Undercarriage holding and clamping mechanism with transverse clamping function

Abstract

The invention provides an undercarriage holding and clamping mechanism with a transverse clamping function. The undercarriage holding and clamping mechanism comprises a main heavy frame, a holding and clamping action mechanism, a transverse clamping and stabilizing mechanism and a lifting and lifting mechanism. A clamping action mechanism is mounted on the main heavy frame, and the airplane wheel is clamped through the clamping action mechanism; a transverse clamping and stabilizing mechanism is mounted on the rear side of the main heavy frame, and transverse limiting of the airplane wheels is achieved through the transverse clamping and stabilizing mechanism; a lifting mechanism is installed on the main heavy frame and used for lifting the holding and clamping action mechanism and the transverse clamping and stabilizing mechanism. The two-degree-of-freedom restraint mechanism can restrain two degrees of freedom in the plane of the airplane wheel, including transverse movement and longitudinal movement of the airplane wheel in the mechanism, is suitable for operation of an airplane with a small turning radius, and can effectively prevent the phenomenon that the airplane wheel falls off due to transverse shaking of the airplane wheel in the clamping mechanism under special conditions; the use effect is good, and popularization and use can be achieved.

Description

Technical Field

[0001] The invention relates to a landing gear clamping and guiding device of a rodless wheel-holding tractor with an omnidirectional motion chassis, and in particular to a landing gear clamping mechanism with a transverse clamping function. Background Art

[0002] Aircraft tractors usually need to be manually driven, which requires the design of the tractor to leave space for the driver's cab, and the size of the tractor will also increase accordingly. When an aircraft needs to enter a hangar that is small due to its early construction, ordinary tractors cannot fully tow the aircraft into the hangar, so an unmanned tractor that can move in all directions and is small in size is urgently needed.

[0003] The wheel clamping mechanism of an aircraft tractor is used to clamp and fix the aircraft wheel. The existing aircraft tractor wheel clamping mechanism is generally designed to only consider the longitudinal fixation of the aircraft wheel. When the aircraft needs to move in a small space, the aircraft needs to turn with a small radius. At this time, the lateral shaking amplitude of the aircraft wheel in the clamping mechanism will be large, which may cause the aircraft wheel to be out of the safe position in serious cases. Therefore, it is urgent to design a clamping mechanism that takes into account both longitudinal and lateral clamping functions. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a landing gear clamping mechanism with a lateral clamping function in view of the deficiencies of the above-mentioned prior art. The device can realize the constraint of two degrees of freedom of the aircraft wheel in the horizontal plane, including the lateral movement and longitudinal movement of the wheel in the mechanism. It is suitable for the operation of aircraft with a small turning radius and can effectively prevent the aircraft wheel from shaking laterally in the clamping mechanism and causing the wheel to fall off under special circumstances.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a landing gear clamping mechanism with a lateral clamping function, characterized in that it includes a main load-bearing frame, a clamping action mechanism, a lateral clamping stabilizing mechanism and a lifting and supporting mechanism; The main bearing frame is provided with a clamping action mechanism, through which the machine wheel is clamped; the rear side of the main bearing frame is provided with a lateral clamping and stabilizing mechanism, through which the lateral clamping and stabilizing mechanism is used to achieve lateral position limitation of the machine wheel; the main bearing frame is provided with a lifting and supporting mechanism for lifting the clamping action mechanism and the lateral clamping and stabilizing mechanism; Preferably, the main load-bearing frame includes a base plate and a rear end connecting block, the rear end connecting block is fixedly connected to the rear side of the base plate, the front side of the base plate is symmetrically fixedly connected with a left vertical plate and a right vertical plate for connecting a lifting and supporting mechanism, and the rear end connecting block is connected to a transverse clamping stabilization mechanism.

[0006] Preferably, the clamping action mechanism includes a connecting member, a left telescopic arm, a left rotary arm, a right telescopic arm and a right rotary arm. The connecting member is fixedly connected to the main load-bearing frame. The left telescopic arm and the right telescopic arm are symmetrically connected to both sides of the connecting member. The left rotary arm is connected to the action end of the left telescopic arm, and the right rotary arm is connected to the action end of the right telescopic arm.

[0007] Preferably, both the left telescopic arm and the right telescopic arm include a telescopic main body, a slide rail, a lead screw and a screw rod. The slide rail is fixedly installed on the main load-bearing frame. The telescopic main body is slidably installed in the slide rail. A lead screw for driving the linear movement of the telescopic main body is installed in the telescopic main body. A first screw rod is installed at the front end of the telescopic main body. The telescopic upper cover is fixedly connected to the telescopic main body by bolts, and a slide rail cover is provided on the slide rail.

