Mechanical chuck for wiping cloth winding drum of coating machine

Abstract

The mechanical chuck for the coating machine wiping cloth winding drum is used for clamping the winding drum and comprises a chuck body, a shaft cavity is formed in the chuck body in the axis direction of the chuck body, a plurality of long-strip-shaped holes distributed in the circumferential direction are formed in the positions, corresponding to the shaft cavity, of the outer circumferential face of the chuck body, and ejector blocks are movably arranged in the long-strip-shaped holes; a jacking reset mechanism is arranged in the shaft cavity and comprises a push rod movably arranged in the shaft cavity and connected with the jacking block and a driving piece connected with the push rod. The push rod is driven by the driving piece to rapidly jack up or fall back the ejector block, clamping and loosening of the winding drum can be rapidly completed, and the winding drum can be conveniently disengaged for reloading; in the process, the chuck body and the ejector block can provide stable clamping force for the winding drum, it is guaranteed that the winding drum does not shake or move, the clamping reliability is improved, and the uniformity and quality of the coating machine during coating can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of reel-in and reel-out clamping, in particular to a mechanical chuck for a coating machine wiping cloth roll. Background Art

[0002] The wiping cloth device of the coating machine is mainly composed of a positioning shaft, a one-way bearing, a ferrule and a spring. The reel is prone to generate a lot of dust and get stuck due to long-term friction with the positioning shaft. Therefore, in order to improve the above situation, the existing practice is to clamp the reel by two relatively moving chucks. The chucks usually adopt an air-expanding structure. The outer diameter of the chuck is expanded and pressed against the reel by increasing the air pressure. During the whole process, the pneumatic system of the air-expanding structure is always in working state, which is greatly affected by the sealing. When in use, the sealing is easily destroyed, resulting in reduced stability and reliability of the chuck, which is easy to cause the reel to shake or shift, affecting the uniformity and quality of the coating of the coating machine. Summary of the invention

[0003] The object of the present invention is to provide a mechanical chuck for a coating machine wiping cloth roll, which can provide a stable clamping force, ensure that the roll will not shake or displace, and improve the clamping reliability, so as to solve the problem of reduced stability and reliability of the chuck proposed in the above-mentioned background technology, which easily causes shaking or displacement of the roll.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A mechanical chuck for a coating machine wiping cloth roll is used to clamp the roll, comprising a chuck body, an axial cavity is formed inside the chuck body along its axial direction, a plurality of circumferentially distributed long holes are opened on the outer circumference of the chuck body corresponding to the axial cavity, a plurality of ejector blocks are movably arranged in the plurality of the long holes, a lifting and resetting mechanism is arranged in the axial cavity, and the lifting and resetting mechanism comprises a push rod movably arranged in the axial cavity and connected to the ejector block, and a driving member connected to the push rod.

[0006] Preferably, the outer peripheral surface of the push rod is provided with a plurality of circumferentially distributed first slopes, and the end surface of the top block extending into the shaft cavity is formed with a second slope adapted to the first slope.

[0007] Preferably, the chuck body is provided with an axial hole along the axial direction which passes through the axial cavity from the side end surface of the chuck body, and the push rod includes a push section located in the axial cavity and a sliding section connected to the push section, and the sliding section is slidably arranged in the axial hole away from one end of the push section and is connected to one end of the driving member.

[0008] Preferably, the diameter of the axial hole is smaller than the diameter of the axial cavity, and a first limiting surface is formed at the connection between the axial hole and the axial cavity.

[0009] Preferably, it includes a limit assembly respectively arranged at each elongated hole, the limit assembly includes a limit plate and a compression spring, the outer peripheral surface of the chuck body is provided with a mounting groove surrounding the periphery of the elongated hole, the limit plate is embedded in the mounting groove, a plate hole is provided in the middle of the limit plate, and the compression springs extending into the elongated hole are respectively connected to both sides of the inner wall of the limit plate facing the shaft cavity.

[0010] Preferably, both ends of the top block extend away from the top block to form side ears, and the side ears are formed with limit columns coaxially arranged with the compression spring, and one end of the compression spring is sleeved on the limit column and connected to the side ears.

[0011] Preferably, the lifting and resetting mechanism comprises a resetting spring, one end of which is connected to the inner wall of the shaft cavity, and the other end of which is connected to the push rod.

[0012] Preferably, one end of the chuck body is connected to a first sleeve, and one end of the first sleeve away from the chuck body is connected to the driving member.

