Knob nut pressing machine

Abstract

A knob nut pressing machine comprises a knob feeding unit, a nut feeding unit and a pressing unit. The knob feeding unit comprises a knob vibrating disc, a knob conveying guide rail, a vertical vibrator, a vertical guide rail, a pushing assembly and a knob positioning assembly; the knob conveying guide rail is communicated with the knob vibration disc; the knob can be conveyed along the knob conveying guide rail; the upright vibrator is connected with the knob conveying guide rail; the vertical guide rail is located on the side, away from the knob vibration disc, of the knob conveying guide rail and provided with a containing space extending downwards in the vertical direction. The material pushing assembly is used for pushing the knob into the accommodating space; the knob positioning assembly comprises a limiting block and a centering rod; the limiting block and the centering rod extend in the horizontal direction and stretch out and draw back in the containing space. The centering rod is located over the limiting block. The pressing unit communicates with the containing space and the nut feeding unit, and the nut is pressed into the containing space. Compared with the prior art, the knob nut pressing machine can improve the automation degree of knob nut pressing work.

Description

Technical Field

[0001] The invention relates to the technical field of parts processing, in particular to a knob nut pressing machine. Background Art

[0002] Existing electrical equipment is equipped with a knob, and users can adjust various functions by turning the knob. The knob is generally mounted on other parts for easy rotation. In order to ensure the strength of the knob and reduce the production cost, the knob body is often made of plastic, and a metal nut is pressed into the place where it is connected to other parts.

[0003] Please refer to Figure 1 and Figure 2 , a common knob 100 includes a shell 100A, a nut mounting portion 100B and a handle 100C. The shell 100A is roughly cylindrical, and the nut mounting portion 100B is arranged in the shell 100A for mounting a nut 200. The nut 200 is pressed into the nut mounting portion 100B and is connected to the nut 200 axis. Preferably, a plurality of ribs are protruding from the inner wall of the nut mounting portion 100B, so that the nut 4 forms an interference fit with the shell 100A. A plurality of handles 100C are circumferentially arranged on the outer wall of the shell 100A and extend radially, and each handle 100C is separated by a certain distance in the circumferential direction for easy grasping by the user's hand. Among them, the most common number of handles 100C is more than 3.

[0004] Most of the existing knob nut pressing processes are done manually, which is not only inefficient but also has a low degree of automation. Although some knob nut pressing machines have appeared, compared with standard parts such as nuts, knobs have complex and changeable shapes and are not easy to fix. Therefore, these knob nut pressing machines can only automatically load nuts to the installation station, and the alignment and pressing of knobs and nuts still rely on manual operation, which makes it impossible to achieve fully automated production of knob nut pressing, resulting in low production efficiency of knob nut pressing. Summary of the invention

[0005] Based on this, the purpose of the present invention is to overcome the defects or shortcomings of the prior art and provide a knob nut pressing machine.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A knob nut pressing machine comprises a knob feeding unit, a nut feeding unit and a pressing unit;

[0008] The knob feeding unit comprises a knob vibration disk, a knob conveying guide rail, an upright vibrator, a vertical guide rail, a pushing assembly and a knob positioning assembly; the knob vibration disk is used to store the knob; the knob conveying guide rail is connected to the knob vibration disk so that the knob can be conveyed along the knob conveying guide rail; the upright vibrator is connected to the knob conveying guide rail; the vertical guide rail is located on a side of the knob conveying guide rail away from the knob vibration disk, and is provided with a accommodating space extending downward in a vertical direction; the pushing assembly is located on a side of the knob conveying guide rail away from the knob vibration disk, and is used to push the knob into the accommodating space; the knob positioning assembly comprises a limit block and a centering rod; the limit block and the centering rod extend in a horizontal direction and can be telescoped in and out of the accommodating space; projected in the vertical direction, the limit block is close to the middle of the accommodating space; the centering rod is located directly above the limit block;

[0009] The pressing unit is communicated with the accommodating space and the nut feeding unit respectively, and can press the nuts from the nut feeding unit into the accommodating space.

[0010] Compared with the prior art, the knob nut pressing machine of the present invention makes the knob upright and oriented in the same direction through the knob feeding unit, and then the pushing assembly pushes the upright knob into the vertical guide rail. Under the action of gravity, the knob remains upright and falls freely until it hits the limit block. The limit block and the centering rod jointly fix the knob and align it with the pressing unit. Finally, the nut from the nut feeding unit can be pressed into the knob through the pressing unit. The knob and nut are automatically fed and aligned during the whole process, thereby realizing automatic production of knob nut pressing.

[0011] In one embodiment, the knob positioning assembly also includes a spacer and a driving cylinder; the spacer is located directly above the centering rod; the driving cylinder is respectively connected to the limit block, the centering rod and the spacer, driving them to respectively extend and retract in and out of the accommodating space, and the two knobs are separated by the spacer. When the finished product is placed, the knob without a nut pressed in will also fall off, affecting each other's work.

