Integrated power assembly suspension system of off-highway dumper

Abstract

The utility model discloses an integrated power assembly suspension system of an off-highway dumper, which is horizontally arranged and comprises an engine suspension structure, a pair of first connecting pieces, a pair of second connecting pieces, a pair of third connecting pieces, a pair of fourth connecting pieces and a pair of fourth connecting pieces, and the first connecting pieces are symmetrically arranged on two sides of a central surface of an engine flywheel casing in the width direction of a power assembly; the left side and the right side of the front end of the engine are connected with the left frame and the right frame respectively; the gearbox suspension structure comprises a pair of second connecting pieces which are symmetrically arranged on the two sides of the center face of the engine flywheel shell in the width direction of the power assembly, and the left side and the right side of the rear end of the engine and the left side and the right side of the rear end of the gearbox are connected and then connected with the left frame and the right frame. The four-point type suspension system has excellent vibration damping performance, simultaneously avoids stress damage of a flywheel casing caused by insufficient support of a traditional four-point type suspension system on the premise of a large-torque power assembly, thoroughly solves the problem of difficulty in assembly and maintenance, and realizes that a power assembly system can still keep away from an upper wing surface of a frame in a limited frame space. And integrated hoisting and dismounting are completed.

Description

Technical Field

[0001] The utility model relates to the technical field of powertrain mounting systems. More specifically, the utility model relates to an integrated powertrain mounting system for off-road dump trucks. Background Art

[0002] The common layout methods of the powertrain mounting system for off-road dump trucks are three types: flat layout, inclined layout, and convergent layout. The flat layout is easy to arrange and control, but its disadvantage is poor lateral vibration isolation, which can be compensated by selecting shock absorbers. The inclined layout and the convergent layout can adjust the angle of the mounting points to compensate for the modes in all directions, but they have high requirements for the internal space of the frame, are difficult to arrange the position of the powertrain, and have poor assembly performance. Considering that the longitudinal excitation of the engine of general vehicles is small, they are often not used. The common point layout methods of the powertrain mounting system for off-road dump trucks are three-point layout, four-point layout, and five- or six-point layout. The three-point layout has low cost and simple assembly, and has better vibration isolation in the torsional direction of the powertrain than the four-point layout. However, only one point of the rear mount provides a reaction force, and the torque output that can be borne is small, so it is not suitable for off-road dump trucks with large powertrain torque and large load tonnage requirements. Although the five- or six-point layout has good support and high stability of the powertrain, it is an over-positioning, which makes the compliance between the gearbox and the engine worse and easily causes damage to the flywheel housing due to force.

[0003] In the existing flat-mounted powertrain mounting system, the four-point powertrain mounting system is mainly divided into the following two types: The first type is two front mounting points at the front end of the engine and two rear mounting points at the flywheel housing of the engine for connecting the rear end of the engine and the front end of the transmission. The second type is two front mounting points at the front end of the engine and two rear mounting points for connecting the rear end of the engine and the rear end of the transmission. The first four-point mounting has better stability but is more suitable for small transmissions. Once it is used for a large transmission, the center of mass of the transmission is at the rear, and this method provides insufficient support for the transmission, which is extremely likely to cause damage to the flywheel housing. At this time, it is necessary to install an auxiliary support for the transmission to become a five-point mounting or add two rear mounting points for the transmission to become a six-point mounting. Both improvement methods cause over-positioning of the powertrain and will also lead to damage to the flywheel housing. Compared with the first type, the second type avoids over-positioning of the powertrain and improves the vibration damping effect on the basis of ensuring the stability of the power mounting system, but there are still problems with difficult assembly. For example, when hoisting the powertrain, the distance between the left and right side frames is small and the upper wing surface protrudes, which will cause difficulties for the powertrain to drop. At this time, in order to avoid the difficulty of the powertrain dropping, the worker will first install the support on one side and then assemble the support on the other side when the powertrain falls into the frame, which is likely to cause difficulties in tightening the fastening bolts of the support, and it is difficult to ensure the tightening torque, ultimately affecting the safety and stability of the powertrain. In summary, neither of the two methods has completely solved the problems of the assembly and maintenance convenience of the engine and the transmission. When non-road mining dump trucks have a greater demand for transportation weight, due to the harsh open-pit mine environment with complex working conditions such as uphill, downhill, and sharp turns, it is crucial to improve the structural stability and assembly and maintenance convenience of the entire vehicle powertrain of overhanging heavy vehicles. Therefore, relevant matching is also required in terms of the power performance of the powertrain. An engine with a larger torque also puts forward higher requirements for the torque value that the transmission can transmit, which means that the outer dimensions of the engine and the transmission will be larger. Therefore, on the basis of considering factors such as economy and stability, it has become more difficult to hoist and maintain the powertrain on the original frame. Summary of the Invention

