Novel heavy hammer limiting protection device for chain hoist

Abstract

The utility model relates to a novel counter weight limit protection device for a chain hoist, which comprises a mounting plate, a limit switch, a rotary swing arm, a multi-section swing rod and a lantern ring, the mounting plate is mounted below a main body of the chain hoist, and the limit switch is mounted on one side, close to the lower end, of the mounting plate. One end of the rotating swing arm is installed at the lower end of the installation plate in an up-down rotating mode and located below the limiting switch, the other end of the rotating swing arm is horizontally connected with one end of the multi-section swing rod in a rotating mode, the other end of the multi-section swing rod is connected with one side of the lantern ring, and the lantern ring is installed on the outer side of a loop chain, with a lifting hook, of the loop chain hoist in a sleeving mode. And the transverse plate is supported below the rotary swing arm. The device has the advantages of ingenious design, reasonable and compact structure, space saving due to the fact that the dead weight of the lantern ring replaces the original heavy punch structure, safety and reliability due to the fact that the limit switch and the rotary swing arm are combined with the lantern ring to achieve limit sensing; due to the design of the multi-section swing rod, the lantern ring can swing by a certain angle along with the loop chain, and abrasion of the chain is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of chain hoists, in particular to a novel heavy hammer limit protection device for chain hoists. Background Art

[0002] Currently, chain hoists use a weight limit device: a switch is installed on the hoist housing, and a small hammer is suspended at the end of the switch through a wire rope. There is a through hole in the center of the small hammer, and the chain of the chain hoist passes through this small hammer. When the hook at the end of the chain rises to the weight position, it drives the weight to rise, thereby triggering the contacts of the weight switch to achieve the safety protection function.

[0003] shortcoming:

[0004] 1. The hanging hammer takes up a certain amount of space, affecting the hoist's rising limit size;

[0005] 2. The chain of the chain hoist passes through the middle of the hanging hammer, causing certain wear on the chain. Summary of the Invention

[0006] In order to solve the above technical problems, the utility model proposes a novel heavy hammer limit protection device for a chain hoist, which has an ingenious design, a reasonable and compact structure, and is safe and reliable.

[0007] The technical solution of this utility model:

[0008] A new type of heavy hammer limit protection device for a chain hoist includes a mounting plate, a limit switch, a rotating swing arm, a multi-section swing arm, and a collar. The mounting plate is mounted below the main body of the chain hoist. The limit switch is mounted on one side of the mounting plate near the lower end. One end of the rotating swing arm is mounted on the lower end of the mounting plate for vertical rotation and the rotating swing arm is located below the limit switch. The other end of the rotating swing arm is horizontally rotated and connected to one end of the multi-section swing arm. The other end of the multi-section swing arm is connected to one side of the collar. The collar is sleeved on the outside of the ring chain with a hook of the chain hoist. A horizontal plate is mounted on the lower end of the mounting plate, and the horizontal plate is supported below the rotating swing arm.

[0009] The upper end of the rotating swing arm is designed with a bent edge, and the bent edge is located below the contact of the limit switch.

[0010] The multi-section rocker includes a first rocker and a second rocker. One end of the first rocker is horizontally rotatably connected to one end of the rotating rocker arm, the other end of the first rocker is horizontally rotatably connected to one end of the second rocker, and the other end of the second rocker is fixedly connected to one side of the ring.

[0011] The advantages of this utility model are ingenious design, reasonable and compact structure, the weight of the ring replaces the previous heavy hammer structure, saving space, the limit switch and the rotating swing arm are combined with the ring to realize limit sensing, which is safe and reliable; the multi-section swing arm design enables the ring to swing at a certain angle following the ring chain, effectively reducing the wear of the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an application schematic diagram of the utility model.

[0013] Figure 2 It is a schematic diagram of the present utility model.

[0014] Figure 3 It is a bottom view schematic diagram of the present utility model.

