Large-tonnage electric drive wheel type bulldozer working device

Abstract

The large-tonnage electrically-driven wheel type bulldozer working device comprises a front frame, a push arm cross beam and a push shovel, the two ends of the push arm cross beam are connected with the push shovel through push arms, the push arm cross beam is of a three-section solid splicing structure, cross beam flanges are welded to the two ends of the middle section, and the cross beam flanges are connected with push arm cross beam side rods of the two side sections through bolts. A push arm cross beam ball head is arranged on the outer side of the push arm cross beam side rod and is used for mounting a push arm; front frame stand columns with holes are arranged on the two sides of the front frame, the middle section of the push arm cross beam penetrates through the holes and is welded to the holes of the front frame stand columns through connecting plates, and meanwhile the two side sections of the push arm cross beam are connected to the two sides of the front frame in a reinforced mode through push arm transverse pull rods. The three-section split type push arm cross beam is high in strength, enough balance weight can be provided for a whole vehicle, machining and transporting difficulties caused by an overlarge structure can be avoided, meanwhile, an upper-layer structure and a lower-layer structure are arranged in the front vehicle frame, arrangement of internal modules and pipelines can be facilitated, a maintenance opening is provided, and later maintenance is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of wheel bulldozer frame design, in particular to a working device of a large-tonnage electrically driven wheel bulldozer. Background Art

[0002] As an important equipment in modern earthwork engineering and mining, large-tonnage electric-driven wheeled bulldozers have a larger machine weight and higher engine power than ordinary-tonnage wheeled bulldozers. These features enable large-tonnage bulldozers to cope with more complex and difficult working conditions. However, large-tonnage bulldozers need to withstand extremely high loads during operation, especially under eccentric load and maximum traction conditions, and the frame structure needs to withstand extremely high stress. Therefore, higher strength and stability requirements are placed on the working devices including the front frame, push arm crossbeam, push arm, etc.

[0003] The working device is the main operating and stress-bearing structure of the bulldozer. In order to ensure the stability and balance of the bulldozer during operation, the working device needs to take into account the strength and rigidity requirements during design. At the same time, it also needs to have sufficient counterweight to prevent the bulldozer from tilting during bulldozing operations.

[0004] In addition, due to the large size of large-tonnage wheeled bulldozers, transportation and on-site assembly are also important factors that need to be considered during design. Manufacturers usually disassemble them into parts for transportation and then assemble them at the work site. However, even the disassembled parts are large in size and weight, which brings additional difficulties to transportation and on-site assembly. Therefore, when designing the working device, it is necessary to consider the disassembly method of the parts, the convenience of transportation, and the operability of repairing and maintaining the internal parts after assembly. Summary of the invention

[0005] Purpose of the invention: The purpose of the invention is to provide a large-tonnage electric-driven wheel bulldozer working device with high strength, good stability, and easy transportation and maintenance.

[0006] Technical solution: To achieve the above-mentioned purpose, a large-tonnage electric-driven wheel bulldozer working device described in the present invention includes a front frame, a push arm crossbeam, and a bulldozer. The two ends of the push arm crossbeam are connected to the bulldozer through a push arm. The push arm crossbeam is a three-section splicing structure. The middle section of the push arm crossbeam passes through the front frame and is fixed on the front frame. The two side sections of the push arm crossbeam are reinforced and connected to the two sides of the front frame through push arm cross tie rods.

[0007] Among them, the push arm crossbeam is a solid structure, and crossbeam flanges are welded at both ends of the main rod of the middle section push arm crossbeam. The crossbeam flanges are connected to the side rods of the push arm crossbeam on both sides by bolts. A push arm crossbeam ball head is provided on the outer side of the push arm crossbeam side rod for installing the push arm.

[0008] The rear end of the push arm is sleeved on the ball head of the push arm cross beam, and the front end of the push arm is installed on the push arm mounting seat of the push shovel through a push arm universal joint.

[0009] Among them, the main body of the push arm is connected to a tilt cylinder by a pin shaft, and the other end of the tilt cylinder is connected to the tilt cylinder mounting seat of the push shovel through a joint bearing. The extension line of the central axis of the mounting hole of the tilt cylinder mounting seat intersects with the extension line of the central axis of the mounting hole of the push arm mounting seat.