[0004] The utility model provides a non-road dump truck integrated powertrain mounting system, which has excellent vibration damping performance. At the same time, it avoids the damage of the flywheel housing caused by insufficient support of the traditional four-point mounting system under the premise of a large-torque powertrain, and completely solves the problems of difficult assembly and maintenance. It ensures the tightening torque of the fastening bolts on the support of the mounting system, and realizes that within the limited frame space, the powertrain system can still avoid the upper wing surface of the frame and complete integrated hoisting and disassembly, improving the structural stability and assembly and maintenance convenience of the entire vehicle powertrain of overhanging heavy vehicles.

[0005] To achieve these and other advantages in accordance with the present utility model, there is provided a non-road dump truck integrated powertrain mounting system, which adopts a flat-mounted layout and includes:

[0006] An engine mounting structure, which includes a pair of first connectors symmetrically arranged on both sides of the central plane of the engine flywheel housing in the width direction of the powertrain, and respectively connects the left and right sides at the front end of the engine to the left frame and the right frame.

[0007] A transmission mounting structure, which includes a pair of second connectors symmetrically arranged on both sides of the central plane of the engine flywheel housing in the width direction of the powertrain, and connects the left and right sides at the rear end of the engine and the left and right sides at the rear end of the transmission and then connects to the left frame and the right frame.

[0008] Preferably, a pair of first connectors includes a right front bracket and a left front bracket, and both the right front bracket and the left front bracket include:

[0009] A front support, which is connected to the engine, and the front support has a horizontally extending surface;

[0010] A front bracket, which is connected to the left frame or the right frame, and the front bracket has a horizontally extending surface;

[0011] A pair of shock absorbers, which are coaxially arranged and are perpendicularly connected to the horizontally extending surface of the front support and the horizontally extending surface of the front bracket.

[0012] Preferably, the way to realize the perpendicular connection of a pair of shock absorbers to the front support and the front bracket is: bolts sequentially pass through the through holes of the single-hole type shock absorber pressing plate, the through holes of the upper shock absorber, the through holes of the front support, the through holes of the lower shock absorber, the through holes of the front bracket and then are fixedly connected to nuts.

[0013] Preferably, a pair of second connectors includes a right rear bracket and a left rear bracket, and both the right rear bracket and the left rear bracket include:

[0014] A rear support, which is connected to the engine and the transmission at the same time, and the rear support has a horizontally extending surface;

[0015] A rear bracket, which is connected to the left frame or the right frame, and the rear bracket has a horizontally extending surface;

[0016] At least two pairs of shock absorbers, which are arranged adjacent to each other in the length direction of the powertrain, any pair of shock absorbers is coaxially arranged, and at least two pairs of shock absorbers are perpendicularly connected to the horizontally extending surface of the rear support and the horizontally extending surface of the rear bracket.

[0017] Preferably, the rear support includes a mounting base plate and a support plate, the mounting base plate is a long strip-shaped plate body with bends to be respectively connected to the engine and the transmission, the support plate is vertically welded to the mounting base plate, the support plate forms a horizontally extending surface, and the support plate has an open arc-shaped through hole.

[0018] Preferably, the implementation manner of the vertical connection of at least two pairs of shock absorbers to the rear support and the rear bracket is as follows: at least two bolts sequentially pass through the through holes of at least two single-hole shock absorber pressing plates, the through holes of at least two shock absorbers located above, at least two through holes of the multi-hole shock absorber gasket located above, at least two through holes of the rear support, at least two through holes of the multi-hole shock absorber gasket located below, the through holes of at least two shock absorbers located below, and at least two through holes of the rear bracket, and then are respectively fixedly connected to nuts.

[0019] Preferably, both the right rear bracket and the left rear bracket include two pairs of shock absorbers. The implementation manner of the vertical connection of the two pairs of shock absorbers to the rear support and the rear bracket is as follows: two bolts sequentially pass through the through holes of two single-hole shock absorber pressing plates, the through holes of two shock absorbers located above, two through holes of the double-hole shock absorber gasket located above, two through holes of the rear support, two through holes of the double-hole shock absorber gasket located below, the through holes of two shock absorbers located below, and two through holes of the rear bracket, and then are respectively fixedly connected to nuts.

