CN201817231U - Balance crane - Google Patents

Abstract

The utility model discloses a balance crane, which aims at providing a balance crane which directly grasps a CNG high-pressure gas storage cylinder, is easy to operate, and saves time and effort. It includes a car seat, a column, a rotary box, a power unit, a transmission device, a balance weight, a lifting rod and a parallel four-bar linkage mechanism. Claws, connecting rods and connecting rods, the clamping claws are set at both ends of the connecting rod, the connecting rods are provided with connecting rods, the connecting rods are rotatably connected with the boom, and the clamping claws include pull rod a, pull rod b, clamping rod a and clamp Tightening rod b, one end of pull rod a is hinged with connecting rod, the other end is hinged with clamping rod b, one end of pull rod b is hinged with connecting rod, the other end is hinged with clamping rod a, and the middle of clamping rod a and clamping rod b is hinged. The balance crane has the advantages of simple structure, convenient operation and time-saving and labor-saving. This balance crane is used for grabbing and handling CNG high-pressure cylinders.

Description

Balance crane

technical field

The utility model relates to a lifting device, in particular to a balance crane for grabbing a CNG high-pressure gas storage bottle.

Background technique

At present, dual-fuel vehicles mainly use gasoline and compressed natural gas as fuel. Compressed natural gas is generally stored in CNG high-pressure gas storage cylinders. CNG high-pressure gas storage cylinders are heavy, and manual handling is labor-intensive. Therefore, a simpler lifting device is used for handling to reduce labor intensity. Generally, a balance crane is used. The balance crane is mainly used for lifting workpieces in the workshop and moving objects in local spaces. , has the characteristics of flexibility, portability and low cost. However, the existing balance cranes generally have a complex structure. When grabbing some bottle and barrel parts, they usually have to use ropes to tie these bottle and barrel parts tightly, and then use a hook to hook the rope for lifting. The operation is cumbersome, time-consuming and laborious. . The Chinese utility model patent specification CN201338913Y announced on November 4, 2009 discloses a balance crane, which includes a column, a rotary box, a motor, a transmission device, a lifting device, a balance device, a hook and a control circuit, and a parallel four The link mechanism includes long swing arm, short swing arm, balance bar and boom, long swing arm and short swing arm are connected in rotation, short swing arm is connected in rotation with balance bar, balance bar is connected in rotation with boom, long swing arm and hanger The arm is rotated and connected, and the lifting arm is fixedly connected with the long swing arm of the parallel four-bar linkage mechanism. The power is transmitted to the lifting arm through the transmission device, and the lifting arm drives the long swing arm of the parallel four-bar linkage mechanism to move up and down to control the boom of the parallel four-bar linkage mechanism. Lifting, at the same time, there are rollers on the connecting shaft of the short swing arm and the balance bar. The rollers are set in the guide grooves on the slewing box. The rollers can roll back and forth in the guide grooves, and can control the boom at the front end of the parallel four-bar linkage mechanism to move forward and backward. At the same time, the slewing box and the column are connected by bearings, and the slewing box and the column can rotate relatively to drive the boom to rotate. There is a hook connected to the front end of the boom, and the hook can lift the goods. When storing gas cylinders, you need to place the CNG high-pressure gas storage cylinders on the rope first, then fix the CNG high-pressure gas storage cylinders tightly with the ropes, then hook the ropes with a hook for lifting, and put the CNG high-pressure gas storage cylinders into the trunk of the car In the future, it is also necessary to lift the CNG high-pressure gas storage cylinder, and then pull out the rope, resulting in cumbersome operations, great effort, and a waste of time.

Utility model content

The utility model mainly solves the problems in the prior art that when the CNG high-pressure gas storage cylinder needs to be repeatedly lifted by a balanced hoist, the operation is cumbersome, time-consuming and labor-intensive, and provides a balance hoist. The balance crane ensures that there is no need to lift the CNG high-pressure gas cylinder when lifting the CNG high-pressure gas cylinder, and the operation is simple, saving time and effort.

