CN214390532U - Throwing head device of impact crusher, rotor and impact crusher - Google Patents

Abstract

The utility model discloses a throwing head device of an impact crusher, a rotor and the impact crusher, wherein the throwing head device comprises a matrix and a plurality of throwing blocks, and the matrix comprises a first mounting surface and a second mounting surface which are opposite; the material throwing blocks are fixedly connected to the first mounting surface, the outer surface of each material throwing block forms a material throwing surface, and the material throwing surface covers the first mounting surface; the second mounting surface is provided with a fixing structure for fixedly mounting the matrix on a rotor of the impact crusher; the mother body is formed by laminating a plurality of mother body substrates. According to the material throwing head device, the matrix in the material throwing head device is formed by laminating and fixing the plurality of matrix substrates, and the matrix substrate with the plate-shaped structure is provided with the groove or the boss, so that compared with the method of arranging the groove or the boss on the single complete matrix, the technical process is simpler, and the cost can be effectively saved.

Description

Throwing head device of impact crusher, rotor and impact crusher

Technical Field

The utility model relates to a breaker technical field specifically is a throwing stub bar device, rotor and impact crusher of impact crusher.

Background

The most widely used impact crusher in the fields of current building material processing, nonferrous metal mine mineral separation and nonmetal processing is a sand making device for 'stone breaking and iron' or 'stone breaking'. The material throwing head device is a key part of the impact crusher and is a wearing part which needs to be replaced frequently. The impact crusher adopts the principle that materials entering the center of a rotor are accelerated by thrust and impact a throwing head under the action of centrifugal force through the rotor rotating at a high speed, and the materials are splashed out to impact a guard plate or a material waterfall flow on the circumference of a crushing cavity so as to achieve the purpose of crushing.

However, the material throwing head of each type of impact crusher is unreasonable in structure, so that the problems that a bolt for fixing the material throwing head is easy to loosen and fall off, the tail part is easy to break and the like occur in the using process, mechanical faults are easy to cause, and production is influenced. For example, the throwing material head device shown in fig. 1 comprises a head part 001 and a tail part 002, wherein the tail part 002 of the throwing material head is provided with a hole, the throwing material head is fixed on a support beside a rotor material shooting port by a bolt, but because a fastening bolt of the throwing material head device is exposed, the bolt is easily damaged, deformed and abraded by the impact of materials outside, the problem of high difficulty in disassembly and assembly is caused, and the use cost is increased. For example, the material throwing head device shown in fig. 2 comprises a base 003, an outer material throwing head 004 and an inner material throwing head 005, and although the problem of bolt exposure is avoided, the integral casting part adopted by the parent parts of the outer material throwing head 004 and the inner material throwing head 005 is provided with a groove or a boss on the parent body in the form of the integral casting part, and the groove or the boss needs to be cut by a machine tool, so that the problems of high manufacturing cost, long period and the like of the material throwing head device are caused.

SUMMERY OF THE UTILITY MODEL

To the exposed, parent preparation cycle length and with high costs problem of fastening bolt among the material head device of throwing that exists among the above-mentioned prior art, the utility model provides an impact crusher throw material head device, rotor and impact crusher, it forms the parent of throwing the material head device through adopting a plurality of parent base plate range upon range of, and sets up recess or boss on platelike structure's parent base plate, compares in offering recess or boss on solitary complete parent, and its process will be simpler, can effectual saving cost.

In order to achieve the purpose, the utility model provides a material throwing head device of an impact crusher, which comprises a parent body and a plurality of material throwing blocks, wherein the parent body comprises a first mounting surface and a second mounting surface which are opposite; the material throwing blocks are fixedly connected to the first mounting surface, the outer surface of each material throwing block forms a material throwing surface, and the material throwing surface covers the first mounting surface; the second mounting surface is provided with a fixing structure for fixedly mounting the matrix on a rotor of the impact crusher; the mother body is formed by laminating and fixing a plurality of mother body substrates.

In one embodiment, the throwing blocks are fixedly connected to the first mounting surface in a concave-convex insertion mode.

In one embodiment, the inner surface of the throwing block is provided with a boss, the first mounting surface is provided with a groove corresponding to the boss, and the boss and the groove are correspondingly and fixedly matched to form a concave-convex insertion connection.

