Double wishbone suspension wishbone connection device for mining dump truck and use method thereof

Abstract

The present invention discloses a double wishbone suspension cross arm connection device for a mining dump truck, comprising: a seat sleeve, a thrust bearing, a bushing, a pin shaft, a bolt, and a pressure plate; the seat sleeve is provided with a flange end face at the end for rotationally connecting the vehicle frame; two thrust bearings are respectively sleeved on the bushing and located at both ends, and the two thrust bearings are respectively opposite to the flange end faces and the pressure plate; the pin shaft is sleeved in the seat sleeve and the bushing, and the pin shaft is axially provided with a through center hole at the center; the pressure plate is located outside the pin shaft, and a pressure plate through hole is provided at the center; the bolt is passed through the pressure plate through hole and the center hole. The present invention also discloses a method for using a double wishbone suspension cross arm connection device for a mining dump truck. The use of the present invention can avoid the wear of the cross arm when the cross arm is subjected to force, effectively reduce the processing accuracy of the cross arm and the frame-related position, and at the same time, the connection is reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of mining dump trucks, and in particular relates to a double wishbone suspension wishbone connecting device for a mining dump truck and a use method thereof. Background Art

[0002] Mining dump trucks are equipment used to transport earth and mineral materials in open-pit mines. They have huge deadweight and load capacity and operate in harsh environments. Compared with non-independent front suspensions, independent front suspensions separate the mutual influence of wheel hub bounce on both sides, improve the comfort of mining dump trucks, and have great advantages. Double wishbone independent suspension is an independent suspension suitable for mining dump trucks due to its good connection stiffness and reliability.

[0003] However, the cross arm of the double wishbone suspension is directly and rigidly connected to the frame, and the connection angle between the cross arm and the frame cannot be adjusted. The positioning accuracy of the cross arm on the frame will affect the inclination angle of the kingpin and the inclination angle of the front wheel, thereby affecting the vehicle's motion characteristics. At the same time, the reliability of the connection structure between the cross arm and the frame has a direct impact on the reliability of the cross arm suspension. Summary of the invention

[0004] The purpose of the present invention is to provide a double wishbone suspension cross arm connection device for a mining dump truck and a method for using the same, which can avoid wear of the cross arm when the cross arm is subjected to force during use, effectively reduce the processing accuracy of the cross arm and the frame related position, and at the same time ensure reliable connection.

[0005] To achieve the above purpose, the technical solution used in the present invention is:

[0006] The double wishbone suspension cross arm connection device for a mining dump truck comprises: a seat sleeve, a thrust bearing, a bushing, a pin shaft, a bolt, and a pressure plate; the seat sleeve is provided with a flange end face at the end thereof for rotationally connecting to a vehicle frame; two thrust bearings are respectively sleeved on the bushing and located at both ends, and the two thrust bearings are respectively opposite to the flange end faces and the pressure plate; the pin shaft is sleeved in the seat sleeve and the bushing, and a through center hole is axially provided in the center of the pin shaft; the pressure plate is located outside the pin shaft, and a pressure plate through hole is provided in the center thereof; the bolts are passed through the pressure plate through hole and the center hole.

[0007] Furthermore, an outer annular groove is provided on the outer wall of the bushing along the circumferential direction, an inner annular groove is provided on the inner wall along the circumferential direction, and a plurality of through grooves are provided on the inner wall along the axial direction. The outer annular groove and the inner annular groove are connected by a plurality of evenly distributed radial through holes; the through groove and the inner annular groove intersect, and the radial through hole is located between two adjacent through grooves.

[0008] Furthermore, the thrust bearing is provided with a bearing mounting hole and two bearing through holes, the middle part of which is the bearing mounting hole, the two bearing through holes are located outside the bearing mounting hole, a plurality of radial oil grooves are provided on one side wall of the thrust bearing, and the thrust bearing is mounted on the bushing using the bearing mounting hole; the radial oil groove of the thrust bearing on one side of the seat sleeve faces the flange end face of the seat sleeve, and the radial oil groove of the thrust bearing on one side of the pressure plate faces the pressure plate.

[0009] Furthermore, a seat cover fixing through hole is provided on the flange end surface, and a seat cover fixing pin is inserted into the seat cover fixing through hole.

