CN216472124U - Cantilever crane and high-altitude operation car - Google Patents

Abstract

The embodiment of the utility model discloses cantilever crane and high altitude construction car, the cantilever crane includes: the main arm is rotatably connected to the vehicle body of the overhead working truck; the folding arm is hinged with the main arm; the first transfer piece is hinged with the folding arm; the fixing piece is fixedly connected with the first rotating piece and is used for connecting a working bucket of the overhead working truck; the connecting rod is arranged in parallel with the folding arm, and two ends of the connecting rod are respectively hinged to the main arm and the first switching piece; the folding arm, the connecting rod, the main arm and the first switching piece form a parallelogram connecting rod mechanism. Under the condition that the height of the vehicle body is fixed, the length of the folding arm can be longer, so that the overall height of the arm support during lifting can be increased, the condition that the working bucket touches the ground during contraction can be avoided, and the lifting height of the arm support is effectively increased to adapt to high-altitude operation projects with different heights.

Description

Cantilever crane and high-altitude operation car

Technical Field

The utility model relates to an engineering machine tool technical field particularly, relates to an cantilever crane and high altitude construction car.

Background

The high-altitude operation vehicle is a special device which can move and lift a working bucket to a high-altitude designated position by controlling the action of an arm support after a worker and related equipment are borne by the working bucket, and is mainly applied to the operation fields of fire-fighting rescue, installation and maintenance, airplane deicing and the like. The working bucket is usually installed at the tail end of an arm support of the overhead working truck, and the working bucket is required to be kept in a horizontal state all the time in the movement process of the arm support.

In the related art, a leveling mechanism is usually arranged to keep the working bucket horizontal at all times, however, the lifting height of the boom is affected after the boom in the related art is provided with the leveling mechanism.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an cantilever crane and high altitude construction car can improve the height of lifting of cantilever crane.

The utility model discloses cantilever crane is applied to high altitude construction car, include: the main arm is rotatably connected to the vehicle body of the overhead working truck; the folding arm is hinged with the main arm; the first rotating piece is hinged with the folding arm; the fixing piece is fixedly connected with the first rotating piece and is used for connecting a working bucket of the overhead working truck; the connecting rod is arranged in parallel with the folding arm, and two ends of the connecting rod are respectively hinged to the main arm and the first switching piece; wherein the folding arm, the connecting rod, the main arm and the first transfer member constitute a parallelogram linkage.

According to some embodiments of the present invention, the connecting rod comprises a rod body and a telescopic head, the telescopic head is along the axial direction of the rod body is telescopically connected to the rod body, the rod body or the telescopic head is hinged to the main arm or the first adaptor.

According to some embodiments of the present invention, the arm support further comprises a first driving source and a push rod assembly, the push rod assembly comprises a connecting member and a swing rod, one end of the connecting member is hinged to the main arm, two ends of the swing rod are hinged to the folding arm and the connecting member respectively, and two ends of the first driving source are hinged to the folding arm and the other end of the connecting member respectively;

wherein the swing link comprises a curved bar.

According to some embodiments of the utility model, the cantilever crane still includes the regulating part, the mounting with first adaptor articulates in first pin joint, the both ends of regulating part respectively with first adaptor with the mounting articulates in second pin joint and third hinge joint point, first pin joint the second pin joint with third hinge joint point constitutes a triangle-shaped.

According to some embodiments of the present invention, the adjusting member comprises a fixing portion and a telescopic portion, the telescopic portion telescopically connected to the fixing portion, just the fixing portion with the telescopic portion respectively with the first adapting member with the fixing member is articulated mutually.

According to some embodiments of the present invention, the arm support further comprises a bracket and a second driving source, the bracket is hinged to the fixing member for supporting the working bucket;

and two ends of the second driving source are respectively hinged with the fixing piece and the bracket so as to drive the bracket to swing relative to the fixing piece.

According to some embodiments of the utility model, the main arm includes fixed arm, flexible arm and second adaptor, the one end of flexible arm telescopically connect in the fixed arm, flexible arm is kept away from the other end of fixed arm is fixed to be equipped with the second adaptor, the connecting rod articulate in the second adaptor.

The utility model discloses high altitude construction car, including automobile body and above-mentioned arbitrary one the cantilever crane, the cantilever crane sets up on the automobile body.

