Lifting device for aerial work platform

Abstract

A lifting device for an aerial work platform comprises a stand column and a telescopic arm capable of ascending and descending in the height direction of the stand column, a lifting base used for loading the telescopic arm is arranged on the side wall of the stand column, and a lifting mechanism used for controlling the telescopic arm to ascend and descend is arranged in the lifting base. A limiting piece used for limiting and guiding lifting of the lifting base is further arranged in the lifting base, and the limiting piece and the lifting base synchronously ascend and descend on the stand column. Compared with the prior art, the lifting mechanism drives the lifting seat and the telescopic arm to synchronously ascend and descend on the stand column, meanwhile, the limiting piece is arranged in the lifting seat, and in the process that the lifting mechanism drives the lifting seat to ascend and descend, the limiting piece limits and guides ascending and descending of the lifting seat, so that the situation that the lifting mechanism is separated from the stand column due to shaking of the stand column is avoided; the lifting seat falls off from the top of the stand column, and the connecting stability of the lifting seat and the stand column is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aerial work devices, and in particular to a lifting device for an aerial work platform. Background Art

[0002] An aerial work platform refers to a movable mechanical equipment used for operations at a certain height. The platform lifts workers, tools, materials, etc. to a certain position for construction, installation, maintenance, etc., and provides safety protection for the workers.

[0003] The aerial work platform achieves vertical and lateral movement through mechanized movement, avoiding the risk of manual climbing. At the same time, the platform is equipped with a protective valve to prevent the lifting platform from overloading and hydraulic pipeline rupture, as well as an emergency descending device in the event of a power outage, which greatly improves the safety of the operation process. The aerial work platform is mainly used for various high-altitude operations, maintenance, decoration, etc., as well as up and down transportation of goods between working floors; lifting of cars between the floors of flat garages and open garages, etc. Specifically, it is widely used in many industries such as construction, equipment installation, maintenance, municipal administration, electricity, street lights, advertising, communications, photography, gardening, transportation, docks, airports and ports, and large industrial and mining enterprises.

[0004] A Chinese patent application with application number 202310773231.5 discloses an aerial work platform for ship painting. The aerial work platform disclosed above includes a platform vehicle, a column, a sliding frame, a lifting mechanism, a telescopic arm, a swing adjustment cylinder, and a platform; the column is arranged on the platform vehicle, the sliding frame is slidably connected to the column, the lifting mechanism is arranged between the sliding frame and the column, the telescopic arm is hinged to the sliding frame, the two ends of the swing adjustment cylinder are respectively hinged to the sliding frame and the telescopic arm, and the platform is arranged at the telescopic end of the telescopic arm. Chinese patent application number 201210464290.6 discloses an aerial work platform, which includes: a lift motor; a reducer driven by the lift motor; a guide frame having a rack, the rack meshing with a gear on an output shaft of the reducer; and a roller disposed outside the guide frame to play a guiding role, wherein the reducer and the lift motor are mounted on a transmission plate, the transmission plate is mounted on a drive frame, and the roller of the drive frame rotates on a main chord rod.

[0005] In the above-mentioned prior art disclosed, the telescopic arm is connected to the sliding frame, and the lifting mechanism drives the telescopic arm and the sliding frame to rise and fall synchronously on the column. However, when the sliding frame and the telescopic arm are gradually raised along the column, the column will shake at a high position, resulting in poor connection stability between the sliding frame and the column, which can easily cause the sliding frame to fall from the top of the column. There is a risk of the telescopic arm falling downward along with the sliding frame, and there is a safety hazard to the workers on the platform. Summary of the invention

[0006] The present invention aims to overcome the defects in the above-mentioned prior art and provide a lifting device for an aerial work platform which ensures stable lifting of a telescopic arm without the risk of falling and improves the safety of workers.

