Portable dismounting and mounting device for dismounting and mounting tire without flanging

Abstract

The utility model relates to a portable dismounting and mounting device for dismounting and mounting a tire without flanging, which comprises a base, and a mechanical component, a hydraulic station and a motor which are all arranged on the base, the motor provides power for the hydraulic station, and the hydraulic station is used for controlling an upper oil cylinder, a lower oil cylinder and four supporting leg oil cylinders; the mechanical assembly comprises a mounting frame, a supporting column, a cantilever and a tire dismounting and mounting assembly, the mounting frame and the supporting column are both arranged on the base, the supporting column is arranged on one side of the mounting frame, the top of the supporting column is rotationally connected with the cantilever, and the tire dismounting and mounting assembly comprises a pressing disc, a working panel, a lower oil cylinder adapter, a main bearing protection sleeve, a locking pull rod, a pressing plate and a locking nut. The device further comprises a movable rim dismounting tool arranged on the top face of the hub, the hub is jacked through a lower oil cylinder, then fixed through a locking pull rod, a pressing plate and a locking nut, and finally pressed against the top end of a tire through an upper oil cylinder and a pressing disc. According to the tire dismounting device, the operation process is simplified, the tire dismounting efficiency is improved, and the stability and reliability of equipment are enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of tire removal and installation devices, specifically a lightweight tire removal and installation device that allows for tire removal and installation without flipping the tire edges. Background Technology

[0002] In the field of aviation maintenance, the efficient and safe removal and installation of aircraft tires is crucial. Currently, the widely used portable tire changers have significant shortcomings when handling aircraft tires. The process of removing aircraft tires is extremely cumbersome. First, the parts on one side of the tire's movable flange must be disassembled. Then, to remove the other side, it often requires 2-3 operators expending considerable physical effort to flip the tire over. This complex process is not only time-consuming, typically taking about 12 minutes to complete the entire tire removal, severely impacting work efficiency and increasing aircraft maintenance time costs; it also places extremely high demands on the operators' physical strength. Frequent, high-intensity flipping operations can easily lead to operator fatigue and may even cause occupational health problems such as muscle strain. With the rapid development of the aviation industry and the continuous increase in flight frequency, higher demands are placed on aircraft maintenance efficiency. The existing tire changer operation mode can no longer meet actual needs, and innovation and improvement are urgently needed to enhance the convenience and efficiency of aircraft tire removal and installation. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a lightweight tire removal and installation tool that simplifies the operation process, improves tire removal and installation efficiency, and saves labor costs by removing tires without flipping them over.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a lightweight tire disassembly and assembly device without flipping the tire edge, comprising a base and mechanical components, a hydraulic station, and a motor all mounted on the base. The motor provides power to the hydraulic station, which controls an upper cylinder, a lower cylinder, and four outrigger cylinders. The four outrigger cylinders are fixedly mounted on the bottom of the base with their piston rods facing downwards and in contact with the ground. The mechanical components include a mounting frame, a support column, a cantilever, and a tire disassembly and assembly. The mounting frame and the support column are both mounted on the base, with the support column located on one side of the mounting frame. The top of the support column passes through one end of the cantilever and is rotatably connected to the cantilever. The tire disassembly and assembly includes a pressure plate, a work panel, a lower cylinder adapter, a main bearing protective sleeve, a locking rod, a pressure plate, and a locking nut. The upper cylinder is fixedly mounted on the other end of the cantilever. The piston rod is positioned downwards and its front end is threadedly connected to the pressure plate. The pressure plate has several tire-pressing claws along its circumference. The working panel is located on top of the mounting frame and below the tire-pressing claws. The working panel and the base are respectively provided with coaxial hub mounting holes and lower cylinder mounting holes. The inner wall of the hub mounting hole is clearance-fitted with the outer diameter of the hub. The lower cylinder mounting seat is fixedly connected to the lower cylinder fixing plate, and the lower cylinder fixing plate is fixed to the base. The piston rod of the lower cylinder is positioned upwards and moves up and down within the lower cylinder mounting hole and the hub mounting hole. The front end of the lower cylinder piston rod is threadedly connected to the locking rod through a cylinder adapter. The main bearing protection sleeve is fitted onto the cylinder adapter. The pressure plate is fitted onto the locking rod and locked by a locking nut. The lightweight disassembly and assembly device also includes a movable wheel flange disassembly fixture located on the top surface of the hub.

