CN219117029U - Automatic backward tilting prevention device for crawler crane - Google Patents

Abstract

The utility model relates to the technical field of backward tilting prevention of cranes, in particular to an automatic backward tilting prevention device for a crawler crane. The utility model comprises a base, wherein the upper surface of the base is fixedly connected with two limiting pieces, a main arm is rotationally connected between the two limiting pieces, the upper surface of the base is fixedly connected with two auxiliary pieces, an auxiliary arm is fixedly connected between the two auxiliary pieces, an adjusting structure is arranged on the upper surface of the base and close to the space between the two auxiliary pieces, the adjusting structure comprises a plurality of main clamping teeth, one side of each main clamping tooth is fixedly connected with the main arm, the main clamping teeth are uniformly distributed at the lower end of the main arm at intervals, a movable plate is slidingly connected between the two limiting pieces and close to the lower end of the main arm, a plurality of auxiliary clamping teeth are fixedly connected to the surface of the movable plate, and the intervals between the adjacent auxiliary clamping teeth are equal to the intervals between the main clamping teeth. The problem that the existing crane balancing weight cannot move and the crane is prone to overturning when the main arm moves is solved.

Description

Automatic backward tilting prevention device for crawler crane

Technical Field

The utility model relates to the technical field of backward tilting prevention of cranes, in particular to an automatic backward tilting prevention device for a crawler crane.

Background

The crawler crane is provided with a crawler running device which has strong trafficability and a movable arm, and has wide application range.

When the crawler crane works, in order to prevent the driving arm from being overturned due to overlarge pulling force on one side when the driving arm is hoisted, the balancing weights can be placed in the opposite directions so as to balance the forces on two sides.

The Chinese patent with the authorized bulletin number of CN212151403U discloses a crawler crane, which relates to the technical field of hoisting and aims at solving the problem that the switching time between the existing hoisting host and the impact grab is long; the problems that the low-position soil unloading cannot be realized by a single free falling hook, and the construction is not environment-friendly and standard are solved; one end of the movable arm is movably arranged on the revolving body, and the other end of the movable arm is provided with a pulley block; the amplitude-variable winch and the lifting winch are both arranged on the revolving body, and can be used for matching the steel wire rope with the pulley block to complete preset actions.

For example, the applicant found that in the prior art, the weight blocks are fixed at the rear ends of the crawler crane to balance the front and rear end tension, but the weight blocks are generally fixed and cannot move, and when the main boom rotates to or near the horizontal position, the transverse stress of the main boom end is obviously weakened, and the weight of the weight block end is unchanged, so that the crawler crane can overturn backwards, and dangerous situations occur.

Disclosure of Invention

The utility model aims to solve the defects that the existing crane balancing weight cannot move and the crane is easy to topple when a main arm moves in the prior art, and provides an automatic backward tilting prevention device for a crawler crane.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides an automatic anti-backward tilting device for crawler crane, includes the base, the last fixed surface of base is connected with two locating parts, rotates between two locating parts and is connected with the master arm, the last fixed surface of base is connected with two auxiliary parts, two fixedly connected with auxiliary arm between the auxiliary part, the base upper surface is close to being equipped with regulation structure between two auxiliary parts, regulation structure includes a plurality of main latches, one side and the master arm fixed connection of main latch, the even distribution in master arm lower extreme in main latch interval, two between the locating parts and be close to the lower extreme sliding connection of master arm have the fly leaf, the fixed surface of fly leaf is connected with a plurality of vice latches, interval between the adjacent vice latch is equivalent with the interval between the main latch, main latch meshes with vice latch mutually, the upper surface one end fixedly connected with movable balancing weight of fly leaf, one side fixedly connected with extension board that the base is close to the movable balancing weight, the last fixed surface of extension board is connected with fixedly.

The effects achieved by the components are as follows: the main latch is driven to rotate through the rotation of the main arm, and the auxiliary latch matched with the main latch is driven to move, so that the movable plate drives the movable balancing weight to continuously adjust the gravity center of the movable balancing weight, the arm of force of the main arm which continuously moves is followed, the weight of the counterweight at one end of the fixed balancing weight is automatically increased or reduced, and the backward tilting of the crane is effectively prevented.

Preferably, both sides of the movable plate are slidably connected with limiting blocks, and the lower surfaces of the limiting blocks are fixedly connected with the base.

The effects achieved by the components are as follows: the limiting block is used for limiting the movable plate, and when the movable plate slides, the movable plate is positioned, so that the sliding track of the movable plate is unchanged.

