CN211624112U

CN211624112U - Trolley chain tensioning device

Info

Publication number: CN211624112U
Application number: CN202020222056.2U
Authority: CN
Inventors: 陈增林; 赵巍; 陈革; 陈伟明; 黄文锋
Original assignee: Guangzhou Container Harbor Co ltd; Guangzhou Port Group Co Ltd
Current assignee: Guangzhou Container Harbor Co ltd; Guangzhou Port Group Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-10-02
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses a dolly chain overspeed device tensioner, including screw rod, nut, limiting plate, elastic mechanism and parallel adjustment mechanism, the head of screw rod is fixed in limiting plate one end, and nut screw thread fit in the screw thread portion of screw rod, screw rod activity cross-under are in the equipment girder, and the limiting plate other end is used for connecting the chain, and parallel adjustment mechanism installs in the limiting plate and is used for adjusting the limiting plate to parallel with the equipment girder, and elastic mechanism one end butt is in the equipment girder otic placode, and elastic mechanism other end butt is in the nut for provide tensioning elastic force to the nut. The utility model discloses can constantly automatic adjustment chain rate of tension, make the chain be in the state parallel with the girder all the time simultaneously, improve chain life.

Description

Trolley chain tensioning device

Technical Field

The utility model relates to a monkey, concretely relates to dolly chain overspeed device tensioner.

Background

The trolley driving mode of the container crane is various, such as self-propelled traction type, etc., wherein the traction type uses a chain to pull, the output power of a motor is transmitted to a gear box, and is transmitted to a chain wheel box through the gear box, and a chain wheel in the chain wheel box is meshed with the chain and rotates, so that the trolley is pulled. In the trolley adopting the traction mode, the chain is pulled to stretch for a long time, and the chain is repeatedly collided for a long time in the swinging and rotating processes, so that metal fatigue is easily generated to cause fracture and damage loss. Moreover, the tail end of the chain is fixed on an ear plate of a girder of the equipment by using a screw nut pair, and long-term chain stretching and vibration lead to loosening of the screw nut, so that the chain of the trolley is too loose, and therefore nut fastening and length tensioning adjustment of the chain of the trolley need to be carried out frequently, which wastes time and labor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a trolley chain tensioning device, which can automatically adjust the chain tension degree constantly, and simultaneously, the chain is always in a state parallel to the crossbeam, thereby prolonging the service life of the chain.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a dolly chain overspeed device tensioner, includes screw rod, nut, limiting plate, elastic mechanism and parallel adjustment mechanism, and the head of screw rod is fixed in limiting plate one end, and nut screw thread fit in the screw thread portion of screw rod, the screw rod activity cross-under is in the equipment girder, and the limiting plate other end is used for connecting the chain, and parallel adjustment mechanism installs in the limiting plate and is used for adjusting the limiting plate to parallel with the equipment girder, and elastic mechanism one end is connected in the equipment girder otic placode, and elastic mechanism other end butt is in the nut for provide tensioning elastic force to the nut.

Preferably, the elastic mechanism comprises a bottom sheath, a top sheath and a spring, the spring is sleeved on the screw rod, two ends of the spring are respectively abutted against the bottom sheath and the top sheath, the top sheath is used for being attached to an ear plate of the equipment girder, and the bottom sheath is abutted against the nut.

Preferably, the top and bottom sheaths each have an insertion lumen for inserting the end of the spring.

Preferably, the parallel adjustment mechanism comprises two bolts respectively arranged on two sides of the limiting plate, the bolts are connected to the limiting plate in a penetrating mode, tail portions of the bolts are abutted to the equipment girder, and thread portions of the bolts are in thread fit with the limiting plate.

Preferably, the head of the bolt is a hexagonal head, each symmetrical side part of the hexagonal head is penetrated with a through hole, and a winding wire for fixing the hexagonal head is arranged in the through hole.

