An automatic sorting device for leaf springs

Abstract

This invention relates to the field of leaf spring manufacturing technology, and more particularly to an automatic sorting device for leaf springs. The device includes: a main body with a feeding mechanism and a discharging mechanism on two opposite sides; a workbench on the main body with a stepping conveyor mechanism mounted thereon, and corresponding pin-threading assemblies mounted on both opposite sides of the stepping conveyor mechanism; a pin-threading assembly comprising a first pin assembly, a leaf spring mounting bracket, and a second pin assembly; a leaf spring positioning mechanism located on the side of the main body facing the feeding mechanism; a sorting assembly mounted on the main body, comprising a pressure application mechanism, a load measuring mechanism, a displacement measuring mechanism, and an automatic coding mechanism; and a hydraulic and electrical control system connected to the feeding mechanism, the leaf spring positioning mechanism, the sorting assembly, and the discharging mechanism. This invention effectively solves the technical problems of high labor intensity, high risk factor, poor installation accuracy, and long adjustment cycle associated with disassembling and assembling pins during leaf spring sorting in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate spring production, and in particular to an automatic sorting device for plate springs. BACKGROUND

[0002] A plate spring, also known as a leaf spring or a blade spring, is an elastic element composed of a plurality of elastic steel plates stacked together. When subjected to an external force, the plate spring will deform and store energy. When the external force disappears, the plate spring will return to its original state and release the stored energy. This energy conversion enables the plate spring to have good cushioning and shock absorption effects, and it is applied to various mechanical, vehicle, ship, aerospace and other fields.

[0003] For example, the patent document with the authorization announcement number CN107314071B discloses a composite plate spring for an automobile. The spring includes a steel plate spring leaf and at least one composite material spring leaf located below the steel plate spring leaf. The steel plate spring leaf and the composite material spring leaf are stacked one above the other and connected as a whole by fasteners. The bottom of the middle part of the composite material spring leaf at the bottom is fixed with a composite material spring leaf mounting pad. The composite material spring leaf mounting pad is a steel groove-shaped part. The bottom and both sides of the composite material spring leaf at the bottom are provided with clamping grooves matching the composite material spring leaf mounting pad. The clamping grooves collectively form a U-shaped groove, and the composite material spring leaf mounting pad is fixed in the U-shaped groove from bottom to top. During use, most of the vibrations are absorbed by the elasticity of the composite material spring leaf, and the steel plate spring leaf connects the vehicle body and bears a small amount of torsion and shear stress caused by steering and braking, thereby ensuring the overall strength.

[0004] It can be seen that the performance of the plate spring is of great significance to the safe driving of the automobile. At present, in the production process of the plate spring, in order to ensure the consistency of the size and performance of the finished plate spring, the produced plate springs need to be sorted. In the prior art, manual operation is required to realize the installation and removal of the pin shaft in the ear hole of the plate spring, and manual adjustment of the position of the pin shaft is required to realize reliable installation of the plate spring on the sorting device, to ensure the accuracy of the subsequent sorting result. The labor intensity of manual disassembly and assembly of the pin shaft is high, the risk coefficient is high, the adjustment accuracy is poor, the adjustment period is long, and the production efficiency of the plate spring is greatly reduced. SUMMARY

[0005] The present application provides an automatic sorting device for plate springs to solve the technical problems of high labor intensity, high risk coefficient, poor installation accuracy and long adjustment period in the prior art.

[0006] To solve the above problems, the automatic sorting device for plate springs provided by the present application adopts the following technical scheme:

[0007] An automatic sorting device for plate springs, comprising:

[0008] The main body of the equipment has a feeding mechanism and a discharging mechanism on its two opposite sides. The main body of the equipment includes a workbench. A stepping conveyor mechanism corresponding to the position of the feeding mechanism and in the same conveying direction is installed on the workbench. Corresponding pin components are installed on both opposite sides of the stepping conveyor mechanism to fix the two ends of the leaf spring respectively.

[0009] A pin assembly is slidably mounted on the worktable. The pin assembly includes a first pin assembly and a second pin assembly arranged opposite to each other. A leaf spring mounting bracket for mounting leaf springs is provided between the first pin assembly and the second pin assembly.

[0010] A leaf spring positioning mechanism is provided on the side of the main body of the equipment facing the feeding mechanism and connected to the first pin assembly. The leaf spring positioning mechanism includes a lifting mechanism with the output end facing upward, and a leaf spring mounting seat is installed at the end of the output end.

