CN113972087A - Touch knife assembly and isolating switch - Google Patents
Touch knife assembly and isolating switch Download PDFInfo
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- CN113972087A CN113972087A CN202010722433.3A CN202010722433A CN113972087A CN 113972087 A CN113972087 A CN 113972087A CN 202010722433 A CN202010722433 A CN 202010722433A CN 113972087 A CN113972087 A CN 113972087A
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- contact
- knives
- force
- force application
- knife assembly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/12—Bases; Stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
- H01H21/50—Driving mechanisms with indexing or latching means, e.g. indexing by ball and spring; with means to ensure stopping at intermediate operative positions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
Abstract
The invention relates to a contact knife assembly and an isolating switch, wherein the contact knife assembly comprises two contact knives, an elastic clamping structure and a pushing mechanism, the two contact knives are oppositely arranged at intervals along the thickness direction to form a contact space between the two contact knives, the elastic clamping mechanism provides an elastic force for the two contact knives to approach each other, the elastic clamping mechanism is used for ensuring that the two contact knives clamp an adaptive contact in the contact space when switching on, and the pushing mechanism can overcome the elastic force of the elastic clamping structure between the two contact knives to outwards push and support the two contact knives and is used for enabling the adaptive contact to be spaced from the two contact knives when the adaptive contact is positioned in the contact space. The contact assembly can open the two contact knives through the pushing mechanism when the switching-on and switching-off operation is carried out, the adaptive contact does not contact with the contact knives when entering or separating from a contact space between the two contact knives, and the switching-on and switching-off operation is easy and labor-saving.
Description
Technical Field
The invention relates to a touch knife assembly and an isolating switch.
Background
The isolating switch is a switch electric switch for ensuring the work safety in a high-voltage electric device, and by operating the isolating switch, a part of electric equipment can be put into use or stopped to operate according to the operation requirement of a power grid, and the fault equipment can be quickly disconnected from the power grid when a fault occurs, so that the normal operation and the electricity utilization safety of the equipment in the power grid are ensured. Disconnectors have a very important role in power systems.
In the prior art, an isolating switch generally implements switching on and off operations through a contact and a contact knife in a direct contact manner, as shown in fig. 1, a current contact knife assembly for implementing switching on and off operations of an isolating switch includes two contact knives 11, a spring 14, a bolt 13 and a bushing 15, the two contact knives 11 are provided with the two contact knives 11, the bolt 13 sequentially penetrates through the two contact knives 11, the spring 14 is respectively provided on the bolt 13 at the outer sides of the two contact knives 11, the bushing 15 is further provided between the two contact knives 11, and the bushing 15 is used for supporting the two contact knives 11 so that a certain interval is provided between the two contact knives 11. One end of the contact knife 11 is a fixed end and is hinged on a contact knife seat of the isolating switch; the other end is a movable end which can rotate around a hinged shaft at the hinged position, and the movable end can be used for being in contact fit with the contact 12. When switching-on operation is carried out, the movable ends of the two contact knives 11 rotate to the position of the contact 12, the contact 12 is clamped between the two contact knives 11 by directly overcoming the friction force, the contact 12 is pressed by the two contact knives 11 under the pressing action of the spring 14, and the movable ends of the contact knives 11 are rotated out by directly overcoming the friction force during switching-off, so that the contact knives 11 are separated from the contact 12. However, the method is not suitable for a high-current isolating switch, the contact area between a contact and a contact knife in the high-current isolating switch is increased, the pressing force of a spring on the two contact knives is large, the operation needs to be performed by overcoming large friction force during switching on and switching off, the operating force is large, the switching on and switching off operation of the isolating switch is difficult, and the potential safety hazard during the switching on and switching off process of the isolating switch is increased.
Disclosure of Invention
The invention aims to provide a touch knife assembly which can solve the technical problems that the operation is labor-consuming and the switching-on and switching-off are difficult when the existing touch knife assembly is used in a high-current isolating switch;
in addition, the invention also aims to provide the isolating switch, which can solve the technical problems of labor-consuming operation and difficult switching-on and switching-off in the switching-on and switching-off process of the existing high-current isolating switch.
