Switching device for a point machine

Abstract

The application discloses a kind of switching device and switch machine for switch machine, including square main frame, static contact point assembly and movable contact point assembly;The static contact point assembly has N and is installed in square main frame top;The movable contact point assembly includes shaft (14) and N movable contact point (5), one end of the shaft (14) is connected with the arm (15), and the installation roller (1) of the arm (15);Touch roller (1) drives the arm (15) swing, shaft (14) rotates, movable contact point (5) rotates with shaft (14), and movable contact ring (51) reaches target position;Disconnect roller (1), reset torsional spring (12) reset, drive shaft (14) back rotation movable contact ring (51) return to initial position, applied to switch machine, movable and static contact head cooperation surface uses end face contact, and signal output is more reliable;Action mechanism design is simple, without intermediate transmission mechanism, reduce failure point, improve product safety, easy to maintain.

Description

Technical Field

[0001] This invention belongs to the field of mechanical structure technology, and particularly relates to the field of railway mechanical equipment technology, specifically to a switch device for a switch machine. Background Technology

[0002] Electric switch machines are used in railway turnout switching equipment. The function of electric switch machines is to switch and lock the switch rail / spot rail, change the opening direction of the turnout, and reflect the position status of the switch rail / spot rail through the contact points.

[0003] As an important signaling infrastructure in railway turnout switching equipment, the switch machine can drive the turnout to switch and lock, ensuring the safety of railway train operation. The contact part is the key equipment for transmitting status signals between the internal and external interlocking equipment of the switch machine. It accurately indicates the position status of the turnout. This position status signal serves as the basis for train dispatching and plays a very important role in ensuring train operation safety and improving transportation efficiency.

[0004] Electric switch machines require switching devices to control their specific actions during operation. Existing switching devices, such as... Figures 1 to 5 As shown, the switchgear internally employs a ribbed contact system, mainly composed of one set of moving contact mechanisms 200 and two sets of stationary contact mechanisms 100. For example... Figure 1 and Figure 2 As shown, the main structure of the stationary contact mechanism 100 consists of a stationary contact fixing block 101, a stationary contact spring piece 102, and a reinforcing piece 103. The stationary contact spring piece 102 and the reinforcing piece 103 are fixed to the stationary contact fixing block 101 by bolts. Figure 3 The main structure of the moving contact mechanism 200 shown consists of a moving contact fixing block 201, a moving contact ring 202, and a retaining ring 203. The moving contact ring 202 passes through the cylindrical boss of the moving contact fixing block 201 and is limited by the retaining ring 203. Both the moving contact ring 202 and the stationary contact spring 102 are made of copper-based material.

[0005] like Figure 4 and 5 As shown, the working principle of the rib-type contact is as follows: the moving contact mechanism 200 is fixedly installed on the movable part of the switch machine, and two sets of stationary contact mechanisms 100 are symmetrically fixedly installed on the switch machine parts on both sides of the moving contact. The movable part can rotate around an axis to both sides at a fixed angle, and then the moving contact ring 202 of the moving contact mechanism 200 can be inserted into the stationary contact spring 102 of the stationary contact mechanism 100, or disengaged from the stationary contact spring 102, thereby connecting or disconnecting the contact.

[0006] The disadvantages of this existing technical solution are that the static contact spring 102 of the ribbed contact is in the form of a spring, and the contact pressure comes from the spring. Although too low a contact pressure can increase the service life, it is easy to cause the contact to break during vibration, resulting in signal loss. Although too high a contact pressure can ensure reliable connection during vibration, it increases wear and is prone to contact plate breakage, affecting the service life. At the same time, the ribbed contact will generate too much metal dust after long-term use, requiring regular cleaning; in addition, dust scattered around the contact will reduce the insulation performance in a high humidity environment. Summary of the Invention

[0007] The purpose of this invention is to provide a switch device for a switch machine. The device is applied to a switch machine, and both the moving and stationary contact surfaces adopt end face contact, which makes the signal output more reliable. The actuating mechanism is designed to be simple, without intermediate transmission mechanism, reducing failure points, improving product safety, and facilitating maintenance.

