CN115817081A - Wheel lifting device adaptive to amphibious rescue boat - Google Patents

Abstract

The invention discloses a wheel lifting device adaptive to an amphibious rescue boat, which comprises a hub assembly, a steering connector, a joint sleeve, a swing arm A, a swing arm seat A, a connecting sleeve, a swing arm B, a connecting plate, a swing arm seat B, a shock absorber assembly, a shock absorber rotating arm, a hydraulic cylinder rotating arm, a rotating arm seat, a hydraulic cylinder seat, a frame assembly, a hull shell, a guide plate A, a guide plate B and a pull wire. The device can lift the wheel assembly upwards by more than 300 mm within seconds and can quickly collect all wheels in the hull, thereby not only obviously reducing the running resistance on the water surface, but also greatly improving the reliability of quick resetting and aligning after the rescue boat overturns.

Description

Wheel lifting device adaptive to amphibious rescue boat

Technical Field

The invention relates to a wheel lifting device consisting of hydraulic and mechanical components, in particular to a wheel lifting device which is adaptive to an amphibious rescue boat and can meet the requirements of quickly realizing a self-righting function and obviously reducing running resistance on the water surface.

Background

The water surface running speed of the amphibious rescue boat is an important index for measuring the comprehensive performance of the amphibious rescue boat, and researches and experiments show that the first factor influencing the water surface running speed of the amphibious rescue boat is 'shape resistance' caused by the shape and the volume of the vehicle body and the wheels immersed in water; therefore, the wheels are lifted upwards or even leave the water surface as far as possible, and the method is the most economical and effective method for improving and increasing the water surface running speed of the amphibious rescue boat; the self-righting function is also a basic function which the amphibious rescue boat must have, the amphibious rescue boat is easy to overturn due to too fast turning speed or too high transverse wave when running on the water surface, so the self-righting device is generally assembled for the amphibious rescue boat, however, all wheels must be completely collected in the boat body (namely the hull shell) to ensure that the overturning-state amphibious rescue boat can be overturned to return to the right and reset smoothly, and a wheel lifting device specially arranged for the amphibious rescue boat is required.

The invention patent number is ZL 201710297795.0, named as 'a wheel lifting device' invented by the applicant, and the disclosed technical scheme is as follows: the device comprises a hydraulic cylinder (1), a bolt (2), a turntable (3), a positioning disc (4), a supporting arm (5), a damping arm (6), a mandrel (7), a base (8), an upper swing arm (9), a lower swing arm (10), a swing arm seat (11), a damper (12), a hub connecting plate (13), a hub bearing unit (14), a rim (15) and a cylinder seat (16); the hydraulic lifting device is characterized in that when a telescopic rod of a hydraulic cylinder (1) extends outwards, a pushing turntable (3) rotates clockwise by taking a mandrel (7) as a circle center and drives a supporting arm (5) and a damping arm (6) to synchronously rotate clockwise, so that an upper swing arm (9), a damper (12) and a lower swing arm (10) deflect upwards in an orderly and coordinated manner, and a hub connecting plate (13), a hub bearing unit (14) and a rim (15) which are sequentially connected with the hub connecting plate are driven to rapidly lift upwards; on the contrary, when the telescopic rod of the hydraulic cylinder (1) is retracted inwards, the rotary table (3) is driven to rotate anticlockwise by taking the mandrel (7) as a circle center, the supporting arm (5), the upper swing arm (9), the damping arm (6) and the lower swing arm (10) rotate anticlockwise together, and therefore the hub connecting plate (13), the hub bearing unit (14) and the rim (15) are caused to descend downwards, and when the telescopic rod of the hydraulic cylinder (1) is retracted completely, the rim (15) can be reset to the initial position before lifting.

