Mine dump truck frame and connecting rod mechanism

Abstract

The utility model discloses a connecting rod structure, include: upper longitudinal connecting rod, lower longitudinal connecting rod, cross connecting rod, upper longitudinal connecting rod, lower longitudinal connecting rod are used to arrange in front bridge front part, and upper longitudinal connecting rod is located lower longitudinal connecting rod upper part, and the both ends of upper longitudinal connecting rod, lower longitudinal connecting rod are used for hinged car frame and front bridge respectively, and cross connecting rod is used to arrange in front bridge rear part one side, and the both ends of cross connecting rod are used for hinged car frame and front bridge respectively. The utility model discloses a mine dump truck frame. Through arranging connecting rod structure between car frame and front bridge, makes the posture of front bridge stable in the driving.

Description

Technical Field

[0001] This utility model relates to a mining dump truck, specifically to a mining dump truck frame and linkage mechanism. Background Technology

[0002] Mining dump trucks are large transport trucks used in open-pit mines to transport earth, rock, and mineral materials. They are heavy, have high load capacities, and operate in harsh environments with poor road conditions. The front axle of a mining dump truck simultaneously serves as a load-bearing, braking, steering, and traveling axle. The requirements for the front axle and its connecting structures are to maintain the stability and reliability of the dump truck even under such demanding operating conditions.

[0003] Non-independent front axles have good structural rigidity and strength, making them a feasible solution for mining dump trucks. However, the connection structure between the front axle and the chassis affects the stress and posture of the front axle during dump truck operation, and even the stability of the dump truck and the reliability of the entire vehicle.

[0004] The present invention aims to solve the technical problems existing in the above-mentioned situation. Utility Model Content

[0005] The purpose of this utility model is to provide a mining dump truck frame and linkage mechanism, which, by arranging a linkage mechanism between the frame and the front axle, keeps the front axle stable during driving.

[0006] To achieve the above objectives, the technical solution used in this utility model is as follows:

[0007] The linkage structure includes: an upper longitudinal link, a lower longitudinal link, and a transverse link. The upper and lower longitudinal links are arranged at the front of the front axle. The upper longitudinal link is located above the lower longitudinal link. The two ends of the upper and lower longitudinal links are used to articulate the frame and the front axle, respectively. The transverse link is arranged on one side of the rear of the front axle. The two ends of the transverse link are used to articulate the frame and the front axle, respectively.

[0008] Furthermore, it also includes: a front axle support and a frame support. The front axle support is used to connect the front axle, and the frame support is used to connect the frame. The upper longitudinal link, the lower longitudinal link, and the transverse link are hinged at both ends to the front axle support and the frame support, respectively.

[0009] Furthermore, the front axle support includes: a left longitudinal link support, a right longitudinal link support, and a second transverse link support; the frame support includes: a left front longitudinal link support, a right front longitudinal link support, and a first transverse link support; two sets of upper and lower longitudinal links are located on the left and right sides of the front axle, respectively; one end of the upper and lower longitudinal links is hinged to the left and right longitudinal link supports, and the other end is hinged to the left and right front longitudinal link supports, respectively; the two ends of the second transverse link support are hinged to the second transverse link support and the first transverse link support, respectively.

[0010] Furthermore, the upper longitudinal connecting rod has a first upper longitudinal connecting rod through hole and a second upper longitudinal connecting rod through hole at both ends; the inner wall of the first upper longitudinal connecting rod through hole has a third annular groove; the left and right longitudinal connecting rod supports each have an upper seat hole, and the upper seat hole has a fourth annular groove; the spherical bearing includes: an inner ring, an outer ring, a retaining ring, a limiting plate, and a limiting ring; the inner ring has an inner hole in the middle; the outer surface of the inner ring is spherical; the inner cavity of the outer ring is spherical; the outer ring is installed outside the inner ring; the outer ring is installed in the upper seat hole and the first upper longitudinal connecting rod through hole respectively; the retaining ring is installed in the third annular groove and the fourth annular groove respectively. Inside the groove; two eccentric pins are respectively inserted into the through hole of the second upper longitudinal connecting rod, the inner hole of the inner ring, the upper seat hole, and the inner hole of the inner ring; two limiting rings are respectively fitted on the two eccentric stepped pins, one limiting ring is located between the inner ring and the through hole of the second upper longitudinal connecting rod, and the other limiting ring is located between the inner ring and the upper seat hole, and the limiting plate is connected to the end face of the upper longitudinal connecting rod; the eccentric pin is a stepped cylinder, including: a head, an eccentric part, and a tail connected in sequence, the head and tail are located on the central axis of the pin, the eccentric part is located on the central axis of the eccentric part of the pin, and the eccentric part is fitted into the inner hole of the inner ring.

[0011] Furthermore, the head, tail, and second upper longitudinal connecting rod through holes are located on the same axis, the head, tail, and lower seat holes are located on the same axis, and the eccentric part and the inner hole of the inner ring are located on the same axis.

[0012] Furthermore, the outer diameters of the head, eccentric part, and tail decrease sequentially, forming a three-step shaft; the second upper longitudinal connecting rod through hole and the upper seat hole are stepped holes.

