Three-point type operation box door lock
By setting three interlocking latches on the same edge of the control box door, the problems of poor sealing and difficulty in linkage of existing three-point door locks are solved, achieving efficient locking and sealing effects and improving the operational reliability of the combined electrical high-voltage switch.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-27
AI Technical Summary
The existing three-point door locks do not seal well on the operating box door of the combined electrical appliance high-voltage switch, and it is not easy to achieve the linkage of the three locking points, which affects the sealing effect and the efficiency of opening and closing the door.
Design a three-point control box door lock. By setting three linked lock tongues on the same side edge of the door panel, the lock tongues are rotated synchronously using a connecting rod to ensure that the door panel and the door frame fit tightly. A 45-degree chamfer is set at the front end of the lock tongue to enhance the sealing effect.
It achieves a secure locking and good sealing of the tall and narrow operating box door, improving the sealing effect and increasing the efficiency of opening and closing the door.
Smart Images
Figure CN224048874U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to combined electric appliance high voltage switch technical field, especially three point formula operating box door lock. BACKGROUND
[0002] The breaker operating mechanism of combined electric appliance high voltage switch is generally installed in the operating box, and the rainproof sealing performance of the operating box is strictly required for normal work of the components in the breaker operating box. The operating box is a box body welded by stainless steel, the sealing property of the welded part can be ensured by optimizing the welding mode, the operating box door is provided with sealing strips around, as long as the operating box door can be reliably closed, the waterproof sealing property of the operating box can be ensured. Since the vertical direction of the operating box door is relatively high and the width is relatively narrow, the previous single point or two point formula operating box door lock in the vertical direction of the side surface has the defect of not being tightly sealed, the operating box body, the sealing strip and the door are not tightly attached, the humidity in the operating box is increased or the electric components are damp, the normal operation is affected, and the components are damaged or misoperation, which affects the normal operation of the whole high voltage switch.
[0003] The existing three point formula door lock is generally provided with one point in the side door frame, one point in the top door frame and one point in the bottom door frame, but since the whole operating box door is in the style of the vertical direction being relatively high and the width being relatively narrow, the side edge of the door plate and the side door frame are very long, the existing three point formula door lock cannot ensure the sealing effect of the side surface of the door plate and the door frame, and the existing three point formula door lock needs to be opened and closed respectively, and the linkage of the three lock points is not easy to realize due to the installation position defects, and the door opening and closing operation is inconvenient. SUMMARY
[0004] In view of the above problems, the utility model provides a three point formula door lock which can provide three lock points on the side surface of the door plate, and is particularly suitable for the operating box door which is relatively high and narrow, and can realize firm locking and good sealing effect.
[0005] The technical scheme of the utility model is as follows:
[0006] A three point formula operating box door lock, including handle and middle lock tongue, the handle includes base, pivot and handle, the handle of the handle is installed in the middle position of the door plate near the edge of the door frame through the base, the pivot of the handle passes through the door plate and is fixedly connected with the middle part of the middle lock tongue, and the handle drives the middle lock tongue to rotate synchronously;It also includes the upper lock tongue above the middle lock tongue and the lower lock tongue below the middle lock tongue, the rear ends of the upper lock tongue, the middle lock tongue and the lower lock tongue are rotatably connected with the upper, middle and lower positions of the same connecting rod respectively, and linkage is formed through the connecting rod;The middle parts of the upper lock tongue and the lower lock tongue are rotatably connected with the fixed shaft on the door plate, and rotate around the fixed shaft as a fulcrum.
[0007] The utility model discloses a three lock points are arranged on the same side edge of the door plate, and the three lock points are connected through the linkage of the connecting rod, and the handle is arranged on the same side edge of the door plate, and the handle is arranged on the same side edge of the door plate.
[0008] Further, the handle rotating shaft is a prism, a through hole matching the section of the handle rotating shaft is formed in the middle of the middle lock tongue for inserting the rotating shaft, and the handle drives the middle lock tongue to rotate synchronously through the rotating shaft to realize the opening and closing of the lock.
[0009] Further, the handle of the handle is always arranged perpendicularly to the extension direction of the middle lock tongue.
