Double-wishbone suspension of mining dump truck

Abstract

The double-wishbone suspension comprises a front axle, an upper wishbone, a lower wishbone, an oil gas suspension cylinder and a frame, a wheel connecting section is arranged at the outer end of the front axle, a master pin connecting end is arranged at the inner end of the front axle, and the upper side and the lower side of the master pin connecting end are in spherical hinge connection with the outer ends of the upper wishbone and the lower wishbone respectively; the inner ends of the upper cross arm and the lower cross arm are respectively hinged with the frame, a top bearing seat is arranged at the top of the upper cross arm, a frame support is arranged at the upper part of the frame, and two ends of the oil-gas suspension cylinder are respectively in spherical hinge connection with the top bearing seat and the frame support; the connecting point of the oil gas suspension cylinder and the frame, the connecting point of the oil gas suspension cylinder and the top bearing seat, the connecting point of the upper cross arm and the front axle and the connecting point of the lower cross arm and the front axle are located on the same plane. According to the utility model, the load of each part is reasonably distributed, additional force or moment of force can be prevented from being generated, and the comfort and the controllability of the mining dump truck during no-load and full-load are optimal.

Description

Technical Field

[0001] The utility model relates to a mining dump truck, in particular to a double-wishbone suspension of a mining dump truck. Background Art

[0002] The mining dump truck is an important transportation equipment for open-pit mining. The front suspension structure affects the comfort and controllability of the whole vehicle. The double-wishbone suspension has good comprehensive performance and is widely used in mining dump trucks. The existing technical solutions are as follows:

[0003] The patent with the publication number of CN204936730U discloses a front suspension of a mining dump truck, including: a suspension cylinder, an upper wishbone, and a lower wishbone; the outer ends of the upper wishbone and the lower wishbone are respectively rotatable left and right and swingable up and down at the upper and lower ends of the front wheel axle of the mining dump truck, and the inner ends of the upper wishbone and the lower wishbone are both connected to the frame of the mining dump truck; the top end of the suspension cylinder is rotatable left and right and swingable up and down with the frame, and the bottom end of the suspension cylinder is rotatable left and right and swingable up and down with the top end of the upper wishbone.

[0004] The Chinese patent with the publication number of CN104149566B discloses a double-wishbone independent suspension assembly and an engineering vehicle, including: a pair of upper swing arms, a pair of lower swing arms, a pair of elastic and damping elements, an upper swing arm support and a lower swing arm support for fixing on the main reducer of the engineering vehicle. The upper swing arm is installed between the wheel side steering knuckle of the engineering vehicle and the upper swing arm support, and the lower swing arm is installed between the wheel side steering knuckle and the lower swing arm support. The upper swing arm is connected to the wheel side steering knuckle through a first ball joint, and an elastic and damping element support is also provided on the upper plane of the first ball joint. The elastic and damping elements are arranged on both sides of the frame of the engineering vehicle and are connected between the elastic and damping element support and the frame of the engineering vehicle.

[0005] However, the existing suspension does not consider the optimal working angles of the kingpin axis and the oil-gas suspension cylinder axis, as well as the positional relationship of the connection points of each component. Since the above parameters affect the controllability, comfort, front wheel alignment and the force conditions of the components of the mining dump truck, the controllability and comfort of the mining vehicle are restricted by the suspension. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a double-wishbone suspension for a mining dump truck, which can reasonably distribute the loads of each component, prevent the generation of additional forces or torques, and make the comfort and controllability of the mining dump truck reach the optimum when it is unloaded and fully loaded.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is:

[0008] Double-wishbone suspension for mining dump truck, comprising: front axle, upper wishbone, lower wishbone, oil-gas suspension cylinder, and vehicle frame. A wheel connection section is provided at the outer end of the front axle, and a kingpin connection end is provided at the inner end. The upper and lower sides of the kingpin connection end are respectively ball-joint connected to the outer ends of the upper wishbone and the lower wishbone; the inner ends of the upper wishbone and the lower wishbone are respectively hinged to the vehicle frame. A top bearing seat is provided at the top of the upper wishbone, and a vehicle frame support is provided on the upper part of the vehicle frame. The two ends of the oil-gas suspension cylinder are respectively ball-joint connected to the top bearing seat and the vehicle frame support; the connection point between the oil-gas suspension cylinder and the vehicle frame, the connection point between the oil-gas suspension cylinder and the top bearing seat, the connection point between the upper wishbone and the front axle, and the connection point between the lower wishbone and the front axle are in a plane.

