CN117759239A - Telescopic arm, telescopic cutting device and heading machine operation method - Google Patents

Abstract

The invention belongs to the technical field of tunneling equipment, and particularly relates to a telescopic arm, a telescopic cutting device and a tunneling machine operation method, wherein the telescopic arm comprises an outer cylinder, a telescopic part, a first supporting part and a second supporting part, and the outer cylinder is provided with a first inner cavity extending along a first direction; the two first supporting parts are respectively arranged on two opposite inner walls of the outer cylinder; the telescopic component is arranged in the first inner cavity; the telescopic arm disclosed by the invention has strong torsion resistance and small volume, and can be suitable for tunneling of semi-coal rock and rock roadway with small section.

Description

Telescopic arm, telescopic cutting device and heading machine operation method

Technical Field

The invention belongs to the technical field of tunneling equipment, and particularly relates to a telescopic arm, a telescopic cutting device and a tunneling machine operation method.

Background

The cutting mechanism of the heading machine is mainly responsible for breaking coal and rock on the section of the heading machine, and when the heading machine is not provided with a telescopic mechanism, the feeding action of the cutting mechanism needs to depend on the action of a travelling mechanism, so that the working modes of slotting, shaping and the like of the heading machine mainly depend on the repeated forward and backward movement and the left and right swinging of the travelling mechanism of the heading machine to finally drive the cutting mechanism to a designated position, and the frequent action of the travelling mechanism can cause serious damage to the bottom plate of the heading machine, and meanwhile, the heading efficiency of the heading machine is also influenced.

In the related art, two types of telescopic mechanisms are generally designed for a cutting part of a development machine, one type of telescopic mechanism is cylindrical guide and flat key torsion-resistant, a gap exists in the cylindrical guide of the telescopic mechanism, the flat key or a key slot is easily worn due to vibration generated in the cutting process, finally, the telescopic mechanism is invalid, and the coal roadway cutting vibration is small, so that the telescopic mechanism is mainly suitable for the coal roadway.

The other type of telescopic mechanism is rectangular guide and is simultaneously provided with a clamping oil cylinder, for example, a cutting mechanism disclosed in Chinese patent publication No. CN104389597B adopts the clamping oil cylinders in two directions to eliminate the gap of the rectangular guide mechanism, so that the rectangular guide mechanism can effectively resist cutting vibration, and meanwhile, the rectangular guide mechanism has strong torsion resistance and is suitable for a rock roadway. But the telescopic mechanism adopting rectangular guide is large in size, and finally the whole cutting part and the whole machine are large in size, so that the telescopic mechanism is suitable for large-section tunnels and has poor applicability in coal mines with generally small sections.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the invention provides the telescopic arm which has strong torsion resistance and small volume and can be suitable for tunneling of small-section half coal rocks and rock roadways.

The embodiment of the invention provides a telescopic cutting device.

The embodiment of the invention provides a working method of a heading machine.

According to an embodiment of the invention, a telescopic arm comprises:

an outer barrel having a first lumen extending in a first direction;

the first supporting parts are respectively arranged on two opposite inner walls of the outer cylinder;

the telescopic component is arranged in the first inner cavity;

the first supporting component is correspondingly abutted against the second supporting component to support the telescopic component and limit the telescopic component to rotate, and the second supporting component can move along the first supporting component in the first direction so as to enable the telescopic component to move along the first direction relative to the outer cylinder;

a first driver provided between the outer tube and the telescopic member, the first driver being for driving the telescopic member to move relative to the outer tube;

and a second driver connected to the outer cylinder, at least one of the two first support members being movable relative to the outer cylinder, the second driver being for driving one of the two first support members toward the other, or the second driver being for driving the two first support members toward each other.

The telescopic boom of the embodiment of the invention has strong torsion resistance and small volume, and can be suitable for tunneling of small-section semi-coal rock and rock roadway.

In some embodiments, the first support member has a first face and a second face, and a predetermined angle α is formed between the first face and the second face;

the second supporting component is provided with a third surface and a fourth surface, a preset included angle beta is formed between the third surface and the fourth surface, beta=alpha, the third surface is abutted with the first surface, and the fourth surface is abutted with the second surface.

In some embodiments, the first support member is provided with a first friction block and a second friction block, the first face is located on the first friction block, and the second face is located on the second friction block; and/or

The telescopic component is provided with a groove, the second supporting component comprises a third friction block and a fourth friction block which are arranged in the groove, the third face is positioned on the third friction block, and the fourth face is positioned on the fourth friction block.

In some embodiments, the two first support members are disposed opposite each other along a second direction, the second direction being parallel to a horizontal plane and the first direction being orthogonal to the second direction.

