A portable assembled excavator gearbox disassembly and assembly tool

Abstract

The present invention discloses a portable assembly-type excavator gearbox disassembly and assembly tool, comprising a load-bearing platform, a load-bearing steel frame, and a lifting mechanism, the lifting mechanism comprising a hydraulic lifting rod, a slide rail, and a hydraulic pump, the load-bearing steel frame comprising a pair of crossbars and two side panels connected at both ends of the crossbars, the upper and lower edges of the side panels being bent to one side to form upper side bars, the ends of the crossbars being provided with grooved rails with downward openings, the ends of the upper side bars of the side panels being provided with hangers, the crossbars and side panels being assembled into a square frame-shaped load-bearing steel frame by means of the matching grooved rails and hangers, the load-bearing platform being placed within the load-bearing steel frame, a slide rail being fixedly disposed horizontally on the inner upper portion of each side panel, the two slide rails being arranged parallel and opposite to each other within the load-bearing steel frame, the hydraulic lifting rods being suspended from the slide rails by pulleys rolling on the slide rails, the four corners of the load-bearing platform being connected to the bottom ends of the four hydraulic lifting rods, respectively. The present invention is compact, detachable, and portable, and can be used to quickly disassemble and assemble the gearbox without the need for multiple people to cooperate, without requiring contact with the ground, and can also be used to quickly disassemble and assemble the gearbox even when the base wheels are sunken or the vehicle body is tilted.

Description

Technical Field

[0001] The invention relates to the technical field of excavator gearbox disassembly and assembly equipment, in particular to a portable assembled excavator gearbox disassembly and assembly tool. Background Art

[0002] The gearbox is a crucial component of the equipment's transmission system, making its removal and repair a regular part of equipment maintenance. Gearbox specifications are 1 meter in length, 1 meter in width, 55 cm in height, and weigh approximately 200-350 kg. Its large size, heavy weight, complex structure, and symmetrical shape are hallmarks of the gearbox. Furthermore, the gearbox is typically mounted on the underside of the excavator frame, creating challenges such as cramped working space, difficult assembly and disassembly, high safety risks, and low efficiency. Disassembling and installing a gearbox weighing over 300 kg in the confined space beneath the excavator is extremely difficult, and manual labor alone is challenging, resulting in low efficiency and a high risk of injury.

[0003] Excavators primarily operate in the field, requiring extensive field maintenance. Field conditions can be complex, characterized by muddy, uneven terrain, and high levels of gravel. Currently, existing gearbox assembly and disassembly tools are often bulky, difficult to disassemble and assemble, and inconvenient to carry. They require multiple people to operate, which is inconvenient. Furthermore, most tools require contact with the ground, which can lead to wheel siltation and tilting, making them unsuitable for outdoor environments with uneven surfaces. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable assembled excavator gearbox disassembly and assembly tool to address the deficiencies in the prior art.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A portable assembled excavator gearbox disassembly and assembly tool, the gearbox is installed at the bottom of the excavator frame, including a load-bearing platform, a load-bearing steel frame and a lifting mechanism, the load-bearing steel frame is composed of a pair of cross bars and two side panels respectively connected to the two ends of the cross bars, the upper edge of the side panel is bent 90 degrees to one side to form an upper side bar, the two ends of the cross bar are provided with a groove rail with an opening facing downward, the two ends of the upper strip of the side panel are respectively provided with a hanger adapted to the groove rail, the side panels are hung on the two side ends of the two cross bars through the cooperation of the hanger and the groove rail, and are assembled into a square frame-type load-bearing steel frame, the load-bearing platform is placed in the load-bearing steel frame; the lifting mechanism includes a hydraulic lift Rods, slide rails and hydraulic pumps, a slide rail is fixedly set horizontally on the upper inner side of each side panel, the two slide rails are parallel and oppositely arranged in the load-bearing steel frame, the length of the slide rail is longer than the width of the side panel, and a long slot is provided on the slide rail. Two hydraulic lifting rods are installed on each slide rail, and the upper end of the hydraulic lifting rod is fixedly connected to a pulley through the long slot of the slide rail. The hydraulic lifting rod is suspended on the slide rail through the pulley rolling on the slide rail; the four corners of the load-bearing platform are respectively connected to the bottom ends of the four hydraulic lifting rods, and the cross bar is provided with a hanging rod for mounting the above-mentioned load-bearing steel frame on the excavator frame. The hydraulic lifting rod is connected to the hydraulic pump through a hose.

