CN105067246A - Automatic tension testing device of super-long chain - Google Patents

Abstract

The invention belongs to the testing field of mechanical parts, and specifically discloses an automatic tensile test device for super-long chains, which includes a fixed seat, a tension seat, a pulling device and a control box; the fixed seat includes a base, a first vertical plate, and a first limit seat , the first swinging member and the first actuator, the first limiting seat is fixed on the base, the first vertical plate is fixed on the base or the limiting seat, the first swinging member and the first actuator are connected to the first vertical plate Above, the first swinging member is provided with a first rotating member; the tension seat includes a movable base, a second vertical plate, a second limiting seat, a second swinging member and a second actuator, and the second limiting seat is fixed on the movable On the bottom frame, the second vertical plate is fixed on the movable bottom frame or the second limit seat, the second swinging part and the second actuator are connected to the second vertical plate, and the second swinging part is provided with a second rotating part ; The pulling device is connected to the movable chassis or the second limit seat; the control box is electrically connected to the pulling device, the first actuator and the second actuator respectively.

Description

Ultra-long chain automatic tension test device

technical field

The invention relates to the testing field of mechanical components, in particular to an automatic tension testing device for super-long chains.

Background technique

Chains are generally metal links or rings, which are mostly used for mechanical transmission and traction. According to different purposes and functions, the chain is divided into four types: transmission chain, conveyor chain, traction chain and special special chain.

Traction chains are mainly used for pulling and lifting chains. Traction chains are mainly used in traction elevators. Traction elevator is the most commonly used elevator in vertical transportation. Usually chain manufacturers produce traction chains that are super-long chains, and super-long chains refer to chains with a length of more than 27.5m. When customers use it, they can cut off the super long chain according to their specific needs.

Drag chains usually need to be dipped, which refers to the process of coating the surface of the chain with plastic. The chain after dipping has the advantages of low temperature resistance, impact resistance, wear resistance, salt spray resistance, tensile resistance, acid and alkali resistance, aging resistance, high pressure resistance, chemical resistance, weather resistance, and no cracks when used in the open air.

The dipping process of the traction chain mainly includes: feeding - dipping - cooling - coding - discharging. The performance of the chain needs to be tested before the feeding step. The purpose is to check whether the tensile performance of the chain is qualified, so as to prevent chains with insufficient tensile strength from entering the market after dipping. Since the traction chain is mainly used in the elevator industry, the quality of the chain directly affects the safety of passengers, so the quality of the chain is particularly important. Therefore, it is necessary to perform a tensile test on each link before the traction chain is impregnated.

Usually, when the chain link of the chain is subjected to a tension test, the tension test is not performed on each link individually, but the tension test is performed on a chain of a certain length. For example, a chain tensile parameter testing device with publication number CN103245564A discloses that it includes a workbench, a fixed seat, an adapter, a tension gauge, a dial gauge and an actuating device; the actuating device is used to stretch the chain under test, The adapter ensures that the height of the chain to be tested is on the same level as the active force of the actuating device. The device needs to manually lock and fix the chain every time the pulling force of a section of the chain is tested, which greatly reduces the test efficiency.

To sum up, for chain manufacturers, there is an urgent need for an automatic tension testing device, which can eliminate the need to manually fix the end points of the chain to be tested during the chain tension testing process, which has become an urgent problem to be solved in this industry.

Contents of the invention

The purpose of the present invention is to provide an automatic tension testing device for super-long chains, which does not need to manually fix the end points of the chains to be tested during the tension testing of super-long chains.

To achieve the above object, the technical scheme of the present invention is as follows:

The super-long chain automatic tension test device includes a fixed base, a tension base, a pulling device for moving the tension base, and a control box; An actuator, the first limit seat is fixed on the base, the first vertical plate is fixed on the base or the limit seat, the first swinging member and the first actuator are connected to the first vertical plate, and the first swinging member They are respectively connected to the first actuator and the first vertical plate in rotation, the first swinging member is provided with a first rotating member, and the first rotating member is located above the first limiting seat; the tension seat includes a movable base, a second The vertical plate, the second limit seat, the second swing member and the second actuator, the second limit seat is fixed on the movable chassis, the second vertical plate is fixed on the movable chassis or the second limit seat, and the second Both the oscillating member and the second actuator are connected to the second vertical plate, and the second oscillating member is respectively rotatably connected to the second actuator and the second vertical plate, the second oscillating member is provided with a second rotating member, and the second The rotating part is located above the second limiting seat; the pulling device is connected with the movable chassis or the second limiting seat; the control box is electrically connected with the pulling device, the first actuator and the second actuator respectively.

