Rear frame of loading machine

Abstract

The utility model relates to a rear frame of a loading machine, which comprises a hinged frame assembly, symmetrically arranged side plates, a middle beam frame, a tail plate, a baffle plate for mounting and fixing a machine cover through a bent plate and a middle partition plate for supporting the loading machine to separate an engine from a radiator, and reinforcing ribs are horizontally arranged at the joints of the rear end of the middle beam frame and the side plates respectively. The rectangular plate is obliquely welded between the reinforcing rib and the batten, so that the stress of the batten at the upper end of the side plate can be greatly reduced. The rear frame can be matched with installation and fixation of a hood and an independent radiator, stress borne by battens, used for fixing loader components, on the side plates is effectively reduced, the lifting lugs are welded to the middle positions of the outer sides of the side plates, and extrusion of a lifting appliance to the hood in the whole loader lifting process can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to loader technical field, concretely relates to a loader's rear frame. BACKGROUND

[0002] The statements herein only provide the background of the utility model related, and do not necessarily constitute the prior art.

[0003] At present, the loader is usually equipped with independent heat dissipation device, and the bonnet of the loader is also improved to adapt to the independent heat dissipation configuration of the loader. As a key component of the loader, most of the parts are installed on the rear frame. The rear frame structure of the prior art has the problem of being unable to adapt to the independent heat dissipation device of the loader and the corresponding bonnet shape. Moreover, the rear frame usually has two side plate assemblies on the left and right sides for bearing the weight of most of the parts, which causes the strip plates on the upper and lower sides of the side plates for fixing the components of the loader to bear a large stress, and the installation position of the lifting lugs is prone to cause the extrusion of the lifting appliance to the bonnet during hoisting. SUMMARY

[0004] The utility model aims at overcoming the defects of the prior art, and provides a rear frame of a loader, which can adapt to the installation and fixation of the independent heat dissipation device and the corresponding bonnet of the loader, effectively reduce the stress borne by the strip plates on the side plates for fixing the components of the loader, and avoid the extrusion of the lifting appliance to the bonnet during hoisting.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The embodiment of the utility model provides a rear frame of a loader, which comprises a hinged frame assembly, two symmetrical side plates, a middle beam frame and a tail plate. The hinged frame assembly and the tail plate are fixedly connected to the two ends of the side plates, and the middle beam frame is fixedly connected to the inner sides of the two side plates. The side plate is a plate-shaped structure with a front side width greater than a rear side. A first bent plate is fixedly connected to the upper side of the rear part of the side plate. A rectangular block is fixedly connected to the first bent plate. After the rectangular block is holed, the left baffle and the right baffle of the bonnet are respectively installed. Two symmetrical second bent plates are arranged on the outer side of the side plate. A trapezoidal flat plate is horizontally connected between each of the two second bent plates and the side plate to support the radiator of the loader. A fixed plate is vertically connected to the trapezoidal flat plate to cooperate with the trapezoidal plate to obliquely support the radiator. A reinforcing plate is fixedly connected to the upper part of the two sides of the middle beam frame and connected to the strip plate on the upper edge of the side plate. A rectangular plate is symmetrically arranged on the inner side of the side plate. A horizontal reinforcing rib is fixedly connected to the connection position between the rear end of the middle beam frame and the side plate. A rectangular reinforcing plate is obliquely arranged between the horizontal reinforcing rib and the rectangular plate.

[0007] Further, the articulated frame assembly is a square frame structure fixedly connected by an upper articulated frame, a rectangular tube and a lower articulated frame; the upper articulated frame is the upper part of the articulated frame assembly, the lower articulated frame is the lower part of the articulated frame assembly, and the rectangular tube is on the two sides of the articulated frame assembly; the rectangular tube is connected to the upper articulated plate of the upper articulated frame upward and to the lower articulated plate of the lower articulated frame downward; the steering cylinder seat is fixedly connected to the rectangular tube.

[0008] Further, the front ends of the two side plates are fixedly connected to the upper articulated frame and the lower articulated frame respectively; the middle beam frame is fixedly connected to the middle position of the side plate and is formed by four shallow U-shaped plates; the two ends of the shallow U-shaped plate are fixedly connected to the engine front leg plate, and the plate is provided with a hole for fixing the engine front leg; the two sides below the hole are provided with reinforcing ribs.

[0009] The tail plate is fixedly connected to the rear end of the side plate; the upper part of the tail plate is provided with a trapezoidal notch, and the lower part of the tail plate is provided with a rectangular notch at two corners; the tail plate is also provided with a through hole, and the through hole is connected to a nut on one side for fixing the counterweight.

