A high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine

Abstract

The present invention relates to the field of textile machinery technology, and more particularly to a high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine. The present invention relates to a high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine, comprising a screw adjustment device and a limit device. The screw adjustment device comprises a base, wherein a screw and a sun gear are provided within the base, wherein the sun gear is located on one side of the screw, and wherein a planetary gear is provided in conjunction with the sun gear. The planetary gear and the screw are provided in conjunction with each other, and an internal gear is provided on the base, wherein the planetary gear is located between the internal gear and the sun gear.

Description

Technical Field

[0001] The invention relates to the technical field of textile machinery, and in particular to a high-precision adjustment device for adjusting the alignment of upper and lower triangles of a circular knitting machine. Background Art

[0002] The upper and lower knitting triangles of a double-sided circular knitting machine are arranged at right angles, acting on the upper and lower needles respectively. Depending on the relative positions of the yarn bending points of the upper and lower triangles, the knitting can be adjusted to three states: synchronous, advanced, and lagging. In actual production, the proper alignment of the upper and lower triangles is crucial, as it significantly impacts product quality and is a crucial adjustment parameter.

[0003] The lower triangle is connected to the frame and its axial position is fixed. Therefore, to adjust the relative position of the upper and lower triangles, simply adjust the position of the upper triangle. The upper triangle is fixed to the sleeve, so adjusting the sleeve position can change the position of the upper triangle. The sleeve position is generally adjusted using the trunk assembly. Adjusting screws A and B, rotating the sleeve, changes the relative position of the upper and lower triangles.

[0004] The defects of the existing technology are as follows: 1. The adjustment method of the existing technology is very cumbersome. It is necessary to first loosen the locking nuts at A and B, then adjust the set screws at A and B, and finally tighten the nuts. Since the position of the sleeve is adjusted by moving the screws in and out, inexperienced workers need to make multiple adjustments before they are in place. 2. The existing technology requires an external dial indicator to achieve precise adjustment. 3. Since the existing technology is a shaft sleeve structure, the shaft sleeves need to be able to rotate, so there is a gap, which affects the generation of stop marks. 4. Since the existing technology has many parts that need to be adjusted and they are all in the same position, it is not easy to transform into automatic control. Summary of the Invention

[0005] The present invention aims to provide a high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine. The specific scheme is as follows:

[0006] A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine includes a spiral adjustment device and a limit device. The spiral adjustment device includes a base, a screw and a sun gear are provided in the base, the sun gear is located on one side of the screw, the sun gear is cooperated with a planetary gear, the planetary gear and the screw are cooperated, an internal gear is provided on the base, and the planetary gear is located between the internal gear and the sun gear.

[0007] The base is provided with a screw bushing and a planetary carrier bushing, the screw passes through the screw bushing and the planetary carrier bushing, the screw bushing is provided with a thrust needle bearing, and one end of the screw is provided with a round nut to lock the screw.

[0008] A first needle roller bearing is provided between the planetary gear and the screw, and a second needle roller bearing is provided between the shaft end of the sun gear and the screw.

[0009] One end of the base includes an end cover, the end cover is provided with a dial, and the dial is connected to the sun gear, the sun gear passes through the end cover, the end cover includes a zero mark, and the base is inlaid with a ruler, which is a transparent ruler.

[0010] The sun gear includes a groove and an external hexagon. An O-ring is arranged in the groove, and the O-ring is located between the sun gear and the end cover.

[0011] The screw is provided with a nut, and the nut and the screw constitute a spiral transmission. The base is provided with a sliding groove, and the nut slides in the movable groove. The nut is provided with a cutting groove, and a screw is provided at the cutting groove. The base is provided with a thread gap adjustment hole, and the thread gap adjustment hole is arranged in cooperation with the screw.

[0012] The limiting device comprises a limiting seat, and a left stopper and a right stopper are provided on the limiting seat, and the left stopper and the right stopper are clamping nuts.

