Receiving shovel plate mechanism of heading machine

Abstract

The invention belongs to the technical field of material receiving of heading machines, and particularly relates to a material receiving shovel plate mechanism of a heading machine, the material receiving shovel plate mechanism comprises a shovel plate main body, the edge of the top of the shovel plate main body is fixedly provided with a U-shaped side protection plate, and the shovel plate main body is rotatably provided with two star wheel shafts which are symmetrically arranged. According to the feeding device, when a star wheel shaft rotates, feeding blades abut against an arc-shaped contact, a sliding rod slides towards the interior of a material stirring barrel, a T-shaped push rod moves along with the sliding rod and extrudes a reset spring, the reset spring is compressed, teeth on the T-shaped push rod are meshed with a sector gear, the sector gear drives a reciprocating swing shaft to rotate, and then a material stirring plate rotates by a certain angle; the material shifting plate is arranged on the material shoveling plate body to shift the materials to the deep position of the material shoveling plate body, so that when the feeding blades continuously rotate, the material shifting plate can continuously swing, the material shifting action and the feeding action can be synchronously carried out, no extra power mechanism is needed, and material receiving is more efficient and smoother.

Description

Technical Field

[0001] The invention relates to a material collecting mechanism of a tunnel boring machine, in particular to a material collecting shovel plate mechanism of a tunnel boring machine. Background Art

[0002] A roadheader is a machine used to dig straight underground tunnels. Roadheaders are divided into open-type roadheaders and shield-type roadheaders. The price is generally over 100 million yuan. It is mainly composed of a traveling mechanism, a working mechanism, a loading mechanism, and a transfer mechanism. As the traveling mechanism moves forward, the cutting head in the working mechanism continuously breaks up the rock and transports the broken rock away. It has the advantages of safety, high efficiency, and good tunnel quality.

[0003] The shovel plate structure of the tunnel boring machine mainly includes a shovel plate part and two star wheels. The two star wheels are arranged on the shovel plate part. The rotation of the star wheels will transfer the mineral materials on the shovel plate part to the material collecting component. However, since the front end of the shovel plate structure is a straight line or a broken line structure, the material transferring part of the star wheel cannot reach the corners of the front end of the shovel plate structure, which can easily cause part of the mineral materials to be placed on the shovel plate, affecting the material collecting capacity of the shovel plate structure of the tunnel boring machine. The shovel plate is also unable to separate and crush large pieces of materials from small pieces of materials. It is necessary to separate and crush the large pieces of materials later. Because the overall proportion of large pieces of materials is not high, the efficiency of further separation and crushing is low, which is very time-consuming and labor-intensive, and will also increase costs. Summary of the invention

[0004] The main purpose of the present disclosure is to provide a material collecting shovel mechanism for a roadheader to effectively solve the problems raised by the inventor in the above-mentioned background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: A material collecting shovel plate mechanism of a roadheader, comprising a shovel plate body, a U-shaped side guard plate fixedly mounted on the edge of the top of the shovel plate body, two symmetrically arranged star wheel shafts rotatably mounted on the shovel plate body, a plurality of feeding blades distributed in a ring array fixedly mounted on the two star wheel shafts, and the rotation directions of the two star wheel shafts are opposite, and a bracket is fixedly mounted on the right side of the shovel plate body; A material transport screen bucket, which is fixedly mounted on the right side of the shovel plate body, and the left end entrance of the material transport screen bucket is located obliquely below the feeding blade, a crushing frame is fixedly mounted on the right side of the bottom of the material transport screen bucket, and a material leakage port is opened at the bottom of the material transport screen bucket; A positioning bottom plate, which is fixedly mounted on the right side of the bottom of the shoveling plate body, and is located below the material transporting screen bucket and the crushing frame; A first power assembly, the first power assembly is used to drive the two star wheel shafts to rotate; A material shifting assembly, which is used to shift materials on the inner and outer edges of the shoveling plate body; A force-applying component, which acts on the material-dispensing component and cooperates with the feeding blade; A screening and conveying component, wherein the screening and conveying component is used to convey and screen materials; A crushing component, wherein the crushing component is used to crush the material; A second power assembly, wherein the second power assembly acts on the screening and feeding assembly and the crushing assembly.

