Self-locking double-tool-bit disconnecting link
By designing a self-locking double-head knife switch, using collinear gate and self-locking structure, the problems of unstable operation and safety hazards of traditional knife switches are solved, and the stability and safety of operation are improved.
Patent Information
- Application Number
- CN202422343709.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-25
AI Technical Summary
Traditional knife switches lack self-locking and safety protection, and have simple structure, resulting in unstable operation and safety hazards.
A double-head cutter with self-locking head is designed, which uses collinear gate operation, combined with self-locking structure and elastic abutment device to ensure stability of opening or closing, and improve operational safety through the bend and bridge.
The stability and safety of knife switch operation are achieved, safety hazards are reduced, and the safety of operators is ensured.
Smart Images
Figure CN223123805U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a knife switch, in particular to a double-knife head knife switch with self-locking function. Background Art
[0002] Electrical equipment is divided into three states: running, standby (cold standby and hot standby), and maintenance. The process of changing the state of the equipment from one state to another is called a knife switch, and the operation performed is called a knife switch operation. Knife switch operation is one of the important tasks of electrical duty personnel. In traditional products, there is a lack of self-locking and safety protection, and the structure is too simple. Content of the Utility Model
[0003] In view of the existing technical deficiencies, the utility model provides a double-knife head knife switch with self-locking function.
[0004] In order to achieve the above object, the technical solution adopted by the utility model is as follows: A double-knife head knife switch with self-locking function, comprising a housing and a knife switch. The housing is internally provided with externally terminals and internally terminals that are symmetrically distributed in position. An integrally connected connecting portion is provided outside the housing. The connecting portion is hingedly connected to the knife switch. The housing is further provided with a self-locking member that elastically abuts against the rotation of the knife switch. The knife switch is provided with two blade pieces on the inner side for inserting the externally terminals. The blade pieces are arranged collinearly, and the knife switch is provided with an integrally connected turning head on the outer side. The turning head has a bridging portion directly connected to the knife switch, and the turning head is further provided with a torsion portion on the outer side surface of the bridging portion.
[0005] The self-locking member includes two swing arms and a connecting rod fixedly connecting the swing arms. The connecting rod passes through the swing arms and is movably assembled with the housing. A torsion spring is sleeved on the connecting rod, and the swing arms are driven by the torsion spring to elastically abut against the knife switch.
[0006] The knife switch has a corner portion at the position corresponding to the connecting portion. The corner portion has a limiting plane at an included angle, and the limiting plane abuts against the swing arm.
[0007] The bridging portion is in an arched shape, and the inner side surface of the bridging portion faces the knife switch.
[0008] The torsion portion is in a structure of a reverse-folded curve, and anti-slip lines corresponding to the human hand are provided on the inner and outer side surfaces of the torsion portion.
[0009] An inner rib is provided between the inner side wall of the bridging portion and the knife switch, and an outer rib is provided on the opposite surface of the reverse fold of the torsion portion.
[0010] The knife switch is provided with a T-shaped groove for inserting and installing the blade pieces. The projection of the blade piece in the length direction is in an L-shaped shape, and the blade pieces are integrally connected.
[0011] The turning head is provided with a splicing hole for shaft connection.
[0012] The housing comprises a front housing and a rear housing for plugging and limiting, and the front housing and the rear housing are provided with corresponding fixing grooves for installing the terminals.
[0013] The shell surface is provided with an outer notch corresponding to the position of the outer terminal and an inner notch corresponding to the inner terminal, and the direction of the outer notch is perpendicular to the direction of the inner notch.
[0014] The beneficial effects of the utility model: the self-locking double-blade knife switch provided by the utility model adopts co-linear gate pieces for simultaneous operation, which reduces safety hazards and facilitates wiring and use. The self-locking structure is also designed to ensure the stability of opening or closing the switch and avoid reset jumping, which greatly protects the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the planar structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the top view structure of the utility model;
[0017] Figure 3 It is a partial enlarged structural schematic diagram of the utility model;
[0018] Figure 4 It is a schematic diagram of the structure of the utility model when viewed from above. DETAILED DESCRIPTION
[0019] like Figures 1-4 As shown, a knife switch 2 with a self-locking double blade head includes a housing 1 and the knife switch 2. The housing 1 is provided with an external terminal 3 and an internal terminal 4 that are symmetrically distributed. There are two external terminals 3 and two internal terminals 4, which can be interchanged for positive and negative wiring to facilitate operation. The internal terminal 4 and the external terminal 3 are electrically connected by abutment, and other connection methods can also be adopted, which will not be elaborated or limited in detail here. The design of the internal terminal 4, the external terminal 3 and the double gate 7 is conducive to a more stable circuit layout, and has higher safety than a single node on and off. An integrally connected connecting portion 5 is provided on the outside of the housing 1, and the connecting portion 5 is hingedly connected to the knife switch 2. The hinged connection is a common connection method, which can be a movable fit between a cylinder and a circular hole, which will not be limited here. The housing 1 is also provided with a self-locking member 6 that elastically abuts against the knife switch 2 for rotation. The knife switch 2 is provided with two gate pieces 7 on the inner side that are plugged into the external terminals 3. The gate pieces 7 are arranged in a collinear manner, and the knife switch 2 is provided with an integrally connected breaking head 8 on the outer side. The breaking head 8 has a bridge portion 9 that is directly connected to the knife switch 2, and the breaking head 8 is provided with a torsion portion 10 on the outer side of the bridge portion 9. The collinear arrangement of the gate pieces 7 lengthens the relative creepage distance, further improving the safety of use. The self-locking member 6 keeps the knife switch 2 in a closed or open state through elastic abutment, and the breaking head 8 increases the operating distance of the personnel's hands, while facilitating the personnel to grasp and rotate.
