CN215234666U - Rotor subassembly and breaker - Google Patents

Abstract

The utility model belongs to the technical field of breaker technique and specifically relates to a rotor subassembly and breaker are related to. The rotor assembly comprises a rotor, an auxiliary mounting part, a fastener and a plate hammer, wherein the rotor is provided with a mounting groove, and the groove wall of one side of the mounting groove is provided with a first inclined surface; the auxiliary mounting piece is inserted in the mounting groove, and one side wall of the auxiliary mounting piece is in sliding fit with the first inclined surface; the local appearance of bar is located in the mounting groove, and a lateral wall of bar and the opposite side cell wall looks butt of mounting groove, another lateral wall of bar and the opposite side counterbalance of auxiliary mounting spare. The utility model provides a rotor subassembly adopts auxiliary mounting spare to support the board hammer to hold and be fixed in the mounting groove, and when needs dismantle the board hammer, the staff only need dismantle the fastener to slide auxiliary mounting spare along the first inclined plane of mounting groove, auxiliary mounting spare just separates with the board hammer, thereby can easily dismantle the board hammer from the mounting groove in, solved current breaker and had the technical problem that the board hammer dismantles the difficulty.

Description

Rotor subassembly and breaker

Technical Field

The utility model belongs to the technical field of breaker technique and specifically relates to a rotor subassembly and breaker are related to.

Background

A crusher is a crushing machine for crushing materials by impact, and is commonly used for crushing ores, coals, limes, and the like. The impact crusher is one kind of crusher, and its working principle is that the rotation of rotor makes stone collide with plate hammer, stone and impact plate at high speed to crush stone. The impact crusher is widely applied to material crushing treatment in various occasions such as mines, quarries, building garbage treatment and the like.

Referring to fig. 1, the conventional impact crusher includes a frame 1 and a rotor 14, a hook 2 with an anti-slip safety clip 3 is welded on the frame 1, an impact frame 9 is hung on the hook 2 through a hanging shaft 4, an impact lining plate 10 is inlaid on the impact frame 9, the impact frame 9 is pulled against the frame 1 through a hanging adjusting bolt 6, an adjusting nut 5 and a spring 8, a safety limit pin 7 is installed on the hanging adjusting bolt 6, and a plate hammer 13 is installed on the outer edge of the rotor 14. The spring 8 exerts a pressing force on the reaction frame 9. Wherein, rotor 14 has the mounting groove of installation board hammer 13, and the both sides of board hammer 13 have protruding 12, and supplementary installation piece 11 has been placed respectively to the both sides of board hammer 13, supplementary installation piece 11 have with protruding 12 complex recess, the common centre gripping fixed board hammer 13 of both sides supplementary installation piece 11, still need special fixed knot to construct with the supplementary installation piece 11 of both sides fixed simultaneously, just realize the fixed mounting of board hammer 13. When the plate hammer 13 needs to be replaced, a worker needs to remove the special fixing structure and then pull the auxiliary mounting block 11 from the side of the rotor 14, so that the plate hammer 13 can be removed.

Therefore, the existing crusher has the technical problem that the plate hammer is difficult to disassemble.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rotor subassembly and breaker aims at solving current breaker and has the technical problem that the difficulty was dismantled to the board hammer.

In order to achieve the above object, the utility model adopts the following technical scheme: providing a rotor assembly comprising:

the rotor is provided with a mounting groove, and the groove wall of one side of the mounting groove is provided with a first inclined surface;

the auxiliary mounting piece is inserted in the mounting groove, and one side wall of the auxiliary mounting piece is in sliding fit with the first inclined surface;

the part of the plate hammer is accommodated in the mounting groove, one side wall of the plate hammer is abutted with the other side wall of the mounting groove, and the other side wall of the plate hammer is abutted with the other side of the auxiliary mounting part; and

and the fastener is used for detachably pushing the auxiliary mounting piece so as to clamp the plate hammer between the other side wall of the auxiliary mounting piece and the other side groove wall of the mounting groove.

