CN113217581B

CN113217581B - Speed reducer for circular sawing machine stable in operation

Info

Publication number: CN113217581B
Application number: CN202110490548.9A
Authority: CN
Inventors: 汪德杰; 潘晓峰; 吕振鑫; 陈国龙; 钭俊维
Original assignee: ZHEJIANG GUANBAO INDUSTRIAL CO LTD
Current assignee: ZHEJIANG GUANBAO INDUSTRIAL CO LTD
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2022-06-14
Anticipated expiration: 2041-05-06
Also published as: CN113217581A

Abstract

The invention relates to a speed reducer for a circular saw, which runs stably, and is additionally provided with a friction ring and a friction assembly on the basis of the conventional speed reducer, wherein the friction ring and the friction assembly generate a resistance to absorb shock of a blade connected with the speed reducer, and simultaneously, the transmission clearance of each gear in a shell can be reduced, and the transmission precision of the speed reducer is improved.

Description

Speed reducer capable of running stably and used for circular saw

Technical Field

The invention relates to a speed reducer for a circular saw, which runs stably.

Background

A speed reducer, i.e., a speed reducer, is a device that functions to match rotational speed and transmit torque between a prime mover and an actuator, and is widely used in modern machinery. In the circular sawing machine, the speed reducer is used for driving the blade to cut, when the circular sawing machine cuts a workpiece, the blade can vibrate and is in a vibration state for a long time to cut, the service life of the blade can be shortened, even the blade is broken, the speed reducer can accelerate the abrasion between gears under the vibration of the blade, the gear clearance is enlarged, the transmission precision is reduced, and therefore the prior speed reducer is necessary to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the speed reducer for the circular saw, which can effectively solve the problem of blade vibration through the matching of the friction block and the friction ring, can automatically replace the friction block, has long service life and high automation degree, and runs stably.

The technical scheme of the invention is realized as follows: the utility model provides a speed reducer for circular saw that operation is stable, includes casing, input shaft, output shaft, establishes the reduction gears between input shaft and output shaft, input shaft, output shaft, reduction gears all establish in the casing its characterized in that: the improved transmission device is characterized in that a reduction gear is arranged on the output shaft, a transmission shaft is arranged on one side of the output shaft and is rotatably connected with the shell, a transmission gear is arranged at a position, opposite to the reduction gear, on the transmission shaft and meshed with the transmission gear, one end of the transmission shaft penetrates through the inner wall of the shell and then extends to the outside of the shell, a friction ring is arranged at one end, located at the outside of the shell, of the transmission shaft, and a friction assembly used for contacting with the friction ring to transmit rotation resistance to the transmission shaft is arranged on one side of the friction ring.

By adopting the technical scheme, the input shaft is connected with an external motor to transmit power, the speed reducing mechanism is mainly formed by meshing multi-stage gears, under the speed reducing action of the speed reducing mechanism, power with lower rotating speed and higher torque is output from the output shaft, the speed reducing gear is coaxially arranged on the output shaft, the transmission shaft and the output shaft are arranged in the shell in parallel, the transmission gear and the transmission shaft are coaxially arranged, the speed reducing gear rotates along with the output shaft, the speed reducing gear is meshed with the transmission gear to drive the transmission shaft to rotate, the friction ring is coaxially connected with the transmission shaft through the fixing sleeve, the transmission shaft drives the friction ring to rotate, the friction assembly is arranged on one side of the friction ring, the surface of the friction ring is rough, the friction assembly can be in surface contact with the friction ring to form a resistance, the friction ring transmits the resistance to the transmission shaft and then transmits the resistance to the output shaft through the meshing transmission gear and the speed reducing gear, and the output shaft is transmitted to the speed reducing mechanism step by step through the speed reducing gear, so that the transmission clearance of each gear in the shell can be reduced, the vibration of the blade is reduced, and the transmission precision of the speed reducer is improved.

The invention is further configured to: the friction assembly comprises two friction blocks and two swinging blocks, the two swinging blocks are arranged in parallel, the middle parts of the swinging blocks are hinged to each other, pressure springs are arranged at the hinged positions of the two swinging blocks, the two friction blocks are fixed at the ends, close to the friction ring, of the two swinging blocks respectively, the two friction blocks are located on one sides, opposite to each other, of the two swinging blocks, the friction ring is located between the two friction blocks, one end, far away from the friction ring, of the swinging block is provided with a driving assembly used for driving the two ends, close to the friction ring, of the swinging blocks, and the driving assembly rotates in opposite directions by taking a hinged point as a fulcrum.

Through adopting above-mentioned technical scheme, the friction ring is located the intermediate position between two swing pieces, two swing pieces pass through the dwang and rotate the connection, the cover is equipped with pressure spring on the dwang, two swing pieces can use the dwang to rotate as the fulcrum relatively under drive assembly's effect, one side that the friction piece is close to the friction ring is wear-resisting piece, the friction piece passes through wear-resisting piece and friction ring surface contact transmission resistance, when two swing pieces parallel, pressure spring is in the state of relaxing, when friction piece and friction ring contact, pressure spring is in the state of compressing tightly, drive assembly removes behind the drive power, two swing pieces can reset under pressure spring's elastic force effect.

The invention is further configured to: the drive assembly comprises an electric cylinder, a push block and a drive plate, the push block is fixedly connected with a piston rod of the electric cylinder, the push block is fixedly connected with the piston rod of the electric cylinder, the drive plate is arranged at one end, away from the friction ring, of the swing block, the side wall, close to the push block, of one end of the drive plate is an inclined plane, the two ends of the push block are respectively in contact with the two drive plates, the friction block is detachably connected onto the swing block through a vacuum adsorption assembly, an installation shell is arranged on one side of the swing block, and an accurate conveying assembly used for conveying the new friction block to the connection position of the friction block and the swing block is arranged in the installation shell.

By adopting the technical scheme, the electric cylinder is arranged at one end of the swinging block, which is far away from the friction ring, the side wall of one side, which is opposite to the two driving plates, is an inclined plane, the inclined plane is positioned at one end of the driving plates, one end, which is far away from the inclined plane, of the driving plates is fixedly connected with the side wall of one end, which is far away from the friction ring, of the swinging block, two ends of the push plate are respectively contacted with the inclined plane parts of the two driving plates, a piston rod of the electric cylinder is fixedly connected with the middle part of the push plate, the electric cylinder drives the piston rod to move so that the push plate can move along the inclined plane of the driving plates, when the push plate moves towards the direction close to the friction ring, the two driving plates push the two driving plates towards the direction far away from each other, the driving plates drive the two swinging blocks to rotate oppositely so that the friction block is close to the friction ring, the friction block is detachably connected with the swinging block, so that the friction block can be replaced under the condition of serious abrasion of the friction block, and the friction ring can be continuously and normally contacted to generate resistance, the vacuum adsorption component adsorbs the friction block through vacuum suction, is healthy and environment-friendly, can not produce wastes, and is convenient to install and disassemble.

