CN1163207A

CN1163207A - Improved pneumatically telescoping mast

Info

Publication number: CN1163207A
Application number: CN 97102242
Authority: CN
Inventors: 约汉·A·修斯; 约汉·C·斯蒂恩
Original assignee: Will Burt Co
Current assignee: Will Burt Co
Priority date: 1996-01-16
Filing date: 1997-01-15
Publication date: 1997-10-29

Abstract

An improved pneumatically telescoping mast supported for pivotal movement in opposite directions is provided. The mast includes adjacent telescoping sections slidable relative to one another between retracted and extended positions. A pneumatic control system for displacing the mast sections between retracted and extended positions is also provided as is a system for pivoting the mast in opposite directions about the pivot axis between the horizontal and vertical positions. The mast includes a light source mounted at the other upper end of the mast which is capable of running on the same DC power source as the pneumatic control system and the mast pivoting system.

Description

Improved pneumatic extension mast

The present invention relates to a kind of improvement of pneumatic extension mast, this mast uses single direct supply as light source and other required power supply of mast.

4,413,451 be included in the inside as a reference herein, therefore pneumatic extension mast well known in the art need not describe in detail at this.

A kind of pneumatic extension mast of knowing in prior art generally is such, and it can be installed on the roof of power actuated vehicle such as emergency vehicles or breakdown lorry at an easy rate.In such layout, mast generally is to be used as the location electric apparatus, particularly is used for the lamps and lanterns on vehicle overhead point place.Its effect is to illuminate bulk zone rapidly above vehicle.This can carry out expeditious measures under illumination, as in the scene of the accident, perhaps allow engineering recover the staff as working after storm.Pneumatic extension mast has special advantage under these circumstances, because they are in light weight, it is little to shrink the back size, and can be installed in most of emergency vehicles and comprise above the roof of automobile.

The pneumatic extension mast of prior art utilizes air to extend under pressure, and normally vertical when complete elongation state.The representative type pneumatic extension mast comprises a compressor or other air control unit, and they move the extension mast section between elongation and punctured position.In addition, pneumatic extension mast can comprise a mechanical device, is used to make mast to pivot between horizontal and vertical position.Such layout is published in the S.N.286 that transfers cessionary of the present invention, and in 269 patent applications, this application is still in examination.This layout is separated with pneumatic control mechanism.

In many applications, pneumatic control mechanism is used as power by an air compressor, link to each other with a direct supply, and the mechanism that is used for the pivoted mast is by a DC MOTOR CONTROL platform base that this motor rises near mast.Perhaps, the mechanism of air compressor or pivoted mast can provide power by source of AC.Yet,, must make power supply with source of AC usually in the place that light source finally is provided with extension mast.Usually need source of AC to be because the light intensity of using on the extension mast.The power supply that needs 110 volts or 220 volts is so that the enough light intensity that provide the wrecker effectively to work.

Such source of AC is moved by the gasoline engine generator that hangs up an alternating current generator usually, and this alternating current generator is connected with light source by electric wire then.In general, although can house generator, source of AC be provided by power actuated vehicle itself usually.Source of AC fitness for purpose vehicle or electrical generator turn round to drive light source always.Because rescue or during other purpose needed the emergency condition of light source, electrical generator or vehicle can not be very important with light gasoline.If run out of gas, electrical generator will be closed, and lamp extinguishes automatically.

There is two kinds of dissimilar interchanges (AC) power supply to be normally used for pneumatic extension mast.Most typical electric wire directly is connected to light source from the emergency vehicles alternating current generator.Thereby emergency vehicles are given light source power supply by alternating current generator, and other function of pneumatic mast is moved by direct current (DC) power supply.The selection of other source of AC comprise a separation is provided provide gasoline direct current generator and alternating current generator for oneself.Yet such device is not a representative type, because provide dynamo generator for oneself and alternating current generator is unnecessary to ac generator of vehicle not only, and also too heavy and can not be installed in the top of most of emergency vehicles.Common in the well-known and prior art, source of AC needs the heavy weight insulated line to prevent fires or get an electric shock.Cause so additional to the bigger volume and weight of mast because during mast flexible, lead must be pulled on and leave behind.Like this, with required the comparing of other method, telescoping mechanism needs bigger charge capacity and work is more difficult.All the more so when temperature traverse.For example, low temperature causes the representative type electric wire insulation layer to become not flexible and lacks elasticity, thereby when the structure bar extends, needs telescoping mechanism more to require great effort work with the stretching electric wire.

