CN211715127U - Hexagonal locking cutting head with detachable bevel gear seat assembly - Google Patents
Hexagonal locking cutting head with detachable bevel gear seat assembly Download PDFInfo
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- CN211715127U CN211715127U CN202020258693.5U CN202020258693U CN211715127U CN 211715127 U CN211715127 U CN 211715127U CN 202020258693 U CN202020258693 U CN 202020258693U CN 211715127 U CN211715127 U CN 211715127U
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- bevel gear
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- 238000005520 cutting process Methods 0.000 title claims abstract description 87
- 238000003780 insertion Methods 0.000 claims abstract description 11
- 230000037431 insertion Effects 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 2
- 238000005493 welding type Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
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Abstract
The utility model provides a hexagonal locking cutting head with a detachable bevel gear tooth seat assembly, belonging to the technical field of cutting device accessories of coal mining machinery, comprising a bevel gear tooth seat, a connecting seat, a fixed block and a cutting head; the bevel gear seat is provided with a mounting hole, and the lower part of the bevel gear seat is provided with a quick tenon; the connecting seat is welded on the surface of the cutting head and is provided with an insertion groove and a fixing block mounting position; a fixing groove is arranged on the fixing block mounting position; the bottom surface of the fixed block is provided with a stop key; the fixing groove and the stop key are both provided with screw holes, and the fixing screw penetrates through the screw holes to fix the fixing block on the fixing block mounting position; a convex large seam allowance, a connecting hexagon extending inwards from the top edge of the large seam allowance and a connecting end plate extending inwards from the top edge of the connecting hexagon are arranged in the cutting head; the connecting hexagon is a regular hexagon hole; the connecting end plate is provided with a small spigot and a mounting screw hole. The cutting head can be used for reliably connecting the cutting head and the intermediate shaft and realizing non-welding type quick replacement of the bevel gear tooth holder.
Description
Technical Field
The utility model belongs to the technical field of colliery excavating machinery cutting device accessory, specifically disclose a hexagonal closure cutterhead of bevel gear toothholder assembly can be dismantled in area.
Background
The cutting head is a key tool for rock breaking and tunneling of the tunneling machine and bears a very large cutting torque and impact loads generated by cutting teeth participating in rock breaking. The cutting head is usually in the form of an involute spline, a flange flat key or a tension sleeve at the output end of the reducer through an intermediate shaft. Under the action of rock breaking and strong impact load, the involute spline is easy to collapse and lose efficacy; the flange flat key connection structure can increase the diameter of the cutting head, so that the large end of the cutting head is seriously worn; the expansion sleeve may also fail to slide due to insufficient friction or a reduction in friction caused by other factors. The pick box is typically welded to the outer surface of the cutting head or cutting drum body and the pick is inserted into a mounting bore of the pick box. In the course of rock excavation after coal mining, there is often a significant wear phenomenon associated with the cutting pick and the holder. When the abrasion occurs on the cutting pick, the cutting pick can be taken out of the mounting hole of the cutting pick seat and replaced by a new cutting pick. However, when the pick box is worn, the pick box cannot be replaced because the pick box is welded with the cutting head or the cutting drum body, and the cutting head or the cutting drum has to be lifted for maintenance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hexagonal closure cutterhead of awl tooth toothholder assembly can be dismantled in area can enough realize the reliable connection of cutterhead and jackshaft, can realize the non-welded formula fast loading and unloading of awl tooth toothholder again.
In order to achieve the purpose, the utility model provides a hexagonal locking cutting head with a detachable bevel gear tooth seat assembly, which comprises a bevel gear tooth seat, a connecting seat, a fixed block and a cutting head; the conical tooth holder is provided with a mounting hole matched with the conical cutting tooth, and the lower part of the conical tooth holder is provided with a quick tenon; the connecting seat is welded on the surface of the cutting head and is provided with an inserting groove matched with the quick inserting tenon and a fixing block mounting position matched with the fixing block; the fixing block mounting position extends forwards from the insertion hole of the insertion groove and is provided with a fixing groove; the bottom surface of the fixed block is provided with a stop key matched with the fixed groove; the fixing groove and the stop key are both provided with screw holes, and the fixing screw penetrates through the screw holes to fix the fixing block on the fixing block mounting position; a convex large seam allowance, a connecting hexagon extending inwards from the top edge of the large seam allowance and a connecting end plate extending inwards from the top edge of the connecting hexagon are arranged in the cutting head; the connecting hexagon is a regular hexagon hole; the connecting end plate is provided with a small spigot and a mounting screw hole; the centers of the large spigot, the connecting hexagon and the small spigot are collinear with the center of the cutting head.