Using the super-long chain automatic tension testing device of this scheme, the first swinging member is respectively connected to the first actuator and the first vertical plate in rotation, the movement of the first actuator drives the movement of the first swinging member, and the first swinging member surrounds the first A swinging part swings at the connecting point with the first vertical plate. The first swinging member is provided with a first rotating member, and the first rotating member is located above the first position limiting seat. The first rotating member plays a role in supporting the chain. When the chain is pulled, the rotating member rotates to reduce wear on the chain. The first limit seat plays the role of fixing the end of the chain to be tested. When it is necessary to perform tension detection on a certain chain, the movement of the first actuator causes the first rotating member on the first swinging member to move toward the first limit seat, and when the first swinging member moves to the first limit seat, the first A chain link of the chain below the swing member is blocked by the first limit seat, thereby realizing fixing one end of the chain of the test section.

The second oscillating member is respectively rotatably connected with the second actuator and the second vertical plate, the movement of the second actuator drives the movement of the second oscillating member, and the second oscillating member surrounds the connection point between the second oscillating member and the second vertical plate swing. The second swinging member is provided with a second rotating member, and the second rotating member is located above the second limit seat, and the second rotating member plays a role in supporting the chain. When the chain is pulled, the rotating member rotates to reduce wear on the chain. The second limit seat acts as an end point fixer for the chain to be tested. When it is necessary to perform tension detection on a certain chain, the movement of the second actuator causes the second rotating member on the second swinging member to move toward the second limit seat, and when the second swinging member moves to the second limit seat, the second A chain link of the chain below the swing member is blocked by the second limit seat, thereby realizing fixing one end of the test section chain.

The pulling device moves the tension seat so as to realize the tension test of the chain to be tested. The control box is electrically connected with the pulling device, the first actuator and the second actuator respectively. By setting the PLC program on the control box, the movement rhythm of the first actuator, the second actuator and the pulling device can be controlled to realize automatic super-automatic inspection. Long chains are subjected to section-by-section pull tests.

Working principle: When implementing the ultra-long chain tension testing device, first arrange the fixed seat, the tension seat and the pulling device in sequence, and then let the chain pass through the second rotating part and the first rotating part in sequence.

When the chain segment between the first rotating part and the second rotating part needs to be tested for tension, the first actuator is operated through the control box, and the first actuator works to drive the first swinging part to move, so that the first rotating part moves closer to The direction of the first limiting seat moves, and at this time the chain below the first swinging member also approaches the direction of the first limiting seat, when the chain below the first swinging member contacts the limiting seat, and a chain link is restricted When the seat is stuck, the first actuator maintains this working state.

The second actuator works through the control box, and the second actuator works to drive the second swinging member to move, so that the second rotating member moves toward the direction close to the second limit seat. At this time, the chain below the second swinging member also moves toward the first The direction of the two limit seats is close, and when the chain below the second swinging member contacts the limit seat, and a chain link is blocked by the limit seat, the second actuator maintains this working state. At this moment, the two ends of the chain of the section to be tested are respectively fixed by the fixed seat and the tension seat.

The pulling device is operated through the control box, and the pulling device drives the tension seat to move away from the fixed seat, and the chain to be tested is straightened. When the pulling device drives the tension seat to move, if the chain in the test section does not break, it indicates that the tensile strength of the chain in this section is qualified.

When it is necessary to perform a tension test on another chain, the pulling device is operated through the control box, and the pulling device returns the tension seat to its original position, and then the first actuator and the second actuator are operated through the control box, and the first swinging member and the second actuator are operated. The two swinging parts both swing, so that the first rotating part moves away from the first limiting seat, and the second rotating part moves away from the second limiting seat. The chain below the first swing member also moves away from the first limit seat, and at this moment, the chain ring stuck on the first limit seat breaks away from the first limit seat; the chain below the second swing member also moves away from the first limit seat. To move away from the direction of the second limiting seat, the chain link stuck on the second limiting seat is now disengaged from the second limiting seat. The chain is pulled so that the chain segment to be tested for pull force is located between the first rotating member and the second rotating member. By repeating the previous tensile test steps, the segment-by-section tensile test of the ultra-long chain can be realized.

