Crown block lifting hook fixed pulley with long service life
The crane hook fixed pulley with a rotating design addresses wear issues by incorporating a connecting shaft and pulleys, enhancing the service life of both components.
Patent Information
- Application Number
- CN202420867519.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-25
AI Technical Summary
Existing crane hook fixed pulleys suffer from wear due to the inability of the middle pulley to rotate, leading to reduced service life of both the pulley and the wire rope.
A crane hook fixed pulley design with a connecting shaft and two pulleys that allow rotation, featuring movable metal plates, metal rods, and limiting plates to facilitate smooth operation and prevent damage to the lifting rope.
The design extends the service life of the pulley by three times and the wire rope by 1/4, reducing wear through rotational movement.
Smart Images
Figure CN222273975U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hook fixed pulleys, in particular to a crane hook fixed pulley with a long service life. Background Art
[0002] The overhead crane lifting equipment in the factory generally controls the direction and rise of the hoisting device through the cooperation of wire rope, movable pulley, fixed pulley and drum.
[0003] The fixed pulley of the hook of a 20t overhead crane currently in the market is generally composed of three pulleys, and the middle pulley is a fixed pulley that cannot rotate. The traditional design only considers that the middle pulley does not need to rotate during normal operation, but does not consider that the swing amplitude of the hook during normal operation also requires the middle pulley to rotate, otherwise it will cause wear on the pulley itself and the wire rope. Utility Model Content
[0004] The utility model aims to provide a fixed pulley for a crane hook with a long service life, so as to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixed pulley for a crane hook with a long service life, comprising a connecting shaft and a pulley 1, the left surface of the connecting shaft is movably connected with a metal plate 2, the right surface of the connecting shaft is movably connected with a metal plate 1, a metal sleeve rod is welded to the left surface of the metal plate 1, a metal plug rod is welded to the right surface of the metal plate 2, the right end surface of the connecting shaft is installed on the connecting shell, a limiting plate 1 is welded to the right end of the connecting shaft, a limiting plate 2 is connected to the middle surface of the connecting shaft, a connecting piece is inserted in the middle of the connecting shaft, a pulley 2 is installed in the middle position of the connecting shaft, a pin is welded on the bottom end surface of the connecting piece, a hole is opened at the upper end of the pulley 1, and the pulley 1 is installed in the middle position of the connecting shaft.
[0006] Preferably, there are two pulleys one, two of which are installed at the left and right ends of the connecting shaft, and pulley one is connected to the left surface of the limiting plate one, and two of pulley one are installed on the left and right sides of pulley two. The two pulleys one facilitate the rolling of the lifting rope, can avoid damage to the lifting rope, and can increase the use time of the lifting rope.
[0007] Preferably, the connecting parts are divided into three groups, and the three groups of connecting parts are evenly spaced on the surface of the connecting shaft. The middle connecting part is installed on the inner wall surface of pulley two, and the connecting parts on the left and right sides are installed on the inner wall surface of pulley one. The number of connecting parts in a group is two, and the two connecting parts are installed on the top end surface and the bottom end surface of the connecting shaft. The connecting parts can connect pulley one and pulley two, allowing pulley one and pulley two to roll, thereby avoiding damage to the lifting rope.
[0008] Preferably, the connecting shaft is connected to the surface of the metal sleeve rod, the connecting shaft is connected to the surface of the metal insertion rod, the metal sleeve rod is connected to the right end of the metal insertion rod, and the metal insertion rod and the metal sleeve rod are plugged into each other, so that the positions of pulley one and pulley two can be fixed.
[0009] Preferably, the number of the pins is six, two of the pins form a group, and the three groups of pins are evenly spaced and distributed inside the connecting shaft. The left end metal pin is plugged into the left end of the metal plug rod, and the right end metal pin is plugged into the right end of the metal sleeve rod. The metal pin is plugged into the metal sleeve rod and the metal.
[0010] Preferably, there are two limit plates 2, and the two limit plates 2 are connected to the left surface and the right surface of the pulley 2. The two limit plates 2 can fix the position of the pulley 2, making the rotation of the pulley 2 faster and more convenient.
