CN207738379U - The motor-driven jack of safe operation - Google Patents

Abstract

The utility model discloses a kind of motor-driven jacks of safe operation, including pedestal, lower support arm, upper support arm, top, lead screw and the power part for driving the lead screw rotation；The lead screw is equipped with fixing piece and can be equipped with the threaded hole passed through for the lead screw in the movable part moved left and right on lead screw, the movable part；Further include guard block, when the movable part is moved to range, the guard block can control the lead screw to stop operating.The utility model can be realized realizes that good top of crossing is protected to equipment, prevents equipment to be damaged, prolongs the service life；Lead screw is directly driven by power part to rotate, and realizes that the automatic lifting of jack, operation are time saving and energy saving.

Description

The motor-driven jack of safe operation

Technical field

The utility model belongs to lifting equipment technology field, more particularly, to a kind of motor-driven jack of safe operation.

Background technology

There are many kinds of classes for current existing jack for vehicles, and the most common are scissor-like jacks.Chinese patent CN106517025A discloses one kind《Scissor-like jack》Comprising bottom base, pedestal, fixing piece and lead screw are presented, lead screw is worn It is located in fixing piece, and fixing piece is stuck in when lead screw rotates and is moved along lead screw；Upper bottom base both ends connect with fixing piece activity respectively It connects, to may make when rotary screw rod, pedestal is mutually unfolded up and down so that distance between the two increases, and realizes top weight lifting Object.But the jack under this kind of structure can only pull lead screw manually to drive lead screw to rotate by spanner, and operation takes very much Power, the smaller adult of strength are difficult with.And its lifting and decline are very slowly, using upper in the presence of greatly inconvenient.

Also, top defencive function was not present on jack, jack still can when jacking or dropping to utmostly External force operation under persistently jacking or lowering action, easily cause the damage of jack, the service life of equipment short.

Utility model content

The utility model for overcome the deficiencies in the prior art, provides a kind of rapid operation, with crossing top defencive function The motor-driven jack of safe operation.

To achieve the goals above, the utility model uses following technical scheme：A kind of motor-driven jack of safe operation, Including pedestal, lower support arm, upper support arm, top, lead screw and power part for driving lead screw rotation；The lead screw It is equipped with fixing piece and the screw thread passed through for the lead screw can be equipped in the movable part moved left and right on lead screw, the movable part Hole；Further include guard block, when the movable part is moved to range, the guard block can control the power part It is stopped.The utility model drives lead screw rotation by power part, under the cooperation of threaded hole and lead screw so that movable part It is moved along lead screw, upper lower support arm generates certain angle change, realizes that jacking or the whereabouts of jack, jack are realized Automatic lifting, rapid operation can facilitate without additionally being operated by tool or using external force the people of strength very little Vehicle is jacked up using jack；And under the driving of power part, the rotating speed of lead screw is very fast, jack stand or whereabouts Speed is very rapid, and work efficiency is high；Pass through the setting of guard block so that jack is being jacked or fallen to utmostly When, guard block is stopped power part is controlled, so that lead screw stops operating, movable part stops movement, jack Just it will not be further continued for work, ensure to realize good protection to equipment, prevent overequipment from jacking or falling and be damaged, prolong Long life.

Preferably, when movable part is moved to inside range, the guard block can control the power part It is stopped；When movable part is moved to inside range, jack is in jacking to maximum position, and jack can at this time Stop continuing to jack under the control of guard block, be damaged to effectively prevent jack to cross top.

Preferably, when movable part is moved to outside range, the guard block can control the power part It is stopped；When movable part is moved to outside range, jack, which is in, drops to maximum position, and jack can at this time Stop continuing to jack under the control of guard block, be damaged to effectively prevent jack to decline excessively.

Preferably, the guard block includes the first limit switch, which is set to pedestal or lower support arm On；When jack jack to utmostly when, lower support arm will touch the first limit switch being arranged on pedestal, to first Limit switch can control power part to be stopped, and stops the jacking operation of jack, prevents jacking from excessively making equipment damage It is bad.

