Suspension of mining dump truck and mining dump truck

Abstract

The embodiment of the invention provides a suspension of a mining dump truck. The suspension of the mining dump truck comprises a side frame and a side frame, wherein the side frame comprises two longitudinal beams which are oppositely arranged; the first cross beam is connected between the two longitudinal beams, and the first cross beam is a box-shaped beam; the first axle housing is arranged on one side of the first cross beam; the two first suspension cylinders are connected between the first cross beam and the first axle housing, the first cross beam is hinged to the first axle housing through the first suspension cylinders, and the two first suspension cylinders are connected to the two ends of the first cross beam respectively. According to the suspension of the mining dump truck, through the box-shaped structure of the first cross beam and the arrangement of the two first suspension cylinders, the strength and stress stability of the first cross beam can be improved, the first cross beam can be prevented from being broken, and then the reliability and safety of the mining dump truck are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mining trucks, and particularly relates to a mining dump truck suspension and a mining dump truck. BACKGROUND

[0002] The mining dump truck is widely used in open-pit mines, and the suspension is an important component of the mining dump truck. Since the road conditions are relatively poor compared with highway trucks, and the mining dump truck is continuously operated for 24 hours, the strength requirement of the suspension is relatively high. The cross beam of the traditional suspension is connected to the side frame, and the connection with the axle housing is realized through the cross beam. The cross beam in the prior art is generally made by forging process. Since the forging manufacturing cost is high, and the middle section of the cross beam is not easy to be made into a complex shape, the cross beam is not good at force bearing and is unstable in force bearing, which is easy to cause cracking. Moreover, since the road conditions are relatively poor compared with highway trucks, the weight of the axle housing of the mining dump truck is transmitted to the cross beam, and with the road bumping in the running process, the cracking is more likely to occur in a long time operation. This not only affects the reliability and safety of the vehicle, but also increases the maintenance cost and time. In a serious case, the fracture of the cross beam can cause vehicle failure or even accidents, which threatens the normal operation and service life of the vehicle.

[0003] Therefore, how to improve the strength of the cross beam and prevent the cross beam from being broken becomes a technical problem to be solved urgently. SUMMARY

[0004] Therefore, in order to overcome at least part of the defects and deficiencies in the prior art, the present application provides a mining dump truck suspension and a mining dump truck.

[0005] Specifically, in one aspect, the present application provides a mining dump truck suspension, comprising: a side frame comprising two longitudinal beams arranged oppositely; a first cross beam connected between the two longitudinal beams, and the first cross beam is a box beam; a first axle housing arranged on one side of the first cross beam; two first suspension cylinders connected between the first cross beam and the first axle housing, the first cross beam and the first axle housing are hinged through the first suspension cylinders, and the two first suspension cylinders are respectively connected to the two ends of the first cross beam.

[0006] In one specific embodiment of the present application, the first cross beam is a hollow structure, and the cross section of the first cross beam is a hollow rectangle.

[0007] In one specific embodiment of the present application, the first cross beam comprises a box body part and connecting supports located at the two ends of the box body part, the first suspension cylinders are hinged on the connecting supports, the box body part comprises an upper wing plate and first side wing plates located at the two ends, the upper wing plate is an integral structure, the two ends of the upper wing plate have two connecting parts which are longer than the first side wing plates, and the connecting supports are welded on the connecting parts and the first side wing plates.

[0008] In one specific embodiment of the present application, the box body further comprises a lower wing plate arranged opposite to the upper wing plate, and two second side wing plates arranged between the upper wing plate and the lower wing plate, the upper wing plate, the lower wing plate, the two first side wing plates and the two second side wing plates are welded to form a hollow box structure.

[0009] In one specific embodiment of the present application, the first axle housing comprises a middle housing and end housings arranged at both ends of the middle housing, the middle housing and the end housings have traction motor accommodating positions for connecting traction motors between the middle housing and the end housings through connecting flanges.

