Conductive rail for base element of at least two-part protection device, and base element
By using bent plate elements to form conductive rails in one piece, the manufacturing process is simplified, and the problems of complex and high cost of conductive rails in the prior art are solved, and the effect of reducing manufacturing consumption and production costs is achieved.
Patent Information
- Application Number
- CN202420326160.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-04
- Filing Date
- 2024-02-20
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-20
AI Technical Summary
In the prior art, the manufacturing of conductive rails requires multiple complex working steps, resulting in an increase in production costs.
By forming the conductive rails in one piece using at least partially curved sheet elements, the connection steps of different regions are eliminated, and the manufacturing process is simplified. The at least one contact area is configured as a plum contact having a first contact arm and at least one second contact arm, formed by a curved section of the plate element.
It significantly reduces the manufacturing cost of manufacturing conductive rails, simplifies the production process, reduces production costs, and ensures reliable contact and mechanical strength of the conductive rails.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to a conductor rail for a basic element of an at least two-part protective device, wherein the conductor rail has a base body, which has a first contact area at its first end and a second contact area at its second end. In addition, the utility model relates to a corresponding basic element for the at least two-part protective device. Background Art
[0002] In low-voltage energy distribution, various protective devices or protection devices are used to protect electronic equipment and electrical installations to prevent overload, short-circuit current and overvoltage. The protection devices include, for example, equipment protection switches and overvoltage protection devices, which are often installed on support rails in switch cabinets.
[0003] Equipment protection switches are used to protect electronic equipment, machines and equipment from overload and short-circuit currents, wherein only the relevant circuits are disconnected in a targeted manner in the event of a fault. For ideal insurance, protection switches are used, which work electronically, thermally, magnetically or thermally with different technologies. The thermal magnetic equipment protection switch consists of two protection mechanisms that work independently of each other. On the one hand, the bimetal is used to delay the thermal triggering in time when overloaded to avoid false triggering. On the other hand, the electromagnetic coil is used to trigger without delay in time when short-circuited. If a high current flows through the electromagnetic coil, a magnetic field is generated, which releases the locking hook inside the protection switch. As a result, the circuit is stopped and the current flow is therefore stopped. At this point, it has been known for many years that such a protection device is constructed in a multi-piece manner. A two-piece protection device has a basic element and a protection element, which can be inserted into the protection element receiving portion of the basic element.
[0004] It is known from the prior art that a conductive connection is realized in the basic element with a conductor rail. The conductor rail has a contact area at the end, which is often realized, for example, as a spring contact or a clamping contact. It is common here to manufacture the contact area from a material different from the base body of the conductor rail, so that the conductor rail is constructed in a multi-piece manner. For example, it is known in the prior art that the contact area is constructed as a plum blossom contact. This plum blossom contact is then welded to the base body of the conductor rail in order to achieve a non-detachable connection. However, such a processing method is associated with high production and manufacturing costs. In particular, the manufacture of such a conductor rail requires a plurality of cumbersome working steps, which leads to an increase in production costs. Utility Model Content
[0005] The object of the invention is to provide a conductor rail for a base part of an at least two-part protective device, which base part can be produced in a simpler manner than in the prior art.
[0006] For the conductor rail according to the utility model having the following features:
[0007] A conductor rail for a basic element of an at least two-part protective device,
[0008] wherein the busbar has a base body which has a first contact region at its first end and a second contact region at its second end,
[0009] The object is achieved in that the conductor rail is formed in one piece from an at least partially bent sheet metal element. In addition, in the conductor rail according to the invention, at least one contact region is configured as a plum blossom contact having a first contact arm and at least one second contact arm. If this means that the conductor rail is formed in one piece, then this means that the conductor rail is formed from a single component. The plum blossom contact is therefore not fastened to the base of the conductor rail as in the prior art.
[0010] According to the invention, it has been found that the manufacturing effort for producing the busbar can be significantly reduced if the busbar is designed in one piece and is also produced from a bent sheet metal element. In particular, the step of connecting different areas of the busbar is omitted.
