CN216240623U - Three-hole spline-connected cutting device of inner-spraying longitudinal-shaft cantilever type heading machine - Google Patents
Three-hole spline-connected cutting device of inner-spraying longitudinal-shaft cantilever type heading machine Download PDFInfo
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- CN216240623U CN216240623U CN202122676477.XU CN202122676477U CN216240623U CN 216240623 U CN216240623 U CN 216240623U CN 202122676477 U CN202122676477 U CN 202122676477U CN 216240623 U CN216240623 U CN 216240623U
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Abstract
The utility model provides a three-hole spline-connected internal-spraying longitudinal-shaft cantilever type development machine cutting device, which belongs to the technical field of cantilever type development machine cutting mechanisms and comprises a cantilever section and a cutting head; the cutting head comprises a cutting head body, a tooth holder and cutting teeth; the cutting head body comprises a main head body and an inner spline sleeve; the main head body is cylindrical, truncated cone-shaped and hemispherical from the bottom to the top, tooth holders are welded outside the main head body in a mode of a plurality of spiral lines, a plurality of tooth holders are arranged on each spiral line, J-shaped grooves are formed in the bottoms of the tooth holders, and cutting teeth are arranged in the tooth holders; the inner spline sleeve is welded in the main head body, the central shaft is collinear with the central shaft of the main head body, 3 counter bores are arranged at the top of the inner spline sleeve, and the 3 counter bores are arranged in an equilateral triangle; the cutting head is connected with a cutting spindle at the front end of the cantilever section through three hexagon socket head cap screws. 3 hexagon socket head cap screw bolts are adopted to connect the cutting head and the cutting spindle, so that the probability that the cutting head is loosened or even falls off due to vibration and the cutting spindle is reduced.
Description
Technical Field
The utility model belongs to the technical field of cutting mechanisms of boom-type roadheader, and particularly discloses a three-hole spline-connected inner-spraying longitudinal-shaft boom-type roadheader cutting device.
Background
The connection mode of the longitudinal shaft cantilever type heading machine cutting head can be generally divided into flat key connection, spline connection, square hole connection and other connection modes, and different connection modes have respective advantages and disadvantages. Taking the splined connection cutterhead as an example, the vibrations that the single-hole type splined connection cutterhead produced at broken rock coal breakage in the past easily lead to the bolt not hard up to increase the probability that the cutterhead dropped, still have the inboard coal dust scheduling problem that easily advances of cutterhead simultaneously.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cutting device of a three-hole spline-connected inner spray longitudinal shaft cantilever type heading machine, which aims to solve the problems in the background technology.
In order to achieve the aim, the utility model provides a cutting device of a three-hole spline-connected inner spray longitudinal shaft cantilever type heading machine, which comprises a cantilever section and a cutting head; the cutting head comprises a cutting head body, a tooth holder and cutting teeth; the cutting head body comprises a main head body and an inner spline sleeve; the main head body is cylindrical, truncated cone-shaped and hemispherical from the bottom to the top, tooth holders are welded outside the main head body in a mode of a plurality of spiral lines, a plurality of tooth holders are arranged on each spiral line, J-shaped grooves are formed in the bottoms of the tooth holders, and cutting teeth are arranged in the tooth holders; the inner spline sleeve is welded in the main head body, the central shaft is collinear with the central shaft of the main head body, 3 counter bores are arranged at the top of the inner spline sleeve, and the 3 counter bores are arranged in an equilateral triangle; the cutting head is connected with a cutting spindle at the front end of the cantilever section through three hexagon socket head cap screws.
Furthermore, an annular boss welded with the inner spline sleeve is arranged on the inner wall of the main head body, two connecting plates I are welded on the side, facing the opening at the bottom of the main head body, of the annular boss, and the two connecting plates I are arranged along the diameter of the main head body; the front end of cantilever section is provided with connecting plate II, and connecting plate II is laminated with connecting plate I, and two connecting plates II are located the different sides of two connecting plates I respectively.
Furthermore, the main head body is provided with a marking hole, and the marking hole and the two connecting plates I are arranged in the same diameter.