The contact knife component adopts the following technical scheme:
a touch knife assembly comprising:
the two contact knives are oppositely arranged at intervals along the thickness direction, and a contact space for accommodating the adaptive contact is formed between the two contact knives;
the elastic clamping structure provides an elastic force for the two contact knives to approach each other, and is used for ensuring that the two contact knives clamp the adaptive contact in the contact space during switching on;
and the pushing mechanism can overcome the elastic force of the elastic clamping structure between the two contact knives to outwards push and support the two contact knives so as to enable the adaptive contact to be spaced from the two contact knives when the adaptive contact is positioned in the contact space.
Has the advantages that: in the contact knife assembly, the pushing mechanism can overcome the elastic force to open the two contact knives, so that the adaptive contact and the two contact knives are spaced and do not contact with each other in the switching-on and switching-off operation process, the large friction force does not need to be overcome as the conventional contact knife assembly is used for switching-on and switching-off, the operation is easy and labor-saving, the switching-on and switching-off can be conveniently completed, and the technical problems that the conventional contact knife assembly is labor-consuming in operation and difficult in switching-on and switching-off in a large-current isolating switch can be solved.
Further, the pushing mechanism comprises two groups of pushing members and a force application member, the two groups of pushing members are arranged corresponding to the two contact knives respectively, the force application member moves between the two groups of pushing members, and the two groups of pushing members can be opened along with the movement of the force application member so as to push and support the two contact knives.
Has the advantages that: the movable fit structure of the jacking piece and the force application piece jacks the two-touch blade, on one hand, the fit structure is reliable and durable, on the other hand, the operation response speed is favorably improved, and the rapid completion of the opening and closing process is favorably realized.
Furthermore, the force application part reciprocates along a straight line, and the motion direction of the force application part is vertical to the thickness direction of the contact knife.
Has the advantages that: when the force application member does linear reciprocating motion, the occupied space is small, so that the pushing mechanism has a compact structure.
Furthermore, the top support part comprises a dowel bar and a rolling part positioned at the end of the dowel bar, a groove is formed in the force application part to form a concave-convex matching surface, and when the force application part reciprocates, the rolling part rolls along the concave-convex matching surface and can prop open the two contact knives through the dowel bar.
Has the advantages that: on the basis that the rolling member and the force application member are made of unchanged materials, the rolling member is matched with the force application member in a rolling mode to reduce friction force between the rolling member and the force application member, then the friction force which needs to be overcome by movement of the force application rod is reduced, force is conveniently applied to the force application rod, and opening and closing operations are easier.
Furthermore, the jacking pieces are fixedly connected to the inner side of the contact knife, the pushing mechanism further comprises a pivoting block, a jacking channel and a force application channel which is perpendicular to the jacking channel are arranged in the pivoting block, the two groups of jacking pieces are respectively and slidably mounted in the jacking channel, and the force application pieces are in guiding and direct-moving fit with the pivoting block in the force application channel.
Has the advantages that: the pivoting block can be used for limiting the movement path of the top support piece and the force application piece, and is favorable for force transmission fit between the force application piece and the top support piece.
Furthermore, the force application part is of a rod body structure, and the groove is an annular groove formed in the surface of the rod body structure.
Has the advantages that: when the force application part is of the structure, the movement mode of the force application part in the force application channel is more flexible, the force application part and the rolling part are in contact fit, and the force application part can apply force to the rolling part conveniently.
Furthermore, the size of the pivoting block in the thickness direction of the contact knives is smaller than the size of the distance between the two contact knives when the two contact knives are used for clamping the adaptive contact, and the difference between the two sizes is not larger than 1 mm.
Has the advantages that: on one hand, the pin joint block does not influence the two contact knives to compress the adaptive contact when closing operation is ensured, on the other hand, the size of the pin joint block in the thickness direction of the contact knives is slightly smaller than the distance size of the two contact knives when the adaptive contact is clamped, the movement stroke of the jacking piece is smaller when the jacking mechanism jacks the two contact knives outwards, correspondingly, the direct-acting stroke of the force application rod required for propping the two contact knives is smaller, the operation speed of the force application rod is favorably accelerated, and the opening and closing speed is improved.
