An assembly method for a mining dump truck axle

Abstract

The present invention belongs to the technical field of engineering machinery manufacturing, and is particularly suitable for the assembly of axles of three-bridge mining dump trucks. Specifically, it is a method for assembling axles of mining dump trucks, which includes the following steps: a frame and a linkage AGV assembly line are composed of multiple AGVs; the AGV supports the frame and transfers it to the storage rack in turn to perform the preliminary assembly work for the installation of the axle; after the frame AGV assembly line is assembled, the AGV supports the frame and transfers it to the linkage AGV assembly line; in the linkage AGV assembly line, the AGV supports the frame and circulates it to complete the assembly of the axle assembly and the frame; the assembled frame assembly is transferred to the general assembly line, and the axle assembly operation is completed. Through the assembly method of the present invention, the overturning of the frame before and after assembly can be avoided, and the assembly efficiency and safety can be significantly improved. At the same time, the axle is assembled by jacking, which greatly reduces the vehicle occupation and solves the problem of limited production capacity due to vehicle occupation. The present invention can be extended to the application in the axle assembly process of most three-bridge mining dump trucks.

Description

Technical Field

[0001] The invention belongs to the technical field of construction machinery manufacturing, and is particularly applicable to the axle assembly of three-axle mining dump trucks. Specifically, it is an assembly method for the axles of mining dump trucks. Background Art

[0002] The mining dump truck involved in the invention is a three-axle mining truck, which includes three types of axles: the front axle, the middle axle, and the rear axle. The axles are located at the bottom of the vehicle frame and are connected to the vehicle frame through devices such as pin shafts, connecting rods, and oil cylinders. Due to the heavy weight of the axles, a traveling crane is required for operation during the sub-assembly, transfer, and final assembly processes. Limited by the layout and travel of the traveling crane, the assembly time for a single-position axle is relatively long. The traditional assembly plan is multi-position assembly, which occupies a large amount of space and consumes a long time. To solve the problems of low assembly efficiency, large space occupation, and long traveling crane occupation time for the axles of mining dump trucks, an axle assembly production line needs to be designed. Summary of the Invention

[0003] The purpose of the invention is to provide an assembly method for the axles of mining dump trucks, which adopts an AGV-based production line. Through the AGV intelligent control system, partial processes are automated or semi-automated, significantly reducing the hoisting man-hours of the traveling crane and remarkably improving the assembly efficiency.

[0004] To achieve the above purpose, the invention adopts the following technical solutions:

[0005] An assembly method for the axles of mining dump trucks, characterized in that it includes the following steps:

[0006] a) An assembly production line is composed of multiple AGVs, which is divided into a vehicle frame AGV production line and a linkage AGV production line;

[0007] b) Buttons are set on the assembly production line, and a vehicle frame storage rack is set on the vehicle frame AGV production line;

[0008] c) On the vehicle frame AGV production line, the AGV supports and transfers the vehicle frame in sequence; when reaching the work station, the vehicle frame is transferred to the storage rack for pre-assembly work before axle installation;

[0009] d) After the assembly on the vehicle frame AGV production line is completed, the AGV supports and transfers the vehicle frame to the linkage AGV production line;

[0010] e) On the linkage AGV production line, the AGV supports and transfers the vehicle frame to complete the assembly of the axle assembly and the vehicle frame;

[0011] f) The assembled vehicle frame assembly is transferred to the final assembly line, and the axle assembly operation is completed.

[0012] Furthermore, in step a, the AGV is divided into a frame AGV, an axle AGV, and a linkage AGV, wherein the linkage AGV is divided into a front linkage AGV and a rear linkage AGV; the assembly line has a total of seven stations, stations one to four are frame AGV lines, and stations five to seven are linkage AGV lines.

[0013] Furthermore, in step b, the storage rack is divided into a front storage rack and a rear storage rack, the front storage rack is supported on the front bumper of the frame, and the rear storage rack is supported on the frame tie rod support, and the storage rack is fixed to the ground by chemical bolts.

