Machine-mounted temporary supporting device of heading machine

Abstract

The invention belongs to the technical field of coal mine heading machine onboard temporary supporting equipment, and particularly relates to a heading machine onboard temporary supporting device. The cutting part comprises a cutting part rack, a parallelogram turnover mechanism arranged in the middle of the cutting part rack, a turnover oil cylinder for driving the parallelogram turnover mechanism, a bearing platform, a telescopic mechanical arm assembly and a protective plate assembly, the bearing platform is connected to the cutting part rack through a parallelogram turnover mechanism and is driven by a turnover oil cylinder to horizontally lift and translate, one end of the mechanical arm assembly is connected to the bearing platform, and an angle adjusting mechanism is arranged between the mechanical arm assembly and the bearing platform; the guard plate assembly is installed at the other end of the mechanical arm assembly, and a leveling mechanism is arranged between the guard plate assembly and the mechanical arm assembly. According to the invention, the original onboard temporary support overturning structure of the heading machine is broken through, and the parallelogram four-connecting-rod translation mechanism is innovatively designed, so that the translation mechanism can be normally used in a low roadway, and the effect of increasing the practical performance is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine roadheader-mounted temporary support equipment, and in particular relates to a roadheader-mounted temporary support device. Background Art

[0002] At present, in the tunnel construction of coal mines and various non-coal mines, low tunnel construction is increasing. The traditional temporary support onboard the tunnel boring machine is a rear-flip type from the folded and retracted state to the open working state. The flipping height is high and requires a large space, so it cannot be used in low tunnels. Therefore, in order to solve the above problems, it is particularly important to design a temporary support device onboard the tunnel boring machine suitable for low tunnels. Summary of the Invention

[0003] Based on the above problems, the present invention provides a temporary support device onboard a tunnel boring machine, which breaks the original temporary support flipping structure onboard the tunnel boring machine and innovatively designs a parallelogram four-bar translation mechanism, so that it can be used normally in low tunnels, thereby increasing its practical performance.

[0004] In order to solve the above-mentioned technical problems, the present invention provides an onboard temporary support device for a tunnel boring machine, which is characterized in that it includes a cutting part frame, a parallelogram flipping mechanism arranged in the middle of the cutting part frame, a flipping cylinder driving the parallelogram flipping mechanism, a carrying platform, a retractable mechanical arm assembly and a guard plate assembly. The carrying platform is connected to the cutting part frame through the parallelogram flipping mechanism and is horizontally lifted and translated under the drive of the flipping cylinder. One end of the mechanical arm assembly is connected to the carrying platform and an angle adjustment mechanism is arranged between it. The guard plate assembly is installed at the other end of the mechanical arm assembly and a leveling mechanism is arranged between it.

[0005] Furthermore, the parallelogram flipping mechanism specifically includes a front rocker, a rear rocker and a translation link. The middle parts of the front and rear sides of the cutting unit frame are respectively connected with the front rocker and the rear rocker, and one end of the front rocker and the rear rocker are connected to the cutting unit frame through a fixed hinge pin. The cutting unit frame serves as the fixed side of the parallelogram flipping mechanism, and the other end of the front rocker and the rear rocker on the same side are connected through a translation link. Both ends of the translation link are connected to the front rocker and the rear rocker through a movable hinge pin. A flip cylinder is installed on the front and rear sides of the rear end of the cutting unit frame, and the flip cylinder is movably connected to the cutting unit frame and its output shaft end is connected to the rear rocker. The bearing platform is horizontally fixed between the translation links on the front and rear sides and performs translation movement together with the translation link.

[0006] Furthermore, the angle adjustment mechanism includes a secondary four-bar linkage and an adjustment cylinder arranged on the supporting platform. An adjustment cylinder is also arranged on the left and right sides of the robotic arm assembly. The adjustment cylinder is movably installed on the top of the rear end of the supporting platform. The output shaft end of the adjustment cylinder is connected to the robotic arm assembly through the secondary four-bar linkage. The robotic arm assembly adjusts its angle through the control of the adjustment cylinder and in cooperation with the secondary four-bar linkage.

[0007] Furthermore, the secondary four-bar linkage is composed of two connecting rods and two rocker arms. A connecting rod and a rocker arm are respectively provided on the left and right sides of the robotic arm assembly. One end of the connecting rod is movably connected to the carrying platform, and one end of the two rocker arms are respectively movably connected to the two sides of the robotic arm assembly and connected to each other through connecting parts. The adjusting cylinder is connected to the other end of the connecting rod on the same side and the other end of the rocker arm through the connecting hinge pin.