[0011] The conductor or contact to be contacted is inserted between the contact arms of the plum blossom contact and is contacted by these contact arms. The at least two contact arms are arranged relative to each other so that they are converted into a pre-tensioned state when the conductor or contact is inserted, in particular, they are slightly pressed outward by the conductor or contact. Therefore, the contact arms are intended to be converted into a relaxed state again and apply a spring force to the conductor or contact, thereby ensuring reliable contact.
[0012] Different requirements are placed on the material of the conductor rails. On the one hand, the current carrying capacity of the conductor rails must be sufficient in order to be able to absorb voltage peaks, in particular, so that no damage to the conductor rails or even the base element occurs when voltage peaks occur. On the other hand, the material must have sufficient mechanical strength in order to be able to ensure contact or mechanical fixation of the inserted conductors or contacts. For this purpose, the elasticity of the material must be sufficiently high.
[0013] A particularly preferred embodiment of the conductor rail according to the invention is characterized in that the sheet metal element is made of a copper-nickel alloy. It is particularly preferred that the sheet metal element is made of a Cu3Ni6 alloy. It has been found that this material is particularly suitable for many applications, in particular for use in device protective housings that implement the thermomagnetic principle. The copper-nickel alloy has sufficient current carrying capacity while having sufficient elasticity.
[0014] There are various feasible schemes for realizing the contact arm of the plum blossom contact. Since the conductive track is generally formed by a single bent sheet element, the common point of all variants is that the contact arm is formed by a bent section of the sheet element. In a first variant, the first contact arm is formed by an internal contact tongue of the sheet element, and the second contact arm is formed by an external contact sheet with a first gap. It is particularly preferred that the contact tongue and the first gap complement each other. This means that the first gap in the contact sheet is formed by bending or bending out the internal contact tongue.
[0015] In the second and third variants, the first contact arm is formed by a first tongue, and the second contact arm is formed by a second tongue. In the second variant, both the first tongue and the second tongue are I-shaped. In order to realize such a plum blossom contact, a slit extending in the longitudinal direction of the conductor rail is punched out at one end of the conductor rail and two I-shaped tongues are thus formed, which are then bent accordingly. In order to enable the conductor or contact to be contacted to be held by the two bent tongues, the two tongues are bent so that they at least partially overlap in the direction of viewing along the longitudinal axis of the substrate. Therefore, at least one contact tongue is deflected obliquely to the longitudinal axis of the substrate.
[0016] In a third variant, the first tongue is configured in an I-shaped manner, and the second tongue is also configured in an L-shaped manner. To realize such a plum blossom contact, an L-shaped slot is punched out at one end of the conductor track and thus two tongues are formed, which are then bent accordingly.
[0017] In order to simplify the insertion of the conductor, the contact arm is preferably bent outwardly away from the insertion opening at its insertion end. Thus, the risk of unintentional bending of the contact arm due to improper insertion of the conductor is reduced to a minimum.
[0018] In a particularly preferred embodiment, the conductor track according to the invention is distinguished in that at least one contact region is implemented as a contact leg and the contact leg is bent away from the base body at an angle of less than 180°, in particular less than 135°, preferably at an angle of approximately 90°. Preferably, the bending edge extends perpendicularly to the longitudinal axis of the base body. It is further preferred that the insertion end of the contact leg is bent away from the contact leg so that the insertion of the conductor does not lead to an unintentional bending of the contact leg.
[0019] Particularly preferably, a design of the conductor rail is characterized in that at least one retaining tongue is formed in the base body and extends at an angle relative to the base body. In particular, the contact leg mentioned in conjunction with the previously described design of the conductor rail forms, together with the clamping leg of the clamping spring, a spring-force clamping connection for an external conductor or contact to be connected. The retaining tongue then serves to abut against the second leg of the clamping spring, in order to thereby achieve a resistance that enables prestressing of the spring.