[0008] The technical solution provided by this invention is as follows:

[0009] A switch device for a switch machine includes a square main frame, a stationary contact assembly, and a moving contact assembly;

[0010] There are N static contact components, N≧3; they are installed side by side at the top of the square main frame; the static contact components include two pairs of left and right symmetrical static contacts 4, and the two contact arc surfaces 41 of one pair of static contacts 4 on one side are V-shaped with the opening facing downward.

[0011] The moving contact assembly includes a rotating shaft 14 and N moving contacts 5. The rotating shaft 14 is installed below the bottom static contact assembly inside the square main frame. The N moving contacts 5 are fixed side by side on the rotating shaft 14. The contact surface of the moving contact ring 51 of the moving contact 5 is conical.

[0012] One end of the rotating shaft 14 extends out of the square main frame and is fixedly connected to the inner end of the actuating arm 15. A roller 1 is installed on the outer end of the actuating arm 15. Furthermore, a rotating shaft return torsion spring 12 is installed on the extended end shaft section of the rotating shaft 14.

[0013] The trigger roller 1 drives the toggle arm 15 to swing, which in turn drives the rotating shaft 14 to rotate. At the same time, the rotating shaft reset torsion spring 12 is pressed. The moving contact 5 rotates with the rotating shaft 14. The contact surface of the moving contact ring 51 of the moving contact 5 disengages from the two contact arc surfaces 41 of the pair of stationary contacts 4 on the initial position side. It continues to rotate to the target position side, and the contact surface of the moving contact ring 51 of the moving contact 5 makes contact with the two contact arc surfaces 41 of the pair of stationary contacts 4 on the target position side. The moving contact ring 51 reaches the target position.

[0014] When roller 1 is disengaged, the shaft reset torsion spring 12 resets, driving the shaft 14 to rotate and reset; the moving contact 5 resets with the rotation of the shaft 14. As the contact 5 rotates with the shaft 14, the contact surface of the moving contact ring 51 of the moving contact 5 disengages from the two contact arc surfaces 41 of the pair of stationary contacts 4 on the target position side, and continues to rotate to the initial position side. The contact surface of the moving contact ring 51 of the moving contact 5 then contacts and engages with the two contact arc surfaces 41 of the pair of stationary contacts 4 on the initial position side, and the moving contact ring 51 returns to the initial position.

[0015] The square main frame is also provided with a limiting mechanism to limit the swing range of the toggle arm 15; limiting the swing of the moving contact ring 51 of the moving contact 5 between the initial position and the target position.

[0016] The moving contact 5 also includes a moving contact seat 52, a dust cover 7, a contact spring 6, and a fixing pin 53;

[0017] The movable contact seat 52 is mounted on the rotating shaft 14; a protrusion 54 is provided in the radial direction, and a movable contact ring 51, a contact spring 6 and a dust cover 7 are sequentially installed on the protrusion 54 in the radial direction by a fixing pin 53;

[0018] The moving contact ring 51 is loosely fitted onto the fixed pin 53, supported by the lower contact spring 6, and can float and rotate freely.

[0019] The moving contact seat 52 has a square hole in its center that mates with the square shaft segment of the rotating shaft 14 for installation.

[0020] The limiting mechanism includes a supporting limiting plate 13, which is fixed on the square main frame. The extended end of the rotating shaft 14 extends out of the supporting limiting plate 13 and is then connected to the toggle arm 15.

[0021] The support limiting plate 13 is provided with an arc-shaped limiting groove 131, and the outer end of the toggle arm 15 is provided with a pin 151 passing through the arc-shaped limiting groove 131, which swings within the arc-shaped limiting groove 131 to limit the swing range of the toggle arm 15.

[0022] The centers 411 of the two contact arc surfaces 41 of the pair of stationary contacts 4 are not concentric. The centers 411 of the stationary arcs are symmetrically arranged on both sides of the rotation axis 511 of the moving contact 5. The radius of the arc of the two contact arc surfaces 41 of the pair of stationary contacts 4 is greater than the distance from the contact point of the moving contact ring 51 of the moving contact 5 and the contact arc surface 41 to the rotation axis 511 of the moving contact 5.

