Automatic feeding mechanism for spring bar stock

Abstract

This invention belongs to the field of automatic spring bar material feeding technology, and discloses an automatic spring bar material feeding mechanism. The specific technical solution is as follows: it includes a feeding device, with multiple translation devices arranged at equal intervals on one side of the feeding device and multiple dropping devices arranged at equal intervals on the other side of the feeding device. Multiple guide devices are arranged on the main support, and a guide support is provided on the main support. A tail adjustment device is movably provided on the feeding device. The tail adjustment device can make linear reciprocating motion along the rack on the guide support. The spring bar material is stably clamped by the cooperation of two jaws. The clamping angle of the spring bar material is determined by monitoring the opening distance of the two jaws. If the clamping position is appropriate, the material can be directly fed and flattened. If the clamping position is inappropriate, it can be directly rotated 90 degrees to achieve the required clamping angle, and then fed and flattened again. The positioning is fast and convenient, without manual adjustment, and can adapt to the processing of straight or cross-shaped bar materials, with a high degree of automation.

Description

Technical Field

[0001] This invention belongs to the field of automatic spring bar material conveying technology, specifically relating to an automatic spring bar material supply mechanism applied to a flattening machine. Background Technology

[0002] Spring rods are cylindrical. If these cylindrical rods are directly rolled into springs, the resulting spring ends will be uneven. The formed springs will then require end-face machining, which involves significant grinding, wasting material and resulting in poor spring quality. The current main technique involves cutting the rod to the required length, heating both ends, and flattening the ends into a rectangular cross-section with gradually decreasing dimensions before winding it into a spring shape. The flattened spring rod facilitates alignment of the spring ends with the spring axis during rolling, reducing subsequent grinding and saving material.

[0003] Currently, there are two main shape requirements for spring bar processing. One is a straight bar, where the ends of the bar are processed into a rectangular structure with the two rectangular ends at the same angle relative to the center of the bar, meaning that the long sides of both ends are in approximately the same plane, and the short sides of both ends are also in approximately the same plane. The other is a cross-shaped bar, where the ends of the bar are processed into a rectangular structure with the two rectangular ends arranged perpendicularly, meaning that the long sides of both ends are approximately perpendicular, and the short sides of both ends are also approximately perpendicular.

[0004] In existing publicly available flattening machines, when manufacturing the aforementioned spring bar stock, one end of the spring is first flattened, then the spring bar stock is clamped and the unflattened end is fed into the flattening mechanism. Since there is no professional angle adjustment mechanism, the angle of the spring bar stock in the clamping mechanism is mostly adjusted by manual visual identification to control the relative angle of the two ends after flattening. This control method has poor precision and it is even more difficult to determine whether it can be processed into a straight or cross shape. For some precision springs, there are strict requirements for the forming angle after flattening both ends. Therefore, the current equipment cannot achieve accurate and fast bar stock positioning, and there is an urgent need for a fast automatic feeding and tail adjustment device for spring bar stock. Summary of the Invention

[0005] To address the technical problems existing in the prior art, the present invention provides an automatic feeding mechanism for spring bars, which can quickly adjust the angle of the bars and complete the automatic feeding.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an automatic feeding mechanism for spring bars, including a feeding device, a plurality of translation devices arranged on one side of the feeding device, a plurality of dropping devices arranged on the other side of the feeding device, and a tail adjustment device movably provided on the feeding device.

[0007] The tail adjustment device includes a housing body and two symmetrically arranged grippers. The rear end of the housing body is rotatably connected to a transmission shaft. The outer end of the transmission shaft is fixed to the cylinder of the adjustment cylinder. The cylinder rod of the adjustment cylinder is connected to the rear pull rod, the middle pull rod, and the front pull rod in sequence. The front end of the housing body is provided with a base. The front end of the gripper is free. The middle part of the gripper is hinged to the base. The rear end of the gripper is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the front pull rod.

[0008] The tail adjustment device is equipped with an adjustment mechanism, which is used to control the rotation angle of the gripper around the central axis of the front pull rod.