[0005] Preferably, the hydraulic station includes an oil tank, a hydraulic pump, an air filter, a stacked hydraulic control check valve, three manual directional valves, a relief valve, a throttle valve, a pressure gauge, and high-pressure oil pipes. The oil tank is used to store hydraulic oil, and the air filter is used to filter the hydraulic oil in the oil tank. The hydraulic pump is connected to a motor, the manual directional valves, the filter, and the oil tank oil pipes. The three manual directional valves control the running direction of the upper cylinder, the lower cylinder, and the outrigger cylinder, respectively. The hydraulic station achieves hydraulic oil throttling and speed regulation through the combination of the stacked hydraulic control check valve, the relief valve, and the throttle valve, and measures the system pressure through the pressure gauge.

[0006] Preferably, the movable wheel rim disassembly fixture includes two symmetrically arranged semicircles, and a connecting rod is provided at the junction of the two semicircles to form a circle. The connecting rods at the two corresponding positions are pulled out and limited by pins and springs.

[0007] Preferably, the bottom of the cantilever is limited by a step provided on the support column, and the top of the cantilever is limited by a locking nut.

[0008] Preferably, the bottom of the base is provided with four casters that are assembled by a caster connecting plate, and a caster pad is provided between the caster connecting plate and the base.

[0009] Preferably, a lower cylinder reinforcing plate is sleeved on the outer wall of the lower cylinder, and the lower cylinder reinforcing plate is welded to the supporting crossbeam inside the base.

[0010] Preferably, the tire is placed on the workbench and a pad is provided on the top of the tire, and the tire pressure claw moves in contact with the pad.

[0011] Preferably, the upper and lower hydraulic cylinders are coaxially arranged.

[0012] Preferably, the main bearing protective sleeve includes two specifications: a front wheel adapter type and a rear wheel adapter type.

[0013] Preferably, the working surface of the tire pressure claw is designed as a contoured curved surface.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Improved ease of operation: The improved lightweight tire changer, through a unique hydraulic transmission control design, enables aircraft tires to be removed and installed in one go without flipping the tire edges; operators no longer need to perform laborious tire flipping actions, simplifying the operation process, reducing the difficulty of operation, and enabling operators to master the operation steps more easily and skillfully, greatly improving the ease of operation.

[0016] 2. Improved work efficiency: After multiple actual tests and comparisons, the improved tire changer saves about 5 minutes in the time for removing and installing a single tire compared to the previous version. This significantly shortens the maintenance time of aircraft tires, greatly improves work efficiency, provides a strong guarantee for aircraft to be put into operation more quickly, and indirectly improves the operating efficiency of airlines.

[0017] 3. This utility model reduces labor costs and improves personnel health protection: The improved tire changer requires only 2 operators to complete the work, reducing manpower needs and saving labor costs compared to the previous version. At the same time, by avoiding the heavy flipping operation, the risk of arm muscle strain for installers is greatly reduced, better protecting the occupational health of operators;

[0018] 4. Enhanced stability and reliability of this utility model equipment: The hydraulic system, electrical system and mechanical components of this equipment have been carefully designed and optimized, and the system structure is compact and novel. After extensive testing and verification, this non-flipping, lightweight tire changer has achieved a 100% success rate in one-time tire removal and installation. The equipment operates stably and without faults, providing a solid hardware foundation for the efficient and reliable removal and installation of aircraft tires. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a partial structural cross-sectional view of this utility model;

[0021] Figure 3 This is a schematic diagram of the movable wheel flange disassembly fixture structure in this utility model;

