Balanced suspension device, chassis and engineering vehicle

Abstract

The utility model discloses a balance suspension device, a chassis and an engineering vehicle. The balance suspension device comprises a balance beam, a suspension oil cylinder B, a suspension oil cylinder C, a suspension oil cylinder D and a balance energy storage air chamber. The middle area of the balance beam is hinged to the outer side face of the frame. The top of the suspension oil cylinder B is connected with one transverse end part of the balance beam, and the bottom of the suspension oil cylinder B is connected with the axle B; the top of the suspension oil cylinder C is connected with the other transverse end of the balance beam, the bottom of the suspension oil cylinder C is connected with the axle C, and under the action of the balance beam, the axle B and the axle C bear the same axle load; the top of the suspension oil cylinder D is connected with an oil cylinder support on the outer side face of the frame, and the bottom of the suspension oil cylinder D is connected with the axle D; the balance energy storage air chamber is connected with the suspension oil cylinder C and the suspension oil cylinder D through connecting pipes, so that the axle C and the axle D bear the same axle load, then the axle B, the axle C and the axle D bear the same axle load, and the situation that the axles, tires, a frame, a suspension system and the like are damaged due to the fact that the axle load of part of the axles is increased abnormally is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of balanced suspension device, belong to the technical field of mine dump truck. BACKGROUND

[0002] Mine dump truck is generally composed of 2 axle or 3 axle. The fewer axle, the easier control and ground contact, can better keep the uniformity of bridge load suffered by axle. When axle is 3 axle, steel plate spring, balance beam, balanced suspension oil cylinder are used, so that the bridge load suffered by the last two axles can be equal. Mine dump truck is non-road machine, the road surface is relatively pitted and pockety when running, and the road flatness is much worse than highway, when axle reaches 4 or more, the existing balanced suspension structure cannot make each axle tire and ground uniform contact, which will lead to uneven distribution of bridge load, and the stress of part axle will be abnormally increased, resulting in axle damage or damage of suspension structure and frame connected with axle. SUMMARY

[0003] To solve the problems in the prior art, the utility model provides a kind of balanced suspension device, can make four axle car and more axle car when driving on mine road, ensure that the bridge load suffered by each axle can be more uniform, avoid axle, tire, frame, suspension system etc. damage due to abnormal increase of part axle bridge load.

[0004] The utility model is implemented according to the following technical solutions:

[0005] In the first aspect, the utility model provides a kind of balanced suspension device, comprising:

[0006] Balance beam, the middle area is hinged with the outer side of frame;

[0007] Suspension oil cylinder B, the top is connected with one transverse end of the balance beam, and the bottom is connected with axle B;

[0008] Suspension oil cylinder C, the top is connected with another transverse end of the balance beam, and the bottom is connected with axle C, under the action of the balance beam, so that the bridge load suffered by axle B and axle C is same;

[0009] Suspension oil cylinder D, the top is connected with oil cylinder support on the outer side of frame, and the bottom is connected with axle D;

[0010] Balanced energy storage air chamber is connected with suspension oil cylinder C and suspension oil cylinder D respectively through connecting pipe, so that the bridge load suffered by axle C and axle D is same, and then the bridge load suffered by axle B, axle C and axle D is same.

[0011] In some embodiments, the balance beam is left-right symmetrical in whole, comprising a top plate, a bottom plate, side plates, a hinged sleeve and fixed supports; the top plate, the bottom plate and a pair of side plates opposite to each other are connected to form a box beam, and each of the two transverse ends of the box beam is fixed with a fixed support for connecting with a suspension cylinder; the center area of each of the two side plates is provided with a coaxially arranged center hole, and the hinged sleeve is embedded in the two center holes, and a hinged shaft on the frame is inserted into the hinged sleeve, so that the balance beam rotates circumferentially around the hinged shaft and is axially limited by a fastening assembly.

[0012] In some embodiments, the suspension cylinders B, C and D are the same in external structure and each consist of a cylinder and bearings at both ends of the cylinder; the bearings are provided with pin handles with threaded holes; the inside of the suspension cylinder B is filled with inert gas and oil; and the inside of each of the suspension cylinders C and D is filled with oil only.

