阅读说明：本技术 一种用于厚带重载卷取机减速箱的换挡机构及使用方法 (Gear shifting mechanism for reduction gearbox of heavy-duty thick-belt coiler and using method ) 是由 闫成琨 计江 夏宇 窦锋 钱广阔 王悦晗 辛静泰 于 2020-05-22 设计创作，主要内容包括：本发明提供一种用于厚带重载卷取机减速箱的换挡机构及使用方法,包括外花键、传动轴、大速比齿轮、小速比齿轮、内花键套、副外花键、瓦环、组合压环、耳轴座、键槽、耳轴、拨叉、长转轴、转轴座一、销轴一、双头关节轴承、调整螺栓、销轴二、转臂一、短转轴、转轴座二、转臂二,组合油缸和支座；所述的外花键套装在传动轴上。本发明针对厚带重载卷取机减速箱转速较低但冲击大的工况,使用整圈面接触的瓦环作为固定换挡内花键套的推力部件,因而可以承受远大于线接触轴承组件承载极限的振动和冲击,实现重载卷取机减速箱换挡机构的超长维护周期。(The invention provides a gear shifting mechanism for a reduction box of a thick-belt heavy-load coiler and a use method, and the gear shifting mechanism comprises an external spline, a transmission shaft, a large-speed-ratio gear, a small-speed-ratio gear, an internal spline sleeve, an auxiliary external spline, a tile ring, a combined compression ring, an trunnion seat, a key groove, a trunnion, a shifting fork, a long rotating shaft, a first rotating shaft seat, a first pin shaft, a double-headed knuckle bearing, an adjusting bolt, a second pin shaft, a first rotating arm, a short rotating shaft, a second rotating shaft seat, a second rotating arm, a combined oil; the external spline is sleeved on the transmission shaft. Aiming at the working condition that the reduction gearbox of the heavy-duty coiler with the thick belt has low rotating speed but large impact, the whole circle of the shoe ring in surface contact is used as the thrust component for fixing the shifting inner spline sleeve, so that the bearing limit of the bearing component of the heavy-duty coiler with the thick belt can bear vibration and impact which are far larger than the bearing limit of the linear contact bearing component, and the overlong maintenance period of the gear shifting mechanism of the reduction gearbox of the heavy-duty coiler is.)

1. A gear shifting mechanism for a reduction gearbox of a heavy-duty coiler is characterized by comprising an external spline (1), a transmission shaft (2), a large-speed-ratio gear (3), a small-speed-ratio gear (4), an internal spline sleeve (5), an auxiliary external spline (6), a bush ring (7), a combined pressure ring (8), a trunnion seat (9), a key groove (10), a trunnion (11), a shifting fork (12), a long rotating shaft (13), a rotating shaft seat I (14), a pin shaft I (15), a double-head knuckle bearing (16), an adjusting bolt (17), a pin shaft II (18), a rotating arm I (19), a short rotating shaft (20), a rotating shaft seat II (21), a rotating arm II (22), and a combined oil cylinder rotating arm (23) and a support (24), wherein the external spline (1) is sleeved on the transmission shaft (2), the large-speed-ratio gear (3) and the small-speed-ratio gear (4) are sleeved on the transmission shaft (2), the external spline (1) and the other end of the shifting fork inner spline sleeve (5) with the same specification and the same width are meshed and can slide relatively, the shifting fork ring (5), the shifting mechanism is arranged on the shifting fork inner spline shaft seat I (7) through the shifting fork ring (7), the shifting fork ring (7), the shifting ring (7) and the shifting fork inner spline shaft seat II (7), the shifting ring (7) are arranged on the shifting fork inner spline shaft seat II, the shifting ring (7), the shifting ring (7) is arranged on the shifting ring (7), the shifting shaft seat II) through the shifting ring (7), the shifting fork shaft seat II) and the shifting ring (7), the shifting fork inner spline shaft seat II (7), the shifting shaft seat II) are arranged in the shifting shaft seat II, the shifting shaft (7), the shifting shaft seat II) through the shifting shaft (7), the shifting shaft seat II (7), the shifting shaft (7) are arranged in the shifting shaft (7), the shifting shaft seat II (7), the shifting shaft seat II (7), the shifting shaft seat II (7) and the shifting shaft (7) are arranged in.