[0013] Preferably, an annular groove surrounding the outer circumference of the shaft hole is formed on the end surface of the chuck body, and an outwardly protruding convex ring is provided on the end surface of the first sleeve facing the chuck body, and the convex ring is embedded in the annular groove.

[0014] Preferably, a protective shell with an inner cavity is sleeved on one end of the first sleeve away from the chuck body, the protective shell is formed by splicing two arc-shaped shells, the driving member is accommodated in the protective shell, and the protective shell is connected to a chuck sealing plate at one end opposite to the first sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The driving part drives the push rod to quickly lift or lower the top block, which can quickly complete the clamping and loosening of the roll, making it convenient for the roll to be removed and replaced; the chuck body and the top block can provide a stable clamping force for the roll to ensure that the roll will not shake or move, improve the clamping reliability, and help improve the uniformity and quality of the coating of the coater; at the same time, it can avoid damage to the roll and prevent deformation and damage to the roll due to uneven clamping force of the chuck or improper contact between the chuck and the roll.

[0017] 2. Both ends of the top block extend to the side away from the top block to form side ears, and the side ears are formed with limit columns coaxially arranged with the compression spring. One end of the compression spring is sleeved on the limit column and connected to the side ear. The limit column plays a positioning role, so that the compression spring is compressed or expanded in a straight line, which helps to improve the stability of ejection and resetting of the top block.

[0018] 3. Two opposite clamping grooves are formed on the side wall of the annular groove. Two opposite clamping protrusions are formed on the outer peripheral surface of the convex ring. The two clamping protrusions are respectively embedded in the corresponding clamping grooves to limit the relative rotation between the chuck body and the first shaft sleeve.

[0019] 4. The protective shell is formed by splicing two arc-shaped shells. The driving member is accommodated in the protective shell. A chuck sealing plate is connected to one end of the protective shell relative to the first shaft sleeve. The chuck sealing plate is connected to the protective shell by bolts, which is convenient for later maintenance and reduces the equipment use cost and maintenance difficulty. The protective shell plays a role in protecting the driving member and helps to extend the service life of the driving member. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of the mechanical chuck for the wiping cloth reel of the coating machine of the present invention;

[0021] Figure 2 is a front view of the mechanical chuck for the wiping cloth reel of the coating machine of the present invention;

[0022] Figure 3 is Figure 2 a cross-sectional view in the direction shown by section A-A in

[0023] Figure 4 is Figure 3 an enlarged view of B in

[0024] Figure 5 is an exploded view of the present invention;

[0025] Figure 6 is an exploded view of the present invention from another perspective;

[0026] Figure 7 is an exploded view of the lifting and reset mechanism and the limiting component of the present invention.

[0027] In the figure: 1. Chuck body; 11. Shaft cavity; 12. Long strip hole; 13. Shaft hole; 14. Installation groove; 15. Annular groove; 16. Clamping groove; 17. Second retaining ring; 2. Top block; 21. Second slope; 22. Side ear; 23. Limiting column; 24. Wear-resistant block; 3. Lifting and reset mechanism; 31. Push rod; 311. First slope; 312. Thrust section; 313. Sliding section; 32. Driving member; 33. Return spring; 4. Limiting component; 41. Limiting plate; 42. Compression spring; 5. First shaft sleeve; 51. Convex ring; 52. Clamping protrusion; 53. First retaining ring; 6. Synchronous pulley; 7. Second shaft sleeve; 71. Third retaining ring; 8. Bearing; 9. Protective shell; 10. Chuck sealing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "several" and "multiple" is two or more, unless otherwise specifically defined. In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc.

[0030] should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact of the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0031] Please refer to Figures 1-3 , a mechanical chuck for a wiping cloth reel of a coater, used for clamping the reel, including a chuck body 1, and the chuck body 1 is in the shape of a cylinder. An axial cavity 11 is formed inside the chuck body 1 along its axis direction. Please refer to Figure 7 , a plurality of circumferentially distributed long holes 12 are formed on the outer periphery of the chuck body 1 corresponding to the position of the axial cavity 11. The plurality of long holes 12 communicate with the axial cavity 11, and a top block 2 is movably arranged in the plurality of long holes 12. A lifting and reset mechanism 3 is arranged in the axial cavity 11. Please refer toFigure 3 The jacking and reset mechanism 3 includes a push rod 31 movably arranged in the shaft cavity 11 and connected to the top block 2, and a driving member 32 connected to the push rod 31. The push rod 31 jacks up the top block 2 from the long slot 12 under the drive of the driving member 32, so that the top block 2 abuts against the inner wall of the drum.