[0013] Furthermore, the head of the eccentric pin is provided with a first rectangular groove, and the limiting plate is welded into the first rectangular groove.

[0014] Furthermore, the lower longitudinal connecting rod has a first lower longitudinal connecting rod through hole and a second lower longitudinal connecting rod through hole at both ends, and the left and right longitudinal connecting rod supports each have a lower seat hole. The upper seat hole is located above the lower seat hole. The inner wall of the first lower longitudinal connecting rod through hole has a first annular groove, and the inner wall of the lower seat hole has a second annular groove. Two outer rings are respectively installed in the lower seat hole and the first lower longitudinal connecting rod through hole, and two stepped pins are respectively inserted into the inner hole of the inner ring, the second lower longitudinal connecting rod through hole, and the inner... Inside the inner hole of the ring and the lower seat hole; retaining rings are installed in the first annular groove and the second annular groove respectively; two limiting rings are respectively fitted on two stepped pins; one limiting ring is located between the inner ring and the second lower longitudinal connecting rod through hole, and the other limiting ring is located between the inner ring and the lower seat hole; the limiting plate is connected to the end face of the lower longitudinal connecting rod; the second lower longitudinal connecting rod through hole and the lower seat hole are stepped through holes; the stepped pin is a stepped cylinder; the two outer rings are respectively installed in the lower seat hole and the support lower seat hole.

[0015] The chassis of a mining dump truck includes: a chassis and a front axle, with a connecting rod structure articulating between the chassis and the front axle.

[0016] The technical effects of this utility model include:

[0017] The linkage mechanism based on the above scheme has a simple connection type and uniform force on the linkage, which keeps the front axle stable during driving, improving the driving stability of the dump truck and the reliability of the whole vehicle. Attached Figure Description

[0018] Figure 1 This is an isometric view of the installation positions of the front axle, suspension cylinder, connecting rod mechanism, and frame in this utility model;

[0019] Figure 2 This is a rear view of the front axle in this utility model;

[0020] Figure 3 yes Figure 2 AA direction view in the middle;

[0021] Figure 4 yes Figure 3 BB view in the middle;

[0022] Figure 5a yes Figure 4 Cross-sectional view along the EE direction;

[0023] Figure 5b yes Figure 4 Cross-sectional view along the FF direction;

[0024] Figure 6a yes Figure 4 Cross-sectional view along the HH direction;

[0025] Figure 6b yes Figure 4 Cross-sectional view along the GG direction;

[0026] Figure 7 yes Figure 3 Cross-sectional view of both ends of the middle cross link in the CC direction;

[0027] Figure 8a This is a schematic diagram of the upper longitudinal connecting rod in this utility model;

[0028] Figure 8b This is a schematic diagram of the lower longitudinal connecting rod in this utility model;

[0029] Figure 9 This is a schematic diagram of the cross link in this utility model;

[0030] Figure 10 This is a schematic diagram of the eccentric pin in this utility model.

[0031] Explanation of reference numerals in the attached figures

[0032] 1-Frame, 11-Left upper suspension cylinder support, 12-Right upper suspension cylinder support, 13-Left front longitudinal link support, 14-Right front longitudinal link support, 14a-Upper surface of support, 14b-Lower surface of support, 14c-Upper mounting hole, 14d-Lower mounting hole, 16-First transverse link support, 16a-Support surface, 16b-First mounting hole;

[0033] 2-Front axle, 21-Left lower suspension cylinder support, 22-Right lower suspension cylinder support, 23-Left longitudinal connecting rod support, 24-Right longitudinal connecting rod support, 24a-Upper seat hole, 24b-Lower seat hole, 26-Second transverse connecting rod support, 26a-Support surface, 26b-Second seat hole;

[0034] 300-linkage mechanism

[0035] 310 - Spherical plain bearing, 310a - Inner ring, 310b - Outer ring, 311 - Snap ring, 312 - Limiting plate, 313 - Limiting ring;

[0036] 314 - Eccentric pin, 314a - First rectangular groove A, 314b - Head outer peripheral surface, 314c - Eccentric part outer peripheral surface, 314d - Tail outer peripheral surface;

[0037] 315 - stepped pin, 315a - second rectangular groove, 315b - outer peripheral surface of the head, 315d - outer peripheral surface of the tail, 317 - bolt (fastening component);

[0038] 320 - Upper longitudinal connecting rod, 320a - Upper longitudinal connecting rod end face, 320b - First upper longitudinal connecting rod through hole, 320c - Second upper longitudinal connecting rod through hole;

[0039] 340-lower longitudinal connecting rod, 340a-end face of upper longitudinal connecting rod, 340a1-lower threaded hole, 340b-through hole of first lower longitudinal connecting rod, 340c-through hole of second lower longitudinal connecting rod;

[0040] 360 - Horizontal connecting rod, 360b - First horizontal connecting rod through hole, 360c - Second horizontal connecting rod through hole;

[0041] 4-Suspension cylinder;

[0042] Xbd - Center axis of the pin; Xc - Center axis of the eccentric portion of the pin.

