CN212760368U

CN212760368U - Tilting mechanism and pusher tilting gear

Info

Publication number: CN212760368U
Application number: CN202021217778.5U
Authority: CN
Inventors: 李永锋; 郭利芝; 王树伟; 吴健; 王永贵; 赵瑞波; 刘卫民; 韩志刚; 李海涛
Original assignee: Hebei Jinxi Iron And Steel Group Co ltd
Current assignee: Hebei Jinxi Iron And Steel Group Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-03-23
Anticipated expiration: 2030-06-28

Abstract

The utility model provides a tilting mechanism and a pusher tilting gear, which belongs to the technical field of steel rolling equipment, wherein the tilting mechanism comprises a tilting component, the tilting component is arranged on a side push plate of the pusher tilting gear and moves along with the side push plate, the tilting component comprises a tilting hook, the tilting mechanism also comprises a buffer component, and the buffer component is arranged below a working roller way of a cogging mill and is used for bearing the impact when a steel billet is turned down, so that the impact on the working roller way is reduced; the utility model provides a tilting mechanism can effectively protect the work roll table of cogging mill, prolongs its life, reduces the equipment maintenance cost.

Description

Tilting mechanism and pusher tilting gear

Technical Field

The utility model belongs to the technical field of steel rolling equipment, more specifically say, relate to a tilting mechanism and pusher tilting gear.

Background

The push-bed tilting gear is a very important large-scale device on a large-scale steel rolling production line, is arranged at a feed inlet of a cogging mill, can automatically push a blank to the front of a corresponding hole pattern according to the rolling pass and the hole pattern of the cogging mill, positions, straightens and tilts the blank, and then is matched with a working roller way of the cogging mill to accurately feed the blank into the hole pattern of the cogging mill for reciprocating rolling.

The pusher tilting gear consists of a pusher and a tilting mechanism. The turned billet is sent out by the heating furnace and is in a red hot state, and the billet is long and has a rectangular section. When the existing tilting gear is used for tilting, one end angle of a steel billet is generally supported by a tilting hook from bottom to top, and the steel billet is tilted by taking the other end angle as a fulcrum, so that the 90-degree tilting of the steel billet is realized. When the billet is turned over, when the gravity center position of the billet crosses the center line, the billet falls onto the surface of a working roller way of the cogging mill by means of self-weight. The problem that exists is that because the dead weight of the steel billet is very big, the work roll table can be impacted greatly when the steel billet falls on the work roll table, and the service life of the roll shaft and the bearings at the two ends of the roll shaft is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tilting mechanism and pusher tilting gear aims at solving the problem that current tilting mechanism steel billet strikes the work roll table when the tilting.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a tilting mechanism, includes the tilting subassembly, the tilting subassembly is used for setting up in the side push pedal of pusher tilting machine, and follows the motion of side push pedal, the tilting subassembly includes the tilting hook, still includes the buffering subassembly, the buffering subassembly is used for setting up in the work roll table below of cogging mill and accepts the impact when the steel billet turns over and falls, thereby reduces the impact that the work roll table received.

As another embodiment of the present application, the buffer assembly includes a slider and a buffer unit;

the sliding seat is arranged below the working roller way and can move along the width direction of the working roller way;

the buffer unit is fixedly arranged on the sliding seat and comprises a liftable elastic element, the elastic element is used for absorbing impact force generated when the steel billet falls down, and the elastic element is arranged between two adjacent roll shafts of the working roll table.

As another embodiment of the present application, the sliding seat is a rod-shaped member and is parallel to the conveying direction of the working roller bed, and the number of the buffer units is plural and is arranged along the length direction of the sliding seat.

As another embodiment of the present application, the buffer unit further includes a column, an upper sliding sleeve, and a lifting driving mechanism;

the upright post is fixedly arranged on the sliding seat, and the elastic element is a spring and is sleeved on the upright post;

the upper sliding sleeve is sleeved on the upright post in a sliding manner and is positioned above the spring, and the top end of the upper sliding sleeve is used for bearing the impact when the billet falls;

the lifting driving mechanism is used for driving the spring and the upper sliding sleeve to move up and down along the upright post.