[0008] Furthermore, the robotic arm assembly is composed of an inner arm, an outer arm and a telescopic cylinder. One end of the outer arm is connected to the load-bearing platform through a platform connection hinge pin. One end of the inner arm extends from the other end of the outer arm into the interior of the outer arm and is connected to the telescopic cylinder arranged in the outer arm. The output shaft end of the telescopic cylinder extends into the inner arm and is fixedly connected to it. The guard plate assembly is installed on the other end of the inner arm.

[0009] Furthermore, the leveling assembly includes a rotating cylinder for front and rear leveling and a spring assembly for lateral leveling. The guard plate assembly includes a guard plate upper bracket, a mounting plate fixed in the guard plate bracket, a connecting plate and a protective upper crossbeam. The protective upper crossbeam is connected to one side of the guard plate bracket through a telescopic assembly. The rotating cylinder is fixed on the mounting plate, and its output shaft is connected to the inner arm through a connecting plate. A spring assembly for lateral adaptive leveling is arranged between the connecting plate and the inner arm.

[0010] Furthermore, the telescopic assembly includes a guide frame and a telescopic frame fixed to the bottom of the front and rear ends of the bracket on the guard plate. The guide frame is provided with a guide groove matching the telescopic frame at one end facing the protective upper crossbeam. The guide groove is rectangular, and the cross-section of the telescopic frame is an inverted L-shape. One end of the telescopic frame extends into the guide groove and is connected to the output shaft of the rotary cylinder through a transmission mechanism. The bottom of the upper end of the telescopic frame is provided with a tooth structure connected to the transmission mechanism.

[0011] Furthermore, the transmission mechanism includes a first transmission gear, a transition gear, a second transmission gear, a transmission shaft and a driving gear. The first transmission gear is installed on the output shaft of the rotating cylinder and meshes with a transition gear arranged on the inner wall of a guide frame. A transmission shaft is also horizontally rotatably connected between the two guide frames. The first transmission gear is connected to the second transmission gear mounted on the transmission shaft through the transition gear. The two ends of the transmission shaft respectively extend into the guide grooves of the two guide frames and are each fixedly connected to a driving gear. The driving gear meshes with the tooth structure on the telescopic frame.

[0012] Furthermore, the tilting oil cylinder is connected to the mounting seat movably connecting piece through the cylinder mounting seat, the mounting seat movably connecting piece is connected to the side wall of the cutting part frame through a connecting shaft, and a locking gear is mounted on the connecting shaft, and a connecting seat is also installed on the side wall of the cutting part frame, and the connecting seat is provided with a second guide groove matching the locking block on the side facing the locking gear, the locking block is movably connected in the second guide groove and is connected to the switch hydraulic cylinder arranged on the connecting seat, and the locking block is provided with an arc groove on the side facing the locking gear, and a locking tooth structure matching the locking gear is provided on the inner wall of the arc groove, and a conductive sheet is fixed on the side of the locking block away from the locking gear, and the conductive sheet is connected to the control circuit and the power supply circuit arranged in the second guide groove through the drive of the switch hydraulic cylinder, the power supply circuit is electrically connected to the control circuit through the conductive sheet, and the control circuit is electrically connected to the rotating oil cylinder, the adjusting oil cylinder and the tilting oil cylinder respectively.

[0013] The present invention also provides an operating method of a temporary support device mounted on a roadheader, which specifically comprises the following steps: S1: The entire temporary support device in the folded and retracted state is translated and flipped to the front side of the cutting part through the flipping cylinder and the parallelogram linkage mechanism; S2: By adjusting the oil cylinder and the secondary four-bar linkage, the arm is raised to the required angle for construction; S3: Adjust the extension length of the inner arm through the telescopic cylinder; S4: The angle of the guard plate assembly is adjusted by rotating the oil cylinder to adapt to the front and rear slopes of the tunnel roof. At the same time, the guard plate assembly adapts to the lateral angle of the tunnel roof under the action of the spring assembly.

[0014] After adopting the above structure, the technical advantage of the tunnel boring machine airborne temporary support device in the present invention compared with the existing technology is that it can better adapt to the space requirements of thin coal seams and low tunnels, and replace the original support's higher flipping height space requirement from back to front with a lower translation height of the entire set of support devices from back to front, making it possible to install airborne temporary support on tunnel boring machines in the construction of such tunnels, thereby better protecting the safety of tunnel head-on workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a structural schematic diagram of the present invention during the development process.