[0043] Ob - First central axis, Oc - Second central axis. Detailed Implementation

[0044] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it.

[0045] In the following description, the direction along the central axis is called the axial direction, the tangent direction at any point rotating around the central axis is called the circumferential direction, the direction intersecting the central axis and perpendicular to the central axis is called the radial direction, the left side in the attached figure is called the left side, and the right side in the attached figure is called the right side.

[0046] like Figure 1 The figure shown is an isometric view of the installation positions of the front axle 2, suspension cylinder 4, connecting rod mechanism 300, and frame 1 in this utility model; as shown Figure 2 The image shown is a rear view of the front axle 2 in this utility model.

[0047] The frame 1 is supported on the front axle 2 on both the left and right sides by suspension cylinders 4. The two ends of the suspension cylinders 4 are hinged to the frame 1 and the front axle 2, respectively. The upper part of the left suspension cylinder 4 is hinged to the left side of the frame 1 via the upper left suspension cylinder support 11, and the upper part of the right suspension cylinder 4 is hinged to the right side of the frame 1 via the upper right suspension cylinder support 12. The lower part of the left suspension cylinder 4 is hinged to the left side of the front axle 2 via the lower left suspension cylinder support 21, and the lower part of the right suspension cylinder 4 is hinged to the right side of the front axle 2 via the lower right suspension cylinder support 22. The suspension cylinders 4 can extend and retract axially within a certain range, and restrict the movement of the front axle 2 from above.

[0048] The linkage mechanism 300 is located between the frame 1 and the front axle 2, and is a multi-link mechanism.

[0049] The arrangement of the linkage mechanism 300 includes:

[0050] Step 1: Install an upper longitudinal connecting rod 320 and a lower longitudinal connecting rod 340 on both sides of the front of the front axle 2. The upper longitudinal connecting rod 320 is located above the lower longitudinal connecting rod 340. The two ends of the upper longitudinal connecting rod 320 are hinged to the frame and the front axle 2, respectively. The two ends of the lower longitudinal connecting rod 340 are hinged to the frame and the front axle 2, respectively.

[0051] The upper longitudinal link 320 and the lower longitudinal link 340 are located in front of the front axle 2 and are symmetrically arranged along the left and right sides of the front axle 2, with one upper longitudinal link 320 and one lower longitudinal link 340 on each side. The upper longitudinal link 320 and the lower longitudinal link 340 are connected to the front axle support (left longitudinal link support 23, right longitudinal link support 24) and the frame support (left front longitudinal link support 13, right front longitudinal link support 14) in a rotatable manner by means of spherical bearings 310.

[0052] Step 2: Install a cross link 360 on one side of the rear of the front axle 2. The two ends of the cross link 360 are hinged to the frame and the front axle 2, respectively.

[0053] The lateral link 360 is located at the rear of the front axle 2 and is arranged along the left and right direction of the front axle. The lateral link 360 is connected to the front axle support (second lateral link support 26) and the frame support (first lateral link support 16) in a rotatable manner by means of a spherical bearing 310.

[0054] The linkage structure 300 includes: an upper longitudinal link 320, a lower longitudinal link 340, a transverse link 360, and a stepped pin 315, an eccentric stepped pin 314, a joint bearing 310, a limiting ring 313, a retaining ring 311, a limiting plate 312, a left front longitudinal link support 13, a right front longitudinal link support 14, a left longitudinal link support 23, and a right longitudinal link support 24 for hinge connection.

[0055] The left front longitudinal link support 13 and the right front longitudinal link support 14 have the same structure, and are respectively provided with an upper seat hole 14c and a lower seat hole 14d, with the upper seat hole 14c located above the lower seat hole 14d. The left longitudinal link support 23 and the right longitudinal link support 24 have the same structure.

[0056] refer to Figure 3-10 The installation and detailed structure of the linkage mechanism 300 are further described.

[0057] like Figure 3 As shown, is Figure 2 AA view in the middle.

[0058] The frame 1 is provided with a first transverse link support 16, and the first transverse link support 16 is provided with a first mounting hole 16b; a second transverse link support 26 is provided at the right rear of the front axle 2, and the second transverse link support 26 is provided with a second mounting hole 26b.

[0059] like Figure 9 The diagram shown is a structural schematic of the cross link 360 in this utility model.

[0060] The transverse link 360 is located at the right rear of the front axle 2 and is arranged along the left and right direction of the front axle 2. The two ends of the transverse link 360 are hinged to the frame 1 and the front axle 2 (first transverse link support 16 and second transverse link support 26).

[0061] The two ends of the horizontal connecting rod 360 are respectively provided with a first horizontal connecting rod through hole 360b and a second horizontal connecting rod through hole 360c.

[0062] like Figure 4 As shown, is Figure 3 BB-direction view in the middle; such as Figure 8a The diagram shown is a structural schematic of the upper longitudinal connecting rod 320 in this utility model; as shown... Figure 8b The figure shown is a structural schematic diagram of the lower longitudinal connecting rod 340 in this utility model.

[0063] The upper longitudinal link 320 and the lower longitudinal link 340 are located at the front of the front axle 2, and the two sets of upper longitudinal links 320 and lower longitudinal links 340 are located on the left and right sides of the front axle 2, respectively.