Furthermore, an oil filling hole I is formed in the main head body, and a screw plug is installed in the oil filling hole I; an oil filling hole II is formed in the cantilever section and is concentrically arranged with the oil filling hole I.
Furthermore, a guide plate is welded outside the main head body, and the guide plate is welded to the preset tooth holder from bottom to top from the side face of the first tooth holder of each spiral line at the bottom of the main head body.
Furthermore, the closed space formed by welding the inner spline sleeve and the annular boss is a water cavity, a water hole communicated with the water cavity is formed in the main head body, and a linear nozzle and a combined gasket are installed in the water hole.
Furthermore, the cutting device of the three-hole spline-connected internal spray longitudinal shaft cantilever type heading machine also comprises a dustproof device, wherein the dustproof device comprises a circular connecting plate, two semi-rings and a dustproof ring; the annular connecting plate is welded on the inner side of the main head body and is vertical to the central shaft of the main head body; two semi-rings detachable install the side at the ring shape connecting plate towards main head body bottom opening, and the slot installation dust ring of semi-ring internal diameter department.
Further, the two half rings are installed on the circular ring-shaped connecting plate through bolts and washers.
Further, the dust ring is made of felt or packing.
The present invention has the following advantageous effects.
1. The cutting head is connected with the cutting spindle in the cantilever section by 3 hexagon socket head cap head screws, and compared with a mode of single-hole cylindrical head screw connection, the cutting head is effectively improved in connection reliability while avoiding easy abrasion due to leakage of a nut, and the probability that the cutting head is loosened or even drops due to vibration and the cutting spindle is reduced. Meanwhile, the principle that the stability of the equilateral triangle is optimal is adopted, and the equilateral triangle is different from the straight line connection formed by two hole bolts or the quadrilateral connection formed by four hole bolts, so that the equilateral triangle has better stability.
2. Through the dust keeper of detachable semi-ring, increased the convenience of dustproof materials such as replacement semi-ring ditch inslot felt or packing, improved the inner space dirt resistance that cutterhead and cutting main shaft formed, avoided blockking up and the rotatory reliability of cutting because of advancing the oil filler point that the coal slime leads to.
Drawings
Fig. 1 is a schematic structural diagram of a cutting device of a three-hole spline-connected internal spray longitudinal shaft cantilever type tunneling machine;
figure 2 is a top view of the cutting head;
figure 3 is a cross-sectional view of the cutting head;
figure 4 is a top view of the cutterhead body;
figure 5 is a bottom view of the cutterhead body;
FIG. 6 is a schematic structural diagram of a composite wear-resistant plate I;
FIG. 7 is a schematic structural diagram of a composite wear plate II;
FIG. 8 is a schematic structural view of a composite wear block;
FIG. 9 is a schematic structural view of a half ring;
FIG. 10 is a cross-sectional view of the half ring;
FIG. 11 is a schematic view of a tooth holder;
fig. 12 is a cross-sectional view of the tooth holder.
In the figure: 1-a cutting head; 2-cutting pick; 3-a retainer ring; 4-hexagon socket cap screw; 5-a linear nozzle; 6-a combination washer; 7-cutting the main shaft; 8-cantilever section; 9-oil filler point II; 10-a toothholder; 11-a flow guide plate; 12-a cutter head body; 12-1-internal spline housing; 12-2-a main head body; 13-a plug screw; 14-composite wear-resisting plate I; 15-composite wear-resisting plate II; 16-1-bolt; 16-2-washers; 16-3-circular ring-shaped connecting plate; 16-4-dust ring; 16-5-half ring; 17-a composite wear block; 18-connecting plate I; 19-connecting plate II; a-a base layer; b-wear resistant layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a cutting device of a three-hole spline-connected internal spray longitudinal shaft cantilever type heading machine, which comprises a cantilever section 8 and a cutting head 1; the cutting head 1 comprises a cutting head body 12, a tooth holder 10 and cutting teeth 2; the cutterhead body 12 comprises a main body 12-2 and an internal spline housing 12-1; the shape of the main head body 12-2 is cylindrical, truncated cone-shaped and hemispherical from the bottom to the top in sequence, a tooth holder 10 is welded outside the main head body 12-2 in a mode of a plurality of spiral lines, a plurality of tooth holders 10 are arranged on each spiral line, a cutting tooth 2 is installed in each tooth holder 10, and the cutting tooth 2 is prevented from falling off through a retainer ring 3; the inner spline housing 12-1 is welded in the main head body 12-2, the central axis is collinear with the central axis of the main head body 12-2, the top is provided with 3 counter bores, and the 3 counter bores are arranged in an equilateral triangle; the cutting head 1 is connected with a cutting spindle 7 at the front end of the cantilever section 8 through three hexagon socket head cap screws 4.
