A device for tunnel drilling

Abstract

A tunnel drilling device includes a tool holder assembly and a support assembly. The tool holder assembly includes a connecting rod and folding blades. The support assembly includes a support housing and front and rear linear bearings within it. The connecting rod includes a shaft and a mounting bracket connected in a tray-like manner. The mounting bracket has four pairs of double connecting lugs on its side, which are respectively hinged to the folding blades. The folding blades are also hinged to the support housing. The blades have cutting guide holes, and the housing has mud and sand guide holes and a central through hole. The tail end of the shaft is inserted into the slots of the front and rear linear bearings in the support housing and extends outward, driven by a telescopic motor to fold and unfold the blades. The mounting bracket is located in the outwardly expanded hole at the front end of the support housing, and the four sets of folding blades are located outside the support housing. The housing is driven by a motor to rotate the blades for cutting. This invention allows for overall rotation and tunneling from a folded state, drilling holes in the wall. After the folding blades are parallel to the front, they are fixed to the wall, serving as support points for other equipment. The structure is stable and simple.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, specifically to a drilling device for tunnels, particularly suitable for drilling devices in subway tunnels. Background Technology

[0002] With the widespread use of subways, underground tunnel excavation has become a demanding task. The vast majority of construction companies in China still rely on manual excavation. Developing portable tunneling machinery is urgently needed. However, securing some of this machinery has become a challenge; without a stable anchor point, the machinery cannot excavate effectively. Therefore, designing a mechanical structure that can drill holes and form a secure anchor point on the tunnel face is a top priority. Summary of the Invention

[0003] This invention provides a tunnel drilling device, which aims to solve the technical problems of the mechanical structure of tunneling and drilling and the formation of a solid support point on the tunnel wall.

[0004] This invention is achieved through the following technical solution:

[0005] A tunnel drilling device, characterized in that it includes a tool holder assembly 1 and a support assembly 2; the tool holder assembly 1 includes a connecting rod 11 and a folding blade 12; the support assembly 2 includes a support housing 21 and a front linear bearing 23 and a rear linear bearing 22 disposed inside the housing.

[0006] The connecting rod 11 includes an optical axis 111 and a mounting bracket 112 connected to the optical axis in a tray-like manner. The mounting bracket has at least four pairs of double connecting ears 1121 symmetrical to the optical axis centerline on the side of the bracket, and the connecting ear panels are arranged longitudinally along the optical axis. A folding blade 12 is provided for each pair of connecting ears.

[0007] The folding blade 12 includes a blade head 1201, a handle 1202, and a handle connecting end 1203 integrally connected in sequence. The blade head is a symmetrically arranged fan-shaped blade. The blade head and handle are provided with cutting guide holes 121. The folding blade 12 has a central cavity 1210 that penetrates both sides of the blade body in the thickness direction. The fan-shaped blade head 1201 has a vertically and vertically perforated hole 1211. The perforated hole communicates with the central cavity and together constitutes the cutting guide hole 121 of the folding blade 12. The handle connecting end has two forked ends at the end of the handle, which are forked along a vertical direction perpendicular to the fan-shaped blade head. One forked end is at the end of the handle and the other is at the outer end of the handle. Each forked end is provided with a double connecting lug. The double connecting lug at the outer end of the handle is provided with a fixing pin mounting hole 122, and the double connecting lug at the end of the handle is provided with a connecting rod pin mounting hole 123.

[0008] The connecting rod pin mounting hole 123 of the double connecting lug at the end of the handle is hinged to one end of the connecting rod 13 via the outer pin 14, and the other end of the connecting rod 13 is hinged to the double connecting lug 1121 via the connecting rod pin 15; the fixing pin mounting hole 122 of the double connecting lug at the outer end of the handle is hinged to the supporting shell 21 via the blade fixing pin 16.