In some embodiments, the outer cylinder is provided with a connecting part, the two first supporting parts are connected to the inner wall of the outer cylinder through the connecting part, the connecting part is provided with a limiting cavity, the first supporting part is provided with an end plate, the end plate is arranged in the limiting cavity, and the end plate in at least one of the two first supporting parts is movable in the second direction.

In some embodiments, the connecting component comprises a mounting table, a baffle and a pressing block, wherein the two mounting tables are oppositely arranged on the inner wall of the outer cylinder along a third direction, the two baffles are oppositely arranged on the outer cylinder along a first direction, the mounting table is provided with the pressing block, the limiting cavity is formed among the mounting table, the baffle and the pressing block, and the pressing block is used for limiting the displacement of the end plate in the second direction;

in at least one of the two connecting members, a width of a limiting cavity between the pressing block and an inner wall of the outer cylinder is larger than a width of the end plate in the second direction;

the first direction, the second direction and the third direction are orthogonal to each other.

In some embodiments, in at least one of the two connection members, an inner width between the two mounting tables is larger than a width of the end plate in the third direction, so that the respective first support member is movable in the third direction within a preset threshold range; and/or

At least one of the two baffles is detachably connected with the outer cylinder; and/or

The action end of the second driver is abutted with the end plate of the corresponding first supporting component; and/or

The second driver comprises a plurality of first hydraulic cylinders which are arranged on the outer cylinder at intervals along a first direction and synchronously act; and/or

The dust-proof device further comprises a dust-proof component which is arranged on the outer cylinder and corresponds to the second supporting component so as to prevent dust from entering between the first supporting component and the second supporting component.

In some embodiments, an upper portion of the first lumen has a first slip plane, an upper portion of the telescoping member has a second slip plane, the first slip plane and the second slip plane abut; and/or

The telescopic component is provided with a second inner cavity, the second inner cavity is used for installing a cutting driver, a first hole is formed in the telescopic component, a second hole and a third hole are formed in the outer cylinder, a cable of the cutting driver is led out of the outer cylinder through the third hole, a first state is arranged between the telescopic component and the outer cylinder, and in the first state, the first hole corresponds to the second hole so as to overhaul equipment in the second inner cavity; and/or

The first driver comprises a second hydraulic cylinder, one end of the second hydraulic cylinder is hinged with the outer cylinder, and the other end of the second hydraulic cylinder is hinged with the telescopic component.

According to an embodiment of the present invention, a telescopic cutting device includes:

a telescopic arm as in any one of the embodiments above;

a cutting driver disposed in the second lumen of the telescoping member;

the cutting head is positioned at the end part of the telescopic component and is in transmission connection with the cutting driving part.

According to the working method of the heading machine, the heading machine comprises the telescopic cutting device, and the heading machine has a first working condition and a second working condition in the heading construction process;

the operation method of the heading machine comprises the following steps:

under the first working condition, driving the first supporting component to abut against the second supporting component so that the friction force between the first supporting component and the second supporting component is larger than a first threshold value and smaller than a second threshold value, wherein the first threshold value is smaller than the second threshold value;

driving the telescopic component to perform telescopic motion relative to the outer cylinder;

and under the second working condition, driving the first supporting component to abut against the second supporting component so that the friction force between the first supporting component and the second supporting component is larger than a third threshold value, and the third threshold value is larger than the second threshold value.

Drawings

Fig. 1 is a schematic structural diagram of a telescopic cutting device according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view taken in the direction A-A of FIG. 1.

Fig. 3 is a schematic cross-sectional view in the direction B-B of fig. 1.

Fig. 4 is a schematic structural diagram of a telescopic cutting device according to another embodiment of the present invention.

Fig. 5 is a schematic perspective view of a telescopic cutting device according to an embodiment of the invention.

Reference numerals:

11. a cutting head; 12. a cantilever section; 13. a speed reducer;

2. an outer cylinder; 21. a first support member; 211. a first friction block; 212. a second friction block; 213. an end plate; 214. a base; 221. a mounting table; 222. a baffle; 223. briquetting; 23. a main connecting lug; 24. a first lumen; 25. a first slip plane; 261. a second hole; 262. a third hole; 27. a second driver; 271. a cylinder; 272. an oil inlet; 273. a piston rod; 274. a seal; 28. a dust-proof member; 29. a cable fixing member;

3. a telescopic member; 31. a groove; 32. a flange plate; 33. a third friction block; 34. a fourth friction block; 35. a second lumen; 36. a first hole; 37. a second slip plane;

5. a first driver; 6. a cutting driver; 61. a cable cavity; 7. a drag chain; 71. a first mount; 72. and a second mounting seat.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

Referring to fig. 1 to 5, a telescopic arm according to an embodiment of the present invention will be described, the telescopic arm including an outer cylinder 2 and a telescopic member 3, the outer cylinder 2 having a first inner cavity 24 extending in a first direction, the telescopic member 3 being provided in the first inner cavity 24, wherein the telescopic member 3 is a cylinder or a rod.

