A precision stamping and forming equipment for automated production of shielding covers

Abstract

The present invention relates to the technical field of stamping and forming of aviation metal shielding covers, and specifically to a precision stamping and forming device for automatically producing shielding covers. The present invention comprises a base, an L-shaped mounting frame is fixedly provided on one side of the top of the base, a support is fixedly provided on the inner side of the mounting frame, and an inclined rib plate is fixedly provided between the bottom of the support and the mounting frame, a lower mold assembly is provided at one end of the top of the support, an upper mold assembly is provided at a position corresponding to the lower mold assembly at the top of the inner side of the mounting frame, and a material preparation mechanism for supplying raw materials for shielding cover production is provided at one end of the top of the support away from the lower mold assembly; the material preparation mechanism is composed of a reeling assembly, a conveying assembly and a pressing and cutting assembly, and an anti-rewinding mechanism is provided between the reeling assembly and the conveying assembly. The present invention breaks through the traditional horizontal continuous mold structure design, has an ingenious structural design, can save the space occupied by the stamping and forming mold, and each action is progressive layer by layer, thereby improving the quality of stamping and forming.

Description

Technical Field

[0001] The invention relates to the technical field of stamping and forming of aviation metal shielding covers, in particular to a precision stamping and forming device for automatically producing shielding covers. Background Art

[0002] Stamping is a forming method that uses a press and a die to apply external force to plates, strips, tubes and profiles to cause plastic deformation or separation, thereby obtaining a workpiece (stamping part) of the desired shape and size. A mobile phone shielding cover is a device that uses a shielding body to surround the interference source of components, circuits, assemblies, cables or the entire system to prevent the interference electromagnetic field from spreading outward.

[0003] The prior art discloses a Chinese patent with publication number CN 219378593 U (IPC classification number B21D22 / 02): a shielding cover stamping device, and discloses a base, one side of the base is provided with a square groove, the upper surface of the base is fixedly connected to a lower die, the upper surface of the base is fixedly connected to a support plate, the upper surface of the support plate is fixedly connected to two hydraulic cylinders, the output end of the hydraulic cylinder is fixedly connected to an upper die, and the side of the base close to the square groove is provided with an adjustment structure, the adjustment structure includes a welding plate, the welding plate is fixedly connected to the base, the lower surface of the welding plate is fixedly connected to an electric push rod, the output end of the electric push rod is rotatably connected to a rotating rod, and one side of the inner wall of the base is fixedly connected to a slide rail. The existing stamping mold needs to be manually demoulded after stamping, and the manual demoulding is time-consuming and labor-intensive, resulting in low efficiency, because the finished product after stamping is tightly stuck with the mold box.

[0004] However, the prior art still has certain defects. For example, the technical solution with publication number CN 219378593 U requires manual material discharge during use, which affects the stamping efficiency. After stamping, the stamped finished product is tightly stuck to the mold box, which makes it easy to cause deformation during the process of ejecting the finished product, thereby affecting the quality of the finished product. Summary of the invention

[0005] The object of the present invention is to provide a precision stamping and forming device for automatically producing shielding covers, so as to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A precision stamping and forming device for automatically producing shielding covers comprises a base, a mounting frame of an L-shaped structure is fixedly arranged on one side of the top of the base, a support platform is fixedly arranged on the inner side of the mounting frame, and a rib plate arranged in an inclined manner is fixedly arranged between the bottom of the support platform and the mounting frame, a lower die assembly is arranged on one end of the top of the support platform, and an upper die assembly is arranged at a position corresponding to the lower die assembly on the inner top of the mounting frame;

[0008] A material preparation mechanism for supplying raw materials for shielding cover production is arranged at one end of the top of the support away from the lower mold assembly. The material preparation mechanism consists of an unwinding assembly, a conveying assembly and a pressing and cutting assembly. An anti-rewinding mechanism is arranged between the unwinding assembly and the conveying assembly.

[0009] In a preferred embodiment, the upper mold assembly includes an upper mold base arranged at the top inner side of the mounting frame, a lifting groove is vertically penetrated through the center position of the upper mold base, a T-shaped die head is movably sleeved inside the lifting groove, a cutter 1 is fixedly provided on the bottom end surface of the upper mold base, a lifting plate is provided on the top of the die head, a plurality of drilling columns are fixedly provided on the bottom of the lifting plate, a through hole is vertically penetrated through the top of the die head corresponding to each drilling column, and the bottom end of the drilling column is movably inserted into the corresponding through hole, and two cylinders 1, two cylinders 2 and two cylinders 3 are respectively fixedly installed between the top ends of the upper mold base, the die head and the lifting plate and the top of the inner side of the mounting frame.

[0010] In a preferred embodiment, the lower mold assembly includes a lower mold base fixed on the top of the support platform, a cavity is arranged on the top of the lower mold base, a mold cavity is fixedly arranged at the position of the bottom of the inner cavity of the cavity corresponding to the mold head, and a thin film pressure sensor 2 is installed at the position of the bottom of the inner cavity of the cavity located on the inner side of the mold cavity, a lifting platform is arranged on the top of the lower mold base, telescopic columns are installed between the two ends of the bottom of the lifting platform and the bottom of the inner cavity of the cavity, two springs are movably sleeved on the outside of the two telescopic columns, sink grooves are opened on the top of both sides of the inner cavity of the cavity, a thin film pressure sensor 1 is installed on the bottom end surface of the inner cavity of the sink groove, and a cutting groove 1 is opened at the position of the top of the lifting platform corresponding to the cutting knife 1.

