Telescopic mechanism type partial-section vertical shaft cutting mechanism and cutting process thereof

Abstract

The invention discloses a telescopic mechanism type partial-section vertical shaft cutting mechanism and a cutting process thereof. The cutting mechanism comprises a swing mechanism, a telescopic mechanism, a cutting head, a swing oil cylinder and a limiting structure. The telescopic mechanism comprises a circular outer barrel, a telescopic part and a telescopic oil cylinder, the telescopic part and the telescopic oil cylinder are matched with the circular outer barrel, the circular outer barrel is hinged to the swing mechanism, the telescopic part is slidably connected with the circular outer barrel, and the telescopic oil cylinder is installed on the circular outer barrel and connected with the telescopic part; the cutting head is installed at the end, away from the telescopic mechanism, of the telescopic piece. The other end of the swinging oil cylinder is hinged with the circular outer barrel; the limiting structure is arranged on the circular outer cylinder and the telescopic piece and used for limiting the telescopic piece to rotate around the axis of the telescopic piece. The telescopic structure solves the problem that a telescopic structure of an existing vertical shaft cutting mechanism is low in reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground coal mine transportation equipment, and in particular relates to a telescopic mechanism-type partial-section vertical shaft cutting mechanism and a cutting process thereof. Background Art

[0002] As an important part of coal mine development, the shaft is the throat project for entering underground mining, a safe passage to ensure the transportation or lifting of personnel, equipment, materials, resources, etc., and the primary project for underground coal resource mining. At present, in addition to the conventional drilling and blasting well drilling technology, mechanized drilling technology equipment includes reverse drilling rigs, shaft boring machines (such as partial section cutting tunneling, large diameter rotary table full section tunneling, caisson tunneling, etc.), and shaft drilling rigs (such as large diameter shaft drilling first and then expansion, small diameter shaft one-time drilling, etc.). Rock breaking tools include full section disc cutters, reverse drilling rig tooth cutters, and partial section pick cutters. In view of the problems of low cutting efficiency and low reliability of telescopic arms under medium soft rock geological conditions, it is necessary to provide a circular telescopic cylinder type partial section shaft cutting mechanism and cutting process to solve the above problems. Summary of the invention

[0003] The purpose of the present disclosure is to provide a telescopic mechanism-type partial-section shaft cutting mechanism and a cutting process thereof, which can solve at least part of the above-mentioned technical problems.

[0004] A first aspect of the disclosed embodiment provides a telescopic mechanism-type partial cross-section shaft cutting mechanism, the cutting mechanism comprising:

[0005] Rotating mechanism;

[0006] The telescopic mechanism comprises a circular outer cylinder, a telescopic member adapted to the circular outer cylinder and a telescopic oil cylinder, wherein the circular outer cylinder is hinged to the rotary mechanism, the telescopic member and the circular outer cylinder are slidably connected, and the telescopic oil cylinder is mounted on the circular outer cylinder and connected to the telescopic member;

[0007] A cutting head, mounted on an end of the telescopic member away from the telescopic mechanism;

[0008] A swing cylinder, one end of which is hinged to the rotary mechanism, and the other end of which is hinged to the circular outer cylinder;

[0009] The limiting structure is arranged on the circular outer cylinder and the telescopic member, and is used for limiting the rotation of the telescopic member around its own axis.

[0010] Optionally, the limiting structure includes a limiting groove and a limiting member, one of the limiting groove and the limiting member is arranged on the circular outer cylinder, and the other of the limiting groove and the limiting member is arranged on the telescopic member, and the limiting groove extends along the axial direction of the telescopic member and slidably cooperates with the limiting member.

[0011] Optionally, the limiting structure includes a plurality of groups of limiting grooves and limiting members, and the plurality of groups of limiting grooves and limiting members are distributed circumferentially around the axial direction of the telescopic member.

[0012] Optionally, the cutting mechanism also includes a mounting groove arranged on the circular outer cylinder and a through hole arranged at the bottom of the mounting groove, the limiting member is fixedly installed in the mounting groove by a fastener, and a part of the limiting member passes through the through hole and cooperates with the limiting groove on the telescopic member.

