Transmission mechanism and switch comprising the same

Abstract

The present invention relates to a transmission mechanism and a switch comprising the same for transmitting a driving force between a driving mechanism and a breaking unit of the switch, the driving mechanism comprising a driving member rotatable about a first axis, the transmission mechanism comprising: a transmission lever comprising a second axis, a first end of the transmission lever being connected to the driving member of the driving mechanism so as to be rotatable about the second axis under driving of the driving member, and a bell crank connected to a second end of the transmission lever and rotationally fixedly connected to a main shaft of the breaking unit so as to actuate the main shaft to rotate about a main shaft axis, the main shaft axis, the first axis and the second axis being parallel to each other and non-coincident.

Description

Technical Field

[0001] The present invention relates to a transmission mechanism and a switch including the transmission mechanism. Background Technology

[0002] Switches are commonly used devices in the electrical field. Switches such as load switches and dual-power transfer switches can generally be divided into two functional modules: a drive mechanism and a disconnecting unit. The drive mechanism transfers energy to the moving contact support of the disconnecting unit, causing the moving contact to perform the opening and closing action. The transmission mechanism needs to achieve stable transmission with minimal energy loss during the transmission process.

[0003] In existing switches, the output shaft of the drive mechanism is typically coaxially mounted with the rotating shaft of the breaking unit. This structure is suitable when the ratio of the length to the diameter of the moving contact support in the breaking unit is small. However, if the ratio of the length to the diameter of the moving contact support is large, i.e., when a slender shaft is present, this coaxial arrangement is obviously not conducive to the synchronous opening and closing of the multiple poles of the switch, easily leading to jamming and causing significant energy loss during the transmission process.

[0004] Therefore, a transmission mechanism is needed to achieve stable, reliable, and efficient synchronous transmission between the drive mechanism and the disconnection unit. Summary of the Invention

[0005] In response to the problems and needs mentioned above, this invention proposes a novel transmission mechanism and a switch including the transmission mechanism. The present invention solves the above problems and brings other technical effects by adopting the following technical features.

[0006] On one hand, the present invention provides a transmission mechanism for transmitting driving force between a drive mechanism and a disconnecting unit of a switch. The drive mechanism includes a drive member rotatable about a first axis. The transmission mechanism includes a transmission rod and a crank arm. The transmission rod extends along its longitudinal axis and includes a first end and a second end opposite to each other along the longitudinal axis, and a second axis disposed between the first end and the second end and perpendicular to the longitudinal axis. The first end of the transmission rod is connected to the drive member of the drive mechanism, thereby being rotatable about the second axis under the drive of the drive member. The crank arm is connected to the second end and is rotatably fixedly connected to the main shaft of the disconnecting unit, so that as the transmission rod rotates, the main shaft is actuated to rotate about the main shaft axis between a first closed position, a second closed position, and a double-open position. In the first closed position, The moving contact of the disconnecting unit is in contact with the first stationary contact. In the second closing position, the moving contact of the disconnecting unit is in contact with the second stationary contact. In the double-opening position, the moving contact of the disconnecting unit is separated from the first stationary contact and the second stationary contact. The main shaft axis, the first axis, and the second axis are parallel to each other and do not coincide.

[0007] In some examples, the transmission mechanism further includes a guide with a guide groove connected to the transmission rod at the first end, the guide groove extending along the longitudinal axis, and a mating portion of the drive member extending parallel to the first axis being accommodated within the guide groove and slidable along the guide groove.

[0008] In some examples, the mating part is a first pin fixedly connected to the drive member, and the first pin engages with the guide groove through a lubricating sleeve.

[0009] In some examples, the guide groove is a U-shaped groove.

[0010] In some examples, the transmission rod includes a first surface and a second surface opposite to each other along the second axis, and the number of guides is two, respectively disposed on the first surface and the second surface, to cooperate with the drive members of the drive mechanism disposed on both sides of the transmission mechanism.

[0011] In some examples, the drive rod includes a drive groove at the second end, the drive groove extending along the longitudinal axis and through the drive rod, and the engagement portion of the crank arm extending parallel to the main shaft axis is accommodated within the drive groove and is slidable along the drive groove.