[0007] In order to achieve the above-mentioned invention objectives, the present invention adopts the following technical solutions: a lifting device for an aerial work platform, comprising a column and a telescopic arm that can be lifted and lowered along the height direction of the column, a lifting seat for loading the telescopic arm is provided on the side wall of the column, a lifting mechanism for controlling the lifting of the telescopic arm is provided in the lifting seat, and a limit member for limiting and guiding the lifting and lowering of the lifting seat is also provided in the lifting seat, and the limit member and the lifting seat are lifted and lowered synchronously on the column.

[0008] As a preferred solution of the present invention, a rack is provided on the side wall of the column along the height direction of the column, and the limiting member is in contact with the rack.

[0009] As a preferred solution of the present invention, at least two limiting members that abut against the rack at the same time are provided on one side of the rack, and the at least two limiting members are distributed along the height direction of the rack.

[0010] As a preferred solution of the present invention, the lifting mechanism includes a lifting reducer arranged on the lifting seat and a gear connected to the output end of the lifting reducer, and the gear is meshed with the rack.

[0011] As a preferred solution of the present invention, the limiting member and the gear are respectively located on opposite sides of the rack.

[0012] As a preferred solution of the present invention, the gear is located between two limiting members.

[0013] As a preferred solution of the present invention, the limiting member is a pulley rotatably arranged in the lifting seat, and the pulley is rollingly connected to the back side of the rack.

[0014] As a preferred solution of the present invention, the telescopic arm is rotatably connected to the side of the lifting seat, and a platform is provided at the end of the telescopic arm.

[0015] As a preferred solution of the present invention, a fixing seat for supporting the column is provided at the bottom of the column.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The lifting seat and the telescopic arm are driven to rise and fall synchronously on the column by the lifting mechanism. At the same time, a limiter is provided in the lifting seat. When the lifting mechanism drives the lifting seat to rise and fall, the limiter limits and guides the lifting of the lifting seat, thereby preventing the lifting mechanism from being separated from the column due to the shaking of the column, causing the lifting seat to fall from the top of the column, and improving the connection stability between the lifting seat and the column; 2. Furthermore, by setting a limit piece to abut against the back of the rack, the gear of the lifting mechanism is meshed with the rack. When the lifting seat rises to the top of the column, the gear will not be detached from the rack under the action of the limit piece, thereby ensuring the connection stability between the lifting mechanism and the column, thereby preventing the lifting seat from falling from the top of the column, and improving the safety of personnel on the working platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the column of the present invention Reference numerals: column 1 , rack 101 , fixed seat 2 , lifting seat 3 , limit member 301 , pulley 3011 , telescopic arm 4 , platform 401 , lifting mechanism 5 , lifting reducer 501 , gear 502 . DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1-Figure 2 As shown, a lifting device for an aerial work platform comprises a column 1 and a telescopic arm 4 which is lifted and lowered along the height direction of the column 1, a lifting seat 3 for loading the telescopic arm 4 is provided on the side wall of the column 1, a lifting mechanism 5 for controlling the lifting and lowering of the telescopic arm 4 is provided in the lifting seat 3, and a limiting member 301 for limiting and guiding the lifting and lowering of the lifting seat 3 is also provided in the lifting seat 3, and the limiting member 301 and the lifting seat 3 are lifted and lowered synchronously on the column 1.

[0020] Furthermore, the lifting seat 3 is a hollow rectangular structure with openings at the upper and lower ends. The lifting seat 3 is sleeved on the column 1. Under the action of the lifting mechanism 5, the lifting seat 3 is driven to move up and down along the column 1, thereby driving the telescopic arm 4 to move up and down.

[0021] Specifically, a rack 101 is provided on the side wall of the column 1 and is arranged along the height direction of the column 1. The limiter 301 abuts against the rack 101. Furthermore, the rack 101 is arranged on the side of the column 1. The length of the rack 101 is the same as the height of the column 1. The side of the rack 101 is tightly attached to the surface of the column 1, that is, the tooth surface of the rack 101 is perpendicular to the side of the column 1.

