Interlocking device for reversible contactor group and reversible contactor group with same

Abstract

The utility model relates to an interlocking device for a reversible contactor group and the reversible contactor group with the interlocking device. The interlocking device comprises a shell which is constructed to be of a closed structure and provided with receding holes extending along a straight line along the two opposite sides; the pair of linkage shafts are in lap joint with the avoiding holes in the two opposite sides of the shell respectively, the pair of linkage shafts penetrate through the corresponding avoiding holes from the outer side of the shell respectively and extend to the inner side of the shell, and the ends, located on the outer side of the shell, of the linkage shafts are in linkage with the two contactors respectively; the pair of locking pieces are rotatably mounted in the shell and are respectively linked with the end parts, positioned on the inner side of the shell, of the pair of linkage shafts through connecting pieces, so that when one of the pair of linkage shafts responds to the switching-on action of the corresponding contactor and linearly moves along the corresponding avoiding hole, the locking pieces are locked by the locking pieces; the corresponding locking piece is driven by the linkage shaft through the corresponding connecting piece to rotate to the connection direction side of the other locking piece relative to the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an interlocking device for a reversible contactor group and a reversible contactor group having the interlocking device. Background Art

[0002] Contactors are widely used to control the connection and disconnection of electrical loads such as motors, electric welders, and electric heaters due to their large control capacity, frequent operation, and remote control. A reversible contactor usually includes two juxtaposed contactors and an interlocking device arranged between the two contactors and linked with the two contactors. The two contactors work alternately to control the forward and reverse operation of the motor, for example. The interlocking device can prevent the connection of one contactor when the other contactor is connected, thereby preventing the occurrence of a short circuit. However, the interlocking device in the prior art has the disadvantages of a relatively simple structural design and a relatively short service life.

[0003] Therefore, there is a need in the art for an interlocking device of a reversible contactor group with a more reasonable structural design and a longer service life. Utility Model Content

[0004] The utility model aims to provide an interlocking device for a reversible contactor group which can at least solve part of the above problems.

[0005] The utility model also aims to provide a reversible contactor group using the improved interlocking device.

[0006] According to one aspect of the utility model, an interlocking device for a reversible contactor group is provided, the interlocking device is used to be linked with two contactors of the reversible contactor group, the interlocking device comprising: a shell, which is constructed as a closed structure and is provided with avoidance holes extending in a straight line along opposite sides; a pair of linkage shafts, which are respectively overlapped to the avoidance holes on opposite sides of the shell, the pair of linkage shafts respectively extend from the outside of the shell through the corresponding avoidance holes to the inside of the shell and the ends thereof located on the outside of the shell are respectively linked with the two contactors; a pair of locking members, which are rotatably mounted inside the shell and are respectively linked with the ends of the pair of linkage shafts located on the inside of the shell via connecting members, so that when one of the linkage shafts in the pair of linkage shafts moves in a straight line along the corresponding avoidance hole in response to the connection action of the corresponding contactor, the corresponding locking member is driven by the linkage shaft via the corresponding connecting member and rotates relative to the shell to the connection direction side of the other locking member, thereby preventing the other locking member and the contactor corresponding to the other locking member from performing the connection action.

[0007] Compared with the prior art, the interlocking device in the utility model relatively splits the movement of the interlocking device in response to the contactor's connection action into a linkage shaft and a locking member performing a single movement by arranging a linkage shaft that can move linearly relative to the housing, a locking member that can rotate relative to the housing, and a connecting member that transmits the linear movement of the linkage shaft to the rotation of the locking member. This improves the service life of the components of the interlocking device and also facilitates the replacement of components that are accidentally damaged or worn.

[0008] Preferably, substantially the middle portion of each locking member is connected to the housing, and the end of each connecting member adjacent to the corresponding linkage shaft extends to the extension direction of the corresponding avoidance hole, so that each connecting member is arranged in line with the corresponding avoidance hole.

[0009] Preferably, the dimension of each avoidance hole along the linear extension direction is adapted to the moving distance of the corresponding linkage shaft under the switching action, and the dimension of each avoidance hole transverse to the linear extension direction is adapted to the outer diameter dimension of the corresponding linkage shaft.

[0010] Preferably, each locking member is configured as a laminated structure which is stacked in an axial direction of the corresponding linkage shaft.

[0011] Preferably, each locking member includes at least one first laminate and at least one second laminate stacked to the first laminate along the axial direction of the corresponding linkage shaft.

