Automatic loading and posture adjustment device for helical springs before load testing

Abstract

The present invention provides an automatic feeding and posture adjustment device for a coil spring before a load test, which belongs to the technical field of spring feeding, and includes an adjustment mechanism and a manipulator. The adjustment mechanism includes a housing, a rotating assembly and an end positioning assembly; a feeding sensor is installed below the adjustment slot; the rotating assembly includes two rotating shafts and a rotating motor; the end positioning assembly includes a vibration plate, a limit plate and a piston; a guide slot is provided on the limit plate, a limit rod that can penetrate the guide slot and limit the end is connected to the piston, and a reset spring is connected between the piston and the vibration plate. The rotating assembly of the present invention can drive the coil spring to rotate and adjust the posture of the coil spring. At the same time, the limit rod positions the end of the coil spring, so that the end position of each coil spring is consistent, which is convenient for the coil springs grasped by the manipulator to have consistent postures, and is conducive to improving the accuracy of the test.

Description

Technical Field

[0001] The invention relates to the technical field of spring feeding, and in particular to an automatic feeding and posture adjustment device for a spiral spring before a load test. Background Art

[0002] A spring is a mechanical part that uses elasticity to work. Parts made of elastic materials deform under the action of external forces and return to their original shape after the external force is removed. Coil springs are usually helical springs made of spring steel wire. Cylindrical coil springs are a type of coil spring. Their characteristic line is a straight line. They can be used as compression springs, tension springs, torsion springs, etc. Load testing is one of the commonly used test methods. After the coil spring is produced, it is usually necessary to conduct a load test. By applying a static load to the coil spring and observing the deformation law of the coil spring, the mechanical properties of the coil spring can be obtained.

[0003] For example, the patent application document with publication number CN115447954A discloses an automatic loading device for standing processing or load sorting of truck clutch springs. The springs are loaded into a hopper manually or by a hoist. The springs with horizontal spring bodies in the hopper will be lifted by the first washboard that moves up and down to the second washboard of the next level. Springs with incorrect directions will naturally fall on the washboard until they are in the correct direction and can be lifted up again. Similarly, the springs in the hopper are transported to the conveyor belt in an orderly manner, and the left and right moving cylinders drive the finger cylinders, the upper and lower cylinders for discharging materials, the upper and lower cylinders for picking up materials, and the rotating cylinders to move forward to the picking position, and move the coil springs to the discharging position, and then enter the load sorting machine for testing.

[0004] The hopper of the above-mentioned automatic feeding equipment only adjusts the coil spring to a horizontal state of the spring body, while the end position of the coil spring is not fixed, and the coil spring cannot be accurately positioned. The position of the end of the coil spring will affect the stress condition of the coil spring during the test, thereby affecting the accuracy of the test. Summary of the invention

[0005] In view of this, the present invention provides an automatic feeding and posture adjustment device for a coil spring before a load test, so as to solve the technical problem that the positions of the ends of the coil springs are inconsistent when the automatic feeding equipment is feeding, thus affecting the test accuracy.

[0006] In order to solve the above technical problems, the present invention provides an automatic feeding and posture adjustment device for a coil spring before a load test, comprising an adjustment mechanism and a manipulator arranged on one side of the adjustment mechanism, wherein the adjustment mechanism comprises a housing having an adjustment slot, a rotating assembly arranged in the housing and capable of driving the coil spring to rotate, and an end positioning assembly arranged at one end of the adjustment slot; a feeding sensor is installed below the adjustment slot;

[0007] The rotating assembly includes two rotating shafts which are parallelly connected to the adjusting groove and abut against the spring body of the spiral spring, and a rotating motor which drives the rotating shafts to rotate;

[0008] The end positioning assembly includes a vibration plate elastically connected to one end of the adjustment slot, a limit plate rotatably mounted on one side of the vibration plate and capable of abutting against the end of the coil spring, and a piston slidably arranged between the vibration plate and the limit plate;

[0009] The vibration plate and the limit plate are provided with cavities for accommodating the piston on the opposite sides. The limit plate is provided with a guide groove. The piston is connected with a limit rod which can penetrate the guide groove and limit the end head. A return spring is connected between the piston and the vibration plate.