[0023] The described stationary contact assembly includes an electrically insulating stationary contact base 42. The top of the stationary contact base 42 is provided with a glue-containing groove, and the bottom of the glue-containing groove has two stationary contact mounting through holes facing downwards. The stationary contact 4 is inserted into the stationary contact mounting through holes from below, and a lead wire 44 is welded to the top. An insulating sleeve 43 is fitted at the root of the lead wire 44. The glue-containing groove is filled with sealant 46, and the sealant 46 solidifies and connects and fixes the stationary contact 4 to the stationary contact base 42.

[0024] In the initial position, the roller 1 is mounted above or below the rotating shaft 14 via a toggle arm 15.

[0025] As can be seen from the technical solutions provided by the present invention above, the switch device for a switch machine provided by the embodiments of the present invention is applied to a switch machine. The mating surfaces of the moving and stationary contacts both adopt end face contact, which makes the signal output more reliable. The action mechanism is designed simply, without intermediate transmission mechanism, which reduces failure points, improves product safety, and facilitates maintenance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the main structure of the stationary contact mechanism of a switch device for a prior art switch machine;

[0028] Figure 2 A schematic diagram of the left cross-sectional structure of the stationary contact mechanism of a switch device for a prior art switch machine;

[0029] Figure 3 A schematic diagram of the moving contact mechanism of a switch device used in a conventional switch machine.

[0030] Figure 4 A schematic diagram of the connection state of the moving contact mechanism and the stationary contact mechanism of the switching device for a current switch machine in the prior art;

[0031] Figure 5 A schematic diagram of the structure of the moving contact mechanism and the stationary contact mechanism of the switching device for a current-technical switch machine in the disconnected state;

[0032] Figure 6 This is a schematic diagram of the structure of the switch device for a switch machine provided in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the main structure of the stationary contact assembly of the switch device for a switch machine provided in an embodiment of the present invention;

[0034] Figure 8This is a schematic diagram of the left structure of the stationary contact assembly of the switch device for a switch machine provided in an embodiment of the present invention;

[0035] Figure 9 A schematic diagram of the lead wire connection structure in the stationary contact assembly of the switch device for a switch machine provided in an embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the moving contact assembly structure of the switch device for a switch machine provided in an embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the moving contact structure of the switch device for a switch machine provided in an embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of the limiting mechanism structure of the switch device for a switch machine provided in an embodiment of the present invention;

[0039] Figure 13 A schematic diagram of the contact structure between the stationary and moving contacts of the switch device for a switch machine provided in an embodiment of the present invention. Figure 1 ;

[0040] Figure 14 A schematic diagram of the contact structure between the stationary and moving contacts of the switch device for a switch machine provided in an embodiment of the present invention. Figure 2 ;

[0041] Figure 15 A schematic diagram of the left-side structure of the switch device for a switch machine provided in an embodiment of the present invention. Figure 1 ;

[0042] Figure 16 A schematic diagram of the left-side structure of the switch device for a switch machine provided in an embodiment of the present invention. Figure 2 . Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0044] First, the following explanations are provided for the terms that may be used in this article:

[0045] The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0046] The terms "comprising," "including," "containing," "having," or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.) should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0047] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0048] The term "parts by mass" indicates the mass ratio between multiple components. For example, if component X is described as x parts by mass and component Y as y parts by mass, then the mass ratio of component X to component Y is x:y. One part by mass can represent any mass; for example, one part by mass can be expressed as 1 kg or 3.1415926 kg, etc. The sum of the parts by mass of all components is not necessarily 100 parts; it can be greater than 100 parts, less than 100 parts, or equal to 100 parts. Unless otherwise stated, parts, proportions, and percentages mentioned herein are all measured by mass.

[0049] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0050] When concentration, temperature, pressure, size, or other parameters are expressed as numerical ranges, such ranges should be understood to specifically disclose all ranges formed by any pairing of upper limits, lower limits, or preferred values ​​within that range, regardless of whether the range is explicitly stated; for example, if the numerical range "2 to 8" is stated, then that range should be interpreted to include ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise stated, the numerical ranges described herein include both their endpoints and all integers and fractions within that range.

[0051] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience and simplification of description and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this document.

