CN213171376U - Crank arm type high-altitude vehicle extension structure - Google Patents
Crank arm type high-altitude vehicle extension structure Download PDFInfo
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- CN213171376U CN213171376U CN202021601088.XU CN202021601088U CN213171376U CN 213171376 U CN213171376 U CN 213171376U CN 202021601088 U CN202021601088 U CN 202021601088U CN 213171376 U CN213171376 U CN 213171376U
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Abstract
The utility model discloses a crank arm formula high-altitude vehicle extending structure, this crank arm formula high-altitude vehicle extending structure includes the pull-up rod, go up folding arm, go up the maincenter, the maincenter down, the pull-down rod, folding arm down, first flexible actuating lever, the flexible actuating lever of second and flexible main arm, the pull-down rod rotates to be connected in the maincenter down, folding arm rotates to be connected in the maincenter down, go up pull-up rod and last folding arm and connect in maincenter and maincenter down, the connection of first flexible actuating lever is in folding arm and folding arm down, the flexible actuating lever of second is connected in flexible main arm and last maincenter, flexible main arm is connected in last maincenter, and the center pin of flexible main arm sets up with the central line is coaxial with last main. The utility model discloses a crank arm formula high altitude car extending structure makes the focus of folding arm, lower folding arm and flexible main arm placed in the middle simultaneously through forming the big four-bar linkage in two cross-sections, consequently, has formed simple structure, stable, and the high altitude car that does not have the structure unbalance loading, has solved the problem that the high altitude car side turned over.
Description
Technical Field
The utility model relates to a high altitude car technical field especially relates to a crank arm formula high altitude car extending structure.
Background
The high-altitude vehicle is an advanced high-altitude operation machine, can greatly improve the working efficiency, safety and comfort of air constructors, reduces the labor intensity, and is widely applied in developed countries. The use of the aerial work platform in China is wider and wider, the aerial work platform is initially used for municipal street lamp maintenance, garden tree pruning and the like, and along with the rapid development of economy in China, the demand of engineering construction, industrial installation, equipment maintenance, factory building maintenance, shipbuilding, electric power, municipal administration, airports, communication, gardens, traffic and the like on the aerial work platform is continuously increased.
However, the existing crank arm type overhead crane arm frame structure has the disadvantages of complex structure, high manufacturing cost and high energy consumption, and the main arm structure is easy to generate structural unbalance loading due to the offset, has poor stability and is easy to generate side rollover. Therefore, how to improve the existing crank arm can ensure simple structure and ensure stability becomes a problem which needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an embodiment of the utility model provides a desire provides a crank arm formula high-altitude vehicle extension structure that simple structure, prevent unbalance loading, stability are high.
The technical scheme of the utility model is realized like this:
a crank arm type high-altitude vehicle stretching structure comprises an upper pull rod, an upper folding arm, an upper center, a lower pull rod, a lower folding arm, a first telescopic driving rod, a second telescopic driving rod and a telescopic main arm, one end of the lower pull rod is fixed, the other end of the lower pull rod is rotatably connected with the lower center, one end of the lower folding arm is fixed, the other end of the lower folding arm is rotatably connected with the lower center, the two ends of the upper pull rod and the upper folding arm are respectively connected with the upper center and the lower center at the same time, two ends of the first telescopic driving rod are respectively and rotatably connected with the upper folding arm and the lower folding arm, two ends of the second telescopic driving rod are respectively connected with the telescopic main arm and the upper center in a rotating way, one end of the telescopic main arm is rotatably connected to the upper center, and a central shaft of the telescopic main arm is coaxial with a central line of the upper center.
Preferably, the lower pull rod is hinged to the lower center, the lower folding arm is hinged to the lower center, two ends of the upper pull rod are hinged to the upper center and the lower center, two ends of the upper folding arm are hinged to the upper center and the lower center, and the main telescopic arm is hinged to the upper center.
Preferably, the lower pull rod is connected with the lower center, the lower folding arm is connected with the lower center through pin shafts, two ends of the upper pull rod are respectively connected with the upper center and the lower center, two ends of the upper folding arm are respectively connected with the upper center and the lower center through pin shafts, and the main telescopic arm is connected with the upper center through pin shafts.
Preferably, the number of the lower pull rods and the number of the upper pull rods are two, the two lower pull rods are symmetrically distributed on the lower folding arm at intervals, and the two upper pull rods are symmetrically distributed below the upper folding arm at intervals.
Preferably, the upper folding arm and the lower folding arm comprise two side frames and support shafts arranged between the side frames, one end of the driving oil cylinder is connected with the support shafts of the upper folding arm in a rotating mode, and the other end of the driving oil cylinder is connected with the support shafts of the lower folding arm in a rotating mode.
