阅读说明：本技术 一种双动颚式破碎机 (double-acting jaw crusher ) 是由 张峰 王旭 王晓波 陈帮 刘方明 唐威 于 2019-08-06 设计创作，主要内容包括：本发明涉及破碎设备技术领域,提供一种双动颚式破碎机,包括机架、静颚部、动颚部和驱动机构,动颚部包括第一动颚部和第二动颚部；驱动机构驱动第一动颚部、第二动颚部的上端同步作旋向相反的离心运动；第一动颚部和第二动颚部的下端相连接,第一动颚部的下端通过拉杆组件连接机架；静颚部与第一动颚部之间构成破碎腔；本发明在两个动颚部的周期性相向的离心运动下,通过与静颚部的相互作用,实现了对物料的破碎作业,其破碎工作稳定可靠,对物料的破碎效果和排料速度得到了显著的提高,大大提高了破碎机的工作效率。(The invention relates to the technical field of crushing equipment, and provides a double-acting jaw crusher which comprises a rack, a static jaw part, a movable jaw part and a driving mechanism, wherein the movable jaw part comprises a first movable jaw part and a second movable jaw part; the driving mechanism drives the upper ends of the first movable jaw part and the second movable jaw part to synchronously do centrifugal motion with opposite rotation directions; the lower ends of the first movable jaw part and the second movable jaw part are connected, and the lower end of the first movable jaw part is connected with the rack through a pull rod assembly; a crushing cavity is formed between the static jaw part and the first movable jaw part; the invention realizes the crushing operation of the material through the interaction with the static jaw part under the periodical and opposite centrifugal motion of the two movable jaw parts, the crushing operation is stable and reliable, the crushing effect and the discharging speed of the material are obviously improved, and the working efficiency of the crusher is greatly improved.)

1. A double-acting jaw crusher comprises a frame, a fixed jaw part, a movable jaw part and a driving mechanism, wherein the fixed jaw part and the driving mechanism are installed on the frame; it is characterized in that the preparation method is characterized in that,

The movable jaw part comprises a first movable jaw part and a second movable jaw part;

The driving mechanism is respectively connected with the upper ends of the first movable jaw part and the second movable jaw part and drives the upper ends of the first movable jaw part and the second movable jaw part to synchronously perform centrifugal motion with opposite rotation directions;

the lower end of the first movable jaw part is connected with the lower end of the second movable jaw part, and the lower end of the first movable jaw part is connected with the rack through a pull rod assembly;

The static jaw and the first movable jaw are arranged oppositely to form a crushing cavity between the static jaw and the first movable jaw.

2. The double-acting jaw crusher of claim 1, wherein the drive mechanism comprises a first eccentric shaft, a second eccentric shaft, a drive gear and a driven gear;

The driving gear is arranged on a central shaft of the first eccentric shaft, the driven gear is arranged on a central shaft of the second eccentric shaft, and the driving gear is meshed with the driven gear, wherein the central shaft of the first eccentric shaft is connected with a rotary driving mechanism;

The eccentric part of the first eccentric shaft is connected with the upper end of the first movable jaw part, and the eccentric part of the second eccentric shaft is connected with the upper end of the second movable jaw part.

3. The double-action jaw crusher of claim 2, characterized in that,

the rotary driving mechanism comprises a belt pulley, a transmission belt and a driving motor;

The output end of the driving motor is connected with the belt pulley through a transmission belt, and the belt pulley is coaxially connected with the central shaft of the first eccentric shaft.

4. The double-acting jaw crusher of any of claims 1 to 3, wherein the tie rod assembly comprises a tie rod, a tension spring, a ram and an adjusting nut;

The middle part of the pull rod penetrates through a baffle on the rack;

The front end of the pull rod is hinged to the lower end of the first movable jaw part, the pull rod is sequentially sleeved with the tensioning spring and the pressure head towards the rear end of the pull rod, the rear end of the pull rod is connected with the adjusting nut through threads, and the tensioning spring is located between the baffle and the pressure head.

5. A double-acting jaw crusher as claimed in claim 4, characterised in that the lower end of the second movable jaw is connected to a toggle plate holder, the front side of which is hinged to one end of a front toggle plate, the other end of which is hinged to the lower end of the first movable jaw.

6. A double-acting jaw crusher as claimed in claim 5, characterised in that the rear side of the toggle plate holder is hinged to one end of a rear toggle plate, the other end of which is hinged to an adapter; the adapter is provided with a guide piece, and the guide piece is matched with the guide hole in the baffle; the baffle has adjusting bolt through threaded connection, adjusting bolt's tip with the adapter contacts or adjusting bolt with the adapter passes through threaded connection.

