CN113399050B

CN113399050B - Hammer type ore crusher

Info

Publication number: CN113399050B
Application number: CN202110953021.5A
Authority: CN
Inventors: 闫长柏
Original assignee: Xuzhou Huachao Mine Equipment Co ltd
Current assignee: Xuzhou Huachao Mine Equipment Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2021-10-26
Anticipated expiration: 2041-08-19
Also published as: CN113399050A

Abstract

The invention relates to the technical field of ore crushing, in particular to a hammer type ore crusher, which comprises an underframe, a working frame and a crushing device, wherein the upper end of the underframe is in threaded connection with the working frame, and the crushing device is arranged in the working frame; the invention can solve the problems that when the traditional hammer crusher is used, ore with smaller volume is difficult to crush in time due to gaps in the crusher, the relative position of each hammer head of the traditional hammer crusher is fixed, and when ore fragments with smaller volume are needed, the crusher needs to be replaced, so that the hammer crusher has lower applicability and cannot be applied to other scenes and the like; the hammer crusher is designed to separate and crush ores with different sizes, pretreats the ores, improves the working efficiency of the hammer crusher, and can be applied to different scenes, so that the applicability of the hammer crusher is improved.

Description

Hammer type ore crusher

Technical Field

The invention relates to the technical field of ore crushing, in particular to a hammer type ore crusher.

Background

An ore crusher is a crushing machine for crushing ore materials by using impact energy, and is widely applied to various departments such as mines, smelting, building materials, roads, railways, water conservancy and the like.

At present, the following defects generally exist when crushing ore by a hammer crusher: 1. when a traditional hammer crusher is used for crushing ore materials, the ore is usually directly input into the crusher to uniformly crush ores with different sizes, and the ore with smaller size is difficult to crush in time due to gaps in the crusher, so that the working efficiency of the crusher is lower, and electric power resources are wasted; 2. the relative position of every tup of traditional hammer crusher all is fixed, and the specification of broken ore fragment is often fixed, then need change the breaker when the less ore fragment of needs volume, causes hammer crusher's suitability lower, can not be applied to other scenes, also can waste manpower and materials during the change.

Disclosure of Invention

In order to solve the problems, the invention specifically adopts the following technical scheme that the hammer type ore crusher comprises an underframe, a working frame and a crushing device, wherein the upper end of the underframe is in threaded connection with the working frame, and the crushing device is arranged in the working frame.

The work frame including fixed frame, working chamber, feeding frame and discharge gate, the fixed frame of upper end fixedly connected with of chassis has seted up the working chamber in the fixed frame, the upper end right side intercommunication of fixed frame has the feeding frame, the discharge gate has been seted up to the left and right sides symmetry of fixed frame lower extreme.

The crushing device comprises a screening mechanism, a U-shaped frame, a partition plate, a crushing mechanism, a driving mechanism and a through hole, wherein the screening mechanism is arranged on the upper side in the working cavity, the U-shaped frame is symmetrically fixed on the left side and the right side of the bottom of the working cavity, the partition plate is connected between the U-shaped frames, the crushing mechanism is arranged in the U-shaped frame, the driving mechanism is connected to the rear end of the crushing mechanism, and the through hole is uniformly formed in the lower side of the U-shaped frame.

Screening mechanism including screening board, the slider, a groove, return spring, the lug, the screening hole, through groove and shock dynamo, the top in the working chamber is provided with the screening board, two sliders are installed to both ends symmetry about the screening board, two recesses have been seted up on the inner wall of the working chamber left and right sides respectively, slider slidable mounting is in the recess, the slider passes through return spring and groove connection, the lug is evenly installed on the right side of screening board, the screening hole has evenly been seted up on the right side of screening board, and screening hole and lug are staggered arrangement, the through groove has been seted up to the left end of screening board, the lower extreme of screening board has shock dynamo through the pedestal mounting.

Preferably, the top plate is arranged above the left side in the working cavity, the lower end face of the top plate is evenly provided with the counterattack protruding rods, and the upper end of the top plate is installed on the working cavity through the elastic telescopic rods.

Preferably, the screening plate is in an inclined state, the left side of the screening plate is inclined downwards, and the inclined angle of the screening plate is the same as that of the top plate.