In order to solve the above-mentioned technical problems, the utility model adopts such a balance crane, which includes a car seat, a column, a rotary box, a power device, a transmission device, a balance block, a lifting rod and a parallel four-bar linkage mechanism, and the rotary box is connected to the column in rotation. , the balance weight is fixed at one end of the lifting rod, the parallel four-bar linkage mechanism includes a long swing arm, a short swing arm, a balance bar and a boom, the lifting rod is fixedly connected with the long swing arm, and the connecting shaft of the short swing arm and the balance bar is provided with Roller, the front end of the boom is provided with a grabbing device, the grabbing device includes two clamping claws, a connecting rod and a connecting rod, the two clamping claws are arranged at both ends of the connecting rod, and the middle of the connecting rod A connecting rod is provided, and the connecting rod is rotatably connected with the boom. The clamping claw is a symmetrical four-bar linkage mechanism, including a pull rod a, a pull rod b, a clamping rod a, and a clamping rod b. One end of the pull rod a is connected to The connecting rod is hinged, the other end is hinged with the clamping rod b, one end of the tie rod b is hinged with the connecting rod, and the other end is hinged with the clamping rod a, the clamping rod a and the clamping rod b are arc rods, the clamping rod a and the clamp The middle of the tight rod b is hinged. The column is a shaft with a stepped through hole in the middle, and a rotating bearing is fixed at the step of the stepped through hole, and a stepped shaft is fixed at the lower end of the revolving box. The bearing and the column can rotate relative to each other. The power device drives the lifting rod and the long swing arm to move up and down, drives the movement of the parallel four-bar linkage mechanism, and controls the lifting of the grabbing device on the front boom of the parallel four-bar linkage mechanism. At the same time, the parallel four-bar linkage mechanism The rollers are connected with the rotary box in a rolling manner, which can control the grabbing device to move forward and backward. The grabbing device uses two clamping claws arranged at both ends of the connecting rod, so that the clamping claws can clamp both ends of the CNG high-pressure gas storage cylinder to ensure that the CNG The high-pressure gas storage cylinder is balanced, and the connecting rod is fixed on the rotating shaft at the front end of the boom of the parallel four-bar linkage mechanism, so the entire grabbing device can swing in a plane to ensure the stability of the CNG high-pressure gas storage cylinder, and at the same time, the grabbing device can be rotated To adjust the position of the CNG high-pressure cylinder. The two clamping rods and the two connecting rods of the clamping claw can rotate relatively through the shaft, so as to control the opening degree of the two clamping rods. After the two clamping rods clamp the CNG high-pressure gas cylinder, the two clamping The clamping lever of the clamping claw will automatically clamp the CNG high-pressure gas storage cylinder under the action of gravity of the CNG high-pressure gas storage cylinder.

As a preference, the clamping rod a and the clamping rod b are semicircular as a whole in the clamping state. The length of the clamping part of the clamping rod a and the clamping rod b is too long, which will cause the opening of the two clamping rods to be insufficient, and the CNG high-pressure gas storage cylinder cannot pass through this opening. The clamping rod a The length of the clamping part of the clamping rod b is too short to clamp the CNG high-pressure gas cylinder, so the length of the clamping part of the two clamping rods is a quarter of the arc, and the two clamping rods are in the clamped state The lower part is semicircular.

Preferably, the upper surface of the revolving box is provided with a box guide rail, one end of the box guide rail is vertically fixed with a limit rod, and the rollers are rollingly connected with the box guide rail. The rollers are rolling bearings. The short swing arm and balance bar can move horizontally on the guide rail on the upper surface of the revolving box through the rolling bearing. The limit rod is used to limit the rolling bearing to prevent it from slipping out of the guide rail. and the balance bar movement stroke, thereby controlling the horizontal movement distance of the boom of the parallel four-bar linkage mechanism.