7. the double-acting jaw crusher of claim 1, wherein the stationary jaw, the first movable jaw and the second movable jaw are arranged in sequence from front to back on the frame; the static jaw part and the first movable jaw part are oppositely arranged in an inverted splayed shape; and the frame is also provided with edge guard plates positioned at the left side and the right side of the crushing cavity.

8. the double-action jaw crusher of claim 7, wherein the stationary jaw and the movable jaw plates are provided on the side opposite to the first movable jaw, respectively.

9. The double-acting jaw crusher of claim 2, characterized in that the ratio of the eccentricity of the second eccentric shaft to the first eccentric shaft is 1 to 3, wherein the eccentricity of the first eccentric shaft is 10 to 30 mm; the gear ratio of the driving gear to the driven gear is 1-2.

Technical Field

The invention relates to the technical field of crushing equipment, in particular to a double-acting jaw crusher.

background

At present, a jaw crusher is composed of a frame part, a movable jaw part, a stationary jaw part, a transmission system, a tension part, and the like. According to the different swing modes of the movable jaw, the jaw crusher can be divided into two common modes of a simple swing jaw crusher and a compound swing jaw crusher. The jaw crusher with compound pendulum has its movable jaw rotating around the eccentric shaft and also swinging around the same center periodically to constitute the jaw crusher with complicated motion. The compound pendulum jaw crusher is different from the simple pendulum jaw crusher in that a suspension shaft and a front toggle plate connected with a movable jaw part on the simple pendulum jaw crusher are removed, the movable jaw part is suspended on an eccentric shaft, and a connecting rod and the movable jaw part are combined into a whole to form the compound pendulum jaw crusher.

In compound pendulum jaw breaker, the quiet jaw pinion rack of quiet jaw portion, move the jaw pinion rack that moves of jaw portion, and the sideboard of frame portion has constituted the working chamber, and when moving jaw portion and being close to quiet jaw portion, the working chamber diminishes, produces the squeezing action and with the material breakage to the material in the working chamber, when moving jaw portion and keeping away from quiet jaw portion, the working chamber grow, the material downstream under the action of gravity is discharged from the bin outlet to accomplish broken operation.

However, when the existing compound pendulum jaw crusher works, the movable jaw part and the fixed jaw part only move relatively, and the materials are crushed in a one-way extrusion mode, so that the crushing efficiency is low, and the crushing effect is not ideal.

in a patent document with publication number CN2014207273908, publication date 2015, 8 and 19, a double-acting jaw crusher is disclosed. This double acting jaw breaker has increased one and has moved jaw portion when having cancelled quiet jaw portion, and the first space that moves between jaw portion and the second has moved the broken working chamber that has constituted, moves the periodic variation of working chamber between jaw portion through first and second, has realized the broken operation to the material.

In patent document CN105032535A, publication No. 11/2015, the publication No. CN105032535A, a dual-vibration exciter vibration self-synchronizing crusher is disclosed, which comprises a frame part, two working movable jaw assemblies, a torsion shaft and the like, wherein a motor drives an eccentric block mechanism to move through a flexible universal coupling, centrifugal force generated by high-speed rotation of the eccentric block mechanism drives the two movable jaw parts to synchronously reciprocate at high frequency, and a crushing operation process is realized by applying high-frequency pulsation to materials.

However, in the above-described jaw crusher having the double movable jaw structure, although the crushing effect on the material is increased to some extent by the relative movement of the double movable jaws, since the stationary jaw is eliminated and the crushing operation is performed only by the interaction between the two movable jaws, it is difficult to ensure that the crushing operation is performed in a stable operating state of the crusher, a large crushing force cannot be further provided in the crushing operation, and the discharging effect of the crusher is not satisfactory, and it is difficult to improve the crushing efficiency as a whole.

Disclosure of Invention

Technical problem to be solved

the invention aims to provide a double-acting jaw crusher, which is used for solving the problems that the conventional double-acting jaw crusher without a static jaw part is difficult to ensure crushing operation in a stable working state and has low crushing efficiency.

