Knitting machine with anti-drag reversing drive plate structure and lubricating method thereof

Abstract

The invention relates to the technical application field of knitting machines, in particular to a knitting machine with an anti-drag reversing drive plate structure and a lubricating method of the knitting machine. A built-in oil outlet cavity, a built-in steel ball and a compression spring are arranged on the inner side of an arc-shaped notch of the reversing drive plate mechanism, and an internal flow channel communicated with the oil outlet cavity is arranged in the reversing drive plate mechanism; an oil distribution plate is fixedly arranged on the inner side of an arc-shaped notch of the reversing drive plate mechanism, an oil distribution cavity is formed in the reversing drive plate mechanism in the arc-shaped direction, one end of the oil distribution cavity communicates with the oil outlet cavity, and a plurality of oil outlets are formed in the inner concave face of the oil distribution plate. The transmission mechanism comprises a transmission shaft and a straight spur gear, the upper end of the transmission shaft is clamped with the reversing drive plate mechanism, the transmission shaft penetrates through the reversing drive plate mechanism and the oil guide cavity, the lower end of the transmission shaft is connected with an external oil pipeline, an annular groove is formed in the periphery of the transmission shaft in the circumferential direction, and a through hole is formed in the area of the annular groove to form a shaft hole radial gap communicated with the internal flow channel. When the spindle and the reversing drive plate are in reversing contact, the oil injection system is triggered to work, and lubrication and resistance reduction of the spindle and the drive plate are achieved.

Description

Technical Field

[0001] The invention relates to the technical application field of braiding machines, in particular to a braiding machine with a drag-reducing reversing dial structure and a lubrication method thereof. Background Art

[0002] The working part of the spindle braiding machine is a fixed vertical table with "8"-shaped groove tracks that intersect and connect tangently. The spindle is installed in the groove and divided into two equal parts, which evenly intersect each other and move in opposite directions at the same speed. This cycle repeats itself, and the spindle is driven back and forth continuously, so that the yarn is woven onto the surface of the cable to form a braided layer. As a key component of the braiding machine, the reversing dial is responsible for controlling the movement direction of the braiding machine and realizing different braiding modes. Since the spindle itself has a certain mass, it will hit the dial when the dial is frequently reversed, resulting in a large impact. At the same time, the sliding friction between the upper and lower surfaces of the dial and the spindle will also cause wear and noise, which will greatly reduce the life of the braiding machine in the long run. Therefore, an efficient drag reduction structure and lubrication system are required to reduce friction and wear.

[0003] To solve the above problems, the inventors proposed a braiding machine and lubrication method containing a drag-reducing reversing dial structure. This method optimizes the reversing structure and method of the traditional braiding machine. In order to improve the smoothness of the spindle reversing, the traditional non-contacting reversing dials are changed to an upper and lower cross-contact type. In order to reduce the contact stress and friction wear during reversing, the upper, lower, left and right edge profiles of the traditional reversing dial are optimized, and different transition curves are introduced to improve the sharp edges. In order to improve the wear when the spindle contacts the dial and when reversing, a spring oil spray structure is added to the traditional reversing dial, which is activated every time the reversing occurs to form a lubricating oil film on the spindle and the reversing dial. Compared with traditional braiding machines, this method can greatly eliminate the impact stress, wear and noise during frequent reversing, and greatly extend the service life of the braiding machine. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a braiding machine with a drag-reducing reversing dial structure and a lubrication method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A braiding machine with a drag-reducing reversing dial structure comprises a base frame, a cover plate, a reversing dial mechanism, a transmission mechanism, a spindle seat, a spindle, a column, a vertical drive motor, a belt-out adjustment mechanism, and a speed-regulating motor; the cover plate is located on the base frame, a circular hole is opened in the center of the cover plate, a plurality of transmission mechanisms are arranged around the circular hole, each transmission mechanism is provided with a reversing dial mechanism, the vertical drive motor is mounted on the cover plate, and each transmission mechanism is driven to rotate by a gear; four arc-shaped notches are arranged at equal angles on the edge of each reversing dial mechanism for accommodating the spindle seat, the spindle is located on the spindle seat, and in a rotating state, the arc-shaped notches of two adjacent reversing dial mechanisms form a butt joint to transfer the spindle seat, and the rotation directions of the two adjacent reversing dial mechanisms are opposite; the column is mounted on the floor, the speed-regulating motor is mounted on the column, and the speed-regulating motor drives the belt-out adjustment mechanism to gather the braided rope belt;