[0008] Preferably, both the left rotary arm and the right rotary arm include a rotary main body and a first threaded slider. The rear end of the rotary main body is slidably connected to the first threaded slider. The first threaded slider is threadedly connected to the first screw rod. A left pushing block and a right pushing block are respectively hinged on the two rotary main bodies. The longitudinal displacement freedom and rolling freedom of the machine wheel are restricted by the left pushing block and the right pushing block. The clamping of the machine wheel is realized by the telescopic movement of the lead screw and the torsion of the rotary arm.

[0009] Preferably, the lateral clamping and stabilizing mechanism includes a fixed cover, a left clamping frame and a right clamping frame. The left clamping frame and the right clamping frame are symmetrically hinged on both sides of the fixed cover. The left clamping frame includes a left long rod, a left transverse clamping rod and a left diagonal brace. One end of the left long rod is hinged to the fixed cover, and the other end of the left long rod is hinged to the left transverse clamping rod. A left diagonal brace is hinged between the left transverse clamping rod and the fixed cover. The right clamping frame includes a right long rod, a right transverse clamping rod and a right diagonal brace. One end of the right long rod is hinged to the fixed cover, and the other end of the right long rod is hinged to the right transverse clamping rod. A right diagonal brace is hinged between the right transverse clamping rod and the fixed cover. One side of the fixed cover is fixedly connected to a transverse clamping base. The transverse clamping base is simultaneously fixedly connected to a rear-end connecting block. The transverse clamping base is threadedly connected to a second screw rod. A second threaded slider is threadedly connected to the second screw rod. A left short rod is hinged between the second threaded slider and the left transverse clamping rod, and a right short rod is hinged between the second threaded slider and the right transverse clamping rod. The left long rod and the right long rod are hinged to the rear-end connecting block, and the fixed cover is fixedly connected to the rear-end connecting block.

[0010] Preferably, the lifting and supporting mechanism comprises a left supporting frame and a right supporting frame, wherein the left supporting frame and the right supporting frame are symmetrically connected to the left and right sides of the main load-bearing frame, wherein the left supporting frame comprises a left support frame, a left screw housing and a left double-ear screw, wherein the left support frame is connected to the left screw housing via a left load-bearing bearing, wherein the left support frame is connected to the left vertical plate via a left main frame sleeve, wherein one end of the left double-ear screw is installed in the left screw housing, and wherein the action end of the left double-ear screw is connected to the left vertical plate via a left screw sleeve. The right supporting frame comprises a right support frame, a right screw housing and a right double-ear screw, wherein the right support frame is connected to the right screw housing via a right load-bearing bearing, wherein the right support frame is connected to the right vertical plate via a right main frame sleeve, wherein one end of the right double-ear screw is installed in the right screw housing, and wherein the action end of the right double-ear screw is connected to the right vertical plate via a right screw sleeve.

[0011] Compared with the prior art, the present invention has the following advantages: 1. The invention has scientific and reasonable structural design, comprehensive functions, strong practicability, stable and reliable clamping, high safety, and can be widely used.

[0012] 2. The present invention installs a clamping action mechanism on the main load-bearing frame, and clamps the machine wheel by the left and right clamps of the clamping action mechanism; a transverse clamping stabilization mechanism is installed on the rear side of the main load-bearing frame, and the transverse clamping stabilization mechanism is used to achieve lateral limitation of the machine wheel; a lifting and supporting mechanism is installed on the main load-bearing frame for lifting the clamping action mechanism and the transverse clamping stabilization mechanism.

[0013] 3. During the process of transporting an aircraft, the present invention can ensure that the aircraft wheels are firmly fixed on the tractor, while allowing the wheels to have a slight relative movement in a specified direction relative to the tractor to prevent the tractor from generating additional force on the aircraft when crossing a cut or ditch. The clamping mechanism can effectively limit the horizontal and longitudinal displacement freedom of the wheels on the horizontal plane, and release a certain degree of freedom in the vertical direction. The rolling freedom of the wheels can be effectively limited to avoid the wheels rolling on the ground for a long time as much as possible, while ensuring safety during the transportation process.

[0014] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the main load-bearing frame in the present invention.

[0017] Figure 3 It is a structural schematic diagram of the clamping action mechanism in the present invention.

[0018] Figure 4 It is a structural schematic diagram of the transverse clamping stabilizing mechanism in the present invention.

[0019] Figure 5 It is a structural schematic diagram of the lifting and lifting mechanism in the present invention.

[0020] Figure 6 It is a structural schematic diagram of the present invention in an initial state.

[0021] Figure 7 It is a structural schematic diagram of the present invention in a clamped state.

[0022] Figure 8 It is a structural schematic diagram of the present invention in a jacking state.

[0023] Description of reference numerals: DETAILED DESCRIPTION

[0024] like Figures 1 to 5 As shown, the present invention comprises a main load-bearing frame 1, a clamping action mechanism 2, a lateral clamping stabilizing mechanism 3 and a lifting and supporting mechanism 4; The main bearing frame 1 is provided with a clamping action mechanism 2, through which the aircraft wheel is clamped; the rear side of the main bearing frame 1 is provided with a lateral clamping and stabilizing mechanism 3, through which the lateral clamping and stabilizing mechanism 3 is used to achieve lateral positioning of the aircraft wheel; the main bearing frame 1 is provided with a lifting and supporting mechanism 4 for lifting the clamping action mechanism 2 and the lateral clamping and stabilizing mechanism 3; In this embodiment, the main load-bearing frame 1 includes a base plate 101 and a rear end connecting block 102, the rear end connecting block 102 is fixedly connected to the rear side of the base plate 101, and the front side of the base plate 101 is symmetrically fixedly connected with a left vertical plate 103 and a right vertical plate 104 for connecting the lifting and supporting mechanism 4, and the rear end connecting block 102 is connected to the transverse clamping stabilization mechanism 3.

[0025] In this embodiment, the clamping action mechanism 2 includes a connecting member 201, a left telescopic arm 202, a left swivel arm 203, a right telescopic arm 204 and a right swivel arm 205. The connecting member 201 is fixedly connected to the main load-bearing frame 1, the left telescopic arm 202 and the right telescopic arm 204 are symmetrically connected on both sides of the connecting member 201, the left swivel arm 203 is connected to the action end of the left telescopic arm 202, and the right swivel arm 205 is connected to the action end of the right telescopic arm 204.

[0026] In this embodiment, the left telescopic arm 202 and the right telescopic arm 204 both include a telescopic main body 221, a slide rail 223, a lead screw 225, and a screw rod 226. The slide rail 223 is fixedly installed on the main load-bearing frame 1. The telescopic main body 221 is slidably installed in the slide rail 223. A lead screw 225 for driving the linear movement of the telescopic main body 221 is installed in the telescopic main body 221. A first screw rod 226 is installed at the front end of the telescopic main body 221. A telescopic upper cover 222 is fixedly connected to the telescopic main body 221 by bolts. A slide rail cover 224 is provided on the slide rail 223.

[0027] In this embodiment, the left rotary arm 203 and the right rotary arm 205 both include a rotary main body 231 and a first thread slider 232. The rear end of the rotary main body 231 is slidably connected to the first thread slider 232. The first thread slider 232 is threadedly connected to the first screw rod 226. A left push block 206 and a right push block 207 are respectively hinged on the two rotary main bodies 231. The longitudinal displacement freedom and rolling freedom of the wheels are restricted by the left push block 206 and the right push block 207. The clamping of the wheels is achieved by the telescoping of the lead screw 225 and the torsion of the rotary arms.

[0028] In this embodiment, the lateral clamping and stabilizing mechanism 3 includes a fixed cover 305, a left clamping frame, and a right clamping frame. The left clamping frame and the right clamping frame are symmetrically hinged on both sides of the fixed cover 305. The left clamping frame includes a left long rod 303, a left transverse clamping rod 304, and a left diagonal strut 302. One end of the left long rod 303 is hinged to the fixed cover 305. The other end of the left long rod 303 is hinged to the left transverse clamping rod 304. A left diagonal strut 302 is hinged between the left transverse clamping rod 304 and the fixed cover 305. The right clamping frame includes a right long rod 3031, a right transverse clamping rod 3041, and a right diagonal strut 3021. One end of the right long rod 3031 is hinged to the fixed cover 305. The other end of the right long rod 3031 is hinged to the right transverse clamping rod 3041. A right diagonal strut 3021 is hinged between the right transverse clamping rod 3041 and the fixed cover 305. A transverse clamping base 306 is fixedly connected to one side of the fixed cover 305. The transverse clamping base 306 is also fixedly connected to the rear end connection block 102. The transverse clamping base 306 is threadedly connected to a second screw rod 307. A second thread slider 308 is threadedly connected to the second screw rod 307. A left short rod 301 is hinged between the second thread slider 308 and the left transverse clamping rod 304. A right short rod 3011 is hinged between the second thread slider 308 and the right transverse clamping rod 3041. The left long rod 303 and the right long rod 3031 are hinged to the rear end connection block 102. The fixed cover 305 is fixedly connected to the rear end connection block 102.

[0029] In this embodiment, the lifting and supporting mechanism 4 includes a left supporting frame and a right supporting frame. The left supporting frame and the right supporting frame are symmetrically connected to the left and right sides of the main load-bearing frame 1. The left supporting frame includes a left support 401, a left lead screw housing 403, and a left double-ear lead screw 402. The left support 401 is connected to the left lead screw housing 403 through a left bearing 404, and the left support 401 is connected to the left vertical plate 103 through a left main frame bushing 406. One end of the left double-ear lead screw 402 is installed in the left lead screw housing 403, and the moving end of the left double-ear lead screw 402 is connected to the left vertical plate 103 through a left lead screw bushing 405. The right supporting frame includes a right support 4011, a right lead screw housing 4031, and a right double-ear lead screw 4021. The right support 4011 is connected to the right lead screw housing 4031 through a right bearing 4041, and the right support 4011 is connected to the right vertical plate 104 through a right main frame bushing 4061. One end of the right double-ear lead screw 4021 is installed in the right lead screw housing 4031, and the moving end of the right double-ear lead screw 4021 is connected to the right vertical plate 104 through a right lead screw bushing 4051.

[0030] The present invention has three states during use: initial state, clamping state, and jacking state. In the initial state: as Figure 6 shown, the left double-ear lead screw 402 and the right double-ear lead screw 4021 extend, making the geometric plane where the main load-bearing frame 1, the lifting and clamping action mechanism 2, and the lateral clamping and stabilizing mechanism 3 are located parallel to the ground. The left telescopic arm 202 and the right telescopic arm 204 extend, the left rotary arm 203 and the right rotary arm 205 open, and the second threaded slider 308 moves to the position where the left short rod 301 and the right short rod 3011 are collinear.

[0031] In the clamping state: as Figure 7 shown, the left telescopic arm 202 and the right telescopic arm 204 retract, the left rotary arm 203 and the right rotary arm 205 retract to the collinear position, the left pushing block 206 and the right pushing block 207 abut against the rear of the wheel, and the second threaded slider 308 moves backward to clamp the wheel through the left transverse clamping rod 304 and the right transverse clamping rod 3041.

[0032] In the jacking state: as Figure 8 shown, the left double-ear lead screw 402 and the right double-ear lead screw 4021 retract, and the main load-bearing frame 1, the lifting and clamping action mechanism 2, and the lateral clamping and stabilizing mechanism 3 are lifted.

[0033] The above is only a preferred embodiment of the present invention and does not impose any limitations on the present invention. Any simple modifications, changes, and equivalent variations made to the above embodiments based on the technical essence of the invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A landing gear clamping mechanism with a lateral clamping function, characterized in that: It comprises a main load-bearing frame (1), a clamping action mechanism (2), a lateral clamping stabilization mechanism (3) and a lifting and supporting mechanism (4); The main load-bearing frame (1) is provided with a clamping action mechanism (2) for clamping the machine wheel via the clamping action mechanism (2); a transverse clamping stabilization mechanism (3) is provided on the rear side of the main load-bearing frame (1) for achieving transverse position limitation of the machine wheel via the transverse clamping stabilization mechanism (3); and a lifting and supporting mechanism (4) is provided on the main load-bearing frame (1) for lifting the clamping action mechanism (2) and the transverse clamping stabilization mechanism (3).

2. A landing gear clamping mechanism with a lateral clamping function according to claim 1, characterized in that: The main load-bearing frame (1) comprises a base plate (101) and a rear end connection block (102), wherein the rear end connection block (102) is fixedly connected to the rear side of the base plate (101), and a left vertical plate (103) and a right vertical plate (104) for connecting to a lifting and supporting mechanism (4) are symmetrically fixedly connected to the front side of the base plate (101), and the rear end connection block (102) is connected to the transverse clamping and stabilizing mechanism (3).

3. The landing gear clamping mechanism with lateral clamping function according to claim 1, characterized in that: The clamping action mechanism (2) comprises a connecting member (201), a left telescopic arm (202), a left swivel arm (203), a right telescopic arm (204) and a right swivel arm (205); the connecting member (201) is fixedly connected to the main load-bearing frame (1); the left telescopic arm (202) and the right telescopic arm (204) are symmetrically connected on both sides of the connecting member (201); the left swivel arm (203) is connected to the action end of the left telescopic arm (202); and the right swivel arm (205) is connected to the action end of the right telescopic arm (204).

4. A landing gear clamping mechanism with a lateral clamping function according to claim 3, characterized in that: The left telescopic arm (202) and the right telescopic arm (204) both comprise a telescopic body (221), a slide rail (223), a lead screw (225) and a screw rod (226); the slide rail (223) is fixedly mounted on the main load-bearing frame (1); the telescopic body (221) is slidably mounted in the slide rail (223); a lead screw (225) for driving the telescopic body (221) to move linearly is mounted in the telescopic body (221); and a first screw rod (226) is mounted at the front end of the telescopic body (221).

5. A landing gear clamping mechanism with a lateral clamping function according to claim 4, characterized in that: The left swivel arm (203) and the right swivel arm (205) both comprise a swivel body (231) and a first threaded slider (232); the rear end of the swivel body (231) is slidably connected to the first threaded slider (232); the first threaded slider (232) is threadedly connected to the first screw rod (226); a left push block (206) and a right push block (207) are respectively hinged on the two swivel bodies (231); the longitudinal displacement freedom and rolling freedom of the wheel are limited by the left push block (206) and the right push block (207).

6. The landing gear clamping mechanism with lateral clamping function according to claim 2, characterized in that: The transverse clamping stabilizing mechanism (3) comprises a fixed cover (305), a left clamping frame and a right clamping frame. The left clamping frame and the right clamping frame are symmetrically hinged on both sides of the fixed cover (305). The left clamping frame comprises a left long rod (303), a left transverse clamping rod (304) and a left diagonal support rod (302). One end of the left long rod (303) is hinged to the fixed cover (305), and the other end of the left long rod (303) is hinged to the left transverse clamping rod (304). The left diagonal support rod (302) is hinged between the left transverse clamping rod (304) and the fixed cover (305). The right clamping frame comprises a right long rod (3031), a right transverse clamping rod (3041) and a right diagonal support rod (3021). One end of the right long rod (3031) is hinged to the fixed cover (305), and the other end of the right long rod (3031) is hinged to the right transverse clamping rod (3041). A right diagonal support rod (3021) is hinged between the right transverse clamp rod (3041) and the fixed cover (305); one side of the fixed cover (305) is fixedly connected to the transverse clamp base (306), and the transverse clamp base (306) is also fixedly connected to the rear end connection block (102); the transverse clamp base (306) is threadedly connected to a second screw rod (307), and the second screw rod (307) is threadedly connected to a second threaded slider (308); a left short rod (301) is hingedly connected between the second threaded slider (308) and the left transverse clamp rod (304); a right short rod (3011) is hingedly connected between the second threaded slider (308) and the right transverse clamp rod (3041); the left long rod (303) and the right long rod (3031) are hingedly connected to the rear end connection block (102), and the fixed cover (305) is fixedly connected to the rear end connection block (102).

7. The landing gear clamping mechanism with lateral clamping function according to claim 2, characterized in that: The lifting and supporting mechanism (4) comprises a left supporting frame and a right supporting frame, wherein the left supporting frame and the right supporting frame are symmetrically connected to the left and right sides of the main load-bearing frame (1), wherein the left supporting frame comprises a left support frame (401), a left screw housing (403) and a left double-ear screw (402), wherein the left support frame (401) is connected to the left screw housing (403) via a left load-bearing bearing (404), wherein the left support frame (401) is connected to the left vertical plate (103) via a left main frame shaft sleeve (406), wherein one end of the left double-ear screw (402) is installed in the left screw housing (403), and the action end of the left double-ear screw (402) is connected to the left vertical plate (103) via a left main frame shaft sleeve (406). The lead screw shaft sleeve (405) is connected to the left vertical plate (103); the right lifting frame comprises a right support frame (4011), a right lead screw housing (4031) and a right double-ear lead screw (4021); the right support frame (4011) is connected to the right lead screw housing (4031) via a right load-bearing bearing (4041); the right support frame (4011) is connected to the right vertical plate (104) via a right main frame shaft sleeve (4061); one end of the right double-ear lead screw (4021) is installed in the right lead screw housing (4031); and the action end of the right double-ear lead screw (4021) is connected to the right vertical plate (104) via a right lead screw shaft sleeve (4051).

8. The landing gear clamping mechanism with lateral clamping function according to claim 4, characterized in that: The telescopic main body (221) is fixedly connected to a telescopic upper cover (222) via bolts, and a slide rail cover (224) is provided on the slide rail (223).

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