CN208684289U - Variable-ratio motor-driven jack - Google Patents
Variable-ratio motor-driven jack Download PDFInfo
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- CN208684289U CN208684289U CN201821317600.0U CN201821317600U CN208684289U CN 208684289 U CN208684289 U CN 208684289U CN 201821317600 U CN201821317600 U CN 201821317600U CN 208684289 U CN208684289 U CN 208684289U
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Abstract
The utility model relates to technical field of jacks, specifically be a kind of variable-ratio motor-driven jack, including mounting shell (1), feed screw nut jack component (2), transmission shaft (3), shaft (4) and driving unit (5)；The transmission shaft (3) has the first station and second station in the axial direction thereof, the mounting shell (1) is equipped with the Switch of working position mechanism for switching transmission shaft (3) on the first station and second station, when transmission shaft (3) is in the first station, the driving wheel (10) is engaged with first order driven gear (8) by the first clutch structure (11)；When transmission shaft (3) is in second station, the driving wheel (10) is engaged with second level driven gear (9) by the second clutch structure (12).At least providing a kind of station can switch, the variable-ratio motor-driven jack that jacking rate can change.
Description
Technical field
The utility model relates to technical field of jacks, specifically be a kind of variable-ratio motor-driven jack.
Background technique
Current existing jack is substantially divided to two classes, and one kind is using hydraulic lifting, and one kind is jacked using screw rod
Mode.Although top lift is big in use for the hydraulic jack of hydraulic lifting, there are sealing ring aging oil leaks, by environment
It is affected.The jack of component is jacked using feed screw nut, configuration motor and a certain proportion of subtrahend case can be fabricated to electronic
Jack, it is such it is very heavy determine reduction ratio design when just set, jack jack when according to original setting rate operate, push up
Raising speed rate is immutable.
The jacking that jack is frequently utilized for oversize vehicle is used as Auxiliary support, is installed on vehicle frame, and vehicle is to guarantee
There is safe passability, the screw rod jacking position of jack needs a higher distance from the ground, therefore to the reason of jack
Wanting to claim be before contacting ground (i.e. when light condition), and jack jacking rate is very fast, guaranteed efficiency；Contiguously
After face, when jacking vehicle (when load condition), jack jacking rate is slack-off, guarantees jacking stability.Therefore, work as use
When the motor-driven jack of the prior art, it will have the disadvantage that jacking rate is immutable, it is difficult to meet above-mentioned requirements.
In addition, the motor-driven jack of the prior art, is not provided with distance caging device, in that way it is possible to cause electronic very heavy
Feed screw nut in top jacks component and excessively jacks or shrink, caused by stuck or structural instability phenomenon.Alternatively, the prior art
In distance caging device in two close to switch, be set up directly on feed screw nut jack component two extreme positions, this
Sample not only makes the internal structure of motor-driven jack complicated, but also circuit trace also bothers, and has much room for improvement.
Utility model content
The utility model aims to solve at least one of above-mentioned technical problem.
Technical problem to be solved in the utility model is at least to provide a kind of station to switch, and jacking rate can become
The variable-ratio motor-driven jack of change.
To solve the above problems, the variable-ratio motor-driven jack of the utility model, including mounting shell, feed screw nut's jacking group
Part, transmission shaft, shaft and driving unit, transmission shaft and shaft are rotatably connected in mounting shell, one end of transmission shaft and silk
Stem nut jacks Component driver connection；It is fixed with first order driving gear and second level driving gear in shaft, turns on transmission shaft
Dynamic to be connected with first order driven gear and second level driven gear, first order driving gear engages company with first order driven gear
It connects, second level driving gear engages connection with second level driven gear, and driving unit is fixed on mounting shell, driving unit and
Level-one driving gear is drivingly connected；Driving wheel is further fixed on transmission shaft, driving wheel is located at first order driven gear and the second level
Between driven gear, the first clutch structure, driving wheel and second level driven tooth are equipped between driving wheel and first order driven gear
The second clutch structure is equipped between wheel, transmission shaft has the first station and second station in the axial direction thereof, sets on mounting shell
There is the Switch of working position mechanism for switching transmission shaft on the first station and second station, when transmission shaft is in the first station
When, driving wheel is engaged with first order driven gear by the first clutch structure；When transmission shaft is in second station, driving wheel with
Second level driven gear is engaged by the second clutch structure.
