CN214611294U

CN214611294U - Lifting swing arm roll changing device and roller coating unit

Info

Publication number: CN214611294U
Application number: CN202023120893.3U
Authority: CN
Inventors: 艾晶; 陈方元
Original assignee: Wisdri Engineering and Research Incorporation Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-11-05
Anticipated expiration: 2030-12-22

Abstract

The utility model relates to a lifting swing arm roll changing device, which comprises a roll changing frame, two swing arms, a lifting driving mechanism and a swing driving mechanism, wherein the swing arms are provided with bearing parts suitable for supporting roll shafts; the two swing arms can swing in a horizontal plane and are provided with swing arm working positions which swing to the outside of the roller changing rack and swing arm standby positions which are arranged in the roller changing rack; the two swing arms and the swing driving mechanism are driven to lift together by the lifting driving mechanism, or the two swing arms and the lifting driving mechanism are driven to swing together by the swing driving mechanism. In addition, the roll coater unit adopting the lifting swing arm roll changing device is also related. The utility model discloses a having the other above-mentioned lift swing arm roll change device of arranging of equipment of roll change demand, protecting the effect with the help of the support of swing arm, can supplementary completion roll change operation of convenient and fast ground, reduce the maintainer roll change operation degree of difficulty effectively, reduce maintainer's work load and shorten the activity duration.

Description

Lifting swing arm roll changing device and roller coating unit

Technical Field

The utility model belongs to the technical field of the metallurgical equipment, concretely relates to lift swing arm roll change device and dispose this lift swing arm roll change device's roller coat unit.

Background

In a production line in the field of metallurgy, rollers of equipment often need to be replaced, the rollers need to be replaced frequently with the help of a travelling crane during roller replacement, if the travelling crane is needed to hang an old roller to be replaced, a worker removes parts such as a bearing seat and the like, the travelling crane hangs the old roller away, or when the rollers are installed, the travelling crane hangs a new roller/a grinding roller away and descends to the roller installation height, and the rope of the hanging roller is released after the worker installs the parts such as the bearing seat and the like. The roll changing method is time-consuming and labor-consuming, and has the defects that the number of traveling cranes in a factory building is limited and the occupied time is irregular, so that the traveling cranes are frequently required to be waited when the rolls of equipment are changed, sometimes the rolls can be changed after waiting for several hours, the roll changing efficiency and the production rhythm are directly influenced, the operation of the traveling cranes needs to be matched up and down by workers, the running precision of lifting and the like is low, and the labor intensity of the workers and the operation danger are increased.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a lift swing arm roll changing device and dispose this lift swing arm roll changing device's roller coat unit can solve prior art's partial defect at least.

The utility model relates to a lifting swing arm roll changing device, which comprises a roll changing frame, two swing arms, a lifting driving mechanism and a swing driving mechanism, wherein the swing arms are provided with bearing parts suitable for supporting roll shafts;

the two swing arms and the swing driving mechanism are both arranged on a lifting platform, the lifting platform is connected with the output end of the lifting driving mechanism, and the two swing arms are respectively connected with the swing driving mechanism so as to swing in a horizontal plane and have a swing arm working position swinging to the outside of the roller changing rack and a swing arm standby position built in the roller changing rack;

or each swing arm is provided with a group of lifting driving mechanisms, the lifting driving mechanisms and the swing seats are arranged on the same swing seat, and the two swing seats are respectively connected with the swing driving mechanisms so as to swing in a horizontal plane and enable the swing arms to have a swing arm working position swinging to the outside of the roller changing frame and a swing arm standby position built in the roller changing frame.

As one embodiment, the swing driving mechanism comprises a swing driving motor and two sets of worm and gear assemblies, the swing driving motor is a double-shaft extension motor, two worms are respectively connected with two output shafts of the swing driving motor, two worm gears are respectively provided with a supporting shaft, and two swing arms are respectively mounted on the two supporting shafts.

As one embodiment, the swing driving mechanism includes a swing driving motor and two sets of bevel gear assemblies, the swing driving motor is a dual-shaft extension motor, each set of bevel gear assembly includes two bevel gears engaged with each other, one of the bevel gears is provided with a supporting shaft and the other bevel gear is provided with a transmission shaft, the two transmission shafts are respectively connected with two output shafts of the swing driving motor, and the two swing arms are respectively mounted on the two supporting shafts.

