A belt conveyor adjustment device, a rear-mounted belt conveyor, and a tunneling machine.

Abstract

This invention relates to the field of belt conveyor technology, specifically disclosing a belt conveyor adjustment device, a rear-mounted belt conveyor, and a tunneling machine. The belt conveyor adjustment device includes a fixed body and a boom, wherein the boom is an extended boom hinged to an extension drive device capable of driving the boom to extend. The front end of the extended boom is connected to the fixed body, and the rear end is used to connect to the front of the belt conveyor; alternatively, the front end of the extended boom is used to connect to the front of the belt conveyor, and the rear end of the extended boom is connected to the fixed body and equipped with a longitudinal movement drive device. The rear-mounted belt conveyor includes the belt conveyor body and the aforementioned belt conveyor adjustment device, and the tunneling machine includes the aforementioned rear-mounted belt conveyor. This invention achieves longitudinal and pitching movements of the rear-mounted belt conveyor through the rearward extension movement or forward extension combined with rearward longitudinal movement of the boom in the belt conveyor adjustment device. When maintenance of the main belt conveyor is required, the rear-mounted belt conveyor can be adjusted to the top, providing clearance for maintenance and improving maintenance efficiency.

Description

Technical Field

[0001] This invention belongs to the field of belt conveyor equipment, and in particular relates to a belt conveyor adjustment device, a rear-mounted belt conveyor, and a tunneling machine. Background Technology

[0002] Tunnel boring machines (TBMs) typically employ belt conveyor systems to transport excavated soil from the tunnel face. The belt conveyor system consists of a main conveyor belt and a downstream auxiliary conveyor belt. The main conveyor belt is located inside the TBM and is used to transport excavated soil from the main machine. The downstream auxiliary conveyor belt connects to the main conveyor belt and is used to transport the excavated soil out of the tunnel. The continuity and reliability of the belt conveyor system directly affect the efficiency of the TBM.

[0003] In existing technologies, the overlap position of the rear-mounted conveyor belt is usually not adjustable or has limited adjustment range. When disassembling and repairing the main conveyor belt, the rear-mounted conveyor belt must first be removed and moved backward to provide space for disassembling the main conveyor belt or transporting repair materials, resulting in low maintenance efficiency. In addition, some open-face hard rock tunnel boring machines are equipped with a muck-clearing robotic arm under the main beam or on the rear-mounted trailer, and also have a muck-clearing conveyor belt that works in conjunction with the muck-clearing robotic arm to collect the muck that falls to the bottom of the tunnel during rock breaking and transport the collected muck to the rear-mounted conveyor belt. This structure is complex and has low transportation efficiency.

[0004] Therefore, there is a need to provide a downstream belt conveyor that facilitates the maintenance of the main belt conveyor. Summary of the Invention

[0005] The purpose of this invention is to provide a belt conveyor adjustment device to solve the technical problem of low efficiency in maintaining the main belt conveyor in the prior art. Another purpose of this invention is to provide a downstream belt conveyor and a tunneling machine to solve the same technical problems described above.

[0006] To achieve the above objectives, the technical solution of the belt conveyor adjustment device provided by the present invention is as follows:

[0007] A belt conveyor adjustment device includes a fixed body and a lifting arm, wherein the lifting arm is an extended arm, and the extended arm is hinged to an extension drive device that can drive the extended arm to unfold; the front end of the extended arm is connected to the fixed body, the rear end of the extended arm is used to connect to the front of the belt conveyor, or the front end of the extended arm is used to connect to the front of the belt conveyor, and the rear end of the extended arm is connected to the fixed body and is provided with a longitudinal movement drive device.