According to some embodiments of the utility model, aerial working car still includes rotation mechanism, rotation mechanism includes base and gyration portion, the base sets up on the automobile body, gyration portion rotatably connect in the base, the cantilever crane with the gyration portion is connected.

According to some embodiments of the present invention, the aerial work platform further comprises a rotation driving mechanism disposed on the rotation portion for driving the rotation portion to rotate relative to the base;

the rotary part is connected to the base through a rotary supporting bearing, and the rotary driving mechanism comprises a worm and gear speed reducer.

An embodiment of the above utility model has at least the following advantages or beneficial effects:

the utility model discloses the connecting rod and the folding arm parallel arrangement of cantilever crane, and both ends articulate respectively in main arm and first adaptor, like this, the connecting rod that plays the leveling effect can not increase the length direction's of folding arm size, that is to say, under the highly certain condition of automobile body, the length dimension of the folding arm of this embodiment can be done longer, whole height when both can increasing the cantilever crane like this and lift, the condition that the work fill touched to the ground can not appear again when the shrink, the lift height of cantilever crane has effectively been increased, in order to adapt to the high altitude construction project of not co-altitude.

Drawings

Fig. 1 is a schematic view of an aerial work platform according to an embodiment of the present invention.

Fig. 2 and fig. 3 respectively show schematic diagrams of two different viewing angles of the arm support according to the embodiment of the present invention.

Fig. 4 is an exploded view of the push rod assembly according to an embodiment of the present invention.

Fig. 5 is a schematic view illustrating the working bucket of the embodiment of the present invention disposed at the end of the arm support.

Fig. 6 shows a partial enlarged view at a in fig. 2.

Fig. 7 is an exploded view of the first adapter according to an embodiment of the present invention.

Fig. 8 is a schematic view of a swing mechanism according to an embodiment of the present invention.

Fig. 9 shows a partial enlarged view at B in fig. 8.

Fig. 10 is a schematic view illustrating the boom according to the embodiment of the present invention in different positions.

Wherein the reference numerals are as follows:

1. overhead working truck

10. Vehicle body

20. Rotary mechanism

30. Arm support

40. Working bucket

50. Deicing fluid tank and injection system

100. Main arm

110. Fixed arm

120. Telescopic arm

130. Third driving source

140. Fourth drive source

200. Folding arm

300. Second adaptor

400. First adapter

401. Connecting shaft

402. Projecting part

410. First vertical plate

411. First shaft hole

412. Second shaft hole

420. Second vertical plate

421. Third shaft hole

422. Fourth shaft hole

430. First rotating shaft

440. Second rotating shaft

450. Third rotating shaft

460. First joint

470. Second joint

480. Second shaft gear

510. Fixing piece

520. Adjusting part

521. Fixing part

522. Expansion part

530. Bracket

540. Second driving source

600. Connecting rod

610. Rod body

620. Telescopic head

710. A first drive source

720. Push rod assembly

721. Connecting piece

7211. Vertical plate

7212. Shaft sleeve

722. Swing link

723. Pin shaft

724. First shaft stopper

810. Base seat

820. Turning part

830. Rotary driving mechanism

840. Slewing bearing

841. Inner ring

842. Outer ring

O1, first hinge point

O2, second hinge point

O3, third hinge point

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

As shown in fig. 1, fig. 1 is a schematic view of an aerial work platform 1 according to an embodiment of the present invention. It should be noted that the aerial working platform 1 of the embodiment of the present invention is a special device that after the working bucket 40 carries the working personnel and the related devices, the arm support 30 is controlled to move and lift the working bucket 40 to the specified position in the sky. The overhead working truck 1 can be an overhead rescue truck, a fire truck, an airplane deicing vehicle and the like. In the present embodiment, for convenience of description, the aerial platform 1 is taken as an aircraft deicing vehicle as an example, but the invention should not be limited thereto. Wherein the aircraft may be a fighter.

The utility model discloses high altitude construction car 1 includes: the vehicle body 10, the slewing mechanism 20, the arm support 30, the working bucket 40 and the deicing fluid tank and injection system 50. The vehicle body 10 may include a chassis, a cab, tires, and the like. The swing mechanism 20 is disposed on the vehicle body 10, and the boom 30 is rotatably disposed on the vehicle body 10 through the swing mechanism 20. The movement and lifting of the boom 30 may be controlled by a hydraulic control system. The working bucket 40 is arranged at the tail end of the arm support 30, and the working bucket 40 can bear an operator, a deicing spray device and a control console. The deicing fluid tank and injection system 50 is arranged on the vehicle body 10, and an operator can stand in the working bucket 40 to complete the control of the arm support 30 and the injection work of the deicing fluid.

