Efficient jacking mechanism of tower crane

Abstract

The utility model discloses an efficient jacking mechanism of a tower crane, and particularly relates to the technical field of tower cranes, the efficient jacking mechanism comprises a standard knot, a plurality of opening blocks are fixedly connected with the left side and the right side of the front end of the outer surface of the standard knot at intervals, and the outer surface of the standard knot is connected with a square sleeve frame in a sliding mode. A hydraulic cylinder is fixedly connected to the upper end of the middle of the square sleeve frame, a positioning assembly is fixedly connected to the output end of the hydraulic cylinder, and a connecting mechanism is fixedly connected to the rear end of the positioning assembly. According to the efficient jacking mechanism of the tower crane, the connecting mechanism is used for fixing in the jacking process of the hydraulic cylinder, so that the output end of the hydraulic cylinder cannot fall off in the jacking process, the jacking force of the hydraulic cylinder can be uniformly and stably transmitted to the square sleeve frame, and the jacking efficiency of the tower crane is improved. Therefore, the square sleeve frame is kept stable in the ascending or descending process, the shaking or inclining phenomenon is avoided, and the stability and accuracy of jacking operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of tower crane technology, and in particular to a high-efficiency lifting mechanism for tower cranes. Background Technology

[0002] Tower cranes, as large-scale mechanical equipment widely used in the construction industry, undertake the crucial task of material handling in the construction of various high-rise buildings and large-scale infrastructure projects. With the continuous increase in building height, the frequency of tower crane jacking operations has increased significantly, making the performance of the jacking mechanism, especially its safety and efficiency, a vital factor affecting project progress and construction safety.

[0003] In existing tower crane lifting systems, hydraulic cylinders are the core power components for achieving the lifting action. The output end of the hydraulic cylinder is connected to the lifting frame and other structures via connecting components, bearing enormous axial tensile force and dynamic loads during the lifting process. However, in actual operation, the problem of the hydraulic cylinder output end detaching occurs frequently, posing a serious safety hazard. Once the hydraulic cylinder output end detaches during lifting, the lifting frame will suddenly fall due to loss of support, potentially causing the tower crane to overturn, resulting in serious casualties and property damage. Moreover, after an accident, not only is it necessary to repair or replace the damaged equipment, but also to conduct a comprehensive inspection and debugging of the entire lifting system. This will lead to a prolonged construction halt, severely impacting the project schedule and increasing project costs.

[0004] Therefore, a high-efficiency lifting mechanism for tower cranes is needed. Utility Model Content

[0005] The main objective of this invention is to provide a high-efficiency lifting mechanism for tower cranes, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A high-efficiency jacking mechanism for a tower crane includes a standard section. Several open blocks are fixedly connected at intervals on the left and right sides of the front end of the outer surface of the standard section. A square sleeve is slidably connected to the outer surface of the standard section. A hydraulic cylinder is fixedly connected to the upper middle part of the square sleeve. A positioning component is fixedly connected to the output end of the hydraulic cylinder. A connecting mechanism is fixedly connected to the rear end of the positioning component.

[0008] Preferably, the positioning component includes a trapezoidal block, which is fixedly connected to the output end of the hydraulic cylinder, and positioning pins are fixedly connected to the upper parts of the left and right ends of the trapezoidal block.

[0009] Preferably, the connecting mechanism includes a fixed box, which is fixedly connected to the rear end of the trapezoidal block. A locking mechanism is fixedly connected to the upper wall of the inner cavity of the fixed box. Support plates are fixedly connected to the left and right sides of the middle part of the inner cavity of the fixed box. Limit pins are slidably connected to the left and right walls of the inner cavity of the fixed box. Fixed cylinders are fixedly connected to the ends of the two limit pins that are close to each other. Springs are fixedly connected to the inner cavities of the two fixed cylinders. The ends of the two springs that are close to each other are respectively fixedly connected to the ends of the two support plates that are far apart from each other. A guide wheel is fixedly connected to the right side of the middle part of the inner cavity of the fixed box. Ropes are fixedly connected to the middle of the ends of the two fixed cylinders that are far apart from each other. Handles are provided at the middle of the upper end and the right side of the middle part of the fixed box.

[0010] Preferably, the ends of the two ropes that are close to each other pass through the outer surface of the support plate on the same side and are wrapped around and connected to the outer surface of the guide wheel on the same side. The ends of the two ropes that are away from the limit pin on the same side pass through the lower end of the locking mechanism and the upper wall of the fixing box, extend to the outside, and are fixedly connected to the lower end of the handle on the right side.

[0011] Preferably, the rope on the left is longer than the rope on the right.