[0020] In a special variant of the conductor track, the retaining tongue is formed from the base body by stamping and subsequent bending of the stamped region. Very particularly preferably, the contact tongue is bent in such a way that it extends substantially parallel to the previously described contact leg and thus substantially perpendicularly to the adjacent region of the base body.
[0021] In another embodiment of the busbar, a plurality of retaining tongues can be formed in the base body. In a variant, the formation of at least one retaining tongue is also realized without forming a contact leg.
[0022] Another preferred design of the conductor track of the utility model has a second recess for inserting a contact element. The second recess is constructed in the substrate. For example, a contact bridge can be inserted here. In an advantageous manner, the second recess has a flange, which can be manufactured by deep drawing.
[0023] In addition to the conductor rail, the invention also relates to a basic element for an at least two-part protective device, such as an overvoltage protection device or a device protection switch, which has a protective element receptacle for a protective element of the protective device, a first receptacle for receiving a first external conductor, and a second receptacle for receiving a second external conductor.
[0024] For the basic element, the aforementioned task is solved in the following manner, namely: at least one conductive track having a base body is arranged in the basic element, wherein the base body has a first contact area at its first end and a second contact area at its second end. In addition, the conductive track is formed in one piece by a sheet metal element that is at least partially bent. At least one contact area is configured as a plum blossom contact, which has a first contact arm and at least one second contact arm. The first contact area of the conductive track is configured to at least indirectly contact a first conductor arranged in a first receiving portion or a second conductor arranged in a second receiving portion. In addition, the second contact area of the conductive track is configured to at least indirectly contact a contact of a protective element inserted into a protective element receiving portion.
[0025] All the above explanations in connection with the conductor rail according to the invention in connection with the preferred embodiments and the advantages arising therefrom apply accordingly to the basic element according to the invention. In different variants of the basic element according to the invention, the conductor rail is correspondingly constructed according to the above different preferred embodiments.
[0026] The basic element usually has more than one conductive element. A special embodiment of the basic element according to the invention is characterized in that the basic element has at least one second conductive track and the at least one second conductive track is formed in the manner and method according to the invention described above. The basic element then has two conductive tracks according to the invention, which can differ from each other in particular in their size.
[0027] All of the above explanations in connection with the conductor rail according to the invention in connection with the preferred embodiments and the advantages resulting therefrom also apply accordingly to the embodiment of at least the second conductor rail and can be applied analogously. The at least two conductor rails can be designed identically or differently. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In detail, there are currently a large number of possible solutions for designing and improving the conductor rail according to the utility model and the basic elements according to the utility model. For this purpose, reference is made to the following claims and the description of preferred embodiments in conjunction with the accompanying drawings. In the drawings:
[0029] Figure 1 A first view showing a first embodiment of the conductor rail,
[0030] Figure 2 It shows that Figure 1 A second view of the conductor rail is shown in FIG.
[0031] Figure 3 A view of an unbent sheet metal element is shown, which in the bent state forms the Figure 1 and 2 The conductor rail shown in
[0032] Figure 4 A first view of a second embodiment of the conductor rail is shown,
[0033] Figure 5 It shows that Figure 4 A second view of the conductor rail is shown in FIG.
[0034] Figure 6 It shows that Figure 4 A third view of the conductor rail shown in FIG.
[0035] Figure 7 A view of an unbent sheet metal element is shown, which in the bent state forms the Figure 4 , 5 and the conductive rails shown in 6,
[0036] Figure 8 A first view of a third embodiment of the conductor rail is shown,
[0037] Fig. 9 It shows that Figure 8 A second view of the conductor rail is shown in FIG.