Further, the contact area between the front face of the bevel tooth seat and the chips is a separating face with an obtuse included angle.
Furthermore, a wear-resistant material distributing block forming an acute angle with the horizontal direction is embedded on the separating surface; the wear-resistant distributing block is made of hard alloy.
Furthermore, the fast tenon is a T-shaped tenon, the distance between the side positioning surfaces at two sides is gradually reduced from front to back, and the side positioning surfaces are in transitional connection with the back end surface through guide inclined surfaces; the inserting groove is matched with the fast inserting tenon.
Furthermore, the mounting hole of the bevel gear tooth seat comprises a first step hole, a second step hole and a third step hole, wherein the diameters of the first step hole, the second step hole and the third step hole are sequentially reduced from front to back; and the first stepped hole and the second stepped hole are internally provided with a lining ring in interference fit.
Furthermore, the hexagonal locking cutting head with the detachable taper tooth holder assembly further comprises a conical cutting tooth, a tooth handle of the conical cutting tooth is inserted into the lining ring, and a tooth shoulder abuts against the lining ring; the hardness of the liner ring is greater than that of the conical cutting pick.
Furthermore, the bottom surface of the tooth shoulder is provided with an annular concave shoulder; the lining ring is provided with a convex shoulder matched with the concave shoulder.
Furthermore, the side surface of the connecting seat corresponding to the mounting position of the fixed block is an anti-friction surface; the two sides of the fixed block are antifriction surfaces; the distance between the wear reducing surfaces on the two sides is gradually increased from front to back.
Furthermore, the bottom surface and the side surface of the connecting seat are in transition connection through an inward-inclined welding slope surface.
The utility model has the advantages that:
(1) the quick tenon of the bevel-tooth toothholder is matched with the insertion groove of the connecting seat to realize quick disassembly and assembly, the fixing block is used for being fixed on the connecting seat after the quick tenon is assembled with the insertion groove to seal the insertion hole of the insertion groove, so that the reliable connection of the bevel-tooth toothholder and the connecting seat is ensured, and the bevel-tooth toothholder is prevented from falling off in the cutting process;
(2) in the rotation process of the cutting head, six surfaces of the connecting hexagon can be in contact with corresponding surfaces of the middle shaft, so that the contact pressure can be effectively reduced, the failure of the spline caused by insufficient strength or reduced friction force of the expansion sleeve is avoided, the flange flat key connection structure is avoided, the diameter of the cutting head is effectively reduced, and the rock breaking capacity of the cutting head is improved;
(3) the cutterhead confirms the axial positioning position of the cutterhead on the intermediate shaft through the double-seam allowance structure, wherein the effective matching length of the small seam allowance is larger than that of the large seam allowance, therefore, when the cutterhead is connected with the intermediate shaft on the cutting arm, the small seam allowance is effectively matched, under the guiding action of the small seam allowance, the large seam allowance is matched, the difficulty of changing the cutterhead underground on site is reduced, the connecting end plate is provided with an installation screw hole for confirming the axial position of the cutterhead, and the installation bolt penetrates through the hole to connect the cutterhead and the intermediate shaft on the cutting arm into a whole.
Drawings
FIG. 1 is a schematic structural view of a hexagonally-locked cutting head with a removable bevel-tooth holder assembly;
FIG. 2 is an exploded view of the bevel-tooth toothholder, the connecting seat, and the fixing block;
FIG. 3 is another side view of the exploded view of FIG. 2;
FIG. 4 is a schematic structural view of a bevel gear seat;
FIG. 5 is an assembly view of the conical pick and the conical pick block;
FIG. 6 is an assembly view of the bevel gear tooth holder and the connecting seat;
FIG. 7 is a cross-sectional view taken in the direction of assembly A-A of FIG. 6;
fig. 8 is a cross-sectional view in the direction of assembly B-B shown in fig. 6.
