CN220862351U - Flat head of rolling mill working roll and flat head sleeve mounting structure of transmission shaft - Google Patents
Flat head of rolling mill working roll and flat head sleeve mounting structure of transmission shaft Download PDFInfo
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- CN220862351U CN220862351U CN202322299113.3U CN202322299113U CN220862351U CN 220862351 U CN220862351 U CN 220862351U CN 202322299113 U CN202322299113 U CN 202322299113U CN 220862351 U CN220862351 U CN 220862351U
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- flat head
- sleeve
- inner sleeve
- outer sleeve
- rolling mill
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- 238000005096 rolling process Methods 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims 4
- 238000003780 insertion Methods 0.000 claims 4
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 6
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
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Abstract
The utility model discloses a mounting structure of a flat head of a working roll of a rolling mill and a flat head sleeve of a transmission shaft, which comprises a flat head sleeve, a mandrel thrust plate, an inner sleeve, an outer sleeve, a ball ring, a positioning piece and a flat head, wherein the end part of the flat head is provided with an assembly groove, the mandrel thrust plate comprises a stop part and a shaft part, the inner sleeve is axially sleeved outside the shaft part, the outer sleeve is embedded in the assembly groove, the ball ring is axially arranged between the shaft part and the inner sleeve and between the outer sleeve and the flat head, and the positioning piece is axially inserted into the inner sleeve and the outer sleeve and used for limiting radial movement of the ball ring. According to the mounting structure of the flat head of the working roller and the flat head sleeve of the transmission shaft, the ball rings are axially arranged between the shaft part and the inner sleeve and between the outer sleeve and the flat head, so that the inner sleeve and the outer sleeve are axially positioned, the axial movement is prevented, the radial displacement of the ball rings is limited by the positioning piece, the inner sleeve and the outer sleeve are prevented from being separated, and the centering effect of the working roller is prolonged more effectively and is more stable.
Description
Technical Field
The utility model relates to the field of assembly of working rolls of rolling mills, in particular to a mounting structure of a flat head of a working roll of a rolling mill and a flat head sleeve of a transmission shaft.
Background
The flat head of the working roller of the CSP rolling mill is inserted into the flat head sleeve of the transmission shaft of the working roller and needs to be accurately positioned through the centering sleeve. Because the service cycle of the transmission shaft is longer, the frequency is high, the abrasion of the centering sleeve is relatively obvious, the original interference fit between the positioning sleeve and the flat head sleeve is changed into clearance fit under the action of long-term alternating load to cause loosening, the centering sleeve is pulled out and taken away even along with the working roller when the working roller is replaced, and the motion of the working roller is deviated due to the fact that the centering sleeve is not found to be lost when a new roller is inserted, so that the rolling precision of a steel plate is out of tolerance, and the quality of a product is caused. Naturally, there are also cases where the work roll centering sleeve is left on the transmission shaft, and at this time, problems such as the work roll pushing-out (separating from the lower roll fixing position) and the work roll not being pushed in place are caused, so that the specified roll changing time is affected, the production rhythm is disturbed, the product quality is affected, and even the production is interrupted.
In view of this, it is necessary to provide a rolling mill work roll flat head and drive shaft flat head sleeve mounting structure that addresses the above-described drawbacks.
Disclosure of utility model
The utility model mainly aims to provide a mounting structure of a flat head of a working roll of a rolling mill and a flat head sleeve of a transmission shaft, and aims to solve the problem that the existing positioning sleeve and the existing eccentric sleeve are easy to loose due to abrasion.
In order to achieve the above purpose, the utility model provides a mounting structure of a flat head of a working roll of a rolling mill and a flat head sleeve of a transmission shaft, which comprises a flat head sleeve, a mandrel thrust plate, an inner sleeve, an outer sleeve, a ball ring, a positioning piece and a flat head with an assembly groove at the end part, wherein the mandrel thrust plate comprises a stop part and a shaft part, the inner sleeve is axially sleeved outside the shaft part, the outer sleeve is embedded in the assembly groove, the ball ring is axially arranged between the shaft part and the inner sleeve and axially arranged between the outer sleeve and the flat head, the positioning piece is axially inserted into the inner sleeve and the outer sleeve from the end parts of the inner sleeve and the outer sleeve respectively for limiting radial movement of the ball ring, the flat head is inserted into the flat head sleeve, the stop part is stopped at the end part of the flat head, and the outer sleeve is synchronously and axially sleeved outside the inner sleeve.
