CN202380493U

CN202380493U - Movable arm of excavating machine and excavating machine comprising movable arm

Info

Publication number: CN202380493U
Application number: CN2011205337649U
Authority: CN
Inventors: 席春玲; 石慧勇; 刘瑞毅; 董锋军; 高建丽
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2012-08-15
Anticipated expiration: 2021-12-19

Abstract

The utility model provides a movable arm of an excavating machine and the excavating machine comprising the movable arm. The movable arm of the excavating machine comprises side plates, a middle support, a front support and a rear support, wherein the middle support is connected with the middles of the side plates; the front support and the rear support are respectively connected with the two end parts of each side plate in the length direction of the side plate; and one or more rib plates are on each side plate at the part connected with the middle support. As one or more rib plate are arranged on each side plate at the part connected with the middle support, the stress of the stress on the same part is greatly reduced, the phenomenon of stress concentration is alleviated effectively, the torsion resistance and the stress bearing capability are improved, the overall strength and the safety factor are increased, the possibility of cracking is low, the overall performance of a working device is improved, and the requirements of high strength excavation operation are met.

Description

Excavator swing arm and comprise the excavator of this swing arm

Technical field

The utility model relates to the excavator field, in particular to a kind of excavator swing arm and comprise the excavator of this swing arm.

Background technology

The hydraulic crawler excavator structure division comprises slewing equipment, running gear and is used for directly accomplishing the equipment of mining task.Wherein, equipment mainly comprises swing arm, dipper and scraper bowl.As depicted in figs. 1 and 2, swing arm mainly comprises preceding bearing 14, rear support 15, middle bearing 12, side plate 11 etc.

Hydraulic crawler excavator of the prior art is excavating or during smooth operation, the equipment stressing conditions is comparatively complicated, and wherein the scraper bowl side edge is when receiving lateral force; The moment of torsion that the swing arm body structure is produced is bigger; And in the swing arm body structure resistance to torsion at bearing place a little less than, the ability that meets with stresses is relatively poor, the bulk strength of middle bearing and side plate binding site is lower; Thereby; Therefrom the lap weld place (being scope shown in the a1 among Fig. 1) of bearing 12 and side plate 11 ftractures easily, and therefore Hydraulic Excavator's Boom safety factor of the prior art is lower, is difficult to satisfy the demand of high strength digging operation.

The utility model content

The excavator swing arm that the utility model provides that a kind of resistance to torsion is strong, the ability that meets with stresses strong, bulk strength and safety factor are higher and comprise the excavator of this swing arm; To solve the lap weld place cracking of easy therefrom bearing of excavator swing arm of the prior art and side plate; The arm safety coefficient is lower, is difficult to satisfy the technical problem of high strength digging operation demand.

To achieve these goals; An aspect according to the utility model; A kind of excavator swing arm is provided; Comprise side plate, the middle bearing that is connected with side plate middle part, preceding bearing and the rear support that is connected with the end, two ends along its length direction of side plate respectively, the junction that on side plate, is arranged in bearing is provided with one or more gusset.

Further, gusset is positioned at least one medial surface and/or at least one lateral surface of side plate.

Further, gusset is positioned on the medial surface of two side plates.

Further, gusset and side plate are through being welded to connect.

Further, the lower side position of bearing during gusset is arranged on.

Further, the curved extension of lower edge of bearing in the gusset edge.

Further, gusset relatively in the scope of extension angle a2 of central axis of bearing be 90 °≤a2≤180 °.

Further, width reduces gusset gradually to two ends by the middle part.

Further, side plate and middle bearing are welded to connect through overlap joint.

According to the utility model on the other hand, a kind of excavator is provided, has had excavator swing arm, excavator swing arm is above-mentioned excavator swing arm.

The utility model is provided with one or polylith gusset through on the swing arm side plate, being arranged in the bearing junction; Significantly reduce the stress value that is positioned at same position, alleviated the phenomenon that stress is concentrated effectively, improved the ability to bear of resistance to torsion and stress; Bulk strength and safety factor have been improved; Not easy to crack, improved the overall performance of equipment, satisfied the demand of high strength digging operation.