[0009] The supporting shell 21 is provided with a mud and sand guide hole 211 and a middle through hole 212. The front and rear ends of the supporting shell 21 are provided with a front axle head and a rear axle head that are thicker than the middle section. Multiple axial mud and sand guide grooves 210 are provided on the outer wall of the shell between the front axle head and the rear axle head. The tail end of the optical shaft 111 is inserted into the front linear bearing 23 fixed in the middle through hole 212 of the supporting shell 21 and passes through the hole groove of the rear linear bearing 22 to exit the rear end of the supporting shell 21. The optical shaft 111 slides in fit with the hole groove of the front linear bearing 23 and the rear linear bearing 22. The mounting bracket is located in the outer expansion hole 2121 of the middle through hole at the front end of the supporting shell 21. The four sets of folding blades 12 are located outside the supporting shell 21.

[0010] The tunnel drilling device includes a central through-hole 212 at the center of the supporting housing 21, which extends through both ends. The central through-hole in the front axle head is a stepped outward-expanding hole 2121. Multiple axial mud and sand guide holes 211 are provided on the end face of the front axle head, which are connected to the mud and sand guide groove outside the supporting housing 21. A partition wall 24 is symmetrically arranged on the circumference of the front axle head corresponding to the double connecting lugs 1121. The partition wall 24 between the mud and sand guide holes is hinged to the fixing pin mounting hole 122 of the double connecting lug at the outer end of the tool holder by the blade fixing pin 16. The front linear bearing 23 and the rear linear bearing 22 are respectively installed in the central through-holes 212 of the front axle head and the rear axle head.

[0011] The tunnel drilling device includes a central cavity with a support pad 124 integrally connected to the handle; the handle is slatted; and the two forked ends are located on the extension line of the handle and on the underside of the outer side of the handle.

[0012] In the aforementioned tunnel drilling device, when each of the folding blades 12 is unfolded, the blade heads are in the same circumferential plane perpendicular to the optical axis, and the blade heads are at the same central angle to each other; when the four sets of folding blades 12 are closed, the blade heads are on the tangent surface of a conical surface coaxial with the optical axis.

[0013] In the aforementioned tunnel drilling device, the connecting rod 11 extends and retracts along the axial direction, causing the folding blade 12 to simultaneously unfold or fold and close; the supporting shell 21 rotates, causing the folding blade 12 to rotate and cut synchronously.

[0014] The aforementioned tunnel drilling device includes a chamfered head in the thickness direction and a circular arc surface in the width direction of the head.

[0015] The beneficial effects of this invention are:

[0016] In use, the device rotates from a folded state to create a suitable hole in the wall. As the hole is drilled deeper, the folding blade deforms under the action of the connecting rod, drilling while deforming. Once the folding blade is parallel to the front, the entire device stops rotating and is fixed to the wall. The portion of the wall not drilled into the wall can serve as a support point for other equipment. Furthermore, the device has a simple structure and good stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the unfolded state of the folding blade of the present invention.

[0019] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0020] Figure 4 This is a schematic diagram of the connecting rod structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the supporting shell of the present invention.

[0022] Figure 6 This is a schematic diagram showing the distribution of mud and sand guide holes on the supporting shell of the present invention.

[0023] Figure 7 This is a schematic diagram of the folding blade structure of the present invention.

[0024] Figure 8 , 9 10 is a schematic diagram of the drilling process of the present invention.

[0025] Figure 11 This is a schematic diagram of the tool holder assembly of the present invention.

[0026] Explanation of the attached drawing numbers:

[0027] Tool holder assembly 1, connecting rod 11, optical axis 111, mounting bracket 112, connecting ear 1121, folding blade 12, cutting guide hole 121, intermediate cavity 1210, hollow hole 1211, fixing pin mounting hole 122, connecting rod pin mounting hole 123, support pad 124, tool head 1201, tool holder 1202, tool holder connecting end 1203, connecting rod 13, outer pin 14, connecting rod pin 15, blade fixing pin 16. Support assembly 2, support shell 21, mud and sand guide channel 210, mud and sand guide hole 211, intermediate through hole 212, outer expansion hole 2121, rear linear bearing 22, front linear bearing 23, partition wall 24. Detailed Implementation

[0028] To more clearly illustrate the present invention, the following description, in conjunction with specific embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0029] See Figure 1-11 As shown, a tunnel drilling device of the present invention includes a tool holder assembly 1 and a support assembly 2; the tool holder assembly 1 includes a connecting rod 11 and a folding blade 12; the support assembly 2 includes a support housing 21 and a front linear bearing 23 and a rear linear bearing 22 disposed inside the housing.

