JPH0512364Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a shovel loader having a reach mechanism.

Conventional technology Reach-type shovel loaders and high-lift type shovel loaders with lift arms that are longer than the standard lift arm are used as shovel loaders that can load and unload loads from high places or far away (in front of the vehicle) despite their compact body. ing.

Problems that the invention attempts to solve Reach type shovel loader This type of shovel loader was published in 1986-20446.
The vehicle body pivot position c of the reach arm f, the vehicle body pivot position b of the lift cylinder l, the vehicle body pivot position d of the reach arm rear rod n, and an example thereof is shown in FIG. 4. Since the vehicle body pivot position e of the cylinder g is located behind the front axle a, if the steering device is a body refraction type, the vehicle body must be bent at the rear of the vehicle body pivot position e of the reach cylinder g. First, the wheelbase will inevitably become longer, which will impair the ability to turn around, which is an advantage of a refracting vehicle.

Also, when reach arm f swings toward the rear of the vehicle, reach arm f moves to near the side of the driver.
This gives the driver a sense of anxiety.

High lift type shovel loader An example is shown in FIG.

In this type, the lift arm j only moves around its center of rotation h, and the cargo is located further forward of the vehicle body than in the case of a standard vehicle. Therefore, the center of gravity of the cargo is farther away from the center of gravity of the vehicle, and as a result, when traveling with a load, it is less stable than a lift arm with a standard length, and pitting is more likely to occur. Further, as mentioned above, since the lift arm j is long, the effective turning radius, that is, the so-called wall-to-wall turning radius is large, which is inconvenient for work indoors or in factory premises.

Purpose of the invention This invention was devised in view of the above circumstances, and its purpose is to make it possible to make the steering position bendable on the vehicle body without making the wheelbase longer than necessary, and to make the reach arm To provide a shovel loader which can eliminate the feeling of anxiety given to a driver due to the reach arm coming close to the driver's side when the reach arm swings backward, and which is resistant to pitting and has excellent stability. .

Means and Effects for Solving Problems The shovel loader of the present invention connects a front body 1 having a front wheel 8 via a front axle 7 and a rear body 2 having a rear wheel 4 via a body bending mechanism 3. After that, a driving section 6 is provided on the vehicle body 2, and the lower end of the rod 14 is pivotally mounted at a position rearward of the front axle 7 in the front vehicle body 1 so as to be able to swing back and forth, and the rod 14 is connected to the vehicle body in the front vehicle body 1. The lower end of the reach arm 9 is pivotally attached to the intermediate position between the pivot point C and the front axle 7 so as to be able to swing back and forth, and the reach cylinder 43 is pivotally attached to the upper and lower middle of the reach arm 9 and the front vehicle body 1, The rear end of the lift arm 19 and the link plate 11 are pivotally connected to the upper end of the reach arm 9 by the same pin 13 so as to be able to swing back and forth, and the upper end of the rod 14 is pivotally connected to the link plate 11. The rod 14 and reach arm 9 are parallel, and the lift arm 1
A lift cylinder 23 is pivotally attached to the front and rear intermediate portions of the lift arm 19 and a position forward of the front axle 7 of the front vehicle body 1, and a bucket bracket 27 is pivotally attached to the front end of the lift arm 19 so as to be swingable back and forth. Attach the bucket 31 to the tilt cylinder 3 on the top bracket 27.
The link 3 is pivotally connected at 9 so as to be movable up and down, and the link 3
5 is pivoted parallel to the lift arm 19, and the vehicle body pivot point A of the lift cylinder 23 and the reach arm 9
The vehicle body pivot point B of the rod 14 and the vehicle body pivot point C of the rod 14 are set at approximately the same height as the center P of the front axle 7, and the vehicle body pivot point D of the reach cylinder 43 is located closer to the vehicle body bending mechanism 3 in the front vehicle body 1. be.

