CN219337326U

CN219337326U - Stainless steel pipe polishing machine

Info

Publication number: CN219337326U
Application number: CN202320608664.0U
Authority: CN
Inventors: 张朝捷; 姜龙
Original assignee: Zhejiang Bangnuo Steel Pipe Co ltd
Current assignee: Zhejiang Bangnuo Steel Pipe Co ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-07-14
Anticipated expiration: 2033-03-20

Abstract

The application relates to a stainless steel pipe polishing machine, include the frame and locate the polishing mechanism in the frame, its characterized in that: the machine frame is provided with a clamping mechanism connected to the machine frame, the clamping mechanism comprises a clamping wheel, the polishing mechanism comprises a polishing wheel driven by a motor, a stainless steel pipe is positioned between the clamping wheel and the polishing wheel, the clamping wheel and the polishing wheel relatively extrude the stainless steel pipe, and an auxiliary clamping part capable of adjusting clamping force is further arranged between the clamping mechanism and the machine frame. The polishing mechanism capable of adapting to the size deviation of the stainless steel pipe is provided, the polishing wheel can still be clung to the stainless steel pipe to the size deviation clamping mechanism, and the stable polishing effect is always kept, so that the effect that the stainless steel pipe with the size deviation can still keep polishing precision is achieved.

Description

Stainless steel pipe polishing machine

Technical Field

The application relates to the technical field of polishing machines, in particular to a stainless steel tube polishing machine.

Background

The stainless steel pipe polishing machine is equipment for processing stainless steel materials for polishing and removing burrs on the surface of a stainless steel pipe, and the conventional polishing machine is a method for adjusting polishing force by adjusting the size between a polishing wheel and the stainless steel pipe in an adjusting mode suitable for the stainless steel pipes with different sizes at present.

The prior Chinese patent with the publication number of CN204075973U discloses a stainless steel tube polishing machine, which comprises a frame, wherein an upper polishing wheel and a lower polishing wheel are arranged on the frame, and an upper and lower adjusting mechanism capable of adjusting the distance between the upper polishing wheel and the lower polishing wheel is also arranged on the frame.

For the related technology, the stainless steel pipe polishing machine is applicable to stainless steel pipes with different outer diameter specifications; however, when the outer wall of the same stainless steel pipe has dimensional deviation, the polishing machine cannot be adjusted dynamically in real time, that is, the polishing precision of the current polishing machine on the same stainless steel pipe is not high enough, so that improvement is still needed.

Disclosure of Invention

In order to enable the polishing machine to keep consistent polishing precision of all parts of a steel pipe when the outer walls of the same stainless steel pipe are subjected to dimensional deviation, the application provides a stainless steel pipe polishing machine.

The application provides a stainless steel pipe burnishing machine adopts following technical scheme:

the stainless steel tube polishing machine comprises a machine frame and a polishing mechanism arranged on the machine frame, wherein the machine frame is provided with a clamping mechanism, the clamping mechanism comprises a clamping wheel movably connected to the machine frame, the polishing mechanism comprises a polishing wheel driven by a driving motor, the stainless steel tube is positioned between the clamping wheel and the polishing wheel, and the clamping wheel and the polishing wheel squeeze the stainless steel tube relatively; the frame is provided with an auxiliary clamping part for adjusting the clamping wheel.

By adopting the technical scheme, the stainless steel pipe is polished by the polishing wheel driven by the driving motor, the stainless steel pipe is tightly attached to the polishing wheel at any time when the polishing wheel is clamped by the clamping mechanism, the polishing wheel and the stainless steel pipe are matched to work to generate stable polishing force, and the polishing force of the polishing wheel can be further adjusted by the auxiliary clamping part.

Preferably, the clamping mechanism further comprises a first spring, a clamping frame and a first connecting rod, wherein the clamping frame supports the clamping wheel, one end of the first spring is connected with the clamping frame, the other end of the first spring is connected with the frame, and the first spring and the polishing wheel are arranged in a staggered manner and are positioned on one side of the stainless steel pipe; the first connecting rod is fixed on the clamping frame and penetrates through the first spring, the frame is provided with a first guide hole, and the first connecting rod extends and penetrates through the first guide hole.

