Energy storage mechanism for power conversion switch

Abstract

The present invention discloses an energy storage mechanism applied to a power conversion switch, comprising an operating shaft and an L-shaped base formed by connecting a vertical part and a horizontal part, wherein the horizontal part extends upward with at least two parallel support plates, and the operating shaft is fixedly connected with a crank arm; an upper through hole is provided on the upper part of a pressure rod, and a lower through hole is provided on the lower part, wherein the upper through hole is a circular hole, and the lower through hole is a long strip through hole distributed along the length direction of the pressure rod, an upper connecting hole is provided on one end of the crank arm, and a lower connecting hole is provided on each support plate, an upper connecting pin passes through the upper connecting hole and the upper through hole so that the upper part of the pressure rod is hinged with the crank arm, a lower connecting pin passes through the lower connecting hole and the lower through hole so that the lower part of the pressure rod is between the two support plates, a compression spring is sleeved on the middle part of the pressure rod, and a shoulder is provided on the upper part of the pressure rod, and the shoulder presses the upper end of the compression spring, and the lower end of the compression spring rests on the upper end surfaces of the two support plates. The present invention can effectively improve the reliability of work and facilitate modular design and installation.

Description

Technical Field

[0001] The invention relates to the technical field of power conversion switch manufacturing, in particular to an energy storage mechanism applied to a power conversion switch. Background Art

[0002] In the structure of the power transfer switch, the energy storage mechanism is a necessary mechanism. This energy storage mechanism enables the contact mechanism of the power transfer switch to quickly open and close by storing energy first and then releasing energy. This improves the response speed of the power transfer switch and the reliability of power switching. Existing energy storage mechanisms usually have a compression spring to store and release energy. Whether the compression spring can reliably expand and retract and the accuracy of reset will affect the reliability of the energy storage mechanism.

[0003] On February 2, 2018, an invention patent with patent number ZL201720667266.6 and titled “An energy storage device for an automatic transfer switch” was disclosed. The device comprises a main shaft (1), a first compression spring energy storage mechanism (2) and a second compression spring energy storage mechanism (3) respectively sleeved on both ends of the main shaft (1), and a transmission assembly arranged on the main shaft (1) and connected to the main shaft (1) in a transmission manner. The first compression spring energy storage mechanism (2) and the second compression spring energy storage mechanism (3) each comprise a pair of support plates (4) sleeved in parallel on the main shaft (1), a turntable control assembly sleeved on the main shaft (1) and rotatably arranged between the two support plates (4), and a pair of compression spring push rod assemblies arranged in parallel between the two support plates (4) and respectively located on both sides of the turntable control assembly. The compression spring push rod assembly is connected to the main shaft (1) in a transmission manner through the turntable control assembly.

[0004] The compression spring push rod assembly comprises a push rod guide shaft (9) arranged between two support plates (4), a push rod (10) sleeved on the push rod guide shaft (9), and a compression spring (11) sleeved on the push rod (10); one end of the push rod (10) is transmission-connected to the second turntable (6) via the second turntable support shaft (8).

[0005] The push rod (10) is provided with a compression spring limiting portion (1002), and the two ends of the compression spring (11) are in contact with the push rod guide shaft (9) and the compression spring limiting portion (1002) respectively.

[0006] The push rod (10) is provided with a push rod sliding groove (1001) adapted to the push rod guide shaft (9) along the length direction of the push rod (10).

[0007] The energy storage device can accelerate the opening and closing speed of the automatic transfer switch through the cooperation of the turntable control component and the compression spring push rod component, improve the working performance of the product, have stable quality, and the versatility of the various components in the device is good, which reduces the processing difficulty, assembly difficulty and production cost of the product, improves production efficiency, and is easy to achieve mass production. However, this energy storage device still has the following problems: first, one end of the compression spring (11) directly contacts the push rod guide shaft (9). Due to the small contact surface, the compression spring (11) is easy to move and shift along its radial direction, which will affect the performance of the compression spring (11). Second, the push rod (10) is also easy to shift relative to the axial direction of the push rod guide shaft (9), which will also affect the performance of the entire energy storage mechanism. Third, the entire energy storage component needs to be installed between the two support plates (4), and the installation difficulty is still relatively large. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide an energy storage mechanism applied to a power conversion switch, which can effectively improve the working reliability and facilitate modular design and installation.