As another embodiment of the present application, the lifting driving mechanism includes a lower sliding sleeve and a jacking wedge;

the lower sliding sleeve is sleeved on the upright post in a sliding manner and is positioned below the spring;

the jacking wedge block is arranged on the sliding seat in a sliding mode and used for sliding in the direction perpendicular to the upright post and jacking the lower sliding sleeve by utilizing the wedge surface.

As another embodiment of this application, the upper surface of jacking voussoir is equipped with the restriction groove, the restriction groove includes high-order section, low level section and connection high-order section and low level section just are located the slope section of scarf department, the bottom of lower sliding sleeve be equipped with the fixture block of restriction groove adaptation, the fixture block is used for constraining sliding in the groove, thereby the drive lower sliding sleeve removes downwards.

As another embodiment of this application, be equipped with the slip table on the slide, be equipped with the slide rail on the slip table, the bottom surface of jacking voussoir is equipped with the spout, the jacking voussoir with the help of the spout with slide rail sliding connection.

As another embodiment of this application, the top of going up the sliding sleeve is equipped with the dull and stereotyped that shocks resistance, the dull and stereotyped with go up the sliding sleeve articulated and freely rotate in the confined range that shocks resistance.

As another embodiment of the present application, the limited range is that the anti-shock flat plate is maintained horizontally or the inclination angle is not more than twenty degrees.

Compared with the prior art, the steel turning mechanism provided by the utility model is provided with the buffer component, when a steel billet falls and the lower surface of the steel billet is pounded to the surface of the working roller way, the buffer component can be contacted with the steel billet before the working roller way, and the impact force generated when the steel billet falls is received; when the steel billet continues to fall and contacts the surface of the working roller way, the impact force of the steel billet is completely or mostly absorbed by the buffer assembly, so that the impact on the working roller way is reduced, the working roller way is protected, the service lives of the roller shaft and the bearing are prolonged, and the maintenance cost of equipment is reduced.

The utility model also provides a pusher tilting gear, this pusher tilting gear include first side push pedal, second side push pedal and side push pedal actuating mechanism, and this pusher tilting gear still includes foretell tilting gear, can effectively protect the work roll table of cogging mill during the tilting, prolongs its life, reduces the maintenance cost of equipment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a manipulator tilting machine provided by an embodiment of the present invention;

fig. 2 is a schematic top view of a manipulator tilting machine according to an embodiment of the present invention;

FIG. 3 is a schematic view of the billet being turned up in comparison to FIG. 1;

fig. 4 is a schematic structural diagram of a buffering unit of a tilting mechanism according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an explosion structure at a buffer unit of a tilting mechanism provided by an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a jacking wedge block of a tilting mechanism according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a lower sliding sleeve of a tilting mechanism provided in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a buffer assembly of a tilting mechanism according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a buffer unit with an anti-impact flat plate according to an embodiment of the present invention;

fig. 10 is a schematic view of the shock resistant panel flipped over compared to fig. 9.

In the figure: 11. a first side push plate; 12. a second side push plate; 13. a translational power unit; 14. a first transmission unit; 15. a second transmission unit; 16. a third transmission unit; 21. turning over a steel hook; 22. a stopper; 23. turning over a steel cantilever; 24. driving the cantilever; 25. a long shaft is communicated; 26. driving the hydraulic cylinder; 3. a buffer assembly; 31. a buffer unit; 32. a slide base; 33. a connecting frame; 34. a guide seat; 35. a sliding table; 351. a slide rail; 311. a column; 312. an upper sliding sleeve; 313. a lifting drive mechanism; 3131. a lower sliding sleeve; 3132. jacking a wedge block; 31311. a contact portion; 31312. a clamping block; 31321. a confinement groove; 31322. a chute; 314. a spring; 315. a shock resistant flat plate; 3121. a hinged seat; 4. a working roller way; 41. a roll shaft; 5. and (3) steel billets.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 2 together, the tilting mechanism of the present invention will now be described. The tilting mechanism comprises a tilting component, the tilting component is arranged on a side push plate of the pusher tilting machine and moves along with the side push plate, the tilting component comprises a tilting hook 21, the tilting mechanism further comprises a buffer component 3, and the buffer component 3 is used for being arranged below a working roller way 4 of the cogging mill and bearing impact when a steel billet 5 is turned down, so that the impact on the working roller way 4 is reduced.