2. The gear shifting mechanism for the reduction gearbox of the thick-belt heavy-load coiler according to the claim 1, is characterized in that: the large-speed-ratio gear (3) and the small-speed-ratio gear (4) are sleeved on the transmission shaft (2) through a pair of tapered roller bearings.

3. The gear shifting mechanism for the reduction gearbox of the thick-belt heavy-load coiler according to the claim 1, is characterized in that: the external spline (1) is sleeved on the transmission shaft (2) and is fixed with the transmission shaft (2) through a flat key.

4. The gear shifting mechanism for the reduction gearbox of the thick-belt heavy-load coiler according to the claim 1, is characterized in that: the combined oil cylinder (23) at least comprises two oil cylinders, and the tail parts of the two oil cylinders are combined together.

5. The gear shifting mechanism for the reduction gearbox of the thick-belt heavy-load coiler according to the claim 1, is characterized in that: and a pipe threaded hole (25) and a through oil hole (26) are further processed on the combined compression ring (8), and a lubricating hose (27) led out from a lubricating pipeline of the reduction gearbox is connected to the through oil hole (26).

6. The gear shifting mechanism for the reduction gearbox of the thick-belt heavy-load coiler according to the claim 1, is characterized in that: the ring (7) of bearing a tile be close to the bight of combination clamping ring (8), process whole ring hoop oil groove (28), evenly arrange 4~6 radial oil grooves (29) of department on ring (7) terminal surface A of bearing a tile and terminal surface B.

7. The gear shifting mechanism for the reduction gearbox of the thick-belt heavy-load coiler according to the claim 1, is characterized in that: two shift forks (12) of long pivot (13) between install cotter (30), the one end of cotter (30) is the round pin, tightly adorns on long pivot (13), the other end is the key, imbeds in keyway (10) of combination clamping ring (8).

8. The gear shifting mechanism for the reduction gearbox of the thick-belt heavy-load coiler according to the claim 1, is characterized in that: the inner spline of the inner spline sleeve (5) is a straight-tooth inner gear ring, and the outer spline (1) matched with the inner spline and the auxiliary outer spline (6) of the large-speed-ratio gear (3) and the small-speed-ratio gear (4) can also be processed into a straight-tooth auxiliary outer gear ring with the same modulus and reference circle diameter.

9. The use method of the gear shifting mechanism for the reduction gearbox of the heavy-duty thick-strip coiler according to any one of claims 1 to 8, is characterized in that: the method comprises the following specific steps: through the phase angle of the rotating arm I (19) and the rotating arm II (22) on the short rotating shaft (20) and the length of the double-end knuckle bearing (17), when one oil cylinder rod of the combined oil cylinder (23) extends out, the inner spline sleeve (5) is just level with the end surface of the outer spline (1) and is separated from gears on two sides, at the moment, two sets of gears of the input shaft (31) can only drive a large-speed-ratio gear (3) and a small-speed-ratio gear (4) which are meshed with the gears to idle, the transmission shaft (2) cannot be driven to rotate, and the gear shifting mechanism is in a neutral position; when the other cylinder rod of the combined oil cylinder (23) is operated to extend out, the long rotating shaft (13) drives the shifting fork (12) to rotate, the trunnion (11) and the combined pressing ring (8) are driven to move axially along the transmission shaft (2), one half of the inner spline sleeve (5) is pushed to slide into the auxiliary outer spline (6) of the small-speed-ratio gear (4), and the other half of the inner spline sleeve is meshed with the outer spline (1); the end surface A and the end surface B of the tile ring (7) are in clearance fit with the outer annular surface of the inner spline sleeve (5) so as to enable the tile ring to slide relatively; when the rotating speed of the internally splined sleeve (5) is higher, circulating lubricating oil can be introduced to perform enhanced lubrication and cooling on the sliding surface A and B; the tile ring (7) and the combined compression ring (8) are in tight fit and are assembled with seam riding pins without relative sliding, and the tile ring, the trunnion (11) and the shifting fork (12) are simultaneously in a fixed state; in this state, the small-speed-ratio gear (4), the internal spline sleeve (5), the external spline (1) and the transmission shaft (2) are combined into a same-speed rotating assembly, so that the purpose of shifting gears to the small-speed-ratio gear pair is realized; when the two cylinder rods of the combined oil cylinder (23) are operated to retract completely, one half of the inner spline sleeve (5) is meshed with the outer spline (1), and the other half of the inner spline sleeve slides into the auxiliary outer spline (6) of the large-speed-ratio gear (3), so that the purpose of shifting gears to the large-speed-ratio gear pair is achieved.

