CN201729628U

CN201729628U - Support mechanism of expander

Info

Publication number: CN201729628U
Application number: CN2010202754532U
Authority: CN
Inventors: 林昌华; 李亚辉; 杨勋卓
Original assignee: Chongqing University of Technology
Current assignee: Chongqing University of Technology
Priority date: 2010-07-29
Filing date: 2010-07-29
Publication date: 2011-02-02
Anticipated expiration: 2020-07-29

Abstract

The utility model provides a support mechanism of an expander. The support mechanism comprises a piston; a bearing cover is fixed at the upper end of the piston; a cavity is formed between the bearing cover and the piston; an upper positioning ring and a lower positioning ring are arranged in the cavity; a thrust bearing is fixed between the upper positioning ring and the lower positioning ring; the upper positioning ring is closely propped against the bearing cover, and the lower positioning ring is closely propped against the piston; a piston rod extends into the cavity, and the lower end of the piston rod is closely propped against the upper surface of the thrust bearing; a rotating shaft is fixed at the bottom of the piston rod; a positioning block is sleeved on the rotating shaft; a stop block is further fixed at the lower end of the rotating shaft; the positioning block is clamped between the thrust bearing and the stop block; a synchronous belt wheel is fixed at the upper end of the piston rod; a motor is fixed on a cylinder body; a rotating wheel is mounted on a rotating shaft of the motor; the rotating wheel drives the synchronous belt wheel by a belt and further transmits the piston rod; the piston rod adopts a cylinder with an upper open end; a screw rod inserted into the piston rod is connected with the piston rod through screw threads; and the upper end of the screw rod is connected with a support block. The support mechanism has the advantages of large stroke, small volume and light weight.

Description

A kind of supporting mechanism of expander

Technical field

The utility model relates to and is used to the expander that helps the occupant to save oneself after automobile gets into an accident, and is specially the supporting mechanism that uses in a kind of expander.

Background technology

Automobile is one of topmost vehicle; cause traffic accident because joy riding, the road of chaufeur is wet and slippery and the pedestrian does not observe traffic rules and regulations etc. through regular meeting in the process of moving; and seat or vehicle frame that great traffic accident makes the occupant be deformed are possibly pushed down; if the occupant can not escape at short notice in this case; the opportunity that not only can incur loss through delay treatment; even it is injured also can secondary to take place, and therefore, needs a kind of self-help apparatus of automobile when having an accident of tackling.

At present, the existing certain defective of self-help apparatus ubiquity that is used for car accedent, as a kind of air sac jack commonly used, it comprises air bag and propulsion source, is high pressure gas and by the gas feeder air feed of special use in the propulsion source, during use air bag is arranged on the vehicle frame or seat one side of distortion, make air bag expansion by propulsion source input high pressure gas, thereby the vehicle frame or the seat of automobile deformed position are backed down, make no longer pressurized of the foot of human body and health, and from car body, spin off.But, because it is very little that people's shank or health are pressed its gap, back, after the car body of distortion must being backed down enough big space the people is saved, and the stroke of this air sac jack is very little, its inflation back air-sprung height can't support enough big escape space, and its subsidiary gas feeder is too heavy, after the occupant is stuck, can't normally use these equipment, so it can not satisfy the requirement of saving oneself at all.And for example another kind of automobile self-rescue air bag, it is to be provided with air bag under car chassis, and the outlet of the admission port of air bag and the tail gas of automobile links to each other, and its principle is that to utilize the tail gas of automobile discharge that air bag is filled full, and then air bag supports automobile.But after great traffic accident took place, automobile is normal start the engine probably, and air bag just can't obtain the support of failure-free propulsion source like this, also can't realize expanding the purpose of vehicle frame, so can not reach the requirement of rescue.Also have some equipment that are used to rescue in addition, as large-scale hoisting air chamber, this air bag is to utilize the bearing surface of overlarge area to realize the lifting function, but its volume is too big, weight is very heavy again, can only be used for the large-scale steamer of lifting, building etc., and be not suitable for automotive use; Also has a kind of wrecking equipment, for solving the problem of propulsion source, it is provided with high-pressure gas bottle on automobile, by high-pressure gas bottle is airbag aeration, but safety and air-tightness after the long-time placement of this high-pressure gas bottle all can not be protected, and therefore cause accident that the effect that back equipment is difficult to reach expectation takes place, and air bag can't be fixed on the certain location in use, less stable is so this equipment can not satisfy the requirement of saving oneself after car accedent takes place.

The utility model content

At above-mentioned deficiency of the prior art, the purpose of this utility model is to solve the too little problem that can not expand enough big escape space that makes of the supporting mechanism stroke of the self-help apparatus that is used for automobile at present, and provide a kind of stroke greatly, all less expander supporting mechanism of volume and weight.

