A cutting chain for a mining chain saw

Abstract

The present invention provides a cutting chain for a mining chain arm saw, comprising a plurality of groups of circulating links; each group of circulating links comprises a chain plate component, a single blade component and a double blade component; the single blade component comprises a plurality of single blade units sequentially arranged along the length direction of the chain plate component; the double blade component comprises a plurality of double blade units sequentially arranged along the length direction of the chain plate component, with the first double blade unit being arranged adjacent to the last single blade unit in the single blade component; the cutting surfaces of the cutter heads in each single blade unit and each double blade unit are inclined at the same acute angle relative to the length direction of the chain plate component, and the highest cutting point of the cutting surface of each cutter head decreases in sequence in the order of arrangement along the length direction of the chain plate component. In the present invention, the cutting range formed by the combination of each cutter head gradually increases in cutting width; and decreases in cutting height, which can improve the work efficiency and slag removal capacity of the cutter head during cutting, and can also prevent the cutter head from being subjected to concentrated loads during cutting.

Description

Technical Field

[0001] The present invention relates to the technical field of chain arm saws, and in particular to a cutting chain of a mining chain arm saw. Background Art

[0002] With the continuous improvement of stone mining technology and the increasing demand for stone, chain saws are widely used in stone mining due to their smooth cutting surface, continuous cutting capability, and high cutting efficiency. Specifically, chain saws are widely used for horizontal or vertical cutting of marble or sandstone with a hardness of less than 5.

[0003] Conventional chain saws generally consist of a machine body, a chain arm fixed to the body, a chain wound around the chain arm, and chain cutters mounted on the outer circumference of the chain. The multiple chain cutters arranged on the chain are often arranged in an unreasonable manner and lack structural diversity, which makes the chain cutters easily wear during use, thus shortening their service life.

[0004] In addition, in terms of coal resource mining, when cutting coal seams, the mining chain arm cutter has structural defects, such as the presence of heat dissipation holes on the outer chain plates of the chain and the lack of diversion slopes on the chain knife seats. Coal slag is easily accumulated in the chain, causing problems such as knife jamming, friction overheating and chain breakage, which seriously affect the efficiency of coal mine construction. Summary of the Invention

[0005] The present invention aims to provide a cutting chain for a mining chain saw. By optimizing the chain structure, it aims to address the problem of chain blades being easily worn during use, which reduces their service life. It also addresses the problems of chain blade jamming, frictional overheating, and chain breakage caused by slag accumulation within the chain due to heat dissipation holes on the outer chain plates. The specific technical solution is as follows:

[0006] A cutting chain for a mining chain arm saw, comprising a plurality of groups of circulating links, wherein the groups of circulating links are sequentially connected end to end to form a closed-loop cutting chain;

[0007] Each set of circulation links includes a chain plate component and a single-blade component and a double-blade component arranged on the chain plate component;

[0008] The single-pole component includes a first single-pole unit, a second single-pole unit... to an Nth single-pole unit, which are sequentially arranged along the length direction of the chain plate component, wherein N is an odd number not less than 3; a single blade head is provided on each single-pole unit, the blade head center of the first single-pole unit is coplanar with the central axis in the length direction of the chain plate component, and the blade head centers of each even-numbered single-pole unit after the first single-pole unit are sequentially deviated from the same side of the central axis in the length direction of the chain plate component, and the deviation distance increases sequentially with the arrangement order of the even-numbered single-pole units; the blade head centers of each odd-numbered single-pole unit after the first single-pole unit are sequentially deviated from the other side of the central axis in the length direction of the chain plate component, and the deviation distance increases sequentially with the arrangement order of the odd-numbered single-pole units;