[0012] In some examples, the engagement is a second pin fixedly connected to the crank arm, and the second pin engages with the transmission groove via a lubricating sleeve.

[0013] In some examples, the transmission mechanism further includes a support rod that is connected to the transmission rod perpendicular to the first and second surfaces at the second axis, and the support rod is pivotally connected to the drive mechanism.

[0014] In some examples, the support rod is pivotally connected via bushings to drive mechanisms located on both sides of the transmission mechanism.

[0015] In some examples, the crank arm is splined to the spindle.

[0016] In another aspect, the present invention also proposes a switch comprising at least two drive mechanisms, at least two disconnecting units, and at least one transmission mechanism as described above.

[0017] In some examples, the switch includes: a first drive mechanism and a second drive mechanism, the transmission mechanism being disposed between the first drive mechanism and the second drive mechanism, the first end of the transmission rod being connected to the drive element of both the first drive mechanism and the second drive mechanism, and the first drive mechanism and the second drive mechanism being connected to each other by a synchronizing rod, so that the drive elements of the first drive mechanism and the second drive mechanism move synchronously.

[0018] In some examples, the switch includes a first disconnecting unit and a second disconnecting unit, the transmission mechanism is disposed between the first disconnecting unit and the second disconnecting unit, and the crank arm connects the main shafts of the first disconnecting unit and the second disconnecting unit simultaneously, so that the main shafts of the first disconnecting unit and the second disconnecting unit move synchronously.

[0019] In some examples, the switch further includes a third drive mechanism, a fourth drive mechanism, and a second transmission mechanism. The second transmission mechanism is disposed between the third drive mechanism and the fourth drive mechanism. The first end of the transmission rod of the second transmission mechanism is connected to the drive element of both the third drive mechanism and the fourth drive mechanism. The third drive mechanism and the fourth drive mechanism are connected to each other by a synchronizing rod, so that the drive elements of the third drive mechanism and the fourth drive mechanism move synchronously.

[0020] In some examples, the switch further includes an operating handle disposed between the second drive mechanism and the third drive mechanism and drive members of the second drive mechanism and the third drive mechanism, such that actuation of the operating handle enables synchronous movement of the drive members of the first drive mechanism, the second drive mechanism, the third drive mechanism and the fourth drive mechanism.

[0021] In some examples, the switch further includes a third disconnecting unit and a fourth disconnecting unit, with the second transmission mechanism disposed between the third disconnecting unit and the fourth disconnecting unit. The crank arm of the second transmission mechanism is simultaneously connected to the main shafts of the third disconnecting unit and the fourth disconnecting unit, so that the main shafts of the third disconnecting unit and the fourth disconnecting unit move synchronously.

[0022] The beneficial effects of the technical solution of this invention are as follows: The transmission rod and crank arm of the transmission mechanism proposed in this invention each have their own rotation axis relative to the driving component of the drive mechanism, resulting in stable motion transmission and reducing the likelihood of jamming. The transmission rod and driving component, as well as the transmission rod and crank arm, utilize a sliding groove and pin engagement, which lowers the relative positional accuracy requirements between the mechanism and the disconnecting unit, thus appropriately reducing the precision requirements of the parts and lowering product manufacturing costs. Furthermore, the switch proposed in this invention, including this transmission mechanism, adopts an arrangement where the same transmission mechanism is simultaneously driven by two drive mechanisms and simultaneously drives two disconnecting units, integrating transmission and synchronization functions into one unit. This simultaneously achieves the transmission of energy and synchronous opening and closing operations, resulting in a reliable structure and facilitating system modularization. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure, and are not intended to limit this disclosure.

[0024] Figure 1 A schematic diagram of the structure of a transmission mechanism according to at least one embodiment of the present disclosure is shown;

[0025] Figure 2 A schematic diagram of a transmission mechanism according to at least one embodiment of the present disclosure is shown;

[0026] Figure 3 A partial schematic diagram of a switch according to at least one embodiment of the present disclosure is shown;

[0027] Figure 4 A schematic diagram is shown when the spindle of the splitting unit according to at least one embodiment of the present disclosure is in the bi-splitting position;

[0028] Figure 5 A schematic diagram is shown when the main shaft of the disconnecting unit according to at least one embodiment of the present disclosure is in the first closed position;

[0029] Figure 6 A schematic diagram is shown when the main shaft of the disconnecting unit according to at least one embodiment of the present disclosure is in the second closed position;

[0030] Figure 7A schematic diagram of a switch according to at least one embodiment of the present disclosure is shown.

