Three-wire clamping type wire feeding mechanism

Abstract

The invention discloses a three-wire clamping type wire feeding mechanism which comprises a first driving mechanism, a material pressing mechanism and a feeding mechanism, the material pressing mechanism respectively and sequentially presses three wire cutting sleeve assemblies through three material pressing ejector rods, the feeding mechanism comprises three feeding assemblies, and the three feeding assemblies respectively and sequentially convey wires to the three wire cutting sleeve assemblies. The first driving assembly drives the pressing mechanism and the feeding mechanism to act. According to the three-wire clamping type wire feeding mechanism, mutual influence of three kinds of wires in the feeding and pressing process is avoided, the three wire cutting sleeves are of the same structure and are densely arranged side by side, the three feeding assemblies of the same driving principle and the similar structure are adopted, and dense arrangement in a limited space is achieved.

Description

Technical Field

[0001] The invention relates to the field of stamping equipment, in particular to cold heading equipment or heading machines, in particular to a wire feeding mechanism in a contact cold heading machine. Background Art

[0002] During the forming process of three-composite contacts (used in electrical switches such as relays), a knife is used to cut the three required materials in sequence at the three wire supply locations at different times, collect them in the same knife cavity, and finally transport them to the contact cold heading forming location for cold heading composite forming. Since the cutter moves from the first wire supply location to the second wire supply location and then to the third wire supply location, and finally transports the materials to the contact cold heading composite forming location, the longer the cutter needs to move, the larger the size of the cam driving the cutter will be, which will easily cause the pressure angle of the cam on the cutter push rod to increase, which will cause the stress conditions of related parts to deteriorate, thus making the parts easy to damage. Therefore, a compact structure is a way to improve equipment performance.

[0003] Due to the timing requirements of the three-composite contact forming action, the feeding-related actions of the three wires must be implemented at a set time and a set position (limited space). Existing cold heading equipment generally uses a cam-driven rocker to drive the feeding slider to feed reciprocatingly, and relies on adjusting the arm length of the force fulcrum on the rocker relative to its rotating shaft to adjust the wire feeding length on the other side. The adjustment length cannot be quantified and is difficult to adjust. This feeding mechanism requires two sets of rockers to drive the feeding of one wire, and the feeding of three wires requires six sets of independent rockers to control. The structure is complex, the adjustment position of the wire feeding length is scattered, and the space for the adjustment tool is limited, making it difficult to adjust. This mechanism is affected by the swing shaft clearance of the rocker, the change in the swing arm length due to temperature rise, and the relative slide wear between the rocker head and the slot, resulting in the material feeding length being too long or too short each time, which in turn leads to unstable contact forming volume and poor contact forming quality. Summary of the invention

[0004] The purpose of the present invention is to provide a three-wire clamping wire feeding mechanism with a compact structure, which can feed three kinds of wire materials in sequence according to the timing requirements of the three-composite contact forming action, avoid the mutual influence of the three kinds of wire materials during the feeding process, and realize the accurate and stable supply of the three kinds of wire materials.

[0005] To achieve the above object, the present invention is implemented by the following technical solutions:

[0006] The present invention provides a three-wire clamping wire feeding mechanism, comprising a first driving mechanism, a material pressing mechanism, and a material feeding mechanism;

[0007] The pressing mechanism includes a pressing assembly and three tangent sleeve assemblies, the three tangent sleeve assemblies are arranged side by side along the Y-axis direction, the three tangent sleeve assemblies are used to respectively press three wires supplied by the feeding mechanism, the pressing assembly includes a pressing slider and three pressing ejector rods movably installed in the pressing slider up and down, and the three pressing ejector rods are configured to successively press the three pressing sleeve assemblies downward;

[0008] The feeding mechanism comprises a wire feeding assembly 1, a wire feeding assembly 2 and a wire feeding assembly 3, and the three feeding assemblies respectively feed wires to the three tangent sleeve assemblies; each feeding assembly comprises a feeding clamp for clamping the wire, a push rod capable of reciprocating along the X-axis, and a movable push block capable of reciprocating along the Y-axis, the first end of the push rod is connected to the feeding clamp, and the movable push block is opposite to the second end of the push rod and is used to drive the push rod to push the feeding clamp toward the pressing mechanism;

[0009] The first driving mechanism includes a driving shaft 1, a first driving cam, a pressing rocker arm, a rocker arm support and three feeding driving cams. The axial direction of the driving shaft 1 is arranged along the X-axis. The first driving cam and the three feeding driving cams are installed on the driving shaft 1. The middle part of the pressing rocker arm is hinged on the rocker arm support. The rocker arm has a first end located above the pressing assembly and a second end placed above the first driving cam. The three feeding driving cams respectively contact the movable push blocks of the three feeding assemblies to drive the three movable push blocks to move successively in the Y direction.

[0010] Preferably, each feeding assembly also includes a feed clamp reset spring seat, a third reset spring for driving the push rod to reset in a direction away from the feed clamp, a feed initial position limit block and a gasket, the gasket is detachably mounted on the feed initial position limit block, the third reset spring is mounted on the feed clamp reset spring seat, the first end of the push rod abuts against the third reset spring, and at the feed initial position, the second end of the push rod contacts the gasket.

[0011] Preferably, a push roller is installed at the second end of the push rod, and the first end of the movable push block is provided with a driving profile for slidingly contacting the push roller at the second end of the push rod to drive the corresponding push rod to approach the pressing mechanism, and the driving profile is connected to a driving end surface, and when the push roller slides to contact the driving end surface, the push rod stops approaching the pressing mechanism.

[0012] Preferably, the feed clamp comprises a feed slider, a spring support, a feed clamping block, and a clamping spring, the spring support has two vertically opposite clamping arms, the feed slider and the feed clamping block are located between the two clamping arms of the spring support, the feed clamping block is located above the feed slider and can move up and down along the Z axis, the two clamping arms of the spring support are tightly connected to the feed slider, the clamping spring is located in the spring support, and the lower end of the clamping spring is against the top surface of the feed clamping block;

[0013] The feed clamp also includes a second adjusting screw plug and a nut. The upper end of the spring support is provided with a threaded hole. The second adjusting screw plug is installed in the threaded hole and its upper end protrudes from the top surface of the spring support and is locked with a nut. The lower end of the second adjusting screw plug is against the clamping spring. By changing the depth of the second adjusting screw plug installed in the threaded hole of the spring support, the compression degree of the clamping spring can be adjusted.

