CN210768751U

CN210768751U - Roadway cutting device and heading machine

Info

Publication number: CN210768751U
Application number: CN201921088929.9U
Authority: CN
Inventors: 郭吉昌; 姜鹏飞; 王子越; 刘畅
Original assignee: Tiandi Science and Technology Co Ltd
Current assignee: Ccteg Coal Mining Research Institute Co ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-06-16
Anticipated expiration: 2029-07-12

Abstract

The utility model relates to a tunnelling technical field provides a tunnel cutting device and entry driving machine. Roadway cutting device includes: a linear transmission mechanism; the first end of the rocker arm is connected to the linear transmission mechanism and moves along the linear transmission direction of the linear transmission mechanism, the first end of the rocker arm is hinged with the linear transmission mechanism, the second end of the rocker arm is connected with the cutting head, and the cutting head rotates relative to the second end. The utility model discloses a tunnel cutting device of sharp drive mechanism and rocking arm, for current cutting unit including cantilever type, drum-type and full section formula cutting unit, this kind of tunnel cutting device can realize the sectional tunnelling of various shapes in tunnel, and cutting unit shared space is littleer, and cutting efficiency is higher, and is better to the sectional adaptability of different cutings, can effectively improve the tunnelling speed and the efficiency of construction in tunnel.

Description

Roadway cutting device and heading machine

Technical Field

The utility model relates to a tunnelling technical field especially relates to a tunnel cutting device and entry driving machine.

Background

At present, coal roadway excavation in China faces the problems of low roadway forming speed, low level of mechanization and automation and the like. The contradiction between the working face stoping speed and the roadway forming speed leads to the tension of mining continuation, and further improvement of scientific coal yield is hindered.

The tunneling equipment and the tunneling process are one of key factors influencing the tunneling speed and the tunneling efficiency of a roadway, wherein the design and the construction process of the cutting part are main factors influencing the tunneling speed and the tunneling efficiency.

At present, the cutting part of the coal roadway heading machine is designed into three forms, namely a cantilever type, a drum type and a full-section type. The corresponding heading machines are respectively a cantilever type heading machine, a drum type heading machine and a full-face type heading machine.

The boom-type roadheader is represented by the EBZ series (e.g., EBZ160) manufactured by shanxi tianjikui coal equipment ltd. The cantilever type heading machine is a main machine type for coal roadway heading at present, but has the problems of longer cantilever, overlarge occupied space and the like. Secondly, the cantilever type excavator needs to move the machine body left and right in the tunneling construction of the roadway to realize the cutting of the full section of the roadway, the time consumption is longer, and further improvement of the tunneling efficiency is hindered.

The drum-type heading machine does not need to move the machine body left and right during working, roadway section cutting can be realized in situ, and a typical machine type is MB670 of Sandvik company. The cutting mode of the machine type faces the following problems in actual construction. Firstly, the roller is long, the cutting resistance is large, the power requirement on the development machine is high, when the development machine meets a fault and a rock stratum, the development is difficult, and the adaptability to different rock stratums is poor. Secondly, because horizontal drum can not angle regulation, consequently, drum-type cutting mode is difficult to satisfy the tunnelling construction operating mode in slope roof tunnel. Finally, the drum-type cutting mode is easy to cause the collapse of the top plate because the cutting part is longer and the disturbance to the top plate is larger in the cutting process.

The full-face tunneling machine is relatively few in application and is still in a research and development test stage, and typically, the full-face rectangular tunneling machine MJJ 3800X 5800 developed by Shanghai research institute of China coal science and engineering group is available. The cutting mechanism of the full-face tunneling machine can cut and propel the full face of the roadway at one time. The full-face heading machine has the following problems in coal mine tests: the whole machine is heavy and is difficult to adapt to the conditions of a soft or large-gradient bottom plate in a coal mine; secondly, a certain cutting blind area usually exists during full-section cutting; thirdly, the resistance of full-section propulsion is very large, and when the full-section propulsion meets rocks, the situation that the propulsion cannot be performed often exists; fourthly, the direction of the full-face cutting mechanism is difficult to control, and the deviation of the tunneling direction is easy to cause; fifthly, when the section is cut, the tunneling head is closed, and carbon monoxide or gas is easy to exceed the limit.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

One of the purposes of the utility model is that: the utility model provides a tunnel cutting device, solves among the prior art cantilever type, drum-type and full section formula cutting unit problem that exists in the middle of the cutting process.

