CN113124066B

CN113124066B - Drum-shaped tooth type coupling

Info

Publication number: CN113124066B
Application number: CN202110435722.XA
Authority: CN
Inventors: 幸容妹
Original assignee: Guangzhou Pulian Intelligent Equipment Co ltd
Current assignee: Guangzhou Pulian Intelligent Equipment Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-12-23
Anticipated expiration: 2041-04-22
Also published as: CN113124066A

Abstract

The invention relates to the field of couplings and discloses a drum-shaped tooth coupling which comprises a driving coupling, a driven coupling, a first coupling sleeve and a second coupling sleeve, wherein the first coupling sleeve and the second coupling sleeve are connected through flanges, the driving coupling and the driven coupling are fixedly sleeved on one sides of the first coupling sleeve and the second coupling sleeve through bolts respectively, a first gear ring and a second gear ring are arranged inside the first coupling sleeve and the second coupling sleeve respectively, and one end of the driving coupling is provided with a driving drum-shaped tooth meshed with the first gear ring. This drum type tooth-like shaft coupling through the structural design that second shaft coupling cover and the activity of driven shaft coupling outside slip ring cup jointed for the shaft coupling possesses the axial compensation ability of anti vibration, and, utilizes motor or transmission equipment vibration to make driven shaft coupling produce the power of the reciprocal lateral shifting of high frequency, carries out the oil spout to two meshing positions between the shaft coupling gear, reduces shaft coupling gear engagement's degree of wear, thereby improves the life of shaft coupling.

Description

Drum-shaped tooth type coupling

Technical Field

The invention relates to the field of couplings, in particular to a drum-shaped tooth-type coupling.

Background

The drum-shaped tooth type coupling is a common rigid flexible coupling, has strong bearing capacity, improves the contact condition of external teeth caused by drum-shaped tooth surfaces, avoids the defects of stress concentration and extrusion of edges at the end of straight teeth under the condition of angular displacement, improves the friction and abrasion conditions of the tooth surfaces, reduces noise, and has the advantages of long maintenance period, and has wider application field.

However, in the use process of the existing drum-shaped tooth type coupler, the vibration influence between the equipment connected with the coupler and the driving motor causes relative axial movement between the driving shaft and the transmission shaft connected with the coupler, which easily causes the coupler to be damaged when the driving shaft and the transmission shaft move relatively, and the existing drum-shaped tooth type coupler usually lubricates the gear meshing part by periodically adding lubricating oil, so that when the equipment works, the lubricating oil film layer at the gear meshing part is rapidly consumed when the driving shaft and the transmission shaft move relatively due to vibration high frequency, so that the compensation can not be realized, the wear degree of the gear meshing of the coupler is improved, and the service life of the coupler is shortened. .

Disclosure of Invention

The invention provides a drum-shaped tooth type coupling which has the advantages of vibration-proof axial compensation capability and long service life and solves the technical problems in the background technology.

In order to realize the purpose, the invention provides the following technical scheme to realize the purpose: a drum-shaped gear coupling comprises a driving coupling, a driven coupling, a first coupling sleeve and a second coupling sleeve, wherein the first coupling sleeve and the second coupling sleeve are in flange connection, the driving coupling and the driven coupling are fixedly sleeved on one sides of the first coupling sleeve and the second coupling sleeve through bolts respectively, a first gear ring and a second gear ring are arranged inside the first coupling sleeve and the second coupling sleeve respectively, a driving crowned tooth meshed with the first gear ring is arranged at one end of the driving coupling, a driven crowned tooth meshed with the second gear ring is arranged at one end of the driven coupling, a limiting inner convex ring positioned on one side of the second gear ring is arranged inside the second coupling sleeve, oil holes facing the meshing part of the driven crowned tooth and the second gear ring are formed in the limiting inner convex ring, a plurality of first oil guide grooves communicated with the first inner grooves are formed in the driving coupling, one side of each first oil guide groove is positioned between every two driving crowned oil injection holes in the driving coupling, the first oil guide grooves are communicated with the limiting convex ring, and when the driven coupling moves towards the driving coupling relatively.

