CN111686901A - Breaker cutter and arbor structure and breaker - Google Patents
Breaker cutter and arbor structure and breaker Download PDFInfo
- Publication number
- CN111686901A CN111686901A CN202010504768.8A CN202010504768A CN111686901A CN 111686901 A CN111686901 A CN 111686901A CN 202010504768 A CN202010504768 A CN 202010504768A CN 111686901 A CN111686901 A CN 111686901A
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- Prior art keywords
- edge
- cutter
- tool
- tool bit
- mounting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
- B02C18/186—Axially elongated knives
Abstract
The invention discloses a crusher cutter, and discloses a cutter shaft structure with the crusher cutter, and a crusher with the cutter shaft structure, wherein the crusher cutter comprises: blade holder and tool bit, the tool bit is equipped with the mounting surface of two relative settings, the tool bit can pass through mounting surface with the connection can be dismantled to the blade holder, mounting surface's edge is equipped with a plurality of groups cutting edge, mounting surface be equipped with the recess that the cutting edge corresponds, the lateral wall of recess with the lateral wall of tool bit forms the contained angle. The cutter can improve the utilization rate of raw materials of the cutter and reduce the use cost of the cutter.
Description
Technical Field
The invention relates to the technical field of crushing equipment, in particular to a crusher cutter, a cutter shaft structure and a crusher.
Background
The single-shaft crusher can control the discharge granularity, and is widely applied to crushing requirements of various solid wastes.
At present, a cutter of some common crushers is in a hexagonal shape, a cutting blade face of the cutter is provided with a plurality of edges, each edge can be used as a prismatic edge to cut, in order to guarantee a cutting effect, the cutting blade face needs to be hollowed out to form a back angle with the side face of the cutter, the opposite end face of the cutting blade face is a mounting plane used for mounting the cutter, the mounting plane is also provided with a plurality of edges, but as the cutting blade face is hollowed out, no plane is arranged for mounting after the cutter is turned over, therefore, the cutter can only be provided with one cutting blade face to cut, the prismatic edge of the cutting blade face needs to be replaced by a new cutter after being worn, the edges of the cutter cannot be fully utilized, the use cost of the cutter is improved, the replacement period of the cutter is short, and therefore, the shutdown time of equipment and the maintenance cost are increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a crusher cutter which can improve the utilization rate of raw materials of the cutter and reduce the use cost of the cutter.
The invention also provides a cutter shaft structure with the crusher cutter and a crusher with the cutter shaft structure.
According to a first aspect of the invention an embodiment of a crusher tool comprises: the tool bit is provided with two opposite installation planes, the tool bit can pass through the installation planes and the tool bit can be detachably connected, the edge of each installation plane is provided with a plurality of groups of cutting edges, each installation plane is provided with a groove corresponding to each cutting edge, and the side wall of each groove forms an included angle with the side wall of the tool bit.
The crusher cutter provided by the embodiment of the invention at least has the following beneficial effects: the mounting plane of two relative settings of tool bit all can be used for carrying out fixed mounting with the blade holder, mounting plane's edge is equipped with the cutting edge, can be used for the cutting, and mounting plane still be equipped with the recess, the lateral wall of recess forms the contained angle with the lateral wall of tool bit, make the cutting edge have the relief angle, do not influence the cutting effect, therefore, one of them mounting plane's cutting edge is worn and torn the back, can also overturn the tool bit, the mounting plane that has worn and torn is used for assembling with the blade holder, the cutting edge on the mounting plane that does not wear and tear can continue to cut, until two mounting plane's cutting edge all is worn and torn. From this, improve the raw and other materials utilization ratio of tool bit, reduce tool bit use cost, improve the life cycle of single tool bit, because change the tool bit and need equipment to shut down, consequently also reduced equipment and shut down length and maintenance cost.
According to some embodiments of the present invention, the cutting edge includes a first edge, a second edge and a cutting edge, the first edge and the second edge have an included angle, and the cutting edge is disposed between the first edge and the second edge, so that the cutting edge forms a clearance angle with a sidewall of the groove, thereby improving cutting efficiency of the cutting edge.
According to some embodiments of the invention, the tool bit is provided with a first mounting hole penetrating through two mounting planes, the tool holder is provided with a second mounting hole, the first mounting hole and the second mounting hole can be inserted and matched with the fastening bolt, and the side wall of the first mounting hole and/or the side wall of the second mounting hole is provided with an internal thread matched with the fastening bolt. From this, fastening bolt's pole portion inserts with first mounting hole and second mounting hole and establishes the cooperation, and then links to each other tool bit and blade holder, through fastening bolt and interior screw-thread fit, with tool bit and blade holder fastening locking, realizes dismantling fixedly of tool bit and blade holder.