[0014] A threaded hole is provided on the top surface of the feed clamping block, and the second adjusting screw plug has a through hole opposite to the threaded hole on the feed clamping block. Each feed clamp is provided with an auxiliary bolt. The auxiliary bolt is passed through the through hole of the second adjusting screw plug and the clamping spring and then screwed into the screw hole of the feed clamping block. The feed clamping block can be lifted by pulling up the auxiliary bolt.

[0015] Preferably, the feeding mechanism comprises a feeding guide rail mounting seat, three X-axis linear guide rails and three Y-axis linear guide rails, the three X-axis linear guide rails are mounted on the feeding guide rail mounting seat side by side along the Y-axis direction, the three feeding clamps are mounted on the three X-axis linear guide rails respectively, the three Y-axis linear guide rails are arranged side by side along the X-axis direction, and the three movable push blocks are mounted on the three Y-axis linear guide rails respectively;

[0016] A second return spring is installed on each movable push block. The second return spring has a first end against the movable push block and a second end against a fixed part on the device. The second return spring is used to drive the movable push block to return to a direction away from the push rod.

[0017] Preferably, it also includes a double-layer loosening mechanism, which includes a second driving shaft, a second driving cam, a clamping release slider, an upper slide plate, a lower slide plate, a fourth return spring and two Z-axis linear guide rails, the second driving cam is sleeved on the second driving shaft, a roller abutting against the second driving cam is installed below the clamping release slider, the clamping release slider is installed on the movable blocks of the two Z-axis linear guide rails, and the fourth return spring is installed on the clamping release slider;

[0018] The bottom surface of the feeding guide rail mounting seat of the feeding mechanism rests on the fourth return spring, and a follower roller is installed on each feeding clamping block. The follower roller on the wire feeding assembly 1 and the follower roller on the wire feeding assembly 3 are placed on the top surface of the upper slide plate, and the follower roller of the wire feeding assembly 2 is placed on the top surface of the lower slide plate.

[0019] Preferably, the pressing mechanism comprises a first fixed support and a guide sleeve, the first fixed support is provided with a groove for installing the guide sleeve, the three tangent sleeve assemblies are installed inside the first fixed support and below the guide sleeve, and the pressing slider is movably installed in the through hole inside the guide sleeve and can move up and down along the Z axis;

[0020] Each tangent sleeve assembly includes a tangent sleeve and a wire pressing block located above the tangent sleeve and capable of moving up and down along the Z axis. The tangent sleeve and the wire pressing block are used together to press a wire material. A wire pressing block reset spring is provided between the tangent sleeve and the wire pressing block for driving the wire pressing block to move up and reset.

[0021] Preferably, the pressing assembly also includes a slider cover, three first adjusting screw plugs and three pressing springs, the top surface of the pressing slider is provided with three countersunk holes, the upper ends of the three pressing push rods are provided with shoulders, the shoulders of the three pressing push rods are respectively placed on the bottom surfaces of the three countersunk holes, the lower ends of the three pressing push rods protrude from the bottom surface of the pressing slider and are respectively opposite to the three pressing wire blocks, the upper ends of the three countersunk holes are provided with internal threads, the three first adjusting screw plugs are provided with external threads, the three first adjusting screw plugs are respectively installed on the upper ends of the three countersunk holes through threads, a pressing spring is provided between each pressing push rod and the first adjusting screw plug above it, the slider cover is installed on the top surface of the pressing slider to close the three countersunk holes, a first return spring is installed in the pressing slider, and both ends of the first return spring respectively abut against the bottom of the groove of the slider cover and the first fixed support;

[0022] The side surface of the pressing slide block is provided with a hanging platform, and the side surface of the guide sleeve is provided with a limiting groove corresponding to the position of the hanging platform. When the hanging platform of the pressing slide block hits the bottom surface of the limiting groove of the guide sleeve, the pressing assembly stops moving up.

[0023] Preferably, the three first adjusting screws are the same, the three press rods are the same, the three press springs are the same, and the depths of the three countersunk holes on the top surface of the press slider are inconsistent so that the lengths of the lower ends of the three press rods protruding from the bottom surface of the press slider are inconsistent.

[0024] Preferably, rocker roller one and rocker roller two are respectively installed at both ends of the material pressing rocker, rocker roller two is against the first driving cam, rocker roller one is against the material pressing assembly, a spring plunger is vertically installed on the material pressing rocker, the bottom end of the spring plunger is against the rocker support, and the spring plunger is located on the side of the rocker shaft close to the material pressing assembly.

[0025] The three-wire clamping wire feeding mechanism provided by the present invention has the following beneficial effects:

[0026] 1. Three tangent sleeve assemblies are set to press three wires in sequence, and three feeding assemblies feed the three wires intermittently and successively, thereby avoiding the mutual influence of the three wires in the feeding and pressing process and improving the wire feeding accuracy.

[0027] 2. The three tangent sleeves have the same structure and are closely arranged side by side. Three feeding components with the same driving principle and similar structure are adopted to achieve close arrangement in a limited space. This makes the three-wire clamping wire feeding mechanism compact in structure and can adapt to the compact installation space of the existing cold heading equipment. It also shortens the distance that the cutter on the cold heading equipment needs to move, which is beneficial to reducing the wear of the parts of the cutter drive mechanism.

[0028] 3. All three feeding components are equipped with detachable gaskets. The initial feeding position of the push rod is controlled by changing the thickness of the gasket, and then the initial clamping position of the wire by the feeding clamp is controlled, so as to achieve precise control of the wire supply length. The adjustment of the supply amount of each wire is simple, and the influence of the wire supply adjustment amount on the equipment operation timing is eliminated, so as to achieve accurate and stable supply of the three wires during production and adjust the supply amount.

[0029] 4. The pressure of the pressing rod on the wire pressing block, as well as the pressure of the feeding clamping block on the wire, are both adjustable through springs and spring plungers. The adjustment method is simple, does not affect the feeding sequence, and is independently adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a three-wire clamping wire feeding mechanism according to an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the movement timing of some moving parts of the three-wire clamping wire feeding mechanism according to an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the assembly relationship between the pressing mechanism and the first driving mechanism.