Some system of the extension mast of prior art has used 12 volts of direct supplys as optimization power supply.These systems comprise the mechanism that makes mast pivoting action between horizontal and vertical position, and pneumatic control mechanism.Usually, these systems can move, and directly link to each other with lead with Vehicular battery.Yet in some cases, these same mast systems will be with providing DC power supply for oneself, and do not link to each other with vehicle.Therefore, pneumatic control mechanism or compressor and the typically operation (being 12V or 24V direct current (DC) rather than 110V or 240V alternating current) under the power supply lower of mechanism that makes the mast pivoting action than light source voltage, and surely move providing for oneself under the direct supply.Yet, because light source must move under source of AC, so light source must link to each other with the power generating system of emergency vehicles always.Therefore, pneumatic extension mast is not easy to transfer to other emergency vehicles, because they must integrally be connected on the source of AC of main car.The internal part of the AC system whole pneumatic structure bar that distributes.This has increased manufacturing cost and initial required time of assembling.Like this, also be not easy and other types of devices exchange that can be placed on the antenna at the lamps and lanterns of extension mast end by ac power supply.For example, these devices can comprise emission or receiving wire, registration device or signalling apparatus.The installation of different electric apparatuss needs whole rewiring usually, and this must be complicated.Even the replacement light fixture also is complicated and trouble.The requirement of current commonality and interchangeability is not satisfied in such design.

Therefore, main purpose of the present invention provides a kind of pneumatic extension mast, overcomes the shortcoming of prior art pneumatic extension mast, it is characterized in that the extension mast manufacturing is economical, assembling is simple, and combination only relies on the electric component realization of a DC power system usually.The present invention allows extension mast and emergency light source use and the same power supply of pneumatic control system or mast pivoting action system, thereby simplifies whole design and increase the alerting ability that uses.

This feature and further feature of the present invention are implemented in the pneumatic extension mast of horizontal mast shafts relative direction motion supporting, this mast comprises between the telescopic location mutually slidably adjacent expansion section.The pneumatic control mechanism that provides is used for movable mast section between telescopic location.The pivoting action mechanism that provides allows and controls the pivoting action that mast is centered around an axle between the horizontal and vertical position.Mast comprises the light source that is installed on the telescopic section, and direct supply, and this power supply is given light source power supply, also gives other power consumption part power supply of extension mast.

The feature more specifically according to the present invention, direct supply are returned hinge mechanism and pneumatic control mechanism or compressor power supply.Providing current transformer near the light source place; The place directly converts direct current (DC) to alternating current at lamp socket.In a preferred embodiment, light source and current transformer are installed in the sealing module.This module comprises the radiator near current transformer, and it is detachable with current transformer that radiator also can be used as one unit.

Direct supply can be the direct supply of any standard, comprises 12V battery or 24V power supply.In one embodiment, direct supply can be provided by vehicle battery, and it keeps charging by engine and electric generator of vehicle and recharges.

According to a further aspect in the invention, extension mast provides a DC machine mechanism, and it comprises one first motor, is used for the dead position parallel motion light source of relative mast, and one second motor, be used for the dead position vertical shifting light source of relative mast.In a preferred embodiment of the invention, light source is the metal halogen light source, presses the lumen test, and for desired direct supply, it provides largest light intensity.

Therefore, a main purpose of the present invention has provided a kind of pneumatic extension mast, has a kind of improved light source that obtains electric energy from a direct supply at its end.

Another object of the present invention provides a kind of pneumatic extension mast, and required other electric energy of recover working lamp and mast is all by a DC power supply.