[0052] The embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0053] like Figure 6 As shown, a switch device for a switch machine, applied to an electric switch machine, specifically includes a square main frame, a stationary contact assembly, and a moving contact assembly. The square main frame includes an upper stationary contact assembly mounting base 3, a lower base 10, a rear upright plate 8 at the rear end, and a front upright plate 11 at the front end, which are connected to each other to form a square frame.

[0054] like Figure 7 and 8 As shown, there are N stationary contact components, N≧3; in this example, N=3 is selected; the three stationary contact components are installed side by side at the top of the square main frame, that is, below the stationary contact component mounting base 3; the stationary contact component includes two pairs of left and right symmetrical stationary contacts 4, and the two contact arc surfaces 41 of one pair of stationary contacts 4 on one side are V-shaped with the opening facing downward.

[0055] like Figure 9As shown, the stationary contact assembly includes an electrically insulated stationary contact base 42. The top of the stationary contact base 42 has a glue-receiving groove, and the bottom of the glue-receiving groove has two stationary contact mounting through holes facing downwards. The stationary contact 4 is inserted into the stationary contact mounting through holes from below, and a lead wire 44 is welded to its top. An insulating sleeve 43 is fitted around the base of the lead wire 44. The glue-receiving groove is filled with sealant 46, which solidifies and fixes the stationary contact 4 to the stationary contact base 42. The sealant 46 can be epoxy resin AB glue, a commonly used commercial adhesive. Traditionally, the connection between the lead wire 44 and the stationary contact 4 is also welded, with the stress point at the weld point 45; this is the weakest point in the connection and prone to failure. In this example, the stress point is far from the weld point 45, at the base of the sealant 46 outside the insulating sleeve 43, improving the fatigue resistance of the lead wire 44. Furthermore, in this example, the lead wire 44 is welded, the insulating sleeve 43 is fitted, and then the sealant 46 is cured. This effectively reduces the on-site fabrication of wire loops and improves installation efficiency.

[0056] like Figure 10 As shown, the movable contact assembly includes a rotating shaft 14 and N movable contacts 5. In this example, N=3, meaning three movable contacts 5. The rotating shaft 14 is installed below the bottom static contact assembly within the square main frame, meaning its rear end is installed on the rear upright plate 8, and its front end passes through the front upright plate 11. The front upright plate 11 and the rear upright plate 8 support the rotating shaft 14, allowing it to rotate. The three movable contacts 5 are fixed side-by-side on the rotating shaft 14, and can be fixed using a known method.

[0057] like Figure 11 As shown, the moving contact 5 also includes an electrically insulated moving contact seat 52, a dust cover 7, a contact spring 6, and a fixing pin 53. The moving contact seat 52 is mounted on the rotating shaft 14. In this example, the moving contact seat 52 of the moving contact 5 has a square hole in its center that mates with the square shaft segment of the rotating shaft 14. Installation is simple and convenient, and the positioning is accurate. The moving contact seat 52 has a protrusion 54 along the radial direction. The moving contact ring 51, the contact spring 6, and the dust cover 7 are sequentially mounted on the protrusion 54 along the radial direction via the fixing pin 53. Specifically, the lower end of the fixing pin 53 has a thread that connects and fixes to the embedded nut 55 embedded in the protrusion 54 of the moving contact seat 52. The moving contact ring 51 is loosely fitted on the fixing pin 53 and supported by the contact spring 6 below, allowing it to float and rotate freely. The contact spring 6 provides contact pressure between the moving contact 5 and the stationary contact 4, ensuring the contact pressure of the moving contact ring 51 and ensuring reliable contact between the moving contact ring 51 and the contact arc surface 41 of the stationary contact. In this example, the contact surface of the moving contact ring 51 of the moving contact 5 is conical; the cone angle is approximately 120º.

[0058] One end of the rotating shaft 14 extends out of the square main frame and is fixedly connected to the inner end of the actuating arm 15. Specifically, the front end of the rotating shaft 14 extends out of the front upright plate 11; the actuating arm 15 is installed at the front end, specifically connected to the inner end of the actuating arm 15; the other end, the outer end, of the actuating arm 1 is connected to and installed with a roller 1. (See reference.) Figure 15 and Figure 16 In the initial position, the roller 1 is mounted above or below the rotating shaft 14 via the toggle arm 15, which facilitates operation of the switch device in different directions.

