Soft rock cutting pick cutting head of open-type cantilever heading machine

Abstract

The utility model relates to the technical field of roadway tunneling equipment, and discloses an open type cantilever tunneling machine soft rock cutting pick cutting head which comprises a cutting head body, cutting pick bodies are evenly arranged outside the cutting head body, and a connecting assembly comprises connecting cylinders evenly and fixedly connected to the outer portion of the cutting head body. One end of the cutting pick body is movably connected to the interior of the connecting cylinder, a cutting pick head of the cutting pick body extends to the exterior of the connecting cylinder, a disc is rotationally connected to the interior of the connecting cylinder through a rotating shaft, a positioning column is fixedly connected to the center of one side of the disc, and a positioning groove is formed in one end of the cutting pick body; fixing holes are circumferentially formed in the outer portion of the cutting pick body at equal intervals, screw holes are formed in the two sides of the connecting cylinder, the same fixing screw rod is arranged in the fixing holes and the screw holes, and the problem that the maintenance cost of the device is increased due to the fact that the cutting pick is frequently replaced is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of roadway driving equipment, in particular to a soft rock pick cutting head of an open-type cantilever roadheader. Background Technique

[0002] A roadheader is a machine used to excavate roadways under a flat ground, mainly composed of a traveling mechanism, a working mechanism, a loading and transporting mechanism and a transfer mechanism. As the traveling mechanism advances forward, the cutting head in the working mechanism will continuously break rocks and transport the broken rocks away. It has the advantages of safety, high efficiency and good roadway formation quality, but it has a high cost, a complex structure and large losses.

[0003] When the existing roadheader is in operation, the picks arranged in a spiral shape on the outside of its cutting head will rotate with the cutting head to excavate the roadway. Since the picks are inclined, the wear rate of the side in contact with the rock during circular motion is much greater than that of the other side. In order not to affect the smooth progress of the excavation operation, the staff needs to regularly replace the picks, which increases the maintenance cost of the device. Therefore, we provide a soft rock pick cutting head of an open-type cantilever roadheader. Content of the Utility Model

[0004] In order to solve the problem that the maintenance cost of the device is increased due to the frequent replacement of picks in the above background technique, the utility model provides a soft rock pick cutting head of an open-type cantilever roadheader.

[0005] The utility model is realized by adopting the following technical solutions: A soft rock pick cutting head of an open-type cantilever roadheader, comprising:

[0006] A cutting head body, on the outside of which pick bodies are evenly arranged;

[0007] A connecting component, the connecting component includes connecting cylinders evenly and fixedly connected to the outside of the cutting head body. One end of the pick body is movably connected to the inside of the connecting cylinder and the pick head of the pick body extends to the outside of the connecting cylinder. A disc is rotatably connected to the inside of the connecting cylinder through a rotating shaft. A positioning column is fixedly connected to the center of one side of the disc. A positioning groove is opened at one end of the pick body. Fixing holes are circumferentially arranged at equal intervals on the outside of the pick body. Screw holes are opened on both sides of the connecting cylinder. The same fixing screw is arranged inside the fixing holes and the screw holes.

[0008] As a further improvement of the above solution, a ball is movably connected to one side of the disc, and an arc-shaped groove adapted to the ball is opened on the inner wall of the connecting cylinder corresponding to the position of the ball.

[0009] As a further improvement of the above solution, the positioning column is designed in a cubic shape and the shape and size of the positioning column are adapted to the shape and size of the positioning groove.

[0010] As a further improvement of the above solution, the diameter of the fixing hole is consistent with the diameter of the fixing screw.

[0011] As a further improvement of the above solution, the included angle between two adjacent groups of the fixing holes is 90 degrees.

[0012] As a further improvement of the above solution, the diameter of the pick body is consistent with the inner cavity diameter of the connecting cylinder.

[0013] As a further improvement of the above solution, the pick bodies are spirally distributed outside the cutting head body.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, by placing the pick body into the connecting cylinder and inserting the positioning post into the positioning groove, and using the threaded connection between the fixing screw and the threaded hole, the fixing screw can penetrate into the fixing hole, thereby realizing the quick installation and fixation of the pick, with strong practicability.

[0016] 2. When one side of the pick body is worn, by rotating the fixing screw to disengage it from the fixing hole, and then rotating the pick body, with the cooperation between the positioning post and the positioning groove, the disc can be driven to rotate, so as to realize the turning of the pick body so that the side with less wear can continue to be used, thereby reducing the replacement frequency of the pick body, saving the maintenance cost of the device. At the same time, with the cooperation between the ball and the arc groove, it can ensure that the pick body rotates precisely by 180 degrees, which can not only completely replace the worn surface, but also facilitate the fixation of the pick body, further improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of the pick body of the present utility model;

[0019] Figure 3 is a front three-dimensional structural schematic diagram of the connecting cylinder of the present utility model;

[0020] Figure 4 is an exploded three-dimensional schematic diagram of the connection structure of the disc and the connecting cylinder of the present utility model.