[0020] The utility model has at least the following beneficial effects:

[0021] First, the off-road dump truck integrated powertrain mounting system of the utility model has excellent shock absorption performance. At the same time, it avoids the damage of the flywheel housing caused by the insufficient support of the traditional four-point mounting system under the premise of a large-torque powertrain, improves the compliance and shock absorption effect of the powertrain mounting system, completely solves the problems of difficult assembly and maintenance, ensures the tightening torque of the fastening bolts on the support of the mounting system, realizes that the powertrain system can still avoid the upper wing surface of the frame within the limited frame space, completes the integrated hoisting and disassembly, improves the structural stability, assembly and maintenance convenience of the whole vehicle powertrain of the over-width heavy vehicle, and reduces the vehicle manufacturing and maintenance costs.

[0022] Second, the engine is connected to the transmission. When the transmission becomes larger, in the limited frame space, the existing powertrain mounting system will be difficult to meet the assembly requirements and ensure the stability of the power system. In the present utility model, the engine mounting structure is arranged on the left and right sides at the front end of the engine. The engine mounting structure connects the engine to the right frame and the left frame respectively. The transmission mounting structure is arranged on the left and right sides at the rear end of the engine and the left and right sides at the rear end of the transmission. The transmission mounting structure connects the rear end of the engine and the rear end of the transmission, and is connected to the right frame and the left frame. A pair of first connectors and a pair of second connectors are symmetrically arranged with respect to the center plane of the engine flywheel housing, which improves the vibration absorption capacity of the mounting system. By adopting this setting method, the span of the front and rear mounting points in the transverse and longitudinal directions of the whole vehicle is increased on the premise of meeting the assembly convenience, effectively improving the torsional stiffness of the powertrain mounting structure, increasing the stability of the powertrain, and avoiding excessive stress at the engine flywheel housing.

[0023] Third, the right front bracket and the left front bracket are symmetrically arranged in terms of orientation, structure and shape with respect to the center plane of the engine flywheel housing, which plays a role in optimizing the vibration absorption capacity of the system. The left front bracket includes a front support connected to the engine and a front bracket for connecting to the left frame. The front support and the front bracket are vertically connected by a shock absorber. The front support is provided with a mounting bottom plate, which can be used to connect to engine A. The support plate is vertically welded on the mounting bottom plate. Through holes are provided on the support plate. When assembling, a single-hole shock absorber pressing piece is installed above the shock absorber located above. The right front bracket includes a front support connected to the engine and a front bracket for connecting to the right frame. The front support and the front bracket are vertically connected by a shock absorber. The shock absorber plays a shock absorption role. The shock absorber can be any one of a rubber shock absorber, a silicone oil shock absorber, and an air spring shock absorber. The vertical connection can be achieved by a detachable method on the same axis. The front support is connected to the engine by bolts. The front support and the front bracket are vertically connected by a pair of shock absorbers. The shock absorber is a cylindrical shape with a through hole in the center. When installing, bolts are sequentially passed through the through holes of the single-hole shock absorber pressing piece, the through holes of the shock absorber located above, the through holes of the front support, the through holes of the shock absorber located below, and the through holes of the front bracket for fixing, which improves the torsional stiffness, compliance and stability of the engine mounting structure, and is also convenient for installation and maintenance.

