CN201201885Y

CN201201885Y - Bridge worm wheel worm screw type jack

Info

Publication number: CN201201885Y
Application number: CNU2008200863383U
Authority: CN
Inventors: 刘永祯
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-26
Filing date: 2008-04-26
Publication date: 2009-03-04
Anticipated expiration: 2018-04-26

Abstract

A bridge worm wheel worm rod type jack relates to a lifting tool, in particular to a jack for vehicles, while the prior vehicle jacks have the defects such as that the reduction gearbox is large and hard to carry, the manual frame type jack wastes force and has difficult operation, the electric frame type jack has high cost, large structure and high weight. The bridge worm wheel worm rod type jack comprises a speed reduction mechanism and a lifting mechanism, which is characterized in that the speed reduction mechanism comprises a speed reduction box, a worm rod with a power access end and a worm wheel fit with the worm rod, wherein the worm wheel is connected with the lifting mechanism. The bridge worm wheel worm rod type jack fits the worm wheel and the worm rod to reduce speed, having small volume, low weight and portable property, the power access end of the worm rod can be connected with an electric tool to share the motor of the electric tools, therefore reducing the cost, the volume and the weight of the bridge worm wheel worm rod type jack. The bridge worm wheel worm rod type jack has simple maintenance, overcomes the high force consumption and difficult operation of the manual jacks, and avoids adding motor such as the electric jacks to prevent the increase of volume, weight and cost.

Description

Bridge Worm-gear type jack

[technical field]

The utility model relates to a kind of lifting implement, particularly a kind of automobile-used jack.

[background technology]

At present, the stent-type jack, simple in structure, can satisfy the lifting requirement of dilly, because to automotive servicing with change the tire process and often be used to, make it become a kind of instrument that carries with car, especially grow distance travel and need and oneself handle under the situation of accident, carrying of jack, power-operated wrench is essential.

But existing stent-type jack has following shortcoming:

1, often adopt big pinion to realize deceleration, reinforcement, the reducing gearbox size is big, and is not portable.

2, the stent-type jack is divided into manually and electronic two classes; Both all have undesirable part:

A, manual stent-type jack are in actual use, must be hand-manipulated, expend bodily strength very much, to women, old person particularly discomfort, in addition, jack often places under the roadlice chassis, therefore the operator can only stay outside the car and the centre of body weight ground proximity is operated, very inconvenient, especially on rainy day or muddy road, operation is inconvenience very;

B, electronic stent-type jack, it has electro-motor alone, can not be with the shared motor of the power-operated wrench that carries with car, thus cost is higher, the integral structure size more greatly, comparatively heavy, inconvenience is carried.

[utility model content]

The technical assignment of the technical problems to be solved in the utility model and proposition is that the prior art scheme is improved and improved, and a kind of bridge Worm-gear type jack is provided, and volume is little, and is in light weight, cooperates with miscellaneous equipment to realize electric operating.For this reason, the utility model is taked following technical scheme:

Bridge Worm-gear type jack comprises speed reduction gearing, lifting mechanism, it is characterized in that: the worm gear that described speed reduction gearing comprises drop-gear box, establishes the worm screw of power incoming end, cooperates with worm screw, described worm gear is connected with lifting mechanism.Adopt worm gear, worm screw to cooperate and slow down, big pinion deceleration volume is little and in light weight under the condition of same speed ratio, is more suitable for carrying with car; Worm screw is established the power incoming end, can connect power tool, make the motor of power tool become common motor, the particularly cooperation of the power-operated wrench that carries with jack, output shaft with power-operated wrench is connected with the power incoming end of establishing of worm screw, realizes the purpose of common motor, and the volume of equipment cost reduction, equipment, weight are reduced, and need not to bring convenience to maintenance during maintenance because of the repair and replacement instrument plugs electric power connection line.Both overcome the consumption power and inconvenience of manual jack operation, also exempted electronic jack increases volume, weight and the cost of jack because of the need motor shortcoming.

As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature:

Described lifting mechanism comprise a pair of establish lifting platform go up to lift arm, a pair of following trailing arm of establishing base, with the affixed screw rod of worm gear and cooperates and drives the nut of act arm and following trailing arm with screw rod, the upper end pivot joint of described upward act arm lower end and following trailing arm.Nut can be fixed in the articulated section of lifting arm and following trailing arm; The rotation of worm screw drives worm gear and rotates, the screw rod that is fixed in worm gear is rotated, and with screw rod nut engaged sway under the driving of screw rod, the act arm is that corresponding swing is done at the center with the articulated section with following trailing arm thereby drive upward, realize moving up and down of lifting platform, reach the automobile lifting purpose.Adopt mechanical ascending and descending, volume is little, in light weight, maintenance is convenient, reliable operation, can satisfy the lifting purpose of miniature car, avoids hydraulic jack to take place because of reasons such as leakage of oil cause the unable even invalid situation of work.