[0006] Preferably, the first power assembly includes a first driving motor, a rotating shaft, a first gear and a second gear, the driving motor is fixedly mounted at the bottom of the scraping plate body, and two symmetrically arranged rotating shafts are rotatably mounted at the bottom of the scraping plate body, and the two rotating shafts are fixedly mounted with a first gear, and the two first gears are meshed with each other, and the output end of the first driving motor is fixedly connected to one of the rotating shafts, and the bottom ends of the two star wheel shafts extend to the bottom of the scraping plate body and are fixedly connected with a second gear, and the second gear is meshed with the first gear, and the diameter of the second gear is larger than that of the first gear.

[0007] Preferably, the material discharging assembly includes a material discharging cylinder, a reciprocating swing shaft and a material discharging plate. The material discharging cylinder is fixedly mounted on the side wall of the side guard plate, the reciprocating swing shaft is rotatably mounted on the material discharging cylinder, and the material discharging plate is fixedly mounted on the top end of the reciprocating swing shaft, and the material discharging plate is close to the left side entrance of the shoveling plate body.

[0008] Preferably, the force-applying assembly includes a sector gear, a return spring, a T-type push rod, a limit stop, a sliding rod and an arc contact. The sliding rod is slidably connected in the material dispensing barrel, and one end of the sliding rod extends to the outside of the material dispensing barrel and is fixedly connected to the arc contact. The left inner wall of the material dispensing barrel is fixedly connected to the return spring, and the other end of the return spring is fixedly connected to the T-type push rod. A limit stop is fixedly installed in the material dispensing barrel, and the other end of the T-type push rod movably passes through the limit stop and is fixedly connected to the sliding rod. A notch is provided on the side of the material dispensing barrel, and the bottom end of the reciprocating swing shaft extends into the notch and is fixedly installed with a sector gear. The T-type push rod is fixedly connected with teeth, and the sector gear meshes with the teeth.

[0009] Preferably, the screening and feeding assembly includes several groups of first conveying members, shaft sprockets, transmission chains and follower touch rods, and the several groups of first conveying members are distributed in sequence from left to right in the material conveying screen bucket. Each group of the first conveying members is composed of two first rollers and a conveyor belt. The two first rollers are rotatably installed in the material conveying screen bucket, and the two first rollers are connected by the first conveyor belt. One first roller in each group of first conveying members extends outside the material conveying screen bucket and is fixedly connected to the shaft sprocket. The shaft sprockets are connected by transmission chains, and a follower touch rod is fixedly connected to the surface of the first conveyor belt.

[0010] Preferably, the gap between two adjacent first conveyor belts is a screening opening, and the size of the screening opening decreases from left to right, and the length of the follower contact rod is smaller than the width of the screening opening.

[0011] Preferably, the crushing assembly comprises a second roller, a crushing barrel, crushing teeth and a third gear, and two symmetrically arranged second rollers are rotatably installed in the crushing frame, and the two second rollers are fixedly installed with a crushing barrel, and the crushing barrel is fixedly installed with crushing teeth, one end of the two second rollers extends outside the crushing frame and is fixedly connected with a third gear, and the two third gears are meshed with each other.

[0012] Preferably, the second power assembly includes a second drive motor and a transmission belt, the second drive motor is fixedly mounted on the back of the crushing frame, one end of one of the second rollers away from the third gear is fixedly connected to the output end of the drive motor, and a first roller in the rightmost first conveying member is connected to the second roller via a transmission belt.

[0013] Preferably, a second conveying member is provided on the positioning base plate, and the second conveying member includes a mounting plate, a third roller and a second conveyor belt. Two groups of mounting plates are fixedly installed on the top of the positioning base plate, and third rollers are rotatably installed on both groups of mounting plates. The two third rollers are connected by a second conveyor belt transmission, and the second conveyor belt is located below the leakage port and the crushing frame.