[0024] Fourth, the right rear bracket and the left rear bracket are symmetrically arranged with respect to the center plane of the engine flywheel housing in terms of orientation, structure and shape, which plays a role in optimizing the vibration absorption capacity of the system. The left rear bracket includes a rear support connected to the engine and the transmission and a rear bracket for connecting to the left side frame. The rear support and the rear bracket are vertically connected by at least two pairs of shock absorbers. The rear support is provided with a mounting base plate, which is a long strip-shaped plate body with bends, and mounting holes are provided at both ends. This structure can be used to solve the problem that the planes where the mounting points of the engine and the transmission are located are not coplanar in the length direction. The support plate is vertically welded to the mounting base plate. The two through holes provided on the support plate are open arc-shaped (required to be greater than or equal to 1 / 2 circle, such as 2 / 3 full circle). When assembling, a porous gasket should be installed above and below the support plate respectively, and then the corresponding shock absorber should be installed. This structure can be used to solve the problem that it is difficult to carry out the integrated lifting and disassembly of the engine and the transmission when the internal space of the right side frame and the left side frame is limited. This kind of structure has low cost and is beneficial to still meet the integrated lifting and disassembly of the powertrain when the size of the powertrain is large. The right rear bracket includes a rear support connected to the engine and the transmission and a rear bracket for connecting to the right side frame. The rear support and the rear bracket are vertically connected by at least two pairs of shock absorbers. The shock absorbers play a role in damping. The shock absorbers can be any one of rubber shock absorbers, silicone oil shock absorbers, and air spring shock absorbers. The vertical connection can be achieved by a detachable method on the same axis. The rear support is connected to the engine and the transmission by bolts. The rear support and the rear bracket are vertically connected by at least two pairs of shock absorbers. The shock absorbers are cylindrical with through holes in the center. When installing, bolts are used to pass through the through holes of the single-hole shock absorber pressing piece, the through holes of the shock absorber located above, the through holes of the double-hole shock absorber gasket located above, the through holes of the rear support, the through holes of the double-hole shock absorber gasket located below, the through holes of the shock absorber located below, and the through holes of the rear bracket in sequence for fixation, which improves the torsional stiffness, compliance and stability of the engine mounting structure and is also convenient for installation and maintenance. Considering the limitation of the support length due to assembly factors, on the premise of meeting the load-bearing analysis calculation, it is preferably that the rear support and the rear bracket are vertically connected by two pairs of shock absorbers.

[0025] Other advantages, objectives and features of the present utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a technical solution of the present utility model;

[0027] Figure 2 is a top view of a technical solution of the present utility model;

[0028] Figure 3 is a schematic structural diagram of a first connecting member of a technical solution of the present utility model;

[0029] Figure 4 Schematic diagram of the structure of the second connecting member of a technical solution of the present utility model;

[0030] Figure 5 Schematic diagram of the structure of the rear support of a technical solution of the present utility model. Detailed implementation manners

[0031] The following further describes the present utility model in detail with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0032] It should be understood that the terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0033] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the components and materials can be obtained from commercial channels unless otherwise specified; in the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "set" should be understood in a broad sense. For example, they can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply 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.

[0034] As Figure 1 、 2 shown, the present utility model provides a non-road dump truck integrated powertrain mounting system, which adopts a flat layout and includes:

[0035] An engine mounting structure, which includes a pair of first connecting members symmetrically arranged on both sides of the center plane of the flywheel housing of the engine 1 in the width direction of the powertrain, and respectively connects the left and right sides of the front end of the engine 1 to the left frame 11 and the right frame 10;

[0036] A transmission mounting structure, which includes a pair of second connecting members symmetrically arranged on both sides of the center plane of the flywheel housing of the engine 1 in the width direction of the powertrain, and connects the left and right sides of the rear end of the engine 1 and the left and right sides of the rear end of the transmission 4 and then connects them to the left frame 11 and the right frame 10.

[0037] In the above technical solution, a pair of first connectors and a pair of second connectors need to be fully assembled on the powertrain before the powertrain is hoisted. During the later maintenance of the whole vehicle, when the powertrain needs to be disassembled and hoisted, if the pair of first connectors and the pair of second connectors are not damaged, they will not be disassembled permanently, that is, an integrated powertrain mounting system is formed. The integrated powertrain mounting system of the off-highway dump truck has excellent vibration damping performance. At the same time, it avoids the damage of the flywheel housing caused by the insufficient support of the traditional four-point mounting system under the premise of a large-torque powertrain, and completely solves the problems of difficult assembly and maintenance. It ensures the tightening torque of the fastening bolts for the support of the mounting system, and realizes that within the limited frame space, the powertrain system can still avoid the upper wing surface of the frame, complete the integrated hoisting and disassembly, and improve the structural stability and assembly and maintenance convenience of the powertrain of the over-width heavy vehicle.

