Drill tail of tunneling drill carriage

Abstract

The utility model discloses a driving drill carriage bit shank which comprises a bit shank body and further comprises a water hole, a water opening, an inner supporting pipe, a rotating cylinder and a threaded cylinder. The water hole penetrating through one half of the cross section of a rod body is formed in the rod tail of the bit shank body towards the spline tooth direction of the rod body; a water inlet hole part in the middle of an original bit shank body is changed from an original oval water hole body penetrating through the cross section of the whole bit shank body into an oval water hole penetrating through one half of the cross section of the bit shank body, the stability of the water hole part in the high-speed rotation process of the bit shank body is improved, the shear strength of the water hole part of the bit shank body is improved, and the service life of the bit shank body is prolonged. The weakest part of the whole bit shank body is changed into the trapezoidal thread connection part, and the easily-broken part of the whole bit shank body is the trapezoidal thread part, so that the possibility of breaking at the water hole and damaging the head of the tunneling drill carriage in the original design is greatly reduced, and meanwhile, the maintenance cost of the head of the tunneling drill carriage is reduced; and the service life of the bit shank body in the high-speed operation process is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of drill tails for tunneling drill vehicles, in particular to a drill tail for tunneling drill vehicles. Background Art

[0002] The shank is mainly used in mining operations. It is made of high-quality alloy steel and is carburized as a whole. Special CNC machine tools and processing technology are used to ensure the processing quality of the tail details, internal water holes and side water holes. The shank is uniformly heat treated and scientifically straightened using precision instruments to ensure the straightness and anti-corrosion of the shank.

[0003] The drill tail used in the tunneling drilling rig currently has a trapezoidal thread on one end for installing the tunneling drill bit, and a spline tooth installed on the head of the rock drilling rig on the other end. The water hole is at the end close to the spline tooth, and the water hole is trapezoidal and runs through the entire drill tail. During use, the drill tail rotates at high speed, causing the drill tail installed at the water hole in the head to be easily broken due to excessive force, so that the drill tail breaks in the head, which is inconvenient to replace the drill tail and easily damages the head of the tunneling drilling rig 109, which is not conducive to the maintenance of the equipment and further affects the construction progress of the tunneling project. The drill tail breaks and increases the tunneling cost. For this reason, we propose a drill tail for a tunneling drilling rig. Utility Model Content

[0004] The main purpose of the utility model is to provide a boring machine drill tail, by changing the middle water inlet hole of the original boring machine tail body from the original elliptical water hole body that penetrates the entire boring machine tail body cross section to an elliptical water hole that penetrates to one-half of the boring machine tail body cross section, thereby increasing the stability of the water hole part of the boring machine tail body during high-speed rotation, improving the shear strength of the water hole of the boring machine tail body, making the weakest part of the entire boring machine tail body become the trapezoidal thread connection part, making the easily broken part of the entire boring machine tail body the trapezoidal thread part, greatly reducing the possibility of the original design breaking at the water hole and damaging the boring machine head, while reducing the maintenance cost of the boring machine head, and the inner support tube with an internal column tube inserted in the water hole for support, and the inner support tube is provided with a convex arrangement of oblique ribs to enhance the structural strength of the inner support tube, the improved boring machine tail body has better structural strength, so that the boring machine tail body has a longer service life during high-speed operation, and can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A drill tail for a tunneling drilling vehicle comprises a drill tail body, a water hole, a water outlet, an inner support tube, a rotary cylinder and a threaded cylinder. A water hole penetrating half of the cross section of the rod body is provided at the rod tail of the drill tail body in the direction of its own spline teeth, and a water outlet communicating with the water hole is provided at the rod body of the drill tail body near its own spline teeth. An inner support tube is inserted into the water hole, and a screw-in hole for screwing the threaded cylinder is provided at the tube body of the inner support tube near the water outlet. A rotary cylinder communicating with the threaded cylinder is fixed to the rear barrel mouth of the threaded cylinder, and the rotary cylinder is stuck in the water outlet. An inner ring is protruded inside the barrel mouth of the rotary cylinder, and a notch groove is provided at the ring body of the inner ring. A side opening is provided at the barrel body of the threaded cylinder on the side facing the outer opening of the water hole.

[0007] Furthermore, a column tube is fixed in the tail pipe opening of the inner support tube close to the screw-in hole;

[0008] By adopting the above technical solution, the fixed column tube in the tail pipe opening of the inner support tube close to the screw-in hole can be internally supported and strengthened.

