Change-over switch

Abstract

The utility model discloses a change-over switch. The change-over switch comprises a switch body; the mounting head assembly is connected to the switch body, and the mounting head assembly comprises a driving handle; the mounting head is connected to the end part of the driving handle; the mounting nut is connected to the outer wall of the mounting head; the first sealing unit is arranged on the outer wall of the mounting head in a sleeving mode and located between the mounting head and the mounting nut; the handle shaft is arranged in the mounting head, and one end of the handle shaft is connected to the driving handle; and the second sealing unit is arranged at the other end of the handle shaft in a sleeving manner and is accommodated in the inner cavity of the mounting head. The change-over switch is better in structural reliability and higher in protection level.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical technology, in particular to a transfer switch for the low-voltage electrical field. BACKGROUND

[0002] As an important electrical component, the transfer switch is widely used in the technical field of low-voltage electrical technology. The conventional lead-sealed transfer switch is mainly composed of a mounting head assembly and a switch base. The mounting head assembly does not have a V-shaped sealing ring, and there is no sealing washer between the mounting head assembly and the mounting plane. The protection capability of the product head can only reach IP54, or even lower. After long-term use, water vapor will enter the product, which will cause the surface of the contact to oxidize, resulting in unreliable contact of the contact, and further leading to failure of the switch. In fact, the harsh use environment puts forward higher requirements for the protection level of the product head.

[0003] In order to solve the above problems, the technical personnel in the field have developed a new design scheme to improve the protection capability of the transfer switch. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to overcome the deficiencies in the prior art, and to provide a transfer switch with reliable structure and higher protection level.

[0005] According to the transfer switch provided by the embodiment of the present application, the transfer switch comprises a switch body, a mounting head assembly connected to the switch body, the mounting head assembly comprising: a driving handle; a mounting head connected to the end of the driving handle; a mounting nut connected to the outer wall of the mounting head; a first sealing unit sleeved on the outer wall of the mounting head and located between the mounting head and the mounting nut; a handle shaft arranged in the interior of the mounting head, one end of the handle shaft being connected to the driving handle; and a second sealing unit sleeved on the other end of the handle shaft and accommodated in the inner cavity of the mounting head.

[0006] According to an optional implementation manner of the present application, the first sealing unit comprises: a lead seal cover sleeved on the outer wall of the mounting head; a first washer sleeved on the outer wall of the mounting head and located on the side of the lead seal cover close to the driving handle; and a second washer sleeved on the outer wall of the mounting head and located on the other side of the lead seal cover close to the mounting nut.

[0007] According to another optional implementation manner of the present application, at least one first hole is formed in the driving handle, and at least one second hole is formed in the side wall of the lead seal cover.

[0008] According to yet another alternative implementation of the present application, the handle shaft comprises a first shaft segment connected to the driving handle at one end, and a second shaft segment extending from the other end of the first shaft segment, wherein a mounting groove is formed on the second shaft segment, and the second sealing unit is accommodated in the mounting groove.

[0009] According to yet another alternative implementation of the present application, the second sealing unit comprises an annular sealing ring.

[0010] According to yet another alternative implementation of the present application, the annular sealing ring comprises an annular body and a V-shaped sealing seat connected above the annular body.

[0011] According to yet another alternative implementation of the present application, the outer circumferential dimension of the opening of the sealing seat is greater than the base dimension of the sealing seat connected to the annular body.

[0012] According to yet another alternative implementation of the present application, the outer circumferential dimension of the opening of the sealing seat is greater than the outer circumferential dimension of the annular body.

[0013] According to yet another alternative implementation of the present application, the first gasket and the second gasket are substantially identical in size and symmetrically arranged at the axial position of the lead seal cover.

[0014] According to yet another alternative implementation of the present application, a first hole is formed on the driving handle, and a plurality of second holes are correspondingly formed on the side wall of the lead seal cover. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. Among them:

[0016] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a switch according to an embodiment of the present application;

[0017] Figure 2 FIG. 2 is an exploded schematic diagram of a mounting head assembly in the switch according to an embodiment of the present application;

[0018] Figure 3 FIG. 3 is an exploded schematic diagram of a partial structure of the mounting head assembly in the switch according to an embodiment of the present application, mainly showing a handle shaft and a second sealing unit;

[0019] Figure 4 FIG. 4 is a schematic diagram of the overall structure of the mounting head assembly in the switch shown in FIG. 1; Figure 2

[0020] FIG. 5 is a schematic diagram of the overall structure of the mounting head assembly in the switch shown in FIG. 1; and Figure 5 Figure 4 ​Structure exploded schematic view of the mounting head assembly in the illustrated transfer switch.