Preferably, the guard block include the second limit switch, second limit switch be set to the upper support arm or In lower support arm；When jack drops to utmostly, upper support arm will touch the second limit being arranged in lower support arm Switch stops the step-down operation of jack to which the second limit switch can control power part to be stopped, and prevents from declining excessive And lead screw is disengaged with movable part.

Preferably, the guard block includes the first limit switch and the second limit switch, which is set to On pedestal or lower support arm, which is set in the upper support arm or lower support arm；Two limit switches can divide Other to be protected to crossing top and crossing bottom two states, no matter in the case of ensureing excessively jacking or excessive descent, jack is equal It can be by good protection.

Preferably, first limit switch is set on the pedestal, which includes can with the pedestal The shell of dismantling connection, the Switch main body in shell, it is scalable action be set to the Switch main body on telescopic head and with institute The matched elastic component of telescopic head is stated, the elastic component is arranged towards the lower support arm；Since elastic component is towards lower support arm Setting so that when jack is jacked in place, lower support arm can be contacted with elastic component so that elastic component presses telescopic head so that Limit switch starts；Elastic component has the function of automatically reseting, and can be automatically returned to after lower support arm disappears to its pressure The phenomenon that state far from telescopic head, guarantee is not in mistakenly stop；Shell is detachable with pedestal, consequently facilitating to limit switch Position is adjusted or is replaced to it, and disassembling operations are very easy.

Preferably, second limit switch is set in lower support arm, which includes and the lower support Shell that arm is detachably connected, the switch pedestal in shell, scalable action be set to button on the switch pedestal and with The matched casting die of button, the casting die are arranged towards the upper support arm；Since elastic component is arranged towards upper support arm, When so that jack being fallen into place, upper support arm can be contacted with elastic component so that elastic component presses telescopic head so that limit is opened Start or stop is dynamic；Elastic component has the function of automatically reseting, and separate stretch can be automatically returned to after lower support arm disappears to its pressure The phenomenon that state of drop-head, guarantee is not in mistakenly stop；Shell is detachable with lower support arm, consequently facilitating to the position of limit switch It sets and is adjusted or it is replaced, disassembling operations are very easy.

Further, the power part be equipped with electrified wire and with the matched power cord of the electrified wire；It is described Electrified wire is equipped with the first connection-peg, and the power cord is equipped with the second connection-peg with the first connection-peg threaded； By the threaded between two connection-pegs, realizes the secured connection between two connection-pegs, be not easy dragged under external force It comes, ensures the case where jack is not in unexpected power-off in use；And threaded also makes the connection of the two Place realizes certain sealing effect, has preferable water resistance, avoids the generation of drain conditions.

Further, the electrified wire is equipped with control and switchs, and the control switch is equipped with rising button and decline Button；By pressing rising button, you can control power part drives lead screw to rotate forward, and driving jack, which rises, jacks up vehicle；It is logical Cross pressing declines button, you can control power part drives lead screw reversion, driving jack to decline；It operates concise, is not easy There is maloperation, uses safer convenience.

Further include a pinion stand, the pinion stand includes bottom plate and the cover board that is detachably connected with bottom plate, the bottom plate with The fixing piece integrated molding is made, and the actuator is fixedly arranged on the fixing piece side；Gear is assemblied in pinion stand, shape On with I to beauty, assembly it is also more easy；By the way that the first connector and bottom plate integrated molding to be made, processing work is simplified Skill improves processing efficiency.

Preferably, the pedestal is equipped with and the matched extension of the actuator；Extension can to actuator into Row support, prevents actuator overweight and so that jack is toppled over because of centre-of gravity shift, more stable safety when jack work.

Further, the connector is equipped with and the matched through-hole of the lead screw, the through-hole wall and the silk Bearing is equipped between bar；Bearing is set between through-hole and lead screw, the frictional force between fixing piece and lead screw can be effectively reduced, is reduced Abrasion, prolongs the service life；And ensure to be not in stuck situation between lead screw and through-hole, reduce machine-spoiled rate.

Further, the power part includes actuator and deceleration component, the actuator by the deceleration component with The screw rod transmission connection；Deceleration-operation is carried out to the speed of actuator by deceleration component, the rotating speed of lead screw will not be too fast, from And the lifting speed of jack pair vehicle is relatively mild, load-bearing capacity is more preferable, and jack is not susceptible to damage, and service life is long.

