CN115364934A

CN115364934A - Stone crushing device

Info

Publication number: CN115364934A
Application number: CN202210922456.8A
Authority: CN
Inventors: 史小华; 梁星; 常春峰; 王雅静; 朱焕文; 唐华辉
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-11-22
Anticipated expiration: 2042-08-02
Also published as: CN115364934B

Abstract

The invention provides a stone crushing device which comprises a screening assembly, a transmission assembly, a main frame, an upper crushing assembly, a lower crushing assembly, a fixed roller assembly and a hydraulic cylinder, wherein the screening assembly is positioned at one end, close to the transmission assembly, of the upper crushing assembly, an upper bottom plate of the upper crushing assembly is rotatably connected with the main frame through the hydraulic cylinder, the lower crushing assembly is positioned below the upper crushing assembly, a lower bottom plate of the lower crushing assembly is rotatably connected with an upper bottom plate of the upper crushing assembly, the lower crushing assembly is fixedly arranged on the main frame, and the output end of the transmission assembly is provided with the fixed roller assembly. The crushing device provided by the invention realizes step-by-step crushing by arranging the screening component and the crushing component, solves the problem of uneven granularity caused by feeding, adopts a combined design of the double moving rollers and the fixed rollers, adjusts the distance between the double moving rollers and the fixed rollers by the hydraulic cylinder, improves the crushing efficiency of stone materials, adopts a modular design as a whole, and is convenient for subsequent disassembly and maintenance.

Description

Stone crushing device

Technical Field

The invention relates to the field of stone crushing, in particular to a stone crushing device.

Background

Sandstone and cement are used as basic materials with the largest consumption in the engineering construction process, are often used as concrete raw materials to be widely applied to the fields of building construction and capital construction, and are also important components of foundations of roads and railways. With the continuous expansion of the economic development scale of China, the demand of mineral resources is continuously increased, and the quantity of minerals needing to be crushed is also rapidly increased. In national economic development, mineral processing plays an important role in the development of the whole society. According to statistics of relevant data, in all mineral processing in the world, about 40% -60% of the electric energy consumption in the whole mineral processing process is used for crushing and grinding, and the electric energy used for crushing materials accounts for about 15% of the total electric energy consumption and is increased every year. Along with the increasingly prominent problem of world energy shortage, the improvement of the energy utilization rate is very important, and the research and development of efficient and energy-saving crushing equipment becomes a necessary choice.

In fact, crushers for fine grades in mountain stone, i.e. generally for feeding 5-30mm, discharging less than 5mm, are mainly ball mills, double-roll crushers.

The main advantages and disadvantages of the current ball mill are as follows:

the advantages are that: 1. the grinding ratio is large, the operation is simple and convenient, and the fineness of the product is easy to adjust; 2. the method can work under different conditions, has strong adaptability, and can be used for dry production and wet production; 3. the equipment operates stably and can operate continuously for a long time. The disadvantages are as follows: 1. the working efficiency is low, and the electric energy consumption is large; 2. the production cost is high, and the consumption of iron plates is huge; 3. the arrangement of the reduction gear is too expensive; 4. heavy size, inconvenient transportation and higher one-time investment cost.

The advantages and disadvantages of the current pair of roller crushers are as follows:

the advantages are that: 1. the occupied area is small, the volume is small, so that the transportation is more convenient, and the transportation cost is lower; 2. the dust generated during production is less, the noise is low, and the environmental pollution is low; 3. the roller of the double-roller crusher is made of high-abrasion-resistance materials, so that the abrasion resistance is high, and the service life is longer; the disadvantages are that: 1. the double-roller sand making machine belongs to small-sized sand making equipment, and has low production efficiency and low processing capacity; 2. the outer surface of the roller is easy to wear, so that the gap between the two rollers is large, the granularity of the product is not uniform, and the product needs to be frequently repaired.

