CN112588577B

CN112588577B - Double-main-beam double-drive large-scale flip-flow screen

Info

Publication number: CN112588577B
Application number: CN202011500573.2A
Authority: CN
Inventors: 李松奕; 王宏利; 张伟; 李中昆; 赵振龙
Original assignee: Tangshan Landsky Technology Co ltd
Current assignee: Tangshan Landsky Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-04-12
Anticipated expiration: 2040-12-17
Also published as: CN112588577A

Abstract

The application discloses two girder dual drive large-scale gallows sieves, relate to the technical field of shale shaker equipment, it includes the support subassembly, there is the sieve case body through damping spring elastic connection on the support subassembly, transversely set firmly the drive roof beam between the both sides at sieve case body middle part, the drive roof beam interval is provided with the even number, set firmly a plurality of box vibration exciters on the drive roof beam, through the transmission shaft transmission between two adjacent arbitrary adjacent box vibration exciters, one side of support subassembly is provided with the supporting component, set firmly the drive assembly who is used for driving box vibration exciter motion on the supporting component, the drive assembly includes the drive assembly with the drive roof beam one-to-one, be connected through the connecting piece between the box vibration exciter of one side wherein on drive roof beam of drive assembly and same. This application has the atress that has reduced the drive beam, and then has reduced the cracked appearance of drive beam, has prolonged the drive beam and has spread the life's of sieve effect.

Description

Double-main-beam double-drive large-scale flip-flow screen

Technical Field

The application relates to the technical field of vibrating screen equipment, in particular to a double-main-beam double-drive large-scale flip-flow screen.

Background

The flip-flow screen is mainly used for material classification in coal, mining industry, metallurgy and other industries. In recent years, in order to adapt to the development status of continuous new construction and extension of large coal preparation plants and ore dressing plants in China, the large-scale relaxation sieves for material classification are gradually developed in the direction of large scale, and the market demand of the large-scale relaxation sieves with the treatment capacity of thousands of tons per hour is more and more increased. The span of the relaxation screen is a main factor determining the throughput, and therefore, in a sense, the enlargement of the relaxation screen is the enlargement of the span of the screen machine. With the increase of the span of the screen machine, the dynamic stress of parts such as cross beams, side plates, driving beams and the like of the screen machine during working is increased by multiple times, so that the large-scale relaxation screen puts higher requirements on the strength and the rigidity of the screen machine.

However, in the industries of coal, mining industry, metallurgy and the like, the large-scale relaxation sieve for material classification has the problem that the driving beam of the sieving machine is easy to break due to the fact that the driving beam is stressed greatly because the exciting force is large.

Disclosure of Invention

In order to reduce the atress of drive beam, this application provides a two girder dual drive large-scale relaxation sieves.

The application provides a two girder dual drive large-scale relaxation sieves adopts following technical scheme:

the double-girder double-drive large-scale relaxation sieve comprises a support assembly, wherein a sieve box body is elastically connected onto the support assembly through a damping spring, a driving beam is transversely and fixedly arranged between two sides of the middle of the sieve box body, an even number of driving beams are arranged at intervals, a plurality of box type vibration exciters are fixedly arranged on the driving beam, any two adjacent box type vibration exciters are driven through a transmission shaft, a supporting assembly is arranged on one side of the support assembly, a driving assembly used for driving the box type vibration exciters to move is fixedly arranged on the supporting assembly, the driving assembly comprises driving assemblies in one-to-one correspondence with the driving beams, and the driving assemblies are connected with the box type vibration exciters on one side of the same driving beam through connecting pieces.

Through adopting above-mentioned technical scheme, adopt many drive beam driven mode, distribute the required total exciting force of sieve case body, reduced the atress of drive beam, and then reduced the cracked appearance of drive beam, prolonged the life of drive beam and relaxation sieve, simultaneously, the designer of being convenient for adjusts the quantity of drive beam and the quantity of box vibration exciter according to the exciting force of the model of relaxation sieve and box vibration exciter, is favorable to the maximization and the serialization development of relaxation sieve.

Preferably, a forced synchronization assembly for keeping the two driving assemblies in synchronous motion is arranged between any two adjacent groups of driving assemblies.

Through adopting above-mentioned technical scheme, force setting up of synchronous subassembly to make and keep the state to box vibration exciter synchronous drive between the multiunit drive assembly, reduced the appearance of the box vibration exciter on the different influence sieve case bodies normal work's of box vibration exciter on the exciting force of sieve case body condition.

