CN115889068A - Lifting device and roller coating equipment - Google Patents

Abstract

The invention relates to a lifting device and roller coating equipment. The lifting device comprises a mounting frame, a driving mechanism, a tensioning mechanism, a braking mechanism and a limiting mechanism. The tensioning mechanism comprises a tensioning seat, a roller assembly and a floating assembly located between the roller assembly and the tensioning seat, the tensioning seat is installed on a transmission belt on one side, and the roller assembly is abutted to the transmission belt on the other side. The limiting mechanism is arranged on the roller component, limits the braking mechanism when the transmission belt normally runs, and is broken when the transmission belt is broken; the driving of the roller component moves towards the transmission belt on the other side to release the braking mechanism, so that the braking mechanism is in contact with the mounting frame for braking. When the transmission of the transmission belt is abnormal, the tension force of the transmission belt is not enough to press down the roller wheel assembly, so that the limiting mechanism can move in the direction away from the tension seat under the action of the floating assembly to release the braking mechanism, the braking mechanism is in contact with the mounting frame, the load mounted on the transmission belt is prevented from falling, and the use safety is ensured.

Description

Lifting device and roller coating equipment

Technical Field

The invention relates to the technical field of braking, in particular to a lifting device and roller coating equipment.

Background

In the indoor roller coating equipment, the lifting device drives the roller coating executing device to do lifting motion, so that roller coating is realized. The belt lifter has the characteristics of simple structure, low cost, easy maintenance and the like, is used as a lifting device of roller coating equipment, and converts rotary motion into linear lifting motion through the motor driving belt wheel and the belt module. However, the belt lifter has the defect that the belt is easy to age or break, so that the lifting load suddenly drops, and great potential safety hazard is caused.

Disclosure of Invention

Therefore, a lifting device and a roller coating device are needed to be provided, the load can be prevented from falling, and the use safety can be guaranteed.

A lifting device, comprising:

a mounting frame;

the driving mechanism comprises a driving wheel, a driven wheel and a transmission belt, the driving wheel and the driven wheel are respectively arranged at two ends of the mounting frame in the height direction, and the transmission belt surrounds the driving wheel and the driven wheel;

the tensioning mechanism comprises a tensioning seat, a roller assembly and a floating assembly positioned between the roller assembly and the tensioning seat, the tensioning seat is installed on the transmission belt on one side, and the roller assembly abuts against the transmission belt on the other side;

the brake mechanism is arranged on the tensioning seat; and

and the limiting mechanism is arranged on the roller component and limits the braking mechanism when the driving belt normally runs, and the limiting mechanism is driven by the roller component to move towards the driving belt on the other side when the driving belt is broken so as to release the braking mechanism and enable the braking mechanism to be in contact with the mounting rack for braking.

When the lifting device is used, the tensioning seat is arranged on one transmission belt, and the roller component is abutted to the transmission belt on the other side. When the transmission belt is in normal transmission, namely the transmission belt has qualified tension, the transmission belt compresses the roller assembly to enable the roller assembly to move along the direction close to the tension seat, and then the limiting mechanism is driven to move along the direction close to the braking mechanism until the limiting mechanism is in limiting fit with the braking mechanism, so that the braking mechanism is not in contact with the mounting frame, and at the moment, the lifting device can normally operate. When the transmission belt has transmission abnormality, such as transmission belt aging, transmission belt fracture and the like, the roller components are pressed down due to insufficient tension of the transmission belt, so that the limiting mechanism can move in the direction away from the braking mechanism under the action of the floating components to release the braking mechanism, and the braking mechanism is contacted with the mounting frame to prevent the load mounted on the transmission belt from falling. So, under straining device, arrestment mechanism and stop gear's cooperation, can prevent that the load from falling, guarantee safety in utilization.

In one of them embodiment, arrestment mechanism includes mounting panel, braking elastic component and braking axle, the mounting panel is vertical to be located straining device's at least one side, the mounting panel be equipped with at least one with the shaft hole of braking axle adaptation, the braking axle transversely and movably wear to locate in the shaft hole, braking elastic component transversely locates the tensioning seat with between the mounting panel, braking elastic component along horizontal both ends connect respectively in the braking axle with the tensioning seat. When the limiting mechanism is in limiting fit with the brake shaft, the brake shaft retracts; when the limiting mechanism releases the brake shaft, the brake shaft extends out under the action of the brake elastic piece.

