阅读说明：本技术 挖掘机拖链轮与安装座结构总成 (Excavator drag sprocket and mount pad structure assembly ) 是由 王绪桥 李永刚 庞朝利 吴书建 张丽丽 鲍廷朋 王维昌 陈廷 于 2020-06-28 设计创作，主要内容包括：本发明公开了挖掘机拖链轮与安装座结构总成,包括拖链轮、拖链轮安装座,所述拖链轮包括拖链轴及安装在拖链轴上的左半拖链轮轮体、右半拖链轮轮体,还包括：连接座,所述连接座开设拖链轴安装孔,拖链轮的拖链轴穿入连接座的拖链轴安装孔中,所述连接座开设螺栓安装孔；所述拖链轮安装座上端面开设螺纹孔,用紧固螺栓依次装入连接座的安装孔、拖链轮安装座的螺纹孔,即所述紧固螺栓将连接座与拖链轮安装座紧固连接。本发明结构简化、成本降低显著、方便加工、易于装配、综合机械性能得到整体提高。挖掘机拖链轮与安装座结构总成主要用于托起上部履带,防止其下垂,同时辅佐履带总成顺着设定运动轨迹运行。(The invention discloses an excavator drag chain wheel and mounting seat structure assembly, which comprises a drag chain wheel and a drag chain wheel mounting seat, wherein the drag chain wheel comprises a drag chain shaft, a left half drag chain wheel body and a right half drag chain wheel body which are arranged on the drag chain shaft, and the excavator drag chain wheel and mounting seat structure assembly also comprises: the connecting seat is provided with a towing chain shaft mounting hole, a towing chain shaft of the towing chain wheel penetrates into the towing chain shaft mounting hole of the connecting seat, and the connecting seat is provided with a bolt mounting hole; the upper end face of the drag chain wheel mounting seat is provided with a threaded hole, and fastening bolts are sequentially arranged in the mounting hole of the connecting seat and the threaded hole of the drag chain wheel mounting seat, namely, the connecting seat and the drag chain wheel mounting seat are fastened and connected by the fastening bolts. The invention has the advantages of simplified structure, obviously reduced cost, convenient processing, easy assembly and integrally improved comprehensive mechanical property. The excavator drag chain wheel and mounting seat structure assembly is mainly used for supporting the upper crawler belt to prevent the upper crawler belt from sagging, and meanwhile, the auxiliary crawler belt assembly runs along a set motion track.)

1. Excavator drag sprocket and mount pad structure assembly, including drag sprocket, drag sprocket mount pad, drag sprocket includes the drag chain axle and installs at the epaxial half left drag sprocket wheel body of drag chain, half right drag sprocket wheel body, its characterized in that includes:

the connecting seat is provided with a towing chain shaft mounting hole, a towing chain shaft of the towing chain wheel is assembled in the towing chain shaft mounting hole of the connecting seat, and the connecting seat is also provided with a bolt mounting hole; the upper end face of the drag chain wheel mounting seat is provided with a threaded hole, and fastening bolts are sequentially assembled in the bolt mounting hole of the connecting seat and the threaded hole of the drag chain wheel mounting seat, namely, the connecting seat and the drag chain wheel mounting seat are fastened and connected by the fastening bolts.

2. The excavator drag sprocket and mounting base structure assembly as claimed in claim 1, wherein said connecting base is provided with four bolt mounting holes, and said drag sprocket mounting base is also provided with four corresponding threaded holes.

3. The excavator trailing sprocket and mount structure assembly of claim 1 or 2 further comprising:

the left bearing bush is arranged on the drag chain shaft, and the left half drag chain wheel body is arranged outside the left bearing bush;

the right bearing bush is arranged on the drag chain shaft, and the right half drag chain wheel body is arranged outside the right bearing bush.

4. The excavator drag sprocket and mount structure assembly of claim 3, wherein the drag axle is in interference fit with the connecting seat, and the left and right bearing bushes are in clearance fit with the drag axle, and have relative movement therebetween; a left metal sealing ring and a right metal sealing ring are arranged between the connecting seat and the left half drag chain wheel body, wherein the left sealing ring is fixed on the connecting seat, the right sealing ring is fixed on the left half drag chain wheel body, and the contact surfaces of the two side sealing rings perform relative friction motion; the two metal sealing rings are externally provided with O-shaped sealing rings, and the outer end of the right bearing bush is provided with the O-shaped sealing ring.

5. The assembly as claimed in claim 1, 2 or 4, wherein the left and right half sprocket bodies are welded together by friction welding.

Technical Field

The invention relates to the technical field of excavator drag chain wheels, in particular to an excavator drag chain wheel and mounting seat structure assembly.

Background

Along with the quick development of excavator trade, more and more diversified with mount pad structure assembly drag sprocket and the mount pad structure assembly of excavator of prior art, the drag sprocket of prior art and mount pad structure assembly structure are complicated, inconvenient bolt-up, and raw and other materials low-usage, the difficult cycle of processing is long, the expense is high, and overall structure assembly adjustment volume is big, need carry out the innovative design to overall structure, mounting means, strives to reach the purpose of being convenient for machining, assembly, structure lightweight, durability promotion.