[0059] A shaft reset torsion spring 12 is installed on the extended end shaft section of the shaft 14. The shaft reset torsion spring 12 is sleeved on the extended end shaft section of the shaft 14. The specific installation structure of the shaft reset torsion spring 12 is common knowledge and will not be described in detail.

[0060] The square main frame is also equipped with a limiting mechanism to restrict the swing range of the toggle arm 15; specifically, such as... Figure 12 As shown. The limiting mechanism includes a supporting limiting plate 13, which is fixed to the square main frame. The extended end of the rotating shaft 14 extends out of the supporting limiting plate 13 and connects to the actuating arm 15. In this example, the base 10 of the square main frame extends forward and connects to the lower end of the supporting limiting plate 13. An mounting plate 2 is added to the upper end of the supporting limiting plate 13 and connects to the static contact assembly mounting seat 3. The supporting limiting plate 13 is provided with an arc-shaped limiting groove 131. The outer end of the actuating arm 15 is provided with a pin 151 passing through the arc-shaped limiting groove 131. The pin 151 swings within the arc-shaped limiting groove 131, limiting the swing range of the actuating arm 15. Specifically, as shown... Figure 11 As shown, the pin 151 can be the shaft for mounting the roller 1. After extending into the arc-shaped limiting groove 131, its tail end engages with the end of the rotating shaft reset torsion spring 12. Under the action of the rotating shaft reset torsion spring 12, it drives the toggle arm 15 to reset, thereby driving the rotating shaft 14 to reset.

[0061] In this example, as Figure 13 As shown, the centers 411 of the static arcs of the two contact surfaces 41 of the pair of stationary contacts 4 are not concentric. The centers 411 are symmetrically positioned on both sides of the rotation axis 511 of the moving contact 5. In other words, the centers 411 of the static arcs of the two contact surfaces 41 of the stationary contacts 4 and the rotation axis 511 of the moving contact 5 are eccentrically designed. This eccentric design causes the movement trajectory of the moving contact ring 51 of the moving contact 5 to float between the "initial movement trajectory" and the "movement trajectory after compression of the contact spring 6" in the figure. This reduces the drop when the moving contact ring 51 contacts the contact surface 41 without affecting the sweep stroke and final overtravel; it also reduces the impact force at the moment of contact of the moving contact, increasing the service life and reliability of the moving contact element and reducing wear.

[0062] In this example, the radius of the arc of the two contact surfaces 41 of a pair of stationary contacts 4 is greater than the distance from the contact point of the moving contact ring 51 of the moving contact 5 to the rotation axis of the moving contact 5. If they are equal, it means that the center of the stationary arc 411 is concentric with the rotation axis 511. If they are greater, it means that the center of the stationary arc 411 is located to the left and right below the rotation axis 511.

[0063] like Figure 14 As shown, in this example, the two contact arc surfaces 41 of the stationary contact 4 are designed as symmetrical V-shapes, and the moving contact ring 51 is designed as an annular ring. The moving contact ring 51 is loosely fitted onto the fixed pin 53. During operation, the moving contact ring 51 will rotate, thus achieving uniform wear and improving the product's service life. The contact surface of the moving contact ring 51 is conical, matching the symmetrical V-shape of the two contact arc surfaces 41. The mating surfaces use end-face contact, making signal output more reliable. Simultaneously, because the moving contact ring 51 provides stable support under the action of the contact spring 6, compared to the original rib-type contact, the moving contact 5 can maintain stable contact pressure when contacting the stationary contact 4, significantly improving the vibration resistance of this invention. It is evident that the actuation mechanism design in this example is simple, without intermediate transmission mechanisms, reducing potential failure points and improving product safety.

[0064] In this example, the motion of the moving contact 5 is designed as a rotation, while the contact surface of the stationary contact 4 is designed as an arc. After changing the linear motion to circular motion, the moving contact 5 and the stationary contact 4 can achieve a greater engagement stroke on the arc within the same distance, thereby increasing the sweeping stroke in a limited space; thus enabling the contact to obtain a greater sweeping stroke in a limited space.

