Pushing structure and relay

Abstract

The invention relates to the technical field of electronic control devices, in particular to a pushing structure and a relay. The pushing structure comprises a pushing rod, the pushing rod is provided with a first end and a second end, and an annular groove is formed in the circumferential surface of the pushing rod and used for installing a check ring; in the axial direction of the push rod, the vertical distances between the groove bottom of the annular groove and the axis of the push rod are not completely equal; the check ring can abut against the set position of the groove bottom of the annular groove, and a gap is formed between the set position and the groove wall, close to the second end, of the annular groove. When the check ring abuts against the set position of the groove bottom, the distance between the surface, close to the first end, of the check ring and the groove wall, close to the first end, of the annular groove is small, the inclination degree of the check ring can be reduced as much as possible under the condition that assembling is not affected, and when the movable iron core and the static iron core are separated, the check ring falls back along with the push rod till the check ring makes contact with the movable contact spring. As the inclination degree of the check ring is small, the stress generated when the check ring is in contact with the movable contact spring can be reduced, and the risk of fatigue fracture of the check ring is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic control devices, and in particular to a driving structure and a relay. Background Art

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] In the related art, a retaining ring is provided above the push rod of the high-voltage DC relay. The retaining ring usually has an opening, the opening is lighter, and the other parts are heavier. Of course, for the retaining ring without an opening, there will also be uneven mass. During the overtravel process, the heavy part will tilt downward due to the imbalance of its own gravity. During the power-off process, the push rod moves downward with the moving iron core, and the downward tilted part of the retaining ring will first contact the moving spring sheet, and the force is concentrated here. During multiple opening and closing processes, the retaining ring is prone to fatigue fracture. Summary of the invention

[0004] The embodiments of the present invention provide a driving structure and a relay to reduce the risk of fatigue fracture of a retaining ring.

[0005] The pushing structure provided by the embodiment of the present invention comprises a pushing rod, wherein the pushing rod has a first end and a second end, and an annular groove is provided on the circumferential surface of the pushing rod for mounting a retaining ring; along the axial direction of the pushing rod, the vertical distance between the bottom of the annular groove and the axis of the pushing rod is not completely equal;

[0006] The retaining ring can abut against a set position of the groove bottom of the annular groove, wherein a gap exists between the set position and the groove wall of the annular groove close to the second end.

[0007] According to some embodiments of the present invention, a contour line of a longitudinal section of the groove bottom of the annular groove is a straight line segment or a curved line segment; wherein the longitudinal section is parallel to the axis of the push rod.

[0008] According to some embodiments of the present invention, the contour line of the longitudinal section of the bottom of the annular groove is a straight line segment, and the vertical distance between the bottom of the annular groove and the axis of the push rod gradually increases from the first end to the second end.

[0009] According to some embodiments of the present invention, the contour line of the longitudinal section of the groove bottom of the annular groove is a curved segment, the bending direction of the curved segment is away from the axis of the push rod, or the bending direction of the curved segment is toward the axis of the push rod.

[0010] According to some embodiments of the present invention, a vertical distance between a set position of the groove bottom of the annular groove and a groove wall of the annular groove close to the first end is equal to a thickness of the retaining ring.

[0011] According to some embodiments of the present invention, the annular groove is disposed close to the first end of the push rod.

[0012] According to some embodiments of the present invention, a distance between a surface of the retaining ring close to the first end and a groove wall of the annular groove close to the first end is zero.

[0013] According to some embodiments of the present invention, at the position where the retaining ring abuts against the groove bottom of the annular groove, the retaining ring is adapted to the contour shape of the groove bottom of the annular groove.

[0014] According to some embodiments of the present invention, the set position is located between a surface of the retaining ring close to the first end and a groove wall of the annular groove close to the second end.

[0015] The relay provided in an embodiment of the present invention includes a retaining ring and the pushing structure; the retaining ring is installed in the annular groove, and the retaining ring abuts against a set position of the bottom of the annular groove, wherein there is a gap between the set position and the groove wall of the annular groove close to the second end.

[0016] According to some embodiments of the present invention, the relay also includes a moving contact assembly, a stationary contact assembly, a moving iron core and a stationary iron core, the moving contact assembly is connected to the first end of the push rod, the moving iron core is connected to the second end of the push rod, and the moving iron core can be attracted or separated from the stationary iron core to make the moving contact assembly contact or disconnect with the stationary contact assembly.