Through adopting above-mentioned technical scheme, polishing wheel and pinch roller pass through first spring coupling, can make the stability that keeps polishing dynamics constantly between stainless steel pipe and the polishing wheel, and first connecting rod cooperatees with first guiding hole, can guarantee the stability that the pinch roller keeps vertical direction to can guarantee that the direction of motion of first spring is stable.

Preferably, the auxiliary clamping part comprises an auxiliary supporting rod, a second spring and an auxiliary adjusting part, the auxiliary supporting rod is fixed on the other side of the clamping frame opposite to the first spring, the second spring is fixed above the auxiliary supporting rod, the auxiliary adjusting part comprises an auxiliary screw rod which is connected to the frame in a lifting manner, the auxiliary screw rod is fixed above the second spring, a screw rod guide hole is formed in the frame, and the auxiliary screw rod penetrates through the screw rod guide hole.

Through adopting above-mentioned technical scheme, through the setting of auxiliary clamping portion, can be on the basis that does not destroy original structure and function, adjust the clamp force through the setting of second spring to adapt to the nonrust steel pipe of different pipe diameters and processing requirement.

Preferably, the auxiliary adjusting part further comprises a gear, a pressing block, a synchronous belt and a rotary table, the gear is in threaded fit connection with the auxiliary screw, the pressing block is fixed on the rack and is abutted to the gear, the gear rotates relative to the rack, the rotary table is rotationally connected to the rack, two ends of the synchronous belt are respectively meshed with the gear and the rotary table, the rotary table rotates, and the synchronous belt drives the gear to rotate.

Through adopting above-mentioned technical scheme, gear rotation makes auxiliary screw reciprocate to drive the extension or the shortening of second spring, thereby realize the accurate adjustment of pressure, through introducing long-range transmission, can make operating personnel at the outside operation of organism, the security when increasing the burnishing machine and using.

Preferably, the auxiliary clamping part further comprises an auxiliary supporting seat and a second connecting rod, the auxiliary supporting seat is fixed on the side wall of the auxiliary supporting rod, the second connecting rod is fixed on the auxiliary supporting seat, the frame is provided with a second guide hole, and the second connecting rod extends and penetrates through the second guide hole.

Through adopting above-mentioned technical scheme, second connecting rod and second guiding hole cooperation further promote hold-down mechanism's overall stability, less influence by other direction's force, guarantee the polishing precision.

Preferably, the stand is provided with an abutting mechanism, the abutting mechanism comprises a first motor, a pressing wheel and an abutting plate, the first motor is fixed on the stand, the pressing wheel is an eccentric wheel and is fixed on an output shaft of the first motor, and the abutting plate is fixed on the clamping frame and is positioned below the pressing wheel; the pinch roller rotates downwards to squeeze the abutting plate, and the abutting plate and the clamping frame move downwards.

By adopting the technical scheme, the stainless steel tube feeding is more convenient, the workpiece is not impacted by the clamping wheel to deform during clamping, and the process production requirement is ensured.

Preferably, the polishing mechanism further comprises a driving wheel, a driving belt and a driven wheel, wherein the driving motor is fixed on the frame, the driving wheel is fixed on an output shaft of the driving motor, the driven wheel is fixed on the polishing wheel, the driving wheel and the driven wheel are positioned on the same plane, and the driving belt is in transmission connection with the driving wheel and the driven wheel.

Through adopting above-mentioned technical scheme, driving motor sets up in keeping away from the polishing wheel department, under the prerequisite of guaranteeing polishing wheel power, has reserved the space for clamping mechanism and abutting mechanism, makes its cooperation with the polishing wheel inseparabler.

Preferably, the frame is provided with a supporting wheel at one side of the clamping wheel, and the stainless steel tube is arranged on the supporting wheel and the clamping wheel.

By adopting the technical scheme, the supporting wheel and the clamping wheel support the stainless steel tube together, so that the front end and the rear end of the stainless steel tube are balanced, and the stainless steel tube is ensured to have enough stability during polishing.

Preferably, the turntable is provided with a handle body, the handle body comprises a fixed handle and a connecting handle, the fixed handle is fixed at the eccentric position above the turntable, the fixed handle drives the turntable to rotate, and the connecting handle is sleeved on and connected with the fixed handle.