Therefore, how to solve the problems of low stone crushing production efficiency, high energy consumption, uneven granularity of stone finished products and the like in the prior art becomes an important technical problem to be solved by technical personnel in the field.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a stone crushing device, which is characterized in that a screening assembly and a crushing assembly are arranged, stone is screened and then sequentially crushed step by step through a first crushing stage and a second crushing stage, the first crushing stage and the second crushing stage respectively correspond to the working stages of an upper driven roller and a lower driven roller, and the upper driven roller and the lower driven roller can move through a hydraulic cylinder, so that the distance between the upper driven roller and a fixed roller is changed, the stone crushing efficiency is improved, the whole structure adopts a modular design, the maintenance is more convenient, and meanwhile, a single motor is adopted to drive the fixed roller, so that the energy loss is reduced.

The invention provides a crushing device for stone materials, which comprises a screening assembly, a transmission assembly, a main frame, an upper crushing assembly, a lower crushing assembly, a fixed roller assembly and a hydraulic cylinder, wherein the screening assembly is positioned at one end, close to the transmission assembly, of the upper crushing assembly, the upper bottom plate of the upper crushing assembly is rotatably connected with the main frame through the hydraulic cylinder, the lower crushing assembly is positioned below the upper crushing assembly, the lower bottom plate of the lower crushing assembly is rotatably connected with the upper bottom plate of the upper crushing assembly, the lower crushing assembly is fixedly installed on the main frame, the output end of the transmission assembly is provided with the fixed roller assembly, the transmission assembly comprises a motor, a motor base, a first universal joint, a second universal joint, a third universal joint, a speed reducer base and a coupler, the motor is fixedly installed on the motor base, the output shaft of the motor is connected with the first end of the first universal joint, the second end of the first universal joint is connected with the first end of the second universal joint, the second end of the second universal joint is connected with the first end of the speed reducer, and the second end of the speed reducer is fixedly installed on the base; the upper crushing assembly comprises an upper base plate, an upper vertical plate, an upper hydraulic cylinder, an upper spring group, a first spring seat, a second spring seat, an upper sliding rail, an upper supporting arm, an upper driven roller, an upper bearing seat and an upper sliding block, wherein the upper vertical plate is vertically arranged on the upper base plate, the first end of the upper hydraulic cylinder is arranged in the lug seat of the upper vertical plate and is rotatably connected with the upper sliding rail, the second end of the upper hydraulic cylinder is arranged in the lug seat at the bottom end of the first spring seat and is rotatably connected with the lug seat, the first spring seat is connected with the second spring seat through the upper spring group, the upper sliding rail is symmetrically arranged on two sides of the first spring seat, the upper sliding rail is fixedly arranged on the upper base plate, the upper sliding blocks are symmetrically arranged at the bottoms of the first spring seat and the second spring seat, the first spring seat and the second spring seat are slidably connected with the upper sliding rail through the upper sliding block to realize reciprocating movement on the upper base plate, the first end of the upper supporting arm is rotatably connected with the lug seat, the second end of the upper supporting arm is rotatably connected with the upper bearing seat, and the upper bearing seat is respectively connected with the two ends of the driven roller through the upper bearing seat.

Further, the screening subassembly, it includes feed inlet, screening case, screening frame and discharge gate, feed inlet fixed mounting be in screening case top, the screening case sets up in the screening frame, screening bottom of the case end opening part is equipped with the discharge gate.

Further, the lower crushing assembly comprises a lower bottom plate, a lower vertical plate, a lower hydraulic cylinder, a lower spring group, a third spring seat and a fourth spring seat, wherein the lower vertical plate is vertically arranged below the lower bottom plate, the first end of the lower hydraulic cylinder is arranged in the lug seat of the lower vertical plate and is rotatably connected with the lug seat, the second end of the lower hydraulic cylinder is arranged in the lug seat at the bottom end of the third spring seat and is rotatably connected with the lug seat, and the third spring seat is connected with the fourth spring seat through the lower spring group.

Further, lower broken subassembly still includes lower slide rail, lower slider, lower support arm, lower driven voller, lower bearing and step, the slide rail symmetry sets up down the third spring holder both sides, just slide rail fixed mounting is in on the lower plate, the lower slider is installed to the equal symmetry in first spring holder and second spring holder bottom, first spring holder and second spring holder pass through the sliding connection of lower slider and lower slide rail realizes reciprocating motion on the lower plate, the first end of lower support arm with the ear seat of second spring holder rotates and is connected, the second end of lower support arm with the step rotates and is connected, the both ends of lower driven voller respectively through the lower bearing with the step rotates and is connected.

Preferably, the fixed roll assembly comprises a fixed roll, a bearing and a bearing seat, two ends of the fixed roll are respectively rotatably connected with the bearing seat through the bearing, and the bearing seat is fixedly installed on the main frame.

Preferably, the output end of the coupling in the transmission assembly is connected with the fixed roller of the fixed roller assembly.

Preferably, the first universal joint, the second universal joint and the third universal joint in the transmission assembly are all connected through cross shafts.

Compared with the prior art, the invention has the following characteristics:

1. the screening assembly in the crushing device solves the problem of uneven granularity caused by feeding, and the upper driven roller and the lower driven roller can move by arranging the hydraulic cylinder, so that the distance between the screening assembly and the fixed roller is changed, and the stone crushing efficiency is improved.

2. The crushing device is driven by a single motor, the problem of energy loss is solved, meanwhile, a double-movable-roller and single-fixed-roller structure is adopted, step-by-step crushing is realized, and in addition, the problem of inconvenient maintenance and disassembly is solved due to the overall adoption of a modular design.

3. The crushing assembly in the crushing device provided by the invention adopts the hydraulic cylinder and the spring assembly to apply pressure in a mixing manner, can accurately provide pressure, and has the advantages of simple structure and high reliability.

Drawings

Fig. 1 is an overall configuration view of a stone crushing apparatus according to the present invention;

fig. 2 is a structural view of a screening assembly in the crushing apparatus for stone according to the present invention;

fig. 3 is a structural view of a driving assembly in the stone crushing apparatus according to the present invention;

fig. 4 is a block diagram of an upper crushing assembly in the stone crushing apparatus according to the present invention;

fig. 5 is a block diagram of a lower crushing unit in the stone crushing apparatus according to the present invention;

fig. 6 is a structural view of a fixed roller assembly and a main frame in the stone crushing apparatus according to the present invention.

The main reference numbers:

the screening device comprises a screening component 1, a feeding port 11, a screening box 12, a screening rack 13, a discharging port 14, a transmission component 2, a motor 21, a motor base 22, a first universal joint 23, a second universal joint 24, a third universal joint 25, a speed reducer 26, a speed reducer base 27, a coupler 28, a main frame 3, an upper crushing component 4, an upper bottom plate 41, an upper vertical plate 42, an upper hydraulic cylinder 43, an upper spring set 44, a first spring seat 45, a second spring seat 46, an upper slide rail 47, an upper support arm 48, an upper driven roller 49, an upper bearing seat 410, an upper bearing seat 411, an upper sliding block 412, a lower crushing component 5, a lower bottom plate 51, a lower vertical plate 52, a lower hydraulic cylinder 53, a lower spring set 54, a third spring seat 55, a fourth spring seat 56, a lower slide rail 57, a lower support arm 58, a lower driven roller 59, a lower bearing 510, a lower bearing 511, a lower bearing seat 512, a fixed roller component 6, a fixed roller 61, a bearing 62, a bearing 63 and a hydraulic cylinder 7.

Detailed Description

The invention will be described in detail with reference to the drawings for carrying out the invention.

The stone crushing device is preferably used for crushing medium-fine grade stones, and can also be used for crushing other grade stones according to requirements. As shown in fig. 1, the stone crushing device of the invention comprises a screening assembly 1, a transmission assembly 2, a main frame 3, an upper crushing assembly 4, a lower crushing assembly 5, a fixed roller assembly 6 and a hydraulic cylinder 7, wherein the screening assembly 1 is positioned at one end of the upper crushing assembly 4 close to the transmission assembly 2, an upper bottom plate 41 of the upper crushing assembly 4 is rotatably connected with the main frame 3 through the hydraulic cylinder 7, the hydraulic cylinder 7 drives the upper crushing assembly 4 to rotate, so that the angle of the upper crushing assembly 4 is changed, and further the distance between an upper driven roller 49 and a fixed roller 61 is adjusted, the lower crushing assembly 5 is positioned below the upper crushing assembly 4, a lower bottom plate 51 of the lower crushing assembly 5 is rotatably connected with the upper bottom plate 41 of the upper crushing assembly 4, the lower crushing assembly 5 is fixedly installed on the main frame 3, and the output end of the transmission assembly 2 is provided with the fixed roller assembly 6.

As shown in fig. 2, screening subassembly 1 includes feed inlet 11, screening case 12, screening frame 13 and discharge gate 14, feed inlet 11 fixed mounting is in screening case 12 top, screening case 12 sets up on screening frame 13, screening case 12 adopts vibratory screening, filter out the not conform to requirement's building stones size and shape, solved the inhomogeneous problem of finished product granularity because of the feed produces, also avoided simultaneously because of the excessive wearing and tearing of building stones texture reason to the running roller, screening case 12 bottom opening part is equipped with discharge gate 14.

As shown in fig. 3, the transmission assembly 2 includes a motor 21, a motor base 22, a first universal joint 23, a second universal joint 24, a third universal joint 25, a speed reducer 26, a speed reducer base 27 and a coupling 28, the motor 21 is fixedly mounted on the motor base 22, an output shaft of the motor 21 is connected with a first end of the first universal joint 23, a second end of the first universal joint 23 is connected with a first end of the second universal joint 24, a second end of the second universal joint 24 is connected with a first end of the third universal joint 25, a second end of the third universal joint 25 is connected with a first end of the speed reducer 26, and the first universal joint 23, the second universal joint 24 and the third universal joint 25 are all connected through a cross shaft. The second end of the speed reducer 26 is connected with the coupler 28, the speed reducer 26 is fixedly installed on the speed reducer base 27, and the output end of the coupler 28 in the transmission assembly 2 is connected with the fixed roller 61 of the fixed roller assembly 6.

As shown in fig. 4, the upper crushing assembly 4 includes an upper base plate 41, an upper vertical plate 42, an upper hydraulic cylinder 43, an upper spring set 44, a first spring seat 45, a second spring seat 46, an upper slide rail 47, an upper support arm 48, an upper driven roller 49, an upper bearing 410, an upper bearing seat 411 and an upper slide block 412, the upper vertical plate 42 is vertically disposed on the upper base plate 41, a first end of the upper hydraulic cylinder 43 is disposed in and rotatably connected with an ear seat of the upper vertical plate 42, a second end of the upper hydraulic cylinder 43 is disposed in and rotatably connected with an ear seat at a bottom end of the first spring seat 45, the upper hydraulic cylinder 43 pushes the upper spring set 44 to further push the upper driven roller 49 to move, the first spring seat 45 is connected with the second spring seat 46 through the upper spring set 44, during the operation of the crushing device, the upper spring set 44 can avoid foreign matters, the crushing device has the advantages that foreign matters are prevented from entering between the two rollers and causing damage to the roller surface and generating large impact, the upper sliding rails 47 are symmetrically arranged on two sides of the first spring seat 45, the upper sliding rails 47 are fixedly mounted on the upper base plate 41, the upper sliding blocks 412 are symmetrically mounted at the bottoms of the first spring seat 45 and the second spring seat 46, the first spring seat 45 and the second spring seat 46 are connected with the upper sliding rails 47 through the upper sliding blocks 412 to realize reciprocating movement on the upper base plate 41, the first end of the upper supporting arm 48 is rotatably connected with the lug of the second spring seat 46, the second end of the upper supporting arm 48 is rotatably connected with the upper bearing seat 411, the upper supporting arm 48 is used for supporting the upper driven roller 49, and two ends of the upper driven roller 49 are rotatably connected with the upper bearing seat 411 through the upper bearing 410 respectively in the working process.

As shown in fig. 5, the lower crushing assembly 5 includes a lower base plate 51, a lower vertical plate 52, a lower hydraulic cylinder 53, a lower spring group 54, a third spring seat 55, a fourth spring seat 56, a lower slide rail 57, a lower support arm 58, a lower driven roller 59, a lower bearing 510, a lower bearing seat 511 and a lower slider 512, the lower vertical plate 52 is vertically disposed on the lower base plate 51, a first end of the lower hydraulic cylinder 53 is disposed in and rotatably connected with an ear seat of the lower vertical plate 52, a second end of the lower hydraulic cylinder 53 is disposed in and rotatably connected with an ear seat at the bottom end of the third spring seat 55, the lower hydraulic cylinder 53 pushes the lower driven roller 59 to move by pushing the lower spring group 54, the third spring seat 55 is connected with the fourth spring seat 56 by the lower spring group 54, the lower spring group 54 can play a role of buffer protection, the lower slide rail 57 is symmetrically disposed at two sides of the third spring seat 55, the lower slide rail 57 is fixedly mounted on the lower base plate 51, the lower slide rail 55 and the fourth spring seat 56 are symmetrically mounted on the lower base plate 51, the lower spring seat 55 and the lower spring seat 58 are connected with the lower support arm 511 by the lower bearing seat 58, the lower support arm 511, the lower bearing seat 58 is connected with the lower slider 512, the lower support arm 511, and the lower follower arm 511, and the lower bearing seat 58, and the lower follower arm 511 are connected with the lower spring seat 58, and the lower slider 512, and the lower spring seat 58, and the lower follower arm 511, and the lower spring seat 512, and the lower spring seat 58, and the lower bearing device are connected with the lower bearing device in a reciprocating arm in the lower bearing seat 5.

As shown in fig. 6, the fixed roller assembly 6 includes a fixed roller 61, a bearing 62 and a bearing seat 63, two ends of the fixed roller 61 are rotatably connected with the bearing seat 63 through the bearing 62, respectively, and the bearing seat 63 is fixedly installed on the main frame 3.

The crushing device for medium and fine grade stones of the invention is further described with reference to the following examples:

1. screening out stones meeting the crushing requirement

The stone material enters the screening box 12 from the feeding port 11 of the screening component 1, the screening box 12 filters the stone material which does not conform to the crushing shape and size through vibration screening, and the stone material which conforms to the crushing shape and size is output through the discharging port 14, so that the problem of uneven granularity of finished products caused by feeding is solved.

2. Pressure generation between the two driven and fixed rollers 61 (the crushing unit 4 is exemplified above)

The working pressure between the upper driven roller 49 and the fixed roller 61 is provided by the upper spring set 44, the pressure of the upper spring set 44 is generated by the upper hydraulic cylinder 43, the pressure generated by the upper hydraulic cylinder 43 compresses the upper spring set 44, the pressure generated by the upper spring set 44 is transmitted to the upper driven roller 49 through the upper support arm 48, the upper sliding block 412 fixed on the upper bearing seat 411 enables the upper driven roller 49 to horizontally slide along the direction of the upper bottom plate 41 through the upper sliding rail 47, the upper driven roller 49 and the fixed roller 61 keep a reasonable distance, the stability of a gap between the two rollers is ensured, and therefore the stable material layer thickness is generated.

3. Adjustment of the angle between the upper driven roller 49 and the fixed roller 61

The driving force for adjusting the angle between the upper driven roller 49 and the fixed roller 61 comes from the hydraulic cylinder 7, two ends of the hydraulic cylinder 7 are fixedly connected with the first ends of the upper bottom plate 41 and the lower bottom plate 51 respectively, the second ends of the upper bottom plate 41 and the lower bottom plate 51 are fixedly connected, when the angle between the upper driven roller 49 and the fixed roller 61 needs to be adjusted, the angle is adjusted through the telescopic hydraulic cylinder 7, and the crushing efficiency is effectively improved.

4. Transmission of power of the fixed roller 61

The driving force of the fixed roller 61 is derived from the motor 21 arranged in the transmission component 2, the output shaft of the motor 21 is fixedly connected with the first universal joint 23, the first universal joint 23 is fixedly connected with the second universal joint 24 through a cross shaft, the second universal joint 24 is fixedly connected with the third universal joint 25 through a cross shaft, the second end of the third universal joint 25 is fixedly connected with the input end of the speed reducer 26, the output end of the speed reducer 26 is fixedly connected with the input shaft of the coupling 28, the output shaft of the coupling 28 is fixedly connected with the input shaft of the fixed roller 61, the fixed roller 61 drives the stone to move along with the roller surface through extrusion, the stone drives the two driven rollers to rotate through friction force, the two driven rollers are in a follow-up state, and the two driven rollers are not driven. The motor 21 arranged in the transmission assembly 2 is fixedly connected with the speed reducer 26 through a universal joint, so that the transmission is stable, the efficiency is high, the gap impact is small, the transmission torque is large, and the larger crushing pressure of the roller wheel in the crushing process is ensured.

According to the stone crushing device, stones enter from the feeding hole 11 of the screening assembly 1 and are firstly screened by the screening box 12 arranged in the screening assembly 1, the screening box 12 is screened by vibration, the device can screen out stones which do not meet the requirements in advance, in addition, stones with irregular shapes are avoided, the problem of uneven granularity of finished products caused by feeding is solved, excessive abrasion of rollers due to stone texture is avoided, the screened stones enter between the fixed roller 61 and the upper driven roller 49 through the discharging hole 14 of the screening device 1, and the materials begin to be crushed. In the process of crushing stone, two movable rollers, namely an upper driven roller 49 and a lower driven roller 59 and a fixed roller 61 structure are adopted, the two movable rollers (the upper driven roller 49 and the lower driven roller 59) are reasonably distributed, the distance between the two movable rollers (the upper driven roller 49 and the lower driven roller 59) and the fixed roller 61 can be adjusted according to requirements, the upper driven roller 49 can be subjected to angle adjustment with the fixed roller 61 through a hydraulic cylinder 7, the crushing requirement is met by utilizing the principle of step-by-step crushing, a composite pressing device is adopted for working pressure between the two movable rollers (the upper driven roller 49 and the lower driven roller 59) and the fixed roller 61, the crushing assembly 4 is taken as an example, higher pressure can be accurately provided for an upper spring set 44 through an upper hydraulic cylinder 43, so that the upper spring set 44 can avoid foreign matters, the foreign matters can be prevented from entering between the two rollers to cause damage to a roller surface and generate large impact, the driving force for driving the fixed roller 61 in the crushing process comes from a motor 21 arranged in a transmission assembly 2, the energy loss is lower, the two movable rollers (the upper roller 49 and the lower roller 59) are not driven, the stone equipment structure is greatly simplified, and the reliability of the driven roller device is improved. In the aspect of later maintenance, because the structure adopts modular design, make fixed roller 61 install on main frame 3, two movable rollers (last driven roller 49, lower driven roller 59) are also installed on different bottom plates (upper plate 41, lower plate 51), when a movable roller breaks down and needs the maintenance, carry out direct maintenance through flexible pneumatic cylinder (upper hydraulic cylinder 43, lower pneumatic cylinder 53), another movable roller can continue work, effectively improve its crushing efficiency, also solved simultaneously and maintained the inconvenient problem of dismantlement.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. The crushing device for the stone materials is characterized by comprising a screening assembly, a transmission assembly, a main frame, an upper crushing assembly, a lower crushing assembly, a fixed roller assembly and a hydraulic cylinder, wherein the screening assembly is positioned at one end, close to the transmission assembly, of the upper crushing assembly, an upper bottom plate of the upper crushing assembly is rotatably connected with the main frame through the hydraulic cylinder, the lower crushing assembly is positioned below the upper crushing assembly, a lower bottom plate of the lower crushing assembly is rotatably connected with an upper bottom plate of the upper crushing assembly, the lower crushing assembly is fixedly installed on the main frame, the fixed roller assembly is arranged at the output end of the transmission assembly,