[0010] Wherein, a connecting pin is provided at the connection between the push arm cross beam main rod and the push arm cross beam side rod.

[0011] Wherein, the front frame includes two groups of front frame columns, and the front frame columns are provided with holes for passing the push arm cross beam, and the middle section of the push arm cross beam is welded at the hole through a connecting plate.

[0012] Among them, a lower panel, a middle partition and an upper panel are welded between the two groups of front frame columns, a front axle housing is welded at the front ends of the two groups of front frame columns through a front support frame, and maintenance openings are provided on the lower panel and the upper panel for easy access to the interior of the front frame.

[0013] The front support frame is a box-type structure welded by a ball head mounting plate, a stabilizer bar ball head, a front panel, and a front support plate. A maintenance port is provided between the ball head mounting plate and the front panel to facilitate maintenance of the internal components of the front axle housing.

[0014] Among them, a cylinder pin mounting seat is welded above the front support plate, and the lifting cylinder pin mounting seat adopts a pin shaft to connect the lifting cylinder mounting pin for installing the lifting cylinder, and the other end of the lifting cylinder is connected to the dozer through a lifting cylinder universal joint.

[0015] Wherein, a stabilizer bar is additionally provided between the front frame and the dozer blade, and two ends of the stabilizer bar are respectively connected to the front frame and the dozer blade through a stabilizer bar ball head I and a stabilizer bar ball head II.

[0016] Beneficial effects: The present invention has the following advantages: 1. The push arm cross beam is a three-section splicing structure with high strength. The entire structure passes through the front frame, which can provide sufficient counterweight for the vehicle and avoid processing and transportation difficulties caused by an overly large structure;

[0017] 2. The middle part of the push arm cross beam is welded to the front frame through a connecting plate to avoid the problem of difficult position matching between the front bracket and the push arm cross beam due to processing errors, thereby reducing the difficulty of assembly and improving assembly efficiency and structural stability;

[0018] 3. The middle section and the two side sections of the push arm cross beam are connected by connecting pins and flanges, which enhances the overall structural strength of the push arm cross beam. In addition, a push arm cross beam tie rod is added between the front frame and the push arm cross beam, which improves the reliability of the connection between the push arm cross beam and the front frame and ensures the stable operating performance of the bulldozer under complex working conditions.

[0019] 4. The upper and lower layers of the front frame are convenient for the layout of internal modules and pipelines, and provide two different installation and maintenance methods: maintenance at the top of the front frame and maintenance at the bottom of the front frame. The pedals and frame handrails protect the personnel on the top of the frame. The front support frame is connected to the front axle housing and is designed with a maintenance port to facilitate maintenance of the drive motor.

[0020] 5. The extension line of the center axis of the push arm mounting seat mounting hole I intersects vertically with the extension line of the center axis of the tilt cylinder mounting seat mounting hole II, thereby preventing the tilt cylinder from axial movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the working device structure;

[0022] Figure 2 It is a schematic diagram of the front frame structure;

[0023] Figure 3 It is a schematic diagram of the push arm crossbeam structure;

[0024] Figure 4 It is a schematic diagram of the bulldozer structure;

[0025] Among them, 1 front frame, 2 push arm cross beam, 3 push arm cross beam tie rod, 4 mudguard, 5 push arm, 6 tilt cylinder, 7 push blade, 8 stabilizer bar, 9 lifting cylinder, 10 lifting cylinder mounting pin, 11 frame handrail and pedal;

[0026] 1.1 frame hinge, 1.2 front frame column, 1.3 connecting plate, 1.4 lower panel, 1.5 front axle housing, 1.6 front support frame, 1.7 middle partition, 1.8 upper panel, 1.6.1 ball head mounting plate, 1.6.2 stabilizer bar ball head I, 1.6.3 front panel, 1.6.4 front support plate, 1.6.5 lifting cylinder pin mounting seat;

[0027] 2.1 Middle push arm cross beam, 2.2 Connecting pin, 2.3 Push arm cross beams on both sides, 2.4 Push arm ball head, 2.5 Bolt;

[0028] 7.1 Pushing blade body, 7.2 Lifting cylinder universal joint, 7.3 Stabilizer bar ball joint II, 7.4 Push arm universal joint, 7.5 Push arm mounting seat, 7.6 Tilt cylinder mounting seat. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below in conjunction with the embodiments and drawings.