[0010] Further, the distance between the axis of the fixed shaft on the door plate and the axis of the handle rotating shaft is equal to the length of the same side edge of the door frame, so that the rotating centers of the three lock tongues are on the same vertical plane, and the smooth movement of the three lock points is ensured.
[0011] Preferably, the upper lock tongue, the middle lock tongue and the lower lock tongue are Z-shaped lock tongues, so as to meet the thickness requirements of the door frame and the door of the operation box.
[0012] Preferably, the upper lock tongue, the middle lock tongue and the lower lock tongue are Z-shaped lock tongues, so as to meet the thickness requirements of the door frame and the door of the operation box.
[0013] The utility model discloses the beneficial effects are as follows:
[0014] (1) three lock points are arranged on the same side edge of the door plate, the position of the upper lock is increased, the side edge frame of the high door plate can be in close contact with the door frame, and the sealing effect is improved.
[0015] (2) the three lock tongues are connected through the connecting rod, and the rotating support point of the lock tongue is provided, the opening and closing of the three lock points can be realized when the handle is rotated, and the efficiency of opening and closing the door is improved. DRAWINGS
[0016] Figure 1 is the schematic diagram of the utility model in the state of opening the lock;
[0017] Figure 2 is the schematic diagram of the utility model after the handle is rotated by 45 degrees;
[0018] Figure 3 is the schematic diagram of the utility model in the state of closing the lock;
[0019] Figure 4 is Figure 3 is a cross-sectional view along A-A in
[0020] Figure 5 is Figure 3 is a cross-sectional view along B-B in
[0021] In the figure, 1 is an upper lock tongue, 2 is a connecting rod, 3 is a middle lock tongue, 4 is a handle, 5 is a lower lock tongue, 6 is a door panel, 7 is a door frame, 8 is a nut, 9 is a square shaft, 10 is a bolt, 11 is a sealing ring, 12 is a fixed shaft, and 13 is a base. DETAILED DESCRIPTION
[0022] The structure of the utility model will be specifically described below in combination with the drawings and embodiments.
[0023] A three-point operation box door lock, as shown in Figure 1 , 3 , comprises a door panel 6 and a door frame 7, the three-point operation box door lock is installed on the door panel 6 and used for realizing the closure and locking of the door panel and the door frame. The door lock comprises a connecting rod 2, an upper lock tongue 1, a middle lock tongue 3, a lower lock tongue 5, and a handle; the connecting rod 2 is arranged in parallel with the side edge of the door panel near the side edge of the door panel without a hinge. As shown in Figure 4 , the handle comprises a base 13, a square shaft 9, and a handle 4, the base 13 of the handle is fixed outside the middle position of the edge of the door panel, the square shaft 9 of the handle penetrates the door panel and is connected with the middle lock tongue 3 on the inner side of the door panel, the middle part of the middle lock tongue 3 is provided with a square hole matched with the square shaft for the insertion of the square shaft, and a threaded hole is formed in the end of the square shaft 9, after the square shaft penetrates the square hole, the middle lock tongue is fixed on the square shaft of the handle through the nut 8. After the handle is connected with the middle lock tongue, the handle and the middle lock tongue are always perpendicular to the extension direction of the middle lock tongue. The transmission connection of the handle and the middle lock tongue is realized through the design of the square shaft and the square hole, and then the middle lock tongue can be driven to rotate synchronously by rotating the handle of the handle, so that the unlocking and locking operations are realized.
[0024] In order to enable the three lock tongues to rotate simultaneously when the handle of the handle is rotated, the utility model connects the three lock tongues through the connecting rod to form a linkage mechanism. First, as shown in Figure 1 , 4The rear end of the middle lock tongue 3 is connected to the middle position of the connecting rod 2 through the bolt 10, and the rear end of the upper lock tongue 1 and the lower lock tongue 5 is connected to the top and bottom position of the connecting rod respectively through the bolt 10. Secondly, the fixed shaft 12 is installed on the door plate at the position corresponding to the middle part of the upper lock tongue and the lower lock tongue, as the rotating fulcrum of the upper lock tongue and the lower lock tongue, the axis of the two fixed shafts is equal to the length of the edge of the same side door frame, which ensures that the rotating center is in the same vertical plane, and the middle part of the upper lock tongue and the lower lock tongue is sleeved on the fixed shaft 12 and can rotate relative to the fixed shaft. The fixed shaft 12 has two small holes in the radial direction, which are located on both sides of the upper lock tongue / lower lock tongue sleeve position respectively, for inserting the split pin to realize the installation and positioning of the upper lock tongue / lower lock tongue.