[0009] Further, when the vehicle is fully loaded, the connection point between the upper wishbone and the front axle and the connection point between the lower wishbone and the front axle form a kingpin axis. When the vehicle is fully loaded, the sum of the angle between the kingpin axis and the vertical plane and the angle between the kingpin axis and the front axle axis of the front axle is 90 degrees; when the vehicle is unloaded, the sum of the angle between the kingpin axis and the vertical plane and the angle between the kingpin axis and the front axle axis is less than 90 degrees.

[0010] Further, the connection point between the oil-gas suspension cylinder and the vehicle frame and the connection point between the oil-gas suspension cylinder and the upper wishbone form an oil-gas suspension cylinder axis. The angle between the oil-gas suspension cylinder axis and the vertical plane is 15 - 25 degrees when the vehicle is fully loaded.

[0011] Further, a kingpin shaft hole is longitudinally provided at the kingpin connection end. Kingpin ball bearings are respectively provided at the upper and lower ends of the kingpin shaft hole. Kingpin ball bearing retaining rings are respectively provided at the upper and lower ends of the kingpin connection end. Kingpin threaded holes are respectively provided on the upper and lower end faces of the kingpin connection end. The kingpin ball bearing retaining rings are provided with a press plate center hole and a plurality of press plate connection holes. The plurality of press plate connection holes are located outside the press plate center hole. A kingpin bolt passes through the press plate connection holes and is connected to the kingpin threaded holes, connecting the two kingpin ball bearing retaining rings to the upper and lower end faces of the kingpin connection end respectively; The upper cross arm includes: an upper cross arm body, a first fork arm, a second fork arm, an upper connection seat, and a top bearing seat; The first fork arm and the second fork arm are respectively provided on both sides of the inner end of the upper cross arm body. The first fork arm is provided with a first inner hole, and the second fork arm is provided with a second inner hole. The first inner hole and the second inner hole are relatively positioned and coaxial; The upper connection seat is provided at the outer end of the upper cross arm body. An upper connection seat inner cavity is provided at the bottom of the upper connection seat. A plurality of upper ball head threaded holes are provided on the bottom end face of the upper connection seat; An upper ball head flange is provided at the rear of the upper steering ball head of the upper ball head pin. The upper ball head flange is provided with an upper ball head flange through hole. The upper steering ball head at the lower end of the upper ball head pin is installed in the kingpin ball bearing. The upper end of the upper ball head pin is located in the upper connection seat inner cavity. An upper ball head bolt passes through the upper ball head flange through hole and is connected to the upper ball head threaded hole, connecting the upper end of the upper ball head pin to the bottom of the upper connection seat; The top bearing seat is provided at the top of the upper cross arm body and is located on one side of the upper bearing seat. The top bearing seat is provided with a top bearing inner cavity. A secondary ball head bearing is installed in the top bearing inner cavity. A plurality of top bearing seat threaded holes are provided on the end face of the top bearing seat. A secondary ball head press plate is provided on the end face of the top bearing seat. The secondary ball head press plate is provided with a secondary ball head press plate through hole; A secondary ball head bolt passes through the secondary ball head press plate through hole and is connected to the top bearing seat threaded hole; The lower cross arm includes: a lower cross arm body, a third fork arm, a fourth fork arm, and a lower connection seat; The third fork arm and the fourth fork arm are respectively provided on both sides of the inner end of the lower cross arm body. The third fork arm is provided with a third inner hole, and the fourth fork arm is provided with a fourth inner hole. The third inner hole and the fourth inner hole are relatively positioned and coaxial; The lower connection seat is provided at the outer end of the lower cross arm body. The lower connection seat is provided with a lower connection seat through hole. A plurality of lower connection seat threaded holes are provided on the bottom end face of the lower connection seat; A lower ball head pin connecting plate is provided at the lower part of the lower connection seat. The lower ball head pin connecting plate is provided with a plurality of lower ball head pin connecting through holes and a plurality of lower connection seat connecting through holes. The lower ball head pin connecting through holes are located inside the lower connection seat connecting through holes; The lower steering ball head of the lower ball head pin is installed in the kingpin ball bearing. A lower ball head threaded hole is provided at the bottom end of the lower ball head pin. A lower connection seat connecting bolt passes through the lower connection seat connecting through hole and is connected to the lower connection seat threaded hole. A lower ball head pin connecting bolt passes through the lower ball head pin connecting through hole and is connected to the lower ball head threaded hole; A frame support is provided at the upper part of the frame. The frame support is provided with a frame support inner cavity. A frame ball head bearing is provided in the frame support inner cavity;Suspension ball pins are respectively arranged at the upper and lower ends of the oil-gas suspension cylinder. Suspension ball heads are arranged at the ends of the suspension ball pins. Multiple frame support threaded holes are arranged on the end face of the frame support. A support pressing plate is arranged on the side of the end face of the frame support. Multiple through holes of the support pressing plate are arranged on the support pressing plate; The suspension ball head at the lower end of the oil-gas suspension cylinder is installed in the secondary ball head bearing inside the inner cavity of the top bearing. The suspension ball head at the upper end of the oil-gas suspension cylinder is installed in the frame ball head bearing. The support bolts pass through the through holes of the support pressing plate and are connected to the frame support threaded holes.