Preferably, the limiting plate includes diaphragm and the riser of cross rigid coupling, and riser one end is fixed in the screw head, and the riser other end is used for connecting the chain, two the bolt is located the diaphragm both ends respectively.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a buffer power and tensioning elasticity that elastic mechanism applyed the screw rod, atress between the chain that reducible limiting plate is connected suddenly alleviates chain metal fatigue, reduces the possibility of being broken, prolongs the chain life-span, so, adjusts the installation back (be used for adjusting elasticity, buffer power size) to what of nut screw in screw rod, needn't often adjust the chain and fasten the nut, reduces the human cost, in addition, the utility model discloses a parallel adjustment mechanism makes the limiting plate adjust to be parallel with the equipment girder, effectively prevents that the chain from rotating, avoids rotating certain angle back atress when the chain and leads to reducing the chain life-span.

Drawings

FIG. 1 is a schematic structural view of the chain tensioner of the trolley of the present invention;

FIG. 2 is an exploded view of the chain tensioner of the present invention;

fig. 3 is the schematic diagram of the car chain tensioning device installed on the girder.

In the figure: 1. a screw; 2. a nut; 3. a limiting plate; 31. a transverse plate; 32. a vertical plate; 4. an elastic mechanism; 41. a bottom jacket; 42. a top jacket; 43. a spring; 44. placing into a cavity; 5. a parallel adjustment mechanism; 51. a bolt; 511. a hexagonal head; 512. a through hole; 6. a girder; 7. an ear plate.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, a chain tensioning device for a trolley comprises a screw rod 1, a nut 2, a limiting plate 3, an elastic mechanism 4 and a parallel adjusting mechanism 5, wherein the head of the screw rod 1 is fixed at one end of the limiting plate 3, the nut 2 is in threaded fit with the threaded portion of the screw rod 1, the screw rod 1 is movably connected to an equipment girder 6 in a penetrating manner, the other end of the limiting plate 3 is used for connecting a chain, the parallel adjusting mechanism 5 is installed on the limiting plate 3 and used for adjusting the limiting plate 3 to be parallel to the equipment girder 6, one end of the elastic mechanism 4 is connected to an ear plate 7 of the equipment girder 6, and the other end of the elastic mechanism. Through elastic mechanism 4 to the applied buffer power and the tensioning elasticity of screw rod 1, atress between the chain that reducible limiting plate 3 is connected suddenly alleviates chain metal fatigue, reduces the possibility of being broken, prolongs the chain life-span, so, adjust the installation back (be used for adjusting elasticity, buffer power size) to what of nut 2 screw in screw rod 1, needn't often adjust the chain and fasten nut 2, reduce the human cost, in addition, the utility model discloses a parallel adjustment mechanism 5 makes limiting plate 3 adjust to be parallel with equipment girder 6, effectively prevents the chain rotation, avoids rotating certain angle back atress when the chain and lead to reducing the chain life-span.

The elastic mechanism 4 of the embodiment includes a bottom sheath 41, a top sheath 42 and a spring 43, the spring 43 is sleeved on the screw rod 1, two ends of the spring 43 are respectively abutted against the bottom sheath 41 and the top sheath 42, the top sheath 42 is used for being attached to the ear plate 7 of the equipment girder 6, and the bottom sheath 41 is abutted against the nut 2. In the embodiment, the pair of the spring 43 and the nut 2 of the screw 1 is used, the chain tensioning effect is achieved by utilizing the characteristic that the spring 43 can deform under the action of certain external force and can restore to the original shape after the external force is removed, and meanwhile, when the chain is subjected to stretching force above a certain value, the stretching force is transmitted to the spring 43 through the chain and acts on the spring 43 to cause the spring 43 to deform, so that the stress of the chain can be reduced, and the metal fatigue of the chain is prevented, and even the chain is pulled apart. In order to stabilize the spring force provided by the spring 43, both the top sheath 42 and the bottom sheath 41 have an insertion cavity 44 for inserting the end of the spring 43.