(II) technical scheme

In order to solve the technical problem, the invention provides a double-acting jaw crusher, which comprises a frame, a fixed jaw part, a movable jaw part and a driving mechanism, wherein the fixed jaw part and the driving mechanism are arranged on the frame; the movable jaw part comprises a first movable jaw part and a second movable jaw part; the driving mechanism is respectively connected with the upper ends of the first movable jaw part and the second movable jaw part and drives the upper ends of the first movable jaw part and the second movable jaw part to synchronously perform centrifugal motion with opposite rotation directions; the lower end of the first movable jaw part is connected with the lower end of the second movable jaw part, and the lower end of the first movable jaw part is connected with the rack through a pull rod assembly; the static jaw and the first movable jaw are arranged oppositely to form a crushing cavity between the static jaw and the first movable jaw.

preferably, the driving mechanism of the present invention comprises a first eccentric shaft, a second eccentric shaft, a driving gear and a driven gear; the driving gear is arranged on a central shaft of the first eccentric shaft, the driven gear is arranged on a central shaft of the second eccentric shaft, and the driving gear is meshed with the driven gear, wherein the central shaft of the first eccentric shaft is connected with a rotary driving mechanism; the eccentric part of the first eccentric shaft is connected with the upper end of the first movable jaw part, and the eccentric part of the second eccentric shaft is connected with the upper end of the second movable jaw part.

Preferably, the rotary driving mechanism comprises a belt pulley, a transmission belt and a driving motor; the output end of the driving motor is connected with the belt pulley through a transmission belt, and the belt pulley is coaxially connected with the central shaft of the first eccentric shaft.

Preferably, the pull rod assembly comprises a pull rod, a tensioning spring, a pressure head and an adjusting nut; the middle part of the pull rod penetrates through a baffle on the rack; the front end of the pull rod is hinged to the lower end of the first movable jaw part, the pull rod is sequentially sleeved with the tensioning spring and the pressure head towards the rear end of the pull rod, the rear end of the pull rod is connected with the adjusting nut through threads, and the tensioning spring is located between the baffle and the pressure head.

Preferably, in the present invention, the lower end of the second movable jaw is connected to the toggle plate holder, the front side of the toggle plate holder is hinged to one end of the front toggle plate, and the other end of the front toggle plate is hinged to the lower end of the first movable jaw.

preferably, the rear side of the toggle plate seat is hinged with one end of a rear toggle plate, and the other end of the rear toggle plate is hinged with the adapter seat; the adapter is provided with a guide piece, and the guide piece is matched with the guide hole in the baffle; the baffle has adjusting bolt through threaded connection, adjusting bolt's tip with the adapter contacts or adjusting bolt with the adapter passes through threaded connection.

Preferably, in the invention, the fixed jaw part, the first movable jaw part and the second movable jaw part are sequentially arranged from front to back on the frame; the static jaw part and the first movable jaw part are oppositely arranged in an inverted splayed shape; and the frame is also provided with edge guard plates positioned at the left side and the right side of the crushing cavity.

Preferably, in the invention, the side surface of the opposite side of the fixed jaw part and the first movable jaw part is correspondingly provided with a fixed jaw toothed plate and a movable jaw toothed plate.

Preferably, the ratio of the eccentricity of the second eccentric shaft to the eccentricity of the first eccentric shaft is 1 to 3, wherein the eccentricity of the first eccentric shaft is 10 to 30 mm; the gear ratio of the driving gear to the driven gear is 1-2.

(III) technical effects

The double-acting jaw crusher provided by the invention has the advantages that the static jaw part, the first movable jaw part and the second movable jaw part are simultaneously arranged on the frame, and when the crusher works in practice, a crushing cavity is formed between the static jaw part and the first movable jaw part, and because the driving mechanism drives the upper ends of the first movable jaw part and the second movable jaw part to synchronously do centrifugal motion with opposite rotation directions, when the first movable jaw makes a centrifugal motion toward the stationary jaw in a counterclockwise rotation in the first half cycle, the second movable jaw part inevitably makes a centrifugal motion towards the first movable jaw part in the same first half period and rotates clockwise, at the moment, the lower end of the second movable jaw part gives a thrust towards the crushing force direction to the first movable jaw part, so that the crushing effect is enhanced, and similarly, in the second half period, the first movable jaw part is driven by the second movable jaw part to be accelerated away from the static jaw part, so that the discharging operation can be completed quickly.

Therefore, the double-acting jaw crusher realizes the crushing operation of the material through the interaction with the static jaw part under the periodical opposite centrifugal motion of the two movable jaw parts, the crushing operation is stable and reliable, the crushing effect and the discharging speed of the material are obviously improved, and the working efficiency of the crusher is greatly improved.