[0031] List of reference numerals

[0032] 1. Drive mechanism

[0033] 11. Drive components

[0034] 12. Coordination Department

[0035] 121 First pin

[0036] 2. Segmentation Unit

[0037] 21 Moving contact

[0038] 22 First stationary contact

[0039] 23 Second stationary contact

[0040] 3. Transmission rod

[0041] 31 First End

[0042] 32 Second End

[0043] 33 Transmission groove

[0044] 34 First Surface

[0045] 35 Second Surface

[0046] 4. Crank arm

[0047] 41 Joint

[0048] 411 Second pin

[0049] 42 External splines

[0050] 5 support rods

[0051] 51 bushing

[0052] 6. Guide

[0053] 61 Guide groove

[0054] 71 First drive mechanism

[0055] 72 Second drive mechanism

[0056] 73 Third drive mechanism

[0057] 74 Fourth drive mechanism

[0058] 81 First Segmentation Unit

[0059] 82 Second Segmentation Unit

[0060] 83 Third segmentation unit

[0061] 84 Fourth segmentation unit

[0062] 9, 9' Transmission Mechanism

[0063] 10 Switches

[0064] 20' Synchronizing rod

[0065] 30 Operating handle

[0066] A First Axis

[0067] B Second Axis

[0068] C. Spindle axis

[0069] D Longitudinal axis Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0071] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0072] Figure 1 A schematic diagram of the structure of a transmission mechanism according to at least one embodiment of the present disclosure is shown. Figure 2A schematic diagram of a transmission mechanism according to at least one embodiment of the present disclosure is shown. Figure 3 A partial schematic diagram of a switch according to at least one embodiment of the present disclosure is shown. Figure 4 A schematic diagram is shown of the splitting unit in the bi-splitting position according to at least one embodiment of the present disclosure. Figure 5 A schematic diagram is shown of the main shaft of the disconnecting unit according to at least one embodiment of the present disclosure when it is in the first closed position. Figure 6 A schematic diagram is shown of the main shaft of the disconnecting unit according to at least one embodiment of the present disclosure in the second closed position. Figure 7 A schematic diagram of a switch according to at least one embodiment of the present disclosure is shown.

[0073] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this disclosure may have fewer components, other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, without departing from the spirit of this disclosure, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0074] For ease of description, the accompanying drawings of this disclosure accordingly simplify or omit components commonly used in the art, such as switch housings, drive mechanisms, and other components of the disconnecting unit that are not relevant to the description of this disclosure. These omitted or simplified components do not affect the understanding of this disclosure by those skilled in the art.

[0075] To address the shortcomings of existing technologies, this disclosure proposes a novel transmission mechanism and a switch including this mechanism. The transmission rod and crank arm each have their own rotation axes relative to the driving component of the drive mechanism, ensuring stable motion transmission. This disclosure also relates to the arrangement of the transmission mechanism, disconnecting unit, and drive mechanism in the switch. It employs a configuration where the same transmission mechanism is simultaneously driven by two drive mechanisms, driving two disconnecting units concurrently. This integrates transmission and synchronization functions, simultaneously achieving the transmission of energy and synchronous opening and closing operations. Preferred embodiments of the transmission mechanism and switch according to this disclosure are described below with reference to the accompanying drawings.

[0076] It should be noted that, for example, Figure 1 and Figures 4 to 6 In the planar schematic diagrams shown, since the axis of rotation of the component is perpendicular to the plane of the paper, these axes are identified in these figures as points or cross-sections (circles) of the axis.

