CN215706357U - Chain link and chain are restoreed fast to length adjustable for railway freight car - Google Patents

Abstract

The utility model discloses a length-adjustable quick repair chain ring and chain for a railway wagon, which comprises: the chain link, the chain link includes connecting portion and two cooperation portions, connecting portion are convex, two cooperation portions set up the both ends at connecting portion respectively, connecting portion and two cooperation portions constitute U type structure, the adjustment seat, the both ends of adjustment seat are provided with the through-hole, can dismantle to wear to establish in the through-hole for two cooperation portions, one side that the middle part of adjustment seat is close to connecting portion is provided with the circular arc recess, the device has innovated quick repair chain link length adjustable technique, perfect quick repair chain link technique and function, hand brake chain repair efficiency and quality have been improved, and can carry out length adjustment, moreover, the steam generator is simple in structure, the adjustment precision is high, and is swift, the operation is thus simple, can dismantle and reuse, portable and operation, especially field work is fit for multiple occasion operation, it is efficient to restore the chain, good economy, guarantee the quality.

Description

Chain link and chain are restoreed fast to length adjustable for railway freight car

Technical Field

The utility model belongs to the technical field of railway wagons, and particularly relates to a quick repair chain ring and chain with adjustable length for a railway wagon.

Background

The hand brake for railway wagon is set for preventing the wagon from slipping when the wagon is parked in station. The hand braking chain is applied to the hand braking device and plays a role in transmitting hand braking force, the phenomenon that the hand braking chain ring is broken is often found in vehicle application, and after the chain ring is broken, the hand braking chain at the broken part sags and invades into a lower limit of the vehicle, so that adverse effects are caused on the driving safety of the vehicle. In the existing action mode (as shown in fig. 1) of the hand brake device of the main type truck, a hand brake 1 'is connected to a truck body 3' through an accessory, meanwhile, a chain 7 'on the hand brake 1' is connected with a truck body end beam through a fixed pulley 2 ', a movable pulley 6', an end part large chain ring 8 ', an eye ring pull rivet 9' and a pull rivet lantern ring 10 ', the fixed pulley 2' is connected to the truck body 3 'through the accessory, the movable pulley 6' is connected with a hand brake pull rod 5 ', and the hand brake pull rod 5' is connected to the truck body 3 'through a hand brake pull rod hanger 4' and the accessory. During hand braking, hand braking force is transmitted to the hand braking pull rod 5 'through the chain 7' by rotating a hand wheel of the hand brake 1 ', and then the hand braking pull rod 5' transmits the hand braking force to a front braking lever of a vehicle body foundation braking device through a short chain connected with the end part of the hand braking pull rod and the front braking lever, and finally the hand braking force is transmitted to wheel braking force to perform vehicle braking. The existing hand braking chain structure is formed by sleeving a plurality of closed elliptical chain links 7.1 'which are adjacent and vertically angled (as shown in fig. 2), the elliptical chain links 7.1' are formed by bending round steel, and the joints 7.2 'of each elliptical chain link 7.1' are welded into a closed shape. In vehicle operation, due to the influence of corrosion, welding defects and external force damage of the oval chain link 7.1 ', one or more chain links in the hand brake chain 7' are easy to break at a welding position or other weak positions, so that the hand brake 1 'is separated from the hand brake pull rod 5', the hand brake cannot play a role of hand braking, and the driving safety of the vehicle is influenced when the broken and drooped chain links penetrate into the lower limit of the vehicle.