[0038] Fig.10 A view of an unbent sheet metal element is shown, which in the bent state forms the Figure 8 and 9 The conductor rail shown in
[0039] Fig.11 shows a side view of the basic element,
[0040] Fig.12 The exploded view of the parts shows Fig.11 The basic components in. DETAILED DESCRIPTION
[0041] Figure 1 The diagram shows a first embodiment of a conductor rail 1 for a base element 2 of an at least two-part protective device, wherein the protective device can be, for example, an installation circuit breaker. Fig.11 As shown from the side. Fig.11 It can be seen that the basic element 2 has a protective element receptacle 3, into which a protective element or a protective plug can be inserted. In addition, the basic element 2 has a first receptacle 4 for receiving a first external conductor and a second receptacle 5 for receiving a second external conductor. A first conductor track 1 is arranged in the basic element 2, which first conductor track realizes an electrically conductive connection between the first receptacle 4 or a conductor inserted therein and the protective element receptacle 3 or a protective element inserted therein.
[0042] As especially in Figure 1As can be seen in the figure, the conductor rail 1 has a base body 6, wherein a first contact region 8 is formed at a first end 7 of the base body 6. The first contact region 8 serves to at least indirectly contact a first external conductor, which is inserted into the first receptacle 4. At a second end 9, the base body 6 has a second contact region 10, which serves to at least indirectly contact a contact of a protective element inserted into the protective element receptacle 3. The conductor rail 1 is formed in one piece from an at least partially bent sheet metal element 11. "In one piece" means that the conductor rail 1 is formed from a single sheet metal element 11, i.e. not from a plurality of elements connected to one another.
[0043] Figure 2 It shows that Figure 2 Another view of the conductor rail 1 is shown in FIG. Figure 1 and 2 In the conductor track 1 shown in FIG. 1 , the second contact region 10 is configured as a plum blossom contact 12. The plum blossom contact 12 has a first contact arm 13 and a second contact arm 14, wherein the first contact arm 13 is formed by an inner contact tongue 15 of the sheet element 11 and the second contact arm 14 is formed by an outer contact piece 16 of the sheet element 11. The contact piece 16 has a first recess 17. The first recess 17 is produced in the following manner, namely: the contour of the inner contact tongue 15 is freely punched out of the base body 6 and then the contact tongue 15 is bent. The inner contact tongue 15 and the outer contact piece 16 are therefore complementary to each other.
[0044] In order to form the plum blossom contact 12, the first contact arm 13 and the second contact arm 14 are bent away from the base body 6. Here, the angle α between the base body 6 and the first contact arm 13 is slightly greater than 90°, and the angle β between the base body 6 and the second contact arm 14 is slightly less than 90°, wherein the bending edge of the first contact arm 13 is further away from the second end 9 than the bending edge of the second contact arm 14. In this way, it is achieved that the contact arms 13 and 14 form a plum blossom contact 12 that tapers upward with an insertion opening 18.
[0045] In order to simplify the insertion of the contact into the plum blossom contact 12 and in particular to avoid undesired bending of the contact arms 13, 14 due to the insertion, the insertion ends 19 of the contact arms 13, 14 are each bent outwardly away from the insertion opening 18. Figure 2 It can be clearly seen in.
[0046] Figure 3 The punched sheet metal element 11 is shown, which can be bent into Figure 1 and 21. In particular, the complementary design of the first contact arm 13 as an inner contact tongue 15 and the design of the second contact arm 14 as an outer contact piece 16 in the second contact region 10 can be clearly seen. In the embodiment shown, the sheet metal element 11 is made of a copper-nickel alloy, namely a Cu3Ni6 alloy.
[0047] exist Figure 4 , 5 6 show a second embodiment of the conductor track 1 in different views. The conductor track 1 shown here is basically the same as that described in the embodiment of the plum blossom contact 12. Figure 1 and 2 The conductor rails 1 shown in FIG. 1 are different.
