CN102126682A - Single cylinder synchronous expansion and contraction device with multiple sets of inhaul cables for lorry-mounted crane - Google Patents

Abstract

A synchronous telescopic device for a single-cylinder arm body with multiple sets of pull cables for a truck-mounted crane, comprising a basic arm and a plurality of telescopic arms nested within the basic arm, and cylinder heads fixed on the tails of the basic arms are arranged in the plurality of telescopic arms. The cylinder is fixed on the telescopic oil cylinder at the end of the first telescopic arm. The arm body of the telescopic arm is equipped with a pulley, a telescopic arm cable, and a fixing plate. The telescopic arm is extended or retracted synchronously, which changes the operating characteristics of the existing arm body that can only be extended and extended sequentially. The telescoping speed of the arm body and the efficiency of the lifting operation are improved. Its compact structure and ingenious wire rope winding method make full use of the space inside the arm body and solve the problem that the existing five-section telescopic boom telescopic system of the truck-mounted crane must be realized by setting two built-in telescopic oil cylinders.

Description

Single-cylinder synchronous telescopic device with multiple sets of cable arms for truck-mounted cranes

technical field

The invention relates to a single-cylinder arm body expansion device, in particular to a single-cylinder arm body synchronous expansion device with multiple sets of pull cables, which is suitable for truck-mounted cranes.

Background technique

There are two main telescopic devices for the arm body of truck-mounted cranes currently in use: the first one consists of several external or built-in telescopic oil cylinders placed outside or inside the arm body to push the telescopic arm body to move. This device is more suitable for folding Boom truck-mounted cranes are not suitable for straight-arm truck-mounted cranes with large-tonnage three-section telescopic booms or more due to limitations in installation space, arm length, and their own weight. The second type is to use two or three built-in telescopic oil cylinders and a rope mechanism to drive several arms to expand and contract. The expansion and contraction sequence is that the first section or the first section and the second section of the arm body are stretched out first, followed by several sections. The arm stretches synchronously. This kind of telescopic arm needs to use two or three built-in telescopic oil cylinders, so it brings about a large cross-sectional size of the boom body, complex internal structure, heavy boom assembly, fast decay of crane lifting capacity, high cost, and high cost. Body expansion and contraction can only be performed sequentially, so the speed of arm body expansion and contraction is slower than synchronous expansion, and the lifting efficiency of the truck-mounted crane is low.

Contents of the invention

Technical problem: The purpose of the present invention is to overcome the deficiencies in the prior art and provide a single-cylinder truck-mounted crane with multiple pulleys, which has the advantages of simple and compact structure, small self-weight, fast boom expansion and contraction speed, low cost and high operating efficiency. Cable arm body synchronous telescopic system.