The technical solution of the utility model: a kind of supporting mechanism of expander is characterized in that comprise piston, described piston slidably is arranged in the cylinder body; Be fixed with a bearing cap shim that raises up in the upper end of piston, between bearing cap shim and piston, form cavity, in described cavity, be provided with steady ring and a following steady ring on one, between last steady ring and following steady ring, be fixed with a thrust baring, described upward steady ring and bearing cap shim push against, and described steady ring down and piston push against; Piston rod stretches in the cavity after passing steady ring from the top of bearing cap shim, the lower end of piston rod and the upper surface of thrust baring push against, also be fixed with a rotating shaft in the bottom of piston rod, in rotating shaft, be with a locating piece, also be fixed with a block in the lower end of rotating shaft, described locating piece is stuck between the lower surface and block of thrust baring; The upper end of described piston rod is fixed with a synchronous pulley, runner is installed being fixed with on the cylinder body in a motor and the rotating shaft at motor, and described runner drives synchronous pulley and then drive piston rod rotation by belt; Described piston rod is the cylindrical structure of upper end open, and screw rod inserts in the piston rod and with piston rod thread and is connected, and the upper end of screw rod links to each other with back-up block.

Further, be provided with ball-bearing casing on the top of cylinder body, described synchronous pulley also is fixed with a belt wheel cover by ball-bearing casing and cylinder body normal-running fit on the top of cylinder body, and described synchronous pulley is arranged in the belt wheel cover.Can protect synchronous pulley by the belt wheel cover; prevent that synchronous pulley from being blocked by exterior object or wear and tear when rotating; in addition; ball-bearing casing not only can be played a supporting role to synchronous pulley; can also prevent synchronous pulley when rotating to the both sides run-off the straight, make synchronous pulley remain the spigot shaft coaxle with piston rod.

Further, thrust baring and last steady ring and and following steady ring between be respectively equipped with packing ring.Can reduce friction between thrust baring and the upper and lower steady ring by packing ring.

With respect to prior art, the utlity model has following beneficial effect:

1, the stroke of supporting mechanism is bigger: the utility model has adopted the supporting mechanism of telescoping, supporting mechanism in-to-in screw rod can rotate under the drive of motor and stretch out, so just prolonged the stroke of whole expander, make expander can support enough big escape space in narrow space, the help desk personnel flees from impaired car body.

2, volume is little, in light weight: the utility model has all carried out strict restriction with the size and the weight of supporting mechanism, simultaneously require supporting mechanism that enough big bearing capacity can be provided again, the outputting power that like this can the working power source and the stroke and the own wt of supporting mechanism are accomplished coupling in working order, accomplish to make things convenient for people's use of saving oneself under stranded situation.

3, simple, the easy installation and removal of manufacturing process, the cylinder body of supporting mechanism of the present utility model and parts all adopt 45 steel seamless steel tubes of national standard, it has the advantage of welding mechanics better performances, and cylinder body and cylinder bottom and each separating component adopt the mode of welding to be connected, thereby simplified manufacture craft; Cylinder cap and cylinder body adopt bolted connection, make demolition, installation all convenient like this, have also reduced the manufacturing cost of equipment.

Description of drawings

Fig. 1 is a kind of structure cutaway view that has adopted the expander of the utility model supporting mechanism.

Among the figure, 1-air pump, 2-storage battery, 3-cylinder body, 4-air bag, 5-back-up block, 6-piston, 7-bearing cap shim, 8-cavity, 9-piston rod, 91-upward steady rings, 92-following steady ring, 10-thrust baring, 11-rotating shaft, 12-locating piece, 13-block, 14-synchronous pulley, 15-motor, 16-runner, 17-screw rod, 18-spherical hinge, 19-ball-bearing casing, 20-packing ring, 21-belt wheel cover, 22-air valve, 23-gas piping.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and a kind of expander that has adopted the utility model supporting mechanism.

As shown in Figure 1, a kind of vehicle self-saving expander, comprise supporting mechanism that is used for the dilatating and deformable car body and the actuating unit that is used for providing expansion power to described supporting mechanism, described actuating unit is by air pump 1 and is used for constituting to the storage battery 2 of air pump 1 power supply, during installation actuating unit is placed in the middle of the front-row seats of automobile or below the back seat; The lower end of described supporting mechanism slidably is arranged in the cylinder body 3, between the bottom surface of the bottom surface of supporting mechanism and cylinder body 3, be provided with air bag 4, air pump 1 in the actuating unit gives air bag 4 inflations by gas piping 23, also is provided with air valve 22 on the gas piping 23 between air pump 1 and the air bag 4; Described supporting mechanism comprises the back-up block 5 that is used for the supporting deformation car body, the described back-up block 5 telescopic upper ends that are arranged at supporting mechanism.When gas transmission 23 pipes that connect between air pump 1 and the air bag 4, be on the exterior cylinder body 3 of supporting mechanism, to be provided with an air extractor vent, gas piping 23 passes this air extractor vent and links to each other with air bag, and described air extractor vent can be arranged on the bottom of cylinder body 3, also can be arranged on the sidewall of cylinder body 3.

