CN204503562U - Three-freedom-degree hybrid vibrating screen is rotated in two translations one - Google Patents

Abstract

The utility model discloses a two-translation-rotation three-degree-of-freedom hybrid vibrating screen, which comprises a support frame, a transverse vibration excitation device, a screen body, a rotary vibration excitation device, a vertical vibration excitation device, an auxiliary limit chain, a spring, and a suspension ring. Bolt and hopper. There is a material box frame on the support frame, and the screen body is suspended on the support frame by springs and eyebolts. The horizontal vibration device, the rotary vibration device, and the vertical vibration device can make the screen body generate horizontal reciprocating vibrations and vibrate around the horizontal axis respectively. The reciprocating swing and vertical reciprocating vibration, the auxiliary limit chain is used to limit the freedom of movement of the screen body and enhance the stability of movement. The sieve body of the utility model can realize the vibration of two translations and one rotation at most with a total of three degrees of freedom, and the parameters such as the amplitude and frequency of each direction, the inclination angle of the screen surface, and the degree of freedom can be adjusted, and the screening efficiency is high, and the processing capacity per unit time It also has the advantages of compact structure, stable and reliable operation, low equipment cost and operating power consumption, and simple control.

Description

Two-translation-rotation three-degree-of-freedom hybrid vibrating screen

technical field

The utility model relates to the field of vibrating screening equipment, in particular to a three-degree-of-freedom hybrid vibrating screen with two translations and one rotation.

Background technique

At present, vibrating screens are widely used in energy, metallurgy, ceramics, building materials, chemical industry, agriculture, food processing and other industries, mainly for the classification of granular materials. The actual screening efficiency per unit time of the existing vibrating screen is low, the material dispersion on the screen surface is not high, the material distribution on the screen surface is uneven, and the screen penetration effect is poor; The screening effect of screening materials has been unsatisfactory, and the screen holes are easily blocked. The treatment method of increasing the vibration intensity of the vibrating screen is often limited by the rigidity of the screen box, and the dispersion, stratification and interlayer movement of the material on the screen surface are lacking. Enough motivation. In addition, the vibration degrees of freedom of the existing vibrating sieves are less, most of which are 1-2 degrees of freedom and the degrees of freedom are fixed, and the adaptability to screening objects is poor. The Chinese patent with application number 201110295715.0 designed by the first inventor of the utility model discloses a four-degree-of-freedom hybrid vibrating screen. Since the vertically arranged moving pair is used as the driving pair, the high-frequency vibration of the vibrating screen cannot be realized. The Chinese patent No. 201110100682.X designed by the first inventor of the utility model discloses a three-degree-of-freedom hybrid vibrating screen. The vibration motor in the excitation mode provides power, and the inertial vibration of the vibration motor will interfere with the vibration in two horizontal directions, and the degree of freedom of vibration in this technical solution lacks the degree of freedom of rotation, and the screening effect is limited. The Chinese patent No. 200920143613.5 designed by the first inventor of the utility model discloses a four-degree-of-freedom hybrid vibrating screen, which can realize three-dimensional movement in space and one rotation. The rotation of the vertical axis; the vibration in the vertical direction in the technical solution described in the patent is driven by a linear motor, and the linear motor needs to overcome the load generated by its own gravity when moving, and it is difficult to achieve high-frequency vibration; the structural layout of the vibrating screen described in the patent It is unreasonable and cannot be used for screening a large amount of granular materials in industrial production. The Chinese patent No. 201310752446.5 designed by the first inventor of the utility model discloses a variable-degree-of-freedom parallel vibrating screen, which can realize vibrations with a maximum of two movements and three rotations in a total of five degrees of freedom in space, but the sieve The movement freedom of the mesh is too much and the structure is complex, but the actual production does not need too much movement freedom; in addition, the rotation of the vibrating screen mesh around the horizontal axis parallel to the length direction of the screen surface needs to rely on two SPS structures The coordinated motion of the median vibration chain is realized, so that the rotational vibration frequency and the load of the screen surface are limited.

The two-translation-rotation three-degree-of-freedom hybrid vibrating screen involved in the utility model can at most realize the vibration of three degrees of freedom in two movements and one rotation in space, and the amplitude and frequency of each vibration direction, as well as the inclination angle of the screen surface and the vibration degree of freedom And other parameters can be adjusted, which can overcome the technical defects of the existing vibrating screen.

Contents of the invention

The purpose of this utility model is to provide a two-translation-rotation three-degree-of-freedom hybrid vibrating screen for the deficiencies of the prior art, especially to enable the screen body to realize three-degree-of-freedom vibration with two movements and one rotation in space. The technical defect of the existing vibrating screen is overcome, the screening quality and the processing capacity per unit time of the screening operation are improved, and the manufacturing cost and operating power consumption of the equipment are reduced at the same time.