[0009] The double-blade component includes a first double-blade unit, a second double-blade unit, ... to an Mth double-blade unit, which are sequentially arranged along the length direction of the chain plate component, wherein M is a natural number not less than 3, and the first double-blade unit is arranged adjacent to the Nth single-blade unit in the single-blade component; two symmetrical cutting heads are arranged on each double-blade unit, and are offset and arranged on both sides of the central axis in the length direction of the chain plate component; the offset distance between the two cutting heads on each double-blade unit increases sequentially with the arrangement order of the double-blade units, and the minimum offset distance of the cutting heads in the double-blade unit is greater than the maximum offset distance of the cutting heads in the single-blade unit;

[0010] The cutting surfaces of the cutter heads in each single-blade unit and each double-blade unit are inclined at the same acute angle relative to the length direction of the chain plate component, and in the order of arrangement along the length direction of the chain plate component, the highest cutting points of the cutting surfaces of the cutter heads in each single-blade unit and each double-blade unit decrease successively.

[0011] In some embodiments, each set of circulating sections further includes a scraper member, which is disposed on the end of the chain plate component and adjacent to the Mth double-blade unit in the double-blade member.

[0012] In some embodiments, the scraper component includes a scraper seat and a cutter head assembly, the cutter head assembly includes a rectangular cutter head arranged on the scraper seat and ear-shaped cutter heads arranged on both sides of the rectangular cutter head, the inclination angles of the cutting surfaces of the rectangular cutter head and the ear-shaped cutter head are the same as the inclination angles of the cutter heads of each double-blade unit in the double-blade component; the cutting center of the cutter head assembly is coplanar with the central axis in the length direction of the chain plate component, and the cutting range of the cutter head assembly is greater than the cutting width of the M-1 double-blade unit and smaller than the cutting width of the M double-blade unit in terms of cutting width, and greater than the cutting height of the M double-blade unit and smaller than the cutting height of the M-1 double-blade unit in terms of cutting height; a first groove body for clamping with the chain plate component is provided on the scraper seat, and a first locking hole for the locking member to pass through is provided on the first groove body.

[0013] In some embodiments, the rectangular cutter head includes a rectangular first cutter head and a rectangular second cutter head, which are symmetrically arranged on the scraper seat; the ear-shaped cutter head includes an ear-shaped first cutter head and an ear-shaped second cutter head, which are symmetrically arranged on both sides of the rectangular cutter head; a first buffer slope is arranged between the rectangular cutter head and the first trough body; a first diversion slope is arranged between the rectangular first cutter head and the first buffer slope; and a second diversion slope is arranged between the rectangular second cutter head and the first buffer slope.

[0014] In some embodiments, each single-blade unit includes a single-blade seat for accommodating a blade head; the single-blade seat is provided with a second groove for engaging with the chain plate component, and the second groove is provided with a second locking hole for a locking member to pass through; a second buffer slope is provided between the single-blade head and the second groove in each single-blade unit;

[0015] Each double-blade unit includes a double-blade holder for setting a blade head, a third groove body for clamping with the chain plate component is provided on the double-blade holder, and a third locking hole for a locking member to pass through is provided on the third groove body; a third buffer slope body is provided between the double blade head and the third groove body in each double-blade unit; a third diversion slope body is provided between the double blade heads in each double-blade unit.

[0016] In some embodiments, the chain plate component includes multiple inner chain plates and multiple outer chain plates, and a connecting groove for clamping with the inner chain plate is provided at the bottom of each outer chain plate; the two ends of the inner chain plate are respectively clamped in the connecting grooves of the two adjacent outer chain plates, and a first connecting hole for connecting the two outer chain plates with a connecting piece is provided on both ends of the inner chain plate; a second connecting hole adapted to the first connecting hole is provided on the outer chain plate, and a fixing groove perpendicular to the central axis of the second connecting hole is also provided on the outer chain plate, and the fixing groove is arranged on the outer wall surface of the outer chain plate.

[0017] In some embodiments, the depth direction of the fixing groove is -15° to 15° with respect to the length direction of the outer link plate.

[0018] In some embodiments, the inner link plate is a waist-shaped structure; and the corners at both ends of the connecting groove of the outer link plate are continuous rounded and chamfered structures.

