Crank arm assembly of overhead working truck

Abstract

According to the crank arm assembly of the overhead working truck, a first plate body, a second plate body and a third plate body are parallel to one another and are perpendicular to a fourth plate body, a gap is reserved between the second plate body and the third plate body, and the second plate body and the third plate body form a second U-shaped groove together; the first plate body is integrally connected with a first extension plate, and the second plate body is integrally connected with a second extension plate; a first shaft seat is fixed on the first plate body, and a second shaft seat is fixed on the second plate body; one end of the first folding arm is hinged between the first extension plate and the second extension plate of the connecting component, and the middle part of the first folding arm is fixedly connected with a third extension plate and a fourth extension plate; the cylinder body end of the driving cylinder is hinged between the first shaft seat and the second shaft seat, and the piston rod end of the driving cylinder is hinged between the third extension plate and the fourth extension plate; and one end of the second folding arm is fixedly mounted in the second U-shaped groove of the connecting component. According to the crank arm assembly of the overhead working truck, the first folding arm and the second folding arm are connected through the integrally-formed connecting component, the structure is stable and reliable, and mounting and dismounting are convenient and fast.

Description

Technical Field

[0001] The utility model belongs to the field of parts of aerial work vehicles, and in particular relates to a crank arm assembly of the aerial work vehicle. Background Art

[0002] Aerial work platforms are products that serve various industries for high-altitude operations, equipment installation, maintenance and other mobile high-altitude operations. Aerial work platforms can be divided into straight-arm and articulated-arm types according to the arm span. The articulated-arm aerial work platform adopts a multi-stage folding-arm combination design, which is flexible and convenient. It can cross certain obstacles and perform multi-point operations in one place. This application relates to a curved-arm assembly of a curved-arm aerial work vehicle.

[0003] The existing articulated boom structure of aerial work vehicles is complex, and installation, disassembly and maintenance are inconvenient. In addition, the stability of the connection between adjacent folding arms determines whether the articulated boom aerial work vehicle is safe and reliable. Utility Model Content

[0004] Based on the content of the background technology, the utility model discloses a crank arm assembly of an aerial work vehicle, which includes a first folding arm, a second folding arm, a connecting member and a driving cylinder;

[0005] The connecting member is integrally composed of a first plate body, a second plate body, a third plate body, and a fourth plate body, the first plate body, the second plate body, and the third plate body are parallel to each other and perpendicular to the fourth plate body, the first plate body, the second plate body, and the third plate body are respectively integrally connected to the fourth plate body, a gap is left between the first plate body and the second plate body, and together with the fourth plate body, a gap is left between the second plate body and the third plate body, and together with the fourth plate body, a second U-shaped groove is formed; one side of the first plate body extends outward and is integrally connected to the first extension plate, and one side of the second plate body extends outward and is integrally connected to the second extension plate, and the first extension plate and the second extension plate are arranged opposite to each other; the first shaft seat is fixedly connected to the outer side of the middle of the first plate body, and the second shaft seat is fixedly connected to the outer side of the middle of the second plate body, and the first shaft seat and the second shaft seat are arranged opposite to each other;

[0006] One end of the first folding arm is hinged between the first extension plate and the second extension plate of the connecting member through a rotating shaft, a third extension plate is fixedly connected to one side of the middle portion of the first folding arm, and a fourth extension plate is fixedly connected to the other side of the middle portion of the first folding arm, and the third extension plate and the fourth extension plate are arranged opposite to each other;

[0007] The cylinder end of the driving cylinder is hinged between the first shaft seat and the second shaft seat through a rotating shaft, and the piston rod end of the driving cylinder is hinged between the third extension plate and the fourth extension plate of the first folding arm through a rotating shaft. The driving cylinder is specifically a hydraulic cylinder. In this way, under the drive of the driving cylinder, the first folding arm can be adjusted in angle;

[0008] One end of the second folding arm is fixedly installed in the second U-shaped groove of the connecting component.

[0009] The above-mentioned integrally formed connecting member has a simple and compact structure, is stable and reliable, and the first U-shaped groove and the second U-shaped groove formed by each plate body and the extended plate formed by extension can facilitate the installation and disassembly of the first folding arm and the second folding arm.

[0010] Furthermore, a groove is provided on the bottom surface of the second folding arm at a position corresponding to the driving cylinder. The provision of the groove can provide the driving cylinder with a larger movement space and the first folding arm with a larger adjustment range.