[0013] In some embodiments, the inside of the balance energy storage air chamber is separated into an oil cavity and a gas cavity by a piston, the oil cavity of the balance energy storage air chamber is connected in communication with the oil cavities of the suspension cylinders C and D through connecting pipes, and the gas cavity of the balance energy storage air chamber is filled with inert gas to achieve the effect of buffering and shock absorption.

[0014] In the second aspect, the utility model provides a chassis, comprising:

[0015] The front frame and the rear frame hingedly connected therewith are each composed of two longitudinal beams arranged side by side at a predetermined interval in the same plane and a plurality of cross beams fixedly connected with the two longitudinal beams;

[0016] The axle A is connected with the corresponding cross beam on the front frame through an A-shaped frame;

[0017] The axles B, C and D are respectively connected with the corresponding cross beams on the rear frame through A-shaped frames;

[0018] The suspension cylinder A is symmetrically arranged on both sides of the front frame, with the top connected with the cylinder support on the outer side of the frame and the bottom connected with the axle A;

[0019] The balance suspension device described above is symmetrically arranged on both sides of the rear frame.

[0020] In the third aspect, the utility model provides an engineering vehicle, comprising:

[0021] The chassis described above;

[0022] The cab is installed on the front frame of the chassis;

[0023] The cargo box is installed on the rear frame of the chassis;

[0024] a lifting cylinder connected between the cargo box and the rear frame.

[0025] In a fourth aspect, the utility model provides a kind of balanced suspension device, comprising:

[0026] first balance beam, middle region is hinged with the outer side of frame;

[0027] suspension cylinder B, its top is connected with the transverse end of the first balance beam, bottom is connected with axle B;

[0028] suspension cylinder C, its top is connected with the other transverse end of the first balance beam, bottom is connected with axle C, under the action of the first balance beam, so that axle B and axle C are subjected to the same bridge load;

[0029] second balance beam, middle region is hinged with the outer side of frame located behind the first balance beam;

[0030] suspension cylinder D, its top is connected with the transverse end of the second balance beam, bottom is connected with axle D;

[0031] suspension cylinder E, its top is connected with the other transverse end of the second balance beam, bottom is connected with axle E, under the action of the second balance beam, so that axle D and axle E are subjected to the same bridge load;

[0032] balance energy storage air chamber, by connecting pipe respectively with suspension cylinder C and suspension cylinder D, so that axle C and axle D are subjected to the same bridge load, in turn so that axle B, axle C, axle D, axle E are subjected to the same bridge load.

[0033] In some embodiments, the first balance beam and the second balance beam are identical in structure, and are symmetrical in whole, comprising a top plate, a bottom plate, side plates, a hinge sleeve and a fixed support;The top plate, the bottom plate and a pair of mutually opposed side plates are connected to form a box beam, and each of the two transverse ends of the box beam is fixed with a fixed support for connecting with a suspension cylinder;The central regions of the two side plates are each provided with a coaxially arranged central hole, the hinge sleeve is embedded in the two central holes, and a hinge shaft on the frame is inserted into the hinge sleeve, so that the balance beam rotates circumferentially around the hinge shaft and is axially limited by a fastening assembly.

[0034] In some embodiments, the suspension cylinder B, the suspension cylinder C and the suspension cylinder D, and the suspension cylinder E are identical in external structure and each consist of a cylinder and bearings located at both ends of the cylinder;The bearings are provided with a pin handle with a threaded hole;The suspension cylinder B and the suspension cylinder E are filled with inert gas and oil inside;The suspension cylinder C and the suspension cylinder D are only filled with oil inside.

[0035] In some embodiments, the interior of the balance energy storage air chamber is separated into an oil cavity and a gas cavity by a piston, the oil cavity of the balance energy storage air chamber is connected with the oil cavity of the suspension oil cylinder C and the oil cavity of the suspension oil cylinder D respectively through connecting pipes, and the gas cavity of the balance energy storage air chamber is filled with inert gas, thereby playing a buffering and damping effect.

[0036] In a fifth aspect, the utility model provides a chassis, comprising:

[0037] The front frame and the rear frame hingedly connected therewith are both composed of two longitudinal beams arranged side by side at a predetermined interval in the same plane and a plurality of cross beams fixedly connected with the two longitudinal beams;

[0038] The axle A is connected with the corresponding cross beam on the front frame through an A-shaped frame;

[0039] The axle B, the axle C, the axle D and the axle E are respectively connected with the corresponding cross beam on the rear frame through an A-shaped frame;

[0040] The suspension oil cylinder A is symmetrically arranged on the two sides of the front frame, with the top connected with the oil cylinder support on the outer side of the frame and the bottom connected with the axle A;

[0041] The above-mentioned balance suspension device is symmetrically arranged on the two sides of the rear frame.