Compared with the prior art, the steel turning mechanism provided by the utility model is provided with the buffer component 3, when the steel billet 5 falls and the lower surface of the steel billet is hit against the surface of the working roller way 4, the buffer component 3 can contact the steel billet 5 before the working roller way 4, and the impact force generated when the steel billet 5 falls is received; when the billet 5 continuously falls and contacts the surface of the working roller way 4, the impact force of the billet 5 is completely or mostly absorbed by the buffer assembly 3, so that the impact on the working roller way 4 is reduced, the working roller way 4 is protected, the service lives of the roller shaft 41 and the bearing are prolonged, and the maintenance cost of the equipment is reduced.

The side push plate of the push bed tilting gear comprises a first side push plate 11 and a second side push plate 12, and the tilting gear is arranged on one side push plate; besides the side push plate, the manipulator tilting machine also comprises a translation power unit 13, a first transmission unit 14 and a second transmission unit 15; in addition to the tilting hook 21, the tilting assembly further comprises a stop 22, a tilting cantilever 23, a driving cantilever 24, a through long shaft 25 and a driving hydraulic cylinder 26; the first side push plate 11 and the second side push plate 12 are arranged at two sides of the working roller way 4, the first side push plate 11 is connected with the translation power unit 13 through a first transmission unit 14, the second side push plate 12 is connected with the translation power unit 13 through a second transmission unit 15, and the first side push plate 11 and the second side push plate 12 can be driven by the translation power unit 13 to translate along the width direction of the working roller way 4; the first side push plate 11 and the second side push plate 12 are generally of box-beam structures, the lower surfaces of the first side push plate and the second side push plate are lower than the upper surface of the working roller way 4, but the box body of the box-beam structures is provided with a groove for the roller shaft 41 of the working roller way 4 to pass through, so that the first side push plate 11 and the second side push plate 12 can be translated to any position of the width direction of the working roller way 4, and the billet 5 positioned on the working roller way 4 is positioned at any position of the width direction of the working roller way 4 so as to be aligned with the corresponding hole; meanwhile, the first side push plate 11 and the second side push plate 12 can also be matched to clamp the steel billet 5 in a red hot state, so that the straightening of the steel billet 5 is realized.

In the figures 1 and 2, the tilting assembly is arranged on the first side push plate 11 and translates along with the first side push plate 11; the long shaft 25 is rotationally arranged on the first side push plate 11 and can rotate under the action of a driving hydraulic cylinder 26; a driving cantilever 24 is fixedly arranged on the through long shaft 25, and the driving cantilever 24 is hinged with the pushing end of a driving hydraulic cylinder 26; the through long shaft 25 is also fixedly provided with a plurality of steel turning cantilevers 23, and the upper ends of the steel turning hooks 21 are hinged to the extending ends of the steel turning cantilevers 23; the turnover hook 21 is L-shaped, when the turnover cantilever 23 rotates along with the through long shaft 25, the turnover hook 21 rotates together, and is kept vertical approximately under the action of the stop block 22 and the billet 5 to move up and down; in fig. 1, when the push rod of the driving hydraulic cylinder 26 starts to retract, the through shaft 25 and the tilting cantilever 23 start to rotate clockwise, the extending end of the tilting hook 21 can provide an upward lifting force for one bottom end corner of the billet 5, the billet 5 can be tilted with the other bottom end corner as a fulcrum, the tilting angle of the billet 5 is gradually increased along with the rising of the tilting hook 21, and as shown in fig. 3, when the center of gravity of the billet 5 crosses the center line and is located on the left side of the center line, the billet 5 can fall under the action of the dead weight and hit the top end of the buffer assembly 3; the buffer component 3 enables the billet 5 to contact the surface of the working roller table 4 by reducing the height of the buffer component or reducing the height of the buffer component, and the like, so that the tilting process is completed; when the billet 5 is contacted with the working roller way 4, the impact force generated when the billet is turned over is completely or mostly absorbed by the buffer component 3, so that the impact on the working roller way 4 is reduced; in addition, when the buffer assembly 3 is not arranged, the billet 5 may be turned over due to large inertia, so that the turning angle of the billet 5 is 180 degrees instead of 90 degrees, the steel turning fails, and the buffer assembly 3 can also effectively prevent the situation.

