CN214329029U - Variable cross-section movable arm crossbeam and crossbeam assembly - Google Patents

Abstract

The utility model relates to a variable cross section swing arm crossbeam and crossbeam assembly. The technical scheme includes that the variable-section movable arm cross beam comprises a connecting portion and fixing portions arranged at two ends of the connecting portion, the cross section of the connecting portion comprises an upper straight edge, a lower straight edge, an upper inclined edge and a lower inclined edge, one end of the upper straight edge is connected with one end of the upper inclined edge, one end of the lower straight edge is connected with one end of the lower inclined edge, the other end of the upper inclined edge is in transition connection with the other end of the lower straight edge through a rear arc, and the other end of the lower inclined edge is in transition connection with the other end of the upper straight edge through a front arc. The beneficial effects of the utility model are that, the cross sectional shape that crossbeam connecting portion adopted a plurality of straight flanges and circular arc limit to combine together replaces traditional circular or square cross section crossbeam, forms the rigid support effect when the work atress, can be used for supporting two movable arm roof beams alone, adopts this kind of crossbeam can effectively reduce the fault rate of welding seam fracture in the crossbeam assembly, has avoided the torsion force that the crossbeam assembly receives to act on the welding seam between crossbeam and the mounting panel completely.

Description

Variable cross-section movable arm crossbeam and crossbeam assembly

Technical Field

The utility model relates to a loader field especially relates to a variable cross section swing arm crossbeam to and a crossbeam assembly.

Background

The loader is used as an open-air site such as a coal plant, a port, a mine site and the like or a closed site such as a factory building, a cabin and the like, is mainly used for the operations of collecting, transporting and loading lime, coal, gravel and other materials, and has high loading efficiency and flexible collection and transportation, so the loader is very widely applied. For the working condition exceeding the height of the common carrier vehicle, a working device with higher lifting height is needed, and the length of a movable arm of the excavating mechanical arm is usually lengthened to increase the lifting height. The movable arm is a working device, particularly a movable arm beam for connecting two movable arm plates, besides the stability of the whole shape of the movable arm is kept, a mounting plate is additionally arranged to serve as a front rocker arm mounting seat (namely a beam assembly), a bucket oil cylinder is mounted, the load is large and frequent, the failure rate is high, the weight is increased after the bucket oil cylinder is lengthened, the length of the stressed arm is increased, the load problem is increased, the strength cannot be met, the early damage and the like are caused, the existing beam is a metal plate welding structure with an arc-shaped or square cross section, the strength of a welding seam is low, the beam and the rocker arm mounting plate are fixed only by friction and welding, the supporting effect is poor, the stress distribution of the beam with the square cross section is uneven, and the stress is concentrated at a turning part. And the beam assembly is large in size, multiple in welding seams and heavy in weight, the working efficiency of the whole machine is affected, the welding seams are easy to crack, and the condition that the load of the long movable arm is increased cannot be adapted.

Disclosure of Invention

The utility model discloses not enough to current movable arm crossbeam intensity, the not good problem of supporting effect provides a better variable cross section movable arm crossbeam of supporting effect.

For solving the problem, the utility model discloses a technical scheme do, a variable cross section swing arm crossbeam, including connecting portion and the fixed part of setting at the connecting portion both ends, the cross section of connecting portion includes straight flange, lower straight flange, goes up hypotenuse and hypotenuse down, and the one end of going up the straight flange is connected with the one end of last hypotenuse, and the one end of lower straight flange is connected with the one end of lower hypotenuse, and the other end of going up the hypotenuse passes through circular arc transitional coupling with the other end of lower straight flange, and the other end of lower hypotenuse passes through preceding circular arc transitional coupling with the other end of last straight flange. The cross section shape that crossbeam connecting portion adopted a plurality of straight flanges and arc edge to combine together replaces traditional circular or square cross section crossbeam, forms rigid support effect when the work atress, has avoided the torsion force that the crossbeam assembly receives to act on the welding seam between crossbeam and the mounting panel completely, adopts this kind of crossbeam can effectively reduce the fault rate of welding seam fracture.