[0019] In some embodiments, the number of outer link plates in the chain plate component is equal to the sum of the number of single blade holders, double blade holders, and scraper holders, and the single blade holders, double blade holders, and scraper holders are all connected to the corresponding outer link plates in the length direction of the chain plate component;

[0020] A sliding platform is provided on each of the outer chain plates corresponding to the second trough body on the single knife seat, the third trough body on the double knife seat and the first trough body on the scraper seat, and an adaptive fastening hole is provided on each sliding platform corresponding to the second locking hole on the second trough body, the third locking hole on the third trough body and the first locking hole on the first trough body, and a limit block corresponding to the second trough body, the third trough body and the first trough body is provided on the end of each sliding platform.

[0021] In some embodiments, the connecting member includes a connecting pin for inserting into the first connecting hole and the second connecting hole and a fixing pin for passing through the connecting pin and being embedded in the fixing groove;

[0022] The cutter heads in each single-pole unit and each double-pole unit are all round cutter heads.

[0023] The application of the technical solution of the present invention has at least the following beneficial effects:

[0024] (1) The cutting chain of the mining chain arm saw described in the present invention, by setting the deviation distance of each cutter head in the single-blade component and the double-blade component in each group of circulation sections and the setting of the inclination angle of the cutting surface of each cutter head, makes the cutting range of each cutter head combination gradually increase in the cutting width direction; in the cutting height direction, the highest cutting point (i.e., the highest cutting point) of the cutting surface of the cutter head from the first single-blade unit to the sixth double-blade unit is successively lowered relative to the plane where the length direction of the chain plate component is located, and the cutting depth gradually decreases. This gradual arrangement of cutter heads not only improves the work efficiency and slag removal capacity of the cutter heads during cutting, but also avoids the cutter heads from being subjected to concentrated loads during cutting, prevents brittle fracture of the chain plate components, and extends the service life.

[0025] (2) The blade head assembly in the scraper component of the present invention adopts a rectangular blade head and an ear-shaped blade head, which not only has a wider cutting range than a circular blade head, but also the cutting range of the blade head assembly and its special position at the end of the circulation segment can effectively make up for the shortcomings of insufficient cutting and low slag discharge efficiency of the circular blade head on the single blade holder and the double blade holder, greatly improving the slag discharge capacity of the chain and solving the problems of easy jamming and low cutting efficiency during chain cutting.

[0026] (3) In the present invention, only two second connection holes and fixing grooves are provided on the outer link plate, and the heat dissipation holes are eliminated, which can prevent gravel, coal rock, etc. from entering the chain plate through the heat dissipation holes and causing blockage, thereby increasing the tensile stress between the outer link plates and affecting the service life of the outer link plates.

[0027] (4) The first, second, and third buffer slopes provided in the present invention can avoid direct rigid impact between the cutter head and coal, rock, stone, etc. during cutting, thereby reducing wear on the single cutter holder, double cutter holder, scraper holder, and cutter head. The first, second, and third diverter slopes provided in the present invention can effectively ensure smooth slag discharge, improve slag discharge capacity, disperse the resistance of coal, rock, gravel, etc. on each cutter holder, and extend the service life of each cutter holder.

[0028] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is a schematic structural diagram of a group of loop links in a cutting chain of a mining chain saw in Example 1 of the present invention;

[0031] Figure 2 yes Figure 1 Schematic diagram of the arrangement of the cutter heads in a set of cycle sections in the cutting height direction and the cutting width direction;

[0032] Figure 3 yes Figure 1 A schematic diagram of the arrangement of the single blade holder, double blade holder and scraper holder in a set of circulation sections;

[0033] Figure 4 yes Figure 1 A schematic diagram of the structure of the scraper seat in a set of circulation sections;

[0034] Figure 5 yes Figure 1 A schematic diagram of the structure of any double knife holder in a set of circulation sections;

[0035] Figure 6 yes Figure 1 A schematic diagram of the structure of any single-pole holder in a set of loop sections;