When the truck with the NSW type or FSW type hand brake is in a full release position, the difference between the distance between a front brake lever connected with the hand brake pull rod chain and a round pin hole on the hand brake pull rod chain and the length of the hand brake pull rod chain is called loose allowance. In order to solve the problems of poor release of a hand braking device and the like, relevant documents of a railway general company are specified clearly: when the vehicle with the NSW type or FSW type hand brake is in a full release position, the loose allowance of a chain between the front brake lever and the hand brake pull rod is not less than 30 mm. Because the hand brake and the chain thereof are outsourced parts, and a manufacturer has to have production qualification, because of factors such as manufacturing errors, the length of the chain of the hand brake is difficult to control by the manufacturer, the chain is welded by special equipment, and a tension test is required to be carried out on the chain after the welding is finished, if the length of the chain of the hand brake is improper, a vehicle manufacturing and maintenance unit has no qualification and cannot adjust the length of the chain, if the chain returns to the manufacturer for processing, time and labor are wasted, the economy is poor, the production progress is influenced, and the loosening allowance requirement can be ensured by adjusting the sizes of accessories such as a hand brake pull rod, but after the sizes of the accessories such as the hand brake pull rod are adjusted, the interchangeability is poor, the manufacturing and maintenance efficiency is influenced, and the economy is poor; the problem that the chain loosening allowance of the hand brake is insufficient due to the fact that the chain is too short due to overlarge accumulated errors of sizes of accessories of the hand brake such as the length of a chassis of a vehicle body and a mounting seat of the hand brake is solved.

If goods train hand brake chain pine surplus overlength, there may be the goods train hand brake chain that the adjacent wheel base is less and axletree contact, lead to hand brake chain and axletree all to take place the condition of wearing and tearing, can influence driving safety, if hand brake chain is too long moreover, the chain is too much at hand brake spool last book income number of turns, not only influences hand brake transmission efficiency but also can arouse that hand brake jamming leads to the fact to alleviate badly and arouse the driving accident scheduling problem.

At present, the existing technology for quickly repairing chain rings for railway freight cars has the problems that the length of the repaired chain ring cannot be adjusted, the process is complex, the manufacturing cost is high and the like, and only has the function of connecting the chain rings on two sides which are separated and broken after the chain ring is broken, the loose allowance of the chain between a front brake lever and a hand brake pull rod is adjusted, time and labor are wasted, and the interchangeability and the manufacturing and repairing efficiency of accessories such as the hand brake pull rod are influenced, so the problems of low production and working efficiency, poor economy and the like exist; moreover, most of the existing rapid chain ring repairing technologies for railway freight cars adopt structures such as pins, bolts, nuts and the like, and due to structural limitations, when a hand brake chain is under tension, the pins or bolts passing through the existing rapid chain ring repairing technologies for railway freight cars are easily damaged and broken under the action of shearing force, so that the driving safety is affected, and therefore, the development of a rapid chain ring repairing technology with adjustable length for railway freight cars is expected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a length-adjustable quick repair chain ring and a chain for a railway wagon, which innovate a quick repair chain ring length adjustment technology, perfect the quick repair chain ring technology and functions, improve the repair efficiency and quality of a hand brake chain, can adjust the length, have simple structure, high adjustment precision, are quick, simple to operate, can be disassembled and recycled, are convenient to carry and operate, are suitable for various occasions, particularly field operation, have high repair chain efficiency, good economy and guaranteed quality, can not change any structure of the original hand brake device, do not need to carry large tools, and can be assembled and disassembled only by simple tools such as a wrench, a tape measure and the like.

In order to achieve the above object, the present invention provides a quick repair chain link for railway freight cars, adjustable in length, comprising:

the chain ring comprises a connecting part and two matching parts, the connecting part is arc-shaped, the two matching parts are respectively arranged at two ends of the connecting part, and the connecting part and the two matching parts form a U-shaped structure;

the two ends of the adjusting seat are provided with through holes, the two matching parts can be detachably arranged in the through holes in a penetrating mode, one side, close to the connecting part, of the middle of the adjusting seat is provided with an arc groove, and the shape of the arc groove can be matched with the connecting part and a chain link of a railway wagon;

the thin nut is in threaded connection with the matching part and is positioned on one side, close to the connecting part, of the adjusting seat;

the self-locking nut is in threaded connection with the matching part and is positioned on one side, far away from the connecting part, of the adjusting seat;

and the limiting structure is arranged on the adjusting seat and is used for limiting the thin nut to rotate.

Optionally, the adjusting device further comprises an elastic washer, the elastic washer is sleeved on the matching portion, and the elastic washer is arranged between the self-locking nut and the adjusting seat.

Optionally, the limiting structure includes a limiting step, the limiting step is disposed on one side of the adjusting seat close to the thin nut, and the step can block the thin nut from rotating on the matching portion.

