Frame tail beam of off-highway mining dump truck, frame and off-highway mining dump truck

Abstract

The utility model discloses an off-highway mining dump truck frame tail beam, a frame and an off-highway mining dump truck, the frame tail beam comprises a tubular beam connected between the tail part of a left longitudinal beam of the frame and the tail part of a right longitudinal beam of the frame, and further comprises a protective shell arranged between the tail part of the left longitudinal beam of the frame and the tail part of the right longitudinal beam of the frame, and the top, the rear part and part of the bottom of the tubular beam are covered. The top and the rear portion of the tubular beam are sealed through the protective shell, and the bending rigidity and the torsional rigidity of the frame tail beam are improved; the bottom of the tubular beam is partially closed, so that an arrangement space is vacated for a rear overhang transverse pushing support.

Description

TECHNICAL FIELD

[0001] The utility model relates to off -highway mining dump truck field, more specifically, the utility model relates to off -highway mining dump truck frame tail beam, frame and off -highway mining dump truck. BACKGROUND

[0002] The existing dump truck frame has cast, plate piece tailor-welded type tail beam, adopts cast longitudinal beam tail seat, and round pipe beam as reinforcing beam, although single pipe beam satisfies the strength demand, but cast tail seat has the common fault that period is long, cost is high, and cast defect is difficult to control, pure plate tailor-welded type frame tail beam adopts box tailor-welding mostly, and closed structure is used to strengthen frame tail stiffness, strength, but the closed box structure occupies large frame internal space, and the arrangement of rear suspension components such as horizontal push support is inconvenient. CONTENT OF UTILITY MODEL

[0003] The utility model discloses off -highway mining dump truck frame tail beam, frame and off -highway mining dump truck, overcome the shortcoming of the existing cast, plate piece tailor-welded type tail beam production period is long, cost is high, and cast defect is difficult to control, solve the problem that pure plate tailor-welded type frame tail beam box structure occupies large frame internal space.

[0004] In order to realize according to the utility model these purposes and other advantages, provide a kind of off -highway mining dump truck frame tail beam, including the pipe beam being connected between the tail portion of frame left longitudinal beam and the tail portion of frame right longitudinal beam, still include:

[0005] Shell is arranged between the tail portion of frame left longitudinal beam and the tail portion of frame right longitudinal beam, and cover the top, rear portion and part bottom of the pipe beam, for strengthening the pipe beam.

[0006] Preferably, the shell is integrally formed.

[0007] Preferably, the shell includes first plate body, second plate body, third plate body, fourth plate body and fifth plate body fixedly connected in sequence, and the included angle is formed between two adjacent plate bodies.

[0008] Preferably, the shell is a bending member formed by bending, and the number of bending times of the bending member is not less than 2.

[0009] Preferably, the shell is C-shaped structure.

[0010] Preferably, the off -highway mining dump truck frame tail beam further includes:

[0011] First reinforcing plate and second reinforcing plate, the first reinforcing plate is fixedly connected with the inner side of frame left longitudinal beam, and the second reinforcing plate is fixedly connected with the inner side of frame right longitudinal beam.

[0012] The first reinforcing plate and the second reinforcing plate are provided with through holes for accommodating the pipe beam.

[0013] Preferably, the left side of the shell is fixedly connected with the first reinforcing plate, and the right side of the shell is fixedly connected with the second reinforcing plate.

[0014] Preferably, a recess is arranged in the middle of the front end of the plate body covering the partial bottom of the pipe beam.

[0015] The utility model also provides a non -highway mining dump truck frame, non -highway mining dump truck frame of above -mentioned sets up non -highway mining dump truck frame tail beam.

[0016] The utility model also provides a non -highway mining dump truck, non -highway mining dump truck of above -mentioned sets up non -highway mining dump truck frame tail beam.

[0017] The utility model at least includes following beneficial effects:

[0018] 1, the shell closes pipe beam top and rear portion, increased the frame tail beam bending, torsional rigidity, pipe beam bottom partial closure, for rear suspension horizontal push support freed the arrangement space;

[0019] 2, the reinforcing plate enhances the structural strength and torsional rigidity of frame tail beam, improves the carrying capacity.

[0020] 3, the recess arranged in the middle of the front end of the plate body covering the partial bottom of the pipe beam can weaken stress transmission when the frame is subjected to torsional force, reducing the risk of cracking in the welding of the inner side of the longitudinal beam. Meanwhile, the recess can also reduce weight.

[0021] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The utility model embodiment described non -highway mining dump truck frame tail beam's structure schematic view;

[0023] Figure 2 The utility model embodiment described shell's structure schematic view;

[0024] In the figure, 1 is a left longitudinal beam of the frame, 2 is a right longitudinal beam of the frame, 3 is a pipe beam, 4 is a shell, 5 is a rear suspension longitudinal push support, and 6 is a second reinforcing plate.

[0025] 401 is a first plate body, 402 is a second plate body, 403 is a third plate body, 404 is a fourth plate body, and 405 is a fifth plate body. DETAILED DESCRIPTION

[0026] The utility model makes further detailed description in combination with the drawings, to enable the person skilled in the art to implement with reference to the description text.