[0012] Further, the width between the first fork arm and the second fork arm is greater than the width between the third fork arm and the fourth fork arm. The fourth fork arm is located at the front lower part of the second fork arm.

[0013] Further, the first inner hole and the second inner hole are hinged to the frame through an upper pin shaft, and the third inner hole and the fourth inner hole are hinged to the frame through a lower pin shaft.

[0014] Further, the suspension ball pins are respectively arranged on the front and rear sides of the oil-gas suspension cylinder. A rectangular cross beam is arranged at the lower part of the frame. The lower cross arms are located on both sides of the rectangular cross beam.

[0015] Further, the front axle, the upper cross arm, the lower cross arm, and the oil-gas suspension cylinder are respectively installed on both sides of the frame.

[0016] Further, the connection point between the oil-gas suspension cylinder and the upper cross arm is not on the main pin axis.

[0017] The technical effects of the present utility model include:

[0018] The present utility model enables the comfort and controllability of the mining dump truck to reach the optimal level when it is unloaded and fully loaded, effectively reduces the wear of the front-wheel tires, prolongs the service life of the tires, reasonably distributes the loads of each component, and has the advantages of strong operability, reduced vehicle use cost, and improved user experience.

[0019] 1. The present utility model takes into account the different requirements for the suspension performance of the mining dump truck when it is fully loaded, and can make the comfort and controllability of the mining dump truck reach the optimal level when it is unloaded and fully loaded.

[0020] 2. The present utility model ensures that when the vehicle is fully loaded, the front-wheel tires are perpendicular to the ground, effectively reduces the wear of the tires, and prolongs the service life of the tires.

[0021] 3. The present utility model reasonably distributes the loads of each component, prevents the generation of additional forces or torques, and has strong operability and reduced vehicle use cost. Description of the Drawings

[0022] Figure 1 is the structural schematic diagram of the double cross-arm suspension of the mining dump truck in the present utility model;

[0023] Figure 2It is a schematic structural diagram of the upper cross arm in the present utility model;

[0024] Figure 3 It is a schematic top view of the upper cross arm in the present utility model;

[0025] Figure 4 It is a schematic structural diagram of the lower cross arm in the present utility model;

[0026] Figure 5 It is a schematic top view of the lower cross arm in the present utility model;

[0027] Figure 6 It is a schematic diagram of the force analysis of the double cross arm suspension of a mining dump truck in the present utility model. Detailed implementation manners

[0028] The following description fully shows the specific implementation manners of the present utility model, enabling those skilled in the art to practice and reproduce.

[0029] As Figure 1 shown, it is a schematic structural diagram of the double cross arm suspension of a mining dump truck in the present utility model.