[0009] Furthermore, the inner tube wall of the inner support tube away from the screw-in hole is arranged with oblique ribs;

[0010] By adopting the above technical solution, the protrusions of the oblique ribs in the inner support tube can enhance the structural strength of the inner support tube.

[0011] Furthermore, the diameter of the drum is the same as the diameter of the cavity of the nozzle, and the outer wall of the drum is in close contact with the inner wall of the cavity of the nozzle;

[0012] By adopting the above technical solution, the drum body can be inserted into the water outlet for tight connection.

[0013] Furthermore, the pair of notched grooves are symmetrically provided with two groups of groove bodies of the same size at the inner ring;

[0014] By adopting the above technical solution, a flat-blade screwdriver can be inserted into the notched groove of the inner ring, which makes it convenient to rotate the rotating barrel and the threaded barrel at the inner ring, thereby unscrewing the threaded barrel from the screw-in hole and the water outlet, so that the inner support tube can be removed from the water hole for maintenance.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model changes the water inlet hole in the middle of the original drill bit body from the original elliptical water hole body that penetrates the entire cross section of the drill bit body into an elliptical water hole that penetrates to one-half of the cross section of the drill bit body, thereby increasing the stability of the water hole part of the drill bit body during high-speed rotation, improving the shear strength of the water hole of the drill bit body, making the weakest part of the entire drill bit body become the trapezoidal thread connection part, and making the easily broken part of the entire drill bit body the trapezoidal thread part, greatly reducing the possibility of the original design breaking at the water hole and damaging the head of the excavation drilling vehicle, and at the same time reducing the maintenance cost of the head of the excavation drilling vehicle;

[0017] And an inner support tube with an inner column tube is inserted into the water hole for support, and a convex arrangement of oblique ribs is provided inside the inner support tube to enhance the structural strength of the inner support tube. The improved shank tail body has better structural strength, so that the shank tail body has a longer service life during high-speed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the overall structure of a drill tail of a tunneling drilling vehicle.

[0019] Figure 2 The utility model is an exploded view of a drill tail of a tunneling drilling vehicle.

[0020] Figure 3 The utility model is a schematic diagram of the rotary drum structure of the drill tail of a tunneling drilling vehicle.

[0021] In the figure: 1. drill tail body; 2. water hole; 3. water inlet; 4. inner support tube; 5. column tube; 6. screw-in hole; 7. oblique ribs; 8. rotating cylinder; 9. threaded cylinder; 10. side opening; 11. inner ring; 12. opposite groove. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1-3 As shown, a drill tail for a tunneling drilling vehicle comprises a drill tail body 1, and also comprises a water hole 2, a water outlet 3, an inner support tube 4, a rotary cylinder 8 and a threaded cylinder 9. A water hole 2 penetrating half of the cross section of the rod body is provided at the rod tail of the drill tail body 1 in the direction of its own spline teeth, and a water outlet 3 communicating with the water hole 2 is provided at the rod body of the drill tail body 1 near its own spline teeth. An inner support tube 4 is inserted into the water hole 2, and a screw-in hole 6 for screwing the threaded cylinder 9 is provided at the tube body of the inner support tube 4 near the water outlet 3. A rotary cylinder 8 communicating with the threaded cylinder 9 is fixed at the rear tube mouth of the threaded cylinder 9, and the rotary cylinder 8 is stuck in the water outlet 3. An inner ring 11 is protruded inside the tube mouth of the rotary cylinder 8, and a matching groove 12 is provided at the ring body of the inner ring 11. A side opening 10 is provided at the tube body of the threaded cylinder 9 on the side facing the outer hole of the water hole 2.

[0024] Wherein, a column tube 5 is fixed in the tail pipe opening of the inner support tube 4 close to the screw-in hole 6;

[0025] By adopting the above technical solution, the fixed column tube 5 in the tail pipe opening of the inner support tube 4 close to the screw-in hole 6 can be internally supported and strengthened.

[0026] Wherein, the inner tube wall of the inner support tube 4 away from the screw-in hole 6 is arranged with oblique ribs 7;

[0027] By adopting the above technical solution, the protrusions of the oblique ribs 7 in the inner support tube 4 can enhance the structural strength of the inner support tube 4 .

[0028] The diameter of the drum 8 is the same as the diameter of the cavity of the nozzle 3, and the outer wall of the drum 8 is in close contact with the inner wall of the cavity of the nozzle 3.