Preferably, the side frame is provided with a mounting hole, and two ends of the supporting shaft penetrate through the mounting hole of the side frame and are fixedly connected with the side frame.
Preferably, the first telescopic driving rod and the second telescopic driving rod are oil cylinders.
Preferably, the folding device further comprises a linkage rod, wherein two ends of the linkage rod are rotatably connected to the lower center and are respectively rotatably connected with the upper folding arm and the lower folding arm.
Preferably, flexible main arm includes mobile jib, telescopic link, holds up portion and first leveling cylinder, the telescopic link is inserted and is located in the mobile jib and can follow the mobile jib slides, hold up the portion rotate connect in the telescopic link is kept away from the one end of mobile jib, the one end of first leveling cylinder rotate connect in telescopic link, the other end connect in hold up the portion.
Preferably, the device further comprises a second leveling oil cylinder, one end of the second leveling oil cylinder is connected with the upper center, the other end of the second leveling oil cylinder is connected with the telescopic main arm, and oil passages of the second leveling oil cylinder and the first leveling oil cylinder are communicated with each other.
The embodiment of the utility model provides a crank arm type high-altitude vehicle extension structure forms a four-bar linkage mechanism through the lower pull rod, the lower folding arm and the lower center which are connected in a rotating way, and forms two four-bar linkage mechanisms with large cross sections through the four-bar linkage mechanism formed by the upper pull rod, the upper folding arm, the upper center and the lower center which are connected in a rotating way; meanwhile, the center axis of the telescopic main arm is coaxial with the center line of the upper center, so that the gravity centers of the upper folding arm, the lower folding arm and the telescopic main arm are centered, and therefore, a crank arm type high-altitude vehicle stretching structure which is simple and stable in structure and free of structural unbalance loading is formed, and the problem of side turning of the high-altitude vehicle is effectively solved.
Drawings
Fig. 1 is a schematic structural view of a crank arm type high-altitude vehicle extending structure provided by the present invention;
fig. 2 is a perspective view of the extending structure of the crank arm type high-altitude vehicle shown in fig. 1.
Detailed Description
In order to illustrate embodiments of the present invention or technical solutions in the prior art more clearly, the following description will be made in conjunction with the accompanying drawings in embodiments of the present invention to describe the technical solutions in the embodiments of the present invention clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Please refer to fig. 1 and fig. 2 in combination, wherein fig. 1 is a schematic structural diagram of a crank arm type high-altitude vehicle extending structure according to the present invention; fig. 2 is a perspective view of the extending structure of the crank arm type high-altitude vehicle shown in fig. 1. The crank arm type high-altitude vehicle stretching structure comprises an upper pull rod 1, an upper folding arm 3, an upper center 4, a lower center 5, a lower pull rod 6, a lower folding arm 7, a linkage rod 8 with two ends rotatably connected to the lower center 5, a first telescopic driving rod 9 with two ends simultaneously connected to the upper folding arm 3 and the lower folding arm 7, a telescopic main arm 11 with the end rotatably connected to the upper center, and a second telescopic driving rod 12 with two ends respectively rotatably connected to the telescopic main arm 11 and the upper center 4, wherein the first telescopic driving rod 9 is respectively rotatably connected with the upper folding arm 3 and the lower folding arm 7 for driving the upper folding arm 3 and the lower folding arm 7 to move, the upper pull rod 1 and the upper folding arm 3 are arranged in parallel, two ends of the upper center 4 and the lower center 5 are simultaneously connected, the lower pull rod 6 and the lower folding arm 7 are arranged in parallel at intervals, and one end of the upper pull rod 1 and the lower folding arm, The other end is connected with the lower central pivot 5.
One end of the lower pull rod 6 is fixed on a rotary table of the self-walking aerial work platform, and the other end of the lower pull rod is rotatably connected with the lower center 5. One end of the lower folding arm 7 is also fixed on a rotary table of the self-walking aerial work platform, and the other end of the lower folding arm is rotatably connected with the lower center 5, so that the lower pull rod 6, the lower folding arm 7 and the lower center 5 form a four-bar linkage; moreover, both ends of the upper pull rod 1 are respectively connected to the upper center 4 and the lower center 5; two ends of the upper folding arm 3 are respectively connected with the upper center 4 and the lower center 5, so that the upper pull rod 1, the upper folding arm 3, the upper center 4 and the lower center 5 which are connected in a rotating mode form a four-bar mechanism, therefore, the two four-bar mechanisms form a large-section and stable connecting structure, no unbalance loading exists between the lower folding arm 7 and the upper folding arm 3, and the probability of rollover of the high-altitude vehicle is reduced.
Two ends of the linkage rod 8 are rotatably connected to the lower center 5 and are respectively rotatably connected with the upper folding arm 3 and the lower folding arm 7, so that linkage is formed between the upper folding arm 3 and the lower folding arm 7 under the driving of the first telescopic driving rod 9, and synchronous motion of the upper folding arm 3 and the lower folding arm 7 is ensured.