In one embodiment, the support portion is a V-shaped saddle.

In one embodiment, when both the swing arms and the swing driving mechanism are disposed on the lifting platform, a guide mechanism for guiding the lifting motion of the lifting platform is disposed on the roll changing machine frame.

As one embodiment, the lifting swing arm roll changing device further comprises a roll body storage table arranged beside the roll changing rack, wherein the roll body storage table is arranged between projections of two swing arm working positions on a workshop platform.

In one embodiment, the roller storage table has a traveling mechanism or a lifting portion adapted to be lifted by a traveling crane.

The utility model discloses still relate to a roll coater unit, including the roller coater, the roll change district of roller coater is arranged and is had as above lift swing arm roll changing device.

The utility model discloses following beneficial effect has at least:

the utility model discloses a having the other above-mentioned lift swing arm roll change device of arranging of equipment of roll change demand, protecting the effect with the help of the support of swing arm, can supplementary completion roll change operation of convenient and fast ground, reduce the maintainer roll change operation degree of difficulty effectively, reduce maintainer's work load and shorten the activity duration.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic side view of a roll changing device of a lifting swing arm according to an embodiment of the present invention;

fig. 2 is a schematic view of a front view structure of a lifting swing arm roll changing device provided by the embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a schematic structural view of a single roll coating machine according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;

fig. 6 is a cross-sectional view taken along line B-B of fig. 4.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

As shown in fig. 1-3, the embodiment of the present invention provides a lifting swing arm roll-changing device, which comprises a roll-changing frame 11, two swing arms 12, a lifting driving mechanism 14 and a swing driving mechanism, wherein the swing arms 12 are provided with a bearing part suitable for supporting a roll shaft. The lifting driving mechanism 14 is used for adjusting the position of the swing arm 12 in the vertical direction, the swinging driving mechanism is used for adjusting the position of the swing arm 12 in the horizontal plane, and the spatial position of the swing arm 12 can be accurately positioned through the matching of the lifting driving mechanism and the swinging driving mechanism.

In one embodiment, as shown in fig. 1 and fig. 2, both the two swing arms 12 and the swing driving mechanism are arranged on a lifting platform 13, the lifting platform 13 is connected with the output end of the lifting driving mechanism 14, and the two swing arms 12 are respectively connected with the swing driving mechanism so as to be capable of swinging in a horizontal plane and have a swing arm working position 12B swinging to the outside of the roll changing frame 11 and a swing arm standby position 12A built in the roll changing frame 11; the two swing arms 12 and the swing driving mechanism can be driven to lift together through the lifting platform 13. In a further embodiment, each swing arm 12 is provided with a set of lifting drive mechanisms 14 and both are arranged on the same swing seat, and the two swing seats are respectively connected with the swing drive mechanisms so as to be capable of swinging in a horizontal plane and enable the swing arm 12 to have a swing arm working position 12B swinging out of the roll changing frame 11 and a swing arm standby position 12A built in the roll changing frame 11; the two swing arms 12 and the lifting driving mechanism 14 can be driven to swing together through the swing base.

In this embodiment, the former way, that is, the way in which the two swing arms 12 and the swing driving mechanism are both disposed on the lifting table 13, is adopted, and the required movement space is relatively small. Further, as shown in fig. 1 to fig. 3, a guide mechanism 15 for guiding the lifting movement of the lifting table 13 is arranged on the roll changing frame 11, so that the movement stability of the lifting table 13 can be improved; the guide mechanism 15 may be a conventional slide-rail mating guide structure, a roller-rail mating guide structure, or the like, and will not be described in detail herein.

The lifting driving mechanism 14 may be a conventional lifting driving device, such as a cylinder, a hydraulic cylinder, an electric push rod, etc., or a motor + transmission structure, such as a motor-driven screw lifter or a winding drum, etc., which will not be described in detail herein. For the case where the elevating drive mechanism 14 drives the elevating table 13 to move, a plurality of sets of elevating drive devices may be provided to improve the stability of the movement of the elevating table 13.

