CN104541635A - Balancing chassis structure of high-ground-clearance plant protection machine - Google Patents

Abstract

The invention discloses a balanced chassis structure of a plant protection machine with a high ground clearance, which includes a vehicle frame and wheels, two left and right ground profiling cradles longitudinally connecting the front and rear wheels, and a transverse cradle passes between the two ground profiling cradles. The central axis is connected, and the ground profiling cradle can rotate around the central axis. The end of the central axis protruding out of the two ground profiling cradles is provided with a rocker arm, and the legs under the frame are connected to the movable end of the rocker arm through a rotating pair. , The front and rear ends of the ground profiling cradle are provided with shock absorbers supporting the connected frame. The invention combines the wheels on both sides longitudinally through the ground profiling cradle, and forms a variable flexible frame through the central axis to ensure that all the wheels are always in contact with the ground, and the centers of the four wheels will not be fixed on the same plane, so that each wheel can It can freely go up and down with the ups and downs of the road surface. When the plant protection machine is turning or driving on uneven roads, the chassis profiling cradle can swing freely to maintain the stability of the car body and the balance of vehicle components such as spray booms and suspensions.

Description

A balanced chassis structure of a plant protection machine with high ground clearance

technical field

The invention belongs to the field of agricultural machinery, in particular to a balance chassis used on a self-propelled plant protection machine.

Background technique

At present, the domestic large-scale plant protection machinery is mainly large-scale wide boom sprayer (self-propelled, towed and suspended). When the large-load boom sprayer is working on uneven field ground, the fuselage will fluctuate with the ups and downs of the ground. On the one hand, the shaking of the fuselage will cause the boom hanging on the sprayer body to shake, and the shake of the boom will make the pesticide spray Unevenness will affect the quality of work, and the swing of the spray boom will cause damage to the spray boom and cause accidents; The box structure produces cyclical impact loads, causing fatigue damage to the structure.

Contents of the invention

The technical purpose of the present invention is to propose a novel balanced chassis structure of a plant protection machine with high ground clearance to improve the stability of the vehicle body during walking, aiming at the problems existing in the prior art.

The technical scheme disclosed in the present invention is:

A balanced chassis structure of a plant protection machine with high ground clearance, including a vehicle frame and wheels, characterized in that two sets of left and right ground profiling cradles are provided to connect the front and rear wheels longitudinally, and a transverse cradle is passed between the two ground profiling cradles. The central axis is connected, and the ground profiling cradle can rotate around the central axis. The central axis protrudes from the outer ends of the two ground profiling cradles and is provided with a rocker arm. The legs below the frame are hinged to the movable end of the rocker arm. The front and rear ends of the ground profiling cradle are provided with shock absorbers supporting and connecting the frame.

Further technical solutions include:

The bottom of the shock absorber is connected to a hinge support, and the hinge support is connected to the ground profiling cradle through a slewing bearing.

The central shaft is provided with an adjustable locking mechanism for positioning the position of the ground profiling cradle on the central shaft, so that the distance between the left and right wheels of the plant protection machine can be adjusted to adapt to the operation between ridges of different widths.

The adjustable locking mechanism of a ground profiling cradle includes several limit rings and a sliding sleeve. The ground profiling cradle is fixedly connected, a limit ring locks the other end of the sliding sleeve, and a limit ring locks the outer end of the ground profiling cradle. The setting of the sliding sleeve increases the contact area between the cradle and the central shaft, avoids excessive concentration of stress on the central shaft by the cradle, and improves the service life of the central shaft.

The rocker arm is preferably fixed on the central shaft by a spline connection structure.

Each wheel is respectively provided with a set of drive mechanism, and the drive mechanism includes a hydraulic motor with disc brakes and a travel reducer.

Preferably, the middle part of the ground profiling cradle is configured as a fish-belly beam structure to increase the structural strength, and the front and rear ends are arc-shaped turning toward the outside, so that the wheels can have a larger rotation angle.

The end of the ground profiling cradle is hinged on the kingpin shaft of the steering knuckle, and the ground profiling cradle is provided with a reversing oil cylinder on the inner surface close to the end, and the cylinder barrel of the reversing oil cylinder is connected to the ground through the hinge support. The profiling cradle is hinged, the extended end of the piston rod of the reversing cylinder is connected with one end of the steering knuckle through a rotating pair, and the other end of the steering knuckle is fixedly installed on the kingpin shaft, and the kingpin shaft is pushed by the drive of the reversing cylinder Drive the wheels to turn.

The end of the ground profiling cradle is provided with a truncated cone-shaped shaft cap, and the upper end of the kingpin shaft is installed and locked in the shaft cap.

The chassis structure of the present invention is also provided with a bucket-shaped wheel support frame to protect the peripheral side of the wheel drive motor, and the wheel support frame is fixedly connected to the bottom of the king pin shaft of the steering knuckle.