[0022] In order to further enhance the stability of the lifting seat 3 on the column 1, at least two limit members 301 are provided on one side of the rack 101, which are simultaneously in contact with the rack 101, and the at least two limit members 301 are distributed along the height direction of the rack 101, and the at least two limit members 301 are both arranged on the same side of the rack 101, that is, the back side of the rack 101, and a certain distance is left between each limit member 301, and several limit members 301 are arranged on the inner side of the lifting seat 3, and the specific number of limit members 301 needs to be determined according to the height size of the lifting seat 3 to ensure the stable lifting of the lifting seat 3.

[0023] In addition, the lifting mechanism 5 includes a lifting reducer 501 arranged on the lifting seat 3, and a gear 502 connected to the output end of the lifting reducer 501, and the gear 502 is meshed with the rack 101. Further, the lifting reducer 501 is fixedly arranged on the lifting seat 3, the gear 502 is connected to the output end of the lifting reducer 501, and the gear 502 is meshed with the rack 101, that is, the lifting mechanism 5 realizes the lifting and lowering of the lifting seat 3 through the cooperation of the gear 502 and the rack 101. Since the lifting seat 3 is sleeved on the column 1, in order to leave space for the cooperation between the gear 502 and the rack 101, a slider is set on an inner side surface of the lifting seat 3 to slide with the column 1, and the slider is set on both sides of the lifting seat 3 to leave space in the middle to set the cooperation structure of the gear 502 and the rack 101.

[0024] Next, the limiter 301 is in contact with the rack 101, and the limiter 301 and the gear 502 are respectively located on opposite sides of the rack 101. Further, the limiter 301 is fixedly arranged on the inner side of the lifting seat 3, and the limiter is in contact with the back side of the rack 101. At the same time, the limiter 301 and the gear 502 are located on both sides of the rack 101. When the lifting reducer 501 drives the gear 502 to rotate on the rack 101, thereby driving the lifting seat 3 to rise and fall on the column 1, the limiter 301 is synchronously lifted and lowered with the lifting seat 3. During the lifting and lowering process of the lowering seat 3, the limit member 301 always abuts against the back side of the rack 101, and when the lifting seat 3 rises to the top of the column 1, the column 1 shakes slightly. Under the action of the limit member 301, the gear 502 is always engaged with the rack 101, and the gear 502 will not be separated from the rack 101. The connection between the gear 502 and the rack 101 is limited by the limit member 301, which ensures that the gear 502 will not be separated from the rack 101, thereby preventing the lifting seat 3 from falling.

[0025] In addition, the gear 502 is located between the two limit members 301. Specifically, when only two limit members 301 are provided, the two limit members 301 are respectively located on the upper and lower sides of the gear 502, ensuring that during the lifting process of the lifting seat 3, the two limit members 301 provide limits for the meshing distance between the gear 502 and the rack 101 on the upper and lower sides of the gear 502, thereby avoiding the limit members 301 being located on the same side of the gear 502 to cause the force to be not concentrated, and causing the lifting seat 3 to tilt at the upper and lower ends during the lifting process.

[0026] When the number of the limiting members 301 is greater than two, the limiting members 301 are evenly distributed along the height direction of the lifting seat 3, and each limiting member 301 abuts against the back of the rack 101. At the same time, the gear 502 is located in the middle of the limiting members 301 to ensure stable lifting of the lifting seat 3.

[0027] The limiting member 301 is a pulley 3011 rotatably disposed in the lifting seat 3, and the pulley 3011 is rollingly connected to the back of the rack 101. Further, the pulley 3011 is rotatably connected to the lifting seat 3. When the lifting seat 3 is lifted or lowered on the column 1, the pulley 3011 abuts against the back of the rack 101 and rolls on the back of the rack 101 along the height direction of the rack 101.

[0028] In the prior art, when the lifting seat 3 rises to the top of the column 1, the top of the column 1 is prone to shaking due to the high height of the column 1, which makes the connection between the lifting mechanism 5 and the column 1 unstable, and the lifting mechanism 5 is easily separated from the column 1, thereby causing the lifting seat 3 to fall from the top of the column 1. In order to solve this problem, a limiting member 301 is provided in the lifting seat 3. The limiting member 301 cooperates with the gear 502 in the lifting mechanism 5 and the column 1 to achieve connection limitation of the lifting mechanism 5 and the column 1, that is, to limit the connection between the lifting mechanism 5 and the column 1 in the horizontal direction, thereby ensuring that the shaking of the column 1 will not cause the lifting mechanism 5 to separate from the column 1, thereby ensuring that the lifting seat 3 will not fall from the top of the column 1.