[0010] Further, the part close to the front side of the side plate is symmetrically provided with a rectangular maintenance hole; the side plate starts to narrow at the maintenance hole and no longer narrows close to the middle beam frame; the upper edge of the rear part of the side plate is contracted downward to a second bending plate.

[0011] Further, the gearbox support is fixedly connected below the inner side of the maintenance hole; the gearbox support is a welded part of a flat plate and two reinforcing ribs below; the fourth bending plate is arranged below the gearbox support; the fourth bending plate is fixedly connected to the inner side of the side plate, one end of the fourth bending plate is fixedly connected to the articulated frame assembly, and the other end of the fourth bending plate is fixedly connected to the middle beam frame; the two rectangular plates are overlapped on the engine front leg plate on the two sides of the middle beam frame.

[0012] Further, the upper articulated frame and the lower articulated frame are fixedly connected by two shallow V-shaped articulated plates and a rectangular strip plate in the middle; the articulated plate is provided with an articulated hole for installing a pin shaft.

[0013] Further, the part close to the lower articulated frame of the rectangular tube is connected to a limiting block for limiting the turning angle of the loader; the upper part of the upper articulated frame is fixedly connected to two cab front supports for installing the cab and ensuring the stability of the cab; the upper end of the side plate is provided with a strip plate, and the cab rear support is fixedly connected to the strip plate; the cab rear support is arranged correspondingly to the cab front support to ensure the stable installation of the cab.

[0014] Further, one end of the second bending plate is fixedly connected to the side plate, and the other end of the second bending plate is fixedly connected to the tail plate; the second bending plate is provided with an oblong hole for passing various lines; the outer side of the second bending plate is also provided with a counterweight hanging block.

[0015] Further, the second bending plate and the side plate are connected with a third bending plate, the upper surface of the third bending plate is flush with the upper edge of the second bending plate, and the third bending plate is provided with a hole for fixing and supporting a middle partition plate on the loader.

[0016] Further, a lifting lug is arranged at the middle position of the outer side of the side plate.

[0017] The loader rear frame has the following beneficial effects:

[0018] 1. The rear frame can be adapted to the installation and fixation of the independent radiator and the corresponding hood of the loader. The first bending plate is fixedly connected to the upper side of the rear part of the side plate, the rectangular block is arranged on the first bending plate, the left baffle and the right baffle of the hood are installed and fixed through the holes in the rectangular block, the trapezoidal plate is arranged between the second bending plate and the side plate, the radiator of the loader is supported by the trapezoidal plate, the fixed plate is vertically connected to the trapezoidal plate, the radiator is obliquely supported by the trapezoidal plate and the fixed plate, the radiator of the loader is prevented from shaking relative to the frame under various complex working conditions, and the safe and reliable operation of the radiator is ensured, the third bending plate is arranged at the connection position of the second bending plate and the side plate, and the hole in the upper surface of the third bending plate is used for fixing and supporting the middle partition plate on the loader.

[0019] 2. The reinforcing plate is fixedly connected to the upper part of the middle beam frame, the strength of the frame is increased, the stress of the strip plate welded to the upper and lower edges of the left side plate and the right side plate is reduced, the horizontal reinforcing rib is fixedly connected to the connection position of the rear end of the middle beam frame and the side plate, and the rectangular reinforcing plate is arranged between the horizontal reinforcing rib and the rectangular plate, so that the stress of the strip plate above the rectangular reinforcing plate is greatly reduced.

[0020] 3. The lifting lug is welded to the middle position of the outer side of the side plate, the extrusion of the lifting lug on the hood during the hoisting of the loader is avoided, and the lifting lug is prevented from interfering with other components under various working conditions and when different wheels are installed. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the application, and together with the description of the application, serve to explain the application, and do not limit the application.

[0022] Figure 1 is a schematic view of the overall structure of the rear frame of the loader according to Embodiment 1 of the present application;

[0023] Figure 2 is a schematic view of the overall structure of the rear frame of the loader according to Embodiment 1 of the present application from another angle;

[0024] Figure 3is a front view of the rear frame of the embodiment 1 of the utility model;

[0025] Wherein, 1, articulated frame assembly, 2, left side plate, 3, right side plate, 4, cab front support, 5, cab rear support, 6, middle beam frame, 7, tail plate, 8, upper articulated frame, 9, rectangular tube, 10, steering cylinder seat, 11, lower articulated frame, 12, limit block, 13, first bending plate, 14, gearbox support, 15, second bending plate, 16, counterweight hanging block, 17, trapezoidal flat plate, 18, fixed plate, 19, third bending plate, 20, lifting lug, 21, fourth bending plate, 22, maintenance hole, 23, limit plate, 24, first connecting plate, 25, engine front support leg plate, 26, rectangular block, 27, rectangular plate, 28, second connecting plate, 29, reinforcing plate, 30, horizontal reinforcing rib, 31, rectangular reinforcing plate. DETAILED DESCRIPTION

[0026] Embodiment 1

[0027] The embodiment provides a rear frame of a loader, as Figure 1 The rear frame mainly comprises articulated frame assembly 1, symmetrically arranged left side plate 2 and right side plate 3, middle beam frame 6 and tail plate 7.

