A power assembly shock absorber dismounting device, dismounting method and mining dump truck

Abstract

The application discloses a power assembly shock absorber dismounting device and method and a mine dump truck, which comprises a power support seat, a shock absorber and an auxiliary device; the power support seat, the shock absorber and the auxiliary device are symmetrically arranged between a vehicle frame and a power assembly. One side of the power support seat is fixedly connected with the vehicle frame through welding, and the other side is connected with a power sub-frame through bolt cooperation; the shock absorber is installed between the power support seat and the power sub-frame, and is used for reducing vibration generated during engine operation and impact generated during installation of the power assembly; the auxiliary device comprises a power slide rail seat and a power guide rail seat; the power slide rail seat is installed on the power sub-frame, and the power guide rail seat is welded on the vehicle frame and used for supporting the power assembly on the vehicle frame and enabling the power assembly to directionally slide during hoisting of the power assembly. The application has the advantages of convenient shock absorber maintenance and easy dismounting.

Description

Technical Field

[0001] This invention relates to an engine shock absorber disassembly and assembly device, belonging to the field of mining machinery. Background Technology

[0002] Mining dump trucks with a capacity of 100 tons or more often assemble the generator, engine, and radiator into an independent powertrain via a power subframe. Multiple support brackets and shock absorbers are used to mount this powertrain onto the frame, allowing for easy disassembly, assembly, and maintenance of the entire powertrain. Shock absorbers are prone to damage, and their replacement frequency is higher than that of engine overhauls.

[0003] The existing structure typically involves welding a support shaft onto the engine subframe and then mounting the shock absorber onto the subframe support shaft. Considering the compact layout of the frame longitudinal beams and the powertrain, as well as the front-rear relative position of the frame gantry beam and the engine, it is difficult to remove or hammer the shock absorber. The powertrain must be slid off the frame for shock absorber removal and installation. Due to the front-rear relative position of the frame gantry beam and the lifting point, the lifting rope is blocked when passing through the gantry beam, requiring the lifting rope to be disassembled and the lifting position changed. This operation is complicated, laborious, and time-consuming. Summary of the Invention

[0004] This invention provides an engine shock absorber disassembly and assembly device, which has the advantages of convenient shock absorber maintenance and easy disassembly and assembly.

[0005] To achieve the above objectives, the present invention is implemented according to the following technical solution: The first aspect of this invention discloses a powertrain shock absorber disassembly and assembly device, comprising: The power support mount is fixedly connected to the vehicle frame on one side and detachably connected to the power subframe on the other. Shock absorbers are installed between the power support and the power subframe to reduce vibrations generated during engine operation and impacts generated during powertrain installation. The auxiliary device, one part of which is installed on the power subframe and the other part on the chassis, is used to support the powertrain on the chassis when hoisting it, so that the power support seat with the shock absorber is detached from the power subframe and a height difference is created between them in the vertical direction, ensuring the stability of the powertrain when the shock absorber is disassembled and installed.

[0006] In some embodiments, the power support, shock absorber, and auxiliary devices are symmetrically arranged between the vehicle frame and the powertrain.

[0007] In some embodiments, the power support base includes: The power rear seat is a one-piece cast steel component with a cylindrical mounting hole at the front end and a welding surface machined at the rear end, which is welded to the vehicle frame. The power support shaft has a long shaft end at one end and a short shaft end at the other end. The long shaft end passes through the cylindrical mounting hole and is welded and fixed to both ends of the cylindrical mounting hole. The shock absorber is fitted onto the short shaft end, and the short shaft end and the shock absorber are installed with a clearance fit.

[0008] In some embodiments, the power subframe is equipped with a shaft hole seat consisting of two semicircular seats connected by bolts; one semicircular seat is fixed to the power subframe, and a shock absorber fitted on the power support seat is inserted into the shaft hole seat; the shock absorber is separated from the power subframe by removing the other semicircular seat.

[0009] In some embodiments, the auxiliary device can also enable the powertrain supported on the frame to be directionally moved relative to the frame, thereby completing the disassembly and installation of the powertrain.

[0010] In some embodiments, the auxiliary device includes a power slide rail seat mounted on the power subframe and a power guide rail seat mounted on the frame; during the installation and removal of the shock absorber, the power slide rail seat sits on the power guide rail seat, supporting the powertrain on the frame; during the installation and removal of the powertrain, the power slide rail seat rolls directionally on the power guide rail seat, causing the powertrain to slide smoothly relative to the frame.