[0011] Preferably, the first extension plate and the second extension plate of the connecting member are respectively provided with axial holes, and the corresponding ends of the first folding arm are matched with the axial holes on the first extension plate and the second extension plate through a rotating shaft to achieve hinged connection; the first plate body, the second plate body and the third plate body of the connecting member are respectively provided with a plurality of matching fixed mounting holes, and when the second folding arm is set in the second U-shaped groove of the connecting member, a plurality of pin shafts respectively pass through the corresponding fixed mounting holes on the third plate body, the corresponding through holes of the second folding arm, the corresponding fixed mounting holes on the second plate body and the corresponding fixed mounting holes on the first plate body to achieve fixed installation of the second folding arm, such a fixed installation method can make the fixation between the second folding arm and the connecting member firm and stable, and not easy to loosen.

[0012] Furthermore, a support block and a support column are fixedly arranged in the first U-shaped groove of the connecting member and between the first plate body and the second plate body. The support block and the support column also have through holes at positions corresponding to the fixed mounting holes on the first plate body and the second plate body, so that the pin shaft can also pass through the support block and the support column; the arrangement of the support block and the support column can support the first plate body and the second plate body, thereby enhancing the strength and stability of the connecting member.

[0013] Through the above technical solution, the utility model has at least the following beneficial effects:

[0014] The crank arm assembly of the aerial work vehicle described in the present application connects the first folding arm and the second folding arm through an integral connecting member, has a stable and reliable structure, and is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the overall structure of the crank arm assembly of the aerial work vehicle described in the embodiment of the present application;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 Schematic diagram of the overall structure of the connecting component described in the embodiment of this application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0019] In the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship are only used for illustrative purposes and cannot be understood as limiting this patent; if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the said features. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0020] In the description of the utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0021] refer to Figures 1 to 3 A crank arm assembly of an aerial work vehicle includes a first folding arm 1, a second folding arm 2, a connecting member 3 and a driving cylinder 4;

[0022] The connecting member 3 is integrally composed of a first plate body 301, a second plate body 302, a third plate body 303, and a fourth plate body 304. The first plate body 301, the second plate body 302, and the third plate body 303 are parallel to each other and perpendicular to the fourth plate body 304. A gap is left between the first plate body 301 and the second plate body 302, and together with the fourth plate body 304, a gap is left between the second plate body 302 and the third plate body 303, and together with the fourth plate body 304, a second U-shaped groove is formed. One side of the first plate body 301 extends outward and is integrally connected to a first extension plate 305, and one side of the second plate body 302 extends outward and is integrally connected to a second extension plate 306, and the first extension plate 305 and the second extension plate 306 are arranged opposite to each other. A first shaft seat 307 is fixedly connected to the outer side of the middle of the first plate body 301, and a second shaft seat 308 is fixedly connected to the outer side of the middle of the second plate body 302, and the first shaft seat 307 and the second shaft seat 308 are arranged opposite to each other.

[0023] One end of the first folding arm 1 is hinged between the first extension plate 305 and the second extension plate 306 of the connecting member 3 through a rotating shaft, and a third extension plate 101 is fixedly connected to one side of the middle part of the first folding arm 1, and a fourth extension plate 102 is fixedly connected to the other side of the middle part of the first folding arm 1, and the third extension plate 101 and the fourth extension plate 102 are arranged opposite to each other; the cylinder body end of the driving cylinder 4 is hinged between the first shaft seat 307 and the second shaft seat 308 through a rotating shaft, and the piston rod end of the driving cylinder 4 is hinged between the third extension plate 101 and the fourth extension plate 102 of the first folding arm 1 through a rotating shaft. The driving cylinder 4 is specifically a hydraulic cylinder, so that under the drive of the driving cylinder 4, the first folding arm 1 can adjust its angle; a groove 103 is provided on the bottom surface of the second folding arm 2 at the position corresponding to the driving cylinder 4. The setting of the groove 103 can give the driving cylinder 4 a larger movement space, so that the first folding arm 1 has a larger adjustment range; one end of the second folding arm 2 is fixedly installed in the second U-shaped groove of the connecting member 3.

[0024] The above-mentioned integrally formed connecting member 3 has a simple and compact structure, is stable and reliable, and the first U-shaped groove and the second U-shaped groove formed by each plate body and the extended plate formed by extension can facilitate the installation and disassembly of the first folding arm 1 and the second folding arm 2.