The invention is further configured to: the accurate conveying assembly comprises a driving motor, a first gear, a sliding rod, a first rack, a limiting block, a guide sleeve and two placing plates, wherein a mounting groove is formed in the mounting shell, the sliding rod is arranged in the mounting groove in a sliding mode, the driving motor is located at one end, far away from the friction ring, of the sliding rod, the first gear is coaxially connected with a driving output shaft of the driving motor, a first rack is arranged on the side wall, close to one end of the first gear, of the sliding rod, the first rack is arranged along the length direction of the sliding rod, the first gear is meshed and connected with the first rack, the limiting block is fixed in the mounting groove and can be in contact with the first rack to limit the movement of the sliding rod, the guide sleeve is fixed in the mounting groove and used for guiding the sliding rod, the two placing plates are arranged at one end, far away from the driving motor, of the sliding rod in parallel, one side of the placing plates is provided with a storage pushing assembly used for storing a new friction block and pushing the new friction block onto the placing plates, one side of placing keeping away from on the board and storing propelling movement subassembly is equipped with the baffle, the slide bar with place and be equipped with the supplementary slip subassembly that is used for improving the slide bar and slides in the same direction as the smoothness degree between the board, the installation shell is close to and is equipped with the delivery port on the lateral wall of placing board one side, delivery port and mounting groove intercommunication.

By adopting the technical scheme, the driving motor, the first gear, the sliding rod, the first rack, the limiting block and the guide sleeve are all positioned in the mounting groove, the driving motor and one end which is fixed in the mounting groove and is far away from the friction ring are coaxially fixed with the output shaft of the driving motor, one end of the mounting groove, which is close to the driving motor, penetrates through the outer side wall of the mounting shell, the first rack is fixed on the side wall of one side, which is close to the first gear, of the sliding rod, the sliding rod and the first rack can extend to the outside of the mounting shell, the limiting block is fixed in the mounting groove, the limiting block can be arranged on one side of the sliding rod and can also be provided with a through hole for the sliding rod to pass through, the limiting rod achieves the function that when one end of the first rack is contacted with the limiting block, the driving motor stops, the sliding rod reaches the limit position at the moment, the guide sleeve is fixed in the mounting groove and is positioned in the middle of the sliding rod, the guide sleeve is hollow inside, the shape of the inner section of the guide sleeve is matched with that of the sliding rod, the sliding rod penetrates through the guide sleeve, the guide sleeve can play a role of guiding the sliding of the sliding rod, the sliding rod is prevented from being deviated in the direction in the sliding process, the stability in the sliding process of the sliding rod is improved, the sliding of the sliding rod is smoother by arranging an auxiliary sliding assembly while guiding the sliding rod, two placing plates are arranged on two sides of one end, far away from a driving motor, of the sliding rod in parallel, the two placing plates respectively correspond to the positions of the friction blocks arranged on the two swinging blocks, two groups of storage pushing assemblies are arranged and are respectively arranged on one side of the two placing plates, the two storage pushing assemblies can be designed in a mounting groove or outside a mounting shell, the new friction blocks can be pushed to the upper surface of the placing plates through the storage pushing assemblies, and the baffle is arranged on one side of the upper surface of the placing plates, when a new friction block is contacted with the baffle, the friction block is pushed by the storage pushing assembly, the storage pushing assembly is reset at the moment, the driving motor is started to drive the first gear to rotate, the first gear and the first rack are meshed for transmission to drive the sliding rod to slide towards the direction close to the friction ring, the sliding rod drives the two placing plates and the new friction block to leave the mounting groove through the output port and close to the mounting position of the friction block on the swinging block, when the sliding rod reaches the limit position, the placing plates carry the new friction block to the mounting position, the vacuum adsorption assembly tightly adsorbs the new friction block, after the new friction block is mounted, the driving motor drives the first gear to rotate reversely, the first gear and the first rack are matched with each other to drive the sliding rod to slide towards the direction away from the friction ring, the sliding rod drives the two placing plates to return to the mounting groove, and the placing plates are stored in the mounting groove in the reset state, the placing plate is protected.

The invention is further configured to: supplementary slip subassembly includes fixed block, second gear, second rack, driving motor's one end and fixed block lateral wall fixed connection are kept away from to the slide bar, one side that the slide bar was kept away from to the fixed block is equipped with the mounting panel, two place the board and fix the both sides at the mounting panel, the second gear rotates to be connected on the fixed block lateral wall, the second rack is fixed on the mounting groove lateral wall along slide bar length direction, the second gear is connected with the meshing of second rack.

By adopting the technical scheme, the length direction of the fixed block is the same as that of the sliding rod, one end of the sliding rod is fixedly connected with the side wall of one end of the fixed block through the fastener, the mounting plate is fixed at one end of the fixed block far away from the sliding rod through the fastener, the two placing plates are fixed at two sides of the surface of one side of the mounting plate far away from the fixed block, the second gear is rotatably arranged on one side wall of the fixed block through a rotating shaft, the second rack is arranged at the position in the mounting groove opposite to the second gear, and the second gear is mutually meshed with the second rack, so that the second gear is meshed with and rotates on the second rack in the sliding process of the sliding rod, the pressure of the first gear and the first rack is reduced, preferably, the second rack and the first rack are respectively arranged at two sides opposite to the sliding rod, so that the second gear is matched with the second rack to reduce the pressure of the first gear and the first rack, meanwhile, the sliding rod can be guided, and the sliding stability of the sliding rod is further improved.

The invention is further configured to: store propelling movement subassembly including propelling movement cylinder, bottom plate, push plate, four locating levers, four the locating lever distributes in bottom plate four angle departments with one side, the push plate is located between four locating levers, and with bottom plate parallel arrangement, the push plate can be followed locating lever length direction and slided, the propelling movement cylinder is located one side that the locating lever was kept away from to the bottom plate, be equipped with the through hole on the bottom plate, the piston rod of propelling movement cylinder passes behind the through hole and is close to the lateral wall fixed connection of bottom plate one side with the push plate, one side that the bottom plate was kept away from to the push plate is used for storing new clutch blocks.

Through adopting above-mentioned technical scheme, propelling movement cylinder and bottom plate all with mounting groove lateral wall fixed connection, the length homogeneous phase of four locating levers, all be equipped with an inner groovy on the relative inner wall of four locating levers, this inner groovy runs through the locating lever along locating lever length direction, form the space of putting of new clutch blocks between four locating levers, four angles of new clutch blocks are in four inner groovies respectively, the propelling movement board slides and sets up between four locating levers, when propelling movement new clutch blocks, the piston rod that the propelling movement cylinder starts to drive on it drives the propelling movement board and promotes new clutch blocks.