[0033] Figure 4 It is an exploded view of the pressing mechanism;

[0034] Figure 5 is a cross-sectional view of the material pressing mechanism installed in the first fixed support;

[0035] Figure 6 It is a perspective view of the pressing mechanism;

[0036] Figure 7 is a schematic diagram of the driving profile and driving end surface of the movable push block of the wire feeding assembly;

[0037] Figure 8 is an assembly drawing of the first driving mechanism and the feeding mechanism;

[0038] Fig. 9 It is an exploded view of the wire feed assembly.

[0039] Fig.10 It is a schematic diagram of the structure of the feed clamp of the wire three-feed assembly;

[0040] Fig.11 yes Fig.10 A front view of the feed clamp;

[0041] Fig.12 yes Fig.10 A cross-sectional view of a feed clamp;

[0042] Fig.13 It is a schematic diagram of a double-layer loosening mechanism;

[0043] Fig.14 It is the assembly view of the double-layer loosening mechanism and the feeding mechanism;

[0044] Fig.15 It is a schematic diagram of the structure of the feed clamp of the wire feeding assembly;

[0045] Fig.16 yes Fig.15 Cross-sectional view of the feed clamp. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship 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 a limitation on the present invention.

[0048] like Figures 1 to 16 As shown, a three-wire clamping wire feeding mechanism includes a first driving mechanism, a material pressing mechanism, a material feeding mechanism and a double-layer material loosening mechanism.

[0049] The following introduces the structure and principle of the pressing mechanism:

[0050] The pressing mechanism includes a first fixed support 14, a pressing assembly 8, a guide sleeve 9 and three tangent sleeve assemblies 10. The pressing assembly 8 is movably installed in the guide sleeve 9 and can move up and down along the Z axis. The pressing assembly 8 includes a pressing slider 85 and three pressing push rods 84 movably installed in the pressing slider 85.

[0051] The first fixed support 14 is provided with a groove for installing the guide sleeve 9, and a vertical through hole is provided in the guide sleeve 9. The pressing slider 85 is movably installed in the through hole of the guide sleeve 9 and can move up and down along the Z axis. The three tangent sleeve assemblies 10 are installed inside the first fixed support 14 and are located below the guide sleeve 9.

[0052] Each tangent sleeve assembly 10 includes a tangent sleeve 102 and a wire pressing block 101 located above the tangent sleeve 102 and capable of moving up and down along the Z axis. The tangent sleeve 102 and the wire pressing block 101 cooperate to press a wire. The top surface of each tangent sleeve 102 is provided with a groove for accommodating the corresponding wire pressing block 101, and the side wall of the groove is provided with a through hole for a wire to extend between the tangent sleeve 102 and the wire pressing block 101. A wire pressing block reset spring 103 is provided between the tangent sleeve 102 and the wire pressing block 101 for driving the wire pressing block 101 to move up and reset.

[0053] Preferably, Figure 5 The bottom surface of the pressing block 101 is provided with a spring mounting hole for accommodating a pressing block reset spring 103. The pressing block reset spring 103 is placed in the spring mounting hole and its lower end abuts against the tangent sleeve 102 (against the top surface of the slider cover 81). The pressing mechanism presses or releases the wire 13, wire 2 12 and wire 3 11 in the three tangent sleeve assemblies 10 in the Z direction in turn.

[0054] The press assembly 8 also includes a slider cover 81, three first adjustment screw plugs 82 and three press springs 83. The top surface of the press slider 85 is provided with three countersunk holes. The upper ends of the three press push rods 84 are provided with shoulders. The shoulders of the three press push rods 84 are respectively placed on the bottom surfaces of the three countersunk holes. The lower ends of the three press push rods 84 protrude from the bottom surface of the press slider 85 and are respectively opposite to the three wire pressing blocks 101. The upper ends of the three countersunk holes are provided with internal threads. The three first adjustment screw plugs 82 are provided with external threads. The three first adjustment screw plugs 82 are respectively installed on the upper ends of the three countersunk holes through threads. There is a press spring 83 between each press push rod 84 and the first adjustment screw plug 82 above it. The slider cover 81 is installed on the top surface of the press slider 85 to close the three countersunk holes. A first return spring 86 is installed in the press slider 85. The two ends of the first return spring 86 are respectively against the bottom of the groove of the slider cover 81 and the first fixed support 14.

[0055] Preferably, the three first adjustment screw plugs 82 are the same, the three press rods 84 are the same, and the three press springs 83 are the same, so that the types of materials can be reduced and assembly errors can be reduced. The depths of the three countersunk holes are inconsistent. The countersunk hole depths of the three countersunk holes in the press slide block 85 for accommodating the three press rods 84 are H1, H2, and H3 respectively. The values ​​of H1, H2, and H3 are different, so that the lengths of the lower ends of the three press rods (84) protruding from the bottom surface of the press slide block (85) are inconsistent, so that the three press rods 84 press the corresponding wire pressing blocks 101 in a predetermined order. By adjusting the depth of the first adjustment screw plug 82 in the countersunk hole, the degree of compression of the press spring 83 can be different. Therefore, the pressure of each press rod on the wire pressing block can be adjusted separately, that is, the pressing force of the three tangent sleeve assemblies on the wire materials pressed by each can be adjusted independently without affecting each other.

[0056] The first driving mechanism drives the pressing assembly 8 to move downward along the Z axis in the guide sleeve 9. At this time, the first return spring 86 is compressed, and the three pressing rods 84 press down the three wire pressing blocks 101 respectively to press the corresponding wires respectively. When the first driving mechanism cancels the downward pressure on the pressing assembly 8, the first return spring 86 rebounds to make the pressing assembly 8 move upward, thereby loosening the three wire pressing blocks 101.

[0057] In order to limit the upward movement of the pressing assembly 8 and prevent the pressing assembly 8 from detaching upward from the guide sleeve 9, preferably, a hanging platform 851 is provided on the side surface of the pressing slider 85, and a limiting groove 91 is provided on the side of the guide sleeve 9 corresponding to the position of the hanging platform 851. When the hanging platform 851 of the pressing slider 85 hits the bottom surface of the limiting groove 91 of the guide sleeve 9, the pressing assembly 8 stops moving upward.

