CN110697586A - A low-altitude crane - Google Patents

Abstract

The invention relates to the technical field of cranes, and specifically discloses a low-altitude crane, comprising a base assembly, a tail leg assembly is connected to the left side of the base assembly, and a tail leg assembly is provided at the right end of the tail leg assembly There is a telescopic leg assembly, a slewing bearing is fixed on the telescopic leg assembly, a middle column is connected to the slewing support, the top of the middle column is connected with an operating table, and the middle column is connected with the first connecting rod and the first connecting rod. The second connecting rods are connected together, and the first connecting rod is located below the console, the second connecting rod is connected to the center column, and the second connecting rod is located above the first connecting rod; Independent hydraulic station, powered by electric motor, reduces the cost of the chassis; it can freely enter and exit most warehouses, basements and other low spaces for operation; forklift fork handling holes are left on all sides of the platform at the bottom of the crane, and the luffing cylinder adopts a connecting rod structure to increase torque.

Description

A low-altitude crane

technical field

The invention relates to the technical field of cranes, in particular to a low-altitude crane.

Background technique

Crane is the common name of crane, which is widely used in a series of heavy industrial products such as ships, equipment, machinery, molds, etc. The power device is composed of electric motor, reducer, clutch, brake, rope drum and wire rope. The motor is a near-magnetic single-phase capacitor motor, which is designed with a braking mechanism when power is cut off; the motor is also equipped with a thermal switch to prevent the motor from being overheated and burned; the reducer is a two-stage gear deceleration, which is fixed to the motor; clutch, The brake is integrated with the rope drum, but when the clutch is disengaged, it can achieve rapid descent, and operating the brake can control the descending speed to avoid shock. The round hole on the front of the power unit housing can be used to install the blower, and the user can equip the blower for forced cooling as needed.

The main equipment of the existing low-altitude crane is the crawler crane. First, the crawler crane is limited by its own characteristics and the boom is short. Second, the existing low-altitude crane has a light lifting capacity. Third, the existing low-altitude crane has a complete vehicle. Too many units are too bulky to transport.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a low-altitude crane to solve the problems of the existing low-altitude crane crawler crane which is limited by its own characteristics, short boom and light lifting, as proposed in the above background art.

To achieve the above object, the present invention provides the following technical solutions:

A low-altitude crane includes a base assembly, a tail leg assembly is connected to the left side of the base assembly, a telescopic leg assembly is disposed at the right end of the tail leg assembly, and the telescopic leg assembly is disposed. A slewing bearing is fixed on the structure, a middle column is connected to the slewing bearing, the top of the middle column is connected with an operating table, the middle column is connected with the first connecting rod and the second connecting rod, and the The first link is located below the console, and the second link is located above the first link.

As a further solution of the present invention: the base assembly and the tail leg assembly are connected by pins.

As a further solution of the present invention: a square fixing box is welded at the installation place of the telescopic leg assembly, the telescopic leg assembly is reduced in size and embedded in the fixing box, and the two ends of the horizontal oil cylinder in the telescopic leg assembly are respectively fixed to the fixed box by positioning pins. On the mounting seat of the base fixing box and the telescopic leg assembly.

As a further solution of the present invention: the first connecting rod is connected with the center column through a first pin, and a basic arm is connected at the top of the center column through a second pin, and the other end of the first connecting rod is connected with a fourth pin The shaft is connected with a luffing cylinder, the right end of the luffing cylinder is connected with the basic arm through the fifth pin, the second connecting rod is connected with the basic arm through the third pin, and the other end is connected with the luffing cylinder through the fourth pin .

As a further solution of the present invention, the accessories on the base assembly are fixed on the base assembly by bolts, and the base assembly and the inner ring hole of the slewing bearing are fixed by bolts.

As a further solution of the present invention: the central column and the outer ring of the slewing bearing are connected by bolts.

As a further solution of the present invention: the basic arm is provided with a first telescopic oil cylinder, the first telescopic arm is provided with a second telescopic oil cylinder, the second telescopic arm is provided with a third telescopic oil cylinder, and the third telescopic arm is provided with a fourth telescopic oil cylinder The oil cylinder is fixed by positioning pins, and the lifting lugs are fixed by pressing plates by screws.

As a further solution of the present invention, a first telescopic arm, a second telescopic arm, a third telescopic arm and a fourth telescopic arm are arranged in parallel on the bottom right side of the basic arm, respectively.