After adopting the above structure, it at least has the advantages that since transmission shaft has the first station in the axial direction thereof
And second station, transmission shaft are flexibly connected in its axis direction, Switch of working position mechanism can make transmission shaft in the first station and the
Switch on two stations, in this way, driving wheel and first order driven gear pass through the first clutch knot when transmission shaft is in the first station
Structure engagement, second level driven gear idle running at this time is not to play transmission effect；When transmission shaft is in second station, driving wheel
It is engaged with second level driven gear by the second clutch structure, first order driven gear idle running at this time is made to not play transmission
With, in design, the transmission ratio and second level driving gear of first order driving gear and first order driven gear and the second level from
The transmission ratio of moving gear is different.In this way, that is to say, that when transmission shaft is in the first station and second station, feed screw nut top
Rising component is to be jacked or shunk at different rates, realizes the function of speed change at work, thus lifting jack
Working performance.
Preferably, the transmission ratio of first order driving gear and first order driven gear is less than second level driving gear and second
The transmission ratio of grade driven gear；Switch of working position mechanism includes end cap, spring and end face bearing, and one end of transmission shaft passes through peace
The first mounting hole setting on the shell wall of shell is filled, end cap is fixed on mounting shell and is located at end part of driving shaft position, and end cap has
Installation cavity, end face bearing are slidably connected in installation cavity, the side of end face bearing and the end abutment of transmission shaft, end face bearing
Side is abutted with one end of spring, and the other end of spring is abutted in the interior bottom of end cap, and the radius of end face bearing is greater than the first peace
The radius in hole is filled, the outer end face of the first mounting hole forms the first confined planes, mounting plate is equipped in mounting shell, and mounting plate has second
Mounting hole, transmission shaft and the second mounting hole are rotatablely connected, and the second mounting hole is equipped with limited step, transmission shaft far from the side of end cap
It is equipped with positive stop lug boss；When variable-ratio motor-driven jack zero load, the elastic force of spring pushes against end face bearing and the first confined planes,
Transmission shaft is in the first station；When the load of variable-ratio motor-driven jack, load pushes against positive stop lug boss and limited step, transmission
Axis is in second station.After combining these technical characteristics, when variable-ratio motor-driven jack zero load, the elastic force of spring makes end face
Bearing and the first confined planes push against, and transmission shaft is in the first station, and when the load of variable-ratio motor-driven jack, load makes limit convex
Platform and limited step push against, and transmission shaft is in second station, are equivalent to the first station and the second work when realizing unloaded and load
The automatic switchover of position, in addition, the transmission ratio of first order driving gear and first order driven gear be less than second level driving gear with
The transmission ratio of second level driven gear, thus, in variable-ratio motor-driven jack zero load, feed screw nut jacks the movement speed of component
Degree is greater than speed when load, and therefore, the application realizes the unloaded station with when load and automatically switches, also, in zero load
The movement speed that feed screw nut jacks component is very fast, guarantees the efficiency in unloaded stage, saves the time, and in load, feed screw nut is pushed up
The movement speed for rising component is slower, guarantees to stablize progress, the stability of proof load in load.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the application variable-ratio motor-driven jack.
Fig. 2 is diagrammatic cross-section when the application variable-ratio motor-driven jack is in the first station.
Fig. 3 is diagrammatic cross-section when the application variable-ratio motor-driven jack is in second station.
Fig. 4 is the schematic diagram of the first distance caging device in the application variable-ratio motor-driven jack.
Fig. 5 is the structural schematic diagram of the first distance caging device in the application variable-ratio motor-driven jack.
Fig. 6 is the schematic diagram of second of distance caging device in the application variable-ratio motor-driven jack.
Fig. 7 is the structural schematic diagram of second of distance caging device in the application variable-ratio motor-driven jack.
Wherein:
1, mounting shell；2, feed screw nut jacks component；3, transmission shaft；4, shaft；5, driving unit；6, first order driving tooth
Wheel；7, second level driving gear；8, first order driven gear；9, second level driven gear；10, driving wheel；11, the first clutch knot
Structure；12, the second clutch structure；13, end cap；14, spring；15, end face bearing；16, the first mounting hole；17, installation cavity；18,
One confined planes；19, mounting plate；20, the second mounting hole；21, limited step；22, positive stop lug boss；23, mounting base；24, shell；
25, it is driven input gear；26, gear ring；27, the first metal needle；28, the second metal needle；29, the first close switch；30, it second connects
Nearly switch；31, metal needle mounting hole；32, the first duplicate gear；33, the second duplicate gear；34, transmission gear；35, film roll
Band；36, directive wheel；37, clockwork spring box；38, reel；39, limit card slot；40, clockwork spring.