Further, the deceleration component includes the driving gear being connected with the actuator, is passed with the driving gear The driven gear of dynamic connection and the output gear being sequentially connected with the driven gear, the output gear are connected with the lead screw； Preferably, the diameter of driven gear and output gear is all higher than the diameter of driving gear, in driving gear transfer driven gear In the process, rotating speed will be slack-off, realizes good slowing effect；Meanwhile between gear for engaged transmission, transmission effect it is good, stablize Property is strong, is not susceptible to damage.

In conclusion the utility model have the advantages that it is above：It can be achieved to realize that bottom protection is pushed up or crossed to good cross to equipment, It prevents equipment to be damaged, prolongs the service life；Lead screw is directly driven by power part to rotate, and realizes oneself of jack Dynamic lifting, operation are time saving and energy saving；And the speed of jack stand or whereabouts is very fast, work efficiency is high.

Description of the drawings

Fig. 1 is the stereogram of the utility model.

Fig. 2 is the structural schematic diagram of the utility model.

Fig. 3 is the status diagram that the utility model drops to upper lower support arm when extreme lower position.

Fig. 4 is the enlarged drawing at B in Fig. 3.

Fig. 5 is the vertical view of pedestal in Fig. 3.

Fig. 6 is the status diagram that the utility model rises to upper lower support arm when extreme higher position.

Fig. 7 is the enlarged drawing at B in Fig. 6.

Fig. 8 is the vertical view of pedestal in Fig. 6.

Fig. 9 is the structural schematic diagram of the first top of the utility model.

Figure 10 is the structural schematic diagram of second of top of the utility model.

Figure 11 is the structural schematic diagram of the utility model control switch.

Figure 12 is the partial schematic diagram one of the utility model control switch.

Figure 13 is the partial schematic diagram two of the utility model control switch.

Figure 14 is the partial schematic diagram three of the utility model control switch.

Figure 15 is the partial schematic diagram four of the utility model control switch.

Figure 16 is the cooperation schematic diagram of the utility model electrified wire and power cord.

Figure 17 is the partial schematic diagram of the utility model upper support arm.

Figure 18 is the partial schematic diagram of the utility model lower support arm.

Specific implementation mode

In order to make those skilled in the art be better understood from the utility model, below in conjunction with the utility model reality The attached drawing in example is applied, clear, complete description is carried out to the technical scheme in the embodiment of the utility model.

As shown in Fig. 1-18, a kind of motor-driven jack of safe operation, including pedestal 1, lower support arm 2, upper support arm 3, At least one top 41, with the matched support base 40 of the upper support arm, fixing piece 61, movable part 62, lead screw 10 and be used for Drive the power part of the lead screw rotation；The upper support arm 3 includes the first upper arm 31 and the second upper arm 32, the first upper arm 31 It is hinged with the support base 40 with the upper end of the second upper arm 32, to realize that the activity of the first upper arm 31 and the second upper arm 32 is matched It closes；The lower support arm includes the first underarm 21 and the second underarm 22, the lower end difference of first underarm 21 and the second underarm 22 It is hinged with pedestal, to realize the activity cooperation of the first underarm 21 and the second underarm 22；Specifically, first upper arm 31, Two upper arm 32, the first underarm 21, the second underarm 22 are bent to form by metallic plate, and internal is hollow structure.

The fixing piece 61 is a metal derby, and the lower end of first upper arm 31 can be covered to the fixing piece 61, under first The upper end of arm 21 is covered again to outside the first upper arm 31, later by screw pass through the first upper arm 31, after the first underarm 21 with fixing piece 61 are spirally connected, and the first upper arm 31, the first underarm 21 respectively can be rotated relative to screw, to realize that one end of upper support arm 3 passes through Fixing piece 61 is flexibly connected with 3 one end of the upper support arm；The movable part 62 is a metal derby, under second upper arm 32 End can be covered to the movable part 62, and the upper end of the second underarm 22 is covered again to outside the second upper arm 32, pass through second by screw later It being spirally connected with movable part 62 after upper arm 32, the second underarm 22, the second upper arm 32, the second underarm 22 respectively can be rotated relative to screw, To realize that 2 other end of lower support arm is flexibly connected by movable part 62 with 3 other end of the upper support arm.