[0008] The beneficial effects are as follows: This invention improves the traditional connection mechanism between the rear-mounted conveyor belt and the main conveyor belt. In use, the front of the conveyor belt is connected to the extension arm. When the front end of the extension arm is fixed and the rear end extends, the conveyor belt moves backward while simultaneously pitching upward, providing space for disassembly and maintenance of the main conveyor belt. When the rear end of the extension arm is connected to the fixed body and the front end extends, the longitudinal drive device is first adjusted to move backward, leaving space for the front end to extend and avoid obstructing the main conveyor belt. Then, the front end extends, driving the conveyor belt to pitch, providing space for disassembly and maintenance of the main conveyor belt. This invention, through the conveyor belt adjustment device, drives the rear-mounted conveyor belt to move back and forth and pitch, providing space for maintenance of the main conveyor belt, avoiding the need to disassemble the rear-mounted conveyor belt when maintaining the main conveyor belt, and improving maintenance efficiency.

[0009] As a further improvement, the front end of the boom is hinged to the fixed body and is provided with a bottom support cylinder, one end of which is hinged to the boom and the other end of which is hinged to the fixed body.

[0010] The beneficial effects are: the front end of the boom rotates around the hinge point, driving the belt conveyor to move up and down. When it is necessary to transport the bottom excavated soil, the boom can be adjusted to rotate downwards, placing the belt conveyor at the bottom of the tunnel, thus improving the efficiency of excavated soil transportation. In addition, it also helps to shorten the overall length of the boom, making the structure more compact.

[0011] As a further improvement, the rear end of the extender arm is slidably connected to the fixed body.

[0012] As a further improvement, the forearm of the extended arm is retractable and is equipped with a lifting cylinder, one end of which is connected to the retractable end of the forearm and the other end of which is connected to the non-retractable end of the forearm.

[0013] The beneficial effects are: the forearm extends and retracts with the lifting cylinder, driving the belt conveyor to move up and down. When it is necessary to transport the bottom excavated soil, the forearm can be adjusted to rotate downwards, placing the belt conveyor at the bottom of the tunnel, thus improving the efficiency of excavated soil transportation. In addition, it also helps to shorten the overall length of the forearm, making the structure more compact.

[0014] As a further improvement, the extension drive device is a lifting cylinder.

[0015] As a further improvement, the longitudinal movement drive device is a longitudinal movement cylinder, one end of which is connected to a fixed body and the other end is connected to the rear arm of the extension arm.

[0016] To achieve the above objectives, the technical solution for the downstream belt conveyor provided by this invention is as follows:

[0017] The rear-mounted belt conveyor includes a belt conveyor body connected to a rear belt conveyor adjustment device. The belt conveyor adjustment device includes a fixed body and a cantilever arm. The cantilever arm is an extendable arm, which is hinged to an extension drive device that can drive the extendable arm to unfold. The front end of the extendable arm is connected to the fixed body, and the rear end of the extendable arm is used to connect to the front of the belt conveyor, or the front end of the extendable arm is used to connect to the front of the belt conveyor. The rear end of the extendable arm is connected to the fixed body and is provided with a longitudinal movement drive device.

[0018] The beneficial effects are as follows: This invention improves the traditional connection mechanism between the rear-mounted conveyor belt and the main conveyor belt. In use, the front of the conveyor belt is connected to the extension arm. When the front end of the extension arm is fixed and the rear end extends, the conveyor belt moves backward while simultaneously pitching upward, providing space for disassembly and maintenance of the main conveyor belt. When the rear end of the extension arm is connected to the fixed body and the front end extends, the longitudinal drive device is first adjusted to move backward, leaving space for the front end to extend and avoid obstructing the main conveyor belt. Then, the front end extends, driving the conveyor belt to pitch, providing space for disassembly and maintenance of the main conveyor belt. This invention, through the conveyor belt adjustment device, drives the rear-mounted conveyor belt to move back and forth and pitch, providing space for maintenance of the main conveyor belt, avoiding the need to disassemble the rear-mounted conveyor belt when maintaining the main conveyor belt, and improving maintenance efficiency.

[0019] As a further improvement, the front end of the boom is hinged to the fixed body and is provided with a bottom support cylinder, one end of which is hinged to the boom and the other end of which is hinged to the fixed body.