[0012] Preferably, the first lamination includes a connecting section for connecting to a corresponding connecting member and a driving section extending obliquely from a side of the connecting section away from the corresponding connecting member, and the second lamination is stacked to the driving section of the first lamination along the axial direction of the corresponding linkage shaft.

[0013] Preferably, each connecting member is configured as a laminated structure which is stacked in an axial direction of the corresponding linkage shaft and connected to a connecting section of the corresponding locking member.

[0014] Preferably, the interlocking device further comprises a pair of reset members, which are respectively arranged between the pair of locking members and the housing, so that each locking member overcomes the action force of the corresponding reset member to perform a connection action.

[0015] Preferably, the interlocking device further comprises an isolation sheet installed inside the housing and disposed between the pair of linkage shafts, between the pair of connecting members and between the pair of locking members.

[0016] According to another aspect of the utility model, a reversible contactor group is provided, comprising two contactors and an interlocking device disposed between the two contactors and linked with the two contactors, wherein the interlocking device is the aforementioned interlocking device.

[0017] Some of the other features and advantages of the utility model will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 is a side view of a reversible contactor assembly according to the utility model;

[0020] Figure 2 is a three-dimensional view of an interlocking device of a reversible contactor assembly according to the utility model;

[0021] Figure 3 is an exploded view of the interlocking device of the reversible contactor group according to the utility model;

[0022] Figure 4 is a partial schematic diagram of the interlocking device of the reversible contactor group according to the utility model, wherein both contactors of the reversible contactor group are not connected;

[0023] Figure 5 yes Figure 4 A side view of the interlocking device in FIG.

[0024] Figure 6 It is a partial schematic diagram of the interlocking device of the reversible contactor group according to the utility model, wherein one of the two contactors of the reversible contactor group is connected;

[0025] Figure 7 yes Figure 6 A side view of the interlocking device in FIG.

[0026] Figure 8 yes Figure 6 A schematic diagram of a linkage shaft, a connecting member and a locking member of an interlocking device;

[0027] Fig. 9 It is a schematic diagram of a linkage shaft, a connecting piece and a locking piece of an interlocking device of a reversible contactor group according to the utility model, wherein the other contactor of the two contactors of the reversible contactor group is connected.

[0028] Description of reference numerals:

[0029] 100-reversible contactor assembly; 10-interlocking device; 11-housing; 111-front housing; 112-rear housing; 113-avoidance hole; 114-positioning column; 12-coupling shaft; 13-locking member; 131-first lamination stack; 131a-connecting section; 131b-driving section; 132-second lamination stack; 133-spacer lamination; 14-connecting member; 15-reset member; 16-isolating member; 61-installation portion; 162-isolating portion; 20-contactor. DETAILED DESCRIPTION

[0030] Now, with reference to the accompanying drawings, a schematic scheme of the reversible contactor group and its interlocking device disclosed in the utility model is described in detail. Although the drawings are provided to present some embodiments of the utility model, the drawings do not have to be drawn according to the dimensions of the specific embodiments, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the utility model. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0031] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0032] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0033] The terms "joining", "connection" and the like as used in the present invention include both that two components are indirectly connected together by means of an intermediate layer (such as adhesive, welding agent, etc.) or an intermediate piece (such as a connector, transition piece, etc.), and that two components are directly connected together without the aid of any intermediate layer (such as adhesive, welding agent, etc.) or intermediate piece (such as a connector, transition piece, etc.).

[0034] Figure 1The reversible contactor group 100 of the utility model is shown, and the reversible contactor group 100 includes two contactors 20 for respectively controlling the forward operation and reverse operation of the motor and an interlocking device 10 arranged between the two contactors 20. The interlocking device 10 is respectively linked with the contact interlocking parts of the two contactors 20, so that when the moving contact of one contactor 20 engages with the static contact, the moving contact of the other contactor 20 can be prevented from engaging with the static contact, so that the two contactors 20 can work alternately and avoid the short circuit of the motor. It can be understood that the contactor 20 and the structures such as the moving and static contacts and the contact interlocking part inside it are those well known to those skilled in the art, so they are not repeated here.

[0035] Combination Figure 2 and Figure 3 As shown, the interlocking device 10 may include a housing 11 , a pair of linkage shafts 12 , a pair of locking members 13 and a pair of connecting members 14 .

