WO2020042935A1

WO2020042935A1 - Movable jaw support mechanism and jaw crusher

Info

Publication number: WO2020042935A1
Application number: PCT/CN2019/101056
Authority: WO
Inventors: 朱兴良
Original assignee: 浙江晟达机械有限公司
Priority date: 2018-08-29
Filing date: 2019-08-16
Publication date: 2020-03-05
Also published as: CN111420733A

Abstract

A movable jaw support mechanism and a jaw crusher. The movable jaw support mechanism comprises a stand (1), an eccentric shaft (2) stretching over the stand (1), and a movable jaw (3) pivotally connected to the eccentric shaft (2). The eccentric shaft (2) comprises a connection section (21) and eccentric sections (22), support sections (23), locking sections (24) and transmission sections (25) that are sequentially and symmetrically connected to either end of the connection section (21). Two support parts are symmetrically provided on the stand (1). The support section (23) on each side stretches over the support parts by means of two stand bearings (61). The eccentric section (22) on each side is provided with two movable jaw bearing (71) for mounting the movable jaw (3). Therefore, the bending torsion received by the eccentric shaft (2) can be effectively dispersed, thereby improving the bending prevention capability of the eccentric shaft (2).

Description

Moving jaw support mechanism and jaw crusher

Technical field

The invention belongs to the technical field of mining machinery, and relates to a jaw crusher, in particular to a movable jaw support mechanism.

Background technique

Jaw crusher is widely used in mining, smelting, construction and many other industries due to its simple structure, reliable work, convenient use and maintenance. The jaw crusher is mainly composed of a frame, a fixed jaw, a movable jaw, and an eccentric shaft. The frame is a four-wall rigid frame with upper and lower openings. It is used to support the eccentric shaft and to bear the reaction force of the crushed materials. It requires sufficient strength and Stiffness; the eccentric shaft is the main axis of the crusher, which drives the movement of the jaw and is subjected to huge bending moments. It is made of high-carbon steel. The crushing cavity is formed between the fixed jaw and the moving jaw. The moving jaw is approached or moved away by the eccentric shaft. The fixed jaw crushes the mineral. The existing movable jaw support mechanism is provided with two pairs of bearings. One pair of bearings is installed between the frame and the eccentric shaft, which is usually called a frame bearing. The frame bearing supports the eccentric shaft to perform rotary motion. Between the jaw and the eccentric shaft, it is usually called a movable jaw bearing, which supports the movable jaw to perform a swinging movement when the eccentric shaft rotates, so that the movable jaw is driven by the eccentric shaft to approach or move away from the fixed jaw to crush the mineral.

The work of breaking the moving jaw is driven by the high-speed operation of the eccentric shaft. The eccentric shaft is supported by two frame bearings provided at both ends. Due to the large span of the support point, the deformation of the eccentric shaft is large, and the contact area between the eccentric shaft and the frame is relatively small. The eccentric shaft has high requirements on the rigidity and strength of the eccentric shaft. During the high-speed operation, the eccentric shaft is subjected to a large bending moment force, and it must bear the weight of the entire movable jaw. Its radial load is greater than the shaft. It is easy to deform or break under load. The stronger the jaw crusher's processing capacity, the higher the rigidity and strength requirements of its corresponding eccentric shaft. At present, the method of thickening the eccentric shaft is generally used to increase the rigidity of the eccentric shaft, but this solution will greatly increase the consumables, weight and volume of the eccentric shaft, and the installation space will also increase. The volume and bearing capacity of the rack need to be increased accordingly, so the manufacturing cost, weight and volume of the whole machine will increase greatly. For example, the model of the jaw crusher is usually defined by the size of its feed port, reflecting its size. Processing capacity. When the size of the inlet of the jaw crusher is 600 * 900, the weight of the whole machine is 16T. When the size of the inlet of the jaw crusher is only increased to 750 * 1060, the weight of the whole machine is greatly increased to 28T. Therefore, increasing the rigidity and strength of the eccentric shaft by thickening the eccentric shaft will greatly increase the weight and volume of the whole machine, and greatly increase the manufacturing, assembly, and transportation costs.