[0028] In the embodiment, as Figure 3 The front end of the rear frame is articulated frame assembly 1, which is mainly welded by upper articulated frame 8, rectangular tube 9 and lower articulated frame 11; upper articulated frame 8 is welded by two upper and lower shallow V-shaped articulated plates and a middle rectangular plate; the upper articulated plate is wider, the middle articulated plate is narrower, and the two articulated plates are provided with articulated holes for installing a pin shaft; lower articulated frame 11 is also welded by two upper and lower shallow V-shaped articulated plates and a middle rectangular plate; the upper articulated plate is narrower, the lower articulated plate is wider, and the two articulated plates are provided with articulated holes for installing a pin shaft; and steering cylinder seat 10 is fixedly connected to rectangular tube 9.

[0029] In the embodiment, articulated frame assembly 1 is a square frame structure from the front, and upper articulated frame 8 is on the top, lower articulated frame 11 is on the bottom, and rectangular tube 9 is on the left and right; the left and right rectangular tubes 9 are connected to the upper articulated plate of upper articulated frame 8 upwards and to the lower articulated plate of lower articulated frame 11 downwards.

[0030] The rear frame is connected to the front frame by using a pin shaft through the articulated holes of articulated frame assembly 1; steering cylinder seat 10 is welded by two upper and lower plates and a middle connecting plate, the steering cylinder of the loader is connected to steering cylinder seat 10 through a pin shaft, so that the loader steering is realized.

[0031] As Figure 2As shown, two limiting blocks 12 are welded to the part of the rectangular tube 9 near the lower hinge frame 11 to limit the loader's turning angle; two cab front supports 4 are welded to the top of the upper hinge frame 8 to install the cab and ensure the cab is stable and reliable.

[0032] like Figure 1 As shown, the upper hinge frame 8 and the lower hinge frame 11 are respectively connected to the left side plate 2 and the right side plate 3. The left side plate 2 and the right side plate 3 are plate-shaped structures that are wider at the front and narrower at the rear. The front part of the left side plate 2 and the right side plate 3 can form a pair with the space of the upper hinge plate of the upper hinge frame 8 and the lower hinge plate of the lower hinge frame 11. The left side plate 2 and the right side plate 3 have symmetrical rectangular maintenance holes 22 near the front, which facilitate maintenance and pipeline passage. The left side plate 2 and the right side plate 3 begin to narrow at the maintenance holes 22 and no longer narrow near the middle beam frame 6 (i.e., near the rear axle of the loader). The upper edge of the rear part of the left side plate 2 and the right side plate 3 tapers downward to the second bending plate 15 to match the shape of the hood and the independent heat dissipation system of the loader. A small foot is left at the rear end to increase the weld length to reduce the stress on the tail plate 7.

[0033] Figure 1 In the middle of the rear frame, there is a central beam 6, which is mainly used to fix the subframe. The central beam 6 is mainly welded from four shallow U-shaped flat plates, one at the front and one at the rear. Each plate has holes for mounting pins to pass through and connect the rear axle. Limiting plates 23 and first connecting plates 24 are set between the four shallow U-shaped flat plates, so that the distance between the two front plates and the distance between the two rear plates are equal and smaller than the distance between the two middle plates. An engine front support leg plate 25 is welded to each of the left and right ends of the four shallow U-shaped flat plates. The plate has holes for fixing the engine front support leg, and two reinforcing ribs are welded to both sides below the holes to increase strength.

[0034] A tail plate 7 is fixedly connected to the rear end of the side plate. The main function of the tail plate 7 is to fix the counterweight. A trapezoidal notch is left at the top of the tail plate 7 to fit the rear windshield of the K-generation engine hood. Rectangular notches are left at the two corners at the bottom to fit the counterweight. A through hole is opened on the tail plate 7. A nut is welded to one side of the through hole to realize the function of fixing the counterweight.