Preferably, broken mechanism include the live-rollers, annular baffle, spacing spout, the sliding block, the apparatus further comprises a rotating shaft, the quartering hammer, spacing spring, spacing branch chain and screens branch chain, the live-rollers is installed in the rotation of working chamber downside, evenly be provided with annular baffle on the outer wall of live-rollers, spacing spout has been seted up along its circumference on the toroidal surface of annular baffle, the sliding block is installed through sliding fit's mode in the spacing spout, even there is the pivot between the sliding block, install the quartering hammer in the pivot, the sliding block of front and back both sides passes through spacing spring and is connected with spacing spout, the end of separating of the sliding block of front and back both sides is provided with spacing branch chain, the rear side of the spacing branch chain of rear side is provided with the screens branch chain.

Preferably, the limiting branched chain comprises an L-shaped connecting rod, a circular cavity, a rotating shaft, a cam and a rotating rod, the L-shaped connecting rod is fixed on sliding blocks on the front side and the rear side, the circular cavity is symmetrically formed in the front side and the rear side of the rotating roller, the rotating shaft is installed in the rotating roller and rotates to penetrate through the circular cavity, the cam is installed on one section of the rotating shaft located in the circular cavity, and the rotating rod is connected to the rear end of the rotating shaft.

Preferably, the middle of the cam is a circular plate, arc-shaped lugs are uniformly arranged on the outer side wall of the circular plate, and one end of the L-shaped connecting rod close to the cam is tightly attached to the outer side wall of the circular plate.

Preferably, the screens branch include the constant head tank, the groove that slides, limit slide, screens spring, annular plate and reference column, have arranged the constant head tank along its circumference on the rear end face of live-rollers, the groove that slides has been seted up to the upper and lower bilateral symmetry of rotation axis rear side outer wall, slidable mounting has limit slide in the groove that slides, limit slide passes through the screens spring and is connected with the groove that slides, even have the annular plate between the limit slide, the reference column is installed to circumference on the preceding terminal surface of annular plate, the reference column slides and sets up in the constant head tank.

Preferably, the driving mechanism comprises a transmission gear, a driving belt, a driving gear and a driving motor, the transmission gear is installed on the outer wall of the rear side of the rotating roller, the driving belt is connected between the transmission gears, the driving gear is meshed in the middle of the driving belt, the rear end of the driving gear is connected with an output shaft of the driving motor, and the driving motor is installed on the outer wall of the fixing frame through a motor underframe.

Compared with the prior art, the invention has the beneficial effects that: 1. the invention designs a hammer crusher capable of separating and crushing ores with different sizes, which is different from the traditional hammer crusher, wherein the hammer crusher can be used for vibrating and separating ores with loose internal structures before hammer crushing, the working efficiency of the hammer crusher is improved by preprocessing the ores, and then the ores with different sizes are respectively conveyed to different hammer crushing devices for crushing, so that the problem that the ores with smaller sizes are difficult to crush in time is avoided, meanwhile, the sizes of crushed ore fragments can be adjusted, the hammer crusher can be applied to different scenes, the applicability of the hammer crusher is improved, and manpower and material resources are saved.

2. According to the hammer crusher, the vibrating motor drives the screening plate to vibrate, so that ores input from the feeding frame are subjected to vibration separation, auxiliary crushing is performed through the bumps, ores with different sizes are output from different places, the ores with loose internal structures are directly separated in the vibrating process, the burden of the hammer crusher is reduced, and the crushing process is refined through respective treatment.

3. According to the invention, ores can be crushed and separated by the rotary crushing hammer, when ore fragments with different volumes are required to be crushed, the cam is rotated by rotating the rotating shaft, the arc-shaped convex block is synchronously driven by the rotation of the cam to rotate to push the sliding block to move outwards, and then the crushing hammer is synchronously moved outwards, so that the distance between the crushing hammer and the U-shaped frame can be controlled, and the size of the ore fragments can be adjusted.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of a first three-dimensional structure of the present invention.

Fig. 2 is a second perspective view of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

Fig. 4 is a perspective view of the crushing mechanism of the present invention from a first perspective.

Fig. 5 is a schematic perspective view of a second perspective view of the crushing mechanism of the present invention.

Fig. 6 is a cross-sectional view of the crushing mechanism of the present invention.

Fig. 7 is a cross-sectional view taken along plane a-a of fig. 6 in accordance with the present invention.

Fig. 8 is a partial enlarged view at X of fig. 6 of the present invention.

