CN217440031U - Disk cutter - Google Patents
Disk cutter Download PDFInfo
- Publication number
- CN217440031U CN217440031U CN202221335305.4U CN202221335305U CN217440031U CN 217440031 U CN217440031 U CN 217440031U CN 202221335305 U CN202221335305 U CN 202221335305U CN 217440031 U CN217440031 U CN 217440031U
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- cutter
- shaft
- hole
- cutter shaft
- annular cavity
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- Excavating Of Shafts Or Tunnels (AREA)
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Abstract
The utility model provides a disk cutter, which comprises a cutter body, a cutter ring surrounding the cutter body and a cutter shaft assembled in the cutter body; the inner wall of the cutter body is provided with a rectangular annular cavity and a semicircular annular cavity; the outer wall of the cutter shaft is provided with a semicircular annular cavity and a cutter shaft through hole, the cutter shaft through hole penetrates through the cutter shaft, and one end of the cutter shaft through hole is communicated with the semicircular annular cavity arranged on the outer wall of the cutter shaft; the rectangular ring cavity is internally provided with a cylindrical roller, and the circular ring cavity is internally provided with a spherical roller through the through hole of the cutter shaft in a rotating way. The utility model discloses replace the internal bearing of tool with cylindricality roller and spherical roller, can improve the load limit that disc cutter can bear, and make it not receive the influence of bearing load limit, prolong disc cutter's life, the axial force and the radial force that disc cutter during operation received can effectively be decomposed to spherical roller curved surface atress to can be more smooth rotatory in circular ring intracavity, and then make the rotatory smoothness of cutter ring, broken rock efficiency improves, suitable use as disc cutter.
Description
Technical Field
The utility model relates to an excavating tool in the field of rock and soil excavation, in particular to a disc cutter.
Background
The disc cutter is an excavating tool for crushing hard rock, is arranged at the head of large-scale trenchless construction equipment such as a shield, a TBM (tunnel boring machine), a jacking pipe and the like, and is used for cutting rock on a tunnel face and stripping the rock from the tunnel face. The method is widely applied to subway tunnels, railway tunnels, diversion tunnels and urban underground pipe network constructors.
Disc cutters are cutters with replaceable cutter rings, usually having a single-edge, double-edge and multiple-edge, and are usually mounted on the shield machine cutter head in a radial or spiral arrangement. The shield machine tunnels forwards under the pressure of the jack, the cutter head of the shield machine rotates, and the cutter arranged on the cutter head of the shield machine revolves along with the cutter head and rotates under the friction force and the pressure, so that the cutting edge of the cutter ring is utilized to perform rolling cutting on the surface of the rock. The disc cutter is arranged on the cutter head, a cutter ring of the hob is wedged with the rock under the thrust action of the cutter head, then the hob rotates passively along with the rotation of the cutter head to realize continuous rock breaking, and the disc cutter rotates around the central shaft of the cutter head on one hand and rotates around the axis of the disc cutter on the other hand; under the action of thrust and torque of the cutter head, the disc cutter cuts a series of concentric circular grooves on the face of the rock, and the disc cutter completes one-time rock breaking process.
As shown in the attached figure 1, the conventional disc cutter is internally provided with a tapered roller bearing, a cutter shaft penetrates through the bearing, and two ends of the cutter shaft are additionally provided with closed end covers to seal the bearing. The disc cutter drives the cutter ring to rotate through the tapered roller bearing, and when the disc cutter works, the disc cutter is subjected to the tangential friction force of the cutter ring and the action of the interaction force in the lateral direction besides the circumferential positive pressure of the cutter ring, so that the stress is complex. However, the inventor finds the following problems in the construction process: 1. the load capacity of the bearing directly influences the load capacity of the disc cutter, when the hardness of rock is high, the load which can be borne by the bearing is small, so that the shield tunneling machine cannot increase the thrust to propel the disc cutter continuously, the disc cutter can only grind a cutter ring on the basis, rock cannot be effectively broken, the cutter ring is abraded, and early failure of the cutter is easily caused; 2. the bearing damage is caused by the overweight load of the bearing in the hob, so that the disc hob can not work normally, the rock breaking effect is influenced, and the construction progress is delayed; 3. the service life of the bearing in the hob is limited, and the bearing needs to be replaced regularly after reaching the limit running time, so that time and labor are wasted, and the cost is increased. 4. When the hob is passively rotated, the contact surface between the cutter ring and rocks is large, the friction force is large, the resistance is large, the rotation of the bearing in the hob is not smooth enough, the tunneling efficiency is low, the conditions that the hob cutter ring is broken and the abrasion is too fast are easily caused, and the service life of the hob is greatly reduced. 5. When the inside bearing of hobbing cutter was changed, the dismouting flow is loaded down with trivial details, and the bearing inner race need use special desk-top press extrusion, and the construction process requirement is higher, will ensure leakproofness and rotation smoothness nature simultaneously, with changing the degree of difficulty big.
