LU601353B1

LU601353B1 - Roller Crusher with Uniform Crushing of Particles

Info

Publication number: LU601353B1
Application number: LU601353A
Authority: LU
Inventors: Ying Lei; Ge Yan
Original assignee: Xi’An Traffic Engineering Inst
Priority date: 2025-04-25
Filing date: 2025-04-25
Publication date: 2025-10-27

Abstract

The present invention relates to the field of crushers, in particular a roller crusher in which the crushed particles are uniform. It comprises a cabinet, a frame, a crushing mechanism, a downfeed assembly and a driving mechanism; a box is disposed on the rack, and has a feed opening at a top end, and a lower feed opening at a bottom end; the crushing mechanism is disposed inside the cabinet; a downfeed assembly is rotatably disposed on the cabinet below the feed opening, and downfeeds the crushing mechanism during reciprocating oscillation; the driving mechanism is used to drive the crushing mechanism to rotate and to drive the downfeed assembly to oscillate reciprocally. The present invention enables the downfeed rate to be determined based on the operating speed of the crushing mechanism, thereby compromising the prevention of material overflow and material processing efficiency.

Description

LU601353

Roller Crusher with Uniform Crushing of Particles

Field of Invention

The present invention relates to the field of crushers, in particular to a roller crusher in which crushed particles are uniform.

Description of Related Art

Crushers are typically used to crush feed or other large pieces of material to obtain granular material, typically using a roller configuration for material crushing.

Chinese Patent Publication No. CN216704498U discloses a novel feed roller crusher, comprising a tank, the crushing roller and the intermeshing roller are respectively movably connected by bearings on both sides at the center of the adjacent inner wall at the top of the case, and on both sides of adjacent inner walls at the bottom of the box are movably connected by bearings to intermeshing crushing rollers, the box is welded with guide plates distributed in an inverted V-type structure at the center of the adjacent inner walls immediately below the crushing rollers and the meshing rollers, and both sides of the guide plates are immediately above the crushing rollers, a receiving box communicating with the box is welded with the bottom of the box, and guide plates distributed in an inclined structure are welded on the inner side walls of the receiving box. The pulverizing roller according to the present invention is engaged with the engaging roller to perform primary pulverization of the feed, and the pulverized feed falls on the guide plate and slides to the engaging pulverizing roller to be pulverized again, thereby greatly improving the pulverizing effect and pulverizing efficiency of the roller type pulverizer.

However, the above-mentioned technical solution suffers from the following disadvantages:

The workers need to coordinate the rotational speeds of the crushing and intermeshing rolls to add the material to be crushed, which if added too quickly causes the material to spill outwardly from between the crushing and intermeshing rolls, and 1f added too slowly causes the processing efficiency of the apparatus to decrease.

SUMMARY OF THE INVENTION

It 1s an object of the present invention to address the problems of the background art by providing a roller crusher with uniform crushed particles that determines the downfeed speed based on the operating speed of the crushing mechanism, thereby compromising the prevention of material overflow and material processing efficiency.

The technical solution of the present invention, a roller crusher in which crushed particles are uniform, comprises a bin, a frame, a crushing mechanism, a downfeed assembly and a driving mechanism; a box 1s disposed on the rack, and has a feed opening at a top end, and a lower feed opening at a bottom end; the crushing mechanism is disposed inside the cabinet; a downfeed assembly is rotatably disposed on the cabinet below the feed opening, and downfeeds the crushing mechanism during reciprocating oscillation; the driving mechanism is used to drive the crushing mechanism to rotate and to drive the downfeed assembly to oscillate reciprocally.

Preferably, the material down assembly includes a fixed shaft disposed inside the box, a material guide rack disposed on the fixed shaft and an oscillating drum oscillating reciprocally, a swing drum top end has a charging port, the swing cylinder has a discharge port at a bottom end thereof, the swing cylinder 1s rotatably disposed on a fixed shaft, and the material guide frame includes a mounting cylinder portion coaxially disposed on the fixed shaft and two inclined plate portions integrally connected to the mounting cylinder portion in an inverted V shape, and the swing cylinder alternately exposes the bottom ends of the two inclined plate portions and forms a discharge passage with the exposed inclined plate portions.