[0009] The drive shaft is mounted on the rear tie rod. One end of the drive shaft is supported in the housing body by a deep groove ball bearing, and the middle part of the drive shaft is supported in the housing body by a self-aligning roller bearing.

[0010] A strip-shaped through hole is opened on the transmission shaft, and a transmission handle is connected to the rear tie rod. Both ends of the transmission handle extend outside the strip-shaped through hole, and a chuck is fixed at the top of the transmission handle.

[0011] An encoder bracket is fixed on the main body of the outer shell. A motor encoder is mounted on the encoder bracket. The output shaft of the motor encoder is connected to a lead screw through a third reducer. The lead screw is mounted on the encoder bracket through a bearing. A lead screw nut is connected to the lead screw. The lead screw nut is fixed in the lead screw nut seat. The bottom of the lead screw nut seat is provided with a slot. A chuck is installed in the slot.

[0012] A slide bar is fixed on the encoder bracket, and the lead screw seat is slidably connected to the slide bar. The slide bar is arranged parallel to the lead screw.

[0013] The rear adjustment device also includes a power shaft mounted on the front tie rod. One end of the power shaft is supported in the housing body by a deep groove ball bearing, and the other end of the power shaft is supported in the housing body by a self-aligning roller bearing.

[0014] The adjustment mechanism includes a rotating bracket fixed to the outer shell body, a first gear mounted on the rotating bracket, a second gear and a third gear meshing sequentially with the first gear, a second motor driving the first gear to rotate through a second reducer, and the third gear being fixed to the base by multiple bolts.

[0015] The feeding device includes a main support frame, a guide support frame is provided on the main support frame, and a rack is mounted on the guide support frame, with the rack arranged along the length of the guide support frame;

[0016] The tail adjustment device also includes a sliding bracket that is slidably mounted on the guide bracket. The bottom of the sliding bracket is equipped with a fourth gear that meshes with the rack. The first motor drives the fourth gear to rotate through the first reducer. The top of the sliding bracket is connected to the outer shell body by multiple bolts.

[0017] The translation device is equipped with a translation bracket and a push plate that is slidably mounted on the translation bracket. The push plate is equipped with two claws.

[0018] The translation bracket is installed on one side of the main bracket via an inclined bracket, and a weight-reducing through hole is provided in the middle of the inclined bracket;

[0019] The translation bracket is arranged at an angle. The bottom of the rear section of the translation bracket is hinged to the inclined bracket. The bottom of the front section of the translation bracket is supported on the main bracket by a lifting cylinder. The front end of the translation bracket is provided with a guide groove. One side of the push plate is slidably connected to the guide groove by a slider. The other side of the push plate is hinged to the end of the cylinder rod of the translation cylinder by a first ear plate. The cylinder of the translation cylinder is hinged to the second ear plate. The second ear plate is fixed on the translation bracket.

[0020] The chuck includes a first guide plate and a second guide plate. The first guide plate is vertically arranged at the front end of the second guide plate, and the second guide plate is fixed to the push plate by multiple bolts.

[0021] The material feeding device includes a material feeding bracket, and a buffer plate is inclinedly arranged on the top of the material feeding bracket. An upward-opening material feeding seat is formed between the buffer plate and the material feeding bracket.

[0022] The guide bracket is arranged along the length of the main support, and multiple guide devices are arranged on the main support, with the multiple guide devices arranged along the length of the main support.

[0023] The guiding device includes a support base, a guide rod, and a rotary cylinder. The support base is fixed on the main support frame. The bottom end of the guide rod is hinged to the support base, and the top end of the guide rod is equipped with a guide wheel. The cylinder barrel of the rotary cylinder is hinged to the support base, and the cylinder rod end of the rotary cylinder is hinged to the middle of the guide rod.

[0024] A limit baffle is provided at the front end of the base, and the limit baffle is placed between two grippers.

[0025] One end of the middle tie rod is provided with a first connecting section, which is threaded to the rear tie rod, and a first locking nut is threaded onto the first connecting section.