Summary of the Invention

In order to solve the above technical problems, the present invention provides a movable jaw support mechanism and a jaw crusher. By adding bearings, the support point of the eccentric shaft on the frame and the support point of the movable jaw on the eccentric shaft are reduced, thereby reducing The span of the support points is reduced, the deformation of the eccentric shaft is reduced, and the bearing area of the eccentric shaft is increased. The bending moment force received by the eccentric shaft is effectively dispersed, and the anti-bending ability of the eccentric shaft is improved.

The object of the present invention can be achieved by the following technical solutions:

A movable jaw support mechanism includes a frame, an eccentric shaft erected on the frame, and a movable jaw pivotally connected to the eccentric shaft. The eccentric shaft includes a connection section and eccentric sections symmetrically connected at both ends of the connection section in sequence. The support section, the lock section, and the transmission section. The axis lines of the support section, the lock section, and the transmission section are located on the rotation center line of the eccentric shaft. The axis line of the eccentric section is located on the entire shaft of the eccentric shaft. On the eccentric center line, two support portions are symmetrically arranged on the frame, and the support sections on each side are erected on the support portion through two frame bearings; two eccentric sections on each side are provided for installation. The movable jaw bearing of the movable jaw includes the movable jaw body and a mounting body on the upper part of the movable jaw body. The mounting body is a hollow structure and is pivotally connected to an eccentric shaft through the movable jaw bearing. The support section of the eccentric shaft is arranged coaxially and cooperates with the support section; the movable jaw bearings are all arranged coaxially with the eccentric section of the eccentric shaft and matched with the eccentric section. By providing two rack bearings on each side of the support section, the contact area between the eccentric shaft and the rack can be increased, the support point can be increased, the support force received by the eccentric shaft can be increased, and the span of the support point can be reduced to reduce the eccentric shaft. The deformation of the eccentric shaft improves the bending resistance of the eccentric shaft. By setting two movable jaw bearings on each side of the eccentric shaft, the contact area between the movable jaw and the eccentric shaft can be increased, the force point can be increased, and the bending moment force on the eccentric shaft can be effectively dispersed ; By adding bearings at the support and installation positions of the eccentric shaft, the bearings can provide effective support for the eccentric shaft and avoid concentrated forces on the eccentric shaft. Even if the eccentric shaft is not thickened, the eccentric shaft can meet the required stiffness and strength. To resist bending.

Preferably, each side support portion is provided with a bearing box for supporting two rack bearings. The bearing box includes a bearing box cover plate and a bearing box base. The bearing box cover plate is detachably connected to the bearing box base. They cooperate to form a shaft hole, and both ends of the eccentric shaft pass through the shaft hole and the frame bearing. The bearing box can provide support for the bearing of the frame, and can fully lubricate it, so that the entire support mechanism is more stable and the operation is more stable; the bearing box adopts a separate and detachable structure, which is conducive to the maintenance and replacement of the bearing.

Preferably, the bearing box base protrudes from the frame and is integrally formed with the frame, and a reinforcing rib is arranged diagonally between the bearing box base and the frame body. The bearing box base and the frame are integrally formed to enable the bearing The connection between the seat and the frame is more firm and reliable, improving the stability of the entire supporting mechanism; the bearing box base is protruding from the frame setting, which can reduce the thickness of the frame, thereby reducing the weight and manufacturing cost of the frame; the bearing box base The reinforcement ribs are arranged obliquely to the frame, which can improve the support force of the frame to the bearing box and improve the stability of the entire supporting mechanism.

Preferably, a bearing spacer is provided between the two frame bearings on the same side, and the two frame bearings are axially positioned and provided with an axial gap to prevent axial displacement of the frame bearings and affect each other.

Preferably, a cooling jacket is provided outside the bearing housing, and forms a cooling cavity with an outer wall of the bearing housing. The rapid operation of the eccentric shaft will heat up the bearing. By setting a cooling liquid in the cooling cavity, the temperature of the bearing can be effectively reduced, the normal operation of the equipment can be guaranteed, and the service life of the bearing can be extended.

