CN213135274U - Efficient open-close type rim cutting sawing machine - Google Patents

Abstract

The application relates to a high-efficiency open-close type rim cutting sawing machine, which relates to the field of rim processing, which comprises a frame, a workbench and a cutting device are arranged on the frame, the cutting device is positioned above the workbench, the workbench is provided with a fixing device, the fixing device is sleeved with a rim, the fixing device is arrayed in a plurality along the circumferential direction of the rim, the workbench is provided with a propping device, the propping device is arranged outside the rim, and a plurality of the abutting devices are arrayed along the circumferential direction of the rim, each abutting device comprises a fixed block, each fixed block is provided with a sliding chute facing the rim, a sliding block is arranged in the sliding groove in a sliding manner, a first compression spring is arranged between the sliding block and the groove bottom of the sliding groove, the one end that the slider faced the rim is equipped with the inclined plane, the inclined plane sets up towards the top, when the rim was put between tight device and the fixing device, the side and the inclined plane butt of rim. This application has only to press the rim can be fixed the rim, installation effectiveness and the efficient effect of cutting.

Description

Efficient open-close type rim cutting sawing machine

Technical Field

The application relates to the field of rim processing, in particular to an efficient opening and closing type rim cutting sawing machine.

Background

In the production process of the bicycle rim, the processes of circle passing, sawing, splicing, punching, aging, oxidation and the like need to be performed, wherein one of the key processes is performed in the sawing process, and the quality of the sawing process is the key for determining the quality of the splicing process.

Chinese patent No. CN2574816Y discloses an opening and closing rim cutting sawing machine. The left clamping table and the right clamping table are arranged on the workbench in a relatively parallel mode, a plurality of movable positioning blocks and movable positioning rods are arranged on the working surfaces of the left clamping table and the right clamping table in a surrounding mode, a ring material workpiece which is well encircled is fixed to the left clamping table and the right clamping table, the ring material workpiece is positioned through the movable positioning blocks, the movable positioning rods and the fixed positioning blocks, a transmission motor is started to drive the saw blade to rotate and cut, after the ring material is sawn off, the left clamping table and the right clamping table rotate along the positioning shaft, and the sawn section of the ring material workpiece and the saw blade are moved away for a certain distance. The cutting slide plate drives the saw blade shaft box and the saw blade to reset, and the whole operation process is completed.

The inventor finds that when operating, the operator needs to place the rim between the movable positioning block and the movable positioning rod and then fix the rim one by one, and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the lifting efficiency, the application provides an efficient open-close type rim cutting sawing machine.

The application provides a pair of efficient open-close type rim cutting sawing machine adopts following technical scheme: the utility model provides an efficient open-close type rim cutting sawing machine, includes the frame, be equipped with workstation and cutting device in the frame, cutting device is located the top of workstation, be equipped with fixing device on the workstation, the fixing device overcoat is equipped with the rim, fixing device has a plurality ofly along the circumference array of rim, be equipped with on the workstation and support tight device, support tight device and locate outside the rim, and have a plurality ofly along the circumference array of rim, support tight device and include the fixed block, the spout has been seted up towards the rim to the fixed block, sliding connection has the slider in the spout, be equipped with first compression spring between the tank bottom of slider and spout, the slider is equipped with the inclined plane towards the one end of rim, the inclined plane sets up towards the top, when the rim is put between tight device and fixing device, the side and the inclined plane butt of rim.

Through adopting above-mentioned technical scheme, during the installation rim, put the rim between supporting tight device and fixing device, the side and the inclined plane butt of rim, then press the slider back the spout through the inclined plane, after the rim pressed to target in place, the slider reseed under first compression spring's spring action, with the rim lock in supporting between tight device and fixing device, only need press the rim and can realize fixing, promoted assembly efficiency, and then promoted cutting efficiency.