[0026] The other end of the middle tie rod is provided with a second connecting section, which is threaded onto the front tie rod, and a second locking nut is threaded onto the second connecting section.

[0027] A copper sleeve is installed between the third gear and the front tie rod.

[0028] Compared with the prior art, the specific beneficial effects of this invention are reflected in:

[0029] I. This invention uses multiple translation devices, feeding devices, multiple dropping devices, tail adjustment devices, and multiple guiding devices in combination to realize automatic feeding, angle adjustment, clamping, and return of spring bar materials. It can adapt to the feeding of spring bar materials of multiple diameters, with a high degree of automation and good stability.

[0030] Second, this invention uses a tail adjustment device to stably clamp the spring bar material through the cooperation of two grippers. By monitoring the opening distance between the two grippers, the clamping angle of the spring bar material is determined. If the clamping position is appropriate, the material can be directly fed to flatten it. If the clamping position is inappropriate, it can be rotated 90 degrees to achieve the required clamping angle, and then fed to flatten it again. Positioning is quick and convenient, requiring no manual adjustment, and it can adapt to the processing of straight or cross-shaped bar materials.

[0031] Third, the guiding devices of the present invention are all equipped with independent cylinders, which can control the lifting and lowering of the guide wheels individually. When the tail adjustment device makes linear reciprocating motion, the guide wheels descend to make necessary clearance, without affecting the unloading and feeding, and can realize continuous and gapless processing with a high degree of automation and high production efficiency. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0033] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0034] Figure 3 for Figure 1 A magnified view of a section at point B.

[0035] Figure 4 This is a front view of the present invention.

[0036] Figure 5 This is a rear view of the present invention.

[0037] Figure 6 for Figure 5 A magnified view of a section at point C.

[0038] Figure 7 This is a side view of the present invention.

[0039] Figure 8 for Figure 1 A schematic diagram of the mid-tail adjustment device.

[0040] Figure 9 This is a front view of the tail adjustment device.

[0041] Figure 10 This is a side view of the tail adjustment device.

[0042] Figure 11 for Figure 10 Sectional view at point AA.

[0043] Figure 12 for Figure 11 A magnified view of a section at point D.

[0044] Figure 13 This is a schematic diagram of the clamping state in case three of the embodiments.

[0045] Figure 14 This is a schematic diagram of the clamping state in case four of the embodiments.

[0046] In the diagram, 1 is the feeding device, 11 is the main support, 12 is the guide support, 13 is the rack, 2 is the translation device, 21 is the translation support, 22 is the push plate, 23 is the chuck, 231 is the first guide plate, 232 is the second guide plate, 24 is the inclined support, 25 is the lifting cylinder, 26 is the slider, 27 is the first ear plate, 28 is the second ear plate, 29 is the translation cylinder, 3 is the unloading device, 31 is the unloading support, 32 is the buffer plate, 33 is the unloading seat, 4 is the tail adjustment device, 401 is the sliding support, 402 is the outer shell, 403 is the fourth gear, 404 is the first reducer, 405 is the first motor, 406 is the middle tie rod, 407 is the rear tie rod, 408 is the adjustment cylinder, 409 is the front tie rod, 41 is the rear tie rod. 0 is the gripper, 411 is the base, 412 is the connecting rod, 413 is the rotating bracket, 414 is the first gear, 415 is the second gear, 416 is the third gear, 417 is the second reducer, 418 is the second motor, 419 is the transmission shaft, 420 is the strip-shaped through hole, 421 is the transmission handle, 422 is the chuck, 423 is the encoder bracket, 424 is the motor encoder, 425 is the screw nut, 426 is the screw nut seat, 427 is the slide rod, 428 is the power shaft, 429 is the limit baffle, 430 is the first locking nut, 431 is the second locking nut, 432 is the copper sleeve, 433 is the lead screw, 5 is the guide device, 51 is the support base, 52 is the guide rod, 53 is the rotary cylinder, 54 is the guide wheel, and 6 is the flattening mechanism. Detailed Implementation

[0047] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0048] like Figure 1 , Figure 4 , Figure 5 , Figure 7As shown, the automatic feeding mechanism for spring bars includes a feeding device 1, a plurality of translation devices 2 are arranged at intervals on one side of the feeding device 1, a plurality of dropping devices 3 are arranged at intervals on the other side of the feeding device 1, and a tail adjustment device 4 is movably provided on the feeding device 1.