[0077] like Figure 1As shown, the switch according to at least one embodiment of this disclosure includes a drive mechanism 1 and a disconnecting unit 2. The drive mechanism 1 and the disconnecting unit 2 are connected by a transmission mechanism to convert the opening and closing actions of the drive mechanism 1 into the contact and disconnection of the moving and stationary contacts in the disconnecting unit 2. Specifically, the drive mechanism 1 includes a drive member 11 rotatable about a first axis A. The drive member 11, as an output element of the drive mechanism 1, outputs driving force to the transmission mechanism. Correspondingly, the main shaft 24 of the disconnecting unit 2, as an input element of the disconnecting unit, receives the driving force transmitted through the transmission mechanism. The main shaft 24 is connected to the moving contact of the disconnecting unit, thereby causing the moving contact to move to different positions as the main shaft 24 rotates, thus achieving the contact and disconnection of the moving and stationary contacts.

[0078] Specifically, such as Figures 4 to 6 As shown, the main shaft 24 of the disconnecting unit 2 can rotate around the main shaft axis C between the first closing position, the second closing position, and the double-opening position. For example, in the first closing position, the moving contact 21 of the disconnecting unit 2 is in contact with the first stationary contact 22; in the second closing position, the moving contact 21 of the disconnecting unit is in contact with the second stationary contact 22; and in the double-opening position, the moving contact 21 of the disconnecting unit 2 is disconnected from the first stationary contact 22 and the second stationary contact 23. It should be noted that... Figures 4 to 6 The example switch shown is a dual-power transfer switch, used to automatically switch one or more load circuits from one power supply to another to continuously supply power to the load. Alternatively, the actuation mechanism proposed in this disclosure is also applicable to other types of switches, such as switches or circuit breakers that only have on / off functions.

[0079] In the illustrated embodiment, the drive mechanism 1 and the disconnecting unit 2 are separate units, connected by a transmission mechanism. Alternatively, the transmission mechanism described in this disclosure can also be applied to switches where the drive mechanism and the disconnecting unit are integrated.

[0080] Combination Figures 1 to 3 According to at least one embodiment of the transmission mechanism disclosed herein, a transmission rod 3, a crank arm 4, a support rod 5, and a guide member 6 are included. The transmission rod 3 extends along its longitudinal axis D and includes a first end 31 and a second end 32 opposite to each other along the longitudinal axis D. The first end 31 is connected to the drive member 11 of the drive unit 1, and the second end 32 is connected to the crank arm 4. The crank arm 4 is rotatably and fixedly connected to the main shaft 24 of the disconnecting unit 2. Figures 1 to 3 (Not shown in the image). Optionally, the crank arm 4 can be coaxially arranged with the main shaft 24 and rotatedly fixedly connected by a connection feature such as a spline. Furthermore, the transmission rod 3 includes a first surface 34 and a second surface 35 that are opposite each other.

[0081] The transmission rod 3 is rotatably connected to the housing of the drive mechanism 1 or the housing of the switch (not shown), so that it can rotate along its axis of rotation, for example... Figure 2 The second axis B shown rotates. The second axis B is perpendicular to the first surface 34 and the second surface 35. Optionally, the transmission rod 3 is rotatably connected to the housing of the drive mechanism 1 by a support rod 5 extending along the second axis B. A nut may be provided at the second axis B of the transmission rod 3, and the support rod 5 is fixedly installed to the transmission rod 3 by a threaded connection. Alternatively, the transmission rod 3 may also be connected to the drive mechanism 1 by welding or bonding, or integrally formed with the transmission rod 3. The support rod 5 may, for example, pass through the transmission rod 3, or the support rod 5 may include two separate parts connected to the first surface 34 and the second surface 35 respectively, thereby pivotally connected to the drive mechanism 1 located on both sides of the transmission mechanism. To facilitate support and lubrication of the support rod 5, a bushing 51 may be provided between the support rod 5 and the drive mechanism 1.

[0082] In this embodiment, the main shaft axis C, the first axis A, and the second axis B are parallel to each other and do not coincide. Unlike the prior art where the output shaft of the drive mechanism is coaxial with the rotation axis of the breaking unit, the transmission mechanism proposed in this invention has significant advantages. By setting the aforementioned axes to be parallel to each other and not coincident, the drive member 11, the transmission rod 3, and the main shaft 3 (including the crank arm 4) each have their own rotation center or rotation axis, enabling stable motion transmission and reducing the likelihood of jamming. This is particularly advantageous for applications where the ratio of the length to the diameter of the moving contact bracket in the breaking unit is large.