The lead screw 10 is rotationally arranged on the fixing piece 61 and movable part 62, specifically, the fixing piece 61 It is equipped with and is equipped with the threaded hole 621 passed through for the lead screw 10 with 10 matched through-hole of the lead screw, the movable part 62, To which movable part 62 can move back and forth when the lead screw 10 rotates along lead screw length direction, so that fixing piece 61 and activity Part 62 is close to each other or is located remotely from each other；In order to reduce the frictional force between through-hole and lead screw, we are in the through-hole wall and institute It states and is provided with bearing 30 between lead screw 10, to effectively reduce frictional force between the two；In this present embodiment, when lead screw is suitable When hour hands rotate, fixing piece 61 and movable part 62 are close to each other so that and the angle between upper and lower support arm becomes larger, and first, second Angle between upper arm becomes smaller, and top can be lifted upwards；When lead screw rotates counterclockwise, 62 phase of fixing piece 61 and movable part It is mutually separate so that the angle between upper and lower support arm becomes smaller, and the angle between the first, second upper arm becomes larger, top can by Lower falling.

As illustrated in figures 4-5, equipment jacking or decline are excessive in order to prevent, we are also provided with guard block 9, the protection Component 9 can control the power part and be stopped when the movable part 62 is moved to range so that lead screw 10 stops Rotation so that jack in jacking to utmostly and when dropping to utmostly, can stop acting, prevent very heavy Top is damaged；In this present embodiment, as shown in figures 3-8, the guard block 9 is limited including the first limit switch 91 and second Switch 92, first limit switch, 91 and second limit switch 92 are connected by an electric wire with the actuator 7 respectively；Such as figure 5, shown in 8, first limit switch 91 is arranged on pedestal 1, and is located proximate in the end position of the first, second underarm； When movable part is moved to inside range, the guard block 9 can control the power part to be stopped；The figure is Status diagram only embodies the matching relationship between lower support arm and guard block 9, is not drawn into remaining part diagram； As shown in Fig. 3,6, second limit switch 92 is set in the lower support arm 2, is preferably provided at the middle position of the first underarm It sets, position is arranged in inside；When movable part 62 is moved to outside range, the guard block 9 can control described dynamic Power component is stopped；The figure is status diagram, only embodies the matching relationship between lower support arm and guard block 9, It is not drawn into remaining part diagram；Certainly in other embodiment, the guard block 9 also can only include the first limit switch 91, top protection was realized to jack, when movable part is moved to inside range, the guard block 9 can control institute Power part is stated to be stopped；Alternatively, the guard block 9 also can only include the second limit switch 92, jack was realized Bottom is protected, and when movable part 62 is moved to outside range, the guard block 9 can control the power part to stop work Make.

Specifically, as shown in Fig. 5,8, first limit switch 91 includes shell 911, Switch main body 912, telescopic head 913 and elastic component 914, the shell 911 be made of plastics, be detachably connected on pedestal by screw；The switch Ontology 912 is embedding inside the shell, and the telescopic head 913 is arranged in Switch main body on the side of the end of the first, second underarm, The telescopic head 913 is connected with a spring, to which telescopic head 913 can be shunk when receiving outer force effect；The elastic component 914 It is arranged on the Switch main body 912, one end is connected with Switch main body 912, and the other end can be stirred with respect to junction, work as elasticity When part 914 stirs, telescopic head 913 described in pressable；The elastic component is a metal clips, it is preferred that 914 court of the elastic component It is arranged to the lower support arm 2, and one end of its overturning is close to the first lower arm ends, and to be bent to form one arc-shaped for the end Lug boss 915；Jack upwards jacking during, the first lower arm ends are gradually routed up outward, will encounter elastic component 914 and by Compression elasticity part 914, to which elastic component 914 presses telescopic head 913 so that telescopic head 913 stops immediately to contract, actuator 7 Action, limit switch so that the principle that motor stopping acts is the prior art, are not repeating.