[0030] like Figure 1 As shown, the working device of the present invention includes a front frame 1, a push arm cross beam 2, a push arm 5, and a push shovel 7. The push arm cross beam 2 passes through the front frame 1 and is welded to both sides of the front frame 1 into a whole. Both ends of the push arm cross beam 2 are connected to the push shovel 7 through the push arm 5.

[0031] like Figure 2 As shown, the front frame 1 includes a frame hinge 1.1 that can be welded into a whole, a front frame column 1.2, a connecting plate 1.3, a lower panel 1.4, a front axle housing 1.5, a front support frame 1.6, a middle partition 1.7, and an upper panel 1.8.

[0032] The lower panel 1.4, the middle partition 1.7 and the upper panel 1.8 are located between the two front frame pillars 1.2, dividing the interior of the front frame 1 into two layers, the upper and lower layers. The pipelines inside the front frame can be arranged in the upper layer or the lower layer inside the front frame according to actual needs. A maintenance hole is designed between the lower panel 1.4 and the upper panel 1.8. When repairing the upper pipeline of the front frame 1, the maintenance personnel enter the upper layer of the front frame 1 through the maintenance hole of the upper panel 1.8. When repairing the lower pipeline of the front frame, the maintenance personnel enter the lower layer of the front frame through the maintenance hole of the lower panel 1.4. The double-layer design inside the front frame is convenient for the arrangement and maintenance of the pipelines.

[0033] The front frame column 1.2 is provided with a hole for passing the push arm cross beam 2, and the push arm cross beam 2 is welded to the hole through the connecting plate 1.3. That is, the inner circle of the connecting plate 1.3 is welded to the push arm cross beam 2, and the outer circle of the connecting plate 1.3 is welded to the front frame column 1.2.

[0034] The design of the welding structure prevents the problem that when the push arm cross beam 2 is directly welded to the front frame column 1.2, it is difficult to ensure the relative position of the push arm cross beam 2 and the front frame 1 due to processing errors, which makes assembly difficult. Therefore, the front frame column 1.2 is provided with an outer ring whose diameter is larger than the push arm cross beam 2 for passing through the hole, so that the push arm cross beam 2 can pass through smoothly and be spliced ​​in place. During actual assembly, the push arm cross beam 2 is first spliced ​​to the front frame column 1.2 through the connecting plate 1.3, and then the connecting plate 1.3 is welded to the front frame column 1.2 and the push arm cross beam 2 respectively.

[0035] The front support frame 1.6 of the front frame 1 is welded to the front axle housing 1.5. The front support frame 1.6 is a box-shaped structure welded by a ball head mounting plate 1.6.1, a stabilizer bar ball head 1.6.2, a front panel 1.6.3, a front support plate 1.6.4 and a lifting cylinder pin mounting seat 1.6.5 to further increase its structural strength. A maintenance port for repairing the drive motor is provided between the ball head mounting plate 1.6.1 and the front panel 1.6.3, which is convenient for repairing the internal components of the front axle housing 1.5. The front support frames 1.6 are provided on both sides with front support plates 1.6.4, and the lifting cylinder pin mounting seat 1.6.5 is provided above the front support plates 1.6.4. The lifting cylinder pin mounting seat 1.6.5 is connected to the lifting cylinder mounting pin 10 by a pin shaft.

[0036] The front axle housing 1.5 is used to install the drive motor and wheel hub rim, and is equipped with heat dissipation ports to dissipate heat through heat pipes.

[0037] The lifting cylinder mounting pin 10 is divided into an insert shaft, a shaft cover and a shaft sleeve. The shaft sleeve is fixed to the insert shaft by a fixing pin to prevent the shaft sleeve from displacement. The shaft cover and the insert shaft are fixed by bolts. There is a lubrication hole for filling grease on the top of the shaft cover. The lifting cylinder 9 is installed in the middle of the insert shaft.

[0038] The lifting cylinder mounting pin 10 is connected to the lifting cylinder 9 by a pin, and the other end of the lifting cylinder 9 is connected to the dozer 7 through the lifting cylinder universal joint 7.2. The lifting cylinder 9 is used to control the up and down displacement of the dozer 7. A stabilizer bar 8 is also connected between the front frame 1 and the dozer 7 through the stabilizer bar ball head I1.62 and the stabilizer bar ball head II7.3 to limit the swing amplitude of the dozer 7.