The prior art assembly of a drag chain wheel and a mounting seat structure of an excavator is shown in fig. 1 and comprises a track frame welding part 101, a drag chain wheel mounting seat 102, a gasket 103, a fastening bolt 104, a drag chain wheel 105 and a steel track assembly 106. The drag chain wheel 105 is mounted in the drag chain wheel mounting seat 102, adjusted in position according to the required size, and fastened by a fastening bolt 104 in cooperation with a washer 103.

The excavator drag chain wheel mounting seat and the structure of the prior art are shown in figures 2 and 3, the excavator drag chain wheel mounting seat is blanked by a Q345C steel plate, and then is subjected to machining treatment, 4 (2) holes are drilled, bottom holes are drilled in threaded holes 5, tapping is carried out, and a plane 1, a plane 2, a boring hole 3 and a milling groove 6 are planed and milled. The machining process is complex, the machining period is long, the manufacturing cost is high, about 35 pieces of D grooves are milled in each saw blade, the groove milling efficiency is low, and the consumption of the saw blades is high. The dimensional tolerance of the hole 3 is strict and needs to be carefully controlled, otherwise, the tightening torque of the fastening bolt 104 reaches a specified value, and the inner diameter of the hole 3 is not shrunk in place, so that the main shaft 201 of the drag chain wheel 105 cannot be completely fastened, the drag chain wheel 105 is caused to transversely move back and forth, the abrasion between the drag chain wheel 105 and the steel track assembly 106 is inevitably accelerated, and the service life of the drag chain wheel is greatly shortened.

The drag chain wheel structure of the excavator in the prior art is shown in fig. 4 and comprises a drag wheel shaft 201, a tapered rolling bearing 202, a drag wheel body 203 and an end cover 204. The tapered rolling bearing 202 is assembled on the tug shaft 201 and is mainly used for supporting the tug body 203 and keeping the tug body 203 to normally rotate. The diameter of the tread 7 of the towing wheel body 203 is large, the wheel body is heavy, the used raw materials are large, 2 split forged pieces are welded by manual CO2 gas shielded welding, the welding position 8 of the towing wheel body is referred, the production efficiency is low, the thermal deformation is large, the dimensional tolerance of the position where the cone rolling bearing 202 is installed needs to be strictly controlled, and the processing cost is high. In addition, the tapered rolling bearing 202 is a precision part, and is expensive to purchase.

Publication (bulletin) No.: CN206617533U, publication (public notice) day: 2017-11-07 discloses an excavator drag sprocket, which comprises a sprocket body and a shaft, wherein a floating seal seat is installed on one side of the sprocket body, a floating seal ring is arranged at the bottom of the floating seal seat, an elastic steel ring for the shaft is arranged on one side of an O-shaped ring, the sprocket body is fixedly connected with the floating seal seat through the floating seal ring and the floating seal ring, a baffle is installed at the other end of the shaft, a first spring washer is arranged on one side of the baffle, and a first hexagon head bolt is arranged on one side of the first spring washer. This excavator drag sprocket, the end cover passes through second hexagon head bolt and second spring washer and wheel body fixed connection, can dismantle the end cover through second hexagon head bolt and second spring washer, can see first spring washer and first hexagon head bolt after the end cover is opened, first spring washer and first hexagon head bolt are axle and wheel body fixed connection device, can dismantle axle and wheel body through first spring washer and first hexagon head bolt, realize the convenient change of axle and wheel body, thereby increase drag sprocket's life.

Publication (bulletin) No.: CN203005596U, publication (public notice) day: 2013-06-19 discloses an anti-loosening drag chain wheel support mechanism for an excavator track, which belongs to the technical field of engineering machinery and comprises a drag chain wheel, a fixed support, a gasket, an adjusting bolt, a spring, an adjusting block, a movable support and a drag chain wheel support shaft. The utility model discloses under the excavator because of the not enough condition of butter, come tight flexible fixing support through setting up adjusting bolt in the structure to through the adjusting block location, adjust fixing support's height under the exogenic action, drive the tow sprocket by fixing support, thereby change the height of whole tow sprocket support, realized the tensioning of track, ensure that the not hard up condition that drops of track can not appear in the excavator, and then guaranteed the normal work of excavator.

The technical scheme of the disclosed technology, the technical problems to be solved and the beneficial effects are all different from the technical scheme of the invention, or the technical field or the application occasion is different, and no technical inspiration exists in the technical scheme disclosed above.

