CN204952128U - Pulley combination protection device - Google Patents

Abstract

The utility model relates to a pulley combination protection device, including fixed plate, activity curb plate and rope sheave, the rope sheave shaft locating the fixed plate with move about between the curb plate, the alignment connecting hole has been seted up on fixed plate and the activity curb plate, characterized by: section rope sheave one side anticreep grooving of having bent of going to court is extended to the fixed plate lower part, and has a brake cam through the round pin shaft locating, this brake cam the torsional spring effect push down to the anticreep grooving. The utility model has the characteristics of simple structure, reasonable in design, safe in utilization, utilize the fixed plate to extend anticreep grooving and the one -way braking cam of setting up in the section, both avoided taking off the rope risk, can apply the brake the rope again and move down, reach automatic protective action, guarantee the personal safety, satisfy needing of activities such as rescue, rock climbing.

Description

A combination protection device for pulleys

Technical field:

The utility model particularly relates to a pulley combination protection device, which is especially suitable for activities such as rock climbing and rescue.

Background technique:

The pulleys can change the direction of the applied force, and a simple combination of double pulleys can double the applied force. Application No. 201410814875.5 discloses an improved pulley device, which includes a first pulley and a second pulley, both of which have two pulleys; any pulley is provided with a self-locking device, which can prevent the rope from moving in the opposite direction; The self-locking device is a trigger with a braking surface, which presses the rope on the sheave under the action of the torsion spring, allowing the rope to move in one direction only. The application self-locking device is directly installed inside the pulley, which brings inconvenience to the unlocking operation. How to improve the deficiencies of the prior art becomes the research object of the present utility model.

Invention content:

The purpose of this utility model is to invent an anti-off rope groove on the fixed plate of the pulley, and a brake cam is arranged on the opening side of the anti-off rope groove. By means of the brake cam and the anti-off rope groove, the rope is single Self-locking pulley combination protection device.

The technical scheme of the utility model is realized in the following way: a combination protection device for pulleys, comprising a fixed plate, a movable side plate and a rope wheel, the sheave shaft is positioned between the fixed plate and the movable side plate, and the fixed plate and the movable side plate There are alignment connection holes; the feature is that: the extension section of the lower part of the fixing plate is bent toward the side of the sheave with an anti-off rope groove, and a braking cam is positioned through the pin shaft, and the braking cam is pressed to the side under the action of the torsion spring. The anti-off rope groove.

The brake cam has a triangular structure, one short side forms a cam surface, the other long side has a storage groove, and the reserved shaft hole has a recess, the torsion spring is installed in the recess, and one end is inserted into the recess. The other end is inserted into the positioning hole of the fixed plate or the washer fixed with the fixed plate; there is a handle positioned on the end of the brake cam away from the cam surface, and the handle can be stored in the storage groove. A small torsion spring is sheathed on the shaft of the positioning handle, and the two spring arms of the small torsion spring are in contact with the storage groove and the handle respectively, so as to keep the handle in a storage tendency.

The cam surface of the braking cam pressed against the anti-off rope groove is provided with corrugated teeth.

The two sides of the fixed plate are respectively provided with a movable side plate, and a sheave is symmetrically positioned through a through shaft; the lower end of the extended section of the fixed plate is also provided with a rope hole.

The utility model has the characteristics of simple structure, reasonable design, and safe use; by using the anti-off rope groove and one-way braking cam added on the extension section of the fixed plate, the risk of off-rope can be avoided, and the downward movement of the rope can be braked to achieve Automatic protection to ensure personal safety and meet the needs of rescue, rock climbing and other activities.