[0022] Figure 4 This is a schematic diagram of the pad structure in this utility model. Detailed Implementation

[0023] The following will combine Figure 1-4 The present invention will be described in detail below. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0024] A lightweight tire removal and installation device that does not require flipping the tire edge includes a base 25 and mechanical components, a hydraulic station 22, and a motor 20, all mounted on the base. The motor provides power to the hydraulic station, which controls an upper cylinder 21, a lower cylinder 4, and four outrigger cylinders 14. The upper and lower cylinders are coaxially aligned, and the four outrigger cylinders are fixed to the bottom of the base with their piston rods facing downwards and in contact with the ground. The mechanical components include a mounting frame 6, a support column 24, a cantilever 23, and tire removal and installation components. The mounting frame and support column are both mounted on the base, with the support column located on one side of the mounting frame. The top of the support column passes through one end of the cantilever and is rotatably connected to the cantilever. The bottom of the cantilever is limited by a step 26 on the support column, and the top of the cantilever is limited by a locking nut. The tire mounting and dismounting assembly includes a pressure plate 28, a working panel 7, a lower hydraulic cylinder adapter 8, a main bearing protective sleeve 9, a locking rod 10, a pressure plate 11, and a locking nut 12. The main bearing protective sleeve is available in two specifications: front wheel compatible and rear wheel compatible. The upper hydraulic cylinder is fixedly mounted on the other end of the cantilever. The piston rod of the upper hydraulic cylinder is positioned downwards, and its front end is threadedly connected to the pressure plate. The pressure plate has several tire-pressing claws 13 along its circumference. The working surface of the tire-pressing claws is designed as a contoured curved surface for easy application. The working panel is located on top of the mounting frame and below the tire-pressing claws. The tire is placed on the working table, and a pad 18 is provided on top of the tire. The tire-pressing claws move in contact with the pad, and the pad protects the tire-pressing claws from direct contact with the tire surface, thus preventing tire wear. Meanwhile, the working panel and the base are respectively provided with coaxial hub mounting holes and lower cylinder mounting holes. The inner wall of the hub mounting hole is clearance-fitted with the outer diameter of the hub. The lower cylinder mounting seat is fixedly connected to the lower cylinder fixing plate 5, and the lower cylinder fixing plate is fixed to the base. The piston rod of the lower cylinder is set upward and moves up and down in the lower cylinder mounting hole and the hub mounting hole. The front end of the lower cylinder piston rod is threadedly connected to the locking rod through a cylinder adapter. The main bearing protection sleeve is fitted on the cylinder adapter. The pressure plate is sleeved on the locking rod and locked by the locking nut. Specifically, the lower cylinder reinforcing plate 15 is sleeved on the outer wall of the lower cylinder. The lower cylinder reinforcing plate is welded to the support beam 16 in the base, thereby reducing and avoiding positional displacement of the lower cylinder during operation. The lightweight disassembly and assembly device also includes a movable wheel rim disassembly fixture 17 located on the top surface of the hub. The base has four casters 1 evenly distributed on the bottom, which are assembled through caster connecting plates 2, and caster pads 3 are provided between the caster connecting plates and the base, which facilitates the movement of this device to different workplaces and provides convenient transportation.

[0025] The hydraulic power unit includes an oil tank, a hydraulic pump, an air filter, a stacked hydraulic control check valve, three manual directional valves, a relief valve, a throttle valve, a pressure gauge, and high-pressure oil pipes. The oil tank stores hydraulic oil, and the air filter filters the hydraulic oil in the tank. The hydraulic pump is connected to the motor, manual directional valves, filter, and oil tank pipes. The three manual directional valves control the running direction of the upper cylinder, lower cylinder, and outrigger cylinder, respectively. The hydraulic power unit achieves hydraulic oil throttling and speed regulation through the combination of the stacked hydraulic control check valve, relief valve, and throttle valve, and measures the system pressure through the pressure gauge.