In one embodiment, the braking shaft is provided with a shaft shoulder, the limiting mechanism comprises a limiting plate extending from the roller assembly in a direction close to the shaft shoulder, and the limiting plate is provided with a limiting part for limiting and matching with the shaft shoulder.

In one embodiment, the mounting rack comprises a rack body and at least one guide rail, the at least one guide rail is arranged along the height direction of the rack body, and at least one insertion hole matched with the brake shaft is formed in the at least one guide rail; the brake shaft is arranged towards the guide rail, and the brake shaft can be inserted into the insertion hole when the limiting mechanism is released.

In one embodiment, the braking mechanism is fixed with a sliding block, and the braking mechanism can move along the height direction of the frame body under the matching of the guide rail and the sliding block.

In one embodiment, the floating assembly comprises a floating elastic piece arranged along a first direction, one end of the floating elastic piece abuts against the tensioning seat, and the other end of the floating elastic piece abuts against the bottom of the roller assembly; wherein the first direction is a direction perpendicular to the belt.

In one embodiment, the floating assembly further comprises a guide shaft arranged along the first direction, and the guide shaft is fixed on the tensioning seat; the bottom of wheel components is equipped with the backup pad, the backup pad movably mounted in the guiding axle, the elastic component cover that floats is located the guiding axle, the both ends of the elastic component that floats respectively the butt in the tensioning seat with the backup pad.

In one embodiment, the floating assemblies are provided with at least two floating assemblies, and the at least two floating assemblies are respectively arranged on two sides of the surface of the tensioning seat and connected with the roller assemblies.

In one embodiment, the tensioning seat comprises a first clamping plate and a second clamping plate which are connected, and the inner side of at least one of the first clamping plate and the second clamping plate is provided with a clamping groove matched with the transmission belt.

The roller coating equipment comprises a base plate, a roller coating executing device and the lifting device, wherein the lifting device is installed on the base plate, and the roller coating executing device is installed on the transmission belt of the other side, far away from the installation seat.

When the roller coating equipment is used, the tensioning seat is arranged on one transmission belt, and the roller component is abutted to the transmission belt on the other side. When the transmission belt is in normal transmission, namely the transmission belt has qualified tension, the transmission belt compresses the roller assembly to enable the roller assembly to move along the direction close to the tension seat, and then the limiting mechanism is driven to move along the direction close to the braking mechanism until the limiting mechanism is in limiting fit with the braking mechanism, so that the braking mechanism is not in contact with the mounting frame, and at the moment, the lifting device can normally operate. When the transmission belt has transmission abnormality, such as transmission belt aging, transmission belt fracture and the like, the roller components are pressed down due to insufficient tension of the transmission belt, so that the limiting mechanism can move in the direction away from the braking mechanism under the action of the floating components to release the braking mechanism, and the braking mechanism is contacted with the mounting frame to prevent the load mounted on the transmission belt from falling. So, under straining device, arrestment mechanism and stop gear's cooperation, can prevent that the load from falling, guarantee safety in utilization.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

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

Fig. 1 is a schematic structural diagram of a lifting device according to an embodiment of the present invention;

FIG. 2 is an enlarged partial view of FIG. 1 at A;

FIG. 3 is a front view of the lifting device shown in FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a schematic view of the structure of the guide rail of the lifting device shown in FIG. 1;

FIG. 6 is a schematic view of a portion of the lifting device shown in FIG. 1;

FIG. 7 is a schematic structural diagram of a part of the lifting device shown in FIG. 6 when a transmission abnormality occurs in the transmission belt;

FIG. 8 is a schematic structural view of a part of the structure of the lifting device shown in FIG. 6 when the transmission belt is in normal transmission;

FIG. 9 is a schematic structural view of a portion of the lifting device shown in FIG. 1 from another perspective;

fig. 10 is a partially enlarged schematic view at C in fig. 9.