Technical Field

The invention belongs to the field of cold rolling production of metal strip coils, and particularly relates to a gear shifting mechanism for a reduction gearbox of a heavy-load thick strip coiling machine and a using method of the gear shifting mechanism.

Background

The technical process of storing or producing rolled pieces in the next step after the rolled pieces are wound in the modern metal plate strip cold rolling production is quite common. The most important parameter for the winding process is the thickness of the strip, the thicker the strip, the greater the bending stiffness and the greater the difficulty of the winding operation. In conventional metal strip production, the strip is rolled to within 5mm of thickness in a hot rolling stage, and then coiled and fed to a cold rolling stage. However, some of the metal strip production processes require relatively thick strip to be wound in the cold rolling process and some have thicknesses up to 18 mm. Because the strip tension is required to be established in the cold rolling process, the large-reel tension coiler is often used as winding equipment of a thick-strip cold rolling unit due to the tension establishing capacity of the large-reel tension coiler. However, the winding process of the thick strip cold rolling has the characteristics of large strip tension, large bending rigidity, large strip vibration mass and large strip breakage impact, so that the load of the reduction gearbox of the coiling machine is greatly higher than the load level of the production of strips with common thickness.

At present, the common counter measures are to enhance the strength of the gear by increasing the modulus of the transmission gear and the like, but the gear shifting mechanism of the reduction gearbox still adopts the gear shifting mechanism of the conventional coiler reduction gearbox, namely, a pair of bearings are embedded into an external annular groove of a gear shifting internal spline sleeve, an oil cylinder drives a rotating shaft shifting fork mechanism and pushes the bearings, and then a bearing outer ring pushes the internal spline sleeve to switch between gear pairs with different speed ratios, so that the purpose of gear shifting is achieved. When the mechanism works, the gear shifting bearing always rotates along with the rotation of the inner spline housing, and large pressing force and impact force exist between the gear shifting bearing and the outer annular groove side wall of the inner spline housing. When such a shifting mechanism is used in a heavy-duty coiler for thick strips, vibrations and shocks from the outside, the intensity of which often exceeds the normal tolerance limits of the shifting bearings, cause them to break frequently and cause frequent interruptions in production.

Disclosure of Invention

The invention provides a gear shifting mechanism for a reduction box of a heavy-duty thick-belt coiler and a use method thereof, aiming at overcoming the problems that when the gear shifting mechanism is used for the heavy-duty thick-belt coiler, the strength of the gear shifting mechanism from the outside usually exceeds the normal bearing limit of a gear shifting bearing, so that the gear shifting bearing is broken frequently and the production is interrupted frequently.