[0027] It should be noted that in the description of the utility model, the terms "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0028] As shown in Figure 1 The utility model provides a non -highway mining dump truck frame tail beam, including the pipe beam 3 of connecting in the tail part of frame left side vertical frame 1 and the tail part of frame right side vertical frame 2, still including:

[0029] The shell 4 is arranged between the tail part of frame left side vertical frame 1 and the tail part of frame right side vertical frame 2, and covers the top, rear and part bottom of the pipe beam 3, for strengthening the pipe beam 3.

[0030] Specifically, the shell 4 is integrally formed, for example: the shell 4 can be a casting, or the shell 4 can be a bending piece.

[0031] Specifically, the shell 4 is C-shaped structure.

[0032] When the shell 4 is a bending piece formed by bending, the bending number of the bending piece is not less than 2 times.

[0033] Exemplarily, as shown in Figure 2 The shell 4 can be a one-piece four-way bending, including first plate body 401, second plate body 402, third plate body 403, fourth plate body 404 and fifth plate body 405 fixedly connected in sequence, and a clamping angle is formed between adjacent two plate bodies.

[0034] For the simple pipe beam 3 structure, the prior art simple pipe beam 3 structure is insufficient to protect the rear axle stiffening beam and is prone to breakage. The embodiment forms a more stable structure by arranging the shell 4 between the tail part of frame left side vertical frame 1 and the tail part of frame right side vertical frame 2 to cover the top, rear and part bottom of the pipe beam 3, changes the stress state of the simple pipe beam 3, reduces the risk of breakage caused by external force concentration, greatly enhances the protection of the rear axle stiffening beam, and improves the reliability and durability of the structure.

[0035] For the closed box structure, there are problems of small space in the box, the rear suspension horizontal push support 5 cannot be arranged or inconvenient to maintain. The design of the embodiment avoids these drawbacks of the closed box structure, while closing the tail of the vehicle frame, reasonably utilizes the space, so that the rear suspension horizontal push support 5 can be conveniently arranged, meets the needs of vehicle structure design and function realization, and is more convenient to maintain, reduces the maintenance cost and difficulty.

[0036] In addition, the working environment of the off-highway mining dump truck is harsh, and the pipe beam 3 is exposed and is easy to be collided and scratched by objects such as ore and tools. The protective shell 4 covers the top, rear and part of the bottom of the pipe beam 3, and can also protect the pipe beam 3.

[0037] At the same time, the protective shell 4 is made of multiple bent plates, and the manufacturing process is relatively simple, which has obvious advantages in production and manufacturing. The simple manufacturing process means that the production cost can be reduced, the complex operation and technical difficulties in the production process can be reduced, and the production efficiency can be improved. The simple process is also conducive to ensuring the stability of product quality, reducing the rate of defective products, so that the design is more feasible and has more promotional value in actual production.

[0038] In another embodiment, the off-highway mining dump truck frame tail beam further comprises:

[0039] The first reinforcing plate is fixedly connected to the inner side of the left longitudinal beam 1 of the frame, and the second reinforcing plate 6 is fixedly connected to the inner side of the right longitudinal beam 2 of the frame.

[0040] The first reinforcing plate and the second reinforcing plate 6 are provided with through holes for accommodating the pipe beam 3.

[0041] The reinforcing plates are respectively connected to the inner sides of the tail portions of the left longitudinal beam 1 and the right longitudinal beam 2 of the frame, which is like adding a reinforcing layer between the longitudinal beams of the frame and the pipe beam 3. This makes the frame tail beam have more support points and force transmission paths when bearing vertical pressure and horizontal impact force.

[0042] The reinforcing plates are provided with through holes for accommodating the pipe beam 3, which makes the installation position of the pipe beam 3 more accurate and stable. After the pipe beam 3 passes through the through hole, it can be better aligned with the longitudinal beams of the frame on the same axis, ensuring the symmetry and balance of the overall structure of the frame tail beam.

[0043] In another embodiment, the left side of the protective shell 4 is fixedly connected to the first reinforcing plate, and the right side of the protective shell 4 is fixedly connected to the second reinforcing plate 6.

[0044] The left and right ends of the protective shell 4 are respectively connected to a pair of reinforcing plates, so that the protective shell 4, the pipe beam 3 and the reinforcing plates are tightly connected together to form a more stable connection structure.

[0045] The combination design of the reinforcing plate, the tube beam 3 and the shell 4 enables them to cooperate and support each other. The reinforcing plate strengthens the connection between the frame longitudinal beam and the tube beam 3, and the shell 4 strengthens the protection of the tube beam 3 and is connected with the reinforcing plate. Such a structure optimizes the force transmission path, so that each part of the frame tail beam can resist bending, torsion and impact and other complex external forces as a whole.

[0046] In another embodiment, the shell 4 covers the part of the bottom of the plate body front end of the tube beam 3, and a recess is arranged in the middle of the plate body front end. For example, the recess adopts a smooth concave curve transition, and the shell 4 covers the part of the bottom of the plate body front end of the tube beam 3, and the whole plate body front end is in the shape of a horn.

