CN205257922U - Car lifting jack working nuts safety alarm system - Google Patents

Abstract

The utility model discloses a car lifting jack working nuts safety alarm system, car lifting jack includes organism, bracket mechanism and the lead screw of vertical setting in the organism, the cooperation is provided with a working nuts on the lead screw, working nuts fixed connection is in in the bracket mechanism, it has the interval setting to be in still to cooperate on the lead screw the safety nut of working nuts's below, the PLC system that working nuts safety alarm system goes up and down including the bracket mechanism that is used for control rack car machine, be connected with the alarm device who is used for sending alarm signal on the output of PLC system, the input is connected with one and installs and be used for detecting on working nuts the displacement sensor of distance between working nuts and the safety nut. The utility model has the advantages of simple structure, easily preparation, the maintenance cost is low, and working nuts's wearing and tearing volume can be monitored to the good reliability, is favorable to improving system security nature and life.

Description

A kind of car lifting J-Horner work nut sacurity alarm system

Technical field

The utility model relates to car lifting J-Horner technical field, relates to especially a kind of car lifting J-Horner work nut sacurity alarm system.

Background technology

Along with the fast development in city, traditional highway communication is blocked up extremely, is difficult to meet the requirement that people are on and off duty and go on a journey. Carrying capacity is large due to one time in track traffic, and operation order of classes or grades at school is many, and collective's regulation and control there will not be the advantage such as block up, and have obtained greatly developing.

In order to ensure the safety of track traffic, after rail vehicle operation a period of time, need to the wheel in bogie to car at the bottom of miscellaneous part overhaul or change, when maintenance, the vehicle of permutation marshalling need to be lifted to certain altitude to change bogie and the miscellaneous part of vehicle bottom.

When maintenance, need to be sling and be separated with chassis in its compartment by fixedly starting shipment equipment or overhead traveling crane, to vehicle is overhauled, and often the vehicle mobile of maintenance is moved to position, this just need to arrange many and fixedly start shipment equipment or overhead traveling crane in maintenance shop, effective work usable floor area in workshop is reduced, equipment increases, especially in the time that multi-section vehicles need overhaul, each need be saved to compartment moves and moves position, therefore the repair time of vehicle is long, take equipment many, efficiency is low, and easily because handling causes colliding with of vehicle, outer surface is undermined there is certain hidden danger, impact safety in production, increase the cost of overhaul, and in the time that use is fixedly started shipment equipment lifting or falls compartment, can not really accomplish to link with rising or same falling, easily have an accident.

Car lifting J-Horner be a kind of from vehicle bottom by the equipment of car body lifting, in lifting process, can not cause damage to car body. The lifting mechanism of car lifting J-Horner has multiple implementation, and wherein a kind of screw nut driven structure that adopts, still, along with using the wearing and tearing of leading screw and nut, the risk that nut falls may occur, and how avoiding nut wearing and tearing to fall afterwards becomes problem demanding prompt solution. Inventor has designed a kind of feed screw nut syndeton, and this structure can reduce the danger of falling after nut wearing and tearing, but how can know in advance that also change in advance nut becomes problem demanding prompt solution to nut wear extent.

Utility model content

For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is: how to provide a kind of simple in structure, be easy to make, maintenance cost is low, good reliability, the wear extent of work nut be can monitor, the security of system and the car lifting J-Horner work nut sacurity alarm system in service life are conducive to improve.

In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:

A kind of car lifting J-Horner work nut sacurity alarm system, described car lifting J-Horner comprises the body of vertical setting, what can move up and down along body rises the carriage mechanism of car body for frame, and be vertically arranged on the leading screw in body, on described leading screw, be equipped with a work nut, described work nut is fixedly connected in described carriage mechanism; On described leading screw, be also equipped with a jam nut, described jam nut is disposed on the below of described work nut; Between described work nut and jam nut, being fixedly connected with can be along the brace of described leading screw axial direction compression, and described work nut and jam nut can be synchronized with the movement by wrapping wire thick stick under the effect of brace; It is characterized in that, described work nut sacurity alarm system comprises the PLC system of the carriage mechanism lifting for controlling car lifting J-Horner, on the output of described PLC system, be connected with the alarm device for sending alarm signal, input is connected with one and is arranged on the displacement transducer for detection of distance between described work nut and jam nut on work nut.