[0083] Therefore, in operation, the drive mechanism 1 is subjected to an external driving force, causing the drive component 11 to rotate around the first axis A, thereby driving the transmission rod 3 to rotate around the second axis B, which in turn drives the crank arm 4 to rotate, ultimately driving the main shaft 24 to rotate around the main shaft axis C. The movement of the main shaft 24 between the first closed position, the second closed position, and the double-open position will be discussed later. Figures 4 to 6 Detailed description.

[0084] Refer again Figures 1 to 3 The connection between the transmission rod 3 at its first end 31 and the drive member 11 of the drive mechanism 1 can be exemplarily achieved by a guide member 6 having a guide groove 61. The guide member 6 is connected to the transmission rod 3 at its first end 31, and the guide groove 61 of the guide member 6 extends along the longitudinal axis D. The guide member 6 can be fixedly connected to the transmission rod 3, for example, by means of screw connection, bonding, or welding. The guide groove 61 can be exemplarily a U-shaped groove, such as... Figure 2As shown. Accordingly, the drive member 11 may have a mating portion 12 extending parallel to the first axis A, the mating portion 12 being received within the guide groove 61 and slidable along the guide groove 61. The mating portion 12 is offset from the first axis A and may, for example, employ a first pin 121 fixedly connected to the drive member 11, thus... Figure 3 In the accompanying drawings, reference numerals 12 and 121 denote the same component. Alternatively, the mating part 12 may also be in other ways, such as an integrally formed protrusion extending from the drive member 1, as long as it can be accommodated within the guide groove 61 and slide along the guide groove 61.

[0085] For example, such as Figure 2 As shown, there are two guide members 6, respectively disposed on the first surface 34 and the second surface 35, to cooperate with the drive members 11 of the drive mechanisms 1 disposed on both sides of the transmission mechanism 1. Therefore, the transmission mechanism proposed in this disclosure allows for simultaneous and synchronous driving by two drive mechanisms 1, enabling... Figure 7 The arrangement of the switches shown becomes possible. The specific arrangement of the switches will be discussed in conjunction with... Figure 7 Detailed description of its embodiments.

[0086] Exemplarily, the transmission rod 3 may include a transmission groove 33 at its second end 32. The transmission groove 33 extends along the longitudinal axis D and is a through groove penetrating the transmission rod 3. The transmission groove 33 is a straight groove with semi-circular ends. Correspondingly, the crank arm 4 may include a connecting portion 41 extending parallel to the main shaft axis C. The connecting portion 41 is offset from the main shaft axis C, so that the crank arm 4 can be rotated by driving the connecting portion 41. The connecting portion 41 is accommodated within the transmission groove 33 and is slidable along the transmission groove 33. The connecting portion 41 may, for example, be a second pin 411 fixedly connected to the crank arm 4. Figure 3 In the accompanying drawings, reference numerals 41 and 411 denote the same components. Optionally, there may be two crank arms 4, which are respectively connected to the main shafts 24 of the splitting units 22 located on both sides of the transmission mechanism, and the two crank arms 4 are connected by a second pin 411. The transmission rod 3 is located between the two crank arms 4, so that the movement of the two crank arms 4, and thus the movement of the main shafts 24 of the two splitting units 22, can be driven by the movement of only one second pin 411.

[0087] For example, the crank arm 4 and the spindle 24 can be connected by a spline connection, such as... Figure 3 As shown, the crank arm 4 may be provided with an external spline 42, and the main shaft 24 is correspondingly provided with an internal spline (not shown) that mates with the external spline 42, thereby realizing a rotational fixed connection between the crank arm 4 and the main shaft 24.

[0088] The following will combine Figures 4 to 6The movement of the transmission mechanism and switch during operation is described in detail. It should be noted that, in this embodiment, the disconnecting unit 2 includes a moving contact 21, a first stationary contact 22, and a second stationary contact 23. The first stationary contact 22 is electrically connected to the first power input terminal (not shown), the second stationary contact 23 is electrically connected to the second power input terminal (not shown), the moving contact 21 is electrically connected to the load terminal (not shown), and the main shaft 24 is connected to the moving contact 21.