[0007] The bottom of the reversing dial mechanism is an oil guide cavity connected and clamped with the transmission mechanism. The inner side of the arc-shaped notch of the reversing dial mechanism is provided with a built-in oil outlet cavity, the oil outlet cavity is built with a steel ball and a compression spring, and the reversing dial mechanism is built with an internal flow channel connected to the oil outlet cavity;

[0008] An oil separation plate is fixedly arranged on the inner side of the arc-shaped notch of the reversing dial mechanism. The oil separation plate is an arc-shaped structure adapted to the arc-shaped notch. An oil separation chamber is built-in along the arc-shaped direction. One end of the oil separation chamber is connected with the oil outlet chamber. A plurality of oil outlets are opened on the inner concave surface of the oil separation plate. The oil separation chamber is connected with each oil outlet. The oil separation plate is also provided with a pin shaft hole. The oil separation plate at the pin shaft hole is sealed in the oil outlet chamber. A baffle plate is arranged on the inner side of the pin shaft hole to abut between the steel ball and the pin shaft hole. A pin shaft penetrating the pin shaft hole is arranged on the baffle plate. When the steel ball is pushed by the compression spring to push the baffle plate, part of the pin shaft is outside the pin shaft hole, and the baffle plate is sealed in the oil separation chamber.

[0009] The transmission mechanism includes a transmission shaft and a spur gear. The spur gear is sleeved on the transmission shaft and meshes with the vertical drive motor. The upper end of the transmission shaft is clamped with the oil guide chamber, and the transmission shaft passes through the reversing dial mechanism and the oil guide chamber. The transmission shaft has a hollow shaft hole, and its lower end is connected to an external oil pipeline. An annular groove is opened in the outer circumference of the transmission shaft near the upper end, and a through hole connected to the shaft hole is opened in the annular groove area. A radial gap of the shaft hole is formed between the annular groove and the reversing dial mechanism and the oil guide chamber, and the radial gap of the shaft hole is connected to the internal flow channel.

[0010] As a further preferred embodiment, the reversing dial mechanism is divided into an upper reversing dial and a lower reversing dial, the lower reversing dials are arranged alternately, the circumferential edge of the upper reversing dial is provided with an upper edge contour, the circumferential edge of the lower reversing dial is provided with a lower edge contour, and the upper edge contour of the upper reversing dial overlaps the lower edge contour of the lower reversing dial.

[0011] As a further preferred solution, the upper edge profile and the lower edge profile have the same structure, one corner of the cross section is a right angle, and the other corner is an arc angle, and the right angle sides of the upper edge profile and the lower edge profile overlap each other;

[0012] The arc vertices of the upper reversing dial (3) and the lower reversing dial (5) are selected as point O, the vertical direction is OA, the horizontal direction is OB, and the x-axis of the coordinate system is established by rotating 45° clockwise with OB as the reference. The y-axis of the coordinate system is established at O' not far from point O; the parameter equations of the upper and lower edge contours are: Let the length of OO' be c, then the straight line formulas of OA and OB are y=xc and y=-x+c respectively. Solving the above formulas together, we can get the coordinates of the tangent point (x0, y0) (where ); the values ​​of a, b, and c are determined according to the thickness of the reversing dial and must meet a 2 -b 2 =c 2 Two conditions.

