CN216758668U - Welding device for automatic cable drum mounting bracket of electric excavator - Google Patents

Abstract

The utility model provides a welding set of automatic cable drum installing support of electric excavator, includes upper fixed plate, bottom plate and screw thread locating pin axle, is provided with the locating piece on the upper fixed plate, is provided with down the locating piece on the bottom plate, all is provided with position sleeve and bolt mounting hole on upper fixed plate and the bottom plate, and screw thread locating pin axle inserts in the position sleeve. The two thread hole groups of the upper plate of the crawler frame are respectively used as positioning references, the thread positioning pin shaft is screwed in the thread hole on the upper plate of the crawler frame and the thread hole on the fixed seat, the whole device is connected to the left fixed seat and the right fixed seat of the automatic cable drum through bolts, and the left fixed seat and the right fixed seat are positioned and welded on the crawler frame. The device has simple structure, light overall weight and high positioning precision, is convenient for independent operation by one person and is convenient for installation and disassembly; the welding efficiency of the mounting bracket can be greatly improved, the assembly efficiency of the automatic cable drum is improved, and the labor intensity of operators is greatly reduced.

Description

Welding device for automatic cable drum mounting bracket of electric excavator

Technical Field

The utility model relates to a device for welding an automatic cable drum mounting bracket of an electric excavator, and belongs to the field of engineering machinery.

Background

The automatic cable reel of the electric excavator is used for automatically winding and unwinding a cable according to the moving distance of the whole electric excavator, so that the cable is prevented from being rolled when the electric excavator moves, and personal casualty accidents are prevented. One end of the automatic cable drum is connected with an external power grid, and the other end of the automatic cable drum is connected with a motor through a cable, so that the automatic cable drum can automatically pay off and take up and is synchronous with the advancing speed of the whole machine. The structure is shown in figure 1, and a right upper mounting hole 1, a left upper mounting hole 3, a right lower mounting hole 2 and a left lower mounting hole 4 are arranged on the structure.

As shown in fig. 2, the automatic cable reel 9 is arranged behind the track frame 5 of the electric excavator and assembled on the track frame mounting bracket, and the upper plate 11 of the track frame 5 and the threaded holes on the left fixing seat 12 and the right fixing seat 13 form a mounting hole group, as shown in fig. 3. The structure of the left fixed seat 12 and the right fixed seat 13 is shown in fig. 4. The right upper mounting hole 1 and the left upper mounting hole 3 on two sides of the upper part of the automatic cable drum 9 correspond to the right upper plate thread fixing hole 14 and the left upper plate thread fixing hole 16 of the track frame upper plate 11 and are fastened through a flat washer 6 and a fixing bolt 7. The left lower side mounting hole 4 and the right lower side mounting hole 2 on the two sides of the lower part of the automatic cable drum 9 correspond to the left fixing seat thread fixing hole 15 and the right fixing seat thread fixing hole 17 on the lower part of the upper plate 11 of the crawler frame and are fastened through the flat washer 8 and the fixing bolt 10.

The self weight of the automatic cable drum 9 reaches about 3 tons, and because the left fixing seat 12 and the right fixing seat 13 installed on the automatic cable drum 9 are not on the same plane with the mounting hole of the upper plate 11 of the track frame and form a 90-degree included angle (see fig. 3), when the manufacturing accuracy (size accuracy and form and position tolerance) of the left fixing seat and the right fixing seat are not in the same plane, the design requirements cannot be met, the assembly is difficult, and the automatic cable drum mounting hole needs to be machined again sometimes. Because the automatic cable drum 9 is heavy in whole weight and complex in shape, hoisting and reference positioning processing are troublesome, the installation hole groups are distributed at an included angle of 90 degrees, secondary clamping is needed, the center distance of the hole groups is large, processing equipment needs to be processed by large-scale machine tool equipment, not only is processing resources wasted and time wasted, but also the automatic cable drum fixing bolt is easy to loosen, so that the bolt shearing phenomenon is caused, and accidents are caused.

Two methods are successively adopted in actual production to solve the problems:

the first method comprises the following steps: referring to fig. 3, firstly, 12 screw holes in 6 screw holes on the left fixing seat 12 and the right fixing seat 13 and 12 screw holes in two groups on the track frame upper plate 11 are processed, then the positioning is carried out by taking the two groups of screw holes on the track frame upper plate 11 as reference, and the 6 screw holes on the left fixing seat 12 and the right fixing seat 13 are welded in a measuring and positioning manner, so that the dimensional accuracy and the form and position tolerance of the two groups of screw holes on the left fixing seat 12 and the right fixing seat 13 and the two groups of screw holes on the track frame upper plate 11 are ensured.