The outer tube 2 is provided with first support members 21, and the two first support members 21 are provided on opposite inner walls of the outer tube 2, respectively. The telescopic member 3 is provided with second support members, the two second support members are respectively arranged on two opposite side walls of the telescopic member 3, the first support member 21 is correspondingly abutted against the second support members to support the telescopic member 3 and limit the rotation of the telescopic member 3, and the second support members are movable along the first support member 21 in a first direction to enable the telescopic member 3 to be movable along the first direction relative to the outer cylinder 2.

It should be understood that the telescopic member 3 is supported on the first supporting member 21 on the outer cylinder 2 through the second supporting member, and the abutting joint of the first supporting member 21 and the second supporting member not only has guiding and supporting effects, but also has torsion resistance, so that the telescopic arm can be prevented from circumferential rotation around the first direction in the swinging process, and the structural stability of the telescopic arm is improved.

A first actuator 5 is arranged between the outer cylinder 2 and the telescopic member 3, the first actuator 5 being arranged to actuate the telescopic member 3 to move relative to the outer cylinder 2. That is, the first actuator 5 is configured to actuate the telescopic arm to move the second support member in the first direction relative to the first support member 21, and the telescopic member 3 also moves in the first direction relative to the outer tube 2.

The outer tube 2 is provided with a second driver 27, at least one of the two first support members 21 being movable relative to the outer tube 2, the second driver 27 being for driving one of the two first support members 21 toward the other, or the second driver 27 being for driving the two first support members 21 toward each other. It will be appreciated that the second actuator 27 may actuate one or both of the first support members 21 to move, effecting clamping of the second support members, i.e. enabling adjustment of the frictional force between the first support members 21 and the second support members. When the telescopic boom moves under different working conditions, the stability of the stress of the telescopic part 3 can be guaranteed by adjusting the friction force between the first supporting part 21 and the second supporting part, and the stability of the whole structure of the telescopic boom is further improved.

The first direction of the embodiment of the present invention is the front-rear direction shown in the figure.

The telescopic boom of the embodiment of the invention has strong torsion resistance and small volume, and can be suitable for tunneling of small-section semi-coal rock and rock roadway.

Optionally, the second driver 27 is shown arranged between one of the first support members 21 and the outer cylinder 2, and the other first support member 21 does not need to be driven by the second driver 27, so that the volume of the telescopic arm is further reduced.

As shown in fig. 2, in some embodiments, the first support member 21 has a first face and a second face with a predetermined angle α therebetween; the second supporting component is provided with a third surface and a fourth surface, a preset included angle beta is formed between the third surface and the fourth surface, beta=alpha, the third surface is abutted against the first surface, and the fourth surface is abutted against the second surface.

Specifically, the included angle α between the first surface and the second surface and the included angle β between the third surface and the fourth surface are smaller than 180 °, the first support member 21 and the second support member are both in V-shaped structures, for example, the first support member 21 is in a convex V-shaped structure, the second support member is in a concave V-shaped structure, for example, the first support member 21 is in a concave V-shaped structure, the second support member is in a convex V-shaped structure, and schematic diagrams of V-shaped structures in which the first support member 21 is convex and the second support member is in a concave V-shaped structure are shown in the drawings of the embodiments of the present invention.

Through the arrangement of the structure, the stability of stress of the telescopic part 3 in different directions can be guaranteed, the overturning resistance moment is improved in the relative movement process of the telescopic part 3 and the outer cylinder 2, the torsion resistance is stronger, the stability is better in the tunneling process of half coal rock or a rock roadway, and in addition, the structures of the first supporting part 21 and the second supporting part can be overlapped together through a V-shaped structure, so that the volume of the telescopic arm is reduced.

Further, according to the embodiment of the invention, the telescopic part 3 can be clamped by driving one of the first supporting parts 21, positioning and clamping in multiple directions in the circumferential direction of the telescopic part 3 can be realized, the second drivers 27 are not required to be arranged in multiple directions, the volume of the telescopic arm can be further reduced, and the tunneling construction practicability in a small-section roadway is better.

