A bobbin gripping and levelling device for a sliver lap former

Abstract

The present application belongs to the matching components used in cotton spinning machine sliver combining and winding machine, in particular to a sliver combining and winding machine bobbin grabbing and leveling device, comprising an upper jaw arm, a pushing cylinder, a supporting roller, a lower jaw arm and a jaw hand supporting arm, a group of concentric shaft sleeves and a group of eccentric shaft sleeves are arranged on the upper jaw arm, the supporting roller is arranged on the lower jaw arm, the bobbin is clamped between the eccentric shaft sleeve, the concentric shaft sleeve and the supporting roller to form three-point positioning; the present application forms three-point positioning clamping through the eccentric shaft sleeve and the concentric shaft sleeve and the supporting roller which can rotate independently on the upper jaw arm, changes the contact position between the outer surface of the eccentric shaft sleeve and the bobbin by rotating the eccentric shaft sleeve, solves the technical problems that the bobbin cannot be kept horizontal after being grabbed, the winding disc clamping is inclined or unreliable due to the machining or assembly error of the upper jaw arm, achieves the effects of compensating the positioning deviation, ensuring the bobbin to be sent to the winding disc horizontally, improving the winding disc clamping accuracy and reliability.

Description

Technical Field

[0001] This invention pertains to a component used in cotton spinning machinery, specifically a bobbin gripping and leveling device for a sliver lapping machine. Background Technology

[0002] During the operation of the spool winding machine, the spool needs to be sent between the two winding discs on the left and right by the spool gripping device, and the spool is handed over after being clamped by the winding discs.

[0003] The existing tube gripping device mainly includes an upper gripper arm, a lower gripper arm, a push cylinder, a support roller, and a gripper support arm. The upper gripper arm is fixed to the end of the gripper support arm, and the lower gripper arm is rotatably positioned below the upper gripper arm via a rotating shaft. The push cylinder drives the lower gripper arm to swing, clamping the tube between the upper gripping groove of the upper gripper arm and the lower gripping groove of the lower gripper arm. The horizontal positioning of the tube is achieved by a bracket and positioning rod set on the upper gripper arm, while the support roller only serves a clamping and supporting function.

[0004] Because the upper claw arm is formed by bending sheet metal, height deviations are prone to occur on the left and right sides during processing and welding. Furthermore, the bracket cannot be adjusted after welding and fixing. When the bracket is not horizontal due to the above errors, the tube will tilt after being gripped and cannot be horizontally fed between the coiling discs. This leads to problems such as clamping deviation, unreliable clamping, or even damage to the tube when the coiling discs are clamped, affecting the normal operation of the equipment. The existing structure does not have an adjustment function, and it needs to be returned to the factory for repair after problems occur, resulting in a long debugging cycle and high maintenance costs.

[0005] Therefore, it is necessary to improve the bobbin gripping device of the existing spool winding machine so that it can adjust the horizontal state of the bobbin, compensate for the positioning deviation caused by processing or assembly errors, and ensure that the bobbin can be fed horizontally between the winding discs. Summary of the Invention

[0006] In view of this, the present invention provides a bobbin gripping and leveling device for a strip winding machine. This device uses an independently rotatable and adjustable eccentric bushing on the upper claw arm, along with a concentric bushing and a support roller, to form a three-point positioning clamping mechanism. By rotating the eccentric bushing, the contact position between its outer circular surface and the bobbin is changed. This solves the technical problems caused by machining or assembly errors of the upper claw arm, such as the bobbin not remaining horizontal after being gripped, and the winding disc clamping being skewed or unreliable. It achieves the effects of compensating for positioning deviations, ensuring the bobbin is horizontally fed between the winding discs, and improving the accuracy and reliability of the winding disc clamping.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A bobbin gripping and leveling device for a spool winding machine is used to grip the bobbin and place it horizontally between two winding discs. The bobbin gripping and leveling device includes: an upper gripper arm, a push cylinder, a support roller, a lower gripper arm, and a gripper support arm, wherein:

[0009] The claw support arm is mounted on the tube gripping support frame of the strip winding machine via a rotating assembly, and rotates along with the rotating assembly. Two coiling discs are located on the tube gripping support frame.