Optionally, the limit step is located between the two matching portions, and the arc groove is disposed on the limit step.

Optionally, the height of the limiting step is not greater than the thickness of the thin nut.

Optionally, a section of the matching part away from the connecting part is provided with a split pin hole.

Optionally, the cross sections of the connecting portion and the matching portion are the same and circular, the through hole is a through long round hole, and the diameter of the through long round hole is 0.5-2mm larger than the diameter of the circular hole.

A chain for railway wagons comprises the quick repair chain ring with adjustable length and a plurality of chain links of the railway wagons.

Optionally, two of said quick repair links are disposed in the same or opposite direction between any adjacent two links.

The utility model provides a length-adjustable quick repair chain ring and chain for a railway wagon, which have the beneficial effects that:

1. the device has innovated quick chain ring length adjustable technique of repairing, link ring technique and function are repaired fast, hand brake chain repair efficiency and quality have been improved, and can carry out length adjustment, moreover, the steam generator is simple in structure, the adjustment precision is high, and is swift, the operation is simple, can dismantle and reuse, and convenient to carry and operation are suitable for the especially field work of multiple occasion operation, it is efficient to repair the chain, good economical efficiency, guarantee the quality, can not change any structure of original hand brake device, need not carry large-scale instrument, only with the spanner, simple tools such as tape measure just can assemble and dismantle.

2. The device passes through standard parts except the adjusting seat and the chain ring, is convenient to manufacture and maintain, improves the universality and interchangeability of accessories, can effectively reduce the manufacturing cost, and has the characteristics of low cost, good economy and the like.

3. The device is symmetrically arranged along the center line of the chain, and the two ends of the device are connected with the chain ring connecting part on the chain of the hand brake through the arc structures, so that the device is convenient to swing and rotate, the chain ring is flexibly connected with the hand brake without clamping stagnation, narrow space on the chain ring is fully utilized, and the stress of the device is balanced.

4. The device does not change any spare part of original hand braking device, can satisfy and install additional the transformation at existing tool car, can make the hand braking chain length meet the requirements again after the loading on the car newly, and the transformation expense is few, and the manufacturability is good, saves time, and is efficient, and economic nature is good.

5. The device is connected through the fastener, simple structure, compactness, safe and reliable, simple operation and the symmetrical atress of structure are good.

6. The device has solved the problem that hand brake chain overlength grinds axletree and chain link and arouses driving safety and hand brake chain overlength, and the number of turns is too much to the chain is rolled into on hand brake spool, not only influences hand brake transmission efficiency but also can arouse hand brake jamming to cause and alleviate the bad scheduling problem that arouses the driving accident that arouses.

7. The device meets the requirement of quick adjustment of the length of the chain of the hand brake, in particular to the requirement of quick adjustment of the looseness allowance of the chain which is not less than 30 mm. The problem that the length of a chain of a hand brake is difficult to control due to factors such as manufacturing errors of outsourcing parts such as the hand brake and the chain of the hand brake and the like is solved, a manufacturer must have production qualification, if the length of the chain of the hand brake is improper, a vehicle manufacturer cannot adjust the length of the chain, if the chain is returned to the manufacturer for processing, time and labor are wasted, economy is poor, production progress is affected, loose allowance requirements can be guaranteed by adjusting the sizes of accessories such as a hand brake pull rod, and after the sizes of the accessories such as the hand brake pull rod are adjusted, interchangeability is poor, manufacturing and overhauling efficiency is affected, and economy is poor is solved. The device can also solve the problem that the chain looseness allowance is not enough due to the fact that accumulated errors of sizes of accessories of the hand braking device such as the length of a vehicle body underframe and a hand braking machine mounting seat are too large, and the chain looseness allowance is not enough due to the fact that the chain is too short, and the sizes or positions of the accessories with large errors in the hand braking device do not need to be replaced or changed, so that the assembly efficiency of the hand braking device is improved, and the manufacturing or overhauling cost is reduced.

8. The device can not influence the size of hand braking force, can not block the chain and can not influence the chain to pass through the fixed pulley or the movable pulley.

