Paper machine water needle movement control device and control method

Abstract

The invention relates to a paper machine water needle movement control device and method, and relates to the field of paper making equipment, the paper machine water needle movement control device comprises a cross beam frame, a water needle structure, a driving chain wheel, a driven chain wheel, a chain, a motor, a hand wheel and a clutch switching mechanism, an output shaft of the motor and the hand wheel are provided with a first clutch tooth and a second clutch tooth respectively, a transmission cylinder is coaxially fixed to the driving chain wheel, the clutch switching mechanism comprises a clutch sleeve, a limiting structure and a push-pull shaft, the outer wall of the clutch sleeve and the inner wall of the transmission cylinder are in rotation stopping and axial sliding fit, and the two ends of the clutch sleeve are provided with a third clutch tooth and a fourth clutch tooth respectively. The push-pull shaft and the clutch sleeve are in coaxial running fit and axial limiting fit; and the limiting structure is used for keeping the clutch sleeve at an automatic position or a manual position. The mechanical driving state and the manual driving state can be rapidly switched.

Description

Technical Field

[0001] The present application relates to the field of papermaking equipment, and in particular to a water needle movement control device and control method for a papermaking machine. Background Art

[0002] The paper threading water needle is an indispensable device in the continuous production of papermaking. It is fixed on the crossbeam structure of the papermaking machine's wire section. Its working principle is to allow extremely fine water jets to spray onto the surface of the fabric and the pulp and paper web, cutting the pulp and paper web on the fabric into narrow small strips suitable for paper threading. The small strips are then widened into a whole paper surface through the wire section of the papermaking machine, thereby realizing continued production.

[0003] Chinese patent publication number CN116240747B discloses a paper feed needle device for a papermaking machine, which includes: a crossbeam frame, a paper feed needle, a first sprocket, a second sprocket, a motor, a handwheel, a first clutch mechanism and a second clutch mechanism, wherein the first sprocket and the second sprocket are installed in the crossbeam frame for rotation at intervals; a chain is installed on the first sprocket and the second sprocket; a paper feed needle is provided on the chain; the output end of the motor is connected to the first sprocket via the first clutch mechanism, and the handwheel is connected to the second sprocket via the second clutch mechanism, and the handwheel can be connected to or disconnected from the first sprocket by moving the first clutch mechanism, and can be connected to or disconnected from the second sprocket by moving the second clutch mechanism.

[0004] Regarding the above-mentioned related technologies, when switching from mechanical drive to manual drive, it is necessary to disconnect the motor through the first clutch mechanism and then connect the hand wheel and the second sprocket through the second clutch mechanism, which is relatively cumbersome. Summary of the Invention

[0005] In order to quickly switch between mechanical drive and manual drive states, the present application provides a paper machine water needle movement control device and control method.

[0006] The present application provides a paper machine water needle movement control device, which adopts the following technical solution: The cam is secured to the drive shaft and has a first end in contact with the first gear and a second end in contact with the gear train, the second end of the cam being secured to the drive shaft by a spring.

[0007] By adopting the above technical solution, when the clutch sleeve is in the automatic position, the third clutch tooth is axially engaged with the first clutch tooth, and the limiting structure keeps the clutch sleeve in the automatic position. The torque of the motor is transmitted to the driving sprocket in turn through the cooperation between the third clutch tooth and the first clutch tooth and the anti-rotation cooperation between the clutch sleeve and the transmission cylinder. The driving sprocket drives the chain and the water needle structure to slide along the length direction of the crossbeam frame.

[0008] When the mechanical drive is switched to manual drive, the push-pull shaft is moved, and the push-pull shaft drives the clutch sleeve to move axially relative to the transmission cylinder toward the handwheel, and the third clutch tooth disengages from the first clutch tooth until the fourth clutch tooth is axially engaged with the second clutch tooth. During this process, due to the relative rotation cooperation between the push-pull shaft and the clutch sleeve, the torque of the clutch sleeve rotated under mechanical drive will not be transmitted to the push-pull shaft and damage the operator's hand. When it is in the manual position, the limiting structure keeps the clutch sleeve in the manual position, and the torque of the handwheel is transmitted to the driving sprocket in turn through the cooperation between the fourth clutch tooth and the second clutch tooth and the anti-rotation cooperation between the clutch sleeve and the transmission cylinder.

[0009] In summary, by setting the push-pull shaft, clutch sleeve and transmission cylinder, one axial movement of the push-pull shaft can disconnect the connection between the motor and the driving sprocket, and complete the connection between the handwheel and the driving sprocket, that is, quickly switch the mechanical drive and manual drive states, which is more convenient. Moreover, since the push-pull shaft and the clutch sleeve rotate relative to each other, the push-pull shaft can be directly operated without stopping the motor. The torque of the clutch sleeve rotated under mechanical drive will not be transmitted to the push-pull shaft to damage the operator's hands, which is safer.

[0010] Optionally, the limiting structure includes a limiting convex ring, two groups of steel balls and a limiting spring. The limiting convex ring is coaxially fixed to the outer peripheral surface of the clutch sleeve. The cross-sectional shape of the limiting convex ring is an isosceles triangle. The two conical surfaces of the limiting convex ring are respectively set as the first conical surface and the second conical surface, and the second conical surface is set away from the motor relative to the first conical surface; the two groups of steel balls are arranged axially at intervals along the transmission cylinder, and one group of steel balls includes a plurality of steel balls evenly arranged circumferentially along the transmission cylinder. The steel balls are radially slidingly matched with the transmission cylinder, and the limiting spring is used to force the steel balls to slide toward the axis of the transmission cylinder; when the clutch sleeve is in the automatic position, the steel balls abut against the second conical surface; when the clutch sleeve is in the manual position, the steel balls abut against the first conical surface.