Preferably, the fixed block is equipped with worker's shape piece towards the workstation, first T-shaped groove has been seted up along the radial of rim on the workstation, worker's shape piece and first T-shaped groove sliding connection, first T-shaped inslot is equipped with first screw rod along its length direction, first screw rod rotates with the lateral wall in first T-shaped groove to be connected, first screw rod and worker's shape piece threaded connection, the vertical turning handle that is equipped with on the workstation, the turning handle passes through the worm gear transmission and is connected with first screw rod.

Through adopting above-mentioned technical scheme, rotate the turning handle, drive the third screw rod and rotate for the I-shaped piece slides in first T-shaped inslot, adjusts the position of fixed block, adapts to the rim of different sizes.

Preferably, the vertical rotation is connected with the second screw rod in the worker's shape piece, second screw rod and fixed block threaded connection, the top of second screw rod is equipped with the handle, still be fixed with the guide post in the worker's shape piece, the guide post is worn in the fixed block, all overlap on guide post and the second screw rod and be equipped with second compression spring, second compression spring's one end and worker's shape piece butt, the other end and fixed block butt.

Through adopting above-mentioned technical scheme, the rotation piece drives the second screw rod and rotates, and then drives the fixed block and reciprocates, adapts to the rim of different thickness.

Preferably, the fixing device comprises a plurality of fixing columns and a plurality of rotating rings, the fixing columns are arranged along the circumferential array of the rotating rings, sliding grooves connected with the fixing columns in a sliding mode are formed in the workbench and are formed along the radial direction of the rotating rings, circular arc protrusions are arranged on the rotating rings towards the fixing columns, the circular arc protrusions are arranged along the circumferential array of the rotating rings, the number of the circular arc protrusions is consistent with the number of the fixing columns, and when the protruding portions of the circular arc protrusions are abutted to the fixing columns, the fixing columns are abutted to the inner rings of the rim.

Through adopting above-mentioned technical scheme, when needing to press from both sides tightly, rotatory rotating ring makes the protruding and fixed column butt of circular arc, and a plurality of fixed columns support tight rim simultaneously again, further fixes the rim, promotes the installation accuracy.

Preferably, the workbench is rotatably connected with a large gear, an inner gear meshed with the large gear is arranged on the inner wall of the rotating ring, and a rotating part is arranged on the end face of the large gear.

Through adopting above-mentioned technical scheme, the rotation piece drives gear wheel rotation, drives the swivel becket rotation again, and is comparatively laborsaving.

Preferably, the workbench is further connected with a locking gear meshed with the large gear in a sliding mode, the locking gear is provided with a first T-shaped block towards the workbench, a second T-shaped groove for sliding the first T-shaped block is formed in the workbench, and a locking bolt is connected to the end face of the locking gear in a threaded mode.

Through adopting above-mentioned technical scheme, when needs locking swivel becket, slip locking gear makes locking gear and gear wheel meshing, screws the locking bolt again, can be fixed with the gear wheel, and then fixed swivel becket makes the fixed column support tight rim all the time.

Preferably, the workstation is including the left platform and the right platform of mutual articulated, the swivel becket includes left side ring and right ring, gear wheel and locking gear set up along the boundary line symmetry of left platform and right platform, be equipped with the bottom plate of supporting the workstation in the frame, still be equipped with drive left platform and right platform pivoted drive arrangement on the bottom plate.

Through adopting above-mentioned technical scheme, after cutting device cuts the rim, drive arrangement drive left platform and right platform rotate around the pin joint of the two for left platform and right platform separate, produce the phenomenon of sweeping the saw when reducing the cutting device return stroke.

Preferably, the driving device comprises a cylinder and two connecting rods, the cylinder is mounted on the bottom plate and located at one end, away from the hinge joint point of the left platform and the right platform, of the workbench, one end of each connecting rod is hinged to the extending rod of the cylinder, one end, away from the cylinder, of each connecting rod is hinged to the left platform, and the other end, away from the cylinder, of each connecting rod is hinged to the right platform.

