CN110965598B

CN110965598B - Electric shovel crane arm connecting structure

Info

Publication number: CN110965598B
Application number: CN201911403877.4A
Authority: CN
Inventors: 张明; 张松; 许炼; 张春雷; 王宏亮; 范晓燕; 徐智博
Original assignee: Jinduicheng Molybdenum Co Ltd
Current assignee: Jinduicheng Molybdenum Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2023-05-26
Anticipated expiration: 2039-12-31
Also published as: CN110965598A

Abstract

The invention discloses a connecting structure of a lifting arm of an electric shovel, which comprises two rib plates respectively connected to two sides of the lifting arm of the electric shovel, wherein one end of each rib plate, which is close to an upper disc of the electric shovel, is sequentially connected with a bottom plate, a base and a steel sleeve, pins with two ends extending outwards are sleeved in the steel sleeve, lacing wire joints and lug seats fixed on the upper disc of the electric shovel are respectively sleeved at two ends of the pins, which are positioned outside the steel sleeve, lacing wire joints are connected with lacing wires penetrating through the bottom plate at one ends, which are far away from the pins, of the lacing wires, and one ends, which penetrate through the bottom plate, of the lacing wires are provided with damping devices and are locked through nuts. The connecting structure of the electric shovel boom reduces the swing amplitude of the electric shovel boom and the stress condition of the boom support leg, thereby reducing the wear rate of the boom support leg, improving the equipment perfection rate, reducing the manpower and material resource consumption caused by overhaul and improving the mine production efficiency.

Description

Electric shovel crane arm connecting structure

Technical Field

The invention belongs to the technical field of surface mining equipment, and particularly relates to a crane boom connecting structure of an electric shovel.

Background

In the surface mine exploitation process, an electric shovel is main mining equipment. The existing common lifting arm connecting structure of the WK-4A electric shovel is of a narrow-span double-lacing wire structure, and has design defects, and during the shovel loading process, the lifting arm is stressed and swung due to mechanical operation, so that the supporting legs of the lifting arm are abnormally worn, the root shafts of the supporting legs are bent to fracture, and equipment accidents of lacing wire fracture can occur. Affecting the normal production of strip mines. Therefore, the design of the novel connecting structure of the electric shovel boom has important significance for improving the equipment integrity and reducing the cost of manpower and material resources and the safety risk.

Disclosure of Invention

The invention aims to provide a connecting structure of an electric shovel crane arm, which solves the problem of abnormal abrasion of the supporting legs of the existing crane arm.

The technical scheme adopted by the invention is as follows: the utility model provides an electric shovel boom connection structure, including connecting respectively in two gusset of electric shovel boom both sides, every gusset is close to the one end of electric shovel upper disc and has connected gradually bottom plate, base and steel bushing, the pin that outwards stretches out in the steel bushing has cup jointed both ends, the pin is located the outer both ends of steel bushing and has cup jointed lacing wire joint and the ear seat that is fixed in on the electric shovel upper disc respectively, lacing wire joint keeps away from the one end of pin and is connected with the lacing wire that passes the bottom plate, the one end that the lacing wire passed the bottom plate is installed damping device and is locked through the nut.

The present invention is also characterized in that,

the damping device comprises a plurality of washers sleeved on the lacing wire, and two adjacent washers are respectively 45# steel washers and rubber washers.

Seven pieces of 45# steel washers and rubber washers.

The thickness of the rubber gasket is 50% thicker than that of the 45# steel gasket.

The positions outside the pin and at the two sides of the lacing wire joint are sheathed with lacing wire supports fixed on the upper disc of the electric shovel.

The bottom plate is perpendicular with the length direction of the lifting arm, and a round hole for the lacing wire to pass through is formed in the bottom plate.

The base is connected with the steel sleeve in a semicircular structure which is concave inwards.

The two ends of the pin are inserted with pins along the radial direction.

Both ends of the lacing wire are connected with the lacing wire joint and the screw cap through fine threads.

The nuts are arranged in parallel.

The beneficial effects of the invention are as follows: according to the electric shovel boom connecting structure, the dead weight of the electric shovel boom and impact load in the working process are reduced, and part of the impact load is transmitted to the upper disc of the electric shovel through the rib plate, the bottom plate, the base, the steel sleeve, the pin and the lug seat (the lacing wire support); the damping device composed of the lacing wire joint, the lacing wire, the 45# steel gasket and the rubber gasket absorbs the left-right swinging kinetic energy of the lifting arm, reduces the impact load and the swinging amplitude, reduces the abrasion speed of the supporting foot of the lifting arm, and avoids bending and breaking of the root shaft of the supporting foot.

Drawings

FIG. 1 is a schematic view of the structure of the present invention for the attachment of the lift arms of an electric shovel;

FIG. 2 is a side view of the attachment structure of the lift arm of the electric shovel of the present invention of FIG. 1;

FIG. 3 is a view showing the use of the boom linkage structure of the electric shovel according to the present invention.

In the figure, the electric shovel boom is 1, the rib plate is 2, the electric shovel upper disc is 4, the bottom plate is 5, the base is 6, the steel sleeve is 7, the pin is 8, the lacing wire joint is 9, the lug seat is 10, the lacing wire is 11, the nut is 12.45 # steel gasket, 13, the rubber gasket is 14, the lacing wire support is 15, the pin is 16, the boom support leg is 17, and the support leg root shaft is provided.