Adopt three hexagonal socket head cap screws to connect cutterhead 1 and cutting spindle 7, form the equilateral triangle shape that stability is the highest, improve the stability and the reliability of connection of cutterhead 1 and cutting spindle 7, reduced cutterhead 1 because of vibrations lead to with the cutting spindle 7 probability that becomes flexible even drops.
Further, the cutting head 1 also comprises a composite wear-resisting plate I14, a composite wear-resisting plate II 15 and a composite wear-resisting block 17; the composite wear-resistant plate I14 is of an arc-shaped plate-shaped structure and comprises a base layer A and a wear-resistant layer B which are uniformly distributed on the cylindrical circumferential surface of the main head body 12-2, and the base layer is welded with the main head body 12-2; the composite wear-resisting plate II 15 is of a fan-shaped annular plate structure and comprises a base layer A and a wear-resisting layer B which are uniformly distributed on the cylindrical annular end face of the main head body 12-2, and the base layer is welded with the main head body 12-2; the composite wear-resistant blocks 17 comprise a base layer A of a triangular block structure and a wear-resistant layer B arranged outside the base layer A, the base layer A is provided with an arc-shaped surface, the arc-shaped surface is welded with the main head body 12-2, the thickness of the base layer A is gradually reduced from the end part where the arc-shaped surface is welded with the main head body 12-2 to the surface opposite to the end part (the thickness is gradually reduced according to the arrow direction in figure 8) to form an inclination angle, the wear-resistant layer B is positioned on the side surface of the base layer A facing the bottom opening of the main head body 12-2 and the outer side surface opposite to the arc-shaped surface, and the composite wear-resistant blocks 17 are uniformly distributed on the cylindrical circumferential surface of the main head body 12-2 and are arranged in a staggered mode with the composite wear-resistant plates I14.
Three composite wear plates I14, II 15 and 17 with different overall dimensions are uniformly welded on the bottom surface and the circumferential surface of the large end of the cutting head 1, so that the wear resistance of the large end of the cutting head 1 is improved. Particularly, the composite wear-resistant block 17 is designed into an inclination-angle-type triangular shape for the first time, so that the efficiency of removing and guiding the float coal crushed rocks can be improved, and the contact area between the large end of the cutting head 1 and the coal rock fragments is reduced. The base layer A is contacted with the main head body 12-2, so that the welding firmness can be improved; the wear-resistant layer B faces outwards, and the wear resistance of the wear-resistant layer B in contact with coal rock is improved.
Furthermore, an annular boss welded with the inner spline housing 12-1 is arranged on the inner wall of the main head body 12-2, two connecting plates I18 are welded on the side, facing the opening at the bottom of the main head body 12-2, of the annular boss, and the two connecting plates I18 are arranged along the diameter of the main head body 12-2; the front end of cantilever section 8 is provided with connecting plate II 19, and II 19 of connecting plate are laminated with I18 of connecting plate, and two II 19 of connecting plate are located the different sides of two I18 of connecting plate respectively.
When the cutting head 1 is connected with the cutting spindle 7, the two connecting plates I18 are attached to the connecting plate II 19 arranged at the front end of the cantilever section 8, and the two connecting plates II 19 are respectively positioned on different sides of the two connecting plates I18, so that the torque generated by cutting rotation after the internal spline housing 12-1 and the cutting spindle 7 are connected through the external spline is reduced, and the reliability and the durability of spline fit are improved.