Drawings

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

Fig. 1 is a schematic structural view of a double-action jaw crusher according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

Fig. 3 is a schematic view of the rotation of the first and second eccentric shafts during a crushing operation of the double-action jaw crusher according to an embodiment of the present invention.

In the figure: 1-a rack, 2-a fixed jaw, 3-a first movable jaw, 4-a second movable jaw, 5-a first eccentric shaft, 6-a second eccentric shaft, 7-a driving gear, 8-a driven gear, 9-a belt pulley, 10-a driving belt, 11-a driving motor, 12-a pull rod, 13-a tensioning spring, 14-a pressure head, 15-an adjusting nut, 16-a baffle, 17-a toggle plate seat, 18-a front toggle plate, 19-a rear toggle plate, 20-an adapter seat, 21-an adjusting bolt, 22-a fixed jaw plate, 23-a movable jaw plate, 24-a crushing cavity, 25-a guide piece and 26-a side guard plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the present embodiment provides a double-acting jaw crusher, which includes a frame 1, a stationary jaw 2, a movable jaw, and a driving mechanism, where the stationary jaw 2 and the driving mechanism are installed on the frame 1; the movable jaw part comprises a first movable jaw part 3 and a second movable jaw part 4; the driving mechanism is respectively connected with the upper ends of the first movable jaw part 3 and the second movable jaw part 4 and drives the upper ends of the first movable jaw part 3 and the second movable jaw part 4 to synchronously do centrifugal motion with opposite rotation directions; the lower ends of the first movable jaw part 3 and the second movable jaw part 4 are connected, and the lower end of the first movable jaw part 3 is connected with the rack 1 through a pull rod assembly; the stationary jaw 2 is arranged opposite the first movable jaw 3 to constitute a crushing chamber 24 between the stationary jaw 2 and the first movable jaw 3.

As can be seen from the structure of the double-jaw crusher shown in fig. 1-2, by providing the fixed jaw 2, the first movable jaw 3 and the second movable jaw 4 on the frame 1 at the same time, in actual operation, a crushing chamber 24 is formed between the fixed jaw 2 and the first movable jaw 3, and since the driving mechanism drives the upper ends of the first movable jaw 3 and the second movable jaw 4 to synchronously perform centrifugal motions with opposite rotation directions, when the first movable jaw 3 performs centrifugal motions with counterclockwise rotation toward the fixed jaw 2 in the first half period, the second movable jaw 4 inevitably performs centrifugal motions with clockwise rotation toward the first movable jaw 3 in the same first half period, and at this time, the lower end of the second movable jaw 4 gives the first movable jaw 3 a thrust force in the direction of the crushing force, so as to enhance the crushing effect, and similarly, in the second half period, the first movable jaw 3 is driven by the second movable jaw 4, accelerating away from the static jaw part 2 so as to quickly finish the discharging operation.

Therefore, the double-acting jaw crusher realizes the crushing operation of the materials through the interaction with the static jaw part 2 under the periodical opposite centrifugal motion of the two movable jaw parts. Compared with the traditional double-acting jaw crusher, the double-acting jaw crusher has the advantages that the crushing work is more stable and reliable, the crushing effect and the discharging speed of materials are remarkably improved, and the working efficiency of the crusher is greatly improved.

Further, the driving mechanism in this embodiment includes a first eccentric shaft 5, a second eccentric shaft 6, a driving gear 7 and a driven gear 8; the driving gear 7 is arranged on the central shaft of the first eccentric shaft 5, the driven gear 8 is arranged on the central shaft of the second eccentric shaft 6, the driving gear 7 is meshed with the driven gear 8, and the central shaft of the first eccentric shaft 5 is connected with a rotary driving mechanism; the eccentric part of the first eccentric shaft 5 is rotatably connected with the upper end of the first movable jaw 3, the eccentric part of the second eccentric shaft 6 is rotatably connected with the upper end of the second movable jaw 4, and the eccentric parts of the first eccentric shaft 5 and the second eccentric shaft 6 are similar to a cam structure.

Specifically, during actual operation, the first eccentric shaft 5 rotates along its central axis under the driving of the rotation driving mechanism, and due to the transmission action between the driving gear 7 and the driven gear 8, the second eccentric shaft 6 performs rotation motion along its central axis opposite to the rotation direction of the first eccentric shaft 5, so that the eccentric portion of the first eccentric shaft 5 and the eccentric portion of the second eccentric shaft 6 drive the corresponding first movable jaw 3 and second movable jaw 4, thereby synchronously performing centrifugal motion in opposite rotation directions.

