Bearing forging production line and process
阅读说明:本技术 一种轴承锻造生产线及工艺 (Bearing forging production line and process ) 是由 张汉民 李慧敏 苏东海 于 2020-05-15 设计创作,主要内容包括:本发明公开了一种轴承锻造生产线及工艺,属于轴承加工技术领域,包括上料输送机构、移动组件、固定组件、冲孔组件、搬运组件、降温组件、镦粗组件和成型组件,所述上料输送机构呈竖直设置,所述移动组件设置在上料输送机构的旁侧,所述固定组件设置在移动组件上且移动组件与固定组件滑动配合,所述镦粗组件设置在搬运组件的旁侧,所述成型组件设置在镦粗组的旁侧,所述冲孔组件设置在镦粗组件的旁侧,所述搬运组件设置在移动组件的出料端,所述降温组件设置在搬运组件的旁侧。本发明通过轴承锻造生产线上的每个装置之间的相互配合作业,提高了锻造的生产效率和锻造的精确性。(The invention discloses a bearing forging production line and a bearing forging production process, which belong to the technical field of bearing processing, and comprise a feeding conveying mechanism, a moving assembly, a fixing assembly, a punching assembly, a carrying assembly, a cooling assembly, an upsetting assembly and a forming assembly, wherein the feeding conveying mechanism is vertically arranged, the moving assembly is arranged beside the feeding conveying mechanism, the fixing assembly is arranged on the moving assembly and is in sliding fit with the moving assembly, the upsetting assembly is arranged beside the carrying assembly, the forming assembly is arranged beside the upsetting assembly, the punching assembly is arranged beside the upsetting assembly, the carrying assembly is arranged at the discharge end of the moving assembly, and the cooling assembly is arranged beside the carrying assembly. According to the invention, through the mutual matching operation of each device on the bearing forging production line, the forging production efficiency and the forging accuracy are improved.)
1. A bearing forging production line is characterized by comprising a feeding conveying mechanism (1), a moving assembly (2), a fixing assembly (3), a punching assembly (4), a carrying assembly (5), a cooling assembly (6), an upsetting assembly (7) and a forming assembly (8), wherein the feeding conveying mechanism (1) is vertically arranged, the moving assembly (2) is arranged beside the feeding conveying mechanism (1), the fixing assembly (3) is arranged on the moving assembly (2), the moving assembly (2) is in sliding fit with the fixing assembly (3), the upsetting assembly (7) is arranged beside the carrying assembly (5), the forming assembly (8) is arranged beside the upsetting assembly (7), the punching assembly (4) is arranged beside the upsetting assembly (7), the carrying assembly (5) is arranged at the discharging end of the moving assembly (2), the cooling assembly (6) is arranged on the side of the carrying assembly (5), the feeding conveyor mechanism (1) is provided with a material moving cylinder (11) and a support frame (12), the material moving cylinder (11) is horizontally arranged on the side wall of the feeding conveyor mechanism (1) through the support frame (12), the output end of the material moving cylinder (11) is provided with a material moving plate (13), and the side wall of the feeding conveyor mechanism (1) is provided with a sliding chute (14) matched with the material moving plate (13) in a sliding mode.
2. The bearing forging line of claim 1, wherein: the moving assembly (2) comprises a moving frame (21), a moving motor (22), a forging moving platform (23), a connecting block (24), a chain (25), two mounting seats (26) and two chain wheels (27), the moving frame (21) is vertically arranged at the side of the feeding conveying mechanism (1), two symmetrically arranged slide rails (28) are arranged on the moving frame (21), the two mounting seats (26) are symmetrically arranged at two ends of the slide rails (28), the two chain wheels (27) are respectively arranged on the two mounting seats (26), the two chain wheels (27) are respectively in rotating connection with the two mounting seats (26), the chain (25) is sleeved on the two chain wheels (27), the forging moving platform (23) is arranged on the moving frame (21), the forging moving platform (23) is in sliding fit with the two sliding rails (28), and two ends of the connecting block (24) are respectively and fixedly connected with the chain (25) and the forging moving table (23).