In one embodiment, the auxiliary mounting part is provided with a connecting hole which is penetrated from top to bottom, the fastener comprises a fastening bolt and a fastening nut, the fastening bolt is inserted into the connecting hole from top to bottom, the fastening nut is in threaded connection with the fastening bolt, and the fastening nut abuts against the lower surface of the auxiliary mounting part.

In one embodiment, the rotor assembly further includes two limiting members installed on the rotor, and the two limiting members are respectively located at two sides of the auxiliary installation member to limit the auxiliary installation member from sliding along the depth direction of the installation groove.

In one embodiment, the rotor includes a rotating shaft and a plurality of board mounting portions, the board mounting portions are mounted to the rotating shaft at intervals along an axial direction of the rotating shaft, and the board mounting portions have the mounting grooves.

In one embodiment, the rotor assembly further comprises a support plate installed between the plate hammer and the other side groove wall of the installation groove, and the support plate extends from one end of the rotating shaft to the other end of the rotating shaft along the axial direction of the rotating shaft.

In one embodiment, one of the support plate and the plate hammer has a clamping block, and the other of the support plate and the plate hammer has a clamping groove which is matched with the clamping block.

In one embodiment, the number of plate hammers is between 4 and 8.

In one embodiment, the end of the plate hammer is provided with a sling.

In one embodiment, the hoisting part is a threaded hole or a hoisting ring.

The application also provides a crusher, which comprises a casing, an impact frame, an impact plate and the rotor assembly, wherein the casing is provided with a crushing cavity, a feeding port and a discharging port, and the feeding port and the discharging port are respectively communicated with the crushing cavity; the rotor assembly is rotatably arranged in the crushing cavity, the impact frame is arranged on the inner wall of the shell, the impact plate is arranged on the impact frame and located on one side, close to the rotor assembly, of the impact frame, and a gap is formed between the impact plate and the rotor assembly.

The utility model provides a rotor subassembly and breaker's beneficial effect is: adopt in the auxiliary mounting spare supports to hold the board hammer and is fixed in the mounting groove, when needs dismantle the board hammer, the staff only need dismantle the fastener to slide the auxiliary mounting spare along the first inclined plane of mounting groove, the auxiliary mounting spare just separates with the board hammer, thereby can easily dismantle the board hammer from the mounting groove in, has solved current breaker and has had the technical problem that the board hammer dismantles the difficulty, is favorable to the staff to dismantle the board hammer laborsavingly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

FIG. 1 is a schematic view of a crusher of the prior art;

fig. 2 is a schematic structural diagram of a crusher according to an embodiment of the present invention;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is an enlarged view of FIG. 5 at A;

FIG. 7 is a schematic view of the auxiliary mount of FIG. 6;

fig. 8 is a schematic structural view of a rotor assembly in another embodiment.

Wherein, in the figures, the respective reference numerals:

1-a frame, 2-a hook, 3-an anti-slip safety clamp, 4-a hanging shaft, 5-an adjusting nut, 6-a hanging adjusting bolt, 7-a safety limit pin, 8-a spring, 9-a counterattack frame, 10-a counterattack lining plate, 11-an auxiliary mounting block, 12-a bulge, 13-a hammer and 14-a rotor;

100-rotor component, 110-rotor, 111-mounting groove, 112-first inclined surface, 113-rotating shaft, 114-plate mounting part, 120-auxiliary mounting part, 121-second inclined surface, 122-connecting hole, 130-fastener, 131-fastening bolt, 132-fastening nut, 140-hammer, 141-clamping block, 142-hoisting part, 143-crushed material end, 144-material receiving plane, 150-limiting part, 160-supporting plate and 161-clamping groove;

200-housing, 210-crushing chamber, 220-feed inlet, 230-discharge outlet, 240-adjusting device, 241-adjusting rod, 250-access door;

300-a counterattack frame;

400-counterattack board;

500-motor.

