A method for transferring a pull plate arm downwards

Abstract

This invention discloses a method for lowering a jib arm, which adopts a novel jib arm lowering transfer structure, achieving the laying of jib arms without the need for additional power; the boom is foldable for easy transportation; the main boom height can be adjusted, and the auxiliary boom angle can be adjusted according to requirements to match the laying of jib arms with different boom section cross-sections; it can move freely, occupies a small area, and can adapt to complex working conditions.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery, and more particularly to a method for transferring a pull plate arm downwards. Background Technology

[0002] Tracked cranes, as large construction machinery, are used in various fields such as foundation construction and wind power. With technological advancements, the lifting capacity of large-tonnage tracked cranes is increasing, and the boom cross-section is also becoming larger. The boom luffing plates need to be laid on the boom, and an auxiliary tracked crane is used for lifting and laying. However, in situations where construction site space is limited and it is not suitable for multiple tracked cranes to work simultaneously, manual handling is required, which leads to safety issues, reduced assembly efficiency, and increased costs.

[0003] Prior art 1 discloses a small mobile electric motor lifting device (CN211945995U), which includes: a base, a boom, a boom frame, a hook, a winch wire, a control motor, and a luffing mechanism to solve the problem of low efficiency in cargo handling.

[0004] However, using this electric motor lifting device requires motor control, increasing costs. Furthermore, the boom cannot be folded, making transportation difficult. Difficulty in boom rotation can lead to chassis instability, and in the event of tilting, there is a risk of tipping over. The jib cannot accommodate lifting at different angles, limiting its operational range.

[0005] Prior art 2 also discloses a lifting device, fire-fighting device and its mechanical equipment (CN209906224U), including a crossbeam, a column, a traveling mechanism and a mobile lifting mechanism. This invention has a large operating range, is flexible and convenient to use, can lift large goods, and has fire-fighting functions.

[0006] However, the height of the balance beam and column cannot be adjusted using this device, and it cannot be adapted to the laying of tie plates with different boom cross sections.

[0007] Existing technology 3 describes a power-sharing luffing crane boom (CN203938395U) that incorporates a luffing device, including a gear switch and an adjusting boom. This solves the problems of skewed lifting and hoisting in actual operation, ensuring normal lifting results, safety, and flexibility. It eliminates the need for additional power, utilizing the crane's own drive unit to achieve both lifting and luffing functions, thus realizing the effect of "one power source, two functions."

[0008] However, this device cannot adjust the column height to achieve vertical adjustment. It lacks a moving mechanism, making it difficult to move.

[0009] Existing technology 4 discloses a double-swing arm lifting device (CN107416711B), including a chassis, a lifting mechanism, a double-swing arm slewing mechanism, and a swing arm luffing mechanism. The overall structure is simple and highly mobile. In situations such as short-distance handling of small and medium-sized heavy objects at construction sites, factory warehouses, and railway and highway maintenance, the double-swing arm can form a continuous operation, achieving rapid and orderly handling of heavy objects, greatly improving work efficiency. The motors in this lifting device are directly controlled by a program module, enabling remote control and ensuring efficient and precise completion of the lifting device's overall functions, including unloaded travel, loaded slewing, and hoisting.

[0010] However, using this device requires controlling the motor, which increases costs. Furthermore, the boom cannot be folded, making transportation difficult, and the chassis of the mobile device is too low to adapt to rough terrain.

[0011] Therefore, it is necessary to develop a new method for transferring the pull plate arm downwards to overcome the shortcomings of existing technologies. Summary of the Invention

[0012] Purpose of the invention: To address the shortcomings and defects of existing technologies, this invention provides a method for laying pulleys under a boom, which achieves the laying of pulleys without the need for additional power; the boom is foldable for easy transportation; the height of the main boom can be adjusted, and the angle of the auxiliary boom can be adjusted according to requirements to match the laying of pulleys with different boom section cross-sections; it can move freely, occupies a small area, and can adapt to complex working conditions.

