Novel high-temperature asphalt crushing device

Abstract

The utility model relates to the technical field of sodium ion batteries, in particular to a novel high-temperature asphalt crushing device which comprises a mounting frame, a crushing bin and a crushing mechanism, and the crushing bin comprises a bin body rotationally mounted on the mounting frame, two groups of chambers symmetrically arranged in the bin body and a power assembly for driving the bin body to rotate; the crushing mechanism comprises two groups of mounting assemblies, and for crushing assemblies arranged on the mounting assemblies, the crushing assemblies comprise rotating mechanisms, crushing rod mechanisms arranged on the rotating mechanisms and pressing mechanisms for driving the crushing rod mechanisms to move; the two groups of cavities are arranged up and down, the crushing rod mechanisms rotate to roughly crush asphalt in the upper cavity, then the crushing bin is turned over by 180 degrees, meanwhile, the corresponding pressing mechanisms drive the corresponding crushing rod mechanisms to move outwards, and after turning over is completed, the crushing rod mechanisms rotate again to finely crush the asphalt, and the asphalt falls into the lower cavity. The technical problem that in the prior art, rough crushing and fine crushing need two sets of equipment, and consequently the crushing efficiency is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium ion batteries, in particular to a novel high-temperature asphalt crushing device. Background Art

[0002] Electric vehicles are a popular new energy technology. Unlike small portable batteries, batteries used in electric vehicles require greater energy density and higher output power. Electric vehicle batteries need to be charged and discharged with large currents in a short period of time, so higher requirements are placed on the specific capacity of the positive and negative electrode materials of the battery. Natural graphite is now widely used as the negative electrode material of sodium batteries, but it does not support large current discharge and has the characteristic of easily reacting with the electrolyte, resulting in poor battery cycle performance. The current mainstream practice is to oxidize, dope, and coat the surface of natural graphite. During the production process, the high-temperature asphalt raw materials need to be coarsely and finely crushed.

[0003] The utility model patent with Chinese patent application number CN202221911501.1 discloses a micron-level ultra-fine high-temperature asphalt mechanical crusher, including a support box, a fixed box, an extension box, a first motor, a first clutch, a first rotating shaft, a support box, a positioning box, a second motor, a second clutch, a second rotating shaft, multiple cutting wheels, a second transmission wheel, a first transmission wheel and a first transmission belt. The right end of the first rotating shaft and the right end of the second rotating shaft are both connected to the third transmission wheel, and the two third transmission wheels are connected through the second transmission belt. An isolation net is connected to the middle of the inner wall of the support box, and multiple impact balls are arranged on the lower side of the isolation net. Spikes are arranged on the outer wall of each impact ball, and a material guide net is connected to the lower part of the support box. The bottom of the right end of the support box is connected to a ventilation pipe, and the right end of the ventilation pipe is connected to a high-pressure pump. The utility model has the characteristics of reducing the damage caused by long-term work at the power transmission part, reducing the situation affecting the working progress, being beneficial to the operation of the equipment, and having good crushing performance.

[0004] However, the equipment can only crush high-temperature asphalt to one specification. Coarse crushing and fine crushing require two sets of equipment, which affects the crushing efficiency. Utility Model Content

[0005] In view of the above problems, the utility model provides a novel high-temperature asphalt crushing device, which drives the crushing rod mechanism to rotate through two sets of rotating mechanisms to perform coarse crushing of the high-temperature asphalt. The asphalt falls into the chamber below, and then the crushing bin rotates 180°. At the same time, the pressing mechanism drives the crushing rod mechanism to move radially outward. The two sets of rotating mechanisms drive the crushing rod mechanism to rotate again to perform fine crushing of the high-temperature asphalt, which solves the technical problem in the prior art that coarse crushing and fine crushing require two sets of equipment, thereby affecting the crushing efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A new type of high-temperature asphalt crushing device, comprising:

[0008] Mounting frame;