[0010] In one specific embodiment of the present application, the middle housing has an inner cavity, and two heat dissipation air inlets and a heat dissipation air outlet respectively communicating with the inner cavity; the mine dump truck suspension further comprises a stabilizer, the stabilizer comprises opposite axle housing connecting ends and frame connecting ends, the axle housing connecting ends are fixedly connected to the middle housing, the frame connecting ends are hingedly connected to the side frames, the axle housing connecting ends are formed with first connecting air inlets, the axle housing connecting ends are fixedly connected to the first axle housing through the first connecting air inlets and the heat dissipation air inlets; the stabilizer is further formed with second connecting air inlets, and an air duct communicating between the first connecting air inlets and the second connecting air inlets; and a fan mounting seat fixed to the stabilizer; wherein the heat dissipation air inlets communicate with the heat dissipation air outlet through first through holes between the connecting flanges and the traction motors and internal clearances of rotors of the traction motors.

[0011] In one specific embodiment of the present application, the stabilizer comprises two inclined arms and a connecting arm connected between the two inclined arms, one end of each of the two inclined arms is hingedly connected to the side frame, and the other end is connected to the heat dissipation air inlet, each of the two inclined arms is formed with a first sub-air duct, the two heat dissipation air inlets are arranged in the axial direction of the first axle housing, the connecting arm is formed with a second sub-air duct communicating with the first sub-air duct, and the second connecting air inlet is arranged on the connecting arm.

[0012] In one specific embodiment of the present application, the side frame comprises two oppositely arranged longitudinal beams, the longitudinal beam comprises a first sub-longitudinal beam and a second sub-longitudinal beam, and the first cross beam is fixedly connected between the first sub-longitudinal beam and the second sub-longitudinal beam.

[0013] In a specific embodiment of the present application, the longitudinal beam further comprises a third sub-longitudinal beam; the mine dump truck suspension further comprises: a second cross beam connected between the two longitudinal beams, and the second cross beam is fixedly connected between the second sub-longitudinal beam and the third sub-longitudinal beam; a second axle housing arranged on one side of the second cross beam; and two second suspension cylinders connected between the second cross beam and the second axle housing, the second cross beam is hinged with the second axle housing through the second suspension cylinders, and the two second suspension cylinders are respectively connected to the two ends of the second cross beam; wherein the two first suspension cylinders and the two second suspension cylinders are connected through an energy accumulator.

[0014] In another aspect, the embodiments of the present application also provide a mine dump truck, comprising: the mine dump truck suspension as described above; and a traction motor arranged in the first axle housing.

[0015] As can be seen from the above, the mine dump truck suspension provided by the embodiments of the present application is provided with a side frame, a first cross beam, a first axle housing and two first suspension cylinders, the side frame comprises two opposite longitudinal beams, the first cross beam is connected between the two longitudinal beams, and the two first suspension cylinders are connected between the first axle housing and the first cross beam. By arranging the first cross beam as a box beam, the stress stability of the first cross beam can be improved, and by arranging the two first suspension cylinders, the jolt of the mine dump truck during operation can be reduced, so as to further reduce the stress of the first cross beam. Therefore, by arranging the box structure of the first cross beam and the two first suspension cylinders, the strength and stress stability of the first cross beam can be increased, the first cross beam can be prevented from being broken, and thus the reliability and safety of the mine dump truck can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The three-dimensional structure schematic diagram of the mine dump truck provided by the embodiments of the present application.

[0018] Figure 2 The three-dimensional structure schematic diagram of the mine dump truck suspension provided by the embodiments of the present application.

[0019] Figure 3 The three-dimensional structure schematic diagram of the first cross beam provided by the embodiments of the present application. Figure 2 The three-dimensional structure schematic diagram of the first cross beam provided by the embodiments of the present application.

[0020] Figure 4 The three-dimensional structure schematic diagram of the first cross beam provided by the embodiments of the present application. Figure 2 The three-dimensional structure schematic diagram of the first cross beam provided by the embodiments of the present application.