Furthermore, two ends of the force application member along the movement direction are respectively provided with a limit structure which is used for being matched with the pivot block in a stop way to limit the movement of the force application member.
Has the advantages that: the motion stroke of the force application part is limited, the connection with the force application part through an external operating mechanism is convenient, and the operation of the force application part in place is ensured.
The isolating switch adopts the following technical scheme:
an isolator switch, comprising:
a contact seat and a contact cutter seat;
the contact is fixedly arranged on the contact seat;
the contact knife assembly is movably assembled on the contact knife seat;
a touch knife assembly comprising:
the two contact knives are oppositely arranged at intervals along the thickness direction, and a contact space for accommodating the adaptive contact is formed between the two contact knives;
the elastic clamping structure provides an elastic force for the two contact knives to approach each other, and is used for ensuring that the two contact knives clamp the adaptive contact in the contact space during switching on;
and the pushing mechanism can overcome the elastic force of the elastic clamping structure between the two contact knives to outwards push and support the two contact knives so as to enable the adaptive contact to be spaced from the two contact knives when the adaptive contact is positioned in the contact space.
Has the advantages that: according to the contact knife assembly used by the isolating switch, the pushing mechanism can overcome the elastic force to open the two contact knives, so that the adaptive contact and the two contact knives are spaced and do not contact with each other during switching-on and switching-off operation, larger friction force does not need to be overcome as the traditional contact knife assembly is used for switching-on and switching-off, the operation is easier and more labor-saving, switching-on and switching-off are conveniently completed, and the technical problems that the traditional contact knife assembly is labor-consuming in operation and difficult in switching-on and switching-off when used in a large-current isolating switch can be solved.
Further, the pushing mechanism comprises two groups of pushing members and a force application member, the two groups of pushing members are arranged corresponding to the two contact knives respectively, the force application member moves between the two groups of pushing members, and the two groups of pushing members can be opened along with the movement of the force application member so as to push and support the two contact knives.
Has the advantages that: the movable fit structure of the jacking piece and the force application piece jacks the two-touch blade, on one hand, the fit structure is reliable and durable, on the other hand, the operation response speed is favorably improved, and the rapid completion of the opening and closing process is favorably realized.
Furthermore, the force application part reciprocates along a straight line, and the motion direction of the force application part is vertical to the thickness direction of the contact knife.
Has the advantages that: when the force application member does linear reciprocating motion, the occupied space is small, so that the pushing mechanism has a compact structure.
Furthermore, the top support part comprises a dowel bar and a rolling part positioned at the end of the dowel bar, a groove is formed in the force application part to form a concave-convex matching surface, and when the force application part reciprocates, the rolling part rolls along the concave-convex matching surface and can prop open the two contact knives through the dowel bar.
Has the advantages that: on the basis that the rolling member and the force application member are made of unchanged materials, the rolling member is matched with the force application member in a rolling mode to reduce friction force between the rolling member and the force application member, then the friction force which needs to be overcome by movement of the force application rod is reduced, force is conveniently applied to the force application rod, and opening and closing operations are easier.
Furthermore, the jacking pieces are fixedly connected to the inner side of the contact knife, the pushing mechanism further comprises a pivoting block, a jacking channel and a force application channel which is perpendicular to the jacking channel are arranged in the pivoting block, the two groups of jacking pieces are respectively and slidably mounted in the jacking channel, and the force application pieces are in guiding and direct-moving fit with the pivoting block in the force application channel.
Has the advantages that: the pivoting block can be used for limiting the movement path of the top support piece and the force application piece, and is favorable for force transmission fit between the force application piece and the top support piece.
Furthermore, the force application part is of a rod body structure, and the groove is an annular groove formed in the surface of the rod body structure.
Has the advantages that: when the force application part is of the structure, the movement mode of the force application part in the force application channel is more flexible, the force application part and the rolling part are in contact fit, and the force application part can apply force to the rolling part conveniently.
Furthermore, the size of the pivoting block in the thickness direction of the contact knives is smaller than the size of the distance between the two contact knives when the two contact knives are used for clamping the adaptive contact, and the difference between the two sizes is not larger than 1 mm.
