Pawl device for a tower crane load carriage

Abstract

The utility model discloses a tower crane load trolley ratchet wheel device, specifically relates to ratchet wheel technical field, including hoist frame, the upper surface fixed connection of hoist frame has the sleeve joint board, the inner wall rotationally connected with linkage shaft of sleeve joint board is equipped with linkage ratchet wheel subassembly, and the outer wall of linkage shaft is equipped with linkage ratchet wheel subassembly, and linkage ratchet wheel subassembly includes pinion, spur gear, pivot, spool, rotation ratchet wheel and a plurality of groove bodies, and pinion is fixed on the outer wall of linkage shaft, and spur gear is engaged transmission connection on the outer wall of pinion. The utility model adopts linkage ratchet wheel subassembly, and linkage shaft drives pinion to rotate, and pinion drives spur gear to engage rotation spur gear to drive pivot to rotate, and spool drives rotation ratchet wheel to rotate, and rotation ratchet wheel drives a plurality of groove bodies to rotate, and rotation ratchet wheel anticlockwise rotation will extrude sleeve joint block, and pinion and spur gear can realize deceleration high -efficient transmission, and are more time -saving and labor -saving.

Description

Technical Field

[0001] This utility model relates to the field of ratchet technology, and more specifically, to a ratchet device for a tower crane trolley. Background Technology

[0002] In tower crane operation, the trolley needs to move frequently on the boom to adjust the position of the lifted load. When the trolley stops at a certain position, it may unexpectedly slip due to wind, inertia, or other external factors, causing the lifted load to shift and potentially leading to a safety accident. The ratchet mechanism, through its internal ratchet and pawl structure, achieves a one-way locking function. When the trolley stops moving, the pawl automatically engages with the ratchet's teeth, preventing the trolley from sliding downwards and ensuring its stability when stationary.

[0003] Among the existing publicly available documents, patent publication number CN216190500U discloses a novel double-pin-shaft load-bearing trolley rope tightening device. This technology is safe and reliable during use. The arc-shaped tooth surfaces of the first and second ratchet wheels lift the second pin, and under the action of the universal joint at one end of the second pin, the second pin automatically falls into the next hole of the first and second ratchet wheels to prevent rotation. It achieves both the operational convenience of ordinary pawl-type rope tightening devices and the non-loosening advantage of single-pin-shaft rope tightening devices. However, this technology still has the following drawbacks.

[0004] When using the trolley of a tower crane, a ratchet device is required to install the rope. After installation, the ratchet is subjected to a large force, making it difficult to easily achieve one-way locking drive. One-way use is more time-consuming and labor-intensive. Utility Model Content

[0005] To overcome the aforementioned deficiencies of the prior art, this utility model provides the following technical solution: a ratchet device for a tower crane trolley, comprising a lifting frame, a connecting plate fixedly connected to the upper surface of the lifting frame, a linkage shaft rotatably connected to the inner wall of the connecting plate, and a linkage ratchet assembly provided on the outer wall of the linkage shaft; the linkage ratchet assembly includes a pinion, a large gear, a rotating shaft, a spool, a rotating ratchet, and multiple grooves; the pinion is fixed to the outer wall of the linkage shaft, the large gear is meshed and driven connected to the outer wall of the pinion, the rotating shaft is fixed to the inner wall of the large gear, and the rotating shaft is rotatably connected to the connecting plate, the spool is fixed to one end of the rotating shaft, the rotating ratchet is fixed to the outer wall of the spool, and multiple grooves are formed on the outer wall of the rotating ratchet.

[0006] Preferably, the center point of the rotating shaft and the center point of the spool are on the same horizontal line, and the vertical cross-section of the rotating shaft is circular. Multiple grooves are arranged in a circumferential distribution, and both the ratchet and the spool can be made of stainless steel.

[0007] In use, rotating the linkage shaft causes the small gear to mesh with the large gear and rotate the shaft inside the socket plate. The spool drives the ratchet to rotate, which in turn drives multiple slots to rotate. The support shaft drives the socket block to rotate, which in turn drives the ratchet to rotate counterclockwise. The ratchet can rotate counterclockwise, but when it rotates clockwise, it presses against the socket block, which in turn presses against the spring. This allows the small and large gears to achieve efficient speed reduction and transmission.

[0008] Preferably, a sleeve-type locking block is engaged with the inner wall of one of the grooves, and a support shaft is fixedly connected to the inner wall of the sleeve-type locking block; a spring post is slidably installed on one side of the outer wall of the sleeve-type locking block, and a support block is provided on one side of the linkage shaft. The support block is rotatably connected to the linkage shaft and fixedly connected to the lifting frame. A reinforcing strip is provided on one side of the support block, and a reinforcing rod is fixedly connected to the inner wall of the reinforcing strip. A connecting strip is fixedly installed on the outer wall of the reinforcing rod. The support shaft is rotatably connected to the connecting strip, and the spring post is fixedly connected to the connecting strip. Both the reinforcing strip and the connecting strip are fixedly connected to the lifting frame, and a gap is provided between the reinforcing strip and the connecting strip. The vertical cross-section of the reinforcing rod is circular, and the connecting strip, the reinforcing rod, and the reinforcing strip can all be made of stainless steel.

