CN2347949Y - Improved handle - Google Patents

Abstract

An improved hand puller is characterized in that an arm and a ratchet are coaxially pivoted inside a bracket body, a double ratchet is pivoted on the arm, and a clamping device is pivoted on the side of the ratchet at the other end of the bracket body, a C-shaped spring is fixed in the bottom cover of the bracket body, the clamping device includes double clamping claws, double convex rods and a hollow tube body integrally formed with a return spring pivoted on the bracket body by an axle rod, and the C-shaped spring cooperates with the ratchet pivoted on the arm and the positioning spring fixed at the rear end of the ratchet. By means of the above structure, the hand puller can brake the ratchet more effectively and safely, prevent the ratchet from reversing, prevent heavy objects from falling, and ensure the safety of the operator.

Description

Improved handle

The utility model relates to a lifting device, in particular to an improved hand puller which can prevent heavy objects from falling and ensure the safety of operators.

The hand puller is a tool that must be frequently used in manufacturing industries such as general factories, auto repair shops, or towing factories. Due to limited physical strength, when some heavy machines or parts need to be moved, the hand puller can be used. Using its towing function not only prevents the operator from being injured by improperly moving heavy objects with bare hands, but also saves time and effort compared with bare-handed operation. Therefore, the hand puller is widely used by people in the industry. Please refer to shown in Fig. 1, the structure of conventional product (promptly on May 21st, 78 the improved structure of the wire rope winch of the No. Pivoted inside the support body (13), the top of the support body (13) is provided with an upper hook (14), one end of the steel cable (15) is fixed on the bottom of the support body (13), and the other end is wound and fixed on the ratchet (12 ), the bottom of the steel cable (15) wears the pulley (17) of the lower hook (16), so that the hook (16) can play the role of a fixed pulley by the action of the steel cable (15). Wherein the brake pawl (18) is pivotally connected on the arm bar (11) by a shaft, and the rear end of the brake pawl (18) is fixedly connected with a metal reed (19), and the metal reed (19) is The other end is fixed on the arm bar (11), and the distance is slightly smaller than the length of the metal reed (19), so that the connected metal reed (19) is in an upward or downward zigzag state, and can be The front end of the brake pawl (18) in the zigzag state engages on the ratchet (12) or breaks away from the range of engagement of the teeth of the ratchet (12). The locking device of the hand puller is composed of a backstop claw (20) and a protruding rod (21) connected to a hollow shaft (22) and a return spring (23). A top bolt bar (24) is obliquely arranged on the top, and the mandrel (22) and the return spring (23) are connected in parallel and pivotally connected to the inner side of the support body (13) with an axle bar (25), and the two ends of the return spring (23) Each hook of end hook body is fastened on the inwall of support body (13) and on the protruding rod (21), impels backstop pawl (20) and ratchet (12) tooth to be in the clamping state. And ratchet (12) can only do unidirectional rotation, cooperates the front end of pawl (18) on the arm bar (11) to top on the ratchet (12) tooth, and arm bar (11) pulls up and can make ratchet ( 12) twisted steel cable (15) lifts weight. If you want to drop a heavy object, bend the reed (19) above the arm (12) downward, so that the claw (18) is out of the range of the ratchet (12), and turn the arm (11) to the uppermost end , make pawl piece (18) press top bolt lever (24), or pull protruding lever (21), force backstop claw (20) to separate with ratchet (12) tooth, and drop weight.

However, although this kind of puller is practical, it still has the following disadvantages in actual use:

Because the clamping device is only in a one-sided clamping state with a reverse stop claw (20) and the ratchet (12), it causes unbalanced force and affects the clamping effect. If the operation is improper, the clamping effect will be lost immediately, and the reverse of the ratchet will cause the danger of heavy objects falling sharply, which will directly endanger the safety of the operator, which will cause extremely serious consequences.

In view of this, the author has accumulated many years of experience in the manufacture and sale of various hardware hand tools, and after many trials and improvements, he finally developed a cost-effective utility model.

The main purpose of this utility model is to provide an improved hand puller to eliminate the above-mentioned shortcomings of the conventional structure. It will not The danger of falling of the heavy objects of the machine tool is avoided, so that the safety of the operator is guaranteed.

The purpose of this utility model is achieved by the following technical solutions.

An improved hand puller, the arm rod and the ratchet are coaxially pivoted inside the bracket body, a pair of ratchets are pivotally arranged on the arm rod, and a locking device is pivotally installed on the side of the ratchet wheel at the other end of the bracket body, and at the same time A C-shaped reed that can clamp the steel cable on the ratchet is fixed in the bottom cover of the bracket body. It is characterized in that the clamping device is formed by two structurally reinforced backstop claws and two protruding rods. One body is axially symmetrically connected to the hollow pipe body, and a return spring is connected in parallel and pivoted to the inner side of the support body by a shaft. The inner wall of the bracket; the pair of pawls are pivotally connected to the Y-shaped arm bar, and a positioning spring is locked at the rear end; the C-shaped reed is fixed in the bottom cover and can be clamped A steel cable coiled on a ratchet.