[0011] In some embodiments, the power guide rail base includes a front plate, an upper plate, a lower plate, and a rear plate; the upper plate and the lower plate are welded together at their outer edges along the vehicle frame direction, and the upper plate and the lower plate are welded to the inner side of the vehicle frame without contacting each other at their inner edges along the vehicle frame direction; the rear plate is a triangular plate, which is welded together with the side of the vehicle frame, the rear edge of the upper plate, and the rear edge of the lower plate; the front plate is welded together with the side of the vehicle frame, the front edge of the upper plate, and the front edge of the lower plate.

[0012] In some embodiments, the upper edge of the front plate is higher than the surface of the upper plate, reducing the risk that the entire powertrain will slide off the front end of the frame during sliding.

[0013] In some embodiments, the power slide rail base includes: Roller bearings, which are rolled and supported on the power guide seat; The slide rail bracket is connected at its bottom to the power subframe and at its top to the roller bearing. The movement of the roller bearing drives the powertrain to slide relative to the frame.

[0014] In some embodiments, the slide rail bracket includes: The bearing column has a retaining ring groove on its front end and a circumferential step at a predetermined inward distance from this end. The mounting plate has its top fixed to the rear end of the bearing column and several mounting holes at the bottom for mounting the power slide rail seat on the power subframe with fastening components. The roller bearing includes: A shaft elastic retaining ring is provided with a pair of clamp holes to expand the shaft elastic retaining ring and place it into the bearing post retaining ring groove; A circular track is a ring with a certain thickness, with a retaining groove at one end of the inner ring and a circumferential step at the other end. A retaining ring for holes is provided with a pair of clamping holes to clamp the retaining ring for holes and place it into the groove of the circular rail retaining ring. A cylindrical roller bearing is mounted on the bearing column, and the cylindrical roller bearing is axially limited on the bearing column by a shaft elastic retaining ring and a step around the bearing column; a circular rail is mounted on the cylindrical roller bearing, and the circular rail is restricted on the cylindrical roller bearing by a hole elastic retaining ring and a step around the circular rail, and drives the circular rail to roll.

[0015] In some embodiments, the power subframe is equipped with a front lifting point in front of the gantry beam and a rear lifting point behind the gantry beam; the power slide rail is mounted on the power subframe behind the gantry beam, the rear end of the power slide rail is disposed on the frame behind the gantry beam, and the front end of the power slide rail is disposed on the frame in front of the gantry beam. After the power slide rail slides on the power slide rail, the rear end of the powertrain can pass through the gantry beam, so that the lifting rope can be connected to the rear lifting point to remove the powertrain from the frame.

[0016] In some embodiments, two front-to-back power slide rail seats are provided on each side of the power subframe, one of which is located at the rear end of the power subframe and the other is located on the power subframe below the gantry beam; during the installation and removal of the shock absorber, the front power slide rail seat sits on the power guide rail seat; during the installation and removal of the powertrain, the front power slide rail seat first rolls on the power guide rail seat, and then the rear power slide rail seat rolls together with the front power slide rail seat on the power guide rail seat.

[0017] The second aspect of the present invention discloses a mining dump truck, including a frame and an independent powertrain assembled from a generator, an engine and a radiator via a power subframe, wherein the aforementioned powertrain shock absorber removal and installation device is installed between the frame and the power subframe.

[0018] The third aspect of this invention discloses a method for disassembling and assembling a powertrain shock absorber. During disassembly and installation, the powertrain is first lifted upwards using ropes via the front and rear lifting points on the power subframe, causing the power slide rail mounted on the power subframe to rest on the power guide rail seat mounted on the frame. Next, the power support seat, fixed to the frame and equipped with the shock absorber, detaches from the power subframe, creating a vertical height difference. Finally, the shock absorber is disassembled by pulling it from the lower end of the power subframe towards the inner side of the frame using disassembly and assembly tools, or installed by tapping it.

[0019] In some embodiments, the power slide rail has rolling characteristics, enabling it to roll directionally on the power guide rail, thereby driving the powertrain to slide smoothly relative to the frame, allowing the tail end of the powertrain to pass through the gantry beam, so that the lifting rope can be connected to the rear lifting point to remove the powertrain from the frame.