As shown in fig. 2, in some embodiments, the first supporting member 21 is provided with a first friction block 211 and a second friction block 212, the first surface is located on the first friction block 211, the second surface is located on the second friction block 212, the telescopic member 3 has a groove 31, the groove 31 is a V-shaped groove, the second supporting member includes a third friction block 33 and a fourth friction block 34 provided in the groove 31, the third surface is located on the third friction block 33, and the fourth surface is located on the fourth friction block 34. It should be understood that the first friction block 211 and the third friction block 33 form a friction pair, the second friction block 212 and the fourth friction block 34 form a friction pair, so that the effective support of the first support component 21 and the second support component can be realized, the friction force between the first support component 21 and the second support component can be effectively controlled, the friction force between the telescopic component 3 and the outer cylinder 2 can be conveniently adjusted, and the thrust of the first driver 5 and the friction force between the telescopic component 3 and the outer cylinder 2 can be conveniently adjusted and controlled.

As shown in fig. 2, in some embodiments, the two first support members 21 are disposed opposite each other along a second direction that is parallel to the horizontal plane and the first direction is orthogonal to the second direction. Two first support parts 21 are oppositely arranged along the second direction, circumferential constraint limit on the telescopic part 3 can be realized, and in the extending and retracting process of the telescopic part 3 and the swinging process of the telescopic arm up and down and left and right, the two first support parts 21 are uniformly stressed, so that the stability is good.

The second direction in the embodiment of the present invention is the left-right direction shown in the figure.

In some embodiments, the outer cylinder 2 is provided with a connecting part, both first supporting parts 21 are connected to the inner wall of the outer cylinder 2 through the connecting part, the connecting part is provided with a limiting cavity, the first supporting parts 21 are provided with end plates 213, the end plates 213 are arranged in the limiting cavity, and the end plates 213 in at least one of the two first supporting parts 21 are movable in the second direction.

It should be understood that the first supporting member 21 includes a base 214, an end plate 213 is provided at one end of the base 214, the first friction block 211 and the second friction block 212 are provided on the base 214 at a predetermined angle α, the first supporting member 21 is supported in a limiting cavity of a connecting member on the outer cylinder 2 by the end plate 213, the end plate 213 is restrained in the limiting cavity, and thus the relative stability of the first supporting members 21 can be ensured, while the end plate 213 on at least one first supporting member 21 can be moved in a second direction in the corresponding limiting cavity, that is, the corresponding first supporting member 21 can be driven to approach the other first supporting member 21 by the second driver 27, thereby clamping the telescopic member 3.

Alternatively, the end plates 213 in both first support members 21 may be moved in the second direction within the spacing cavity.

Alternatively, the end plate 213 of one of the first support members 21 is not movable in the second direction within the spacing cavity, and the end plate 213 of the other first support member 21 is movable in the second direction within the spacing cavity.

As shown in fig. 2, in some embodiments, the connection member includes a mounting table 221, a baffle 222, and a pressing block 223, the two mounting tables 221 are disposed on the inner wall of the outer cylinder 2 in opposition in the third direction, the two baffles 222 are disposed on the outer cylinder 2 in opposition in the first direction, the pressing block 223 is disposed on the mounting table 221, a limiting cavity is formed between the mounting table 221, the baffle 222, and the pressing block 223 is used for limiting the displacement amount of the end plate 213 in the second direction. It should be understood that the two mounting platforms 221 and the two stoppers form rectangular grooves on the inner wall of the outer cylinder 2, which can restrict and limit the movement of the end plate 213 in the first direction and the third direction, and the pressing block 223 can be disposed opposite to the inner wall of the outer cylinder 2, which restricts and limits the movement of the end plate 213 in the second direction.

In at least one of the two connecting members, the width of the limiting chamber between the pressing block 223 and the inner wall of the outer cylinder 2 is larger than the width of the corresponding end plate 213 in the second direction. That is, when the first support member 21 is movable in the second direction, the width H1 of the limiting chamber between the pressing block 223 and the inner wall of the outer cylinder 2 in the connection member corresponding to the first support member 21 is larger than the width H2 of the end plate 213 in the second direction.

The first direction, the second direction and the third direction are orthogonal to each other. The third direction is the up-down direction shown in the figure.

Alternatively, the width of the spacing cavity between the press block 223 in one of the connection members and the inner wall of the outer cylinder 2 is larger than the width of the corresponding end plate 213 in the second direction, and the width of the spacing cavity between the press block 223 in the other connection member and the inner wall of the outer cylinder 2 is equal to the width of the corresponding end plate 213 in the second direction.