[0089] Firstly, as Figure 4 As shown, the main shaft 24 is in the split position at this time, and the moving contact 21 is disconnected from both the first stationary contact 22 and the second stationary contact 23. The first stationary contact 22 and the second stationary contact 23 are located on both sides of the moving contact 21, and the load is not connected to any power source at this time. At this time, the transmission rod 3 is in a roughly horizontal position, and the second pin 411 is in the middle position of the transmission groove 33.

[0090] When the first power supply needs to be connected, the operator actuates the drive mechanism 1, causing the drive element 11 to move along... Figure 5 The counterclockwise rotation, as shown, causes the first pin 121 to slide within the guide groove 61, thereby driving the transmission rod 3 along... Figure 5 The clockwise rotation, as shown, causes the second pin 411 to slide to the right in the transmission groove 33, thereby driving the crank arm 4 along... Figure 5 As shown, the main shaft 24, which is coaxially connected to the crank arm 4, also rotates counterclockwise, so that the main shaft 24 eventually moves to the first closing position, and the moving contact 21 contacts the first stationary contact 22 located on its right, thereby connecting the first power supply.

[0091] Similarly, when a second power source needs to be connected, the operator actuates the drive mechanism 1, causing the drive element 11 to move along... Figure 6 The clockwise rotation, as shown, causes the first pin 121 to slide within the guide groove 61, thereby driving the transmission rod 3 along... Figure 6 The counterclockwise rotation, as shown, causes the second pin 411 to slide to the right in the transmission groove 33, thereby driving the crank arm 4 along... Figure 6 As shown, the main shaft 24, which is coaxially connected to the crank arm 4, also rotates clockwise, so that the main shaft 24 eventually moves to the second closing position, and the moving contact 21 contacts the second stationary contact 23 located on its left, thereby connecting the second power supply.

[0092] Conversely, if it is necessary to disconnect the first or second power supply, or switch between the two power supplies, the operator only needs to perform the opposite operation as connecting the power supply. For example, to disconnect the first power supply, the operator can actuate the drive mechanism 1 to rotate the drive member 11 clockwise, thereby moving the spindle 24 to the double-split position; to disconnect the second power supply, the operator can actuate the drive mechanism 1 to rotate the drive member 11 counterclockwise, thereby also moving the spindle 24 to the double-split position, which will not be elaborated further here.

[0093] To reduce friction from relative motion, all pins that move relative to each other, such as the first pin 121 and the second pin 411, are provided with lubricating sleeves, such as metal bushings. Specifically, the first pin 121 engages with the guide groove 61 through the lubricating sleeve, and the second pin 411 engages with the transmission groove 33 through the lubricating sleeve.

[0094] Therefore, the transmission rod 3 is connected to the drive component 11 and the crank arm 4 by sliding groove and pin. This arrangement requires lower relative positional accuracy between the drive mechanism 1 and the splitting unit 2, which can appropriately reduce the requirements for part accuracy and assembly accuracy, thereby reducing production and manufacturing costs.

[0095] The above are merely preferred embodiments of this disclosure. Equivalent variations, substitutions, and combinations conceived by those skilled in the art based on the concept of this invention are also included within the scope of protection of this disclosure. For example, the guide groove 61 and transmission groove 33 do not necessarily have to extend along the longitudinal axis D, or they can extend at a certain angle to the longitudinal axis. Furthermore, the structures of the guide groove 61 and transmission groove 33 can be interchanged. For example, a transmission groove can be provided at the first end 31, and a guide member with a guide groove can be provided at the second end 32. Correspondingly, the mating portion of the drive member and the joint portion of the crank arm are also modified accordingly.

[0096] This disclosure also provides a switch, including at least two drive mechanisms, at least two disconnecting units, and at least one transmission mechanism as described above. For example, the switch in this disclosure can be an electrical switch such as a load switch, a dual-power transfer switch, or a circuit breaker switch.

