CN111408682B

CN111408682B - Chain prestretches device

Info

Publication number: CN111408682B
Application number: CN202010214405.0A
Authority: CN
Inventors: 曹永年; 黄奕; 张仲发; 刘营; 郑金波; 陈豪; 蒲含波
Original assignee: Jiangshan Yongli Lily Industrial Co ltd
Current assignee: Jiangshan Yongli Lily Industrial Co ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2021-09-28
Anticipated expiration: 2040-03-24
Also published as: CN111408682A

Abstract

The invention discloses a chain pre-tensioning device, which comprises a base, wherein a first chain wheel and a sliding seat which is connected with a telescopic device and can move relative to the first chain wheel under the driving of the telescopic device are arranged on the base; an auxiliary wheel which plays a guiding role for the chain is arranged on one side of the first chain wheel. According to the chain stretching device, the stretching distance of the chain can be limited through the stretching distance limiter, so that the chain can be located in a safe stretching distance, and the chain is prevented from being scrapped due to breakage of the chain.

Description

Chain prestretches device

Technical Field

The invention relates to the technical field of chain production, in particular to a chain pre-tensioning device.

Background

A chain is a common driving part in mechanical equipment. The pretensioning process is an indispensable link in the production process of the chain, wherein the pretensioning process specifically refers to the saturated loading of the chain during the running process of the chain so as to discharge the residual scraps in the chain, determine the length of the chain and the like. The pre-tensioning process of the chain is accomplished by a chain pre-tensioning device. The existing chain pre-tensioning device generally comprises a base, a first chain wheel and a second chain wheel, wherein one chain wheel is connected with a hydraulic cylinder, when the chain pre-tensioning device is used, the chain is respectively meshed with the two chain wheels, and the distance between the two chain wheels is changed through the hydraulic cylinder, so that the chain is stretched. In the actual use process, because reasons such as improper operation or control mistake, cause the tensile distance overlength of chain easily, surpassed the tensile load that the chain can bear, lead to the chain to break, make the chain scrap.

Disclosure of Invention

The invention aims to solve the problems that the chain is broken and scrapped due to the fact that the chain stretching distance is too long and exceeds the tensile load which can be borne by the chain easily generated in the using process of the conventional chain pre-stretching device, and the chain pre-stretching device can effectively solve the problems.

The purpose of the invention is realized by the following technical scheme: a chain pre-tensioning device comprises a base, wherein a first chain wheel and a sliding seat which is connected with a telescopic device and can move relative to the first chain wheel under the driving of the telescopic device are arranged on the base; an auxiliary wheel which plays a guiding role for the chain is arranged on one side of the first chain wheel.

When the chain stretching device is used, the chain respectively passes through the first chain wheel and the second chain wheel, the sliding seat is driven to move through the telescopic device, and then the distance between the first chain wheel and the second chain wheel is changed, so that the chain is stretched. The stretching distance limiter can limit the stretching distance of the chain, so that the chain can be located in the safe stretching distance, and the chain is prevented from being broken and scrapped. The auxiliary wheel sets up in one side of first sprocket, plays the guide effect to the chain, increases the meshing length of chain and first sprocket, avoids taking place to break away from between chain and the first sprocket.

Preferably, the telescopic device is a hydraulic cylinder.

Preferably, the base is provided with a guide rail, and the sliding seat is connected to the guide rail in a sliding manner.

Preferably, the first chain wheel is connected with a motor. The motor can drive the first chain wheel to rotate, so that after one section of chain wheel is stretched, the first chain wheel is driven by the motor to rotate to enable the chain to move for a distance, and the next section of chain is stretched.