[0036] Figure 7 yes Figure 1 A partial exploded view of the chain plate components in a set of circulation links;

[0037] Among them, 1. First single-pole unit, 2. Second single-pole unit, 3. Third single-pole unit, 4. Fourth single-pole unit, 5. Fifth single-pole unit, 6. Sixth single-pole unit, 7. Seventh single-pole unit, 8. Eighth single-pole unit, 9. Ninth single-pole unit, 10. First double-pole unit, 11. Second double-pole unit, 12. Third double-pole unit, 13. Fourth double-pole unit, 14. Fifth double-pole unit, 15. Sixth double-pole unit, 16. Scraper seat, 16.1. First trough, 16.2. First buffer slope, 16.3 , first diverter slope, 16.4, second diverter slope, 17, single knife holder, 17.1, second trough, 17.2, second buffer slope, 18, double knife holder, 18.1, third trough, 18.2, third buffer slope, 18.3, third diverter slope, 19, inner chain plate, 20, outer chain plate, 20.1 connecting groove, 20.2, fixed groove, 20.3, sliding table, 20.4, connecting pin, 20.5, fixed pin, 20.6, limit block, A, round cutter head, B, rectangular cutter head, C, ear-shaped cutter head. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0039] Example 1:

[0040] See also Figure 1-7 A cutting chain for a mining chain arm saw comprises a plurality of circulating links, wherein the circulating links of each group are sequentially connected end to end to form a closed loop cutting chain;

[0041] See also Figure 1-3 , each set of circulation segments includes a chain plate component and a single-blade component and a double-blade component arranged on the chain plate component;

[0042] The single-pole component includes a first single-pole unit 1, a second single-pole unit 2, a third single-pole unit 3, a fourth single-pole unit 4, a fifth single-pole unit 5, a sixth single-pole unit 6, a seventh single-pole unit 7, an eighth single-pole unit 8 and a ninth single-pole unit 9, which are arranged in sequence along the length direction of the chain plate component, that is, N is 9; a single circular cutter head A is welded on each single-pole unit, the cutter head center of the first single-pole unit is coplanar with the central axis in the length direction of the chain plate component, the cutter head centers of each even-numbered single-pole unit after the first single-pole unit 1 are sequentially deviated from the same side of the central axis in the length direction of the chain plate component, and the deviation distance increases sequentially with the arrangement order of the even-numbered single-pole units; the cutter head centers of each odd-numbered single-pole unit after the first single-pole unit 1 are sequentially deviated from the other side of the central axis in the length direction of the chain plate component, and the deviation distance increases sequentially with the arrangement order of the odd-numbered single-pole units;

[0043] The double-blade component includes a first double-blade unit 10, a second double-blade unit 11, a third double-blade unit 12, a fourth double-blade unit 13, a fifth double-blade unit 14 and a sixth double-blade unit 15 which are sequentially arranged along the length direction of the chain plate component, that is, M is 6 (the values ​​of M and N in the present invention are determined by the total length of the chain to be cut), and the first double-blade unit 10 is adjacent to the ninth single-blade unit 9 in the single-blade component; two symmetrical circular cutter heads A are welded on each double-blade unit and are offset and arranged on both sides of the central axis in the length direction of the chain plate component; the offset distance between the two cutter heads on each double-blade unit increases sequentially with the arrangement order of the double-blade units, and the minimum offset distance of the cutter heads in the double-blade unit is greater than the maximum offset distance of the cutter heads in the single-blade unit;

[0044] The cutting surfaces of the cutter heads in each single-blade unit and each double-blade unit are inclined at the same acute angle relative to the length direction of the chain plate component, and in the order of arrangement along the length direction of the chain plate component, the highest cutting points of the cutting surfaces of the cutter heads in each single-blade unit and each double-blade unit decrease successively.

[0045] The cutter heads in each single-blade unit and each double-blade unit are all circular cutter heads. If the cutting point of the circular cutter head is damaged, it can be repaired, rotated and then brazed for use, thereby increasing the utilization rate of a circular cutter head and reducing the cost of use.