As a further solution of the present invention, a fuel tank is arranged behind the center column and is fixed on the base assembly.

Compared with the prior art, the beneficial effects of the present invention are:

The new model adopts an independent hydraulic station, and the power adopts the electric motor, which reduces the cost of the chassis; the height of the whole vehicle is 2.5 meters, the width of 2.2 meters, and the length of 4.2 meters, which can freely enter and exit most warehouses, basements and other low spaces; There are fork handling holes for forklifts, which can be transported by forklifts; the luffing cylinder adopts a connecting rod structure to increase the torque. After testing, the lifting torque reaches 460KN.m, and the full boom length can reach 12 meters; the crane itself is Counterweight, no counterweight is required for hoisting light, and suitable counterweight can be added to the rear of the platform for hoisting.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. some examples.

Fig. 1 is the front schematic diagram of the present invention;

Fig. 2 is the schematic diagram of the back of the present invention;

Figure 3 is a schematic top view of the present invention.

In the picture: 1- Tail leg assembly, 2- Telescopic leg assembly, 3- Base assembly, 4- Slewing bearing, 5- Center column, 6- Operation table, 7- First pin, 8- Second pin Shaft, 9-third pin, 10-first link, 11-second link, 12-fourth pin, 13-luffing cylinder, 14-fifth pin, 15-basic arm, 16- The first telescopic arm, 17-the second telescopic arm, 18-the third telescopic arm, 19-the fourth telescopic arm, 20-the first telescopic cylinder, 21-the second telescopic cylinder, 22-the third telescopic cylinder, 23-the first telescopic cylinder Four telescopic cylinders and 24-oil tank.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

1-3, in one embodiment of the present invention, a low-altitude crane includes a base assembly 3, and a tail leg assembly 1 is connected to the left side of the base assembly 3. The tail leg The right end of the assembly 1 is provided with a telescopic leg assembly 2, a slewing bearing 4 is fixed on the telescopic leg assembly 2, and a middle column 5 is connected to the slewing bearing 4, and the top of the middle column 5 is arranged. The console 6 is connected, the center column 5 is connected with the first link 10 and the second link 11, and the first link 10 is located under the console 6, and the second link 11 above the first link 10 .

Further, in the embodiment of the present invention, the base assembly 3 and the tail leg assembly 1 are connected by a pin shaft, so that the tail leg can be manually rotated by 90°.

Further, in the embodiment of the present invention, a square fixed box is welded at the installation place of the telescopic leg assembly 2, the telescopic leg assembly 2 is reduced in size and embedded in the fixed box, and the two ends of the horizontal oil cylinder in the telescopic leg assembly 2 are They are respectively fixed on the base fixing box and the mounting seat of the telescopic leg assembly 2 through positioning pins, and the horizontal oil cylinder expands and contracts to drive the telescopic legs to expand and contract.

Further, in the embodiment of the present invention, the first connecting rod 10 is connected to the center column 5 through a first pin 7, and a basic arm 15 is connected to the top of the center column 5 through a second pin 8. The first The other end of the connecting rod 10 is connected with the luffing cylinder 13 through the fourth pin 12 , the right end of the luffing cylinder 13 is connected with the basic arm 15 through the fifth pin 14 , and the second connecting rod 11 is connected with the third pin 9 . The basic arm 15 is connected, and the other end thereof is connected with the luffing cylinder 13 through the fourth pin 12, so that the adjustability between the components is high.

Further, in the embodiment of the present invention, the accessories on the base assembly 3 are fixed on the base assembly 3 by bolts, and the base assembly 3 and the inner ring hole of the slewing bearing 4 are fixed by bolts to make the connection more secure. .

Further, in the embodiment of the present invention, the central column 5 and the outer ring of the slewing bearing 4 are connected by bolts, which is convenient for installation and disassembly.

Further, in the embodiment of the present invention, the basic arm 15 is provided with a first telescopic oil cylinder 20 , the first telescopic arm is provided with a second telescopic oil cylinder 21 , the second telescopic arm is provided with a third telescopic oil cylinder 22 , a third telescopic oil cylinder 22 There is a fourth telescopic oil cylinder 23 on the telescopic arm, which is fixed by positioning pins, and the lifting lugs are fixed by pressing plates by screws, so that the positioning of the components is more accurate.

