CN2773036Y

CN2773036Y - Electric jack

Info

Publication number: CN2773036Y
Application number: CN 200520100412
Authority: CN
Inventors: 吕贵峰; 梁高辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-28
Filing date: 2005-01-28
Publication date: 2006-04-19
Anticipated expiration: 2015-01-28

Abstract

The utility model discloses an electric jack which avoids the defects of the existing hydraulic jack, such as complex structure, low safety factor and inconvenient use by a female. The electric jack comprises a worm gear, a worm and a screw bolt, wherein the worm gear is engaged with the worm. The utility model is characterized in that the screw bolt penetrates through a centre hole of the worm gear, and the external threads of the screw bolt are engaged with the threads on the wall of the centre hole of the worm gear. A dynamic input gear is arranged on the worm, and the dynamic input gear receives the output power of a motor. The screw bolt is provided with a position limiting device which limits the circumferential rotation of the screw bolt.

Description

Electronic jack

Technical field

The utility model relates to a kind of top and lifts machinery, relates in particular to a kind of electronic jack.

Background technology

Jack can replace the manpower top to lift some heavier objects, and existing jack is fluid pressure type mostly.Its complex structure, working medium be aging because of pipeline often, breaks through pipeline easily when jack is worked, and leak from pipeline, causes safety misadventure.In addition, the fluid pressure type jack also needs manpower to operate when work, and this has certain difficulty for ladies.

Summary of the invention

For overcome existing fluid pressure type jack structure complexity, easily cause safety misadventure, be not suitable for the defective that the women uses, the utility model technical issues that need to address are: the electronic jack that a kind of new structure is provided, it is simple in structure, and the safety factor height is convenient to use.

For solveing the technical problem, technical solution adopted in the utility model: a kind of electronic jack, comprise worm gear, worm screw, screw rod, described worm gear and worm mesh, it is characterized in that described screw rod passes the centre hole of worm gear, screw-threaded engagement on the outside thread of described screw rod and the described worm gear center hole wall, described worm screw is provided with power input wheel, and described power input wheel is accepted the outputting power of motor; Be provided with inhibiting device on described screw rod, described inhibiting device limits the circumferential rotation of screw rod.Need the top to lift when weighing thing, connect the motor power motor and rotate, worm screw is accepted the power of motor by the power input wheel of establishing thereon, rotates thereby drive worm gear.Because of screw rod under the effect of inhibiting device, circumferentially can not rotate, under the effect that worm gear rotates, screw rod can move up and down along worm-wheel shaft, thereby heavy thing and the purpose of putting down weight are lifted in practicable top.Because the effect of self-locking is arranged between worm gear and worm screw and worm gear centre hole and the screw rod, electronic jack of the present utility model can be raised the weight top, and can remain on certain position, and the safety factor height has satisfied actual use needs.And do not need manpower just can raise the weight top, easy to use, even the women also can operate easily.

As preferably, described motor is provided with power output wheel, and the power load-transfer device connects power output wheel and power input wheel.Use load-transfer device as transmission of power intermediary, be convenient to rationally be provided with the position of motor, make the compact overall structure of electronic jack.

As preferably, described power output wheel, power input wheel are sprocket wheel, and described power load-transfer device is a chain.With chain, sprocket wheel conducting structure, can make power transmission stable as power.

As preferably, described motor is located on the lower shoe, and described worm gear is provided with the worm gear boss, this worm gear boss be provided with the worm gear centre hole in screw thread be the screw thread of one; Main supporting base is connected on the lower shoe by support, and described main supporting base is provided with penetrating shrinkage pool, and described worm gear boss is located in the described shrinkage pool, and both are free-running fit; Described screw rod passes described shrinkage pool.Be provided with shrinkage pool on main supporting base, set worm gear boss free-running fit on itself and the worm gear can also can be carried out radial location to worm gear simultaneously so that worm gear can rotate.

As preferably, the lower part of described shrinkage pool is provided with the undergauge bulge loop, is provided with bearing between the upper surface of the lower surface of described worm gear boss and described undergauge bulge loop, and described bearing upper surface is slightly less than the axial dimension of worm gear boss to the axial distance of shrinkage pool upper surface.Be provided with bearing and improved the alerting ability that worm gear rotates, reduced the watt loss of jack when the top act weighs thing, increased the limit of jack top weight lifting amount.