In order to realize this purpose, the utility model provides a tunnel cutting device, include:

a linear transmission mechanism;

the first end of the rocker arm is connected to the linear transmission mechanism and moves along the linear transmission direction of the linear transmission mechanism, the first end of the rocker arm is hinged with the linear transmission mechanism, the second end of the rocker arm is connected with the cutting head, and the cutting head rotates relative to the second end.

In one embodiment, the linear transmission mechanism is a ball screw assembly, the ball screw assembly includes a screw and a slider sliding relative to the screw, and the first end of the rocker arm is hinged to the slider.

In one embodiment, the sliding block is mounted on the screw rod through a nut, a bearing is arranged between the nut and the sliding block, the nut is connected with a first driving piece and rotates along the screw rod under the action of the first driving piece, two ends of the screw rod are connected with fixed end heads, the fixed end heads are connected with a machine body connecting piece, and the sliding block is hinged with the first end of the rocker arm.

In one embodiment, the roadway cutting apparatus further comprises a second drive and a third drive;

the second driving piece is positioned in the rocker arm and used for driving the rocker arm to swing relative to the linear transmission mechanism;

the third driving piece is positioned inside the cutting head and used for driving the cutting head to rotate relative to the rocker arm.

In one embodiment, the first, second and third drives each comprise a hydraulic motor and a reducer connected to an output of the hydraulic motor.

In one embodiment, the linear transmission mechanism is a rack and pinion mechanism, the rack and pinion mechanism includes a fixed rack and a gear capable of rotating relative to the rack, and the first end of the rocker arm is hinged to the gear.

In one embodiment, the linear transmission mechanism is a linear motor, and comprises a linear output component, and the linear output component is hinged with the first end.

In one embodiment, the length of the rocker arm is greater than half of the roadway height.

In one embodiment, the number of rocker arms is at least two.

In order to realize this purpose, the utility model provides a heading machine, including the heading machine fuselage, still include above-mentioned tunnel cutting device, tunnel cutting device install in the fuselage, the rocking arm satisfies: the first end of the rocker arm moves along the horizontal center line of the roadway to be processed.

The technical scheme of the utility model has following advantage: the utility model discloses a tunnel cutting device of sharp drive mechanism and rocking arm, for current cutting unit including cantilever type, drum-type and full section formula cutting unit, this kind of tunnel cutting device can realize the sectional tunnelling of various shapes in tunnel, and cutting unit shared space is littleer, and cutting efficiency is higher, and is better to the sectional adaptability of different cutings, can effectively improve the tunnelling speed and the efficiency of construction in tunnel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an axial view of a roadway cutting device in an embodiment of the present invention;

figure 2 is a schematic front view of a roadway cutting device in a roadway according to an embodiment of the present invention;

fig. 3 is a schematic view of the working state of the roadway cutting device in one of the states in the roadway according to the embodiment of the present invention;

fig. 4 is a schematic view of the working state of the roadway cutting device in another state in the roadway according to the embodiment of the present invention;

FIG. 5 is a schematic view of the relationship between the roadway cutting apparatus and the roadway cross-section in an embodiment of the present invention;

in the figure: 1. a cutting head; 2. a rocker arm; 3. a speed reducer; 4. a hydraulic motor; 5. a lead screw; 6. a sliding guide rail; 7. a slider; 8. fixing the end head; 9. a fuselage connection; 10. roadway section; 11. and (5) laneways.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, according to an embodiment of the present invention, a roadway cutting apparatus is provided, which includes a linear transmission mechanism (one of which is a ball screw pair mentioned later, including a screw 5 and a slide 7 sliding relative to the screw) and a rocker arm 2. Wherein, 2 first ends of rocking arm are connected to linear drive mechanism and move along linear drive mechanism's sharp transmission direction, and 2 first ends of rocking arm and linear drive mechanism articulate in order to swing relative linear drive mechanism. The second end of the rocker arm 2 is connected with the cutting head 1, and the cutting head 1 rotates relative to the second end.