9. The device has small volume and dead weight, can be conveniently matched with a chain for use in a limited space, and has simple structure of the adjusting seat and the chain ring, and is convenient to manufacture and use. The device has the advantages of good symmetrical stress, high strength, large rigidity and long service life, and no interface can cause fracture.

10. The device can not rotate by the limitation of the step through the positioning thin nut, the end part is prevented from loosening through the self-locking nut, the end part of the chain ring passes through the split pin hole and other measures, the loosening prevention and falling prevention performance of the device is improved, and the connection length and quality of the device are ensured.

11. The chain rings on two sides, which are separated and broken, are connected through the device, so that driving safety accidents caused by broken chains intruding into a limit can be avoided, and the repaired hand braking chain can meet the requirements of safe parking braking force.

12. The device simple structure trains in units such as vehicle section or building and repair factory easily, is fit for promoting.

13. The device's chain link both ends are through screw thread and nut connection structure, and the screw thread only acts on the tension, and the atress is reasonable, thereby has solved pin or bolt that current railway freight car passed through with quick chain link repair technique and has suffered to destroy the emergence of fracture easily under the shearing force effect and influence the driving safety problem.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

Fig. 1 shows a schematic view of a prior art hand brake.

Fig. 2 shows a schematic view of the structure of a chain ring of a prior art hand brake.

Fig. 3 shows a schematic structural view of a quick repair chain link for railway freight cars with an adjustable length according to one embodiment of the present invention.

Fig. 4 shows a schematic view of a structure of an adjustment seat for a quick repair chain loop of a railway wagon with an adjustable length according to an embodiment of the utility model.

FIG. 5 illustrates a top view of an adjustment seat for a railroad freight car quick repair chain loop with an adjustable length, according to one embodiment of the present invention.

FIG. 6 illustrates a left side view of an adjustment seat of a railroad freight car for an adjustable length quick repair chain loop, according to one embodiment of the present invention.

Fig. 7 shows a cross-sectional view a-a of fig. 4 of a railway wagon chain link for quick repair with adjustable length according to one embodiment of the utility model.

Fig. 8 shows a cross-sectional view, in the direction F-F of fig. 3, of a quick repair chain link for railway wagons with an adjustable length according to an embodiment of the utility model.

Fig. 9 shows a schematic structural view of a chain link of a railway wagon with a quick repair chain link of adjustable length according to an embodiment of the utility model.

Fig. 10 shows a schematic view of the use of a quick repair chain link for a railway wagon with an adjustable length according to one embodiment of the utility model.

Fig. 11 shows an enlarged view at E of fig. 10 of a quick repair chain link for a railway wagon with an adjustable length according to an embodiment of the utility model.

Fig. 12 shows a schematic view of a chain for a railway wagon according to an embodiment of the present invention.

Fig. 13 shows a schematic view of a chain for a railway wagon according to an embodiment of the present invention.

Fig. 14 shows a schematic structural view of a chain for a railway wagon according to an embodiment of the present invention.

Reference numbers for the prior hand brake:

1', a hand brake; 2', a fixed pulley; 3', a vehicle body; 4', a hand brake pull rod hanger; 5', a hand brake pull rod; 6', a movable pulley; 7', a chain; 7.1', chain links; 7.2', link interface; 8', end part big chain ring; 9', pulling rivets through eye rings; 10' and a pulling rivet lantern ring.

Description of reference numerals:

1. an adjusting seat; 2. a chain link; 3. a thin nut; 4. an elastic washer; 5. a self-locking nut; 6. a split pin hole; 7. and (4) a step.

Detailed Description

Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

FIG. 3 illustrates a schematic structural view of a quick repair chain link for a railway wagon having an adjustable length according to one embodiment of the present invention; FIG. 4 illustrates a schematic structural view of an adjustment seat for a quick repair chain link of a railway wagon having an adjustable length, according to one embodiment of the present invention;

FIG. 5 illustrates a top view of an adjustment seat for a railroad freight car quick repair chain loop with an adjustable length in accordance with one embodiment of the present invention; FIG. 6 illustrates a left side view of an adjustment seat of a railroad freight car for a quick repair chain loop of adjustable length in accordance with one embodiment of the present invention; FIG. 7 illustrates a cross-sectional view A-A of FIG. 4 of a railway wagon chain loop for quick repair with an adjustable length in accordance with one embodiment of the present invention; FIG. 8 shows a cross-sectional view F-F of FIG. 3 of a railway wagon chain loop for quick repair with an adjustable length according to one embodiment of the present invention;