[0009] To achieve the above-mentioned purpose, the technical solution of the present invention is: an energy storage mechanism applied to a power conversion switch, comprising an operating shaft for driving the power conversion switch contact mechanism to open and close, and an L-shaped base formed by connecting a vertical portion and a horizontal portion, the L-shaped base is fixedly connected to the base of the power conversion switch through its horizontal portion, the horizontal portion extends upward with at least two parallel support plates, the operating shaft passes through the vertical portion and is parallel to the horizontal portion, each of the support plates is parallel to the vertical portion, and the operating shaft is fixedly connected to a crank arm; an upper through hole is provided on the upper portion of a pressure rod , a lower through hole is provided at the lower part, the upper through hole is a circular hole, and the lower through hole is a long strip through hole distributed along the length direction of the pressure rod, an upper connecting hole is provided at one end of the crank arm, and a lower connecting hole is provided on each support plate. An upper connecting pin passes through the upper connecting hole and the upper through hole so that the upper part of the pressure rod is hinged with the crank arm, and a lower connecting pin passes through the lower connecting hole and the lower through hole so that the lower part of the pressure rod is located between the two support plates. A compression spring is sleeved on the middle part of the pressure rod, and a shoulder is provided on the upper part of the pressure rod, which presses the upper end of the compression spring, and the lower end of the compression spring rests on the upper end surfaces of the two support plates.

[0010] As a further improvement, a positioning protrusion extends upward from the middle position of the upper end of each support plate, and two positioning protrusions are inserted into the inner hole of the compression spring to prevent the lower end of the compression spring from moving radially. This can further improve the expansion and contraction performance and reset accuracy of the compression spring, and further improve the reliability of the energy storage mechanism.

[0011] As a further improvement, a notch is provided in the middle of the lower end of each support plate to facilitate forming, and a reinforcing convex portion is provided at the connection between the lower end of each support plate and the transverse portion on both sides. This not only facilitates the stamping and bending forming of the support plate, but also improves the supporting strength of the support plate.

[0012] As a further improvement, the compression rod is formed by stamping a metal plate and is T-shaped, and the two support plates are provided with limiting protrusions on the opposite sides, and the two limiting protrusions limit the movement of the lower part of the compression rod along the thickness direction. By preventing the movement of the compression rod, the normal performance of the compression spring can also be ensured.

[0013] As a further improvement, a micro switch mounting seat is fixedly connected to the vertical part, and a micro switch is mounted on the micro switch mounting seat. The working state of the power conversion switch is determined by the controller by whether the crank arm touches the spring of the micro switch. This can not only better indicate the working state of the power conversion switch, but also facilitate the positioning of the micro switch and realize modular installation through the micro switch mounting seat.

[0014] Preferably, the mounting seat comprises two parallel side portions and a connecting portion connecting the two side portions, at least two elastic arms are provided on the two side portions, one end of each elastic arm is connected to one side portion, and the other end is provided with a positioning convex portion, and the elastic arms on different side portions are positioned in pairs corresponding to each other to form a plurality of pairs of elastic arms, and the two positioning convex portions on each pair of elastic arms are positioned facing each other, and when the micro switch is installed between the two side portions, the positioning convex portion on each elastic arm is inserted into the mounting through hole of the micro switch housing;

[0015] The mounting seat is attached to the vertical portion of the L-shaped base through a side portion, the vertical portion is provided with at least two positioning holes, and the side portion attached to the vertical portion is provided with at least two positioning columns, each positioning column is matched with one of the positioning holes. The mounting seat is convenient for installing the micro switch and can improve the accuracy of positioning the micro switch.

[0016] Furthermore, each of the positioning protrusions is provided with a guiding inclined surface, and when the micro switch is installed between the two side portions, the housing of the micro switch drives the elastic arm to deform and shift through the guiding inclined surface.

[0017] Preferably, each of the positioning protrusions is cylindrical, and the guiding slope is arranged on the end surface of the positioning protrusion.

[0018] Preferably, the side portions are in a "<" shape, with two elastic arms being provided at one end of each side portion and one elastic arm being provided at the other end.

[0019] Furthermore, a fixing through hole is provided on the other end of each side portion, and the positions of the two fixing through holes correspond to each other;

[0020] A first micro switch is installed between one end of the two side parts, and each mounting through hole on the housing of the first micro switch is snapped into position by two positioning protrusions;

[0021] A second micro switch is installed between the other ends of the two side portions, a mounting through hole on the housing of the second micro switch is snapped into position by the two positioning protrusions, and a fixing screw passes through the fixing through hole on the other end of each side portion and also passes through another mounting through hole on the housing of the second micro switch to position the second micro switch;

[0022] The fixing screw is also locked on the vertical part, and the crank arm cooperates with the first micro switch and the second micro switch respectively and determines the working state of the conversion switch through the controller. Such a mounting base can conveniently install two micro switches to further realize modular design and installation, and improve the maintenance performance of the power conversion switch.