Through adopting above-mentioned technical scheme, fixed handle can drive the carousel rotation, and the connection handle facilitates the user to rotate the carousel with more suitable mode.

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

1. the polishing wheel is tightly attached to the stainless steel pipe through the arrangement of the clamping mechanism, and continuous and stable polishing force is generated, so that the problems that in the prior art, when the pipe diameter of the other part for polishing the stainless steel pipe is smaller than the point, polishing force becomes smaller and not thorough, and when the pipe diameter of the other part for polishing the stainless steel pipe is larger than the point, the polishing force is too large, materials are lost, or the pipe wall strength is influenced, and the polishing wheel is damaged seriously are solved;

2. through the arrangement of the auxiliary clamping part, the functional structure with adjustable clamping force is realized under the condition that the working state of the first spring is not changed, so that the adjustable clamping force of steel pipes with different sizes in different batches is realized, the stainless steel pipes with different specifications are adapted, and the applicability of the polishing machine is stronger;

3. through the setting of supplementary adjustment portion, make things convenient for personnel to supplementary clamping portion adjustment to more convenient realization clamping force is adjustable, and ensured personnel's safety when adjustment mechanism.

Drawings

FIG. 1 is a schematic view of a polishing machine according to an embodiment of the present application;

fig. 2 is a schematic view of a structure in which a driving motor drives a polishing wheel according to an embodiment of the present application;

fig. 3 is a schematic view of a connection part structure of the frame, the clamping mechanism and the abutting mechanism according to the embodiment of the present application.

Reference numerals illustrate: 1. a frame; 11. a first guide hole; 12. a second guide hole; 13. a screw guide hole; 2. a polishing mechanism; 21. a polishing wheel; 22. a driving motor; 23. a driving wheel; 24. a transmission belt; 25. driven wheel; 3. a clamping mechanism; 31. a pinch roller; 32. a first spring; 33. a clamping frame; 34. a first link; 4. an auxiliary supporting seat; 5. an auxiliary clamping part; 51. an auxiliary support rod; 52. a second spring; 53. an auxiliary adjustment section; 531. an auxiliary screw; 532. a gear; 533. briquetting; 534. a synchronous belt; 535. a turntable; 54. a second link; 6. an abutment mechanism; 61. a first motor; 62. a pinch roller; 63. an abutting plate; 7. a support wheel; 8. a handle body; 81. a fixed handle; 82. and a connecting handle.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a stainless steel pipe polishing machine, referring to fig. 1 and 2, comprising a frame 1 and a polishing mechanism 2 arranged on the frame 1, wherein the polishing mechanism 2 comprises a polishing wheel 21, a driven wheel 25, a driving motor 22, a driving wheel 23 and a transmission belt 24, the driving motor 22 is fixed on the frame 1, and the driving wheel 23 is fixed on an output shaft of the driving motor 22; the polishing wheel 21 is connected to the frame 1 through a rotatable bearing, the driven wheel 25 is coaxially fixed on the polishing wheel 21, and the driving belt 24 is in transmission connection with the driving wheel 23 and the driven wheel 25; when the driving motor 22 is electrified, the driving wheel 23 rotates to drive the driving belt 24 to transmit power to the driven wheel 25, so that the driven wheel 25 drives the polishing wheel 21 to rotate together, and the rotation of the polishing wheel 21 is realized.

Referring to fig. 2, the inner side of the driving belt 24 is provided with a strip-shaped protrusion, and the corresponding parts of the driving wheel 23 and the driven wheel 25 are provided with grooves matched with the driving wheel, so that the driving belt 24, the driven wheel 25 and the driving wheel 23 can be kept relatively stable, and the stability of the polishing wheel 21 during rotation is improved.

Referring to fig. 2, the diameter of the driving wheel 23 is larger than that of the driven wheel 25, and the driving wheel 23 and the driven wheel 25 keep the linear speed consistent through the transmission belt 24, so that the angular speed of the driven wheel 25 is larger than that of the driving wheel 23, and the rotation speed of the polishing wheel 21 fixedly connected with the driven wheel 25 is improved.