In one embodiment, the inner surface of the throwing block is provided with a groove, the first mounting surface is provided with a boss corresponding to the groove, and the groove and the boss are correspondingly and fixedly matched to form a concave-convex insertion connection.

In one embodiment, the fixing structure includes fixing holes disposed on two end faces of the parent body, and the fixing holes are through holes or counter bores.

In one embodiment, the fixing structure further comprises a fixing groove or a fixing boss arranged on the second mounting surface.

In one embodiment, the thrower block is made of a wear-resistant alloy material.

In order to achieve the above object, the utility model also provides an impact crusher's rotor, include first disc, second disc and fix between first disc and the second disc and in a plurality of equipartitions on the circumference throw stub bar device with throw the stub bar device outward, interior throw stub bar device with throw the stub bar device of at least one in the stub bar device outward for foretell impact crusher.

In order to achieve the above object, the utility model also provides an impact crusher, including drive arrangement, broken chamber and foretell impact crusher's rotor, impact crusher's rotor is connected in broken chamber and is linked to each other with the drive arrangement transmission through the pivot.

In one embodiment, the impact crusher is a horizontal shaft impact crusher, the crushing cavity comprises a first upper crushing cavity, a second upper crushing cavity and a lower crushing cavity, the first upper crushing cavity and the second upper crushing cavity are respectively hinged at an upper opening of the lower crushing cavity, and the crushing cavity is formed by combining the first upper crushing cavity, the second upper crushing cavity and the lower crushing cavity together.

In one embodiment, the crushing device further comprises a first oil cylinder and a second oil cylinder which are arranged outside the crushing cavity, wherein one end of the first oil cylinder is hinged with the first upper crushing cavity, and the other end of the first oil cylinder is hinged with the lower crushing cavity; one end of the second oil cylinder is hinged with the second upper crushing cavity, and the other end of the second oil cylinder is hinged with the lower crushing cavity; when the first oil cylinder and the second oil cylinder extend, the first upper crushing cavity and the second upper crushing cavity are supported, the crushing cavity is opened, when the first oil cylinder and the second oil cylinder shorten, the first upper crushing cavity and the second upper crushing cavity descend, and the crushing cavity is closed.

The utility model provides a pair of impact crusher's throwing stub bar device, rotor and impact crusher, wherein throw the stub bar device and compare in prior art and have following beneficial effect:

1. the material throwing head device of the utility model forms the material throwing head by a plurality of material throwing blocks, forms the material throwing surface by the outer surfaces of all the material throwing blocks, and covers the first mounting surface by the material throwing surface, thereby effectively avoiding the damage of the matrix due to the impact force of the material and prolonging the service life of the material throwing head device;

2. the utility model discloses an adopt a plurality of parent base plate range upon range of and form the parent in the stub bar device of throwing, and set up recess or boss on platelike structure's parent base plate, compare in setting up recess or boss on solitary complete parent, its course of technology will be simpler, can effectual saving cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a first embodiment of a material throwing head device of the prior art;

FIG. 2 is a second embodiment of a material throwing head apparatus of the prior art;

fig. 3 is a front axial view of a material throwing head device in the first embodiment of the present invention;

FIG. 4 is a perspective view of a mother body according to a first embodiment of the present invention;

FIG. 5 is an isometric view of a throwing block according to a first embodiment of the present invention;

fig. 6 is a schematic structural view of a mother substrate according to a first embodiment of the present invention;

fig. 7 is a schematic structural view of a first embodiment of a fixing structure according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a second embodiment of a fixing structure according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a third embodiment of a fixing structure according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a fourth embodiment of a fixing structure according to an embodiment of the present invention;

fig. 11 is an isometric view of a rotor according to a second embodiment of the present invention;

fig. 12 is a side view of a rotor according to a second embodiment of the present invention;

fig. 13 is an isometric view of an impact crusher in a third embodiment of the present invention;

fig. 14 is a front view of an impact crusher according to a third embodiment of the present invention.