[0023] The present invention extends two parallel support plates upward through the horizontal part of the L-shaped base, each support plate is provided with a lower connecting hole, and the operating shaft is fixedly connected to a crank arm; an upper through hole is provided on the upper part of a pressure rod, and a lower through hole is provided on the lower part, the upper through hole is a circular hole, and the lower through hole is an elongated through hole distributed along the length direction of the pressure rod, one end of the crank arm is provided with an upper connecting hole, an upper connecting pin passes through the upper connecting hole and the upper through hole so that the upper part of the pressure rod is hinged with the crank arm, a lower connecting pin passes through the lower connecting hole and the lower through hole so that the lower part of the pressure rod is located between the two support plates, a compression spring is sleeved on the middle part of the pressure rod, and a shoulder is provided on the upper part of the pressure rod, the shoulder presses the upper end of the compression spring, and the lower end of the compression spring rests on the upper end surfaces of the two support plates. In this way, the lower end of the compression spring rests on the upper end surfaces of the two support plates, and the lower end of the compression spring has four support positions. The expansion and contraction performance of the compression spring will not be restricted, and the performance is more reliable. At the same time, the lower part of the pressure rod is between the two support plates, the movement of the lower part of the pressure rod is restricted, and the lower end of the compression spring is not easy to move, which can also ensure the performance of the compression spring. Therefore, the present invention can effectively improve the reliability of work.

[0024] On the other hand, all components of the present invention are installed on the L-shaped base, which is convenient for modular design and installation, and the L-shaped base forms an open installation space, which is also convenient for the installation of various components. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a stereogram of the present invention;

[0026] Figure 2 It is the front view of the present invention;

[0027] Figure 3 is a stereoscopic diagram of the present invention installed on the base of a power conversion switch;

[0028] Figure 4 It is a three-dimensional diagram of an L-shaped base;

[0029] Figure 5 yes Figure 4 A-direction view;

[0030] Figure 6 It is the front view of the compression rod;

[0031] Figure 7 This is a stereogram of the micro switch mounting base;

[0032] Figure 8 The present invention is a stereoscopic diagram of a micro switch mounting base equipped with a first micro switch and a second micro switch. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Figures 1 to 8 As shown, an energy storage mechanism applied to a power conversion switch includes an operating shaft 1 for driving the power conversion switch contact mechanism to open and close, an L-shaped base 2 formed by connecting a vertical portion 21 and a horizontal portion 22, the L-shaped base 2 is fixedly connected to the base 3 of the power conversion switch through its horizontal portion 22, the operating shaft 1 passes through the vertical portion 21 and is parallel to the horizontal portion 22, the operating shaft 1 is fixedly connected to a crank arm 4, the crank arm 4 is cam-shaped, and the lower ends of two parallel support plates 23 are fixedly connected to the base 3 of the power conversion switch through the horizontal portion 22, each of the support plates 23 is extended upward by the horizontal portion 22, and each of the support plates 23 is parallel to the vertical portion 21. In this embodiment, the horizontal portion 22 has four support plates 23 extending upward, and the four support plates 23 form a pair of two.

[0035] A positioning protrusion 231 extends upward from the middle position of the upper end of each support plate 23. An upper through hole 51 is provided on the upper part of a pressure rod 5, and a lower through hole 52 is provided on the lower part. The upper through hole 51 is a round hole, and the lower through hole 52 is a long strip through hole distributed along the length direction of the pressure rod 5. An upper connecting hole 41 is provided at one end of the crank arm 4. Each support plate 23 is provided with a lower connecting hole 232. An upper connecting pin 42 passes through the upper connecting hole 41 and the upper through hole 51 so that the pressure rod 5 The upper part is hinged with the crank arm 4, and a lower connecting pin 43 passes through the lower connecting hole 232 and the lower through hole 52 so that the lower part of the pressure rod 5 is between the two support plates 23. The middle part of the pressure rod 5 is sleeved with a compression spring 6, and the upper part of the pressure rod 5 is provided with a shoulder 53. The shoulder 53 presses the upper end of the compression spring 6, and the lower end of the compression spring 6 rests on the upper end surfaces of the two support plates 23. Two positioning protrusions 231 are inserted into the inner hole of the compression spring 6 to prevent the lower end of the compression spring 6 from moving radially.