Disclosure of Invention
In view of at least one of above technical problem, the utility model discloses a disc cutter replaces the bearing rotation through inside cylindricality roller, the spherical roller of using of hobbing cutter, and arbor, cutter body directly act as the rolling element of cylindricality roller, spherical roller, solve extension disc cutter life, exempt from to change the technical problem of inner bearing.
The utility model provides a scheme that technical problem adopted is:
the disc cutter comprises a cutter body, a cutter ring and a cutter shaft, wherein the cutter ring surrounds the cutter body, and the cutter shaft is assembled in the cutter body;
the inner wall of the cutter body is provided with a rectangular annular cavity and a semicircular annular cavity;
the outer wall of the cutter shaft is provided with a semicircular annular cavity and a cutter shaft through hole, the cutter shaft through hole penetrates through the cutter shaft, and one end of the cutter shaft through hole is communicated with the semicircular annular cavity arranged on the outer wall of the cutter shaft;
when the cutter shaft is assembled in the cutter body, a semicircular annular cavity arranged on the inner wall of the cutter body is matched with a semicircular annular cavity arranged on the outer wall of the cutter shaft to jointly form a circular annular cavity, and at the moment, the circular annular cavity is communicated with the outside of the cutter shaft through hole;
at the moment, a rectangular ring cavity arranged on the inner wall of the cutter body and the outer wall of the cutter shaft form a closed cavity;
the rectangular ring cavity is internally provided with a cylindrical roller, and the circular ring cavity is internally provided with a spherical roller through the cutter shaft through hole in a rotating manner.
The positive effects are as follows: the utility model discloses replace the internal bearing of cutter with cylindricality roller and spherical roller, can improve the load limit that the disc cutter can bear, and make it not receive the influence of bearing load limit, prolong disc cutter's life, the axial force and the radial force that the disc cutter during operation received can effectively be decomposed to spherical roller curved surface atress to can be more smooth rotatory in circular ring intracavity, and then make the rotatory smoothness of cutter ring, broken rock efficiency improves, suitable use as disc cutter.
Drawings
FIG. 1 is a front sectional view of a conventional disc cutter;
FIG. 2 is a front sectional view of the present invention;
FIG. 3 is a cross-sectional view of a shaft hole closure.
In the figure, 1, a cutter body, 2, a cutter ring, 3, a cutter shaft, 31, a cutter shaft through hole, 32, an annular wing plate, 4, a cylindrical roller, 5, a spherical roller, 6, a shaft hole plugging piece, 61, a sealing groove, 62, a concave arc surface, 63, an internal thread, 64, an air overflow hole and 7, a closed end cover are arranged.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses a do the integral type with arbor and a side end cover, process out the hole that is fit for spherical roller and gets into on the arbor, pass through the arbor through-hole with spherical roller and enter into the hobbing cutter inner structure, spherical roller uses shaft hole shutoff arbor through-hole after entering, is in the same place arbor, cutter body group, and the column roller encircles cutter body radial arrangement in proper order, installs other accessories of hobbing cutters such as floating seal, locking end cover.
According to the figure, the disc cutter in the embodiment comprises a cutter body 1, a cutter ring 2 surrounding the cutter body 1 and a cutter shaft 3 assembled in the cutter body 1; the inner wall of the cutter body 1 is provided with a rectangular annular cavity and a semicircular annular cavity; a semicircular annular cavity and a cutter shaft through hole 31 are formed in the outer wall of the cutter shaft 3, the cutter shaft through hole 31 penetrates through the cutter shaft 3, the cutter shaft through hole 31 serves as a channel for mounting the spherical roller 5, and one end of the cutter shaft through hole 31 is communicated with the semicircular annular cavity formed in the outer wall of the cutter shaft 3; when the cutter shaft 3 is assembled in the cutter body 1, a semicircular annular cavity arranged on the inner wall of the cutter body 1 is matched with a semicircular annular cavity arranged on the outer wall of the cutter shaft 3 to jointly form a circular annular cavity, and at the moment, the circular annular cavity is communicated with the outside of the cutter shaft 3 through a cutter shaft through hole 31; a rectangular annular cavity arranged on the inner wall of the cutter body 1 and the outer wall of the cutter shaft 3 form a closed cavity; the cylindrical roller 4 is assembled in the rectangular annular cavity, when the cutter shaft 3 is assembled in the cutter body 1, the cylindrical roller 4 is contacted with the cutter shaft 3, the cylindrical roller 4 is assembled in the rectangular annular cavity, and the spherical roller 5 is rotatably assembled in the circular annular cavity through the cutter shaft through hole 31.