[0030] The two sides of the double cross arm suspension of the mining dump truck are symmetrically structured, and the left side structure is shown in the figure.

[0031] The double cross arm suspension of the mining dump truck includes: a front axle 1, an upper cross arm 2, a lower cross arm 3, an oil-gas suspension cylinder 4, and a vehicle frame 5. The front axle 1, the upper cross arm 2, the lower cross arm 3, and the oil-gas suspension cylinder 4 are respectively installed on both sides of the vehicle frame 5.

[0032] The outer end of the front axle 1 is provided with a wheel connection section 11, and the inner end is provided with a kingpin connection end 12. A kingpin shaft hole is longitudinally provided in the kingpin connection end 12, and kingpin ball bearings are respectively provided at the upper and lower ends of the kingpin shaft hole; the upper steering ball of the upper ball joint pin 13 is installed in the kingpin ball bearing, and the other end is connected to the outer end of the upper cross arm 2; the lower steering ball of the lower ball joint pin 15 is installed in the kingpin ball bearing, and the other end is connected to the outer end of the lower cross arm 3.

[0033] Kingpin ball bearing retaining rings 14 are respectively provided at the upper and lower ends of the kingpin connection end 12. Kingpin threaded holes are respectively provided on the upper and lower end faces of the kingpin connection end 12. The kingpin ball bearing retaining ring 14 is provided with a pressure plate center hole and a plurality of pressure plate connection holes. The plurality of pressure plate connection holes are located outside the pressure plate center hole. The kingpin bolt passes through the pressure plate connection holes and is connected to the kingpin threaded holes, connecting the kingpin ball bearing retaining ring 14 to the upper and lower end faces of the kingpin connection end 12, so that the kingpin ball bearings are fixed in the kingpin shaft hole, and the upper steering ball and the lower steering ball are respectively installed in the kingpin ball bearings.

[0034] The rear part of the upper steering ball of the upper ball joint pin 13 is provided with an upper ball joint flange, and the upper ball joint flange is provided with an upper ball joint flange through hole.

[0035] Multiple kingpin threaded holes are located on the same circumference, and multiple pressure plate connection holes are located on the same circumference. The positions of the kingpin connection threaded holes and the pressure plate connection holes are opposite to each other.

[0036] As Figure 2 shown, it is a schematic structural diagram of the upper cross arm 2 of the present utility model; as Figure 3 shown, it is a schematic top view of the upper cross arm 2 of the present utility model.

[0037] The outer end of the upper cross arm 2 (away from the frame 5) is ball-jointed to the upper part of the inner end of the front axle 1, and the inner end of the upper cross arm 2 (close to the frame 5) is hinged to the frame 5 through the upper pin shaft 6. The outer end of the upper cross arm 2 can rotate in any direction around the upper steering ball head, and the inner end of the upper cross arm 2 rotates up and down around the upper pin shaft 6.

[0038] The upper cross arm 2 includes: an upper cross arm body 21, a first fork arm 22, a second fork arm 23, an upper connection seat 24, and a top bearing seat 25; the first fork arm 21 and the second fork arm 22 are respectively arranged on both sides of the inner end of the upper cross arm body 21. The first fork arm 22 is provided with a first inner hole 221, and the second fork arm 23 is provided with a second inner hole 231. The positions of the first inner hole 221 and the second inner hole 231 are opposite to each other, and the axes of the first inner hole 221 and the second inner hole 231 are coaxial; the upper connection seat 24 is arranged at the outer end of the upper cross arm body 21, and the bottom of the upper connection seat 24 is provided with an upper connection seat inner cavity. Multiple upper ball head threaded holes are arranged on the bottom end face of the upper connection seat 24; the upper end of the upper ball head pin 13 is located in the upper connection seat inner cavity, and the upper ball head bolt passes through the upper ball head flange through hole and is connected to the upper ball head threaded hole to connect the upper end of the upper ball head pin 13 to the bottom of the upper connection seat 24.