Optionally, a corrugated compensation pipe is arranged between the middle portions of the driving coupling and the driven coupling, a first inner groove and a second inner groove communicated with the corrugated compensation pipe are respectively formed in the other ends of the driving coupling and the driven coupling, the inner side of the limiting inner collar is movably sleeved with the inner wall of the driven coupling, a sliding ring located on the outer side of the limiting inner collar is fixedly sleeved on the driven coupling, an oil storage cavity is formed between the sliding ring and the limiting inner collar, an oil return groove communicated with the cavity between the driving coupling and the driven coupling and the oil storage cavity is formed in the second coupling, one side of the oil return groove is close to the sliding ring, a second oil guide groove communicated with the second inner groove and the oil storage cavity is formed in the driven coupling, and a spring movably sleeved outside the corrugated compensation pipe is arranged between the two ends of the driving coupling and the driven coupling.

Optionally, a certain distance is reserved between the first gear ring and the second gear ring, the diameter of the inner cavity of the first coupling sleeve is the same as that of the inner cavity of the second coupling sleeve, the other ends of the driving coupling and the driven coupling are fixedly connected with a positioning ring plate and a movable ring plate respectively, the outer sides of the positioning ring plate and the movable ring plate are respectively attached to the inner walls of the driven coupling and the second coupling sleeve, a limiting sealing ring is fixedly connected between the positioning ring plate and the movable ring plate, a whole ring of annular grooves are formed in the outer side of the limiting sealing ring, and through grooves are formed in the outer edges of the positioning ring plate, the movable ring plate and the limiting sealing ring.

Optionally, one end of the first coupling sleeve is fixedly connected with a first seal ring through a bolt, a seal ring is arranged between the inner side of the first seal ring and the outer side of the driving coupling, one end of the second coupling sleeve is fixedly connected with a sliding ring through a bolt, and a seal ring is arranged between the inner side of the sliding ring and the outer side of the driven coupling.

Optionally, the side surface of the driving crown gear is movably connected with the inner wall of the first coupling sleeve, the length of the driven crown gear is smaller than that of the second gear ring, and the driven crown gear is arranged in the middle of the second gear ring in an initial state.

Optionally, a positioning sealing ring is arranged in the oil storage cavity, the inner side of the positioning sealing ring is attached to the outer side of the driven coupling, the second oil guide groove is plugged in the inner side of the positioning sealing ring in a normal state, and the positioning sealing ring is softer than the limiting sealing ring.

Optionally, a magnetic ring is arranged on the side surface of the sliding ring, and a whole ring of groove is formed in one side, facing the limiting inner convex ring, of the magnetic ring.

The invention provides a drum-shaped tooth type coupling, which has the following beneficial effects:

1. this drum type tooth-like shaft coupling through the second coupling sleeve with the driven coupling outside slip ring activity structural design who cup joints for the shaft coupling possesses the axial compensation ability of anti vibration, and, utilize motor or transmission vibration to make the driven coupling produce the reciprocal lateral shifting's of high frequency power, carry out the oil spout to two meshing positions between the shaft coupling gear, reduce shaft coupling gear engagement's degree of wear, thereby improve the life of shaft coupling.

2. This drum type tooth-like shaft coupling still moves through the slip ring and impresses the lubricating oil in the oil storage chamber in the second leads the oilhole of oil groove and spacing interior bulge loop, utilize the second to lead the throttling action of oil groove and oilhole, cushion, effectually avoided because of equipment vibration, when axial displacement appears in drive shaft or the transmission shaft that makes shaft coupling both ends connect, sudden drunkenness leads to the problem of shaft coupling damage easily, compare in current spring buffering that sets up alone, avoid the spring to receive the compression of high frequency and relax the process, influence the life of spring.

3. This drum type tooth-like shaft coupling, under the high pressure effect of throttle, make oil can spout into the gear position of two meshing of shaft coupling, thereby effective formation oil film, the lubrication effect has further been improved, and, utilize equipment vibration to make drive shaft or transmission shaft axial displacement appear, carry out automatic cycle and mend oil, guarantee long-time operating condition's between the shaft coupling meshing gear lubrication effect, still effectively prevent that the dust from getting into easily and leading to inside lubricating oil inefficacy, cause the wearing and tearing aggravation, influence the problem of drum type tooth-like shaft coupling's life.

4. This drum type tooth-like shaft coupling through the magnetic ring design of slip ring pressure oil side, adsorbs the metal abrasive dust in the oil return through the magnetic ring, when avoiding oil cyclic utilization to lubricate, the metal abrasive dust that mixes in the oil leads to the fact the further wearing and tearing problem between the gear to the effect of guarantee self-lubricating.

Drawings

FIG. 1 is a sectional structure diagram of the coupling of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic view of the structural limit sealing ring of FIG. 2 of the present invention.

