Supporting device based on roadway roof

Abstract

The invention discloses a supporting device based on a roadway roof, which relates to the technical field of roadway roof supporting and comprises a supporting frame body, a plurality of supporting legs are mounted at the bottom of the supporting frame body, and a protection mechanism is arranged at the bottom of each supporting leg and used for increasing friction force between the supporting legs and a bottom plate when the bottoms of the supporting legs slip. The protection mechanism comprises a plurality of sets of installation box bodies, each set of installation box body is fixedly installed at the bottom of the supporting leg, and the side, away from the supporting leg, of each installation box body is rotationally connected with a protection supporting plate. When the supporting leg slides, the protection supporting plate is triggered in time to turn over and make contact with the roadway bottom plate, meanwhile, under the cooperation of the first protruding head, the sliding resistance of the supporting leg is increased, the problem that the supporting safety of the supporting frame body is affected due to sliding of the supporting leg is solved, the defects in the prior art are overcome, and the using safety of the supporting frame body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of roadway roof support, in particular to a support device based on roadway roof. BACKGROUND

[0002] The roadway roof refers to the top rock layer or soil layer of the tunnel (i.e. "roadway") excavated during coal mining. During the mining process, the roof needs to be supported by a support device to prevent the roadway roof from collapsing during mining and affecting the safety of mining.

[0003] The existing part of the support device, when in use, the support device is divided into a front frame and a rear frame, and the bottom of the front frame and the rear frame is provided with telescopic legs. During use, the temporary support work on the mining route is completed by the alternating extension and retraction of the telescopic legs, the alternating sliding of the front frame and the rear frame.

[0004] Although the above support device can better complete the temporary support work of the roadway roof, in the actual use process, when the device is used for supporting work in soft rock, the rock itself has low strength and is easily softened after encountering water. When the roadway is excavated along an inclined rock layer, the support device is used for supporting work on the softened inclined floor, which is easy to cause the support device to slip, which is not conducive to the support work of the device and reduces the safety of the device during support. SUMMARY

[0005] Therefore, the present application provides a support device based on roadway roof to solve the problems in the prior art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a support device based on roadway roof, comprising a support frame body, a plurality of support legs are installed at the bottom of the support frame body, a protection mechanism is arranged at the bottom of the support leg, which is used to improve the friction between the support leg and the floor when the support leg slips, the protection mechanism comprises a plurality of installation boxes, each installation box is fixedly installed at the bottom of the support leg, a protection plate is rotatably connected to the side of the installation box away from the support leg, a plurality of first protrusions are fixedly connected to the side of the protection plate away from the installation box, which is used to improve the roughness of the side of the protection plate away from the installation box, a driving assembly and a linkage assembly are arranged in the installation box, the driving assembly is in contact with the floor when the support frame body is in use, the driving assembly is triggered when the support leg slips, and the driving assembly is triggered to cooperate with the linkage assembly to drive the protection plate to flip.

[0007] Preferably, the drive assembly includes a contact roller rotatably connected to the mounting box, the shaft end of the contact roller penetrating the mounting box, and a torsion spring sleeved on the outer surface of the shaft end of the contact roller. The two ends of the torsion spring are fixedly connected to the mounting box and the contact roller, respectively. The bottom of the contact roller is lower than the bottom of the mounting box. When the bottom of the support leg abuts against the tunnel floor, the contact roller abuts against the tunnel floor.

[0008] Preferably, the linkage assembly includes an annular groove formed on the contact roller, two first extrusion blocks fixedly connected in the annular groove, a second extrusion block fixedly connected between the two first extrusion blocks, the second extrusion block being thicker than the first extrusion block, a sliding plate slidably connected inside the mounting box, a pressure rod fixedly connected to the bottom of the sliding plate, the pressure rod being located between the two first extrusion blocks, the opposite ends of the two first extrusion blocks being arc-shaped, and the bottom of the pressure rod being arc-shaped. When the contact roller rotates, the sliding plate is driven to slide through the cooperation of the first extrusion blocks and the pressure rod. A rack is fixedly connected to the bottom of the sliding plate, and a gear is fixedly sleeved on the outer surface of the protective support plate's rotating shaft. The gear penetrates the mounting box and meshes with the rack. When the sliding plate slides, the protective support plate is driven to rotate through the cooperation of the rack and the gear.