[0012] In one embodiment, the knob feeding unit also includes a detection component, which includes the first detector, a second detection component and a third detector; the first detector is arranged on the knob conveying rail, and is used to detect whether the knob enters the knob conveying rail; the second detection component is close to the pushing component, and is used to detect whether the knob reaches the pushing component; the third detector is close to the limit block, and is used to detect whether the knob falls on the limit block. By setting the detection component to detect the movement of the knob, the accuracy of the knob feeding action is improved.

[0013] In one embodiment, the pushing assembly includes a pushing cylinder and a pushing block; the pushing block is connected to the output end of the pushing cylinder, and is provided with a first opening capable of communicating with the knob conveying guide rail and a second opening communicating with the accommodating space; projected in the vertical direction, the moving direction of the pushing block is perpendicular to the extension direction of the knob conveying guide rail, and by setting the pushing block, a single dry knob can be accurately placed into the accommodating space.

[0014] In one embodiment, the nut feeding unit includes a nut vibration plate and a nut guide rail; one end of the nut guide rail is connected to the nut vibration plate, and the other end is connected to the pressing unit to realize automatic feeding of the nuts.

[0015] In one embodiment, the nut guide rail is provided with an oblique pipe section and a straight pipe section which are connected to each other; the oblique pipe section is connected to the nut vibration plate and is inclined toward the straight pipe section relative to the horizontal plane; the straight pipe section is connected to the pressing unit, so that the nut automatically flips to a direction opposite to the knob during the conveying process.

[0016] In one embodiment, the pressing unit includes a base, a pushing cylinder, a pressing head and a blocking block; the base is connected to the vertical guide rail and is provided with a pressing channel connected to the accommodating space; the pressing channel is connected to an end of the straight pipe section away from the inclined pipe section; the blocking block is arranged on a side of the pressing channel away from the straight pipe section; the pressing head is coaxially arranged with the centering rod, and under the drive of the pushing cylinder, the pressing head approaches or moves away from the pressing channel to press the nut in the pressing channel into the knob.

[0017] In one embodiment, a defective product recovery unit is further included, and the defective product recovery unit includes a defective product recovery pipe and a pusher. When pushed by the pusher, an opening at one end of the defective product recovery pipe is pushed below the limit block and toward the limit block to realize automatic recovery of defective products.

[0018] In one embodiment, the pusher is a cylinder to simplify the structure of the defective product recovery unit.

[0019] In one embodiment, the vertical guide rail is provided with a snap-fitting portion located within the accommodating space, and the snap-fitting portion extends in a vertical direction. At least a portion of the knob can be snapped into the snap-fitting portion to achieve positioning of the knob in the accommodating space, so that the direction of the knob is not easily changed during the falling process.

[0020] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 (a) is a front view of a knob in the prior art;

[0022] Figure 1 (b) is a front view of a nut in the prior art;

[0023] Figure 2 It is a schematic diagram of the overall structure when the nut is pressed onto the knob in the prior art;

[0024] Figure 3 It is a front view of the knob nut pressing machine of the present invention;

[0025] Figure 4 It is a partial structural schematic diagram of the knob nut pressing machine of the present invention;

[0026] Figure 5 It is a schematic diagram of the overall structure of the knob feeding unit of the present invention;

[0027] Figure 6 It is a schematic diagram of the overall structure of the knob vibration plate of the present invention;

[0028] Figure 7 It is a top view of the knob vibration plate of the present invention;

[0029] Figure 8 For along Figure 6 Sectional projection diagram after sectioning along line ZZ;

[0030] Fig. 9 It is a partial projection diagram of the knob conveying guide rail of the present invention when projected along its extension direction;

[0031] Fig.10 It is a schematic diagram of the overall structure of the pusher assembly of the present invention;

[0032] Fig.11 The overall structural schematic diagram of the pusher block of the present invention;

[0033] Fig.12 A top view of the vertical guide rail of the present invention;

[0034] Fig.13 A front view of the main body of the present invention;

[0035] Fig.14 It is a schematic diagram of the overall structure of the knob positioning assembly of the present invention;

[0036] Fig.15 This is a schematic diagram of the overall structure of the knob positioning assembly after the cover body is removed according to the present invention;

[0037] Fig.16 It is a partial cross-sectional view of the knob positioning assembly of the present invention when projected along the horizontal direction;

[0038] Fig.17 It is a schematic diagram of the overall structure of the nut feeding unit of the present invention;

[0039] Fig.18 It is a schematic diagram of the overall structure of the nut guide rail of the present invention;

[0040] Fig.19 A partial cross-sectional view of the nut feeding unit of the present invention when projected along the horizontal direction;

[0041] Fig. 20 It is a schematic diagram of the overall structure of the workbench of the present invention.

