Reducing mechanism for automatic change-over switch and automatic change-over switch

Abstract

The utility model discloses a speed reducing mechanism for an automatic change-over switch and the automatic change-over switch, and relates to the technical field of low-voltage electric appliances. The speed reduction mechanism for the automatic change-over switch comprises a speed reduction wheel and a rocker, the speed reduction wheel is movably arranged on an output shaft of an operating mechanism of the automatic change-over switch in a sleeving mode, a speed reduction rail is arranged on the speed reduction wheel, and the rocker is connected with the speed reduction wheel. The output part of the operating mechanism is abutted against the speed reduction wheel after running for a certain idle stroke, the speed reduction wheel is forced to rotate, and the rocker is driven to move along the speed reduction track to decelerate rotation of the output shaft. The speed reducing mechanism for the automatic change-over switch and the automatic change-over switch can solve the problem of power supply short circuit caused by too fast switching of the moving contact between the common closing position and the standby closing position in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a speed reduction mechanism for an automatic transfer switch and the automatic transfer switch. Background Art

[0002] Automatic transfer switches are commonly used in power distribution systems. They are generally used to monitor power circuits and automatically switch one or more load circuits between normal power and backup power, thereby providing uninterrupted power supply to the loads and ensuring power supply continuity.

[0003] Compared with the conventional automatic transfer switch with dual-shaft dual-group moving contacts, the automatic transfer switch with single-shaft single-group moving contacts in the prior art has the advantages of high performance index, small size, low cost, simple structure, etc. However, the moving contacts of the existing automatic transfer switches switch between the common closing position and the standby closing position too quickly, resulting in the moving contacts contacting another power source before the arc between the moving contacts and the previous power source is extinguished, resulting in the risk of power short circuit. Utility Model Content

[0004] The utility model aims to provide a deceleration mechanism for an automatic transfer switch and an automatic transfer switch, which can solve the problem of power supply short circuit caused by too fast switching of the moving contact between the common closing position and the standby closing position in the prior art.

[0005] The embodiment of the utility model is achieved as follows:

[0006] The first aspect of the embodiment of the utility model provides a deceleration mechanism for an automatic transfer switch, comprising a deceleration wheel and a rocker, wherein the deceleration wheel is movably sleeved on the output shaft of the operating mechanism of the automatic transfer switch, the deceleration wheel is provided with a deceleration track, the rocker is connected to the deceleration wheel, and during the conversion process between the common closing position and the standby closing position of the operating mechanism, the output member of the operating mechanism abuts against the deceleration wheel after running a period of idle travel, forcing the deceleration wheel to start rotating, driving the rocker to move along the deceleration track, so as to decelerate the rotation of the output shaft. The deceleration mechanism for an automatic transfer switch can solve the problem of power supply short circuit caused by too fast conversion of the moving contact between the common closing position and the standby closing position in the prior art.

[0007] Optionally, the reduction wheel and the output member are at the same level and are arranged at intervals. Along the circumferential direction of the reduction wheel, the reduction wheel has a first abutting portion and a second abutting portion that are relatively arranged. When the operating mechanism is switched from the normal closing position to the standby closing position, the output member moves a section of idle stroke and then abuts against the first abutting portion. When the operating mechanism is switched from the standby closing position to the normal closing position, the output member moves a section of idle stroke and then abuts against the second abutting portion.

[0008] Optionally, a pin shaft is further included, a connecting hole is provided on the rocker, the pin shaft is passed through the connecting hole and is slidably arranged in the deceleration track.

[0009] Optionally, the deceleration track has a first deceleration part and a second deceleration part arranged relatively to each other along the extension direction of the deceleration track, and the pin shaft moves to a position where the second deceleration part is located after colliding with the first deceleration part to rotate the rocker, and the pin shaft continues to move to a position where the second deceleration part is located after colliding with the second deceleration part to rotate the rocker in the opposite direction and reset.

[0010] Optionally, the first deceleration portion and the second deceleration portion are located at a middle position between opposite ends of the deceleration track.