[0011] In a preferred embodiment, the upper die assembly and the lower die assembly are both provided with a stamping oil supply part, the stamping oil supply part of the upper die assembly comprises a groove opened at the center position of the bottom of the die head and a supply pipe installed at the top of the die head and connected with the groove, the top end of the supply pipe movably penetrates the lifting plate, the inner cavity of the groove is movably sleeved with a cotton block and a movable block from top to bottom, a T-shaped column 1 is fixedly provided at the center position of the top of the movable block, and the top end of the T-shaped column 1 movably penetrates the die head and the lifting plate in turn, the outer peripheral surface of one end of the T-shaped column 1 extending to the top of the lifting plate is movably sleeved with a spring 1, the two ends of the spring 1 are respectively fixedly connected to the lifting plate and the T-shaped column 1, and a plurality of through holes are vertically penetrated through the top of the movable block;

[0012] The stamping oil supply part of the lower die assembly includes cavities opened at both ends of the lifting platform and a square ring cavity on the lifting platform located between the two cavities, and an isolation part is formed between the two ends of the square ring cavity and the corresponding cavities, and a cotton ring is fixedly embedded at a position corresponding to the bottom end of the square ring cavity on the inner circumference of the lifting platform, and liquid bags are fixedly provided inside the two cavities, and movable columns are fixedly connected to the opposite ends of the two liquid bags, and the two movable columns move in turn at the opposite ends to penetrate the isolation part and the lifting platform at the corresponding position, and a spring three is movablely provided at the outer circumference of the movable column at a position between the corresponding isolation part and the liquid bag, and the bottom end of the liquid bag is connected with a liquid inlet pipe and a liquid outlet pipe, the other end of the liquid outlet pipe is connected with the square ring cavity, and the other end of the liquid inlet pipe passes through the lifting platform and the lower die seat in turn.

[0013] In a preferred embodiment, the unwinding assembly includes a slot opened at the end of the support platform, and installation slots are opened on both sides of the inner cavity of the slot. The two installation slots are composed of a connected straight slot and a circular slot, and a metal strip roll is installed between the circular slots on the two installation slots.

[0014] In a preferred embodiment, the conveying assembly includes two brackets fixed on the top of the support platform, and two rollers driven by a driving motor are rotatably installed between the two brackets. The outer circumferences of the two rollers are fixedly provided with arc-shaped convex edges.

[0015] In a preferred embodiment, the pressure-cutting assembly includes a pressure seat fixedly mounted on the top of the support platform, a pressure seat is arranged on the top of the pressure seat, two T-shaped columns are fixedly arranged at the four corners of the top of the pressure seat, and the tops of the four T-shaped columns are movably penetrated through the mounting frame, and the outer circumference of one end of each T-shaped column extending to the top of the mounting frame is movably sleeved with a spring four, the pressure seat and the pressure seat are respectively fixedly provided with an extension table and two cutters at one end close to the conveying assembly, and two cutting grooves are opened at the position corresponding to the two cutters on the top of the extension table, heating plates are fixedly embedded on the opposite sides of the pressure seat and the pressure seat, two vertical plates are fixedly provided on the inner top of the mounting frame, and a swing arm is rotatably installed between the opposite sides of the two vertical plates through a rotating rod.

[0016] In a preferred embodiment, the anti-rewinding mechanism includes a rotating shaft rotatably installed between opposite sides of two brackets, one end of the rotating shaft located at the upper position extends to the outside of the bracket at the location and is fixedly sleeved with a ratchet, the outer circumferences of the two rotating shafts located between the two brackets are fixedly sleeved with rubber rollers, and a baffle and a round rod are fixedly provided at the top end of the outer side of the bracket near the ratchet, and a ratchet is rotatably installed on the outer circumference of the round rod through a bearing.

[0017] In a preferred embodiment, a collecting mechanism is provided at a position on the top of the base corresponding to the lower mold assembly, and the collecting mechanism includes an outer frame fixed to the top of the base, an inner frame with a mesh structure movably sleeved inside the outer frame, and slots are provided at both ends of the top of the outer frame, and convex plates are fixed at positions on the tops of both sides of the inner frame corresponding to the slots, and the convex plates are embedded in the slots at the corresponding positions.

[0018] In a preferred embodiment, a material organization mechanism and a conveyor belt are also installed at one end of the top of the base away from the material preparation mechanism, and the material organization mechanism includes an L-shaped support fixedly installed on the top of the base, a bracket is fixedly provided at the end of the horizontal section inside the L-shaped support, and a servo motor is fixedly installed at the end of the vertical section inside the L-shaped support, an outer ring is fixedly connected to the top of the bracket, two conveying grooves are connected on the outer circumferential surface of the outer ring, an inner ring is provided on the movable sleeve inside the outer ring, a straight plate is fixedly connected to the end of the output shaft of the servo motor, and a straight rod is fixedly connected between the end of the straight plate away from the servo motor and the inner ring;

[0019] A circular plate is provided on the movable sleeve inside the inner ring, and a disc is fixedly provided on the side of the circular plate close to the straight plate, a connecting groove is provided on the side of the circular plate away from the disc, a sealing plate is provided on the side of the outer ring away from the straight plate, the sealing plate is fixed to the outer ring and the circular plate by bolts, the ends of the two conveying channels are respectively fixedly connected with a feed hopper and a discharge arc plate, and the discharge arc plate and the conveyor belt have a smooth transition, four annular and evenly distributed running grooves are provided on the outer circumferential surface of the end of the inner ring away from the straight plate, and a protrusion is fixedly provided on one side of the inner cavity of each running groove.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention breaks through the traditional horizontal continuous die structure design. The structure design is ingenious, which can save the space occupied by the stamping die, and each action is progressive, which improves the quality of stamping. At the same time, in the process of stamping the metal strip through the clamping action of the upper die assembly and the lower die assembly, the stamping oil supply part is used to apply stamping oil to the forming surface of the metal strip, so as to improve the stability of the stamping of the metal strip and the protection of the die;

[0022] 2. The present invention uses the arc-shaped convex edge that rotates synchronously with the roller to alternately and intermittently transport the passively unwound metal strip to the pressing and cutting station, and uses the swinging arm to press the press seat downward, so that the cutter at the end of the downward pressing press seat cuts the metal strip to a fixed length. At the same time, the press seat and the pressure seat are used to heat and flatten the cut metal strip;

[0023] 3. The present invention provides an anti-rewinding mechanism between the unwinding assembly and the conveying assembly, and can use a baffle to prevent the pawl from swinging in the opposite direction, thereby preventing the rubber roller from rotating, thereby preventing the metal strip connected to the metal strip coil from rewinding after being cut off;