[0030] See Figure 4 As shown, the connecting rod 11 includes an optical axis 111 and a mounting bracket 112 connected to the optical axis in a tray-like manner. The mounting bracket is located at the front end of the optical axis. The mounting bracket has at least four pairs of double connecting ears 1121 symmetrical to the optical axis centerline on the side of the bracket, and the connecting ear panels are arranged longitudinally along the optical axis. A folding blade 12 is provided for each pair of connecting ears.

[0031] See Figure 7As shown, the folding blade 12 includes a blade head 1201, a handle 1202, and a handle connecting end 1203 integrally connected in sequence. The blade head is a symmetrically arranged fan-shaped blade. The blade head and handle are provided with cutting guide holes 121. The folding blade 12 has a central cavity 1210 that penetrates both sides of the blade body in the thickness direction. The fan-shaped blade head 1201 has a hollow hole 1211 that is open at both the top and bottom. The hollow hole communicates with the central cavity and together constitutes the cutting guide hole 121 of the folding blade 12. The handle connecting end has two forked ends at the end of the handle and forks along the vertical direction perpendicular to the fan-shaped blade head. One forked end is at the end of the handle and the other is at the outer end of the handle. Each forked end is provided with a double connecting lug. The double connecting lug at the outer end of the handle is provided with a fixing pin mounting hole 122, and the double connecting lug at the end of the handle is provided with a connecting rod pin mounting hole 123.

[0032] See Figure 3 , 11 As shown, the connecting rod pin mounting hole 123 of the double connecting lug at the end of the handle is hinged to one end of the connecting rod 13 via the outer pin 14. The other end of the connecting rod 13 is hinged to the double connecting lug 1121 via the connecting rod pin 15. The two ends of the connecting rod 13 are respectively inserted into the double connecting lug at the end of the handle or the middle of the double connecting lug. The fixing pin mounting hole 122 of the double connecting lug at the outer end of the handle is hinged to the supporting shell 21 via the blade fixing pin 16.

[0033] See Figure 3 , 5 As shown in Figure 6, the supporting shell 21 is provided with a mud and sand guide hole 211 and a middle through hole 212. The front and rear ends of the supporting shell 21 are provided with a front axle head and a rear axle head that are thicker than the middle section. Multiple axial mud and sand guide grooves 210 are provided on the outer wall of the shell between the front axle head and the rear axle head. The tail end of the optical shaft 111 is inserted into the front linear bearing 23 fixed in the middle through hole 212 of the supporting shell 21 and passes through the hole groove of the rear linear bearing 22 to exit the rear end of the supporting shell 21. The optical shaft 111 slides in fit with the hole groove of the front linear bearing 23 and the rear linear bearing 22. The mounting bracket is located in the outer expansion hole 2121 of the middle through hole at the front end of the supporting shell 21. The four sets of folding blades 12 are located outside the front end of the supporting shell 21.

[0034] See Figure 1 , 3As shown in Figures 5 and 6, in a tunnel drilling device, the supporting housing 21 has a central through hole 212 extending through both ends, and the central through hole in the front axle head is a stepped outwardly enlarging hole 2121; multiple axially penetrating mud and sand guide holes 211 are arranged along the circumference of the front axle head end face, connecting to the mud and sand guide groove outside the supporting housing 21; partition walls 24 are symmetrically arranged on the circumference of the front axle head between the mud and sand guide holes, and the partition walls 24 are arranged corresponding to the double connecting ears 1121 of the mounting bracket 112. Figure 3 The partition wall 24 is hinged to the fixing pin mounting hole 122 of the outer end double connecting ear of the blade holder through the blade fixing pin 16. The middle of the outer end double connecting ear of the blade holder is inserted into the partition wall for hinged connection. The front linear bearing 23 and the rear linear bearing 22 are respectively installed in the middle through hole 212 of the front axle head and the rear axle head.