[0011] Optionally, the deceleration track is in an arc shape, the first deceleration portion is a protrusion protruding toward a side close to the output shaft, and the second deceleration portion is a groove matching the protrusion.

[0012] Optionally, a counterweight is provided on the rocker.

[0013] The second aspect of the embodiment of the utility model provides an automatic transfer switch, including an operating mechanism and the above-mentioned speed reduction mechanism for the automatic transfer switch, wherein the operating mechanism includes an input member, an output member and an output shaft, wherein the input member is connected to the output member, and the output member is fixedly sleeved on the output shaft. The speed reduction mechanism for the automatic transfer switch can solve the problem of power supply short circuit caused by too fast switching of the moving contact between the common closing position and the standby closing position in the prior art.

[0014] Optionally, the operating mechanism further includes an energy storage spring, the input member rotates to store energy in the energy storage spring, and after the operating mechanism passes through a neutral point position, the energy storage spring releases energy to force the input member to drive the output member to rotate.

[0015] Optionally, the input member and the output member are sector gears.

[0016] The beneficial effects of the embodiments of the utility model include:

[0017] The deceleration mechanism includes a deceleration wheel and a rocker, the deceleration wheel is movably sleeved on the output shaft of the operating mechanism of the automatic transfer switch, the deceleration wheel is provided with a deceleration track, the rocker is connected to the deceleration wheel, and during the conversion process between the common closing position and the standby closing position of the operating mechanism, the output member of the operating mechanism abuts against the deceleration wheel after running a period of idle stroke, so as to force the deceleration wheel to start rotating, and then drive the rocker to move along the deceleration track, so as to provide resistance to the rotation of the deceleration wheel through the rocker, thereby decelerating the rotation of the output shaft. The deceleration mechanism can solve the problem of power short circuit caused by the excessively fast conversion of the moving contact between the common closing position and the standby closing position in the prior art. The design of the idle stroke of the output member can ensure that the deceleration effect of the deceleration mechanism on the rotation of the output shaft occurs after the arc extinguishing stroke of the operating mechanism, and the idle stroke of the output member will not affect the initial opening of the operating mechanism, thereby avoiding the deceleration of the speed of the moving contact and the static contact at the initial opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of an automatic transfer switch provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of the automatic transfer switch provided by the embodiment of the utility model in a common closing position;

[0021] Figure 3 A schematic diagram of the structure of the automatic transfer switch provided by the embodiment of the utility model in the neutral point position;

[0022] Figure 4 A schematic diagram of the structure of the pin shaft colliding with the first speed reduction part provided in an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the structure of the pin shaft colliding with the second speed reducing part provided in an embodiment of the utility model;

[0024] Figure 6 A schematic diagram of the structure of the automatic transfer switch provided by the embodiment of the utility model in the standby closing position;

[0025] Figure 7 A schematic structural diagram of a reduction wheel provided in an embodiment of the utility model.

[0026] Icons: 100-automatic transfer switch; 10-operating mechanism; 11-input member; 12-output member; 13-output shaft; 14-energy storage spring; 20-reduction mechanism; 21-reduction wheel; 21a-first abutment portion; 21b-second abutment portion; 211-reduction track; 2111-first reduction portion; 2112-second reduction portion; 22-rocker; 221-counterweight; 23-pin shaft. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Compared with the traditional automatic transfer switch with dual-axis and dual-set moving contacts, the automatic transfer switch with single-axis and single-set moving contacts in the prior art switches between the normal closing position and the standby closing position too quickly, with the fastest speed being about 15ms. As a result, the moving contact may contact another power supply before the arc between the moving contact and the previous power supply is extinguished, resulting in the risk of short circuit between the two power supplies, which seriously affects the safety performance of the product.

