CN114986976B - Stamping equipment opens and stops auxiliary system - Google Patents

Abstract

The application discloses a stamping equipment start-stop auxiliary system, which comprises a first clutch, a second clutch, a gear transmission assembly and a brake assembly, wherein the first clutch is connected with the second clutch; the first clutch is arranged on the crank shaft, the gear transmission assembly is arranged on the rack, and the second clutch is arranged at the input end of the gear transmission assembly; the brake assembly comprises a cylinder body, a piston, a connecting rod and a rack; the piston is axially slidably arranged in the cylinder body and is used for partitioning the interior of the cylinder body to form a first cavity and a second cavity, and gas is filled in the first cavity; one end of the connecting rod is arranged on the piston, the other end of the connecting rod is arranged at one end of the rack, and the rack is meshed with the output end of the gear transmission assembly; when the stamping equipment stops working, the first clutch is separated from the flywheel, the second clutch is combined with the flywheel, and the flywheel can drive the piston to compress gas in the first cavity sequentially through the gear transmission assembly, the rack and the connecting rod, so that the flywheel is braked. The brake effect is good, and the safety is high.

Description

Stamping equipment opens and stops auxiliary system

Technical Field

The application relates to the technical field of stamping equipment, in particular to a stamping equipment start-stop auxiliary system.

Background

At present, the existing stamping equipment generally comprises a frame, a driving mechanism, a flywheel, a crank shaft, a connecting rod, a slide block, an upper die frame and a lower die frame. When the crankshaft and the crankshaft rotate, the connecting rod drives the sliding block to slide up and down. The upper die frame is arranged at the lower end of the sliding block, and the lower end of the upper die frame is used for mounting upper dies of different models; the lower die frame is arranged under the upper die frame, and the upper end of the lower die frame is used for installing lower dies of different models. When the blank moves between the lower die and the upper die moves downwards along with the upper die frame (namely the sliding block), the blank can be punched. When the machine stops working, the clutch is disconnected to cut off power transmission between the flywheel and the crankshaft, and the crankshaft is braked through the brake to limit the upper die, the upper die frame and the sliding block to move.

However, the existing punching equipment still has the following defects: (1) When the punching equipment stops working, the flywheel still continues to rotate, a mechanism for effectively braking the flywheel is lacked, and certain potential safety hazards exist. (2) At the moment of starting the stamping equipment, the driving mechanism needs to drive the static flywheel to rotate, and at the moment, the instantaneous load of the driving mechanism is large, so that the service life of the driving mechanism is easily shortened, and the voltage of a power distribution system is easily unstable, so that the normal operation of other equipment is influenced.

Disclosure of Invention

An object of this application is to provide a stamping equipment that braking effect is good, and security is high opens and stops auxiliary system.

Another object of the present application is to provide a starting and stopping auxiliary system for a punching device, which has low energy consumption and can reduce the instant load of the starting of a driving mechanism.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: a starting and stopping auxiliary system of stamping equipment comprises a first clutch, a second clutch, a gear transmission assembly and a brake assembly; the first clutch is arranged on the crankshaft and is used for realizing power input between a flywheel and the crankshaft; the gear transmission assembly is arranged on the rack, the second clutch is arranged at the input end of the gear transmission assembly, and the second clutch is used for realizing power input between the flywheel and the gear transmission assembly; the brake assembly comprises a cylinder body, a piston, a connecting rod and a rack; the piston is axially slidably arranged in the cylinder body, the piston is used for partitioning the interior of the cylinder body to form a first chamber and a second chamber, and the first chamber is filled with gas; one end of the connecting rod is arranged on the piston, the other end of the connecting rod is arranged on one end of the rack, and the rack is meshed with the output end of the gear transmission assembly; when the stamping equipment stops working, the first clutch is separated from the flywheel, the second clutch is combined with the flywheel, and the flywheel can drive the piston to compress the gas in the first cavity sequentially through the gear transmission assembly, the rack and the connecting rod, so that the flywheel is braked.

Preferably, the starting and stopping auxiliary system of the stamping equipment further comprises a starting assembly, wherein the starting assembly comprises an air storage tank, a first pipeline, a second pipeline, a first control valve, a second control valve, a one-way valve and an elastic resetting piece; two ends of the first pipeline are respectively communicated with the gas storage tank and the first cavity, and two ends of the second pipeline are respectively communicated with the gas storage tank and the second cavity; the first control valve and the one-way valve are arranged in the first pipeline in parallel, the one-way valve is used for limiting the gas in the gas storage tank to enter the first chamber through the one-way valve, and the second control valve is arranged in the second pipeline; the elastic reset piece is arranged in the first cavity; when the piston compresses the gas in the first chamber, the first control valve and the second control valve are closed, so that the gas in the first chamber enters the gas storage tank through the one-way valve; when the flywheel stops rotating, the second clutch is separated from the flywheel, and the air pressure in the first cavity and the elastic resetting piece force the piston to slide towards the direction of the second cavity; when the stamping equipment is started, the second clutch is combined with the flywheel, the second control valve is opened, so that gas in the gas storage tank enters the second chamber through the second pipeline and forces the piston to slide towards the first chamber, and the piston can drive the flywheel to rotate sequentially through the connecting rod, the rack and the gear transmission assembly; when the flywheel rotates, the second clutch is separated from the flywheel, the first control valve is opened, so that the air pressure in the first cavity and the air pressure in the second cavity are equal, and the elastic resetting piece can force the piston to slide towards the direction of the second cavity.

Preferably, the gear transmission assembly comprises a mounting frame, an inner gear ring, an outer gear ring and at least three planet gears; the mounting frame is arranged on the rack, the outer gear ring is rotatably arranged on the rack, and the outer gear ring is coaxially connected with the second clutch; each of the planet gears is rotatably arranged on the mounting bracket, and each of the planet gears is meshed with the outer gear ring at equal intervals along the circumferential direction of the outer gear ring; the inner gear ring is coaxially arranged on the outer side of the outer gear ring, the inner gear ring is meshed with each planetary gear, and a tooth groove used for meshing the rack is formed in the outer annular surface of the inner gear ring.