[0049] like Figure 1 , Figure 2 , Figure 7 As shown, the translation device 2 is provided with a translation bracket 21 and a push plate 22 slidably mounted on the translation bracket 21. The translation bracket 21 is mounted on one side of the main support 11 through an inclined bracket 24. The inclined bracket 24 has a weight-reducing through hole in the middle. The translation bracket 21 is arranged obliquely downward with the rear end higher than the front end. The bottom of the rear section of the translation bracket 21 is hinged to the inclined bracket 24. The bottom of the front section of the translation bracket 21 is supported by a lifting cylinder 25.

[0050] The front end of the translation bracket 21 is provided with a guide groove, which is arranged along the length of the translation bracket 21. One side of the push plate 22 is slidably connected in the guide groove through the slider 26. The other side of the push plate 22 is hinged to the cylinder rod end of the translation cylinder 29 through the first ear plate 27. The cylinder of the translation cylinder 29 is hinged to one end of the second ear plate 28, and the other end of the second ear plate 28 is fixed on the translation bracket 21.

[0051] The top of the push plate 22 is provided with two claws 23. The claws 23 include a first guide plate 231 and a second guide plate 232. The first guide plate 231 is arranged vertically at the front end of the second guide plate 232. The second guide plate 232 is fixed to the push plate 22 by multiple bolts.

[0052] like Figure 1 , Figure 7 As shown, the material feeding device 3 includes a material feeding bracket 31, and a buffer plate 32 is inclinedly arranged on the top of the material feeding bracket 31. The top of the buffer plate 32 is arranged close to the feeding device 1, and an upward-opening material feeding seat 33 is formed between the buffer plate 32 and the material feeding bracket 31.

[0053] like Figure 5 , Figure 6 As shown, the feeding device 1 includes a main support 11, on which multiple guiding devices 5 are arranged at intervals along the length of the main support 11. Each guiding device 5 includes a support base 51, a guide rod 52, and a rotary cylinder 53. The support base 51 is fixed to the main support 11. The bottom end of the guide rod 52 is hinged to the support base 51, and the top end of the guide rod 52 is equipped with a guide wheel 54, which can rotate relative to the guide rod 52. The cylinder barrel of the rotary cylinder 53 is hinged to the support base 51, and the cylinder rod end of the rotary cylinder 53 is hinged to the middle of the guide rod 52.

[0054] like Figure 1 , Figure 3 As shown, a guide bracket 12 is provided on the main support 11. The guide bracket 12 is arranged along the length direction of the main support 11. A rack 13 is mounted on the guide bracket 12. The rack 13 is arranged along the length direction of the guide bracket 12, and the tooth surface of the rack 13 is arranged downward.

[0055] like Figure 1 , Figure 4-5 , Figure 8-11 As shown, the tail adjustment device 4 includes a sliding bracket 401 slidably mounted on the guide bracket 12. The bottom of the sliding bracket 401 is equipped with a fourth gear 403 that meshes with the rack 13. The fourth gear 403 is connected to the output shaft of the first reducer 404 and the first motor 405 in sequence through the power transfer shaft. The first motor 405 drives the fourth gear 403 to rotate.

[0056] The outer casing 402 is mounted on top of the guide bracket 12 by multiple bolts. A central tie rod 406 is slidably mounted inside the outer casing 402. One end of the central tie rod 406 has a first connecting section, which is threadedly connected to one end of a rear tie rod 407. A first locking nut 430 is threaded onto the first connecting section. The other end of the rear tie rod 407 is connected to the cylinder rod of an adjusting cylinder 408. The cylinder barrel of the adjusting cylinder 408 is connected to a transmission shaft 419, which is mounted on the rear tie rod 407. One end of the transmission shaft 419, located inside the outer casing 402, is supported within the outer casing 402 by a deep groove ball bearing, and the other end is supported within the outer casing 402 by a self-aligning roller bearing.