Has the advantages that: on one hand, the pin joint block does not influence the two contact knives to compress the adaptive contact when closing operation is ensured, on the other hand, the size of the pin joint block in the thickness direction of the contact knives is slightly smaller than the distance size of the two contact knives when the adaptive contact is clamped, the movement stroke of the jacking piece is smaller when the jacking mechanism jacks the two contact knives outwards, correspondingly, the direct-acting stroke of the force application rod required for propping the two contact knives is smaller, the operation speed of the force application rod is favorably accelerated, and the opening and closing speed is improved.
Furthermore, two ends of the force application member along the movement direction are respectively provided with a limit structure which is used for being matched with the pivot block in a stop way to limit the movement of the force application member.
Has the advantages that: the motion stroke of the force application part is limited, the connection with the force application part through an external operating mechanism is convenient, and the operation of the force application part in place is ensured.
Drawings
FIG. 1 is a schematic diagram of a portion of a prior art contact blade assembly;
FIG. 2 is a schematic diagram of the structural cooperation with the contact when two movable ends are propped open in embodiment 1 of the contact knife assembly of the present invention;
FIG. 3 is a schematic diagram of the structure of the contact knife assembly of embodiment 1 of the present invention when two movable ends clamp the contacts;
FIG. 4 is a partial schematic view showing the direction of movement of the tie bar in exemplary embodiment 1 of the touch knife assembly of the present invention;
in the figure: 1-a movable end; 2-a contact; 3-a pull rod; 31-a ring groove; 32-a limit pin; 33-a stopper; 4-rolling a ball; 5-a pin shaft; 6-screw rod; 7-a spring; 8-a pivot joint block; 11-touch knife; 12-a contact; 13-a bolt; 14-a spring; 15-lining.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
the contact knife assembly of the invention, as shown in fig. 2-4, comprises two contact knives which are arranged at intervals in the thickness direction, one end of each contact knife is a fixed end and is hinged on a contact knife seat, the other end of each contact knife is a movable end and can rotate around a hinge axis at the contact knife seat, and the interval between the two contact knives forms a contact space for accommodating a contact 2. The two contact knives are connected through a screw 6 and a nut so that the two contact knives can synchronously rotate. When the switching-on and switching-off operation is carried out, the movable end 1 needs to be rotated around the hinge axis so that the contact 2 enters or leaves a contact space between the two movable ends.
For two contact knives can compress tightly contact 2 that is located the contact space when making the combined floodgate state, be equipped with elasticity clamping mechanism in touching the sword subassembly, elasticity clamping mechanism comprises spring 7, two contact knives are worn out through touching the round hole on the sword to screw rod 6, spring 7 wears to adorn on the portion of wearing out that two contact knives outside of screw rod 6, still install the nut on the portion of wearing out of screw rod 6, spring 7 is compressed to be installed at the nut and touches between the sword for provide the elastic force towards two free ends 1 inboards to two free ends 1. When the contact 2 is positioned in the contact space in the switching-on process, the two movable ends 1 approach each other under the action of the elastic force of the spring 7 to clamp the contact 2.
In order to achieve the purpose of opening and closing the brake easily and in a labor-saving manner, the contact knife assembly enables the two movable ends 1 to keep a certain interval from being contacted with the contact 2 when the two movable ends 1 are screwed in and out of the positions of the contacts, and the contact knife does not need to overcome larger friction force like the traditional contact knife assembly when being operated. In order to achieve the technical effect, the touch knife assembly comprises a pushing mechanism, wherein the pushing mechanism comprises a pivot joint block 8, a rolling ball 4, a pin shaft 5 and a pull rod 3. The pivot block 8 is provided with a top bracing channel and a force applying channel which are formed by through holes. The top support channel extends along the thickness direction of the contact cutter, and the force application channel and the top support channel are crossed and vertically arranged. The pin shaft 5 and the rolling balls 4 which are matched and arranged at the end part of the pin shaft 5 form a group of shoring pieces, and the two groups of shoring pieces are respectively arranged in the shoring channels at the two sides of the force application channel.