[0017] Figure 2 This is a schematic diagram of the structure of the present invention when it is in normal use.

[0018] Figure 3 It is a schematic structural diagram of the present invention when it is folded.

[0019] Figure 4 This is a top view of the guard plate assembly.

[0020] Figure 5 This is a diagram of the internal structure of the telescopic component.

[0021] Figure 6 Schematic diagram of the connection between the locking gear and the locking block.

[0022] In the figure: 1 is the cutting part frame, 2 is the tilting cylinder, 3 is the dynamic hinge pin, 4 is the rear rocker, 5 is the fixed hinge pin, 6 is the front rocker, 9 is the guard plate assembly, 9-1 is the bracket on the guard plate, 9-2 is the guide frame, 9-3 is the telescopic frame, 9-4 is the protective upper crossbeam, 9-5 is the mounting plate, 9-6 is the rotating cylinder, 9-7 is the first transmission gear, 9-8 is the transition gear, 9-9 is the drive gear, 9-10 is the tooth structure, 9-11 are connecting plates, 10 is the inner arm, 11 is the translation connecting rod, 12 is the rocker arm, 13 is the outer arm, 14 is the connecting rod, 15 is the connecting hinge pin, 16 is the telescopic cylinder, 17 is the bearing platform, 18 is the platform connecting hinge pin, 19 is the adjustment cylinder, 20 is the cylinder mounting seat, 21 is the mounting seat movable connecting part, 22 is the connecting shaft, 23 is the locking gear, 24 is the connecting seat, 25 is the locking block, and 26 is the switch hydraulic cylinder. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0025] like Figure 1 、 Figure 2 and Figure 3 The illustrated embodiment of an onboard temporary support device for a roadheader comprises a cutting section frame 1, a parallelogram-shaped flipping mechanism disposed in the middle of the cutting section frame 1, a flipping cylinder 2 for driving the parallelogram-shaped flipping mechanism, a supporting platform 17, a retractable mechanical arm assembly, and a guard plate assembly 9. The supporting platform is connected to the cutting section frame via the parallelogram-shaped flipping mechanism and is driven by the flipping cylinder to be raised and lowered and translated horizontally. One end of the mechanical arm assembly is connected to the supporting platform 17, with an angle adjustment mechanism disposed therebetween. The guard plate assembly is mounted on the other end of the mechanical arm assembly, with a leveling mechanism disposed therebetween. The technical advantage of the onboard temporary support device for a roadheader in the present invention over the prior art lies in its ability to better accommodate the spatial requirements of thin coal seams and low roadways. The lower translational height of the entire support device from back to front replaces the higher rotational height required by the original support device from back to front, making it possible to install onboard temporary support devices for roadheaders in such tunnels, thereby better protecting the safety of personnel working at the head of the tunnel.

[0026] like Figure 1 and Figure 2 The parallelogram flip mechanism shown specifically includes a front rocker 6, a rear rocker 4, and a translation link 11. The front and rear rockers are connected to the cutting unit frame at the center of the front and rear sides, one in front of the other. One end of each of the front and rear rockers is connected to the cutting unit frame via a fixed hinge pin 5. The cutting unit frame serves as the fixed side of the parallelogram flip mechanism. The other ends of the front and rear rockers on the same side are connected by a translation link. Both ends of the translation link are connected to the front and rear rockers via a movable hinge pin 3. A flip cylinder is installed on each side of the rear end of the cutting unit frame. The flip cylinder is movably connected to the cutting unit frame and its output shaft end is connected to the rear rocker. The load-bearing platform is horizontally fixed between the front and rear translation links and moves translationally with the translation links. After adopting the above structure, the present invention can be kept in a folded, non-expanded state at the beginning, so only a relatively low roadway space is required to achieve the overall translation movement. The invention innovatively designs a parallelogram four-link translation mechanism, which enables it to be used normally in low lanes, thus increasing its practical performance. like Figure 1 and Figure 2 The angle adjustment mechanism shown includes a secondary four-bar linkage and an adjustment cylinder 19 provided on the carrying platform. An adjustment cylinder is also provided on each side of the left and right sides of the robotic arm assembly. The adjustment cylinder is movably mounted on the top rear end of the carrying platform. The output shaft end of the adjustment cylinder is connected to the robotic arm assembly via the secondary four-bar linkage. The robotic arm assembly adjusts its angle under the control of the adjustment cylinder and in cooperation with the secondary four-bar linkage. The present invention installs a secondary four-bar linkage on the carrying platform 17, which changes the size of the angle between the robotic arm assembly and the carrying platform 17 when the adjustment cylinder 19 is actuated. Another function of the secondary four-bar linkage here is to achieve large-angle lifting and lowering of the outer arm 13 with a smaller stroke of the adjustment cylinder 19, thereby enabling it to be deployed even in low alleys.