[0039] The top bearing seat 25 is arranged on the top of the upper cross arm body 21 and is located on one side of the upper bearing seat 24. The top bearing seat 25 is provided with a top bearing inner cavity 251, and a secondary ball head bearing is installed in the top bearing inner cavity 251. The end face of the top bearing seat 25 is provided with multiple top bearing seat threaded holes, and the end face of the top bearing seat 25 is provided with a secondary ball head pressure plate. The secondary ball head pressure plate is provided with a secondary ball head pressure plate through hole; the secondary ball head bolt passes through the secondary ball head pressure plate through hole and is connected to the top bearing seat threaded hole, and the secondary ball head pressure plate presses the secondary ball head bearing in the top bearing inner cavity 251.

[0040] Multiple upper ball head threaded holes are located on the same circumference, multiple suspension cylinder ball head pin threaded holes are located on the same circumference, and multiple secondary ball head pressure plate through holes are located on the same circumference.

[0041] As Figure 4 shown, it is a schematic structural diagram of the lower cross arm 3 of the present utility model; as Figure 5 shown, it is a schematic top view of the lower cross arm 3 of the present utility model.

[0042] The outer end of the lower cross arm 3 (away from the vehicle frame 5) is ball-jointed to the lower end of the front axle 1, and the inner end of the lower cross arm 3 (close to the vehicle frame 5) is hinged to the vehicle frame 5 through a lower pin shaft 7. The outer end of the lower cross arm 3 can rotate in any direction around the lower steering ball joint, and the inner end of the lower cross arm 3 rotates up and down around the lower pin shaft 7.

[0043] The lower cross arm 3 includes: a lower cross arm body 31, a third fork arm 32, a fourth fork arm 33, and a lower connecting seat 34; the third fork arm 32 and the fourth fork arm 33 are respectively arranged on both sides of the inner end of the lower cross arm body 31. The third fork arm 32 is provided with a third inner hole 321, and the fourth fork arm 33 is provided with a fourth inner hole 331. The positions of the third inner hole 321 and the fourth inner hole 331 are opposite, and the axes of the third inner hole 321 and the fourth inner hole 331 are coaxial; the lower connecting seat 34 is arranged at the outer end of the lower cross arm body 31. The lower connecting seat 34 is provided with a lower connecting seat through hole 341, and the bottom end face of the lower connecting seat 34 is provided with a plurality of lower connecting seat threaded holes; a lower ball joint pin connecting plate is arranged below the lower connecting seat 34. The lower ball joint pin connecting plate is provided with a plurality of circumferentially identical lower ball joint pin connecting through holes and a plurality of circumferentially identical lower connecting seat connecting through holes. The lower ball joint pin connecting through holes are located inside the lower connecting seat connecting through holes; the bottom end of the lower ball joint pin 15 is provided with a lower ball joint threaded hole. The lower connecting seat connecting bolt passes through the lower connecting seat connecting through hole to connect the lower connecting seat threaded hole, and the lower ball joint pin connecting bolt passes through the lower ball joint pin connecting through hole to connect the lower ball joint threaded hole.

[0044] The upper and lower ends of the oil-gas suspension cylinder 4 are ball-jointed to the vehicle frame 5 and the upper cross arm 2 (or hinged through a pin shaft). The upper and lower ends of the oil-gas suspension cylinder 4 are respectively provided with suspension cylinder ball joint pins, and the end of the suspension cylinder ball joint pin is provided with a suspension cylinder ball joint. The suspension cylinder ball joint at the lower end of the oil-gas suspension cylinder 4 is installed on the secondary ball joint bearing in the inner cavity 251 of the top bearing. The suspension cylinder ball joint pins are respectively arranged on the front and rear sides of the oil-gas suspension cylinder 4.

[0045] A rectangular cross beam 51 is arranged at the lower part of the vehicle frame 5, and a vehicle frame support 52 is arranged at the upper part. The vehicle frame support 52 is provided with a vehicle frame support inner cavity, and the vehicle frame support inner cavity is provided with a vehicle frame ball joint bearing. The end face of the vehicle frame support 52 is provided with a plurality of vehicle frame support threaded holes, and a support pressing plate is arranged on the side part of the end face of the vehicle frame support 52. The support pressing plate is provided with a plurality of support pressing plate through holes; the suspension cylinder ball joint at the upper end of the oil-gas suspension cylinder 4 is installed in the vehicle frame ball joint bearing, and the support bolt passes through the support pressing plate through hole to be connected to the vehicle frame support threaded hole, and the suspension cylinder ball joint is fixed in the vehicle frame ball joint bearing by using the support pressing plate.