The swing driving mechanism can adopt conventional rotary driving equipment; the two swing arms 12 can be driven to swing independently, that is, two independent swing driving mechanisms are adopted to drive the two swing arms 12 respectively, and one swing driving mechanism can be used to drive the two swing arms 12 to swing synchronously. In one embodiment, the swing driving mechanism includes a swing driving motor 161 and two sets of worm and gear assemblies, the swing driving motor 161 is a dual-shaft extension motor, two worms 162 are respectively connected with two output shafts of the swing driving motor 161, two worm gears 163 are respectively provided with a supporting shaft, and two swing arms 12 are respectively mounted on the two supporting shafts; in another embodiment, the swing driving mechanism includes a swing driving motor 161 and two sets of bevel gear assemblies, the swing driving motor 161 is a dual-shaft extension motor, each set of bevel gear assembly includes two bevel gears engaged with each other, one of the bevel gears is provided with a supporting shaft and the other bevel gear is provided with a transmission shaft, the two transmission shafts are respectively connected with two output shafts of the swing driving motor 161, and the two swing arms 12 are respectively mounted on the two supporting shafts. The two swing arms 12 are driven to swing through a set of swing driving mechanism, so that the equipment quantity can be saved, and the action cooperativity of the two swing arms 12 can be ensured; particularly, one of the swing arms 12 is driven to swing clockwise, and the other swing arm 12 swings anticlockwise, that is, the distance between the two swing arms 12 is the smallest when the swing arm stands 12A, and the distance between the two swing arms is gradually increased along with the swinging movement of the two swing arms, so that the opening degree between the two swing arms 12 is suitably and correspondingly adjusted according to factors such as the length of a roller, and the synchronous swinging of the two swing arms 12 is favorable for ensuring the accuracy of the opening degree adjustment.

The supporting part is preferably in a groove-shaped structure so as to stably and reliably support the roll shaft; in one embodiment, as shown in fig. 1 and 2, the support portion is a V-shaped saddle; of course, it is also possible to use an arc-shaped or rectangular slot with an upper opening. Further preferably, the saddle is rotatably disposed on the swing arm 12 and the rotation axis thereof is parallel to the vertical direction, a saddle rotation driving unit may be disposed on the swing arm 12, for example, the saddle is driven to rotate by a motor + transmission structure, the transmission structure may be a sprocket transmission structure, a gear transmission structure, a pulley transmission structure, etc., which is not described in detail herein, and further, an encoder may be configured for the motor of the saddle rotation driving unit; based on this structure, the swing angles of the two swing arms 12 (i.e., the opening degrees between the two swing arms 12) can be controlled to accommodate the replacement operation of the rollers of different lengths, while the saddle is rotated by the saddle rotation driving unit to ensure that the corresponding roller can be reliably held. Optionally, the roll changing device is designed to be a movable prying device structure (for example, the roll changing rack 11 is arranged on the roll changing trolley), so that one roll changing device can meet the roll changing requirements of a plurality of devices, the number of maintenance devices is effectively reduced, and the cost is reduced.

Further preferably, as shown in fig. 1 to fig. 3, the lifting swing arm roll changing device further includes a roll storing table 17 disposed beside the roll changing frame 11, the roll storing table 17 is disposed between the projections of the two swing arm work positions 12B on the workshop platform, that is, the length of the roll storing table 17 is smaller than the distance between the two swing arm work positions 12B, for example, the length of the roll storing table 17 is substantially the same as the length of the roll body of the roll, and when the roll is placed on the roll storing table 17, the roll shafts at the two ends of the roll can extend out of the roll storing table 17 and can contact with the swing arms 12. The roller body storage table 17 is also provided with a storage portion which can be in the form of a V-shaped saddle or the like. The roller body storage table 17 can be fixedly mounted on a workshop platform; in a preferred embodiment, the roller storage table 17 has a traveling mechanism or a lifting part adapted to be lifted by a traveling crane, so as to facilitate the roller changing operation.