Another object of the present invention provides a kind of improved pneumatic extension mast, and it provides a kind of than other extension mast failure-free light source more, and does not need source of AC.

Of the present invention also have a purpose to provide a kind of improved pneumatic extension mast, can not close suddenly when car engine is flame-out.

Of the present invention also have a purpose to provide a kind of improved pneumatic extension mast, wherein can do to such an extent that lighter and wiring expense is lower to the connection lead of light source, therefore reduced the required gaseous tension of flexible mast, alleviated along the weight of mast length, and reduced the load and the burn-down of electric motor of motor in the hinge mechanism.

In addition, another object of the present invention provides an extension mast utility light as single sealing module.

By reading and understanding stating in detail of following preferred embodiment and chat, to the one skilled in the art, it is clear that above and other objects of the present invention will become.

The profile of some part of the present invention and parts be furnished with physical appearance, its preferred embodiment will be described in detail and illustrated by specification sheets and accompanying drawing:

Fig. 1 is a scheme drawing, and a kind of use of extension mast of the present invention is described;

Fig. 2 is the planar view of extension mast along 2-2 line part cross-sectional plane among Fig. 1;

Fig. 3 is the vertical cross section of extension mast along 3-3 line part cross-sectional plane among Fig. 2;

Fig. 4 is the cross sectional drawing along a feature of 4-4 line the present invention among Fig. 3;

Fig. 5 is the diagram of circuit of The whole control system of the present invention.

With reference to accompanying drawing, only be for the preferred embodiment of the present invention is described shown in it, rather than limit it, Figure 1 shows that an extension mast 10 of on the roof 11 of self-propelled vehicle 12, installing.Mast 10 is displayed on the support place or in advanced positions, by the arrow A mark, is parallel to roof 11.The mast 10 that dots is in the vertical stretching position, and arrow B is perpendicular to roof 11.According to the present invention, mast can be placed on position, oblique angle between 0 to 90-°, for sake of convenience, 0 ° of expression and roof 11 parallel and levels in general, as at position A, and 90 ° of expressions and roof 11 are vertical and in common upright position, B is corresponding with the position.

As shown in the B of position, extension mast 10 comprises adjacent telescopic section 14a-14d.In a preferred embodiment, telescopic section 14a mast 10 than low-mast end 15, and being installed on the base 16 of pivot, and base 16 is installed on the roof 11.Each telescopic section 14a-14d is proportional rigid enclosure pipeline section, is convenient to the pneumatic flexible of extension mast 10.Be installed in mast top 17, promptly telescopic section 14d place is a line box device 21, is convenient at 17 places, mast top placement working lamp 22.

Shown in more detail Fig. 2, base 16 comprises two

rectangular box

24 and 25, passage 26 of middle formation, and extension mast 10 just is placed on therebetween.Each

rectangular box

24,25 comprises

outer wall

31 and 32 respectively.Being included in the box 24 is an air compressor 33, and the formula mast 10 that contracts is used for raising.This compressor preferably can obtain the pressure of 35psi and can move under 12 volts of direct current (DC).Compressor 33 is fixed on the base 16 by support 34.The air of compressor 33 is supplied with/following electromagnetic valve 35 by a polyethylene air supply pipe 36, and by boiler check valve 37 and reducing valve 38 controls.Provide air by a polyethylene supply pipe 42, electromagnetic valve 35 control masts 10 flexible by calibrate valve 43 control presssures on the electromagnetic valve 35.

Being included in the rectangular box 25 is a recliner 44, be fixed in laterally stride across passage 26 and respectively with the outer wall 31 and the 32 fixing actuator shafts 45 of box 24 and 25.Recliner 44 control mast and the angles of mast between position A and B.In a preferred embodiment, recliner 44 is a kind of ball screws, and it has used a kind of ball nut and screw rod.Yet being construed as recliner 44 also can be any known actuator, comprises hydraulic piston.At the other end, actuator shaft 45 is supported by support rack 46 and is fixed in wall 31,32.On the actuator shaft 45 in box 25 between the pivot analog bracket 51 of support rack 46 and recliner 44, placed a cushion block 47.Pivot fixed support 51 is stretched from recliner 44, and is placed on the actuator shaft 45.Therefore, when recliner 44 makes mast 10 between horizontal and vertical position during pivoting action, recliner 44 can rotate slightly around actuator shaft 45.