[0010] The upper claw arm is located at the end of the claw support arm. The upper claw arm has an upper gripping tube groove. The upper gripping tube groove has a set of concentric bushings at the end near the claw support arm and a set of eccentric bushings at the end away from the claw support arm. The upper gripping tube groove is located between the set of concentric bushings and the set of eccentric bushings. The upper gripping tube groove is adapted to the circumferential diameter of the tube.

[0011] The lower claw arm is rotatably positioned below the upper claw arm via a rotating shaft, and the rotating shaft is located on one side of a set of concentric bushings. The lower claw arm has a lower gripping tube groove, and the lower gripping tube groove corresponds to the upper gripping tube groove. The lower gripping tube groove has a support roller at the end away from the rotating shaft.

[0012] In addition, a push cylinder is provided between the upper claw arm and the lower claw arm. The cylinder body of the push cylinder is located on the upper claw arm, and the piston end of the push cylinder is connected to the lower claw arm. When the piston end of the push cylinder extends, the upper claw arm and the lower claw arm open accordingly. When the piston end of the push cylinder retracts, the tube is gripped between the upper gripping tube groove and the lower gripping tube groove, and the tube is simultaneously located between the eccentric bushing, the concentric bushing, and the support roller.

[0013] The eccentric bushing has a mounting hole, the center of which is offset from the center of the outer circle of the eccentric bushing, so as to change the contact position between the outer circle surface of the eccentric bushing and the tube when adjusting the rotation angle of the eccentric bushing, thereby adjusting the horizontal state of the tube.

[0014] Preferably, the rotating assembly includes a rotating tube rotatably mounted on the gripper support frame, the rotating tube being fixedly connected to the gripper support arm, and a swing cylinder being provided at the end of the rotating tube, the rotation of the rotating tube being achieved by the swinging operation of the swing cylinder.

[0015] Preferably, the upper claw arm, lower claw arm, and claw support arm are all U-shaped connecting parts, and the concentric bushing and eccentric bushing are respectively fixed to the side wall of the U-shaped connecting part of the upper claw arm by bolts.

[0016] Preferably, a set of eccentric bushings specifically includes two eccentric bushings, and both eccentric bushings are independently rotated and fixed with the bolt as the axis by bolts;

[0017] A set of concentric bushings specifically includes two concentric bushings, and both concentric bushings are fixed to the upper claw arm by bolts.

[0018] Preferably, the upper claw arm is provided with a baffle near the eccentric bushing.

[0019] The beneficial effects of this invention are as follows:

[0020] In general, this invention replaces the original fixed bracket and positioning rod structure with an eccentric bushing structure, giving the cylinder positioning position an adjustable function. When the upper claw arm is asymmetrical due to sheet metal processing errors or assembly errors, the contact position between its outer circular surface and the cylinder can be changed by adjusting the rotation angle of the eccentric bushing, compensating for the positioning deviation. This ensures that the cylinder remains horizontal after being gripped, ensuring that the cylinder axis is aligned with the center of the two coiling discs on the left and right, and improving the accuracy and reliability of the coiling discs clamping the cylinder.

[0021] In addition, the present invention adopts a structure in which the upper claw arm has an upper gripping groove and the lower claw arm has a lower gripping groove. After the tube is gripped, it is simultaneously located between the eccentric bushing, the concentric bushing and the support roller, forming a stable three-point positioning clamp. The clamping is stable and reliable, effectively preventing the tube from moving or deviating during the transfer process.

[0022] Based on this, the two eccentric bushings of the present invention are independently fixed to the upper claw arm by bolts, and can be independently rotated and adjusted during debugging, which is simple to operate; after adjustment, the locking bolts can be tightened to keep the position fixed, without the need for repeated adjustment, which is convenient for maintenance.