According to some embodiments of the invention, the fastening bolt is sleeved with a gasket, and the gasket is used for increasing the stress area for fastening the fastening bolt, dispersing pressure and avoiding damaging the end face of the first mounting hole or the second mounting hole.
According to the arbor structure of the second aspect embodiment of the present invention, it comprises: the blade is configured as a crusher tool according to the above-described embodiment of the first aspect of the invention.
According to the cutter shaft structure provided by the embodiment of the invention, at least the following beneficial effects are achieved: in the structural cutter of arbor, the mounting plane of two relative settings of its tool bit all can be used for carrying out fixed mounting with the blade holder, mounting plane's edge is equipped with the cutting edge, can be used for the cutting, and the mounting plane still be equipped with the recess, make the cutting edge have the relief angle, do not influence the cutting effect, so, the back is worn and torn to one of them mounting plane's cutting edge, can also overturn the tool bit, the mounting plane that wears to fall is used for assembling with the blade holder, the cutting edge on the mounting plane of unworn can continue to cut, until two mounting plane's cutting edge all is worn and torn, just it is necessary with the tool bit. From this, improve the raw and other materials utilization ratio of tool bit, reduce tool bit use cost, improve the life cycle of single tool bit, and then reduce equipment and shut down time length and maintenance cost.
According to some embodiments of the invention, the cross section of the tool apron is square, and the side surface of the cutter shaft body is provided with a V-shaped groove matched with the side surface of the tool apron. The square end face is provided with a plurality of edges and corners to form a plurality of cutting edges, and the raw material utilization rate of a single cutter head is improved.
According to some embodiments of the invention, a plurality of the cutter grains are arranged along an axial direction of the cutter shaft body to form a row edge. The row blades can increase the effective cutting width of the cutter shaft body, and can effectively cut and crush the objects to be cut in the cutting width, so that the cutting efficiency is improved.
According to some embodiments of the invention, the row of blades are linear, wavy or zigzag, and the linear row of blades are convenient to arrange, so that the processing cost of the V-shaped groove on the cutter shaft is reduced; the wavy or zigzag row blades can effectively exert the torque of the crushing blades, and can avoid jamming, thereby ensuring the continuity of the whole cutting process.
According to some embodiments of the invention, two adjacent knife grains are attached to each other. Guarantee not have the clearance between two adjacent sword grains, the sword grain of the row sword that forms helps the arbor cutting force at the cutting in-process even, avoids appearing the condition that can not cut material or material card between two adjacent sword grains, is favorable to accelerating cutting speed, and then promotes cutting efficiency.
According to a third aspect embodiment of the invention, a crusher comprises: the arbor structure according to the above-described second aspect of the present invention.
According to the invention structure of the embodiment of the invention, the invention structure has at least the following beneficial effects:
the breaker is provided with the arbor structure, in the cutter on the arbor structure, the mounting surface of two relative settings of its tool bit all can be used for carrying out fixed mounting with the blade holder, mounting surface's edge is equipped with the cutting edge, can be used for the cutting, and mounting surface still be equipped with the recess, make the cutting edge have the relief angle, do not influence the cutting effect, therefore, one of them mounting surface's cutting edge is worn and torn the back, can also overturn the tool bit, the mounting surface that wears out is used for assembling with the blade holder, the cutting edge on the mounting surface that does not wear and tear can continue to cut, until two mounting surface's cutting edge all is worn and torn, just it is necessary. From this, improve the raw and other materials utilization ratio of tool bit, reduce tool bit use cost, improve the life cycle of single tool bit, and then reduce equipment and shut down time length and maintenance cost.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a crusher tool in accordance with an embodiment of the present invention;
FIG. 2 is an exploded schematic view of the crusher knife shown in FIG. 1;
FIG. 3 is a schematic view of a cutter head of the crusher tool shown in FIG. 1;
FIG. 4 is a side view of the cutter head shown in FIG. 3;
fig. 5 is a schematic view of a cutter shaft structure according to an embodiment of the present invention.
Reference numerals:
the tool holder 100, the second mounting hole 110, the tool bit 200, the mounting plane 210, the cutting edge 220, the cutting edge 221, the first edge 222, the second edge 223, the groove 230, the first mounting hole 240, the fastening bolt 310, the spacer 320, the relief angle a, the arbor body 400, the row edge 500, and the insert 510.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, and the meaning of a plurality of means is more than two, if there is a description to the first and the second for the purpose of distinguishing technical features, but it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
As shown in fig. 1 and 2, a crusher tool according to an embodiment of the first aspect of the present invention comprises: the tool comprises a tool apron 100 and a tool bit 200, wherein the tool bit 200 is provided with two opposite installation planes 210, the tool bit 200 can be detachably connected with the tool apron 100 through the installation planes 210, the edge of each installation plane 210 is provided with a plurality of groups of cutting edges 220, the installation plane 210 is provided with a groove 230 corresponding to the cutting edges 220, and the side wall of the groove 230 forms an included angle with the side wall of the tool bit 200.