[0039] The push arm cross beam 2 is the main load-bearing member of the front frame 1. It is not only used to support the dozer 7, but also serves as a counterweight for the front frame 1. Therefore, it needs to have a large weight to prevent the front frame from tilting due to insufficient counterweight when the dozer 7 is in operation. The push arm cross beam 2 is a long strip as a whole, and has a long length. It not only runs through the front frame 1, but also protrudes from the wheel position at both ends. In order to ensure that the push arm cross beam 2 has sufficient weight and strength, and is easy to transport and process, and can also disperse the stress during the operation and improve fatigue strength, the push arm cross beam 2 is a solid structure and is cast in three sections.

[0040] like Figure 3 As shown, the push arm cross beam 2 includes a push arm cross beam main rod 2.1, a connecting pin 2.2, a push arm cross beam side rod 2.3, and a push arm ball head 2.4. The push arm cross beam main rod 2.1 is welded with a cross beam flange at both ends, and the cross beam flange is connected to the push arm cross beam side rod 2.3 through a bolt 2.5. A connecting pin 2.2 is provided at the connection to withstand the shear force at the connection between the push arm cross beam main rod 2.1 and the push arm cross beam side rod 2.3 during operation. A push arm cross beam ball head 2.4 is provided on the outside of the push arm cross beam side rod 2.3 for installing the push arm 5.

[0041] Because the push arm cross beam 2 has a large weight, in order to enhance the stability and support force of the overall structure, the push arm cross beam side rods 2.3 on both sides thereof need to be additionally reinforced. A push arm cross beam tie rod 3 is additionally provided between the push arm cross beam side rod 2.3 and the front frame column 1.2 on the same side.

[0042] The front frame 1 not only provides structural support through the front frame columns 1.2 located on both sides, but is further welded with wheel fenders 4. A frame handrail and a pedal 11 are welded above the front frame 1 to protect the operator.

[0043] like Figure 4 As shown, the rear end of the push arm 5 is sleeved on the push arm cross beam ball head 2.4, and the front end is connected to the push shovel 7 through a push arm universal joint 7.4. The push arm universal joint 7.4 is fixed to the push shovel 7 through a push arm mounting seat 7.5. The push arm mounting seat 7.5 includes two groups of ears I, and the ears I are provided with mounting holes I. The push arm universal joint 7.4 is fixed at the mounting hole I and can rotate around the central axis of the mounting hole I.

[0044] The main body of the push arm 5 is connected to the tilt cylinder 6 by a pin shaft, and the other end of the tilt cylinder 6 is connected to the tilt cylinder mounting seat 7.6 of the push shovel 7 through a joint bearing. The tilt cylinder 6 is used to control the pitch and left and right tilt of the push shovel 7. During the movement of the push shovel, the tilt cylinder 6 will tilt at a certain angle relative to the push shovel 7, so the joint bearing can provide a certain angle deviation between the tilt cylinder 6 and the tilt cylinder mounting seat 7.6 to compensate for the angle tilt during the movement. The tilt cylinder mounting seat 7.6 also includes two sets of lugs II, and the lugs II are provided with mounting holes II. The joint bearings corresponding to the tilt cylinder 6 are fixed at the mounting holes II and can rotate around the central axis of the mounting holes II.

[0045] During the movement of the push shovel, the push arm universal joint 7.4 will rotate slightly around the axial direction of the push arm mounting seat 7.5 mounting hole I. When there is a certain deviation between the axial direction of the push arm mounting seat 7.5 mounting hole I and the central axis of the tilt cylinder mounting seat 7.6 mounting hole II, the tilt cylinder 6 will not only tilt at a certain angle with the push shovel 7, but also cause a certain axial movement of the tilt cylinder 6, resulting in additional friction, which seriously affects the life of the pin and other structural parts. Therefore, the extension line of the central axis of the push arm mounting seat 7.5 mounting hole I should be perpendicular to the extension line of the central axis of the tilt cylinder mounting seat 7.6 mounting hole II, so as to avoid axial movement of the tilt cylinder 6.