[0014] Furthermore, the step c is specifically as follows: the frame AGV supports the frame to be transferred between workstations one to four through the frame AGV lifting platform, and places it on the storage rack for assembly operations. After completion, a button is pressed, and the frame AGV starts to drive into the bottom of the frame, automatically lifts the frame AGV lifting platform and supports the frame to separate from the storage rack, drives into the next workstation, and places the frame on the storage rack of the next workstation for assembly operations; this is repeated to complete the assembly operations from workstations two to four.

[0015] Furthermore, the step d is specifically as follows: after the assembly operation at station four is completed, the frame AGV supports the frame and moves it to station five. After the linkage AGV at station five is in place, the frame is transferred to the linkage AGV, and the frame AGV returns to the frame AGV assembly line.

[0016] Furthermore, the step e is specifically as follows: the linkage AGV sends an in-place information after arriving at workstation five, the axle AGV automatically supports the axle assembly to travel to the bottom of the frame, the axle AGV lifting platform lifts the axle assembly and connects it to the frame, and after assembly is completed, the axle AGV returns to the storage position of the axle assembly, and the linkage AGV supports the frame to move to the next workstation.

[0017] Furthermore, the steps d and c may also be:

[0018] d) After the assembly operation at station 4 is completed, the frame AGV supports frame 1 and moves it to any idle station from station 5 to station 7. After the linkage AGV is in place, the frame is transferred to the linkage AGV, and the frame AGV returns to the frame AGV assembly line;

[0019] e) After the linkage AGV is in place, it sends the in-place information, the axle AGV automatically supports the axle assembly and drives it to the bottom of the frame, the axle AGV lifting platform lifts the axle assembly and connects it to the frame, after the assembly is completed, the axle AGV returns to the storage position of the axle assembly, the linkage AGV supports the frame and circulates it in the uninstalled workstation, and installs the axle assembly in sequence.

[0020] Furthermore, in step d, the front linkage AGV support frame of the linkage AGV is supported at the frame bumper, and the front linkage AGV support frame is an upright structure, and the bottom is fixed to the front linkage AGV with bolts.

[0021] Furthermore, in step d, the rear linkage AGV support frame of the linkage AGV is connected to the rear ear seat of the frame through a pin shaft, the bracket is a rotating structure, and the bottom is fixed to the rear linkage AGV with bolts. The bracket base has a limit block, and the angle between the rotating arm and the horizontal plane is 60-110 degrees.

[0022] Furthermore, in step e, the linked AGV supports the frame to install the axle assembly at the front axle position at station five. After completion, the linked AGV supports the frame and moves it to station six to install the axle assembly at the rear axle position. After completion, the linked AGV supports the frame and moves it to station seven to install the axle assembly at the middle axle position. At this point, the installation of the frame and the axle assembly is completed, the lifting frame is separated from the linked AGV, and the linked AGV moves back to station five.

[0023] Furthermore, the AGV is charged online after exiting, and the charging method is ground charging.

[0024] The assembly method of the mining dump truck axle proposed by the present invention uses a lifting frame AGV, a lifting axle AGV, a frame-bearing linkage AGV, a dispatching management system, system peripheral equipment and other devices to form an AGV-type mining dump truck axle assembly line. The present invention realizes the forward placement of the frame, the axle enters from the bottom of the frame and is connected to the frame, which saves the frame flipping process before and after assembly, greatly improves assembly efficiency and safety, and at the same time, the axle is assembled by jacking, which reduces the driving occupation of the assembly process, and effectively solves the problem of wasted waiting time for driving.

[0025] The assembly method of the present invention can avoid the frame from turning over before and after assembly, which can significantly improve assembly efficiency and safety. At the same time, the jacking method is used to assemble the axle, which greatly reduces the vehicle occupation and solves the problem of limited production capacity due to vehicle occupation. The present invention can be extended to the axle assembly process of most three-axle mining dump trucks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the layout of the axle assembly line of the present invention.