[0011] Preferably, the connecting shell is connected to the left surface of the limiting plate one, and the connecting shell is connected to the right surface of the limiting plate two. The limiting plate two and the limiting plate one have the same length, and the limiting plate one and the limiting plate two can fix the pulley one and the pulley two.
[0012] Preferably, the pulley one and the pulley two are consistent in shape and size, and the hole is opened at the upper end of the pulley two.
[0013] Compared with the prior art, the utility model has the following beneficial effects: the crane hook fixed pulley has a long service life; the original 20-ton crane hook fixed pulley group has a fixed middle pulley that cannot rotate, which easily causes wear on the fixed pulley itself and the wire rope; after using this technology, the fixed pulley can be rotated to reduce the wear on the pulley and the wire rope, and the service life of the pulley group is extended by three times, and the service life of the wire rope is extended by 1 / 4. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the internal structure of the utility model;
[0015] Figure 2 For this utility model Figure 1 A schematic diagram of the partial enlargement of the structure at A in the figure.
[0016] In the figure: 1. Pulley 1; 2. Pulley 2; 3. Metal plate 1; 4. Limit plate 1; 5. Limit plate 2; 6. Metal plug rod; 7. Connecting shaft; 8. Connecting piece; 9. Pin; 10. Metal sleeve rod; 11. Hole; 12. Connecting shell; 13. Metal plate 2. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1-2 , the utility model provides a technical solution:
[0019] A crane hook fixed pulley with a long service life comprises a connecting shaft 7 and a pulley 1, wherein the number of pulleys 1 is two, the two pulleys 1 are mounted on the left end and the right end of the connecting shaft 7, the pulley 1 is slidably connected to the left surface of the limiting plate 4, the two pulleys 1 are mounted on the left and right sides of the pulley 2, the two pulleys 1 are convenient for the lifting rope to roll, the lifting rope can be prevented from being damaged, and the service life of the lifting rope can be increased, the left surface of the connecting shaft 7 is movably connected with a metal plate 2 13, the right surface of the connecting shaft 7 is movably connected with a metal plate 3, the left surface of the metal plate 3 is welded with a metal sleeve rod 10, the right surface of the metal plate 2 13 is welded with a metal plug rod 6, the connecting shaft 7 is movably connected to the metal plate 13, and the metal plate 13 is welded with a metal sleeve rod 10. The surface of the metal sleeve rod 10 is connected to the surface of the metal plug rod 6 on which the connecting shaft 7 is movably connected. The metal sleeve rod 10 is movably connected to the right end of the metal plug rod 6. The metal plug rod 6 and the metal sleeve rod 10 are plugged together, so that the positions of the pulley 1 and the pulley 2 can be fixed. The right end surface of the connecting shaft 7 is installed on the connecting shell 12. The right end of the connecting shaft 7 is welded with a limiting plate 4. The connecting shell 12 is fixedly connected to the left surface of the limiting plate 4. The connecting shell 12 is fixedly connected to the right surface of the limiting plate 2 5. The limiting plate 2 5 is the same length as the limiting plate 1 4. The limiting plate 1 4 and the limiting plate 2 5 can fix the pulley 1 and the pulley 2 2. The surface in the middle of the connecting shaft 7 A limit plate 25 is fixedly connected, and the number of limit plates 25 is two. The two limit plates 25 are movably connected to the left and right surfaces of the pulley 2. The two limit plates 25 can fix the position of the pulley 2, making the rotation of the pulley 2 faster and more convenient. A connecting piece 8 is inserted in the middle of the connecting shaft 7. The connecting piece 8 is divided into three groups. The three groups of connecting pieces 8 are evenly spaced on the surface of the connecting shaft 7. The middle connecting piece 8 is installed on the inner wall surface of the pulley 2, and the left and right side connecting pieces 8 are installed on the surface of the inner wall of the pulley 1. The number of a group of connecting pieces 8 is two, and the two connecting pieces 8 are installed on the top and bottom surfaces of the connecting shaft 7. The connecting piece 8 can connect the pulley 1 and Pulley 2 is connected to allow pulley 1 and pulley 2 to roll, thereby avoiding damage to the lifting rope. Pulley 2 is installed in the middle position of the connecting shaft 7. A pin 9 is welded on the bottom surface of the connecting piece 8. There are six pins 9, two pins 9 form a group, and three groups of pins 9 are evenly spaced and distributed inside the connecting shaft 7. The left end metal pin 9 is plugged into the left end of the metal plug rod 6, and the right end metal pin 9 is plugged into the right end of the metal sleeve rod 10. The metal pin 9 is plugged into the metal sleeve rod 10 and the metal. A hole 11 is opened at the upper end of pulley 1, and pulley 1 is installed in the middle position of the connecting shaft 7. Pulley 1 and pulley 2 are of the same shape and size, and the hole 11 is opened at the upper end of pulley 2.