[0010] Furthermore, a first pin shaft countersunk hole is arranged on the right end face of the pin shaft, a second pin shaft countersunk hole is arranged on the inner side wall of the pressure plate, and the pin shaft locating pin is installed in the first pin shaft countersunk hole and the second pin shaft countersunk hole.

[0011] Furthermore, the second adjusting gasket is sleeved on the bolt and is located between the pin shaft and the pressure plate. The second adjusting gasket is provided with a second gasket through hole. The pin shaft locating pin is installed in the first pin shaft countersunk hole, the second gasket through hole and the second pin shaft countersunk hole.

[0012] Furthermore, the first adjusting gasket is sleeved on the bushing and is opposite to the thrust bearing. The first adjusting gasket is provided with a first gasket through hole. The bearing locating pin is inserted into the bearing through hole and the first gasket through hole.

[0013] Furthermore, the outer wall of the pin shaft and the seat sleeve are in interference fit, and the outer wall of the pin shaft and the bushing are in clearance fit.

[0014] The method for using the double wishbone suspension wishbone connection device for a mining dump truck includes:

[0015] The frame and the double wishbone suspension of the mining dump truck are movably connected by a cross arm connection device, and the double wishbone suspension of the mining dump truck is rotatably connected to the front wheel; the double wishbone suspension of the mining dump truck includes: a steering knuckle, an upper spherical bearing, a lower spherical bearing, an upper cross arm, and a lower cross arm; the upper spherical bearing and the lower spherical bearing are respectively fixedly connected to the upper and lower ends of the steering knuckle, the upper cross arm is connected to the upper spherical bearing on one side of the lateral rotation, and the lower cross arm is connected to the lower spherical bearing on one side of the lateral rotation; the upper cross arm and the lower cross arm are laterally provided with two coaxial ears on one side of the longitudinal rotation; the ears are axially provided with a through hole and radially provided with a radial through hole, and the ears are rotatably connected to the frame by a cross arm connection device;

[0016] The seat cover is installed in the seat hole of the frame, and the seat cover fixing pin is inserted into the seat cover fixing through hole and the seat cover positioning hole to fix the seat cover position; the pin shaft is inserted into the seat cover, and the bushing is sleeved on the pin shaft; the bearing positioning pin is inserted into the bearing through hole and the support ear countersunk hole to fix the thrust bearing on both sides of the support ear; the through hole of the support ear is sleeved on the bushing, and the bolt passes through the through hole of the pressure plate and the center hole to connect to the threaded hole of the frame;

[0017] Connect the lubricating oil pipe to the radial hole of the support ear, let the lubricating grease into the lubricating oil pipe, the lubricating grease enters the outer annular groove of the bushing through the radial hole, enters the inner annular groove through the radial through hole, and the lubricating grease enters the axial groove to form an oil film between the inner wall surface of the bushing and the outer wall surface of the pin shaft; the lubricating grease overflows to the left and right sides through the axial through groove, the pin shaft and the seat sleeve are interference fit, and the lubricating grease overflowing from the bushing enters the radial oil groove of the thrust bearing and covers the wall surface of the thrust bearing through the radial oil groove.

[0018] Preferably, the lubricating grease overflowing outward from the radial oil groove of the thrust bearing carries out the wear debris formed by internal wear.

[0019] The technical effects of the present invention include:

[0020] In the present invention, the cross arm can be adjusted axially during installation, so as to avoid wear of the cross arm body when the cross arm is subjected to force during use, effectively reduce the processing accuracy of the cross arm and the relevant position of the frame, and at the same time, the connection is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a mining dump truck in the present invention;

[0022] Figure 2 This is a diagram of the use state of the double wishbone suspension cross arm connecting device of a mining dump truck in the present invention;

[0023] Figure 3 yes Figure 2 Local cross-section along the AA direction;

[0024] Figure 4 yes Figure 3 A partial enlarged view of the middle K section;

[0025] Figure 5 It is a structural schematic diagram of the bushing in the present invention;

[0026] Figure 6 It is a structural schematic diagram of the thrust bearing in the present invention. DETAILED DESCRIPTION

[0027] The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce the invention.

[0028] like Figure 1 Shown is a schematic structural diagram of a mining dump truck according to the present invention.

[0029] The front wheels 3 and the cab of the dump truck 1 are mounted on the frame 2, and the front wheels 3 are located at the lower part of the cab.