The switching of lifting platform upper end has rotary head.Rotary head lifting platform relatively rotates, and makes the jack position easy to adjust, operates more flexible.

Described lifting mechanism is provided with limiting and protecting device.The stroke of lifting up and down of the limiting and protecting device restriction jack of lifting mechanism; protection jack and connection motor; prevent from danger to occur because of negligence of operation; descend, lifting is excessive; screw rod and last act arm reach down, and trailing arm interferes; damage jack and make motor that stall causes the damage of motor because resistance is excessive.

Described limiting and protecting device comprise up and down travel switch, with travel switch connecting wire and wire nipple.The travel switch up and down of described limiting and protecting device can be positioned on the screw rod, also can be positioned to lift on arm or the following trailing arm.

The described a pair of last arm upper end of lifting is hinged with lifting platform respectively, and described a pair of following trailing arm lower end is hinged with base respectively.No matter in lifting or decline process, stable working, and stressed evenly.

The structure of described a pair of upward act arm and a pair of trailing arm down is symmetry all.Lifting platform is moved on parallel, improve stable working.

Described go up to lift arm and down trailing arm cut compacting by sheet material and form, both all have an opening surface, described going up lifted arm and the opening surface of trailing arm is relative down.Not only reduced material, and formed container cavity, in order to hold screw rod, nut, travel switch, lead etc.

Be provided with bearing between described worm screw, worm gear and the deceleration box, the power incoming end of described worm screw is stretched in the casing drop-gear box outward.The power incoming end is used to connect power, and the incoming end shape is equipped with the rotation that realizes worm screw mutually with the shape of external piece.

The power incoming end of described worm screw is hexagon.It is convenient, reliable to insert.

Beneficial effect:

1, adopts the deceleration transmission of worm gear, worm screw, effectively reduce jack volume and weight.

2, jack self is not furnished with motor, with the motor of the power tool that carries together as public motor, its output shaft and worm screw establish that overhanging power end matches and the electric up-down of realizing jack, it is little to have volume, advantage in light weight, that cost is low, in maintenance process, need not to plug attaching plug, improved work efficiency, save time and laborsaving because of the replacing instrument.

3, jack adopts symmetrical scissors-type lifting, is easy to maintenance, reliable operation.

4, rotating rotary head is established in the lifting platform upper end, and jack can make things convenient for, reliably place.

5, underarm adopts sheet material to cut compacting to form on the jack, and economical with materials reduces weight, and forms container cavity and can place screw rod, travel switch etc., and inner component is effectively protected, and improves the reliability of service of jack, and has effectively improved the life-span.

[description of drawings]

Fig. 1 is the utility model birds-eye view structural representation;

Fig. 2 is A-A sectional structure scheme drawing of Fig. 1;

Fig. 3 is the structural representation of a kind of running condition of the utility model;

Fig. 4 is the structural representation of the another kind of running condition of the utility model;

[specific embodiment]

Below in conjunction with embodiment and accompanying drawing and the utility model is further described:

As shown in Figure 1, 2: the utility model comprises speed reduction gearing 1, lifting mechanism 2.The worm gear 13 that speed reduction gearing 1 comprises drop-gear box 11, establishes the worm screw 12 of power incoming end 4, cooperates with worm screw 12, worm gear 13 is connected with lifting mechanism 2.Lifting mechanism 2 comprise a pair of establish lifting platform 21 go up to lift arm 23, a pair of following trailing arm 24 of establishing base 22, with the affixed screw rod 25 of worm gear 13 and cooperates and drive the nut 26 of act arm 23 and following trailing arm 24 with screw rod 25, on lift arm 23 lower ends and following trailing arm 24 the upper end pivot joint.The structure of a pair of upward act arm 23 and a pair of trailing arm 24 down is symmetry all, is left-right symmetric, can be in a pair of arm 23 and a pair of centre of trailing arm 24 down of upward lifting to guarantee lifting platform 21 and base 22, the parallel opposed longer sides motion, and the transmission of exerting all one's strength has stationarity.Trailing arm 24 adopted sheet materials to cut press forming under last act arm 23 reached, and equal tool opening surface, and opening surface is provided with in opposite directions, promptly all towards midway location, formed container cavity, can hold screw rod 25, nut 26 and travel switch, lead etc.Last act arm 23, the connection between trailing arm 24 and the nut 26 can be in the following ways down: be provided with symmetrical screw with two sides, screw rod 25 nut engaged, 26 front and back, two bolts, 6 symmetries are spirally connected respectively with nut 26 after passing the pivoted hole of lifting arm 23, time trailing arm 24; Similar in the pivot joint mode of lifting arm 23 on the left side, lift between arm 23, time trailing arm 24 on the pivot joint mode between the trailing arm 24 and the right side down: drop-gear box 11 affixed strut members 5, two sides are provided with screw before and after it, be spirally connected respectively with it after making two bolts, 6 symmetries pass the pivoted hole of act arm 23, following trailing arm 24, thereby the position, articulated section of going up act arm 23, following trailing arm 24 that is positioned at the left side is fixed.The switching of lifting platform 21 upper ends has rotary head 3, and rotary head 3 can riveting parts 8 riveted way be transferred on lifting platform 21.Lifting mechanism 2 is provided with limiting and protecting device, and limiting and protecting device can comprise travel switch etc., and travel switch can be positioned at the both sides of nut 26, also can be positioned to lift on arm 23 or the following trailing arm 24, and limiting and protecting device can in time be cut off the electricity supply when stroke arrives preset value.A pair of act arm 23 upper ends of going up are hinged by bearing pin 7 and lifting platform 21 respectively, and following trailing arm 24 lower ends are hinged with base 22 respectively in the same way.Be provided with bearing between worm screw 12, worm gear 13 and the casing, stretch in casing drop-gear box 11 outside the power incoming end 4 of worm screw 12, power incoming end 4 shapes and the power access device of worm screw 12 match, and can be shapes such as hexagon.