[0009] Preferably, the outer surface of the contact roller is fixedly connected with a plurality of second protrusions, each of which is tapered.

[0010] Preferably, the first protrusion consists of a cylindrical block and a conical block.

[0011] Preferably, the protective mechanism further includes a reinforcing component, which includes a pressure plate slidably connected to the side of the mounting box away from the support legs. A linkage rod is fixedly connected to the top of the sliding plate. At least two actuating rods are rotatably connected inside the mounting box. A pull rope is fixedly connected to the lower end of each actuating rod. A limit block is slidably connected to the mounting box. The limit block is located at the bottom of the pressure plate and is used to limit the pressure plate. The pull rope passes through the mounting box and is fixedly connected to the limit block. The linkage rod is located at the bottom of the end opposite to the actuating rod. When the sliding plate slides upward a set distance, the linkage rod, the actuating rod, and the pull rope work together to drive the limit block to slide and release the pressure plate from its limit.

[0012] Preferably, the weight of the upper end of the lever is greater than the weight of the lower end, with its pivot point as the center.

[0013] Preferably, at least two first limiting posts are fixedly connected inside the mounting box, each of the first limiting posts being located at the bottom of the upper end of an adjacent toggle lever, for limiting and supporting the top of the toggle lever which has a large weight.

[0014] Preferably, a second limiting post is fixedly connected inside the mounting box, and the second limiting post is used to limit the rotation angle of the toggle lever.

[0015] Preferably, the reinforcing component further includes a limiting strip, which is fixedly connected to the mounting box and contacts the top of the pressure plate to limit the pressure plate.

[0016] Compared with the prior art, the present invention provides a support device for roadway roof, which has the following advantages:

[0017] 1. With the cooperation of the drive component and linkage component in the protective mechanism, when the support leg slips, the present invention promptly triggers the protective support plate to flip and contact the roadway floor. At the same time, with the cooperation of the first protrusion, the resistance when the support leg slips is increased, reducing the problem of the support leg slipping affecting the support safety of the support frame, overcoming the shortcomings of the prior art, and improving the safety of the support frame during use.

[0018] 2. By strengthening the component settings, when the drive component and linkage component are triggered and the protective support plate comes into contact with the roadway ground, if the support leg continues to slide, the triggering of the strengthening component causes the pressure plate to fall to the top of the protective support plate. The pressure generated by the falling plate effectively prevents the first protrusion from detaching from the ground due to sliding, allowing it to re-insert into the ground. Furthermore, the sliding phenomenon of the pressure plate allows workers to observe and stop the tunneling work in time, inspect the support frame, and make timely adjustments to prevent excessive slippage of the support leg, further improving the safety of the support frame during use. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the protective mechanism of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the bottom of the protective mechanism of the present invention;

[0022] Figure 4 This is a cross-sectional view of the protective mechanism of the present invention;

[0023] Figure 5 This is a partial cross-sectional view of the protective mechanism of the present invention;

[0024] Figure 6 This is a partial three-dimensional structural view of the protective mechanism of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the linkage rod and the actuating rod of the present invention.

[0026] In the picture:

[0027] 100. Support frame body; 101. Support legs

[0028] 200. Protective mechanism; 201. Mounting box; 202. Protective support plate; 203. First protrusion; 204. Contact roller; 205. Torsion spring; 206. Annular groove; 207. First extrusion block; 208. Second extrusion block; 209. Sliding plate; 210. Pressure rod; 211. Rack; 212. Gear; 2041. Second protrusion;

[0029] 221. Pressure plate; 222. Linkage rod; 223. Actuating rod; 224. First limit post; 225. Second limit post; 226. Pull rope; 227. Limit block; 2211. Limit strip. Detailed Implementation