In order to achieve the purpose, the invention adopts the technical scheme that:

a gear shifting mechanism for a reduction gearbox of a thick belt heavy-load coiler comprises an external spline, a transmission shaft, a large-speed-ratio gear, a small-speed-ratio gear, an internal spline sleeve, an auxiliary external spline, a bush ring, a combined compression ring, an trunnion seat, a key groove, a trunnion, a shifting fork, a long rotating shaft, a first rotating shaft seat, a first pin shaft, a second double-ended knuckle bearing, an adjusting bolt, a second pin shaft, a first rotating shaft, a short rotating shaft, a second rotating shaft seat, a second rotating shaft, a combined oil cylinder and a support, wherein the external spline is sleeved on the transmission shaft, the large-speed-ratio gear and the small-speed-ratio gear are sleeved on the transmission shaft, the external spline is meshed with the internal spline sleeve with the same spline in specification and width and can slide relatively, auxiliary external splines with the same specification are machined on the side faces of the large-speed-ratio gear and the small-speed-ratio gear, the large-ratio gear or the small-speed-ratio gear is combined with the external spline, an annular rectangular flange is arranged in an annular groove on the middle section of the two sides of the two bearing seats, the two bearing seats are sleeved with the two bearing seats, the two bearing seats are arranged on the two ends of the shifting fork shaft seat, the two bearing seats, the two ends of the two bearing seats, the two bearing seats are arranged in the two bearing seats, the two bearing seats are arranged on the two bearing seats, the two ends of the two bearing seats, the two bearing seats are arranged on the two bearing seats, the two bearing seats are arranged on the two bearing seats, the two bearing seats.

The large-speed-ratio gear and the small-speed-ratio gear are sleeved on the transmission shaft through a pair of tapered roller bearings.

The external spline is sleeved on the transmission shaft and is fixed with the transmission shaft through a flat key.

The combined oil cylinder at least comprises two oil cylinders, and the tail parts of the two oil cylinders are combined together.

And a pipe thread hole and a through oil hole are further processed on the combined compression ring, and a lubricating hose led out from a lubricating pipeline of the reduction gearbox is connected to the through oil hole.

The tile ring is close to the corner of the combined compression ring, a whole ring of annular oil grooves are machined, and 4-6 radial oil grooves are uniformly arranged on the end face A and the end face B of the tile ring.

The long rotating shaft is characterized in that a pin key is arranged between the two shifting forks, one end of the pin key is a pin and tightly arranged on the long rotating shaft, and the other end of the pin key is a key and is embedded into a key groove of the combined compression ring.

The inner spline of the inner spline sleeve is a straight-tooth inner gear ring, and the outer spline matched with the inner spline and the auxiliary outer splines of the large-speed-ratio gear and the small-speed-ratio gear can also be processed into a straight-tooth auxiliary outer gear ring with the same modulus and reference circle diameter.

A use method of a gear shifting mechanism for a reduction box of a heavy-duty thick-belt coiler comprises the following specific steps: through the phase angle of the rotating arm I and the rotating arm II on the short rotating shaft and the adjustment of the length of the double-end knuckle bearing, when one oil cylinder rod of the combined oil cylinder extends out, the inner spline sleeve is just flush with the end face of the outer spline and is separated from the gears on two sides, at the moment, two sets of gears of the input shaft can only drive the large-speed-ratio gear and the small-speed-ratio gear which are meshed with the inner spline sleeve to idle, the transmission shaft cannot be driven to rotate, and the gear shifting mechanism is in a neutral position; when the other cylinder rod of the operating combined oil cylinder extends out, the long rotating shaft drives the shifting fork to rotate, so as to drive the trunnion and the combined compression ring to move along the axial direction of the transmission shaft, push half of the inner spline sleeve to slide into the auxiliary outer spline of the small-speed-ratio gear, and keep the other half meshed with the outer spline; the end surface A and the end surface B of the tile ring are in clearance fit with the outer ring surface of the inner spline housing, so that the tile ring and the inner spline housing can slide relatively; when the rotating speed of the internally splined sleeve is higher, circulating lubricating oil can be introduced to perform enhanced lubrication and cooling on the sliding surface A and B; the tile ring and the combined compression ring are in tight fit and are assembled with a seam riding pin, do not slide relatively and are simultaneously fixed with the trunnion and the shifting fork; in this state, the small-speed-ratio gear, the inner spline housing, the outer spline and the transmission shaft are combined into a same-speed rotating assembly, so that the purpose of shifting gears to the small-speed-ratio gear pair is achieved; when the two cylinder rods of the combined oil cylinder are completely retracted, one half of the internal spline sleeve is meshed with the external spline, and the other half of the internal spline sleeve slides into the auxiliary external spline of the high-speed-ratio gear, so that the purpose of shifting gears to the high-speed-ratio gear pair is achieved.

