CN202016834U - Bidirectional fork lifting device of aerial work platform - Google Patents

Abstract

The utility model relates to an aerial work platform, in particular to a bidirectional scissor lifting device for an aerial work platform. A two-way scissor lifting device for aerial work platforms. The scissor member of the device is composed of an outer scissor member and an inner scissor member. The two sets of scissor members are connected by a connecting rod; the bottom outer scissors of the scissor device The lower ends of the member and the inner scissors member at the bottom are respectively hinged with lower sliders, the fuselage is provided with lower rails, the lower sliders are arranged on the lower rails, and a first hinge rod is hinged at the middle of the inner scissor member at the bottom, The lower end of the first articulated rod is hingedly set with the fuselage; the upper ends of the top outer scissors member and the top inner scissors member of the scissors device are respectively hinged with upper sliders, and the bottom of the working platform is provided with upper slide rails, and the upper sliders are set On the upper slide rail, a second hinged rod is hinged at the middle part of the top inner scissors member, and the upper end of the second hinged rod is hingedly arranged with the bottom of the working platform. The utility model has the characteristics of simple structure and good overall stability.

Description

Two-way scissor lifting device for aerial work platform

technical field

The utility model relates to an aerial work platform, in particular to a bidirectional scissor lifting device for an aerial work platform.

Background technique

The existing aerial work platform includes a fuselage, a walking device, a lifting device and a working platform. The working platform is arranged above the lifting device; Barrel lifting device. The scissor lift device is such as the scissor lift device of the aerial work platform disclosed in the Chinese utility model patent (application number: 200720114879.8, application date: 2007-09-14). The scissor lift device includes 2 sets of cross structures and drives 2 A set of oil cylinders with a cross structure, two sets of cross structures are respectively composed of several connecting rods hinged, and the two sets of cross structures are connected by connecting rods. One arm of the cross structure is hingedly arranged on the fuselage, and the other arm is movably arranged on the slide rail of the fuselage through a slide block. For this kind of scissor lifting device, it is suitable for the aerial work platform with an extendable work platform disclosed in the Chinese invention patent (application number: 200710071409.2, application date: 2007-09-24). The movable platform involved in this patent is set on the fixed platform. At the same time, the slider is also arranged on the same side, so that after the aerial work platform is guaranteed to rise, the movable platform can also be kept stable after the movable platform is stretched out. With the further development of aerial work platforms, the working space is becoming more and more large, so it is necessary to have a movable platform that can be extended in both directions, but if the movable platform is extended in both directions, when the other side is extended without sliding blocks It will lead to instability of the platform, and even the danger of rollover.

Contents of the invention

In order to solve the above-mentioned technical problems of the two-way extension of the movable platform of the aerial work platform, the purpose of this utility model is to provide a two-way scissor lifting device for the aerial work platform, which can avoid instability when the movable platform extends in both directions The problem has the characteristics of simple structure and good overall stability.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

Two-way scissor lifting device for aerial work platforms. The scissor lifting device includes a scissor device and a hydraulic cylinder that provides lifting power for the scissor device. The outer scissor member and the inner scissor member are hinged by pins to form a scissor structure, and the two sets of scissor members at the hinge are connected by connecting rods; the scissor device The lower ends of the bottom outer scissors member and the bottom inner scissors member are respectively hinged with lower sliders, the fuselage is provided with lower rails, and the lower sliders are arranged on the lower rails, and in the middle of the bottom inner scissors member A first hinged rod is hinged, and the lower end of the first hinged rod is hinged with the fuselage; the upper ends of the top outer scissors member and the top inner scissors member of the scissors device are respectively hinged with upper sliders, and the working platform The bottom is provided with an upper slide rail, and the upper slider is arranged on the upper slide rail, and a second hinged rod is hinged in the middle of the top inner scissors member, and the upper end of the second hinged rod is hinged with the bottom of the working platform.

