An angle-adjustable, stress-free quick feedback spring assembly folding control device

Abstract

This utility model discloses an angle-adjustable, stress-free, rapid feedback spring assembly bending control device. It relates to the field of electro-hydraulic servo valve technology and includes: a bending base with a threaded hole in the middle; a feedback spring assembly comprising a spring plate, a spring wire, and a sleeve, with the spring wire and sleeve both mounted on the spring plate; a left bending block with a receiving groove, the spring plate, spring wire, and sleeve all mounted within the left bending block; the bending support points of the right and left bending blocks contact the bending point of the spring wire; the right and left bending blocks are rotatably mounted on the bending base via positioning pins, the positioning pins passing through a circular hole and threadedly connected to the bending base; a right pressure block and a left pressure block are respectively mounted on the right and left bending blocks; a side pressure plate is fixed to the side wall of the left pressure block away from the left bending block by side plate screws. This utility model achieves bending of the spring wire by setting the right and left bending blocks to rotate relative to each other, without affecting the lifespan of the feedback spring assembly.

Description

Technical Field

[0001] This utility model relates to the field of electro-hydraulic servo valve technology, and more specifically to an angle-adjustable, stress-free, fast feedback spring assembly bending control device. Background Technology

[0002] The feedback spring assembly, a key component of servo valves, is primarily mounted on a torque motor and is a core element of electro-hydraulic servo valves. Its main function is to balance the feedback torque generated by the valve core movement with the motor torque, thereby ensuring that the servo valve's output flow is proportional to the input electrical control signal. If the feedback rod and spring plate in the feedback spring assembly break, the valve core movement becomes unbalanced, leading to the failure of the entire servo valve and causing the hydraulic drive unit to malfunction. Due to its crucial functional characteristics, the processing of the feedback spring assembly is critical. Currently, the processing of feedback spring assemblies mainly involves bending and welding processes.

[0003] Therefore, how to provide an angle-adjustable, stress-free, fast-bending control device for feedback spring assemblies that achieves effective bending without affecting the lifespan of the feedback assembly is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides an angle-adjustable, stress-free, fast feedback spring assembly bending control device, which aims to solve one of the problems in the background art mentioned above, to achieve effective bending of the feedback spring assembly without affecting the lifespan of the feedback assembly.

[0005] To achieve the above objectives, this utility model discloses an angle-adjustable, stress-free, fast-feedback spring assembly bending control device, comprising:

[0006] A bending base, wherein a threaded hole is provided in the middle position of the bending base;

[0007] A feedback spring assembly, comprising a spring sheet, a spring wire, and a sleeve, wherein the spring wire and the sleeve are both disposed on the spring sheet, and the spring wire is located above the sleeve;

[0008] The system includes a right bending block and a left bending block. The left bending block has a receiving groove corresponding to the spring sheet, spring wire, and sleeve, all of which are disposed within the left bending block. The right bending block has a receiving groove corresponding to the spring wire, with one end of the spring wire extending from the interior of the left bending block into the right bending block. The bending support points of the right and left bending blocks contact the bending points of the spring wire. The right and left bending blocks have a horizontal surface for connection and an inclined surface for bending on opposite sides. The right and left bending blocks are connected horizontally. Both the right and left bending blocks have round holes. The right and left bending blocks are rotatably mounted on the bending base by positioning pins. The spring wire is bent by the relative rotation of the right and left bending blocks. The positioning pin passes through the round holes and is threaded to the bending base. The right and left bending blocks are respectively provided with right pressure blocks and left pressure blocks. The right pressure blocks and left pressure blocks are fixed to the side walls of the right and left bending blocks that are far apart from each other by pressure block screws.

[0009] A side pressure plate is fixed to the side wall of the left pressure block away from the left bending block by side plate screws.

[0010] Furthermore, the right bending block and the left bending block are respectively provided with a boss and a groove, and the right bending block and the left bending block are connected as a whole by inserting the boss and the groove, and the positioning pin passes through the boss and the groove.

[0011] Furthermore, the side pressure plate is fixed to the side wall of the left pressure block away from the left bending block by four side plate screws.

[0012] Furthermore, the right bending block and the bending support point where the right bending block contacts the spring wire are set in an arc transition shape.

[0013] Furthermore, the positioning pin is connected to the bending base by a thread.

[0014] Furthermore, the left bending block is provided with an adjusting screw. The adjusting screw is screwed out of the inclined surface of the left bending block and contacts the inclined surface of the right bending block. The bending angle of the spring wire is adjusted by changing the extension length of the adjusting screw.