[0026] Plug the AC220V external power supply into the AC220V socket on the electrical box. With the manual directional valve handle in the middle position, turn on the power switch. The hydraulic pump starts and outputs hydraulic oil, which flows back to the oil tank through three directional valves connected in series, achieving no-load start of the hydraulic pump. Operating the manual directional valve can drive the hydraulic cylinder to move back and forth. When the cylinder rises or falls back to the top cylinder position, the system pressure will reach the relief valve's set working pressure of 8MPa. The oil overflows back to the oil tank through the relief valve. The relief valve is in a high-pressure overflow state (8MPa maximum working pressure). At this time, the directional valve handle should be placed in the middle position in time to achieve no-load operation and prevent the oil from overheating and the motor from overloading.

[0027] The movable rim disassembly fixture includes two symmetrically arranged semicircles. The junction of the two semicircles into a circle is provided with a connecting rod 29. The connecting rods at the two corresponding positions are pulled out and limited by pins and springs, thereby adjusting the diameter of the movable rim disassembly fixture to match different sized wheel hubs.

[0028] During implementation, before the initial commissioning of the equipment, the relief valve handle of the hydraulic station is in the loose position, the oil tank is filled with hydraulic oil, and the hydraulic pump motor is confirmed to rotate in the correct direction (the motor fan rotates clockwise when viewed from the rear of the motor). After starting the motor, run it unloaded for 2 minutes, then put any reversing valve handle in the working position, adjust the relief valve pressure regulating handle step by step until the pressure gauge value is between 8-10MPa, lock the adjusting nut, and complete the pressure regulation of the hydraulic station.

[0029] After confirming that the oil pump is running normally under no-load and the system pressure is set, the extension and retraction of the outrigger cylinder can be achieved by moving the handle of the manual reversing valve of the outrigger cylinder. Adjusting the adjusting screws at both ends of the double one-way throttle valve below the reversing valve can steplessly change the forward and backward speed of the outrigger cylinder. When the manual reversing valve is in the neutral position, the stacked hydraulic control one-way valve keeps the pressure of the outrigger cylinder, so that the outrigger cylinder stops at the working position.

[0030] Once the outrigger cylinders are extended to lift the frame, and the outrigger cylinder directional valve handle returns to the neutral position, and the tires and tooling are placed according to the process requirements, the handle of the manual directional valve for the lower cylinder is moved to extend and retract the lower cylinder. Adjusting the adjusting screws at both ends of the double one-way throttle valve below the directional valve can steplessly change the forward and backward speed of the lower cylinder. The stacked hydraulic control check valve ensures that when the manual directional valve is in the neutral position, the lower cylinder maintains pressure, stopping the lower cylinder at the required working position.

[0031] After confirming that the pressing cylinder and outrigger cylinder are in the required working positions, and that the tires and tooling are placed according to the process requirements, operate the handle of the manual reversing valve of the upper cylinder to extend and retract the upper cylinder. Adjust the adjusting screws at both ends of the double one-way throttle valve below the reversing valve to steplessly change the forward and backward speed of the upper cylinder. When the manual reversing valve is in the neutral position, the stacked hydraulic control one-way valve maintains pressure in the upper cylinder, stopping the upper cylinder in the required working position.

[0032] This lightweight disassembly and assembly tool can be used following these steps:

[0033] Tire installation process:

[0034] a) Disassemble the tire according to the tire product maintenance and operation manual, and complete all preparations before tire installation;

[0035] b) Place the wheel hub on the workbench and fit the positioning step, i.e., the main bearing protective sleeve, onto the bearing hole at one end of the fixed wheel hub; put on the tire, move the wheel flange, and complete all preparations before pressing the tire.