The invention is further configured to: the vacuum adsorption subassembly includes real empty room, air exhaust device, real empty room is established in the swing piece and is located the one end that is close to the friction ring, be equipped with bleed passage and pressure release passageway on the real empty room inner wall, air exhaust device is connected with bleed passage, pressure release passageway and atmosphere intercommunication, be equipped with the first control valve that is used for controlling whether bleed passage switches on in the bleed passage, be equipped with the second control valve that is used for controlling whether pressure release passageway switches on in the pressure release passageway, be equipped with the air guide hole on the relative lateral wall of swing piece and friction block, air guide hole and real empty room intercommunication.

By adopting the technical scheme, the vacuum chamber can be arranged at any position in the swinging block, certainly, in order to ensure the fixing effect of the friction block, the length of the air guide hole should be as small as possible, therefore, preferably, the vacuum chamber is positioned at one end of the swinging block close to the friction ring, the air extracting device can be any equipment capable of extracting air, the air extracting device is fixed at one side of the swinging block, an exhaust pipe of the air extracting device is hermetically connected with an air extracting channel, a first control valve is arranged between the exhaust pipe and the air extracting channel, the air extracting channel is used for being communicated with the external atmosphere, a second control valve is arranged in the air extracting channel, when the friction block needs to be absorbed, the second control valve is in a closed state to close the air extracting channel, the first control valve is opened to conduct the air extracting channel, the friction block is contacted with one end of the air guide hole, the air extracting device is started, the air extracting device extracts air in the vacuum chamber, and the vacuum chamber is in a vacuum state, vacuum pressure in the vacuum chamber at this moment tightly holds the clutch blocks through the gas guide hole, in order to guarantee good vacuum environment, close first control valve earlier after the completion of bleeding, close air exhaust device again, first control valve and second control valve can be through connecting outside single chip microcomputer control, fix the clutch blocks through the vacuum adsorption subassembly, need not punch or design other structures at the clutch blocks surface and come fixed cooperation, also can not use the back like glue and remain the discarded object that is difficult to get rid of at the clutch blocks surface, make the clutch blocks of wearing and tearing can be easily retrieved and recycled.

The invention is further configured to: the air guide holes are distributed at intervals along the side wall of the swinging block, and the distribution area of the air guide holes is smaller than that of the side wall of the friction block.

Through adopting above-mentioned technical scheme, in order to guarantee vacuum chamber's vacuum effect, simultaneously in order to improve the fixed stability of clutch blocks, design the form into a plurality of apertures with the air guide hole, a plurality of air guide hole interval distribution for each position of the lateral wall of clutch blocks can receive the effect of vacuum suction more equallyly.

The invention also discloses a use method suitable for the speed reducer, which is characterized by comprising the following steps of: .

S1, normal operation: the speed reducer works, the speed reduction gear drives the transmission gear to rotate, the transmission gear drives the transmission shaft to rotate, the transmission shaft drives the friction ring to rotate, the electric cylinder is started to drive a piston rod on the electric cylinder to push the push block towards the direction close to the friction ring, two ends of the push block respectively push the two driving plates to enable one ends of the two swing blocks close to the friction ring to rotate oppositely and simultaneously extrude the pressure spring, and the swing blocks drive the two friction blocks to be in contact with the friction ring in the opposite rotation process;

s2, replacing the friction block: when the friction blocks are seriously worn, the speed reducer stops working, the electric air cylinder starts to drive a piston rod on the electric air cylinder to drive the push block to move towards the direction far away from the friction ring, the elastic force of the pressure spring pushes one ends of the two swing blocks close to the friction ring outwards to enable the two friction blocks to be far away from the friction ring, then the vacuum adsorption component executes a releasing action to release the damaged friction blocks, the damaged friction blocks fall off, the storage pushing component executes a pushing action to push the new friction blocks to the accurate conveying component, the accurate conveying component executes a conveying action to convey the new friction blocks to the joints of the friction blocks and the swing blocks, and the vacuum adsorption component executes an adsorption action to fix the new friction blocks;

wherein the releasing action comprises: the first control valve is in a closed state, the second control valve is opened, the atmosphere is communicated with the vacuum chamber, the air pressure in the vacuum chamber is the same as the atmospheric pressure, and the friction block falls;

the pushing action comprises: the pushing cylinder is started to drive a piston rod on the pushing cylinder to drive the pushing plate to move, the pushing plate moves towards the direction far away from the bottom plate to push a new friction block to the placing plate, and when the new friction block is in contact with the baffle, the pushing cylinder drives the piston rod on the pushing cylinder to move in the opposite direction to retract the pushing plate;

the conveying action comprises: the driving motor is started to drive the first gear to rotate, the first gear and the first rack are matched with each other to drive the sliding rod to move towards the direction close to the friction ring, the sliding rod drives the two placing plates to move through the fixing block and the mounting plate, the placing plates drive the new friction block to be close to the swinging block, when one end of the first rack is in contact with the limiting block, the driving motor stops, the placing plates reach the connecting position of the friction block and the swinging block at the moment, and the new friction block is in contact with the outer end of the air guide hole;

the adsorption action includes: the second control valve is closed, the first control valve is opened, the air extractor is started to extract air in the vacuum chamber, the vacuum pressure in the vacuum chamber tightly sucks the friction block through the air guide hole, finally the vacuum chamber is in a vacuum state, at the moment, the first control valve is closed, and then the air extractor is closed.

By adopting the technical scheme, under the normal operation of the speed reducer, the first control valve is in a closed state, the second control valve is in a closed state, the vacuum chamber is in a vacuum state, the friction block and the friction ring are matched with each other to generate resistance at the moment, when the friction block is seriously worn, the speed reducer stops working, the two swing blocks return to the original positions, the vacuum adsorption component executes release action, the friction block is not absorbed at the moment, the friction block freely falls under the action of gravity, the recovery frame can be arranged below the friction block to recover the worn friction block, the new friction block is pushed onto the placing plate by the storage pushing component in the process, the driving motor starts to drive the first gear to be meshed with the first rack to drive the sliding rod to move, the sliding rod drives the placing plate to convey the new friction block to the mounting position, the vacuum adsorption component executes adsorption action to fix the new friction block, the wear condition of the wear block and the contact between the new friction block and the baffle can be detected by the sensor, compared with the prior art, the invention can generate resistance through the mutual matching of the friction block and the friction ring to relieve the vibration of the blade in the cutting process, and meanwhile, the friction block is replaced through a reasonably designed structure to prolong the service life of the speed reducer.

The invention is further configured to: and a door body for opening and closing the mounting groove is arranged on the side wall of the mounting shell at a position opposite to the storage pushing assembly.

Through adopting above-mentioned technical scheme, open the door body and can carry out the storage of new clutch blocks, new clutch blocks all stores between four locating levers, and the wearing and tearing cycle of clutch blocks is longer, consequently only need store two to three new clutch blocks can, store the length of the also can minimize locating lever of a small amount of new clutch blocks simultaneously, reduce the volume of storing the propelling movement subassembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of the present invention, in which an air-extracting device is omitted.

Fig. 2 is a schematic structural diagram of a precision conveying assembly according to an embodiment of the present invention.

Fig. 3 is a schematic diagram showing the position distribution of the friction assembly, the driving assembly and the mounting housing according to the embodiment of the present invention.

Fig. 4 is a schematic view of a part a of the enlarged structure in fig. 1.

Fig. 5 is a schematic view of a part of the enlarged structure at B in fig. 4.

Fig. 6 is a schematic view of a part of the enlarged structure at C in fig. 2.

Fig. 7 is a schematic diagram of a distribution structure of four positioning rods according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a door according to an embodiment of the present invention.

The labels in the figures are:

1-shell, 2-input shaft, 3-output shaft, 4-reduction gear, 5-transmission shaft, 6-transmission gear, 7-friction ring, 8-friction component, 801-friction block, 802-swinging block, 803-pressure spring, 901-electric cylinder, 902-push block, 903-drive plate, 904-mounting shell, 1001-drive motor, 1002-first gear, 1003-sliding rod, 1004-first rack, 1005-limiting block, 1006-guide sleeve, 1007-placing plate, 1008-baffle plate, 1009-conveying port, 1101-fixing block, 1102-second gear, 1103-second rack, 1104-mounting plate, 1201-push cylinder, 1202-bottom plate, 1203-push plate, 1204-positioning rod, 1205-through hole, 1301-vacuum chamber, 1302-air exhaust channel, 1303-pressure relief channel, 1304-first control valve, 1305-second control valve, 1306-air vent, 14-door body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-8, the present invention discloses a speed reducer for a circular saw, which runs stably, and comprises a housing 1, an input shaft 2, an output shaft 3, and a speed reducing mechanism arranged between the input shaft 2 and the output shaft 3, wherein the input shaft 2, the output shaft 3, and the speed reducing mechanism are all arranged in the housing 1, in the specific embodiment of the present invention: be equipped with reduction gear 4 on the output shaft 3, 3 one sides of output shaft are equipped with transmission shaft 5, transmission shaft 5 rotates with casing 1 to be connected, the position relative with reduction gear 4 on the transmission shaft 5 is equipped with drive gear 6, reduction gear 4 is connected with drive gear 6 meshing, 5 one end of transmission shaft runs through and extends to the casing 1 outside behind the 1 inner wall of casing, the one end that transmission shaft 5 is located the casing 1 outside is equipped with friction ring 7, thereby 7 one side of friction ring is equipped with and is used for transmitting a rotational resistance's for transmission shaft 5 friction pack 8 with friction ring 7 contact.

By adopting the technical scheme, the input shaft 2 is connected with an external motor to transmit power, the speed reducing mechanism is mainly formed by meshing multi-stage gears, under the speed reducing action of the speed reducing mechanism, power with lower rotating speed and higher torque is output from the output shaft 3, the speed reducing gear 4 is coaxially arranged on the output shaft 3, the transmission shaft 5 and the output shaft 3 are arranged in the shell 1 in parallel, the transmission gear 6 is coaxially arranged with the transmission shaft 5, the speed reducing gear 4 rotates coaxially with the output shaft 3, the speed reducing gear 4 is meshed with the transmission gear 6 to drive the transmission shaft 5 to rotate, the friction ring 7 is coaxially connected with the transmission shaft 5 through a fixing sleeve, the transmission shaft 5 drives the friction ring 7 to rotate, the friction assembly 8 is arranged on one side of the friction ring 7, the surface of the friction ring 7 is rough, the friction assembly 8 can be in surface contact with the friction ring 7 to form resistance, and the friction ring 7 transmits the resistance to the transmission shaft 5, and then the transmission is transmitted to the output shaft 3 through the meshing transmission of the transmission gear 6 and the reduction gear 4, and then the output shaft 3 is transmitted to the reduction mechanism step by step through the reduction gear 4, so that the transmission clearance of each gear in the shell 1 can be reduced, the vibration of the blade is reduced, and the transmission precision of the speed reducer is improved.

In a specific embodiment of the invention: the friction assembly 8 comprises two friction blocks 801, two swinging blocks 802 and two swinging blocks 802 which are arranged in parallel, wherein the middle parts of the swinging blocks 802 are hinged with each other, a pressure spring 803 is arranged at the hinged position of the two swinging blocks 802, the friction blocks 801 are fixed at one ends, close to the friction ring 7, of the two swinging blocks 802 respectively, and the friction blocks 801 are located on one sides, opposite to the two swinging blocks 802, of the two swinging blocks 802, the friction ring 7 is located between the two friction blocks 801, one end, far away from the friction ring 7, of the swinging blocks 802 is provided with a driving assembly for driving the two ends, close to the friction ring 7, of the swinging blocks 802 to rotate in opposite directions by taking a hinged point as a fulcrum.

Through adopting above-mentioned technical scheme, friction ring 7 is located the intermediate position between two swing pieces 802, two swing pieces 802 rotate through the dwang and connect, the cover is equipped with pressure spring 803 on the dwang, two swing pieces 802 can use the dwang to rotate as the fulcrum relatively under drive assembly's effect, one side that friction piece 801 is close to friction ring 7 is wear-resisting piece, friction piece 801 passes through wear-resisting piece and friction ring 7 surface contact transmission resistance, when two swing pieces 802 parallel, pressure spring 803 is in the relaxed state, when friction piece 801 and friction ring 7 contact, pressure spring 803 is in the state of compressing tightly, after drive assembly removed drive power, two swing pieces 802 can reset under pressure spring 803's elasticity effect.

In a specific embodiment of the invention: the driving assembly comprises an electric cylinder 901, a push block 902 and driving plates 903, the push block 902 is fixedly connected with a piston rod of the electric cylinder 901, the driving plates 903 are arranged at one ends, far away from the friction ring 7, of the two swinging blocks 802, the side walls, close to the push block 902, of the driving plates 903 are inclined, the two ends of the push block 902 are respectively in contact with the two driving plates 903, the friction block 801 is detachably connected onto the swinging blocks 802 through a vacuum adsorption assembly, an installation shell 904 is arranged on one side of each swinging block 802, and an accurate conveying assembly used for conveying the new friction block 801 to the connection position of the friction block 801 and the swinging block 802 is arranged in the installation shell 904.

By adopting the technical scheme, the electric cylinder 901 is arranged at one end of the swinging block 802 far away from the friction ring 7, the side wall of one side of the two driving plates 903 opposite to each other is an inclined surface, the inclined surface is positioned at one end of the driving plates 903, one end of the driving plates 903 far away from the inclined surface is fixedly connected with the side wall of one end of the swinging block 802 far away from the friction ring 7, two ends of the push plate are respectively contacted with the inclined surface parts of the two driving plates 903, a piston rod of the electric cylinder 901 is fixedly connected with the middle part of the push plate, the electric cylinder 901 drives the piston rod to move so that the push plate can move along the inclined surface of the driving plates 903, when the push plate moves towards the direction close to the friction ring 7, two ends of the push plate push the two driving plates 903 towards the far away direction, the driving plates 903 drive the two swinging blocks 802 to rotate oppositely to enable the friction block 801 to be close to the friction ring 7, the friction block 801 is detachably connected with the swinging block 802, so as to be convenient for replacing the friction block 801 under the serious abrasion condition, guarantee that clutch blocks 801 and friction ring 7 can last normal contact and produce the resistance, the vacuum adsorption subassembly is through vacuum suction hold clutch blocks 801, and is healthy environmental protection, can not produce the discarded object, and the installation is dismantled conveniently.