[0013] Technical Solution: The present invention provides a method for lowering a pull-plate arm, characterized by: employing a novel pull-plate arm lowering structure; moving the trolley to a set position; opening the support frame; hinged lower plate to the lower plane of the trolley as an anti-tipping support plate to fix the position of the trolley; vertically fixing the main boom to the trolley; adjusting the height of the main boom via the inner and outer tubes; adjusting the angle of the auxiliary boom via the upper hinge of the main boom and the lower hinge of the auxiliary boom; after fixing the main boom and auxiliary boom, passing the wire rope on the winch through guide pulley one, guide pulley two of the main boom, and the lifting pulley at the end of the auxiliary boom, and connecting it to the pull-plate fixing frame; and lowering the pull-plate from the arm... When transferring to the boom, the wire rope is released by the winch, and the pull plate fixing frame is lowered vertically by adjusting the three guide wheels. When the pull plate fixing frame contacts the pull plate, the pull plate grab is released until the pull plate is fully inserted into the pull plate grab, and the self-locking structure on the pull plate grab locks the pull plate. The wire rope is then retrieved by the winch, and the pull plate is lifted from the boom by adjusting the three guide wheels. After being raised to the set height, the winch is locked, and the pull plate is transferred and transported to the set position by the moving trolley. The upper plate of the support frame is hinged to the upper plane of the moving trolley as the boom support plate. After reaching the set position, the locking device of the winch is released, the wire rope is released, and the pull plate is lowered to the top of the frame on the ground.

[0014] The lower transfer structure of the pull plate arm includes a mobile trolley. The main boom fixed support on the mobile trolley has several hinge holes. The winch bracket on the mobile trolley is connected to the winch. The guide pulley bracket one on the mobile trolley is connected to the guide pulley one. A support frame is provided on the side of the mobile trolley. The main boom fixed support is connected to the main boom and the auxiliary boom in sequence. The wire rope on the winch passes through the guide pulley one, the guide pulley two of the main boom, and the lifting pulley at the end of the auxiliary boom before connecting to the pull plate fixed frame. The upper hinge lug of the main boom for connecting with the auxiliary boom has several small holes. The crossbeam of the pull plate fixed frame has several adjustment holes. The crossbeam is connected to the guide rails on both sides through the adjustment holes. Pull plate grippers are provided at the ends of the guide rails on both sides.

[0015] The mobile trolley is equipped with four rollers, each with a diameter of 0.6m, and a guide bracket.

[0016] The winch is a manual winch and is equipped with a locking device.

[0017] The main boom includes an inner tube and an outer tube, with several small holes for adjusting the height equidistantly opened on the inner and outer tubes; the lower hinge lug of the main boom has two pin holes along the boom direction, which correspond to the hinge holes on the main boom fixed support.

[0018] The upper hinge of the main arm has several small holes around the central hole in the directions of 0°, 30°, 60°, -30°, -60°, and -90°, and the upper hinge extends outward to one side; the guide pulley bracket two of the upper hinge is connected to the guide pulley two.

[0019] The lower winch of the auxiliary boom has two pin holes along the boom direction, which correspond to the small holes on the upper winch of the main boom; the lifting pulley bracket of the upper winch of the auxiliary boom is connected to the lifting pulley.

[0020] The support frame includes a bracket, an upper plate above the bracket, and a lower plate with a curved structure below the bracket. A pin hole is provided between the upper plate and the lower plate. During transportation, the upper plate is hinged to the upper plane of the mobile trolley as a boom support plate. During operation, the lower plate is hinged to the lower plane of the mobile trolley as an anti-rollover support plate.

[0021] The crossbeam of the pull plate fixing frame is provided with a connecting ear in the middle, which is connected to the wire rope. The guide rail is divided into guide rail one and guide rail two. Both guide rail one and guide rail two are provided with several mounting holes. Guide rail one and guide rail two are connected to the crossbeam by bolts passing through the corresponding mounting holes and adjustment holes.

[0022] The guide rail one and guide rail two are provided with pull plate grippers at their ends. The pull plate grippers include a gripper frame and a self-locking structure. The span of the gripper frame is greater than twice the width of the outer pull plate.

[0023] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention provides a method for transferring the jib arm downwards without the need for additional power to achieve the laying of the jib; the boom can be folded for easy transportation; the height of the main boom can be adjusted, and the angle of the auxiliary boom can be adjusted according to requirements to match the laying of jibs with different boom section cross-sections; it can move freely, occupies a small area, and can adapt to complex working conditions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the pull plate arm lower transfer structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the main arm of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the pull plate fixing frame of the present invention;

[0027] Figure 4 This is a schematic diagram of the support frame of the present invention;

[0028] Figure 5 The support frame of the present invention is in use. Figure 1 ;

[0029] Figure 6 The support frame of the present invention is in use. Figure 2 ;

[0030] Figure 7 This is a diagram showing the usage state of the present invention;

[0031] Figure 8 This is a diagram showing the folded state of the present invention;