[0021] MAIN SYMBOL DESCRIPTION:

[0022] 1. Cutting head body; 2. Pick body; 101. Connecting cylinder; 102. Disc; 103. Positioning post; 104. Positioning groove; 105. Fixing hole; 106. Fixing screw; 107. Ball; 108. Arc groove. Detailed implementation mode

[0023] Next, in combination with the accompanying drawings and specific implementation modes, the present utility model will be further described. It should be noted that on the premise of no conflict, the following described embodiments or technical features can be combined arbitrarily to form new embodiments. Embodiment

[0024] Please refer to Figures 1-4 , a soft rock pick cutting head of an open type cantilever roadheader in this embodiment includes:

[0025] Cutting head body 1, on the outside of the cutting head body 1, pick bodies 2 are evenly arranged. The pick bodies 2 are spirally distributed on the outside of the cutting head body 1, which can improve the cutting effect on rocks;

[0026] Connecting component, the connecting component includes connecting cylinders 101 evenly and fixedly connected to the outside of the cutting head body 1. One end of the pick body 2 is movably connected to the inside of the connecting cylinder 101 and the pick head of the pick body 2 extends to the outside of the connecting cylinder 101. Inside the connecting cylinder 101, a disc 102 is rotatably connected through a rotating shaft. One side center of the disc 102 is fixedly connected with a positioning post 103. One end of the pick body 2 is provided with a positioning groove 104. Fixing holes 105 are circumferentially arranged at equal distances on the outside of the pick body 2. Screw holes are arranged on both sides of the connecting cylinder 101. The fixing holes 105 and the screw holes are internally provided with the same fixing screw 106. One side of the disc 102 is movably connected with a ball 107. An arc groove 108 adapted to the ball 107 is arranged on the inner wall of the connecting cylinder 101 corresponding to the position of the ball 107, which can ensure that the pick body 2 rotates precisely by 180 degrees. The positioning post 103 is designed in a cubic shape and the shape and size of the positioning post 103 are adapted to the shape and size of the positioning groove 104. The diameter size of the fixing hole 105 is consistent with the diameter size of the fixing screw 106. The diameter size of the pick body 2 is consistent with the inner cavity diameter size of the connecting cylinder 101.

[0027] In the embodiment of the present application, the implementation principle of a soft rock cutting pick cutting head of an open-type roadheader is as follows: The roadheader drives the cutting head body 1 to rotate and advance, so as to drive the cutting pick body 2 outside it to perform circular motion and advance for roadway excavation. When one side of the cutting pick body 2 is severely worn, by using the thread fit between the fixing screw 106 and the screw hole, the fixing screw 106 is rotated to disengage from the fixing hole 105. Then, the cutting pick body 2 is rotated. By using the cooperation between the positioning post 103 and the positioning groove 104, the disc 102 can be driven to rotate, so that the turning of the cutting pick body 2 can be realized, facilitating the continued use of the side with less wear, thereby reducing the replacement frequency of the cutting pick body 2, saving the maintenance cost of the device. At the same time, through the cooperation between the ball 107 and the arc groove 108, after the cutting pick body 2 rotates 180 degrees, the fixing hole 105 outside it can still be aligned with the screw hole outside the connecting cylinder 101. Then, the fixing screw 106 is rotated again to make it penetrate into the fixing hole 105. When the cutting pick body 2 needs to be replaced, only the old cutting pick body 2 needs to be released and taken out from the connecting cylinder 101. The new cutting pick body 2 is put into the connecting cylinder 101, and after the positioning post 103 is inserted into the positioning groove 104, it can be fixed. Embodiment

[0028] On the basis of Embodiment 1, this embodiment is further improved in that: the included angle between two adjacent groups of fixing holes 105 is 90 degrees, which is convenient for fixing the rotated cutting pick body 2.

[0029] The above implementation manners are only the preferred implementation manners of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the protection scope required by the present invention.

Claims

1. An open cantilever tunnel boring machine soft rock pick cutting head, characterized in that: include: A cutting head body (1), wherein pick bodies (2) are evenly arranged on the outside of the cutting head body (1); A connecting assembly, the connecting assembly comprising a connecting tube (101) uniformly fixedly connected to the outside of a cutting head body (1), one end of the pick body (2) movably connected to the inside of the connecting tube (101) and the pick head of the pick body (2) extending to the outside of the connecting tube (101), the inside of the connecting tube (101) being rotatably connected to a disk (102) via a rotating shaft, a positioning column (103) being fixedly connected to the center of one side of the disk (102), a positioning groove (104) being provided at one end of the pick body (2), fixing holes (105) being equidistantly circumferentially provided on the outside of the pick body (2), screw holes being provided on both sides of the connecting tube (101), and the fixing holes (105) and the inside of the screw holes being provided with the same fixing screw (106).

2. The open cantilever tunnel boring machine soft rock pick cutting head according to claim 1, characterized in that: A ball bearing (107) is movably connected to one side of the disc (102), and an arc-shaped groove (108) matching the ball bearing (107) is provided on the inner wall of the connecting tube (101) at a position corresponding to the ball bearing (107).

3. The open cantilever tunnel boring machine soft rock pick cutting head according to claim 1, characterized in that: The positioning column (103) is designed as a cubic structure, and the shape and size of the positioning column (103) are compatible with the shape and size of the positioning groove (104).

4. The open cantilever tunnel boring machine soft rock pick cutting head according to claim 1, characterized in that: The diameter of the fixing hole (105) is consistent with the diameter of the fixing screw (106).

5. The open cantilever tunnel boring machine soft rock pick cutting head according to claim 1, characterized in that: The included angle between two adjacent groups of fixing holes (105) is 90 degrees.

6. The open cantilever tunnel boring machine soft rock pick cutting head according to claim 1, characterized in that: The diameter of the pick body (2) is consistent with the diameter of the inner cavity of the connecting tube (101).

7. The open cantilever tunnel boring machine soft rock pick cutting head according to claim 1, characterized in that: The pick body (2) is distributed in a spiral shape outside the cutting head body (1).

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