[0042] Reference numerals: 10, workbench; 11, product outlet; 20, knob feeding unit; 21, knob vibration plate; 211, knob plate mounting plate; 212, plate body; 212A, knob inlet; 212B, bump; 213, knob connecting channel; 214, support rod; 215, first elastic member; 216, vibrator; 22, knob conveying guide rail; 23, upright vibrator; 231, vibration body; 232, bracket; 233, damping pad; 24, pusher assembly; 241, pusher platform; 242 , push cylinder; 243, push block; 243A, first opening; 243B, second opening; 25, vertical guide rail; 251, main body; 251A, clamping part; 251B, first press-fit opening; 251C, through hole; 252, cover; 26, knob positioning assembly; 261, limit block; 262, centering rod; 263, spacer; 264, driving cylinder; 27, detection assembly; 271, first detector; 272, second detection member; 273, third detector; 30, nut feeding unit; 31. Nut vibration plate; 32. Nut guide rail; 321. Oblique pipe section; 321A. Upper side wall; 321B. Lower side wall; 321C. Left side wall; 321D. Right side wall; 322. Straight pipe section; 322A. Vertical upper side wall; 322B. Vertical lower side wall; 322C. Vertical left side wall; 322D. Vertical right side wall; 323. Nut inlet; 40. Pressing unit; 41. Base; 411. Pressing channel; 412. Second pressing port; 42. Push cylinder; 43. Press head; 44. Stop block ; 50. Defective product recovery unit; 51. Defective product recovery pipeline; 52. Pusher; 60. Controller; 100. Knob; 100A. Shell; 100B. Nut mounting part; 100C. Handle; 200. Nut; D1: first diameter; D2: second diameter; D3, third diameter; D4, fourth diameter; H1, first thickness; H2, second thickness; H3, third thickness; L1, height inside horizontal guide rail; L2, width inside horizontal guide rail; L3, height of nut guide rail; L4, width of nut guide rail. DETAILED DESCRIPTION

[0043] In view of the defects of the prior art that the knob and nut pressing operation has a low degree of automation and great difficulty, the applicant of this case analyzed and studied the knob and nut pressing operation and found that: although the shapes of knobs are complex and varied, there are some regularities in their appearance. For example, most of them have more than three handles, and the spacing between the two handles is uniform, so the two handles can be used to position the knob.

[0044] In response to the above findings, the applicant proposed a knob nut pressing machine, which uses a knob vibration disk to allow the knob to automatically turn in a horizontal guide rail to be supported by two handles and then, under the vibration of the upright vibrator, the knob continues to move along the knob conveying guide rail toward the pushing platform connected to the knob conveying guide rail. Then, under the action of gravity, the upright knob is conveyed through the vertical guide rail and is engaged with the positioning member in the vertical guide rail. The knob can be positioned in the vertical guide rail in combination with the centering rod, thereby realizing automatic loading of the knob, and then after the automatically loaded nut is pressed onto the knob, the finished product can be unloaded, finally realizing the automated production of the knob nut pressing work. The following are some specific embodiments of the knob nut pressing machine of this application:

[0045] To Figure 1 (b) The nut 200 is pressed into Figure 1 (a) of the knob 100 of the knob nut press machine as this embodiment, wherein, please refer to Figure 1 and Figure 2 The maximum outer diameter of the knob 100 is the first diameter D1, the outer diameter of the knob 100 shell is the second diameter D2, the thickness of the knob 100 is the first thickness H1, and the first thickness H1 is smaller than the first diameter D1. The maximum outer diameter of the nut 200 is the third diameter D3, the thickness of the nut 200 is the second thickness H2, the distance between the two opposite sides of the nut 200 parallel to its axis is the third thickness H3, and the diameter of the screw hole of the nut 200 is the fourth diameter D4.

[0046] Please refer to Figure 3 and Figure 4 The knob and nut pressing machine of the present application includes a workbench 10, a knob feeding unit 20, a nut feeding unit 30, a pressing unit 40, a defective product recovery unit 50 and a controller 60. The workbench 10 has a surface parallel to a horizontal plane, the knob feeding unit 20, the nut feeding unit 30 and the pressing unit 40 are arranged above the workbench 10, the defective product recovery unit 40 is arranged below the workbench 10, and under the control of the controller 60, the knob feeding unit 20 and the nut feeding unit 30 feed the knob 100 and the nut 200 respectively, the pressing unit 40 presses the two together, and the defective product recovery unit 40 recovers the defective products.

[0047] For details, please refer to Figures 5 to 16 The knob feeding unit 20 includes a knob vibration plate 21, a knob conveying guide rail 22, an upright vibrator 23, a pushing assembly 24, a vertical guide rail 25, a knob positioning assembly 26 and a detection assembly 27.