[0032] In this embodiment, the number of long slots 12 is four, and the number of top blocks 2 is four to evenly clamp the drum. However, the present invention does not limit the number of long slots 12 and top blocks 2, and the number of long slots 12 can be set according to requirements.

[0033] In the present invention, the driving member 32 drives the push rod 31 to quickly jack up or lower the top block 2, so that the clamping and loosening of the drum can be quickly completed, facilitating the removal of the drum for material change; during this process, the chuck body 1 and the top block 2 can provide a stable clamping force for the drum, ensuring that the drum does not shake or displace, improving the clamping reliability, and contributing to improving the uniformity and quality of coating during coating by the coater; at the same time, damage to the drum can be avoided, and deformation and damage of the drum caused by uneven clamping force of the chuck or improper contact mode between the chuck and the drum can be prevented.

[0034] Please refer to Figure 3 and Figure 7 , a plurality of first slopes 311 distributed circumferentially are provided on the outer peripheral surface of the push rod 31, and a second slope 21 adapted to the first slope 311 is formed on the end surface of the top block 2 extending into the shaft cavity 11. The first slope 311 and the second slope 21 are mutually fitted and are both inclined. Through the interaction of the first slope 311 and the second slope 21, the top block 2 can be quickly ejected or retracted. For example, when the push rod 31 squeezes the top block 2 forward, the top block 2 protrudes to the outside of the chuck body 1, and when the push rod 31 retreats, the top block 2 retracts into the long slot 12.

[0035] Please refer to Figure 3 , the chuck body 1 is axially provided with a shaft hole 13 penetrating from the side end surface of the chuck body 1 to the shaft cavity 11. The push rod 31 includes a pushing section 312 located in the shaft cavity 11 and a sliding section 313 connected to the pushing section 312. One end of the sliding section 313 away from the pushing section 312 is slidably arranged in the shaft hole 13 and is connected to one end of the driving member 32.

[0036] In this embodiment, the first slope 311 is formed on the outer peripheral surface of the pushing section 312, and the diameter of the shaft hole 13 is smaller than the diameter of the shaft cavity 11. Please refer to Figure 3 , a first limiting surface is formed at the connection between the shaft hole 13 and the shaft cavity 11. When the push rod 31 moves to the extreme position to the right, the end surface at the connection between the pushing section 312 and the sliding section 313 abuts against the first limiting surface, which is used to limit the further rightward movement of the pushing section 312 and plays a positioning role to prevent the top block 2 from disengaging from the long slot 12 when retracting.

[0037] See also Figures 3-4 and Figure 7 The mechanical chuck for the wiper roll of the coating machine includes a limit assembly 4 respectively arranged at each long hole 12. The limit assembly 4 includes a limit plate 41 and a compression spring 42. The outer peripheral surface of the chuck body 1 is provided with a mounting groove 14 surrounding the outer periphery of the long hole 12. The limit plate 41 is embedded in the mounting groove 14. A plate hole is provided in the middle of the limit plate 41 for the top block 2 to pass through. Please refer to Figure 7 In this embodiment, the limit plate 41 is fixed in the mounting groove 14 by bolts, and the inner wall of the limit plate 41 facing the shaft cavity 11 is respectively connected with the compression spring 42 extending into the long hole 12. The two ends of the top block 2 are respectively extended away from the top block 2 to form a side ear 22, and the side ear 22 is formed with a limit column 23 coaxially arranged with the compression spring 42, and one end of the compression spring 42 is sleeved on the limit column 23 and connected to the side ear 22.

[0038] Among them, see Figure 3 The lifting and resetting mechanism 3 includes a resetting spring 33, one end of which is connected to the inner wall of the shaft cavity 11, and the other end is connected to the push rod 31. In this embodiment, a receiving groove is provided on the end surface of the push section 312 of the push rod 31, and one end of the resetting spring 33 extends into the receiving groove and is connected to the bottom wall of the receiving groove.

[0039] When the ejector block 2 is squeezed by the push rod 31 and ejected out of the chuck body 1, the compression spring 42 and the return spring 33 are compressed; when the reel needs to be loosened, the return spring 33 pushes the push rod 31 backward, and at the same time, the ejector block 2 is quickly reset to the long hole 12 under the elastic force of the compression spring 42. The limiting column 23 plays a positioning role in this process, so that the compression spring 42 is compressed or expanded in a straight line, which helps to improve the stability of the ejection and reset of the ejector block 2.

