CN211056594U - Horizontal hydraulic jack capable of preventing sudden drop - Google Patents

Abstract

The utility model discloses a can prevent horizontal hydraulic jack who suddenly falls, the on-line screen storage device comprises a base, the arm of lifting, traction frame and hydro-cylinder and safety gear, safety gear includes the drag hook, hook seat and unblock pole, the drag hook includes two drag hook arms and drag hook pole, two drag hook arms are side by side and but one end traction block pivoted separately cup joints on the traction block relatively, the drag hook pole violently establishes between another tip of two drag hook arms, the hook seat is fixed on the base and is located lifting arm lift in-process drag hook pole and is close to or keeps away from on the removal route of hydro-cylinder, on the removal direction that the hydro-cylinder was close to or kept away from to the drag hook pole, the hook seat was kept away from and is equipped with a hook groove on the side of hydro-cylinder. The utility model discloses, the wholeness of drag hook is strong, and sound construction lifts the arm and goes up the heavy object and suddenly fall when heavier, and it still can act on, can not receive big effort influence and warp, and because the horizontal drag hook pole width broad between two drag hook arms, its hook groove dislocation because of drag hook pole and hook seat can not appear, can't hook, the phenomenon that ends to stop.

Description

Horizontal hydraulic jack capable of preventing sudden drop

Technical Field

The utility model relates to a hydraulic pressure hoisting tool technical field especially relates to a can prevent horizontal hydraulic jack who suddenly falls.

Background

The horizontal hydraulic jack is used as light and small hoisting equipment and is widely applied to the field of automobile repair. A horizontal hydraulic jack popular in the market, as described in the patent document with chinese patent application No. 201210072632.X, generally includes a base, a lifting arm hinged to the base, a traction frame and an oil cylinder, wherein one end of the traction frame is connected to the lifting arm, and the other end is connected to a piston rod of the oil cylinder, and when the horizontal hydraulic jack works, the piston rod of the oil cylinder acts to sequentially drive the traction frame and the lifting arm, so that the lifting arm performs a corresponding action, specifically, the piston rod of the oil cylinder extends out, and the lifting arm is lifted; the piston rod of the oil cylinder retracts, and the lifting arm descends. The action of a lifting arm and the maintenance of the position of the lifting arm after the action of the horizontal hydraulic jack are completely realized by the oil pressure of an oil cylinder, however, after the jack works for a long time, the sealing performance of the oil cylinder is poor, high-pressure oil is easy to leak, a jacking mechanism suddenly falls back, or other heavy objects fall down under the unintentional condition after being lifted, and great risks are brought to the personal safety of operators.

Disclosure of Invention

An object of the utility model is to provide a can prevent horizontal hydraulic jack who suddenly falls.

Realize the utility model discloses the technical scheme of purpose is: a horizontal hydraulic jack capable of preventing sudden drop comprises a base, a lifting arm, a traction frame and an oil cylinder, wherein the lifting arm is hinged to the base, the traction frame comprises two traction arms and a traction block, the two traction arms are arranged side by side, one end of each traction arm is hinged to the base of the lifting arm, the traction block is transversely arranged in the middle of the other end of each traction arm, the two traction arms can be sleeved on the traction block in a rotating mode relative to the traction block, the oil cylinder is located on one side of the hinged end of the lifting arm and the base, a piston rod of the oil cylinder is fixedly connected with the traction block, the horizontal hydraulic jack capable of preventing sudden drop further comprises a safety mechanism, the safety mechanism comprises a drag hook, a hook seat and a release rod, the drag hook comprises two drag arms and a drag rod, the two drag arms are arranged side by side, one end of each drag arm can be sleeved on the traction block in a rotating mode relative to the traction block, the drag rod is transversely arranged between the other ends of, the hook seat is fixed on the base and is located the removal route that lifts arm lift in-process drawbar is close to or keeps away from the hydro-cylinder, on the moving direction that the drawbar is close to or keeps away from the hydro-cylinder, the hook seat is kept away from and is equipped with a hook groove on the side of hydro-cylinder, the unlocking lever middle part articulates on the curb plate of base, the first end of unlocking lever is close to the hook seat, it descends to lift the arm, the drawbar of drag hook removes when the hook inslot to the hook seat, the drawbar arm of drag hook is located the top of the first end of unlocking lever, and the first end of unlocking lever lifts up can contact with the drawbar arm of drag hook this moment.