Referring to fig. 1, the frame 1 is provided with a clamping mechanism 3 connected to the frame 1, and a driving motor 22 drives the polishing wheel 21 remotely through a driving belt 24, so that the driving motor 22 is arranged away from the polishing wheel 21, and a reserved space enables the clamping mechanism 3 to be close to the polishing wheel 21, so that the clamping mechanism 3 and the polishing wheel 21 work in a better matching way.

Referring to fig. 1, the clamping mechanism 3 includes a clamping wheel 31 and a clamping frame 33, the clamping frame 33 is connected to the frame 1 and is located below the polishing wheel 21, the clamping wheel 31 is rotatably connected to the clamping frame 33, the axial line of the clamping wheel 31 extends along a direction perpendicular to the rotation direction of the polishing wheel 21, and a stainless steel tube is placed between the clamping wheel 31 and the polishing wheel 21, so that the clamping wheel 31 guides the stainless steel tube to be conveyed on one side, and the clamping wheel 31 supports the stainless steel tube upwards, so that the stainless steel tube is abutted against the polishing wheel 21.

Referring to fig. 1, the clamping mechanism 3 further includes a first spring 32, one end of the first spring 32 is fixed to the clamping frame 33, and the other end is fixed to the frame 1, and the first spring 32 is located at one side of the polishing wheel 21 and is a compression spring, so that the clamping wheel 31 connected to the clamping frame 33 has a tendency to approach the frame 1; the first spring 32 can generate the pressing force and simultaneously slightly deform to adapt to the diameter of the stainless steel pipe with the size deviation, so that when the same stainless steel pipe outer wall has the size deviation, the clamping wheel 31 provides stable supporting force for the stainless steel pipe at the moment, the polishing wheel 21 is tightly attached to the stainless steel pipe outer wall at the moment, the stable polishing effect is always kept at the size deviation of the same stainless steel pipe, the working condition of self-adapting polishing force is achieved, and the precision of polishing the stainless steel pipe is ensured.

Referring to fig. 1, the clamping mechanism 3 is further provided with a first link 34, the first link 34 is fixed on the clamping frame 33 and penetrates through the first spring 32, the frame 1 is provided with a first guide hole 11, the first link 34 extends and penetrates through the first guide hole 11, the first link 34 is matched with the first guide hole 11, so that the clamping frame 33 only moves vertically relative to the frame 1, meanwhile, the first spring 32 is kept to move vertically, the movement of the clamping mechanism 3 in the horizontal direction caused by the influence of the first spring 32 and other external forces is reduced, and the precision of polishing the stainless steel tube is further improved.

Referring to fig. 1, the clamping mechanism 3 is further provided with an auxiliary clamping portion 5 for adjusting the clamping wheel 31, the auxiliary clamping portion 5 includes an auxiliary supporting rod 51, a second spring 52, and an auxiliary adjusting portion 53, the auxiliary supporting rod 51 is fixed to the clamping frame 33 and located opposite to the first spring 32 with respect to the stainless steel tube, the second spring 52 is fixed above the auxiliary supporting rod 51 and is in a compressed state, so that the second spring 52 has a restoring force when being stretched, and the auxiliary adjusting portion 53 can adjust the length of the second spring 52.

Referring to fig. 1, the auxiliary clamping portion 5 further includes an auxiliary supporting seat 4 and a second link 54, the auxiliary supporting seat 4 is fixed on a side wall of the auxiliary supporting rod 51, the second link 54 is fixed on the auxiliary supporting seat 4, the frame 1 is provided with a second guiding hole 12, the second link 54 extends and passes through the second guiding hole 12, and the second guiding hole 12 cooperates with the second link 54 to enable the second spring 52 to keep stable in a vertical direction, so that the auxiliary clamping wheel 31 clamps the stainless steel tube relative to the polishing wheel 21, and the purpose of improving the precision of polishing the stainless steel tube is achieved.