[0027] like Figure 1 and Figure 2 The secondary four-bar linkage is composed of two connecting rods 14 and two rocker arms 12. A connecting rod and a rocker arm are provided on each side of the robotic arm assembly. One end of the connecting rod is movably connected to the support platform. One end of the two rocker arms is movably connected to the two sides of the robotic arm assembly and connected to each other via connectors. The adjustment cylinder is connected to the other end of the connecting rod on the same side and the other end of the rocker arm via a connecting hinge pin 15. The present invention utilizes a secondary four-bar linkage mechanism in which a small linear displacement of the hinge points on two sides can result in a large angular displacement of the third side relative to the fixed side.

[0028] like Figure 1 and Figure 2 The illustrated robotic arm assembly consists of an inner arm 10, an outer arm 13, and a telescopic cylinder 16. One end of the outer arm is connected to the support platform via a platform connection hinge pin 18. One end of the inner arm extends from the other end of the outer arm into the outer arm and connects to the telescopic cylinder located within the outer arm. The output shaft of the telescopic cylinder extends into the inner arm and is fixedly connected thereto. The guard plate assembly is mounted on the other end of the inner arm. Driven by the telescopic cylinder 16, the inner arm 10 can move axially along the outer arm, thereby compensating for the length of the telescopic arm and, in conjunction with changes in the arm elevation angle, moving the guard plate 9 to an appropriate fore-aft distance from the front.

[0029] like Figure 4The leveling assembly shown includes a rotating cylinder 9-6 for front-to-back leveling and a spring assembly for lateral leveling. The guard plate assembly includes a guard plate upper bracket 9-1, a mounting plate 9-5 secured within the guard plate bracket 9-1, a connecting plate 9-11, and a protective upper crossbeam 9-4. The protective upper crossbeam is connected to one side of the guard plate bracket via a telescoping assembly. The rotating cylinder is secured to the mounting plate, and its output shaft is connected to the inner arm via a connecting plate. A spring assembly for lateral adaptive leveling is disposed between the connecting plate and the inner arm. The present invention uses a rotating cylinder to adjust the longitudinal alignment of the guard plate assembly with the roadway roof, and uses a spring assembly to adjust the lateral slope of the guard plate assembly to the roadway roof.

[0030] like Figure 4 and Figure 5 The telescopic assembly shown includes a guide frame 9-2 and a telescopic frame 9-3 fixed to the bottom of the front and rear ends of the bracket on the guard plate. The guide frame is provided with a guide groove matching the telescopic frame at one end facing the protective upper crossbeam. The guide groove is rectangular, and the cross-section of the telescopic frame is an inverted L-shape. One end of the telescopic frame extends into the guide groove and is connected to the output shaft of the rotary cylinder through a transmission mechanism. The bottom of the upper end of the telescopic frame is provided with a tooth structure 9-10 connected to the transmission mechanism.

[0031] like Figure 5 The transmission mechanism shown includes a first transmission gear 9-7, a transition gear 9-8, a second transmission gear, a transmission shaft and a drive gear 9-9. The first transmission gear is mounted on the output shaft of the rotary cylinder and meshes with a transition gear arranged on the inner wall of a guide frame. A transmission shaft is also horizontally rotatably connected between the two guide frames. The first transmission gear is connected to the second transmission gear mounted on the transmission shaft through the transition gear. The two ends of the transmission shaft respectively extend into the guide grooves of the two guide frames and are fixedly connected to a drive gear. The drive gear meshes with the tooth structure on the telescopic frame.