[0020] Beneficial effects of this invention: The power support bracket and shock absorber are fitted with a clearance, which facilitates the installation and removal of the shock absorber. The auxiliary devices are symmetrically arranged between the frame and the powertrain, ensuring the stability of the powertrain during shock absorber removal and installation. By lifting the powertrain upwards and utilizing the height difference with the power support bracket, the shock absorber can be easily pulled inwards from the frame for removal or hammering for installation, reducing the impact caused by the compact left-right layout of the frame longitudinal beams and the powertrain. Compared with the existing technology of welding the support shaft to the subframe, this layout of welding the power support shaft to the frame eliminates the need to remove the powertrain from the frame when removing and installing the shock absorber, avoiding situations where the lifting rope is blocked when passing the gantry beam or the lifting rope needs to be disassembled to change the lifting position. Attached Figure Description

[0021] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0022] In the attached diagram: Figure 1 This is a schematic diagram of the pre-assembly / disassembly state of the shock absorber in this invention; Figure 2 This is a schematic diagram of the shock absorber assembly and disassembly in this invention; Figure 3 This is a schematic diagram of the power support structure in this invention; Figure 4 This is a schematic diagram of the power guide rail base structure in this invention; Figure 5 This is a schematic diagram of the power slide rail base structure in this invention; Figure 6 This is a schematic diagram of the power support base assembly in this invention.

[0023] In the diagram: 1. Power support seat; 1.1 Power rear seat; 1.1.1 Cylindrical mounting hole; 1.1.2 Welded surface; 1.2 Power support shaft; 1.2.1 Long shaft end; 1.2.2 Short shaft end; 1.3 End face; 2. Power guide rail seat; 2.1 Front plate; 2.2 Upper plate; 2.3 Lower plate; 2.4 Rear plate; 3. Power slide rail seat; 3.1 Slide rail bracket; 3.1.1 Bearing column; 3.1.2 Mounting plate; 3.1.3 Rib plate; 3.1.4 Mounting hole; 3.2 Shaft retaining ring; 3.3 Hole retaining ring; 3.4 Cylindrical roller bearing; 3.5 Round rail; 4. Shock absorber; 5. Standard parts; 6. Front lifting point; 7. Power subframe; 8. Frame; 9. Engine; 10. Rear lifting point; 11. Shaft hole seat; 11.1 Semicircular seat; 12 Bolt.

[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] like Figure 1 , Figure 2As shown, a powertrain shock absorber removal and installation device includes a power support 1, a shock absorber 4, and an auxiliary device. The power support 1 is fixedly connected to the vehicle frame 8 on one side and detachably connected to the power sub-frame 7 on the other side. The shock absorber 4 is installed between the power support 1 and the power sub-frame 7 to reduce vibrations generated during engine operation and impacts generated during powertrain installation. Part of the auxiliary device is installed on the power sub-frame 7, and another part is installed on the vehicle frame 8. It is used to support the powertrain on the vehicle frame 8 when hoisting the powertrain, so that the power support 1 with the shock absorber 4 is detached from the power sub-frame 7 and a height difference is created between them in the vertical direction, ensuring the stability of the powertrain during the removal and installation of the shock absorber 4.

[0029] A further solution: The power support 1, shock absorber 4 and auxiliary devices are symmetrically arranged between the frame 8 and the powertrain, ensuring the stability of the powertrain when the shock absorber 4 is disassembled and installed.

[0030] The following is a preferred embodiment of the above-described power support base: like Figure 3 As shown, the power support base 1 includes a power rear seat 1.1 and a power support shaft 1.2. The power rear seat 1.1 is a one-piece cast steel part with a cylindrical mounting hole 1.1.1 at the front end and a welding surface 1.1.2 machined at the rear end. The power support shaft 1.2 has a long shaft end 1.2.1 at one end and a short shaft end 1.2.2 at the other end. The long shaft end 1.2.1 passes through the cylindrical mounting hole 1.1.1 and is welded and fixed to the two end faces 1.3 of the cylindrical mounting hole 1.1.1.

[0031] It should be noted that the welding surface 1.1.2 is welded and fixed to the frame 8, and the short axle end 1.2.2 is connected to the power subframe 7. The shock absorber 4 is installed between the short axle end 1.2.2 and the power subframe 7, and adopts a clearance fit with the short axle end 1.2.2 to facilitate the installation and removal of the shock absorber 4.

[0032] Further options: such as Figure 6 As shown, a shaft hole seat 11 consisting of two semicircular seats 11.1 connected by bolts 12 is installed on the power subframe 7; one of the semicircular seats 11.1 is fixed on the power subframe 7, and the shock absorber 4, which is mounted on the power support seat 1, is inserted into the shaft hole seat 11. The shock absorber 4 is separated from the power subframe 7 by removing the other semicircular seat.