Preferably, the connecting section is provided with a cutting plane which is on the same side as the eccentric side of the eccentric section, and the center line of the cutting plane is located at the eccentric center line of the eccentric section and the rotation center line of the support end. The eccentric moment of the connecting section is equal to the eccentric moment of the eccentric section on the plane where the user is located. Usually, the eccentric shaft generates eccentric moment of inertia and is balanced by an externally-set flywheel eccentric balance weight, but the balance weight on the flywheel cannot achieve accurate balance of the eccentric inertia moment, and still generates a large eccentric vibration. In this technical solution, an arc-shaped body is cut on the connecting section to form a cutting plane, so that the center of mass of the connecting section is shifted to the opposite side of the eccentric side of the eccentric section. The determination of the eccentric center distance should meet the eccentric inertia moment balance requirement. The eccentric inertia moment balance formula is: G1 * m1 = G2 * m2, where G1 is the sum of the weights of the two eccentric sections on both sides, m1 is the eccentric center distance, and G2 is the connecting section. Weight, m2 is the eccentric center distance of the connecting section. In this way, the eccentric moment of inertia generated by the connecting section is equal to the eccentric moment of inertia generated by the eccentric section, but in the opposite direction, the self-balance of the eccentric shaft's rotation and the eccentric moment of inertia is achieved, and the precise balance of the eccentric moment of inertia can be achieved, thereby making the eccentricity The bending moment force on the shaft is reduced, and the eccentric vibration is reduced, so that the entire movable jaw support mechanism is more stable and reliable, the operation is more stable, and the service life of each part is extended.

Preferably, a weight piece is provided on the cutting plane, and the weight piece is locked by an adjustment screw hole and an adjustment bolt, and the adjustment screw hole is located on a plane where a center line of the cutting plane is located. During the manufacturing process of the eccentric shaft, the parallelism, eccentricity of the rotation centerline and the eccentric centerline, and the processing size of each section of the eccentric shaft will have more or less errors, which will affect the balance accuracy of the eccentric inertia moment. Therefore, the present invention provides a weight plate for fine adjustment, and the weight plate plays a role of balancing adjustment torque, and the center of mass point of the entire connecting section is adjusted to an optimal position by adding or reducing the weight plate.

Preferably, a fine adjustment hole is provided on the plane center line of the cutting plane. The fine adjustment hole is provided with fine adjustment bolts, and the number of the fine adjustment holes is an odd number. The provided fine adjustment bolt uses the middle fine adjustment hole as a reference on both sides. Symmetrically arranged. The setting of the fine adjustment hole and the fine adjustment bolt can also finely adjust the center of mass of the connecting section to achieve the precise balance of the eccentric moment of inertia, and it is easy to achieve an equal distribution on both sides of the odd number.

The invention also provides a jaw crusher, which includes the above-mentioned movable jaw support mechanism, so that the eccentric shaft can have sufficient rigidity and strength to drive a larger-sized movable jaw without thickening the eccentric shaft, so as to realize a larger processing capacity. And can reduce the weight of the entire jaw crusher, facilitate the transportation and assembly of equipment, and reduce costs and energy consumption.

Preferably, the movable jaw support mechanism is provided with two sets, namely a first movable jaw support mechanism and a second movable jaw support mechanism, and the second movable jaw support mechanism is disposed behind the first movable jaw support mechanism. The rooms are connected by brackets. The second movable jaw support mechanism can increase the force and work of the first movable jaw support mechanism through the toggle plate, so that the crushing capacity of the jaw crusher is stronger and the crushing ratio is improved.

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

1. The movable jaw support mechanism provided by the present invention, the rack bearings are increased from the existing two to four, and the movable jaw bearings are increased from the existing two to four; the eccentric shaft is mounted on the machine through the four rack bearings. On the frame, the support point of the eccentric shaft is increased, so that the eccentric shaft receives a greater supporting force, and the span of the support point is reduced, and the deformation of the eccentric shaft is reduced; the movable jaw is pivotally connected by four movable jaw bearings. On the eccentric shaft, the stress point of the eccentric shaft is increased, the radial load of the eccentric shaft is effectively distributed, and the bending moment force on the eccentric shaft is reduced; the entire eccentric shaft is changed from the current four-point support to the eight-point support. Under the premise of the same load, the bending moment of the eccentric shaft is reduced, so the shaft diameter of the eccentric shaft can be reduced, the assembly space can be correspondingly reduced, the manufacturing cost is reduced, and the equipment weight is reduced to facilitate transportation and assembly.

