CN207713311U - A kind of narrow space telescopic crane boom - Google Patents

Abstract

The utility model discloses a kind of narrow space telescopic crane booms, crane technical field, including joint arm one, joint arm two, joint arm three, joint arm four, joint arm five and turntable, the turntable is fixed on crane frame, the turntable top is hinged joint arm one, side articulated telescopic oil cylinder, the telescopic oil cylinder top are hinged with one middle part bottom end of the joint arm；The crane drag-line characteristics of compact layout runs quick and stable, improves the flexible efficiency of telescopic arm, reduces working strength, greatly improves telescopic arm whole service life.

Description

Telescopic arm of crane in narrow space

technical field

The utility model relates to the technical field of cranes, in particular to a telescopic arm of a crane in a narrow space.

Background technique

As a kind of engineering machinery, cranes are widely used in municipal construction, real estate development, road traffic, water conservancy and electric power, petrochemical, mining and metallurgical construction projects. The crane uses the diesel engine as the driving force to drive the hydraulic pump to make the hydraulic oil have hydraulic energy. The hydraulic oil with hydraulic energy pushes the luffing hydraulic cylinder piston to move to change the amplitude of the boom, and drives the hydraulic motor to rotate and wind the steel rope to lift objects to realize the lifting function. The performance of the crane lifting objects mainly depends on the anti-overturning stability of the crane. Cranes in narrow spaces also play an important role in the maintenance and installation of electrical equipment in substations, the maintenance and installation of equipment in mechanized chemical workshops, and the use of glass curtain walls in narrow spaces. The telescopic arm is the most important part of the crane to ensure the smooth operation of the telescopic arm. very important.

Chinese patent announcement number CN 205346688 U discloses a telescopic arm with two cylinders and two sets of cables for a truck-mounted crane, including a basic arm and a first telescopic boom, a second telescopic boom, and a third telescopic boom installed on the basic boom. And the fourth telescopic arm, the first telescopic arm is equipped with the first telescopic oil cylinder, the second telescopic arm is equipped with the second telescopic oil cylinder, the first telescopic arm and the second telescopic arm are pressed together with the first telescopic oil cylinder and the second telescopic oil cylinder Sequential expansion and contraction, the second telescopic arm follows, the third telescopic arm follows, and the fourth telescopic arm follows the second telescopic oil cylinder through stretching out cables, rope rows and recovery zippers synchronously. The piston rod head of the first telescopic oil cylinder is fixed on the arm tail of the basic arm by a pin shaft, and the cylinder body is fixed on the arm tail of the first joint telescopic arm by a pin shaft. The utility model is a double cylinder with two sets of pull cable telescopic mechanisms, which has a compact structure, reduces the cumbersome winding mode of the wire rope, and makes full use of the inner space of the boom. In this utility model, pulley is fixed on the arm head of the third joint telescopic arm, and the used wire rope of the whole drag cable telescopic mechanism is longer, which affects the stress of the telescopic arm.

Chinese patent announcement number CN205346687U discloses a telescopic boom for a truck-mounted crane with built-in three hydraulic cylinders, including a basic boom, a five-section telescopic boom, three telescopic oil cylinders, a telescopic cable, a recovery cable, a rope row and a movable pulley, and a five-section telescopic boom. Stacked in the basic arm, the first, second and third telescopic cylinders are arranged vertically from top to bottom in the five-section telescopic boom. The expansion and contraction of the first, second and third telescopic booms are respectively controlled by the first telescopic cylinder and the second telescopic cylinder The telescopic action of the oil cylinder and the third telescopic oil cylinder; through the cooperation of the third telescopic oil cylinder, the telescopic cable, the recovery cable, the rope row and the movable pulley, a telescopic mechanism with multiple sets of cables is formed in the oil cylinder, so that the telescopic arm of the fourth section, the telescopic arm of the first section The five-section telescopic boom is controlled by the expansion and contraction of the third-section telescopic boom, and is guaranteed to keep synchronous expansion and contraction with the third-section telescopic boom. The beneficial effects are: the structure is simple and compact, and the telescopic operation efficiency of the arm body is improved; however, the pulley is arranged on the front side of the post bracket in the utility model, and the left and right sides of the head of the second telescopic oil cylinder and both sides of the tail of the third telescopic oil cylinder are also uniform. The pulley is set, and the zipper mechanism is relatively complicated, which is easy to cause the wire rope to be entangled.