In a specific embodiment of the invention: the precise conveying assembly comprises a driving motor 1001, a first gear 1002, a sliding rod 1003, a first rack 1004, a limiting block 1005, a guide sleeve 1006 and two placing plates 1007, wherein an installation groove is formed in the installation shell 904, the sliding rod 1003 is arranged in the installation groove in a sliding mode, the driving motor 1001 is located at one end, far away from the friction ring 7, of the sliding rod 1003, the first gear 1002 is coaxially connected with a driving output shaft of the driving motor 1001, a first rack 1004 is arranged on the side wall, close to one end of the first gear 1002, of the sliding rod 1003, the first rack 1004 is arranged along the length direction of the sliding rod 1003, the first gear 1002 is meshed with the first rack 1004, the limiting block 1005 is fixed in the installation groove and can be in contact with the first rack 1004 to limit the movement of the sliding rod 1003, the guide sleeve 1006 is fixed in the installation groove and used for guiding the sliding rod 1003, and the two placing plates 1007 are arranged at one end, far away from the driving motor 1001, of the sliding rod 1003 in parallel, place board 1007 one side and be equipped with and be used for storing new clutch blocks 801 and can push away new clutch blocks 801 to the storage propelling movement subassembly of placing on the board 1007, the one side of keeping away from on placing the board 1007 and storing the propelling movement subassembly is equipped with baffle 1008, slide bar 1003 and place and be equipped with the supplementary slip subassembly that is used for improving the slide bar 1003 slip smoothness between the board 1007, installation shell 904 is close to and is equipped with transport opening 1009 on the lateral wall of placing board 1007 one side, transport opening 1009 and mounting groove intercommunication.

By adopting the technical scheme, the driving motor 1001, the first gear 1002, the sliding rod 1003, the first rack 1004, the limiting block 1005 and the guide sleeve 1006 are all positioned in the mounting groove, the driving motor 1001 and one end which is fixed in the mounting groove and is far away from the friction ring 7, the first gear 1002 and a driving output shaft of the driving motor 1001 are coaxially fixed, one end of the mounting groove which is close to the driving motor 1001 penetrates through the outer side wall of the mounting shell 904, the first rack 1004 is fixed on the side wall of the sliding rod 1003 which is close to the first gear 1002, the sliding rod 1003 and the first rack 1004 can extend to the outside of the mounting shell 904, the limiting block 1005 is fixed in the mounting groove, the limiting block 1005 can be arranged on one side of the sliding rod 1003, or a through hole can be arranged on the limiting block 1005 for the sliding rod to pass through, the limiting rod realizes the function that when one end of the first rack 1004 is contacted with the limiting block 1005, the driving motor 1001 stops, and the sliding rod 1003 reaches the limit position, the guide sleeve 1006 is fixed in the installation groove and located at the middle position of the sliding rod 1003, the guide sleeve 1006 is hollow inside, the shape of the inner section of the guide sleeve 1006 is matched with that of the sliding rod 1003, the sliding rod 1003 penetrates through the interior of the guide sleeve 1006, the guide sleeve 1006 can play a role in guiding the sliding of the sliding rod 1003, the sliding rod 1003 is prevented from deviating in the sliding process, the stability of the sliding process of the sliding rod 1003 is improved, the sliding of the sliding rod 1003 is enabled to be smoother by arranging an auxiliary sliding assembly while the sliding rod 1003 is guided, two placing plates 1007 are arranged on two sides of one end of the sliding rod 1003 far away from the driving motor 1001 in parallel, the two placing plates 1007 respectively correspond to the positions of the friction blocks 801 on the two swinging blocks 802, two groups of storage pushing assemblies are respectively located on one side of the two placing plates 1007, the two storage pushing assemblies can be designed in the installation groove and can also be designed outside the installation shell 904, the new friction block 801 can be pushed to the upper surface of the placing plate 1007 by the storage pushing assembly, the baffle 1008 is arranged on one side of the upper surface of the placing plate 1007, when the new friction block 801 is in contact with the baffle 1008, the storage pushing assembly pushes the friction block 801 to be completed, the storage pushing assembly is reset at the moment, the driving motor 1001 is started to drive the first gear 1002 to rotate, the first gear 1002 is meshed with the first rack 1004 to drive the sliding rod 1003 to slide towards the direction close to the friction ring 7, the sliding rod 1003 drives the two placing plates 1007 and the new friction block 801 to leave the mounting groove through the output port and close to the mounting position of the friction block 801 on the swinging block 802, when the sliding rod 1003 reaches the limit position, the placing plate 1007 carries the new friction block 801 to reach the mounting position, the vacuum adsorption assembly tightly adsorbs the new friction block 801, and after the new friction block 801 is mounted, the driving motor 1001 drives the first gear 1002 to reversely rotate, first gear 1002 mutually supports with first rack 1004 and drives slide bar 1003 towards keeping away from the slip ring 7 direction and slide, and slide bar 1003 takes two to place board 1007 and returns to the mounting groove in, place board 1007 and accomodate in the mounting groove under the reset state, has carried out a protection to placing board 1007.

The invention is further configured to: the auxiliary sliding assembly comprises a fixing block 1101, a second gear 1102 and a second rack 1103, one end, far away from the driving motor 1001, of the sliding rod 1003 is fixedly connected with the side wall of the fixing block 1101, a mounting plate 1104 is arranged on one side, far away from the sliding rod 1003, of the fixing block 1101, two placing plates 1007 are fixed on two sides of the mounting plate 1104, the second gear 1102 is rotatably connected to the side wall of the fixing block 1101, the second rack 1103 is fixed on the side wall of the mounting groove along the length direction of the sliding rod 1003, and the second gear 1102 is in meshed connection with the second rack 1103.

By adopting the above technical scheme, the length direction of the fixed block 1101 is the same as the length direction of the sliding rod 1003, one end of the sliding rod 1003 is fixedly connected with the side wall of one end of the fixed block 1101 through a fastener, the mounting plate 1104 is fixed at one end of the fixed block 1101 far away from the sliding rod 1003 through a fastener, the two placing plates 1007 are fixed at two sides of the side surface of the mounting plate 1104 far away from the fixed block 1101, the second gear 1102 is rotatably arranged on one side wall of the fixed block 1101 through a rotating shaft, the second rack 1103 is arranged in the mounting groove at a position opposite to the second gear 1102, the second gear 1102 is meshed with the second rack 1103, so that the second gear 1102 is meshed with the second rack 1103 to rotate during the sliding process of the sliding rod 1003, the pressure between the first gear 1002 and the first rack 1004 is reduced, preferably, the second rack 1103 and the first rack 1004 are respectively arranged at two sides opposite to the sliding rod 1003, so that the second gear 1102 and the second rack 1103 can not only reduce the pressure between the first gear 1002 and the first rack 1004, meanwhile, the sliding rod 1003 can be guided, and the sliding stability of the sliding rod 1003 is further improved.

In a specific embodiment of the invention: the storage pushing assembly comprises a pushing cylinder 1201, a bottom plate 1202, a pushing plate 1203 and four positioning rods 1204, the four positioning rods 1204 are distributed at four corners of the same side of the bottom plate 1202, the pushing plate 1203 is located between the four positioning rods 1204 and arranged in parallel with the bottom plate 1202, the pushing plate 1203 can slide along the length direction of the positioning rods 1204, the pushing cylinder 1201 is located on one side, away from the positioning rods 1204, of the bottom plate 1202, a through hole 1205 is formed in the bottom plate 1202, a piston rod 1203 of the pushing cylinder 1201 penetrates through the through hole 1205 and then is fixedly connected with a side wall, close to one side of the bottom plate 1202, of the pushing plate 1203, away from the bottom plate 1202, and is used for storing a new friction block 801.

Through adopting above-mentioned technical scheme, propelling movement cylinder 1201 and bottom plate 1202 all with mounting groove lateral wall fixed connection, four locating levers 1204's length is the same, all be equipped with an inner groovy on the relative inner wall of four locating levers 1204, this inner groovy runs through locating lever 1204 along locating lever 1204 length direction, form new clutch blocks 801's the space of putting between four locating levers 1204, four angles of new clutch blocks 801 are in four inner groovies respectively, propelling movement plate 1203 slides and sets up between four locating levers 1204, when propelling movement new clutch blocks 801, propelling movement cylinder 1201 starts the piston rod that drives it and drives propelling movement plate 1203 and promote new clutch blocks 801.

In a specific embodiment of the invention: the vacuum adsorption assembly comprises a vacuum chamber 1301 and an air extraction device, the vacuum chamber 1301 is arranged in the swing block 802 and located at one end close to the friction ring 7, an air extraction channel 1302 and a pressure relief channel 1303 are arranged on the inner wall of the vacuum chamber 1301, the air extraction device is connected with the air extraction channel 1302, the pressure relief channel 1303 is communicated with the atmosphere, a first control valve 1304 used for controlling whether the air extraction channel 1302 is communicated is arranged in the air extraction channel 1302, a second control valve 1305 used for controlling whether the pressure relief channel 1303 is communicated is arranged in the pressure relief channel 1303, an air guide hole 1306 is arranged on the side wall of the swing block 802 opposite to the friction block 801, and the air guide hole 1306 is communicated with the vacuum chamber 1301.

By adopting the above technical solution, the vacuum chamber 1301 can be arranged at any position in the swing block 802, and certainly, in order to ensure the fixing effect of the friction block 801, the length of the air guide hole 1306 should be as small as possible, therefore, preferably, the vacuum chamber 1301 is located at one end of the swing block 802 close to the friction ring 7, the air extracting device can be any device capable of extracting air, the air extracting device is fixed at one side of the swing block 802, the air extracting pipe of the air extracting device is hermetically connected with the air extracting channel 1302, the first control valve 1304 is installed between the air extracting pipe and the air extracting channel 1302, the pressure relief channel 1303 is used for communicating with the outside atmosphere, the second control valve 1305 is installed in the pressure relief channel 1303, when the friction block 801 needs to be sucked, the second control valve 1305 closes the pressure relief channel 1303 in a closed state, the first control valve 1304 opens the air extracting channel 1302, the friction block 801 is in contact with one end of the air guide hole 1306, the air extracting device is started, the air in the vacuum chamber 1301 is pumped out by the air pumping device, the vacuum chamber 1301 is in a vacuum state, at the moment, the friction block 801 is tightly sucked by the vacuum pressure in the vacuum chamber 1301 through the air guide hole 1306, in order to guarantee a good vacuum environment, the first control valve 1304 is closed after air pumping is completed, then the air pumping device is closed, the first control valve 1304 and the second control valve 1305 can be controlled by a single chip microcomputer connected with the outside, the friction block 801 is fixed through a vacuum adsorption assembly, punching or other structures are not needed to be designed on the surface of the friction block 801 for fixing and matching, waste which is difficult to remove and is not left on the surface of the friction block 801 after being used like glue, and the worn friction block 801 can be easily recycled.

In a specific embodiment of the invention: the air holes 1306 are distributed at intervals along the side wall of the swing block 802, and the distribution area of the air holes 1306 is smaller than that of the side wall of the friction block 801.

By adopting the above technical scheme, in order to ensure the vacuum effect of the vacuum chamber 1301 and improve the stability of fixing the friction block 801, the air guide holes 1306 are designed into a plurality of small holes, and the air guide holes 1306 are distributed at intervals, so that each part of the side wall of the friction block 801 can be uniformly acted by vacuum suction.

The invention also discloses a using method suitable for the speed reducer, and in the specific embodiment of the invention, the using method comprises the following steps: .

S1, normal operation: when the speed reducer works, the reduction gear 4 drives the transmission gear 6 to rotate, the transmission gear 6 drives the transmission shaft 5 to rotate, the transmission shaft 5 drives the friction ring 7 to rotate, the electric cylinder 901 starts to drive a piston rod on the electric cylinder to push the push block 902 towards the direction close to the friction ring 7, two ends of the push block 902 respectively push the two driving plates 903 so that one ends of the two swinging blocks 802 close to the friction ring 7 rotate oppositely and simultaneously extrude the pressure spring 803, and the swinging blocks 802 drive the two friction blocks 801 to contact with the friction ring 7 in the opposite rotation process;

s2, replacing friction block 801: when the friction blocks 801 are seriously worn, the speed reducer stops working, the electric cylinder 901 starts to drive a piston rod on the electric cylinder to drive the push block 902 to move towards the direction far away from the friction ring 7, at the moment, the elastic force of the pressure spring 803 pushes one ends of the two swing blocks 802 close to the friction ring 7 outwards to enable the two friction blocks 801 to be far away from the friction ring 7, then the vacuum adsorption assembly performs a releasing action to release the damaged friction blocks 801, the damaged friction blocks 801 fall off, the storage pushing assembly performs a pushing action to push the new friction blocks 801 onto the accurate conveying assembly, the accurate conveying assembly performs a conveying action to convey the new friction blocks 801 to the joints of the friction blocks 801 and the swing blocks 802, and the vacuum adsorption assembly performs an adsorption action to fix the new friction blocks 801;

wherein the releasing action comprises: the first control valve 1304 is closed, the second control valve 1305 is opened, the atmosphere is communicated with the vacuum chamber 1301, the air pressure in the vacuum chamber 1301 is the same as the atmospheric pressure, and the friction block 801 falls;