[0013] Optionally, the limiting member is arranged away from the rotating mechanism, and the limiting member abuts against the bottom wall of the limiting groove.

[0014] Optionally, the cutting mechanism further comprises a first sliding sleeve, which is mounted on an end of the telescopic member away from the rotary mechanism and is slidably engaged with an inner side wall of the circular outer cylinder.

[0015] Optionally, the cutting mechanism further includes a second sliding sleeve, which is mounted on the inner wall of the circular outer cylinder and is close to the rotating mechanism.

[0016] Optionally, the slewing mechanism includes a slewing seat, a slewing motor mounted on the slewing seat, and a first connecting seat and a second connecting seat fixedly connected to the output shaft of the slewing motor; the first connecting seat is hinged to the telescopic mechanism, the second connecting seat is hinged to the swing cylinder, and the slewing motor drives the first connecting seat and the second connecting seat to rotate around its output shaft.

[0017] A second aspect of the disclosed embodiment provides a cutting process of a telescopic mechanism-type partial-section vertical shaft cutting mechanism, wherein the cutting process adopts the cutting mechanism as described above.

[0018] Optionally, the cutting mechanism realizes the movement of the cutting head in the axial direction of the shaft through a telescopic mechanism, realizes the cutting of the cutting head in the axial direction of the shaft through a swing cylinder, and realizes the cutting of the cutting head in the circumferential direction of the shaft through a rotary motor, wherein a slag chute is also provided below the shaft, and the rock cuttings cut off from the shaft slide down into the slag chute along the cutting trajectory and are transported out at the bottom of the slag chute by a belt conveyor or an engineering vehicle, thereby realizing the synchronous matching of efficient rock breaking and slag discharge.

[0019] The main technical effects achieved by the embodiments of the present disclosure are as follows: the embodiments of the present disclosure use a circular telescopic cylinder structure as the telescopic mechanism. Compared with the rectangular telescopic cylinder structure, which has poor single-sided force resistance during cutting, the circular telescopic cylinder structure has strong torque resistance because it can withstand overall force during cutting. At the same time, a limit cut is set to prevent the relative circumferential rotation between the circular outer cylinder and the telescopic part, thereby improving the stability and reliability of the telescopic cutting when a large torque is generated when the extreme telescopic amount is reached. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram (front view) of a circular telescopic cylinder type double longitudinal axis shaft cutting mechanism in an embodiment of the present disclosure;

[0021] Figure 2 It is a structural schematic diagram (side view) of a circular telescopic cylinder type double longitudinal axis shaft cutting mechanism in an embodiment of the present disclosure;

[0022] Figure 3 It is a schematic diagram of the installation structure of a circular telescopic cylinder type partial cross-section shaft cutting mechanism in the embodiment of the present disclosure (taking a single arm as an example);

[0023] Figure 4 It is a schematic diagram of a circular telescopic cylinder type partial cross-section shaft cutting mechanism in an embodiment of the present disclosure;

[0024] Figure 5-1 In the embodiments of the present disclosure Figure 4 AA cross-sectional view of ;

[0025] Figure 5-2 In the embodiments of the present disclosure Figure 5-1 A local enlarged schematic diagram of point B in FIG.

[0026] Figure 6 It is a schematic diagram of the upper and lower cutting process of a circular telescopic cylinder type partial cross-section vertical shaft cutting mechanism in an embodiment of the present disclosure;

[0027] Figure 7 It is a schematic diagram of a rotary cutting and undercutting process of a circular telescopic cylinder type partial cross-section shaft cutting mechanism in an embodiment of the present disclosure;

[0028] Figure 8 It is a schematic diagram (top view) of the rotary cutting process of a circular telescopic cylinder type partial cross-section vertical shaft cutting mechanism in an embodiment of the present disclosure.