Reference numerals: the material throwing device comprises a head 001, a tail 002, a base 003, an outer throwing head 004, an inner throwing head 005, a mother body 101, a throwing block 102, a first mounting surface 103, a second mounting surface 104, a mother body base plate 105, a boss 106, a groove 107, a small groove 108, a fixing groove 109, a fixing piece 1010, a fixing hole 1011, a resisting piece 1012 and a fixing boss 1013; the device comprises a first disc 201, a second disc 202, a throwing head device 203, a throwing head mounting base 204 and a fastening bolt 205; a first upper crushing chamber 301, a second upper crushing chamber 302, a lower crushing chamber 303, a first oil cylinder 304, a second oil cylinder 305.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Example one

Referring to fig. 3-6, the material throwing head device of an impact crusher disclosed in this embodiment includes a mother body 101 and a plurality of material throwing blocks 102, the mother body 101 includes a first mounting surface 103 and a second mounting surface 104 opposite to each other; the polishing blocks 102 are fixedly connected to the first mounting surface 103 in a concave-convex insertion mode, the outer surface of each polishing block 102 forms a polishing surface, and the polishing surface covers the first mounting surface 103; the second mounting surface 104 is provided with a fixing structure for fixedly mounting the matrix 101 on a rotor of the impact crusher; the mother substrate 101 is formed by stacking and fixing a plurality of mother substrates 105. The throwing block 102 and the first mounting surface 103 are further fixedly connected by soldering, gluing or the like on the basis of concave-convex insertion, and the mother substrates 105 can be stacked and fixed by riveting or the like.

In the embodiment, the plurality of throwing blocks 102 form the throwing head together, the outer surfaces of all the throwing blocks 102 form the throwing surface, and the throwing surface covers the first mounting surface 103, so that the matrix 101 can be effectively prevented from being damaged due to the impact force of the materials, and the service life of the throwing head device is prolonged.

In this embodiment, the connection manner of the concave-convex insertion between the throwing block 102 and the mother body 101 has two implementation structures:

the first implementation structure is that the inner surface of the polishing block 102 is provided with a boss 106, the first mounting surface 103 is provided with a groove 107 corresponding to the boss 106, and the boss 106 and the groove 107 are correspondingly and fixedly matched to form a concave-convex insertion connection, as shown in fig. 3-6, wherein the fixed matching between the boss 106 and the groove 107 is realized by soldering or gluing. It should be noted that, when the mother substrate 105 is prepared by cutting or stamping a plate, a plurality of small grooves 108 are directly stamped or cut at corresponding positions of the mother substrate 105, after the plurality of mother substrates 105 are stacked to form the mother body 101, all the small grooves 108 form at least one strip-shaped groove 107, a plurality of throwing blocks 102 are inserted into each groove 107 along the length direction of the groove 107, two adjacent throwing blocks 102 in the same groove 107 are tightly attached to each other, and two adjacent throwing blocks 102 in different grooves 107 are also tightly attached to each other.

The second implementation structure is that the inner surface of the material throwing block is provided with a groove, the first installation surface is provided with a boss corresponding to the groove, the groove and the boss are correspondingly and fixedly matched to form concave-convex insertion connection, the implementation structure is not shown in the figure, and the fixed matching between the groove and the boss is realized through brazing or gluing and the like. It should be noted that when a mother substrate is prepared by cutting or punching a plate, a plurality of small protrusions are directly punched or cut at corresponding positions of the mother substrate, after the plurality of mother substrates are stacked to form a mother body, all the small protrusions form at least one strip-shaped boss, a plurality of material throwing blocks are inserted into each boss along the length direction of the boss, two adjacent material throwing blocks on the same boss are tightly attached to each other, and two adjacent material throwing blocks on different bosses are also tightly attached to each other.

In the two embodiments of the concave-convex insertion connection between the throwing block 102 and the matrix 101, the cross-sectional structures of the groove and the boss are quadrilateral, triangular, circular, elliptical, polygonal or irregular structures, preferably trapezoidal structures in the quadrilateral.

In the embodiment, the mother body 101 and the throwing block 102 are connected in a concave-convex inserting manner, so that on one hand, the capability of the throwing block 102 for bearing strong impact force is improved, and the phenomenon that a connector between the throwing block 102 and the mother body 101 is broken is avoided; on the other hand, any connecting part exposed outside is not required to be arranged between the material throwing block 102 and the matrix 101, so that the phenomenon that a fastening bolt in the traditional scheme is damaged due to material impact is effectively avoided, in addition, the matrix 101 is formed by riveting and welding a plurality of matrix substrates 105, grooves or bosses are formed in the matrix substrates 105 in the plate-shaped structure, compared with the grooves or bosses formed in the single complete matrix 101, the technical process is simpler, and the cost can be effectively saved.