[0013] As a further preferred solution, the contour of the arc-shaped notch edge of the upper reversing dial and the lower reversing dial is a quadratic Bezier curve; calculation of the contour: select the geometric center of the upper reversing dial and the lower reversing dial as point O to establish a coordinate system, determine the center position of the spindle seat after reversing as Q0 according to the track, draw a line parallel to the y-axis through Q0 to intersect the edge of the spindle seat at point Q1, draw a transition straight line segment parallel to the x-axis, the length is Q1P0, the coordinates of point P0 are (x0, y0), extend Q1P0 to intersect the edge of the upper reversing dial and the lower reversing dial as P1 (x1, y0), select point P2 (x2, y2) on the edge contour as the end point of the Bezier curve contour, the position of point P2 is selected according to needs, and needs to satisfy Where c is the diameter of the reversing dial, d is half the center distance between adjacent reversing dials; with P0, P1, and P2 as control points, the path of the curve is given by the function B(t) of the given point, and the formula is B(t) = (1-t) 2 P0+2t(t-1)P1+t 2 P2, where t∈[0,1].

[0014] As a further preferred solution, an upper oil seal and a lower oil seal are respectively provided at the upper end and the lower end of the radial gap of the shaft hole for sealing the radial gap of the shaft hole.

[0015] As a further preferred solution, a flange is provided at the lower position of the transmission shaft, a lower end face bearing is provided between the flange and the spur gear, the top of the transmission shaft is an upper threaded portion with a diameter smaller than the transmission shaft, the upper threaded portion has a fastening nut, and an upper end face bearing is provided between the fastening nut and the top of the transmission shaft.

[0016] As a further preferred solution, the shaft hole at the lower end of the transmission shaft is built with an internal thread, and the transmission shaft is connected to an external oil pipeline through the internal thread.

[0017] A lubrication method including a drag-reducing reversing dial structure comprises the following steps:

[0018] Step 1: The external oil pipeline flushes lubricating oil into the shaft hole of the transmission shaft, and the lubricating oil flows into the through hole, the radial clearance of the shaft hole, the internal flow channel, and the oil outlet cavity in sequence;

[0019] Step 2: When the spindle seat changes direction at different reversing dial mechanisms, it enters the arc-shaped gap and compresses the push rod. The push rod pushes the steel ball through the baffle plate, and then the steel ball moves to compress the compression spring. At this time, the baffle plate loses its blockage of the oil separation chamber, and the oil in the oil outlet chamber flows into the oil separation chamber of the oil separation plate, and then flows out from each oil outlet to lubricate the spindle seat;

[0020] Step 3: After the spindle seat changes direction, it leaves the arc-shaped gap, and the compression push rod is no longer squeezed, so the compression spring resets and moves the steel ball to make the compression push rod return to the initial position. The baffle re-blocks the oil separation chamber, the flow channel is closed, the oil no longer enters the oil separation chamber, and the oil outlets of the oil separation plate no longer discharge oil.

[0021] Beneficial Effects

[0022] 1. The two adjacent reversing dials adopt the upper and lower cross contact type, which can provide effective support for the spindle when the spindle switches between the two dials, thereby reducing the spindle shaking, vibration noise and wear.

[0023] 2. The upper and lower edge contours of the reversing dial are hyperbolic, and a calculation method for the upper and lower edge contours of the reversing dial is given. Compared with the original dial with a right-angle contour, the present invention can effectively reduce the impact and collision caused by the shaking of the spindle when the spindle switches between dials, and effectively reduce vibration noise and impact wear.

[0024] 3. The edge contour of the spindle bayonet of the reversing dial is a quadratic Bezier curve. A calculation method for the edge contour of the spindle bayonet of the reversing dial is given, which can effectively reduce the impact and noise during power transmission.

[0025] 4. The reversing system is equipped with a spring oil spray structure, which triggers the oil spray system to work when the spindle and the reversing dial make reversing contact, and maintains a high-pressure oil film between the contact surface of the spindle and the dial, realizing floating support of the dial on the spindle, reducing friction resistance, and effectively extending the service life of the spindle and the dial. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the overall structural diagram of the present invention;

[0027] Figure 2It is a schematic diagram of the contact mode of adjacent reversing dials;

[0028] Figure 3 (a) is a main structural diagram of the upper reversing dial mechanism of the present invention;

[0029] Figure 3 (b) is an exploded structural diagram of the upper reversing dial mechanism of the present invention;

[0030] Figure 3 (c) is a partial cross-sectional view of the spring lubrication mechanism of the present invention;

[0031] Figure 4 (a) is an exploded structural diagram of the transmission mechanism of the present invention;