[0020] The double blade self-locking device can lock the blade structure during maintenance to prevent it from falling and causing hidden dangers such as unsafe electricity use when wiring is in and out from the top or in and out from the bottom.
[0021] The self-locking member 6 includes two swing arms 11 and a connecting rod 12 fixedly connected to the swing arms 11, the connecting rod 12 passes through the swing arms 11 and is movably assembled with the housing 1, and a torsion spring 13 is sleeved on the connecting rod 12, and the swing arms 11 are driven by the torsion spring 13 to elastically abut against the knife gate 2. The self-locking member 6 is simple to use and easy to produce and process, and the torsion spring 13 drives the self-locking member 6 to abut against the knife gate 2.
[0022] The knife switch 2 has a corner portion 14 at the position corresponding to the connecting portion 5, and the corner portion 14 has a limiting plane 15 at an angle, and the limiting plane 15 is in contact with the swing arm 11. The angle at the corner portion 14 can be a right angle, an acute angle, or an obtuse angle, as long as the limiting plane 15 and the swing arm 11 can be in full and stable contact.
[0023] The bridge portion 9 is in an arched shape, and the inner side of the bridge portion 9 faces the knife switch 2, and has good structural strength to meet the design and use requirements. The twisting portion 10 is in a reversed curved structure, and the inner and outer surfaces of the twisting portion 10 are provided with anti-slip grooves 16 corresponding to human hands. The shape of the twisting portion 10 is convenient for the human hand to grasp the switch with two fingers, and is also convenient for relatively elastic pressing to close the switch. Through the multi-layer hollow structure of the bridge portion 9 and the twisting portion 10, the resistance distance is greatly improved and insulation breakdown is prevented.
[0024] The bridge portion 9 is provided with connected inner ribs 17 between the inner side wall and the knife gate 2, and the twisting portion 10 is provided with connected outer ribs 18 on the opposite folded surface to improve the local structural strength. The knife gate 2 is provided with a T-shaped slot for the gate piece 7 to be inserted and installed. The projection of the gate piece 7 in the length direction is L-shaped, and the gate pieces 7 are connected to form an integral structure. The installation notch of the T-shaped slot is different from the plug-in direction, which is conducive to the stable assembly of the gate piece 7. The bending head 8 is provided with a splicing hole 19 for shaft connection, and multiple housings 1 and knife gates 2 can be connected in parallel, depending on the actual use.
[0025] The housing 1 includes a front housing 1 and a rear housing 1 for plugging and limiting. The front housing 1 and the rear housing 1 are provided with corresponding fixing grooves 21 for terminal installation, without other complex structural designs, and directly limit the space for adaptation. The surface of the housing 1 is provided with an outer notch 22 corresponding to the position of the outer terminal 3 and an inner notch 23 corresponding to the inner terminal 4. The outer notch 22 is perpendicular to the inner notch 23, which facilitates connection in different directions and reduces mutual interference.
[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. At the same time, the basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art of this industry should understand.
Claims
1. A self-locking double-blade knife switch, comprising a housing and a knife switch, characterized in that, The housing is provided with outer terminals and inner terminals that are symmetrically distributed in position. The outside of the housing is provided with a connection part integrally connected. The connection part is hingedly connected to the knife switch. The housing is also provided with a self-locking part that elastically abuts against the rotation of the knife switch. The knife switch is provided with two blade pieces on the inner side for inserting the outer terminals. The blade pieces are arranged collinearly, and the knife switch is provided with an integrally connected lever on the outer side. The lever has a bridging part directly connected to the knife switch, and the lever is further provided with a torsion part on the outer side surface of the bridging part.
2. The self-locking double-knife blade disconnecting switch according to claim 1, characterized in that, The self-locking part includes two swing arms and a connecting rod fixedly connecting the swing arms. The connecting rod passes through the swing arms and is movably assembled with the housing. A torsion spring is sleeved on the connecting rod, and the swing arms are driven by the torsion spring to elastically abut against the knife switch.
3. The self-locking double-knife blade switch according to claim 2, wherein The knife switch has a corner part at the position corresponding to the connection part, and the corner part has a limiting plane with an included angle. The limiting plane abuts against the swing arm.
4. A self-locking double-knife blade switch according to claim 1, characterized in that, The bridging part is in an arched shape, and the inner side surface of the bridging part faces the knife switch.
5. The self-locking double-knife blade switch according to claim 4, characterized in that, The torsion part is in a structure of a folded curve, and the inner and outer side surfaces of the torsion part are provided with anti-slip lines corresponding to the human hand.
6. The self-locking double-blade knife switch according to claim 4, wherein, The bridging part is provided with an inner rib connected between the inner side wall and the knife switch, and the torsion part is provided with an outer rib connected on the opposite surface of the fold.
7. The self-locking double-knife blade knife switch according to claim 1, wherein The knife switch is provided with a T-shaped groove for inserting and installing the blade pieces. The projection of the blade pieces in the length direction is in an L-shaped shape, and the blade pieces are connected into an integral structure.
8. The self-locking double-knife blade knife switch according to claim 1, wherein, The lever is provided with a splicing hole for shaft connection.
9. A self-locking double-knife blade disconnect switch according to claim 1, characterized in that, The housing includes a front housing and a rear housing for plug-in limiting. The front housing and the rear housing are further provided with fixing grooves corresponding to the installation of the terminals.
10. A self-locking double-knife blade disconnect switch according to claim 9, characterized in that, The housing surface is provided with an outer notch corresponding to the position of the outer terminal and an inner notch corresponding to the inner terminal. The orientation of the outer notch is perpendicular to the orientation of the inner notch.