[0010] By adopting the above technical solution, after the feeding sensor detects that the produced coil spring falls onto the two rotating shafts in the adjustment groove, the reset spring drives the piston to move to the side close to the limit plate, so that the limit rod passes through the guide groove, and the rotary motor drives the rotating shaft to rotate, thereby driving the coil spring to rotate, so as to adjust the posture of the coil spring. After the end of the coil spring abuts against the limit rod, the rotary motor stops to position the end of the coil spring, and the manipulator transfers the positioned coil spring to the test equipment. The rotating assembly of the present invention can drive the coil spring to rotate and adjust the posture of the coil spring. At the same time, the end positioning assembly positions the end of the coil spring so that the end position of each coil spring is consistent, so as to achieve accurate positioning of the coil spring, facilitate the consistency of the posture of the coil spring grasped by the manipulator, and help improve the accuracy of the test.

[0011] Preferably, the adjustment slot is inclined downward from an end away from the limiting plate to an end close to the limiting plate.

[0012] By adopting the above technical solution, the adjustment groove is tilted and moved to the lower end of the spring outlet, which is conducive to the natural drop of the coil spring from the spring outlet into the adjustment groove.

[0013] Preferably, a cylinder cavity is left between the piston and the limit plate, and an air passage is left in the middle of the piston, one end of which can be connected to the air source and the other end of which is connected to the cylinder cavity;

[0014] A vibration control ring is slidably installed on the side of the vibration plate close to the limit rod, and a stop rod is provided on the piston, which is parallel to the limit rod and can push the vibration control ring to move toward the side close to the vibration plate. A plurality of reset pins and vibration pins are evenly distributed on the vibration plate, and the ends of the reset pins and the vibration pins are provided with inclined surfaces that can abut against the vibration control ring. Two reset springs are connected between the reset pin and the vibration pin and the vibration plate, and a plurality of protrusions that can push the vibration pin to move intermittently along the radial direction of the vibration control ring are evenly distributed on the circumference of one end of the rotating shaft.

[0015] By adopting the above technical scheme, after the airway is connected to the air source, the air pressure in the cylinder cavity increases, pushing the piston to move to the side away from the limit plate, the limit rod is disengaged from the guide groove, the return spring is compressed, the limit rod and the stop rod push the vibration control ring to move to the side close to the vibration plate, and the vibration control ring pushes the vibration pin and the reset pin to move in the direction away from the axis of the vibration control ring. As the rotating shaft rotates, the protrusion on the rotating shaft pushes the vibration pin to move radially along the vibration control ring. Under the joint action of the protrusion and the return spring, the vibration pin reciprocates radially along the vibration control ring. When the vibration pin moves toward the axial direction close to the vibration control ring, it drives the vibration control ring to vibrate. The vibration control ring drives the vibration plate and the limit plate to vibrate in turn, causing the coil spring to vibrate when it contacts the limit plate, which is beneficial to adjusting the posture of the coil spring, thereby facilitating the rotating shaft to drive the coil spring to rotate smoothly, and also reduces the occurrence of the end being stuck. After the vibration, the air source stops ventilating, and the return spring drives the piston to move to the side close to the limit plate, so that the limit rod passes through the guide groove, positions the end of the coil spring, and then realizes the accurate positioning of the coil spring.

[0016] Preferably, a fixed plate parallel to the vibration plate is installed at the end of the adjustment groove, a limit screw fixedly connected to the vibration plate is passed through the fixed plate and the vibration plate, there is a clearance fit between the limit screw and the fixed plate, and a vibration plate return spring is connected between the vibration plate and the fixed plate to enable relative sliding and deflection between the vibration plate and the fixed plate.

[0017] By adopting the above technical solution, relative sliding and deflection can occur between the vibration plate and the fixed plate, which is conducive to the vibration plate driving the limit plate to vibrate.

[0018] Preferably, the shell is slidably connected to the base, and the base is provided with a first linear driver capable of driving the shell to move. The shell is provided with two adjustment slots in parallel, and the positioning of the end head can be achieved in both adjustment slots.

[0019] By adopting the above technical solution, after the coil spring completes posture adjustment in one adjustment slot, the first linear actuator drives the housing to move, so that the coil spring falls into another adjustment slot and performs posture adjustment, which is beneficial to improving the efficiency of posture adjustment.

[0020] Preferably, baffles are slidably mounted on both sides of the adjustment slot, and a second linear actuator capable of driving the baffle to rise and fall is provided below the adjustment slot.

[0021] By adopting the above technical solution, the baffle helps to reduce the deviation of the coil spring from the adjustment groove during falling or posture adjustment. After the coil spring completes the posture adjustment in the adjustment groove, the second linear drive drives the baffle to move downward, which is conducive to the manipulator grasping the coil spring after the posture adjustment.