[0038] The engine 1 is connected to the transmission 4. When the transmission 4 becomes larger, within the limited frame space, the existing powertrain mounting system will be difficult to meet the assembly requirements and ensure the stability of the power system. In the present utility model, the engine mounting structures are arranged on the left and right sides at the front end of the engine 1. The engine mounting structures connect the engine 1 to the right frame 10 and the left frame 11 respectively. The transmission mounting structures are arranged on the left and right sides at the rear end of the engine 1 and the left and right sides at the rear end of the transmission 4. The transmission mounting structures connect the rear end of the engine 1 and the rear end of the transmission 4, and are connected to the right frame 10 and the left frame 11. A pair of first connectors and a pair of second connectors are symmetrically arranged with respect to the center plane of the engine flywheel housing, which improves the vibration absorption capacity of the mounting system. By adopting this setting method, the span of the front and rear mounting points in the transverse and longitudinal directions of the whole vehicle is increased on the premise of meeting the assembly convenience, effectively improving the torsional stiffness of the powertrain mounting structure, increasing the stability of the powertrain, and avoiding excessive stress at the engine flywheel housing. Figure 2 The powertrain in it is implicitly shown. The left side is a virtualized view of the frame, and the right side is a real view of the frame. It can be directly seen the influence of the upper wing surface on the powertrain assembly.

[0039] Such as Figure 3 shown, in another technical solution, a pair of first connectors includes a right front bracket and a left front bracket. The right front bracket and the left front bracket both include:

[0040] A front support 2, which is connected to the engine 1. The front support 2 has a horizontally extending surface;

[0041] A front bracket 3, which is connected to the left frame 11 or the right frame 10. The front bracket 3 has a horizontally extending surface;

[0042] A pair of shock absorbers 8 are coaxially arranged and perpendicularly connected to the horizontal extension surface of the front support 2 and the horizontal extension surface of the front bracket 3.

[0043] In the above technical solution, the right front bracket and the left front bracket are symmetrically arranged with respect to the center plane of the flywheel housing of the engine 1 in terms of orientation, structure and shape, which plays a role in optimizing the vibration absorption capacity of the system. The left front bracket includes a front support 2 connected to the engine 1 and a front bracket 3 for connecting to the left side frame 11. The front support 2 and the front bracket 3 are vertically connected by a shock absorber 8. The right front bracket includes a front support 2 connected to the engine 1 and a front bracket 3 for connecting to the right side frame 10. The front support 2 and the front bracket 3 are vertically connected by a shock absorber 8. The shock absorber 8 plays a role in shock absorption. The shock absorber 8 can be any one of a rubber shock absorber, a silicone oil shock absorber, and an air spring shock absorber. The vertical connection can be achieved in a detachable manner on the same axis.

[0044] In another technical solution, the implementation manner of the vertical connection between a pair of shock absorbers 8 and the front support 2 and the front bracket 3 is as follows: bolts sequentially pass through the through holes of the single-hole shock absorber pressing plate 6, the through holes of the upper shock absorber 8, the through holes of the front support 2, the through holes of the lower shock absorber 8, and the through holes of the front bracket 3 and are fixedly connected to nuts. The front support 2 is connected to the engine 1 by bolts. The front support 2 and the front bracket 3 are vertically connected by a pair of shock absorbers 8. The shock absorber 8 is a cylindrical shape with a through hole in the center. During installation, bolts sequentially pass through the through holes of the single-hole shock absorber pressing plate 6, the through holes of the upper shock absorber 8, the through holes of the front support 2, the through holes of the lower shock absorber 8, and the through holes of the front bracket 3 and are fixedly connected to nuts, which improves the torsional stiffness, compliance and stability of the engine 1 mounting structure and is also convenient for installation and maintenance.

[0045] As Figure 4 、 5 shown, in another technical solution, a pair of second connecting members includes a right rear bracket and a left rear bracket. The right rear bracket and the left rear bracket both include:

[0046] A rear support 5, which is simultaneously connected to the engine 1 and the transmission 4. The rear support 5 has a horizontal extension surface;

[0047] A rear bracket 9, which is connected to the left side frame 11 or the right side frame 10. The rear bracket 9 has a horizontal extension surface;

[0048] At least two pairs of shock absorbers 8, which are arranged adjacent to each other along the length direction of the powertrain. Any pair of shock absorbers 8 are coaxially arranged. At least two pairs of shock absorbers 8 are perpendicularly connected to the horizontal extension surface of the rear support 5 and the horizontal extension surface of the rear bracket 9.