Preferably, the stretching distance limiter comprises an outer cylinder, a deflection body and a butt joint rod, wherein the outer cylinder is fixed on the base, a cylindrical cavity is arranged in the outer cylinder, a first guide hole and a second guide hole are respectively formed in two ends of the outer cylinder, and a chute is formed in the side wall of the cylindrical cavity; the deflection body is arranged in the cylindrical cavity, a convex shaft is arranged on the side face of the deflection body and is connected in the chute in a sliding mode, a cavity is formed in the deflection body, a lock hole is formed in one end of the deflection body, a connecting rod is arranged at one end, away from the lock hole, of the deflection body, and the connecting rod penetrates through the second guide hole and is connected with the telescopic device; the butt joint rod comprises a rod body and a locking block matched with the lock hole in shape, the locking block is located in the cavity, and the rod body penetrates through the first guide hole and is connected with the sliding seat. When stretching the chain, the telescoping device passes through the connecting rod and drives the deflection body and remove, the deflection body drives the butt joint pole and removes, the butt joint pole drives sliding seat and second sprocket synchronous motion, cooperation through protruding axle and chute, make the deflection body at the removal in-process, can be rotatory around self axis, after deflection body displacement reaches the tensile extreme distance of chain, the lockhole on the deflection body just rotates and coincides as to the lockhole, the locking piece just passes from the lockhole, make butt joint pole and deflection body break away from, thereby prevent the chain to continue to stretch, avoid the chain to stretch apart from the overlength and break up absolutely.

Preferably, a rotary connector is provided between the connecting rod and the telescopic device.

Preferably, the rod body and the first guide hole are rectangular in cross section.

Preferably, a buffer pad is disposed at one end of the circumferential cavity near the first guide hole. The buffer pad plays a role in buffering and reduces the impact between the deflection body and the outer barrel.

The invention has the beneficial effects that: according to the chain stretching device, the stretching distance of the chain can be limited through the stretching distance limiter, so that the chain can be located in a safe stretching distance, and the chain is prevented from being scrapped due to breakage of the chain.

Drawings

FIG. 1 is a top view of the present invention.

Fig. 2 is a sectional view of the stretching distance limiter.

FIG. 3 is a side view of the deflection body.

Fig. 4 is a schematic structural diagram of the docking rod.

Fig. 5 is a sectional view of the outer cylinder.

In the figure: 1. base, 2, sliding seat, 3, the guide rail, 4, second sprocket, 5, first sprocket, 6, auxiliary wheel, 7, chain, 8, pneumatic cylinder, 9, tensile distance limiter, 10, urceolus, 11, cylinder chamber, 12, chute, 13, deflection body, 14, protruding axle, 15, cavity, 16, connecting rod, 17, rotation connector, 19, butt joint pole, 20, blotter, 21, lockhole, 22, the body of rod, 23, locking piece, 24, first guiding hole, 25, second guiding hole.

Detailed Description

The invention is further described by the following detailed description in conjunction with the accompanying drawings.

Example 1:

as shown in fig. 1 to 5, a chain pretensioning device comprises a base 1, a first chain wheel 5, a second chain wheel 4, a sliding seat 2 and a telescoping device. First sprocket 5 sets up on base 1, and first sprocket 5 connects the motor, and first sprocket 5 rotates under the drive of motor. An auxiliary wheel 6 for guiding the chain 7 is arranged on one side of the first chain wheel 5. The auxiliary wheel 6 plays a guiding role for the chain, the meshing length of the chain and the first chain wheel is increased, and the chain is prevented from being separated from the first chain wheel. The base is provided with a guide rail 3, and the sliding seat 2 is connected on the guide rail 3 in a sliding manner. The telescoping device is a hydraulic cylinder 5. The piston rod of the hydraulic cylinder 5 is connected with the sliding seat 2. The sliding seat 2 slides along the guide rail under the driving of the hydraulic cylinder 5. The sliding seat 2 is provided with a rotatable second chain wheel 4. A stretching distance limiter 9 is arranged between a piston rod of the hydraulic cylinder and the sliding seat.