Preferably, the driving assembly comprises a driving shaft which is rotatably connected to the supporting assembly, the driving shaft is stably connected with a driving wheel which is coaxially arranged with the driving shaft, the supporting assembly is provided with a driving motor, an output shaft of the driving motor is stably connected with a driving wheel which is coaxially arranged with the driving motor, a driving belt is arranged between the driving wheel and the driving wheel, and the driving shaft is connected to the connecting piece.

Through adopting above-mentioned technical scheme, realized the drive to the drive shaft through belt drive's mode, because driving belt has certain elasticity, can alleviate impact and vibration load, operate steadily, the noise is less.

Preferably, the driving assembly comprises a driving shaft which is rotatably connected to the supporting assembly, the driving shaft is stably connected with a driving wheel which is coaxially arranged with the driving shaft, the supporting assembly is rotatably connected with a driving wheel, a driving belt is arranged between the driving wheel and the driving wheel, a driving motor for driving the driving wheel to rotate is fixedly arranged on the supporting assembly, and the driving shaft is connected to the connecting piece;

the forced synchronization assembly comprises tooth-shaped synchronizing wheels stably connected to the driving shaft, the tooth-shaped synchronizing wheels are arranged coaxially with the driving shaft, and a tooth-shaped synchronous belt meshed with the tooth-shaped synchronizing wheels is arranged between the two tooth-shaped synchronizing wheels.

By adopting the technical scheme, the two driving wheels and the driving shafts in the two adjacent groups of driving assemblies are always kept in a synchronous state by matching the tooth-shaped synchronous belt and the tooth-shaped synchronous wheel, so that the synchronous motion of the two adjacent groups of driving assemblies is realized.

Preferably, the supporting component is provided with a lower supporting plate, the rotating shaft is rotatably connected to the lower supporting plate, the lower supporting plate is provided with an upper supporting plate, the upper supporting plate can move relative to the lower supporting plate to enable the distance between the upper supporting plate and the lower supporting plate to change, and the driving motor is fixedly arranged on the upper supporting plate.

Through adopting above-mentioned technical scheme, adjust the distance between drive wheel and the drive wheel through the position of adjusting the upper support plate, and then the tensioning driving belt of being convenient for.

Preferably, the sieve case body includes outer box and sets up the sieve in outer box, and is different the distance between drive beam and the sieve equals.

Through adopting above-mentioned technical scheme, make the exciter on the different drive beams the exciting force of sieve case body and sieve the same.

Preferably, a forced synchronizing mechanism used for keeping the two in synchronous motion is arranged between any two adjacent groups of the driving assemblies and comprises a linkage wheel stably connected to a driving shaft, the linkage wheel and the driving shaft are coaxially arranged, a synchronous belt is arranged between the linkage wheels, and a control assembly used for enabling the pressure of the synchronous belt between the linkage wheels to be greater than the pressure of the transmission belt between the transmission wheels is arranged on the supporting assembly.

By adopting the technical scheme, the pressure of the synchronous belt on the linkage wheel is greater than the pressure of the transmission belt on the transmission wheel through the control assembly, so that the two driving wheels keep a synchronous running state under the action of the synchronous belt and the two linkage wheels.

Preferably, the control assembly comprises two first tensioning wheels connected to the support assembly in a sliding manner, the first tensioning wheels respectively abut against the inner circumferential surfaces of the two transmission belts, the support assembly is connected to a second tensioning wheel in a sliding manner, and the second tensioning wheel abuts against the inner circumferential surface of the synchronous belt;

the supporting component is provided with a first rotating shaft group corresponding to the two first tensioning wheels respectively, the first rotating shaft group comprises a first inner rotating shaft and a first outer rotating shaft which are coaxially arranged at intervals, the first inner rotating shaft and the first outer rotating shaft are connected through a first torque limiter, the first inner rotating shaft and the first outer rotating shaft are rotatably connected to the supporting component, a first control gear is coaxially and fixedly arranged on the first inner rotating shaft, a first traction wire is wound and fixedly arranged on the first outer rotating shaft, the first traction wire is fastened on the first tensioning wheel, a power motor for driving the first control gear to rotate is fixedly arranged on the supporting component, and the power motor is a unidirectional rotating motor;

the bearing assembly is provided with a second rotating shaft group, the second rotating shaft group comprises a second inner rotating shaft and a second outer rotating shaft which are arranged at a coaxial interval, the second inner rotating shaft and the second outer rotating shaft are connected through a second torque limiter, the second inner rotating shaft and the second outer rotating shaft are rotatably connected onto the bearing assembly, a second control gear is coaxially and fixedly arranged on the second inner rotating shaft, a second traction line is fixedly wound on the second outer rotating shaft, and the second traction line is tightly fastened on a second tensioning wheel.