Furthermore, the main head body 12-2 is provided with marking holes which are arranged with the same diameter as the two connecting plates I18 so as to be matched with the connecting plates II 19 during installation.
Further, the three-hole spline-connected cutting head 1 of the inner spray longitudinal shaft cantilever type heading machine also comprises a dustproof device, wherein the dustproof device comprises a circular connecting plate 16-3, two semi-rings 16-5 and a dustproof ring 16-4; the annular connecting plate 16-3 is welded on the inner side of the main head body 12-2 and is vertical to the central axis of the main head body 12-2; two half rings 16-5 are detachably arranged on the side surface of the circular ring-shaped connecting plate 16-3 facing the opening at the bottom of the main head body 12-2, and a dust-proof ring 16-4 is arranged in a groove at the inner diameter of the half ring 16-5. The dust-proof ring 16-4 is closely contacted with the cantilever section 8, so that the dust-proof performance can be improved.
Further, the two half rings 16-5 are mounted on the circular connecting plate 16-3 by means of bolts 16-1 and washers 16-2. By means of the detachable semi-rings, the dust-proof rings 16-4 can be replaced conveniently and timely, and the dust resistance of the interior of the cutting head 1 and the interior of the cutting spindle 7 can be improved.
Further, the dust ring 16-4 is made of felt or packing.
Furthermore, the closed space formed by welding the inner spline housing 12-1 and the annular boss is a water cavity, a water hole communicated with the water cavity is arranged on the main head body 12-2, and a linear nozzle 5 and a combined gasket 6 are arranged in the water hole. The water in the water cavity flows to the linear nozzle 5 from the water hole, so that the temperature of the cutting tooth 2 during cutting operation is timely reduced, the abrasion of the cutting tooth 2 is effectively reduced, and the service life is prolonged.
Furthermore, a guide plate 11 is welded outside the main head body 12-2, and the guide plate 11 is welded to the preset tooth holder from bottom to top from the side of the first tooth holder of each spiral line at the bottom of the main head body 12-2. The guide plate 11 is used for leading out fragments in the coal and rock cutting process of the cutting head 1 in a cut and the like, and the cutting efficiency is improved.
Furthermore, an oil filling hole I is formed in the main head body 12-2, and a screw plug 13 is installed in the oil filling hole I; an oil filling hole II 9 is further formed in the cantilever section 8, and the oil filling hole II 9 and the oil filling hole I are arranged concentrically. The cantilever section 8 can be oiled through the oil injection hole I.
Further, the arrangement of toothholder 10 adopts 3 helix designs according to certain constraint conditions, adopts the form arrangement of a line tooth, 13 toothholders 10 of every helix, every cutterhead 1 contains 39 toothholders, toothholder 10 adopts 21CrNiMo6 material forging to form, possesses better shock resistance and wearability, J type groove is all opened to toothholder 10 bottom, increase welding strength, reduce the rate of opening welding of the cutting in-process toothholder 10 rear end, improve the effective life-span of toothholder 10. The baffle 11 is welded to the 11 th tooth seat from the bottom to the top of the first tooth seat side of each spiral line.
Further, the cutting pick 2 is a pick-type cutting pick.
