Passive Articulated Conveyor Trough for Scraper Conveyor of Roadheader

Abstract

The present invention provides a passive articulated conveying trough for a scraper conveyor of a roadheader, which is used to connect the tail and the middle trough and belongs to the technical field of roadheaders. It includes a first articulated trough, a second articulated trough and a swinging mechanism. The first articulated trough and the second articulated trough are arranged oppositely. Below the opposite ends of the first articulated trough and the second articulated trough, a first connecting plate and a second connecting plate are respectively provided. The swinging mechanism includes a connecting head, a first swinging shaft and a second swinging shaft. The upper end of the first swinging shaft is rotatably connected to the first articulated trough, and the lower end is rotatably connected to the first connecting plate. The two ends of the second swinging shaft are respectively rotatably connected to the second connecting plate. When the cutting head of the roadheader drives the tail to make a lateral swing or a longitudinal swing, the first articulated trough connected to the tail can rotate around the axis of the first swinging shaft or the axis of the second swinging shaft, so that the tail can make a lateral swing or a longitudinal swing relative to the middle trough, ensuring that the excavated materials always fall on the tail and avoiding material scattering.

Description

Technical Field

[0001] The invention belongs to the technical field of roadheaders, and particularly relates to a passive articulated conveying trough of a scraper conveyor for a roadheader. Background Art

[0002] In current engineering activities such as roadway and tunnel driving and partial mineral mining, a full-face roadheader is often used to complete the work. This type of equipment is used in conjunction with a scraper conveyor to transport the excavated materials. Since the roadheader performs transverse reciprocating cutting during operation, the cutting head of the roadheader enters the cut from the middle and lower part of the roadway. First, it swings left and right to cut out a slot to form a free surface, and then swings upward from bottom to top for cutting. The existing tail of the scraper conveyor is fixedly connected to the middle trough, and the tail cannot make a transverse swing or a longitudinal swing relative to the middle trough along with the operation of the cutting head of the roadheader, resulting in the change of the falling point of the excavated materials in the front, back, left and right directions, and the materials cannot fall on the tail, causing the problem of material scattering. Summary of the Invention

[0003] In view of this, the invention provides a passive articulated conveying trough of a scraper conveyor for a roadheader, which is used as a connecting piece between the tail of the scraper conveyor and the middle trough, so that the tail can make a transverse swing or a longitudinal swing relative to the middle trough along with the operation of the cutting head of the roadheader, so as to ensure that the excavated materials always fall on the tail.

[0004] The technical solution adopted by the invention to solve its technical problems is as follows:

[0005] A passive articulated conveying trough of a scraper conveyor for a roadheader, the two ends of the passive articulated conveying trough of the scraper conveyor for a roadheader are respectively hinged to the tail and the middle trough. The passive articulated conveying trough of the scraper conveyor for a roadheader includes a first articulated trough, a second articulated trough and a swinging mechanism. The first articulated trough and the second articulated trough are arranged opposite to each other. Below the opposite ends of the first articulated trough and the second articulated trough, a first connecting plate and a second connecting plate are respectively provided. The first connecting plate and the second connecting plate are connected by a swinging mechanism. The swinging mechanism includes a connecting head, a first swinging shaft and a second swinging shaft. The first swinging shaft is vertically arranged on the connecting head. The upper end of the first swinging shaft is rotationally connected to the first articulated trough, and the lower end of the first swinging shaft is rotationally connected to the first connecting plate. The second swinging shaft is horizontally arranged on the connecting head, and the two ends of the second swinging shaft are respectively rotationally connected to the second connecting plate. When the cutting head of the roadheader drives the tail to make a transverse swing, the first articulated trough connected to the tail can rotate around the first swinging shaft, so that the tail can make a transverse swing relative to the middle trough. When the cutting head of the roadheader drives the tail to make a longitudinal swing, the first articulated trough connected to the tail rotates around the axis of the second swinging shaft, so that the tail can make a longitudinal swing relative to the middle trough.