In other embodiment, first limit switch may also be arranged on the end position of lower support arm, elastic component 914 are arranged towards pedestal；Jack is upwards during jacking, and the first lower arm ends are gradually routed up outward, and elastic component 914 touches To pedestal, to which elastic component 914 presses telescopic head 913 so that telescopic head 913 is acted to contract, the stopping immediately of actuator 7, Limit switch so that the principle that motor stopping acts is the prior art, is not repeating.

Specifically, as shown in Fig. 4,7, second limit switch 92 includes shell 921, switch pedestal 922, button 923 And casting die 924, the shell 921 are made of plastics, are detachably connected in lower support arm by screw；The switch base Body 922 is in shell 921, and the button 923 is arranged on the side in switch pedestal 922 close to upper support arm, the button 923 It is connected with a spring, to which button 923 can be shunk when receiving outer force effect；The casting die 924 is arranged in the switch On pedestal 922, one end is connected with switch pedestal 922, and the other end can be stirred with respect to junction, when casting die 924 stirs, can be pressed Press the button 923；The casting die 924 is a metal clips, it is preferred that the casting die 924 is set towards the upper support arm 2 It sets, and one end of its overturning, closer to upper support arm, and the end is bent to form an arc-shaped bending part 925；Jack During decline, upper and lower support arm moves closer to, and upper support arm will encounter casting die 924 and press casting die 924, to casting die 924 pressing buttons 923 so that button 923 is to contract, and the stopping immediately of actuator 7 action, it is dynamic that limit switch so that motor stops The principle of work is the prior art, is not being repeated.

In other embodiment, second limit switch may be disposed in upper support arm, and casting die 924 is towards lower support arm Setting, during jack declines, upper and lower support arm moves closer to, and lower support arm will encounter casting die 924 and press casting die 924, to which casting die 924 presses button 923 so that button 923 makes to contract, the stopping immediately of actuator 7 action, limit switch The principle for obtaining motor stopping action is the prior art, is not being repeated.

Specifically, the power part includes actuator 7 and deceleration component 8, the actuator 7 passes through the deceleration component 8 It is sequentially connected with the lead screw 10；The actuator 7 is motor, which is connected to attaching plug, which is inserted into In the cigarette lighter socket of automobile, motor is powered by automobile power source；The deceleration component 8 include driving gear 81, from Moving gear 82 and output gear 83, and the diameter of the driving gear 81 is less than the straight of the driven gear 82 and output gear 83 Diameter；The driving gear 81 and the drive shaft of motor are connected, and one end of lead screw is solid with output gear 83 after first connecting portion Even；Further, 10 end of the lead screw is equipped with is with 83 matched connector 101 of the output gear, the connector 101 It is fixed on the plastic part of lead screw end, the bearing 30 is sheathed on outside the connector 101;The driven gear 82 is arranged in master Between moving gear 81 and output gear 83, one side is meshed with driving gear 81, and the other side is meshed with output gear 83；Also Including a pinion stand 5, the pinion stand 5 includes bottom plate 51 and the cover board 52 that is detachably connected with bottom plate, the driving gear 81, Driven gear 82 and output gear 83 are fixedly mounted on the bottom plate；Preferably, the bottom plate 51 and the fixing piece 61 1 Body formed to be made, manufacturing procedure is more simple.

As shown in figs. 17-18, in order to enable jack is more stable, we are in first upper arm, 31 and second upper arm 32 Junction be provided with a location structure；The location structure includes the first double wedge set on 31 upper end of the first upper arm 311 and the second double wedge 321 set on 32 upper end of the second upper arm, and first double wedge, 311 and second double wedge 321 is mutually Engagement increases the frictional force of the first upper arm 31 and 32 top of the second upper arm, prevents the two from skidding, and guarantee is changed during tire, Angle between the two will not change；Preferably, first double wedge 311 is multiple arcs protrusion, these arcs Bulge clearance is evenly distributed on the stroke face that the first upper arm 31 is in contact with the second upper arm 32；Second double wedge 321 It is evenly spaced to be distributed on the stroke face that the second upper arm 32 is in contact with the first upper arm 31 for multiple arcs protrusion；Ensure two During opposite overturning, the first, second double wedge is mutually twisted person always.