[0021] Figure 5 For Figure 3 A cross-sectional structure diagram of the first cross beam.

[0022] Figure 6 For Figure 3 Another cross-sectional structure diagram of the first cross beam.

[0023] Figure 7 A partial three-dimensional structure diagram of a mine dump truck provided by an embodiment of the present application.

[0024] Figure 8 For Figure 2 A three-dimensional structure diagram of the middle traction connecting seat.

[0025] Figure 9 Another partial three-dimensional structure diagram of a mine dump truck provided by an embodiment of the present application.

[0026] Figure 10 For Figure 9 An exploded structure diagram of a partial structure of the mine dump truck.

[0027] Figure 11 For Figure 9 An exploded structure diagram of another partial structure of the mine dump truck.

[0028] Figure 12 For Figure 7 An exploded structure diagram of the stabilizer.

[0029] Figure 13 A partial cross-sectional diagram of a drive axle of a mine dump truck provided by an embodiment of the present application.

[0030] Figure 14 For Figure 13 A partial enlarged view of the region A.

[0031] Main element label:

[0032] 1, mine dump truck;

[0033] 10, mine dump truck suspension; 20, traction motor; 21, rotor; 22, stator; 201, first via hole; 202, wind hole; 30, wheel; 40, carriage;

[0034] 100, side frame; 110, longitudinal beam; 111, first sub longitudinal beam; 112, second sub longitudinal beam; 113, third sub longitudinal beam; 120, towing seat; 121, towing connecting plate; 122, towing cross beam; 123, lifting cross beam; 210, first cross beam; 211, box main body part; 2111, upper wing plate; 21111, connecting part; 2112, first side wing plate; 2113, lower wing plate; 2114, second side wing plate; 2115, reinforcing rib; 212, connecting support; 2121, connecting support plate; 220, second cross beam; 301, heat dissipation air inlet; 302, heat dissipation air outlet; 310, first axle housing; 311, middle housing; 3111, inner cavity; 3112, protruding part; 312, end housing; 313, connecting flange; 314, speed reducer; 320, second axle housing; 410, first suspension cylinder; 420, second suspension cylinder; 510, stabilizer; 501, axle housing connecting end; 502, frame connecting end; 503, air duct; 511, first connecting air inlet; 512, second connecting air inlet; 513, inclined arm; 5131, first sub air duct; 514, connecting arm; 5141, second sub air duct; 520, fan mounting seat; 530, fan. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, but not all embodiments of the present application. Based on the embodiments described in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0036] It should be noted that all directionality indications (such as up, down, left, right, front, back, top, bottom) in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly. In addition, the term "perpendicular" referred to in the embodiments of the present application and the claims refers to an included angle of 90° or a deviation of -5° to +5° between two elements, and the term "parallel" refers to an included angle of 0° or a deviation of -5° to +5° between two elements.

[0037] In the embodiments of the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features.

[0038] Reference Figure 1The embodiment of the present application provides a mine dump truck 1 and a mine dump truck suspension 10. The mine dump truck 1 comprises the mine dump truck suspension 10, and further comprises a traction motor 20, a wheel 30 and a carriage 40, which can be understood with reference to conventional traction motors, wheels and carriages.

[0039] Referring to Figure 2 The embodiment of the present application provides the mine dump truck suspension 10 comprising a side frame 100, a first cross beam 210, a first axle housing 310 and two first suspension cylinders 410. In other embodiments, the mine dump truck suspension 10 may, for example, further comprise a second cross beam 220, a second axle housing 320 and two second suspension cylinders 420, the structure of the second cross beam 220 may, for example, be the same as that of the first cross beam 210, the structure of the second axle housing 320 may, for example, be the same as that of the first axle housing 310, and the structure of the second suspension cylinder 420 may, for example, be the same as that of the first suspension cylinder 410.