As shown in, direct current mast drive motor drives tongue-tied bar 53 by gear case 53 and drives recliner 44.The flexible drive linkage 55 of piston rod 53 is around pivot pin 56 rotations that link to each other with linkage 55 with piston rod 53.Then, linkage 55 drives mast shafts 57 and rotates between two extreme positions, and about 90 ° of intervals are so that mast 10 rotates between level (position A) and vertical (position B).Shown in Fig. 2 and 3, when piston rod 53 was in extended position, mast 10 was at level attitude A.As shown in phantom in Figure 3, when piston rod 53 shrank, linkage 55 and axle 57 rotations reached mast 10 and are in vertical position

B.Limit switch

58 and 59 is set at the horizontal and vertical position of mast 10, near the linkage 55 in the box 25.Well-known in this area, such limit switch makes mast 10 stop at two relative extreme positions, as level attitude A and upright position B.

Control circuit board 61 is fixed on the wall 31 in the box 24 by set pin 62.Control desk 61 links to each other with power supply, such as 12 volts of dc-batteries in the vehicle 12.From the signal operation recliner 44 of control desk 61 with pivoting action mast 10 and air compressor 33 with flexible mast 10, will more be described in detail below.Also has helical pipe (nycoil conduit) 63 from what control desk 61 stretched out.As is known in the art, spiral (nycoil) comes down to twine has a hollow cable duct, draws electric wire to light source 22 necessity by it.Electric wire in the helical pipe 63 provides direct supply for the light source 22 on mast top 17.Helical pipe 63 in mast 10 peripheries in the shape of a spiral and can be flexible with mast 10.On mast top 17, helical pipe 63 ends at electric wire box device 21.Wherein, electric wire then continues remote control positioning box 64.

Mast 10 more particularly, Figure 4 and 5 are preferably seen in the operation of light source 22.Direct supply 71, preferably 12 volts or 24 volts of direct supplys offer control desk 61 by electric wire 72.Handle the signal of all operations mast from control desk 61.Control desk 61 links to each other with air compressor 33 by line 73, and links to each other with last/following electromagnetic valve 35 by line 74.According to the signal from control desk 61, the air from air compressor 33 that is provided by supply pipe 75 is provided electromagnetic valve 35, manages 76 rising masts 10 by air for failing.Control desk 61 also provides signal for mast drive motor 52 by line 77, and it starts recliner 44 successively, and mast 10 is moved to the upright position from level attitude, and vice versa.The operator can by on the control panel 82/following switch 81 these each functions of control, control panel 82 provides signal for control desk 61 by line 83.The movable alarm lamp 78 of far-end mast links to each other with control desk 61 by line 79, is placed in the car caution operator when lamp 22 is opened.

Direct supply 71 by control desk 61, to PC plate 84 power supplies of remote control location, is also given

left lamp

85 and 86 power supplies of right lamp by electric wire 87 and electric wire 88 respectively by the electric wire 63a in the helical pipe 63.PC plate 84 is positioned at remote control positioning box 64, is in the same place with a base drive motor 91 and a tilt drive motor 92, and base drive motor 91 links to each other with PC plate 84 with 94 by line 93 respectively with the drive motor 92 that inclines.Control panel 82 allows the operator to control in the motors 91 and 92 each by base/tilt switch 95.Be appreciated that to base drive motor 91 makes light source 22 and rotate with common 360 ° orientation Wiinding cartridge device 21 and the pivot point between the localiser box 64 96.Tilt drive motor 92 make in the

lamp

85,86 each around axle 89 between horizontal and vertical position pivot with motion, with directional guide light source 22 better.The scope of rotating around pivot point 96 limits switch 97 qualifications by base, and limits by the qualification switch 98 that tilts along axle 89 bevelled scopes.