[0032] In the diagram, 1 is the moving trolley; 2 is the winch; 3 is the first guide pulley; 4 is the main boom; 41 is the inner tube; 42 is the outer tube; 43 is the lower winch lug; 44 is the upper winch lug; 45 is the second guide pulley bracket; 46 is the second guide pulley; 5 is the auxiliary boom; 6 is the support frame; 61 is the bracket; 62 is the upper plate; 63 is the pin hole; 64 is the lower plate; 7 is the pull plate fixing frame; 71 is the crossbeam; 72 is the connecting lug; 73 is the guide rail; 74 is the pull plate gripper; and 8 is the wire rope. Detailed Implementation

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] The method for lowering the boom of the present invention employs a novel boom lowering structure. The mobile trolley 1 is moved to a set position, the support frame 6 is opened, and the lower hinge plate 64 is hinged to the lower plane of the mobile trolley 1 as an anti-tipping support plate to fix the position of the mobile trolley 1. The main boom 4 is vertically fixed on the mobile trolley 1, and the height of the main boom 4 is adjusted according to the height of the boom section laid on the boom via the inner tube 41 and the outer tube 42. The angle of the auxiliary boom 5 is adjusted according to the position of the boom on the boom via the upper hinge lug 44 of the main boom 4 and the lower hinge lug of the auxiliary boom 5. After fixing the main boom 4 and the auxiliary boom 5, the wire rope 8 is further adjusted. The wire rope 8 on the winch 2 is passed through the guide pulley 1 3, the guide pulley 2 46 of the main boom 4, and the lifting pulley at the end of the auxiliary boom 5, and then... The pull plate fixing frame 7 is connected; when transferring the pull plate from the upper arm to the lower arm, the wire rope 8 is released by the winch 2, and the pull plate fixing frame 7 is lowered vertically by adjusting the three guide wheels. When the pull plate fixing frame 7 contacts the pull plate, the pull plate gripper 74 is released until the pull plate is fully inserted into the pull plate gripper 74, and the self-locking structure on the pull plate gripper 74 locks the pull plate; the wire rope 8 is retrieved by the winch 2, and the pull plate is lifted from the boom by adjusting the three guide wheels. After being lifted to the set height, the winch 2 is locked, and the pull plate is transferred and transported to the set position by the moving trolley 1. The upper plate 62 of the support frame 6 is hinged to the upper plane of the moving trolley 1 as the boom support plate; after reaching the set position, the locking device of the winch 2 is released, the wire rope 8 is released, and the pull plate is lowered to the top of the frame on the ground. When it is necessary to adjust the pull plate back onto the boom, the above process is reversed. A modular design is adopted, and the components are connected by pins.

[0035] like Figure 1 The mobile trolley 1 is equipped with a main boom fixing support, which has multiple hinge holes to ensure that the main boom 4 can be placed horizontally or vertically, and to allow for boom folding for easy transportation. The mobile trolley 1 also has four 0.6m diameter rollers to adapt to complex terrain, such as muddy ground, and to provide support and prevent the trolley from tipping over. A guide bracket is also installed on the mobile trolley 1 for easy adjustment. A winch bracket is also installed on the mobile trolley 1 for easy winding of the wire rope. A winch 2 is installed on the winch bracket, which has a winch locking device and an auxiliary manual winding device, allowing the wire rope 8 to be manually wound onto the winch 2. The winch 2 is manually wound, eliminating the need for other power sources and effectively solving the problem of power shortages at field construction sites. A guide pulley bracket is also installed on the mobile trolley 1, with guide pulleys 3 on it, used to adjust the direction of the wire rope 8 winding from the winch 2.

[0036] like Figure 2The main boom 4 has an inner tube 41, an outer tube 42, a lower hinge 43, an upper hinge 44, a second guide pulley bracket 45, and a second guide pulley 46. Multiple small holes are equally spaced on the inner tube 41 and outer tube 42 to allow for height adjustment of the main boom 4, accommodating the installation of upper tension plates with different boom cross-sections. The lower hinge 43 has two pin holes along the boom direction, used in conjunction with the hinge holes of the upper hinge on the main boom fixing support of the moving trolley 1. The upper hinge 44 has multiple small holes around the central hole at 0°, 30°, 60°, -30°, -60°, and -90°, extending outwards to one side. The second guide pulley bracket 45 is installed on the upper hinge 44, with crossbars located on both sides of the upper hinge 44. The second guide pulley 46 is mounted on the second guide pulley bracket 45 via pulley shafts.