Reference numerals: 10. a mounting frame; 11. a frame body; 12. a guide rail; 121. an insertion hole; 13. a slider; 20. a drive mechanism; 21. a driven wheel; 22. a transmission belt; 30. a tensioning mechanism; 31. a tensioning seat; 311. a first splint; 312. a second splint; 313. a clamping groove; 32. a roller assembly; 321. a rotating shaft; 322. a roller; 323. a supporting seat; 324. a support plate; 33. a floating assembly; 331. a floating elastic member; 332. a guide shaft; 40. a brake mechanism; 41. mounting a plate; 411. a shaft hole; 42. a braking elastic member; 43. a brake shaft; 44. a sliding sleeve; 50. a limiting mechanism; 51. and a limiting plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1, 2, 7 and 8, a lifting device according to an embodiment of the present invention includes a mounting frame 10, a driving mechanism 20, a tensioning mechanism 30, a braking mechanism 40 and a limiting mechanism 50. The driving mechanism 20 includes a driving wheel, a driven wheel 21 and a transmission belt 22, the driving wheel and the driven wheel 21 are respectively installed at two ends of the mounting rack 10 in the height direction, and the transmission belt 22 surrounds the driving wheel and the driven wheel 21. The tensioning mechanism 30 includes a tensioning seat 31, a roller assembly 32 and a floating assembly 33 located between the roller assembly 32 and the tensioning seat 31, the tensioning seat 31 is installed on the belt 22 on one side, and the roller assembly 32 abuts against the belt 22 on the other side. The brake mechanism 40 is mounted to the tension seat 31. The limiting mechanism 50 is arranged on the roller assembly 32, and the limiting mechanism 50 limits the braking mechanism 40 when the transmission belt 22 normally runs; when the belt 22 is broken, the limiting mechanism 50 moves towards the belt 22 on the other side under the driving of the roller assembly 32 to release the braking mechanism 40, so that the braking mechanism 40 is in contact with the mounting frame 10 for braking.

In the above-mentioned lifting device, when in use, the tension seat 31 is installed on one of the belts 22, and the roller assembly 32 abuts against the other belt 22. When the transmission belt 22 normally transmits, that is, the transmission belt 22 has a qualified tension, the transmission belt 22 compresses the roller assembly 32, so that the roller assembly 32 moves along the direction close to the tension seat 31, and further drives the limiting mechanism 50 to move along the direction close to the braking mechanism 40 until the limiting mechanism 50 is in limiting fit with the braking mechanism 40, so that the braking mechanism 40 is not in contact with the mounting frame 10, and at this time, the lifting device can normally operate. When a transmission abnormality occurs in the transmission belt 22, such as the deterioration of the transmission belt 22, the breakage of the transmission belt 22, etc., since the tension of the transmission belt 22 is not enough to press down the roller assembly 32, the limiting mechanism 50 is moved in a direction away from the braking mechanism 40 by the floating assembly 33, and the braking mechanism 40 is released to contact the braking mechanism 40 with the mounting bracket 10, so as to prevent the load mounted on the transmission belt 22 from falling. Thus, under the cooperation of the tensioning mechanism 30, the braking mechanism 40 and the limiting mechanism 50, the load can be prevented from falling, and the use safety is ensured.

In one embodiment, referring to fig. 7, 8 and 10, the braking mechanism 40 includes a mounting plate 41, a braking elastic member 42 and a braking shaft 43. The mounting plate 41 is vertically arranged on at least one side of the tensioning mechanism 30, the mounting plate 41 is provided with at least one shaft hole 411 matched with the brake shaft 43, and the brake shaft 43 transversely and movably penetrates through the shaft hole 411. The braking elastic member 42 is transversely disposed between the tension seat 31 and the mounting plate 41, and both ends of the braking elastic member 42 in the transverse direction are respectively connected to the braking shaft 43 and the tension seat 31. Wherein, when the limiting mechanism 50 is in limiting fit with the brake shaft 43, the brake shaft 43 retracts; when the stopper mechanism 50 releases the brake shaft 43, the brake shaft 43 is extended by the brake elastic member 42. When the transmission belt 22 normally transmits, the transmission belt 22 presses the roller assembly 32, so that the limiting mechanism 50 is in positioning fit with the brake shaft 43, at the moment, the brake shaft 43 is in a retraction state, the brake shaft 43 is not in contact with the mounting frame 10, and the normal operation of the lifting device is ensured. When the driving belt 22 is abnormal, the limiting mechanism 50 releases the braking shaft 43, and the braking shaft 43 is ejected out under the action of the braking elastic piece 42 and props against the mounting frame 10 to brake so as to prevent the load from falling. In this way, the braking reaction of the braking mechanism 40 is independent of the speed, and when the transmission of the belt 22 is abnormal, the braking mechanism 40 operates immediately, thereby achieving a better braking effect. In addition, the braking mechanism 40 is a pure mechanical structure, and does not need electricity, thereby effectively avoiding safety failure caused by electric element faults. Specifically, referring to fig. 7, 8 and 10, a sliding sleeve 44 is disposed at the position of the shaft hole 411, and the braking shaft 43 is inserted into the sliding sleeve 44 and can slide in the sliding sleeve 44. In this manner, friction between the brake shaft 43 and the mounting plate 41 during retraction and extension is reduced.