[0033] The following is a preferred embodiment of the above-described auxiliary device: The auxiliary device includes a power slide rail seat 2 mounted on the power subframe 7 and a power guide rail seat 3 mounted on the frame 8. During the disassembly and assembly of the shock absorber 4, the power slide rail seat 2 sits on the power guide rail seat 3, supporting the powertrain on the frame 8. During the disassembly and assembly of the powertrain, the power slide rail seat 3 rolls directionally on the power guide rail seat 2, causing the powertrain to slide smoothly relative to the frame 8.

[0034] like Figure 4 As shown, the power guide rail base 2 includes a front plate 2.1, an upper plate 2.2, a lower plate 2.3, and a rear plate 2.4. The upper plate 2.2 and the lower plate 2.3 are welded together on their outer edges along the direction of the frame 8, and the upper plate 2.2 and the lower plate 2.3 are welded to the inner side of the frame without contacting each other on their inner edges along the direction of the frame 8; the rear plate 2.4 is a triangular plate, which is welded together with the side of the frame, the rear edge of the upper plate, and the rear edge of the lower plate; the front plate 2.1 is welded together with the side of the frame, the front edge of the upper plate, and the front edge of the lower plate.

[0035] A further solution: The upper edge of the front plate 2.1 is higher than the surface of the upper plate 2.2, which reduces the risk of the entire powertrain sliding off the front of the frame during a slide.

[0036] like Figure 5 As shown, the power slide rail base 3 includes a slide rail bracket 3.1, a shaft elastic retaining ring 3.2, a bore elastic retaining ring 3.3, a cylindrical roller bearing 3.4, and a circular rail 3.5. The slide rail bracket 3.1 includes a bearing post 3.1.1, a mounting plate 3.1.2, and a stiffening plate 3.1.3. One end of the bearing post 3.1.1 has a retaining ring groove circumferentially formed, and a circumferential step is provided at a certain distance from this end. The mounting plate 3.1.2 has four mounting holes 3.1.4. The stiffening plate 3.1.3 is used to increase the strength of the power slide rail base 3. The shaft elastic retaining ring 3.2 is designed with a pair of clamping holes. A special tool is inserted into the clamping holes to expand the shaft elastic retaining ring 3.2 and place it into the retaining ring groove of the bearing post 3.1.1. The bore elastic retaining ring 3.3 is designed with a pair of clamping holes. A special tool is inserted into the clamping holes to clamp the bore elastic retaining ring 3.3 and place it into the retaining ring groove of the circular rail 3.5. Cylindrical roller bearing 3.4 is mounted on bearing post 3.1.1. A retaining ring 3.2 and a stepped periphery of bearing post 3.1.1 axially limit the cylindrical roller bearing 3.4 on bearing post 3.1.1. Circular rail 3.5 is a ring of a certain thickness, with a retaining ring groove at one end of its inner ring and a stepped periphery at the other end. Circular rail 3.5 is mounted on cylindrical roller bearing 3.4. A retaining ring 3.3 and a stepped periphery of circular rail 3.5 restrict the circular rail 3.5 on cylindrical roller bearing 3.4 and drive the circular rail 3.5 to roll.

[0037] It should be noted that the power guide rail seat 2 and the power slide rail seat 3 form an auxiliary device. The power guide rail seat 2 is welded to the frame 8 and is used to support and guide the power slide rail seat 3 during powertrain assembly and disassembly. The power slide rail seat 3 is mounted on the power subframe 7 through standard part 5 and mounting holes 3.1.4, and is used to smoothly slide the powertrain relative to the frame during powertrain assembly and disassembly.

[0038] The power subframe 7 is equipped with a front lifting point 6 located in front of the gantry beam and a rear lifting point 10 located behind the gantry beam; the power slide rail seat 3 is installed on the power subframe 7 located behind the gantry beam, the rear end of the power guide rail seat 2 is set on the frame 8 located behind the gantry beam, and the front end of the power guide rail seat 2 is set on the frame 8 located in front of the gantry beam. After the power slide rail seat 3 slides on the power guide rail seat 2, the rear end of the power assembly can pass through the gantry beam, so that the lifting rope can be connected to the rear lifting point 10 to remove the power assembly from the frame 8.