Specific embodiment
It will hereinafter use those skilled in the art to lead to the essence that others skilled in the art convey them to work
The term being often used describes the utility model concept of the disclosure.However, these utility model concepts can be presented as many differences
Form, thus should not be considered limited to embodiments described herein.These embodiments are provided so that present disclosure more
Range that is detailed and complete, and completely conveying it to include to those skilled in the art.It must also be noted that these embodiments not phase
Mutually repel.Component, step or element from one embodiment, which may be assumed that into, may be present in another embodiment or uses.Not
In the case where the range for being detached from embodiment of the disclosure, institute can be substituted with diversified alternative and/or equivalent implementations
The specific embodiment for showing and describing.The application is intended to cover any modification or modification of embodiments discussed herein.For this
For the technical staff in field obviously alternative embodiment can be practiced using only some aspects in described aspect.Herein
For purposes of illustration, specific number, material and configuration are described in embodiment, however, the technical staff in field is not having
In the case where there are these specific details, alternative embodiment can also be practiced.In other cases, crowd may be omitted or simplified
Well known feature, so as not to make illustrative embodiment be difficult to understand.
In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is set
Have ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements；Term " fixation " can be that bolt is fixedly connected and/or screw is fixed connects
It connects and/or is clamped and/or weld, for the ordinary skill in the art, can understand that above-mentioned term exists with concrete condition
Concrete meaning in the utility model.
Such as Fig. 1-7, in one embodiment, a kind of variable-ratio motor-driven jack, including mounting shell 1, feed screw nut are jacked
Component 2, transmission shaft 3, shaft 4 and driving unit 5, the transmission shaft 3 are rotatably connected in mounting shell 1 with shaft 4, institute
The one end and feed screw nut for stating transmission shaft 3 jack component 2 and are drivingly connected；6 He of first order driving gear is fixed in the shaft 4
Second level driving gear 7 is rotatably connected to first order driven gear 8 and second level driven gear 9 on the transmission shaft 3, described
First order driving gear 6 engages connection, the second level driving gear 7 and second level driven gear 9 with first order driven gear 8
Engagement connection, the driving unit 5 are fixed on mounting shell 1, and the driving unit 5 is drivingly connected with first order driving gear 6；
Driving wheel 10 is further fixed on the transmission shaft 3, the driving wheel 10 is located at first order driven gear 8 and second level driven gear
Between 9, the first clutch structure 11, the driving wheel 10 and second are equipped between the driving wheel 10 and first order driven gear 8
The second clutch structure 12 is equipped between grade driven gear 9, the transmission shaft 3 has the first station and second in the axial direction thereof
Station, the mounting shell 1 are equipped with the Switch of working position mechanism for switching transmission shaft 3 on the first station and second station,
When transmission shaft 3 is in the first station, the driving wheel 10 is engaged with first order driven gear 8 by the first clutch structure 11；
When transmission shaft 3 is in second station, the driving wheel 10 is engaged with second level driven gear 9 by the second clutch structure 12.
Feed screw nut jacks component 2, and the jacking of jack and the function of shrinking may be implemented in rotation, this is existing skill
Art, therefore its specific structure is not described in detail herein.
Since transmission shaft 3 has the first station and second station in the axial direction thereof, transmission shaft 3 is living in its axis direction
Dynamic connection, Switch of working position mechanism can be such that transmission shaft 3 switches on the first station and second station, in this way, when transmission shaft 3 is in
When the first station, the driving wheel 10 is engaged with first order driven gear 8 by the first clutch structure 11, and the second level is driven at this time
The idle running of gear 9 is not to play transmission effect；When transmission shaft 3 is in second station, the driving wheel 10 and the second level are driven
Gear 9 is engaged by the second clutch structure 12, and the idle running of first order driven gear 8 at this time is designing to not play transmission effect
When, transmission ratio and the second level driving gear 7 and the second level of the first order driving gear 6 with first order driven gear 8
The transmission ratio of driven gear 9 is different.In this way, that is to say, that when transmission shaft 3 is in the first station and second station, screw rod spiral shell
Mother's jacking component 2 is to be jacked or shunk at different rates, the function of speed change at work is realized, to be promoted very heavy
The working performance on top.
First clutch structure 11 and the second clutch structure 12 can use structure in the prior art, such as engine clutch
Device etc., this is the prior art, therefore its specific structure is not described in detail herein.