In the figure: 1-a bevel gear tooth holder; 1.1-mounting holes; 1.2-inserting tenon quickly; 1.3-separating surface; 1.4-wear resistant distributor block; 1.5-side locating surface; 1.6-guiding inclined plane; 2-a connecting seat; 2.1-inserting grooves; 2.2-fixed groove; 2.3-welding the slope; 3, fixing blocks; 3.1-stop key; 4-cutting head; 4.1-big spigot; 4.2-linked hexagonal; 4.3-connecting end plates; 4.4-small spigot; 4.5-installing screw holes; 5-a conical cutting pick; 5.1-concave shoulder; 6-fixing screws; 7-a liner ring; 7.1-shoulder; 8-wear reduction surface.
Detailed Description
The embodiment provides a hexagonal locking cutting head with a detachable bevel gear tooth seat assembly, which comprises a bevel gear tooth seat 1, a connecting seat 2, a fixing block 3 and a cutting head 4; the conical tooth holder 1 is provided with a mounting hole 1.1 matched with the conical cutting tooth 5, and the lower part of the conical tooth holder is provided with a quick tenon 1.2; the connecting seat 2 is welded on the surface of the cutting head 4 and is provided with an inserting groove 2.1 matched with the fast inserting tenon 1.2 and a fixing block mounting position matched with the fixing block 3; the mounting position of the fixed block extends forwards from the insertion opening of the insertion groove 2.1 and is provided with a fixed groove 2.2; the bottom surface of the fixed block 3 is provided with a stop key 3.1 matched with the fixed groove 2.2; screw holes are formed in the fixing groove 2.2 and the stop key 3.1, and the fixing screw 6 penetrates through the screw holes to fix the fixing block 3 on a fixing block mounting position; a convex large seam allowance 4.1, a connecting hexagon 4.2 extending inwards from the top edge of the large seam allowance 4.1 and a connecting end plate 4.3 extending inwards from the top edge of the connecting hexagon 4.2 are arranged in the cutting head 4; the connecting hexagon 4.2 is a regular hexagon hole; a small spigot 4.4 and a mounting screw hole 4.5 are arranged on the connecting end plate 4.3; the centers of the big spigot 4.1, the connecting hexagon 4.2 and the small spigot 4.4 are collinear with the center of the cutting head 4.
The fast tenon 1.2 of the bevel-tooth toothholder 1 is matched with the inserting groove 2.1 of the connecting seat 2 to realize fast disassembly and assembly, the fixing block 3 is used for being fixed on the connecting seat 2 after the fast tenon 1.2 and the inserting groove 2.1 are assembled, the inserting opening of the inserting groove 2.1 is closed, the reliable connection of the bevel-tooth toothholder 1 and the connecting seat 2 is ensured, and the bevel-tooth toothholder 1 is prevented from falling off in the cutting process; in the rotation process of the cutting head 4, six surfaces of the connecting hexagon 4.2 can be in contact with corresponding surfaces of the middle shaft, so that the contact pressure can be effectively reduced, the failure of the spline caused by insufficient strength or reduced friction force of the expansion sleeve is avoided, the flange flat key connection structure is avoided, the diameter of the cutting head 4 is effectively reduced, and the rock breaking capacity of the cutting head 4 is improved; the cutterhead 4 confirms the axial positioning position of the cutterhead on the intermediate shaft through a double-seam allowance structure, wherein the effective matching length of the small seam allowance 4.4 is larger than that of the large seam allowance 4.1, therefore, when the cutterhead 4 is connected with the intermediate shaft on the cutterhead arm, the small seam allowance 4.4 is effectively matched, under the guiding action of the small seam allowance 4.4, the large seam allowance 4.1 enters into matching, the difficulty of replacing the cutterhead on the underground site is reduced, the connecting end plate 4.3 is provided with a mounting screw hole 4.5 for confirming the axial position of the cutterhead 4, and the mounting bolt penetrates through the hole to connect the cutterhead 4 and the intermediate shaft on the cutterhead arm into a whole.
Furthermore, the contact area of the front surface of the conical tooth base 1 and the cutting chips is a separating surface 1.3 with an obtuse included angle, so that the impact abrasion of the cutting chips and other abrasive materials on the tooth base can be effectively reduced when the cutting head rotates. The obtuse angle is based primarily on the angle of the cutting pick measured after wear in actual operation, and is typically not less than 90 ° and between 120 ° and 160 °. The smaller the obtuse angle, the smaller the resistance, the more significant the wear-inhibiting effect, and the better the use effect, without lowering the overall strength of the bevel-tooth holder 1. The angle is schematically shown as 150.
