Self-lubricating hydraulic tensioning device for a plate feeder

Abstract

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, 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 present application creatively proposes a pressure stabilizing assembly and a pressure releasing assembly, through a one-way pressure holding valve which can freely set pressure, the pressure of the hydraulic tensioning assembly can be always maintained stable through automatic liquid inlet and outlet control in the process of expansion and contraction of the hydraulic tensioning assembly, and the tensioning force of the plate conveying assembly is also ensured 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;

[0003] The main disadvantage of the gravity hammer type is that the space occupied is large 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.

[0004] 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;

[0005] In addition, the current hydraulic cylinders are mainly controlled to extend and retract, and need to be combined with the feedback data of the sensor, so that the structure is generally complex and the cost is generally high. SUMMARY

[0006] In view of the above situation, in order to overcome the defects of the prior art, 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;

[0007] 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.

[0008] 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;

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] The front and rear cylinders of the two synchronous cylinders cross through each other, and the synchronous sliding of the two hydraulic rods can be realized through 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.

[0017] The area of the synchronous piston is much larger than that of the piston blind pipe, so the hydraulic tensioning assembly can apply a tensioning force far exceeding that provided by the one-way holding valve to the plate conveying assembly.

[0018] 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.

[0019] 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.

[0020] 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 and the like, 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] The present application has the following beneficial effects by adopting the above structure:

[0025] (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 also stable.

[0026] (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.

[0027] (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.

[0028] (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.

[0029] (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 drum can be kept in tension state by locking the retaining nut, thereby improving the convenience of debugging and maintenance.

[0030] (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.

[0031] (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 tension to the plate conveying assembly far exceeding the tension provided by the one-way pressure maintaining valve. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A perspective view of a self-lubricating hydraulic tensioning device for a plate feeder is proposed in the present application;

[0033] Figure 2 A front view of a self-lubricating hydraulic tensioning device for a plate feeder is proposed in the present application;

[0034] Figure 3 A left view of a self-lubricating hydraulic tensioning device for a plate feeder is proposed in the present application;

[0035] Figure 4 A top view of a self-lubricating hydraulic tensioning device for a plate feeder is proposed in the present application;

[0036] Figure 5 A Figure 2 sectional view along the section line A-A;

[0037] Figure 6 Fig. 1 is a schematic diagram of the hydraulic transmission of the automatic overflow mechanism and the hydraulic tensioning assembly. Figure 3 Fig. 2 is a sectional view along the section line B-B in Fig. 1.

[0038] Figure 7 Fig. 3 is a sectional view along the section line C-C in Fig. 1. Figure 2 Fig. 4 is a sectional view along the section line D-D in Fig. 1.

[0039] Figure 8 Fig. 5 is an enlarged view of part I in Fig. 1. Figure 7 Fig. 6 is an enlarged view of part II in Fig. 1.

[0040] Figure 9 Fig. 7 is an enlarged view of part III in Fig. 1. Figure 8 Fig. 8 is an enlarged view of part IV in Fig. 1.

[0041] Figure 10 Fig. 9 is a schematic diagram of the hydraulic transmission of the automatic overflow mechanism and the hydraulic tensioning assembly.

[0042] Fig. 1 is a schematic diagram of the hydraulic transmission of the automatic overflow mechanism and the hydraulic tensioning assembly. Wherein, 1 is the automatic overflow mechanism, 2 is the synchronous tensioning and deviation rectifying mechanism, 3 is the rack assembly, 4 is the plate type conveying assembly, 11 is the pressure stabilizing assembly, 12 is the pressure releasing assembly, 21 is the hydraulic tensioning assembly, 22 is the sliding assembly, 23 is the mechanical holding assembly, 31 is the main rack, 32 is the cylinder body support rack, 33 is the mounting plate, 41 is the roller, 42 is the conveying device, 43 is the main bearing, 111 is the T-shaped pipe, 112 is the one-way pressure holding valve, 113 is the piston blind pipe, 114 is the pressure stabilizing piston, 115 is the pressure stabilizing spring, 121 is the pressure releasing piston, 122 is the pressure releasing spring, 123 is the pressure releasing top rod, 124 is the pressure releasing pipe, 211 is the hydraulic cylinder body, 212 is the synchronous cylinder body, 213 is the hydraulic rod, 221 is the bearing seat, 222 is the sliding block, 223 is the guide frame, 231 is the holding screw rod, 232 is the holding nut, 1141 is the first side window, 1211 is the second side window, 2131 is the tensioning piston, 2132 is the synchronous piston, and 2231 is the guide rail.