The invention patent with the patent number ZL202020691406.X and the name of 'a wheel deflecting and folding device of an amphibious vehicle and boat' invented by the applicant discloses the technical scheme as follows: the hydraulic steering mechanism comprises a transmission side box (1), an upper rocker arm assembly (2), an upper rocker arm seat (3), a lower rocker arm assembly (4), a lower rocker arm seat (5), a mandrel (6), a shock absorber assembly (7), a rocker arm (8), a rocker arm seat (9), a hydraulic oil cylinder/electric push rod (10), an oil cylinder mounting seat (11), a steering wheel shaft (12), a wheel assembly (13) and a fastening bolt (14); the transmission side box (1) is characterized by comprising a box body (1 a), an input shaft (1 b), a gear combination (1 c) and an output shaft (1 d); the upper rocker arm assembly (2) is orderly connected and assembled with a shaft core hole (1 h) at the upper part of a box body (1 a) of the rear wheel transmission side box (1) through a shaft core (6); the lower rocker arm assembly (4) is orderly connected and assembled with shaft cores (1 p) on two sides of the middle part of a box body (1 a) of the rear wheel transmission side box (1) through a mandrel (6); the shock absorber assembly (7) is sequentially connected and assembled with the rotating arm (8) and the lower rocker arm assembly (4) through the mandrel (6); the rotating arm (8) is orderly connected and assembled on the rotating arm seat (9); the hydraulic oil cylinder/electric push rod (10) is sequentially connected and assembled with the rotating arm (8) and the oil cylinder mounting seat (11) through the mandrel (6); one steering wheel shaft (12) of the two steering wheel shafts (12) is sleeved on a shaft core (1 e) at the upper part of the box body (1 a) through a shaft core hole (12 a), a rotating shaft (12 b) of the steering wheel shaft (12) is orderly connected with a shaft core hole (2 a) at the outer end of the front wheel upper rocker arm assembly (2), the other steering wheel shaft (12) is sleeved on a steering wheel shaft seat (1 f) at the inner side of the middle part of the box body (1 a) through a shaft core hole (12 a), and a rotating shaft (12 b) of the steering wheel shaft (12) is orderly connected with a shaft core hole (4 a) of the front wheel lower rocker arm assembly (4); the wheel assembly (13) is arranged on an output shaft (1 d) of the transmission side box (1); the device can lift the wheel assembly upwards by more than 500 millimeters within seconds to enable the wheel assembly to be separated from the water surface, so that the water resistance of the vehicle during water surface running can be obviously reduced.

The patent number is ZL201710182284.4, named as 'amphibious vehicle' and discloses the technical scheme as follows: the method comprises the following steps: a hull having a planing surface (2); and at least one retractable suspension device (4) movable from a vehicle supporting position to a retracted position, the at least one retractable suspension device comprising, for each wheel (5), an upper and a lower suspension arm (8,9), the upper and lower suspension arms (8,9) being pivotably connected at an inboard end to a supporting structure within the hull and at an outboard end to a suspension upright (7). The upright (7) extends from the first upper junction through the second lower junction to a location (10) for mounting a wheel hub. When deployed for use on land, the suspension upright extends outside the hull across a side (2A) of the planing surface; whereas the lower suspension arm (9) remains above the planing surface (2) throughout use of the amphibian on land. This suspension arrangement leaves the hull free of cuts in its planing surface.

The patent number is ZL200480001909.3, and the invention patent is named as an amphibious vehicle, and the technical scheme is as follows: an amphibian (1, fig. 1), a wheel suspension apparatus (20) comprising upper and lower linkages (11, 12); a road suspension device (28); and a retraction device (35) for moving the wheel between an extended position for road use and a retracted position for marine use. The suspension (28) is operatively disengaged from the wheel and/or linkage allowing retraction and extension. The retraction device (35) may also be disengaged during road use. The disengagement structure may include a ball and track mechanism (34', fig. 3), interlocking splines (92a, 93a,96, fig. 4 and 4A), interlocking teeth (106, 108, fig. 5), or a pneumatic clutch (138, fig. 6). Fig. 8 shows the combination of splines (160 and 161) for the boom arm (32) and a pneumatic clutch (168) for the retraction arm (37). The suspension (28) may be connected to the upper linkage (11) (fig. 2). Coils, torsion bars or hydropneumatic springs may be used. .