[0024] 4. After the present invention uses the metal strip to be stamped and formed to push the finished shielding cover away from the stamping and forming station, the finished shielding cover leaving the stamping and forming station can be corrected and adjusted by the material sorting mechanism, so that the finished shielding cover discharged along the discharge arc plate can be transported to the conveyor belt in the same direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0027] Figure 2 is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0028] Figure 3 It is a schematic diagram of the overall top view of the structure of the present invention;

[0029] Figure 4 The present invention Figure 3 Schematic diagram of the AA section structure;

[0030] Figure 5 The present invention Figure 4 Schematic diagram of the local structure;

[0031] Figure 6 It is a front view structural schematic diagram of the lower mold assembly of the present invention;

[0032] Figure 7 The present invention Figure 6 Schematic diagram of the cross-section structure along the BB axis;

[0033] Figure 8 The present invention Figure 4 A schematic diagram of the structure enlargement of part A;

[0034] Fig. 9 It is a schematic diagram of the support structure of the present invention;

[0035] Fig.10 The present invention Figure 4 A schematic diagram of the structure of part B in the middle is enlarged;

[0036] Fig.11 It is a schematic diagram of the structure of the collecting mechanism of the present invention;

[0037] Fig.12 The present invention Figure 2 The enlarged schematic diagram of the structure of part C in the middle;

[0038] Fig.13 It is a schematic diagram of the decomposition mechanism of the whole material mechanism of the present invention;

[0039] Fig.14 This is a schematic diagram of the overall structure of the present invention from a third viewing angle

[0040] Fig.15 It is a schematic diagram of the bottom view of the shielding cover produced by the present invention;

[0041] Fig.16 It is a schematic diagram of the top view of the shielding cover produced by the present invention.

[0042] The reference numerals in the figure are as follows: 1, base; 2, mounting frame; 3, upper die assembly; 31, upper die seat; 32, lifting channel; 33, die head; 34, movable block; 35, cotton block; 36, T-shaped column 1; 37, spring 1; 38, lifting plate; 39, drilling column; 310, cutter 1; 311, cylinder 1; 312, cylinder 2; 313, cylinder 3; 314, supply pipe; 4, lower die assembly; 41, lower die seat; 42, cavity ; 43, lifting platform; 44, telescopic column; 45, spring 2; 46, sink; 47, thin film pressure sensor 1; 48, cavity; 49, square ring cavity; 410, cotton ring; 411, liquid capsule; 412, movable column; 413, spring 3; 414, liquid inlet pipe; 415, liquid outlet pipe; 416, thin film pressure sensor 2; 417, cutting groove 1; 5, unwinding component; 51, notch; 52, installation groove; 53, metal strip roll; 6 , conveying assembly; 61, bracket; 62, roller; 63, arc convex edge; 7, pressing and cutting assembly; 71, pressure seat; 72, pressure seat; 73, T-shaped column 2; 74, spring 4; 75, cutter 2; 76, heating plate; 77, extension table; 78, cutting groove 2; 79, vertical plate; 710, swing arm; 8, material organization mechanism; 81, L-shaped support; 82, bracket; 83, outer ring; 84, conveying channel; 85, inner ring; 86, running groove; 87. Bump; 88. Round plate; 89. Connecting groove; 810. Disc; 811. Sealing plate; 812. Feed hopper; 813. Discharge arc plate; 814. Straight plate; 9. Anti-rewinding mechanism; 91. Rotating shaft; 92. Rubber roller; 93. Ratchet; 94. Baffle; 95. Paw; 10. Collecting mechanism; 101. Outer frame; 102. Slot; 103. Inner frame; 104. Bump plate; 11. Support platform; 12. Rib plate; 13. Conveyor belt. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] A precision stamping and forming equipment for automatically producing shielding covers is characterized by the stamping and forming of precision die forgings for producing aviation metal shielding covers, and its IPC classification number is B21D22 / 00.

[0045] Example 1

[0046] Refer to the instruction manual Figure 1-4 and Figure 15-16 According to an embodiment of the present invention, a precision stamping and forming device for automatically producing shielding covers comprises a base 1, an L-shaped mounting frame 2 is fixedly provided on one side of the top of the base 1, a support 11 is fixedly provided on the inner side of the mounting frame 2, and an inclined rib plate 12 is fixedly provided between the bottom of the support 11 and the mounting frame 2, a lower die assembly 4 is provided on one end of the top of the support 11, an upper die assembly 3 is provided at a position corresponding to the lower die assembly 4 on the inner top of the mounting frame 2, and stamping oil supply parts are provided on both the upper die assembly 3 and the lower die assembly 4.

[0047] It should be noted that the present invention realizes the stamping of the metal strip into the target workpiece (i.e., the shielding cover, see Figure 15-16 The stamping oil supply unit is used to apply stamping oil to the forming surface of the metal strip during stamping of the metal strip, so as to improve the stability of stamping of the metal strip and the protection of the mold.

[0048] Specifically, Figure 2 and Figure 5 As shown, the upper die assembly 3 includes an upper die seat 31 arranged at the top inner side of the mounting frame 2, a lifting channel 32 is vertically penetrated at the center of the upper die seat 31, a die head 33 of T-shaped structure is movably sleeved inside the lifting channel 32, a cutter 1 310 is fixedly provided on the bottom end surface of the upper die seat 31, a lifting plate 38 is arranged on the top of the die head 33, a plurality of drilling columns 39 are fixedly provided on the bottom of the lifting plate 38, a through hole is vertically penetrated at the position corresponding to each drilling column 39 on the top of the die head 33, and the bottom end of the drilling column 39 is movably plugged into the corresponding through hole, two cylinders 1 311, two cylinders 2 312 and two cylinders 3 313 are fixedly installed between the top ends of the upper die seat 31, the die head 33 and the lifting plate 38 and the top of the inner side of the mounting frame 2 respectively;

[0049] The stamping oil supply part of the upper die assembly 3 includes a groove opened at the center position of the bottom of the die head 33 and a supply pipe 314 installed on the top of the die head 33 and connected with the groove. The top end of the supply pipe 314 movably penetrates the lifting plate 38. The inner cavity of the groove is movably sleeved with a cotton block 35 and a movable block 34 from top to bottom. A T-shaped column 36 is fixedly provided at the center position of the top of the movable block 34, and the top end of the T-shaped column 36 movably penetrates the die head 33 and the lifting plate 38 in turn. A spring 37 is movably sleeved on the outer peripheral surface of one end of the T-shaped column 36 extending to the top of the lifting plate 38. The two ends of the spring 37 are respectively fixedly connected to the lifting plate 38 and the T-shaped column 36. A plurality of through holes are vertically penetrated at the top of the movable block 34.