Preferably, the fixed end face of the fixed portion is circular, the diameter of the circle is larger than the maximum distance between the front arc and the rear arc, and the fixed end face is used for being fixedly connected with the movable arm beam. The fixed end face increases the welding area, and the overall strength of the movable arm can be improved.

Preferably, the rounded end surface of the fixing portion and the connecting portion are in smooth transition. The large round end faces are arranged at the two ends, the connecting parts between the end faces and the middle section of the cross beam are in smooth transition, the size of the cross beam is reduced while the welding strength is ensured, the weight of the cross beam is reduced, the total weight of a movable arm formed by the cross beam is further reduced, the power loss of a loader is reduced, and the working efficiency is improved.

Preferably, the upper and lower straight sides are symmetrical about the geometric center of the cross-section, the upper and lower oblique sides are symmetrical about the geometric center of the cross-section, and the anterior and posterior arcs are symmetrical about the geometric center of the cross-section. The mounting surface does not need to be distinguished specially during assembly, so that the mounting and the use are convenient; meanwhile, the central symmetrical structure is beneficial to uniform stress distribution and is more stable.

Preferably, the connecting portion and the fixing portion are integrally cast. Replace the panel beating welding with the casting, avoided the problem that crossbeam welding seam department probably ftractures, improved the intensity of crossbeam, the curve appearance of this crossbeam of casting easier shaping simultaneously, the appearance uniformity of output crossbeam is good.

Based on above-mentioned crossbeam structure, the utility model also provides a crossbeam assembly adopts foretell variable cross section swing arm crossbeam, and parallel mounting has the mounting panel of certain quantity on the connecting portion of crossbeam, and the mounting panel is used for installing the scraper bowl hydro-cylinder.

Preferably, the lower end of the mounting plate is provided with a claw hook part, and the inner profile of the claw hook part is grabbed and attached to the front arc, the upper straight edge, the upper bevel edge and the rear arc. This beam assembly adopts above-mentioned crossbeam, and mounting panel claw hook portion snatchs the connecting portion of block crossbeam, forms the rigid support through the combination of straight flange and pitch arc limit, effectively improves the atress form, reduces the atress of welding seam between mounting panel and the crossbeam, reduces the fault rate of beam assembly welding seam fracture.

Preferably, a reinforcing rib is arranged between the mounting plate and the connecting part, and a connecting rib is arranged between adjacent mounting plates. The positioning connection strength of the mounting plate and the cross beam is enhanced, so that the mounting plate is not easy to bend and break a welding line relative to the cross beam.

Preferably, the connecting part is welded and fixed with the mounting plate.

Preferably, all weld between strengthening rib and the mounting panel, between strengthening rib and connecting portion, between splice bar and the mounting panel and fix.

Can find out through above technical scheme, the utility model has the advantages of:

1. the cross beam adopts a variable cross section design, and the middle connecting part adopts a straight-edge arc-edge combined cross section to form a supporting function; the welding area of the fixing parts at the two ends is enlarged, so that the connection between the cross beam and the movable arm beam is more stable;

2. the beam is integrally cast and formed, so that the beam has better integrity and higher integral strength, and is convenient for forming a complex curved surface;

3. the beam structure can be independently used as a reinforcing support between two movable arm beams in the movable arm, and also can be applied to a beam assembly, so that the problem that a welding line in the beam assembly is stressed and cracked is effectively avoided;

4. the movable arm overall structure is firmer and lighter, and is more suitable for the use of the lengthened movable arm.

Meanwhile, the beam assembly manufactured by the beam structure can bear larger load, and the welding line is less stressed and not easy to damage.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is the structure schematic diagram of the variable cross section movable arm beam of the utility model.

Fig. 2 is a schematic structural diagram of a cross section of a connecting portion of a variable cross-section boom beam of the present invention.

Fig. 3 is a schematic structural diagram of the middle cross beam assembly of the present invention.

Fig. 4 is an exploded view of fig. 3.

Fig. 5 is a cross-sectional view of the middle cross member assembly of the present invention.

Fig. 6 is a schematic view of the variable cross section boom and beam assembly of the present invention.

