Driving heavy hammer switch assembly

Abstract

The utility model relates to the technical field of heavy hammer switches, in particular to a travelling crane heavy hammer switch assembly which comprises a shell serving as a carrier of the whole assembly, a hook head is installed on a transmission wheel of the shell, a transmission piece used for controlling a lifting switch of the hook head is arranged on the shell, and the transmission piece comprises a supporting plate fixedly connected to the shell. A transmission frame is rotationally installed on the supporting plate, a chain is fixedly connected to the transmission frame, a heavy hammer is fixedly connected to the end of the chain, two limiting rings are fixedly connected to the heavy hammer, a touch switch and a connector are further arranged on the shell, and the hook head makes contact with the heavy hammer to lift the heavy hammer, so that the connector makes contact with the touch switch. According to the heavy hammer switch, the structure of the heavy hammer is optimized, the heavy hammer is optimized to be sleeved with the two steel wire ropes, shaking and rotating of the heavy hammer are avoided, switch misoperation is reduced, and the service life of the heavy hammer switch is greatly prolonged. Through the optimized design, the durability and the stability of the crane heavy hammer switch are remarkably improved, and a crane top rushing accident is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy hammer switches, in particular to a heavy hammer switch component for a crane. Background Art

[0002] Crane weight switch assemblies are widely used in industrial automation, particularly in cranes, hoists, and lifting equipment. Their primary function is to automatically control the power supply by sensing the load status, thereby ensuring the safety and reliability of the equipment during operation. Traditional weight switch assemblies rely on gravity, using the falling or rising weight to directly trigger the switch. However, the weight is typically sheathed in a wire rope, which can easily rotate and become entangled in the rope during crane operation. This can often lead to malfunctions, poor switch contact, and broken weight chains, increasing maintenance costs and equipment downtime. Damage to the hook's rise limiter can also cause the hook to overshoot. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a crane weight switch assembly, which has the advantages of avoiding the weight's shaking and rotation, reducing the switch's malfunction, and solving the problem that the weight's shaking easily rotates and gets entangled on the wire rope, causing frequent switch malfunctions.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A crane weight switch assembly includes a shell serving as a carrier for the entire assembly, a hook head being mounted on a transmission wheel of the shell, a transmission member for controlling the hook head lifting switch being provided on the shell, the transmission member including a support plate fixedly connected to the shell, a transmission frame being rotatably mounted on the support plate, a chain being fixedly connected to the transmission frame, a weight being fixedly connected to the end of the chain, two limit rings being fixedly connected to the weight, the limit rings being respectively sleeved on steel wire ropes of adjacent transmission wheels, a touch switch and a connector being further provided on the shell, the hook head contacts the weight to lift it so that the connector contacts the touch switch.

[0006] Preferably, a connecting rope is fixedly connected to the transmission frame, and a counterweight block for pulling the transmission frame to rotate to one side is fixedly connected to the bottom end of the connecting rope.

[0007] Preferably, a rack is fixed on the transmission frame, a screw is rotatably mounted on the outer shell, the end of the screw is fixed with a spur gear that meshes with the rack for transmission, a weight bar is fixed on the outer shell, a screw sleeve that is slidably connected to the weight bar and is threadedly connected to the screw, a touch switch is mounted on the end of the screw sleeve, a weight bar is also provided on the outer shell, and the connecting head is fixed to the weight bar.

[0008] Preferably, a bottom plate is fixed to the housing, and the load-bearing bar is mounted on the bottom plate by bolts, so that the distance between the touch switch and the connector can be adjusted.

[0009] Preferably, the weight of the counterweight is lighter than the weight of the heavy hammer, so that the connecting head does not contact the touch switch when the heavy hammer is not in contact with the hook head.

[0010] Preferably, a shaft is fixedly connected to the support plate, the transmission frame is rotatably mounted on the shaft, and the rack moves in a circular motion with the shaft as the center.

[0011] By means of the above technical solution, the utility model provides a crane weight switch assembly, which has at least the following beneficial effects:

[0012] 1. This crane weight switch assembly optimizes the weight structure, replacing it with a two-wire system. This prevents the weight from swinging and rotating, reduces malfunctions, and significantly increases the lifespan of the weight switch. This optimized design significantly improves the durability and stability of the crane weight switch, increasing its service life fivefold and preventing accidents caused by crane overshooting. This significantly contributes to safe production and cost savings.