Further, the rotary driving mechanism in the embodiment comprises a belt pulley 9, a transmission belt 10 and a driving motor 11; an output end of the driving motor 11 (a pulley for power transmission may be provided at the output end of the driving motor 11) is connected to the pulley 9 through a driving belt 10, and the pulley 9 is coaxially connected to the central axis of the first eccentric shaft 5, so that the pulley 9 directly provides a driving force for coaxial rotation to the central axis of the first eccentric shaft 5.

Further, the pull rod assembly in the present embodiment includes a pull rod 12, a tension spring 13, a pressure head 14 and an adjusting nut 15; the middle part of the pull rod 12 passes through a guide hole on a baffle plate 16 on the frame 1; the front end of the pull rod 12 is hinged with the lower end of the first movable jaw part 3, the pull rod 12 is sequentially sleeved with a tensioning spring 13 and a pressure head 14 towards the rear end thereof, the rear end of the pull rod 12 is connected with an adjusting nut 15 through threads, and the tensioning spring 13 is positioned between a baffle 16 and the pressure head 14.

Specifically, the pull rod assembly shown in the present embodiment is used to provide elastic support for the lower end of the first movable jaw 3, so as to control the size of the discharge opening formed between the lower end of the stationary jaw 2 and the lower end of the first movable jaw 3. In actual operation, the feed amount of the pull rod 12 can be adjusted by adjusting the adjusting nut 15 at the rear end of the pull rod 12, so that the size of the discharge port formed between the lower end of the fixed jaw 2 and the lower end of the first movable jaw 3 can be controlled by the pull rod 12. Meanwhile, as the tension spring 13 is arranged between the baffle plate 16 and the pressure head 14, and the pressure head 14 stops the adjusting nut 15, the rear end of the pull rod 12 is connected with the baffle plate 16 on the frame 1 through the tension spring 13, so that the pull rod assembly plays a role of elastically supporting the lower end of the first movable jaw 3, and the first movable jaw 3 can adapt to impact of different materials on the first movable jaw.

Further, in the present embodiment, the lower end of the second movable jaw 4 is connected to the toggle plate seat 17, the front side of the toggle plate seat 17 is hinged to one end of the front toggle plate 18, and the other end of the front toggle plate 18 is hinged to the lower end of the first movable jaw 3.

Therefore, in actual work, the second movable jaw 4 performs the first half period of centrifugal motion, the lower end of the second movable jaw 4 can give direct thrust to the lower end of the first movable jaw 3 through the front toggle plate 18, so that the crushing effect of the first movable jaw 3 on materials can be greatly enhanced, and the second movable jaw 4 performs the second half period of centrifugal motion, correspondingly, the lower end of the first movable jaw 3 can be given certain follow-up pulling force through the front toggle plate 18, so that the lower end of the first movable jaw 3 is accelerated to be far away from the static jaw 2, and the discharging operation can be completed quickly.

further, in the present embodiment, the rear side of the toggle plate seat 17 is hinged to one end of the rear toggle plate 19, and the other end of the rear toggle plate 19 is hinged to the adapter 20; the adapter 20 is provided with a guide piece 25, and the guide piece 25 is matched with a guide hole on the baffle 16 and penetrates through the guide hole on the baffle 16; the baffle 16 is connected with an adjusting bolt 21 through threads, and the end of the adjusting bolt 21 is in contact with the adapter 20 or the adjusting bolt 21 is connected with the adapter 20 through threads.

Therefore, during actual operation, the displacement of the adapter 20 relative to the baffle 16 can be adjusted by adjusting the feeding amount of the bolt 21, and the size of the discharge hole at the lower part of the double-acting jaw crusher can be adjusted by the mutually hinged connecting structure among the rear toggle plate 19, the toggle plate seat 17 and the front toggle plate 18.

Further, in the present embodiment, the stationary jaw 2, the first movable jaw 3 and the second movable jaw 4 are sequentially arranged from front to back on the frame 1, wherein the stationary jaw 2 and the first movable jaw 3 are relatively arranged in an inverted "eight" shape, so that the cross-sectional area of the crushing cavity 24 is correspondingly sequentially reduced from top to bottom.