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0031] like Figures 1 to 5 As shown, this embodiment provides a support device for roadway roof, including a support frame 100. Several support legs 101 are installed at the bottom of the support frame 100. A protective mechanism 200 is provided at the bottom of each support leg 101 to increase the friction between the support leg 101 and the roadway floor when slippage occurs. The protective mechanism 200 includes multiple sets of mounting boxes 201, each set of mounting boxes 201 being fixedly installed at the bottom of the support leg 101. A protective support plate 202 is rotatably connected to the side of the mounting box 201 away from the support leg 101. The support plate 202 is designed in a convex shape. After the protective support plate 202 is triggered to flip, it ensures that the protective support plate 202 can contact the ground. Multiple first protrusions 203 are fixedly connected to the side of the protective support plate 202 away from the mounting box 201 to improve the roughness of the side of the protective support plate 202 away from the mounting box 201. The mounting box 201 is equipped with a drive component and a linkage component. When the support frame 100 is in use, the drive component contacts the base plate. When the support leg 101 slips, the drive component is triggered. When the drive component is triggered, it cooperates with the linkage component to drive the protective support plate 202 to flip.

[0032] The drive assembly includes a contact roller 204 rotatably connected within the mounting housing 201. The shaft end of the contact roller 204 penetrates the mounting housing 201, and a torsion spring 205 is sleeved on the outer surface of the shaft end of the contact roller 204. Both ends of the torsion spring 205 are fixedly connected to the mounting housing 201 and the contact roller 204, respectively. The bottom of the contact roller 204 is lower than the bottom of the mounting housing 201. When the bottom of the support leg 101 abuts against the tunnel floor, the contact roller 204 abuts against the tunnel floor. The linkage assembly includes an annular groove 206 formed on the contact roller 204. Two first extrusion blocks 207 are fixedly connected within the annular groove 206, and a second extrusion block 208 is fixedly connected between the two first extrusion blocks 207. The thickness of the second extrusion block 208 is greater than that of the first extrusion block 207. A sliding plate 209 is slidably connected inside the box body 201. A pressure rod 210 is fixedly connected to the bottom of the sliding plate 209. The pressure rod 210 is located between two first extrusion blocks 207. The two first extrusion blocks 207 are arc-shaped at opposite ends. The bottom of the pressure rod 210 is arc-shaped. When the contact roller 204 rotates, the sliding plate 209 is driven to slide through the cooperation of the first extrusion blocks 207 and the pressure rod 210. A rack 211 is fixedly connected to the bottom of the sliding plate 209. A gear 212 is fixedly sleeved on the outer surface of the rotating shaft of the protective support plate 202. The gear 212 is installed through the box body 201. The gear 212 meshes with the rack 211. When the sliding plate 209 slides, the protective support plate 202 is driven to rotate through the cooperation of the rack 211 and the gear 212.

[0033] Furthermore, multiple second protrusions 2041 are fixedly connected to the outer surface of the contact roller 204. Each second protrusion 2041 is set to be conical. When the support leg 101 is in normal use, the second protrusions 2041 are inserted into the ground, which will also increase the friction between the support leg 101 and the ground. When the support leg 101 slips, the setting of the second protrusions 2041 can ensure that the friction between the second protrusions 2041 and the ground can drive the contact roller 204 to rotate.

[0034] Furthermore, the first protrusion 203 consists of a cylindrical block and a conical block. The first protrusion 203 can be smoothly inserted into the tunnel floor. At the same time, the cylindrical shape ensures resistance during sliding after insertion.

[0035] Further embodiments, such as Figures 6 to 7As shown, based on the above embodiment, the protective mechanism 200 further includes a reinforcing component, which includes a pressure plate 221. The pressure plate 221 is slidably connected to the side of the mounting box 201 away from the support leg 101. A linkage rod 222 is fixedly connected to the top of the sliding plate 209. At least two actuating rods 223 are rotatably connected inside the mounting box 201. A pull rope 226 is fixedly connected to the lower end of the actuating rod 223. A limit block 227 is slidably connected to the mounting box 201. The limit block 227 is located at the bottom of the pressure plate 221 and is used to limit the pressure plate 221. The pull rope 226 passes through the mounting box 201 and is fixedly connected to the limit block 227. The linkage rod 222 is located at the bottom of the opposite end of the actuating rod 223. When the sliding plate 209 slides upward a set distance, the limit block 227 is driven to slide and release the limit on the pressure plate 221 through the cooperation of the linkage rod 222, the actuating rod 223 and the pull rope 226.

[0036] Furthermore, with its pivot point as the center, the upper end of the lever 223 has a greater weight than the lower end. During reset, after the linkage rod 222 removes its support for the lever 223, the lever 223 automatically rotates due to its weight setting.