[0020] The beneficial effects are: the front end of the boom rotates around the hinge point, driving the belt conveyor to move up and down. When it is necessary to transport the bottom excavated soil, the boom can be adjusted to rotate downwards, placing the belt conveyor at the bottom of the tunnel, thus improving the efficiency of excavated soil transportation. In addition, it also helps to shorten the overall length of the boom, making the structure more compact.

[0021] As a further improvement, the rear end of the extender arm is slidably connected to the fixed body.

[0022] As a further improvement, the forearm of the extended arm is retractable and is equipped with a lifting cylinder, one end of which is connected to the retractable end of the forearm and the other end of which is connected to the non-retractable end of the forearm.

[0023] The beneficial effects are: the forearm extends and retracts with the lifting cylinder, driving the belt conveyor to move up and down. When it is necessary to transport the bottom excavated soil, the forearm can be adjusted to rotate downwards, placing the belt conveyor at the bottom of the tunnel, thus improving the efficiency of excavated soil transportation. In addition, it also helps to shorten the overall length of the forearm, making the structure more compact.

[0024] As a further improvement, the extension drive device is a lifting cylinder.

[0025] As a further improvement, the longitudinal movement drive device is a longitudinal movement cylinder, one end of which is connected to a fixed body and the other end is connected to the rear arm of the extension arm.

[0026] To achieve the above objectives, the technical solution for the tunneling machine provided by this invention is as follows:

[0027] The tunneling machine includes a main conveyor belt and a rear-mounted trailer. The rear-mounted trailer is equipped with a rear-mounted conveyor belt, which includes a conveyor body. The conveyor body is connected to a rear conveyor belt adjustment device. The conveyor belt adjustment device includes a fixed body and a boom. The boom is a telescopic boom, which is hinged to an extension drive device that can drive the boom to extend. The front end of the boom is connected to the fixed body, and the rear end of the boom is used to connect to the front of the conveyor belt, or the front end of the boom is used to connect to the front of the conveyor belt. The rear end of the boom is connected to the fixed body and is equipped with a longitudinal movement drive device.

[0028] The beneficial effects are as follows: This invention improves the traditional connection mechanism between the rear-mounted conveyor belt and the main conveyor belt. In use, the front of the conveyor belt is connected to the extension arm. When the front end of the extension arm is fixed and the rear end extends, the conveyor belt moves backward while simultaneously pitching upward, providing space for disassembly and maintenance of the main conveyor belt. When the rear end of the extension arm is connected to the fixed body and the front end extends, the longitudinal drive device is first adjusted to move backward, leaving space for the front end to extend and avoid obstructing the main conveyor belt. Then, the front end extends, driving the conveyor belt to pitch, providing space for disassembly and maintenance of the main conveyor belt. This invention, through the conveyor belt adjustment device, drives the rear-mounted conveyor belt to move back and forth and pitch, providing space for maintenance of the main conveyor belt, avoiding the need to disassemble the rear-mounted conveyor belt when maintaining the main conveyor belt, and improving maintenance efficiency.

[0029] As a further improvement, the front end of the boom is hinged to the fixed body and is provided with a bottom support cylinder, one end of which is hinged to the boom and the other end of which is hinged to the fixed body.

[0030] The beneficial effects are: the front end of the boom rotates around the hinge point, driving the belt conveyor to move up and down. When it is necessary to transport the bottom excavated soil, the boom can be adjusted to rotate downwards, placing the belt conveyor at the bottom of the tunnel, thus improving the efficiency of excavated soil transportation. In addition, it also helps to shorten the overall length of the boom, making the structure more compact.

[0031] As a further improvement, the rear end of the extender arm is slidably connected to the fixed body.

[0032] As a further improvement, the forearm of the extended arm is retractable and is equipped with a lifting cylinder, one end of which is connected to the retractable end of the forearm and the other end of which is connected to the non-retractable end of the forearm.