[0042] In a sixth aspect, the utility model provides an engineering vehicle, characterized by comprising:

[0043] The above-mentioned chassis;

[0044] The cab is installed on the front frame of the chassis;

[0045] The cargo box is installed on the rear frame of the chassis;

[0046] The lifting oil cylinder is connected between the cargo box and the rear frame.

[0047] Based on the application of the above technical scheme, the utility model has the beneficial effects compared with the prior art:

[0048] The utility model provides a balance suspension device, which can ensure that the bridge load borne by each axle is more uniform when a four-axle vehicle and more axle vehicles run on a mine road, and avoid damage of the axle, the tire, the frame and the suspension system due to abnormal increase of the bridge load of part of the axles. BRIEF DESCRIPTION OF DRAWINGS

[0049] The accompanying drawings, which are part of the present application, serve to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0050] In the drawings:

[0051] Figure 1 is a structure diagram of the three-axle mine dump truck according to the present application;

[0052] Figure 2 is a structure diagram of the four-axle mine dump truck according to the present application;

[0053] Figure 3 is a structure diagram a of the balance suspension device according to the present application;

[0054] Figure 4 is a structure diagram b of the balance suspension device according to the present application;

[0055] Figure 5 is a structure diagram c of the balance suspension device according to the present application;

[0056] Figure 6 is a structure diagram of the suspension oil cylinder according to the present application;

[0057] Figure 7 is a structure diagram of the balance energy storage air chamber according to the present application;

[0058] Figure 8 is a structure diagram of the balance beam according to the present application.

[0059] Mark explanation: 1, three-axle mine dump truck; 2, cab; 3, frame; 4, lifting oil cylinder; 5, cargo box; 6, axle; 7, tire; 11, four-axle mine dump truck; 12, axle A; 13, axle B; 14, axle C; 15, axle D; 21, balance suspension device; 31, suspension oil cylinder B; 32, balance beam; 33, suspension oil cylinder C; 34, rubber tube; 35, balance energy storage air chamber; 36, suspension oil cylinder D; 37, suspension oil cylinder support; 38, A-shaped frame; 41, cross pull rod; 42, hinged shaft; 43, oil cylinder support; 44, hinged head; 45, cross pull rod support; 51, bearing; 52, oil cylinder; 61, cylinder body; 62, piston; 63, high-pressure air cavity; 64, oil cavity; 65, oil cavity joint port; 66, low-pressure air cavity; 71, top plate; 72, hinged sleeve; 73, side plate; 74, fixed support; 75, bottom plate.

[0060] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0062] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0063] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] As shown in Figure 1 , Figure 2 , the three-axle mine dump truck 1 is composed of a cab 2, a frame 3, a lifting cylinder 4, a cargo box 5, an axle 6, a tire 7, etc. The cargo box 5 is used to load and transport materials, and the materials can be dumped to a designated location by the lifting cylinder 4. The four-axle mine dump truck 11 is arranged with four axles, i.e. axle A 12, axle B 13, axle C 14 and axle D 15, one more axle than the three-axle mine dump truck.