Beneficial effects: during the tension test of the chain, there is no need to manually fix the end point of the chain to be inspected, and the movement tempo between the first actuator, the second actuator and the pulling device can be controlled through the control box. Compared with the need to manually fix the end points of the chain to be tested at present, this device adopts automatic work, which greatly improves the efficiency of the tension test of the chain.

Further, a guide rail is provided between the fixed seat and the tension seat, and a plurality of parallel rollers are arranged on the guide rail. When the chain passes through the second rotating member and arrives between the first rotating member, the chain contacts the rollers. When the roller and the chain are in point contact, compared with the surface contact between the chain and the ground, the wear of the chain is smaller, and the contact between the chain and the ground is avoided, so as to prevent impurities such as mud from adhering to the chain and affecting the effect of subsequent chain dipping .

Further, a guide seat is provided at the end of the guide rail, and the guide seat includes a guide base and a guide block, and the guide block and the guide base are detachably connected. The guide seat can ensure that the chain is always on the straight line formed by the first rotating part and the second rotating part during the chain pulling process. The detachable connection between the guide block and the guide base facilitates the processing of the guide block.

Further, the first limiting seat includes a first limiting plate and a first U-shaped plate, the first limiting plate is detachably connected to the first U-shaped plate, and the first limiting plate is provided with a ring bayonet. The detachable connection between the first limiting plate and the first U-shaped plate facilitates the processing of the bayonet on the first limiting plate, and also utilizes some scattered materials as much as possible. The first limiting plate and the first U-shaped plate form a rectangular frame, so that when the first rotating member moves into the rectangular frame, the chain below the first swinging member contacts the first limiting plate, so that one of the chain links is moved by the first The bayonet on the limit plate is stuck.

Further, the first vertical plate is also provided with a first fixed rotating part and a first auxiliary rotating part, the first fixed rotating part is located above the first rotating part, and the distance from the ground of the first fixed rotating part is greater than that of the first fixed rotating part. The distance from the ground of the auxiliary rotating member. The first fixed rotating part, the first auxiliary rotating part and the first rotating part are combined into a rotating part group, which is beneficial to the stability during the chain pulling process, and makes the chain enter and leave the rotating part group in the same direction .

Further, the second vertical plate is also provided with a second fixed rotating member, a second auxiliary rotating member and a second adjusting rotating member, the second fixed rotating member is located above the second rotating member, and the second fixed rotating member The distance from the ground is greater than that of the second auxiliary rotating member, the second adjusting rotating member is located above the second fixed rotating member, and the second adjusting rotating member can move vertically on the vertical plate. The second fixed rotating part, the second auxiliary rotating part and the second rotating part are combined to form a set of rotating parts, which is beneficial to the stability during the chain pulling process, and makes the chain enter and leave the rotating part group in the same direction . The second adjustment rotating member plays the role of assisting in adjusting the direction of the links on the chain, ensuring that the links passing through the second adjusting rotating member are all arranged in a horizontal direction.

Further, a first guide plate is provided on the first limit seat, and a second guide plate is provided on the second limit seat. When the first rotating part moves with the first swinging part, the first guide plate guides the first swinging part; when the second rotating part moves with the second swinging part, the second guide plate guides the second swinging part Play a guiding role.

Further, the pulling device includes a base plate, a support base, a hydraulic cylinder and an oil tank, the support base is fixed on the base plate, the hydraulic cylinder is fixed on the support base, the oil tank and the hydraulic cylinder are connected through oil pipes; a support frame is also provided on the support base, and the support The frame includes a support rod, the lower end of the support rod is provided with an arc seat, and the upper end is provided with a pulley. The pulley supports the chain entering the tension seat.

Further, it also includes an input roller and an output roller, the input roller, the pulling device, the tension seat, the guide rail, the guide seat and the output roller are arranged in sequence, the first motor is installed on the output roller, and the second motor is installed on the input roller. Both the first motor and the second motor are electrically connected to the control box. Through the control box, the working state of the first motor and the second motor can be used to control the motion state of the input roller and the output roller, so as to meet the needs of the chain tension test.