[0011] Optionally, the clutch sleeve includes a first sleeve body and a second sleeve body axially separated, the third clutch tooth is provided at the end of the first sleeve body away from the second sleeve body, the fourth clutch tooth is provided at the end of the second sleeve body away from the first sleeve body, the inner circumferences of the first sleeve body and the second sleeve body are respectively fixed with a first annular protrusion and a second annular protrusion, the push-pull shaft rotating sleeve is provided with a push-pull sleeve, the end of the push-pull sleeve facing the motor is sleeved with a second shaft shoulder, the end of the push-pull sleeve facing the handwheel is fixed to the second annular protrusion, the push-pull sleeve is provided with a reset spring, the two ends of the reset spring respectively abut against the second shaft shoulder and the opposite surface of the first annular protrusion, and the elastic force of the reset spring is used to force the first annular protrusion and the second annular protrusion to abut axially; the limiting structure includes multiple groups of spring pieces, two groups of steel balls and a limiting spring, and the two groups of steel balls are axially along the transmission cylinder Arranged at intervals, a group of steel balls includes a plurality of steel balls arranged at intervals along the circumference of the transmission cylinder, the steel balls radially slide in cooperation with the sliding holes opened on the inner wall of the transmission cylinder, the cross-sectional profile of the sliding holes is square, and the limit spring is used to force the steel balls to slide toward the axis of the transmission cylinder, and each group of spring clips is arranged corresponding to each steel ball in the same group, a group of spring clips includes two first spring clips and one second spring clip, the first spring clip and the second spring clip are both V-shaped, one end of the first spring clip is fixed to the end of the first sleeve, one end of the second spring clip is fixed to the end of the second sleeve, the second spring clip is located in the circumferential gap between the two second spring clips, the two inclined surfaces of the first spring clip are respectively set as the first inclined surface and the second inclined surface, and the two inclined surfaces of the second spring clip are respectively set as the third inclined surface and the fourth inclined surface; the edge of the hole opening of the sliding hole close to the motor is provided with a chamfered surface, and the angle between the chamfered surface and the edge of the second inclined surface is 2°~25°.

[0012] Optionally, the elastic coefficient of the limit spring corresponding to the steel ball close to the motor is greater than the elastic coefficient of the limit spring corresponding to the steel ball close to the handwheel.

[0013] Optionally, the chamfered surface is covered and fixed with a rubber block, and one surface of the rubber block is flush with the inner wall of the sliding hole.

[0014] Optionally, both ends of the inner circumference of the transmission cylinder are fixed with internal splines, and the outer circumference of the clutch sleeve is fixed with external splines that match the internal splines.

[0015] Optionally, a braking structure is also included, which includes an elastic rod, which is vertically arranged, the lower end of the elastic rod is fixed to the inner wall of the crossbeam frame, and the upper end of the elastic rod is fixed with a rubber head, which is located on the axial movement path of the external spline toward the handwheel.

[0016] Optionally, the inner circumference of the clutch sleeve is protruded with a ring bulge, and the outer circumference of the push-pull shaft is fixed with two first shaft shoulders respectively located on both sides of the axial direction of the ring bulge. Two angular contact ball bearings arranged back to back are provided between the clutch sleeve and the push-pull shaft, and the inner rings of the two angular contact ball bearings are respectively fixed to the two first shaft shoulders, and the outer rings of the angular contact ball bearings are fixed to the inner wall of the clutch sleeve.

[0017] This application provides a control method for a water needle movement control device for a papermaking machine, which adopts the following technical solution: A control method for a water needle movement control device for a papermaking machine, comprising the following steps: when the clutch sleeve is in the automatic position, the third clutch tooth is axially engaged with the first clutch tooth, the steel ball abuts against the second conical surface, and the radial elastic force of the limit spring is converted into an axial elastic force through the second conical surface to force the third clutch tooth to tightly engage with the first clutch tooth, and the torque of the motor is sequentially transmitted to the driving sprocket through the cooperation of the third clutch tooth and the first clutch tooth and the anti-rotation cooperation of the clutch sleeve and the transmission cylinder, and the driving sprocket drives the chain and the water needle structure to slide along the length direction of the crossbeam frame. Shift; when switching from mechanical drive to manual drive, move the push-pull shaft, and the push-pull shaft drives the clutch sleeve to move axially relative to the transmission cylinder toward the handwheel, and the third clutch tooth disengages from the first clutch tooth until the fourth clutch tooth is axially engaged with the second clutch tooth, and the steel ball abuts against the first conical surface. The radial elastic force of the limit spring is converted into an axial elastic force through the first conical surface to force the fourth clutch tooth to be tightly engaged with the second clutch tooth, and the torque of the handwheel is transmitted to the driving sprocket in turn through the cooperation between the fourth clutch tooth and the second clutch tooth and the anti-rotation cooperation between the clutch sleeve and the transmission cylinder.

[0018] This application provides a control method for a water needle movement control device for a papermaking machine, which adopts the following technical solution: A control method for a water needle movement control device for a papermaking machine, comprising the following steps: when the clutch sleeve is in the automatic position, the third clutch tooth is axially engaged with the first clutch tooth, the first annular protrusion and the second annular protrusion are axially abutted, the steel ball abuts against the opposite edges of the second inclined surfaces of two adjacent first elastic sheets, and the steel ball is also stuck in the angle area between the chamfered surface and the edge of the second inclined surface, and the radial elastic force of the limit spring is converted into an axial elastic force through the edge of the second inclined surface to force the third clutch tooth to tightly engage with the first clutch tooth. The first clutch is engaged with the first tooth and the second clutch is engaged with the first tooth, and the second clutch is engaged with the first tooth and the second clutch is engaged with the first tooth. The second clutch is engaged with the first tooth and the second clutch is engaged with the first tooth and the second clutch is engaged with the first tooth. The second clutch is engaged with the first tooth and the second clutch is engaged with the first tooth. The second clutch is engaged with the first tooth and the second clutch is engaged with the first tooth. When the second spring is released, the spring will release the pressure from the spring to release the pressure gauge, and the spring will release the pressure gauge to release the pressure gauge, which will in turn move the spring back to the push-pull sleeve and the first spring. The body and the second sleeve body move axially for a distance toward the handwheel, so that the third clutch tooth disengages from the first clutch tooth until the fourth clutch tooth is axially engaged with the second clutch tooth. At this time, another group of steel balls abuts against the fourth inclined surface of the second elastic piece, and the radial elastic force of the limit spring is converted into an axial elastic force through the fourth inclined surface to force the fourth clutch tooth to tightly engage with the second clutch tooth. The torque of the handwheel is transmitted to the driving sprocket in sequence through the cooperation between the fourth clutch tooth and the second clutch tooth and the anti-rotation cooperation between the clutch sleeve and the transmission cylinder.

