A ejector rod structure, a relay having the ejector rod structure and a mounting method thereof

Abstract

A kind of ejector rod structure, including rod, and the upper limiting structure and lower limiting structure for limiting moving contact plate and moving iron core are arranged at the both ends of rod, it is characterized in that: the upper limiting structure and lower limiting structure all include limiting plate and tensioner, the limiting plate is coaxially sleeved at the both ends of rod, the both ends of rod are also respectively axially set up an installation hole, the tensioner is installed in the installation hole of rod, and tensioner at least partially with the installation hole of rod interference fit, to make rod outward expand and with limiting plate interference fit, the both ends of rod are also provided with for limiting tensioner package cut structure.This ejector rod structure is not easy to deform, not easy to fall off.In addition, a kind of relay and its installation method are provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, in particular to a ejector rod structure, a relay with the ejector rod structure and a mounting method thereof. BACKGROUND

[0002] The existing relays generally include a shell, a static iron core, a moving iron core, an ejector rod and a moving contact plate arranged in the shell, the moving contact plate, the static iron core and the moving iron core are mounted on the ejector rod from top to bottom, the static iron core is fixed in the shell and movably connected with the ejector rod, the moving iron core and the moving contact plate are limited on the ejector rod and move together with the ejector rod, and upper and lower limiting structures for limiting the moving contact plate and the moving iron core are arranged at two ends of the ejector rod.

[0003] However, the existing ejector rod structure has the following technical problems: the upper and lower limiting structures are generally in the form of spin riveting, upset riveting or C-shaped snap ring; the spin riveting form is prone to deformation of the ejector rod as a whole, because the ejector rod is generally made of aluminum material, which is relatively soft, and the length of the ejector rod is relatively long, and the deformation is prone to occur during spin riveting; the upset riveting form requires high material quality of the ejector rod, which is generally made of stainless steel, but the steel material is a weak magnetic material, which affects the attraction and release performance of the relay, and the equipment for upset riveting also requires a high running height of ±0.05mm, and the ejector rod is prone to deformation when the running height exceeds the range. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an ejector rod structure which is not prone to deformation and falling off.

[0005] The technical solution of the present application is: an ejector rod structure, comprising a rod member and upper and lower limiting structures for limiting a moving contact plate and a moving iron core arranged at two ends of the rod member, characterized in that: the upper and lower limiting structures each comprise a limiting plate and a tensioning member, the limiting plate is coaxially sleeved at the two ends of the rod member, two end faces of the rod member are also respectively axially provided with an installation hole, the tensioning member is installed in the installation hole of the rod member, and the tensioning member is at least partially in interference fit with the installation hole of the rod member, so that the rod member is outwardly expanded to interfere with the limiting plate, and the two ends of the rod member are also provided with a package cutting structure for limiting the tensioning member.

[0006] After adopting the above structure, the present application has the following advantages:

[0007] The top rod structure only needs to set the expansion element to be at least partially in interference fit with the mounting hole of the rod element, so that the rod element is expanded outward after the expansion element is installed to realize the interference fit between the rod element and the limiting plate, thereby fixing the limiting plate on the rod element, and the expansion element is also fixed in the rod element through the clamping structure of the rod element; since the whole is not provided with a spin riveting structure or a flip riveting structure, the top rod structure is not easy to deform, and the interference fit structure and the clamping structure are also very firm for fixing the limiting plate and the expansion element, and are not easy to fall off in vibration.

[0008] Preferably, the rod element is made of aluminum material. The aluminum material is relatively soft, which is beneficial to the expansion element to expand the rod element outward after installation, and also facilitates the clamping process; in addition, the aluminum material does not affect the attraction and release performance of the relay, so that the product has high performance.

[0009] Preferably, the expansion element includes a large end and a small end, and a step surface is formed at the connection between the large end and the small end, the large end is closer to the hole bottom of the mounting hole than the small end after the expansion element is installed, and the outer diameter of the large end is at least partially greater than the inner diameter of the mounting hole, so that the expansion element is at least partially in interference fit with the mounting hole of the rod element, and the clamping structure abuts against the step surface of the expansion element. This setting can make the installation of the expansion element more labor-saving and reliable.

[0010] Preferably, the outer diameter of the large end of the expansion element gradually decreases in the direction away from the small end and is less than the inner diameter of the mounting hole. This setting can make the installation of the expansion element more labor-saving.

[0011] Preferably, at least one notch is further arranged on the outer side wall of the rod element at both ends, and the notch is spaced apart from the clamping structure by a gap and is closer to the end of the rod element than the clamping structure. This setting facilitates the installation of the expansion element while minimizing the impact on the strength of the top rod.