In the figure: 1. a variable cross-section movable arm beam, 11, a connecting part, 111-1, an upper straight edge, 111-2, a lower straight edge, 112-1, an upper bevel edge, 112-2, a lower bevel edge, 113-1, a front arc, 113-2, a rear arc, 12, a fixing part,

2. the beam assembly comprises a beam assembly, 21 mounting plates, 211 claw hook parts, 22 reinforcing ribs and 23 connecting ribs;

3. and a movable arm beam.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments, and obviously, the embodiments described below are only some embodiments of the present invention, not all 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 scope of protection of this patent.

As shown in fig. 1 and 2, the variable-section movable arm beam comprises a connecting portion 11 and fixing portions 12 arranged at two ends of the connecting portion 11, wherein the connecting portion 11 is a hollow cylinder, the cross section of the connecting portion comprises an upper straight edge 111-1, a lower straight edge 111-2, an upper inclined edge 112-1 and a lower inclined edge 112-2, one end of the upper straight edge 111-1 is connected with one end of the upper inclined edge 112-1, one end of the lower straight edge 111-2 is connected with one end of the lower inclined edge 112-2, the other end of the upper inclined edge 112-1 is in transition connection with the other end of the lower straight edge 111-2 through a rear arc 113-2, and the other end of the lower inclined edge 112-2 is in transition connection with the other end of the upper straight edge 111-1 through a front arc 113-1.

The upper straight side 111-1 and the lower straight side 111-2 are symmetrical with respect to the geometric center of the cross-section, the upper oblique side 112-1 and the lower oblique side 112-2 are symmetrical with respect to the geometric center of the cross-section, and the anterior circular arc 113-1 and the posterior circular arc 113-2 are symmetrical with respect to the geometric center of the cross-section.

The connecting part 11 is the special-shaped section column, the fixed end face of the fixing part 12 is circular, the circular diameter is larger than the maximum distance between the front arc 113-1 and the rear arc 113-2, the circular end face of the fixing part 12 and the connecting part 11 are in smooth curve transition, the whole body is of a curved surface structure, stress distribution is more uniform, the problem of stress mutation is avoided, the fixed end faces are only increased at two ends, namely, the welding area is increased, the connection between the variable-section movable arm beam and the movable arm beam is firmer, the supporting effect is better, meanwhile, the whole weight is reduced, the strength requirement of the movable arm during working is met, and efficiency loss caused by overlarge weight can be avoided.

For the shaping of the curved surface of convenience, connecting portion 11 and fixed part 12 (become cross-section movable arm crossbeam whole promptly) adopt integrative casting shaping, have avoided the welding seam of traditional panel beating welding crossbeam simultaneously, make this crossbeam structural integrity better, and bulk strength is higher.

Based on above-mentioned crossbeam structure, the utility model also provides a crossbeam assembly, its structure is shown in 3-5, and the crossbeam assembly includes foretell variable cross section swing arm crossbeam 1 (the crossbeam is abbreviated for short down), and parallel mount has two mounting panels 21 on the connecting portion 11 of crossbeam, and the upper end of mounting panel 21 is equipped with scraper bowl hydro-cylinder mounting hole, and scraper bowl hydro-cylinder mounting hole is used for installing the scraper bowl hydro-cylinder.

The lower end of the mounting plate 21 is provided with a claw hook part 211, as shown in fig. 5, the inner contour of the claw hook part 211 grabs the length of about 2/3 of the cross section periphery of the joint part 11, namely a front arc 113-1, an upper straight edge 111-1, an upper bevel edge 112-1 and a rear arc 113-2, namely the mounting plate 21 is clamped on the joint part 11 of the cross beam through the combination of the straight edge, the bevel edge and the arc edge, rigid support is formed between the mounting plate 21 and the cross beam through the clamping in the shape, then welding and fixing are carried out, and the torsion force between the mounting plate 21 and the cross beam is partially converted into pressure between the joint surfaces of the mounting plate 21 and the cross beam through the rigid support, so that the load is not completely acted on the weld joint, the stress of the weld joint is reduced, and the weld joint is not easy to break; be equipped with strengthening rib 22 between mounting panel 21 and the connecting portion 11, be equipped with splice bar 23 between the adjacent mounting panel 21, strengthening rib 22 and splice bar 23 are welded fastening, through setting up strengthening rib 22 and splice bar 23, keep the vertical relation between mounting panel 21 and the crossbeam, avoid taking place the angle change rupture welding seam between mounting panel 21 and the crossbeam.