[0029] By adopting the above technical solution, the body of the rotating drum 8 can be inserted into the water inlet 3 for tight connection.

[0030] The pair of notched grooves 12 are symmetrically provided with two groups of grooves of the same size at the inner ring 11;

[0031] By adopting the above technical solution, a flat-blade screwdriver can be inserted into the notch 12 of the inner ring 11, which facilitates the rotation of the rotating cylinder 8 and the threaded cylinder 9 at the inner ring 11, thereby unscrewing the threaded cylinder 9 from the screw-in hole 6 and the water outlet 3, so that the inner support tube 4 can be removed from the water hole 2 for maintenance.

[0032] It should be noted that the utility model is a drill tail for a tunnel boring vehicle. The water inlet hole in the middle of the original drill tail body 1 is changed from the original elliptical water hole body that penetrates the entire cross section of the drill tail body 1 to an elliptical water hole 2 that penetrates half of the cross section of the drill tail body 1, thereby increasing the stability of the water hole 2 of the drill tail body 1 during high-speed rotation, improving the shear strength of the water hole 2 of the drill tail body 1, making the weakest part of the entire drill tail body 1 a trapezoidal thread connection, and making the easily broken part of the entire drill tail body 1 a trapezoidal thread, greatly reducing the possibility of the original design breaking at the water hole 2 and damaging the tunnel boring vehicle head, while reducing the maintenance cost of the tunnel boring vehicle head, and the internal mounting is inserted into the water hole 2. The column tube 5 is supported by the inner support tube 4, and the inner support tube 4 is provided with a protrusion of an oblique rib 7 to enhance the structural strength of the inner support tube 4, and the water inlet 3 provided outside the drill tail body 1 can have a threaded tube 9 which is screwed into the screw-in hole 6 of the inner support tube 4, and the rotating cylinder 8 enters the water inlet 3 and is tightly connected, thereby fixing the inner support tube 4, and the tube mouth of the rotating cylinder 8 can be normally connected to the water supply pipe used for the tunneling drilling vehicle by opening a threaded structure, or other joints can be installed to connect to the external water supply pipe. The improved drill tail body 1 has better structural strength, so that the drill tail body 1 has a longer service life during high-speed operation. The above-mentioned tunneling drilling vehicle head is the tunneling drilling vehicle 109 head mentioned in the background technology.

[0033] It should be noted that the utility model is a drill tail for a tunneling drilling vehicle. The components in the utility model are all components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A boring tool tail for a tunnel boring vehicle, comprising a boring tool tail body (1), characterized in that: The invention also comprises a water hole (2), a water inlet (3), an inner support tube (4), a rotating cylinder (8) and a threaded cylinder (9); the rod end of the shank tail body (1) is provided with a water hole (2) penetrating half of the cross section of the rod body in the direction of its own spline teeth, and the rod end of the shank tail body (1) is provided with a water inlet (3) communicating with the water hole (2) near its own spline teeth; the inner support tube (4) is inserted into the water hole (2), and the inner support tube (4) is close to the water inlet (3). ) is provided with a screw-in hole (6) for screwing a threaded barrel (9), a rotating barrel (8) which is in communication with the threaded barrel (9) is fixed to the rear barrel mouth of the threaded barrel (9), and the rotating barrel (8) is inserted into the water outlet (3), an inner ring (11) is protruded inside the barrel mouth of the rotating barrel (8), and a notch groove (12) is provided on the ring body of the inner ring (11), and a side opening (10) is provided on the barrel body of the threaded barrel (9) on the side facing the outer opening of the water hole (2).

2. A boring tool tail according to claim 1, characterized in that: A column tube (5) is fixed in the tail tube opening of the inner support tube (4) close to the screw-in hole (6).

3. The drill tail of a tunneling drilling vehicle according to claim 1, characterized in that: The inner tube wall of the inner support tube (4) away from the screw-in hole (6) is arranged with oblique ribs (7) protruding therefrom.

4. The drill tail of a tunneling drilling vehicle according to claim 1, characterized in that: The body diameter of the rotating drum (8) is the same as the diameter of the cavity opening of the water inlet (3), and the outer wall of the rotating drum (8) is in close contact with the inner wall of the cavity opening of the water inlet (3).

5. The drill tail of a tunneling drilling vehicle according to claim 1, characterized in that: The pair of notched grooves (12) are symmetrically provided with two groups of groove bodies of the same size at the inner ring (11).

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