The cylindrical roller 4 and the spherical roller 5 are made of solid steel materials, the roller replaces a bearing in the cutter body 1, the load limit born by the disc cutter can be improved, the disc cutter is not affected by the load limit of the bearing, the curved surface stress of the spherical roller 5 can effectively decompose the axial force and the radial force born by the disc cutter during working, and therefore the disc cutter can rotate in the circular annular cavity more smoothly. Thereby leading the cutter ring to rotate smoothly and improving the rock breaking efficiency.
In some embodiments, the cutter shaft through hole 31 obliquely penetrates through the cutter shaft 3 to provide a reasonable filling position for the spherical roller, the spherical roller 5 is convenient to install, the shaft hole plugging piece 6 is movably installed in the cutter shaft through hole 31, and after the spherical rollers 5 are filled one by one, the cutter shaft through hole 31 is plugged by the shaft hole plugging piece 6; for guaranteeing spherical roller rotation smoothness, not because of the 6 jamming of shaft hole shutoff piece, concave arc face is handled with 5 contact surfaces of spherical roller to shaft hole shutoff piece 6, makes spherical roller 5 reduce frictional resistance, arbor through-hole 31 is the shoulder hole, and the downthehole diameter of first section through-hole is greater than the downthehole diameter of tail end through-hole, and is equipped with the retaining ring for retaining ring groove assembly hole in the head end through-hole that is close to the tail end through-hole for installation shaft hole shutoff piece 6.
A sealing groove 61 is arranged at the end of the shaft hole plugging piece 6 for assembling a sealing ring, so that the spherical annular cavity is sealed and isolated from the external environment, and further, the spherical roller 6 is prevented from being damaged due to the invasion of external impurities; the end of the shaft hole plugging piece 6 is provided with an internal thread 63 for pushing connection; the middle part of the shaft hole plugging piece 6 is provided with an air overflow hole 64, so that bubbles in lubricating oil can be discharged conveniently, and the contact surface of the tail end of the shaft hole plugging piece 6 and the spherical roller 5 is provided with a concave cambered surface 62, so that the spherical roller is ensured to rotate smoothly.
In order to make the cutter body 1 rotate smoothly relative to the cutter shaft 3, the number of the rectangular annular cavities on the inner wall of the cutter body 1 is set to be two and arranged at intervals, cylindrical rollers 4 are assembled in the rectangular annular cavities, and the number of the circular annular cavities is set to be one, and spherical rollers 5 are assembled in the circular annular cavities.
In order to distribute the load to which the disc cutter is subjected reasonably, the circular ring cavity is arranged between the two rectangular ring cavities.
The cutter ring 2 can be assembled with a single-edge cutter ring or a multi-edge cutter ring according to construction requirements.
In the embodiment disclosed in the application, one side of arbor 3 is equipped with annular pterygoid lamina 32, works as when arbor 3 is installed in cutter body 1, annular pterygoid lamina 32 plays the effect of end cover, will cutter body 1 one side is sealed, reduces the assembly part, avoids loaded down with trivial details installation procedure, presss from both sides the dress sealing member at annular pterygoid lamina 32 inboard, makes it can reach better sealed effect.
In order to ensure the tightness and compactness of the device, a closed end cover 7 is arranged on one side of the cutter body 1, a sealing element is clamped in the closed end cover, and an annular wing plate 32 is arranged on the other side of the cutter body and serves as an end cover, so that the disc cutter achieves the sealing effect.
In some embodiments, the through hole 31 of the cutter shaft is communicated from one end of the annular wing plate 32 on the cutter shaft 3 to the semicircular annular cavity, the inclined position of the through hole of the cutter shaft makes the installation of the spherical roller simple without influencing normal use, further, the inclined angle of the cutter shaft is between 45 degrees and 55 degrees, and the integral strength of the cutter shaft is not influenced, in this embodiment, the inclined angle of the through hole of the cutter shaft is 53 degrees.