As a specific embodiment of the tilting mechanism of the present invention, please refer to fig. 1 and 2, the buffer assembly 3 includes a sliding seat 32 and a buffer unit 31; the sliding seat 32 is arranged below the working roller way 4 and can move along the width direction of the working roller way 4 so as to adapt to different steel turning positions; the buffer unit 31 is fixed on the slide 32, the buffer unit 31 includes a lifting elastic element for absorbing impact force when the billet 5 falls over, and the elastic element 311 is disposed between two adjacent roller shafts 41 of the working roller table 4. The elastic element can effectively absorb the impact force when the billet 5 falls over. When the steel is to be turned, the elastic element is lifted, and the top end of the buffer unit 31 is higher than the upper surface of the working roller way 4, so that the turned-down steel billet 5 can be contacted with the working roller way 4 in advance; when the billet 5 is hit to the buffer unit 31, the elastic element deforms and absorbs the impact force of the billet 5; after the steel turning is finished, the elastic element resets.

Specifically, the sliding seat 32 can be connected with the translational power unit 13 through the third transmission unit 16, so as to realize movement along the width direction of the working roller table 4; the third transmission unit 16 can be a rack and is engaged with a gear integrated in the translational power unit 13, and drives the sliding seat 32 to move in cooperation with a guide mechanism for supporting and guiding the sliding seat 32; the slide 32 is lower than the first side push plate 11 and the second side push plate 12 to prevent interference during movement.

As a specific embodiment of the tilting mechanism of the present invention, please refer to fig. 1 and fig. 2, the sliding seat 32 is a rod-shaped member and is parallel to the conveying direction of the working roller table 4, and the number of the buffering units 31 is plural and is arranged along the length direction of the sliding seat 32. When the billet 5 falls, the plurality of buffer units 31 can receive different positions of the billet 5, so that the buffer force received by the billet 5 is sufficient and uniform, and the billet 5 can be stably kept in an expected position during turning.

Specifically, in order to provide sufficient turning moment, the turning hooks 21 are also provided in plurality, each turning hook 21 is provided with a pair of turning cantilevers 23, and the inner side surface of the first side push plate 11 is provided with a vertical slot for accommodating the turning hook 21. The buffer units 31 and the turnover hooks 21 are both disposed in the gaps of the roller shafts 41, and generally, the buffer units 31 and the turnover hooks 21 are alternately disposed in different gaps.

As a specific embodiment of the tilting mechanism of the present invention, please refer to fig. 4 and 5, the buffer unit 31 further includes a column 311, an upper sliding sleeve 312 and a lifting driving mechanism 313; the upright column 311 is fixedly arranged on the sliding seat 32, and the elastic element is a spring 314 and is sleeved on the upright column 311; the upper sliding sleeve 312 is slidably sleeved on the upright post 311 and is positioned above the spring 314, and the top end of the upper sliding sleeve 312 is used for bearing impact when the billet 5 falls down; the lifting driving mechanism 313 is used for driving the spring 314 and the upper sliding sleeve 312 to move up and down along the upright post. Specifically, the upper end of the spring 314 is fixedly connected with the bottom end of the upper sliding sleeve 312; when the spring 314 is in a natural state, the top end of the upper sliding sleeve 312 is higher than the top end of the upright column 311, and the billet 5 smashes the upper sliding sleeve 312, the upper sliding sleeve 312 has a downward moving space, so that the spring 314 can be compressed, and a buffering force is generated.

