Static holding type cantilever crane of aerial work platform

Abstract

The utility model discloses an aerial work platform static keeping type arm support which comprises a small arm in transmission connection with an aerial work platform and a large arm in rotating connection with the small arm, the large arm is provided with a driving air cylinder used for driving the small arm to longitudinally turn over, and the top of the small arm is provided with an arc-shaped sleeve bent towards the large arm. The top of the large arm is provided with an arc-shaped sliding rod which extends into the arc-shaped sleeve and can slide in the arc-shaped sleeve along an arc-shaped track, the arc-shaped sliding rod is in sliding fit with the arc-shaped sleeve, and the circle center of the arc-shaped sleeve and the circle center of the arc-shaped sliding rod are consistent with the rotating center of the small arm. The utility model has the characteristics that the burden of a connecting structure between the small arm and the large arm is reduced, the loss of parts is reduced, the safety is improved and the like.

Description

Technical Field

[0001] This utility model relates to a static holding boom, specifically a static holding boom for aerial work platforms. Background Technology

[0002] Aerial work platforms are widely used in various industries for high-altitude operations, equipment installation, and maintenance. When working, they are raised to the required height using a long boom, and operators perform corresponding operations on the work platform. The position of the work platform is also adjusted during work to facilitate operation.

[0003] Chinese patent application CN216190894U discloses an aerial work platform boom and an aerial work vehicle. The aerial work platform boom includes: a rotating base, a first connecting seat, a second connecting seat, a first boom section, and a second boom section; the first boom section includes a first link and a second link; the first link, the second link, the rotating base, and the first connecting seat form a first four-bar linkage; the second boom section includes a third link and a fourth link; the third link, the fourth link, the first connecting seat, and the second connecting seat form a second four-bar linkage.

[0004] The boom in the prior art includes a forearm connected to the work platform and a boom used to support the work platform for high-altitude operations. The forearm is usually used to make small adjustments to the level of the work platform, while the boom and forearm are connected by cylinders and a pivot to achieve longitudinal rotation of the forearm. This puts a heavy burden on the support of the forearm, and there is also a large load at the connection between the forearm and the boom. At the same time, when the work platform is at a height, it is prone to swaying, which increases the burden on the connection structure between the forearm and the boom, increases component wear, and poses a danger. Utility Model Content

[0005] The purpose of this utility model is to provide a static holding boom for aerial work platforms, which solves the problems of excessive load on the connection structure, increased component wear, and potential dangers in the existing technology.

[0006] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a static holding boom for an aerial work platform, comprising a forearm that is driven and connected to the work platform and a boom that is rotatably connected to the forearm. The boom is provided with a drive cylinder for driving the forearm to rotate longitudinally. The top of the forearm is provided with an arc-shaped sleeve that bends toward the boom. The top of the boom is provided with an arc-shaped slide rod that extends into the arc-shaped sleeve and can slide along an arc-shaped trajectory within the arc-shaped sleeve. The arc-shaped slide rod is slidably fitted with the arc-shaped sleeve. The centers of the arc-shaped sleeve and the arc-shaped slide rod are both consistent with the rotation center of the forearm.

[0007] As a further preferred technical solution of this utility model, the outer diameter of the arc-shaped slide rod is smaller than the inner diameter of the arc-shaped sleeve, and a sealing plug is provided at one end of the arc-shaped slide rod located inside the arc-shaped sleeve. The outer wall of the sealing plug abuts against and slides against the inner wall of the arc-shaped sleeve.

[0008] As a further preferred technical solution of this utility model, the arc-shaped sleeve is divided into a left cavity and a right cavity by a sealing plug. The left cavity and the right cavity are filled with hydraulic oil and are connected to each other by an external oil pipe.

[0009] As a further preferred technical solution of this utility model, the top of the forearm is provided with a fixing groove, the bottom of the fixing groove is provided with a fixing seat, and the end of the arc-shaped sleeve is connected and fixed to the fixing seat.

[0010] As a further preferred technical solution of this utility model; the fixed base is provided with a liquid passage cavity, one end of the arc-shaped sleeve is provided with a through hole communicating with the liquid passage cavity, and the other end of the arc-shaped sleeve is provided with a sealing cap that slides with the arc-shaped slide rod.

[0011] As a further preferred technical solution of this utility model; one end of the oil pipe is connected to the fluid passage inside the fixed seat, the other end of the oil pipe is connected to the oil passage on the sealing plug, and the oil passage is connected to the inside of the arc-shaped sleeve.

[0012] As a further preferred technical solution of this utility model; the fixed base is provided with a control block for controlling the opening and closing of the fluid passage between the fluid passage chamber and the oil pipe, the top of the fluid passage chamber is provided with a fluid passage communicating with the oil pipe, and the side wall of the fixed groove is provided with a drive motor for driving the control block to move and opening and closing the fluid passage.

[0013] Therefore, this utility model has the advantages of reducing the burden on the connection structure between the forearm and upper arm, reducing component wear, and improving safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Structural sectional view;

[0016] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle.