Left lamp 85 is described in detail in detail below.Be appreciated that for right lamp 86 is identical with left lamp 85, therefore the identical narration to right lamp 86 no longer repeats.As shown in the figure, an outer casing device 102 has sealed lamp 85, and one side has glass cover 103.A parasite 104 is with respect to glass cover 103, and a fluorescent tube 105 is placed near parasite 104 places.In a preferred embodiment, fluorescent tube is a metal halid lamp.Fluorescent tube 105 is by in the lamp connector 106 of interlock carry on parasite backing plate 107, and parasite 104 extends out from backing plate 107.Parasite backing plate 107 links to each other with briquetting backing plate 111 by separation pig 112, so that left lamp and spools 89 balances suitably.Briquetting 114 is generally the solid metal plate of known weight, is fixed in briquetting backing plate 111.Briquetting backing plate 111 is linked to each other with a PC lamp plate backing plate 115 by supporting 116.PC lamp plate backing plate 115 links to each other with radiating gill 117, and at interval screw 122 places supporting PC lamp panel device 121.PC lamp panel device 122 comprises a current transformer 123, wherein will convert alternating current to from the direct current (DC) of electric wire 87 before signal is given fluorescent tube 105.This layout has been saved the required source of AC of lamp in the prior art.Lamp 85 also provides assembling screw rod 124.According to dismounting assembling screw rod 124, the internal part of lamp 85 can take apart from covering 102, is used to keep in repair lamp or replaces parts, comprises fluorescent tube 105.Such module box did not also provide in the extension mast lamp box of prior art.The Lighting System of prior art does not provide such versatility.Therefore, the Unitarily molded installation of internal part is another advantage of the present invention.

Advantage of design-calculated of the present invention is to have saved indispensable lead of the required heavy weight of former interchange light fixture and insulator.These heavier thick things are difficult to stretching with mast 10.This places indispensable thing bigger gaseous tension is provided on air compressor 33, the mast section 14a-14d that not only raises, and stretch circulating line 63.Direct supply also is easy to be connected with vehicle and dismantle; Be connected with the Vehicular battery electric wire simply.The present invention has also saved the necessity that is used for many power supplys in the prior art.The present invention need in the past to allow the light source 22 of source of AC only to need direct supply now.This also means does not need vehicle or electrical generator always to work to provide power supply to lamp 22.

Narrated the present invention with reference to preferred embodiment.Obviously, according to reading and understanding these concrete things, other people can make and improve and transform.For example, control desk 82 can be placed in the vehicle, or it is handheld to make the part remote control arbitrarily, thereby allows lamp 22 in car 12 outside fixs.Warning light 78 also can be placed on control desk 82 or be placed on two places, if control desk 82 usefulness hand-held remote controls are selected.In the time of in they enter the right claimed range, should comprise all these improvement and transformation.