[0032] like Figure 6The tilting cylinder shown is connected to the mounting seat movable connection part 21 through the cylinder mounting seat 20, and the mounting seat movable connection part is connected to the side wall of the cutting part frame through the connecting shaft 22. The connecting shaft is provided with a locking gear 23. A connecting seat 24 is also installed on the side wall of the cutting part frame. The connecting seat is provided with a second guide groove matching the locking block 25 on the side facing the locking gear. The locking block is movably connected in the second guide groove and is connected to the switch hydraulic cylinder 26 arranged on the connecting seat. The locking block is provided with an arc groove on the side facing the locking gear, and a locking tooth structure matching the locking gear is provided on the inner wall of the arc groove. A conductive sheet is fixed on the side of the locking block away from the locking gear. The conductive sheet is connected to the control circuit and the power supply circuit arranged in the second guide groove through the drive of the switch hydraulic cylinder. The power supply circuit is electrically connected to the control circuit through the conductive sheet, and the control circuit is electrically connected to the rotating cylinder, the adjusting cylinder and the tilting cylinder respectively. The present invention adopts the above-mentioned structure to lock the rotating cylinder, adjusting cylinder and flipping cylinder. Only after starting the switch hydraulic cylinder to connect the conductive plate with the control circuit and the power supply circuit can the rotating cylinder, adjusting cylinder and flipping cylinder be controlled to prevent unnecessary losses due to operational errors.

[0033] The present invention also provides an operating method of a temporary support device mounted on a roadheader, which specifically comprises the following steps: S1: The entire temporary support device in the folded and retracted state is translated and flipped to the front side of the cutting part through the flipping cylinder and the parallelogram linkage mechanism; S2: By adjusting the oil cylinder and the secondary four-bar linkage, the arm is raised to the required angle for construction; S3: Adjust the extension length of the inner arm through the telescopic cylinder; S4: The angle of the guard plate assembly is adjusted by rotating the oil cylinder to adapt to the front and rear slopes of the tunnel roof. At the same time, the guard plate assembly adapts to the lateral angle of the tunnel roof under the action of the spring assembly.

[0034] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A temporary support device mounted on a roadheader, characterized in that: The invention comprises a cutting part frame (1), a parallelogram turning mechanism arranged in the middle of the cutting part frame (1), a turning oil cylinder (2) driving the parallelogram turning mechanism, a bearing platform (17), a retractable mechanical arm assembly and a guard plate assembly (9), wherein the bearing platform is connected to the cutting part frame through the parallelogram turning mechanism and is driven by the turning oil cylinder to perform horizontal lifting and translation, one end of the mechanical arm assembly is connected to the bearing platform (17) and an angle adjustment mechanism is arranged between the bearing platform and the guard plate assembly is installed at the other end of the mechanical arm assembly and a leveling mechanism is arranged between the bearing platform and the guard plate assembly.

2. The temporary support device mounted on a roadheader according to claim 1, characterized in that: The parallelogram flipping mechanism specifically includes a front rocker (6), a rear rocker (4) and a translation link (11). The middle parts of the front and rear sides of the cutting part frame are respectively connected with a front rocker and a rear rocker, one front and one rear. One end of the front rocker and the rear rocker are connected to the cutting part frame through a fixed hinge pin (5). The cutting part frame serves as the fixed side of the parallelogram flipping mechanism. The other ends of the front rocker and the rear rocker on the same side are connected through a translation link. Both ends of the translation link are connected to the front rocker and the rear rocker through a movable hinge pin (3). A flip cylinder is installed on each of the front and rear sides of the rear end of the cutting part frame. The flip cylinder is movably connected to the cutting part frame and its shaft end is connected to the rear rocker. The bearing platform is horizontally fixed between the translation links on the front and rear sides and performs translation movement along with the translation link.

3. The temporary support device mounted on a roadheader according to claim 1, characterized in that: The angle adjustment mechanism comprises a secondary four-bar linkage and an adjustment oil cylinder (19) arranged on the bearing platform. An adjustment oil cylinder is also arranged on the left and right sides of the mechanical arm assembly. The adjustment oil cylinder is movably installed on the top of the rear end of the bearing platform. The output shaft end of the adjustment oil cylinder is connected to the mechanical arm assembly through the secondary four-bar linkage. The mechanical arm assembly adjusts its angle through the control of the adjustment oil cylinder and in cooperation with the secondary four-bar linkage.

4. The temporary support device mounted on a roadheader according to claim 3, characterized in that: The secondary four-bar linkage is composed of two connecting rods (14) and two rocker arms (12). A connecting rod and a rocker arm are respectively provided on the left and right sides of the robotic arm assembly. One end of the connecting rod is movably connected to the bearing platform. One end of the two rocker arms is movably connected to the two sides of the robotic arm assembly and connected to each other through a connecting piece. The adjusting cylinder is connected to the other end of the connecting rod on the same side and the other end of the rocker arm through a connecting hinge pin (15).