Preferably, further comprising two sets of pressure-bearing assemblies symmetrically distributed on two sides of the oscillating cylinder, the pressure-bearing assemblies comprise a pressure-bearing plate, a sliding bar, a spring b and a fixing frame, the pressure-bearing plate is connected with an end of the sliding bar, the sliding bar sliding damping is arranged on the fixing frame, the fixing frame 1s arranged on an inner wall of the casing, and two ends of the spring b are respectively connected with the pressure-bearing plate and the fixing frame.

Preferably, the driving mechanism comprises a mounting cover, a motor, a mounting shaft, a rotating shaft a, a gear a, a gear b, an incomplete gear a, an incomplete gear b, a rotating shaft b, a double-sided rack, an intermediate gear, a transmission assembly a for drivingly connecting the mounting shaft and the rotating shaft a and a transmission assembly b for drivingly connecting the mounting shaft with the pulverizing mechanism;

The mounting cover is provided on an outer surface of the cabinet, a motor is disposed on the mounting cover inner wall, the motor 1s in driving connection with the mounting shaft, the mounting shaft is rotatably disposed on the case body, the gear a and the incomplete gear a are coaxially disposed on the rotation shaft a, the gear b and the imperfect gear b are coaxially disposed on the turning shaft b, the intermediate gear 1s in simultaneous meshing connection with gear a and gear b, the he incomplete gear a and the incomplete gear b rotate in the same direction and are alternately in meshing connection with the double-sided rack, the double-sided rack 1s a circular arc-shaped rack structure disposed on the side of the oscillating drum, the double-sided rack is coaxial with the fixed shaft, the inside of the double-sided rack has an engaging tooth a for engaging the incomplete gear a, the outside of the double-sided rack has an engaging tooth b for engaging the incomplete gear b, the rotating shaft a, the rotating shaft b and the intermediate gear are all rotatably disposed on the case.

Preferably, the transmission assembly a comprises a pulley a and a pulley b coaxially disposed on the mounting shaft and the rotation shaft a, respectively, and a belt a sleeved on the pulley a and the pulley b.

Preferably, the crushing mechanism comprises two crushing rollers symmetrically distributed;

The transmission assembly b comprises a gear c, a gear d, a rotating shaft c, a gear ¢ and a rotating shaft d, the gear c is arranged on the mounting shaft, the gear c is meshingly connected with the gear d, the gear d and the gear e are arranged on the rotating shaft c and the rotating shaft d respectively, the gear d and the gear e are meshingly connected, two crushing rollers are arranged on the rotating shaft ¢ and the rotating shaft d respectively, the rotating shaft ¢ and the rotating shaft d are both rotationally arranged on the casing.

Preferably, the lower lateral side of the box has a screening opening, and the inside of the box is provided with a screen gradually inclined from top to bottom towards the bottom end of the screening opening, the screen is located below the crushing mechanism and the bottom end abuts at the screening opening.

Preferably, further comprising a feed-back mechanism for recharging material slipped off the screen into the oscillating drum, the feed-back mechanism comprises two rotating shafts e arranged on the frame side by side rotating from bottom to top, a turning roller, one on each of the two turning axes e, a conveyor belt sleeved over two rotating rollers, a plurality of sets of pocket assemblies uniformly disposed on an outer circumferential surface of the conveyor belt, a hopper obliquely disposed at the top of the cabinet and communicating at the bottom end with the feed opening, a stopper disposed on the hopper and overturning the pocket assembly to drop the material into the hopper while blocking the pocket assembly from moving up, and a driving assembly c for drivingly connecting the rotating shaft c with one rotating shaft e;

The pocket assembly comprises a fixing bar, an end plate, a spring a, a sliding plate and a hopper, the fixing rod is a circular arc-shaped rod-like structure and both ends are respectively connected with the conveyor belt and the end plate, the spring a is sleeved on the outer peripheral side of the fixing rod and both ends are respectively connected with the sliding plate and the end plate, the sliding plate is slidably disposed on the fixing rod, the hopper is disposed on the sliding plate and both ends in the length direction have end surfaces for the stopper to abut against.