Preferably, one end of the movable plate, which is close to the movable balancing weight, is fixedly connected with a stop block, and the section of the stop block is U-shaped.

The effects achieved by the components are as follows: the dog is used for spacing the movable balancing weight that constantly removes, avoids it to fall out the fly leaf, protects the movable balancing weight simultaneously.

Preferably, the surface of the stop block is fixedly connected with a protection pad, and the protection pad is a rubber pad.

The effects achieved by the components are as follows: the rubber pad is mainly used for buffering when contacting the fixed balancing weight, and the fixed balancing weight and the movable balancing weight are prevented from being contacted and collided and vibrated.

Preferably, the lower extreme of extension board is equipped with the bearing structure who is used for supporting the hoist rear end, bearing structure includes the pneumatic cylinder, the output fixedly connected with backup pad of pneumatic cylinder, backup pad and ground contact.

The effects achieved by the components are as follows: when carrying out the jack-up operation, can export the pneumatic cylinder, make the backup pad of its output downwards butt to ground, support extension board and hoist rear end later, make hoist during operation more stable.

Preferably, the hydraulic cylinder is a large hydraulic cylinder, and the stroke of the hydraulic cylinder is shorter.

The effects achieved by the components are as follows: the large hydraulic cylinder can bear larger lifting weight, has short stroke and reduces the risk of side tilting.

Preferably, both sides of backup pad all fixedly connected with extension board, the output arc surface fixedly connected with solid fixed ring of pneumatic cylinder, gu fixed ring's arc surface fixedly connected with bracing piece, the one end and the extension board fixed connection of bracing piece.

The effects achieved by the components are as follows: both sides of backup pad all are fixed with extension board, and extension board and two bracing pieces are used for supporting both sides, increase the side direction holding power, prevent to roll.

Preferably, the lower surfaces of the support plate and the extension plate are fixedly connected with a plurality of anti-slip strips, and the anti-slip strips are uniformly distributed on the lower surfaces of the support plate and the extension plate at intervals.

The effects achieved by the components are as follows: the plurality of cleats are used to increase friction and support upon contact with the ground.

In summary, the beneficial effects of the utility model are as follows:

according to the utility model, when the crane is lifted, the main arm rotates up and down to lift a heavy object, when the main arm rotates downwards, the main arm rotates gradually to a horizontal position by an angle, the stress at the main arm end is increased due to the relative lengthening of the arm, in the process, the main arm rotates to drive the main latch on the lower end surface of the main arm to synchronously do circular shaft motion, and drive the auxiliary latch meshed with the main arm to correspondingly match and move, the auxiliary latch drives the movable plate to push backwards, the movable plate slides backwards under the positioning of the two limiting blocks and drives the movable balancing weight on the surface of the movable plate to move, so that the movable balancing weight moves towards the direction of the fixed balancing weight, the gravity center of the movable balancing weight is continuously moved backwards, the weight at the rear end is continuously increased, the balance of the main arm is stabilized due to the rotation towards the horizontal position, one end of the movable plate is provided with the stop and the protection pad, the movable balancing weight is limited, the movable balancing weight is buffered through the protection pad when the movable balancing weight is contacted, and then when the main arm lifts the object upwards, the auxiliary latch is synchronously rotated along with the main arm, and drives the auxiliary latch and the movable balancing weight to move backwards, so that the movable balancing weight moves towards the direction, and the movable balancing weight is enabled to move towards the fixed balancing weight, and the gravity center of the movable balancing weight is not required to be moved towards the fixed side, and the crane is prevented from being required to move towards the fixed side.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a partial schematic view of an adjustment structure of the present utility model;

FIG. 3 is a schematic diagram showing the positional relationship between a fixed weight and a movable weight according to the present utility model;

FIG. 4 is a schematic view of a support structure of the present utility model;

fig. 5 is a schematic view showing the lower end structures of the extension plate and the support plate according to the present utility model.

Legend description: 1. a base; 2. a limiting piece; 3. a main arm; 4. an auxiliary member; 5. a secondary arm; 6. an adjustment structure; 601. a main latch; 602. a movable plate; 603. auxiliary latch teeth; 604. a movable balancing weight; 605. an extension plate; 606. fixing a balancing weight; 607. a limiting block; 608. a stop block; 609. a protective pad; 7. a support structure; 71. a hydraulic cylinder; 72. a support plate; 73. a lengthening plate; 74. a fixing ring; 75. a support rod; 76. an anti-slip strip.