[0017] According to some embodiments of the present invention, the moving contact assembly includes a moving reed and a moving contact arranged on the moving reed, and the static contact assembly includes a static contact lead-out end and a static contact arranged on the static contact lead-out end; the moving reed is slidably connected to the push rod at a position close to the first end, the push rod is equipped with a contact spring, the moving reed is located on a side of the contact spring close to the retaining ring, and the contact spring is used to make the moving contact in close contact with the static contact.

[0018] According to some embodiments of the present invention, the push rod sleeve is provided with a first insulating member and a second insulating member, the contact spring is located between the first insulating member and the second insulating member, and the movable spring is installed between the contact spring and the first insulating member.

[0019] According to some embodiments of the present invention, a gasket is provided on a side of the first insulating member away from the movable spring sheet, and surfaces of the gasket and the retaining ring close to each other can fit in or separate from each other.

[0020] According to some embodiments of the present invention, the retaining ring has an open groove, and a buffer space is provided at one end of the open groove away from the opening.

[0021] According to some embodiments of the present invention, the retaining ring includes two clamping arms and a connecting plate connected between the two clamping arms, the clamping arms include a bent arm section and a straight arm section that are integrally formed, the straight arm sections of the two clamping arms are connected by the connecting plate, and the space between the straight arm sections of the two clamping arms forms the buffer space; a clamping space is formed between the bent arm sections of the two clamping arms.

[0022] According to some embodiments of the present invention, the outer edge of the curved arm section is arc-shaped, and there is a smooth transition between the outer edge of the curved arm section and the outer edge of the straight arm section.

[0023] An embodiment of the above invention has at least the following advantages or beneficial effects:

[0024] The pushing structure provided by the embodiment of the present invention, when in use, installs the moving iron core of the relay on the second end of the pushing rod, and when the moving iron core and the static iron core of the relay are attracted, the pushing rod moves upward, and the retaining ring is separated from the moving spring piece. Since the vertical distance between the bottom of the annular groove and the axis of the pushing rod along the axial direction of the pushing rod is not completely equal, and at the same time, there is a gap between the set position of the bottom of the annular groove and the groove wall of the annular groove close to the second end, when the retaining ring abuts against the set position of the bottom of the annular groove, the distance between the surface of the retaining ring close to the first end and the groove wall of the annular groove close to the first end is small, so that the inclination of the retaining ring can be reduced as much as possible without affecting the assembly. Therefore, when the moving iron core is separated from the static iron core, the retaining ring falls back together with the pushing rod until the retaining ring contacts the moving spring piece. Since the inclination of the retaining ring is small, the stress when the retaining ring contacts the moving spring piece can be reduced, thereby reducing the risk of fatigue fracture of the retaining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 What is shown is a schematic diagram of the structure of the pushing structure provided by an embodiment of the present invention;

[0026] Figure 2 What is shown is a front view of a propulsion structure provided by an embodiment of the present invention;

[0027] Figure 3 It shows Figure 2 A partial enlarged view of point Ⅰ in the middle;

[0028] Figure 4Shown is a cross-sectional view of a pushing structure provided by an embodiment of the present invention;

[0029] Figure 5 It shows a schematic diagram of the structure of the push structure and the retaining ring provided by the embodiment of the present invention;

[0030] Figure 6 The figure shows a first structural schematic diagram of the matching between the retaining ring and the annular groove in the embodiment of the present invention;

[0031] Figure 7 The figure shows a second structural schematic diagram of the matching between the retaining ring and the annular groove in the embodiment of the present invention;

[0032] Figure 8 The third structural schematic diagram of the retaining ring and the annular groove in the embodiment of the present invention is shown;

[0033] Fig. 9 The fourth structural schematic diagram of the retaining ring and the annular groove in the embodiment of the present invention is shown;

[0034] Fig.10 What is shown is a schematic diagram of the structure of a retaining ring in an embodiment of the present invention;

[0035] Fig.11 Shown is a front view of a retaining ring in an embodiment of the present invention;

[0036] Fig.12 What is shown is a schematic diagram of the structure of a relay provided by an embodiment of the present invention in a closed state;

[0037] Fig.13 It is shown that Fig.12 A partial enlarged view of the middle II;

[0038] Fig.14 What is shown is a schematic diagram of the structure of a relay provided by an embodiment of the present invention in a disconnected state;

[0039] Fig.15 It is shown that Fig.14 A partial enlarged view of the middle part III;

[0040] Fig.16 The figure shows a schematic diagram of the structure of the relay provided by the embodiment of the present invention in the disconnected state (the first insulating member and the second insulating member are not shown);

[0041] Fig.17 It is shown that Fig.16 A partial enlarged view of the middle IV;

[0042] Fig.18 The figure shows a schematic diagram of the structure of the relay provided by the embodiment of the present invention in the disconnected state (the first insulating member and the second insulating member are not shown);

[0043] Fig.19 It is shown that Fig.18 A partial enlarged view of point V in the middle.