[0011] The sorting assembly is mounted on the main body of the equipment and includes a pressure application mechanism, a load measuring mechanism, a displacement measuring mechanism, and an automatic inkjet coding mechanism.

[0012] A hydraulic and electrical control system is connected to the feeding mechanism, the stepping conveyor mechanism, the pin-threading assembly, the lifting mechanism, the sorting assembly, and the unloading mechanism.

[0013] The beneficial effects of the automatic sorting device for leaf springs provided by this invention are:

[0014] 1. By setting up a leaf spring positioning mechanism and connecting it to a hydraulic and electrical control system, after the leaf spring is transported to the leaf spring mounting seat, the hydraulic and electrical control system controls the lifting mechanism to raise the leaf spring, thereby adjusting the height and positioning of the leaf spring; by installing a stepping conveyor mechanism on the worktable, the high-precision positioning feature of the stepping conveyor mechanism is used to accurately control the position of the leaf spring, so that the ear hole of the leaf spring is concentric with the pins of the first pin assembly and the second pin assembly, and it can be ensured that the leaf spring will not shift during the transport process;

[0015] 2. By setting up a pin insertion assembly and connecting it to the hydraulic and electrical control system, the parameters and specifications of the leaf spring under test are input into the hydraulic and electrical control system during use. Then, the hydraulic and electrical control system controls the pin insertion assembly to automatically adjust its position. No manual intervention is required, and the position of the pin insertion assembly can be adjusted quickly and accurately. The automation level is high, the adjustment speed is fast, and the time for adjusting the pin position is greatly shortened. Moreover, after the leaf spring is placed on the leaf spring mounting bracket, the pin insertion, detection, and pin removal work can be automatically completed under the control of the hydraulic and electrical control system, reducing the labor intensity and safety risks of workers.

[0016] Through the above-mentioned design, the present invention effectively solves the technical problems of high labor intensity, high risk factor, poor installation accuracy, and long adjustment cycle in the prior art when disassembling and assembling pins during leaf spring sorting.

[0017] Furthermore, the first pin assembly includes a first pin base, on which a first pin mounting seat that can slide along the conveying direction of the stepping conveyor mechanism is mounted, and a horizontally extending first positioning pin is mounted on the first pin mounting seat. The second pin assembly includes a second pin base, on which a second pin mounting seat that can slide along the conveying direction of the stepping conveyor mechanism is mounted, and a horizontally extending second positioning pin is mounted on the second pin mounting seat. The first positioning pin and the second positioning pin are disposed opposite to each other, and both extend toward the leaf spring mounting bracket.

[0018] Furthermore, a first slide rail is installed on the worktable below both the first pin base and the second pin base. The first slide rail extends in a direction perpendicular to the conveying direction of the stepping conveyor mechanism, and the first pin mounting seat and the second pin mounting seat are slidably mounted on the first slide rail.

[0019] Beneficial effects: The first slide rail is installed on the workbench, and the first pin base and the second pin base are installed on the first slide rail, so that the positions of the first pin base and the second pin base can be flexibly adjusted along the direction of the first slide rail to accommodate leaf springs of different sizes.

[0020] Furthermore, the first pin base and the second pin base are connected to an adjustment motor, which is connected to the hydraulic and electronic control system to drive the first pin base and the second pin base to move under the control of the hydraulic and electronic control system.

[0021] Furthermore, a buffer mechanism is slidably mounted on the end of the leaf spring mounting bracket opposite to the stepping conveyor mechanism.

[0022] Beneficial effects: By setting up a buffer mechanism, the influence of the force on the X-axis (horizontal direction) on the sorting measurement results can be reduced, thereby improving the accuracy of the measurement.

[0023] Furthermore, the leaf spring mounting bracket includes a support base on which a tray is mounted.

[0024] Furthermore, the top surface of the support plate has a notch, the extension direction of which is consistent with the extension direction of the positioning pin, for supporting and positioning the leaf spring's coil lug.

[0025] Beneficial effects: The notch can guide the placement of the ear roll, ensuring that the ear roll can be accurately placed in the predetermined position, reducing errors in the positioning process, making the insertion of the positioning pin more accurate, and enabling the positioning of the ear roll placed in the notch.

[0026] Furthermore, a detection switch is also provided on the workbench next to the pin assembly. The detection switch is used to detect whether the positioning pin is inserted into the lug of the leaf spring.