[0012] Preferably, the locking mechanism includes a sliding frame and two locking bars. The sliding frame is fixedly connected to the upper wall of the inner cavity of the fixed box. The two locking bars are respectively fixedly connected to the upper side of the outer arc surface of the two fixed cylinders. The sliding frame is slidably connected to a sliding plate. Several springs are fixedly connected at intervals on the front and rear sides of the upper end of the sliding plate. Fixed blocks are fixedly connected to the left and right sides of the lower end of the sliding plate. A lever is rotatably connected to the inner surface of the two fixed blocks. An arc-shaped spring is fixedly connected to the end of the two levers that are close to each other. An L-shaped block is fixedly connected to the end of the two levers that are far apart from each other.

[0013] Preferably, the upper ends of several springs are fixedly connected to the upper wall of the fixing box, and the upper ends of the vertical portions of the two L-shaped blocks are fixedly connected to the lower end of the slide plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. During use, this utility model uses a connecting mechanism to fix the hydraulic cylinder during the lifting process, ensuring that the output end of the hydraulic cylinder will not fall off during the lifting process. This helps to evenly and stably transmit the lifting force of the hydraulic cylinder to the square sleeve, thereby keeping the square sleeve stable during the rising or falling process, avoiding swaying or tilting, and improving the stability and accuracy of the lifting operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the square sleeve of this utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the positioning component of this utility model;

[0020] Figure 5 This is a cross-sectional structural diagram of the connection mechanism of this utility model;

[0021] Figure 6 This is a cross-sectional structural diagram of the connection mechanism of this utility model;

[0022] Figure 7 This is a cross-sectional structural diagram of the locking mechanism of this utility model.

[0023] In the diagram: 1. Standard section; 2. Opening block; 3. Square sleeve; 4. Hydraulic cylinder; 5. Positioning assembly; 51. Trapezoidal block; 52. Positioning pin; 6. Connecting mechanism; 61. Fixing box; 62. Locking mechanism; 621. Sliding frame; 622. Slide plate; 623. Fixing block; 624. Arc spring three; 625. Pulling block; 626. L-shaped block; 627. Locking strip; 628. Spring two; 63. Support plate; 64. Spring one; 65. Fixing cylinder; 66. Limit pin; 67. Rope; 68. Guide wheel; 69. Handle. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] Example 1, as Figures 1 to 7 As shown, a high-efficiency lifting mechanism for a tower crane includes a standard section 1. Several open blocks 2 are fixedly connected at intervals on the left and right sides of the front end of the outer surface of the standard section 1. A square sleeve 3 is slidably connected to the outer surface of the standard section 1. A hydraulic cylinder 4 is fixedly connected to the upper middle part of the square sleeve 3. A positioning component 5 is fixedly connected to the output end of the hydraulic cylinder 4. A connecting mechanism 6 is fixedly connected to the rear end of the positioning component 5.

[0026] In the specific implementation of this utility model, firstly, a crane is used to install the entire square sleeve 3 onto the outer surface of the standard section 1. Then, construction personnel enter the square sleeve 3. When it is necessary to raise the square sleeve 3 above the surface of the standard section 1, the construction personnel activate the hydraulic cylinder 4, causing its internal structure to lower the positioning component 5 and the connecting mechanism 6 to a certain position. Then, the construction personnel manually insert the internal structure of the positioning component 5 into the opening of the opening block 2. Finally, by pulling the internal structure of the connecting mechanism 6, the internal structure of the connecting mechanism 6 is inserted into the hole on the rear side of the opening block 2, thereby achieving positioning. The internal structure of component 5 will not detach from the opening of the opening block 2. Then, the hydraulic cylinder 4 is activated, which pushes the positioning component 5 that is in contact with the opening block 2. The internal structure of the positioning component 5 is squeezed, so that the output end of the hydraulic cylinder 4 remains stationary while pushing. The upper end of the hydraulic cylinder 4 pushes the square sleeve 3 upward on the surface of the standard section 1, thereby achieving the purpose of moving the square sleeve 3 upward. When the square sleeve 3 rises to a certain distance, the construction personnel on the upper layer of the square sleeve 3 use high-strength bolts to fix the square sleeve 3 to the standard section 1 to ensure that the square sleeve 3 will not fall downward.

[0027] Then, the construction workers lift the internal structure of the connecting mechanism 6 to release it from locking the positioning component 5 and the opening block 2. Then, the internal structure of the positioning component 5 is moved outward from the opening of the opening block 2. The hydraulic cylinder 4 is activated so that the hydraulic cylinder 4 drives the positioning component 5 to move upward to the position of the next opening block 2. The above operation can be continued to lift.