Preferably, the power device is a cylinder, the transmission device includes a guide rail, a sliding shaft and a coupling, the cylinder and the guide rail are fixed on the side of the revolving box, the lifting rod and the long swing arm are fixed together by the sliding shaft, and the sliding shaft and the guide rail Sliding connection, the piston rod of the cylinder is fixedly connected with the coupling, and the coupling is rotationally connected with the sliding shaft. Compared with the motor, the cost of the cylinder is low, and the structure is relatively simple. The sliding shaft is connected with the lifting rod and the long swing arm of the parallel four-bar linkage mechanism. The sliding shaft is set in the guide groove of the guide rail, and the piston rod of the cylinder pushes the sliding shaft through the coupling Sliding up and down in the guide groove of the guide rail drives the elevating rod and the long swing arm of the parallel four-bar linkage to move, and controls the lifting of the boom of the parallel four-bar linkage.

Preferably, the upper and lower ends of the guide rail are provided with limit blocks, and by changing the length of the guide rail and the position of the limit blocks, the stroke of the guide rail can be changed, thereby controlling the lifting range of the boom.

Preferably, one end of the lower surface of the vehicle seat is provided with universal wheels, and the other end is provided with fixed casters. In this way, the entire balance crane can be moved, and it is more convenient to carry the CNG high-pressure gas storage cylinder. The universal wheel can rotate 360° horizontally, which is convenient for the balance crane to turn and adjust the position.

The beneficial effect of the utility model is that the balance hoist does not need to lift the CNG high-pressure gas storage cylinder when lifting the CNG high-pressure gas storage cylinder, the operation is simple, and time and effort are saved.

Description of drawings

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

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a schematic structural view of the vehicle seat of the present invention.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

As shown in Figure 1, the balance crane includes a car seat 1, a column 2, a rotary box 3, a power unit 4, a transmission device 5, a balance weight 6, a lifting rod 7, a parallel four-bar linkage mechanism 8 and a grabbing device 9. As shown in Figure 3, vehicle seat 1 comprises two universal wheels 11, two fixed casters 12, longitudinal beam 13, two short beams 14, reinforcing plate 15, two inclined beams 16 and short longitudinal beam 17, described The longitudinal beam 13, two short beams 14, two inclined beams 16 and short longitudinal beams 17 are hollow square steel, and the two inclined beams 16 are obliquely welded on the left side of the longitudinal beam 13, and the two inclined beams 16 are a kind of In the open state, the short longitudinal beam 17 is welded between the two inclined beams 16, and the two short beams 14 are welded between the longitudinal beam 13 and the short longitudinal beam 17. The longitudinal beam 13, the two short beams 14, the two The upper surfaces of the inclined beams 16 and the short longitudinal beams 17 are in one plane, and the reinforcing plate 15 is fixed on the upper surfaces of the longitudinal beams 13, two short beams 14, two inclined beams 16 and the short longitudinal beams 17, and the two universal Wheel 11 is fixed on the two ends of longitudinal beam 13, and two described fixed casters 12 are fixed on one end of inclined beam 16. The column 2 is vertically fixed on the upper surface of the reinforcing plate 15 .

As shown in Figures 1 and 2, the revolving box 3 includes a rectangular box 31, a trapezoidal box 32 and a rotating shaft 33, the rotating shaft 33 is a stepped shaft, and the large end of the rotating shaft 33 is vertically welded to the rectangular box 31, the trapezoidal box 32 is welded on the upper end of the rectangular box 31, there is a stepped through hole in the middle of the column 2, the step of the stepped through hole is fixed with a rotating bearing, the rotating shaft 33 of the rotary box 3 is connected to the column 2, the middle of the rectangular box 31 is hollow, and the trapezoidal box 32 is a hollow box welded by steel plates, one section of which is trapezoidal, and the two sides of the upper surface of the trapezoidal box 32 are horizontal Two box body guide rails 34 are provided, and one end of the upper surface of each box body guide rail 34 is vertically welded with a limit rod 35 .