The pull rod 3 is arranged in the force application channel in a guiding and straight-moving way, and is provided with a ring groove 31, and a concave-convex matching surface for matching with the top support piece is formed on the surface of the ring groove. In the linear motion of the pull rod 3, the top support piece is matched with the concave-convex matching surface, can slide to the outer side of the top support channel and further expand the distance between the two movable ends 1, specifically, the rolling ball 4 is in rolling fit with the pull rod 3, the rolling ball 4 rolls along the concave-convex matching surface under the direct motion action of the connecting rod, and the two states of being separated from the annular groove 31 and being positioned in the annular groove 31 are achieved. The pin shaft 5 is a step shaft and comprises a large-diameter section and a small-diameter section, a connecting hole is formed in the movable end, the small-diameter section extends into the connecting hole, the pin shaft 5 is fixedly connected to the inner side of the contact cutter, and the annular step surface on the pin shaft 5 is used for jacking the movable end when the jacking piece slides to the outer side of the jacking channel. When the rolling ball 4 rolls along the concave-convex matching surface, the rolling ball can roll outwards under the action of the pull rod 3, and applies force to the pin shaft 5 so as to enable the pin shaft 5 to prop and support the two movable ends outwards through the annular step surface, thereby achieving the purpose of expanding the distance between the two movable ends. In this embodiment, the rolling ball 4 constitutes a rolling member, the pin 5 constitutes a force transmitting member, and the pull rod 3 constitutes a force applying member for applying force to the supporting member.
In this embodiment, the dimension of the pivot block 8 in the thickness direction of the contact blade is slightly smaller than the distance between the two movable ends for clamping the contact when the contact is closed, that is, the difference between the two dimensions is not greater than 1 mm. So set up the pin joint piece size, both can avoid the pin joint piece to influence when the combined floodgate and touch the sword and press from both sides tight contact, can reduce the motion stroke of piece of shoring again, be favorable to reducing the straight-moving stroke of strutting the required application of force pole of two touch-sensitive sword, conveniently improve application of force pole operating speed and divide-shut brake speed.
In the contact knife assembly of the invention, as shown in fig. 4, the extending direction of the force application channel and the extending direction of the contact knife form a certain angle, namely the sliding direction of the pull rod 3 and the extending direction of the contact knife form a certain angle, and the arrangement can avoid the interference of the pull rod 3 and the structure between the two contact knives in the pushing and pulling process, so that the operation space of the pull rod 3 is larger. In addition, the pull rod 3 is provided with a limiting structure, which comprises an upward limiting structure and a downward limiting structure, and is used for limiting the linear motion stroke of the pull rod 33 and ensuring that the pull rod 33 is always positioned in the limited linear motion stroke, the upward limiting structure is a limiting pin 32 positioned at the lower end of the pull rod 3 and can limit the end of the upward stroke of the pull rod 3, and when the pull rod 3 reaches the end of the upward stroke, the limiting pin 32 is in stop fit with one side of the pivot block 8; the downward limiting structure is a stop 33 positioned on the pull rod 4 and used for limiting the downward stroke end of the pull rod 3, and the stop 33 is in stop fit with the other side of the pivot block 8 when the pull rod 3 reaches the downward stroke end. When the pull rod is at the end of its upward or downward stroke, the ball 4 is in the groove 31 or out of the groove 31.
When the contact knife assembly is matched with a contact to carry out switching-on and switching-off operations, the directions shown in figures 2-4 are taken as references, when in switching-on operations, before the movable end is rotated, the pull rod is pushed downwards until a stop block on the pull rod is in stop fit with a pivot block, the pull rod moves to the tail end of a descending stroke, the pull rod props open a rolling ball, the rolling ball rolls and then pushes a pin shaft, the two pin shafts respectively prop the two movable ends outwards, the distance between the two movable ends is increased, then the movable ends are rotated to enable the contact to enter a contact space, during the rotating operation, the contact always keeps a distance with the two movable ends in the thickness direction of the contact knife, then the pull rod is pulled upwards until a limit pin on the pull rod is in stop fit with the rolling ball, the pull rod moves to the tail end of the ascending stroke and rolls into a ring groove, under the elastic force of a spring, the pin shafts slide inwards, the two movable ends approach each other to press the contact, and keeping a closing state. During the opening operation, the pull rod needs to be pushed downwards again before the movable ends are rotated to enable the pull rod to move to the end of the descending stroke, a certain interval is kept between the two spread movable ends and the contact, and then the movable ends are unscrewed.
