WO2015106671A1 - 一种防护罩旋转装配结构及具有该结构的接触器 - Google Patents

一种防护罩旋转装配结构及具有该结构的接触器 Download PDF

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Publication number
WO2015106671A1
WO2015106671A1 PCT/CN2015/070568 CN2015070568W WO2015106671A1 WO 2015106671 A1 WO2015106671 A1 WO 2015106671A1 CN 2015070568 W CN2015070568 W CN 2015070568W WO 2015106671 A1 WO2015106671 A1 WO 2015106671A1
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WO
WIPO (PCT)
Prior art keywords
wall
shield
protective cover
assembly structure
insulating barrier
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PCT/CN2015/070568
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English (en)
French (fr)
Inventor
蔡洪洲
张红伟
靳海富
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德力西电气有限公司
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Application filed by 德力西电气有限公司 filed Critical 德力西电气有限公司
Priority to BR112016009588-0A priority Critical patent/BR112016009588B1/pt
Priority to RU2016116894A priority patent/RU2640035C1/ru
Publication of WO2015106671A1 publication Critical patent/WO2015106671A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/06—Bases; Casings; Covers having windows; Transparent cases or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/0264—Protective covers for terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections

Definitions

  • the invention relates to the technical field of low-voltage electrical appliances, in particular to a protective cover rotating assembly structure and a contactor having the same.
  • a contactor is a non-manually operated mechanical switching device that can carry and frequently turn on and off a normal circuit current.
  • a contactor widely used includes a casing structure composed of a casing and a shield, and a plurality of phase-conducting conductors composed of a tile-shaped terminal screw, a contact plate, and a terminal provided in the casing structure, and currently Widely used are contactors with four-phase live conductors. Due to factors such as the inherent structure of the product and the installation space, the shield of some contactor products needs to be mounted to the housing through a rotating assembly structure.
  • a plurality of insulating walls 11 are evenly spaced apart in the housing 1, and a phase is disposed between two adjacent insulating walls 11.
  • the charging conductor has a certain gap between the charged conductor and the adjacent two insulating walls 11.
  • the protective cover 2 is of a unitary structure and is mounted above the charged conductor; the protective cover 2 is formed with a first protective wall 21 of the same number as the number of the charged conductors on the outer side of the charged conductor of each phase, It is used to prevent the user from getting an electric shock during operation and to ensure safe use.
  • a square hole 212 is formed in at least one of the first protective walls 21, and at least one inclined boss 213 is disposed on the second protective wall 23 at the top of the protective cover 2 and away from the square hole 212.
  • a boss 12 that cooperates with the square hole 212 is formed on at least one of the insulating walls 11, and a bevel groove 13 that engages with the bevel boss 213 is formed on the top of at least one of the insulating walls 11.
  • the protective cover 2 When assembling, the protective cover 2 is first placed obliquely and then rotated inwardly so that the third protective wall 24 of the protective cover 2 is inserted into the space behind the tile-shaped terminal screw 3, and the square hole 212 is Nesting onto the boss 12 of the housing 1 while the ramp boss 213 on the shield 2 snaps into the bevel groove 13 on the housing 1 Thereby the assembly of the shield and the housing is completed. After the housing 1 is assembled with the shield 2, as shown in FIG.
  • the degree of freedom of the shield 2 in the X direction depends on the A face of the bevel groove 13 and the C of the insulating barrier 11
  • the face lock is fixed, and the degree of freedom of the shield 2 in the Y direction is locked and fixed by the B face of the insulating barrier 11 and the D face of the boss 12.
  • the force position for restricting the upward movement of the shield 2 in the Y direction is matched with the D surface of the boss 12.
  • the inner wall of the square hole 212 is far from the center of the protective cover 2, and the protective cover 2 is limited by the injection molding process, and can only be processed into a thin wall feature, which makes the hole of the square hole 212 deep.
  • the effective matching surface of the inner wall of the square hole 212 and the boss 12 is smaller, almost similar to the point constraint; and the square hole 212 and the boss 12 are gap-fitted, thereby finally resulting in an effective mating surface It is a severely eccentric point constraint for the Y-direction freedom of the center of the shield 2, and the limit fixing reliability of the Y-direction upward movement is very low, resulting in the shield 2 being extremely easy to be detached from the housing 1. Loose off.
  • the rotating assembly structure of the shield is more difficult to ensure the shortest leakage path of the contactor, and the limit fixing reliability of the upward movement in the Y direction after installation is poor.
  • the technical problem to be solved by the present invention is that the prior art protective cover rotating assembly structure has low reliability of the fixed limit movement of the protective cover in the Y direction, and the contact point product is low due to the lower calculation point position of the shortest leakage path.
  • the shortest leakage path is difficult to meet the requirements, and provides a shield rotation assembly structure with high reliability of the shield fixed limit and a relatively low calculation point of the shortest leakage path, and it is easier to make the shortest leakage path meet the requirements. Structure of the contactor.