[0043] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] As shown in Figures 1-9 The present application proposes 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.

[0047] The automatic overflow mechanism 1 comprises a pressure stabilizing assembly 11 and a pressure relief assembly 12, and 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.

[0048] 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 at the same time, the tensioning force of the plate conveying assembly 4 is also ensured to be stable.

[0049] 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.

[0050] 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.

[0051] The pressure relief assembly 12 comprises a pressure relief piston 121, a pressure relief spring 122, a pressure relief rod 123 and a pressure relief pipe 124. The pressure relief piston 121 is slidingly 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. The pressure relief rod 123 is fixedly connected to the inner side of the piston blind pipe 113.

[0052] 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 changed from non-coincidence to coincidence by pushing the pressure relief piston 121 through the pressure relief rod 123, thereby allowing the internal oil of the T-shaped pipe 111 to be discharged, and further maintaining the relative stability of the compression amount of the pressure stabilizing spring 115.

[0053] The hydraulic tensioning assembly 21 comprises a hydraulic cylinder body 211, a synchronization cylinder body 212 and a hydraulic rod 213. The hydraulic cylinder body 211 and the synchronization cylinder body 212 are fixedly connected and coaxially arranged. The hydraulic rod 213 is slidingly arranged in the center position of the hydraulic cylinder body 211 and the synchronization cylinder body 212. The hydraulic rod 213 is provided with a tensioning piston 2131 and a synchronization piston 2132. The tensioning piston 2131 is slidingly arranged in the hydraulic cylinder body 211. The synchronization piston 2132 is slidingly arranged in the synchronization cylinder body 212.

[0054] The front and rear cylinders of the two synchronization cylinder bodies 212 cross through each other, and the synchronization of the two hydraulic rods 213 can be realized by the synchronization piston 2132, thereby automatically ensuring the synchronization of the hydraulic tensioning assemblies 21 on both sides when the plate conveying assembly 4 is unevenly stressed, and avoiding the problem of deflection of the roller 41.

[0055] The area of the synchronization piston 2132 is much larger than the area of the piston blind pipe 113, so 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.

[0056] 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.

[0057] The mechanical holding assembly 23 comprises a holding screw 231 and a holding nut 232. The holding screw 231 and the hydraulic rod 213 are respectively fixedly connected to the two sides of the bearing seat 221. The holding nut 232 is threadedly connected with the holding screw 231.

[0058] 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, etc., 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 to maintain the tensioning state of the roller 41, thereby improving the convenience of debugging and maintenance.

[0059] The rack assembly 3 comprises a main rack 31, cylinder support frames 32 and mounting plates 33, the cylinder support frames 32 and the guide frame 223 are arranged on the main rack 31, and the mounting plates 33 are arranged between the two cylinder support frames 32, and the T-shaped pipe 111 and the one-way pressure retaining valve 112 are arranged on the mounting plates 33.

[0060] The plate conveying assembly 4 comprises a roller 41, a conveying device 42 and a main bearing 43, the main bearing 43 is arranged on the end shaft of the roller 41, the main bearing 43 is arranged in the bearing seat 221, and the conveying device 42 and the roller 41 are in rolling contact.

[0061] As shown in Figure 10 The front and rear cylinders of the two synchronous cylinders 212 cross through each other, so that the two hydraulic rods 213 can be synchronously extended and retracted;

[0062] The T-shaped pipe 111 is in communication with the hydraulic cylinder 211, and since the area difference between the piston blind pipe 113 and the synchronous piston 2132 is large, 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 storage pool, and the one-way pressure retaining valve 112 is connected to the liquid storage pool and the pump, when the oil pressure in the T-shaped pipe 111 is lower than the set value of the one-way pressure retaining valve 112, the liquid in the liquid storage pool enters the T-shaped pipe 111 through the pump and the one-way pressure retaining valve 112, and when the oil pressure in the T-shaped pipe 111 is not lower than the set value of the one-way pressure retaining valve 112, the one-way pressure retaining valve 112 is closed;

[0063] When the hydraulic rod 213 is extended, the piston blind pipe 113 slides upward, and the liquid in the liquid storage pool enters the T-shaped pipe 111 through the pump and the one-way pressure retaining valve 112; when the hydraulic rod 213 is retracted, the piston blind pipe 113 slides downward, at this time, the first side window 1141 and the second side window 1211 change from non-coincidence to coincidence, so as to allow the oil inside the T-shaped pipe 111 close to the one-way pressure retaining 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.