[0044] The following are the descriptions of the reference numerals:

[0045] 1-push rod; 11-first end; 12-second end; 13-annular groove; 131-groove bottom; 131a-contour line; 132-groove wall; 14-limiting protrusion; 141-first limiting surface; 142-second limiting surface; 2-retaining ring; 21-opening groove; 22-buffer space; 23-first clamping arm; 231-first curved arm section; 232-first straight arm section; 24-second clamping arm; 241-second curved arm section; 242 -second straight arm section; 25-connecting plate; 26-clamping space; 31-moving spring; 41-static contact lead-out terminal; 51-moving iron core; 52-static iron core; 61-first insulating member; 611-transverse portion; 612-vertical portion; 62-second insulating member; 621-installation slot; 622-accommodating slot; 71-ceramic cover; 72-frame; 73-yoke iron plate; 74-metal shell; 81-contact spring; 82-reset spring; 9-gasket. DETAILED DESCRIPTION

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0047] See also Figures 1 to 19 As shown, this embodiment provides a pushing structure, including a pushing rod 1, the pushing rod 1 having a first end 11 and a second end 12, and the circumferential surface of the pushing rod 1 is provided with an annular groove 13 for installing a retaining ring 2; along the axial direction of the pushing rod 1, the vertical distance between the groove bottom 131 of the annular groove 13 and the axis of the pushing rod 1 is not completely equal; the retaining ring 2 can abut against the set position of the groove bottom 131 of the annular groove 13, wherein there is a gap between the set position and the groove wall 132 of the annular groove 13 close to the second end 12.

[0048] The groove bottom of the annular groove 13 is opposite to the groove opening, and along the axial direction of the push rod 1, the surfaces on both sides of the groove bottom 131 are groove walls 132 of the annular groove 13. Exemplarily, the two groove walls of the annular groove 13 are parallel, and the width of the annular groove 13 is the vertical distance between the two groove walls. Of course, the two groove walls of the annular groove 13 may also be non-parallel.

[0049] In this embodiment, the set position is located between the surface of the retaining ring 2 close to the first end 11 and the groove wall of the annular groove 13 close to the second end 12 .

[0050] For example, see Figure 6 , Figure 8 and Fig. 9 As shown, the portion of the retaining ring 2 that contacts the set position is the corner formed between the inner ring surface of the retaining ring and the surface of the retaining ring close to the second end, that is, the inner ring edge of the retaining ring 2 close to the second end 12. At this time, the retaining ring and the bottom of the annular groove can be in line-surface contact.

[0051] See also Figure 7 As shown, the portion of the retaining ring 2 that contacts the set position is a portion of the inner ring surface of the retaining ring close to the second end. At this time, the retaining ring and the bottom of the annular groove may be in surface contact.

[0052] It should be understood that when the retaining ring 2 is an open retaining ring, it is a ring with an opening on the circumference, so the inner ring edge of the retaining ring 2 close to the second end 12 is a curved line segment rather than a closed ring.

[0053] In other embodiments, the set position may also be located within the surface of the retaining ring 2 close to the first end 11, as long as the inclination of the retaining ring can be reduced, thereby reducing the stress when the retaining ring contacts the movable spring. For example, the portion of the retaining ring 2 that contacts the set position is the corner formed between the inner annular surface of the retaining ring and the surface of the retaining ring close to the first end.

[0054] The pushing structure provided in this embodiment is used to install the moving iron core 51 of the relay on the second end 12 of the pushing rod 1. When the moving iron core 51 is attracted with the static iron core 52 of the relay, the pushing rod 1 moves upward, and the retaining ring 2 is separated from the moving spring 31. Since the vertical distance between the bottom 131 of the annular groove 13 and the axis of the pushing rod 1 is not completely equal along the axial direction of the pushing rod 1, and at the same time, there is a gap between the set position of the bottom of the annular groove and the groove wall of the annular groove close to the second end, when the retaining ring 2 and the groove of the annular groove 13 are When the set position of the bottom 131 is abutted, the distance between the surface of the retaining ring 2 close to the first end 11 and the groove wall of the annular groove 13 close to the first end 11 is small, so that the inclination of the retaining ring 2 can be reduced as much as possible without affecting the assembly. Therefore, when the moving iron core is separated from the static iron core, the retaining ring 2 falls back with the push rod 1 until the retaining ring contacts the moving spring leaf. Since the inclination of the retaining ring is small, the stress when the retaining ring contacts the moving spring leaf can be reduced, thereby reducing the risk of fatigue fracture of the retaining ring 2.