Technical solution: The single-cylinder synchronous telescopic device with multiple sets of cable arms of the truck-mounted crane of the present invention includes a basic arm and a plurality of telescopic arms nested in the basic arm; the plurality of telescopic arms are provided with a cylinder head The telescopic oil cylinder fixed at the end of the basic arm and the cylinder fixed at the end of the first section of the telescopic arm. There are side I fixed plate and II side fixed plate for fixing the rope respectively, the arm head pulleys of I telescopic arm are fixed on both sides of the arm head of the second section of telescopic arm, and the arm head of II telescopic arm is fixed on the upper part of the third section of telescopic arm. The pulley, the telescopic arm pulley III is fixed on the upper part of the fourth telescopic arm, and the recovery cable of the fifth telescopic arm is arranged on the fifth telescopic arm; the tail pulley of the telescopic arm I is fixed on the upper part of the first telescopic arm The arm tail of the second telescopic arm is fixed with the Ⅱ telescopic arm tail pulley, the front end of the Ⅱ telescopic arm tail pulley is fixed with the telescopic arm tail fixing plate, and the arm tail of the third telescopic arm is symmetrically equipped with the Ⅰ telescopic arm tail The inclined pulley and the inclined pulley at the tail of the telescopic arm of the second telescopic arm, the tail sleeve of the telescopic arm is fixed on the arm tail of the fourth section of the telescopic arm, and the half pulley of the telescopic arm is fixed on the upper part of the arm tail of the fourth section of the telescopic arm; the fifth section of the telescopic arm The upper part of the arm tail of the telescopic arm is fixed with a half pulley of the telescopic arm; the upper part of the telescopic oil cylinder is provided with a rope row fixed at one end on the basic arm, and the other end of the rope row bypasses the pulley of the telescopic oil cylinder built in the cylinder head of the telescopic oil cylinder and fixes it on the second telescopic arm. The arm tail of the arm; the front part of the arm body of the basic arm is provided with a second telescopic arm recovery cable with one end fixed by a screw, and the other end of the second telescopic arm recovery cable bypasses the tail pulley of the telescopic arm and is fixed by a screw On the fixed plate of the tail of the telescopic arm; on the head of the third telescopic arm, there is a recovery cable of the third telescopic arm with one end fixed by a screw, and the other end of the recovery cable of the third telescopic arm bypasses the pulley at the tail of the telescopic arm of II , and then go around the half pulley of the telescopic oil cylinder, go around and fix it on the other side of the arm head of the third telescopic arm in the opposite direction; on the fixed plate on the I side of the second telescopic arm, there is a third telescopic arm puller with one end fixed by a screw The other end of the cable of the third telescopic arm bypasses the inclined pulley at the end of the telescopic arm and fixes it on the tail sleeve of the telescopic arm through a screw; The arm recovery cable, the recovery cable of the fifth telescopic arm bypasses the inclined pulley at the tail of the telescopic arm of the second telescopic arm and is fixed on the second side fixed plate of the telescopic arm through a screw; The fixed third telescopic arm stretches out the dragline, and the other end of the third telescopic arm stretches out the dragline, and the pulley at the head of the I telescopic arm is fixed on the arm tail of the third telescopic arm through a screw rod; The upper part of the head is equipped with a fifth telescopic arm recovery cable fixed by a screw at one end, and the other end of the fifth telescopic arm recovery cable bypasses the pulley of the telescopic arm head of the II telescopic arm, and then bypasses the half pulley of the telescopic arm I, and then loops back and fixes in the opposite direction. On the upper part of the arm head of the second telescopic arm; the upper part of the arm head of the second telescopic arm is provided with a third telescopic arm extension cable fixed by a screw at one end, and the extension cable of the third telescopic arm bypasses the pulley of the third telescopic arm , and then walk around the half pulley of the telescopic arm of II, and then go around in the opposite direction and fix it on the upper part of the arm head of the second section of the telescopic arm.

The arm tail of the basic arm is provided with the I pin shaft at one end of the fixed rope row; the arm tail of the second telescopic arm is provided with the II pin shaft pin shaft at the other end of the fixed rope row; of the same number.

Beneficial effect, due to the adoption of the above scheme, the synchronous extension or retraction of the multi-section telescopic boom can be realized, which changes the operating characteristics of the existing arm body expansion and contraction only in sequence, so that the multi-section telescopic boom can be extended with the built-in telescopic oil cylinder. Telescopic, and ensure the synchronous expansion and contraction of the multi-section boom body, thus greatly improving the telescopic speed of the boom body and the efficiency of lifting operations. The synchronous telescopic structure of the single oil cylinder with four sets of cable arm bodies of the present invention has a compact structure, the wire rope is wound in an ingenious way, and the inner space of the arm body is fully utilized. The five-section telescopic boom telescopic system of the truck-mounted crane must be realized by setting two built-in telescopic oil cylinders. The weight of the arm body assembly is greatly reduced, while the lifting capacity of the arm body is increased, the telescoping efficiency of the arm body is high, the purchase cost is saved, the difficulty of assembly is reduced, and it has a wide range of practicability.

Description of drawings

Fig. 1 is a structural diagram of the present invention.

Fig. 2 is an enlarged view of the structure of the outrigger head of the present invention.

Fig. 3 is an enlarged view of the structure of the tail of the outrigger of the present invention.

In the figure: 1-basic arm; 2-recovery cable of the second telescopic arm; 3-first telescopic arm; 4-second telescopic arm; 5-extended cable of the fourth telescopic arm; 6-fifth telescopic arm The arm stretches out the cable; 7-the third telescopic arm; 8-the fourth telescopic arm; 9-the fifth telescopic arm; 10-the fifth telescopic arm recovers the cable; 11-the third telescopic arm recovers the cable; 12-Recovery cable of the fourth telescopic arm; 13-Telescopic oil cylinder; 14-Rope row; 15-Extending cable of the third telescopic arm; 16-Second section I telescopic arm side fixing plate; 17-The second telescopic arm Head pulley; 18 The third section telescopic arm head pulley; 19-The fourth telescopic arm head pulley; 20-Telescopic oil cylinder pulley; 21-Telescopic oil cylinder half pulley; Ⅰ pin shaft; 24-the tail pulley of the first section telescopic arm; 25-the fixed plate of the second section telescopic arm tail; 26 the second section telescopic arm tail pulley; 27-the third section Ⅰ telescopic arm tail oblique pulley; 28-the tail sleeve of the fourth section telescopic arm; 29-Ⅰ telescopic arm half pulley; 30-Ⅱ telescopic arm half pulley; 31-the third section Ⅱ telescopic arm tail oblique pulley; 32-Ⅱ pin shaft.