[0006] Preferably, the first hinge groove includes a first bottom plate, two first side plates and a first guide plate for guiding the scraper chain. The two first side plates are fixedly connected to both sides of the first bottom plate, the first guide plate is fixedly connected between the two first side plates, and a mounting hole is formed in the middle of the rear end of the first guide plate. The first connecting plate is arranged at the bottom of the rear end of the first guide plate. The upper end of the first swing shaft is rotatably connected to the first guide plate through the mounting hole, and the lower end of the first swing shaft is rotatably connected to the first connecting plate; the second hinge groove includes a second bottom plate, two second side plates and a second guide plate for guiding the scraper chain. The two second side plates are fixedly connected to both sides of the second bottom plate, the second guide plate is fixedly connected between the two second side plates, the second connecting plates are symmetrically arranged at the bottom of the front end of the second guide plate, and the two ends of the second swing shaft are respectively rotatably connected to the two second connecting plates.

[0007] Preferably, the first connecting plate includes a bent plate and a first pressing plate. Semi-circular holes of the same kind are formed at the ends of the bent plate and the first pressing plate. The semi-circular hole on the bent plate and the semi-circular hole on the first pressing plate are detachably connected by bolts to form a first mounting hole for installing the first swing shaft. The two second connecting plates both include a mounting plate and a second pressing plate. Semi-circular holes of the same kind are formed at the ends of the mounting plate and the second pressing plate. The semi-circular hole on the mounting plate and the semi-circular hole on the second pressing plate are detachably connected by bolts to form two second mounting holes for installing the second swing shaft.

[0008] Preferably, the first hinge groove further includes an arc-shaped lapping plate. The arc-shaped lapping plate is fixedly connected to the rear end of the first guide plate. A groove adapted to the arc-shaped lapping plate is formed on the second guide plate. The first guide plate is lapped with the second guide plate of the second hinge groove through the arc-shaped lapping plate.

[0009] Preferably, the first hinge groove further includes a leak-proof baffle. One end of the leak-proof baffle is welded to the side wall of the first side plate, and the other end extends forward and bends outward at a certain angle to prevent the leak-proof baffle from interfering with the second side plate of the second hinge groove. The leak-proof baffle is rectangular, and a fillet is provided at the end of the extended part of the leak-proof baffle. The second hinge groove includes a leak-proof baffle with the same function.

[0010] Preferably, the first hinge groove further includes a material baffle. The material baffle is detachably connected above the first side plate, and an auxiliary baffle is also detachably connected to the outside of the material baffle. A guide plate for the incoming chain and pressing chain of the scraper chain is arranged at the front end of the material baffle, and the guide plate bends upward at a certain angle.

[0011] Preferably, a transverse hinge ear plate for hinging with the tail of the machine is arranged at the front end of the first hinge groove, and a transverse hinge ear plate for hinging with the middle trough is arranged at the rear end of the second hinge groove.

[0012] Preferably, compensating chamfers are provided at the ends of the first guide plate and the first bottom plate of the first hinge groove, which are adapted to the guide plate and the bottom plate of the machine tail. Compensating chamfers are provided at the ends of the second guide plate and the second bottom plate of the second hinge groove, which are adapted to the guide plate and the bottom plate of the middle groove. Compensating chamfers are also provided at the contact ends of the first bottom plate and the second bottom plate.

[0013] Preferably, the length of the first hinge groove is greater than that of the second hinge groove.

[0014] Preferably, a lifting ring is further provided on the second hinge groove, and the lifting rings are symmetrically installed on the outer walls of the two second side plates.