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 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 drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, in the prior art, the step of disassembling the plate hammer 13 by the worker includes: firstly, a special fixing structure for fixing the auxiliary mounting block 11 needs to be disassembled, secondly, the auxiliary mounting block 11 cannot be slid in a labor-saving manner due to the mutual embedding of the auxiliary mounting block 11 and the plate hammer 13, and only the auxiliary mounting block 11 can be taken out from the side edge of the rotor 14 in a labor-saving manner, and thirdly, the plate hammer 13 is manually carried off by a worker.

Referring to fig. 2 to 5, the present embodiment provides a crusher including a rotor assembly 100, a casing 200, an impact frame 300 and an impact plate 400, wherein the casing 200 has a crushing chamber 210, a feeding port 220 and a discharging port 230, and the feeding port 220 and the discharging port 230 are respectively communicated with the crushing chamber 210. Rotor assembly 100 is rotatably mounted in crushing chamber 210, impact plate 400 is mounted on impact plate 300 and located on the side of impact plate 300 close to rotor assembly 100, and impact plate 400 and rotor assembly 100 are spaced from each other.

Referring to fig. 5 and 6, the rotor assembly 100 includes a rotor 110, an auxiliary mount 120, a fastener 130, and a plate hammer 140. The rotor 110 has a mounting groove 111, and a groove wall of one side of the mounting groove 111 has a first inclined surface 112. The auxiliary mounting member 120 is inserted into the mounting groove 111, and a side wall of the auxiliary mounting member 120 is slidably engaged with the first inclined surface 112. A part of the plate hammer 140 is accommodated in the mounting groove 111, one side wall of the plate hammer 140 abuts against the other side wall of the mounting groove 111, and the other side wall of the plate hammer 140 abuts against the other side of the auxiliary mounting member 120. The fastener 130 detachably pushes the auxiliary mount 120 to clamp the plate hammer 140 between the other side wall of the auxiliary mount 120 and the other side groove wall of the mounting groove 111.

The utility model provides a rotor subassembly 100 adopts auxiliary mounting part 120 to support holding plate hammer 140 and be fixed in mounting groove 111 in, when needs dismantle plate hammer 140, the staff only need dismantle fastener 130, and slide auxiliary mounting part 120 along the first inclined plane 112 of mounting groove 111 laborsavingly, auxiliary mounting part 120 just separates with plate hammer 140, thereby can easily dismantle plate hammer 140 from mounting groove 111 gets off, the technical problem that current breaker exists plate hammer 140 and dismantles the difficulty has been solved.

Here, assuming that the first inclined surface 112 is inclined gradually in a direction from the outside of the rotor 110 to the center of the rotor 110 (as shown in fig. 6), the auxiliary attachment 120 slides along the first inclined surface 112 in a direction from the outside of the rotor 110 to the center of the rotor 110, the auxiliary attachment 120 is gradually separated from the plate hammer 140, and the auxiliary attachment 120 releases the abutting fixing restriction of the plate hammer 140.

Similarly, assuming that the first inclined surface 112 is inclined gradually in the direction from the center of the rotor 110 to the outside of the rotor 110, the auxiliary attachment 120 slides along the first inclined surface 112 in the direction from the center of the rotor 110 to the outside of the rotor 110, the auxiliary attachment 120 is gradually separated from the plate hammer 140, and the auxiliary attachment 120 releases the holding and fixing restriction of the plate hammer 140.

In this embodiment, one side of the auxiliary mounting member 120 is slidably engaged with the first inclined surface 112 in many ways. For example, the auxiliary mounting member 120 may be in point, line, or surface contact with the first inclined surface 112 to slide along the first inclined surface 112. For another example, the auxiliary mounting member 120 has a roller or a slider, and the auxiliary mounting member 120 is slidably engaged with the first inclined surface 112 through the roller or the slider.

With reference to fig. 6 and 7, the auxiliary fitting member 120 has a second inclined surface 121 slidably fitted with the first inclined surface 112.

In this embodiment, the abutment of the plate hammer 140 with the auxiliary attachment 120 means that the plate hammer 140 and the auxiliary attachment 120 are in point contact, line contact, or surface contact, and there is no connection relationship such as snap, adhesion, or fastening, so that the plate hammer 140 and the auxiliary attachment 120 can be easily separated.