Preferably, such as Fig. 2,3, the transmission ratio of the first order driving gear 6 and first order driven gear 8 is less than described the
The transmission ratio of second level driving gear 7 and second level driven gear 9；The Switch of working position mechanism includes end cap 13, spring 14 and end
Spherical bearing 15, one end of the transmission shaft 3 pass through the setting of the first mounting hole 16 on the shell wall of mounting shell 1, the end cap
13 are fixed on mounting shell 1 and are located at 3 end position of transmission shaft, and the end cap 13 has installation cavity 17, the end face bearing 15
It is slidably connected in installation cavity 17, the side of the end face bearing 15 and the end abutment of transmission shaft 3, the end face bearing 15
Side is abutted with one end of spring 14, and the other end of the spring 14 is abutted in the interior bottom of end cap 13, the end face bearing 15
Radius be greater than the radius of the first mounting hole 16, the outer end face of first mounting hole 16 forms the first confined planes 18, the peace
Fill shell 1 in be equipped with mounting plate 19, the mounting plate 19 have the second mounting hole 20, the transmission shaft 3 with 20 turns of the second mounting hole
Dynamic connection, second mounting hole 20 are equipped with limited step 21 far from the side of end cap 13, and the transmission shaft 3 is equipped with limit convex
Platform 22；When variable-ratio motor-driven jack zero load, the elastic force of the spring 14 pushes against end face bearing 15 and the first confined planes 18,
Transmission shaft 3 is in the first station；When the load of variable-ratio motor-driven jack, load supports positive stop lug boss 22 with limited step 21
Tightly, transmission shaft 3 is in second station.After combining these technical characteristics, when variable-ratio motor-driven jack zero load, the spring
14 elastic force pushes against end face bearing 15 and the first confined planes 18, and transmission shaft 3 is in the first station, when variable-ratio motor-driven jack
When load, load pushes against positive stop lug boss 22 and limited step 21, and transmission shaft 3 is in second station, and being equivalent to realizes zero load
With the automatic switchover of the first station and second station when load, in addition, the first order driving gear 6 and first order driven gear
8 transmission ratio is less than the transmission ratio of the second level driving gear 7 and second level driven gear 9, thus, in variable-ratio electronic thousand
The movement speed that feed screw nut jacks component 2 when jin head space carries is greater than speed when load, therefore, the application realize it is unloaded with
Station when load automatically switches, also, in zero load, the movement speed of feed screw nut's jacking component 2 is very fast, guarantees unloaded rank
Section efficiency, save the time, load when feed screw nut jack component 2 movement speed it is slower, guarantee load when stablize into
Row, the stability of proof load.
The driving unit 5 is decelerating motor.
Mounting base 23 is fixedly connected with outside the mounting shell 1.In this way, facilitate the installation of variable-ratio motor-driven jack, when can
For variable speed power jack on caravan or when special vehicle, feed screw nut jacks component 2 towards when setting, can be used as branch
Leg uses.
The mounting shell 1 is equipped with the distance caging device that 2 stroke of component is jacked for limiting feed screw nut.In this way, can
The excessively jacking of component 2 is jacked to avoid feed screw nut or is shunk, and avoids stuck or structure caused by excessively jacking or shrinking unstable
Determine phenomenon.
Distance caging device can have various structures, and in one embodiment, the first distance caging device is specific
It may is that such as Fig. 4,5, the distance caging device include shell 24, be rotatably connected to transmission input gear in the shell 24
25, duplicate gear component and the gear ring 26 with internal tooth, the transmission input gear 25 are engaged with duplicate gear component, institute
The interior tooth engagement of duplicate gear component Yu gear ring 26 is stated, the outer end of the gear ring 26 is equipped with the first metal needle 27 and the second metal
Needle 28 in the shell 24 and is located at the outside of the gear ring 26 and is fixedly connected with first close to switch 29 and second close to switching
30, the driving unit 5 is drivingly connected with transmission input gear 25；Up stroke terminal is moved to when feed screw nut jacks component 2
When, the first metal needle 27 is abutted with first close to switch 29, when feed screw nut, which jacks component 2, moves to down stroke terminal, the
Two metal needles 28 are abutted with second close to switch 30.In transmission input gear 25, duplicate gear component and with the tooth of internal tooth
Under the transmission effect of circle 26, this way it is possible to realize completing the limit position between larger stroke in limited 24 space of shell
Limit is set, on the one hand ensure that the structural compactness of distance caging device, is on the other hand engagement connection due to being driven directly,
It ensure that the stability of transmission.The reduction gearing that duplicate gear component specifically can be combines or other.Outside the gear ring 26
End is fixed on metal needle installation circumferentially arranged with multiple metal needle mounting holes 31, first metal needle 27 and the second metal needle 28
In hole 31.In this way, it may be convenient to which the position for adjusting the first metal needle 27 and the second metal needle 28 makes it possible to basis and specifically may be used
The stroke length of variable speed power jack adjusts, and ensure that the distance caging device of identical product adapts to different stroke-limits and wants
It asks.
The duplicate gear component includes the first duplicate gear 32 and the second duplicate gear being rotatably connected in shell 24
33, the transmission input gear 25 is engaged with one end of the first duplicate gear 32, the other end of first duplicate gear 32 with
One end of second duplicate gear 33 is engaged, the other end of second duplicate gear 33 and the interior tooth engagement of gear ring 26.Certainly, double
Connection gear assembly is not limited to structure only including the first duplicate gear 32 and the second duplicate gear 33, can be set according to transmission ratio
Count into the structure including multiple duplicate gears.
The driving unit 5 be drivingly connected with transmission input gear 25 specifically may is that the shaft of the driving unit 5 with
Transmission input gear 25 is directly connected to, and is also possible to the driving unit 5 and is connected with transmission input gear 25 by train of reduction gears
It connects.
In another embodiment, it can be described as second of distance caging device, specific structure may also is that such as Fig. 6,7, institute
Stating distance caging device includes shell 24 and film webs 35, and transmission input gear 25 is rotatably connected in the shell 24, is passed
Moving gear 34, directive wheel 36 and the clockwork spring box 37 that can be resetted by elastic force rotation；The transmission gear 34 and transmission
Input gear 25 engages, and is fixedly connected with reel 38 on the transmission gear 34, the reel 38 and transmission gear 34 are coaxial, institute
The one end for stating film webs 35 is crimped on reel 38, and the other end of the film webs 35 is crimped on clockwork spring box 37,
It is equipped with clockwork spring 40 in the clockwork spring box 37, the side of the film webs 35 is overlapped on directive wheel 36, described thin
The both ends of film roll band 35 are respectively fixed with the first metal needle 27 and the second metal needle 28, and the shell 24 is also fixedly connected with first
Close to switch 29 and second close to switch 30, the driving unit 5 is drivingly connected with transmission input gear 25；When feed screw nut pushes up
When liter component 2 moves to up stroke terminal, the first metal needle 27 is abutted with first close to switch 29, when feed screw nut jacks component
2 when moving to down stroke terminal, and the second metal needle 28 is abutted with second close to switch 30.In transmission input gear 25, driving cog
Wheel 34, film webs 35, directive wheel 36, reel 38 and the effect that the clockwork spring box 37 resetted can be rotated by elastic force
Under, reel 38 and clockwork spring box 37 can be crimped and be discharged to film webs 35 in turn, i.e., clockwork spring box 37 can be two
Move back and forth between person, the curling function of film webs 35 may be implemented in limited shell in reel 38 and clockwork spring box 37
The extreme position limit between larger stroke is completed in 24 spaces, on the one hand ensure that the structural compactness of distance caging device.
In addition, being equipped with clockwork spring 40 in clockwork spring box 37, clockwork spring box 37 can be resetted by elastic force rotation, in clockwork spring
Under the action of 40, clockwork spring box 37 makes no matter film webs 35 when moving toward which direction are constantly in tight state,
Guarantee the stability of film webs 35 during exercise, if the not technical characteristic, will lead to the softening of film webs 35 and knot.
Described first is set side by side close to switch 29 and second close to switch 30, and the quantity of the directive wheel 36 is 2,
In directive wheel 36 be located at first close to the side of switch 29, another directive wheel 36 is located at second and approaches switch 30 far from the
The side of one close switch 29.In this way, being equivalent to, first is located at 2 directive wheels 36 close to switch 30 close to switch 29 and second
Between, the film webs 35 between 2 directive wheels 36 at position have preferable tight power, it is ensured that 27 He of the first metal needle
Second metal needle 28 is reliable close to switch 29 and second close to contacting between switch 30 with first.
First close to switch 29 and second approaches switch 30, and this is connect with electric-control system, the first metal needle 27 and first
When being abutted close to switch 29, electric-control system power-off；When second metal needle 28 is abutted with second close to switch 30, electric-control system is disconnected
Electricity.This is the base control mode close to switch, its principle is not repeating herein.
The reel 38 is located at the side of transmission gear 34, the inner wall of the side of the transmission gear 34 and shell 24 it
Between formed film webs 35 wind movement when limit card slot 39.In this way, when film webs 35 are wound, in limit card slot 39
Under the action of, supporting film winding 35 is wound, knotting phenomenon caused by avoiding film webs 35 from deviateing etc..
