CN206940322U - Hydraulic jack - Google Patents
Hydraulic jack Download PDFInfo
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- CN206940322U CN206940322U CN201720698639.0U CN201720698639U CN206940322U CN 206940322 U CN206940322 U CN 206940322U CN 201720698639 U CN201720698639 U CN 201720698639U CN 206940322 U CN206940322 U CN 206940322U
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- self
- locking nut
- push rod
- hydraulic jack
- hydraulic
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Abstract
The utility model provides a kind of hydraulic jack, it includes push rod, oil cylinder and self-locking nut, the hydraulic jack also includes hydraulic motor and gear, the hydraulic motor is corresponded with the gear and set, the hydraulic motor is fixed on the top of the oil cylinder, the output shaft of each gear and corresponding hydraulic motor is connected in the gear, the outside wall surface of the self-locking nut includes the second threaded portion, second threaded portion of the self-locking nut is meshed with the gear, the push rod relative to the oil cylinder along the oil cylinder move axially downwards one apart from when, the bottom surface of the self-locking nut is resisted against the top of the oil cylinder.The hydraulic jack, by controlling the rotating speed of hydraulic motor, self-locking nut is set to be constantly in the position come close to or in contact with the top of oil cylinder, without manually carrying out regulation self-locking nut position manually at hydraulic lifting, potential safety hazard is reduced, and without operating space, can anywhere be used.
Description
Technical field
It the utility model is related to a kind of hydraulic jack.
Background technology
, will be by jacking thing when vertical lifting is constructed in existing work progress, hydraulic synchronization lifting is a kind of conventional
Construction method, traditional hydraulic synchronization lifting method realize that hydraulic jack passes through electricity using multiple hydraulic jacks
Magnet valve controls the hydraulic coupling of its oil cylinder, realizes the lifting of in-oil cylinder push rod.During synchronization of jacking up, by hydraulic pressure system
Hydraulic lock or balanced valve are installed to keep the push rod of multiple hydraulic jacks to keep synchronous in system.Although traditional synchronization of jacking up system
System can play security protection on hydraulic protecting, but if during the problems such as occurring booster in hydraulic system, letting out in oil cylinder, then
Hydraulic system decompression may be caused and push rod is lost hydraulic pressure holding power.In this case, weight of the push rod by load objects
And decline, the state of synchronization of jacking up is destroyed, causes potential safety hazard.
Therefore, on the basis of original hydraulic safe protection to jack, one of mechanical protection can also be increased.
As shown in figure 1, the outside wall surface of push rod 11 of hydraulic jack 1 sets one to rise the along the short transverse spiral shape of push rod 11
One threaded portion 111, hydraulic jack 1 also include a self-locking nut 13, and the center of the self-locking nut 13 has one and first spiral shell
The screwed hole (not shown) that line portion 111 is engaged, the self-locking nut 13 is arranged on push rod, passes through rotary self-locking nut
13, it can be made to be risen or fallen with respect to push rod 11.When losing hydraulic coupling suddenly in the oil cylinder 12 of hydraulic jack 1, push rod
11 can drive self-locking nut 13 to decline together, and during the top contact of self-locking nut 13 and oil cylinder 12, self-locking nut 13 can prevent to push up
Bar 11 continues to decline, and realizes mechanical self-latching.
But this structure actual use when, it is necessary to have operating personnel at Jacking point with push rod 11 lifting ceaselessly
Adjust position of the self-locking nut 13 with respect to push rod 11.If operating space is by prescribing a time limit at Jacking point, can not complete to adjust self-locking spiral shell
The work of mother 13.In addition, operating personnel be supported always object bottom work the security of job site can be brought it is hidden
Suffer from.
Utility model content
The technical problems to be solved in the utility model is to overcome hydraulic jack self-locking nut needs in the prior art
Manually adjusted manually at hydraulic lifting, potential safety hazard be present, and if without operating space at jacking, cause self-locking spiral shell
A kind of the defects of mother can not use, there is provided hydraulic jack.