  • a protective cover rotating assembly structure for mounting a shield to a housing
  • the housing comprises a plurality of evenly spaced insulating barrier walls, and a charged conductor is disposed between two adjacent insulating barrier walls;
  • the shield includes a plurality of evenly spaced sidewalls that match the insulating barrier wall;
  • the rotating assembly structure includes a slope limiting mechanism, the slope limiting mechanism includes a first step matching inclined surface disposed on the insulating barrier wall, and is disposed on the sidewall to cooperate with the first step matching slope The second step cooperates with the slope;
  • At least one of the insulating barrier walls is formed with a step protruding from a plane of the insulating barrier wall on at least one side of the charging conductor, and a connection surface between the plane of the step and the plane of the insulating barrier wall is a step mating surface, at least a portion of the first step mating surface extends obliquely from the inside to the outside and away from the charging conductor to form the first step matching inclined surface;
  • An insulating wall is disposed on the side wall, and at least one plane of the interphase insulating wall protrudes from a plane of the sidewall, and a connecting surface of the plane between the intersecting insulating wall and the plane of the sidewall is a second step a mating surface, at least a portion of the second step mating surface extending obliquely from the inside to the outside and away from the charging conductor to form the second step matching ramp; the second step mating ramp is adapted to be A step-fitted ramp contact fit constitutes the ramp stop mechanism to limit upward movement of the shield in the Y direction after mounting to the housing.
  • the protective cover rotating assembly structure further includes a card positioning mechanism for further restricting upward movement of the protective cover in the Y direction after the housing is mounted, including
  • a card seat disposed on an upper portion of the at least one third shielding wall of the protective cover
  • the mating mating surface is a lower surface of the top plate of the casing, and cooperates with the card table to prevent the card table from coming off.
  • the card table is trapezoidal, the longer waist is disposed adjacent to the charging conductor, and the upper bottom is disposed at a position away from the first protective wall of the protective cover;
  • the mating surface cooperates with the shorter waist of the card.
  • the card table is triangular, and the edge with the smallest slope of the card is matched with the mating surface of the card table.
  • the hood rotating assembly structure further includes a bevel boss positioning mechanism, wherein the bevel boss positioning mechanism is configured to restrict an outward movement of the shield in the X direction after the casing is mounted, including
  • a bevel groove formed on top of at least one of the insulated walls
  • a beveled boss that matches the beveled groove and is disposed on the second protective wall of the top of the shield and away from the position of the first protective wall of the shield.
  • the inclined groove and the inclined boss are matched trapezoids, and the longer waist is disposed adjacent to the first protective wall.
  • the inclined groove and the inclined surface boss are matched triangles.
  • a contactor employing the above-described shield rotation assembly structure includes a housing and a shield mounted to the housing by the rotary mounting structure.
  • the insulating barrier wall is formed with a notch structure on the outer edge and near the shield mounting position to form a line crawling along the outermost end of the edge of the charged conductor and crawling along the surface of the insulating wall And then folding along the surface of the first protective wall or the insulating barrier wall of the shield to crawl to the shortest leakage path of the notch corner of the notch structure.
  • the rotary assembly structure further includes a bevel boss positioning mechanism and a card positioning mechanism.
  • the protective cover rotating assembly structure provided by the present invention comprises a slope limiting mechanism, and the cooperation of the second step matching inclined surface and the first step matching inclined surface restricts the upward movement of the protective cover in the Y direction after the mounting to the housing.
  • the force position for restricting the upward movement of the shield in the Y direction is on the first step matching inclined surface of the insulating barrier wall of the housing, and the first step is matched with the inclined surface.
  • the protective cover rotating assembly structure provided by the present invention further includes a card positioning mechanism for further restricting the upward movement of the shield in the Y direction and the rotation from the inside to the outside, including the card table and the card table.
  • the mating surface has a simple structure, is easy to process, and is easy to operate.
  • the protective cover rotating assembly structure provided by the present invention further includes a bevel boss positioning mechanism for restricting the outward movement of the shield in the X direction after the mounting to the housing, so that the fixing of the protective cover is more stable and reliable.
  • the contactor provided by the present invention has the rotary assembly structure of the present invention, and the shield can be reliably and stably mounted to the casing to form a stable and reliable fit and good phase-to-phase insulation performance, and the existing casing is eliminated.
  • the boss and the square hole on the shield and the notch structure are designed to increase the calculation point of the shortest leakage path of the casing, which makes it easier to make the shortest leakage path meet the product requirements, which is advantageous for the miniaturization of the product.
  • Figure 1 is a side cross-sectional view of a prior art contactor housing
  • Figure 2 is a side cross-sectional view of a prior art contactor shield
  • FIG. 3 is a schematic view of the prior art contactor housing and the protective cover
  • Figure 4 is a side cross-sectional view of the contactor housing of the present invention.
  • Figure 5 is a side cross-sectional view of the contactor shield of the present invention.
  • Figure 6 is a perspective view of the contactor cover of the present invention.