[0017] Reference numerals: 1. Forearm; 2. Arm; 21. Drive cylinder; 3. Arc-shaped sleeve; 4. Arc-shaped slide bar; 41. Sealing plug; 31. Left cavity; 32. Right cavity; 33. Oil pipe; 11. Fixing groove; 12. Fixing seat; 121. Fluid passage chamber; 34. Through hole; 35. Sealing cover; 411. Oil passage; 13. Control block; 122. Fluid passage; 14. Drive motor. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] like Figure 1-2 As shown, a stationary boom type for aerial work platforms includes a forearm 1, which is pulsatically connected to the work platform, and a boom 2, which is rotatably connected to the forearm 1. The boom 2 is equipped with a drive cylinder 21 for driving the forearm 1 to rotate longitudinally. The forearm 1 and boom 2 are rotatably connected. After the boom 2 raises the work platform, it needs to be stabilized. To maintain the stability of the work platform, the forearm 1 is driven by the drive cylinder 21 to rotate longitudinally, adjusting the work platform to a stable state and stabilizing it. After the forearm 1 and boom 2 are stabilized, the work platform remains stable at high altitude. The top of the forearm 1 is equipped with an arc-shaped sleeve 3 that curves towards the boom 2. The top of the boom 2 is equipped with a section that extends into the arc-shaped sleeve 3 and can move along an arc-shaped track within the arc-shaped sleeve 3. The arc-shaped sliding rod 4 slides along the arc-shaped sleeve 3. The centers of the arc-shaped sleeve 3 and the arc-shaped sliding rod 4 are both aligned with the rotation center of the forearm 1. When the forearm 1 flips relative to the upper arm 2, the arc-shaped sliding rod 4 slides along the arc-shaped trajectory inside the arc-shaped sleeve 3 as the forearm 1 flips. This increases the support connection between the forearm 1 and the upper arm 2 when the forearm 1 flips, reduces the load on the forearm 1 and the rotation axis between the forearm 1 and the upper arm 2, enhances the strength of the connection structure, reduces component wear, and improves safety. Furthermore, if the connection between the forearm 1 and the upper arm 2 breaks in extreme cases, the arc-shaped sliding rod 4 and the arc-shaped sleeve 3 can be used to increase the connection and prevent the forearm 1 from falling directly, thus extending the reaction time.

[0020] like Figure 1-2As shown, the outer diameter of the arc-shaped slide rod 4 is smaller than the inner diameter of the arc-shaped sleeve 3. A sealing plug 41 is provided at one end of the arc-shaped slide rod 4 located inside the arc-shaped sleeve 3. The outer wall of the sealing plug 41 abuts against and slides against the inner wall of the arc-shaped sleeve 3. The sealing plug 41 is located at the end of the arc-shaped slide rod 4 and is integrally formed with it. When the sealing plug 41 abuts against and slides against the inner wall of the arc-shaped sleeve 3, a gap is formed between the arc-shaped slide rod 4 and the inner wall of the arc-shaped sleeve 3 because the outer diameter of the arc-shaped slide rod 4 is smaller than the inner diameter of the arc-shaped sleeve 3. This gap strengthens the guiding and limiting of the arc-shaped slide rod 4, preventing positional displacement and breakage. The interior of the arc-shaped sleeve 3 is divided into a left cavity 31 and a right cavity 32 by the sealing plug 41. Both the left cavity 31 and the right cavity 32 are filled with hydraulic oil. The left cavity 31 and the right cavity 32 are connected by an external oil pipe 33. The filling of hydraulic oil increases the sealing between the arc-shaped sleeve 3 and the arc-shaped slide rod 4, and also increases lubrication, making the arc-shaped slide rod 4 slide more smoothly in the arc-shaped sleeve 3. The oil pipe 33 facilitates the connection between the left cavity 31 and the right cavity 32 of the arc-shaped sleeve 3, so that the sealing plug 41 of the arc-shaped slide rod 4 can maintain the liquid pressure balance when it moves, ensuring that the arc-shaped slide rod 4 can move normally. At the same time, the sealing plug 41 increases the hydraulic pressure on the arc-shaped slide rod 4 in the arc-shaped sleeve 3, increases the buffer performance and support strength, improves the connection strength of the rotation center at the connection between the forearm 1 and the upper arm 2, reduces the burden at the connection between the forearm 1 and the upper arm 2, and ensures the normal sliding of the arc-shaped slide rod 4.