[0058] like Figure 1 The first driving mechanism includes a driving shaft 13, a first driving cam 2, a material pressing rocker 4, and a rocker support 1. The first driving cam 2 is mounted on the driving shaft 13. A rocker shaft 5 is mounted in the middle of the material pressing rocker 4 and is hinged to the rocker support 1 through the rocker shaft 5. Rocker rollers 15 and 27 are mounted at both ends of the material pressing rocker 4. The rocker rollers 27 are against the top of the first driving cam 2, and the rocker rollers 15 are against the top of the material pressing assembly 8. A spring plunger 6 is vertically mounted on the material pressing rocker 4, and the bottom end of the spring plunger 6 is against the rocker support 1. The spring plunger 6 is located on the side of the rocker shaft 5 close to the material pressing assembly 8. The spring plunger 6 is a standard part and can be purchased from the market.

[0059] The three tangent sleeve assemblies 10 are positioned according to the position where the cutter of the device is displaced, and the three tangent sleeve assemblies 10 are closely arranged along the Y-axis direction. Each tangent sleeve 102 is equipped with a wire pressing block 101 to transmit the clamping force of the material pressing push rod 84 on the wire material, so as to clamp the wire material in the tangent sleeve 102, and is also equipped with a set of wire pressing block reset springs 103. When the material pressing assembly 8 moves in the Z direction until the material pressing push rod 84 retracts into the first fixed support 14 (or leaves the wire pressing block 101), the wire pressing block reset spring 103 pushes up the wire pressing block 101 in the Z direction.

[0060] When the device is running, Figure 2During the time period t3 to t12 shown, the driving shaft 13 drives the first driving cam 2 to make the pressing rocker 4 rotate around the rocker shaft 5, and the rocker roller 2 7 at the front end of the pressing rocker 4 swings downward, at which time the spring plunger 6 is compressed, and when the rocker roller 2 7 contacts the slider cover plate 81 of the pressing assembly 8, the pressing assembly 8 slides downward along the inner hole of the guide sleeve 9, and the first return spring 86 is compressed. During the time period t3 to t4, the wire pressing block 101 corresponding to the wire 13 is pressed by the pressing push rod 84 to clamp the wire 13, and at the same time, the wire pressing block return spring 103 is compressed, and during the time period t4 to t7, the wire 13 is clamped, and the wire 2 12 and the wire 3 11 are in a loose state in the cutting sleeve assembly 10;

[0061] The equipment continues to run. In the time period from t7 to t8, the wire pressing block 101 corresponding to the wire 2 12 is pressed by the material pressing push rod 84 to clamp the wire 2 12. At the same time, the wire pressing block reset spring 103 is compressed. In the time period from t7 to t11, the clamping force acting on the wire 1 13 increases. The wire 1 13 and the wire 2 12 are in a compressed state in the tangent sleeve assembly 10, and the wire 3 11 is in a loose state in the tangent sleeve assembly 10.

[0062] The equipment continues to run. During the time period from t11 to t12, the wire pressing block 101 corresponding to the wire 3 11 is pressed by the material pressing push rod 84 to clamp the wire 3 11. At the same time, the wire pressing block reset spring 103 is compressed. During the time period from t11 to t19, the clamping force acting on the wire 1 13 and the wire 2 12 increases. The wire 1 13, the wire 2 12 and the wire 3 11 are all in a compressed state in the wire cutting sleeve assembly 10.

[0063] The equipment continues to operate. In the time period from t19 to t20, the contact point between the first driving cam 2 and the pressing rocker 4 changes from the outermost diameter to the innermost diameter. Under the action of the spring plunger 6 (the spring plunger rebounds to drive the pressing rocker 4 to rotate), the rocker roller 7 of the pressing rocker 4 swings upward. Under the action of the first reset spring 86, the pressing assembly 8 moves upward along the inner hole of the guide sleeve 9. The three pressing push rods 84 completely detach from the upper surfaces of the three pressing blocks 101 in turn and retract into the first fixed support 14. At the same time, the pressing block reset springs 103 in the three tangent sleeve assemblies 10 lift the pressing blocks 101. At this time, the pressing mechanism completely releases the clamping action on the three wire materials, providing the necessary conditions for the next feeding of the feeding clamp.

[0064] The following introduces the structure and operating principle of the feeding mechanism:

[0065] like Figure 8The feeding mechanism includes a feeding guide rail mounting seat 20 and three feeding assemblies. The feeding guide rail mounting seat 20 is mounted on the equipment. Three X-axis linear guide rails 2315 arranged side by side along the Y-axis direction are mounted on the feeding guide rail mounting seat 20. The three feeding assemblies are respectively a wire material one feeding assembly 24, a wire material two feeding assembly 23 and a wire material three feeding assembly 22. The wire material one feeding assembly 24 is used to convey the wire material one 13, the wire material two feeding assembly 23 is used to convey the wire material two 12, and the wire material three feeding assembly 22 is used to convey the wire material three 11. The three feeding assemblies respectively perform intermittent clamping and feeding actions on the wire material three 11, the wire material two 12 and the wire material one 13 in the X-axis direction.

[0066] like Fig. 9 Each feeding assembly includes a feeding clamp, a push rod 2312, a movable push block 232 and a Y-axis linear guide 233. The first end of the push rod 2312 is rotatably connected to the feeding clamp through a hinge pin 2314, and a push roller 2310 is installed on the second end of the push rod 2312. The feeding clamps of the three feeding assemblies are respectively installed on the three X-axis linear guides 2315, and the three movable push blocks 232 are respectively installed on the three Y-axis linear guides 233. The first driving mechanism drives the three movable push blocks 232 to move successively along the positive direction of the Y axis (towards the push block), and the three movable push blocks 232 respectively drive the three push rods 2312 to push the three feeding clamps successively along the positive direction of the X axis (towards the pressing mechanism). The three feeding clamps are respectively installed on the three X-axis linear guides, and the three X-axis linear guides are installed on the feeding guide mounting seat 20, so as to ensure that the feeding line reference planes of the three feeding clamps are located in the same horizontal plane.