[0036] Specifically, the housing 11 may include a front housing 111 and a rear housing 112 that are joined together to form an internal mounting cavity. It should be noted that the front-to-back direction described herein is for the purpose of clearly illustrating the various components in the present invention, and is not intended to limit the orientation arrangement of the interlocking device 10 provided by the present invention in actual applications. In an embodiment not shown, the front housing 111 and the rear housing 112 may also be connected using fasteners or other connection methods.

[0037] The front housing 111 and the rear housing 112 may be provided with Figure 2 The avoidance holes 113 extend in the up-down direction of the page, and the avoidance holes 113 are arranged relatively in the front-to-back direction. A pair of linkage shafts 12 can be overlapped on the two avoidance holes 113 respectively, so that one linkage shaft 12 passes through the avoidance hole 113 on the front shell 111 from the front side of the front shell 111 to enter the shell 11, and the other linkage shaft 12 passes through the avoidance hole 113 on the rear shell 112 from the rear side of the rear shell 112 to enter the shell 11. In this way, the ends of the two linkage shafts 12 located outside the shell 11 are respectively linked with the contact interlocking parts of the contactors 20 on both sides, and the ends located inside the shell 11 are respectively linked with a pair of locking members 13 via corresponding connecting members 14.

[0038] exist Figure 4 and Figure 5 In the idle state shown, the two linkage shafts 12 are opposed to each other and their ends within the housing 11 are spaced apart from each other to allow the two to move independently relative to each other. Figure 2 and Figure 3 as well as Figures 6 to 8In the first working state shown, the contactor 20 matched with the linkage shaft 12 on the front housing 111 is turned on, and the linkage shaft 12 on the front housing 111 is lifted from the lower side of the avoidance hole 113 of the front housing 111 to the upper side. Fig. 9 In the second working state shown, although the structure such as the housing 11 of the interlocking device 10 is not shown in detail, it can be imagined that the contactor 20 cooperating with the linkage shaft 12 on the rear side shell 112 is connected, and the linkage shaft 12 on the rear side shell 112 is lifted from the lower side of the avoidance hole 113 of the rear side shell 112 to the upper side.

[0039] The locking member 13 is rotatably mounted inside the housing 11 with the front-rear direction as the rotation axis. Figure 4 and Figure 5 As shown, in the idle state, the two locking members 13 are attached to the plane perpendicular to the front-rear direction. Figure 5 The pages are arranged generally symmetrically with respect to each other.

[0040] When the contactor 20 located at the front side is turned on, the interlocking device 10 moves from the idle state to the first working state, such as Figures 6 to 8 As shown, the connection action of the front contactor 20 is converted into the linear motion of the front linkage shaft 12 upward along the avoidance hole 113, and the linear motion of the front linkage shaft 12 is converted into the corresponding locking member 13 via the connecting member 14. Figure 7 and Figure 8 The clockwise rotation of the right locking member 13 is shown. When the on-action of the front contactor 20 is completed, the right locking member 13 moves to the counterclockwise side of the left locking member 13, thereby preventing the possible counterclockwise rotation of the left locking member 13.

[0041] Accordingly, when the contactor 20 located at the rear side is turned on, the interlocking device 10 moves from the idle state to the second working state, such as Fig. 9 As shown, the contactor 20 is switched on and converted into a linear motion of the rear linkage shaft 12 upward along the avoidance hole 113, and the linear motion of the rear linkage shaft 12 is converted into a corresponding locking member 13 via the connecting member 14. Fig. 9 The counterclockwise rotation of the left locking member 13 is shown. When the contactor 20 on the rear side is switched on, the locking member 13 on the left side moves in the clockwise direction of the locking member 13 on the right side, thereby preventing the possible clockwise movement of the locking member 13 on the right side.

[0042] In this way, the linear movement of each linkage shaft 12 and the rotational movement of the corresponding locking member 13 are relatively decoupled.

[0043] Optionally, two positioning posts 114 extending forward may be provided on the inner side of the rear housing 11, and the two positioning posts 114 respectively pass through the through holes in the substantially middle of the two locking members 13 in the front-to-back direction, so that the two locking members 13 can be rotatably mounted to the rear housing 11. In an embodiment not shown, the two positioning posts 114 may be provided on the inner side of the front housing 11 and extend backward, or may be provided on the front housing 11 and the rear housing 11 respectively. The end of the locking member 13 for connecting to the corresponding connecting member 14 may extend to Figure 5 The lower side of the corresponding avoidance hole 113 is shown so that the connecting member 14 whose two ends are respectively connected to the linkage shaft 12 and the locking member 13 extends generally in the up and down direction. The generally colinear arrangement of the connecting member 14 and the corresponding avoidance hole 113 is not only convenient for assembly, but also can convert the linear motion of the corresponding linkage shaft 12 into the rotational motion of the corresponding locking member 13 as efficiently as possible.

