Linking chain and its matching structure with chain guide frame

Abstract

This invention discloses a chain guide for a chain hoist, which is integrally composed of a flexible base bar, rigid guide protrusions, and rigid slip rings. The guide protrusions are evenly spaced and formed on the surface of the base bar, and the slip rings are formed on each guide protrusion and are perpendicular to each other. The tail slip ring located at the bottom end of the base bar is used to connect with the lifting chain. A matching structure between the chain guide and a guide frame with a lifting sprocket is also provided. The guide frame is an integral structure with an upper cavity and a lower part having a guide frame inlet hole and a guide frame outlet hole communicating with the cavity. An arc-shaped groove is arranged around the guide frame inlet hole, the guide frame outlet hole, and the cavity. The lifting sprocket is located within the cavity. The slip rings slide in and out of the guide frame inlet hole and the guide frame outlet hole, respectively, and the guide protrusions slide in and out of the arc-shaped groove. The slip rings adaptively engage with the chain groove of the lifting sprocket, and the base bar adaptively adapts to the chain ring groove of the lifting sprocket. This fulfills the requirement of guiding the assembly of the lifting chain.

Description

[Technical Field]

[0001] This invention belongs to the technical field of chain hoists, specifically relating to a chain guide for a chain hoist and its matching structure with a chain guide frame with a lifting sprocket. [Background Technology]

[0002] In the process of assembling or frequently changing the lifting chain of an existing chain hoist, before the detachable guide chain frame is assembled and fixed, it is necessary not only to put in the lifting sprocket, but also to pre-cut and pre-install a small section of the chain guide chain from the lifting chain to guide the assembly of the lifting chain.

[0003] In detail, the length of the chain guide must be sufficient to engage with the lifting sprocket, and both ends of the chain guide must protrude from the inlet and outlet holes of the guide frame. The guide frame can only be fixed after the preparation work is completed. Finally, the chain guide end protruding from the inlet hole of the guide frame is connected to the lifting chain. Under the rotation of the lifting sprocket, the lifting chain is guided into the guide frame by the chain guide and engages with the lifting sprocket. Only then is the assembly of the lifting chain completed.

[0004] A careful analysis of the above process reveals the following technical shortcomings:

[0005] 1. Before assembling or repairing / replacing a crane chain, it is necessary to cut the chain guide and pre-install the chain guide. This process is inconvenient and inefficient, and it is wasteful to discard small sections of the chain after use.

[0006] 2. During frequent testing, each replacement of the lifting chain sample requires prior preparation of cutting and pre-installing the chain guide, which is time-consuming and labor-intensive. [Summary of the Invention]

[0007] The purpose of this invention is to provide a chain guide for a chain hoist and its matching structure with a chain guide frame with a lifting sprocket, so as to overcome the shortcomings of the prior art.

[0008] Therefore, as one aspect of the present invention, a chain guide for a chain hoist is provided for guiding the lifting chain to be assembled into the chain hoist. The improvement is that it is integrally composed of a flexible base bar, rigid guide protrusions, and rigid slip rings. The guide protrusions are evenly spaced and formed on the surface of the base bar. The slip rings are formed on each guide protrusion and are perpendicular to each other. Among the slip rings, the tail slip ring located at the bottom end of the base bar is used for connection with the lifting chain.

[0009] The aforementioned tail slip ring has a hanging opening.

[0010] The slip rings other than the aforementioned tail slip ring are either closed slip rings, open slip rings, or a portion of open slip rings with the remaining portion being closed slip rings.

[0011] The present invention also provides a matching structure for the lead chain of a chain hoist and a guide chain frame with a lifting sprocket, including the lead chain of the chain hoist described above.

[0012] The aforementioned chain guide frame is an integral structure, with a cavity at its upper part and a chain guide frame inlet hole and chain guide frame outlet hole connecting the cavity at its lower part. Arc-shaped grooves are arranged around the cavity, the inlet hole, and the outlet hole. The lifting sprocket is located within the cavity. Slip rings are slidably engaged with the inlet and outlet holes, respectively, and the guide protrusions are slidably engaged with the arc-shaped grooves. Each slip ring in the chain adaptively and sequentially engages with the chain socket of the lifting sprocket, and the base strip adaptively matches the chain link groove of the lifting sprocket.

[0013] The advantages and beneficial effects of this invention are as follows:

[0014] Because this chain puller is a single, flexible, and deformable integral structure, and because the spacing between adjacent slip rings remains relatively constant regardless of whether it is in a free state or throughout the entire chain puller operation, it overcomes the shortcomings of chain pullers cut from lifting chain links where the interlocking chain links have inconsistent pitch variations. Each slip ring of this chain puller can smoothly and efficiently slide into and out of the guide frame's inlet and outlet holes. Each guide protrusion can smoothly and efficiently slide along the arc-shaped groove of the guide frame. Each slip ring can adaptively engage with the chain socket of the lifting sprocket, and the base bar can adaptively and axially position itself in the chain link groove of the lifting sprocket without shifting. Therefore, it perfectly fulfills the need for the chain hoist to guide the assembly of the lifting chain link in a "needle-thread" manner.

[0015] The sliding fit between the lead chain and the guide chain frame, as well as its meshing with the lifting sprocket, ensures that the guide chain frame, even after being fitted with the lifting sprocket, does not hinder the easy and quick insertion of the lead chain. Under the rotation of the lifting sprocket, the lead chain can smoothly and efficiently pull the lifting chain into and out of the guide chain frame's inlet and outlet holes. Each slip ring achieves engagement and disengagement with the chain socket, thus efficiently fulfilling the requirement of winding the lifting chain onto the lifting sprocket during new installations and frequent replacement tests. This eliminates the many technical shortcomings of existing technologies that require cutting and pre-installing the lead chain on the lifting chain before assembly.