In addition, the frame 1 is further provided with the side protection plates 26 positioned at the left side and the right side of the crushing cavity 24, so that when the double-acting jaw crusher shown in the embodiment crushes materials, the side wall of the crushing cavity 24 is of a closed structure formed by the front and back arranged static jaw parts 2, the first movable jaw part 3 and the two side protection plates 26 arranged at the left side and the right side, the crushed materials can only be discharged from the discharge hole, and the materials are effectively prevented from escaping from the crushing cavity 24 in the crushing working process.

Further, this embodiment is equipped with quiet jaw tooth board 22 on quiet jaw 2, is equipped with on first movable jaw 3 and moves jaw toothed plate 23, and quiet jaw tooth board 22 and move jaw toothed plate 23 mutual disposition constitute crushing chamber 24 between the two to implement crushing operation to the material.

Furthermore, in the present embodiment, the ratio of the eccentricity of the second eccentric shaft 6 to the first eccentric shaft 5 is 1 to 3, wherein the eccentricity of the first eccentric shaft 5 is 10 to 30 mm; the gear ratio of the driving gear 7 to the driven gear 8 is 1-2.

Specifically, in actual operation, the first movable jaw 3 obtains power from the rotation driving mechanism through the first eccentric shaft 5, and the first eccentric shaft 5 and the second eccentric shaft 6 make the upper ends of the first movable jaw 3 and the second movable jaw 4 synchronously make centrifugal motions with opposite rotation directions through the transmission action between the driving gear 7 and the driven gear 8.

In the transmission process, the tooth numbers of the driving gear 7 and the driven gear 8 can be designed correspondingly according to the transmission requirement or the crushing requirement. When the number of teeth of the driving gear 7 is the same as that of the driven gear 8, the same torque can be obtained by the first movable jaw 3 and the second movable jaw 4. Also can make driven gear 8's number of teeth be greater than the number of teeth of driving gear 7, the gear ratio of driving gear 7 and driven gear 8 is 1 ~ 2 promptly, and this can make the second move the in-process that jaw portion 4 made centrifugal motion under the drive of second eccentric shaft 6, obtain great centrifugal rotational speed.

In order to make the acting force between the first movable jaw part 3 and the second movable jaw part 4 mutually overlap, the second eccentric shaft 6 corresponding to the second movable jaw part 4 is designed to be a positive eccentric as shown in fig. 3, and the first eccentric shaft 5 corresponding to the first movable jaw part 3 is designed to be a negative eccentric as shown in fig. 3, wherein the axes of the central shafts of the first eccentric shaft 5 and the second eccentric shaft 6 are arranged on a horizontal plane with the same height, and the eccentricity e of the first eccentric shaft 5 is₁The eccentricity e of the second eccentric shaft 6₂Eccentricity of e₂Can be designed to have an eccentricity e according to the transmission requirement₁In a different sense, i.e. e₂＝β×e₁Wherein the size of beta is 1-3.

When the first movable jaw part 3 and the second movable jaw part 4 synchronously perform centrifugal motion with opposite rotation directions, the first eccentric shaft 5 corresponding to the first movable jaw part 3 performs eccentricity e around the central shaft thereof₁Thereby causing the movable jaw toothed plate 23 on the first movable jaw 3 to make a periodic oscillating movement.

When the first eccentric shaft 5 downwards rotates anticlockwise from +90 degrees to-90 degrees, the movable jaw toothed plate 23 moves towards the fixed jaw part 2, so that the size of the crushing cavity 24 is reduced, and the materials in the crushing cavity 24 are extruded to finish crushing operation; meanwhile, the second movable jaw 4 moves clockwise from-90 degrees to +90 degrees from the top by the second eccentric shaft 6, and applies a thrust force to the first movable jaw 3 in the same direction as the crushing force through the front toggle plate 18, thereby enhancing the crushing effect.

When the first eccentric shaft 5 moves upwards and anticlockwise to +90 degrees from-90 degrees, the movable jaw toothed plate 23 is far away from the static jaw part 2, so that the discharging operation is completed; meanwhile, the second movable jaw 4 moves downwards clockwise from +90 degrees to a-90 degrees position under the driving of the second eccentric shaft 6, and applies a force to the first movable jaw 3 in the same swinging direction of the first movable jaw through the front toggle plate 18, so that the discharging speed is improved.

Therefore, when the crusher is used for crushing, the double-movable jaw crusher is under the periodical opposite centrifugal motion of the two movable jaws and through the interaction with the static jaw part 2, the crushing effect and the discharging speed of materials are obviously improved, and the working efficiency of the crusher is greatly improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.