CN208054769U - A kind of special galianconism device of foundation construction - Google Patents

Abstract

The utility model provides a special short arm device for foundation construction, which includes a bracket body, two connecting arms extending horizontally and backwards are fixedly connected to the rear of the bracket body, pull plates are arranged above the two connecting arms, and the front ends of the pull plates are hinged. The included angle between the bracket body and the connecting arm is adjustable; the front of the bracket body is two front fork arms extending forward, and at least two pulleys are arranged at intervals between the two front fork arms. The front part, the upper part and the lower part are all equipped with a rope stop device to prevent the wire rope from falling off. Compared with the prior art, the utility model has a simple and practical structure and a strong lifting capacity. At least two pulleys are installed on the short arm to realize single-rate high-speed lifting and lowering. At the same time, the main arm head can lift heavy objects at multiple rates. At least 3 winches can be lifted and lowered at the same time, saving the time for changing the magnification, convenient to meet the needs of different working conditions, and improve work efficiency.

Description

A special short arm device for foundation construction

technical field

The utility model relates to the field of crane equipment, in particular to a special short arm device for foundation construction of crawler cranes.

Background technique

At present, in the field of foundation construction, the crawler crane required by customers must be able to efficiently lift and lower two hoists at the same time, and also meet the requirements that the third hoist can cooperate with heavy-duty construction equipment. However, the short arm of the existing crawler crane has a low load-carrying capacity and only has one pulley. During construction, the main arm can either be quickly raised and lowered with a single rate, or the lifting capacity can be increased with multiple rates, which can only meet one of them. ; And the boom needs to be put down every time it is switched to use, and the rope-threading magnification of the winch is changed again, which greatly affects the overall construction efficiency.

Contents of the invention

The purpose of this utility model is to provide a special short arm device for foundation construction in view of the deficiencies in the above-mentioned prior art. By increasing the bearing capacity of the short arm, at least two pulleys are installed on the short arm, and the double pulley can be realized on the short arm. Hoisting, at the same time realize single-rate high-speed lifting and lowering, and at the same time, the boom head of the main boom can hoist heavy objects at multiple rates, saving the time for changing the magnification and improving work efficiency. In order to solve the above problems, the utility model provides a special short arm device for foundation construction.

The purpose of this utility model is achieved in the following manner:

A special short-arm device for foundation construction, comprising a support body, two connecting arms extending horizontally and backwards are fixedly connected to the rear of the support body, pull plates are arranged above the two connecting arms, and the front ends of the pull plates are hinged on the support body And the angle between the connecting arm and the connecting arm is adjustable. The rear end of the connecting arm is provided with a through hole for connecting with the front lower part of the main arm head of the crawler crane. The front upper part of the hinged through hole; the front of the bracket body is two front fork arms extending forward, and at least two pulleys placed at intervals are arranged between the two front fork arms. A rope retaining device is provided to prevent the wire rope from falling off, and the two ends of the rope retaining device are respectively connected to the extension arm, and the other end of the extension arm is fixedly connected to the front end of the front fork arm.

Spacer sleeves for fixing the position of the pulleys are arranged between the pulleys placed at intervals.

The shaft of the rope retaining device is a round steel, and a plurality of steel pipes are sheathed on the round steel, and the length of the steel pipes is greater than or equal to the width of the groove on the pulley for winding the wire rope.

The front end of the front fork arm is provided with a through hole, and a pulley shaft is installed in the through hole, and a pulley is sleeved on the pulley shaft.

Beneficial effects: Compared with the prior art, the utility model has a simple and practical structure and a strong lifting capacity. Two or more pulleys are installed on the short arm, and at the same time realize single-rate high-speed lifting and lowering, and at the same time, the main arm head can be hoisted at multiple rates. For heavy loads, at least 3 winches can be lifted and lowered at the same time, which saves time for changing the magnification, facilitates meeting the needs of different working conditions of foundation construction, and improves work efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the combination of the utility model and the arm head of the crawler crane.

Among them, 1 is the pull plate; 2 is the pin shaft; 3 is the bracket body; 4 is the pulley; 5 is the rope stop device; 6 is the connecting arm; 7 is the arm head; 8 is the pulley shaft; Extend your arms.