It is to be understood that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

As shown in fig. 2 and 3, fig. 2 and 3 respectively show schematic diagrams of two different viewing angles of the arm support 30 according to the embodiment of the present invention. The utility model discloses cantilever crane 30 includes: main arm 100, folding arm 200, first coupler 400, mount 510, and link 600.

The main arm 100 is rotatably connected to the vehicle body 10 of the aerial work vehicle 1. The folding arm 200 is hinged to the main arm 100, and the first transfer member 400 is hinged to the folding arm 200. The fixing member 510 is fixedly connected to the first adapter 400, and is used for connecting the working bucket 40 of the aerial platform truck 1. It should be noted that the fixing member 510 and the first rotating member 400 may be integrally formed, or may be fixedly connected. The link 600 is disposed in parallel with the folding arm 200, and both ends are hinged to the main arm 100 and the first hinge 400, respectively; wherein the folding arm 200, the link 600, the main arm 100, and the first transfer unit 400 constitute a parallelogram linkage. The bucket 40 may be a frame structure formed by welding a plurality of steel pipes, or may be made of Glass Fiber Reinforced Plastic (GFRP).

It is to be understood that, in the embodiments of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model discloses cantilever crane 30, through adopting folding arm 200 to articulate mutually with main arm 100, the both ends of connecting rod 600 articulate respectively in main arm 100 and first adaptor 400, and just folding arm 200, connecting rod 600, main arm 100 and first adaptor 400 constitute a parallelogram link mechanism's design for when folding arm 200 was swung for main arm 100, parallelogram link mechanism enabled mounting 510 and main arm 100 to remain a fixed contained angle throughout. It should be noted that the fixed angle may be zero or 180 degrees, so that the fixed member 510 and the main arm 100 are parallel to each other. Of course, the fixed included angle may be other angles such as 1 degree, 2 degrees, 3 degrees, 4 degrees, 5 degrees, 10 degrees, 15 degrees, and the like, which is not particularly limited by the present invention.

Referring to fig. 1 to 3, the connecting rod 600 of the arm support 30 according to the embodiment of the present invention is disposed parallel to the folding arm 200, and two ends of the connecting rod 600 are respectively hinged to the main arm 100 and the first adaptor 400, in other words, the connecting rod 600 of the embodiment is disposed at a side of the folding arm 200. Thus, the connecting rod 600 playing a leveling role does not increase the size of the folding arm 200 in the length direction, that is, under the condition that the height of the vehicle body 10 is fixed, the length of the folding arm 200 of the embodiment can be made longer, so that the overall height of the arm support 30 during lifting can be increased, the condition that the working bucket 40 touches the ground when the arm support 30 is retracted is avoided, and the lifting height of the arm support 30 is effectively increased to adapt to high-altitude work projects with different heights.

It will be appreciated that increasing the length of the folding arm 200 may be done as follows: the length of the folding arm 200 is increased or the folding arm 200 is made telescopic.

In one embodiment, the two links 600 are hinged to the main arm 100 and the first connector 400 at both ends of the two links 600, and each link 600 forms a parallelogram linkage with the folding arm 200, the first connector 400 and the main arm 100, i.e., two parallelogram linkages are formed in this embodiment.

It is to be understood that the number of the links 600 is not particularly limited, and may be two or more. For example, the number of links 600 may be one, two, three, four, or other number.

The link 600 includes a rod 610 and a telescopic head 620, the telescopic head 620 is telescopically connected to the rod 610 along an axial direction of the rod 610, and the rod 610 or the telescopic head 620 is hinged to the main arm or the first hinge 400.

The length of the connecting rod 600 can be adjusted by the telescopic head 620 telescopically connected to the rod 610 along the axial direction of the rod 610. Thus, when the connecting rod 600 is installed on the main arm 100 and the first adapter 400, the length of the connecting rod 600 can be adjusted by adjusting the telescopic head 620, so that the length of the connecting rod 600 is equal to that of the folding arm 200, and the situation that the connecting rod 600 is pressed or pulled in the swinging process is effectively avoided.