Beneficial effects of the present invention:

In the present invention, the wheels on both sides are longitudinally coupled through the ground profiling cradle, and a variable flexible frame is formed through the central axis to ensure that all the wheels are always in contact with the ground, and the centers of the four wheels will not be fixed on the same plane, so that each wheel It can freely go up and down with the ups and downs of the road surface. When the body of the boom sprayer turns or drives on uneven roads, the chassis profiling cradle can swing freely, which ensures the stability and comfort of the sprayer, and is more conducive to keeping the spray boom at the right position. The stability and balance in the vertical and horizontal directions can effectively improve the situation that the spray boom is prone to touch the ground when the vehicle body is shaking, so that the spray boom sprayer is suitable for field operations in various road conditions, and the chassis structure of the present invention is also suitable for other fields. Vehicles such as management operations or mountain off-road vehicles.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the side view structure schematic diagram of the present invention;

Fig. 3 is the top view structure schematic diagram of the present invention;

Fig. 4 is the bottom view structure schematic diagram of the present invention;

Fig. 5 is the front view structure schematic diagram of the present invention;

FIG. 6 is a structural schematic diagram of some components of the present invention;

Fig. 7 is a partial enlarged structural schematic diagram of Fig. 6;

Fig. 8 is a structural schematic diagram II of some components of the present invention;

Fig. 9 is a partial enlarged structural schematic diagram of Fig. 8;

Fig. 10 is a schematic cross-sectional structure diagram of the main shaft pin and the shaft cap.

Detailed ways

In order to further clarify the technical scheme and working principle of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 10, a balanced chassis structure of a plant protection machine with high ground clearance includes a frame 1, wheels 4, and two left and right ground profiling cradles 3 (equivalent to longitudinal beams) connecting the front and rear wheels.

The middle positions of the two ground profiling cradles 3 are connected by a transverse central axis 16 , and the ground profiling cradles 3 can rotate around the central axis 16 . The central shaft 16 is provided with an adjustable locking mechanism for positioning the lateral position of the ground profiling cradle 3 on the central shaft 16. As shown in FIG. On the inner side of the cradle 3, one end of the sliding sleeve 15 is fixedly connected with the ground profiling cradle 3, a limit ring 17 locks the other end of the sliding sleeve 15, and a limit ring 17 locks the ground profiling cradle 3 the outer end.

Described central axis 16 is positioned at the end of two ground profiling cradles 3 outer sides respectively to be provided with a rocking arm 6, and described rocking arm 6 one end adopts spline to be fixed on the central axis 16, and the support foot 1-1 below vehicle frame 1 and The free end of the rocking arm 6 is connected by a rotating pair, and the bottom surface of the supporting foot 1-1 is provided with a rubber pad to avoid rigid collision between the supporting foot and the bonding surface of the rocking arm 6 when driving on a bumpy road.

The front and rear ends of the ground profiling cradle 3 are provided with spring damping shock absorbers 12 supporting the vehicle frame 1, and the shock absorbers 12 do not exceed the position of the steering knuckle kingpin shaft 20 forward or backward. . The bottom of the shock absorber 12 is connected to a hinge support 13, and the hinge support 13 is connected to the ground profiling cradle 3 through the slewing support 6, and can rotate around the slewing support 6. The outer ring of the slewing support 6 is fixed on the ground profiling cradle 3 . The top end of the shock absorber 12 is connected to the vehicle frame 1 through a ball joint structure 11 or a rubber bushing, preferably using a ball joint connection. When adjusting the wheel base, the shock absorber is inclined accordingly and is not easily subjected to the torque from the support . When the ball joint is used, the ball joint support is connected with the vehicle frame, and rubber gaskets are arranged on the contact surface, and the ball head of the ball joint is connected with the movable end of the shock absorber.

Each of the four wheels under the frame is provided with a set of driving mechanisms, the driving mechanism includes a hydraulic motor 9 with disc brakes and a travel reducer 5, the motor 9 is connected in series with the travel reducer 5, and the wheels 4 are mounted on the travel reducer. on the flange.

The middle part of the ground profiling cradle 3 preferably adopts a fish-belly beam structure, and the front and rear ends are circular arcs that bend toward the outside. The end of the ground profiling cradle 3 is hinged on the steering knuckle kingpin shaft 20, as shown in Figures 8, 9 and 10, in order to ensure the strength of the connection structure between the cradle 3 and the kingpin shaft 20, the ground profiling cradle The end of the frame 3 is provided with a frustum-shaped shaft cap 21 integrally formed with the cradle body. The upper end of the shaft cap 21 is open, and an end cap 22 is provided to block the opening. The upper end of the kingpin shaft 20 is installed in the shaft cap 21, and the end face is against the bottom of the inner wall of the shaft cap, and is locked in the shaft cap 21 by connecting members such as screws, and can only be connected with the cradle 3. Rotate between, prevent kingpin shaft 20 from breaking away from in the shaft cap.