The patent number ZL2005800362548 is an invention patent named as an amphibious vehicle, and the technical scheme is as follows: an amphibious vehicle platform (30) has at least two road wheels (8) driven by a primary axle (60) and an intermediate axle (62). The wheels (8) may be retracted for skidding as shown, or extended for land use. A cage device (40), which may be a tube, surrounds the intermediate shaft (62). The cage assembly minimizes the cavity in the running surface (20) and reduces hydrodynamic drag. The width of the housing cavity or groove (32) in the longitudinal direction may be less than the radius of the wheel (8). The upper suspension member (56) connected to the lower member (40) via the strut member (52) may be an a-arm or macpherson strut. The wheel suspension assembly (68) and suspension retractor (74) may be remotely mounted within the interior watertight space of the vehicle. The seats (22, 24) and the prime mover (4) of the vehicle may be aligned along or parallel to a longitudinal axis of the vehicle.

In addition, the patent application number is 201911348918.4, the name is the invention patent of an amphibious vehicle synchronous retractable wheel device, and the disclosed technical scheme is as follows: the wheel retracting device comprises a synchronous rotating shaft, a rocker arm, a lock pin, two synchronous connecting rods, two four-bar mechanisms and an oil cylinder. The center of the rocker arm is connected with the synchronous rotating shaft. The latch pin can lock the rocker arm at a designated position. Two synchronous connecting rods are symmetrically arranged, and one end of each synchronous connecting rod is hinged with the corresponding end of the rocker arm. The two four-bar linkages are symmetrically arranged, the upper end of the inner side of each four-bar linkage is hinged at the other end of the corresponding synchronous connecting rod, and each four-bar linkage is fixedly connected with the corresponding chain transmission case. The oil cylinder is connected to the inner sides of the two four-bar linkage mechanisms. The four-bar mechanism is driven by the oil cylinder to fold and unfold one wheel, and the four-bar mechanism drives the transmission structure consisting of the synchronous connecting bar, the rocker arm and the synchronous rotating shaft to drive the other four-bar mechanism to fold and unfold the other wheel at the same time. The folding type road wheel has the characteristics of compact structure, large folding amplitude of the wheels, stable land operation and long service life. .

Patent application No. 201680039306.5 entitled "retractable wheel assembly for an amphibian" discloses the technical solution: comprises an actuator; a retraction linkage assembly movable between an extended position and a retracted position; a suspension assembly at least partially coupled to the retraction linkage assembly and movable between an extended position and a retracted position; and at least one wheel and/or track drive. The retraction linkage assembly and/or the suspension assembly supports and/or maintains the at least one wheel and/or track drive in a ground engaging position for use on land when the retraction linkage assembly and the suspension assembly are protracted.

The patent application number is 202011543570.7, the name is 'an amphibious vehicle overturning suspension structure and an amphibious vehicle', and the disclosed technical scheme is as follows: the suspension structure comprises a frame (8) and wheels (1); the suspension is arranged between the vehicle frame (8) and the vehicle wheel (1), the suspension comprises an upper cross arm (3), a lower cross arm (2), a rotating shaft (4), a rocker arm (5) and an oil-gas spring (7), one end of the oil-gas spring (7) is connected with the rocker arm (5), and the other end of the oil-gas spring is installed on the vehicle frame (8); and an angular displacement feedback mechanism. The invention adopts the hydro-pneumatic spring integrating the functions of the elastic element of the suspension, the damper and the overturning suspension driving power source, and the hydro-pneumatic spring is transversely arranged on the left and right sides of the vehicle, thereby not only meeting the damping and buffering functions of the amphibious vehicle running on the land, but also realizing the lifting of the wheel position when the wheel sails on water, and feeding back the lifting position of the wheel by adopting the angular displacement sensor, thereby ensuring the stability of the lifting height of the wheel.

The patent application number is 202011563385.4, the name is 'an amphibious vehicle and retractable suspension thereof' invention patent, and the disclosed technical scheme is as follows: the retractable suspension is arranged corresponding to one wheel and comprises a connecting shaft, a rotating arm, an upper connecting arm, a lower connecting arm, a steering rod and an adjusting assembly. The connecting shaft extends along the length direction of the frame and is connected with the frame; the inner end of the rotating arm is rotatably connected with the connecting shaft, so that the rotating arm rotates around the connecting shaft; the inner end of the upper connecting arm is hinged with the outer end of the rotating arm, and the outer end of the upper connecting arm is hinged with the first connecting point of the wheel; the inner end of the lower connecting arm is rotatably connected with the frame, and the outer end of the lower connecting arm is hinged with a second connecting point of the wheel; the second connecting point and the first connecting point are arranged at intervals; the outer end of the steering rod is hinged with a third connecting point of the wheel, and the inner end of the steering rod is rotatably connected with the frame; the third connecting point, the second connecting point and the first connecting point are arranged at intervals; and two ends of the adjusting component are respectively hinged with the outer end of the rotating arm and the middle area of the lower connecting arm.