Furthermore, a wear-resistant distributing block 1.4 forming an acute angle with the horizontal direction is embedded on the separating surface 1.3, so that the cutting chips are smoothly discharged along the moving direction of the bevel-tooth toothholder 1; the wear-resistant distributor block 1.4 is made of hard alloy. When the cutting head 4 cuts the rock, the linear velocity of the tooth tip (the hard alloy 1.6 part) does not exceed the design standard of cutting the coal rock, and the reasonable range of the acute angle is 20-30 degrees. This angle is shown to be about 22.
Furthermore, the fast tenon 1.2 is a T-shaped tenon, the distance between the side positioning surfaces 1.5 at the two sides is gradually reduced from front to back, and the side positioning surfaces 1.5 are in transitional connection with the back end surface through guide inclined surfaces 1.6; the inserting groove 2.1 is matched with the fast tenon 1.2. The side positioning surface 1.5 and the guide inclined surface 1.6 of the quick tenon 1.2 can be quickly inserted along the inserting groove 2.1, so that the automatic positioning in the inserting direction is realized. The included angle between the side positioning surfaces 1.5 at the two sides is a self-positioning angle.
Further, the mounting hole 1.1 of the bevel gear tooth base 1 comprises a first step hole, a second step hole and a third step hole, wherein the diameters of the first step hole, the second step hole and the third step hole are sequentially reduced from front to back; the first stepped hole and the second stepped hole are internally provided with the lining ring 7 in interference fit, so that the first stepped hole and the second stepped hole form an integral structure, and the connection reliability of the bevel gear base 1 and the lining ring 7 is improved.
Furthermore, the dry cutting head or the cutting drum assembly of the detachable tooth holder further comprises a conical cutting pick 5, a tooth handle of the conical cutting pick 5 is inserted into the lining ring 7, and a tooth shoulder abuts against the lining ring 7; the hardness of the backing ring 7 is greater than the hardness of the conical pick 5. The lining ring 7 is made of high-wear-resistance alloy steel through heat treatment, when the conical cutting pick 5 rotates in the lining ring 7 to generate frictional wear, the hardness of the lining ring 7 is higher than that of the conical cutting pick 5, so that the wear mainly occurs on the shoulder and the end face in contact with the lining ring 7, and when the conical cutting pick 5 fails due to wear, the easily damaged part, namely the conical cutting pick 5, can be replaced.
Further, the bottom surface of the tooth shoulder is provided with an annular concave shoulder 5.1; the lining ring 7 is provided with a shoulder 7.1 which is matched with the concave shoulder 5.1. The tooth shoulder and the lining ring 7 are mutually buckled through an annular conical surface, and the tooth shoulder can freely rotate in the lining ring 7 and cannot be separated from the lining ring 7. Tooth shoulder and backing ring 5 pass through annular conical surface and contact each other, from effective increase area of contact, reduce the contact specific pressure, reduce wearing and tearing, and shoulder-concave shoulder lock structure can also play in addition prevents that toper pick 5 from rocking because assembly gap or the toper pick 5 that leads to because the wearing and tearing of shank cylinder surface from in mounting hole 1.1, can effectively stabilize toper pick 5 at the cutting in-process.
Further, the side surface of the connecting seat 2 corresponding to the mounting position of the fixed block is an anti-friction surface 8; the two sides of the fixed block 3 are provided with antifriction surfaces 8; the distance between the two side antifriction surfaces 8 is gradually increased from front to back, a right angle is formed in the motion direction of the connecting seat 2, and the rotary working resistance of the cutting head 4 is reduced.
Further, the bottom surface and the side surface of the connecting seat 2 are in transition connection through an inward inclined welding slope surface 2.3. The connecting socket 2 can be welded to the surface of the cutting head 4 by welding the ramp 2.3.
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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (9)
1. A hexagonal locking cutting head with a detachable bevel gear tooth seat assembly is characterized by comprising a bevel gear tooth seat, a connecting seat, a fixing block and a cutting head;
the conical tooth holder is provided with a mounting hole matched with the conical cutting tooth, and the lower part of the conical tooth holder is provided with a quick inserting tenon;
the connecting seat is welded on the surface of the cutting head and is provided with an inserting groove matched with the quick inserting tenon and a fixing block mounting position matched with the fixing block;
the fixing block mounting position extends forwards from the insertion hole of the insertion groove and is provided with a fixing groove;
the bottom surface of the fixed block is provided with a stop key matched with the fixed groove;
the fixing groove and the stop key are both provided with screw holes, and the fixing screw penetrates through the screw holes to fix the fixing block on the fixing block mounting position;
a convex large seam allowance, a connecting hexagon extending inwards from the top edge of the large seam allowance and a connecting end plate extending inwards from the top edge of the connecting hexagon are arranged in the cutting head;
the connecting hexagon is a regular hexagon hole;
the connecting end plate is provided with a small spigot and a mounting screw hole;
the centers of the large spigot, the connecting hexagon and the small spigot are collinear with the center of the cutting head.