In the figure: 1. an active coupling; 101. a driving crowned tooth; 102. a first inner tank; 103. a first oil guide groove; 2. a driven coupling; 201. a driven crowned tooth; 202. a second inner tank; 203. a second oil guide groove; 3. a first coupling sleeve; 301. a first ring gear; 4. a second coupling sleeve; 401. a second ring gear; 402. an oil return groove; 403. a limiting inner convex ring; 5. a first seal ring; 6. a second seal ring; 7. a slip ring; 8. positioning the ring plate; 9. moving the ring plate; 10. a corrugated compensation pipe; 11. a spring; 12. a limiting sealing ring; 13. and positioning the sealing ring.

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.

Referring to fig. 1-3, a drum-type gear coupling includes a driving coupling 1, a driven coupling 2, a first coupling sleeve 3, a second coupling sleeve 4, the first coupling sleeve 3 and the second coupling sleeve 4 are flange-connected, the driving coupling 1 and the driven coupling 2 are fixedly mounted on one side of the first coupling sleeve 3 and one side of the second coupling sleeve 4 respectively through bolts, a first gear ring 301 and a second gear ring 401 are respectively disposed inside the first coupling sleeve 3 and the second coupling sleeve 4, a driving crown gear 101 engaged with the first gear ring 301 is disposed at one end of the driving coupling 1, a driven crown gear 201 engaged with the second gear ring 401 is disposed at one end of the driven coupling 2, a corrugated compensation pipe 10 is disposed between the middle portions of the driving coupling 1 and the driven coupling 2, a first inner groove 102 and a second inner groove 202 communicated with the corrugated compensation pipe 10 are disposed at the other end of the driving coupling 1 and the driven coupling 2, a plurality of first oil guide grooves 103 communicated with the first inner groove 102 are disposed on the driving coupling 1, one side of each first oil guide groove 103 is respectively positioned between the gaps of every two driving crown teeth 101 on the driving coupling 1, a limiting inner convex ring 403 positioned on one side of the second gear ring 401 is arranged inside the second coupling sleeve 4, an oil hole facing the meshing part of the driven crown teeth 201 and the second gear ring 401 is arranged on the limiting inner convex ring 403, the inner side of the limiting inner convex ring 403 is movably sleeved with the inner wall of the driven coupling 2, a sliding ring 7 positioned on the outer side of the limiting inner convex ring 403 is fixedly sleeved on the driven coupling 2, an oil storage chamber is formed between the sliding ring 7 and the limiting inner convex ring 403, an oil return groove 402 communicating the chamber between the driving coupling 1 and the driven coupling 2 and the oil storage chamber is arranged on the second coupling sleeve 4, one side of the oil return groove 402 is close to the sliding ring 7, a second oil guide groove 203 communicating the second inner groove 202 and the oil storage chamber is arranged on the driven coupling 2, a spring 11 movably sleeved outside the corrugated compensation pipe 10 is arranged between two ends of the driving coupling 1 and the driven coupling 2, one end of the driving coupling 1 is connected with a driving shaft of a driving motor, one end of the driven coupling 2 is connected with a transmission shaft for axial distance compensation, so that when the device is used, the driving shaft is driven by the driving motor to rotate, when the motor or the equipment connected with the transmission shaft vibrates in the working process, the transmission shaft or the driving shaft of the motor can generate axial displacement, when the driven coupling 2 relatively moves towards the driving coupling 1 in a high-frequency transverse reciprocating manner due to the vibration influence, the driven coupling 2 drives the sliding ring 7 to move leftwards, so as to compress lubricating oil in an oil storage chamber in an inner cavity of the sliding ring 7, meanwhile, the sliding ring 7 blocks an oil return groove 402, so that the lubricating oil sprays oil towards the meshing part between the driven drum-shaped teeth 201 and the second gear ring 401 through an oil hole on the limiting inner convex ring 403, the axial deviation of the driven coupling 2 is lubricated, the abrasion degree between the driven crown-shaped teeth 201 and the second gear ring 401 is reduced when the driven coupling 2 is axially moved and buffered due to vibration, so that the service life of the coupling is prolonged, meanwhile, the left movement of the sliding ring 7 also enables part of lubricating oil in an oil storage chamber to enter the corrugated compensation pipe 10 through the second oil guide groove 203 and the second inner groove 202, a certain amount of lubricating oil is injected into the corrugated compensation pipe 10 in advance, the lubricating oil extends to an outgoing oil filling hole through the oil return groove 402 at the top of the second coupling sleeve 4 before use and is then sealed, and the lubricating oil in the corrugated compensation pipe 10 flows into a gap between the driving crown-shaped teeth 101 and the first gear ring 301 from the first inner groove 102 and the first oil guide groove 103 under the action of the centrifugal force of the integral rotation of the driving coupling 1, the driven coupling 2, the first coupling sleeve 3 and the second coupling sleeve 4, therefore, the meshing part of the driving crown gear 101 and the first gear ring 301 is lubricated by supplementing oil, the service life of the coupler is further prolonged, the lubricating oil is always pressed into the inner walls of the first coupling sleeve 3 and the second coupling sleeve 4 under the centrifugal force action of the integral rotation of the driving coupling 1, the driven coupling 2, the first coupling sleeve 3 and the second coupling sleeve 4, and flows back to the oil storage chamber through the oil return groove 402 when the sliding ring 7 moves to the right, the lubricating oil in the oil storage chamber is pressed into the oil holes of the second oil guide groove 203 and the limiting inner convex ring 403 by the movement of the sliding ring 7, the buffering is carried out by utilizing the throttling action of the second oil guide groove 203 and the oil holes, and the axial displacement of a driving shaft or a transmission shaft connected with two ends of the coupler caused by the vibration of equipment is effectively avoided, sudden drunkenness is easy, lead to the problem that the shaft coupling damaged, compare in current independent setting spring buffering, avoid the spring to receive the compression of high frequency and relax the process, influence the life of spring, and simultaneously, under the high-pressure effect of throttle, make oil can spout the gear position of two meshings of shaft coupling, thereby effectively carry out the oil film, lubrication effect has further been improved, and, utilize equipment vibration to make axial displacement appear in drive shaft or transmission shaft, carry out automatic cycle and mend oil, guarantee long-time operating condition's between the shaft coupling meshing gear lubrication effect, still effectively prevent that the dust from getting into easily and leading to inside lubricating oil inefficacy, cause the wearing and tearing aggravation, influence the problem of the life of drum-type tooth shaft coupling.

