Anchoring and positioning structure for traveling part and body of heading machine

Abstract

The utility model discloses an anchoring and positioning structure for a traveling part and a body of a heading machine, a lower connecting plate I is provided with a horizontal key groove, a horizontal connecting key is fixed in the horizontal key groove through a screw, and an upper connecting plate I is provided with an upper horizontal connecting groove corresponding to the horizontal key; the lower connecting plate II and the upper connecting plate II are provided with corresponding pin holes, and the positioning pins are inserted into the pin holes; the second lower connecting plate is provided with a locking disc which is a disc and is fixed to the second lower connecting plate. The second upper connecting plate is provided with a through hole corresponding to the stop disc. And the stop disc is embedded into the through hole. According to the utility model, the horizontal key and the positioning pin are added, so that the defect that the structure in the prior art is not provided with a limiting structure in the vertical direction is overcome, and the accuracy and firmness of connection are ensured; due to the arrangement of the stop disc, the stability of structural connection is enhanced, and the stable connection between the heading machine main body part and the walking mechanism can still be ensured even under the condition that the bolt deforms.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a tunneling machine. Background Art

[0002] As the main equipment for developing tunnels underground, the weight of the tunnel boring machine is relatively large, and the driving force required during the movement is correspondingly large. The walking mechanism, as the main supporting component, is close to the ground and is responsible for the forward, backward, turning and cutting and feeding movements of the tunnel boring machine. The connection method between the existing tunnel boring machine main body 2 and the walking mechanism 3 is shown in the figure. The tunnel boring machine main body includes an upper connecting plate 1 21 close to the shovel end and an upper connecting plate 2 22 away from the shovel end, and the walking mechanism includes a lower connecting plate 1 31 corresponding to the upper connecting plate 1 21 and a lower connecting plate 2 32 corresponding to the upper connecting plate 22; the lower connecting plate 1 31 is provided with a through hole, and the bolt 4 passes through the through hole and is tightened in the screw hole of the upper connecting plate 1 21; for accurate positioning, the lower connecting plate 1 31 is also provided with a keyway in a vertical direction, and the positioning key 33 is fixed in the keyway by a keyway screw 331, and the upper connecting plate 1 21 is provided with an upper keyway 23 corresponding to the position of the positioning key; while the upper connecting plate 2 and the lower connecting plate 2 are only connected by bolts.

[0003] Due to the extremely harsh working conditions in coal mines, the tunnel boring machine encountered a fault in which the bolts connecting the walking mechanism and the main body of the tunnel boring machine broke during operation. The fault phenomenon was manifested as the bolts breaking flush with the main body plane, and the bolt threads remaining in the main body had a polarization phenomenon of loose or tight. The bolt preload was too large, and the preload of the threaded bolt was too large, which not only failed to prevent loosening, but also kept the bolts in a stretched state for a long time. Many tiny cracks would be generated at the bottom of the thread groove. As the tunnel boring machine moved forward, backward, turned, and cut and fed, the bolt threads and the internal threads of the main body squeezed and meshed with each other, causing the bolts to break.

[0004] The loosely connected bolt threads are greatly deformed by wear. The internal threads of the main body are deformed into a trapezoidal shape from the deformation point of the thread depth to the outermost part, and the internal thread hole opposite the main body is deformed into an irregular elliptical shape, which is longer in the top and bottom and shorter in the left and right. The walking mechanism through hole and the internal thread of the main body are coaxially radially deformed into a trapezoidal shape with a smaller inside and a larger outside. When the walking mechanism through hole is deformed into an irregular elliptical shape, the inner wall of the through hole is obviously screwed by the bolt.

[0005] The bolt locking method of the prior art is to use steel wire locking, that is, to use steel wire to pass through the nut through hole of the bolt; due to the extremely harsh working conditions underground in coal mines, the bottom plate is soft, and there is often a lot of water accumulation, which causes the walking machine to be in muddy water for a long time, which will cause the steel wire to corrode and lose its anti-loosening performance. The walking part is subjected to the reaction force, overturning moment and dynamic load of the cutting mechanism. Under the action of load changes and impact vibrations, the friction between the threads is unstable and may disappear instantly. If the steel wire locking device fails, it is very easy to cause the connecting rod bolt to loosen. After the bolt is loosened, the walking part is completely immersed in the muddy water, and it cannot tighten the loose bolt in time. After the bolt is loose, it produces mutual friction between it and the threaded rod hole and the web eyelet. Over time, each of them is worn, and the bolt moves in the hole, causing the bolt to break.

[0006] In addition, there is only one vertical positioning key near the shovel end between the tunnel boring machine body and the traveling part. The positioning key bears the load when the tunnel boring machine moves forward and backward. When the tunnel boring machine is excavating the tunnel, the traveling part sometimes leaves the ground under the joint support of the shovel and the rear support. At this time, the bolt bears the downward force generated by the weight of the traveling part itself, causing shear force to be generated in the vertical direction during work. If it is immersed in mud and water, it must overcome the cohesive force of the mud and water, which increases the shear force on the bolt. Utility Model Content

[0007] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide an anchoring positioning structure of the walking part and the main body of a tunnel boring machine, the main body of the tunnel boring machine is fixed on the walking mechanism, the lower connecting plate 1 is provided with a horizontal keyway, the horizontal connecting key is fixed in the horizontal keyway by screws, the upper connecting plate 1 is provided with an upper horizontal connecting groove corresponding to the horizontal key; the lower connecting plate 2 and the upper connecting plate 2 are provided with corresponding pin holes, the positioning pin is inserted into the pin hole; the lower connecting plate 2 is provided with a stop plate, the stop plate is a circular plate, fixed on the lower connecting plate 2; the upper connecting plate 2 is provided with a through hole corresponding to the stop plate; the stop plate is embedded in the through hole.