[0057] A strip-shaped through hole 420 is opened on the part of the transmission shaft 419 extending outside the outer shell body 402. The strip-shaped through hole 420 is arranged radially along the transmission shaft 419. A transmission handle 421 is connected to the rear pull rod 407. Both ends of the transmission handle 421 extend outside the strip-shaped through hole 420. A chuck 422 is fixed at the top of the transmission handle 421.

[0058] like Figure 12As shown, an encoder bracket 423 is fixed on the main body 402. A motor encoder 424 is mounted on the encoder bracket 423. The output shaft of the motor encoder 424 is connected to a lead screw 433 via a third reducer. The lead screw 433 is horizontally mounted on the encoder bracket 423 via bearings. A lead screw nut 425 is connected to the lead screw 433 and is fixed inside a lead screw nut seat 426. The bottom of the lead screw nut seat 426 has a slot, in which a chuck 422 is fitted. The lateral movement of the transmission handle 421 drives the lead screw nut seat 426 and the lead screw nut 425 to move laterally, converting the lateral movement of the lead screw 425 into the rotational movement of the lead screw 433. The number of rotations is detected by the motor encoder 424 to record the number of processing operations. A slide rod 427 is fixed on the encoder bracket 423, and the lead screw nut seat 426 is slidably connected to the slide rod 427. The slide rod 427 is arranged parallel to the lead screw 433.

[0059] The other end of the middle tie rod 406 is provided with a second connecting section, which is threaded to the front tie rod 409. A second locking nut 431 is threaded to the second connecting section. A power shaft 428 is mounted on the front tie rod 409. One end of the power shaft 428 is supported in the housing body 402 by a deep groove ball bearing, and the other end of the power shaft 428 is supported in the housing body 402 by a self-aligning roller bearing. The end face of the power shaft 428 is fixed to the spoke of the third gear 416 by bolts. The outer side of the spoke of the third gear 416 is connected to the base 411 by multiple bolts. A copper sleeve 432 is installed between the third gear 416 and the front tie rod 409.

[0060] The tail adjustment device 4 also includes a rotating bracket 413 fixed on the housing body 402. A first gear 414 is mounted on the rotating bracket 413. The first gear 414 is sequentially meshed with a second gear 415 and a third gear 416. The first gear 414 is connected to the output shafts of the second reducer 417 and the second motor 418 in sequence via a transmission shaft. The second gear 415 is rotatably connected to the rotating bracket 413 via an auxiliary adapter shaft. The front pull rod 409 passes through the third gear 416 and extends outward. Two symmetrically arranged grippers 41 The front end of the 0 forms an opening for clamping the bar stock. The middle part of the gripper 410 is hinged to the base 411. The base 411 is arranged at the front end of the outer shell body 402. The front end of the gripper 410 is free. The rear end of the gripper 410 is hinged to one end of the connecting rod 412. The other end of the connecting rod 412 is hinged to the front pull rod 409. The base 411, gripper 410, connecting rod 412 and front pull rod 409 form a multi-link 412 structure. The front end of the base 411 is provided with a limiting baffle 429, which is placed between the two grippers 410.

[0061] The working process of this invention is as follows:

[0062] Feeding: The cylinder rod of the lifting cylinder 25 extends outward, the translation bracket 21 rotates around its tail, the front end of the translation bracket 21 is raised and at its highest point, the translation cylinder 29 retracts inward, the push plate 22 is at the rear end, the cylinder rod of the rotary cylinder 53 extends outward, the guide wheel 54 is at its highest point, the tail adjustment device 4 is at the tail end of the guide bracket 12, and the two grippers 410 on the tail adjustment device 4 open.

