A yarn clamp for spinning frame spindle and working method thereof

Abstract

The present invention provides a yarn clamp for a spinning frame spindle and a working method thereof, comprising an intermediate base, a knife seat coaxially fixed on the top of the intermediate base, a sliding sleeve coaxially sleeved outside the intermediate base and sliding up and down, an upper sealing ring, an upper locking ring, a compression spring, a ball, a lower sealing ring, and a lower locking ring sequentially installed between the sliding sleeve and the intermediate base from top to bottom; the compression spring always presses the upper locking ring and the upper sealing ring on the top of the sliding sleeve, and the lower sealing ring and the lower locking ring are always fixed with the position of the sliding sleeve; when the spinning frame spindle rotates, the ball is close to the inclined slideway of the inner wall of the sliding sleeve and generates centrifugal force, pushing the sliding sleeve to slide downward, so that the top surface of the sliding sleeve and the knife seat are closely fitted until they are separated. With the present invention, during the opening and closing process of the yarn clamp, the upper and lower sealing rings follow the sliding sleeve to slide back and forth up and down, and the sealing is always maintained during the sliding process, so as to prevent dust from entering the yarn clamp during use. With the knife seat structure of the present invention, it is more conducive to cutting the yarn.

Description

Technical Field

[0001] The invention relates to a spinning frame, in particular to a yarn clamp. Background Art

[0002] When the spindle of the spinning frame is working, the rotation of the spindle drives the yarn clamp to rotate at high speed. Under the influence of different speeds, the yarn clamp is opened and closed to achieve the effect of clamping or releasing the yarn. When the tube is pulled out, the blade of the yarn clamp cuts the yarn on the tube, and the remaining yarn will not be taken out by the tube.

[0003] At present, the loading element for clamping the yarn in the yarn clamp on the market is formed by a spring. A plurality of ball-shaped unloading elements are arranged in the yarn clamp, which can move radially under the action of centrifugal force and squeeze the inclined guide surface on the outer shell of the yarn clamp. The squeezed guide inclined surface of the yarn clamp slips, causing the clamp to move axially and open or close. When the spindle is in a rotating state, the centrifugal force of the ball changes with the change of the spindle speed. When the speed increases, the unloading force generated by the centrifugal force is greater than the loading force of the spring, and the yarn clamp opens. When the spindle is braked, the speed decreases, and the centrifugal force of the ball is less than the loading force of the spring, so that the yarn clamp closes. However, when encountering coarse yarn or nylon yarn, the existing blade of the yarn clamp may not be easy to cut the yarn. In addition, the yarn clamp is affected by the working environment during use, and the dust in the workshop will enter the interior of the yarn clamp, which will affect the closing of the yarn clamp after a long time, thereby destroying the yarn cutting effect. Since the yarn grippers in the current market are basically imported from abroad and the replacement cost is high, it is necessary to disassemble and maintain the yarn grippers every one to two years to remove the internal dust. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to address the deficiencies in the prior art and provide a yarn clamp for a spinning machine spindle and a working method thereof, which can avoid the entry of dust and cut the yarn more easily.

[0005] Technical solution: A yarn gripper for a spinning machine spindle, comprising an intermediate base, a knife seat coaxially fixed on the top of the intermediate base, a sliding sleeve coaxially sleeved outside the intermediate base and sliding up and down, an upper sealing ring, an upper locking ring, a spring, a ball bearing, a lower sealing ring, and a lower locking ring sequentially installed from top to bottom between the sliding sleeve and the intermediate base;

[0006] The spring presses the upper locking ring and the upper sealing ring against the top of the sliding sleeve; when the spinning frame spindle rotates, the ball is pressed against the inclined slideway of the inner wall of the sliding sleeve and generates centrifugal force, pushing the sliding sleeve to slide downward, so that the top surface of the sliding sleeve that is tightly fitted with the knife seat is separated from the knife seat.

[0007] Furthermore, the upper locking ring, the upper sealing ring, the lower sealing ring and the lower locking ring are fixed to the sliding sleeve via grooves reserved on the inner wall of the sliding sleeve.

