Tire dismounting device for aircraft tractor
By designing a disassembly device suitable for large-size tires in aircraft tractors, the problem of difficulty in disassembling large-scale tires in existing equipment is solved, and the effect of reducing labor intensity and improving work efficiency is achieved.
Patent Information
- Application Number
- CN202421717022.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-19
AI Technical Summary
Existing tire disassembly equipment is difficult to adapt to large-sized heavy-duty tires of aircraft tractors, resulting in high labor intensity, high operating risks and low working efficiency for maintenance personnel.
An aircraft tractor tire removal device is designed, including a trolley body, a tread grab bracket, a tread grab clamp arm and a push screw. The height of the tread grab bracket is adjusted by the lifting component, the length of the tread grab clamp arm is adjusted by the size adjustment component, and the tire removal is completed by the driving of the tread push screw.
It reduces the labor intensity of maintenance personnel, improves the working efficiency of tire disassembly and assembly, makes the device easy to operate, has high reliability, good stability, and is safe and efficient in the use process.
Smart Images
Figure CN222756370U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aviation ground support equipment maintenance, in particular to a tire disassembly device for an aircraft tractor. Background Art
[0002] Aircraft tractors are one of the essential equipment for airport ground support. During the maintenance of aircraft tractors, their tires need to be replaced regularly.
[0003] Due to the characteristics of large mass and compact structure of aircraft tractors, the tires they are equipped with are large-size heavy-duty tires, and the tire rims are tightly matched with the axle hubs, making them difficult to disassemble. However, due to size limitations, existing tire disassembly equipment cannot meet the disassembly needs of large tires such as aircraft tractors. In the past, disassembly mainly relied on manpower and simple tools, which resulted in problems such as high labor intensity, high operating risks, and low work efficiency. Utility Model Content
[0004] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides an aircraft tractor tire removal device to adapt to the removal requirements of large-size tires, thereby reducing the labor intensity of maintenance personnel and improving the work efficiency of tire removal and installation.
[0005] The technical solution of the utility model is: an aircraft tractor tire removal device, comprising a trolley body, a tire grabbing bracket, a tire grabbing clamp arm and a push screw, the tire grabbing bracket is installed on the trolley body via a lifting assembly and moves vertically relative to the trolley body, the push screw is connected to the tire grabbing bracket via a push screw sleeve, the rear end of the push screw is a driving end, the front end of the push screw passes through a through hole arranged in the middle of the tire grabbing bracket and forms a push surface that contacts the axle wheel hub of the tire to be removed, the tire grabbing clamp arm is multiple and distributed circumferentially on the tire grabbing bracket, one end of the tire grabbing clamp arm has a hook plate portion for hooking the tire to be removed, and the other end of the tire grabbing bracket is equipped with a size adjustment assembly that drives it to move radially along the through hole. The height of the tire grabbing bracket is adjusted by the lifting assembly, and the length of the hook plate of the tire grabbing clamp arm extending out of the tire grabbing bracket is adjusted by the size adjustment assembly, so as to adapt to the large-size tire of the aircraft tractor. The driving end of the pushing screw applies a driving force, and the front end of the pushing screw pushes the axle hub of the tire. At this time, the cart body moves in the direction away from the tire under the reaction force of the pushing screw, and the tire grabbing bracket drives the tire to separate from the axle hub through the tire grabbing clamp arm to complete the tire removal work. The whole device is easy to operate, reduces the labor intensity of maintenance personnel, and improves the work efficiency of tire removal and assembly.
[0006] The cart body is a U-shaped body, and rolling wheels are installed at the bottom of the U-shaped body. The open end of the U-shaped body faces the tire to be removed. Two columns are fixed side by side on the closed end of the U-shaped body. The column is provided with a T-slot A in the vertical direction on the side facing the tire to be removed. The lifting component is a hydraulic jack, and the hydraulic jack is fixed on the U-shaped body between the two columns. The bottom of the tire gripping bracket is connected to the output end of the hydraulic jack, and T-shaped sliders A matching the T-slot A are formed on both sides of the tire gripping bracket. The design of the U-shaped body and the columns can stabilize the center of gravity of the device and the tire during the tire removal process, prevent the device from tilting forward, and ensure the safety and reliability of the device.