[0019] In summary, this application includes at least one of the following beneficial technical effects: By setting the push-pull shaft, clutch sleeve and transmission cylinder, one axial movement of the push-pull shaft can disconnect the connection between the motor and the driving sprocket, and complete the connection between the handwheel and the driving sprocket, that is, quickly switching between mechanical drive and manual drive state, which is more convenient. Moreover, since the push-pull shaft and the clutch sleeve rotate relative to each other, the push-pull shaft can be directly operated without stopping the motor. The torque of the clutch sleeve rotated under mechanical drive will not be transmitted to the push-pull shaft to damage the operator's hands, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the overall structure of Example 1.

[0021] Figure 2 This is a cross-sectional view of the beam frame of Example 1.

[0022] Figure 3 yes Figure 1 Cross-sectional view in the AA direction.

[0023] Figure 4 Schematic diagram of the clutch sleeve of Example 1.

[0024] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle.

[0025] Figure 6 It is a cross-sectional view of the clutch sleeve of Example 1 in the manual position.

[0026] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle.

[0027] Figure 8 It is a cross-sectional view of the clutch sleeve of Example 2 in the manual position.

[0028] Figure 9 It is a cross-sectional view of the clutch sleeve of Example 3 in the automatic position.

[0029] Figure 10 Schematic diagram of the clutch sleeve of Example 3.

[0030] Figure 11 yes Figure 9 A partial enlarged view of point D in the middle.

[0031] Figure 12 yes Figure 11 A partial enlarged view of point E in the middle.

[0032] Figure 13 yes Figure 10 A partial enlarged view of point F in the middle.

[0033] Figure 14 It is a partial cross-sectional view of the clutch sleeve of Example 3 in the manual position.

[0034] Figure 15 It is a partial cross-sectional view of the clutch sleeve of Example 4 in the automatic position.

[0035] Explanation of Reference Numerals: 1. clutch switching mechanism; 2. water needle structure; 5. transmission cylinder; 10. crossbeam frame; 100. notch; 101. chain; 102. driving sprocket; 103. driven sprocket; 105. rotating seat; 11. clutch sleeve; 111. external spline; 112. third clutch tooth; 113. fourth clutch tooth; 114. annular protrusion; 12. push-pull shaft; 121. first shaft shoulder; 122. angular contact ball bearing; 13. push-pull sleeve; 131. second shaft shoulder; 132. return spring; 15. first housing; 151. first annular protrusion; 16. second housing; 161. Second annular protrusion; 21. Base; 22. Water needle head; 23. Slide rail; 31. Motor; 311. First clutch tooth; 32. Handwheel; 321. Second clutch tooth; 51. Internal spline; 52. Sliding hole; 521. Chamfered surface; 522. Rubber block; 61. Limiting convex ring; 611. First conical surface; 612. Second conical surface; 62. Steel ball; 63. Limiting spring; 65. First spring piece; 651. First inclined surface; 652. Second inclined surface; 66. Second spring piece; 661. Third inclined surface; 662. Fourth inclined surface; 71. Elastic rod; 72. Rubber head. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1 -Attached Figure 15 This application is described in further detail.

[0037] Example 1: Example 1 discloses a paper machine water needle movement control device, such as Figure 1 、 Figure 2 、 Figure 3 As shown, the paper machine water needle movement control device includes a beam frame 10, a water needle structure 2, a driving sprocket 102, a driven sprocket 103, a chain 101, a motor 31, a hand wheel 32 and a clutch switching mechanism 1. The beam frame 10 is a long shell structure with a long strip notch 100. The beam frame 10 is installed above the paper machine mesh part. The driving sprocket 102 and the driven sprocket 103 are respectively rotatably arranged at the two ends of the length direction inside the beam frame 10. The driving sprocket 102 is coaxially fixed with a transmission cylinder 5. The transmission The cylinder 5 is arranged to rotate relative to the crossbeam frame 10 through the rotating seat 105, and the chain 101 passes around the driving sprocket 102 and the driven sprocket 103; the water needle structure 2 includes a seat body 21 and a water needle head 22 arranged on the seat body 21, and the bottom inner bottom of the crossbeam frame 10 is provided with a slide rail 23 extending along its own length direction. The seat body 21 slides with the slide rail 23, and the seat body 21 is fixedly connected to the chain 101. One side of the seat body 21 extends from the notch 100 of the crossbeam frame 10 to the outside, so that the water needle head 22 is located on the outside of the crossbeam frame 10.

[0038] The rotation of the driving sprocket 102 drives the chain 101 to move, thereby driving the water needle head 22 to move along the length direction of the crossbeam frame 10 to control the movement and stop position of the water needle head 22.

[0039] like Figure 3 、 Figure 4 As shown, the motor 31 and the handwheel 32 are respectively located on both axial sides of the driving sprocket 102. Specifically, the main body of the motor 31 is installed on the outer wall of the crossbeam frame 10, and the output shaft of the motor 31 extends into the interior of the crossbeam frame 10. The output shaft of the motor 31 is coaxial with the transmission cylinder 5 of the driving sprocket 102. The handwheel 32 rotates with the crossbeam frame 10. The handwheel 32 is coaxial with the transmission cylinder 5 of the driving sprocket 102. The output shaft of the motor 31 is fixed with a first clutch tooth 311, and the center of the handwheel 32 is fixed with a second clutch tooth 321. The first clutch tooth 311 and the second clutch tooth 321 are triangular in shape.