[0022] Preferably, a gear ring is fixedly installed on one side of the limit plate close to the vibration plate, a connecting rod passes through the vibration plate, a transmission gear meshing with the gear ring is fixedly installed on the end of the connecting rod, a locking gear rotatably connected to the connecting rod and connected to the transmission gear by friction, a rack meshing with the locking gear is elastically connected to one side of the vibration plate, a boss is provided on one side of the rack, and a trigger member that can push the boss up is provided on the baffle.

[0023] By adopting the above technical solution, after the spiral spring posture is adjusted, the rotating motor stops rotating, the rotating shaft stops rotating, and during the process of the second linear drive driving the baffle to move downward, the trigger member is disengaged from the boss, the rack moves downward under the action of elastic force, the rack drives the locking gear to rotate, the locking gear in turn drives the transmission gear and the gear ring to rotate, and then drives the limit plate to rotate a short distance, the guide groove on the limit plate drives the limit rod to rotate, so that the limit rod pushes the end of the spiral spring to rotate a short distance, which is conducive to reducing positioning errors and improving positioning accuracy. The reason for the positioning error is that when the spiral spring falls on the rotating shaft, the end may appear in different positions, and the rotating shaft will still rotate after the end is in place, and the end of the rotating shaft will deviate from the limit rod after the rotating shaft stops rotating. At the same time, there is friction between the spiral spring and the rotating shaft, which may cause the spiral spring to vibrate slightly, resulting in a gap between the end and the limit rod.

[0024] Preferably, a return spring three is connected between the connecting rod and the vibration plate, a plurality of protrusions are provided on the opposite sides of the transmission gear and the locking gear, and a knob is fixedly mounted on the end of the connecting rod away from the transmission gear.

[0025] By adopting the above technical solution, the convex point is conducive to increasing the friction between the transmission gear and the locking gear. By manually rotating and pressing the connecting rod, the transmission gear disengages from the locking gear. The transmission gear rotates with the connecting rod and drives the gear ring to rotate, thereby driving the limit plate to rotate. The guide groove on the limit plate drives the limit rod to rotate, thereby adjusting the position of the limit rod.

[0026] The beneficial effects of the above technical solution of the present invention are as follows:

[0027] 1. The rotating assembly of the present invention can drive the coil spring to rotate in the adjustment groove to achieve the posture adjustment of the coil spring. At the same time, the limit rod positions the end of the coil spring so that the end position of each coil spring is consistent, which is convenient for the coil springs grasped by the manipulator to have consistent postures, and is conducive to improving the accuracy of the test.

[0028] 2. Before the limit rod positions the end of the coil spring, the rotating shaft drives the coil spring to rotate while driving the vibration pin to vibrate, thereby driving the vibration plate and the limit plate to vibrate, so that the coil spring vibrates when it contacts the limit plate. Adjusting the posture of the coil spring is conducive to the smooth rotation of the coil spring driven by the rotating shaft, and also reduces the occurrence of the end being stuck.

[0029] 3. Baffles are slidably installed on both sides of the adjustment groove, which are helpful to reduce the deviation of the spiral spring from the adjustment groove during falling or posture adjustment. After the spiral spring completes the posture adjustment in the adjustment groove, the second linear drive drives the baffle to move downward, which is helpful for the manipulator to grasp the spiral spring after the posture adjustment.

[0030] 4. After the spiral spring posture is adjusted, when the baffle descends, the limit plate is driven to rotate a short distance through the rack and gear transmission connection. The guide groove on the limit plate pushes the limit rod to rotate, so that the limit rod pushes the end of the spiral spring to rotate a short distance, which is beneficial to reduce positioning errors and improve positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the automatic feeding and posture adjustment device for a coil spring before a load test of the present invention;

[0032] Figure 2 It is a schematic diagram of the internal structure of the automatic feeding and posture adjustment device for a coil spring before a load test of the present invention;

[0033] Figure 3 is a cross-sectional view of the end positioning assembly of the present invention;

[0034] Figure 4 An exploded view of the end positioning assembly and the fixing plate of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the limiting rod of the present invention positioning the end of the coil spring;

[0036] Figure 6 It is a partial schematic diagram of the baffle and the vibration plate of the present invention;

[0037] Figure 7 for Figure 6 The enlarged view of point A in the middle;

[0038] Figure 8 It is a schematic structural diagram of the connection among the connecting rod, rack and gear ring of the present invention.