[0064] The upper longitudinal connecting rod 320 has a first upper longitudinal connecting rod through hole 320b and a second upper longitudinal connecting rod through hole 320c at both ends, and the end of the second upper longitudinal connecting rod through hole 320c is provided with an upper longitudinal connecting rod end face 320a.

[0065] The first upper longitudinal connecting rod through hole 320b is located on the first central axis Ob, and the second upper longitudinal connecting rod through hole 320c is located on the second central axis Ob.

[0066] The lower longitudinal connecting rod 340 has a first lower longitudinal connecting rod through hole 340b and a second lower longitudinal connecting rod through hole 340c at both ends. The end of the second lower longitudinal connecting rod through hole 340c has a lower longitudinal connecting rod end face 340a. The lower longitudinal connecting rod end face 340a has a threaded hole 340a1. The second lower longitudinal connecting rod through hole 340c of the lower longitudinal connecting rod 340 is a stepped hole.

[0067] The first lower longitudinal connecting rod through hole 340b is located on the first central axis Ob, and the second lower longitudinal connecting rod through hole 320c is located on the second central axis Ob.

[0068] The inner wall of the first lower longitudinal connecting rod through hole 340b is provided with a first annular groove.

[0069] like Figure 6a As shown, is Figure 4 A cross-sectional view along the HH direction, as shown below. Figure 6b As shown, is Figure 4 Cross-sectional view along the GG direction.

[0070] A right longitudinal connecting rod support 24 is provided on the right side of the front axle 2. The right longitudinal connecting rod support 24 is provided with an upper seat hole 24a and a lower seat hole 24b. The upper seat hole 24a is located above the lower seat hole 24b.

[0071] A second annular groove is provided on the inner wall of the lower seat hole 24b.

[0072] Since the longitudinal connecting rod supports (including: left longitudinal connecting rod support 23 and right longitudinal connecting rod support 24) have the same structure, and the longitudinal connecting rods (including: upper longitudinal connecting rod 320 and lower longitudinal connecting rod 340) are arranged symmetrically on the left and right sides and have the same connection structure, only the longitudinal connecting rod on the right side of the front axle 2 will be described.

[0073] The rear part of the lower longitudinal link 340 is hinged to the right longitudinal link support 24 (or the left longitudinal link support 23) of the front axle 2, and the front part of the lower longitudinal link 340 is hinged to the right front longitudinal link support 14 (or the left front longitudinal link support 13).

[0074] The lower seat hole 24b and the second lower longitudinal connecting rod through hole 340c are aligned, and the first lower longitudinal connecting rod through hole 340b and the lower seat hole 14d are aligned.

[0075] The spherical plain bearing 310 includes: an inner ring 310a, an outer ring 310b, a retaining ring 311, a limiting plate 312, and a limiting ring 313. The inner ring 310a has an inner hole in its center. The outer surface of the inner ring 310a is spherical, and the inner cavity of the outer ring 310b is spherical. The outer ring 310b is mounted outside the inner ring 310a of the spherical plain bearing. The retaining ring 311 and the limiting ring 313 are annular structures, with the retaining ring 311 having an open through groove. The limiting plate 312 has a limiting plate through hole.

[0076] Two outer rings 310b are respectively installed in the lower seat hole 24b and the first lower longitudinal connecting rod through hole 340b. Two stepped pins 315 are respectively inserted into the inner hole of the inner ring 310a, the second lower longitudinal connecting rod through hole 340c, the inner hole of the inner ring 310a, and the lower seat hole 14d. A retaining ring 311 is installed in the first annular groove and the second annular groove, respectively. Two limiting rings 313 are respectively fitted onto the two stepped pins 315. One limiting ring 313 is located between the inner ring 310a and the second lower longitudinal connecting rod through hole 340c, and the other limiting ring 313 is located between the inner ring 310a and the lower seat hole 14d. The positions of the inner ring 310a and the outer ring 310b are limited by the limiting rings 313 and the retaining rings 311. A limiting plate 312 is installed on the end face 340a of the lower longitudinal connecting rod, and a bolt 317 passes through the limiting plate through hole and connects to the lower threaded hole 340a1.

[0077] The two stepped pins 315 are located on the central axis Xbd of the pins.

[0078] A spherical plain bearing 310 is installed in the lower seat hole 24b of the right longitudinal connecting rod support 24. The outer ring 310b of the spherical plain bearing 310 is integrally fixed to the lower seat hole 24b by means of a retaining ring 311, thereby achieving axial positioning of the spherical plain bearing 310. A limit ring 313 is provided between the inner ring 310a of the spherical plain bearing 310 and the inner side of the lower longitudinal connecting rod 340. The stepped pin 315 is sequentially inserted into the second lower longitudinal connecting rod through hole 340c of the lower longitudinal connecting rod 340, the inner hole of the inner ring 310a of the spherical plain bearing, and the limit ring 313 until the stepped pin 315, the inner ring 310a of the spherical plain bearing, and the limit ring 313 are in complete axial contact.