[0039] Two power slide rail seats 3 are arranged front and rear on each side of the power subframe 7. One of them is located at the rear end of the power subframe 7, and the other is located on the power subframe 7 below the gantry beam. During the disassembly and assembly of the shock absorber 4, the front power slide rail seat 3 sits on the power guide rail seat 2. During the disassembly and assembly of the powertrain, the front power slide rail seat 3 first rolls on the power guide rail seat 2, and then the rear power slide rail seat 3 rolls on the power guide rail seat 2 together with the front power slide rail seat.

[0040] Work Process 1: When disassembling and installing the shock absorber 4, firstly, use a hoisting rope to lift the powertrain a certain distance upward through the front hoisting point 6 and the rear hoisting point 10 on the power subframe 7, so that the power slide rail seat 3 rests on the power guide rail seat 2; secondly, the power support seat 1 with the shock absorber 4 installed is detached from the power subframe 7, and a height difference is created between it and the power subframe 7 in the vertical direction; finally, the shock absorber 4 is pulled out or knocked inward from the lower end of the power subframe 7 towards the inner side of the frame using a special tool.

[0041] Working process 2: The power slide rail 3 has rolling characteristics and can roll in a direction on the power guide rail 2, thereby driving the power assembly to slide smoothly relative to the frame 8, so that the tail end of the power assembly passes through the gantry beam, and the lifting rope can be connected to the rear lifting point 10 to remove the power assembly from the frame 8.

[0042] As can be seen from the above structure, the power support 1 and the shock absorber 4 are fitted with a clearance, which makes it easier to disassemble and assemble the shock absorber 4. The auxiliary devices are symmetrically arranged between the frame 8 and the powertrain, ensuring the stability of the powertrain when the shock absorber 4 is disassembled and installed. By lifting the powertrain upwards, the height difference between the powertrain and the power support 1 can be used to easily pull the shock absorber 4 towards the inside of the frame 8 for disassembly or hammering for installation, which can reduce the impact caused by the compact left and right layout of the frame longitudinal beam and the powertrain. Compared with the existing technology where the support shaft 11 is welded to the subframe, this layout of welding the power support shaft 1.2 to the frame eliminates the need to remove the powertrain from the frame 8 when disassembling and installing the shock absorber 4, avoiding the situation where the lifting rope is blocked when passing the gantry beam or the lifting rope is disassembled and the lifting position is changed.

[0043] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0044] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A powertrain shock absorber disassembly and assembly device, characterized in that, include: The power support mount is fixedly connected to the vehicle frame on one side and detachably connected to the power subframe on the other. Shock absorbers are installed between the power support base and the power subframe; The auxiliary device, one part of which is installed on the power subframe and the other part is installed on the frame, is used to support the powertrain on the frame when hoisting the powertrain, so that the power support seat with shock absorbers is detached from the power subframe. The power support base includes: The power rear seat is a one-piece cast steel component with a cylindrical mounting hole at the front end and a welding surface machined at the rear end, which is welded to the vehicle frame. The power support shaft has a long shaft end at one end and a short shaft end at the other end. The long shaft end passes through the cylindrical mounting hole and is welded and fixed to both ends of the cylindrical mounting hole. The shock absorber is fitted onto the short shaft end, and the short shaft end and the shock absorber are installed with a clearance fit. The power subframe is equipped with a shaft hole seat consisting of two semi-circular seats connected by bolts; one of the semi-circular seats is fixed to the power subframe, and the shock absorber, which is mounted on the power support seat, is inserted into the shaft hole seat. The shock absorber can be separated from the power subframe by removing the other semi-circular seat. The auxiliary device also enables the powertrain supported on the frame to move directionally relative to the frame, thus completing the disassembly and installation of the powertrain. The auxiliary device includes a power slide rail seat mounted on the power subframe and a power guide rail seat mounted on the frame; during the installation and removal of the shock absorber, the power slide rail seat sits on the power guide rail seat, supporting the powertrain on the frame; during the installation and removal of the powertrain, the power slide rail seat rolls directionally on the power guide rail seat, causing the powertrain to slide smoothly relative to the frame.

2. The powertrain shock absorber disassembly and assembly device according to claim 1, characterized in that: The power support, shock absorbers, and auxiliary devices are symmetrically arranged between the vehicle frame and the powertrain.