[0032] Figure 4 (b) is a comprehensive cross-sectional view of the transmission mechanism of the present invention;

[0033] Figure 5 (a) is a main structural diagram of the oil separation plate of the present invention;

[0034] Figure 5 (b) is a comprehensive cross-sectional view of the oil separator of the present invention;

[0035] Figure 6 Draw schematics for hyperbolic contours;

[0036] Figure 7 Draw schematics for Bezier curve contours;

[0037] Figure 8 It is a schematic diagram of the installation angle of the upper reversing dial and the lower reversing dial;

[0038] Fig. 9 Schematic diagram of the internal flow channel structure;

[0039] Among them, 1-base frame, 2-cover plate, 3-upper reversing dial, 301-oil guide chamber, 302-radial sealing screw, 303-axial sealing screw, 304-oil distribution plate, 305-compression push rod, 306-steel ball, 307-compression spring, 308-fastening screw, 4-transmission mechanism, 401-transmission shaft, 402-lower end face bearing, 403-lower oil seal, 404-spur gear, 405-upper oil seal, 406-upper end face bearing, 407-fastening nut, 408-internal thread, 409-shaft hole, 4010-through hole, 4011-shaft hole radial clearance, 4012-internal flow channel, 5-lower reversing dial, 6-spindle seat, 7-spindle, 8-column, 9-vertical drive motor, 10-belt adjustment mechanism, 11-speed regulating motor. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] A braiding machine with a drag-reducing reversing dial structure and a lubrication method, specifically comprising a base frame 1, a cover plate 2, an upper reversing dial 3, a transmission mechanism 4, a lower reversing dial 5, a spindle seat 6, a spindle 7, a column 8, a vertical drive motor 9, a belt output adjustment mechanism 10, and a speed regulating motor 11.

[0042] The base frame 1 and the cover plate 2 are both provided with threaded holes and connected by screws. The center of the cover plate 2 is provided with a circular hole for conveying the rope from the bottom to the top for yarn weaving. Eight axial holes are provided around the circular hole for installing the upper reversing dial 3 and the lower reversing dial 5. The upper reversing dial 3 and the lower reversing dial 5 are provided with four circular notches at equal angles for placing the spindle seat 6. The circular notch of the upper reversing dial 3 matches the circular notch of the adjacent lower reversing dial 5 when rotating. The two rotate in opposite directions. The installation method is as follows: Figure 2 As shown, the upper and lower parts cross-contact and are performed alternately in sequence. The spindle base 6 and the spindle 7 are both provided with threaded holes and connected by screws. The vertical drive motor 9 is installed in the mounting hole reserved on the cover plate 2 by bolt connection, and drives the transmission mechanism 4 through a series of gears. The transmission mechanism 4 drives the upper reversing dial 3 and the lower reversing dial 5 through the shaft hole to reverse the spindle base 6, and the spindle base 6 performs periodic motion along the track on the cover plate 2. The column 8 is installed in the mounting hole reserved on the floor 2 by bolt connection, and the speed regulating motor 11 is installed on the column 8 by bolt connection. The speed regulating motor 11 drives the belt adjustment mechanism 10 by chain drive to tighten the woven rope belt.

[0043] The reversing dial mechanism (upper reversing dial 3 or lower reversing dial 5) is composed of an oil guide chamber 301, a radial sealing screw 302, an axial sealing screw 303, an oil distribution plate 304, a compression push rod 305, a steel ball 306, a compression spring 307, and a fastening screw 308. Since the internal flow channel of the reversing dial mechanism is difficult to process when it is manufactured, holes can only be drilled from the edge to the inside, and radial sealing screws 302 and axial sealing screws 303 are used to seal and maintain the internal pressure.