[0029] Description of reference numerals: 1, slewing mechanism; 11, first connecting seat; 12, second connecting seat; 13, pin shaft; 2, swing oil cylinder; 3, telescopic oil cylinder; 4, telescopic mechanism; 41, telescopic member; 411, connecting plate; 412, inner cylinder; 413, first sliding sleeve; 414, screw; 42, circular outer cylinder; 421, outer cylinder; 422, stopper; 423, first bolt; 424, second sliding sleeve Moving shaft sleeve; 425, pin; 426, sealing seat; 427, guide belt; 428, dust ring; 429, O-ring; 4210, felt ring; 4211, sealing end cover; 4212, second bolt; 43, first ear seat; 44, air filter; 45, second ear seat; 5, longitudinal axis milling head; 51, hydraulic motor seat; 52, cutting head; 6, vertical shaft rock layer; 61, under-excavated rock; 7, slag chute. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The modes described in the following exemplary embodiments do not represent all modes consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0031] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limitation, but indicate that there is at least one, and if only "one" is referred to, it will be separately described. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] like Figure 1-6 As shown, the embodiment of the present disclosure provides a telescopic mechanism-type partial cross-section shaft cutting mechanism, which is composed of two longitudinal shaft cutting mechanisms (such as Figure 1 , 2 , 8), the connection points of the two longitudinal cutting mechanisms are offset from the center of the shaft, and the two are symmetrical at the center of mass (i.e. Figure 8 Of course, in other embodiments, the telescopic mechanism-type partial-section shaft cutting mechanism may also be composed of 1, 3 or more longitudinal axis shaft cutting mechanisms, and the embodiments of the present disclosure are not limited to this.

[0033] The cutting process is divided into two types: one is as follows Figure 6 The vertical shaft rock layer 6 is cut up and down as shown, and the second is as Figure 8 The rotary cutting shaft formation 6 is shown.

[0034] like Figure 3 As shown, the installation structure of the circular telescopic cylinder type partial section shaft cutting mechanism is composed of a rotary mechanism 1, a swing cylinder 2, a telescopic cylinder 3, a telescopic mechanism 4, and a longitudinal axis milling head 5.

[0035] The rotary mechanism 1 realizes the function of continuous rotation around the central axis of the shaft by means of hydraulic pressure or motor, and includes a first connecting seat 11, a second connecting seat 12, and a pin 13 installed on the rotary seat. The tail of the circular telescopic cylinder type partial section shaft cutting mechanism is connected and installed with the first connecting seat 11 through the pin 13, and the longitudinal axis milling head 5 is driven to realize the following by continuous rotation around the central axis of the shaft. Figure 7 , 8 Cutting undercut rock and rotary cutting are shown.

[0036] The two ends of the swing cylinder 2 are connected through the pin 13 and the second connecting seat 12 and the first ear seat 43 on the telescopic mechanism 4 to achieve the following Figure 6 The longitudinal axis milling head 5 is shown cutting up and down the trajectory.

[0037] The two ends of the telescopic cylinder 3 are also connected to the second ear seats 45 at the front and rear ends of the telescopic mechanism 4 through the pin 13 to achieve the following Figure 6 The cutting trajectories of the longitudinal milling head 5 at different depths are shown.

[0038] like Figure 5-1 and Figure 5-2 As shown, the telescopic mechanism 4 is composed of a telescopic member 41, a circular outer cylinder 42, a first ear seat 43, an air filter 44, and a second ear seat 45. The telescopic member 41 is welded by a connecting plate 411 and an inner cylinder 412, and a first sliding sleeve 413 is fastened to the tail of the inner cylinder 412 by a screw 414. The circular outer cylinder 42 is composed of an outer cylinder body 421, a limiting member 422, a first bolt 423, a second sliding sleeve 424, a pin 425, a sealing seat 426, a guide belt 427, a dust ring 428, an O-ring 429, a felt ring 4210, a sealing end cover 4211, and a second bolt 4212. The static pressure cylinder 46 is composed of a cylinder rod 461, a cylinder barrel 462, a seal 463, and an oil inlet and return interface 464. The limiting structure distributed around the outer cylinder body 421 is composed of a limiting member 422, a first bolt 423 and a limiting groove. The sliding sealing device at the front end of the outer cylinder body 421 is composed of a second sliding sleeve 424, a pin 425, a sealing seat 426, a guide belt 427, a dust ring 428, an O-ring 429, a felt ring 4210, a sealing end cover 4211, and a second bolt 4212.