[0023] Furthermore, this invention replaces and improves only the positioning components while retaining the original main structure. The structural changes are minor and the modification cost is low. It does not require replacing the entire production line equipment, and has good economic benefits and prospects for widespread application. It can effectively reduce problems such as the coiling disc failing to clamp the bobbin, clamping deviation, or damaging the bobbin, improve the stability of the bobbin handover operation, ensure the continuous normal operation of the strip winding machine, and reduce equipment failure rate and maintenance costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the fixed support and positioning rod structure in the existing strip winding machine's bobbin gripping device;

[0026] Figure 2 This is a schematic diagram of the cooperation structure between the tube gripping and leveling device and the strip winding machine in this invention;

[0027] Figure 3This is a schematic diagram of the overall structure of the tube gripping and leveling device in this invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In existing spool winding machine tube gripping devices, such as Figure 1 As shown, the upper claw arm typically uses a welded and fixed bracket 1 and a positioning rod 2 installed on the upper claw arm to achieve the horizontal positioning of the bobbin 3. After the bracket 1 is welded to the upper claw arm, its position is fixed. The upper claw arm is a sheet metal part that is bent and formed. During the processing and welding process, the left and right sides are prone to height deviation, which causes the bracket 1 and the positioning rod 2 to be not in a horizontal state. Moreover, this structure does not have an adjustment function. This application proposes a bobbin gripping and leveling device for a strip winding machine to solve the above problems.

[0031] This embodiment provides a bobbin gripping and leveling device for a spool winding machine, used to grip the bobbin 3 and place it horizontally between two left and right winding discs 4, such as... Figures 2 to 3 As shown, the tube gripping and leveling device includes an upper claw arm 5, a push cylinder 501, a lower claw arm 6, a support roller 601, and a claw support arm 7.

[0032] Among them, such as Figure 2As shown, the gripper support arm 7 is mounted on the tube gripping support frame 8 of the strip winding machine via a rotating assembly, and can rotate with the rotating assembly. The rotating assembly includes a rotating tube 801 rotatably mounted on the tube gripping support frame 8. The rotating tube 801 is fixedly connected to the gripper support arm 7. One end of the rotating tube 801 is equipped with a swing cylinder. When the swing cylinder is activated, it drives the rotating tube 801 to rotate, thereby realizing the rotation of the gripper support arm 7. The swing cylinder is not shown in the figure, and the swing cylinder used to control the rotation of the rotating tube 801 is prior art and will not be specifically described in this application. In addition, two coiling discs 4 are located on the tube gripping support frame 8.

[0033] like Figure 3 As shown, the upper claw arm 5 is located at the end of the claw support arm 7. The upper claw arm 5 is provided with an upper gripping tube groove 502. The upper gripping tube groove 502 is provided with a set of concentric bushings 9 at the end near the claw support arm 7 and a set of eccentric bushings 10 at the end away from the claw support arm 7. The upper gripping tube groove 502 is located between the set of concentric bushings 9 and the set of eccentric bushings 10. The upper gripping tube groove 502 is adapted to the circumferential diameter of the tube.

[0034] The lower claw arm 6 is rotatably positioned below the upper claw arm 5 via a rotating shaft 602, and the rotating shaft 602 is located on one side of the concentric bushing 9. The lower claw arm 6 is provided with a lower gripping tube groove 603, and the lower gripping tube groove 603 corresponds to the upper gripping tube groove 502. The lower gripping tube groove 603 is provided with a support roller 601 at the end away from the rotating shaft 602.

[0035] Both the upper claw arm 5 and the lower claw arm 6 are U-shaped connecting parts, and the upper claw arm 5, the lower claw arm 6 and the claw support arm 7 are all U-shaped structures to form a gripping space for the tube 3; on this basis, the concentric bushing 9 and the eccentric bushing 10 are respectively fixed to the side wall of the U-shaped connecting part of the upper claw arm 5 by bolts.

[0036] A push cylinder 501 is provided between the upper claw arm 5 and the lower claw arm 6. The cylinder body of the push cylinder 501 is located on the upper claw arm 5, and the piston end of the push cylinder 501 is connected to the lower claw arm 6. When the piston end of the push cylinder 501 extends, the upper claw arm 5 and the lower claw arm 6 open accordingly. When the piston end of the push cylinder 501 retracts, the cylinder 3 is gripped between the upper gripping groove 502 and the lower gripping groove 603, and the cylinder 3 is simultaneously located between the eccentric bushing 10, the concentric bushing 9 and the support roller 601.