In the figure: 1. a chassis; 2. a working frame; 21. a fixing frame; 22. a working chamber; 221. a top plate; 222. counterattack the nose bar; 223. an elastic telescopic rod; 23. a feeding frame; 24. a discharge port; 3. a crushing device; 31. a screening mechanism; 311. a screening plate; 312. a slider; 313. a groove; 314. a return spring; 315. a bump; 316. screening holes; 317. passing through the slot; 318. vibrating a motor; 32. a U-shaped frame; 33. a partition plate; 34. a crushing mechanism; 341. a rotating roller; 342. an annular partition plate; 343. a limiting chute; 344. a sliding block; 345. a rotating shaft; 346. a breaking hammer; 347. a limiting spring; 348. a limiting branched chain; 381. an L-shaped connecting rod; 382. a round cavity; 383. a rotating shaft; 384. a cam; 385. rotating the rod; 349. a clamping branched chain; 391. positioning a groove; 392. a sliding groove; 393. a limiting slide block; 394. a clamping spring; 395. an annular plate; 396. a positioning column; 35. a drive mechanism; 351. a transmission gear; 352. a drive belt; 353. a drive gear; 354. the motor is driven.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Referring to fig. 1, 2 and 3, a hammer type ore crusher comprises an underframe 1, a working frame 2 and a crushing device 3, wherein the upper end of the underframe 1 is in threaded connection with the working frame 2, and the crushing device 3 is arranged in the working frame 2.

Refer to and refer to fig. 1 and 3, work frame 2 including fixed frame 21, working chamber 22, feed frame 23 and discharge gate 24, the fixed frame 21 of upper end fixedly connected with of chassis 1, working chamber 22 has been seted up in the fixed frame 21, the upper end right side intercommunication of fixed frame 21 has feed frame 23, discharge gate 24 has been seted up to the left and right sides symmetry of fixed frame 21 lower extreme, concrete during operation, pour the ore into from feed frame 23 top, the ore falls into in working chamber 22 and earlier with screening mechanism 31 contact then, the ore falls out from discharge gate 24 after vibrations screening and hammer crush, then collect the ore fragment that has broken.

Referring to fig. 3, a top plate 221 is arranged above the left side in the working cavity 22, a counterattack protruding rod 222 is uniformly arranged on the lower end face of the top plate 221, and the upper end of the top plate 221 is mounted on the working cavity 22 through an elastic expansion rod 223.

Referring to fig. 3 and 4, the crushing device 3 includes a sieving mechanism 31, a U-shaped frame 32, a partition 33, a crushing mechanism 34, a driving mechanism 35 and a through hole 36, the sieving mechanism 31 is disposed on the upper side in the working chamber 22, the U-shaped frames 32 are symmetrically fixed on the left and right sides of the bottom of the working chamber 22, the partition 33 is connected between the U-shaped frames 32, the crushing mechanism 34 is disposed in the U-shaped frame 32, the driving mechanism 35 is connected to the rear end of the crushing mechanism 34, the through hole 36 is uniformly formed in the lower side of the U-shaped frame 32, when the crushing device works specifically, before crushing starts, the spacing branch 348 and the blocking branch 349 in the crushing mechanism 34 can be adjusted according to the required size of the ore fragments, so that the distance between the crushing hammer 346 and the inner arc surface of the U-shaped frame 32 is adjusted, the ore is poured from the upper side of the feeding frame 23, the ore falls into the working chamber 22 and contacts with the sieving mechanism 31, and is primarily vibrated and sieved by the sieving mechanism 31, the vibration screening has two purposes, namely, directly separating ores with unstable internal structures in the vibration process, carrying out pre-crushing treatment on the ores to reduce the burden of a hammer crusher, and separating and respectively treating the ores with different sizes; the separated ore fragments of different sizes are then crushed by the crushing mechanism 34, such that the ore fragments meeting the standard slide out of the through holes 36 and through the discharge port 24, and the ore fragments sliding out of the discharge port 24 are collected.

Referring to fig. 3, the screening mechanism 31 includes a screening plate 311, a slider 312, a groove 313, a return spring 314, a bump 315, a screening hole 316, a through groove 317 and a vibration motor 318, the screening plate 311 is disposed above the inside of the working chamber 22, two sliders 312 are symmetrically mounted at the left and right ends of the screening plate 311, two grooves 313 are respectively formed on the inner walls of the left and right sides of the working chamber 22, the sliders 312 are slidably mounted in the groove 313, the sliders 312 are connected with the groove 313 through the return spring 314, the bumps 315 are uniformly mounted on the right side of the screening plate 311, the screening hole 316 is uniformly formed on the right side of the screening plate 311, the screening hole 316 and the bumps 315 are arranged in a staggered manner, the through groove 317 is formed at the left end of the screening plate 311, and the vibration motor 318 is mounted at the lower end of the screening plate 311 through a base; screening board 311's left side downward sloping arrange, screening board 311's inclination is the same with the inclination of roof 221, concrete during operation, drive screening board 311 vibrations through shock dynamo 318, make slider 312 vibrations in recess 313 thereupon and act on return spring 314, drive lug 315 vibrations when screening board 311 vibrations, strengthen screening effect and enable comparatively loose ore soil piece dispersion through the striking between lug 315 and the ore, make the less ore of volume slide in the crushing mechanism 34 on right side from screening hole 316 and carry out the breakage, the great ore fragment of volume is from carrying out the breakage in sliding in left crushing mechanism 34 through 317 roll-off and sliding in.