[0014] In view of this, compared with the prior art, the beneficial effects of the present invention are: (I) In the present application, the first drive motor works to drive one of the rotating shafts to rotate, and under the meshing transmission of the two first gears, the two rotating shafts rotate simultaneously and in opposite directions, and the first gear meshes with the second gear, so that the two star wheel shafts can rotate synchronously and in opposite directions, such as Figure 1 and 5 As shown, the upper star wheel shaft rotates counterclockwise and the lower star wheel shaft rotates clockwise, so that the feeding blades scrape the material toward the conveying screen bucket.

[0015] (ii) In the present application, when the star wheel shaft rotates, the feeding blade will contact the arc contact, causing the slide bar to slide into the material discharging tube, and the T-type push rod will move accordingly and squeeze the reset spring, and the reset spring will be compressed. Since the teeth on the T-type push rod are meshed with the fan gear, the fan gear drives the reciprocating swing shaft to rotate, and then the material discharging plate is rotated by a certain angle to push the material to the depth of the shoveling plate body, so that when the feeding blade continues to rotate, the material discharging plate can swing continuously, so that the material discharging action and the feeding action can be carried out synchronously, without the participation of an additional power mechanism, making the material collection more efficient and smooth.

[0016] (III) In the present application, when the material is fed into the material transporting screen bucket, multiple first conveyor belts transport the material, and the material passes through each screening port in turn and falls onto the second conveyor belt. When the first conveyor belt moves, it will drive the follower touch rod to pass over the screening port, thereby preventing the screening port from being stuck by the material, ensuring the smoothness of the screening material, and facilitating the continuous transportation of the material.

[0017] (IV) In the present application, the material that does not pass through the screening port is fed into the crushing frame, and the second drive motor is operated to drive one of the second rollers to rotate. Under the meshing transmission of the two third gears, the two second rollers rotate in opposite directions, and then the crushing barrel and the crushing teeth crush the material, and finally it falls onto the second conveyor belt and is sent away. The second drive motor drives one of the first rollers through the transmission belt, and under the transmission of the shaft wheel and the transmission chain, the first conveyor belts run at the same time, and then the feeding synchronization in each step is better to avoid material accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a top view of the structure of the material collecting shovel mechanism of the tunnel boring machine provided by the present invention; Figure 2 The figure is a bottom view of the structure of the material collecting shovel mechanism of the tunnel boring machine provided by the present invention; Figure 3 Shown Figure 1 Schematic diagram of the internal structure of the middle barrel; Figure 4 Shown Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 Shown Figure 1 Schematic diagram of the center star wheel shaft after rotation; Figure 6 Shown Figure 1 Schematic diagram of the middle material screening bucket; Figure 7 Shown is a front view of the material transport screen bucket; Figure 8 The figure shows a front cross-sectional view of the material transport screen bucket; Fig. 9 Shown is a rear view of the material transport screen bucket; Fig.10 Shown Fig. 9 Schematic diagram of the local structure in; Fig.11 Shown Figure 1 Schematic diagram of the positioning base plate.

[0019] icon: 1- shovel board body; 101- side guard plate; 102- star wheel shaft; 103- feeding blade; 104- first drive motor; 105- first gear; 106- second gear; 2- material conveying sieve bucket; 201- material leakage port; 202- first rotating roller; 203- first conveyor belt; 204- shaft sprocket; 205- transmission chain; 206- follow-up contact rod; 207- crushing frame; 208- second rotating roller; 209- crushing cylinder; 210- crushing teeth; 211- third gear; 212- second driving motor; 213- transmission belt; 3- Bracket; 4-positioning bottom plate; 401-mounting plate; 402-third rotating roller; 403-second conveyor belt; 5-feeding cylinder; 501-reciprocating swing shaft; 502-feeding plate; 503-sector gear; 504-reset spring; 505-T-type push rod; 506-limit block; 507-slide rod; 508-arc contact. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-11 , the present invention provides the following specific embodiments: Embodiment 1