[0040] See also Figure 1 and Figure 7 The outer wall of the top block 2 facing away from the shaft cavity 11 is detachably connected with a wear-resistant block 24, and the wear-resistant block 24 is accommodated in the plate hole of the limit plate 41. In this embodiment, the wear-resistant block 24 is arc-shaped relative to the outer wall of the top block 2, and the wear-resistant block 24 is fixed to the outer wall of the top block 2 by bolts, and contacts the inner wall of the reel through the wear-resistant block 24. When the wear-resistant block 24 is damaged or broken, the bolts can be loosened and replaced directly, avoiding the replacement of the top block 2 as a whole, which is conducive to improving the efficiency of later maintenance.

[0041] See also Figure 3 and Figures 5-6, one end of the chuck body 1 is connected with a first bushing 5, and one end of the first bushing 5 away from the chuck body 1 is connected with the driving member 32. The driving member 32 is a cylinder, and one end of the piston rod of the cylinder passes through the bushing and is connected with one end of the push rod 31, which is used to drive the push rod 31 to move forward or backward, so that the push rod 31 presses the top block 2. Please refer to Figure 5 , an annular groove 15 surrounding the outer periphery of the shaft hole 13 is formed on the end face of the chuck body 1. Please refer to Figure 6 , an outwardly protruding convex ring 51 is provided on the end face of the first bushing 5 facing the chuck body 1, and the convex ring 51 is embedded in the annular groove 15. Two opposite clamping grooves 16 are formed on the side wall of the annular groove 15, and two opposite clamping protrusions 52 are formed on the outer peripheral surface of the convex ring 51. The two clamping protrusions 52 are respectively embedded in the corresponding clamping grooves 16 to limit the relative rotation between the chuck body 1 and the first bushing 5.

[0042] Among them, please refer to Figure 3 , a first retaining ring 53 is formed on the outer peripheral surface of the first bushing 5, and a synchronous pulley 6 is fixedly sleeved on the outer peripheral surface of the first bushing 5. Please refer to Figures 5-6 , in this embodiment, a key groove is formed on the inner wall of the synchronous pulley 6, and a convex key is provided on the outer peripheral surface of the first bushing 5 and is fitted in the key groove. Through the cooperation of the key groove and the convex key, the relative rotation between the first bushing 5 and the synchronous pulley 6 is restricted. When the synchronous pulley 6 is connected to an external motor through a belt or a gear, under the drive of the external motor, the synchronous pulley 6 rotates. Under the drive of the synchronous pulley 6, the first bushing 5 and the chuck body 1 rotate together, so that the chuck body 1 drives the reel to rotate, thereby realizing the winding operation of the reel.

[0043] Please refer to Figure 1 , a second retaining ring 17 is formed on the outer peripheral surface of the chuck body 1, and one side wall of the second retaining ring 17 is clamped on the end face of the reel. A second bushing 7 is sleeved on the periphery of the chuck body 1, and a bearing 8 is installed between the inner wall of the second bushing 7 and the outer wall of the chuck body 1, so that the chuck body 1 can rotate relative to the second bushing 7. A third retaining ring 71 is formed on the outer peripheral surface of the second bushing 7.

[0044] Please refer to Figure 3 and Figure 7 , a protective shell 9 with an inner cavity is sleeved on one end of the first bushing 5 away from the chuck body 1. The protective shell 9 is formed by splicing two arc-shaped shells. The driving member 32 is accommodated in the protective shell 9, and a chuck sealing plate 10 is connected to one end of the protective shell 9 relative to the first bushing 5. In this embodiment, the chuck sealing plate 10 is connected to the protective shell 9 by bolts, which is convenient for later maintenance, reduces the equipment use cost and maintenance difficulty; the protective shell 9 plays a role in protecting the driving member 32 and helps to extend the service life of the driving member 32.

