Lorry-mounted crane supporting leg soft leg detection structure

Abstract

The utility model discloses a lorry-mounted crane supporting leg soft leg detection structure which comprises a base body, the base body is provided with an oblong-hole-shaped sliding groove used for installing a main pin shaft, the main pin shaft slides up and down in the sliding groove, a large bearing, a spacer bush and a flat washer are arranged on the main pin shaft, and a large check ring is arranged in a groove of the main pin shaft. The flat washer is located between the base body and the large check ring. A positioning screw, a driving lever pin shaft and a travel switch are arranged on the base body, a driving lever and a torsion spring are arranged on the driving lever pin shaft, a small check ring is arranged in a groove of the driving lever pin shaft, a swing rod of the travel switch swings along with the driving lever, an auxiliary pin shaft is arranged on the driving lever, an inner check ring is arranged in a groove of the auxiliary pin shaft, and a small bearing is arranged on the auxiliary pin shaft. According to the utility model, the modular design is adopted, the structure is compact, installation and use are convenient, and the use cost is low; through the amplification effect of the deflector rod, the detection precision is high, and the response is timely; and the stability of hoisting operation is improved, and tipping accidents are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of truck crane, especially relates to a truck crane outrigger soft leg detection structure. BACKGROUND

[0002] As a kind of convenient and efficient hoisting and transporting equipment, truck crane is widely used in various fields of social production and life, compared with professional truck crane, its stability detection device in operation process is relatively less weak, with the improvement of regulation and higher operation safety requirement, the stability of truck crane work urgently needs to be monitored, especially the detection of outrigger soft leg, to avoid overturning accident in operation process.

[0003] The detection device of prior art is provided with long round hole at the hinge shaft where outrigger cylinder is installed, and proximity sensor is installed near long round hole, the position of detection pin shaft or auxiliary support is detected, and then the supporting condition of outrigger is judged;But, the detection precision of such setting mode is not enough, and alarm cannot be given in the first time of outrigger soft leg.If displacement sensor is installed inside or outside outrigger cylinder, the length change of outrigger cylinder is detected, and then the supporting condition of outrigger is judged;Then, cost is increased higher, and calibration is needed before use, and use and maintenance are inconvenient.

[0004] Therefore, new type of truck crane outrigger soft leg detection device needs to be developed, detection precision is improved, and use cost is reduced. INVENTION CONTENTS

[0005] The utility model discloses a truck crane outrigger soft leg detection structure, adopt modular design, compact structure, convenient to install and use, and low in use cost;Through the amplification of lever, detection precision is high, and response is timely;The stability of hoisting operation is improved, and overturning accident is reduced.

[0006] Technical scheme: the utility model discloses a truck crane outrigger soft leg detection structure, and its characterized in that: including base body, base body is set with long round hole shape sliding slot for installing main pin shaft, main pin shaft slides up and down in sliding slot, and main pin shaft is equipped with large bearing, spacer sleeve and flat washer, and large baffle is arranged in the groove of main pin shaft, and flat washer is located between base body and large baffle;Positioning screw, lever pin shaft and travel switch are arranged on the base body, lever is arranged on lever pin shaft, and torsional spring is arranged on lever pin shaft, small baffle is arranged in the groove of lever pin shaft, and the swing bar of travel switch swings with lever, vice pin shaft is arranged on lever, and inner baffle is arranged in the groove of vice pin shaft, and small bearing is arranged on vice pin shaft.

[0007] Among them, the base body is installed on the lower bottom surface of truck crane fixed leg through a plurality of fastening screws.

[0008] The adjusting pad is arranged between the base body and the fixed leg.

[0009] The movable leg is arranged in the fixed leg, and the nylon sliding block is arranged between the movable leg and the fixed leg.

[0010] One end of the torsion spring is fixed on the positioning screw, and the other end of the torsion spring abuts against the lower cylindrical surface of the secondary pin shaft.

[0011] The push rod is arranged on the inner side of the base body.

[0012] The travel switch is provided with a self-resetting swing rod.

[0013] Compared with the prior art, the utility model has the following remarkable advantages: the utility model is installed at the lower end of the fixed leg of the truck-mounted crane, the gap state between the movable leg and the fixed leg is detected, the support state of the support leg and the soft leg state are judged, and the stable work of the crane is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is a side structural schematic view of the utility model;

[0016] Figure 3 It is a top view structural schematic view of the utility model;

[0017] Figure 4 It is a three-dimensional structural schematic view of the utility model;

[0018] Figure 5 It is a structural schematic view of the base body of the utility model;

[0019] Figure 6 It is a structural schematic view of the push rod of the utility model;

[0020] Figure 7 It is a work diagram of the support state of the support leg of the utility model;

[0021] Figure 8 It is a work diagram of the soft leg state of the support leg of the utility model;

[0022] 1 is base body; 2 is kingpin; 3 is flat washer; 4 is large stopper; 5 is positioning screw; 6 is torsion spring; 7 is lever pin; 8 is small stopper; 9 is lever; 10 is travel switch; 11 is large bearing; 12 is spacer sleeve; 13 is sub pin; 14 is inner stopper; 15 is small bearing; 16 is fastening screw; 17 is adjusting pad. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model is further described below with reference to the drawings and specific embodiments.