[0030] like Figure 2 The figure shows the use state diagram of the double wishbone suspension wishbone connecting device of the mining dump truck in the present invention.

[0031] The double wishbone suspension 10 of a mining dump truck is used for the front suspension of the dump truck 1 and is located on both sides of the front part of the frame 2 . The double wishbone suspension 10 of the mining dump truck and the front wheels 3 on both sides of the dump truck 1 are completely the same structure.

[0032] The double wishbone suspension 10 of a mining dump truck includes: a steering knuckle 4, an upper spherical bearing 5, a lower spherical bearing 6, an upper wishbone 11, and a lower wishbone 12; the upper spherical bearing 5 and the lower spherical bearing 6 are respectively fixedly connected to the upper and lower ends of the steering knuckle 4, the upper wishbone 11 is connected to the upper spherical bearing 5 on one side of its lateral rotation, and the lower wishbone 12 is connected to the lower spherical bearing 6 on one side of its lateral rotation; a wishbone connecting device 100 is provided on one side of the upper wishbone 11 for longitudinal rotation, and is rotatably connected to the vehicle frame 2 through the wishbone connecting device 100; a wishbone connecting device 100 is provided on one side of the lower wishbone 12 for longitudinal rotation, and is rotatably connected to the vehicle frame 2 through the wishbone connecting device 100.

[0033] The front wheel 3 is fixedly connected to the side of the steering knuckle 4 in a rotatable manner. The upper cross arm 11 and the lower cross arm 12 are laterally provided with two coaxial ears 111 on the longitudinal rotation side, and the ears 111 are rotatably connected to the frame 2 by the cross arm connecting device 100. Through the interaction between the left and right sides of the upper cross arm 11 and the lower cross arm 12 and the cross arm connecting device 100 of the ears 111, the displacement of the upper cross arm 11 and the lower cross arm 12 is limited in the axial direction, and at the same time, the upper cross arm 11 and the lower cross arm 12 are connected to the frame 2 in a swinging manner.

[0034] The upper cross arm 11 and the lower cross arm 12 are connected to the frame 2 on one side of the support ear 111 by means of a cross arm connecting device 100 in a form that allows them to swing around the central axis X, and are connected to the upper spherical bearing 5 and the lower spherical bearing 6 on the other side in a rotatable manner.

[0035] Since the upper cross arm 11, the lower cross arm 12 and the vehicle frame 2 are connected in the same connection form, only the right side of the upper cross arm 11 is used as an example for detailed description. Hereinafter, the direction along the central axis X is referred to as the "axial direction", and the tangent direction of any point rotating around the central axis X is referred to as the "circumferential direction" or "circumferential direction". The direction intersecting the central axis X and perpendicular to the central axis X is referred to as the "radial direction".

[0036] like Figure 3 As shown, Figure 2 The local cross-section along the AA direction; Figure 4 As shown, Figure 3 A partial enlarged view of the middle K section.

[0037] In order to cooperate with the cross arm connecting device 100, the frame 2 is provided with a seat hole 2a in the axial direction, a threaded hole 2b is provided at the center of the seat hole 2a, a seat sleeve positioning hole is provided on the outside of the seat hole 2a, and the seat hole 2a is a countersunk hole. The support ear 111 is provided with a through hole 112 in the axial direction and a radial through hole 113 in the radial direction, and the radial through hole 113 and the through hole 112 are connected.

[0038] The cross arm connecting device 100 includes: a seat sleeve 101, a thrust bearing 103, a bushing 106, a pin 108, a bolt 109, and a pressure plate 116; the seat sleeve 101 is provided with a flange end face at the end, and the seat sleeve 101 is installed in the seat hole 2a; two thrust bearings 103 are respectively sleeved on the bushing 106 and located at both ends, one is located between the seat sleeve 101 and the support ear 111, and the other is located between the support ear 111 and the pressure plate 116; the bushing 106 is installed in the through hole 112, the pin 108 is sleeved in the seat sleeve 101 and the bushing 106, the left end face of the pin 108 is against the bottom surface of the seat hole 2a, and the pin 108 is axially provided with a through center hole at the center; the pressure plate 116 is located on the outside of the pin 108, and a pressure plate through hole is provided at the center; the bolt 109 passes through the pressure plate through hole and the center hole and is connected to the threaded hole 2b.