[0022] A material collecting shovel mechanism of a roadheader, comprising a shovel body 1, a U-shaped side guard plate 101 is fixedly installed at the edge of the top of the shovel body 1, two symmetrically arranged star wheel shafts 102 are rotatably installed on the shovel body 1, a plurality of feeding blades 103 distributed in a ring array are fixedly installed on the two star wheel shafts 102, and the rotation directions of the two star wheel shafts 102 are opposite, and a bracket 3 is fixedly installed on the right side of the shovel body 1; The material transport screen bucket 2 is fixedly installed on the right side of the shovel plate body 1, and the left end entrance of the material transport screen bucket 2 is located obliquely below the feeding blade 103. A crushing frame 207 is fixedly installed on the right side of the bottom of the material transport screen bucket 2, and a material leakage port 201 is opened at the bottom of the material transport screen bucket 2; The positioning bottom plate 4 is fixedly mounted on the right side of the bottom of the shoveling plate body 1, and the positioning bottom plate 4 is located below the material transport screen bucket 2 and the crushing frame 207; A first power assembly, the first power assembly is used to drive the two star wheel shafts 102 to rotate; A material shifting assembly, which is used to shift materials on the inner and outer edges of the shoveling plate body 1; A force-applying component, which acts on the material-dispensing component and cooperates with the feeding blade 103; Screening and conveying assembly, the screening and conveying assembly is used to convey and screen materials; A crushing component, which is used to crush materials; The second power assembly acts on the screening and feeding assembly and the crushing assembly.

[0023] Specifically, the first power assembly includes a first drive motor 104, a rotating shaft, a first gear 105 and a second gear 106. The drive motor is fixedly installed at the bottom of the scraper plate body 1. Two symmetrically arranged rotating shafts are rotatably installed at the bottom of the scraper plate body 1. The first gear 105 is fixedly installed on the two rotating shafts, and the two first gears 105 are meshed with each other. The output end of the first drive motor 104 is fixedly connected to one of the rotating shafts. The bottom ends of the two star wheel shafts 102 extend to the bottom of the scraper plate body 1 and are fixedly connected to the second gear 106, and the second gear 106 is meshed with the first gear 105. The diameter of the second gear 106 is larger than that of the first gear 105.

[0024] Specifically, the material discharging assembly includes a material discharging cylinder 5, a reciprocating swing shaft 501 and a material discharging plate 502. The material discharging cylinder 5 is fixedly mounted on the side wall of the side guard plate 101. The reciprocating swing shaft 501 is rotatably mounted on the material discharging cylinder 5, and the material discharging plate 502 is fixedly mounted on the top of the reciprocating swing shaft 501. The material discharging plate 502 is close to the left entrance of the shoveling plate body 1.

[0025] Specifically, a second conveying member is provided on the positioning base plate 4, and the second conveying member includes a mounting plate 401, a third roller 402 and a second conveyor belt 403. Two groups of mounting plates 401 are fixedly installed on the top of the positioning base plate 4, and the third roller 402 is rotatably installed on the two groups of mounting plates 401. The two third rollers 402 are connected by a second conveyor belt 403. The second conveyor belt 403 is located below the leakage port 201 and the crushing frame 207. The third roller 402 is driven to rotate by an external motor so that the second conveyor belt 403 can continuously convey the material.

[0026] In this embodiment, the first drive motor works to drive one of the rotating shafts to rotate. Under the meshing transmission of the two first gears, the two rotating shafts rotate simultaneously and in opposite directions. The first gear meshes with the second gear, so that the two star wheel shafts can rotate synchronously and in opposite directions. Figure 1 and 5 As shown, the upper star wheel shaft rotates counterclockwise, and the lower star wheel shaft rotates clockwise, so that the feeding blades scrape the material toward the conveying screen bucket; The material conveying and screening bucket transports and screens the materials. The screened materials fall onto the second conveyor belt, and the unscreened materials are thrown into the crushing frame for crushing. The crushed materials also fall onto the second conveyor belt. The external motor drives the third roller to rotate, so that the second conveyor belt continuously transports the materials on it, so that the size of the materials tends to be consistent, large pieces of materials are excluded, and the subsequent screening operation is abandoned; During the feeding process of the feeding blade, Figure 1 and 5 In the process, the upper reciprocating swing shaft will rotate counterclockwise first, and the lower reciprocating swing shaft will rotate clockwise first, so that the material shifting plate shifts the material at the outer edge of the shoveling plate body to the feeding blade, thereby improving the material receiving performance of the shoveling plate body and reducing material omission.