The utility model is that solve above-mentioned technical problem by following technical proposals：
A kind of hydraulic jack, it includes push rod, oil cylinder and self-locking nut, and the outside wall surface of the push rod has one along described
The first threaded portion that push rod short transverse spiral shape rises, the center of the self-locking nut has a screwed hole, the self-locking spiral shell
First threaded portion of female screwed hole and the push rod coordinates, and the hydraulic jack is also including at least one hydraulic motor and extremely
A few gear, at least one hydraulic motor are corresponded with least one gear and set, at least one liquid
Pressure motor is fixed on the top of the oil cylinder, and each gear and corresponding hydraulic motor is defeated at least one gear
Shaft is connected, and the outside wall surface of the self-locking nut includes the second threaded portion, the second threaded portion of the self-locking nut and institute
State at least one gear to be meshed, a distance is moved axially downwards along the oil cylinder relative to the oil cylinder in the push rod
When, the bottom surface of the self-locking nut is resisted against the top of the oil cylinder.
By the rotating speed for controlling hydraulic motor, you can self-locking nut is being come close to or in contact with the position at the top of oil cylinder always,
When push rod loses hydraulic pressure holding power suddenly, bottom surface and the oil cylinder top contact of self-locking nut, make push rod will not be due to loaded article
The gravity of body and continuous decrease.
It is preferred that the oil cylinder includes cylinder body, support ring and flange seat, the support ring is fixed on the top of the cylinder body
Portion, the flange seat are fixed on the top of the support ring, and the center of the support ring and flange seat is respectively provided with through hole, the top
Bar sequentially passes through the through hole of the support ring and flange seat, and the hydraulic motor is fixed on the flange seat, the self-locking spiral shell
There is a gap between female bottom surface and the top surface of the flange seat；
The push rod relative to the oil cylinder along the oil cylinder move axially downwards one apart from when, the self-locking nut
Bottom surface be resisted against the top surface of the flange seat.
When the push rod of hydraulic jack is risen by the hydraulic control of hydraulic system, hydraulic motor keeps rotating forward, and
Band moving gear rotates together with self-locking nut.Wherein self-locking nut relative push rod of meeting while rotation moves downward, hydraulic pressure horse
When the rotating speed reached is sufficiently large, it is ensured that the bottom surface of self-locking nut is resisted against on the top surface of flange seat always, make self-locking nut with
The level height position of gear keeps constant.
It is preferred that the hydraulic jack also includes a baffle plate, the baffle plate setting in the top of the self-locking nut simultaneously
Fixed with the flange seat, there is a gap between the bottom surface of the top surface of the self-locking nut and the baffle plate；
The push rod relative to the oil cylinder along the oil cylinder move axially upwards one apart from when, the self-locking nut
Top surface be resisted against the bottom of the baffle plate.
When the push rod of hydraulic jack is declined by the hydraulic control of hydraulic system, hydraulic motor keeps reversion, and
Band moving gear rotates together with self-locking nut.Wherein self-locking nut relative push rod of meeting while rotation moves upwards, hydraulic pressure horse
When the rotating speed reached is sufficiently large, it is ensured that the top surface of self-locking nut is resisted against on the bottom surface of baffle plate always, makes self-locking nut and tooth
The level height position of wheel keeps constant.
It is preferred that the hydraulic jack also includes a case, the top of the case and the baffle plate is fixed, the cover
Shell is coated on the outside of the baffle plate, hydraulic motor, gear and self-locking nut, and the center of the case has a through hole, described
Push rod stretches out from the through hole of the case.
The case can effectively prevent the impurity of job site from entering the inside of hydraulic motor and gear, and can also prevent
Only Field Force contacts hydraulic motor and gear in rotation status by mistake, causes the accident.
It is preferred that gap and the self-locking nut between the top surface of the bottom surface of the self-locking nut and the flange seat
Gap sum between the bottom surface of top surface and the baffle plate is 1-3mm.
The moment of torsion of hydraulic motor makes self-locking nut be driven and the caused pressure about several tons of weights that move up and down, should
Less gap is it is possible to prevente effectively from the caused occlusion due to the entrance of debris between self-locking nut and threaded guide rod.
It is preferred that gap and the self-locking nut between the top surface of the bottom surface of the self-locking nut and the flange seat
Gap sum between the bottom surface of top surface and the baffle plate is 2mm.
It is preferred that the hydraulic jack also includes at least one proximity switch, at least one proximity switch is set
In on the flange seat, the proximity switch is used for the distance for detecting the relatively described flange seat of the self-locking nut.
It is preferred that characterized in that, at least one hydraulic motor includes two hydraulic motors, at least one tooth
Wheel includes two gears, and circumferential uniform intervals of two hydraulic motors along the flange seat are set, two gear edges
The circumferential uniform intervals of the self-locking nut are set.
This mode that two identical hydraulic motors and gear are set in the both sides of self-locking nut, can be by both sides
Hydraulic motor give the pressure of self-locking nut and cancel each other, reduce self-locking nut and what push rod was subject to come from hydraulic motor and tooth
The side force of wheel, lift the service life of hydraulic jack.
It is preferred that the oil cylinder also includes hoisting ring, the hoisting ring is arranged in the side wall of the cylinder body.
The hoisting ring is used for when lifting by crane hydraulic jack as fixed interface.
It is preferred that stating hydraulic jack also includes saddle, the top of the push rod is a plane, and the saddle is flexibly connected
In plane at the top of the push rod, the activity point of view of the plane at the top of the relatively described push rod of the saddle is 5 °.
Top lift caused by push rod can be transferred on load objects by saddle, when the bottom surface of load objects is with respect to push rod top
The plane in portion and it is non-horizontal when, the saddle can protect saddle and load objects with respect to most 5 ° of plane deflection at the top of push rod
Maintain an equal level row, and in surface contact state, effectively the top lift of hydraulic jack is transferred on load objects.
Positive effect of the present utility model is：The hydraulic jack, by controlling the rotating speed of hydraulic motor, make certainly
Split nut is constantly in the position come close to or in contact with the top of oil cylinder, without manually carrying out regulation self-locking spiral shell manually at hydraulic lifting
Female position, potential safety hazard is reduced, and without operating space, can anywhere used.
Brief description of the drawings
Fig. 1 is the structural representation of the hydraulic jack of prior art.
Fig. 2 is the internal structure schematic diagram of the hydraulic jack of the utility model embodiment 1.
Fig. 3 is that the hydraulic jack of the utility model embodiment 1 removes the structural representation after case.
Fig. 4 is the internal structure schematic diagram of the hydraulic jack of the utility model embodiment 2.
Description of reference numerals：
Hydraulic jack 1
Push rod 11, the first threaded portion 111
Oil cylinder 12, cylinder body 121, support ring 122, flange seat 123, hoisting ring 124, hydraulic joint 125
Self-locking nut 13, the second threaded portion 131
Hydraulic motor 14
Gear 15
Baffle plate 16
Case 17
Proximity switch 18
Saddle 19
Embodiment
The utility model is further illustrated below by the mode of embodiment, but is not therefore limited in the utility model
Among described scope of embodiments.
Embodiment 1
As shown in Figures 2 and 3, the utility model provides a kind of hydraulic jack 1, it include push rod 11, oil cylinder 12, from
Split nut 13, hydraulic motor 14 and gear 15.The outside wall surface of push rod 11 sets one to rise first along the short transverse spiral shape of push rod 11
Threaded portion 111, the center of self-locking nut 13 have a screwed hole (not shown) engaged with first threaded portion 111, lead to
Rotation self-locking nut 13 is crossed, it can be made to be risen or fallen with respect to push rod 11.
The oil cylinder 12 of hydraulic jack 1 also includes cylinder body 121, support ring 122 and flange seat 123.Support ring 122 is fixed on
The top of cylinder body 121, flange seat 123 are fixed on the top of support ring 122, and the center of support ring 122 and flange seat 123 is respectively provided with
Through hole, the push rod 11 of hydraulic jack 1 pass through from the two through holes.
Hydraulic motor 14 is fixed on flange seat 123, and the output shaft of gear 15 and hydraulic motor 14 is connected.Hydraulic pressure thousand
The outside wall surface of self-locking nut 13 on jin top 1 includes the second threaded portion 131, and second threaded portion 131 is meshed with gear 15.Hydraulic pressure horse
When being rotated up to 14, by gear 15 self-locking nut 13 can be driven to rotate, and by the rotation of self-locking nut 13, make self-locking nut
13 short transverse with respect to push rod 11 on push rod 11 moves up and down, self-locking nut 13 can Continued downward motion until self-locking spiral shell
The bottom surface of mother 13 is resisted against the top surface of flange seat 123 and stopped.
By the rotating speed for controlling hydraulic motor 14, you can be constantly in self-locking nut 13 and come close to or in contact with flange seat 123
Position.When push rod 11 loses hydraulic pressure holding power suddenly, the bottom surface of self-locking nut 13 contacts with the top surface of flange seat 123, makes
Push rod 11 will not due to load objects gravity and continuous decrease.
Hydraulic jack 1 also includes a baffle plate 16, and baffle plate 16 is arranged at the top of self-locking nut 13 and consolidated with flange seat 123
Fixed connection, self-locking nut 13 can continue upward along push rod 11 moves the bottom until the top surface of self-locking nut 13 is resisted against baffle plate 16
Face and stop.
The space of self-locking nut 13 is restricted between flange seat 123 and baffle plate 16, makes self-locking nut 13 and gear
15 level height position keeps constant, and one co-exists between 1-3mm between the self-locking nut 13 and flange seat 123 and baffle plate 16
Gap, it is preferable that the value in the gap is 2mm.The moment of torsion of hydraulic motor 14 produces when self-locking nut 13 is moved up and down being driven
Raw pressure about several tons of weights, the less gap is it is possible to prevente effectively from due to debris between self-locking nut 13 and threaded guide rod
Entrance and caused occlusion.
Hydraulic jack 1 also includes a case 17, and the top of the case 17 and baffle plate 16 is fixed, and the case 17 is coated on gear
Plate 16, hydraulic motor 14, the outside of gear 15 and self-locking nut 13, the center of the case 17 have a through hole, and push rod 11 is from cover
Stretched out in the through hole of shell 17.The case 17 can effectively prevent the impurity of job site from entering hydraulic motor 14 and gear 15
Inside, and contact hydraulic motor 14 and gear 15 in rotation status by mistake prevented also from Field Force, cause the accident.
Hydraulic jack 1 also includes proximity switch 18, and proximity switch 18 is arranged on flange seat 123, for detecting self-locking
Distance of the nut 13 with respect to flange seat 123.
Hydraulic jack 1 also includes a saddle 19, and saddle 19 is arranged at in the plane at the top of push rod 11, being pushed up with push rod 11
The two-dimensional activity connection in portion, the saddle 19 are 5 ° with respect to the activity point of view of the plane at the top of push rod 11.Saddle 19 can be by push rod
Top lift caused by 11 is transferred on load objects (not identified in figure), is pushed up when the bottom surface of load objects (not identified in figure) is relative
The plane at the top of bar 11 and it is non-horizontal when, the plane that the saddle 19 is capable of the relative top of push rod 11 deflect most 5 °, make saddle 19
Keeping parallelism (is not identified) in figure with load objects, in surface contact state, effectively by the top lift transmission of hydraulic jack 1
To load objects (not identified in figure).
The oil cylinder 12 of hydraulic jack 1 also includes hoisting ring 124 and two hydraulic joints 125.Hoisting ring 124 is arranged at cylinder
In the side wall of body 121.The hoisting ring 124 is used for when lifting by crane hydraulic jack 1 as fixed interface.Two hydraulic joints 125
The both sides up and down of the lateral wall of cylinder body 121 are distributed in respectively and are connected with the inside of cylinder body 121, for hydraulic system (not to be marked in figure
Know) hydraulic coupling be transferred in cylinder body 121.