The cantilever that exists to cantilever type cutting units is longer, occupation space is too big, need remove fuselage scheduling problem about: the roadway cutting device rocker arm 2 and the linear transmission mechanism of the embodiment occupy small space. And the cutting of the roadway section can be realized through the motion of the rocker arm 2 along the linear transmission direction of the linear transmission mechanism and the swing of the rocker arm 2, so that the roadway cutting device does not need to move the machine body of the heading machine, and further the heading efficiency can be improved.

The cutting resistance to the drum-type heading machine is large, the angle can not be adjusted, the disturbance to the top plate is large, and the like: the roadway cutting device of the embodiment realizes cutting through the rotation of the cutting head 1, and the resistance is small. In addition, the position of the cutting head 1 can be adjusted by swinging the rocker arm 2 and moving the second end of the rocker arm 2 along the linear transmission direction of the linear transmission mechanism, so that the problems that the horizontal drum of the drum-type heading machine cannot adjust the angle and the disturbance is large can be solved.

The problems of large resistance and difficult direction control existing in a full-face heading machine are solved: the roadway cutting device of the embodiment realizes cutting through the autorotation of the cutting head 1, and the resistance is small; the cutting resistance and the advancing resistance of the heading machine can be further reduced by adjusting the size of the cutting head. In addition, the cutting part is relatively short and is tightly connected with the tunneling machine body, so that the tunneling advancing direction can be well adjusted by adjusting the moving direction of the tunneling machine, and the tunneling direction is easy to adjust and control.

To sum up, the tunnel cutting device including linear drive mechanism and rocking arm 2 of embodiment for current cutting unit including cantilever type, drum-type and full section formula cutting unit, this kind of tunnel cutting device can realize the sectional tunnelling of various shapes in tunnel, and cutting unit occupation space is littleer, and cutting efficiency is higher, and is better to the sectional adaptability of different cuts, can effectively improve the tunnelling speed and the efficiency of construction in tunnel.

It is worth mentioning that the roadway cutting device of the embodiment can realize the tunneling of the rectangular section of the roadway.

The "linear transmission direction of the linear transmission mechanism" refers to a linear movement direction of the slider 7, a linear movement direction of the gear center, a linear movement direction of the linear output member, and the like, which will be mentioned later.

In fig. 1, the linear transmission mechanism is a ball screw assembly, the ball screw assembly includes a screw 5 and a slider 7 sliding relative to the screw 5, and the slider 7 is hinged to the first end of the rocker arm 2. The sliding block 7 moves linearly along the screw rod 5, and then drives the first end of the rocker arm 2 to move linearly along the screw rod 5.

In one embodiment, the slide 7 is mounted to the lead screw 5 by a nut, between which a bearing is arranged, and the nut is connected to the first driving member and is rotated along the lead screw 5 by the first driving member. Because the bearing is arranged between the nut and the sliding block 7, when the nut rotates, the sliding block 7 does not rotate along with the nut, but does linear motion relative to the screw rod 5 along with the nut. Wherein, fixed end 8 is connected at lead screw 5 both ends, and fixed end 8 connects fuselage connecting piece 9, and then lead screw 5 can be installed to the fuselage of entry driving machine through fixed end 8 and fuselage connecting piece 9. On the basis, the first end of the rocker arm 2 is hinged with the sliding block 7, and the first end of the rocker arm 2 can swing relative to the sliding block 7 while moving linearly along with the sliding block 7.

Of course, the connection relationship between the lead screw 5 and the slider 7 is not limited by the above-described examples. For example, in another embodiment, the screw 5 is mounted at both ends to the body by bearings. The lead screw 5 is connected with the first driving piece and rotates under the action of the first driving piece. The slider 7 is installed on the lead screw 5 through the nut, and when the lead screw 5 rotated, the nut was linear motion relatively to the lead screw 5, and then the nut drove the slider 7 and is linear motion relatively to the lead screw 5. And, the first end of rocking arm 2 is articulated with slider 7, and then rocking arm 2 first end is along lead screw 5 linear motion along with slider 7.