[0008] Furthermore, the knife seat includes an upper knife seat, a lower knife seat and a three-dimensional blade fixed between the upper and lower knife seats and connected to the middle base. The cutting edge of the three-dimensional blade extends out of the knife seat in a claw shape, and the cutting edge is inclined downward at 110 degrees to the plane.

[0009] Furthermore, the top surface of the sliding sleeve has teeth grooves evenly distributed in the circumference for clamping the yarn with the knife seat, and the teeth grooves include triangular teeth grooves and trapezoidal teeth grooves arranged at intervals, and the height of the trapezoidal teeth grooves is greater than the height of the triangular teeth grooves.

[0010] Furthermore, the intermediate base is provided with a shoulder for compressing the spring in the upper part of the sliding sleeve, and the top end of the ball abuts against the lower surface of the shoulder.

[0011] Furthermore, a plurality of inclined slideways are evenly distributed around the inner wall of the sliding sleeve, and a ball is correspondingly arranged in each inclined slideway.

[0012] Furthermore, the inclined slide includes a first slide and a second slide connected up and down and expanding outward from bottom to top as a whole, and the inclination formed by the first slide and the horizontal plane is smaller than the inclination formed by the second slide and the horizontal plane.

[0013] Furthermore, it also includes a base that is sleeved and fixed at the lower part of the middle base, and the lower sealing ring and the lower locking ring are accommodated in the space between the sliding sleeve and the base. The bottom end of the outer periphery of the base has a protruding first shoulder and a second shoulder. The lower sealing ring and the lower locking ring move downward with the sliding sleeve until the lower locking ring abuts against the first shoulder, and the bottom end of the sliding sleeve abuts against the second shoulder.

[0014] A working method for a yarn clamp of a spinning frame spindle. When the spinning frame spindle rotates, under the action of centrifugal force, a ball moves obliquely upward along an inclined slideway, pushing a sliding sleeve downward to separate the sliding sleeve from a knife seat and open the yarn clamp. Under the influence of different rotation speeds, the opening and closing of the yarn clamp causes the tooth grooves between the sliding sleeve and the knife seat to engage or separate, thereby achieving the effect of clamping or releasing the yarn. During the opening and closing process of the yarn clamp, upper and lower sealing rings follow the sliding sleeve to slide back and forth along an intermediate base to prevent dust from entering the yarn clamp. When the tube is pulled out, the three-dimensional blade in the knife seat cuts the yarn on the tube, and the remaining yarn will not be taken out by the tube pulling.

[0015] Furthermore, when the spindle makes accelerated rotational motion, the ball is acted upon by the centrifugal force and tends to move outward. The ball is constrained by the second slide of the sleeve and slides obliquely upward along the second slide. Since the second slide is steeper, a rotation speed greater than 8000rmp is required to overcome the elastic force of the spring in order to open the yarn clamp. When the rotation speed continues to increase, the ball eventually enters the first slide and fits with the inner wall of the sleeve to form a limit position. When the spindle rotation speed decreases, the centrifugal force on the ball decreases, and the ball leaves the first slide, enters the second slide and slides obliquely downward back to its original position. At this time, the spring contracts upward and the first slide is flat. When the rotation speed is less than 2500rmp, the centrifugal force decreases, thereby closing the yarn clamp.

[0016] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0017] 1. The present invention installs upper and lower sealing rings in the sliding sleeve of the yarn gripper, and locks and fixes them with upper and lower locking rings respectively to play a sealing role; in the process of opening and closing the yarn gripper, the upper and lower sealing rings follow the sliding sleeve to slide up and down, and always keep the seal during the sliding process to prevent dust from entering the yarn gripper during use; on the basis of ensuring the sealing performance, the gap between the upper sealing ring and the middle base, and the gap between the lower sealing ring and the base eliminate the influence on the rotation speed during the opening and closing of the yarn gripper, and also prolong the service life;

[0018] 2. Compared with the flat circular three-dimensional blade, the three-dimensional blade used in the present invention can contact the edge of the three-dimensional blade when the yarn is not fully tightened during the colony extraction, which is more conducive to cutting the yarn. Even if it encounters coarse yarn or nylon yarn, it can be easily cut after being fully tightened;

[0019] 3. The present invention has a simple structure, is easy to install, does not require maintenance in the later stage, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the yarn gripper of the present invention;