[0034] To solve the above problems, please refer to Figures 1 to 7 The embodiment of the present application provides an automatic transfer switch 100, including an operating mechanism 10 and a speed reduction mechanism 20 (hereinafter referred to as the speed reduction mechanism 20) for the automatic transfer switch 100. The operating mechanism 10 includes an input member 11, an output member 12 and an output shaft 13. The input member 11 is connected to the output member 12. The output member 12 is fixedly sleeved on the output shaft 13, so that when the input member 11 is driven, it can drive the output member 12 to rotate, thereby driving the output shaft 13 to rotate, and then driving the moving contact assembly fixedly sleeved on the output shaft 13 to rotate, so as to open and close the switch with the static contact assembly. By way of example, in this embodiment, the input member 11 and the output member 12 are sector gears.

[0035] The moving contact assembly includes a contact bracket and two moving contacts fixedly arranged on the contact bracket, and the static contact assembly includes two static contacts respectively fixedly arranged in the housing of the automatic transfer switch 100. When one of the moving contacts is closed with the corresponding static contact and the other moving contact is opened with the corresponding static contact, the automatic transfer switch 100 is in the normal power closed state; when the two moving contacts are opened with the corresponding two static contacts respectively, the automatic transfer switch 100 is in the double open state; when one of the moving contacts is opened with the corresponding static contact and the other moving contact is closed with the corresponding static contact, the automatic transfer switch 100 is in the standby power closed state.

[0036] Specifically, Figures 1 to 7As shown, the deceleration mechanism 20 includes a deceleration wheel 21 and a rocker 22. The deceleration wheel 21 is movably sleeved on the output shaft 13 of the operating mechanism 10 of the automatic transfer switch 100. A deceleration track 211 is provided on the deceleration wheel 21. The rocker 22 is connected to the deceleration wheel 21. During the conversion process between the common closing position and the standby closing position of the operating mechanism 10, the output member 12 of the operating mechanism 10 abuts against the deceleration wheel 21 after running a period of idle travel, forcing the deceleration wheel 21 to start rotating, thereby driving the rocker 22 to move along its deceleration track 211 to decelerate the rotation of the output shaft 13. The deceleration mechanism 20 can solve the problem of power supply short circuit caused by too fast conversion of the moving contact between the common closing position and the standby closing position in the prior art.

[0037] It should be noted that the reduction wheel 21 and the output member 12 are both sleeved on the output shaft 13. The difference is that the output member 12 is fixedly connected to the output shaft 13, while the reduction wheel 21 is movably connected to the output shaft 13. Therefore, when the input member 11 drives the output member 12 to start rotating, the output shaft 13 and the output member 12 will start rotating together. The rotation opportunity of the reduction wheel 21 has to wait until the output member 12 runs a period of idle stroke. When the output member 12 abuts against the reduction wheel 21, the output member 12 can drive the reduction wheel 21 to rotate, thereby driving the rocker 22 to move along the deceleration track 211, so as to ensure that the deceleration effect of the reduction mechanism 20 on the rotation of the output shaft 13 occurs after the arc extinguishing stroke of the operating mechanism 10, and the idle stroke of the output member 12 will not affect the initial opening of the operating mechanism 10, thereby avoiding deceleration of the speed of the moving contact and the static contact at the initial opening.

[0038] Specifically, Figures 1 to 6 As shown, the operating mechanism 10 also includes an energy storage spring 14. The input member 11 rotates to store energy in the energy storage spring 14. When the energy storage spring 14 completes energy storage, that is, after the energy storage spring 14 of the operating mechanism 10 passes through the neutral point, the energy storage spring 14 releases energy, forcing the input member 11 to drive the output member 12 to rotate, thereby realizing the rotation of the moving contact to disconnect from the static contact. In combination with the above text, it can be seen that after the energy storage spring 14 passes through the neutral point, the output member 12 needs to run a period of idle travel before the speed reduction mechanism 20 can rotate, so that the speed reduction effect of the speed reduction mechanism 20 on the output shaft 13 occurs in the middle of the conversion process.