[0040] like Figure 3 、 Figure 4 As shown, the clutch switching mechanism 1 includes a clutch sleeve 11, a limiting structure and a push-pull shaft 12. The outer wall of the clutch sleeve 11 and the inner wall of the transmission cylinder 5 are prevented from rotating and axially slidingly matched (preventing rotation means that the clutch sleeve 11 cannot rotate relative to the transmission cylinder 5, and the torque of the clutch sleeve 11 can drive the transmission cylinder 5 to rotate). Specifically, both ends of the inner circumference of the transmission cylinder 5 are fixed with internal splines 51, and both ends of the outer circumference of the clutch sleeve 11 are fixed with external splines 111. The internal splines 51 and the external splines 111 cooperate to allow the clutch sleeve 11 to slide axially relative to the transmission cylinder 5, and at the same time, the torque of the clutch sleeve 11 can be transmitted to the transmission cylinder 5.

[0041] like Figure 3 、 Figure 4 As shown, the third clutch tooth 112 and the fourth clutch tooth 113 are fixed to both ends of the clutch sleeve 11 respectively, wherein the third clutch tooth 112 is arranged toward the first clutch tooth 311, and the fourth clutch tooth 113 is arranged toward the second clutch tooth 321, and the third clutch tooth 112 and the fourth clutch tooth 113 are triangular in shape.

[0042] like Figure 3 and Figure 5As shown, the push-pull shaft 12 is arranged in the clutch sleeve 11, and one end of the push-pull shaft 12 passes through the hole at the center of the handwheel 32 and is located on the outside of the handwheel 32. The end is easy for the operator to hold the push-pull shaft 12. The push-pull shaft 12 and the clutch sleeve 11 rotate coaxially and are axially limited. Specifically, the inner circumferential surface of the clutch sleeve 11 is protruded with a circle of annular protrusions 114, and the annular protrusions 114 are coaxially arranged with the clutch sleeve 11. Two first shaft shoulders 121 are fixed to the outer circumference of the push-pull shaft 12. The two first shaft shoulders 121 are respectively located on both sides of the axial direction of the annular protrusions 114. Between the clutch sleeve 11 and the push-pull shaft 12 Two angular contact ball bearings 122 are arranged back to back. The inner rings of the two angular contact ball bearings 122 are fixed to the two first shaft shoulders 121 respectively, and the outer rings of the angular contact ball bearings 122 are fixed to the inner wall of the clutch sleeve 11. The angular contact ball bearings 122 can withstand axial and radial forces. In this way, the axial movement of the push-pull shaft 12 will drive the clutch sleeve 11 to move axially synchronously. At the same time, the clutch sleeve 11 can rotate relative to the push-pull shaft 12, and the torque of the clutch sleeve 11 will not be transmitted to the push-pull shaft 12, thereby reducing the damage to the operator's hands caused by the rotating push-pull shaft 12.

[0043] The two positions of the axial movement of the clutch sleeve 11 in the transmission cylinder 5 are set as the automatic position and the manual position respectively. Figure 3 The position of the middle clutch sleeve 11 is the automatic position. When the clutch sleeve 11 is in the automatic position, the third clutch tooth 112 is axially engaged with the first clutch tooth 311, and the torque of the motor 31 is transmitted to the driving sprocket 102 in turn through the cooperation between the third clutch tooth 112 and the first clutch tooth 311 and the anti-rotation cooperation between the clutch sleeve 11 and the transmission cylinder 5. The driving sprocket 102 drives the chain 101 and the water needle structure 2 to slide along the length direction of the crossbeam frame 10.

[0044] Figure 6 The position of the middle clutch sleeve 11 is the manual position. When the clutch sleeve 11 is in the manual position, the fourth clutch tooth 113 is axially engaged with the second clutch tooth 321, and the torque of the handwheel 32 is transmitted to the driving sprocket 102 in turn through the cooperation between the fourth clutch tooth 113 and the second clutch tooth 321 and the anti-rotation cooperation between the clutch sleeve 11 and the transmission cylinder 5. The driving sprocket 102 drives the chain 101 and the water needle structure 2 to slide along the length direction of the crossbeam frame 10.

[0045] like Figure 5 、 Figure 7 As shown, the limiting structure is used to keep the clutch sleeve 11 in the automatic position or the manual position. Specifically, the limiting structure includes a limiting convex ring 61, two sets of steel balls 62 and a limiting spring 63. The limiting convex ring 61 is coaxially fixed to the outer peripheral surface of the clutch sleeve 11. The cross-sectional shape of the limiting convex ring 61 is an isosceles triangle. The two conical surfaces of the limiting convex ring 61 are respectively set as a first conical surface 611 and a second conical surface 612. The second conical surface 612 is set away from the motor 31 relative to the first conical surface 611. Two groups of steel balls 62 are arranged axially at intervals along the transmission cylinder 5. One group of steel balls 62 includes multiple steel balls 62 evenly arranged circumferentially along the transmission cylinder 5. The steel balls 62 radially slide with the sliding holes 52 opened in the transmission cylinder 5. The limit spring 63 is located in the sliding hole 52. The elastic force of the limit spring 63 is used to force the steel balls 62 to slide toward the axial direction of the transmission cylinder 5. In addition, the radial distance between the inner wall of the transmission cylinder 5 and the outer wall of the clutch sleeve 11 is smaller than the radius of the steel balls 62, so that the steel balls 62 are not easy to fall out of the sliding hole 52 and the steel balls 62 are not easy to move.

[0046] This embodiment also discloses a control method for a water needle movement control device for a paper machine, which comprises the following steps: when the clutch sleeve 11 is in the automatic position (see Figure 3 and Figure 5 ), the third clutch tooth 112 is axially engaged with the first clutch tooth 311, the steel ball 62 abuts against the second conical surface 612, and the radial elastic force of the limit spring 63 is converted into an axial elastic force through the second conical surface 612 to force the third clutch tooth 112 to tightly engage with the first clutch tooth 311. The torque of the motor 31 is sequentially transmitted to the driving sprocket 102 through the cooperation between the third clutch tooth 112 and the first clutch tooth 311 and the anti-rotation cooperation between the clutch sleeve 11 and the transmission cylinder 5. The driving sprocket 102 drives the chain 101 and the water needle structure 2 to slide along the length direction of the crossbeam frame 10.