5. The temporary support device mounted on a roadheader according to claim 1, characterized in that: The mechanical arm assembly is composed of an inner arm (10), an outer arm (13) and a telescopic cylinder (16). One end of the outer arm is connected to the bearing platform through a platform connection hinge pin (18). One end of the inner arm extends from the other end of the outer arm into the interior of the outer arm and is connected to the telescopic cylinder arranged in the outer arm. The output shaft end of the telescopic cylinder extends into the inner arm and is fixedly connected to the inner arm. The guard plate assembly is installed on the other end of the inner arm.

6. The temporary support device mounted on a roadheader according to claim 1, characterized in that: The leveling assembly includes a rotating oil cylinder (9-6) for front and rear leveling and a spring assembly for lateral leveling. The guard plate assembly includes a guard plate upper bracket (9-1), a mounting plate (9-5) fixed in the guard plate bracket (9-1), a connecting plate (9-11) and a protective upper crossbeam (9-4). The protective upper crossbeam is connected to one side of the guard plate upper bracket via a telescopic assembly. The rotating oil cylinder is fixed on the mounting plate, and its output shaft is connected to the inner arm via a connecting plate. A spring assembly for lateral adaptive leveling is provided between the connecting plate and the inner arm.

7. The temporary support device mounted on a roadheader according to claim 6, characterized in that: The telescopic assembly comprises a guide frame (9-2) and a telescopic frame (9-3) fixed to the bottom of the front and rear ends of the bracket on the guard plate. The guide frame is provided with a guide groove matching the telescopic frame at one end facing the protective upper crossbeam. The guide groove is rectangular. The cross-section of the telescopic frame is an inverted L-shape. One end of the telescopic frame extends into the guide groove and is connected to the output shaft of the rotary cylinder through a transmission mechanism. The bottom of the upper end of the telescopic frame is provided with a tooth structure (9-10) connected to the transmission mechanism.

8. The temporary support device mounted on a roadheader according to claim 7, characterized in that: The transmission mechanism includes a first transmission gear (9-7), a transition gear (9-8), a second transmission gear, a transmission shaft and a driving gear (9-9). The first transmission gear is installed on the output shaft of the rotating oil cylinder and meshes with a transition gear arranged on the inner wall of a guide frame. A transmission shaft is also horizontally rotatably connected between the two guide frames. The first transmission gear is connected to the second transmission gear sleeved on the transmission shaft through the transition gear. The two ends of the transmission shaft respectively extend into the guide grooves of the two guide frames and are each fixedly connected to a driving gear. The driving gear meshes with the tooth structure on the telescopic frame.

9. The temporary support device mounted on a roadheader according to claim 1, characterized in that: The tilting oil cylinder is connected to the mounting seat movable connecting piece (21) through the oil cylinder mounting seat (20), and the mounting seat movable connecting piece is connected to the side wall of the cutting part frame through the connecting shaft (22). The connecting shaft is provided with a locking gear (23). A connecting seat (24) is also installed on the side wall of the cutting part frame. The connecting seat is provided with a second guide groove matching the locking block (25) on the side facing the locking gear. The locking block is movably connected in the second guide groove and is connected to the switch hydraulic cylinder (26) arranged on the connecting seat. The locking block is provided with an arc groove on the side facing the locking gear. A locking tooth structure matching the locking gear is provided on the inner wall of the arc groove. A conductive sheet is fixed on the side of the locking block away from the locking gear. The conductive sheet is connected to the control circuit and the power supply circuit arranged in the second guide groove through the drive of the switch hydraulic cylinder. The power supply circuit is electrically connected to the control circuit through the conductive sheet. The control circuit is electrically connected to the rotating oil cylinder, the adjusting oil cylinder and the tilting oil cylinder respectively.

10. An operating method of a temporary support device mounted on a roadheader according to any one of claims 1 to 9, characterized in that: The specific steps include: S1: The entire temporary support device in the folded and retracted state is translated and flipped to the front side of the cutting part through the flipping cylinder and the parallelogram linkage mechanism; S2: By adjusting the oil cylinder and the secondary four-bar linkage, the arm is raised to the required angle for construction; S3: Adjust the extension length of the inner arm through the telescopic cylinder; S4: The angle of the guard plate assembly is adjusted by rotating the oil cylinder to adapt to the front and rear slopes of the tunnel roof. At the same time, the guard plate assembly adapts to the lateral angle of the tunnel roof under the action of the spring assembly.

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