[0039] It should be noted that, in other embodiments, the telescopic member 41 may also be an axial structure, and the present disclosure is not limited to this.

[0040] The longitudinal axis milling head 5 is composed of a hydraulic motor seat 51 and a cutting head 52. The cutting head 52 can be a longitudinal axis cutting head or a transverse axis cutting head, which is not limited in the present disclosure.

[0041] The disclosed embodiment uses a circular telescopic cylinder structure as the telescopic mechanism 4. Compared with the rectangular telescopic cylinder structure, which has poor single-sided force resistance during cutting, the circular telescopic cylinder structure has strong torque resistance because it can withstand overall force during cutting. At the same time, a limit cut is set to prevent the relative circumferential rotation between the circular outer cylinder 42 and the telescopic member 41, thereby improving the stability and reliability of the telescopic cutting when a large torque is generated when the extreme telescopic amount is reached.

[0042] In the embodiment of the present disclosure, a circular telescopic cylinder type partial cross-section shaft cutting mechanism is provided, wherein the connection points (first connecting seats 11) of the two longitudinal shaft cutting mechanisms are offset from the shaft center and are symmetrical with the center of mass. The first connecting seat 11 and the second connecting seat 12 are both installed in pairs below the slewing mechanism 1 (such as Figure 3 , 8 The swing cylinder 2 is located at the left and right sides of the telescopic mechanism 4, and the telescopic cylinder 3 is located at the upper and lower sides of the telescopic mechanism 4.

[0043] The telescopic mechanism 4 is to install the inner cylinder 412 in the telescopic part 41 inside the outer cylinder 421 in the circular outer cylinder 42, and the two realize axial forward and backward telescopic movement through two telescopic cylinders 3. The second ear seat 45 is respectively at the rear end of the connecting plate 411 of the telescopic part 41 and the tail end of the outer cylinder 421 of the circular outer cylinder 42.

[0044] The front end of the telescopic member 41 is a connecting plate 411, and the rear end is welded with an inner cylinder 412. The first sliding sleeve 413 at the rear end of the inner cylinder 412 is fixed by a screw 414. The first sliding sleeve 413 is made of a multi-layer composite material combined with a surface polymer, and has high-quality properties such as low friction coefficient, high wear resistance, and self-lubrication. It plays an important stabilizing role when reciprocating and cutting. The connecting plate 411 at the front end of the telescopic member 41 and the hydraulic motor seat 51 of the horizontal axis milling head are fixed by stop fitting and bolt connection. The cutting head 52 is installed at the front end of the hydraulic motor seat 51 and fixed by radial and axial screws of the pin shaft.

[0045] The second sliding sleeve 424 is fixed to the innermost side of the front end of the outer cylinder 421 by a pin 425. The front end face of the outer cylinder 421 is a sealing end cover 4211 fixed by a second bolt 4212. The sealing seat 426 is fixed in the middle position between the sealing end cover 4211 and the second sliding sleeve 424. The guide belt 427 and the dust ring 428 installed in the bottom groove of the sealing seat 426 and the outer wall of the inner cylinder 412 play a guiding and dustproof role. The joint surface of the sealing seat 426 and the sealing end cover 4211 is provided with an O-ring 429 to play a sealing role. The felt ring 4210 installed in the bottom groove of the sealing end cover 4211 increases the dustproof performance of the telescopic mechanism 4.

[0046] The air filter 44 is installed at the rear of the outer cylinder 421, and together with the dustproof sealing device at the front end of the outer cylinder 421, a relatively clean space is formed inside the telescopic mechanism 4 to prevent dust from entering and polluting the internal environment.

[0047] The first bolts 423 are used to fix the stopper 422 in the four mounting grooves around the outer wall of the outer cylinder 421. The mounting grooves are provided with through holes at the bottom thereof for the stopper 422 to pass through. Specifically, the bottom of the stopper 422 contacts the two side walls of the stopper groove on the outer wall of the inner cylinder 412 through the through holes. In this way, the stopper structure not only serves as a guide rail for the axial sliding of the telescopic member 41, but also avoids the relative rotation between the telescopic member 41 and the circular outer cylinder 42 in the circumferential direction. It should be noted that in other embodiments, the stopper 422 can be located on the telescopic member 41, and the stopper groove can be located on the inner side wall of the circular outer cylinder 42, and the present disclosure does not limit this.