Power unit 4 is cylinder 41, and transmission device 5 comprises two guide rails 51, slide shaft 52 and coupling 53, and cylinder 41 is fixed on the side of rectangular casing 31 with screw, and two guide rails 51 are fixed on the side of trapezoidal casing 32. on the side. The guide rail 51 includes a limit block 511, a guide rail plate a512 and a guide rail plate b513, the limit block 511 is two sleeves, and the sleeves are placed at the upper and lower ends between the guide rail plate a512 and the guide rail plate b513, four parts Fasten together with screws. Described parallel four-bar linkage mechanism 8 comprises a long swing arm 81, a short swing arm 82, a balanced bar 83 and a boom 84, the long swing arm 81 and the short swing arm 82 are rotationally connected, and the short swing arm 82 and the balance bar 83 rotate connection, the balance bar 83 is rotationally connected with the boom 84, the long swing arm 81 is rotationally connected with the boom 84, the balance weight 6 is fixed at one end of the lifting rod 7, and the lifting rod 7 and the long swing arm 81 are fixed together by the sliding shaft 52, sliding The shaft 52 is placed in the groove of the guide rail 51, the coupling 53 is sleeved on the sliding shaft 52, the coupling 53 can rotate relative to the sliding shaft 52, the coupling 53 is fixedly connected with the piston rod of the cylinder 41 with a thread, and at the same time the short pendulum The connecting shaft of arm 82 and balance bar 83 is provided with roller 85, and roller 85 is rolling bearing, and rolling bearing is placed on the casing guide rail 34 on the revolving box 3.

The front end of the boom 84 of the parallel four-bar linkage mechanism 8 is equipped with a rotating shaft, and the grasping device 9 includes two clamping claws 91, a connecting rod 92 and a connecting rod 93, and the two clamping claws 91 It is arranged at both ends of the connecting rod 92, and the middle part of the connecting rod 92 is provided with a connecting rod 93. The connecting rod 93 is screwed to the rotating shaft at the front end of the boom 84. The clamping claw 91 is a symmetrical four-bar linkage mechanism, including Pull rod a911, pull rod b912, clamping rod a913 and clamping rod b914, one end of pull rod a911 is hinged with connecting rod 92, the other end of pull rod a911 is hinged with clamping rod b914, one end of pull rod b912 is hinged with connecting rod 92, and the other end of pull rod b912 is hinged with The clamping rod a913 is hinged, the clamping rod a913 and the clamping rod b914 are arc rods, the middle of the clamping rod a913 and the clamping rod b914 is hinged, and the clamping rod a913 and the clamping rod b914 are semicircular in the clamping state .

When in use, move the balance crane to the vicinity of the CNG high-pressure gas storage cylinder, press the control switch by hand, and the piston rod of the control cylinder 41 extends upwards, and the sliding shaft 52 is driven to slide on the guide rail 51 through the coupling 53, so that the lifting rod 7 and the long swing arm 81 move upward, and through the parallel four-bar linkage mechanism 8, the boom 84 is driven down. When the boom 84 drops to a suitable position, the control switch is released, the cylinder 41 stops moving, and the two clamps are clamped by hand. The claws 91 are stretched one by one, and then the two clamping claws 91 are respectively clamped on the two ends of the CNG high-pressure gas storage cylinder, and then the control switch is pressed by hand to control the piston rod of the cylinder 41 to retract, so that the lifting rod 7 and the long The swing arm 81 moves downward, and through the parallel four-bar linkage mechanism 8, it drives the boom 84 to rise, and the two clamping claws 91 will automatically clamp under the gravity of the CNG high-pressure gas cylinder. When the CNG high-pressure gas cylinder rises to a suitable Then stop the cylinder 41, hover the CNG high-pressure gas cylinder at this height, then move the balance crane to the back of the car, the seat 1 can be stretched under the car, and the boom 84 can be stretched into the trunk of the car. Stop the balance crane, because the short swing arm 82 of the parallel four-bar linkage mechanism 8 and the connecting shaft of the balance bar 83 are provided with rolling bearings, the rolling bearings are placed on the box guide rail 34 on the rotary box 3, and the rotary box 3 and the column 2 is connected with a rotating bearing, so pushing the CNG high-pressure gas cylinder forward, backward, left, and right by hand will drive the parallel four-bar linkage mechanism 8 to move back and forth on the box guide rail 34 of the rotary box 3, and at the same time, the rotary box 3 will rotate relative to the column 2, and the CNG The high-pressure gas storage cylinder can move back and forth and swing left and right, so that the CNG high-pressure gas storage cylinder can be adjusted to a suitable position, and then the cylinder 41 is controlled to put the CNG high-pressure gas storage cylinder down, the clamping claw 91 is released, and the balance hanging Remove it, and then fix the CNG high-pressure cylinder in the trunk of the car. the