Detailed ways

An embodiment of the present invention is described below in conjunction with accompanying drawing:

As shown in Fig. 1, the single-cylinder belt multi-set cable arm synchronous telescopic device of the present invention is mainly composed of a basic arm 1 and four sets of cable arms that are nested in the basic arm 1 and consist of 5 telescopic arms. ;The fifth section of telescopic arm 9, the fourth section of telescopic arm 8, the third section of telescopic arm 7, the second section of telescopic arm 4, the first section of telescopic arm 3, the basic arm 1; from the fifth section of telescopic arm 9 to the basic arm 1. Set them in the body of the previous section of the arm in order, the basic arm 1 is at the outermost end, and the telescopic arm 9 of the fifth section is at the inner end; telescopic oil cylinders 13 are arranged in the five telescopic arms, and the cylinder head of the telescopic oil cylinder 13 is fixed on the basic The arm tail of arm 1, the cylinder barrel of telescopic oil cylinder 13 is fixed on the arm tail of first section telescopic arm 3; The cylinder bottom of telescopic oil cylinder 13 is provided with telescopic oil cylinder pulley 20 and telescopic oil cylinder half pulley 21 through support; The front and rear sides of the arm body of 4 are respectively provided with the I side fixing plate 16 and the II side fixing plate 22 for fixing the rope, and the arm head pulleys 17 of the I telescopic arm 4 are fixed on both sides of the arm head of the second section telescopic arm 4, and the telescopic arm head pulley 17 of the third section telescopic arm 4 is fixed. The upper part of the arm 7 is fixed with a II telescopic arm head pulley 18, the upper part of the fourth section telescopic arm 8 is fixed with a III telescopic arm pulley 19, and the fifth section telescopic arm 9 is provided with a fifth telescopic arm recovery cable 10; The upper part of the boom tail of the telescopic boom 3 is fixed with the tail pulley 24 of the telescopic boom Ⅱ, the tail pulley 26 of the telescopic boom 2 is fixed on the tail of the telescopic boom 4 of the second section, and the tail pulley 26 of the telescopic boom Ⅱ is respectively fixed on the second section On both sides of the arm tail of the telescopic arm 4, the front end of the II telescopic arm tail pulley 26 is fixed with a telescopic arm tail fixing plate 25, and the telescopic arm tail fixing plate 25 is fixed to the arm tail of the second telescopic arm 4 by passing through its screw rod. ; The arm tail of the third section telescopic arm 7 is symmetrically provided with I telescopic arm tail oblique pulley 27 and II telescopic arm tail oblique pulley 31, and I telescopic arm tail oblique pulley 27 and II telescopic arm tail oblique pulley 31 are respectively fixed On the upper and lower parts of the tail of the telescopic arm 7 of the third section; the tail sleeve 28 of the telescopic arm 8 is fixed on the tail of the telescopic boom 8 of the fourth section, and the half pulley of the telescopic arm Ⅰ is fixed on the upper part of the tail of the telescopic boom 8 of the fourth section 29; the upper part of the arm tail of the fifth section telescopic arm 9 is fixed with the II telescopic arm half pulley 30; the top of the telescopic oil cylinder 13 is provided with a rope row 14, and one end of the rope row 14 is fixed to the arm tail of the basic arm 1 through the I pin shaft 23 , the wire rope group bypasses the telescopic cylinder pulley 20 of the cylinder head of the telescopic cylinder 13, and the other end is fixed to the arm tail of the second telescopic boom 4 through the pin shaft pin 32 of II, and the number of 14 rope rows is the same as that of the telescopic cylinder pulley 20. same number. The front part of the arm body of the basic arm 1 is provided with a second telescopic arm recovery cable 2 fixed by a screw at one end, and the other end of the second telescopic arm recovery cable 2 bypasses the arm tail pulley 24 of the first telescopic arm and is fixed on the telescopic arm by a screw. On the arm tail fixing plate 25; the third telescopic arm 7 arm head is provided with a third telescopic arm recovery cable 11 fixed by a screw at one end, and the other end of the third telescopic arm recovery cable 11 bypasses the II telescopic arm After the tail pulley 26, go around the half pulley 21 of the telescopic oil cylinder, go around and fix it on the other side of the arm head of the third section telescopic arm 7 along the original direction; The third telescopic arm cable 12 fixed by the screw, the other end of the third telescopic arm cable 12 is fixed on the telescopic arm tail sleeve 28 through the screw rod around the I telescopic arm tail inclined pulley 27, and the telescopic arm tail sleeve The barrel 28 is fixed on the arm tail of the fourth telescopic arm 8; the arm head of the fifth telescopic arm 9 is provided with a recovery cable 10 of the fifth telescopic arm with one end fixed by a screw, and the recovery cable 10 of the fifth telescopic arm bypasses the II The tail inclined pulley 31 of the telescopic arm is fixed on the II side fixed plate 22 of the second section telescopic arm 4 through a screw rod. The third telescopic arm stretches out the drag cable 15 one end and is fixed on the arm tail of the first section telescopic arm 3 through the screw rod, and the steel wire rope walks around the 1 telescopic arm arm head pulley 17, and the other end is fixed on the arm tail of the third section telescopic arm 7 through the screw rod The fourth telescopic arm stretches out drag cable 5 one ends and is fixed on the 4 arm head tops of the second telescopic arm through the screw rod, and the wire rope walks around the small pulley 18 of the telescopic arm head of the third telescopic arm, and turns back from the half pulley 29 of the fourth telescopic arm , wrap around in the opposite direction. Its other end screw rod is also fixed on the upper part of the arm head of the second telescopic arm 3; one end of the extension cable 6 of the fifth telescopic arm is fixed on the upper part of the arm head of the second telescopic arm 4 through the screw rod, and the wire rope bypasses the pulley 19 of the telescopic arm III. Turn back from the fifth joint telescopic arm half pulley 30 again, and go around in the opposite direction. Its other end screw rod is also fixed on the 4 arm head tops of the second telescopic arm.