[0067] like Figure 7 The first end of the movable push block 232 is provided with a driving profile 2324 for slidingly contacting the pushing roller 2310 at the second end of the corresponding push rod 2312 to drive the corresponding push rod 2312 to move along the positive direction of the X-axis. The driving profile 2324 is connected with a driving end surface 2325. When the pushing roller 2310 slides to contact the driving end surface 2325, the push rod 2312 stops moving along the positive direction of the X-axis (stops approaching the pressing mechanism).

[0068] like Figure 8 and Fig. 9 , three feeding drive cams 231 are installed on the driving shaft 13 of the first driving mechanism, and the three feeding drive cams 231 are used to push the movable push blocks 232 of the three feeding components to move in the positive direction along the Y axis. A second return spring 234 is installed on each movable push block 232, and the second return spring 234 has a first end that abuts on the movable push block 232 and a second end that abuts on a fixed part on the device. The fixed part is, for example, Figure 1 The second fixed support 39 or other parts on the device that cannot move.

[0069] like Figure 8 Each feeding assembly also includes a feeding clamp reset spring seat 21, a feeding initial position limit block 238, and a gasket 239. The gasket 239 is detachably mounted on the feeding initial position limit block 238. A third reset spring 2313 is mounted in the feeding clamp reset spring seat 21. The push rod 2312 has a first end that abuts against the third reset spring 2313 and a second end that contacts the gasket 239 at the feeding initial position. The third reset spring 2313 abuts against the first end of the push rod 2312 to provide a force to the push rod 2312 in the negative X-axis direction (away from the direction of the pressing mechanism). By replacing the gasket 239 of different thicknesses, the initial position of the push rod 2312 can be adjusted, thereby achieving quantitative adjustment of the wire supply length.

[0070] refer to Figures 10 to 12 The feeding clamp of the three feeding components of the wire material and Fig.15 and Fig.16 The feed clamp of the second wire feeding assembly. The feed clamp includes a feed slider 2317, a spring support 2318, a feed clamping block 2322, a second adjustment screw plug 2319, a clamping spring 2321 and a nut 2320. The spring support 2318 has two vertically opposite clamping arms, the feed slider 2317 and the feed clamping block 2322 are located between the two clamping arms of the spring support 2318, the feed clamping block 2322 is located above the feed slider 2317 and can move up and down along the Z axis, and the two clamping arms of the spring support 2318 are fastened to the feed slider 2317 through the second hinge pin 2316.

[0071] The clamping spring 2321 is located in the spring support 2318 and the lower end of the clamping spring 2321 is against the top surface of the feeding clamping block 2322. The upper end of the spring support 2318 is provided with a threaded hole. The second adjusting screw plug 2319 is installed in the threaded hole and its upper end protrudes from the top surface of the spring support 2318 and is locked with a nut 2320. The lower end of the second adjusting screw plug 2319 is against the clamping spring 2321. By changing the depth of the second adjusting screw plug 2319 installed in the threaded hole of the spring support 2318, the compression degree of the clamping spring 2321 can be adjusted. Through the relative position of the second adjusting screw plug 2319 relative to the spring support 2318, after tightening the nut 2320, the clamping spring 2321 can apply a suitable wire clamping force to the feeding clamping block 2322.

[0072] The top surface of the feed clamping block 2322 is provided with a threaded hole, and the second adjusting screw plug 2319 has a through hole opposite to the threaded hole on the feed clamping block 2322. An auxiliary bolt (not shown) passes through the through hole of the second adjusting screw plug 2319 and the clamping spring 2321 and is screwed into the screw hole of the feed clamping block 2322. The feed clamping block 2322 can be lifted by pulling up the auxiliary bolt, so that the wire can be inserted into the cutting sleeve assembly 10. After the auxiliary bolt is removed, the feed clamping block 2322 moves downward under the action of the clamping spring 2321 and is configured with the feed slider 2317 to clamp the wire between the two. The feed clamping block 2322 can only move up and down along the guide shape of the spring support 2318 in the Z direction, and is fixed relative to the feed slider 2317 in the X and Y directions.

[0073] The wire feeding assembly 1 24, the wire feeding assembly 23 and the wire feeding assembly 3 22 are three sets of independently driven components with the same structural principle and similar appearance. Taking the wire feeding assembly 23 as an example, its structural decomposition diagram is as follows: Fig. 9 As shown, the wire feeding assembly 2 is driven by the driving shaft 13 to drive the feeding driving cam 231 to rotate, thereby pushing the movable push block 232 to move along the Y-axis linear guide 233 to the negative Y direction, and the second return spring 234 is compressed. The front end of the push rod 2312 is connected to the feeding slider 2317 of the feeding clamp through the first hinge pin 2314. When the driving profile 2324 at the front end of the movable push block 232 hits the pushing roller 2310 of the push rod 2312, the push rod 2312 drives the feeding clamp to move along the X-axis linear guide 2315 to the X direction, and the third return spring 2313 is compressed. When the pushing roller 2310 reaches the driving end surface of the front end of the movable push block 232, the feeding clamp completes the feeding action.

[0074] When the equipment continues to rotate, the contact point between the feed drive cam 231 and the movable push block 232 is converted from the outermost diameter to the inner side, and the movable push block 232 is reset to the Y direction along the Y-axis linear guide 233 under the action of the second reset spring 234. At this time, the push rod 2312 pulls the feed clamp to reset to the negative X direction along the X-axis linear guide 2315 under the action of the third reset spring 2313, and the contact position between the push roller 2310 and the front end of the movable push block 232 moves from the drive termination surface 2325 to the drive contour 2324 until the end surface 2311 of the push rod 2312 hits the feed initial position limit block 238, and the feed clamp completes the reset action.