[0055] It should be understood that there is a gap between the set position of the bottom of the annular groove and the groove wall of the annular groove close to the second end, which means that the minimum distance between the set position of the bottom of the annular groove and the groove wall of the annular groove close to the second end is greater than 0, that is, when the retaining ring and the bottom of the annular groove are in line contact, the contacting part is a curve, and the set position is the position of the curve. At this time, the minimum distance between the curve and the groove wall of the annular groove close to the second end is greater than 0.

[0056] When the retaining ring is in surface contact with the bottom of the annular groove, the contacting portion is a curved surface, and the set position is the position of the curved surface. At this time, the minimum distance between the curved surface and the groove wall of the annular groove close to the second end is greater than 0.

[0057] In one embodiment, the distance between the surface of the retaining ring 2 near the first end 11 and the groove wall of the annular groove near the first end 11 is zero. That is, when the retaining ring 2 abuts against the set position of the groove bottom of the annular groove 13, the surface of the retaining ring 2 near the first end 11 abuts against the groove wall of the annular groove 13 near the first end 11, which can ensure that the retaining ring 2 is always in a horizontal state and will not tilt.

[0058] In other embodiments, when the distance between the surface of the retaining ring 2 near the first end 11 and the groove wall of the annular groove 13 near the first end 11 is greater than zero, the inner ring edge of the retaining ring 2 near the first end 11 may also abut against the groove bottom of the annular groove.

[0059] In one embodiment, the vertical distance between the set position of the groove bottom 131 of the annular groove 13 and the groove wall 132 of the annular groove 13 close to the first end 11 is equal to the thickness of the retaining ring 2 .

[0060] See also Figure 5 As shown, the retaining ring 2 is a plate-like structure of equal thickness, and the thickness of the retaining ring 2 is the vertical distance between the two parallel surfaces of the retaining ring 2. The vertical distance between the set position of the groove bottom 131 of the annular groove 13 and the groove wall 132 of the annular groove 13 close to the first end 11 is d1, and the thickness of the retaining ring 2 is d2, d1=d2, so that when the retaining ring 2 abuts against the set position of the groove bottom 131 of the annular groove 13, the surface of the retaining ring 2 close to the first end 11 can abut against the groove wall 132 of the annular groove 13 close to the first end 11, thereby ensuring that the retaining ring 2 is in a horizontal state.

[0061] Exemplarily, the surface of the retaining ring 2 close to the first end 11 is in contact with the groove wall 132 of the annular groove 13 close to the first end 11 .

[0062] In one embodiment, see Figure 1As shown, the annular groove 13 is arranged near the first end 11 of the push rod 1. This ensures that when the push rod 1 is applied to the relay, the retaining ring 2 can always be located above the movable spring piece 31, so as to contact or separate from the upper surface of the movable spring piece 31.

[0063] In one embodiment, at the position where the retaining ring abuts the bottom of the annular groove, the contours of the retaining ring and the bottom of the annular groove are adapted to each other, so that the portion of the retaining ring close to the second end can better fit the bottom of the annular groove.

[0064] In one possible design, see Figure 4 As shown, the contour line 131a of the longitudinal section of the groove bottom 131 of the annular groove 13 is a straight line segment; wherein the longitudinal section is parallel to the axis of the push rod 1. In this embodiment, the axis of the push rod 1 is defined as being parallel to the axis of the push rod 1 in the longitudinal section. Since the vertical distance between the groove bottom 131 of the annular groove 13 and the axis of the push rod 1 is not completely equal along the axial direction of the push rod 1, the straight line segment is set at an angle to the axis of the push rod 1.

[0065] In this possible design, see Figures 1 to 3 as well as Figure 6 As shown, along the direction from the first end 11 to the second end 12, the vertical distance between the groove bottom 131 of the annular groove 13 and the axis of the push rod 1 gradually increases.