[0013] 2. The heavy hammer switch assembly of the crane cuts off the switch by contacting on the same plane. It does not need to use gravity to cut off the switch, thus avoiding damage to the switch caused by gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model in the front view direction;

[0016] Figure 2 This is a schematic diagram of the structure of the transmission part of the utility model;

[0017] Figure 3 This is a schematic diagram of the external connection structure of the transmission frame of the utility model.

[0018] Reference numerals:

[0019] 100, housing; 101, transmission wheel; 102, hook;

[0020] 200, transmission part; 201, support plate; 202, connector; 203, load-bearing bar; 204, touch switch; 205, chain; 206, weight; 207, limit ring; 208, transmission frame; 209, connecting rope; 210, counterweight; 211, rack; 212, screw sleeve; 213, screw; 214, spur gear; 215, base plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] When the crane weight switch is frequently used and in a harsh working environment, the weight is easily entangled in the wire rope, causing problems such as poor contact and component damage in the switch, shortening the service life of the weight switch, increasing maintenance costs and equipment downtime, and in severe cases causing the crane hook head to hit the top.

[0023] Example 1:

[0024] The heavy hammer switch of the crane is frequently used and in a bad working environment. The heavy hammer 206 is easy to be entangled with the wire rope, causing problems such as poor contact and component damage of the switch, which shortens the service life of the heavy hammer 206 switch, increases maintenance costs and equipment downtime, and in severe cases causes the crane hook head 102 to hit the top accident. In order to solve the above problems, combined with Figure 1-Figure 3 As shown, the utility model provides a crane weight switch assembly, including a shell 100 as a carrier of the entire assembly, a hook head 102 is installed on the transmission wheel 101 of the shell 100, and a transmission member 200 for controlling the lifting switch of the hook head 102 is provided on the shell 100, which can accurately control the lifting and lowering of the hook head 102, thereby ensuring that the hook head 102 can be accurately in place during operation, thereby improving the accuracy of the operation.

[0025] The original weight hammer 206 is sheathed with a steel wire rope. When the crane is running, the weight hammer 206 shakes and easily rotates and entangles on the steel wire rope, often causing malfunction of the switch, poor contact of the switch, and damage to the weight hammer 206 chain 205, which increases maintenance costs and equipment downtime. In the case of damage to the rising limit of the hook head 102, it will cause the hook head 102 to hit the top. The transmission member 200 includes a support plate 201 fixed to the housing 100, a transmission frame 208 is rotatably mounted on the support plate 201, and a chain 205 is fixed to the transmission frame 208. A heavy hammer 206 is fixed to the end of the chain 205, and two limit rings 207 are fixed to the heavy hammer 206. The limit rings 207 are respectively mounted on the steel wire ropes of the adjacent transmission wheels 101. A touch switch 204 and a connector 202 are also provided on the housing 100. The hook head 102 contacts the heavy hammer 206 to lift it up so that the connector 202 contacts the touch switch 204, and is covered with two limit rings 207, which prevents the heavy hammer 206 from shaking and rotating, reduces the switch malfunction, and greatly increases the service life of the heavy hammer 206 switch.

[0026] Specifically, a connecting rope 209 is fixed to the transmission frame 208, and a counterweight 210 is fixed to the bottom end of the connecting rope 209 for pulling the transmission frame 208 to rotate to one side. When the hook head 102 rises and lifts the heavy hammer 206, the counterweight 210 pulls the transmission frame 208 to rotate to one side through the connecting rope 209, so that the connecting head 202 contacts the touch switch 204, and the switch is actuated to cut off the driving power supply.

[0027] Furthermore, a shaft is fixed to the support plate 201 , the transmission frame 208 is rotatably mounted on the shaft, and the rack 211 moves in a circular motion with the shaft as the center, so that the rack 211 can always mesh with the spur gear 214 .

[0028] According to the embodiment, the above optimized design significantly improves the durability and stability of the crane weight switch, increases its service life by five times, and avoids the occurrence of crane top-impact accidents, which plays a very important role in production safety and cost savings.