Detailed Description

Referring to fig. 1, the present utility model provides a technical solution: the utility model provides an automatic anti-backward tilting device for crawler crane, includes base 1, and the upper surface fixedly connected with of base 1 has two locating parts 2, rotates between two locating parts 2 and is connected with master arm 3, and the upper surface fixedly connected with of base 1 has two auxiliary parts 4, fixedly connected with auxiliary arm 5 between two auxiliary parts 4, and the base 1 upper surface is close to being equipped with between two auxiliary parts 4 and adjusts structure 6, and the lower extreme of extension board 605 is equipped with the bearing structure 7 that is used for supporting the hoist rear end.

The specific arrangement and function of the adjustment structure 6 and the support structure 7 will be described in detail below.

Referring to fig. 2 and 3, in the present embodiment: the adjusting structure 6 comprises a plurality of main latches 601, one side of each main latch 601 is fixedly connected with a main arm 3, the main latches 601 are uniformly distributed at the lower end of the main arm 3 at intervals, a movable plate 602 is slidably connected between two limiting parts 2 and close to the lower end of the main arm 3, a plurality of auxiliary latches 603 are fixedly connected to the surface of the movable plate 602, the intervals between the adjacent auxiliary latches 603 are equivalent to the intervals between the main latches 601, the main latches 601 are meshed with the auxiliary latches 603, a movable balancing weight 604 is fixedly connected to one end of the upper surface of the movable plate 602, an extension plate 605 is fixedly connected to one side of the base 1 close to the movable balancing weight 604, and a fixed balancing weight 606 is fixedly connected to the upper surface of the extension plate 605. The main latch 601 is driven to rotate through the rotation of the main arm 3, and the auxiliary latch 603 matched with the main latch is driven to move, so that the movable plate 602 drives the movable balancing weight 604 to continuously adjust the gravity center of the movable balancing weight, the arm of force of the main arm 3 which continuously moves is followed, and the weight of one end of the fixed balancing weight 606 is automatically increased or reduced, so that the backward tilting of the crane is effectively prevented.

In addition, both sides of the movable plate 602 are slidably connected with a limiting block 607, and the lower surface of the limiting block 607 is fixedly connected with the base 1. The limiting block 607 is used for limiting the movable plate 602, and positioning the movable plate 602 when sliding, so that the sliding track is unchanged. One end of the movable plate 602, which is close to the movable balancing weight 604, is fixedly connected with a stop block 608, the cross section of the stop block 608 is U-shaped, the surface of the stop block 608 is fixedly connected with a protection pad 609, and the protection pad 609 is a rubber pad. The stop block 608 is used for limiting the continuously moving movable counterweight 604, preventing the movable counterweight 604 from falling out of the movable plate 602, and protecting the movable counterweight 604.

Referring to fig. 4 and 5, in the present embodiment: the supporting structure 7 comprises a hydraulic cylinder 71, the hydraulic cylinder 71 is a large-sized hydraulic cylinder, the stroke is short, the output end of the hydraulic cylinder 71 is fixedly connected with a supporting plate 72, and the supporting plate 72 is in contact with the ground. When the crane is in operation, the hydraulic cylinder 71 can be output, the support plate 72 at the output end of the hydraulic cylinder is enabled to be in downward contact with the ground, and then the extension plate 605 and the rear end of the crane are supported, so that the crane is more stable in operation.

Wherein, both sides of backup pad 72 all fixedly connected with extension board 73, the output arc surface fixedly connected with solid fixed ring 74 of pneumatic cylinder 71, the arc surface fixedly connected with bracing piece 75 of solid fixed ring 74, the one end and the extension board 73 fixed connection of bracing piece 75. The extension plates 73 are fixed to both sides of the support plate 72, and the extension plates 73 and the two support rods 75 are used for supporting both sides, increasing lateral support force and preventing side tilting. The lower surfaces of the support plate 72 and the extension plate 73 are fixedly connected with a plurality of anti-slip strips 76, and the anti-slip strips 76 are uniformly distributed on the lower surfaces of the support plate 72 and the extension plate 73 at intervals. The plurality of cleats 76 serve to increase friction and support upon contact with the ground.