[0046] See also Figure 2The cutting range formed by the combination of the cutter heads in the single-blade and double-blade components gradually increases in width. In the cutting height direction, the highest cutting point (i.e., the highest cutting point) of the cutting surface from the cutter head of the first single-blade unit 1 to the cutter head of the sixth double-blade unit 15 decreases successively relative to the plane along the length of the chain plate component (specifically, along the length of the slide table 20.3), and the cutting depth gradually decreases. This gradual arrangement of cutter heads not only improves the efficiency and slag removal capabilities of the cutter heads during cutting, but also protects the cutter heads from concentrated loads during cutting, preventing brittle fracture of the chain plate components and extending their service life.

[0047] See also Figure 1-4 Each set of circulation sections also includes a scraper component, which is arranged on the end of the chain plate component and adjacent to the sixth double-blade unit 15 in the double-blade component. Adding a scraper component in each set of circulation sections greatly improves the cutting efficiency of the cutting chain.

[0048] See also Figure 4 , the scraper component includes a scraper seat 16 and a cutter head assembly, the cutter head assembly includes a rectangular cutter head B welded on the scraper seat and ear-shaped cutter heads C arranged on both sides of the rectangular cutter head B, the inclination angle of the cutting surfaces of the rectangular cutter head B and the ear-shaped cutter head C is the same as that of the first double-blade unit in the double-blade component; the cutting center of the cutter head assembly is coplanar with the central axis of the length direction of the chain plate component, and the cutting range of the cutter head assembly is greater than the cutting width of the 5th double-blade unit and smaller than the cutting width of the 6th double-blade unit in terms of cutting width, and greater than the cutting height of the 6th double-blade unit and smaller than the cutting height of the 5th double-blade unit in terms of cutting height; a first groove body 16.1 for clamping with the chain plate component is provided on the scraper seat 16, and a first locking hole for a locking member to pass through is provided on the first groove body 16.1, and the locking member is a bolt, which is used to be inserted into the first locking hole and the fastening hole on the corresponding sliding platform 20.3 to achieve locking between the scraper seat 16 and the chain plate component.

[0049] The single blade holder 17 and the cutter head, the double blade holder 18 and the cutter head, and the scraper holder 16 and the cutter head are all welded. Compared with the assembled structure in the prior art, the one-piece welded structure has higher connection strength and reduces unnecessary mounting holes on the blade holder.

[0050] The cutter head assembly in the scraper component adopts a rectangular cutter head B and an ear-shaped cutter head C, which not only has a wider cutting range than the circular cutter head, but also the cutting range of the cutter head assembly and its special position at the end of the circulation segment can effectively make up for the shortcomings of insufficient cutting and low slag discharge efficiency of the circular cutter heads on the single cutter seat 17 and the double cutter seat 18, greatly improving the slag discharge capacity of the chain and solving the problems of easy jamming and low cutting efficiency during chain cutting.

[0051] The rectangular cutter head B includes a rectangular first cutter head and a rectangular second cutter head, which are symmetrically arranged on the scraper seat 16; the ear-shaped cutter head C includes an ear-shaped first cutter head and an ear-shaped second cutter head, which are symmetrically arranged on both sides of the rectangular cutter head B; a first buffer slope 16.2 is arranged between the rectangular cutter head B and the first trough body 16.1; a first diversion slope 16.3 is arranged between the rectangular first cutter head and the first buffer slope 16.2; and a second diversion slope 16.4 is arranged between the rectangular second cutter head and the first buffer slope 16.2.