[0037] Based on the above embodiments, this application provides the basic structure of the "gripping" part of the bobbin gripping and leveling device. In this structure, the upper claw arm 5 and the lower claw arm 6 open and close to clamp the bobbin 3 via a cylinder 501. After being clamped, the bobbin 3 is simultaneously positioned between two sets of concentric bushings 9, two sets of eccentric bushings 10, and a support roller 601, forming a stable three-point positioning clamp. The two sets of concentric bushings 9 serve as fixed support points at the root of the upper gripping groove 502, and the two sets of eccentric bushings 10 serve as positioning points at the opening of the upper gripping groove 502. The support roller 601 clamps and supports the bobbin 3 from below. The combined action of these three elements ensures that the bobbin 3 is evenly stressed and stably positioned after being clamped, preventing it from shifting or tilting, thus providing a good positioning foundation for the subsequent clamping of the coiled disc 4. The entire device has a compact structure and reliable clamping.

[0038] Next, this application will provide a detailed description of the specific structure and adjustment method of the "leveling" part in the tube gripping and leveling device.

[0039] like Figure 3 As shown, a set of concentric bushings 9 includes two concentric bushings 9, and a set of eccentric bushings 10 includes two eccentric bushings 10. The two concentric bushings 9 and the two eccentric bushings 10 are respectively arranged in a one-to-one correspondence. The two concentric bushings 9 and the two eccentric bushings 10 are all fixed to the side wall of the upper claw arm 5 by bolts. The concentric bushings 9 remain in the same position after being fixed by bolts, while the eccentric bushings 10 can rotate independently around the bolt axis and be re-fixed after the bolts are loosened.

[0040] The eccentric bushing 10 has a mounting hole, the center of which is offset from the center of the outer circle of the eccentric bushing 10. Due to this eccentric structure, when the bolts of the eccentric bushing 10 are loosened and the eccentric bushing 10 is rotated during adjustment, the contact position between the outer surface of the eccentric bushing 10 and the cylinder 3 will change, thereby altering the support height and force posture of the cylinder 3 in the gripping state, and thus adjusting the horizontal state of the cylinder 3. The mounting hole center of the concentric bushing 9 coincides with the center of the outer circle, mainly used to provide stable support for the cylinder 3, and together with the eccentric bushing 10, forms a clamping and positioning fit.

[0041] In addition, such as Figure 3 As shown, a baffle 503 is provided at the position of the upper claw arm 5 near the eccentric bushing 10. The baffle 503 is used to support the tube 3 when it enters the gripping position.

[0042] In general, when the spool winding machine is working, the bobbin 3 first enters the gripping position, that is, between the upper gripping groove 502 and the lower gripping groove 603. The swing cylinder drives the rotating tube 801 to rotate the claw support arm 7 to the gripping position, and pushes the cylinder 501 to move the lower claw arm 6 relative to the upper claw arm 5. The bobbin 3 is clamped between the upper gripping groove 502 and the lower gripping groove 603, and is simultaneously located between the eccentric bushing 10, the concentric bushing 9 and the support roller 601, forming a stable three-point positioning clamping.

[0043] Subsequently, based on the horizontal state of the bobbin 3, the angle of the eccentric sleeve 10 is adjusted to change the contact position between the outer surface of the eccentric sleeve 10 and the bobbin 3. This compensates for the left-right height deviation of the upper claw arm 5 caused by sheet metal processing errors or assembly errors, thus keeping the bobbin 3 horizontal. After adjustment, tightening the fixing bolts of the eccentric sleeve 10 will hold it in the adjusted angular position. Thereafter, during normal operation of the equipment, the eccentric sleeve 10 remains fixed, and this horizontal state is maintained stably for a long time. There is no need to repeat the adjustment every time the bobbin 3 is gripped. Adjustment is only required during the initial commissioning of the equipment or when recalibration is needed after maintenance or replacement of parts.