[0036] A notch 233 is provided in the middle of the lower end of each support plate 23 for easy forming, and reinforcing protrusions 234 are provided at the connection between the two sides of the lower end of each support plate 23 and the cross portion 22. This not only makes the support plate 23 easy to bend and form, but also makes the support strength of the support plate 23 better, so as to improve the reliability of the energy storage mechanism.

[0037] The pressure rod 5 is formed by stamping a metal plate and is T-shaped. The two support plates 23 are provided with limiting protrusions 235 on the opposite sides. The two limiting protrusions 235 limit the movement of the lower part of the pressure rod 5 along the thickness direction thereof, so as to improve the displacement accuracy of the pressure rod 5.

[0038] The vertical portion 21 is fixedly connected with a micro switch mounting seat 7, on which a micro switch is mounted. The micro switch is switched from a normally open state to a normally closed state, or from a normally closed state to a normally open state, by whether the crank arm 4 touches the spring of the micro switch. The state of the micro switch is then detected by a controller to determine the working state of the power transfer switch, which can be displayed on the mask.

[0039] The mounting seat 7 includes two parallel side portions 71 and a connecting portion 72 connecting the two side portions 71. The front sides and the lower sides of the two side portions 71 are connected and fixed together by a connecting portion 72. The side portions 71 are in a "〈" shape. Each side portion 71 is provided with two elastic arms 73 at one end and one elastic arm 73 at the other end.

[0040] One end of each elastic arm 73 is connected to a side portion 71, and the other end is provided with a positioning protrusion 731. The elastic arms 73 on different side portions 71 are located in pairs corresponding to each other to form a plurality of pairs of elastic arms 73. The two positioning protrusions 731 on each pair of elastic arms 73 are located facing each other. When the micro switch is installed between the two side portions 71, the positioning protrusion 731 on each elastic arm 73 is inserted into the mounting through hole of the micro switch housing.

[0041] The mounting seat 7 is attached to the vertical portion 21 of the L-shaped base 2 through a side portion 71. The vertical portion 21 is provided with four positioning holes 211. Each side portion 71 is provided with two positioning columns 74. When the side portion 71 is attached to the vertical portion 21, each positioning column 74 cooperates with one of the positioning holes 211.

[0042] Each of the positioning protrusions 731 is provided with a guiding inclined surface 732 . When the micro switch is installed between the two side portions 71 , the housing of the micro switch drives the elastic arm 73 to deform and shift through the guiding inclined surface 732 .

[0043] Each of the positioning protrusions 731 is cylindrical, and the guiding inclined surface 732 is disposed on the end surface of the positioning protrusion 731 .

[0044] A fixing through hole 75 is also provided on the other end of each side portion 71, and the positions of the two fixing through holes 75 correspond to each other; a first micro switch 8 is installed between one ends of the two side portions 71, and each mounting through hole on the housing of the first micro switch 8 is snapped into position by the two positioning protrusions 731;

[0045] A second micro switch 9 is installed between the other ends of the two side portions 71, and a mounting through hole on the housing of the second micro switch 9 is snapped into position by the two positioning protrusions 731. A fixing screw 10 passes through the fixing through hole 75 on the other end of each side portion 71 and also passes through another mounting through hole on the housing of the second micro switch 9 to position the second micro switch 9.

[0046] The fixing screw is also locked on the vertical portion 21, and the crank arm 4 cooperates with the first micro switch 8 and the second micro switch 9 respectively and determines the working state of the conversion switch through the controller.

[0047] When this embodiment is working, when the operating shaft 1 rotates in one direction, the operating shaft 1 drives the crank arm 4 to rotate. The crank arm 4 compresses the compression spring 6 through the pressure rod 5 to store energy in the energy storage mechanism. When the energy storage mechanism releases energy, it drives the operating shaft 1 to rotate quickly in the other direction to reset.

[0048] The above is only a preferred embodiment of the present invention. Any equivalent changes made by those skilled in the art according to the claims shall fall within the protection scope of this case.