  • Figure 7 is a perspective view 2 of the contactor cover of the present invention.
  • Figure 8 is a schematic view of the front housing and related components of the contactor housing and the shield assembly of the present invention.
  • Figure 9 is a first schematic view showing the process of fitting the contactor housing and the protective cover in the present invention.
  • Figure 10 is a second schematic view showing the process of fitting the contactor housing and the protective cover in the present invention.
  • Figure 11 is a schematic view of the contactor housing and the protective cover of the present invention.
  • 6-phase insulating wall 61-second step mating surface, 611-second step mating bevel;
  • the shield rotation assembly of the present invention is used to mount the shield 2 to the housing 1, as shown in Figures 4 and 5.
  • the housing 1 includes a plurality of evenly spaced insulating barrier walls 11 , and a phase charging conductor is disposed between the two adjacent insulating barrier walls 11 , between the charging conductor and the adjacent two insulating walls 11 . Leave a certain gap.
  • the contactor in this embodiment is a contactor having a four-phase live conductor; the live conductor includes a tile-shaped terminal screw 3, a contact plate 4, and a wire.
  • the protective cover 2 is of a unitary structure and is mounted above the charged conductor; and includes a plurality of evenly spaced side walls 22 matched with the insulating barrier wall 11 on the outer side of the charged conductor of each phase.
  • the protective cover 2 is formed with a first protective wall 21 of the same number as the number of the charged conductors for preventing the user from being shocked during operation and ensuring safe use.
  • the first protective wall 21 is formed with a plurality of slots 211 adapted to be inserted into the insulating barrier wall 11.
  • the top of the protective cover 2 is a third protective wall 23, and the first protective wall 21 and the third protective wall 23 are integrally connected by a connecting plate 26, and the connecting plate 26 can be rounded. Plate or inverted panel.
  • the rotating assembly structure includes a slope limiting mechanism, a card positioning mechanism, and a bevel boss positioning mechanism.
  • the inclined surface limiting mechanism includes a first step matching inclined surface 511 disposed on the insulating barrier wall 11 and a second step matching inclined surface 611 disposed on the sidewall 22 to cooperate with the first step matching inclined surface 511.
  • the first step mating ramp 511 and the second step mating ramp 611 are planes having a certain width and length.
  • At least one of the insulating barrier walls 11 is formed with a step 5 protruding from a plane of the insulating barrier wall 11 on at least one side surface adjacent to the charging conductor, the plane of the step 5 and the plane of the insulating barrier wall 11
  • the connecting surface is a first step mating surface 51, and at least a portion of the first step mating surface 51 extends obliquely from the inside to the outside and away from the charging conductor to form the first step mating ramp 511.
  • the side wall 22 is provided with an inter-phase insulating wall 6 at least one of the planes of the interphase insulating walls 6 protruding from the plane of the side wall 22, and the plane of the interphase insulating wall 6 is
  • the connecting surface of the plane of the side wall 22 is a second step mating surface 61, and at least a portion of the second step mating surface 61 extends obliquely from the inside to the outside and away from the charging conductor to form the second step. Fit the slope 611.
  • the second step matching inclined surface 611 is adapted to be in contact with the first step matching inclined surface 511 to form the inclined surface limiting mechanism, and restrict the upward movement of the protective cover 2 in the Y direction after the housing 1 is mounted.
  • the card positioning mechanism is for further restricting upward movement of the shield 2 in the Y direction after the housing 1 is mounted.
  • the card table positioning mechanism includes a card table 25 and a card mating surface 15, and the card table 25 is disposed on an upper portion of the at least one third shielding wall 24 of the shield 2, in the embodiment, the card table 25 is Trapezoidal, its longer The waist is disposed adjacent to the live conductor, and the upper bottom is disposed at a position away from the first protective wall 21 of the shield 2.
  • the card mating surface 15 is a lower surface of the top plate of the casing 1 and is engaged with a shorter waist of the card table 25.
  • the card table 25 is a right-angled trapezoid.
  • the boss positioning mechanism is configured to restrict outward movement of the shield 2 in the X direction after the housing 1 is mounted, and the ramp boss positioning mechanism includes a bevel groove 13 and a bevel boss 213.
  • the bevel groove 13 is formed on the top of at least one of the insulating walls 11; the bevel boss 213 is matched with the bevel groove 13 and disposed on the second protective wall 23 at the top of the shield 2 and Far from the position of the first protective wall 21 of the shield 2.
  • the bevel groove 13 and the bevel boss 213 are matched trapezoids, and the longer waist is disposed adjacent to the first protective wall 21.
  • the bevel groove 13 and the bevel boss 213 are rectangular trapezoids.
  • the contactor of the present invention having the above-described shield rotating assembly structure includes the housing 1 and a shield 2 mounted to the housing 1 by the rotating assembly structure.