[0050] It should be noted that when the spring 1 37 is in a natural state, the bottom end of the movable block 34 extends to the outside of the groove under the push of the T-shaped column 1 36. At this time, the cotton block 35 soaked in the stamping oil is in a non-extruded state. At the same time, an electromagnetic valve is added to the supply pipe 314, so that after the upper mold assembly 3 and the lower mold assembly 4 complete a round of mold closing action, the control end controls the replenishment of the stamping oil to ensure the wettability of the cotton block 35 and the stability of the extrusion amount of the stamping oil; wherein, in the process of the upper mold assembly 3 and the lower mold assembly 4 completing the mold closing to realize stamping forming, the upper mold assembly 3 includes the following three actions:

[0051] Action 1: Cylinder 1 311, cylinder 2 312 and cylinder 3 313 act synchronously to allow the upper die holder 31 to complete the full mold closing action. During this action, the movable block 34 on the die head 33 will move upward under the reaction force of the metal strip to compress the cotton block 35, and push the T-shaped column 1 36 to stretch the spring 1 37. The cotton block 35 soaked in stamping oil will be pressed and the stamping oil discharged will flow along the through hole to the surface of the metal strip. After the upper die holder 31 completes the full mold closing action, the cutter 1 310 will trim the metal strip and divide the trimmed frame into two.

[0052] Action 2: Cylinder 1 311 stops moving, so that the upper die base 31 remains in a fully closed state, and cylinder 2 312 and cylinder 3 313 continue to move synchronously, pushing the die head 33 downward to press the metal strip, thus completing the stamping of the finished shielding cover contour;

[0053] Action three, cylinder one 311 remains in the stopped state, and at the same time, cylinder two 312 stops moving, so that the formed shield cover contour maintains the current state, and cylinder three 313 continues to move, pushing the lifting plate 38 to move downward, thereby pushing the drilling column 39 to move downward, completing the punching of the bottom end surface of the finished shield cover contour;

[0054] After the above three actions are completed, the target finished shielding cover can be obtained. The design of the upper mold assembly 3 breaks through the traditional horizontal continuous mold structure design. The structural design is ingenious, which can save the space occupied by the stamping mold, and each action is progressive, which improves the quality of stamping.

[0055] Specifically, Figure 2-4 and Figure 6-8 As shown, the lower die assembly 4 includes a lower die base 41 fixedly arranged on the top of the support platform 11, a cavity is arranged on the top of the lower die base 41, a cavity 42 is fixedly arranged at the position of the bottom of the cavity corresponding to the die head 33, and a thin film pressure sensor 416 is installed at the position of the bottom of the cavity located inside the cavity 42, a lifting platform 43 is arranged on the top of the lower die base 41, telescopic columns 44 are installed between the two ends of the bottom of the lifting platform 43 and the bottom of the cavity, and springs 45 are movably sleeved on the outside of the two telescopic columns 44, sink grooves 46 are opened on the top of both sides of the cavity, and a thin film pressure sensor 47 is installed on the bottom end surface of the sink groove 46, and a cutting groove 417 is opened at the position of the top of the lifting platform 43 corresponding to the cutting knife 310;

[0056] The stamping oil supply part of the lower mold assembly 4 includes a cavity 48 opened at both ends of the lifting platform 43 and a square ring cavity 49 on the lifting platform 43 located between the two cavities 48, and an isolation part is formed between the two ends of the square ring cavity 49 and the corresponding cavities. A cotton ring 410 is fixedly embedded at a position corresponding to the bottom end of the square ring cavity 49 on the inner circumference of the lifting platform 43. Liquid capsules 411 are fixedly provided inside the two cavities 48. The two liquid capsules 411 are fixedly connected with movable columns 412 at opposite ends, and the two movable columns 412 are movable at opposite ends to successively penetrate the isolation parts and the lifting platform 43 at corresponding positions. A spring three 413 is movably sleeved at a position on the outer circumference of the movable column 412 located between the corresponding isolation part and the liquid capsule 411. The bottom end of the liquid capsule 411 is connected with a liquid inlet pipe 414 and a liquid outlet pipe 415. The other end of the liquid outlet pipe 415 is connected with the square ring cavity 49, and the other end of the liquid inlet pipe 414 successively penetrates the lifting platform 43 and the lower mold base 41.

[0057] It should be noted that the elastic coefficient of the second spring 45 is greater than the elastic coefficient of the first spring 37, so that when the above-mentioned action 1 is completed, the stamping oil is first squeezed out, and then the upper die holder 31 is fully closed, and in the process of fully closing the die, the stamping oil is evenly coated on the upper surface of the metal strip;

[0058] The part of the movable column 412 extending to the inner side of the lifting platform 43 is designed as a V-shaped structure, and when the spring 413 is in a natural state, the V-shaped end of the movable column 412 is just completely exposed inside the lifting platform 43. In addition, a one-way valve is added to the liquid inlet pipe 414 and the liquid outlet pipe 415, and the specific position depends on the actual situation. In this way, it can be ensured that the stamping oil is squeezed into the square ring cavity 49 during the compression process of the liquid capsule 411, and the stamping oil inside the liquid capsule 411 is automatically replenished during the resetting process of the liquid capsule 411;

[0059] The telescopic column 44 can be in the form of a sleeve rod and a sleeve, that is, the sleeve rod is fixed to the lifting platform 43, the sleeve is fixed to the bottom end surface of the inner cavity, and the other end of the sleeve rod is inserted into the sleeve to ensure that the lifting platform 43 is pressed down and the spring 2 45 is vertically compressed downward.