[0075] In order to make the feeding clamping block of the feeding mechanism clamp or loosen the wire as required, the clamping wire feeding mechanism also includes a double-layer loosening mechanism. The structure and principle of the double-layer loosening mechanism are introduced as follows:

[0076] like Fig.13The double-layer loosening mechanism includes a second driving shaft 30, a second driving cam 31, a clamping release slider 32, three equal-height force transmission rods 33, four connected equal-height pads 35, an upper slide 36, a lower slide 34, a fourth reset spring 38 and two Z-axis linear guides 37. The second driving cam 31 is sleeved on the second driving shaft 30, and a roller resting on the second driving cam 31 is installed under the clamping release slider 32. The three equal-height force transmission rods 33 are fixedly installed on the clamping release slider 32, the lower slide 34 is installed on the three equal-height force transmission rods 33, four connected equal-height pads 35 are installed on the lower slide 34, the upper slide 36 is installed on the four connected equal-height pads 35, and two Z-axis linear guides 37 are vertically installed on the equipment. The clamping release slider 32 is installed on the movable blocks of the two Z-axis linear guides 37, and the fourth reset spring 38 is installed on the clamping release slider 32.

[0077] The assembly position relationship between the double-layer loosening mechanism and the feeding mechanism is as follows Fig.14 As shown, the bottom surface of the feed guide rail mounting seat 20 is against the fourth return spring 38, and a follower roller 2323 is installed on each feed clamping block. The follower roller 2323 on the wire feeding assembly 24 and the follower roller 2323 of the wire feeding assembly 22 are placed on the top surface of the upper slide plate 36, and the follower roller 2323 of the wire feeding assembly 23 is placed on the top surface of the lower slide plate 34.

[0078] When the driving shaft 2 30 drives the second driving cam 31 to rotate, the second driving cam 31 pushes the clamping slider 32 to move upward along the Z-axis linear guide 37, the fourth reset spring 38 is compressed, and the lower slide plate 34 lifts the follower roller 2323 of the wire 2 feeding assembly 23, so that the feeding clamping block 2322 releases the wire 2 12, and the clamping spring 2321 of the wire 2 feeding assembly 23 is compressed; at the same time, the upper slide plate 36 lifts the follower roller 2323 of the wire 1 feeding assembly 24 and the wire 3 feeding assembly 22, so that the feeding clamping blocks 2322 of the wire 1 feeding assembly 24 and the wire 3 feeding assembly 22 respectively release the wire 13 and the wire 3 11, and at this time, the clamping spring 2321 of the wire 1 feeding assembly 24 and the wire 3 feeding assembly 22 are compressed.

[0079] The upper slide plate 36 and the lower slide plate 34 are provided with a hollow structure to make way for the three feed clamps to reciprocate along the X axis. When the feed mechanism is reset, the three feed clamps can move unhindered in the double-layer loosening mechanism, the follower rollers 2323 on the wire material one feed assembly 24 and the wire material three feed assembly 22 roll on the upper surface of the upper slide plate 36, and the follower roller 2323 on the wire material two feed assembly 23 rolls on the upper surface of the lower slide plate 34, keeping all the feed clamping blocks lifted, so that when the feed mechanism is reset, the three feed clamps do not clamp the three wires.

[0080] When the feeding mechanism completes the reset, the contact position of the second driving cam 31 and the clamping release slider 32 changes from the outermost diameter of the second driving cam 31 to the innermost diameter, and the clamping release slider 32 is reset downward along the Z-axis linear guide 37 under the action of the fourth reset spring 38, and the upper slide 36 and the lower slide 34 are separated from the follower roller 2323 on each feeding clamping block in the Z-axis direction, and each feeding clamping block starts to clamp its own wire again under the action of the clamping spring 2321.

[0081] Preferably, Fig.11 Size A1, Fig.16 Size A2 and Fig.14 The dimension P in satisfies the relationship A1-A2=P.

[0082] The following describes the use of the three-wire clamping wire feeding mechanism:

[0083] When in use, when the device is running in the time period from t1 to t2, the wires 11, 12, 13 are inserted into the respective through holes of the second fixed support 39, and the wires 11, 12, 13 are inserted into the respective through holes of the second fixed support 39 with auxiliary bolts. Fig.12 The through hole of the second adjusting screw plug 2319 shown is screwed onto the threaded hole of the feed clamping block 2322, and then the feed clamping block 2322 is lifted to insert the wire into the cutting sleeve assembly 10. After the auxiliary bolt is removed, the corresponding feed clamping block 2322 clamps the wire 11.

[0084] Similarly, after the three wires are inserted into the corresponding positions of the tangent sleeve assembly 10, the three feeding clamping blocks 2322 clamp the corresponding wires. The gasket 239 for controlling the feeding amount of the three wires each time and the feeding initial position limit block 238 are respectively inserted into the second fixed support 39 and tightened, so as to obtain the feeding initial positions of the three wire feeding assemblies.

[0085] like Figure 2 In the time period shown, during the time period t1 to t2, the wire feeding assembly 24, under the push of the feeding drive cam 231, feeds the wire 13 in the X direction by a corresponding amount according to the thickness of the gasket 239, and remains stationary during the time period t2 to t15. During the time period t3 to t4 after the wire feeding assembly 24 completes the feeding action, the pressing push rod 84 presses the wire pressing block 101, and the wire pressing block 101 and the tangent sleeve 102 clamp the wire 13, and maintain a continuous clamping state during the time period t4 to t19. The equipment continues to operate, and the cutting knife of the equipment moves from the position of the tangent sleeve assembly 10 of the wire 13 to the position of the tangent sleeve assembly 10 where the wire 2 is located in the time period t4 to t5, and remains stationary during the time period t5 to t8.

[0086] At the same time, during the time period from t5 to t6, the wire feeding assembly 23, under the push of the feeding driving cam 231, feeds the wire 2 12 in the direction of the pressing mechanism in a corresponding amount according to the thickness of the gasket 239, and remains stationary during the time period from t4 to t15. During the time period from t7 to t8 after the wire feeding assembly 23 completes the feeding action, the pressing push rod 84 presses the wire pressing block 101, and the wire pressing block 101 and the tangent sleeve 1021 clamp the wire 2 12, and maintain a continuous clamping state during the time period from t8 to t19. The equipment continues to operate, and the cutting knife of the equipment moves from the position of the tangent sleeve assembly 10 of the wire 2 12 to the position of the tangent sleeve assembly 10 where the wire 3 11 is located along the negative Y direction during the time period from t8 to t9, and remains stationary during the time period from t9 to t12.