[0028] Specifically, in order to enable the internal structure of the positioning component 5 to engage with the opening inside the opening block 2, refer to Figure 4 In this solution, the positioning component 5 includes a trapezoidal block 51, which is fixedly connected to the output end of the hydraulic cylinder 4. Positioning pins 52 are fixedly connected to the upper left and right ends of the trapezoidal block 51.

[0029] In the above process, the trapezoidal block 51 is pushed down by the hydraulic cylinder 4, which lengthens the output shaft of the hydraulic cylinder 4 and allows the trapezoidal block 51 to swing slightly. Then, the construction worker swings the trapezoidal block 51 to send the two positioning pins 52 into the opening of the inlet block 2, and then fixes it through the internal structure of the connecting mechanism 6.

[0030] In Example 2, to achieve the goal of fixing the trapezoidal block 51 at the opening of the opening block 2, refer to... Figure 5 and Figure 6In this solution, the connecting mechanism 6 includes a fixed box 61, which is fixedly connected to the rear end of the trapezoidal block 51. A locking mechanism 62 is fixedly connected to the upper wall of the inner cavity of the fixed box 61. Support plates 63 are fixedly connected to the left and right sides of the middle part of the inner cavity of the fixed box 61. Limit pins 66 are slidably connected to the left and right walls of the inner cavity of the fixed box 61. Fixed cylinders 65 are fixedly connected to the ends of the two limit pins 66 that are close to each other. Springs 64 are fixedly connected to the inner cavities of the two fixed cylinders 65. The ends of the two springs 64 that are close to each other are respectively fixedly connected to the ends of the two support plates 63 that are far apart from each other. A guide wheel 68 is fixedly connected to the right side of the middle part of the inner cavity of the fixed box 61. Ropes 67 are fixedly connected to the middle of the ends of the two fixed cylinders 65 that are far apart from each other. Handles 69 are provided at the middle of the upper end and the right side of the middle part of the fixed box 61.

[0031] Furthermore, the ends of the two ropes 67 that are close to each other pass through the outer surface of the support plate 63 on the same side and are wrapped around the outer surface of the guide wheel 68 on the same side. The ends of the two ropes 67 that are away from the limiting pin 66 on the same side pass through the lower end of the locking mechanism 62 and the upper wall of the fixing box 61, extend to the outside, and are fixedly connected to the lower end of the handle 69 on the right side.

[0032] Furthermore, the rope 67 on the left is longer than the rope 67 on the right.

[0033] In the above process, when the two positioning pins 52 are placed at the opening of the opening block 2, the construction personnel lift the middle handle 69 upwards, causing the middle handle 69 to drive the locking mechanism 62 to move internally. This causes the internal structure of the locking mechanism 62 to release the lock on the two fixed cylinders 65. Then, under the action of the spring 64, the two fixed cylinders 65 are pushed away from each other, causing the two fixed cylinders 65 to push the two limit pins 66 into the pin holes of the opening block 2. This achieves the purpose of fixing the trapezoidal block 51 and the opening block 2, ensuring that the two positioning pins 52 do not leave the opening of the opening block 2.

[0034] Then, when it is necessary to release the lock on trapezoidal block 51 and opening block 2, pull the handle 69 on the right side upwards, so that the handle 69 pulls the two ropes 67 at the same time. Then, through the two guide wheels 68, the two ropes 67 pull the fixed cylinders 65 closer together, so that the two fixed cylinders 65 drive the two limit pins 66 into the inner cavity of the fixed box 61. At the same time, as the two fixed cylinders 65 approach each other, the internal structure of the locking mechanism 62 prevents the two fixed cylinders 65 from springing back, ensuring that the two limit pins 66 will not re-enter the pin hole inside the opening block 2, thereby releasing the lock on trapezoidal block 51 and opening block 2.

[0035] Specifically, in order to lock the two fixed cylinders 65, refer to Figure 7In this solution, the locking mechanism 62 includes a sliding frame 621 and two locking strips 627. The sliding frame 621 is fixedly connected to the upper wall of the inner cavity of the fixed box 61. The two locking strips 627 are respectively fixedly connected to the upper side of the outer arc surface of the two fixed cylinders 65. The sliding frame 621 is slidably connected to a sliding plate 622. Several springs 628 are fixedly connected at intervals on the front and rear sides of the upper end of the sliding plate 622. Fixed blocks 623 are fixedly connected to the left and right sides of the lower end of the sliding plate 622. A lever 625 is rotatably connected to the inner surface of the two fixed blocks 623. An arc-shaped spring 624 is fixedly connected to the end of the two levers 625 that are close to each other. An L-shaped block 626 is fixedly connected to the end of the two levers 625 that are far apart from each other.

[0036] Furthermore, the upper ends of several springs 628 are fixedly connected to the upper wall of the fixing box 61, and the upper ends of the vertical parts of the two L-shaped blocks 626 are fixedly connected to the lower end of the slide plate 622.