[0015] As can be seen from the above technical solution, compared with the prior art, this utility model discloses an angle-adjustable, stress-free, fast-feedback spring assembly bending control device, the beneficial effects of which are:

[0016] This adjustable angle bending device can achieve more efficient bending of the feedback spring assembly. The bending angle, bending point, and fillet radius of the bending point of the feedback spring assembly can all be guaranteed by this device, which can accurately meet the design requirements of the product parts, reduce the error of manual operation, meet the needs of mass production, and speed up production efficiency.

[0017] Furthermore, the deflection value of the feedback spring assembly processed by this bending device meets the product usage requirements, the appearance quality of the parts is good, the service life is significantly improved, and the service life of the servo valve can be greatly extended. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A front view of the angle-adjustable, stress-free, fast-feedback spring assembly bending control device provided by this utility model;

[0020] Figure 2 Top view of the angle-adjustable, stress-free, fast-feedback spring assembly bending control device provided by this utility model;

[0021] Figure 3 Left view of the angle-adjustable, stress-free, fast-feedback spring assembly bending control device provided by this utility model;

[0022] Figure 4 Right view of the angle-adjustable, stress-free, fast-feedback spring assembly bending control device provided by this utility model;

[0023] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0024] Figure 6 A bending diagram of the angle-adjustable, stress-free, fast-feedback spring assembly bending control device provided by this utility model;

[0025] Figure 7 for Figure 6 Enlarged diagram of point A in the middle.

[0026] Wherein: 1 is the right pressure block; 2 is the side pressure plate; 3 is the right bending block; 4 is the bending base; 5 is the pressure block screw; 6 is the cylindrical pin; 7 is the feedback spring assembly; 8 is the left pressure block; 9 is the left bending block; 10 is the positioning pin; 11 is the side plate screw; 12 is the adjusting screw. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] See Figure 1-7 This utility model discloses an angle-adjustable, stress-free, fast-feedback spring assembly bending control device, comprising:

[0029] The bending base 4 has a threaded hole in the middle.

[0030] Feedback spring assembly 7 includes a spring plate, a spring wire, and a sleeve. The spring wire and the sleeve are both mounted on the spring plate, with the spring wire positioned above the sleeve. The spring plate, spring wire, and sleeve are connected by welding. As one of the main components of the servo valve, the main function of feedback spring assembly 7 is to balance the feedback torque generated by the valve core movement with the motor torque, thereby enabling the servo valve to achieve a proportional output flow rate to the input electrical control signal.

[0031] Right bending block 3 and left bending block 9. Left bending block 9 has a receiving groove corresponding to the spring sheet, spring wire, and sleeve. The spring sheet, spring wire, and sleeve are all located inside left bending block 9. Right bending block 3 has a receiving groove corresponding to the spring wire. One end of the spring wire extends from inside left bending block 9 into right bending block 3. The bending support points of right bending block 3 and left bending block 9 contact the bending point of the spring wire. Opposite sides of right bending block 3 and left bending block 9 have a horizontal surface for connection and an inclined surface for bending. The horizontal surfaces of right bending block 3 and left bending block 9 are connected. Both right bending block 3 and left bending block 9 have round holes. The bending block 9 is rotatably mounted on the bending base 4 via the positioning pin 10. The spring wire is bent by the relative rotation of the right bending block 3 and the left bending block 9. The positioning pin 10 passes through the round hole and is threadedly connected to the bending base 4. The right bending block 3 and the left bending block 9 are respectively provided with a right pressure block 1 and a left pressure block 8. The right pressure block 1 and the left pressure block 8 are fixed to the side walls of the right bending block 3 and the left bending block 9 that are far apart from each other by pressure block screws 5. The spring wire is bent by the relative rotation of the bending block and the left bending block 9. The left pressure block 8 and the right pressure block 1 are used to press down the feedback spring assembly 7 to prevent the whole assembly from tilting during bending.

[0032] Side pressure plate 2 is fixed to the side wall of the left pressure block 8 away from the left bending block 9 by side plate screws 11; the side pressure plate 2 is used to press down the feedback spring assembly 7 to prevent the whole assembly from shaking when it bends.

[0033] In this embodiment, the right bending block 3 and the left bending block 9 are respectively provided with a boss and a groove. The right bending block 3 and the left bending block 9 are connected as a whole by inserting the boss and the groove. The positioning pin 10 passes through the boss and the groove, and the right bending block 3 and the left bending block 9 are connected as a whole by the boss and the groove.

[0034] In this embodiment, the side pressure plate 2 is fixed to the side wall of the left pressure block 8 away from the left bending block 9 by four side plate screws 11.