Claims (6)

1. A balance crane, comprising a car seat (1), a column (2), a rotary box (3), a power device (4), a transmission device (5), a balance weight (6), a lifting rod (7) and a parallel four Rod mechanism (8), rotary box (3) is connected with the column (2) in rotation, balance weight (6) is fixed on one end of elevating rod (7), parallel four-bar linkage mechanism (8) includes long swing arm (81), short Swing arm (82), balance bar (83) and boom (84), elevating bar (7) is fixedly connected with long swing arm (81), and the connecting shaft of short swing arm (82) and balance bar (83) is provided with There are rollers (85), characterized in that the front end of the boom (84) is provided with a grabbing device (9), and the grabbing device (9) includes two clamping claws (91), a connecting rod (92 ) and the connecting rod (93), the two clamping claws (91) are arranged at both ends of the connecting rod (92), the connecting rod (93) is arranged in the middle of the connecting rod (92), and the connecting rod (93) and The boom (84) is rotationally connected, and the clamping claw (91) is a symmetrical four-bar linkage mechanism, including a pull rod a (911), a pull rod b (912), a clamping rod a (913) and a clamping rod b (914), one end of the pull rod a (911) is hinged with the connecting rod (92), the other end of the pull rod a (911) is hinged with the clamping rod b (914), one end of the pull rod b (912) is hinged with the connecting rod (92), and the pull rod The other end of b (912) is hinged with clamping rod a (913), and clamping rod a (913) and clamping rod b (914) are arc rods, and clamping rod a (913) and clamping rod b (914) ) middle hinge. 2. The balance crane according to claim 1, characterized in that the clamping rod a (913) and the clamping rod b (914) are generally semicircular in a clamped state. 3. The balance crane according to claim 1 or 2, characterized in that the upper surface of the revolving box (3) is provided with a box guide rail (34), and one end of the box guide rail (34) is vertically fixed with a limit rod (35 ), the roller (85) is rollingly connected with the casing guide rail (34). 4.  The balance crane according to claim 1 or 2, characterized in that the power device (4) is a cylinder (41), and the transmission device (5) includes a guide rail (51), a sliding shaft (52) and a coupling ( 53), the cylinder (41) and the guide rail (51) are fixed on the side of the rotary box (3), the elevating rod (7) and the long swing arm (81) are fixed together by the sliding shaft (52), and the sliding shaft (52) and The guide rail (51) is slidingly connected, the piston rod of the cylinder (41) is fixedly connected with the shaft coupling (53), and the shaft coupling (53) is rotationally connected with the sliding shaft (52). 5. The balance crane according to claim 4, characterized in that the upper and lower ends of the guide rail (51) are provided with limit blocks (511). 6. The balance crane according to claim 1 or 2, characterized in that one end of the lower surface of the vehicle seat (1) is provided with a universal wheel (11), and the other end is provided with a fixed caster wheel (12).

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