[0047] When the mechanical drive is switched to manual drive, the push-pull shaft 12 is moved, and the push-pull shaft 12 drives the clutch sleeve 11 to move axially relative to the transmission cylinder 5 in the direction toward the handwheel 32. The third clutch tooth 112 disengages from the first clutch tooth 311, and the axial force of the push-pull shaft 12 drives the limiting convex ring 61 to move relative to the steel ball 62. The steel ball 62 is pressed into the sliding hole 52 under the guidance of the second conical surface 612, that is, the steel ball 62 avoids the limiting convex ring 61, and the limiting convex ring 61 and the clutch sleeve 11 can continue to move axially to another group of steel balls 62. At this time, the second conical surface 612 of the limiting convex ring 61 first contacts the bottom of the group of steel balls 62 to press the steel ball 62 into the sliding hole 52, so that the first conical surface 611 of the limiting convex ring 61 can axially pass over the steel ball 62, and the push-pull shaft 12 drives the clutch sleeve 11 to continue to move axially until the fourth clutch tooth 113 is axially engaged with the second clutch tooth 321 (see Figure 6 and Figure 7 ), at this time, the steel ball 62 abuts against the first conical surface 611, and the radial elastic force of the limit spring 63 is converted into an axial elastic force through the first conical surface 611, forcing the fourth clutch tooth 113 and the second clutch tooth 321 to fit tightly together. The torque of the handwheel 32 is transmitted to the driving sprocket 102 in turn through the cooperation between the fourth clutch tooth 113 and the second clutch tooth 321 and the anti-rotation cooperation between the clutch sleeve 11 and the transmission cylinder 5.

[0048] Since the limiting effect of the limiting structure mainly comes from the elastic force of the limiting spring 63, the greater the elastic force of the limiting spring 63, the more difficult it is for the first clutch tooth 311 and the third clutch tooth 112 to disengage axially. Therefore, in other embodiments, the elastic coefficient of the limiting spring 63 can be set, and the elastic coefficient of the limiting spring 63 corresponding to the steel ball 62 close to the motor 31 is greater than the elastic coefficient of the limiting spring 63 corresponding to the steel ball 62 close to the handwheel 32, thereby improving the anti-axial disengagement ability under mechanical drive and improving the easy axial push-pull ability under manual drive.

[0049] Secondly, in other embodiments, an in-position sensor can also be set in the crossbeam frame 10. When the clutch sleeve 11 moves axially to a position where it is disconnected from the output shaft of the motor 31, or the clutch sleeve 11 moves axially to a position where it begins to connect with the handwheel 32, the in-position sensor detects that the clutch sleeve 11 is in the above position, and the in-position sensor stops the motor 31 through the controller.

[0050] The implementation principle of Example 1 is: by setting the push-pull shaft 12, the clutch sleeve 11 and the transmission cylinder 5, a single axial movement of the push-pull shaft 12 can disconnect the connection between the motor 31 and the driving sprocket 102, and complete the connection between the handwheel 32 and the driving sprocket 102, that is, quickly switch the mechanical drive and manual drive states, which is more convenient, and because the push-pull shaft 12 and the clutch sleeve 11 rotate relative to each other, the push-pull shaft 12 can be directly operated without stopping the motor 31, and the torque of the clutch sleeve 11 rotated under mechanical drive will not be transmitted to the push-pull shaft 12 and damage the operator's hands, which is safer.

[0051] Example 2: Example 2 makes the following settings based on Example 1, such as Figure 8 As shown, the paper machine water needle movement control device also includes a braking structure, which includes an elastic rod 71. The elastic rod 71 is vertically arranged, and the lower end of the elastic rod 71 is fixed to the inner wall of the crossbeam frame 10. The upper end of the elastic rod 71 is fixed with a rubber head 72, and the rubber head 72 is located on the axial movement path of the external spline 111 toward the handwheel 32.

[0052] When the push-pull shaft 12 is moved axially to disconnect the clutch sleeve 11 from the output shaft of the rotating motor 31, the driving sprocket 102 will continue to rotate due to rotational inertia. At this time, the external spline 111 of the clutch sleeve 11 moves to the rubber head 72. The external spline 111 interferes and collides with the rubber head 72 as the driving sprocket 102 rotates. The collision force forces the elastic rod 71 to elastically avoid the external spline 111, so that the rubber head 72 and the external spline 111 maintain a friction state and will not be directly stuck on the external spline 111. The friction braking force is used to stop the driving sprocket 102 and the clutch sleeve 11 from rotating, so that the stationary clutch sleeve 11 and the handwheel 32 can be connected.

[0053] Example 3: Example 3 is different from Example 1 in that Figure 9 、 Figure 10 As shown, the clutch sleeve 11 includes a first sleeve body 15 and a second sleeve body 16 which are separated along the axial direction, the third clutch tooth 112 is fixed to the end of the first sleeve body 15 away from the second sleeve body 16, and the fourth clutch tooth 113 is fixed to the end of the second sleeve body 16 away from the first sleeve body 15.

[0054] like Figure 11 、 Figure 12 As shown, the inner circumferences of the first sleeve 15 and the second sleeve 16 are respectively fixed with a first annular convex portion 151 and a second annular convex portion 161, the push-pull shaft 12 is provided with a push-pull sleeve 13 when it rotates, and the push-pull shaft 12 can drive the push-pull sleeve 13 to move axially synchronously. The matching structure between the push-pull sleeve 13 and the push-pull shaft 12 can refer to the structure of the combination of the angular contact ball bearing 122, the first shaft shoulder 121 and the annular convex portion 114 in Example 1. The end of the push-pull sleeve 13 facing the motor 31 is sleeved with a second shaft shoulder 131, and the end of the push-pull sleeve 13 facing the hand wheel 32 is fixed with the second annular convex portion 131. 161 are fixed, that is, the push-pull shaft 12 can drive the push-pull sleeve 13 and the second sleeve 16 to move axially synchronously. The push-pull sleeve 13 is provided with a reset spring 132. The two ends of the reset spring 132 respectively abut against the second shaft shoulder 131 and the opposite surfaces of the first annular protrusion 151. The elastic force of the reset spring 132 is used to force the first annular protrusion 151 and the second annular protrusion 161 to abut axially. In this axial abutment state, there is an avoidance gap between the opposite end faces of the first sleeve 15 and the second sleeve 16 to provide an avoidance space for the elastic deflection of the first spring piece 65 and the second spring piece 66.