[0037] The main boom 4 has an upper hinge lug 44 on which the auxiliary boom 5 is mounted. The lower hinge lug of the auxiliary boom 5 has two small holes along the boom direction, which work in conjunction with the hinge holes of the main boom upper hinge lug 44 to ensure the adjustment of the auxiliary boom 5's angle. The extended main boom upper hinge lug 44 and the auxiliary boom lower hinge lug cooperate to achieve the folding of the auxiliary boom 5. A lifting pulley is mounted on the upper hinge lug of the auxiliary boom 5 to achieve the directional adjustment of the lifting wire rope 8.

[0038] like Figure 3 The pull plate fixing frame 7 includes a crossbeam 71, connecting ears 75, guide rails 73, and pull plate grippers 74. The connecting ears 75 are welded to the center of the crossbeam 71 and can mate with the heavy-duty collar of the wire rope 8. Multiple adjustment holes are evenly spaced on both sides of the crossbeam 71, which are fixed to the mounting holes on guide rails one and two on both sides by bolts. Adjusting the length of the entire crossbeam 71 allows for the lifting of pull plates of different lengths. A pull plate gripper 74 is installed on one side of guide rails one and two. The pull plate gripper 74 consists of a gripper frame and a self-locking structure; the span of the gripper frame must be greater than twice the width of the pull plate. The self-locking structure includes a baffle and a spring. When the pull plate is in contact, the baffle is lifted; when the pull plate is fully inserted into the gripper, the baffle closes again under the action of the spring.

[0039] like Figure 4 , 5 6. The support frame 6 includes a bracket 61, an upper plate 62, a locking pin hole 63, and a lower plate 64. The upper plate 62 is welded to the upper surface of the bracket 61, the lower plate 64 is welded to the lower surface of the bracket 61, and the locking pin hole 63 is welded between the upper and lower surfaces. During transportation, the upper plate 62 is hinged to the upper surface of the mobile trolley 1, acting as a boom support plate. In the working state, the lower plate 64 is hinged to the lower surface of the mobile trolley 1, serving as a support plate to prevent tipping.

[0040] This invention employs a novel pull-plate arm lowering transfer structure, aiming to achieve safe and reliable lowering of the pull-plate arm or laying the pull plate flat at the target location. The device has a simple structure and is easy to operate. The winch 2 retracts and extends the wire rope 8, raising the pull plate to a certain height, and then adjusting the position of the pull plate. Multiple small holes are evenly spaced on the inner tube 41 and outer tube 42 of the main boom, allowing for height adjustment of the main boom 4 to accommodate the laying of pull plates on different boom cross-sections. The winch 2 is equipped with a winch locking device and an auxiliary manual winding device, allowing the wire rope 8 to be manually wound onto the winch 2. The winch 2 is manually operated, eliminating the need for other power sources and effectively solving the problem of power shortages at field construction sites.

[0041] The mobile trolley 1 is equipped with a main boom fixing support, which has multiple hinge holes to ensure that the main boom 4 can be placed horizontally or vertically, and to facilitate boom folding for easy transportation. The mobile trolley 1 has four wheels with a diameter of 0.6m, allowing it to move freely to adapt to complex terrain, such as muddy ground, while also providing support to prevent the trolley from tipping over. The upper hinge lugs of the main boom 4 have multiple small holes around the central hole in the directions of 0°, 30°, 60°, -30°, -60°, and -90°. By cooperating with the lower hinge lugs of the auxiliary boom, the angle of the auxiliary boom 5 can be adjusted, and the auxiliary boom 5 can be folded.

[0042] Multiple adjustment holes are evenly spaced on both sides of the crossbeam 71 of the pull plate fixing frame 7, which are fixed to the mounting holes on the guide rails 1 and 2 on both sides by bolts. The length of the entire crossbeam 71 can be adjusted to accommodate the hoisting of pull plates of different lengths. A pull plate gripper 74 is installed on one side of the guide rails 1 and 2. The pull plate gripper 74 has a gripper frame and a self-locking structure to realize the grabbing and transfer of pull plates, avoiding personnel from operating with their arms.