As a result, by swinging the reach arm 9 forward, the bucket 31 can be moved forward in parallel to the front vehicle body 1, and by swinging the lift arm 19 upward around the upper end of the reach arm 9, the bucket can be moved parallel to the front body 1. Lift arm 19 centered on the upper end of 9.
By swinging the bucket 31 upward, the bucket 31 can be moved upward in parallel, making it a shovel loader that can load and unload cargo from high or far places despite its compact body. Since the vehicle body pivot point A of the moving lift cylinder 23 is in a position forward of the front axle center P of the front vehicle body 1, the distance between the front axle center P of the front vehicle body 1 and the vehicle body bending mechanism 3 is shortened, and the front axle center P of the front vehicle body 1 is The distance between the axle center P and the center of the rear wheel 4, that is, the wheelbase, is shortened, and the advantage of the body refraction type shovel loader is the ability to turn around easily. The position is close to the front axle center P side in 1 and is at almost the same height, and since the driving part 6 is provided on the rear vehicle body 2, when the reach arm 9 is moved rearward, the reach arm 9 is located right next to the driving part 6. The reach arm 9 never moves to the side of the driver, and the driver does not feel uneasy. Since the vehicle body pivot portion C of No. 14 is approximately at the same height as the front axle center P,
When the lift cylinder 23 and reach arm 9 are swung back and forth, the oscillation angle can be increased without getting too close to the front axle 7, so the amount of forward and upward movement of the bucket 31 can be increased, and the amount of forward and backward tilting can be increased. The amount of inclination can be made almost equal, and furthermore, it is not only difficult for objects to get caught between the lift cylinder 23 and the front axle 7 and between the reach arm 9 and the front axle 7, but also it is easier for objects to fall and be ejected from between them. Furthermore, the vehicle body pivot portion A of the lift cylinder 23 and the vehicle body pivot portion B of the reach arm 9, on which a large load is applied during bucket work, are located near the front axle 7 of the front vehicle body 1, and similarly the vehicle body pivot portion D of the reach cylinder 43 is located near the front axle 7 of the front vehicle body 1. is located closer to the vehicle body bending mechanism 3 in the front vehicle body 1, and since the parts near the front axle 7 and the vehicle body bending mechanism 3 in the front vehicle body 1 have high rigidity, each of the above-mentioned parts will be damaged by the large load applied during bucket work. Each of the vehicle body pivot parts A in the front vehicle body 1
There is no need to specially reinforce B and C to increase rigidity.

Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 3. FIG. 1 shows a side view of a shovel loader according to the present invention. In the drawing, 1 is the front vehicle body, 2 is the rear vehicle body, and the front and rear vehicle bodies 1 and 2 are the vehicle body bending mechanism 3.
are connected to each other via. The rear vehicle body 2 is provided with a rear wheel 4, a drive mechanism 5, a driving section 6, etc., and the front vehicle body 1 is provided with a front wheel 8 via a front axle 7.

The front part of the front body 1 extends beyond the upper part of the front axle 7 and protrudes forward from the front axle 7.
a, intermediate and rear pivot parts 1b and 1c are provided behind the center P of the front axle 7.

Further, a pivot portion 1e is provided on the rear upper side of the front vehicle body 1.

The lower end of the reach arm 9 is attached to the intermediate pivot 1b by a pin 10 so as to be able to swing back and forth, and the upper end of the reach arm 9 is connected to the pivot 12 on the front lower side of the link plate 11 by a pin 13. It has been done. Rod 1 is attached to the rear pivot portion 1c of the front body 1.
The lower ends of the rods 14 are connected by pins 15, and the upper ends of the rods 14 are connected to the rear lower pivot portion 16 of the link plate 11 by pins 17.
The reach arm 9 and the rod 14 are parallel to each other. The reach arms 9 and the rods 14 are a pair of left and right, and the left and right reach arms 9 are connected to each other by a cross member 18 at an intermediate portion thereof.

Front lower pivot portion 1 of the link plate 11
2 has a rear end portion of a lift arm 19 connected with a pin 13 so as to be able to rise and fall. The lift arms 19 are a pair of left and right lift arms 19, and the left and right lift arms 19 are connected to each other by cross members 20 and 21 at the front and rear of the intermediate portion. A pivot portion 22 is provided on the rear cross member 21.