In this embodiment, the contact between the plate hammer 140 and the groove wall of the mounting groove 111 means that the plate hammer 140 contacts the groove wall of the mounting groove 111, or the plate hammer 140 is detachably connected to the groove wall of the mounting groove 111.

The utility model provides a breaker during operation, rotor subassembly 100 is high-speed rotatory, and the material gets into broken chamber 210 from feed inlet 220 to clearance along between counterattack board 400 and the rotor subassembly 100 is removed towards bin outlet 230 direction. During the moving process, the materials are firstly crushed by the impact of the plate hammer 140, then thrown onto the impact plate 400 for crushing again, then rebounded from the impact plate 400 to the plate hammer 140 for crushing again, and simultaneously, the materials and the materials are crushed by mutual impact, and the process is repeated until the materials are crushed to the required granularity and finally discharged from the discharge port 230.

The utility model provides a crusher has this rotor subassembly 100, and the staff of being convenient for easily dismantles the board hammer 140.

In one embodiment, referring to fig. 6 and 7, the auxiliary mounting member 120 has a connecting hole 122 penetrating from top to bottom, the fastening member 130 includes a fastening bolt 131 and a fastening nut 132, the fastening bolt 131 is inserted into the connecting hole 122 from top to bottom, the fastening nut 132 is screwed to the fastening bolt 131, and the fastening nut 132 abuts against a lower surface of the auxiliary mounting member 120, so that the fastening member 130 clamps and fixes the auxiliary mounting member 120. When the worker unscrews the fastening nut 132, the auxiliary mount 120 can slide along the fastening bolt 131, that is, the fastener 130 releases the fixing restriction of the auxiliary mount 120.

In the present embodiment, "up" refers to the outside of the rotor 110, "down" refers to the center of the rotor 110, "top-down" refers to the direction from the outside of the rotor 110 to the center of the rotor 110, and the lower surface of the auxiliary mount 120 refers to the surface of the auxiliary mount 120 near the center of the rotor 110.

The connection hole 122 is a countersunk hole, so that the fastening bolt 131 is not exposed to the top of the auxiliary mounting member 120.

In one embodiment, referring to fig. 5 and 6, the rotor assembly 100 further includes two limiting members 150 mounted on the rotor 110, and the two limiting members 150 are respectively located at two sides of the auxiliary mounting member 120 to limit the auxiliary mounting member 120 to slide along the depth direction of the mounting groove 111, so that the auxiliary mounting member 120 and the plate hammer 140 are stably and firmly mounted in the mounting groove 111 in the operating state during the rotation of the rotor assembly 100. When the worker needs to detach the plate hammer 140, the auxiliary mounting member 120 slides along the first inclined surface 112, and after the auxiliary mounting member 120 slides for a certain distance, the two limiting members 150 are located above or below the auxiliary mounting member 120, so that the limitation on the auxiliary mounting member 120 is removed.

Specifically, the limiting member 150 is fixedly connected to the rotor 110, for example, welded to the rotor 110.

Specifically, the limiting member 150 is a limiting plate or a limiting block.

In one embodiment, referring to fig. 8, the rotor 110 includes a rotating shaft 113 and a plurality of board mounting portions 114, the plurality of board mounting portions 114 are mounted on the rotating shaft 113 at intervals along an axial direction of the rotating shaft 113, and the board mounting portions 114 have mounting grooves 111.

Wherein, pivot 113 is connected with outside driving piece, for example motor 500 to pivot 113 can rotate, and then drives the rotation of bar 140, realizes carrying out broken processing to the material.

In one embodiment, referring to fig. 5 and 6, the rotor assembly 100 further includes a support plate 160, the support plate 160 is installed between the hammer 140 and the other side groove wall of the installation groove 111, and the support plate 160 extends from one end of the rotating shaft 113 to the other end of the rotating shaft 113 along the axial direction of the rotating shaft 113. Because the plurality of plate mounting portions 114 are spaced from each other, the contact area between the plate mounting portions 114 and the plate hammer 140 is limited, and the support plate 160 is introduced, the contact area between the plate hammer 140 and the support plate 160 can be increased, so that the connection of the plate hammer 140 is more stable, and the transmission of torque is facilitated.