As a further improvement, the above-mentioned inner scissor members are respectively the first inner scissor member, the second inner scissor member, the third inner scissor member and the fourth inner scissor member, and the first inner scissor member is the described The bottom inner scissors member, the fourth inner scissors member is the top inner scissors member; the outer scissors members are respectively the first outer scissors member, the second outer scissors member, the third outer scissors member and the first outer scissors member Four outer scissor members, the first outer scissor member is the bottom outer scissor member, and the fourth outer scissor member is the top outer scissor member.

As a further improvement, a lower hydraulic cylinder mounting seat is provided between the two first inner scissor members, and an upper hydraulic cylinder mounting seat is provided between the second inner scissor members. The two ends of the hydraulic cylinder They are respectively hingedly arranged on the lower hydraulic cylinder mounting seat and the upper hydraulic cylinder mounting seat.

As a further improvement, the above-mentioned scissors device is provided with a safety support device, the safety support device is composed of a safety support arm and a safety arm positioning device, one end of the safety support arm is hingedly arranged on a connecting rod, and the other end of the safety support arm A fork is provided, and the fork is adapted to the connecting rod directly below the connecting rod that articulates the safety support arm.

As a further improvement, the above-mentioned safety arm positioning device includes a positioning pin and a positioning plate; and a rod is fixed between two inner scissor members on both sides. The positioning plate is set on the inner side of the safety support arm, the positioning plate is arc-shaped, and the upper and lower ends of the positioning plate are respectively provided with positioning holes. When the positioning pin is inserted into the positioning hole at the top of the positioning plate, the safety support The yoke of the arm is supported on a connecting rod adapted thereto. The inner side of the above-mentioned positioning plate can be provided with a gasket, and the gasket is made of PA6 material.

As a further improvement, the above-mentioned safety support arm is composed of an upper plate, a lower plate, two vertical rods and a crosspiece connected, the upper plate and the lower plate are respectively arranged at the two ends of the two vertical rods, and the fork-shaped mouth is set On the lower plate, the upper plate is provided with a fixing groove, and the four sides on both sides of the fixing groove are respectively provided with fixing ports; the outer side of the connecting rod is provided with a support tube, and the two sides of the support tube are respectively provided with annular grooves , the annular groove is provided with two external clamps and one internal clamp, the two external clamps are clamped on both sides of the internal clamp to form an annular mouth buckled on the circular groove, and the two ends of the internal clamp and the external clamp are respectively A protruding block is provided, and bolts are arranged on the protruding block to fix the inner chuck and the outer chuck, and the fixing mouth is buckled on the protruding block. As a preference, the external head and the two inner chucks are all made of PA6 material.

As a further improvement, the above-mentioned positioning pin is composed of a handle, a positioning pin shaft, a guide rod seat, a return spring and a fixing nut, the guide rod seat is arranged on the fixing plate through the fixing nut, and one end of the positioning pin shaft is threadedly connected to the handle. The other end protrudes the guide rod seat through the guide rod seat, and the back-moving spring is arranged in the guide rod seat, and one end of the back-moving spring is offset with the guide bar seat, and the other end is offset with the protruding ring on the positioning pin.

As a further improvement, gaskets are provided between the two upper and lower inner scissor members, and gaskets are provided between the two upper and lower outer scissor members.

Because the utility model adopts the above-mentioned technical scheme, when the device is raised, the lower slider and the upper slider slide to both sides at the same time, which can avoid the problem of instability when the movable platform extends in both directions, and at the same time , when the utility model does not have a movable platform for two-way extension, its stability is also better than the aerial work platform disclosed in the Chinese utility model patent (application number: 200720114879.8 application date: 2007-09-14). The utility model has a structure Simple, overall stable and good features.

Description of drawings

Fig. 1 is a schematic diagram of the installation structure of the present utility model.

Fig. 2 is a left side view of Fig. 1 .

Fig. 3 is a schematic diagram of the structure among the fuselage, the scissor lifting device, the fixed work platform and the movable work platform.

Fig. 4 is a left side view of Fig. 3 .

Fig. 5 is a structural schematic diagram of the utility model.

Fig. 6 is a left side view of Fig. 5 .