In this embodiment, the telescopic head 620 is connected to the rod 610 by a screw.

It is understood that a single linkage 600 may include one or more rods 610 and one or more telescoping heads 620. For example, a link 600 includes a rod body 610 and a telescopic head 620, wherein one end of the telescopic head 620 is hinged to the main arm 100, and the other end is screwed to one end of the rod body 610. The other end of the rod 610 is hinged to the first hinge 400. Thus, by adjusting the telescoping head 620, the length of the linkage 600 can be adjusted.

Alternatively, one link 600 may include one rod body 610 and two telescopic heads 620, the two telescopic heads 620 are respectively telescopically connected to two ends of the rod body 610, and the two telescopic heads 620 are respectively hinged to the main arm 100 and the first adapter 400.

Or, one link includes two rod bodies 610 and one telescopic head 620, both ends of the telescopic head 620 are respectively screwed with one ends of the two rod bodies 610, and the other ends of the two rod bodies 610 are respectively hinged with the main arm 100 and the first adaptor 400.

As shown in fig. 3 to 5, fig. 4 is an exploded view of the push rod assembly 720 according to an embodiment of the present invention. Fig. 5 is a schematic diagram illustrating the working bucket 40 of the embodiment of the present invention disposed at the end of the arm support 30.

The arm support 30 of the embodiment of the present invention further includes a first driving source 710 and a push rod assembly 720, the push rod assembly 720 includes a connecting element 721 and a swing rod 722, one end of the connecting element 721 is hinged to the main arm 100, two ends of the swing rod 722 are hinged to the folding arm 200 and the connecting element 721 respectively, two ends of the first driving source 710 are hinged to the other ends of the folding arm 200 and the connecting element 721 respectively; wherein the swing link 722 includes a curved lever.

In one embodiment, the first driving source 710 may be a hydraulic cylinder, a pneumatic cylinder, or the like.

When the first driving source 710 operates, a pushing or pulling force of the first driving source 710 may be transmitted to the folding arm 200 by the push rod assembly 720 so that the folding arm 200 can swing with respect to the main arm 100.

In this embodiment, the push rod assembly 720 is effective to assist in the lifting of the folding arm 200. In addition, the swing link 722 of the present embodiment is a curved lever, which can better accommodate the arc of the movement of the folding arm 200 when lifted, so that the first driving source 710 and the connecting member 721 can be closer to the folding arm 200. Thus, as shown in fig. 1, since the first driving source 710 and the connecting member 721 can be located closer to the folding arm 200, when the arm support 30 is in the retracted state (i.e., the main arm 100 is located closer to the roof and the folding arm 200 is located closer to the front side of the cab), the first driving source 710 does not interfere with the movement of the windshield glass of the cab and the roof.

With continued reference to fig. 3-5, the connector 721 includes an upright 7211 and a sleeve 7212, the sleeve 7212 can be coupled to the upright 7211 by welding, and the axis of the sleeve 7212 is perpendicular to the upright 7211. In this embodiment, two parallel vertical plates 7211 are connected by two bushings 7212. A pin shaft 723 penetrates through each shaft sleeve 7212, and a gap is formed between the outer wall of the pin shaft 723 and the inner wall of each shaft sleeve 7212, so that the pin shaft 723 can rotate relative to the shaft sleeves 7212. One end of the swing link 722 is fixedly connected to the pin 723, and the other end is rotatably connected to the folding arm 200. The swing link 722 may be disposed between the pin 723 and the first stop 724, and the first stop 724 may be fixedly connected to an end surface of the pin 723 by a fastener such as a screw.

As shown in fig. 5 and 6, fig. 6 is a partially enlarged view of a portion a in fig. 2. The arm support 30 further includes an adjusting member 520, the fixing member 510 is hinged to the first hinge point O1 with the first hinge member 400, two ends of the adjusting member 520 are respectively hinged to the second hinge point O2 and the third hinge point O3 with the first hinge member 400 and the fixing member 510, and the first hinge point O1, the second hinge point O2 and the third hinge point O3 form a triangle.

In this embodiment, three hinge points formed by the fixing member 510, the adjusting member 520 and the first coupling member 400 form a triangle to ensure the stability of the connection between the fixing member 510 and the first coupling member 400.