Claims

1. A method for transferring a pull plate arm downwards, characterized in that: Using a pull-plate arm transfer structure, the mobile trolley (1) is moved to a set position, the support frame (6) is opened, and the lower plate (64) is hinged to the lower plane of the mobile trolley (1) as an anti-rollover support plate to fix the position of the mobile trolley (1); the main boom (4) is vertically fixed on the mobile trolley (1), and the height of the main boom (4) is adjusted by the inner tube (41) and the outer tube (42); the angle of the auxiliary boom (5) is adjusted by the upper hinge (44) of the main boom (4) and the lower hinge (5) of the auxiliary boom (5); after fixing the main boom (4) and the auxiliary boom (5), the wire rope (8) on the winch (2) is passed through the first guide pulley (3), the second guide pulley (46) of the main boom (4), and the lifting pulley at the end of the auxiliary boom (5) and then connected to the pull plate fixing frame (7); the pull plate is transferred from the arm to the pull plate. When the boom is in motion, the wire rope (8) is released by the winch (2), and the pull plate fixing frame (7) is lowered vertically by adjusting the three guide wheels. When the pull plate fixing frame (7) contacts the pull plate, the pull plate grabber (74) is released until the pull plate is completely inside the pull plate grabber (74). The self-locking structure on the pull plate grabber (74) locks the pull plate. The wire rope (8) is retrieved by the winch (2), and the pull plate is lifted from the boom by adjusting the three guide wheels. After being lifted to the set height, the winch (2) is locked. The pull plate is transferred and transported to the set position by the moving trolley (1). The upper plate (62) of the support frame (6) is hinged to the upper plane of the moving trolley (1) as the boom support plate. After reaching the set position, the locking device of the winch (2) is released, the wire rope (8) is released, and the pull plate is lowered to the top of the frame on the ground. The aforementioned lower transfer structure of the pull-plate arm includes a mobile trolley (1), the main boom fixed support on the mobile trolley (1) is provided with several hinge holes, the winch bracket on the mobile trolley (1) is connected to the winch (2), the guide pulley bracket on the mobile trolley (1) is connected to the guide pulley (3), and a support frame (6) is provided on the side of the mobile trolley (1); the main boom fixed support is connected to the main boom (4) and the auxiliary boom (5) in sequence, and the wire rope (8) on the winch (2) passes through the guide. The pulley 1 (3), the guide pulley 2 (46) of the main boom (4), and the lifting pulley at the end of the auxiliary boom (5) are connected to the pull plate fixing frame (7); the upper hinge (44) of the main boom (4) for connecting with the auxiliary boom (5) has several small holes; the crossbeam (71) of the pull plate fixing frame (7) has several adjustment holes, and the crossbeam (71) is connected to the guide rails (73) on both sides through the adjustment holes. The ends of the guide rails (73) on both sides are provided with pull plate grippers (74). The support frame (6) includes a bracket (61), an upper plate (62) above the bracket (61), and a lower plate (64) with a curved structure below the bracket (61). A pin hole (63) is provided between the upper plate (62) and the lower plate (64). During transportation, the upper plate (62) is hinged to the upper plane of the mobile trolley (1) as a boom support plate. During operation, the lower plate (64) is hinged to the lower plane of the mobile trolley (1) as an anti-rollover support plate. The pull plate fixing frame (7) The crossbeam (71) is provided with a connecting ear (72) in the middle, which is connected to the wire rope (8). The guide rail (73) is divided into guide rail one and guide rail two. Both guide rail one and guide rail two are provided with several mounting holes. Guide rail one and guide rail two are connected to the crossbeam (71) by bolts passing through the corresponding mounting holes and adjustment holes. The ends of the guide rail one and guide rail two are provided with pull plate grippers (74). The pull plate grippers (74) include a gripper frame and a self-locking structure. The span of the gripper frame is greater than twice the width of the outer pull plate.

2. The method for transferring the pull plate arm downwards according to claim 1, characterized in that: The mobile trolley (1) is equipped with 4 rollers with a diameter of 0.6m and a guide bracket.

3. The method for transferring the pull plate arm downwards according to claim 1, characterized in that: The winch (2) is a manual winch and is equipped with a locking device.

4. The method for transferring the pull plate arm downwards according to claim 1, characterized in that: The main boom (4) includes an inner tube (41) and an outer tube (42). The inner tube (41) and the outer tube (42) are provided with several small holes for adjusting the height at equal intervals. The lower hinge (43) of the main boom (4) is provided with two pin holes along the boom direction. The pin holes are used in correspondence with the hinge holes on the main boom fixed support.

5. The method for transferring the pull plate arm downwards according to claim 4, characterized in that: The upper hinge (44) of the main arm (4) has several small holes opened around the central hole in the directions of 0°, 30°, 60°, -30°, -60° and -90° respectively, and the upper hinge (44) extends outward to one side; the guide pulley bracket (45) of the upper hinge (44) is connected to the guide pulley (46).

6. The method for transferring the pull plate arm downwards according to claim 5, characterized in that: The lower hinge of the auxiliary boom (5) has two pin holes along the boom direction, which correspond to the small holes of the upper hinge (44) of the main boom (4); the lifting pulley bracket of the upper hinge of the auxiliary boom (5) is connected to the lifting pulley.

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