Referring to fig. 1, the auxiliary adjusting part 53 includes an auxiliary screw 531, a gear 532 and a pressing block 533, the auxiliary screw 531 is fixed above the second spring 52, the frame 1 is provided with a screw guide hole 13, the auxiliary screw 531 passes through the screw guide hole 13 and can move up and down in the screw guide hole 13, the auxiliary screw 531 is kept stable in the horizontal direction, the gear 532 is connected with the auxiliary screw 531 in a threaded fit manner, the pressing block 533 is fixed on the frame 1 and abuts against the gear 532, the gear 532 can rotate relative to the frame 1 and the auxiliary screw 531 can lift relative to the gear 532, when the auxiliary screw 531 drives the upper end of the second spring 52 to move upwards, the second spring 52 is elongated, and the clamping wheel 31 receives the restoring force of the second spring 52 and has a trend of moving upwards, so that the clamping force applied between the polishing wheel 21 and the clamping wheel 31 is increased; when the auxiliary screw 531 drives the upper end of the second spring 52 to move downward, the second spring 52 shortens, and the clamping force applied between the polishing wheel 21 and the clamping wheel 31 becomes smaller, so as to achieve the purpose of adjusting the polishing force.

Referring to fig. 1, the auxiliary adjusting portion 53 further includes a timing belt 534 and a turntable 535, the turntable 535 is rotatably connected to the frame 1, two ends of the timing belt 534 are respectively meshed with the gear 532 and the turntable 535, the turntable 535 rotates, the timing belt 534 drives the gear 532 to rotate, and the auxiliary screw 531 lifts and lowers the length of the second spring 52 relative to the gear 532, so that the polishing force at the clamping wheel 31 is adjusted outside the machine, and the safety of manual operation is ensured.

Referring to fig. 1, a turn table 535 is provided with a handle main body 8, the handle main body 8 comprises a fixed handle 81 and a connecting handle 82, the fixed handle 81 is fixed at the eccentric position above the turn table 535, the fixed handle 81 drives the turn table 535 to rotate, the fixed handle 81 is sleeved and connected to the connecting handle 82, the connecting handle 82 is held to rotate, the turn table 535 can be continuously rotated for a plurality of turns by an arm without reversing, and the convenience in use is improved.

Referring to fig. 3, an abutment mechanism 6 is provided below the frame 1 corresponding to the clamping frame 33, and in an initial state, the clamping frame 33 is far away from the polishing wheel 21 by the abutment mechanism 6, so that the stainless steel tube can be placed more conveniently.

Referring to fig. 3, the abutting mechanism 6 includes a first motor 61, a pressing wheel 62, and an abutting plate 63, the first motor 61 is fixed on the frame 1, the pressing wheel 62 is an eccentric wheel fixed on an output shaft of the first motor 61, the output shaft drives the pressing wheel 62 to rotate, and the abutting plate 63 is fixed on the clamping frame 33 and is located below the pressing wheel 62; when the pinch roller 62 rotates downwards, one side of the pinch roller 62 far away from the axle center continuously presses the abutting plate 63 downwards, the clamping frame 33 moves downwards, the clamping wheel 31 moves downwards along with the clamping frame 33, a gap enough for placing the stainless steel tube is generated between the clamping wheel 31 and the polishing wheel 21, and the stainless steel tube is convenient to feed; when the pressing wheel 62 rotates upwards, one side of the pressing wheel 62 far away from the axis continuously descends, the clamping frame 33 slowly ascends along with the abutting plate 63, so that the pressure generated by the clamping wheel 31 and the polishing wheel 21 slowly increases, and the phenomenon that the stainless steel tube is impacted to deform due to rapid ascending of the clamping wheel 31 under the action of the contraction force of the first spring 32 after the workpiece is fed is avoided.

Referring to fig. 2, a supporting wheel 7 is arranged on the frame 1 and positioned on one side of the clamping wheel 31, and a stainless steel tube is positioned on the supporting wheel 7 and the clamping wheel 31, so that the stability of the stainless steel tube during processing is ensured, and the polishing precision of the stainless steel tube is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a stainless steel pipe burnishing machine, includes frame (1) and locates polishing mechanism (2) on frame (1), its characterized in that: the machine frame (1) is provided with a clamping mechanism (3), the clamping mechanism (3) comprises a clamping wheel (31) movably connected to the machine frame (1), the polishing mechanism (2) comprises a polishing wheel (21) driven by a driving motor (22), a stainless steel tube is positioned between the clamping wheel (31) and the polishing wheel (21), and the clamping wheel (31) and the polishing wheel (21) squeeze the stainless steel tube relatively; an auxiliary clamping part (5) for adjusting the clamping wheel (31) is arranged on the frame (1).