By adopting the technical scheme, the power motor is started, the second control gear and the second inner rotating shaft rotate to drive the second outer rotating shaft and the second torque limiter to move, so that the second traction wire pulls the second tensioning wheel to move, the tensioning degree of the synchronous belt is increased until the set value of the second torque limiter is reached; after the set value of the second torque limiter is reached, the second outer rotating shaft does not rotate along with the second inner rotating shaft under the control of the second torque limiter; the first control gear rotates under the action of the second control gear to drive the first inner rotating shaft, the first torque limiter and the first outer rotating shaft to rotate, so that the first traction wire pulls the first tensioning wheel to move, the tensioning degree of the transmission belt is increased until the set value of the first torque limiter is reached; after the set value of the first torque limiter is reached, the first outer rotating shaft does not rotate along with the first inner rotating shaft due to the control of the first torque limiter; when the first torque limiter and the second torque limiter reach set values, the power motor stops rotating, and the set value of the second torque limiter is larger than that of the first torque limiter, so that the pressure of the synchronous belt on the linkage wheel is larger than that of the transmission belt on the transmission wheel.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the total exciting force required by the screen box body is distributed by adopting a multi-driving-beam driving mode, so that the stress of the driving beam is reduced, the occurrence of the phenomenon of breakage of the driving beam is further reduced, the service lives of the driving beam and the relaxation screen are prolonged, and meanwhile, designers can conveniently adjust the number of the driving beams and the number of box type vibration exciters according to the type of the relaxation screen and the exciting force of the box type vibration exciters, so that the large-scale and serial development of the relaxation screen is facilitated;

2. the arrangement of the forced synchronization assembly enables the plurality of groups of driving assemblies to keep a state of synchronously driving the box type vibration exciters, so that the situation that the box type vibration exciters on different driving beams have different exciting forces on the screen box body to influence the normal work of the screen box body is reduced;

3. the driving of the driving shaft is realized through a belt transmission mode, and the driving belt has certain elasticity, so that impact and vibration loads can be alleviated, the operation is stable, and the noise is low.

Drawings

Fig. 1 is a schematic overall structure diagram in the first embodiment.

Fig. 2 is a schematic partial structure diagram illustrating a transmission shaft structure according to the first embodiment.

FIG. 3 is a partial schematic structural diagram showing the structure of the supporting assembly, the driving assembly and the forced synchronization assembly in the first embodiment.

Fig. 4 is a partial schematic structural view showing a connection structure between a drive wheel and a drive shaft in the first embodiment.

Fig. 5 is a schematic structural view showing a structure of the forced synchronization mechanism in the second embodiment.

Fig. 6 is a schematic structural view showing a structure of the forced synchronization mechanism in the second embodiment.

Fig. 7 is a partial structural schematic view of a connecting structure between a second tensioning wheel and a supporting vertical plate and a connecting structure between a second winding roller and a second sliding rod in the second embodiment.

Description of reference numerals: 1. a seat assembly; 11. a front support; 12. a rear support; 2. a screen box body; 21. an outer case; 211. connecting a steel frame; 212. a cross beam; 213. lifting the lifting beam; 22. a sieve plate; 221. connecting blocks; 222. a shear spring; 23. a drive beam; 3. a damping spring; 4. a box type vibration exciter; 41. a drive shaft; 5. a support assembly; 51. a supporting seat; 52. a drive support; 53. supporting the bent plate; 54. an upper support plate; 55. a lower support plate; 551. a fixed seat; 56. a lead screw; 57. adjusting the nut; 6. a drive assembly; 61. a drive shaft; 611. a universal joint; 612. a connecting bond; 62. a drive wheel; 621. a connecting lantern ring; 622. a keyway; 623. a connecting screw; 63. a drive motor; 64. a driving wheel; 65. a drive belt; 7. a forced synchronization component; 71. a toothed synchronizing wheel; 72. a toothed synchronous belt; 8. a forced synchronization mechanism; 81. a linkage wheel; 811. a synchronous belt; 82. a support vertical plate; 821. a first sliding groove; 822. a first slide bar; 823. a first limiting sheet; 824. a first rotating shaft; 83. a first tensioning wheel; 831. a first traction wire; 84. supporting a vertical plate; 841. a second sliding groove; 842. a second slide bar; 843. a second limiting sheet; 844. a second rotating shaft; 85. a second tensioning wheel; 851. a second traction wire; 86. a connecting frame; 87. a first set of shafts; 871. a first inner rotating shaft; 8711. a first control gear; 872. a first outer rotating shaft; 8721. a first winding roller; 873. a first torque limiter; 88. a second rotating shaft group; 881. a second inner rotating shaft; 8811. a second control gear; 882. a second outer rotating shaft; 8821. a second winding roller; 883. a second torque limiter; 89. a power motor.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses two girder dual drive large-scale relaxation sieves.