As optimization, described displacement transducer is vertically fixedly mounted on described work nut; The test side of described displacement transducer is towards described jam nut; On described jam nut, the position of corresponding described displacement transducer is provided with a block that can be detected by described displacement transducer, and the distance between described block and displacement transducer is less than or equal to the distance between work nut and jam nut.

As optimization, described alarm device is audible-visual annunciator.

In sum, the utlity model has simple in structurely, be easy to make, maintenance cost is low, and good reliability can be monitored the wear extent of work nut, is conducive to improve the advantage such as security and service life of system.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the car lifting J-Horner that adopts this use new structure.

Fig. 2 is the structural representation of walking mechanism part in Fig. 1.

Fig. 3 is the structural representation of carriage mechanism part in Fig. 1.

Fig. 4 is the structural representation that in Fig. 1, leading screw and body are installed.

Fig. 5 is the structural representation of positioning sleeve part in Fig. 3.

Fig. 6 is the cross-sectional view of Fig. 5.

Fig. 7 be in Fig. 1 leading screw with work nut mounting structure schematic diagram.

Fig. 8 is the mounting structure schematic diagram of nut and side plate of working in Fig. 3.

Fig. 9 is a kind of schematic diagram of the car lifting J-Horner system that adopts this use new structure.

Detailed description of the invention

Below in conjunction with a kind of adopt this to use novel car lifting J-Horner system and accompanying drawing the utility model is described in further detail.

When concrete enforcement: as shown in Fig. 1 ~ Fig. 9, a kind of car lifting J-Horner system, comprise and at least comprise the unwheeling unit of four movable vehicle supportings and for controlling the PLC system 9 of described unwheeling unit synchronization lifting, described movable vehicle supporting comprises the body 1 of vertical setting, be arranged on the walking mechanism 2 that can regulate 1 road clearance of body of body 1 bottom, what can move up and down along body 1 rises the carriage mechanism 4 of car body for frame, and be vertically arranged on the leading screw 31 in body 1, on described leading screw 31, be equipped with a work nut 32, described work nut 32 is fixedly connected in described carriage mechanism 4, on the rotatable top board that is articulated in described body 1 in upper end of described leading screw 31, on the base plate of described body 1, be provided with drive unit 5, the output of described drive unit 5 and described leading screw 31 coaxially arrange, and the lower end of described leading screw 31 is fixedly connected on the output of drive unit 5, the control input end of described drive unit 5 is electrically connected in described PLC system 9.

Like this, adopt leading screw suspended structure in structural design, leading screw is only subject to downward pulling force under any state, without bending stress. Be conducive to improve the service life of car lifting J-Horner. The bottom that drive unit is placed on to car lifting J-Horner can effectively reduce the total height of car lifting J-Horner, makes the center of gravity of car lifting J-Horner lower, hangs and turns safety and steady more, and because transmission system is at the bottom, transmission system has better maintenance.

Wherein, described drive unit 5 comprises the turbine worm reducer 51 being positioned on body 1 base plate, and the turbine of described turbine worm reducer 51 is positioned at the bottom of described leading screw 31, and coaxially arranges with described leading screw 31; On described turbine, have a splined hole arranging with one heart, the lower end of described leading screw 31 is the splined shaft coordinating with this splined hole, and inserts in this splined shaft.

Like this, car lifting J-Horner has adopted the double self-locking function of screw pair self-locking and worm gear pair self-locking, can ensure that unwheeling function what lifting position in office keeps self-locking for a long time, meets the needs of unwheeling work and safety guarantee to greatest extent. Adopt splined shaft to be connected with splined hole and can make the bearing capacity of the two strong, easily self-centering, installation accuracy is high, is conducive to improve transmission efficiency.

Wherein, described drive unit 5 also comprises primary gear speed reducing device 52 and is positioned at the drive motors 53 on body 1 base plate, and input and the output of described primary gear speed reducing device 52 are positioned at the same side; The output shaft of described drive motors 53 is connected with the input of described primary gear speed reducing device 52, and the output of described primary gear speed reducing device 52 is connected with the worm screw of described turbine worm reducer 51.