FIG. 9 illustrates a schematic structural view of a chain link of a railway wagon with a quick repair chain link of adjustable length according to one embodiment of the utility model; FIG. 10 illustrates a schematic view of a railway wagon using a quick repair chain link of adjustable length according to one embodiment of the present invention; fig. 11 shows an enlarged view at E of fig. 10 of a quick repair chain link for a railway wagon with an adjustable length according to an embodiment of the utility model.

As shown in fig. 3-11, a quick repair chain link for railway freight cars, of adjustable length, comprises:

the chain ring 2 comprises a connecting part and two matching parts, the connecting part is arc-shaped, the two matching parts are respectively arranged at two ends of the connecting part, and the connecting part and the two matching parts form a U-shaped structure;

the adjusting seat comprises an adjusting seat 1, through holes are formed in two ends of the adjusting seat 1, two matching parts are detachably arranged in the through holes in a penetrating mode, an arc groove is formed in one side, close to a connecting part, of the middle of the adjusting seat 1, and the shape of the arc groove can be matched with the connecting part and a chain link of a railway wagon;

the thin nut 3 is in threaded connection with the matching part, and the thin nut 3 is positioned on one side, close to the connecting part, of the adjusting seat 1;

the self-locking nut 5 is in threaded connection with the matching part, and the self-locking nut 5 is positioned on one side, far away from the connecting part, of the adjusting seat 1;

and the limiting structure is arranged on the adjusting seat 1 and is used for limiting the rotation of the thin nut 3.

It is specific, adjustment seat 1 both ends are the cuboid structure, it is connected with the cooperation through the through-hole to alternate, cooperate chain ring 2 to constitute two adjacent chain links of enclosed construction connection through adjustment seat 1, make chain 7 'complete continuous, press from both sides tight fixed adjustment seat 1 from both sides through thin nut 3 and self-locking nut 5, and adjust the position of adjustment seat 1 in the cooperation, and then change chain ring 2's length and chain 7's length, reach the effect of adjustment chain 7' pine surplus, and can a plurality of cooperations use, the middle part section of adjustment seat 1 is little, the structure that both ends section is big, the middle part sets up into two horizontal and vertical dimension circular arc groove structure of similar saddle type with the chain link contact surface, and the circular arc minimum sets up in the middle part, circular arc recess through the saddle shape is convenient to be connected the cooperation with adjacent chain link.

Further, chain ring 2 forms through the round steel preparation, the flexible removal of chain ring 2 of being convenient for and rotation, can adjust as required through circular arc structure and circular arc R with chain link 7.1' coupling part on the hand brake chain, be convenient for connect adjustment seat 1 and the length of being convenient for adjust the device, pass through the threaded connection mode with 2 both ends heads of chain ring, concrete round steel diameter PhiD, thread diameter MD, length dimension L, thread length C, two thread part central distance B can adjust according to actual need, (B can not be too big, avoid the atress not good and influence fixed pulley or movable pulley trafficability characteristic after the restoration.

In this embodiment, the adjusting device further comprises an elastic washer 4, the elastic washer 4 is sleeved on the matching portion, and the elastic washer 4 is arranged between the self-locking nut 5 and the adjusting seat 1.

Specifically, the influence of abrasion and vibration impact of the adjusting seat 1 on the self-locking nut 5 is reduced through the elastic washer 4, and the stability is improved.

Furthermore, the thin nut 3 is a hexagonal thin nut, the thin nut 3, the self-locking nut 5 and the elastic washer 4 are standard parts, the universality and interchangeability of accessories are improved, the manufacturing cost can be effectively reduced, the operation and maintenance of operators are convenient, the threaded connection at two ends has the tensile force effect, the stress is good, the micro-adjustment length is simple and rapid, the operation is convenient, the disassembly and the reutilization are realized, the device is suitable for multiple occasions, particularly field operation, the structure of the original hand braking device can not be changed, large tools do not need to be carried, and the assembly and the disassembly can be realized only by simple tools such as a spanner, a tape measure and the like.