[0039] In the figure: 1, housing; 11, adjustment groove; 12, base; 13, first linear actuator; 14, feeding sensor; 2, rotating assembly; 21, rotating shaft; 211, bump; 22, rotating motor; 3, end positioning assembly; 31, vibration plate; 311, limit screw; 312, vibration plate return spring; 313, groove; 32, limit plate; 321, guide groove; 322, gear ring; 33, piston; 331, return spring 1; 332, cylinder chamber; 333, limit Position rod; 334, stop rod; 335, airway; 34, fixing plate; 341, fixing bolt; 35, vibration control ring; 36, reset pin; 37, vibration pin; 38, reset spring 2; 4, baffle; 41, second linear actuator; 42, trigger; 43, connecting rod; 431, transmission gear; 432, knob; 433, locking gear; 434, reset spring 3; 44, rack; 441, rack reset spring; 442, boss; 5, coil spring; 51, end. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 8 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0041] Example

[0042] This embodiment provides an automatic feeding and posture adjustment device for a coil spring before a load test. Figure 1 As shown, it includes an adjustment mechanism and a manipulator (not shown) arranged on one side of the adjustment mechanism. The adjustment mechanism is used to adjust the posture of the produced coil spring 5 so that the position of the end 51 of the coil spring 5 remains consistent, and the manipulator is used to transfer the coil spring 5 after the posture adjustment to the test equipment for load testing.

[0043] like Figure 2 and Figure 3 As shown, the adjustment mechanism includes a housing 1 , a rotating assembly 2 and an end positioning assembly 3 .

[0044] like Figure 1 and Figure 2As shown, two adjustment slots 11 are arranged in parallel on the housing 1, and the two adjustment slots 11 can realize the positioning of the end head 51. The housing 1 is slidably connected to the base 12, and the base 12 is provided with a first linear actuator 13 that can drive the housing 1 to move. The adjustment slots 11 are located at the lower end of the spring outlet of the equipment that has produced the coil spring 5. After the coil spring 5 falls into one adjustment slot 11 and completes the posture adjustment in the adjustment slot 11, the first linear actuator 13 drives the housing 1 to move, so that the coil spring 5 falls into the other adjustment slot 11 and performs posture adjustment, which is conducive to improving the efficiency of posture adjustment.

[0045] like Figure 2 As shown, a feeding sensor 14 is installed below each adjustment slot 11 . The feeding sensor 14 is a photoelectric sensor for detecting whether a coil spring 5 falls into the adjustment slot 11 .

[0046] like Figure 2 As shown, the rotating assembly 2 includes a rotating shaft 21 and a rotating motor 22 .

[0047] like Figure 2 As shown, two rotating shafts 21 are arranged in parallel in each adjustment slot 11, and both ends of the two rotating shafts 21 are rotationally connected to the adjustment slot 11, and the length direction of the adjustment slot 11 is parallel to the axis direction of the rotating shaft 21. The outer surfaces of the two rotating shafts 21 are in contact with the spring body of the coil spring 5, and the rotating shafts 21 drive the coil spring 5 to rotate through friction force, so as to adjust the posture of the coil spring 5.

[0048] like Figure 2 As shown, a rotating motor 22 is provided on the outer side of the end of each adjustment slot 11 for driving the two rotating shafts 21 in the adjustment slot 11 to rotate. The output shaft of the rotating motor 22 and the two rotating shafts 21 are connected by a synchronous belt transmission.

[0049] like Figure 3 As shown, the end positioning assembly 3 includes a vibration plate 31 , a limit plate 32 and a piston 33 .

[0050] like Figure 3 and Figure 4 As shown, a fixing plate 34 is installed on one side of each adjustment slot 11 near the rotating motor 22 through a fixing bolt 341, and the plate surface of the fixing plate 34 is perpendicular to the axis of the rotating shaft 21. The vibration plate 31 is installed on the fixing plate 34 and is parallel to the fixing plate 34. A limit screw 311 fixedly connected to the vibration plate 31 is passed through between the fixing plate 34 and the vibration plate 31, and there is a clearance fit between the limit screw 311 and the fixing plate 34. A vibration plate return spring 312 is connected between the vibration plate 31 and the fixing plate 34, so that relative sliding and deflection can occur between the vibration plate 31 and the fixing plate 34.

[0051] like Figure 3and Figure 4 As shown, the limit plate 32 is rotatably mounted on the side of the vibration plate 31 away from the fixed plate 34, and the limit plate 32 is parallel to the vibration plate 31. The side of the limit plate 32 away from the vibration plate 31 is designed as a truncated cone surface to abut against the end 51 of the coil spring 5.