The second method comprises the following steps: an integral welding device is designed and manufactured according to two groups of threaded holes in the upper plate 11 of the track frame and two groups of threaded holes in the left fixing seat 12 and the right fixing seat 13, and the left fixing seat 12 and the right fixing seat 13 are welded in a positioning mode by taking the two groups of threaded holes in the upper plate 11 of the track frame as reference. The integral welding device is composed of a first plate 19 and a second plate 24, wherein a first hole group 18 and a second hole group 21 are arranged on two sides of the first plate 19, a U-shaped groove 20 is arranged between the first hole group 18 and the second hole group 21, a third hole group 22 and a fourth hole group 25 are arranged on the second plate 24, and a hoisting hole 23 is arranged between the third hole group 22 and the fourth hole group 25, as shown in fig. 5. The first set of holes 18 and the second set of holes 21 in the first plate 19 are adapted to be secured to two sets of threaded holes in the upper plate 11 of the track frame. The U-shaped groove 20 is a process groove, which is convenient for welding the left fixing seat 12 and the right fixing seat 13, but is limited by the structural space of the crawler frame, the welding space is still limited, and the welding effect is not ideal. And the third hole group 22 and the fourth hole group 25 on the second plate 24 are used for being fixed with two groups of threaded holes on the left fixing seat 12 and the right fixing seat 13, and the hoisting holes 23 are used for hoisting the integral welding device. The third hole group 22 and the fourth hole group 25 are respectively fixed with two groups of threaded holes on the left fixing seat 12 and the right fixing seat 13 through bolts and gaskets, then the first hole group 18 and the second hole group 21 are fixed with two groups of threaded holes on the track frame upper plate 11 through bolts and gaskets, after adjustment, the left fixing seat 12 and the right fixing seat 13 are fixedly welded on the track frame 5, finally relevant parts are reinforced and welded, and the integral welding device is disassembled after completion. Fig. 6 shows a schematic view of the installation of the integral welding device 26, where a and C are respectively the hole sets of the upper plate 11 of the track frame, and are connected by a flat washer 29 and a fixing bolt 30; the positions B and D are respectively a left fixing seat hole group and a right fixing seat hole group which are connected by a flat washer 27 and a fixing bolt 28.

The integral welding device has the following defects:

1. the welding device has large volume and weight of 105kg, which is not beneficial to independent operation of one person.

2. The four groups of hole groups need to be processed by a large-scale numerical control processing center, and the manufacturing cost of the integral welding device is high.

3. The welding device positions the threaded hole group by the bolt, and because a certain gap exists between the excircle of the bolt and the fixing hole of the welding device, corresponding positioning deviation is generated, and the positioning precision effect is poor.

4. The welding device is troublesome to disassemble and assemble, low in working efficiency and high in working strength.

5. Limited by the overall structure space of the crawler frame, and poor welding effect.

Generally, this integral welding is equipped unsatisfactorily, and how to promote automatic cable drum installing support preparation precision is the key problem that awaits solution at present.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the welding technology of the automatic cable drum mounting bracket of the existing electric excavator, the utility model provides the welding device of the automatic cable drum mounting bracket of the electric excavator, which has the advantages of accurate positioning, convenient disassembly and assembly and good welding effect.

The welding device for the automatic cable drum mounting bracket of the electric excavator adopts the following technical scheme:

the device comprises an upper fixing plate, a lower fixing plate and a thread positioning pin shaft, wherein an upper positioning block is arranged on the upper fixing plate, a lower positioning block is arranged on the lower fixing plate, a positioning sleeve and a bolt mounting hole are arranged on the upper fixing plate and the lower fixing plate, and the thread positioning pin shaft is inserted into the positioning sleeve.

And reinforcing ribs are arranged between the upper fixing plate and the lower fixing plate, and handles are arranged on two sides of each reinforcing rib.

Be provided with the transport hole on the handle, the corner is provided with stress release hole, and the transport hole both ends set up the chamfer.

Stress release holes are formed in the upper corners of the reinforcing ribs.

The upper fixing plate is provided with a machining area used for connecting an upper positioning block, and the lower fixing plate is provided with a machining area used for connecting a lower positioning block.

The sections of the upper positioning block and the lower positioning block are semicircular, and fixing holes are formed in the upper positioning block and the lower positioning block.

The locating sleeve is provided with an inner hole and a boss.

The thread positioning pin shaft comprises a fastening thread section, a positioning reference surface and a screwing surface.