[0007] In a further design scheme of the present invention, the above-mentioned gearbox disassembly and assembly tool is a combined assembly type. When in use, a pair of cross bars are first installed on both sides of the gearbox frame respectively, and then the cross bars, side panels, slide rails, load-bearing platforms, hydraulic lifting rods and hydraulic pumps are assembled, and then the gearbox is disassembled or installed smoothly and quickly; when not in use, it is in a scattered and unassembled state for easy carrying.

[0008] In a further design scheme of the present invention, the connection method between the above-mentioned hydraulic lifting rod and the carrying platform adopts a single-double-ear connection method. The bottom end of the hydraulic lifting rod is a single earring structure, and the four corners of the carrying platform are respectively provided with double-ear connectors compatible with the single earring.

[0009] In a further design solution of the present invention, a gearbox supporting and fixing block that is adapted to the shape of the bottom of the gearbox is provided on the above-mentioned bearing platform.

[0010] In a further design scheme of the present invention, the lower edge of the above-mentioned side panel is bent 90° to the same side as the upper edge strip to form a lower edge strip, and the lower edge strips of the two side panels are each provided with a row of rollers supporting the bearing platform, and the bottom surface of the bearing platform is provided with two roller grooves corresponding to the rollers, and the roller grooves are adapted to the size of the rollers.

[0011] In a further design solution of the present invention, the above-mentioned bearing platform is made of Q235 structural steel with a thickness greater than 10 mm.

[0012] In a further design solution of the present invention, the rollers on the lower edge strips of the side panels adopt N204E cylindrical ball bearings, and the row of rollers consists of 10 bearings installed at equal distances.

[0013] In a further design of the present invention, the hydraulic pump adopts a CP-180 hand-cranked hydraulic pump.

[0014] In a further design of the present invention, a blocking bar is provided on the slide rail.

[0015] In a further design of the present invention, the lifting mechanism includes an electric push rod and a control device, which replace the hydraulic lifting rod and the hydraulic pump respectively, and the control device is used to control the lifting of the electric push rod.

[0016] The present invention has the following outstanding beneficial effects:

[0017] 1. The steel frame disassembly and assembly equipment is assembled from multiple portable detachable parts, which is convenient for carrying and transporting in the field environment during combat.

[0018] 2. The disassembly and assembly tools can be quickly installed and disassembled through the simple methods of bolts, grooved rails, and pins with single and double ears. The grooved rails and long through-holes allow the side panels and hydraulic lift rods to be flexibly moved, allowing the disassembly and assembly tools to flexibly adjust the position of the load platform according to the different positions of different excavators of the same model.

[0019] 3. The cross bar can make full use of the screw holes after the tool boxes on both sides of the frame are disassembled, and is rigidly connected to the frame through bolts. Under the premise of ensuring the safety and stability of the disassembly and assembly tools, the entire tool is suspended in the air and does not contact the ground, which greatly improves the adaptability of the disassembly and assembly tool of the present invention to maintenance in different ground environments.

[0020] 4. The assembly and disassembly tool of the present invention utilizes a hand-cranked hydraulic pump for hydraulic lifting. Four hydraulic lift rods are positioned at the four corners of the load platform. When installing the gearbox, the extension length of the four hydraulic lift rods can be adjusted to fine-tune the gearbox's position, facilitating alignment of the gearbox's mounting holes with those on the vehicle frame. This greatly facilitates quick installation of the gearbox.