[0037] Furthermore, at least two first limiting posts 224 are fixedly connected inside the mounting box 201. Each first limiting post 224 is located at the bottom of the upper end of the adjacent toggle lever 223, which is used to limit and support the top of the toggle lever 223 which has a large weight, and prevent it from rotating a large displacement distance when it is reset.

[0038] Furthermore, a second limiting post 225 is fixedly connected inside the mounting box 201. The second limiting post 225 is used to limit the rotation angle of the toggle lever 223 to prevent the toggle lever 223 from rotating too large an angle and failing to reset.

[0039] Furthermore, the reinforcing component also includes a limiting strip 2211, which is fixedly connected to the mounting box 201. The limiting strip 2211 contacts the top of the pressure plate 221 and is used to limit the pressure plate 221. Under normal conditions, the pressure plate 221 is kept stationary by the limiting strip 2211 and the limiting block 227.

[0040] Furthermore, an inspection plate is provided on the top of the mounting box 201. When the reinforcement component is triggered and the staff arrives to deal with the slippage of the support leg 101, the reinforcement component can be inspected and reset by opening the inspection plate.

[0041] The working principle of all the content in the above embodiments is as follows:

[0042] Before operation, if the support frame 100 needs to be excavated in an inclined and damp roadway, the mounting box 201 can be installed on one or more sides of the bottom support of the support leg 101. The sliding plate 209 is heavier than the mounting box 201. When there is no external interference, under the influence of gravity, the bottom of the pressure rod 210 is in the annular groove 206. Under the pressure of the sliding plate 209, the first protrusion 203 is kept relatively vertical through the meshing of the rack 211 and the gear 212. Under the limitation of the limiting strip 2211 and the limiting block 227, the pressure plate 221 remains in a state where it cannot slide.

[0043] It should be noted that when the support leg 101 is working, it needs to extend and retract, which will generate slight vibration. At this time, affected by the vibration, the sliding plate 209 will slide up and down slightly, but it will not cause the protective support plate 202 to flip and contact the roadway floor, so that the protective mechanism 200 is in an untriggered state, saving space at the bottom of the support frame 100 during mining and ensuring the passage of the tunneling equipment.

[0044] The following describes the working principle and beneficial effects of the protective mechanism 200:

[0045] When the support frame 100 and the support legs 101 are in normal use, the support legs 101 perform continuous support work by telescoping and sliding the support frame 100. During the support process, the contact rollers 204 and the second protrusions 2041 increase the friction with the roadway floor, thereby improving the stability of the bottom of the support legs 101 against the roadway floor.

[0046] When the support leg 101 slips, the slippage causes the mounting box 201 to move accordingly. As the mounting box 201 moves, the contact roller 204 abuts against the base plate, and friction causes the contact roller 204 to rotate. When the contact roller 204 rotates, it causes the two first pressing blocks 207 to rotate simultaneously. This causes one of the first pressing blocks 207 to approach the pressure rod 210, pressing the arc-shaped surface of the pressure rod 210 against its arc-shaped surface, pushing the pressure rod 210 and the sliding plate 209 upwards. As the sliding plate 209 slides upwards, it causes the rack 211 to slide upwards, which in turn causes the rack 211 to drive the gear 212 to rotate counterclockwise. Figure 5As shown, the rotation of gear 212 drives the rotation of protective support plate 202, which in turn causes the protective support plate 202 to rotate towards the bottom plate. When the first pressing block 207 presses the pressure rod 210 until the pressure rod 210 is in complete contact with the outer side of the first pressing block 207, the rack 211 has already driven the gear 212 to rotate 90 degrees and just disengaged from the gear 212. The shaft of the protective support plate 202 rotates with the gear 212, causing the protective support plate 202 to contact the roadway ground. The first protrusion 203 is inserted into the ground, thereby increasing the friction with the ground. If the support leg 101 continues to slide at this time, the sliding resistance will increase, improving the fixing effect of the support leg 101 during support.

[0047] With the cooperation of the drive component and linkage component in the protective mechanism 200, when the support leg 101 slips, the present invention promptly triggers the protective support plate 202 to flip and contact the roadway floor. At the same time, with the cooperation of the first protrusion 203, the resistance when the support leg 101 slips is increased, reducing the problem that the support leg 101 slips and affects the support safety of the support frame 100. This overcomes the shortcomings of the prior art and improves the safety of the support frame 100 during use.