Preferably, the ball ring is composed of a plurality of balls, two positioning pieces are arranged on the periphery of the shaft part, the periphery of the inner sleeve, the periphery of the outer sleeve and the groove wall of the assembly groove, grooves on the shaft part and grooves on the inner sleeve are assembled to form a first installation ring groove, grooves on the outer sleeve and grooves on the flat head are assembled to form a second installation ring groove, ball inlet holes penetrating through the inner surface and the outer surface of the inner sleeve and the outer sleeve are radially formed in the inner sleeve and the outer sleeve, the balls enter the first installation ring groove and the second installation ring groove from the ball inlet holes, one positioning piece axially penetrates into the inner sleeve from the end part of the inner sleeve and axially extends to the ball inlet holes to stop the balls in the first installation ring groove, and the other positioning piece axially penetrates into the outer sleeve from the end part of the outer sleeve and axially extends to the ball inlet holes to stop the balls in the second installation ring groove.
Preferably, an interference fit is provided between the outer sleeve and the inner sleeve.
Preferably, the positioning member is a screw.
Preferably, the grooves are arc grooves.
Preferably, the cross sections of the first mounting ring groove and the second mounting ring groove are matched with the shape of the ball, and are round.
Preferably, the mounting directions of the two positioning members are opposite.
Preferably, the balls are steel balls.
Preferably, the outer periphery of the stop part has a step structure.
Compared with the prior art, the installation structure of the flat head of the working roller of the rolling mill and the flat head sleeve of the transmission shaft has the following beneficial effects:
According to the mounting structure of the flat head of the rolling mill working roll and the flat head sleeve of the transmission shaft, the ball rings are axially arranged between the shaft part and the inner sleeve and between the outer sleeve and the flat head, so that the inner sleeve and the outer sleeve are axially positioned, the inner sleeve and the outer sleeve are prevented from axially moving, the radial displacement of the ball rings is limited by the positioning piece, the inner sleeve and the outer sleeve can be effectively prevented from being separated, the centering effect of the working roll is prolonged more effectively and is more stable, and effective guarantee is provided for stabilizing the product quality.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a structure for mounting a flat head of a working roll and a flat head sleeve of a transmission shaft of a rolling mill;
FIG. 2 is a cross-sectional view of the mill work roll flat head and drive shaft flat head sleeve mounting structure shown in FIG. 1;
FIG. 3 is an enlarged view of portion A of the mill work roll flat head and drive shaft flat head cover mounting structure shown in FIG. 1;
Fig. 4 is an enlarged view of a portion B of the mill work roll flat head and drive shaft flat head sleeve mounting structure shown in fig. 1.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Referring to fig. 1 to 4, the utility model provides a mounting structure for a flat head of a working roll and a flat head sleeve of a transmission shaft of a rolling mill. The flat head and transmission shaft flat head sleeve mounting structure of the rolling mill comprises a flat head sleeve 1, a mandrel thrust plate 3, an inner sleeve 5, an outer sleeve 7, a ball ring 8, a positioning piece 9 and a flat head 11 with an assembly groove 10 formed in the end portion, wherein the mandrel thrust plate 3 comprises a stop part 31 and a shaft part 33, the flat head 11 is inserted into the flat head sleeve 1, the outer sleeve 7 is embedded into the assembly groove 10, the ball ring 8 is sleeved between the shaft part 33 and the inner sleeve 5 and between the outer sleeve 7 and the flat head 11, the positioning piece 9 is axially inserted into the inner sleeve 5 and the outer sleeve 7 from the end portions of the inner sleeve 5 and the outer sleeve 7 respectively and used for limiting radial movement of the ball ring 8, the inner sleeve 5 is axially sleeved outside the shaft part 33, the stop part 31 is stopped at the end portion of the flat head 11, and the outer sleeve is synchronously and axially sleeved outside the inner sleeve. The ball rings 8 are respectively sleeved between the shaft part 33 and the inner sleeve 5 and between the outer sleeve 7 and the flat head 11 through axial arrangement, so that the inner sleeve 5 and the outer sleeve 7 are axially positioned, the inner sleeve 5 and the outer sleeve 7 are prevented from moving axially, radial displacement of the ball rings 8 is limited through the positioning piece 9, the inner sleeve 5 and the outer sleeve 7 can be effectively prevented from being separated, the work of the working roll is more stable, and effective guarantee is provided for stabilizing the product quality.