[0021] List of reference signs

[0022] First gasket 61 of transfer switch 100

[0023] Second gasket 62 of switch body 10

[0024] Lead seal cover 63 of mounting head assembly 20

[0025] Second hole 631 of drive handle 30

[0026] Handle shaft 70 of mounting head 40

[0027] First hole 41 of first shaft section 71

[0028] Second shaft section 72 of mounting nut 50

[0029] Mounting groove 721 of first sealing unit 60

[0030] Annular body 811 of second sealing unit 80

[0031] Sealing seat 812 of sealing ring 81 DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, objectives and effects of the application, the specific embodiments of the application will be described with reference to the drawings, in which the same reference numerals represent the same or similar parts having the same function.

[0033] In this document, "illustrative" means "serving as an example, instance, or illustration," and should not necessarily be construed as preferred or advantageous over other examples, implementations, or embodiments.

[0034] In order to make the drawings simple, only the parts related to the application are schematically shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one or more of the parts having the same structure or function are schematically shown, or only one or more of the parts are indicated. Moreover, the drawings of the various descriptions of the application are only used to facilitate the description and understanding of the embodiments of the application, and are not necessarily drawn according to the actual scale.

[0035] The pronouns and nouns related to persons in this patent application are not limited to a specific gender.

[0036] In this document, "up", "down", "front", "back", "left", "right", and the like are only used to represent the positional relationship between the relevant parts, and not to limit their absolute positions.

[0037] In the present document, "first", "second", etc. are only used to distinguish one from another, but not to indicate their importance and sequence, etc.

[0038] In the present document, "parallel", "vertical", etc. are not strictly mathematical and / or geometric restrictions, but also include errors that can be understood by those skilled in the art and allowed by manufacturing or use, etc.

[0039] The orientation or positional relationship indicated in the description of the present application is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. The specific embodiments of the present application will be described in detail below in conjunction with the drawings.

[0040] Referring to Figure 1 It discloses the overall structure schematic diagram of the transfer switch according to an embodiment of the present application. The transfer switch 100 of the present application comprises a switch body 10 and a mounting head assembly 20. Specifically, the mounting head assembly 20 is connected to the switch body 10, and the mounting head assembly 20 comprises a driving handle 30, a mounting head 40, a mounting nut 50, a first sealing unit 60, a handle shaft 70 and a second sealing unit 80.

[0041] In order to more clearly show the position and connection relationship of each component, refer to Figure 2 It shows the exploded schematic diagram of the mounting head assembly in the transfer switch according to an embodiment of the present application. The mounting head 40 of the transfer switch of the present application is connected to the end of the driving handle 30; the mounting nut 50 is connected to the outer wall of the mounting head 40. The first sealing unit 60 is sleeved on the outer wall of the mounting head 40 and located between the mounting head 40 and the mounting nut 50. The handle shaft 70 is arranged in the inside of the mounting head 40, and one end of the handle shaft 70 is connected to the driving handle 30. The second sealing unit 80 is sleeved on the other end of the handle shaft 70 and accommodated in the inner cavity of the mounting head 40, so as to better realize the sealing and protection performance of the transfer switch.

[0042] It is worth pointing out that according to a specific embodiment of the present application, the first sealing unit 60 comprises a lead seal cover 63, a first gasket 61 and a second gasket 62. Specifically, the lead seal cover 63 is sleeved on the outer wall of the mounting head 40. The first gasket 61 is sleeved on the outer wall of the mounting head 40 and located on the side of the lead seal cover 63 close to the driving handle 30. The second gasket 62 is sleeved on the outer wall of the mounting head 40 and located on the other side of the lead seal cover 63 close to the mounting nut 50. At least one first hole 41 is formed on the driving handle 40, and at least one second hole 631 is formed on the side wall of the lead seal cover 63.

[0043] Referring to Figure 3 which is an exploded view of a partial structure of the mounting head assembly in the changeover switch according to an embodiment of the present application, mainly showing the handle shaft and the second sealing unit. According to an optional embodiment of the present application, the handle shaft 70 comprises a first shaft section 71 and a second shaft section 72. One end of the first shaft section 71 is connected to the driving handle 30. The second shaft section 72 is formed from the other end of the first shaft section 71, and an installation groove 721 is arranged on the second shaft section 72, in which the second sealing unit 80 is accommodated.

[0044] According to a specific embodiment of the present application, the second sealing unit 80 comprises an annular sealing ring 81. In order to further optimize the structural design, for example, according to an optional embodiment of the present application, the annular sealing ring 81 comprises an annular body 811 and a V-shaped sealing seat 812 connected above the annular body.

[0045] In order to ensure stable and reliable sealing effect, the outer circumferential dimension of the opening of the sealing seat 812 is greater than the base dimension of the sealing seat 812 connected to the annular body 811. Furthermore, the outer circumferential dimension of the opening of the sealing seat 812 is greater than the outer circumferential dimension of the annular body 811.

[0046] It is worth pointing out that the above design can effectively prevent the annular sealing ring 81 from moving up and down during use. The sealing seat 812 of the annular sealing ring 81 abuts against the lower opening of the mounting head 40, blocking the channel for the product itself to enter the product interior, and ensuring better sealing isolation effect.

[0047] For example, according to a specific embodiment of the present application, in order to enhance the sealing effect, the first gasket 61 and the second gasket 62 are substantially the same in size and symmetrically arranged at the axial position of the lead seal cover 63. In combination Figure 2 and Figure 5As shown, due to the upper and lower sealing gaskets, i.e. the first gasket 61 and the second gasket 62, of the lead seal cover 63, the channel into the product interior between the mounting head assembly 20 and the mounting plane can be effectively blocked, and the sealing performance of the product is further improved.

[0048] According to an optional embodiment of the present application, a first hole 41 is formed on the driving handle 30, and a plurality of second holes 631 are correspondingly formed on the side wall of the lead seal cover 63. Figure 4 As shown, a row of second holes 631 are formed on the corresponding outer wall of the lead seal cover 63, so as to form a lead seal mechanism with the first hole 41 on the driving handle 30, ensuring the compactness of the product structure and improving the safety performance of the product.

[0049] In summary, due to the unique design structure of the first sealing unit and the second sealing unit of the switch in the embodiments of the present application, the sealing effect of the product is more effective and reliable through the process of assembling two sealing gaskets and the V-shaped sealing seat structure, which not only ensures the operation performance of the product, but also reaches the IP65 level of the protection level. The switch of the present application greatly improves the adaptability of the product in different scenarios, especially can be widely used in extremely humid scenarios, for example, the waterproof lead seal switch of the present application is suitable for use in the humid environment of underground rail transit.

[0050] It should be noted that the relationship terms such as first and second in the present text are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0051] Finally, it should be noted that: the above is only a preferred embodiment of the present application, which is only used to illustrate the technical solutions of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application are included in the protection scope of the present application.

Claims

1. A changeover switch (100) characterized in that, The utility model relates to a switch body (10) and a mounting head assembly (20) connected to the switch body (10), wherein the mounting head assembly (20) comprises a driving handle (30), a mounting head (40) connected to the end of the driving handle (30), a mounting nut (50) connected to the outer wall of the mounting head (40), a first sealing unit (60) sleeved on the outer wall of the mounting head (40) and located between the mounting head (40) and the mounting nut (50), a handle shaft (70) arranged in the interior of the mounting head (40), one end of the handle shaft (70) being connected to the driving handle (30), and a second sealing unit (80) sleeved on the other end of the handle shaft (70) and accommodated in the inner cavity of the mounting head (40). The first sealing unit (60) comprises a lead seal cover (63) sleeved on the outer wall of the mounting head (40), a first gasket (61) sleeved on the outer wall of the mounting head (40) and located on the side of the lead seal cover (63) close to the driving handle (30), and a second gasket (62) sleeved on the outer wall of the mounting head (40) and located on the other side of the lead seal cover (63) close to the mounting nut (50). The driving handle (30) is provided with at least one first hole (41), and the side wall of the lead seal cover (63) is provided with at least one second hole (631). The handle shaft (70) comprises a first shaft section (71) having one end connected to the driving handle (30), and a second shaft section (72) formed by extending from the other end of the first shaft section (71), wherein the second shaft section (72) is provided with a mounting groove (721) in which the second sealing unit (80) is accommodated. The second sealing unit (80) comprises an annular sealing ring (81). The annular sealing ring (81) comprises an annular main body (811) and a V-shaped sealing seat (812) connected to the top of the annular main body. The outer circumferential dimension of the opening of the sealing seat (812) is greater than the base dimension of the sealing seat (812) connected to the annular main body (811). The outer circumferential dimension of the opening of the sealing seat (812) is greater than the outer circumferential dimension of the annular main body (811). The first gasket (61) and the second gasket (62) are substantially the same in size and symmetrically arranged at the axial position of the lead seal cover (63). The driving handle (30) is provided with a first hole (41), and the side wall of the lead seal cover (63) is correspondingly provided with a plurality of second holes (631).

2. The switch according to claim 1, characterized in that ​ ​ ​ ​ 3. The switch according to claim 2, characterized in that ​ 4. The switch according to claim 2, characterized in that ​ ​ ​ 5. The switch according to claim 3, characterized in that ​ 6. The switch according to claim 5, characterized in that ​ 7. The switch according to claim 6, characterized in that ​ 8. The switch according to claim 7, characterized in that ​ 9. The switch according to claim 2, characterized in that ​ 10. The switch according to claim 2, characterized in that ​

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