[0021] like Figure 2-3As shown, the forearm 1 has a fixing groove 11 at the top and a fixing seat 12 at the bottom of the fixing groove 11. The end of the arc-shaped sleeve 3 is connected and fixed to the fixing seat 12. The bottom of the fixing seat 12 is connected and fixed to the bottom of the fixing groove 11 by multiple bolts. The connection between the end of the arc-shaped sleeve 3 and the fixing seat 12 can be fixed by welding or bolting. The fixing seat 12 has a liquid passage chamber 121 inside. One end of the arc-shaped sleeve 3 has a through hole 34 communicating with the liquid passage chamber 121. The arc-shaped sleeve 3 is connected to the liquid passage chamber 121 through the through hole 34, and the arc-shaped sleeve 3 and the fixing seat 12 are sealed together. The other end of the sleeve 3 is provided with a sealing cap 35 that slides with the arc-shaped slide rod 4. The sealing cap 35 is fixed to the other end of the arc-shaped sleeve 3. The arc-shaped slide rod 4 passes through the sealing cap 35. The side wall of the arc-shaped slide rod 4 is sealed with the sealing cap 35 and can slide relative to the sealing cap 35. One end of the oil pipe 33 is connected to the fluid passage 121 inside the fixed seat 12, and the other end of the oil pipe 33 is connected to the oil passage 411 on the sealing plug 41. The oil passage 411 is connected to the inside of the arc-shaped sleeve 3. The fixed seat 12 is provided with a control block 13 for controlling the opening and closing of the fluid passage 121 and the oil pipe 33. The top of the fluid passage 121 is provided with a control block 13 for controlling the opening and closing of the fluid passage 121 and the oil pipe 33. A fluid passage 122 is connected to the oil pipe 33. A drive motor 14 is provided on the side wall of the fixed groove 11 to drive the control block 13 to move and open / close the fluid passage 122. The control block 13 controls the opening and closing of the fluid passage 122, thereby controlling the connection between the fluid passage chamber 121 and the oil pipe 33, and subsequently controlling the connection between the left chamber 31 and the right chamber 32. This allows the control block 13 to be driven by the drive motor 14 to open the fluid passage 122 when the boom 1 is adjusting the stability of the work platform, thus connecting the fluid passage chamber 121 to the oil pipe 33. This connects the left cavity 31 and the right cavity 32, allowing the arc-shaped slide bar 4 to slide as the forearm 1 rotates. After the forearm 1 has stabilized the work platform, the control block 13 can be driven by the drive motor 14 to close the fluid passage 122, thereby disconnecting the left cavity 31 and the right cavity 32, preventing the oil from flowing. Consequently, the arc-shaped slide bar 4 cannot slide within the arc-shaped sleeve 3 and remains stationary. This strengthens the support at the connection point and rotation center of the forearm 1 and the boom 2, making the forearm 1 maintain a more stable work platform. It also reduces the swaying caused by height and improves the stability of the work platform.

[0022] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A stationary boom for an aerial work platform, comprising a forearm (1) driven by the work platform and a boom (2) rotatably connected to the forearm (1), wherein the boom (2) is provided with a drive cylinder (21) for driving the forearm (1) to rotate longitudinally, characterized in that: The forearm (1) is provided with an arc-shaped sleeve (3) that bends toward the upper arm (2) at the top. The upper arm (2) is provided with an arc-shaped slide rod (4) that extends into the arc-shaped sleeve (3) and can slide along an arc-shaped trajectory inside the arc-shaped sleeve (3). The arc-shaped slide rod (4) is slidably fitted with the arc-shaped sleeve (3). The centers of the arc-shaped sleeve (3) and the arc-shaped slide rod (4) are both consistent with the rotation center of the forearm (1).

2. The static holding boom of an aerial work platform according to claim 1, characterized in that: The outer diameter of the arc-shaped slide rod (4) is smaller than the inner diameter of the arc-shaped sleeve (3). A sealing plug (41) is provided at one end of the arc-shaped slide rod (4) located inside the arc-shaped sleeve (3). The outer wall of the sealing plug (41) abuts against and slides against the inner wall of the arc-shaped sleeve (3).

3. The static holding boom of an aerial work platform according to claim 2, characterized in that: The arc-shaped sleeve (3) is divided into a left cavity (31) and a right cavity (32) by a sealing plug (41). The left cavity (31) and the right cavity (32) are filled with hydraulic oil and are connected by an external oil pipe (33).

4. The static holding boom of an aerial work platform according to claim 3, characterized in that: The forearm (1) has a fixing groove (11) at the top and a fixing seat (12) at the bottom of the fixing groove (11). The end of the arc-shaped sleeve (3) is connected and fixed to the fixing seat (12).

5. A static holding boom for an aerial work platform according to claim 4, characterized in that: The fixed base (12) is provided with a liquid passage chamber (121) inside. One end of the arc-shaped sleeve (3) is provided with a through hole (34) communicating with the liquid passage chamber (121), and the other end of the arc-shaped sleeve (3) is provided with a sealing cap (35) that slides with the arc-shaped slide rod (4).

6. A static holding boom for an aerial work platform according to claim 5, characterized in that: One end of the oil pipe (33) is connected to the fluid passage (121) inside the fixed seat (12), and the other end of the oil pipe (33) is connected to the oil passage (411) on the sealing plug (41). The oil passage is connected to the inside of the arc-shaped sleeve (3).

7. A static holding boom for an aerial work platform according to claim 4, characterized in that: The fixed base (12) is provided with a control block (13) for controlling the opening and closing of the fluid passage (121) and the oil pipe (33). The top of the fluid passage (121) is provided with a fluid passage (122) communicating with the oil pipe (33). The side wall of the fixed groove (11) is provided with a drive motor (14) for driving the control block (13) to move and open and close the fluid passage (122).

Images