[0039] Alternatively, if Figures 2 to 7As shown, the reduction wheel 21 and the output member 12 are at the same level and are arranged at intervals. The reduction wheel 21 has a first abutting portion 21a and a second abutting portion 21b arranged opposite to each other along the circumferential direction of the reduction wheel 21. When the operating mechanism 10 switches from the normal closing position to the standby closing position, the output member 12 moves a section of idle stroke and then abuts against the first abutting portion 21a. When the operating mechanism 10 switches from the standby closing position to the normal closing position, the output member 12 moves a section of idle stroke and then abuts against the second abutting portion 21b. The gap between the reduction wheel 21 and the output member 12 along the circumferential direction of the reduction wheel 21 is the range of the idle stroke of the output member 12.

[0040] Alternatively, if Figures 1 to 6 As shown, the deceleration mechanism 20 further includes a pin 23, a connecting hole is provided on the rocker 22, the pin 23 is inserted into the connecting hole and slidably arranged in the deceleration track 211. Thus, the output member 12 drives the deceleration wheel 21 to rotate, so that the pin 23 moves along the deceleration track 211, and drives the rocker 22 to rotate through the pin 23, so that the rocker 22 can provide resistance to the rotation of the deceleration wheel 21, and then produce a deceleration effect on the output shaft 13.

[0041] Alternatively, if Figures 2 to 7 As shown, along the extension direction of the deceleration track 211, the deceleration track 211 has at least one pair of first deceleration parts 2111 and second deceleration parts 2112 arranged opposite to each other. Figure 4 and Figure 5 As shown, the pin 23 moves to the position where the second deceleration part 2112 is located after colliding with the first deceleration part 2111, so that the rocker 22 rotates, thereby generating resistance to the deceleration wheel 21 along its rotation direction, as shown in FIG. Figure 7 As shown, the pin shaft 23 continues to move until it collides with the second deceleration portion 2112 and then is guided out of the position of the second deceleration portion 2112, so that the rocker arm 22 rotates in the opposite direction and resets, thereby generating resistance to the reduction wheel 21 along its rotation direction. As a result, the pin shaft 23 will generate a deceleration effect on the reduction wheel 21 when passing through the first deceleration portion 2111 and the second deceleration portion 2112, and then generate a deceleration effect on the output shaft 13.

[0042] Alternatively, if Figure 7 As shown, the first deceleration part 2111 and the second deceleration part 2112 are located in the middle position between the opposite ends of the deceleration track 211, so that the deceleration effect of the deceleration mechanism 20 on the output shaft 13 occurs in the middle of the conversion process between the normal closing state and the standby closing state of the automatic transfer switch 100, without affecting the speed of the moving contact and the static contact opening at the beginning of the conversion process. The middle position here includes the absolute middle position and the approximate middle position, and those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific restrictions are made here.

[0043] Alternatively, if Figures 2 to 7 As shown, the shape of the deceleration track 211 is an arc, wherein the center of the arc track is the rotation center of the reduction wheel 21, so that the shape of the deceleration track 211 matches the rotation trajectory of the reduction wheel 21, so that the rocker 22 will not affect the rotation of the output shaft 13 when it moves in the area of ​​the deceleration track 211 other than the first deceleration part 2111 and the second deceleration part 2112. The first deceleration part 2111 is a protrusion protruding toward the side close to the output shaft 13, and the second deceleration part 2112 is a groove matching the protrusion, so that after the pin shaft 23 collides with the first deceleration part 2111, the pin shaft 23 can be guided into the position of the second deceleration part 2112 along the convex surface of the protrusion.

[0044] like Figure 7 As shown, the protrusion matches the groove, which means that the angle between the protruding surface of the protrusion and the track surface of the adjacent deceleration track 211, the angle between the concave surface of the groove and the track surface of the adjacent deceleration track 211, and the protrusion amount of the protrusion and the concave amount of the groove match. Regarding the actual size of the angle between the protruding surface of the protrusion and the track surface of the adjacent deceleration track 211 and the protrusion amount of the protrusion, those skilled in the art should be able to make reasonable selections and designs according to actual conditions, and no specific restrictions are made here.