[0047] When the off-highway mining dump truck drives on the complex road conditions in the mine, the frame will be subjected to forces in various directions, among which the torsional force is common and has a great influence on the frame structure. The recess (such as a smooth concave curve transition in the shape of a horn) arranged at the part of the bottom of the plate body front end of the shell 4 covering the tube beam 3 changes the stress transmission path. When the frame is subjected to torsional force, the special-shaped recess can disperse the stress and avoid stress concentration in certain specific parts. Stress concentration is an important reason for causing premature damage of materials and structural failure, and the existence of the recess enables the stress to be more evenly distributed in the shell 4 and other parts of the frame, thereby effectively weakening the stress transmission and improving the fatigue resistance and reliability of the frame tail beam structure.

[0048] The left longitudinal beam 1, the right longitudinal beam 2 and the components (such as the reinforcing plate, the shell 4, etc.) connected therewith are usually connected by welding. During the driving of the vehicle, especially when subjected to torsional force, the welding part is prone to bear a large stress. The “horn” transition design at the front end of the shell 4 can reduce the stress concentration at the welding part on the inner side of the longitudinal beam. Because stress concentration increases the risk of cracking at the welding part, the smooth transition of the recess enables the stress to be weakened and dispersed to a certain extent when transmitted to the welding part, thereby reducing the local stress borne by the welding part and reducing the possibility of cracking at the welding part on the inner side of the longitudinal beam, prolonging the service life of the frame tail beam and reducing the maintenance cost and safety hazards caused by the cracking of the welding part.

[0049] Moreover, without affecting the key performance of the vehicle, the weight is reduced by arranging the recess, so that the inertial force that needs to be overcome by the vehicle during driving is reduced, the acceleration and braking performance can be improved to a certain extent, the fuel consumption is also reduced accordingly, and the operating cost is reduced.

[0050] The utility model also provides a non -highway mining dump truck frame, non -highway mining dump truck frame sets up above -mentioned non -highway mining dump truck frame tail beam. Therefore, the non -highway mining dump truck frame has same advantage with above -mentioned embodiment non -highway mining dump truck frame tail beam.

[0051] The utility model also provides a non -highway mining dump truck, non -highway mining dump truck sets up above -mentioned non -highway mining dump truck frame tail beam. Therefore, the non -highway mining dump truck has same advantage with above -mentioned embodiment non -highway mining dump truck frame tail beam.

[0052] Although the embodiments of the utility model have disclosed as above, it is not limited to the application listed in the specification and the embodiments only, it can be applied to various fields suitable for the utility model, and other modifications can be easily realized by those skilled in the art, therefore, the utility model is not limited to specific details and the figures shown and described herein under the general concept defined by the claims and the equivalent range.

Claims

1. A tail beam for a non-highway mining dump truck frame, comprising a tubular beam connecting the tail of the left longitudinal beam and the tail of the right longitudinal beam of the frame, characterized in that, Also includes: A protective shell is disposed between the tail of the left longitudinal beam and the tail of the right longitudinal beam of the frame, and covers the top, rear and part of the bottom of the tube beam, for reinforcing the tube beam.

2. The off-highway mining dump truck frame tail beam as described in claim 1, characterized in that, The protective shell is molded in one piece.

3. The off-highway mining dump truck frame tail beam as described in claim 1, characterized in that, The protective shell includes a first plate, a second plate, a third plate, a fourth plate, and a fifth plate that are fixedly connected in sequence, with an included angle between adjacent plates.

4. The off-highway mining dump truck frame tail beam as described in claim 1, characterized in that, The protective shell is a bent part formed by bending, and the bent part is bent no less than twice.

5. The off-highway mining dump truck frame tail beam as described in claim 1, characterized in that, The protective shell has a C-shaped structure.

6. The off-highway mining dump truck frame tail beam as described in claim 1, characterized in that, Also includes: A first reinforcing plate and a second reinforcing plate, wherein the first reinforcing plate is fixedly connected to the inner side of the left longitudinal beam of the frame, and the second reinforcing plate is fixedly connected to the inner side of the right longitudinal beam of the frame; Both the first reinforcing plate and the second reinforcing plate are provided with through holes for accommodating the tubular beam.

7. The off-highway mining dump truck frame tail beam as described in claim 6, characterized in that, The left side of the protective shell is fixedly connected to the first reinforcing plate, and the right side of the protective shell is fixedly connected to the second reinforcing plate.

8. The off-highway mining dump truck frame tail beam as described in claim 1, characterized in that, The protective shell has a recessed portion in the middle of the front end of the plate covering the bottom of the tube beam.

9. A chassis for a non-highway mining dump truck, characterized in that, The off-highway mining dump truck frame is equipped with a tail beam as described in any one of claims 1 to 8.

10. A non-highway mining dump truck, characterized in that, The off-highway mining dump truck is equipped with a rear beam of the off-highway mining dump truck frame as described in any one of claims 1 to 8.

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