[0065] In this example, the stationary arc center 411 of the stationary contact 4 and the rotation axis 511 of the moving contact 5 adopt an eccentric design. When the moving contact 5 is inserted into the stationary contact 4, the arc of the stationary contact 4 gradually presses down on the moving contact 5. While reducing the drop, this design can effectively reduce the impact force of the moving contact 4 during insertion and improve the contact life.

[0066] In this example, to address the impact of metal dust generated during switch operation on insulation, a dust cover 7 was designed to effectively shield the metal dust generated during contact operation, achieving maintenance-free operation.

[0067] During operation, when the working mechanism touches the roller 1, the roller 1 drives the actuating arm 15 to swing, which in turn drives the rotating shaft 14 to rotate. At the same time, the rotating shaft reset torsion spring 12 is pressed by the pin 151. The moving contact 5 rotates with the rotating shaft 14, and the contact surface of the moving contact ring 51 of the moving contact 5 disengages from the two contact arc surfaces 41 of the pair of stationary contacts 4 on the initial position side. It continues to rotate to the target position side, and the contact surface of the moving contact ring 51 of the moving contact 5 contacts and engages with the two contact arc surfaces 41 of the pair of stationary contacts 4 on the target position side; thus reaching the target position state.

[0068] When a reset is required, the working mechanism disengages from roller 1, the shaft reset torsion spring 12 resets, and drives the shaft 14 to rotate and reset; the moving contact 5 resets with the rotation of the shaft 14. As the contact 5 rotates with the shaft 14, the contact surface of the moving contact ring 51 of the moving contact 5 disengages from the two contact arc surfaces 41 of the pair of stationary contacts 4 on the target position side, and continues to rotate to the initial position side. The contact surface of the moving contact ring 51 of the moving contact 5 then contacts and engages with the two contact arc surfaces 41 of the pair of stationary contacts 4 on the initial position side, returning to the initial position.

[0069] Since the arc-shaped limiting groove 131 in the limiting mechanism restricts the pin 151 from swinging within the arc-shaped limiting groove 131, it restricts the swing range of the toggle arm 15, and thus restricts the moving contact ring 51 of the moving contact 5 from swinging between the initial position and the target position.

[0070] As can be seen, when the switch machine is about to switch to the terminal position, the modular contact will quickly switch from one closed position to another under the drive of other quick-acting mechanisms of the switch machine. At this time, due to the drive of the quick-acting mechanism, there is a large impact force when the contact is switched to the position. In order to offset the signal flashover caused by the rebound of the moving contact at the final position, this solution is designed with a torsion spring structure to offset part of the impact rebound force, and at the same time, it can also keep the contact in a stable and reliable contact state.

[0071] Beneficial effects of the technical solution of this invention

[0072] 1. The motion mechanism is designed in a simple way, without intermediate transmission mechanisms, reducing failure points and improving product safety;

[0073] 2. The floating design of the moving contact and the V-shaped design of the stationary contact generate centripetal force, effectively improving the vibration resistance of the contact.

[0074] 3. The contact design of the moving and stationary contact surfaces can achieve balanced wear of the contacts and improve the service life of the product;

[0075] 4. Designed with a large sweeping stroke, it can achieve a self-cleaning function of the contact head during operation;

[0076] 5. The dust cover can effectively block the metal dust generated by contact grinding, thus improving insulation performance;

[0077] 6. The torsion spring structure ensures stable and reliable contact at the joints;

[0078] 7. Modular contacts can be designed with at least one or more sets of contacts that can be connected or disconnected simultaneously.

