CN216262711U - Combined speed reducer for plate and strip rolling mill - Google Patents
Combined speed reducer for plate and strip rolling mill Download PDFInfo
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- CN216262711U CN216262711U CN202122773197.0U CN202122773197U CN216262711U CN 216262711 U CN216262711 U CN 216262711U CN 202122773197 U CN202122773197 U CN 202122773197U CN 216262711 U CN216262711 U CN 216262711U
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Abstract
The utility model provides a combined speed reducer for a plate and strip rolling mill, which comprises a lower box body, a middle box body, an upper box body, an input gear shaft, a welding large gear, a long output shaft and a short output shaft, wherein the lower box body is provided with a first gear and a second gear; the welding gearwheel is mounted on the long output shaft, and a gear on the input gear shaft is meshed with the welding gearwheel; the herringbone gear on the long output shaft is meshed with the herringbone gear on the short output shaft; the lower box body, the middle box body and the upper box body are fixedly connected from bottom to top in sequence; the input gear shaft is arranged between the lower box body and the middle box body in a matched manner through two groups of bearings and bearing seats; the long output shaft is arranged between the lower box body and the middle box body in a matched manner through three groups of bearings and bearing seats; and the short output shaft is arranged between the middle box body and the upper box body in a matching way through two groups of bearings and bearing seats. The technical scheme of the utility model solves the problems of large occupied space, high equipment investment, difficult maintenance and the like of the original finishing mill transmission device.
Description
Technical Field
The utility model relates to the field of steel rolling equipment, in particular to a combined speed reducer for a plate and strip rolling mill.
Background
At present, a finishing mill transmission device of a medium plate rolling production line generally adopts a form of a motor → a motor coupler → a main speed reducer → an intermediate coupler → a gear base → an output coupler → a finishing mill. Because the adopted equipment is more, the disadvantages of large occupied space, high investment, inconvenient maintenance and the like are caused.
SUMMERY OF THE UTILITY MODEL
According to the technical problems of large occupied space, high equipment investment, difficult maintenance and the like of the original finishing mill transmission device, the combined speed reducer for the plate and strip mill is provided, and the working requirements of different directions and same rotating speeds of the rolls of the finishing mill can be met.
The technical means adopted by the utility model are as follows:
a combined speed reducer for a plate and strip rolling mill comprises a lower box body, a middle box body, an upper box body, an input gear shaft, a welding large gear, a long output shaft and a short output shaft;
the welding large gear is arranged on the long output shaft through a key, and a gear on the input gear shaft is meshed with the welding large gear to form a cylindrical gear pair; the herringbone gear on the long output shaft is meshed with the herringbone gear on the short output shaft to form a herringbone gear pair;
the lower box body, the middle box body and the upper box body are fixedly connected from bottom to top in sequence;
the input gear shaft is arranged between the lower box body and the middle box body in a matched manner through two groups of bearings and bearing seats, the part close to the shaft head of the input gear shaft is arranged through a double-row cylindrical roller bearing in a matched manner with the bearing seats, and the other end of the input gear shaft is arranged through a double-row tapered roller bearing I in a matched manner with the bearing seats;
the long output shaft is installed between the lower box body and the middle box body through three groups of bearings and bearing seats in a matched mode, the output end of the long output shaft is installed through a self-aligning roller bearing III in a matched mode with the bearing seats, the middle position of the long output shaft is installed through a self-aligning roller bearing IV in a matched mode with the bearing seats, and the other end of the long output shaft is installed through a double-row tapered roller bearing II in a matched mode with the bearing seats;
the short output shaft is installed between the middle box body and the upper box body through two groups of bearings and bearing seats in a matched mode, the output end of the short output shaft is installed through a self-aligning roller bearing II in a matched mode, and the other end of the short output shaft is installed through a self-aligning roller bearing I in a matched mode.
Furthermore, the input gear shaft is a single helical tooth cylindrical gear shaft, and the long output shaft and the short output shaft are double helical tooth herringbone gear shafts.
Furthermore, an eccentric sleeve II and an eccentric sleeve I are respectively arranged between the outer ring of the double-row tapered roller bearing I and the corresponding bearing seat and between the outer ring of the double-row cylindrical roller bearing I and the corresponding bearing seat.
Furthermore, a wear-resistant sleeve is arranged between the double-row tapered roller bearing II and the bearing seat.
Furthermore, the input gear shaft is provided with a combined end cover I which is further installed at the position of the double-row cylindrical roller bearing in a non-contact labyrinth sealing mode, the long output shaft is provided with a combined end cover II which is also installed at the position of the self-aligning roller bearing III and the short output shaft in a non-contact labyrinth sealing mode.
Furthermore, the self-aligning roller bearing IV and the self-aligning roller bearing I are arranged in a staggered mode in space.
Further, a clearance groove is arranged between two part tooth surfaces of the herringbone gear on the long output shaft and the short output shaft.
Furthermore, the input gear shaft and the coupler are connected by pure interference key-free connection, and the shaft neck at the connection part is in a stepped shape.
Furthermore, the long output shaft and the short output shaft are connected with the coupler through pure interference key-free connection, and shaft necks at the connection parts are stepped.
Furthermore, the bottom of the lower box body is provided with a protruding part for placing the welding bull gear; when the combined speed reducer is installed, namely the bottom surface of the non-protruding part on the lower box body is an installation surface.
Compared with the prior art, the utility model has the following advantages:
1. the combined speed reducer for the plate strip rolling mill provided by the utility model not only meets the speed ratio requirement of the whole transmission device, but also meets the requirement of double-output shaft different-direction and same-speed output; compared with the original transmission form, the space occupied by the equipment can be reduced, the equipment investment is reduced, and the maintenance is convenient.
2. According to the combined speed reducer for the plate strip rolling mill, the herringbone gears are adopted on the long output shaft and the short output shaft, so that the two output shafts can be ensured to output large enough torque to meet the working requirement of a finishing mill; the input gear shaft and the long output shaft both adopt a supporting mode of 'one end is fixed and one end is floated', the positioning precision of the shaft can be ensured, and the 'fixed end' adopts a double-row tapered roller bearing, so that the bearing capacity of the bearing can be improved, and the service life of the bearing is prolonged.
3. According to the combined speed reducer for the plate strip rolling mill, the box body adopts a sinking structure, so that the size and the weight of the speed reducer are reduced, and the manufacturing cost is reduced.
For the reasons, the utility model can be widely popularized in the fields of steel rolling equipment and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are 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 diagram of the right side surface of a combined speed reducer for a strip mill.
Fig. 2 is a schematic structural diagram of the front side of the combined speed reducer for the strip mill.
Fig. 3 is a transverse sectional view of a combined speed reducer for a strip mill according to the present invention.
Fig. 4 is a longitudinal sectional view of a combined reducer for a strip mill according to the present invention.
In the figure: 1. an upper box body; 2. a middle box body; 3. a lower box body; 4. an eccentric sleeve I; 5. a combined end cover I; 6. an input gear shaft; 7. a cylindrical roller bearing; 8. a cylindrical gear pair; 9. an eccentric sleeve II; 10. a tapered roller bearing I; 11. a key; 12. a tapered roller bearing II; 13. a wear-resistant sleeve; 14. welding the large gear; 15. a self-aligning roller bearing I; 16. a herringbone gear pair; 17. a short output shaft; 18. a self-aligning roller bearing II; 19. a combined end cover II; 20. a self-aligning roller bearing III; 21. a long output shaft; 22. and a self-aligning roller bearing IV.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in fig. 1-4, the utility model provides a combined reducer for a plate and strip rolling mill, which comprises a lower box body 3, a middle box body 2, an upper box body 1, an input gear shaft 6, a welding large gear 14, a long output shaft 21 and a short output shaft 17;
the welding gearwheel 14 is mounted on the long output shaft 21 through a key 11, and a gear on the input gear shaft 6 is meshed with the welding gearwheel 14 to form a cylindrical gear pair 8; the input gear shaft 6 can drive the long output shaft 21 to rotate through the cylindrical gear pair 8;
the herringbone gear on the long output shaft 21 is meshed with the herringbone gear on the short output shaft 17 to form a herringbone gear pair; the speed ratio of the herringbone gear pair 16 is 1: 1; the long output shaft 21 can drive the short output shaft 17 to rotate through the herringbone gear pair 16;
the input gear shaft 6 is a single helical tooth cylindrical gear shaft, and the long output shaft 21 and the short output shaft 17 are double helical tooth herringbone gear shafts;
the lower box body 3, the middle box body 2 and the upper box body 1 are connected through bolts and positioning pins from bottom to top in sequence, the input gear shaft 6 and the long output shaft 21 are respectively installed between the lower box body 3 and the middle box body 2 through a bearing and a bearing seat in a matched mode, and the short output shaft 17 is installed between the middle box body 2 and the upper box body 1 through a bearing and a bearing seat in a matched mode;
the input gear shaft 6 is arranged between the lower box body 3 and the middle box body 2 in a matched mode through two groups of bearings and bearing seats, a supporting mode of 'one end fixed and one end floating' is adopted, the part, close to the shaft head of the input gear shaft 6, of the input gear shaft is arranged through a double-row cylindrical roller bearing 7 in a matched mode and serves as a floating end of the input gear shaft 6, the other end of the input gear shaft is arranged through a double-row tapered roller bearing I10 in a matched mode and serves as a fixed end of the input gear shaft 6, and an eccentric sleeve II 9 and an eccentric sleeve I4 are respectively arranged between the outer rings of the double-row tapered roller bearing I10 and the double-row cylindrical roller bearing 7 and the corresponding bearing seats;
the long output shaft 21 is installed between the lower box body 3 and the middle box body 2 in a matched mode through three groups of bearings and bearing seats, a supporting mode of 'one end fixing and two floating' is adopted, the output end of the long output shaft 21 is installed through a self-aligning roller bearing III 20 matched with the bearing seat and serves as a floating position of the long output shaft 21, the middle position of the long output shaft is installed through a self-aligning roller bearing IV 22 matched with the bearing seat and serves as another floating position of the long output shaft 21, the other end of the long output shaft is installed through a double-row tapered roller bearing II 12 matched with the bearing seat and serves as a fixing end of the long output shaft 21, and a wear-resistant sleeve 13 is installed between the double-row tapered roller bearing II 12 and the bearing seat;
the short output shaft 17 is mounted between the middle box body 2 and the upper box body 1 through two groups of bearings and bearing seats in a matched mode, in addition, a supporting mode of floating at two ends is adopted, the output end of the short output shaft 17 is mounted through a self-aligning roller bearing II 18 in a matched mode with the bearing seats to serve as a floating end of the short output shaft 17, the other end of the short output shaft 17 is mounted through a self-aligning roller bearing I15 in a matched mode with the bearing seats to serve as the other floating end of the short output shaft 17, the short output shaft 17 can freely move along the axial direction, and the specific axial position is determined by the herringbone gear pair 16;
input gear shaft 6 is last to be installed double-row cylindrical roller bearing 7 department still adopts non-contact labyrinth seal mode to install combination end cover I5, install on the long output shaft 21 self-aligning roller bearing III 20 department with install on the short output shaft 17 self-aligning roller bearing II 18 department still adopts non-contact labyrinth seal to install combination end cover II 19, can realize using non-maintaining for a long time through the labyrinth seal mode.
Furthermore, the self-aligning roller bearing IV 22 and the self-aligning roller bearing I15 are arranged in a staggered mode in space so as to meet the installation requirements of the two bearings.
Furthermore, during operation, the input gear shaft 6 and the coupler are connected through pure interference key-free connection, and for reliable connection, the journal at the connection position of the input gear shaft 6 and the coupler is stepped.
Further, during operation, the long output shaft 21 and the short output shaft 17 are connected with the coupler through pure interference key-free connection, and for reliable connection, shaft necks at the connection parts of the two output shafts and the coupler are stepped.
Further, for the convenience of processing the herringbone gear on the long output shaft 21 and the short output shaft 17, a clearance groove is provided between two part of tooth surfaces of the herringbone gear.
Furthermore, the bottom of the lower box body 3 is provided with a protruding part for placing the welding bull gear 14, and the protruding part can reduce the volume of the speed reducer and reduce the manufacturing cost; when the combined speed reducer is installed, the box body is installed in a sinking mode, namely the bottom surface of the non-protruding part on the lower box body 3 is an installation surface.
When the double-shaft double-output gearbox works, the mounting surface of the lower box body 3 is mounted on a strip rolling mill, then the input gear shaft 16 is connected to a motor through a coupler, the long output shaft 21 and the short output shaft 17 are respectively connected with two rollers of the strip rolling mill, after the motor is started, the input gear shaft 6 drives the long output shaft 21 to rotate through the cylindrical gear pair 8, and the long output shaft 21 drives the short output shaft 17 to rotate through the herringbone gear pair 16, so that speed reduction is realized.
The speed reducer combines the main speed reducer and the gear base in the original transmission form into a combined speed reducer, thereby not only meeting the requirement of transmission ratio, but also realizing the output of two output shafts with different directions and same rotating speed. By adopting the herringbone gear, the short output shaft can not be subjected to axial force, so that bearings with small volumes can be adopted at two ends of the short output shaft, and the problem that a proper bearing cannot be selected due to the limitation of the center distance of the output end is solved; the long output shaft is supported by three bearings, so that the rigidity of the shaft is improved, and the meshing efficiency of gears is ensured; through setting up the well box, increased the thickness of box intermediate position bearing frame, make the bearing of long output shaft intermediate position and the inboard bearing of short output shaft can radially stagger and arrange, satisfied the installation requirement of bearing. Meanwhile, by adopting the combined speed reducer, an intermediate coupling can be omitted in a transmission form, so that equipment investment is saved, the space occupied by equipment is reduced, and equipment maintenance is facilitated.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A combined speed reducer for a plate and strip rolling mill is characterized by comprising a lower box body (3), a middle box body (2), an upper box body (1), an input gear shaft (6), a welding large gear (14), a long output shaft (21) and a short output shaft (17);
the welding large gear (14) is arranged on the long output shaft (21) through a key (11), and a gear on the input gear shaft (6) is meshed with the welding large gear (14) to form a cylindrical gear pair (8); a herringbone gear on the long output shaft (21) is meshed with a herringbone gear on the short output shaft (17) to form a herringbone gear pair (16);
the lower box body (3), the middle box body (2) and the upper box body (1) are fixedly connected from bottom to top in sequence;
the input gear shaft (6) is arranged between the lower box body (3) and the middle box body (2) through two groups of bearings and bearing seats in a matching way, the position close to the shaft head of the input gear shaft (6) is arranged through a double-row cylindrical roller bearing (7) in a matching way, and the other end of the input gear shaft is arranged through a double-row tapered roller bearing I (10) in a matching way;
the long output shaft (21) is installed between the lower box body (3) and the middle box body (2) through three groups of bearings and bearing seats in a matched mode, the output end of the long output shaft (21) is installed through a self-aligning roller bearing III (20) in a matched mode and the bearing seats, the middle position of the long output shaft is installed through a self-aligning roller bearing IV (22) in a matched mode and the other end of the long output shaft is installed through a double-row tapered roller bearing II (12) in a matched mode and the bearing seats;
short output shaft (17) through two sets of bearings with the bearing frame cooperation install in well box (2) with go up between the box (1), the output of short output shaft (17) is through the installation of self-aligning roller bearing II (18) cooperation bearing frame, the other end through the installation of self-aligning roller bearing I (15) cooperation bearing frame.
2. A combined reducer for a strip mill according to claim 1, characterised in that the input gear shaft (6) is a single helical gear shaft, and the long output shaft (21) and the short output shaft (17) are double helical gear shafts.
3. A combined reducer for a plate and strip mill according to claim 1, wherein an eccentric sleeve ii (9) and an eccentric sleeve i (4) are respectively installed between the outer ring of the double-row tapered roller bearing i (10) and the outer ring of the double-row cylindrical roller bearing (7) and the corresponding bearing seat.
4. A combined reducer for a plate and strip mill according to claim 1, wherein a wear-resistant sleeve (13) is installed between the double-row tapered roller bearing ii (12) and the bearing block.
5. A combined speed reducer for a strip mill according to claim 1, wherein a combined end cover i (5) is further installed on the input gear shaft (6) at the position where the double-row cylindrical roller bearing (7) is installed by adopting a non-contact labyrinth seal manner, and a combined end cover ii (19) is further installed on the long output shaft (21) at the position where the self-aligning roller bearing iii (20) is installed and on the short output shaft (17) at the position where the self-aligning roller bearing ii (18) is installed by adopting a non-contact labyrinth seal manner.
6. The combined speed reducer for a slab rolling mill according to claim 1, wherein the self-aligning roller bearing iv (22) and the self-aligning roller bearing i (15) are spatially staggered.
7. A combined reducer for a strip mill according to claim 1, characterised in that a clearance is provided between two part of the tooth surfaces of a herringbone gear on the long output shaft (21) and the short output shaft (17).
8. A combined speed reducer for a strip mill according to claim 1, wherein the input gear shaft (6) is connected with the coupling by a pure interference non-key connection, and a shaft neck at the connection is stepped.
9. A combined reducer for a strip mill according to claim 1, wherein the long output shaft (21) and the short output shaft (17) are connected with a coupler by pure interference keyless connection, and the shaft necks at the connection parts are stepped.
10. A combined reducer for a plate and strip mill according to claim 1, wherein a protrusion is arranged at the bottom of the lower box body (3) and used for placing the welding gearwheel (14); when the combined speed reducer is installed, namely the bottom surface of the non-protruding part on the lower box body (3) is an installation surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122773197.0U CN216262711U (en) | 2021-11-12 | 2021-11-12 | Combined speed reducer for plate and strip rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122773197.0U CN216262711U (en) | 2021-11-12 | 2021-11-12 | Combined speed reducer for plate and strip rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216262711U true CN216262711U (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122773197.0U Active CN216262711U (en) | 2021-11-12 | 2021-11-12 | Combined speed reducer for plate and strip rolling mill |
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|---|---|
| CN (1) | CN216262711U (en) |
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2021
- 2021-11-12 CN CN202122773197.0U patent/CN216262711U/en active Active
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