Alternatively, the width of the spacing cavity between the press block 223 in both connecting members and the inner wall of the outer cylinder 2 is larger than the width of the corresponding end plate 213 in the second direction. The end plates 213 of the two first support members 21 can be adjusted in the second direction by a small amount, while keeping the small-amount adjusting ability in the second direction in consideration of the machining error.

As shown in fig. 2, in some embodiments, in at least one of the two connection members, an inner width L1 between the two mounting tables 221 is greater than a width L2 of the corresponding end plate 213 in the third direction, so that the corresponding first support member 21 is movable in the third direction within a preset threshold range. It should be appreciated that the inner width between the two mounting platforms 221 is greater than the width of the end plate 213 in the third direction, which may allow for some amplitude adjustment of the end plate 213 in the third direction, while retaining the small amplitude adjustment capability in the third direction in consideration of machining errors.

Alternatively, the inner width between the two mounting tables 221 in one of the connection members is larger than the width of the corresponding end plate 213 in the third direction, and the inner width between the two mounting tables 221 in the other connection member is equal to the width of the corresponding end plate 213 in the third direction.

Alternatively, the inner width between two mounting tables 221 in the two connection members is larger than the width of the corresponding end plate 213 in the third direction.

In the above embodiment, the small-amplitude adjustment of the end plate 213 in the second direction and the third direction can make the fitting degree of the first support member 21 and the second support member better, improve the stability of supporting the telescopic member 3, make the stress of the telescopic arm better, and avoid the problem of stress concentration in the local area.

In some embodiments, at least one of the two baffles 222 is detachably connected with the outer barrel 2. The baffle plates 222 are used for preventing the end plate 213 in the corresponding first support member 21 from being separated from the limiting cavity, and when one baffle plate 222 is removed, the corresponding first support member 21 can be conveniently removed, installed and maintained.

As shown in fig. 2, in some embodiments, the actuation end of the second actuator 27 abuts the end plate 213 of the corresponding first support member 21. The action end of the second driver 27 is abutted against the end plate 213 in a fitting way, so that effective contact of the action end of the second driver 27 and the end plate 213 is guaranteed, but the action end of the second driver 27 is not fixedly connected with the end plate 213, and meanwhile, when the end plate 213 is adjusted in a small amplitude in a third direction, lateral acting force cannot be generated on the second driver 27, the stability of stress of the second driver 27 is guaranteed, and the damage of parts of the second driver 27 caused by the lateral acting force is avoided.

As shown in fig. 3, in some embodiments, the second driver 27 includes a plurality of first hydraulic cylinders that are arranged on the outer cylinder 2 at intervals in the first direction and act synchronously. It should be understood that by arranging a plurality of first hydraulic cylinders, when the first hydraulic cylinders are driven to synchronously act, the corresponding first supporting component 21 can be moved in the second direction as a whole, so that the problem that stress at different positions of the telescopic component 3 is different due to different stress at different positions of the first supporting component 21 in the first direction, stability of the telescopic component 3 is affected, and the problem that stress concentration or clamping of the telescopic component 3 occurs is avoided.

Alternatively, the second actuator 27 includes a cylinder 271, a piston rod 273, an oil inlet 272, and a seal 274, hydraulic oil flows into the cylinder 271 from the oil inlet 272, drives the piston cylinder to move, and the working end of the piston cylinder abuts against the end plate 213, driving the first support member 21 to move toward the other support member.

As shown in fig. 5, in some embodiments, the telescopic arm further includes a dust-proof member 28, the dust-proof member 28 is disposed on the outer cylinder 2, and the dust-proof member 28 corresponds to the second support member to prevent dust from entering between the first support member 21 and the second support member, so that effective contact between the first support member 21 and the second support member is ensured, and friction therebetween is stable in operation during supporting and relative movement.

Optionally, the dust-proof member 28 is a scraper for cleaning the third and fourth faces of the second support member of dust.

As shown in fig. 2, in some embodiments, the upper portion of the first inner cavity 24 has a first sliding surface 25, the upper portion of the telescopic component 3 has a second sliding surface 37, the first sliding surface 25 and the second sliding surface 37 are abutted, so that the telescopic arm can be ensured to be more stable and reliable in the telescopic process, and in the telescopic process of the telescopic component 3, the contact between the first sliding surface 25 and the second sliding surface 37 can play a guiding role and can resist a overturning moment in a certain direction.

As shown in fig. 3, in some embodiments, the telescopic member 3 has a second inner cavity 35, the second inner cavity 35 is used for mounting the cutting driver 6, the telescopic member 3 is provided with a first hole 36, the outer cylinder 2 is provided with a second hole 261 and a third hole 262, the cable of the cutting driver 6 is led out of the outer cylinder 2 through the third hole 262, and a first state is provided between the telescopic member 3 and the outer cylinder 2, in which the first hole 36 corresponds to the second hole 261 for overhauling equipment in the second inner cavity 35.