[0027] Beneficial effects: The detection switch can quickly and accurately determine whether the positioning pin has been successfully inserted into the lug of the leaf spring, and promptly detect situations where the positioning pin is not properly inserted or is inserted incorrectly, which greatly shortens the production cycle and improves the sorting efficiency of leaf springs.

[0028] Furthermore, the lifting mechanism is a servo lift, a variable frequency motor, or a hydraulic cylinder.

[0029] Furthermore, there are multiple pin-feeding components, and each of the multiple pin-feeding components is divided into two groups and arranged on two opposite sides of the conveying direction of the stepping conveyor mechanism.

[0030] The beneficial effects of the automatic sorting equipment for leaf springs provided by this invention are as follows: By setting a leaf spring positioning mechanism including a lifting mechanism and a leaf spring mounting base, and connecting the lifting mechanism to a hydraulic and electrical control system, when the leaf spring is transported to the leaf spring mounting base, the hydraulic and electrical control system controls the lifting mechanism to rise, thereby adjusting the installation height and position of the leaf spring. The spring is transported by a stepping conveyor mechanism to avoid displacement of the leaf spring during the transport process, ensuring that the ear hole of the leaf spring is concentric with the pins of the first pin assembly and the second pin assembly. By setting a pin-through assembly and connecting it to the hydraulic and electrical control system, the position of the pin-through assembly can be adjusted by the hydraulic and electrical control system, greatly improving the degree of automation and the accuracy of adjustment. By installing the first pin base and the second pin base on the first slide rail, their positions can be flexibly adjusted to accommodate leaf springs of different sizes. By setting a detection switch to detect whether the positioning pin is inserted into the ear hole of the leaf spring, the situation of the positioning pin not being installed in place or being inserted incorrectly can be detected in time, improving the sorting efficiency of leaf springs. Attached Figure Description

[0031] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0032] Figure 1 This is a schematic diagram of the automatic sorting device for leaf springs provided by the present invention;

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

[0034] Figure 3This is a schematic diagram of the main body of the device provided by the present invention;

[0035] Figure 4 for Figure 3 A top view of the main body of the device shown;

[0036] Figure 5 This is a schematic diagram of the stepping conveyor mechanism provided by the present invention;

[0037] Figure 6 This is a schematic diagram of the clamping mechanism provided by the present invention;

[0038] Figure 7 A schematic diagram of the leaf spring positioning mechanism and pin assembly provided by the present invention;

[0039] Figure 8 for Figure 7 The top view of the leaf spring positioning mechanism and the pin assembly shown;

[0040] Figure 9 for Figure 7 The side view of the leaf spring positioning mechanism and the pin assembly shown.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Workbench; 2. Stepping conveyor body; 3. Leaf spring mounting seat; 4. Hydraulic and electrical control system; 5. First pin base; 6. First pin mounting seat; 7. First positioning pin; 8. Second pin base; 9. Second pin mounting seat; 10. Second positioning pin; 11. First slide rail; 12. Adjusting motor; 13. Buffer mechanism; 14. Support seat; 15. Pallet; 16. Notch; 17. Servo lift; 18. Mounting port; 19. Cylinder; 20. Protective plate; 21. Drive motor; 22. Clamping seat; 23. Clamping block; 24. Drive shaft; 25. Mechanism base; 26. Second slide rail; 27. Load measuring mechanism; 28. Displacement measuring mechanism. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that the main concept of the automatic sorting equipment for leaf springs provided by this invention is as follows: By setting a leaf spring height adjustment mechanism and connecting it to the hydraulic and electrical control system 4, when the leaf spring is conveyed to the leaf spring mounting seat 3, the hydraulic and electrical control system 4 drives the lifting mechanism to lift the leaf spring, so as to adjust its height and position the leaf spring; a stepping conveyor mechanism is equipped on the worktable 1, which can achieve precise control of its position while ensuring smooth conveying of the leaf spring, so that the ear hole of the leaf spring is concentric with the pins of the first pin assembly and the second pin assembly, and effectively prevents the leaf spring from shifting during the conveying process; by setting a pin-threading assembly and connecting it to the hydraulic and electrical control system 4, when in use, only the parameter specifications of the leaf spring to be tested need to be input into the hydraulic and electrical control system 4, and the system can automatically adjust the position of the pin-threading assembly without manual intervention, with a high level of automation and rapid adjustment, significantly shortening the time for adjusting the pin position. In addition, when the leaf spring is placed on the leaf spring mounting frame, the system can automatically complete the pin-threading, detection and pin-removal operations, effectively reducing the workload of workers and reducing the safety risks in the operation.