As a specific embodiment of the turn-up mechanism of the present invention, please refer to fig. 4 and 5, the lifting driving mechanism 313 includes a lower sliding bush 3131 and a lifting wedge 3132; the lower sliding sleeve 3131 is slidably sleeved on the upright post 311 and is located below the spring 314; the lifting wedge 3132 is slidably disposed on the sliding base 32, and the lifting wedge 3132 is configured to slide in a direction perpendicular to the upright column 311 and lift the lower sliding bush 3131 by using a wedge surface.

The impact force generated when the billet 5 strikes the upper slide sleeve 312 is transmitted to the elevation drive mechanism 313, and the impact force still exerts an adverse effect on the elevation drive mechanism 313 despite the buffering of the spring 314. By using the jacking wedge 3132 to provide a jacking driving force, the upper surface of the jacking wedge 3132 can bear a large impact force, thereby ensuring a stable and reliable structure. In fig. 4 and 5, the upper slipcover 312 and the spring 314 are in a raised state. Under the action of its own weight, the bottom end of the lower bush 3131 contacts the upper surface of the lifting wedge 3132, and when the lifting wedge 3132 slides in the opposite direction, the lower bush 3131 slides down from the upper end to the lower end of the inclined wedge surface, so that the upper bush 312 and the spring 314 are lowered.

Specifically, the structure of the jacking wedge 3132 is as shown in fig. 6, a U-shaped groove for accommodating the upright post 311 is formed in the jacking wedge 3132, so that the jacking wedge 3132 can slide smoothly; as shown in fig. 7, both side surfaces of the bottom end of the lower bush 3131 are provided with contact portions 31311 so as to be sufficiently contacted with the upper surface of the lifting wedge 3132. Specifically, as shown in fig. 8, the jacking wedges 3132 of all the buffering units 31 on the sliding base 32 are connected with the guide bases 34 fixed on the sliding base 32 through the connecting frame 33; meanwhile, a power unit for driving the jacking wedge 3132 to slide is fixedly arranged on the sliding seat 32, and a power output end of the power unit is connected with the connecting frame 33; the power unit can be an electric motor or a hydraulic cylinder and the like.

As a specific embodiment of the tilting mechanism of the present invention, please refer to fig. 6 and 7, the upper surface of the jacking wedge 3132 is provided with a constraining groove 31321, the constraining groove 31321 includes a high-level section, a low-level section, and an inclined section connecting the high-level section and the low-level section and located at the wedge surface, the bottom end of the lower sliding bush 3131 is provided with a clamping block 31312 adapted to the constraining groove 31321, the clamping block 31312 is used for sliding in the constraining groove 31321, so as to drive the lower sliding bush 3131 to move downward. Compare and make lower sliding sleeve 3131 remove downwards through the dead weight, drive lower sliding sleeve 3131 through fixture block 31312 and restraint groove 31321 and slide downwards, improved stability, prevent that lower sliding sleeve 3131 from blocking the unable circumstances that descends because of the accident and appearing, guarantee to go up sliding sleeve 312 and spring 314 and can descend after the steel turnover is accomplished, buffer unit 31 breaks away from with steel billet 5, and steel billet 5 can advance smoothly under the transport of work roll table 4, gets into the blooming mill. Specifically, the upper and lower ends of the spring 314 are fixedly connected to the upper sliding bush 312 and the lower sliding bush 3131, respectively, and when the lower sliding bush 3131 is driven to descend while the jacking wedge 3132 slides, the spring 314 and the upper sliding bush 312 can descend together therewith.

As a specific implementation manner of the steel turning mechanism provided in the present invention, please refer to fig. 4 and fig. 6, a sliding table 35 is disposed on the sliding base 32, a sliding rail 351 is disposed on the sliding table 35, a sliding groove 31322 is disposed on a bottom surface of the jacking wedge 3132, and the jacking wedge 3132 is slidably connected to the sliding rail 351 via the sliding groove 31322, so as to ensure that the jacking wedge 3132 can slide perpendicular to the upright column 311, so as to drive the upper sliding sleeve 312 and the spring 314 to ascend or descend.

