Limiting heavy hammer of crane

Abstract

The utility model relates to the technical field of cranes, and discloses a crane limiting heavy hammer which comprises a first hammer body and a second hammer body, and a first opening and closing groove and a second opening and closing groove are formed in the two sides of the first hammer body and the two sides of the second hammer body respectively. The convex lugs on one side of the first hammer body and the convex lugs on one side of the second hammer body are arranged in a staggered mode and are connected from top to bottom in a penetrating mode through the pin shaft, so that the two groups of hammer bodies form a clamping jaw structure with an opening in one side, and the positioning mechanisms are arranged on the sides, close to the second opening and closing grooves, of the first hammer body and the second hammer body. A positioning plate in the positioning mechanism can be transversely opened and closed along a positioning groove, a positioning rod on one side of the positioning groove and an end positioning block can penetrate through a positioning hole formed in the front face of the positioning plate, the positioning block is rotated and arranged in a crossed mode with the positioning hole, and therefore the positioning plate and the first hammer body can be quickly connected and positioned; the positioning block is rotationally connected with the positioning hole, so that the first hammer body and the second opening and closing groove in one side of the second hammer body can be opened and closed.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a crane limiting weight. Background Art

[0002] A lifting height limiter should be used on the crane to improve its safety. A heavy hammer type lifting height limiter is a commonly used lifting height limiter. The heavy hammer is passed through the lifting wire rope. When the hook is raised to the set height, the collision mechanism on the hook will lift the heavy hammer, loosen the wire rope suspending the heavy hammer and no longer tighten it, thereby triggering the limit switch, disconnecting the circuit, and the hook no longer moves upward, thus limiting the maximum lifting height; when the hook moves downward and no longer lifts the heavy hammer, the wire rope suspending the heavy hammer is tightened again, triggering the limit switch, closing the circuit again, and the heavy hammer type limiter returns to normal.

[0003] For example, the Chinese patent authorization announcement number is CN207243272U, "A weight for a lifting height limiter, a lifting height limiter and a crane. The weight for the lifting height limiter comprises a first hammer body and a second hammer body connected to each other; in the horizontal direction, a first lug is provided on the first side of the first hammer body, a second lug is provided on the first side of the second hammer body, and the first lug and the second lug are connected by a first pin; the second side of the first hammer body is detachably connected to the second side of the second hammer body";

[0004] In the above-mentioned reference document, the first side of the first hammer body is connected or separated from the first side of the second hammer body by the first latch, thereby avoiding the use of threaded connection such as screws or bolts, thus avoiding the operation process of screwing in the screws or bolts, and avoiding the use of auxiliary tools to tighten or loosen the screws or bolts, thereby simplifying the disassembly and assembly operation process and improving the disassembly and assembly efficiency;

[0005] However, the two sides of the two hammer bodies in the above-mentioned crane limit hammer are assembled by disassembling the longitudinal pins. During disassembly and assembly, the longitudinal pins need to be pulled out from the lug insertion position. When the wire rope between the two hammer bodies is disassembled and assembled, the longitudinal pull-out or insertion of the pins has a large movement amplitude, and the pins are easily deformed after contacting with the lugs on the two groups of hammer bodies. Disassembly and assembly are convenient, but the disassembly and assembly takes a long time. Utility Model Content

[0006] The utility model aims to provide a crane limit weight, which can realize rapid disassembly and assembly between two hammer bodies through small movements, so that the steel wire rope in the weight is convenient to take and put.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crane limiting weight, comprising a first hammer body and a second hammer body, wherein the first hammer body and the second hammer body are respectively provided with a first opening and closing groove and a second opening and closing groove on both sides, and lugs are respectively integrally formed on the side walls of the first opening and closing groove on one side of the first hammer body and the second hammer body, and a positioning mechanism is provided in the middle of the second opening and closing groove, wherein the positioning mechanism comprises a positioning plate rotatably mounted on one side of the second hammer body, a positioning hole is penetrated at one end of the positioning plate, a positioning rod is fixedly mounted on one side of the first hammer body, a positioning block is fixedly mounted on the front end of the positioning rod, and the positioning rod and the positioning block movably penetrate the positioning hole and extend to the front side of the positioning plate.