In addition, the working method of the variable-ratio motor-driven jack in above-described embodiment, includes the following steps:
When feed screw nut's jacking component 2 is in contraction state, start driving unit 5, driving unit 5 drives the first order actively
Gear 6 and second level driving gear 7 rotate forward, and first order driving gear 6 and second level driving gear 7 drive the first order respectively
Driven gear 8 and second level driven gear 9 rotate, at this point, variable-ratio motor-driven jack is unloaded, the elastic force of the spring 14 makes to hold
Spherical bearing 15 and the first confined planes 18 push against, and transmission shaft 3 is in the first station, and driving wheel 10 passes through with first order driven gear 8
The engagement of first clutch structure 11, second level driven gear 9 dally, and first order driven gear 8 drives driving wheel 10 to rotate, driving wheel
10 drive transmission shaft 3 to rotate, and transmission shaft 3 drives feed screw nut to jack component 2 and jacks；It is persistently pushed up when feed screw nut jacks component 2
After rising, variable-ratio motor-driven jack is abutted with carrier, at this point, variable-ratio motor-driven jack loads, load is greater than spring 14
After elastic force, load pushes against positive stop lug boss 22 and limited step 21, and transmission shaft 3 is in second station, driving wheel 10 and the second level
Driven gear 9 is engaged by the second clutch structure 12, and first order driven gear 8 dallies, and second level driven gear 9 drives driving wheel
10 rotations, driving wheel 10 drive transmission shaft 3 to rotate, and transmission shaft 3 drives feed screw nut to jack component 2 and jacks；
When feed screw nut's jacking component 2 is in jacking state, start driving unit 5, driving unit 5 drives the first order actively
Gear 6 and second level driving gear 7 rotate backward, and first order driving gear 6 and second level driving gear 7 drive the first order respectively
Driven gear 8 and second level driven gear 9 rotate, at this point, variable-ratio motor-driven jack loads, load is greater than the bullet of spring 14
Power, load push against positive stop lug boss 22 and limited step 21, and transmission shaft 3 is in second station, and driving wheel 10 and the second level are driven
Gear 9 is engaged by the second clutch structure 12, and first order driven gear 8 dallies, and second level driven gear 9 drives 10 turns of driving wheel
Dynamic, driving wheel 10 drives transmission shaft 3 to rotate, and transmission shaft 3 drives feed screw nut's jacking component 2 to shrink；When feed screw nut's jacking group
After 2 contracts last of part, variable-ratio motor-driven jack and carrier are detached from, at this point, variable-ratio motor-driven jack is unloaded, the spring
14 elastic force pushes against end face bearing 15 and the first confined planes 18, transmission shaft 3 be in the first station, driving wheel 10 and the first order from
Moving gear 8 is engaged by the first clutch structure 11, and second level driven gear 9 dallies, and first order driven gear 8 drives driving wheel 10
Rotation, driving wheel 10 drive transmission shaft 3 to rotate, and transmission shaft 3 drives feed screw nut's jacking component 2 to shrink.
First order driving gear 6 and second level driving gear 7, which rotate forward, to be defined as driving screw rod in the present embodiment
Nut jacks the direction that component 2 jacks, and first order driving gear 6 and second level driving gear 7 rotate backward in the present embodiment
It is defined as that feed screw nut is driven to jack the direction that component 2 is shunk, specific first order driving gear 6 and second level driving gear
7 be along rotate clockwise or rotate counterclockwise then can be depending on the circumstances.Rotating forward and rotating backward is a pair of of phase
Anti- direction.
When variable-ratio motor-driven jack zero load, the elastic force of the spring 14 supports end face bearing 15 with the first confined planes 18
Tightly, transmission shaft 3 is in the first station, and when the load of variable-ratio motor-driven jack, load makes positive stop lug boss 22 and limited step 21
It pushes against, transmission shaft 3 is in second station, and being equivalent to realizes zero load cuts with the first station when load and the automatic of second station
Change, in addition, the transmission ratio of the first order driving gear 6 and first order driven gear 8 be less than the second level driving gear 7 with
The transmission ratio of second level driven gear 9, thus, in variable-ratio motor-driven jack zero load, feed screw nut jacks the movement of component 2
Speed is greater than speed when load, and therefore, the application realizes the unloaded station with when load and automatically switches, also, in zero load
When feed screw nut jack component 2 movement speed it is very fast, guarantee the efficiency in unloaded stage, save the time, the screw rod spiral shell in load
The movement speed of mother's jacking component 2 is slower, guarantees to stablize progress, the stability of proof load in load.