[0065] As shown in Figure 3 , Figure 4 , Figure 5As shown, a kind of balance suspension device 21, including balance beam 32, suspension cylinder B 31, suspension cylinder C 33, suspension cylinder D 36, balance energy storage air chamber 35, rubber tube 34.The middle of balance beam 32 is provided with a hinge point hole, for being hinged with the side of frame 3, and the two ends of balance beam 32 are connected with suspension cylinder B 31 and suspension cylinder C 33 respectively by bolt, and the other ends of the two suspension cylinders are connected with axle B 13 and axle C 14 respectively, and balance beam 32 can make axle B 13 and axle C 14 bear the same bridge load.The one end of suspension cylinder D 36 is connected with suspension cylinder support 37 on frame by bolt, and the other end is connected with axle D 15.The inside of balance energy storage air chamber 35 is separated into oil cavity 64, high-pressure gas cavity 63 and low-pressure gas cavity 66 by piston 62.Oil cavity 64 is connected with suspension cylinder C 33 and suspension cylinder D 36 by rubber tube 34, and the two pipes are communicated in oil cavity 64.Suspension cylinder C 33, suspension cylinder D 36 and oil cavity 64 in balance energy storage air chamber are filled with oil, and gas cavity is filled with inert gas.Suspension cylinder B 31 can be used as an independent individual of oil-gas suspension cylinder, and the internal oil-gas is not connected with the outside, and is used for supporting, damping and buffering.Suspension cylinder C 33 and suspension cylinder D 36 are communicated, so that the pressure is the same, and then axle C 14 and axle D 15 bear the same bridge load.Combined with the above balance beam 32, axle B 13, axle C 14 and axle D 15 bear the same bridge load.Similarly, two balance beams can be used to connect four suspension cylinders and axles, and the two suspension cylinders adjacent to the two balance beams can be connected with balance energy storage air chamber by rubber tube, so that the four axles bear the same bridge load.Similarly, multiple balance beams, balance energy storage air chambers and suspension cylinders can be used to make more axles bear the same bridge load.

[0066] The specific structure of the above balance beam is further described as follows.

[0067] As shown in the figure, Figure 8 Balance beam 32 includes top plate 71, bottom plate 75, side plate 73, hinge sleeve 72 and fixed support 74.Top plate 71, bottom plate 75 and side plate 73 form a box beam, hinge sleeve 72 is embedded in the middle hole of side plate 73, and fixed support 74 is placed at the two ends of balance beam 32, and they are connected by welding.2 fixed supports 74 are the same distance from hinge sleeve 72, so that the stress of the two ends of balance beam 32 is equal.Fixed support 74 is used to connect with suspension cylinder B 31 and suspension cylinder C 33, and hinge sleeve 72 is connected with hinge shaft 42 of frame 3, so that balance beam 32 can rotate freely around hinge shaft 42.

[0068] The specific structure of the above suspension cylinder is further described as follows.

[0069] As shown in the figure, Figure 6As shown, the suspension oil cylinder B includes an oil cylinder 52 and a bearing 51. The bearing 51 is fixed at both ends of the oil cylinder 52 and can be a joint bearing or a rubber bearing, which has a pin handle with bolt holes, and is connected to the fixed support 74 and the axle B 13 through bolts respectively. The oil cylinder 52 is basically the same as a conventional oil gas spring, which is filled with inert gas and oil inside for buffering and damping. The suspension oil cylinder C or the suspension oil cylinder D includes an oil cylinder 52 and a bearing 51. The bearing 51 is fixed at both ends of the oil cylinder 52 and can be a joint bearing or a rubber bearing, which has a pin handle with bolt holes, and is connected to the fixed support 74, the axle C 14 and the axle D 15 through bolts respectively. The oil cylinder 52 is slightly different from a conventional oil gas spring, which is filled with oil inside, but the inert gas is arranged in the balance energy storage air chamber 35.

[0070] The mounting mode of the axle described above is further described below.

[0071] As shown in the drawings, Figure 5 The oil cylinder support 43 is mounted at the rear end surface of each axle and connected to one end of the suspension oil cylinder through bolts. The front end surface of the axle is connected to the rear end surface of the A-shaped frame 38 through bolts, and the hinge joint part 44 of the A-shaped frame 38 is connected to the vehicle frame 3 to transmit driving force to the whole vehicle. The rear end surface of the axle is also provided with a wishbone support 45 connected to one end of the wishbone 41, and the other end of the wishbone 41 is connected to the vehicle frame 3 to limit the axle transversely relative to the whole vehicle.

[0072] The specific structure of the balance energy storage air chamber described above is further described below.

[0073] As shown in the drawings, Figure 7 The balance energy storage air chamber 35 includes a cylinder body 61 and a piston 62. The inside of the cylinder body 61 is divided into three spaces by two pistons 62. The middle part is an oil cavity 64 connected to the suspension oil cylinder through an oil cavity joint 65 formed on the cylinder body 61. The upper space is a low-pressure gas cavity 66 to improve the buffering and damping effect when the vehicle is empty. The lower space is a high-pressure gas cavity 63 to improve the buffering and damping effect when the vehicle is heavily loaded. The balance energy storage air chamber 35 is fixed to the longitudinal beam of the vehicle frame through bolts.