2. By setting an eccentric shaft with a self-balancing function, the balance block provided on the flywheel can be omitted, and the structure of the device can be simplified; the balance of the eccentric inertia moment can be achieved through the precise design and precise manufacturing of the eccentric shaft itself, and the detection Convenient, you only need to test the eccentric shaft itself, and you don't need to test the crusher. The eccentric shaft is also equipped with a fine-tuning mechanism, which can achieve precise balance of the eccentric inertia moment through fine-tuning, so as to reduce the eccentric shaft. Moment force, while reducing eccentric vibration, making the whole movable jaw support mechanism more stable and reliable, running more smoothly, and prolonging the service life of each part; the present invention eliminates the connection without removing the eccentric shaft shaft diameter Part of the segment realizes the offset of the center of mass of the connecting gear, further reducing the weight of the eccentric shaft.

3. The movable jaw support mechanism disclosed in the present invention has stronger anti-bending ability of the eccentric shaft. The use of the movable jaw support mechanism can enable the jaw crusher to use a eccentric shaft with a smaller shaft diameter to achieve a larger crushing capacity. And throughput. Reduced equipment manufacturing costs and energy consumption, and significantly reduced equipment weight, convenient transportation and assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic structural diagram of a movable jaw support mechanism;

2 is a schematic structural diagram of an eccentric shaft in Embodiment 1 of the present invention;

3 is a schematic structural diagram of an eccentric shaft in Embodiment 2 of the present invention;

4 is a schematic diagram of an eccentric shaft mechanism in Embodiment 3 of the present invention;

Figure 5 is a schematic structural diagram of a jaw crusher;

Figure 6 is a top view of a movable jaw support mechanism in a jaw crusher;

In the figure, 1. frame; 2. eccentric shaft; 21. connection section; 22. eccentric section; 23. support section; 24. locking section; 25. transmission section; 3. movable jaw; 31. movable jaw body; 32. Mounting body; 4. Strengthening rib; 5. Bearing box; 51. Bearing box cover; 52. Bearing box base; 53. End cover; 61. Frame bearing; 62. Bearing spacer; 71. Moving jaw Bearing; 72. Moving jaw bearing cover; 8. Cooling jacket; 81. Cooling cavity; 91. Groove; 92. Flywheel; 211. Counterweight; 212. Adjustment bolt; 213. Fine adjustment hole; 214. Fine adjustment bolt; 26 First eccentric shaft; 27. second eccentric shaft; 33. first movable jaw; 34. second movable jaw; 10. fixed jaw; 11. first movable jaw support mechanism; 12. second movable jaw support mechanism; 13. The first toggle; 14. The second toggle; 15. The connecting rod; 16. The buffer spring.

detailed description

The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

First embodiment, referring to FIGS. 1 and 2, a movable jaw support mechanism includes a frame 1, an eccentric shaft 2 mounted on the frame 1, and a movable jaw 3 and an eccentric shaft 2 pivotally connected to the eccentric shaft 2. Including the connecting section 21 and the eccentric section 22, the supporting section 23, the locking section 24, and the driving section 25 which are sequentially symmetrically connected to both ends of the connecting section 21, the axis lines of the supporting section 23, the locking section 24, and the driving section 25 are located on the eccentric shaft. 2 The axis of rotation of the entire shaft, the axis of the eccentric section 22 is located on the center of the eccentric shaft 2; the frame 1 is provided with two support sections symmetrically, and the support section 23 on each side passes through two machines. A frame bearing 61 is erected on the supporting portion; each side supporting portion is provided with a bearing box 5 for supporting two frame bearings 61. The bearing box 5 includes a bearing box cover 51 and a bearing box base 52, and a bearing box cover 51. It is detachably connected to the bearing box base 52, which cooperates to form a shaft hole. Both ends of the eccentric shaft 2 pass through the shaft hole and the frame bearing 61. The bearing box base 52 is protruded from the frame 1, and is connected with the machine. The frame 1 is integrally formed, and a reinforcing rib 4 is also arranged diagonally between the frame 1 and the body of the frame 1; between two frame bearings 61 on the same side are arranged A bearing spacer 62 is provided; a cooling jacket 8 is provided outside the bearing box 5 and forms a cooling cavity 81 with the outer wall of the bearing box 5, and a cooling liquid is provided in the cooling cavity 81; and an end cover 53 is also provided on the outside of the bearing box 5. The end cover 53 is installed at the locking section 24 on each side of the eccentric shaft 2. The end cover 53 cooperates with the sealing body to seal and protect the bearing box 5 from dust and to axially limit the frame bearing 61 to prevent it from rotating at high speed. Axial displacement occurred during the process. Each eccentric section 22 is provided with two movable jaw bearings 71 for mounting the movable jaw 3. The movable jaw 3 includes a movable jaw body 31 and a mounting body 32 on the upper part of the movable jaw body 31. The mounting body 32 is a hollow structure. The jaw bearing 71 is pivotally connected to the eccentric shaft 2; the four movable jaw bearings 71 are arranged coaxially with the eccentric section 22 of the eccentric shaft 2, the inner ring of which is matched with the eccentric section 22 of the eccentric shaft 2, and its outer ring is connected with the movable jaw 3 The mounting holes of the mounting body 32 are matched, and the outer movable jaw bearing 71 is further provided with a movable jaw bearing cover 72 for axially positioning and sealing the movable jaw bearing 71. The connecting section 21 of the eccentric shaft 2 is located in the mounting hole of the mounting body 32 of the movable jaw 3; two transmission sections 25, one of which is equipped with a grooved wheel 91 and the other is equipped with a flywheel 92.