The invention has the beneficial effects that:

1. the bearing ring is made of wear-resistant materials, so that the bearing ring can bear vibration and impact which are far greater than the bearing limit of a line contact bearing assembly, and the overlong maintenance period of a gear shifting mechanism of the heavy-duty recoiling machine reduction gearbox is realized, and even the maintenance period which has the same service life with a transmission gear.

2. The bearing assembly in the gear shifting mechanism of the conventional reduction gearbox is removed, and the fault shutdown probability caused by bearing breakage is greatly reduced, so that the equipment fault rate and the shutdown maintenance time are reduced.

3. Through further optimizing the structure of combination clamping ring and tile ring to all friction surfaces between leading-in tile ring of circulating lubricating oil and the internal spline cover strengthen the lubrication and the cooling effect to the friction surface, improved this gearshift's the suitable upper limit of rotational speed.

4. The combination of the first rotating arm, the second rotating arm, the short rotating shaft and the double-head knuckle bearing is used for carrying out shift driving, the length proportion of the first rotating arm and the second rotating arm is designed, a smaller oil cylinder can be used for pushing a larger and heavier inner spline housing in the heavy-duty speed reducer by using the lever principle, and the meshing position of the inner spline housing and an auxiliary outer spline of the gear can be more finely adjusted by adjusting the length of the double-head knuckle bearing. The scheme of the invention is more accurate and energy-saving than the scheme of directly pushing the long rotating shaft and the shifting fork by using a larger oil cylinder so as to push the internal spline housing.

The following will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is a view of the position of the mechanism of the present invention on the rotating shaft of the reduction gearbox;

FIG. 2 is an axial view of the mechanism of the present invention in a drive shaft;

FIG. 3 is a top view of the phase relationship and shift position between the rotating arm, rotating shaft and fork of the mechanism of the present invention;

FIG. 4 is a partial enlarged view of the lubrication circuit of the composite pressure ring in the mechanism of the present invention;

FIG. 5 is a cross-sectional view of the lubrication oil path of the unitized pressure ring in the mechanism of the present invention;

FIG. 6 is an axial view of the shoe ring of the mechanism of the present invention.

In the figure: 1. an external spline; 2. a drive shaft; 3. a high-speed ratio gear; 4. a small-ratio gear; 5. an inner spline housing; 6. a secondary external spline; 7. a tile ring; 8. combining the compression rings; 9. a trunnion seat; 10. a keyway; 11. a trunnion; 12. a shifting fork; 13. a long rotating shaft; 14. a rotating shaft seat I; 15. a first pin shaft; 16. a double-headed knuckle bearing; 17. adjusting the bolt; 18. a second pin shaft; 19. a first rotating arm; 20. a short rotating shaft; 21. a second rotating shaft seat; 22. a second rotating arm; 23. a combined oil cylinder; 24. a support; 25. a tube threaded hole; 26. an oil hole; 27. lubricating the hose; 28. an annular oil groove; 29. a radial oil groove; 30. a pin key; 31. an input shaft.

Detailed Description