[0066] Exemplarily, the portion of the push rod 1 corresponding to the annular groove 13 is a truncated cone-shaped structure, and the circumferential surface of the truncated cone-shaped structure is the groove bottom 131 of the annular groove 13. When the retaining ring 2 is installed in the annular groove 13, the retaining ring 2 will slide along the circumferential surface of the truncated cone-shaped structure toward the first end 11 until the surface of the retaining ring 2 close to the first end 11 of the push rod 1 abuts against the groove wall 132 of the annular groove 13 close to the first end 11 of the push rod 1, ensuring that the retaining ring 2 can always be in a horizontal state.

[0067] In another possible design, the contour line 131 a of the longitudinal section of the groove bottom 131 of the annular groove 13 is a curved section; wherein the longitudinal section is parallel to the axis of the push rod 1 .

[0068] In this other possible design, see Figure 7 As shown, the bending direction of the curved section is away from the axis of the push rod 1 .

[0069] Exemplarily, the portion of the push rod 1 corresponding to the annular groove 13 includes a truncated cone-shaped structure and a protrusion integrally formed and arranged on the circumferential surface of the truncated cone-shaped structure, and the outer surface of the protrusion is the groove bottom 131 of the annular groove 13. The vertical distance between the set position of the protrusion and the axis of the push rod 1 is d3, and the vertical distance between the portion of the protrusion located between the set position and the lower bottom surface of the truncated cone-shaped structure and the axis of the push rod 1 is d4, d3<d4, wherein the set position of the outer surface of the protrusion is the set position of the groove bottom 131 of the annular groove 13. In this way, it can be ensured that the retaining ring 2 is limited above the set position, thereby ensuring that the surface of the retaining ring 2 close to the first end 11 of the push rod 1 is in contact with the groove wall 132 of the annular groove 13 close to the first end 11 of the push rod 1, thereby ensuring that the retaining ring 2 is always in a horizontal state and will not tilt.

[0070] It should be noted that the value of d4 is variable, that is, within the range between the set position and the lower bottom surface of the truncated cone structure, the vertical distance between the protrusion and the axis of the push rod 1 is variable. Usually, it is sufficient to ensure that the vertical distance between the part of the protrusion closest to the set position and the axis of the push rod 1 is greater than d3.

[0071] Of course, see Figure 8 As shown, the bending direction of the curved segment can also be toward the axis of the push rod 1, as long as it can be ensured that when the inner ring edge of the retaining ring 2 close to the second end 12 abuts against the set position of the groove bottom 131 of the annular groove 13, the surface of the retaining ring 2 close to the first end 11 of the push rod 1 abuts against the groove wall 132 of the annular groove 13 close to the first end 11 of the push rod 1, thereby ensuring that the retaining ring 2 is always in a horizontal state.

[0072] See also Fig. 9 As shown, the curved line segment may also include two oblique line segments and an arc segment connected between the two oblique line segments.

[0073] This embodiment also provides a relay, including a retaining ring 2 and a pushing structure provided in this embodiment; the retaining ring 2 is installed in the annular groove 13, and the retaining ring 2 abuts against a set position of the groove bottom 131 of the annular groove 13, wherein there is a gap between the set position and the groove wall 132 of the annular groove 13 close to the second end 12.

[0074] In this embodiment, the relay also includes a moving contact assembly, a static contact assembly, a moving iron core 51 and a static iron core 52. The moving contact assembly is connected to the first end 11 of the push rod 1, and the moving iron core 51 is connected to the second end 12 of the push rod 1. The moving iron core 51 can be attracted or separated from the static iron core 52 to make the moving contact assembly contact or disconnect with the static contact assembly.

[0075] In the relay provided in this embodiment, when the moving iron core 51 and the static iron core 52 of the relay are attracted, the push rod 1 moves upward and the retaining ring 2 is separated from the moving contact assembly. Since the vertical distance between the bottom 131 of the annular groove 13 and the axis of the push rod 1 is not completely equal along the axial direction of the push rod 1, and at the same time, there is a gap between the set position of the bottom of the annular groove and the groove wall of the annular groove close to the second end, when the retaining ring 2 abuts against the set position of the bottom 131 of the annular groove 13, the distance between the surface of the retaining ring 2 close to the first end 11 and the groove wall of the annular groove 13 close to the first end 11 is small, so that the inclination of the retaining ring can be reduced as much as possible without affecting the assembly. Therefore, when the moving iron core 51 and the static iron core 52 are separated, the retaining ring 2 falls back together with the push rod 1 until the retaining ring 2 contacts the moving contact assembly. Since the inclination of the retaining ring is small, the stress when the retaining ring contacts the moving spring sheet can be reduced, thereby reducing the risk of fatigue fracture of the retaining ring 2.