Example one

Referring to fig. 1, the seat assembly 1 includes a seat assembly 1, and the seat assembly 1 includes a front seat 11 and a rear seat 12 spaced apart from each other in a front-to-rear direction. Preceding support 11 and back support 12 slope on be provided with sieve case body 2, sieve case body 2 includes outer box 21, respectively fixedly connected with on two lateral walls of outer box 21 with preceding support 11 and the corresponding connection steelframe 211 of back support 12. Connect between steelframe 211 and front support 11 and the rear support 12 respectively through damping spring 3 elastic connection, damping spring 3 sets up along vertical direction. The outer box 21 is provided with two sieve plates 22, and the two sieve plates 22 are arranged at intervals along the direction perpendicular to the inclination direction of the outer box 21. Two cross beams 212 corresponding to the sieve plate 22 are respectively welded and fixed on two outer side walls of the outer box 21, two sides of the sieve plate 22 are respectively and fixedly connected with connecting blocks 221 penetrating out of the inner side of the outer box 21, and the connecting blocks 221 are elastically connected to the cross beams 212 through shear springs 222.

A plurality of lifting beams 213 are fixed in the outer box 21, and the lifting beams 213 are transversely fixed between two sides of the middle of the outer box 21.

Referring to fig. 1 and 2, the outer box 21 is fixedly provided with two driving beams 23, the driving beams 23 are transversely and fixedly connected between two sides of the middle part of the outer box 21, and two driving beams 23 are arranged at intervals along a direction parallel to the sieve plate 22. Two box-type vibration exciters 4 are fixedly connected to the upper surface of the driving beam 23, and the two box-type vibration exciters 4 are located at two ends of the driving beam 23 in the length direction. The box-type vibration exciter 4 comprises power shafts arranged along the length direction of the driving beam 23 (the power shafts are not shown in the drawing), and a transmission shaft 41 is coaxially fixed between the two power shafts. The specific structure of the box-type vibration exciter 4 is the prior art and is not described in detail herein.

Referring to fig. 1 and 3, a support assembly 5 is disposed on one side of the screen box body 2, the support assembly 5 includes a support base 51 and a driving support 52 fixedly connected to the top end of the support base 51, and the driving support 52 is in a stepped shape. The driving support 52 is fixedly provided with a driving assembly, the driving assembly comprises two groups of driving components 6 corresponding to the two driving beams 23, the two groups of driving components 6 are respectively fixedly arranged on two steps of the driving support 52, and a forced synchronization component 7 for enabling the two groups of driving components 6 to keep synchronous motion is arranged between the two groups of driving components 6.

The driving support 52 is fixedly connected with two sets of supporting members corresponding to the driving assemblies 6 one by one, each supporting member comprises two supporting bent plates 53 which are symmetrically arranged, and a reinforcing transverse plate is fixedly connected between the two supporting bent plates 53. Two support bent plate 53 go up common fixedly connected with lower support plate 55, are provided with backup pad 54 directly over lower support plate 55, go up backup pad 54 and lower support plate 55 and are the rectangular plate body of level setting. The upper support plate 54 and the lower support plate 55 are jointly provided with a lead screw 56 in a penetrating manner, the lead screw 56 is arranged along the vertical direction, four lead screws 56 are arranged at four end angles of the upper support plate 54, and the upper support plate 54 and the lower support plate 55 can move along the vertical direction relative to the lead screw 56. The screw 56 is provided with two sets of locking assemblies corresponding to the upper support plate 54 and the lower support plate 55, each locking assembly comprises a plurality of adjusting nuts 57 which are in threaded connection with the screw 56, the locking assembly corresponding to the lower support plate 55 is used for limiting the movement of the screw 56 in the vertical direction, and the locking assembly corresponding to the upper support plate 54 is used for limiting the movement of the upper support plate 54 in the vertical direction.

The upper surface of the lower supporting plate 55 is fixedly connected with a fixed seat 551, and the driving assembly 6 comprises a driving shaft 61 rotatably connected to the fixed seat 551, wherein the axial direction of the driving shaft 61 is the same as the axial direction of the transmission shaft 41. One end of the driving shaft 61 is in transmission connection with the power shaft of one of the box-type exciters 4 through a universal joint 611, and the driving shaft 61 is stably connected with a driving wheel 62 which is coaxially arranged with the driving shaft.

With reference to fig. 3 and 4, a connecting collar 621 is fixedly connected to one side of the driving wheel 62, a key slot 622 is formed in the connecting collar 621 along the axial direction of the driving wheel 62, and the key slot 622 penetrates through the connecting collar 621 and the driving wheel 62. A connecting key 612 fitted into the key groove 622 is fixedly connected to the outer peripheral surface of the drive shaft 61, and the connecting key 612 is inserted into the key groove 622 to restrict the relative rotation between the drive wheel 62 and the drive shaft 61. A coupling screw 623 is inserted into the coupling collar 621, and the coupling screw 623 is screwed into the drive shaft 61 to restrict the relative movement between the drive wheel 62 and the drive shaft 61 in the axial direction of the drive shaft 61.

The upper support plate 54 is fixedly connected with a driving motor 63, the axial direction of the output shaft of the driving motor 63 is the same as that of the driving shaft 61, and the axial line of the output shaft of the driving motor 63 and the axial line of the driving shaft 61 are positioned on the same vertical plane. The output shaft of the driving motor 63 is stably connected with a driving wheel 64 which is coaxial with the driving motor, and a driving belt 65 is annularly sleeved and pressed between the driving wheel 64 and the driving wheel 62. The connection between the transmission wheel 64 and the output shaft of the drive motor 63 is the same as the connection between the drive shaft 61 and the drive wheel 62 and will not be described in detail. When the transmission ratio between the driving wheel 64 and the driving wheel 62 needs to be adjusted, a worker can replace the driving wheel 64 and the driving wheel 62 with corresponding diameters.

By adjusting the adjusting nut 57 corresponding to the upper support plate 54, the upper support plate 54 is moved to adjust the distance between the upper support plate 54 and the lower support plate 55, so that the distance between the driving wheel 64 and the driving wheel 62 is adjusted to tension the driving belt 65, and then the adjusting nut 57 is tightened to limit the upper support plate 54 to a fixed height.

Referring to fig. 3, the forced synchronizing assembly 7 includes a toothed synchronizing wheel 71 stably connected to the driving shaft 61, the toothed synchronizing wheel 71 is coaxially disposed with the driving shaft 61, and the connection between the toothed synchronizing wheel 71 and the driving shaft 61 is the same as the connection between the driving wheel 62 and the driving shaft 61, and will not be described again. A tooth-shaped synchronous belt 72 matched with the tooth-shaped synchronous wheel 71 is annularly sleeved and pressed between the two tooth-shaped synchronous wheels 71. The toothed synchronous belt 72 and the two toothed synchronous wheels 71 are matched to keep the two driving shafts 61 in a synchronous rotating state, so that the two driving wheels 62 and the two driving shafts 61 are kept in a synchronous rotating state, and the situation that the normal work of the screen box body 2 is influenced due to different exciting forces of the box-type vibration exciters 4 on different driving beams 23 on the screen box body 2 is reduced.

