CN111196527A

CN111196527A - Long-stroke heavy drag chain operation device

Info

Publication number: CN111196527A
Application number: CN202010061713.4A
Authority: CN
Inventors: 孙驰
Original assignee: ZHEJIANG JINFULONG MACHINE TOOL ACCESSORIES CO Ltd
Current assignee: ZHEJIANG JINFULONG MACHINE TOOL ACCESSORIES CO Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-05-26

Abstract

The invention provides a long-stroke heavy drag chain operation device, which comprises: a guide rail; the riding wheel bracket is arranged between the upper section of the drag chain and the lower section of the drag chain, and is provided with a first riding wheel matched with the guide rail and a second riding wheel suitable for supporting the upper section of the drag chain. Because tow chain upper segment and second riding wheel roll connection, compare with prior art, reduced the frictional force between riding wheel support and the tow chain upper segment like this, make riding wheel support non-deformable on the one hand, effectively prevent that the tow chain from derailing and the damage of tow chain body, prolonged life, reduced the maintenance replacement cost, on the other hand has reduced the drive power of tow chain operation.

Description

Long-stroke heavy drag chain operation device

Technical Field

The invention relates to the technical field of drag chains, in particular to a long-stroke heavy drag chain operation device.

Background

The drag chain is suitable for reciprocating motion occasions, is widely applied in the field of automation equipment such as numerical control machine tools, mechanical arms, hoisting and transporting equipment, automatic warehouses and the like, and can play a role in traction and protection of built-in cables, oil pipes, air pipes, water pipes and the like.

The tow chain is formed by the concatenation of a plurality of chain links, and long distance heavy load tow chain is two three hundred meters or longer generally, and the tow chain can be divided into the triplex in the motion process: the drag chain lower segment, drag chain turn to ring section and drag chain upper segment, drag chain lower segment tiling on the supporting rack of drag chain, and drag chain upper segment superpose at the top of drag chain lower segment because of the reason of long distance heavily loaded, and the ring section that turns to of drag chain then forms annular closed form, because drag chain upper segment superpose on drag chain lower segment, can rub drag chain lower segment at drag chain upper segment removal in-process, can seriously wear and tear the drag chain under the heavy condition.

In order to solve the above problems, chinese patent document CN104085657A discloses a long-distance heavy-load supporting device for a drag chain, which includes a supporting frame horizontally extending for supporting a lower section of the drag chain and a supporting mechanism for supporting an upper section of the drag chain, wherein the supporting mechanism includes a supporting bracket transversely movably disposed on the supporting frame, a plurality of supporting wheels disposed on the supporting bracket at intervals for supporting the bottom of the upper section of the drag chain, and a roller disposed on the supporting bracket and located in a turning ring section of the drag chain; when the drag chain turns to the ring section and moves transversely, the roller can be driven to move transversely, so that the supporting bracket is driven to move transversely, and the upper section of the drag chain is always supported on the supporting wheel. For a long-distance drag chain, the length of the corresponding support bracket is also longer, and the support bracket is generally formed by a plurality of support wheel assemblies through connecting rods, as shown in fig. 14, each support wheel assembly comprises a fixed shaft 02, two support wheels 04 arranged at two sides of the fixed shaft 02 and two connecting plates 01, and two ends of each connecting plate 01 are fixedly connected with the connecting rods 03 at the left side and the right side through bolts respectively.

The defects of the scheme are as follows: because a certain fit clearance is formed between two adjacent chain links, which is generally about 0.2mm, when the driving mechanism drives the upper section of the drag chain to move rightward from the initial position until the drag chain turns to the ring section to drive the roller of the support bracket to move rightward, the fit clearance between the chain links of the upper section of the drag chain can be reduced until the chain links are butted and connected with each other, in the process, the support bracket and the lower section of the drag chain are kept still, that is, the upper section of the drag chain can move a certain distance (taking a hundred meters of drag chain as an example, the moving distance of the upper section of the drag chain is about 0.4-0.5 meter) relative to the support bracket, the upper section of the drag chain and the fixed shaft 02 and the connecting rod 03 of the bracket assembly have sliding friction, the sliding friction force is large, the connecting plate 01 and the fixed shaft 02 shown in fig. 15 can be inclined at a certain angle under the long-time action, the normal operation of the support bracket is affected, and even more, the fixed shaft 02 and the riding wheel 04 are arched, so that the upper section of the drag chain can be separated from the bearing bracket, and the maintenance cost is increased.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects of easy arching, short service life and high maintenance cost of a support bracket of the long-stroke drag chain in the prior art, thereby providing a long-stroke heavy drag chain running device with long service life.