Fig. 7 is a schematic structural diagram of the utility model in a raised state.

Fig. 8 is a schematic diagram of the installation structure of the safety support device.

FIG. 9 is a top view of FIG. 8 .

Fig. 10 is a structural schematic diagram of the safety support arm.

Fig. 11 is the left view of Fig. 10.

FIG. 12 is a schematic diagram of the installation structure of the positioning bolt 21 .

Detailed ways

Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.

As shown in Figure 1 and Figure 2, the aerial work platform consists of a fuselage 1, a machine base 2, a wheel traveling device 3, an engine body 4, a scissor lifting device, a fixed operating platform 6, a platform guardrail 7, The platform locking device 8, the fuselage support device 9 and the movable operation platform 10 are composed, the wheel running device 3 is arranged on the fuselage 1, the fuselage support device 9 is arranged on the four corners of the fuselage 1, and the fixed operation platform 6 is arranged On the scissor lifting device, the working platform is composed of a fixed working platform 6 and a movable working platform 10 arranged at both ends of the fixed working platform 6 , and a platform locking device 8 is arranged on the movable working platform 10 .

As shown in Figure 3 and Figure 4, the two-way scissor lifting device of the above-mentioned aerial work platform includes a scissor device 5 and a hydraulic cylinder 14 that provides lifting power for the scissor device 5, and the two sides of the scissor device 5 are respectively scissor members. , the scissor member is composed of an outer scissor member and an inner scissor member. The outer scissor member and the inner scissor member are hinged to form a scissor structure through pin shafts, and a connection is provided between the two sets of scissor members at the hinged part. Rod 17 is connected. A buffer sheet 40 is provided between the two upper and lower inner scissor members, and a buffer sheet 40 is provided between the two upper and lower outer scissor members. As shown in Fig. 5, Fig. 6 and Fig. 7, the inner scissors members are respectively the first inner scissors member 51, the second inner scissors member 52, the third inner scissors member 53 and the fourth inner scissors member 54; The outer scissor members are a first outer scissor member 55 , a second outer scissor member 56 , a third outer scissor member 57 and a fourth outer scissor member 58 . The lower ends of the first outer scissor member 55 and the first inner scissor member 51 of the scissor device 5 are respectively hinged with a lower slider 50, the fuselage 1 is provided with a lower rail 11, and the lower slider 50 is arranged on the lower On the rail 11, and in the middle part of the first inner scissor member 51, the first hinged rod 12 is hinged, and the lower end of the first hinged rod 12 is hingedly arranged with the fuselage 1; the fourth outer scissors member of the scissors device 5 58 and the upper end of the fourth inner scissor member 54 are respectively hinged with an upper slider 59, and the bottom of the fixed working platform 6 is provided with an upper slide rail 60, and the upper slider is arranged on the upper slide rail 60, and the fourth inner The middle part of the scissors member 54 is hingedly provided with a second hinged rod 13 , and the upper end of the second hinged rod 13 is hingedly arranged with the bottom of the fixed working platform 6 .

As shown in Figure 5, Figure 6 and Figure 7, a lower hydraulic cylinder mounting seat 15 is provided between the two first inner scissor members 51, and an upper hydraulic cylinder mounting seat is provided between the second inner scissor member 52 16. The two ends of the hydraulic cylinder 14 are hingedly arranged on the lower hydraulic cylinder mounting base 15 and the upper hydraulic cylinder mounting base 15 respectively.

As shown in Figures 8 and 9, the scissors device 5 is provided with a safety support device, the safety support device is composed of a safety support arm 20 and a safety arm positioning device, and one end of the safety support arm 20 is hingedly arranged on a connecting rod 17 , the other end of the safety support arm 20 is provided with a fork 35 , the fork 35 is adapted to the connecting rod 17 directly below the connecting rod 17 of the hinged safety support arm 20 . The safety arm positioning device includes a positioning pin 21 and a positioning plate 22; and between the two second inner scissor members 52 on both sides, the fixed rod 18 is welded with a fixed plate 23, and the positioning pin 21 is set On the fixed plate 23; the positioning plate 22 is arranged on the inner side of the safety support arm 20, the positioning plate 22 is arc-shaped, the inner side of the positioning plate 22 can be provided with a gasket 24, and the gasket 24 is made of PA6 material. The upper and lower ends of the positioning plate 22 are respectively provided with positioning holes 30. When the positioning pin 21 is inserted into the positioning hole 30 on the upper end of the positioning plate 22, the fork-shaped opening 35 of the safety support arm 20 is supported on the connecting rod that matches it. 17 on.