[0015] As can be seen from the above technical solutions, the present invention provides a passive articulated conveying trough for a roadheader scraper conveyor. Compared with the prior art, its beneficial effects are as follows: The two ends of the passive articulated conveying trough for a roadheader scraper conveyor provided by the present invention are respectively hinged to the machine tail and the middle trough. The passive articulated conveying trough for a roadheader scraper conveyor includes a first hinge groove, a second hinge groove and a swing mechanism. The first hinge groove and the second hinge groove are arranged oppositely. Below the opposite ends of the first hinge groove and the second hinge groove, a first connecting plate and a second connecting plate are respectively provided. The first connecting plate and the second connecting plate are connected by a swing mechanism. The swing mechanism includes a connecting head, a first swing shaft and a second swing shaft. The first swing shaft is vertically arranged on the connecting head. The upper end of the first swing shaft is rotatably connected to the first hinge groove, and the lower end of the first swing shaft is rotatably connected to the first connecting plate. The second swing shaft is horizontally arranged on the connecting head, and both ends of the second swing shaft are rotatably connected to the second connecting plate. When the cutting head of the roadheader drives the machine tail to swing horizontally, the first hinge groove connected to the machine tail can rotate around the axis of the first swing shaft, thereby driving the machine tail to swing horizontally relative to the middle trough. When the cutting head of the roadheader drives the machine tail to swing longitudinally, the first hinge groove connected to the machine tail can rotate around the axis of the second swing shaft, thereby driving the machine tail to swing longitudinally relative to the middle trough. And when the first hinge groove swings horizontally relative to the second hinge groove, the second connecting plates on both sides of the first swing shaft form a clamp in the horizontal direction of the connecting head to limit the swing amplitude of the first swing shaft. When the first hinge groove swings longitudinally relative to the second hinge groove, the first connecting plate and the middle plate of the first hinge groove form a clamp in the longitudinal direction of the connecting head to limit the swing amplitude of the second swing shaft, so as to ensure that no collision occurs between the first hinge groove and the second hinge groove when the first hinge groove swings to the limit angle. The passive articulated part of the roadheader scraper conveyor of the present invention serves as a connecting piece between the machine tail and the middle trough, enabling the machine tail to swing horizontally or longitudinally in cooperation with the operation of the cutting head of the roadheader, so as to ensure that the materials cut by the cutting head of the roadheader always fall on the machine tail and the middle trough, avoiding material scattering. Description of the Drawings

[0016] Figure 1It is a schematic structural diagram of a passive articulated conveying trough of a scraper conveyor for a roadheader.

[0017] Figure 2 It is Figure 1 a top-view structural diagram of.

[0018] Figure 3 It is Figure 1 a sectional structural diagram of.

[0019] Figure 4 It is a schematic structural diagram of a swing mechanism.

[0020] Figure 5 It is a top-view structural diagram of a first connecting plate.

[0021] Figure 6 It is a front-view structural diagram of a second connecting plate.

[0022] Figure 7 It is a working state diagram of the lateral swing of a passive articulated conveying trough of a scraper conveyor for a roadheader.

[0023] Figure 8 It is a working state diagram of the longitudinal upward swing of a passive articulated conveying trough of a scraper conveyor for a roadheader.

[0024] Figure 9 It is a working state diagram of the longitudinal downward swing of a passive articulated conveying trough of a scraper conveyor for a roadheader.

[0025] In the figure: Passive articulated conveying trough 100 of a scraper conveyor for a roadheader, first articulated trough 10, first bottom plate 11, first side plate 12, first guide plate 13, first connecting plate 14, bent plate 141, first pressing plate 142, first mounting hole 143, bolt 144, arc-shaped overlapping plate 15, anti-leakage baffle 16, material baffle 17, auxiliary baffle 171, guiding plate 172, second articulated trough 20, second bottom plate 21, second side plate 22, second guide plate 23, second connecting plate 24, mounting plate 241, second pressing plate 242, second mounting hole 243, lifting ring 25, swing mechanism 30, connecting head 31, first swing shaft 32, second swing shaft 33, lateral articulated ear plate 40, compensation chamfer 50, machine tail 200, middle trough 300. Specific embodiments

[0026] The following further elaborates in detail on the technical solutions and technical effects of the embodiments of the present invention in conjunction with the drawings of the present invention.