[0079] The stepped pin 315 is a stepped cylinder composed of a head and a tail. The diameter of the outer circumferential surface 315b of the head is much larger than the diameter of the outer circumferential surface 315d of the tail. The axes of the outer circumferential surfaces 315b and 315d of the head and tail coincide, i.e., the central axis Xbd of the pin. The outer circumferential surfaces 315b of the head and 315d of the tail of the stepped pin 315 fit with the second lower longitudinal connecting rod through hole 340c of the lower longitudinal connecting rod 340, while the outer circumferential surface 315d of the tail fits with the inner hole of the inner ring 310a of the spherical bearing 310.

[0080] Similarly, the lower seat hole 14d of the right front longitudinal link support 14 of the frame 1 is a stepped hole. The outer peripheral surface 315b of the head and the outer peripheral surface 315d of the tail of the stepped pin 315 are fitted with the lower seat hole 14d of the right front longitudinal link support 14, and the outer peripheral surface 315d of the tail is fitted with the inner hole of the inner ring 310a.

[0081] The lower longitudinal connecting rod end surface 340a of the stepped pin 315 is provided with a second rectangular groove 315a. The limiting plate 312 is installed in the second rectangular groove 315a. The limiting plate 312 is integrally fixedly connected to the lower longitudinal connecting rod 340 by means of bolts 317, thereby realizing the axial and circumferential positioning of the stepped pin 315. Furthermore, it realizes the hinge connection between the lower longitudinal connecting rod 340 and the right longitudinal connecting rod support 24 and the right front longitudinal connecting rod support 14.

[0082] Similarly, the limiting plate 312 is integrally fixedly connected to the longitudinal connecting rod support 14 by means of the fastening member 317, realizing the axial and circumferential positioning of the stepped pin 315, and further realizing the axial positioning of the lower longitudinal connecting rod 340 relative to the longitudinal connecting rod support 14.

[0083] Since the inner ring 310a and outer ring 310b of the spherical bearing 310 can rotate relative to each other, the lower longitudinal link 340 can rotate relative to the right longitudinal link support 24 (or the left longitudinal link support 23) and the right front longitudinal link support 14 (or the left front longitudinal link support 13).

[0084] The first lower longitudinal connecting rod through hole 340b and the lower seat hole 24b are stepped through holes; a spherical bearing 310 is installed in the first lower longitudinal connecting rod through hole 340b of the lower longitudinal connecting rod support 340, and the outer ring 310b of the spherical bearing 310 is fixed integrally with the first lower longitudinal connecting rod through hole 340b by means of a retaining ring 311; thus, the spherical bearing 310 is positioned along the axial direction.

[0085] A limiting ring 313 is provided between the inner ring 310a of the spherical plain bearing 310 and the inner side of the longitudinal connecting rod support 14. The stepped pin 315 is inserted sequentially into the lower seat hole 14d of the longitudinal connecting rod support 14, the inner hole of the inner ring 310a of the spherical plain bearing 310, and the limiting ring 313 until the stepped pin 315, the inner ring 310a of the spherical plain bearing 310, and the limiting ring 313 are in complete axial contact.

[0086] like Figure 5a As shown, is Figure 4 Cross-sectional view along the EE direction; such as Figure 5b As shown, is Figure 4 Cross-sectional view along the FF direction.

[0087] refer to Figure 5a The section describes the end of the upper longitudinal connecting rod 320 that connects to the right longitudinal connecting rod support 24 of the front axle.

[0088] The inner wall of the first upper longitudinal connecting rod through hole 320b of the upper longitudinal connecting rod 320 is provided with a third annular groove, and a retaining ring 311 is installed in the third annular groove.

[0089] A spherical bearing 310 is installed in the upper seat hole 24a of the right longitudinal connecting rod support 24 of the front axle 2. The upper seat hole 24a is provided with a fourth annular groove, and the retaining ring 311 is installed with the fourth annular groove.

[0090] Two outer rings 310b are respectively installed in the upper seat hole 24a and the first upper longitudinal connecting rod through hole 320b. Two eccentric pins 314 are respectively inserted into the inner holes of the second upper longitudinal connecting rod through hole 320c, the inner ring 310a, the upper seat hole 14c, and the inner ring 310a. A retaining ring 311 is installed in the third and fourth annular grooves respectively. Two limiting rings 313 are respectively fitted onto the two eccentric stepped pins 314. One limiting ring 313 is located between the inner ring 310a and the second upper longitudinal connecting rod through hole 320c, and the other limiting ring 313 is located between the inner ring 310a and the upper seat hole 14c. The positions of the inner ring 310a and the outer ring 310b are limited by the limiting rings 313 and the retaining rings 311. A limiting plate 312 is connected to the end face 320a of the upper longitudinal connecting rod.

[0091] The outer ring 310b of the spherical plain bearing 310 is integrally fixed to the upper seat hole 24a by means of a retaining ring 311, thereby achieving axial positioning of the spherical plain bearing 310. A limit ring 313 is provided between the inner ring 310a of the spherical plain bearing and the inner side of the upper longitudinal connecting rod 320.

