Front frame of loading machine

Abstract

The utility model discloses a loader front frame and a loader, and belongs to the technical field of engineering machinery. The loader front frame comprises a front middle beam, a left side box and a right side box, the left side box and the right side box are fixedly arranged at the two ends of the front middle beam respectively in a mirror symmetry mode, and an upper hinge seat and a lower hinge seat which are distributed at intervals are fixedly arranged between the two wing boxes. The side box comprises an inner side plate and an outer side plate, the inner side plate and the outer side plate are parallel to each other, the inner side plate and the outer side plate are both connected to the axle through the rib plate, a double-plate stress side box structure is formed, and meanwhile integrated connection of the front frame and the axle is achieved. According to the double-plate stress structure, the problem that the connecting part is weak due to existing single-plate stress is solved, the rib plates are used for replacing an existing bolt connecting mode, integrated connection of the front frame and the axle is achieved, the overall connecting strength is improved, and the impact load of the whole vehicle and materials is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and particularly relates to a front frame of a loader. Background Art

[0002] The front frame of a loader is an important load-bearing component of the loader. It is mainly used to connect the rear frame and the working device system, and transfer the force borne by the working device to the ground during operation. Therefore, it is subjected to large forces and has high structural requirements.

[0003] With the increasing market share of large-tonnage hybrid loaders, the strength of the front frame of the loader faces a severe test. The existing front frame of the loader mainly bears part of the weight of the whole vehicle during normal driving and most of the weight of the material and the whole vehicle when the rear wheels leave the ground during the loading process. Therefore, how to improve the strength of the front frame has become a major problem faced by designers.

[0004] As Figure 1 shown, the existing front frame of the loader and the axle are mostly connected by bolts, and the side plate and the bottom plate are connected by a single plate. The overall connection part is relatively weak, resulting in a relatively high overall stress at the connection position between the front frame and the axle, so the failure rate is also increasing. Content of the Utility Model

[0005] The purpose of the utility model is to provide a front frame of a loader, which can improve the overall connection strength between the frame and the axle and reduce the impact load of the whole vehicle and the material.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The front frame of the loader includes a front middle beam and left and right side boxes. The left and right side boxes are mirror-symmetric and are respectively fixedly arranged at both ends of the front middle beam. Upper hinge seats and lower hinge seats are fixedly arranged between the two side boxes at intervals.

[0008] The side box includes an inner side plate and an outer side plate. The inner side plate and the outer side plate are parallel to each other. The inner side plate and the outer side plate are both connected to the axle through rib plates, forming a side box structure with double-plate stress, and realizing the integrated connection of the front frame and the axle at the same time.

[0009] Furthermore, the internal structures of the inner side plate and the outer side plate are both hollowed out.

[0010] The internal structures of both the inner and outer side plates are hollowed out, so that the inner and outer side plates are lightened, and the overall weight of the front frame is reduced without affecting the overall strength.

[0011] Furthermore, inside the side box, a connecting component is arranged between the inner side plate and the outer side plate. The connecting component includes an upper reinforcing plate, a middle reinforcing plate and a bearing.

[0012] Further, the connecting components inside the side boxes are successively and spacedly provided with an upper reinforcing plate, a middle reinforcing plate and a bearing from top to bottom.

[0013] Further, the front middle beam includes a seat plate, ear plates and a top plate. The seat plate and the top plate are fixedly connected, and both ends of the seat plate and both ends of the top plate are respectively fixedly connected to the left and right side boxes. The ear plates are fixedly arranged on the top plate.

[0014] Further, when the top plate is fixedly connected to the left and right side boxes, two left and right reinforcing ribs are used for further fixed connection.

[0015] Further, the middle part of the seat plate is provided with a circular opening. The bottom end of the seat plate is connected to the axle, and the middle part of the axle part connected to the seat plate is designed with an annular opening.

[0016] Further, the ear plates include left and right ear plates, which are symmetrically distributed in a mirror image and are fixedly arranged on the top plate.

