Centralized transmission three-side rib cold-rolled ribbed steel bar box type rolling mill and production line
By using a centralized drive three-sided ribbed cold-rolled steel bar box mill, the problems of complex traditional processes and structural defects in the mill have been solved, achieving efficient and reliable transmission of the mill and improving product quality.
Patent Information
- Application Number
- CN202421904431.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The traditional three-sided ribbed cold-rolled steel bar production process is complex and cumbersome, making it difficult to guarantee product quality. Flaws in the mill structure design lead to easy damage to the roll shaft, low transmission efficiency and poor reliability, which cannot meet the standard requirements.
The three-sided ribbed cold-rolled steel bar box mill adopts a centralized transmission method. The active and driven roll shaft groups are driven by bevel gears. The bearings bear the load evenly. The roll shaft and bearing mounting structure is robust and reliable. The transmission power is balanced and efficient. The mill structure is exquisite and compact.
It achieves efficient and reliable transmission of the rolling mill, long service life of the roll shaft and bearings, simplifies installation and maintenance, and improves product quality and production efficiency.
Smart Images
Figure CN223603116U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to steel cold rolling equipment technical field, especially in a centralized transmission three -dimensional rib cold rolling ribbed steel box type rolling mill and production line. BACKGROUND
[0002] Three -dimensional rib cold rolling ribbed steel is adopt hot rolling ordinary carbon steel or low alloy steel wire rod to do raw material, under normal temperature condition, through the reducing diameter and the two rolling processes of ribbing rolling mill rolling, the product with three -dimensional crescent shape horizontal rib is rolled on its surface.
[0003] Three -dimensional rib cold rolling ribbed steel production has been used drawing type rolling process for a long time. The rolling mill in the rolling process of drawing type rolling process has no power input, and is passive rolling. The rolling power is realized in the deformation processing of the steel in the rolling process by the drawing method of the coiling drum type power mechanism set after the rolling mill. And dry powder lubricating mechanism is set before the two rolling processes of reducing diameter and ribbing to reduce the rolling friction. Coiling drum type power mechanism is set after the rolling process. Therefore, the traditional three -dimensional rib cold rolling ribbed steel production process is complex, tedious and has many processes. After the rolling production of the steel shape, the finished product can only be collected by active coiling. The heat treatment process cannot be installed and used between the rolling process and the finished product process to adjust the final performance of the product. Usually, the final product performance can only be passively and roughly adjusted by changing the performance of the raw material, distributing the deformation amount of rolling and setting mechanical winch after the rolling process. Therefore, the product quality of the traditional three -dimensional rib cold rolling ribbed steel production process cannot guarantee the process performance of the delivery product, and cannot meet the standard requirements.
[0004] Only in the data has seen the active three rib cold rolled ribbed steel production process, the rolling mill through the motor driven shaft, and through the drive shaft driven by two passive split straight bevel gear shaft group at the same time, so as to drive the three rolling roller respectively installed in a driven shaft, two passive shaft and mutual 120 degrees angle rotating, steel in the center hole type composed of three rolling roller forming. The two driven shaft of the active rolling mill speed mechanism is composed of two split gear set, the structure is complex; its concentrated stress roller shaft is cantilever structure, so the driven roller shaft is prone to breakage and damage, the shaft and bearing in the unilateral double support bearing seat are always in the lever force state, the shaft, bearing and bearing seat are damaged due to uneven stress, the design flaw is obvious for the most important rolling mill body in the rolling mill; in addition, the two driven shaft of the bevel gear set is huge due to the transmission of axial force, although the thrust bearing is installed at the shaft end, the axial force will ultimately be transmitted to the suspended installation of bevel gear set box, which is the bevel gear set box with large load and always loaded in the rolling process, the overall structure design flaw is obvious; in addition, the straight tooth transmission mode is applied to the cold rolling steel rolling mill with large rolling force, the torque transmission stability is poor, the transmission efficiency is low, and the reliability is poor; at the same time, the connection between the main drive motor and the speed reducer of the process is adopted by the belt pulley transmission mode, which has the fatal defects of slipping and no accurate speed control. Therefore, so far, in all three rib cold rolled ribbed steel rolling production, there is no practical application. Utility model content
[0005] The technical problem to be solved by the utility model is to provide a centralized transmission three rib cold rolled ribbed steel box type rolling mill and production line.