Furthermore, the draw hook rod of the draw hook is a round rod, and the bottom of the hook groove of the hook seat is arc-shaped. Under this structure, the hook rod and the hook groove are all more slick and sly, and the hook rod of round bar lies in the tank bottom and is the curved hook inslot back, when pulling out the hook groove with the hook rod through the unblock pole, and the hook groove of hook seat is deviate from to the hook rod more.

Further, the inclined plane of the hydro-cylinder is kept away from top to bottom gradually to one side surface of the hook seat below the hook groove and deviating from the hydro-cylinder, and the upper end of the inclined plane is started at the hook groove. This setting can be conveniently when lifting the arm and suddenly falling, and the draw hook pole is kept away from the one side of hydro-cylinder by the hook seat and is close to the hook seat, even if not be located same height with the hook groove of hook seat completely, and the draw hook pole that deviates from the hook groove below also can paste in the hook seat and deviate from hydro-cylinder side surface, smoothly slide to the hook inslot, and it has guaranteed the accuracy that the draw hook pole got into the hook inslot.

Furthermore, the surface of one side of the hook seat, which is far away from the oil cylinder, is an inclined plane which is gradually far away from the oil cylinder from bottom to top. The hydro-cylinder action, the hydro-cylinder piston rod stretches out to when making the lift arm rise to the top, the hook seat is crossed to the drag hook pole of drag hook, and under the structure that the inclined plane of hydro-cylinder was kept away from gradually from lower to upper at a side surface that the hook seat deviates from the hydro-cylinder, the drag hook pole of drag hook can paste in a side surface that the hook seat deviates from the hydro-cylinder and remove to one side of keeping away from the hydro-cylinder, and cross the hook seat smoothly, it has guaranteed that the drag hook pole removes in order to cross the smoothness nature of hook seat.

Furthermore, the number of the hook seats is two, the two hook seats are provided with the same substrate which is fixedly connected with the base, and the two hook seats are transversely arranged side by side relative to the moving path of the draw hook. The utility model discloses, the quantity of hook seat can be one, two or a plurality of, however, when the quantity of hook seat was two, the hook seat structure of two sharing same basement was more firm, and takes place the sudden drop after lifting the arm, and the drag hook pole atress of drag hook removes to the hook inslot of hook seat, and the drag hook pole receives the hook groove of two hook seats spacing, compares that the drag hook pole receives the hook groove of a hook seat spacing, and two hook seats can change the control to the effort of drag hook pole in the ascending homogeneity of drag hook pole axle.

Further, the hook base is located between the two hook arms. When the two ends of the drag hook rod extend to the outer sides of the two drag hook arms, the hook seat can also be arranged on the outer sides of the two drag hook arms and the moving path of the drag hook rod, and when the hook seat is arranged on the outer sides of the two drag hook arms, on one hand, the hook seat occupies a larger space, and on the other hand, when the drag hook rod is matched with the hook groove of the hook seat, a truly closed-loop hook cannot be formed, and the firmness, the stability and the reliability of the hook seat are not good enough; when the hook seat is arranged between the two pull hook arms, the pull hook rod can really realize the closed-loop hook, and the hook rod of the closed-loop hook is more reliably matched with the hook groove of the hook seat.

Furthermore, the first end of the unlocking rod is provided with a shifting block which is transversely arranged relative to the moving path of the draw hook rod. When the second end of the unlocking rod is operated, the first end of the unlocking rod is lifted, so that when the draw hook is lifted, the transverse width of the shifting block which is transversely arranged relative to the moving path of the draw hook rod is large, and the draw hook can be ensured to be smoothly contacted and lifted.

Furthermore, a first limiting block fixed on a side plate of the base is arranged right below the first end of the unlocking rod. The first limiting block is arranged, so that when the second end of the unlocking rod is not operated, the first end of the unlocking rod is carried on the first limiting block below the unlocking rod, and the first end of the unlocking rod is prevented from contacting with the ground to influence the movement.