Like this, adopt such arrangement, can be conducive to make the overall structure of drive unit compacter, be conducive to improve space availability ratio.

Wherein, on the top board of described body 1, be provided with a circular installing hole, in this installing hole, fixed cover is provided with a cylindrical leading screw installation sleeve 35 of entirety, the upper end of described leading screw installation sleeve 35 has outwards outstanding ring flange 351, and this ring flange 351 is bolted on the top board of body 1; In described leading screw installation sleeve 35, there are three grades of stepped holes 352 that diameter diminishes successively from top to bottom; The hole that is positioned at middle part in described stepped hole 352 is set with first thrust bearing 353; The upper end of described leading screw 31 is disposed with the first shaft part 311 from top to bottom, spacing section 312 and the second shaft part 313, and the diameter of the diameter of described the first shaft part 311 and the second shaft part 313 is all less than the diameter of described spacing section 312; The basipetal plug-in mounting of described the second shaft part 313 is engaged in described the first thrust bearing 353 endoporus; On described the first shaft part 311, coordinate second thrust bearing 354 is installed; Described leading screw installation sleeve 35 upper ends are also provided with one for compressing the end cap 355 of described the second thrust bearing 354.

Like this, can make the mounting structure of leading screw simple, facilitate the installation of leading screw, be conducive to the maintaining of leading screw.

Wherein, described leading screw installation sleeve 35 is outer has the two-stage Step Shaft 356 that diameter diminishes successively from top to bottom, and the installing hole diameter being positioned on axis body diameter and described body 1 top board of top matches, and this axis body can be sleeved in the installing hole of body 1 top board; Between the two-stage axis body of described Step Shaft 356, connect by cone transition.

Like this, can more convenient leading screw installation sleeve be installed in body top board, improve efficiency of assembling.

Wherein, described the first thrust bearing 353 is thrust angular contact bearing, and described the second thrust bearing 354 is axial contact bearing. Like this, the service life that adopts thrust bearing to be conducive to improve leading screw.

Wherein, described carriage mechanism 4 comprises bracket 41 and is horizontally set on the prop head 42 in bracket 41; Described bracket 41 comprises that two just to arranging and the side plate 411 that is parallel to each other and for the supporting mechanism of connecting lateral plate 411; Described prop head 42 comprises two side plates 421 that arrange along two described side plate 411 inner sides respectively, and described side plate 421 is connected with tray 422 towards one end of car lifting J-Horner active side; In described tray 422, be provided with the approach switch 95 for detection of car body, described approach switch 95 is electrically connected to the input of described PLC system 9, is connected with the alarm device 91 for sending alarm signal on the output of described PLC system 9.

When concrete use, whether adopt approach switch can detect in real time car body falls in prop head, in the time that the approach switch of one of them prop head does not detect car body, the car lifting J-Horner at other prop head places is by out of service, fall in this prop head until the approach switch in this prop head detects car body, all car lifting J-Horners again synchronously rise or decline. Like this, can realize the synchronous working of car lifting J-Horner, improve the security of system.

When concrete enforcement, can also replace above-mentioned approach switch by working pressure sensor. When concrete use, in the time that the pressure sensor of one of them prop head detects that the pressure signal of car body is zero, the car lifting J-Horner at other prop head places is by out of service, until the pressure sensor in this prop head detects the pressure of car body, all car lifting J-Horners again synchronously rise or decline.

Wherein, the end of described leading screw 31 is coaxially connected with an encoder 96 for detection of leading screw rotating cycle, and described encoder 96 is electrically connected to the input of described PLC system 9. Like this, the leading screw rotating cycle detecting by encoder, the helical pitch of leading screw and the speed reducing ratio of transmission system, can calculate the actual distance that rises or decline of each car lifting J-Horner. Like this, can realize the duty of car lifting J-Horner is fed back, be conducive to improve the synchronization accuracy of car lifting J-Horner.

Wherein, described drive motors 53 is three-phase alternating-current servo motor. Adopt such motor to make transmission system have better action response, meanwhile, can realize the closed-loop control to car lifting J-Horner, improve the operating accuracy of car lifting J-Horner.

Wherein, described approach switch 95 has been arranged in parallel two. Like this, adopt Redundancy Design, can prevent that one of them approach switch from damaging and losing efficacy, and improves the reliability of system.