  • the insulating barrier wall 11 of the housing 1 is formed with a notch structure 7 on the outer edge and near the shield mounting position to form an outermost end position of the edge of the charging conductor, along the phase
  • the surface of the insulating wall 22 crawls straight and then is folded toward the surface of the first protective wall 21 or the insulating barrier 11 of the shield 2 to crawl to the notched corner 71 of the notch structure 7.
  • the shortest leakage path is provided.
  • the upper surface of the shoe-shaped terminal screw 3 and the face I of the shield 2, the face F of the casing 1 and the face II of the shield 2 The first step matching inclined surface 511 of the casing 1 and the surface III of the protective cover 2 are required to avoid assembly interference, and the surface E of the casing 1 and the surface a of the protective cover 2 are In the assembled assembly, the card mating surface 15 of the housing 1 and the surface b of the shield 2 are assembled to form the card positioning mechanism.
  • the process of mounting the shield 2 to the casing 1 is as shown in FIGS. 9-11.
  • the shield 2 is placed obliquely before assembly and then rotated inward (ie, the direction indicated by N in FIG. 10). Inserting the third protective wall 24 of the shield 2 into the space behind the tile-shaped terminal screw 3, and pushing the shield 2 inward (ie, the direction indicated by M in FIG. 10), so that The second step matching inclined surface 611 abuts against the first step matching inclined surface 511, so that the card table 25 is engaged with the card mating surface 15, and the protective cover 2 is installed.
  • the degree of freedom of the shield 2 in the X direction is locked and fixed by the G face of the bevel groove 12 and the J face of the insulating barrier wall 11, and the shield 2 is free in the Y direction.
  • the degree is locked and fixed by the H surface and the I surface of the insulating barrier wall 11 (ie, the first step matching inclined surface 511).
  • the cooperation of the K-face (ie, the mating surface 15 of the card) with the card table 25 further strengthens the outward direction of the shield 2 (ie, clockwise in FIG. 11) Direction) the constraint of rotation.
  • the shortest leakage path S2 from the outermost edge position of the live conductor of the tile-shaped terminal screw 3 to the notch corner point 71 of the casing 1 is longer than in the prior art.
  • the card table 25 can also be triangular, with the least sloped side of the card table 25 mating with the card mating surface 15.
  • the beveled groove 13 and the beveled boss 213 may also be matched triangles.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Breakers (AREA)
  • Casings For Electric Apparatus (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Abstract

一种防护罩旋转装配结构及具有该结构的接触器，旋转装配结构用于将防护罩(2)安装到壳体(1)上，包括斜面限位机构，该斜面限位机构包括设置于绝缘挡壁(11)上的第一台阶配合斜面(511)以及设置于侧壁(22)上与该第一台阶配合斜面(511)配合的第二台阶配合斜面(611)，用于限制防护罩(2)安装到壳体(1)后的Y方向向上运动。该旋转装配结构对防护罩固定限位的可靠性高，该接触器最短漏电路径计算点位置较高，更容易使最短漏电路径满足产品要求。

Description

一种防护罩旋转装配结构及具有该结构的接触器 技术领域
本发明涉及低压电器技术领域，尤其是一种防护罩旋转装配结构及具有该结构的接触器。
背景技术
接触器是指能承载和频繁地接通、分断正常电路电流的非手动操作的机械开关电器。随着低压电器领域的快速发展，市场对接触器产品的小型化、个性化以及绝缘性能提出了更高的要求。
目前，广泛应用的一种接触器，包括由壳体和防护罩组成的外壳结构以及设于所述外壳结构内的由瓦形接线螺钉、接触板和接线端子等组成的若干相带电导体，目前广泛应用的是具有四相带电导体的接触器。受产品固有结构和安装空间等因素影响，部分接触器产品的防护罩需要通过旋转装配结构安装到壳体上。
现有的一种防护罩旋转装配结构，如图1-3所示，在壳体1中设有均匀间隔设置的若干个绝缘墙壁11，相邻两个所述绝缘墙壁11之间设有一相带电导体，所述带电导体与相邻的两所述绝缘墙壁11之间留有一定的间隙。防护罩2为整体结构，安装于所述带电导体的上方；在每相所述带电导体的朝外侧，所述防护罩2成型有数量与所述带电导体数量相同的第一防护用墙壁21，用于防止使用者在操作时触电，保证使用安全。在至少一个所述第一防护用墙壁21上成型有方孔212，在所述防护罩2顶部的第二防护用墙壁23上且远离所述方孔212的位置设置有至少一个斜面凸台213。在至少一个所述绝缘墙壁11上成型有与所述方孔212配合的凸台12，且在至少一个所述绝缘墙壁11的顶部成型有与所述斜面凸台213配合的斜面凹槽13。
在装配时，先将所述防护罩2倾斜放置，然后向内旋转，使所述防护罩2的第三防护用壁24插入瓦形接线螺钉3后方的空隙中，并将所述方孔212套入到所述壳体1的所述凸台12上，与此同时，所述防护罩2上的所述斜面凸台213卡入所述壳体1上的所述斜面凹槽13中，从而完成了防护罩与壳体的装配。所述壳体1与所述防护罩2装配好之后如图3所示，所述防护罩2在X方向的自由度依靠所述斜面凹槽13的A面和所述绝缘挡壁11的C面锁紧固定，而所述防护罩2在Y方向的自由度依靠所述绝缘挡壁11的B面和所述凸台12的D面锁紧固定。
然而，上述装配结构在使用过程中存在以下问题：
①该现有技术中，如图3所示，由于所述壳体1的所述绝缘挡壁11上成型有所述凸台12，迫使所述绝缘挡壁11上位于所述凸台12下方的、作为所述壳体1的最短漏电路径(即爬电距离)计算点位置，即拐角14的位置偏低，导致自所述瓦形接线螺钉3的带电导体最外边缘位置到所述壳体1的所述拐角13位置的最短漏电路径S1较短，使得这种接触器的最短漏电路径难以保证，存在安全隐患。
②该现有技术中，由于所述方孔212与所述凸台12配合后，用于限制防护罩2在Y方向向上运动的作用力位置在与所述凸台12的D面配合的所述方孔212内壁上，离所述防护罩2的中心较远，而且所述防护罩2受到注塑加工工艺的限制，只能加工成薄壁特征，这就使得所述方孔212的孔深较小，所述方孔212内壁与所述凸台12的有效配合面较小，几乎近似于点约束；而且所述方孔212与所述凸台12为间隙配合，从而最终导致有效配合面相对于所述防护罩2中心的Y方向自由度来说是一个严重偏心的点约束，Y方向向上运动的限位固定可靠性非常低，导致所述防护罩2极容易从所述壳体1上松动脱落。