Utility model content

In view of this, the purpose of this utility model is to address the deficiencies of the prior art, to provide a telescopic arm of a crane in a narrow space, the cables are arranged compactly, the operation is fast and stable, the telescopic efficiency of the telescopic arm is improved, the working intensity is reduced, and the telescopic arm is greatly improved. The overall service life of the arm.

In order to achieve the above object, the utility model adopts the following technical solutions:

A telescopic boom of a crane in a narrow space, comprising joint arm 1, joint arm 2, joint arm 3, joint arm 4, joint arm 5 and a turntable, the turntable is fixed on the crane frame, and the top of the turntable is hinged to joint arm 1, The side end is hinged telescopic oil cylinder, and the top end of the telescopic oil cylinder is hinged with the bottom end of the middle part of the joint arm;

A first-stage telescopic cylinder is arranged in the joint arm one, the piston rod of the first-stage telescopic cylinder is fixed at the tail of the joint arm one, and the cylinder barrel of the first-stage telescopic cylinder is fixed at the tail of the joint arm two;

A secondary telescopic cylinder is arranged in the second arm, the piston rod of the secondary telescopic cylinder is fixed at the tail of the second arm, and the cylinder barrel of the secondary telescopic cylinder is fixed at the tail of the third arm;

Pulley 1 is arranged on the top of the secondary telescopic cylinder, and a first-stage outrigger cable is fixed on the inner side of the tail of the joint arm 2, and one end of the first-stage outrigger cable bypassing the pulley 1 is fixed at the end of the joint arm 4. The inner side of the tail; the second pulley is fixed on the outer side of the tail of the joint arm three, the first-level retractable arm cable is fixed on the inner side of the top of the joint arm two, and one end of the first-level retractable arm cable bypasses the second pulley The outer side of the tail of the fourth arm;

The pulley three is fixed on the inside of the top of the joint arm four, and the second-level outrigger cable is fixed on the outside of the tail of the joint arm five, and one end of the second-level outrigger cable bypassing the pulley three is fixed at the tail of the joint arm three inside;

The cross section of the joint arm one is a pentagonal structure.

Further, the piston rods in the first-stage telescopic cylinder and the second-stage telescopic cylinder are nickel-chromium double-coated piston rods.

Further, the cylinder barrel of the telescopic oil cylinder is hinged to the side end of the turntable, and the piston rod of the telescopic oil cylinder is hinged to the bottom end of a middle part of the joint arm.

Further, the included angle at the top of the cross section of the joint arm one is 170°.

The beneficial effects of the utility model are:

1. The utility model discloses a telescopic arm of a crane in a narrow space, wherein the turntable is fixed on the crane frame, and the turntable is a crane turning mechanism, which adopts an integral turning reduction mechanism, and the internal worm gear is fully enclosed in the shell, which can realize 0-360 ° rotation, the top of the turntable is hinged to the joint arm one, and the side end is hinged to the telescopic oil cylinder, that is, the cylinder barrel of the telescopic oil cylinder is hinged to the side end of the turntable, and the piston rod of the telescopic oil cylinder is hinged to the bottom end of the middle part of the joint arm. Therefore, by controlling the expansion and contraction of the telescopic oil cylinder, the It can control the lifting angle of the joint arm one.

2. The telescopic arm adopts the structure of one fixed section (arm 1), four telescopic sections (arm 2, arm 3, arm 4, arm 5), and two oil cylinders (one-stage telescopic Cylinder, two-stage telescopic cylinder) and two sets of extension cables and one set of retraction cables to control the operation, the first section of the boom is lifted within the range of 0-75°, the second section of the boom is driven by 2 separate oil cylinders, and the rest is pulled by the cable mechanism to carry out Telescopic movement, the last three sections move at the same time, the movement is fast and stable, and the structure is simple.