[0012] Preferably, the part of the outer side wall of the rod element located in the moving iron core is axially provided with a knurled structure in interference fit with the moving iron core. This setting can better combine the moving iron core and the top rod, so that the top rod and the moving iron core do not shake during subsequent clamping process, thereby avoiding processing errors.

[0013] Another technical problem to be solved by the present application is to provide a relay which is not easy to deform and fall off.

[0014] The technical solution of the present application is: a relay, comprising a shell, a static iron core, a moving iron core and a moving contact plate arranged in the shell, characterized in that: the top rod structure is further included, the moving contact plate, the static iron core and the moving iron core are installed on the rod element from top to bottom, the static iron core is fixed in the shell and movably connected with the rod element, the top of the moving contact plate is limited below the limiting plate at the upper end of the rod element, and the bottom of the moving iron core is limited above the limiting plate at the lower end of the top rod.

[0015] After adopting the above structure, the present application has the following advantages:

[0016] The relay of the present application only needs to set the interference fit between the expansion member and the mounting hole of the rod member, so that the rod member is expanded outward after the installation of the expansion member to realize the interference fit between the rod member and the limiting plate, thereby fixing the limiting plate on the rod member, and the expansion member is also fixed in the rod member through the wrap-cut structure of the rod member; since the whole does not set the spin-riveting structure or the flip-riveting structure, the top rod structure is not easy to deform, and the relay including the top rod structure is also not easy to deform, and in addition, the interference fit structure and the wrap-cut structure are very firm for the fixation of the limiting plate and the expansion member, and are not easy to fall off in vibration.

[0017] Another technical problem to be solved by the present application is to provide an installation method of a relay, which is not easy to deform and fall off after installation.

[0018] The technical solution of the present application is: an installation method of a relay, which adopts the above top rod structure, and is characterized in that it comprises the following steps:

[0019] (1) passing the rod member through the moving contact plate, the static iron core and the moving iron core;

[0020] (2) respectively sleeving the two limiting plates on both ends of the rod member, and installing the expansion member into the mounting holes at both ends of the rod member, the expansion member being at least partially interference fit with the mounting holes, so that the rod member is expanded outward and interference fit with the two limiting plates, at this time, the two limiting plates are respectively fixed and abut against the top of the moving contact plate and the bottom of the moving iron core;

[0021] (3) performing a wrap-cut process on both ends of the rod member to form a wrap-cut structure for limiting the expansion member.

[0022] After adopting the above method, the present application has the following advantages:

[0023] The installation method of the relay of the present application only needs to set the interference fit between the expansion member and the mounting hole of the rod member, so that the rod member is expanded outward after the installation of the expansion member to realize the interference fit between the rod member and the limiting plate, thereby fixing the limiting plate on the rod member, and the expansion member is also fixed in the rod member through the wrap-cut structure of the rod member; since the whole does not set the spin-riveting structure or the flip-riveting structure, the top rod structure is not easy to deform, and in addition, the interference fit structure and the wrap-cut structure are very firm for the fixation of the limiting plate and the expansion member, and are not easy to fall off in vibration.

[0024] Preferably, the tensioning member includes a large end and a small end, and the connection between the large end and the small end forms a stepped surface. In step (2), after the tensioning member is installed into the mounting holes at both ends of the rod, the large end is closer to the bottom of the mounting hole than the small end, and at least part of the outer diameter of the large end is larger than the inner diameter of the mounting hole, so that the tensioning member is at least partially interference-fitted with the mounting hole of the rod. The wrapping structure formed in step (3) abuts against the stepped surface of the tensioning member. This setting makes the installation of the tensioning member easier and less strenuous, and the fixation is also more reliable.

[0025] Preferably, in step (1), after the rod passes through the moving iron core, the outer surface of the rod is fitted with the moving iron core through a knurled structure. This arrangement allows the moving iron core and the push rod to better engage, thereby preventing the push rod and the moving iron core from shaking and causing processing errors during the subsequent wrapping process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the push rod structure in Example 1;

[0027] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0028] Figure 3 This is an axial half-sectional view of the push rod structure in Example 1;

[0029] Figure 4 for Figure 3 A magnified view of a portion of point B in the middle;

[0030] Figure 5 This is a schematic diagram of the tensioner in Example 1;

[0031] Figure 6 This is an axial half-sectional view of the relay in Example 2;

[0032] Figure 7 This is an axial half-sectional view of the main components of the relay in Example 2;

[0033] In the diagram: 1-rod, 2-upper limit structure, 3-lower limit structure, 4-limiting plate, 5-tensioning component, 6-mounting hole, 7-wrapping structure, 8-large end of tensioning component, 9-small end of tensioning component, 10-stepped surface, 11-notch, 12-knurled structure, 13-outer shell, 14-stationary iron core, 15-moving iron core, 16-moving contact plate, 17-T-type bushing, 18-spring cover plate, 19-compression spring, 20-reset spring, 21-annular groove, 22-first spring seat, 23-second spring seat, 24-third spring seat. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Embodiment 1