3. The powertrain shock absorber disassembly and assembly device according to claim 1, characterized in that: The power guide rail base includes a front plate, an upper plate, a lower plate, and a rear plate; The upper plate and the lower plate are welded together on the outer edge along the frame direction, and the upper plate and the lower plate are welded to the inner side of the frame without contacting each other on the inner edge along the frame direction. The rear plate is a triangular plate, which is welded to the side of the frame, the rear edge of the upper plate, and the rear edge of the lower plate. The front panel is welded to the side of the frame, the front edge of the upper panel, and the front edge of the lower panel.

4. The powertrain shock absorber disassembly and assembly device according to claim 3, characterized in that: The upper edge of the front plate is higher than the surface of the upper plate, which reduces the risk that the entire powertrain will slide off the front of the frame during sliding.

5. A powertrain shock absorber disassembly and assembly device according to claim 1, characterized in that, The power slide rail base includes: Roller bearings, which are rolled and supported on the power guide rail seat; The slide rail bracket is connected at its bottom to the power subframe and at its top to the roller bearing. The movement of the roller bearing drives the powertrain to slide relative to the frame.

6. A powertrain shock absorber disassembly and assembly device according to claim 5, characterized in that, The slide rail bracket includes: The bearing column has a retaining ring groove on its front end and a circumferential step at a predetermined inward distance from this end. The mounting plate has its top fixed to the rear end of the bearing column and several mounting holes at the bottom for mounting the power slide rail seat on the power subframe with fastening components. The roller bearing includes: A shaft elastic retaining ring is provided with a pair of clamp holes to expand the shaft elastic retaining ring and place it into the bearing post retaining ring groove; A circular track is a ring with a certain thickness, with a retaining groove at one end of the inner ring and a circumferential step at the other end. A retaining ring for holes is provided with a pair of clamping holes to clamp the retaining ring for holes and place it into the groove of the circular rail retaining ring. A cylindrical roller bearing is mounted on the bearing column, and the cylindrical roller bearing is axially limited on the bearing column by a shaft elastic retaining ring and a step around the bearing column; a circular rail is mounted on the cylindrical roller bearing, and the circular rail is restricted on the cylindrical roller bearing by a hole elastic retaining ring and a step around the circular rail, and drives the circular rail to roll.

7. A powertrain shock absorber disassembly and assembly device according to claim 1, characterized in that: The power subframe is equipped with a front lifting point located in front of the gantry beam and a rear lifting point located behind the gantry beam. The power slide rail is installed on the power subframe located behind the gantry beam. The rear end of the power slide rail is set on the frame located behind the gantry beam, and the front end of the power slide rail is set on the frame located in front of the gantry beam. After the power slide rail slides on the power slide rail, the rear end of the power assembly can pass through the gantry beam, so that the lifting rope can be connected to the rear lifting point to remove the power assembly from the frame.

8. A powertrain shock absorber disassembly and assembly device according to claim 7, characterized in that: The power subframe has two power slide rail seats arranged front and rear on each side, one of which is located at the rear end of the power subframe and the other is located on the power subframe below the gantry beam. During the disassembly and assembly of the shock absorber, the front power slide rail seat sits on the power guide rail seat; During the powertrain disassembly and assembly process, the front power slide rail first rolls on the power guide rail, and then the rear power slide rail rolls together with the front power slide rail on the power guide rail.

9. A mining dump truck, comprising a frame and an independent powertrain assembled from a generator, engine, and radiator via a power subframe, characterized in that: A powertrain shock absorber removal and installation device according to any one of claims 1 to 8 is installed between the vehicle frame and the power subframe.

10. A method for disassembling and assembling a powertrain shock absorber, implemented using the powertrain shock absorber disassembly and assembly device according to any one of claims 1 to 8, characterized in that: When disassembling and installing the shock absorber, first use the hoisting rope to lift the power assembly upward through the front and rear lifting points of the power subframe, so that the power slide rail installed on the power subframe rests on the power guide rail seat installed on the frame. Secondly, the power support mount, which is fixed to the frame and equipped with shock absorbers, detaches from the power subframe and creates a height difference with it in the vertical direction; Finally, the shock absorber is removed by pulling it from the lower end of the power subframe toward the inside of the frame or installed by tapping it using disassembly tools.

11. A method for disassembling and assembling a powertrain shock absorber according to claim 10, characterized in that: The power slide rail has rolling characteristics, which allows it to roll directionally on the power guide rail, thereby driving the power assembly to slide smoothly relative to the frame, so that the tail end of the power assembly passes through the gantry beam, and the lifting rope can be connected to the rear lifting point to remove the power assembly from the frame.

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