In this embodiment, the fixing structure includes fixing holes provided at two end faces of the mother body 101, and the fixing holes are through holes or counter bores; and a fixing groove or a fixing boss arranged on the second mounting surface. In the installation process of the throwing head device, the throwing head device is firstly installed on the throwing head installation seat 204 in a concave-convex insertion mode through a fixed groove or a fixed boss, so that the throwing head device is positioned; and then the fastening of the throwing head device is realized through the matching between the fastening bolt and the counter bore or the through hole on the end surface of the parent body 101.

The fixing structure in this embodiment has four implementation structures:

as shown in fig. 7, in the first implementation structure, the fixing structure includes two fixing pieces 1010 and a fixing groove 109, the fixing groove 109 is disposed on the second mounting surface 104 and penetrates through two end surfaces of the mother substrate 101 along the stacking direction of the mother substrate 105, the number of the fixing pieces 1010 is two, the two fixing pieces 1010 are disposed at two ends of the fixing groove 109, a fixing hole 1011 is defined between the fixing piece 1010 and a groove wall of the fixing groove 109, and the fixing hole 1011 can be matched with the mounting structure of the throwing head mounting base 204 through the fixing groove 109 and the fixing hole 1011, so as to complete the fixed mounting of the throwing head device. The fixing element 1010 and the fixing groove 109 can be connected in a welded mode, the section structure of the fixing groove 109 is a rectangular, semicircular or semi-elliptical structure, a plurality of small fixing grooves can be formed in the corresponding positions of the mother substrate by directly punching or cutting when the mother substrate is prepared by cutting or punching the plate, and after the mother substrate is formed by stacking the mother substrates, all the small fixing grooves form the fixing groove 109. Further, the fixing structure under the implementation structure further comprises abutting pieces 1012 which correspond to the fixing pieces 1010 one by one, the abutting pieces 1012 are arranged in the fixing groove 109 and are welded with the fixing pieces 1010 in an assembling mode, the tail ends of the fixing holes 1011 are sealed to form counter bores, the fixing holes 1011 are arranged to be counter bore structures, and therefore axial movement of the material throwing head device on the material throwing head mounting seat 204 can be effectively avoided. The fastening member 1012 and the fixing groove 109 may be connected by welding.

A second implementation structure is shown in fig. 8, in this implementation structure, the fixing structure includes a plurality of fixing grooves 109 and two fixing pieces 1010, the fixing grooves 109 are spaced apart from each other in the stacking direction of the mother substrate 105 on the second mounting surface 104 (two fixing grooves 109 are shown in fig. 8), the number of the fixing pieces 1010 is two, the two fixing pieces 1010 are distributed at two ends of the second mounting surface 104 and form fixing holes 1011 in the form of counter bores with the groove walls of the mounting grooves at two ends of the second mounting surface 104, and then the fixing grooves 109 and the fixing holes 1011 can be matched with the mounting structure of the material throwing head mounting base 204 to complete the fixed mounting of the material throwing head device. The fixing piece 1010 and the mounting groove can be connected in a welded mode, the section structure of the fixing groove 109 is a rectangular or semicircular or semi-elliptical structure, the fixing groove and the mounting groove can be directly punched or cut at the corresponding position of the corresponding parent substrate to form a plurality of small fixing grooves and small mounting grooves when the parent substrate is cut or punched to prepare the parent substrate, and after the parent substrate is formed by stacking the parent substrates, all the small fixing grooves and the small mounting grooves form the fixing groove 109 in the middle of the second mounting surface 104 and the mounting grooves at two ends of the second mounting surface 104.