the pushing action comprises: the pushing cylinder 1201 is started to drive a piston rod on the pushing cylinder to drive the pushing plate 1203 to move, the pushing plate 1203 moves towards the direction far away from the bottom plate 1202 to push the new friction block 801 onto the placing plate 1007, and when the new friction block 801 is in contact with the baffle 1008, the pushing cylinder 1201 drives the piston rod on the pushing cylinder to move in the opposite direction to retract the pushing plate 1203;

the conveying action comprises: the driving motor 1001 is started to drive the first gear 1002 to rotate, the first gear 1002 and the first rack 1004 are matched with each other to drive the sliding rod 1003 to move towards the direction close to the friction ring 7, the sliding rod 1003 drives the two placing plates 1007 to move through the fixing block 1101 and the mounting plate 1104, the placing plates 1007 drive the new friction blocks 801 to be close to the swinging blocks 802, when one end of the first rack 1004 is in contact with the limiting block 1005, the driving motor 1001 stops, at the moment, the placing plates 1007 reach the connecting positions of the friction blocks 801 and the swinging blocks 802, and the new friction blocks 801 are in contact with the outer ends of the air guide holes 1306;

the adsorption action includes: the second control valve 1305 is closed, the first control valve 1304 is opened, the air-extracting device is started to extract air in the vacuum chamber 1301, the vacuum pressure in the vacuum chamber 1301 tightly sucks the friction block 801 through the air vent 1306, and finally the vacuum chamber 1301 is in a vacuum state, at this time, the first control valve 1304 is closed, and then the air-extracting device is closed.

By adopting the technical scheme, under the normal operation of the speed reducer, the first control valve 1304 is in a closed state, the second control valve 1305 is in a closed state, the vacuum chamber 1301 is in a vacuum state, at the moment, the friction block 801 and the friction ring 7 are matched with each other to generate resistance, when the friction block 801 is seriously abraded, the speed reducer stops working, the two swinging blocks 802 return to the original positions, the vacuum adsorption assembly performs release action, the friction block 801 is not absorbed any more, the friction block 801 freely falls under the action of gravity, a recovery frame can be arranged below the friction block 801 to recover the abraded friction block 801, in the process, the storage pushing assembly pushes the new friction block 801 to the placing plate 1007, the driving motor 1001 starts to drive the first gear 1002 to be meshed with the first rack 1004 to drive the sliding rod 1003 to move, the sliding rod 1003 carries the placing plate 1007 to convey the new friction block 801 to the installation position, the vacuum adsorption assembly performs adsorption action to fix the new friction block 801, compared with the prior art, the invention can reduce the vibration of the blade cutting process by generating resistance through the mutual matching of the friction block 801 and the friction ring 7, and simultaneously change the friction block 801 through a reasonably designed structure so as to prolong the service life of the speed reducer, in addition, the invention can adopt automatic control on the basis of the structure change of the friction block 801, thereby reducing the labor cost.

In a specific embodiment of the invention: and a door body 14 for opening and closing the mounting groove is arranged on the side wall of the mounting shell 904 opposite to the storage pushing component.

Through adopting above-mentioned technical scheme, opening door body 14 and can carrying out the storage of new clutch blocks 801, new clutch blocks 801 all stores between four locating levers 1204, and clutch blocks 801's wear cycle is longer, consequently only need store two to three new clutch blocks 801 generally can, store a small amount of new clutch blocks 801 simultaneously also can minimize the length of locating lever 1204, reduce the volume of storing the propelling movement subassembly.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a move stable speed reducer for circular saw, includes casing (1), input shaft (2), output shaft (3), establishes the reduction gears between input shaft (2) and output shaft (3), input shaft (2), output shaft (3), reduction gears all establish in casing (1), its characterized in that: a reduction gear (4) is arranged on the output shaft (3), a transmission shaft (5) is arranged on one side of the output shaft (3), the transmission shaft (5) is rotatably connected with the shell (1), a transmission gear (6) is arranged on the transmission shaft (5) and opposite to the reduction gear (4), the reduction gear (4) is meshed with the transmission gear (6), one end of the transmission shaft (5) penetrates through the inner wall of the shell (1) and then extends to the outside of the shell (1), a friction ring (7) is arranged at one end, located outside the shell (1), of the transmission shaft (5), and a friction assembly (8) which is used for contacting with the friction ring (7) so as to transmit a rotation resistance to the transmission shaft (5) is arranged on one side of the friction ring (7);

the friction assembly (8) comprises two friction blocks (801) and two swinging blocks (802), the two swinging blocks (802) are arranged in parallel, the middle parts of the two swinging blocks (802) are hinged to each other, a pressure spring (803) is arranged at the hinged position of the two swinging blocks (802), the two friction blocks (801) are respectively fixed at one ends, close to the friction ring (7), of the two swinging blocks (802), the two friction blocks (801) are located on one opposite side of the two swinging blocks (802), the friction ring (7) is located between the two friction blocks (801), and a driving assembly for driving one ends, close to the friction ring (7), of the two swinging blocks (802) to rotate oppositely by taking a hinge point as a fulcrum is arranged at one end, far away from the friction ring (7), of the swinging blocks (802);

the driving assembly comprises an electric cylinder (901), a push block (902) and driving plates (903), the push block (902) is fixedly connected with a piston rod of the electric cylinder (901), one ends, far away from the friction ring (7), of the two swinging blocks (802) are respectively provided with the driving plates (903), the side walls, close to the push block (902), of one ends of the driving plates (903) are inclined, the two ends of the push block (902) are respectively contacted with the two driving plates (903), the friction block (801) is detachably connected onto the swinging blocks (802) through a vacuum adsorption assembly, one side of each swinging block (802) is provided with a mounting shell (904), and an accurate conveying assembly for conveying the new friction block (801) to the connecting position of the friction block (801) and the swinging block (802) is arranged in the mounting shell (904);

the precise conveying assembly comprises a driving motor (1001), a first gear (1002), a sliding rod (1003), a first rack (1004), a limiting block (1005), a guide sleeve (1006) and two placing plates (1007), wherein a mounting groove is formed in the mounting shell (904), the sliding rod (1003) is arranged in the mounting groove in a sliding mode, the driving motor (1001) is located at one end, far away from a friction ring (7), of the sliding rod (1003), the first gear (1002) is coaxially connected with a driving output shaft of the driving motor (1001), a first rack (1004) is arranged on the side wall, close to one end of the first gear (1002), of the sliding rod (1003), the first rack (1004) is arranged along the length direction of the sliding rod (1003), the first gear (1002) is meshed with the first rack (1004), the limiting block (1005) is fixed in the mounting groove and can be in contact with the first rack (1004) to limit the movement of the sliding rod (1003), the utility model discloses a sliding rod, including the mounting panel, uide bushing (1006) is fixed and is used for leading slide bar (1003) in the mounting groove, two place board (1007) parallel and establish the one end of keeping away from driving motor (1001) in slide bar (1003), place board (1007) one side be equipped with be used for storing new clutch blocks (801) and can push away new clutch blocks (801) to the storage propelling movement subassembly of placing on board (1007), it is equipped with baffle (1008) to place one side of keeping away from on board (1007), slide bar (1003) and place and be equipped with the supplementary slip subassembly that is used for improving slide bar (1003) slip smoothness between board (1007), installation shell (904) are close to and are equipped with on the lateral wall of placing board (1007) one side and carry mouth (1009), carry mouth (1009) and mounting groove intercommunication.