A base end portion of a lift cylinder 23 is attached to the front pivot portion 1a of the front vehicle body 1 with a pin 24, and a piston rod 25 of the lift cylinder 23 is connected to the pivot portion 22 with a pin 26.

The front end of the lift arm 19 is connected by a pin 29 to a pivot 28 on the rear lower side of a bucket bracket 27, and a rear bracket 32 of a bucket 31 is connected to a pivot 30 on the front lower side of the bucket bracket 27. are connected by a pin 33. The upper end of a link 35 is connected to the upper pivot 34 of the link plate 11 with a pin 36, and the lower end of the link 35 is connected to the upper pivot 37 of the bucket bracket 27 with a pin 38. It's hot,
The lift arm 19 and link 35 are parallel to each other. A tilt cylinder 39 is provided at the middle of the bucket bracket 27, and a piston rod 40 of the tilt cylinder 39 is attached to a bracket 4 protruding from the center of the back surface of the bucket 31.
1 with a pin 42.

A base end portion of a reach cylinder 43 is attached to the pivot portion 1e of the front vehicle body 1 with a pin 44, and a piston rod 45 of the reach cylinder 43 is attached to the pivot portion 4 provided on the cross member 18 of the reach arm 9.
6 with a pin 47.

Note that 48 in FIG. 1 is a drive shaft.

The pin 24 constitutes the vehicle body pivot point A of the lift cylinder 23, the pin 10 constitutes the vehicle body pivot point B of the reach arm 9, the pin 15 constitutes the vehicle body pivot point C of the rod 14, and the pin 44 constitutes the vehicle body pivot point of the reach cylinder 43. The vehicle body pivot point D is located near the vehicle body bending mechanism 3 in the front vehicle body 1, and the vehicle body pivot points A, B, and C are approximately at the same height as the front axle center P.

Since the vehicle body pivot point A of the lift cylinder 23 is located in front of the front axle 7, the vehicle body pivot point D of the reach cylinder 43 is closer to the front axle 7 side, and the vehicle body pivot point of the reach arm 9 is located in front of the front axle 7. B and the vehicle body pivot point C of the rod 14 are also approaching the front axle 7 side.

Next, the operation will be explained.

By extending the reach cylinder 43, the reach arm 9 is rotated forward about the vehicle body pivot point B, and the bucket 31 is moved through the lift arm 19.
move forward. At this time, the rod 14 and the lift cylinder 23 rotate forward about the vehicle body pivot points C and A, and operate as shown by the imaginary lines in FIG. 2 to perform the work of scooping up dirt and stones.

Furthermore, the lift arm 19 is lifted by the extension of the lift cylinder 23, and the bucket 31 is rotated downward by the contraction of the tilt cylinder 39, thereby loading soil and stones.

Effects of the invention By swinging the reach arm 9 forward, the bucket 31 can be moved forward in parallel to the front vehicle body 1, and by swinging the lift arm 19 upward around the upper end of the reach arm 9. Bucket 31
Because it can move upward in parallel, it becomes a shovel loader that can load and unload cargo from high or remote locations, despite its compact body.

Since the vehicle body pivot portion A of the lift cylinder 23 that swings the lift arm 19 up and down is located forward of the front vehicle axis center P of the front vehicle body 1, there is a gap between the front axle center P of the front vehicle body 1 and the vehicle body bending mechanism 3. The distance between the front axle center P and the rear wheel 4 center, that is, the wheelbase, becomes shorter.
The advantage of the body refraction type shovel loader, which is the ability to turn in a small radius, is not impaired.

The vehicle body pivot portion B of the reach arm 9 is located close to the front axle center P side of the front vehicle body 1 and is approximately at the same height, and since the driving section 6 is provided on the rear vehicle body 2, the reach arm 9 cannot be swung rearward. When the reach arm 9 moves, the reach arm 9 does not move to the side of the driving part 6, and the reach arm 9 does not come close to the side of the driver, so that the driver does not feel uneasy.