When the push rod 11 of hydraulic jack 1 is risen by hydraulic control, hydraulic motor 14 keeps rotating forward, and with moving teeth
Wheel 15 rotates together with self-locking nut 13.The wherein relative push rod 11 of meeting while rotation of self-locking nut 13 moves downward, when certainly
The speed that split nut 13 moves downward be more than push rod 11 rise speed when, it is ensured that the bottom surface of self-locking nut 13 always against
In on the top surface of flange seat 123, load weight is transferred on push rod 11 by saddle 19, and hydraulic pressure is transferred to eventually through oil cylinder 12
In system (not identified in figure).When hydraulic system (not identified in figure) breaks down during decompression, self-locking nut 13 can be kept
Mechanical self-latching, push rod 11 is not declined, and load weight is transferred to flange seat 123 and most by the bottom surface of self-locking nut 13
It is transferred to eventually on cylinder body 121.
When the push rod 11 of hydraulic jack 1 is declined by hydraulic control, hydraulic motor 14 keeps reversion, and with moving teeth
Wheel 15 rotates together with self-locking nut 13.The wherein relative push rod 11 of meeting while rotation of self-locking nut 13 moves upwards, when certainly
The speed that split nut 13 moves upwards be more than push rod 11 decline speed when, it is ensured that the top surface of self-locking nut 13 always against
In on the bottom surface of baffle plate 16, load weight is transferred on push rod 11 by saddle 19, and hydraulic pressure system is transferred to eventually through oil cylinder 12
Unite (not identified in figure).When hydraulic system (not identified in figure) breaks down during decompression, push rod 11 starts free-falling, instantly
When dropping down onto the bottom surface of self-locking nut 13 and being contacted with the top surface of flange seat 123, self-locking nut 13 can keep mechanical self-latching, make push rod
11 no longer decline, and load weight is transferred into flange seat 123 by the bottom surface of self-locking nut 13 and is finally transmitted to cylinder body 121
On.
Embodiment 2
As shown in figure 4, the structure of hydraulic jack 1 of the embodiment is substantially the same manner as Example 1, difference is：Liquid
Pressure jack 1 includes two hydraulic motors 14 and two gears 15, and circumference of the two hydraulic motors 14 along flange seat 123 is
Even interval setting, circumferential uniform intervals of the two gears 15 along self-locking nut 13 are set.Relatively in the side of self-locking nut 13
The scheme of hydraulic motor 14 is set, two identical hydraulic motors 14 and gear 15 are set in the both sides of self-locking nut 13,
The pressure that the hydraulic motor 14 of both sides can be given to self-locking nut 13 cancels each other, reduce self-locking nut 13 and push rod 11 by
The side force from hydraulic motor 14 Yu gear 15, lifted hydraulic jack 1 service life.
Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
This is merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
On the premise of without departing substantially from principle of the present utility model and essence, various changes or modifications can be made to these embodiments,
But these changes and modification each fall within the scope of protection of the utility model.
Claims (10)
1. a kind of hydraulic jack, it includes push rod, oil cylinder and self-locking nut, and the outside wall surface of the push rod has one along the top
The first threaded portion that bar short transverse spiral shape rises, the center of the self-locking nut has a screwed hole, the self-locking nut
The first threaded portion of screwed hole and the push rod coordinate, it is characterised in that the hydraulic jack also includes at least one liquid
Pressure motor and at least one gear, at least one hydraulic motor is corresponded with least one gear and set, described
At least one hydraulic motor is fixed on the top of the oil cylinder, each gear and corresponding liquid at least one gear
The output shaft drive connection of pressure motor, the outside wall surface of the self-locking nut include the second threaded portion, and the second of the self-locking nut
Threaded portion is meshed with least one gear, in the push rod relative to axially downwardly shifting of the oil cylinder along the oil cylinder
Dynamic one apart from when, the bottom surface of the self-locking nut is resisted against the top of the oil cylinder.
2. hydraulic jack as claimed in claim 1, it is characterised in that the oil cylinder includes cylinder body, support ring and flange seat,
The support ring is fixed on the top of the cylinder body, and the flange seat is fixed on the top of the support ring, the support ring and
The center of flange seat is respectively provided with through hole, and the push rod sequentially passes through the through hole of the support ring and flange seat, the hydraulic motor
It is fixed on the flange seat, there is a gap between the top surface of the bottom surface of the self-locking nut and the flange seat；
The push rod relative to the oil cylinder along the oil cylinder move axially downwards one apart from when, the bottom of the self-locking nut
Face is resisted against the top surface of the flange seat.