[0025] Considering that the door plate and the door frame have a certain thickness, in order to facilitate the locking tongue to be clamped in the inner side of the door frame, the middle lock tongue 3, the upper lock tongue 1 and the lower lock tongue 5 are all Z-shaped lock tongues, one end of the Z-shaped lock tongue is used for connecting with the door plate, and the other end is used for realizing the clamping with the door frame, so as to realize the close fitting and locking of the door frame and the door plate. At the same time, the front end of the lock tongue is cut at an angle of 45° on the upper side, which plays a guiding role for the contact between the lock tongue and the inner side of the door frame when the door is closed. Further, in order to ensure the sealing effect, the sealing ring 11 is arranged on the side edge of the door frame which contacts with the door plate, so that the sealing ring on the door frame can be pressed tightly by the door plate when the door is locked, and a good sealing state is formed.
[0026] The opening and closing state of the three-point operation box door lock is as follows: Figure 1 When the handle of the handle is in the horizontal position, the door lock is in the fully open state, and the upper lock tongue, the middle lock tongue and the lower lock tongue are in the vertical retracted state. As shown in Figure 2 When the handle is rotated clockwise to the lower right 45°, the three lock tongues are in the lower left 45° position, and due to the 45° cut angle of the lock tongue, the end of the lock tongue has not contacted with the door frame, and the end of the lock tongue is in the vertical state. As shown in Figure 3 Continuing to rotate the handle clockwise, the three lock tongues gradually contact and press the door frame, so that the door plate and the door frame are tightly fitted, until the handle is turned to the vertical position, and the three-point door lock is closed in place.
Claims
1. A three-point operating box door lock, comprising a handle and a middle bolt (3), the handle comprising a base (13), a rotating shaft and a handle (4), the handle (4) of the handle being installed at a middle position of a door panel near an edge of a door frame through the base (13), the rotating shaft of the handle penetrating through the door panel and being fixedly connected with a middle part of the middle bolt, the handle driving the middle bolt to rotate synchronously; characterized in that: It also includes the upper lock tongue (1) and the lower lock tongue (5) above and below the middle lock tongue, the rear ends of the upper lock tongue (1), the middle lock tongue (3) and the lower lock tongue (5) are respectively connected with the upper, middle and lower positions of the same connecting rod (2) in rotation, linkage is formed through the connecting rod; the middle parts of the upper lock tongue and the lower lock tongue are connected with the fixed shaft (12) on the door plate in rotation, and rotate around the fixed shaft as the fulcrum.
2. The three-point operator box door lock of claim 1, wherein: The handle rotating shaft is prismatic, a through hole matching the cross section of the rotating shaft of the handle is opened on the middle part of the middle lock tongue (3) for inserting the rotating shaft; the handle drives the middle lock tongue to rotate synchronously through the rotating shaft, and unlocking and locking are realized.
3. The three-point operator box door lock of claim 2, wherein: The handle (4) of the handle is always arranged perpendicularly to the extension direction of the middle lock tongue (3).
4. The three-point operator box door lock of claim 2, wherein: The distance between the axis of the fixed shaft (12) on the door plate and the axis of the handle rotating shaft and the length of the edge of the same side door frame are equal.
5. A three-point operator box door lock according to any one of claims 1 to 4, characterized in that: The upper lock tongue (1), the middle lock tongue (3) and the lower lock tongue (5) are all Z-shaped lock tongues.
6. The three-point operator box door lock of claim 5, wherein: The front ends of the upper lock tongue (1), the middle lock tongue (3) and the lower lock tongue (5) are provided with 45-degree chamfers on the upper sides.