Disclosure of Invention

The invention aims to provide an excavator drag chain wheel and mounting seat structure assembly aiming at the defects in the prior art, which has the advantages of simplified structure, obviously reduced cost, convenient processing, easy assembly and integrally improved comprehensive mechanical property. The excavator drag chain wheel and mounting seat structure assembly is mainly used for supporting the upper crawler belt to prevent the upper crawler belt from sagging, and meanwhile, the auxiliary crawler belt assembly moves along a set motion track.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an excavator tow sprocket and mount pad structure assembly, includes tow sprocket, tow sprocket mount pad, the tow sprocket includes the drag chain axle and installs at the epaxial half left tow sprocket wheel body of drag chain, half right tow sprocket wheel body, still includes:

the connecting seat is provided with a towing chain shaft mounting hole, a towing chain shaft of the towing chain wheel is assembled in the towing chain shaft mounting hole of the connecting seat, and the connecting seat is also provided with a bolt mounting hole; the upper end face of the drag chain wheel mounting seat is provided with a threaded hole, and fastening bolts are sequentially assembled in the bolt mounting hole of the connecting seat and the threaded hole of the drag chain wheel mounting seat, namely, the connecting seat and the drag chain wheel mounting seat are fastened and connected by the fastening bolts.

Furthermore, the bolt mounting holes are provided with four, and the threaded holes are also provided with four corresponding threaded holes.

Further, still include:

the left bearing bush is arranged on the drag chain shaft, and the left half drag chain wheel body is arranged outside the left bearing bush;

the right bearing bush is arranged on the drag chain shaft, and the right half drag chain wheel body is arranged outside the right bearing bush.

Furthermore, the tug shaft is in interference fit with the connecting seat, the left bearing bush and the right bearing bush are in clearance fit with the tug shaft, and relative motion exists between the left bearing bush and the right bearing bush. Two metal sealing rings are arranged between the connecting seat and the left half trailing wheel body, the left sealing ring is fixed on the connecting seat, the right sealing ring is fixed on the left half trailing wheel body, and relative friction motion is performed between the contact surfaces of the two side sealing rings. Two metal seal ring outsides are furnished with O type sealing washer, and right axle bush outer end is furnished with O type sealing washer simultaneously, ensure that inside lubricating oil of whole sprocket wheel body does not take place to leak outward to and debris such as the outside dust of sprocket wheel body get into inside the sprocket wheel body.

Furthermore, the left half trailing chain wheel body and the right half trailing chain wheel body are welded into a whole in a friction welding mode.

Compared with the prior art, the invention has the following beneficial effects:

the excavator drag chain wheel and mounting seat structure assembly is mainly used for supporting the track assembly, prevents drooping, assists the track assembly to move according to setting for the movement track simultaneously, and is higher to aspects such as overall structure, lightweight, mounting means, and the structure should be more rationalized, the machining of being convenient for, reduce cost promotes the incorruptibility, easily assembly.

The mounting seat and the drag chain wheel are lighter in structure, machining is facilitated greatly, the cost of raw materials and machining auxiliary materials is reduced greatly, the overall structure is easy to assemble, and the overall structure is reasonable and compact and can be improved.

The novel drag chain wheel and mounting seat structure of the invention is designed to be bold in innovation and light on the basis of the drag chain wheel mounting seat structure in the prior art. The mounting seat is easy to machine, saves the manufacturing cost, shortens the processing period and is easy to mount the drag chain wheel. The rolling bearing in the drag chain wheel is improved into a bearing bush (sliding bearing), the sizes of the bearing bush body and the tread are relatively reduced at the same time, the raw material of steel is saved, and the mechanical processing is convenient; the towing wheel body structure group adopts friction welding to replace manual CO2 gas shielded welding, reduces welding thermal deformation, and the incorruptibility obtains promoting, and life cycle extension, production efficiency obtains very big promotion.

Drawings

FIG. 1 is a schematic view of a prior art excavator drag sprocket and mount structure assembly;

FIG. 2 is a schematic view of a prior art excavator drag sprocket mounting base;

FIG. 3 is a view in the direction E of FIG. 2;

FIG. 4 is a schematic view of a prior art excavator drag sprocket configuration;

FIG. 5 is a schematic view of an excavator drag sprocket and mounting base structure assembly in accordance with the present invention;

FIG. 6 is a schematic view of the construction of the mounting base of the drag chain wheel for the excavator according to the present invention;

FIG. 7 is a view taken along line A of FIG. 6;

FIG. 8 is a schematic view of a drag chain wheel for an excavator according to the present invention;

fig. 9 is a left side view of fig. 8.

In the figure: 101. a track frame weldment; 102. a drag chain wheel mounting seat; 103. a gasket; 104. fastening a bolt; 105. a drag chain wheel; 106. a steel track assembly;

1. a plane; 2. a plane; 3. an aperture; 4. an aperture; 5. a threaded hole; 6. a groove; 7. a tug body tread; 8. welding the tug body; 9. a plane; 10. the threaded hole 12 and the wheel body welding part of the drag chain wheel;

201. a trailing axle; 202 conical rolling bearing; 203. a drag wheel body; 204 end caps;

301. a track frame weldment; 302. a drag chain wheel mounting seat; 303. a gasket; 304. fastening a bolt; 305. a drag chain wheel; 306. a steel track assembly;

401. a trailing axle; 402. a left bearing shell; 403. a sprocket body of the trailing sprocket; 404. a right bearing shell; 405. a connecting seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.