3. hydraulic jack as claimed in claim 2, it is characterised in that the hydraulic jack also includes a baffle plate, described
Baffle plate setting is fixed in the top of the self-locking nut and with the flange seat, the top surface of the self-locking nut and the baffle plate
There is a gap between bottom surface；
The push rod relative to the oil cylinder along the oil cylinder move axially upwards one apart from when, the top of the self-locking nut
Face is resisted against the bottom of the baffle plate.
4. hydraulic jack as claimed in claim 3, it is characterised in that the hydraulic jack also includes a case, described
The top of case and the baffle plate is fixed, and the case is coated on the outer of the baffle plate, hydraulic motor, gear and self-locking nut
Portion, the center of the case have a through hole, and the push rod stretches out from the through hole of the case.
5. hydraulic jack as claimed in claim 3, it is characterised in that the bottom surface of the self-locking nut and the flange seat
The gap sum between the top surface in gap and the self-locking nut and the bottom surface of the baffle plate between top surface is 1-3mm.
6. hydraulic jack as claimed in claim 5, it is characterised in that the bottom surface of the self-locking nut and the flange seat
The gap sum between the top surface in gap and the self-locking nut and the bottom surface of the baffle plate between top surface is 2mm.
7. hydraulic jack as claimed in claim 3, it is characterised in that the hydraulic jack also includes at least one close
Switch, at least one proximity switch are arranged on the flange seat, and the proximity switch is used to detect the self-locking nut
The distance of relatively described flange seat.
8. the hydraulic jack as described in any one in claim 2 to 7, it is characterised in that at least one hydraulic pressure horse
Up to including two hydraulic motors, at least one gear includes two gears, and two hydraulic motors are along the flange seat
Circumferential uniform intervals set, circumferential uniform intervals of two gears along the self-locking nut are set.
9. the hydraulic jack as described in any one in claim 2 to 7, it is characterised in that the oil cylinder is also comprising lifting
Ring, the hoisting ring are arranged in the side wall of the cylinder body.
10. hydraulic jack as claimed in any of claims 1 to 7 in one of claims, it is characterised in that state hydraulic jack and also include
Saddle, the top of the push rod is a plane, and the saddle is movably connected in the plane at the top of the push rod, the saddle phase
Activity point of view to the plane at the top of the push rod is 5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720698639.0U CN206940322U (en) | 2017-06-15 | 2017-06-15 | Hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720698639.0U CN206940322U (en) | 2017-06-15 | 2017-06-15 | Hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206940322U true CN206940322U (en) | 2018-01-30 |
Family
ID=61365396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720698639.0U Active CN206940322U (en) | 2017-06-15 | 2017-06-15 | Hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206940322U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108584830A (en) * | 2018-05-14 | 2018-09-28 | 长江三峡通航管理局 | A kind of hydraulic jack and control method with mechanical self-latching protective device |
| CN108626200A (en) * | 2018-06-25 | 2018-10-09 | 穆钜（上海）动力技术有限公司 | It can mechanical trailing type oil cylinder |
| CN111196577A (en) * | 2020-02-21 | 2020-05-26 | 中国五冶集团有限公司 | Anti-falling limiting jack for positioning magnetic suspension track beam |
-
2017
- 2017-06-15 CN CN201720698639.0U patent/CN206940322U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108584830A (en) * | 2018-05-14 | 2018-09-28 | 长江三峡通航管理局 | A kind of hydraulic jack and control method with mechanical self-latching protective device |
| CN108626200A (en) * | 2018-06-25 | 2018-10-09 | 穆钜（上海）动力技术有限公司 | It can mechanical trailing type oil cylinder |
| CN108626200B (en) * | 2018-06-25 | 2024-04-05 | 穆钜（上海）动力技术有限公司 | Mechanically following type oil cylinder |
| CN111196577A (en) * | 2020-02-21 | 2020-05-26 | 中国五冶集团有限公司 | Anti-falling limiting jack for positioning magnetic suspension track beam |
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