[0035] In this embodiment, the right bending block 3 and the bending support point where the right bending block 3 contacts the spring wire are set as arc transitions; this ensures the lifespan of the feedback rod and prevents stress concentration at the bending point.

[0036] In this embodiment, the positioning pin 10 is connected to the bending base 4 by a thread.

[0037] In this embodiment, the left bending block 9 is provided with an adjusting screw 12. The adjusting screw 12 is screwed out so that the inclined surface of the left bending block 9 contacts the inclined surface of the right bending block 3. The bending angle of the spring wire is adjusted by changing the extension length of the adjusting screw 12.

[0038] In addition, in this embodiment, the slender portions of the receiving grooves for placing the spring wire in the left bending block 9 and the right bending block 3 are matched with the size of the spring wire and are 0.02 to 0.05 mm larger than the size of the spring wire.

[0039] The left pressure block 8 and the right pressure block 1 are also provided with cylindrical pins 6, which connect the left pressure block 8 and the right pressure block 1 to the left bending block 9 and the right bending block 3 through the cylindrical pins 6.

[0040] When processing the left bending block 9, right bending block 3, left pressure block 8, and right pressure block 1, all countersunk holes, elongated holes, and screw holes are processed in one clamping. Then, the holes are centered and cut open using wire cutting. Threaded holes do not need to be cut open to ensure the consistency and symmetry of each component. Finally, the outlines of the left and right bending blocks 3 and left and right pressure blocks 1 are cut by wire cutting.

[0041] like Figure 6 As shown, by controlling the adjusting screw 12 of the left bending block 9 to adjust to the angle we want to process, and then rotating the right bending block 3, the bending angle of the feedback spring assembly 7 can be processed, where θ is the bending angle. Figure 7 As shown, the bending point A should be a rounded transition, and the fillet R here should be consistent with the fillet R of the feedback spring assembly 7. This can effectively prevent the feedback spring assembly 7 from being damaged by pressure, improve the appearance quality of the feedback assembly, and greatly extend the service life of the feedback spring assembly 7, thus achieving the purpose of this utility model device.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bending control device for an angle-adjustable, stress-free, fast-feedback spring assembly, characterized in that, include: A bending base, wherein a threaded hole is provided in the middle position of the bending base; A feedback spring assembly, comprising a spring sheet, a spring wire, and a sleeve, wherein the spring wire and the sleeve are both disposed on the spring sheet, and the spring wire is located above the sleeve; The system includes a right bending block and a left bending block. The left bending block has a receiving groove corresponding to the spring sheet, spring wire, and sleeve, all of which are disposed within the left bending block. The right bending block has a receiving groove corresponding to the spring wire, with one end of the spring wire extending from the interior of the left bending block into the right bending block. The bending support points of the right and left bending blocks contact the bending points of the spring wire. The right and left bending blocks have a horizontal surface for connection and an inclined surface for bending on opposite sides. The right and left bending blocks are connected horizontally. Both the right and left bending blocks have round holes. The right and left bending blocks are rotatably mounted on the bending base by positioning pins. The spring wire is bent by the relative rotation of the right and left bending blocks. The positioning pin passes through the round holes and is threaded to the bending base. The right and left bending blocks are respectively provided with right pressure blocks and left pressure blocks. The right pressure blocks and left pressure blocks are fixed to the side walls of the right and left bending blocks that are far apart from each other by pressure block screws. A side pressure plate is fixed to the side wall of the left pressure block away from the left bending block by side plate screws.

2. The angle-adjustable, stress-free, fast-feedback spring assembly bending control device according to claim 1, characterized in that, The right bending block and the left bending block are respectively provided with a boss and a groove. The right bending block and the left bending block are connected as a whole by inserting the boss and the groove. The positioning pin passes through the boss and the groove.

3. The angle-adjustable, stress-free, rapid feedback spring assembly bending control device according to claim 1, characterized in that, The side plate is fixed to the side wall of the left pressure block away from the left bending block by four side plate screws.

4. The angle-adjustable, stress-free, fast-feedback spring assembly bending control device according to claim 3, characterized in that, The right bending block and the bending support point where the right bending block contacts the spring wire are set in an arc transition shape.

5. The angle-adjustable, stress-free, fast-feedback spring assembly bending control device according to claim 1, characterized in that, The positioning pin is connected to the bending base by a thread.

6. The angle-adjustable, stress-free, fast-feedback spring assembly bending control device according to claim 1, characterized in that, The left bending block is equipped with an adjusting screw. The adjusting screw is screwed out of the inclined surface of the left bending block and contacts the inclined surface of the right bending block. The bending angle of the spring wire is adjusted by changing the extension length of the adjusting screw.

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