The second embodiment, referring to FIG. 3, is different from the first embodiment in that the eccentric shaft 2 of the movable jaw support mechanism has a self-balancing function, and a connecting plane 21 of the eccentric shaft 2 is provided with a cutting plane. The cutting plane and the The eccentric side of the eccentric section 22 is on the same side. The center line of the cutting plane is located on the plane where the eccentric center line of the eccentric section 22 and the rotation center line of the support section 23 are located. The eccentric moment of the connecting section 21 and the eccentricity of the eccentric section 22 The moments are equal; a weight plate 211 is also provided on the cutting plane. The weight plate 211 is locked by adjusting the screw hole and the adjusting bolt 212. The adjusting screw hole is located on the plane where the center line of the cutting plane is located. 211 superimposed or reduced to adjust the center of mass of the entire connecting section 21 to an optimal position, so as to achieve an accurate balance of the eccentric moment of inertia.

The third embodiment, referring to FIG. 4, is different from the first embodiment in that three fine adjustment holes 213 are provided on the center line of the cutting plane of the connection section 21. The fine adjustment holes 213 are provided with fine adjustment bolts 214 and the provided fine adjustment bolts. 214 is symmetrically arranged on both sides with the fine adjustment hole 213 in the middle as the reference. The setting of the fine adjustment hole 213 and the fine adjustment bolt 214 can finely adjust the center of mass of the connecting section 21 to achieve the precise balance of the eccentric moment of inertia. .

Embodiment 4 Referring to FIGS. 5 and 6, a jaw crusher includes a first movable jaw support mechanism 11 and a second movable jaw support mechanism 12. The two movable jaw support mechanisms share one frame 1, one front and one It is arranged in the rear, and the number and mounting position of the frame bearing 61 and the movable jaw bearing 71 are the same as those in the first embodiment, and further include a fixed jaw 10 and a toggle plate. The first movable jaw support mechanism 11 includes a first movable jaw 33 and a first eccentric shaft 26. The second movable jaw support mechanism 12 includes a second movable jaw 34 and a second eccentric shaft 27. The first movable jaw 33 and the second movable jaw. A first toggle plate 13 is provided between 34. The front end ball of the first toggle plate 13 is hinged on the first movable jaw 33, and the corresponding other end ball is hinged on the second movable jaw 34. The second movable jaw 34 and A second toggle plate 14 is also provided between the frames 1, the front end ball of the second toggle plate 14 is hinged on the second movable jaw 34, and the corresponding other end ball is hinged on the frame 1, and the fixed jaw 10 is fixedly arranged. On the frame 1, a crushing cavity is formed between the first movable jaw 33 and the fixed jaw 10. The first movable jaw 33 is driven by the first eccentric shaft 26 to crush the mineral near or away from the fixed jaw 10. Driven by the second eccentric shaft 27, the movable jaw 34 pushes the first movable jaw 33 through the first toggle plate 13 to increase the force and work of the first movable jaw 33 to improve the crushing capacity and crushing effect of the jaw crusher. A connecting rod 15 is also connected to the lower end of the rear side of the first movable jaw 33. The connecting rod 15 is connected to the frame 1 through a buffer spring 16. The above buffer device can reduce the inertia of the first movable jaw 33 when it is broken, and better mine Material crushing to improve the crushing effect of jaw crusher.