[0045] Alternatively, if Figures 1 to 6 As shown, a counterweight block 221 is provided on the rocker 22 to increase the weight of the rocker 22 through the counterweight block 221. Regarding the actual weight of the counterweight block 221, those skilled in the art should be able to reasonably select and design it according to actual conditions, and no specific restrictions are made here. It should be understood that as the weight of the counterweight block 221 increases, the time required for the rocker 22 to rotate and reversely rotate and reset is longer, thereby making the deceleration effect of the reduction mechanism 20 on the output shaft 13 more obvious.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

Claims

1. A speed reduction mechanism for an automatic transfer switch, characterized in that: The invention comprises a reduction wheel (21) and a rocker (22), wherein the reduction wheel (21) is movably sleeved on an output shaft (13) of an operating mechanism (10) of an automatic transfer switch (100), a reduction track (211) is arranged on the reduction wheel (21), and the rocker (22) is connected to the reduction wheel (21). During the conversion process between the normal closing position and the standby closing position of the operating mechanism (10), the output member (12) of the operating mechanism (10) abuts against the reduction wheel (21) after running a certain idle stroke, forcing the reduction wheel (21) to rotate, thereby driving the rocker (22) to move along the reduction track (211), so as to reduce the rotation speed of the output shaft (13).

2. The speed reduction mechanism for an automatic transfer switch according to claim 1, characterized in that: The reduction wheel (21) and the output member (12) are at the same level and are arranged at intervals. The reduction wheel (21) has a first abutting portion (21a) and a second abutting portion (21b) arranged opposite to each other along the circumferential direction of the reduction wheel (21). When the operating mechanism (10) switches from the normal closing position to the standby closing position, the output member (12) moves a section of idle stroke and then abuts against the first abutting portion (21a). When the operating mechanism (10) switches from the standby closing position to the normal closing position, the output member (12) moves a section of idle stroke and then abuts against the second abutting portion (21b).

3. The speed reduction mechanism for an automatic transfer switch according to claim 1, characterized in that: It also includes a pin shaft (23), a connecting hole is provided on the rocker (22), the pin shaft (23) is inserted into the connecting hole and is slidably arranged in the deceleration track (211).

4. The speed reduction mechanism for an automatic transfer switch according to claim 3, characterized in that: The deceleration track (211) has a first deceleration part (2111) and a second deceleration part (2112) arranged opposite to each other along the extension direction of the deceleration track (211). The pin shaft (23) moves to a position where the second deceleration part (2112) is located after colliding with the first deceleration part (2111), so that the rocker (22) rotates. The pin shaft (23) continues to move to a position where the second deceleration part (2112) is located after colliding with the second deceleration part (2112), so that the rocker (22) rotates in the reverse direction and resets.

5. The speed reduction mechanism for an automatic transfer switch according to claim 4, characterized in that: The first deceleration portion (2111) and the second deceleration portion (2112) are located at a middle position between opposite ends of the deceleration track (211).

6. The speed reduction mechanism for an automatic transfer switch according to claim 4, characterized in that: The deceleration track (211) is in the shape of an arc, the first deceleration portion (2111) is a protrusion protruding toward a side close to the output shaft (13), and the second deceleration portion (2112) is a groove matching the protrusion.

7. The speed reduction mechanism for an automatic transfer switch according to claim 1, characterized in that: A counterweight block (221) is arranged on the rocker (22).

8. An automatic transfer switch, characterized in that: The invention comprises an operating mechanism (10) and a speed reduction mechanism (20) for an automatic transfer switch (100) as claimed in any one of claims 1 to 7, wherein the operating mechanism (10) comprises an input member (11), an output member (12) and an output shaft (13), wherein the input member (11) is connected to the output member (12), and the output member (12) is fixedly sleeved on the output shaft (13).

9. The automatic transfer switch according to claim 8, characterized in that: The operating mechanism (10) further comprises an energy storage spring (14); the input member (11) rotates to allow the energy storage spring (14) to store energy; after the operating mechanism (10) passes through a neutral point position, the energy storage spring (14) releases energy to force the input member (11) to drive the output member (12) to rotate.

10. The automatic transfer switch according to claim 8, characterized in that: The input member (11) and the output member (12) are sector gears.

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