[0008] There are two horizontal keys and two positioning pins.

[0009] The upper connecting plate 1 and the lower connecting plate 1, as well as the upper connecting plate 2 and the lower connecting plate 2 are all connected by hinge bolts.

[0010] Every 2 hinge bolts form a group and are connected using locking pads.

[0011] The utility model has the advantages of solving the problem of bolts breaking when the traveling mechanism of the tunnel boring machine is in use, and has practical significance for improving the performance and reliability of the tunnel boring machine, and can achieve greater economic benefits with less investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 AA surface screenshot;

[0014] Figure 3 It is a connection diagram of horizontal keys;

[0015] Figure 4 It is a structural schematic diagram of the main part of the tunnel boring machine in the prior art;

[0016] Figure 5 It is a structural schematic diagram of the walking mechanism of the prior art;

[0017] Figure 6 It is a schematic diagram of the coordination between the main part and the traveling mechanism of the tunnel boring machine in the prior art. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings. As shown in the figure, the main body 2 of the tunnel boring machine includes an upper connecting plate 21 close to the shovel end and an upper connecting plate 22 away from the shovel end, and the walking mechanism includes a lower connecting plate 31 corresponding to the upper connecting plate 21 and a lower connecting plate 2 32 corresponding to the upper connecting plate 22; the lower connecting plate 2 32 is close to the driving wheel 34; the lower end of the tunnel boring machine body is in contact with the bottom plate 5 of the walking mechanism.

[0019] The lower connecting plate 1 31 is provided with a horizontal key groove 351, and the horizontal connecting key 35 is fixed in the horizontal key groove 351 by a screw 352. The upper connecting plate 1 21 is provided with an upper horizontal connecting groove 24 corresponding to the horizontal key; the lower connecting plate 2 32 and the upper connecting plate 2 22 are provided with corresponding pin holes, and the positioning pin 36 is inserted into the pin hole; the lower connecting plate 2 32 is provided with a stop plate 7, and the stop plate is a circular plate, which is fixed to the lower connecting plate 2 32 by a hinge bolt 6; the upper connecting plate 22 is provided with a through hole corresponding to the stop plate; the stop plate is embedded in the through hole.

[0020] There are two horizontal keys and two positioning pins.

[0021] The upper connecting plate 1 and the lower connecting plate 1, the upper connecting plate 2 and the lower connecting plate 2 are connected by hinge bolts 6, the rod of the hinge bolts is interference fit with the through holes of the walking mechanism and the through holes of the tunnel boring machine body, and the hinge bolts are tightened in the bolt holes of the walking mechanism (such as Figure 2 ) or through the through hole of the tunnel boring machine body and fixed by nuts (such as Figure 3 ).

[0022] To prevent loosening, every two hinge bolts are grouped together and connected by a stop pad, which has a hole matching the nut of the hinge bolt, the nut is embedded in the hole, and the stop pad is fixed to the walking mechanism by a screw.

[0023] There is a gap in the radial direction between the stop plate and the through hole of the second upper connecting plate to ensure that there is no over-positioning problem.

[0024] The utility model adds a horizontal key and a positioning pin, thereby overcoming the defect of the prior art that the structure has no limited structure in the vertical direction, thereby ensuring the accuracy and firmness of the connection; and the setting of the stop plate further consolidates the stability of the structural connection, thereby ensuring a stable connection between the main part of the tunnel boring machine and the walking mechanism even when the bolts are deformed.

Claims

1. An anchoring structure for a traveling part and a main body of a tunnel boring machine, wherein the main body of the tunnel boring machine is fixed on the traveling mechanism, characterized in that: The lower connecting plate 1 is provided with a horizontal keyway, and the horizontal connecting key is fixed in the horizontal keyway by screws; the upper connecting plate 1 is provided with an upper horizontal connecting groove corresponding to the horizontal key; the lower connecting plate 2 and the upper connecting plate 2 are provided with corresponding pin holes, and the positioning pin is inserted into the pin hole; the lower connecting plate 2 is provided with a stop plate, and the stop plate is a circular plate fixed on the lower connecting plate 2; the upper connecting plate 2 is provided with a through hole corresponding to the stop plate; the stop plate is embedded in the through hole.

2. The anchoring and positioning structure of the traveling part and the main body of the tunnel boring machine according to claim 1 is characterized in that: There are two horizontal keys and two positioning pins.

3. The anchoring and positioning structure of the traveling part and the main body of the tunnel boring machine according to claim 1 is characterized in that: The upper connecting plate 1 and the lower connecting plate 1, as well as the upper connecting plate 2 and the lower connecting plate 2 are all connected by hinge bolts.

4. The anchoring and positioning structure of the traveling part and the main body of the tunnel boring machine according to claim 3 is characterized in that: Every 2 hinge bolts form a group and are connected using locking pads.

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