The invention provides a long-stroke heavy drag chain running device, which comprises a guide rail and a supporting roller bracket, wherein the supporting roller bracket is arranged between an upper section of a drag chain and a lower section of the drag chain, is provided with a first supporting roller matched with the guide rail, and is provided with a second supporting roller suitable for supporting the upper section of the drag chain.

The second riding wheel is arranged above the guide rail.

The riding wheel support is provided with baffle plates which are respectively arranged on two sides of the upper section of the drag chain so as to limit the moving position of the upper section of the drag chain.

The top shaping of baffle has towards keeping away from the first kink of tow chain upper segment direction bending.

The baffle is followed the front end and the rear end of tow chain upper segment moving direction all form and have the second kink, the second kink is towards keeping away from the direction of tow chain upper segment is buckled.

And limiting parts opposite to the corresponding baffle plates are uniformly arranged on two sides of the drag chain along the length direction of the drag chain.

And guide rollers which can be abutted against the inner wall of the guide rail to limit the moving position of the riding wheel support are arranged on two sides of the riding wheel support in the width direction.

The riding wheel bracket is formed by connecting a plurality of riding wheel assemblies through connecting rods, each riding wheel assembly comprises a first fixed shaft, a connecting plate and a supporting piece, the first fixed shafts are arranged along the width direction of the guide rail, and the first riding wheels are arranged on two sides of each first fixed shaft; the connecting plate is fixedly arranged on the first fixed shaft, and two sides of the connecting plate are fixedly connected with the two connecting rods respectively; the supporting piece is fixedly arranged on the connecting plate and provided with two baffles which are respectively arranged on two sides of the connecting plate in the length direction, and the second riding wheel is arranged between the two baffles.

The connecting plate is of a structure shaped like a Chinese character 'ji', the first transverse plate parts on two sides of the connecting plate are suitable for being connected with the connecting rod, and the second transverse plate part in the middle of the connecting plate is fixedly connected with the supporting piece.

One end of the supporting wheel bracket is provided with a third supporting wheel suitable for supporting a steering ring section of the drag chain, and the third supporting wheel is provided with a protective cover suitable for preventing the steering ring section of the drag chain from arching.

The inner wall of the protective cover is provided with a plurality of traction assemblies distributed along the outer contour of the steering ring section of the drag chain, each traction assembly comprises a second fixed shaft and a traction wheel, and the second fixed shaft is arranged on the protective cover; the two traction wheels are arranged at two ends of the second fixed shaft and can be matched with the outer side of the steering ring section of the drag chain.

The device is characterized by further comprising a driving mechanism suitable for driving the upper section of the drag chain to reciprocate, wherein the driving mechanism comprises a power mechanism and an offset correction structure, the offset correction structure is connected with the upper section of the drag chain and the power mechanism, and the offset correction structure is suitable for correcting the position of the upper section of the drag chain on the riding wheel support.

The offset correction structure comprises an optical axis bracket and a drag chain connecting piece, the optical axis bracket is connected with the power mechanism, and an optical axis linear guide rail is arranged on the optical axis bracket; one end of the drag chain connecting piece is fixedly connected with the upper section of the drag chain, and the other end of the drag chain connecting piece is fixedly provided with a sliding table which is connected with the optical axis linear guide rail in a sliding manner.

And a driving force sensor connected with a control system is arranged between the optical axis bracket and the power mechanism, and the control system can control the power mechanism to work.

The technical scheme of the invention has the following advantages:

1. the invention provides a long-stroke heavy-duty drag chain running device, wherein a riding wheel bracket is provided with a first riding wheel matched with a guide rail and a second riding wheel suitable for supporting the upper section of a drag chain, and the upper section of the drag chain can be in rolling connection with the second riding wheel.

2. According to the long-stroke heavy-duty drag chain operation device provided by the invention, the second supporting wheel is arranged above the guide rail, and the upper section of the drag chain is arranged on the second supporting wheel, namely, enough space is reserved between the upper section of the drag chain and the guide rail to allow a maintainer to stretch into the second supporting wheel, so that the lower section of the drag chain is overhauled.

3. According to the long-stroke heavy drag chain operation device provided by the invention, the riding wheel support is provided with the baffle plates which are respectively arranged on two sides of the upper section of the drag chain so as to limit the moving position of the upper section of the drag chain, the baffle plates can prevent the upper section of the drag chain from derailing, and the reliability is high.