[0039] The flange end surface is provided with a seat cover fixing through hole, and the seat cover fixing pin 102 is inserted into the seat cover fixing through hole and the seat cover positioning hole.

[0040] The right end surface of the pin 108 is provided with a first pin countersink, the inner wall of the pressure plate 116 is provided with a second pin countersink, and the pin locating pin 110 is installed in the first pin countersink and the second pin countersink. The outer wall of the pin 108 and the seat sleeve 101 are interference fit. The outer wall of the pin 108 and the bushing 106 are clearance fit.

[0041] The outer circumferential surface of the seat sleeve 101 and the seat hole 2a are interference fit.

[0042] The first adjusting washer 104 is sleeved on the bushing 106 and is located between the thrust bearing 103 and the support ear 111 .

[0043] The second adjustment washer 115 is sleeved on the bolt 109 and is located between the pin 108 and the pressure plate 116. The second adjustment washer 115 is provided with a second washer through hole, and the pin locating pin 110 is installed in the first pin counterbore, the second washer through hole and the second pin counterbore.

[0044] The third adjusting gasket 114 is sleeved on the bolt 109 and is located between the pressure plate 116 and the end cap of the bolt 109 .

[0045] like Figure 5 , which is a schematic structural diagram of the bushing 106 in the present invention.

[0046] The outer wall of the bushing 106 is provided with an outer annular groove 106a along the circumferential direction, the inner wall is provided with an inner annular groove 106b along the circumferential direction, and the inner wall is provided with a plurality of through grooves 106d along the axial direction. The outer annular groove 106a and the inner annular groove 106b are connected through a plurality of evenly distributed radial through holes 106c; the through grooves 106d and the inner annular groove 106b intersect, and the radial through hole 106c is located between two adjacent through grooves 106d. The outer annular groove 106a is connected with the radial through hole 113.

[0047] The outer wall of the bushing 106 is in interference fit with the through hole 112 of the support ear 111. The outer annular groove 106a is aligned with the radial through hole 113 of the support ear 111.

[0048] like Figure 6 , which is a schematic structural diagram of the thrust bearing 103 in the present invention.

[0049] The thrust bearing 103 is provided with a bearing mounting hole and two bearing through holes 103a, the middle part of which is the bearing mounting hole, and the two bearing through holes 103a are located outside the bearing mounting hole; a side wall of the thrust bearing 103 is provided with a plurality of radial oil grooves 103b.

[0050] The centers of the two bearing through holes 103a are located on the same straight line.

[0051] The lug 111 is provided with lug counterbores on both side end surfaces, and the bearing locating pin 105 is inserted into the bearing through hole 103a and the lug counterbores, and the thrust bearing 103 is fixed to both sides of the lug 111 by the bearing locating pin 105. The radial oil groove 103b of the thrust bearing 103 on one side of the seat sleeve 101 faces the flange end surface of the seat sleeve 101, and the radial oil groove 103b of the thrust bearing 103 on one side of the pressure plate 116 faces the pressure plate 116.

[0052] The first adjustment gasket 104 is provided with two first gasket through holes, and the bearing positioning pin 105 is inserted into the bearing through hole 103a, the first gasket through hole, and the support ear countersunk hole.

[0053] By adjusting the number of the first adjustment washers 104, the positions of the upper cross arm 11, the lower cross arm 12 and the frame 2 relative to the frame 2 can be adjusted. By adjusting the number of the second adjustment washers 115, the axial position of the pressure plate 116 can be adjusted. When the upper cross arm 11 and the lower cross arm 12 are subjected to axial loads, the lugs 11 connecting the upper cross arm 11 and the lower cross arm 12 to the frame can withstand the axial load, further optimizing the stress state of the upper cross arm 11 and the lower cross arm 12.

[0054] The radial hole 113 of the lug 111 is connected to the lubricating oil pipe, and the radial hole 113 is in communication with the outer annular groove 106a on the outer wall of the bushing 106. Since the outer wall surface of the bushing 106 and the through hole 112 are interference fit, under the action of external pressure, the lubricating grease enters the outer annular groove 106a through the radial hole 113, and enters the inner annular groove 106b and the axial groove 106d through the radial through hole 106c, and then covers the entire inner wall surface of the bushing 106. An oil film is formed between the inner wall surface of the bushing 106 and the outer wall surface of the pin 108 to prevent the inner wall surface of the bushing 106 and the pin 108 from being worn.