[0044] Optionally, the linkage shaft 12 of the interlocking device 10 provided by the present invention only needs to complete linear motion, so the size of the avoidance hole 113 for carrying the linkage shaft 12 in the up-down direction can be designed as the moving distance of the linkage shaft 12 in response to the connection action of the corresponding contactor 20, and the size in the transverse direction to the up-down direction can be designed as the outer diameter size of the linkage shaft 12. This arrangement can reduce the size of the avoidance hole 113 on the housing 11 as much as possible to improve the overall appearance of the interlocking device 10.

[0045] Alternatively, if Figure 3 As shown, the locking member 13 and the connecting member 14 can be designed as a laminated structure stacked in the front-to-back direction, which not only simplifies the manufacturing process of the interlocking device 10 provided by the utility model, but also reduces the manufacturing cost of the interlocking device 10.

[0046] Combination Figure 4 As shown, the locking member 13 may include at least one first laminate 131 and at least one second laminate 132. Specifically, the locking member 13 responsive to the front side contactor 20 includes a plurality of first laminates 131 adjacent to the front side housing 111 and a plurality of second laminates 132 arranged at the rear side of the first laminate 131 at the rearmost side, and the locking member 13 responsive to the rear side contactor 20 includes a plurality of first laminates 131 adjacent to the rear side housing 112 and a plurality of second laminates 132 arranged at the front side of the second laminate 132 at the frontmost side.

[0047] Further integration Figure 5As shown, the first laminate 131 may include a connecting section 131a and a driving section 131b extending from the connecting section 131a. Both ends of the connecting section 131a are rotatably connected to the corresponding connecting member 14 and the housing 11, respectively, and the driving section 131b extends obliquely relative to the connecting section 131a from the end side of the connecting section 131a away from the connecting member 14, so that the connecting section 131a and the driving section 131b generally form a V-shaped structure. The second laminate 132 may be stacked on the driving section 131b of the first laminate 131, and the shape and size of the second laminate 132 may generally match the driving section 131b of the first laminate 131.

[0048] When the number of layers of the first laminate 131 in the present invention is three or more, a spacing laminate 133 having a shape and size substantially matching the driving section 131b of the first laminate 131 may be arranged between adjacent first laminates 131. Figure 3 As shown, this allows gaps to exist between the connecting sections 131a of adjacent first laminates 131 for alternately connecting the multilayer connector 14 also designed as a laminated structure. This arrangement can improve the connection stability between the first laminate 131 and the connector 14.

[0049] like Figure 4 and Figure 5 As shown, the driving section 131b of the first laminate 131 of the locking member 13 has an inner surface facing the other locking member 13, an outer surface facing away from the other locking member 13, and an end side surface connecting the inner surface and the outer surface, which makes the interlocking device 10 move to Figures 6 to 8 In the first working state shown, Figure 7 The end side surface of the right locking member 13 is substantially parallel to the inner side surface of the left locking member 13, that is, the right side surface thereof. It can be understood that Figure 7 The minimum spacing between the end side surface of the right locking member 13 and the right side surface of the left locking member 13 shown in the figure can be designed so that the right locking member 13 just abuts against the right locking member 13, and the maximum possible spacing can be designed to prevent the possible connection action of the left locking member 13.

[0050] Alternatively, if Figures 3 to 5 As shown, the interlocking device 10 may further include a pair of reset members 15, such as reset springs. The two ends of the reset member 15 are respectively connected to one of the locking members 13 and the housing 11, so that when the corresponding locking member 13 rotates in response to the corresponding contactor 20 being turned on, it is necessary to overcome the force of the reset member 15. This arrangement can facilitate the interlocking device 10 that has been moved to the first working state or the second working state to quickly return to the idle state.

[0051] Alternatively, if Figure 3 as well as Figure 6 and Figure 7 As shown, the interlocking device 10 may further include an isolation sheet 16 installed inside the housing 11. The isolation sheet 16 may include a mounting portion 161 for mounting to the housing 11 and an isolation portion 162 that is smaller in size than the mounting portion 161 and extends downward from the lower side of the mounting portion 161 to between a pair of linkage shafts 12, between a pair of connecting members 14, and between a pair of locking members 13. Since the locking members 13 and the connecting members 14 of the interlocking device 10 mentioned in the present embodiment may be constructed as a laminated structure, some errors are inevitably present between the assembled pair of locking members 13 and the pair of connecting members 14, and the connection stability of the interlocking device 10 is improved by means of the isolation portion 162 of the isolation sheet 16.