It will be appreciated that after the cable of the cutting driver 6 exits the telescopic member 3, the outer barrel 2 is withdrawn through the third aperture 262, the first aperture 36 is provided in correspondence with the cutting driver 6, and the second aperture 261 corresponds with the first aperture 36 when the telescopic member 3 and the outer barrel 2 are in the first state, in which case the equipment in the second inner cavity 35 of the telescopic member 3 can be serviced through the first aperture 36 and the second aperture 261.

Optionally, a cover plate is provided over each of the first, second and third holes 36, 261 and 262, or at least over each of the second and third holes 261 and 262.

Optionally, the cable led out from the cable cavity 61 in the cutting driver 6 is led out through the drag chain 7, the first mounting seat 71 at one end of the drag chain 7 is arranged on the telescopic component 3 at the side of the first hole 36, the second mounting seat 72 at the other end of the drag chain 7 is arranged on the outer barrel 2 at the side of the third hole 262, and after the cable of the cutting driver 6 is led out of the outer barrel 2 through the drag chain 7, the cable fixing component 29 is arranged on the outer barrel 2, and the cable fixing component 29 can avoid scattering of the cable, so that the cable can be more orderly, and the cable is finally connected into the electric cabinet of the heading machine.

As shown in fig. 1 and 2, in some embodiments, the first driver 5 includes a second hydraulic cylinder, one end of the second hydraulic cylinder is hinged to the outer cylinder 2, the other end of the second hydraulic cylinder is hinged to the telescopic member 3, and the telescopic action of the second hydraulic cylinder can drive the telescopic member 3 to extend or retract relative to the outer cylinder 2.

Optionally, the second pneumatic cylinders are two groups, the top of the inner cavity of the outer cylinder 2 is provided with an installation cavity, the two groups of second pneumatic cylinders are arranged in the installation cavity side by side, and the two groups of second pneumatic cylinders act synchronously.

The telescopic cutting device according to an embodiment of the present invention comprises the telescopic arm, the cutting driver 6 and the cutting head 11 according to any of the above embodiments, the cutting driver 6 being provided in the second inner cavity 35 of the telescopic member 3; the cutting head 11 is positioned at the end part of the telescopic component 3, and the cutting head 11 is in transmission connection with the cutting driving part.

Specifically, be provided with main engaging lug 23 on the urceolus 2 of flexible arm, cutting driver 6 is cutting motor, cutting motor installs in the second inner chamber 35 of flexible part 3, be provided with reduction gear 13 in the tip of flexible part 3, the ring flange 32 fixed connection of the tip of the casing of reduction gear 13 and flexible part 3, the other end of the casing of reduction gear 13 passes through cantilever section 12 to be connected with cutting head 11, cutting driver 6 passes through the shaft coupling with the input shaft of reduction gear 13 and is connected, the output shaft and the cutting head 11 transmission of reduction gear 13 are connected, during operation, cutting driver 6 drive reduction gear 13 rotates, finally drive cutting head 11 rotates, reach the purpose of breaking coal rock. The first actuator 5 drives the telescopic member 3 to extend and retract relative to the outer tube 2, thereby achieving the extension and retraction of the extension and retraction type cutting device.

According to the working method of the heading machine, the heading machine comprises the telescopic cutting device, and the heading machine has a first working condition and a second working condition in the heading construction process;

the working method of the heading machine comprises the following steps:

under the first working condition, the first supporting part 21 is driven to abut against the second supporting part, so that the friction force between the first supporting part 21 and the second supporting part is larger than a first threshold value and smaller than a second threshold value, wherein the first threshold value is smaller than the second threshold value;

the telescopic part 3 is driven to perform telescopic motion relative to the outer cylinder 2;

under the second working condition, the first supporting component 21 is driven to abut against the second supporting component, so that the friction force between the first supporting component 21 and the second supporting component is larger than a third threshold value, and the third threshold value is larger than the second threshold value. That is, the friction force acting between the telescopic member 3 and the outer tube 2 is greater than the thrust of the first driver 5 to the telescopic member 3, and the telescopic arm does not perform the telescopic action under the second operation condition, while ensuring the stability between the telescopic member 3 and the outer tube 2.