Referring to Fig. 1, this expander has adopted supporting mechanism of the present utility model, comprises piston 6, and piston 6 slidably is arranged in the cylinder body 3; Be fixed with a bearing cap shim that raises up 7 in the upper end of piston 6, between bearing cap shim 7 and piston 6, form cavity 8, in described cavity 8, be provided with steady ring 91 and a following steady ring 92 on one, between last steady ring 91 and following steady ring 92, be fixed with a thrust baring 10, the described steady ring 91 of going up pushes against with bearing cap shim 7, and described steady ring 92 down pushes against with piston 6; Piston rod 9 stretches in the cavity 8 after passing steady ring 91 from the top of bearing cap shim 7, the upper surface of the lower end of piston rod 9 and thrust baring 10 pushes against, also be fixed with a rotating shaft 11 in the bottom of piston rod 9, in rotating shaft 11, be with a locating piece 12, also be fixed with a block 13 in the lower end of rotating shaft 11, described locating piece 12 is stuck between the lower surface and block 13 of thrust baring 10; The upper end of described piston rod 9 is fixed with a synchronous pulley 14, be fixed with a motor 15 on the cylinder body 3 and runner 16 is being installed in the rotating shaft of motor 15, described runner 16 drives synchronous pulley 14 and then drive piston rod 9 rotations by belt, runner 16 is concordant substantially with the height of synchronous pulley 14 when mounted, so just can make belt keep level and smooth, can also reduce the friction between belt and the wheel; Top at cylinder body 3 also is provided with ball-bearing casing 19, synchronous pulley 14 is by ball-bearing casing 19 and cylinder body 3 normal-running fiies, not only can play a supporting role by ball-bearing casing to synchronous pulley, can also prevent synchronous pulley when rotating to the both sides run-off the straight, make synchronous pulley remain the spigot shaft coaxle with piston rod.Described piston rod 9 is the cylindrical structure of upper end open, and screw rod 17 inserts in the piston rod 9 and with piston rod 9 and is threaded, and also is provided with spherical hinge 18 in the lower end of back-up block 5, and described screw rod 17 flexibly connects by spherical hinge 18 and back-up block 5.Also be fixed with a belt wheel cover 21 on the top of cylinder body 3, synchronous pulley 14 is arranged in the belt wheel cover 21, through hole is all left in upper end and side at belt wheel cover 21, screw rod 17 passes from the top through hole of belt wheel cover 21, and the belt on the motor runner 16 penetrates with synchronous pulley 14 from the through hole of belt wheel cover 21 sides and links to each other.

Referring to Fig. 1, in this expander, because piston rod 9 will drive thrust baring 10 rotations when rotating, and the last steady ring 91 and the following steady ring 92 of thrust baring 10 upper/lower terminals are all fixed, therefore for reducing to go up the friction between steady ring 91 and following steady ring 92 and the thrust baring 10, thrust baring 10 and last steady ring 91 and and following steady ring 92 between be respectively equipped with packing ring 20.Just thrust baring 10 and upper and lower steady ring can be kept apart by packing ring 20 like this, and packing ring 20 can adopt softer plastics of material or rubber etc., make thrust baring 10 inside can not be stuck when rotated.In this expander, last steady ring 91 and following steady ring 92 are bearing.

Referring to Fig. 1, in the supporting mechanism of this expander, the purpose that rotating shaft 11 is set in the lower end of piston rod 9 is, makes piston rod 9 11 rotations around the shaft, prevent that piston rod 9 is offset, and therefore is arranged at rotating shaft 11 on the central axis of piston rod 9 when rotating; The locating piece 12 that is enclosed within simultaneously in the rotating shaft 11 can not only play upwards spacing, can also play the spacing of left and right direction, when mounted, the left and right two ends that make locating piece 12 push against with the inwall both sides of following steady ring 92 respectively, so just can limit the position of rotating shaft 11, make it keep in the vertical direction and coaxial with the central axis of piston rod 9.

Referring to Fig. 1, the cylinder body 3 of this expander can be set to split-type structural, promptly is made of the cylinder cap at top and the cup shell of lower end, adopts bolted connection between cylinder cap and the cup shell, more convenient like this dismounting.For making the manufacturing simple possible and controlling cost, the material of cylinder body adopts 45 steel seamless steel tubes of national standard, cylinder base and each separated components all adopt welding manner to connect, because 45 steel are dead-soft steeies, therefore it has the good advantage of welding mechanics performance, and is simpler, laborsaving when making.