[0048] Considering that after the telescopic member 41 moves downward for a long distance, the overlapped portion between the telescopic member 41 and the circular outer cylinder 42 becomes smaller, and the cutting head 52 located at the lower end of the telescopic member 41 will generate a large torque when performing a cutting operation, and the overlapped portion between the telescopic member 41 and the circular outer cylinder 42 is the main force-bearing area of ​​the torque, therefore, as an optional embodiment, the limiting member 422 is arranged away from the rotary mechanism 1, and the limiting member 422 abuts against the bottom wall of the limiting groove. Such an arrangement improves the torsion resistance of the cutting mechanism.

[0049] In addition, the first ear seat 43 is installed on the left and right sides of the outer cylinder 421, mainly to cooperate with the installation of the swing cylinder 2 to realize the up and down cutting process of the vertical shaft cutting mechanism.

[0050] The circular telescopic cylinder type double longitudinal axis shaft cutting mechanism can drive the shaft cutting mechanism to perform 360° reciprocating rotation by connecting the rotary mechanism 1. Figure 6 The longitudinal milling head 5 shown cuts up and down. Figure 8 The longitudinal milling head 5 shown has different diameters of rotary cutting. Both cutting processes can be operated through intelligent control to improve cutting efficiency and reduce the labor intensity of operators.

[0051] The two cutting processes are as follows:

[0052] 1. As Figure 6 The vertical shaft strata are shown cut up and down.

[0053] like Figure 6As shown, the vertical shaft cutting mechanism realizes up and down cutting through the swing cylinder 2, that is, cutting from the inner wall of the vertical shaft (slag chute 7) to the outer wall, and the telescopic mechanism 4 is pushed by the telescopic cylinder 3 to achieve multiple extensions, and the longitudinal axis milling head 5 is used to perform multi-layer cutting, and the rock cuttings cut from the vertical shaft rock layer 6 slide down along the cutting trajectory into the slag chute 7, and are transported out at the bottom of the slag chute 7 by a belt conveyor or an engineering vehicle, realizing the synchronous matching of efficient rock breaking and slag discharge. Figure 7 As shown, the shaft cutting mechanism is driven by the rotary mechanism 1 to rotate and cut one circle in sequence. It should be noted that after the cutting head 52 cuts the shaft rock layer 6 up and down, there will be undercut rocks 61, and it is necessary to rotate one circle again to cut the undercut rocks 61 in sequence. After the cycle is completed, the rotary mechanism 1 drives the shaft cutting mechanism to sink to a certain depth, and then a new round of cutting is carried out.

[0054] 2. If Figure 8 The rotary cutting shaft rock formation is shown.

[0055] The rotary mechanism 1 performs 180° reciprocating cycle rotation, i.e., cutting from the inner wall of the shaft (slag chute 7) to the outer wall, and the telescopic mechanism 4 is pushed by the telescopic cylinder 3 to achieve multiple extensions, and the longitudinal axis milling head 5 performs multiple layers and multiple circles of cutting in sequence, and the rock debris cut from the shaft rock layer 6 slides sideways along the cutting trajectory into the slag chute 7. When all the rock layers are cut, the rotary mechanism 1 drives the shaft cutting mechanism to sink to a certain depth, and then a new round of cutting is carried out.

[0056] The cutting head 52 is driven by the hydraulic motor base 51 to rotate and cut by hydraulic pressure.

[0057] The telescopic mechanism 4 pushes the telescopic member 41 to reciprocate and telescope along the axial direction of the limit member 422 of the circular outer tube 42 through the telescopic oil cylinder 3, and the limit member 422 connected by bolts is also easy to replace, which not only has a guiding function but also an anti-torsion function.