[0048] If especially by Figure 4 It can be seen that Figure 1 and 2 Unlike the design shown in , the two contact arms 13, 14 are formed by I-shaped tongues 20, 21. In order to construct the plum blossom contact 12, the first contact arm 13 and the second contact arm 14 are also bent away from the base body 6. Here, the angle α between the base body 6 and the first contact arm 13 is slightly greater than 90°, and the angle β between the base body 6 and the second contact arm 14 is slightly less than 90°. The bent edge of the first contact arm 13 is also spaced farther from the second end 9 than the bent edge of the second contact arm 14. In addition, the two tongues 20, 21 are bent in such a way that they overlap in the visual direction along the longitudinal axis of the base body. This can be seen in particular by Figure 5 See, because Figure 5 A plan view of the contact cluster 12 is shown along the longitudinal axis of the busbar 1 .
[0049] In the Figure 4 , 5 In the conductor rail 1 shown in FIGS. 1 and 6 , the insertion ends 19 of the two contact arms 13 , 14 are also bent outwardly away from the insertion opening 18 . This can be particularly useful in Figure 6 It can be clearly seen in.
[0050] Figure 7 The unbent sheet metal element 11 is shown, which in the bent state forms the Figure 4 , 5 6. It can be seen here in particular that the two contact arms 20, 21 are designed in an I-shape. This is achieved in that the slot 22 extending along the longitudinal axis of the sheet metal element 11 is punched into the sheet metal element 11 at the second end 9.
[0051] exist Figure 8 and9 , a third design of the conductor rail 1 is shown. The conductor rail 1 shown here is also different from the first or second embodiment of the conductor rail 1 by the design of the plum blossom contact 12. The first contact arm 13 is configured as an I-shaped tongue 23, and the second contact arm 14 is configured as an L-shaped tongue 24. Fig.10 In the sheet metal element 11 shown in the unbent state, an L-shaped slot 25 is punched into the second contact region 10. The two tongues 23, 24 are then bent as described above in conjunction with the other embodiments.
[0052] In all previously described embodiments of the conductor track 1, the first contact region 8 is implemented as a contact leg 26, which is bent away from the base body 6 at an angle γ. In the embodiment shown, the contact leg 26 is bent away from the base body 6 at an angle of 90°. In addition, the contact leg 26 is bent away from the base body 6 in the same direction as the contact arms 13, 14 of the plum blossom contact 12.
[0053] Furthermore, in all the illustrated and previously described embodiments of the conductor rail 1, a retaining tongue 27 is formed in the corresponding base body 6, which extends at an angle δ relative to the base body 6. In the illustrated embodiment, the retaining tongue 27 is formed parallel to the contact leg 26 and is therefore also bent away from the base body 6 at an angle of 90°. The retaining tongue 27 is formed by subsequent bending of the stamped and free-stamped areas. The retaining tongue 27 serves as abutment for a clamping spring 30, wherein the contact leg 26 together with the clamping leg 31 of the clamping spring 30 realizes a spring-force clamping connection for an external conductor or contact to be connected.
[0054] Fig.11 The basic element 2 is shown, in which the Figure 1 In addition, a further conductor rail 1 ' is installed, which differs from the conductor rail 1 in its design. Fig.12The basic element 11 is shown in a partial exploded view. For a better overview, the conductor rails 1, 1' are shown outside the housing of the basic element 2. The first conductor rail 1 connects the first terminal 4 to the protective element receiving portion 3. The second conductor rail 1' connects the second terminal 5 to the protective element receiving portion 3. In the second conductor rail 1', the first contact area 8 is also configured as a contact leg 26 and the second contact area 10 is also configured as a plum contact 12. The contact leg 26 forms a spring-force clamping terminal for an electrical conductor inserted into the second receiving portion 5 together with the clamping leg 31 of the clamping spring 30. In addition, the two conductor rails 1, 1' have at least one second recess 28 in the base body 6. In addition, the second recess 28 has a flange 29, thereby improving the electrical contact with the contact element inserted into the second recess 28, in particular the leg of the contact bridge.
[0055] The conductor rails 1, 1' shown are produced in such a way that in a first step a sheet material is provided, in a second step a sheet element 11 is punched out of the sheet material with a predetermined contour of the conductor rail 1, and in a third step the punched sheet element 11 is bent into the conductor rail 1 in such a way that at least one contact region 10 is designed as a plum blossom contact 12 having a first contact arm 13 and at least one second contact arm 14. Furthermore, in this case, a narrow sheet material strip having a maximum width B of the conductor rail 1 to be produced is already provided in the first step.