[0015] Figure 4 It is a side view of the limit switch of the present utility model. DETAILED DESCRIPTION

[0016] Refer to the attached Figure 1-4 A new type of heavy hammer limit protection device for a chain hoist includes a mounting plate 1, a limit switch 2, a rotating swing arm 3, a multi-section pendulum rod 4, and a collar 5. The mounting plate 1 is installed under the main body of the chain hoist 6, and a limit switch 2 is installed near the lower end of one side of the mounting plate 1. One end of the rotating swing arm 3 is installed on the lower end of the mounting plate 1 for vertical rotation, and the rotating swing arm 3 is located below the limit switch 2. The other end of the rotating swing arm 3 is horizontally rotated and connected to one end of the multi-section pendulum rod 4. The other end of the multi-section pendulum rod 4 is connected to one side of the collar 5. The collar 5 is sleeved on the outside of the ring chain 7 with a hook of the chain hoist 6. A horizontal plate 11 is installed at the lower end of the mounting plate 1, and the horizontal plate 11 is supported below the rotating swing arm 3.

[0017] The upper end of the rotating swing arm 3 is designed with a bent edge 31, and the bent edge 31 is located below the contact of the limit switch 2. The multi-section swing rod is horizontally rotated to connect one end of the bent edge.

[0018] The multi-section swing link 4 includes a first swing link 41 and a second swing link 42. One end of the first swing link 41 is horizontally connected to the bent edge of the rotating swing arm 3. The other end of the first swing link 41 is horizontally connected to one end of the second swing link 42. The other end of the second swing link 42 is fixedly connected to one side of the collar 5. The two swing links cooperate to achieve left-right rotation and telescopic movement in the same plane, meeting the dynamic use requirements of the chain and reducing wear.

[0019] When the utility model is used, the collar is sleeved on the outside of the chain, and the chain passes through the middle of the collar, which reduces friction. One side of the collar is rotatably mounted on the mounting plate through a multi-section swing rod and a rotating swing arm. The lower end of the rotating swing arm is supported by a cross plate, so that the rotating swing arm is in a nearly horizontal state, and the rotating swing arm has to rotate upward. The multi-section swing arm is horizontally rotatable and can only rotate horizontally. In this way, when the chain swings left and right at a certain angle, it can move with the collar, without causing the chain to tilt and forcefully wear the collar. The wear is small, the chain is safe and reliable, and the service life is extended. The two sections of the multi-section swing arm provided by the utility model can rotate horizontally and can be extended to a certain extent to meet the swing requirements of the chain. Once the hook rises to the limit position, it will move upward with the collar, and the multi-section swing arm will also swing upward, leading the rotating swing arm to swing online. The rotating swing arm hits the contact of the limit switch on the bent edge. When the limit switch receives the signal, it stops the upward movement of the electric chain hoist, which is safe and reliable. The sleeve replaces the previous heavy hammer, the structural size becomes smaller, the sleeve can be appropriately enlarged, and the wear of the chain is reduced.

Claims

1. A new type of heavy hammer limit protection device for chain hoist, characterized in that: It includes a mounting plate, a limit switch, a rotating swing arm, a multi-section swing rod, and a collar. The mounting plate is installed under the main body of the chain hoist. A limit switch is installed on one side of the mounting plate near the lower end. One end of the rotating swing arm is mounted on the lower end of the mounting plate for vertical rotation and is located below the limit switch. The other end of the rotating swing arm is horizontally rotated and connected to one end of the multi-section swing rod. The other end of the multi-section swing rod is connected to one side of the collar. The collar is sleeved on the outside of the ring chain with a hook of the chain hoist. A horizontal plate is installed at the lower end of the mounting plate, and the horizontal plate is supported below the rotating swing arm.

2. A new type of heavy hammer limit protection device for chain hoist according to claim 1, characterized in that: The upper end of the rotating swing arm is designed with a bent edge, and the bent edge is located below the contact of the limit switch.

3. A new type of heavy hammer limit protection device for chain hoist according to claim 1, characterized in that: The multi-section rocker includes a first rocker and a second rocker. One end of the first rocker is horizontally rotatably connected to one end of the rotating rocker arm, the other end of the first rocker is horizontally rotatably connected to one end of the second rocker, and the other end of the second rocker is fixedly connected to one side of the ring.

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