When concrete enforcement, top at car lifting J-Horner is provided with photoelectric sensor, photoelectric sensor and driving screw synchronous rotary, photoelectric sensor often turns can send fixing number of pulses, by the number of pulses of photoelectric sensor output is detected, can know the angle of driving screw rotation, and then know the height of car lifting J-Horner unwheeling.

Specific formula for calculation is H=L Ψ/360=Lm/n

L-----driving screw helical pitch the Ψ----screw rod anglec of rotation

The umber of pulse that the umber of pulse n----sensor that m----sensor sends often transfers

L and n are constant, and the umber of pulse that the height of visible car lifting J-Horner unwheeling sends to photoelectric sensor is directly proportional.

Contrast processing by the umber of pulse that each car lifting J-Horner photoelectric sensor is sent, just can know each car lifting J-Horner unwheeling highly whether contour, differ how many, and then utilize this difference to produce control signal, can make the high car lifting J-Horner of unwheeling stop waiting for, within waiting to reach and highly differing requirement, more synchronous unwheeling, realize the synchronous unwheeling in control range, because often turning of photoelectric sensor can be exported 6400 pulse signals, useful this control mode can reach quite high precision.

Wherein, be also equipped with a jam nut 33 on described leading screw 31, described jam nut 33 is disposed on the below of described work nut 32; Between described work nut 32 and jam nut 33, being fixedly connected with can be along the brace 34 of described leading screw 31 axial direction compressions, and described work nut 32 can be synchronized with the movement by wrapping wire thick stick 31 with jam nut 33 under the effect of brace 34; The input of described PLC system 9 is connected with one and is arranged on the displacement transducer 92 for detection of distance between described work nut 32 and jam nut 33 on work nut.

When enforcement, because the weight of car body reaches 25 ~ 45 tons, in the course of work, the weight of car body mainly drops on work nut, and jam nut does not bear pressure substantially, and like this, the wear extent of work nut is far longer than the wear extent of jam nut. Once work nut weares and teares, and jam nut does not does not wear and tear, work nut will move down with respect to jam nut, and brace cannot bear the weight of car. Like this, brace will be compressed, and the degree that staff can compress by brace is judged the wear extent of work nut, in advance work nut changed, and prevents dangerous generation. In addition, even if work nut weares and teares completely and drops, the jam nut that is positioned at below also can ensure that carriage mechanism can not fall, and has ensured the safety of car lifting J-Horner.

Wherein, described displacement transducer 92 is vertically fixedly mounted on described work nut 32; The test side of described displacement transducer 92 is towards described jam nut 33; On described jam nut 33, the position of corresponding described displacement transducer 92 is provided with a block 331 that can be detected by described displacement transducer 92, and the distance between described block 331 and displacement transducer 92 is less than or equal to the distance between work nut 32 and jam nut 33.

When concrete use, in PLC system, be provided with work nut wear extent permissible value, the signal of block detected once displacement transducer, the wear extent of explanation work nut has exceeded permissible value, the alarm device being connected with PLC system will be reported to the police, prompting staff changes work nut, avoids dangerous generation, is conducive to improve the security of system.

Wherein, the upper end of described brace 34 is welded on described work nut 32, and the lower end of described brace 34 has the bar hole that length direction vertically arranges, and described brace 34 is by being bolted on described jam nut 33 through this bar hole.

Like this, between brace and work nut, adopt the mode of welding to fix, can prevent that brace is with respect to the motion of work nut; The lower end of brace arranges slotted hole and is conducive to adjust the distance between work nut and jam nut, can ensure synchronously around guide screw movement after the two is connected and fixed.

Wherein, the distance between described work nut 32 and jam nut 33 is 5 ~ 10mm. Like this, reduce the distance between work nut and jam nut, can reduce the impulsive force that the wearing and tearing of work nut are fallen afterwards, improve the safety of whole system.

Wherein, described brace 34 work nut 32 be symmetrically arranged with in the radial direction two. Like this, once there be a connecting bolt on brace loosening, another one brace also can normally be worked, and is conducive to improve the security of car lifting J-Horner.