It should be understood that in the claims and specification of the present invention, all "including" shall be understood as an open-ended meaning, that is, its meaning is equivalent to "including at least ...", and shall not be understood as closed-ended. Meaning, that its meaning should not be interpreted as "contains only ...". The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The directions or positional relationships indicated by the terms "front", "back", "upper", "downward" and the like are based on the positional or positional relationships shown in the drawings, and are for ease of description only, and do not indicate or imply the device referred to Must have a specific orientation or position relationship, so it cannot be understood as a limitation on this application.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention , Should be covered by the scope of protection of the invention.

Claims

A movable jaw support mechanism includes a frame, an eccentric shaft mounted on the frame, and a movable jaw pivotally connected to the eccentric shaft. The eccentric shaft includes a connection section and symmetrically connected in sequence to both ends of the connection section. An eccentric section, a support section, a locking section, and a transmission section. The axis lines of the support section, the locking section, and the transmission section are located on the rotation center line of the entire shaft of the eccentric shaft. The axis line of the eccentric section is located on the eccentric shaft. On the eccentric center line of the entire shaft, two support portions are symmetrically arranged on the frame, and the support sections on each side are erected on the support portions through two frame bearings; two eccentric sections are provided on each side. The movable jaw is used to install a movable jaw. The movable jaw includes a movable jaw body and a mounting body. The mounting body is a hollow structure. The movable jaw is pivotally connected to the eccentric shaft through the movable jaw bearing. The frame bearings are all connected to the eccentric shaft. The support sections are coaxially arranged to cooperate with the support sections; the movable jaw bearings are all arranged coaxially with the eccentric section of the eccentric shaft and matched with the eccentric section.
The movable jaw support mechanism according to claim 1, wherein each side support portion is provided with a bearing box for supporting two rack bearings, and the bearing box comprises a bearing box cover plate and a bearing box The base, the bearing box cover plate and the bearing box base are detachably connected, and the two cooperate to form a shaft hole. Both ends of the eccentric shaft pass through the shaft hole and the frame bearing.
The movable jaw support mechanism according to claim 2, wherein the base of the bearing box protrudes from the frame and is integrally formed with the frame, and a reinforcement is arranged obliquely with the frame body. Ribs.
The movable jaw support mechanism according to claim 2 or 3, wherein a bearing spacer is provided between the two frame bearings on the same side, and the two frame bearings are axially positioned and provided. Axial clearance.
The movable jaw support mechanism according to claim 4, wherein a cooling jacket is provided outside the bearing box, and a cooling cavity is formed with an outer wall of the bearing box, and a cooling liquid is provided in the cooling cavity.
The movable jaw support mechanism according to claim 1, wherein the connecting section is provided with a cutting plane, the cutting plane is on the same side as the eccentric side of the eccentric section, and the center line of the cutting plane is located at On the plane where both the eccentric centerline of the eccentric segment and the rotation centerline of the support segment are located, the eccentric moment of the connecting segment is equal to the eccentric moment of the eccentric segment.
The movable jaw support mechanism according to claim 6, wherein a weight plate is provided on the cutting plane, and the weight plate is locked by an adjusting screw hole and an adjusting bolt, and the adjusting screw hole is located at The plane where the center line of the cutting plane is located.
The movable jaw support mechanism according to claim 6, wherein a fine adjustment hole is provided on a plane center line of the cutting plane, and a fine adjustment bolt is provided in the fine adjustment hole, and the number of the fine adjustment holes is an odd number. The fine adjustment bolts are symmetrically arranged on both sides with the fine adjustment hole in the middle as a reference.
A jaw crusher, comprising the movable jaw support mechanism according to any one of claims 1-8.
The jaw crusher according to claim 9, characterized in that there are two sets of movable jaw support mechanisms, namely a first movable jaw support mechanism and a second movable jaw support mechanism, and a second movable jaw support mechanism It is arranged behind the first movable jaw support mechanism, and the two are connected by a toggle plate.