Preferably, the brake assembly further comprises a limiting sliding groove, the limiting sliding groove is arranged on the rack, and the rack is connected to the limiting sliding groove in a sliding manner along the sliding direction of the piston; a notch is formed in the position, corresponding to the inner gear ring, of the limiting sliding groove, the tooth socket on the inner gear ring is meshed with the rack through the notch, and the limiting sliding groove is used for limiting the axial movement of the inner gear ring.

Preferably, the number of the braking assemblies is two, and the racks on the two braking assemblies are oppositely arranged on two sides of the inner gear ring.

Preferably, the first clutch comprises a first fixed disc, a pushing disc, a first guide pillar, a first friction plate, a second friction plate and a telescopic piece; the first fixed disc is coaxially arranged on the crankshaft, a positioning hole axially penetrates through the first fixed disc, and the pushing disc is axially slidably arranged on the crankshaft; the first guide pillar is axially slidably arranged in the positioning hole, one end, far away from the flywheel, of the first guide pillar is arranged on the pushing disc, and a first mounting part is arranged at one end, close to the flywheel, of the first guide pillar; the first friction plate is arranged on the first installation part, and the second friction plate is arranged on one side, close to the first friction plate, of the flywheel; the extensible member set up in the frame, the flexible end of extensible member coaxial and rotationally set up in the driving disk.

Preferably, the second clutch comprises a second fixed disc, a second guide pillar, a third friction plate and an elastic piece; the second fixed disc is coaxially arranged on one side, far away from the flywheel, of the pushing disc, and the second fixed disc is coaxially arranged at the input end of the gear transmission assembly; a first accommodating cavity, a second accommodating cavity and a channel are formed in the second fixing disc, and one end, far away from the flywheel, in the first accommodating cavity is communicated with one end, far away from the flywheel, in the second accommodating cavity through the channel; a first through hole is formed in the first accommodating cavity in a penetrating manner at one end close to the flywheel, and a second through hole is formed in the second accommodating cavity in a penetrating manner at one end close to the flywheel; the second guide pillar is axially slidably arranged in the first through hole, one end, close to the flywheel, of the second guide pillar is provided with a second mounting part for mounting the third friction plate, one end, far away from the flywheel, of the second guide pillar is provided with a first limiting part, and the first limiting part is axially slidably arranged in the first accommodating cavity; the third guide pillar is axially slidably arranged in the second through hole, one end, far away from the flywheel, of the third guide pillar is provided with a second limiting part, and the second limiting part is axially slidably arranged in the second accommodating cavity; a closed oil storage cavity for filling hydraulic oil is formed among the first limiting part, the second limiting part, the first accommodating cavity and the second accommodating cavity; the elastic piece is arranged in the first accommodating cavity and used for forcing the first limiting part to slide towards the direction far away from the flywheel, and the hydraulic oil in the oil storage cavity can push the second limiting part to slide towards the direction close to the flywheel; when the telescopic piece is shortened, the pushing disc and the first guide post slide towards the direction far away from the flywheel until the first friction plate is separated from the second friction plate, one side of the pushing disc far away from the flywheel forces the third guide post to slide towards the direction far away from the flywheel, and hydraulic oil in the oil storage cavity can push the first limiting part to slide towards the direction close to the flywheel until the third friction plate is combined with the second friction plate.

Preferably, a circular groove is coaxially formed in the pushing disc corresponding to the third guide post, a spherical structure is arranged at one end, close to the flywheel, of the third guide post, and the spherical structure is connected to the circular groove in a sliding mode along the circumferential direction of the crankshaft.

Preferably, the telescopic part comprises a shell, a thrust cover, a thrust block, a movable rod and two thrust bearings; the thrust cover is coaxially arranged at one end, far away from the flywheel, of the thrust disc, and a first protruding part used for positioning one end of one thrust bearing is arranged at one end, far away from the thrust disc, of the thrust cover; one end of the shell is provided with a abdicating hole, and the other end of the shell is of an open structure; the open structure of the shell is arranged at one end, far away from the flywheel, of the thrust cover, and a positioning groove for positioning one end of the other thrust bearing is formed at one end, close to the abdicating hole, in the shell; the thrust block is coaxially arranged between the two thrust bearings, and two sides of the thrust block are coaxially provided with second protruding parts used for positioning the other ends of the corresponding thrust bearings; the movable rod with the flywheel is coaxial to be arranged, movable rod one end is passed through the hole of stepping down runs through to behind the shell again coaxial set up in the thrust block, but the movable rod other end axial sliding set up in the frame.

Preferably, the number of the first guide pillars and the number of the second guide pillars are at least two, the first mounting parts on the first guide pillars are sequentially connected to form an annular structure, and the second mounting parts on the second guide pillars are sequentially connected to form an annular structure; the first installation part, the second installation part and the flywheel are in coaxial arrangement.

Compared with the prior art, the beneficial effect of this application lies in: (1) When the stamping equipment is normally started, the first clutch and the second clutch are controlled to be simultaneously separated from the flywheel, so that the driving mechanism drives the flywheel to rotate; when the flywheel has a certain rotating speed, the first clutch is controlled to be combined with the flywheel, so that the power on the flywheel is transmitted to the crank shaft through the first clutch, and the punching operation of a punching device is carried out; when stamping equipment stop work (actuating mechanism stop work promptly), control first clutch with the flywheel separation, in order to cut off the flywheel with power transmission between the crankshaft, so that brake the crankshaft through the stopper, and control the second clutch with the flywheel combines, the flywheel can be passed through because of having a residual partly power of inertia the second clutch input to gear drive assembly's input, gear drive assembly's output can drive the rack moves, the rack passes through again the connecting rod drive the piston compression gas in the first chamber, promptly through with the kinetic energy transformation of flywheel becomes gaseous internal energy in the first chamber, thereby can be effectively right the flywheel brakes, and the security is higher.