[0017] Further, the seat plate and the axle are in the form of butt welding.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. The left and right side boxes of the front frame of the loader both adopt an inner and outer double-side plate structure, and the double-side plates are both connected to the axle by using rib plates, forming a side box structure with double plates bearing force, avoiding stress concentration, and the front frame and the axle form an integral structure, improving the overall strength of the front frame and greatly reducing the impact load of the whole vehicle and the materials.

[0020] 2. The inner and outer side plates are subjected to lightweight treatment, effectively reducing the overall weight of the front frame.

[0021] 3. The integral connection between the front frame and the axle changes the bolt connection method in the prior art, reducing both the casting difficulty of the original frame base and improving the overall strength of the frame. Description of the Drawings

[0022] In order to clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a structural schematic diagram of the existing front frame of the loader;

[0024] Figure 2Schematic three-dimensional view of a front frame structure of a loader according to an embodiment of the present invention.

[0025] Figure 3 Top view of a front frame structure of a loader according to an embodiment of the present invention;

[0026] Figure 4 Rear view of a front frame structure of a loader according to an embodiment of the present invention;

[0027] Figure 5 Right view of a front frame structure of a loader according to an embodiment of the present invention;

[0028] In the figure: 1, left box; 2, right box; 3, outer plate; 4, inner plate; 5, reducer; 6, rib plate; 7, axle; 8, upper reinforcement plate; 9, middle reinforcement plate; 10, bearing; 11, seat plate; 12, ear plate; 13, top plate. Detailed implementation mode

[0029] The present invention will be described in detail below with reference to the accompanying drawings:

[0030] See Figure 1 , in the prior art, the front frame of the loader is connected to the axle by bolts, and the side plate and the bottom plate are connected by a single plate. The overall connection part is relatively weak, resulting in a relatively high overall stress at the connection position between the front frame and the axle. Therefore, the failure rate is also getting higher and higher.

[0031] See Figures 2-5 , in the present invention, the front frame of the loader includes: a front middle beam and left and right boxes. The left and right boxes are mirror-symmetrical and are respectively fixedly arranged at both ends of the front middle beam. Upper hinge seats and lower hinge seats are fixedly arranged between the two side boxes at intervals; the side box includes an inner plate and an outer plate. The inner plate and the outer plate are parallel to each other, and the inner plate and the outer plate are both connected to the axle through rib plates, forming a side box structure with double-plate stress, and at the same time realizing the integrated connection of the front frame and the axle.

[0032] The front frame of the loader is connected to the axle, and reducers are connected to both ends of the axle.

[0033] The internal structure of the inner plate is hollowed out without affecting the overall strength, such as a circle in this embodiment. The internal structure of the outer plate is also hollowed out without affecting the overall strength, such as an irregular hollowing treatment in this embodiment.

[0034] The internal structures of both the inner side plate and the outer side plate are hollowed out to lighten the side plates, reducing the overall weight of the front frame without affecting the overall strength of the front frame. Among them, the internal structures of the inner side plate and the outer side plate are mainly designed considering the lightweight of the front frame body and the layout of other structural parts, and corresponding adjustments are made according to different models and different layout arrangements. The thickness and material of the outer side plate are the same as those of the inner side plate, which are the same as the existing technology and will not be elaborated here.

[0035] The side box structure with double plates bearing force improves the overall strength of the front frame of the loader and reduces stress concentration.

[0036] A side box bottom plate is provided at the bottom of the side box, and it is hollowed out. Such as Figure 3 the similar rectangular shape in it to further reduce the overall weight of the front axle. Among them, the specific hollowed-out shape is adjusted accordingly according to different models and different layout arrangements.

[0037] Such as Figure 4 shown, inside the side box, connecting components are arranged between the inner side plate and the outer side plate. The connecting components include an upper reinforcing plate, a middle reinforcing plate and a bearing. The connecting components inside the side box are arranged at intervals in sequence from top to bottom as the upper reinforcing plate, the middle reinforcing plate and the bearing. The connecting components are located in the middle of the side box. The distance interval is mainly designed considering other structures connected to it, including the boom cylinder, etc., and can be adjusted as needed.