[0006] To solve the above technical problem, the utility model provides the following technical scheme:
[0007] On the one hand, a centralized transmission three rib cold rolled ribbed steel box type rolling mill is provided, which comprises a rolling mill shell, one active roller shaft group and two driven roller shaft groups, the active roller shaft group and the two driven roller shaft groups are assembled in the rolling mill shell, and the included angle between the axis of the active roller shaft group and the two driven roller shaft groups is 60 degrees.
[0008] The active roller shaft group comprises a driving shaft, a driving shaft bevel gear and a driving shaft roller, the driving shaft bevel gear and the driving shaft roller are sleeved on the driving shaft.
[0009] The driven roller shaft group comprises a fixed shaft, a fixed shaft bevel gear and a fixed shaft roller, the fixed shaft bevel gear and the fixed shaft roller are rotatably arranged on the fixed shaft, the driving shaft bevel gear is engaged with the fixed shaft bevel gear, and the fixed shaft bevel gear is connected with the fixed shaft roller.
[0010] Optionally, the driving shaft bevel gear and the fixed shaft bevel gear are helical bevel gears.
[0011] Optionally, the two driving shaft bevel gears on both sides of the driving shaft are left-handed bevel gears and right-handed bevel gears, the fixed shaft bevel gear meshing with the left-handed bevel gear is a right-handed bevel gear, and the fixed shaft bevel gear meshing with the right-handed bevel gear is a left-handed bevel gear.
[0012] Optionally, the two ends of the fixed shaft are fixed to the rolling mill shell through fasteners.
[0013] Optionally, the end of the fixed shaft away from the driving shaft is fixedly installed on the inner side of the rolling mill shell through a bolt, and the other end is pressed against the inner side of the rolling mill shell in a slope structure.
[0014] Optionally, the rolling mill shell comprises two shell bodies connected detachably.
[0015] Optionally, the driving shaft is rotatably connected to the rolling mill shell, and the shaft head of the driving shaft extends out of the rolling mill shell and is connected to the torque input shaft through a shaft coupling.
[0016] Optionally, the outer ring of the fixed shaft is fixedly installed with a fixed shaft bearing, the fixed shaft bearing is installed with a tapered roller bearing close to the driving shaft, the tapered roller bearing is installed with a bevel gear sleeve of the fixed shaft bevel gear on the upper surface, the sleeve extending out of the bevel gear sleeve covers the fixed shaft bearing, and the fixed shaft roller is installed on the sleeve extending out of the bevel gear sleeve.
[0017] Optionally, the fixed shaft bevel gear sleeve is perpendicular to the center line of the fixed shaft, and is fixedly installed on the upper surface of the tapered roller bearing, and the sleeve extending out of the fixed shaft bevel gear sleeve covers the fixed shaft bearing.
[0018] In another aspect, a centralized transmission three-side rib cold-rolled ribbed steel bar production line is provided, comprising the centralized transmission three-side rib cold-rolled ribbed steel bar box-type rolling mill of any one of the above.
[0019] Compared with the prior art, the utility model has at least the following beneficial effects:
[0020] In the above scheme, the rolling mill provided by the utility model adopts the centralized transmission mode, so that the rolling mill is precisely assembled as a whole, is small and exquisite in size; the bearings symmetrically installed on the driven roller shaft can ensure balanced bearing of the roller shaft and the bearings during the work of the roller, no axial force, the roller shaft is not easy to break and damage, the service life of the bearings is long, and the installation structure is firm and reliable; the driven roller shaft is fixedly supported at both ends, the transmission axial force is borne by the adjusting bolt and conducted to the rolling mill shell and then decomposed to the rolling mill frame, so that balanced bearing of the roller shaft and the bearings during the work of the roller can be ensured, the roller shaft is not easy to break and damage, the service life of the bearings is long, and the installation structure is firm and reliable; the bevel gear transmission mode is adopted to ensure balanced and efficient conduction of the transmission power.