[0029] Example 2:

[0030] Combine Figure 1-Figure 3 As shown, on the basis of embodiment 1, a rack 211 is fixed on the transmission frame 208, and a screw 213 is rotatably installed on the housing 100. The end of the screw 213 is fixedly connected to a spur gear 214 that meshes with the rack 211 for transmission. A weight bar 203 is fixed on the housing 100, and a screw sleeve 212 that is threadedly connected to the screw 213 is slidably connected to the weight bar 203. The touch switch 204 is installed at the end of the screw sleeve 212. The housing 100 is also provided with a weight bar 203, and the connecting head 202 is fixed to the weight bar 203. The rack 211 drives the screw 213 to rotate through the spur gear 214. The rotation of the screw 213 causes the screw sleeve 212 to move, and the connecting head 202 moves with the screw 213. Then the connecting head 202 contacts the touch switch 204, and the switch is cut off by contact on the same plane. There is no need to use gravity pressing to cut off the switch, thereby avoiding damage to the switch caused by gravity.

[0031] Specifically, a base plate 215 is fixed to the housing 100, and the weight bar 203 is installed on the base plate 215 by bolts. The distance between the touch switch 204 and the connector 202 can be adjusted. The distance between the connector 202 and the touch switch 204 can be adjusted according to actual requirements, and then the time required for the switch to cut off the power supply can be controlled. The larger the distance, the longer the time required to cut off the power supply, and vice versa. More precise control can be achieved, making the switch cutting timing more accurate, which helps to improve the safety of operation.

[0032] Furthermore, the weight of the counterweight 210 is lighter than the weight of the hammer 206 . When the hammer 206 is not in contact with the hook head 102 , the connector 202 is not in contact with the trigger switch 204 .

[0033] From the above embodiment, it can be seen that: first, the transmission wheel 101 runs to drive the hook head 102 below to move upward, and then the hook head 102 contacts the weight 206 to lift it, and the counterweight block 210 loses the restraining force of the weight 206. The counterweight block 210 moves downward under the action of gravity, and then the transmission frame 208 is pulled to one side through the connecting rope 209, and the rack 211 moves with the transmission frame 208. The rack 211 drives the screw 213 to rotate through the spur gear 214. The rotation of the screw 213 causes the screw sleeve 212 to move, and the connector 202 moves with the screw 213. Then the connector 202 contacts the touch switch 204 to cut off the power.

[0034] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heavy hammer switch assembly for a crane, comprising a housing (100) serving as a carrier of the entire assembly, a driving wheel (101) of the housing (100) being provided with a hook (102), and characterized in that: The housing (100) is provided with a transmission member (200) for controlling the lifting switch of the hook head (102); The transmission member (200) includes a support plate (201) fixed to the housing (100), a transmission frame (208) rotatably mounted on the support plate (201), a chain (205) fixed to the transmission frame (208), a weight (206) fixed to the end of the chain (205), two limiting rings (207) fixed to the weight (206), the limiting rings (207) respectively sleeved on the steel wire ropes of the adjacent transmission wheels (101), and a touch switch (204) and a connector (202) are also provided on the housing (100), the hook head (102) contacts the weight (206) to lift it so that the connector (202) contacts the touch switch (204).

2. The crane weight switch assembly according to claim 1, characterized in that: The transmission frame (208) is also fixedly connected with a connecting rope (209), and the bottom end of the connecting rope (209) is fixedly connected with a counterweight (210) for pulling the transmission frame (208) to rotate to one side.

3. The crane weight switch assembly according to claim 2, characterized in that: A rack (211) is fixedly connected to the transmission frame (208), a screw (213) is rotatably mounted on the housing (100), an end of the screw (213) is fixedly connected to a spur gear (214) meshing with the rack (211) for transmission, a weight bar (203) is fixedly connected to the housing (100), a screw sleeve (212) threadedly connected to the screw (213) is slidably connected to the weight bar (203), a touch switch (204) is mounted on the end of the screw sleeve (212), a weight bar (203) is further provided on the housing (100), and a connector (202) is fixedly connected to the weight bar (203).

4. The crane weight switch assembly according to claim 3, characterized in that: A bottom plate (215) is fixedly connected to the housing (100), and the load-bearing bar (203) is mounted on the bottom plate (215) by means of bolts, so that the distance between the touch switch (204) and the connector (202) can be adjusted.

5. The crane weight switch assembly according to claim 2, characterized in that: The weight of the counterweight (210) is lighter than the weight of the heavy hammer (206), and when the heavy hammer (206) is not in contact with the hook head (102), the connecting head (202) is not in contact with the touch switch (204).

6. The crane weight switch assembly according to claim 1, characterized in that: A shaft is fixedly connected to the support plate (201), a transmission frame (208) is rotatably mounted on the shaft, and the rack (211) moves in a circular motion with the shaft as the center.

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