the transmission assembly comprises a motor, a motor base, a first universal joint, a second universal joint, a third universal joint, a speed reducer base and a coupler, the motor is fixedly mounted on the motor base, an output shaft of the motor is connected with a first end of the first universal joint, a second end of the first universal joint is connected with a first end of the second universal joint, a second end of the second universal joint is connected with a first end of the third universal joint, a second end of the third universal joint is connected with a first end of the speed reducer, a second end of the speed reducer is connected with an input end of the coupler, and the speed reducer is fixedly mounted on the speed reducer base;

the upper crushing assembly comprises an upper base plate, an upper vertical plate, an upper hydraulic cylinder, an upper spring group, a first spring seat, a second spring seat, an upper sliding rail, an upper supporting arm, an upper driven roller, an upper bearing seat and an upper sliding block, wherein the upper vertical plate is vertically arranged on the upper base plate, the first end of the upper hydraulic cylinder is arranged in the lug seat of the upper vertical plate and is rotatably connected with the upper sliding rail, the second end of the upper hydraulic cylinder is arranged in the lug seat at the bottom end of the first spring seat and is rotatably connected with the lug seat, the first spring seat is connected with the second spring seat through the upper spring group, the upper sliding rail is symmetrically arranged on two sides of the first spring seat, the upper sliding rail is fixedly arranged on the upper base plate, the upper sliding blocks are symmetrically arranged at the bottoms of the first spring seat and the second spring seat, the first spring seat and the second spring seat are slidably connected with the upper sliding rail through the upper sliding block to realize reciprocating movement on the upper base plate, the first end of the upper supporting arm is rotatably connected with the lug seat, the second end of the upper supporting arm is rotatably connected with the upper bearing seat, and the upper bearing seat is respectively connected with the two ends of the driven roller through the upper bearing seat.

2. The stone crushing device as claimed in claim 1, wherein the screening assembly comprises a feeding port, a screening box, a screening rack and a discharging port, the feeding port is fixedly arranged above the screening box, the screening box is arranged on the screening rack, and the discharging port is arranged at the bottom opening of the screening box.

3. The stone crushing device as claimed in claim 1, wherein the lower crushing assembly comprises a lower bottom plate, a lower vertical plate, a lower hydraulic cylinder, a lower spring group, a third spring seat and a fourth spring seat, the lower vertical plate is vertically arranged below the lower bottom plate, a first end of the lower hydraulic cylinder is arranged in the lug seat of the lower vertical plate and is rotatably connected with the lower hydraulic cylinder, a second end of the lower hydraulic cylinder is arranged in the lug seat at the bottom end of the third spring seat and is rotatably connected with the third spring seat, and the third spring seat is connected with the fourth spring seat through the lower spring group.

4. The stone crushing device of claim 1, wherein the lower crushing assembly further comprises a lower slide rail, a lower slider, a lower support arm, a lower driven roller, a lower bearing and a lower bearing seat, the lower slide rail is symmetrically arranged on two sides of the third spring seat, the lower slide rail is fixedly arranged on the lower base plate, the lower slider is symmetrically arranged at the bottoms of the first spring seat and the second spring seat, the first spring seat and the second spring seat are connected with the lower slide rail in a sliding manner to realize reciprocating movement on the lower base plate, the first end of the lower support arm is rotatably connected with an ear seat of the second spring seat, the second end of the lower support arm is rotatably connected with the lower bearing seat, and two ends of the lower driven roller are rotatably connected with the lower bearing seat through the lower bearing respectively.

5. A crushing device for stone materials as claimed in claim 1, wherein the fixed roll assembly comprises a fixed roll, a bearing and a bearing seat, two ends of the fixed roll are respectively and rotatably connected with the bearing seat through the bearing, and the bearing seat is fixedly installed on the main frame.

6. A rock material crushing device according to claim 1 or 5, wherein the output end of the coupling in the transmission assembly is connected with the fixed roll of the fixed roll assembly.

7. The stone crushing device as claimed in claim 1, wherein the first universal joint, the second universal joint and the third universal joint in the transmission assembly are connected by a cross shaft.