[0052] like Figure 3 and Figure 4 As shown, a cavity for accommodating a piston 33 is provided on the opposite sides of the vibration plate 31 and the limiting plate 32 , and the piston 33 is slidably connected to the vibration plate 31 and the limiting plate 32 .

[0053] like Figure 3 and Figure 4 As shown, a guide groove 321 is provided on the limit plate 32, a limit rod 333 which can penetrate the guide groove 321 and limit the end head 51 is connected to the piston 33, and a return spring 331 is connected between the piston 33 and the vibration plate 31.

[0054] like Figure 3 and Figure 4 As shown, the return spring 331 drives the piston 33 to move toward the side close to the limit plate 32, so that the limit rod 333 passes through the guide groove 321, and the rotary motor 22 drives the rotating shaft 21 to rotate, thereby driving the spiral spring 5 to rotate, so as to adjust the posture of the spiral spring 5, as shown in FIG. Figure 5 As shown, after the end 51 of the coil spring 5 abuts against the limiting rod 333, the rotating motor 22 stops rotating, and the limiting rod 333 positions the end 51 of the coil spring 5, so that the position of the end 51 of each coil spring 5 is consistent, thereby achieving accurate positioning of the coil spring 5, facilitating the consistent posture of the coil spring 5 grasped by the manipulator, and helping to improve the accuracy of the test.

[0055] like Figure 2 and Figure 3 As shown, the adjustment slot 11 is tilted downward from one end away from the limit plate 32 to one end close to the limit plate 32. The adjustment slot 11 moves to the lower end of the spring outlet, which is conducive to the natural drop of the coil spring 5 from the spring outlet into the adjustment slot 11.

[0056] like Figure 3 and Figure 4 As shown, a cylinder cavity 332 is reserved between the piston 33 and the limiting plate 32 , and an air passage 335 is reserved in the middle portion of the piston 33 , one end of which can be connected to the air source and the other end of which is connected to the cylinder cavity 332 .

[0057] like Figure 4 and Figure 6As shown, a vibration control ring 35 is slidably installed on one side of the vibration plate 31 close to the limiting rod 333, and the vibration control ring 35 can move along its axial direction. The piston 33 is provided with a stop rod 334 which is parallel to the limiting rod 333 and can push the vibration control ring 35 to move closer to the vibration plate 31. Four grooves 313 are evenly distributed on the vibration plate 31 close to the vibration control ring 35. Reset pins 36 are installed in the upper two grooves 313, and vibration pins 37 are installed in the lower two grooves 313. Reset springs 38 are connected between the reset pin 36 and the vibration pin 37 and the grooves 313. The ends of the reset pin 36 and the vibration pin 37 are provided with inclined surfaces that can abut against the vibration control ring 35. As shown Figure 7 As shown, a plurality of protrusions 211 are evenly distributed around the rotating shaft 21 near one end of the limiting plate 32, which can push the vibration pin 37 to intermittently move along the radial direction of the vibration control ring 35. The lower ends of the two lower grooves 313 are provided with openings so that the lower ends of the vibration pins 37 can contact the protrusions 211.

[0058] like Figure 2 and Figure 3 As shown, the air passage 335 is connected to the air source through an air pipe, and a solenoid valve is provided on the air pipe. The solenoid valve is electrically connected to a controller, and the controller is also electrically connected to the rotating motor 22 and the feeding sensor 14.