[0016] An unexpected advantage is that it creates the objective technical conditions for realizing a single-piece integrated chain guide frame, eliminating the need for conventional split-type chain guide frames and their associated technical shortcomings. The weakest point of the existing split-type chain guide frames is at the joint, which is the source of premature breakage. Under lifting load conditions, when the lifting chain and the lifting sprocket do not mesh properly, chain climbing occurs. After chain climbing, it causes strong compression and friction against the inner wall of the chain guide frame, and the lifting chain completely disengages from the lifting sprocket, ultimately causing the lifting chain to slip and the suspended load to fall rapidly. [Attached Image Description]

[0017] Figure 1 This is a perspective view of the chain guide of the chain hoist of the present invention;

[0018] Figure 2 This is a bottom view of the chain guide frame;

[0019] Figure 3 It is a 3D diagram of a crane sprocket;

[0020] Figure 4 This is a schematic diagram (longitudinal half-section) of the cooperation structure between the lead chain and the guide chain frame with lifting sprockets;

[0021] Figure 5 yes Figure 4 The right view.

Detailed Implementation Methods

[0022] Please refer to Figures 1-5 As shown, one aspect of the present invention provides a guide chain for a chain hoist, implemented for guiding the lifting chain 4 to be assembled into the chain hoist. The guide chain is integrally composed of a flexible base bar 1, rigid (hard) guide protrusions 12 and rigid (hard) slip rings. The guide protrusions 12 are uniformly spaced and formed on the surface of the base bar 1. The slip rings are formed on each guide protrusion 12 and are perpendicular to each other. In this embodiment, the slip rings are formed at the root of each guide protrusion 12 and surround the guide protrusions 12. The tail slip ring 11e located at the bottom end of the base bar 1 is used to connect with the lifting chain 4.

[0023] The material for the lead chain is plastic, such as PA66.

[0024] In a preferred embodiment, the tail slip ring 11e has a hook opening 11e-1, or a hook opening (not shown) may be made on a link of the lifting chain 4.

[0025] Preferably, the slip rings other than the tail slip ring are either closed slip rings, open slip rings, or a portion of the slip rings are open slip rings while the remaining portion are closed slip rings.

[0026] As shown in the attached figures of this embodiment, in the slip rings of the chain, the head slip ring 11t is a closed slip ring, the tail slip ring 11e is a slip ring with a hanging opening, and the three slip rings 11 in between are all open slip rings.

[0027] The present invention also provides a matching structure for the lead chain of a chain hoist and a guide chain frame with a lifting sprocket, including the lead chain of the chain hoist described above.

[0028] Preferredly, the chain guide frame 2 is an integral structure with a cavity 20 on its upper part and a chain guide frame inlet hole 21U and a chain guide frame outlet hole 21D communicating with the cavity 20 on its lower part. A chain guide frame arc-shaped groove 22 is arranged around the cavity 20, the chain guide frame inlet hole 21U, and the chain guide frame outlet hole 21D. The lifting sprocket 3 is located in the cavity 20. The slip ring is slidably engaged with the chain guide frame inlet hole 21U and the chain guide frame outlet hole 21D respectively. The guide protrusion 12 is slidably engaged with the chain guide frame arc-shaped groove 22. Each slip ring in the chain adaptively engages and winds around the chain groove 31 of the lifting sprocket 3 and then disengages. The base bar 1 adaptively matches the chain ring groove 32 of the lifting sprocket 3.

[0029] The diagram shows the direction of movement after the insertion of the lead chain.

Claims

1. A chain guide for a chain hoist, used to guide the lifting chain assembly onto the chain hoist, characterized in that: It is integrally composed of a flexible base bar, rigid guide protrusions, and rigid slip rings. The guide protrusions are evenly spaced and formed on the surface of the base bar. The slip rings are formed on each guide protrusion and are perpendicular to each other. The tail slip ring located at the bottom end of the base bar is used to connect with the lifting chain. The slip rings are slidably engaged with the chain inlet hole and chain outlet hole of the chain guide frame, respectively. The guide protrusions are slidably engaged with the arc-shaped groove of the chain guide frame. Each slip ring in the chain adaptively and sequentially engages with the chain socket of the lifting sprocket, and the base bar adaptively matches the chain link groove of the lifting sprocket.

2. The chain guide of the chain hoist according to claim 1, characterized in that: The tail slip ring has a hanging opening.

3. The chain guide of the chain hoist according to claim 1, characterized in that: The slip rings other than the tail slip ring are either closed slip rings, open slip rings, or a portion of them are open slip rings while the remaining portion are closed slip rings.

4. A matching structure between the lead chain of a chain hoist and a guide frame with a lifting sprocket, characterized in that: The chain includes the lead chain of the chain hoist as described in any one of claims 1 to 3.

5. The matching structure of the chain guide and the chain guide frame with lifting sprocket of the chain hoist according to claim 4, characterized in that: The chain guide frame is an integral structure with a cavity at its upper part and a chain guide frame inlet hole and chain guide frame outlet hole at its lower part that connect to the cavity. Arc-shaped grooves of the chain guide frame are arranged around the cavity, the chain guide frame inlet hole, and the chain guide frame outlet hole. The lifting sprocket is located inside the cavity.

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