Further, we are also provided with position limiting structure in the junction of first underarm, 21 and second underarm 22；Institute It includes set on the first latch 211 of 21 lower end of the first underarm and set on 22 lower end of the second underarm to state position limiting structure The second latch 221, first latch, 211 and second latch 221 intermeshing；Increase the first underarm 21 and the second underarm 22 The frictional force of lower part prevents the two from skidding, and guarantee is changed during tire, and angle between the two will not change；It is preferred that , first latch 211 is multiple arcs protrusion, these arc protrusions are evenly spaced to be distributed in the first underarm 21 and second On the stroke face that underarm 22 is in contact；Second latch 221 is also multiple arcs protrusion, evenly spaced to be distributed under second On the stroke face that arm 22 is in contact with the first underarm 21；Ensure the two during opposite overturning, the first, second latch is always It is mutually twisted.

As shown in figs. 9-10, the support base 40 is equipped with an installation cavity 401, and the installation cavity 401 is one with interior spiral shell The straight slot of line；The top 4 is equipped with positioning piece 41, and the top 4 may be configured as disc or rectangular, the locating piece 41 For a cylinder, which is fixedly connected on the lower surface of the top 4；Can be split settings between the two, or Integrated molding is made；When come directly towards 4 be placed on support base when, locating piece 41 is inserted into installation cavity 401, by installation cavity 401 with The positioning to top 4 is realized in the cooperation of locating piece 41.

With the present embodiment, the top 4 is set as two, wherein being to be spirally connected between a top 4 and the installation cavity 401 Cooperation is mating between another top 4 and the installation cavity 401；Specifically, the top 4 with 401 threaded of installation cavity Its locating piece 41 is equipped with thread segment 411, by the cooperation between the thread segment 411 and the internal thread of installation cavity 401, realizes top Threaded between head and installation cavity；On the locating piece 41 of mating top and it is not provided with outer spiral shell with installation cavity 401 Line, the top are made of plastics, and locating piece is hollow posts, the outer diameter of hollow posts and the basic phase of the internal diameter of installation cavity made of metal Deng；Connecting pole 42 made of one metal penetrates after passing through top to locating piece, and lower end extend out to locating piece lower part；The peace Be equipped in behaveing affectedly with the 42 matched column chamber of connecting pole, pass through the cooperation of connecting pole 42 and column chamber so that come directly towards and installation cavity Between cooperation it is more stable；Specifically, be interference fit between the connecting pole 42 and the top 4 and locating piece 41, It is connected firmly, is not readily separated.

In other embodiment, the top 4 also can only be set as one, and the installation cavity 401 is one with internal thread Straight slot, lower part is directly connected on the lower surface of support base, and the lower surface of support base is arranged close to the upper surface of lead screw；It is described Locating piece 41 is equipped with thread segment 411, and the degree of thread segment is preferably provided at 5-15cm, is come directly towards by turn, you can control The opposite support base in top is lifted, and realizes the adjustment for coming directly towards height.

Preferably, the actuator 7 is fixedly connected on the bottom plate by screw, and position is in first connecting portion The side locations in first connecting portion are arranged in the same side, and space hold is smaller, reduce volume；The pedestal 1 is equipped with one and extends Portion 13, the extension 13 are extended outward to form by the pedestal side, and extension 13 is located at the actuator lower position, this prolongs Extending portion can increase support ground area, adjust the center of gravity of jack；The left and right sides of the pedestal upwardly extends respectively forms first Connecting plate 11 and the second connecting plate 12, there are spacing, first underarms 21 between the first connecting plate 11 and the second connecting plate 12 It can be placed in the spacing with the lower end of the second underarm 22, and hinged with the first connecting plate 11 and the second connecting plate 12.

As shown in figs. 11 and 15, in order to preferably control the lifting of jack, we are also provided with a control switch 14, should Control switch 14 is electrically connected with the actuator；Specifically, the control switch 14 includes shell 141 and is set in shell 141 Circuit board 142, the shell 141 include upper shell 1411 and lower housing 1412, the circuit board 142 be equipped with switch button 15, the switch button 15 includes rising button 151 and declines button 152；The shell 141 is equipped with pressing component 16, institute It includes the first press section 161 and the second press section 162 to state pressing component 16, and the position of first press section 161 is corresponding to upper The setting of 151 position of button is risen, the position of second press section 162 is arranged corresponding to 152 position of declines button；When pressing first When press section 161, you can pressing rising button 151 so that actuator rotates, and driving jack rises；When pressing second When press section 162, you can pressing declines button 152 so that actuator inverts, and driving jack declines；Concrete principle is The prior art repeats no more；In order to which operating personnel correctly control the lifting of jack, we are arranged on the first press section 161 The mark for rising arrow is provided with the mark for declining arrow on the second press section 162 so that operating personnel can be according to mark Know the working condition of motor when pressing different pressing components, and then correctly controls the lifting of jack.