In order to achieve the swinging of the rocker arm 2 and the spinning of the cutting head 1, there must be a corresponding second drive connected to the rocker arm 2 and a third drive connected to the cutting head 1. It is clear that the specific forms and the arrangement positions of the above mentioned first driving element, second driving element and third driving element are not limited, as long as the linear transmission mechanism can be driven to work, the rocker arm 2 can swing and the cutting head 1 can rotate respectively.

In one embodiment, the second driving member is located inside the rocker arm 2 and is used for driving the rocker arm 2 to swing relative to the linear transmission mechanism; the third driving member is located inside the cutting head 1 and is used for driving the cutting head 1 to rotate relative to the rocker arm 2. Under this kind of circumstances, second driving piece and third driving piece are owing to be located rocking arm 2 and cutterhead 1 inside respectively, and then can prevent that second driving piece and third driving piece from damaging under the external environment effect, prolong the life of second driving piece and third driving piece, reduce the maintenance cost of second driving piece and third driving piece.

In one embodiment, the first, second and third drives each comprise a hydraulic motor 4, and a reducer 3 connected to an output of the hydraulic motor 4. Wherein, there is not the explosion-proof problem in hydraulic motor 4, consequently need not additionally to set up explosion-proof equipment when being applicable to tunnel cutting device, and then can control tunnel cutting device and even the volume of entry driving machine. The output end of the hydraulic motor 4 is connected with the speed reducer 3 because the rotating speed of the hydraulic motor 4 is generally higher, and the rocker arm 2 and the cutting head 1 meet corresponding movement requirements through the matching of the hydraulic motor 4 and the speed reducer 3.

Referring to fig. 2, a schematic view of the mounting of the hydraulic motor 4 and the retarder 3 in the first drive member is shown in fig. 2. Specifically, the hydraulic motor 4 is connected to the speed reducer 3, and the speed reducer 3 is connected to a bolt (not shown in fig. 2) disposed inside the slider 7 to rotate the bolt.

As can be seen from fig. 1 to 4, when the hydraulic motor 4 and the reducer 3 in the first driving member are both connected to the sliding block 7, in order to ensure the reliability of the installation of the sliding block 7, the laneway cutting device is further provided with a sliding guide 6, and the sliding block 7 is arranged on the sliding guide 6 and slides along the sliding guide 6 while the sliding block 7 slides along the lead screw 5.

The linear transmission mechanism may adopt any structure form disclosed in the prior art, such as a gear rack, a linear motor, a hydraulic oil cylinder, a chain wheel and the like, besides the ball screw pair mentioned above.

When the linear transmission mechanism is a gear rack, the rack is fixed, and the gear can rotate relative to the rack. In this case, the first end of the rocker arm 2 can swing relative to the gear mechanism while moving along the rack by only articulating the gear with the first end of the rocker arm 2.

When the linear transmission mechanism is a linear motor, the linear motor comprises a linear output part, and the first end of the rocker arm 2 is hinged with the linear output part. Furthermore, the first end of the rocker arm 2 can swing relative to the linear output member while moving linearly with the linear output member.

In one embodiment, the length of the rocker arm 2 is greater than half the roadway height, in which case the swing angle of the rocker arm 2 is less than 180 degrees. Specifically, in order to ensure the entry and exit of the heading machine, the movement amplitude of the first end of the rocker arm 2 should be smaller than the width of the roadway, and the size of the linear transmission mechanism along the linear transmission direction of the linear transmission mechanism is inevitably smaller than the width of the roadway. Assuming that the installation of the roadway cutting device on the body of the heading machine meets the following requirements: when the rocker arm 2 swings up and down, the upward swing angle and the downward swing angle of the rocker arm are the same relative to the horizontal plane. On the basis, if a rectangular tunnel section is to be machined, in order to ensure the machining of four corners of the rectangular tunnel, the length of the rocker arm 2 is inevitably greater than half of the height of the tunnel.