Wherein, a certain distance is reserved between the first gear ring 301 and the second gear ring 401, the diameter of the inner cavity of the first coupling sleeve 3 is the same as that of the inner cavity of the second coupling sleeve 4, the other ends of the driving coupling 1 and the driven coupling 2 are respectively fixedly connected with a positioning ring plate 8 and a moving ring plate 9, the outer sides of the positioning ring plate 8 and the moving ring plate 9 are respectively attached to the inner walls of the driven coupling 2 and the second coupling sleeve 4, a limit sealing ring 12 is fixedly connected between the positioning ring plate 8 and the moving ring plate 9, the outer side of the limit sealing ring 12 is provided with a whole ring-shaped groove, the outer edges of the positioning ring plate 8, the moving ring plate 9 and the limit sealing ring 12 are provided with through grooves, and when the sliding ring 7 is in a left-moving state, when driven shaft coupling 2 moves axial compensation towards initiative shaft coupling 1 promptly, remove ring plate 9 and remove towards retainer ring board 8, make the outer edge both sides laminating of spacing sealing ring 12, thereby shutoff oil groove 402, thereby slip ring 7 can be when moving to the left, impress lubricating oil in the oilhole and the second of spacing interior cam collar 403 lead oil groove 203, and at slip ring 7 in-process that moves to the right, remove ring plate 9 and retainer ring board 8 separation, remaining lubricating oil after the lubrication remains the inner wall side at first shaft coupling 3, second shaft coupling 4 all the time under the rotatory centrifugal force effect of shaft coupling, thereby flow into one side of ring channel through the via-groove, and flow back to the oil storage chamber in via oil groove 402, so that cyclic utilization.

Wherein, the one end of first shaft coupling 3 is through the first seal ring 5 of bolt fixedly connected with, and be equipped with the sealing washer between the inboard of first seal ring 5 and the outside of initiative shaft coupling 1, the one end of second shaft coupling 4 is through bolt fixedly connected with slip ring 7, and be equipped with the sealing washer between the inboard of slip ring 7 and the outside of driven shaft coupling 2, utilize first seal ring 5 to seal first shaft coupling 3 in initiative shaft coupling 1, the connection part of second shaft coupling 4 and driven shaft coupling 2, prevent that external dust from getting into and the problem of inside lubricating oil leakage.