综上所述，现有技术中防护罩旋转装配结构较难以保证接触器的最短漏电路径，而且安装后Y方向向上运动的限位固定可靠性差。
发明内容
为此，本发明所要解决的技术问题在于现有技术的防护罩旋转装配结构对防护罩Y方向向上运动的固定限位可靠性低，且由于最短漏电路径计算点位置较低，导致接触器产品的最短漏电路径难以满足要求的问题，提供一种对防护罩固定限位可靠性高，且最短漏电路径计算点位置较高，更容易使最短漏电路径满足要求的防护罩旋转装配结构及具有该结构的接触器。
为解决上述技术问题，本发明采用的技术方案如下：
一种防护罩旋转装配结构，用于将防护罩安装到壳体上；
所述壳体包括若干个均匀间隔设置的绝缘挡壁，相邻两所述绝缘挡壁之间设置带电导体；
所述防护罩包括与所述绝缘挡壁匹配的若干个均匀间隔设置的侧壁；
所述旋转装配结构包括斜面限位机构，所述斜面限位机构包括设置于所述绝缘挡壁上的第一台阶配合斜面以及设置于所述侧壁上与所述第一台阶配合斜面配合的第二台阶配合斜面；
至少一个所述绝缘挡壁在靠近所述带电导体的至少一个侧面上成型有突出于所述绝缘挡壁所在平面的台阶，所述台阶所在平面与所述绝缘挡壁所在平面的连接面为第一台阶配合面，所述第一台阶配合面至少其中一部分自内向外并朝远离所述带电导体的方向倾斜延伸，形成所述第一台阶配合斜面；
所述侧壁上设置有相间绝缘墙壁，至少一个所述相间绝缘墙壁所在平面突出于所述侧壁所在平面，所述相间绝缘墙壁所在平面与所述侧壁所在平面的连接面为第二台阶配合面，所述第二台阶配合面至少其中一部分自内向外并朝远离所述带电导体的方向倾斜延伸，形成所述第二台阶配合斜面；所述第二台阶配合斜面适于与所述第一台阶配合斜面接触配合构成所述斜面限位机构，限制所述防护罩安装到所述壳体后的Y方向向上运动。
上述防护罩旋转装配结构中，还包括卡台定位机构，用于进一步限制所述防护罩安装到所述壳体后的Y方向向上运动，包括，
卡台，设置于所述防护罩的至少一个第三防护用壁的上部；
卡台配合面，为所述壳体顶板的下表面，与所述卡台配合，阻止所述卡台脱出。
上述防护罩旋转装配结构中，所述卡台为梯形，其较长的腰靠近所述带电导体设置，其上底设置于远离所述防护罩的第一防护用墙壁的位置；所述卡台配合面与所述卡台较短的腰配合。
上述防护罩旋转装配结构中，所述卡台为三角形，所述卡台坡度最小的边与所述卡台配合面配合。
上述防护罩旋转装配结构中，还包括斜面凸台定位机构，所述斜面凸台定位机构用于限制所述防护罩安装到所述壳体后的X方向向外运动，包括，
斜面凹槽，成型在至少一个所述绝缘墙壁的顶部；
斜面凸台，与所述斜面凹槽匹配，设置于所述防护罩顶部的第二防护用墙壁上且远离所述防护罩的第一防护用墙壁的位置。
上述防护罩旋转装配结构中，所述斜面凹槽和所述斜面凸台为匹配的梯形，其较长的腰靠近所述第一防护用墙壁设置。
上述防护罩旋转装配结构中，所述斜面凹槽和所述斜面凸台为匹配的三角形。
一种采用上述防护罩旋转装配结构的接触器，包括壳体和通过所述旋转装配结构安装到所述壳体上的防护罩。
上述接触器中，所述绝缘挡壁朝向外侧的边缘上且靠近防护罩安装位置处成型有缺口结构，以形成由所述带电导体的边缘最外端位置开始，沿着相间绝缘墙壁表面直线爬行，然后折向沿着所述防护罩的第一防护用墙壁或所述绝缘挡壁的表面，进而爬行至所述缺口结构的缺口角点的最短漏电路径。
上述接触器中，所述旋转装配结构还包括斜面凸台定位机构和卡台定位机构。
本发明的上述技术方案相比现有技术具有以下优点：
(1)本发明提供的防护罩旋转装配结构，包括斜面限位机构，通过第二台阶配合斜面与第一台阶配合斜面的配合限制防护罩安装到壳体后的Y方向向上运动。第二台阶配合斜面与第一台阶配合斜面配合后，用于限制防护罩在Y方向向上运动的作用力位置在壳体绝缘挡壁的第一台阶配合斜面上，由于第一台阶配合斜面是具有一定宽度和长度的面，对防护罩中心的Y方向自由度来说形成面约束，能够限制防护罩Y方向向上的移动和向内的转动，可靠稳定，提高产品质量。
(2)本发明提供的防护罩旋转装配结构，还包括卡台定位机构，用于进一步限制防护罩安装到壳体后的Y方向向上运动和由里向外的转动，包括卡台和卡台配合面，结构简单，易于加工实现，操作也很简便。
(3)本发明提供的防护罩旋转装配结构，其中卡台为三角形或梯形，优选为直角三角形或直角梯形，其坡度最小的边或腰边能可靠与卡台配合面贴合，使限位更加稳固。
(4)本发明提供的防护罩旋转装配结构，还包括斜面凸台定位机构用于限制所述防护安装到壳体后的X方向向外运动，使得防护罩的固定更加稳定可靠。
(5)本发明提供的接触器，具有本发明的旋转装配结构，防护罩能够可靠稳定的安装到壳体上，形成稳定可靠的配合和良好的相间绝缘性能，而且取消了现有壳体上的凸台和防护罩上的方孔，并设计了缺口结构，增高了壳体的最短漏电路径的计算点，能更容易使证最短漏电路径满足产品要求，利于产品的小型化设计。
附图说明
为了使本发明的内容更容易被清楚的理解，下面根据本发明的具体实施例并结合附图，对本发明作进一步详细的说明，其中
图1是现有技术中接触器壳体的侧面剖视图；
图2是现有技术中接触器防护罩的侧面剖视图；
图3是现有技术中接触器壳体与防护罩配合安装后的示意图；
图4是本发明中接触器壳体的侧面剖视图；
图5是本发明中接触器防护罩的侧面剖视图；
图6是本发明中接触器防护罩的立体示意图一；