(2) Under the cooperation starting assembly's effect, it is right the flywheel is braked (promptly the piston compression during gas in the first chamber), closes first control valve and the second control valve, in order to with gas in the first chamber passes through first pipeline and the check valve is impressed in the gas holder, this process can with partly kinetic energy on the flywheel converts gaseous internal energy into and stores, and this in-process the check valve can prevent gas in the gas holder flow back extremely in the first chamber. When the flywheel stops rotating (namely the rotating speed of the flywheel is equal to zero or approaches to zero) is detected, the second clutch is immediately controlled to be separated from the flywheel, at the moment, the input end of the gear transmission assembly approaches to no load, the air pressure of residual gas in the first chamber and the elastic resetting piece can easily drive the piston to slide towards the direction of the second chamber, and therefore the rack is automatically reset. When stamping equipment restarts, the second clutch with the flywheel combines, the second control valve is opened, gas in the gas holder can pass through the second pipeline gets into the second chamber, in order to force the piston to the direction slip of first chamber, the piston can loop through the connecting rod the rack gear drive subassembly and second clutch drive flywheel rotates, thereby makes the flywheel obtains certain initial velocity, and this process can be with the internal energy that stores before in gas reconvert into the kinetic energy of flywheel, and then can reduce actuating mechanism's start-up load. When the flywheel obtains a certain initial speed, immediately controlling the second clutch to be separated from the flywheel so as to completely drive the flywheel through a driving mechanism and open the first control valve, wherein at the moment, the first cavity and the second cavity are simultaneously communicated with the air storage tank, namely the air pressure in the first cavity is equal to the air pressure in the second cavity, and the elastic resetting piece can force the piston to slide towards the direction of the second cavity so as to enable the rack to automatically reset again; and after the rack is reset again, closing the first control valve and the second control valve, and filling a large amount of gas in the first chamber to prepare for the next braking. That is, when the flywheel is braked by the brake assembly, a part of kinetic energy on the flywheel can be collected and rotated into internal energy of gas for storage; through the start-up subassembly can be when stamping equipment restarts, can reconvert the internal energy of storing in gas into the kinetic energy of flywheel to reduce actuating mechanism's start-up load, both be favorable to reducing actuating mechanism's energy consumption, be favorable to prolonging actuating mechanism's life again, the voltage that still is favorable to distribution system is more stable.

Drawings

Fig. 1 is an installation schematic diagram of a start-stop auxiliary system of a stamping apparatus provided by the present application.

Fig. 2 is an enlarged view of a portion of the structure in fig. 1 provided herein.

Fig. 3 is an exploded view of the structures of fig. 2 provided in the present application.

Fig. 4 is an enlarged view of a portion of the structure of fig. 3 provided herein.

FIG. 5 is an enlarged view of the brake assembly of FIG. 3 provided herein.

Fig. 6 is an enlarged view of a portion of the structure in fig. 3 provided herein.

Fig. 7 is an enlarged view of the structures in fig. 6 provided in the present application.

Fig. 8 is an exploded view of the gear assembly of fig. 7 as provided by the present application.

Fig. 9 is an exploded view of a portion of the structure of the first clutch of fig. 7 provided herein.

Fig. 10 is an exploded view of the telescoping member of fig. 7 as provided herein.

Fig. 11 is an exploded view of the second clutch of fig. 7 as provided by the present application.

Fig. 12 is an enlarged view of a portion of the structure of fig. 11 provided herein.

Fig. 13 is a cross-sectional view of the structures of fig. 2 provided herein.

Fig. 14 is an enlarged view of a portion of the structure of fig. 13 provided herein.

Fig. 15 is a partial enlarged view at I of fig. 14 provided herein.

Fig. 16 is a partial enlarged view of fig. 14 at II provided herein.

FIG. 17 isbase:Sub>A cross-sectional view taken along A-A of FIG. 13 and illustrates an operational schematic of the activation assembly as provided herein.

In the figure: 1. a first clutch; 11. a first fixed disk; 111. positioning holes; 12. pushing the disc; 121. an annular groove; 13. a first guide post; 131. a first mounting portion; 14. a first friction plate; 15. a second friction plate; 16. a telescoping member; 161. a housing; 1611. a hole of abdication; 1612. positioning a groove; 162. a thrust cover; 1621. a first projecting portion; 163. a thrust block; 1631. a second projection; 164. a movable rod; 165. a thrust bearing; 2. a second clutch; 21. a second fixed disk; 211. a first accommodating chamber; 212. a first through hole; 213. a second accommodating chamber; 214. a second through hole; 215. a channel; 22. a second guide post; 221. a second mounting portion; 222. a first limiting part; 23. a third guide post; 231. a second limiting part; 232. a spherical structure; 24. a third friction plate; 25. an elastic member; 3. a gear drive assembly; 31. a mounting frame; 32. an inner gear ring; 321. a tooth socket; 33. an outer ring gear; 34. a planetary gear; 4. a brake assembly; 41. a cylinder body; 411. a first chamber; 412. a second chamber; 42. a piston; 43. a connecting rod; 44. a rack; 45. a limiting chute; 451. a notch; 5. starting the component; 51. a gas storage tank; 52. a first pipe; 53. a second pipe; 54. a first control valve; 55. a second control valve; 56. a one-way valve; 57. an elastic reset member; 100. a frame; 200. a crank shaft; 300. a flywheel; 400. a drive mechanism.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application. The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 7, an embodiment of the present application provides a punching device start-stop auxiliary system, including a first clutch 1, a second clutch 2, a gear transmission assembly 3, and a brake assembly 4; the first clutch 1 is disposed on the crankshaft 200, and the first clutch 1 is used for realizing power input between the flywheel 300 and the crankshaft 200; the gear transmission assembly 3 is disposed on the frame 100, the second clutch 2 is disposed at an input end of the gear transmission assembly 3, and the second clutch 2 is used for realizing power input between the flywheel 300 and the gear transmission assembly 3. The brake assembly 4 comprises a cylinder 41, a piston 42, a connecting rod 43 and a rack 44; the piston 42 is axially slidably disposed inside the cylinder 41, the piston 42 is used for partitioning the inside of the cylinder 41 into a first chamber 411 and a second chamber 412, and the first chamber 411 is filled with gas; one end of the connecting rod 43 is arranged on the piston 42, the other end of the connecting rod 43 is arranged on one end of the rack 44, and the rack 44 is meshed with the output end of the gear transmission component 3; when the punching device stops working, the first clutch 1 is separated from the flywheel 300, and the second clutch 2 is combined with the flywheel 300, so that the flywheel 300 can drive the piston 42 to compress the gas in the first chamber 411 sequentially through the gear transmission assembly 3, the rack 44 and the connecting rod 43, thereby braking the flywheel 300. It should be noted that, for the sake of description, the input end of the gear transmission assembly 3 is defined by taking the flywheel 300 as the power, and correspondingly, the output end of the gear transmission assembly 3 is meshed with the rack 44, but this does not mean that the end of the gear transmission assembly 3 connected with the flywheel 300 can only be taken as the power input end, for example, after the starting assembly 5 is disposed, the rack 44 can also drive the gear transmission assembly 3 in reverse, thereby achieving the purpose of driving the flywheel 300 to rotate. In addition, the gear ratio of the gear transmission assembly 3 is not limited in the present application, and may be greater than 1, or equal to or less than 1.