[0044] The radial sealing screw 302 and the axial sealing screw 303 are connected to the threaded hole of the oil guide cavity 301 by screw connection to achieve sealing of the internal flow channel 4012. Figure 5As shown in (a), threaded holes are opened on both sides of the oil separator 304, and screw connection is performed with the oil guide cavity 301 through the tightening screws 308. The surface of the oil separator 304 is provided with circular holes arranged in an array to realize the diversion of the oil, and the oil flows out from the oil holes to lubricate the spindle seat 6. The installation method of the compression push rod 305, the steel ball 306, and the compression spring 307 is as follows: Figure 3 As shown in (c), when the spindle seat 6 is reversed, the compression push rod 305 is squeezed, and then the steel ball 306 moves to compress the compression spring 307, the flow channel is opened, and the oil flows into the oil separation plate 304 from the internal flow channel. After the spindle seat 6 is reversed, the compression push rod 305 is no longer squeezed, and then the compression spring 307 resets and moves the steel ball 306 to cause the compression push rod 305 to return to the initial position, the flow channel is closed, and the oil no longer enters the oil separation plate 304.

[0045] The upper edge profile of the upper reversing dial 3 (the lower edge profile of the lower reversing dial 5) is a hyperbola, that is, a longitudinal edge, which can effectively reduce the contact area between the reversing dial and the spindle seat 6, and greatly reduce the contact stress and friction wear generated during reversing. The schematic diagram of the calculation principle of the profile is shown in the figure Figure 6 As shown, the upper vertex of the upper reversing dial 3 (the lower vertex of the lower reversing dial 5) is selected as point O, the vertical direction is OA, the horizontal direction is OB, and the x-axis of the coordinate system is established by rotating 45° clockwise with OB as the reference, and the y-axis of the coordinate system is established at O' not far from point O. The parameter equations of the upper and lower edge contours are: Let the length of OO' be c, then the straight line formulas of OA and OB are y=xc and y=-x+c respectively. Solving the above formulas together, we can get the coordinates of the tangent point (x0, y0) (where ). The values ​​of a, b, and c are determined by the thickness of the reversing dial and must meet a 2 -b 2 =c 2 Two conditions.

[0046] The edge profile of the bayonet of the upper reversing dial 3 (lower reversing dial 5) is a quadratic Bezier curve, that is, a horizontal opening edge. The spindle seat 6 contacts the curve segment during reversing, which can effectively reduce the impact and noise generated during reversing. The schematic diagram of the calculation principle of the profile is shown in Figure 7 As shown, the geometric center of the upper reversing dial 3 (lower reversing dial 5) is selected as point O to establish a coordinate system. According to the track, the center position of the spindle seat 6 after reversing is determined to be Q0. A line parallel to the y-axis is drawn through Q0 to intersect the edge of the spindle seat 6 at point Q1. A transition straight line segment parallel to the x-axis is drawn with a length of Q1P0. The coordinates of point P0 are (x0, y0). The edge of Q1P0 intersecting the oil guide cavity 301 is extended to P1 (x1, y0). Point P2 (x2, y2) is selected on the edge contour as the end point of the Bezier curve contour. The position of point P2 is selected as required and needs to meet Where c is the diameter of the reversing dial, and d is half the center distance between adjacent reversing dials. With P0, P1, and P2 as control points, the path of the curve is given by the function B(t) of the given point, and the formula is B(t) = (1-t) 2 P0+2t(t-1)P1+t 2 P2, where t∈[0,1].