4. According to the long-stroke heavy drag chain operation device provided by the invention, the first bending part which is bent towards the direction far away from the upper section of the drag chain is formed at the top of the baffle, and the first bending part can prevent the upper section of the drag chain from being separated from the riding wheel bracket when the upper section of the drag chain shakes due to shaking when the upper section of the drag chain moves, so that the reliability is further improved.

5. According to the long-stroke heavy drag chain running device provided by the invention, the baffle is provided with the second bending parts formed at the front end and the rear end along the moving direction of the upper section of the drag chain, the second bending parts are bent towards the direction far away from the upper section of the drag chain, and the second bending parts can increase the width of the baffle, so that the upper section of the drag chain is prevented from deviating.

6. According to the long-stroke heavy drag chain running device provided by the invention, the limiting parts opposite to the corresponding baffle plates are uniformly arranged on two sides of the drag chain along the length direction of the drag chain, so that a certain distance can be kept between the upper section of the drag chain and the baffle plates, the normal running of the drag chain is ensured, and the drag chain or the baffle plates are prevented from being abraded due to friction between the upper section of the drag chain and the baffle plates after being deflected.

7. According to the long-stroke heavy-duty drag chain operation device provided by the invention, the guide rollers which can be abutted against the inner wall of the guide rail and limit the moving position of the support roller bracket are arranged on the two sides of the support roller bracket in the width direction, so that the support roller bracket is prevented from deviating to one side due to the upper section of the drag chain, the operation resistance caused by friction between the first support roller and the inner wall of the guide rail is increased, the normal operation of the drag chain is ensured, and the service lives of the first support roller and the guide rail are prolonged.

8. The invention provides a long-stroke heavy drag chain running device, wherein a connecting plate is of a n-shaped structure, first transverse plate parts on two sides of the n-shaped connecting plate are suitable for being connected with a connecting rod, and a second transverse plate part in the middle of the n-shaped connecting plate is fixedly connected with a supporting piece. The connecting plate structure of a few font is more firm, can support piece better, in addition, has reduced the quantity of connecting plate, more convenient assembly.

9. According to the long-stroke heavy-duty drag chain operation device provided by the invention, one end of the riding wheel bracket is provided with the third riding wheel suitable for supporting the steering ring section of the drag chain, and the third riding wheel is provided with the protective cover suitable for preventing the steering ring section of the drag chain from arching, so that the steering ring section of the drag chain is not easy to separate from the third riding wheel, and the reliability is improved.

10. According to the long-stroke heavy-duty drag chain operation device provided by the invention, the inner wall of the protective cover is provided with a plurality of traction assemblies distributed along the outer contour of the drag chain steering ring section, and the traction assemblies can be matched with the drag chain steering ring section on one hand to drive the riding wheel bracket to move, and on the other hand, can prevent the drag chain steering ring section from arching.

11. The invention provides a long-stroke heavy drag chain running device, wherein a driving mechanism comprises a power mechanism and an offset correction structure for connecting the upper section of a drag chain with the power mechanism, and the offset correction structure is suitable for correcting the position of the upper section of the drag chain on a riding wheel bracket. Through setting up the skew structure of rectifying, can rectify the position of tow chain upper segment on the riding wheel support when the guide rail takes place the skew, effectively reduce the running resistance of tow chain, the reliability is high, has prolonged life.

12. The invention provides a long-stroke heavy drag chain running device, which comprises an offset correction structure and a drag chain running device, wherein the offset correction structure comprises: the optical axis bracket is connected with the power mechanism and is provided with an optical axis linear guide rail; one end of the drag chain connecting piece is fixedly connected with the upper section of the drag chain, and the other end of the drag chain connecting piece is fixedly provided with a sliding table which is connected with the optical axis linear guide rail in a sliding manner. When the running direction of the riding wheel support is not parallel to the running direction of the upper section of the drag chain, the sliding table on the drag chain connecting piece can slide relative to the optical axis linear guide rail, so that the positions of the upper section of the drag chain and the riding wheel support are adjusted, the two sides of the upper section of the drag chain and the baffle keep proper intervals, and the optical axis linear guide rail and the sliding table have the advantage of simple structure.