[0027] Please refer to Figures 1 to 9, the present invention provides a passive articulated conveying trough 100 for a roadheader scraper conveyor. Both ends of the passive articulated conveying trough 100 of the roadheader scraper conveyor are respectively articulated with the machine tail 200 and the middle trough 300. The passive articulated conveying trough 100 of the roadheader scraper conveyor includes a first articulated trough 10, a second articulated trough 20 and a swinging mechanism 30. The first articulated trough 10 and the second articulated trough 20 are arranged oppositely. Below the opposite ends of the first articulated trough 10 and the second articulated trough 20, a first connecting plate 14 and a second connecting plate 24 are respectively provided. The first connecting plate 14 and the second connecting plate 24 are connected by the swinging mechanism 30. The swinging mechanism 30 includes a connecting head 31, a first swinging shaft 32 and a second swinging shaft 33. The first swinging shaft 32 is vertically arranged on the connecting head 31. The upper end of the first swinging shaft 32 is rotationally connected to the first articulated trough 10, and the lower end of the first swinging shaft 32 is rotationally connected to the first connecting plate 14. The second swinging shaft 33 is horizontally arranged on the connecting head 31. Both ends of the second swinging shaft 33 are respectively rotationally connected to the second connecting plate 24. When the first articulated trough 10 makes a lateral swing relative to the second articulated trough 20, the second connecting plates 24 located on both sides of the first swinging shaft 32 form a clamping in the lateral direction of the connecting head 31 to limit the swinging amplitude of the first swinging shaft 32. When the first articulated trough 10 makes a longitudinal swing relative to the second articulated trough 20, the first connecting plate 14 and the middle plate of the first articulated trough 10 form a clamping in the longitudinal direction of the connecting head 31 to limit the swinging amplitude of the second swinging shaft 33, so as to ensure that there is no collision between the first articulated trough 10 and the second articulated trough 20 when the first articulated trough 10 swings to the limit angle. During operation, since the machine tail 200 is articulated with the first articulated trough 10, the first articulated trough 10 and the second articulated trough 20 are connected by the swinging mechanism 30, and the second articulated trough 20 is articulated with the middle trough 300. When the cutting head of the roadheader drives the machine tail 200 to make a lateral swing, the first articulated trough 10 connected to the machine tail 200 can rotate around the first swinging shaft 32, that is, the first articulated trough 10 can make a lateral swing relative to the middle trough 300 connected to the second articulated trough 20, so that the machine tail 200 and the middle trough 300 can cooperate with the operation of the cutting head of the roadheader to achieve lateral swing. When the cutting head of the roadheader drives the machine tail 200 to make a longitudinal swing, the first articulated trough 10 connected to the machine tail 200 rotates around the axis of the second swinging shaft 33, that is, the first articulated trough 10 can make a longitudinal swing relative to the middle trough 300 connected to the second articulated trough 20, so that the machine tail 200 and the middle trough 300 can cooperate with the operation of the cutting head of the roadheader to achieve longitudinal swing, thereby ensuring that the materials cut by the cutting head of the roadheader always fall on the machine tail 200 and the middle trough 300, avoiding material scattering.