Compared with the prior art, the present invention has the following beneficial technical effects:

The present invention enables the downfeed rate to be determined based on the operating speed of the crushing mechanism in order to compromise material overflow i. prevention and material processing efficiency. In operation of the apparatus, the driving mechanism drives the pulverizing mechanism to rotate while driving the oscillating drum to oscillate reciprocally. The swing drum alternately forms a downfeed passage between the two inclined plate portions, the material in the swing drum can be alternately dropped through the two downfeed channels to be crushed between the crushing mechanisms, the downfeed process and the crushing process are simultaneously performed, and the dropped material can be sufficiently crushed by the crushing mechanism without spillage, and the crushing process efficiency of the material by the crushing mechanism is ensured. In the meantime, the inside of the wobble drum is sloshed during the wobble of the wobble drum, so that the clogging of the wobble drum is not easy, and the smoothness of the discharge of the wobble drum can be ensured.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 1s an enlarged view of the structure at A in FIG. 1;

FIG. 3 is a partial structural cross-sectional view of an embodiment of the present invention;

FIG. 4 1s an enlarged view of the structure at B in FIG. 3;

FIG. 5 is an enlarged view of the structure at C in FIG. 3;

FIG. 6 is a schematic view of the distribution of the mounting cylinder portion and the inclined plate portion within the oscillating cylinder.

Reference numerals: 1, cabinet; 101, feed port; 102, screening opening; 103,

lower inlet; 2, frame; 3, mounting cap; 4, motor; 5, mounting shaft; 6, pulley a; 7 belt a; 8, pulley b; 9, rotation axis a; 10, gear a; 11, gear b; 12, incomplete gear a; 13, incomplete gear b; 14, rotation axis b; 15, double sided rack; 16, intermediate gear; 17, fixed shaft; 181, mounting barrel; 182, inclined plate portion; 19, swing drum; 20, screen; 21, gear c; 22, gear d; 221, rotation axis c; 23, gear e; 231, rotation axis d; 24, crushing roller; 25, pulley c; 26, belt b; 27, pulley d; 28, rotation axis e; 29, rotating roller; 30, conveyor belt; 31, fixed rod; 32, end plate; 33, spring a; 34, sliding plate; 35, hopper; 36, Baffle; 37, guide hopper; 38, compression plate; 39, sliding bar; 40, spring b; 41, fixing frame; 42, Transport mechanism.

DETAILED DESCRIPTION OF THE INVENTION

Embodiment One

As shown in Fig. 1 to Fig. 6, the present embodiment provides a roller crusher for uniformly crushing particles, comprising a cabinet 1, a frame 2, a crushing mechanism, a downfeed assembly and a driving mechanism.

The cabinet 1 is arranged on the frame 2 and has an infeed opening 101 at the top, through which the material to be crushed is added, and a lower opening 103 at the bottom, through which the final crushed material is discharged.

The crushing mechanism is provided inside the box 1.

The downfeed assembly is rotatably arranged on the box 1 below the feed opening 101 and downfeeds the crushing mechanism during the reciprocating oscillation.

The material drop assembly includes a fixed shaft 17 disposed inside the box 1, a material guide rack disposed on the fixed shaft 17 and an oscillating drum 19 oscillating reciprocally, the swing drum 19 has a feeding port at its top end, the swing he drum 19 has a discharge port at its bottom end, the swing drum 19 is rotatably disposed on the fixed shaft 17, and the guide frame includes a mounting drum portion 181 coaxially disposed on the fixed shaft 17 and two inclined plate portions 182 integrally connected to the mounting drum portion 181 in an inverted V shape, and the swing drum 19 alternately exposes the bottom ends of the two inclined plate portions 182 and forms a discharge passage with the exposed inclined plate portions 182. When the swing drum 19 is rotated in one direction, one of the inclined plate portions 182 remains inside the swing drum 19 and the other inclined plate portion 182 is exposed to the lower end of the swing drum 19. The inclined plate portion 182 forms a lower path with the lower end of the swing drum 19, and the material in the swing drum 19 is slid down along the inclined plate portion 182 to be crushed between the crushing mechanism. When the oscillating drum 19 rotates in the reverse direction, the downfeed channel is exposed on the other side, so that an alternate downfeed of the two downfeed channels is achieved.

The driving mechanism is used to drive the crushing mechanism to rotate and to drive the downfeed assembly to oscillate reciprocally.

The frame 2 may be provided with a transport mechanism 42 which is positioned below the lower feed opening 103 to receive and transport the crushed particles.