Referring to fig. 3 and 4, the linear transmission mechanism is installed in the middle of the tunnel 11 and is horizontally disposed. In this case, the swing arm 2 swings upward and downward at the same angle with respect to the horizontal plane. It can also be seen from fig. 3 and 4 that to produce the rectangular tunnel profile 10 in fig. 3 and 4, the length of the rocker arm 2 must be greater than half the height of the tunnel. In this case, however, the rocker arm 2 can only rock in the left or right half of the circumference in fig. 3 and 4.

When the number of the rocker arms 2 is only one and the length of the rocker arms 2 is greater than half of the height of the roadway, in order to process a rectangular roadway section, the rocker arms 2 swing on one side of the circumference (assuming that the rocker arms 2 swing on the left half circle of the circumference), and meanwhile, the first ends of the rocker arms 2 are controlled to move along the linear transmission direction of the linear transmission mechanism until the rocker arms 2 move to the right end limit position of the linear transmission mechanism. At the moment, the heading machine exits the roadway, so that the rocker arm 2 rotates to the other side, then the heading machine drives the roadway cutting device to enter the roadway again, the rocker arm 2 drives the cutting head 1 to swing in the right half circle of the circumference, and meanwhile, the first end of the rocker arm 2 is controlled to move towards the left along the linear transmission direction of the linear transmission mechanism, and the machining of the remaining roadway section is completed.

In one embodiment, the number of rocker arms 2 is at least two. Furthermore, the cutting heads 1 on the plurality of rocker arms 2 work simultaneously, and the cutting efficiency is high.

Referring to fig. 3 and 4 again, when the length of the rocker arm 2 is greater than half of the roadway height and the number of the rocker arms 2 is two, the left half circle of the rocker arm 2 drives the cutting head 1 to swing in the left half circle of the circumference, and the right half circle of the rocker arm 2 drives the cutting head 1 to swing in the right half circle of the circumference. In addition, in normal cutting, the heading machine provided with the roadway cutting device only needs to move in the advancing direction, does not need to move left and right as a whole, and does not need to move back and forth repeatedly, so that the heading efficiency is higher.

When the left rocker arm 2 and the right rocker arm 2 both reach the middle position of the linear transmission mechanism, a similar circular area is not cut on the section of the roadway at the moment. Furthermore, in order to ensure the processing of the tunnel cross section, please refer to fig. 4, the first end of the right rocker arm 2 is retracted to the right end of the linear transmission mechanism, the first end of the left rocker arm 2 goes over the middle position of the linear transmission mechanism and continues to make linear motion along the linear transmission mechanism, and finally the cutting forming of the rectangular tunnel cross section is completed. Or the first end of the left rocker arm 2 returns to the left end of the linear transmission mechanism, and the first end of the right rocker arm 2 passes through the middle position of the linear transmission mechanism and continues to do linear motion along the linear transmission mechanism, so that the cutting forming of the rectangular roadway section is finally completed.

According to the roadway cutting device, when the cutting head 1 rotates, the two rocker arms 2 swing up and down simultaneously to cut the upper part and the lower part of the roadway.

Above-mentioned tunnel cutting device can program the cutting orbit of planning tunnel cutting device in advance, and then easily realize the automated control of cutting orbit to easily realize the automatic cut of entry driving machine, can effectively reduce the operating personnel of entry driving machine, reduce the cost of labor. Compared with a drum-type cutting scheme and a cantilever-type cutting scheme, the structural form of the rocker arm 2 and the linear transmission mechanism has the advantage that the cutting head 1 can be machined to be smaller, so that the disturbance to a roadway roof is smaller. In addition, the space occupation of the rocker arm 2 and the linear transmission mechanism is smaller, so that the empty top distance is smaller, and the construction danger brought by the empty top distance can be effectively reduced.

Fig. 5 shows a schematic view of the roadway cutting device for machining a roadway section 10.