[0040] The side frame 100 comprises two oppositely arranged longitudinal beams 110, the first cross beam 210 is connected between the two longitudinal beams 110, and the first cross beam 210 is a box beam. The first axle housing 310 is arranged on one side of the first cross beam 210, the two first suspension cylinders 410 are connected between the first cross beam 210 and the first axle housing 310, the first cross beam 210 and the first axle housing 310 are hinged through the first suspension cylinders 410, and the two first suspension cylinders 410 are respectively connected to two ends of the first cross beam 210. Due to the working environment of the mine dump truck 1, the road surface may cause bumps during work. The two first suspension cylinders 410 can reduce the bumps. By arranging the first cross beam 210 as a box beam, the strength of the first cross beam 210 can be increased, the stress is more stable, and the fracture of the first cross beam 210 can be avoided.

[0041] The mine dump truck suspension 10 provided by the embodiment of the present application comprises the side frame 100, the first cross beam 210, the first axle housing 310 and the two first suspension cylinders 410. The side frame 100 comprises two oppositely arranged longitudinal beams 110, the first cross beam 210 is connected between the two longitudinal beams 110, and the two first suspension cylinders 410 are connected between the first cross beam 210 and the first axle housing 310. By arranging the first cross beam 210 as a box beam, the stress stability of the first cross beam 210 can be improved. The two first suspension cylinders 410 can reduce the bumps of the mine dump truck 1 during operation, thereby further reducing the stress of the first cross beam 210. Therefore, by arranging the box structure of the first cross beam 210 and the two first suspension cylinders 410, the strength and stress stability of the first cross beam 210 can be increased, the fracture of the first cross beam 210 can be prevented, and the reliability and safety of the mine dump truck 1 can be improved.

[0042] Further, the first cross beam 210 is hollow inside, and the cross section of the first cross beam 210 is a hollow rectangle. By such an arrangement, the stress stability of the first cross beam 210 can be improved. See Figure 3 and Figure 4 In one embodiment of the present embodiment, the first cross beam 210 may, for example, include a box body part 211 and two connecting supports 212, the two connecting supports 212 being located at two ends of the box body part 211, and the first suspension cylinder 410 being hinged to the connecting supports 212. The box body part 211 includes an upper wing plate 2111 and first side wing plates 2112 at two ends, and the upper wing plate 2111 is of an integral molding structure. By arranging the upper wing plate 2111 as an integral molding structure, the stress stability and strength can be further improved. Further, the upper wing plate 2111 has two connecting parts 21111 at two ends, which are beyond the first side wing plates 2112, and the connecting supports 212 are welded to the connecting parts 21111 and the first side wing plates 2112. By such an arrangement, the connecting strength and stress stability between the box body part 211 and the connecting supports 212 can be improved, and the structure is simple.

[0043] Further, the box body part 211 further includes a lower wing plate 2113 and second side wing plates 2114, the upper wing plate 2111 and the lower wing plate 2113 being oppositely arranged, the two first side wing plates 2112 being oppositely arranged, and the two second side wing plates 2114 being oppositely arranged, and the upper wing plate 2111, the lower wing plate 2113, the two first side wing plates 2112 and the two second side wing plates 2114 are welded to form a hollow box structure. By such an arrangement, the first cross beam 210 can be made into a box structure or other complex shape, and the manufacturing cost can be reduced.

[0044] Further, see Figure 5 The first side wing plate 2112 may, for example, be a box structure, and a reinforcing rib 2115 is further arranged in the first side wing plate 2112, the reinforcing rib 2115 extending along the length direction of the first cross beam 210. The connecting support 212 includes two connecting support plates 2121 oppositely arranged along the width direction of the first cross beam 210, the reinforcing rib 2115 and the connecting support plates 2121 being flush in position, so that the connecting stability between the connecting support 212 and the box body part 211 can be further improved, and the stress stability and stress strength of the first cross beam 210 can be improved. In one embodiment of the present embodiment, see Figure 6 The width of the first side wing plate 2112 may, for example, be greater than the width between the two second side wing plates 2114, and the second side wing plates 2114 extend into the first side wing plate 2112, the positions of the two second side wing plates 2114 being flush with the two connecting support plates 2121, so that the connecting stability between the connecting support 212 and the box body part 211 can be further improved, and the stress stability and stress strength of the first cross beam 210 can be improved.