Further, the first limiting block is a U-shaped block with an upward opening. The first limiting block of the U-shaped block can avoid the contact between the first end of the unlocking rod and the ground, and can also limit the first end of the unlocking rod in the horizontal direction, so that the first end of the unlocking rod is prevented from swinging, and the structure is more stable and reliable.

Further, a second limiting block is arranged right below one side of the unlocking rod close to the second end. When the second end of the unlocking rod is stepped down to lift the first end of the unlocking rod, the second limiting block is arranged to limit the downward movement of the second end of the unlocking rod, the downward stroke of the second end of the unlocking rod is reduced, and the excessively long and unnecessary downward movement of the second end of the unlocking rod is avoided.

Further, the end seat of the oil cylinder is used as a second limiting block. With the structure, excessive structural arrangement can be avoided.

Furthermore, the second end of the unlocking rod is provided with a pedal. The pedal is arranged, so that the operation of the unlocking rod can be facilitated.

The utility model discloses can prevent horizontal hydraulic jack who suddenly falls, through installing the drag hook on the traction frame, and set up one on the base and keep away from the hydro-cylinder side and have the hook groove, and be located the hook seat on the removal route of drag hook, make horizontal hydraulic jack's lifting arm rise the back, when taking place suddenly to fall, in-process that pulling traction frame and drag hook removed to one side that is close to the hydro-cylinder, the drag hook pole of drag hook is through the hook seat, and remove to the hook inslot of hook seat, the drag hook pole is under the spacing of hook groove, because of unable continuation removes, and make the traction frame with the drag hook linkage, lifting arm all stop motion, lifting arm stops to continue to descend, avoid the emergence of incident. The utility model discloses can prevent horizontal hydraulic jack who suddenly falls, two drag hook arms of drag hook pass through the drag hook pole and connect, the drag hook pole is used as "hook portion" with the hook groove matched with of hook seat, the wholeness of drag hook is strong, sound construction, the heavy object suddenly falls when heavier on lifting arm, it still can be used for, can not receive big effort to influence and warp, the hook groove that leads to the drag hook pole of drag hook to deviate from the hook seat loses spacingly, the effect of stopping, and because drag hook pole width broad of horizontal between two drag hook arms, it is guaranteed, it is used as "hook portion", suddenly fall lifting arm, along with the in-process that the traction frame removed to one side that is close to the hydro-cylinder, even if take place small swing along its axial, the drag hook pole still can accurately get into the hook inslot of hook seat, it is spacing by the hook groove, and can not produce because of drag hook pole axial swing, the hook groove dislocation of drag hook pole and hook seat, can.

Drawings

Fig. 1 is a schematic perspective view of a first view angle of the horizontal hydraulic jack capable of preventing sudden drop of the present invention;

fig. 2 is a schematic perspective view of the horizontal hydraulic jack of the present invention at a second viewing angle;

FIG. 3 is a schematic sectional view of a first partial section of the horizontal hydraulic jack capable of preventing a sudden drop of the present invention;

FIG. 4 is a schematic sectional view of a second partial section of the horizontal hydraulic jack capable of preventing a sudden drop of the present invention;

FIG. 5 is a schematic view of the anti-falling horizontal hydraulic jack before the lifting arm of the present invention is raised;

fig. 6 is a schematic side view of the lifting arm of the anti-sudden-descent horizontal hydraulic jack of the present invention after being lifted;

fig. 7 is a schematic diagram of a side-view perspective structure of the anti-falling horizontal hydraulic jack of the present invention when the lifting arm is raised and then lowered;

fig. 8 is a schematic view of the side-looking perspective structure of the drag hook lifted by the unlocking rod when the lifting arm of the horizontal hydraulic jack capable of preventing sudden drop falls back.