The parallel adjustment mechanism 5 of this embodiment includes two bolts 51 that are located the limiting plate 3 both sides respectively, and bolt 51 cross-under is in limiting plate 3 and the bolt 51 afterbody offsets with equipment girder 6, and the screw portion and the limiting plate 3 screw-thread fit of bolt 51. The parallelism between the limiting plate 3 and the girder 6 is adjusted by rotating and adjusting the two bolts 51. In addition, the angle of the chain can be correspondingly driven to be adjusted through adjustment of the parallelism of the limiting plate 3, so that the chain is parallel to the girder 6, the abrasion of the chain and the chain wheel is reduced, and the service life of the chain is prolonged.

In order to stabilize the adjusted bolt 51 and avoid the displacement, the head of the bolt 51 is a hexagonal head 511, each symmetrical side of the hexagonal head 511 is penetrated with a through hole 512, and the through hole 512 is provided with a winding wire for fixing the hexagonal head 511. The winding wire may be a wire iron to lock the bolt 51. The limiting plate 3 of this example includes the diaphragm 31 and the riser 32 of cross rigid coupling, and riser 32 one end is fixed in the screw 1 head, and the riser 32 other end is used for connecting the chain, two bolt 51 are located diaphragm 31 both ends respectively, so can adjust the depth of parallelism of limiting plate 3 for girder 6 better through the bolt 51 that is located diaphragm 31 both ends.

As shown in fig. 1 and 3, during the installation operation, the limit plate 3 is connected with the chain, the thread part of the screw 1 passes through the lug plate 7 of the girder 6, after the top sheath 42, the spring 43 and the bottom sheath 41 are assembled with each other, the top sheath 42 is attached to the lug plate 7, the nut 2 penetrates through the thread part of the screw 1 and is screwed in, the nut 2 is locked to the chain and the spring 43 is stressed. The tail of the bolt 51 is pushed against the surface of the girder 6, the adjusting bolt 51 is rotated until the surface of the limiting plate 3 is parallel to the girder 6, and finally, an iron wire is used for penetrating through the through hole 512 on the side surface of the hexagonal head 511 to prevent the bolt 51 from loosening.

The embodiments of the present invention are not limited to the above embodiments, and according to the contents of the above embodiments of the present invention, the above preferred embodiments can also make modifications, replacements or combinations in various forms without departing from the basic technical idea of the present invention and without conflict, and the obtained other embodiments all fall within the scope of the present invention.

Claims

1. The utility model provides a dolly chain overspeed device tensioner, a serial communication port, including screw rod, nut, limiting plate, elastic mechanism and parallel adjustment mechanism, the head of screw rod is fixed in limiting plate one end, nut screw thread fit in the screw thread portion of screw rod, the screw rod activity cross-under is in the equipment girder, the limiting plate other end is used for connecting the chain, parallel adjustment mechanism installs in the limiting plate and is used for adjusting the limiting plate to parallel with the equipment girder, elastic mechanism one end butt in the equipment girder otic placode, elastic mechanism other end butt in the nut for provide tensioning elastic force to the nut.

2. The trolley chain tensioning device according to claim 1, wherein the elastic mechanism comprises a bottom sheath, a top sheath and a spring, the spring is sleeved on the screw rod, two ends of the spring are respectively abutted against the bottom sheath and the top sheath, the top sheath is used for being attached to an ear plate of a girder of the equipment, and the bottom sheath is abutted against the nut.

3. The cart chain tensioner of claim 2, wherein the top and bottom sheaths each have an insertion cavity for inserting the end of the spring.

4. The trolley chain tensioning device according to claim 2, wherein the parallel adjustment mechanism comprises two bolts respectively disposed at two sides of the limiting plate, the bolts are inserted through the limiting plate, tail portions of the bolts are abutted against a girder of the equipment, and thread portions of the bolts are in threaded fit with the limiting plate.

5. The cart chain tensioner of claim 4, wherein the head of the bolt is a hex head, each of the symmetrical sides of the hex head having a through hole therethrough, the through holes being configured with a winding wire for securing the hex head.

6. The chain tensioner as claimed in claim 4, wherein the limiting plate comprises a transverse plate and a vertical plate fixedly connected in a crossed manner, one end of the vertical plate is fixed to the head of the screw, the other end of the vertical plate is used for connecting the chain, and the two bolts are respectively located at two ends of the transverse plate.