In this embodiment, the limiting structure includes a limiting step 7, the limiting step 7 is disposed on one side of the adjusting seat 1 close to the thin nut 3, and the limiting step 7 can block the thin nut 3 from rotating on the matching portion.

Specifically, a gap of 0.5-1mm is arranged between the limiting step 7 and the thin nut 3, and the thin nut 3 is limited to rotate by the limiting step 7, so that the thin nut 3 is prevented from loosening in the use process.

In this embodiment, the limit step 7 is located between the two fitting portions, and the circular arc groove is provided on the limit step 7.

Specifically, the chain links are further limited at the arc grooves through transition connection of the steps 7 and the arc grooves, and connection stability is improved.

In the present embodiment, the height of the limit step 7 is not more than the thickness of the thin nut 3.

In particular, the damage of the limit step 7 is avoided.

In this embodiment, a section of the fitting portion away from the connecting portion is provided with a cotter pin hole 6.

Specifically, the split pin is convenient to install through the split pin hole 6, and the chain falling accident caused by separation of the adjusting seat 1 and the chain ring 2 due to loosening and falling of the self-locking nut 5 is prevented.

In this embodiment, the cross-sections of the connecting portion and the matching portion are the same circle, the through hole is a through long round hole, and the diameter of the through long round hole is 0.5-2mm larger than that of the circle.

Specifically, the matching part is conveniently matched with the adjusting seat 1 in an inserting mode through the through long round hole, and the adaptability is improved.

Fig. 12 is a schematic view showing a structure of a chain for a railway wagon according to an embodiment of the present invention; fig. 13 is a schematic view showing a structure of a chain for a railway wagon according to an embodiment of the present invention; fig. 14 shows a schematic structural view of a chain for a railway wagon according to an embodiment of the present invention.

As shown in fig. 12-14, a chain for a railway wagon includes the above-described adjustable length quick-repair chain ring and a plurality of chain links.

Specifically, the structure of the original hand brake chain can not be changed, the requirements of additionally installing a railway wagon running on an existing maintenance car and a line and assembling the railway wagon on a newly-manufactured railway wagon are met, the broken place of the hand brake chain of the railway wagon is repaired through the quick repairing chain ring, the broken two-side chain links 7.1' are separated and connected, the broken chain is prevented from invading a limit, the normal running of a vehicle is influenced, and the repaired hand brake chain can meet the requirement of safe parking braking.

In this embodiment, two quick repair links are arranged in the same direction or in opposite directions between any two adjacent links 7.1'.

When the quick repairing chain ring is used, taking the quick repairing chain ring to repair a broken railway freight car hand brake chain as an example, firstly, respectively installing two thin hexagonal nuts at equal height positions of the matching parts, enabling adjacent surfaces of the two thin hexagonal nuts to be parallel to each other, respectively penetrating the two matching parts through two chain links, then installing the adjusting seat 1 on the chain ring 2, connecting the two chain links 7.1', simultaneously enabling the arc grooves and the connecting parts to be close to each other, simultaneously enabling the limiting step 7 to be in clamping fit with the thin hexagonal nuts, then installing the elastic washer 4 and the self-locking nut 5, and fixing the adjusting seat 1 on the connecting ring to finish installation;

if the length of the chain ring is not adjusted, the adjusting seat 1 is separated from the chain ring 2, the two thin hexagonal nuts are respectively adjusted to move towards the end part of the chain ring 2, the moving distance is the difference value between the length of the broken chain ring and the measured M value, the adjacent surfaces of the outer ring hexagonal surfaces of the two thin nuts 3 are mutually parallel and are symmetrical to the longitudinal central line of the chain ring 2, then the chain links 7.1 'at two sides of the broken chain link 7.1' are respectively placed into the arc-shaped grooves in the middle parts of the adjusting seat 1 and the chain ring 2, then the arc-shaped groove in the middle part of the adjusting seat 1 faces the chain ring 2 to enable the through hole of the adjusting seat 1 to respectively penetrate into the matching part of the chain ring 2, the limiting steps 7 which can prevent the rotation of the thin hexagonal nuts at two ends of the adjusting seat 1 are clamped into the inner side parallel surfaces of the outer ring hexagonal of the thin nuts which are assembled in advance, the end surfaces of the adjusting seat 1 and the thin hexagonal nuts are contacted, and finally two elastic washers 4 and two self-locking nuts 5 are sequentially arranged, and a cotter pin is arranged in the two cotter pin holes 6 in a penetrating way;

