CN212246016U - A jib front support device of a crane - Google Patents

Abstract

The utility model discloses a sub-boom fore-stock device of hoist, comprising a base plate, a plurality of standard festival framves that are located same plumb line of fixedly connected with directly over the bottom plate are a plurality of bottom plate one end fixedly connected with rotates the tower is kept away from to standard festival frame, rotate on the tower fixed surface be connected with main arm and sub-boom, the sub-boom includes the dead lever, the dead lever is connected with surface fixed on the rotation tower, the dead lever is kept away from and is rotated tower one end and seted up smooth chamber, sliding connection has first extension rod in the smooth chamber, first extension rod is kept away from and is rotated tower one end fixedly connected with counterweight rod, the counterweight rod is kept away from dead lever one end fixedly connected with balancing weight, the sub-boom top is provided with the sub. The utility model discloses can adjust the fly jib length according to the weight of goods to the limit of the weight of lifting by crane that the realization changes the main arm makes the tower crane receive goods to lift by crane limit weight and influences for a short time.

Description

A jib front support device of a crane

technical field

The utility model relates to the technical field of cranes, in particular to a front support device of a jib of a crane.

Background technique

Tower cranes are the most commonly used lifting equipment on construction sites, also known as "tower cranes". Corrugated, concrete, steel pipe and other construction raw materials. The tower crane is an indispensable equipment on the construction site. The function of the tower crane tip is to bear the upper load from the boom rope and the balance arm rope, and directly transmit it to the tower body structure through the turntable through the structural components of the rotating tower, turntable, and bearing seat. The top of the self-elevating tower has For truncated cone column type, forward or backward truncated cone column type, herringbone frame type and inclined support frame type, all upper slewing tower cranes need to be equipped with counterweight, whose function is to support the counterweight to form the design requirements The balancing moment that acts in the opposite direction to the lifting moment. In addition to the counterweight, a hoisting mechanism is often installed at its tail. The reason why the hoisting mechanism is placed at the end of the balance arm together with the counterweight is that it can play a part of the counterweight role, and secondly, it increases the distance between the rope drum and the tower tip guide wheel, so as to facilitate the winding of the wire rope and avoid the occurrence of The rope disorder phenomenon. The amount of balance weight is inversely proportional to the length of the balance arm, and there is a certain proportional relationship between the length of the balance arm and the length of the boom. The balance weight is quite considerable. Light tower cranes generally need at least three to four tons, and heavy tower cranes need nearly 30 tons.

In the traditional technology, in order to balance the special tower crane, a counterweight jib is set at the rear of the crane main boom. In order to reduce wind and save material resistance, the jib is generally set shorter and equipped with a counterweight, but due to the jib The counterweight can only be changed by changing the weight of the counterweight and changing the length of the jib, so after the crane is built, the maximum weight that the main boom can lift is limited. , resulting in low work efficiency.

Utility model content

The purpose of the utility model is to solve the shortcomings existing in the prior art, and proposes a jib front support device of a crane.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a jib front support device of a crane, comprising a base plate, a number of standard sections located on the same vertical line are fixedly connected directly above the base plate, and a number of the standard One end of the segment frame away from the bottom plate is fixedly connected with a rotating tower, the upper surface of the rotating tower is fixedly connected with a main arm and an auxiliary arm, the auxiliary arm includes a fixed rod, the fixed rod is fixedly connected with the upper surface of the rotating tower, and the fixed rod A sliding cavity is opened at one end away from the rotating tower, a first extension rod is slidably connected in the sliding cavity, a counterweight rod is fixedly connected at one end of the first extension rod away from the rotation tower, and the end of the counterweight rod is away from the fixed rod A counterweight is fixedly connected, and a front bracket of the jib is arranged above the jib.

As a further description of the above technical solution:

The top of the rotating tower is fixedly connected with a balance tower, the top of the balance tower is fixedly connected with a first balance steel pipe, and the end of the first balance steel pipe away from the rotation tower is fixedly connected with the top of the end of the main arm away from the rotation tower.