The stamping equipment start-stop auxiliary system is in operation: when the punching equipment is normally started, the first clutch 1 and the second clutch 2 are controlled to be simultaneously separated from the flywheel 300, so that the driving mechanism 400 drives the flywheel 300 to rotate; when the flywheel 300 has a certain rotation speed, the first clutch 1 is controlled to be coupled with the flywheel 300, so that the power on the flywheel 300 is transmitted to the crankshaft 200 through the first clutch 1 for the punching operation of the punching device. When the punching device stops working (i.e. the driving mechanism 400 stops working), the first clutch 1 is controlled to be separated from the flywheel 300 to cut off power transmission between the flywheel 300 and the crankshaft 200, so as to brake the crankshaft 200 through the brake, and the second clutch 2 is controlled to be combined with the flywheel 300, a part of power left by the flywheel 300 due to rotational inertia can be input to the input end of the gear transmission assembly 3 through the second clutch 2, the output end of the gear transmission assembly 3 drives the rack 44 to do linear motion, the rack 44 drives the piston 42 to slide towards the first chamber 411 through the connecting rod 43, so as to compress the gas in the first chamber 411, i.e. the kinetic energy of the flywheel 300 is converted into the internal energy of the gas in the first chamber 411, so as to brake the flywheel 300, and improve the safety of the punching device. It should be noted that, as will be understood by those skilled in the art, the gas filled in the first chamber 411 needs to have a suitable pressure in order to effectively brake the flywheel 300 while avoiding the piston 42 from hitting the inner wall of the cylinder 41; of course, it is also possible to detect the movement position of the piston 42 or the connecting rod 43 or the rack 44 or the gear assembly 3 with the aid of a distance detection sensor, so as to control the second clutch 2 to be separated from the flywheel 300 in time when the piston 42 is about to strike against the inner wall of the cylinder 41; under the action of the compressed gas in the first chamber 411, the piston 42 is forced to slide towards the second chamber 412, after the piston 42 stops moving, the second clutch 2 is controlled to be combined with the flywheel 300 again, so that the flywheel 300 is continuously braked, and after the flywheel 300 is completely static, the second clutch 2 is controlled to be separated from the flywheel 300.

Referring to fig. 17, in some embodiments of the present application, the start-stop assist system of the stamping apparatus further includes an activation assembly 5, where the activation assembly 5 includes an air tank 51, a first pipe 52, a second pipe 53, a first control valve 54, a second control valve 55, a check valve 56, and an elastic reset 57; two ends of the first pipeline 52 are respectively communicated with the air storage tank 51 and the first chamber 411, and two ends of the second pipeline 53 are respectively communicated with the air storage tank 51 and the second chamber 412; a first control valve 54 and a check valve 56 are arranged in parallel in the first pipeline 52, the check valve 56 is used for limiting the gas in the gas storage tank 51 to enter the first chamber 411 through the check valve 56, and a second control valve 55 is arranged in the second pipeline 53; the elastic restoring member 57 is disposed in the first chamber 411; when the piston 42 compresses the gas in the first chamber 411, the first control valve 54 and the second control valve 55 are closed, so that the gas in the first chamber 411 enters the gas storage tank 51 through the one-way valve 56; when the flywheel 300 stops rotating, the second clutch 2 is separated from the flywheel 300, and the air pressure in the first chamber 411 and the elastic resetting piece 57 force the piston 42 to slide towards the second chamber 412; when the punching device is started, the second clutch 2 is combined with the flywheel 300, the second control valve 55 is opened, so that the gas in the gas storage tank 51 enters the second chamber 412 through the second pipeline 53, and the piston 42 is forced to slide towards the first chamber 411, and the piston 42 can drive the flywheel 300 to rotate sequentially through the connecting rod 43, the rack 44 and the gear transmission assembly 3; when the flywheel 300 rotates, the second clutch 2 is disengaged from the flywheel 300, the first control valve 54 is opened, so that the air pressures in the first chamber 411 and the second chamber 412 are equal, and the elastic restoring member 57 forces the piston 42 to slide toward the second chamber 412.

As shown in fig. 17, when the flywheel 300 is braked (i.e., the piston 42 compresses the gas in the first chamber 411) by the starting assembly 5, the first control valve 54 and the second control valve 55 are closed to press the gas in the first chamber 411 into the gas storage tank 51 through the first pipe 52 and the check valve 56, a part of the kinetic energy of the flywheel 300 can be converted into the internal energy of the gas and stored, and the check valve 56 can prevent the gas in the gas storage tank 51 from flowing back into the first chamber 411 during the process. When the flywheel 300 stops rotating (i.e. the rotation speed of the flywheel 300 is equal to or approaches zero), the second clutch 2 is immediately controlled to be disengaged from the flywheel 300, and at this time, the input end of the gear transmission assembly 3 approaches no load, the gas pressure of the residual gas in the first chamber 411 and the elastic resetting member 57 easily drive the piston 42 to slide towards the second chamber 412, so that the rack 44 is automatically reset. When the punching device is started again, the second clutch 2 is combined with the flywheel 300, the second control valve 55 is opened, the gas in the gas storage tank 51 enters the second chamber 412 through the second pipeline 53 to force the piston 42 to slide towards the first chamber 411, the piston 42 sequentially passes through the connecting rod 43, the rack 44, the gear transmission assembly 3 and the second clutch 2 to drive the flywheel 300 to rotate, so that the flywheel 300 obtains a certain initial speed (the rotation direction of the flywheel 300 is the same as that of the punching device during normal starting), the process can convert the internal energy stored in the gas into the kinetic energy of the flywheel 300 again, and further the starting load of the driving mechanism 400 can be reduced. When the flywheel 300 obtains a certain initial speed, immediately controlling the second clutch 2 to be separated from the flywheel 300 so as to completely drive the flywheel 300 through the driving mechanism 400, and opening the first control valve 54, at this time, the first chamber 411 and the second chamber 412 are simultaneously communicated with the air storage tank 51, that is, the air pressure in the first chamber 411 is equal to the air pressure in the second chamber 412, and the elastic resetting piece 57 is capable of forcing the piston 42 to slide towards the second chamber 412, so that the rack 44 is automatically reset again; after the rack 44 is reset again, the first control valve 54 and the second control valve 55 are closed, and the first chamber 411 is filled with a large amount of gas to prepare for the next braking. That is, while the flywheel 300 is braked by the brake assembly 4, a part of kinetic energy on the flywheel 300 can be collected and rotated into internal energy of gas for storage; when the stamping device is restarted, the starting assembly 5 can convert the internal energy stored in the gas into the kinetic energy of the flywheel 300 again, so that the starting load of the driving mechanism 400 is reduced, the reduction of the energy consumption of the driving mechanism 400 is facilitated, the service life of the driving mechanism 400 is prolonged, and the voltage of a power distribution system is more stable.