When concrete enforcement, work nut adopts the frame mode of steel-casting hot charging tin bronze nut. Like this, because the hardness of the hardness ratio cast steel of tin bronze is low, like this, in work nut and the leading screw course of work, the wear extent of work nut is larger, and leading screw will not have too large wearing and tearing, when maintenance, only need to change work nut, be conducive to reduce maintenance cost.

Wherein, described work nut 32 is positioned in the middle of two blocks of described side plates 411 and has along the columniform journal stirrup extending to form to both sides perpendicular to the direction of described side plate 411; The position that described side plate 411 is positioned at corresponding described journal stirrup is provided with the ear muff for this journal stirrup is installed, and described journal stirrup is inserted in a corresponding ear muff; The endoporus of described ear muff is the bar hole vertically arranging; The input of described PLC system 9 is connected with first microswitch 93; Described the first microswitch 93 is arranged on the bar hole below of described ear muff, and the button of described the first microswitch 93 is towards this bar hole and extend in this bar hole.

In the time that car lifting J-Horner synchronously declines, once carriage mechanism is blocked on guide rail, work nut can continue to decline under the effect of leading screw, the journal stirrup of work nut also can move downward, thereby touches first microswitch of ear muff below, and the PLC system connected with the first microswitch will stop the work of synchronizeing decline of car lifting J-Horner, make alarm device send alarm signal simultaneously, notify staff to get rid of fault, be conducive to improve the service life of car lifting J-Horner, and the security of system.

Wherein, described journal stirrup puts a pressure sensor 94 is also installed, and described pressure sensor 94 is positioned at the top of described bar hole, and the test side of described pressure sensor 94 extend in this bar hole down; Described pressure sensor 94 is electrically connected to described PLC system 9.

In the time that car lifting J-Horner synchronously rises, once carriage mechanism is blocked on guide rail, work nut can continue to rise under the effect of leading screw, the journal stirrup of work nut pushes the pressure sensor that is positioned at journal stirrup cover top, thereby make the pressure signal detecting on pressure sensor sharply increase, in the time that the pressure signal of pressure sensor detection exceedes the safety value of PLC default, PLC system will stop the work of the synchronous rising of car lifting J-Horner, make alarm device send alarm signal simultaneously, notify staff to get rid of fault, be conducive to improve the service life of car lifting J-Horner, and the security of system.

Wherein, be vertically provided with the tabular guide rail 11 that it is just right that two are parallel to each other on described body 1, described carriage mechanism 4 is positioned in the middle of two guide rails 11; Described two blocks of side plates 411 parallel with described guide rail 11, and the outer lateral extent of two blocks of side plates 411 and the inner distance of described two guide rails 11 match; Described side plate 411 is provided with some carrying rollers 412 towards a side of corresponding guide rail 11, and the axis of described carrying roller 412 is perpendicular to corresponding side plate 411; Described carrying roller 412 is distributed on the both sides of corresponding guide rail along the width of guide rail 11, and tangent with corresponding guide rail 11 sides.

Adopt such structure, when car lifting J-Horner work, the pressure that guide rail bears will, along the direction of guide rail place plane, like this, can prevent the distortion of guide rail, improves the life-span of system. Said structure is simple, is easy to make. When concrete enforcement, car lifting J-Horner body adopts the low-carbon alloy steel of high-quality to be welded, two liftable automotive chassis guide rails of assembly welding on body, and this guide rail completes machined after assembly welding, guarantees the geometric accuracy of guide rail.

Wherein, on each described side plate 411, be provided with two carrying rollers 412, lay respectively at the both sides of corresponding guide rail 11, and be positioned at the below of another carrying roller 412 near the carrying roller 412 of car lifting J-Horner active side.

Wherein, on each described side plate 411, be also provided with an auxiliary wheel 413, described auxiliary wheel 413 is positioned at away under the carrying roller 412 of car lifting J-Horner active side.

Described in one of them, on side plate 421, be horizontally installed with tooth bar 423; On described bracket 41, along being provided with a rotating shaft perpendicular to the direction of described side plate 411, in this rotating shaft, be fixed with one and described tooth bar 423 meshed gears 414; One end of described rotating shaft is coaxially connected with a circular handle 415 through the side plate 411 of bracket 41.