[0033] The beneficial effects are: the forearm extends and retracts with the lifting cylinder, driving the belt conveyor to move up and down. When it is necessary to transport the bottom excavated soil, the forearm can be adjusted to rotate downwards, placing the belt conveyor at the bottom of the tunnel, thus improving the efficiency of excavated soil transportation. In addition, it also helps to shorten the overall length of the forearm, making the structure more compact.

[0034] As a further improvement, the extension drive device is a lifting cylinder.

[0035] As a further improvement, the longitudinal movement drive device is a longitudinal movement cylinder, one end of which is connected to a fixed body and the other end is connected to the rear arm of the extension arm. Attached Figure Description

[0036] Figure 1 This is a front view of embodiment 1 of the tunneling machine in this invention and a schematic diagram of the position of the rear-mounted belt conveyor in the tunneling mode;

[0037] Figure 2 This is a side view of embodiment 1 of the tunneling machine in this invention;

[0038] Figure 3 This is a schematic diagram showing the position of the rear-mounted belt conveyor in the slag-cleaning state of the tunneling machine in Embodiment 1 of the present invention;

[0039] Figure 4 This is a schematic diagram showing the position of the rear conveyor belt of the tunneling machine in the yielding state in Embodiment 1 of the present invention;

[0040] Figure 5 This is a front view of embodiment 2 of the tunneling machine in this invention and a schematic diagram of the position of the rear-mounted belt conveyor in the tunneling mode;

[0041] Figure 6 This is a schematic diagram showing the position of the rear-mounted belt conveyor in the slag-cleaning state of the tunneling machine in Embodiment 2 of the present invention;

[0042] Figure 7 This is a schematic diagram of the position I of the rear-mounted belt conveyor in the yielding state of embodiment 2 of the present invention;

[0043] Figure 8 This is a schematic diagram of the position II of the rear belt conveyor when the tunneling machine in Embodiment 2 of the present invention is in the yielding state.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Support beam; 2. Front arm; 3. Lifting cylinder; 4. Rear arm; 5. Base support cylinder; 6. Support rod; 7. Rear-mounted conveyor body; 8. Rear-mounted trailer; 9. Main conveyor belt; 10. Clearance space; 11. Longitudinal movement cylinder; 12. Lifting cylinder. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the process or method that includes said element.

[0049] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0051] The present invention will be further described in detail below with reference to the embodiments.

[0052] Specific embodiment 1 of the tunneling machine provided by the present invention:

[0053] The tunneling machine implementation provided in this embodiment is, for example... Figure 1 and Figure 2 As shown, the system includes a tunneling machine main unit and a supporting system. The tunneling machine main unit is equipped with a main unit conveyor belt 9, and the supporting system includes a supporting trailer 8. The main unit conveyor belt 9 and the supporting trailer 8 are common knowledge in the art and will not be described in detail here. The supporting trailer 8 is equipped with a supporting trailer belt body 7. The supporting trailer belt body 7 is connected to the supporting trailer 8 or the frame of the main unit conveyor belt 9 through a conveyor belt adjustment device, thereby achieving overlap with the main unit conveyor belt 9.

[0054] In this embodiment, the belt conveyor adjustment device comprises a support beam 1, a cantilever arm, an extension drive device, a bottom support cylinder 5, and a support rod 6. Specifically, the cantilever arm is an extended arm formed by a hinged front arm 2 and a rear arm 4. The extension drive device is a lifting cylinder 3, with both ends of the lifting cylinder 3 hinged to the front arm 2 and the rear arm 4, respectively. Its telescopic movement can drive the extension action of the extended arm. The front end of the front arm 2 is hinged to the support beam 1, and the rear end of the rear arm 4 is provided with a support rod 6. The support beam 1 can be fixedly connected to the frame of the rear-mounted trailer 8 or the main belt conveyor 9 to form a fixed body in the belt conveyor adjustment device. In this embodiment, the support beam is fixedly connected to the frame of the main belt conveyor 9, and its specific structure and connection position are not limited. The support rod 6 is used to connect to the front part of the rear-mounted belt conveyor body 7, and its specific structure is also not limited. The front arm 2 is also hinged to a bottom support cylinder 5, and the other end of the bottom support cylinder 5 is hinged to the support beam 1. A stable triangular structure is formed between the bottom support cylinder 5, the front arm 2, and the support beam 1.