[0046] The width A between the first fork arm 22 and the second fork arm 23 is greater than the width B between the third fork arm 32 and the fourth fork arm 33. The upper cross arm 2 serves to connect the front axle 1, the oil-gas suspension cylinder 4, and the vehicle frame 5. During the operation of the mining dump truck, the load borne by the upper cross arm 2 is greater than that borne by the lower cross arm 3. Therefore, the width A between the first fork arm 22 and the second fork arm 23 is designed to be greater than the width B between the third fork arm 32 and the fourth fork arm 33, and the cross-sectional areas of the components are reasonably distributed according to the force conditions of the upper cross arm 2 and the lower cross arm 3. Additionally, with the width A being greater than the width B, the width of the rectangular cross beam 51 can be effectively reduced. On the one hand, the weight of the vehicle frame 5 is reduced, and on the other hand, space is provided for installing the steering mechanism at the rear of the rectangular cross beam 51.

[0047] As Figure 6 shown, it is a schematic diagram of the force analysis of the double cross-arm suspension of the mining dump truck in the present utility model.

[0048] The connection point C between the oil-gas suspension cylinder 4 and the vehicle frame 5, the connection point D between the oil-gas suspension cylinder 4 and the upper cross arm 2, the connection point E between the upper cross arm 2 and the front axle 1, and the connection point F between the lower cross arm 3 and the front axle 1 are in a plane and are all spherical hinge connections. Also, the fourth fork arm 33 is in front of the second fork arm 23.

[0049] The connection point E between the upper cross arm 2 and the front axle 1 and the connection point F between the lower cross arm 3 and the front axle 1 together form the kingpin axis EF. When the vehicle is fully loaded, the sum of the angle between the kingpin axis EF and the vertical plane and the angle (acute angle) between the kingpin axis EF and the front axle axis 16 of the front axle 1 is 90 degrees. When the vehicle is fully loaded, the sum of the angle between the kingpin axis EF and the vertical plane and the angle between the kingpin axis EF and the front axle axis 16 is 90 degrees, that is, the camber angle of the front wheel is 0 degrees; when the vehicle is unloaded, the oil-gas suspension cylinder 4 extends, the kingpin axis EF rotates counterclockwise, and the sum of the angle between the kingpin axis EF and the vertical plane and the angle between the kingpin axis EF and the front axle axis 16 is less than 90 degrees, that is, a certain camber angle is generated at the front wheel. This ensures that the front wheel has a certain camber angle when the vehicle is unloaded and the camber angle of the front wheel is 0 degrees when the vehicle is fully loaded, making the tires perpendicular to the ground when the vehicle is fully loaded, effectively reducing tire wear and extending the service life of the tires.

[0050] The connection point C between the oil-gas suspension cylinder 4 and the vehicle frame 5 and the connection point D between the oil-gas suspension cylinder 4 and the upper cross arm 2 together form the oil-gas suspension cylinder axis CD. The angle between the oil-gas suspension cylinder axis CD and the vertical plane is 15 - 25 degrees when the vehicle is fully loaded; on the one hand, it ensures that the suspension reasonably distributes the vertical stiffness and the lateral stiffness, and on the other hand, it keeps the cantilever length of the vehicle frame support 52 within a reasonable range, extending the service life of the vehicle frame 5.

[0051] The axes of the first inner hole 221 and the second inner hole 231 are coaxial, which can ensure that the upper cross arm 2 rotates up and down around the vehicle frame 5. The axes of the third inner hole 321 and the fourth inner hole 331 are coaxial, which can ensure that the lower cross arm 3 rotates up and down around the vehicle frame 5. The common axis of the first inner hole 221 and the second inner hole 231 is parallel to the common axis of the third inner hole 321 and the fourth inner hole 331. When the oil-gas suspension cylinder 4 is in the extension or compression stroke, the connection point C between the oil-gas suspension cylinder 4 and the vehicle frame 5, the connection point D between the oil-gas suspension cylinder 4 and the upper cross arm 2, the connection point E between the upper cross arm 2 and the front axle 1, and the connection point F between the lower cross arm 3 and the front axle 1 are always in a plane, which can prevent the generation of additional forces or torques and reduce the loads on each component.