[0056] Reference numerals list
[0057] 1 Conductor rail
[0058] 2 Basic components
[0059] 3 Protective element receiving part
[0060] 4First receiving part
[0061] 5Second receiving part
[0062] 6 Matrix
[0063] 7 The first end of the base
[0064] 8First contact area
[0065] 9 The second end of the base
[0066] 10 Second contact area
[0067] 11 Plate elements
[0068] 12 plum blossom contacts
[0069] 13 First contact arm
[0070] 14 Second contact arm
[0071] 15 Internal contact tongue
[0072] 16 External contact piece
[0073] 17 The First Gap
[0074] 18 Insertion port
[0075] 19 Insert end
[0076] 20 I-shaped tongue
[0077] 21 I-shaped tongue
[0078] 22 Gap
[0079] 23 I-shaped tongue
[0080] 24 I-shaped tongue
[0081] 25 Gap
[0082] 26 Contact outriggers
[0083] 27 Keep tongue
[0084] 28 The Second Gap
[0085] 29 flange
[0086] 30 Clamping spring
[0087] 31 Clamp the legs
Claims
1. A conductor rail (1) for a base element (2) of an at least two-part protective device, The conductor track (1) comprises a base body (6) which has a first contact region (8) at its first end (7) and a second contact region (10) at its second end (9), It is characterized in that The conductor rail (1) is formed in one piece from an at least partially bent sheet metal element (11), and At least one contact region (10) is designed as a plum blossom contact (12) having a first contact arm (13) and at least one second contact arm (14).
2. The conductor rail (1) according to claim 1, characterized in that The sheet metal element (11) is made of a copper-nickel alloy, in particular a Cu3Ni6 alloy.
3. The conductor rail (1) according to claim 1 or 2, characterized in that The first contact arm (13) is formed by an internal contact tongue (15) of the sheet metal element (11), and the second contact arm (14) is formed by an external contact piece (16) having a first recess (17), in particular wherein the contact tongue (15) and the first recess (17) are complementary to one another.
4. Conductor rail (1) according to claim 1 or 2, characterized in that The first contact arm (13) is formed by a first tongue (20, 23) and the second contact arm (14) is formed by a second tongue (21, 24), in particular wherein the first tongue (20, 23) is I-shaped and wherein the second tongue (21, 24) is I-shaped or L-shaped.
5. The conductor rail (1) according to claim 1, characterized in that At least one contact region (8) is implemented as a contact limb (26) which is angled away from the base body (6) at an angle γ of less than 135°.
6. Conductor rail (1) according to claim 5, characterized in that The contact leg (26) is angled away from the base body (6) at an angle γ of 90°.
7. Conductor rail (1) according to claim 1, characterized in that At least one retaining tongue (27) is formed in the base body (6) and extends at an angle δ relative to the base body (6).
8. Conductor rail (1) according to claim 1, characterized in that At least one second recess (28) for inserting a contact element is formed in the base body (6).
9. A basic element (2) for an at least two-part protective device, wherein the basic element (2) has a protective element receptacle (3) for a protective element of the protective device, a first receptacle (4) for receiving a first outer conductor and a second receptacle (5) for receiving a second outer conductor, It is characterized in that at least one conductor rail (1) according to any one of claims 1 to 8 is arranged in the base element (2), The first contact region (8) of the conductor rail (1) is provided for at least indirectly contacting a first conductor arranged in the first receiving portion (4) or a second conductor arranged in the second receiving portion (5), and The second contact region (10) of the conductor rail (1) is provided for at least indirectly contacting a contact of a protective element inserted into the protective element receptacle (3).
10. The basic element (2) according to claim 9, characterized in that At least one further conductor rail according to any one of claims 1 to 8 is arranged in the base element (2).