CN111847296A - Rollover-prevention screw jack - Google Patents
Rollover-prevention screw jack Download PDFInfo
- Publication number
- CN111847296A CN111847296A CN202010600518.4A CN202010600518A CN111847296A CN 111847296 A CN111847296 A CN 111847296A CN 202010600518 A CN202010600518 A CN 202010600518A CN 111847296 A CN111847296 A CN 111847296A
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- CN
- China
- Prior art keywords
- base
- rollover
- arms
- screw jack
- supporting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
- B66F3/12—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated comprising toggle levers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F2700/00—Lifting apparatus
- B66F2700/04—Jacks with screw and nut
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to the technical field of jacks, and particularly relates to a rollover-prevention screw jack, which comprises: the lifting jack comprises a top seat, a base, a screw rod, a locking nut, a supporting arm and an auxiliary arm, wherein the supporting arm and the auxiliary arm are uniformly distributed and installed between the top seat and the base along the circumference, a side turning prevention device is further arranged below the base and comprises a base, the base is provided with a supporting rod which is clamped on the lower supporting arm and the lower auxiliary arm through up-down swinging, the supporting rod has an auxiliary supporting effect, and a synchronous mechanism which drives the supporting mechanism to swing synchronously is arranged on the base, so that the lifting jack is supported by the supporting rod under the condition that the ground is uneven, the stress is more uniform, and the lifting jack is prevented from.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of jacks, and particularly relates to an anti-rollover screw jack.
[ background of the invention ]
The stress surface of the base of the existing screw jack is usually very small, the existing screw jack is easy to damage a normal road surface, and meanwhile, the existing screw jack has supporting force in one direction when being used, has poor structural stability, and is easy to tilt or even turn over due to shaking caused by uneven stress in places with uneven ground, thereby causing safety failure.
[ summary of the invention ]
The invention provides a rollover-prevention screw jack, and aims to solve the problems that the existing screw jack is damaged on a road surface due to too small stress surface of a base, and inclines and even rolls over due to shaking caused by uneven stress.
The invention is realized by the following technical scheme:
an anti-rollover screw jack comprising:
a top seat;
a base;
a support arm including a pair of upper support arms and a pair of lower support arms, the upper support arms being connected to the lower support arms by hinge shafts;
the screw rod is fixedly but rotatably arranged between the two articulated shafts in a penetrating way;
the locking nut is arranged on the screw rod and is provided with a threaded surface matched with the screw rod;
prevent turning on one's side screw jack still includes:
the auxiliary arms comprise a pair of upper auxiliary arms and a pair of lower auxiliary arms, the upper auxiliary arms are hinged with one ends of the corresponding lower auxiliary arms, the two upper supporting arms and the two upper auxiliary arms are uniformly distributed and installed on the top seat along the circumference, the two lower supporting arms and the two lower auxiliary arms are uniformly distributed and installed on the base along the circumference, and clamping parts are arranged on one sides of the lower supporting arms and the lower auxiliary arms facing the base;
The base below is equipped with the connecting piece, the connecting piece below is connected with prevents the device of turning on one's side, prevent the device of turning on one's side including the base, be equipped with a plurality ofly on the base relative with joint portion position and can with joint portion complex bracing piece, still be equipped with the lazytongs that drives the bracing piece synchronization action on the base.
As the four support rods are uniformly distributed along the circumference and hinged on the base, the support rods can swing towards the direction of the clamping part along the hinged positions.
As the anti-rollover screw jack is characterized in that the clamping portion is a serrated clamping strip with a plurality of clamping positions, and the supporting rod swings up and down according to the distance between the top seat and the base and is clamped on different clamping positions of the serrated clamping strip.
As mentioned above, the synchronization mechanism includes a rotary table disposed at the center of the base, four first connecting rods are uniformly distributed on the rotary table and can swing around the axis of the rotary table, the other ends of the four first connecting rods are connected with sliding blocks capable of moving along the radial direction of the rotary table, the other ends of the four sliding blocks are hinged with second connecting rods, and the other ends of the second connecting rods are hinged with corresponding supporting rods, so that the supporting rods are driven to swing through the second connecting rods when the sliding blocks move along the radial direction.
As the rollover-prevention screw jack, the first connecting rod is arc-shaped.
As the rollover-prevention screw jack, the rubber block is arranged at one end of the support rod which is clamped with the clamping part.
As mentioned above, the base of the anti-rollover screw jack is provided with a turntable groove for the turntable to rotate and mount, and the base is further provided with four sliding long grooves which are radially arranged and for the sliding block to slide and mount.
