Displacement counterweight device of crane

Abstract

The utility model discloses a crane displacement counterweight device which comprises a rotary table connected to a crane slewing bearing and a counterweight block connected to the tail end of the rotary table, the tail end of the rotary table is connected with a telescopic cylinder, a telescopic rod of the telescopic cylinder extends horizontally, the outer end of the telescopic rod is fixedly connected with the inner end of the counterweight block, and a horizontal slide way is arranged at the top end of the counterweight block. The axis of the horizontal slide way is parallel to the axis of a telescopic rod of the telescopic cylinder, a sliding strip is connected to the bottom of the tail end of the rotary table, the tail end of the rotary table is supported at the top end of the balancing weight, and the sliding strip is embedded into the horizontal slide way of the balancing weight. The large balance moment requirement of the balance weight is met, and meanwhile the trafficability of a vehicle and the requirement for narrow operation are not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a crane position-changing counterweight device. Background Art

[0002] Cranes are increasingly used in daily life. To ensure full omnidirectional lifting, counterweights are often added to the rear of the crane's turntable. As a balancing device during crane lifting, the counterweight balances the torque. The greater the distance between the counterweight and the center of the slewing bearing, the greater the balancing torque, and the greater the crane's long-distance lifting capacity. Existing cranes have the following drawbacks during lifting operations: 1. Counterweights are often bolted on at a fixed distance from the slewing bearing center, which prevents the crane from fully utilizing its lifting capacity. 2. When the counterweight is positioned far from the slewing center, it affects vehicle length and turning radius, hindering vehicle passability and operations in confined spaces. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a crane position-shifting counterweight device, which can move and position the counterweight according to actual use needs, thereby solving the demand for a larger balancing torque of the counterweight without affecting the vehicle's passability and the needs of narrow operations.

[0004] The technical solution of the utility model is:

[0005] A crane position-changing counterweight device comprises a turntable connected to the crane's slewing support and a counterweight block connected to the tail end of the turntable, the tail end of the turntable being connected to a telescopic cylinder, the telescopic rod of the telescopic cylinder extending horizontally and the outer end being fixedly connected to the inner end of the counterweight block, the top end of the counterweight block being provided with a horizontal slide, the axis of the horizontal slide being parallel to the axis of the telescopic rod of the telescopic cylinder, a slide bar being connected to the bottom of the tail end of the turntable, the tail end of the turntable being supported on the top end of the counterweight block and the slide bar being embedded in the horizontal slide of the counterweight block.

[0006] A U-shaped positioning groove is provided at the top of the counterweight block, and the bottom of the turntable tail end is placed in the U-shaped positioning groove. Horizontal slides are provided on both groove walls of the U-shaped positioning groove. The turntable tail end extends into the U-shaped positioning groove and is provided with sliding strips on the side walls facing the two horizontal slides. The two sliding strips are respectively embedded in the corresponding horizontal slides.

[0007] A connecting plate is vertically provided on the top of the counterweight block and on the parts on both sides of the U-shaped positioning groove. The two connecting plates are parallel to each other and are provided with a row of connecting holes. The tail end of the turntable is connected to the two side walls outside the U-shaped positioning groove with vertically arranged positioning plates. The two positioning plates are provided with positioning holes. The outer walls of the two positioning plates are respectively close to the inner walls of the two connecting plates. When the counterweight block is moved to position, the fastening bolts pass through the connecting holes of the connecting plate and the positioning holes of the positioning plate and are locked and connected by locking nuts, so that the counterweight block is fixedly connected to the tail end of the turntable.

[0008] An articulated seat is provided on the inner end of the counterweight block, and the outer end of the telescopic rod of the telescopic cylinder is hinged on the articulated seat.

[0009] The telescopic cylinder is an electric telescopic cylinder or a telescopic hydraulic cylinder.

[0010] Advantages of this utility model:

[0011] (1) The counterweight of the utility model can be driven and positioned by a telescopic cylinder. When the counterweight needs a larger balancing torque, the counterweight can be moved away from the center of the slewing support to increase the balancing torque and give full play to the long-distance lifting capacity of the crane; when in order to achieve vehicle passability and operation in a narrow space, the counterweight is moved toward the center of the slewing support.

[0012] (2) The bottom of the tail end of the turntable of the utility model is placed in the U-shaped positioning groove at the top end of the counterweight block, which limits the tail end of the turntable and ensures its stability during movement.