Through adopting above-mentioned technical scheme, the extension bar of cylinder stretches out, and two connecting rods move towards workstation width direction's both ends for left platform and right platform part, and then make two rims separation sawed, the cutting device of being convenient for resets.

Preferably, the cutting device comprises a top plate and a cutting assembly, the top plate is mounted on a rack, support plates are arranged on the rack, the support plates are oppositely arranged along the length direction of the top plate, third screw rods are rotatably connected to the support plates, a motor is mounted on one of the support plates, an output shaft of the motor is coaxially fixed with the third screw rods, the third screw rods are in threaded connection with the cutting assembly, guide rods are slidably connected in the cutting assembly, and the guide rods are fixedly connected with the support plates;

the cutting assembly is provided with a rotating microswitch and a resetting microswitch on the side face of the top plate, the cutting assembly is provided with a contact for triggering the rotating microswitch and the resetting microswitch, the rotating microswitch is arranged at the tail end of the feeding of the cutting assembly, and the resetting microswitch is arranged at the tail end of the return stroke of the cutting assembly.

Through adopting above-mentioned technical scheme, the motor starts, drives the third screw rod and rotates, and drive cutting assembly removes along the guide bar, cuts the rim, and after cutting assembly cutting finished, the contact triggered and rotates micro-gap switch, and the extension bar of cylinder stretches out, and left platform and right platform rotate the separation, and the rim separation resets when cutting assembly, and the contact triggers the micro-gap switch that resets, and the extension bar withdrawal of cylinder, left platform and right platform merge.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the fixing device, the fixing block, the first compression spring, the sliding block and the inclined plane, the rim can be fixed only by pressing down the rim, and the effects of high mounting efficiency and high cutting efficiency are achieved;

2. through the bellied setting of rotating ring, fixed column, circular arc, have the effect that promotes the cutting efficiency and the precision of cutting machine.

Drawings

Fig. 1 is a schematic structural diagram of the whole in the embodiment of the present application.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view of a portion B in fig. 1.

Fig. 4 is a schematic structural diagram showing the slider, the chute, and the first compression spring in the embodiment of the present application.

FIG. 5 is a schematic diagram of a cutting assembly embodied in an embodiment of the present application.

Description of reference numerals: 1. a frame; 2. a base plate; 21. a work table; 211. a left stage; 212. a right stage; 22. a fixing device; 221. a rotating ring; 2211. a left ring; 2212. a right ring; 2213. a circular arc bulge; 222. a bull gear; 2221. a rotating member; 2222. an internal gear; 223. a locking gear; 2231. a first T-shaped block; 2232. a second T-shaped slot; 2233. locking the bolt; 224. fixing a column; 2241. a sliding groove; 23. a rotating shaft; 24. a drive device; 241. a cylinder; 242. a connecting rod; 25. a tightening device; 251. a fixed block; 2511. a chute; 2512. a slider; 2513. a first compression spring; 2514. a bevel; 2515. a bump; 2516. a groove; 252. a H-shaped block; 2521. a first T-shaped slot; 2522. a first screw; 2523. a handle is rotated; 2524. a second screw; 2525. a guide post; 2526. a second compression spring; 2527. calibration; 3. a cutting device; 31. a top plate; 311. a support plate; 312. a third screw; 313. a motor; 314. a guide bar; 315. mounting a plate; 32. a cutting assembly; 321. a drive motor; 322. a saw blade; 33. rotating the microswitch; 34. resetting the microswitch; 35. a contact; 4. and (4) a rim.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses an efficient open-close type rim cutting sawing machine.