[0045] Further referring to Figure 2 , the longitudinal beam 110 may, for example, include a first sub-longitudinal beam 111 and a second sub-longitudinal beam 112, the first transverse beam 210 is fixedly connected between the first sub-longitudinal beam 111 and the second sub-longitudinal beam 112, and the first transverse beam 210 may, for example, be fixedly connected between the first sub-longitudinal beam 111 and the second sub-longitudinal beam 112 by means of screws or welding, etc. In other embodiments, the longitudinal beam 110 may, for example, further include a third sub-longitudinal beam 113, the second transverse beam 220 is connected between two longitudinal beams 110, and the second transverse beam 220 is fixedly connected between the second sub-longitudinal beam 112 and the third sub-longitudinal beam 113, the second axle housing 320 is arranged on one side of the second transverse beam 220, two second suspension cylinders 420 are connected between the second transverse beam 220 and the second axle housing 320, and the two second suspension cylinders 420 are respectively connected to the two ends of the second transverse beam 220. Among them, the two first suspension cylinders 410 and the two second suspension cylinders 420 are connected through an energy accumulator, through a pressure compensation oil and gas suspension system (through a high-pressure energy accumulator, a low-pressure processor, and a special way to connect the two first suspension cylinders 410 and the two second suspension cylinders 420), while ensuring vertical compliance, enhancing lateral and longitudinal rigidity, thereby improving the stability, anti-tilting / tilting ability and axle load balance of the mining dump truck 1.

[0046] Referring to Figures 7 to 10 , the first axle housing 310 may, for example, include a middle housing 311 and end housings 312 located at both ends of the middle housing 311 in the axial direction, and the middle housing 311 and the end housings 312 have a traction motor accommodating position for connecting the traction motor 20 between the middle housing 311 and the end housings 312 through a connecting flange 313. The first axle housing 310 may, for example, accommodate two traction motors 20, and the wheels 30 may be mounted on the first axle housing 310, and the traction motor 20 is used to drive the wheels 30. The end housing 312 away from the middle housing 311 may, for example, also be provided with a speed reducer 314, of course, the present embodiment is not limited thereto. By arranging the first axle housing 310 as the middle housing 311 and the two end housings 312, the installation and fixation of the traction motor 20 can be facilitated, and space can be saved.