As shown in Figure 10 and Figure 11, the safety support arm 20 is composed of an upper plate 32, a lower plate 33, two vertical rods 31 and a crosspiece 34, and the upper plate 32 and the lower plate 33 are respectively arranged on the two vertical rods 31. At both ends, the forked mouth 35 is arranged on the lower plate 32, and the upper plate 32 is provided with a fixing groove 36, and four sides of the fixing groove 36 are respectively provided with fixing holes 37; The outer sleeve is provided with a support tube 25, and the two sides of the support tube 25 are respectively provided with annular grooves, and two external clamps 27 and inner chucks 26 are arranged on the annular grooves, and the two external clamps 27 and the inner clamps 26 are made of PA6 material . Two outer chucks 27 are clamped on both sides of the inner chuck 26 to form an annular mouth and buckle on the annular groove. The two ends of the inner chuck 26 and the outer chuck 26 are respectively provided with protruding blocks 29, and the protruding blocks 29 Bolts 28 are provided to fix the inner chuck 26 and the outer chuck 26 , and the fixing opening 37 is buckled on the protruding block 29 .

As shown in Figure 12, positioning pin 21 is made of handle 41, positioning pin shaft 43, guide rod seat 42, return spring 44 and fixed nut 45, and guide rod seat 42 is arranged on the fixed plate 23 by fixed nut 45, and positioning pin shaft One end of 43 is threadedly connected with the handle 41, and the other end passes through the guide rod seat 42 to protrude from the guide rod seat 42, and the return spring 44 is arranged in the guide rod seat 42, and one end of the return spring 44 is against the guide rod seat 42, and the other end Contrast with the protruding ring on the positioning pin shaft 43.

Claims (10)