[0076] In one embodiment, see Fig.12 and Fig.14 As shown, the moving contact assembly includes a moving reed 31 and a moving contact disposed on the moving reed 31, and the stationary contact assembly includes a stationary contact lead-out terminal 41 and a stationary contact disposed on the stationary contact lead-out terminal 41. When the moving iron core 51 and the stationary iron core 52 of the relay are attracted, the moving contact contacts the stationary contact, and when the moving iron core 51 and the stationary iron core 52 of the relay are separated, the moving contact separates from the stationary contact.

[0077] In this embodiment, the retaining ring 2 is a plate-like structure of equal thickness, and the plate surface of the retaining ring 2 is perpendicular to the axis of the push rod 1. This ensures that the retaining ring 2 fits the movable spring 31, and the force-bearing area is large, thereby reducing the risk of fatigue fracture of the retaining ring 2.

[0078] In one embodiment, see Fig.10 As shown, the retaining ring 2 has an opening groove 21, and a buffer space 22 is provided at one end of the opening groove 21 away from the opening. By providing the buffer space 22, the elasticity is improved, the retaining ring 2 is conveniently installed in the annular groove 13, and the risk of stress cracking at the root of the retaining ring 2 is reduced.

[0079] In one embodiment, see Fig.11 As shown, the retaining ring 2 includes two clamping arms and a connecting plate 25 connected between the two clamping arms. The clamping arms include a bent arm section and a straight arm section that are integrally formed. The straight arm sections of the two clamping arms are connected by the connecting plate 25. The space between the straight arm sections of the two clamping arms forms a buffer space 22; a clamping space 26 is formed between the bent arm sections of the two clamping arms.

[0080] Exemplarily, the two clamping arms are named as the first clamping arm 23 and the second clamping arm 24, respectively. The first clamping arm 23 includes a first bent arm segment 231 and a first straight arm segment 232 that are integrally formed, and the second clamping arm 24 includes a second bent arm segment 241 and a second straight arm segment 242 that are integrally formed. The first straight arm segment 232, the second straight arm segment 242 and the connecting plate 25 are integrally formed, and the space between the first straight arm segment 232 and the second straight arm segment 242 forms a buffer space 22, which is connected to the opening groove 21.

[0081] A clamping space 26 is formed between the first arm section 231 and the second arm section 241. For example, an arcuate depression is provided on the side where the first arm section 231 and the second arm section 241 are close to each other, and the space between the two arcuate depressions is the clamping space 26. The lower edge of the arcuate depression abuts against the set position of the groove bottom 131 of the annular groove 13, and the surface of the retaining ring 2 close to the first end 11 of the push rod 1 abuts against and fits with the groove wall 132 of the annular groove 13 close to the first end 11 of the push rod 1, thereby ensuring that the retaining ring 2 is always in a horizontal state and does not tilt.

[0082] In one embodiment, the outer edge of the curved arm section is arc-shaped, and there is a smooth transition between the outer edge of the curved arm section and the outer edge of the straight arm section.

[0083] Exemplarily, the outer edge of the bend arm segment is in an arc shape protruding outward, that is, the outer edge of the first bend arm segment 231 protrudes in a direction away from the second bend arm segment 241, and the outer edge of the second bend arm segment 241 protrudes in a direction away from the first bend arm segment 231, thereby lengthening the force arm of the first clamping arm 23 and the second clamping arm 24. Combined with the buffer space 22, the elasticity of the retaining ring 2 can be improved, which facilitates the installation of the retaining ring 2 in the annular groove 13 and reduces the risk of stress cracking at the root of the retaining ring.

[0084] In this embodiment, there is a smooth transition between the outer edge of the curved arm section and the outer edge of the straight arm section, which can effectively reduce the risk of the clamping arm breaking at the position where the curved arm section and the straight arm section are connected.

[0085] In one embodiment, the contour line of the longitudinal section of the inner ring surface of the retaining ring 2 is perpendicular to the plate surface of the retaining ring 2 , and the contour line is a straight line segment.

[0086] In other embodiments, the contour line of the longitudinal section of the inner ring surface of the retaining ring 2 is arranged at an inclined angle with the plate surface of the retaining ring 2, and the contour line is an oblique line segment.