When the device is applied, the two threaded hole groups of the upper plate of the crawler frame are respectively used as positioning references, and the threaded positioning pin shafts are respectively fixed to the threaded hole groups of the upper plate of the crawler frame through the positioning sleeves in a guiding manner and are respectively positioned on the left fixing seat and the right fixing seat. The thread positioning pin shaft is screwed up in a thread hole on the upper plate of the crawler frame and a thread hole on the fixing seat (the left fixing seat and the right fixing seat), and a bolt is inserted into the bolt mounting hole and screwed up in the thread hole on the fixing seat, so that the whole device is connected on the left fixing seat and the right fixing seat of the automatic cable drum. And independently welding the other fixing seat after one fixing seat is independently welded. And after the adjustment is correct, the left fixing seat and the right fixing seat are positioned and welded on the crawler frame, and finally, after the relevant welding parts are reinforced, the welding device is disassembled.

The utility model has simple structure, light overall weight and high positioning precision, and is respectively and independently welded with the left fixing seat and the right fixing seat, so that the requirements of the size precision and the form and position tolerance design of the mounting bracket are completely met; meanwhile, the manufacturing cost of welding equipment can be reduced, the welding equipment is compact and light in structure, is convenient to operate independently by one person and is convenient to mount and dismount; the welding efficiency of the mounting bracket can be greatly improved, the assembly efficiency of the automatic cable drum is improved, and the labor intensity of operators is greatly reduced. The practical use verifies that the dimensional accuracy and form and position tolerance requirements of the automatic cable drum mounting bracket can be completely guaranteed.

Drawings

Fig. 1 is a schematic structural view of an automatic cable reel of an electric excavator configuration.

Fig. 2 is a schematic view of the installation of the automatic cable reel on the complete machine of the electric excavator.

Fig. 3 is a schematic view of a thread mounting hole group formed by the upper plate of the track frame and the left and right fixing seats.

Fig. 4 is a schematic structural diagram of the left fixing seat and the right fixing seat of the track frame of the electric excavator. (a) Is a left fixed seat and (b) is a right fixed seat.

Fig. 5 is a schematic structural view of a conventional integrated welding apparatus.

Fig. 6 is a schematic view of the installation and use of the existing integrated welding device.

Fig. 7 is a schematic view of an outer three-dimensional structure of the welding apparatus of the present invention.

FIG. 8 is a schematic view of the inside perspective of the welding apparatus of the present invention.

FIG. 9 is a schematic view of the welding apparatus of the present invention in use and installed.

Fig. 10 is a schematic view of the structure of the handle in the welding apparatus of the present invention.

Fig. 11 is a schematic structural view of a reinforcement rib in the welding apparatus of the present invention.

Fig. 12 is a schematic view of a machining area in the welding apparatus of the present invention.

Fig. 13 is a schematic structural diagram of a positioning block in the welding device of the present invention.

Fig. 14 is a schematic structural view of a positioning sleeve in the welding device of the present invention.

Fig. 15 is a schematic structural view of a threaded locating pin in the welding apparatus of the present invention.

In the figure: 1. a right upper mounting hole, 2. a right lower mounting hole, 3. a left upper mounting hole, and 4. a left lower mounting hole; 5. the cable comprises a crawler frame, 6 parts of a flat washer, 7 parts of a fixing bolt, 8 parts of a flat washer, 9 parts of an automatic cable drum and 10 parts of a fixing bolt; 11. the crawler frame comprises a crawler frame welding part upper plate, 12 parts of a left fixed seat, 13 parts of a right fixed seat, 14 parts of a left upper plate thread fixing hole, 15 parts of a left fixed seat thread fixing hole, 16 parts of a right upper plate thread fixing hole and 17 parts of a right fixed seat thread fixing hole; 18. the novel steel plate structure comprises a first hole group, a first plate, a U-shaped groove, a second hole group, a third hole group, a lifting hole, a lifting block, a lifting block, a lifting block, a lifting block, a lifting block, a lifting block, a lifting block, a lifting block lifting.

Detailed Description

The welding device is used for the automatic cable drum mounting bracket of the electric excavator, humanized technical innovation and optimization design is carried out on the basis of an integral welding device, the overall dimension of welding equipment is reduced in an optimized mode, the mounting bracket is convenient to weld, the structure is refined, and accurate positioning is convenient.