[0021] 5. The disassembly and assembly tool of the present invention adopts a slide rail to move the gearbox outward. The gearbox can be moved out without disassembling the carrying platform and the hydraulic lifting rod, and the disassembly and assembly speed is faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1. It is a schematic structural diagram of the assembled portable excavator gearbox disassembly and assembly tool in the embodiment;

[0023] Figure 2 2. It is a schematic diagram of the crossbar structure in the embodiment;

[0024] Figure 3 2. It is a schematic diagram of the side panel structure in the embodiment;

[0025] Figure 4 Schematic diagram of the side panels and crossbars connected via hangers and groove rails in the embodiment;

[0026] Figure 5 This is a schematic diagram of the structure of the hydraulic lifting rod in the embodiment;

[0027] Figure 6 2. It is a schematic diagram of the slide rail structure in the embodiment;

[0028] Figure 7 This is a schematic diagram of the structure of the carrying platform in the embodiment;

[0029] Figure 8 This is a schematic structural diagram of the oil circuit connecting the hydraulic lifting rod and the hydraulic pump in the embodiment;

[0030] Figure 9 Schematic diagram of the structure of a portable assembled excavator gearbox disassembly and assembly tool installed on a vehicle frame in an embodiment;

[0031] In the figure, 1- load-bearing platform, 2- cross bar, 3- side plate, 4- hydraulic lifting rod, 5- frame, 6- hanging rod, 7- mounting hole, 8- groove rail, 9- hand hydraulic pump, 10- upper side bar, 11- lower side bar, 12- hanger, 13- double ear connector, 14- fixed block, 15- single earring, 16- gearbox, 17- roller, 18- roller slide, 19- slide rail, 20- long notch, 21- pulley, 22- quick connector oil pipe, 23- stop bar. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0033] See attached Figure 1-9, a portable assembled excavator gearbox disassembly and assembly tool, the gearbox 16 is installed at the bottom of the excavator frame 5, and a tool box is fixedly installed on both sides of the frame 5 by screw connection, the gearbox disassembly and assembly tool includes a load-bearing platform 1, a load-bearing steel frame and a lifting mechanism, the load-bearing steel frame consists of a pair of cross bars 2 and two side plates 3 connected to the two ends of the cross bars 2 respectively, the upper edges of the side plates 3 are bent 90 degrees to the same side to form an upper side bar 10 and a lower side bar 11, and groove rails 8 with openings facing downwards are provided at both ends of the cross bars 2, and hangers 12 that are compatible with the groove rails 8 are provided on the two ends of the side plates 3 through the cooperation of the hangers 12 and the groove rails 8, and the side plates 3 are suspended at both sides of the two cross bars 2 to form a square frame-type load-bearing steel frame, and the load-bearing platform 1 is placed in the load-bearing steel frame; the lifting mechanism includes a hydraulic lifting rod 4, a slide rail 19 and a hydraulic A horizontal slide rail 19 is fixed to the upper inner side of each side panel, with a retaining bar 23 on top. The two slide rails 19 are arranged parallel and opposite each other within the supporting steel frame. The slide rails 19 are longer than the side panel width and feature long slots 20. Two hydraulic lift rods 4 are mounted on each slide rail 19. The upper ends of the hydraulic lift rods extend through the slots 20 of the slide rails 19 and are fixedly connected to pulleys 21. The hydraulic lift rods are suspended from the slide rails 19 via pulleys 21 that roll on the slide rails 19. The four corners of the supporting platform 1 are connected to the bottom ends of the four hydraulic lift rods. A hanger rod 6 is provided on the crossbar 2 for mounting the supporting steel frame to the excavator frame 5. The hanger rod 6 has mounting holes 7. The hydraulic lift rods 4 are connected to the hydraulic pump via a hose. The hydraulic pump uses a CP-180 hand-cranked hydraulic pump. To ensure smooth and safe assembly and disassembly of the gearbox, the supporting platform 1 is equipped with a gearbox support block 14 that matches the shape of the bottom of the gearbox 15.

[0034] The connection between the hydraulic lifting rod 4 and the carrying platform 1 adopts a single-double-ear connection method. The bottom end of the hydraulic lifting rod 4 is a single earring structure, and the four corners of the carrying platform 1 are respectively provided with double-ear connectors 13 compatible with the single earring 15.