Referring to fig. 1, the sawing machine comprises a frame 1, a bottom plate 2 and a cutting device 3 are arranged on the frame 1 from bottom to top, the bottom plate 2 is fixedly connected with the frame 1, a workbench 21 is placed on the bottom plate 2, a fixing device 22 for fixing a rim 4 and a butting device 25 are arranged on the workbench 21, and the cutting device 3 comprises a top plate 31 and a cutting assembly 32 installed on the bottom surface of the top plate 31. When cutting, the rim 4 is fixed by the fixing device 22 and the abutting device 25, and then the cutting device 3 performs cutting.

Referring to fig. 1 and 2, the worktable 21 includes a left table 211 and a right table 212, the left table 211 and the right table 212 are hinged to each other by a rotating shaft 23, and the rotating shaft 23 is fixedly connected to the worktable 21. The fixing device 22 comprises a rotating ring 221 and a plurality of fixing columns 224, the fixing columns 224 are arrayed along the circumferential direction of the rotating ring 221, and the rim 4 is sleeved outside the plurality of fixing rings.

The rotating ring 221 includes a left ring 2211 and a right ring 2212, the left ring 2211 and the right ring 2212 are symmetrically arranged along a boundary between the left platform 211 and the right platform 212, and both the left ring 2211 and the right ring 2212 are rotatably connected with the left platform 211 or the right platform 212 along the center of the circle. The workbench 21 is provided with a sliding groove 2241 in sliding connection with the fixing column 224, the sliding groove 2241 is arranged along the radial direction of the rotating ring 221, the rotating ring 221 is integrally formed with an arc protrusion 2213 towards the fixing column 224, the arc protrusion 2213 is arranged along the circumferential array of the rotating ring 221 in a plurality, and the number of the arc protrusions 2213 is consistent with that of the fixing column 224. Rotate left ring 2211 and right ring 2212, when the protruding department of circular arc arch 2213 and fixed column 224 butt, a plurality of fixed column 224 all with the inner circle butt of rim 4, and then fixed rim 4.

Referring to fig. 2, the left table 211 and the right table 212 are respectively rotatably connected with a large gear 222, the left ring 2211 and the right ring 2212 are respectively and fixedly connected with an inner gear 2222 engaged with the large gear 222, and a rotating member 2221 is fixed on the top surface of the large gear 222 for driving the large gear 222 to rotate. In order to lock the large gear 222, a locking gear 223 is further arranged on the workbench 21, the locking gear 223 is fixedly connected with a first T-shaped block 2231 facing the workbench 21, a second T-shaped groove 2232 for the first T-shaped block 2231 to slide is formed in the workbench 21, and a locking bolt 2233 is connected to the end surface of the locking gear 223 in a threaded manner. When the large gear 222 needs to be locked, the locking gear 223 is pushed to engage the locking gear 223 with the large gear 222, and then the locking bolt 2233 is tightened.

Referring to fig. 3, a plurality of abutting devices 25 are arranged in an array along the circumferential direction of the rotating ring 221 and are all located outside the rim 4, each abutting device 25 includes a fixed block 251 and an i-shaped block 252, a first T-shaped groove 2521 slidably connected with the i-shaped block 252 is formed in the workbench 21 along the radial direction of the rim 4, a first screw 2522 is arranged in the first T-shaped groove 2521 along the length direction thereof, the first screw 2522 is rotatably connected with two side walls of the first T-shaped groove 2521 along the length direction thereof, the first screw 2522 is in threaded connection with the i-shaped block 252, a rotating handle 2523 is vertically and rotatably connected to the workbench 21, and the rotating handle 2523 is connected with the first screw 2522 through worm and gear transmission to further drive the third screw 312 to rotate. To facilitate the adjustment of the distance of the block 252, a scale 2527 is engraved on the surface of the table 21 on one side of the first T-shaped groove 2521 in the width direction thereof, the scale 2527 being disposed along the length direction of the first T-shaped groove 2521.