Further, a pressing piece 17 is equipped between the pressing component 16 and switch button 15, the shell is equipped with With the 17 matched open slot 18 of pressing piece；18 shape of the open slot is circle, and the pressing piece 17 is plastic circular piece, The diameter of plastic circular piece is slightly smaller than the diameter of open slot；It is downwardly extending an extension on the central part position of pressing piece 17 Portion 171,171 bottom of the extension are in contact with switch button 15；Since pressing piece 17 and extension 171 are all by plastics system At lighter weight, so switch button 15 will not move down while providing support force to pressing piece 17；Preferably, 17 lower part of the pressing piece is provided with a circle and limits edge 172, which extends outward to form convex for 17 lower part of pressing piece Platform；18 inner wall of the open slot be equipped with the matched rib 181 of the limit edge, the rib 181 be 18 inner wall of open slot to The circle bulge loop inside extended to form；In assembly, rib 181 and limit edge 172 are inconsistent, prevent pressing piece from excessively entering opening In slot.

The upper shell 1411 is equipped with multiple fixing pieces 20, which is the spiral shell being installed on upper shell 1411 Column, upper shell 1411 are equipped with connecting pole, and upper-lower casing is each passed through connecting pole and stud in assembly by screw, you can Realize the fixation of upper-lower casing；The circuit board 142 is equipped with and 20 matched fixed part 145 of fixing piece, the fixed part 145 be the semicircular fluting being arranged on 142 both sides of circuit board, and when assembly, fixing piece is caught in fluting, you can is realized pair The positioning of circuit board.

A LED light 71 is connected with by electric wire on the circuit board 142, the shell 141 is equipped with and is passed through for LED light 71 Hole 81, when jack works, LED light can light, and provide convenience for night maintenance activity；142 bottom of the circuit board Portion is connected with the first fixing piece 144 and the second fixing piece 145, specifically, first fixing piece, 144 and second fixing piece 145 To be welded on two relays 144 of 142 bottom of circuit board, concrete structure repeats no more.

As shown in figure 16, the power part connects an electrified wire 23, and the electrified wire 23 passes through a power cord 24 It is electrically connected with the power supply of automobile cigarette lighter, 24 one end of power cord is equipped with the connector coordinated with the electric power connecting of automobile cigarette lighter, should Connector is the prior art, is repeated no more；The electrified wire 23 and power cord 24 are conventional electric wire, and structure repeats no more；Institute It states 23 one end of electrified wire with the actuator to be connected, the other end is equipped with the first connection-peg 25；24 other end of the power cord Equipped with the second connection-peg 26, which can be mating with the first connection-peg 25；Specifically, first connection-peg 25 include housing 251 and the cylindrical plug 252 in housing, 252 outer surface of the plug and 251 inner surface of the housing Between have gap, the housing 251 and plug 252 are made of plastics；The plug 252 is equipped with two spliced eyes 253, grafting Copper wire is equipped in hole；Second connection-peg 26 includes joint body 262, the open slot 263 on the joint body and leads Electric column 264, when the first, second connection-peg is connected, the plug 252 is inserted into open slot 263, and conductive column 264 can be inserted Enter to spliced eye 253, realizes being electrically connected for electrified wire 23 and power cord 24；The conductive column 264 is made of metal, preferably Copper material is made.

