further reduce the loss of the entire equipment, and extend the service life.

[0049] When the hydraulic oil returns to the oil tank 4 after a circle, the temperature of the mixed hydraulic oil decreases. Since the hydraulic oil is constantly flowing, it can absorb the heat of the engine casing. This cycle can effectively help cool the engine and increase the service life of the engine.

[0050] When the destination is reached, the motor 9 is stopped and the electromagnetic control valve 2 is adjusted to connect the oil pipe 2 with the oil pipe 1. Since the oil supply is no longer in progress, the piston 22 is reset under the action of the straight spring 23, so that the piston 22 is located between the upper oil port and the downstream port. Figure 8At the same time, the threaded pin 20 is manually rotated to move the threaded pin 20 inward, thereby squeezing the deformation plate 21, causing the deformation plate 21 to bulge slightly, limiting the position of the piston 22 so that it will not move to a position that connects the oil supply port and the downstream port, and then turning on the hydraulic pump 10 to perform the normal lifting function of the hydraulic rod 8.

[0051] Embodiment 2

[0052] The difference from the first embodiment is that:

[0053] The preheating tube 5 wound around the side wall of the engine casing includes an oil inlet port and an oil outlet port, and the positions of the oil inlet port and the oil outlet port are at the highest position relative to the preheating tube 5 of the wound portion.

[0054] And there is a height difference between the part of the preheating pipe 5 connected to the oil pipe 1 and the engine. When the preheating stage is over and normal operation is in progress, since the oil pipe 1 and the preheating pipe 5 are connected, most of the hydraulic oil in the preheating pipe 5 of the winding part will enter the oil pipe 1 to participate in the work. Since the position of the oil inlet port and the position of the oil outlet port are at the highest point relative to the preheating pipe 5 of the winding part, the process of the hydraulic oil entering the oil outlet port from the oil inlet port is to move to the bottom first and then move to the top oil outlet port to go out. Therefore, when the preheating stage is over, the hydraulic oil in the preheating pipe 5 of the winding part will offset the negative pressure under the action of gravity, so that some hydraulic oil will remain in the preheating pipe 5 of the winding part. When the engine generates heat, this part of the hydraulic oil can be directly heated. When the motor 9 is started, this part of the hydraulic oil can be directly used and circulated.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A shovel frame lifting hydraulic structure of an ice snow removal grader, comprising an oil tank (4), a hydraulic pump (10), a relief valve (6), an electromagnetic reversing valve (11) and a hydraulic rod (8), wherein the oil tank (4), the hydraulic pump (10), the relief valve (6), the electromagnetic reversing valve (11) and the hydraulic rod (8) are connected through an oil pipe, and is characterized in that: The oil tank (4) is connected to the electromagnetic control valve (2) via two oil pipes 2, wherein one of the oil pipes 2 is connected to the hydraulic pump (10) via the electromagnetic control valve (2); The other oil pipe 2 is connected to a one-way valve (3) through an electromagnetic control valve (2); the one end of the one-way valve (3) away from the electromagnetic control valve (2) is connected to a preheating pipe (5); the one end of the preheating pipe (5) away from the one-way valve (3) is connected to an oil pipe 1 between the hydraulic pump (10) and the electromagnetic reversing valve (11) through the engine housing; the oil outlet port of the preheating pipe (5), the oil pipe 1 between the hydraulic pump (10) and the electromagnetic reversing valve (11), and the oil pipe 1 between the hydraulic pump (10) and the overflow valve (6) are connected to each other in pairs; A motor (9) is mounted on the outer wall of the oil tank (4), a reciprocating screw (16) is mounted on the output end of the motor (9), a guide plate (13) capable of reciprocating movement is mounted on the reciprocating screw (16), a linear limiter is arranged between the guide plate (13) and the oil tank (4), a bellows (15) with an opening facing downward is mounted on the bottom wall of the oil tank (4), the bellows (15) is connected to the preheating pipe (5) through oil pipe 2 and the electromagnetic control valve (2), a plurality of flow holes (14) are arranged at the upper end of the bellows (15), and the upper end of the bellows (15) is detachably connected to the bottom wall of the guide plate (13); The hydraulic rod (8) comprises a lifting rod housing (81) and a piston (22); a straight spring (23) is installed on the inner side wall of the upper end of the lifting rod housing (81); the straight spring (23) abuts against a side wall of the piston (22); a hole is also provided on the side wall of the lifting rod housing (81); a deformation plate (21) is installed on the hole; a control ring (7) is installed on the outer side wall of the lifting rod housing (81); a threaded pin (20) is threadedly connected to the control ring (7); and the bottom end of the threaded pin (20) and the hole are on the same longitudinal axis.

2. The hydraulic structure for lifting the shovel frame of an ice snow removal grader according to claim 1 is characterized in that: The lifting hydraulic structure is provided with three hydraulic oil circuit paths, respectively including: First, the oil tank (4), the hydraulic pump (10), the electromagnetic reversing valve (11), the hydraulic rod (8), the electromagnetic reversing valve (11), and the oil tank (4); Second, the oil tank (4), the hydraulic pump (10), the overflow valve (6), and the oil tank (4) in sequence; Third, the oil tank (4), the electromagnetic control valve (2), the engine housing, the electromagnetic reversing valve (11), the hydraulic rod (8), the electromagnetic reversing valve (11), and the oil tank (4) are arranged in sequence.

3. The hydraulic structure for lifting the shovel frame of an ice snow removal grader according to claim 2 is characterized in that: The middle section of the preheating tube (5) is wound around the side wall of the engine casing in an annular shape.

4. The hydraulic structure for lifting the shovel frame of an ice snow removal grader according to claim 3 is characterized in that: The material of the deformable plate (21) is at least one of rubber, plastic and polyimide.

5. The hydraulic structure for lifting the shovel frame of an ice snow removal grader according to claim 4, characterized in that: The bottom end of the threaded pin (20) is fixedly connected with a top ball (19).

6. The hydraulic structure for lifting the shovel frame of an ice snow removal grader according to claim 5, characterized in that: A second magnet (18) is mounted on the inner side wall of the upper end of the bellows (15), and a first magnet (17) is mounted on the bottom side wall of the guide plate (13), and the first magnet (17) and the second magnet (18) attract each other due to opposite polarities.

7. The hydraulic structure for lifting the shovel frame of an ice snow removal grader according to claim 6, characterized in that: The linear limiter comprises a concave pin threadedly connected to one side of the guide plate (13) and a limiter rod (12) fixedly connected to the bottom side wall of the oil tank (4); the limiter rod (12) passes through the concave pin and is slidably connected up and down.

8. The hydraulic structure for lifting the shovel frame of an ice snow removal grader according to claim 7, characterized in that: The preheating pipe (5) wound on the side wall of the engine casing comprises an oil inlet port and an oil outlet port, and the positions of the oil inlet port and the oil outlet port are at the highest point relative to the preheating pipe (5) of the wound portion.

9. An ice snow removal grader having a shovel frame lifting hydraulic structure according to claim 8, characterized in that: The grader comprises a grader frame (1), and the shovel frame lifting hydraulic structure is installed on the grader frame (1).

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