[0079] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A switching device for a switch machine, characterized in that, Includes a square main frame, static contact components, and dynamic contact components; The static contact assembly has N units, N≧3; they are installed side by side on the top of the square main frame; the static contact assembly includes two pairs of left and right symmetrical static contacts (4), and the two contact arc surfaces (41) of one pair of static contacts (4) on one side are V-shaped with the opening facing downward. The moving contact assembly includes a rotating shaft (14) and N moving contacts (5). The rotating shaft (14) is installed below the bottom static contact assembly inside the square main frame. The N moving contacts (5) are fixed side by side on the rotating shaft (14). The contact surface of the moving contact ring (51) of the moving contact (5) is conical. One end of the rotating shaft (14) extends out of the square main frame and is fixedly connected to the inner end of the actuating arm (15). A roller (1) is installed on the outer end of the actuating arm (15). A rotating shaft return torsion spring (12) is installed on the extended end shaft section of the rotating shaft (14). The trigger roller (1) drives the lever arm (15) to swing, which in turn drives the rotating shaft (14) to rotate. At the same time, the rotating shaft reset torsion spring (12) is pressed. The moving contact (5) rotates with the rotating shaft (14). The contact surface of the moving contact ring (51) of the moving contact (5) disengages from the two contact arc surfaces (41) of a pair of stationary contacts (4) on the initial position side. It continues to rotate to the target position side. The contact surface of the moving contact ring (51) of the moving contact (5) contacts and engages with the two contact arc surfaces (41) of a pair of stationary contacts (4) on the target position side. The moving contact ring (51) reaches the target position. When the roller (1) is disengaged, the shaft reset torsion spring (12) resets, driving the shaft (14) to rotate back to reset; the moving contact (5) rotates back to reset with the shaft (14), and the contact (5) rotates with the shaft (14). The contact surface of the moving contact ring (51) of the moving contact (5) disengages from the two contact arc surfaces (41) of a pair of stationary contacts (4) on the target position side, and continues to rotate to the initial position side. The contact surface of the moving contact ring (51) of the moving contact (5) contacts and engages with the two contact arc surfaces (41) of a pair of stationary contacts (4) on the initial position side, and the moving contact ring (51) returns to the initial position. The static arc centers (411) of the two contact arc surfaces (41) of the pair of static contacts (4) are not concentric. The static arc centers (411) are symmetrically arranged on both sides of the rotation axis (511) of the moving contact (5). The arc radius of the two contact arc surfaces (41) of the pair of static contacts (4) is greater than the distance from the contact point of the moving contact ring (51) of the moving contact (5) and the contact arc surface (41) to the rotation axis (511) of the moving contact (5). The square main frame is also provided with a limiting mechanism to limit the swing range of the toggle arm (15); the moving contact ring (51) of the moving contact (5) is limited to swing between the initial position and the target position.

2. The switching device for a switch machine according to claim 1, characterized in that, The moving contact (5) also includes a moving contact seat (52), a dust cover (7), a contact spring (6), and a fixing pin (53); The moving contact seat (52) is mounted on the rotating shaft (14); a protrusion (54) is provided in the radial direction, and a moving contact ring (51), a contact spring (6) and a dust cover (7) are installed in sequence on the protrusion (54) by means of a fixing pin (53). The moving contact ring (51) is loosely fitted onto the fixed pin (53), supported by the lower contact spring (6), and can float and rotate freely.

3. The switch device for a switch machine according to claim 2, characterized in that, The moving contact seat (52) has a square hole in the center that fits with the square shaft segment of the rotating shaft (14) for installation.

4. The switch device for a switch machine according to claim 1, 2 or 3, characterized in that, The limiting mechanism includes a supporting limiting plate (13), which is fixed on the square main frame. The extended end of the rotating shaft (14) extends out of the supporting limiting plate (13) and is then connected to the toggle arm (15). The support limiting plate (13) is provided with an arc-shaped limiting groove (131), and the outer end of the toggle arm (15) is provided with a pin (151) that passes through the arc-shaped limiting groove (131) and swings within the arc-shaped limiting groove (131) to limit the swing range of the toggle arm (15).

5. The switching device for a switch machine according to claim 1, 2, or 3, characterized in that, The static contact assembly includes an electrically insulating static contact base (42). The top of the static contact base (42) is provided with a glue-containing groove. The bottom of the glue-containing groove has two static contact mounting through holes facing downwards. The static contact (4) is inserted into the static contact mounting through holes from below. A lead wire (44) is welded to the top of the static contact base. An insulating sleeve (43) is fitted at the root of the lead wire (44). The glue-containing groove is filled with sealant (46). The sealant (46) solidifies and connects the static contact (4) to the static contact base (42).

6. The switching device for a switch machine according to claim 1, 2 or 3, characterized in that, The roller (1) in the initial position is mounted above or below the pivot (14) via a lever (15).

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