[0035] Strips are welded to the upper and lower edges of the inner sides of the left side plate 2 and the right side plate 3. These strips can both reinforce the rear frame and fix some loader components, pipelines, etc. The cab rear support 5 is welded to the strips on the upper side of the left side plate 2 and the right side plate 3 respectively. The two cab rear supports 5 have a relative positional relationship with the two cab front supports 4 on the articulated frame assembly 1, thereby achieving stable installation of the cab.

[0036] First bent plates 13 are welded to the upper rear of the left side plate 2 and the right side plate 3, respectively. Two rectangular blocks 26 are welded to each of the two first bent plates 13. Holes are drilled in the rectangular blocks 26 to install the left and right baffles of the K-generation aircraft hood. For example... Figure 2 As shown, a gearbox support 14 is welded to the lower inner side of the maintenance holes on the left side plate 2 and the right side plate 3 to fix the gearbox. The gearbox support 14 is a welded joint of a flat plate and two reinforcing ribs below it. A fourth bent plate 21 is provided on the lower side of the gearbox support 14. The fourth bent plate 21 is fixedly connected to the inner side of the side plate. One end is fixedly connected to the hinge frame assembly 1 and the other end is fixedly connected to the middle beam frame 6. The horizontal section of the fourth bent plate 21 is aligned with the lower edge of the left side plate 2 and the right side plate 3. Rectangular plates 27 are also symmetrically provided on the inner side of the side plate. The two rectangular plates 27 overlap on the left and right engine front support legs 25 of the middle beam frame 6. A second connecting plate 28 is welded to the rear end of the rectangular plate 27. The front end of the second connecting plate 28 overlaps on the rectangular plate 27 and the rear end is connected to the tail plate 7. A small foot is left at the rear end to reduce the stress on the tail plate 7. A through hole is opened on the second connecting plate 28 for fixing the fuel tank of the loader.

[0037] like Figure 2 As shown, a reinforcing plate 29 is welded to the upper sides of the middle beam 6. The reinforcing plate 29 is connected upward to the strips on the upper edge of the left side plate 2 and the right side plate 3. The reinforcing plate can increase the strength of the frame and reduce the stress on the strips welded to the upper and lower edges of the left side plate 2 and the right side plate 3.

[0038] A horizontal reinforcing rib 30 is welded horizontally at the connection between the rear end of the middle beam 6 and the left side plate 2 and the right side plate 3. A rectangular reinforcing plate 31 is then welded diagonally between the horizontal reinforcing rib 30 and the rectangular plate 27, which can significantly reduce the stress on the rectangular plate 27 above it.

[0039] A second bending plate 15 is symmetrically arranged on the outer side of the left side plate 2 and the right side plate 3. The front end of the second bending plate 15 is welded to the left side plate 2 and the right side plate 3 respectively, and the rear end is welded to the tail plate 7. The second bending plate 15 has an elongated hole for various lines to pass through. A counterweight hanging block 16 is welded to the outer side of each of the two second bending plates 15 to hold the counterweight and limit the up and down movement of the counterweight.

[0040] like Figure 3As shown, a trapezoidal flat plate 17 is horizontally welded between each of the two second bending plates 15 and the left side plate 2 and the right side plate 3, and is used to support the radiator of the loader, and a long round hole is formed in the trapezoidal flat plate 17 close to the tail plate 7, and is used as a drain hole; a fixing plate 18 is vertically welded on the trapezoidal flat plate 17, and is used to cooperate with the trapezoidal plate 17 to support the radiator in a diagonal manner, so as to avoid the shaking of the radiator relative to the frame under various complex working conditions, and to ensure the safe and reliable operation of the radiator; a third bending plate 19 is welded at the connection between each of the two second bending plates 15 and the left side plate 2 and the right side plate 3, and the upper surface of the third bending plate 19 is flush with the upper edge of the second bending plate 15; a hole is formed in the upper surface of the third bending plate 19, and is used to fix and support the middle partition plate of the loader which separates the engine and the radiator.

[0041] In the embodiment, the lifting lug 20 is welded at the middle position of the outer side of the left side plate 2 and the right side plate 3, so that the extrusion of the lifting tool on the hood during the hoisting of the loader can be avoided, and the interference between the lifting lug 20 and other components under various working conditions and the installation of different wheels can also be avoided.