[0063] One end of the spring bar has been processed into a rectangular quadrangular structure. The other end of the spring bar is heated to a predetermined temperature. The spring bar rolls into the translation device 2 at an angle perpendicular to the translation bracket 21. The end face of the quadrangular structure is arranged near the tail adjustment device 4, and the unflattened end is arranged near the flattening mechanism 6. Multiple claws 23 at the top form the first row of thrust brackets, and multiple claws 23 at the bottom form the second row of thrust brackets. The spring bar is stuck at the angle between the first guide plate 231 and the second guide plate 232 at the top. Multiple translation cylinders 29 extend outwards synchronously, push plate 22 moves to the foremost position, cylinder rod of lifting cylinder 25 retracts inwards, front end of translation bracket 21 descends to the lowest point, spring bar material disengages from the first row of thrust brackets and falls onto multiple guide wheels 54, cylinder rod of translation cylinder 29 retracts inwards to the initial position; first motor 405 starts, fourth gear 403 rotates, under the meshing action of rack 13, tail adjustment device 4 moves forward to the spring bar material position, spring bar material is placed in two grippers 410, cylinder rod of adjustment cylinder 408 retracts inwards, front pull rod 409, middle pull rod 406, and rear pull rod 407 move backwards synchronously, under the action of connecting rod 412, two grippers 410 engage inwards to clamp spring bar material.

[0064] During the process of clamping spring bar material, taking a cross-shaped spring bar material with a flattened cross-section size of 3:1 as an example (the flattened end cross-section is rectangular, and the length-to-width ratio of the end cross-section is 3:1), since the flattening machine first flattens the long side end face, the upper and lower jaws 410 need to hold the already formed end, which means there are five possible scenarios: Scenario 1: If the short sides at both ends are clamped, and the sensor measures that the opening distance between the two jaws 410 is 3, it can be directly fed into the flattening mechanism 6 for flattening processing; Scenario 2: If the long sides at both ends are clamped, and the sensor measures that the opening between the two jaws 410 is 1, the second motor 418 drives the first gear 414, the second gear 415, the third gear 416, and the base 411 to rotate 90 degrees before feeding it into the flattening mechanism 6 for flattening processing; Scenario 3: If... Figure 13 As shown, if the spring bar material enters the two grippers 410 at a large angle, the two grippers 410 hold the diagonal of the four-sided structure. The spring bar material slides under the action of the clamping force, so that the two grippers hold the long sides of the upper and lower ends. The sensor measures that the opening between the two grippers 410 is 1, rotates 90 degrees and is sent into the flattening mechanism 6 for flattening processing; Case 4, such as Figure 14As shown, if the spring bar material enters the two grippers 410 at a small angle, the two grippers 410 hold the diagonal of the four-sided structure. The spring bar material slides under the action of the clamping force, so that the two grippers hold the short sides at the top and bottom ends. The sensor measures that the opening between the two grippers 410 is 3, and then it is sent to the flattening mechanism 6 for flattening processing; Case 5, such as Figure 13 , 14 As shown, in special cases, the two grippers 410 hold the spring bar material diagonally but cannot slide to the long or short side. The sensor detects that the opening between the two grippers 410 is not 1 or 3, indicating a gripping abnormality. Releasing the two grippers 410 and re-gripping resolves the situation as described in cases three and four. In extreme cases, as in case five, the sensor repeatedly detects that the opening between the two grippers 410 is not 1 or 3, triggering an alarm. On-site handling by the operator is then required.

[0065] After the spring bar material is clamped and positioned in the two grippers 410, the first motor 405 starts working, the tail adjustment device 4 clamps the spring bar material and moves it toward the flattening mechanism 6, the multiple rotary cylinders 53 retract in sequence, the guide wheel 54 rotates downward and avoids the tail adjustment device 4, so as not to affect the operation of the tail adjustment device 4.

[0066] During operation, the cylinder rod of the adjusting cylinder 408 drives the chuck 422, the lead screw seat 426, and the lead screw 425 to move linearly. The linear motion of the lead screw 425 is converted into the rotational motion of the lead screw 433 and the motor encoder 424 shaft, thereby recording the number of processing operations.