[0027] Embodiment 2

[0028] The force-applying assembly includes a sector gear 503, a return spring 504, a T-type push rod 505, a limit stop 506, a slide rod 507 and an arc contact 508. The slide rod 507 is slidably connected in the material dispensing barrel 5, and one end of the slide rod 507 extends to the outside of the material dispensing barrel 5 and is fixedly connected to the arc contact 508. The return spring 504 is fixedly connected to the left inner wall of the material dispensing barrel 5, and the other end of the return spring 504 is fixedly connected to the T-type push rod 505. The limit stop 506 is fixedly installed in the material dispensing barrel 5, and the other end of the T-type push rod 505 movably passes through the limit stop 506 and is fixedly connected to the slide rod 507. A notch is provided on the side of the material dispensing barrel 5, and the bottom end of the reciprocating swing shaft 501 extends into the notch and is fixedly installed with a sector gear 503. The T-type push rod 505 is fixedly connected with teeth, and the sector gear 503 meshes with the teeth.

[0029] In this embodiment: when the star wheel shaft rotates, the feeding blade will contact the arc contact, causing the slide rod to slide into the material discharging barrel, and the T-shaped push rod will move accordingly and squeeze the reset spring, and the reset spring will be compressed. Since the teeth on the T-shaped push rod are engaged with the fan gear, the fan gear drives the reciprocating swing shaft to rotate, and then the material discharging plate is rotated by a certain angle to push the material to the depth of the shoveling plate body, so that when the feeding blade continues to rotate, the material discharging plate can continue to swing, so that the material discharging action and the feeding action can be carried out synchronously, without the participation of additional power mechanism, making material collection more efficient and smooth.

[0030] Embodiment 3

[0031] The screening and feeding assembly includes several groups of first conveying members, shaft sprockets 204, transmission chains 205 and follower touch rods 206. The several groups of first conveying members are distributed in sequence from left to right in the material conveying screen bucket 2. Each group of first conveying members is composed of two first rollers 202 and a conveyor belt. The two first rollers 202 are rotatably installed in the material conveying screen bucket 2, and the two first rollers 202 are connected by a first conveyor belt 203. One first roller 202 in each group of first conveying members extends to the outside of the material conveying screen bucket 2 and is fixedly connected to the shaft sprocket 204. The shaft sprockets 204 are connected by a transmission chain 205. The surface of the first conveyor belt 203 is fixedly connected to the follower touch rod 206.

[0032] Specifically, the gap between two adjacent first conveyor belts 203 is a screening opening, and the size of the screening opening decreases from left to right, and the length of the follower contact rod 206 is smaller than the width of the screening opening.

[0033] In this embodiment: when the material is fed into the material transport screen bucket, multiple first conveyor belts transport the material, and the material passes through each screening port in turn and falls onto the second conveyor belt. When the first conveyor belt moves, it will drive the follower touch rod to pass over the screening port, thereby preventing the screening port from being stuck by the material, ensuring the smoothness of the screening material, and also facilitating the continuous transportation of the material.

[0034] Embodiment 4

[0035] The crushing assembly comprises a second roller 208, a crushing barrel 209, crushing teeth 210 and a third gear 211. Two symmetrically arranged second rollers 208 are rotatably installed in the crushing frame 207, and the two second rollers 208 are fixedly installed with a crushing barrel 209, and the crushing barrel 209 is fixedly installed with a crushing tooth 210. One end of the two second rollers 208 extends to the outside of the crushing frame 207 and is fixedly connected with a third gear 211, and the two third gears 211 are meshed with each other.

