Toggle plate tensioning device of jaw crusher

Abstract

The utility model relates to the technical field of jaw crushers, in particular to a toggle plate tensioning device of a jaw crusher, which is characterized by comprising a mounting seat, a hydraulic cylinder, a pull rod, an elastic component and a movable seat, the mounting seat is mounted on a rack, the movable seat is arranged between the lower part of a movable jaw and the mounting seat, and the hydraulic cylinder is hinged between the mounting seat and the movable seat; one end of the pull rod is hinged to the lower portion of the movable jaw, the other end of the pull rod extends into an inner cavity of the movable base and is elastically connected with the movable base through an elastic assembly, and the elastic assembly is used for always applying elastic acting force to the pull rod in the direction away from the side of the movable jaw. According to the utility model, the impact on the hydraulic cylinder in the production process can be reduced, the service life is prolonged, the use cost is reduced, manual tensioning adjustment is not needed in the whole crushing gap adjustment process, manpower can be liberated, the labor cost is reduced, meanwhile, the shutdown time caused by the adjustment of the crushing gap can be reduced, and the overall crushing yield can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to jaw crusher technical field, and specifically relates to an elbow plate tensioning device of jaw crusher. BACKGROUND

[0002] In the current jaw crusher, the jaw crusher is through the eccentric shaft that passes the dynamic jaw, the elbow plate that supports in the dynamic jaw lower part and the frame constitute the connecting rod mechanism, the work process is through the swing of dynamic jaw and tight in the dynamic jaw and static jaw plate between material crushing material is realized, the material after crushing is discharged from the crushing gap between the dynamic jaw and the static jaw plate, the dynamic jaw is pulled tight with the dynamic jaw, the frame through the pull rod installed in the lower part of the elbow plate in the working process, the pull rod is loaded in two ways at present, one way is that the pull rod is loaded by the spring, one end of the spring is fixed on the frame of the jaw crusher, the pull rod passes through the middle of the spring, the other end is locked by the spring acting on the pull rod with the help of the nut installed on the end of the pull rod, the spring is compressed through the movement of the nut along the pull rod, the nut needs to be loosened every time the discharge gap between the dynamic jaw and the static jaw plate is adjusted, then the spring is compressed again by the locking nut after adjusting the crushing discharge gap, especially when crushing hard material, the discharge gap needs to be adjusted frequently, it is difficult to loosen and lock the spring, it needs a large force and special tools, the process is time-consuming and laborious, the labor cost of maintenance is high, the other way is that the pull rod is loaded by the hydraulic cylinder, the piston bears high frequency and repeated expansion and contraction in the working process of the hydraulic cylinder, the piston produces a large impact on the inner wall of the cylinder body every time the piston expands and contracts, the piston is prone to friction and impact heating, the sealing element is easy to damage, resulting in short service life of the hydraulic cylinder, frequent replacement and high replacement cost. SUMMARY

[0003] The utility model wants to solve the technical problem to provide a kind of elbow plate tensioning device of jaw crusher, which can reduce the impact on hydraulic cylinder in production process, improve service life, reduce use cost, without manual tensioning adjustment during the whole crushing gap adjustment process, can liberate manpower and reduce labor cost, while reducing the downtime due to adjusting crushing gap, which is beneficial to improve the overall crushing yield.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: an elbow plate tensioning device of jaw crusher, comprising a mounting seat, a hydraulic cylinder, a pull rod, an elastic assembly and a movable seat, the mounting seat is fixedly installed on the frame, the movable seat is arranged between the lower part of the dynamic jaw and the mounting seat, at least one hydraulic cylinder is hinged between the mounting seat and the movable seat, one end of the pull rod is hinged with the lower part of the dynamic jaw, the other end of the pull rod passes through the first through hole on one end of the movable seat and extends into the inner cavity of the movable seat, and is elastically connected with the movable seat through the elastic assembly, the elastic assembly is used to always exert an elastic force on the pull rod towards the side away from the dynamic jaw.

[0005] Further, the elastic assembly comprises a stopper, a compression spring, a pressing plate and at least one nut which are sequentially sleeved on the pull rod from the side of the driven jaw to the side of the movable seat, the stopper is fixedly installed on the pull rod and located outside the movable seat, the outer diameter of the stopper is greater than the inner diameter of the first through hole, the compression spring, the pressing plate and the nut are arranged in the inner cavity of the movable seat, the pressing plate is provided with a second through hole through which the pull rod passes, one end of the compression spring abuts against the inner bottom surface of the movable seat and the other end abuts against the pressing plate, the nut is threadedly connected with the pull rod, and the outer diameter of the nut is greater than the inner diameter of the second through hole.

[0006] Further, one side surface of the pressing plate is fixedly provided with an annular positioning protrusion embedded in the opening of one end of the compression spring, and the inner bottom surface of the movable seat is fixedly provided with an annular positioning seat embedded in the opening of the other end of the compression spring, and the annular positioning seat is provided with a third through hole through which the pull rod passes.

[0007] Further, the pull rod comprises a hinged seat and a screw rod, one end of the screw rod is threadedly connected with the hinged seat, the other end of the screw rod is threadedly connected with the nut, and the stopper is arranged on the screw rod and abuts against the hinged seat.

[0008] Further, the other end of the movable seat is provided with a fourth through hole.

[0009] Further, the movable seat has a square frame structure and comprises a front side plate, a left side plate, a rear side plate and a right side plate which are sequentially and fixedly connected, and the inner cavity is formed between the front side plate, the left side plate, the rear side plate and the right side plate.

[0010] Further, the hydraulic cylinders are two and symmetrically arranged on the left and right sides of the movable seat, the tail part of the cylinder body of the hydraulic cylinder is hingedly connected with the mounting seat, and the end part of the piston rod of the hydraulic cylinder is hingedly connected with the movable seat.

[0011] Further, the hydraulic cylinders are connected with the hydraulic control system, the hydraulic control system comprises a first connecting oil way, a second connecting oil way, a third connecting oil way, a fourth connecting oil way, a flow dividing and collecting valve and two hydraulic locks, the flow dividing and collecting valve is arranged on the first connecting oil way and connected with the first oil ports of the two hydraulic locks, the second oil ports of the two hydraulic locks are respectively connected with the rod cavity oil ports of the two hydraulic cylinders through corresponding second connecting oil ways, the rodless cavity oil ports of the two hydraulic cylinders are respectively connected with the third oil ports of the two hydraulic locks through corresponding third connecting oil ways, and the fourth oil ports of the two hydraulic locks are connected with the fourth connecting oil way.

[0012] Further, a limiting plate is arranged below the tail part of the cylinder body of the hydraulic cylinder, and the limiting plate is fixedly connected with the mounting seat.

[0013] Further, the anti-swing seat fixedly installed on the rack comprises a top plate and two anti-swing plates, the two anti-swing plates are fixedly arranged at the lower end surface of the top plate, the movable seat is arranged between the two anti-swing plates, and the outer surfaces of the left and right sides of the movable seat are both fixedly provided with a baffle, and a gap is arranged between the baffle and the corresponding anti-swing plate.

[0014] From the above description, the elbow plate tensioning device of the jaw crusher has the following beneficial effects: through the setting of the elastic assembly, the elastic assembly can be compressed and reset with the swing of the moving jaw in the production process of the jaw crusher, so as to keep the tension of the elbow plate, the pressure in the hydraulic cylinder is kept constant, and the piston in the hydraulic cylinder only moves slightly or does not move, which is beneficial to reduce the impact of the piston in the hydraulic cylinder on the cylinder body in the production process, thereby improving the service life of the hydraulic cylinder and reducing the equipment use cost; through the setting of the hydraulic cylinder, in the process of adjusting the crushing gap of the jaw crusher, the extension or retraction of the hydraulic cylinder piston rod is controlled to drive the movable seat to move, and the moving jaw is driven to swing correspondingly under the linkage of the pull rod and the elastic assembly, so that the subsequent adjustment of the elbow plate can be quickly realized, and the adjustment of the crushing gap is realized, in the whole crushing gap adjustment process, manual tensioning adjustment is not needed, manpower can be liberated, and labor cost is reduced, at the same time, the downtime caused by adjusting the crushing gap can be reduced, which is beneficial to improve the overall crushing yield. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic view of the elbow plate tensioning device of the jaw crusher.

[0016] Figure 2 It is a structure schematic view of the elbow plate tensioning device of the jaw crusher.

[0017] Figure 3 It is a three-dimensional structure schematic view of the movable seat.

[0018] Figure 4 It is a control principle diagram of the hydraulic cylinder.

[0019] Figure 5 It is a use state schematic view of the elbow plate tensioning device of the jaw crusher.

[0020] In the figure: 1 - mounting seat; 2 - hydraulic cylinder; 3 - pull rod; 31 - hinged seat; 32 - screw rod; 4 - elastic assembly; 41 - stop block; 42 - compression spring; 43 - pressing plate; 431 - annular positioning protrusion; 44 - nut; 5 - movable seat; 51 - front side plate; 511 - first through hole; 52 - left side plate; 53 - rear side plate; 531 - fourth through hole; 54 - right side plate; 55 - annular positioning seat; 551 - third through hole; 56 - baffle; 61 - rack; 62 - moving jaw; 71 - first connecting oil way; 72 - second connecting oil way; 73 - third connecting oil way; 74 - fourth connecting oil way; 75 - shunt collector valve; 76 - hydraulic lock; 8 - limiting plate; 9 - anti-swing seat; 91 - top plate; 92 - anti-swing plate. DETAILED DESCRIPTION

[0021] The utility model will be further described below through specific embodiments.

[0022] As Figures 1 to 5 shown, the utility model discloses a toggle plate tensioning device of jaw crusher, including mounting seat 1, hydraulic cylinder 2, pull rod 3, elastic assembly 4 and movable seat 5, mounting seat 1 is fixedly installed on the rack 61, movable seat 5 is located between the lower part of moving jaw 62 with mounting seat 1, at least one hydraulic cylinder 2 is hinged between mounting seat 1 with movable seat 5, one end of pull rod 3 is hinged with the lower part of moving jaw 62, the other end of pull rod 3 passes through the first through hole 511 on one end of movable seat 5 and extends into the inner chamber of movable seat 5 and is connected with movable seat 5 through elastic assembly 4, and elastic assembly 4 is used to always keep exerting an elastic force on pull rod 3 towards the side direction away from moving jaw 62.

[0023] through the setting of elastic assembly 4, in the production process of jaw crusher, elastic assembly 4 can be adaptively compressed and released reset along with the swing of moving jaw 62 to keep the tension of toggle plate, and the pressure in hydraulic cylinder 2 keeps constant, and the piston in hydraulic cylinder 2 only makes slight movement or does not move, which is favorable for reducing the impact of the piston in hydraulic cylinder 2 on cylinder body in the production process, thereby improving the service life of hydraulic cylinder 2 and reducing the equipment use cost, through the setting of hydraulic cylinder 2, in the process of adjusting the crushing gap of jaw crusher, by controlling the extension or retraction of the piston rod of hydraulic cylinder 2, movable seat 5 is driven to move, and moving jaw 62 is driven to swing correspondingly under the linkage of pull rod 3 and elastic assembly 4, so that the subsequent adjustment of toggle plate can be quickly realized, and the adjustment of crushing gap can be realized, in the whole crushing gap adjustment process, manual tensioning adjustment is not needed, which can liberate manpower and reduce labor cost, and the time of shutdown due to adjusting the crushing gap can be reduced, which is favorable for improving the overall crushing output.

[0024] Correspondingly, a first pin is provided between one end of the pull rod 3 and the lower part of the moving jaw 62 to achieve a hinge connection between the two. In addition, a first cotter pin is inserted at both ends of the first pin to prevent the first pin from falling off.

[0025] Correspondingly, the elastic component 4 includes a stop block 41, a compression spring 42, a pressure plate 43, and at least one nut 44, which are sequentially sleeved on the pull rod 3 from the side of the movable jaw 62 to the side of the movable seat 5. The stop block 41 is fixedly installed on the pull rod 3 and located outside the movable seat 5. The outer diameter of the stop block 41 is larger than the inner diameter of the first through hole 511. The compression spring 42, the pressure plate 43, and the nut 44 are all located in the inner cavity of the movable seat 5. The pressure plate 43 is provided with a second through hole through which the pull rod 3 can pass. One end of the compression spring 42 abuts against the inner bottom surface of the movable seat 5 and the other end abuts against the pressure plate 43. The nut 44 is threadedly connected to the pull rod 3. The outer diameter of the nut 44 is larger than the inner diameter of the second through hole. In this way, the compression spring 42 can always apply an elastic force to the pull rod 3 in a direction away from the moving jaw 62, and at the same time ensure the stability of the elastic connection between the pull rod 3 and the movable seat 5. In addition, preferably, there are two nuts 44, which can better play the role of preventing loosening.

[0026] Preferably, the compression spring 42 is a metal spring or an elastic element made of rubber.

[0027] In addition, an annular positioning protrusion 431 is fixedly provided on one side surface of the pressure plate 43 and embedded in the opening at one end of the compression spring 42. An annular positioning seat 55 is fixedly provided on the inner bottom surface of the movable seat 5 and embedded in the opening at the other end of the compression spring 42. The annular positioning seat 55 is provided with a third through hole 551 through which the pull rod 3 can pass. In this way, the compression spring 42 can be positioned accordingly and the stability of the compression spring 42 during installation can be effectively ensured.

[0028] The pull rod 3 includes a hinge seat 31 and a screw 32. One end of the screw 32 is threadedly connected to the hinge seat 31, and the other end of the screw 32 is threadedly connected to the nut 44. The stop block 41 is disposed on the screw 32 and abuts against the hinge seat 31. Correspondingly, the outer diameter of the hinge seat 31 is larger than the outer diameter of the screw 32. One end of the hinge seat 31 is provided with a threaded hole. One end of the screw 32 has a first external thread section on its outer surface that is threaded with the threaded hole. The other end of the screw 32 has a second external thread section on its outer surface that is threaded with the nut 44. In other embodiments, the hinge seat 31 and the screw 32 are fixedly connected and integrally formed. In addition, the outer circumferential surface of the stop block 41 is provided with a groove. The stop block 41 is fitted onto the screw 32 through the groove and locked onto the screw 32 by fasteners.

[0029] Furthermore, when the tension of the hydraulic cylinder 2 on the movable seat 5 is less than or equal to the elastic force of the compression spring 42, the stop block 41 abuts against the hinge seat 31 and the movable seat 5 simultaneously. When the tension of the hydraulic cylinder 2 on the movable seat 5 is greater than the elastic force of the compression spring 42, the stop block 41 contacts the hinge seat 31 and separates from the mounting seat 1. During the production process of the jaw crusher, only the compression spring 42 is periodically compressed and released and reset as the moving jaw 62 swings, while the mounting seat 1 and the stop block 41 are always separated and do not contact each other.

[0030] In addition, a fourth through hole 531 is provided on the other end of the movable seat 5, and the inner diameter of the fourth through hole 531 is larger than the outer diameter of the screw 32.

[0031] Preferably, there are two hydraulic cylinders 2 symmetrically arranged on the left and right sides of the movable seat 5. The tail of the cylinder body of the hydraulic cylinder 2 is hinged to the mounting base 1, and the piston rod end of the hydraulic cylinder 2 is hinged to the movable seat 5. Correspondingly, a second pin is provided between the tail of the cylinder body of the hydraulic cylinder 2 and the mounting base 1 to realize the hinge between the two. In addition, second cotter pins are inserted at both ends of the second pin to prevent the second pin from falling off. Third pins are fixed on both the left and right sides of the movable seat 5. The piston rod end is sleeved on the corresponding third pin to achieve a hinge connection between them. Furthermore, a fixing plate is installed on the outer end of the third pin to prevent the piston rod end of the hydraulic cylinder 2 from detaching from the third pin. Additionally, the hydraulic cylinder 2 is connected to a hydraulic control system, which includes a first connecting oil passage 71, a second connecting oil passage 72, a third connecting oil passage 73, a fourth connecting oil passage 74, a flow divider / combiner valve 75, and two hydraulic locks 76. The flow divider / combiner valve 75 is installed on the first connecting oil passage 71. The hydraulic lock 75 is connected to the first oil port of each of the two hydraulic locks 76. The second oil ports of the two hydraulic locks 76 are connected to the rod-side oil ports of the two hydraulic cylinders 2 via the corresponding second connecting oil passages 72. The rodless-side oil ports of the two hydraulic cylinders 2 are connected to the third oil ports of the two hydraulic locks 76 via the corresponding third connecting oil passages 73. The fourth oil ports of the two hydraulic locks 76 are connected to the fourth connecting oil passages 74. Thus, the hydraulic oil can be evenly distributed into the rod-side chambers of the two hydraulic cylinders 2 through the diversion and collection valve 75, ensuring that the two hydraulic cylinders 2 retract synchronously, thereby achieving a balance of force on the left and right sides of the mounting base 1. The two hydraulic locks 76 facilitate pressure holding for the two hydraulic cylinders 2. In this way, during the jaw crusher production process, the piston of the hydraulic cylinder 2 can move only slightly or not at all, reducing the impact of the piston on the cylinder body during production, thereby increasing the service life of the hydraulic cylinder 2 and reducing the operating cost of the equipment.

[0032] In addition, a limiting plate 8 is provided below the tail of the cylinder body of the hydraulic cylinder 2. The limiting plate 8 is fixedly connected to the mounting base 1. When the hydraulic cylinder 2 pushes the movable seat 5 forward to push the moving jaw 62 forward, the limiting plate 8 can prevent the hydraulic cylinder 2 from falling downward.

[0033] In addition, the toggle plate tensioning device also includes an anti-sway seat 9 fixedly installed on the frame 61. The anti-sway seat 9 includes a top plate 91 and two anti-sway plates 92. The two anti-sway plates 92 are fixedly disposed at intervals on the lower end face of the top plate 91. The movable seat 5 is disposed between the two anti-sway plates 92. Baffles 56 are also fixedly provided on the outer surfaces of the left and right sides of the movable seat 5. There is a gap between the baffles 56 and the anti-sway plate 92 on the corresponding side. Thus, the anti-sway seat 9 can play a corresponding anti-sway limiting role to prevent the movable seat 5 from swinging significantly to the left and right sides during the operation of the jaw crusher, effectively ensuring the normal use of the hydraulic cylinders 2 located on the left and right sides of the movable seat 5.

[0034] Correspondingly, the movable seat 5 has a square frame structure and includes a front side plate 51, a left side plate 52, a rear side plate 53, and a right side plate 54 that are fixedly connected end to end in sequence. The front side plate 51, the left side plate 52, the rear side plate 53, and the right side plate 54 enclose the inner cavity. Correspondingly, the first through hole 511 is provided on the front side plate 51, the fourth through hole 531 is provided on the rear side plate 53, the annular positioning seat 55 is fixedly provided on the inner side of the front side plate 51, and the two baffles 56 are respectively fixedly provided on the outer side of the left side plate 52 and the right side plate 54.

[0035] The above are only some specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A toggle tensioning device for a jaw crusher, characterised in that: The device comprises a mounting base, a hydraulic cylinder, a pull rod, an elastic assembly and a movable base, the mounting base is fixedly installed on a rack, the movable base is arranged between the lower part of the moving jaw and the mounting base, at least one hydraulic cylinder is hinged between the mounting base and the movable base, one end of the pull rod is hinged with the lower part of the moving jaw, the other end of the pull rod passes through a first through hole on one end of the movable base and extends into the inner cavity of the movable base and is elastically connected with the movable base through the elastic assembly, and the elastic assembly is used for always applying an elastic force to the pull rod towards the side away from the moving jaw.