[0048] Furthermore, the first protrusion 203 is composed of a cylindrical block and a conical block. The conical shape allows the first protrusion 203 to be smoothly inserted into the tunnel floor, while the cylindrical shape ensures resistance during sliding after insertion.

[0049] Furthermore, with the second protrusion 2041 in place, when the support leg 101 is in normal use, the second protrusion 2041 is inserted into the ground, which will increase the friction between the support leg 101 and the ground. And when the support leg 101 slips, the second protrusion 2041 can ensure that the friction between the second protrusion 2041 and the ground can drive the contact roller 204 to rotate, thereby ensuring the subsequent flipping operation of the protective support plate 202.

[0050] It should be noted that when the lifting pressure rod 210 of the first extrusion block 207 rises, the distance that the pressure rod 210 rises is the thickness of the first extrusion block 207. Its rising distance, with the cooperation of the rack 211 and the gear 212, just drives the gear 212 to rotate ninety degrees and at the same time disengages from the gear 212.

[0051] Furthermore, when the support frame 100 needs to be moved after the support area is completed, the contact roller 204 rotates and drives the torsion spring 205 to twist as it slides. Therefore, when the support leg 101 is lifted, the friction between the contact roller 204 and the ground is canceled, and the torsion spring 205 rotates back to its original position, simultaneously driving the first pressing block 207 to reset. At this time, the pressure rod 210 returns to the position between the two first pressing blocks 207.Figure 4 As shown, under the action of gravity, the sliding plate 209 slides downward, the gear 212 and the rack 211 return to the meshing state, and with the cooperation of the rack 211 and the gear 212, the protective support plate 202 rotates ninety degrees and resets.

[0052] Furthermore, by strengthening the component settings, when the drive component and linkage component are triggered, and the protective support plate 202 comes into contact with the roadway ground, if the support leg 101 continues to slide, it will drive the contact roller 204 to rotate, causing the second pressing block 208 to begin contacting the pressure rod 210. The second pressing block 208 continues to press the pressure rod 210 upwards, and the sliding plate 209 continues to rise, driving the linkage rod 222 to rise. This causes the linkage rod 222 to push the actuating rod 223 so that the closer end rotates upwards and the farther end rotates downwards and moves closer to each other. This causes the lower end of the actuating rod 223 to pull the pull rope 226, causing the limiting block 227 to slide into the mounting box 201, thereby releasing the pressure plate 22. The bottom limit plate 221, under the influence of gravity, falls rapidly downwards and lands on top of the protective support plate 202. The pressure of the fall increases the pressure between the protective support plate 202 and the first protrusion 203 and the ground, further increasing the friction during sliding. At the same time, the pressure generated by the fall also prevents the first protrusion 203 from slipping off the ground during sliding. By pressing down, it is reinserted into the ground. Furthermore, the slippage of the pressure plate 221 allows workers to observe and stop the tunneling work in time, inspect the support frame 100, and make timely adjustments to prevent excessive slippage of the support legs 101, thus improving the safety of the support frame 100 during use.

[0053] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A supporting device based on roadway roof, comprising a supporting frame body (100), the bottom of the supporting frame body (100) is provided with a plurality of supporting legs (101), characterized in that, The supporting leg (101) is provided with a protection mechanism (200) at the bottom, which is used to improve the friction between the supporting leg (101) and the bottom plate when the supporting leg (101) slips at the bottom; The protection mechanism (200) comprises a plurality of groups of mounting box bodies (201), each group of the mounting box bodies (201) is fixedly installed at the bottom of the supporting leg (101), the mounting box body (201) is rotatably connected with a protection support plate (202) on the side away from the supporting leg (101), and the protection support plate (202) is fixedly connected with a plurality of first convex heads (203) on the side away from the mounting box body (201), so as to improve the roughness of the side of the protection support plate (202) away from the mounting box body (201); The mounting box body (201) is provided with a driving assembly and a linkage assembly, the driving assembly is in contact with the bottom plate when the support frame body (100) is used, the driving assembly is triggered when the supporting leg (101) slips, and the driving assembly is triggered to cooperate with the linkage assembly to drive the protection support plate (202) to overturn.