[0087] At the same time, during the time period from t9 to t10, the wire three feeding assembly 22, driven by the feeding drive cam 231, feeds the wire three 11 in the X direction by a corresponding amount according to the thickness of the gasket 239, and remains stationary during the time period from t10 to t15. During the time period from t11 to t12 after the wire three feeding assembly 22 completes the feeding action, the pressing push rod 84 presses the wire pressing block 101, and the wire pressing block 101 and the wire cutting sleeve 102 clamp the wire three 11, and maintain a continuous clamping state during the time period from t12 to t19. The equipment continues to operate, and the equipment's cutter completes the remaining actions during the time period from t12 to t20 and returns to the position of the wire cutting sleeve assembly 10 where the wire one 13 is located, and remains stationary during the time period from t1 to t3 of the next cycle.

[0088] Depend on Figure 2 It can be seen that during the time period from t12 to t19, the pressing mechanism has pressed the three wires into the tangent sleeve assembly 10. Therefore, during the time period from t13 to t14, the double-layer loosening mechanism, driven by the device driving shaft 2 30, and the second driving cam 31 drives the double-layer loosening mechanism to lift the feeding clamping blocks of the three wire feeding assemblies, and the three wires in the three feeding assemblies are released. The feeding assemblies are kept released from the wires during the time period from t14 to t17, providing necessary conditions for the resetting action of the feeding mechanism.

[0089] same Figure 2 It can be seen that in the time period from t15 to t16, under the action of the third reset spring 2313, the three wire feeding assemblies return from the feeding end position along the negative X direction to their respective feeding initial positions; the equipment continues to operate, and in the time period from t17 to t18, the double-layer loosening mechanism cancels the lifting of the feeding clamping block 2322 under the action of the fourth reset spring 38, and the three feeding clamping blocks 2322 respectively clamp the wires in the feeding assembly again under the action of the corresponding clamping springs 2321;

[0090] The equipment continues to run. During the time period from t19 to t20 after the feeding assembly clamps the wire, under the action of the spring plunger 6, the rocker roller 7 swings upward and disengages from the pressing assembly 8. Under the action of the first return spring 86 and the wire pressing block return spring 103, the pressing push rod 84 retracts to the first fixed support 14, and each wire pressing block 101 disengages from the three wires in the cutting sleeve assembly 10. The pressing assembly 8 opens and keeps the wire in a loose state during the time period from t1 to t3 of the next cycle, preparing for the next feeding action.

[0091] As described above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements do not deviate the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Claims

1. A three-wire clamping wire feeding mechanism, characterized in that: It includes a first driving mechanism, a material pressing mechanism, and a material feeding mechanism; The pressing mechanism comprises a pressing assembly (8) and three tangent sleeve assemblies (10), the three tangent sleeve assemblies (10) are arranged side by side along the Y-axis direction, the three tangent sleeve assemblies are used to respectively press three wire materials supplied by the feeding mechanism, the pressing assembly (8) comprises a pressing slider (85) and three pressing push rods (84) movably installed in the pressing slider (85) up and down, and the three pressing push rods are configured to press the three pressing sleeve assemblies downward successively; The feeding mechanism comprises a wire feeding assembly (24), a wire feeding assembly (23) and a wire feeding assembly (22), and the three feeding assemblies respectively feed wires for three tangent sleeve assemblies; each feeding assembly comprises a feeding clamp for clamping the wire, a push rod (2312) capable of reciprocating along the X-axis, and a movable push block (232) capable of reciprocating along the Y-axis, the first end of the push rod (2312) being connected to the feeding clamp, and the movable push block (232) being opposite to the second end of the push rod (2312) and being used to drive the push rod to push the feeding clamp toward the material pressing mechanism; The first driving mechanism comprises a driving shaft (3), a first driving cam (2), a material pressing rocker (4), a rocker support (1) and three material feeding driving cams (231). The axial direction of the driving shaft (3) is arranged along the X-axis. The first driving cam (2) and the three material feeding driving cams (231) are mounted on the driving shaft (3). The middle part of the material pressing rocker (4) is hinged on the rocker support (1). The rocker has a first end located above the material pressing assembly and a second end located above the first driving cam (2). The three material feeding driving cams (231) respectively contact the movable push blocks (232) of the three material feeding assemblies to drive the three movable push blocks (232) to move successively in the Y direction.

2. The three-wire clamping wire feeding mechanism according to claim 1 is characterized in that: Each feeding assembly also includes a feeding clamp reset spring seat (21), a third reset spring (2313) for driving the push rod (2312) to reset in a direction away from the feeding clamp, a feeding initial position limit block (238) and a gasket (239), wherein the gasket (239) is detachably mounted on the feeding initial position limit block (238), the third reset spring (2313) is mounted on the feeding clamp reset spring seat (21), the first end of the push rod (2312) abuts against the third reset spring (2313), and at the feeding initial position, the second end of the push rod (2312) contacts the gasket (239).

3. The three-wire clamping wire feeding mechanism according to claim 1 is characterized in that: A pushing roller (2310) is installed at the second end of the push rod (2312), and a driving profile (2324) is provided at the first end of the movable push block (232) for slidingly contacting the pushing roller (2310) at the second end of the push rod (2312) to drive the corresponding push rod (2312) to approach the pressing mechanism. The driving profile (2324) is connected to a driving end surface (2325). When the pushing roller (2310) slides to contact the driving end surface (2325), the push rod (2312) stops approaching the pressing mechanism.

4. The three-wire clamping wire feeding mechanism according to claim 1 is characterized in that: The feeding clamp comprises a feeding slider (2317), a spring support (2318), a feeding clamping block (2322), and a clamping spring (2321); the spring support (2318) has two vertically opposite clamping arms; the feeding slider (2317) and the feeding clamping block (2322) are located between the two clamping arms of the spring support (2318); the feeding clamping block (2322) is located above the feeding slider (2317) and can move up and down along the Z axis; the two clamping arms of the spring support (2318) are fastened to the feeding slider (2317); the clamping spring (2321) is located in the spring support (2318) and the lower end of the clamping spring (2321) is against the top surface of the feeding clamping block (2322); The feeding clamp also includes a second adjusting screw plug (2319) and a nut (2320). The upper end of the spring support (2318) is provided with a threaded hole. The second adjusting screw plug (2319) is installed in the threaded hole and its upper end protrudes from the top surface of the spring support (2318) and is locked with the nut (2320). The lower end of the second adjusting screw plug (2319) is against the clamping spring (2321). By changing the depth of the second adjusting screw plug (2319) installed in the threaded hole of the spring support (2318), the compression degree of the clamping spring (2321) can be adjusted. A threaded hole is provided on the top surface of the feed clamping block (2322), and the second adjusting screw plug (2319) has a through hole opposite to the threaded hole on the feed clamping block (2322). Each feed clamp is provided with an auxiliary bolt. The auxiliary bolt is passed through the through hole of the second adjusting screw plug (2319) and the clamping spring (2321) and then screwed into the screw hole of the feed clamping block (2322). The feed clamping block (2322) can be lifted by pulling up the auxiliary bolt.