[0087] In this embodiment, the movable spring 31 is slidably connected to the push rod 1 at a position close to the first end 11. The push rod 1 is equipped with a contact spring 81. The movable spring 31 is located on the side of the contact spring 81 close to the retaining ring. The contact spring 81 is used to make the movable contact in close contact with the static contact.

[0088] In one embodiment, see Figures 16 to 19 As shown, the relay also includes a ceramic cover 71, a frame piece 72, a yoke plate 73 and a metal shell 74. The yoke plate 73 is sealed and connected to the bottom end of the ceramic cover 71 through the frame piece 72 to enclose a first vacuum chamber; the metal shell 74 is connected to the bottom end of the yoke plate 73 to form a second vacuum chamber. The yoke plate 73 is provided with a through hole for connecting the first vacuum chamber and the second vacuum chamber, and the upper end of the static iron core 52 is fixedly connected to the hole wall of the through hole.

[0089] The static contact lead-out terminal 41 is installed on the ceramic cover 71, the static contact, the moving contact assembly, and the first end 11 of the push rod 1 are all located in the first vacuum chamber, and the second end 12 of the push rod 1, the moving iron core 51, and the portion of the static iron core 52 located outside the through hole are all located in the second vacuum chamber.

[0090] In one embodiment, see Fig.13 As shown, the push rod 1 is sleeved with a first insulating member 61 and a second insulating member 62, the contact spring 81 is located between the first insulating member 61 and the second insulating member 62, and the movable spring piece 31 is installed between the contact spring 81 and the first insulating member 61. During the multiple separation and attraction processes of the movable iron core 51 and the static iron core 52, the retaining ring 2 can indirectly contact the movable spring piece 31 through the first insulating member 61.

[0091] For example, see Figure 1 , Figure 2 and Fig.13 As shown, a limiting protrusion 14 is provided at a position between the two ends of the push rod 1, and the limiting protrusion 14 has a first limiting surface 141 and a second limiting surface 142 relative to each other, the first limiting surface 141 is close to the first end 11 of the push rod 1, and the second limiting surface 142 is far away from the first end 11 of the push rod 1; the lower end surface of the second insulating member 62 contacts the first limiting surface 141, and exemplarily, the lower end surface of the second insulating member 62 is indirectly in contact with the first limiting surface 141 through a gasket, and in the power-off state, the moving iron core 51 is separated from the static iron core 52, and the lower end surface of the second insulating member 62 can contact the yoke iron plate 73.

[0092] See also Fig.13 and Fig.15 As shown, the second insulating member 62 is provided with a mounting groove 621 , and the contact spring 81 is installed in the mounting groove 621 .

[0093] See also Fig.13 and Fig.15As shown, the second insulating member 62 is also provided with a receiving groove 622, and the first insulating member 61 includes a transverse portion 611 and a vertical portion 612. The transverse portion 611 and the vertical portion 612 are integrally formed, and the width of the transverse portion 611 is greater than the width of the vertical portion 612. The vertical portion 612 passes through the through hole in the middle of the movable spring piece 31 and can slide in the receiving groove 622, ensuring that the first insulating member and the second insulating member can always cover the push rod 1, so that the push rod 1 is completely isolated from the movable spring piece 31.

[0094] The transverse portion 611 is located above the moving reed 31. When the push rod 1 moves upward, the contact spring 81 changes from a compressed state to a released state, pushing the moving reed 31 to move upward, generating an overtravel, and providing pressure for the contact between the moving contact and the static contact, so that the moving contact and the static contact are in close contact.

[0095] Exemplarily, the first insulating member 61 and the second insulating member 62 may be ceramic insulators.

[0096] In one embodiment, see Fig.15 As shown, a gasket 9 is provided on one side of the first insulating member 61 away from the movable spring 31 , and the gasket 9 and the surfaces of the retaining ring 2 close to each other can fit in or separate from each other.

[0097] By providing the gasket 9, during the multiple separation and attraction processes of the moving iron core 51 and the static iron core 52, the retaining ring 2 can indirectly contact the first insulating member 61 and the moving spring 31 through the gasket 9 to prevent the first insulating member 61 from being worn. At the same time, by changing the thickness of the gasket, the stroke can be adjusted to be suitable for different relays.

[0098] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present invention can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0099] In the embodiments of the invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the invention can be understood according to the specific circumstances.

[0100] In the description of the embodiments of the invention, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the embodiments of the invention.