The welding device of the present invention, as shown in fig. 7 and 8, comprises an upper fixing plate 31 and a lower fixing plate 34 which are welded together and are in a vertical state, wherein a groove is welded at the welding position of the upper fixing plate 31 and the lower fixing plate 34 to improve the welding strength, and the two fixing plates keep an included angle of 90 °. In order to enhance the structural strength of the welding device and prevent the welding device from being deformed, a reinforcing rib 33 is disposed between the upper fixing plate 31 and the lower fixing plate 34, and two handles 32 are disposed on two of the reinforcing ribs 33. The upper fixing plate 31 is provided with an upper positioning block 38, and the lower fixing plate 34 is provided with a lower positioning block 39. The upper fixing plate 31 and the lower fixing plate 34 are both provided with a positioning sleeve 35 and bolt mounting holes, the threaded positioning pin shaft 37 is inserted into the positioning sleeve 35 (the positioning sleeve 35 is matched with the positioning reference surface 55) and screwed into a threaded hole in the track frame upper plate 11 and a threaded hole in the fixing seat (the left fixing seat 12 and the right fixing seat 13), and the hexagon socket head cap bolt 36 is inserted into the bolt mounting hole and screwed to fasten the upper positioning block 38 and the lower positioning block 39.

Referring to fig. 9, the welding device 40 of the present invention uses the left upper plate threaded fastening hole 14 and the right upper plate threaded fastening hole 16 of the two threaded hole groups of the track frame upper plate 11 as positioning references, and the threaded positioning pin 37 is guided and fixed to the threaded hole groups of the track frame upper plate 11 through the positioning sleeve 35 and is positioned on the left fixing seat 12 and the right fixing seat 13, respectively. The welding device 40 is convenient to detach and install, can independently complete operation by one person, and independently welds another fixing seat after one fixing seat is independently welded. The G hole groups are respectively connected with two groups of threaded hole groups on the upper plate 11 of the crawler frame by using threaded positioning pin shafts 37. The H hole group is respectively connected with two groups of threaded holes on the left fixing seat 12 and the right fixing seat 13 by a threaded positioning pin shaft 37. And after the adjustment is correct, the left fixing seat 12 and the right fixing seat 13 are positioned and welded on the crawler frame 5, and finally, after the relevant parts to be welded are reinforced, the lower welding device 40 is detached.

The handle 32 is constructed as shown in fig. 10, and has a carrying hole 42, a stress releasing hole 41 at a corner thereof, and chamfers 43 at both ends of the carrying hole 42. The reinforcing ribs 33 are structured as shown in fig. 11, and stress releasing holes 41 are provided at the corners. The handle 32 is provided with the carrying hole 42 through humanized design, and the two sides of the carrying hole 42 are chamfered, thereby facilitating carrying and preventing the hand surface from being scratched. The stress release hole is arranged for releasing welding stress when the welding device is manufactured, so that welding deformation is reduced, and manufacturing precision of the welding device is improved.

In order to ensure the perpendicularity of the included angle between the upper fixing plate 31 and the lower fixing plate 34, after the upper fixing plate 31, the lower fixing plate 34, the reinforcing ribs 33 and the handle 32 are welded together, machining needs to be performed on the inner sides of the upper fixing plate 31 and the lower fixing plate 34, as shown in fig. 12, and the machining area 45, the machining area 46, the machining area 47 and the machining area 48 are included. Machining areas 45 and 47 are used to mount upper locating block 38 and machining areas 46 and 48 are used to mount lower locating block 39. 2Q holes are machined in both machining area 45 and machining area 47, and 6N holes are machined in upper locating block 38 between the two areas. Machining area 46 and machining area 48 each machine 3P holes and lower locating block 39 machines 6M holes between the two areas. The holes are machined to ensure that machining standards are uniform and dimensional and form and position tolerance accuracy is ensured.

As shown in fig. 13, the upper positioning block 38 and the lower positioning block 39 are each formed to have a semicircular shape 49 in cross section. Two fixing holes, namely a fixing hole 50 and a fixing hole 51, are machined in the upper positioning block 38 and correspond to the 2Q holes in the machining area. Three fixing holes are processed on the lower positioning block 39, and correspond to the 3P holes of the machining area.

In order to ensure that the welding device is in line contact with a workpiece instead of surface contact, the upper positioning block 38 and the lower positioning block 39 are made of 45# round steel, the comprehensive mechanical property is improved through quenching and tempering, and then machining is carried out. The upper positioning block 38 and the lower positioning block 39 are fixed by hexagon socket head cap screws 36 (see fig. 7), so that the upper positioning block 38 and the lower positioning block 39 can be replaced or maintained after being worn.

The positioning sleeve 35 is structurally shown in fig. 14 and comprises an inner hole 52 and a boss 53, the end face of the inner hole 52 is provided with a chamfer, the material is 45#, the heat treatment hardness is HRC 40-45, the surface is subjected to bluing treatment or other rust-proof treatment, the excircle H7/r6 is matched to improve the positioning accuracy, and the chamfer is convenient for inserting the thread positioning pin shaft 37. And the positioning sleeve 35 is adopted to facilitate the maintenance and replacement of the welding device.