[0092] The eccentric pin 314 is inserted sequentially into the second upper longitudinal connecting rod through hole 320c, the inner hole of the inner ring 310a, and the limiting ring 313 of the upper longitudinal connecting rod 320, until the eccentric stepped pin 314, the inner ring 310a, and the limiting ring 313 are in complete contact along the axial direction.

[0093] The second upper longitudinal connecting rod through hole 320c of the upper longitudinal connecting rod 320 is a stepped hole.

[0094] like Figure 10 The diagram shown is a structural schematic of the eccentric pin 314 in this utility model.

[0095] The eccentric pin 314 is a stepped cylinder, consisting of a head, an eccentric portion, and a tail connected in sequence. The head and tail are located on the central axis Xbd of the pin, while the eccentric portion is located on the central axis Xc of the eccentric portion of the pin. The outer diameters of the head, eccentric portion, and tail decrease sequentially, forming a three-step pin.

[0096] The diameter of the outer peripheral surface 314b of the head is larger than the diameter of the eccentric outer peripheral surface 314c, and the diameter of the eccentric outer peripheral surface 314c is larger than the diameter of the outer peripheral surface 314d of the tail. The axes of the outer peripheral surface 314b of the head and the outer peripheral surface 314d of the tail coincide (located at the central axis Xbd of the pin). The axis of the eccentric outer peripheral surface 314c is located at the central axis Xc of the eccentric part of the pin. The central axis Xc of the eccentric part of the pin does not coincide with the central axis Xbd of the pin.

[0097] The head outer peripheral surface 314b and tail outer peripheral surface 314d of the eccentric stepped shaft 314 are fitted with the second upper longitudinal connecting rod through hole 320c, and the eccentric outer peripheral surface 314c of the eccentric part is fitted with the inner hole of the inner ring 310a of the spherical bearing 310.

[0098] The head of the eccentric pin 314 is provided with a first rectangular groove 314a, and the limiting plate 312 is installed in the first rectangular groove 314a.

[0099] Since the inner ring 310a and outer ring 310b of the spherical bearing 310 can rotate relative to each other, the upper longitudinal connecting rod 320 can rotate relative to the upper seat hole 24a of the right longitudinal connecting rod support 24 of the front axle 2.

[0100] refer to Figure 5b The end of the upper longitudinal link 320 that is connected to the right front longitudinal link support 14 of the frame will be described.

[0101] A spherical plain bearing 310 is installed in the first upper longitudinal connecting rod through hole 320b of the upper longitudinal connecting rod support 320. The outer ring 310b of the spherical plain bearing is integrally fixed to the first upper longitudinal connecting rod through hole 320b by means of a retaining ring 311, thereby achieving axial positioning of the spherical plain bearing 310. A limit ring 313 is provided between the inner ring 310a of the spherical plain bearing 310 and the inner side of the longitudinal connecting rod support 14. The eccentric pin 314 is sequentially inserted into the upper seat hole 14c of the longitudinal connecting rod support 14, the inner hole of the inner ring 310a, and the limit ring 313 until the eccentric stepped pin 314, the inner ring 310a of the spherical plain bearing, and the limit ring 313 are in complete axial contact.

[0102] The upper mounting hole 14c of the right front longitudinal link support 14 of the frame 1 is a stepped hole.

[0103] The outer peripheral surface 314b of the head and the outer peripheral surface 314d of the tail of the eccentric pin 314 are fitted with the upper seat hole 14c of the longitudinal connecting rod support 14, and the outer peripheral surface 314c of the eccentric part of the eccentric pin 314 is fitted with the inner hole of the inner ring 310a of the spherical bearing. The head of the eccentric pin 314 is provided with a first rectangular groove 314a, and the limiting plate 312 is installed in the first rectangular groove 314a.

[0104] Since the inner ring 310a and outer ring 310b of the spherical bearing 310 can rotate relative to each other, the upper longitudinal connecting rod 320 can rotate relative to the upper seat hole 14c of the longitudinal connecting rod support 14.

[0105] After the lower longitudinal tie rod 340 is installed, the upper longitudinal tie rod 320 is installed. By rotating the eccentric pin 314, the position of the first central axis Ob and the second central axis Oc of the holes at both ends of the upper longitudinal tie rod 320 (first upper longitudinal tie rod through hole 320b and second upper longitudinal tie rod through hole 320c) relative to the seat hole axis (upper seat hole 14c and upper seat hole 24a) of the front axle 2 and the frame 1 can be adjusted. This can effectively compensate for machining and assembly errors and improve the convenience and operability of installation.

[0106] After the upper longitudinal connecting rod 320 is installed, the limiting plate 312 used to limit the eccentric pin 314 is welded and integrally fixed to the end face 320a of the upper longitudinal connecting rod and the upper surface 14a of the support of the frame 1, thereby realizing the axial and circumferential positioning of the eccentric stepped pin 314.

[0107] The hole spacing of the through holes at both ends of the upper longitudinal connecting rod 320 (first upper longitudinal connecting rod through hole 320b, second upper longitudinal connecting rod through hole 320c) is equal to the hole spacing of the through holes at both ends of the lower longitudinal connecting rod 340 (first lower longitudinal connecting rod through hole 340b, second lower longitudinal connecting rod through hole 340c).