2. The hexagonally locked cutting head with removable awl tooth holder assembly as set forth in claim 1 wherein the area of contact of the front face of the awl tooth holder with the swarf is a parting plane with an obtuse included angle.
3. The hexagonal locking cutting head with the detachable bevel gear seat assembly according to claim 2, wherein the separating surface is embedded with a wear-resistant material distributing block forming an acute angle with the horizontal direction;
the wear-resistant distributing block is made of hard alloy.
4. The hexagonal locking cutting head with the detachable bevel gear seat assembly according to claim 1, wherein the quick-inserting tenon is a T-shaped tenon, the distance between the side positioning surfaces at two sides is gradually reduced from front to back, and the side positioning surfaces are in transitional connection with the back end surface through guide inclined surfaces;
the inserting groove is matched with the quick inserting tenon.
5. The hexagonal locking cutter head with the detachable bevel gear tooth holder assembly according to claim 1, wherein the mounting hole of the bevel gear tooth holder comprises a first step hole, a second step hole and a third step hole, the diameters of which are sequentially reduced from front to back;
and the first stepped hole and the second stepped hole are internally provided with a lining ring in an interference fit manner.
6. The hexagonal locking cutting head with the detachable taper tooth holder assembly according to claim 5, further comprising a taper cutting tooth, wherein a tooth handle of the taper cutting tooth is inserted into the lining ring, and a tooth shoulder abuts against the lining ring;
the hardness of the lining ring is greater than that of the conical cutting pick.
7. The hexagonal locking cutter head with the detachable bevel gear tooth holder assembly according to claim 6, wherein the bottom surface of the tooth shoulder is provided with an annular concave shoulder;
and a convex shoulder matched with the concave shoulder is arranged on the lining ring.
8. The hexagonal locking cutting head with the detachable bevel gear seat assembly according to claim 1, wherein the side surface of the connecting seat corresponding to the mounting position of the fixing block is an anti-friction surface;
two sides of the fixed block are antifriction surfaces;
the distance between the wear reducing surfaces on the two sides is gradually increased from front to back.
9. The hexagonally-locked cutter head with a removable awl tooth holder assembly as in claim 8, wherein the bottom surface and the side surfaces of the connecting socket are transitionally connected by an inwardly-angled welding ramp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020258693.5U CN211715127U (en) | 2020-03-05 | 2020-03-05 | Hexagonal locking cutting head with detachable bevel gear seat assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020258693.5U CN211715127U (en) | 2020-03-05 | 2020-03-05 | Hexagonal locking cutting head with detachable bevel gear seat assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211715127U true CN211715127U (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020258693.5U Active CN211715127U (en) | 2020-03-05 | 2020-03-05 | Hexagonal locking cutting head with detachable bevel gear seat assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211715127U (en) |
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2020
- 2020-03-05 CN CN202020258693.5U patent/CN211715127U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A hexagonal locking cutting head with detachable conical tooth seat assembly Effective date of registration: 20230324 Granted publication date: 20201020 Pledgee: Bank of China Limited Taiyuan Pingyang sub branch Pledgor: Shanxi Zhongke Taitong industrial and mining equipment Co.,Ltd. Registration number: Y2023140000015 |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 9 Jingyuan South Road, Qixian Economic Development Zone, Jinzhong City, Shanxi Province, 030900 Patentee after: Zhongke Taitong Equipment Co.,Ltd. Address before: Room 621, Building 4, Incubation Base, No. 11 Kangshou Street, Taiyuan Tanghuai Industrial Park, Taiyuan Comprehensive Reform Demonstration Zone, Shanxi Province, 030032 Patentee before: Shanxi Zhongke Taitong industrial and mining equipment Co.,Ltd. |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20201020 Pledgee: Bank of China Limited Taiyuan Pingyang sub branch Pledgor: Shanxi Zhongke Taitong industrial and mining equipment Co.,Ltd. Registration number: Y2023140000015 |