[0060] Among them, during the aforementioned action one, cylinder one 311, cylinder two 312 and cylinder three 313 act synchronously until the upper die base 31 completely presses the lifting platform 43 into the cavity on the lower die base 41. At this time, the film pressure sensor one 47 inside the sink 46 detects the pressure change and transmits the signal back to the control end, which controls the cylinder one 311 to stop the action. At the same time, cylinder two 312 and cylinder three 313 continue to act synchronously. During the aforementioned action two, the die head 33 is pushed downward to punch out the target workpiece contour of the metal strip. When the film pressure sensor two 416 detects the pressure change and keeps constant, the signal is transmitted back to the control end, which controls the cylinder two 312 to stop the action. At the same time, the cylinder three 313 continues to act, completing the punching process of action three.

[0061] In the process of stamping the contour of the target workpiece, the deformed metal strip will squeeze the movable column 412, causing the movable column 412 to retract into the cavity 48 and stretch the spring three 413. At the same time, the liquid capsule 411 will be squeezed, and the pressurized liquid capsule 411 will discharge the stamping oil from the liquid outlet pipe 415 to the inside of the square ring cavity 49, and the stamping oil entering the square ring cavity 49 will infiltrate the cotton ring 410, so that in the process of stamping the contour of the target workpiece, the deformed metal strip is squeezed and contacted with the cotton ring 410 infiltrated with the stamping oil, and the stamping oil seeping out of the squeezed cotton ring 410 is coated on the surface of the metal strip. After completing a round of stamping, the movable column 412 pulls the liquid capsule 411 to reset under the action of the restoring force of the spring three 413, and automatically replenishes the hydraulic oil to ensure that the next round of compression of the liquid capsule 411 discharges the stamping oil, so that the cotton ring 410 remains in a fully infiltrated state.

[0062] After the above-mentioned stamping and forming process is completed, as the upper mold assembly 3 and the lower mold assembly 4 return to their initial states, the restoring force of spring 2 45 and spring 1 37 can be used to push the formed shielding cover to the cavity 42 and separate the die head 33, so that the metal strip to be stamped and formed in the subsequent process can be pushed away from the stamping and forming station without the need for manual assistance for separation, which is convenient and practical.

[0063] Example 2

[0064] Refer to the instruction manual Figure 1 According to an embodiment of the present invention, a precision stamping and forming device for automatically producing shielding covers comprises a base 1, an L-shaped mounting frame 2 is fixedly provided on one side of the top of the base 1, a support 11 is fixedly provided on the inner side of the mounting frame 2, and an inclined rib plate 12 is fixedly provided between the bottom of the support 11 and the mounting frame 2, a material preparation mechanism for supplying raw materials for shielding cover production is provided at one end of the top of the support 11, the material preparation mechanism consists of a reeling assembly 5, a conveying assembly 6 and a pressing and cutting assembly 7, and an anti-rewinding mechanism 9 is provided between the reeling assembly 5 and the conveying assembly 6.

[0065] It should be noted that the present invention utilizes the conveying component 6 to drive the unwinding component 5 to passively unwind the metal strip, and conveys the unwinding metal strip to the pressing and cutting station, and utilizes the pressing and cutting component 7 to cut the metal strip into a fixed length, and at the same time flattens the cut part. In addition, after the conveyed metal strip is cut, the anti-rewinding mechanism 9 is used to prevent the metal strip from rewinding, thereby ensuring that the material preparation process is carried out continuously and stably.

[0066] Specifically, Figure 1-4 and Fig. 9 As shown, the unwinding assembly 5 includes a slot 51 opened at the end of the support platform 11, and mounting slots 52 are opened on both sides of the inner cavity of the slot 51. The two mounting slots 52 are composed of connected straight slots and circular slots, and a metal strip roll 53 is installed between the circular slots on the two mounting slots 52.

[0067] It should be noted that the upper part of the straight groove is tangent to the upper part of the circular groove, and the lower part of the circular groove is lower than the lower part of the straight groove, which can ensure that the metal strip roll 53 will not be dislocated after being placed inside the installation groove 52, but will not affect the rotation and unwinding of the metal strip roll 53. In the process of installing the metal strip roll 53, the winding roller of the metal strip roll 53 is pre-positioned between the two circular grooves, and then under the conveying action of the conveying component 6, the metal strip roll 53 is driven to be passively unwound.

[0068] Specifically, Figure 2-4 and Fig.12As shown, the conveying assembly 6 includes two brackets 61 fixed on the top of the support platform 11, and two rollers 62 driven by a driving motor are rotatably installed between the two brackets 61. The outer peripheral surfaces of the two rollers 62 are fixedly provided with arc-shaped convex edges 63.

[0069] It should be noted that when the arc-shaped convex edges 63 on the two rollers 62 rotate to a relative state, the minimum distance between the two arc-shaped convex edges 63 is equal to the thickness of the metal strip, and anti-slip protrusions are provided on the contact surface between the arc-shaped convex edges 63 and the metal strip, which are used to drive the metal strip roll 53 passively and convey the unwound metal strip to the pressing and cutting station. When the arc-shaped convex edges 63 on the two rollers 62 rotate to a back-to-back state, the distance between the two rollers 62 is greater than the thickness of the metal strip. At this time, the metal strip roll 53 stops unwinding, and the unwound metal strip stops being conveyed to the pressing and cutting station. In this way, intermittent fixed-length feeding can be achieved.

[0070] Specifically, Figure 2 and Fig.12 As shown, the anti-rewinding mechanism 9 includes a rotating shaft 91 rotatably installed between opposite sides of the two brackets 61, one end of the rotating shaft 91 located at the upper position extends to the outside of the bracket 61 and is fixedly sleeved with a ratchet 93, and the outer circumferential surfaces of the two rotating shafts 91 located between the two brackets 61 are fixedly sleeved with rubber rollers 92, and the top end of the outer side of the bracket 61 close to the ratchet 93 is fixedly provided with a baffle 94 and a round rod, and a ratchet 95 is rotatably installed on the outer circumferential surface of the round rod through a bearing.

