CN212450422U - Locking device that falls is prevented to jack - Google Patents

Abstract

The utility model discloses a locking device prevents falling of jack, including the jack casing, tip is equipped with the boss under the jack casing inner chamber, jack casing upper end fixed grafting has the adapter sleeve, the adapter sleeve has adjusting screw through threaded connection, adjusting screw upper end fixed mounting has the connecting seat, the connecting seat upper end is equipped with spacing seat, connecting seat lateral surface middle part activity is pegged graft and is had the action bars, the adjusting screw inner chamber is equipped with spacing draw-in groove, swing joint has the stopper in the spacing draw-in groove, the stopper lateral surface is equipped with the sealing ring, tip fixed mounting has locking screw under the stopper, there is the limiting plate tip under the adjusting screw through threaded connection. This kind of locking device that falls is prevented to jack can improve the vacuum in the spacing draw-in groove, plays to jack and prevents falling the locking effect to reach the effect that improves jack safety in utilization.

Description

Locking device that falls is prevented to jack

Technical Field

The utility model relates to a jack technical field specifically is a locking device prevents falling by jack.

Background

The jack is light and small lifting equipment which takes a rigid jacking piece as a working device and jacks a heavy object through a top bracket or a bottom supporting claw within a small stroke. The jack is mainly used for the departments of factories, mines, transportation and the like as vehicle repair, other lifting, supporting and the like. The structure is light, firm, flexible and reliable, and can be carried and operated by one person. The jacks are divided into a mechanical jack, a hydraulic jack and the like, and the principles are different. In principle, the most basic principle on which a hydraulic drive is based is pascal's law, i.e. the pressure is uniform throughout the liquid. Thus, in a balanced system, a relatively small piston exerts a relatively small pressure on it, while a large piston exerts a relatively large pressure on it, which keeps the liquid still. Therefore, different pressures at different ends can be obtained by the liquid transfer, and the purpose of conversion can be achieved. The common hydraulic jack uses the principle to achieve the force transmission. The screw jack pulls the handle in a reciprocating way, the claw pulls the ratchet wheel to rotate in a clearance way, the bevel pinion drives the bevel pinion to rotate the lifting screw rod, and therefore the lifting sleeve is lifted or lowered. The existing jack is not provided with a falling-preventing locking protection device in the using process, and certain potential safety hazards exist in the using process, so that the falling-preventing locking device for the jack is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a locking device is prevented falling by jack to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a locking device that falls is prevented to jack, includes the jack casing, the tip is equipped with the boss under the jack casing inner chamber, jack casing upper end fixed grafting has the adapter sleeve, the adapter sleeve has adjusting screw through threaded connection, adjusting screw upper end fixed mounting has the connecting seat, the connecting seat upper end is equipped with spacing seat, connecting seat lateral surface middle part activity grafting has the action bars, the adjusting screw inner chamber is equipped with spacing draw-in groove, swing joint has the stopper in the spacing draw-in groove, the stopper lateral surface is equipped with the sealing ring, tip fixed mounting has locking screw under the stopper, there is the limiting plate under the locking screw through threaded connection.

Preferably, a limiting plate is fixedly mounted at the upper end part of the boss, and the limiting plate is T-shaped.

Preferably, the lower end part of the adjusting screw rod is movably inserted with a locking screw rod, and the locking screw rod is movably inserted in the middle of the boss.

Preferably, the sealing ring and the limiting block are arranged in the limiting clamping groove, and the cross sections of the sealing ring and the limiting block are circular.

Preferably, the boss, the locking screw and the adjusting screw are all concentric.

Compared with the prior art, the beneficial effects of the utility model are that: this kind of locking device that falls is prevented to jack through setting up locking screw, adapter sleeve, boss, limiting plate, sealing ring, stopper and spacing seat structure, after rotating the action bars, adjusting screw and jack casing interval increase, treat after the jack adjustment, manual rotatory locking screw, the position of adjustment sealing ring in spacing draw-in groove improves the vacuum in the spacing draw-in groove, plays the locking effect that falls of preventing to jack to reach the effect that improves jack safety in utilization.

Drawings

FIG. 1 is a partial main sectional view of the structure of the present invention;

fig. 2 is a bottom view of the structure of the present invention.