Further, in the embodiment of the present invention, a first telescopic arm 16 , a second telescopic arm 17 , a third telescopic arm 18 and a fourth telescopic arm 19 are arranged on the bottom right side of the basic arm 15 in parallel, so as to facilitate lifting The device is fixed and works simultaneously.

Further, in the embodiment of the present invention, an oil tank 24 is provided behind the center column 5 and fixed on the base assembly 3 to facilitate the oil supply of the oil cylinder.

Working principle: The crane reaches the designated position, the power distribution box is turned on, the motor starts, and the oil pump is driven to work, and the system obtains pressure oil. When not working, the oil is returned to the fuel tank from the neutral position of the three-way valve; the three-way valve is switched to boarding, and the luffing cylinder, the telescopic cylinder and the rotating motor are respectively controlled by the three-way multi-way valve to realize the crane luffing angle, the boom telescopic and the center column above. Part of the rotation movement, through the combination of various actions to achieve hoisting operation; the three-way valve is switched to get off, and the outrigger multi-way valve controls the vertical cylinder expansion and contraction of the tail leg respectively, and the front and rear outriggers realize horizontal expansion and vertical expansion. When hoisting, first open the telescopic outriggers of the lower part, and extend the vertical cylinder to maintain a large span, so that the upper part is stable and reliable.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The standard parts used in the present invention can all be purchased from the market, the special-shaped parts can be customized according to the description in the description and the drawings, and the specific connection methods of each part can adopt mature bolts, rivets, welding in the prior art. and other conventional means, which will not be described in detail here.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (9)

1. A low-altitude crane, comprising a base assembly (3), characterized in that a tail leg assembly (1) is connected to the left side of the base assembly (3), and the tail leg assembly (1). ) is provided with a telescopic leg assembly (2) at the right end point of the , the top of the middle column (5) is connected with the operating table (6), the middle column (5) is connected with the first connecting rod (10) and the second connecting rod (11), and the first connecting rod (10) is connected with the second connecting rod (11). The connecting rod (10) is located below the operating table (6), and the second connecting rod (11) is located above the first connecting rod (10). 2 . The low-altitude crane according to claim 1 , wherein the base assembly ( 3 ) and the tail leg assembly ( 1 ) are connected by pins. 3 . 3. A low-altitude crane according to claim 1, characterized in that, a square fixing box is welded at the installation place of the telescopic leg assembly (2), and the telescopic leg assembly (2) is reduced in size and embedded in the fixing box Inside, the two ends of the horizontal oil cylinder in the telescopic leg assembly (2) are respectively fixed on the base fixing box and the mounting seat of the telescopic leg assembly (2) through positioning pins. 4. A low-altitude crane according to claim 1, characterized in that, the first connecting rod (10) is connected to the central column (5) through the first pin (7), and is connected to the central column (5) ) is connected with the basic arm (15) through the second pin (8), the other end of the first connecting rod (10) is connected with the luffing cylinder (13) through the fourth pin (12), and the luffing cylinder ( The right end of 13) is connected with the basic arm (15) through the fifth pin (14), and the second link (11) is connected with the basic arm (15) through the third pin (9), and the other end is connected with the fourth The pin shaft (12) is connected with the luffing oil cylinder (13). 5. A low-altitude crane according to claim 1, wherein the accessories on the base assembly (3) are fixed on the base assembly (3) by bolts, and the base assembly (3) and The inner ring hole of the slewing bearing (4) is fixed by bolts. 6 . The low-altitude crane according to claim 1 , wherein the central column ( 5 ) and the outer ring of the slewing bearing ( 4 ) are connected by bolts. 7 . 7. A low-altitude crane according to claim 4, characterized in that a first telescopic oil cylinder (20) is arranged on the basic arm (15), and a second telescopic oil cylinder (21) is arranged on the first telescopic arm The second telescopic arm is provided with a third telescopic oil cylinder (22), and the third telescopic arm is provided with a fourth telescopic oil cylinder (23), which are fixed by positioning pins, and the lifting ears are fixed by pressing plates by screws. 8. A low-altitude crane according to claim 4 or 7, characterized in that a first telescopic arm (16) and a second telescopic arm (17) are arranged in parallel at the bottom of the right side of the basic arm (15), respectively. ), the third telescopic arm (18) and the fourth telescopic arm (19). 9 . The low-altitude crane according to claim 1 , wherein an oil tank ( 24 ) is arranged behind the central column ( 5 ) and is fixed on the base assembly ( 3 ). 10 .

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