[0021] The transmission structure of the three roller shafts is centrally enclosed in a box type structure, the installation space is small, the external structure is simple, the inside is not easy to be polluted, and the gear set works in a good environment. Overall, the rolling mill structure is exquisite and small, the manufacturing cost is low, batch assembly and configuration are facilitated, so that rapid replacement, offline assembly or offline maintenance and repair can be realized. BRIEF DESCRIPTION OF DRAWINGS
[0022] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the utility model and, together with the description, further serve to explain the principles of the utility model and enable a person skilled in the relevant art to implement and use the utility model.
[0023] Figure 1 It is a sectional view structure schematic diagram of the centralized transmission three-face rib cold-rolled ribbed steel bar box type rolling mill;
[0024] Figure 2 It is a sectional view structure schematic diagram of the centralized transmission three-face rib cold-rolled ribbed steel bar box type rolling mill except the rolling mill shell;
[0025] Figure 3 It is a sectional view structure schematic diagram of the rolling mill shell;
[0026] Figure 4 It is a sectional view structure schematic diagram of the driving shaft assembly;
[0027] Figure 5 It is a sectional view structure schematic diagram of the driving shaft bevel gear;
[0028] Figure 6 It is a sectional view structure schematic diagram of the fixed shaft one assembly;
[0029] Figure 7 It is a sectional view structure schematic diagram of the fixed shaft bevel gear.
[0030] REFERENCE SIGNS:
[0031] 1, driving shaft; 2, fixed shaft one; 3, rolling mill shell; 4, needle bearing; 5, roller; 6, fixed shaft two; 7, fixed shaft bevel gear; 8, shaft head; 9, driving shaft bevel gear; 10, fixed shaft roller.
[0032] As shown in the drawings, in order to clearly realize the structure of the embodiments of the utility model, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the utility model in the specific structure, device and environment, and the devices and environment can be adjusted or modified by those skilled in the art according to specific needs. DETAILED DESCRIPTION
[0033] The centralized transmission three-face rib cold-rolled ribbed steel box mill provided by the utility model will be described in detail below in combination with the drawings and specific embodiments. It should be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the utility model.
[0034] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize such feature, structure or characteristic in combination with other embodiments (whether or not explicitly described).
[0035] Generally, the terms can be understood at least in part from the context in which they are used. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics, in the plural, without necessarily forcing a single feature, structure, or characteristic to exist. In addition, the term "based on" can be understood as not necessarily requiring a set of exclusive factors, but instead, can allow for existence of additional factors not explicitly described, again, depending at least in part on the context.
[0036] It can be understood that the meanings of "on", "above" and "over" in the utility model should be interpreted in the broadest way, so that "on" not only means "directly on" something, but also includes the meaning of "on" something with intervening characteristics or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of "above" or "over" something without intervening characteristics or layers therebetween.
[0037] In addition, spatially relative terms, such as "under", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0038] As Figures 1 to 7 The embodiment of the utility model provides a centralized drive three -sided rib cold -rolled ribbed steel box type rolling mill, including rolling mill shell 3, one drive roll axle group and two driven roll axle group, drive roll axle group and two driven roll axle group total assembly in rolling mill shell 3, and drive roll axle group and two driven roll axle group axial angle between each other is 60 degrees, drive roll axle group includes drive shaft 1, drive shaft bevel gear and drive shaft roll 5, drive shaft bevel gear and drive shaft roll 5 all are sleeved on drive shaft 1, driven roll axle group includes fixed shaft, fixed shaft bevel gear 7 and fixed shaft roll 10, fixed shaft bevel gear 7 and fixed shaft roll 10 all rotatable be provided on fixed shaft, drive shaft bevel gear and fixed shaft bevel gear 7 are engaged, and fixed shaft bevel gear 7 is connected with fixed shaft roll 10.
[0039] In the above scheme, the rolling mill provided by the utility model adopts a centralized drive mode, so that the whole rolling mill is precisely assembled, small in size and exquisite in structure; the bearings symmetrically installed on the drive roll shaft can ensure balanced loading of the roll shaft and the bearings during rolling mill operation and no axial force, so that the roll shaft is not easy to break and damage, the service life of the bearings is long, and the installation structure is firm and reliable; the driven roll shaft is fixedly supported at both ends, the transmission axial force is borne by the adjusting bolt and conducted to the rolling mill housing and then decomposed to the rolling mill frame, so that balanced loading of the roll shaft and the bearings during rolling mill operation can be ensured, the roll shaft is not easy to break and damage, the service life of the bearings is long, and the installation structure is firm and reliable; the bevel gear transmission mode ensures balanced and efficient conduction of transmission power.
[0040] The transmission structures of the three roll shafts are centrally enclosed in a box structure, so that the installation space is small, the external structure is simple, the interior is not easy to be polluted, and the gear set has a good working environment. Overall, the rolling mill is exquisite in structure, small in size, low in manufacturing cost and convenient for batch assembly and configuration, so that rapid replacement, offline assembly or offline maintenance and repair can be realized.
[0041] Optionally, the rolling mill housing 3 includes two detachably connected shell bodies.
[0042] Optionally, the driving shaft 1 is rotatably connected to the rolling mill shell 3, and the driving shaft 1 has an end shaft head 8 extending out of the rolling mill shell 3 and connected to a torque input shaft through a coupling.
[0043] Optionally, the fixed shaft outer ring is fixedly installed with a fixed shaft bearing, the fixed shaft bearing is installed with a tapered roller bearing close to one side of the driving shaft 1, the tapered roller bearing is installed with a bevel gear sleeve of the fixed shaft bevel gear 7, a sleeve extending out of the bevel gear sleeve covers the fixed shaft bearing, and the fixed shaft roll 10 is installed on the sleeve extending out of the bevel gear sleeve.
[0044] Optionally, the fixed shaft bevel gear 7 is perpendicular to the center line of the fixed shaft, and the fixed shaft bevel gear 7 is installed on the tapered roller bearing.
[0045] Specifically, the centralized transmission three-face rib cold rolled ribbed steel box mill comprises a driving roll shaft group and two driven roll shaft groups, the driving roll shaft group and the driven roll shaft groups are assembled in a rolling mill shell 3 divided into front and rear two pieces to form a box mill. The centralized transmission installation mode makes the whole rolling mill assembly precise, small and exquisite, and more efficient in actual production and assembly process. The transmission structure of the three roll shafts is centralized and closed in a box structure, the installation space is small, the external structure is simple, the interior is not easy to be polluted, and the gear set works in a good environment. Overall, the rolling mill structure is small and exquisite, the manufacturing cost is low, and it is convenient for batch assembly and configuration, so that rapid replacement, offline assembly or offline maintenance and repair can be realized. The driving roll shaft group comprises a driving shaft 1, a driving shaft roll, two sets of driving shaft bearings, and two driving shaft bevel gears 9. The driving roll shaft group is horizontally arranged, the driving shaft 1 has an end shaft head 8 extending out of the rolling mill shell 3 and connected to a torque input shaft through a coupling. The driving shaft outer ring is fixedly installed with a driving shaft roll, and the driving shaft roll is symmetrically installed with a driving shaft bevel gear 9 on both sides of the center of the driving shaft roll. The driving shaft is installed with a driving shaft bearing symmetrically on both ends of the center line of the driving shaft roll. The symmetrically installed bearings on the driving roll shaft can ensure balanced bearing of the roll shaft and the bearing during roll work, no axial force, the roll shaft is not easy to break and damage, the service life of the bearing is long, and the installation structure is firm and reliable. The driven roll shaft is fixedly supported at both ends, the transmission axial force is borne by the adjusting bolts and conducted to the rolling mill shell and then decomposed to the rolling mill frame, so as to ensure balanced bearing of the roll shaft and the bearing during roll work, the roll shaft is not easy to break and damage, the service life of the bearing is long, and the installation structure is firm and reliable. Each driven roll shaft group comprises a fixed shaft 2, a fixed shaft roll, a fixed shaft bearing, a tapered roller bearing, and a fixed shaft bevel gear 7. The two fixed shaft axes are at an angle of 60° with the driving shaft axis, and the angle between the axes of the first fixed shaft 2 and the second fixed shaft 6 is 60°.
[0046] Optionally, the two ends of the fixed shaft are fixed to the rolling mill shell 3 through fasteners.
[0047] Optionally, the fixed shaft is fixedly installed inside the rolling mill shell 3 by bolts at one end away from the driving shaft 1, and is pressed against the inside of the rolling mill shell by a bevel structure at the other end.
[0048] The fixed shaft bearing is fixedly installed at the center of the outer ring of the fixed shaft, and a tapered roller bearing is installed near the driving shaft side of the fixed shaft bearing. A bevel gear sleeve of the fixed shaft bevel gear 7 is installed on the tapered roller bearing. A sleeve extending from the bevel gear sleeve covers the fixed shaft bearing. The fixed shaft roll 10 is installed on the sleeve extending from the bevel gear sleeve. The fixed shaft is fixedly installed on the rolling mill shell 3 inside the rolling mill shell by bolts at one end away from the driving shaft, and is pressed against the inside of the rolling mill shell by a bevel structure at the other end. Compared with the conventional suspended installation method, this installation method has better stability and higher installation efficiency.
[0049] The driving shaft bevel gear is fixedly installed perpendicular to the center line of the driving shaft. The driving shaft bearing and the fixed shaft bearing are both needle bearings 4. The fixed shaft bevel gear is fixedly installed perpendicular to the center line of the fixed shaft. The two driving shaft bevel gears of the driving roll set are engaged with the two fixed shaft bevel gears, respectively. The bevel gear transmission mode ensures balanced and efficient transmission of driving power.
[0050] The fixed shaft bevel gear sleeve is perpendicular to the center line of the fixed shaft and is fixedly installed on the tapered roller bearing. The sleeve extending from the fixed shaft bevel gear sleeve covers the fixed shaft bearing. This installation method makes the overall assembly of the rolling mill precise, compact and exquisite.
[0051] The diameter of the steel bar hole between the driving shaft roll and the fixed shaft roll ranges from 6 to 12 mm.
[0052] Optionally, the driving shaft bevel gear and the fixed shaft bevel gear 7 are both spiral bevel gears.
[0053] Optionally, the two driving shaft bevel gears on both sides of the driving shaft roll 5 are left-handed bevel gears and right-handed bevel gears, respectively. The fixed shaft bevel gear 7 engaged with the left-handed bevel gear is a right-handed bevel gear, and the fixed shaft bevel gear 7 engaged with the right-handed bevel gear is a left-handed bevel gear.
[0054] The two driving shaft bevel gears on both sides of the driving shaft roll are left-handed bevel gears and right-handed bevel gears, respectively. The fixed shaft bevel gear engaged with the left-handed bevel gear is a right-handed bevel gear, and the fixed shaft bevel gear engaged with the right-handed bevel gear is a left-handed bevel gear.
[0055] The working principle of the technical scheme is as follows: the external torque input shaft inputs torque to the driving shaft, when the driving shaft rotates, the driving shaft roller and the two driving shaft bevel gears rotate, the two driving shaft bevel gears drive the two fixed shaft bevel gear sleeves to rotate, the two fixed shaft bevel gear sleeves drive the fixed shaft rollers to rotate synchronously, the two fixed shafts are fixed on the rolling mill shell and do not rotate, the reinforcing steel bars pass through the reinforcing steel bar holes, and three-face rib rolling is realized.
[0056] The utility model further provides a centralized transmission three-face rib cold-rolled ribbed steel bar production line, including the centralized transmission three-face rib cold-rolled ribbed steel bar box type rolling mill of any preceding item.
[0057] The working principle of the technical scheme is as follows: the external torque input shaft inputs torque to the driving shaft, when the driving shaft rotates, the driving shaft roller and the two driving shaft bevel gears rotate, the two driving shaft bevel gears drive the two fixed shaft bevel gear sleeves to rotate, the two fixed shaft bevel gear sleeves drive the fixed shaft rollers to rotate synchronously, the two fixed shafts are fixed on the rolling mill shell and do not rotate, the reinforcing steel bars pass through the reinforcing steel bar holes, and three-face rib rolling is realized.
[0058] The utility model covers any alternative, modification, equivalent method and scheme made on the essence and range of the utility model. In order to make the public have the thorough understanding of the utility model, the specific details are explained in the following preferred embodiment of the utility model, and the utility model can be completely understood without the description of these details for the person skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the utility model, the well-known method, process, flow, element and circuit etc. are not explained in detail.
[0059] The above only is the preferred implementation mode of the utility model, and it should be pointed out that for ordinary technical personnel in the prior art, on the premise that the principle of the utility model is not departed from, a plurality of improvements and refinements can also be made, and these improvements and refinements should be regarded as the protection range of the utility model.
Claims
1. A centralized drive three-sided rib cold rolled ribbed steel bar box mill characterized in that, The rolling mill comprises a rolling mill shell, a driving roller shaft group and two driven roller shaft groups, the driving roller shaft group and the two driven roller shaft groups are assembled in the rolling mill shell, and the angle between the axes of the driving roller shaft group and the two driven roller shaft groups is 60 degrees; The driving roller shaft group comprises a driving shaft, a driving shaft bevel gear and a driving shaft roller, the driving shaft bevel gear and the driving shaft roller are sleeved on the driving shaft; The driven roller shaft group comprises a fixed shaft, a fixed shaft bevel gear and a fixed shaft roller, the fixed shaft bevel gear and the fixed shaft roller are rotatably arranged on the fixed shaft, the driving shaft bevel gear and the fixed shaft bevel gear are both spiral bevel gears, the driving shaft bevel gear and the fixed shaft bevel gear are engaged, and the fixed shaft bevel gear is connected with the fixed shaft roller; The end of the fixed shaft away from the driving shaft is fixedly installed on the inner side of the rolling mill shell through bolts, and the other end is pressed against the inner side of the rolling mill shell in a slope structure.
2. The centralized drive three-sided rib cold rolled deformed steel bar box mill according to claim 1, characterized in that, The two driving shaft bevel gears on the two sides of the driving shaft roller are respectively left-handed bevel gears and right-handed bevel gears, the fixed shaft bevel gear engaged with the left-handed bevel gear is a right-handed bevel gear, and the fixed shaft bevel gear engaged with the right-handed bevel gear is a left-handed bevel gear.
3. The centralized drive three-sided rib cold rolled ribbed steel bar box mill as claimed in claim 1 wherein, The two ends of the fixed shaft are fixed to the rolling mill shell through fasteners.
4. The centralized drive three-sided rib cold rolled deformed steel bar box mill according to claim 1, characterized in that, The rolling mill shell comprises two shell bodies which are detachably connected.
5. The centralized drive three-sided rib cold rolled deformed steel bar box mill according to claim 1, characterized in that, The driving shaft is rotatably connected to the rolling mill shell, and the shaft head at one end of the driving shaft protrudes out of the rolling mill shell and is connected to a torque input shaft through a shaft coupling.
6. The centralized drive three-sided rib cold rolled deformed steel bar box mill according to claim 1, characterized in that, The outer ring of the fixed shaft is fixedly installed with a fixed shaft bearing, a tapered roller bearing is installed on the side close to the driving shaft, a bevel gear sleeve of the fixed shaft bevel gear is installed on the tapered roller bearing, a sleeve protruding from the bevel gear sleeve covers the fixed shaft bearing, and the fixed shaft roller is installed on the sleeve protruding from the bevel gear sleeve.
7. The centralized drive three-sided rib cold rolled ribbed steel bar box mill as claimed in claim 6 wherein, The bevel gear sleeve of the fixed shaft bevel gear is perpendicular to the center line of the fixed shaft and is fixedly installed on the tapered roller bearing, and the sleeve protruding from the bevel gear sleeve covers the fixed shaft bearing.
8. A centralized drive three-sided rib cold rolled ribbed steel bar production line characterized in that, The centralized transmission three-face rib cold-rolled ribbed steel bar box-type rolling mill comprises the centralized transmission three-face rib cold-rolled ribbed steel bar box-type rolling mill according to any one of claims 1 to 7.