Further, the first working condition is that the heading machine performs a slitting operation or an idle telescopic operation, the first driver 5 overcomes the friction force between the telescopic part 3 and the outer cylinder 2 to push the telescopic part 3 to move forward, then pushes the cutting head 11 to cut forward or move, and the counter force born by the telescopic arm is mainly in the front-back direction, the overturning moment in the up-down direction and the left-right direction is smaller, so that the vibration is smaller, and at the moment, in order to ensure the telescopic stability, the second driver 27 needs to perform an extension action, so that the second supporting part on the telescopic part 3 is attached to the corresponding first supporting part 21, and a gap is eliminated.

The specific operation flow is as follows:

the hydraulic oil having a smaller pressure P1 is supplied through the second driver 27 (clamping cylinder), the second driver 27 includes a piston rod 273 which moves to the other side (right side in the drawing), and the piston rod 273 in turn pushes the first support member 21 of one side (left side in the drawing), the telescopic member 3, and the first support member 21 of the other side (right side in the drawing) to be pressed against the inner wall of the outer cylinder 2, so that there is no gap between the two first support members 21 symmetrically arranged and the second support member on the middle telescopic member 3, and at the same time, friction blocks mounted on the first support member 21 and friction blocks mounted in the second support member on the telescopic member 3 form a friction pair for relative friction. The first driver 5 then pushes the telescopic member 3 forward, completing the slitting or idle movement of the cutting head 11. The hydraulic oil with smaller pressure P1 is mainly provided in this working condition to reduce the friction force (the friction force is in a proportional relationship with the positive pressure) between the friction pair (i.e. the first supporting component 21 and the second supporting component) pressed by each other, so that the first driver 5 (telescopic cylinder) can still provide enough slitting force while overcoming the friction force.

The second working condition is that the heading machine performs up-down and left-right swing cutting, the overturning moment in the up-down and left-right directions is larger, the vibration is relatively larger, and the telescopic action is very easy to accelerate the abrasion or damage of the telescopic arm at the moment, so that when the heading machine performs up-down and left-right swing cutting, the friction in the telescopic arm is ensured to mutually compress and cannot act, and the influence of cutting vibration on the telescopic mechanism is reduced.

The specific operation flow is as follows:

the hydraulic oil with larger pressure P2 enters the second driver 27 on one side (left side in the drawing) through the oil inlet 272 of the second driver 27 (clamping oil cylinder), the piston rod 273 of the second driver 27 is pushed to move towards the second driver 27 on the other side (right side in the drawing), the piston rod 273 then pushes the first supporting component 21 on one side (left side in the drawing), the telescopic component 3 and the first supporting component 21 on the other side (right side in the drawing) to be pressed towards the inner wall of the outer cylinder 2, so that gaps are not reserved between the two first supporting components 21 which are symmetrically arranged and the second supporting component on the middle telescopic component 3, and the two first supporting components are pressed mutually with larger pressure, so that the thrust of the first driver 5 (the telescopic oil cylinder) is smaller than the friction force between a friction pair (namely the first supporting component 21 and the second supporting component), the telescopic arm cannot be in telescopic action under the condition, and the working condition damage of the telescopic mechanism is effectively guaranteed.

The telescopic arm adopts a dovetail groove-like guiding mode, the guiding mode not only can restrict the telescopic direction, but also can resist larger cutting torque, compared with a flat key torsion-resistant mode in the related art, the dovetail groove-like torsion-resistant mode has larger torsion-resistant capability, and is suitable for half coal rock and rock lanes; in the related art, the rectangular telescopic mechanism needs to be additionally provided with the clamping oil cylinders at least in two directions, and the overall telescopic mechanism is larger than the embodiment of the invention in volume, so that the construction operation in a small-section roadway is not facilitated.

The telescopic arm in the embodiment of the invention ensures that no gap exists between friction pairs of the telescopic mechanism during action by arranging the second driver 27 (the clamping oil cylinder) at one side, and the telescopic action or the slitting operation is more stable and reliable.

In the vertical and horizontal swing cutting process of the telescopic arm, the friction pair is in a mutually clamped state under the action of the second driver 27 (the clamping oil cylinder), the telescopic part 3 and the outer cylinder 2 cannot act, the influence of cutting vibration on a telescopic mechanism can be greatly reduced, and the reliability of the telescopic arm is improved.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A telescoping arm, comprising:

an outer barrel having a first lumen extending in a first direction;

the first supporting parts are respectively arranged on two opposite inner walls of the outer cylinder;

the telescopic component is arranged in the first inner cavity;

the first supporting component is correspondingly abutted against the second supporting component to support the telescopic component and limit the telescopic component to rotate, and the second supporting component can move along the first supporting component in the first direction so as to enable the telescopic component to move along the first direction relative to the outer cylinder;

a first driver provided between the outer tube and the telescopic member, the first driver being for driving the telescopic member to move relative to the outer tube;

and a second driver connected to the outer cylinder, at least one of the two first support members being movable relative to the outer cylinder, the second driver being for driving one of the two first support members toward the other, or the second driver being for driving the two first support members toward each other.