[0055] like Figure 11 、 Figure 12 、 Figure 13 As shown, the limiting structure includes multiple groups of springs, two groups of steel balls 62 and limiting springs 63. The two groups of steel balls 62 are arranged axially at intervals along the transmission cylinder 5. One group of steel balls 62 includes multiple steel balls 62 arranged circumferentially at intervals along the transmission cylinder 5. The steel balls 62 are radially slidably fitted with the sliding holes 52 opened on the inner wall of the transmission cylinder 5. The cross-sectional profile of the sliding hole 52 is square. The limiting spring 63 is used to force the steel balls 62 to slide toward the axial direction of the transmission cylinder 5.

[0056] like Figure 12 、 Figure 13As shown, each group of spring pieces is arranged corresponding to each steel ball 62 in the same group. A group of spring pieces includes two first spring pieces 65 and one second spring piece 66. The first spring piece 65 and the second spring piece 66 are both V-shaped. The bending parts of the first spring piece 65 and the second spring piece 66 are both away from the axis of the clutch sleeve 11. One end of the first spring piece 65 is fixed to the end of the first sleeve body 15, and one end of the second spring piece 66 is fixed to the end of the second sleeve body 16. The second spring piece 66 is located in the circumferential gap between the two second spring pieces 66, and the second spring piece 66 is axially offset from the first spring piece 65 along the clutch sleeve 11.

[0057] The two inclined surfaces of the first spring piece 65 are designated as a first inclined surface 651 and a second inclined surface 652, respectively. The two inclined surfaces of the second spring piece 66 are designated as a third inclined surface 661 and a fourth inclined surface 662, respectively. A chamfered surface 521 is provided on the edge of the sliding hole 52 near the motor 31. The angle between the chamfered surface 521 and the edge of the second inclined surface 652 is 2° to 25°.

[0058] When the clutch sleeve 11 is in the automatic position (see Figure 12 ), the third clutch tooth 112 is axially engaged with the first clutch tooth 311, the first annular protrusion 151 is axially abutted against the second annular protrusion 161 under the elastic force of the return spring 132, and the elastic force of the limit spring 63 forces the steel ball 62 to abut against the opposite edges of the second inclined surfaces 652 of the two adjacent first elastic sheets 65 (see Figure 12 and Figure 13 ), the radial elastic force of the limit spring 63 is converted into an axial elastic force through the edge of the second inclined surface 652 to force the third clutch tooth 112 to tightly fit with the first clutch tooth 311, and the elastic force of the limit spring 63 also causes the steel ball 62 to be stuck in the angle area between the chamfered surface 521 and the edge of the second inclined surface 652, so as to increase the difficulty of the clutch sleeve 11 axially disengaging from the motor 31. Therefore, the torque of the motor 31 is transmitted to the driving sprocket 102 in sequence through the cooperation between the third clutch tooth 112 and the first clutch tooth 311 and the anti-rotation cooperation between the clutch sleeve 11 and the transmission cylinder 5.

[0059] When the mechanical drive is switched to manual drive, the push-pull shaft 12 is first moved to drive the push-pull sleeve 13, the second sleeve 16 and the second spring piece 66 to move axially a certain distance toward the handwheel 32. Since the steel ball 62 has a clamping force on the first spring piece 65, the first sleeve 15 remains stationary, and the second annular protrusion 161 and the second sleeve 16 move axially away from the first sleeve 15. At the same time, the reset spring 132 is compressed. At this time, the third inclined surface 661 of the second spring piece 66 abuts against the bottom of the steel ball 62. Under the guidance of the bottom of the steel ball 62, the second spring piece 66 elastically deflects toward the axis of the clutch sleeve 11. The elastic force of the second spring piece 66 and the abutment point position of the third inclined surface 661 relative to the steel ball 62 change with the movement of the second sleeve 16 (the elastic force of the second spring piece 66 gradually increases, and the direction in which the third inclined surface 661 exerts force on the steel ball 62 gradually becomes flat). The second spring piece 66 pushes the steel ball 62 from the angle area between the chamfered surface 521 and the edge of the second inclined surface 652 into the sliding hole 52, that is, the embedded state of the steel ball 62 is released. After the steel ball 62 is separated from the chamfered surface 521, the limiting effect of the steel ball 62 on the first spring piece 65 is weakened, and the push-pull shaft 12 is moved to drive the push-pull sleeve 13, the first sleeve 15 and the second sleeve 16 to move axially a distance toward the hand wheel 32 (the axial movement force of the second sleeve 16 will be transmitted to the first sleeve 15 through the return spring 132 to drive the first sleeve 15 to move axially synchronously), so that the third clutch tooth 112 is separated from the first clutch tooth 311 until the fourth clutch tooth 113 is axially engaged with the second clutch tooth 321. At this time, another group of steel balls 62 abut against the fourth inclined surface 662 of the second spring piece 66 (see Figure 14 ), the radial elastic force of the limit spring 63 is converted into an axial elastic force through the fourth inclined surface 662, which forces the fourth clutch tooth 113 to tightly fit with the second clutch tooth 321. The torque of the handwheel 32 is transmitted to the driving sprocket 102 in sequence through the cooperation between the fourth clutch tooth 113 and the second clutch tooth 321 and the anti-rotation cooperation between the clutch sleeve 11 and the transmission cylinder 5.

[0060] In summary, since the steel ball 62 only abuts against the fourth inclined surface 662 of the second spring piece 66, the steel ball 62 is not in an embedded state. Therefore, when the push-pull shaft 12 subsequently moves to disconnect the handwheel 32, the steel ball 62 can be easily pushed into the sliding hole 52, thereby improving the anti-axial disengagement ability under mechanical drive and improving the easy axial push-pull ability under manual drive.

[0061] Example 4: Example 4 makes the following settings based on Example 3, such as Figure 15 As shown, a rubber block 522 is bonded to the chamfered surface 521 , and one surface of the rubber block 522 is flush with the inner wall of the sliding hole 52 .