[0048] The knob vibration disk 21 includes a knob disk mounting plate 211, a disk body 212, a knob connection channel 213, a support rod 214, a first elastic member 215 and a vibrator 216. The surface of the knob disk mounting plate 211 is parallel to the surface of the workbench 10, and the disk body 212 is arranged above the mounting plate 211. Preferably, the four corners of the knob disk mounting plate 211 are respectively provided with support rods 214 perpendicular to the surface of the workbench 10, so that the knob disk mounting plate 211 and the workbench 10 are separated by a certain distance, and the first elastic member 215 is respectively sleeved on the outside of each support rod 214, and the two ends of the first elastic member 215 are respectively in contact with the surface of the knob disk mounting plate 211 and the surface of the workbench 10 to absorb the vibration of the knob vibration disk 21. The disk body 212 is hollow inside, and the vibrator 216 is connected to the disk body 212 to make it vibrate. The top of the plate 212 away from the workbench 10 is provided with a knob inlet 212A connected to the outside, and the knob connecting channel 213 is provided on the plate 212 and connected to the knob outlet 212A. Under the vibration of the vibrator 216, the knob 100 rotates in the knob connecting channel 213 to an upright state supported by two handles. Figure 8 As shown, a protrusion 212B can be set at the knob entrance 212A according to the shape of the knob 100 to limit the swing direction of the knob 100 when entering the knob exit 212A, so that the nut mounting part in the knob 100 is oriented in the same direction in the knob connecting channel 213.

[0049] One end of the knob conveying guide rail 22 is connected to the knob outlet 212A through the knob connecting channel 213, and extends in the horizontal direction. The horizontal guide rail inner height L1 of the knob conveying guide rail 22 is greater than or equal to the first diameter D1 of the knob 100, the horizontal guide rail inner width L2 is greater than or equal to the first thickness H1 of the knob 100, and the horizontal guide rail height L1 is greater than the horizontal guide rail inner width L2, so that after each knob 100 enters the knob conveying guide rail 22, the axes are parallel to each other and arranged in sequence in the knob conveying guide rail 22 along the extension direction of the knob conveying guide rail 22, and move toward the push assembly 24 under the push of the knob 100 entering from the knob vibration plate 21. In addition, the knob conveying guide rail 22 can also be slightly inclined relative to the horizontal plane, so that the knob 100 has a tendency to slide toward the push assembly 24 under the action of gravity.

[0050] The upright vibrator 23 is connected to the knob conveying guide rail 22, so that the knob conveying guide rail 22 vibrates. In this embodiment, the upright vibrator 23 is arranged between the workbench 10 and the knob conveying guide rail 22, and the upright vibrator 23 is provided with a vibration body 231, a bracket 232 and a damping pad 233. The bracket 231 extends from the workbench 10 in a vertical direction, and the damping pad 232 is arranged between the bracket 231 and the vibration body 231 to absorb vibration, and the vibration body 231 is connected to the knob conveying guide rail 22. After the knob 100 in the knob conveying guide rail 22 is vibrated, it rotates around the axis until the two adjacent handles are connected to the inner bottom surface of the knob conveying guide rail 22. Under the vibration of the upright vibrator 23, the knob 100 continues to move along the knob conveying guide rail 22 toward the pusher assembly 24.

[0051] Please refer to Fig.10 and Fig.11 The pushing assembly 24 is located at one end of the knob conveying guide rail 22 away from the knob vibration disk 21, and includes a pushing platform 241, a pushing cylinder 242 and a pushing block 243. The pushing platform 241 is installed on the table top of the workbench 10 and is connected to one end of the knob conveying guide rail 22 away from the knob vibration disk 21. The pushing cylinder 242 is installed on one side of the pushing platform 241. Projected along the vertical direction, the moving direction of the piston rod of the pushing cylinder 242 is perpendicular to the extension direction of the knob conveying guide rail 22. The pushing block 243 is connected to the piston rod of the pushing cylinder 242. Under the drive of the pushing cylinder 242, the pushing block 243 moves linearly, and the vertical guide rail 25 is located on the moving trajectory of the pushing block 243, so that the knob 100 is pushed into the vertical guide rail 25. In this embodiment, the pusher block 243 is hollow inside and is provided with a first opening 243A connected to the knob conveying guide rail 22, and a second opening 243B facing the table top of the workbench 10 and connected to the vertical guide rail 25. The vertical guide rail 25 is located on the side of the pusher block 243 away from the pusher cylinder 242. When the pusher block 243 moves away from the pusher cylinder 242, the knob 100 is pushed into the vertical guide rail 25. It is understandable that the vertical guide rail 25 can also be installed on the side of the pusher platform 241 close to the pusher cylinder 242 and provided with a through hole. The vertical guide rail 25 is arranged below the through hole of the pusher cylinder 242. When the pusher block 243 is close to the pusher cylinder 242, the knob 100 can also be pushed into the vertical guide rail 25.