The present embodiment enables the downfeed speed to be determined based on the operating speed of the crushing mechanism in order to compromise material overflow prevention and material processing efficiency. In use, the material to be crushed is added to the swing drum 19 through the feed opening 101, the material is ha accumulated in the swing drum 19, but the material does not leak because the two inclined plate portions 182 are plugged at the bottom end of the swing drum 19. In operation of the apparatus, the drive mechanism drives the pulverizing mechanism to rotate, and at the same time drives the oscillating drum 19 to oscillate to and fro. The oscillating drum 19 alternately forms a downfeed channel between the two inclined plate portions 182, in such a manner that the material contained in the swing drum 19 can be alternately dropped through the two downfeed channels to be crushed between the crushing mechanisms, the downfeed process and the crushing process are performed simultaneously, there is no need for manual intervention, the dropped material can be sufficiently crushed by the crushing mechanism, no overflow occurs, and the crushing process efficiency of the material by the crushing mechanism is ensured. At the same time, the inside of the wobble drum 19 is sloshed during the wobble of the wobble drum 19, so that the clogging of the wobble drum 19 is not easy, and the smoothness of the discharge of the wobble drum 19 can be ensured.

Example Two 3 and 5, the present embodiment proposes a roller crusher in which crushed particles are uniform, compared with the embodiment 1, in this embodiment, it further comprises two sets of pressure-bearing assemblies symmetrically distributed on both sides of the oscillating cylinder 19, the pressure-bearing assemblies comprise a pressure-bearing plate 38, a sliding bar 39, a spring b40 and a fixing frame 41, the pressure-bearing plate 38 is connected with the end of the sliding bar 39, the sliding bar 39 is provided with sliding damping, the fixing frame 41 is provided on the inner wall of the case 1, and the spring b40 is connected with the pressure-bearing plate 38 and the fixing frame 41 at both ends, respectively.

In the present embodiment, the impact of the swing drum 19 is received by the pressure-bearing members on both sides when the swing drum 19 is reciprocated, thereby reducing the impact noise generated by the operation of the apparatus. After the pressure bearing plate 38 is struck by the oscillating cylinder 19, the sliding rod 39 slides on the fixing frame 41, the spring b40 is compressed, the impact energy is consumed by the spring b40, and the oscillation amplitude of the pressure bearing plate 38 is reduced by the damped sliding between the sliding rod 39 and the fixing frame 41, so that the oscillating cylinder 19 can be restored to a steady state as soon as possible for the next reverse oscillation. After the swing drum 19 hits the pressure bearing plate 38, the speed drops suddenly, thereby allowing the swing drum 19 to shake the material inside, further improving the anti-clogging effect.

Example Three 1-4, the present embodiment proposes a roller crusher in which crushed particles are uniform, compared to Embodiment One or Embodiment Two, in this embodiment, the driving mechanism comprises a mounting cover 3, a motor 4, a mounting shaft 5, a rotating shaft a9, a gear alO, a gear bll, an incomplete gear al2, an incomplete gear bl3, a rotating shaft bl4, a double-sided rack 15, an intermediate gear 16, a transmission assembly a for drivingly connecting the mounting shaft 5 with the rotating shaft a9, and a transmission assembly b for drivingly connecting the mounting shaft 5 with the pulverizing mechanism.

A mounting cover 3 is provided on an outer surface of the cabinet 1, a motor 4 is provided on an inner wall of the mounting hood 3, the motor 4 is in driving connection with the mounting shaft 5, the mounting shaft 5 is rotatably disposed on the box 1, the gear A10 and the incomplete gear A12 are coaxially disposed on the turning shaft A9, the gear b11 and the incomplete gear b13 are coaxially disposed on the rotating shaft b14, the intermediate gear 16 1s in meshing connection with the gear alO and the gear bl 1 at the same time, incomplete gear al2 and incomplete gear bl3 rotate in the same direction and are alternately in meshing connection with double-sided rack 15, the double-sided rack 15 is a circular arc rack structure provided on the side of the swing drum 19, the double-sided rack 15 is coaxial with the fixed shaft 17, the inside of the double-sided rack 15 has an engaging tooth a for engaging the partial gear al2, the outside of the double-sided rack 15 has an engaging tooth b for engaging the partial gear bl3, and the rotating shaft a9, the rotating shaft bl4 and the intermediate gear 16 are all rotatably provided on the case 1. The motor 4 can drive the mounting shaft 5 to rotate, the mounting shaft 5 rotates the rotating shaft a9 through the transmission assembly a, the rotating shaft a9 rotates the gear wheel al0 and the incomplete gear wheel al2, the gear wheel alO rotates the gear wheel bll through the intermediate gear wheel 16, the gear wheel b11 rotates the incomplete gear wheel b13 through the rotating shaft b14, the two incomplete gear wheels rotate in the same direction and alternately engage with the double-sided gear rack 15, thereby rotating the double-sided gear rack 15 reciprocally.