[0013] The limit seat is provided with a row of holes on the side close to the left stopper, and a first needle roller is arranged in the row of holes. The left stopper is provided with a row of holes on the side close to the nut, and a second needle roller is arranged in the row of holes. The right stopper is provided with a row of holes on the side close to the nut, and a third needle roller is arranged in the row of holes.

[0014] A side of the right stopper close to the limiting seat is an inclined surface, and a spring hole is provided at the bottom of the right stopper, and a spring is provided in the spring hole.

[0015] A set screw and a set nut are provided on the limiting seat, and one end of the set screw is pressed against the right stopper.

[0016] The present invention provides a high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine, which has the following advantages: 1. The present invention is simple to operate and does not require the adjustment of multiple parts. 2. The present invention's structure allows accurate measurement of the adjustment amount without the need for an external dial indicator. 3. The present invention eliminates positioning clearance and ensures accurate positioning. 4. The present invention facilitates conversion to automatic control (i.e., only a stepper motor or servo motor needs to be installed at the shaft end of the sun gear, and automatic adjustment can be achieved by controlling the motor). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine according to the present invention;

[0018] Figure 2 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 1 ;

[0019] Figure 3 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 2 (sun gear and dial);

[0020] Figure 4 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 3 ;

[0021] Figure 5 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 4 ;

[0022] Figure 6 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 5 ;

[0023] Figure 7 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 6 ;

[0024] Figure 8 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 7 (Limited Seat);

[0025] Figure 9 This is a partial structural diagram of a high-precision adjustment device for adjusting the upper and lower triangle alignment of a large circular knitting machine according to the present invention. Figure 8 (right block);

[0026] Figure 10 It is a structural diagram of the prior art;

[0027] The numbers are as follows: 1. Screw adjustment device; 101. Base; 102. End cover; 103. Screw; 104. Nut; 105. Sun gear; 106. Internal gear; 107. Planet gear; 108. Planet carrier bushing; 109. Scale; 110. Screw bushing; 111. Thrust needle roller bearing; 112. Round nut; 113. First needle roller bearing; 114. Second needle roller bearing; 115. O-ring; 116. Ruler; 117. Screw; 118. Groove; 119. Sliding groove; 120. Thread clearance adjustment hole; 2. Limit device; 201. Limit seat; 202. Left stopper; 203. Right stopper; 204. First needle roller; 205. Second needle roller; 206. Third needle roller; 207. Spring; 208. Set screw; 209. Set nut. DETAILED DESCRIPTION

[0028] The following combination Figure 1-8 For further explanation:

[0029] A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine comprises a screw adjustment device 1 and a limit device 2. The screw adjustment device 1 is fixedly connected to the large tripod, and the limit device 2 is fixedly connected to the sleeve.

[0030] The spiral adjustment device 1 includes a base 101, an end cover 102, a screw 103, a nut 104, a sun gear 105, an internal gear 106, a planetary gear 107, a planetary carrier bushing 108, a dial 109, a screw bushing 110, a thrust needle roller bearing 111, a round nut 112, a first needle roller bearing 113, a second needle roller bearing 114, an O-ring 115 and a scale 116.

[0031] The screw bushing 110 is tightly fitted with the base 101 , and the planet carrier bushing 108 is tightly fitted with the base 101 .

[0032] The screw 103 passes through the planet carrier bushing 108 and the screw bushing 110 , and a thrust needle roller bearing 111 is installed at the position shown in the figure. The screw 103 is locked with a round nut 112 to limit the axial movement of the screw 103 .

[0033] The screw 103 , the sun gear 105 , the internal gear 106 , and the planetary gears 107 constitute a planetary gear train.

[0034] The internal gear 106 is tightly matched with the base 101 to form a stationary wheel.

[0035] The shaft end of the sun gear 105 is connected to the screw 103 via a second needle bearing 114 for supporting the sun gear.

[0036] The sun gear 105 has a groove for mounting an O-ring 115 .

[0037] The sun gear 105 passes through the end cover 102 to support the sun gear.

[0038] The O-ring 115 is located between the sun gear 105 and the end cover 102 to increase resistance.

[0039] The scale plate 109 is connected to the sun gear 105 and realizes synchronous rotation through plane positioning.