[0045] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0046] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0047] Embodiment 1 of the automatic sorting device for leaf springs provided by the present invention:

[0048] like Figures 1 to 9 As shown, the automatic sorting equipment for leaf springs includes a feeding mechanism (not shown in the figure), a main body of the equipment, a stepping conveyor mechanism, a pin insertion assembly, a leaf spring positioning mechanism, a sorting assembly, a discharging mechanism (not shown in the figure), and a hydraulic and electrical control system 4. The pin insertion assembly, leaf spring positioning mechanism, and sorting assembly are all installed on the main body of the equipment. The feeding mechanism and the discharging mechanism are respectively located on opposite sides of the main body of the equipment. The hydraulic and electrical control system 4 is connected to the feeding mechanism, the stepping conveyor mechanism, the leaf spring positioning mechanism, the sorting assembly, and the discharging mechanism through hydraulic pipelines (not shown in the figure) and cables (not shown in the figure).

[0049] Regarding the main body of the equipment: The main body of the equipment includes a workbench 1, on which a stepping conveyor mechanism is installed, corresponding to the position of the feeding mechanism and in the same conveying direction. The stepping conveyor mechanism includes a stepping conveyor body 2 and a drive motor 21 installed on the stepping conveyor body 2 for driving the stepping conveyor body 2 to run. The feeding mechanism is defined to convey from front to back. A leaf spring positioning mechanism is installed on the left side of the main body of the equipment. A pre-compression station and a sorting station are arranged sequentially on the workbench 1 along the conveying direction of the stepping conveyor body 2.

[0050] Regarding the pin assembly: There are four pin assemblies, divided into two groups of two, positioned on the left and right sides of the stepping conveyor mechanism. The four pin assemblies on each side are evenly spaced along the conveying direction of the stepping conveyor mechanism. Each pin assembly includes a first pin assembly and a second pin assembly positioned opposite each other. The first and second pin assemblies are used to fix the two lugs of the leaf spring, respectively. A leaf spring mounting bracket for installing the leaf spring is provided between the two pin assemblies.

[0051] Specifically, the first pin assembly includes a first pin base 5, on which a first pin mounting seat 6 that can slide along the conveying direction of the stepping conveyor mechanism is mounted, and a first positioning pin 7 that extends horizontally from front to back is mounted on the first pin mounting seat 6. The second pin assembly includes a second pin base 8, on which a second pin mounting seat 9 that can slide along the conveying direction of the stepping conveyor mechanism is mounted, and a second positioning pin 10 that extends horizontally from back to front is mounted on the second pin mounting seat 9.

[0052] Specifically, a first slide rail 11 is provided on the workbench 1 below the first pin base 5 and the second pin base 8. The first slide rail 11 extends to the left and right, and its extension direction is perpendicular to the conveying direction of the stepping conveyor mechanism. The first pin base 5 and the second pin base 8 are slidably mounted on the first slide rail 11.

[0053] Specifically, the first pin base 5 and the second pin base 8 are connected to an adjustment motor 12, which is connected to the hydraulic and electronic control system 4 to drive the first pin base 5 and the second pin base 8 to move under the control of the hydraulic and electronic control system 4, thereby driving the first pin assembly and the second pin assembly to move; the first pin mounting seat 6 and the second pin mounting seat 9 are both connected to the hydraulic and electronic control system 4 through hydraulic lines and cables.

[0054] Regarding the leaf spring mounting bracket: The leaf spring mounting bracket includes a support base 14, on which a support plate 15 is mounted. The top surface of the support plate 15 has a recess 16 that extends front and rear to support and position the spring lug.

[0055] Regarding the leaf spring positioning mechanism: There are two leaf spring positioning mechanisms, both located on the front side of the main body of the equipment and on the left and right sides of the stepping conveyor mechanism, respectively. The leaf spring positioning mechanism is connected to the first pin assembly and includes a lifting mechanism. The output end of the lifting mechanism is set upward, and a leaf spring mounting seat 3 is installed on its output end. The center of the top surface of the leaf spring mounting seat 3 has a recessed mounting opening 18, which is used to support and position the roller ear. Under the control of the hydraulic and electrical control system 4, the leaf spring positioning mechanism can simultaneously adjust the height (i.e., Z-axis) and horizontal position (i.e., X-axis) of the leaf spring.

[0056] Specifically, the lifting mechanism is a servo lift 17.