With the above-mentioned structure, the ratchet can be prevented from reversing and loosening, and can be stably locked, so as to improve the safety of operators and prevent heavy objects from falling.

Concrete structure of the present utility model is provided in detail by following embodiment and accompanying drawing thereof.

Fig. 1 is a combined stereoscopic view of a conventional hand puller.

FIG. 1A is an enlarged schematic view of the part shown in FIG. 1 .

Fig. 2 is an exploded perspective view (1) of the utility model.

Fig. 3 is an exploded perspective view (2) of the utility model.

Fig. 4 is an exploded perspective view (3) of the utility model.

Fig. 5 is a combined perspective view of the utility model.

Fig. 6 is a schematic diagram of a preferred embodiment of the present invention.

First of all, please refer to Fig. 2, the utility model is an improved hand puller, which is mainly a clamping device in the hand puller, and is characterized in that the backstop claw (30) reinforced by two structures and two convex The rod (31) is connected to a hollow tube (32) and combined with a return spring (33), wherein the backstop claw (30) and the protruding rod (31) are integrally formed and connected to the hollow tube in axisymmetric manner (32), the mandrel (32) and the return spring (33) are connected in parallel and pivotally connected to the inner side of the support body (40) by the shaft rod (34) bushing (341). And one end of the return spring (33) hooks the transverse groove (35) on the protruding rod (31), and the other end is embedded in the support body (40) inwall, impels the backstop pawl (30) and the ratchet (41) ) teeth are locked, at this time, the ratchet can only rotate in one direction. A spring (36) and a push bolt lever (37) are obliquely arranged on the backstop pawl (30), and the push bolt lever (37) passes through the spring (36) and is pivotally connected to the bolt hole (30) on the backstop claw (30). 38), make it have the mobility of pressing down. Make the fixed C-shaped reed (39) in the bottom cover (42) of the support body (40) to clamp the steel cable (43) that is wound on the ratchet (41), as shown in Figure 3, cooperate The shape of the double ratchet (45) that is coaxially pivoted on the Y-shaped arm bar (44) of the support body (40) with the ratchet (41), and the positioning spring (46) connected to the rear end of the ratchet (45) ) and the adjusting button (47) on the arm lever (44), as shown in Figure 4.

See also shown in Fig. 5, 6 again, the usage situation of the present utility model and the expected effect, the advantages are described as follows.

Rotate the adjustment button (47) to make the top of the ratchet (45) fit on the teeth of the ratchet (41), and pull the arm lever (44) upward to promote the ratchet (41) to pull the steel cable (43) to lift the weight; If you want to drop a heavy object, turn the adjustment button (47) to make the pawl (45) out of the range of the teeth of the ratchet (41), turn the arm lever (44) to the uppermost end, and make the pawl (45) press the top The bolt bar (37) forces the backstop pawl (30) to separate from the ratchet (41) teeth, and the positioning spring (46) behind the ratchet (45) is also pushed by the spring (36) because of the ratchet (45) ( 37) the reaction force effect makes ratchet (45) enter in the range of ratchet (41) tooth clamping, as shown in Figure 6, so, can only move back one tooth ratchet (41) at a time by suppressing ejector bolt bar (37), Prevent heavy objects from falling quickly. Simultaneously, it has the effect of making the two backstop pawls (30) more firmly clamped and preventing the ratchet (41) from reversing. The C-shaped reed (39) fixed on the bottom cover (42) also has a clamping steel cable ( 43) role.

By virtue of the composition of the above components, the reverse rotation of the ratchet can be effectively prevented, the safety of operators can be improved and the danger of heavy objects slipping can be prevented.

To sum up, the utility model is a novel structural design with wide applicability and safety, and has novelty, creativity and practicability, so the application is filed according to law.

Claims (1)

1, a kind of hand controller of improvement is to be hubbed at stake body inside with armed lever, coaxial ratchet, and a pair of ratchet is pivoted on the armed lever, and in the stake body side of end ratchet in addition, the holder that is pivoted, but in the bottom of stake body, set firmly the C shape reed of cable wire on the clamping ratchet simultaneously, it is characterized in that

A described holder, it is to be connected on the hollow tube axisymmetricly by two structure-reinforced check pawl and two nose bar moulding one, cooperate a returning spring parallel connection to be articulated in the inboard of stake body by an axostylus axostyle, returning spring one end Jiong shape hook hooks the transverse concave groove on the nose bar, and other end inlay card is at the stake body inwall;

Described a pair of ratchet is to be articulated on the Y shape armed lever, its rear end locking one location spring;

A described C shape reed is to be installed in the bottom, but the cable wire of reeling on the clamping ratchet.

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