Further, a first support rod is provided on the first swing member, a second support rod is provided on the second swing member, a support block is provided on the second vertical plate, two guide columns are provided on the support block, and the guide The column is rotatably connected with the support block. The first support rod prevents the chain under the first swinging member from contacting the limit seat when the first rotating part is above the limit seat, and the chain is stuck by the first limit seat; the second support rod prevents the second rotation When the part is above the limit seat, the chain below the second swinging part contacts the second limit seat, and the chain is stuck by the second limit seat. The chain passes between the two guide posts, and the guide port formed by the two guide posts guides and limits the chain entering the tension seat, preventing the chain from sliding down from the tension seat due to the chain swinging left and right.

Description of drawings

Fig. 1 is the structural representation of the embodiment of super-long chain automatic tensile testing device of the present invention;

Fig. 2 is a schematic structural view of the pulling device and the tension seat in Fig. 1;

Fig. 3 is a schematic structural view of the fixing seat in Fig. 1;

Fig. 4 is a schematic structural view of the first position limiting seat in Fig. 3;

Fig. 5 is a schematic structural view of the guide seat in Fig. 1 .

Detailed ways

The present invention will be described in further detail below by means of specific embodiments:

The reference signs in the drawings of the specification include: input roller 1, output roller 2, fixed seat 3, tension seat 4, pulling device 5, guide rail 6, guide seat 7, control box 8, hydraulic station 9, hydraulic cylinder 10, the first One motor 11, the second motor 12, the first vertical plate 13, the first swing lever 14, the first cylinder 15, the first pulley 16, the first fixed pulley 17, the first secondary pulley 18, the second adjustment pulley 19, the first A guide plate 20 , a first limit seat 21 , a first limit plate 22 , a first U-shaped plate 23 , a guide base 24 , a guide block 25 , and a support block 26 .

The embodiment is basically shown in Figure 1: an automatic tensile testing device for super-long chains, including an input roller 1, an output roller 2, a fixed seat 3, a tension seat 4, a pulling device 5, a guide rail 6, a guide seat 7 and a control box 8. The input roller 1, the pulling device 5, the tension seat 4, the guide rail 6, the guide seat 7, the fixed seat 3 and the output roller 2 are arranged side by side in sequence. The guide rail 6 is provided with 10 parallel rollers. The first motor 11 is installed on the output roller 2, the second motor 12 is installed on the input roller 1, the first motor 11, the second motor 12, the pulling device 5, the fixed seat 3, the tension seat 4 are all electrically connected to the control box 8 connect. The pulling device 5 includes a base plate, a support seat, a hydraulic cylinder 10 and a hydraulic station 9 .

As shown in accompanying drawing 2, the tension base 4 includes a movable base, a second vertical plate, a second limit seat, a second swing member and a second actuator, the second limit base is welded on the movable base, and the movable base The bottom of the frame is equipped with rollers. The second vertical plate is welded on the second limit seat, the second swinging member is connected with the second vertical plate through a rotating pin, the second actuator is connected with the second vertical plate by bolts, and the second swinging member is pivotally connected with the second actuator , the left end of the second swinging member is installed with a second rotating member, the second rotating member is located above the second limit seat; the piston rod on the hydraulic cylinder is connected with the second limit seat. The second swing member is provided with a second support rod, and the upper left end on the second vertical plate is also welded with a support block 26. Two guide posts side by side are installed on this support block 26, and the guide post can rotate on the support block 26.

The second vertical plate is also provided with a second fixed rotating part, a second secondary rotating part and a second adjusting rotating part, the second fixed rotating part is located above the second rotating part, and the distance from the ground of the second fixed rotating part is greater than that of the first rotating part. The distance from the ground of the two pairs of rotating parts, the second auxiliary rotating part is located on the right side of the second fixed rotating part, the second adjusting rotating part is located above the second fixed rotating part, and the second adjusting rotating part can be vertically positioned on the vertical plate move. A second guide plate is welded on the second position-limiting seat, and the second guide plate guides the second rotating member during the movement of the second swinging member.

The support base is fixed on the base plate, the hydraulic cylinder is fixed on the support base, the hydraulic station 9 and the hydraulic cylinder 10 are connected through oil pipes; a support frame is also installed on the support base, the support frame includes a support rod, and an arc seat is welded at the lower end of the support rod , a pulley is installed on the upper end.