In one embodiment, referring to fig. 5 and 6, one of the support plate 160 and the plate hammer 140 has a clamp block 141, and the other of the support plate 160 and the plate hammer 140 has a clamp groove 161 that mates with the clamp block 141. The clamping blocks 141 and the clamping grooves 161 are arranged, so that the supporting plate 160 and the plate hammer 140 can be prevented from sliding, and the position of the plate hammer 140 is stable and firm.

In one embodiment, the number of plate hammers 140 is between 4 and 8.

Alternatively, the number of plate hammers 140 is 4 (see fig. 8), 6 (see fig. 5), or 8.

In one embodiment, referring to fig. 5 and 6, the end of the board hammer 140 has a sling 142. The lifting part 142 is provided to facilitate a worker to lift the board hammer 140 by a lifting tool, such as a boom, a crane, etc., instead of manually carrying the board hammer 140 when the worker removes or installs the board hammer 140.

Specifically, the hoisting part 142 is a threaded hole or a hoisting ring. When the hoisting part 142 is a threaded hole, the hoisting tool is screwed into the threaded hole through a bolt, so that the hoisting tool is fixedly connected with the plate hammer 140 and is convenient to hoist.

In one embodiment, the plate hammer 140 has a scrap end 143 exposed to the rotor 110, and the scrap end 143 has an inclined material facing surface 144. The material facing plane 144 herein refers to the side of the spit end 143 that is first encountered in the direction of rotation of the rotor assembly 100. For example, as shown in fig. 6, when the rotor assembly 100 rotates counterclockwise, the right side of the spit end 143 is the material facing plane 144.

The inventor finds out through multiple experiments that the material enters the crushing cavity 210 from the feeding port 220 and is crushed by the first impact of the material feeding end 143, and 60% of the final output product is formed, so that the first impact mass of the material and the material feeding end 143 is related to the mass of 60% of the product and the next impact effect of the whole product.

The top surface of garrulous material end 143 is the plane, meet the slope of material plane 144 and set up, the material falls into broken chamber 210 back from feed inlet 220, the top surface of garrulous material end 143 can be strikeed to the material that drops with roughly the vertical direction, the material that drops with the parabola trace can strike meeting material plane 144, most material all strikes on bar 140 promptly, rather than striking on rotor 110, and the striking position is the plane, rather than sharp-pointed edge, thereby the material is through striking the back, produce the cube crushed aggregates that the shape is comparatively regular more easily, reduce the content of needle slice material, the quality of product is high.

Specifically, referring to fig. 5 and 6, the included angle between the material receiving plane 144 and the vertical plane is between 100 ° and 120 °.

The inventor obtains through experiments many times that the collision angle is more nearly perpendicular when the material is impacted broken, more easily produces the more regular cube crushed aggregates of shape, reduces the content of needle slice material to improve the breaker yield, improve the quality of product.

Meanwhile, the inventor finds that the included angle between the track of the material before the first impact and the vertical direction is in the range of 0-30 degrees through multiple experiments. Thus, the included angle between the material receiving plane 144 and the vertical plane is 100-120 degrees, the material basically impacts the crushed material end 143 and impacts the crushed material end 143 at a basically vertical angle, and accordingly more crushed cubic materials are obtained through crushing, and the quality is high.

The rotor assembly 100 provided in this embodiment may be applied to other types of crushers, such as a vertical shaft type multistage plate hammer mill, in addition to the crusher.

In one embodiment, please refer to fig. 4 and 5, the crusher further includes an adjusting device 240 installed on the casing 200, the adjusting device 240 has an adjusting rod 241 with an adjustable position, one end of the impact frame 300 is rotatably connected to the inner wall of the casing 200, and the other end of the impact frame 300 is connected to the adjusting rod 241. The position of the adjusting rod 241 is changed to drive the impact frame 300 and the impact plate 400 to move, so as to adjust the gap between the impact plate 400 and the rotor assembly 100 and control the particle size of discharged materials.