Detailed Description

The following detailed description of the embodiments of the horizontal hydraulic jack capable of preventing sudden drop according to the present invention is made with reference to the accompanying drawings:

as shown in fig. 1 to 8, a horizontal hydraulic jack capable of preventing from suddenly dropping comprises a base 10, a lifting arm 1, a traction frame 2 and an oil cylinder 3, wherein the lifting arm 1 is hinged on the base 10, the traction frame 2 comprises two traction arms 21 and a traction block 22, the two traction arms 21 are arranged side by side, one ends of the two traction arms are hinged with the base of the lifting arm 1, the traction block 22 is transversely arranged in the middle of the other ends of the two traction arms 21, the two traction arms 21 can be rotatably sleeved on the traction block 22 relative to the traction block 22, the oil cylinder 3 is arranged on one side of the hinged end of the lifting arm 1 and the base 10, a piston rod 31 of the oil cylinder 3 is fixedly connected with the traction block 22, the horizontal hydraulic jack capable of preventing from suddenly dropping further comprises a safety mechanism 4, the safety mechanism 4 comprises a drag hook 41, a hook seat 42 and a release rod 43, the drag hook 41 comprises two drag hook arms 411 and a drag rod 412, the two drag arms 411 are arranged side by side, one ends of the, the draw hook rod 412 is transversely arranged between the other ends of the two draw hook arms 411, the moving path of the draw hook rod 412 is perpendicular to the rotating central line of the draw hook arms 411 relative to the traction block 22, the hook seat 42 is fixed on the base 10 and is positioned on the moving path of the draw hook rod 412 close to or far from the oil cylinder 3 in the lifting process of the lifting arm 1, in the moving direction of the draw hook rod 412 close to or far from the oil cylinder 3, a hook groove 421 is arranged on one side face, far away from the oil cylinder 3, of the hook seat 42, the middle part of the unlocking rod 43 is hinged on the side plate 101 of the base 10, the first end 431 of the unlocking rod 43 is close to the hook seat 42, when the lifting arm 1 is lowered and the draw hook rod 412 of the draw hook 41 moves into the hook groove 421 of the hook seat 42, the draw hook arm 411 of the draw hook 41 is positioned above the first end 431 of the unlocking rod 43.

In the horizontal hydraulic jack capable of preventing sudden drop, before the lifting arm 1 is not lifted, the hook rod 412 of the hook 41 is positioned at one side of the hook base 42 close to the oil cylinder 3, as shown in fig. 5; when the horizontal hydraulic jack is used, the piston rod 31 of the oil cylinder 3 is ejected out, the traction block 22 of the traction frame 2 is pushed, the traction arm 21 sleeved on the traction block 22 pulls the lifting arm 1, so that the lifting arm 1 rotates and gradually rises by taking the hinged center of the base 10 as a rotation center, the traction block 22 moves to one side far away from the oil cylinder 3 along with the ejection of the piston rod 31, meanwhile, the draw hook 41 sleeved on the traction block is also pushed to move to one side far away from the oil cylinder 3, and when the draw hook rod 412 of the draw hook 41 moves to the hook seat 42, the draw hook rod moves to one side far away from the oil cylinder 3 along the surface of the hook seat 42, as shown in fig. 6; after the lifting arm 1 of the horizontal hydraulic jack is lifted, when the lifting arm is lowered through normal oil unloading operation, the second end 432 of the unlocking rod 43 is operated firstly, the first end 431 of the unlocking rod 43 is lifted, then the oil cylinder 3 acts, the piston rod 31 of the oil cylinder 3 retracts, the retracted oil cylinder piston rod 31 pulls the traction block 22 of the traction frame 2, the traction arm 21 sleeved on the traction block 22 pushes the lifting arm 1, so that the lifting arm 1 rotates by taking the hinge center of the lifting arm 1 and the base 10 as a rotation center and gradually descends, in the process that the traction block 22 moves to one side close to the oil cylinder 3 along with the retraction of the oil cylinder piston rod 31, meanwhile, the drag hook 41 sleeved on the drag hook is also pulled to move to one side close to the oil cylinder 3, when the drag hook rod 412 of the drag hook 41 moves to the hook seat 42, the drag hook 41 moves along the surface of the lifted first end 431 of the unlocking rod 43, and the drag hook rod 412 of the drag hook 41, without entering the hook groove 421 of the hook seat 42, and the lifting arm 1 is completely restored to the state when not in use as the cylinder piston rod 31 is retracted, as shown in fig. 5.