[0029] Furthermore, by abutting the limit member 301 against the back side of the rack 101, the gear 502 of the lifting mechanism 5 is meshed with the rack 101. When the lifting seat 3 rises to the top of the column 1, the limit member 301 prevents the gear 502 from detaching from the rack 101, thereby ensuring the connection stability between the lifting mechanism 5 and the column 1, thereby preventing the lifting seat 3 from falling from the top of the column 1, and improving the safety of personnel on the working platform.

[0030] The telescopic arm 4 is rotatably connected to the side of the lifting seat 3, and a platform 401 is provided at the end of the telescopic arm 4. Furthermore, the telescopic arm 4 can rotate up and down around the connecting axis between the telescopic arm 4 and the lifting seat 3 under the action of the hydraulic device. At the same time, the telescopic arm 4 can adjust the length of the entire telescopic arm 4 by telescoping, and then adjust the position of the platform 401 at the end of the telescopic arm 4, so as to meet the position adjustment of the platform 401.

[0031] A fixing seat 2 for supporting the column 1 is provided at the bottom of the column 1. Furthermore, the fixing seat 2 is installed on the vehicle body, and the entire device is driven to move through the vehicle body, thereby improving the convenience of the device.

[0032] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0033] Although the following terms are used more frequently in this article: column 1, rack 101, fixed seat 2, lifting seat 3, stopper 301, pulley 3011, telescopic arm 4, platform 401, lifting mechanism 5, lifting reducer 501, gear 502, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A lifting device for an aerial work platform, comprising a column (1) and a telescopic arm (4) that can be lifted and lowered along the height direction of the column (1), characterized in that: A lifting seat (3) for loading the telescopic arm (4) is provided on the side wall of the column (1); a lifting mechanism (5) for controlling the lifting of the telescopic arm (4) is provided inside the lifting seat (3); and a limiting member (301) for limiting and guiding the lifting of the lifting seat (3) is also provided inside the lifting seat (3); the limiting member (301) and the lifting seat (3) are synchronously lifted and lowered on the column (1).

2. A lifting device for an aerial work platform according to claim 1, characterized in that: A rack (101) is provided on the side wall of the column (1) and is arranged along the height direction of the column (1), and the limiting member (301) is in contact with the rack (101).

3. A lifting device for an aerial work platform according to claim 2, characterized in that: At least two limiting members (301) that are in contact with the rack (101) are provided on one side of the rack (101), and the at least two limiting members (301) are distributed along the height direction of the rack (101).

4. The lifting device for an aerial work platform according to claim 2, characterized in that: The lifting mechanism (5) comprises a lifting reducer (501) arranged on the lifting seat (3) and a gear (502) connected to the output end of the lifting reducer (501), and the gear (502) is meshed with the rack (101).

5. A lifting device for an aerial work platform according to claim 4, characterized in that: The limiting member (301) and the gear (502) are respectively located on two opposite sides of the rack (101).

6. A lifting device for an aerial work platform according to claim 4, characterized in that: The gear (502) is located between the two limiting members (301).

7. The lifting device for an aerial work platform according to claim 2, characterized in that: The limiting member (301) is a pulley (3011) rotatably arranged in the lifting seat (3), and the pulley (3011) is rollingly connected to the back side of the rack (101).

8. The lifting device for an aerial work platform according to claim 1, characterized in that: The telescopic arm (4) is rotatably connected to the side of the lifting seat (3), and a platform (401) is provided at the end of the telescopic arm (4).

9. The lifting device for an aerial work platform according to claim 1, characterized in that: A fixing seat (2) for supporting the column (1) is provided at the bottom of the column (1).

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