Through careful analysis and comparative study, the issued patents and the applied patents refer to the wheel lifting device of the amphibious vehicle, but do not refer to the technical scheme that the wheel assemblies are completely collected inside the hull; and after the wheel assemblies are folded and lifted by deflection, although the wheel assemblies leave the water surface, all the wheel assemblies are still positioned outside the ship body, so that the wheel assemblies are not suitable for being assembled with amphibious rescue boats provided with self-righting devices.

Disclosure of Invention

The invention aims to provide a wheel lifting device which has scientific design, compact structure, reliable performance, sensitive action and low cost and can better meet the requirements of self-righting and resistance and speed increasing of an amphibious rescue boat; the device is formed by organically combining a hydraulic element and a mechanical part, and can lift a wheel assembly upwards by more than 300 millimeters within seconds, quickly separate the wheel assembly from the water surface and then store the wheel assembly in a ship body; the wheel lifting device can not only obviously reduce the water resistance of the rescue boat when the amphibious rescue boat runs on the water surface at a high speed, but also can rapidly realize the self-righting function after the amphibious rescue boat overturns without influencing the whole function.

The invention adopts the following technical scheme to achieve the purpose of the invention.

A wheel lifting device adaptive to an amphibious rescue boat comprises a hub assembly 1, a steering connector 2, a joint sleeve 3, a swing arm A4, a swing arm seat A5, a connecting sleeve 6, a swing arm B7, a connecting plate 8, a swing arm seat B9, a shock absorber assembly 10, a shock absorber rotating arm 11, a hydraulic cylinder 12, a hydraulic cylinder rotating arm 13, a swing arm seat 14, a hydraulic cylinder seat 15, a frame assembly 16, a hull shell 17, a guide plate A18, a guide plate B19 and a pull wire 20.

Wherein, wheel hub assembly 1 is in order adorn in the wheel assembly admittedly.

Steering shaft 2a and steering arm 2b are orderly arranged on steering connector 2, and steering connector 2 is fixedly mounted on hub assembly 1 through bolts.

The joint sleeve 3 is provided with two symmetrical steering shaft holes 3a which are respectively and orderly sleeved on the steering shaft(s) 2a of the steering connector 2, and one end face of the joint sleeve 3 is fixedly arranged at one end of the swing arm A4 through a bolt.

The middle part of the swing arm A4 is provided with a mandrel 4a, and the other end of the swing arm A4 is orderly sleeved on the swing arm seat A5.

The swing arm seat A5 is orderly and fixedly arranged on the preset positions at two sides (front part) of the frame assembly through bolts.

One end face of the connecting sleeve 6 is orderly and fixedly arranged on the hub assembly 1 through a bolt, and a sleeve of the connecting sleeve 6 is orderly provided with (a plurality of) installation screw holes 6a.

A connecting sleeve 7a at one end of the swing arm B7 is sequentially and fixedly arranged on a sleeve of the connecting sleeve 6 through a bolt, the other end of the swing arm B7 is sequentially and fixedly arranged at one end of a connecting plate 8 through a bolt, and a mandrel 7B is arranged in the middle of the swing arm B7.

The other end of the connecting plate 8 is orderly and fixedly arranged on a mandrel of the swing arm seat B9 through a bolt.

The swing arm seat B9 is internally provided with a mandrel and a lubricating sleeve, and the swing arm seat B9 is fixedly arranged on the preset positions of two sides (rear part) of the frame assembly 16 in order through bolts.

The lower ends of the (two) shock absorber assemblies 10 are respectively sleeved on the mandrel 4a and the mandrel 7b, and the upper ends thereof are respectively sleeved on shaft holes at the outer ends of the (two) shock absorber rotating arms 11 through the mandrels.