[0007] The tire grabbing bracket is provided with a T-slot B radially along the through hole on the side of the tire to be removed, the tire grabbing clamp arm is a J-shaped structure, the curved section of the tire grabbing clamp arm is the hook plate portion, and a T-slot slider B matching the T-slot B is formed on the outer side of the vertical section of the tire grabbing clamp arm.
[0008] The size adjustment assembly includes a screw support, a hollow screw, a tensioning and closing wire sleeve and a tensioning and closing connecting rod. The front end of the screw support is fixedly connected to the side of the tire gripping support facing away from the tire to be removed, and the rear end of the screw support is fixedly connected to the push wire sleeve. The two ends of the screw support are provided with connection holes for the push screw to pass through. The middle part of the screw support has an installation chamber. The hollow screw is sleeved on the push screw inside the installation chamber, and the two ends of the hollow screw are rotatably connected to the screw support through bearings. The tensioning and closing wire sleeve is matched with the hollow screw, and the two ends of the tensioning and closing connecting rod are respectively hinged to the outer wall of the tensioning and closing wire sleeve and the vertical section of the tire gripping clamp arm. A driving member for driving the hollow screw to rotate is installed on the screw support. The hollow screw is driven to rotate by the driving member, and the tensioning and closing wire sleeve moves forward and backward with the rotation of the hollow screw and drives the tensioning and closing connecting rod to swing, thereby driving the tire gripping clamp arm to move radially, thereby completing the tensioning and closing matching of the tire gripping clamp arm to the large-size tire.
[0009] The driving member includes a driving rod, a driving gear and a driven gear. The driving rod passes through the screw bracket and is rotatably connected to the screw bracket via a bearing. The driving gear is fixedly mounted on the driving rod located on the inner side of the screw bracket. The driven gear is fixedly mounted on the hollow screw and meshes with the driving gear for transmission.
[0010] The size adjustment assembly includes a locking pin, the driven gear is provided with a plurality of locking pin holes along the circumferential direction, the screw bracket is provided with a locking hole near one end of the driven gear, and the locking pin is inserted into the locking hole and the locking pin hole to lock the tire gripping clamp arm in the size adjustment assembly, thereby preventing the tire gripping clamp arm from radially shifting and causing the tire to loosen and fall off, thereby improving the safety of the device.
[0011] The driving end of the push screw and the end of the driving rod located outside the screw support are respectively fixed with hand wheels, and the size of the driving gear is smaller than that of the driven gear. The hand wheel drive mode is convenient for daily use, and the design of the small-sized driving gear can realize the labor-saving adjustment of the tire gripping clamp arm.
[0012] A split bearing seat is fixed to the inner side of the front end of the screw support, and an upper pressure cover is detachably installed at the connection hole at the rear end of the screw support. A bearing installation groove is provided on the inner wall where the upper pressure cover and the screw support meet, and the bearings at both ends of the hollow screw are respectively installed in the split bearing seat and the bearing installation groove. The design of the split bearing seat and the upper pressure cover facilitates the installation and maintenance of the hollow screw and the opening and closing wire sleeve in the screw support.
[0013] The front end of the push screw is provided with a push plate, one side of which is connected to the push screw via a ball joint structure, and the other side of the push plate forms the push surface. The ball joint installation of the push plate can disperse the unbalanced force generated when the tire is removed, thereby protecting the push screw and the axle hub of the tire.
[0014] The beneficial effects of the utility model are as follows: the height of the tire grabbing bracket is adjusted by the lifting assembly, and the length of the hook plate portion of the tire grabbing clamp arm extending out of the tire grabbing bracket is adjusted by the size adjusting assembly, so as to adapt to the large-size tire of the aircraft tractor, and the driving force is applied by the driving end of the pushing screw, and the front end of the pushing screw pushes the axle wheel hub of the tire. At this time, the cart body moves in the direction away from the tire under the reaction force of the pushing screw, and the tire grabbing bracket drives the tire to separate from the axle wheel hub through the tire grabbing clamp arm, so that the tire removal work is completed. The whole device is easy to operate, and the use process has high reliability, good stability, safety and efficiency, which reduces the labor intensity of maintenance personnel and improves the work efficiency of tire removal and assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 It is a partial schematic diagram of the size adjustment component in the utility model;
[0017] Figure 3 It is a partial schematic diagram of another angle of the size adjustment component in the utility model;
[0018] Figure 4 It is a structural schematic diagram of the main body of the cart in the utility model;
[0019] Figure 5 It is a structural schematic diagram of the tire gripping bracket in the utility model;
[0020] Figure 6 It is a structural schematic diagram of the tire grabbing clamp arm in the utility model;
[0021] Figure 7 It is a structural schematic diagram of the screw rod bracket in the utility model.