[0108] The hole spacing between the upper hole 24a and the lower hole 24b of the front axle longitudinal connecting rod support 24 is equal to the hole spacing between the upper hole 14c and the lower hole 14d of the right front longitudinal connecting rod support 14.

[0109] After the two lower longitudinal links 340 and the two upper longitudinal links 320 are installed, the transverse link 360 is installed. The transverse link 360 has the same connection structure as the frame 1 and the front axle 2, so the following explanation will only take the frame side as an example.

[0110] like Figure 7 As shown, is Figure 3 A cross-sectional view of both ends of the 360-degree cross link in the CC direction.

[0111] The end of the cross link 360 that is connected to the first cross link support 16 will be described.

[0112] A fifth annular groove is provided in the first horizontal connecting rod through hole 360b and the second horizontal connecting rod through hole 360c at both ends of the first horizontal connecting rod support 16, and a retaining ring 311 is installed in the fifth annular groove.

[0113] A spherical plain bearing 310 is installed in the first spherical plain bearing through hole 360b of the spherical plain bearing 360. The outer ring 310b of the spherical plain bearing 310 is integrally fixed to the first spherical plain bearing through hole 340b by means of a retaining ring 311, thereby achieving axial positioning of the spherical plain bearing 310. A limit ring 313 is provided between the inner ring 310a of the spherical plain bearing 310 and the inner side of the first spherical plain bearing support 16 of the frame 1.

[0114] The stepped pin 315 is inserted sequentially into the first seat hole 16b of the first cross link support 16, the inner hole of the inner ring 310a of the spherical bearing 310, and the limiting ring 313, until the stepped pin 315, the inner ring 310a, and the limiting ring 313 are in complete contact along the axial direction.

[0115] The first hole 16b of the first cross link support 16 is a stepped hole. Correspondingly, the second hole 26b of the second cross link support 26 is also a stepped hole.

[0116] The diameter of the outer peripheral surface 315b at the head of the stepped pin 315 is much larger than the diameter of the outer peripheral surface 315d at the tail. The axes of the outer peripheral surfaces 315b at the head and 315d at the tail coincide, i.e., they are located on the central axis Xbd of the pin. The outer peripheral surfaces 315b at the head and 315d at the tail of the stepped pin 315 fit with the first seat hole 16b of the first cross link support 16, and the outer peripheral surface 315d at the tail fits with the inner hole of the inner ring 310a of the spherical bearing 310.

[0117] The limiting plate 312 is installed in the second rectangular groove 315a. The limiting plate 312 is integrally fixed to the first horizontal connecting rod support 16 by means of bolts 317, thereby realizing the axial and circumferential positioning of the stepped pin 315.

[0118] Since the inner ring 310a and outer ring 310b of the spherical bearing 310 can rotate relative to each other, the cross link 360 can rotate relative to the first seat hole 16b of the first cross link support 16.

[0119] Since the connection types on both sides of the cross link 360 are exactly the same, the cross link 360 can rotate relative to the second seat hole 26b of the second cross link support 26.

[0120] <Limiting of front axle 2>

[0121] In summary, since the upper longitudinal link 320 and the lower longitudinal link 340 are connected to the supports of the front axle 2 and the frame 1 by spherical bearings 310, the longitudinal links (upper longitudinal link 320 and lower longitudinal link 340) can rotate relative to the pin and the fixed support. Furthermore, after the longitudinal links are installed, the upper longitudinal link 320, the lower longitudinal link 340 and the left longitudinal link support 23, or the upper longitudinal link 320, the lower longitudinal link 340 and the right longitudinal link support 24 form a parallelogram structure. Therefore, the longitudinal links only restrict the forward and backward movement of the front axle 2, but do not restrict the up and down or left and right movement of the front axle.

[0122] Similarly, the cross link 360 is connected to the front axle 2 and the frame 1 using a spherical bearing 310. The cross link 360 can rotate relative to the stepped pin 315 and the fixed support. Therefore, the cross link 360 only restricts the left and right movement of the front axle 2, but does not restrict the front axle 2's front-back or up-down movement.

[0123] As can be seen from the above description, the front axle 2, under the combined action of the longitudinal connecting rods (upper longitudinal connecting rod 320, lower longitudinal connecting rod 340) and the transverse connecting rod 360, only has movement in the vertical direction.

[0124] As described above, suspension cylinders 4 are installed on both sides of the front axle 2 between it and the frame 1. Both suspension cylinders 4 are connected to the frame suspension cylinder supports (upper left suspension cylinder support 11, upper right suspension cylinder support 12) and the front axle suspension cylinder supports (left longitudinal connecting rod support 23, right longitudinal connecting rod support 24) in a manner that allows them to rotate around the connecting central axis. The suspension cylinders 4 can extend and retract axially within a certain range, thus limiting the vertical movement range of the front axle. Combined with the shock absorption and damping effects of the suspension cylinders 4, the front axle 2 remains in the correct position during operation. Furthermore, all connections are flexible, avoiding direct impact from loads, improving comfort while ensuring the reliability of the frame, front axle, and all connecting components.