Arm extension action: because the telescopic oil cylinder 13 piston rod head is fixed on the arm tail of the basic arm 1, and the cylinder barrel is fixed on the arm tail of the first telescopic arm 3, so when the telescopic oil cylinder 13 is supplied with oil from the large cavity, the cylinder barrel stretches out, The first joint telescopic arm 3 stretches out; Simultaneously, telescopic oil cylinder pulley 20 drags rope row 14 and drives second joint telescopic arm 4 to stretch out; Immediately after 1 telescopic arm arm head pulley 17 drives the 3rd telescopic arm stretches out cable 15 The third telescopic arm 7 is pulled out, and the second telescopic arm pulley 18 drags the fourth telescopic arm to extend the cable 5, thereby pulling out the fourth telescopic arm 8; finally, the third telescopic arm pulley 19 drags the fifth telescopic arm. The telescopic arm stretches out the stay cable 6, and the fifth joint telescopic arm 9 is pulled out.

Arm retraction action: that is, the reverse action of arm extension action. When the small chamber of telescopic oil cylinder 13 supplies oil, the cylinder barrel retracts, and the first section of telescopic arm 3 retracts; at the same time, the arm tail pulley 24 of I telescopic arm drags the recovery cable 2 of the second telescopic arm to recover, and the second telescopic arm retracts. The arm 4 is pulled back; at this time, the tail pulley 26 of the second telescopic arm drags the third telescopic arm recovery cable 11 to pull the third telescopic boom 7 back; The pulley 27 drags the recovery cable 12 of the fourth telescopic arm to retract, thereby dragging back the fourth telescopic arm 8; at the same time, the second telescopic arm tail inclined pulley 31 of the third telescopic arm 7 drives the recovery cable of the fifth telescopic arm 10 retracts, and the fifth joint telescopic arm 9 is pulled back.

Claims (3)