[0047] Further referring to Figure 9 and Figure 10 , the middle housing 311 may, for example, have an inner cavity 3111, and two heat dissipation air inlets 301 and a heat dissipation air outlet 302 in communication with the inner cavity 3111, and part of the traction motor 20 may, for example, be located in the inner cavity 3111. Further referring to Figure 7 , Figure 11 and Figure 12The suspension 10 of the mine dump truck 1 may, for example, further comprise a stabilizer 510 and a fan mounting seat 520 fixed to the stabilizer 510, and the fan mounting seat 520 is used to fixedly mount a fan 530. The stabilizer 510 comprises opposite axle housing connecting ends 501 and frame connecting ends 502, the axle housing connecting ends 501 are fixedly connected to the middle housing 311, and the frame connecting ends 502 are hingedly connected to the side frame 100. Referring to Figure 8 The side frame 100 may, for example, further be connected with a traction seat 120, the traction seat 120 comprises two opposite traction connecting plates 121, a traction cross beam 122 and a lifting cross beam 123 are connected between the two traction connecting plates 121, the frame connecting ends 502 are hingedly connected to the traction cross beam 122, and the frame connecting ends 502 of the stabilizer 510 rotate with the up-down movement of the first axle housing 310, further improving the stability of the vehicle. The axle housing connecting ends 501 are formed with first connecting air inlets 511, and the axle housing connecting ends 501 are fixedly connected to the first axle housing 310 by connecting the first connecting air inlets 511 with the heat dissipation air inlets 301. The stabilizer 510 is further formed with second connecting air inlets 512, and an air duct 503 is connected between the first connecting air inlets 511 and the second connecting air inlets 512. Referring to Figure 13 and Figure 14 The heat dissipation air inlets 301 are communicated with the heat dissipation air outlets 302 through the first through holes 201 between the connecting flanges 313 and the traction motor 20 and the internal gap of the rotor 21 of the traction motor 20. When the traction motor 20 works, the fan 530 can be started, the air generated by the fan 530 enters the air duct 503 through the second connecting air inlets 512, enters the heat dissipation air inlets 301 through the first connecting air inlets 511, and is blown out from the heat dissipation air outlets 302 through the first through holes 201 between the connecting flanges 313 and the traction motor 20 and the internal gap of the rotor 21 of the traction motor 20, thereby realizing the heat dissipation and cooling of the traction motor 20, having high integration and saving space without additional air pipes. The fan 530 is fixedly connected to the stabilizer 510, and the fan 530 moves with the stabilizer 510 when the mine dump truck 1 generates wheel jump, and there is no relative movement between the two, so that a connecting hose is not needed, and the fatigue damage of the hose caused by reciprocating movement can also be avoided. Moreover, as described in the foregoing embodiments, when the mine dump truck 1 comprises the first axle housing 310 and the second axle housing 320, an independent fan 530 can be arranged on the stabilizer 510 of each axle housing with a traction motor 20 to perform cooling. Compared with the traditional centralized cooling air source, on the one hand, the air pipes between the centralized cooling air source and each axle housing are saved, and on the other hand, the fan 530 on each axle housing can independently send air, so that the air volume delivered by the corresponding fan 530 can be adjusted according to the working condition of the traction motor 20 in the different axle housings, the air volume can be better distributed compared with the centralized cooling air source, the energy consumption can be guaranteed to be lower, and the waste of energy can be prevented.

[0048] Further, referring again toFigure 12 The stabilizing frame 510 may, for example, include two inclined arms 513 and a connecting arm 514 connected between the two inclined arms 513, one end of the two inclined arms 513 being hinged to the side frame 100 and the other end being connected to the heat dissipation air inlet 301. In this embodiment, the stabilizing frame 510 may, for example, be an A-frame, which has higher stability and reliability in terms of torque transmission, the two inclined arms 513 can bear forces in different directions respectively, which can reduce stress concentration and the possibility of structural fatigue damage, and ensure the service life. First sub-air ducts 5131 are respectively formed in the two inclined arms 513, the two traction motors 20 are arranged in the axial direction of the first axle housing 310 with a spacing, and the two heat dissipation air inlets 301 are arranged in the axial direction of the first axle housing 310 with a spacing, the two heat dissipation air inlets 301 are arranged one-to-one corresponding to the two traction motors 20, so as to ensure the heat dissipation effect. A second sub-air duct 5141 is formed in the connecting arm 514 and communicates with the first sub-air duct 5131, and the second connecting air port 512 is located on the connecting arm 514. Through such a setting, the airflow blown by the fan 530 into the first axle housing 310 flows to both ends respectively, which can realize the effect of guiding and uniform distribution of the airflow. By adding the connecting arm 514 to the two inclined arms of the traditional A-frame, sufficient space can be provided for the setting of the second connecting air port 512, and the airflow blown by the fan 530 can enter the two first sub-air ducts 5131 from the middle to both sides respectively, so that the airflow entering the two first sub-air ducts 5131 is more uniform, and the heat dissipation effect is ensured.

[0049] In one embodiment of this embodiment, the end housing 312 and the traction motor 20 may, for example, be two separate structural members, and the traction motor 20 is connected between the middle housing 311 and the end housing 312 through the connecting flange 313. In another embodiment of this embodiment, the end housing 312 and the traction motor 20 may, for example, be a structural member fixed together, and the connecting flange 313 fixes the end housing 312 and the middle housing 311 together.