[0071] It should be noted that the distance between the two rubber rollers 92 is equal to the thickness of the metal strip, and the metal strip is conveyed forward in a horizontal state after being conveyed and guided by the rubber rollers 92. When the conveyed metal strip is cut by the pressing and cutting assembly 7, the arc-shaped convex edges 63 on the two rollers 62 are just rotated to the state of facing each other (refer to Figure 4 In the reverse state of the two arc-shaped convex edges 63 in the middle), at this time, due to the lack of restriction of the conveying component 6, the metal strip connected to the metal strip coil 53 after being cut off is prone to rewinding (i.e., sliding away from the area between the two rollers 62). When the cut end of the metal strip is rewound, it will drive the two rubber rollers 92 to rotate in the opposite direction to that when the metal strip is conveyed forward, thereby driving the ratchet 93 to reverse and moving the ratchet 95 to swing in the direction of the baffle 94. However, due to the existence of the baffle 94, the ratchet 95 cannot swing in the opposite direction, resulting in the rubber roller 92 being unable to rotate, thereby preventing the metal strip connected to the metal strip coil 53 after being cut off from rolling back.

[0072] Specifically, Figure 1-4 and Fig.10As shown, the pressure-cutting assembly 7 includes a pressure seat 71 fixedly mounted on the top of the support platform 11, a pressure seat 72 is arranged on the top of the pressure seat 71, T-shaped columns 73 are fixedly arranged at the four corners of the top of the pressure seat 72, and the tops of the four T-shaped columns 73 are movably penetrated through the mounting frame 2, and the outer peripheral surface of one end of each T-shaped column 73 extending to the top of the mounting frame 2 is movably sleeved with a spring 74, and the pressure seat 71 and the pressure seat 72 are respectively fixed with an extension platform 77 and a cutter 75 at one end close to the conveying assembly 6, and a cutting groove 78 is opened at the top of the extension platform 77 at a position corresponding to the cutter 75, and a heating plate 76 is fixedly embedded on the opposite sides of the pressure seat 71 and the pressure seat 72, and two vertical plates 79 are fixedly arranged on the inner top of the mounting frame 2, and a swing arm 710 is rotatably installed between the opposite sides of the two vertical plates 79 through a rotating rod.

[0073] It should be noted that when the arc-shaped convex edges 63 on the two rollers 62 rotate to Figure 4 In the state shown, the spring four 74 is just in the natural state. At this time, the distance between the pressure seat 72 and the pressure seat 71 is greater than the thickness of the metal strip. As the roller 62 rotates, the unwound metal strip will be gradually conveyed to the pressing and cutting station. When the roller 62 rotates until the distance between the two arc-shaped convex edges 63 is greater than the thickness of the metal strip, the conveying assembly 6 stops conveying the metal strip forward. As the roller 62 rotates, the arc-shaped convex edge 63 at the upper end gradually contacts the corresponding end of the swing arm 710 and pushes it upward. Since the swing arm 710 is rotatably installed between the two vertical plates 79, when one end of the swing arm 710 is pushed upward, the other end of the swing arm 710 swings downward with the rotating rod as the central axis, thereby pressing the pressure seat 72 downward and compressing the spring four 74.

[0074] When one end of the swing arm 710 is pushed up to the highest position, the distance between the pressure seat 72 and the pressure seat 71 is equal to the thickness of the metal strip. At this time, the cutter 75 at the end of the pressure seat 72 can be used to cut the metal strip, and the cut metal strip can be flattened by the pressure seat 72 and the pressure seat 71. At the same time, the heating plate 76 embedded on the opposite side of the pressure seat 71 and the pressure seat 72 can be used to preheat the metal strip during the flattening process, so that the metal strip can be easier to be stamped and formed subsequently.

[0075] Example 3

[0076] Refer to the instruction manual Figure 1-2 and Fig.11According to an embodiment of the present invention, a precision stamping and forming device for automatically producing shielding covers is provided. A collecting mechanism 10 is provided at a position on the top of the base 1 corresponding to the lower mold assembly 4. The collecting mechanism 10 includes an outer frame 101 fixed to the top of the base 1. An inner frame 103 with a mesh structure is movably sleeved inside the outer frame 101. Slots 102 are provided at both ends of the top of the outer frame 101. Protruding plates 104 are fixed at positions on the tops of both sides of the inner frame 103 corresponding to the slots 102, and the protruding plates 104 are embedded in the slots 102 at corresponding positions.

[0077] It should be noted that leakage holes of the same size as the perforations are vertically penetrated at the bottom of the cavity on the lower die base 41 and at the position of the corresponding drilling column 39 on the support 11, and a leakage groove is also provided on the top of the support 11, so that the scraps generated during the punching and trimming process can fall smoothly into the inner frame 103. At the same time, the stamping oil leaking from the leakage hole during the stamping process will also fall into the inner frame 103, and finally seep into the outer frame 101, which is conducive to the subsequent reuse of the separated stamping oil and scraps.

[0078] Example 4

[0079] Refer to the instruction manual Figure 1-4 and Figure 13-14 , an embodiment of the present invention is a precision stamping and forming equipment for automatically producing shielding covers, wherein a material-forming mechanism 8 and a conveyor belt 13 are installed at one end of the top of the base 1 away from the material preparation mechanism, and the material-forming mechanism 8 includes an L-shaped support 81 fixedly installed on the top of the base 1, a bracket 82 is fixedly installed at the end of the horizontal section inside the L-shaped support 81, and a servo motor is fixedly installed at the end of the vertical section inside the L-shaped support 81, an outer ring 83 is fixedly connected to the top of the bracket 82, and two conveying grooves 84 are connected on the outer circumferential surface of the outer ring 83, an inner ring 85 is movably sleeved inside the outer ring 83, a straight plate 814 is fixedly connected to the end of the output shaft of the servo motor, and a straight rod is fixedly connected between the end of the straight plate 814 away from the servo motor and the inner ring 85;

[0080] A circular plate 88 is provided on the inner side of the inner ring 85, and a disc 810 is fixedly provided on the side of the circular plate 88 close to the straight plate 814, and a connecting groove 89 is provided on the side of the circular plate 88 away from the disc 810, and a sealing plate 811 is provided on the side of the outer ring 83 away from the straight plate 814, and the sealing plate 811 is fixed to the outer ring 83 and the circular plate 88 by bolts, and the ends of the two conveying channels 84 are respectively fixedly connected with a feed hopper 812 and a discharge arc plate 813, and the discharge arc plate 813 and the conveyor belt 13 have a smooth transition, and the outer peripheral surface of the end of the inner ring 85 away from the straight plate 814 is provided with four annular and evenly distributed through grooves 86, and a protrusion 87 is fixed on one side of the inner cavity of each through groove 86.