[0028] Specifically, the first hinge groove 10 includes a first bottom plate 11, two first side plates 12, and a first guide plate 13 for guiding the scraper chain. The two first side plates 12 are fixedly connected to both sides of the first bottom plate 11. The first guide plate 13 is fixedly connected between the two first side plates 12. An installation hole is formed in the middle of the rear end of the first guide plate 13. The first connecting plate 14 is arranged at the bottom of the rear end of the first guide plate 13. The upper end of the first swing shaft 32 is rotatably connected to the first guide plate 13 through the installation hole, and the lower end of the first swing shaft 32 is rotatably connected to the first connecting plate 14. The second hinge groove 20 includes a second bottom plate 21, two second side plates 22, and a second guide plate 23 for guiding the scraper chain. The two second side plates 22 are fixedly connected to both sides of the second bottom plate 21. The second guide plate 23 is fixedly connected between the two second side plates 22. The second connecting plates 24 are symmetrically arranged at the bottom of the front end of the second guide plate. The two ends of the second swing shaft 33 are respectively rotatably connected to the two second connecting plates 24. The first connecting plate 14 includes a bent plate 141 and a first pressing plate 142. The ends of the bent plate 141 and the first pressing plate 142 are both provided with the same semi-circular holes. The semi-circular hole on the bent plate 141 and the semi-circular hole on the first pressing plate 142 are detachably connected by bolts 144 to form a first installation hole 143 for installing the first swing shaft 32. The two second connecting plates 24 both include a mounting plate 241 and a second pressing plate 242. The ends of the mounting plate 241 and the second pressing plate 242 are both provided with the same semi-circular holes. The semi-circular hole on the mounting plate 241 and the semi-circular hole on the second pressing plate 242 are detachably connected by bolts 144 to form two second installation holes 243 for installing the second swing shaft 33. The purpose of setting the first connecting plate 14 and the second connecting plate 24 in this way is to facilitate the installation and replacement of the swing mechanism 30. When the swing mechanism 30 is damaged, the maintenance personnel can take out the swing structure by removing the bolts 144 on the first connecting plate 14 and the second connecting plate 24, making the disassembly, assembly, maintenance, and replacement of the swing mechanism 30 very convenient and improving the overall service life of the device.

[0029] Further, the first articulated groove 10 further includes an arc-shaped lapping plate 15, which is fixedly connected to the rear end of the first guide plate 13. A groove adapted to the arc-shaped lapping plate 15 is formed on the second guide plate 23. The first guide plate 13 is lapped with the second guide plate 23 of the second articulated groove 20 through the arc-shaped lapping plate 15. When the first articulated groove 10 and the second articulated groove 20 swing horizontally around the first swing shaft 32, the material on the first guide plate 13 is transported to the second guide plate 23 of the second articulated groove 20 through the arc-shaped lapping plate 15, preventing the transported material from leaking out through the gap at the connection between the first articulated groove 10 and the second articulated groove 20, enabling the continuous progress of the material transportation process, improving the material transportation efficiency. At the same time, the arc-shaped lapping plate 15 reserves a gap for the contact ends of the first articulated groove 10 and the second articulated groove 20, so that no interference occurs between the first articulated groove 10 and the second articulated groove 20 when the first articulated groove 10 swings to the limit angle around the first swing shaft 32.

[0030] Further, the first articulated groove 10 further includes a leak-proof baffle 16. One end of the leak-proof baffle 16 is welded to the side wall of the first side plate 12, and the other end extends forward and bends outward at a certain angle to prevent the leak-proof baffle 16 from interfering with the second side plate 22 of the second articulated groove 20. The leak-proof baffle 16 is rectangular, and the end of the leak-proof baffle 16 that extends is provided with a rounded corner. The second articulated groove 20 includes a leak-proof baffle 16 with the same function. The setting of the leak-proof baffle 16 effectively avoids the leakage of materials through the gap between the grooves during the transportation process, improving the material transportation efficiency.

[0031] Further, the first articulated groove 10 further includes a material baffle 17. The material baffle 17 is detachably connected above the first side plate 12, and an auxiliary baffle 171 is also detachably connected to the outside of the material baffle 17. A guide plate 172 for the incoming chain and pressing chain of the scraper chain is provided at the front end of the material baffle 17. The guide plate 172 bends upward at a certain angle to guide the material onto the first guide plate 13. The material baffle 17 is to prevent the material from falling from the outside when the accumulated height of the material is higher than the first side plate 12, increasing the material loading capacity. In addition, the material baffle 17 is detachably connected to the first side plate 12 by bolts. Since the position of the material baffle 17 is close to the tail 200 of the machine, this position area belongs to the position of the cutting head of the roadheader, and the space in this area is small. The detachable setting of the material baffle 17 is to provide a certain operating space for maintenance personnel according to the need for maintenance, facilitating the maintenance personnel to enter for maintenance matters. The auxiliary baffle 171 is also detachably connected to the outside of the material baffle 17 by bolts 144 for disassembly according to the working conditions. For example, when the motor on the cutting head of the roadheader is damaged, the damaged motor needs to be disassembled and then lowered to a position close to the tail 200 and moved outwards. At this time, the material baffle 17 is disassembled to prevent the existence of the material baffle 17 from restricting the position where the motor descends, facilitating the motor to descend to a certain position and then move outwards.