Wherein the size of the gap between the impact plate 400 and the rotor assembly 100 is related to the particle size of the discharged material. If the distance between the impact plate 400 and the rotor assembly 100 is large, the discharging granularity of the crusher is large; if the spacing between the impact plate 400 and the rotor assembly 100 is small, the crusher's discharge particle size is small.

The position of the adjusting rod 241 can be adjusted in many ways. For example, the worker may adjust the installation position of the adjustment rod 241, thereby changing the protrusion length of the adjustment rod 241 into the crushing chamber 210. For another example, the adjusting device 240 further has a nut threadedly coupled to the adjusting rod 241, and the operator changes the extending length of the adjusting rod 241 into the crushing chamber 210 by rotating the nut.

Specifically, referring to fig. 4, cabinet 200 has an access door 250 that is openable and closable, and access door 250 faces the middle of counterattack rack 300 to facilitate maintenance of counterattack rack 300 by a worker.

Specifically, referring to fig. 3, the crusher further includes a motor 500, the motor 500 is connected to the rotor assembly 100, and the motor 500 is used for driving the rotor assembly 100 to rotate.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A rotor assembly, characterized by: the method comprises the following steps:

the rotor is provided with a mounting groove, and the groove wall of one side of the mounting groove is provided with a first inclined surface;

the auxiliary mounting piece is inserted in the mounting groove, and one side wall of the auxiliary mounting piece is in sliding fit with the first inclined surface;

the part of the plate hammer is accommodated in the mounting groove, one side wall of the plate hammer is abutted against the other side wall of the mounting groove, and the other side wall of the plate hammer is abutted against the other side wall of the auxiliary mounting part; and

and the fastener is used for detachably pushing the auxiliary mounting piece so as to clamp the plate hammer between the other side wall of the auxiliary mounting piece and the other side groove wall of the mounting groove.

2. The rotor assembly of claim 1, wherein: the auxiliary mounting piece is provided with a connecting hole which is penetrated from top to bottom, the fastening piece comprises a fastening bolt and a fastening nut, the fastening bolt is inserted into the connecting hole from top to bottom, the fastening nut is in threaded connection with the fastening bolt, and the fastening nut abuts against the lower surface of the auxiliary mounting piece.

3. The rotor assembly of claim 1, wherein: the rotor assembly further comprises two limiting parts arranged on the rotor, and the two limiting parts are respectively located on two sides of the auxiliary mounting part to limit the auxiliary mounting part to slide along the depth direction of the mounting groove.

4. The rotor assembly of claim 1, wherein: the rotor includes pivot and a plurality of board installation department, and is a plurality of the board installation department is followed the axis direction interval of pivot install in the pivot, the board installation department has the mounting groove.

5. The rotor assembly of claim 4, wherein: the rotor subassembly still includes the backup pad, the backup pad install in the board hammer with between the opposite side cell wall of mounting groove, the backup pad is followed the axial of pivot is followed the one end of pivot extends to the other end of pivot.

6. The rotor assembly of claim 5, wherein: one of the supporting plate and the plate hammer is provided with a clamping block, and the other of the supporting plate and the plate hammer is provided with a clamping groove matched with the clamping block.

7. The rotor assembly of claim 1, wherein: the number of the plate hammers is between 4 and 8.

8. The rotor assembly of any one of claims 1 to 7, wherein: the end of the plate hammer is provided with a hoisting part.

9. The rotor assembly of claim 8, wherein: the hoisting part is a threaded hole or a hoisting ring.

10. A crusher, characterized by: comprising a housing, a reaction frame, a reaction plate and a rotor assembly as claimed in any one of claims 1 to 9, the housing having a crushing chamber, a feed opening and a discharge opening, the feed opening and the discharge opening being in communication with the crushing chamber, respectively; the rotor assembly is rotatably arranged in the crushing cavity, the impact frame is arranged on the inner wall of the shell, the impact plate is arranged on the impact frame and located on one side, close to the rotor assembly, of the impact frame, and a gap is formed between the impact plate and the rotor assembly.

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