[0055] The lubricating grease overflows to the left and right sides through the axial through groove 106d. Since the pin 108 and the seat sleeve 101 are interference fit, the lubricating grease overflowing from the bushing 106 accumulates and enters the radial oil groove 103b of the thrust bearing 103. The radial oil groove 103b covers the wall surface of the thrust bearing 103 to form an oil film, thereby preventing the thrust bearing 103 from wearing the flange end surface of the seat sleeve 101 and the pressure plate 116. The lubricating grease overflowing from the radial oil groove 103b of the thrust bearing 103 carries out the wear debris formed by internal wear, further reducing the wear of components.

[0056] With the continuous inflow of lubricating grease, the interior of the cross arm connection device 100 can always maintain fresh lubricating grease, and the oil film always exists on each contact surface, which fundamentally reduces the occurrence of wear and effectively extends the reliability of the cross arm.

[0057] According to the cross arm connection device of the above scheme, the upper cross arm 11 and the lower cross arm 12 can be adjusted axially during installation, so as to avoid wear of the cross arm body when the upper cross arm 11 and the lower cross arm 12 are subjected to force during use, effectively reducing the processing accuracy of the upper cross arm 11, the lower cross arm 12 and the frame 2. At the same time, the connection is reliable.

[0058] The method for using the double wishbone suspension wishbone connection device for a mining dump truck comprises the following steps:

[0059] 1. The frame 2 and the double wishbone suspension 10 of the mining dump truck are movably connected by using the wishbone connection device 100, and the double wishbone suspension 10 of the mining dump truck is rotatably connected to the front wheel 3;

[0060] The seat cover 101 is installed in the seat hole 2a of the frame 2, and the seat cover fixing pin 102 is inserted into the seat cover fixing through hole and the seat cover positioning hole to fix the position of the seat cover 101; the pin shaft 108 is inserted into the seat cover 101, and the bushing 106 is sleeved on the pin shaft 108; the bearing positioning pin 105 is inserted into the bearing through hole 103a, the first gasket through hole, and the support ear countersunk hole to fix the thrust bearing 103 on both sides of the support ear 111; the through hole 112 of the support ear 111 is sleeved on the bushing 106, and the bolt 109 passes through the pressure plate through hole and the center hole to be connected to the threaded hole 2b.

[0061] 2. Connect the lubricating oil pipe to the radial hole 113 of the support ear 111, and let the lubricating grease pass through the lubricating oil pipe. The lubricating grease enters the outer annular groove 106a through the radial hole 113, enters the inner annular groove 106b through the radial through hole 106c, and enters the axial groove 106d to form an oil film between the inner wall surface of the bushing 106 and the outer wall surface of the pin 108; the lubricating grease overflows to the left and right sides through the axial through groove 106d, and the pin 108 and the seat sleeve 101 are interference fit. The lubricating grease overflowing from the bushing 106 enters the radial oil groove 103b of the thrust bearing 103, and covers the wall surface of the thrust bearing 103 through the radial oil groove 103b.

[0062] The lubricating grease overflowing outward from the radial oil groove 103b of the thrust bearing 103 carries out the wear debris formed by the internal wear.

[0063] The terms used in the present invention are illustrative and exemplary, rather than restrictive. Since the present invention can be implemented in various 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 aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A double wishbone suspension cross arm connection device for a mining dump truck, characterized in that: include: Seat sleeve, thrust bearing, bushing, pin shaft, bolt, pressure plate; the seat sleeve is provided with a flange end face at the end portion for rotationally connecting the vehicle frame; two thrust bearings are respectively sleeved on the bushing and located at both ends, and the two thrust bearings are respectively opposite to the flange end face and the pressure plate; the thrust bearing is provided with a bearing mounting hole and two bearing through holes, the middle portion is a bearing mounting hole, and the two bearing through holes are located outside the bearing mounting hole; a plurality of radial oil grooves are provided on one side wall of the thrust bearing, and the thrust bearing is sleeved on the bushing using the bearing mounting hole; the radial oil groove of the thrust bearing on one side of the seat sleeve faces the flange end face of the seat sleeve, and the radial oil groove of the thrust bearing on one side of the pressure plate faces the pressure plate; the pin shaft is sleeved on the seat sleeve and bushing In the sleeve, the pin shaft is axially provided with a through center hole at the center; the pressure plate is located on the outside of the pin shaft, and a pressure plate through hole is provided at the center; the bolt is passed through the pressure plate through hole and the center hole; the first adjusting gasket is sleeved on the bushing, opposite to the thrust bearing position, the first adjusting gasket is provided with a first gasket through hole, and the bearing locating pin is inserted into the bearing through hole and the first gasket through hole; the right end face of the pin shaft is provided with a first pin shaft countersunk hole, the inner side wall of the pressure plate is provided with a second pin shaft countersunk hole, the second adjusting gasket is sleeved on the bolt, and is located between the pin shaft and the pressure plate, the second adjusting gasket is provided with a second gasket through hole, and the pin shaft locating pin is installed in the first pin shaft countersunk hole, the second gasket through hole and the second pin shaft countersunk hole.