The specific implementation steps of the roll changing operation by using the roll changing device comprise:

(1) when the roller is dismounted, after the two swing arms 12 swing at a proper height position to reach a preset opening degree, the swing arms 12 are lifted to a target position, so that the two swing arms 12 support the roller shaft;

after the bearing seats of the rollers and other parts are dismantled, the two swing arms 12 can be lowered, and the dismantled rollers are placed on the roller body storage table 17;

the two swing arms 12 are further swung to avoid the roll shafts, or the roll body storage table 17 is moved to enable the roll shafts to leave the area right above the swing arms 12, so that the interference between the roll shafts and the lifting movement of the swing arms 12 can be avoided; then, the swing arm 12 is lifted to a proper height position, and the swing arm 12 returns to the swing arm standby position 12A; when the vehicle in the workshop is convenient to drive, the roller body storage table 17 or the rollers on the roller body storage table 17 are lifted.

(2) When the roller is installed, the operation is reversed in the above manner, and the description is omitted here.

As can be seen from the process of removing and installing the rollers, maintenance personnel do not need to waste time for waiting for the traveling crane, and the roller changing efficiency is improved. Meanwhile, under a special condition, the two swing arms 12 can contact and support the roller only by avoiding other equipment or parts, and at the moment, the roller can be avoided conveniently and flexibly only by increasing or reducing the opening degree between the two swing arms 12, so that the adaptability of the roller changing device to equipment and environment is improved.

Example two

An embodiment of the utility model provides a roll coater unit, including the roller coater, the roll change district of roller coater has arranged the lift swing arm roll change device that above-mentioned embodiment provided.

EXAMPLE III

The embodiment of the utility model provides a single roll coating machine can be used to among the above-mentioned second embodiment as the roll coater.

4-5, the single-roller coating machine comprises a coating machine frame 21, an upper coating roller 222 and a lower coating roller 232, and further comprises an upper roller frame 221, an upper lifting mechanism 223 arranged at the top of the coating machine frame 21 and used for driving the upper roller frame 221 to lift, a lower roller frame 231 and a lower lifting mechanism 233 arranged at the bottom of the coating machine frame 21 and used for driving the lower roller frame 231 to lift; the bearing seat of the upper coating roller 222 is arranged on the upper roller frame 221 in a sliding mode, and the sliding direction of the bearing seat is parallel to the axial direction of the upper coating roller body 2221; the bearing seat of the lower coating roller 232 is arranged on the lower roller frame 231 in a sliding mode, and the sliding direction of the bearing seat is parallel to the axial direction of the lower coating roller body 2321; the transmission side frame body 211 and/or the operation side frame body 212 of the coating machine frame 21 are/is provided with a roller changing channel for the upper coating roller 222 and the lower coating roller 232 to pass through.

The coater stand 21 is fixedly mounted on the workshop platform and has a door-shaped or rectangular cross section perpendicular to the running direction of the strip, as will be understood: when the coating machine frame 21 is not provided with a bottom plate, the coating machine frame is door-shaped, and the frame bodies (the transmission side frame body 211 and the operation side frame body 212) at two sides of the coating machine frame 21 are directly arranged on a workshop platform; when the coater rack 21 is provided with a base plate, which is rectangular, the base plate is mounted on a workshop platform, and the transmission side frame body 211 and the operation side frame body 212 of the coater rack 21 are supported on the base plate. The strip passes between the drive-side frame body 211 and the operating-side frame body 212 of the coater frame 21. The transmission side frame body 211 and the operation side frame body 212 are connected through the top plate, so that the structural strength and the working stability of the coating machine frame 21 can be ensured.

In one embodiment, as shown in fig. 4, the transmission side frame body 211 and the operation side frame body 212 are both door-shaped frames, and it can be understood that the door-shaped frames are perpendicular to the axial direction of the upper coating roller body 2221/the axial direction of the lower coating roller body 2321, and the spatial regions defined by the door-shaped frames can be used as the inlets and the outlets of the upper coating roller 222 and the lower coating roller 232, so as to form the roller change channel; when the rolls are changed, the old/new rolls pass through the door of the operation-side frame body 212, that is, between the two door posts of the operation-side frame body 212. The portal frame can ensure the structural strength of the frame body, simultaneously ensure enough space required by operations such as roll changing and the like, facilitate the roll changing operation, and the upper coating roll 222 and the lower coating roll 232 can smoothly pass through the portal frame. The transmission side frame body 211 also adopts a door-shaped frame, so that more maintenance space is provided for the coating machine, for example, more movable spare space is provided for an old roller/a new roller during roller changing, on the other hand, the production process and the equipment condition can be observed more visually by workers, and the connection between the transmission side equipment and the component equipment in the coating machine, for example, the connection between the upper lifting mechanism 223, the lower lifting mechanism 233, the coating liquid spray nozzle 24 and the like and external equipment is facilitated.