Specifically, the ball ring 8 is composed of a plurality of balls, the number of the positioning members 9 is two, grooves are formed on the outer circumference of the shaft portion 33, the inner circumference of the inner sleeve 5, the outer circumference of the outer sleeve 7 and the groove wall of the assembly groove 10, the grooves on the shaft portion 33 and the grooves on the inner sleeve 5 are assembled to form a first installation groove 13, the grooves on the outer sleeve 7 and the grooves on the flat head 11 are assembled to form a second installation groove 15, the inner sleeve 5 and the outer sleeve 7 are radially provided with ball inlet holes 19 penetrating through the inner surface and the outer surface of the inner sleeve 5 and the outer surface of the outer sleeve 7, the balls enter the first installation groove 13 and the second installation groove 15 from the ball inlet holes 19, one positioning member 9 axially penetrates the inner sleeve 5 from the end of the inner sleeve 5 and axially extends to the ball inlet holes 19 to stop the balls in the first installation groove 13, and the other positioning member 9 axially penetrates the outer sleeve 7 from the end of the outer sleeve 7 and axially extends to the second ball inlet holes 19 to stop the balls in the second installation groove 15. One part of the balls is limited in the groove of the shaft part 33, and the other part of the balls is limited in the groove of the inner sleeve 5, so that the shaft part 33 and the inner sleeve 5 are axially positioned, and the inner sleeve 5 is prevented from axially moving. Similarly, a part of the balls are limited in the outer sleeve 7, and the other part of the balls are limited in the assembly groove 10 of the flat head 11, so that the outer sleeve 7 and the flat head 11 are axially positioned, and the outer sleeve 7 is prevented from axially moving, therefore, the inner sleeve 5 and the outer sleeve 7 can be respectively and effectively axially positioned through the arranged ball rings 8, and the inner sleeve and the outer sleeve are prevented from axially moving to be separated.
Further, the outer sleeve 7 and the inner sleeve 5 are in clearance fit. The outer sleeve 7 is fixed in the assembly groove 10 of the flat head 11 through the ball ring 8, and the inner sleeve 5 is axially assembled together after being fixed on the shaft part 33 of the mandrel thrust plate 3 through the ball ring 8.
Specifically, in this embodiment, the positioning member 9 is a screw. Preferably a screw with a polished rod at one end and threaded at one end. Of course, in other embodiments, the positioning member 9 may be a pin or the like.
Specifically, in this embodiment, the groove is an arc groove. Is matched to the local outer surface profile of the ball so that the ball can be embedded in the groove.
The cross sections of the first installation ring groove 13 and the second installation ring groove 15 are matched with the shape of the ball, and are round. The balls are respectively embedded in the first mounting ring groove 13 and the second mounting ring groove 15.
Wherein the mounting directions of the two positioning pieces 9 are opposite. According to the stress condition, one positioning piece 9 is axially inserted from the end of the inner sleeve 5, and the other positioning piece 9 is axially inserted from the end of the outer sleeve 7.
Specifically, the ball is a steel ball, and the steel ball is wear-resistant and long in service life.
The outer periphery of the stop portion 31 has a step structure and abuts against the flat head sleeve 1 to improve the matching degree of the two. Further, one side of the stopper 31 abuts against an end of the flat head 11.
After the inner sleeve 5 is installed in place, the steel balls are placed in the ball-entering holes 19 of the inner sleeve 5, the steel balls reach the first mounting ring grooves 13 formed by the shaft parts 33 of the mandrel thrust plate 3 and the inner sleeve 5, the purpose of axial positioning is achieved, and then the positioning pieces 9 are axially arranged on the inner sleeve 5 to block the steel ball outlets. After the inner sleeve 5 is assembled in place, a steel ball is placed in the ball inlet hole 19 of the outer sleeve 7 to the second mounting ring groove 15, and the outer sleeve 7 is axially screwed into the positioning piece 9 to block the outlet of the steel ball, so that the aim of axial positioning is fulfilled. When the original interference fit between the inner sleeve 5 and the shaft 33 and between the outer sleeve 7 and the flat head 11 is loosened after a period of use, the inner sleeve 5 or the outer sleeve 7 needs to be replaced in time, the positioning piece 9 is firstly taken out, the ball inlet hole 19 is vertically below, and the steel balls fall out under the action of gravity, so that the outer sleeve 7 and the inner sleeve 5 can be easily taken out.
The installation steps of the installation structure of the flat head 11 and the flat head sleeve 1 of the working roller of the rolling mill are as follows: the inner sleeve 5 is assembled by adopting a thermal expansion method, the inner sleeve 5 is heated to a preset temperature, sleeved at the installation position of the shaft part 33 of the thrust plate, naturally cooled to room temperature, then placed into the steel ball to the first installation ring groove 13, and screwed into the positioning piece 9. The outer sleeve 7 is installed by adopting a freezing method, is inserted into the assembly groove 10 of the flat head 11 to a proper position, and is put into the steel ball from the ball inlet hole 19 of the outer sleeve 7 to the second installation ring groove 15 after the temperature is raised to the room temperature, and the positioning piece 9 is installed in the end face hole of the outer sleeve 7 to prevent the steel ball from falling out to fail, so that the assembly is completed.