As preferably, described bearing is a cylindrical bearing.It is big that cylindrical bearing has a load-carrying capacity, and the stable and reliable operation advantage has increased jack and can push up the weight range of lifting heavy thing.

As preferably, on main supporting base, be connected with the worm screw base, described worm screw base is provided with worm bearing, and worm screw is connected on the worm bearing.Worm screw is connected on the worm bearing set on the worm screw base, compact overall structure.

As preferably, in worm bearing, be provided with graphite oilless sintered-metal bearing, described worm screw is connected in the graphite oilless sintered-metal bearing.When act weight of heavy in jack top was big, the radial force of worm screw was relatively large, and the lubricating oil in the graphite oilless sintered-metal bearing just can ooze out, and improves the alerting ability of worm screw rotation.

As preferably, described inhibiting device is a clamp, and its two ends are provided with prong, and the centre is connected the bottom of screw rod, and described prong is connected on the support slidably.Inhibiting device simple in structure, be convenient to processing, reasonably utilized the space when being assembled on the jack, make the compact conformation of whole jack, and can limit the axial maximum displacement of screw rod, avoided excessive, and the outside thread of the negative thread of worm gear centre hole and screw rod has been damaged because of the screw axial displacement.

As preferably, be provided with in the upper end of screw rod and add long column, the described long column that adds is connected with screw flight.When needs are pushed up the weight of act, the position at its force-applied position is higher, when perhaps needing to make weight to be given rise to higher position, can turn add long column, and the initial position of screw rod is promoted, and has increased the Applicable scope of jack, and it is highly convenient to regulate.

Therefore, the beneficial effect of the electronic jack of the utility model: simple in structure, compact, easy to use, save time, stablize, safety factor is high, frictional power loss is low, and is applied widely, long service life, top lifting force amount is big.

Description of drawings

Fig. 1 is the sectional side elevation of the electronic jack of the utility model;

Fig. 2 is the front view of the electronic jack of the utility model.

The specific embodiment

Fig. 1 illustrates, the major part of the electronic jack of the utility model is worm screw 1, worm gear 14, screw rod 15, wherein worm screw 1 and worm gear 14 engagements, screw rod 15 passes the centre hole that is located at the worm gear center, and the outside thread of screw rod 15 is meshed with negative thread on the worm gear centre hole hole wall.

Be provided with motor 4 on the lower shoe 6 of the electronic jack of the utility model, the form that it can clip is connected on the lower shoe 6, perhaps directly bolt up on lower shoe 6.Motor 4 is provided with power output wheel 5, and as can be seen from Figure, this power output wheel 5 is a sprocket wheel.Be provided with the power input wheel (not shown) in the end of worm screw, the structure of set power output wheel 5 is consistent on the structure of this power input wheel and the motor 4, as can be seen from Figure 2, carry out the conveying of power by power load-transfer device 18 between power input wheel and the power output wheel 5, structure between power output wheel 5 and the power input wheel is corresponding, and power load-transfer device 18 also can be chain.

On lower shoe 6, be provided with support 9, can be provided with carrier base 8 in the bottom of support 9, described carrier base 8 by bolted connection on lower shoe 6.The upper end of support 9 is provided with main supporting base 10, the center of described main supporting base 10 is provided with penetrating shrinkage pool, and worm gear 14 is provided with worm gear boss 13, and this worm gear boss 13 is located in the described shrinkage pool, both are free-running fit, the worm gear boss be provided with the worm gear centre hole in screw thread be the screw thread of one.In order to improve the alerting ability of worm gear 14 when rotating, the lower part that is located at the penetrating shrinkage pool at main supporting base 10 centers can be provided with a undergauge bulge loop 11, that is to say the internal diameter of the internal diameter of these undergauge bulge loop 11 centre holes less than above-mentioned shrinkage pool, between the upper surface of the lower surface of worm gear boss 13 and undergauge bulge loop 11, can be provided with bearing 12, these bearing 12 preferred cylindrical bearings.Bearing 12 upper surfaces are slightly less than the axial dimension of worm gear boss 13 to the axial distance of shrinkage pool upper surface, can make bearing 12 give full play to its effect like this.