[0035] The gearbox disassembly and assembly tool is a modular assembly type. When in use, first install a pair of crossbars 2 on both sides of the gearbox 16 frame 5, then assemble the crossbars 2, side panels 3, slide rails 19, load-bearing platform 1, hydraulic lift rods 4 and hydraulic pump, and then smoothly and quickly disassemble or install the gearbox 16; when not in use, it is in a scattered and unassembled state for easy carrying. Specifically, when installing, first remove the toolboxes on both sides of the frame, so that the load-bearing steel frame can be installed on the frame through the screws or screw holes of the toolboxes, and then use screws to fix the crossbars 2 on both sides of the frame 5 through the mounting holes 7 on the crossbar 2 hanging rods 6, so that the crossbars 2 are rigidly connected to the frame 5; the hangers 12 at both ends of the side panels 3 are respectively inserted into the groove rails 8 of the crossbar 2, so that the two side panels 3 are respectively suspended at both ends of the crossbar 2, and the side panels 3 can move back and forth on the crossbar 2 along the groove rails 8. The upper end of the hydraulic lift rod 4 is passed through the long slot 20 of the slide rail 19 and connected to the pulley 21. The hydraulic lift rod 4 is installed and suspended on the slide rail 19, and the slide rail 19 is fixedly connected to the side panel 3. The single earrings 15 at the bottom ends of the four hydraulic lift rods 4 are respectively connected to the double-ear connectors 13 at the four corners of the load-bearing platform 1. The hydraulic lift rod 4 and the hydraulic pump are connected by oil pipes. During operation, the load-bearing platform 1 bears the weight of the gearbox 16, and then the hydraulic lift rod 4 is used to achieve the lifting and lowering of the gearbox 16 during the assembly and disassembly process. The disassembly and assembly tools can be quickly installed and disassembled using simple methods such as screws, grooved rails 8, and pins with single and double ears. The grooved rails 8 and long through-holes allow the side panels 3 and hydraulic lift rods 4 to be flexibly moved, allowing the disassembly and assembly tools to flexibly adjust the position of the load-bearing platform 1 according to the different positions of different excavators of the same model.

[0036] Since the load-bearing platform 1 primarily bears the weight of the gearbox 16, its thickness must meet strength and rigidity requirements to ensure safety, and a strength check was performed. The gearbox 16 and load-bearing platform 1 weigh an estimated 300 kg. The load-bearing platform 1 is constructed of Q235 structural steel with a thickness greater than 10 mm. A roller chute 18 is provided on the bottom surface of the load-bearing platform 1, where it contacts the row of rollers 17 on the lower edge strip 11 of the side panel 3. The chute 18 matches the size of the rollers 17. This ensures safer and easier movement of the load-bearing platform 1.

[0037] The cross bar 2 can make full use of the screw holes on both sides of the frame after the toolboxes are disassembled, and is rigidly connected to the frame through screws. Under the premise of ensuring the safety and stability of the disassembly and assembly tools, the entire tool is in a suspended state and does not contact the ground, which greatly improves the adaptability of the disassembly and assembly tool of the present invention in different ground environments.

[0038] In addition to using a hand-cranked hydraulic pump or a mobile hydraulic station with a hydraulic lifting rod 4 as the external power to drive the load-bearing platform 1 to rise and fall, the lifting mechanism can also use an electric lifting mechanism, including an electric push rod and a control device. The electric push rod and the control device replace the hydraulic lifting rod 4 and the hydraulic pump respectively, and the electric push rod is controlled to rise and fall by the control device. In this embodiment, a hydraulic lifting rod 4 and a hydraulic pump are used. In this embodiment, the disassembly and assembly equipment adopts a hand-cranked hydraulic pump, and the lifting and lowering of the load-bearing platform 1 is achieved by hydraulic power. Four electric push rods or hydraulic lifting rods 4 are used, respectively placed at the four corners of the load-bearing platform 1, and the purpose of adjusting the lifting and lowering of the load-bearing platform 1 is achieved by adjusting the extension length of the push rods.

