CN-224226605-U - Tensioning device for forklift mast and forklift mast thereof

CN224226605UCN 224226605 UCN224226605 UCN 224226605UCN-224226605-U

Abstract

The utility model discloses a tensioning device for a forklift mast and the forklift mast thereof, which are used for tensioning a front cylinder chain of the forklift mast, and comprise a front cylinder link plate, a sleeve assembly and a tension device, wherein the front cylinder link plate is arranged on the forklift mast and is provided with holes penetrating through the upper end face and the lower end face, and the end face of the front cylinder link plate far away from the front cylinder chain is provided with the sleeve assembly; the pressure plate assembly is kept in contact with the sleeve assembly through a first fastener arranged on the pull rod assembly, and a limiting block which is in sliding connection with the pull rod assembly is arranged in the sleeve assembly. The utility model has simple structure, realizes effective tensioning control of the front cylinder chain on the premise of not changing the original portal structure by additionally arranging the tensioning device, is suitable for the transformation of the existing equipment and the development of new products, and obviously reduces the transformation cost and the assembly complexity.

Inventors

SHI DARONG
CHEN KAI
BAI DEGUI
SHI LEI
WANG DONGYAN
PU JINGJUN

Assignees

安徽合力股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250529

Claims (9)

1. A tensioning device for a forklift mast for tensioning a front cylinder chain of the forklift mast, comprising: The front cylinder chain hanging plate is arranged on the forklift gantry and is provided with a hole penetrating through the upper end face and the lower end face, and a sleeve assembly is arranged on the end face, far away from the front cylinder chain, of the front cylinder chain hanging plate; A joint with one end connected with the front cylinder chain, the other end of the joint is penetrated into the sleeve assembly by a hole and connected with the pull rod assembly, and Through setting up the first fastener on the pull rod assembly, make clamp plate assembly and sleeve pipe assembly keep contact, be equipped with in the sleeve pipe assembly with pull rod assembly sliding connection's stopper, be equipped with the second fastener that is located between preceding jar link plate and the stopper on the joint, the outer peripheral face of pull rod assembly is equipped with both ends respectively with stopper and clamp plate assembly inner wall keep the elastic component of contact, when preceding jar chain is in unusual operating condition, the pressure of storing is released to the elastic component, promotes the clamp plate assembly to move to the direction of keeping away from the sleeve pipe assembly, and the removal of clamp plate assembly passes through pull rod assembly and joint transmission effort to taut preceding jar chain makes it maintain the state of tightening.
2. A tensioning device for a forklift mast according to claim 1, wherein the end of the joint is inserted into the interior of the drawbar assembly and is threadedly connected thereto.
3. A tensioning device for a forklift mast according to claim 2, wherein the outer peripheral surface of the drawbar assembly is provided with cotter pins whose ends are inserted into the joints.
4. A forklift mast comprising the tensioning device according to claim 1, further comprising an outer mast connected to the vehicle body, a middle mast provided on the outer mast, and an inner mast provided on the middle mast, a fork carriage provided on the inner mast, and a fork mounted on the fork carriage.
5. The forklift mast of claim 4, wherein roller sets are provided on said outer mast, said middle mast and said inner mast, respectively, said roller sets comprising main rollers and side rollers, said main rollers and side rollers being disposed between said outer mast and said middle mast, between said middle mast and said inner mast, and between said inner mast and said fork carriage.
6. The forklift mast of claim 4, wherein a front lifting cylinder is mounted on a lower cross beam of the inner mast, the front lifting cylinder being connected to a front cylinder link plate, the front cylinder link plate being connected to a middle cross beam of the inner mast by a third fastener.
7. The forklift mast of claim 6, wherein a front sprocket is mounted at a cylinder head end of the front lifting cylinder, a front cylinder chain is provided on an outer circumferential surface of the front sprocket, one end of the front cylinder chain is connected to the joint, and the other end of the front cylinder chain is connected to a chain seat of the fork frame after bypassing the front sprocket.
8. The forklift mast of claim 7, wherein the front sprocket is provided with a limiting plate for preventing the front cylinder chain from being disengaged from the front sprocket.
9. The forklift mast of claim 4, wherein two rear lifting cylinders are arranged on the outer mast, the telescopic ends of the rear lifting cylinders are connected with the middle mast, a rear chain wheel is arranged on an upper cross beam of the middle mast, a rear cylinder chain is arranged on the outer peripheral surface of the rear chain wheel, one end of the rear cylinder chain is connected with the inner mast, and the other end of the rear cylinder chain bypasses the rear chain wheel to be connected with the outer mast.