[0064] In specific use, the conveying device 42 can be in the form of a chain or a conveying belt, and the surface can be provided with a partition plate, whether it is a chain or a conveying belt, long-term use will cause it to become loose due to wear, stretching, deformation, etc., thereby causing the tension to decrease;

[0065] When the large material unevenly falls, or the transmission mechanism is stuck, the tension of the conveying device 42 is also prone to sudden increase.

[0066] Because the hydraulic pressure in the pressure stabilizing assembly 11 is stable, the liquid in the hydraulic rod 213 always exerts a stable pushing force on the synchronous piston 2132. Under the action of this pushing force, if the tension of the conveying device 42 increases or decreases, the tension of the conveying device 42 can be kept stable through the sliding of the bearing seat 221.

[0067] 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. 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 will enter 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.

[0068] During this process, the hydraulic rod 213 will extend and push the bearing seat 221 to slide, thereby keeping the tension of the conveying device 42.

[0069] When the tension of the conveying device 42 increases, the oil pressure in the hydraulic cylinder body 211 and the T-shaped pipe 111 rises. Because the one-way pressure holding valve 112 has the characteristic of one-way flow, the pressure stabilizing piston 114 will slide towards the inside of the piston blind pipe 113 and continue to compress the pressure stabilizing spring 115. When the hydraulic pressure exceeds the set safety threshold, the pressure relief top rod 123 will contact and push the pressure relief piston 121, so that the first side window 1141 and the second side window 1211 change from non-coincidence to coincidence, thereby allowing the oil inside the T-shaped pipe 111 close to the side of the one-way pressure holding valve 112 to be discharged through the pressure relief pipe 124, and thereby maintaining the relative stability of the compression amount of the pressure stabilizing spring 115.

[0070] During this process, the hydraulic rod 213 will retract under the push of the bearing seat 221, thereby keeping the tension of the conveying device 42 stable.

[0071] When the impact force ends, the tension of the conveying device 42 decreases, and the device will also recover the tension according to the above steps.

[0072] Because 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.

[0073] The front and rear cylinders of the two synchronous cylinder bodies 212 cross through, when the hydraulic rod 213 on one side retracts, the oil in the rear cylinder of the synchronous cylinder body 212 on this side is extruded into the front cylinder of the synchronous cylinder body 212 on the other side, at the same time, negative pressure is generated in the front cylinder of the synchronous cylinder body 212 on this side, and the oil in the rear cylinder of the synchronous cylinder body 212 on the other side is sucked into itself, the extension process of the hydraulic rod 213 is opposite to the above, and the extension and retraction movements of the hydraulic rods 213 on both sides can be synchronized.

[0074] The synchronous sliding of the two hydraulic rods 213 is realized through the synchronous piston 2132, and then the synchronization of the hydraulic tensioning assemblies 21 on both sides is automatically ensured when the plate conveying assembly 4 is unevenly stressed, and the problem of the deflection of the roller 41 is avoided.

[0075] The retaining nut 232 is away from the guide frame 223 during normal work, can rigidly limit the plate conveying assembly 4 when the hydraulic tensioning assembly 21 fails due to leakage, and thus damage to the plate conveying assembly 4 is avoided; when the hydraulic tensioning assembly 21 or the automatic overflow mechanism 1 is independently maintained or debugged, the roller 41 can be kept in a tensioned state by locking the retaining nut 232, and thus the convenience of debugging and maintenance is improved.

[0076] As another new embodiment of the application, the bearing, sliding block and other parts in the scheme can be self-lubricated through continuous oil supply.

[0077] 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 processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices.