Because supporting mechanism has had the support of cylinder body, therefore air bag mainly seals in this expander, thereby the manufacturing requirement to air bag can reduce, at this, the double-decker that the overcoat that the air bag of this expander adopts liner that elastomeric material makes and nylon cloth to make is formed is provided with french talc between the liner of air bag and overcoat, can prevent from like this that air bag from bonding together to be broken through when work, and air bag compresses back thickness less than 25 mm, thereby can reduce cost of manufacture.

The principle of work of this expander:

During use, earlier supporting mechanism is taken out the position that is placed on car body or seat modification, because the size of this expander supporting mechanism less than 11 cm, therefore can be put it in the car body slit after the distortion easily.Then the back-up block of supporting mechanism upper end and the cylinder base of supporting mechanism lower end are pushed against with the car body deformation place respectively, open air pump switch and motor switch again, at this moment storage battery is powered to air pump and is made its work on the one hand, air pump is given airbag aeration by gas piping, air bag will expand gradually, thereby the lifting supporting mechanism makes its upward movement; On the other hand, motor drives synchronous pulley by runner and rotates, owing to synchronous pulley is captiveed joint with piston rod, so also rotation synchronously of piston rod, at this moment owing to is connected with screw flight at piston rod, thus understand between piston rod and the screw rod generation upper and lower to application force; Piston rod is subjected to downward power, but because the lower end of piston rod is held by thrust shaft and propped up, so piston rod can not move down and can only rotate in situ, and screw rod is subjected to application force upwards, so screw rod will protrude upward, and the back-up block that drives the upper end moves.Like this, back-up block backs down the car body expansion of deformation place under the combined action power that screw rod self moves up and airbag inflation drive supporting mechanism integral body moves up.This expander that combines above two kinds of expansion patterns in use, can apply bigger application force to the car body of deformation place, the stroke of back-up block also significantly increases simultaneously, basically can reach the double distance of original stroke, can when saving oneself, provide bigger escape space for indicator of trapped personnel.

When regaining back-up block, only need close air pump switch and make the motor counter-rotating, at this moment air bag is automatic deflation, thereby supporting mechanism is descended; Simultaneously the runner of motor drives the synchronous pulley contrarotation, and piston rod is contrarotation also, and screw rod is subjected to downward power and will withdraw in the piston rod, so just makes expander be returned to the preceding state of use.The motor of this expander can drive with storage battery, also can drive by vehicular power-bottle, and the switch of motor can be arranged on the back-up block, convenient like this starting switch in case of emergency.

Claims

1. the supporting mechanism of an expander is characterized in that, comprises piston (6), and described piston (6) slidably is arranged in the cylinder body (3); Be fixed with a bearing cap shim that raises up (7) in the upper end of piston (6), between bearing cap shim (7) and piston (6), form cavity (8), in described cavity (8), be provided with one and go up a steady ring (91) and a following steady ring (92), between last steady ring (91) and following steady ring (92), be fixed with a thrust baring (10), the described steady ring (91) of going up pushes against with bearing cap shim (7), and described steady ring (92) down pushes against with piston (6); Piston rod (9) stretches in the cavity (8) after passing steady ring (91) from the top of bearing cap shim (7), the upper surface of the lower end of piston rod (9) and thrust baring (10) pushes against, also be fixed with a rotating shaft (11) in the bottom of piston rod (9), in rotating shaft (11), be with a locating piece (12), also be fixed with a block (13) in the lower end of rotating shaft (11), described locating piece (12) is stuck between the lower surface and block (13) of thrust baring (10); The upper end of described piston rod (9) is fixed with a synchronous pulley (14), being fixed with one on cylinder body (3) is provided the motor (15) of power and runner (16) is installed in the rotating shaft of motor (15) by storage battery, described runner (16) drives synchronous pulley (14) and then drive piston rod (9) rotation by belt; Described piston rod (9) is the cylindrical structure of upper end open, and screw rod (17) inserts in the piston rod (9) and with piston rod (9) and is threaded, and the upper end of screw rod (17) links to each other with back-up block (5).

2. vehicle self-saving expander according to claim 1 is characterized in that, is provided with ball-bearing casing (19) on the top of cylinder body (3), and described synchronous pulley (14) is by ball-bearing casing (19) and cylinder body (3) normal-running fit.

3. vehicle self-saving expander according to claim 1 is characterized in that, thrust baring (10) and last steady ring (91) and and following steady ring (92) between be respectively equipped with packing ring (20).

4. vehicle self-saving expander according to claim 2 is characterized in that, also is fixed with a belt wheel cover (21) on the top of cylinder body (3), and described synchronous pulley (14) is arranged in the belt wheel cover (21).