[0036] c) Start the lightweight tire changer, adjust the cantilever position, and roughly align it with the wheel hub; operate the manual reversing valve control handle of the upper cylinder forward, the upper cylinder moves downward and drives the tire pressure claw down, determine the distance between the working surface of the pressure claw and the top surface of the tire, when the distance is 10-5cm, stop the upper cylinder, return the handle to the neutral position, accurately calibrate the relative position of the working surface of the tire pressure claw and the wheel hub, and prevent damage to the wheel hub;

[0037] d) Operate the upper cylinder control handle forward, the upper cylinder continues to descend, the tire deforms, when the deformation reaches the position where the movable rim descends to fully expose the large sealing ring, stop the operation of the upper cylinder, return the handle to the neutral position, install the large sealing ring and the half retaining ring, then operate the main cylinder control handle backward to allow the upper cylinder to move upward, finally remove the cantilever and take out the installed tire.

[0038] Tire removal process:

[0039] a) Release the internal pressure according to the tire product maintenance and operation manual, and complete all preparations before removing the tire;

[0040] b) Activate the lightweight tire changer, operate the manual directional valve control handle of the outrigger cylinder, and raise the outrigger cylinder;

[0041] c) Place the tire on the workbench, place the pad, and apply pressure to compress the tire;

[0042] d) Operate the manual reversing valve control handle of the lower hydraulic cylinder to raise the lower hydraulic cylinder until the inner ring of the wheel hub bearing is in contact with the bearing protective sleeve;

[0043] e) Install the wheel fixing fixture, locking rod, and pressure plate, and tighten with locking nuts (tighten by hand);

[0044] f) Adjust the cantilever to roughly align with the wheel hub. Operate the manual reversing valve control handle of the upper hydraulic cylinder to press down the upper hydraulic cylinder. The tire will deform. Press down the upper hydraulic cylinder until there is enough space to remove the sealing ring (it is not necessary to press down until the tire is separated from the moving wheel flange). Remove the sealing ring and the half retaining ring.

[0045] g) Operate the manual reversing valve control handle of the lower hydraulic cylinder to control the lower hydraulic cylinder to descend. The wheel hub will slowly descend until you hear a "bang" sound and then stop. At this time, the lower hydraulic cylinder descends until the tire is separated from the wheel hub.

[0046] h) Install the movable rim removal tooling onto the wheel hub;

[0047] i) Operate the manual reversing valve control handle of the lower hydraulic cylinder to control the lower hydraulic cylinder to move upward until the movable wheel flange disassembly fixture contacts the movable wheel flange;

[0048] j) Operate the manual reversing valve control handle of the upper cylinder, press down the upper cylinder, and the tire will deform until you hear a "bang" sound, when the tire is completely separated from the moving rim, and stop pressing down;

[0049] k) Operate the manual reversing valve control handle of the upper hydraulic cylinder. The upper hydraulic cylinder moves upward until the tire pressure claw is higher than the tire surface. At this time, push open the suspension arm, take out the movable wheel flange, and remove the tire.

[0050] 1) Remove the locking rod and pressure plate of the wheel fixing fixture, loosen the locking nut, remove the wheel hub, and control the lower cylinder to descend to the initial position;

[0051] m) Operate the outrigger cylinder control handle to retract the outrigger cylinder;

[0052] n) All control handles return to the neutral position;

[0053] o) Turn off the power and put away the tools and fixtures (complete);

[0054] p) The machine returns the product to its original position, completing a tire removal workflow.