[0022] Reference numerals: 1. tire; 101. axle wheel hub; 2. cart body; 201. column; 2011. T-slot A; 202. rolling wheel; 3. tire gripping bracket; 301. through hole; 302. T-slot B; 303. T-sliding block A; 4. jacking screw rod; 5. jacking screw sleeve; 6. tire gripping clamp arm; 601. hook plate; 602. T-sliding block B; 7. hydraulic jack; 8. screw rod bracket; 801. connecting hole; 802, locking hole; 803, bearing mounting groove; 9, hollow screw; 10, opening and closing thread sleeve; 11, opening and closing connecting rod; 12, driving member; 1201, driving rod; 1202, driving gear; 1203, driven gear; 12031, locking pin hole; 13, locking pin; 14, ear plate; 15, push plate; 1501, ball joint structure; 16, hand wheel; 17, upper pressure cover; 18, split bearing seat; 19, handle. DETAILED DESCRIPTION
[0023] In order to enable those skilled in the art to better understand the technical solution in the utility model, the technical solution in the utility model is clearly and completely described below in conjunction with the accompanying drawings. Other embodiments obtained by those skilled in the art without making any creative work should all fall within the protection scope of the utility model.
[0024] like Figure 1 As shown, the utility model provides an aircraft tractor tire removal device, comprising a trolley body 2, a tire grabbing bracket 3, a tire grabbing clamp arm 6 and a push screw 4. The tire grabbing bracket 3 is installed on the trolley body 2 through a lifting assembly and moves vertically relative to the trolley body 2, such as Figure 4As shown, the cart body 2 is a U-shaped body, and a rolling wheel 202 is installed at the bottom of the U-shaped body. The rolling direction of the rolling wheel 202 is consistent with the opening direction of the U-shaped body, and the open end of the U-shaped body faces the tire 1 to be removed. Two columns 201 are fixed side by side on the closed end of the U-shaped body. A T-slot A2011 is opened in the vertical direction on the side of the column 201 facing the tire 1 to be removed. In order to facilitate the movement of the cart body 2, a handle 19 is fixed on the side of the column 201 facing away from the tire 1 to be removed. The lifting component is a hydraulic jack 7, and the hydraulic jack 7 is fixed on the U-shaped body between the two columns 201. The bottom of the tire grabbing bracket 3 is connected to the output end of the hydraulic jack 7, and T-shaped sliders A303 matching the T-slot A2011 are formed on both sides of the tire grabbing bracket 3. As the hydraulic jack 7 rises and falls, the tire grabbing bracket 3 moves vertically along the T-slot A2011. The tire grabbing bracket 3 is located on the side of the U-shaped vehicle body facing the tire 1 to be removed, which can ensure that the device has a stable center of gravity during use, avoids tilting forward, and improves the safety and reliability of the device.