[0035] See Figure 7 As shown, in a tunnel drilling device, the intermediate cavity has a support pad 124 integrally connected to the handle to improve the blade strength; the handle is slatted; one of the two forked ends is on the extension line of the handle, and the other is on the lower outer side of the handle.

[0036] See Figure 2 , 8 As shown in Figures 9 and 10, in the tunnel drilling device, when each of the folding blades 12 is unfolded, each blade head fan face is in the same circumferential plane perpendicular to the optical axis, and they form the same central angle with each other; when each of the folding blades 12 is closed, each blade head fan face is on the tangent surface of a conical surface coaxial with the optical axis.

[0037] In the aforementioned tunnel drilling device, the connecting rod 11 extends and retracts along the axial direction, causing the folding blade 12 to simultaneously unfold or fold and close; the supporting shell 21 rotates, causing the folding blade 12 to rotate and cut synchronously.

[0038] See Figure 7 As shown, in a tunnel drilling device, the head of the cutting head has a chamfer in the thickness direction and a circular arc surface in the width direction.

[0039] The connecting rod 11 passes through the slots of the rear linear bearing 22 and the front linear bearing 23, and can slide back and forth within these slots; the cutting guide hole 121 allows the cut waste to be guided downwards through the cutting guide hole 121 when the folding blade 12 rotates around the center line of the optical axis 111; the mud and sand guide hole 211 allows the waste cut by the folding blade 12 to flow outwards, preventing blockage during the cutting process; when the connecting rod 11 slides within the rear linear bearing 22 and the front linear bearing 23, it drives the folding blade 12 and the connecting rod 13 to move, thereby achieving the deformation of the folding blade 12.

[0040] The working process of this invention:

[0041] See Figure 8-10 As shown, when excavation is required on the tunnel cross-section, there is no structure on the tunnel cross-section in the excavation direction that can serve as an installation support point. Figure 8 As shown, before drilling, the folding blade 12 is folded up so that the diameter of the hole drilled by the rotating structure matches the diameter of the hole in the supporting shell 21. The entire structure drills a hole into the wall. When a certain depth is reached, the supporting shell 21 can be supported on the wall. The folding blade 12 opens when the entire structure rotates, forming a cavity at the rear. The mud and sand drilled through the mud and sand guide hole 211 can flow out. Figure 9 As shown; when the folding blade 12 is opened to be perpendicular to the axis of the support housing 21, it stops moving, so that the structure cannot be removed from the drilled hole, as shown. Figure 10 As shown, this structure can serve as a support point for other equipment.

[0042] In this invention, during drilling, a telescopic motor drives the optical shaft 111 to push and pull, thereby manipulating the folding blade 12 to open or fold; simultaneously, the motor and transmission system drive the supporting shell 21 to rotate and cut. The telescopic motor, motor, and transmission system are conventional technologies and will not be described in detail.

[0043] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the appended claims.