[0052] Please refer to Fig.12 and Fig.13, the vertical guide rail 25 extends in the vertical direction toward the workbench 10 and is connected to the second opening 243B. Projected in the vertical direction, the pressing unit 40 is located on the moving track of the push block 243 and is connected to the vertical guide rail 25. The knob positioning assembly 26 is located on the side of the vertical guide rail 25 away from the push assembly 24. The vertical guide rail 25 includes a main body 251 and a cover body 252. The main body 251 extends in the vertical direction. Projected in the vertical direction, the cover body 252 covers the side surface of the main body 251 facing away from the push assembly 24, and is separated from the main body 251 by a certain distance, so as to form an accommodation space for accommodating the knob 100 between the main body 251 and the cover body 252. In this embodiment, there are two covers 252. When projected in the vertical direction, in the direction perpendicular to the moving direction of the pusher block 243, the two covers 252 are symmetrically arranged on both sides of the main body 251 and separated by a certain distance, so that the situation of the knob 100 in the vertical guide rail 25 can be observed from the gap between the two covers 252 during operation. When projected in the vertical direction, the accommodating space width A of the accommodating space is greater than the first diameter D1 of the knob 100, and the extending direction of the accommodating space width A is parallel to the extending direction of the knob conveying guide rail 22. The main body 251 is provided with a clamping portion 251A on one side facing the accommodating space, and the clamping portion 251A extends at least to the knob positioning assembly 26 along the vertical direction. Projected in the vertical direction, the engaging portion 251A is located in the middle of the main body 251, the engaging portion width E is greater than or equal to the second diameter D2, and the minimum thickness B of the accommodating space is less than the first thickness H1, so that a portion of the outer shell of the knob 100 is engaged with the engaging portion 251A to achieve the positioning of the knob 100 in the accommodating space, and the extension of the minimum thickness B is parallel to the moving direction of the pusher block 243. Further, in order to make the engagement between the knob 100 and the engaging portion 251A smoother, the engaging portion first width C of the engaging portion 251A close to the pusher assembly 24 is greater than the second diameter D2, and the engaging portion second width D of the engaging portion 251A close to the knob positioning assembly 26 is less than the engaging portion first width C. The vertical guide rail 25 is provided with a first press-fit opening 251B on the side facing the press-fit unit 40, and the first press-fit opening 251B is provided for the nut 1200 to enter the knob 200.

[0053] Please refer to Figure 14 to Figure 16The knob positioning assembly 26 includes a limit block 261, a centering rod 262, a spacer 263 and a driving cylinder 264. The limit block 261, the centering rod 262 and the spacer 263 are arranged in sequence from bottom to top along the vertical direction in the vertical guide rail 25, and extend into the accommodating space. The main body 251 is provided with through holes 251C corresponding to the limit block 261, the positioning rod 272 and the spacer 263, so that the limit block 261, the centering rod 262 and the spacer 263 can be extended and retracted in and out of the accommodating space. Among them, projected along the moving direction of the push block 243, the limit block 261 is located at the bottom, and the limit block 261 is located in the middle of the vertical guide rail 25 in the horizontal direction, and is separated from the inner side wall of the accommodating space by a certain distance. When in use, the limit block 261 is engaged between two adjacent handles of the knob 100, and the outer shell of the knob 100 is located below. The limit block 261 is provided with an arc surface 261A on the side facing upward, and the diameter of the arc surface 261A is equal to the second diameter D2, so that the upper side of the limit block 261 can abut against the outer shell of the knob 100 to position the knob 100. The centering rod 262 is located directly above the limit block 261, extending along the moving direction of the push block 243, and is used to be inserted into the middle of the knob 100 along the axis of the knob 100. Projected along the moving direction of the push block 243, the axis of the centering rod 262 and the center of the arc surface 261A are located on a straight line extending in the vertical direction. In the vertical direction, the distance from the centering rod 262 to the limit block 261 can be adjusted according to the size of the knob 100. There are two spacers 263, which are protruding above the centering rod 262, and the distance between the two spacers 263 in the horizontal direction is less than the maximum distance between the two handles of the knob 100. The spacers 263 are used to separate two adjacent knobs 100 in the vertical direction in the vertical guide rail 25, so that the upper knob 100 is not affected by the operation of the lower knob 100. When the above-mentioned limit block 261, centering rod 262, and spacer 263 are used, the knob 100 located at the bottom of the vertical guide rail 25 is limited by the limit block 261 in the horizontal direction and by the limit block 261 and the centering rod 262 in the vertical direction. The bottom knob 100 is fixed in the vertical guide rail 25, and the spacer 263 separates the two knobs 100.