[0009] A crushing bin, the crushing bin comprising a cylindrical bin body rotatably mounted on the mounting frame, two groups of chambers symmetrically arranged in the bin body and connected to each other, and a power assembly driving the bin body to rotate, wherein the bin body rotates so that the two groups of chambers are turned upside down; and

[0010] A crushing mechanism, the crushing mechanism comprising two groups of mounting components symmetrically arranged on both sides of the bin body in radial direction, two groups of crushing components arranged on the mounting components and symmetrically arranged between the two groups of chambers, the crushing component comprising a rotating mechanism, a crushing rod mechanism arranged on the rotating mechanism, and a pressing mechanism arranged inside the rotating mechanism and driving the crushing rod mechanism to move radially along the rotating mechanism;

[0011] The two groups of chambers are arranged up and down, and the rotating mechanism drives the breaking rod mechanism to rotate to roughly break the asphalt in the upper chamber and drop it into the lower chamber. Then the crushing bin flips 180°, and at the same time the corresponding pressing mechanism drives the corresponding breaking rod mechanism to move radially outward. After the flipping is completed, the rotating mechanism drives the breaking rod mechanism to rotate again to finely break the asphalt in the upper chamber and drop it into the lower chamber.

[0012] As an improvement, the power assembly includes a motor seat arranged on the mounting frame, a motor a arranged on the motor seat, and a coupling connecting the power output shaft of the motor a and the rotating shaft of the crushing bin.

[0013] As an improvement, the mounting assembly includes a mounting seat a arranged on the side of the warehouse body and a mounting seat b installed on the side of the warehouse body and located outside the mounting seat a.

[0014] As an improvement, the rotating mechanism includes bearings respectively installed on the mounting seats a on both sides, hollow shafts correspondingly rotatably installed on the two groups of bearings, hollow rollers coaxially arranged between the two groups of hollow shafts and connected to the hollow shafts, and a motor b installed on the mounting seat b and dynamically connected to the hollow shafts.

[0015] As an improvement, the breaking rod mechanism includes several groups of breaking units distributed along the length of the hollow roller, and the breaking units include breaking rods distributed in a circular array on the hollow roller and radially slidingly arranged along the hollow roller, mounting plates arranged on both sides of the breaking rods, and springs a correspondingly mounted on the mounting plates and connected to the inner wall of the hollow roller.

[0016] As an improvement, the pressing mechanism includes a guide sleeve coaxially installed at one end of the hollow shaft close to the hollow roller, a guide groove a correspondingly opened on the guide sleeve, a moving rod slidably penetrating through two groups of the guide sleeves, a guide key correspondingly slidably arranged in the guide groove a and arranged on the moving rod, a circular plate arranged at the end of the moving rod, a spring b sleeved on the moving rod and connecting the circular plate and the guide sleeve, a driving unit power-connecting the moving rod and the crushing rod mechanism, and a limiting unit controlling the movement of the moving rod.

[0017] As an improvement, the driving unit includes a connecting plate arranged at the other end of the moving rod relative to the circular plate, a cross beam erected above the connecting plate, a guide groove b opened on the connecting plate, a limiting rod in a "C" shape with one end rotatably installed on the cross beam and the other end slidably arranged in the guide groove b, a contact rod a arranged at the free end of the connecting plate, a cylinder mounting seat installed on the mounting seat b, a cylinder installed on the cylinder mounting seat, and a contact rod installed on the power shaft of the cylinder and capable of being in contact with the end of the contact rod a.

[0018] As an improvement, the guide groove b includes two groups of vertical sections symmetrically arranged left and right, and a V-shaped section a and a V-shaped section b respectively connecting the ends of the two groups of vertical sections, and the V-shaped angles of the V-shaped section a and the V-shaped section b are arranged in opposite directions.

[0019] As an improvement, the driving unit includes a contact plate correspondingly arranged at the bottom of the crushing rod and a contact block arranged on the moving rod and correspondingly arranged with the crushing unit. The contact block includes a contact part a and a contact part b capable of being in contact with the contact plate and a wedge part connecting the contact part a and the contact part b.