if the length of the chain ring needs to be adjusted, the adjusting seat 1 is separated from the chain ring 2, the two thin hexagonal nuts are respectively adjusted to move towards the connecting part of the chain ring 2, the moving distance is the difference value between the length of the chain link 7.1 ' to be adjusted and the measured M value, the adjacent surfaces of the hexagonal surfaces of the outer rings of the two nuts are mutually parallel and are symmetrical to the longitudinal central line of the chain ring 2, then the chain links 7.1 ' at two sides of the broken chain 7 ' are respectively placed into the arc-shaped grooves in the middle parts of the adjusting seat 1 and the chain ring 2, then the adjusting seat 1 (the arc-shaped groove in the middle part faces the connecting part of the chain ring 2 so that two holes of the adjusting seat 1 are respectively penetrated into the matching part of the chain ring 2, the limiting steps of the two ends of the adjusting seat 1 for preventing the rotation of the thin hexagonal nuts are clamped into the hexagonal inner parallel surfaces of the outer rings of the pre-assembled thin hexagonal nuts, the adjusting seat 1 is contacted with the end surfaces of the thin hexagonal nuts, and finally two elastic washers 4 and two self-locking nuts 5 are sequentially arranged, and a cotter pin is arranged in the two cotter pin holes 6 in a penetrating way;

if the length of the chain 7' needs to be adjusted too much, two or more devices need to be matched for use.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (9)

1. A quick repair chain link for a railway wagon, the chain link having an adjustable length, comprising:

the chain ring comprises a connecting part and two matching parts, the connecting part is arc-shaped, the two matching parts are respectively arranged at two ends of the connecting part, and the connecting part and the two matching parts form a U-shaped structure;

the two ends of the adjusting seat are provided with through holes, the two matching parts can be detachably arranged in the through holes in a penetrating mode, one side, close to the connecting part, of the middle of the adjusting seat is provided with an arc groove, and the shape of the arc groove can be matched with the connecting part and a chain link of a railway wagon;

the thin nut is in threaded connection with the matching part and is positioned on one side, close to the connecting part, of the adjusting seat;

the self-locking nut is in threaded connection with the matching part and is positioned on one side, far away from the connecting part, of the adjusting seat;

and the limiting structure is arranged on the adjusting seat and is used for limiting the thin nut to rotate.

2. The quick length-adjustable repair chain ring for railway freight cars of claim 1, further comprising an elastic washer sleeved on the engagement portion, the elastic washer being disposed between the self-locking nut connection and the adjustment seat.

3. A quick repair chain ring with adjustable length for railway wagon as claimed in claim 1, wherein the stop structure comprises a stop step provided on a side of the adjustment seat adjacent to the thin nut, the step being capable of blocking the thin nut from rotating on the engagement portion.

4. A quick repair chain ring for a railway wagon according to claim 3, wherein the limit step is located between the two engagement portions, and the circular arc groove is provided on the limit step.

5. A quick repair chain ring for railway wagons having an adjustable length, according to claim 4, characterized in that the height of said stop step is not greater than the thickness of said thin nut.

6. A quick repair chain ring for a railway wagon according to claim 1, wherein a section of the engagement portion remote from the connecting portion is provided with a split pin hole.

7. The quick repair chain ring with the adjustable length for a railway wagon of claim 1, wherein the connecting portion and the mating portion have the same circular cross section, the through hole is a through hole, and the diameter of the through hole is 0.5-2mm larger than the diameter of the circular portion.

8. A chain for rail wagons, comprising a length adjustable quick repair chain link according to any one of claims 1 to 7 and a plurality of rail wagon chain links.

9. A chain for a railway wagon as claimed in claim 8, wherein two of the quick-repair chain links are disposed between any adjacent two of the chain links in the same direction or in opposite directions.

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