2. The support device for the roadway roof according to claim 1, characterized in that: The driving assembly comprises a contact roller (204) rotatably connected in the mounting box body (201), the shaft end of the contact roller (204) penetrates the mounting box body (201), and the outer surface of the shaft end of the contact roller (204) is sleeved with a torsional spring (205), the two ends of the torsional spring (205) are fixedly connected with the mounting box body (201) and the contact roller (204), respectively, the bottom of the contact roller (204) is lower than the bottom of the mounting box body (201), and the contact roller (204) is in abutment with the roadway floor when the bottom of the supporting leg (101) abuts against the roadway floor.

3. The support device for a roadway roof according to claim 2, characterized in that: The linkage assembly comprises an annular groove (206) formed in the contact roller (204), two first extrusion blocks (207) are fixedly connected in the annular groove (206), a second extrusion block (208) is fixedly connected between the two first extrusion blocks (207), the thickness of the second extrusion block (208) is greater than that of the first extrusion block (207), a sliding plate (209) is slidably connected in the mounting box body (201), a pressure receiving rod (210) is fixedly connected to the bottom of the sliding plate (209), the pressure receiving rod (210) is located between the two first extrusion blocks (207), the opposite ends of the two first extrusion blocks (207) are arranged in an arc shape, the bottom of the pressure receiving rod (210) is arranged in an arc shape, when the contact roller (204) rotates, the first extrusion blocks (207) and the pressure receiving rod (210) cooperate to drive the sliding plate (209) to slide, the bottom of the sliding plate (209) is fixedly connected with a rack (211), a gear (212) is fixedly sleeved on the outer surface of the rotating shaft of the protection support plate (202), the gear (212) penetrates the mounting box body (201), the gear (212) is in meshing connection with the rack (211), and when the sliding plate (209) slides, the rack (211) and the gear (212) cooperate to drive the protection support plate (202) to rotate.

4. The support device for the roadway roof according to claim 2, characterized in that: The outer surface of the contact roller (204) is fixedly connected with a plurality of second protrusions (2041), each of which is in a conical shape.

5. The support device for a roadway roof according to claim 1, characterized in that: The first protrusion (203) is composed of a cylindrical block and a conical block.

6. The support device for a roadway roof according to claim 3, characterized in that: The protection mechanism (200) further comprises a reinforcing assembly, the reinforcing assembly comprises a pressing plate (221) which is slidingly connected to the installation box body (201) away from the support leg (101), the top of the sliding plate (209) is fixedly connected with a linkage rod (222), the installation box body (201) is rotatably connected with at least two toggle levers (223), the lower end of the toggle lever (223) is fixedly connected with a pull rope (226), the installation box body (201) is slidingly connected with a limiting block (227), the limiting block (227) is located at the bottom of the pressing plate (221) and is used for limiting the pressing plate (221), the pull rope (226) penetrates through the installation box body (201) and is fixedly connected with the limiting block (227), the linkage rod (222) is located at the bottom of the opposite end of the toggle lever (223), when the sliding plate (209) slides upward by a set distance, the limiting block (227) is driven to slide and the limiting of the pressing plate (221) is released through the cooperation of the linkage rod (222), the toggle lever (223) and the pull rope (226).

7. A support device for use in a roadway roof as claimed in claim 6, characterised in that: The toggle lever (223) is centered on its rotating shaft, and the weight of the upper end is greater than that of the lower end.

8. The support device for a roadway roof according to claim 6, characterized in that: The installation box body (201) is fixedly connected with at least two first limiting columns (224), each of which is located at the bottom of one end of the adjacent toggle lever (223) and is used for limiting and supporting the top of the toggle lever (223) with greater weight.

9. The support device for a roadway roof according to claim 6, characterized in that: The installation box body (201) is fixedly connected with a second limiting column (225), which is used for limiting the rotation angle of the toggle lever (223).

10. The support device for a roadway roof according to claim 6, characterized in that: The reinforcing assembly further comprises a limiting strip (2211) which is fixedly connected to the installation box body (201) and is in contact with the top of the pressing plate (221) for limiting the pressing plate (221).

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