The upper lifting mechanism 223 and the lower lifting mechanism 233 may be conventional lifting driving devices, such as a hydraulic cylinder, an air cylinder, a screw lifter, a winch, and the like, and the specific structure thereof is not described herein. Preferably, as shown in fig. 4 and 5, the driving side frame body 211 and the operating side frame body 212 are each provided with an upper guide unit 251 for guiding the up-and-down movement of the upper roller frame 221; and/or, the transmission-side frame body 211 and the operation-side frame body 212 are provided with lower guide units 252 for guiding the lifting movement of the lower roller frame 231. By providing the guide unit, the stability and reliability of the elevating movement of the upper and lower roll frames 221 and 231 can be improved, thereby improving the coating quality. The upper guide unit 251 and the lower guide unit 252 may be of a conventional slider-rail coupling type guide structure, or may be of a roller-groove rail coupling type guide structure.

As for the above-mentioned structure in which the transmission-side frame body 211 and the operation-side frame body 212 are both door-shaped frames, as shown in fig. 4, it is preferable that the sliding rails/grooved rails of the upper guide unit 251 and the lower guide unit 252 are disposed at the inner edges of the door posts, that is, two door posts of the transmission-side frame body 211 are respectively provided with one set of rails, two door posts of the operation-side frame body 212 are respectively provided with one set of rails, and two sets of rails of each side frame body are disposed oppositely; taking a slide block-slide rail matched type guide structure as an example, the sliding surface of the slide block is parallel to the vertical direction and is perpendicular to the axial direction of the coating roller body 2221; taking the roller-grooved rail-fitted guide structure as an example, the axial direction of the roller is parallel to the axial direction of the applicator roller body 2221. Based on the structure, the equipment layout of the coating machine can be compact, the volume and the occupied space of the frame 21 of the coating machine can be obviously reduced, and the lifting motion of the upper roller frame 221 and the lower roller frame 231 is more stable based on the limitation of door-shaped frames at two sides, thereby effectively improving the coating quality of strip steel and prolonging the service life of the coating machine

In connection with the structure of the single-roll coating machine, as shown in fig. 4-6, the upper roll stand 221 is provided with a first horizontal guiding unit for guiding the sliding motion of the upper coating roll 222; and/or a second horizontal guiding unit for guiding the sliding motion of the lower coating roller 232 is arranged on the lower roller frame 231. Similarly, the first horizontal guide unit and the second horizontal guide unit can adopt a conventional slide block-slide rail matching type guide structure, and can also adopt a roller-groove rail matching type guide structure. By arranging the horizontal guide unit, the stability of the translational motion of the upper coating roller 222 and the lower coating roller 232 can be improved, the roller changing operation is facilitated, and the installation accuracy of the upper coating roller 222 and the lower coating roller 232 is ensured. Alternatively, a guide beam 26 is provided on the upper roller frame 221, and a slide rail/grooved rail or the like may be formed on the guide beam 26; the guide beam 26 preferably extends beyond the operating side frame body 212 to facilitate the roll change operation; the guide cross member 26 may be provided on the lower roll stand 231.

In connection with the structure of the single-roll coating machine, the upper roll frame 221 and the lower roll frame 231 are respectively provided with a coating roll locking mechanism for limiting the sliding of the corresponding coating roll, the coating roll locking mechanism is used for locking the coating roll on the corresponding roll frame so as to ensure that the coating roll can reliably work in the normal production process, and meanwhile, the coating roll locking mechanism also needs to release the locking state so as to facilitate the roll changing operation. In one embodiment, the coating roller locking mechanism comprises a locking clamping plate 28 hinged on the corresponding roller frame, a limiting groove matched with the locking clamping plate 28 is arranged at the shaft end of the corresponding coating roller shaft or the corresponding coating roller bearing seat, the coating roller can be locked on the corresponding roller frame by clamping the locking clamping plate 28 into the limiting groove, and the operation such as roller replacement can be carried out after the locking clamping plate 28 leaves the limiting groove.