[0047] Transmission mechanism 4 Figure 4 (a) and Figure 4 As shown in (b), it is composed of a transmission shaft 401, a lower end face bearing 402, a lower oil seal 403, a spur gear 404, an upper oil seal 405, an upper end face bearing 406, and a fastening nut 407. The lower end face bearing 402 is installed on the disc of the transmission shaft 401, and the spur gear 404 and the transmission shaft 401 are matched with the shaft hole to drive the upper reversing dial 3 to rotate. The lower oil seal 403 and the upper oil seal 405 are matched with the shaft hole of the transmission shaft 401 to achieve the sealing of the oil in the radial gap 4011 of the shaft hole. The internal thread 408 of the transmission shaft 401 is connected to the oil pipeline of the external pump station to supply oil to the entire transmission system. The oil flows through the shaft hole 409 to the through hole 4010 for diversion and then flows into the radial gap 4011 of the shaft hole, and then flows into the internal flow channel 4012 to achieve the oil supply to the spring lubrication mechanism.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A braiding machine with a drag-reducing reversing dial structure, comprising a base frame (1), a cover plate (2), a reversing dial mechanism, a transmission mechanism (4), a spindle seat (6), a spindle (7), a column (8), a vertical drive motor (9), a belt-discharging adjustment mechanism (10), and a speed regulating motor (11); the cover plate (2) is located on the base frame (1), a circular hole is opened in the center of the cover plate (2), a plurality of transmission mechanisms (4) are arranged around the circular hole, each transmission mechanism (4) is provided with a reversing dial mechanism, and the vertical drive motor (9) is installed on the cover plate (2). Each transmission mechanism (4) is driven to rotate by gears; four arc-shaped notches are provided at equal angles on the edge of each reversing dial mechanism for placing a spindle seat (6); a spindle (7) is located on the spindle seat (6); in a rotating state, the arc-shaped notches of two adjacent reversing dial mechanisms are connected to each other to transfer the spindle seat (6); and the rotation directions of the two adjacent reversing dial mechanisms are opposite; a column (8) is mounted on the cover plate (2); a speed regulating motor (11) is mounted on the column (8); and the speed regulating motor (11) drives a belt-out adjustment mechanism (10) to gather the braided rope belt; Features: The bottom of the reversing dial mechanism is an oil guide cavity (301) connected and clamped with the transmission mechanism (4); the inner side of the arc-shaped notch of the reversing dial mechanism is provided with a built-in oil outlet cavity, the oil outlet cavity is provided with a steel ball (306) and a compression spring (307); the reversing dial mechanism is provided with an internal flow channel (4012) connected with the oil outlet cavity; An oil separation plate (304) is fixedly arranged on the inner side of the arc-shaped notch of the reversing dial mechanism. The oil separation plate (304) is an arc-shaped structure adapted to the arc-shaped notch. An oil separation chamber is built in along the arc-shaped direction. One end of the oil separation chamber is connected to the oil outlet chamber. A plurality of oil outlets are provided on the inner concave surface of the oil separation plate (304). The oil separation chamber is connected to each of the oil outlets. A pin shaft hole is also arranged on the oil separation plate (304). The oil separation plate (304) at the pin shaft hole is sealed in the oil outlet chamber. A baffle plate is arranged on the inner side of the pin shaft hole to abut between the steel ball (306) and the pin shaft hole. A pin shaft penetrating the pin shaft hole is arranged on the baffle plate. When the steel ball (306) is pushed by the compression spring (307), part of the pin shaft is outside the pin shaft hole, and the baffle plate is sealed in the oil separation chamber. The transmission mechanism (4) comprises a transmission shaft (401) and a spur gear (404), wherein the spur gear (404) is sleeved on the transmission shaft (401) and meshes with the vertical drive motor (9), wherein the upper end of the transmission shaft (401) is engaged with the oil guide chamber (301), and the transmission shaft (401) passes through the reversing dial mechanism and the oil guide chamber (301); a hollow shaft hole (409) is provided in the transmission shaft (401), and the lower end of the shaft hole (409) is connected to an external oil pipeline; an annular groove is provided in the outer circumference of the transmission shaft (401) near the upper end, and a through hole (4010) communicating with the shaft hole (409) is provided in the annular groove region; a shaft hole radial gap (4011) is formed between the annular groove and the reversing dial mechanism and the oil guide chamber (301), and the shaft hole radial gap (4011) is communicated with an internal flow channel (4012).

2. A braiding machine with a drag-reducing reversing dial structure according to claim 1, characterized in that: The reversing dial mechanism is divided into an upper reversing dial (3) and a lower reversing dial (5), the lower reversing dials (5) are arranged alternately, the circumferential edge of the upper reversing dial (3) is provided with an upper edge contour, the circumferential edge of the lower reversing dial (5) is provided with a lower edge contour, and the upper edge contour of the upper reversing dial (3) and the lower edge contour of the lower reversing dial (5) overlap each other.