[0067] The spring bar material enters the flattening mechanism 6 and is flattened at each end. After flattening, the first motor 405 operates. Under the meshing action of the fourth gear 403 / rack 13, the tail adjustment device 4 moves to the tail of the guide bracket 12. The cylinder rod of the adjusting cylinder 408 extends outward. Under the action of the connecting rod 412, the two grippers 410 open and release the spring bar material. Under the friction action of the second row of thrust brackets, the spring bar material falls onto the second row of thrust brackets. Driven by the second motor 418, the two grippers 410 reset. Subsequently, the cylinder rod of the lifting cylinder 25 extends outward, and the spring bar material to be processed next rolls into the first row of thrust brackets. The cylinder rod of the translation cylinder 29 extends outward, and the spring bar material to be processed next enters the pre-processing position. The cylinder rod of the lifting cylinder 25 retracts inward, and the processed spring bar material placed on the second row of thrust brackets falls into multiple buffer plates 32. The processed spring bar material falls into the material dropping seat 33, and the spring bar material to be processed next begins positioning and flattening, thus completing one feeding and processing operation.

[0068] This invention enables automatic feeding, angle adjustment, clamping, and return of spring bar stock. It can adapt to feeding spring bar stock of various diameters without manual adjustment. It can also process straight or cross-shaped bar stock, with a high degree of automation and good stability.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. An automatic feeding mechanism for spring bars, characterized in that, It includes a feeding device (1), a plurality of translation devices (2) are arranged on one side of the feeding device (1), a plurality of dropping devices (3) are arranged on the other side of the feeding device (1), and a tail adjustment device (4) is movably provided on the feeding device (1). The tail adjustment device (4) includes a housing body (402) and two symmetrically arranged grippers (410). A transmission shaft (419) is rotatably connected to the rear end of the housing body (402). One end of the transmission shaft (419) is supported inside the housing body (402) by a deep groove ball bearing, and the middle part of the transmission shaft (419) is supported inside the housing body (402) by a self-aligning roller bearing. The transmission shaft (419) is mounted on the rear tie rod (407). The outer end is fixed to the cylinder of the adjusting cylinder (408). The cylinder rod of the adjusting cylinder (408) is connected to the rear pull rod (407), the middle pull rod (406), and the front pull rod (409) in sequence. The front end of the outer shell body (402) is provided with a base (411). The front end of the gripper (410) is free. The middle part of the gripper (410) is hinged to the base (411). The rear end of the gripper (410) is hinged to one end of the connecting rod (412). The other end of the connecting rod (412) is hinged to the front pull rod (409). The transmission shaft (419) has a strip-shaped through hole (420), and the rear pull rod (407) is connected to a transmission handle (421). Both ends of the transmission handle (421) extend outside the strip-shaped through hole (420), and a chuck (422) is fixed at the top of the transmission handle (421). An encoding bracket (423) is fixed on the outer shell body (402). A motor encoder (424) is mounted on the encoding bracket (423). The output shaft of the motor encoder (424) is connected to the lead screw (433) through a third reducer. The lead screw (433) is mounted on the encoding bracket (423) through a bearing. A lead nut (425) is connected to the lead screw (433). The lead nut (425) is fixed in the lead nut seat (426). The bottom of the lead nut seat (426) is provided with a slot. The chuck (422) is fitted in the slot. A slide rod (427) is fixed on the encoder bracket (423), and the lead screw seat (426) is slidably connected to the slide rod (427). The slide rod (427) is arranged parallel to the lead screw (433). The tail adjustment device (4) is provided with an adjustment mechanism, which is used to control the rotation angle of the gripper (410) around the central axis of the front pull rod (409). The adjustment mechanism includes a rotating bracket (413) fixed on the outer shell body (402). The rotating bracket (413) is equipped with a first gear (414). The first gear (414) is sequentially meshed with a second gear (415) and a third gear (416). The second motor (418) drives the first gear (414) to rotate through the second reducer (417). The third gear (416) is fixed to the base (411) by multiple bolts. The tail adjustment device (4) also includes a power shaft (428) mounted on the front tie rod (409). One end of the power shaft (428) is supported in the housing body (402) by a deep groove ball bearing, and the other end of the power shaft (428) is supported in the housing body (402) by a self-aligning roller bearing.