3. The cross section of jib 1 is a pentagonal structure, and the cross sections of jib 3, jib 3, jib 4 and jib 5 are the same as jib 1. This structure is similar to the traditional quadrilateral cross-section jib. Comparatively, the cross-sectional strength is greater, the toughness is better, the local force-bearing area is increased, the concentrated load is dispersed, and the telescopic movement of the telescopic arm is more stable and smooth; Ensuring a larger receiving area for the telescopic boom and a more even load.

Description of drawings

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

Fig. 2 is a schematic diagram of the internal structure of the first arm, the second arm, the third arm, the fourth arm and the fifth arm in Fig. 1;

Fig. 3 is a cross-sectional view of section arm 1 in Fig. 1;

Fig. 4 is a cross-sectional view of section 1 of the utility model embodiment 2.

In the figure: 1-section arm one, 2-section arm two, 3-section arm three, 4-section arm four, 5-section arm five, 6-turntable, 7-telescopic cylinder, 8-first-stage telescopic cylinder, 9 -two-stage telescopic cylinder, 10-one-stage outrigger cable, 11-pulley one, 12-two-stage outrigger cable, 13-pulley two, 14-one-stage retractable cable, 15-pulley three.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example 1

As shown in Figure 1-3, a telescopic arm of a crane in a narrow space is characterized in that it includes joint arm one 1, joint arm two 2, joint arm three 3, joint arm four 4, joint arm five 5 and turntable 6, wherein The turntable 6 is fixed on the frame of the crane. The turntable is a crane slewing mechanism, which adopts an integral slewing speed reduction mechanism. The internal worm gear and worm are fully enclosed in the shell, which can realize 0-360° rotation. The telescopic oil cylinder 7 is articulated, that is, the cylinder barrel of the telescopic oil cylinder 7 is hinged with the side end of the turntable 6, and the piston rod of the telescopic oil cylinder 7 is hinged with the bottom end of the middle part of the joint arm 1, so the joint arm 1 can be controlled by controlling the expansion and contraction of the telescopic oil cylinder 7 uplift angle.

A first-stage telescopic cylinder 8 is arranged in the joint arm 1, the piston rod of the first-stage telescopic cylinder 8 is fixed at the tail of the joint arm 1, and the cylinder barrel of the first-stage telescopic cylinder 8 is fixed at the tail of the joint arm 2, so when the first-stage When telescopic cylinder 8 stretches, it can drive joint arm 2 2 to stretch;

The two-stage telescopic cylinder 9 is arranged in the joint arm two 2, the piston rod of the two-stage telescopic cylinder 9 is fixed on the tail of the joint two 2, and the cylinder barrel of the two-stage telescopic cylinder 9 is fixed on the tail of the joint three 3, so the two-stage telescopic The expansion and contraction of cylinder 9 can drive joint arm 3 3 to expand and contract;

The top of the secondary telescopic cylinder 9 is provided with a pulley 11, and the inner side of the tail of the second arm 2 is fixed with a first-level outrigger cable 10, and the first-level outrigger cable 10 bypasses the pulley 11 and one end is fixed on the inner side of the tail of the fourth arm 4. ; When the secondary telescopic cylinder 9 is extended, it drives the joint arm 4 4 to extend;

And joint arm three 3 afterbody outside fixed pulley two 13, joint arm two 2 top insides fix first-level retractable arm stay cable 14, one-level retractable arm stay cable 14 is fixed on joint arm four 4 afterbody outsides by going around an end of pulley two 13, When the secondary telescopic cylinder 9 contracts, the joint arm 44 is pulled to contract;

The fixed pulley three 15 on the inner side of the top of joint arm four 4, the outer side of the joint arm five five tails are fixed on the secondary outrigger stay cable 12, and the end of the second level outrigger stay cable 12 bypassing the pulley three 15 is fixed on the joint arm three 3 afterbody, so four The five-section arm 5 is pulled back by the secondary outrigger stay cable 12 when the joint arm 4 retracts.