3. A braiding machine with a drag-reducing reversing dial structure according to claim 2, characterized in that: The upper edge profile and the lower edge profile have the same structure, one corner of the cross section is a right angle, the other corner is an arc angle, and the right angle sides of the upper edge profile and the lower edge profile overlap each other; The arc vertices of the upper reversing dial (3) and the lower reversing dial (5) are selected as point O, the vertical direction is OA, the horizontal direction is OB, and the x-axis of the coordinate system is established by rotating 45° clockwise with OB as the reference. The y-axis of the coordinate system is established at O' not far from point O; the parameter equations of the upper and lower edge contours are: Let the length of OO' be c, then the straight line formulas of OA and OB are y=xc and y=-x+c respectively. Solving the above formulas together, we can get the coordinates of the tangent point (x0, y0) (where ); the values ​​of a, b, and c are determined according to the thickness of the reversing dial and must meet a 2 -b 2 =c 2 Two conditions.

4. A braiding machine with a drag-reducing reversing dial structure according to claim 3, characterized in that: The contour of the arc-shaped notch edge of the upper reversing dial (3) and the lower reversing dial (5) is a quadratic Bezier curve; the contour is calculated by selecting the geometric center of the upper reversing dial (3) and the lower reversing dial (5) as the O point to establish a coordinate system, determining the center position of the spindle seat (6) after reversing as Q0 according to the track, drawing a line parallel to the y-axis through Q0 to intersect the edge of the spindle seat (6) at point Q1, drawing a transition straight line segment parallel to the x-axis, the length of which is Q1P0, the coordinates of point P0 are (x0, y0), extending Q1P0 to intersect the edge of the upper reversing dial (3) and the lower reversing dial (5) as P1 (x1, y0), selecting point P2 (x2, y2) on the edge contour as the end point of the Bezier curve contour, and the position of point P2 is selected according to needs, and needs to meet Where c is the diameter of the reversing dial, d is half the center distance between adjacent reversing dials; with P0, P1, and P2 as control points, the path of the curve is given by the function B(t) of the given point, and the formula is B(t) = (1-t) 2 P0+2t(t-1)P1+t 2 P2, where t∈[0,1].

5. A braiding machine with a drag-reducing reversing dial structure according to claim 1, characterized in that: An upper oil seal (405) and a lower oil seal (403) are respectively provided at the upper end and the lower end of the shaft hole radial gap (4011) for sealing the shaft hole radial gap (4011).

6. A braiding machine with a drag-reducing reversing dial structure according to claim 1, characterized in that: A flange is provided at the lower part of the transmission shaft (401), a lower end face bearing (402) is provided between the flange and the spur gear (404), the top of the transmission shaft (401) is an upper threaded portion with a diameter smaller than that of the transmission shaft (401), the upper threaded portion has a fastening nut (407), and an upper end face bearing (406) is provided between the fastening nut (407) and the top of the transmission shaft (401).

7. A braiding machine with a drag-reducing reversing dial structure according to claim 1, characterized in that: The shaft hole (409) at the lower end of the transmission shaft (401) is internally provided with an internal thread (408), and the transmission shaft (401) is connected to an external oil pipeline via the internal thread (408).

8. A lubrication method including a drag-reducing reversing dial structure according to claim 1, characterized in that: The following steps are involved: Step 1: Lubricating oil is flushed into the shaft hole (409) of the transmission shaft (401) through the external oil pipeline, and the lubricating oil flows into the through hole (4010), the shaft hole radial gap (4011), the internal flow channel (4012), and the oil outlet cavity in sequence; Step 2: When the ingot seat (6) is reversing at different reversing dial mechanisms, it enters the arc-shaped gap and compresses the push rod (305). The push rod (305) pushes the steel ball (306) through the baffle plate, and then the steel ball (306) moves to compress the compression spring (307). At this time, the baffle plate loses its blocking effect on the oil separation chamber, and the oil in the oil outlet chamber flows into the oil separation chamber of the oil separation plate (304), and then flows out from each oil outlet, thereby lubricating the ingot seat (6); Step 3: After the spindle seat (6) changes direction, it leaves the arc-shaped gap, and the compression push rod (305) is no longer squeezed, so that the compression spring (307) resets the moving steel ball (306) to make the compression push rod (305) return to the initial position, and the baffle plate re-blocks the oil separation chamber, the flow channel is closed, the oil no longer enters the oil separation chamber, and the oil outlets of the oil separation plate (304) no longer discharge oil.

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