[0036] Specifically, the second power assembly includes a second drive motor 212 and a transmission belt 213. The second drive motor 212 is fixedly mounted on the back of the crushing frame 207. One end of a second roller 208 away from the third gear 211 is fixedly connected to the output end of the drive motor. A first roller 202 in the rightmost first conveying member is connected to the second roller 208 via a transmission belt 213.

[0037] In this embodiment: the material that does not pass through the screening port is sent into the crushing frame, and the second driving motor works to drive one of the second rollers to rotate. Under the meshing transmission of the two third gears, the two second rollers rotate in different directions, and then the crushing cylinder and the crushing teeth crush the material, and finally fall onto the second conveyor belt and be sent away; The second driving motor drives one of the first rotating rollers through the transmission belt, and under the transmission of the shaft material wheel and the transmission chain, the first conveyor belts are driven to run simultaneously, thereby achieving better synchronization of material feeding in each step and avoiding material accumulation.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A material collecting shovel mechanism of a roadheader, characterized in that: The shovel board body (1) comprises a U-shaped side guard plate (101) fixedly mounted at the edge of the top of the shovel board body (1), two symmetrically arranged star wheel shafts (102) are rotatably mounted on the shovel board body (1), a plurality of feeding blades (103) distributed in a ring array are fixedly mounted on the two star wheel shafts (102), and the two star wheel shafts (102) rotate in opposite directions, and a bracket (3) is fixedly mounted on the right side of the shovel board body (1); A material transport screen bucket (2), the material transport screen bucket (2) being fixedly mounted on the right side of the shovel plate body (1), and the left end entrance of the material transport screen bucket (2) being located obliquely below the feeding blade (103), a crushing frame (207) being fixedly mounted on the right side of the bottom of the material transport screen bucket (2), and a material leakage port (201) being provided at the bottom of the material transport screen bucket (2); A positioning bottom plate (4), wherein the positioning bottom plate (4) is fixedly mounted on the right side of the bottom of the shoveling plate body (1), and the positioning bottom plate (4) is located below the material transport screen bucket (2) and the crushing frame (207); A first power assembly, the first power assembly being used to drive two star wheel shafts (102) to rotate; A material shifting assembly, the material shifting assembly being used to shift materials at the inner and outer edges of the shoveling plate body (1); A force-applying component, the force-applying component acts on the material-moving component and is used in conjunction with the feeding blade (103); A screening and conveying component, wherein the screening and conveying component is used to convey and screen materials; A crushing component, wherein the crushing component is used to crush the material; A second power assembly, wherein the second power assembly acts on the screening and feeding assembly and the crushing assembly.

2. The material collecting shovel mechanism of a roadheader according to claim 1, characterized in that: The first power assembly comprises a first drive motor (104), a rotating shaft, a first gear (105) and a second gear (106); the drive motor is fixedly mounted at the bottom of the shovel board body (1); two symmetrically arranged rotating shafts are rotatably mounted at the bottom of the shovel board body (1); the first gear (105) is fixedly mounted on both rotating shafts, and the two first gears (105) are meshed with each other; the output end of the first drive motor (104) is fixedly connected to one of the rotating shafts; the bottom ends of the two star wheel shafts (102) extend to the bottom of the shovel board body (1) and are fixedly connected to the second gear (106); the second gear (106) is meshed with the first gear (105); the diameter of the second gear (106) is larger than the diameter of the first gear (105).

3. The material collecting shovel mechanism of a tunnel boring machine according to claim 2, characterized in that: The material shifting assembly comprises a material shifting cylinder (5), a reciprocating swing shaft (501) and a material shifting plate (502); the material shifting cylinder (5) is fixedly mounted on the side wall of the side guard plate (101); the reciprocating swing shaft (501) is rotatably mounted on the material shifting cylinder (5); and the material shifting plate (502) is fixedly mounted on the top end of the reciprocating swing shaft (501); the material shifting plate (502) is close to the left entrance of the shoveling plate body (1).