The adjusting member 520 includes a fixing portion 521 and an expansion portion 522, the expansion portion 522 is telescopically connected to the fixing portion 521, and the fixing portion 521 and the expansion portion 522 are respectively hinged to the first connecting member 400 and the fixing member 510. Since the length of the adjusting member 520 is adjustable, the angle between the fixing member 510 and the first adapter 400 can be adjusted to adjust the angle between the fixing member 510 and the horizontal plane, so as to adjust the initial horizontal state of the bucket 40. For example, when the bucket 40 is slightly tilted after being mounted on the fixing member 510, the horizontal state of the bucket 40 can be finely adjusted by adjusting the extendable portion 522.

In this embodiment, the fixing portion 521 and the expansion portion 522 may be connected by a screw. The fixing portion 521 is hinged to the first rotating member 400, and the expansion portion 522 is hinged to the fixing member 510.

Of course, the fixing portion 521 may be hinged to the fixing member 510, and the expansion portion 522 may be hinged to the first rotating member 400.

With continued reference to fig. 5, the arm support 30 further includes a bracket 530 and a second driving source 540, wherein the bracket 530 is hinged to the fixing member 510 for supporting the working bucket 40. The second driving source 540 is hinged to the fixing member 510 and the bracket 530 at both ends thereof, respectively, to drive the bracket 530 to swing with respect to the fixing member 510.

In one embodiment, the second driving source 540 may be a hydraulic cylinder, a pneumatic cylinder, or the like.

When the second driving source 540 is operated, the pushing or pulling force of the second driving source 540 may drive the bracket 530 to swing with respect to the fixing member 510 to adjust the horizontal state of the bucket 40 on the bracket 530.

Specifically, referring to fig. 10, due to the action of the parallelogram linkage, the main arm 100 and the fixing element 510 always form a fixed included angle, so that when the main arm 100 tilts up and down, the fixing element 510 also tilts up and down synchronously, and at this time, the bracket 530 is pushed by the second driving source 540 to swing relative to the fixing element 510, so that the bucket 40 is always kept in a horizontal state.

Referring back to fig. 2, the bracket 530 may have a trapezoidal structure for better supporting the bucket 40, but not limited thereto.

Referring to fig. 3, the main arm 100 includes a fixed arm 110, a telescopic arm 120 and a second adaptor 300, one end of the telescopic arm 120 is telescopically coupled to the fixed arm 110, the other end of the telescopic arm 120, which is far away from the fixed arm 110, is fixedly provided with the second adaptor 300, and the connecting rod 600 is hinged to the second adaptor 300.

Specifically, the boom 30 further includes a third driving source 130 and a fourth driving source 140, two ends of the third driving source 130 are respectively hinged to the swing mechanism 20 and the fixed arm 110, and one end of the fixed arm 110 away from the telescopic arm 120 is hinged to the swing mechanism 20, so that when the third driving source 130 works, the fixed arm 110 can be driven to pitch relative to the swing mechanism 20, thereby achieving the lifting of the boom 30. Meanwhile, the fixed arm 110 can also realize 360-degree rotation through the swing mechanism 20 to realize lateral displacement.

A fourth drive source 140 may be disposed within stationary arm 110 to drive the telescoping of telescoping arm 120.

In one embodiment, the third and fourth drive sources 130 and 140 may each be a hydraulic cylinder, a pneumatic cylinder, or the like.

As shown in fig. 7, fig. 7 is an exploded view of the first adapter 400 according to the embodiment of the present invention. The first adapter 400 includes a first vertical plate 410 and a second vertical plate 420, and the first vertical plate 410 and the second vertical plate 420 are spaced apart from each other and are fixedly connected by a connecting shaft 401. The adjusting member 520 is hinged to the protrusion 402 of the connecting shaft 401. The first vertical plate 410 is provided with a first shaft hole 411 and a second shaft hole 412, the second vertical plate 420 is provided with a third shaft hole 421 and a fourth shaft hole 422, and the positions of the second shaft hole 412 and the third shaft hole 421 are correspondingly arranged.

The first rotating member 400 further includes a first rotating shaft 430, a second rotating shaft 440 and a third rotating shaft 450, the first rotating shaft 430 is disposed through the first shaft hole 411, and the first rotating shaft 430 can rotate in the first shaft hole 411. The second shaft 440 penetrates the second shaft hole 412 and the third shaft hole 421, the second shaft 440 can rotate in the second shaft hole 412 and the third shaft hole 421, the folding arm 200 is fixedly connected with the second shaft 440, the fixing member 510 is fixedly connected with the second shaft 440, or the second shaft 440 is fixedly arranged in the second shaft hole 412 and the third shaft hole 421, the folding arm 200 is rotatably connected with the second shaft 440, and the fixing member 510 is rotatably connected with the second shaft 440. The third shaft 450 is disposed through the fourth shaft hole 422, and the third shaft 450 can rotate in the fourth shaft hole 422.