[0040] The scale plate 109 is engraved with scales, and the adjustment amount can be known by comparing it with the zero mark on the base 101.

[0041] The nut 104 and the screw rod 103 form a spiral transmission. Due to the restriction of the sliding groove 119 of the base 101, the nut 104 can only slide left and right in the sliding groove 119.

[0042] The nut 104 has a slot 118 , and a screw 117 is used to adjust the thread clearance between the nut 104 and the screw rod 103 .

[0043] The base 101 has a threaded clearance adjustment hole 120 through which a wrench can be passed to adjust the screw 117.

[0044] A scale 116 is mounted on the base 101. The scale 116 is made of a transparent material and has scale marks on it. Through the scale, the slot 118 on the nut can be seen, and the adjustment amount can be known by the position of the slot 118 and the scale marks.

[0045] The limiting device 2 includes a limiting seat 201 , a left stopper 202 , a right stopper 203 , a first needle roller 204 , a second needle roller 205 , a third needle roller 206 , a spring 207 , a set screw 208 and a set nut 209 .

[0046] The limiting seat 201 has a row of holes, into which the first needle roller 204 is inserted.

[0047] The left stopper 202 has a row of holes, into which the second needle rollers 205 are inserted.

[0048] The right stopper 203 has a row of holes, into which the third needle roller 206 is inserted.

[0049] The second needle roller 205 , the third needle roller 206 and the nut 104 form a rolling friction pair, which can reduce the resistance when the nut 104 moves up and down.

[0050] The left stopper 202 is placed in the left groove of the limiting seat 201 and forms a rolling friction pair with the first needle roller 204 .

[0051] The right stopper 203 is placed in the right beveled groove of the stopper 201. The right stopper 203 and the right groove of the stopper 201 are beveled. A spring 207 holds the stopper 203 in place against the stopper 201, preventing it from moving up and down or forward or backward.

[0052] There are two holes at the bottom of the right stopper 203 for placing the spring 207 .

[0053] The set screw 208 presses against the right stopper 203 to ensure that the left and right stoppers 202 and 203 can clamp the nut 104 without any gap.

[0054] The set nut 209 is used to lock the set screw 208.

[0055] Specific steps:

[0056] Press the screw bushing 110, internal gear 106 and planetary carrier bushing 108 into the corresponding positions of the base 101. Install the scale 116 into the corresponding position of the base and fix it to the large tripod.

[0057] The first needle roller bearing 113 and the second needle roller bearing 114 are pressed into corresponding positions of the screw rod 103 .

[0058] Insert the nut 104 in advance into the sliding groove 119 of the base. After installing the thrust needle bearing 111 at the left end of the base 101, screw in the screw 103 and tighten the round nut 112. Ensure that the screw does not move axially.

[0059] The planetary gears 107 and the sun gear 105 are sequentially installed to form a planetary reduction mechanism.

[0060] After the O-ring 115 is installed on the sun gear 105, the end cover 102 is covered on the base 101 and tightened with screws.

[0061] Then press the scale plate 109 into the sun gear 105 to complete the assembly.

[0062] Rotate the sun gear to align the groove line of the screw 103 with the zero position of the scale.

[0063] Adjust the screw 117 on the nut 104 to eliminate the spiral clearance between the nut 104 and the screw rod 103. Turn the sun gear to ensure that the nut 104 and the screw rod 103 are not stuck.

[0064] Insert the first needle roller 204 into the corresponding hole of the limiting seat 201 .

[0065] Insert the second needle roller 205 into the corresponding hole of the left stopper 202 , and then insert it into the left groove of the limiting seat 201 .

[0066] Install the third needle roller 206 and the spring 207 into the corresponding holes of the right stopper 203 , and then install them into the right inclined groove of the limiting seat 201 .

[0067] Secure the pre-assembled stopper 201 to the sleeve. Ensure that the nut 104 is inserted between the left stopper 202 and the right stopper 203. Adjust the set screw 208 to ensure that there is no gap between the nut 104 and the left stopper 202 and the right stopper 203, and tighten the set nut 209.