[0025] The pushing screw rod 4 is connected to the tire grabbing bracket 3 via the pushing screw sleeve 5, the rear end of the pushing screw rod 4 is the driving end, the front end of the pushing screw rod 4 passes through the through hole 301 arranged in the middle of the tire grabbing bracket 3 and forms a pushing surface in contact with the axle wheel hub 101 of the tire to be removed, the tire grabbing clamp arm 6 is multiple and distributed circumferentially on the tire grabbing bracket 3, one end of the tire grabbing clamp arm 6 has a hook plate portion 601 for hooking the tire 1 to be removed, and the other end of the tire grabbing bracket 3 is equipped with a size adjustment component that drives it to move radially along the through hole 301. According to the center height of the aircraft tractor tire 1 to be disassembled, the hydraulic jack 7 is driven to lift the tire grabbing bracket 3 until its center through hole 301 is aligned with the center of the tire 1, and then the size adjustment component adjusts the length of the hook plate portion 601 of the tire grabbing clamp arm 6 extending out of the tire grabbing bracket 3 to adapt to the large-size tire 1 of the aircraft tractor to be disassembled, and by applying a driving force to the driving end of the pushing screw 4, the front end of the pushing screw 4 pushes the axle wheel hub 101 of the tire 1. At this time, the trolley body 2 moves in the direction away from the tire 1 under the reaction force of the pushing screw 4, and the tire grabbing bracket 3 drives the tire 1 to separate from the axle wheel hub 101 through the tire grabbing clamp arm 6, completing the disassembly of the tire 1. The use process of the entire device reduces the labor intensity of maintenance personnel and improves the work efficiency of disassembly and assembly of the tire 1.
[0026] like Figure 5 As shown, the tire gripping bracket 3 has a T-slot B302 radially opened along the through hole 301 on the side of the tire 1 to be removed. In this embodiment, there are four T-slots B302, which are distributed in a cross shape on the surface of the tire gripping bracket 3, and there are four tire gripping clamp arms 6. Figure 6As shown, each tire gripper arm 6 is a J-shaped structure, the curved section of the tire gripper arm 6 is the hook plate portion 601, and a T-shaped slider B602 matching the T-shaped slot B302 is formed on the outer side of the vertical section of the tire gripper arm 6.
[0027] like Figure 1 and Figure 2 As shown, the size adjustment assembly includes a screw support 8, a hollow screw 9, an opening and closing wire sleeve 10 and an opening and closing connecting rod 11. The front end of the screw support 8 is fixedly connected to the side of the tire gripping support 3 facing away from the tire 1 to be removed, and the rear end of the screw support 8 is fixedly connected to the push wire sleeve 5. Both ends of the screw support 8 are provided with connecting holes 801 for the push screw to pass through. The middle part of the screw support 8 has an installation chamber. The hollow screw 9 is sleeved on the push screw inside the installation chamber, and both ends of the hollow screw 9 are connected to the wire sleeve 5 through bearings. The rod bracket 8 is rotatably connected, the said tensioning and closing wire sleeve 10 is connected with the hollow screw 9, and the two ends of the said tensioning and closing connecting rod 11 are respectively hinged with the outer wall of the tensioning and closing wire sleeve 10 and the vertical section of the tire grabbing clamp arm 6. Specifically, the outer wall of the tensioning and closing wire sleeve 10 is fixed with four groups of ear plates 14 along the circumferential direction, and the outer side of the vertical end of each tire grabbing clamp arm 6 is fixed with a corresponding group of ear plates 14. The two ends of the tensioning and closing connecting rod 11 are respectively rotatably connected with the ear plates 14 through hinged columns, and the said screw bracket 8 is installed with a driving member 12 for driving the hollow screw 9 to rotate. Specifically, as Figure 3 As shown, the driving member 12 includes a driving rod 1201, a driving gear 1202 and a driven gear 1203. The driving rod 1201 passes through the screw bracket 8 and is rotatably connected to the screw bracket 8 via a bearing. The driving gear 1202 is fixedly mounted on the driving rod 1201 located on the inner side of the screw bracket 8. The driven gear 1203 is fixedly mounted on the hollow screw 9 and meshes with the driving gear 1202 for transmission. Preferably, the driven gear 1203 is arranged near the rear end of the screw bracket 8, and the driving rod 1201 is arranged parallel to the pushing screw 4; and the driving end of the pushing screw 4 and the end of the driving rod 1201 located on the outer side of the screw bracket 8 are respectively fixed with a hand wheel 16. In order to save effort in opening and closing the tire clamp arm 6, the size of the driving gear 1202 is smaller than that of the driven gear 1203.