2. The telescopic arm according to claim 1, wherein the first support member has a first face and a second face, the first face and the second face having a predetermined angle α therebetween;

the second supporting component is provided with a third surface and a fourth surface, a preset included angle beta is formed between the third surface and the fourth surface, beta=alpha, the third surface is abutted with the first surface, and the fourth surface is abutted with the second surface.

3. The telescopic boom according to claim 2, wherein the first support member is provided with a first friction block and a second friction block, the first face being located on the first friction block and the second face being located on the second friction block; and/or

The telescopic component is provided with a groove, the second supporting component comprises a third friction block and a fourth friction block which are arranged in the groove, the third face is positioned on the third friction block, and the fourth face is positioned on the fourth friction block.

4. A telescopic arm according to any of claims 1-3, wherein two of the first support members are oppositely arranged along a second direction, the second direction being parallel to the horizontal plane and the first direction being orthogonal to the second direction.

5. The telescopic arm according to claim 4, wherein a connecting member is provided on the outer cylinder, both the first support members are connected to the inner wall of the outer cylinder by the connecting member, the connecting member has a limiting chamber, the first support member has an end plate provided in the limiting chamber, and the end plate in at least one of the two first support members is movable in the second direction.

6. The telescopic boom according to claim 5, wherein the connecting member comprises a mounting table, a baffle and a pressing block, the two mounting tables are oppositely arranged on the inner wall of the outer cylinder along a third direction, the two baffles are oppositely arranged on the outer cylinder along a first direction, the pressing block is arranged on the mounting table, the limiting cavity is formed among the mounting table, the baffle and the pressing block, and the pressing block is used for limiting the displacement of the end plate in the second direction;

in at least one of the two connecting members, a width of a limiting cavity between the pressing block and an inner wall of the outer cylinder is larger than a width of the end plate in the second direction;

the first direction, the second direction and the third direction are orthogonal to each other.

7. The telescopic arm according to claim 6, wherein in at least one of the two connecting members, an inner width between the two mounting tables is larger than a width of the end plate in the third direction, so that the respective first supporting member is movable in the third direction within a preset threshold range; and/or

At least one of the two baffles is detachably connected with the outer cylinder; and/or

The action end of the second driver is abutted with the end plate of the corresponding first supporting component; and/or

The second driver comprises a plurality of first hydraulic cylinders which are arranged on the outer cylinder at intervals along a first direction and synchronously act; and/or

The dust-proof device further comprises a dust-proof component which is arranged on the outer cylinder and corresponds to the second supporting component so as to prevent dust from entering between the first supporting component and the second supporting component.

8. The telescoping arm of claim 1, wherein an upper portion of the first lumen has a first slip plane and an upper portion of the telescoping member has a second slip plane, the first slip plane and the second slip plane abutting; and/or

The telescopic component is provided with a second inner cavity, the second inner cavity is used for installing a cutting driver, a first hole is formed in the telescopic component, a second hole and a third hole are formed in the outer cylinder, a cable of the cutting driver is led out of the outer cylinder through the third hole, a first state is arranged between the telescopic component and the outer cylinder, and in the first state, the first hole corresponds to the second hole so as to overhaul equipment in the second inner cavity; and/or

The first driver comprises a second hydraulic cylinder, one end of the second hydraulic cylinder is hinged with the outer cylinder, and the other end of the second hydraulic cylinder is hinged with the telescopic component.

9. A retractable cutting device, comprising:

a telescopic arm as claimed in any one of claims 1 to 8;

a cutting driver disposed in the second lumen of the telescoping member;

the cutting head is positioned at the end part of the telescopic component and is in transmission connection with the cutting driving part.

10. A method of operating a heading machine, the machine comprising the telescopic cutting apparatus of claim 9, the machine having a first operating condition and a second operating condition during a heading construction;

the operation method of the heading machine comprises the following steps:

under the first working condition, driving the first supporting component to abut against the second supporting component so that the friction force between the first supporting component and the second supporting component is larger than a first threshold value and smaller than a second threshold value, wherein the first threshold value is smaller than the second threshold value;

driving the telescopic component to perform telescopic motion relative to the outer cylinder;

and under the second working condition, driving the first supporting component to abut against the second supporting component so that the friction force between the first supporting component and the second supporting component is larger than a third threshold value, and the third threshold value is larger than the second threshold value.