The main arm 3 rotates to drive the main latch 601 on the lower end surface of the main arm 3 to synchronously do circular axis motion in the process, and drives the auxiliary latch 603 meshed with the main arm 3 to correspondingly match and move, the auxiliary latch 603 drives the movable plate 602 to push backwards, the movable plate 602 slides backwards under the positioning of the two limiting blocks 607 and drives the movable counter weight 604 on the surface of the movable plate to move backwards, so that the movable counter weight 604 moves towards the direction of the fixed counter weight 606, the gravity center of the movable counter weight 604 continuously moves backwards, the weight of the rear end continuously increases, the main arm 3 is further stabilized to be balanced by rotating towards the horizontal position, one end of the movable plate 602 is provided with a stop block 608 and a protection pad 609, the movable counter weight 604 is limited by contacting and simultaneously, the protection pad 609 is used for buffering, and then the main latch 602 rotates upwards after the main arm 3 lifts an object, the movable counter weight 604 is driven to move backwards, the movable counter weight 604 moves towards the direction of the fixed counter weight 606, the gravity center of gravity of the movable counter weight 604 is further is prevented from continuously moving backwards, and the movable counter weight 602 is prevented from moving backwards, and the movable counter weight 602 is further prevented from moving towards one side of the fixed counter weight 602.

When the crane performs lifting operation, the hydraulic cylinder 71 at the lower end of the extension plate 605 is pushed downwards to drive the support plate 72 at the output end to be in downward contact with the ground, meanwhile, the extension plates 73 at the two sides of the support plate 72 are in contact with the ground, the lower surfaces of the support plate 72 and the extension plates 73 are respectively provided with an anti-slip strip 76 for increasing friction force and stabilizing support, and meanwhile, the arrangement of the extension plates 73 is used for enhancing lateral supporting force at two sides, and the extension plates 73 are supported by the support rods 75, so that the rear end of the crane is stabilized when the crane performs lifting operation, backward tilting is prevented, and when the crane needs to rotate at an angle, the hydraulic cylinder 71 is retracted, and after rotating at an angle, the crane is downwards output to be supported.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

Claims (8)

1. Automatic backward tilting prevention device for crawler crane, comprising a base (1), characterized in that: the utility model discloses a base, including base (1) and auxiliary member (4), two locating parts (2) are fixed on the upper surface of base (1), rotate between two locating parts (2) and be connected with main arm (3), the upper surface of base (1) is fixed on two auxiliary member (4), two fixedly connected with auxiliary arm (5) between auxiliary member (4), be equipped with between base (1) upper surface and be close to two auxiliary member (4) and adjust structure (6), adjust structure (6) include a plurality of main latch (601), one side and main arm (3) fixed connection of main latch (601), main latch (601) interval evenly distributed is in main arm (3) lower extreme, two between locating part (2) and be close to the lower extreme sliding connection of main arm (3) have fly leaf (602), the fixed surface of fly leaf (602) is connected with a plurality of auxiliary latch (603), adjacent interval between auxiliary latch (603) is equivalent with the interval between main latch (601), one side that is close to fly leaf (605) of fly leaf (604) is connected with on the fixed surface (604) of fly leaf (605), the upper surface of extension board (605) fixedly connected with fixed balancing weight (606).

2. An automatic anti-recline device for a crawler crane according to claim 1, wherein: both sides of fly leaf (602) all sliding connection has stopper (607), the lower surface and the base (1) fixed connection of stopper (607).

3. An automatic anti-recline device for a crawler crane according to claim 1, wherein: one end of the movable plate (602) close to the movable balancing weight (604) is fixedly connected with a stop block (608), and the section of the stop block (608) is U-shaped.

4. An automatic anti-recline device for a crawler crane according to claim 3, wherein: the surface of the stop block (608) is fixedly connected with a protection pad (609), and the protection pad (609) is a rubber pad.

5. An automatic anti-recline device for a crawler crane according to claim 1, wherein: the lower extreme of extension board (605) is equipped with bearing structure (7) that are used for supporting the hoist rear end, bearing structure (7) include pneumatic cylinder (71), the upper end and the extension board (605) fixed connection of pneumatic cylinder (71), the output fixedly connected with backup pad (72) of pneumatic cylinder (71), backup pad (72) and ground contact.

6. An automatic anti-recline device for a crawler crane according to claim 5, wherein: the hydraulic cylinder (71) is a large hydraulic cylinder, and the stroke of the hydraulic cylinder is short.

7. An automatic anti-recline device for a crawler crane according to claim 5, wherein: both sides of backup pad (72) are all fixedly connected with extension board (73), the output arc surface fixedly connected with solid fixed ring (74) of pneumatic cylinder (71), the arc surface fixedly connected with bracing piece (75) of solid fixed ring (74), the one end and the extension board (73) fixed connection of bracing piece (75).

8. An automatic anti-recline device for a crawler crane according to claim 5, wherein: the lower surfaces of the support plate (72) and the lengthening plate (73) are fixedly connected with a plurality of anti-slip strips (76), and the anti-slip strips (76) are uniformly distributed on the lower surfaces of the support plate (72) and the lengthening plate (73) at intervals.

Images