[0042] Although the specific embodiments of the utility model have been described in combination with the drawings, the description is not a limitation on the protection scope of the utility model, and those skilled in the art should understand that various modifications or deformations made on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A rear frame of a loader, characterized in that, The articulated frame assembly, two symmetrical side plates, a middle beam frame and a tail plate; the articulated frame assembly and the tail plate are fixedly connected at both ends of the side plate, and the middle beam frame is fixedly connected at the inner side of the two side plates; The side plate is a plate structure with a front side width greater than a rear side, and a first bent plate is fixedly connected to the upper side of the rear part of the side plate, and a rectangular block is fixedly connected to the first bent plate, and the left and right baffle plates of the bonnet are respectively installed after the rectangular block is holed; two symmetrical second bent plates are further provided on the outer side of the side plate, and a trapezoidal flat plate is horizontally connected between the second bent plates and the side plate to support the radiator of the loader; a fixed plate is vertically connected to the trapezoidal flat plate to obliquely support the radiator in cooperation with the trapezoidal plate. The upper part of the middle beam frame is fixedly connected with a reinforcing plate, and the reinforcing plate is connected to the upper edge of the side plate; the inner side of the side plate is further provided with a rectangular plate, and a horizontal reinforcing rib is fixedly connected to the connecting part of the middle beam frame and the side plate, and a rectangular reinforcing plate is obliquely arranged between the horizontal reinforcing rib and the rectangular plate.

2. A rear frame for a loader as set forth in claim 1, characterized in that The articulated frame assembly is a square frame structure fixedly connected by an upper articulated frame, a rectangular tube and a lower articulated frame; the upper part of the articulated frame assembly is the upper articulated frame, the lower part is the lower articulated frame, and the two sides are the rectangular tube, which is connected to the upper articulated plate of the upper articulated frame upward and to the lower articulated plate of the lower articulated frame downward, and a steering cylinder seat is fixedly connected to the rectangular tube.

3. A rear frame for a loader as set forth in claim 2, wherein, The front end of the two side plates is fixedly connected with the upper articulated frame and the lower articulated frame respectively, the middle beam frame is fixedly connected at the middle position of the side plate and is fixedly connected by four shallow U-shaped flat plates, the two ends of the shallow U-shaped flat plate are fixedly connected with the engine front leg plate, and the plate is holed for fixing the engine front leg, and the two sides below the hole are provided with reinforcing ribs.

4. A rear frame for a loader as set forth in claim 1, wherein, The tail plate is fixedly connected at the rear end of the side plate, the upper part of the tail plate is provided with a trapezoidal notch, and the lower part of the two corners is provided with a rectangular notch; a through hole is further provided on the tail plate, and one side of the through hole is connected with a nut for fixing the counterweight.

5. A rear frame for a loader as set forth in claim 1, wherein, The part close to the front side of the side plate is symmetrically provided with a rectangular maintenance hole, the side plate starts to narrow at the maintenance hole, and does not narrow again close to the middle beam frame, and the upper edge of the rear part of the side plate is contracted downward to the second bent plate; The transmission case support is fixedly connected below the inner side of the side plate, and is a welded part of a flat plate and two reinforcing ribs below; A fourth bent plate is provided below the transmission case support, and the fourth bent plate is fixedly connected to the inner side of the side plate, one end of which is fixedly connected with the articulated frame assembly and the other end is fixedly connected with the middle beam frame; two rectangular plates are overlapped on the engine front leg plate on both sides of the middle beam frame.

6. A rear frame for a loader as set forth in claim 3, wherein The upper articulated frame and the lower articulated frame are fixedly connected by two shallow V-shaped articulated plates and a rectangular strip plate in the middle, and the articulated plate is holed for installing a pin shaft.

7. A rear frame for a loader as set forth in claim 2, wherein The part close to the lower articulated frame of the rectangular tube is connected with a limiting block for limiting the turning angle of the loader; the upper part of the upper articulated frame is fixedly connected with two cab front supports for installing the cab and ensuring the stable and reliable cab; the upper end of the side plate is provided with a strip plate, and the strip plate is fixedly connected with a cab rear support which is correspondingly arranged with the cab front support to ensure the stable installation of the cab.

8. A rear frame for a loader as set forth in claim 1, wherein, The second bending plate is fixedly connected at one end to the side plate and at the other end to the tail plate; a long circular hole is formed in the second bending plate for passing various lines; and a counterweight hanging block is further arranged outside the second bending plate.

9. A rear frame for a loader as set forth in claim 8, wherein, A third bending plate is further arranged at the connection between the second bending plate and the side plate, the upper plane of the third bending plate is flush with the upper edge of the second bending plate; a hole is formed in the third bending plate for fixing and supporting a middle partition plate on the loader, and the middle partition plate is used for separating the engine and the radiator.

10. A rear frame for a loader as set forth in claim 1, wherein, A lifting lug is further arranged at the middle position outside the side plate.

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