2. The double wishbone suspension cross arm connection device for a mining dump truck according to claim 1, characterized in that: An outer annular groove is arranged on the outer wall of the bushing along the circumferential direction, an inner annular groove is arranged on the inner wall along the circumferential direction, and a plurality of through grooves are arranged on the inner wall along the axial direction. The outer annular groove and the inner annular groove are connected by a plurality of evenly distributed radial through holes; the through groove and the inner annular groove intersect, and the radial through hole is located between two adjacent through grooves.

3. The double wishbone suspension cross arm connection device for a mining dump truck as claimed in claim 2, characterized in that: The flange end surface is provided with a seat cover fixing through hole, and the seat cover fixing pin is plugged into the seat cover fixing through hole.

4. The double wishbone suspension cross arm connection device for a mining dump truck according to claim 1, characterized in that: The outer wall of the pin shaft and the seat sleeve are interference fit, and the outer wall of the pin shaft and the bushing are clearance fit.

5. A method for using the double wishbone suspension cross arm connection device for a mining dump truck as claimed in claim 3, characterized in that: include: The vehicle frame and the double wishbone suspension of the mining dump truck are movably connected by using a wishbone connecting device, and the double wishbone suspension of the mining dump truck is rotatably connected to the front wheel; The double wishbone suspension of a mining dump truck includes: a steering knuckle, an upper spherical bearing, a lower spherical bearing, an upper wishbone, and a lower wishbone; the upper spherical bearing and the lower spherical bearing are fixedly connected to the upper and lower ends of the steering knuckle respectively, the upper wishbone is connected to the upper spherical bearing on one side of lateral rotation, and the lower wishbone is connected to the lower spherical bearing on one side of lateral rotation; the upper wishbone and the lower wishbone are laterally provided with two coaxial lugs on one side of longitudinal rotation; the lugs are axially provided with through holes and radially provided with radial through holes, and the lugs are rotatably connected to the frame using a wishbone connection device; The frame is provided with a seat hole in the axial direction, a threaded hole is provided at the center of the seat hole, and a seat cover positioning hole is provided on the outer side of the seat hole; the seat cover is installed in the seat hole of the frame, and the seat cover fixing pin is inserted into the seat cover fixing through hole and the seat cover positioning hole to fix the seat cover position; the pin shaft is inserted into the seat cover, and the bushing is sleeved on the pin shaft; the bearing positioning pin is inserted into the bearing through hole and the support ear countersunk hole, and the thrust bearing is sleeved on the bushing using the bearing mounting hole to fix the thrust bearing on both sides of the support ear; the through hole of the support ear is sleeved on the bushing, and the bolt passes through the through hole of the pressure plate and the center hole to be connected to the threaded hole of the frame; Connect the lubricating oil pipe to the radial hole of the support ear, let the lubricating grease into the lubricating oil pipe, the lubricating grease enters the outer annular groove of the bushing through the radial hole, enters the inner annular groove through the radial through hole, and the lubricating grease enters the axial groove to form an oil film between the inner wall surface of the bushing and the outer wall surface of the pin shaft; the lubricating grease overflows to the left and right sides through the axial through groove, the pin shaft and the seat sleeve are interference fit, and the lubricating grease overflowing from the bushing enters the radial oil groove of the thrust bearing and covers the wall surface of the thrust bearing through the radial oil groove.

6. The method for using the double wishbone suspension cross arm connection device for a mining dump truck according to claim 5, characterized in that: The lubricating grease overflowing from the radial oil groove of the thrust bearing carries out the wear debris formed by internal wear.

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