When the contact knife assembly is used, the pull rod needs to be operated before switching-on and switching-off operation each time, so that the two movable ends are spread, the two contact knives do not contact with the contact during rotation, the operation is labor-saving, and the rotation is very smooth. In the embodiment, the structure of the top supporting piece is further optimized, the rolling matching structure of the rolling balls and the pull rod is beneficial to reducing the friction force which needs to be overcome when the pull rod is operated, and the pull rod is convenient and labor-saving to operate. On the whole, the touch knife combined opening and closing operation is easy and convenient.
The contact knife assembly of the invention mainly solves the problem that the pushing mechanism is arranged at one end of the contact knife, which is used for being contacted with the contact, and the pushing mechanism supports the two contact knives to separate the contact from the contact knives, and is irrelevant to the motion form of the contact knife assembly, for example, in other embodiments, when the contact knife assembly directly moves to enable the contact to enter or separate from a contact space between the two contact knives, the purpose of labor saving of switching on and off can be realized by adopting the mode that the pushing mechanism supports the two contact knives.
Similarly, the structural form of the pushing mechanism is not limited to the form of pushing cooperation between the force application member and the supporting member in this embodiment, for example, in other embodiments, the pushing mechanism is an electromagnetic repulsion mechanism disposed between the two movable ends, the electromagnetic repulsion mechanism includes two electrified coils, the two electrified coils are respectively fixed at the inner sides of the two movable ends, and the ends of the two electrified coils with the same polarity are oppositely disposed, so that the two movable ends can be separated from each other by repulsion of the two electrified coils after the two electrified coils are electrified.
Other embodiments of the invention are also provided below:
different from the embodiment 1, the elastic clamping mechanism is a tension spring, the tension spring is sleeved on the middle part of the screw rod between the two contact knives, two ends of the tension spring are respectively fixedly connected with the two movable ends, and elastic force which faces the inner parts of the two movable ends and enables the two movable ends to approach each other can be provided for the two movable ends, so that the two movable ends clamp the contact when in a closing state.
different from the embodiment 1, the force transmission piece is of a cylindrical structure, the end face of the force transmission piece, facing the outside of the jacking channel, can be used for pushing the movable end, and the force transmission piece only plays a role in force transmission and pushing and is not connected with the contact knife. The two surfaces of the pin joint block facing the inner side of the contact knife are provided with convex blocks, the two movable ends are correspondingly provided with openings used for being matched with the convex blocks, and the convex blocks penetrate through the contact knife through the openings. Through the arrangement of the lug and the opening, the pivoting block and the two movable ends can synchronously rotate together.
different from the embodiment 1, the rolling part is a roller assembled at one end of the pin shaft in a rolling way, and the rolling axis direction of the roller is vertical to the motion direction of the pull rod, so that the roller can roll along the concave-convex matching surface when the pull rod moves straightly.
the difference from the embodiment 1 is that the cross section of the force application part is quadrilateral, the force application channel is composed of a square hole, grooves are only arranged on two side surfaces of the force application part, which are in fit contact with the rolling balls, and the grooves are V-shaped grooves.
different from the embodiment 1, the top support channel and the force application channel are two closing grooves which are arranged on the surface of the pivot joint block and are mutually crossed and vertical, the two closing grooves are respectively a first closing groove and a second closing groove, the top support piece is in sliding fit with the first closing groove, and the pull rod is positioned in the second closing groove and is in guiding and direct-acting fit with the inner wall of the second closing groove.
Specific example 7 of the touch knife assembly of the present invention:
different from embodiment 1, the force application member goes in and out between two groups of top supporting members in a swinging motion mode, and supports the two groups of top supporting members, and the specific structure is as follows: the pushing mechanism comprises a fixed seat, a force application rod and a pair of balls which are respectively fixedly arranged on the inner sides of the two movable ends, the two balls are arranged oppositely, the fixed seat is fixedly arranged on a screw rod between the two contact knives, the force application rod is rotatably assembled on the fixed seat, one end of the force application rod can be rotated into or out of the two balls through rotating the force application rod, and the force application rod can prop the two balls open when being rotated into the two balls so as to prop the two movable ends outwards.
different from the embodiment 1, the rolling ball is fixedly connected with the pin shaft to form a top support piece.