A third implementation structure is shown in fig. 9, in this implementation structure, the fixing structure includes two fixing bosses 1013 and two fixing pieces 1010, the fixing bosses 1013 are strip-shaped structures and are disposed on the second mounting surface 104 along the stacking direction of the mother substrate 105, the two fixing pieces 1010 are disposed at two ends of the second mounting surface 104 and form fixing holes 1011 in the form of counter bores with groove walls of mounting grooves at two ends of the second mounting surface 104, and then the fixing bosses 1013 and the fixing holes 1011 can be matched with the mounting structure of the material throwing head mounting base 204 to complete the fixed mounting of the material throwing head device. The fixing element 1010 and the mounting groove can be connected in a welding mode, the cross section structure of the fixing boss 1013 is a rectangular, semicircular or semi-elliptical structure, when a mother substrate is prepared by cutting or punching a plate, a plurality of small fixing bosses and small mounting grooves are directly formed by punching or cutting at corresponding positions of the corresponding mother substrate, and after a plurality of mother substrates are laminated to form a mother body, all the small fixing bosses and the small mounting grooves form the fixing boss 1013 in the middle of the second mounting surface 104 and the mounting grooves at two ends of the second mounting surface 104; the fixing boss 1013 may be directly mounted on the second mounting surface 104 by welding.

A fourth implementation structure is shown in fig. 10, in this implementation structure, the fixing structure includes a plurality of fixing bosses 1013 and two fixing pieces 1010, the fixing bosses 1013 are provided at intervals on the second mounting surface 104 along the stacking direction of the mother substrate 105 (two fixing bosses 1013 are shown in fig. 10), the number of the fixing pieces 1010 is two, the two fixing pieces 1010 are distributed at two ends of the second mounting surface 104, and form fixing holes 1011 in the form of counter bores with groove walls of mounting grooves at two ends of the second mounting surface 104, and then the fixing bosses 1013 and the fixing holes 1011 can be matched with the mounting structure of the material throwing head mounting base 204, so as to complete the fixed mounting of the material throwing head device. The fixing element 1010 and the mounting groove can be connected in a welding mode, the cross section structure of the fixing boss 1013 is a rectangular, semicircular or semi-elliptical structure, when a mother substrate is prepared by cutting or punching a plate, a plurality of small fixing bosses and small mounting grooves are directly formed by punching or cutting at corresponding positions of the corresponding mother substrate, and after a plurality of mother substrates are laminated to form a mother body, all the small fixing bosses and the small mounting grooves form the fixing boss 1013 in the middle of the second mounting surface 104 and the mounting grooves at two ends of the second mounting surface 104; the fixing boss 1013 may be directly mounted on the second mounting surface 104 by welding.

In this embodiment, the throwing block 102 is made of an abrasion resistant alloy material, the mother substrate 105 is supported by a common plate, and the fixing member 1010 and the fastening member 1012 are made of a metal material.

Example two

Referring to fig. 11 to 12, a rotor of an impact crusher disclosed in this embodiment includes a first disc 201, a second disc 202, a guard plate disposed on the first disc 201 and the second disc 202, and a plurality of inner throwing head devices and outer throwing head devices that are fixed between the first disc 201 and the second disc 202 and are uniformly distributed on the circumference, where at least one of the inner throwing head devices and the outer throwing head devices is specifically the throwing head device of the impact crusher in the first embodiment.

Specifically, a plurality of material throwing head installation seats 204 are uniformly distributed between the first disc 201 and the second disc 202 on the circumference, and the material throwing head installation seats 204 are provided with assembly blocks or assembly grooves corresponding to the fixing grooves or the fixing bosses on the matrix, and meanwhile, the first disc 201 and the second disc 202 are also provided with fastening bolts 205 corresponding to the fixing holes on the matrix. When the throwing head device 203 is mounted on the throwing head mounting seat 204, the fixing groove or the fixing boss on the fixing structure and the corresponding assembling block or assembling groove form concave-convex insertion fit to complete the positioning of the throwing head device 203, and then the fastening bolt 205 penetrates through the first disc 201 or the second disc 202 to be matched with the corresponding fixing hole to fix the throwing head device 203. Wherein, after the material throwing head device 203 is fixed, the material throwing surface on the material throwing head device faces to the circumferential direction or the outer radial direction of the rotor.

EXAMPLE III

Referring to fig. 13-14, an impact crusher is disclosed for the present embodiment, which comprises a driving device, a crushing chamber and the rotor of the impact crusher, which is rotatably connected in the crushing chamber by a rotating shaft and is in driving connection with the driving device.