In order to ensure the stability of the start-stop auxiliary system of the stamping equipment, the air storage tank 51 is further provided with an air pressure detection device, an air pressure supplement device and a pressure relief device (the air pressure detection device, the air pressure supplement device and the pressure relief device are all in the prior art), so that the air pressure in the air storage tank 51 is detected in real time through the air pressure detection device, and when the air pressure in the air storage tank 51 is smaller than a standard range, the air storage tank 51 is supplemented with air through the air pressure supplement device in time; when the air pressure in the air storage tank 51 is larger than the standard range, the pressure is released in time through the pressure release device, so that the relative constancy of the air pressure in the air storage tank 51 can be maintained.

Referring to fig. 6, 7 and 8, in some embodiments of the present application, the gear assembly 3 includes a mounting bracket 31, an inner ring gear 32, an outer ring gear 33 and at least three planet gears 34; the mounting frame 31 is arranged on the rack 100, the outer gear ring 33 is rotatably arranged on the rack 100, and the outer gear ring 33 is coaxially connected with the second clutch 2; each of the pinion gears 34 is rotatably provided to the mounting frame 31, and each of the pinion gears 34 meshes with the outer ring gear 33 at equal intervals in the circumferential direction of the outer ring gear 33; the inner gear 32 is coaxially disposed outside the outer gear 33, the inner gear 32 is engaged with each of the planetary gears 34, and the outer circumferential surface of the inner gear 32 is provided with a tooth groove 321 for engaging the rack 44. As shown in fig. 17, when braking is performed, the flywheel 300 drives the outer ring gear 33 to rotate through the second clutch 2, and the outer ring gear 33 drives the inner ring gear 32 to rotate through the planet gears 34, so that the piston 42 is driven to slide in the direction of the first chamber 411 through the rack 44 and the connecting rod 43; at start-up, the air pressure in the second chamber 412 forces the piston 42 to slide in the direction of the first chamber 411, which in turn drives the flywheel 300 to rotate. The gear ratio of the layout mode of the gear transmission assembly 3 is greater than 1, namely, the speed reduction function can be realized, so that the stroke of the piston 42 during braking can be shortened; in other words, a smaller distance of piston 42 sliding during start-up also allows a larger angle of flywheel 300 rotation. Meanwhile, the layout mode is more compact and reasonable, so that the whole volume of the stamping equipment is favorably reduced.

Referring to fig. 2, 3 and 4, in some embodiments of the present application, the braking assembly 4 further includes a limiting sliding groove 45, the limiting sliding groove 45 is disposed on the frame 100, and the rack 44 is slidably connected to the limiting sliding groove 45 along the sliding direction of the piston 42; a notch 451 is arranged on the position of the limit chute 45 corresponding to the inner gear ring 32, the tooth socket 321 on the inner gear ring 32 is meshed with the rack 44 through the notch 451, and the limit chute 45 is used for limiting the axial movement of the inner gear ring 32. On one hand, the rack 44 can be limited through the limiting sliding groove 45, so that the rack 44 can only do linear motion, and the motion precision is higher; on the other hand, the limiting sliding groove 45 also axially limits the inner gear ring 32, so that a structure for axially limiting the inner gear ring 32 is omitted. In addition, because the inner gear ring 32 does not bear an axial load, even if the inner gear ring 32 is not axially limited, the normal operation of the inner gear ring 32 can be theoretically ensured, but the inner gear ring may fall off when being vibrated in the movement process; after the inner gear ring 32 is axially limited by the limiting sliding groove 45, the inner gear ring 32 can be completely prevented from falling off.

Referring to fig. 2, 3 and 4, in some embodiments of the present application, the number of the braking assemblies 4 is two, and the racks 44 on the two braking assemblies 4 are oppositely disposed on both sides of the ring gear 32. The two oppositely arranged brake assemblies 4 can better brake the flywheel 300 and assist the flywheel 300 to start; meanwhile, the two limiting chutes 45 are just symmetrical to two sides of the inner gear ring 32, so that the inner gear ring 32 can be better axially limited.