The front end of the hydraulic cylinder 12 is orderly sleeved in a mandrel hole at the outer end of the rotating arm 13 of the hydraulic cylinder through a mandrel.

The inner end of the damper rotating arm 11 and the inner end of the hydraulic cylinder rotating arm 13 are both provided with spline tooth holes.

The swivel arm base 14 is provided with a spline shaft 14a, and a spline tooth hole at the inner end of the swivel arm 11 of the shock absorber and a spline tooth hole at the inner end of the swivel arm 13 of the hydraulic cylinder are respectively and sequentially fixedly arranged at two ends of the spline shaft 14a, and the swivel arm base(s) 14 are sequentially and fixedly arranged at preset positions at two sides (upper parts) of the frame assembly 16 through bolts.

The rear ends of the hydraulic cylinder(s) 12 are orderly sleeved on the hydraulic cylinder seat(s) 15 through a mandrel, and the hydraulic cylinder seat(s) 15 are orderly and fixedly arranged on the preset positions at the two sides (upper parts) of the frame assembly through bolts.

The frame assembly 16 is sequentially and fixedly arranged at a preset position in the hull shell 17 through a connecting plate(s) and bolts.

The bottom of the hull shell 17 is provided with wheel holes corresponding to the wheels, the wheel holes are provided with (pre-embedded) supporting frames 17a, one side of each hinge 17B is fixedly arranged on two sides of the supporting frame 17a through bolts in order, the other side of the hinge 17B is fixedly connected with a guide plate A18 and a guide plate B19 in order, and the two sides of the hull shell 17 corresponding to the wheel assembly(s) are provided with assembling holes 17c and are provided with corresponding assembling hole cover plates.

One end of the stay wire(s) 20 is orderly connected with the guide plate A18 and the guide plate B19 respectively, and the other end is orderly connected with the swing arm A4 and the swing arm B7 respectively.

The invention comprises a front wheel lifting device and a rear wheel lifting device; the main components for realizing the lifting of the front wheel comprise a hub assembly 1, a steering connector 2, a joint sleeve 3, a swing arm A4, a swing arm seat A5, a shock absorber assembly 10, a shock absorber rotating arm 11, a hydraulic cylinder 12, a hydraulic cylinder rotating arm 13, a swing arm seat 14, a hydraulic cylinder seat 15 and the like; the main components for realizing 'rear wheel lifting' comprise a hub assembly 1, a connecting sleeve 6, a swing arm B7, a connecting plate 8, a swing arm seat B9, a shock absorber assembly 10, a shock absorber rotating arm 11, a hydraulic cylinder 12, a hydraulic cylinder rotating arm 13, a rotating arm seat 14, a hydraulic cylinder seat 15 and the like.

The working principle of the "front wheel lifting device" and the process of achieving wheel lifting are as follows.

When the amphibious rescue boat runs on the land, the hydraulic cylinder 12 is in a complete contraction and self-locking state, and the land steering can be easily realized by pushing and pulling the steering arm 2b through the steering tie rod; the upper end of the shock absorber assembly 10 can be relatively fixed on a preset position through the hydraulic cylinder rotating arm 13 and the shock absorber rotating arm 11 thereof; the swing arm A4 supports the wheel assembly to extend 300 mm (more) out of the bottom surface of the hull shell 17 and is completely contacted with the ground; at this time, the stay wire(s) 20 is/are in a relaxed state, and the deflector(s) a18 and the deflector(s) B19 naturally hang down and open by their own weights.

When the rescue boat runs on the water surface, (through manual operation) the hydraulic cylinder 12 extends out, the hydraulic cylinder rotating arm 13 is pushed to use the rotating arm seat 14 as the center and drive the shock absorber rotating arm 11 to synchronously rotate, the shock absorber assembly 10 is lifted upwards along with the hydraulic cylinder rotating arm, and the swing arm A4 connected with the shock absorber assembly and the hub assembly 1 (using the swing arm seat A5 as the center) are driven to be lifted upwards until the wheel assembly completely enters the hull shell 17 (at the moment, the hydraulic cylinder 12 enters a self-locking state); simultaneously, with the upward lifting of the swing arm A4, pulling the (two) pull wires 20 connected with the swing arm A to turn the guide plate A18 and the guide plate B19 by taking the hinge 17B as the center until the wheel hole is completely closed and the wheel hole and the bottom surface of the hull shell 17 form a complete sliding surface; when the amphibious rescue boat runs on the water surface at a high speed, the guide plate A18 and the guide plate B19 can better resist and bear the water flow impact generated on the bottom surface of the hull shell 17 through the supporting frame 17 a.