[0025] In a specific embodiment, an axial hole 309 is respectively provided on the first extension plate 305 and the second extension plate 306 of the connecting member 3, and the corresponding ends of the first folding arm 1 are matched with the axial holes 309 on the first extension plate 305 and the second extension plate 306 through a rotating shaft to achieve hinged connection; a plurality of matching fixing holes 310 are respectively provided on the first plate body 301, the second plate body 302 and the third plate body 303 of the connecting member 3. When the second folding arm 2 is set in the second U-shaped groove of the connecting member 3, a plurality of pins respectively pass through the corresponding fixing holes 310 on the third plate body 303, the corresponding through holes on the second folding arm 2, the corresponding fixing holes 310 on the second plate body 302 and the corresponding fixing holes 310 on the first plate body 301 to achieve fixed installation of the second folding arm 2. Such a fixed installation method can make the fixation between the second folding arm 2 and the connecting member 3 firm and stable, and not easy to loosen.

[0026] In a further embodiment, a support block 311 and a support column 312 are fixedly arranged in the first U-shaped groove of the connecting member 3 and between the first plate body 301 and the second plate body 302. The support block 311 and the support column 312 also have through holes at positions corresponding to the fixed mounting holes 310 on the first plate body 301 and the second plate body 302, so that the pin shaft can also pass through the support block 311 and the support column 312; the setting of the support block 311 and the support column 312 can support the first plate body 301 and the second plate body 302, thereby enhancing the strength and stability of the connecting member 3.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Based on the present invention and the above description, relevant personnel can make various changes and modifications without departing from the technical idea of ​​the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A crank arm assembly of an aerial work vehicle, characterized in that: The invention comprises a first folding arm (1), a second folding arm (2), a connecting member (3) and a driving cylinder (4); the connecting member (3) is integrally formed by a first plate body (301), a second plate body (302), a third plate body (303) and a fourth plate body (304); the first plate body (301), the second plate body (302) and the third plate body (303) are parallel to each other and perpendicular to the fourth plate body (304); a gap is left between the first plate body (301) and the second plate body (302), and the first plate body (301) and the second plate body (302) together form a first U-shaped groove; the second plate body (302) and the third plate body (303) are interlocked. A gap is left between the first plate body (301) and the second plate body (302) and together with the fourth plate body (304) form a second U-shaped groove; one side of the first plate body (301) extends outwards and is integrally connected with a first extension plate (305); one side of the second plate body (302) extends outwards and is integrally connected with a second extension plate (306); the first extension plate (305) and the second extension plate (306) are arranged opposite to each other; a first shaft seat (307) is fixedly connected to the outer side of the middle part of the first plate body (301); a second shaft seat (308) is fixedly connected to the outer side of the middle part of the second plate body (302); the first shaft seat (307) and the second shaft seat (308) are arranged opposite to each other; One end of the first folding arm (1) is hinged between a first extension plate (305) and a second extension plate (306) of the connecting member (3); a third extension plate (101) is fixedly connected to one side of the middle of the first folding arm (1); a fourth extension plate (102) is fixedly connected to the other side of the middle of the first folding arm (1); the third extension plate (101) and the fourth extension plate (102) are arranged opposite to each other; the cylinder body end of the driving cylinder (4) is hinged between a first shaft seat (307) and a second shaft seat (308); the piston rod end of the driving cylinder (4) is hinged between the third extension plate (101) and the fourth extension plate (102) of the first folding arm (1); and one end of the second folding arm (2) is fixedly installed in a second U-shaped groove of the connecting member (3).

2. The crank arm assembly of an aerial work vehicle according to claim 1, characterized in that: A groove (103) is provided on the bottom surface of the second folding arm (2) at a position corresponding to the driving cylinder (4).

3. The crank arm assembly of an aerial work vehicle according to claim 1, characterized in that: The first extension plate (305) and the second extension plate (306) of the connecting member (3) are respectively provided with an axial hole (309), and the corresponding end of the first folding arm (1) is matched with the axial hole (309) on the first extension plate (305) and the second extension plate (306) through a rotating shaft to achieve hinged connection; the first plate body (301), the second plate body (302) and the third plate body (303) of the connecting member (3) are respectively provided with a plurality of matching fixing holes (310), and when the second folding arm (2) is arranged in the second U-shaped groove of the connecting member (3), a plurality of pins are respectively passed through the corresponding fixing holes (310) on the third plate body (303), the corresponding through holes of the second folding arm (2), the corresponding fixing holes (310) on the second plate body (302) and the corresponding fixing holes (310) on the first plate body (301) in sequence to achieve fixed installation of the second folding arm (2).

4. The crank arm assembly of an aerial work vehicle according to claim 3, characterized in that: A support block (311) and a support column (312) are fixedly arranged in the first U-shaped groove of the connecting member (3) and between the first plate body (301) and the second plate body (302); the support block (311) and the support column (312) are also provided with through holes at positions corresponding to the fixed installation holes (310) on the first plate body (301) and the second plate body (302).

Images