As above anti-rollover screw jack, the connecting piece includes disc portion, disc portion one side is connected with the base, week side edge circumference evenly distributed of disc portion opposite side has four connecting blocks, the connecting block with pedestal connection, just by between disc portion and the base the connecting block is separated and is formed the cavity that supplies the device motion of preventing rolling over, disc portion week side still sets up four and corresponds and supplies the groove of stepping down that the bracing piece swing passed with the bracing piece position.
According to the rollover-prevention screw jack, the four hinged parts are uniformly distributed on the base along the circumference, and the hinged parts are provided with hinged holes for the lower supporting arm and the lower auxiliary arm to be hinged on the base.
As the rollover-prevention screw jack, the lower surface of the base is provided with the rubber anti-slip layer.
Compared with the prior art, the invention has the following advantages:
1. the invention provides an anti-rollover screw jack, wherein supporting arms and auxiliary arms which are uniformly distributed and arranged on a top seat and a base along the circumference are arranged between the top seat and the base, an anti-rollover device is arranged under the base and comprises a base, a supporting rod with an auxiliary supporting function is arranged on the base and is clamped on a lower supporting arm and a lower auxiliary arm in an up-and-down swinging manner, so that the jack is supported by the supporting rod in an auxiliary manner under the condition of uneven ground, the stress is more uniform, the jack is prevented from tilting or even rollover due to shaking in use, a synchronous mechanism for driving the supporting rod to synchronously swing is also arranged on the anti-rollover device, the supporting rod is synchronously swung and clamped on different clamping positions of the lower supporting arm and the lower auxiliary arm, the swinging height and the swinging angle are consistent, and the stress is more uniform.
2. According to the invention, the rubber anti-slip layer is arranged on the lower surface of the base, so that the stability of the jack can be improved, and accidents caused by sliding can be avoided.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is a top view of the rollover prevention device of the present invention;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 7 is a top view of the base of the present invention.
[ detailed description ] embodiments
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the words are used for distinguishing between them unless the context clearly dictates otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An anti-rollover screw jack as shown in fig. 1-7, comprising:
a top seat 1;
a base 2;
a support arm 3 including a pair of upper support arms 31 and a pair of lower support arms 32, the upper support arms 31 being connected to the lower support arms 32 through hinge shafts 4;
a screw rod 12 which is fixedly but rotatably arranged between the two articulated shafts 4 in a penetrating way;
a lock nut 13 provided on the lead screw 12 and having a threaded surface cooperating with the lead screw 12;
prevent turning on one's side screw jack still includes:
the auxiliary arm 5 comprises a pair of upper auxiliary arms 51 and a pair of lower auxiliary arms 52, the upper auxiliary arms 51 are hinged with one ends of the corresponding lower auxiliary arms 52, the two upper supporting arms 31 and the two upper auxiliary arms 51 are uniformly distributed and installed on the top seat 1 along the circumference, the two lower supporting arms 32 and the two lower auxiliary arms 52 are uniformly distributed and installed on the base 2 along the circumference, and the clamping parts 6 are arranged on one sides of the lower supporting arms 32 and the lower auxiliary arms 52 facing the base 2;
Specifically, the number of the supporting rods 82 is four, the supporting rods 82 are evenly distributed along the circumference and hinged on the base 81, so that the supporting rods 82 can synchronously swing towards the direction of the clamping portion 6 along the hinged position. When the jack is used in a place with uneven ground, the support rods 821 respectively support the two corresponding lower support arms 32 and the two corresponding lower auxiliary arms 52, so that the jack is uniformly stressed, and the jack is prevented from shaking during operation to cause the jack to tilt and turn over.
More specifically, the clamping portion 6 is a saw-toothed clamping strip with a plurality of clamping positions, and the supporting rod 82 swings up and down according to the distance between the top seat 1 and the base 2 and is clamped on different clamping positions of the saw-toothed clamping strip. The distance between the top seat 1 and the base 2 is adjusted through the screw rod 12, the supporting rod 82 can swing up and down to be matched with a clamping position on the sawtooth-shaped clamping strip according to the optimal stress point, so that the stress is more stable, and different height flexible adjustment is promoted according to different terrains.