[0054] The driving cylinder 264 is arranged outside the accommodating space, and its output end is connected to the limit block 261, the centering rod 262 and the spacer 263 respectively, so as to drive them to extend and retract inside and outside the accommodating space. In this embodiment, there are three driving cylinders 264, which are electrically connected to the controller 60 respectively, and drive the movement of the limit block 261, the centering rod 262 and the spacer 263 respectively under the control of the controller 60. In addition, different numbers of driving cylinders 264 can also be set according to the pressing action.

[0055] The detection assembly 27 includes a first detector 271, a second detection member 272 and a third detector 273. The first detector 271 is arranged on the knob conveying guide rail 22 to detect whether the knob 100 enters the knob conveying guide rail 22. In this embodiment, the first detector 271 is an optical fiber sensor in the prior art. The knob conveying guide rail 22 is provided with facing openings on two opposite sides. The first detector 271 emitter emits light from the opening on one side to the receiver located at the opening on the other side. When the knob 100 enters the knob conveying guide rail 22, the light is blocked, thereby identifying that the knob 100 enters the knob conveying guide rail 22. The second detector 272 is arranged on the pusher block 243 or the pusher platform 241, located on the side of the pusher block 243 away from the knob conveying guide rail 22, and is used to detect whether the knob 100 enters the pusher block 243. The second detector 272 can also be an optical fiber sensor in the prior art. The third detector 273 is electrically connected to the controller 50, and is disposed on the outside of the two covers 252 and close to the stop block 261, for detecting whether the knob 100 falls onto the stop block 261. In this embodiment, the third detector 273 is a diffuse reflection optical fiber sensor in the prior art, and there are two of them, which are respectively close to the two handles of the knob 100 engaged with the stop block 261.

[0056] Please refer to Fig.17 The nut feeding unit 30 includes a nut vibration plate 31 and a nut guide rail 32. The nut vibration plate 31 is arranged on the surface of the workbench 10, and is arranged at intervals from the knob vibration plate 21, and is used to place a plurality of nuts 200 pressed into the knob 100. Similar to the knob vibration plate 21, the nut vibration plate 31 can also be vibrated by a vibrator, and supported and arranged on the workbench 10 by elastic members, etc., for shock absorption, which will not be repeated here.

[0057] Please refer to Fig.18 and Fig.19The nut vibration plate 31 is connected to the nut guide rail 32. The nut guide rail 32 is provided with an oblique pipe section 321, a straight pipe section 322 and a nut inlet 323 which are connected to each other. The nut inlet 323 is opened at one end of the oblique pipe section 321 close to the nut vibration plate 31 and faces upward.

[0058] The inclined pipe section 321 extends toward the vertical guide rail 25 in a direction inclined relative to the table surface of the workbench 10. The inclined pipe section 321 includes an upper side wall 321A and a lower side wall 321B that are parallel and spaced apart from each other and inclined relative to the table surface of the workbench 10, and a left side wall 321C and a right side wall 321D that are spaced apart and perpendicular to the horizontal plane. The distance between the upper side wall 321A and the lower side wall 321B is the nut guide rail height L3 of the nut guide rail 32. The nut guide rail height L3 is smaller than the third thickness H3 and the fourth diameter D4, and larger than the second thickness H2, so that after the nut 200 enters the inclined pipe section 321 from the nut inlet 323, the axis of the nut 200 is perpendicular to the lower side wall 321B, and the side perpendicular to its axis can fit with the lower side wall 321B and slide along the lower side wall 321B. Preferably, the distance between the left side wall 321C and the right side wall 321D is the nut guide rail width L4 of the nut guide rail 32, and the nut guide rail width L4 is less than the fourth diameter D4 and greater than or equal to the third thickness H3, so that after the nut 200 enters the inclined tube section 321, it collides with the inner wall of the inclined tube section 321 and rotates, and the side surface parallel to its axis faces the front of its sliding direction.

[0059] The straight pipe section 322 extends in the vertical direction, including a vertical upper side wall 322A and a vertical lower side wall 322B connected to the upper side wall 321A and the lower side wall 321B and perpendicular to the horizontal plane, and a vertical left side wall 322C and a vertical right side wall 322D connected to the left side wall 321C and the right side wall 321D respectively. The distance L5 between the vertical upper side wall 322A and the vertical lower side wall 322B is equal to the height L3 of the nut guide rail, and is slightly larger than the second thickness H2. After the nut 200 slides along the lower side wall 321B to the straight pipe section 322, it turns over until the axis is parallel to the horizontal plane, and then continues to slide down vertically, and is vibrated after hitting the nut 200 below. The nut 200 rotates around the axis until one side of each of the two nuts 200 parallel to the axis fits each other.