[0021] Figure 2 It is a structural sectional view of the yarn gripper of the present invention;

[0022] Figure 3 Structural cross-section view of the yarn gripper when it is opened;

[0023] Figure 4 yes Figure 2 A partial enlarged view of part A;

[0024] Figure 5 It is a three-dimensional structural diagram of the lower slide sleeve;

[0025] Figure 6It is a schematic diagram of the three-dimensional structure of the upper sleeve. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0027] A yarn clamp for a spinning frame spindle, such as Figure 1 , 2 As shown, it includes an upper knife seat 1, a three-dimensional blade 2, a lower knife seat 3, an upper sliding sleeve 4, a lower sliding sleeve 5, an intermediate base 6, a ball 7, a base 8, a lower locking ring 9, a lower sealing ring 10, a spring 11, an upper locking ring 12, and an upper sealing ring 13. Among them, the materials of the upper knife seat 1, the lower knife seat 3, the upper sliding sleeve 4, the lower sliding sleeve 5, the intermediate base 6, the base 8, the lower locking ring 9, and the upper locking ring 12 are all hard engineering plastics with smooth surfaces. The material of the ball 7 is hardened high-carbon steel with a smooth surface.

[0028] The knife seat includes an upper knife seat 1, a lower knife seat 3, and a three-dimensional blade 2 fixed between the upper and lower knife seats by ultrasonic welding. The three-dimensional blade 2 is connected to the middle base 6, and the cutting edge of the three-dimensional blade 2 extends out of the knife seat in a claw shape. The cutting edge is inclined downward at 110 degrees to the plane, and the cutting edge length is 1.2 mm. Figure 6 As shown, the top surface of the upper sleeve 4 has teeth grooves evenly distributed in the circumferential direction, which clamp the yarn when meshing with the knife seat. The teeth grooves include triangular teeth grooves and trapezoidal teeth grooves alternately arranged at intervals. The height of the trapezoidal teeth grooves is 0.4 mm higher than that of the triangular teeth grooves, and the surface contact is increased, which is more conducive to clamping the yarn when the yarn clamp is closed.

[0029] The upper sleeve 4 and the lower sleeve 5 are fixedly connected up and down, the knife seat is coaxially fixed on the top of the middle base 6, and the upper sleeve 4 and the lower sleeve 5 are coaxially sleeved on the outer periphery of the middle base 6 and slide up and down. An upper sealing ring 13, an upper locking ring 12 and a spring 11 are arranged between the upper sleeve 4 and the middle base 6, and a ball 7, a lower sealing ring 10 and a lower locking ring 9 are arranged between the lower sleeve 5 and the middle base 6. The upper locking ring 12, the upper sealing ring 13, the lower sealing ring 10 and the lower locking ring 9 are always kept in a fixed position with the sleeve through the slot reserved on the inner wall of the sleeve, and the spring 11 presses the upper locking ring 12 and the upper sealing ring 13 on the top of the upper sleeve 4. Under the action of the spring 11, the free state of the yarn gripper is a closed state, and the top surface of the upper sleeve 4 fits with the knife seat.

[0030] The middle part of the intermediate base 6 is provided with a protruding shoulder, which compresses the spring 11 in the upper part of the lower sleeve 5, and the top of the ball 7 abuts against the lower surface of the shoulder. The base 8 is coaxially fixed to the bottom of the intermediate base 6, the lower sealing ring 10 and the lower locking ring 9 are accommodated in the space between the lower sleeve 5 and the base 8, and the ball 7 is accommodated in the space between the inclined slide 14 on the inner wall of the lower sleeve 5 and the intermediate base 6, and the bottom surface of the ball 7 rests on the top surface of the base 8.

[0031] like Figure 5 As shown, there are 12 evenly distributed inclined slideways 14 on the inner wall of the lower sleeve 5, and each inclined slideway is provided with a corresponding ball 7. The inclined slideway 14 includes a first slideway 141 and a second slideway 142 connected up and down and expanding outward from bottom to top as a whole, and the inclination formed by the first slideway 141 and the horizontal plane is less than the inclination formed by the second slideway 142 and the horizontal plane.