[0057] Regarding the sorting assembly: The sorting assembly is set on the sorting station of the workbench 1. It includes a pressure applying mechanism, a load measuring mechanism 27, a displacement measuring mechanism 28, and an automatic inkjet printing mechanism connected to the hydraulic and electronic control system 4. The pressure applying mechanism is a cylinder 19, which is used to apply a load to the leaf spring under the control of the hydraulic and electronic control system 4. The load measuring mechanism 27 is used to measure the load applied to the leaf spring and transmit the measured data to the hydraulic and electronic control system 4. The displacement measuring mechanism 28 is used to measure the displacement of the leaf spring and transmit the measured data to the hydraulic and electronic control system 4. The hydraulic and electronic control system 4 outputs the stiffness result based on the measured load and displacement data. The automatic inkjet printing mechanism is used to spray the measurement results on the leaf spring under the control of the hydraulic and electronic control system 4 after the arc height and stiffness measurements are completed.

[0058] In addition, a buffer mechanism 13 is slidably installed at the end of the leaf spring mounting bracket away from the stepping conveyor mechanism to absorb and dissipate the impact energy when the leaf spring mounting bracket moves outward; a detection switch is provided on the workbench 1 next to the pin assembly. The detection switch is used to detect whether the positioning pin is inserted into the ear hole of the ear. When the positioning pin is detected not being inserted into the ear hole, a signal is sent to the hydraulic and electronic control system 4. The hydraulic and electronic control system 4 displays the alarm signal and the location of the fault on its display and drives the alarm light connected to it to sound an alarm; protective plates 20 are provided on the front and rear sides of the top of the equipment body; protective plates 20 are installed on the left and right sides of the stepping conveyor mechanism on the rear side of the equipment body. A clamping mechanism is provided for closing the leaf spring clamp on the leaf spring. The clamping mechanism includes a mechanism base 25, a second slide rail 26 is mounted on the top surface of the mechanism base 25, a clamping seat 22 is slidably mounted on the second slide rail 26, a horizontally extending drive shaft 24 is mounted on the end of the clamping seat 22 opposite to the second pin mounting seat 9, the output end of the drive shaft 24 is set toward the second pin mounting seat 9, and a clamping block 23 is provided at the end of the drive shaft 24. The drive shaft 24 is connected to a hydraulic and electronic control system 4 so that under the control of the hydraulic and electronic control system 4, the clamping block 23 is pushed toward the second pin mounting seat 9, thereby clamping the leaf spring and fixing the leaf spring.

[0059] The working principle of the automatic sorting device for leaf springs provided by this invention is as follows:

[0060] First, the feeding mechanism transports the leaf spring to the mounting position of the stepping conveyor near the feeding mechanism. Then, the hydraulic and electrical control system 4 drives the stepping conveyor to move the leaf spring backward and place it into the mounting opening 18 of the leaf spring mounting seat 3 to complete the initial positioning of the leaf spring.

[0061] Then, the hydraulic and electronic control system 4 controls the servo lift 17 to lift the leaf spring mounting seat 3 and the leaf spring to adjust the height of the leaf spring. After the height of the leaf spring is adjusted, the hydraulic and electronic control system 4 drives the stepping conveyor to continue to convey the leaf spring to the top of the support plate 15 and move downwards so that the leaf spring is placed in the notch 16 on the support plate 15, thereby achieving secondary positioning of the leaf spring.

[0062] Next, the hydraulic and electronic control system 4 controls the first pin mounting seat 6 and the second pin mounting seat 9 to move closer together, so as to drive the first positioning pin 7 and the second positioning pin 10 to move closer together until they are inserted into the ear hole. Then, the leaf spring is placed on the pre-compression station for pre-compression. After the pre-compression is completed, the stepping conveyor body 2 transports it to the sorting station. Then, the load measuring mechanism 27 and the displacement measuring mechanism 28 perform load detection and displacement detection on the leaf spring. During the detection process, the first pin base 5 and the second pin base 8 move outward as the leaf spring is pressed down and move inward as the leaf spring recovers under the control of the hydraulic and electronic control system 4. After the detection is completed, the detected data is transmitted to the hydraulic and electronic control system 4. Then, the hydraulic and electronic control system 4 analyzes, organizes and calculates the detected data to obtain the required values ​​and draws the required curves. Then, the final detection results are transmitted to the automatic inkjet coding mechanism, which sprays the detection results on the surface of the leaf spring.