Referring to fig. 7, 9 and 10, in some embodiments of the present application, the first clutch 1 includes a first fixed disk 11, a push disk 12, a first guide post 13, a first friction plate 14, a second friction plate 15 and a telescopic member 16; the first fixed disk 11 is coaxially disposed at the crank shaft 200 such that the first fixed disk 11 rotates simultaneously with the crank shaft 200; the first fixing plate 11 is axially provided with a positioning hole 111. The push plate 12 is axially slidably provided to the crank shaft 200; the first guide post 13 is axially slidably disposed in the positioning hole 111, one end of the first guide post 13 away from the flywheel 300 is disposed on the pushing plate 12, and one end of the first guide post 13 close to the flywheel 300 is disposed with a first mounting portion 131; the first friction plate 14 is arranged on the first mounting portion 131, and the second friction plate 15 is arranged on one side (shown in fig. 3) of the flywheel 300 close to the first friction plate 14; the telescopic member 16 is disposed on the frame 100, and a telescopic end of the telescopic member 16 is coaxially and rotatably disposed on the pushing plate 12. As shown in fig. 13, 14, 15 and 16, the expansion element 16 is extended to drive the pushing plate 12 in the direction of the flywheel 300, and the pushing plate 12 pushes the first guiding post 13 to move in the direction of the flywheel 300, so that the first friction plate 14 contacts with the second friction plate 15, and the power input between the flywheel 300 and the first fixed disk 11 (i.e. the crankshaft 200) is realized; due to the cooperation of the first guide post 13 and the positioning hole 111, the pushing plate 12 will rotate along with the first fixing plate 11, and the telescopic end of the telescopic member 16 and the pushing plate 12 can rotate, so that no interference is generated; similarly, when the expansion element 16 is shortened, the driving plate 12 is pulled away from the flywheel 300, so that the first friction plate 14 and the second friction plate 15 can be separated to cut off the power input between the flywheel 300 and the crankshaft 200.

Referring to fig. 6, 7, 11 and 12, in some embodiments of the present application, the second clutch 2 includes a second fixed disk 21, a second guide post 22, a third guide post 23, a third friction plate 24 and an elastic member 25; the second fixed disk 21 is coaxially arranged on one side of the push disk 12, which is far away from the flywheel 300, and the second fixed disk 21 is coaxially arranged at the input end of the gear transmission component 3; a first accommodating cavity 211, a second accommodating cavity 213 and a channel 215 are arranged in the second fixing disc 21, and one end of the first accommodating cavity 211, which is far away from the flywheel 300, is communicated with one end of the second accommodating cavity 213, which is far away from the flywheel 300, through the channel 215; a first through hole 212 is arranged in the first accommodating cavity 211 in a penetrating manner at one end close to the flywheel 300, and a second through hole 214 is arranged in the second accommodating cavity 213 in a penetrating manner at one end close to the flywheel 300; the second guide post 22 is axially slidably disposed in the first through hole 212, a second mounting portion 221 for mounting the third friction plate 24 is disposed at an end of the second guide post 22 close to the flywheel 300, a first limiting portion 222 is disposed at an end of the second guide post 22 far from the flywheel 300, and the first limiting portion 222 is axially slidably disposed in the first accommodating cavity 211; the third guide post 23 is axially slidably disposed in the second through hole 214, a second limiting portion 231 is disposed at an end of the third guide post 23 away from the flywheel 300, and the second limiting portion 231 is axially slidably disposed in the second accommodating cavity 213; a closed oil storage cavity for filling hydraulic oil is formed among the first limiting part 222, the second limiting part 231, the first accommodating cavity 211 and the second accommodating cavity 213; the elastic element 25 is disposed in the first accommodating cavity 211, and the elastic element 25 is used for forcing the first position-limiting portion 222 to slide in a direction away from the flywheel 300, so that the hydraulic oil in the oil storage cavity can push the second position-limiting portion 231 to slide in a direction close to the flywheel 300; when the telescopic member 16 is shortened, the pushing plate 12 and the first guide post 13 slide in a direction away from the flywheel 300 until the first friction plate 14 is separated from the second friction plate 15, and then one side of the pushing plate 12 away from the flywheel 300 forces the third guide post 23 to slide in a direction away from the flywheel 300, so that the hydraulic oil in the oil storage cavity can push the first limiting portion 222 to slide in a direction close to the flywheel 300 until the third friction plate 24 is combined with the second friction plate 15. As shown in fig. 14, 15 and 16, when the first friction plate 14 is combined with the second friction plate 15, the distance between the pushing plate 12 and the second fixing plate 21 is large, so that the pushing plate does not contact the third guide post 23, at this time, under the action of the elastic member 25, the first limiting portion 222 slides in the direction away from the flywheel 300, so that the second limiting portion 231 is pushed by the hydraulic oil in the oil storage cavity to slide in the direction close to the flywheel 300, and the first limiting portion 222 drives the second guide post 22 to slide in the direction away from the flywheel 300, so that the third friction plate 24 is separated from the second friction plate 15. When the telescopic member 16 drives the push disc 12 to slide in a direction away from the flywheel 300, so that the first friction plate 14 is separated from the second friction plate 15, one side of the push disc 12 away from the flywheel 300 pushes the third guide post 23 (i.e., the second limiting portion 231) to slide in a direction away from the flywheel 300, and thus the hydraulic oil in the oil storage cavity pushes the first limiting portion 222 (i.e., the second guide post 22) to slide in a direction close to the flywheel 300, so that the third friction plate 24 moves to contact with the second friction plate 15, and power transmission between the flywheel 300 and the second fixed disc 21 is realized. That is, only one control system is needed to drive the telescopic member 16 to extend and retract, so as to control the two clutches. It should be noted that, when the first friction plate 14 is separated from the second friction plate 15, the third friction plate 24 is not engaged with the second friction plate 15, and therefore, after the first friction plate 14 is separated from the second friction plate 15 and before the third friction plate 24 is engaged with the second friction plate 15, the first clutch 1 and the second clutch 2 are in a neutral state, that is, the first clutch 1 and the second clutch 2 are simultaneously disengaged from the flywheel 300. In addition, when the second fixed disk 21 rotates, the third guide posts 23 also rotate in the same direction, and the driving between the pushing disk 12 and the third guide posts 23 is realized only by contact, that is, the third guide posts 23 and the pushing disk 12 can rotate relatively, so that interference is not generated.

Referring to fig. 9, 12 and 16, in some embodiments of the present application, an annular groove 121 is coaxially formed on the pushing plate 12 corresponding to the third guide post 23, and a spherical structure 232 is formed on one end of the third guide post 23 close to the flywheel 300, and the spherical structure 232 is slidably connected to the annular groove 121 along the circumferential direction of the crankshaft 200. The annular groove 121 can shorten the distance between the pushing disk 12 and the second fixed disk 21, so that the structure is more compact; on the other hand, the annular groove 121 is also convenient for storing solid or semi-solid lubricating oil for lubrication and heat dissipation. In addition, the spherical structure 232 is smoother and has lower sliding resistance.