Specifically, two opposite mounting planes 210 of the tool bit 200 can be used to be fixedly mounted on the tool holder 100, the edge of the mounting plane 210 is provided with a cutting edge 220 for cutting, and the mounting plane 210 is further provided with a groove 230, and the side wall of the groove 230 forms an included angle with the side wall of the tool bit 200, so that the cutting edge 220 has a relief angle without affecting the cutting effect, wherein the angle a of the relief angle can be set to 40 degrees to 50 degrees, and a better cutting effect can be achieved;
therefore, after the cutting edge 220 of one of the mounting planes 210 is worn, the tool bit 200 can be turned over, the worn mounting plane 210 is used to assemble with the tool holder 100, and the cutting edge 220 of the unworn mounting plane 210 can continue to cut until the cutting edges 220 of both mounting planes 210 are worn, so that it is not necessary to replace the tool bit 200 with a new one. Therefore, the utilization rate of raw materials of the cutter head 200 is improved, the use cost of the cutter head 200 is reduced, the service cycle of a single cutter head 200 is prolonged, and equipment shutdown time and maintenance cost are reduced due to the fact that equipment is required to be shut down when the cutter head is replaced;
in order to detachably connect the tool bit 200 to the tool holder 100 through the mounting plane 210, mounting structures may be disposed on the tool bit 200 and the tool holder 100, the mounting structures may be bolt fixing holes, threaded holes, and the like, and are respectively disposed on the mounting plane 210 and the end surface of the tool holder 100, and the tool bit 200 and the tool holder 100 are fixedly connected through fastening bolts 310; the mounting structure can also be a buckle and a clamping groove, for example, the wall around the mounting structure tool apron 100 extends out of the buckle, and the side wall of the tool bit 200 is provided with a clamping groove matched with the buckle in a clamping manner, so as to realize the detachable fixation of the tool bit. The specific arrangement of the mounting structure will become apparent from the following description.
In some embodiments of the present invention, as shown in fig. 3, the cutting edge 220 includes a first edge 222, a second edge 223 and a cutting edge 221, the first edge 222 and the second edge 223 have an included angle, and the cutting edge 221 is disposed between the first edge 222 and the second edge 223, so that the cutting edge 221 and the sidewall of the groove 230 form a clearance angle a, which improves the cutting efficiency of the cutting edge 220. Specifically, the cutting head 200, as a wear-removing member of the cutting tool, may be substantially configured as a square block, wherein two opposite end surfaces are used as mounting planes 210, one mounting plane 210 has four edges, two adjacent edges are a first edge 222 and a second edge 223, which intersect to form an edge angle, which is a cutting edge 221, the cutting edge 220 includes the first edge 222, the second edge 223 and the cutting edge 221, as shown in fig. 4, in order to ensure the cutting effect of the cutting edge 220, a groove 230 corresponding to the cutting edge 220 needs to be dug on the mounting plane 210, so that the cutting edge 220 has a relief angle a; in practical application, each cutting needs one cutting edge 220, so that two cutting edges 220 can be worn by one mounting plane 210, and each tool bit 200 is provided with two mounting planes 210, so that four cutting edges 220 can be worn by each tool bit 200, the number of the usable cutting edges 220 is doubled compared with the two times of the wear of the same type of conventional tool bit 200, and the utilization rate of wear-eliminating parts of the tool is improved.
In some embodiments of the present invention, as shown in fig. 1 and 2, the present invention further includes a fastening bolt 310, the cutting head 200 is provided with a first mounting hole 240 penetrating through the two mounting planes 210, the tool holder 100 is provided with a second mounting hole 110, both the first mounting hole 240 and the second mounting hole 110 can be inserted and matched with the fastening bolt 310, and a side wall of the first mounting hole 240 and/or a side wall of the second mounting hole 110 is provided with an internal thread matched with the fastening bolt 310. Therefore, the shaft of the fastening bolt 310 is inserted into and matched with the first mounting hole 240 and the second mounting hole 110, so as to connect the tool bit 200 with the tool holder 100, and the fastening bolt 310 is matched with the internal thread to fasten and lock the tool bit 200 with the tool holder 100, so that the tool bit 200 and the tool holder 100 can be detachably fixed.