[0008] Preferably, the inner walls of the first hammer body and the second hammer body are respectively provided with through holes and through blocks on one side close to the positioning mechanism, and the through blocks integrally formed on the inner walls of the first hammer body and the second hammer body are respectively inserted into the corresponding through holes.

[0009] Preferably, the multiple groups of lugs on the inner wall of the first opening and closing groove are arranged in a staggered manner, and pin shafts are connected through the pin holes on the tops of the adjacent lugs on both sides.

[0010] Preferably, a positioning groove is formed in the middle of one side of the first hammer body and the second hammer body close to the positioning mechanism, and the positioning plate is hinged to one side of the inner wall of the positioning groove.

[0011] Preferably, a torsion spring is sleeved on the outside of the positioning rod, one end of the torsion spring is fixedly mounted on the inner wall of the positioning groove, and the other end of the torsion spring is rotatably mounted on the side surface of the positioning block.

[0012] Preferably, the positioning block movably passes through the inner wall of the positioning hole and extends to the front side of the positioning plate, and the positioning block and the positioning hole are in a cross-shaped structure.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The lugs on one side of the first hammer body and the second hammer body are arranged in a staggered manner and connected with a pin shaft from top to bottom, so that the two groups of hammer bodies form a clamping claw structure with one side open, and a positioning mechanism is provided on the first hammer body and the second hammer body near the second opening and closing groove. The positioning plate in the positioning mechanism can be opened and closed horizontally along the positioning groove, and the positioning rod and the end positioning block on one side of the positioning groove can pass through the positioning hole opened on the front side of the positioning plate, and the positioning block is rotated to be arranged crosswise with the positioning hole to realize the rapid connection and positioning of the positioning plate and the first hammer body. In this way, the first hammer body and the second opening and closing groove on one side of the second hammer body can be opened and closed by rotating the positioning block and the positioning hole. Compared with the two groups of hammer bodies in the existing crane limit heavy hammer, there is no need to pull out the pin shafts on one side of the two groups of hammer bodies through a large action, and the wire rope in the hammer body can be taken and placed, and the disassembly and assembly are faster and more convenient. At the same time, the problem that the pin shafts that penetrate the two hammer bodies longitudinally are deformed after being connected and cannot be pulled out is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the positioning mechanism structure in the utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of split structure;

[0018] Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0019] In the figure: 1, first hammer body; 2, second hammer body; 3, positioning mechanism; 4, first opening and closing slot; 5, through-hole; 31, positioning slot; 32, positioning plate; 33, positioning rod; 34, torsion spring; 35, positioning block; 36, positioning hole; 41, lug; 42, second opening and closing slot; 43, pin shaft; 51, through-hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] See also Figure 1-4 The utility model provides a technical solution: a crane limit weight hammer, comprising a first hammer body 1 and a second hammer body 2, wherein a first opening and closing groove 4 and a second opening and closing groove 42 are respectively arranged on both sides of the first hammer body 1 and the second hammer body 2, and a lug 41 is integrally formed on the side wall of the first opening and closing groove 4 located on one side of the first hammer body 1 and the second hammer body 2 through mold casting;

[0022] A positioning mechanism 3 is provided in the middle of the second opening and closing groove 42, and the positioning mechanism 3 includes a positioning plate 32 rotatably mounted on one side of the second hammer body 2, and a positioning hole 36 is penetrated at one end of the positioning plate 32, a positioning rod 33 is fixedly mounted on one side of the first hammer body 1, and a positioning block 35 is fixedly mounted on the front end of the positioning rod 33, and the positioning rod 33 and the positioning block 35 movably penetrate the positioning hole 36 and extend to the front of the positioning plate 32;

[0023] After the first hammer body 1 and the second hammer body 2 are assembled, a symmetrical semicircular hole structure is formed inside, which can be used to thread the crane hoisting wire rope;

