CN102877493A

CN102877493A - Excavator bucket rod

Info

Publication number: CN102877493A
Application number: CN2012104050617A
Authority: CN
Inventors: 李玉广
Original assignee: LIUGONG CHANGZHOU EXCVAVTOR CO Ltd; Guangxi Liugong Machinery Co Ltd
Current assignee: Guangxi Liugong Machinery Co Ltd; Liugong Changzhou Machinery Co Ltd; Liuzhou Liugong Excavators Co Ltd
Priority date: 2012-10-22
Filing date: 2012-10-22
Publication date: 2013-01-16
Anticipated expiration: 2032-10-22
Also published as: CN102877493B

Abstract

The invention relates to an excavator bucket rod. The invention constructs the excavator bucket rod in order to solve the problems of an existing bucket rod anti-colliding device that the rigidity requirement of a base plate is high and the base plate is easy to tear. The excavator bucket rod comprises an anti-colliding device; the anti-colliding device comprises the base plate and an anti-colliding strip; the length direction of the anti-colliding strip is the same as the length direction of the base plate; the bottom face of the anti-colliding strip is welded with the base plate; and the top face of the anti-colliding strip is provided with a groove for transversely penetrating through the anti-colliding strip. With the adoption of the arranged groove, the bending rigidity of the anti-colliding strip is weakened, so that the thickness requirement of the base plate is reduced, and the base plate and welding lines on the periphery of base plate are prevented from being torn due to too great rigidity when the bucket rod is bent.

Description

Excavator boom

Technical field

The present invention relates to a kind of excavator, relate in particular to a kind of excavator boom.

Background technology

Excavator is when carrying out digging operation, if the material in the scraper bowl is when being hard material such as bulk solid rock, this material may be run into the front end of dipper and cause the damage of dipper when receiving bucket.Damage in order to prevent dipper from suffering the material collision, at present at dipper front end lower cover welding anticollision device, this anticollision device comprises backing plate, is welded with the anti-collision bar at backing plate, and the length direction of backing plate and anti-collision bar is consistent with the length direction of dipper.But there is following shortcoming in this structure, namely dipper can occur bending and deformation at middle bearing hinge place when dipper work is stressed, backing plate herein and anti-collision bar also can be followed flexural deformation, backing plate will carry out the rigid curved that flexural deformation must overcome first the anti-collision bar, so when the rigidity of anti-collision bar improved, backing plate also will correspondingly improve its rigidity; The raising of backing plate rigidity will inevitably cause the thickness of backing plate to increase, and so just can prevent the cracking of backing plate and corresponding weld seam thereof.So the shortcoming of this anticollision device is: the rigidity requirement of backing plate is high, the thickness of slab cost is high; Also can cause tearing and the cracking of peripheral weld of backing plate if design value is improper.

Summary of the invention

The object of the invention is to require high, the problem of easily tearing and provide a kind of and include that cost is low, the excavator boom of the anticollision device that is difficult for tearing for backing plate rigidity in the existing dipper anticollision device.

Technical scheme of the present invention is achieved in that a kind of excavator boom of structure, comprise anticollision device, anticollision device comprises backing plate and anti-collision bar, the length direction of anti-collision bar is consistent with the backing plate length direction, weld mutually with backing plate the bottom surface of anti-collision bar, and the end face of anti-collision bar is provided with the groove that laterally runs through the anti-collision bar.By the groove of setting, reduce the bending stiffness of anti-collision bar, thereby reduce the thickness requirement of backing plate, tear too greatly backing plate and weld seam on every side because of rigidity when avoiding dipper crooked.

In the present invention, the groove floor on the anti-collision bar is recessed arc surface, and recessed arc surface can play the effect of transition, can not produce stress in groove and concentrate and cause the fracture of anti-collision bar when the bending of anti-collision bar.

In the present invention, the attachment weld between anti-collision bar and the backing plate is piecewise continuous weld seam, and the continuous weld seam of piecewise continuous weld seam and a whole piece is compared, and has the beneficial effect of further reduction anti-collision bar flexural rigidity.

In the present invention, the anti-collision bar is two or more, and groove is row or multiple row is arranged, and the straight line at every row groove place is mutually vertical with anti-collision bar length direction, like this can so that the rigidity point of weakness of all anti-collision bars with respect to backing plate at same position, obtain unified.

The beneficial effect that compared with prior art has is: by the rigidity of groove reduction anti-collision bar is set, the anti-collision bar is torn backing plate and near relevant weld seam when preventing the dipper bending, to reduce the thickness of backing plate, the saving cost.

Description of drawings

Fig. 1 is the structural representation of dipper front end of the present invention;

Fig. 2 is the partial enlarged drawing at C place among Fig. 1.

Component title and sequence number among the figure:

Dipper 1, anticollision device 2, middle bearing 3, backing plate 4, anti-collision bar 5, groove 6.

The specific embodiment

Below in conjunction with the description of drawings specific embodiments.

As shown in Figure 1, the front end of the lower cover of box dipper 1 is provided with anticollision device 2, anticollision device 2 is comprised of backing plate 4 and anti-collision bar 5, backing plate 4 welds mutually with the lower cover of dipper, anti-collision bar 5 has three and be parallel to each other, its length direction is consistent with the length direction of backing plate, the bottom surface of anti-collision bar 5 welds mutually with backing plate 4, the end face of every anti-collision bar 5 is provided with and is arranged at intervals with two grooves 6, groove 6 laterally runs through six grooves on 5, three anti-collision bars 5 of anti-collision bar and is two row and arranges, and every row are that straight line is arranged and this straight line is vertical with the anti-collision bar, as shown in Figure 2, the trench bottom of groove 6 is recessed arc surfaces.Anticollision device can be good at protecting dipper not to be subjected to material damaged in collision in the bucket in the dipper in the present embodiment; and when dipper is worked; when dipper bends at middle bearing 3 places; the anti-collision bar is because fluted 6 attenuation; the flexural rigidity of anti-collision bar 5 is weakened widely; anti-collision bar 5 is being opened the bending of reeded position; thereby avoid the anti-collision bar to tear near the weld seam of being correlated with backing plate or the anti-collision bar; because the rigidity of anti-collision bar 5 is weakened; therefore can reduce the thickness of backing plate 4, thereby save cost.

In the present embodiment, every anti-collision bar 5 is by the welding of multistage weld seam with the welding of backing plate 4, has the gap between adjacent two weld seams, can avoid like this between anti-collision bar and the backing plate commissure stress to occur and concentrate, and causes weld seam to tear.

Claims

1. excavator boom, comprise anticollision device, described anticollision device comprises backing plate and anti-collision bar, the length direction of described anti-collision bar is consistent with the backing plate length direction, weld mutually with described backing plate the bottom surface of described anti-collision bar, it is characterized in that the end face of described anti-collision bar is provided with the groove that laterally runs through the anti-collision bar.

2. excavator boom according to claim 1, the bottom surface that it is characterized in that described groove is recessed arc surface.

3. excavator boom according to claim 1 is characterized in that the attachment weld between described anti-collision bar and the backing plate is piecewise continuous weld seam.

4. excavator boom according to claim 1 is characterized in that described anti-collision bar is two or more, and described groove is row or multiple row is arranged, and the straight line at every row groove place is mutually vertical with described anti-collision bar length direction.