[0050] Figure 14The flow path from the first sub-air duct 5131 into the first bridge housing 310 is shown by the dashed arrow. The traction motor 20 includes a stator 22 and a rotor 21. The inner wall of the first bridge housing 310 (including the intermediate housing 311 and the end housing 312) is spaced apart from the housing of the stator 22, and the connecting flange 313 is connected to the traction motor 20, for example, by a plurality of connecting blocks that are spaced apart along the circumference of the traction motor 20, and the gap between two connecting blocks forms the first through hole 102. In this way, the connecting flange 313 can be connected to the traction motor 20 while ensuring that the airflow can pass through the intermediate housing 311, enter the end housing 312 through the first through hole 102, enter the internal gap of the rotor 21 from the air hole 202 on the end cover of the stator 22 located in the end housing 312, and finally enter the intermediate housing 311 from the opening on the other end cover of the stator 22 located in the intermediate housing 311, and finally blow out to the outside environment from the heat dissipation air outlet 302. The above arrangement allows the airflow blown into the first bridge housing 310 to pass through the interior of the traction motor 20, which can more fully contact the traction motor 20 and improve the heat dissipation efficiency. The main heat dissipation position in the traction motor 20 is the coil of the rotor 21, and the above path can make the airflow flow through the internal gap of the rotor 21 and fully contact the coil, thereby improving the heat dissipation effect.

[0051] In some embodiments, reference can be made to Figure 14 The inner cavity 3111 includes a first sub-cavity between the two traction motors 20, the heat dissipation air outlet 302 is located on the wall of the first bridge housing 310 that encloses the first sub-cavity, and the two heat dissipation air inlets 301 are separated from the first sub-cavity by the two traction motors 20. Specifically, a protruding portion 3112 can be provided on the inner wall of the first bridge housing 310 (specifically, the intermediate housing 311), the protruding portion 3112 abuts against the outer wall of the traction motor 20, so that the first sub-cavity and the heat dissipation air inlet 301 are separated, so that the airflow blown from the heat dissipation air inlet 301 cannot directly enter the first sub-cavity from the outside of the traction motor 20, but instead passes through the internal gap of the rotor 21 of the traction motor 20 before entering the first sub-cavity, which can increase the path of the heat dissipation airflow and ensure the heat dissipation effect and prevent waste of air volume.

[0052] In addition, it should be understood that the above-mentioned various embodiments are only exemplary descriptions of the present application, and the technical solutions of each embodiment can be arbitrarily combined and used without conflict in technical features, contradiction in structure, and violation of the purpose of the application.

[0053] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A mining dump truck suspension (10) characterized by, The utility model relates to a side frame (100) comprising two longitudinally arranged longitudinal beams (110); a first cross beam (210) connected between the two longitudinal beams (110), wherein the first cross beam (210) is a box-shaped beam; a first axle housing (310) arranged on one side of the first cross beam (210); two first suspension cylinders (410) connected between the first cross beam (210) and the first axle housing (310), wherein the first cross beam (210) and the first axle housing (310) are hinged through the first suspension cylinders (410), and the two first suspension cylinders (410) are respectively connected to the two ends of the first cross beam (210). The first cross beam (210) is hollow inside, and the cross section of the first cross beam (210) is a hollow rectangle. The first cross beam (210) comprises a box-shaped main body (211) and connecting supports (212) arranged at the two ends of the box-shaped main body (211), wherein the first suspension cylinders (410) are hinged to the connecting supports (212), the box-shaped main body (211) comprises an upper wing plate (2111) and first side wing plates (2112) arranged at the two ends, the upper wing plate (2111) is an integral structure, and the two ends of the upper wing plate (2111) have two connecting portions (21111) that protrude beyond the first side wing plates (2112), and the connecting supports (212) are welded to the connecting portions (21111) and the first side wing plates (2112). The box-shaped main body (211) further comprises a lower wing plate (2113) arranged opposite to the upper wing plate (2111), and two second side wing plates (2114) arranged between the upper wing plate (2111) and the lower wing plate (2113), wherein the two second side wing plates (2114) are arranged opposite to each other, and the upper wing plate (2111), the lower wing plate (2113), the two first side wing plates (2112), and the two second side wing plates (2114) are welded to form a hollow box-shaped structure. The first axle housing (310) comprises a middle housing (311) and end housings (312) arranged at the two ends of the middle housing (311), wherein the middle housing (311) and the end housings (312) have traction motor accommodating positions for connecting traction motors (20) between the middle housing (311) and the end housings (312) through connecting flanges (313).