The roadway cutting device takes the situation that the linear transmission mechanism is taken as a ball screw pair as an example, and the construction process is as follows:

firstly, the cutting head 1 realizes the cutting feed action of cutting by the propelling force of the machine body of the development machine;

as shown in fig. 3 and 4, the two swing arms 2 swing up and down simultaneously to realize cutting. In the design of the roadway cutting device, the length of the rocker arm 2 is greater than one half of the roadway height, so that the rocker arm 2 cannot swing to a vertical position (or exceed the cutting section), and the rocker arm 2 can only swing up and down within a certain range and cannot rotate by more than 180 degrees;

the two rocker arms 2 simultaneously swing up and down to cut and slide left and right, and when the sliding blocks 7 connected with the two rocker arms 2 meet at the middle position of the screw rod 5, the part which is not cut is approximately circular.

At this time, one of the sliders 7 is moved to one end of the screw 5 (as shown in fig. 4, the right slider 7 is moved to the right end of the screw 5), and the other slider 7 continues to move transversely and simultaneously swings up and down to cut, thereby realizing the cutting formation of a rectangular cross section. On the contrary, the left side slide block 7 moves to the leftmost end of the lead screw 5, the right side slide block 7 continues cutting, and the process is the same.

In another embodiment, the construction process of the roadway cutting device is as follows:

the cutting head 1 realizes the cutting feed action through the propelling force of the development machine body;

after feeding, the rocker arms 2 do not swing, the two rocker arms 2 are driven by the linear transmission mechanism to horizontally cut, and then the rocker arms rotate for an angle and are driven by the linear transmission mechanism to horizontally cut. Finally the uncut portion is still an approximately circular area in the center.

For the approximately circular area located at the center, the cutting method is similar to the latter half of the construction process.

According to the utility model discloses an embodiment provides a heading machine, including the heading machine fuselage, still include above-mentioned tunnel cutting device, tunnel cutting device install in the fuselage.

In one embodiment, the rocker arm 2 satisfies: the first end of the rocker arm 2 moves along the horizontal center line of the roadway to be processed. That is, the linear transmission mechanism is arranged corresponding to the horizontal center line of the roadway to ensure that the upward rotating angle and the downward rotating angle of the rocker arm 2 relative to the horizontal plane are the same.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims

1. A roadway cutting apparatus, comprising:

a linear transmission mechanism;

2. The roadway cutting apparatus of claim 1, wherein the linear transmission mechanism is a ball screw assembly, the ball screw assembly includes a screw and a slide block sliding relative to the screw, and the first end of the rocker arm is hinged to the slide block.

3. The roadway cutting device of claim 2, wherein the sliding block is mounted on the lead screw through a nut, a bearing is arranged between the nut and the sliding block, the nut is connected with a first driving member and rotates along the lead screw under the action of the first driving member, two ends of the lead screw are connected with fixed ends, the fixed ends are connected with a machine body connecting member, and the sliding block is hinged with the first end of the rocker arm.

4. The roadway cutting apparatus of claim 3, further comprising a second drive member and a third drive member;

5. The roadway cutting apparatus of claim 4, wherein the first, second and third drives each comprise a hydraulic motor and a reducer connected to an output of the hydraulic motor.

6. The roadway cutting apparatus of claim 1, wherein the linear transmission mechanism is a rack and pinion mechanism, the rack and pinion mechanism includes a fixed rack and a gear rotatable relative to the rack, and the first end of the rocker arm is hinged to the gear.

7. The tunneling cutting apparatus of claim 1, wherein the linear drive mechanism is a linear motor including a linear output member, the linear output member being hingedly connected to the first end.

8. The roadway cutting apparatus of any one of claims 1 to 7, wherein the length of the rocker arm is greater than half the height of the roadway.

9. The roadway cutting apparatus of any one of claims 1 to 7, wherein the number of the rocker arms is at least two.

10. A heading machine comprising a heading machine body, and characterized in that it further comprises a roadway cutting device according to any one of claims 1 to 9, said roadway cutting device being mounted to said body, said rocker arm satisfying: the first end of the rocker arm moves along the horizontal center line of the roadway to be processed.