The method for using the beam and/or the beam assembly is shown in fig. 6, and the variable-section movable arm beam 1 and/or the beam assembly 2 is welded between two movable arm beams 3 through a fixing part 12 to form a movable arm assembly of the loader.

As a modification of the above-described cross member assembly, four mounting plates 21 may be provided to mount two bucket cylinders.

Can find out through above embodiment, the beneficial effects of the utility model are that: the cross beam adopts a variable cross section design, and the middle connecting part adopts a straight-edge arc-edge combined cross section to form a supporting function; the welding area of the fixing parts at the two ends is enlarged, so that the connection between the cross beam and the movable arm beam is more stable; the beam is integrally cast and formed, so that the beam has better integrity and higher integral strength, and is convenient for forming a complex curved surface; the beam structure can be independently used as a reinforcing support between two movable arm beams in the movable arm, and also can be applied to a beam assembly, so that the problem that a welding line in the beam assembly is stressed and cracked is effectively avoided; the movable arm overall structure is firmer and lighter, and is more suitable for the use of the lengthened movable arm. Meanwhile, the beam assembly manufactured by the beam structure can bear larger load, and the welding line is less stressed and not easy to damage.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A movable arm cross beam with a variable cross section is characterized by comprising a connecting part (11) and fixing parts (12) arranged at two ends of the connecting part (11), the cross section of the connecting part (11) comprises an upper straight edge (111-1), a lower straight edge (111-2), an upper bevel edge (112-1) and a lower bevel edge (112-2), one end of the upper straight edge (111-1) is connected with one end of the upper bevel edge (112-1), one end of the lower straight edge (111-2) is connected with one end of the lower bevel edge (112-2), the other end of the upper bevel edge (112-1) is in transition connection with the other end of the lower straight edge (111-2) through a rear arc (113-2), the other end of the lower bevel edge (112-2) is in transitional connection with the other end of the upper straight edge (111-1) through a front arc (113-1).

2. Variable-section boom crossmember according to claim 1, characterized in that the fixed end face of the fixed part (12) is circular with a diameter greater than the maximum distance between the front arc (113-1) and the rear arc (113-2), the fixed end face being intended for fixed connection with the boom beam.

3. Variable-section boom crossmember according to claim 2, characterized in that the rounded end face of the fixing portion (12) and the connecting portion (11) are in smooth transition.

4. The variable-section boom according to any one of claims 1 to 3, wherein the upper straight side (111-1) and the lower straight side (111-2) are symmetrical about the geometric center of the cross-section, the upper oblique side (112-1) and the lower oblique side (112-2) are symmetrical about the geometric center of the cross-section, and the front arc (113-1) and the rear arc (113-2) are symmetrical about the geometric center of the cross-section.

5. Variable-section boom crossbeam according to any of claims 1 to 3, characterised in that said connection portion (11) and said fixing portion (12) are cast in one piece.

6. A boom assembly, characterized in that, with a variable cross-section boom according to any of claims 2-4, a number of mounting plates (21) are mounted in parallel on the connecting portion (11), said mounting plates (21) being used for mounting a bucket cylinder.

7. The beam assembly according to claim 6, characterized in that the lower end of the mounting plate (21) is provided with a claw section (211), the inner contour of the claw section (211) grabbing and fitting the front arc (113-1), the upper straight edge (111-1), the upper oblique edge (112-1) and the rear arc (113-2).

8. Cross-beam assembly according to claim 6 or 7, characterized in that a reinforcement rib (22) is arranged between the mounting plate (21) and the connecting portion (11), and a connecting rib (23) is arranged between adjacent mounting plates (21).

9. Cross-beam assembly according to claim 6 or 7, characterized in that the connection portion (11) is welded to the mounting plate (21).

10. The beam assembly according to claim 8, wherein the reinforcing rib (22) and the mounting plate (21), the reinforcing rib (22) and the connecting portion (11), and the connecting rib (23) and the mounting plate (21) are welded and fixed.

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