As shown in the accompanying drawing 3, the fixed base 3 includes a base, a first vertical plate 13, a first limiting seat 21, a first swing member and a first actuator, the first limiting base 21 is welded on the base, and the first vertical The plate 13 is welded on the first limit seat 21, the first swinging member is connected with the first vertical plate 13 by a rotating pin, the first actuator is connected with the first vertical plate 13 by bolts, the first swinging member is connected with the first actuator Pivotally connected, a first rotating member is installed on the right end of the first swinging member, and the first rotating member is located above the first limiting seat 21 . A first support rod is welded on the first swing member, and a first guide plate is installed on the first limit seat 21, and the first guide plate guides the first rotating member during the movement of the first swing member. The first vertical plate 13 is also provided with a first fixed rotating part and a first auxiliary rotating part, the first fixed rotating part is located above the first rotating part, and the distance from the ground of the first fixed rotating part is greater than that of the first auxiliary rotating part The distance from the ground, the first auxiliary rotating member is located on the left side of the first fixed rotating member.

As shown in Figure 4, the first limiting seat 21 includes a first limiting plate 22 and a first U-shaped plate 23, the first limiting plate 22 is bolted to the first U-shaped plate 23, and the first limiting plate 22 Features a bayonet that snaps onto the chainring.

As shown in FIG. 5 , the guide seat 7 includes a guide base 24 and a guide block 25 , and the guide block 25 is connected with the guide base 24 by bolts.

When specifically implementing the ultra-long chain tension testing device, the first swinging member is the first swinging rod 14, the second swinging member is the second swinging rod, and the first swinging rod 14 and the second swinging rod have the same structural size, which is convenient for processing . The first rotating part is the first pulley 16, the second rotating part is the second pulley, the first fixed rotating part is the first fixed pulley 17, the first secondary rotating part is the first secondary pulley 18, and the second fixed rotating part is the first secondary pulley 18. Two fixed pulleys, the second auxiliary rotating part is the second pulley, the second adjusting rotating part is the second adjusting pulley 19, the first actuator is the first cylinder 15, and the second actuator is the second cylinder. The structure of the second limiting seat is the same as that of the first limiting seat 21 .

When using the device of this scheme, first wind the chain to be detected on the input roller 1, and then let the chain pass through the guide column, the second fixed rotating part, the second auxiliary rotating part, the second rotating part, and the first rotating part in sequence 1. The first auxiliary rotating part and the first fixed rotating part; when the chain is pulled, the rotating direction of the second fixed rotating part is opposite to that of the second rotating part; the rotating direction of the first fixed rotating part is opposite to that of the first rotating part.

When the chain segment between the first rotating part and the second rotating part needs to be tested for tension, the first actuator is operated through the control box 8, and the operation of the first actuator drives the first swinging part to move, so that the first rotating part moves toward the Move in the direction close to the first limit seat 21. At this time, the chain below the first swing member also approaches the first limit seat 21. When the chain below the first swing member contacts the limit seat, there is a chain When the ring is blocked by the limit seat, the first actuator maintains this working state.

The second actuator works through the control box 8, and the second actuator works to drive the second swinging member to move, so that the second rotating member moves toward the direction close to the second limit seat. At this time, the chain below the second swinging member also moves toward The direction of the second limiting seat is close, and when the chain below the second swinging member contacts the limiting seat, and a chain link is blocked by the limiting seat, the second actuator maintains this working state. At this moment, the two ends of the chain of the section to be tested are fixed by the fixed seat 3 and the tension seat 4 respectively.

The hydraulic station 9 supplies oil to the hydraulic cylinder through the control box 8, and the piston rod in the hydraulic cylinder drives the tension seat 4 to move away from the fixed seat 3. At this time, the chain of the section to be tested is straightened. During the movement of the tension seat 4 driven by the piston rod, if there is no fracture phenomenon in the test section of the chain, it indicates that the tensile strength of the section of the chain is qualified.

When it is necessary to perform a tension test on another chain, the pulling device 5 is operated through the control box 8, and the pulling device 5 returns the tension seat 4 to its original position, and then the first actuator and the second actuator are operated through the control box 8, the second Both the first swinging member and the second swinging member swing, so that the first rotating member moves away from the first limiting seat 21 , and the second rotating member moves away from the second limiting seat. The chain below the first swing member also moves away from the first limit seat 21. At this time, the chain link stuck on the first limit seat 21 breaks away from the first limit seat 21; The chain also moves away from the second position-limiting seat, and now the chain link stuck on the second position-limiting seat breaks away from the second position-limiting seat. The first motor 11 and the second motor 12 are rotated by the control box 8, so that the input roller 1 and the output roller 2 are rotated, and the chain segment to be subjected to the tension test is located between the first rotating member and the second rotating member. By repeating the previous tensile test steps, the segment-by-section tensile test of the ultra-long chain can be realized.