[0062] When the steel ball 62 is in the engaged state, the steel ball 62 compresses the rubber block 522 , and the friction of the rubber block 522 is used to further limit the steel ball 62 , thereby improving the anti-axial separation capability of the clutch sleeve 11 under mechanical drive.

[0063] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A water needle movement control device for a paper machine, comprising a crossbeam frame (10), a water needle structure (2), a driving sprocket (102), a driven sprocket (103), a chain (101), a motor (31) and a hand wheel (32), characterized in that: The invention also includes a clutch switching mechanism (1), wherein a motor (31) and a hand wheel (32) are respectively located on both axial sides of a driving sprocket (102), an output shaft of the motor (31) and a hand wheel (32) are respectively provided with a first clutch tooth (311) and a second clutch tooth (321), a driving sprocket (102) is coaxially fixed with a transmission cylinder (5), and the clutch switching mechanism (1) includes a clutch sleeve (11), a limiting structure and a push-pull shaft (12), an outer wall of the clutch sleeve (11) and an inner wall of the transmission cylinder (5) are rotationally fixed and axially slidingly matched, and a third clutch tooth is respectively provided at both ends of the clutch sleeve (11). (112) and the fourth clutch tooth (113), the push-pull shaft (12) and the clutch sleeve (11) are coaxially rotated and axially limited; the two positions of the clutch sleeve (11) axially moving in the transmission cylinder (5) are respectively set as the automatic position and the manual position, and the limiting structure is used to keep the clutch sleeve (11) in the automatic position or the manual position; when the clutch sleeve (11) is in the automatic position, the third clutch tooth (112) and the first clutch tooth (311) are axially engaged, and when the clutch sleeve (11) is in the manual position, the fourth clutch tooth (113) and the second clutch tooth (321) are axially engaged.

2. The paper machine water needle movement control device according to claim 1, characterized in that: The limiting structure comprises a limiting convex ring (61), two groups of steel balls (62) and a limiting spring (63). The limiting convex ring (61) is coaxially fixed to the outer peripheral surface of the clutch sleeve (11). The cross-sectional shape of the limiting convex ring (61) is an isosceles triangle. The two conical surfaces of the limiting convex ring (61) are respectively set as a first conical surface (611) and a second conical surface (612). The second conical surface (612) is set away from the motor (31) relative to the first conical surface (611). The two groups of steel balls (62) are arranged along the transmission cylinder (5). Axially spaced, a group of steel balls (62) includes a plurality of steel balls (62) uniformly arranged along the circumference of the transmission cylinder (5), the steel balls (62) and the transmission cylinder (5) are radially slidingly matched, and a limit spring (63) is used to force the steel balls (62) to slide toward the axial direction of the transmission cylinder (5); when the clutch sleeve (11) is in the automatic position, the steel balls (62) abut against the second conical surface (612); when the clutch sleeve (11) is in the manual position, the steel balls (62) abut against the first conical surface (611).

3. The paper machine water needle movement control device according to claim 1, characterized in that: The clutch sleeve (11) comprises a first sleeve body (15) and a second sleeve body (16) which are axially separated, the third clutch tooth (112) being arranged at the end of the first sleeve body (15) away from the second sleeve body (16), the fourth clutch tooth (113) being arranged at the end of the second sleeve body (16) away from the first sleeve body (15), the inner circumferences of the first sleeve body (15) and the second sleeve body (16) are respectively fixed with a first annular protrusion (151) and a second annular protrusion (161), the push-pull shaft (12) is rotatably sleeved with a push-pull sleeve (13), and the push-pull sleeve (13) is oriented toward the motor (31). The end portion is sleeved with a second shaft shoulder (131), the end portion of the push-pull sleeve (13) facing the hand wheel (32) is fixed to the second annular protrusion (161), the push-pull sleeve (13) is sleeved with a reset spring (132), the two ends of the reset spring (132) respectively abut against the second shaft shoulder (131) and the opposite surface of the first annular protrusion (151), and the elastic force of the reset spring (132) is used to force the first annular protrusion (151) and the second annular protrusion (161) to abut axially; the limiting structure includes multiple groups of springs, two groups of steel balls (62) and a limiting spring (63), the two groups of steel balls (62) are arranged along the transmission cylinder ( 5) axially spaced, a group of steel balls (62) includes a plurality of steel balls (62) spaced along the circumference of the transmission cylinder (5), the steel balls (62) and the sliding holes (52) opened on the inner wall of the transmission cylinder (5) are radially slidingly matched, the cross-sectional profile of the sliding hole (52) is square, and the limit spring (63) is used to force the steel balls (62) to slide toward the axial direction of the transmission cylinder (5), each group of spring pieces is correspondingly arranged with each steel ball (62) in the same group, and a group of spring pieces includes two first spring pieces (65) and a second spring piece (66), the first spring piece (65) and the second spring piece (66) are both V-shaped, one end of the first spring piece (65) is in contact with the first spring piece (66), and the second spring piece (66) is in contact with the first spring piece (65). The end of the sleeve (15) is fixed, one end of the second elastic piece (66) is fixed to the end of the second sleeve (16), the second elastic piece (66) is located in the circumferential gap between the two second elastic pieces (66), the two inclined surfaces of the first elastic piece (65) are respectively set as the first inclined surface (651) and the second inclined surface (652), and the two inclined surfaces of the second elastic piece (66) are respectively set as the third inclined surface (661) and the fourth inclined surface (662); the edge of the opening of the sliding hole (52) close to the motor (31) is provided with a chamfered surface (521), and the angle between the chamfered surface (521) and the edge of the second inclined surface (652) is 2°~25°.

4. The water needle movement control device for a paper machine according to claim 2 or 3, characterized in that: The elastic coefficient of the limit spring (63) corresponding to the steel ball (62) close to the motor (31) is greater than the elastic coefficient of the limit spring (63) corresponding to the steel ball (62) close to the hand wheel (32).

5. The paper machine water needle movement control device according to claim 3, characterized in that: The chamfered surface (521) is covered and fixed with a rubber block (522), and one surface of the rubber block (522) is flush with the inner wall of the sliding hole (52).