Working process:

As Fig. 3, shown in 4, in uphill process, power connects the power incoming end of worm screw 12 and makes worm screw rotate that (power can come from together the motor of other instruments such as power-operated wrench that carry with car, perhaps individual motor), the rotation of worm screw 12 drives worm gear 13 corresponding rotations, the screw rod 25 that is fixed on the worm gear 13 is rotated, because of nut 26 does not rotate, causing nut 26 moves to left, because nut 26 is fixed in and lifts arm 23 on the right side, the articulated section of following trailing arm 24, and lift arm 23 on the left side, the stationkeeping of the articulated section of following trailing arm 24, nut 26 moves to left, distance between the left and right arms is reduced, on lift arm 23, the angle increase is ordered about on the lifting platform 21 and is moved between the following trailing arm 24, reaches the purpose of lifting.

The decline process is opposite with uphill process, and screw rod 25 backward rotation move to right nut 26, and the distance between the left and right arms increases, and angle reduces between corresponding upward act arm 23, the following trailing arm 24, orders about lifting platform 21 and descends, and reaches the purpose that resets.

Claims

1, bridge Worm-gear type jack, comprise speed reduction gearing (1), lifting mechanism (2), it is characterized in that: the worm gear (13) that described speed reduction gearing (1) comprises drop-gear box (11), establishes the worm screw (12) of power incoming end (4), cooperates with worm screw (12), described worm gear (13) is connected with lifting mechanism (2).

2, bridge Worm-gear type jack according to claim 1, it is characterized in that: described lifting mechanism (2) comprise a pair of establish lifting platform (21) go up to lift arm (23), a pair of following trailing arm (24) of establishing base (22), with the affixed screw rod (25) of worm gear (13) and cooperates and drives the nut (26) of act arm (23) and following trailing arm (24) with screw rod (25), the upper end pivot joint of described upward act arm (23) lower end and following trailing arm (24).

3, bridge Worm-gear type jack according to claim 2, its feature has rotary head (3) in the switching of described lifting platform (21) upper end.

4, bridge Worm-gear type jack according to claim 3, it is characterized in that: described lifting mechanism (2) is provided with limiting and protecting device.

5, bridge Worm-gear type jack according to claim 4 is characterized in that: described limiting and protecting device comprise up and down travel switch, with travel switch connecting wire and wire nipple.

6, bridge Worm-gear type jack according to claim 5 is characterized in that: described a pair of last arm (23) upper end of lifting is hinged with lifting platform (21) respectively, and described a pair of following trailing arm (24) lower end is hinged with base (22) respectively.

7, bridge Worm-gear type jack according to claim 6 is characterized in that: the structure of described a pair of upward act arm (23) and a pair of trailing arm (24) down is symmetry all.

8, bridge worm gear according to claim 7 (13) worm screw (12) formula jack, it is characterized in that: described go up to lift arm (23) and down trailing arm (24) cut compacting by sheet material and form, both all have an opening surface, and described going up lifted arm (23) and the opening surface of trailing arm (24) is relative down.

9, according to the described bridge Worm-gear type of the arbitrary claim of claim 1-8 jack, it is characterized in that: be provided with bearing between described worm screw (12), worm gear (13) and the drop-gear box bar (11), the outer casing drop-gear box (11) of stretching in of the power incoming end (4) of described worm screw (12).

10, bridge Worm-gear type jack according to claim 9 is characterized in that: the power incoming end (4) of described worm screw (12) is hexagon.