Therefore, joint arm four 4, joint arm five 5 expansion and contraction are all completed under the promotion of joint arm three 3 upper secondary telescopic cylinder 9, so joint arm three 3, joint arm four 4, joint arm five 5 are synchronous expansion and contraction. When the telescopic arm of the utility model is extended, the first-stage telescopic cylinder 8 is controlled to start, and the cylinder barrel of the first-stage telescopic cylinder 8 drives the joint arm two 2 to stretch out at the same time, and the joint arm three 3, which is sleeved in the joint arm two 2, Joint arm four 4, joint arm five 5 also stretch out simultaneously with joint arm two 2 together. When the primary telescopic cylinder 8 drives the joint arm two 2 to fully stretch out, the secondary telescopic cylinder 9 is controlled to extend, thereby driving the joint arm three 3, the joint arm four 4, and the joint arm five 5 to elongate synchronously; and when needed When shrinking the utility model, after the completion of the contraction of the secondary telescopic cylinder 9, start the primary telescopic cylinder 8 to shrink until retracted to the original position.

In this embodiment, the cross section of the first arm 1 is a pentagonal structure, and the cross sections of the third arm 2, the third arm 3, the fourth arm 4 and the fifth arm 5 are the same as the first arm 1, as shown in Figure 3 According to the results, compared with the traditional quadrilateral section boom, this structure has stronger section strength, better toughness, increased local stress area, dispersed concentrated load, and more stable and smooth telescopic boom telescopic movement.

Example 2

The structure of embodiment 2 is the same as that of embodiment 1, except that the piston rods in the first-stage telescopic cylinder 8 and the second-stage telescopic cylinder 9 are nickel-chromium double-coated piston rods, and the angle at the top of the cross section of the joint arm 1 is 170°. Controlling this angle can ensure that the receiving area of the telescopic arm is larger and the load is more uniform.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model without limitation, other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the utility model, as long as they do not depart from the technical solution of the utility model The spirit and scope should be included in the claims of the present utility model.

Claims (4)

1. a kind of narrow space telescopic crane boom, it is characterised in that：Including joint arm one（1）, joint arm two（2）, joint arm three（3）、 Joint arm four（4）, joint arm five（5）And turntable（6）, the turntable（6）It is fixed on crane frame, the turntable（6）It cuts with scissors on top Connect joint arm one（1）, side articulated telescopic oil cylinder（7）, the telescopic oil cylinder（7）Top and the joint arm one（1）It cuts with scissors middle part bottom end It connects；

The joint arm one（1）Interior setting level-one telescoping cylinder（8）, the level-one telescoping cylinder（8）Piston rod be fixed on the joint arm One（1）Tail portion, the level-one telescoping cylinder（8）Cylinder barrel be fixed on the joint arm two（2）Tail portion；

The joint arm two（2）Interior setting two level telescoping cylinder（9）, the two level telescoping cylinder（9）Piston rod be fixed on joint arm two（2） Tail portion, the two level telescoping cylinder（9）Cylinder barrel be fixed on the joint arm three（3）Tail portion；

The two level telescoping cylinder（9）Pulley one is arranged in top（11）, the joint arm two（2）Tail inner side fixes level-one semi-girder drag-line （10）, the level-one semi-girder drag-line（10）Around the pulley one（11）One end be fixed on the joint arm four（4）Tail portion in Side；The joint arm three（3）Lateral tail fixes pulley two（13）, the joint arm two（2）Inside top fixes level-one contracting arm drag-line （14）, the level-one contracting arm drag-line（14）Around the pulley two（13）One end be fixed on the joint arm four（4）Lateral tail；

The joint arm four（4）Inside top fixes pulley three（15）, the joint arm five（5）Lateral tail fixes two level semi-girder drag-line （12）, the two level semi-girder drag-line（12）Around the pulley three（15）One end be fixed on the joint arm three（3）Tail inner side；

The joint arm one（1）Cross section be pentagonal configuration.

2. a kind of narrow space telescopic crane boom according to claim 1, it is characterised in that：The level-one telescoping cylinder （8）With two level telescoping cylinder（9）In piston rod be the double coating piston rods of nickel chromium triangle.

3. a kind of narrow space telescopic crane boom according to claim 1, it is characterised in that：The telescopic oil cylinder（7） Cylinder barrel and the turntable（6）Side is hinged, the telescopic oil cylinder（7）Piston rod and the joint arm one（1）It cuts with scissors middle part bottom end It connects.

4. a kind of narrow space telescopic crane boom according to claim 1, it is characterised in that：The joint arm one（1）'s Cross section top angle is 170 °.