The second screw 2524 is vertically and rotatably connected in the i-shaped block 252, the second screw 2524 is in threaded connection with the fixed block 251, the top of the second screw 2524 penetrates through the fixed block 251 and is fixedly connected with a handle, a guide post 2525 is further fixed in the i-shaped block 252, and the guide post 2525 penetrates through the fixed block 251 and is used for guiding the fixed block 251. For the convenience of shock absorption, the second compression spring 2526 is sleeved on both the guide post 2525 and the second screw 2524, one end of the second compression spring 2526 abuts against the i-shaped block 252, and the other end abuts against the fixing block 251.

Referring to fig. 4, the fixed block 251 has been seted up spout 2511 towards rim 4, and sliding connection has slider 2512 in the spout 2511, and there is first compression spring 2513 slider 2512 and the tank bottom butt of spout 2511, and slider 2512 has seted up inclined plane 2514 towards the one end of rim 4, and inclined plane 2514 sets up towards the top, and the projection of the outside border vertical direction of rim 4 falls on inclined plane 2514. Both side walls of the slider 2512 are fixed with protrusions 2515, the side walls of the sliding slot 2512 are provided with grooves 2516 for the protrusions 2515 to slide, and one end of each groove 2516 facing the rim 4 is not opened, so that the possibility that the slider 2512 is separated from the sliding slot 2512 is reduced.

Referring to fig. 1 and 5, a driving device 24 is further provided on the base plate 2. The driving device 24 includes a cylinder 241 and a connecting rod 242, the cylinder 241 is installed on the bottom plate 2 and is located at one end of the workbench 21 far away from the hinge point of the left table 211 and the right table 212. Two connecting rods 242 are provided, one end of each connecting rod 242 is hinged with one end of the extending rod of the cylinder 241 far away from the cylinder 241, one end of one connecting rod 242 far away from the cylinder 241 is hinged with the left platform 211, and one end of the other connecting rod 242 far away from the cylinder 241 is hinged with the right platform 212. The extending rod of the cylinder 241 is extended, and the two connecting rods 242 move towards the two ends of the workbench 21 in the width direction, so that the left table 211 and the right table 212 are separated, and the two sawn rims 4 are separated, and the cutting device 3 is convenient to reset.

Referring to fig. 5, the cutting assembly 32 includes a mounting plate 315, a driving motor 321, and a saw blade 322, the driving motor 321 and the saw blade 322 are both mounted on the bottom surface of the mounting plate 315, and the driving motor 321 drives the saw blade 322 to rotate through belt transmission. The two ends of the rack 1 along the length direction of the top plate 31 are fixedly connected with supporting plates 311, the supporting plates 311 are rotatably connected with third screw rods 312, one of the supporting plates 311 is provided with a motor 313, an output shaft of the motor 313 is coaxially fixed with the third screw rods 312, the third screw rods 312 are in threaded connection with a mounting plate 315, a guide rod 314 is fixedly connected between the two supporting plates 311, and the mounting plate 315 is in sliding connection with the guide rod 314. A rotary microswitch 33 and a reset microswitch 34 are mounted on the side surface of the top plate 31, a contact 35 which can trigger the rotary microswitch 33 and the reset microswitch 34 is mounted on the side surface of the mounting plate 315, the rotary microswitch 33 is arranged at the tail end of the feeding of the cutting assembly 32 and is used for starting after the cutting assembly 32 finishes cutting, and the reset microswitch 34 is arranged at the tail end of the return stroke of the cutting assembly 32 and is used for triggering after the cutting assembly 32 resets.