The shrinkage pool that screw rod 15 passes main supporting base 10 centers also extends downwards, and pushes up the surplus that longitudinal travel is provided when act weighs thing for jack.Be provided with the inhibiting device that restriction screw rod 15 circumferentially rotates in the bottom of screw rod 15, this inhibiting device can be a clamp 7, its two ends have prong, this prong is connected on the support 9 slidably, the middle part of clamp 7 is connected the bottom of screw rod 15, and it can use jump ring and screw rod 15 clamping mutually, also can be provided with nut in the bottom of screw rod 15, in order to fastening clamp 7, perhaps directly be welded on the bottom of screw rod 15.The axial dimension of prong should guarantee that clamp 7 can run to the downside place of main supporting base 10 with the bottom of screw rod 15 on the clamp 7, and is not separated by support 9.

Can be provided with a Ka Tai on the lateral surface of main supporting base 10, worm screw base 3 can be by bolted connection on the upper surface of this Ka Tai.Be provided with two worm bearings 2 on worm screw base 3, the two ends of worm screw 2 are located at respectively on two worm bearings 2.In order to improve jack when the bigger weight of top weight lifting amount, the rotation alerting ability of worm screw 1 can be provided with graphite oilless sintered-metal bearing 17 in worm bearing 2, and graphite oilless sintered-metal bearing 17 can be positioned by jump ring, and worm screw 2 is connected in the graphite oilless sintered-metal bearing 17.Sometimes in order to reduce the deadweight of jack, worm bearing 2, that worm screw base 3 can be the plastics one is injection molded.

Lifting distance when pushing up act weight thing in order to improve jack, can be provided with in the upper end of screw rod 15 and to add long column 16, the described long column 16 that adds is threaded with the upper end of screw rod 15, adds long column 16 by hand-screw, just can reach improve jack top weight lifting object distance from purpose.

Claims

1, a kind of electronic jack, comprise worm gear, worm screw, screw rod, described worm gear and worm mesh, it is characterized in that described screw rod (15) passes the centre hole of worm gear (14), screw-threaded engagement on the outside thread of described screw rod (15) and described worm gear (14) the center hole wall, described worm screw (1) is provided with power input wheel, and described power input wheel is accepted the outputting power of motor (4); Be provided with inhibiting device on described screw rod (15), described inhibiting device limits the circumferential rotation of screw rod (15).

2, electronic jack according to claim 1 is characterized in that described motor (4) is provided with power output wheel (5), and power carries (18) band to connect power output wheel (5) and power input wheel.

3, electronic jack according to claim 2 is characterized in that described power output wheel (5), power input wheel are sprocket wheel, and described power load-transfer device (18) is a chain.

4, according to claim 2 or 3 described electronic jacks, it is characterized in that described motor (4) is located on the lower shoe (6), described worm gear (14) is provided with worm gear boss (13), this worm gear boss (13) be provided with the worm gear centre hole in screw thread be the screw thread of one; Main supporting base (10) is connected on the lower shoe (6) by support (9), and described main supporting base (10) is provided with penetrating shrinkage pool, and described worm gear boss (14) is located in the described shrinkage pool, and both are free-running fit; Described screw rod (15) passes described shrinkage pool.

5, electronic jack according to claim 4, the lower part that it is characterized in that described shrinkage pool is provided with undergauge bulge loop (11), be provided with bearing (12) between the upper surface of the lower surface of described worm gear boss (13) and described undergauge bulge loop (11), described bearing (12) upper surface is slightly less than the axial dimension of worm gear boss (13) to the axial distance of shrinkage pool upper surface.

6, electronic jack according to claim 5 is characterized in that described bearing (12) is a cylindrical bearing.

7, according to claim 5 or 6 described electronic jacks, it is characterized in that on main supporting base (10), being connected with worm screw base (3), described worm screw base (3) is provided with worm bearing (2), and worm screw (1) is connected on the worm bearing (2).

8, electronic jack according to claim 7 is characterized in that being provided with graphite oilless sintered-metal bearing (17) in worm bearing (2), and described worm screw (1) is connected in the graphite oilless sintered-metal bearing (17).

9, according to claim 1 or 2 or 3 or 5 or 6 or 8 described electronic jacks, it is characterized in that described inhibiting device is a clamp (7), its two ends are provided with prong, and the centre is connected the bottom of screw rod (15), and described prong is connected on the support (9) slidably.

10, electronic jack according to claim 9 is characterized in that being provided with in the upper end of screw rod (15) and adds long column (16), and the described long column (16) that adds is threaded with screw rod (15).