According to the mounting structure of the flat head of the rolling mill working roll and the flat head sleeve of the transmission shaft, the ball rings are axially arranged between the shaft part and the inner sleeve and between the outer sleeve and the flat head, so that the inner sleeve and the outer sleeve are axially positioned, the inner sleeve and the outer sleeve are prevented from axially moving, the radial displacement of the ball rings is limited by the positioning piece, the inner sleeve and the outer sleeve can be effectively prevented from being separated, the centering effect of the working roll is prolonged more effectively and is stable, and effective guarantee is provided for stabilizing the product quality.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. The utility model provides a rolling mill work roll flat head and transmission shaft flat head cover mounting structure, its characterized in that includes flat head cover, dabber thrust plate, endotheca, overcoat, ball ring, locating part and tip offer the flat head of assembly groove, dabber thrust plate includes backstop portion and shaft part, the endotheca axial jacket is located outside the shaft part, the overcoat inlays and establishes in the assembly inslot, the ball ring axial install in between shaft part and the endotheca and axial install in between overcoat and the flat head, the locating part is inserted respectively from the tip axial of endotheca with the overcoat is used for spacing in endotheca and the overcoat the radial removal of ball ring, the flat head inserts in the flat head cover, backstop portion in the tip of flat head, the overcoat synchronous axial suit is in outside the endotheca.
2. The rolling mill work roll flat head and transmission shaft flat head sleeve mounting structure according to claim 1, wherein the ball ring is composed of a plurality of balls, two positioning members are arranged, grooves are formed in the periphery of the shaft portion, the inner periphery of the inner sleeve, the outer periphery of the outer sleeve and the groove wall of the mounting groove, a first mounting groove is formed by assembling the grooves on the shaft portion and the grooves on the inner sleeve, a second mounting groove is formed by assembling the grooves on the outer sleeve and the grooves on the flat head, ball insertion holes penetrating through the inner surface and the outer surface of the inner sleeve and the outer sleeve are formed in the inner sleeve and the outer sleeve in a radial mode, the balls enter the first mounting groove and the second mounting groove from the ball insertion holes, one positioning member axially penetrates into the inner sleeve from the end portion of the inner sleeve and axially extends to the ball insertion holes to stop the balls in the first mounting groove, and the other positioning member axially penetrates into the outer sleeve from the end portion of the outer sleeve and axially extends to the ball insertion holes to stop the balls in the second mounting groove.
3. The rolling mill work roll flat head and drive shaft flat head cover mounting structure according to claim 1, wherein said outer sleeve and said inner sleeve are in interference fit.
4. The rolling mill work roll flat head and drive shaft flat head cover mounting structure according to claim 2, wherein the positioning member is a screw.
5. The rolling mill work roll flat head and drive shaft flat head cover mounting structure according to claim 2, wherein the groove is an arc-shaped groove.
6. The rolling mill work roll flat head and drive shaft flat head cover mounting structure according to claim 2, wherein the first mounting ring groove and the second mounting ring groove are adapted in cross section to the shape of the balls and are circular.
7. The structure for mounting a flat head of a work roll and a flat head cover of a transmission shaft of a rolling mill according to claim 2, wherein the mounting directions of the two positioning members are opposite.
8. The rolling mill work roll flat head and drive shaft flat head cover mounting structure according to claim 2, wherein the balls are steel balls.
9. The structure for mounting a flat head of a work roll and a flat head cover of a transmission shaft of a rolling mill according to claim 2, wherein the outer periphery of the stopper portion has a stepped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322299113.3U CN220862351U (en) | 2023-08-25 | 2023-08-25 | Flat head of rolling mill working roll and flat head sleeve mounting structure of transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322299113.3U CN220862351U (en) | 2023-08-25 | 2023-08-25 | Flat head of rolling mill working roll and flat head sleeve mounting structure of transmission shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220862351U true CN220862351U (en) | 2024-04-30 |
Family
ID=90815647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322299113.3U Active CN220862351U (en) | 2023-08-25 | 2023-08-25 | Flat head of rolling mill working roll and flat head sleeve mounting structure of transmission shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220862351U (en) |
-
2023
- 2023-08-25 CN CN202322299113.3U patent/CN220862351U/en active Active
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