[0020] The beneficial effects of the present utility model are as follows:

[0021] (1) In the present utility model, two groups of rotating mechanisms respectively drive the crushing rod mechanism to rotate to roughly crush the high-temperature asphalt. Then, the power assembly drives the bin body to rotate 180°. At the same time, the pressing mechanism drives the crushing rod in the crushing rod mechanism to move outwards and approach the other group of rotating mechanisms. When the rotating mechanism rotates, the two groups of crushing rod mechanisms finely crush the high-temperature asphalt, so that the rough crushing and the fine crushing are successively completed in a set of equipment, improving the crushing efficiency of the high-temperature asphalt.

[0022] (2) In the utility model, the two sets of pressing mechanisms can independently drive the corresponding crushing rod mechanisms to move. When the crushing rods in the two sets of crushing rod mechanisms are in place, the crushing produces the largest particles; when the crushing rods in the two sets of crushing rod mechanisms are both extended, the crushing produces the smallest particles; when the crushing rod in any crushing rod mechanism is extended, the crushing produces particles of intermediate size; thus, different crushing modes can be selected according to production needs, thereby improving the applicability of the equipment;

[0023] (3) In the utility model, the power assembly drives the bin body to rotate, which can cause the high-temperature asphalt in the chamber to shake, so that the high-temperature asphalt can quickly enter between the two sets of rotating mechanisms and be crushed by the crushing rod mechanism, further improving the crushing efficiency of the high-temperature asphalt.

[0024] In summary, the utility model has the advantages of simple structure and high crushing efficiency, and is particularly suitable for the production of negative electrode materials for sodium ion batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a cross-sectional structural diagram of the utility model;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 It is a schematic diagram of the crushing mechanism structure;

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 for Figure 4 Enlarged view of center C. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] Example:

[0035] like Figure 1 and Figure 2 As shown, a new high-temperature asphalt crushing device comprises:

[0036] Mounting frame 1;

[0037] A crushing bin 2, the crushing bin 2 comprising a cylindrical bin body 21 rotatably mounted on the mounting frame 1, two groups of chambers 22 symmetrically arranged in the bin body 21 and connected to each other, and a power assembly 23 driving the bin body 21 to rotate, wherein the bin body 21 rotates so that the two groups of chambers 22 are turned upside down; and

[0038] A crushing mechanism 3, the crushing mechanism 3 comprises two groups of mounting components 30 symmetrically arranged on both sides of the bin body 21 in a radial direction, two groups of crushing components 31 arranged on the mounting components 30 and symmetrically arranged between the two groups of chambers 22, the crushing component 31 comprises a rotating mechanism 311, a crushing rod mechanism 312 arranged on the rotating mechanism 311, and a pressing mechanism 313 arranged inside the rotating mechanism 311 and driving the crushing rod mechanism 312 to move radially along the rotating mechanism 311;

[0039] The two groups of chambers 22 are arranged up and down, and the rotating mechanism 311 drives the breaking rod mechanism 312 to rotate to roughly break the asphalt in the upper chamber 22 and drop it into the lower chamber 22. Then the crushing bin 2 flips 180°, and at the same time the corresponding pressing mechanism 313 drives the corresponding breaking rod mechanism 312 to move radially outward. After the flipping is completed, the rotating mechanism 311 drives the breaking rod mechanism 312 to rotate again to finely break the asphalt in the upper chamber 22 and drop it into the lower chamber 22.

[0040] It should be noted that the chamber 22 is conical at one end close to the crushing mechanism 3, so as to facilitate the entry of materials into the crushing mechanism 3; the chamber 22 is correspondingly provided with a rotatable door.

[0041] Further, such as Figure 1 As shown, the power assembly 23 includes a motor seat 231 arranged on the mounting frame 1, a motor a232 arranged on the motor seat 231, and a coupling 233 connecting the power output shaft of the motor a232 and the rotating shaft of the crushing bin 2.

[0042] It should be noted that the motor a232 is a reduction motor and needs to be used in conjunction with an encoder to ensure the accuracy of the rotation angle of the crushing bin 2 driven by the motor a232.