[0097] exist Figure 7 In the illustrated embodiment, the switch has four drive mechanisms 71, 72, 73, 74, four breaking units 81, 82, 83, 84, and two transmission mechanisms 9, 9'. Each pair of drive mechanisms 71, 72 and 73, 74, each pair of breaking units 81, 82 and 83, 84, and one transmission mechanism 9, 9' constitute a switch module. Therefore, Figure 7 The switch in the illustrated embodiment includes two switch modules.

[0098] A transmission mechanism 9 is disposed between the first drive mechanism 71 and the second drive mechanism 72. The first end of the transmission rod of the transmission mechanism 9 is simultaneously connected to the driving components of both the first drive mechanism 71 and the second drive mechanism 72. The first drive mechanism 71 and the second drive mechanism 72 are connected to each other via a synchronizing rod 20, so that the driving components of the first drive mechanism 71 and the second drive mechanism 72 move synchronously. Correspondingly, the transmission mechanism 9 is disposed between the first breaking unit 81 and the second breaking unit 82. The crank arm of the transmission mechanism 9 is simultaneously connected to the main shafts of both the first breaking unit 81 and the second breaking unit 82, so that the main shafts of the first breaking unit 81 and the second breaking unit 82 move synchronously.

[0099] Similarly, a transmission mechanism 9' is disposed between the third drive mechanism 73 and the fourth drive mechanism 74. The first end of the transmission rod of the transmission mechanism 9 is connected to the driving components of both the third drive mechanism 73 and the fourth drive mechanism 74. The third drive mechanism 73 and the fourth drive mechanism 74 are connected to each other via a synchronizing rod 20', enabling the driving components of the third drive mechanism 73 and the fourth drive mechanism 74 to move synchronously. Correspondingly, a transmission mechanism 9 is disposed between the third splitting unit 83 and the fourth splitting unit 84. The crank arm of the transmission mechanism 9 is connected to the main shafts of both the third splitting unit 83 and the fourth splitting unit 84, enabling the main shafts of the third splitting unit 83 and the fourth splitting unit 84 to move synchronously.

[0100] Furthermore, in order to achieve synchronous movement between the second drive mechanism 72 and the third drive mechanism 73, the switch may also include an operating handle 30. The operating handle is disposed between the second drive mechanism 72 and the third drive mechanism 73 and is drively connected to the drive components of the second drive mechanism 72 and the third drive mechanism 73. By actuating the operating handle 30, synchronous movement of the drive components of the second drive mechanism 72 and the third drive mechanism 73 is achieved, thereby achieving synchronous movement of the drive components of the four drive mechanisms 71, 72, 73, and 74. Correspondingly, the main shafts of the four breaking units 81, 82, 83, and 84 can also achieve synchronous movement.

[0101] Therefore, the switch proposed in this disclosure adopts a modular design. Each module uses the same transmission mechanism, which is simultaneously driven by two drive mechanisms and drives two disconnecting units simultaneously. This integrates transmission and synchronization functions, realizing both the transmission of energy and synchronous opening and closing operations. Different modules are connected by operating handles to achieve synchronous transmission. This modular design facilitates manufacturing and assembly, and has extensive expandability and replaceability.

[0102] The above description is merely a specific embodiment of this disclosure, but the protection scope of this disclosure is not limited thereto. Any changes, substitutions or combinations that can be easily conceived by those skilled in the art within the technical scope disclosed in this disclosure or under the ideas disclosed in this disclosure should be covered within the protection scope of this disclosure.