The first, second connection-peg disengages during jack use in order to prevent, we are also provided with lock-bit component, should Lock-bit component includes a movable sleeve 27, which is equipped with the opening 271 passed through for the power cord, so that movable Cover moving up and down be sheathed on outside the power cord；Internal thread is equipped in the movable sleeve 27, on first connection-peg 25 Equipped with external screw thread, to after the first, second connection-peg grafting, movable sleeve and with the first connection-peg threaded so that first, Second connection-peg can not disengage, and effectively prevent first connection-peg, 25 and second connection-peg 26 mutually de- in use It opens；Preferably, 26 upper end of the second connection-peg has extended outward to form the gear of a circle along 261, the gear that is somebody's turn to do can be with along 261 Opening inner wall cooperation on movable sleeve contradicts；Further, the movable sleeve 27 is equipped with the anti-skidding convex ribs 272 of multiple bar shapeds, These anti-skidding convex ribs 272 enclose evenly spaced distribution along 27 outer surface one of movable sleeve.

Conductive column damages in order to prevent, we are provided with rotation stop knot between the plug 252 and the open slot 263 Structure, the spline structure include set on the stopper protrusion 28 of 263 inner wall of the open slot and on the plug 252 and the limit The matched limiting groove in protrusion 29；The stopper protrusion 28 and limiting groove 29 are strip setting, when the first, second grafting When head grafting, stopper protrusion can be caught in limiting groove, and the first connection-peg just can not be rotated relative to the second connection-peg；It is preferred that , the control switch is set on the electrified wire 23, and the shell 141 is equipped with the through-hole passed through for electrified wire 23.

Obviously, described embodiment is only a part of the embodiment of the utility model, instead of all the embodiments. It is obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present invention Every other embodiment should all belong to the range of the utility model protection.

Claims (10)

1. a kind of motor-driven jack of safe operation, including pedestal (1), lower support arm (2), upper support arm (3), top (4), silk Bar (10) and power part for driving lead screw rotation；The lead screw is equipped with fixing piece (61) and can be in left on lead screw The movable part (62) moved right, the movable part (62) are equipped with the threaded hole (621) passed through for the lead screw (10)；Its feature It is：Further include guard block (9), when the movable part (62) is moved to range, the guard block (9) is controllable The power part is stopped.

2. the motor-driven jack of safe operation according to claim 1, it is characterised in that：When movable part be moved to it is inside When range, the guard block (9) can control the power part to be stopped.

3. the motor-driven jack of safe operation according to claim 2, it is characterised in that：When movable part (62) be moved to When outer range, the guard block (9) can control the power part to be stopped.

4. the motor-driven jack of safe operation according to claim 2, it is characterised in that：The guard block (9) includes First limit switch (91), first limit switch (91) are set in pedestal (1) or lower support arm (2).

5. the motor-driven jack of safe operation according to claim 3, it is characterised in that：The guard block (9) includes Second limit switch (92), second limit switch (92) are set in the upper support arm (3) or lower support arm (2).

6. the motor-driven jack of safe operation according to claim 3, it is characterised in that：The guard block (9) includes First limit switch (91) and the second limit switch (92), first limit switch (91) are set to pedestal (1) or lower support arm (2) On, which is set in the upper support arm (3) or lower support arm (2).

7. the motor-driven jack of safe operation according to claim 6, it is characterised in that：First limit switch (91) On pedestal, which includes the shell (911) being detachably connected with the pedestal, in shell Switch main body (912), it is scalable action be set to the Switch main body on telescopic head (913) and with the matched bullet of the telescopic head Property part (914), the elastic component (914) towards the lower support arm (2) be arranged.

8. the motor-driven jack of safe operation according to claim 5 or 6, it is characterised in that：Second limit switch (92) it is set in lower support arm (2), second limit switch (92) includes the shell being detachably connected with the lower support arm (921), the switch pedestal (922) in shell, it is scalable action be set to the switch pedestal on button (923) and with it is described The matched casting die of button (924), the casting die (924) are arranged towards the upper support arm (3).

9. the motor-driven jack of safe operation according to claim 1, it is characterised in that：The power part is equipped with logical Electric lead (23) and with electrified wire (23) the matched power cord (24)；The electrified wire (23) is equipped with the first grafting Head (25), the power cord (24) are equipped with the second connection-peg (26) with the first connection-peg threaded.

10. the motor-driven jack of safe operation according to claim 9, it is characterised in that：On the electrified wire (23) Equipped with a control switch (14), the control switch is equipped with rising button (151) and declines button (152).