The technical problems to be solved by the utility model are realized by the following technical solutions.

A two-translation-rotation three-degree-of-freedom hybrid vibrating screen includes a support frame, a transverse vibration excitation device, a screen body, a rotary vibration excitation device, a vertical vibration excitation device, an auxiliary limit chain, a spring, an eyebolt and a hopper. Wherein, the support frame includes a bottom bracket and a top bracket, and the top bracket is located above the bottom bracket and is fixedly connected with the bottom bracket by screws. There is a material box frame for supporting the under-screen material box on the bottom bracket, a main beam and an auxiliary beam on the top of the top bracket, a square connecting plate at the bottom of the top bracket, and two square connecting plates on the square connecting plate. Symmetrically arranged slider bearings; the horizontal vibration device is used to make the screen body produce lateral reciprocating vibration, its bottom is fixedly installed on the square connecting plate of the top bracket, and its top is connected with the screen body through screws; the The eyebolts are installed on the main girder of the top bracket, the upper end of the spring is hooked on the ring at the lower end of the eyebolt, and the lower end of the spring is hooked on the screen body; the rotary vibration excitation device is installed on the screen body The bottom side of the screen body is used to make the screen body reciprocate around the horizontal axis parallel to the length direction of the screen body; the vertical vibration excitation device is symmetrically installed on the top of the screen body, and consists of two sets of the same specification and axes parallel to each other When the two vibration motors rotate synchronously and reversely, the screen body can produce reciprocating vibration in the vertical direction; the auxiliary limit chain has two groups, which are used to limit the freedom of movement of the screen body and enhance the screen body. motion stability. The top of the auxiliary limiting chain is installed on the auxiliary beam of the top bracket, and the bottom of the auxiliary limiting chain is connected with the screen body through screws; the hopper is fixedly installed on the top bracket.

The screen body includes an outer screen frame, an inner screen frame, a screen frame, a screen cloth, an angle locker, a connecting beam, a supporting beam and lifting lugs. Wherein, the front end of the outer screen frame is provided with a short waist-shaped hole in the horizontal direction, and the rear end of the outer screen frame is provided with a long waist-shaped hole in the vertical direction. The inner sieve frame is placed in the outer sieve frame, and the middle part of the inner sieve frame is provided with a reinforcing beam, and the left and right sides of the inner sieve frame are provided with four symmetrically arranged spring fixing seats for fixing the return spring. The front end of the inner screen frame is provided with a front positioning shaft, and the front positioning shaft is connected with the inner screen frame through threads, and the rear end of the inner screen frame is provided with a rear positioning shaft. The front positioning shaft is located in the short waist hole of the outer screen frame and can slide along the short waist hole. The front positioning shaft is fixed on the outer screen frame by locking screws; the rear positioning shaft is located in the In the oblong hole of the outer screen frame, and can slide along the oblong hole, the rear positioning shaft is connected with the outer screen frame through an angle locker. The screen frame used to fix and install the screen is located directly above the inner screen frame. Two vibration transmission beams are arranged on the bottom side of the screen frame, and a transfer shaft is provided in the middle of the screen frame. The two ends of the intermediate shaft are connected to the inner screen frame through hinges, one end of the vibration transmission beam is fixedly connected to the intermediate shaft by welding, and the two sides of the screen frame and the inner screen frame are reset by four The spring is connected. The screen is installed on the screen frame, and the screen and the screen frame are connected by screws or pressing blocks. The connecting beam is located in the middle of the top of the outer screen frame, and is used to install the vertical vibration device and the auxiliary limit chain, and the connecting beam is connected with the outer screen frame by screws; the supporting beam is located on the outer screen frame. The top of the front end of the screen frame is fixedly connected with the outer screen frame by welding; the lifting lugs are located on the top surfaces of both sides of the outer screen frame and are fixedly connected with the outer screen frame.

The transverse vibration excitation device includes a transverse drive motor, a commutator, a left transverse drive mechanism, a right transverse drive mechanism, a transverse transmission shaft and a transverse vibration chain. Wherein, the transverse drive motor is connected with the commutator through a coupling to provide transverse vibration power for the left transverse drive mechanism and the right transverse drive mechanism; there are two sets of transverse vibration chains, which are symmetrically arranged on the top bracket on the square connecting plate; the output shaft on the left side of the commutator is connected with the transverse vibration chain through the left transverse drive mechanism, and the output shaft on the right side of the commutator is connected with the transverse transmission shaft through a universal coupling; The transverse transmission shaft is installed on the square connecting plate through two transverse bearing seats, and the right end of the transverse transmission shaft is connected with the transverse vibration chain through the right transverse drive mechanism.

The structure of the left lateral drive mechanism and the right lateral drive mechanism is exactly the same, both are slider crank mechanisms, and the left lateral drive mechanism and the right lateral drive mechanism are symmetrically arranged on the square connecting plate of the top bracket. The right lateral drive mechanism includes an adjustable eccentric wheel, a drive link, a slider assembly and an Ω-shaped guide rail. Wherein, the adjustable eccentric wheel is installed on the right end of the transverse transmission shaft, and is connected with the transverse transmission shaft through a flat key, and a slidable hinge is provided outside the adjustable eccentric wheel for adjusting the position of the adjustable eccentric wheel. The eccentric distance, and the sliding hinge and the adjustable eccentric wheel are connected by locking screws; one end of the drive link is connected to the adjustable eccentric wheel through a sliding hinge, and the other end is connected to the slider assembly Connected by hinges; the slider assembly and the Ω-shaped guide rail are connected through linear bearings, the Ω-shaped guide rail is fixedly installed on the slider support at the bottom of the top bracket, and anti- hit the block.

The transverse vibration chain is used to transmit the transverse linear reciprocating vibration generated by the left transverse drive mechanism and the right transverse drive mechanism to the outer screen frame, including the first transverse link, the second transverse link, the third transverse link and the transverse ear socket. Wherein, the bottom of the first transverse link is fixedly mounted on the slider assembly of the left transverse drive mechanism or the right transverse drive mechanism by screws, and the top of the first transverse link and the second transverse link are rotated through the first transverse The pair is connected; the second transverse link is connected with the third transverse link through the second transverse rotation pair; the third transverse link is connected with the transverse ear seat through the third transverse rotation pair; The transverse lugs are fixed on the outer screen frame by screws; the axes of the first transverse rotation pair, the second transverse rotation pair and the third transverse rotation pair are parallel to each other. The transverse vibration chain is a series mechanism of PRRR structure. Four transverse vibration chains with the same structure and parallel axes are symmetrically arranged between the outer screen frame and the support frame, which not only improves the rigidity and structural strength of the transverse vibration excitation device , It also defines the rotation of the outer screen frame around the horizontal axis parallel to the width direction of the screen body and the rotation around the vertical axis.

The auxiliary limiting chain includes a double ear base, a limiting chain and a top connecting plate, and the double ear base is fixed and installed on the connecting beam of the outer screen frame by screws; the limiting chain has two groups and is symmetrical It is arranged between the double ear base and the top connecting plate; the above connecting plate is fixedly connected with the auxiliary support beam of the top bracket.

The limit chain includes a first limit link, a second limit link and a limit lug. Wherein, the bottom of the first limit connecting rod is connected with the double ear base through the first limit rotating pair, and the top of the first limit connecting rod is connected with the second limit connecting rod through the second limit rotating pair. connection; the second limit connecting rod is connected with the limit ear seat through the third limit rotation pair; the limit limit ear seat is connected with the top connecting plate through screws; the first limit rotation The axes of the pair, the second limiting rotating pair and the third limiting rotating pair are parallel to each other. The limit chain is a series mechanism of RRR structure. Four limit chains with the same structure and parallel axes are symmetrically arranged between the outer screen frame and the top bracket, and limit the outer screen frame to be parallel to the length direction of the screen body. The rotation of the horizontal axis, the rotation around the vertical axis and the longitudinal movement also help to improve the stability of the screen body movement.

The rotary vibration excitation device includes a rotary drive motor, a vibration excitation cam, and a cam transmission shaft. Wherein, the rotary drive motor is fixedly installed on the bottom surface of the inner screen frame, and the rotary drive motor is connected with the cam drive shaft through a coupling to provide the power for the rotary excitation of the vibration cam; the cam drive shaft passes through Two slewing bearing seats are installed on the bottom surface of the inner screen frame; there are two excitation cams, which are symmetrically arranged at both ends of the cam transmission shaft, and the outer edge surface of the excitation cam is in contact with the bottom of the screen frame. The vibration transmission beam is always kept in contact under the action of the return spring.

The angle locker includes an outer sleeve rod, an inner sliding rod and an adjusting bolt, which are used to limit the position of the rear positioning axis of the inner screen frame in the oblong hole of the outer screen frame, thereby limiting the inclination angle of the inner screen frame. Wherein, one end of the outer outer rod is connected with the rear positioning shaft of the inner screen frame by a screw, and the other end is provided with a U-shaped groove; one end of the inner sliding rod is placed in the U-shaped groove of the outer outer rod, and It is connected with the outer rod through adjusting bolts, and the other end of the inner sliding rod is connected with the outer screen frame through hinges.

From a mechanical point of view, the lateral vibration chain and the auxiliary limit chain of the utility model connect the outer screen frame and the support frame in parallel to form a structure of 2{-P‖R‖R‖R-}+2{ -R‖R‖R‖R-} two-translation two-degree-of-freedom parallel mechanism, the symbol P represents the moving pair, the symbol R represents the rotating pair, and the symbol ‖ represents the parallel axis; and a rotating pair is formed between the inner screen frame and the screen frame. Therefore, the utility model can be regarded as a hybrid mechanism with a structure of {2P∥R‖R‖R-2R‖R‖R-}-R, and the mechanism type can be abbreviated as 2{PRRR-RRR}-R. The 2{PRRR-RRR}-R hybrid mechanism of the utility model has three degrees of freedom in total of two translations and one rotation, in which two translations are movements along the length direction and the vertical direction of the screen body, and one rotation is the movement around the screen body. Rotation along a horizontal axis parallel to the length of the screen body.

When in use, the vibration parameters such as the degree of freedom of vibration, amplitude, screen surface inclination and frequency required for material screening can be selected according to the actual situation. The adjustment of the inclination angle of the screen surface is mainly by adjusting the relative position of the inner sliding rod in the angle locker in the U-shaped groove of the outer rod, and then tightening the adjusting bolt. The adjustment of the lateral vibration parameters of the screen is realized by the lateral excitation device. By adjusting the speed of the lateral drive motor, the frequency of the lateral vibration of the screen can be adjusted. By adjusting the eccentricity of the adjustable eccentric wheels in the left and right lateral drive mechanisms The amplitude of the lateral vibration can be adjusted. The amplitude and frequency of the vertical vibration of the screen can be adjusted by adjusting the rotational speed of the vibration motor of the vertical vibration excitation device and the included angle of the eccentric block.

The beneficial effect of the utility model is that, compared with the existing technology, the utility model can realize the vibration of two degrees of freedom in space, two movements and one rotation at most, and the amplitude, frequency, screen surface inclination and vibration of each vibration direction Parameters such as the degree of freedom can be adjusted independently without interfering with each other, and the movement in each direction is completely decoupled, which can overcome the technical defects of the existing vibrating screen. The vibration of the screen along its length and vertical direction is conducive to the effective stratification, screening and transportation of materials, and the rotation of the screen around the horizontal axis parallel to its length is more conducive to the dispersion and stratification of materials on the screen surface , so that the sieve surface material particles get more opportunities to contact the screen. The three-degree-of-freedom vibration of the screen with two translations and one rotation can greatly improve the screening efficiency of materials and the processing capacity per unit time. Under the condition of stable processing capacity, it is beneficial to reduce the size of the screening equipment. It also has compact structure and stable operation. Reliable, low equipment cost, low operating power consumption, and simple control.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the lateral vibration device of the present invention;

Fig. 3 is the structure diagram of the right lateral drive mechanism and the lateral vibration chain of the utility model;

Fig. 4 is the general structure schematic diagram of the sieve body of the present utility model;

Fig. 5 is a schematic diagram of the assembly relationship between the outer screen frame, the inner screen frame and the screen frame of the present utility model;

Fig. 6 is a structural schematic diagram of the rotary vibration excitation device of the present invention;

Fig. 7 is the structural schematic diagram of the angle locking device of the present utility model;

Figure 8 is a schematic structural view of the outer rod of the angle locker of the present invention;

Fig. 9 is a schematic structural view of the auxiliary spacer chain of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments and illustrations.

As shown in Fig. 1, Fig. 2 and Fig. 3, a two-translation-rotation three-degree-of-freedom hybrid vibrating screen includes a support frame 1, a transverse excitation device 2, a screen body 3, a rotary excitation device 4, a vertical excitation Vibration device 5, auxiliary limit chain 6, spring 7, eyebolt 8 and hopper 9. Wherein, the support frame 1 includes a bottom bracket 11 and a top bracket 12, and the top bracket 12 is located above the bottom bracket 11 and is fixedly connected with the bottom bracket 11 by screws. On the three sides of the bottom bracket 11, there are material box racks 111 for supporting the material box under the screen, a main beam 121 and an auxiliary beam 122 are arranged on the top of the top bracket 12, and a square frame is arranged at the bottom of the top bracket 12 The connecting plate 123 is provided with two symmetrically arranged slider supports 124 on the square connecting plate 123; the horizontal vibration excitation device 2 is used to make the screen body 3 generate X-direction reciprocating vibration, and its bottom is fixedly installed on the top bracket 12 on the square connecting plate 123, the top of which is connected to the screen body 3 by screws; the eyebolt 8 is installed on the main beam 121 of the top bracket 12, and the upper end of the spring 7 is hooked on the eyebolt 8 On the suspension ring at the lower end, the lower end of the spring 7 is hooked on the sieve body 3; the rotary vibration excitation device 4 is installed on the bottom side of the sieve body 3, and is used to make the sieve body 3 reciprocate around the X axis; The vertical vibrating device 5 described above is composed of two identical vibrating motors. The axes of the two vibrating motors are parallel to each other, and they are symmetrically installed on the top of the screen body 3. When the two vibrating motors rotate synchronously and reversely, the screen body 3 Generate Z-direction reciprocating vibration; the auxiliary limit chain 6 has two groups, which are used to limit the freedom of movement of the sieve body 3 and enhance the movement stability of the sieve body 3 at the same time. The top of the auxiliary limit chain 6 is installed on the auxiliary beam 122 of the top bracket 12, and the bottom of the auxiliary limit chain 6 is connected with the screen body 3 by screws; the hopper 9 is fixedly installed on the top bracket 12.

As shown in Figure 1, Figure 4, Figure 5 and Figure 6, the screen body 3 includes an outer screen frame 31, an inner screen frame 32, a screen frame 33, a screen 34, an angle locker 35, and a connecting beam 36 , supporting beam 37 and lifting lug 38. Wherein, the front end of the outer screen frame 31 is provided with a short waist-shaped hole 311 in the horizontal direction, and the rear end of the outer screen frame 31 is provided with a long waist-shaped hole 312 in the vertical direction; the inner screen frame 32 is placed in the outer screen frame 31 Inside, a reinforcing crossbeam 321 is provided in the middle of the inner screen frame 32, four symmetrically arranged spring fixing seats 322 are provided on the left and right sides of the inner screen frame 32, and a front positioning shaft 323 is provided at the front end of the inner screen frame 32, And the front positioning shaft 323 is connected with the inner screen frame 32 by threads, the rear end of the inner screen frame 32 is provided with a rear positioning shaft 324, and the front positioning shaft 323 is located in the short waist-shaped hole 311 of the outer screen frame 31 and passes through The locking screw is fixed on the outer screen frame 31, and the rear positioning shaft 324 is located in the oblong hole 312 of the outer screen frame 31 and connected with the outer screen frame 31 through an angle locker 35; the screen frame 33 is located directly above the inner screen frame 32, two vibration transmission beams 331 are provided on the bottom side of the screen frame 33, and a transfer shaft 332 is provided in the middle of the screen frame 33, and the two transfer shafts 332 One end of the vibration transmission beam 331 is connected with the inner screen frame 32 through a hinge, and one end of the vibration transmission beam 331 is fixedly connected with the intermediate shaft 332 by welding, and the two sides of the screen frame 33 are connected with the inner screen frame 32 through four The return spring 39 is connected; the screen 34 is installed on the screen frame 33; the connecting beam 36 is located at the top middle position of the outer screen frame 31, and is used for installing the vertical vibration device 5 and the auxiliary limit chain 6, and the connecting beam 36 is connected with the outer screen frame 31 by screws; the support beam 37 is located at the top of the front end of the outer screen frame 31, and is fixedly connected with the outer screen frame 31 by welding; the The lifting lugs 38 are located on the top surfaces of both sides of the outer screen frame 31 and are fixedly connected with the outer screen frame 31.

As shown in Fig. 1, Fig. 2 and Fig. 3, described transverse vibrating device 2 comprises transverse driving motor 21, commutator 22, left transverse driving mechanism 23, right transverse driving mechanism 24, transverse transmission shaft 27 and transverse vibration Chain 28. Wherein, the described transverse driving motor 21 is connected with the commutator 22 through a shaft coupling, and provides transverse vibration power for the left transverse driving mechanism 23 and the right transverse driving mechanism 24; the described transverse vibrating chain 28 has two groups, and Symmetrically arranged on the square connecting plate 123 of the top bracket 12; the output shaft on the left side of the commutator 22 is connected with the transverse vibration chain 28 through the left lateral drive mechanism 23, and the output shaft on the right side of the commutator 22 is passed through the ten thousand The coupling 25 is connected with the transverse transmission shaft 27; the transverse transmission shaft 27 is installed on the square connecting plate 123 through two transverse bearing seats 26, and the right end of the transverse transmission shaft 27 is connected to the transverse vibration by the right transverse drive mechanism 24. Chains 28 are connected.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the left lateral drive mechanism 23 and the right lateral drive mechanism 24 have the same structure, and are arranged symmetrically on the square connecting plate 123 of the top bracket 12 . The right transverse driving mechanism 24 includes an adjustable eccentric wheel 241 , a driving link 242 , a slider assembly 243 and an Ω-shaped guide rail 244 . Wherein, the adjustable eccentric wheel 241 is installed on the right end of the transverse transmission shaft 27, and is connected with the transverse transmission shaft 27 through a flat key, and a slidable hinge 2411 is provided outside the adjustable eccentric wheel 241 for adjusting The eccentricity of the adjustable eccentric wheel 241, and the sliding hinge 2411 is connected with the adjustable eccentric wheel 241 by locking screws; one end of the drive link 242 is connected to the adjustable eccentric wheel 241 through the sliding hinge 2411, the other end of which is connected to the slider assembly 243 through a hinge; the slider assembly 243 is connected to the Ω-shaped guide rail 244 through a linear bearing, and the Ω-shaped guide rail 244 is fixedly installed on the bottom of the top bracket 12 On the slider support 124 , anti-collision blocks 2441 are provided at both ends of the Ω-shaped guide rail 244 .

As shown in Fig. 1, Fig. 2 and Fig. 3, the described transverse vibration chain 28 is used to transmit the X-direction linear reciprocating vibration produced by the left transverse drive mechanism 23 and the right transverse drive mechanism 24 to the outer screen frame 31, including the first The transverse link 281 , the second transverse link 282 , the third transverse link 283 and the transverse lug 284 . Wherein, the bottom of the first transverse link 281 is fixedly mounted on the slider assembly 243 of the left transverse drive mechanism 23 or the right transverse drive mechanism 24 by screws, and the top of the first transverse link 281 is connected with the second transverse link. 282 is connected through the first transverse rotation pair 285; the second transverse link 282 is connected with the third transverse link 283 through the second transverse turn pair 286; the third transverse link 283 is connected with the transverse lug 284 is connected by the third lateral rotation pair 287; the lateral ear seat 284 is fixedly installed on the outer screen frame 31 by screws; the first lateral rotation pair 285, the second lateral rotation pair 286, the third lateral rotation pair The axes of 287 are parallel to each other. The transverse vibrating chain 28 is a series mechanism of PRRR structure. Four transverse vibrating chains 28 with the same structure and parallel axes are arranged symmetrically between the outer screen frame 31 and the support frame 1, which not only improves the performance of the transverse vibrating device 2 The rigidity and structural strength of the outer screen frame 31 also limit the rotation around the Y-axis and the Z-axis.

As shown in Fig. 1 and Fig. 9, the auxiliary limit chain 6 includes a two-ear base 61, a limit chain 62 and a top connecting plate 63, and the two-ear base 61 is fixed and installed on the connection of the outer screen frame 31 by screws. On the beam 36; the limit chain 62 has two groups, and is symmetrically arranged between the double ear base 61 and the top connecting plate 63; the above connecting plate 63 is fixedly connected with the auxiliary beam 122 of the top bracket 12 .

As shown in FIGS. 1 and 9 , the limiting chain 62 includes a first limiting link 621 , a second limiting link 622 and a limiting ear seat 623 . Wherein, the bottom of the first limit connecting rod 621 is connected with the double ear base 61 through the first limit rotating pair 624, and the top of the first limit connecting rod 621 is connected with the second limit connecting rod 622 through the second limit connecting rod 622. The limit rotation pair 625 is connected; the second limit connecting rod 622 is connected with the limit ear seat 623 through the third limit rotation pair 626; the limit limit ear seat 623 is connected to the top connecting plate 63 through screws connected; the axes of the first limit rotation pair 624, the second limit rotation pair 625, and the third limit rotation pair 626 are parallel to each other. The limit chain 62 is a series mechanism of RRR structure. Four limit chains 62 with the same structure and parallel axes are symmetrically arranged between the outer screen frame 31 and the top bracket 12 of the support frame, defining the outer screen frame. The rotation of 31 around the X-axis and the Z-axis and the movement along the Y-axis make the outer screen frame 31 only have two degrees of freedom of movement along the X-axis and the Z-axis. In addition, the four limiting chains 62 arranged symmetrically also help to improve the stability of the movement of the screen body 3 .

As shown in FIG. 1 , FIG. 5 and FIG. 6 , the rotary vibration excitation device 4 includes a rotary drive motor 41 , a vibration excitation cam 42 , and a cam transmission shaft 43 . Wherein, the rotary drive motor 41 is fixedly installed on the bottom surface of the inner screen frame 32, and the rotary drive motor 41 is connected with the cam drive shaft 43 through a shaft coupling to provide the rotary excitation power for the excitation cam 42; The cam transmission shaft 43 is mounted on the bottom surface of the inner screen frame 32 through two slewing bearing seats 44; the vibration excitation cam 42 has two, and is symmetrically arranged at both ends of the cam transmission shaft 43, and the vibration excitation The outer edge surface of the cam 42 is always in contact with the vibration transmission beam 331 at the bottom of the screen frame 33 under the action of the return spring 39 .

As shown in Fig. 1, Fig. 4, Fig. 5, Fig. 7 and Fig. 8, the angle locker 35 includes an outer rod 351, an inner sliding rod 352 and an adjusting bolt 353, which are used to define the rear positioning axis of the inner screen frame 32 324 in the oblong hole 312 of the outer screen frame 31, thereby defining the inclination angle of the inner screen frame 32. Wherein, one end of the outer cover rod 351 is connected with the rear positioning shaft 324 of the inner screen frame 32 by screws, and the other end is provided with a U-shaped groove 3511; The U-shaped groove 3511 is connected with the outer rod 351 through an adjusting bolt 353, and the other end of the inner sliding rod 352 is connected with the outer screen frame 31 through a hinge.

From a mechanical point of view, the lateral vibration chain 28 and the auxiliary limit chain 6 of the present invention connect the outer screen frame 31 and the support frame 1 in parallel to form a structure of 2{-P‖R‖R‖R- }+2{-R‖R‖R-} is a two-degree-of-freedom parallel mechanism that can translate along the X and Z directions. The symbol P represents the moving pair, the symbol R represents the rotating pair, and the symbol ‖ represents the axis parallel; and the inner screen A rotary pair is formed between the frame 32 and the screen frame 33 . Therefore, the utility model can be regarded as a hybrid mechanism with a structure of {2P∥R‖R‖R-2R‖R‖R-}-R, and the mechanism type can be abbreviated as 2{PRRR-RRR}-R. The 2{PRRR-RRR}-R hybrid mechanism of the present invention has two degrees of freedom in translation and one rotation, in which two translational movements are along the X direction and Z direction respectively, and one rotation is around the X direction. shaft rotation.

When in use, the vibration parameters such as the degree of freedom of vibration, amplitude, screen surface inclination and frequency required for material screening can be selected according to the actual situation. The adjustment of the inclination angle of the screen surface is mainly by adjusting the relative position of the inner sliding rod 352 in the angle locker 35 in the U-shaped groove 3511 of the outer rod 351, and then tightening the adjusting bolt 353. The X-direction vibration parameter adjustment of the screen cloth 34 is realized by the transverse vibration device 2. The frequency of the X-direction vibration of the screen cloth 34 can be adjusted by adjusting the rotating speed of the transverse drive motor 21. By adjusting the left transverse drive mechanism 23 and the right transverse drive mechanism 24 The eccentricity of the middle adjustable eccentric wheel 241 can adjust the amplitude of the X-direction vibration. Adjusting the rotation speed of the vibrating motor of the vertical vibrating device 5 and the included angle of the eccentric block can realize the adjustment of the amplitude and frequency of Z vertical vibration of the screen 34 .

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of protection claimed by the utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. A two-translation-rotation three-degree-of-freedom hybrid vibrating screen, including a support frame, a screen body, a spring, an eyebolt, and a hopper, is characterized in that: it also includes a horizontal vibration excitation device, a rotary vibration excitation device, and a vertical vibration excitation device. device and auxiliary limit chain, the support frame includes a bottom bracket and a top bracket, the top bracket is located above the bottom bracket and is fixedly connected with the bottom bracket by screws, a material box frame is arranged on the bottom bracket, and a top bracket is installed on the top bracket. The top of the bracket is provided with a main support beam and an auxiliary support beam, a square connection plate is provided at the bottom of the top support, and two symmetrically arranged slider supports are arranged on the square connection plate; the bottom of the horizontal vibration device is fixedly installed On the square connecting plate of the top bracket, its top is connected with the screen body by screws; the eyebolt is installed on the main beam of the top bracket, and the upper end of the spring is hooked on the ring at the lower end of the eyebolt. The lower end of the spring is hooked on the screen body; the rotary vibration excitation device is installed on the bottom side of the screen body; the vertical vibration excitation device is installed on the top of the screen body, and two vibration motors whose axes are parallel to each other It consists of two sets of auxiliary limit chains, the top of which is installed on the auxiliary support beam of the top bracket, and the bottom of which is connected with the screen body through screws; the hopper is fixedly installed on the top bracket; The screen body includes an outer screen frame, an inner screen frame, a screen frame, a screen mesh, an angle locker, a connecting beam, a supporting beam and lifting lugs, and a horizontal short Waist-shaped hole, a vertical long waist-shaped hole is provided at the rear end of the outer screen frame, and a connecting beam and a supporting beam are respectively provided at the middle position and the front end of the top of the outer screen frame; the inner screen frame is placed in the outer screen frame , the middle part of the inner screen frame is provided with a reinforcing beam, the left and right sides of the inner screen frame are provided with four symmetrically arranged spring fixing seats, and the front and rear positioning shafts are respectively provided at the front and rear ends of the inner screen frame. The front positioning shaft is located in the short waist-shaped hole of the outer screen frame and is fixed on the outer screen frame by locking screws, and the rear positioning shaft is located in the long waist-shaped hole of the outer screen frame and passes through an angle with the outer screen frame. The locker is connected; the screen frame is located directly above the inner screen frame, two vibration transmission beams are arranged on the bottom side of the screen frame, and a transfer shaft is provided in the middle of the screen frame, and the The two ends of the intermediate shaft are connected to the inner screen frame through hinges, and the two sides of the screen frame are connected to the inner screen frame through four return springs; the screen is installed on the screen frame; The lifting lugs are located on the top surface of both sides of the outer screen frame and are fixedly connected with the outer screen frame; The transverse vibration excitation device includes a transverse drive motor, a commutator, a left transverse drive mechanism, a right transverse drive mechanism, a transverse drive shaft and a transverse vibration chain, and the transverse drive motor is connected to the commutator through a coupling There are two groups of the transverse vibration chains, which are arranged symmetrically on the square connection plate of the top bracket; the output shaft on the left side of the commutator is connected with the transverse vibration chain through the left transverse drive mechanism, and the right side of the commutator The output shaft on the side is connected to the transverse transmission shaft through a universal coupling; the transverse transmission shaft is installed on the square connecting plate through two transverse bearing seats, and the right end of the transverse transmission shaft is connected to the transverse vibration chain through the right transverse drive mechanism. connected; The structure of the left lateral drive mechanism is exactly the same as that of the right lateral drive mechanism, and they are symmetrically arranged on the square connecting plate of the top bracket. The right lateral drive mechanism includes an adjustable eccentric wheel, a drive link, a slider assembly and an Ω Shaped guide rail, the adjustable eccentric wheel is installed on the right end of the transverse transmission shaft, and is connected with the transverse transmission shaft through a flat key, and a slidable hinge is provided on the outside of the adjustable eccentric wheel, and the slidable hinge and the movable The eccentric adjustment wheels are connected by locking screws; one end of the drive link is connected with the adjustable eccentric wheel through a slidable hinge, and the other end is connected with the slider assembly through a hinge; the slider The component is connected with the Ω-shaped guide rail through a linear bearing, and the Ω-shaped guide rail is fixedly installed on the slider support at the bottom of the top bracket, and anti-collision blocks are provided at both ends of the Ω-shaped guide rail; The transverse vibration chain includes a first transverse link, a second transverse link, a third transverse link and a transverse lug, and the bottom of the first transverse link is fixed on the left transverse drive mechanism or the right On the slider assembly of the transverse drive mechanism, the top of the first transverse link is connected with the second transverse link through the first transverse rotation pair; the second transverse link and the third transverse link are connected through the second transverse rotation pair; the third transverse connecting rod and the transverse ear seat are connected through the third transverse rotation pair; the transverse ear seat is fixed and installed on the outer screen frame by screws; the first transverse rotation pair, the second The axes of the second transverse rotation pair and the third transverse rotation pair are parallel to each other; The auxiliary limiting chain includes a double ear base, a limiting chain and a top connecting plate, and the double ear base is fixed and installed on the connecting beam of the outer screen frame by screws; the limiting chain has two groups and is symmetrical Arranged between the double-ear base and the top connection plate; the top connection plate is fixedly connected with the auxiliary support beam of the top bracket; The limit chain includes a first limit link, a second limit link and a limit lug, and the bottom of the first limit link is connected to the double ear base through the first limit rotation pair , the top of the first limiting connecting rod is connected with the second limiting connecting rod through the second limiting rotating pair; the second limiting connecting rod is connected with the limiting ear seat through the third limiting rotating pair; The limiting lugs are connected to the top connecting plate through screws; the axes of the first limiting rotating pair, the second limiting rotating pair and the third limiting rotating pair are parallel to each other. 2. A two-translation-rotation three-degree-of-freedom hybrid vibrating screen according to claim 1, characterized in that: the rotary vibration excitation device includes a rotary drive motor, an excitation cam, and a cam transmission shaft. The rotary drive motor is fixedly installed on the bottom surface of the inner screen frame, and the rotary drive motor is connected with the cam transmission shaft through a coupling; the cam transmission shaft is installed on the bottom surface of the inner screen frame through two rotary bearing seats; There are two vibration-exciting cams, which are arranged symmetrically at both ends of the cam drive shaft, and the outer edge surfaces of the vibration-exciting cams keep in contact with the vibration transmission beams at the bottom of the screen frame. 3. A two-translation-rotation three-degree-of-freedom hybrid vibrating screen according to claim 1, characterized in that: the angle locker includes an outer rod, an inner sliding rod and an adjusting bolt, and the outer rod One end is connected with the rear positioning shaft of the inner screen frame through a screw, and the other end is provided with a U-shaped groove; one end of the inner sliding rod is placed in the U-shaped groove of the outer rod, and connected with the outer rod through an adjusting bolt , the other end of the inner sliding rod is connected with the outer screen frame through a hinge.