[0055] The working principle of the belt conveyor adjustment device in Example 1:

[0056] When the tunneling machine is tunneling and excavating muck normally, such as Figure 1 As shown, the lifting cylinder 3 retracts, the bottom support cylinder 5 supports the forearm 2, and the rear-mounted belt conveyor body 7 is in the normal overlapping position with the main belt conveyor 9; when the tunneling machine is in the slag removal state, as Figure 3 As shown, the bottom support cylinder 5 retracts, and the front arm 2 rotates downward, moving the rear-mounted belt conveyor body 7 to the bottom of the tunnel to meet the needs of bottom debris removal and transportation; when the main belt conveyor 9 needs maintenance, as... Figure 4 As shown, the bottom support cylinder 5 supports the front arm 2, the lifting cylinder 3 extends, and drives the rear arm 2 to extend backward, which in turn drives the rear matching belt conveyor body 7 to move longitudinally backward and pitch, providing clearance 10 for the main belt conveyor 9 to be disassembled for maintenance or to transport maintenance materials, thus improving maintenance efficiency.

[0057] The specific embodiment 2 of the tunneling machine provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the forearm 2 is hinged to the support beam 1, and the rear arm 4 is provided with a strut 6. In this embodiment, as... Figure 5 As shown, the forearm 2 is equipped with a support rod 6, and the rear arm 4 is slidably connected to the rear trailer 8 and is equipped with a longitudinal movement cylinder 11. One end of the longitudinal movement cylinder is connected to the rear arm 4, and the other end is connected to the rear trailer 8. The rear trailer 8 forms the fixed body of the belt conveyor adjustment device. The longitudinal movement cylinder 11 can drive the rear arm 4 to slide longitudinally along the rear trailer 8. The forearm 2 is telescopic and is equipped with a lifting cylinder 12. One end of the lifting cylinder 12 is connected to the non-telescopic end of the forearm 2, and the other end is connected to the telescopic end of the forearm 2. The telescopic movement of the lifting cylinder 12 can drive the support rod 6 to move up and down.

[0058] The working principle of the belt conveyor adjustment device in Example 2:

[0059] When the tunneling machine is tunneling and excavating muck normally, such as Figure 5 As shown, the lifting cylinder 3 retracts, the hoisting cylinder 12 extends, and the rear-mounted belt conveyor body 7 is in the normal overlapping position with the main belt conveyor 9; when the tunneling machine is in the slag removal state, as Figure 6 As shown, the lifting cylinder 12 continues to extend, while the longitudinal displacement cylinder 11 extends and retracts a certain distance, moving the rear-mounted belt conveyor body 7 down to the bottom of the tunnel to meet the needs of bottom cleaning and transportation; when it is necessary to maintain the main belt conveyor 9, as Figure 7 and Figure 8 As shown, the longitudinal cylinder 11 continues to extend and retract backward, while the lifting cylinder 12 retracts to shorten the length of the forearm 2. At the same time, the lifting cylinder 3 extends, the forearm 2 extends forward, and the supporting belt conveyor body 7 moves upward after being lifted, providing space for the main belt conveyor 9 to be disassembled for maintenance or to transport maintenance materials.

[0060] The specific embodiment 3 of the tunneling machine provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the forearm 2 is hinged to the support beam 1 and is equipped with a bottom support cylinder 5. In this embodiment, the forearm is fixedly connected to the support beam, and its position remains horizontal. At this time, when the rear arm extends backward, the rear-mounted belt conveyor can still move backward and pitch.

[0061] The specific embodiment 4 of the tunneling machine provided by this invention differs from embodiment 2 mainly in that: in embodiment 1, the rear boom 4 is slidably connected to the rear trailer 8. In this embodiment, the rear boom is telescopic, and the longitudinal hydraulic cylinder can drive the telescopic movement of the rear boom, thereby realizing the forward and backward movement of the rear belt conveyor.