2. A stainless steel pipe polisher according to claim 1, further comprising: the clamping mechanism (3) further comprises a first spring (32), a clamping frame (33) and a first connecting rod (34), wherein the clamping frame (33) supports the clamping wheel (31), one end of the first spring (32) is connected with the clamping frame (33), the other end of the first spring is connected with the frame (1), and the first spring (32) and the polishing wheel (21) are arranged in a staggered mode and are located on one side of the stainless steel tube; the first connecting rod (34) is fixed on the clamping frame (33) and penetrates through the first spring (32), the frame (1) is provided with a first guide hole (11), and the first connecting rod (34) extends and penetrates through the first guide hole (11).

3. A stainless steel pipe polisher according to claim 2, further characterized by: the auxiliary clamping part (5) comprises an auxiliary supporting rod (51), a second spring (52) and an auxiliary adjusting part (53), wherein the auxiliary supporting rod (51) is fixed on the other side of the clamping frame (33) opposite to the first spring (32), the second spring (52) is fixed above the auxiliary supporting rod (51), the auxiliary adjusting part (53) comprises an auxiliary screw (531) which is connected onto the frame (1) in a lifting manner, the auxiliary screw (531) is fixed above the second spring (52), the frame (1) is provided with a screw guide hole (13), and the auxiliary screw (531) penetrates through the screw guide hole (13).

4. A stainless steel pipe polisher according to claim 3, further characterized by: the auxiliary adjusting part (53) further comprises a gear (532), a pressing block (533), a synchronous belt (534) and a rotary table (535), the gear (532) is connected with the auxiliary screw (531) in a threaded fit mode, the pressing block (533) is fixed on the rack (1) and is abutted to the gear (532), the gear (532) rotates relative to the rack (1), the rotary table (535) is rotationally connected to the rack (1), two ends of the synchronous belt (534) are respectively meshed with the gear (532) and the rotary table (535), the rotary table (535) rotates, and the synchronous belt (534) drives the gear (532) to rotate.

5. A stainless steel pipe polisher according to claim 3, further characterized by: the auxiliary clamping part (5) further comprises an auxiliary supporting seat (4) and a second connecting rod (54), the auxiliary supporting seat (4) is fixed on the side wall of the auxiliary supporting rod (51), the second connecting rod (54) is fixed on the auxiliary supporting seat (4), the frame (1) is provided with a second guide hole (12), and the second connecting rod (54) extends and penetrates through the second guide hole (12).

6. A stainless steel pipe polisher according to claim 1, further comprising: the machine frame (1) is provided with an abutting mechanism (6), the abutting mechanism (6) comprises a first motor (61), a pressing wheel (62) and an abutting plate (63), the first motor (61) is fixed on the machine frame (1), the pressing wheel (62) is an eccentric wheel and is fixed on an output shaft of the first motor (61), and the abutting plate (63) is fixed on the clamping frame (33) and is positioned below the pressing wheel (62); the pinch roller (62) rotates downwards to press the abutting plate (63), and the abutting plate (63) and the clamping frame (33) move downwards.

7. A stainless steel pipe polisher according to claim 1, further comprising: the polishing mechanism (2) further comprises a driving wheel (23), a transmission belt (24) and a driven wheel (25), wherein the driving motor (22) is fixed on the frame (1), the driving wheel (23) is fixed on an output shaft of the driving motor (22), the driven wheel (25) is fixed on the polishing wheel (21), the driving wheel (23) and the driven wheel (25) are located on the same plane, and the transmission belt (24) is in transmission connection with the driving wheel (23) and the driven wheel (25).

8. A stainless steel pipe polisher according to claim 1, further comprising: the stainless steel tube clamping machine is characterized in that a supporting wheel (7) is arranged on the frame (1) and located on one side of the clamping wheel (31), and the stainless steel tube is located on the supporting wheel (7) and the clamping wheel (31).

9. A stainless steel pipe polisher according to claim 4, further comprising: the rotary table (535) is provided with a handle main body (8), the handle main body (8) comprises a fixed handle (81) and a connecting handle (82), the fixed handle (81) is fixed at the eccentric position above the rotary table (535), the fixed handle (81) drives the rotary table (535) to rotate, and the connecting handle (82) is sleeved and connected to the fixed handle (81).