[0038] The sequential arrangement of the upper reinforcing plate, the middle reinforcing plate and the bearing inside the side box improves the connection strength between the inner and outer double side plates, makes the force more stable, ensures the overall structural stability of the side box, and because the inner and outer double side plates are connected to the axle by rib plates, it also further improves the overall strength of the frame and the axle, reduces the concentrated stress, and thus reduces the occurrence of failure rate. The front middle beam includes a seat plate, an ear plate and a top plate. The seat plate and the top plate are fixedly connected, and both ends of the seat plate and both ends of the top plate are respectively fixedly connected to the left and right side boxes. The ear plate is fixedly arranged on the top plate.

[0039] When the top plate is fixedly connected to the left and right side boxes, two left and right reinforcing ribs are used for further fixed connection.

[0040] The middle part of the seat plate is circularly open. The bottom end of the seat plate is connected to the axle, and the part of the axle connected to the seat plate has a circular opening design in the middle.

[0041] In the prior art, as Figure 1 shown, when the seat plate is connected to the axle, the part of the axle connected to the seat plate is a closed structure. While in the present utility model, the axle part is hollowed out, as Figure 2The annular hollowing treatment shown. While not affecting the connection strength between the front frame and the axle, it can reduce its overall weight. The specific shape of the hollowing can be adjusted accordingly for different models and different layout arrangements.

[0042] Among them, the seat plate and the axle are connected by butt welding. Due to the integrated design of the front frame and the axle and the design of the double-side plate stress structure, the structure of the front frame is superior in strength to the prior art, and its weld stress is also within the safe range.

[0043] The ear plates include left and right ear plates, which are symmetrically distributed in a mirror image and are fixedly arranged on the top plate.

[0044] In this embodiment, all fixed connections are made by welding, which makes the processing simple and has high connection strength.

[0045] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0046] Of course, the above description is not a limitation to the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the substantial scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. Front frame of a loader, characterized in that, Comprising: A front middle beam and left and right side boxes, The left and right side boxes are mirror-symmetrical and are respectively fixedly arranged at both ends of the front middle beam; The side box comprises an inner side plate and an outer side plate. The inner side plate and the outer side plate are parallel to each other. The inner side plate and the outer side plate are both connected to the axle through rib plates, forming a side box structure with double-plate stress, and at the same time realizing the integrated connection of the front frame and the axle.

2. The front frame of the loader according to claim 1, wherein: The internal structure of the inner side plate is hollowed out.

3. The front frame of the loader according to claim 1, characterized in that, The internal structure of the outer side plate is hollowed out.

4. The front frame of the loader according to claim 1, characterized in that: Inside the side box, a connecting component is arranged between the inner side plate and the outer side plate. The connecting component comprises an upper reinforcing plate, a middle reinforcing plate and a bearing.

5. The front frame of the loader according to claim 4, characterized in that: For the connecting component inside the side box, the upper reinforcing plate, the middle reinforcing plate and the bearing are sequentially arranged at intervals from top to bottom.

6. The front frame of the loader according to claim 1, wherein: The front middle beam comprises a seat plate, an ear plate and a top plate. The seat plate and the top plate are fixedly connected, and both ends of the seat plate and both ends of the top plate are respectively fixedly connected to the left and right side boxes. The ear plate is fixedly arranged on the top plate.

7. The front frame of the loader according to claim 6, characterized in that: When the top plate is fixedly connected to the left and right side boxes, two left and right reinforcing ribs are used for further fixed connection.

8. The front frame of the loader according to claim 6, characterized in that: The middle part of the seat plate is circularly opened. The bottom end of the seat plate is connected to the axle, and the middle part of the axle part connected to the seat plate is designed with an annular opening.

9. The front frame of the loader according to claim 6, characterized in that: The ear plate comprises left and right ear plates, which are mirror-symmetrically distributed and fixedly arranged on the top plate.

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