[0052] The connection point D between the oil-gas suspension cylinder 4 and the upper cross arm 2 is not on the kingpin axis EF, which provides space for the installation of the rim.

[0053] The terms used in the present invention are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A double wishbone suspension for a mining dump truck, characterized in that: include: Front axle, upper cross arm, lower cross arm, oil-gas suspension cylinder, frame, the outer end of the front axle is provided with a wheel connecting section, the inner end is provided with a kingpin connecting end, the upper and lower sides of the kingpin connecting end are respectively connected to the outer ends of the upper cross arm and the lower cross arm by ball joints; the inner ends of the upper cross arm and the lower cross arm are respectively hinged to the frame, the top of the upper cross arm is provided with a top bearing seat, the upper part of the frame is provided with a frame support, the two ends of the oil-gas suspension cylinder are respectively connected to the top bearing seat and the frame support by ball joints; the connection points of the oil-gas suspension cylinder and the frame, the connection points of the oil-gas suspension cylinder and the top bearing seat, the connection points of the upper cross arm and the front axle, and the connection points of the lower cross arm and the front axle are on the same plane.

2. The double wishbone suspension for a mining dump truck according to claim 1, characterized in that: When the vehicle is fully loaded, the upper wishbone and front axle connection point, the lower wishbone and front axle connection point form the kingpin axis. When the vehicle is fully loaded, the sum of the angle between the kingpin axis and the vertical plane plus the angle between the kingpin axis and the front axle axis is 90 degrees; when the vehicle is unloaded, the sum of the angle between the kingpin axis and the vertical plane plus the angle between the kingpin axis and the front axle axis is less than 90 degrees.

3. The double wishbone suspension for a mining dump truck according to claim 1 or 2, characterized in that: The connection points of the oil-gas suspension cylinder and the frame, and the connection points of the oil-gas suspension cylinder and the upper cross arm form the oil-gas suspension cylinder axis. When the vehicle is fully loaded, the angle between the oil-gas suspension cylinder axis and the vertical plane is 15-25 degrees.

4. The double wishbone suspension for a mining dump truck according to claim 1, characterized in that: A kingpin shaft hole is longitudinally arranged at the kingpin connecting end, and main ball head bearings are respectively arranged at the upper and lower ends of the kingpin shaft hole, and main ball head bearing pressure rings are respectively arranged at the upper and lower ends of the kingpin connecting end, and the upper and lower end faces of the kingpin connecting end are respectively provided with kingpin threaded holes, and the main ball head bearing pressure ring is provided with a pressure plate center hole and multiple pressure plate connecting holes, and the multiple pressure plate connecting holes are located outside the pressure plate center hole, and the kingpin bolt passes through the pressure plate connecting hole and is connected to the kingpin threaded hole, and the two main ball head bearing pressure rings are respectively connected to the upper and lower end faces of the kingpin connecting end; the upper cross arm includes: an upper cross arm body, a first fork arm, a second fork arm, an upper connecting seat, and a top bearing seat; the first fork arm and the second fork arm are respectively arranged on both sides of the inner end of the upper cross arm body, the first fork arm is provided with a first inner hole, the second fork arm is provided with a second inner hole, and the first inner hole , and the second inner hole is relatively positioned and coaxial; the upper connecting seat is arranged at the outer end of the upper cross arm body, and an upper connecting seat inner cavity is arranged at the bottom of the upper connecting seat, and a plurality of upper ball head threaded holes are arranged on the bottom end face of the upper connecting seat; an upper ball head flange is arranged at the rear part of the upper steering ball head of the upper ball head pin, and the upper ball head flange is provided with an upper ball head flange through hole, and the upper steering ball head at the lower end of the upper ball head pin is installed in the main ball head bearing, and the upper end of the upper ball head pin is located in the upper connecting seat inner cavity, and the upper ball head bolt passes through the upper ball head flange through hole and is connected to the upper ball head threaded hole to connect the upper end of the upper ball head pin to the bottom of the upper connecting seat; the top bearing seat is arranged at the top of the upper cross arm body and is located on one side of the upper bearing seat, the top bearing seat is provided with a top bearing inner cavity, and a secondary ball head bearing is installed in the top bearing inner cavity, and a plurality of top The threaded hole of the bearing seat, the end face of the top bearing seat is provided with a secondary ball head pressure plate, and the secondary ball head pressure plate is provided with a secondary ball head pressure plate through hole; the secondary ball head bolt passes through the secondary ball head pressure plate through hole to connect the threaded hole of the top bearing seat; the lower cross arm comprises: a lower cross arm body, a third fork arm, a fourth fork arm, and a lower connecting seat; the third fork arm and the fourth fork arm are respectively arranged on both sides of the inner end of the lower cross arm body, the third fork arm is provided with a third inner hole, and the fourth fork arm is provided with a fourth inner hole, and the third inner hole and the fourth inner hole are relatively positioned and coaxial; the lower connecting seat is arranged at the outer end of the lower cross arm body, the lower connecting seat is provided with a lower connecting seat through hole, and a plurality of lower connecting seat threaded holes are arranged on the bottom end face of the lower connecting seat; a lower ball head pin connecting plate is provided at the lower part of the lower connecting seat, and the lower ball head pin connecting plate is provided with a plurality of lower ball head pin connecting through holes, a plurality of lower connecting The connecting seat connecting through hole, the lower ball pin connecting through hole is located on the inner side of the lower connecting seat connecting through hole; the lower steering ball head of the lower ball pin is installed in the main ball head bearing, the bottom end of the lower ball pin is provided with a lower ball head threaded hole, the lower connecting seat connecting bolt passes through the lower connecting seat connecting through hole to connect the lower connecting seat threaded hole, and the lower ball pin connecting bolt passes through the lower ball pin connecting through hole to connect the lower ball head threaded hole; a frame support is provided on the upper part of the frame, the frame support is provided with a frame support inner cavity, and the frame support inner cavity is provided with a frame ball head bearing; the upper and lower ends of the oil and gas suspension cylinder are respectively provided with suspension cylinder ball pins, the end of the suspension cylinder ball pin is provided with a suspension cylinder ball head, the end face of the frame support is provided with a plurality of frame support threaded holes, the side of the end face of the frame support is provided with a support pressure plate, and the support pressure plate is provided with a plurality of support pressure plate through holes;The suspension cylinder ball head at the lower end of the oil-gas suspension cylinder is installed in the auxiliary ball head bearing in the inner cavity of the top bearing, and the suspension cylinder ball head at the upper end of the oil-gas suspension cylinder is installed in the frame ball head bearing, and the support bolt passes through the support pressure plate through hole and is connected to the frame support threaded hole. ; 5. The double wishbone suspension for a mining dump truck as claimed in claim 4, characterized in that: The width between the first fork arm and the second fork arm is greater than the width between the third fork arm and the fourth fork arm, and the fourth fork arm is located at the lower front part of the second fork arm.

6. The double wishbone suspension for a mining dump truck as claimed in claim 4, characterized in that: The first inner hole, the second inner hole and the vehicle frame are hinged through an upper pin shaft, and the third inner hole, the fourth inner hole and the vehicle frame are hinged through a lower pin shaft.

7. The double wishbone suspension for a mining dump truck according to claim 4, characterized in that: The ball pins of the suspension cylinder are respectively arranged at the front and rear sides of the oil-gas suspension cylinder, a rectangular cross beam is arranged at the lower part of the frame, and the lower cross arms are located at both sides of the rectangular cross beam.

8. The double wishbone suspension for a mining dump truck as claimed in claim 4, characterized in that: The front axle, upper cross arm, lower cross arm and oil-gas suspension cylinder are respectively installed on both sides of the frame.

9. The double wishbone suspension for a mining dump truck according to claim 2, characterized in that: The connection point between the oil-gas suspension cylinder and the upper cross arm is not on the kingpin axis.

Images