As a further description of the above technical solution:

The upper surface of the counterweight rod is rotatably connected to a limit rod, one end of the limit rod away from the counterweight rod is fixedly connected with a second extension rod, and a second balance steel pipe is rotatably connected to the top of the balance tower. One end port of the two balance steel pipes away from the balance tower is slidably connected with the second extension rod.

As a further description of the above technical solution:

The jib front support includes an arm rod, one end of the arm rod is rotatably connected with the side wall of the fixed rod, and one end of the arm rod away from the fixed rod is rotatably connected with the side wall of the second balance steel pipe, the second balance steel pipe and the arm rod A hydraulic cylinder is rotatably connected between them.

As a further description of the above technical solution:

A hook is slidably connected under the main arm.

As a further description of the above technical solution:

The weight rod, the fixed rod, the first extension rod, the limit rod, the second extension rod, the second balance steel pipe and the arm rod are all made of manganese steel.

The utility model has the following beneficial effects:

The utility model arranges the jib, the front support of the auxiliary wall and the hydraulic cylinder, and the extension and shortening of the hydraulic cylinder can control the front support of the jib to drive the second balance steel pipe to push the counterweight rod to move, so that the jib can be extended or shortened. The extension of the boom will increase the lifting weight limit of the main boom, and at the same time, when the lifting weight is small, the length of the jib will be reduced, and the wind resistance of the jib will be reduced.

The utility model can adjust the length of the jib according to the weight of the cargo, so as to change the limit of the hoisting weight of the main jib, so that the tower crane is less affected by the hoisting limit weight of the cargo.

Description of drawings

Fig. 1 is the front view of the jib front support device of a kind of crane proposed by the utility model;

FIG. 2 is an enlarged view of the position of the jib of a jib front support device of a crane proposed by the utility model.

illustration:

1. Bottom plate; 2. Standard section frame; 3. Rotating tower; 4. Counterweight; 5. Jib; 6. Front support of jib; 7. Balance tower; 8. First balance steel pipe; 9. Hook; 10, main arm; 51, counterweight rod; 52, fixed rod; 53, sliding cavity; 54, first extension rod; 61, second balance steel pipe; 62, hydraulic cylinder; 63, arm rod; 64, limit rod; 65. The second extension rod.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation to the present invention; the terms "first", "second" and "third" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance. In addition, Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Referring to Figures 1-2, an embodiment provided by the present invention: a jib front support device of a crane, comprising a base plate 1, a number of standard section frames 2 located on the same plumb line are fixedly connected directly above the base plate 1, a number of One end of the standard section frame 2 away from the bottom plate 1 is fixedly connected with a rotating tower 3, the upper surface of the rotating tower 3 is fixedly connected with the main arm 10 and the auxiliary arm 5, the auxiliary arm 5 includes a fixed rod 52, and the fixed rod 52 is fixedly connected with the upper surface of the rotating tower 3. One end of the fixed rod 52 away from the rotating tower 3 is provided with a sliding cavity 53, the sliding cavity 53 is slidably connected with a first extension rod 54, and one end of the first extension rod 54 away from the rotation tower 3 is fixedly connected with a counterweight rod 51. One end of the rod 51 away from the fixed rod 52 is fixedly connected with the counterweight 4 , and a jib front bracket 6 is arranged above the jib 5 .

A balance tower 7 is fixedly connected to the top of the rotating tower 3 , and a first balance steel pipe 8 is fixedly connected to the top of the balance tower 7 .

The upper surface of the counterweight rod 51 is rotatably connected to a limit rod 64, and one end of the limit rod 64 away from the counterweight rod 51 is fixedly connected with a second extension rod 65, and a second balance steel pipe 61 is rotatably connected to the top of the balance tower 7, and the second One end port of the balance steel pipe 61 away from the balance tower 7 is slidably connected with the second extension rod 65 .