[0032] The base 8 has a first shoulder and a second shoulder protruding from its periphery, and the lower sealing ring 10 and the lower locking ring 9 follow the sliding sleeve to move downward until the lower locking ring 9 abuts against the first shoulder, and the bottom end of the sliding sleeve abuts against the second shoulder. The upper sealing ring 13 and the lower sealing ring 10 play a sealing role in the entire working state of the yarn gripper, preventing dust from entering the yarn gripper during the process and affecting the opening and closing state.

[0033] The working principle of this embodiment: the yarn clamp is installed on the spindle. When the spindle makes an accelerated rotational motion, the ball 7 is acted upon by the centrifugal force and tends to move outward. The ball 7 is constrained by the inclined slide 14 on the inner wall of the lower sleeve 5 and slides obliquely upward along the inclined slide 14. When the centrifugal force reaches a certain level, the vertical component of the ball 7 sliding obliquely downward overcomes the elastic force of the spring 11, and pushes the lower sleeve 5 together with the lower sealing ring 10, the lower locking ring 9 and the upper sleeve 4 to move downward. When the bottom surface of the lower sleeve 5 contacts the second shoulder of the base 8 to generate a limit, the lower locking ring 9 simultaneously abuts against the first shoulder, and the lower sleeve 5 can no longer move downward. At this time, the tooth groove on the top surface of the upper sleeve 4 is no longer engaged with the groove of the lower knife seat 3, releasing the clamped yarn, and the remaining yarn is thrown away by the centrifugal force. Figure 3 shown.

[0034] When preparing to drop the yarn, the spindle speed decreases and the centrifugal force on the ball 7 decreases. When the downward vertical component of the centrifugal force of the ball 7 is less than the elastic force of the spring 11, the spring 11 contracts upward, driving the lower sliding sleeve 5 together with the lower sealing ring 10, the lower locking ring 9 and the upper sliding sleeve 4 to move upward, and the ball 7 slides back to its original position obliquely downward, and the teeth and grooves between the upper sliding sleeve 4 and the lower knife seat 3 are engaged, clamping the yarn embedded in the opening and retaining the yarn head.

[0035] When replacing the bobbin, after the bobbin is lifted, the yarn on the bobbin is stuck in the tooth groove between the upper sliding sleeve 4 and the lower knife seat 3 and contacts the three-dimensional blade 2. Under the action of the tension force, the three-dimensional blade 2 cuts the yarn to separate the bobbin yarn from the remaining yarn.

[0036] The working state of the yarn gripper is required to be closed when the speed is less than 2500rmp and open when the speed is greater than 8000rmp. In order to allow the yarn gripper to have a certain speed difference between the opening and closing actions and avoid the uniform speed movement of the yarn gripper when the spindle accelerates and decelerates, the ball inclined slideway on the lower sleeve 5 is designed into two sections, such as Figure 4 As shown, the second slide 142 is steeper. When the spindle makes an accelerated rotational motion, the ball 7 is acted upon by the centrifugal force and tends to move outward. The ball 7 is constrained by the second slide 142 on the lower sleeve 5 and slides obliquely upward along the second slide 142. Since the second slide 142 is steeper, a very high rotation speed greater than 8000 rpm is required to generate a large centrifugal force to overcome the elastic force of the spring 11 in order to open the yarn clamp. When the rotation speed continues to increase, the ball 7 eventually enters the first slide 141 and fits with the inner wall of the lower sleeve 5 to form a limit position; the first slide 141 is relatively flat. When the spindle rotation speed decreases, the centrifugal force on the ball 7 decreases, and the ball 7 leaves the first slide 141, enters the second slide 142 and slides obliquely downward back to its original position. At this time, the spring 11 contracts upward. Since the first slide 141 is relatively flat, a lower rotation speed less than 2500 rpm is required to reduce the centrifugal force, thereby closing the yarn clamp.