2. The mining dump truck suspension (10) of claim 1, wherein, The middle housing (311) has an inner cavity (3111), and two heat dissipation air inlets (301) and a heat dissipation air outlet (302) respectively communicating with the inner cavity (3111); and the mine dump truck suspension (10) further comprises 3. The mining dump truck suspension (10) of claim 2, wherein, ​ 4. The mining dump truck suspension (10) of claim 3, wherein, ​ 5. The mining dump truck suspension (10) of claim 1, wherein, ​ 6. The mining dump truck suspension (10) of claim 5, wherein, ​ A stabilizer frame (510) is arranged on the middle shell (311), and includes opposite axle housing connecting ends (501) and frame connecting ends (502). The axle housing connecting ends (501) are fixedly connected to the middle shell (311), and the frame connecting ends (502) are hingedly connected to the side frame (100). The axle housing connecting ends (501) are provided with first connecting air inlets (511), and the first connecting air inlets (511) are connected to the heat dissipation air inlets (301) to fixedly connect the first axle housing (310). The stabilizer frame (510) is further provided with second connecting air inlets (512) and air ducts (503) connected between the first connecting air inlets (511) and the second connecting air inlets (512). A fan mounting seat (520) is fixed to the stabilizer frame (510). The heat dissipation air inlets (301) are communicated with the heat dissipation air outlets (302) through first through holes (201) between the connecting flanges (313) and the traction motor (20) and internal clearances of rotors (21) of the traction motor (20). The stabilizer frame (510) includes two inclined arms (513) and a connecting arm (514) connected between the two inclined arms (513). One end of each of the two inclined arms (513) is hingedly connected to the side frame (100), and the other end is connected to the heat dissipation air inlets (301). The first sub-air ducts (5131) are formed in the two inclined arms (513) respectively. The two heat dissipation air inlets (301) are arranged at intervals along the axis direction of the first axle housing (310). The second sub-air ducts (5141) are formed in the connecting arm (514) and communicated with the first sub-air ducts (5131). The second connecting air inlets (512) are located on the connecting arm (514).

7. The mining dump truck suspension (10) of claim 6, wherein, The longitudinal beams (110) include a first sub-longitudinal beam (111) and a second sub-longitudinal beam (112). The first cross beam (210) is fixedly connected between the first sub-longitudinal beam (111) and the second sub-longitudinal beam (112).

8. The mining dump truck suspension (10) of claim 1, wherein, The longitudinal beams (110) further include a third sub-longitudinal beam (113). The mine dump truck suspension (10) further includes:

9. The mining dump truck suspension (10) of claim 8, wherein, A second cross beam (220) is connected between the two longitudinal beams (110), and the second cross beam (220) is fixedly connected between the second sub-longitudinal beam (112) and the third sub-longitudinal beam (113). A second axle housing (320) is arranged on one side of the second cross beam (220). Two second suspension cylinders (420) are connected between the second cross beam (220) and the second axle housing (320). The second cross beam (220) and the second axle housing (320) are hingedly connected through the second suspension cylinders (420). The two second suspension cylinders (420) are respectively connected to two ends of the second cross beam (220). The two first suspension cylinders (410) and the two second suspension cylinders (420) are connected through an energy accumulator. The mine dump truck suspension (10) further includes:

10. A mining dump truck (1) characterized in that, ​ A mine dump truck suspension (10) according to any one of claims 1-9; and A traction motor (20) is arranged in the first axle housing (310).

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