[0039] When the gearbox does not need to be disassembled, the disassembly and assembly tool of the present invention can be disassembled into the cross bar 2, side panel 3, slide rail 19, pulley 21, hydraulic lifting rod 4, load-bearing platform 1, connecting and fastening parts, etc., so that the volume of the whole set of tools is reduced, which is convenient for storage and transportation.

[0040] When using disassembly tools to disassemble the gearbox 16, the specific disassembly steps are as follows:

[0041] 1. First, remove the toolboxes on both sides of the excavator frame 5, and then use screws to rigidly connect the left and right cross bars 2 to the frame 5.

[0042] 2. After the crossbar 2 is installed, push the hanger 12 of the side panel 3 into the groove 8 of the crossbar 2 to complete the installation. Install the other side panel 3 in the same way.

[0043] 3. Pass the upper end of the hydraulic lifting rod 4 through the long slot 20 of the slide rail 19 and connect it to the pulley 21. Install the hydraulic lifting rod 4 on the slide rail 19 and hang it on the slide rail 19. Two hydraulic lifting rods 4 are installed on each slide rail 19.

[0044] 4. Fix the slide rail 19 to the side plate 3 through screws and nuts; connect the single earrings 15 at the bottom ends of the four hydraulic lifting rods 4 to the double ear connectors 13 at the four corners of the load-bearing platform 1 respectively.

[0045] 5. Install the load-bearing platform 1. Adjust the distance between the left and right side panels 3 so that the roller slots 18 on the bottom of the load-bearing platform 1 align with the row of rollers 17 on the side panels 3. Then, connect the four double-ear connectors 13 of the load-bearing platform 1 to the single earrings 15 of the four hydraulic lift rods 4 using pins.

[0046] 6. Use the quick connector oil pipe 22 to connect the hydraulic lift rod 4 oil port through the reversing valve and the hand hydraulic pump 9 according to the attached Figure 7 The oil circuit diagram completes the installation of the hydraulic lifting system.

[0047] 7. The overall picture is as follows Figure 8As shown. With the reversing valve positioned on the left, the hand-cranked hydraulic pump 9 supplies oil to raise the carrying platform 1, aligning the four fixing blocks 14 of the carrying platform 1 with the four hydraulic motors of the gearbox 16. The reversing valve is then positioned in the neutral position, and the three fixing screws of the gearbox 16 are removed. The reversing valve is then positioned on the right, and the adjustable throttle valve is used to smoothly lower the gearbox 16 and the carrying platform 1 to the appropriate position.

[0048] 8. Drag the carrying platform 1 outward, allowing the pulley 21 to slide outward along the guide rail 19. This will allow the carrying platform 1, carrying the gearbox 16, to be removed from the bottom of the vehicle frame, facilitating the removal of the gearbox 16 for repair. After repairs are complete, follow the reverse steps above to complete the installation of the gearbox 16 and the removal of the assembly and disassembly equipment. During the installation of the gearbox 16, to ensure that the gearbox 16 mounting screws can be installed smoothly in various environments and conditions, the extension length of the hydraulic lift rods 4 at the four corners of the carrying platform 1 can be adjusted to adjust the position of the gearbox. This allows for quick removal and installation of the gearbox even when the base wheel is sunken or the vehicle body is tilted.

[0049] In this embodiment, a row of rollers 17 are provided on the lower side rail 11 below the side panel 3 to support the carrying platform 1. This allows the carrying platform 1, loaded with a heavy gearbox 16, to be dropped onto the lower side rail 11 for removal, avoiding the need for the carrying platform to be suspended on the slide rails 19 while the gearbox 16 is removed, thereby making the removal process safer and smoother. However, removal after dropping onto the lower side rail 11 requires disassembly of the pins at the four double-ear connectors 13 on the carrying platform 1, which slows down disassembly and installation. Therefore, while this method allows for safer and easier movement of the carrying platform 1, it should only be used in specific environments and situations.