The utility model discloses can prevent horizontal hydraulic jack that suddenly falls, after horizontal hydraulic jack's lifting arm 1 rises, when taking place suddenly to descend suddenly, lifting arm 1 stimulates traction frame 2 and drag hook 41 in proper order, makes it to the one side removal that is close to hydro-cylinder 3, and when drag hook pole 412 of drag hook 41 moved to hook seat 42 department, gets into hook groove 421 of hook seat 42, receives the spacing of hook groove 421, and can't continue to move to make traction frame 2, lifting arm 1 with drag hook 41 linkage all stop the action, lifting arm 1 stops descending, as shown in fig. 7; then, if the lifting arm 1 needs to be lowered, the second end 432 of the unlocking lever 43 is simply operated to lift the first end 431 of the unlocking lever 43, and the lifted first end 431 of the unlocking lever 43 contacts and applies force to the hook arm 411 of the hook 41 above the unlocking lever, so that the hook rod 412 is separated upwards from the hook groove 421 of the hook seat 42 and goes over the hook seat 42, as shown in fig. 8.

The utility model discloses can prevent horizontal hydraulic jack who suddenly falls, through installation drag hook 41 on traction frame 2, and set up one on base 10 and keep away from hydro-cylinder 3 side on have hook groove 421, and be located hook seat 42 on the moving path of drag hook 41, make horizontal hydraulic jack's lifting arm 1 rise the back, when taking place suddenly to fall, pulling traction frame 2 and drag hook 41 are to the in-process that is close to one side removal of hydro-cylinder 3, drag hook rod 412 of drag hook 41 is through hook seat 42, and remove to hook groove 421 of hook seat 42 in, drag hook rod 412 is under hook groove 421 is spacing, because of unable continuation removal, and make traction frame 2 with drag hook 41 linkage, lifting arm 1 all stop motion, lifting arm 1 stops to continue to descend, avoid incident's emergence. The utility model discloses can prevent horizontal hydraulic jack that suddenly falls, two drag hook arms 411 of drag hook 41 pass through drag hook pole 412 to be connected, drag hook pole 412 is used as the "hook portion" with the hook groove 421 matched with of hook seat 42, drag hook 41's wholeness is strong, sound construction, the heavy object suddenly falls when lifting arm 1 is heavier, it still can be used, can not warp by the influence of big effort, lead to drag hook pole 412 of drag hook 41 to deviate from the hook groove 421 of hook seat 42 and lose spacing, effect of stopping, and because the drag hook pole width of transversely putting between two drag hook arms 411 is broad, it is guaranteed, it is used as "hook portion", lifting arm 1 suddenly falls, along with the in-process that traction frame 2 removes to the one side that is close to hydro-cylinder 3, even if take place the micro-swing along its axial, drag hook pole 412 still can accurately get into the hook groove 421 of hook seat 42, is spacing by hook groove 421, and can not produce because of drag hook pole 412 axial swing, drag hook pole 412 misplaces with hook groove 421 of hook seat 42, the phenomenon of hooking and stopping can not be caused.

The horizontal hydraulic jack of the utility model can prevent the sudden drop, and the draw hook rod 412 of the draw hook 41 can be a square rod, a rod following a round rod, a round rod or a rod with other shapes. Preferably, the hook rod 412 of the hook 41 is a round rod, and the bottom of the hook groove 421 of the hook seat 42 is an arc. Under this structure, the hook rod 412 and the hook groove 421 are smooth, and after the hook rod 412 of the round rod is located in the hook groove 421 with the arc-shaped groove bottom, when the hook rod 412 is pulled out of the hook groove 421 through the unlocking rod 43, the hook rod 412 is more easily pulled out of the hook groove 421 of the hook seat 42.

The utility model discloses can prevent the horizontal hydraulic jack who suddenly falls, preferably, a side surface 422 that hook groove 421 below, hook seat 42 deviate from hydro-cylinder 3 is for from top to bottom keeping away from the inclined plane of hydro-cylinder 3 gradually, and this inclined plane upper end is started in hook groove 421. This setting can be conveniently at the lifting arm 1 suddenly drop, and when the draw hook pole 412 was close to hook seat 42 by the one side that hook seat 42 kept away from hydro-cylinder 3, even if not totally be located the same height with hook groove 421 of hook seat 42, and the draw hook pole 412 of deviant hook groove 421 below also can paste in hook seat 42 and deviate from hydro-cylinder 3 a side surface 422, smoothly slide to in the hook groove 421, and it has guaranteed the accuracy that draw hook pole 412 got into in hook groove 421.