[0009] When this technology is used, the connecting plate supports the linkage shaft, the lifting frame supports the support block to increase the stability of the linkage shaft, the lifting frame supports the reinforcing strip, and the reinforcing rod supports the connecting strip to achieve a firm limiting operation for the support shaft and the spring column.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] 1. This utility model adopts a linkage ratchet assembly. The linkage shaft drives the small gear to rotate, the small gear drives the large gear to mesh and rotate, the large gear drives the rotating shaft to rotate, the spool drives the rotating ratchet to rotate, and the rotating ratchet drives multiple grooves to rotate. The clockwise rotation of the rotating ratchet will squeeze the sleeve block. The small gear and the large gear can achieve deceleration and efficient transmission, which is more time-saving and labor-saving.

[0012] 2. This utility model adopts a socket plate to support the linkage shaft, which increases the stability of the linkage shaft; a support block to support the linkage shaft, which increases the stability of the linkage shaft; a reinforcing strip to support the reinforcing rod; and a reinforcing rod to support the connecting strip, which realizes a firm limiting operation for the support shaft and the spring column, greatly improving the stability of use. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of the ratchet device for the load-bearing trolley of the tower crane of this utility model.

[0014] Figure 2 This is a partial structural diagram of the connection between the lifting frame and the connecting plate of this utility model.

[0015] Figure 3 This is a partial structural diagram of the connection between the spool and the large gear of this utility model.

[0016] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0017] The attached diagram is labeled as follows: 1. Lifting frame; 2. Sleeve plate; 3. Linkage shaft; 4. Pinion; 5. Gear; 6. Rotating shaft; 7. Borehole; 8. Rotating ratchet; 9. Groove; 10. Sleeve locking block; 11. Support shaft; 12. Spring post; 13. Support block; 14. Reinforcing strip; 15. Reinforcing rod; 16. Connecting strip. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 - Figure 4 The diagram shows a ratchet device for a tower crane trolley. The ratchet device is equipped with a linkage ratchet assembly. The linkage ratchet assembly can achieve efficient transmission and speed reduction by rotating the ratchet 8 clockwise to press and engage the locking block 10. The pinion 4 and the large gear 5 can achieve efficient transmission and speed reduction, saving time and effort. The specific structure of the linkage ratchet assembly is as follows.

[0020] In this embodiment, as Figure 1 - Figure 4As shown, a connecting plate 2 is fixedly connected to the upper surface of the lifting frame 1. A linkage shaft 3 is rotatably connected to the inner wall of the connecting plate 2. A linkage ratchet assembly is provided on the outer wall of the linkage shaft 3. The linkage ratchet assembly includes a pinion 4, a large gear 5, a rotating shaft 6, a bobbin 7, a ratchet 8, and multiple slots 9. The pinion 4 is fixed to the outer wall of the linkage shaft 3, the large gear 5 is meshed and driven by the pinion 4, the rotating shaft 6 is fixed to the inner wall of the large gear 5, and the rotating shaft 6 is rotatably connected to the connecting plate 2. The bobbin 7 is fixed to one end of the rotating shaft 6, the ratchet 8 is fixed to the outer wall of the bobbin 7, and multiple slots 9 are all opened on the outer wall of the ratchet 8. The center point of the rotating shaft 6 and the center point of the bobbin 7 are on the same horizontal line, and the vertical cross-section of the rotating shaft 6 is circular. The multiple slots 9 are arranged in a circumferential distribution. Both the ratchet 8 and the bobbin 7 can be made of stainless steel.

[0021] In use, the ratchet device of this tower crane's trolley operates via a support plate 2 supported by the lifting frame 1, which in turn supports a linkage shaft 3. Rotating the linkage shaft 3 drives a small gear 4, which in turn drives a large gear 5, which in turn drives a rotating shaft 6. The rotating shaft 6 rotates within the support plate 2, driving a bobbin 7, which in turn drives a ratchet 8. The ratchet 8 then drives multiple grooves 9 to rotate, simultaneously rotating a support shaft 11. This support shaft 11 drives a connecting block 10, which in turn drives the ratchet 8 to rotate counter-clockwise. When the ratchet 8 rotates clockwise, it presses against the connecting block 10, which in turn presses against a spring 12. The spring 12 supports the connecting block 10, ensuring stable unidirectional drive for the ratchet 8. This allows for efficient and reduced-speed transmission between the small gear 4 and the large gear 5.