[0032] Further, a transverse hinge ear plate 40 for hinging with the machine tail 200 is provided at the front end of the first hinge groove 10, and a transverse hinge ear plate 40 for hinging with the middle groove 300 is provided at the rear end of the second hinge groove 20. Specifically, there are hinge holes on the transverse hinge ear plate 40. The machine tail 200 and the first hinge groove 10 are hinged by inserting a hinge pin and a retaining ring into the hinge holes of the hinge ear plate, so that the machine tail 200 and the first hinge groove 10 can rotate in a vertical plane around the connection point. Similarly, the second hinge groove 20 and the middle groove 300 are hinged by inserting a hinge pin and a retaining ring into the through holes of the hinge ear plate, so that the second hinge groove 20 and the middle groove 300 can rotate in a vertical plane around the connection point.

[0033] Further, compensation chamfers 50 for matching with the guide plate and the bottom plate of the machine tail 200 are provided at the ends of the first guide plate 13 and the first bottom plate 11 of the first hinge groove 10, compensation chamfers 50 for matching with the guide plate and the bottom plate of the middle groove 300 are provided at the ends of the second guide plate 23 and the second bottom plate 21 of the second hinge groove 20, and a compensation chamfer 50 is also provided at the contact end of the first bottom plate 11 and the second bottom plate 21. The compensation chamfer 50 is provided to compensate for the movement clearance at the connection ends of the machine tail 200 and the first hinge groove 10, the first hinge groove 10 and the second hinge groove 20, and the second hinge groove 20 and the middle groove 300, so as to be more flexible during swinging.

[0034] Further, the length of the first hinge groove 10 is greater than the length of the second hinge groove 20 for better matching with the roadheader.

[0035] Further, a lifting ring 25 is also provided on the second hinge groove 20. The lifting rings 25 are symmetrically installed on the outer walls of the two second side plates 22, and the lifting rings facilitate the overall lifting of the passive articulated conveying trough.

[0036] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A passive articulated conveying trough for a roadheader scraper conveyor. The two ends of the passive articulated conveying trough for the roadheader scraper conveyor are respectively articulated with the machine tail and the middle trough. Characterized in that: The passive articulated conveying trough for the roadheader scraper conveyor includes a first articulated trough, a second articulated trough and a swinging mechanism. The first articulated trough and the second articulated trough are arranged oppositely. Below the opposite ends of the first articulated trough and the second articulated trough, a first connecting plate and a second connecting plate are respectively provided. The first connecting plate and the second connecting plate are connected by the swinging mechanism. The swinging mechanism includes a connecting head, a first swinging shaft and a second swinging shaft. The first swinging shaft is vertically arranged on the connecting head. The upper end of the first swinging shaft is rotatably connected with the first articulated trough, and the lower end of the first swinging shaft is rotatably connected with the first connecting plate. The second swinging shaft is horizontally arranged on the connecting head, and both ends of the second swinging shaft are rotatably connected with the second connecting plate respectively; when the cutting head of the roadheader drives the machine tail to make a lateral swing, the first articulated trough connected to the machine tail can rotate around the axis of the first swinging shaft, that is, the first articulated trough can make a lateral swing relative to the middle trough. When the cutting head of the roadheader drives the machine tail to make a longitudinal swing, the first articulated trough connected to the machine tail can rotate around the axis of the second swinging shaft, that is, the first articulated trough can make a longitudinal swing relative to the middle trough; the first articulated trough includes a first bottom plate, two first side plates and a first guide plate for guiding the scraper chain. The two first side plates are fixedly connected to both sides of the first bottom plate. The first guide plate is fixedly connected between the two first side plates. An installation hole is opened in the middle of the rear end of the first guide plate. The first connecting plate is arranged at the bottom of the rear end of the first guide plate. The upper end of the first swinging shaft is rotatably connected with the first guide plate through the installation hole; the second articulated trough includes a second bottom plate, two second side plates and a second guide plate for guiding the scraper chain. The two second side plates are fixedly connected to both sides of the second bottom plate. The second guide plate is fixedly connected between the two second side plates. The second connecting plate is symmetrically arranged at the bottom of the front end of the second guide plate. Both ends of the second swinging shaft are rotatably connected with the two second connecting plates respectively; the first connecting plate includes a bent plate and a first pressing plate. The ends of the bent plate and the first pressing plate are both provided with the same semi-circular holes. The semi-circular hole on the bent plate and the semi-circular hole on the first pressing plate are detachably connected by bolts to form a first installation hole for installing the first swinging shaft. The two second connecting plates both include an installation plate and a second pressing plate. The ends of the installation plate and the second pressing plate are both provided with the same semi-circular holes. The semi-circular hole on the installation plate and the semi-circular hole on the second pressing plate are detachably connected by bolts to form two second installation holes for installing the second swinging shaft.

