CN112589729A

CN112589729A - Armature component press-fit device of electro-hydraulic servo valve

Info

Publication number: CN112589729A
Application number: CN202011497493.6A
Authority: CN
Inventors: 陈冬冬; 金瑶兰; 渠立鹏; 陈晓萌; 余萍; 缑振
Original assignee: Shanghai Hengtuo Hydraulic Control Technology Co ltd
Current assignee: Shanghai Hengtuo Hydraulic Control Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-02

Abstract

The invention relates to a press-fit device of an armature component of an electro-hydraulic servo valve, which comprises an armature, a base and a feedback rod, wherein the middle of the upper surface of the base is connected with a spring pipe through a half block, the excircle of the half block is sleeved with a half positioning sleeve, the excircle of the half block is embedded into a circular slot hole of the base for positioning connection, and the base and the half block are clamped through the half positioning sleeve, so that a straight slot on the upper surface of the half positioning sleeve is vertical to the spring pipe; the armature is fixedly connected in a positioning fit mode in the linear groove, the lower end of the armature extends into the half block and is connected with the excircle of the spring tube in an interference fit mode, the inner hole of the spring tube is connected with the baffle in an interference fit mode, the lower end of the baffle extends into the bottom of the half block, and the lower surface of the step of the baffle is flush with the upper end surface of the spring tube; the feedback rod is connected in the inner hole of the baffle in an interference fit mode, and the lower end of the feedback rod extends into the base. The press-fit device can effectively improve the press-fit precision and efficiency of the armature component, and lays a foundation for realizing the stress-free press-fit of the armature component.

Description

Armature component press-fit device of electro-hydraulic servo valve

Technical Field

The invention relates to an armature component of an electro-hydraulic servo valve, in particular to a press-fit device of the armature component.

Background

The electro-hydraulic servo valve is an automatic high-technology product integrating machinery, hydraulic pressure, electronics and sensing, is widely applied to the fields of precision instruments, aerospace, aviation, ships and the like, and is a key control component in the systems. The torque motor in the electro-hydraulic servo valve is used as a core component of the electro-hydraulic servo valve and mainly plays a role in electro-hydraulic conversion; the torque motor mainly comprises coil assembly, armature assembly, magnetic steel, motor shell assembly and other parts, wherein the armature assembly plays a role in electromagnetic transmission in the torque motor, and the performance of the whole torque motor is determined by the quality of the armature assembly in the assembling process so as to ensure the performance of the whole servo valve, therefore, the armature assembly is ensured to have no stress in the press-fitting process, and the torque motor is ensured to work reliably and stably.

Chinese patent CN104827441B, 2017-01-04 discloses a high-precision press-fit device for an armature component of an electro-hydraulic servo valve, wherein the armature component comprises a baffle, a pipe spring, an armature and a feedback rod which are sequentially press-fitted; the press-fit device includes: the central part is provided with a longitudinal through hole, a positioning block for placing the positioning baffle is arranged in the hole, and the positioning block is provided with a press-fit hole for the pipe spring to extend into; the top of the adjusting base is propped against the positioning block to drive the adjusting base to move up and down; the pipe spring auxiliary clamping guide mechanism comprises at least two transverse through holes which are arranged on the central piece and are centrosymmetric relative to the longitudinal through hole, and a sliding positioning stop block which can extend into the longitudinal through hole to abut against the pipe spring is arranged in each through hole in a sliding mode; the armature floating support positioning mechanism comprises two elastic piece placing holes which are arranged on the central piece and are bilaterally symmetrical relative to the longitudinal through hole, and elastic pieces and armature support positioning blocks arranged on the elastic pieces are arranged in the elastic pieces. The device can assist the manual work to carry out the pressure of armature subassembly and press, improves greatly and presses and press precision and production efficiency. However, the press-fit device has a complex structure, a plurality of parts are used, the assembly precision requirement is high, particularly, the armature floating support positioning mechanism is difficult to ensure that the feedback rod is perpendicular to the press-fit plane, and the armature component can not be pressed without stress to ensure the reliable and stable work of the torque motor.

Disclosure of Invention

The invention provides a press-fit device for an armature component of an electro-hydraulic servo valve, which is used for meeting the requirement of stress-free press-fit of the armature component of the electro-hydraulic servo valve.