[0036] A top rod structure comprises a rod 1, and upper and lower limiting structures 2 and 3 arranged at both ends of the rod 1 for limiting a moving contact plate 16 and a moving iron core 15, the upper and lower limiting structures 2 and 3 each comprise a limiting plate 4 and a tensioning piece 5, the limiting plate 4 is coaxially sleeved at both ends of the rod 1, both end faces of the rod 1 are respectively axially provided with a mounting hole 6, the tensioning piece 5 is mounted in the mounting hole 6 of the rod 1, and the tensioning piece 5 is at least partially in interference fit with the mounting hole 6 of the rod 1, so that the rod 1 is outwardly expanded to be in interference fit with the limiting plate 4, both ends of the rod 1 are further provided with a wrap-cut structure 7 for limiting the tensioning piece 5, the wrap-cut process is a prior art, the wrap-cut structure 7 plays a blocking role to prevent the tensioning piece 5 from falling out of the rod 1, if the outer side surface of the entire tensioning piece 5 is flat and no step surface 10 is arranged, taking the tensioning piece 5 mounted at the upper end of the rod 1 as an example, the wrap-cut structure 7 should be formed above the top of the tensioning piece 5 and abut against each other.

[0037] The rod 1 is made of aluminum material; the tensioning piece 5 comprises a large head end 8 and a small head end 9, and a step surface 10 is formed at the connection between the large head end 8 and the small head end 9, after installation, the large head end 8 is closer to the hole bottom of the mounting hole 6 than the small head end 9, at least a part of the outer diameter of the large head end 8 is greater than the inner diameter of the mounting hole 6, so that the tensioning piece 5 is in interference fit with the mounting hole 6 of the rod 1, the wrap-cut structure 7 abuts against the step surface 10 of the tensioning piece 5; the outer diameter of the large head end 8 of the tensioning piece 5 gradually decreases in the direction away from the small head end 9 and is reduced to be less than the inner diameter of the mounting hole 6; at least one notch 11 is further arranged on the outer side wall of both ends of the rod 1, the notch 11 is spaced apart from the wrap-cut structure 7 by a gap and is closer to the end of the rod 1 than the wrap-cut structure 7; a knurl structure 12 in interference fit with the moving iron core 15 is axially arranged on the outer side wall of the rod 1 and located in the moving iron core 15.

[0038] Embodiment 2

[0039] A relay comprises a housing 13, a static iron core 14, a moving iron core 15 and a moving contact plate 16 arranged in the housing 13, and the top rod structure in the embodiment 1, the moving contact plate 16, the static iron core 14 and the moving iron core 15 are mounted on the rod member 1 from top to bottom, the static iron core 14 is fixed in the housing 13 and movably connected with the rod member 1, the top of the moving contact plate 16 is limited below the limiting plate 4 at the upper end of the rod member 1, and the bottom of the moving iron core 15 is limited above the limiting plate 4 at the lower end of the top rod, in addition, the relay further comprises a T-shaped bushing 17, a spring cover plate 18, a pressure spring 19 and a return spring 20, the mounting structure of these components is the prior art, in the embodiment, the big end of the T-shaped bushing 17 faces upward and is installed between the shaft hole of the moving contact plate 16 and the outer side of the rod member 1, the spring cover plate 18 is installed between the moving contact plate 16 and the static iron core 14, and the annular groove 21 for limiting the moving contact plate 16 is formed between the T-shaped bushing 17 and the spring cover plate 18, the pressure spring 19 is installed between the spring cover plate 18 and the first spring seat 22 at the top of the static iron core 14, the return spring 20 is installed between the second spring seat 23 at the bottom of the static iron core 14 and the third spring seat 24 at the top of the moving iron core 15, in the initial state, the return spring 20 downwardly presses the moving iron core 15 to limit it above the limiting plate 4 at the lower end of the rod member 1, the pressure spring 19 upwardly presses the spring cover plate 18 and the moving contact plate 16 to limit the moving contact plate 16 below the limiting plate 4 at the upper end of the rod member 1, in fact, the limiting plate 4 at the upper end of the rod member 1 abuts against the big end of the T-shaped bushing 17 installed in the shaft hole of the moving contact plate 16.