The working principle of the rear wheel lifting device and the process of realizing the lifting of the wheels are basically the same as those of the front wheels.

Due to the adoption of the technical scheme, the invention perfectly achieves the aim of the invention and has the following outstanding advantages (namely beneficial effects) compared with similar products.

1. The amphibious rescue boat has the advantages of scientific and reasonable design, simple and compact structure, sensitive action and reliable performance, and can better meet the urgent needs of self-righting and resistance and speed increasing of the amphibious rescue boat.

2. All the wheels can be rapidly collected in the hull, so that the running resistance on the water surface is remarkably reduced, and the reliability that the rescue boat can be rapidly reset to be aligned after overturning is greatly improved.

3. The universality and standardization degree of the components are high, the manufacturing cost is low, the operation of lifting the wheel is simple and convenient, all the components are convenient to disassemble, and the maintenance is easy.

Drawings

The invention is further described below with reference to the given figures.

Fig. 1 is a side view of a lifting device of a wheel of an amphibious rescue boat in a water surface running state.

Fig. 2 is a front view of a lifting device of a wheel of the amphibious rescue boat in a water surface running state.

Fig. 3 is a side view of the lifting device of the vehicle wheel of the amphibious rescue boat in a land running state.

Fig. 4 is a front view of a wheel lifting device of an amphibious rescue boat in a land running state.

Fig. 5 is a schematic view of the overall structure of the front wheel lifting device of the present invention.

Fig. 6 is a schematic view of the overall structure of the axle rear wheel lifting device of the present invention.

Detailed Description

As can be seen from fig. 1, 2, 3, 4, 5 and 6, the present invention includes a hub assembly 1, a steering connector 2, a joint sleeve 3, a swing arm A4, a swing arm seat A5, a joint sleeve 6, a swing arm B7, a connecting plate 8, a swing arm seat B9, a shock absorber assembly 10, a shock absorber boom 11, a hydraulic cylinder 12, a hydraulic cylinder boom 13, a swing arm seat 14, a hydraulic cylinder seat 15, a frame assembly 16, a hull shell 17, a deflector a18, a deflector B19 and a pull wire 20.

As is further evident from fig. 1, 5 and 6, the present invention comprises a "front wheel lift" and a "rear wheel lift"; the front wheel lifting device comprises a hub assembly 1, a steering connector 2, a joint sleeve 3, a swing arm A4, a swing arm seat A5, a shock absorber assembly 10, a shock absorber rotating arm 11, a hydraulic cylinder 12, a hydraulic cylinder rotating arm 13, a swing arm seat 14, a hydraulic cylinder seat 15 and the like; the rear wheel lifting device comprises a hub assembly 1, a connecting sleeve 6, a swing arm B7, a connecting plate 8, a swing arm seat B9, a shock absorber assembly 10, a shock absorber rotating arm 11, a hydraulic cylinder 12, a hydraulic cylinder rotating arm 13, a swing arm seat 14, a hydraulic cylinder seat 15 and the like; most parts of the front wheel lifting device and the rear wheel lifting device are standard parts and can be interchanged and used universally.

As also shown in fig. 1, 5 and 6, in order to facilitate steering of the amphibious rescue boat during driving on land, a steering shaft 2a and a steering arm 2b are arranged on a steering connector 2 in a front wheel lifting device, and the steering connector 2 is fixedly arranged on a hub assembly 1 through a bolt; meanwhile, the joint sleeve 3 is symmetrically provided with (two) steering shaft holes 3a and is respectively and orderly sleeved on (two) steering shafts 2a of the steering connector 2, so that the steering angle of the front wheel can be ensured to be larger than 32 degrees, and the turning radius of the amphibious rescue boat can be minimized when the amphibious rescue boat runs on the land.