[0068] When adjusting the alignment of the upper and lower triangles, the adjustment amount X can be roughly known by the scale number. And the precise adjustment amount Y can be known by the scale on the dial. Assuming that the pitch of the screw drive is P, the planetary reduction ratio is i, and the total number of scale lines on the dial is N. Then the adjustment amount of each scale on the dial is If P = 2 mm, i = 5, and N = 40, then w = 1 thread, meaning each rotation is 1 thread. If the dial rotates n threads, the adjustment is Xn = X + n*w / 100 mm.

[0069] During adjustment, the radial distance of nut 104 relative to the sleeve axis will change slightly. A gap exists between left stopper 202 and the left groove of limiter seat 201, effectively accommodating the change in the radial distance of nut 104 relative to the sleeve axis. Furthermore, the design of first needle roller 204 allows the left stopper to slide smoothly within the left groove.

[0070] When the gap between the upper and lower needle discs needs to be adjusted, that is, the sleeve needs to move up and down, since the second needle roller 205 and the third needle roller 206 are designed at the stopper, the sleeve can move up and down smoothly even if there is no gap between the nut 104 and the left stopper 202 and the right stopper 203.

[0071] For automation transformation, it is only necessary to install a stepper motor or a servo motor on the shaft end of the sun gear 105, and automatic adjustment can be achieved by controlling the motor.

[0072] The above description is not a limitation of the design of the present invention, and the design of the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the design of the present invention also fall within the scope of protection of the design of the present invention.

Claims

1. A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine, characterized by: The invention comprises a spiral adjustment device and a limiting device, wherein the spiral adjustment device comprises a base, wherein a screw and a sun gear are arranged in the base, wherein the sun gear is located on one side of the screw, wherein the sun gear is matched with a planetary gear, wherein the planetary gear and the screw are matched with each other, wherein an internal gear is arranged on the base, and wherein the planetary gear is located between the internal gear and the sun gear; The base is provided with a screw bushing and a planetary carrier bushing, the screw passes through the screw bushing and the planetary carrier bushing, the screw bushing is provided with a thrust needle bearing, and one end of the screw is provided with a round nut to lock the screw; One end of the base includes an end cover, the end cover is provided with a dial, and the dial is connected to the sun gear, the sun gear passes through the end cover, the end cover includes a zero mark, and the base is inlaid with a ruler, and the ruler is a transparent ruler; The screw is provided with a nut, and the nut and the screw form a spiral transmission. The base is provided with a sliding groove, and the nut slides in the movable groove. The nut is provided with a cutting groove, and a screw is provided at the cutting groove. The base is provided with a thread gap adjustment hole, and the thread gap adjustment hole is provided in cooperation with the screw. The limiting device comprises a limiting seat, and a left stopper and a right stopper are provided on the limiting seat, and the left stopper and the right stopper are clamping nuts.

2. A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine according to claim 1, characterized in that: A first needle roller bearing is provided between the planetary gear and the screw, and a second needle roller bearing is provided between the shaft end of the sun gear and the screw.

3. A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine according to claim 1, characterized in that: The sun gear includes a groove and an external hexagon. An O-ring is arranged in the groove, and the O-ring is located between the sun gear and the end cover.

4. A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine according to claim 1, characterized in that: The limit seat is provided with a row of holes on the side close to the left stopper, and a first needle roller is arranged in the row of holes. The left stopper is provided with a row of holes on the side close to the nut, and a second needle roller is arranged in the row of holes. The right stopper is provided with a row of holes on the side close to the nut, and a third needle roller is arranged in the row of holes.

5. A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine according to claim 1, characterized in that: A side of the right stopper close to the limiting seat is an inclined surface, and a spring hole is provided at the bottom of the right stopper, and a spring is provided in the spring hole.

6. A high-precision adjustment device for adjusting the alignment of the upper and lower triangles of a large circular knitting machine according to claim 1, characterized in that: A set screw and a set nut are provided on the limiting seat, and one end of the set screw is pressed against the right stopper.

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