[0037] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A yarn gripper for a spinning frame spindle, characterized in that: It includes an intermediate base, a knife seat coaxially fixed on the top of the intermediate base, a sliding sleeve coaxially sleeved outside the intermediate base and sliding up and down, an upper sealing ring, an upper locking ring, a spring, a ball, a lower sealing ring, and a lower locking ring sequentially installed from top to bottom between the sliding sleeve and the intermediate base; The spring presses the upper locking ring and the upper sealing ring against the top of the sliding sleeve; when the spinning frame spindle rotates, the ball is pressed against the inclined slideway of the inner wall of the sliding sleeve and generates centrifugal force, pushing the sliding sleeve to slide downward, so that the top surface of the sliding sleeve that is tightly fitted with the knife seat is separated from the knife seat; The knife seat comprises an upper knife seat, a lower knife seat and a three-dimensional blade fixed between the upper knife seat and the lower knife seat and connected to the middle base. The cutting edge of the three-dimensional blade extends out of the knife seat in a claw shape, and the cutting edge is inclined downward and forms 110 degrees with the plane.

2. The yarn gripper for a spinning frame spindle according to claim 1, characterized in that: The upper locking ring, the upper sealing ring, the lower sealing ring and the lower locking ring are fixed to the sliding sleeve through the grooves reserved on the inner wall of the sliding sleeve.

3. The yarn gripper for a spinning frame spindle according to claim 1, characterized in that: The top surface of the sliding sleeve has teeth grooves evenly distributed in the circumference for clamping the yarn with the knife seat, and the teeth grooves include triangular teeth grooves and trapezoidal teeth grooves arranged at intervals, and the height of the trapezoidal teeth grooves is greater than the height of the triangular teeth grooves.

4. The yarn gripper for a spinning frame spindle according to claim 1, characterized in that: The middle base is provided with a shaft shoulder for compressing the spring in the upper part of the sliding sleeve, and the top end of the ball abuts against the lower surface of the shaft shoulder.

5. The yarn gripper for a spinning frame spindle according to claim 1, characterized in that: A plurality of inclined slideways are evenly distributed along the inner wall of the sliding sleeve, and a ball is correspondingly arranged in each inclined slideway.

6. The yarn gripper for a spinning frame spindle according to claim 1 or 5, characterized in that: The inclined slide includes a first slide and a second slide connected up and down and expanding outward from bottom to top as a whole. The inclination formed by the first slide and the horizontal plane is smaller than the inclination formed by the second slide and the horizontal plane.

7. The yarn gripper for a spinning frame spindle according to claim 1, characterized in that: It also includes a base which is sleeved and fixed on the lower part of the middle base, the lower sealing ring and the lower locking ring are accommodated in the space between the sliding sleeve and the base, the bottom end of the outer periphery of the base has a protruding first shoulder and a second shoulder, the lower sealing ring and the lower locking ring move downward with the sliding sleeve until the lower locking ring abuts against the first shoulder, and the bottom end of the sliding sleeve abuts against the second shoulder.

8. A working method for a yarn gripper of a spinning frame spindle, characterized in that: When the spindle of the spinning frame rotates, under the action of centrifugal force, the ball moves obliquely upward along the inclined slideway, pushing the sliding sleeve downward to separate the sliding sleeve from the knife seat and open the yarn clamp. Under the influence of different rotation speeds, the opening and closing of the yarn clamp causes the teeth between the sliding sleeve and the knife seat to engage or separate, thereby achieving the effect of clamping or releasing the yarn; during the opening and closing process of the yarn clamp, the upper and lower sealing rings follow the sliding sleeve to slide back and forth along the middle base to prevent dust from entering the yarn clamp; when the tube is pulled out, the three-dimensional blade in the knife seat cuts the yarn on the yarn tube, and the remaining yarn will not be brought out by the tube pulling.

9. The working method of the yarn gripper for the spinning frame spindle according to claim 8, characterized in that: When the spindle makes accelerated rotational motion, the ball is acted upon by the centrifugal force and tends to move outward. The ball is constrained by the second slideway of the sleeve and slides obliquely upward along the second slideway. Since the second slideway is steeper, a rotation speed greater than 8000rmp is required to overcome the elastic force of the spring in order to open the yarn clamp. When the rotation speed continues to increase, the ball eventually enters the first slideway and fits with the inner wall of the sleeve to form a limit position. When the spindle rotation speed decreases, the centrifugal force on the ball decreases, and the ball leaves the first slideway, enters the second slideway and slides obliquely downward back to its original position. At this time, the spring contracts upward and the first slideway is flat. When the rotation speed is less than 2500rmp, the centrifugal force decreases, thereby closing the yarn clamp.

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