[0046] The above working device can be used for large-tonnage electric-driven wheel bulldozers. The three-section split push arm crossbeam structure can not only provide sufficient counterweight for the vehicle, but also avoid processing and transportation difficulties caused by the oversized structure. The reliability of the connection is ensured by the joint action of the fixing pin, the push arm crossbeam tie rod and the bolt. The upper and lower layers of the front frame are convenient for the layout of internal modules and pipelines, and provide two different installation and maintenance methods: maintenance at the top of the front frame and maintenance at the bottom of the front frame. The pedals and frame handrails play a role in protecting personnel on the top of the frame. The front mounting frame is connected to the front axle housing and is designed with a maintenance port for repairing the drive motor.

Claims

1. A working device of a large-tonnage electric-driven wheel bulldozer, comprising a front frame (1), a push arm cross beam (2), and a push blade (7), wherein both ends of the push arm cross beam (2) are connected to the push blade (7) through push arms (5), and characterized in that: The push arm cross beam (2) is a three-section spliced ​​structure, the middle section of the push arm cross beam (2) passes through the front frame (1) and is fixed on the front frame (1), and the two side sections of the push arm cross beam (2) are reinforced and connected to the two sides of the front frame (1) through push arm cross tie rods (3).

2. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 1, characterized in that: The push arm cross beam (2) is a solid structure. The two ends of the push arm cross beam main rod (2.1) in the middle section are welded with cross beam flanges. The cross beam flanges are connected to the push arm cross beam side rods (2.3) on both sides by bolts. The push arm cross beam side rods (2.3) are provided with push arm cross beam ball heads (2.4) on the outside for installing the push arm (5).

3. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 2 is characterized in that: The rear end of the push arm (5) is sleeved on the push arm cross beam ball head (2.4), and the front end of the push arm (5) is mounted on the push arm mounting seat (7.5) of the push shovel (7) through a push arm universal joint (7.4).

4. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 3 is characterized in that: The main body of the push arm (5) is connected to a tilting cylinder (6) by a pin shaft, and the other end of the tilting cylinder (6) is connected to a tilting cylinder mounting seat (7.6) of a push shovel (7) by a joint bearing, and an extension line of a central axis of a mounting hole of the tilting cylinder mounting seat (7.6) intersects with an extension line of a central axis of a mounting hole of a push arm mounting seat (7.5).

5. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 2, characterized in that: A connecting pin (2.2) is provided at the connection between the push arm cross beam main rod (2.1) and the push arm cross beam side rod (2.3).

6. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 1, characterized in that: The front frame (1) comprises two groups of front frame uprights (1.2), and the front frame uprights (1.2) are provided with holes for passing the push arm cross beam (2), and the middle section of the push arm cross beam (2) is welded to the hole through a connecting plate 1.

3.

7. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 6, characterized in that: A lower panel (1.4), a middle partition (1.7) and an upper panel (1.8) are welded between two groups of front frame columns (1.2); a front axle housing (1.5) is welded to the front ends of the two groups of front frame columns (1.2) via a front support frame (1.6); and maintenance openings are provided on the lower panel (1.4) and the upper panel (1.8) for facilitating access to the interior of the front frame (1).

8. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 7, characterized in that: The front support frame (1.6) is a box-shaped structure formed by welding a ball head mounting plate (1.6.1), a stabilizer bar ball head (1.6.2), a front panel (1.6.3), and a front support plate (1.6.4). A maintenance port for facilitating maintenance of internal components of the front axle housing (1.5) is provided between the ball head mounting plate (1.6.1) and the front panel (1.6.3).

9. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 8, characterized in that: A cylinder pin mounting seat (1.6.5) is welded above the front support plate (1.6.4), and the lifting cylinder pin mounting seat (1.6.5) is connected to a lifting cylinder mounting pin (10) for mounting a lifting cylinder (9) by a pin shaft, and the other end of the lifting cylinder (9) is connected to the dozer (7) via a lifting cylinder universal joint (7.2).

10. The working device of the large-tonnage electrically driven wheel bulldozer according to claim 1, characterized in that: A stabilizing bar (8) is additionally provided between the front vehicle frame (1) and the dozer blade (7), and two ends of the stabilizing bar (8) are respectively connected to the front vehicle frame (1) and the dozer blade (7) via a stabilizing bar ball head I (1.62) and a stabilizing bar ball head II (7.3).

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