In an alternative embodiment, as shown in fig. 4, a pressure detection unit 224 is installed between the output end of the upper lifting mechanism 223 and the upper roller frame 221, and the pressure detection unit 224 may adopt a pressure sensor or the like; by the feedback of the pressure detecting unit 224, the force of mutual pressing between the upper coating roller body 2221 and the lower coating roller body 2321 can be controlled to obtain a coating quality meeting the requirements.

In an alternative embodiment, a buffer unit 234 is interposed between the output end of the lower lifting mechanism 233 and the lower roller frame 231; preferably, as shown in fig. 4 and 5, the damping unit 234 includes a plurality of damping springs, and an axial direction of each of the damping springs is parallel to a vertical direction. Based on the design, the lower coating roller 232 and the strip steel are kept at relatively stable contact pressure, flexible liquid coating on the strip steel can be realized, the uniformity of the thickness of the coating of the strip steel is improved, and meanwhile, the buffer unit 234 can better absorb vibration transmitted by the lower coating roller 232, so that the strip steel and the coating rollers and the like are prevented from being damaged due to the fact that the acting force between the strip steel and the lower coating roller 232 is increased suddenly due to factors such as the shape of the strip steel.

In an alternative embodiment, the pressure detection unit 224 and the buffer unit 234 may be interchanged.

In connection with the structure of the single-roll coating machine, as shown in fig. 4-6, a coating liquid collecting tank 271 is arranged below the lower roll frame 231, the coating liquid collecting tank 271 is provided with a translation guide rail 272, and the guide direction of the translation guide rail 272 is parallel to the running direction of the strip steel and extends out of the coating machine frame 21. The coating liquid collecting groove 271 is used for collecting coating liquid dripping in the normal production process, and the coating liquid collecting groove 271 can be moved out of the range of the coating machine frame 21 through the translation guide rail 272, so that the coating liquid collecting groove 271 is convenient to clean.

Obviously, the lifting swing arm roll changing device is arranged on the operating side of the single-roll coating machine, and can assist in completing the roll changing operation of the upper coating roll 222 and the lower coating roll 232.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lift swing arm roll-changing device which characterized in that: the roll changing machine comprises a roll changing rack, two swing arms, a lifting driving mechanism and a swinging and rotating driving mechanism, wherein the swing arms are provided with bearing parts suitable for bearing roll shafts;

2. The lifting swing arm roll changing device of claim 1, wherein: the swing driving mechanism comprises a swing driving motor and two sets of worm and gear assemblies, the swing driving motor is a double-shaft extension motor, two worms are respectively connected with two output shafts of the swing driving motor, supporting shafts are respectively arranged on two worm gears, and two swing arms are respectively arranged on the two supporting shafts.

3. The lifting swing arm roll changing device of claim 1, wherein: the swing driving mechanism comprises a swing driving motor and two bevel gear assemblies, the swing driving motor is a double-shaft extension motor, each bevel gear assembly comprises two bevel gears which are meshed with each other, a supporting shaft is arranged on one bevel gear, a transmission shaft is arranged on the other bevel gear, the two transmission shafts are respectively connected with two output shafts of the swing driving motor, and the two swing arms are respectively arranged on the two supporting shafts.

4. The lifting swing arm roll changing device of claim 1, wherein: the bearing part is a V-shaped saddle.

5. The lifting swing arm roll changing device of claim 1, wherein: when the two swing arms and the swing driving mechanism are uniformly arranged on the lifting platform, a guide mechanism for guiding the lifting motion of the lifting platform is arranged on the roller changing rack.

6. The lifting swing arm roll changing device of claim 1, wherein: the roll body storage table is arranged beside the roll changing rack and between projections of the two swing arm working positions on the workshop platform.

7. The lifting swing arm roll changing device of claim 6, wherein: the roller body storage platform is provided with a traveling mechanism or a lifting part suitable for being lifted by a travelling crane.

8. The utility model provides a roll coating unit, includes the roll coater, its characterized in that: the roll changing area of the roll coater is provided with the lifting swing arm roll changing device as claimed in any one of claims 1 to 7.