3. The bearing forging line of claim 2, wherein: the fixed component (3) comprises a fixed motor (31), a fixed gear (32), two fixed toothed plates (33) and two semicircular fixed ring plates (34), a mounting plate (231) horizontally arranged in the forging moving platform (23) is arranged, the fixed motor (31) is arranged in the forging moving platform (23) and the output end of the fixed motor (31) is vertically and upwards arranged, the fixed gear (32) is arranged at the output end of the fixed motor (31), the two fixed toothed plates (33) are symmetrically arranged at the top of the mounting plate (231) and are in sliding fit with the mounting plate (231), the two fixed toothed plates (33) are meshed with the fixed gear (32), each fixed toothed plate (33) is provided with a sliding column in sliding fit with the forging moving platform (23), the two semicircular fixed ring plates (34) are respectively fixedly connected with the tops of the two sliding columns, the two semicircular fixed ring plates (34) are in sliding fit with the forging moving table (23).
4. The bearing forging line of claim 2, wherein: the upsetting assembly (7) comprises a first mounting frame (71), a forging punch (72) and a forging round block (73), wherein the first mounting frame (71) is vertically arranged at the side of the moving frame (21), the forging punch (72) is vertically arranged at the top of the first mounting frame (71) and the output end of the forging punch (72) is vertically arranged downwards, and the forging round block (73) is arranged at the output end of the forging punch (72).
5. The bearing forging line of claim 4, wherein: the punching assembly (4) comprises a second mounting frame (41), a punching machine (42) and a punching head (43), wherein the second mounting frame (41) is vertically arranged at the side of the first mounting frame (71), the punching machine (42) is arranged at the top of the second mounting frame (41) and the output end of the punching machine (42) is vertically arranged downwards, and the punching head (43) is arranged at the output end of the punching machine (42).
6. The bearing forging line of claim 2, wherein: the carrying assembly (5) comprises a carrying seat (51), a rotating motor (52), a rotating disc (53), a lifting cylinder (54), a carrying plate (55) and two four-claw air clamps (56), wherein the carrying seat (51) is vertically arranged on the side of the output end of the moving frame (21), the rotating motor (52) is arranged at the top of the carrying seat (51) and the output end of the rotating motor (52) is vertically and upwards arranged, the rotating disc (53) is arranged at the output end of the rotating motor (52), the lifting cylinder (54) is vertically arranged at the top of the rotating disc (53), the carrying plate (55) is horizontally arranged at the output end of the lifting cylinder (54), and the four-claw air clamps (56) are symmetrically arranged at the bottoms of the two ends of the carrying plate (55).
7. The bearing forging line of claim 6, wherein: the cooling assembly (6) comprises a cooling box (61), a movable screen plate (62), four driving motors (63) and four driving screw rods (64), the cooling box (61) is arranged beside the carrying seat (51), a feed inlet (612) is formed in the top of the cooling box (61), the four driving motors (63) are arranged at the top of the cooling box (61) in a rectangular mode, the output ends of the four driving motors (63) are vertically and downwards arranged, the four driving screw rods (64) are arranged in the cooling box (61) in a rectangular mode, the two ends of the four driving screw rods (64) are respectively in rotating connection with the cooling box (61), the tops of the four driving screw rods (64) are respectively in fixed connection with the output ends of the corresponding driving motors (63), the movable screen plate (62) is horizontally arranged on the four driving screw rods (64) and is in threaded connection with the four driving screw rods (62), be equipped with on cooling box (61) inner wall connecting pipe (65) rather than fixed mounting, be equipped with a plurality of water spray pipes (66) on connecting pipe (65), the side of cooling box (61) is equipped with circulation cooling pump (67), the input of circulation cooling pump (67) is equipped with inlet tube (671) that extends to in cooling box (61), be equipped with outlet pipe (672) that extend to connecting pipe (65) on the output of circulation cooling pump (67), be equipped with on cooling box (61) rather than articulated discharge door (611).
8. The bearing forging line of claim 5, wherein: the shaping subassembly (8) include third mounting bracket (81), shaping punching machine (82) and shaping piece (83), third mounting bracket (81) set up between first mounting bracket (71) and second mounting bracket (41), shaping punching machine (82) set up at the top of third mounting bracket (81) and the vertical downward setting of output of shaping punching machine (82), shaping piece (83) set up on the output of shaping punching machine (82).