As an improvement, in the above-mentioned methods, driving unit 5 is driving first order driving gear 6 and second level driving gear 7 just
To while rotation, driving unit 5 drives the transmission input gear 25 of distance caging device to rotate, and transmission input gear 25 passes through
Duplicate gear component drives gear ring 26 to be rotated in a first direction, when feed screw nut, which jacks component 2, moves to up stroke terminal, the
One metal needle 27 is abutted with first close to switch 29, and feed screw nut jacks component 2 and stops jacking；Driving unit 5 drives the first order
While driving gear 6 and second level driving gear 7 rotate backward, driving unit 5 drives the transmission input of distance caging device
Gear 25 rotate, transmission input gear 25 by duplicate gear component drive gear ring 26 be rotated in a second direction, second direction with
The rotation direction of first direction is on the contrary, when feed screw nut jacks component 2 and moves to down stroke terminal, the second metal needle 28 and the
Two abut close to switch 30, and feed screw nut jacks component 2 and stops shrinking.This way it is possible to avoid feed screw nut jacks component 2 excessively
Jacking is shunk, and stuck or structural instability phenomenon caused by excessively jacking or shrinking is avoided.In transmission input gear 25, duplex
Under the transmission effect of gear assembly and the gear ring 26 with internal tooth, so that it may which realization is completed in limited 24 space of shell
Between larger stroke extreme position limit, on the one hand ensure that the structural compactness of distance caging device, on the other hand due to
Transmission is directly engagement connection, also ensures the stability of transmission
It is improved as another kind, it may also is that in the above-mentioned methods, driving unit 5 drives first order driving gear 6 and the
While second level driving gear 7 rotates forward, driving unit 5 drives transmission input gear 25 to rotate, and is driven 25 band of input gear
Nutating gear 34 rotates, and transmission gear 34 is rotated with movable reel 38, and reel 38 drives film webs 35 to move along first direction,
Under the action of clockwork spring 40, clockwork spring box 37 makes film webs 35 be constantly in tight state, when feed screw nut jacks
When component 2 moves to up stroke terminal, the first metal needle 27 is abutted with first close to switch 29, and feed screw nut jacks component 2 and stops
Only jack；While driving unit 5 drives first order driving gear 6 and second level driving gear 7 to rotate backward, driving unit 5
Transmission input gear 25 is driven to rotate, transmission input gear 25 is rotated with nutating gear 34, under the action of clockwork spring 40,
The rotation of clockwork spring box 37 resets, and clockwork spring box 37 drives film webs 35 to move in a second direction, and clockwork spring box
37 make film webs 35 be constantly in tight state, and the rotation direction of second direction and first direction is on the contrary, when feed screw nut pushes up
When liter component 2 moves to down stroke terminal, the second metal needle 28 is abutted with second close to switch 30, and feed screw nut jacks component 2
Stop shrinking.This way it is possible to avoid feed screw nut jacks the excessively jacking of component 2 or shrinks, avoid excessively jacking or shrinking causing
Stuck or structural instability phenomenon.In transmission input gear 25, transmission gear 34, film webs 35, directive wheel 36, reel
38 and can by elastic force rotation reset clockwork spring box 37 under the action of, reel 38 can take turns with clockwork spring box 37
Stream is crimped and is discharged to film webs 35, i.e., clockwork spring box 37 can move back and forth between the two, reel 38 and clockwork spring
Box 37 may be implemented to complete the limit between larger stroke in limited 24 space of shell to the curling function of film webs 35
Position limit, on the one hand ensure that the structural compactness of distance caging device.In addition, being equipped with clockwork spring in clockwork spring box 37
40, clockwork spring box 37 can be resetted by elastic force rotation, and under the action of clockwork spring 40, clockwork spring box 37 makes film roll
No matter band 35 when moving toward which direction is constantly in tight state, guarantees the stability of film webs 35 during exercise,
If the not technical characteristic, it will lead to the softening of film webs 35 and knot.
The above is only the preferably feasible implementation example of the utility model, cannot therefore be limitation the utility model
Interest field, it is for those skilled in the art, all to be made with the technical solution of the utility model and technical concept
Other it is various it is corresponding change all should belong within the protection scope of the utility model claims.