The utility model discloses can prevent the horizontal hydraulic jack who suddenly falls, preferably, hook seat 42 deviates from a side surface 423 of hydro-cylinder 3 for keeping away from the inclined plane of hydro-cylinder 3 from lower to upper gradually. The oil cylinder 3 acts, the oil cylinder piston rod 31 extends out, so that when the lifting arm 1 rises upwards, the hook rod 412 of the hook 41 crosses the hook seat 42, and under the structure that one side surface 423 of the hook seat 42 departing from the oil cylinder 3 is an inclined plane which is gradually far away from the oil cylinder 3 from bottom to top, the hook rod 412 of the hook 41 can be attached to one side surface 423 of the hook seat 42 departing from the oil cylinder 3 to move towards one side far away from the oil cylinder 3 and smoothly cross the hook seat 42, and the smoothness that the hook rod 412 moves to cross the hook seat 42 is guaranteed.

The utility model discloses can prevent the horizontal hydraulic jack that suddenly falls, the quantity of hook seat 42 can be one, two or a plurality of. Preferably, the number of the hook bases 42 is two, and the two hook bases 42 have the same base 420 fixedly connected to the base 10, and the two hook bases 42 are arranged side by side transversely to the moving path of the draw hook 41. When the number of the hook bases 42 is two, the two hook bases 42 sharing the same base 420 have firmer structures, and the lifting arm 1 is lifted and then drops suddenly, the pull hook rod 412 of the pull hook 41 is forced to move into the hook groove 421 of the hook base 42, the pull hook rod 412 is limited by the hook grooves 421 of the two hook bases 42, and compared with the limitation that the pull hook rod 412 is limited by the hook groove 421 of one hook base 42, the uniformity of the acting force of the two hook bases 42 on the pull hook rod 412 in the axial direction of the pull hook rod 412 can be controlled more easily.

The utility model discloses can prevent the horizontal hydraulic jack that suddenly falls, preferably, hook seat 42 is located between two hook arms 411. When the two ends of the hook rod 412 extend to the outer sides of the two hook arms 411, the hook base 42 can also be arranged on the outer sides of the two hook arms 411 and the moving path of the hook rod 412, and when the hook base 42 is arranged on the outer sides of the two hook arms 411, on one hand, the hook base occupies a larger space, and on the other hand, when the hook rod 412 is matched with the hook groove 421 of the hook base 42, a truly closed-loop hook cannot be formed, and the firmness, the stability and the reliability of the hook base are not good enough; when the hook base 42 is located between the two hook arms 411, the hook rod 412 can actually realize a closed-loop hook, and the hook rod 412 of the closed-loop hook can be more reliably matched with the hook groove 421 of the hook base 42.

The utility model discloses can prevent horizontal hydraulic jack that suddenly falls, preferably, the first end 431 of unblock pole 43 is equipped with the horizontal shifting block 430 of relative drawbar 412 movement path. When the second end 432 of the releasing lever 43 is operated to lift the first end 431 of the releasing lever 43 and thus the hook 41, the lateral width of the shifting block 430, which is transverse to the moving path of the hook lever 412, is relatively large, which can ensure smooth contact with and lift the hook 41.

The utility model discloses can prevent horizontal hydraulic jack that suddenly falls, preferably, be equipped with first stopper 433 on the curb plate 11 that is fixed in base 1 under the first end 431 of unblock pole 43. The first stopper 433 is provided such that when the second end 431 of the release lever 43 is not operated, the first end 431 of the release lever 43 is mounted on the first stopper 433 therebelow, thereby preventing the first end 431 of the release lever 43 from contacting the ground and affecting the movement.

The utility model discloses can prevent the horizontal hydraulic jack that suddenly falls, preferably, first stopper 433 is the U-shaped piece that the opening is up. The first limiting block 433 of the U-shaped block can not only prevent the first end 431 of the unlocking rod 43 from contacting the ground, but also limit the first end 431 of the unlocking rod 43 in the horizontal direction, so as to prevent the first end 431 of the unlocking rod 43 from swinging, and the structure is more stable and reliable.