5. The three-wire clamping wire feeding mechanism according to claim 1 or 4, characterized in that: The feeding mechanism comprises a feeding guide rail mounting seat (20), three X-axis linear guide rails (2315) and three Y-axis linear guide rails (233); the three X-axis linear guide rails (2315) are mounted on the feeding guide rail mounting seat (20) in parallel along the Y-axis direction; three feeding clamps are respectively mounted on the three X-axis linear guide rails (2315); the three Y-axis linear guide rails (233) are arranged in parallel along the X-axis direction; and three movable push blocks (232) are respectively mounted on the three Y-axis linear guide rails (233); A second return spring (234) is installed on each movable push block (232), and the second return spring (234) has a first end that abuts against the movable push block (232) and a second end that abuts against a fixed part on the device. The second return spring (234) is used to drive the movable push block (232) to return to a direction away from the push rod (2312).

6. The three-wire clamping wire feeding mechanism according to claim 5, characterized in that: It also includes a double-layer loosening mechanism, which includes a second driving shaft (30), a second driving cam (31), a clamping release slider (32), an upper slide plate (36), a lower slide plate (34), a fourth reset spring (38) and two Z-axis linear guide rails (37), the second driving cam (31) is sleeved on the second driving shaft (30), a roller abutting against the second driving cam (31) is installed below the clamping release slider (32), the clamping release slider (32) is installed on the movable blocks of the two Z-axis linear guide rails (37), and the fourth reset spring (38) is installed on the clamping release slider (32); The bottom surface of the feeding guide rail mounting seat (20) of the feeding mechanism rests on the fourth return spring (38), and a follower roller (2323) is installed on each feeding clamping block (2322). The follower roller (2323) on the wire feeding assembly (24) one and the follower roller (2323) on the wire feeding assembly (22) three are placed on the top surface of the upper slide plate (36), and the follower roller (2323) on the wire feeding assembly (23) two is placed on the top surface of the lower slide plate (34).

7. The three-wire clamping wire feeding mechanism according to claim 1, characterized in that: The material pressing mechanism comprises a first fixed support (14) and a guide sleeve (9), the first fixed support (14) is provided with a groove for installing the guide sleeve (9), three tangent sleeve assemblies (10) are installed inside the first fixed support (14) and below the guide sleeve (9), and the material pressing slider (85) is movably installed in a through hole inside the guide sleeve (9) and can move up and down along the Z axis; Each tangent sleeve assembly (10) comprises a tangent sleeve (102) and a wire pressing block (101) located above the tangent sleeve (102) and capable of moving up and down along the Z axis. The tangent sleeve (102) and the wire pressing block (101) cooperate to press a wire material. A wire pressing block reset spring (103) is provided between the tangent sleeve (102) and the wire pressing block (101) for driving the wire pressing block (101) to move upward and reset.

8. The three-wire clamping wire feeding mechanism according to claim 7, characterized in that: The pressing assembly (8) further comprises a slider cover plate (81), three first adjusting screw plugs (82) and three pressing springs (83); the top surface of the pressing slider (85) is provided with three countersunk holes; the upper ends of the three pressing push rods (84) are provided with shoulders; the shoulders of the three pressing push rods (84) are respectively placed on the bottom surfaces of the three countersunk holes; the lower ends of the three pressing push rods (84) protrude from the bottom surface of the pressing slider (85) and are respectively opposite to the three pressing wire blocks (101); the upper ends of the three countersunk holes are provided with internal threads; the three first adjusting screw plugs (82) are provided with internal threads; the three first adjusting screw plugs (83) are provided with internal threads; the three first adjusting screw plugs (84) are provided with internal threads; the three first adjusting screw plugs (82 ... 82) is provided with external threads, three first adjustment screw plugs (82) are respectively installed on the upper ends of the three countersunk holes through threads, a pressing spring (83) is provided between each pressing push rod (84) and the first adjustment screw plug (82) above it, the slider cover plate (81) is installed on the top surface of the pressing slider (85) to close the three countersunk holes, and a first return spring (86) is installed in the pressing slider (85), and the two ends of the first return spring (86) are respectively against the bottom of the groove of the slider cover plate (81) and the first fixed support (14); A hanging platform (851) is provided on the side surface of the material pressing slide block (85), and a limiting groove (91) is provided on the side surface of the guide sleeve (9) at a position corresponding to the hanging platform (851). When the hanging platform (851) of the material pressing slide block (85) touches the bottom surface of the limiting groove (91) of the guide sleeve (9), the material pressing assembly (8) stops moving upward.

9. The three-wire clamping wire feeding mechanism according to claim 8, characterized in that: The three first adjusting screw plugs (82) are identical, the three pressing push rods (84) are identical, the three pressing springs (83) are identical, and the depths of the three countersunk holes on the top surface of the pressing slide block (85) are inconsistent so that the lengths of the lower ends of the three pressing push rods (84) protruding from the bottom surface of the pressing slide block (85) are inconsistent.

10. The three-wire clamping wire feeding mechanism according to claim 1, characterized in that: The two ends of the material pressing rocker (4) are respectively provided with a rocker roller 1 (15) and a rocker roller 2 (7), the rocker roller 2 (7) is against the first driving cam (2), the rocker roller 1 (15) is against the material pressing assembly (8), a spring plunger (6) is vertically provided on the material pressing rocker (4), the bottom end of the spring plunger (6) is against the rocker support (1), and the spring plunger (6) is located on the side of the rocker shaft (5) close to the material pressing assembly (8).

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