[0028] The hand wheel 16 on the driving rod 1201 is turned to drive the hollow screw 9 to rotate, and the opening and closing wire sleeve 10 moves forward and backward with the rotation of the hollow screw 9. At this time, the opening and closing swing of the opening and closing connecting rod 11 drives the tire gripping clamp arm 6 to move radially along the T-slot B302, thereby completing the opening and closing matching of the tire gripping clamp arm 6 to the large-size tire 1.
[0029] The size adjustment component also includes a locking pin 13, and the driven gear 1203 is provided with a plurality of locking pin holes 12031 along the circumferential direction. The front end of the screw bracket 8 is provided with a locking hole 802. When the tire gripper arm 6 is adapted to and clamps the tire 1, the locking pin 13 is passed through the locking hole 802 and the corresponding locking pin hole 12031 in sequence to lock the tire gripper arm 6 in the size adjustment component, thereby preventing the tire gripper arm 6 from radially shifting and causing the tire 1 to loosen and fall off, thereby improving the safety of the device.
[0030] like Figure 7 As shown, a split bearing seat 18 is fixed to the inner side of the front end of the screw support 8, and an upper pressure cover 17 is detachably installed at the connection hole 801 at the rear end of the screw support 8. A bearing installation groove 803 is provided on the inner wall of the upper pressure cover 17 and the screw support 8, and the bearings at both ends of the hollow screw 9 are respectively installed in the split bearing seat 18 and the bearing installation groove 803. The design of the split bearing seat 18 and the upper pressure cover 17 improves the convenience of installation and maintenance of the hollow screw 9 and the tensioning and closing wire sleeve 10 in the screw support 8.
[0031] like Figure 2 As shown, a push plate 15 is provided at the front end of the push screw 4, one side of the push plate 15 is connected to the push screw 4 via a ball joint structure 1501, and the other side of the push plate 15 forms the push surface. The ball joint structure at the end of the push plate 15 and the push screw 4 can disperse the unbalanced force generated during the removal of the tire 1 when the push plate 15 applies a push force to the axle hub 101, thereby protecting the push screw 4 and the surface of the axle hub 101.
[0032] When implementing the technical solution, the nut between the rim of the tire 1 to be removed and the axle wheel hub 101 is removed in advance, and the device is pushed to the tire 1 to be removed by the handle 19. According to the center height of the tire 1, the hydraulic jack 7 is started to raise the tire gripping bracket 3 until its through hole 301 is roughly aligned with the center position of the tire 1, and the hand wheel 16 at the outer end of the driving rod 1201 is rotated forward, and the hollow screw 9 drives the tensioning and closing wire sleeve 10 to move forward. At this time, the tensioning and closing connecting rod 11 drives the tire gripping clamp arm 6 to open, and pushes the cart body 2 forward so that the open end of the cart body 2 is inserted into the outside of the tire 1, and the hand wheel 16 at the outer end of the driving rod 1201 is rotated in the opposite direction, and the hollow screw 9 drives the tensioning and closing wire sleeve 10 to move backward until the hook plate portion 60 of the tire gripping clamp arm 6 is engaged. 1 clamps the tire 1, and inserts the locking pin 13 through the locking hole 802 of the screw support 8 and into the locking pin hole 12031 of the driven gear 1203 to fix the tire gripping clamp arm 6. At this time, the hand wheel 16 at the rear end of the jacking screw 4 is rotated forward, and the jacking screw 4 drives the jacking plate 15 to move forward and press against the surface of the axle hub 101 of the tire 1. As the jacking screw 4 continues to rotate, the trolley body 2 moves in a direction away from the tire 1 under the reaction force of the jacking screw 4, and then the tire 1 is separated from the axle hub 101 under the pulling of the tire gripping clamp arm 6, completing the removal of the tire 1. The use process has high reliability, good stability, safety and efficiency, and can be applied to large-size tires 1 of aircraft tractors of different models.
Claims
1. An aircraft tractor tire removal device, characterized in that: The tire grabbing bracket comprises a trolley body, a tire grabbing bracket, a tire grabbing clamp arm and a pushing screw rod. The tire grabbing bracket is installed on the trolley body via a lifting assembly and moves vertically relative to the trolley body. The pushing screw rod is connected to the tire grabbing bracket via a pushing screw sleeve. The rear end of the pushing screw rod is a driving end. The front end of the pushing screw rod passes through a through hole arranged in the middle of the tire grabbing bracket and forms a pushing surface that contacts the axle wheel hub of the tire to be removed. There are multiple tire grabbing clamp arms distributed circumferentially on the tire grabbing bracket. One end of the tire grabbing clamp arm has a hook plate portion for hooking the tire to be removed. The other end of the tire grabbing bracket is equipped with a size adjustment assembly that drives it to move radially along the through hole.
2. The aircraft tractor tire removal device according to claim 1, characterized in that: The main body of the cart is a U-shaped body, and rolling wheels are installed on the bottom of the U-shaped body. The open end of the U-shaped body faces the tire to be removed, and two columns are fixed side by side on the closed end of the U-shaped body. The column is provided with a T-slot A in the vertical direction on the side facing the tire to be removed. The lifting assembly is a hydraulic jack, and the hydraulic jack is fixed on the U-shaped body between the two columns. The bottom of the tire grabbing bracket is connected to the output end of the hydraulic jack, and T-shaped sliders A matching the T-slots A are formed on both sides of the tire grabbing bracket.
3. The aircraft tractor tire removal device according to claim 1 or 2, characterized in that: The tire grabbing bracket is provided with a T-slot B radially along the through hole on the side of the tire to be removed, the tire grabbing clamp arm is a J-shaped structure, the curved section of the tire grabbing clamp arm is the hook plate portion, and a T-slot slider B matching the T-slot B is formed on the outer side of the vertical section of the tire grabbing clamp arm.
4. The aircraft tractor tire removal device according to claim 3, characterized in that: The size adjustment assembly includes a screw rod bracket, a hollow screw, an opening and closing wire sleeve and an opening and closing connecting rod. The front end of the screw rod bracket is fixedly connected to the side of the tire grabbing bracket facing away from the tire to be removed, and the rear end of the screw rod bracket is fixedly connected to the pushing wire sleeve. Both ends of the screw rod bracket are provided with connecting holes for the pushing wire screw to pass through. The middle part of the screw rod bracket is provided with an installation chamber. The hollow screw is sleeved on the pushing wire screw on the inner side of the installation chamber, and both ends of the hollow screw are rotatably connected to the screw rod bracket via bearings. The opening and closing wire sleeve is cooperatively connected with the hollow screw, and both ends of the opening and closing connecting rod are respectively hinged to the outer wall of the opening and closing wire sleeve and the vertical section of the tire grabbing clamp arm, and a driving member for driving the hollow screw to rotate is installed on the screw rod bracket.
5. The aircraft tractor tire removal device according to claim 4, characterized in that: The driving member includes a driving rod, a driving gear and a driven gear. The driving rod passes through the screw bracket and is rotatably connected to the screw bracket via a bearing. The driving gear is fixedly mounted on the driving rod located on the inner side of the screw bracket. The driven gear is fixedly mounted on the hollow screw and meshes with the driving gear for transmission.
6. The aircraft tractor tire removal device according to claim 5, characterized in that: The size adjustment component includes a locking pin, the driven gear is provided with a plurality of locking pin holes along the circumferential direction, the screw support is provided with a locking hole at one end close to the driven gear, and the locking pin is inserted into the locking hole and the locking pin hole to lock the size adjustment component.
7. The aircraft tractor tire removal device according to claim 5 or 6, characterized in that: A hand wheel is fixed to the driving end of the push screw and the end of the driving rod located outside the screw support respectively, and the size of the driving gear is smaller than that of the driven gear.
8. The aircraft tractor tire removal device according to claim 4, characterized in that: A split bearing seat is fixed on the inner side of the front end of the screw bracket, and an upper pressure cover is detachably installed at the connecting hole at the rear end of the screw bracket. A bearing mounting groove is opened on the inner wall where the upper pressure cover and the screw bracket meet, and the bearings at both ends of the hollow screw are respectively installed in the split bearing seat and the bearing mounting groove.
9. The aircraft tractor tire removal device according to claim 1, 2, 4, 5 or 6, characterized in that: A push plate is provided at the front end of the push screw rod, one side of the push plate is connected to the push screw rod via a ball joint structure, and the other side of the push plate forms the push surface.