The utility model discloses can prevent the horizontal hydraulic jack that suddenly falls, preferably, the unblock pole 43 is close to and establishes second stopper 434 under one side of second end 432. When the second end 432 of the unlocking rod 43 is stepped down to lift the first end 431 of the unlocking rod 43, the second limiting block 434 is arranged to limit the downward movement of the second end 432 of the unlocking rod 43, reduce the downward stroke of the second end 432 of the unlocking rod 43 and avoid the overlong unnecessary downward movement of the second end 432 of the unlocking rod 43.

The utility model discloses can prevent the horizontal hydraulic jack who suddenly falls, preferably, the end seat of hydro-cylinder 3 is used as second stopper 434. With the structure, excessive structural arrangement can be avoided.

The utility model discloses can prevent horizontal hydraulic jack that suddenly falls, preferably, the second end 432 of unblock pole 43 is equipped with pedal 435. The provision of the foot pedal 435 facilitates the operation of the lock release lever 43.

The utility model discloses a horizontal hydraulic jack capable of preventing sudden drop, the traction block 22 can be a block, a square rod or a round rod; the lock release lever 43 may be constituted by one link or two or more links.

The utility model discloses right the utility model belongs to the technical field of the ordinary skilled person, do not deviating from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. The utility model provides a can prevent horizontal hydraulic jack who suddenly falls, includes the base, lifts the arm, traction frame and hydro-cylinder, lifts the arm articulated installation on the base, and traction frame includes two traction arms and a traction block, and two traction arms are side by side and one end and lift the arm basal portion articulated separately, and the traction block is horizontal in the centre of the two traction arm other ends, and two traction arms can pull the block pivoted relatively and cup joint on the traction block, and the hydro-cylinder is located lifting arm and base hinged end one side, the piston rod and the traction block fixed connection of hydro-cylinder, can prevent horizontal hydraulic jack who suddenly falls still includes safety mechanism, its characterized in that: the safety mechanism comprises a drag hook, a hook seat and a release rod, the drag hook comprises two drag hook arms and drag hook rods, the two drag hook arms are arranged side by side, one end of each drag hook arm can be sleeved on the traction block in a rotating way relative to the traction block, the drag hook rods are transversely arranged between the other end parts of the two drag hook arms, the moving path of the drag hook rods is vertical to the rotating central line of the drag hook arms relative to the traction block, the hook seat is fixed on the base and is positioned on the moving path of the drag hook rods close to or far away from the oil cylinder in the, in the moving direction of the draw hook rod close to or far from the oil cylinder, one side surface of the hook seat far from the oil cylinder is provided with a hook groove, the middle part of the unlocking rod is hinged on a side plate of the base, the first end of the unlocking rod is close to the hook seat, when the lifting arm descends and the draw hook rod of the draw hook moves into the hook groove of the hook seat, the drag hook arm of the drag hook is positioned above the first end of the unlocking rod, and the first end of the unlocking rod is lifted up to be contacted with the drag hook arm of the drag hook.

2. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: the draw hook rod of the draw hook is a round rod, and the bottom of the hook groove of the hook seat is arc-shaped.

3. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: the side surface of the hook seat below the hook groove and deviating from the oil cylinder is an inclined plane gradually far away from the oil cylinder from top to bottom, and the upper end of the inclined plane is started in the hook groove.

4. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: the surface of one side of the hook seat, which is far away from the oil cylinder, is an inclined plane which is gradually far away from the oil cylinder from bottom to top.

5. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: the quantity of the hook seats is two, the two hook seats are provided with the same substrate which is fixedly connected with the base, and the two hook seats are transversely arranged side by side relative to the moving path of the draw hook.

6. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: the hook seat is positioned between the two hook pulling arms.

7. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: the first end of the unlocking rod is provided with a shifting block which is transversely arranged relative to the moving path of the draw hook rod.

8. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: a first limiting block fixed on a side plate of the base is arranged right below the first end of the unlocking rod.

9. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: a second limiting block is arranged right below one side of the unlocking rod close to the second end.

10. The horizontal hydraulic jack capable of preventing sudden drop according to claim 1, wherein: the second end of the unlocking rod is provided with a pedal.

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