[0063] Finally, the stepping conveyor transports the inspected leaf springs to the unloading mechanism. Meanwhile, the uninspected leaf springs continue to move under the drive of the stepping conveyor, thus starting a new round of inspection. By repeating the above steps, the automatic sorting of leaf springs can be continuously carried out.

[0064] Embodiment 2 of the automatic sorting device for leaf springs provided by the present invention:

[0065] Its main difference from Example 1 is:

[0066] In Example 1, there are four pin-threading components, which are divided into two groups of two, with each group consisting of two pin-threading components positioned on the left and right sides of the stepping conveyor mechanism.

[0067] In this embodiment, the number of pin-feeding components is even, and the even number of pin-feeding components are divided into two groups and arranged on the left and right sides of the stepping conveyor mechanism.

[0068] Embodiment 3 of the automatic sorting device for leaf springs provided by the present invention:

[0069] Its main difference from Example 1 is:

[0070] In Example 1, the lifting mechanism is a servo lift.

[0071] In this embodiment, the lifting mechanism is a variable frequency motor or a hydraulic cylinder.

[0072] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0073] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. An automatic sorting apparatus for flat springs, characterized in that, The utility model relates to a kind of plate spring automatic sorting device, including: Device body, two pairs of sides are provided with feeding mechanism and discharging mechanism respectively, device body includes workbench, workbench is installed with the step conveyor mechanism corresponding with the position of feeding mechanism and the conveying direction consistent, two pairs of sides of step conveyor mechanism are installed with the pinning assembly corresponding in position, to be used for respectively fixed the both ends of leaf spring; Pinning assembly is slidably installed on workbench, pinning assembly includes oppositely arranged first pin shaft assembly and second pin shaft assembly, first pin shaft assembly is provided with leaf spring mounting bracket for installing leaf spring between second pin shaft assembly; Leaf spring positioning mechanism is arranged on the side of device body towards feeding mechanism and is connected with first pin shaft assembly, leaf spring positioning mechanism includes the lifting mechanism with output end upwards, leaf spring mounting seat is installed at the end of output end; Sorting assembly is installed on device body, sorting assembly includes pressure applying mechanism, load measuring mechanism, displacement measuring mechanism and automatic code spraying mechanism; Hydraulic and electric control system is connected with feeding mechanism, step conveyor mechanism, pinning assembly, lifting mechanism, sorting assembly and discharging mechanism; First pin shaft assembly includes first pin shaft base, first pin shaft mounting seat is slidably installed on first pin shaft base along the conveying direction of step conveyor mechanism, first positioning pin is installed on first pin shaft mounting seat and extends horizontally, second pin shaft assembly includes second pin shaft base, second pin shaft mounting seat is slidably installed on second pin shaft base along the conveying direction of step conveyor mechanism, second positioning pin is installed on second pin shaft mounting seat and extends horizontally, first positioning pin and second positioning pin are oppositely arranged, and both extend towards leaf spring mounting bracket; First slide rail is installed on workbench below first pin shaft base and second pin shaft base, and first slide rail extends along the direction perpendicular to the conveying direction of step conveyor mechanism, and first pin shaft mounting seat and second pin shaft mounting seat are slidably installed on first slide rail; Adjusting motor is connected with first pin shaft base and second pin shaft base, adjusting motor is connected with hydraulic and electric control system, to drive first pin shaft base and second pin shaft base to move under the control of hydraulic and electric control system.

2. The apparatus for automatically sorting flat springs according to claim 1, wherein The end of the leaf spring mounting bracket away from the step conveyor mechanism is slidably installed with a buffer mechanism.

3. The apparatus for automatically sorting flat springs according to claim 1, wherein The leaf spring mounting bracket includes a support seat, and a supporting plate is installed on the support seat.

4. The apparatus of claim 3, wherein The top surface of the supporting plate has a notch, and the extension direction of the notch is consistent with the extension direction of the positioning pin, to support and position the ear of the leaf spring.

5. The apparatus for automatically sorting flat springs according to claim 1, wherein The workbench is provided with a detection switch beside the pinning assembly, and the detection switch is used to detect whether the positioning pin is installed in the ear hole of the leaf spring.

6. The apparatus of claim 1, wherein The lifting mechanism is a servo lifter or a variable frequency motor or an oil cylinder.

7. The apparatus of claim 1, wherein The number of pinning assemblies is multiple, and the multiple pinning assemblies are divided into two groups and arranged on the two pairs of sides of the conveying direction of the step conveyor mechanism.

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