[0081] It should be noted that the extension lines of one end of the two conveying channels 84 are arranged vertically after intersecting, and after the circular plate 88 is installed, the connecting groove 89 and the conveying channel 84 at the lower end are arranged in a colinear manner; the diameter of the disc 810 is larger than the inner diameter of the inner ring 85 but smaller than the outer diameter of the inner ring 85, so as to cooperate with the sealing plate 811 to confine the inner ring 85 inside the outer ring 83, but will not affect the rotation of the inner ring 85.

[0082] Among them, after the finished shielding cover is pushed away from the stamping and forming station by the metal strip to be stamped and formed in the subsequent process, the finished shielding cover leaving the stamping and forming station will fall into the inside of the feed hopper 812, and enter the travel groove 86 on the inner ring 85 along the corresponding conveying channel 84, and rotate synchronously with the inner ring 85 driven by the servo motor in the travel groove 86 at the current position, and finally enter the inside of the discharge arc plate 813 through another conveying channel 84, and then slide onto the conveyor belt 13 for conveying to the next station. This process includes the following two situations:

[0083] If the finished shielding cover falls with the concave surface facing upward, after entering the corresponding passage groove 86, the finished shielding cover will be buckled on the protrusion 87 as the inner ring 85 rotates, and will not slide when the inner ring 85 rotates to the upper end position colinear with the connecting groove 89. Instead, the finished shielding cover will be released from the state of being buckled on the protrusion 87 when the inner ring 85 rotates to the lower end position colinear with the connecting groove 89, and will enter the discharge arc plate 813 along the conveying groove 84 at the lower end position and be discharged;

[0084] If the finished shielding cover falls with the convex surface facing upward, then after entering the corresponding passage groove 86, as the inner ring 85 rotates, the finished shielding cover will press against the protrusion 87 where it is located, and when the inner ring 85 rotates to the upper end position colinear with the connecting groove 89, it will directly slide along the connecting groove 89 to the inside of the conveying groove 84 at the lower end position, and then enter the discharge arc plate 813 for discharge.

[0085] In the above technical scheme, the circuits, electronic components and control modules involved are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content to be protected by the present invention does not involve improvements to software and methods.

[0086] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

[0087] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0088] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A precision stamping and forming device for automatically producing a shielding cover, comprising a base (1), a mounting frame (2) of an L-shaped structure being fixedly arranged on one side of the top of the base (1), characterized in that: A support platform (11) is fixedly provided on the inner side of the mounting frame (2), and an inclined rib plate (12) is fixedly provided between the bottom of the support platform (11) and the mounting frame (2); a lower mold assembly (4) is provided at one end of the top of the support platform (11), and an upper mold assembly (3) is provided at the position of the inner top of the mounting frame (2) corresponding to the lower mold assembly (4); The upper die assembly (3) comprises an upper die seat (31) arranged at the top inner side of the mounting frame (2), a lifting channel (32) vertically penetrates through the center of the upper die seat (31), a T-shaped die head (33) is movably sleeved inside the lifting channel (32), a cutter (310) is fixedly provided on the bottom end surface of the upper die seat (31), and a lifting plate (38) is provided on the top of the die head (33); A plurality of drilling columns (39) are fixedly provided at the bottom of the lifting plate (38), a through hole is vertically penetrated at the position corresponding to each drilling column (39) at the top of the die head (33), and the bottom end of the drilling column (39) is movably inserted into the corresponding through hole, and two cylinders 1 (311), two cylinders 2 (312) and two cylinders 3 (313) are respectively fixedly installed between the top ends of the upper die base (31), the die head (33) and the lifting plate (38) and the inner top of the mounting frame (2); The lower die assembly (4) comprises a lower die base (41) fixedly mounted on the top of the support platform (11); a cavity is arranged on the top of the lower die base (41); a mold cavity (42) is fixedly mounted at a position of the bottom of the inner cavity corresponding to the die head (33); and a second thin film pressure sensor (416) is mounted at a position of the bottom of the inner cavity located inside the mold cavity (42); A lifting platform (43) is arranged on the top of the lower die base (41), telescopic columns (44) are installed between the two ends of the bottom of the lifting platform (43) and the bottom of the cavity, and springs (45) are movably sleeved on the outside of the two telescopic columns (44), and grooves (46) are opened on the top of both sides of the cavity, and a thin film pressure sensor (47) is installed on the bottom end surface of the groove (46), and a cutting groove (417) is opened at the top of the lifting platform (43) at a position corresponding to the cutting knife (310); The upper die assembly (3) and the lower die assembly (4) are both provided with a stamping oil supply portion, the stamping oil supply portion of the upper die assembly (3) comprising a groove opened at the center position of the bottom of the die head (33) and a supply pipe (314) installed at the top of the die head (33) and connected to the groove, the top end of the supply pipe (314) movably passes through the lifting plate (38), and the inner cavity of the groove is movably sleeved with a cotton block (35) and a movable block (34) in sequence from top to bottom; A T-shaped column (36) is fixedly provided at the center position of the top of the movable block (34), and the top of the T-shaped column (36) movably penetrates the die head (33) and the lifting plate (38) in sequence, and a spring (37) is movably sleeved on the outer peripheral surface of one end of the T-shaped column (36) extending to the top of the lifting plate (38), and the two ends of the spring (37) are respectively fixedly connected to the lifting plate (38) and the T-shaped column (36), and a plurality of through holes are vertically penetrated through the top of the movable block (34); The stamping oil supply part of the lower die assembly (4) comprises cavities (48) opened at both ends of the lifting platform (43) and a square ring cavity (49) on the lifting platform (43) between the two cavities (48), and an isolation part is formed between the two ends of the square ring cavity (49) and the corresponding cavities, a cotton ring (410) is fixedly embedded at a position of the inner circumference of the lifting platform (43) corresponding to the bottom end of the square ring cavity (49), and liquid capsules (411) are fixedly provided inside the two cavities (48), and movable columns (412) are fixedly connected to opposite ends of the two liquid capsules (411), and the two movable columns (412) are movable at opposite ends to sequentially penetrate the isolation part and the lifting platform (43) at the corresponding position; The movable sleeve of the movable column (412) is provided with a spring three (413) at a position between the corresponding isolation portion and the liquid capsule (411) on the outer peripheral surface thereof; the bottom end of the liquid capsule (411) is connected with a liquid inlet pipe (414) and a liquid outlet pipe (415); the other end of the liquid outlet pipe (415) is connected with the square ring cavity (49); the other end of the liquid inlet pipe (414) passes through the lifting platform (43) and the lower mold base (41) in sequence; A material preparation mechanism for supplying raw materials for producing shielding covers is provided at one end of the top of the support platform (11) away from the lower mold assembly (4), the material preparation mechanism comprising an unwinding assembly (5), a conveying assembly (6) and a pressing and cutting assembly (7), and an anti-rewinding mechanism (9) is provided between the unwinding assembly (5) and the conveying assembly (6).