Claims

1. A tunnel drilling apparatus, comprising: Including knife rest assembly (1), support assembly (2);The knife rest assembly (1) includes connecting rod (11), folding blade (12);The support assembly (2) includes support shell (21) and the front end linear bearing (23) and rear end linear bearing (22) arranged in shell; The connecting rod (11) includes optical axis (111), and the mounting bracket (112) connected with the optical axis in tray type, the mounting bracket is located at the front end of the optical axis, the mounting bracket is provided with at least four pairs of double connecting ears (1121) symmetrical to the optical axis axis line on the side surface of the bracket, and the connecting ear faceplate is longitudinally arranged along the optical axis;Corresponding to each pair of connecting ears, one piece of the folding blade (12) is provided; The folding blade (12) includes integrally connected sequentially arranged tool bit (1201), shank (1202) and shank connecting end (1203), the tool bit is symmetrically arranged fan face, the tool bit, shank are provided with cutting flow guide hole (121), the folding blade (12) is provided with through middle cavity (1210) in the thickness direction between the two side surfaces of the tool body, and the upper and lower through hollow hole (1211) is arranged in the fan of the tool bit (1201), the hollow hole is communicated with the middle cavity and jointly constitutes the cutting flow guide hole (121) of the folding blade (12), the shank connecting end is provided with two bifurcated ends at the end of the shank and is bifurcated along the vertical direction of the fan face of the tool bit, and one of the bifurcated ends is at the end of the shank and the other is at the outer end of the shank, each bifurcated end is provided with double connecting ears one, the double connecting ears one at the outer end of the shank is provided with fixed pin shaft mounting hole (122), and the double connecting ears one at the end of the shank is provided with connecting rod pin shaft mounting hole (123); The connecting rod pin shaft mounting hole (123) of the double connecting ears one at the end of the shank is connected with one end of the connecting rod (13) through the outer side pin shaft (14), the other end of the connecting rod (13) is connected with the double connecting ears (1121) through the connecting rod pin shaft (15);The fixed pin shaft mounting hole (122) of the double connecting ears one at the outer end of the shank is connected with the support shell (21) through the blade fixed pin shaft (16); The support shell (21) is provided with silt flow guide hole (211) and middle through hole (212), the support shell (21) is provided with a front shaft head and a rear shaft head thicker than the middle section at the front end and the rear end, a plurality of axial silt flow grooves (210) are arranged on the outer wall of the shell body between the front shaft head and the rear shaft head, the tail end of the optical axis (111) is inserted into the front end linear bearing (23) fixed in the middle through hole (212) of the support shell (21) and passes out from the hole groove of the rear end linear bearing (22) at the rear end of the support shell (21), the optical axis (111) is slidably fitted with the hole groove of the front end linear bearing (23) and the rear end linear bearing (22), the mounting bracket is located in the outer expansion hole (2121) of the middle through hole at the front end of the support shell (21), and four groups of the folding blade (12) are located outside the support shell (21).

2. A tunnel boring apparatus as claimed in claim 1, wherein, The support shell (21) is provided with a through-hole (212) in the middle, the through-hole in the front shaft head is a stepped outwardly expanding hole (2121); the front shaft head is provided with a plurality of sand flow guide holes (211) along the circumference of the end face, which are connected with the sand flow guide groove outside the support shell (21); the corresponding symmetrical sand flow guide holes are provided with a partition wall (24) between the double connecting ears (1121) on the circumference of the front shaft head; the outer end double connecting ear one of the blade handle is connected with the fixed pin shaft mounting hole (122) of the blade fixed pin shaft (16) through the hinged connection; the front linear bearing (23) and the rear linear bearing (22) are respectively installed in the middle through-hole (212) of the front shaft head and the rear shaft head.

3. A tunnel boring apparatus as claimed in claim 1, wherein, The support pad (124) is provided in the middle cavity of the blade handle, and the blade handle is integrally connected with the blade handle; the blade handle is in the form of a strip; one of the two forked ends is on the extension line of the blade handle, and the other is below the outer side of the blade handle.

4. A tunnel boring apparatus as claimed in claim 1, wherein, Each of the folding blades (12) is unfolded, and each blade head sector is at the same circumferential surface perpendicular to the optical axis, and has the same central angle included angle; four sets of the folding blades (12) are folded, and each blade head sector is on the tangent plane of the conical surface coaxial with the optical axis.

5. A tunnel boring apparatus as claimed in claim 4, wherein, The connecting rod (11) is axially telescopic to drive the folding blades (12) to be unfolded or folded synchronously; the support shell (21) is rotated to drive the folding blades (12) to be rotated and cut synchronously.

6. A tunnel boring apparatus as claimed in claim 1, wherein, The head part of the blade head is provided with a chamfer in the thickness direction, and the head part of the blade head is provided with a circular arc surface in the width direction.

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