The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the schemes are not described here too much. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present invention, several modifications and improvements can also be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (10)

1. the automatic device for testing tensile force of overlength chain, the pull unit comprising holder, pulling force seat and pulling force seat is moved, is characterized in that, also comprise control box; Holder comprises base, the first riser, the first limit base, the first swing component and the first executive component, first limit base is fixed on base, first riser is fixed on base or limit base, first swing component and the first executive component are all connected on the first riser, and the first swing component is rotationally connected with the first executive component and the first riser respectively, first swing component is provided with the first tumbler, and the first tumbler is positioned at above the first limit base; Described pulling force seat comprises movable underframe, the second riser, the second limit base, the second swing component and the second executive component, second limit base is fixed on movable underframe, second riser is fixed on movable underframe or the second limit base, second swing component and the second executive component are all connected on the second riser, and the second swing component is rotationally connected with the second executive component and the second riser respectively, second swing component is provided with the second tumbler, and the second tumbler is positioned at above the second limit base; Described pull unit is connected with movable underframe or the second limit base; Described control box is electrically connected with pull unit, the first executive component and the second executive component respectively.

2. the automatic device for testing tensile force of overlength chain according to claim 1, is characterized in that, be provided with guide rail between described holder and pulling force seat, and guide rail is provided with multiple cylinder arranged side by side.

3. the automatic device for testing tensile force of overlength chain according to claim 2, it is characterized in that, the end of described guide rail is provided with guide holder, and this guide holder comprises guide seats and orienting lug, and orienting lug and guide seats removably connect.

4. the automatic device for testing tensile force of overlength chain according to claim 1 or 3, it is characterized in that, described first limit base comprises the first limiting plate and the first U-board, and the first limiting plate and the first U-board removably connect, and the first limiting plate is provided with the bayonet socket that can block chain link.

5. the automatic device for testing tensile force of overlength chain according to claim 4, it is characterized in that, described first riser is also provided with the first fixing tumbler and the first secondary tumbler, first fixing tumbler is positioned at above the first tumbler, and the ground clearance of the first fixing tumbler is greater than the ground clearance of the first secondary tumbler.

6. the automatic device for testing tensile force of overlength chain according to claim 5, it is characterized in that, described second riser is also provided with the second fixing tumbler, the second secondary tumbler and the second regulating rotary moving part, second fixing tumbler is positioned at above the second tumbler, and the ground clearance of the second fixing tumbler is greater than the ground clearance of the second secondary tumbler, second regulating rotary moving part is positioned at above the second fixing tumbler, and the second regulating rotary moving part can vertically movement on riser.

7. the automatic device for testing tensile force of overlength chain according to claim 6, is characterized in that, described first limit base is provided with the first guide plate, and the second limit base is provided with the second guide plate.

8. the automatic device for testing tensile force of overlength chain according to claim 7, it is characterized in that, described pull unit comprises base plate, supporting seat, hydraulic cylinder and fuel tank, supporting seat is fixed on base plate, and hydraulic cylinder is fixed on supporting seat, and fuel tank is connected by oil pipe with hydraulic cylinder; Supporting seat is also provided with bracing frame, and this bracing frame comprises support bar, and support bar lower end is provided with arc-shaped seat, and upper end is provided with pulley.

9. according to the automatic device for testing tensile force of overlength chain described in claims 1 to 3,7 or 8, it is characterized in that, also comprise input roller and outlet roller, input roller, pull unit, pulling force seat, guide rail, guide holder and outlet roller are arranged in order, outlet roller is provided with the first motor, input roller is all provided with the second motor, and the first motor and the second motor are all electrically connected with control box.

10. the automatic device for testing tensile force of overlength chain according to claim 9, it is characterized in that, first swing component is provided with the first support bar, second swing component is provided with the second support bar, second riser is provided with back-up block, this back-up block is provided with two guideposts, and this guidepost and back-up block are rotationally connected.