In the absence of the pressure-bearing assembly of the second embodiment, the two partial gears can be engaged in sequence with the double-sided gear rack 15 in a seamless manner, thereby causing the double-sided gear rack 15 to oscillate reciprocally.

In using the pressure-bearing assembly in Embodiment Two, the number of teeth of the two incomplete gears is reduced, out of engagement with the double-sided rack when an incomplete gear turns the double-sided rack 15 from one oblique direction to the other oblique direction, under the force of gravity, the oscillating drum 19 is rotated to the other inclined direction and pressed against the pressure-bearing assembly, and after the oscillating drum 19 is smoothed, the other incomplete gear is engaged with the double-sided gear rack 15 again, so that the double-sided gear rack 15 is reversely rotated, and the reciprocating oscillation of the oscillating drum 19 is achieved, and at this time, there is a time interval during which the two incomplete gears are engaged with the double-sided gear rack 15.

The transmission assembly a includes a pulley a6 and a pulley b8 coaxially disposed on the mounting shaft 5 and the rotating shaft a9, respectively, and a belt a7 sleeved on the pulley a6 and the pulley b8. The mounting shaft 5 can rotate the rotating shaft a9 through the pulley a6, the belt a7 and the pulley b8, and the transmission process 1s smooth.

The crushing mechanism comprises two crushing rollers 24 symmetrically distributed between which the material can be efficiently crushed.

The transmission assembly b comprises a gear c21, a gear d22, a rotating shaft c221, a gear e23 and a rotating shaft d231, the gear c21 is arranged on the mounting shaft 5, the gear c21 1s meshingly connected with the gear d22, the gear d22 and the gear e23 are respectively arranged on the rotating shaft c221 and the rotating shaft d231, the gear d22 and the gear e23 are meshingly connected, two crushing rollers 24 are respectively arranged on the rotating shaft c221 and the rotating shaft a3 which are both rotationally arranged on the case 1. The mounting shaft 5 rotates the gear c21, the gear c21 rotates the one gear d22, the gear d22 rotates the gear e23, the gear d22 and the gear e23 rotate the rotating shaft c221 and the rotating shaft d231, respectively, so that the object of the two crushing rollers 24 rotating in opposite directions can be achieved, and the material can be efficiently crushed.

Example Four

As shown in Fig. 1 to Fig. 4, the present embodiment provides a roller crusher with uniform crushed particles. In the present embodiment, compared to the third embodiment, the case 1 has a screening opening 102 at the lower lateral side of the case 1, and the case 1 is provided with a screen 20 gradually inclined from top to bottom toward the bottom end of the screening opening 102. The screen 20 is located below the crushing mechanism and the bottom end abuts at the screening opening 102. With respect to the material crushed by the crushing mechanism, there are acceptable smaller-sized particles and non-acceptable larger-sized particles, the small particles fall directly through the screen 20 and are discharged through the lower opening 103, the large particles are blocked by the screen 20 and slide along the screen 20, and the large particles are discharged through the sieving opening 102 to facilitate the re-crushing process of the large particulate material.

The roller crusher further comprises a feed-back mechanism for feeding back material slipped off the screen 20 into the oscillating drum 19, the feed-back mechanism comprises two rotation shafts e28 provided on the frame 2 in side by side rotation from bottom to top, a turning roller 29 is provided one on each of the two turning axes e28, a conveyor belt 30 sleeved on the two rotating rollers 29, a plurality ha of sets of pocket assemblies uniformly disposed on the outer circumferential surface of the conveyor belt 30, a guide hopper 37 obliquely disposed at the top of the cabinet

I and communicating at the bottom end with the feed port 101, a stopper 36 disposed on the guide hopper 37 and overturning the pocket assembly to drop the material into the guide hopper 37 when the pocket assembly is blocked from moving up, and a driving assembly c for drivingly connecting the rotary shaft c221 with a rotary shaft ¢28. The transmission assembly c includes a pulley c25, a belt b26 and a pulley d27, the pulley c25 and the pulley d27 are respectively disposed on a rotating shaft c221 and one rotating shaft e28, and the belt b26 is sleeved on the pulley c25 and the pulley d27.