Specifically, in this embodiment, the lower pull rod 6 is hinged to the lower center 5, the lower folding arm 7 is hinged to the lower center 5, two ends of the upper pull rod 1 are hinged to the upper center 4 and the lower center 5, two ends of the upper folding arm 3 are hinged to the upper center 4 and the lower center 5, respectively, and the main telescopic arm 11 is hinged to the upper center 4. Preferably, in this embodiment, the lower pull rod 6 is connected to the lower center 5, the lower folding arm 7 is connected to the lower center 5 through a pin, two ends of the upper pull rod 1 are connected to the upper center 4 and the lower center 5, two ends of the upper folding arm 3 are connected to the upper center 4 and the lower center 5 through a pin, and the main telescopic arm 11 is connected to the upper center 4 through a pin.
The lower pull rods 6 and the upper pull rods 1 are two, the lower pull rods 6 are symmetrically distributed on the lower folding arm 7 at intervals, and the upper pull rods are symmetrically distributed below the upper folding arm 3 at intervals.
Two ends of the first telescopic driving rod 9 are respectively connected with the upper folding arm 3 and the lower folding arm 7 in a rotating mode, and the telescopic motion of the first telescopic driving rod 9 can enable the upper center 4 to always keep parallel to a fixed point of the rotary table during up-and-down motion.
Specifically, go up folding arm 3 with folding arm 7 down all includes two limit framves 31 and locates two back shaft 33 between the limit frame 31, the one end of first flexible actuating lever 9 rotate connect in go up folding arm 3 back shaft 33, the other end rotate connect in folding arm 7 down back shaft 33, first flexible actuating lever 9 is through the drive back shaft 33 moves and drives folding arm 3 is gone up with folding arm 7 motion down, like this, through first flexible actuating lever 9 promotes simultaneously last folding arm 3 with folding arm 7's mode down has solved the problem that the pin joint stress that the single armed atress leads to concentrates, has also guaranteed folding arm 7 down with folding arm 3's drive power.
Specifically, in this embodiment, the side frame 31 is provided with a mounting hole, and two ends of the support shaft 33 penetrate through the mounting hole of the side frame 31 to be fixedly connected with the side frame 31.
Specifically, in the present embodiment, the side frame 31 has a long strip-shaped plate structure, so that the supporting shaft 33 can be conveniently installed.
The end of one end of the main telescopic arm 11 is rotatably connected to the upper hub 4, and the central axis of the main telescopic arm 11 is coaxially disposed with the central axis of the upper hub 4, so that the main telescopic arm 11 is maintained at the middle position of the upper hub 4, and thus the central axis of the main telescopic arm 11 is parallel to the central axis of the upper folding arm 3, and the center of gravity of the main telescopic arm 11, the upper folding arm 3 and the lower folding arm 7 is centered, thereby preventing the main telescopic arm 11, the upper folding arm 3 and the lower folding arm 7 from being unbalanced.
Flexible main arm 11 includes mobile jib 111, telescopic link 113, holds up portion 115 and first leveling cylinder 117, telescopic link 113 is inserted and is located in the mobile jib 111 and can follow the mobile jib 111 slides, hold up portion 115 rotate connect in telescopic link 113 keeps away from the one end of mobile jib 111, the one end of first leveling cylinder 117 rotate connect in telescopic link, the other end connect in hold up portion 115 is used for the drive hold up portion 115 rotates, hold up and be provided with the platform on the portion 115, the structure is nimble.
Specifically, in this embodiment, the first telescopic driving rod 9 and the second telescopic driving rod 12 are both oil cylinders. Of course, in other embodiments, the first telescopic driving rod 9 and the second telescopic driving rod 12 may be cylinders.
In another embodiment, the extension structure of the crank arm type overhead working truck further includes a second leveling cylinder 13, one end of the second leveling cylinder 13 is connected to the upper hub 4, the other end of the second leveling cylinder 13 is connected to the main telescopic arm 11, and oil passages of the second leveling cylinder 13 and the first leveling cylinder 117 are communicated with each other. When the second telescopic driving rod 12 pushes the telescopic main arm 11 to do ascending motion, the second leveling cylinder 13 extends, and hydraulic oil in a rod cavity of the second leveling cylinder 13 generates high pressure to extrude the hydraulic oil into a rodless cavity of the first leveling cylinder 117, so that the purpose of automatically adjusting the platform of the high-altitude vehicle is achieved.