13. According to the long-stroke heavy-duty drag chain running device, the driving force sensor connected with the control system is arranged between the optical axis support and the power mechanism, the control system can control the power mechanism to work, and when resistance of the drag chain is increased due to faults, the driving force sensor can timely transmit resistance data to the control system, so that the power mechanism is controlled to stop working, and fault upgrading is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of an assembly structure of a long-stroke heavy-duty drag chain running device and a drag chain of the present invention;

FIG. 2 is a schematic view of the guide rail of FIG. 1;

FIG. 3 is a perspective view of the riding wheel support;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

FIG. 5 is a schematic structural view of the idler assembly;

FIG. 6 is a schematic view of the assembly of the idler assembly and the upper section of the drag chain;

FIG. 7 is a left side view of the idler carriage of FIG. 3;

FIG. 8 is a partial cross-sectional view of FIG. 1;

FIG. 9 is a perspective view of the drive mechanism;

FIG. 10 is a perspective view of the drive mechanism of FIG. 8, shown flipped over at an angle;

FIG. 11 is an exploded view of the drive mechanism;

FIG. 12 is a cross-sectional view of FIG. 9;

FIG. 13 is a partial schematic view of a guide rail;

FIG. 14 is a partial schematic view of a prior art support bracket;

fig. 15 is a schematic view showing the link and the link plate of fig. 14 being inclined.

Description of reference numerals: 01. a connecting plate; 02. a fixed shaft; 03. a connecting rod; 04. a riding wheel;

1. a guide rail; 11. a first guide groove; 12. a second guide groove; 2. a riding wheel support; 21. a first riding wheel; 22. A second riding wheel; 23. a baffle plate; 231. a first bent portion; 232. a second bent portion; 24. a guide roller; 25. a connecting rod; 26. a first fixed shaft; 27. a connecting plate; 271. a first horizontal plate portion; 272. a second horizontal plate portion; 28. a support member; 29. a third riding wheel; 3. a drag chain; 31. an upper section of the drag chain; 32. a lower drag chain section; 33. A tow chain turning ring segment; 4. a limiting member; 5. a protective cover; 51. a first top plate; 52. a first side plate; 6. a traction assembly; 61. a traction wheel; 62. a second fixed shaft; 63. a fourth riding wheel; 7. an offset correction structure; 71. An optical axis support; 711. a second top plate; 712. a second side plate; 72. an optical axis linear guide rail; 73. a tow chain connector; 74. a sliding table; 75. a driving force sensor; 76. a first drive plate; 77. a second drive plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The embodiment provides a long-stroke heavy-duty drag chain operation device, as shown in fig. 1 and 2, which is suitable for supporting and driving a drag chain 3 to reciprocate, wherein the drag chain 3 includes a drag chain upper section 31, a drag chain turning ring section 33 and a drag chain lower section 32, which are connected in sequence, and the long-stroke heavy-duty drag chain operation device includes a guide rail 1, a riding wheel bracket 2 and a driving mechanism.

The guide rail 1, as shown in fig. 13, includes a first guide groove 11 for the first idler 21 to be roll-fitted, and a second guide groove 12 for the third idler 29 to be roll-fitted.

The riding wheel bracket 2 is arranged between the upper section 31 and the lower section 32 of the drag chain, and comprises a riding wheel assembly, a connecting rod 25, a third riding wheel 29 and a fourth riding wheel 63.

As shown in fig. 4-6, the idler assembly includes a first fixed shaft 26, a first idler 21, a connecting plate 27, a supporting member 28, and a second idler 22. The first fixed shaft 26 is arranged along the width direction of the guide rail 1, and two sides of the first fixed shaft are provided with first riding wheels 21 which are in rolling connection with the guide groove of the guide rail 1; a connecting plate 27 having a zigzag structure, wherein first transverse plate portions 271 of two sides of the zigzag connecting plate 27 are adapted to be connected to the first fixed shaft 26 and the two connecting rods 25 of two sides by bolts, and a second transverse plate portion 272 of the middle thereof is fixedly connected to the supporting member 28; a supporting member 28 fixedly disposed on the connecting plate 27, the supporting member 28 having two baffles 23 respectively disposed at two sides in a length direction thereof to limit a moving position of the upper section 31 of the drag chain, a second riding wheel 22 installed between the two baffles 23 for supporting the upper section 31 of the drag chain and rolling relative to the upper section 31 of the drag chain, the second riding wheel 22 being disposed above the guide rail 1 to facilitate maintenance, a first bending portion 231 bending toward a direction away from the upper section 31 of the drag chain is formed at a top of the baffle 23, second bending portions 232 are formed at front and rear ends of the upper section 31 of the drag chain, the second bending portions 232 bending toward a direction away from the upper section 31 of the drag chain, stoppers 4 opposite to the baffles 23 are uniformly disposed at two sides of the drag chain 3 along the length direction thereof, the stoppers 4 including a connecting portion in threaded connection with the drag chain 3, and a limiting part positioned at the outer side of the chain plate. In this embodiment, the second supporting roller 22 is a roller sleeved on the first fixing shaft 26.