[0060] See also Fig.19The pressing unit 40 includes a base 41, a push cylinder 42, a pressure head 43 and a blocking block 44. The base 41 is installed on the surface of the workbench 10 and close to the vertical guide rail 25. A pressing channel 411 is provided in the base 41, and the pressing channel 411 extends in the vertical direction and is connected to the straight pipe section 322. The base 41 is provided with a second pressing opening 412 on the side facing the vertical guide rail 25. The second pressing opening 412 is opposite to the first pressing opening 251B and is connected to the accommodating space. The blocking block 44 is located below the pressing channel 331A to block the nut 200 sliding down. By adjusting the blocking block 44, the height of the nut 200 relative to the workbench 10 can be adjusted, so as to be aligned with knobs 100 of different sizes. The pushing cylinder 42 is installed on one side of the base 41, and its output end is connected to the pressure head 43. The pressure head 43 extends in the horizontal direction and is coaxial with the centering rod 262. Under the push of the pushing cylinder 42 , the pressing head 43 pushes the nut 200 located at the bottom out of the second pressing opening 331B, enters the first pressing opening 251B, and is pressed into the knob 100 .

[0061] See also Fig. 20 A product outlet 11 is provided on the workbench 10 , and the assembly of the knob 100 and the nut 200 after the pressing is completed falls from the product outlet 11 .

[0062] The defective product recovery unit 50 includes a defective product recovery pipe 51 and a pusher 52. The defective product recovery pipe 41 is located below the workbench 10 and is provided with a recovery port (not marked) facing the workbench 10. The pusher 42 is electrically connected to the controller 50, and its output end is connected to the defective product recovery pipe 41, and can push the defective product recovery pipe 41 toward the product outlet 11, so that the recovery port is connected to the product outlet 11. In this embodiment, the pusher 42 is a cylinder in the prior art, and its output end moves in a direction parallel to the horizontal plane.

[0063] Based on the above structure, the knob nut pressing process is described through this embodiment.

[0064] Step S10: placing the knob 100 and the nut 200 in the knob vibration plate 21 and the nut vibration plate 31 respectively, and vibrating the knob vibration plate 21 and the nut vibration plate 31 respectively.

[0065] Step S20: The knob 100 is sent to the knob pressing position of the knob feeding unit 20, including the following steps:

[0066] Step S21: after being shocked, the knob 100 enters the knob connecting channel 213 from the knob entrance 212A and is limited by the protrusion 212B, with the nut mounting portion of the knob 100 facing the pressing unit 40;

[0067] Step S22: The first detector 271 detects that the knob 100 enters the knob conveying guide rail 22 and feeds back a signal to the controller 60. Under the control of the controller 60, the upright vibrator 23 is turned on, and the knob 100 rotates until the two handles are in contact with the inner bottom surface of the knob conveying guide rail 22, and is in an upright state.

[0068] Step S23: The knob 100 enters the pushing platform 241 from the knob conveying guide rail 22, and the second detection member 272 detects that the knob 100 enters the pushing block 243 and feeds back a signal to the controller 60. Under the control of the controller 60, the pushing cylinder 242 starts, and the pushing block 243 moves toward the vertical guide rail 25.

[0069] Step S24 : the pushing block 243 is connected to the accommodation space of the vertical guide rail 25 , and the knob 100 falls from the second opening 243B into the accommodation space and falls above the limiting block 261 .

[0070] Step S25: The third detector 273 detects that the knob 100 falls onto the limit block 261 and feeds back a signal to the controller 60. Under the control of the controller 60, the driving cylinder 264 is started, and the centering rod 262 and the spacer 263 respectively enter the accommodating space and are located in the nut mounting portion of the knob 100 and above the knob 100. The knob 100 is limited at the knob pressing position of the accommodating space.

[0071] Step S30: The nut 200 is sent to the nut pressing position of the nut feeding unit 30, including the following steps:

[0072] Step S31: After being shocked, the nut 200 enters the inclined tube section 321 of the nut guide rail 32 through the nut inlet 323 and slides along it.

[0073] Step S32: the nut 200 slides to the straight pipe section 322 and then flips into the straight pipe section 322, and then slides into the pressing channel 411 of the pressing unit 40, facing the nut mounting portion of the knob 100, and the nut 200 is limited at the nut pressing position.

[0074] Step S40: Under the control of the controller 60, the pushing cylinder 42 is turned on, and the pressing head 43 pushes the nut 200 into the nut mounting portion of the knob 100 until it is tightened.

[0075] Step S50: After the pressing action is completed, the controller 60 controls the driving cylinder 264 connected to the limit block 261 and the centering rod 262, so that the limit block 261 and the centering rod 262 withdraw from the accommodating space, and the knob 100 together with the nut 200 falls directly from the product outlet 11 and leaves the knob nut press; then, under the control of the controller 60, the spacer 263 withdraws from the accommodating space to facilitate the next knob 100 to fall onto the limit block 261.