[0059] like Figure 3 and Figure 4 As shown, after the air channel 335 is connected to the air source, the air pressure in the cylinder chamber 332 increases, pushing the piston 33 to move to the side away from the limit plate 32, the limit rod 333 is separated from the guide groove 321, the return spring 331 is compressed, the limit rod 333 and the stop rod 334 push the vibration control ring 35 to move to the side close to the vibration plate 31, the vibration control ring 35 pushes the vibration pin 37 and the reset pin 36 to move in the direction away from the axis of the vibration control ring 35, and the vibration pin 37 extends out of the groove 313, as shown in FIG. Figure 6As shown, as the rotating shaft 21 rotates, the protrusion 211 on the rotating shaft 21 intermittently pushes the vibration pin 37 to move toward the axial direction close to the vibration control ring 35, and the return spring 2 38 pushes the vibration pin 37 to move toward the axial direction away from the vibration control ring 35, thereby realizing the reciprocating motion of the vibration pin 37. When the vibration pin 37 moves toward the axial direction close to the vibration control ring 35, it drives the vibration control ring 35 to vibrate, and the vibration control ring 35 drives the vibration plate 31 and the limit plate 32 to vibrate in turn, so that the coil spring 5 vibrates when it contacts the limit plate 32, which is conducive to adjusting the posture of the coil spring 5, thereby facilitating the smooth rotation of the coil spring 5 driven by the rotating shaft 21, and also reduces the occurrence of the situation where the end 51 is stuck. After the coil spring 5 vibrates for a few seconds, the air source stops ventilating, the air pressure in the cylinder chamber 332 decreases, and the return spring 1 331 drives the piston 33 to move toward the side close to the limit plate 32, so that the limit rod 333 penetrates the guide groove 321, and the end 51 of the coil spring 5 is positioned, thereby realizing the accurate positioning of the coil spring 5. The second reset spring 38 pushes the vibration pin 37 and the reset pin 36 to reset, thereby driving the vibration control ring 35 to reset.

[0060] like Figure 1 and Figure 2 As shown, baffles 4 are slidably installed on both sides of the adjustment slot 11, and a second linear actuator 41 that can drive the baffle 4 to rise and fall is provided below the adjustment slot 11. The second linear actuator 41 and the first linear actuator 13 are both one of a cylinder or a hydraulic cylinder, and are both electrically connected to the controller. The baffle 4 is conducive to reducing the deviation of the coil spring 5 from the adjustment slot 11 during the fall or posture adjustment. After the coil spring 5 completes the posture adjustment in the adjustment slot 11, the second linear actuator 41 drives the baffle 4 to move downward, which is conducive to the manipulator grabbing the coil spring 5 after the posture adjustment.

[0061] like Figure 6 and Figure 8 As shown, a gear ring 322 is fixedly installed on one side of the limit plate 32 close to the vibration plate 31, a connecting rod 43 passes through the vibration plate 31, a transmission gear 431 meshing with the gear ring 322 is fixedly installed on the end of the connecting rod 43, a locking gear 433 which is rotatably connected to the transmission gear 431 by friction is connected to one side of the vibration plate 31, a rack 44 meshing with the locking gear 433 is connected to one side of the vibration plate 31 through a rack return spring 441, a boss 442 is provided on one side of the rack 44, and a trigger member 42 which can push the boss 442 to move upward is provided on the baffle 4.

[0062] like Figure 2 As shown, after the spiral spring 5 is adjusted, the rotating motor 22 stops rotating, the rotating shaft 21 stops rotating, and the second linear actuator 41 drives the baffle 4 to move downward. Figure 6 and Figure 8As shown, the trigger member 42 is disengaged from the boss 442, the rack 44 moves downward under the elastic force of the rack reset spring 441, the rack 44 drives the locking gear 433 to rotate, the locking gear 433 drives the transmission gear 431 and the gear ring 322 to rotate in turn, and then drives the limit plate 32 to rotate a short distance, the guide groove 321 on the limit plate 32 pushes the limit rod 333 to rotate, so that the limit rod 333 pushes the end 51 of the coil spring 5 to rotate a short distance, which is conducive to reducing the positioning error and improving the positioning accuracy. The reason for the positioning error is that when the coil spring 5 falls on the rotating shaft 21, the end 51 may appear in different positions, and the rotating shaft 21 will still rotate after the end 51 is in place, and the end 51 will deviate from the limit rod 333 after the rotating shaft 21 stops rotating. At the same time, there is friction between the coil spring 5 and the rotating shaft 21, which may cause the coil spring 5 to vibrate slightly, resulting in a gap between the end 51 and the limit rod 333.

[0063] like Figure 6 and Figure 8 As shown, a return spring 434 is connected between the connecting rod 43 and the vibration plate 31, a plurality of protrusions (not marked in the figure) are provided on the opposite sides of the transmission gear 431 and the locking gear 433, and a knob 432 is fixedly mounted on the end of the connecting rod 43 away from the transmission gear 431.

[0064] like Figure 6 and Figure 8 As shown, the convex point is conducive to increasing the friction between the transmission gear 431 and the locking gear 433. The connecting rod 43 is manually rotated and pressed, and the transmission gear 431 is disengaged from the locking gear 433. The transmission gear 431 rotates with the connecting rod 43 and drives the gear ring 322 to rotate, thereby driving the limit plate 32 to rotate. The guide groove 321 on the limit plate 32 drives the limit rod 333 to rotate, thereby adjusting the position of the limit rod 333.