[0078] The above describes the application and its embodiments, which are not limited, and the drawings only show 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 solution 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 in that: It includes an automatic overflow mechanism (1), a synchronous tensioning and correction mechanism (2), a frame assembly (3), and a plate conveyor assembly (4). The automatic overflow mechanism (1) is mounted on the frame assembly (3), the synchronous tensioning and correction mechanism (2) is symmetrically mounted on the frame assembly (3), and the plate conveyor assembly (4) is rotatably mounted in the synchronous tensioning and correction mechanism (2). The automatic overflow mechanism (1) includes a pressure stabilizing component (11) and a pressure relief component (12). The pressure relief component (12) is located in the pressure stabilizing component (11). The synchronous tensioning and correction mechanism (2) includes a hydraulic tensioning component (21), a sliding component (22), and a mechanical holding component (23). The hydraulic tensioning component (21) is located on the frame assembly (3). The sliding component (22) is located on the frame assembly (3). The mechanical holding component (23) is located on the sliding component (22). The pressure stabilizing assembly (11) includes a T-tube (111), a one-way pressure holding valve (112), a piston blind tube (113), a pressure stabilizing piston (114), and a pressure stabilizing spring (115). The T-tube (111) is mounted on the frame assembly (3). The one-way pressure holding valve (112) is located at the end of the T-tube (111). The piston blind tube (113) is engaged and slidably mounted in the T-tube (111). The pressure stabilizing piston (114) is engaged and slidably mounted in the piston blind tube (113). The pressure stabilizing piston (114) is provided with a first side window (1141). The pressure stabilizing spring (115) is located between the piston blind tube (113) and the pressure stabilizing piston (114). The pressure relief assembly (12) includes a pressure relief piston (121), a pressure relief spring (122), a pressure relief push rod (123), and a pressure relief pipe (124). The pressure relief piston (121) is slidably disposed 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 disposed in the through hole of the pressure stabilizing piston (114). The pressure relief spring (122) is disposed 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). The pressure relief push rod (123) is fixed to the inside of the piston blind pipe (113). The hydraulic tensioning assembly (21) includes a hydraulic cylinder (211), a synchronous cylinder (212), and a hydraulic rod (213). A T-shaped tube (111) is connected to the hydraulic cylinder (211). The sliding assembly (22) includes a bearing seat (221), a slider (222), and a guide frame (223). The plate conveying assembly (4) includes a roller (41), a conveying device (42), and a main bearing (43). The main bearing (43) is located on the end shaft of the roller (41) and is located in the bearing seat (221). The hydraulic rod (213) is fixed to one side of the bearing housing (221).

2. The self-lubricating hydraulic tensioning device for a plate feeder according to claim 1, characterized in that: The hydraulic cylinder (211) and the synchronizing cylinder (212) are fixedly connected and coaxially arranged. The hydraulic rod (213) is engaged and slidably disposed at the center position of the hydraulic cylinder (211) and the synchronizing cylinder (212). The hydraulic rod (213) is provided with a pull piston (2131) and a synchronizing piston (2132). The pull piston (2131) is engaged and slidably disposed in the hydraulic cylinder (211), and the synchronizing piston (2132) is engaged and slidably disposed in the synchronizing cylinder (212).

3. The self-lubricating hydraulic tensioning device for a plate feeder according to claim 2, characterized in that: The guide frame (223) is mounted on the frame assembly (3), and the guide frame (223) is provided with a guide rail (2231). The slider (222) is engaged and slidably mounted on the guide rail (2231), and the slider (222) is fixed to both sides of the bearing seat (221).

4. The self-lubricating hydraulic tensioning device for a plate feeder according to claim 3, characterized in that: The mechanical retaining assembly (23) includes a retaining screw (231) and a retaining nut (232), the retaining screw (231) being fixed to the other side of the bearing housing (221), and the retaining nut (232) and the retaining screw (231) being threaded together.

5. The self-lubricating hydraulic tensioning device for a plate feeder according to claim 4, characterized in that: 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 mounted on the main frame (31). The mounting plate (33) is located between the two cylinder support frames (32). The T-tube (111) and the one-way pressure holding valve (112) are located on the mounting plate (33).

6. The self-lubricating hydraulic tensioning device for a plate feeder according to claim 5, characterized in that: The conveying device (42) and the roller (41) are in rolling contact.

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