[0037] In the above process, when the trapezoidal block 51 and the opening block 2 are unlocked, the two locking strips 627 are brought closer together, causing the two locking strips 627 to rotate the lever 625. Then, the L-shaped block 626 prevents the two levers 625 from flipping in the opposite direction, thus ensuring that the two fixed cylinders 65 do not spring back. When it is necessary to fix the trapezoidal block 51 and the opening block 2, the handle 69 in the middle is pulled upward to lift the slide plate 622, causing the slide plate 622 to lift the two fixed blocks 623. At the same time, it causes the lever 625 to leave the inside of the locking strip 627, thereby unlocking the fixed cylinders 65. Then, the spring 64 pushes the two fixed cylinders 65 away from each other, so that the two limit pins 66 enter the pin holes of the opening block 2 to achieve the purpose of fixing.

[0038] It should be noted that the specific installation method, oil circuit connection method and control method of the hydraulic cylinder 4 used in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency jacking mechanism of a tower crane comprising a standard section (1), characterized in that: Several open blocks (2) are fixedly connected at intervals on the left and right sides of the front end of the standard section (1). A square sleeve (3) is slidably connected to the outer surface of the standard section (1). A hydraulic cylinder (4) is fixedly connected to the upper middle part of the square sleeve (3). A positioning component (5) is fixedly connected to the output end of the hydraulic cylinder (4). A connecting mechanism (6) is fixedly connected to the rear end of the positioning component (5).

2. A high efficiency jacking mechanism for a tower crane as claimed in claim 1, characterised in that: The positioning component (5) includes a trapezoidal block (51), which is fixedly connected to the output end of the hydraulic cylinder (4). Positioning pins (52) are fixedly connected to the upper left and right ends of the trapezoidal block (51).

3. A high efficiency jacking mechanism for a tower crane as claimed in claim 2, characterised in that: The connecting mechanism (6) includes a fixed box (61), which is fixedly connected to the rear end of the trapezoidal block (51). A locking mechanism (62) is fixedly connected to the upper wall of the inner cavity of the fixed box (61). Support plates (63) are fixedly connected to the left and right sides of the middle part of the inner cavity of the fixed box (61). Limit pins (66) are slidably connected to the left and right walls of the inner cavity of the fixed box (61). Fixed cylinders (65) are fixedly connected to the ends of the two limit pins (66) that are close to each other. The inner cavities of the two fixed cylinders (65) are each fixedly connected to a spring (64). The ends of the two springs (64) that are close to each other are respectively fixedly connected to the ends of the two support plates (63) that are far apart from each other. A guide wheel (68) is fixedly connected to the right side of the middle of the inner cavity of the fixed box (61). A rope (67) is fixedly connected to the middle of the ends of the two fixed cylinders (65) that are far apart from each other. A handle (69) is provided at the middle of the upper end and the right side of the middle of the fixed box (61).

4. The high-efficiency lifting mechanism for a tower crane according to claim 3, characterized in that: The ends of the two ropes (67) that are close to each other pass through the outer surface of the support plate (63) on the same side and are wrapped around the outer surface of the guide wheel (68) on the same side. The ends of the two ropes (67) that are away from the limit pin (66) on the same side pass through the lower end of the locking mechanism (62) and the upper wall of the fixing box (61) to the outside and are fixedly connected to the lower end of the handle (69) on the right side.

5. The high-efficiency lifting mechanism for a tower crane according to claim 4, characterized in that: The rope (67) on the left is longer than the rope (67) on the right.

6. The high-efficiency lifting mechanism for a tower crane according to claim 3, characterized in that: The locking mechanism (62) includes a sliding frame (621) and two locking strips (627). The sliding frame (621) is fixedly connected to the upper wall of the inner cavity of the fixed box (61). The two locking strips (627) are respectively fixedly connected to the upper side of the outer arc surface of the two fixed cylinders (65). The sliding frame (621) is slidably connected to a sliding plate (622). Several springs (628) are fixedly connected at intervals on the front and rear sides of the upper end of the sliding plate (622). Fixed blocks (623) are fixedly connected to the left and right sides of the lower end of the sliding plate (622). A lever (625) is rotatably connected to the inner surface of the two fixed blocks (623). An arc-shaped spring (624) is fixedly connected to the end of the two levers (625) that are close to each other. An L-shaped block (626) is fixedly connected to the end of the two levers (625) that are far apart from each other.

7. The high-efficiency lifting mechanism for a tower crane according to claim 6, characterized in that: The upper ends of several springs (628) are fixedly connected to the upper wall of the fixed box (61), and the upper ends of the vertical parts of the two L-shaped blocks (626) are fixedly connected to the lower end of the slide plate (622).

Images