[0065] The implementation principle of the automatic feeding and posture adjustment device before the coil spring load test in this embodiment is as follows:

[0066] The second linear actuator 41 drives the baffle plate 4 to move upward. During the upward movement of the baffle plate 4, the trigger member 42 pushes the boss 442 to move upward, thereby driving the rack 44 to move upward. The rack 44 drives the locking gear 433 to rotate. The locking gear 433 in turn drives the transmission gear 431 and the gear ring 322 to rotate, thereby driving the limit plate 32 to rotate a short distance. The guide groove 321 on the limit plate 32 pushes the limit rod 333 to rotate, thereby realizing the reset of the guide groove 321 and the limit rod 333. The coil spring 5 falls onto the two rotating shafts 21 of an adjustment groove 11. After the feeding sensor 14 detects the coil spring 5, the rotating motor 22 is started and the solenoid valve is turned on.

[0067] After the air channel 335 is connected to the air source, the air pressure in the cylinder chamber 332 increases, pushing the piston 33 to move to the side away from the limit plate 32, the limit rod 333 is disengaged from the guide groove 321, the return spring 331 is compressed, the limit rod 333 and the stop rod 334 push the vibration control ring 35 to move to the side close to the vibration plate 31, the vibration control ring 35 pushes the vibration pin 37 and the return pin 36 to move away from the axis of the vibration control ring 35, the vibration pin 37 extends out of the groove 313, the rotating motor 22 drives the rotating shaft 21 to rotate, and the rotating shaft 21 drives the spiral spring 5 to rotate. At the same time, the protrusion 211 on the rotating shaft 21 The vibration pin 37 is intermittently pushed to move toward the axial direction close to the vibration control ring 35, and the reset spring 38 pushes the vibration pin 37 to move toward the axial direction away from the vibration control ring 35, thereby realizing the reciprocating motion of the vibration pin 37. When the vibration pin 37 moves toward the axial direction close to the vibration control ring 35, it drives the vibration control ring 35 to vibrate. The vibration control ring 35 drives the vibration plate 31 and the limit plate 32 to vibrate in turn, so that the coil spring 5 vibrates when it contacts the limit plate 32. Adjusting the posture of the coil spring 5 is conducive to the smooth rotation of the coil spring 5 driven by the rotating shaft 21, and also reduces the occurrence of the end 51 being stuck.

[0068] After the coil spring 5 vibrates for a few seconds, the air source stops ventilating, the air pressure in the cylinder chamber 332 decreases, and the return spring 331 drives the piston 33 to move to the side close to the limit plate 32, so that the limit rod 333 passes through the guide groove 321. The rotating shaft 21 drives the coil spring 5 to rotate until the end 51 of the coil spring 5 abuts against the limit rod 333, and then the rotating motor 22 stops rotating. The limit rod 333 positions the end 51 of the coil spring 5, so that the positions of the ends 51 of multiple coil springs 5 ​​are consistent, thereby achieving accurate positioning of the coil spring 5, which is beneficial to improving the accuracy of the test.

[0069] The first linear actuator 13 drives the housing 1 to move, so that the coil spring 5 falls into another adjustment groove 11 for posture adjustment. After the adjustment is completed, when the second linear actuator 41 drives the baffle 4 to move downward, the trigger member 42 disengages from the boss 442, and the rack 44 moves downward under the elastic force of the rack return spring 441. The rack 44 drives the locking gear 433 to rotate, and the locking gear 433 drives the transmission gear 431 and the gear ring 322 to rotate in turn, thereby driving the limit plate 32 to rotate a short distance. The guide groove 321 on the limit plate 32 pushes the limit rod 333 to rotate, so that the limit rod 333 pushes the end 51 of the coil spring 5 to rotate a short distance, which is beneficial to reduce positioning errors and improve positioning accuracy.

[0070] The manipulator transfers the coil spring 5 after the posture adjustment to the test equipment for load testing.