[0040] Embodiment 3

[0041] A mounting method of a relay, which adopts the top rod structure described in the embodiment 1, and comprises the following steps:

[0042] (1) passing the rod member 1 through the moving contact plate 16, the static iron core 14 and the moving iron core 15;

[0043] (2) sleeving two limiting plates 4 on both ends of the rod member 1 respectively, and installing the tensioning members 5 into the mounting holes 6 at both ends of the rod member 1, the tensioning members 5 at least partially fit with the mounting holes 6, so that the rod member 1 is outwardly expanded and fits with the two limiting plates 4, at this time, the two limiting plates 4 are fixed and abut against the top of the moving contact plate 16 and the bottom of the moving iron core 15 respectively;

[0044] (3) performing a bag cutting process on both ends of the rod member 1 to form bag cutting structures 7 for limiting the tensioning members 5.

[0045] In the embodiment, the tension member 5 comprises a large end 8 and a small end 9, and a step surface 10 is formed at the joint of the large end 8 and the small end 9. After the tension member 5 is installed into the mounting hole 6 at both ends of the rod member 1 in step (2), the large end 8 is closer to the hole bottom of the mounting hole 6 than the small end 9, and the outer diameter of the large end 8 is at least partially larger than the inner diameter of the mounting hole 6, so that the tension member 5 is at least partially in interference fit with the mounting hole 6 of the rod member 1, and the clamping structure 7 formed in step (3) abuts against the step surface 10 of the tension member 5.

[0046] In the embodiment, after the rod member 1 is threaded through the moving iron core 15 in step (1), the outer side surface of the rod member 1 is in interference fit with the moving iron core 15 through the knurl structure 12.

Claims

1. A ejector rod structure, comprising a rod (1), and an upper limiting structure (2) and a lower limiting structure (3) arranged at both ends of the rod (1) for limiting a moving contact plate (16) and a moving iron core (15) respectively, characterized in that: The upper limit structure (2) and the lower limit structure (3) each include a limiting plate (4) and a tensioning piece (5), the limiting plate (4) is coaxially sleeved on both ends of the rod piece (1), both end faces of the rod piece (1) are also respectively axially provided with an installation hole (6), the tensioning piece (5) is installed in the installation hole (6) of the rod piece (1), and the tensioning piece (5) is at least partially in interference fit with the installation hole (6) of the rod piece (1), so that the rod piece (1) is outwardly expanded to be in interference fit with the limiting plate (4), both ends of the rod piece (1) are also provided with a cutting structure (7) for limiting the tensioning piece (5); the tensioning piece (5) includes a large head end (8) and a small head end (9), and a step surface (10) is formed at the connection between the large head end (8) and the small head end (9), after installation, the large head end (8) is closer to the hole bottom of the installation hole (6) than the small head end (9), and at least part of the outer diameter of the large head end (8) is greater than the inner diameter of the installation hole (6), and the cutting structure (7) is abutted on the step surface (10) of the tensioning piece (5).

2. The ejector rod structure of claim 1, wherein: The rod piece (1) is made of aluminum material.

3. The ejector rod structure of claim 1, wherein: The outer diameter of the large head end (8) of the tensioning piece (5) gradually decreases in the direction away from the small head end (9) and is less than the inner diameter of the installation hole (6).

4. The ejector rod structure of claim 1, wherein: At least one notch (11) is further provided on the outer side wall of both ends of the rod piece (1), the notch (11) is spaced from the cutting structure (7) by a gap, and the notch (11) is closer to the end of the rod piece (1) than the cutting structure (7).

5. The ejector rod structure of claim 1, wherein: The outer side wall of the rod piece (1) and the part located in the moving iron core (15) are axially provided with a knurl structure (12) in interference fit with the moving iron core (15).

6. A relay comprising a housing (13) and a static core (14), a moving core (15) and a moving contact plate (16) arranged in the housing (13), characterized in that: The method further comprises the following steps:

7. A method of installing a relay using the ejector rod structure according to claim 1, characterized by: Step (1): the rod piece (1) is passed through the moving contact plate (16), the static iron core (14) and the moving iron core (15); Step (2): two limiting plates (4) are respectively sleeved on both ends of the rod piece (1), and the tensioning piece (5) is installed in the installation hole (6) of both ends of the rod piece (1), and the tensioning piece (5) is at least partially in interference fit with the installation hole (6), so that the rod piece (1) is outwardly expanded and the rod piece (1) is in interference fit with the two limiting plates (4), at this time, the two limiting plates (4) are respectively fixed and abutted on the top of the moving contact plate (16) and the bottom of the moving iron core (15); Step (3): the cutting process is performed on both ends of the rod piece (1) to form the cutting structure (7) for limiting the tensioning piece (5). After the rod piece (1) is passed through the moving iron core (15) in the step (1), the outer side wall of the rod piece (1) is in interference fit with the moving iron core (15) through the knurl structure (12).

8. A method of mounting a relay according to claim 7, wherein: ​

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