[0043] Furthermore, the mounting assembly 30 includes a mounting seat a301 disposed on the side of the warehouse body 21 and a mounting seat b302 installed on the side of the warehouse body 21 and located outside the mounting seat a301.

[0044] It should be noted that the mounting seat a301 and the mounting seat b302 are welded to the outside of the warehouse body 21.

[0045] Further, such as Figures 3 to 6 As shown, the rotating mechanism 311 includes bearings 3111 respectively installed on the mounting seats a301 on both sides, hollow shafts 3112 correspondingly installed on the two groups of bearings 3111 for rotation, a hollow roller 3113 coaxially arranged between the two groups of hollow shafts 3112 and connected to the hollow shafts 3112, and a motor b3114 installed on the mounting seat b302 and powered by the hollow shafts 3112.

[0046] It should be noted that the motor b3114 is a reduction motor, and the two groups of motors b3114 are arranged to rotate synchronously.

[0047] Further, such as Figure 5As shown, the breaking rod mechanism 312 includes a plurality of breaking units 3121 distributed along the length of the hollow roller 3113, and the breaking units 3121 include breaking rods 31211 distributed in a circular array on the hollow roller 3113 and radially slidingly arranged along the hollow roller 3113, mounting plates 31212 arranged on both sides of the breaking rods 31211, and springs a31213 correspondingly installed on the mounting plates 31212 and connected to the inner wall of the hollow roller 3113.

[0048] It should be noted that the breaking rods 31211 on the two groups of breaking rod mechanisms 312 are arranged alternately.

[0049] It should be further explained that when the crushing rod 31211 moves radially along the hollow shaft 3112, the end of the crushing rod 31211 approaches and moves away from the other set of hollow rollers 3112, thereby controlling the size of the crushed particles.

[0050] Further, such as Figures 4 to 6 As shown, the pressing mechanism 313 includes a guide sleeve 3131 coaxially installed on one end of the hollow shaft 3112 close to the hollow roller 3113, a guide groove a3132 correspondingly opened on the guide sleeve 3131, a moving rod 3133 slidably inserted into the two groups of the guide sleeves 3131, a guide key 3134 correspondingly slidably arranged in the guide groove a3132 and arranged on the moving rod 3133, a circular plate 3135 arranged at the end of the moving rod 3133, a spring b3136 sleeved on the moving rod 3133 and connecting the circular plate 3135 and the guide sleeve 3131, a driving unit 3137 dynamically connecting the moving rod 3133 and the breaking rod mechanism 312, and a limiting unit 314 for controlling the movement of the moving rod 3133.

[0051] It should be noted that the guide key 3134 and the guide groove a3132 ensure that the moving rod 3133 maintains linear motion.

[0052] Further, such as Figure 2 and Figure 6As shown, the driving unit 3137 includes a connecting plate 31371 disposed at the other end of the moving rod 3133 relative to the circular plate 3135, a cross beam 31372 erected above the connecting plate 31371, a guiding groove b31373 opened on the connecting plate 31371, a limiting rod 31374 in a "C" shape with one end rotatably mounted on the cross beam 31372 and the other end slidably disposed in the guiding groove b31373, a contact rod a31375 disposed at the free end of the connecting plate 31371, a cylinder mounting seat 31376 mounted on the mounting seat b302, a cylinder 31377 mounted on the cylinder mounting seat 31376, and a contact rod 31378 mounted on the power shaft of the cylinder 31377 and capable of being in contact with the end of the contact rod a31375.

[0053] It should be noted that when the rotating mechanism 311 rotates, the contact rod a31375 and the contact rod 31378 are in a non-contact state, and the stroke of the cylinder 31377 can ensure that the contact rod a31375 and the contact rod 31378 are in contact and there is a surplus.