[0050] The above are preferred embodiments of the present invention. Any changes made according to the technical solution of the present invention, as long as the resulting functions and effects do not exceed the scope of the technical solution of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A portable assembled excavator gearbox disassembly and assembly tool, wherein the gearbox (16) is mounted on the bottom of the excavator frame (5), characterized in that: The invention comprises a bearing platform (1), a bearing steel frame and a lifting mechanism, wherein the bearing steel frame is composed of a pair of cross bars (2) and two side plates (3) respectively connected to the two ends of the cross bars (2); the upper edge of the side plate (3) is bent 90 degrees to one side to form an upper edge strip (10); the two ends of the cross bars (2) are provided with groove rails (8) with openings facing downwards; the two ends of the upper edge strip (10) of the side plate (3) are respectively provided with hangers (12) adapted to the groove rails (8); the side plates (3) are suspended on both side ends of the two cross bars (2) through the cooperation of the hangers (12) and the groove rails (8) to form a square frame-type bearing steel frame, and the bearing platform (1) is placed in the bearing steel frame; the lifting mechanism comprises a hydraulic lifting rod (4), a slide rail (19) and a hydraulic pump, and the upper inner portion of each side plate is provided with a hydraulic lifting rod (4), a slide rail (19) and a hydraulic pump. A slide rail (19) is fixedly arranged horizontally, and two slide rails (19) are arranged parallel and opposite to each other in the bearing steel frame. The length of the slide rail (19) is longer than the width of the side plate. A long slot (20) is provided on the slide rail (19). Two hydraulic lifting rods (4) are installed on each slide rail (19). The upper end of the hydraulic lifting rod passes through the long slot (20) of the slide rail (19) and is fixedly connected to a pulley (21). The hydraulic lifting rod is suspended on the slide rail (19) through the pulley (21) rolling on the slide rail (19); the four corners of the bearing platform (1) are respectively connected to the bottom ends of the four hydraulic lifting rods, and the cross bar (2) is provided with a hanging rod (6) for installing the above-mentioned bearing steel frame on the excavator frame (5). The hydraulic lifting rod (4) is connected to the hydraulic pump through a hose.

2. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: The gearbox disassembly and assembly tool is a combined assembly type. When in use, a pair of cross bars (2) are first installed on both sides of the frame (5) of the gearbox (16), and then the cross bars (2), side panels (3), slide rails (19), load-bearing platforms (1), hydraulic lifting rods (4) and hydraulic pumps are assembled, thereby smoothly and quickly disassembling or installing the gearbox (16); when not in use, the gearbox is in a scattered and unassembled state for easy carrying.

3. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: The connection method between the hydraulic lifting rod (4) and the carrying platform (1) adopts a single-double-ear connection method. The bottom end of the hydraulic lifting rod (4) is a single-ear ring structure, and the four corners of the carrying platform (1) are respectively provided with double-ear connectors (13) adapted to the single ear ring (15).

4. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: The bearing platform (1) is provided with a gearbox supporting and fixing block (14) that matches the shape of the bottom of the gearbox (16).

5. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: The lower edge of the side panel (3) is bent 90 degrees to the same side as the upper edge strip (10) to form a lower edge strip (11), and each of the lower edge strips (11) of the two side panels (3) is provided with a row of rollers (17) supporting the bearing platform, and the bottom surface of the bearing platform (1) is provided with two roller grooves (18) corresponding to the rollers (17), and the roller grooves (18) are adapted to the size of the rollers (17).

6. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: The bearing platform (1) is made of Q235 structural steel with a thickness greater than 10 mm.

7. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: The rollers (17) on the lower edge strips (11) of the side panels (3) use N204E cylindrical ball bearings, and a row of the rollers (17) consists of 10 equally spaced bearings.

8. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: The hydraulic pump adopts a CP-180 hand-cranked hydraulic pump.

9. The portable assembled excavator gearbox disassembly and assembly tool according to claim 1, characterized in that: A blocking bar (23) is provided on the slide rail (19).

10. The portable assembled excavator gearbox disassembly and assembly tool according to any one of claims 1 to 9, characterized in that: The lifting mechanism comprises an electric push rod and a control device, wherein the electric push rod and the control device replace the hydraulic lifting rod (4) and the hydraulic pump respectively, and the electric push rod is controlled to be lifted and lowered by the control device.

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