Since the vehicle body pivot portion A of the lift cylinder 23, the vehicle body pivot portion B of the reach arm 9, and the vehicle body pivot portion C of the rod 14 are approximately at the same height as the front axle center P, the lift cylinder 23 and the reach arm 9 can be rocked back and forth. When moving, the swinging angle can be increased without getting too close to the front axle 7, so the amount of forward and upward movement of the bucket belt 31 can be increased, the amount of forward tilt and the amount of rearward tilt can be made almost equal, and furthermore, the lift cylinder 23 can be moved forward and upward. and front axle 7
Not only is it difficult for objects to get caught between the reach arm 9 and the front axle 7, but it also becomes easier for objects to fall and be ejected from between them.

That is, the vehicle body pivot portion A of the lift cylinder 23, the vehicle body pivot portion B of the reach arm 9, and the rod 14.
If the vehicle body pivot point C is lower than the front axle center P, when the lift cylinder 23 and reach arm 9 are swung back and forth, they will come very close to the front axle 7, making it impossible to obtain a large oscillation angle. It is not possible to increase the amount of movement, it is necessary to reduce either the amount of forward tilt or the amount of rearward tilt, and furthermore, there is a gap between the lift cylinder 23 and the front axle 7 and between the reach arm 9 and the front axle 7. Not only are they easy to get stuck in, but it is also difficult to remove objects from between them.

The vehicle body pivot portion A of the lift cylinder 23 and the vehicle body pivot portion B of the reach arm 9, on which a large load is applied during bucket work, are located near the front axle 7 of the front vehicle body 1, and similarly, the vehicle body pivot portion D of the reach cylinder 43 is located near the front vehicle body. In addition, the parts near the front wheels 7 and the car body bending mechanism 3 in the front car body 1 have high rigidity, so each part will not be damaged or deformed by the large load applied during bucket work. There is no need to specifically reinforce the respective vehicle body pivot parts A, B, and C in the front vehicle body 1 to increase their rigidity.

[Brief explanation of drawings]

Figure 1 is a side view of one embodiment of the present invention, Figure 2 is a side view of the main parts, Figure 3 is a plan view of the same, Figures 4 and 5.
Each figure is a side view of a conventional shovel loader. 7 is the front axle, 9 is the reach arm, 19 is the lift arm, 23 is the lift cylinder, and A and B are the vehicle body pivot points.

Claims (1)

[Claims for Utility Model Registration] Front vehicle body 1 with front wheels 8 provided via a front axle 7
A rear vehicle body 2 with rear wheels 4 is connected to a vehicle body bending mechanism 3.
After that, a driving section 6 is provided on the vehicle body 2, and a lower end of a rod 14 is pivotally connected to a position rearward of the front axle 7 in the front vehicle body 1 so as to be swingable back and forth, and the rod 14 in the front vehicle body 1 is The lower end of the reach arm 9 is pivotally attached to the intermediate position between the vehicle body pivot point C of 14 and the front axle 7 so as to be able to swing back and forth, and the reach cylinder 43 is pivoted between the upper and lower intermediate points of the reach arm 9 and the front vehicle body 1. The rear end of the lift arm 19 and the link plate 11 are pivotally connected to the upper end of the reach arm 9 using the same pin 13 so as to be able to swing back and forth, and the upper end of the rod 14 is pivotally attached to the link plate 11. Then, the rod 14 and the reach arm 9 are parallel to each other, and a lift cylinder 23 is pivotally connected between the front and rear of the lift arm 19 and a position forward of the front axle 7 of the front vehicle body 1, and the lift cylinder 23 is attached to the front end of the lift arm 19. A bucket bracket 27 is pivotally attached to the bucket bracket 27 so as to be swingable back and forth, and the bucket bracket 27 is attached to the bucket bracket 27.
1 is pivotally connected to be movable up and down by a tilt cylinder 39, and a link 35 is pivotally connected in parallel to the lift arm 19 across the link plate 11 and the bucket bracket 27, and the vehicle body pivot point A of the lift cylinder 23 and The vehicle body pivot point B of the reach arm 9 and the vehicle body pivot point C of the rod 14 are set at approximately the same height as the center P of the front axle 7, and the vehicle body pivot point D of the reach cylinder 43 is set closer to the vehicle body bending mechanism 3 in the front vehicle body 1. A shovel loader characterized by being located at.