[0062] The specific embodiment 5 of the tunneling machine provided by the present invention differs from embodiments 1 and 2 mainly in that: in embodiments 1 and 2, the extension drive device is a lifting hydraulic cylinder 3. In this embodiment, the extension drive device is a pneumatic cylinder.

[0063] The specific embodiment 6 of the tunneling machine provided by the present invention differs from embodiment 2 mainly in that: in embodiment 2, the longitudinal movement drive device is a longitudinal movement cylinder 11. In this embodiment, the longitudinal movement drive device is a winch mechanism located on the rear-mounted trailer.

[0064] Specific embodiments of the belt conveyor adjustment device of the present invention:

[0065] The embodiment of the belt conveyor adjustment device is the belt conveyor adjustment device described in any of the embodiments 1 to 6 of the tunneling machine described above, and will not be described in detail here.

[0066] Specific embodiments of the rear-mounted belt conveyor in this invention:

[0067] The rear-mounted belt conveyor includes the rear-mounted belt conveyor body and belt conveyor adjustment device described in any of the embodiments 1 to 6 of the above-mentioned tunneling machine, which will not be specifically described here.

[0068] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A belt conveyor adjustment device, characterized in that, The fixed body and the cantilevered arm are formed by the hinged front arm and rear arm, and the cantilevered arm is hinged with the stretching driving device capable of driving the cantilevered arm to stretch out; the cantilevered arm is used to connect the rear matched belt conveyor, and the cantilevered arm, the fixed body and the rear matched belt conveyor have the following two connection modes: ① the front end of the cantilevered arm is connected with the fixed body, the rear end of the cantilevered arm is used to connect with the front part of the rear matched belt conveyor, the rear matched belt conveyor is driven to move backward and swing upward by the stretching driving device, so as to provide the space for the main machine belt conveyor to be disassembled and repaired or to transport and repair the materials; ② the front end of the cantilevered arm is used to connect with the front part of the rear matched belt conveyor, the rear end of the cantilevered arm is connected with the fixed body and is provided with the longitudinal movement driving device, the front arm is telescopic and is connected with the lifting oil cylinder, the two ends of the lifting oil cylinder are connected with the telescopic end and the non-telescopic end of the front arm, the rear matched belt conveyor is driven to move backward by the longitudinal movement driving device, the front arm is driven to stretch forward by the stretching driving device, the front arm is driven to lift up by the lifting oil cylinder, so as to provide the space for the main machine belt conveyor to be disassembled and repaired or to transport and repair the materials.

2. The belt conveyor adjustment device of claim 1, wherein, For mode ①, the front end of the cantilevered arm is hinged with the fixed body and is provided with the bottom support oil cylinder, one end of the bottom support oil cylinder is hinged with the front arm of the cantilevered arm, and the other end is hinged with the fixed body, so as to drive the front arm to swing up and down by the bottom support oil cylinder.

3. The belt conveyor adjustment device of claim 1, wherein, For mode ②, the rear arm of the cantilevered arm is slidingly connected with the fixed body, the longitudinal movement driving device is the longitudinal movement oil cylinder, one end of the longitudinal movement oil cylinder is connected with the fixed body, and the other end is connected with the rear arm of the cantilevered arm.

4. The belt conveyor adjustment device of claim 1, wherein, For modes ① and ②, the stretching driving device is the lifting oil cylinder.