9. A bearing forging process is characterized in that: the production process comprises the following steps:
s1: when a bearing is forged, the feeding conveying mechanism (1) works to convey forged iron blocks forwards, when the feeding conveying mechanism (1) moves to the output end of the feeding conveying mechanism, the output end of the material moving cylinder (11) moves to drive the material moving plate (13) to move the iron blocks on the feeding conveying mechanism (1) to the forging moving platform (23) through the sliding chute (14), at the moment, the fixed motor (31) works to drive the fixed gear (32) to rotate, the fixed gear (32) rotates to drive the two fixed toothed plates (33) to move away from or towards each other on the mounting plate (231), the two fixed toothed plates (33) move to drive the two sliding columns to move on the forging moving platform (23), the two sliding columns move to drive the two semicircular fixed ring plates (34) to move, and the iron blocks moving to the forging moving platform (23) are fixed;
s2: after the iron block is fixed, a moving motor (22) works to drive two chain wheels (27) to rotate on two installation seats (26), the two chain wheels (27) rotate to drive a chain (25) to rotate so as to drive a connecting block (24) to move, the connecting block (24) moves to drive a forging moving platform (23) to move on two sliding rails (28) on a moving frame (21), the forging moving platform (23) moves to drive the iron block to move to the lower part of a first installation frame (71), a forging punching machine (72) works to drive a forging round block (73) to work to forge the iron block, the forging moving platform (23) moves to the lower part of a third installation frame (81) after forging, a forming punching machine (82) works to drive a forming block (83) to move, the forming block (83) moves to perform forming operation on the iron block, the forging moving platform (23) moves to the lower part of a second installation frame (41) after forming, the punching machine (42) works to drive the punching head (43) to move, the punching head (43) moves to punch the iron block, and the forged bearing is moved to the lower part of the carrying plate (55) through the forging moving platform (23) after the forging is finished;
s3: the output end of the lifting cylinder (54) moves to drive the carrying plate (55) to move, the four-jaw air clamp (56) is moved to the position above the forging moving table (23), the four-jaw air clamp (56) works to clamp the bearing, after clamping, the rotating motor (52) works to drive the rotating disc (53) to rotate so as to move the clamped bearing to the position above the cooling box (61), and the bearing is moved into the cooling box (61) through a feeding hole (612) in the cooling box (61);
s4: after the bearings are moved into the movable screen (62) in the cooling box (61), the four driving motors (63) work to drive the four driving screw rods (64) to rotate in the cooling box (61), the four driving screw rods (64) rotate to drive the movable screen (62) to move on the four driving screw rods (64), the bearings on the movable screen (62) are moved to the lower section of the cooling box (61), cooling the bearing on the movable screen plate (62), wherein in the cooling process, the circulating cooling pump (67) works to pump and cool the water cooled by the water inlet pipe (671), after the temperature is reduced, water is conveyed to the connecting pipe (65) through the water outlet pipe (672), the connecting pipe (65) conveys cold water to the bearing on the movable screen plate (62) through the water outlet pipes (672), and cooling the bearing, and taking out the forged bearing through a discharge door (611) after cooling.
Technical Field
The invention relates to the technical field of bearing processing, in particular to a bearing forging production line and a bearing forging process.
Background
In the field of machine manufacturing, bearings are increasingly used, and a bearing is a component for determining the relative movement position of a rotating shaft and other parts, and plays a role in supporting or guiding, and is a component for bearing gravity and transmitting power. The bearing is an important part in the modern mechanical equipment. Its main function is to support the mechanical rotator, reduce the friction coefficient in its motion process and ensure its rotation precision.
However, when the conventional bearing is forged, the bearing is forged manually, and when the bearing is machined manually, the machining efficiency is low, and the forging error is easily caused, so that the subsequent use of the bearing is influenced.