Further, referring to fig. 7 and 8, the brake shaft 43 is provided with a shoulder. The limiting mechanism 50 comprises a limiting plate 51 extending from the roller assembly 32 in the direction close to the shaft shoulder, and the limiting plate 51 is provided with a limiting part for limiting and matching with the shaft shoulder. When the transmission belt 22 is in normal transmission, the limiting part clamps the position of the circumferential shoulder, so that the brake shaft 43 is kept in a retraction state, and the normal operation of the lifting device is ensured. So, simple structure guarantees braking reliability, prevents effectively that the load from falling.

Of course, in other embodiments, a magnet may be disposed on the limit plate 51 to be positioned and engaged with the braking shaft 43.

In one embodiment, referring to fig. 3, 4 and 5, the mounting bracket 10 includes a bracket body 11 and at least one guide rail 12, the at least one guide rail 12 is disposed along a height direction of the bracket body 11, and the at least one guide rail 12 is provided with at least one insertion hole 121 for fitting the brake shaft 43. The brake shaft 43 is disposed toward the guide rail 12, and the brake shaft 43 can be inserted into the insertion hole 121 when the stopper mechanism 50 is released. When the transmission belt 22 has abnormal transmission, the braking shaft 43 is ejected by the braking elastic member 42 and inserted into the insertion hole 121 to perform a braking function. Thus, the braking reliability can be ensured by the matching of the braking shaft 43 and the insertion hole 121, and the load can be effectively prevented from falling.

Further, referring to fig. 4 and 5, the insertion holes 121 are provided in plurality, and the insertion holes 121 are provided at intervals in the longitudinal direction of the guide rail 12. Alternatively, the plurality of insertion holes 121 are provided at equal intervals. In this way, when an abnormality occurs in the belt 22, the brake mechanism 40 can be quickly moved to the insertion hole 121 closest thereto and inserted into the insertion hole 121, thereby achieving braking and increasing the braking response speed.

Further, referring to fig. 3 and 4, the slide block 13 is fixed to the braking mechanism 40, and the braking mechanism 40 is capable of moving in the height direction of the frame body 11 by the cooperation of the guide rail 12 and the slide block 13. Therefore, the movement of the tensioning mechanism 30, the braking mechanism 40 and the limiting mechanism 50 has guidance, the swinging in the movement process is avoided, the braking reliability is ensured, and the load is effectively prevented from falling.

In one embodiment, referring to fig. 6, 7 and 8, the floating assembly 33 includes a floating elastic member 331 disposed in a first direction. One end of the floating elastic member 331 abuts against the tension seat 31, and the other end abuts against the bottom of the roller assembly 32. It will be appreciated that the first direction is perpendicular to the direction of travel of the belt 22. When the belt 22 is normally driven, the floating elastic member 331 is in a compressed state by the tension of the belt 22. When the transmission belt 22 is in abnormal transmission, the limiting mechanism 50 is separated from the braking mechanism 40 under the elastic force of the floating elastic member 331 due to insufficient tension of the transmission belt 22, so as to release the braking mechanism 40. In this way, when the transmission belt 22 has a transmission abnormality, the floating elastic member 331 can trigger the brake mechanism 40 to operate, so as to achieve brake automation and increase the brake response speed.