6. The water needle movement control device for a paper machine according to any one of claims 1 to 3, characterized in that: Internal splines (51) are fixed on both ends of the inner circumference of the transmission cylinder (5), and external splines (111) matching the internal splines (51) are fixed on the outer circumference of the clutch sleeve (11).

7. The paper machine water needle movement control device according to claim 6, characterized in that: The brake structure also includes an elastic rod (71), which is vertically arranged. The lower end of the elastic rod (71) is fixed to the inner wall of the crossbeam frame (10), and the upper end of the elastic rod (71) is fixed with a rubber head (72). The rubber head (72) is located on the axial movement path of the external spline (111) toward the hand wheel (32).

8. The paper machine water needle movement control device according to claim 1 or 2, characterized in that: The inner circumference of the clutch sleeve (11) is protruded with a ring convexity (114); the outer circumference of the push-pull shaft (12) is fixed with two first shaft shoulders (121) respectively located on both axial sides of the ring convexity (114); two angular contact ball bearings (122) arranged back to back are provided between the clutch sleeve (11) and the push-pull shaft (12); the inner rings of the two angular contact ball bearings (122) are respectively fixed to the two first shaft shoulders (121); and the outer rings of the angular contact ball bearings (122) are fixed to the inner wall of the clutch sleeve (11).

9. A control method for a water needle movement control device for a papermaking machine according to claim 2, characterized in that: The following steps are involved: When the clutch sleeve (11) is in the automatic position, the third clutch tooth (112) is axially engaged with the first clutch tooth (311), the steel ball (62) abuts against the second conical surface (612), and the radial elastic force of the limit spring (63) is converted into an axial elastic force through the second conical surface (612) to force the third clutch tooth (112) to be tightly engaged with the first clutch tooth (311). The torque of the motor (31) is sequentially transmitted to the driving sprocket (102) through the cooperation between the third clutch tooth (112) and the first clutch tooth (311) and the anti-rotation cooperation between the clutch sleeve (11) and the transmission cylinder (5). The driving sprocket (102) drives the chain (101) and the water needle structure (2) to slide along the length direction of the crossbeam frame (10); when the mechanical drive is switched to the manual drive, , move the push-pull shaft (12), the push-pull shaft (12) drives the clutch sleeve (11) to move axially relative to the transmission cylinder (5) in the direction toward the handwheel (32), the third clutch tooth (112) is disengaged from the first clutch tooth (311), until the fourth clutch tooth (113) is axially engaged with the second clutch tooth (321), the steel ball (62) abuts against the first conical surface (611), the radial elastic force of the limit spring (63) is converted into an axial elastic force that forces the fourth clutch tooth (113) and the second clutch tooth (321) to be tightly engaged through the first conical surface (611), and the torque of the handwheel (32) is sequentially transmitted to the active sprocket (102) through the cooperation between the fourth clutch tooth (113) and the second clutch tooth (321), and the anti-rotation cooperation between the clutch sleeve (11) and the transmission cylinder (5).

10. A control method for a water needle movement control device for a paper machine according to claim 3, characterized in that: The invention comprises the following steps: when the clutch sleeve (11) is in the automatic position, the third clutch tooth (112) is axially engaged with the first clutch tooth (311), the first annular protrusion (151) and the second annular protrusion (161) are axially abutted, the steel ball (62) abuts against the opposite edges of the second inclined surfaces (652) of two adjacent first elastic sheets (65), and the steel ball (62) is also embedded in the angle area between the chamfered surface (521) and the edge of the second inclined surface (652), and the limit spring (63) is The radial elastic force is converted into an axial elastic force through the edge of the second inclined surface (652) to force the third clutch tooth (112) to be tightly engaged with the first clutch tooth (311), and the torque of the motor (31) is sequentially transmitted to the driving sprocket (102) through the cooperation between the third clutch tooth (112) and the first clutch tooth (311) and the anti-rotation cooperation between the clutch sleeve (11) and the transmission cylinder (5), and the driving sprocket (102) drives the chain (101) and the water needle structure (2) to slide along the length direction of the crossbeam frame (10);When the mechanical drive is switched to the manual drive, the push-pull shaft (12) is first moved to drive the push-pull sleeve (13), the second sleeve (16) and the second spring (66) to move axially a certain distance in the direction toward the hand wheel (32). Since the steel ball (62) has a clamping force on the first spring (65), the first sleeve (15) remains stationary, while the second annular protrusion (161) and the second sleeve (16) move axially away from the first sleeve (15). At the same time, the reset spring (132) is compressed, and the second spring The third inclined surface (661) of (66) abuts against the bottom of the steel ball (62), and the second spring piece (66) is elastically deflected toward the axis of the clutch sleeve (11) under the guidance of the bottom of the steel ball (62). The elastic force of the second spring piece (66) and the abutment point position of the third inclined surface (661) relative to the steel ball (62) change with the movement of the second sleeve body (16). The elastic force of the second spring piece (66) pushes the steel ball (62) from the angle area between the chamfered surface (521) and the edge of the second inclined surface (652) into the sliding hole (5 2), after the steel ball (62) is separated from the chamfered surface (521), the limiting effect of the steel ball (62) on the first spring piece (65) is weakened, and then the push-pull shaft (12) is moved to drive the push-pull sleeve (13), the first sleeve body (15) and the second sleeve body (16) to move axially for a distance in the direction toward the hand wheel (32), so that the third clutch tooth (112) is separated from the first clutch tooth (311), until the fourth clutch tooth (113) is axially engaged with the second clutch tooth (321). At this time, the other group of The steel ball (62) abuts against the fourth inclined surface (662) of the second elastic piece (66), and the radial elastic force of the limit spring (63) is converted into an axial elastic force through the fourth inclined surface (662) to force the fourth clutch tooth (113) and the second clutch tooth (321) to be tightly engaged. The torque of the hand wheel (32) is sequentially transmitted to the driving sprocket (102) through the cooperation between the fourth clutch tooth (113) and the second clutch tooth (321) and the anti-rotation cooperation between the clutch sleeve (11) and the transmission cylinder (5).

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