图7是本发明中接触器防护罩的立体示意图二；
图8是本发明中接触器壳体与防护罩装配前壳体及相关部件的示意图；
图9是本发明中接触器壳体与防护罩配合安装过程的示意图一；
图10是本发明中接触器壳体与防护罩配合安装过程的示意图二；
图11是本发明中接触器壳体与防护罩配合安装后的示意图。
图中附图标记表示为：
1-壳体、11-绝缘挡壁、12-凸台，13-斜面凹槽，14-拐角，15-卡台配合面；
2-防护罩，21-第一防护用墙壁、211-插槽、212-方孔，213-斜面凸台，22-侧壁，23-第二防护用墙壁，24-第三防护用壁、25-卡台，26-连接板；
3-瓦形接线螺钉；
4-接触板；
5-台阶、51-第一台阶配合面，511-第一台阶配合斜面；
6-相间绝缘墙壁，61-第二台阶配合面，611-第二台阶配合斜面；
7-缺口结构，71-缺口角点。
具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
本发明的防护罩旋转装配结构，用于将防护罩2安装到壳体1上，如图4和5所示。
所述壳体1包括若干个均匀间隔设置的绝缘挡壁11，相邻两所述绝缘挡壁11之间设置一相带电导体，所述带电导体与相邻的两所述绝缘墙壁11之间留有一定的间隙。本实施例中的接触器为具有四相带电导体的接触器；所述带电导体包括瓦形接线螺钉3、接触板4和导线等组成。
所述防护罩2为整体结构，安装于所述带电导体的上方；包括与所述绝缘挡壁11匹配的若干个均匀间隔设置的侧壁22，在每相所述带电导体的朝外侧，所述防护罩2成型有数量与所述带电导体数量相同的第一防护用墙壁21，用于防止使用者在操作时触电，保证使用安全。所述第一防护用墙壁21上成型有若干适于所述绝缘挡壁11插入的插槽211。所述防护罩2的顶部为第三防护用壁23，所述第一防护用壁21与所述第三防护用壁23通过连接板26连接为一体，所述连接板26可为倒圆角板或倒斜面板。
在本实施例中，所述旋转装配结构包括斜面限位机构、卡台定位机构和斜面凸台定位机构。
所述斜面限位机构包括设置于所述绝缘挡壁11上的第一台阶配合斜面511以及设置于所述侧壁22上与所述第一台阶配合斜面511配合的第二台阶配合斜面611，所述第一台阶配合斜面511和所述第二台阶配合斜面611为具有一定宽度和长度的平面。
至少一个所述绝缘挡壁11在靠近所述带电导体的至少一个侧面上成型有突出于所述绝缘挡壁11所在平面的台阶5，所述台阶5所在平面与所述绝缘挡壁11所在平面的连接面为第一台阶配合面51，所述第一台阶配合面51至少其中一部分自内向外并朝远离所述带电导体的方向倾斜延伸，形成所述第一台阶配合斜面511。
如图6和7所示，所述侧壁22上设置有相间绝缘墙壁6，至少一个所述相间绝缘墙壁6所在平面突出于所述侧壁22所在平面，所述相间绝缘墙壁6所在平面与所述侧壁22所在平面的连接面为第二台阶配合面61，所述第二台阶配合面61至少其中一部分自内向外并朝远离所述带电导体的方向倾斜延伸，形成所述第二台阶配合斜面611。所述第二台阶配合斜面611适于与所述第一台阶配合斜面511接触配合构成所述斜面限位机构，限制所述防护罩2安装到所述壳体1后的Y方向向上运动。
所述卡台定位机构用于进一步限制所述防护罩2安装到所述壳体1后的Y方向向上运动。所述卡台定位机构包括卡台25和卡台配合面15，卡台25设置于所述防护罩2的至少一个第三防护用壁24的上部，在本实施例中所述卡台25为梯形，其较长的 腰靠近所述带电导体设置，其上底设置于远离所述防护罩2的第一防护用墙壁21的位置。所述卡台配合面15为所述壳体1顶板的下表面，与所述卡台25较短的腰配合。在本实施例中，所述卡台25为直角梯形。
所述凸台定位机构用于限制所述防护罩2安装到所述壳体1后的X方向向外运动，所述斜面凸台定位机构包括斜面凹槽13和斜面凸台213。所述斜面凹槽13成型在至少一个所述绝缘墙壁11的顶部；所述斜面凸台213与所述斜面凹槽13匹配，设置于所述防护罩2顶部的第二防护用墙壁23上且远离所述防护罩2的所述第一防护用墙壁21的位置。
在本实施例中，所述斜面凹槽13和所述斜面凸台213为匹配的梯形，其较长的腰靠近所述第一防护用墙壁21设置。优选地，所述斜面凹槽13和所述斜面凸台213为直角梯形。
本发明具有上述防护罩旋转装配结构的接触器，包括所述壳体1和通过所述旋转装配结构安装到所述壳体1上的防护罩2。所述壳体1的所述绝缘挡壁11朝向外侧的边缘上且靠近防护罩安装位置处成型有缺口结构7，以形成由所述带电导体的边缘最外端位置开始，沿着所述相间绝缘墙壁22表面直线爬行，然后折向沿着所述防护罩2的所述第一防护用墙壁21或所述绝缘挡壁11的表面，进而爬行至所述缺口结构7的缺口角点71的最短漏电路径。
如图5和图8所示，在装配之前，所述瓦形接线螺钉3的上表面和所述防护罩2的面I、所述壳体1的面F和所述防护罩2的面II、所述壳体1的所述第一台阶配合斜面511和所述防护罩2的面III均需避免装配干涉，而所述壳体1的面E和所述防护罩2的面a是过盈装配，所述壳体1的所述卡台配合面15和所述防护罩2的面b装配后形成所述卡台定位机构。