The first joint 400 further includes a first joint 460 and a second joint 470, the first joint 460 is connected to one of the links 600 and is fixedly mounted on the first rotating shaft 430 through a second shaft stopper 480, and the second joint 470 is connected to the other link 600 and is fixedly mounted on the third rotating shaft 450 through the second shaft stopper 480.

It is understood that before the first rotating shaft 430, the second rotating shaft 440 and the third rotating shaft 450 are installed in the shaft holes, grease may be applied to the outer wall of the rotating shafts to increase the flexibility of rotation.

As shown in fig. 8 and 9, fig. 8 is a schematic view of the swing mechanism 20 according to the embodiment of the present invention. Fig. 9 shows a partial enlarged view at B in fig. 8. The swing mechanism 20 of the embodiment of the present invention includes a base 810 and a swing portion 820, the base 810 is disposed on the vehicle body 10, the swing portion 820 is rotatably connected to the base 810, and the arm support 30 is connected to the swing portion 820. When the rotation part 820 rotates relative to the base 810, the arm support 30 can be driven to rotate, and the transverse displacement of the arm support 30 is realized.

In this embodiment, by providing the base 810, a certain height is added to the entire arm support 30 in the vertical direction, so that the number of sections of the arm support 30 can be reduced to a certain extent, and the space occupied by the arm support 30 is reduced.

In one embodiment, the base 810 is a cylindrical structure, and the diameter of the base 810 is about 400 mm. Because the aerial working platform 1 of this embodiment is an airplane deicing vehicle, the working bucket 40 at the end of the boom 30 only needs to bear the weight of workers, so the diameter of the base 810 of this embodiment is smaller, and on the premise of meeting the structural strength, the space is saved for other components, and the space utilization rate is improved.

The aerial work platform 1 further comprises a rotation driving mechanism 830 which is arranged on the rotation part 820 and used for driving the rotation part 820 to rotate relative to the base 810, the rotation part 820 is connected to the base 810 through a rotation supporting bearing 840, and the rotation driving mechanism 830 comprises a worm gear speed reducer.

Specifically, the slew support bearing 840 includes an inner race 841 and an outer race 842, the inner race 841 being disposed within the outer race 842, and the inner race 841 and the outer race 842 being rotatably coupled. The bottom of the base 810 is fixedly attached to the vehicle body 10, for example, by bolting. Outer race 842 of slew support bearing 840 is fixedly disposed on the top surface of base 810. The inner race 841 of the rotary support bearing 840 is fixedly connected to the rotary portion 820. In this manner, the turnback 820 is rotatably coupled to the base 810 by the inner and outer circles 842.

The outer wall of the outer ring 842 of the rotary support bearing 840 is provided with a tooth part, and an output gear of the worm gear reducer is meshed with the tooth part. When the worm gear reducer works, the worm gear reducer is arranged on the revolving part 820, and an output gear of the worm gear reducer is meshed with a tooth part of the outer ring 842, so that the output gear of the worm gear reducer can revolve along the outer ring 842, and the revolving part 820 is driven to rotate 360 degrees relative to the base 810.

Compare the mode that adopts the motor drive gyration portion motion among the correlation technique, the embodiment of the utility model provides an adopt worm gear speed reducer and slewing bearing 840's mode, it is more stable to compare motor drive performance.

Of course, it is understood that the teeth engaged with the output gear of the worm gear reducer may be provided on the inner wall of the inner ring 841 of the slewing bearing 840. Specifically, the inner ring 841 is fixedly connected to the base 810, the outer ring 842 is fixedly connected to the rotary part 820, and the worm gear reducer is fixedly connected to the rotary part 820. The output gear of the worm gear reducer is meshed with the teeth of the inner ring 841. In this way, the output gear of the worm gear reducer can revolve along the inner ring 841, and further, the rotary part 820 is driven to rotate 360 degrees relative to the base 810.