Claims

1. A transmission mechanism for transmitting driving force between a drive mechanism and a disconnection unit of a switch, the drive mechanism including a drive member rotatable about a first axis, the transmission mechanism comprising: A transmission rod extends along the longitudinal axis of the transmission mechanism and includes a first end and a second end opposite to each other along the longitudinal axis, and a second axis disposed between the first end and the second end and perpendicular to the longitudinal axis. The first end of the transmission rod is connected to a driving member of the driving mechanism, so that it can rotate about the second axis under the drive of the driving member. A crank arm is connected to the second end and is rotatably and fixedly connected to the main shaft of the disconnecting unit, so as to actuate the main shaft to rotate about the main shaft axis between the first closed position, the second closed position, and the double-open position as the transmission rod rotates. In the first closed position, the moving contact of the disconnecting unit is in contact with the first stationary contact; in the second closed position, the moving contact of the disconnecting unit is in contact with the second stationary contact; and in the double-open position, the moving contact of the disconnecting unit is disconnected from both the first and second stationary contacts. Wherein, the main shaft axis, the first axis, and the second axis are parallel to each other and do not coincide, and the transmission mechanism further includes: A guide member having a guide groove is connected to the transmission rod at the first end. The guide groove extends along the longitudinal axis. A mating portion of the drive member extending parallel to the first axis is accommodated within the guide groove and is slidable along the guide groove. The transmission rod includes a first surface and a second surface that are opposite to each other along the second axis and perpendicular to the second axis. There are two guides, which are respectively disposed on the first surface and the second surface, so as to cooperate with the drive members of the drive mechanism disposed on both sides of the transmission mechanism.

2. The transmission mechanism according to claim 1, wherein, The mating part is a first pin that is fixedly connected to the driving component, and the first pin is mated with the guide groove through a lubricating sleeve.

3. The transmission mechanism according to claim 1, wherein, The guide groove is a U-shaped groove.

4. The transmission mechanism according to claim 1, wherein, The transmission rod includes a transmission groove at the second end, the transmission groove extending along the longitudinal axis and penetrating the transmission rod, and the joint of the crank arm extending parallel to the main shaft axis is accommodated in the transmission groove and is slidable along the transmission groove.

5. The transmission mechanism according to claim 4, wherein, The joint is a second pin that is fixedly connected to the crank arm, and the second pin engages with the transmission groove through a lubricating sleeve.

6. The transmission mechanism according to claim 1, further comprising: A support rod is connected to the transmission rod perpendicular to the first and second surfaces at the second axis, and the support rod is pivotally connected to the drive mechanism.

7. The transmission mechanism according to claim 6, wherein, The support rod is pivotally connected to the drive mechanism located on both sides of the transmission mechanism via bushings.

8. The transmission mechanism according to claim 1, wherein, The crank arm is connected to the spindle via a spline.

9. A switch, comprising: At least two drive mechanisms, at least two disengagement units, and at least one transmission mechanism as described in any one of claims 1 to 8.

10. The switch according to claim 9, comprising: A first driving mechanism and a second driving mechanism are provided, and a transmission mechanism is disposed between the first driving mechanism and the second driving mechanism. The first end of the transmission rod is connected to the driving component of both the first driving mechanism and the second driving mechanism. The first driving mechanism and the second driving mechanism are connected to each other through a synchronizing rod, so that the driving components of the first driving mechanism and the second driving mechanism move synchronously.

11. The switch according to claim 10, comprising: The first and second splitting units are connected by a transmission mechanism between them. The crank arm connects the main shafts of both the first and second splitting units, enabling the main shafts of the first and second splitting units to move synchronously.

12. The switch according to claim 10, further comprising: The system comprises a third drive mechanism, a fourth drive mechanism, and a second transmission mechanism. The second transmission mechanism is disposed between the third drive mechanism and the fourth drive mechanism. The first end of the transmission rod of the second transmission mechanism is connected to the drive components of both the third drive mechanism and the fourth drive mechanism. The third drive mechanism and the fourth drive mechanism are connected to each other by a synchronizing rod, so that the drive components of the third drive mechanism and the fourth drive mechanism move synchronously.

13. The switch according to claim 12, further comprising: An operating handle is disposed between the second drive mechanism and the third drive mechanism and is drively connected to the drive components of the second drive mechanism and the third drive mechanism, so that by actuating the operating handle, the drive components of the first drive mechanism, the second drive mechanism, the third drive mechanism and the fourth drive mechanism can move synchronously.

14. The switch according to claim 13, further comprising: The third and fourth disconnection units are connected by a second transmission mechanism, which is located between the third and fourth disconnection units. The crank arm of the second transmission mechanism is connected to the main shafts of both the third and fourth disconnection units, so that the main shafts of the third and fourth disconnection units move synchronously.

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