Disclosure of Invention
The invention aims to provide a bearing forging production line and a bearing forging production process, and aims to solve the technical problems that in the prior art, when a bearing is manually machined, the machining efficiency is low, forging errors are easily caused, and the subsequent use of the bearing is influenced.
In order to solve the technical problems, the invention provides the following technical scheme: a bearing forging production line and a bearing forging production process comprise a feeding conveying mechanism, a moving assembly, a fixing assembly, a punching assembly, a carrying assembly, a cooling assembly, an upsetting assembly and a forming assembly, wherein the feeding conveying mechanism is vertically arranged, the moving assembly is arranged beside the feeding conveying mechanism, the fixing assembly is arranged on the moving assembly, the moving assembly is in sliding fit with the fixing assembly, the upsetting assembly is arranged beside the carrying assembly, the forming assembly is arranged beside the upsetting assembly, the punching assembly is arranged beside the upsetting assembly, the carrying assembly is arranged at the discharge end of the moving assembly, the cooling assembly is arranged beside the carrying assembly, a material moving cylinder and a supporting frame are arranged on the feeding conveying mechanism, the material moving cylinder is horizontally arranged on the side wall of the feeding conveying mechanism through the supporting frame, a material moving plate is arranged at the output end of the material moving cylinder, and a sliding chute in sliding fit with the material moving plate is arranged on the side wall of the feeding conveying mechanism.
Further, the removal subassembly is including removing frame, mobile motor, forging mobile station, connecting block, chain, two mount pads and two sprockets, remove the vertical side that sets up at material loading conveyor of frame, it is equipped with the slide rail that two symmetries set up, two to remove to put up the mount pad symmetry sets up the both ends at the slide rail, two the sprocket sets up respectively on two mount pads and two sprockets rotate with two mount pads respectively and are connected, the chain cover is established on two sprockets, forge the mobile station setting on removing the frame and forge mobile station and two slide rail sliding fit, the both ends of connecting block respectively with chain and forging mobile station fixed connection.
Further, fixed subassembly includes fixed motor, fixed gear, two fixed tooth plates and two semicircle retaining ring boards, forge the mounting panel that is equipped with the level setting in the mobile station, fixed motor sets up in forging the mobile station and the vertical upwards setting of fixed motor's output, the fixed gear sets up on fixed motor's output, two fixed tooth plate symmetry sets up at the top of mounting panel and with mounting panel sliding fit, two fixed tooth plates and fixed gear meshing, every fixed tooth plate's top all is equipped with and forges mobile station sliding fit's traveller, two semicircle retaining ring board respectively with the top fixed connection of two travellers, two semicircle retaining ring board all with forge mobile station sliding fit.
Furthermore, the upsetting assembly comprises a first mounting frame, a forging punch and a forging round block, the first mounting frame is vertically arranged beside the moving frame, the forging punch is vertically arranged at the top of the first mounting frame and the output end of the forging punch is vertically arranged downwards, and the forging round block is arranged at the output end of the forging punch.
Further, the punching assembly comprises a second mounting frame, a punching machine and a punching head, wherein the second mounting frame is vertically arranged at the side of the first mounting frame, the punching machine is arranged at the top of the second mounting frame and the output end of the punching machine is vertically arranged downwards, and the punching head is arranged at the output end of the punching machine.
Further, the transport subassembly is including transport seat, rotation motor, rolling disc, lift cylinder, transport board and two four-jaw gas clamps, the vertical setting of transport seat is at the output side of removing the frame, the rotation motor sets up at the top of transport seat and the vertical upwards setting of output that rotates the motor, the rolling disc sets up on the output that rotates the motor, the vertical setting of lift cylinder is at the top of rolling disc, the transport board level sets up on the output of lift cylinder, two four-jaw gas clamp symmetry sets up the both ends bottom at the transport board.