[0027] Figure 2 It is a schematic diagram of the frame AGV of the present invention.

[0028] Figure 3 It is a schematic diagram of the rear linkage AGV of the present invention.

[0029] Figure 4Schematic diagram of the front linkage AGV of the present invention.

[0030] Figure 5 Schematic diagram of the axle AGV of the present invention.

[0031] In the figure, 1 is the vehicle frame, 2 is the vehicle frame AGV, 3 is the axle assembly, 4 is the rear linkage AGV, 5 is the front linkage AGV, 6 is the axle AGV, 7 is the vehicle frame AGV lifting platform, 8 is the rear linkage AGV support frame, 9 is the front linkage AGV support frame, and 10 is the axle AGV lifting platform. Detailed implementation manners

[0032] To make the objectives, effects, and technical solutions of the embodiments of the present invention clearer, the technical solutions in the implementation cases will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention but not to limit the scope of the present invention.

[0033] The present invention supports and lifts the vehicle frame 1 and the axle assembly 3 through AGVs to form an assembly line for the forward assembly of the vehicle frame. The axle enters from the bottom of the vehicle frame and is connected to the vehicle frame. It is not necessary to flip the front and rear vehicle frames during the assembly process, and it is not necessary to use a traveling crane for hoisting during the connection process between the axle and the vehicle frame.

[0034] Embodiment 1:

[0035] As Figures 1 to 5 described, an assembly method for the axle of a mining dump truck, and the assembly method is as follows:

[0036] a) The assembly line has a total of 7 stations and consists of 9 AGVs and their auxiliary devices. Among them: 1 8-ton lifting AGV, named vehicle frame AGV 2; 2 3-ton lifting AGVs, named axle AGV 6; 6 15-ton double-linkage load-bearing AGVs, with every two double-linkage load-bearing AGVs as a group, named linkage AGV, divided into front linkage AGV 5 and rear linkage AGV 4. The 3 groups of linkage AGVs are located at stations five to seven and circulate between stations five to seven.

[0037] b) Call / complete wireless buttons are set at all 7 stations, and vehicle frame storage racks are set at stations one to four; the storage racks are divided into front and rear storage racks. The front storage rack is supported at the front bumper of the vehicle frame, and the rear storage rack is supported at the tie rod support of the vehicle frame. The storage racks are fixed to the ground with chemical bolts.

[0038] c) Workstations 1 to 4 form a frame AGV assembly line. The frame AGV 2 supports and transfers the frame 1 through the frame AGV lifting platform 7 among workstations 1 to 4. Workers use a crane or forklift to hoist the frame 1 to Workstation 1 and place it on the storage rack, then carry out the assembly operation. After completion, the worker presses the completion button, and the frame AGV 2 starts and automatically drives into the bottom of the frame 1 along the magnetic strip, automatically raises the frame AGV lifting platform 7 and supports the frame 1, causing the frame 1 to separate from the storage rack. Then the frame AGV 2 drives into the next workstation along the magnetic strip, lands the frame 1 after aligning with the support surface of the storage rack and completes the work; repeat this step to complete the assembly operations at Workstations 2 to 4; install the frame components at Workstations 1 to 4 to carry out the preliminary assembly work for the installation of the axle assembly 3.