The implementation process of the high-efficiency opening-closing rim cutting sawing machine in the embodiment of the application is as follows: before installation, according to the size of the rim 4 to be processed, the rotating handle 2523 is rotated to drive the third screw 312 to rotate, and the third screw 312 drives the tooling block 252 to slide along the length direction of the first T-shaped groove 2521 and adjust to a corresponding position according to the scale 2527. The rim 4 is placed between the fixing posts 224 and the fixing blocks 251, when the rim 4 is put down, the outer side edge of the rim 4 abuts against the inclined surface 2514, the sliding block 2512 is pressed back to the sliding groove 2511, the rim 4 is placed on the workbench 21, and then the sliding block 2512 is reset under the action of the first compression spring 2513, so that the rim 4 is limited. Then, the rotating part 2221 is rotated to drive the large gear 222 to rotate, and then the rotating ring 221 is driven to rotate, so that the protruding part of the circular ring is abutted to the fixed column 224, and the rim 4 is further locked. Then, the locking gear 223 is pushed to engage the locking gear 223 with the large gear 222, and the large gear 222 can be fixed by tightening the locking bolt 2233. If the rim 4 needs to be further pressed, the handle can be rotated, and the second screw 2524 drives the fixing block 251 to be pressed downwards, so that the rim 4 is further pressed.

Then the driving motor 321 is started to drive the saw blade 322 to rotate, the motor 313 is started to drive the third screw 312 to rotate, and further drive the mounting plate 315 to move along the guide post 2525, so that the saw blade 322 cuts the rim 4, when the saw blade 322 cuts off the rim 4 and moves to the stroke end, the contact 35 triggers the rotation micro switch 33, the extension rod of the air cylinder 241 extends out, the left platform 211 and the right platform 212 rotate to separate, the rim 4 separates, after the cutting assembly 32 resets, the contact 35 triggers the reset micro switch 34, the extension rod of the air cylinder 241 retracts, and the left platform 211 and the right platform 212 are combined. Finally, the rim 4 can be taken down by loosening the first screw 2522, the second screw 2524 and the locking bolt 2233.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides an efficient open-close type rim cutting sawing machine which characterized in that: the device comprises a rack (1), wherein a workbench (21) and a cutting device (3) are arranged on the rack (1), the cutting device (3) is positioned above the workbench (21), a fixing device (22) is arranged on the workbench (21), a rim (4) is sleeved outside the fixing device (22), a plurality of fixing devices (22) are arranged along the circumferential array of the rim (4), a tightening device (25) is arranged on the workbench (21), the tightening device (25) is arranged outside the rim (4), a plurality of tightening devices (25) are arranged along the circumferential array of the rim (4), each tightening device (25) comprises a fixing block (251), a sliding groove (2511) is formed towards the rim (4) by the fixing block (251), a sliding block (2512) is connected in the sliding groove (2511) in a sliding manner, a first compression spring (2513) is arranged between the sliding block (2512) and the groove bottom of the sliding groove (2511), slider (2512) are equipped with inclined plane (2514) towards the one end of rim (4), inclined plane (2514) set up towards the top, when rim (4) was put between tight device (25) and fixing device (22), the side and the inclined plane (2514) butt of rim (4).

2. A high efficiency, open-close type rim cutting saw machine as claimed in claim 1, wherein: the fixed block (251) is equipped with worker's shape piece (252) towards workstation (21), first T-slot (2521) has been seted up along the radial of rim (4) on workstation (21), worker's shape piece (252) and first T-slot (2521) sliding connection, be equipped with first screw rod (2522) along its length direction in first T-slot (2521), first screw rod (2522) are connected with the lateral wall rotation of first T-slot (2521), first screw rod (2522) and worker's shape piece (252) threaded connection, vertically be equipped with turning handle (2523) on workstation (21), turning handle (2523) are connected with first screw rod (2522) through worm gear transmission.

3. A high efficiency, open-close type rim cutting saw machine as claimed in claim 2, wherein: the inner portion of the I-shaped block (252) is vertically and rotatably connected with a second screw rod (2524), the second screw rod (2524) is in threaded connection with the fixed block (251), a handle is arranged at the top of the second screw rod (2524), a guide column (2525) is further fixed in the I-shaped block (252), the guide column (2525) penetrates through the fixed block (251), a second compression spring (2526) is sleeved on the guide column (2525) and the second screw rod (2524), one end of the second compression spring (2526) is abutted to the I-shaped block (252), and the other end of the second compression spring is abutted to the fixed block (251).