Referring to fig. 7 and 10, in some embodiments of the present application, telescoping member 16 includes a housing 161, a thrust cap 162, a thrust block 163, a movable rod 164, and two thrust bearings 165; the thrust cover 162 is coaxially arranged at one end of the thrust plate 12 far away from the flywheel 300, and one end of the thrust cover 162 far away from the thrust plate 12 is provided with a first protruding part 1621 for positioning one end of one thrust bearing 165; one end of the shell 161 is provided with a abdicating hole 1611, and the other end of the shell 161 is of an open structure; the open structure of the casing 161 is arranged at one end of the thrust cover 162 far away from the flywheel 300, and a positioning groove 1612 for positioning one end of another thrust bearing 165 is formed at one end of the casing 161 close to the abdicating hole 1611; the thrust block 163 is coaxially arranged between the two thrust bearings 165, and both sides of the thrust block 163 are coaxially provided with second protruding parts 1631 for positioning the other ends of the corresponding thrust bearings 165; the movable rod 164 is coaxially disposed with the flywheel 300 (i.e., the crankshaft 200), one end of the movable rod 164 penetrates through the receding hole 1611 into the housing 161 and is then coaxially disposed on the thrust block 163, and the other end of the movable rod 164 is axially slidably disposed on the frame 100. As shown in fig. 15, the positioning groove 1612 can position the left end of the left thrust bearing 165, the second protrusion 1631 on the left side of the thrust block 163 can position the right end of the left thrust bearing 165, the second protrusion 1631 on the right side of the thrust block 163 can position the left end of the right thrust bearing 165, and the first protrusion 1621 on the left side of the thrust cap 162 can position the right end of the right thrust bearing 165, so that the housing 161, the thrust cap 162, the thrust plate 12, and the crank shaft 200 can relatively rotate with respect to the movable rod 164, and avoid the generation of motion interference, and the movable rod 164 and the thrust plate 12 can bear axial thrust (i.e., the movable rod 164 pushes the thrust plate 12 to the right) and axial tension (i.e., the movable rod 164 pulls the thrust plate 12 to the left). It should be noted that the movable rod 164 and the inner wall of the abdicating hole 1611, the movable rod 164 and the inner ring surface of the left thrust bearing 165, and the thrust block 163 and the inner ring surface of the housing 161 may be connected in a rotatable manner, and lubricating oil is filled in the relatively rotating portion between them for lubrication and heat dissipation. In addition, the present application is not limited to the axially slidable mounting manner between the movable rod 164 and the rack 100, for example, the movable rod 164 is coaxially connected to an expansion rod of a hydraulic cylinder (or an air cylinder) fixed to the rack 100, and the expansion rod of the hydraulic cylinder (or the air cylinder) can drive the movable rod 164 to axially slide relative to the rack 100 (i.e., the axial direction of the movable rod 164).

Referring to fig. 3, 9 and 11, in some embodiments of the present application, the number of the first guide pillars 13 and the second guide pillars 22 is at least two, the first mounting portions 131 on the first guide pillars 13 are sequentially connected to form a ring structure, and the second mounting portions 221 on the second guide pillars 22 are sequentially connected to form a ring structure; the first position-limiting portion 222, the second position-limiting portion 231 and the flywheel 300 are coaxially arranged. The first attachment portion 131 having the annular structure facilitates attachment of the annular first friction plate 14, the second attachment portion 221 having the annular structure facilitates attachment of the annular third friction plate 24, and the flywheel 300 enables attachment of the annular second friction plate 15, thereby increasing the coupling surfaces between the first friction plate 14 and the second friction plate 15 and between the third friction plate 24 and the second friction plate 15. It should be noted that, the specific fixing manner of the first friction plate 14, the second friction plate 15 and the third friction plate 24 is the prior art, and will not be described in detail herein.

It should be noted that the elastic members 25 and the elastic restoring members 57 are both in the prior art, and may be, for example, springs or other structures with sufficient elasticity, which are not described in detail herein.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (7)

1. A starting and stopping auxiliary system of stamping equipment is characterized by comprising a first clutch, a second clutch, a gear transmission assembly and a brake assembly; the first clutch is arranged on the crankshaft and is used for realizing power input between a flywheel and the crankshaft; the gear transmission assembly is arranged on the rack, the second clutch is arranged at the input end of the gear transmission assembly, and the second clutch is used for realizing power input between the flywheel and the gear transmission assembly;

the brake assembly comprises a cylinder body, a piston, a connecting rod and a rack; the piston is axially slidably arranged in the cylinder body, the piston is used for partitioning the interior of the cylinder body to form a first chamber and a second chamber, and the first chamber is filled with gas; one end of the connecting rod is arranged on the piston, the other end of the connecting rod is arranged at one end of the rack, and the rack is meshed with the output end of the gear transmission assembly;

when the stamping equipment stops working, the first clutch is separated from the flywheel, the second clutch is combined with the flywheel, and the flywheel can drive the piston to compress the gas in the first cavity sequentially through the gear transmission assembly, the rack and the connecting rod, so that the flywheel is braked;

the stamping equipment start-stop auxiliary system further comprises a starting assembly, wherein the starting assembly comprises an air storage tank, a first pipeline, a second pipeline, a first control valve, a second control valve, a one-way valve and an elastic resetting piece; two ends of the first pipeline are respectively communicated with the gas storage tank and the first cavity, and two ends of the second pipeline are respectively communicated with the gas storage tank and the second cavity; the first control valve and the one-way valve are arranged in the first pipeline in parallel, the one-way valve is used for limiting gas in the gas storage tank to enter the first chamber through the one-way valve, and the second control valve is arranged in the second pipeline; the elastic resetting piece is arranged in the first cavity;