[0052] See also Figure 6 Each single-pole unit includes a single-pole seat 17 for accommodating a cutter head; a second groove 17.1 for engaging with a chain plate component is provided on the single-pole seat 17; a second locking hole for a locking member to pass through is provided on the second groove 17.1; the locking member is a bolt, which is inserted into the second locking hole and the fastening hole on the corresponding slide table 20.3 to achieve locking between the single-pole seat 17 and the chain plate component; a second buffer slope 17.2 is provided between the single-pole head in each single-pole unit and the second groove 17.1;

[0053] See also Figure 5 Each double-knife unit includes a double-knife seat 18 for arranging a cutter head. A third groove 18.1 for clamping with the chain plate component is provided on the double-knife seat 18. A third locking hole for a locking member to pass through is provided on the third groove 18.1. The locking member is a bolt, which is inserted into the third locking hole and the fastening hole on the corresponding sliding platform 20.3 to achieve locking between the double-knife seat 18 and the chain plate component; a third buffer slope 18.2 is provided between the double knife head and the third groove 18.1 in each double-knife unit; and a third diverter slope 18.3 is provided between the double knife heads in each double-knife unit.

[0054] The first buffer slope 16.2, the second buffer slope 17.2 and the third buffer slope 18.2 can avoid direct rigid impact between the cutter head and coal, rock, stone, etc. during cutting, and reduce wear on the single cutter seat 17, the double cutter seat 18, the scraper seat and the cutter head.

[0055] The first diversion slope 16.3, the second diversion slope 16.4 and the third diversion slope 18.3 can effectively ensure smooth slag discharge, improve slag discharge capacity, disperse the resistance of coal, rock, gravel, etc. to each cutter seat, and extend the service life of each cutter seat.

[0056] See also Figure 7The chain plate assembly includes multiple inner link plates 19 and multiple outer link plates 20. Each outer link plate 20 has a connecting groove 20.1 at its bottom for engaging with the inner link plate 19. The ends of the inner link plates 19 are respectively engaged in the connecting grooves 20.1 of the adjacent outer link plates 20. First connecting holes are provided at each end of the inner link plates 19 for connecting the two outer link plates 20 with a connector. The outer link plates 20 are provided with second connecting holes that mate with the first connecting holes. They are also provided with fixing grooves 20.2 perpendicular to the central axis of the second connecting holes. These fixing grooves 20.2 are located on the outer wall of the outer link plates 20. Each outer link plate 20 has two fixing grooves 20.2, which are symmetrically arranged for ease of processing.

[0057] The depth direction of the fixing groove 20.2 is 15 degrees to the length direction of the outer link plate 20, which facilitates the disassembly and fixation of the connecting piece.

[0058] The inner link plate 19 is a waist-shaped structure; the corners at both ends of the connecting groove 20.1 of the outer link plate 20 are continuous rounded and chamfered structures, which facilitates large-angle relative rotation between adjacent outer link plates 20.

[0059] The number of outer chain plates 20 in the chain plate component is equal to the sum of the number of single blade holders 17, double blade holders 18 and scraper holders, and the single blade holders 17, double blade holders 18 and scraper holders are all connected to the corresponding outer chain plates 20 in the length direction of the chain plate component;

[0060] See also Figure 7 On each of the outer link plates 20, a sliding platform 20.3 is provided corresponding to the second trough 17.1 on the single knife seat 17, the third trough 18.1 on the double knife seat 18 and the first trough 16.1 on the scraper seat 16. Matching fastening holes are provided on each sliding platform 20.3 corresponding to the second locking hole on the second trough 17.1, the third locking hole on the third trough 18.1 and the first locking hole on the first trough. At the end of each sliding platform 20.3, a limit block 20.6 corresponding to the second trough 17.1, the third trough 18.1 and the first trough 16.1 is provided to ensure the stable connection between the outer link plate 20 and the single knife seat 17, the double knife seat 18 and the scraper seat 16, thereby ensuring safety during operation. In addition, the setting of the limit block can not only effectively prevent the single blade holder 17, the double blade holder 18 and the scraper holder from falling off the outer chain plate 20, but also provide a support point for the cutter head to withstand the huge planing force during operation.