The specific embodiment of the isolating switch comprises a contact seat, a contact tool seat, a contact and a contact tool assembly, wherein the contact tool assembly is movably assembled on the contact tool seat, and the contact is fixedly arranged on the contact seat. The contact knife assembly in this embodiment has the same structure as the contact knife assembly in any one of the specific embodiments of the contact knife assembly of the present invention, and the details are not described here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (9)
1. A contact knife assembly comprising:
the two contact knives are oppositely arranged at intervals along the thickness direction, and a contact space for accommodating the adaptive contact is formed between the two contact knives;
the elastic clamping structure provides an elastic force for the two contact knives to approach each other, and is used for ensuring that the two contact knives clamp the adaptive contact in the contact space during switching on;
characterized by, touch the sword subassembly and still include:
and the pushing mechanism can overcome the elastic force of the elastic clamping structure between the two contact knives to outwards push and support the two contact knives so as to enable the adaptive contact to be spaced from the two contact knives when the adaptive contact is positioned in the contact space.
2. The contact knife assembly of claim 1, wherein the pushing mechanism includes two sets of the top support members and a force applying member, the two sets of the top support members are disposed corresponding to the two contact knives, the force applying member is movable between the two sets of the top support members, and the two sets of the top support members can be opened by the movement of the force applying member to support the two contact knives.
3. The touch blade assembly of claim 2, wherein the force applying member reciprocates in a straight line, the force applying member moving in a direction perpendicular to the thickness direction of the touch blade.
4. The contact blade assembly of claim 3 wherein the top support member includes a dowel and a roller at the end of the dowel, the force applying member having a groove defining a concave-convex mating surface, the roller rolling along the concave-convex mating surface and being operable to spread the contact blades apart by the dowel as the force applying member reciprocates.
5. The touch knife assembly of claim 3, wherein the top support members are fixedly connected to the inner side of the touch knife, the pushing mechanism further comprises a pivot block, the pivot block is provided with a top support channel and a force application channel perpendicular to the top support channel, the two groups of top support members are slidably mounted in the top support channels, respectively, and the force application member is in guiding and direct-moving fit with the pivot block in the force application channel.
6. The touch blade assembly of claim 5, wherein the force applying member is a rod structure and the recess is an annular groove formed in a surface of the rod structure.
7. The contact blade assembly of claim 5, wherein the dimension of the pivot block in the thickness direction of the contact blades is less than the dimension of the spacing between the contact blades when the contact blades are used to clamp the mating contact, the difference between the two dimensions being no greater than 1 mm.
8. The touch knife assembly of any one of claims 5-7, wherein the force applying member has a limiting structure at each end along the moving direction for stop-engaging with the pivot block to limit the movement of the force applying member.
9. A disconnector, comprising:
a contact seat and a contact cutter seat;
the contact is fixedly arranged on the contact seat;
the contact knife assembly is movably assembled on the contact knife seat;
the contact knife assembly is characterized in that the contact knife assembly is as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722433.3A CN113972087A (en) | 2020-07-24 | 2020-07-24 | Touch knife assembly and isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722433.3A CN113972087A (en) | 2020-07-24 | 2020-07-24 | Touch knife assembly and isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113972087A true CN113972087A (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010722433.3A Pending CN113972087A (en) | 2020-07-24 | 2020-07-24 | Touch knife assembly and isolating switch |
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| Country | Link |
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| CN (1) | CN113972087A (en) |
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| CN2857192Y (en) * | 2005-12-22 | 2007-01-10 | 仪征市电瓷电器有限责任公司 | Switching and locking means of indoor high voltage disconnecting switch |
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| CN2857192Y (en) * | 2005-12-22 | 2007-01-10 | 仪征市电瓷电器有限责任公司 | Switching and locking means of indoor high voltage disconnecting switch |
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| CN101290845A (en) * | 2008-06-10 | 2008-10-22 | 宁波天安（集团）股份有限公司 | Fasten type high-voltage isolation switch |
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