5. A rear matching belt conveyor comprising a belt conveyor body, characterized in that, The belt conveyor body is connected with the belt conveyor adjusting device, the belt conveyor adjusting device includes the fixed body and the cantilevered arm, the cantilevered arm is the stretching arm formed by the hinged front arm and rear arm, the stretching arm is hinged with the stretching driving device capable of driving the stretching arm to stretch out; the stretching arm, the fixed body and the belt conveyor body have the following two connection modes: ① the front end of the stretching arm is connected with the fixed body, the rear end of the stretching arm is connected with the front part of the belt conveyor body, the belt conveyor body is driven to move backward and swing upward by the stretching driving device, so as to provide the space for the main machine belt conveyor to be disassembled and repaired or to transport and repair the materials; ② the front end of the stretching arm is connected with the front part of the belt conveyor body, the rear end of the stretching arm is connected with the fixed body and is provided with the longitudinal movement driving device, the front arm is telescopic and is connected with the lifting oil cylinder, the two ends of the lifting oil cylinder are connected with the telescopic end and the non-telescopic end of the front arm, the belt conveyor body is driven to move backward by the longitudinal movement driving device, the front arm is driven to stretch forward by the stretching driving device, the front arm is driven to lift up by the lifting oil cylinder, so as to provide the space for the main machine belt conveyor to be disassembled and repaired or to transport and repair the materials.

6. The tailer grommet as claimed in claim 5, wherein, For mode ①, the front end of the stretching arm is hinged with the fixed body and is provided with the bottom support oil cylinder, one end of the bottom support oil cylinder is hinged with the front arm of the stretching arm, and the other end is hinged with the fixed body, so as to drive the front arm to swing up and down by the bottom support oil cylinder.

7. The tail-belt conveyor according to claim 5, characterized in that For mode ②, the rear arm of the stretching arm is slidingly connected with the fixed body, the longitudinal movement driving device is the longitudinal movement oil cylinder, one end of the longitudinal movement oil cylinder is connected with the fixed body, and the other end is connected with the rear arm of the stretching arm.

8. The tail-belt conveyor according to claim 5, characterized in that For modes ① and ②, the stretching driving device is the lifting oil cylinder.

9. A roadheader comprising a main machine and a rearwardly coupled trailer, characterised in that, The rear matching trailer is provided with a rear matching belt conveyor, which comprises a belt conveyor body connected with a belt conveyor adjusting device, the belt conveyor adjusting device comprising a fixed body and a cantilevered arm, the cantilevered arm being an extended arm formed by a hinged front arm and a hinged rear arm, and the extended arm being hinged with an extension driving device capable of driving the extended arm to extend; the extended arm, the fixed body and the belt conveyor body are connected in the following two ways: ① the front end of the extended arm is connected with the fixed body, and the rear end of the extended arm is connected with the front part of the belt conveyor body; the rear arm is driven to extend by the extension driving device, so that the belt conveyor body moves backward and swings upward, thereby providing a space for the main belt conveyor to be disassembled, repaired or transported; ② the front end of the extended arm is connected with the front part of the belt conveyor body, and the rear end of the extended arm is connected with the fixed body and provided with a longitudinal movement driving device; the front arm is telescopic and connected with a lifting oil cylinder, the two ends of the lifting oil cylinder being connected with the telescopic end and the non-telescopic end of the front arm; the rear arm is driven to move backward by the longitudinal movement driving device, the front arm is driven to extend forward by the extension driving device, and the front arm is driven to lift up by the lifting oil cylinder, so that the belt conveyor body moves backward and swings upward, thereby providing a space for the main belt conveyor to be disassembled, repaired or transported.

10. A heading machine according to claim 9, characterised in that For mode ①, the front end of the extended arm is hinged with the fixed body and provided with a bottom support oil cylinder, one end of the bottom support oil cylinder being hinged with the front arm of the extended arm, and the other end being hinged with the fixed body, so as to drive the front arm to swing up and down by the bottom support oil cylinder.

11. A heading machine according to claim 9, characterised in that For mode ②, the rear arm of the extended arm is slidingly connected with the fixed body, and the longitudinal movement driving device is a longitudinal movement oil cylinder, one end of the longitudinal movement oil cylinder being connected with the fixed body, and the other end being connected with the rear arm of the extended arm.

12. The heading machine of claim 9, wherein, For modes ① and ②, the extension driving device is a lifting oil cylinder.

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