Description

Tensioning device for forklift mast and forklift mast thereof Technical Field The utility model relates to the technical field of forklift mast, in particular to a tensioning device for a forklift mast and the forklift mast thereof. Background Fork truck is as the important component part of commodity circulation handling equipment, and the portal system in its working arrangement is the core component that realizes goods transport, stack and loading and unloading function. The portal frame generally comprises an outer portal frame, a middle portal frame and an inner portal frame, and the lifting movement of the fork in the vertical direction is realized by driving a lifting oil cylinder and a chain mechanism through a hydraulic system. At present, the full-free portal structure is widely applied to forklift design, and realizes the step-by-step lifting of the portal by a two-stage lifting mode of a front lifting oil cylinder and a rear lifting oil cylinder and matching with a chain transmission mechanism. Specifically, in the cargo lifting process, the front lifting oil cylinder firstly acts to drive the fork frame and the fork to lift, and after the stroke of the front lifting oil cylinder is completed, the rear lifting oil cylinder continues to act to drive the inner portal to lift, so that the maximum lifting height is realized. However, under certain specific working conditions, for example, when a forklift is used for high-level unloading and stacking bagged materials, an operator often adopts a mode that a fork slides out along the top of the goods to perform fork withdrawal operation, so as to avoid tipping caused by scraping the goods by the fork. During this operation, the forks and the fork carriage are always vertically supported by the load, resulting in the mast chain being in a relaxed state. When the fork is completely separated from the goods, the fork frame and the chain generate free falling motion under the action of gravity until the chain is re-tensioned. The process is easy to cause severe vibration of the chain, and in the vibration process, a chain plate of the chain possibly impacts a piston rod of the front lifting oil cylinder, so that the surface of the piston rod is damaged. With the increase of the operation frequency of the forklift, the damaged piston rod can further damage the oil cylinder sealing system, oil leakage of the oil cylinder is finally caused, and the normal operation and the service life of the forklift are affected. Disclosure of utility model The utility model aims to provide a tensioning device for a forklift mast and the forklift mast thereof, so as to solve the problems in the background art. In order to achieve the purpose, the utility model provides the technical scheme that the tensioning device for the forklift mast is used for tensioning a front cylinder chain of the forklift mast and comprises the following components: The front cylinder chain hanging plate is arranged on the forklift gantry and is provided with a hole penetrating through the upper end face and the lower end face, and a sleeve assembly is arranged on the end face, far away from the front cylinder chain, of the front cylinder chain hanging plate; A joint with one end connected with the front cylinder chain, the other end of the joint is penetrated into the sleeve assembly by a hole and connected with the pull rod assembly, and Through setting up the first fastener on the pull rod assembly, make clamp plate assembly and sleeve pipe assembly keep contact, be equipped with in the sleeve pipe assembly with pull rod assembly sliding connection's stopper, be equipped with the second fastener that is located between preceding jar link plate and the stopper on the joint, the outer peripheral face of pull rod assembly is equipped with both ends respectively with stopper and clamp plate assembly inner wall keep the elastic component of contact, when preceding jar chain is in unusual operating condition, the pressure of storing is released to the elastic component, promotes the clamp plate assembly to move to the direction of keeping away from the sleeve pipe assembly, and the removal of clamp plate assembly passes through pull rod assembly and joint transmission effort to taut preceding jar chain makes it maintain the state of tightening. As a further aspect of the utility model, the end of the connector is inserted into the interior of the pull rod assembly and threadably connected thereto. As a further scheme of the utility model, the outer peripheral surface of the pull rod assembly is provided with a cotter pin with an end inserted into the joint. The utility model provides a fork truck portal, includes overspeed device tensioner, further include with car connection's outer portal, set up the well portal on outer portal and set up the interior portal on well portal, be provided with the fork frame on the interior portal, install the fork on the fork frame. As a further scheme of the utility