CN217450941U - Polarization transmission mechanism of composite screen - Google Patents

Abstract

The utility model discloses a polarization transmission mechanism of a composite screen, which comprises a rotating shaft; the end face bearing is fixed with the screen box; the first bearing seat is fixed with the end face bearing; and the rotating shaft penetrates through the end face bearing and the first bearing seat and then is fixed with the polarization assembly. Utility model has avoided lubricating oil to cause the pollution to other parts.

Description

Polarization transmission mechanism of composite screen

Technical Field

The utility model relates to a material screening technical field, concretely relates to polarization drive mechanism of compound sieve.

Background

As shown in fig. 1, CN103658025B discloses a composite relaxation sieve comprising a fixed sieve basket 1, an upper floating sieve basket 2, and a lower floating sieve basket 9, wherein the upper floating sieve basket 2 is connected to an upper eccentric shaft transmission system 4, the upper eccentric shaft transmission system 4 is connected to an upper driving motor 3 through a universal coupling, the lower floating sieve basket 9 is connected to a lower eccentric shaft transmission system 6, the lower eccentric shaft transmission system 6 is connected to a lower driving motor 5 through a universal coupling, a gap between the upper floating sieve basket 2 and the upper eccentric shaft transmission system 4 is formed, set up X respectively to leaf spring 7 between unsteady sieve basket 9 of lower floor and the lower floor eccentric shaft transmission system 6, X is connected through sieve basket link 8 respectively to leaf spring 7 and upper strata unsteady sieve basket 2, the unsteady sieve basket 9 of lower floor between, and fixed sieve basket 1 all is equipped with Z to leaf spring 12 and Y to leaf spring 10 with upper strata unsteady sieve basket 2, the unsteady sieve basket 9 of lower floor between.

As shown in fig. 2, the upper and lower eccentric shaft transmission systems each include an eccentric main shaft 15 penetrating through the fixed screen basket 1, two shaft ends of the eccentric main shaft 15 are eccentric sections 13, one of the eccentric sections 13 of the upper and lower eccentric main shafts is respectively connected to an upper and lower layer driving motor through a universal coupling, a main bearing on the eccentric main shaft 15 is located in a main bearing seat 11, the main bearing seat 11 is connected to the fixed screen basket 1, an eccentric bearing on the eccentric section 13 is located in an eccentric bearing seat 14, and the eccentric bearing seat 14 is connected to the X-direction plate spring 7.

When the composite relaxation sieve is used, the upper layer driving motor 3 and the lower layer driving motor 5 are respectively started, the upper layer driving motor 3 drives the upper layer eccentric shaft transmission system 4 to rotate, the lower layer driving motor 5 drives the lower layer eccentric shaft transmission system 6 to rotate, the eccentric section 13 in the upper layer eccentric shaft transmission system 4 revolves around the axis of the eccentric main shaft 15, the revolution radius is the center distance between the axis of the eccentric main shaft 15 and the axis of the eccentric section 13, the exciting force is transmitted to the floating sieve basket through the X-direction plate spring 7 by the eccentric bearing seat 14, the amplitude of the floating sieve basket is obtained, the floating sieve basket reacts to fix the sieve basket 1, the fixed sieve basket 1 obtains the amplitude, and the sieving action is realized. The Y-direction leaf spring 10, the Z-direction leaf spring 12 and the X-direction leaf spring 7 guide the movement direction of the upper-layer floating screen basket 2 and play a role in damping the movement of the upper-layer floating screen basket.

The composite flip-flow screen has the following defects:

(1) and the upper layer driving motor 3 and the lower layer driving motor 5 are needed during working, so that the cost and the energy consumption are high.

(2) Because the X-direction plate spring 7 is connected with the upper-layer floating sieve basket 2 and the lower-layer floating sieve basket 9 through the sieve basket connecting frame 8 respectively, the exciting force is transmitted to the floating sieve basket through the X-direction plate spring 7 by the eccentric bearing seat 14, so that the floating sieve basket and the fixed sieve basket can only do linear motion, and the screening efficiency is low due to the linear motion.

(3) The outer sides of a main bearing seat 11 and an eccentric bearing seat 14 in an upper-layer eccentric shaft transmission system and a lower-layer eccentric shaft transmission system are both provided with labyrinth structures used for sealing lubricating oil, the lubricating oil adopted in the main bearing seat 11 and the eccentric bearing seat 14 is grease, the grease needs to be supplemented after being consumed in the working process, the lubricating oil is injected, meanwhile, pressure is provided for the bearing seat, the pressure can cause a part of original lubricating oil in the bearing seat to be extruded from the labyrinth structures, the lubricating oil flows to the surfaces of other parts outside the bearing seat, and the surfaces of the parts are polluted.

SUMMERY OF THE UTILITY MODEL

The utility model provides a polarization transmission mechanism of composite screen, the utility model discloses avoided lubricating oil to cause the pollution to other parts.

The technical scheme for solving the problems is as follows:

polarization drive mechanism of compound sieve includes:

a rotating shaft;

the end face bearing is fixed with the screen box;

the first bearing seat is fixed with the end face bearing;

and the rotating shaft penetrates through the end face bearing and the first bearing seat and then is fixed with the polarization assembly.

The utility model discloses in, at first adopt end face bearing to support the countershaft, because end face bearing is from taking seal structure, in the use, need not to annotate lubricating oil separately, consequently, adopt end face bearing not to have the leakage of lubricating oil, avoided lubricating oil to cause the pollution to other parts. Next, in the present embodiment, the polarization component is used as an excitation unit, the polarization component is not connected to the plate spring as described in the background art, and an excitation force is generated by reciprocating pushing and pulling, but the present embodiment uses a centrifugal force generated by the polarization component during rotation as the excitation force.

Drawings

FIG. 1 is a schematic illustration of a composite relaxation screen of the prior art;

FIG. 2 is a schematic view of upper and lower eccentric shaft drive systems in a prior art compound relaxation screen;

fig. 3 is a perspective view of the composite screen of the present invention in a first direction;

fig. 4 is a perspective view of the composite screen of the present invention in a second direction;

fig. 5 is a perspective view of the composite screen of the present invention in a third direction;

FIG. 6 is a cross-sectional view of the polarization actuator with the shield hidden;

FIG. 7 is a perspective view of the polarization actuator with the shield hidden;

FIG. 8 is an enlarged view of portion P of FIG. 3;

FIG. 9 is a perspective view of a cushioning element;

FIG. 10 is a perspective view of a lower screen assembly;

reference numbers in the drawings:

a polarization transmission mechanism A, a rotating shaft 100, an end face bearing 101, a first bearing seat 102, a first shoulder 102a, a screw 103, a connecting seat 104, a shoulder 104a, a polarization block 105, a reinforcing plate 106, a sleeve 107 and a balancing weight 108;

a screen box body B, a feed inlet 110, an upper layer discharge port 111 and a lower layer discharge port 112;

an upper-layer screen assembly C, a first screen 150, first mesh holes 151, bar fingers 152 and a support beam 153;

a lower screen assembly D, a first support member 204, a second support member 205, a second screen 206, a support rod 207, a clamping plate 208;

an elastic supporting mechanism E, a frame 140, a lower support 141, an upper support 142, a support leg 143 and an accommodating cavity 144;

the dynamic propulsion assembly F, the upper fixing base 200, the lower fixing base 201, the buffer element 202, the buffer main body 202a, the connecting portion 202b, the protrusion 202c, and the middle mounting base 203.

Detailed Description

The utility model discloses a compound sieve includes polarization drive mechanism A, sieve case, elastic support mechanism E, and the following explains in detail every part and the relation between each part:

polarization drive mechanism A is fixed with sieve case body B, polarization drive mechanism A includes: the screen box comprises a rotating shaft 100, an end face bearing 101, a first bearing seat 102 and a polarization component, wherein the end face bearing 101 is fixed with a screen box body B, and the first bearing seat 102 is fixed with the end face bearing 101; the rotating shaft 100 passes through the end face bearing 101 and the first bearing seat 102 and is fixed with the polarization component.

In this embodiment, the end face bearing 101 is used to support the rotating shaft 100, and since the end face bearing 101 has a sealing structure, no additional lubricant needs to be added during the use process, so that no lubricant leaks from the end face bearing 101, thereby preventing the lubricant from polluting other parts. Secondly, in this embodiment, the polarization component is used as an excitation unit, the polarization component is not connected to the plate spring as described in the background art, and an excitation force is generated by reciprocating pushing and pulling, but in this embodiment, a centrifugal force generated by the polarization component in a rotation process is used as an excitation force, and the centrifugal force is calculated according to the following formula:

F＝mrw ²

in the above formula, F represents a centrifugal force, m represents a weight of the polarizing member, r represents a radius of the polarizing member, and w represents an angular velocity.

As can be seen from the above, the magnitude of the centrifugal force is related to the weight, radius and angular velocity of the polarizing element, and the magnitude of the centrifugal force can be changed by changing any one of the elements. The maximum exciting force in the background art cannot be changed, and can only be determined by the maximum stroke of the eccentric shaft transmission system.

The polarization component and the rotating shaft 100 are fixed in the circumferential direction and the axial direction, so that the rotating shaft 100 transmits power to the polarization component, the polarization component is prevented from being displaced in the axial direction, the polarization component abuts against the first bearing seat 102, and the polarization component and the first bearing seat 102 are further limited in the axial direction.

The polarization component and the rotating shaft 100 are in spline fit to form circumferential fixation, and the structure can transmit larger torque. The peripheral face of the polarization component is provided with a screw hole, the peripheral face of the rotating shaft 100 is provided with a threaded hole, and the screw penetrates through the screw hole in the polarization component and is in threaded connection with the threaded hole in the rotating shaft 100, so that the polarization component is fixed with the rotating shaft 100. Because one end of the polarization component is abutted against the first bearing seat 102, and the other end of the polarization component is fixed with the rotating shaft through the screw 103, the axial positioning of the polarization component is more reliable.

The polarization component comprises a connecting seat 104 and a polarization block 105 for generating exciting force during rotation, the rotating shaft 100 is fixed with the connecting seat 104, and one end of the polarization block 105 is fixed with the connecting seat 104. The rotating shaft 100 drives the connecting seat 104 to rotate when rotating, the polarizing block 105 rotates along with the connecting seat 104, and since the polarizing block 105 is only connected with the connecting seat 104 and the polarizing block 105 has no other limitation in the circumferential direction, the centrifugal force generated by the polarizing block 105 is the exciting force.

In this embodiment, the polarization block 105 is a cam structure, the shape of the outline of the polarization block 105 preferably adopts a sector shape, a mounting hole is formed in the polarization block 105, the polarization block 105 is fixedly connected with the connecting base 104 after being sleeved on the rotating shaft 100 through the mounting hole, the other end of the polarization block 105 is matched with the first bearing base 102, so that the polarization block 105 is limited between the connecting base 104 and the first bearing base 102, the two ends of the polarization block 105 are respectively axially positioned, and the polarization block 105 is prevented from axially moving in the working process.

The connecting base 104 is provided with a shoulder 104a, and the polarizing block 105 is sleeved on the shoulder 104a and is matched with the shoulder 104 a. Similarly, the first shoulder 102a is disposed on the first bearing seat 102, and the polarization block 105 is sleeved on the first shoulder 102a, so that the two ends of the polarization block 105 are not only axially limited, but also supported respectively, and the position of the polarization block 105 is stable.

The polarization assembly further includes one or more weights 108, the weights 108 being fixed to the polarization block 105. The shape of the weight 108 may be arbitrary, in this embodiment, the shape of the weight 108 is preferably waist-shaped, and after the weight 108 and the polarization block 105 are fixed, a half-surrounding state is formed for the connection seat 104. The number of the balancing weights 108 can be increased or decreased according to the needs, each balancing weight 108 is provided with a through hole, if a plurality of balancing weights 108 are adopted, the balancing weights 108 are superposed on the polarization block 105, and the balancing weights 108 and the polarization block 105 which are superposed together are locked and fixed by screws. The use of different numbers of clump weights 108 will produce different magnitudes of centrifugal force, thus making the excitation forces different.

The polarization transmission mechanism a of this embodiment further includes a reinforcing plate 106 and a sleeve 107, the reinforcing plate 106 is fixed to the end face bearing 101, the sleeve 107 is sleeved on the rotating shaft 100, and an end face of the sleeve 107 is matched with the reinforcing plate 106. The strength of the end face bearing 101 part of the screen box body B can be enhanced through the reinforcing plate 106, and the rotating shaft 100 can be prevented from being impacted by materials falling downwards from the upper screen assembly C in the using process through the shielding effect of the sleeve 107 on the rotating shaft 100.

The screen box comprises a screen box body B, an upper screen assembly C and a lower screen assembly D, wherein a feed inlet 110 is formed in one end of the screen box body B, and an upper discharge outlet 111 and a lower discharge outlet 112 are formed in the other end of the screen box body B. The upper layer screen assembly C and the lower layer screen assembly D are arranged one above the other and are installed in the screen box body B, the feed inlet 110 corresponds to one end of the upper layer screen assembly C, the other end of the upper layer screen assembly C corresponds to the upper layer discharge port 111, and the lower layer screen assembly D corresponds to the lower layer discharge port 112.

The material is carried upper screen assembly C through feed inlet 110, and after the screening in upper screen assembly C, partly material falls on lower floor's screen assembly D, and another part material is exported through upper discharge gate 111. After the material that reaches the lower screen assembly D is screened by the lower screen assembly D, a part of the material passes through the mesh of the lower screen assembly D and falls below the lower screen assembly D, and is sent away by, for example, a belt conveying mechanism, and another part of the material that cannot pass through the mesh of the lower screen assembly D is output from the lower discharge port 112.

In this embodiment, the elastic support mechanism E is matched with the screen box body B, and the exciting force generated by the polarization transmission mechanism a is combined with the buffering of the elastic support mechanism E on the screen box, so that the screen box body B moves along an elliptical trajectory. According to the above description of the polarization transmission mechanism a, the polarization transmission mechanism a uses the centrifugal force generated by the polarization component in the rotation process as the excitation force, and the polarization component cooperates with the elastic support mechanism E to make the whole screen box move along the elliptical track. This structure has the following advantages over the background art:

firstly, only one driving unit is adopted to generate the vibration excitation effect on the screen box, and the screen box has the advantages of saving cost and reducing energy consumption.

Secondly, compared with the prior art, the structure changes the motion trail of the screen box, so that the screen box moves along an elliptical trail, and the motion trails of the upper screen assembly C and the lower screen assembly D depend on the connection structure of the upper screen assembly C and the lower screen assembly D with the screen box body B.

In this embodiment, the elastic supporting mechanism E includes a frame 140 having an inner hole, a plurality of lower supports 141, a plurality of upper supports 142, and a first elastic member (not shown in the figure), a portion of the screen box body B is located inside the frame 140, the lower supports 141 are discretely distributed on the frame 140 and fixed to the frame 140, the upper supports 142 are discretely distributed on the screen box body B and fixed to the screen box body B, one end of the first elastic member is engaged with the lower supports 141, and after the other end of the first elastic member is engaged with the upper supports 142, an axial direction of the first elastic member forms an angle with a longitudinal direction of the screen box body B.

The included angle formed by the axial direction of the first elastic component and the longitudinal direction of the screen box body B is 10-70 degrees, the included angle is preferably 30 degrees, the longitudinal direction of the screen box body B refers to the vertical direction (seen from figure 1) along the screen box body B, and the first elastic component is preferably a spring. In this embodiment, the axial direction of the lower holder 141 is parallel to the axial direction of the first elastic member.

In this embodiment, the frame 140 forms a surrounding state for the screen box body B, the support legs 143 are fixed to the lower portion of the frame 140, and the support legs 143 are matched with the foundation, such as the ground, to make the frame 140 in a suspended state, so that a space is provided between the screen box body B and the foundation, and the space can be provided with a conveying mechanism, such as a belt conveying mechanism, for the material screened out from the lower screen assembly D to fall onto the conveying mechanism and be carried away by the conveying mechanism.

In this embodiment, an included angle is formed between the axial direction of the first elastic component and the longitudinal direction of the screen box body B, so that the screen box body B can move more easily, and the resistance of the screen box body B in the moving process is reduced or reduced. On the other hand, based on the centrifugal force of the included angle combined to the polarization transmission mechanism a, the screen box body B moves along the elliptical track under the action of the exciting force, and therefore, the included angle formed between the axial direction of the first elastic component and the longitudinal direction of the screen box body B is an important factor for enabling the screen box body B to move along the elliptical track.

In this embodiment, an accommodating cavity 144 is formed at one end of the lower support 141 and/or the upper support 142, an end of the first elastic component is located in the accommodating cavity 144, and a limiting effect can be formed on the first elastic component by a cavity wall of the accommodating cavity 144, so that the first elastic component is prevented from being separated from the lower support 141 and/or the upper support 142. Preferably, a positioning post (not shown) is disposed in the accommodating cavity 144, and the first elastic member is combined with the positioning post, so that the first elastic member can be stably positioned.

In this embodiment, the lower support 141 and the upper support 142 are respectively disposed at four corners of the frame 140, so that the number of the lower support 141 and the number of the upper support 142 are respectively 4, preferably, an accommodating cavity 144 is disposed on each lower support 141, two first elastic members are mounted in each accommodating cavity 144, and the upper support 142 is more stably supported by the plurality of first elastic members.

The upper layer screen assembly C comprises a plurality of first screens 150 and a plurality of supporting beams 153, each first screen 150 is provided with a plurality of first screen holes 151, the supporting beams 153 are fixed with the screen box body B, and after the first screens 150 are matched with the supporting beams 153, two adjacent first screens 150 are arranged in a ladder way.

The supporting beams 153 are used for supporting the screen box body B on one hand and the first screen mesh 150 on the other hand, and in this embodiment, a plurality of supporting beams 153 are provided, specifically, the height position from the first supporting beam 153 near the feeding port 110 to the last supporting beam near the upper discharging port 111 is reduced in sequence, so that two adjacent supporting beams 153 are arranged in a ladder shape, and when the first screen mesh 150 is connected with the supporting beams 153, two adjacent first screen meshes 150 are arranged in a ladder shape.

The upper screen assembly C has the advantages that: after the material falls from the feeding hole 110 to the first supporting beam 153 near the feeding hole 110, because the two adjacent first screens 150 are arranged in a step manner, compared with the case of using an integral screen with two ends adapted to the feeding hole 110 and the lower discharging hole 112 and an inclined screen, the first screens 150 arranged in a step manner in this embodiment do not move along the first screens 150 rapidly, but stay on the first supporting beam 153 near the feeding hole 110 for a certain period of time, and after being screened sufficiently under the action of excitation, the material reaches the next first screen 150, so that the screening is performed along each first screen 150, the material can be screened sufficiently, and the separation efficiency of the materials with different diameters can be improved.

The first mesh openings 151 of the first screen 150 are horseshoe-shaped. The material that the compound sieve of this embodiment sieved is raw material and dregs usually, because first mesh 151 of horseshoe shape has great fillet, through trying to obtain and verify, first mesh 151 of horseshoe shape is difficult to the hanging material, has reduced the jam, has the inclined plane 150a from the upper surface to the lower surface of first screen cloth 150 in the first mesh 151 of horseshoe shape in addition, and this inclined plane 150a still makes first screen cloth 150 have the characteristics that intensity is high in the condition that does not influence screening efficiency.

Each first screen 150 forms an included angle of 15-21 degrees with the transverse direction of the screen box body B. In this embodiment, the output port of the feeding port 110 is used as a start position, the input port of the upper layer discharge port 111 is used as an end position, and five first screens 150 are sequentially arranged between the start position and the end position, wherein an included angle between the first screen 150 and the second screen 150 in the transverse direction of the screen box body B is preferably 21 °, an included angle between the third first screen 150 and the screen box body B in the transverse direction is preferably 18 °, and an included angle between the fourth first screen 150 and the fifth first screen 150 in the transverse direction of the screen box body B is preferably 15 °. The arrangement of the included angle further ensures the retention time of the material on each first screen 150, so that the screening efficiency is ensured.

In this embodiment, the first screen 150 is a steel screen, NM500 is preferably used as the material of the first screen 150, and a plurality of first mesh openings 151 are formed on each first screen 150 by stamping, so that the first screen 150 has the advantages of good strength, wear resistance, long service life, and the like.

Because the upper-layer screen assembly C is fixed with the screen box body B, the upper-layer screen assembly C does circular vibration motion along the elliptical track with the screen box body B, the inner diameter of the first mesh hole 151 is 62-80mm, and the first screen 150 can screen raw materials and muck with the particle size within 80 mm.

The upper screen assembly C further includes bar fingers 152 for dispersing the material, and a plurality of bar fingers 152 are spaced apart at the output end of the first screen 150. When the material passes through the bar fingers 152, the material is forcibly dispersed by the bar fingers 152 arranged at intervals, so that the material can be uniformly spread on the first screen 150 after the material reaches the next first screen 150 from the previous first screen 150.

One end of the bar finger 152 is fixed to the output end of the first screen 150, and the other end of the bar finger 152 is tilted upward. The arrangement of the fingers 152 in this manner may provide the fingers 152 with a corresponding resistance to the material, further dispersing the material.

According to the characteristic of material, can choose to let lower floor's screen cloth assembly D along with sieve case body B along elliptical orbit motion, also can choose to let lower floor's screen cloth assembly D do the motion of relaxation, for example, the moisture content of material is lower, and the moisture content does not exceed 20% material, chooses to let lower floor's screen cloth assembly D along with sieve case body B along elliptical orbit motion, and the sieve that passes through this moment is higher, with lower floor's screen cloth assembly D directly like this with sieve case body B fixed can.

However, if the moisture content of the material is high, for example, the moisture content of the material exceeds 20%, if the lower screen assembly D is still moved along the elliptical track along the screen box body B and the steel screen is adopted, the structure is easy to block holes, so that the screening efficiency is reduced.

Because the particle diameter of the material of lower floor's screen cloth assembly D screening is little, for example, be less than 20mm, in order to avoid the condition that lower floor's screen cloth assembly D appears blockking up, in this embodiment, change lower floor's screen cloth assembly D's motion orbit, make lower floor's screen cloth assembly D not along oval orbit motion, but make lower floor's screen cloth assembly D do the motion of relaxation, at the in-process of relaxation motion, lower floor's screen cloth assembly D self forms the effect of shake, make the material see through lower floor's screen cloth assembly D's mesh, the jam has been prevented, and the efficiency of screening has been promoted.

In view of the above-mentioned purpose of making the lower screen assembly D do relaxation motion, and based on the screen box body B moving along the elliptical trajectory, the present embodiment further adds a dynamic propulsion component F, which includes a fixing mechanism and a floating mechanism, wherein the fixing mechanism is fixed with the screen box body B and moves along the elliptical trajectory along with the screen box body B during the excitation process, the floating mechanism is connected with the fixing mechanism, and the floating mechanism converts the fixing mechanism into reciprocating linear motion along the elliptical motion trajectory.

One part of the lower-layer screen assembly D is connected with the screen box body B or the fixing mechanism, one part of the lower-layer screen assembly D moves along the screen box body B along an elliptical track in the vibration excitation process, and the other part of the lower-layer screen assembly D does reciprocating linear motion along the floating mechanism in the vibration excitation process after being connected with the floating mechanism.

Because one part of the lower screen assembly D moves along the elliptical track along with the screen box body B in the vibration excitation process and the other part of the lower screen assembly D does reciprocating linear motion along with the floating mechanism in the vibration excitation process, the lower screen assembly D forms a relaxation state, namely the lower screen assembly D integrally does relaxation motion.

In this embodiment, the sieve box body B is provided with a first yielding hole for yielding when the other part of the lower screen assembly D is connected with the floating mechanism, and the part of the floating mechanism corresponds to the yielding hole. In this embodiment, the other part of the lower screen assembly D passes through the first yielding hole on the screen box body B and is connected with the floating mechanism, so that the other part of the lower screen assembly D makes a reciprocating linear motion along with the floating mechanism. Of course, the floating mechanism may also be fixed to another portion of the lower screen assembly D after passing through the first yielding hole.

In this embodiment, the fixing mechanism includes an upper fixing seat 200 and a lower fixing seat 201, the upper fixing seat 200 and the lower fixing seat 201 are respectively and fixedly connected to the screen box body B, and the floating mechanism is located between the upper fixing seat 200 and the lower fixing seat 201 and is respectively connected to the upper fixing seat 200 and the lower fixing seat 201. Go up fixing base 200 and lower fixing base 201 and be used for supporting the relocation mechanism to avoided making the relocation mechanism directly fixed with sieve case body B, like this, formed the space that supplies relocation mechanism elastic deformation between last fixing base 200 and relocation mechanism, and formed the space that supplies relocation mechanism elastic deformation between fixing base 201 and relocation mechanism down, made the relocation mechanism can offset the vertical effort of the edge sieve case body B that the fixed establishment transmitted, and then only remain on the relocation mechanism along the horizontal effort of sieve case body B.

In this embodiment, the cross-sections of the upper fixing seat 200 and the lower fixing seat 201 are both L-shaped, and the upper fixing seat 200 and the lower fixing seat 201 in such a shape are convenient to fix on the screen box body B on the one hand and convenient to connect the floating mechanism on the other hand. And when the longitudinal acting force is too large, the U-shaped structures of the upper fixing seat 200 and the lower fixing seat 201 can also generate slight deformation so as to assist the floating mechanism to buffer the longitudinal acting force.

The floating mechanism comprises a buffer element 202 and a middle mounting seat 203, wherein the buffer element 202 is used for offsetting longitudinal acting force from the fixing mechanism, the buffer element 202 is fixed with the fixing mechanism, the middle mounting seat 203 is used for being fixed with the other part of the lower-layer screen assembly D, and the buffer element 202 is respectively fixed on two sides of the middle mounting seat 203.

In this embodiment, the buffer element 202 preferably adopts a rubber block, the buffer element 202 includes a buffer main body 202a, a connecting portion 202b and a protruding portion 202c, the two ends of the buffer main body 202a are respectively provided with the connecting portion 202b, one of the connecting portions 202b is used for connecting the upper fixing base or the lower fixing base, and the other connecting portion 202b is used for connecting the middle mounting base 203. The connecting portion 202b extends outward of the cushion body 202a, the protrusion 202c is disposed at a middle portion of the cushion body 202a, and the protrusion 202c is used to increase the strength of the cushion body 202a, so that the cushion body 202a is prevented from being damaged when resisting a force in a lateral direction during a force application.

In this embodiment, the cross section of the middle mounting seat 203 is preferably U-shaped, which is convenient for connecting the buffer elements 202 on two sides of the middle mounting seat 203, and on the other hand, the recess in the middle of the buffer element 202 saves material and reduces weight, and when the longitudinal acting force is too large, the U-shaped structure of the middle mounting seat 203 can also deform slightly to assist the buffer of the buffer elements 202 to the longitudinal acting force.

The lower screen assembly D comprises a first support component 204, a second support component 205 and a second screen 206, wherein the first support component 204 is fixed with the screen box body B or a fixing mechanism, the first support component 204 moves along an elliptical track with the screen box body B, the first support component 204 corresponds to one part of the lower screen assembly D, the second support component 205 is fixed with the dynamic propulsion component F, the second support component 205 is fixed with a floating mechanism in the dynamic propulsion component F, the second support component 205 corresponds to the other part of the lower screen assembly D, and the second support component 205 makes reciprocating linear motion with the floating mechanism in the excitation process. One end of the second screen 206 is connected to the first support assembly 204 and the other end of the second screen 206 is connected to the second support assembly 205.

The first support assembly 204 and the second support assembly 205 each comprise a support rod 207, two clamping plates 208, one end of each clamping plate 208 is fixed with the support rod 207, the other end of each clamping plate 208 is a free end, and the end of the second screen 206 is located between the two clamping plates 208 and clamped. The two ends of the second screen 206 are respectively bent to form bent portions, and the first supporting component 204 and the second supporting component 205 respectively generate clamping force to the bent portions of the second screen 206 to fix the second screen 206, so that the screen fixing device has the advantage of being convenient to install and disassemble.

The second screen 206 is preferably made of polyurethane, and because the polyurethane has elasticity, the second screen 206 itself is deformed and shaken in the relaxation process, and the material easily passes through the meshes of the second screen 206, so that the lower screen assembly D of the embodiment is suitable for screening viscous materials.

Claims (8)

1. Polarization drive mechanism of compound sieve, its characterized in that includes:

a rotating shaft (100);

the end face bearing (101), the end face bearing (101) is fixed with the sieve box (B);

the first bearing seat (102), the first bearing seat (102) is fixed with the end face bearing (101);

and the rotating shaft (100) passes through the end face bearing (101) and the first bearing seat (102) and then is fixed with the polarizing component.

2. The polarization transmission mechanism of the composite screen of claim 1, wherein the polarization component is fixed with the rotation shaft (100) in the circumferential direction and the axial direction, and the polarization component abuts against the first bearing seat (102).

3. The polarization transmission mechanism of the composite screen according to claim 1, further comprising a screw (103), wherein the polarization component and the rotating shaft (100) are fixed in the circumferential direction through spline fitting, a screw hole is formed in the circumferential surface of the polarization component, a threaded hole is formed in the circumferential surface of the rotating shaft (100), and the screw penetrates through the screw hole in the polarization component and is in threaded connection with the threaded hole in the rotating shaft (100), so that the polarization component and the rotating shaft (100) are fixed.

4. A polarization transmission mechanism of a composite screen according to any one of claims 1 to 3, wherein the polarization assembly comprises: the connecting seat (104), the rotating shaft (100) is fixed with the connecting seat (104);

the polarization block (105) is used for generating exciting force during rotation, and one end of the polarization block (105) is fixed with the connecting seat (104).

5. The polarization transmission mechanism of the composite screen according to claim 4, wherein the connecting base (104) is provided with a shoulder (104a), and the polarization block (105) is sleeved on the shoulder (104a) and is matched with the shoulder (104 a).

6. The polarization transmission mechanism of the composite screen according to claim 4, wherein the other end of the polarization block (105) abuts against the first bearing seat (102).

7. The polarization transmission mechanism of claim 4, wherein the polarization assembly further comprises: one or more balancing weights (108), the balancing weights (108) being fixed to the polarizing mass (105).

8. The polarization actuator of composite screen of claim 1, further comprising:

a reinforcing plate (106), wherein the reinforcing plate (106) is fixed with the end face bearing (101);

the sleeve (107), sleeve (107) cover is in the pivot (100), and the terminal surface of sleeve (107) and reinforcing plate (106) cooperation.

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