when the piston compresses the gas in the first chamber, the first control valve and the second control valve are closed, so that the gas in the first chamber enters the gas storage tank through the one-way valve; when the flywheel stops rotating, the second clutch is separated from the flywheel, and the air pressure in the first cavity and the elastic resetting piece force the piston to slide towards the direction of the second cavity; when the stamping equipment is started, the second clutch is combined with the flywheel, the second control valve is opened, so that the gas in the gas storage tank enters the second chamber through the second pipeline and forces the piston to slide towards the first chamber, and the piston sequentially passes through the connecting rod, the rack and the gear transmission assembly to drive the flywheel to rotate; when the flywheel rotates, the second clutch is separated from the flywheel, the first control valve is opened, so that the air pressure in the first chamber and the air pressure in the second chamber are equal, and the elastic resetting piece can force the piston to slide towards the direction of the second chamber;

the first clutch comprises a first fixed disc, a pushing disc, a first guide pillar, a first friction plate, a second friction plate and a telescopic piece; the first fixed disc is coaxially arranged on the crankshaft, a positioning hole axially penetrates through the first fixed disc, and the pushing disc is axially slidably arranged on the crankshaft; the first guide pillar is axially slidably arranged in the positioning hole, one end, far away from the flywheel, of the first guide pillar is arranged on the pushing disc, and a first mounting part is arranged at one end, close to the flywheel, of the first guide pillar; the first friction plate is arranged on the first installation part, and the second friction plate is arranged on one side, close to the first friction plate, of the flywheel; the telescopic piece is arranged on the rack, and the telescopic end of the telescopic piece is coaxially and rotatably arranged on the pushing disc;

the second clutch comprises a second fixed disc, a second guide pillar, a third friction plate and an elastic piece; the second fixed disc is coaxially arranged on one side, far away from the flywheel, of the pushing disc, and the second fixed disc is coaxially arranged at the input end of the gear transmission assembly; a first accommodating cavity, a second accommodating cavity and a channel are formed in the second fixing disc, and one end, far away from the flywheel, in the first accommodating cavity is communicated with one end, far away from the flywheel, in the second accommodating cavity through the channel; a first through hole is formed in the first accommodating cavity in a penetrating manner at one end close to the flywheel, and a second through hole is formed in the second accommodating cavity in a penetrating manner at one end close to the flywheel;

the second guide pillar is axially slidably arranged in the first through hole, one end, close to the flywheel, of the second guide pillar is provided with a second mounting part for mounting the third friction plate, one end, far away from the flywheel, of the second guide pillar is provided with a first limiting part, and the first limiting part is axially slidably arranged in the first accommodating cavity;

the third guide post is axially slidably arranged in the second through hole, one end, far away from the flywheel, of the third guide post is provided with a second limiting part, and the second limiting part is axially slidably arranged in the second accommodating cavity;

a closed oil storage cavity filled with hydraulic oil is formed among the first limiting part, the second limiting part, the first accommodating cavity and the second accommodating cavity; the elastic piece is arranged in the first accommodating cavity and used for forcing the first limiting part to slide towards the direction far away from the flywheel, and the hydraulic oil in the oil storage cavity can push the second limiting part to slide towards the direction close to the flywheel; when the telescopic piece is shortened, the pushing disc and the first guide post slide towards the direction far away from the flywheel until the first friction plate is separated from the second friction plate, one side of the pushing disc far away from the flywheel forces the third guide post to slide towards the direction far away from the flywheel, and hydraulic oil in the oil storage cavity can push the first limiting part to slide towards the direction close to the flywheel until the third friction plate is combined with the second friction plate.

2. The stamping apparatus start-stop assist system of claim 1, wherein the gear drive assembly includes a mounting bracket, an inner gear ring, an outer gear ring, and at least three planet gears; the mounting frame is arranged on the rack, the outer gear ring is rotatably arranged on the rack, and the outer gear ring is coaxially connected with the second clutch; each of the planet gears is rotatably arranged on the mounting bracket, and each of the planet gears is meshed with the outer gear ring at equal intervals along the circumferential direction of the outer gear ring; the inner gear ring is coaxially arranged on the outer side of the outer gear ring, the inner gear ring is meshed with the planetary gears, and tooth grooves used for meshing the racks are formed in the outer annular surface of the inner gear ring.

3. The stamping apparatus start-stop auxiliary system of claim 2, wherein the brake assembly further comprises a limit chute, the limit chute is disposed on the frame, and the rack is slidably connected to the limit chute along a sliding direction of the piston; a notch is formed in the position, corresponding to the inner gear ring, of the limiting sliding groove, the tooth socket on the inner gear ring is meshed with the rack through the notch, and the limiting sliding groove is used for limiting the axial movement of the inner gear ring.

4. The stamping device start-stop auxiliary system as defined in claim 3, wherein the number of the brake assemblies is two, and the racks on the two brake assemblies are oppositely arranged on two sides of the ring gear.

5. The auxiliary start-stop system for a punching device according to claim 1, wherein the pushing plate has an annular groove coaxially formed at a position corresponding to the third guide post, and the third guide post has a spherical structure at an end thereof adjacent to the flywheel, the spherical structure being slidably coupled to the annular groove along a circumferential direction of the crankshaft.

6. The stamping apparatus start-stop assist system of claim 1, wherein the telescoping member comprises a housing, a thrust cap, a thrust block, a movable rod, and two thrust bearings; the thrust cover is coaxially arranged at one end, far away from the flywheel, of the thrust disc, and a first protruding part used for positioning one end of one thrust bearing is arranged at one end, far away from the thrust disc, of the thrust cover; one end of the shell is provided with a abdicating hole, and the other end of the shell is of an open structure; the open structure of the shell is arranged at one end, far away from the flywheel, of the thrust cover, and a positioning groove for positioning one end of the other thrust bearing is formed at one end, close to the abdicating hole, in the shell; the thrust block is coaxially arranged between the two thrust bearings, and two sides of the thrust block are coaxially provided with second protruding parts used for positioning the other ends of the corresponding thrust bearings; the movable rod with the flywheel is coaxial to be arranged, the one end of movable rod is passed through the hole of stepping down runs through extremely coaxial set up again behind the inside of shell in the thrust block, but the other end axial sliding of movable rod set up in the frame.

7. The auxiliary start-stop system for a punching device according to claim 1, wherein the number of the first guide pillars and the number of the second guide pillars are at least two, the first mounting portions of the first guide pillars are sequentially connected to form a ring structure, and the second mounting portions of the second guide pillars are sequentially connected to form a ring structure; the first installation part, the second installation part and the flywheel are coaxially arranged.

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