The ground profiling cradle 3 is equipped with a reversing oil cylinder 7 on the inner surface near the end, the cylinder barrel of the reversing oil cylinder 7 is hinged with the ground profiling cradle 3 through a hinge support, and the piston rod of the reversing oil cylinder 7 protrudes One end and one end of the steering knuckle 10 are hinged through a rotating pair, and the other end of the steering knuckle 10 is fixedly installed on the kingpin shaft 20 through a flange. The lower part of the flange of the steering knuckle kingpin shaft 20 is provided with a square tube connected to the bucket-shaped wheel support frame 8, nested in the wheel support frame 8, and fixed with the wheel support frame 8 by bolts. The travel reducer 5 is fixed on the wheel support frame 8, and the side plates of the wheel support frame 8 protect the peripheral side of the motor 9. Driven by the reversing oil cylinder 7, the steering knuckle 10 pushes the kingpin shaft 20 and the wheel support frame 8 drives the wheel 4 to turn.

The vehicle frame 1 can be welded and supported by plates and pipes. When it is used on a boom sprayer, the front cab (the left side of Fig. 1) is installed in the front, the sprayer suspension and the spray boom are arranged in the back, and the medicine is placed in the middle frame. box, this design can reduce the impact of the medicine box shaking on the vehicle.

The chassis structure of the present invention is especially suitable for boom sprayers, and is also suitable for other agricultural machinery and mountain off-road vehicles for other field management operations.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Various changes and improvements. The protection scope of the present invention is defined by the appended claims, description and their equivalents.

Claims (10)

1. A balanced chassis structure of a plant protection machine with high ground clearance, including a vehicle frame (1) and wheels (4), characterized in that there are two left and right ground profiling cradles (3) longitudinally connecting the front and rear wheels, and the two ground imitation The cradles (3) are connected by a transverse center shaft (16). The ground copy cradle (3) can rotate around the center shaft (16). The outer ends of the frame (3) are respectively provided with a rocker arm (6), and the legs (1-1) below the frame (1) are connected with the movable end of the rocker arm (6) through a rotating pair, and the ground profiling cradle (3 ) are provided with shock absorbers (12) supporting and connecting the vehicle frame (1) at the front and rear ends. 2. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 1, characterized in that the bottom of the shock absorber (12) is connected to a hinge support (13), and the hinge support (13) ) is connected to the ground profiling cradle (3) through a slewing bearing (6). 3. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 1, characterized in that the central axis (16) is provided with a device for positioning the position of the ground profiling cradle (3) on the central axis (16). Adjustable locking mechanism. 4. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 3, characterized in that the adjustable locking mechanism of a set of ground profiling cradle (3) includes several limit rings (17) and a sliding Sleeve (15), the sliding sleeve (15) is sleeved on the central shaft (16), located inside the ground profiling cradle (3), one end of the sliding sleeve (15) is connected to the ground profiling cradle ( 3) Fixed connection, a limit ring (17) locks the other end of the sliding sleeve (15), and a limit ring (17) locks the outer end of the ground profiling cradle (3). 5. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 1, characterized in that the rocker arm (6) is fixed on the central shaft (16) through a spline connection structure. 6. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 1, characterized in that each wheel is provided with a set of driving mechanisms, and the driving mechanisms include hydraulic motors (9) with disc brakes and Travel reducer (5). 7. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 1, characterized in that the middle part of the ground profiling cradle (3) is a fish-belly beam structure, and the front and rear ends are bent toward the outside arc shape. 8. The balanced chassis structure of a plant protection machine with high ground clearance according to any one of claims 1-7, characterized in that the end of the ground profiling cradle (3) is hinged on the steering knuckle kingpin shaft (20 ), the ground profiling cradle (3) is provided with a reversing cylinder (7) on the inner side near the end, and the cylinder barrel of the reversing cylinder (7) is connected to the ground profiling cradle (3) through a hinge support. ) is hinged, the extended end of the piston rod of the reversing cylinder (7) is connected with one end of the steering knuckle (10) through a rotating pair, and the other end of the steering knuckle (10) is fixedly installed on the kingpin shaft (20) , through the driving of the reversing oil cylinder (7) to push the kingpin shaft (20) to drive the wheels to turn. 9. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 8, characterized in that, the end of the ground profiling cradle (3) is provided with a truncated cone-shaped shaft cap (21), and the main The upper end of the pin shaft (20) is installed and locked in the shaft cap (21). 10. The balanced chassis structure of a plant protection machine with high ground clearance according to claim 8, characterized in that a bucket-shaped wheel support frame (8) is provided to protect the peripheral side of the wheel drive motor (9), and the wheel support frame (8) It is fixedly connected to the bottom of the steering knuckle king pin shaft (20).