As a specific embodiment of the tilting mechanism of the present invention, please refer to fig. 9, a shock-resistant plate 315 is disposed at the top end of the upper sliding sleeve 312, and the shock-resistant plate 315 is hinged to the upper sliding sleeve 312 and freely rotates within a limited range. Fig. 10 shows a schematic view of the rotation of the anti-shock plate 315. The steel billet 5 is not completely turned over, namely, the steel billet is contacted with the anti-impact flat plate 315, at this time, the lower surface of the steel billet 5 is not in a horizontal state, and the rotatable anti-impact flat plate 315 is arranged to ensure that the impact force transmitted to the buffer unit 31 is approximately in a vertical state, which is beneficial to ensuring the structural stability of the buffer unit 31. Specifically, the above-mentioned limited range is that the anti-impact flat plate 315 is kept horizontal or the inclination angle does not exceed twenty degrees, and the rotation range of the anti-impact flat plate 315 cannot be too large; be equipped with articulated seat 3121 on the upper sliding sleeve 312, the upper portion end angle of articulated seat 3121 can contradict the lower surface of the dull and stereotyped 315 that shocks resistance to spacing its rotation prevents that it from rotating excessively.

The utility model also provides a pusher tilting gear, as shown in FIG. 1, this pusher tilting gear includes first side push pedal 11, second side push pedal 12 and side push pedal actuating mechanism, and this pusher tilting gear still includes foretell tilting gear, can effectively protect cogging mill's work roll table 4 during the tilting, prolongs its life, reduces the maintenance cost of equipment. The side push plate driving mechanism comprises a translation power unit 13, a first transmission unit 14 and a second transmission unit 15.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Tilting mechanism, including the tilting subassembly, the tilting subassembly is used for setting up on the side push pedal of manipulator tilting gear, and follows the side push pedal motion, the tilting subassembly is including tilting hook, its characterized in that: the steel turning mechanism further comprises a buffer assembly, and the buffer assembly is arranged below a working roller way of the cogging mill and used for bearing impact when the steel billet turns down, so that the impact on the working roller way is reduced.

2. The tipping mechanism of claim 1, wherein the buffer assembly comprises:

3. The tilting mechanism according to claim 2, wherein said carriage is a rod-shaped member and is parallel to a conveying direction of said work table, and said buffer units are plural in number and arranged along a length direction of said carriage.

4. The tipping mechanism of claim 2, wherein the buffer unit further comprises:

the upper sliding sleeve is sleeved on the upright post in a sliding manner and is positioned above the spring, and the top end of the upper sliding sleeve is used for bearing the impact when the billet falls down;

and the lifting driving mechanism is used for driving the spring and the upper sliding sleeve to move up and down along the upright post.

5. The tipping mechanism of claim 4, wherein the lift drive mechanism comprises:

and the jacking wedge block is arranged on the sliding seat in a sliding manner and used for sliding along the direction vertical to the upright post and jacking the lower sliding sleeve by utilizing a wedge surface.

6. The tilting mechanism of claim 5, wherein the upper surface of the jacking wedge block is provided with a restraining groove, the restraining groove comprises a high section, a low section and an inclined section connecting the high section and the low section and located at the wedge surface, and the bottom end of the lower sliding sleeve is provided with a fixture block matched with the restraining groove, and the fixture block is used for sliding in the restraining groove so as to drive the lower sliding sleeve to move downwards.

7. The tilting mechanism according to claim 5, wherein a sliding platform is provided on the sliding base, a sliding rail is provided on the sliding platform, a sliding groove is provided on a bottom surface of the jacking wedge block, and the jacking wedge block is slidably connected with the sliding rail through the sliding groove.

8. The tilting mechanism of claim 4, wherein the top end of the upper sliding sleeve is provided with an anti-impact flat plate, and the anti-impact flat plate is hinged with the upper sliding sleeve and can rotate freely within a limited range.

9. The tipping mechanism of claim 8, wherein the limited range is that the shock resistant platform remains horizontal or the angle of inclination does not exceed twenty degrees.

10. A push-bed tilting gear comprising a first side push plate, a second side push plate and a side push plate driving mechanism, characterized by further comprising the tilting mechanism of any one of claims 1 to 9.