[0039] d) Workstations 5 to 7 form a linkage AGV assembly line. The linkage AGV supports and transfers the frame 1 among workstations 5 to 7. After the assembly operation at Workstation 4 is completed, the frame AGV 2 supports the frame 1 and moves it to Workstation 5. After the linkage AGV at Workstation 5 arrives, it sends the arrival information to the frame AGV 2 through the wireless module. The frame AGV lifting platform 7 descends, and the worker respectively suspends the front and rear lugs of the frame 1 by the front linkage AGV support frame 9 and the rear linkage AGV support frame 8. The frame AGV lifting platform 7 descends to the bottom and returns; at this time, the frame 1 is supported by the front linkage AGV 5 and the rear linkage AGV 4 of the linkage AGV. The front linkage AGV support frame 9 supports at the bumper of the frame 1. The front linkage AGV support frame 9 is an upright structure and is fixed to the front AGV with bolts at the bottom. The rear linkage AGV support frame 8 is connected to the ear seat at the tail of the frame through a pin shaft. The rear linkage AGV support frame 8 is a rotating structure and is fixed to the rear AGV with bolts at the bottom. The bracket base has a limit block, and the angle between the rotating arm and the horizontal plane is 60 - 110 degrees.

[0040] e) After the linkage AGV completes assembly at workstations five to seven, the completion button is manually pressed, the linkage AGV starts, and drives along the magnetic strip to the next workstation. The workstation flow sequence is a five-six-seven-five cycle. After the linkage AGV drives to its position, it sends the in-position information to the central control. After the axle AGV 6 receives the central control information, it automatically supports the axle assembly 3 and drives along the magnetic strip to the bottom of the frame 1. After confirming that the axle AGV 6 has arrived, the axle AGV lifting platform button is manually operated. The axle AGV lifting platform 10 slides along the X and Y directions and moves in the Z direction to lift it to the axle installation position. After the axle assembly 3 arrives at the axle installation position, the connecting rod of the axle assembly 3 is connected to the frame 1. After the assembly is completed, the axle AGV lifting platform 10 descends and returns to the storage position of the axle assembly 3. The linkage AGV supports the frame 1 and moves it to the next workstation. Specifically, the linkage AGV supports the frame 1 to install the axle assembly 3 at the front axle position at station five. After completion, the linkage AGV supports the frame 1 and moves it to station six to install the axle assembly 3 at the rear axle position. After completion, the linkage AGV supports the frame 1 and moves it to station seven to install the axle assembly 3 at the middle axle position. At this point, the installation of the frame 1 and the axle assembly 3 is completed, the lifting frame 1 is separated from the linkage AGV, and the linkage AGV moves back to station five.

[0041] f) The frame assembly is manually hoisted to the final assembly line using a large crane, and the axle assembly operation is completed.

[0042] Embodiment 2:

[0043] The order of steps af and the operation methods of steps ac and f are the same as those of the first embodiment, except that:

[0044] Step d) After the assembly operation at station 4 is completed, the frame AGV 2 supports the frame 1 and moves it to any idle station from station 5 to station 7. After the linkage AGV is in place, the frame 1 is transferred to the linkage AGV, and the frame AGV 2 returns to the frame AGV assembly line;

[0045] Step e) works in the same manner as in the first embodiment, the linkage AGV supports the frame 1 and circulates in the uninstalled stations, and the axle assembly 3 is installed in sequence.

[0046] In steps d and e, in order to achieve maximum efficiency, it is optimal for workstations five to seven to be completed simultaneously, and the three groups of linked AGVs complete the work simultaneously.

[0047] After the frame AGV, axle AGV and linkage AGV exit, they are charged online. The charging method is ground charging, which can maximize the working time of the AGV.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications, combinations, and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. An assembly method for a mine dump truck axle, characterized in that: It includes the following steps: a) An assembly line composed of multiple AGVs is divided into a frame AGV line and an interlocking AGV line; the AGVs are divided into frame AGVs, axle AGVs, and interlocking AGVs, and the interlocking AGVs are divided into front interlocking AGVs and rear interlocking AGVs; the assembly line has a total of seven workstations, with workstations one to four being the frame AGV line and workstations five to seven being the interlocking AGV line; b) Buttons are set up on the assembly line, and a frame storage rack is set up on the frame AGV line; c) On the frame AGV line, the AGV supports and transfers the frame in sequence; when it reaches the workstation, it transfers the frame to the storage rack and performs pre-assembly work for axle installation; the frame AGV supports the frame through the frame AGV lifting platform and transfers it between workstations one to four, and places it on the storage rack for assembly operations. After completion, press the button, and the frame AGV starts to drive under the frame, automatically raises the frame AGV lifting platform and supports the frame to break away from the storage rack, drives into the next workstation, and places the frame on the storage rack of the next workstation for assembly operations; repeat this to complete the assembly operations at workstations two to four; d) After the frame AGV line completes the assembly, the AGV supports and transfers the frame to the interlocking AGV line; e) On the interlocking AGV line, the AGV supports and transfers the frame to complete the assembly of the axle assembly and the frame; f) Transfer the assembled frame assembly to the general assembly line to complete the axle assembly operation.