[0045] The working principle of the mechanical chuck for the wiping cloth reel of the present invention is as follows: Please refer to Figure 3 , when clamping the reel, the push rod 31 moves forward driven by the driving member 32, and continuously squeezes the second ramp 21 through the first ramp 311, so as to push out the four top blocks 2 from the long strip holes 12 to the outside of the chuck body 1 respectively, so that the wear-resistant blocks 24 on the top blocks 2 abut against the inner wall of the reel. During this process, the compression spring 42 and the return spring 33 are continuously compressed; when it is necessary to loosen the reel, the push rod 31 moves backward under the elastic force of the return spring 33, and the top block 2 and the wear-resistant block 24 quickly retract into the long strip holes 12 under the elastic force of the compression spring 42, facilitating the removal of the reel for material replacement. During the above process, the first ramp 311 and the second ramp 21 always remain in a fitting state, facilitating stable support.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical chuck for a wiping cloth reel of a coater, used to clamp the reel, comprising a chuck body (1), characterized in that: An axial cavity (11) is formed inside the chuck body (1) along its axial direction, and a plurality of circumferentially distributed long holes (12) are opened on the outer peripheral surface of the chuck body (1) at positions corresponding to the axial cavity (11), and a plurality of elongated holes (12) are movably arranged in the elongated holes (12), and a lifting and resetting mechanism (3) is arranged in the axial cavity (11), and the lifting and resetting mechanism (3) comprises a push rod (31) movably arranged in the axial cavity (11) and connected to the push rod (2), and a driving member (32) connected to the push rod (31).

2. The mechanical chuck for the coating machine wiping cloth roll according to claim 1, characterized in that: The outer peripheral surface of the push rod (31) is provided with a plurality of circumferentially distributed first slopes (311), and the end surface of the top block (2) extending into the shaft cavity (11) is formed with a second slope (21) adapted to the first slope (311).

3. The mechanical chuck for the coating machine wiping cloth reel according to claim 1, characterized in that: The chuck body (1) is provided with an axial hole (13) extending from the side end surface of the chuck body (1) to the axial cavity (11) along the axial direction. The push rod (31) includes a push section (312) located in the axial cavity (11) and a sliding section (313) connected to the push section (312). The sliding section (313) is slidably arranged in the axial hole (13) away from one end of the push section (312) and is connected to one end of the driving member (32).

4. The mechanical chuck for the coating machine wiping cloth roll according to claim 3, characterized in that: The diameter of the shaft hole (13) is smaller than the diameter of the shaft cavity (11), and a first limiting surface is formed at the connection between the shaft hole (13) and the shaft cavity (11).

5. The mechanical chuck for the coating machine wiping cloth roll, as claimed in claim 1, wherein: The invention comprises a limit assembly (4) respectively arranged at each elongated hole (12), wherein the limit assembly (4) comprises a limit plate (41) and a compression spring (42), wherein the outer peripheral surface of the chuck body (1) is provided with a mounting groove (14) surrounding the outer periphery of the elongated hole (12), the limit plate (41) is embedded in the mounting groove (14), a plate hole is provided in the middle of the limit plate (41), and the inner wall of the limit plate (41) facing the shaft cavity (11) is respectively connected with the compression spring (42) extending into the elongated hole (12).

6. The mechanical chuck for the wiping cloth roll of the coater according to claim 5, characterized in that: Both ends of the top block (2) extend toward a side away from the top block (2) to form side ears (22), and a limiting column (23) coaxially arranged with a compression spring (42) is formed on the side ear (22), and one end of the compression spring (42) is sleeved on the limiting column (23) and connected to the side ear (22).

7. The mechanical chuck for the coating machine wiping cloth roll, characterized in that: The lifting and resetting mechanism (3) comprises a resetting spring (33), one end of which is connected to the inner wall of the shaft cavity (11), and the other end of which is connected to the push rod (31).

8. The mechanical chuck for the wiping cloth roll of the coater according to any one of claims 1-7, characterized in that: One end of the chuck body (1) is connected to a first shaft sleeve (5), and one end of the first shaft sleeve (5) away from the chuck body (1) is connected to the driving member (32).

9. The mechanical chuck for the coating machine wiping cloth reel according to claim 8, wherein: The end surface of the chuck body (1) is provided with an annular groove (15) surrounding the outer periphery of the shaft hole (13); the end surface of the first sleeve (5) facing the chuck body (1) is provided with an outwardly protruding convex ring (51); the convex ring (51) is embedded in the annular groove (15).

10. The mechanical chuck for the coating machine wiping cloth reel according to claim 8, characterized in that: A protective shell (9) with an inner cavity is sleeved at one end of the first bushing (5) away from the chuck body (1). The protective shell (9) is formed by splicing two arc-shaped shells. The driving member (32) is accommodated in the protective shell (9). A chuck sealing plate (10) is connected to one end of the protective shell (9) opposite to the first bushing (5).

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