The structure of the thread positioning pin shaft 37 is shown in fig. 15, and comprises a fastening thread section 54 at the lower end, a middle positioning reference surface 55 and an upper square screwing surface 56, wherein the used material is T8, the heat treatment hardness is HRC 50-55, the fastening thread section 54 is used for fastening a welding device on the track frame upper plate 11 and the left mounting seat 12 and the right mounting seat 13 of the automatic cable drum, the positioning reference surface 55 is matched with an inner hole 52 of the positioning sleeve 35 to ensure accurate positioning of a threaded hole, and the square screwing surface 56 is convenient for fastening, dismounting and mounting of the welding device.

The welding device is adopted to weld the left fixing seat 12 and the right fixing seat 13, the design requirements of the position and the dimensional precision of the automatic cable drum mounting bracket are completely met, and the welding efficiency is greatly improved; the automatic cable drum assembling efficiency is greatly improved, the labor intensity of operators is greatly improved, and the automatic cable drum assembling device has extremely good practical and reference values.

This automatic cable drum installing support welding set has following characteristics:

1. the integral type is optimized into a single body type, so that enough space is saved between the two mounting brackets, and the welding is convenient for operators.

2. Small volume, compact structure, weight of only 15kg, and suitability for independent operation by a single person.

3. The processing and the manufacturing are convenient, and the manufacturing cost is low.

4. Humanized design, increase the handle, easily installation and dismantlement.

5. Overall structure is novel simple, and strengthening rib and handle add stress release hole to release welding stress when doing benefit to equipment and making reduces welding deformation, promotes welding set manufacturing accuracy.

6. When the welding equipment positioning reference surface machine is processed, a unified reference is adopted, the machine is processed by a clamping machine, and the precision of the size and the form and position tolerance is high.

7. The positioning block is fixed by an inner hexagon bolt 36, so that the disassembly and maintenance are convenient; the positioning surface of the positioning block is semicircular to realize linear contact so as to improve the positioning precision of the welding equipment.

8. The locating sleeve 35 can be detached, so that the locating sleeve can be replaced conveniently after being worn.

9. And the threaded positioning pin shaft 37 is adopted, so that the welding equipment is convenient to accurately position and quickly disassemble.

10. The positioning reference surface 55 of the threaded positioning pin shaft 37 and the inner hole 52 of the positioning sleeve 35 are accurately positioned, the positioning effect is excellent, and the design precision requirement can be completely ensured.

Claims (8)

1. The utility model provides a welding set of automatic cable drum installing support of electric excavator, characterized by: the positioning device comprises an upper fixing plate, a lower fixing plate and a thread positioning pin shaft, wherein an upper positioning block is arranged on the upper fixing plate, a lower positioning block is arranged on the lower fixing plate, positioning sleeves and bolt mounting holes are arranged on the upper fixing plate and the lower fixing plate, and the thread positioning pin shaft is inserted into the positioning sleeves.

2. The welding device for the automatic cable reel mounting bracket of the electric excavator according to claim 1, wherein: and reinforcing ribs are arranged between the upper fixing plate and the lower fixing plate, and handles are arranged on two sides of each reinforcing rib.

3. The welding device for the automatic cable reel mounting bracket of the electric excavator as claimed in claim 2, wherein: be provided with the transport hole on the handle, the corner is provided with stress release hole, and the transport hole both ends set up the chamfer.

4. The welding device for the automatic cable reel mounting bracket of the electric excavator according to claim 2, wherein: and stress release holes are formed in the upper corners of the reinforcing ribs.

5. The welding device for the automatic cable reel mounting bracket of the electric excavator according to claim 1, wherein: the upper fixing plate is provided with a machining area used for connecting an upper positioning block, and the lower fixing plate is provided with a machining area used for connecting a lower positioning block.

6. The welding device for the automatic cable reel mounting bracket of the electric excavator according to claim 1, wherein: the sections of the upper positioning block and the lower positioning block are semicircular, and fixing holes are formed in the upper positioning block and the lower positioning block.

7. The welding device for the automatic cable reel mounting bracket of the electric excavator according to claim 1, wherein: the locating sleeve is provided with an inner hole and a boss.

8. The welding device for the automatic cable reel mounting bracket of the electric excavator according to claim 1, wherein: the thread positioning pin shaft comprises a fastening thread section, a positioning reference surface and a screwing surface.

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