[0061] The connecting member includes a connecting pin 20.4 for inserting into the first connecting hole and the second connecting hole and a fixing pin 20.5 for passing through the connecting pin 20.4 and embedding into the fixing groove 20.2. The fixing pin 20.5 effectively prevents axial movement of the connecting pin 20.4, thereby realizing a stable connection between the outer link plate 20 and the inner link plate 19.

[0062] The outer link plate 20, single blade holder 17, double blade holder 18, scraper holder and connecting pin 20.4 are all integrally quenched to a surface hardness of HRC42-45, thereby improving material strength. The surface of the fixing pin 20.5 is galvanized to prevent rust.

[0063] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A cutting chain for a mining chain saw, characterized in that: It includes multiple groups of circulation links, each group of circulation links is connected end to end in sequence to form a closed loop cutting chain; Each set of circulation links includes a chain plate component and a single-blade component and a double-blade component arranged on the chain plate component; The single-pole component comprises a first single-pole unit (1), a second single-pole unit (2) ... to an Nth single-pole unit arranged in sequence along the length direction of the chain plate component, wherein N is an odd number not less than 3; a single blade head is arranged on each single-pole unit, the blade head center of the first single-pole unit (1) is arranged coplanar with the central axis of the chain plate component in the length direction, the blade head centers of each even-numbered single-pole unit after the first single-pole unit (1) are sequentially deviated from the same side of the central axis in the length direction of the chain plate component, and the deviation distance increases sequentially with the arrangement sequence of the even-numbered single-pole units; the blade head centers of each odd-numbered single-pole unit after the first single-pole unit (1) are sequentially deviated from the other side of the central axis in the length direction of the chain plate component, and the deviation distance increases sequentially with the arrangement sequence of the odd-numbered single-pole units; The double-blade component comprises a first double-blade unit (10), a second double-blade unit (11) ... to an M-th double-blade unit sequentially arranged along the length direction of the chain plate component, wherein M is a natural number not less than 3, and the first double-blade unit (10) is arranged adjacent to the N-th single-blade unit in the single-blade component; two symmetrical blades are arranged on each double-blade unit, and are offset and arranged on both sides of the central axis in the length direction of the chain plate component; the offset distance between the two blades on each double-blade unit increases in sequence with the arrangement order of the double-blade units, and the minimum offset distance of the blades in the double-blade unit is greater than the maximum offset distance of the blades in the single-blade unit; The cutting surfaces of the cutter heads in each single-blade unit and each double-blade unit are inclined at the same acute angle relative to the length direction of the chain plate component, and in the order of arrangement along the length direction of the chain plate component, the highest cutting points of the cutting surfaces of the cutter heads in each single-blade unit and each double-blade unit decrease successively.

2. The cutting chain of the mining chain saw according to claim 1, characterized in that: Each group of circulation links further includes a scraper component, which is arranged on the end of the chain plate component and adjacent to the Mth double-blade unit in the double-blade component.

3. The cutting chain of the mining chain saw according to claim 2, characterized in that: The scraper component includes a scraper seat (16) and a cutter head assembly, the cutter head assembly includes a rectangular cutter head arranged on the scraper seat (16) and ear-shaped cutter heads arranged on both sides of the rectangular cutter head, the inclination angles of the cutting surfaces of the rectangular cutter head and the ear-shaped cutter head are the same as the inclination angles of the cutter heads of each double-blade unit in the double-blade component; the cutting center of the cutter head assembly is coplanar with the central axis of the length direction of the chain plate component, and the cutting range of the cutter head assembly is greater than the cutting width of the M-1 double-blade unit and smaller than the cutting width of the M-1 double-blade unit in terms of cutting width, and greater than the cutting height of the M-1 double-blade unit and smaller than the cutting height of the M-1 double-blade unit in terms of cutting height; a first groove body (16.1) for clamping with the chain plate component is provided on the scraper seat (16), and a first locking hole for a locking member to pass through is provided on the first groove body (16.1).