Detailed ways

As shown in Figure 1, a special short arm device for foundation construction includes a bracket body 3, the bracket body 3 is a box-shaped structure, the top view of the bracket body 3 is an inverted U-shaped front opening, and the rear of the bracket body 3 is fixed. The two connecting arms 6 extending horizontally backwards are provided with a pull plate 1 above the two connecting arms 6, and the front end of the pull plate 1 is hinged on the bracket body 3 through a pin shaft 2 and the angle between the connecting arms 6 is Adjustable, the rear end of the connecting arm 6 is provided with a through hole for connecting with the front lower part of the main arm head 7 of the crawler crane through the pulley shaft 8, and the rear end of the pull plate 1 is provided with a hole for connecting with the main arm head 7. The front upper part is through the through hole hinged by the pin shaft 2; the front of the bracket body 3 is two front fork arms 9 extending forward, and two pulleys 4 placed at intervals are arranged between the two front fork arms 9. The front part, the upper part and the lower part are all equipped with a rope stopper 5 to prevent the steel wire rope from falling off, and the steel wire rope is protected in multiple directions. The front end of front wishbone 9.

The pull plate 1 has a variety of specifications, and the pull plate 1 of different specifications has different lengths. The pull plate 1 of different lengths is convenient for adjusting the angle between the pull plate 1 and the connecting arm 6, thereby adjusting the short arm and the main arm. The angle between them can change the stress state of the short arm, improve the bearing capacity of the short arm, and provide different bearing capacity and working radius.

Spacer sleeves for fixing the position of the pulleys 4 are arranged between the pulleys 4 placed at intervals, and the relative position between the hooks is changed by adjusting the position of the pulleys 4 to meet the safety distance between the hooks.

The shaft of the rope retaining device 5 is a round steel, and the round steel is covered with a plurality of steel pipes, so that no matter how the position of the pulley 4 changes, the wire rope can be protected against falling off, and the length of the steel pipe is greater than or equal to that on the pulley 4. The width of the groove for winding the wire rope, such a structure makes the wire rope not easy to fall off.

Preferably, the front end of the front fork arm 9 is provided with a through hole, the pulley shaft 8 is installed in the through hole, and the pulley 4 is sleeved on the pulley shaft 8 .

The working state of the combination of the special short arm device of the utility model and the arm head of the crawler crane is shown in Figure 2, the rear end of the connecting arm 6 is connected with the hoisting pulley shaft 8 at the front lower part of the main arm arm head 7 of the crawler crane , the rear end of the pull plate 1 is hinged with the front upper part of the arm head 7 through the pin shaft 2. When working, the pulley at the front of the boom head 7 can hoist heavy objects with multiple ratios, and the two pulleys on the short arm can realize double hoisting, which can realize three hoisting and lowering at the same time, which is convenient to meet the needs of different working conditions .

The above is only the preferred embodiment of the utility model, it should be pointed out that for those skilled in the art, without departing from the overall concept of the utility model, some changes and improvements can also be made, and these should also be regarded as The protection scope of the utility model, these all can not affect the effect that the utility model implements and the practicability of the patent.

Claims (4)

1. A special short arm device for foundation construction, characterized in that: it includes a bracket body (3), the rear of the bracket body (3) is fixedly connected with two connecting arms (6) extending horizontally and backwards, and the two connecting arms (6) ) are provided with pull plates (1), the front end of the pull plate (1) is hinged on the bracket body (3) and the angle between it and the connecting arm (6) is adjustable, and the rear end of the connecting arm (6) There is a through hole for connecting with the front lower part of the main arm head (7) of the crawler crane, and the rear end of the pull plate (1) is provided with a through hole for hinged connection with the front upper part of the main arm head (7) ; The front of the bracket body (3) is two front fork arms (9) extending forward, and at least two pulleys (4) placed at intervals are arranged between the two front fork arms (9). The front part, the upper part and the lower part are all equipped with a rope stopper (5) to prevent the wire rope from falling off. The two ends of the rope stopper (5) are respectively connected to the extension arm (10), and the other end of the extension arm (10) is fixed on the front end of the front wishbone (9). 2. The special short arm device for foundation construction according to claim 1, characterized in that: spacers for fixing the position of the pulleys (4) are provided between the pulleys (4) placed at intervals. 3. The special short arm device for foundation construction according to claim 1, characterized in that: the shaft of the rope retaining device (5) is a round steel, and a plurality of steel pipes are sheathed on the round steel, and the length of the steel pipes is greater than or equal to the pulley (4) The width of the groove for winding the wire rope. 4. The special short arm device for foundation construction according to claim 1, characterized in that: the front end of the front fork arm (9) is provided with a through hole, and a pulley shaft (8) is installed in the through hole, and the pulley shaft (8) Pulley (4) is covered with on.