1. many parbuckles of lorry-mounted crane single cylinder band arm body synchronization telescope device comprises basic arm (1), nestable a plurality of telescopic booms in basic arm (1); It is characterized in that: be provided with cylinder head in described a plurality of telescopic booms and be fixed on the telescopic oil cylinder (13) that basic arm (1) arm tail, cylinder barrel are fixed on first segment telescopic boom (3) arm tail, the cylinder bottom of telescopic oil cylinder (13) is provided with telescopic oil cylinder pulley (20) and telescopic oil cylinder half pulley (21) through support; Both sides are respectively equipped with the I side adapter plate (16) and the II side adapter plate (22) of stationary rope before and after the arm body of the second joint telescopic boom (4), the arm head both sides of the second joint telescopic boom (4) are fixed with I telescopic boom arm head pulley (17), the top of the 3rd joint telescopic boom (7) is fixed with II telescopic boom arm head pulley (18), the top of the 4th joint telescopic boom (8) is fixed with III telescopic boom pulley (19), and the 5th joint telescopic boom (9) is provided with the 5th telescopic boom and reclaims drag-line (10); The arm tail top of first segment telescopic boom (3) is fixed with I telescopic boom arm stern sheave (24), be fixed with II telescopic boom arm stern sheave (26) on the arm tail of the second joint telescopic boom (4), the front end of II telescopic boom arm stern sheave (26) is fixed with telescopic boom arm tail adapter plate (25), be arranged with oblique pulley of I telescopic boom arm tail (27) and the oblique pulley of II telescopic boom arm tail (31) on the arm tail of the 3rd joint telescopic boom (7), be fixed with telescopic boom arm tail sleeve (28) on the arm tail of the 4th joint telescopic boom (8), the arm tail top of the 4th joint telescopic boom (8) is fixed with I telescopic boom half pulley (29); The arm tail top of the 5th joint telescopic boom (9) is fixed with II telescopic boom half pulley (30); The top of telescopic oil cylinder (13) is provided with an end and is fixed on rope row (14) on the basic arm (1), and rope row (14) other end is walked around the arm tail that is fixed on the second joint telescopic boom (4) behind the built-in telescopic oil cylinder pulley (20) of telescopic oil cylinder (13) cylinder head; The arm body front portion of basic arm (1) is provided with an end and reclaims drag-line (2) through the second fixing telescopic boom of screw rod, and second telescopic boom reclaims the other end of drag-line (2) and walks around I telescopic boom arm stern sheave (24) after screw rod is fixed on the telescopic boom arm tail adapter plate (25); The 3rd joint telescopic boom (7) arm head is provided with an end and reclaims drag-line (11) through the 3rd fixing telescopic boom of screw rod, after the other end of the 3rd telescopic boom recovery drag-line (11) is walked around II telescopic boom arm stern sheave (26), walk around telescopic oil cylinder half pulley (21) again, the reversing sense wraparound is fixed on the arm head opposite side of the 3rd joint telescopic boom (7); The I side adapter plate (16) of the second joint telescopic boom (4) is provided with an end through the 3rd fixing telescopic boom drag-line (12) of screw rod, and the other end of the 3rd telescopic boom drag-line (12) is walked around the oblique pulley of I telescopic boom arm tail (27) and is fixed on the telescopic boom arm tail sleeve (28) through screw rod; The 5th joint telescopic boom (9) arm head is provided with an end and reclaims drag-line (10) through the 5th fixing telescopic boom of screw rod, and the 5th telescopic boom recovery drag-line (10) is walked around the oblique pulley of II telescopic boom arm tail (31) and is fixed on the II side adapter plate (22) of the second joint telescopic boom (4) through screw rod; The arm tail of first segment telescopic boom (3) is provided with an end and stretches out drag-line (15) through the 3rd fixing telescopic boom of screw rod, and the 3rd telescopic boom stretches out the other end of drag-line (15) and walks around I telescopic boom arm head pulley (17) is fixed on the 3rd joint telescopic boom (7) through screw rod arm tail; The arm head top of the second joint telescopic boom (4) is provided with an end and reclaims drag-line (5) through the 5th fixing telescopic boom of screw rod, the 5th telescopic boom reclaims the other end of drag-line (5) and walks around II telescopic boom arm head pulley (18), walk around I telescopic boom half pulley (29) again, the reversing sense wraparound is fixed on the arm head top of the second joint telescopic boom (3); The arm head top of the second joint telescopic boom (4) is provided with an end and stretches out drag-line (6) through the 3rd fixing telescopic boom of screw rod, the 3rd telescopic boom stretches out drag-line (6) and walks around III telescopic boom pulley (19), walk around II telescopic boom half pulley (30) again, the reversing sense wraparound is fixed on second joint telescopic boom (4) the arm head top.

2. many parbuckles of lorry-mounted crane single cylinder band arm body synchronization telescope device according to claim 1 is characterized in that: described basic arm (1) arm tail is provided with the I bearing pin (23) of static line row (14) one ends; The arm tail of the second joint telescopic boom (4) is provided with the II bearing pin bearing pin (32) of static line row (14) other end.

3. many parbuckles of lorry-mounted crane single cylinder band arm body synchronization telescope device according to claim 1 is characterized in that: described rope row (14) radical is identical with the number of telescopic oil cylinder pulley (20).

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