And two ends of the connecting rod 25 are fixedly connected with the two riding wheel assemblies through bolts, as shown in fig. 4, one side of the connecting rod 25, which faces the guide rail, is provided with a guide roller 24 which is abutted against the inner wall of the guide rail 1 so as to limit the moving position of the riding wheel bracket 2.

As shown in fig. 7 and 8, the third idler 29 is connected with the guide rail 1 in a rolling manner and is adapted to support the towline turning ring segment 33, a protective cover 5 adapted to prevent the towline turning ring segment 33 from arching is provided on the third idler 29, the protective cover 5 includes a first top plate 51 adapted to prevent the towline turning ring segment 33 from arching, and two first side plates 52 located at two sides of the first top plate 51, a plurality of traction assemblies 6 distributed along an outer contour of the towline turning ring segment 33 are provided between the two first side plates 52, and the traction assemblies include: two ends of the second fixed shaft 62 are fixedly connected with the first side plate 52, and two traction wheels 61 are arranged at two ends of the second fixed shaft 62 and can be matched with the outer side of the steering ring section 33 of the drag chain. The fourth supporting roller 63 is connected with the guide rail 1 in a rolling manner and is connected with the second fixed shaft 62 of one of the traction assemblies 6 through a connecting rod.

As shown in fig. 9 to 12, the driving mechanism includes a power mechanism and an offset correcting structure 7, the offset correcting structure 7 connects the upper tow chain section 31 and the power mechanism, the offset correcting structure 7 is adapted to correct the position of the upper tow chain section 31 on the riding wheel support 2, and the offset correcting structure 7 includes: the optical axis bracket 71 is connected with the power mechanism, the optical axis bracket 71 comprises a second top plate 711 and two second side plates 712 arranged at two sides of the second top plate 711, and two optical axis linear guide rails 72 are arranged between the two second side plates 712; one end of the drag chain connecting piece 73 is fixedly connected with the drag chain upper section 31, the other end of the drag chain connecting piece is fixedly provided with four sliding tables 74, and the four sliding tables 74 are slidably connected with the corresponding optical axis linear guide rails 72. The power mechanism comprises a first driving plate 76, a second driving plate 77 and a driving force sensor 75, wherein the first driving plate 76 is fixedly connected with a second top plate 711, the second driving plate 77 is connected with a power trolley (not shown in the figure), and the driving force sensor 75 is arranged between the first driving plate 76 and the second driving plate 77 and is suitable for feeding back the driving force to a control system so as to control the power trolley to work. It should be noted that, in an ideal state, the guide rail 1 is a linear guide rail, and the running direction of the riding wheel support 2 is parallel to the running direction of the upper section 31 of the tow chain, but in actual use, the guide rail 1 may have a deviation, which causes the running direction of the riding wheel support 2 to be not parallel to the running direction of the upper section 31 of the tow chain, so that the upper section 31 of the tow chain may continuously contact and rub with the baffle 23 of the riding wheel support 2, thereby increasing the driving force of the power mechanism, and by providing the deviation correction structure, when the guide rail deviates, after the limit part 4 on one side of the upper section 31 of the tow chain temporarily contacts with the baffle 23, the sliding table at one end of the upper section 31 of the tow chain may slide relative to the optical axis linear guide rail 72, thereby adjusting the position of the upper section 31 of the tow chain on the riding wheel support 2, so that the upper section 31 of the tow chain does not contact.

As an alternative embodiment, the second idler may be a plurality of rollers that are rotatably mounted on the first stationary shaft.

As an alternative embodiment, the stop 4 is integrally formed on the link plate of the drag chain 3.

According to the long-stroke heavy-duty drag chain operation device, the riding wheel support 2 is provided with the first riding wheel 21 matched with the guide rail 1 and the second riding wheel 22 suitable for supporting the drag chain upper section 31, and the drag chain upper section 31 can be in rolling connection with the second riding wheel 22. .