[0058] The outer cylinder 421 is provided with a dust ring 428, a felt ring 4210 and an air filter 44 at the end of the outer cylinder 421 to reduce the entry of rock dust during the telescopic process. The first sliding sleeve 413 at the end of the inner cylinder 412 and the second sliding sleeve 424 and the guide belt 427 at the front end of the outer cylinder 421 provide higher reliability for the friction and force during the telescopic process.

[0059] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A telescopic mechanism type partial section shaft cutting mechanism, characterized in that: The cutting mechanism comprises: Rotating mechanism; The telescopic mechanism comprises a circular outer cylinder, a telescopic member adapted to the circular outer cylinder and a telescopic oil cylinder, wherein the circular outer cylinder is hinged to the rotary mechanism, the telescopic member and the circular outer cylinder are slidably connected, and the telescopic oil cylinder is mounted on the circular outer cylinder and connected to the telescopic member; A cutting head, mounted on an end of the telescopic member away from the telescopic mechanism; A swing cylinder, one end of which is hinged to the rotary mechanism, and the other end of which is hinged to the circular outer cylinder; The limiting structure is arranged on the circular outer cylinder and the telescopic member, and is used for limiting the rotation of the telescopic member around its own axis.

2. A telescopic mechanism type partial section shaft cutting mechanism according to claim 1, characterized in that: The limiting structure includes a limiting groove and a limiting member, one of which is arranged on the circular outer cylinder, and the other of which is arranged on the telescopic member, and the limiting groove extends along the axial direction of the telescopic member and slidably cooperates with the limiting member.

3. A telescopic partial section shaft cutting mechanism according to claim 1, characterized in that: The limiting structure comprises a plurality of groups of limiting grooves and limiting members, and the plurality of groups of limiting grooves and limiting members are distributed circumferentially around the axial direction of the telescopic member.

4. A telescopic partial section shaft cutting mechanism according to claim 1, characterized in that: The cutting mechanism also includes a mounting groove arranged on the circular outer cylinder and a through hole arranged at the bottom of the mounting groove. The limiting member is fixedly installed in the mounting groove by a fastener, and part of the limiting member passes through the through hole and cooperates with the limiting groove on the telescopic member.

5. A telescopic mechanism type partial section shaft cutting mechanism according to claim 4, characterized in that: The limiting member is arranged away from the rotating mechanism, and the limiting member abuts against the bottom wall of the limiting groove.

6. A telescopic mechanism type partial section shaft cutting mechanism according to claim 1, characterized in that: The cutting mechanism further comprises a first sliding sleeve, which is mounted on an end of the telescopic member away from the rotary mechanism and is slidably matched with the inner side wall of the circular outer cylinder.

7. A telescopic partial section shaft cutting mechanism according to any one of claims 1, characterized in that: The cutting mechanism further comprises a second sliding sleeve, which is mounted on the inner side wall of the circular outer cylinder and is close to the rotating mechanism.

8. A telescopic mechanism type partial cross-section shaft cutting mechanism according to claim 1, characterized in that: The slewing mechanism includes a slewing seat, a slewing motor installed on the slewing seat, and a first connecting seat and a second connecting seat fixedly connected to the output shaft of the slewing motor. The first connecting seat is hinged to the telescopic mechanism, and the second connecting seat is hinged to the swing cylinder. The slewing motor drives the first connecting seat and the second connecting seat to rotate around its output shaft.

9. A cutting process of a telescopic mechanism type partial section shaft cutting mechanism, characterized in that: The cutting process adopts the cutting mechanism as described in any one of claims 1-8.

10. The cutting process of the telescopic mechanism type partial section shaft cutting mechanism according to claim 9, characterized in that: The cutting mechanism realizes the movement of the cutting head in the axial direction of the shaft through a telescopic mechanism, the cutting head in the axial direction of the shaft through a swing cylinder, and the cutting head in the circumferential direction of the shaft through a rotary motor. A slag chute is also provided below the shaft. The rock cuttings cut from the shaft slide down into the slag chute along the cutting trajectory and are transported out at the bottom of the slag chute by a belt conveyor or an engineering vehicle, thereby realizing the synchronous matching of efficient rock breaking and slag discharge.

Images