The working process of the cutting device of the three-hole spline-connected inner spray longitudinal shaft cantilever type heading machine is as follows:
after the cutting motor is started, the cutting spindle 7 is driven to rotate at a specified rotating speed through the speed reducer, the external splines of the cutting spindle 7 are matched with the internal spline housing 12-1 of the main head body 12-2, and meanwhile, the two connecting plates II 19 at the front end of the cantilever section 8 are matched with the two connecting plates I18 inside the main head body 12-2 (the abrasion of the internal spline housing 12-1 and the cutting spindle 7 on the splines due to the rotating torque when the splines are matched can be reduced, so that the reliability of the cutting head during cutting operation is improved), the cutting head is driven to rotate, and the cutting operation is further carried out on a coal roadway;
interior spraying at first gets into the inside water cavity of cutterhead through the inside water hole of cutting main shaft 7 from the 8 outsides of cantilever section to through the water hole with water smoke form blowout to the regional cutting pick tooth point department in cutterhead middle part through linear nozzle 5, realize effectively reducing cutting pick 2 wearing and tearing, improve life to cutting pick 2 in time cooling.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A cutting device of a three-hole spline-connected internal spray longitudinal shaft cantilever type heading machine is characterized by comprising a cantilever section and a cutting head; the cutting head comprises a cutting head body, a tooth holder and cutting teeth;
the cutting head body comprises a main head body and an inner spline sleeve;
the main head body is cylindrical, truncated cone-shaped and hemispherical from the bottom to the top, tooth holders are welded outside the main head body in a mode of a plurality of spiral lines, a plurality of tooth holders are arranged on each spiral line, J-shaped grooves are formed in the bottoms of the tooth holders, and cutting teeth are arranged in the tooth holders;
the inner spline sleeve is welded in the main head body, the central shaft is collinear with the central shaft of the main head body, 3 counter bores are arranged at the top of the inner spline sleeve, and the 3 counter bores are arranged in an equilateral triangle;
the cutting head is connected with a cutting spindle at the front end of the cantilever section through three hexagon socket head cap screws.
2. The three-hole splined inner spray longitudinal shaft cantilever type roadheader cutting device according to claim 1, wherein the inner wall of the main head body is provided with an annular boss welded with the inner spline housing, the side of the annular boss facing the bottom opening of the main head body is welded with two connecting plates I, and the two connecting plates I are arranged along the diameter of the main head body;
the front end of cantilever section is provided with connecting plate II, and connecting plate II is laminated with connecting plate I, and two connecting plates II are located the different sides of two connecting plates I respectively.
3. The three-hole splined internal spray longitudinal shaft boom type roadheader cutting device according to claim 2, wherein the main head body is provided with marking holes, and the marking holes are arranged with the same diameter as the two connecting plates I.
4. The three-hole splined inner spray longitudinal shaft cantilever type roadheader cutting device according to claim 3, wherein the main head body is provided with an oil injection hole I, and a screw plug is arranged in the oil injection hole I;
an oil filling hole II is formed in the cantilever section and is concentrically arranged with the oil filling hole I.
5. The three-hole splined internal spray longitudinal shaft boom type roadheader cutting device according to claim 4, wherein a deflector is welded outside the main head body, and the deflector is welded from the bottom to the top of the first tooth base side of each helix at the bottom of the main head body to the preset tooth base.
6. The three-hole splined internal spray longitudinal shaft boom type roadheader cutting device according to claim 5, wherein the closed space formed by welding the internal spline housing and the annular boss is a water cavity, the main head body is provided with water holes communicated with the water cavity, and the water holes are internally provided with the linear nozzles and the combined gaskets.
7. The three-hole splined internal spray longitudinal shaft boom miner cutting apparatus of claim 6, further comprising a dust guard comprising a circular connecting plate, two half rings and a dust ring;
the annular connecting plate is welded on the inner side of the main head body and is vertical to the central shaft of the main head body;
two semi-rings detachable install the side at the ring shape connecting plate towards main head body bottom opening, and the slot installation dust ring of semi-ring internal diameter department.
8. The three-hole splined internal spray longitudinal shaft boom cutter assembly of claim 7, wherein two half rings are mounted on the annular connecting plate by bolts and washers.
9. The three-hole splined internal spray longitudinal shaft boom cutter assembly of claim 7, wherein the dust collar is made of felt or packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122676477.XU CN216240623U (en) | 2021-11-04 | 2021-11-04 | Three-hole spline-connected cutting device of inner-spraying longitudinal-shaft cantilever type heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122676477.XU CN216240623U (en) | 2021-11-04 | 2021-11-04 | Three-hole spline-connected cutting device of inner-spraying longitudinal-shaft cantilever type heading machine |
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| Publication Number | Publication Date |
|---|---|
| CN216240623U true CN216240623U (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122676477.XU Active CN216240623U (en) | 2021-11-04 | 2021-11-04 | Three-hole spline-connected cutting device of inner-spraying longitudinal-shaft cantilever type heading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216240623U (en) |
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2021
- 2021-11-04 CN CN202122676477.XU patent/CN216240623U/en active Active
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