Further, the cooling assembly comprises a cooling box, a movable screen plate, four driving motors and four driving screw rods, the cooling box is arranged beside the carrying seat, a feed inlet is formed in the top of the cooling box, the four driving motors are arranged on the top of the cooling box in a rectangular shape, the output ends of the four driving motors are vertically arranged downwards, the four driving screw rods are arranged in the cooling box in a rectangular shape, two ends of the four driving screw rods are respectively rotatably connected with the cooling box, the tops of the four driving screw rods are respectively fixedly connected with the output ends of the corresponding driving motors, the movable screen plate is horizontally arranged on the four driving screw rods and is in threaded connection with the four driving screw rods, a connecting pipe fixedly installed on the inner wall of the cooling box is arranged on the inner wall of the cooling box, a plurality of water outlet spray pipes are arranged on the connecting pipe, a circulating cooling pump is arranged beside the cooling box, and an input end of the circulating cooling pump is provided with a water inlet pipe extending into the cooling, the output end of the circulating cooling pump is provided with a water outlet pipe extending to the connecting pipe, and the cooling box is provided with a discharge door hinged with the cooling box.
Further, the shaping subassembly includes third mounting bracket, shaping punching machine and shaping piece, the third mounting bracket sets up between first mounting bracket and second mounting bracket, the setting of shaping punching machine is at the top of third mounting bracket and the vertical downward setting of output of shaping punching machine, the setting of shaping piece is on the output of shaping punching machine.
A bearing forging process comprises the following production processes:
s1: when the bearing is forged, the feeding conveying mechanism works to convey the forged iron blocks forwards, when the bearing moves to the output end of the feeding conveying mechanism, the output end of the material moving cylinder moves to drive the material moving plate to move the iron blocks on the feeding conveying mechanism to the forging moving platform through the sliding groove, at the moment, the fixed motor works to drive the fixed gear to rotate, the fixed gear rotates to drive the two fixed toothed plates to move away from or towards each other on the mounting plate, the two fixed toothed plates move to drive the two sliding columns to move on the forging moving platform, the two sliding columns move to drive the two semicircular fixed ring plates to move, and the iron blocks moving to the forging moving platform are fixed;
s2: after the iron block is fixed, the mobile motor works to drive the two chain wheels to rotate on the two mounting seats, the two chain wheels rotate to drive the chain to rotate so as to drive the connecting block to move, the connecting block moves to drive the forging mobile station to move on the two slide rails on the mobile frame, the forging mobile station moves to drive the iron block to move below the first mounting frame, the forging punch works to drive the forging round block to work to forge the iron block, after forging, the forging moving platform moves to the position below the third mounting rack, the forming punch works to drive the forming block to move, the forming block moves to perform forming operation on the iron block, after the forming, the forging moving platform moves to the position below the second mounting rack, the punching machine works to drive the punching head to move, the punching head moves to punch the iron blocks, after the forging is finished, the forged bearing is moved to the position below the carrying plate through the forging moving platform;
s3: the output end of the lifting cylinder moves to drive the carrying plate to move, the four-claw air clamp is moved to the position above the forging moving table, the bearing is clamped by the four-claw air clamp, after clamping, the rotating motor works to drive the rotating disc to rotate, so that the clamped bearing is moved to the position above the cooling box, and the bearing is moved into the cooling box through the feeding hole in the cooling box;
s4: after in moving the removal otter board of cooling incasement with the bearing, four driving motor work drive four drive lead screws at cooling incasement internal rotations, four drive lead screws rotate and drive the removal otter board and move on four drive lead screws, will remove the hypomere of bearing removal to cooling case on the otter board, the operation of cooling down is carried out to the bearing on the removal otter board, at the in-process of cooling down, circulation cooling pump work is extracted and is cooled down the water of inlet tube with the cooling down, carry water to the connecting pipe through the outlet pipe after the cooling down on, the connecting pipe is carried cold water to the bearing on the removal otter board through a plurality of outlet pipes, the operation of cooling down is carried out to the bearing, the bearing of accomplishing will forging through ejection of compact door after the cooling down is.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the forging moving platform moves to drive the iron block to move below the first mounting frame, the forging punching machine works to drive the forging round block to work to forge the iron block, the forging moving platform moves to the position below the second mounting frame after forging, the punching machine works to drive the punching head to move, the punching head moves to punch holes in the iron block, the forging moving platform moves the iron block to the position below the other first mounting frame after punching, the forging punching machine works to drive the forging round block to work to forge the iron block again, and the forged bearing moves to the position below the carrying plate through the forging moving platform after forging is completed.