The impact crusher is a horizontal shaft impact crusher, the crushing cavity comprises a first upper crushing cavity 301, a second upper crushing cavity 302 and a lower crushing cavity 303, the first upper crushing cavity 301 and the second upper crushing cavity 302 are respectively hinged to the upper opening of the lower crushing cavity 303, and the crushing cavity is formed by combining the first upper crushing cavity 301, the second upper crushing cavity 302 and the lower crushing cavity 303 together. In order to facilitate the maintenance and replacement of the throwing head, the crushing cavity needs to be frequently opened, and in order to facilitate the opening and closing of the crushing cavity, as a preferred scheme, the impact crusher in the above scheme further comprises a first oil cylinder 304 and a second oil cylinder 305 which are arranged outside the crushing cavity, one end of the first oil cylinder 304 is connected with the first upper crushing cavity 301, the other end of the first oil cylinder 304 is hinged with the lower crushing cavity 303, one end of the second oil cylinder 305 is hinged with the second upper crushing cavity 302, the other end of the second oil cylinder 305 is hinged with the lower crushing cavity 303, when the first oil cylinder 304 and the second oil cylinder 305 are extended, the first upper crushing cavity 301 and the second upper crushing cavity 302 are supported, the crushing cavity is opened, and when the first oil cylinder 304 and the second oil cylinder 305 are shortened, the first upper crushing cavity 301 and the second upper crushing cavity 302 are descended, and the crushing cavity is closed.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (10)

1. The material throwing head device of the impact crusher is characterized by comprising a parent body and a plurality of material throwing blocks, wherein the parent body comprises a first mounting surface and a second mounting surface which are opposite; the material throwing blocks are fixedly connected to the first mounting surface, the outer surface of each material throwing block forms a material throwing surface, and the material throwing surface covers the first mounting surface; the second mounting surface is provided with a fixing structure for fixedly mounting the matrix on a rotor of the impact crusher; the mother body is formed by laminating and fixing a plurality of mother body substrates.

2. The material throwing head device of an impact crusher as claimed in claim 1 wherein said throwing blocks are fixedly attached to said first mounting surface by male-female insertion.

3. The material throwing head device of the impact crusher according to claim 2, wherein a boss is arranged on the inner surface of the material throwing block, a groove corresponding to the boss is arranged on the first mounting surface, and the boss and the groove are correspondingly and fixedly matched to form a concave-convex insertion connection.

4. The material throwing head device of the impact crusher according to claim 2, wherein a groove is formed in the inner surface of the material throwing block, a boss corresponding to the groove is arranged on the first mounting surface, and the groove and the boss are correspondingly and fixedly matched to form a concave-convex insertion connection.

5. The throwing head device of an impact crusher according to claim 1, 2, 3 or 4, wherein the fixing structure comprises fixing holes arranged at two end faces of the parent body, and the fixing holes are through holes or counter bores.

6. The throwing head device of an impact crusher according to claim 1, 2, 3 or 4, wherein the fixing structure further comprises a fixing groove or a fixing boss provided on the second mounting surface.

7. A rotor of an impact crusher, comprising a first disc, a second disc, and a plurality of inner and outer throwing head devices fixed between the first and second discs and evenly distributed on the circumference, at least one of the inner and outer throwing head devices being the throwing head device of the impact crusher according to any one of claims 1 to 6.

8. An impact crusher comprising a drive means, a crushing chamber and the rotor of the impact crusher of claim 7, said rotor of the impact crusher being connected to the inside of the crushing chamber by a rotating shaft and being in driving connection with the drive means.

9. The impact crusher of claim 8, wherein the impact crusher is a horizontal shaft impact crusher, the crushing chambers comprise a first upper crushing chamber, a second upper crushing chamber and a lower crushing chamber, the first upper crushing chamber and the second upper crushing chamber are respectively hinged at an upper opening of the lower crushing chamber, and the crushing chambers are formed by combining the first upper crushing chamber, the second upper crushing chamber and the lower crushing chamber together.

10. The impact crusher of claim 9 further comprising a first cylinder and a second cylinder disposed outside said crushing chamber, one end of said first cylinder being hinged to said first upper crushing chamber and the other end of said first cylinder being hinged to said lower crushing chamber; one end of the second oil cylinder is hinged with the second upper crushing cavity, and the other end of the second oil cylinder is hinged with the lower crushing cavity; when the first oil cylinder and the second oil cylinder extend, the first upper crushing cavity and the second upper crushing cavity are supported, the crushing cavity is opened, when the first oil cylinder and the second oil cylinder shorten, the first upper crushing cavity and the second upper crushing cavity descend, and the crushing cavity is closed.

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