4. A high efficiency, open-close type rim cutting saw machine as claimed in claim 1, wherein: the fixing device (22) comprises a plurality of fixing columns (224) and a rotating ring (221), the fixing columns (224) are arranged in a plurality of circumferential arrays along the rotating ring (221), a sliding groove (2241) in sliding connection with the fixing columns (224) is formed in the workbench (21), the sliding groove (2241) is formed in the radial direction of the rotating ring (221), arc protrusions (2213) are arranged on the rotating ring (221) towards the fixing columns (224), the arc protrusions (2213) are arranged in a plurality of circumferential arrays along the rotating ring (221), the number of the arc protrusions (2213) is consistent with the number of the fixing columns (224), and when the protrusions of the arc protrusions (2213) are abutted to the fixing columns (224), the fixing columns (224) are abutted to the inner ring of the vehicle wheel (4).

5. A high efficiency, open-close type rim cutting saw machine as claimed in claim 4, wherein: the rotary table is characterized in that a large gear (222) is rotatably connected to the working table (21), an inner gear (2222) meshed with the large gear (222) is arranged on the inner wall of the rotating ring (221), and a rotating piece (2221) is arranged on the end face of the large gear (222).

6. A high efficiency, open-close type rim cutting saw machine as claimed in claim 5, wherein: still sliding connection has locking gear (223) with gear wheel (222) meshing on workstation (21), locking gear (223) are equipped with first T-shaped piece (2231) towards workstation (21), set up on workstation (21) and supply first T-shaped piece (2231) gliding first T-shaped groove (2521), threaded connection has locking bolt (2233) on the terminal surface of locking gear (223).

7. A high efficiency, open-close type rim cutting saw machine as claimed in claim 6, wherein: workstation (21) are including mutual articulated left platform (211) and right platform (212), it includes left ring (2211) and right ring (2212) to rotate ring (221), gear wheel (222) and locking gear (223) set up along the line of demarcation symmetry of left platform (211) and right platform (212), be equipped with bottom plate (2) of supporting workstation (21) on frame (1), still be equipped with drive left platform (211) and right platform (212) pivoted drive arrangement (24) on bottom plate (2).

8. A high efficiency, open-close type rim cutting saw machine as claimed in claim 7, wherein: the driving device (24) comprises an air cylinder (241) and two connecting rods (242), the air cylinder (241) is installed on the bottom plate (2) and located at one end, far away from a hinge point of the left platform (211) and the right platform (212), of the workbench (21), the two connecting rods (242) are arranged, one end of each connecting rod (242) is hinged to an extending rod of the air cylinder (241), one end, far away from the air cylinder (241), of each connecting rod (242) is hinged to the left platform (211), and the other end, far away from the air cylinder (241), of each connecting rod (242) is hinged to the right platform (212).

9. A high efficiency, open-close type rim cutting saw machine as claimed in claim 8, wherein: the cutting device (3) comprises a top plate (31) and a cutting assembly (32), the top plate (31) is installed on a rack (1), a support plate (311) is arranged on the rack (1), the support plate (311) is oppositely arranged along the length direction of the top plate (31), a third screw (312) is rotatably connected to the support plate (311), a motor (313) is installed on one support plate (311), an output shaft of the motor (313) is coaxially fixed with the third screw (312), the third screw (312) is in threaded connection with the cutting assembly (32), a guide rod (314) is slidably connected to the cutting assembly (32), and the guide rod (314) is fixedly connected with the support plate (311);

the rotary micro switch and the reset micro switch are arranged on the side face of the top plate (31), a contact (35) for triggering the rotary micro switch (33) and the reset micro switch (34) is arranged on the cutting assembly (32), the rotary micro switch (33) is arranged at the tail end of the feeding of the cutting assembly (32), and the reset micro switch (34) is arranged at the tail end of the return stroke of the cutting assembly (32).

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