Referring to fig. 4, 5 and 6, the crushing mechanism 34 includes a rotating roller 341, an annular partition 342, a limiting chute 343, a sliding block 344, a rotating shaft 345, a crushing hammer 346, a limiting spring 347, a limiting branched chain 348 and a clamping branched chain 349, the rotating roller 341 is rotatably installed at the lower side of the working chamber 22, the annular partition 342 is uniformly arranged on the outer wall of the rotating roller 341, the limiting chute 343 is opened along the circumferential direction of the annular partition 342 on the annular surface of the annular partition 342, the sliding block 344 is installed in the limiting chute 343 in a sliding fit manner, the rotating shaft 345 is connected between the sliding blocks 344, the crushing hammer 346 is installed on the rotating shaft 345, the sliding blocks 344 at the front and rear sides are connected with the limiting chute 343 through the limiting spring 347, the limiting branched chain 348 is arranged at the separated end of the sliding block 344 at the front and rear sides, the clamping branched chain 349 is arranged at the rear side of the limiting branched chain 348, and the sliding block 344 is moved to a proper position in the limiting chute 343 by adjusting the limiting branched chain 348 and the clamping branched chain 349 during specific operation, and then the rotating shaft 345 drives the breaking hammer 346 to synchronously move outwards, so as to control the distance between the breaking hammer 346 and the arc-shaped inner wall of the U-shaped frame 32, and then the driving mechanism 35 drives the rotating roller 341 to rotate, so that the annular partition plate 342 rotates along with the rotating roller and synchronously drives the limiting sliding groove 343 and the sliding block 344 to rotate, the sliding block 344 rotates to drive the rotating shaft 345 to rotate by taking the center of the rotating roller 341 as a rotation center, and then the breaking hammer 346 rotates along with the rotating shaft and breaks the falling ore.

Referring to fig. 6 and 7, the limiting branched chain 348 includes an L-shaped link 381, circular cavities 382, a rotating shaft 383, a cam 384 and a rotating rod 385, the L-shaped link 381 is fixed on the sliding blocks 344 at the front and rear sides, the circular cavities 382 are symmetrically formed in the front and rear sides of the rotating roller 341, the rotating shaft 383 is rotatably installed in the rotating roller 341, the rotating shaft 383 rotatably penetrates through the circular cavities 382, the cam 384 is installed at a section of the rotating shaft 383, which is located in the circular cavities 382, and the rotating rod 385 is connected to the rear end of the rotating shaft 383; the middle of the cam 384 is a circular plate, arc-shaped convex blocks are uniformly arranged on the outer side wall of the circular plate, the number of the arc-shaped convex blocks is the same as that of the L-shaped connecting rods 381, the L-shaped connecting rods 381 are not contacted with the arc-shaped convex blocks in the initial state, one end of the L-shaped connecting rods 381 close to the cam 384 is tightly attached to the outer side wall of the circular plate, when the automatic crusher works, the clamping effect of the clamping branched chain 349 is removed, the rotating rod 385 is manually rotated to enable the rotating shaft 383 to drive the cam 384 to rotate, the arc-shaped convex blocks on the cam 384 rotate along with the cam 384 and are gradually contacted with the L-shaped connecting rods 381, the arc-shaped convex blocks are contacted with the L-shaped connecting rods 381 to push the L-shaped connecting rods 381 to be outwards opened, the sliding blocks 344 slide in the limiting sliding grooves 343 and press the limiting springs 347, the sliding blocks 344 outwards slide to synchronously drive the rotating shaft 345 and the breaking hammers 346 to move outwards, and after the distance between the breaking hammers 346 and the arc-shaped inner wall of the U-shaped frame 32 is adjusted to a proper position, the rotation of the rotating rod 385 is stopped and positioned again by the blocking branch 349, preventing the relative rotation of the rotating roller 341 and the rotating shaft 383 during the crushing process.