Claims

A kind of along horizontal mast shafts in opposite directions in the pneumatic extension mast of pivoting action supporting, described mast comprises telescopic location adjacent expansion section slidably mutually, be used between described telescopic location, moving the air control unit of described mast section, and be used for relative direction along the be pivotable device of described mast of described pivot between the horizontal and vertical position, improvement comprises: described mast comprises the illumination equipment that is used to throw light on that is installed on the joint of one in the described adjacent expansion section, and continuous-current plant, be used for power supply, comprise that power supply gives described illumination equipment and described actuating device to described mast system.
2. the described extension mast of claim 1 is characterized in that described continuous-current plant is to described air control unit power supply.
3. the extension mast of claim 1 comprises the device that is used for direct current (DC) is converted to alternating current near described illumination equipment.
4. the extension mast of claim 3 is characterized in that described transfer device comprises a current transformer near described light fixture.
5. the extension mast of claim 3 is characterized in that described illumination equipment and described transfer device are provided in the sealing module.
6. the extension mast of claim 5 is characterized in that described module comprises a radiator near described transfer device.
7. the extension mast of claim 6 is included in the removable device of fixing described transfer device and described radiator in the described module, dismantles from described single sealing module thereby described transfer device and described heat radiation can be used as the unit.
8. the extension mast of claim 5 comprises the removable fixing device of described transfer device in described single sealing module.
9. the extension mast of claim 1 is characterized in that described illumination equipment comprises a metal halid lamp.
10. the extension mast of claim 1 is characterized in that described continuous-current plant comprises cell apparatus.
11. the extension mast of claim 10 is characterized in that described cell apparatus is 12 volts of voltages.
12. the extension mast of claim 10 is characterized in that described cell apparatus is 24 volts of voltages.
13. a kind of along horizontal mast shafts in opposite directions in the pneumatic extension mast of pivoting action supporting, described mast comprises relative telescopic location adjacent expansion section slidably mutually, be used between described telescopic location, moving the air control unit of described mast section, and the device that is used for carrying out along the described pivot between the horizontal and vertical position in opposite directions the described mast of pivoting action, improvement comprises: described mast comprises an illumination equipment that is used to throw light on that is fixed in the described adjacent expansion section, be used for the DC electric machine of described relatively mast level and the described illumination equipment of perpendicular positioning near described illumination equipment, and be used for to described illumination equipment and described DC electric machine direct current power source supplying power device.
14. the extension mast of claim 13 is characterized in that the device of described pivoting action also links to each other with described continuous-current plant.
15. the extension mast of claim 14 is characterized in that described DC electric machine comprises second motor that is used to horizontally rotate first motor of described illumination equipment and is used for the described illumination equipment of vertical shifting.
16. the extension mast of claim 15 is characterized in that described illumination equipment comprises a metal halid lamp at least.
17. the extension mast of claim 16 is characterized in that described illumination equipment comprises two adjacent metal halide torchs.
18. the extension mast of claim 13 is characterized in that described continuous-current plant is to described air control unit power supply.
19. the extension mast of claim 13 comprises the device that is used for described direct current (DC) is converted to alternating current near described light source.
20. the extension mast of claim 19 is characterized in that described transfer device comprises a current transformer near described illumination equipment.
21. the extension mast of claim 19 is characterized in that described illumination equipment and described transfer device are among a single sealing module.
22. the extension mast of claim 21 is characterized in that described module comprises a radiator near described transfer device.
23. the extension mast of claim 22 comprises described transfer device and described radiator detachably is fixed in device in the described module, dismantles from described single sealing module thereby described transfer device and described radiator can be used as one unit.
24. the extension mast of claim 21 comprises described transfer device detachably is fixed in device in the described single sealing module.
25. the extension mast of claim 13 is characterized in that described illumination equipment comprises a metal halid lamp source at least.
26. the extension mast of claim 13 is characterized in that described continuous-current plant comprises cell apparatus.
27. the extension mast of claim 26 is characterized in that described cell apparatus is 12 volts of voltages.
28. the extension mast of claim 26 is characterized in that described cell apparatus is 24 volts of voltages.
29. a kind of along horizontal mast shafts in opposite directions in the pneumatic extension mast of pivoting action supporting, described mast comprises relative telescopic location adjacent expansion section slidably mutually, be used between described telescopic location, moving the air control unit of described mast section, and the device that is used for carrying out along described pivot between the horizontal and vertical position in opposite directions the bar mast of pivoting action, improvement comprises: described mast comprises the illumination equipment that is used to throw light on that is installed on the joint of one in the described adjacent expansion section, and is used for to described illumination equipment and described air control unit direct current power source supplying power device.
30. a kind of along horizontal mast shafts in opposite directions in the pneumatic extension mast of pivoting action supporting, described mast comprises relative telescopic location adjacent expansion section slidably mutually, be used between described telescopic location, moving the air control unit of described mast section, and the device that is used for carrying out along described pivot between the horizontal and vertical position in opposite directions the described mast of pivoting action, improvement comprises: described mast comprises the illumination equipment that is used to throw light on that is installed on the joint of one in the described adjacent expansion section, and be used for to described illumination equipment direct current power source supplying power, also comprise being directly adjacent to the transfer device that described illumination equipment converts described direct current (DC) to alternating current.