4. The cutting chain of the mining chain saw according to claim 3, characterized in that: The rectangular cutter head comprises a rectangular first cutter head and a rectangular second cutter head, which are symmetrically arranged on the scraper seat (16); the ear-shaped cutter head comprises an ear-shaped first cutter head and an ear-shaped second cutter head, which are symmetrically arranged on both sides of the rectangular cutter head; a first buffer slope (16.2) is arranged between the rectangular cutter head and the first trough body (16.1); a first diversion slope (16.3) is arranged between the rectangular first cutter head and the first buffer slope (16.2); and a second diversion slope (16.4) is arranged between the rectangular second cutter head and the first buffer slope (16.2).

5. The cutting chain of the mining chain saw according to claim 4, characterized in that: Each single-blade unit includes a single-blade seat (17) for arranging a blade head; a second slot (17.1) for engaging with a chain plate component is provided on the single-blade seat (17); a second locking hole for a locking member to pass through is provided on the second slot (17.1); a second buffer slope (17.2) is provided between the single-blade head and the second slot (17.1) in each single-blade unit; Each double-blade unit includes a double-blade seat (18) for arranging a blade head, a third groove (18.1) for clamping with a chain plate component is provided on the double-blade seat (18), and a third locking hole for a locking member to pass through is provided on the third groove (18.1); a third buffer slope (18.2) is provided between the double blade head and the third groove (18.1) in each double-blade unit; and a third diversion slope (18.3) is provided between the double blade heads in each double-blade unit.

6. The cutting chain of the mining chain saw according to claim 5, characterized in that: The chain plate component comprises a plurality of inner chain plates (19) and a plurality of outer chain plates (20), and a connecting groove (20.1) for clamping with the inner chain plate (19) is provided at the bottom of each outer chain plate (20); the two ends of the inner chain plate (19) are respectively clamped in the connecting grooves (20.1) of the two adjacent outer chain plates (20), and a first connecting hole for connecting the two outer chain plates (20) is respectively provided on the two ends of the inner chain plate (19); a second connecting hole adapted to the first connecting hole is provided on the outer chain plate (20), and a fixing groove (20.2) perpendicular to the central axis of the second connecting hole is also provided on the outer chain plate (20), and the fixing groove (20.2) is arranged on the outer wall surface of the outer chain plate (20).

7. The cutting chain of the mining chain arm saw according to claim 6, characterized in that: The depth direction of the fixing groove (20.2) is -15° to 15° with respect to the length direction of the outer link plate (20).

8. The cutting chain of the mining chain saw according to claim 7, characterized in that: The inner link plate (19) is a waist-shaped structure; the corners at both ends of the connecting groove (20.1) of the outer link plate (20) are continuous rounded and chamfered structures.

9. The cutting chain of the mining chain saw according to claim 8, characterized in that: The number of outer chain plates (20) in the chain plate component is equal to the total number of the single knife seat (17), the double knife seat (18) and the scraper seat, and the single knife seat (17), the double knife seat (18) and the scraper seat (16) are all connected to the outer chain plates (20) corresponding to each other in the length direction of the chain plate component; A sliding platform (20.3) is provided on each of the outer link plates (20) corresponding to the second trough body (17.1) on the single blade seat (17), the third trough body (18.1) on the double blade seat (18), and the first trough body (16.1) on the scraper seat (16). Matching fastening holes are provided on each sliding platform (20.3) corresponding to the second locking hole on the second trough body (17.1), the third locking hole on the third trough body (18.1), and the first locking hole on the first trough body (16.1). A limiting block corresponding to the second trough body (17.1), the third trough body (18.1), and the first trough body (16.1) is provided on the end of each sliding platform (20.3).

10. The cutting chain of a mining chain saw according to any one of claims 6 to 9, characterized in that: The connecting piece comprises a connecting pin (20.4) for inserting into the first connecting hole and the second connecting hole, and a fixing pin (20.5) for passing through the connecting pin (20.4) and embedding into the fixing groove (20.2); The cutter heads in each single-pole unit and each double-pole unit are all round cutter heads.

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