[0022] In this embodiment, as Figure 2 - Figure 3 As shown, a sleeve-type locking block 10 is engaged with the inner wall of one of the grooves 9, and a support shaft 11 is fixedly connected to the inner wall of the sleeve-type locking block 10. A spring pin 12 is slidably installed on one side of the outer wall of the sleeve-type locking block 10. A support block 13 is provided on one side of the linkage shaft 3. The support block 13 is rotatably connected to the linkage shaft 3 and is fixedly connected to the lifting frame 1. A reinforcing strip 14 is provided on one side of the support block 13. A reinforcing rod 15 is fixedly connected to the inner wall of the reinforcing strip 14, and a connecting strip 16 is fixedly installed on the outer wall of the reinforcing rod 15. The support shaft 11 is rotatably connected to the connecting strip 16, and the spring pin 12 is fixedly connected to the connecting strip 16. Both the reinforcing strip 14 and the connecting strip 16 are fixedly connected to the lifting frame 1, and there is a gap between the reinforcing strip 14 and the connecting strip 16. The vertical cross-section of the reinforcing rod 15 is circular. The connecting strip 16, the reinforcing rod 15, and the reinforcing strip 14 can all be made of stainless steel.

[0023] When the ratchet device of the tower crane's trolley is in use, the lifting frame 1 supports the connecting plate 2, and the connecting plate 2 supports the linkage shaft 3, increasing the stability of the linkage shaft 3. At the same time, the lifting frame 1 supports the support block 13, and the support block 13 supports the linkage shaft 3, increasing the stability of the linkage shaft 3. In this way, the lifting frame 1 supports the reinforcing bar 14, the reinforcing bar 14 supports the reinforcing rod 15, the reinforcing rod 15 supports the connecting bar 16, and the connecting bar 16 provides a firm limiting operation for the support shaft 11 and the spring column 12.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ratchet device for a tower crane trolley, comprising a lifting frame (1), wherein a connecting plate (2) is fixedly connected to the upper surface of the lifting frame (1), and a linkage shaft (3) is rotatably connected to the inner wall of the connecting plate (2), characterized in that: The outer wall of the linkage shaft (3) is provided with a linkage ratchet assembly; The linkage ratchet assembly includes a small gear (4), a large gear (5), a rotating shaft (6), a spool (7), a rotating ratchet (8), and multiple grooves (9); The small gear (4) is fixed on the outer wall of the linkage shaft (3), the large gear (5) is meshed and connected to the outer wall of the small gear (4), the rotating shaft (6) is fixed on the inner wall of the large gear (5), and the rotating shaft (6) is rotatably connected to the sleeve plate (2), the spool (7) is fixed on one end of the rotating shaft (6), the ratchet (8) is fixed on the outer wall of the spool (7), and multiple grooves (9) are opened on the outer wall of the ratchet (8).

2. The ratchet device for a tower crane trolley according to claim 1, characterized in that: The center point of the rotating shaft (6) and the center point of the linear shaft (7) are on the same horizontal line, and the vertical cross-section of the rotating shaft (6) is circular.

3. The ratchet device for a tower crane trolley according to claim 1, characterized in that: Multiple grooves (9) are arranged in a circular distribution, and the ratchet (8) and spool (7) can both be made of stainless steel.

4. The ratchet device for a tower crane trolley according to claim 1, characterized in that: A sleeve block (10) is snapped into the inner wall of one of the grooves (9), and a support shaft (11) is fixedly connected to the inner wall of the sleeve block (10). A spring post (12) is slidably installed on one side of the outer wall of the sleeve block (10). A support block (13) is provided on one side of the linkage shaft (3). The support block (13) is rotatably connected to the linkage shaft (3), and the support block (13) is fixedly connected to the lifting frame (1). A reinforcing strip (14) is provided on one side of the support block (13). A reinforcing rod (15) is fixedly connected to the inner wall of the reinforcing strip (14). A connecting strip (16) is fixedly installed on the outer wall of the reinforcing rod (15).

5. The ratchet device for a tower crane trolley according to claim 4, characterized in that: The support shaft (11) is rotatably connected to the connecting strip (16), and the spring pin (12) is fixedly connected to the connecting strip (16).

6. The ratchet device for a tower crane trolley according to claim 4, characterized in that: The reinforcing strip (14) and the connecting strip (16) are fixedly connected to the lifting frame (1), and there is a gap between the reinforcing strip (14) and the connecting strip (16).

7. The ratchet device for a tower crane trolley according to claim 4, characterized in that: The vertical cross-section of the reinforcing rod (15) is circular, and the connecting strip (16), the reinforcing rod (15), and the reinforcing strip (14) can all be made of stainless steel.

Images