[0076] Step S60: If during the pressing process, the controller 60 detects that the driving cylinder 264 is subjected to abnormal force, it is determined that the knob 100 and the nut 200 have not completed the pressing as required, resulting in defective products, and the pusher 52 is started to connect the defective product recovery pipe 51 to the product outlet 11 to recover the defective products.

[0077] In addition, in the present embodiment, the knob 100 has three handles, but it is understandable that for knobs with different numbers, as long as the handles are arranged at uniform intervals on the periphery of the knob, automatic loading of the knob can also be achieved.

[0078] Compared with the prior art, the knob nut pressing machine of the present invention has the following advantages:

[0079] 1. It can improve the automation degree of the knob nut pressing work and improve the work efficiency.

[0080] 2. The knob and nut have high alignment accuracy;

[0081] 3. Capable of recycling defective products.

[0082] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0083] The terms used herein are only used to describe specific embodiments and are not intended to limit the present invention. For example, the term "and / or" used herein is intended to include all possible combinations of one or more associated listed items; the singular forms "one", "an", and "the" used herein are intended to include singular forms as well as plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "including" and / or "having" used herein refer to the presence of the features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or components.

[0084] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A knob nut pressing machine, characterized in that: It includes a knob feeding unit, a nut feeding unit and a pressing unit, and the knob feeding unit includes: Knob vibration tray, used to store knobs; A knob conveying guide rail is connected to the knob vibration plate, so that the knob can be conveyed along the knob conveying guide rail; an upright vibrator connected to the knob conveying guide rail; A vertical guide rail, located on a side of the knob conveying guide rail away from the knob vibration plate, and provided with an accommodating space extending downward in a vertical direction; a pushing assembly, located at a side of the knob conveying guide rail away from the knob vibration plate, and used for pushing the knob into the accommodating space; and The knob positioning assembly comprises a limit block and a centering rod; the limit block and the centering rod extend in the horizontal direction and can be extended and retracted in and out of the accommodating space; projected in the vertical direction, the limit block is close to the middle of the accommodating space; the centering rod is located directly above the limit block; The pressing unit is communicated with the accommodating space and the nut feeding unit respectively, and can press the nuts from the nut feeding unit into the accommodating space.

2. The knob nut pressing machine according to claim 1, characterized in that: The knob positioning assembly also includes a spacer and a driving cylinder; the spacer is located directly above the centering rod; the driving cylinder is respectively connected to the limit block, the centering rod and the spacer to drive them to extend and retract in and out of the accommodating space respectively.

3. The knob nut pressing machine according to claim 2, characterized in that: The knob feeding unit also includes a detection component, which includes the first detector, a second detection component and a third detector; the first detector is arranged on the knob conveying guide rail, and is used to detect whether the knob enters the knob conveying guide rail; the second detection component is close to the pushing assembly, and is used to detect whether the knob reaches the pushing assembly; the third detector is close to the limit block, and is used to detect whether the knob falls on the limit block.

4. The knob nut pressing machine according to claim 2, characterized in that: The pushing assembly includes a pushing cylinder and a pushing block; the pushing block is connected to the output end of the pushing cylinder and is provided with a first opening capable of communicating with the knob conveying guide rail and a second opening communicating with the accommodating space; projected in the vertical direction, the moving direction of the pushing block is perpendicular to the extension direction of the knob conveying guide rail.

5. The knob nut pressing machine according to claim 2, characterized in that: The nut feeding unit includes a nut vibration plate and a nut guide rail; one end of the nut guide rail is connected to the nut vibration plate, and the other end is connected to the pressing unit.

6. The knob nut pressing machine according to claim 5, characterized in that: The nut guide rail is provided with an oblique pipe section and a straight pipe section which are connected to each other; the oblique pipe section is connected to the nut vibration plate and is inclined toward the straight pipe section relative to a horizontal plane; the straight pipe section is connected to the pressing unit.

7. The knob nut pressing machine according to claim 6, characterized in that: The pressing unit includes a base, a pushing cylinder, a pressing head and a blocking block; the base is connected to the vertical guide rail and is provided with a pressing channel connected to the accommodating space; the pressing channel is connected to an end of the straight pipe section away from the inclined pipe section; the blocking block is arranged on a side of the pressing channel away from the straight pipe section; the pressing head is coaxially arranged with the centering rod, and under the drive of the pushing cylinder, the pressing head approaches or moves away from the pressing channel.

8. The knob nut pressing machine according to claim 1, characterized in that: It also includes a defective product recovery unit, which includes a defective product recovery pipe and a pusher. Under the push of the pusher, one end opening of the defective product recovery pipe is pushed below the limit block and toward the limit block.

9. The knob nut pressing machine according to claim 8, characterized in that: The pusher is a cylinder.

10. The knob nut pressing machine according to claim 1, characterized in that: The vertical guide rail is provided with a clamping portion located in the accommodating space, the clamping portion extends in a vertical direction, and at least a part of the knob can be clamped into the clamping portion.

Images