[0049] In the above technical solution, the right rear bracket and the left rear bracket are symmetrically arranged with respect to the center plane of the flywheel housing of the engine 1 in terms of orientation, structure and shape, which plays a role in optimizing the vibration absorption capacity of the system. The left rear bracket includes a rear support 5 connected to the engine 1 and the transmission 4 and a rear bracket 9 for connecting to the left side frame 11. The rear support 5 and the rear bracket 9 are vertically connected by at least two pairs of shock absorbers 8. The right rear bracket includes a rear support 5 connected to the engine 1 and the transmission 4 and a rear bracket 9 for connecting to the right side frame 10. The rear support 5 and the rear bracket 9 are vertically connected by at least two pairs of shock absorbers 8. The shock absorbers 8 play a role in damping. The shock absorbers 8 can be any one of rubber shock absorbers, silicone oil shock absorbers, and air spring shock absorbers. The vertical connection can be achieved by a detachable manner on the same axis.

[0050] In another technical solution, the rear support 5 includes a mounting base plate and a support plate. The mounting base plate is a long strip-shaped plate body with bends to be respectively connected to the engine 1 and the transmission 4. The support plate is vertically welded to the mounting base plate. The support plate forms a horizontally extending surface. The support plate has an open arc-shaped through hole. The rear support 5 is provided with a mounting base plate, which is a long strip-shaped plate body with bends, and mounting holes are provided at both ends. This structure can be used to solve the problem that the planes where the mounting points of the engine 1 and the transmission 4 are located are not coplanar in the length direction. The support plate is vertically welded to the mounting base plate. The two through holes provided on the support plate are open arc-shaped (should be greater than or equal to 1 / 2 circle, such as 2 / 3 full circle). When assembling, a porous gasket should be installed above and below the support plate 5 respectively, and then the corresponding shock absorber 8 should be installed. This structure can be used to solve the problem that it is difficult to perform the integrated hoisting of the engine 1 and the transmission 4 when the internal space of the right side frame 10 and the left side frame 11 is limited. This kind of structure has low cost and is beneficial to still meeting the integrated hoisting and disassembly of the powertrain when the size of the powertrain is large.

[0051] In another technical solution, the implementation manner of the vertical connection of at least two pairs of shock absorbers 8 with the rear support 5 and the rear bracket 9 is as follows: at least two bolts sequentially pass through the through holes of at least two single-hole shock absorber press plates 6, the through holes of at least two upper shock absorbers 8, at least two through holes of the upper multi-hole shock absorber gasket 7, at least two through holes of the rear support 5, at least two through holes of the lower multi-hole shock absorber gasket 7, the through holes of at least two lower shock absorbers 8, and at least two through holes of the rear bracket 9 and are respectively fixedly connected with nuts. The rear support 5 is bolted to the engine 1 and the transmission 4. The rear support 5 and the rear bracket 9 are vertically connected by at least two pairs of shock absorbers 8. The shock absorbers 8 are cylindrical with a through hole in the center. During installation, bolts are sequentially passed through the through holes of the single-hole shock absorber press plate 6, the through holes of the upper shock absorber 8, the through holes of the upper multi-hole shock absorber gasket 7, the through holes of the rear support 5, the through holes of the lower multi-hole shock absorber gasket 7, the through holes of the lower shock absorber 8, and the through holes of the rear bracket 9 for fixation, which improves the torsional stiffness, compliance and stability of the powertrain and is also convenient for installation and maintenance.

[0052] In another technical solution, both the right rear bracket and the left rear bracket include two pairs of shock absorbers 8. The implementation manner of the vertical connection of the two pairs of shock absorbers 8 with the rear support 5 and the rear bracket 9 is as follows: two bolts sequentially pass through the through holes of two single-hole shock absorber press plates 6, the through holes of two upper shock absorbers 8, two through holes of the upper double-hole shock absorber 8 gasket, two through holes of the rear support 5, two through holes of the lower double-hole shock absorber gasket, the through holes of two lower shock absorbers 8, and two through holes of the rear bracket 9 and are respectively fixedly connected with nuts. Considering the limitation of the support length by the assembly factors, on the premise of meeting the load-bearing analysis calculation, it is preferably that the rear support 5 and the rear bracket 9 are vertically connected by two pairs of shock absorbers 8.