Detailed Description

The invention will be described in detail with reference to the accompanying drawings and detailed description.

The invention provides a connecting structure of an electric shovel boom, which is shown in figures 1 to 3, and comprises two rib plates 2 respectively connected to two sides of the electric shovel boom 1, wherein one end of each rib plate 2, which is close to an upper plate 3 of the electric shovel, is sequentially connected with a bottom plate 4, a base 5 and a steel sleeve 6, a pin 7 with two ends extending outwards is sleeved in the steel sleeve 6, two ends of the pin 7, which are positioned outside the steel sleeve 6, are respectively sleeved with a lacing wire joint 8 and an ear seat 9 fixed on the upper plate 3 of the electric shovel, one end, which is far away from the pin 7, of the lacing wire joint 8 is connected with a lacing wire 10 penetrating through the bottom plate 4, and one end, which penetrates through the bottom plate 4, of the lacing wire 10 is provided with a damping device and is locked through a nut 11.

The damping device comprises a plurality of washers sleeved on the lacing wire 10, two adjacent washers are respectively a 45# steel washer 12 and a rubber washer 13, seven washers are preferably selected from the 45# steel washer 12 and the rubber washer 13, and the thickness of the rubber washer 13 is 50% thicker than that of the 45# steel washer 12.

The bottom plate 4 is perpendicular to the length direction of the crane boom 1, and a round hole for the lacing wire 10 to pass through is formed in the bottom plate 4. The connection position of the base 5 and the steel sleeve 6 is of a semicircular structure which is concave inwards, and the base 5 is pressed on the steel sleeve 6 through the structure. The two ends of the pin 7 are inserted with pins 15 along the radial direction, so as to prevent the pin 7 from being fleed. The two ends of the lacing wire 10 are connected with the lacing wire joint 8 and the screw cap 11 through fine threads, the fine threads have good anti-loosening effect compared with common threads, the screw caps 11 are arranged in parallel, the lacing wire 10 is further prevented from loosening in a double-screw cap locking mode, and the normal use of the damping device is ensured.

The positions of the pins 7, which are positioned at the two sides of the lacing wire joint 8, are sleeved with lacing wire supports 14 which are fixed on the upper plate 3 of the electric shovel, and the lacing wire supports 14 can be obtained by adopting the lacing wire supports of the electric shovel which retain the original WK-4A type.

When the electric shovel crane boom 1 works, the load of the electric shovel crane boom is self-weight, and impact load in the working process is partially reduced by the rib plate 2, the bottom plate 4, the base 5, the steel sleeve 6, the pin 7, the ear seat 9 (the lacing wire support 14) and the electric shovel upper disc 3; the damping device composed of the lacing wire joint 8, the lacing wire 10, the 45# steel gasket 12 and the rubber gasket 13 absorbs the left and right swinging kinetic energy of the electric shovel boom 1, reduces impact load and swinging amplitude, reduces the abrasion speed of the boom supporting foot 16, and avoids bending and breaking of the supporting foot root shaft 17.

Through the mode, the electric shovel boom connecting structure reduces the swing amplitude of the electric shovel boom 1 and the stress condition of the boom supporting legs 16, so that the abrasion rate of the boom supporting legs 16 is reduced, the equipment perfection rate is improved, the manpower and material resource consumption caused by overhaul is reduced, and the mine production efficiency is improved.

Claims

1. The utility model provides a shovel jib loading boom connection structure, a serial communication port, including connecting respectively in two gusset (2) of shovel jib loading boom (1) both sides, the one end that every gusset (2) is close to shovel upper disc (3) has connected gradually bottom plate (4), base (5) and steel bushing (6), pin (7) that outwards stretches out in both ends have been cup jointed in steel bushing (6), pin (7) are located the both ends outside steel bushing (6) have cup jointed lacing wire joint (8) respectively and are fixed in ear seat (9) on shovel upper disc (3), lacing wire joint (8) keep away from the one end of pin (7) and are connected with lacing wire (10) that pass bottom plate (4), damping device is installed and lock through nut (11) to the one end that lacing wire (10) passed bottom plate (4), damping device includes a plurality of washers that overlap on lacing wire (10), two adjacent washers are 45# steel washers (12) and rubber washers (13) respectively, 45# steel washers (12) and rubber washers (13) are seven, thickness of rubber washers (13) are more than 45# steel washers (50%).

2. The electric shovel boom connecting structure according to claim 1, wherein the positions outside the pin (7) at the two sides of the lacing wire joint (8) are sleeved with lacing wire supports (14) fixed on the upper disc (3) of the electric shovel.

3. The electric shovel boom connecting structure according to claim 1, wherein the bottom plate (4) is perpendicular to the length direction of the boom (1), and a round hole for the lacing wire (10) to pass through is formed in the bottom plate (4).

4. The electric shovel boom coupling structure according to claim 1, wherein the base (5) is connected to the steel sheath (6) in a semi-circular structure recessed inwards.

5. The electric shovel boom coupling structure according to claim 1, characterized in that both ends of the pin (7) are radially inserted with pins (15).

6. The electric shovel boom coupling structure according to claim 1, wherein both ends of the tie bar (10) are connected with the tie bar joint (8) and the nut (11) by fine threads.

7. An electric shovel boom coupling structure according to claim 1 or 6, characterized in that said nuts (11) are provided in parallel in two.