2. The automatic feeding mechanism for spring bars according to claim 1, characterized in that, The feeding device (1) includes a main support (11), a guide support (12) is provided on the main support (11), and a rack (13) is mounted on the guide support (12). The rack (13) is arranged along the length direction of the guide support (12). The tail adjustment device (4) further includes a sliding bracket (401) slidably mounted on the guide bracket (12). The bottom of the sliding bracket (401) is equipped with a fourth gear (403) that meshes with the rack (13). The first motor (405) drives the fourth gear (403) to rotate through the first reducer (404). The top of the sliding bracket (401) is connected to the outer shell body (402) by multiple bolts.

3. The automatic feeding mechanism for spring bars according to claim 2, characterized in that, The translation device (2) is provided with a translation bracket (21) and a push plate (22) slidably mounted on the translation bracket (21). The push plate (22) is provided with two claws (23). The translation bracket (21) is installed on one side of the main bracket (11) via the inclined bracket (24), and the inclined bracket (24) has a weight-reducing through hole in the middle. The translation bracket (21) is arranged at an angle. The bottom of the rear section of the translation bracket (21) is hinged to the inclined bracket (24). The bottom of the front section of the translation bracket (21) is supported on the main bracket (11) by the lifting cylinder (25). The front end of the translation bracket (21) is provided with a guide groove. One side of the push plate (22) is slidably connected in the guide groove by the slider (26). The other side of the push plate (22) is hinged to the cylinder rod end of the translation cylinder (29) by the first ear plate (27). The cylinder of the translation cylinder (29) is hinged to the second ear plate (28). The second ear plate (28) is fixed on the translation bracket (21). The claw (23) includes a first guide plate (231) and a second guide plate (232). The first guide plate (231) is arranged vertically at the front end of the second guide plate (232), and the second guide plate (232) is fixed to the push plate (22) by multiple bolts.

4. The automatic feeding mechanism for spring bars according to claim 3, characterized in that, The material feeding device (3) includes a material feeding bracket (31), and a buffer plate (32) is inclinedly arranged on the top of the material feeding bracket (31). An upward-opening material feeding seat (33) is formed between the buffer plate (32) and the material feeding bracket (31).

5. The automatic feeding mechanism for spring bars according to claim 4, characterized in that, The guide bracket (12) is arranged along the length of the main bracket (11), and a plurality of guide devices (5) are arranged on the main bracket (11). The plurality of guide devices (5) are arranged along the length of the main bracket (11). The guiding device (5) includes a support base (51), a guide rod (52) and a rotary cylinder (53). The support base (51) is fixed on the main support (11). The bottom end of the guide rod (52) is hinged to the support base (51). The top end of the guide rod (52) is equipped with a guide wheel (54). The cylinder of the rotary cylinder (53) is hinged to the support base (51). The end of the cylinder rod of the rotary cylinder (53) is hinged to the middle of the guide rod (52).

6. The automatic feeding mechanism for spring bars according to claim 5, characterized in that, A limiting baffle (429) is arranged at the front end of the base (411), and the limiting baffle (429) is placed between two grippers (410).

7. The automatic feeding mechanism for spring bars according to claim 6, characterized in that, One end of the intermediate pull rod (406) is provided with a first connecting section, which is threadedly connected to the rear pull rod (407), and a first locking nut (430) is threadedly connected to the first connecting section. The other end of the intermediate pull rod (406) is provided with a second connecting section, which is threaded to the front pull rod (409), and a second locking nut (431) is threaded to the second connecting section.

8. The automatic feeding mechanism for spring bars according to claim 7, characterized in that, A copper sleeve (432) is installed between the third gear (416) and the front tie rod (409).

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