Claims

1. An energy storage mechanism applied to a power conversion switch, comprising an operating shaft for driving the contact mechanism of the power conversion switch to open and close, characterized in that: The utility model also comprises an L-shaped base formed by connecting a vertical part and a horizontal part, and the L-shaped base is fixedly connected with the base of the power conversion switch through its horizontal part, and the horizontal part extends upwardly and has at least two parallel support plates, and the operating shaft passes through the vertical part and is parallel to the horizontal part, and each of the support plates is parallel to the vertical part, and the operating shaft is fixedly connected with a crank arm; an upper through hole is provided on the upper part of a pressure rod, and a lower through hole is provided on the lower part, the upper through hole is a circular hole, and the lower through hole is a long strip through hole distributed along the length direction of the pressure rod, and an upper connecting hole is provided on one end of the crank arm, and each supporting plate is provided with a lower connecting hole, an upper connecting pin passes through the upper connecting hole and the upper through hole so that the upper part of the pressure rod is hinged with the crank arm, and a lower connecting pin passes through the lower connecting hole and the lower through hole so that the lower part of the pressure rod is located between the two support plates, and a compression spring is sleeved on the middle part of the pressure rod, and a shoulder is provided on the upper part of the pressure rod, and the shoulder presses the upper end of the compression spring, and the lower end of the compression spring rests on the upper end surface of the two support plates; A positioning protrusion is extended upward from the middle position of the upper end of each support plate, and two positioning protrusions are inserted into the inner hole of the compression spring to prevent the lower end of the compression spring from moving radially.

2. The energy storage mechanism for a power conversion switch according to claim 1, characterized in that: A notch is provided in the middle of the lower end of each support plate to facilitate forming, and reinforcing convex parts are provided at the connection between the two sides of the lower end of each support plate and the transverse part.

3. The energy storage mechanism for a power conversion switch according to claim 1, characterized in that: The pressure rod is formed by stamping a metal plate and is T-shaped. The two support plates are provided with limiting protrusions on the facing sides. The two limiting protrusions limit the movement of the lower part of the pressure rod along the thickness direction thereof.

4. An energy storage mechanism for a power conversion switch according to any one of claims 1 to 3, characterized in that: The vertical part is fixedly connected with a micro switch mounting seat, on which a micro switch is mounted. The working state of the power conversion switch is determined by the controller through whether the crank arm touches the spring of the micro switch.

5. The energy storage mechanism for a power conversion switch according to claim 4, characterized in that: The mounting seat includes two parallel side portions and a connecting portion connecting the two side portions, at least two elastic arms are provided on the two side portions, one end of each elastic arm is connected to one side portion, and the other end is provided with a positioning convex portion, and the elastic arms on different side portions are positioned in pairs corresponding to each other to form a plurality of pairs of elastic arms, and the two positioning convex portions on each pair of elastic arms are positioned facing each other, and when the micro switch is installed between the two side portions, the positioning convex portion on each elastic arm is inserted into the mounting through hole of the micro switch housing; The mounting seat is attached to the vertical part of the L-shaped base through a side part, the vertical part is provided with at least two positioning holes, and the side part attached to the vertical part is provided with at least two positioning columns, each positioning column cooperates with one of the positioning holes.

6. The energy storage mechanism used in a power conversion switch according to claim 5, characterized in that: Each of the positioning protrusions is provided with a guiding inclined surface. When the micro switch is installed between the two side portions, the housing of the micro switch drives the elastic arm to deform and shift through the guiding inclined surface.

7. The energy storage mechanism for a power conversion switch according to claim 6, characterized in that: Each of the positioning protrusions is cylindrical, and the guiding slope is arranged on the end surface of the positioning protrusion.

8. The energy storage mechanism used in a power conversion switch according to claim 5, characterized in that: The side portions are in a "<" shape, and each side portion has two elastic arms at one end and one elastic arm at the other end.

9. The energy storage mechanism used in a power conversion switch according to claim 8, characterized in that: A fixing through hole is also provided on the other end of each side portion, and the positions of the two fixing through holes correspond to each other; A first micro switch is installed between one end of the two side parts, and each mounting through hole on the housing of the first micro switch is snapped into position by two positioning protrusions; A second micro switch is installed between the other ends of the two side portions, a mounting through hole on the housing of the second micro switch is snapped into position by the two positioning protrusions, and a fixing screw passes through the fixing through hole on the other end of each side portion and also passes through another mounting through hole on the housing of the second micro switch to position the second micro switch; The fixing screw is also locked on the vertical part, and the crank arm cooperates with the first micro switch and the second micro switch respectively and determines the working state of the conversion switch through the controller.

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