When concrete enforcement, due to car body model difference, unwheeling position is also different, adopts said structure, can adjust to different unwheeling positions for different car body models, is conducive to improve the scope of application of car lifting J-Horner.

Described in one of them, on side plate 421, there is the equidistant locating hole 424 arranging of some along continuous straight runs, on side plate 411 corresponding to this side plate, there is one and be positioned at the screwed hole of sustained height with described locating hole 424, a detent mechanism is installed in this screwed hole, described detent mechanism comprises positioning sleeve 416 and is slidably arranged on the alignment pin 417 in positioning sleeve 416, and described alignment pin 417 can be inserted in described locating hole 424.

Like this, in unwheeling process, prop head can be fixed, prevent that prop head in unwheeling process from moving and the danger that causes car body to fall, the security that is conducive to improve car lifting J-Horner system.

Wherein, be set with a helical spring 418 in described positioning sleeve 416, described positioning sleeve 416 has first boss forming that radially extends internally away from the position of described bracket 41; Described alignment pin 417 middle parts have second boss forming that radially stretches out; Described the second boss is positioned at the side of described the first boss near described bracket 41; Described helical spring 418 is arranged between the first boss and the second boss, described helical spring 418 in the raw time described in alignment pin 417 can insert in described locating hole 424, and described helical spring 418 in the time of compressive state described in alignment pin 417 can exit described locating hole 424.

Adopt said structure, can make alignment pin under nature, keep stretching out state, when use alignment pin is while being fixed, alignment pin can accidental and cause danger. Be conducive to improve the security of system.

Wherein, described positioning sleeve 416 has the draw-in groove arranging along its length away from the end, one end of described bracket 41, and this draw-in groove connects and arranges along positioning sleeve 416 radial direction; Described alignment pin 417 has a card column extending to form to both sides along its radial direction away from one end of described bracket 41, and described card column can slip in described draw-in groove. When concrete enforcement, the length of draw-in groove and alignment pin stretch out positioning sleeve length while stretching out matches. Like this, in the time that needs are adjusted prop head position, the card column of alignment pin can be pulled out from draw-in groove, and rotate an angle, make to block on the body that drops on positioning sleeve. Like this, can make alignment pin be retracted in positioning sleeve, conveniently the position of prop head be adjusted.

Wherein, the outside of described positioning sleeve 416 has symmetrically arranged two planes that are parallel to each other. Like this, can positioning sleeve be clamped spanner easy to use, be conducive to the installation of positioning sleeve.

Wherein, described walking mechanism 2 comprises the hydraulic cylinder 21 being vertically arranged on the sidewall that body 1 deviates from active side, and described hydraulic cylinder 21 bottoms are provided with rear roller 22; Described hydraulic cylinder 21 bottoms are also hinged with an entirety and are inverted L shaped depression bar 23, the kink of described depression bar 23 is hinged on described body 1, the both sides of described depression bar 23 end broad ways down are respectively hinged with a straight-bar 24 arranging towards the oblique top of active side, the other end of described straight-bar 24 is hinged with an entirety leg-of-mutton gripper shoe 25 in obtuse angle, the obtuse angle place of described gripper shoe 25 and the base plate hinged of described body 1; Described gripper shoe 25 is provided with front wheel 26 towards the Yi Jiaochu of active side, and the input of described PLC system 9 is connected with and is arranged on the second microswitch 97 whether landing for detection of described body 1 base plate on body 1 base plate.

Adopt said structure, when hydraulic cylinder stretches out, rear roller moves down with respect to body, and meanwhile, hydraulic cylinder also moves down front wheel by the bar linkage structure of depression bar, straight-bar and gripper shoe composition with respect to body, thereby makes body be lifted away from ground. Like this, can facilitate the movement of car lifting J-Horner. But pressure when walking mechanism can not be born body framework and risen, when frame rises, need to ensure that animal economy falls to the ground. The second microswitch is installed on organism soleplate, whether can detect body falls to putting in place, do not fall to putting in place once body, PLC system cannot start car lifting J-Horner lifting, make alarm device send alarm signal simultaneously, remind staff that body is fallen to putting in place and restart car lifting J-Horner, be conducive to improve the service life of car lifting J-Horner, and the security of system.