In some embodiments, the second mounting hole 110 penetrates through two ends of the tool holder 100, and the internal thread is disposed on a side wall of the first mounting hole 240, when the tool bit 200 is mounted, as shown in fig. 1 and fig. 2, one end of the shaft portion of the fastening bolt 310 penetrates through the second mounting hole 110 from one end of the tool holder 100, and is in threaded fit with the first mounting hole 240 of the tool bit, the head of the fastening bolt 310 limits the end surface of the tool holder 100, and at this time, the head of the fastening bolt 310 and the mounting plane 210 of the tool bit 200 clamp and fix the tool holder 100, so that the tool bit 200 and the tool holder 100 are firmly fixed, and the tool bit 200 and the tool holder 100 are detachably fixed; in other embodiments, the internal thread is disposed on the side wall of the second mounting hole 110, the second mounting hole 110 may not extend through two ends of the tool holder 100, when the tool bit 200 is mounted, one end of the shaft of the fastening bolt 310 extends through the first mounting hole 240 from one of the mounting planes 210, and is in threaded fit with the second mounting hole 110 of the tool holder 100, at this time, the head of the fastening bolt 310 and the end of the tool holder 100 face the tool bit 200 to be clamped and fixed, and the tool bit 200 and the tool holder 100 can be also detachably fixed; of course, in other embodiments, the side walls of the first mounting hole 240 and the second mounting hole 110 are internally threaded to provide a more secure fit of the tool tip 200 and the tool holder 100 with the fastening bolt 310.
In some embodiments of the present invention, as shown in fig. 2, a gasket 320 is sleeved on the fastening bolt 310, and the gasket 320 is used to increase the force-bearing area for fastening the fastening bolt 310, disperse the pressure, and avoid damaging the end surface of the first mounting hole 240 or the second mounting hole 110.
As shown in fig. 5, the arbor structure according to the second aspect of the embodiment of the present invention includes: the arbor body 400 and a plurality of cutter blades 510 disposed on the arbor body 400, the cutter blades 510 are configured as a crusher cutter according to the above-mentioned first aspect of the present invention.
Specifically, in the cutter with the arbor structure, two opposite mounting planes 210 of the cutter head 200 can be used for fixedly mounting with the cutter holder 100, the edge of the mounting plane 210 is provided with a cutting edge 220 for cutting, and the mounting plane 210 is further provided with a groove 230, so that the cutting edge 220 has a clearance angle a without affecting the cutting effect, therefore, after the cutting edge 220 of one of the mounting planes 210 is worn, the cutter head 200 can be turned over, the worn mounting plane 210 is used for assembling with the cutter holder 100, the cutting edge 220 on the non-worn mounting plane 210 can continue to cut until the cutting edges 220 of the two mounting planes 210 are worn, and it is necessary to replace the new cutter head 200. Therefore, the utilization rate of raw materials of the cutter head 200 is improved, the use cost of the cutter head 200 is reduced, the service cycle of a single cutter head 200 is prolonged, and the equipment shutdown time and the maintenance cost are reduced.
In some embodiments of the present invention, as shown in fig. 1 and 2, the tool holder 100 has a square cross section, and the side surface of the arbor body 400 is provided with a V-shaped groove adapted to the side surface of the tool holder 100. The cross section of the tool apron 100 is square, and has a side wall and an edge which are matched with the side wall of the V-shaped groove, so that the tool apron is convenient to be matched with the V-shaped groove, the tool grains 510 can be partially protruded out of the V-shaped groove, the tool head 200 can conveniently cut, and in practical application, the tool apron 100 can be fixed on the tool shaft body 400 in a welding mode and the like, so that the tool grains 510 can be fixed. Further, the side wall of the V-shaped groove may also be attached to the square tool bit 200, as shown in fig. 3, the tool bit 200 is provided with four straight chamfers, the straight chamfer at the lowermost end is attached to the side wall of the V-shaped groove, while the straight chamfer at the top forms the cutting edge 221 for cutting, and the straight chamfers at both sides are used for attaching to the straight chamfers of the adjacent tool bits 200. Set up like this, straight chamfer turns into the face structure with the line structure, can bear bigger impact force, reduces wearing and tearing, and then promotes cutting efficiency.
In some embodiments of the present invention, as shown in fig. 5, a plurality of cutter grains 510 are arranged along the axial direction of the arbor body 400 to form a row edge 500. The row blade 500 can increase the effective cutting width of the cutter shaft body 400, and can effectively cut and crush the object to be cut within the cutting width, thereby improving the cutting efficiency.