In some embodiments, the end cap 7 is installed on one side of the cutter body 1, the end cap 7 is provided with a through hole, the cutter shaft 3 enters the cutter body 1 from the other side of the cutter body 1, passes through the through hole in the end cap 7 and is erected on the through hole, the cutter shaft 3 is embedded in the end cap in an interference fit manner, and at the moment, the end cap 7 simultaneously plays a role in sealing and supporting, so as to provide support for installation of the cutter shaft 3 and also provide stability for rotation of the cutter body 1 relative to the cutter shaft 3.
In some embodiments, a closed end cap 7 is mounted on one side of the cutter body 1, closing one side of the cutter body 1, and the cutter shaft 3 enters the cutter body 1 from the other side thereof.
The utility model has the characteristics that:
through cutter body 1, cylindrical roller 4, spherical roller 3 and 3 integral erection of arbor, constituted bearing arrangement jointly, disc cutter life effectively prolongs, only needs to change 2 alright continuous uses of cutter ring, and simple to operate is swift, sets up the arbor through-hole installation spherical roller assembly of slope on the arbor simple, and does not influence normal use, and the arbor through-hole communicates to semi-circular ring chamber from epaxial annular pterygoid lamina one end of arbor.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (9)
1. Disc cutter, its characterized in that: comprises a cutter body (1), a cutter ring (2) surrounding the cutter body (1) and a cutter shaft (3) assembled in the cutter body (1);
the inner wall of the cutter body (1) is provided with a rectangular annular cavity and a semicircular annular cavity;
the outer wall of the cutter shaft (3) is provided with a semicircular annular cavity and a cutter shaft through hole (31), the cutter shaft through hole (31) penetrates through the cutter shaft (3), and one end of the cutter shaft through hole (31) is communicated with the semicircular annular cavity arranged on the outer wall of the cutter shaft (3);
when the cutter shaft (3) is assembled in the cutter body (1), a semicircular annular cavity arranged on the inner wall of the cutter body (1) is matched with a semicircular annular cavity arranged on the outer wall of the cutter shaft (3) to jointly form a circular annular cavity, and at the moment, the circular annular cavity is communicated with the outside of the cutter shaft (3) through the cutter shaft through hole (31);
at the moment, a rectangular ring cavity arranged on the inner wall of the cutter body (1) and the outer wall of the cutter shaft (3) form a closed cavity;
cylindrical rollers (4) are assembled in the rectangular annular cavity, and spherical rollers (5) are rotatably assembled in the circular annular cavity through the cutter shaft through holes (31).
2. A disc cutter according to claim 1, characterised in that:
the number of the rectangular ring cavities is two and the rectangular ring cavities are arranged at intervals; the number of the circular ring cavities is one; the circular ring cavity is arranged between the two rectangular ring cavities.
3. A disc cutter according to claim 1, characterised in that:
the cutter shaft through hole (31) is a stepped hole, and a retainer ring for a retainer ring groove assembling hole is arranged in the head end through hole and used for installing the shaft hole plugging piece (6).
4. A disc cutter according to claim 1, characterised in that:
the cutter shaft through hole (31) is communicated to the semicircular annular cavity from one end of the annular wing plate on the cutter shaft (3), and the inclination angle of the cutter shaft through hole is 45-55 degrees.
5. A disc cutter according to claim 3, characterised in that:
shaft hole shutoff piece (6) end department sets up seal groove (61) assembly sealing washer, is equipped with internal thread (63) at shaft hole shutoff piece (6) tail end, is equipped with flash hole (64) in shaft hole shutoff piece (6) middle part, shaft hole shutoff piece (6) tail end sets up concave cambered surface (62) with spherical roller (5) contact surface.
6. A disc cutter according to claim 1, characterised in that:
the cutter ring (2) is a single-edge or multi-edge cutter ring.
7. A disc cutter according to claim 1, characterised in that:
one side of the cutter shaft (3) is provided with an annular wing plate (32).
8. A disc cutter according to claim 1, characterised in that:
and a closed end cover (7) is arranged on one side of the cutter body (1).
9. A disc cutter according to claim 8, characterised in that:
the closed end cover (7) is used as a support of the cutter shaft (3), and the cutter shaft (3) penetrates through the closed end cover (7) and is erected on the closed end cover; the closed end cover (7) seals one side of the cutter body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221335305.4U CN217440031U (en) | 2022-05-31 | 2022-05-31 | Disk cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221335305.4U CN217440031U (en) | 2022-05-31 | 2022-05-31 | Disk cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217440031U true CN217440031U (en) | 2022-09-16 |
Family
ID=83222068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221335305.4U Active CN217440031U (en) | 2022-05-31 | 2022-05-31 | Disk cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217440031U (en) |
-
2022
- 2022-05-31 CN CN202221335305.4U patent/CN217440031U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |