Self-lubricating hydraulic tensioning device of plate feeder

Abstract

The invention belongs to the technical field of tensioning mechanisms of plate type feeders, and particularly relates to a self-lubricating hydraulic tensioning device of a plate type feeder, which comprises an automatic overflow mechanism, a synchronous tensioning correction mechanism, a rack assembly and a plate type conveying assembly, the synchronous tensioning deviation rectifying mechanisms are symmetrically arranged on the rack assembly, and the plate type conveying assembly is rotationally arranged in the synchronous tensioning deviation rectifying mechanisms. The pressure stabilizing assembly and the pressure relief assembly are creatively provided, through the one-way pressure holding valve capable of freely setting the pressure, the pressure of the hydraulic tensioning assembly can be kept stable all the time through automatic liquid feeding and discharging control in the telescopic change process of the hydraulic tensioning assembly, and meanwhile it is guaranteed that the tensioning force of the plate type conveying assembly is stable.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of plate feeder tensioning mechanism, and particularly relates to a self-lubricating hydraulic tensioning device of a plate feeder. BACKGROUND

[0002] The main body of the plate feeder is usually provided with a chain plate or a conveying belt, and the tension of the conveying device during operation should not be too large or too small, so that a tensioning mechanism is required to be arranged at one end to maintain the stability of the tension; the common tensioning mechanisms include gravity hammer type, spring type, hydraulic type and the like; The main disadvantage of the gravity hammer type is that it occupies a large space and the tension is not adjustable; the spring type structure is the simplest, but the actual tension will change with the change of the distance between the two ends of the roller; therefore, the hydraulic type is the relatively most perfect scheme.

[0003] Since the hydraulic cylinders are symmetrically arranged on both sides of the plate conveying assembly, when the heavy object is offset and falls on the conveying device, the tensions on both sides of the conveying device are actually different, and if the extension and retraction of the two hydraulic cylinders are not synchronized, the conveying device is prone to disengaging from the joint part; In addition, the current hydraulic cylinders are mainly controlled to extend and retract, and need to combine with the feedback data of the sensor, so that the structure is generally complex and the cost is generally high. SUMMARY

[0004] In view of the above problems, the present application provides a self-lubricating hydraulic tensioning device of a plate feeder, in order to further simplify the structure, the present application creatively proposes a pressure stabilizing assembly and a pressure relief assembly, through the one-way pressure holding valve which can freely set the pressure, the pressure of the hydraulic tensioning assembly can be always maintained stable through the automatic liquid inlet and outlet control (liquid inlet and overflow) during the extension and retraction of the hydraulic tensioning assembly, and the tension of the plate conveying assembly is also ensured stable. Furthermore, the front and rear cylinders of the two synchronous cylinder bodies are crossed and penetrated, the synchronous piston can realize the synchronous sliding of the two hydraulic rods, and the synchronization of the hydraulic tensioning assemblies on both sides is automatically ensured when the plate conveying assembly is unevenly stressed, so that the problem of roller deflection is avoided.

[0005] The technical scheme adopted by the present application is as follows: the present application provides a self-lubricating hydraulic tensioning device of a plate feeder, which comprises an automatic overflow mechanism, a synchronous tensioning and deviation rectifying mechanism, a rack assembly and a plate conveying assembly, the automatic overflow mechanism is arranged on the rack assembly, the synchronous tensioning and deviation rectifying mechanism is symmetrically arranged on the rack assembly, and the plate conveying assembly is rotatably arranged in the synchronous tensioning and deviation rectifying mechanism. The automatic overflow mechanism comprises a pressure stabilizing assembly and a pressure relief assembly, the pressure relief assembly is arranged in the pressure stabilizing assembly, the synchronous tensioning and deviation rectifying mechanism comprises a hydraulic tensioning assembly, a sliding assembly and a mechanical retaining assembly, the hydraulic tensioning assembly is arranged on the rack assembly, the sliding assembly is arranged on the rack assembly, and the mechanical retaining assembly is arranged on the sliding assembly.

[0006] The automatic overflow mechanism can maintain the pressure of the hydraulic tensioning assembly stable through automatic liquid inlet and outlet control during the expansion and contraction of the hydraulic tensioning assembly, and thus the tensioning force of the plate conveying assembly is stable.

[0007] Further, the pressure stabilizing assembly comprises a T-shaped pipe, a one-way pressure holding valve, a piston blind pipe, a pressure stabilizing piston and a pressure stabilizing spring, the T-shaped pipe is arranged on the rack assembly, the one-way pressure holding valve is arranged at the end of the T-shaped pipe, the piston blind pipe is arranged in the T-shaped pipe in a clamping and sliding manner, the pressure stabilizing piston is arranged in the piston blind pipe in a clamping and sliding manner, the pressure stabilizing piston is provided with a first side window, and the pressure stabilizing spring is arranged between the piston blind pipe and the pressure stabilizing piston.

[0008] The one-way pressure holding valve can maintain the pressure in the T-shaped pipe stable, so that the oil is automatically supplemented when the pressure in the T-shaped pipe is reduced, and the compression amount of the pressure stabilizing spring is relatively stable.

[0009] As preferred, the pressure relief assembly comprises a pressure relief piston, a pressure relief spring, a pressure relief top rod and a pressure relief pipe, the pressure relief piston is arranged in the through hole of the pressure stabilizing piston in a sliding manner, the pressure relief piston is provided with a second side window corresponding to the first side window, one end of the pressure relief pipe is arranged in the through hole of the pressure stabilizing piston, the pressure relief spring is arranged between the pressure relief piston and the pressure relief pipe, the other end of the pressure relief pipe extends to the outside of the T-shaped pipe, and the pressure relief top rod is fixedly connected to the inner side of the piston blind pipe.

[0010] When the internal pressure of the T-shaped pipe is too large, the first side window and the second side window are changed from non-coincidence to coincidence by pushing the pressure relief piston through the pressure relief top rod, so that the oil in the T-shaped pipe is discharged, and the compression amount of the pressure stabilizing spring is relatively stable.

[0011] Further, the hydraulic tensioning assembly comprises a hydraulic cylinder body, a synchronous cylinder body and a hydraulic rod, the hydraulic cylinder body and the synchronous cylinder body are fixedly connected and coaxially arranged, the hydraulic rod is arranged in the center of the hydraulic cylinder body and the synchronous cylinder body in a clamping and sliding manner, the hydraulic rod is provided with a tensioning piston and a synchronous piston, the tensioning piston is arranged in the hydraulic cylinder body in a clamping and sliding manner, and the synchronous piston is arranged in the synchronous cylinder body in a clamping and sliding manner.

[0012] The front and rear cylinders of the two synchronous cylinders cross through, and the synchronous sliding of the two hydraulic rods can be realized by the synchronous piston, so that the synchronization of the hydraulic tensioning assemblies on both sides can be automatically ensured when the plate conveying assembly is unevenly stressed, and the problem of drum deflection can be avoided.

[0013] The area of the synchronous piston is much larger than the area of the piston blind pipe, so the hydraulic tensioning assembly can apply a tensioning force far exceeding the tensioning force provided by the one-way holding valve to the plate conveying assembly.

[0014] Preferably, the sliding assembly comprises a bearing seat, a sliding block and a guide frame, the guide frame is arranged on the rack assembly, the guide frame is provided with a guide rail, the sliding block is arranged on the guide rail in a clamping and sliding manner, and the sliding block is fixedly connected to the two sides of the bearing seat.

[0015] Further preferably, the mechanical holding assembly comprises a holding screw rod and a holding nut, the holding screw rod and the hydraulic rod are fixedly connected to the two sides of the bearing seat, and the holding nut is threadedly connected with the holding screw rod.

[0016] The holding nut is away from the guide frame during normal operation, can rigidly limit the plate conveying assembly when the hydraulic tensioning assembly fails due to leakage, etc., so as to avoid damage to the plate conveying assembly; when the hydraulic tensioning assembly or the automatic overflow mechanism is independently maintained or debugged, the drum can be kept in a tensioning state by locking the holding nut, so as to improve the convenience of debugging and maintenance.

[0017] Further, the rack assembly comprises a main rack, a cylinder support frame and a mounting plate, the cylinder support frame and the guide frame are arranged on the main rack, the mounting plate is arranged between the two cylinder support frames, and the T-shaped pipe and the one-way holding valve are arranged on the mounting plate.

[0018] Further, the plate conveying assembly comprises a drum, a conveying device and a main bearing, the main bearing is arranged on the end shaft of the drum, the main bearing is arranged in the bearing seat, and the conveying device and the drum are in rolling contact.

[0019] The main bearing and the sliding block can adopt a self-lubricating structure with low-pressure oil supply, which slowly but continuously supplements lubricating grease during operation, thereby omitting the step of shutdown maintenance.

[0020] The beneficial effects achieved by the above structure are as follows: (1) The automatic overflow mechanism can maintain the pressure of the hydraulic tensioning assembly stable through automatic liquid inlet and outlet control during the extension and contraction of the hydraulic tensioning assembly, and thus the tensioning force of the plate conveying assembly is stable.

[0021] (2) The one-way pressure maintaining valve can maintain the pressure stability inside the T-shaped pipe, so as to automatically supplement the oil when the pressure in the T-shaped pipe is reduced, thereby maintaining the relative stability of the compression amount of the pressure stabilizing spring.

[0022] (3) When the internal pressure of the T-shaped pipe is too large, the first side window and the second side window are changed from non-coincidence to coincidence by pushing the pressure relief piston through the pressure relief top rod, so as to allow the internal oil of the T-shaped pipe to be discharged, thereby maintaining the relative stability of the compression amount of the pressure stabilizing spring.

[0023] (4) The front and rear cylinders of the two synchronous cylinders are cross-penetrated, and the synchronous piston can realize the synchronous sliding of the two hydraulic rods, thereby automatically ensuring the synchronism of the hydraulic tensioning assemblies on both sides when the plate conveying assembly is unevenly stressed, and avoiding the problem of drum deflection.

[0024] (5) The retaining nut is away from the guide frame during normal operation, which can rigidly limit the plate conveying assembly when the hydraulic tensioning assembly fails due to leakage, thereby avoiding damage to the plate conveying assembly; when the hydraulic tensioning assembly or the automatic overflow mechanism is independently repaired or debugged, the retaining nut is locked, and the drum can be kept in tension state, thereby improving the convenience of debugging and maintenance.

[0025] (6) The main bearing and the sliding block can adopt a low-pressure oil supply self-lubricating structure, which slowly but continuously supplements the lubricating oil during operation, thereby omitting the step of shutdown maintenance.

[0026] (7) The area of the synchronous piston is much larger than the area of the piston blind pipe, so the hydraulic tensioning assembly can apply tensioning force far exceeding the tensioning force provided by the one-way pressure maintaining valve to the plate conveying assembly. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a perspective view of a self-lubricating hydraulic tensioning device of a plate feeder proposed by the present application; Figure 2 It is a front view of a self-lubricating hydraulic tensioning device of a plate feeder proposed by the present application; Figure 3 It is a left view of a self-lubricating hydraulic tensioning device of a plate feeder proposed by the present application; Figure 4 It is a top view of a self-lubricating hydraulic tensioning device of a plate feeder proposed by the present application; Figure 5 It is Figure 2 It is a sectional view along the cutting line A-A; Figure 6 It is Figure 3 It is a sectional view along the cutting line B-B; Figure 7 It isFigure 2 A cross-sectional view along the cutting line CC; Figure 8 for Figure 7 A partial enlarged view of point Ⅰ in the middle; Figure 9 for Figure 8 A partial enlarged view of the middle II; Figure 10 It is a schematic diagram of the hydraulic transmission of the automatic overflow mechanism and the hydraulic tensioning assembly.

[0028] Among them, 1. Automatic overflow mechanism, 2. Synchronous tensioning and correcting mechanism, 3. Frame assembly, 4. Plate conveying assembly, 11. Pressure stabilizing assembly, 12. Pressure relief assembly, 21. Hydraulic tensioning assembly, 22. Sliding assembly, 23. Mechanical holding assembly, 31. Main frame, 32. Cylinder support frame, 33. Mounting plate, 41. Roller, 42. Conveying device, 43. Main bearing, 111. T-shaped pipe, 112. One-way pressure holding valve, 113. Piston blind pipe, 114. Pressure stabilizing valve Plug, 115, pressure-stabilizing spring, 121, pressure-relief piston, 122, pressure-relief spring, 123, pressure-relief push rod, 124, pressure-relief pipe, 211, hydraulic cylinder, 212, synchronous cylinder, 213, hydraulic rod, 221, bearing seat, 222, slider, 223, guide frame, 231, retaining screw, 232, retaining nut, 1141, first side window, 1211, second side window, 2131, pulling piston, 2132, synchronous piston, 2231, guide rail.

[0029] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0032] like Figures 1-9As shown, the present application provides a self-lubricating hydraulic tensioning device of a plate feeder, which comprises an automatic overflow mechanism 1, a synchronous tensioning and deviation rectifying mechanism 2, a rack assembly 3 and a plate conveying assembly 4, the automatic overflow mechanism 1 is arranged on the rack assembly 3, the synchronous tensioning and deviation rectifying mechanism 2 is symmetrically arranged on the rack assembly 3, and the plate conveying assembly 4 is rotatably arranged in the synchronous tensioning and deviation rectifying mechanism 2. The automatic overflow mechanism 1 comprises a pressure stabilizing assembly 11 and a pressure relief assembly 12, the pressure relief assembly 12 is arranged in the pressure stabilizing assembly 11, the synchronous tensioning and deviation rectifying mechanism 2 comprises a hydraulic tensioning assembly 21, a sliding assembly 22 and a mechanical retaining assembly 23, the hydraulic tensioning assembly 21 is arranged on the rack assembly 3, the sliding assembly 22 is arranged on the rack assembly 3, and the mechanical retaining assembly 23 is arranged on the sliding assembly 22.

[0033] The automatic overflow mechanism 1 can maintain the pressure of the hydraulic tensioning assembly 21 stable through automatic liquid inlet and outlet control during the expansion and contraction of the hydraulic tensioning assembly 21, and thus the tensioning force of the plate conveying assembly 4 is stable.

[0034] The pressure stabilizing assembly 11 comprises a T-shaped pipe 111, a one-way pressure holding valve 112, a piston blind pipe 113, a pressure stabilizing piston 114 and a pressure stabilizing spring 115, the T-shaped pipe 111 is arranged on the rack assembly 3, the one-way pressure holding valve 112 is arranged at the end of the T-shaped pipe 111, the piston blind pipe 113 is clamped and slidably arranged in the T-shaped pipe 111, the pressure stabilizing piston 114 is clamped and slidably arranged in the piston blind pipe 113, the pressure stabilizing piston 114 is provided with a first side window 1141, and the pressure stabilizing spring 115 is arranged between the piston blind pipe 113 and the pressure stabilizing piston 114.

[0035] The one-way pressure holding valve 112 can maintain the pressure in the T-shaped pipe 111 stable, so as to automatically supplement oil when the pressure in the T-shaped pipe 111 is reduced, thereby maintaining the relative stability of the compression amount of the pressure stabilizing spring 115.

[0036] The pressure relief assembly 12 comprises a pressure relief piston 121, a pressure relief spring 122, a pressure relief jacking rod 123 and a pressure relief pipe 124, the pressure relief piston 121 is slidably arranged in the through hole of the pressure stabilizing piston 114, the pressure relief piston 121 is provided with a second side window 1211 corresponding to the first side window 1141, one end of the pressure relief pipe 124 is arranged in the through hole of the pressure stabilizing piston 114, the pressure relief spring 122 is arranged between the pressure relief piston 121 and the pressure relief pipe 124, the other end of the pressure relief pipe 124 extends to the outside of the T-shaped pipe 111, and the pressure relief jacking rod 123 is fixedly connected to the inner side of the piston blind pipe 113.

[0037] When the internal pressure of the T-shaped pipe 111 is too large, the first side window 1141 and the second side window 1211 can be converted from non-coincidence to coincidence by pushing the pressure relief piston 121 by the pressure relief top rod 123, so as to allow the internal oil of the T-shaped pipe 111 to be discharged, thereby maintaining the relative stability of the compression amount of the pressure stabilizing spring 115.

[0038] The hydraulic tensioning assembly 21 comprises a hydraulic cylinder body 211, a synchronous cylinder body 212, and a hydraulic rod 213. The hydraulic cylinder body 211 and the synchronous cylinder body 212 are fixedly connected and coaxially arranged. The hydraulic rod 213 is slidingly arranged at the center position of the hydraulic cylinder body 211 and the synchronous cylinder body 212. The hydraulic rod 213 is provided with a tensioning piston 2131 and a synchronous piston 2132. The tensioning piston 2131 is slidingly arranged in the hydraulic cylinder body 211. The synchronous piston 2132 is slidingly arranged in the synchronous cylinder body 212.

[0039] The front and rear cylinders of the two synchronous cylinder bodies 212 cross through each other. The synchronous sliding of the two hydraulic rods 213 can be realized by the synchronous piston 2132. Thus, when the plate conveying assembly 4 is unevenly stressed, the synchronism of the two hydraulic tensioning assemblies 21 on both sides can be automatically ensured, and the problem of the deflection of the roller 41 can be avoided.

[0040] The area of the synchronous piston 2132 is much larger than the area of the piston blind pipe 113. Therefore, the hydraulic tensioning assembly 21 can apply a tensioning force far exceeding the tensioning force provided by the one-way pressure maintaining valve 112 to the plate conveying assembly 4.

[0041] The sliding assembly 22 comprises a bearing seat 221, a sliding block 222, and a guide frame 223. The guide frame 223 is arranged on the rack assembly 3. The guide frame 223 is provided with a guide rail 2231. The sliding block 222 is slidingly arranged on the guide rail 2231. The sliding block 222 is fixedly connected to the two sides of the bearing seat 221.

[0042] The mechanical retaining assembly 23 comprises a retaining screw 231 and a retaining nut 232. The retaining screw 231 and the hydraulic rod 213 are respectively fixedly connected to the two sides of the bearing seat 221. The retaining nut 232 is threadedly connected with the retaining screw 231.

[0043] The retaining nut 232 is away from the guide frame 223 during normal operation. When the hydraulic tensioning assembly 21 fails due to leakage, etc., the plate conveying assembly 4 can be rigidly limited, so as to avoid damage to the plate conveying assembly 4. When the hydraulic tensioning assembly 21 or the automatic overflow mechanism 1 is independently maintained or debugged, the retaining nut 232 is locked, so as to retain the tensioning state of the roller 41, thereby improving the convenience of debugging and maintenance.

[0044] The frame assembly 3 includes a main frame 31, a cylinder support frame 32 and a mounting plate 33. The cylinder support frame 32 and the guide frame 223 are arranged on the main frame 31, the mounting plate 33 is arranged between the two cylinder support frames 32, and the T-shaped pipe 111 and the one-way pressure-holding valve 112 are arranged on the mounting plate 33.

[0045] The plate conveying assembly 4 includes a roller 41 , a conveying device 42 and a main bearing 43 . The main bearing 43 is disposed on the end shaft of the roller 41 . The main bearing 43 is disposed in the bearing seat 221 . The conveying device 42 and the roller 41 are in rolling contact.

[0046] like Figure 10 As shown, the front and rear cylinders of the two synchronous cylinder bodies 212 are cross-connected, which can achieve the synchronous extension and retraction of the two hydraulic rods 213; The T-shaped tube 111 is connected to the hydraulic cylinder body 211. Due to the large difference in area between the piston blind tube 113 and the synchronous piston 2132, the synchronous piston 2132 can apply a large thrust to the bearing seat 221 through the hydraulic rod 213. The pressure relief pipe 124 is connected to the liquid reservoir, and the one-way pressure-holding valve 112 is connected to the liquid reservoir and the pump. When the oil pressure in the T-shaped tube 111 is lower than the set value of the one-way pressure-holding valve 112, the liquid in the liquid reservoir enters the T-shaped tube 111 through the pump and the one-way pressure-holding valve 112. When the oil pressure in the T-shaped tube 111 is not lower than the set value of the one-way pressure-holding valve 112, the one-way pressure-holding valve 112 closes. When the hydraulic rod 213 is extended, the piston blind tube 113 slides upward, and the liquid in the liquid reservoir enters the T-shaped tube 111 through the pump and the one-way pressure-holding valve 112; when the hydraulic rod 213 is retracted, the piston blind tube 113 slides downward, and at this time the first side window 1141 and the second side window 1211 change from non-overlapping to overlapping, thereby allowing the oil inside the T-shaped tube 111 near the one-way pressure-holding valve 112 to be discharged through the pressure relief pipe 124, thereby maintaining the relative stability of the compression amount of the pressure-stabilizing spring 115.

[0047] In specific use, the conveying device 42 can be in the form of a chain or a conveyor belt, and both surfaces can be provided with a partition plate. Regardless of whether it is a chain or a conveyor belt, it will become loose due to wear, stretching, deformation, etc. after long-term use, thereby causing a decrease in tension. When large pieces of material fall unevenly, or when the transmission mechanism is stuck or stalled, it is easy to cause the tension of the conveying device 42 to increase suddenly.

[0048] Since the hydraulic pressure in the pressure stabilizing assembly 11 is stable, the liquid in the hydraulic rod 213 always applies a stable thrust to the synchronous piston 2132. Under the action of this thrust, if the tensioning force of the conveying device 42 increases or decreases, the tensioning force of the conveying device 42 can be kept stable through the sliding of the bearing seat 221.

[0049] When the tension of the conveying device 42 decreases, the oil pressure in the hydraulic cylinder body 211 and the T-shaped pipe 111 decreases, and when the oil pressure in the T-shaped pipe 111 is less than the set pressure of the one-way pressure holding valve 112, the external oil enters the T-shaped pipe 111 through the one-way pressure holding valve 112 until the pressure in the T-shaped pipe 111 recovers to the set pressure of the one-way pressure holding valve 112; During this process, the hydraulic rod 213 extends and pushes the bearing seat 221 to slide, thereby maintaining the tension of the conveying device 42.

[0050] When the tension of the conveying device 42 increases, the oil pressure in the hydraulic cylinder body 211 and the T-shaped pipe 111 increases, and since the one-way pressure holding valve 112 has the characteristic of one-way flow, the pressure stabilizing piston 114 slides towards the inside of the piston blind pipe 113 and continues to compress the pressure stabilizing spring 115, and when the hydraulic pressure exceeds the set safety threshold, the pressure relief top rod 123 contacts and pushes the pressure relief piston 121, causing the first side window 1141 and the second side window 1211 to change from non-coincidence to coincidence, thereby allowing the oil inside the T-shaped pipe 111 near the side of the one-way pressure holding valve 112 to be discharged through the pressure relief pipe 124, thereby maintaining the relative stability of the compression amount of the pressure stabilizing spring 115; During this process, the hydraulic rod 213 retracts under the push of the bearing seat 221, thereby maintaining the stability of the tension of the conveying device 42.

[0051] When the impact force ends, the tension of the conveying device 42 decreases, and the device also recovers the tension according to the above steps.

[0052] Since the impact force cannot fall exactly on the center line of the conveying device 42, the tension changes on both sides are not equal, so the hydraulic rod 213 is difficult to extend and retract synchronously, thereby easily causing the plate conveying assembly 4 to deflect; The front and rear cylinders of the two synchronous cylinder bodies 212 intersect and pass through each other, and when one side of the hydraulic rod 213 retracts, the oil in the rear cylinder of the synchronous cylinder body 212 on that side is squeezed into the front cylinder of the synchronous cylinder body 212 on the other side, and at the same time, negative pressure is generated in the front cylinder of the synchronous cylinder body 212 on that side, which sucks the oil in the rear cylinder of the synchronous cylinder body 212 on the other side into itself. The extension process of the hydraulic rod 213 is opposite to the above, which can make the extension and retraction movements of the hydraulic rods 213 on both sides synchronous; The synchronous piston 2132 realizes the synchronous sliding of the two hydraulic rods 213, thereby automatically ensuring the synchronization of the hydraulic tensioning assemblies 21 on both sides when the plate conveying assembly 4 is subjected to uneven force, avoiding the problem of deflection of the drum 41.

[0053] The retaining nut 232 is away from the guide frame 223 during normal operation, and can rigidly limit the plate conveying assembly 4 when the hydraulic tensioning assembly 21 fails due to leakage, so as to avoid damage to the plate conveying assembly 4; when the hydraulic tensioning assembly 21 or the automatic overflow mechanism 1 is independently maintained or debugged, the retaining nut 232 is locked, and the tensioning state of the roller 41 can be maintained, so as to improve the convenience of debugging and maintenance.

[0054] As another new embodiment of the application, the bearing and the sliding block in the scheme can be self-lubricated by continuous oil supply.

[0055] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article or device.

[0056] The above describes the application and its embodiments, which are not limited, and the embodiments shown in the drawings are only one of the embodiments of the application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the application, without creative design, similar structure and embodiments of the technical scheme can be designed, which should belong to the protection scope of the application.

Claims

1. A self-lubricating hydraulic tensioning device for a plate feeder, characterized by: The application relates to a plate conveying device, which comprises an automatic overflow mechanism (1), a synchronous tensioning deviation rectifying mechanism (2), a rack assembly (3) and a plate conveying assembly (4), wherein the automatic overflow mechanism (1) is arranged on the rack assembly (3), the synchronous tensioning deviation rectifying mechanism (2) is symmetrically arranged on the rack assembly (3), and the plate conveying assembly (4) is rotatably arranged in the synchronous tensioning deviation rectifying mechanism (2). The automatic overflow mechanism (1) comprises a pressure stabilizing assembly (11) and a pressure relief assembly (12), the pressure relief assembly (12) is arranged in the pressure stabilizing assembly (11), the synchronous tensioning deviation rectifying mechanism (2) comprises a hydraulic tensioning assembly (21), a sliding assembly (22) and a mechanical retaining assembly (23), the hydraulic tensioning assembly (21) is arranged on the rack assembly (3), the sliding assembly (22) is arranged on the rack assembly (3), and the mechanical retaining assembly (23) is arranged on the sliding assembly (22).