2. The precision stamping and forming equipment for automatically producing shielding covers according to claim 1, characterized in that: The unwinding assembly (5) comprises a slot (51) formed at the end of the support platform (11), and mounting slots (52) are formed on both sides of the inner cavity of the slot (51), and the two mounting slots (52) are composed of a straight slot and a circular slot that are connected, and a metal strip roll (53) is installed between the circular slots on the two mounting slots (52).

3. The precision stamping and forming equipment for automatically producing shielding covers according to claim 1, characterized in that: The conveying assembly (6) comprises two brackets (61) fixed on the top of the support platform (11), two rollers (62) driven by a driving motor are rotatably mounted between the two brackets (61), and the outer circumferences of the two rollers (62) are fixedly provided with arc-shaped convex edges (63).

4. The precision stamping and forming equipment for automatically producing shielding covers according to claim 1, characterized in that: The pressure cutting assembly (7) comprises a pressure bearing seat (71) fixedly mounted on the top of the support platform (11), a pressure seat (72) being arranged on the top of the pressure bearing seat (71), two T-shaped columns (73) being fixedly arranged at the four corners of the top of the pressure seat (72), and the tops of the four two T-shaped columns (73) are all movably penetrated through the mounting frame (2), and the outer peripheral surface of one end of each two T-shaped columns (73) extending to the top of the mounting frame (2) is movably sleeved with a four spring (74); An extension platform (77) and a second cutter (75) are fixedly provided at one end of the pressure-bearing seat (71) and the pressure seat (72) close to the conveying assembly (6), respectively, and a second cutting groove (78) is provided at the top end of the extension platform (77) corresponding to the position of the second cutter (75). A heating plate (76) is fixedly embedded on the opposite sides of the pressure-bearing seat (71) and the pressure seat (72). Two vertical plates (79) are fixedly provided on the top inner side of the mounting frame (2), and a swing arm (710) is rotatably installed between the opposite sides of the two vertical plates (79) via a rotating rod.

5. The precision stamping and forming equipment for automatically producing shielding covers according to claim 3 is characterized in that: The anti-rewinding mechanism (9) comprises a rotating shaft (91) rotatably mounted between opposite sides of two brackets (61); one end of the rotating shaft (91) located at the upper side extends to the outside of the bracket (61) at the location and is fixedly sleeved with a ratchet (93); the outer circumferential surfaces of the two rotating shafts (91) located between the two brackets (61) are fixedly sleeved with a rubber roller (92); a baffle (94) and a round rod are fixedly mounted on the outer top end of the bracket (61) near the ratchet (93); and a ratchet (95) is rotatably mounted on the outer circumferential surface of the round rod via a bearing.

6. The precision stamping and forming equipment for automatically producing shielding covers according to claim 1, characterized in that: A collecting mechanism (10) is arranged at a position on the top of the base (1) corresponding to the lower mold assembly (4), the collecting mechanism (10) comprising an outer frame (101) fixed to the top of the base (1), an inner frame (103) with a mesh structure movably sleeved inside the outer frame (101), a clamping groove (102) being provided at both ends of the top of the outer frame (101), convex plates (104) being fixed at positions on the tops of both sides of the inner frame (103) corresponding to the clamping grooves (102), and the convex plates (104) being embedded in the clamping grooves (102) at corresponding positions.

7. The precision stamping and forming equipment for automatically producing shielding covers according to claim 1, characterized in that: A material-forming mechanism (8) and a conveyor belt (13) are also installed at one end of the top of the base (1) away from the material preparation mechanism, the material-forming mechanism (8) comprises an L-shaped support (81) fixedly installed on the top of the base (1), a bracket (82) is fixedly provided at the end of the horizontal section inside the L-shaped support (81), and a servo motor is fixedly installed at the end of the vertical section inside the L-shaped support (81), an outer ring (83) is fixedly connected to the top of the bracket (82), two conveying grooves (84) are connected on the outer peripheral surface of the outer ring (83), an inner ring (85) is movablely sleeved inside the outer ring (83), a straight plate (814) is fixedly connected to the end of the output shaft of the servo motor, and a straight rod is fixedly connected between the end of the straight plate (814) away from the servo motor and the inner ring (85); A circular plate (88) is provided on the inner side of the inner ring (85), and a circular disc (810) is fixedly provided on the side of the circular plate (88) close to the straight plate (814). A connecting groove (89) is provided on the side of the circular plate (88) away from the circular disc (810). A sealing plate (811) is provided on the side of the outer ring (83) away from the straight plate (814). The sealing plate (811) is fixed to the outer ring (83) and the circular plate (88) by bolts. The ends of the two conveying channels (84) are respectively fixedly connected to a feed hopper (812) and a discharge arc plate (813), and a smooth transition is formed between the discharge arc plate (813) and the conveyor belt (13). Four circularly evenly distributed running grooves (86) are provided on the outer peripheral surface of one end of the inner ring (85) away from the straight plate (814), and a protrusion (87) is fixedly provided on one side of the inner cavity of each running groove (86).

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