[0074] The chassis provided by the present application is described below, and the chassis described below can be correspondingly referred to the balance suspension device described above.

[0075] The utility model provides a chassis, including front frame, rear frame, axle A, axle B, axle C, axle D, suspension oil cylinder A and above-mentioned balanced suspension device, front frame and rear frame hinged with it are all by two longitudinal beams and a plurality of cross beams of fixed connection with two longitudinal beams are arranged side by side in the same plane with predetermined interval, axle A is connected with the corresponding cross beam on the front frame through an A type frame, axle B, axle C and axle D are connected with the corresponding cross beam on the rear frame through an A type frame respectively, suspension oil cylinder A is arranged on the both sides of front frame symmetrically, and its top is connected with the oil cylinder support on the outside of frame, and the bottom is connected with axle A, above-mentioned balanced suspension device is arranged on the both sides of rear frame symmetrically.

[0076] The beneficial effects achieved by the chassis provided by the utility model are consistent with the beneficial effects achieved by the balanced suspension device provided by the utility model, and thus will not be repeated here.

[0077] The engineering vehicle provided by the utility model is described as follows, and the engineering vehicle described below can be correspondingly referred to the chassis described above.

[0078] The utility model provides an engineering vehicle, including above-mentioned chassis, cab, cargo box and lifting oil cylinder, cab is installed on the front frame of chassis, cargo box is installed on the rear frame of chassis, and lifting oil cylinder is connected between cargo box and rear frame.

[0079] The beneficial effects achieved by the engineering vehicle provided by the utility model are consistent with the beneficial effects achieved by the chassis provided by the utility model, and thus will not be repeated here.

[0080] It should be noted that the above-mentioned engineering vehicle can be a mine dump truck.

[0081] The technical scheme of using two balance beams to connect four suspension oil cylinders and axles is further described as follows.

[0082] The utility model provides a kind of balanced suspension device, including first balance beam, suspension oil cylinder B, suspension oil cylinder C, second balance beam, suspension oil cylinder D, suspension oil cylinder E and balance energy storage air chamber;The middle region of first balance beam is hinged with the outer side of frame;The top of suspension oil cylinder B is connected with one transverse end of first balance beam, and bottom is connected with axle B;The top of suspension oil cylinder C is connected with another transverse end of first balance beam, and bottom is connected with axle C, under the action of first balance beam, so that axle B and axle C are subjected to same bridge load;The middle region of second balance beam is hinged with the outer side of frame located behind first balance beam;The top of suspension oil cylinder D is connected with one transverse end of second balance beam, and bottom is connected with axle D;The top of suspension oil cylinder E is connected with another transverse end of second balance beam, and bottom is connected with axle E, under the action of second balance beam, so that axle D and axle E are subjected to same bridge load;Balance energy storage air chamber is connected with suspension oil cylinder C and suspension oil cylinder D respectively by connecting pipe, so that axle C and axle D are subjected to same bridge load, and then axle B, axle C, axle D, axle E are subjected to same bridge load.

[0083] Further scheme, first balance beam and second balance beam are same in structure, consistent with the balance beam structure described above, and will not be described here.

[0084] Further scheme, suspension oil cylinder B, suspension oil cylinder C and suspension oil cylinder D, suspension oil cylinder E are same in external structure, and are all composed of oil cylinder and bearing located at both ends of oil cylinder;Bearing is equipped with pin handle with threaded hole;The inside of suspension oil cylinder B and suspension oil cylinder E is filled with inert gas and oil;The inside of suspension oil cylinder C and suspension oil cylinder D is only filled with oil.

[0085] Further scheme, the inside of balance energy storage air chamber is separated into oil cavity and gas cavity by piston, and the oil cavity of balance energy storage air chamber is connected with the oil cavity of suspension oil cylinder C and the oil cavity of suspension oil cylinder D respectively by connecting pipe, and the gas cavity of balance energy storage air chamber is filled with inert gas, to play buffering and damping effect.

[0086] Need to say, the balance energy storage air chamber here is consistent with the balance energy storage air chamber structure described above, and will not be described here.

[0087] The chassis provided by the utility model is described below, and the chassis described below can be correspondingly referred to the balanced suspension device described above.