In order to achieve the purpose, the technical scheme of the invention is as follows: a press-fit device for an armature component of an electro-hydraulic servo valve comprises an armature, a base and a feedback rod, wherein the middle of the upper surface of the base is connected with a spring pipe through a half block, a half positioning sleeve is sleeved on the outer circle of the half block, the outer circle of the half block is embedded into a circular groove hole of the base to be positioned and connected, and the base and the half block are clamped through the half positioning sleeve, so that a straight groove on the upper surface of the half positioning sleeve is perpendicular to the spring pipe; the armature is fixedly connected in a positioning fit mode in the linear groove, the lower end of the armature extends into the half block and is connected with the excircle of the spring tube in an interference fit mode, the inner hole of the spring tube is connected with the baffle in an interference fit mode, the lower end of the baffle extends into the bottom of the half block, and the lower surface of the step of the baffle is flush with the upper end surface of the spring tube; the feedback rod is connected in the inner hole of the baffle in an interference fit mode, and the lower end of the feedback rod extends into the base.

Furthermore, the half module is composed of two half blocks which are fixedly connected through two pins.

Furthermore, the half positioning set is composed of two half positioning sets.

Furthermore, the two half locating sleeves are fixedly connected together through the outer sleeve.

The invention has the beneficial effects that:

according to the invention, through the test verification of the actual armature component assembly, the press-fit precision and efficiency of the armature component can be effectively improved by adopting the armature component press-fit device, and the foundation is laid for realizing the stress-free press-fit of the armature component. The device is applied to the electro-hydraulic servo valve, can effectively improve the accuracy and efficiency of the armature component press fit, and achieves good effect.

Drawings

Fig. 1 is a front sectional view of an assembly structure of an armature assembly press-fit device of the present invention;

FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 3 is a top view of fig. 1.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1 to 3, the armature assembly press-fit device of the electro-hydraulic servo valve of the present invention includes an armature 1, a baffle 2, a spring tube 3, a huff block 4, an outer sleeve 5, a huff positioning set 6, a base 7, a pin 8, and a feedback rod 9. The huff block 4 is composed of two half huff blocks. The half positioning set 6 is composed of two half positioning sets.

The spring tube 3 is placed in one half of the half-half block, the top cylinder of the half block props against the spring tube 3, the shape of the spring tube 3 is fixed through an inner groove 4 of the half block, and the half block is positioned and fixed with the other half of the half block through two pins 8; the fixed half block 4 and the spring tube 3 are placed in a base 7, the outer circle of the half block 4 is embedded into a circular groove hole of the base 7 for limiting, the base 7 and the half block are clamped by half; after the fixing is finished, the armature 1 is placed in a linear groove on the upper surface of the half positioning set 6, the press-fit position of the armature 1 is positioned through the linear groove, and the armature 1 is press-fitted to the excircle of the spring tube 3 in an interference manner through a pressure head after the positioning is finished, so that the interference press-fit dosage of the inner hole of the armature 1 and the excircle of the spring tube 3 is ensured; after the armature 1 and the spring tube 3 are subjected to interference press fit, selecting the baffle 2 to ensure the interference magnitude between the excircle size of the baffle and the inner hole of the spring tube 3, placing the baffle into the inner hole of the spring tube 3, and performing interference press fit on the baffle 2 to the bottom through a pressure head to ensure that the baffle 2 is flush with the spring tube 3; 2 press-fits the completion back, puts into 2 insides of baffle with feedback rod 9, guarantees that feedback rod 9 perpendicular to presses and joins in marriage the plane, presses the interference of feedback rod 9 to press to the bottom through the pressure head.

Claims

1. The utility model provides an electro-hydraulic servo valve armature subassembly pressure is pressed and is joined in marriage device, includes armature, base, feedback pole, its characterized in that: the middle of the upper surface of the base is connected with a spring pipe through a half block, a half positioning sleeve is sleeved on the outer circle of the half block, the outer circle of the half block is embedded into a circular groove hole of the base for positioning connection, and the base and the half block are clamped through the half positioning sleeve, so that a straight groove on the upper surface of the half positioning sleeve is perpendicular to the spring pipe; the armature is fixedly connected in a positioning fit mode in the linear groove, the lower end of the armature extends into the half block and is connected with the excircle of the spring tube in an interference fit mode, the inner hole of the spring tube is connected with the baffle in an interference fit mode, the lower end of the baffle extends into the bottom of the half block, and the lower surface of the step of the baffle is flush with the upper end surface of the spring tube; the feedback rod is connected in the inner hole of the baffle in an interference fit mode, and the lower end of the feedback rod extends into the base.

2. The electro-hydraulic servo valve armature assembly press-fit apparatus of claim 1, wherein: the half module is composed of two half blocks which are fixedly connected through two pins.

3. The electro-hydraulic servo valve armature assembly press-fit apparatus of claim 1, wherein: the half positioning set consists of two half positioning sets.

4. The electro-hydraulic servo valve armature assembly press-fit apparatus of claim 3, wherein: the two half locating sleeves are fixedly connected together through the outer sleeve.