[0024] The base body 1 of the truck-mounted crane outrigger soft leg detection structure is provided with a long circular hole-shaped sliding groove for installing the kingpin 2, the kingpin 2 slides up and down in the sliding groove, the kingpin 2 is provided with a large bearing 11, a spacer sleeve 12 and a flat washer 3, the groove of the kingpin 2 is provided with a large stopper 4, and the flat washer 3 is located between the base body 1 and the large stopper 4; the base body 1 is provided with a positioning screw 5, a lever pin 7 and a travel switch 10, the lever pin 7 is provided with a lever 9 and a torsion spring 6, the groove of the lever pin 7 is provided with a small stopper 8, the swing lever of the travel switch 10 swings with the lever 9, the lever 9 is provided with a sub pin 13, the groove of the sub pin 13 is provided with an inner stopper 14, and the sub pin 13 is provided with a small bearing 15.

[0025] The base body 1 of the utility model is installed on the lower bottom surface of the fixed leg of the truck-mounted crane through a plurality of fastening screws 16. The base body 1 is provided with an adjusting pad 17 between the base body 1 and the fixed leg. The fixed leg is provided with a movable leg, and the movable leg is provided with a nylon sliding block between the movable leg and the fixed leg. One end of the torsion spring 6 is fixed on the positioning screw 5, and the other end of the torsion spring 6 abuts against the lower cylindrical surface of the sub pin 13. The lever 9 is located on the inner side of the base body 1. The travel switch 10 is provided with a self-resetting swing lever.

[0026] One end of the torsion spring 6 of the utility model is fixed on the positioning screw 5, the other end of the torsion spring 6 abuts against the lower cylindrical surface of the sub pin 13, and has an elastic force on the sub pin 13. Under the action of the torsion spring 6, the outer cylindrical surface of the small bearing 15 is always in contact with the outer cylindrical surface of the large bearing 11, and the large bearing 11 is pushed to move upward, and stops when moving to the upper end of the sliding groove of the base body 1. The utility model installs the detection device on the lower end of the fixed leg, and adjusts the installation height through the adjusting pad 17.

[0027] When the outrigger is in the supporting state, the movable leg is raised relative to the fixed leg to generate a small gap, the large bearing 11 in the detection device moves to the uppermost end, and is close to the movable outrigger, at this time, the travel switch 10 has no detection signal.

[0028] When the outrigger is in the soft leg state, the movable leg moves downward under the action of gravity, the movable leg is pressed on the large bearing 11 in the detection device, the large bearing 11 moves downward in the sliding groove of the base body 1, and further drives the lever 9 to rotate, and touches the travel switch 10.

[0029] The utility model installs below end of truck crane fixed leg, judges the support state and soft leg state through detecting the clearance state between movable leg and fixed leg, guarantees the stable work of crane. Adopt modularization design, compact structure, convenient installation and use, low in cost, through the amplification of the lever, the detection precision is high, the response is in time, improve the stability of hoisting operation, reduce the overturning accident.

Claims

1. A luffing detection structure of a truck crane outrigger, characterized in that: The utility model relates to a kind of movable kingpin bearing, including base body (1), base body (1) is equipped with long round hole shape sliding groove for installing kingpin (2), kingpin (2) slides up and down in sliding groove, kingpin (2) is equipped with big bearing (11), spacer sleeve (12) and flat washer (3), the groove of kingpin (2) is equipped with big check ring (4), flat washer (3) is located between base body (1) and big check ring (4);The base body (1) is equipped with positioning screw (5), lever pin shaft (7) and travel switch (10), lever pin shaft (7) is equipped with lever (9) and torsion spring (6), the groove of lever pin shaft (7) is equipped with small check ring (8), the swing bar of travel switch (10) swings with lever (9), lever (9) is equipped with auxiliary pin shaft (13), the groove of auxiliary pin shaft (13) is equipped with inner check ring (14), auxiliary pin shaft (13) is equipped with small bearing (15).

2. The load sensing structure of the truck-mounted crane according to claim 1, characterized in that: The base body (1) is installed on the lower bottom surface of the fixed leg of the truck-mounted crane by a plurality of fastening screws (16).

3. The load sensing structure of the luffing boom of the luffing boom slewing crane according to claim 2, characterized in that: The base body (1) is provided with an adjusting pad (17) between the fixed leg.

4. The outrigger soft leg detection structure for truck-mounted cranes according to claim 2, characterized in that: The fixed leg is provided with a movable leg, and a nylon sliding block is arranged between the movable leg and the fixed leg.

5. The load sensing structure of the truck-mounted crane according to claim 1, characterized in that: One end of the torsion spring (6) is fixed on the positioning screw (5), and the other end of the torsion spring (6) abuts against the lower cylindrical surface of the auxiliary pin shaft (13).

6. The load sensing structure of the truck-mounted crane according to claim 1, characterized in that: The lever (9) is located inside the base body (1).

7. The outrigger soft leg detection structure for truck-mounted cranes according to claim 1, characterized in that: The travel switch (10) is provided with a self-resetting swing bar.

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