Further, referring to fig. 6, 7 and 8, the floating assembly 33 further includes a guide shaft 332 disposed in the first direction. The guide shaft 332 is fixed to the tension seat 31. The bottom of the roller assembly 32 is provided with a support plate 324, and the support plate 324 is movably mounted on a guide shaft 332. The floating elastic member 331 is sleeved on the guide shaft 332, and two ends of the floating elastic member 331 respectively abut against the tensioning seat 31 and the supporting plate 324. Specifically, the supporting plate 324 is provided with a through hole adapted to the guiding shaft 332, the guiding shaft 332 is movably disposed in the through hole, and a limiting cover is disposed at one end of the guiding shaft 332 far away from the tensioning seat 31. So, through setting up guiding axle 332 for the motion of roller assembly 32 and stop gear 50 has the guidance quality, and avoids roller assembly 32 and stop gear 50 to rock at the in-process of motion, guarantees braking effect.

In this embodiment, the limiting mechanism 50 is fixed to a support plate 321 at the bottom of the roller assembly 32. Of course, in other embodiments, the limiting mechanism 50 can be fixed on the rotating shaft 321 or the supporting seat 323 of the roller assembly 32.

Further, referring to fig. 9 and 10, at least two floating assemblies 33 are provided, and the at least two floating assemblies 33 are respectively installed at both sides of the surface of the tension seat 31 and connected with the roller assemblies 32. Therefore, the limiting mechanism 50 is effectively ensured to release the braking mechanism 40 under the action of the at least two floating assemblies 33, and the braking effect is ensured.

In the present embodiment, referring to fig. 9 and 10, four floating assemblies 33 are provided, and the four floating assemblies 33 are respectively fixed at four corners of the tensioning seat 31. Each floating assembly 33 includes a guiding shaft 332 and a floating elastic member 331 sleeved on the guiding shaft 332, the supporting plate 324 at the bottom of the roller assembly 32 is movably mounted on the guiding shaft 332, one end of the floating elastic member 331 abuts against the tensioning seat 31, and the other end abuts against the supporting plate 324.

In one embodiment, referring to fig. 2, 6 and 7, the tension seat 31 includes a first clamping plate 311 and a second clamping plate 312 connected. At least one of the first clamping plate 311 and the second clamping plate 312 is provided with a clamping groove 313 matched with the transmission belt 22 on the inner side. Specifically, the first clamping plate 311 is fixedly connected with the second clamping plate 312 by screws. During the use, the drive belt 22 wears to locate in the joint groove 313, through the fixed drive belt 22 of first splint 311 and the centre gripping of second splint 312, realizes the fixed connection of tensioning seat 31 and drive belt 22. In this manner, the belt 22 is not damaged and the grip is firm.

Referring to fig. 2, 6 and 7, the inner side of at least one of the first clamping plate 311 and the second clamping plate 312 refers to the side of the first clamping plate 311 facing the second clamping plate 312, and the side of the second clamping plate 312 facing the first clamping plate 311.

In the present embodiment, referring to fig. 6 and 7, a side of the second clamping plate 312 facing the first clamping plate 311 is provided with a clamping groove 313 adapted to the transmission belt 22.

In one embodiment, referring to fig. 7 and 8, the roller assembly 32 further includes a shaft 321 and a roller 322. A support base 323 is fixed to one side of the support plate 324, and the roller 322 is mounted to the support base 323 through a rotation shaft 321. When the belt conveyor is in use, the transmission belt 22 on one side is pressed on the roller 322, and rolling friction is formed between the roller 322 and the transmission belt 22, so that the abrasion of the transmission belt 22 and the roller 322 is reduced. In addition, the rollers 322 may also increase the tension of the belt 22.

Referring to fig. 1, 2, 7 and 8, a roll coating apparatus according to an embodiment of the present invention includes a base plate, a roll coating executing device, and a lifting device according to any of the embodiments. The lifting device is arranged on the chassis, and the roller coating executing device is arranged on a transmission belt 22 on the other side of the mounting seat far away from the mounting seat.

In use, the tensioning seat 31 is mounted to one of the belts 22, and the roller assembly 32 abuts the other belt 22. When the transmission belt 22 normally transmits, that is, the transmission belt 22 has a qualified tension, the transmission belt 22 compresses the roller assembly 32, so that the roller assembly 32 moves along the direction close to the tension seat 31, and further drives the limiting mechanism 50 to move along the direction close to the braking mechanism 40 until the limiting mechanism 50 is in limiting fit with the braking mechanism 40, so that the braking mechanism 40 is not in contact with the mounting frame 10, and at this time, the lifting device can normally operate. When a transmission abnormality occurs in the transmission belt 22, such as the deterioration of the transmission belt 22, the breakage of the transmission belt 22, etc., since the tension of the transmission belt 22 is not enough to press down the roller assembly 32, the limiting mechanism 50 is moved in a direction away from the braking mechanism 40 by the floating assembly 33, and the braking mechanism 40 is released to contact the braking mechanism 40 with the mounting bracket 10, so as to prevent the load mounted on the transmission belt 22 from falling. Thus, under the cooperation of the tensioning mechanism 30, the braking mechanism 40 and the limiting mechanism 50, the load can be prevented from falling, and the use safety is ensured.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A lifting device, comprising:

a mounting frame;

the driving mechanism comprises a driving wheel, a driven wheel and a transmission belt, the driving wheel and the driven wheel are respectively arranged at two ends of the mounting frame in the height direction, and the transmission belt surrounds the driving wheel and the driven wheel;

the tensioning mechanism comprises a tensioning seat, a roller assembly and a floating assembly positioned between the roller assembly and the tensioning seat, the tensioning seat is installed on the transmission belt on one side, and the roller assembly abuts against the transmission belt on the other side;

the brake mechanism is arranged on the tensioning seat; and

the limiting mechanism is arranged on the roller component, the limiting mechanism limits the braking mechanism when the transmission belt normally runs, and the limiting mechanism is driven by the roller component to move towards the transmission belt on the other side when the transmission belt is broken so as to release the braking mechanism, so that the braking mechanism is in contact with the mounting frame for braking.

2. The lifting device as claimed in claim 1, wherein the braking mechanism includes a mounting plate, a braking elastic member and a braking shaft, the mounting plate is vertically disposed on at least one side of the tensioning mechanism, the mounting plate is provided with at least one shaft hole adapted to the braking shaft, the braking shaft is transversely and movably inserted into the shaft hole, the braking elastic member is transversely disposed between the tensioning seat and the mounting plate, and the braking elastic member is respectively connected to the braking shaft and the tensioning seat along two transverse ends; when the limiting mechanism is in limiting fit with the brake shaft, the brake shaft retracts; when the limiting mechanism releases the brake shaft, the brake shaft extends out under the action of the brake elastic piece.

3. The lifting device as claimed in claim 2, wherein the brake shaft is provided with a shoulder, the limiting mechanism comprises a limiting plate extending from the roller assembly in a direction close to the shoulder, and the limiting plate is provided with a limiting portion for limiting and matching with the shoulder.

4. The lifting device as claimed in claim 2, wherein the mounting bracket comprises a bracket body and at least one guide rail, the at least one guide rail is arranged along the height direction of the bracket body, and the at least one guide rail is provided with at least one insertion hole for being matched with the brake shaft; the brake shaft is arranged towards the guide rail, and the brake shaft can be inserted into the insertion hole when the limiting mechanism is released.

5. The lifting device as claimed in claim 4, wherein the braking mechanism is fixed with a sliding block, and the braking mechanism can move along the height direction of the frame body under the cooperation of the guide rail and the sliding block.

6. The lifting device as claimed in claim 1, wherein the floating assembly comprises a floating elastic member disposed along a first direction, one end of the floating elastic member abuts against the tensioning seat, and the other end abuts against the bottom of the roller assembly; wherein the first direction is a direction perpendicular to the drive belt.

7. The lift device of claim 6, wherein the float assembly further comprises a guide shaft disposed in the first direction, the guide shaft being secured to the tension shoe; the bottom of wheel components is equipped with the backup pad, the backup pad movably mounted in the guiding axle, the elastic component cover that floats is located the guiding axle, the both ends of the elastic component that floats respectively the butt in the tensioning seat with the backup pad.

8. The lifting device as claimed in claim 1, wherein the floating assemblies are provided with at least two, at least two of the floating assemblies are respectively mounted on two sides of the surface of the tension seat and connected with the roller assemblies.

9. The lifting device as claimed in any one of claims 1 to 8, wherein the tension seat comprises a first clamping plate and a second clamping plate which are connected, and at least one of the first clamping plate and the second clamping plate is provided with a clamping groove on the inner side for adapting to the transmission belt.

10. A roller coating apparatus comprising a base pan, roller coating actuating means and a lifting means as claimed in any one of claims 1 to 9, said lifting means being mounted on said base pan and said roller coating actuating means being mounted on said drive belt on the other side of said mounting.

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