In the figure: the jack comprises a jack shell 1, a connecting sleeve 2, a boss 3, a limiting plate 4, a locking screw 5, a sealing ring 6, a limiting block 7, a limiting clamping groove 8, a limiting seat 9, a connecting seat 10, an operating rod 11 and an adjusting screw 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a locking device prevents falling of jack, includes jack casing 1, the tip is equipped with boss 3 under the 1 inner chamber of jack casing, 3 fixed welding of boss are on jack casing 1, and boss 3 and jack casing 1 center collineation, 3 upper end fixed mounting of boss have limiting plate 4, limiting plate 4 is "T" font. The limiting plate 4 is fixedly welded at the upper end of the boss 3, the limiting plate 4 is fixedly inserted on the upper end face of the boss 3, the connecting sleeve 2 is fixedly inserted at the upper end of the jack shell 1, the connecting sleeve 2 is fixedly welded on the jack shell 1, the connecting sleeve 2 is connected with an adjusting screw 12 through threads, the lower end part of the adjusting screw 12 is arranged in the jack shell 1, the upper end part of the adjusting screw 12 is fixedly provided with a connecting seat 10, the connecting seat 10 is fixedly welded on the adjusting screw 12, the central lines of the connecting seat 10 and the adjusting screw 12 are perpendicular to each other, the upper end part of the connecting seat 10 is provided with a limiting seat 9, the limiting seat 9 is fixedly welded on the connecting seat 10 and is provided with a limiting seat 9 which can limit the downward position of the adjusting screw 12, the middle part of the outer side face of the connecting seat 10 is movably inserted with an operating rod, the lag material is flexible rubber, through setting up the lag, can ensure the security that the operator used, reduces the friction of action bars 11 and user's hand, adjusting screw 12 inner chambers are equipped with spacing draw-in groove 8, adjusting screw 12 lower tip is located to spacing draw-in groove 8, adjusting screw 12 lower tip activity is pegged graft and is had locking screw 5, locking screw 5 external diameter is less than adjusting screw 12 external diameter, locking screw 5 activity is pegged graft in 3 middle parts of boss. Swing joint has stopper 7 in the 8 interior swing joints of spacing draw-in grooves, stopper 7 fixed welding is in locking screw 5 upper end, 7 lateral surfaces of stopper are equipped with sealing ring 6, adjusting screw 12 and locking screw 5's leakproofness can be guaranteed to sealing ring 6, when locking screw 5 is at 8 internalization of spacing draw-in grooves, can adjusting screw 12 and locking screw 5 be connected the leakproofness to the upper end that makes spacing draw-in groove 8 is in approximate vacuum form, sealing ring 6 and stopper 7 are all located in spacing draw-in groove 8, and sealing ring 6 and stopper 7 cross-section all are circularly. The end fixed mounting has locking screw 5 under the stopper 7, there is limiting plate 4 tip under the locking screw 5 through threaded connection. The boss 3, the locking screw 5 and the adjusting screw 12 are all concentric. When the anti-falling locking device of the jack is used, the operating rod 11 is manually held, after the operating rod 11 is rotated, the distance between the adjusting screw 12 and the jack shell 1 is increased, after the jack is adjusted, the locking screw 5 is manually rotated, the position of the sealing ring 6 in the limiting clamping groove 8 is adjusted, the upper end of the limiting clamping groove 8 is in a state similar to vacuum, so that the vacuum degree in the limiting clamping groove 8 is improved, the jack has an anti-falling locking effect, and the use safety of the jack is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a locking device that falls is prevented to jack, includes jack casing (1), its characterized in that: jack casing (1) inner chamber lower tip is equipped with boss (3), jack casing (1) upper end is fixed to be pegged graft and is had adapter sleeve (2), adapter sleeve (2) have adjusting screw (12) through threaded connection, adjusting screw (12) upper end fixed mounting has connecting seat (10), connecting seat (10) upper end is equipped with spacing seat (9), connecting seat (10) lateral surface middle part activity is pegged graft and is had action bars (11), adjusting screw (12) inner chamber is equipped with spacing draw-in groove (8), swing joint has stopper (7) in spacing draw-in groove (8), stopper (7) lateral surface is equipped with sealing ring (6), tip fixed mounting has locking screw (5) under stopper (7), end has limiting plate (4) through threaded connection under locking screw (5).

2. A jack anti-drop locking device as claimed in claim 1, wherein: a limiting plate (4) is fixedly mounted at the upper end of the boss (3), and the limiting plate (4) is T-shaped.

3. A jack anti-drop locking device as claimed in claim 1, wherein: the lower end part of the adjusting screw rod (12) is movably inserted with a locking screw rod (5), and the locking screw rod (5) is movably inserted in the middle of the boss (3).

4. A jack anti-drop locking device as claimed in claim 1, wherein: sealing ring (6) and stopper (7) all locate in spacing draw-in groove (8), and sealing ring (6) and stopper (7) cross-section all are circular.

5. A jack anti-drop locking device as claimed in claim 1, wherein: the boss (3), the locking screw (5) and the adjusting screw (12) are all concentric.

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