[0020] When in use, the fixed pulley block of the 20-ton overhead crane is removed and the pulley block is disassembled. After disassembly, the middle pulley piece can be free to rotate by adding bearings. Then the fixed pulley is assembled and restored to its original position. After the wire rope is passed through, during normal operation, the middle pulley piece can swing freely with the wire rope to reduce the wear of the wire rope on the pulley piece.
[0021] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A crane hook fixed pulley with a long service life, comprising a connecting shaft (7) and a pulley 1 (1), characterized in that: The left side surface of the connecting shaft (7) is connected to a metal plate 2 (13), the right side surface of the connecting shaft (7) is connected to a metal plate 1 (3), the left side surface of the metal plate 1 (3) is welded with a metal sleeve rod (10), the right side surface of the metal plate 2 (13) is welded with a metal plug rod (6), the right end surface of the connecting shaft (7) is mounted on a connecting housing (12), the right end of the connecting shaft (7) is welded with a limiting plate 1 (4), the middle surface of the connecting shaft (7) is connected to a limiting plate 2 (5), a connecting piece (8) is inserted in the middle of the connecting shaft (7), a pulley 2 (2) is mounted in the middle position of the connecting shaft (7), a pin (9) is welded on the bottom end surface of the connecting piece (8), a hole (11) is opened at the upper end of the pulley 1 (1), and the pulley 1 (1) is mounted in the middle position of the connecting shaft (7).
2. The fixed pulley of a crane hook with a long service life according to claim 1, characterized in that: The number of the pulley one (1) is two, and the two pulleys one are installed at the left end and the right end of the connecting shaft (7). The pulley one (1) is connected to the left surface of the limiting plate one (4), and the two pulleys one (1) are installed on the left and right sides of the pulley two (2).
3. The fixed pulley of a crane hook with a long service life according to claim 2, characterized in that: The connecting members (8) are divided into three groups. The three groups of connecting members (8) are evenly spaced on the surface of the connecting shaft (7). The middle connecting member (8) is installed on the inner wall surface of the second pulley (2). The connecting members (8) on the left and right sides are installed on the inner wall surface of the first pulley (1). The number of connecting members (8) in one group is two, and the two connecting members (8) are installed on the top end surface and the bottom end surface of the connecting shaft (7).
4. The fixed pulley of a crane hook with a long service life according to claim 2, characterized in that: The connecting shaft (7) is connected to the surface of the metal sleeve rod (10), the connecting shaft (7) is connected to the surface of the metal insertion rod (6), and the metal sleeve rod (10) is connected to the right end of the metal insertion rod (6).
5. The fixed pulley of a crane hook with a long service life according to claim 1, characterized in that: The number of the latch pins (9) is six, two of the latch pins (9) form a group, and three groups of the latch pins (9) are distributed inside the connecting shaft (7) at equal intervals, the left end of the latch pin (9) being plugged into the left end of the metal plug rod (6), and the right end of the latch pin (9) being plugged into the right end of the metal sleeve rod (10).
6. The fixed pulley of a crane hook with a long service life according to claim 1, characterized in that: The number of the second limiting plates (5) is two, and the two second limiting plates (5) are connected to the left surface and the right surface of the pulley (2).
7. The fixed pulley of a crane hook with a long service life according to claim 1, characterized in that: The connecting shell (12) is connected to the left side surface of the limiting plate 1 (4), and the connecting shell (12) is connected to the right side surface of the limiting plate 2 (5), and the limiting plate 2 (5) and the limiting plate 1 (4) have the same length.
8. The fixed pulley of a crane hook with a long service life according to claim 1, characterized in that: The pulley 1 (1) and the pulley 2 (2) have the same shape and size, and the hole (11) is opened at the upper end of the pulley 2 (2).