The side surface of the driving crown tooth 101 is movably connected with the inner wall of the first coupling sleeve 3, the length value of the driven crown tooth 201 is smaller than that of the second ring gear 401, and the driven crown tooth 201 is arranged in the middle of the second ring gear 401 in an initial state, so that when the driven coupling 2 moves transversely, the driven crown tooth 201 can still be stably meshed with the second ring gear 401, and the coupling has axial anti-vibration compensation capacity.

The positioning seal ring 13 is arranged in the oil storage chamber, the inner side of the positioning seal ring 13 is attached to the outer side of the driven coupling 2, the inner side of the positioning seal ring 13 normally blocks the second oil guide groove 203, the positioning seal ring 13 is softer than the limiting seal ring 12, when the sliding ring 7 moves leftwards, the positioning seal ring 13 is compressed by oil pressure, oil flows into the second inner groove 202 from the second oil guide groove 203, the oil pressure is sufficient due to throttling of an oil hole of the limiting inner convex ring 403, and when the sliding ring 7 moves rightwards, the positioning seal ring 13 restores to block the second oil guide groove 203, so that part of lubricating oil between the driving coupling 1 and the driven coupling 2 flows back into the oil storage chamber under the action of rotary centrifugal force, the oil amount in the oil storage chamber is kept sufficient, and the sliding ring 7 can be lubricated by sufficient oil pressure and oil amount every time when the sliding ring 7 moves transversely and performs axial compensation, and the self-lubricating effect is improved.

Wherein, the side of slip ring 7 is equipped with the magnetic ring, and the magnetic ring has seted up a whole circle recess towards one side of spacing interior bulge loop 403, adsorbs the metal abrasive dust in the backward flow oil through the magnetic ring, when avoiding oil cyclic utilization to lubricate, the metal abrasive dust that mixes in the oil causes the further wearing and tearing problem between the gear to the effect of guarantee self-lubricating, and when slip ring 7 moved towards left side and pressed oil, the metal abrasive dust was under the reaction force of oil pressure, and stable absorption was in the recess of magnetic ring.