As shown in fig. 2 and 4, in order to reduce the water resistance caused by the wheel hole(s) at the bottom of the hull 17, a support frame 17a is (pre-embedded) respectively installed on the wheel hole(s) formed at the bottom of the hull 17, and a hinge 17B, a guide plate a18 and a guide plate B19 are respectively installed on two sides of the support frame(s) 17 a; and the guide plate A18 and the guide plate B19 are respectively provided with a pull wire 20 controlled by a swing arm A4 and a swing arm B7, when the wheel assembly is lifted upwards, the guide plate A18 and the guide plate B19 are overturned upwards along with the wheel assembly until the wheel hole is completely closed.

As further shown in fig. 2 and 4, in order to facilitate assembly, disassembly, and maintenance, mounting holes 17c are formed at positions corresponding to the wheel assembly(s) on both sides of the hull shell 17, and corresponding mounting hole covers are provided.

As shown in fig. 1, 2, 3 and 4, in order to ensure the reliability, stability and accuracy of the "wheel lifting device", the swing arm base(s) A5, the swing arm base B9, the swing arm base 14 and the hydraulic cylinder base 15 are respectively and sequentially fixed at preset positions on both sides of the frame assembly 16 by bolts.

Claims (3)

1. A wheel lifting device adaptive to an amphibious rescue boat comprises a hub assembly (1), a steering connector (2), a joint sleeve (3), a swing arm A (4), a swing arm seat A (5), a connecting sleeve (6), a swing arm B (7), a connecting plate (8), a swing arm seat B (9), a shock absorber assembly (10), a shock absorber rotating arm (11), a hydraulic cylinder (12), a hydraulic cylinder rotating arm (13), a rotating arm seat (14), a hydraulic cylinder seat (15), a frame assembly (16), a hull shell (17), a guide plate A (18), a guide plate B (19) and a pull wire (20); the wheel hub assembly is characterized in that the wheel hub assembly (1) is sequentially and fixedly arranged in the wheel assembly; the steering connector (2) is orderly provided with a steering shaft (2 a) and a steering arm (2 b), and the steering connector (2) is fixedly arranged on the hub assembly (1) through a bolt; the joint sleeve (3) is provided with two symmetrical steering shaft holes (3 a) and is respectively and orderly sleeved on the steering shaft (2 a) of the steering connector (2), and one end face of the joint sleeve (3) is fixedly arranged at one end of the swing arm A (4) through a bolt; the middle part of the swing arm A (4) is provided with a mandrel (4 a), and the other end of the swing arm A is orderly sleeved on the swing arm seat A (5); the swing arm seat A (5) is sequentially and fixedly arranged at preset positions on two sides of the frame assembly (16) through bolts; one end face of the connecting sleeve (6) is fixedly arranged on the hub assembly (1) in order through a bolt, and a sleeve of the connecting sleeve (6) is provided with an installation screw hole (6 a) in order; a connecting sleeve (7 a) at one end of the swing arm B (7) is fixedly arranged on the sleeve of the connecting sleeve (6) in order through a bolt, the other end of the connecting sleeve is fixedly arranged at one end of the connecting plate (8) in order through a bolt, and a mandrel (7B) is arranged in the middle of the swing arm B (7); the other end of the connecting plate (8) is fixedly arranged on a mandrel of the swing arm seat B (9) in order through a bolt; a mandrel and a lubricating sleeve are arranged in the swing arm seat B (9) and are sequentially and fixedly arranged at preset positions on two sides of the frame assembly (16) through bolts; the lower ends of the two shock absorber assemblies (10) are respectively sleeved on the mandrel (4 a) and the mandrel (7 b), and the upper ends of the two shock absorber assemblies are respectively sleeved on shaft holes at the outer ends of the rotating arms (11) of the two shock absorbers through the mandrels; the front end of the hydraulic cylinder (12) is orderly sleeved in a mandrel hole at the outer end of the hydraulic cylinder rotating arm (13) through a mandrel; the inner end of the shock absorber rotating arm (11) and the inner end of the hydraulic cylinder rotating arm (13) are both provided with spline tooth holes; a spline shaft (14 a) is arranged on the rotating arm seat (14), the inner end of the rotating arm (11) of the shock absorber and the inner end of the rotating arm (13) of the hydraulic cylinder are fixedly arranged at two ends of the spline shaft (14 a) in order respectively, and the rotating arm seats (14) are fixedly arranged at preset positions at two sides of the frame assembly (16) in order through bolts; the rear end of each hydraulic cylinder (12) is orderly sleeved on each hydraulic cylinder seat (15) through a mandrel, and each hydraulic cylinder seat (15) is orderly and fixedly arranged on the preset positions at two sides of the frame assembly through bolts; the frame assembly (16) is sequentially and fixedly arranged at a preset position in the hull shell (17) through a plurality of connecting plates and bolts; wheel holes are respectively formed in the positions, corresponding to the wheels, of the bottom of the hull shell (17), supporting frames (17 a) are arranged on the wheel holes, one side of each hinge (17B) is fixedly and orderly arranged on two sides of each supporting frame (17 a) through bolts, the other side of each hinge (17B) is fixedly and orderly connected with the guide plate A (18) and the guide plate B (19), assembling holes (17 c) are formed in the positions, corresponding to the wheel assemblies, of the two sides of the hull shell (17), and corresponding assembling hole cover plates are assembled; one end of each of the two stay wires (20) is orderly connected with the guide plate A (18) and the guide plate B (19) respectively, and the other end of each stay wire is orderly connected with the swing arm A (4) and the swing arm B (7) respectively.