[0024] The lugs 41 on one side of the first hammer body 1 and the second hammer body 2 are arranged in a staggered manner and connected from top to bottom by a pin shaft 43, so that the two groups of hammer bodies form a clamping structure with one side open, and a positioning mechanism 3 is provided on the side of the first hammer body 1 and the second hammer body 2 near the second opening and closing groove 42. The positioning plate 32 in the positioning mechanism 3 can be opened and closed laterally along the positioning groove 31, and the positioning rod 33 on one side of the positioning groove 31 and the end positioning block 35 can pass through the positioning hole 36 opened on the front side of the positioning plate 32. By rotating the positioning block 35, the positioning plate 32 can be opened and closed laterally along the positioning groove 31. The holes 36 are arranged in a cross pattern, so that the positioning plate 32 can be quickly connected and positioned with the first hammer body 1. In this way, the first hammer body 1 and the second hammer body 2 can be opened and closed by rotating the positioning block 35 with the positioning hole 36. Compared with the two groups of hammer bodies in the existing crane limit hammer, it is not necessary to pull out the pins 43 on one side of the two groups of hammer bodies through a large movement, so that the wire rope in the hammer body can be taken out and placed, and the disassembly and assembly is faster and more convenient. At the same time, it avoids the problem that the pins 43 that penetrate the two hammer bodies longitudinally are deformed after being connected and cannot be pulled out;

[0025] Among them, the inner walls of the first hammer body 1 and the second hammer body 2 are respectively provided with a through hole 5 and a through block 51 near the positioning mechanism 3. The through blocks 51 located on the inner walls of the first hammer body 1 and the second hammer body 2 and integrally formed by mold casting are respectively inserted into the corresponding through holes 5. After the first hammer body 1 and the second hammer body 2 are connected and positioned near the second opening and closing groove 42 by the positioning mechanism 3, the through blocks 51 on one side of the two sets of hammer bodies are connected with the corresponding through holes 5, so that the two hammer bodies are in contact with each other and the connection is more stable.

[0026] Among them, multiple groups of lugs 41 located on the inner wall of the first opening and closing groove 4 are arranged in a staggered manner, and the pin shafts 43 are connected through the pin holes on the tops of the adjacent lugs 41 on both sides. After the lugs 41 on one side of the first hammer body 1 and the second hammer body 2 are arranged in a staggered manner, they are connected from top to bottom with the pin shaft 43, so that the two groups of hammer bodies form a clamping structure with one side open.

[0027] Among them, a positioning groove 31 is opened in the middle of the first hammer body 1 and the second hammer body 2 near the positioning mechanism 3, and the positioning plate 32 is hinged to one side of the inner wall of the positioning groove 31. A torsion spring 34 is sleeved on the outside of the positioning rod 33. One end of the torsion spring 34 is fixedly installed on the inner wall of the positioning groove 31, and the other end of the torsion spring 34 is rotatably installed on the side of the positioning block 35. The positioning block 35 movably passes through the inner wall of the positioning hole 36 and extends to the front of the positioning plate 32. The positioning block 35 and the positioning hole 36 are in a cross-shaped structure. The first hammer body 1 and the second hammer body 2 are near the second opening and closing groove 4 2 is provided with a positioning mechanism 3 on one side, and a positioning plate 32 in the positioning mechanism 3 can be opened and closed horizontally along the positioning groove 31, and a positioning rod 33 and an end positioning block 35 on one side of the positioning groove 31 can pass through a positioning hole 36 provided on the front side of the positioning plate 32, and the positioning block 35 is rotated to be arranged crosswise with the positioning hole 36, so that the positioning plate 32 and the first hammer body 1 can be quickly connected and positioned, so that the first hammer body 1 and the second opening and closing groove 42 on one side of the second hammer body 2 can be opened and closed by rotating the positioning block 35 and the positioning hole 36.