When the lubricating oil compensation pipe is used, firstly, one end of a driving coupling 1 is connected with a driving shaft of a driving motor, one end of a driven coupling 2 is connected with the driving shaft, oil is injected to an outgoing oil filling hole through an oil return groove 402 at the top of a second coupling sleeve 4 before use, then the sealing is carried out, then, in the process that the coupling rotates along with the coupling, when the motor or equipment connected with the driving shaft vibrates in the working process, the driving shaft or the driving shaft of the motor can generate axial displacement, when the driven coupling 2 relatively moves towards the driving coupling 1 in a high-frequency transverse reciprocating mode due to the influence of vibration, the driven coupling 2 drives a sliding ring 7 to move left, so that the lubricating oil in an oil storage chamber of an inner cavity of the sliding ring 7 is compressed, meanwhile, the sliding ring 7 seals the oil return groove 402, so that the lubricating oil flows towards a meshing position between a driven drum-shaped tooth 201 and a second tooth ring 401 through an oil hole on an inner limiting inner convex ring 403, meanwhile, the sliding ring 7 moves left, so that part of the lubricating oil in the oil storage chamber enters a compensation pipe 10 through second oil guide groove 203 and a second oil guide groove 202, the compensation pipe 10, a certain amount of the driving coupling is injected in advance, so that the lubricating oil flows into the first coupling sleeve 101 and the first coupling 4, and the second oil guide groove 101 and the second oil guide groove 3, so that the first coupling 4 and the second oil guide groove 301 of the lower coupling sleeve can perform integral driving coupling, and the first coupling, and the second oil guide groove 3, and the second oil guide groove 301, so that the first coupling can perform integral lubricating oil guide groove 3, and the integral compensation pipe 301, the oil injection lubricating device is characterized in that the oil injection lubricating device is always pressed into the inner walls of the first coupling sleeve 3 and the second coupling sleeve 4, and when the sliding ring 7 moves rightwards, the oil flows back into the oil storage chamber through the oil return groove 402, and the oil injection lubricating device reciprocates in such a way, so that oil injection lubrication is automatically performed on meshing parts between gears when the shaft coupling performs vibration axial compensation on equipment and a motor every time.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a drum type tooth coupling, including initiative shaft coupling (1), driven shaft coupling (2), first shaft coupling (3), second shaft coupling (4) flange joint, initiative shaft coupling (1) and driven shaft coupling (2) are respectively through the fixed suit of bolt in first shaft coupling (3), one side of second shaft coupling (4), first shaft coupling (3), the inside of second shaft coupling (4) is equipped with first ring gear (301) respectively, second ring gear (401), the one end of initiative shaft coupling (1) is equipped with initiative cydariform tooth (101) with first ring gear (301) meshing, the one end of driven shaft coupling (2) is equipped with driven cydariform tooth (201) with second ring gear (401) meshing, its characterized in that: a limiting inner convex ring (403) which is positioned on one side of the second gear ring (401) is arranged inside the second coupling sleeve (4), an oil hole which is opposite to the meshing part of the driven drum-shaped teeth (201) and the second gear ring (401) is formed in the limiting inner convex ring (403), a plurality of first oil guide grooves (103) which are communicated with the first inner grooves (102) are formed in the driving coupling (1), one side of each first oil guide groove (103) is respectively positioned between the gaps of every two driving drum-shaped teeth (101) on the driving coupling (1), the first oil guide grooves (103) are communicated with the oil holes in the limiting inner convex ring (403), when the driven coupling (2) moves towards the driving coupling (1) relatively, the first oil guide grooves (103) and the oil holes spray oil simultaneously, a corrugated compensation pipe (10) is arranged between the middle parts of the driving coupling (1) and the driven coupling (2), a first oil guide groove (102) which is communicated with the compensation pipe (10) and a second oil guide groove (403) are respectively formed at the other ends of the driving coupling (1) and the driven coupling (2), a sliding ring (7) which is positioned on the inner side of the limiting inner convex ring (403) and is movably sleeved with the limiting inner side of the limiting inner convex ring (7), the oil storage type magnetic coupling is characterized in that an oil return groove (402) which is communicated with a cavity between the driving coupling (1) and the driven coupling (2) and an oil storage cavity is formed in the second coupling sleeve (4), one side of the oil return groove (402) is close to the sliding ring (7), a second oil guide groove (203) which is communicated with the second inner groove (202) and the oil storage cavity is formed in the driven coupling (2), a spring (11) which is movably sleeved outside the corrugated compensation pipe (10) is arranged between the two ends of the driving coupling (1) and the driven coupling (2), a positioning sealing ring (13) is arranged in the oil storage cavity, the inner side of the positioning sealing ring (13) is attached to the outer side of the driven coupling (2), the second oil guide groove (203) is blocked under the inner side normal state of the positioning sealing ring (13), the positioning sealing ring (13) is softer than the limiting sealing ring (12), a side face of the sliding ring (7) is provided with a magnetic ring, and one side, facing the limiting inner annular ring (403), is provided with a whole annular groove.

2. A drum type tooth coupling according to claim 1, characterized in that: the gear ring structure is characterized in that a certain distance is reserved between the first gear ring (301) and the second gear ring (401), the diameter of the inner cavity of the first coupling sleeve (3) is the same as that of the inner cavity of the second coupling sleeve (4), the other ends of the driving coupling (1) and the driven coupling (2) are fixedly connected with a locating ring plate (8) and a movable ring plate (9), the outer sides of the locating ring plate (8) and the movable ring plate (9) are respectively attached to the inner walls of the driven coupling (2) and the second coupling sleeve (4), a limiting sealing ring (12) is fixedly connected between the locating ring plate (8) and the movable ring plate (9), a whole ring of annular groove is formed in the outer side of the limiting sealing ring (12), and a through groove is formed in the outer edges of the locating ring plate (8), the movable ring plate (9) and the limiting sealing ring (12).

3. A drum-type tooth coupling in accordance with claim 1, wherein: the one end of first shaft coupling (3) is passed through the first seal ring of bolt fixedly connected with (5), and is equipped with the sealing washer between the inboard of first seal ring (5) and the outside of initiative shaft coupling (1), bolt fixedly connected with slip ring (7) is passed through to the one end of second shaft coupling (4), and is equipped with the sealing washer between the inboard of slip ring (7) and the outside of driven shaft coupling (2).

4. A drum-type tooth coupling in accordance with claim 1, wherein: the side face of the driving crowned tooth (101) is movably connected with the inner wall of the first coupling sleeve (3), the length value of the driven crowned tooth (201) is smaller than that of the second ring gear (401), and the driven crowned tooth (201) is arranged in the middle of the second ring gear (401) in an initial state.