The stretching distance limiter 9 comprises an outer cylinder 10, a deflector 13, and a butt lever 19. The outer cylinder 10 is fixed to the base 1. A cylindrical cavity 11 is arranged in the outer cylinder 10. Both ends of the outer cylinder 10 are provided with a first guide hole 24 and a second guide hole 25, respectively. The first guide hole 24 has a rectangular cross section, and the second guide hole 25 has a circular cross section. The side wall of the cylindrical cavity 11 is provided with a chute 12. A deflector 13 is arranged within the cylindrical cavity 11. The deflector 13 is cylindrical in shape. The side of the deflector 13 is provided with a protruding shaft 14, and the protruding shaft 14 is slidably connected in the chute 12. A cavity 15 is arranged in the deflection body 13, one end of the deflection body 13 is provided with a lock hole 21, and the lock hole 21 is in a diamond shape. The end of the deflector 13 remote from the locking hole 21 is provided with a connecting rod 16, through which the connecting rod 13 passes through the second guiding hole 25. The end of the connecting rod 13 remote from the deflector 13 is connected to the piston rod of the hydraulic cylinder 8. A rotary connector 17 is provided between the connecting rod 13 and the piston rod of the hydraulic cylinder. The swivel connector 17 is prior art. The rotary connector 17 enables relative rotation between the connecting rod 16 and the piston rod of the hydraulic cylinder 8. The butt joint rod 19 comprises a rod body 22 and a locking block 23 matched with the shape of the locking hole 21. The locking piece 23 is located in the cavity 15. The rod body 22 has a rectangular cross section and passes through the first guide hole 24 and is connected to the sliding seat 2. The circumferential chamber 11 is provided with a cushion pad 20 at an end thereof adjacent to the first guide hole 24. The cushion pad 20 is made of rubber. When stretching the chain, the telescoping device passes through the connecting rod and drives the deflection body and remove, the deflection body drives the butt joint pole and removes, the butt joint pole drives sliding seat and second sprocket synchronous motion, cooperation through protruding axle and chute, make the deflection body at the removal in-process, can be rotatory around self axis, after deflection body displacement reaches the tensile extreme distance of chain, the lockhole on the deflection body just rotates and coincides as to the lockhole, the locking piece just passes from the lockhole, make butt joint pole and deflection body break away from, thereby prevent the chain to continue to stretch, avoid the chain to stretch apart from the overlength and break up absolutely.

When the chain stretching device is used, the chain respectively passes through the first chain wheel and the second chain wheel, the sliding seat is driven to move through the telescopic device, and then the distance between the first chain wheel and the second chain wheel is changed, so that the chain is stretched. The stretching distance limiter can limit the stretching distance of the chain, so that the chain can be located in the safe stretching distance, and the chain is prevented from being broken and scrapped.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a chain prestretches device, includes the base, is provided with first sprocket on the base, links to each other with the telescoping device and can with the sliding seat of first sprocket relative movement under the drive of telescoping device, be provided with second sprocket on the sliding seat, its characterized in that: a stretching distance limiter is arranged between the telescopic device and the sliding seat; an auxiliary wheel which plays a role in guiding the chain is arranged on one side of the first chain wheel; the stretching distance limiter comprises an outer barrel, a deflection body and a butt joint rod, wherein the outer barrel is fixed on the base, a cylindrical cavity is arranged in the outer barrel, a first guide hole and a second guide hole are respectively formed in two ends of the outer barrel, and a chute is formed in the side wall of the cylindrical cavity; the deflection body is arranged in the cylindrical cavity, a convex shaft is arranged on the side face of the deflection body and is connected in the chute in a sliding mode, a cavity is formed in the deflection body, a lock hole is formed in one end of the deflection body, a connecting rod is arranged at one end, away from the lock hole, of the deflection body, and the connecting rod penetrates through the second guide hole and is connected with the telescopic device; the butt joint rod comprises a rod body and a locking block matched with the lock hole in shape, the locking block is located in the cavity, and the rod body penetrates through the first guide hole and is connected with the sliding seat.

2. A chain pretensioning device according to claim 1, characterized in that the telescopic means are hydraulic cylinders.

3. A chain pretensioning device according to claim 1, characterized in that the base is provided with guide rails, to which the slide shoe is slidably connected.

4. A chain pretensioning apparatus according to claim 1, characterized in that the first chain wheel is connected to an electric motor.

5. A chain pretensioning device according to claim 1, characterized in that a rotary coupling is provided between the connecting rod and the telescopic means.

6. A chain pretensioning device according to claim 1, characterized in that the rod body and the first guide hole are rectangular in cross-section.

7. A chain pretensioning apparatus according to claim 1, characterized in that a cushion is provided at the end of the circumferential cavity near the first guiding hole.