[0028] Working principle: When the steel wire rope between the two groups of hammer bodies in the crane limit weight is taken out, the positioning block 35 in the positioning mechanism 3 near the second opening and closing groove 42 of the first hammer body 1 and the second hammer body 2 can be rotated. After the positioning block 35 is rotated to overlap the positioning hole 36, the positioning block 35 releases the interference with one side of the positioning plate 32, so that the positioning plate 32 can be unfolded along the positioning groove 31, so that the second opening and closing groove 42 on one side of the first hammer body 1 and the second hammer body 2 can be unfolded;

[0029] The lugs 41 on one side of the first hammer body 1 and the second hammer body 2 are arranged in a staggered manner and connected from top to bottom by a pin shaft 43, so that the two groups of hammer bodies form a clamping structure with one side open, so that the first hammer body 1 and the second hammer body 2 can be unfolded along the pin shaft 43 to form a clamping structure, so that the internal wire rope can be taken out;

[0030] Similarly, when installing the steel wire rope inside the first hammer body 1 and the second hammer body 2, the steel wire rope can be placed between the two hammer bodies through the second opening and closing groove 42, and then the positioning plate 32 is closed along the positioning groove 31, so that one end of the positioning plate 32 is connected with the positioning rod 33 and the positioning block 35 on one side of the first hammer body 1, and the positioning rod 33 and the end positioning block 35 can pass through the positioning hole 36 opened on the front side of the positioning plate 32. By rotating the positioning block 35 and crisscrossing with the positioning hole 36, the positioning plate 32 and the first hammer body 1 can be quickly connected and positioned. In this way, the second opening and closing groove 42 on one side of the first hammer body 1 and the second hammer body 2 can be opened and closed by rotating the positioning block 35 and the positioning hole 36.

[0031] 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 and modifications may be made to the embodiments without departing from the principles of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane limit hammer, comprising a first hammer body (1) and a second hammer body (2), characterized in that: A first opening and closing groove (4) and a second opening and closing groove (42) are respectively arranged on both sides of the first hammer body (1) and the second hammer body (2); lugs (41) are respectively integrally formed on the side walls of the first opening and closing groove (4) located on one side of the first hammer body (1) and the second hammer body (2); a positioning mechanism (3) is arranged in the middle of the second opening and closing groove (42); the positioning mechanism (3) comprises a positioning plate (32) rotatably mounted on one side of the second hammer body (2); a positioning hole (36) is penetrated through one end of the positioning plate (32); a positioning rod (33) is fixedly mounted on one side of the first hammer body (1); a positioning block (35) is fixedly mounted on the front end of the positioning rod (33); the positioning rod (33) and the positioning block (35) movably penetrate the positioning hole (36) and extend to the front side of the positioning plate (32).

2. The crane limit weight according to claim 1, characterized in that: A through hole (5) and a through block (51) are respectively provided on the inner wall of the first hammer body (1) and the second hammer body (2) on the side close to the positioning mechanism (3); the through blocks (51) integrally formed on the inner wall of the first hammer body (1) and the second hammer body (2) are respectively inserted into the corresponding through holes (5).

3. The crane limit weight according to claim 2, characterized in that: A plurality of groups of lugs (41) located on the inner wall of the first opening and closing groove (4) are arranged in a staggered manner, and pin shafts (43) are connected through the pin holes at the tops of the adjacent lugs (41) on both sides.

4. The crane limit weight according to claim 3, characterized in that: A positioning groove (31) is provided in the middle of one side of the first hammer body (1) and the second hammer body (2) close to the positioning mechanism (3), and the positioning plate (32) is hinged to one side of the inner wall of the positioning groove (31).

5. The crane limit weight according to claim 4, characterized in that: The positioning rod (33) is sleeved with a torsion spring (34) on its exterior, one end of the torsion spring (34) is fixedly mounted on the inner wall of the positioning groove (31), and the other end of the torsion spring (34) is rotatably mounted on the side surface of the positioning block (35).

6. The crane limit weight according to claim 5, characterized in that: The positioning block (35) movably penetrates the inner wall of the positioning hole (36) and extends to the front side of the positioning plate (32); the positioning block (35) and the positioning hole (36) are in a cross-shaped structure.

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