Rotating shaft c221 is able to rotate rotating shaft e28 via drive assembly c, thereby moving conveyor belt 30, which moves sets of pocket assemblies with conveyor belt 30. The large particulate material is discharged from the screening opening 102 and falls into the pocket assembly, which is stopped by the holder 36 and rotated downwardly as the pocket assembly moves from bottom to top to the holder 36, so that the large particulate material in the pocket assembly slides into the hopper 37 and falls through the feed opening 101 into the swing drum 19 for further dropping and crushing. Particle uniformity of the final crushed material is guaranteed.

The pocket assembly comprises a fixing bar 31, an end plate 32, a spring a33, a sliding plate 34 and a hopper 35, the fixed rod 31 has a circular arc-shaped rod-like structure and both ends are respectively connected with the conveyor belt 30 and the end plate 32, the spring a33 is sleeved on the outer peripheral side of the fixed rod 31 and both ends are respectively connected with the sliding plate 34 and the end plate he 32, the sliding plate 34 is slidably disposed on the fixed rod 31, the hopper 35 is disposed on the sliding plate 34 and both ends in the length direction have end surfaces against which the stopper 36 abuts. As the pocket assembly moves upward, the fixed rod 31 moves upward. As the end face of the hopper 35 moves to the stop 36 and continues to move upward, the hopper 35 rotates downward due to the stop 36. The sliding plate 34 slides on the fixed rod 31 and compresses the spring a33. The hopper 35 gradually tilts and pours the large particulate material into the guide hopper 37. The large particulate material slides down the guide hopper 37 into the swing drum 19. When the hopper 35 is removed from the stopper 36, the spring a33 pushes the sliding plate 34 to slide in the reverse direction, and the sliding plate 34 is moved back to the position of the conveyor belt 30.

Although embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited thereto, and various modifications can be made without departing from the spirit and scope of the present invention within the purview of those skilled in the art.

Claims

Claims LU601353

1. A roller crusher for uniform crushing of particles, comprising: A frame (2); A box (1) disposed on a frame (2) and having a feed opening (101) at a top end and a lower opening (103) at a bottom end; A crushing mechanism disposed inside the box (1); A downfeed assembly rotatably disposed on the cabinet (1) below the feed opening (101) and downfeed to the crushing mechanism during reciprocal oscillation; A drive mechanism for driving the pulverizing mechanism to rotate and driving the downfeed assembly to oscillate reciprocally.

2. The uniform crushed particle roller crusher of claim 1, characterized in that, the material down assembly comprises a fixed shaft (17) arranged inside the box (1), a material guide rack arranged on the fixed shaft (17) and an oscillating drum (19) oscillating reciprocally, a wobbling drum (19) has a feeding port at a top end thereof, the swing drum (19) has a discharge port at a bottom end thereof, the swing drum (19) is rotatably disposed on the fixed shaft (17), and the guide frame includes a mounting drum portion (181) coaxially disposed on the fixed shaft (17) and two inclined plate portions (182) integrally connected to the mounting drum portion (181) in an inverted V shape, and the swing drum (19) alternately exposes the bottom ends of the two inclined plate portions (182) and forms a discharge passage with the exposed inclined plate portions (182).

3. The uniform crushed particle roller crusher of claim 2, characterized by further comprising two sets of pressure-bearing assemblies symmetrically distributed on two sides of the oscillating cylinder (19), the pressure-bearing assemblies comprise a pressure-bearing plate (38), a sliding bar (39), a spring b (40) and a fixing frame (41), the pressure-bearing plate (38) is connected with an end of the sliding bar (39), the sliding bar (39) is slidingly arranged on the fixing frame (41), the fixing frame (41) 1s arranged on an inner wall of the box (1), and two ends of the spring b (40) are respectively connected with the pressure-bearing plate (38) and the fixing frame (41).