[0053] The utility model is applied to off-road dump trucks, avoiding the insufficient support of the traditional flat four-point suspension system, reducing the force on the flywheel housing of the engine 1, improving the compliance and shock absorption effect of the powertrain lifting suspension system, and completely solving the problem of difficult assembly and maintenance. It ensures the tightening torque of the fastening bolts on the support of the suspension system, and realizes that when the transmission 4 housing of the over-width heavy vehicle has a large size, within the limited frame space, the engine 1 and the transmission 4 can still avoid the upper wing surface of the frame, completing the integrated lifting and disassembly, reducing the cost and being beneficial to the assembly and maintenance of the engine 1 and the transmission 4.

[0054] The equipment quantities and processing scales described here are used to simplify the description of the utility model. The applications, modifications and variations of the utility model are obvious to those skilled in the art.

[0055] Although the embodiments of the present utility model have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrated examples herein.

Claims

1. The integrated powertrain suspension system of the off-road dump truck adopts a horizontal layout, which is characterized by: include: The engine suspension structure includes a pair of first connecting members symmetrically arranged on both sides of the center plane of the engine flywheel housing in the width direction of the power assembly, respectively connecting the left and right sides of the front end of the engine to the left frame and the right frame; The gearbox suspension structure includes a pair of second connecting members symmetrically arranged on both sides of the center plane of the engine flywheel housing in the width direction of the powertrain, which respectively connect the left and right sides of the rear end of the engine and the left and right sides of the rear end of the gearbox and then connect to the left frame and the right frame.

2. The off-highway dump truck integrated powertrain suspension system according to claim 1, characterized in that: A pair of first connecting members includes a right front bracket and a left front bracket, and the right front bracket and the left front bracket each include: A front support connected to the engine, the front support having a horizontally extending surface; A front bracket connected to the left side frame or the right side frame, wherein the front bracket has a horizontally extending surface; A pair of shock absorbers are coaxially arranged and vertically connected to the horizontally extending surface of the front support and the horizontally extending surface of the front bracket.

3. The off-highway dump truck integrated powertrain suspension system according to claim 2, characterized in that: The vertical connection between a pair of shock absorbers and the front support and the front bracket is realized by: bolts are sequentially passed through the through hole of the single-hole shock absorber pressure plate, the through hole of the shock absorber located above, the through hole of the front support, the through hole of the shock absorber located below, and the through hole of the front bracket, and then fixedly connected with nuts.

4. The off-highway dump truck integrated powertrain suspension system according to claim 1, characterized in that: A pair of second connecting members includes a right rear bracket and a left rear bracket, and the right rear bracket and the left rear bracket each include: A rear support, which is connected to the engine and the gearbox at the same time, and has a horizontal extension surface; A rear bracket connected to the left side frame or the right side frame, wherein the rear bracket has a horizontally extending surface; At least two pairs of shock absorbers are adjacently arranged along the length direction of the power assembly, any pair of shock absorbers are coaxially arranged, and at least two pairs of shock absorbers are vertically connected to the horizontal extension surface of the rear support and the horizontal extension surface of the rear bracket.

5. The off-highway dump truck integrated powertrain suspension system according to claim 4, characterized in that: The rear support includes a mounting base plate and a support plate. The mounting base plate is a long strip plate with a bend to be connected to the engine and the gearbox respectively. The support plate is vertically welded to the mounting base plate. The support plate forms a horizontal extension surface and has an open arc-shaped through hole.

6. The off-highway dump truck integrated powertrain suspension system according to claim 5, characterized in that: The vertical connection of at least two pairs of shock absorbers to the rear support and the rear bracket is realized as follows: at least two bolts are sequentially passed through the through holes of at least two single-hole shock absorber pressure plates, at least two through holes of the shock absorbers located above, at least two through holes of the porous shock absorber gasket located above, at least two through holes of the rear support, at least two through holes of the porous shock absorber gasket located below, at least two through holes of the shock absorbers located below, and at least two through holes of the rear bracket, and are then fixedly connected with nuts respectively.

7. The off-highway dump truck integrated powertrain suspension system according to claim 6, characterized in that: The right rear bracket and the left rear bracket each include two pairs of shock absorbers, and the vertical connection between the two pairs of shock absorbers and the rear support and the rear bracket is realized as follows: two bolts sequentially penetrate through the through holes of two single-hole shock absorber pressure plates, two through holes of the shock absorbers located above, two through holes of the double-hole shock absorber gasket located above, two through holes of the rear support, two through holes of the double-hole shock absorber gasket located below, two through holes of the shock absorbers located below, and two through holes of the rear bracket, and are then fixedly connected with nuts respectively.

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