2. The speed reducer for the circular saw machine stable in operation according to claim 1, wherein: the auxiliary sliding assembly comprises a fixing block (1101), a second gear (1102) and a second rack (1103), one end, far away from a driving motor (1001), of the sliding rod (1003) is fixedly connected with the side wall of the fixing block (1101), one side, far away from the sliding rod (1003), of the fixing block (1101) is provided with a mounting plate (1104), the two placing plates (1007) are fixed to two sides of the mounting plate (1104), the second gear (1102) is rotatably connected to the side wall of the fixing block (1101), the second rack (1103) is fixed to the side wall of the mounting groove along the length direction of the sliding rod (1003), and the second gear (1102) is meshed with the second rack (1103).

3. The speed reducer for the circular saw machine stable in operation according to claim 2, wherein: store propelling movement subassembly including propelling movement cylinder (1201), bottom plate (1202), propelling movement board (1203), four locating levers (1204) distribute in bottom plate (1202) four angles departments with one side, propelling movement board (1203) are located between four locating levers (1204), and with bottom plate (1202) parallel arrangement, propelling movement board (1203) can be followed locating lever (1204) length direction and slided, propelling movement cylinder (1201) are located bottom plate (1202) and keep away from one side of locating lever (1204), be equipped with through hole (1205) on bottom plate (1202), the piston rod of propelling movement cylinder (1201) passes through hole (1205) back and propelling movement board (1203) are close to the lateral wall fixed connection of bottom plate (1202) one side, one side that bottom plate (1202) were kept away from to bottom plate (1203) is used for storing new friction block (801).

4. The speed reducer for the circular saw machine stable in operation of claim 3, wherein: the vacuum adsorption assembly comprises a vacuum chamber (1301) and an air extraction device, the vacuum chamber (1301) is arranged in a swinging block (802) and located at one end close to a friction ring (7), an air extraction channel (1302) and a pressure relief channel (1303) are arranged on the inner wall of the vacuum chamber (1301), the air extraction device is connected with the air extraction channel (1302), the pressure relief channel (1303) is communicated with the atmosphere, a first control valve (1304) used for controlling whether the air extraction channel (1302) is communicated or not is arranged in the air extraction channel (1302), a second control valve (1305) used for controlling whether the pressure relief channel (1303) is communicated or not is arranged in the pressure relief channel (1303), air guide holes (1306) are formed in the side walls, opposite to the swinging block (802) and the friction block (801), of the air guide holes (1306), and the vacuum chamber (1301) are communicated.

5. The speed reducer for the circular saw machine stable in operation of claim 4, wherein: the air guide holes (1306) are distributed at intervals along the side wall of the swinging block (802), and the distribution area of the air guide holes (1306) is smaller than that of the side wall of the friction block (801).

6. The use method of the speed reducer for the circular saw machine, which is suitable for the stable operation of the claim 5, is characterized by comprising the following steps:

s1, normal operation: the speed reducer works, the reduction gear (4) drives the transmission gear (6) to rotate, the transmission gear (6) drives the transmission shaft (5) to rotate, the transmission shaft (5) drives the friction ring (7) to rotate, the electric cylinder (901) is started to drive a piston rod on the electric cylinder to push the push block (902) towards the direction close to the friction ring (7), two ends of the push block (902) respectively push the two drive plates (903) to enable one ends of the two swing blocks (802) close to the friction ring (7) to rotate oppositely and simultaneously extrude the pressure spring (803), and the swing blocks (802) drive the two friction blocks (801) to be in contact with the friction ring (7) in the opposite rotation process;

s2, replacement friction block (801): when the friction blocks (801) are seriously worn, the speed reducer stops working, the electric cylinder (901) starts to drive a piston rod on the electric cylinder to drive the push blocks (902) to move towards the direction far away from the friction ring (7), at the moment, the elastic force of the pressure spring (803) pushes one ends of the two swing blocks (802) close to the friction ring (7) outwards to enable the two friction blocks (801) to be far away from the friction ring (7), then the vacuum adsorption assembly executes a releasing action to release the damaged friction blocks (801), the damaged friction blocks (801) fall off, the storage push assembly executes a push action to push the new friction blocks (801) to the precise conveying assembly, the precise conveying assembly executes a conveying action to convey the new friction blocks (801) to the joints of the friction blocks (801) and the swing blocks (802), and the vacuum adsorption assembly executes an adsorption action to fix the new friction blocks (801);

wherein the releasing action comprises: the first control valve (1304) is closed, the second control valve (1305) is opened, the atmosphere is communicated with the vacuum chamber (1301), the air pressure in the vacuum chamber (1301) is the same as the atmospheric pressure, and the friction block (801) falls;

the pushing action comprises: the pushing cylinder is started to drive a piston rod on the pushing cylinder to drive the pushing plate (1203) to move, the pushing plate (1203) moves towards the direction far away from the bottom plate (1202) to push a new friction block (801) onto the placing plate (1007), and when the new friction block (801) is in contact with the baffle (1008), the pushing cylinder drives the piston rod on the pushing cylinder to move in the opposite direction to retract the pushing plate (1203);

the conveying action comprises: the driving motor (1001) is started to drive the first gear (1002) to rotate, the first gear (1002) and the first rack (1004) are matched with each other to drive the sliding rod (1003) to move towards the direction close to the friction ring (7), the sliding rod (1003) drives the two placing plates (1007) to move through the fixing block (1101) and the mounting plate (1104), the placing plates (1007) carry new friction blocks (801) to be close to the swinging blocks (802), when one end of the first rack (1004) is in contact with the limiting block (1005), the driving motor (1001) stops, the placing plates (1007) reach the connection positions of the friction blocks (801) and the swinging blocks (802), and the new friction blocks (801) are in contact with the outer ends of the air guide holes (1306);

the adsorption action includes: the second control valve (1305) is closed, the first control valve (1304) is opened, the air pumping device is started to pump air out of the vacuum chamber (1301), the friction block (801) is tightly sucked by vacuum pressure in the vacuum chamber (1301) through the air guide hole (1306), finally the vacuum chamber (1301) is in a vacuum state, at the moment, the first control valve (1304) is closed, and then the air pumping device is closed.

7. The use method of the speed reducer for the circular saw machine with stable operation according to claim 6, wherein the speed reducer comprises the following steps: and a door body (14) for opening and closing the mounting groove is arranged on the side wall of the mounting shell (904) at a position opposite to the storage pushing assembly.