2. The passive articulated conveying trough for the roadheader scraper conveyor according to claim 1, Characterized in that: The first articulated trough further includes an arc-shaped overlapping plate. The arc-shaped overlapping plate is fixedly connected to the rear end of the first guide plate. A groove adapted to the arc-shaped overlapping plate is opened on the second guide plate. The first guide plate is overlapped with the second guide plate of the second articulated trough through the arc-shaped overlapping plate.

3. The passive articulated conveying trough of the scraper conveyor for roadheaders as claimed in claim 1, characterized in that: the first articulated trough further includes a leakage prevention baffle, one end of the leakage prevention baffle is welded to the side wall of the first side plate, and the other end extends forward and bends outward at a certain angle to prevent the leakage prevention baffle from interfering with the second side plate of the second articulated trough. The leakage prevention baffle is rectangular, and the end of the leakage prevention baffle that extends out is provided with a rounded corner. The second articulated trough includes a leakage prevention baffle with the same function.

4. The passive articulated conveying trough of the scraper conveyor for roadheaders as claimed in claim 1, characterized in that: the first articulated trough further includes a material baffle, the material baffle is detachably connected above the first side plate, and an auxiliary baffle is also detachably connected to the outside of the material baffle. A guiding plate for the inlet and pressing of the scraper chain is provided at the front end of the material baffle, and the guiding plate bends upward at a certain angle.

5. The passive articulated conveying trough of the scraper conveyor for roadheaders as claimed in claim 1, characterized in that: a transverse articulated ear plate for articulating with the machine tail is provided at the front end of the first articulated trough, and a transverse articulated ear plate for articulating with the middle trough is provided at the rear end of the second articulated trough.

6. The passive articulated conveying trough of the scraper conveyor for roadheaders as claimed in claim 1, characterized in that: compensation chamfers for cooperating with the guiding plate and bottom plate of the machine tail are provided at the ends of the first guiding plate and the first bottom plate of the first articulated trough, compensation chamfers for cooperating with the guiding plate and bottom plate of the middle trough are provided at the ends of the second guiding plate and the second bottom plate of the second articulated trough, and a compensation chamfer is also provided at the contact end of the first bottom plate and the second bottom plate.

7. The passive articulated conveying trough of the scraper conveyor for roadheaders as claimed in claim 1, characterized in that: the length of the first articulated trough is greater than the length of the second articulated trough.

8. The passive articulated conveying trough of the scraper conveyor for roadheaders as claimed in claim 1, characterized in that: lifting rings are further provided on the second articulated trough, and the lifting rings are symmetrically installed on the outer walls of the two second side plates.

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