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A long-stroke heavy-duty drag chain operation device, comprising:

a guide rail (1);

the riding wheel bracket (2) is arranged between the upper section (31) and the lower section (32) of the drag chain, and is provided with a first riding wheel (21) matched with the guide rail (1) and a second riding wheel (22) suitable for supporting the upper section (31) of the drag chain.

2. A long-stroke heavy-duty drag chain running device according to claim 1, characterized in that the second riding wheel (22) is provided above the guide rail (1).

3. A long-stroke heavy-duty drag chain running device according to claim 1 or 2, characterized in that the idler support (2) has a baffle (23) provided on both sides of the drag chain upper section (31) to define the position of movement of the drag chain upper section (31).

4. A long-stroke heavy-duty tow chain running device according to claim 3, wherein the top of the baffle plate (23) is formed with a first bend (231) that bends away from the tow chain upper section (31).

5. The long-stroke heavy-duty drag chain running device according to claim 4, wherein the baffle (23) is formed with a second bent part (232) at the front end and the rear end along the moving direction of the drag chain upper section (31), and the second bent part (232) is bent towards the direction far away from the drag chain upper section (31).

6. A long-stroke heavy-duty drag chain running device according to any one of claims 3-5, characterized in that both sides of the drag chain (3) are provided with stoppers (4) along its length direction uniformly opposite to the corresponding baffle (23).

7. A long-stroke heavy-duty drag chain running device according to any one of claims 1-6, characterized in that the width direction of the idler support (2) is provided at both sides with guide rollers (24) which can abut against the inner wall of the guide rail (1) to define the moving position of the idler support (2).

8. A long travel heavy duty drag chain running gear according to any one of claims 3-7, characterized in that the idler brackets (2) are formed by several idler assemblies connected by a link (25), the idler assemblies comprising:

the first fixed shaft (26) is arranged along the width direction of the guide rail (1), and the two sides of the first fixed shaft are provided with the first riding wheels (21);

the connecting plate (27) is fixedly arranged on the first fixed shaft (26), and two sides of the connecting plate are fixedly connected with the two connecting rods (25) respectively;

the supporting piece (28) is fixedly arranged on the connecting plate (27), the supporting piece (28) is provided with two baffles (23) which are respectively arranged on two sides of the length direction of the supporting piece (28), and the second riding wheel (22) is arranged between the two baffles (23).

9. A long travel heavy duty drag chain running gear according to claim 8, characterized in that the connecting plate (27) is a zigzag structure, the first cross plate portion (271) of the zigzag connecting plate (27) on both sides being adapted to connect the connecting rod (25), and the second cross plate portion (272) in the middle being fixedly connected to the support (28).

10. A long travel heavy duty drag chain running gear according to any one of claims 1-9, characterized in that one end of the idler support (2) is provided with a third idler (29) adapted to support a drag chain steering ring segment (33), and that the third idler (29) is provided with a protective cover (5) adapted to prevent the drag chain steering ring segment (33) from arching.

11. A long travel heavy duty tow chain running gear according to claim 10, c h a r a c t e r i z e d in that the protective cover (5) has on its inner wall a number of tow assemblies (6) distributed along the outer contour of the tow chain turning ring section (33), the tow assemblies (6) comprising:

the second fixed shaft (62) is arranged on the protective cover (5);

and the two traction wheels (61) are arranged at two ends of the second fixed shaft (62) and can be matched with the outer side of the steering ring section (33) of the drag chain.

12. A long-stroke heavy-duty tow chain running device according to any one of claims 1-11, further comprising a driving mechanism adapted to drive the tow chain upper section (31) in a reciprocating motion, the driving mechanism comprising:

a power mechanism;

the offset correction structure (7) is used for connecting the upper drag chain section (31) with the power mechanism, and the offset correction structure (7) is suitable for correcting the position of the upper drag chain section (31) on the riding wheel bracket (2).

13. A long-stroke heavy-duty tow chain running device according to claim 12, characterized in that the offset correction structure (7) comprises:

the optical axis bracket (71) is connected with the power mechanism, and an optical axis linear guide rail (72) is arranged on the optical axis bracket (71);

one end of the drag chain connecting piece (73) is fixedly connected with the drag chain upper section (31), and the other end of the drag chain connecting piece is fixedly provided with a sliding table (74) which is connected with the optical axis linear guide rail (72) in a sliding manner.

14. A long-stroke heavy-duty towline running apparatus according to claim 13, characterized in that a driving force sensor (75) connected to a control system is provided between said optical axis bracket (71) and said power mechanism, said control system controlling said power mechanism to operate.