As shown in fig. 10, fig. 10 is a schematic view illustrating the boom 30 according to the embodiment of the present invention in different positions. Position a is the highest position reached by the working bucket 40 of the embodiment of the present invention, for example, 14 meters. Position C is the maximum working radius reached by the working bucket 40 of the embodiment of the present invention, for example, 7.4 meters. Wherein, the center position of the maximum working radius is the position of the slewing mechanism 20. The position E is the position of the working bucket 40 when the arm support 30 of the embodiment of the present invention is in the retracted state. The position B and the position D are intermediate positions of the bucket 40.

To sum up, the utility model discloses cantilever crane 30 and high altitude construction car 1's advantage and beneficial effect include at least:

the connecting rod 600 of the arm support 30 is parallel to the folding arm 200, and two ends of the connecting rod 600 are respectively hinged to the main arm 100 and the first rotating connector 400, so that the connecting rod 600 playing a leveling role can not increase the size of the folding arm 200 in the length direction, that is, under the condition that the height of the vehicle body 10 is fixed, the length size of the folding arm 200 of the embodiment can be made longer, so that the overall height of the arm support 30 during lifting can be increased, the condition that the working bucket 40 touches the ground during contraction can not occur, and the lifting height of the arm support 30 is effectively increased to adapt to high-altitude work projects with different heights.

The term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.

Claims (10)

1. The utility model provides a cantilever crane, is applied to high altitude construction car which characterized in that includes:

the main arm is rotatably connected to the body of the overhead working truck;

the folding arm is hinged with the main arm;

the first adapter is hinged with the folding arm;

the fixing piece is fixedly connected with the first rotating piece and is used for connecting a working bucket of the overhead working truck;

the connecting rod is arranged in parallel with the folding arm, and two ends of the connecting rod are respectively hinged to the main arm and the first switching piece; wherein the folding arm, the link, the main arm, and the first adapter constitute a parallelogram linkage.

2. The boom according to claim 1, wherein the connecting rod comprises a rod body and a telescopic head, the telescopic head is telescopically connected to the rod body along an axial direction of the rod body, and the rod body or the telescopic head is hinged to the main arm or the first rotating part.

3. The boom according to claim 1, characterized in that the boom further comprises a first driving source and a push rod assembly, the push rod assembly comprises a connecting piece and a swing rod, one end of the connecting piece is hinged to the main arm, two ends of the swing rod are respectively hinged to the folding arm and the connecting piece, two ends of the first driving source are respectively hinged to the folding arm and the other end of the connecting piece;

wherein the swing link comprises a curved bar.

4. The boom according to claim 1, characterized in that the boom further comprises an adjusting member, the fixing member is hinged to a first hinge point with the first hinge member, two ends of the adjusting member are respectively hinged to a second hinge point and a third hinge point with the first hinge member and the fixing member, and the first hinge point, the second hinge point and the third hinge point form a triangle.

5. The arm support according to claim 4, wherein the adjusting member comprises a fixing portion and a telescopic portion, the telescopic portion is telescopically connected to the fixing portion, and the fixing portion and the telescopic portion are respectively hinged to the first rotating member and the fixing member.

6. The boom according to claim 1, characterized in that the boom further comprises a bracket and a second driving source, wherein the bracket is hinged to the fixing member and used for supporting the working bucket;

and two ends of the second driving source are respectively hinged with the fixing piece and the bracket so as to drive the bracket to swing relative to the fixing piece.

7. The boom support according to claim 1, wherein the main arm comprises a fixed arm, a telescopic arm and a second adapter, one end of the telescopic arm is telescopically connected to the fixed arm, the other end of the telescopic arm, which is far away from the fixed arm, is fixedly provided with the second adapter, and the connecting rod is hinged to the second adapter.

8. An aerial work platform, characterized by comprising a vehicle body and an arm support of any one of claims 1 to 7, wherein the arm support is arranged on the vehicle body.

9. The aerial lift truck of claim 8 further comprising a slewing mechanism, the slewing mechanism comprising a base and a slewing portion, the base disposed on the truck body, the slewing portion rotatably coupled to the base, the boom coupled to the slewing portion.

10. The aerial lift truck of claim 9 further comprising a slew drive mechanism disposed on the slew portion for driving the slew portion to rotate relative to the base;

the rotary part is connected to the base through a rotary supporting bearing, and the rotary driving mechanism comprises a worm and gear speed reducer.

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