Wherein, the position of described rear roller 22 and front wheel 26 correspondences is respectively provided with described second microswitch 97. The base plate entirety that like this, can ensure each car lifting J-Horner falls to putting in place.

Wherein, described gripper shoe 25 is hinged with an installing plate 27 on a jiao of active side, and the middle part of described installing plate 27 and described gripper shoe 25 are hinged, and the two ends of described installing plate 27 are respectively provided with a described front wheel 26. Like this, determine a plane, make overall structure simple for 3 of two front wheels and a rear roller composition.

When concrete enforcement, described rear roller 22 is universal wheel. Like this, in the time of mobile car lifter, facilitate the turning of car lifting J-Horner.

When concrete enforcement, described alarm device 91 is audible-visual annunciator. Like this, can use sound and light to remind staff, guarantee to remind each staff.

A kind of unwheeling unit synchronization lifting method, comprises the steps,

A, obtain the car lifting J-Horner system of said structure.

B, the movable vehicle supporting obtaining in step a is moved to and treats that the frame raise-position of car body that frame rises puts.

C, car body is pushed up in advance; The drive motors 53 that starts described PLC system 9 each movable vehicle supportings of control drives leading screw rotation, drive carriage mechanism 4 to rise, in the time that approach switch 95 detects the car body rising until frame, stop the drive motors 53 of this approach switch 95 place movable vehicle supportings to drive, until all approach switchs 95 all detect the car body for the treatment of that frame rises.

D, Synchronous lifting; Start drive motors 53 that described PLC system 9 controls four movable vehicle supportings simultaneously with identical speed rotation, drive four carriage mechanism 4 synchronously to rise; Until body framework is raised to position.

E, while declining, start drive motors 53 that described PLC system 9 controls four movable vehicle supportings simultaneously with identical speed rotation, drive four carriage mechanism 4 synchronously to decline; Until car body is fallen to putting in place.

When concrete enforcement, above-mentioned PLC system, pressure sensor, approach switch, the each several part such as microswitch and alarm device member self and connected mode are each other all the prior aries that belong to ripe, member self does not belong to the application makes the place of creative contribution to prior art, the place that the application makes creative contribution to prior art is above-mentioned each existing parts to be arranged on the location fix of particular requirement, and its combination is connected, make its can so that detect, improve accuracy of detection, can be used in the control realizing car lifting J-Horner, reach the object of the security that improves car lifting J-Horner.

The foregoing is only preferred embodiment of the present utility model; not taking the utility model as restriction; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims (3)

1. a car lifting J-Horner work nut sacurity alarm system, described car lifting J-Horner comprises the body (1) of vertical setting, what can move up and down along body (1) rises the carriage mechanism (4) of car body for frame, and be vertically arranged on the leading screw (31) in body (1), on described leading screw (31), be equipped with a work nut (32), described work nut (32) is fixedly connected in described carriage mechanism (4); On described leading screw (31), be also equipped with a jam nut (33), described jam nut (33) is disposed on the below of described work nut (32); Between described work nut (32) and jam nut (33), being fixedly connected with can be along the brace (34) of described leading screw (31) axial direction compression, and described work nut (32) can be synchronized with the movement by wrapping wire thick stick (31) with jam nut (33) under the effect of brace (34); It is characterized in that, described work nut sacurity alarm system comprises the PLC system (9) of carriage mechanism (4) lifting for controlling car lifting J-Horner, on the output of described PLC system (9), be connected with the alarm device (91) for sending alarm signal, input is connected with one and is arranged on the displacement transducer (92) for detection of distance between described work nut (32) and jam nut (33) on work nut.

2. car lifting J-Horner work nut sacurity alarm system as claimed in claim 1, is characterized in that, described displacement transducer (92) is vertically fixedly mounted on described work nut (32); The test side of described displacement transducer (92) is towards described jam nut (33); The position of the upper corresponding described displacement transducer (92) of described jam nut (33) is provided with a block (331) that can be detected by described displacement transducer (92), and the distance between described block (331) and displacement transducer (92) is less than or equal to the distance between work nut (32) and jam nut (33).

3. car lifting J-Horner work nut sacurity alarm system as claimed in claim 1, is characterized in that, described alarm device (91) is audible-visual annunciator.