[0088] The utility model provides a chassis, including front frame, rear frame, axle A, axle B, axle C, axle D, axle E, suspension oil cylinder A and above -mentioned balance suspension device, front frame and with rear frame hinged to it, both are by two longitudinal beams and a plurality of cross beams of fixed connection with two longitudinal beams in the same plane with predetermined interval and side arrangement, axle A is connected with the corresponding cross beam on the front frame through an A type frame, axle B, axle C, axle D and axle E are connected with the corresponding cross beam on the rear frame through an A type frame respectively, suspension oil cylinder A is arranged on the both sides of front frame symmetry, its top is connected with the oil cylinder support on the frame outside, bottom is connected with axle A, above -mentioned balance suspension device is arranged on the both sides of rear frame symmetry.

[0089] The beneficial effects achieved by the chassis provided by the utility model are consistent with the beneficial effects achieved by the balance suspension device provided by the utility model, and thus will not be repeated here.

[0090] The engineering vehicle provided by the utility model is described below, and the engineering vehicle described below can be correspondingly referred to the chassis described above.

[0091] The utility model provides an engineering vehicle, including above -mentioned chassis, cab, cargo box and lifting oil cylinder, cab installation is in the front frame of chassis, cargo box installation is in the rear frame of chassis, lifting oil cylinder is connected between cargo box and rear frame.

[0092] The beneficial effects achieved by the engineering vehicle provided by the utility model are consistent with the beneficial effects achieved by the chassis provided by the utility model, and thus will not be repeated here.

[0093] It should be noted that the above engineering vehicle can be a mine dump truck.

[0094] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the specification.

[0095] In addition, those skilled in the art can understand that although some embodiments described herein include certain features contained in other embodiments rather than other features, combinations of features of different embodiments also mean within the protection scope of the utility model and form different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0096] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make minor changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the present application.

Claims

1. A balanced suspension device, characterized in that The balance beam is hinged to the outer side of the frame at the middle region thereof; A suspension oil cylinder B is connected at the top thereof to one transverse end of the balance beam and at the bottom thereof to the axle B; A suspension oil cylinder C is connected at the top thereof to the other transverse end of the balance beam and at the bottom thereof to the axle C, so that the axle B and the axle C are subjected to the same bridge load under the action of the balance beam; A suspension oil cylinder D is connected at the top thereof to the oil cylinder support on the outer side of the frame and at the bottom thereof to the axle D; A balance energy storage air chamber is connected through connecting pipes to the suspension oil cylinder C and the suspension oil cylinder D respectively, so that the axle C and the axle D are subjected to the same bridge load, and further so that the axle B, the axle C and the axle D are subjected to the same bridge load.

2. The balance suspension device according to claim 1, characterized in that: The balance beam is of a left-right symmetrical structure and comprises a top plate, a bottom plate, side plates, a hinge sleeve and fixed supports; The top plate, the bottom plate and a pair of mutually opposite side plates are connected to form a box beam, and each of the two transverse ends of the box beam is fixed with a fixed support for connection with a suspension oil cylinder; The central regions of the two side plates are each provided with a coaxially arranged central hole, the hinge sleeve is embedded in the two central holes, a hinge shaft on the frame is inserted into the hinge sleeve, so that the balance beam rotates circumferentially around the hinge shaft and is axially limited by a fastening assembly.

3. The balance suspension device according to claim 1, characterized in that: The suspension oil cylinder B, the suspension oil cylinder C and the suspension oil cylinder D are of the same external structure and each comprise a cylinder and bearings at both ends of the cylinder, and the bearings are provided with pin handles with threaded holes; The interior of the suspension oil cylinder B is filled with inert gas and oil, and the interiors of the suspension oil cylinder C and the suspension oil cylinder D are filled only with oil.

4. The balance suspension device according to claim 1, characterized in that: The interior of the balance energy storage air chamber is separated by a piston into an oil cavity and a gas cavity, the oil cavity of the balance energy storage air chamber is connected through a connecting pipe to the oil cavity of the suspension oil cylinder C and the oil cavity of the suspension oil cylinder D respectively, and the gas cavity of the balance energy storage air chamber is filled with inert gas, thereby achieving the effect of buffering and shock absorption. The front frame and the rear frame hinged thereto are each composed of two longitudinal beams arranged side by side at a predetermined interval in the same plane and a plurality of cross beams fixedly connected to the two longitudinal beams; 5. A pan characterized by, The axle A is connected through an A-shaped frame to the corresponding cross beam on the front frame; The axle B, the axle C and the axle D are respectively connected through an A-shaped frame to the corresponding cross beam on the rear frame; The suspension oil cylinder A is symmetrically arranged on both sides of the front frame, connected at the top thereof to the oil cylinder support on the outer side of the frame and connected at the bottom thereof to the axle A; The balance suspension device according to any one of claims 1 to 4 is symmetrically arranged on both sides of the rear frame. The chassis according to claim 5; The cab is mounted on the front frame of the chassis; 6. An engineering vehicle characterized by, The cargo box is mounted on the rear frame of the chassis; The lifting oil cylinder is connected between the cargo box and the rear frame. The first balance beam is hinged to the outer side of the frame at the middle region thereof; ​ ​ 7. A roll suspension device, characterized by ​ ​ a suspension oil cylinder B, the top of which is connected with one transverse end of the first balance beam, and the bottom of which is connected with the axle B; a suspension oil cylinder C, the top of which is connected with the other transverse end of the first balance beam, and the bottom of which is connected with the axle C, under the action of the first balance beam, the axle B and the axle C bear the same bridge load; a second balance beam, the middle region of which is hinged with the outer side of the frame behind the first balance beam; a suspension oil cylinder D, the top of which is connected with one transverse end of the second balance beam, and the bottom of which is connected with the axle D; a suspension oil cylinder E, the top of which is connected with the other transverse end of the second balance beam, and the bottom of which is connected with the axle E, under the action of the second balance beam, the axle D and the axle E bear the same bridge load; a balance energy storage air chamber, which is connected with the suspension oil cylinder C and the suspension oil cylinder D through connecting pipes, so that the axle C and the axle D bear the same bridge load, and further, the axle B, the axle C, the axle D and the axle E bear the same bridge load.

8. The balance suspension device according to claim 7, wherein: the first balance beam and the second balance beam have the same structure and are symmetrical in whole, comprising a top plate, a bottom plate, a side plate, a hinged sleeve and a fixed support; the top plate, the bottom plate and a pair of side plates opposite to each other are connected to form a box beam, and each of the two transverse ends of the box beam is fixed with a fixed support for connecting with a suspension oil cylinder; the center region of each of the two side plates is provided with a coaxially arranged center hole, the hinged sleeve is embedded in the two center holes, a hinged shaft on the frame is inserted into the hinged sleeve, so that the balance beam rotates circumferentially around the hinged shaft, and the balance beam is axially limited by a fastening assembly.

9. The balance suspension device according to claim 7, wherein: the suspension oil cylinder B, the suspension oil cylinder C, the suspension oil cylinder D and the suspension oil cylinder E have the same external structure and each comprise a cylinder and bearings arranged at both ends of the cylinder, and the bearings are provided with a pin handle with a threaded hole; the suspension oil cylinder B and the suspension oil cylinder E are filled with inert gas and oil, and the suspension oil cylinder C and the suspension oil cylinder D are filled with oil only.

10. The balance suspension device according to claim 7, wherein: the inside of the balance energy storage air chamber is separated into an oil cavity and a gas cavity by a piston, the oil cavity of the balance energy storage air chamber is connected with the oil cavity of the suspension oil cylinder C and the oil cavity of the suspension oil cylinder D through connecting pipes, and the gas cavity of the balance energy storage air chamber is filled with inert gas, which has a buffering and damping effect.

11. A pan characterized by, comprising: a front frame and a rear frame hinged therewith, each of which comprises two longitudinal beams arranged side by side at a predetermined interval in the same plane and a plurality of cross beams fixedly connected with the two longitudinal beams; an axle A connected with a corresponding cross beam on the front frame through an A-shaped frame; axles B, C, D and E connected with corresponding cross beams on the rear frame through A-shaped frames respectively; a suspension oil cylinder A symmetrically arranged on both sides of the front frame, the top of which is connected with an oil cylinder support on the outer side of the frame, and the bottom of which is connected with the axle A; The balance suspension device of any one of claims 7 to 10, symmetrically arranged on both sides of the rear frame.

12. An engineering vehicle characterized by, comprising: The chassis of claim 11; The cab mounted on the front frame of the chassis; The cargo box mounted on the rear frame of the chassis; The lifting cylinder connected between the cargo box and the rear frame.

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