Referring to fig. 5, 6 and 8, the positioning branch 349 includes a positioning groove 391, a sliding groove 392, a limiting slider 393, a positioning spring 394, a ring plate 395 and a positioning post 396, the positioning groove 391 is circumferentially arranged on the rear end surface of the rotating roller 341, the sliding grooves 392 are symmetrically arranged on the upper and lower sides of the outer wall of the rear side of the rotating shaft 383, the limiting slider 393 is slidably mounted in the sliding groove 392, the limiting slider 393 is connected with the sliding groove 392 through the positioning spring 394, the ring plate 395 is connected between the limiting sliders 393, the positioning post 396 is circumferentially mounted on the front end surface of the ring plate 395, the positioning post 396 is slidably disposed in the positioning groove 391, when the limiting branch 348 needs to be contacted and clamped, the ring plate 395 is pulled backwards to make the limiting slider 393 move backwards in the sliding groove 392 and press the positioning spring 394, the ring plate 395 moves backwards to synchronously drive the positioning post 396 to be drawn out from the positioning groove 391, the crushing mechanism 34 is adjusted by manually rotating the rotating rod 385, and after the adjustment is completed, the loose-ring-shaped plate 395 is clamped into the positioning groove 391 again under the elastic action of the clamping spring 394, and the positioning column 396 is clamped into the positioning groove 391 again to position the rotating shaft 383 again.

Referring to fig. 2, the driving mechanism 35 includes a transmission gear 351, a driving belt 352, a driving gear 353 and a driving motor 354, the transmission gear 351 is installed on the outer wall of the rear side of the rotating roller 341, the driving belt 352 is connected between the transmission gears 351, the driving gear 353 is engaged with the middle portion of the driving belt 352, the rear end of the driving gear 353 is connected with the output shaft of the driving motor 354, and the driving motor 354 is installed on the outer wall of the fixed frame 21 through a motor chassis.

The working steps of the invention are as follows: s1: before the crushing is started, the spacing between the crushing hammer 346 and the inner arc surface of the U-shaped frame 32 can be adjusted by adjusting the limiting branch 348 and the blocking branch 349 in the crushing mechanism 34 according to the required size of the ore fragments.

S2: pouring the ore into from the feeding frame 23 top again, the ore falls into in the working chamber 22 and contact with screening mechanism 31 earlier then, carries out preliminary screening of vibrations through screening mechanism 31 to the ore, and the here carries out screening of vibrations has two purposes, firstly in order to directly separate the unstable ore of inner structure at the vibrations in-process, carries out the burden that the preliminary crushing processing lightened hammer crusher to the ore, secondly in order to make the ore separation of volume size difference and handle respectively.

S3: the separated ore fragments of different sizes are then crushed separately by the crushing mechanisms 34 on both sides, so that the ore fragments meeting the standard slide out of the through holes 36 and through the discharge port 24.

S4: the ore fragments that slide out of the discharge port 24 are collected.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a hammer ore crusher, includes chassis (1), work frame (2) and breaker (3), its characterized in that: the upper end of the bottom frame (1) is in threaded connection with a working frame (2), and a crushing device (3) is arranged in the working frame (2);

the working frame (2) comprises a fixing frame (21), a working cavity (22), a feeding frame (23) and a discharging hole (24), the fixing frame (21) is fixedly connected to the upper end of the underframe (1), the working cavity (22) is formed in the fixing frame (21), the feeding frame (23) is communicated with the right side of the upper end of the fixing frame (21), and the discharging hole (24) is symmetrically formed in the left side and the right side of the lower end of the fixing frame (21);

the crushing device (3) comprises a screening mechanism (31), U-shaped frames (32), partition plates (33), crushing mechanisms (34), driving mechanisms (35) and through holes (36), the screening mechanism (31) is arranged on the upper side in the working cavity (22), the U-shaped frames (32) are symmetrically fixed on the left side and the right side of the bottom of the working cavity (22), the partition plates (33) are connected between the U-shaped frames (32), the crushing mechanisms (34) are arranged in the U-shaped frames (32), the driving mechanisms (35) are connected to the rear ends of the crushing mechanisms (34), and the through holes (36) are uniformly formed in the lower sides of the U-shaped frames (32);