[0044] After the bobbin 3 is leveled and fed between the two coiling discs 4 on the left and right, the coiling discs 4 clamp the bobbin 3 to complete the handover. Then, the cylinder 501 is pushed to reset, and the claw support arm 7 drives the upper claw arm 5 and the lower claw arm 6 to move up or out, completing one gripping, leveling and handover process.

[0045] As can be seen, by changing the original fixed bracket 1 and positioning rod 2 structure to an eccentric bushing 10 structure, the positioning position of the tube 3 becomes adjustable; at the same time, the concentric bushing 9 and the eccentric bushing 10 form a stable clamping structure, which not only ensures the horizontal state of the tube 3 after it is gripped, but also improves the accuracy and reliability of the coiling disc 4 clamping the tube 3. The structure is simple, easy to debug, and has low modification cost.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bobbin gripping and leveling device for a spool winding machine, used to grip the bobbin and place it horizontally between two winding discs, characterized in that, The tube gripping and leveling device includes: an upper gripper arm, a push cylinder, a support roller, a lower gripper arm, and a gripper support arm, wherein: The claw support arm is mounted on the tube gripping support frame of the strip winding machine via a rotating assembly, and rotates along with the rotating assembly. Two coiling discs are located on the tube gripping support frame. The upper claw arm is located at the end of the claw support arm. The upper claw arm has an upper gripping tube groove. The upper gripping tube groove has a set of concentric bushings at the end near the claw support arm and a set of eccentric bushings at the end away from the claw support arm. The upper gripping tube groove is located between the set of concentric bushings and the set of eccentric bushings. The upper gripping tube groove is adapted to the circumferential diameter of the tube. The lower claw arm is rotatably positioned below the upper claw arm via a rotating shaft, and the rotating shaft is located on one side of a set of concentric bushings. The lower claw arm has a lower gripping tube groove, and the lower gripping tube groove corresponds to the upper gripping tube groove. The lower gripping tube groove has a support roller at the end away from the rotating shaft. In addition, a push cylinder is provided between the upper claw arm and the lower claw arm. The cylinder body of the push cylinder is located on the upper claw arm, and the piston end of the push cylinder is connected to the lower claw arm. When the piston end of the push cylinder extends, the upper claw arm and the lower claw arm open accordingly. When the piston end of the push cylinder retracts, the tube is gripped between the upper gripping tube groove and the lower gripping tube groove, and the tube is simultaneously located between the eccentric bushing, the concentric bushing, and the support roller. The eccentric bushing has a mounting hole, the center of which is offset from the center of the outer circle of the eccentric bushing, so as to change the contact position between the outer circle surface of the eccentric bushing and the tube when adjusting the rotation angle of the eccentric bushing, thereby adjusting the horizontal state of the tube.

2. The bobbin gripping and leveling device for a sliver winding machine according to claim 1, characterized in that: The rotating assembly includes a rotating tube rotatably mounted on the gripper support frame. The rotating tube is fixedly connected to the gripper support arm. The end of the rotating tube is equipped with a swing cylinder, and the rotation of the rotating tube is achieved by the swinging operation of the swing cylinder.

3. The bobbin gripping and leveling device for a sliver winding machine according to claim 2, characterized in that: The upper claw arm, lower claw arm, and claw support arm are all U-shaped connecting parts, and the concentric bushing and eccentric bushing are respectively fixed to the side wall of the U-shaped connecting part of the upper claw arm by bolts.

4. The bobbin gripping and leveling device for a strip winding machine according to claim 3, characterized in that: A set of eccentric bushings specifically includes two eccentric bushings, and both eccentric bushings are independently rotated and fixed with the bolt as the axis by bolts; A set of concentric bushings specifically includes two concentric bushings, and both concentric bushings are fixed to the upper claw arm by bolts.

5. The bobbin gripping and leveling device for a strip winding machine according to claim 4, characterized in that: The upper claw arm is equipped with a baffle near the eccentric bushing.

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