[0052] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0053] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An interlocking device (10) for a reversible contactor group (100), the interlocking device (10) being used to work in conjunction with two contactors (20) of the reversible contactor group (100), wherein: The interlocking device (10) comprises: A housing (11) is constructed as a closed structure and is provided with avoidance holes (113) extending in a straight line along two opposite sides; A pair of linkage shafts (12) are respectively overlapped with avoidance holes (113) on opposite sides of the housing (11); the pair of linkage shafts (12) respectively extend from the outside of the housing (11) through the corresponding avoidance holes (113) to the inside of the housing (11), and the ends of the linkage shafts (12) located outside the housing (11) are respectively linked with the two contactors (20); A pair of locking members (13) are rotatably mounted inside the housing (11) and are respectively linked with the end portions of the pair of linkage shafts (12) located inside the housing (11) via a connecting member (14), so that when one linkage shaft (12) in the pair of linkage shafts (12) moves linearly along the corresponding avoidance hole (113) in response to the connection action of the corresponding contactor (20), the corresponding locking member (13) is driven by the linkage shaft (12) via the corresponding connecting member (14) to rotate relative to the housing (11) to the connection direction side of the other locking member (13), thereby preventing the other locking member (13) and the contactor (20) corresponding to the other locking member (13) from performing the connection action.

2. The interlocking device (10) for a reversible contactor assembly (100) according to claim 1, characterized in that: The approximate middle portion of each locking member (13) is connected to the housing (11), and the end of each connecting member (14) adjacent to the corresponding linkage shaft (12) extends to the extension direction of the corresponding avoidance hole (113), so that each connecting member (14) and the corresponding avoidance hole (113) are arranged in the same line.

3. The interlocking device (10) for a reversible contactor group (100) according to claim 1, characterized in that: The dimension of each avoidance hole (113) along the linear extension direction is adapted to the moving distance of the corresponding linkage shaft (12) under the switching action, and the dimension of each avoidance hole (113) transverse to the linear extension direction is adapted to the outer diameter dimension of the corresponding linkage shaft (12).

4. An interlocking device (10) for a reversible contactor group (100) according to any one of claims 1 to 3, characterized in that: Each locking member (13) is constructed as a laminated structure which is stacked and arranged axially along the corresponding linkage shaft (12).

5. The interlocking device (10) for a reversible contactor assembly (100) according to claim 4, characterized in that: Each locking member (13) comprises at least one first laminate (131) and at least one second laminate (132) laminated to the first laminate (131) along the axial direction of the corresponding linkage shaft (12).

6. The interlocking device (10) for a reversible contactor assembly (100) according to claim 5, characterized in that: The first lamination stack (131) comprises a connecting section (131a) for connecting to a corresponding connecting member (14) and a driving section (131b) extending obliquely from a side of the connecting section (131a) away from the corresponding connecting member (14), and the second lamination stack (132) is stacked to the driving section (131b) of the first lamination stack (131) along the axial direction of the corresponding linkage shaft (12).

7. The interlocking device (10) for a reversible contactor assembly (100) according to claim 6, characterized in that: Each connecting member (14) is constructed as a laminated structure which is stacked along the axial direction of the corresponding linkage shaft (12) and connected to a connecting section (131a) of the corresponding locking member (13).

8. The interlocking device (10) for a reversible contactor assembly (100) according to claim 1, characterized in that: The interlocking device (10) further comprises a pair of reset members (15), wherein the pair of reset members (15) are respectively arranged between the pair of locking members (13) and the housing (11), so that each locking member (13) overcomes the action force of the corresponding reset member (15) to perform a connection action.

9. The interlocking device (10) for a reversible contactor group (100) according to claim 8, characterized in that: The interlocking device (10) further comprises a spacer (16) installed inside the housing (11) and disposed between the pair of linkage shafts (12), between the pair of connecting members (14) and between the pair of locking members (13).

10. A reversible contactor assembly (100), characterized in that: The reversible contactor group (100) comprises two contactors (20) and an interlocking device (10) disposed between the two contactors (20) and linked with the two contactors (20), wherein the interlocking device (10) is an interlocking device (10) according to any one of claims 1 to 9.

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