the screening mechanism (31) comprises a screening plate (311), sliding blocks (312), grooves (313), return springs (314), lugs (315), screening holes (316), a passing groove (317) and a vibration motor (318), the screening plate (311) is arranged above the working cavity (22), the left end and the right end of the screening plate (311) are symmetrically provided with the two sliding blocks (312), the inner walls of the left side and the right side of the working cavity (22) are respectively provided with the two grooves (313), the sliding blocks (312) are slidably arranged in the grooves (313), the sliding blocks (312) are connected with the grooves (313) through the return springs (314), the lugs (315) are uniformly arranged on the right side of the screening plate (311), the screening holes (316) and the lugs (315) are arranged in a staggered manner, the passing groove (317) is arranged at the left end of the screening plate (311), the lower end of the screening plate (311) is provided with a vibration motor (318) through a base;

the crushing mechanism (34) comprises a rotating roller (341), an annular partition plate (342), a limiting sliding groove (343), sliding blocks (344), a rotating shaft (345), a crushing hammer (346), a limiting spring (347), a limiting branched chain (348) and a clamping branched chain (349), the rotating roller (341) is rotatably installed on the lower side of the working cavity (22), the annular partition plate (342) is uniformly arranged on the outer wall of the rotating roller (341), the limiting sliding groove (343) is formed in the annular surface of the annular partition plate (342) along the circumferential direction of the annular partition plate, the sliding blocks (344) are installed in the limiting sliding groove (343) in a sliding fit mode, the rotating shaft (345) is connected between the sliding blocks (344), the crushing hammer (346) is installed on the rotating shaft (345), the sliding blocks (344) on the front side and the rear side are connected with the limiting sliding groove (343) through the limiting spring (347), the limiting branched chain (348) is arranged at the separating ends of the sliding blocks (344) on the front side and the rear side, a clamping branch chain (349) is arranged at the rear side of the limiting branch chain (348) at the rear side;

the limiting branched chain (348) comprises an L-shaped connecting rod (381), a circular cavity (382), a rotating shaft (383), a cam (384) and a rotating rod (385), the L-shaped connecting rod (381) is fixed on sliding blocks (344) on the front side and the rear side, circular cavities (382) are symmetrically formed in the front side and the rear side of the rotating roller (341), the rotating shaft (383) is rotatably installed in the rotating roller (341), the rotating shaft (383) rotatably penetrates through the circular cavities (382), the cam (384) is installed on a section, located in the circular cavities (382), of the rotating shaft (383), and the rotating rod (385) is connected to the rear end of the rotating shaft (383);

the locating branch chain (349) comprises locating grooves (391), sliding grooves (392), limiting slide blocks (393), locating springs (394), annular plates (395) and locating columns (396), the locating grooves (391) are arranged on the rear end face of the rotating roller (341) along the circumferential direction of the rotating roller, the sliding grooves (392) are symmetrically formed in the upper side and the lower side of the outer wall of the rear side of the rotating shaft (383), the limiting slide blocks (393) are slidably mounted in the sliding grooves (392), the limiting slide blocks (393) are connected with the sliding grooves (392) through the locating springs (394), the annular plates (395) are connected among the limiting slide blocks (393), the locating columns (396) are circumferentially mounted on the front end faces of the annular plates (395), and the locating columns (396) are slidably arranged in the locating grooves (391);

the middle of the cam (384) is a circular plate, arc-shaped convex blocks are uniformly arranged on the outer side wall of the circular plate, and one end, close to the cam (384), of the L-shaped connecting rod (381) is tightly attached to the outer side wall of the circular plate.

2. A hammer mineral breaker according to claim 1 wherein: a top plate (221) is arranged above the left side in the working cavity (22), counterattack convex rods (222) are uniformly arranged on the lower end face of the top plate (221), and the upper end of the top plate (221) is installed on the working cavity (22) through an elastic telescopic rod (223).

3. A hammer mineral breaker according to claim 2 wherein: the left side of the screening plate (311) is arranged in a downward inclined mode, and the inclined angle of the screening plate (311) is the same as that of the top plate (221).

4. A hammer mineral breaker according to claim 1 wherein: the driving mechanism (35) comprises a transmission gear (351), a driving belt (352), a driving gear (353) and a driving motor (354), the transmission gear (351) is installed on the outer wall of the rear side of the rotating roller (341), the driving belt (352) is connected between the transmission gears (351), the driving gear (353) is meshed in the middle of the driving belt (352), the rear end of the driving gear (353) is connected with an output shaft of the driving motor (354), and the driving motor (354) is installed on the outer wall of the fixed frame (21) through a motor bottom frame.