[0071] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic feeding and posture adjustment device for a coil spring before a load test, comprising an adjustment mechanism and a manipulator arranged on one side of the adjustment mechanism, characterized in that: The adjustment mechanism comprises a housing (1) having an adjustment slot (11), a rotating assembly (2) disposed in the housing (1) and capable of driving the spiral spring (5) to rotate, and an end positioning assembly (3) disposed at one end of the adjustment slot (11); a feeding sensor (14) is installed below the adjustment slot (11); The rotating assembly (2) comprises two rotating shafts (21) which are connected in parallel and rotationally in the adjustment slot (11) and are both in contact with the spring body of the coil spring (5), and a rotating motor (22) which drives the rotating shafts (21) to rotate. The end positioning assembly (3) comprises a vibration plate (31) elastically connected to one end of the adjustment groove (11), a limit plate (32) rotatably mounted on one side of the vibration plate (31) and capable of abutting against an end (51) of the coil spring (5), and a piston (33) slidably arranged between the vibration plate (31) and the limit plate (32); A cavity for accommodating the piston (33) is provided on the opposite sides of the vibration plate (31) and the limiting plate (32); a guide groove (321) is provided on the limiting plate (32); a limiting rod (333) is connected to the piston (33) and is capable of penetrating the guide groove (321) and limiting the position of the end head (51); and a return spring (331) is connected between the piston (33) and the vibration plate (31).

2. The automatic feeding and posture adjustment device for coil springs before load testing according to claim 1, characterized in that: The adjustment groove (11) is inclined downward from an end away from the limiting plate (32) to an end close to the limiting plate (32).

3. The automatic feeding and posture adjustment device for coil springs before load testing according to claim 1, characterized in that: A cylinder cavity (332) is reserved between the piston (33) and the limiting plate (32), and an air passage (335) is reserved in the middle of the piston (33) with one end being connected to an air source and the other end being connected to the cylinder cavity (332); A vibration control ring (35) is slidably mounted on one side of the vibration plate (31) close to the limit rod (333); a stop rod (334) is provided on the piston (33) and is parallel to the limit rod (333) and can push the vibration control ring (35) to move toward a side close to the vibration plate (31); a plurality of reset pins (36) and vibration pins (37) are evenly distributed on the vibration plate (31); ends of the reset pins (36) and vibration pins (37) are each provided with an inclined surface that can abut against the vibration control ring (35); reset springs (38) are connected between the reset pins (36) and vibration pins (37) and the vibration plate (31); and a plurality of protrusions (211) are evenly distributed in the circumferential direction of one end of the rotating shaft (21) and can push the vibration pins (37) to intermittently move along the radial direction of the vibration control ring (35).

4. The automatic feeding and posture adjustment device for coil springs before load testing according to claim 3, characterized in that: A fixing plate (34) parallel to the vibration plate (31) is mounted at the end of the adjustment slot (11); a limit screw (311) fixedly connected to the vibration plate (31) passes through the fixing plate (34) and the vibration plate (31); a clearance fit is formed between the limit screw (311) and the fixing plate (34); a vibration plate return spring (312) is connected between the vibration plate (31) and the fixing plate (34) so ​​that relative sliding and deflection can occur between the vibration plate (31) and the fixing plate (34).

5. The automatic feeding and posture adjustment device for coil springs before load testing according to claim 4, characterized in that: The housing (1) is slidably connected to the base (12); a first linear actuator (13) capable of driving the housing (1) to move is provided on the base (12); two adjustment slots (11) are arranged in parallel on the housing (1); and the positioning of the end head (51) can be achieved in both adjustment slots (11).

6. The automatic feeding and posture adjustment device for coil springs before load testing according to claim 5, characterized in that: Baffles (4) are slidably mounted on both sides of the adjustment slot (11), and a second linear driver (41) capable of driving the baffle (4) to move up and down is provided below the adjustment slot (11).

7. The automatic feeding and posture adjustment device for coil springs before load testing according to claim 6, characterized in that: A toothed ring (322) is fixedly mounted on one side of the limit plate (32) close to the vibration plate (31); a connecting rod (43) passes through the vibration plate (31); a transmission gear (431) meshing with the toothed ring (322) is fixedly mounted on the end of the connecting rod (43); a locking gear (433) connected to the transmission gear (431) by friction is rotatably connected to the connecting rod (43); a rack (44) meshing with the locking gear (433) is elastically connected to one side of the vibration plate (31); a boss (442) is provided on one side of the rack (44); and a trigger member (42) capable of pushing the boss (442) to move upward is provided on the baffle plate (4).

8. The automatic feeding and posture adjustment device for coil springs before load testing according to claim 7, characterized in that: A return spring three (434) is connected between the connecting rod (43) and the vibration plate (31); a plurality of protrusions are provided on opposite sides of the transmission gear (431) and the locking gear (433); and a knob (432) is fixedly mounted on one end of the connecting rod (43) away from the transmission gear (431).

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