The front bracket 6 of the jib includes an arm rod 63, one end of the arm rod 63 is rotatably connected with the side wall of the fixed rod 52, and one end of the arm rod 63 away from the fixed rod 52 is rotatably connected with the side wall of the second balance steel pipe 61, the second balance steel pipe 61 and the arm rod A hydraulic cylinder 62 is rotatably connected between 63, and the length of the auxiliary arm 5 can be extended by the hydraulic cylinder 62, so that the force arm is increased. A hook 9 is slidably connected below the main arm 10 . The weight rod 51 , the fixed rod 52 , the first extension rod 54 , the limit rod 64 , the second extension rod 65 , the second balance steel pipe 61 and the arm rod 63 are all made of manganese steel, which has high strength.

Working principle: The device is installed on the ground. When the weight of the goods lifted by the tower crane is greater than the current lifting limit, the hydraulic cylinder 62 is activated, so that the hydraulic cylinder 62 pushes the jib front bracket 6, so that the reaction force of the jib front bracket 6 is equal to The second balance steel pipe 61 makes the second balance steel pipe 61 push the counterweight rod 51 to move away from the rotating tower 3 , thereby increasing the length of the jib 5 and increasing the hoisting limit of the main boom 10 .

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. , it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model, All should be included within the protection scope of the present invention.

Claims (6)

1. A jib front support device of a crane, comprising a base plate (1), characterized in that: a number of standard section frames (2) located on the same vertical line are fixedly connected directly above the base plate (1), and a number of the A rotating tower (3) is fixedly connected to one end of the standard section frame (2) away from the bottom plate (1), the upper surface of the rotating tower (3) is fixedly connected with a main arm (10) and an auxiliary arm (5), and the auxiliary arm ( 5) Including a fixed rod (52), the fixed rod (52) is fixedly connected with the upper surface of the rotating tower (3), and a sliding cavity (53) is opened at one end of the fixed rod (52) away from the rotating tower (3), so A first extension rod (54) is slidably connected in the sliding cavity (53), and a counterweight rod (51) is fixedly connected to one end of the first extension rod (54) away from the rotating tower (3). A counterweight (4) is fixedly connected to one end of the rod (51) away from the fixing rod (52), and a front jib support (6) is arranged above the jib (5). 2 . The jib front support device of a crane according to claim 1 , wherein a balance tower ( 7 ) is fixedly connected to the top of the rotating tower ( 3 ), and the position of the apex of the balance tower ( 7 ) is fixed. 3 . A first balance steel pipe (8) is fixedly connected with the first balance steel pipe (8), and one end of the first balance steel pipe (8) away from the rotating tower (3) is fixedly connected with the top of one end of the main arm (10) away from the rotating tower (3). 3. The jib front support device of a crane according to claim 2, wherein the upper surface of the counterweight rod (51) is rotatably connected to a limit rod (64), and the limit rod (64) A second extension rod (65) is fixedly connected to one end away from the counterweight rod (51), and a second balance steel pipe (61) is rotatably connected to the top of the balance tower (7), and the second balance steel pipe (61) One end port away from the balance tower (7) is slidably connected with the second extension rod (65). 4. The jib front support device of a crane according to claim 1, wherein the jib front support (6) comprises an arm rod (63), and one end of the arm rod (63) is connected to a fixed rod (52) The side wall is rotatably connected, and one end of the arm rod (63) away from the fixed rod (52) is rotatably connected with the side wall of the second balance steel pipe (61), the second balance steel pipe (61) and the arm rod (63) A hydraulic cylinder (62) is rotatably connected therebetween. 5 . The jib front support device of a crane according to claim 1 , wherein a hook ( 9 ) is slidably connected below the main boom ( 10 ). 6 . The jib front support device of a crane according to claim 1, characterized in that: the counterweight rod (51), the fixed rod (52), the first extension rod (54), the limit rod (64), the second extension rod (65), the second balance steel pipe (61) and the arm rod (63) are all made of manganese steel.

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