[0013] (3) The utility model adopts a connecting plate and a positioning plate to position and connect the counterweight block, thereby ensuring the stability and safety of the counterweight block when the crane is operating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the present utility model.

[0015] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0016] Figure numerals: 1-slewing bearing, 2-turntable, 3-counterweight, 4-telescopic cylinder, 5-articulated seat, 6-U-shaped positioning groove, 7-horizontal slide, 8-slide bar, 9-connecting plate, 10-positioning plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See Figure 1 and Figure 2 A crane position-changing counterweight device comprises a turntable 2 connected to a slewing bearing 1 of the crane and a counterweight block 3 connected to the tail end of the turntable 2. The tail end of the turntable 2 is connected to a telescopic oil cylinder 4. The telescopic rod of the telescopic oil cylinder 4 extends horizontally. A hinge seat 5 is provided on the inner end of the counterweight block 3. The outer end of the telescopic rod is hinged on the hinge seat 5. A U-shaped positioning groove 6 is provided on the top end of the counterweight block 3. The bottom of the tail end of the turntable 2 is placed in the U-shaped positioning groove 6. Horizontal slides 7 are provided on both groove walls of the U-shaped positioning groove 6. The tail end of the turntable 2 extends into the U-shaped positioning groove 6 and is provided with slide bars 8 on the side walls facing the two horizontal slides 7. The two slide bars 8 are respectively embedded in the corresponding horizontal slides 7.

[0019] A connecting plate 9 is vertically provided on the top of the counterweight block 3 and on both sides of the U-shaped positioning groove 6. The two connecting plates 9 are parallel to each other and are provided with a row of connecting holes. The tail end of the turntable 2 is located on the two side walls outside the U-shaped positioning groove 6 and is connected with a vertically arranged positioning plate 10. The two positioning plates 10 are provided with positioning holes. The outer walls of the two positioning plates 10 are respectively close to the inner walls of the two connecting plates 9. When the counterweight block 3 is moved to position, the fastening bolts pass through the connecting holes of the connecting plate 9 and the positioning holes of the positioning plate 10 and are locked and connected by locking nuts, so that the counterweight block 3 is fixedly connected to the tail end of the turntable 2.

[0020] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane counterweight device comprising a turntable connected to a slewing bearing of the crane and a counterweight connected to the tail end of the turntable, characterized in that: The tail end of the turntable is connected to a telescopic cylinder, the telescopic rod of the telescopic cylinder extends horizontally and the outer end is fixedly connected to the inner end of the counterweight block, the top of the counterweight block is provided with a horizontal slide, the axis of the horizontal slide is parallel to the axis of the telescopic rod of the telescopic cylinder, and a slide bar is connected to the bottom of the tail end of the turntable. The tail end of the turntable is supported on the top of the counterweight block and the slide bar is embedded in the horizontal slide of the counterweight block.

2. A crane shifting counterweight device according to claim 1, characterized in that: A U-shaped positioning groove is provided at the top of the counterweight block, and the bottom of the turntable tail end is placed in the U-shaped positioning groove. Horizontal slides are provided on both groove walls of the U-shaped positioning groove. The turntable tail end extends into the U-shaped positioning groove and is provided with sliding strips on the side walls facing the two horizontal slides. The two sliding strips are respectively embedded in the corresponding horizontal slides.

3. The crane counterweight device according to claim 2, characterized in that: A connecting plate is vertically provided on the top of the counterweight block and on the parts on both sides of the U-shaped positioning groove. The two connecting plates are parallel to each other and are provided with a row of connecting holes. The tail end of the turntable is connected to the two side walls outside the U-shaped positioning groove with vertically arranged positioning plates. The two positioning plates are provided with positioning holes. The outer walls of the two positioning plates are respectively close to the inner walls of the two connecting plates. When the counterweight block is moved to position, the fastening bolts pass through the connecting holes of the connecting plate and the positioning holes of the positioning plate and are locked and connected by locking nuts, so that the counterweight block is fixedly connected to the tail end of the turntable.

4. The crane shifting counterweight device according to claim 1, characterized in that: An articulated seat is provided on the inner end of the counterweight block, and the outer end of the telescopic rod of the telescopic cylinder is hinged on the articulated seat.

5. The crane position-shifting counterweight device according to claim 1, characterized in that: The telescopic cylinder is an electric telescopic cylinder or a telescopic hydraulic cylinder.

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