Description of drawings

Figure of description is used to provide the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:

Fig. 1 shows the sketch map of excavator swing arm in the prior art;

Fig. 2 shows the sectional view along boom length direction center line of excavator swing arm in the prior art;

Fig. 3 shows the sketch map according to the excavator swing arm of the utility model; And

Fig. 4 shows the sectional view along boom length direction center line according to the excavator swing arm of the utility model.

The specific embodiment

Below with reference to accompanying drawing and combine embodiment, specify the utility model.

Shown in Fig. 3 and 4; The excavator swing arm that the utility model provides; Comprise side plate 21, the middle bearing 22 that is connected with side plate 21 middle parts, the preceding bearing 24 and the rear support 25 that are connected with the end, two ends along its length direction of side plate 21 respectively; Wherein, on side plate 21, be arranged in bearing 22 junctions and be provided with gusset 23.Wherein, gusset 23 can be positioned at least one medial surface of side plate 21 and/or at least one lateral surface, preferably, is positioned on the medial surface of two said side plates 21.

Because swing arm is when receiving moment of torsion, middle bearing 22 concentrates in the angle a2 scope as shown in Figure 3, therefore with the binding site weakness of side plate 21; As shown in Figure 4; In bearing 22 joint welding be welded on the side plate 21, gusset 23 is welded on two medial surfaces of side plate 21 and the lower side position of bearing 22 in being welded in, gusset 23 along in the curved extension of lower edge of bearing 22; And width reduces gusset gradually to two ends by the middle part; Wherein, as shown in Figure 3, gusset 23 can be the unspecified angle between 90 °-180 ° with respect to the extension angle a2 of the central axis of middle bearing 22.

Adopt the excavator swing arm of the utility model; Can increase the interior intensity of angle a2 scope of swing arm as shown in Figure 3 more effectively; Relieve stresses is concentrated more effectively, improves stress ability to bear and resistance to torsion, improves bulk strength and safety factor; Therefore, can satisfy the demand of high strength digging operation better.

According to the utility model on the other hand, the excavator that provides has excavator swing arm, and wherein, excavator swing arm is above-mentioned excavator swing arm.

From above description, can find out that excavator swing arm of the utility model and the excavator that comprises this swing arm are provided with one or polylith gusset 23 through on swing arm side plate 21, being arranged in bearing 22 junctions; In one embodiment; Bearing 22 changes 62MPa with the stress value of side plate 21 junctions into by 156MPa of the prior art in making, has promptly reduced 94MPa, has significantly reduced the stress value that is positioned at same position; Alleviated the phenomenon that stress is concentrated effectively; Improve the ability to bear of resistance to torsion and stress, improved bulk strength and safety factor, not easy to crack; Improve the overall performance of equipment, satisfied the demand of high strength digging operation.

The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. excavator swing arm; Comprise side plate (21), the middle bearing (22) that is connected with said side plate (21) middle part, preceding bearing (24) and the rear support (25) that is connected with the end, two ends along its length direction of said side plate (21) respectively; It is characterized in that the junction of bearing (22) is provided with one or more gusset (23) in said side plate (21) is gone up and be said.

2. excavator swing arm according to claim 1 is characterized in that, said gusset (23) is positioned at least one medial surface and/or at least one lateral surface of said side plate (21).

3. excavator swing arm according to claim 1 is characterized in that, said gusset (23) is positioned on the medial surface of two said side plates (21).

4. excavator swing arm according to claim 1 is characterized in that, said gusset (23) and said side plate (21) are through being welded to connect.

5. excavator swing arm according to claim 4 is characterized in that, said gusset (23) is arranged on the lower side position of said middle bearing (22).

6. excavator swing arm according to claim 5 is characterized in that, said gusset (23) is along the curved extension of lower edge of said middle bearing (22).

7. excavator swing arm according to claim 6 is characterized in that, the scope of extension angle a2 of the central axis of bearing (22) was 90 °≤a2≤180 ° during said gusset (23) was said relatively.

8. excavator swing arm according to claim 6 is characterized in that, width reduces said gusset (23) gradually to two ends by the middle part.

9. according to each described excavator swing arm in the claim 18, it is characterized in that said side plate (21) and said middle bearing (22) are welded to connect through overlap joint.

10. an excavator has excavator swing arm, it is characterized in that, said excavator swing arm is according to each described excavator swing arm among the claim 1-9.