[0125] According to the above scheme, the linkage mechanism 300 of the front axle 2 has a simple connection type and uniform force on the linkage, which makes the front axle 2 stable in posture and reliable during driving.

[0126] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied 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 foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A linkage structure, characterized in that, include: The upper longitudinal link, lower longitudinal link, and transverse link are arranged at the front of the front axle. The upper longitudinal link is located above the lower longitudinal link. The two ends of the upper and lower longitudinal links are used to articulate the frame and the front axle, respectively. The transverse link is arranged on one side of the rear of the front axle. The two ends of the transverse link are used to articulate the frame and the front axle, respectively.

2. The linkage structure as described in claim 1, characterized in that, Also includes: The front axle support and the frame support are used to connect the front axle and the frame support. The upper longitudinal link, the lower longitudinal link, and the transverse link are hinged at both ends to the front axle support and the frame support, respectively.

3. The linkage structure as described in claim 2, characterized in that, The front axle support includes: a left longitudinal link support, a right longitudinal link support, and a second transverse link support. The frame support includes: a left front longitudinal link support, a right front longitudinal link support, and a first transverse link support. Two sets of upper and lower longitudinal links are located on the left and right sides of the front axle, respectively. One end of the upper and lower longitudinal links and the transverse links are hinged to the left and right longitudinal link supports, and the other end is hinged to the left and right front longitudinal link supports. The two ends of the second transverse link support are hinged to the second transverse link support and the first transverse link support, respectively.

4. The linkage structure as described in claim 3, characterized in that, The upper longitudinal connecting rod has a first upper longitudinal connecting rod through hole and a second upper longitudinal connecting rod through hole at both ends, respectively; the inner wall of the first upper longitudinal connecting rod through hole has a third annular groove. The left and right longitudinal connecting rod supports each have an upper seat hole, and the upper seat hole has a fourth annular groove. The spherical bearing includes: an inner ring, an outer ring, a retaining ring, a limiting plate, and a limiting ring. The inner ring has an inner hole in the middle, and the outer surface of the inner ring is spherical. The inner cavity of the outer ring is spherical, and the outer ring is installed outside the inner ring. The outer ring is installed in the upper seat hole and the first upper longitudinal connecting rod through hole, respectively, and the retaining ring is installed in the third annular groove and the fourth annular groove, respectively. Two eccentric pins are respectively inserted into the through hole of the second upper longitudinal connecting rod, the inner hole of the inner ring, the upper seat hole, and the inner hole of the inner ring; two limiting rings are respectively fitted on the two eccentric stepped pins, one limiting ring is located between the inner ring and the through hole of the second upper longitudinal connecting rod, and the other limiting ring is located between the inner ring and the upper seat hole, and the limiting plate is connected to the end face of the upper longitudinal connecting rod; the eccentric pin is a stepped cylinder, including: a head, an eccentric part, and a tail connected in sequence, the head and tail are located on the central axis of the pin, the eccentric part is located on the central axis of the eccentric part of the pin, and the eccentric part is fitted into the inner hole of the inner ring.

5. The linkage structure as described in claim 4, characterized in that, The head, tail, and second upper longitudinal connecting rod through holes are located on the same axis; the head, tail, and lower seat holes are located on the same axis; and the eccentric part and the inner hole of the inner ring are located on the same axis.

6. The linkage structure as described in claim 4, characterized in that, The outer diameter of the head, eccentric part, and tail decreases sequentially, forming a three-step shaft; the second upper longitudinal connecting rod through hole and the upper seat hole are stepped holes.

7. The linkage structure as described in claim 4, characterized in that, The head of the eccentric pin is provided with a first rectangular groove, and the limiting plate is welded into the first rectangular groove.

8. The linkage structure as described in claim 3, characterized in that, The lower longitudinal connecting rod has a first lower longitudinal connecting rod through hole and a second lower longitudinal connecting rod through hole at both ends, respectively. The left and right longitudinal connecting rod supports each have a lower seat hole, and the upper seat hole is located above the lower seat hole. The inner wall of the first lower longitudinal connecting rod through hole has a first annular groove, and the inner wall of the lower seat hole has a second annular groove. Two outer rings are respectively installed in the lower seat hole and the first lower longitudinal connecting rod through hole. Two stepped pins pass through the inner hole of the inner ring, the second lower longitudinal connecting rod through hole, and the inner ring, respectively. Inside the inner hole and the lower seat hole; retaining rings are installed in the first annular groove and the second annular groove respectively; two limiting rings are respectively fitted on two stepped pins; one limiting ring is located between the inner ring and the second lower longitudinal connecting rod through hole, and the other limiting ring is located between the inner ring and the lower seat hole; the limiting plate is connected to the end face of the lower longitudinal connecting rod; the second lower longitudinal connecting rod through hole and the lower seat hole are stepped through holes; the stepped pin is a stepped cylinder; the two outer rings are respectively installed in the lower seat hole and the support lower seat hole.

9. A mining dump truck frame, comprising: A chassis and a front axle, characterized in that a linkage structure as described in any one of claims 1-8 is hinged between the chassis and the front axle.

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