Claims (2)
1. variable-ratio motor-driven jack, including mounting shell (1), feed screw nut jack component (2), transmission shaft (3), shaft (4), with
And driving unit (5), the transmission shaft (3) and shaft (4) are rotatably connected in mounting shell (1), the one of the transmission shaft (3)
End jacks component (2) with feed screw nut and is drivingly connected；It is characterized in that, being fixed with first order driving gear on the shaft (4)
(6) and second level driving gear (7) first order driven gear (8), is rotatably connected on the transmission shaft (3) and the second level is driven
Gear (9), the first order driving gear (6) engage connection, the second level driving gear with first order driven gear (8)
(7) connection is engaged with second level driven gear (9), the driving unit (5) is fixed on mounting shell (1), the driving unit
(5) it is drivingly connected with first order driving gear (6)；Driving wheel (10), the driving wheel are further fixed on the transmission shaft (3)
(10) it is located between first order driven gear (8) and second level driven gear (9), the driving wheel (10) and first order driven tooth
Take turns (8) between be equipped with the first clutch structure (11), between the driving wheel (10) and second level driven gear (9) equipped with second from
It closes structure (12), the transmission shaft (3) has the first station and second station in the axial direction thereof, on the mounting shell (1)
Equipped with the Switch of working position mechanism for switching transmission shaft (3) on the first station and second station, when transmission shaft (3) are in the
When one station, the driving wheel (10) is engaged with first order driven gear (8) by the first clutch structure (11)；Work as transmission shaft
(3) when being in second station, the driving wheel (10) is engaged with second level driven gear (9) by the second clutch structure (12).
2. variable-ratio motor-driven jack according to claim 1, which is characterized in that the first order driving gear (6) with
The transmission ratio of first order driven gear (8) is less than the transmission of the second level driving gear (7) and second level driven gear (9)
Than；The Switch of working position mechanism includes end cap (13), spring (14) and end face bearing (15), and one end of the transmission shaft (3) is worn
The first mounting hole (16) setting on the shell wall for being located at mounting shell (1) is crossed, the end cap (13) is fixed on mounting shell (1) and position
In transmission shaft (3) end position, the end cap (13) has installation cavity (17), and the end face bearing (15) is slidably connected at installation
In chamber (17), the side of the end face bearing (15) and the end abutment of transmission shaft (3), the side of the end face bearing (15) with
One end of spring (14) abuts, and the other end of the spring (14) is abutted in the interior bottom of end cap (13), the end face bearing
(15) radius is greater than the radius of the first mounting hole (16), and the outer end face of first mounting hole (16) forms the first confined planes
(18), mounting plate (19) are equipped in the mounting shell (1), the mounting plate (19) has the second mounting hole (20), the transmission
Axis (3) and the second mounting hole (20) are rotatablely connected, and second mounting hole (20) is equipped with limiting stand far from the side of end cap (13)
Rank (21), the transmission shaft (3) are equipped with positive stop lug boss (22)；When variable-ratio motor-driven jack zero load, the spring (14)
Elastic force push against end face bearing (15) and the first confined planes (18), transmission shaft (3) is in the first station；When variable-ratio electronic thousand
When jin top load, load pushes against positive stop lug boss (22) and limited step (21), and transmission shaft (3) is in second station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821317600.0U CN208684289U (en) | 2018-08-15 | 2018-08-15 | Variable-ratio motor-driven jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821317600.0U CN208684289U (en) | 2018-08-15 | 2018-08-15 | Variable-ratio motor-driven jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208684289U true CN208684289U (en) | 2019-04-02 |
Family
ID=65885611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821317600.0U Active CN208684289U (en) | 2018-08-15 | 2018-08-15 | Variable-ratio motor-driven jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208684289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109019393A (en) * | 2018-08-15 | 2018-12-18 | 杭州恒宏机械有限公司 | Variable-ratio motor-driven jack and its working method |
-
2018
- 2018-08-15 CN CN201821317600.0U patent/CN208684289U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109019393A (en) * | 2018-08-15 | 2018-12-18 | 杭州恒宏机械有限公司 | Variable-ratio motor-driven jack and its working method |
| CN109019393B (en) * | 2018-08-15 | 2020-03-31 | 杭州恒宏机械有限公司 | Variable-speed electric jack and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311232 red soil farm, Xiaoshan District, Zhejiang, Hangzhou Patentee after: Henghong Intelligent Equipment Co.,Ltd. Address before: 311232 red soil farm, Xiaoshan District, Zhejiang, Hangzhou Patentee before: HANGZHOU HENGHONG MACHINERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Variable speed electric jack Effective date of registration: 20220829 Granted publication date: 20190402 Pledgee: Zhejiang Xiaoshan Rural Commercial Bank Co.,Ltd. Zhejiang Free Trade Zone (Hangzhou) Hongshan Sub branch Pledgor: Henghong Intelligent Equipment Co.,Ltd. Registration number: Y2022330001932 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |