JPH0612969Y2 - Hydraulic suspension cylinder racket mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a structure for mounting a bracket for supporting a hydraulic suspension cylinder used in a suspension system of a vehicle, in particular, a crane vehicle on the frame.

(Conventional technology and its problems) The all-terrain crane vehicle is a crane vehicle that incorporates the traveling characteristics of a truck crane vehicle and the mobility of a rough-terrain crane vehicle, and its structural function is similar to that of a rough-terrain crane. And has an all-wheel drive function (4WD) and an all-wheel steering function (4WD). In addition, the suspension system (suspension) lifts a 6-ton load according to the crane specifications.
Since it is required to be able to move at a vehicle speed of 4 km / h or less, as shown in FIG. 5, a hydraulic cylinder 41 is mounted in parallel with the taper leaf spring 40 to connect the side surface of the frame 42 and the axle 43. And the hydraulic cylinder 41 acts on the contraction side to bend the leaf spring 40 to a stopper (not shown).
3 and 3 are fixed by hydraulic pressure, and the suspension lock function is provided so as to stabilize the undercarriage during rough road traveling to stabilize traveling.

As shown in FIGS. 6 to 8, the method of mounting the hydraulic cylinder 41 on the frame 42 is as follows. Two brackets are provided on the outer surface of the outer plate 45 of the frame 42 at intervals slightly wider than the diameter of the hydraulic cylinder 41. 46, 46 are juxtaposed and one end face is welded to the outer plate 45, and large-diameter and thick-walled bosses 47, 47 are formed on the inner peripheral edges of the holes formed in the upper portions of the brackets 46, 46. The hydraulic cylinder 41 is provided between the brackets 46 and 46, which are opposed to each other and fixed by welding.
And a bracket 41a formed on the cylinder bottom is interposed between the bosses 47 and 47, and a pin 48 is inserted into each hole of the bracket 46, the boss 47, and the bracket 41a, and the bottom of the cylinder 41 is inserted. Frame 4 on the side
It is designed to be rotatably pivoted to 2.

In the mounting structure of the hydraulic cylinder to the frame, since the brackets 46, 46 are welded to the outer surface of the outer plate 45 of the frame 42, a large stress is applied to the outer plate 45 when the suspension is locked, and the outer plate 45 is bulged and deformed to the outside. Therefore, the bracket 46 is enlarged as shown in FIG. 6 and FIG. 7 to increase the welding length with the outer surface of the outer plate 45 so that the outer plate 45 is bulged outward due to the stress and the deformation. It is designed to prevent the occurrence of cracks due to Further, since the hydraulic cylinder 41 is disposed between the two brackets 46 and 46, the distance between the brackets 46 and 46 is widened, and as a result, each bracket 46 has a large diameter and thick boss 45. Is welded and the diameter of the pin 48 is increased to cope with the bending stress applied to the pin 48. As a result, there is a problem that the bracket 46 becomes large and heavy.

The present invention has been made to solve the above-described problems, and provides a mounting structure for a hydraulic suspension cylinder bracket that is designed to reduce the size and weight of a bracket that supports one end of a hydraulic suspension cylinder on a side member of a frame. The purpose is to do.

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, a hydraulic suspension cylinder, which is welded to an outer plate of a side member of a frame having a box sectional structure and has one end attached to an axle, is provided. Welding of the bracket supporting the end to the outer plate At least a part of the end face is projected to insert a slit formed in the outer plate, and is directly welded and fixed to a rib for fixing the outer plate and the inner plate of the frame. It has a structure that

(Function) By directly welding and fixing at least a part of the welding end surface of the outer plate of the bracket that supports the other end of the hydraulic suspension cylinder to the side member of the frame, to the rib that fixes the outer plate and the inner plate of the side member. The load applied to the outer plate when the suspension is locked is reduced, and the outer plate is prevented from bulging outward. As a result, the bracket can be reduced in size and weight.

Embodiment An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the appearance of an all-terrain crane vehicle to which the present invention is applied. An all-terrain crane vehicle 1 is equipped with a crane 5 via a turntable 4 on a working frame (main frame) 2 extending over substantially the entire vehicle length. The carrier house 6 is attached to the front frame 3 extending forward from the front end of the main frame 4, and the crane 5 is attached to the turntable 4.
Crane houses 7 that rotate together are provided respectively, and the operation of the crane vehicle 1 is possible in each of the houses 6, 7.

At the time of suspending the crane 5, the front outriggers 8 and the rear outriggers 9 attached to the front and rear ends of the main frame 2 are laterally laterally extended to fix the main frame 2, and the suspending work is performed. Then, large single tires 10 and 11 are attached between the outriggers 8 and 9 and adjacent to the outriggers 8 and 9. A front axle 13 to which the front wheel 10 is attached and a rear axle 14 to which the rear wheel 11 is attached are suspended on the main frame 2 via taper leaf springs 15 and 16, respectively, and stabilizers 17 and 18 having high rigidity.
Rolling is suppressed by.

The front axle 13 and the rear axle 14 are supported on the side wall of the side member 2a of the main frame 2 by a pair of left and right hydraulic suspension cylinders (hereinafter simply referred to as hydraulic cylinders) 20 and 24, respectively. These hydraulic cylinders 20 and 24 are tapered leaf springs 15 and 1,
It has a suspension lock function, a shock absorber function, and an anti-nose dive function when braking or turning in cooperation with the 6.

The main frame 2 has a box-section welded structure that is strong against loads and twists during work, and the side member 2a
As shown in FIG. 2, the outer plate 30, the inner plate 31, the upper plate 32 and the lower plate 33 are formed in a box shape, and a reinforcing rib 34 is provided between the outer plate 30 and the inner plate 31. Are arranged at intervals. Each of these plates 30-33
The rib 34 and the rib 34 are firmly fixed to each other by welding.

As shown in FIGS. 2 and 3, the outer plate 30 is positioned slightly above the center and in the vertical direction with a width slightly wider than the wall thickness of the bracket 21 provided on the cylinder bottom of the hydraulic cylinder 20. Slit 3 of a predetermined length
0a and 30a are drilled. Further, the outer plate 30 is located at the position of each of the slits 30a, 30a.
Ribs 34, 34 for fixing the inner plate 31 and the inner plate 31 are provided. Each of these ribs 34, 34 is formed with a vertically elongated rectangular notch 34a, 34a on each end face welded to the outer plate 30 so as to face each slit 30a, 30a of the outer plate 30.

As shown in FIGS. 2 and 3, the brackets 35, 35 have their upper ends cut obliquely, and the slits 30a of the outer plate 30 are attached to the respective end surfaces of the side member 2a that are welded to the outer surface of the outer plate 30. Insert it in 30a,
And notches 34a, 34a of the ribs 34, 34 facing each other
Fitting portions 35a, 35a for fitting to are projectedly provided. Further, holes 35b, 35b are formed at predetermined positions in each of the brackets 35, 35.

Each of these brackets 35, 35 has a respective fitting portion 35.
a and 35a are fitted from the outer side of the outer plate 30 into the notches 34a and 34a of the ribs 34 and 34, which penetrate through the slits 30a and 30a of the outer plate 30 and face each other. Rib 3 on the end face of 35a
It is welded to the end faces of the notches 34 a and 34 a of the Nos. 4 and 34.
That is, the brackets 35, 35 are firmly welded and fixed directly to the ribs 34, 34. Further, each bracket 35, 35
Is welded and fixed to the outer surface of the outer plate 30 at the upper end surface of the fitting portion 35a, and each slit 30a, 30a
It is also welded and fixed to the periphery of each. Also, each bracket 3
Upper ends of the reference numerals 5 and 35 are welded and fixed by an upper plate 36 to prevent the upper portions from bending due to a load. In this way, the two brackets 35, 35 are firmly welded and fixed to the rib 34 of the side member 2a and the outer plate 30.

As shown in FIGS. 2 to 4, the hydraulic cylinder 20 has a bracket 21 formed on the cylinder bottom, which is fitted between the two brackets 35, 35 with a slight gap therebetween, and both ends thereof are respectively attached to the brackets 35, 35. It is fixed to the holes 35a, 35a and is rotatably supported by a pin 37 which penetrates the center of the hole 21a of the bracket 21 with a slight clearance.
Further, the tip 22a of the rod 22 of the hydraulic cylinder 20
Is connected to the front axle 13 (FIG. 1).
In this way, the hydraulic cylinder 20 includes the side member 2a, that is, the outer plate 30 and the front axle 13.
And are connected.

The cylinder bottom side of the hydraulic cylinder 24 arranged between the side member 2a and the rear axle 14 is also supported by the side member 2a in the same manner as the hydraulic cylinder 20.

The operation will be described below.

When the front, rear, left and right hydraulic cylinders 20 and 24 are released, the front axle 13 and the rear axle 14 are supported by the spring force of the respective leaf springs 15 and 16, and the suspension system is unlocked. Further, the hydraulic cylinders 20 and 24 are shortened so that the leaf springs 15 and 1 are shortened.
The suspension is locked by bending 6 to a stopper (not shown) and fixing the frame 2, the front axle 13, and the rear axle 14 by hydraulic pressure. As a result, the undercarriage becomes stiff when traveling on rough roads, and traveling is stabilized.

When the suspension is locked, a large load is applied to the brackets 35, 35 that support the cylinder bottoms of the hydraulic cylinders 20, 24. However, since the brackets 35, 35 are directly welded and fixed to the ribs 34, 34 of the side member 2a, the force of outwardly bulging and deforming the outer plate 30 is greatly reduced. This prevents the outer plate 30 from being deformed when the suspension is locked.

(Effects of the Invention) As described above, according to the present invention, the bracket of the hydraulic suspension cylinder, which is welded to the outer plate of the side member of the frame having the box cross-section structure and has one end attached to the axle, supports the other end of the bracket. Since at least a part of the welding end surface of the outer plate is projected and the slit formed in the outer plate is inserted, the suspension is directly welded and fixed to the rib for fixing the outer plate and the inner plate of the frame. The force applied to the outer plate during locking can be significantly reduced, and as a result, it is possible to prevent the outer plate from bulging and deforming even when the brackets are made smaller, and Small,
There is an effect that the weight can be reduced and the support structure of the hydraulic suspension cylinder can be made compact.

[Brief description of drawings]

FIG. 1 is a side view of an all-terrain crane vehicle to which the present invention is applied, and FIG. 2 is a side view showing an embodiment of an attachment structure of a hydraulic suspension cylinder bracket to a side member of a frame according to the present invention, and FIG. Is the arrow III-III in FIG.
FIG. 4 is a cross-sectional view, FIG. 4 is a partial cutaway view of a connecting portion between the bracket and the hydraulic cylinder shown in FIG. 2, FIG. 5 is a front view showing a main part of the hydraulic suspension device, and FIG. 6 is a conventional hydraulic suspension device. FIG. 7 is a view showing a mounting structure of the hydraulic cylinder to the frame, FIG. 7 is a side view of FIG. 6, and FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 1 ... All-terrain mobile crane, 2 ... Main frame, 2a ... Side member, 13 ... Front axle, 14 ... Rear axle, 20, 24 ... Hydraulic cylinder, 30 ... Outer plate, 31 ... Inner Plate, 32 ... Upper plate, 33 ... Lower plate,
34 ... rib, 35 ... bracket, 36 ... upper plate, 37 ... pin.

Claims (1)

[Scope of utility model registration request] 1. A bracket, which is welded to an outer plate of a side member of a frame having a box cross-section structure and has one end that supports the other end of a hydraulic suspension cylinder, has at least a part of its welded end face with the outer plate. A mounting structure for a hydraulic suspension cylinder bracket, characterized in that it is protruded and inserted through a slit formed in the outer plate, and is directly welded and fixed to a rib for fixing the outer plate and the inner plate of the frame.