The implementation principle of the double-main-beam double-drive large-scale flip-flow screen in the embodiment of the application is as follows:

two driving motors 63 are started, the driving motors 63 drive the driving wheels 64 to rotate, the driving wheels 62 and the driving shafts 61 rotate under the action of the driving wheels 64 and the driving belts 65, and then the box-type vibration exciters 4 are driven to work through the universal joints 611, so that the screen box body 2 vibrates under the action of the centrifugal force of the box-type vibration exciters 4, the two driving shafts 61 are kept in a synchronous rotating state through the matching of the tooth-shaped synchronous belts 72 and the two tooth-shaped synchronous wheels 71, the total exciting force required by the screen box body 2 is distributed through a double-beam double-driving mode, the stress of the driving beams 23 is reduced, the occurrence of the phenomenon that the driving beams 23 are broken is reduced, the service lives of the driving beams 23 and the relaxation screens are prolonged, meanwhile, a designer can conveniently select the proper number of the box-type vibration exciters 4 and increase and decrease the number of the driving beams 23 by even times according to the model number of the relaxation screens and the exciting force of the box-type vibration exciters 4, is beneficial to the large-scale and serial development of the screening machine.

Example two

Referring to fig. 5, the difference between the two main beam dual-drive large-scale relaxation sieve and the first embodiment is that a forced synchronization mechanism 8 for keeping the two sets of driving assemblies 6 in synchronous motion is arranged between the two sets of driving assemblies 6. The forced synchronization mechanism 8 comprises linkage wheels 81 stably connected to the driving shaft 61, and a synchronization belt 811 is annularly sleeved and compressed between the two linkage wheels 81. The linkage wheel 81 and the driving shaft 61 are connected in the same way as the driving wheel 62 and the driving shaft 61, and the detailed description is omitted.

The drive carriage 52 is provided with a control assembly for making the pressure of the timing belt 811 on the linkage 81 greater than the pressure of the transmission belt 65 on the driving wheel 64.

Referring to fig. 5, 6 and 7, the control assembly includes two supporting risers 82, and the two supporting risers 82 are respectively fixedly connected to the two lower supporting plates 55 of the two sets of driving assemblies 6. The two supporting risers 82 are respectively connected with first tensioning wheels 83 in a sliding manner, the two first tensioning wheels 83 are respectively positioned at the inner sides of the corresponding transmission belts 65 and are abutted and pressed against the inner circumferential surfaces of the transmission belts 65, and the axial direction of the first tensioning wheels 83 is the same as that of the driving shaft 61.

The supporting vertical plate 82 is provided with a first sliding groove 821, the first sliding groove 821 is connected with a first sliding rod 822 matched with the first sliding groove in a sliding mode, the cross section of the first sliding rod 822 is square, and the length direction of the first sliding rod 822 is arranged along the axis direction of the first tensioning wheel 83. First spacing 823 that two intervals set up is fixedly connected with on the first pole 822 that slides, and first spacing 823 is used for restricting the removal of first pole 822 along self length direction that slides. One end of the first sliding rod 822 is fixedly connected with a first rotating shaft 824, and the first tensioning wheel 83 is sleeved outside the first rotating shaft 824 and is rotatably connected with the first rotating shaft 824.

A supporting vertical plate 84 is fixedly connected to the driving support 52, a second tension pulley 85 is connected to the supporting vertical plate 84 in a sliding manner, the second tension pulley 85 is located inside the timing belt 811 and is abutted against and pressed against the inner circumferential surface of the timing belt 811, and the axial direction of the second tension pulley 85 is the same as the axial direction of the first tension pulley 83.

A second sliding groove 841 is formed in the supporting vertical plate 84, a second sliding rod 842 matched with the second sliding groove 841 is connected in the second sliding groove 841 in a sliding manner, the cross section of the second sliding rod 842 is square, and the length direction of the second sliding rod 842 is arranged along the axis direction of the second tension wheel 85. Two second limiting pieces 843 arranged at intervals are fixedly connected to the second sliding rod 842, and the second limiting pieces 843 are used for limiting the movement of the second sliding rod 842 along the length direction of the second sliding rod 842. One end of the second sliding rod 842 is fixedly connected with a second rotating shaft 844, and the second tensioning wheel 85 is sleeved outside the second rotating shaft 844 and is rotatably connected with the second rotating shaft 844.

The control assembly also includes a connecting bracket 86 fixedly attached to the drive mount 52. The connecting frame 86 is provided with two first rotating shaft groups 87 corresponding to the two first tensioning wheels 83 respectively, and the axial direction of the first rotating shaft groups 87 is the same as that of the first tensioning wheels 83. The first shaft group 87 includes a first inner rotating shaft 871 and a first outer rotating shaft 872 which are coaxially and alternately arranged, two opposite ends of the first inner rotating shaft 871 and the first outer rotating shaft 872 are respectively rotatably connected to the connecting frame 86, two opposite ends of the first inner rotating shaft 871 and the first outer rotating shaft 872 are connected through a first torque limiter 873, and the first torque limiter 873 is used for limiting the maximum torque of the first outer rotating shaft 872. A first control gear 8711 is coaxially fixed on the first inner rotating shaft 871, and a first winding roller 8721 is coaxially fixed on the first outer rotating shaft 872. A first pulling wire 831 is wound and fixed on the first winding roller 8721, and one end of the first pulling wire 831, which is back to the first winding roller 8721, is fixedly connected to the first sliding rod 822.

The connecting frame 86 is provided with a second rotating shaft group 88 corresponding to the second tension wheel 85, the axial direction of the second rotating shaft group 88 is the same as the axial direction of the second tension wheel 85, and the second rotating shaft group 88 is positioned between the two first rotating shaft groups 87. The second rotation shaft set 88 includes a second inner rotation shaft 881 and a second outer rotation shaft 882 coaxially and arranged at an interval, two opposite ends of the second inner rotation shaft 881 and the second outer rotation shaft 882 are respectively rotatably connected to the connecting frame 86, two opposite ends of the second inner rotation shaft 881 and the second outer rotation shaft 882 are connected by a second torque limiter 883, the second torque limiter 883 is used for limiting the maximum torque of the second outer rotation shaft 882, and the setting value of the first torque limiter 873 is smaller than the setting value of the second torque limiter 883. A second control gear 8811 is coaxially fixed on the second inner rotating shaft 881, two sides of the second control gear 8811 are engaged with the two first control gears 8711, and a second winding roller 8821 is coaxially fixed on the second outer rotating shaft 882. A second pulling wire 851 is wound around the second winding roller 8821, and one end of the second pulling wire 851, which faces away from the second winding roller 8821, is fixedly connected to the second sliding rod 842.

Fixedly connected with power motor 89 on link 86, power motor 89 is used for driving second interior pivot 881 to rotate, and power motor 89 sets up to one-way rotating electrical machines.

The implementation principle of the above embodiment is as follows:

starting the power motor 89, rotating the second control gear 8811 and the second inner rotating shaft 881 under the action of the power motor 89 to drive the second outer rotating shaft 882, the second torque limiter 883 and the second winding roller 8821 to rotate, winding the second traction wire 851 on the second winding roller 8821, pulling the second tensioning wheel 85 to move, and increasing the tensioning degree of the synchronous belt 811 until the set value of the second torque limiter 883 is reached; after the set value of the second torque limiter 883 is reached, the second external rotating shaft 882 no longer rotates with the second internal rotating shaft 881 due to the control of the second torque limiter 883;

the first control gear 8711 rotates under the action of the second control gear 8811 to drive the first inner rotating shaft 871, the first torque limiter 873, the first outer rotating shaft 872 and the first winding roller 8721 to rotate, so that the first traction wire 831 is wound on the first winding roller 8721 and pulls the first tensioning wheel 83 to move, and the tensioning degree of the transmission belt 65 is increased until the set value of the first torque limiter 873 is reached; after the set value of the first torque limiter 873 is reached, the first outer rotating shaft 872 does not rotate along with the first inner rotating shaft 871 due to the control of the first torque limiter 873; when the first torque limiter 873 and the second torque limiter 883 reach the set values, the power motor 89 stops rotating, and the pressure of the synchronous belt 811 on the coupling wheel 81 is greater than the pressure of the transmission belt 65 on the transmission wheel 64 because the set value of the second torque limiter 883 is greater than the set value of the first torque limiter 873;

when the synchronous belt 811 is loosened after being used for a period of time, the power motor 89 drives the second control gear 8811 to rotate, and further drives the second tensioning wheel 85 to move until the set value of the second torque limiter 883 is reached, and when the second control gear 8811 rotates, the first control gear 8711 is driven to rotate, but because the first torque limiter 873 is in a state of reaching the set value, the first outer rotating shaft 872 does not rotate along with the first inner rotating shaft 871, when the transmission belt 65 is loosened, the tensioning principle is the same, and the details are not repeated.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a two main girder dual drive large-scale relaxation sieves, includes support subassembly (1), there is sieve case body (2) through damping spring (3) elastic connection on support subassembly (1), transversely set firmly drive roof beam (23), its characterized in that between the both sides at sieve case body (2) middle part: the driving beam (23) is provided with an even number of box-type vibration exciters (4) at intervals, the driving beam (23) is fixedly provided with a plurality of box-type vibration exciters (4), any two adjacent box-type vibration exciters (4) are transmitted through a transmission shaft (41), one side of the support assembly (1) is provided with a supporting assembly (5), the supporting assembly (5) is fixedly provided with a driving assembly for driving the box-type vibration exciters (4) to move, the driving assembly comprises driving assemblies (6) which correspond to the driving beam (23) one by one, and the driving assemblies (6) are connected with the box-type vibration exciters (4) on one side of the same driving beam (23) through connecting pieces;

the driving assembly (6) comprises a driving shaft (61) which is rotatably connected to the supporting assembly (5), a driving wheel (62) which is coaxially arranged with the driving shaft (61) is stably connected to the driving shaft (61), a driving motor (63) is arranged on the supporting assembly (5), a driving wheel (64) which is coaxially arranged with the driving motor (63) is stably connected to an output shaft of the driving motor (63), a driving belt (65) is arranged between the driving wheel (64) and the driving wheel (62), and the driving shaft (61) is connected to the connecting piece;

a forced synchronization mechanism (8) used for keeping the two driving assemblies in synchronous motion is arranged between any two adjacent groups of driving assemblies (6), the forced synchronization mechanism (8) comprises a linkage wheel (81) stably connected to the driving shaft (61), the linkage wheel (81) and the driving shaft (61) are coaxially arranged, a synchronous belt (811) is arranged between the two linkage wheels (81), and a control assembly used for enabling the pressure between the linkage wheel (81) and the synchronous belt (811) to be greater than the pressure between the driving belt (65) and the driving wheel (64) is arranged on the supporting assembly (5);

the control assembly comprises two first tensioning wheels (83) connected to the supporting assembly (5) in a sliding mode, the first tensioning wheels (83) are respectively abutted to the inner circumferential surfaces of the two transmission belts (65), a second tensioning wheel (85) is connected to the supporting assembly (5) in a sliding mode, and the second tensioning wheel (85) is abutted to the inner circumferential surface of the synchronous belt (811);

the supporting component (5) is provided with a first rotating shaft group (87) corresponding to the two first tension wheels (83) respectively, the first rotating shaft group (87) comprises a first inner rotating shaft (871) and a first outer rotating shaft (872) which are coaxially arranged at intervals, the first inner rotating shaft (871) and the first outer rotating shaft (872) are connected through a first torque limiter (873), the first inner rotating shaft (871) and the first outer rotating shaft (872) are rotatably connected to the supporting component (5), a first control gear (8711) is coaxially and fixedly arranged on the first inner rotating shaft (871), a first traction wire (831) is wound and fixedly arranged on the first outer rotating shaft (872), the first traction wire (831) is fastened on the first tensioning wheel (83), a power motor (89) for driving the first control gear to rotate is fixedly arranged on the supporting assembly (5), and the power motor (89) is a unidirectional rotating motor;

the bearing component (5) is provided with a second rotating shaft group (88), the second rotating shaft group (88) comprises a second inner rotating shaft (881) and a second outer rotating shaft (882) which are coaxially arranged at intervals, the second inner rotating shaft (881) and the second outer rotating shaft (882) are connected through a second torque limiter (883), the second inner rotating shaft (881) and the second outer rotating shaft (882) are rotatably connected onto the bearing component (5), a second control gear (8811) is coaxially and fixedly arranged on the second inner rotating shaft (881), a second traction wire (851) is fixedly wound on the second outer rotating shaft (882), and the second traction wire (851) is tightly tied on a second tensioning wheel (85).

2. The large double-main-beam double-drive flip-flow screen as claimed in claim 1, is characterized in that: the supporting component (5) is fixedly provided with a lower supporting plate (55), the rotating shaft is rotatably connected to the lower supporting plate (55), an upper supporting plate (54) is arranged on the lower supporting plate (55), the upper supporting plate (54) can move relative to the lower supporting plate (55) to enable the distance between the upper supporting plate (54) and the lower supporting plate (55) to change, and the driving motor (63) is fixedly arranged on the upper supporting plate (54).

3. The large double-main-beam double-drive flip-flow screen as claimed in claim 1, is characterized in that: the sieve box body (2) comprises an outer box body (21) and a sieve plate (22) arranged in the outer box body (21), and is different in that the distance between the driving beam (23) and the sieve plate (22) is equal.