[0054] Furthermore, as Figure 6 shown, the guiding groove b31373 includes two groups of vertical segments 315 symmetrically arranged on the left and right, and a V-shaped segment a316 and a V-shaped segment b317 respectively connecting the ends of the two groups of vertical segments 315. The V-shaped angles of the V-shaped segment a316 and the V-shaped segment b317 are arranged in opposite directions.

[0055] It should be noted that, as Figure 6 shown, the V-shaped angles of the V-shaped segment a316 and the V-shaped segment b317 are arranged in opposite directions so that the limiting rod 31374 always moves in one direction in the guiding groove b31373.

[0056] Furthermore, as Figure 3 shown, the driving unit 3137 includes a contact plate 31301 correspondingly disposed at the bottom of the crushing rod 31211 and a contact block 31302 disposed on the moving rod 3133 and correspondingly disposed with the crushing unit 3121. The contact block 31302 includes a contact portion a313021 and a contact portion b313022 capable of being in contact with the contact plate 31301, and a wedge portion 313023 connecting the contact portion a313021 and the contact portion b313022.

[0057] It should be noted that during the process of the contact plate 31301 moving from the contact portion a313021 through the wedge portion 313023 to the contact portion b313022, the crushing rod 31211 moves outward.

[0058] Working process:

[0059] The high-temperature asphalt to be crushed enters the chamber 22, the motor b3114 drives the hollow shaft 3112 and the hollow roller 3113 to rotate, the crushing rod 31211 roughly crushes the high-temperature asphalt, and the crushed high-temperature asphalt enters the chamber 22 below, and then the motor a232 drives the warehouse body 21 to rotate 180°, and at the same time, the two groups of cylinders 31377 simultaneously drive the contact rod 31378 to conflict with the abutment rod a31375, and push the connecting plate 31371 and the moving rod 3133 to move, and the limit rod 313 The end of 74 passes through the V-shaped segment b317 through the vertical segment 315 and enters the V-shaped segment a316, and the contact plate 31301 moves from the contact portion a313021 through the wedge-shaped portion 313023 to the contact portion b313022, and several groups of the crushing rods 31211 extend outward, and then the cylinder 31377 drives the contact rods 31378 to reset, and then the two groups of motors b3114 drive the hollow shaft 3112 and the hollow roller 3113 to rotate, and the crushing rods 31211 break the high-temperature asphalt.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of high temperature asphalt crushing device, characterized in that: include: Mounting frame (1); A crushing bin (2), the crushing bin (2) comprising a cylindrical bin body (21) rotatably mounted on the mounting frame (1), two groups of chambers (22) symmetrically arranged in the bin body (21) and connected to each other, and a power assembly (23) driving the bin body (21) to rotate, wherein the bin body (21) rotates so that the two groups of chambers (22) are turned upside down; and A crushing mechanism (3), the crushing mechanism (3) comprising two groups of mounting assemblies (30) symmetrically arranged on both radial sides of the bin body (21), two groups of crushing assemblies (31) arranged on the mounting assemblies (30) and between the two groups of chambers (22) arranged symmetrically at the center, the crushing assembly (31) comprising a rotating mechanism (311), a crushing rod mechanism (312) arranged on the rotating mechanism (311), and a pressing mechanism (313) arranged inside the rotating mechanism (311) and driving the crushing rod mechanism (312) to move radially along the rotating mechanism (311); The two groups of chambers (22) are arranged vertically, and the rotating mechanism (311) drives the crushing rod mechanism (312) to rotate to roughly crush the asphalt in the upper chamber (22) and drop it into the lower chamber (22). Then, the crushing bin (2) flips 180 degrees, and at the same time, the corresponding pressing mechanism (313) drives the corresponding crushing rod mechanism (312) to move radially outward. After the flipping is completed, the rotating mechanism (311) drives the crushing rod mechanism (312) to rotate again to finely crush the asphalt in the upper chamber (22) and drop it into the lower chamber (22).

2. A new type of high temperature asphalt crushing device according to claim 1, characterized in that: The power assembly (23) comprises a motor seat (231) arranged on the mounting frame (1), a motor a (232) arranged on the motor seat (231), and a coupling (233) connecting a power output shaft of the motor a (232) and a rotating shaft of the crushing bin (2).