Description of drawings:

Below in conjunction with specific legend the utility model is further described:

Figure 1 Stereoscopic schematic diagram of pulley combination protection device

Figure 2 Schematic diagram of the open state of the brake cam of the combined pulley protection device

Fig. 3 three-dimensional exploded schematic diagram of pulley combination protection device

in

1—fixed plate 11—extension section 12—anti-loosening groove 13—connection hole

14—rope hole 15—gasket 2—movable side plate 3—rope wheel

4—Through shaft 41—Pin shaft 5—Brake cam 51—Cam surface

52—storage slot 53—concave 54—torsion spring 6—handle

61—small torsion spring 7—rope

detailed description:

Referring to Fig. 1, Fig. 2 and Fig. 3, the combined protection device for pulleys includes a fixed plate 1, a movable side plate 2 and a sheave 3, and the axis of the sheave 3 is positioned between the fixed plate 1 and the movable side plate 2, and the fixed plate 1 and the movable side plate The movable side plate 2 is provided with an alignment connection hole 13; this illustration is a combination of double rope pulleys, that is, a movable side plate 2 is respectively provided on both sides of the fixed plate 1, and two rope pulleys 3 are positioned symmetrically through a through shaft 4. A rope hole 14 is also provided at the lower end of the lower extension section 11 of the fixing plate 1 .

On the extension section 11 of fixed plate 1 bottom, be bent with anti-off rope groove 12, this anti-off rope groove 12 is towards a sheave 3, more specifically, it is better to be tangent to the rope groove on this sheave 3, like this Can not scrape the rope 7; On the extension section 11, a braking cam 5 is also positioned by a pin shaft 41, the braking cam 5 is in a triangular structure, one short side forms a cam surface 51, and one long side has a receiving groove 52, The reserved shaft hole has a recess 53, and a torsion spring 54 is installed in the recess 53. One end of the torsion spring 54 is inserted in the positioning hole of the recess 53, and the other end is inserted in the fixed plate 1 or connected with the fixed plate. On the positioning hole of the fixed washer 15, the brake cam 5 keeps the tendency of being pressed to the anti-off rope groove 12 under the action of the torsion spring 54. The rope 7 does not act as a restraint; once the rope 7 moves in the opposite direction, the same as the swing direction of the torsion spring force acting on the brake cam 5, the brake cam 5 will tighten the rope 7 to the anti-off rope groove 12 to realize automatic braking. Play the role of accidental fall protection. In order to improve the braking force and avoid slipping, corrugated teeth are provided on the cam surface 51 of the brake cam 5 pressed against the anti-off rope groove 12 .

Further, a handle 6 is positioned axially at the end of the brake cam 5 away from the cam surface 51, and the handle 6 can be stored in the receiving groove 52, and a small torsion spring 61 is sleeved on the shaft of the positioning handle 6, and the small torsion spring 61. The two spring arms are in contact with the storage groove 52 and the handle 6 respectively, keeping the handle 6 in the storage state all the time, and it can be opened artificially only when necessary; The braking cam 5 is opened, allowing the rope 7 to move downward under control.

Claims (4)

1. A combination protection device for pulleys, comprising a fixed plate, a movable side plate and a rope wheel, the sheave shaft is positioned between the fixed plate and the movable side plate, and the fixed plate and the movable side plate are provided with alignment connection holes; its features It is: there is an anti-loosening rope groove bent towards the side of the sheave on the extension section of the lower part of the fixing plate, and a braking cam is positioned through the pin shaft, and the braking cam is pressed to the anti-loosening rope groove under the action of a torsion spring. 2. A combination pulley protection device according to claim 1, characterized in that: the brake cam is in a triangular-like structure, one short side forms a cam surface, one long side has a receiving groove, and the reserved shaft hole has a bearing The torsion spring is installed in the recess, one end is inserted in the positioning hole of the recess, and the other end is inserted in the positioning hole of the fixed plate or the gasket fixed with the fixed plate; the brake cam is in the A handle is located on the shaft far from the cam surface, and the handle can be stored in the storage slot. A small torsion spring is sleeved on the shaft of the positioning handle. favorite trends. 3. A combination pulley protection device according to claim 1 or 2, characterized in that: the cam surface of the brake cam pressing against the anti-off rope groove is provided with corrugated teeth. 4. A pulley combined protection device according to claim 1 or 2, characterized in that: a movable side plate is respectively provided on both sides of the fixed plate, and a rope pulley is positioned symmetrically through a through axis; the lower end of the extended section of the fixed plate There is also a rope hole at the bottom.