In addition, the synchronizing mechanism 83 includes a rotating disc 831 disposed at the center of the base 81, four first connecting rods 832 capable of swinging around the axis of the rotating disc 831 are uniformly distributed on the rotating disc 831, the other ends of the four first connecting rods 832 are connected with sliders 833 capable of moving along the radial direction of the rotating disc 831, the other ends of the four sliders 833 are hinged with second connecting rods 834, the other ends of the second connecting rods 834 are hinged with the corresponding supporting rods 82, so that the supporting rods 82 are driven to swing through the second connecting rods 834 when the sliders 833 move along the radial direction. Through one of them bracing piece 82 of swing, can drive the slider 833 motion that links to each other with it through second connecting rod 834, and then drive the swing of the head rod 832 that links to each other with this slider 833 and promote carousel 831, and in the same way, the rotation of carousel 831 then can drive other three bracing pieces 82 and swing in step, and wobbling height and swing angle are unanimous, not only make the atress more even, and it is more convenient during the use moreover.
Further, the first connecting rod 832 is arc-shaped. The four first connecting rods 832 can swing without interference, and synchronous swinging folding is realized.
Still further, the supporting rod 82 is provided with a rubber block 9 at one end clamped with the clamping part 6. The friction force between the support rod 821 and the clamping part 6 is increased, and the damage of the support rod to the clamping part 6 is prevented.
In addition, the base 81 is provided with a turntable groove 811 for rotatably mounting the turntable 831, and the base 81 is further provided with four sliding long grooves 812 which are radially arranged and for slidably mounting the sliding block 833. The turntable 811 and the slider 833 can move flexibly on the base 81, and the occupied space of the turntable 811 and the slider 833 is reduced.
Specifically, the connecting piece 7 includes disc portion 71, disc portion 71 one side is connected with base 2, week side edge circumference evenly distributed of disc portion 71 opposite side has four connecting blocks 72, connecting block 72 with base 81 is connected, just by between disc portion 71 and the base 81 connecting block 72 is separated and is formed the cavity 10 that supplies the motion of device 8 of preventing turning on one's side, disc portion 71 week side still sets up four and corresponds and supplies the groove 711 that gives way that the bracing piece 82 swung and pass with bracing piece 82 position. The cavity 10 not only provides a space for the rollover prevention device 8 to move, but also the relief groove 711 allows the support rod to pass through the connecting member and be received in the cavity 10.
More specifically, four hinge portions 21 are uniformly distributed on the base 2 along the circumference, and hinge holes 22 for the lower support arm 32 and the lower auxiliary arm 52 to hinge on the base 2 are formed in the hinge portions 21. The lower support arm 32 and the lower auxiliary arm 52 are hingedly mounted on the hinge portion 21 of the base 2.
Finally, the lower surface of the base 81 is provided with a rubber anti-slip layer 11. The friction force between the base 81 and the ground is increased, the stability of the jack in the super-lifting process is improved, and the sliding is avoided to cause accidents.
When the normal screw jack is used, the rotating handle on the rotating screw rod drives the screw rod to rotate, the supporting arm moves under the action of positive and negative teeth, so that the distance between the top seat and the base is adjusted, and the supporting arm and the auxiliary arm are uniformly distributed and installed on the top seat and the base along the circumference under the condition of uneven ground and are inclined or even turned over due to uneven stress, the anti-rollover device comprises a base, the base is provided with a supporting rod with an auxiliary supporting function, the supporting rod is supported by the supporting rod in the condition of uneven ground, the stress is more uniform, and the jack is prevented from being inclined or even turned over due to shaking in use, meanwhile, a synchronizing mechanism for driving the supporting rod to synchronously swing is further arranged on the side-turning prevention device, so that the supporting rod is synchronously swung and clamped on different clamping positions of the lower supporting arm and the lower auxiliary arm, the swinging height and the swinging angle are consistent, and the stress is more uniform.
The foregoing is illustrative of one embodiment provided in connection with the detailed description and is not intended to limit the invention to the specific embodiment described. Similar or identical methods, structures and the like as those of the present invention or several technical deductions or substitutions made on the premise of the conception of the present invention should be considered as the protection scope of the present invention.
Claims (10)
1. An anti-rollover screw jack comprising:
a top seat (1);
a base (2);
a support arm (3) comprising a pair of upper support arms (31) and a pair of lower support arms (32), said upper support arms (31) being connected by means of a hinge shaft (4) in correspondence of the lower support arms (32);
the screw rod (12) is fixedly and rotatably arranged between the two articulated shafts (4) in a penetrating way;
a lock nut (13) provided on the screw (12) and having a threaded surface cooperating with the screw (12);
its characterized in that, prevent screw jack of turning on one's side still includes:
the auxiliary arm (5) comprises a pair of upper auxiliary arms (51) and a pair of lower auxiliary arms (52), the upper auxiliary arms (51) are hinged with one ends of the corresponding lower auxiliary arms (52), the two upper supporting arms (31) and the two upper auxiliary arms (51) are uniformly distributed and installed on the top seat (1) along the circumference, the two lower supporting arms (32) and the two lower auxiliary arms (52) are uniformly distributed and installed on the base (2) along the circumference, and clamping parts (6) are arranged on one sides, facing the base (2), of the lower supporting arms (32) and the lower auxiliary arms (52);
Base (2) below is equipped with connecting piece (7), connecting piece (7) below is connected with prevents device (8) of turning on one's side, prevent that device (8) of turning on one's side includes base (81), be equipped with on base (81) a plurality ofly relative with joint portion (6) position and can with joint portion (6) complex bracing piece (82), still be equipped with on base (81) and drive lazytongs (83) of bracing piece (82) synchronization action.