Secondly, the fixed motor works to drive the fixed gear to rotate, the fixed gear rotates to drive the two fixed toothed plates to move away from or towards each other on the mounting plate, the two fixed toothed plates move to drive the two sliding columns to move on the forging moving platform, the two sliding columns move to drive the two semicircular fixed ring plates to move, an iron block moving to the forging moving platform is fixed, and the position of the bearing is prevented from being shifted and moved reversely when the bearing is forged, so that the accuracy of bearing forging is influenced.
Thirdly, the output end of the lifting cylinder moves to drive the carrying plate to move, the four-claw air clamp moves to the position above the forging moving table, the four-claw air clamp clamps the bearing, the rotating motor works to drive the rotating disc to rotate after clamping, so that the clamped bearing moves to the position above the cooling box, the bearing moves into the cooling box through the feeding hole in the cooling box, the unloading operation of the forged bearing can be realized, the forged bearing moves into the cooling box, and the automatic carrying is realized, so that the working efficiency is improved.
Fourthly, after the bearings are moved into the movable screen plate in the cooling box, the four driving motors work to drive the four driving screw rods to rotate in the cooling box, the four driving screw rods rotate to drive the movable screen plate to move on the four driving screw rods, the bearings on the movable screen plate are moved to the lower section of the cooling box, the bearings on the movable screen plate are cooled, in the cooling process, the circulating cooling pump works to extract and cool water cooled by the water inlet pipe, the water is conveyed to the connecting pipe through the water outlet pipe after being cooled, the connecting pipe conveys cold water to the bearings on the movable screen plate through the water outlet pipes, the bearings are cooled, the forged bearings are taken out through the discharging door after being cooled, automatic cooling operation of the bearings is achieved, and working efficiency is improved.
Drawings
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a partial perspective view of the present invention;
FIG. 4 is a perspective view of the fixing assembly of the present invention;
FIG. 5 is a perspective view of the handling assembly of the present invention;
FIG. 6 is a first schematic perspective view of a cooling assembly according to the present invention;
fig. 7 is a schematic perspective view of a cooling assembly according to the present invention.
The reference numbers in the figures are:
the
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1 to 7, the invention provides a bearing forging production line and a bearing forging production process, which comprises a
Specifically, the moving
Specifically, the
Specifically, the
Specifically, the punching assembly 4 comprises a second mounting frame 41, a punching machine 42 and a punching head 43, wherein the second mounting frame 41 is vertically arranged at the side of the first mounting frame 71, the punching machine 42 is arranged at the top of the second mounting frame 41, the output end of the punching machine 42 is vertically arranged downwards, and the punching head 43 is arranged at the output end of the punching machine 42; the second mounting frame 41 is used for mounting the punching machine 42, the punching machine 42 operates to drive the punching head 43 to move, and the punching head 43 moves to perform punching operation on the iron block and perform punching operation on the iron block.
Specifically, the
Specifically, the
Specifically, the forming
A bearing forging process comprises the following production processes:
s1: when a bearing is forged, the
s2: after the iron block is fixed, the moving motor 22 works to drive the two chain wheels 27 to rotate on the two mounting seats 26, the two chain wheels 27 rotate to drive the chain 25 to rotate so as to drive the connecting block 24 to move, the connecting block 24 moves to drive the forging moving platform 23 to move on the two slide rails 28 on the moving frame 21, the forging moving platform 23 moves to drive the iron block to move below the first mounting frame 71, the forging punch 72 works to drive the forging round block 73 to work so as to forge the iron block, after forging, the forging moving table 23 moves to the lower part of the third mounting rack 81, the forming punch 82 works to drive the forming block 83 to move, the forming block 83 moves to perform forming operation on the iron block, after the forming, the forging moving table 23 moves to the lower part of the second mounting frame 41, the punching head 43 is driven by the operation of the punching machine 42, the punching head 43 moves to perform the punching operation on the iron block, after the forging is completed, the forged bearing is moved to the lower side of the carrier plate 55 by the forging moving table 23;
s3: the output end of the lifting
s4: after the bearing is moved into the
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
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