3. A novel high-temperature asphalt crushing device according to claim 1, characterized in that: The mounting assembly (30) comprises a mounting seat a (301) arranged on the side of the bin body (21) and a mounting seat b (302) mounted on the side of the bin body (21) and located outside the mounting seat a (301).

4. A new type of high temperature asphalt crushing device according to claim 3, characterized in that: The rotating mechanism (311) comprises bearings (3111) respectively mounted on the mounting seats a (301) on both sides, hollow shafts (3112) mounted on two groups of the bearings (3111) for corresponding rotation, a hollow roller (3113) coaxially arranged between the two groups of the hollow shafts (3112) and connected to the hollow shafts (3112), and a motor b (3114) mounted on the mounting seat b (302) and connected to the hollow shafts (3112) in terms of power.

5. A new type of high temperature asphalt crushing device according to claim 4, characterized in that: The crushing rod mechanism (312) includes several groups of crushing units (3121) distributed along the length of the hollow roller (3113). Each crushing unit (3121) includes a crushing rod (31211) that is circumferentially and arrayedly distributed on the hollow roller (3113) and is slidably arranged radially along the hollow roller (3113), mounting plates (31212) arranged on both sides of the crushing rod (31211), and spring a (31213) correspondingly mounted on the mounting plates (31212) and connected to the inner wall of the hollow roller (3113).

6. A new type of high temperature asphalt crushing device according to claim 5, characterized in that: The pressing mechanism (313) includes a guide sleeve (3131) coaxially mounted at one end of the hollow shaft (3112) close to the hollow roller (3113), a guide groove a (3132) correspondingly opened on the guide sleeve (3131), a moving rod (3133) slidably penetrating through two groups of the guide sleeves (3131), a guide key (3134) correspondingly slidably arranged in the guide groove a (3132) and arranged on the moving rod (3133), a circular plate (3135) arranged at the end of the moving rod (3133), a spring b (3136) sleeved on the moving rod (3133) and connecting the circular plate (3135) and the guide sleeve (3131), a driving unit (3137) power-connecting the moving rod (3133) and the crushing rod mechanism (312), and a limiting unit (314) controlling the movement of the moving rod (3133).

7. A novel high-temperature asphalt crushing device according to claim 6, characterized in that: The driving unit (3137) includes a connecting plate (31371) arranged at the other end of the moving rod (3133) relative to the circular plate (3135), a cross beam (31372) erected above the connecting plate (31371), a guide groove b (31373) opened on the connecting plate (31371), a limiting rod (31374) in a "C" shape with one end rotatably mounted on the cross beam (31372) and the other end slidably arranged in the guide groove b (31373), a contact rod a (31375) arranged at the free end of the connecting plate (31371), a cylinder mounting seat (31376) mounted on the mounting seat b (302), a cylinder (31377) mounted on the cylinder mounting seat (31376), and a contact rod (31378) mounted on the power shaft of the cylinder (31377) and capable of being in contact with the end of the contact rod a (31375).

8. A novel high-temperature asphalt crushing device according to claim 7, characterized in that: The guide groove b (31373) includes two groups of vertical segments (315) symmetrically arranged on the left and right, and a V-shaped segment a (316) and a V-shaped segment b (317) respectively connecting the ends of the two groups of vertical segments (315). The V-shaped angles of the V-shaped segment a (316) and the V-shaped segment b (317) are arranged in opposite directions.

9. A novel high-temperature asphalt crushing device according to claim 6, characterized in that: The limiting unit (314) comprises a contact plate (31301) correspondingly arranged at the bottom of the crushing rod (31211) and a contact block (31302) arranged on the moving rod (3133) and correspondingly arranged to the crushing unit (3121), wherein the contact block (31302) comprises a contact portion a (313021) and a contact portion b (313022) which can be contacted with the contact plate (31301) and a wedge-shaped portion (313023) which transitionally connects the contact portion a (313021) and the contact portion b (313022).

Images