2. The assembly method of a mining dump truck axle according to claim 1, characterized in that: In step b, the storage rack is divided into a front storage rack and a rear storage rack. The front storage rack supports at the front bumper of the frame, and the rear storage rack supports at the frame tie rod support. The storage rack is fixed to the ground by chemical bolts.

3. The assembly method of an axle for a mining dump truck according to claim 1, characterized in that: Step d is specifically as follows: After the assembly operation at workstation four is completed, the frame AGV supports the frame and moves it to workstation five. After the interlocking AGV at workstation five arrives, it transfers the frame to the interlocking AGV, and the frame AGV returns to the frame AGV line.

4. The assembly method of a mine dump truck axle according to claim 1, characterized in that: Step e is specifically as follows: After the interlocking AGV arrives at workstation five, it sends an in-place message. The axle AGV automatically supports the axle assembly and drives to the bottom of the frame. The axle AGV lifting platform raises the axle assembly to connect with the frame. After completion of the assembly, the axle AGV returns to the storage position of the axle assembly, and the interlocking AGV supports the frame and moves it to the next workstation.

5. The assembly method of an axle for a mining dump truck according to claim 1, characterized in that: Steps d and e are: d) After the assembly operation at workstation four is completed, the frame AGV supports the frame 1 and moves it to any idle workstation from workstations five to seven. After the interlocking AGV arrives, it transfers the frame to the interlocking AGV, and the frame AGV returns to the frame AGV line; e) After the interlocking AGV arrives, it sends an in-place message. The axle AGV automatically supports the axle assembly and drives to the bottom of the frame. The axle AGV lifting platform raises the axle assembly to connect with the frame. After completion of the assembly, the axle AGV returns to the storage position of the axle assembly, and the interlocking AGV supports the frame and circulates at the unassembled workstations to sequentially install the axle assemblies.

6. The assembly method of an axle for a mining dump truck according to claim 3, characterized in that: In step d, the front interlocking AGV support frame of the interlocking AGV supports at the frame bumper. The front interlocking AGV support frame is an upright structure and is fixed to the front interlocking AGV at the bottom with bolts.

7. The assembly method of an axle for a mining dump truck according to claim 3, characterized in that: In step d, the rear linkage AGV support frame of the linkage AGV is connected to the rear ear seat of the frame through a pin shaft. The bracket is a rotating structure, and the bottom is fixed to the rear linkage AGV with bolts. The bracket base has a limit block, and the angle between the rotating arm and the horizontal plane is 60-110 degrees.

8. The assembly method of a mine dump truck axle according to claim 4, characterized in that: In step e, the linked AGV supports the frame to install the axle assembly at the front axle position at station five. After completion, the linked AGV supports the frame and moves it to station six to install the axle assembly at the rear axle position. After completion, the linked AGV supports the frame and moves it to station seven to install the axle assembly at the middle axle position. At this point, the installation of the frame and the axle assembly is completed, the lifting frame is separated from the linked AGV, and the linked AGV moves back to station five.

9. The assembly method of an axle for a mining dump truck according to claim 1, characterized in that: After the AGV exits, it is charged online, and the charging method is ground charging.

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