4. The material collecting shovel mechanism of a tunnel boring machine according to claim 3, characterized in that: The force-applying assembly comprises a sector gear (503), a return spring (504), a T-shaped push rod (505), a limit stopper (506), a slide rod (507) and an arc-shaped contact (508); the slide rod (507) is slidably connected inside the material-displacing barrel (5), and one end of the slide rod (507) extends outside the material-displacing barrel (5) and is fixedly connected to the arc-shaped contact (508); the return spring (504) is fixedly connected to the inner wall on the left side of the material-displacing barrel (5), and the other end of the return spring (504) is fixedly connected to the inner wall on the left side of the material-displacing barrel (5). A T-shaped push rod (505) is fixedly connected, a limit stopper (506) is fixedly installed in the material dispensing barrel (5), the other end of the T-shaped push rod (505) movably passes through the limit stopper (506) and is fixedly connected to the slide bar (507), a notch is opened on the side of the material dispensing barrel (5), the bottom end of the reciprocating swing shaft (501) extends into the notch and a fan-shaped gear (503) is fixedly installed, and teeth are fixedly connected to the T-shaped push rod (505), and the fan-shaped gear (503) is meshed with the teeth.

5. The material collecting shovel mechanism of a roadheader according to claim 4, characterized in that: The screening material conveying assembly comprises a plurality of groups of first conveying members, shaft sprockets (204), a transmission chain (205) and a follower contact rod (206). The plurality of groups of first conveying members are sequentially distributed from left to right in the material conveying screen bucket (2). Each group of the first conveying members comprises two first rotating rollers (202) and a conveyor belt. The two first rotating rollers (202) are rotatably mounted in the material conveying screen bucket (2), and the two first rotating rollers (202) are connected to each other by a first conveyor belt (203). One first rotating roller (202) in each group of the first conveying members extends outside the material conveying screen bucket (2) and is fixedly connected to the shaft sprocket (204). The shaft sprockets (204) are connected to each other by a transmission chain (205). The surface of the first conveyor belt (203) is fixedly connected to the follower contact rod (206).

6. The material collecting shovel mechanism of a roadheader according to claim 5, characterized in that: The gap left between two adjacent first conveyor belts (203) is a screening opening, and the size of the screening opening decreases from left to right, and the length of the follower contact rod (206) is smaller than the width of the screening opening.

7. The material collecting shovel mechanism of a roadheader according to claim 5, characterized in that: The pulverizing assembly comprises a second roller (208), a crushing cylinder (209), crushing teeth (210) and a third gear (211); two symmetrically arranged second rollers (208) are rotatably mounted in the crushing frame (207); a crushing cylinder (209) is fixedly mounted on the two second rollers (208); crushing teeth (210) are fixedly mounted on the crushing cylinder (209); one end of the two second rollers (208) extends outside the crushing frame (207) and is fixedly connected to the third gear (211); and the two third gears (211) are meshed with each other.

8. The material collecting shovel mechanism of a roadheader according to claim 7, characterized in that: The second power assembly comprises a second drive motor (212) and a transmission belt (213); the second drive motor (212) is fixedly mounted on the back of the crushing frame (207); one end of one of the second rollers (208) away from the third gear (211) is fixedly connected to the output end of the drive motor; a first roller (202) in the rightmost first conveying member is connected to the second roller (208) via a transmission belt (213).

9. The material collecting shovel mechanism of a roadheader according to claim 8, characterized in that: The positioning base plate (4) is provided with a second conveying member, the second conveying member comprising a mounting plate (401), a third roller (402) and a second conveyor belt (403); two groups of mounting plates (401) are fixedly mounted on the top of the positioning base plate (4); the third roller (402) is rotatably mounted on both groups of mounting plates (401); the two third rollers (402) are transmission-connected via a second conveyor belt (403); the second conveyor belt (403) is located below the material leakage port (201) and the crushing frame (207).

Images