The embodiment of the utility model provides a crank arm type high-altitude vehicle extension structure forms a four-bar linkage mechanism through the lower pull rod, the lower folding arm and the lower center which are connected in a rotating way, and forms two four-bar linkage mechanisms with large cross sections through the four-bar linkage mechanism formed by the upper pull rod, the upper folding arm, the upper center and the lower center which are connected in a rotating way; meanwhile, the center axis of the telescopic main arm is coaxial with the center line of the upper center, so that the gravity centers of the upper folding arm, the lower folding arm and the telescopic main arm are centered, and therefore, a crank arm type high-altitude vehicle stretching structure which is simple and stable in structure and free of structural unbalance loading is formed, and the problem of side turning of the high-altitude vehicle is effectively solved.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A crank arm type high-altitude vehicle stretching structure is characterized by comprising an upper pull rod, an upper folding arm, an upper center, a lower pull rod, a lower folding arm, a first telescopic driving rod, a second telescopic driving rod and a telescopic main arm, one end of the lower pull rod is fixed, the other end of the lower pull rod is rotatably connected with the lower center, one end of the lower folding arm is fixed, the other end of the lower folding arm is rotatably connected with the lower center, the two ends of the upper pull rod and the upper folding arm are respectively connected with the upper center and the lower center at the same time, two ends of the first telescopic driving rod are respectively and rotatably connected with the upper folding arm and the lower folding arm, two ends of the second telescopic driving rod are respectively connected with the telescopic main arm and the upper center in a rotating way, one end of the telescopic main arm is rotatably connected to the upper center, and a central shaft of the telescopic main arm is coaxial with a central line of the upper center.
2. The extending structure of a crank arm type high altitude vehicle as claimed in claim 1, wherein the lower pull rod is hinged to the lower center, the lower folding arm is hinged to the lower center, both ends of the upper pull rod are hinged to the upper center and the lower center, both ends of the upper folding arm are hinged to the upper center and the lower center, respectively, and the main telescopic arm is hinged to the upper center.
3. The extending structure of the crank arm type high altitude vehicle as claimed in claim 2, wherein the lower link is connected to the lower center, the lower folding arm is connected to the lower center by a pin, both ends of the upper link are connected to the upper center and the lower center, respectively, both ends of the upper folding arm are connected to the upper center and the lower center by a pin, respectively, and the main telescopic arm is connected to the upper center by a pin.
4. The extension structure of the crank arm type high altitude vehicle as claimed in claim 1, wherein the two lower pull rods and the two upper pull rods are symmetrically spaced above the lower folding arm, and the two upper pull rods are symmetrically spaced below the upper folding arm.
5. The crank arm type high-altitude vehicle extension structure according to claim 1, wherein the upper folding arm and the lower folding arm each include two side frames and a support shaft disposed between the two side frames, and one end of the first telescopic driving rod is rotatably connected to the support shaft of the upper folding arm, and the other end thereof is rotatably connected to the support shaft of the lower folding arm.
6. The extension structure of the crank arm type high-altitude vehicle as claimed in claim 5, wherein the side frame is provided with a mounting hole, and both ends of the support shaft pass through the mounting hole of the side frame to be fixedly connected with the side frame.
7. The crank arm type high altitude vehicle extension structure according to claim 1, wherein the first telescopic driving rod and the second telescopic driving rod are both oil cylinders.
8. The crank arm type high-altitude vehicle extension structure according to claim 1, further comprising a linkage rod, wherein two ends of the linkage rod are rotatably connected to the lower hub and are rotatably connected to the upper folding arm and the lower folding arm respectively.
9. The crank arm type high-altitude vehicle stretching structure according to claim 1, wherein the main telescopic arm includes a main rod, a telescopic rod, a lifting portion, and a first leveling cylinder, the telescopic rod is inserted into the main rod and can slide along the main rod, the lifting portion is rotatably connected to one end of the telescopic rod away from the main rod, one end of the first leveling cylinder is rotatably connected to the telescopic rod, and the other end of the first leveling cylinder is connected to the lifting portion.
10. The extension structure of the crank arm type high-altitude vehicle according to claim 9, further comprising a second leveling cylinder, one end of the second leveling cylinder is connected to the upper hub, the other end of the second leveling cylinder is connected to the main telescopic arm, and oil passages of the second leveling cylinder and the first leveling cylinder are communicated with each other.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021601088.XU CN213171376U (en) | 2020-08-05 | 2020-08-05 | Crank arm type high-altitude vehicle extension structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021601088.XU CN213171376U (en) | 2020-08-05 | 2020-08-05 | Crank arm type high-altitude vehicle extension structure |
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| CN213171376U true CN213171376U (en) | 2021-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114795750A (en) * | 2022-05-26 | 2022-07-29 | 西南交通大学 | Transfer nursing device |
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- 2020-08-05 CN CN202021601088.XU patent/CN213171376U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114795750A (en) * | 2022-05-26 | 2022-07-29 | 西南交通大学 | Transfer nursing device |
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