[0101] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the invention embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0102] The above are only preferred embodiments of the invention embodiments, and are not intended to limit the invention embodiments. For those skilled in the art, the invention embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the invention embodiments shall be included in the protection scope of the invention embodiments.

Claims

1. A propulsion structure, characterized in that: The push rod comprises a first end and a second end, and a peripheral surface of the push rod is provided with an annular groove for mounting a retaining ring; along the axial direction of the push rod, a vertical distance between the bottom of the annular groove and the axis of the push rod is not completely equal; The retaining ring can abut against a set position of the groove bottom of the annular groove, wherein a gap exists between the set position and the groove wall of the annular groove close to the second end.

2. The propulsion structure according to claim 1, characterized in that: The contour line of the longitudinal section of the groove bottom of the annular groove is a straight line segment or a curved line segment; wherein the longitudinal section is parallel to the axis of the push rod.

3. The propulsion structure according to claim 2, characterized in that: The contour line of the longitudinal section of the bottom of the annular groove is a straight line segment, and the vertical distance between the bottom of the annular groove and the axis of the push rod gradually increases from the first end to the second end.

4. The propulsion structure according to claim 2, characterized in that: The contour line of the longitudinal section of the groove bottom of the annular groove is a curved segment, and the bending direction of the curved segment is away from the axis of the push rod, or the bending direction of the curved segment is toward the axis of the push rod.

5. The propulsion structure according to any one of claims 1 to 4, characterized in that: The vertical distance between the set position of the groove bottom of the annular groove and the groove wall of the annular groove close to the first end is equal to the thickness of the retaining ring.

6. The propulsion structure according to any one of claims 1 to 4, characterized in that: The annular groove is disposed close to the first end of the push rod.

7. The propulsion structure according to any one of claims 1 to 4, characterized in that: The distance between the surface of the retaining ring close to the first end and the groove wall of the annular groove close to the first end is zero.

8. The propulsion structure according to any one of claims 1 to 4, characterized in that: At the position where the retaining ring abuts against the groove bottom of the annular groove, the retaining ring is adapted to the contour shape of the groove bottom of the annular groove.

9. The propulsion structure according to any one of claims 1 to 4, characterized in that: The set position is located between the surface of the retaining ring close to the first end and the groove wall of the annular groove close to the second end.

10. A relay, characterized in that: It comprises a retaining ring and a pushing structure as described in any one of claims 1 to 9; the retaining ring is installed in the annular groove, and the retaining ring abuts against a set position of the groove bottom of the annular groove, wherein there is a gap between the set position and the groove wall of the annular groove close to the second end.

11. The relay according to claim 10, characterized in that: It also includes a moving contact assembly, a stationary contact assembly, a moving iron core and a stationary iron core. The moving contact assembly is connected to the first end of the push rod, and the moving iron core is connected to the second end of the push rod. The moving iron core can be attracted or separated from the stationary iron core to make the moving contact assembly contact or disconnect with the stationary contact assembly.

12. The relay according to claim 11, characterized in that: The moving contact assembly includes a moving reed and a moving contact arranged on the moving reed, and the static contact assembly includes a static contact lead-out end and a static contact arranged on the static contact lead-out end; the moving reed is slidably connected to a position of the push rod near the first end, the push rod is equipped with a contact spring, the moving reed is located on a side of the contact spring near the retaining ring, and the contact spring is used to make the moving contact in close contact with the static contact.

13. The relay according to claim 12, characterized in that: The push rod sleeve is provided with a first insulating member and a second insulating member, the contact spring is located between the first insulating member and the second insulating member, and the movable spring sheet is installed between the contact spring and the first insulating member.

14. The relay according to claim 13, characterized in that: A gasket is provided on one side of the first insulating member away from the movable spring sheet, and surfaces of the gasket and the retaining ring close to each other can be fitted or separated.

15. The relay according to any one of claims 10 to 14, characterized in that: The retaining ring has an open groove, and a buffer space is arranged at one end of the open groove away from the opening.

16. The relay according to claim 15, characterized in that The retaining ring includes two clamping arms and a connecting plate connected between the two clamping arms. The clamping arms include a bent arm section and a straight arm section that are integrally formed. The straight arm sections of the two clamping arms are connected by the connecting plate. The space between the straight arm sections of the two clamping arms forms the buffer space. A clamping space is formed between the bent arm sections of the two clamping arms.

17. The relay according to claim 16, characterized in that: The outer edge of the curved arm section is arc-shaped, and there is a smooth transition between the outer edge of the curved arm section and the outer edge of the straight arm section.

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