[0055] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A lightweight tire removal and installation tool that allows for tire removal and installation without flipping the tire edges, characterized in that: The system includes a base (25) and mechanical components, a hydraulic station (22), and a motor (20) all mounted on the base. The motor provides power to the hydraulic station, which controls the upper cylinder (21), the lower cylinder (4), and four outrigger cylinders (14). The four outrigger cylinders are fixedly mounted on the bottom of the base with their piston rods facing downwards and in contact with the ground. The mechanical components include a mounting frame (6), a support column (24), a cantilever (23), and a tire mounting / removing assembly. The mounting frame and support column are both mounted on the base, with the support column located on one side of the mounting frame. The top of the support column passes through one end of the cantilever and is rotatably connected to the cantilever. The tire mounting / removing assembly includes a pressure plate (28), a work panel (7), a lower cylinder adapter (8), a main bearing protective sleeve (9), a locking rod (10), a pressure plate (11), and a locking nut (12). The upper cylinder is fixedly mounted on the other end of the cantilever. The piston rod of the upper cylinder is set downward and the front end of the piston rod is threadedly connected to the pressure plate. The pressure plate is provided with several tire pressing claws (13) along the circumference. The working panel is set on the top of the mounting frame and below the tire pressing claws. At the same time, the working panel and the base are respectively provided with a hub mounting hole and a lower cylinder mounting hole on the same axis. The inner wall of the hub mounting hole is clearance-fitted with the outer diameter of the hub. The lower cylinder mounting seat is fixedly connected to the lower cylinder fixing plate (5). At the same time, the lower cylinder fixing plate is fixed to the base. The piston rod of the lower cylinder is set upward and moves up and down in the lower cylinder mounting hole and the hub mounting hole. The front end of the lower cylinder piston rod is threadedly connected to the locking rod through the cylinder adapter. The main bearing protection sleeve is fitted on the cylinder adapter. The pressure plate is sleeved on the locking rod and locked by the locking nut. The lightweight disassembly and assembly device also includes a movable wheel flange disassembly fixture (17) set on the top surface of the hub.

2. The lightweight tire removal and installation device without flipping the tire edges according to claim 1, characterized in that: The hydraulic station includes an oil tank, a hydraulic pump, an air filter, a stacked hydraulic control check valve, three manual directional valves, a relief valve, a throttle valve, a pressure gauge, and high-pressure oil pipes. The oil tank stores hydraulic oil, and the air filter filters the hydraulic oil in the tank. The hydraulic pump is connected to a motor, the manual directional valves, the filter, and the oil tank pipes. The three manual directional valves control the running direction of the upper cylinder, lower cylinder, and outrigger cylinder, respectively. The hydraulic station achieves hydraulic oil throttling and speed regulation through a combination of the stacked hydraulic control check valve, relief valve, and throttle valve, and measures the system pressure through the pressure gauge.

3. The lightweight tire removal and installation device without flipping the tire as described in claim 1, characterized in that: The movable wheel rim disassembly fixture includes two symmetrically arranged semicircles. A connecting rod (29) is provided at the junction of the two semicircles to form a circle. The connecting rods at the two corresponding positions are pulled out and limited by pins and springs.

4. The lightweight tire removal and installation device without flipping the tire as described in claim 1, characterized in that: The bottom of the cantilever is limited by the step (26) provided on the support column, and the top of the cantilever is limited by locking the locking nut.

5. The lightweight tire removal and installation device without flipping the tire as described in claim 1, characterized in that: The base has four casters (1) evenly distributed on its bottom, which are assembled by the caster connecting plate (2), and a caster pad (3) is provided between the caster connecting plate and the base.

6. The lightweight tire removal and installation tool without flipping the tire edges according to claim 1, characterized in that: The lower cylinder is fitted with a lower cylinder reinforcing plate (15) on its outer wall, and the lower cylinder reinforcing plate is welded to the supporting beam (16) inside the base.

7. The lightweight tire removal and installation tool without flipping the tire edges according to claim 1, characterized in that: The tire is placed on the workbench and a pad (18) is provided on the top of the tire, and the tire pressure claw moves in contact with the pad.

8. The lightweight tire removal and installation tool without flipping the tire edges according to claim 1, characterized in that: The upper and lower hydraulic cylinders are coaxially arranged.

9. The lightweight tire removal and installation tool without flipping the tire edges according to claim 1, characterized in that: The main bearing protective sleeve is available in two specifications: front wheel adapter and rear wheel adapter.

10. The lightweight tire removal and installation device without flipping the tire as described in claim 1, characterized in that: The working surface of the tire pressing claw is designed as a contoured curved surface.

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