In some embodiments of the present invention, the row blade 500 is linear, wavy or zigzag, and the linear row blade 500 is convenient to arrange, so as to reduce the processing cost of the V-shaped groove on the cutter shaft; the wavy or zigzag row blade 500 can effectively exert the torque of the crushing blade 221, and can avoid jamming, thereby ensuring the continuity of the whole cutting process.
In some embodiments of the present invention, two adjacent blades 510 are attached to each other. Guarantee not have the clearance between two adjacent sword grain 510, the sword grain 510 of row sword 500 that forms helps the arbor to be even at the cutting force of cutting in-process, avoids appearing the condition that can not cut the material or material card between two adjacent sword grains 510, is favorable to accelerating cutting speed, and then promotes cutting efficiency.
According to a third aspect embodiment of the invention, a crusher comprises: the arbor structure according to the above-described second aspect of the present invention.
Specifically, the crusher is provided with an arbor structure, in a cutter on the arbor structure, two oppositely arranged mounting planes 210 of a cutter head 200 can be used for fixedly mounting with a cutter holder 100, the edge of the mounting plane 210 is provided with a cutting edge 220 which can be used for cutting, and the mounting plane 210 is further provided with a groove 230 which enables the cutting edge 220 to have a clearance angle a without affecting the cutting effect, so that after the cutting edge 220 of one mounting plane 210 is worn, the cutter head 200 can be turned over, the worn mounting plane 210 is used for assembling with the cutter holder 100, and the cutting edge 220 on the non-worn mounting plane 210 can continue to cut until the cutting edges 220 of the two mounting planes 210 are worn, and a new cutter head 200 is necessary to be replaced. Therefore, the utilization rate of raw materials of the cutter head 200 is improved, the use cost of the cutter head 200 is reduced, the service cycle of a single cutter head 200 is prolonged, and the equipment shutdown time and the maintenance cost are reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A crusher knife, comprising:
a tool holder (100);
tool bit (200), tool bit (200) are equipped with two mounting surface (210) that set up relatively, tool bit (200) can pass through mounting surface (210) with blade holder (100) can dismantle the connection, the edge of mounting surface (210) is equipped with a plurality of groups cutting edge (220), mounting surface (210) be equipped with recess (230) that cutting edge (220) correspond, the lateral wall of recess (230) with the lateral wall of tool bit (200) forms the contained angle.
2. A crusher tool according to claim 1, characterised in that,
the cutting edge (220) comprises a first edge (222), a second edge (223) and a cutting edge (221), the first edge (222) and the second edge (223) have an included angle, and the cutting edge (221) is arranged between the first edge (222) and the second edge (223).
3. A crusher tool according to claim 1, characterised in that,
still include fastening bolt (310), tool bit (200) are equipped with and run through two first mounting hole (240) of mounting plane (210), blade holder (100) are equipped with second mounting hole (110), first mounting hole (240) with second mounting hole (110) homoenergetic with fastening bolt (310) are inserted and are established the cooperation, the lateral wall of first mounting hole (240) and/or the lateral wall of second mounting hole (110) be equipped with fastening bolt (310) complex internal thread.
4. A crusher tool according to claim 3, characterised in that,
and a gasket (320) is sleeved on the fastening bolt (310).
5. An arbor structure, comprising:
a cutter shaft body (400) and a plurality of cutter bits (510) arranged on said cutter shaft body (400), said cutter bits (510) being arranged as a crusher cutter according to any one of claims 1 to 4.
6. An arbor structure as defined in claim 5,
the cross section of the tool apron (100) is square, and a V-shaped groove matched with the side surface of the tool apron (100) is formed in the side surface of the cutter shaft body (400).
7. An arbor structure as defined in claim 5,
the cutter grains (510) are arranged along the axial direction of the cutter shaft body (400) to form a row edge (500).
8. An arbor structure as defined in claim 7,
the row edge (500) is linear, wavy or zigzag.
9. An arbor structure as defined in claim 7,
two adjacent knife grains (510) are attached to each other.
10. A crusher, characterized by comprising:
an arbor structure as defined in any one of claims 5 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010504768.8A CN111686901A (en) | 2020-06-05 | 2020-06-05 | Breaker cutter and arbor structure and breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010504768.8A CN111686901A (en) | 2020-06-05 | 2020-06-05 | Breaker cutter and arbor structure and breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111686901A true CN111686901A (en) | 2020-09-22 |
Family
ID=72479527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010504768.8A Pending CN111686901A (en) | 2020-06-05 | 2020-06-05 | Breaker cutter and arbor structure and breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111686901A (en) |
-
2020
- 2020-06-05 CN CN202010504768.8A patent/CN111686901A/en active Pending
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