2. The wheel lifting device adaptive to an amphibious rescue boat as claimed in claim 1, wherein the main components for realizing front wheel lifting comprise a hub assembly (1), a steering connector (2), a joint sleeve (3), a swing arm A (4), a swing arm seat A (5), a shock absorber assembly (10), a shock absorber rotating arm (11), a hydraulic cylinder (12), a hydraulic cylinder rotating arm (13), a rotating arm seat (14) and a hydraulic cylinder seat (15); the working principle and the process of realizing the lifting of the wheels are as follows: when the amphibious rescue boat runs on the land, the hydraulic cylinder (12) is in a complete contraction and self-locking state, and the land steering can be easily realized by pushing and pulling the steering arm (2 b) through the steering tie rod; the upper end of the shock absorber assembly (10) can be relatively fixed on a preset position through the hydraulic cylinder rotating arm (13) and the shock absorber rotating arm (11) thereof; the swing arm A (4) supports the wheel assembly to extend out of the bottom surface of the hull shell (17) by more than 300 mm and is completely contacted with the ground; at the moment, each guy wire (20) is in a relaxed state, and each guide plate A (18) and each guide plate B (19) naturally droop and open by virtue of self weight; when the rescue boat runs on the water surface, the hydraulic cylinder (12) is manually controlled to extend out, the hydraulic cylinder rotating arm (13) is pushed to rotate synchronously with the rotating arm seat (14), the shock absorber rotating arm (11) is driven to rotate synchronously, the shock absorber assembly (10) is lifted upwards, the swing arm A (4) connected with the shock absorber assembly and the hub assembly (1) of the shock absorber assembly are driven to lift upwards with the swing arm seat A (5) as the center until the wheel assembly completely enters the hull shell (17), and at the moment, the hydraulic cylinder (12) enters a self-locking state; simultaneously, with the upward lifting of the swing arm A (4), two pull wires (20) connected with the swing arm A are pulled to turn over the guide plate A (18) and the guide plate B (19) by taking the hinge (17B) as the center until the wheel hole is completely closed, and the wheel hole and the bottom surface of the hull shell (17) form a complete sliding surface; when the amphibious rescue boat runs on the water surface at a high speed, the guide plate A (18) and the guide plate B (19) can better resist and bear water flow impact generated on the bottom surface of the hull shell (17) through the supporting frame (17 a).

3. The wheel lifting device adaptive to an amphibious rescue boat as claimed in claim 1, wherein the main components for realizing 'rear wheel lifting' comprise a hub assembly (1), a connecting sleeve (6), a swing arm B (7), a connecting plate (8), a swing arm seat B (9), a shock absorber assembly (10), a shock absorber rotating arm (11), a hydraulic cylinder (12), a hydraulic cylinder rotating arm (13), a rotating arm seat (14) and a hydraulic cylinder seat (15); the working principle of the rear wheel lifting device and the process of realizing the lifting of the wheels are basically the same as those of the front wheels.

Images