将所述防护罩2安装到所述壳体1上的过程如图9-11所示，装配时先将所述防护罩2倾斜放置，然后向内旋转(即图10中N所示方向)，使所述防护罩2的所述第三防护用壁24插入所述瓦形接线螺钉3后方的空隙中，并向内(即图10中M所示方向)推所述防护罩2，使所述第二台阶配合斜面611抵住所述第一台阶配合斜面511，进而使所述卡台25卡入所述卡台配合面15，至此所述防护罩2安装完毕。
装配完毕后，所述防护罩2在X方向的自由度依靠所述斜面凹槽12的G面和所述绝缘挡壁11的J面锁紧固定，而所述防护罩2在Y方向的自由度依靠所述绝缘挡壁11的H面和I面(即所述第一台阶配合斜面511)锁紧固定。而，K面(即所述卡台配合面15)与所述卡台25的配合进一步加强了对防护罩2向外(即图11中的顺时针 方向)转动的约束。装配后，自所述瓦形接线螺钉3的带电导体最外边缘位置到所述壳体1的所述缺口角点71位置的最短漏电路径S2与现有技术相比较长。
在其他实施例中，卡台25还可为三角形，所述卡台25坡度最小的边与卡台配合面15配合。同样，斜面凹槽13和斜面凸台213也可为匹配的三角形。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims (10)

  1. 一种防护罩旋转装配结构，用于将防护罩(2)安装到壳体(1)上；
    所述壳体(1)包括若干个均匀间隔设置的绝缘挡壁(11)，相邻两所述绝缘挡壁(11)之间设置带电导体；
    所述防护罩(2)包括与所述绝缘挡壁(11)匹配的若干个均匀间隔设置的侧壁(22)；
    其特征在于：所述旋转装配结构包括斜面限位机构，所述斜面限位机构包括设置于所述绝缘挡壁(11)上的第一台阶配合斜面(511)以及设置于所述侧壁(22)上与所述第一台阶配合斜面(511)配合的第二台阶配合斜面(611)；
    至少一个所述绝缘挡壁(11)在靠近所述带电导体的至少一个侧面上成型有突出于所述绝缘挡壁(11)所在平面的台阶(5)，所述台阶(5)所在平面与所述绝缘挡壁(11)所在平面的连接面为第一台阶配合面(51)，所述第一台阶配合面(51)至少其中一部分自内向外并朝远离所述带电导体的方向倾斜延伸，形成所述第一台阶配合斜面(511)；
    所述侧壁(22)上设置有相间绝缘墙壁(6)，至少一个所述相间绝缘墙壁(6)所在平面突出于所述侧壁(22)所在平面，所述相间绝缘墙壁(6)所在平面与所述侧壁(22)所在平面的连接面为第二台阶配合面(61)，所述第二台阶配合面(61)至少其中一部分自内向外并朝远离所述带电导体的方向倾斜延伸，形成所述第二台阶配合斜面(611)；所述第二台阶配合斜面(611)适于与所述第一台阶配合斜面(511)接触配合构成所述斜面限位机构，限制所述防护罩(2)安装到所述壳体(1)后的Y方向向上运动。
  2. 根据权利要求1所述的防护罩旋转装配结构，其特征在于：还包括卡台定位机构，用于进一步限制所述防护罩(2)安装到所述壳体(1)后的Y方向向上运动，包括，
    卡台(25)，设置于所述防护罩(2)的至少一个第三防护用壁(24)的上部；
    卡台配合面(15)，为所述壳体(1)顶板的下表面，与所述卡台(25)配合，阻止所述卡台(25)脱出。
  3. 根据权利要求2所述的防护罩旋转装配结构，其特征在于：所述卡台(25)为梯形，其较长的腰靠近所述带电导体设置，其上底设置于远离所述防护罩(2)的第一防护用墙壁(21)的位置；所述卡台配合面(15)与所述卡台(25)较短的腰配合。
  4. 根据权利要求2所述的防护罩旋转装配结构，其特征在于：所述卡台(25)为三角形，所述卡台(25)坡度最小的边与所述卡台配合面(15)配合。
  5. 根据权利要求1-4任一所述的防护罩旋转装配结构，其特征在于：还包括斜面凸台定位机构，所述斜面凸台定位机构用于限制所述防护罩(2)安装到所述壳体(1)后的X方向向外运动，包括，
    斜面凹槽(13)，成型在至少一个所述绝缘墙壁(11)的顶部；
    斜面凸台(213)，与所述斜面凹槽(13)匹配，设置于所述防护罩(2)顶部的第二防护用墙壁(23)上且远离所述防护罩(2)的第一防护用墙壁(21)的位置。
  6. 根据权利要求5所述的防护罩旋转装配结构，其特征在于：所述斜面凹槽(13)和所述斜面凸台(213)为匹配的梯形，其较长的腰靠近所述第一防护用墙壁(21)设置。
  7. 根据权利要求5所述的防护罩旋转装配结构，其特征在于：所述斜面凹槽(13)和所述斜面凸台(213)为匹配的三角形。
  8. 一种采用上述权利要求1-7任一所述防护罩旋转装配结构的接触器，其特征在于：包括壳体(1)和通过所述旋转装配结构安装到所述壳体(1)上的防护罩(2)。
  9. 根据权利要求8所述的接触器，其特征在于：所述绝缘挡壁(11)朝向外侧的边缘上且靠近防护罩安装位置处成型有缺口结构(7)，以形成由所述带电导体的边缘最外端位置开始，沿着相间绝缘墙壁(22)表面直线爬行，然后折向沿着所述防护罩(2)的第一防护用墙壁(21)或所述绝缘挡壁(11)的表面，进而爬行至所述缺口结构(7)的缺口角点(71)的最短漏电路径。
  10. 根据权利要求8或9所述的接触器，其特征在于：所述旋转装配结构还包括斜面凸台定位机构和卡台定位机构。
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