1. Two-way scissor lifting device for aerial work platforms, characterized in that: the scissor lifting device includes a scissor device (5) and a hydraulic cylinder (14) that provides lifting power for the scissor device (5), the scissor device The two sides of (5) are scissor members respectively. The scissor members are composed of outer scissor members and inner scissor members. The two sets of scissor members are connected by connecting rods (17); the lower ends of the bottom outer scissor member and the bottom inner scissor member of the scissor device are respectively hinged with lower sliders (50), and the fuselage (1) There is a lower rail (11) on the top, the lower slider (50) is set on the lower rail (11), and the first hinge rod (12) is hinged in the middle of the inner scissor member at the bottom, and the first hinge The lower end of the rod (12) is hinged with the fuselage (1); the upper ends of the top outer scissor member and the top inner scissor member of the scissor device are respectively hinged with upper sliders (59), and the bottom of the working platform is provided with There is an upper slide rail (60), and the upper slide block (59) is arranged on the upper slide rail (60), and the middle part of the top inner scissor member is hinged to be provided with a second hinged rod (13), and the second hinged rod (13 ) The upper end is hingedly set with the bottom of the working platform. 2. The two-way scissor lifting device for aerial work platforms according to claim 1, characterized in that the inner scissor members are respectively the first inner scissor member (51), the second inner scissor member (52), the second inner scissor member The three inner scissor members (53) and the fourth inner scissor member (54), the first inner scissor member (51) is the bottom inner scissor member, and the fourth inner scissor member (54) is the The top inner scissor member; the outer scissor members are respectively the first outer scissor member (55), the second outer scissor member (56), the third outer scissor member (57) and the fourth outer scissor member ( 58), the first outer scissor member (55) is the bottom outer scissor member, and the fourth outer scissor member (58) is the top outer scissor member. 3. The two-way scissor lifting device for aerial work platforms according to claim 2, characterized in that: a lower hydraulic cylinder mounting seat (15) is provided between the two first inner scissors (51) components, and the second An upper hydraulic cylinder mounting seat (16) is provided between the two inner scissor members (52), and the two ends of the hydraulic cylinder (14) are respectively hingedly arranged on the lower hydraulic cylinder mounting seat (15) and the upper hydraulic cylinder mounting seat ( 16) on. 4. The two-way scissor lifting device for aerial work platforms according to claim 1, 2 or 3, characterized in that: the scissor device is provided with a safety support device, and the safety support device consists of a safety support arm (20) and a safety arm The positioning device is formed, one end of the safety support arm (20) is hingedly arranged on a connecting rod (17), the other end of the safety support arm (20) is provided with a fork (35), and the fork (35) is connected with the hinge The connecting rod (17) directly below the connecting rod (17) of the safety support arm (20) is suitable. 5. The two-way scissor lifting device for aerial work platforms according to claim 4, characterized in that: the safety arm positioning device includes a positioning pin (21) and a positioning plate (22); and two inner scissors on both sides The fixed rod (18) between the components is welded with a fixed plate (23), and the positioning pin (21) is set on the fixed plate (23); the described positioning plate (22) is set on On the inner side of the safety support arm (20), the positioning plate (22) is arc-shaped, and the upper and lower ends of the positioning plate (22) are respectively provided with positioning holes (30), and the positioning pin (21) is inserted into the positioning plate (22) When the positioning hole (30) at the upper end is used, the fork (35) of the safety support arm (20) is supported and arranged on the connecting rod (17) matched therewith. 6. The two-way scissor lifting device for aerial work platforms according to claim 5, characterized in that: a gasket (24) is provided on the inner side of the positioning plate (22), and the gasket (24) is made of PA6 material. 7. The two-way scissor lifting device for aerial work platforms according to claim 4, characterized in that: the safety support arm (20) consists of an upper plate (32), a lower plate (33), two vertical rods (31) and a The crosspieces (34) are connected, the upper plate (32) and the lower plate (33) are respectively arranged at the two ends of the two vertical rods (31), and the fork (35) is arranged on the lower plate (33). The upper plate (32) is provided with a fixing groove (36), and the four sides on both sides of the fixing groove (36) are respectively provided with fixing ports (37); the outer side of the connecting rod (17) is provided with a support tube (25), the two sides of the support pipe (25) are respectively provided with annular grooves, and the annular grooves are provided with two external clamps (27) and an inner chuck (26), and the two external clamps (27) are clamped in the inner clamp Both sides of the head (26) form an annular mouth and buckle on the annular groove, and the two ends of the inner chuck (26) and the outer chuck (27) are respectively provided with a protruding block (29), and the protruding block (29) Bolts (28) are provided to fix the inner chuck (26) and the outer chuck (27), and the fixing port (37) is buckled on the protruding block (29). 8. The two-way scissor lifting device for aerial work platforms according to claim 7, characterized in that: both the two external clamps (27) and one internal clamp (26) are made of PA6 material. 9. The two-way scissor lifting device for aerial work platforms according to claim 4, characterized in that: the positioning bolt (21) is composed of a handle (41), a positioning pin shaft (43), a guide rod seat (42), a return spring (44) and fixed nut (45), the guide bar seat (42) is arranged on the fixed plate (23) through the fixed nut (45), and one end of the positioning pin (43) is connected with the handle (41) by thread, and the other One end passes through the guide rod seat (42) and protrudes from the guide rod seat (42), and the return spring (44) is arranged in the guide rod seat (42), and one end of the return spring (44) is offset against the guide rod seat (42), and the other One end is against the convex ring on the positioning pin shaft (43). 10. The two-way scissor lifting device for aerial work platforms according to claim 1, 2 or 3, characterized in that buffer plates (40) are provided between the two upper and lower inner scissor members, and the two upper and lower inner scissor members Buffer sheets (40) are provided between the lower outer scissor members.

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