2. The rollover-prevention screw jack according to claim 1, wherein the number of the support rods (82) is four, and the four support rods (82) are uniformly distributed along the circumference and hinged on the base (81), so that the support rods (82) can swing towards the clamping portion (6) along the hinged position.
3. The rollover-prevention screw jack according to claim 2, wherein the clamping portion (6) is a saw-toothed clamping strip with a plurality of clamping positions, and the support rod (82) swings up and down according to the distance between the top base (1) and the base (2) to be clamped on different clamping positions of the saw-toothed clamping strip.
4. The anti-rollover screw jack according to claim 3, wherein the synchronizing mechanism (83) comprises a turntable (831) arranged at the center of the base (81), four first connecting rods (832) capable of swinging around the axis of the turntable (831) are uniformly distributed on the turntable (831), the other ends of the four first connecting rods (832) are connected with sliders (833) capable of moving radially along the turntable (831), the other ends of the four sliders (833) are hinged with second connecting rods (834), and the other ends of the second connecting rods (834) are hinged with corresponding supporting rods (82), so that when the sliders (833) move radially, the supporting rods (82) are driven to swing through the second connecting rods (834).
5. The rollover-prevention screw jack as set forth in claim 4, wherein said first connecting rod (832) is arcuate.
6. The rollover-prevention screw jack as set forth in claim 5, wherein the end of the support rod (82) which is clamped with the clamping portion (6) is provided with a rubber block (9).
7. The anti-rollover screw jack according to claim 4, wherein the base (81) is provided with a turntable groove (811) for rotatably mounting the turntable (831), and the base (81) is further provided with four sliding slots (812) which are radially arranged and for slidably mounting the sliding block (833).
8. The anti-rollover screw jack according to claim 1, wherein the connecting piece (7) comprises a disc portion (71), one side of the disc portion (71) is connected with the base (2), four connecting blocks (72) are uniformly distributed on the other side of the disc portion (71) along the circumference, the connecting blocks (72) are connected with the base (81), the disc portion (71) and the base (81) are separated by the connecting blocks (72) to form the cavity (10) for the anti-rollover device (8) to move, and four yielding grooves (711) corresponding to the positions of the supporting rods (82) and allowing the supporting rods (82) to swing and pass are further formed on the circumferential side of the disc portion (71).
9. The rollover-prevention screw jack according to claim 1, wherein four hinge portions (21) are uniformly distributed on the base (2) along the circumference, and hinge holes (22) for the lower support arm (32) and the lower auxiliary arm (52) to hinge on the base (2) are formed in the hinge portions (21).
10. The rollover-prevention screw jack as set forth in claim 1, wherein the lower surface of the base (81) is provided with a rubber anti-slip layer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010600518.4A CN111847296B (en) | 2020-06-28 | 2020-06-28 | Rollover-prevention screw jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010600518.4A CN111847296B (en) | 2020-06-28 | 2020-06-28 | Rollover-prevention screw jack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111847296A true CN111847296A (en) | 2020-10-30 |
| CN111847296B CN111847296B (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010600518.4A Active CN111847296B (en) | 2020-06-28 | 2020-06-28 | Rollover-prevention screw jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111847296B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112723260A (en) * | 2020-12-23 | 2021-04-30 | 侯艳权 | Lifting device for be used for maintenance transformer |
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| US20200039801A1 (en) * | 2018-08-06 | 2020-02-06 | Miro Industries, Inc. | Support |
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| CN102328888A (en) * | 2011-09-15 | 2012-01-25 | 莱芜钢铁集团有限公司 | Hydraulic servo synchronous lifting device and control method thereof |
| CN202689499U (en) * | 2012-08-06 | 2013-01-23 | 中冶建工集团有限公司 | Guide rail rack used on scaffold anti-dropping anti-inclining lifting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112723260A (en) * | 2020-12-23 | 2021-04-30 | 侯艳权 | Lifting device for be used for maintenance transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111847296B (en) | 2021-12-14 |
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