2. A self-lubricating hydraulic tensioning device for a plate feeder according to claim 1, characterized in that: The pressure stabilizing assembly (11) comprises a T-shaped pipe (111), a one-way pressure holding valve (112), a piston blind pipe (113), a pressure stabilizing piston (114) and a pressure stabilizing spring (115), the T-shaped pipe (111) is arranged on the rack assembly (3), the one-way pressure holding valve (112) is arranged at the end of the T-shaped pipe (111), the piston blind pipe (113) is clamped and slidably arranged in the T-shaped pipe (111), the pressure stabilizing piston (114) is clamped and slidably arranged in the piston blind pipe (113), the pressure stabilizing piston (114) is provided with a first side window (1141), and the pressure stabilizing spring (115) is arranged between the piston blind pipe (113) and the pressure stabilizing piston (114).

3. A self-lubricating hydraulic tensioning device for a plate feeder according to claim 2, characterized in that: The pressure relief assembly (12) comprises a pressure relief piston (121), a pressure relief spring (122), a pressure relief top rod (123) and a pressure relief pipe (124), the pressure relief piston (121) is slidably arranged in the through hole of the pressure stabilizing piston (114), the pressure relief piston (121) is provided with a second side window (1211) corresponding to the first side window (1141), one end of the pressure relief pipe (124) is arranged in the through hole of the pressure stabilizing piston (114), the pressure relief spring (122) is arranged between the pressure relief piston (121) and the pressure relief pipe (124), the other end of the pressure relief pipe (124) extends to the outside of the T-shaped pipe (111), and the pressure relief top rod (123) is fixedly connected to the inner side of the piston blind pipe (113).

4. A self-lubricating hydraulic tensioning device for a plate feeder according to claim 3, characterized in that: The hydraulic tensioning assembly (21) comprises a hydraulic cylinder body (211), a synchronous cylinder body (212) and a hydraulic rod (213), the hydraulic cylinder body (211) and the synchronous cylinder body (212) are fixedly connected and coaxially arranged, the hydraulic rod (213) is clamped and slidably arranged at the center position of the hydraulic cylinder body (211) and the synchronous cylinder body (212), the hydraulic rod (213) is provided with a tensioning piston (2131) and a synchronous piston (2132), the tensioning piston (2131) is clamped and slidably arranged in the hydraulic cylinder body (211), and the synchronous piston (2132) is clamped and slidably arranged in the synchronous cylinder body (212).

5. A self-lubricating hydraulic tensioning device for a plate feeder according to claim 4, characterized in that: The sliding assembly (22) includes a bearing seat (221), a slider (222) and a guide frame (223); the guide frame (223) is arranged on the frame assembly (3); a guide rail (2231) is provided on the guide frame (223); the slider (222) is engaged and slidably arranged on the guide rail (2231); and the slider (222) is fixed to both sides of the bearing seat (221).

6. A self-lubricating hydraulic tensioning device for a plate feeder according to claim 5, characterized in that: The mechanical retaining assembly (23) comprises a retaining screw (231) and a retaining nut (232); the retaining screw (231) and the hydraulic rod (213) are respectively fixed to two sides of the bearing seat (221); and the retaining nut (232) and the retaining screw (231) are threadedly connected.

7. A self-lubricating hydraulic tensioning device for a plate feeder according to claim 6, characterized in that: The frame assembly (3) comprises a main frame (31), a cylinder support frame (32) and a mounting plate (33); the cylinder support frame (32) and the guide frame (223) are arranged on the main frame (31); the mounting plate (33) is arranged between the two cylinder support frames (32); and the T-shaped pipe (111) and the one-way pressure-holding valve (112) are arranged on the mounting plate (33).

8. A self-lubricating hydraulic tensioning device for a plate feeder according to claim 7, characterized in that: The plate-type conveying assembly (4) comprises a roller (41), a conveying device (42) and a main bearing (43), wherein the main bearing (43) is arranged on an end shaft of the roller (41), the main bearing (43) is arranged in a bearing seat (221), and the conveying device (42) and the roller (41) are in rolling contact.

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