2. A toggle tensioning device for a jaw crusher as claimed in claim 1, characterised in that: The elastic assembly comprises a stopper, a compression spring, a pressing plate and at least one nut which are sequentially sleeved on the pull rod from the side of the moving jaw to the side of the movable base, the stopper is fixedly installed on the pull rod and located outside the movable base, the outer diameter of the stopper is larger than the inner diameter of the first through hole, the compression spring, the pressing plate and the nut are arranged in the inner cavity of the movable base, the pressing plate is provided with a second through hole through which the pull rod passes, one end of the compression spring is in abutment with the inner bottom surface of the movable base and the other end is in abutment with the pressing plate, the nut is threadedly connected with the pull rod, and the outer diameter of the nut is larger than the inner diameter of the second through hole.

3. A toggle tensioning device for a jaw crusher as claimed in claim 2, characterised in that: One side surface of the pressing plate is fixedly provided with an annular positioning protrusion embedded in the opening of one end of the compression spring, and the inner bottom surface of the movable base is fixedly provided with an annular positioning seat embedded in the opening of the other end of the compression spring, and the annular positioning seat is provided with a third through hole through which the pull rod passes.

4. A toggle tensioning device for a jaw crusher as claimed in claim 2, characterised in that: The pull rod comprises a hinged seat and a screw rod, one end of the screw rod is threadedly connected with the hinged seat, the other end of the screw rod is threadedly connected with the nut, and the stopper is arranged on the screw rod and in abutment with the hinged seat.

5. A toggle tensioning device for a jaw crusher as claimed in claim 1, characterised in that: The other end of the movable base is provided with a fourth through hole.

6. A toggle tensioning device for a jaw crusher as claimed in claim 1, characterised in that: The movable base has a square box structure and comprises a front side plate, a left side plate, a rear side plate and a right side plate which are sequentially and fixedly connected, and the inner cavity is formed between the front side plate, the left side plate, the rear side plate and the right side plate.

7. A toggle tensioning device for a jaw crusher as claimed in claim 1, characterised in that: The hydraulic cylinders are two and symmetrically arranged on the left and right sides of the movable base, the tail part of the cylinder body of the hydraulic cylinder is hinged with the mounting base, and the end part of the piston rod of the hydraulic cylinder is hinged with the movable base.

8. A toggle tensioning device for a jaw crusher as claimed in claim 7, characterised in that: The hydraulic cylinders are connected with a hydraulic control system, the hydraulic control system comprises a first connecting oil way, a second connecting oil way, a third connecting oil way, a fourth connecting oil way, a flow dividing and collecting valve and two hydraulic locks, the flow dividing and collecting valve is arranged on the first connecting oil way and connected with the first oil ports of the two hydraulic locks, the second oil ports of the two hydraulic locks are respectively connected with the rod cavity oil ports of the two hydraulic cylinders through the corresponding second connecting oil ways, the rodless cavity oil ports of the two hydraulic cylinders are respectively connected with the third oil ports of the two hydraulic locks through the corresponding third connecting oil ways, and the fourth oil ports of the two hydraulic locks are connected with the fourth connecting oil way.

9. A toggle tensioning device for a jaw crusher as claimed in claim 1, characterised in that: The tail part of the cylinder body of the hydraulic cylinder is provided with a limiting plate, and the limiting plate is fixedly connected with the mounting base.

10. A toggle tensioning device for a jaw crusher as claimed in claim 1, characterised in that: The anti-swing seat is fixedly installed on the frame, and comprises a top plate and two anti-swing plates, which are fixedly arranged at the lower end surface of the top plate and are spaced apart from each other. The movable seat is arranged between the two anti-swing plates, and the outer surfaces of the left and right sides of the movable seat are each fixedly provided with a baffle, and a gap is arranged between the baffle and the corresponding anti-swing plate.

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