4. A uniform crushed particle roller crusher according to claim 2 or 3, characterized in that the driving mechanism comprises a mounting cover (3), a motor (4), a mounting shaft (5), a rotating shaft a (9), a gear a (10), a gear b (11), an incomplete gear a (12), an incomplete gear b (13), a rotating shaft b (14), a double-sided rack (15), an intermediate gear (16), a transmission assembly a for drivingly connecting the mounting shaft (5) and the rotating shaft a (9) and a transmission assembly b for drivingly connecting the mounting shaft (5) with the pulverizing mechanism; A mounting cover (3) is provided on an outer surface of the box (1), a motor (4) is provided on an inner wall of the mounting cap (3), the motor (4) is in driving connection with the mounting shaft (5), the mounting shaft (5) is rotatably arranged on the box (1), a gear a (10) and an incomplete gear a (12) are coaxially disposed on a rotation axis a (9), gear b (11) and incomplete gear b (13) are coaxially disposed on rotation shaft b (14), the intermediate gear (16) is in simultaneous meshing connection with gear a (10) and gear b (11), incomplete gear a (12) and incomplete gear b (13) rotate in the same direction and are alternately in meshing connection with double-sided rack (15), the double-sided rack (15) is a circular arc rack structure provided on the side of the oscillating drum (19), the double-sided rack (15) is coaxial with the fixed shaft (17), the inner side of the double-sided rack (15) has an engaging tooth a for engaging the incomplete gear a (12), the outer side of the double-sided rack (15) has an engaging tooth b for engaging the incomplete gear b (13), the rotating shaft a (9), the rotating shaft b (14) and the intermediate gear (16) are all rotatably provided on the case (1).

5. The roller crusher according to claim 4, characterized in that the transmission assembly a comprises a pulley a (6) and a pulley b (8) coaxially disposed on the mounting shaft (5) and the rotation shaft a (9), respectively, and a belt a (7) sleeved on the pulley a (6) and the pulley b (8).

6, The roller crusher according to claim 4, characterized in that the crushing mechanism comprises two crushing rollers (24) symmetrically distributed; The transmission assembly b comprises a gear c (21), a gear d (22), a rotating shaft c (221), a gear e (23) and a rotating shaft d (231), the gear c (21) 1s arranged on the mounting shaft (5), the gear c (21) is meshingly connected with the gear d (22), the gear d (22) and the gear e (23) are respectively arranged on the rotating shaft c (221) and the rotating shaft d (231), the gear d (22) and the gear e (23) are meshingly connected, two pulverizing rollers (24) are respectively arranged on the rotating shaft c (221) and the rotating shaft d (231), the rotating shaft c (221) and the rotating shaft d (231) are both rotationally arranged on the casing (1).

7. The roller crusher according to claim 4, characterized in that the casing (1)

has a screening opening (102) at the lower lateral side thereof, and the casing Wis internally provided with a screen (20) inclined gradually from top to bottom towards the bottom end of the screening opening (102), the screen (20) is located below the crushing mechanism and the bottom end abuts at the screening opening (102).

8. The uniform crushed particle roller crusher of claim 7, characterized in that, further comprising a feed-back mechanism for recharging material slipped off the screen (20) into the oscillating drum (19), the feed-back mechanism comprises two axes of rotation e (28) arranged on the frame (2) in side by side rotation from bottom to top, a rotating roller (29), one on each of the two rotating axes e (28), a conveyor belt (30) sleeved on two rotating rollers (29), a plurality of sets of pocket assemblies uniformly disposed on the outer circumferential surface of the conveyor belt (30), a hopper (37) obliquely disposed at the top of the cabinet (1) with the bottom end communicating with the feed opening (101), a stopper (36) disposed on the hopper (37) and overturning the pocket assembly to drop the material into the hopper (37) while blocking the pocket assembly from moving up, and a driving assembly c for drivingly connecting the rotational axis c (221) with one of the rotational axes e (28); The pocket assembly comprises a fixing rod (31), an end panel (32), a spring a (33), a sliding panel (34) and a hopper (35), the fixed rod (31) is a circular arc-shaped rod-like structure and both ends are respectively connected with the conveyor belt (30) and the end plate (32), the spring a (33) is sleeved on the outer peripheral side of the fixed rod (31) and both ends are respectively connected with the sliding plate (34) and the end plate (32), the sliding plate (34) is slidably disposed on the fixed rod (31), the hopper (35) is disposed on the sliding plate (34) and both ends in the length direction have end surfaces for the stopper (36) to abut against.