Self-locking waterproof cable box structure for pump

Abstract

The application relates to the technical field of wire box structures, and discloses a self-locking waterproof wire box structure for a pump, which comprises a wire box body used for sealingly containing cables; the wire box body comprises a wire box lower cover used for internally placing the cables; and a wire box inner upper cover is installed on the wire box lower cover. The self-locking waterproof wire box structure for a pump provided by the application divides the wire box upper cover in the prior art into a wire box inner upper cover and a wire box outer upper cover, the wire box inner upper cover is first fixed on the wire box lower cover through screws, then the wire box outer upper cover is covered above the wire box inner upper cover, the wire box inner upper cover and the wire box outer upper cover are locked through a self-locking structure, the screw hole of the screw is covered in the wire box outer upper cover, the problem that the overall appearance integrity of the wire box structure is damaged due to the exposure of the screw in the prior art is solved, and since the upper box label is attached to the outer surface of the wire box outer upper cover, the screw position is not affected, and the effect of improving the overall appearance integrity of the wire box structure is achieved.

Description

Technical Field

[0001] This application relates to the field of pump technology, and in particular to a self-locking waterproof junction box structure for pumps. Background Technology

[0002] A water pump is a machine that transports or pressurizes liquids. It transfers the mechanical energy of a prime mover or other external energy to the liquid, increasing the liquid's energy. It is mainly used to transport liquids including water, oil, acids and alkalis, emulsions, suspensions, and liquid metals. During the installation of a water pump, a junction box is used to connect to the power supply. However, current junction boxes have poor sealing performance, resulting in poor waterproofing and allowing water to easily enter, causing short circuits. Therefore, we propose a waterproof sealing structure for the pump's junction box.

[0003] Pump junction box structures need to be waterproof to prevent water from entering and causing damage. Existing junction box structures generally consist of a top cover and a bottom cover, which are typically fixed together with screws. The screw holes on the top cover are often covered with rubber or labels. Using rubber covers compromises the overall appearance of the product; using labels, while maintaining the integrity, restricts screw placement and affects the secure fixing of the top and bottom covers. This invention proposes a self-locking waterproof junction box structure for pumps, achieving a seamless fit between the top and bottom covers and ensuring the overall appearance of the product remains intact. Summary of the Invention

[0004] This application proposes a self-locking waterproof junction box structure for pumps, which has the advantages of improving the overall appearance of the junction box structure and being unaffected, thereby solving the problem of exposed screw holes on the junction box cover, which damages the overall appearance of the junction box structure.

[0005] To achieve the above objectives, this application adopts the following technical solution: a self-locking waterproof junction box structure for pumps, comprising:

[0006] The junction box body is used to seal and hold cables; the junction box body includes:

[0007] The bottom cover of the junction box houses the cables.

[0008] The inner top cover of the junction box is installed on the lower cover of the junction box, and the inner top cover of the junction box is sealed to the lower cover of the junction box through a sealing element.

[0009] The outer top cover of the junction box is placed above the inner top cover of the junction box and connected to the inner top cover of the junction box.

[0010] A self-locking structure is provided on the inner top cover and the outer top cover of the wire box for connecting the inner top cover and the outer top cover of the wire box; the self-locking structure includes:

[0011] The top-mounted mechanism is used to apply an upward thrust to the outer top cover of the junction box.

[0012] The pull-down mechanism is used to apply a downward pulling force to the outer top cover of the junction box.

[0013] Furthermore, it also includes:

[0014] The top label is placed on the top surface of the outer cover of the junction box to indicate information.

[0015] Screws are used to secure the upper and lower covers of the junction box.

[0016] Furthermore, the sealing element provided between the upper cover and the lower cover of the junction box includes:

[0017] The soft rubber is placed between the contact surfaces of the upper and lower covers inside the junction box.

[0018] Hard plastic, fitted onto the outer periphery of the bottom of the upper cover inside the wire box.

[0019] Furthermore, the upper mechanism of the self-locking structure includes:

[0020] The first self-locking feature is located on the top surface of the inner cover of the junction box. The first self-locking feature is a groove formed by the inner cover of the junction box being recessed downwards.

[0021] The second self-locking feature is located on the bottom surface of the outer cover of the junction box. The second self-locking feature is plate-shaped or column-shaped. The position and shape of the second self-locking feature match the first self-locking feature. The second self-locking feature is inserted into the first self-locking feature. The length of the second self-locking feature is greater than the depth of the first self-locking feature.

[0022] Furthermore, the pull-down mechanism includes:

[0023] The pull-down self-locking feature one is set on the top surface of the inner cover of the junction box. The pull-down self-locking feature one is in the shape of a vertically upward column or plate, and the top of the pull-down self-locking feature one is provided with a hook.

[0024] The second pull-down self-locking feature is located on the bottom surface of the outer cover of the junction box. The second pull-down self-locking feature has a hook platform that matches the top hook of the first pull-down self-locking feature. The hook of the first pull-down self-locking feature is engaged with the hook platform of the second pull-down self-locking feature.

[0025] Furthermore, both the pull-down self-locking feature one and the pull-down self-locking feature two are elastic, and the contact surfaces of the top hook of the pull-down self-locking feature one and the hook platform of the pull-down self-locking feature two are both planar and parallel to the horizontal plane.

[0026] Furthermore, the locking positions of the pull-down self-locking feature one and the pull-down self-locking feature two, and the insertion positions of the top self-locking feature one and the top self-locking feature two, satisfy the following condition: when the outer top cover of the cable box is closed above the inner top cover of the cable box, the locking of the pull-down self-locking feature one and the pull-down self-locking feature two, and the insertion of the top self-locking feature one and the top self-locking feature two, are simultaneously in place.

[0027] Furthermore, the top-mounting mechanism of the inner cover of the junction box also includes:

[0028] A washer ring is attached to the edge of the bottom end of the outer cover of the junction box. When the outer cover of the junction box is closed over the inner cover of the junction box, the washer ring contacts the top surface of the inner cover of the junction box.

[0029] The inner groove is formed on the inner wall of the outer cover of the junction box. The inner groove corresponds to the position and size of the top end of the pull-down self-locking feature and the top end of the pull-down self-locking feature is movably sleeved in the inner groove.

[0030] A rotary bearing, the outer ring of which is connected to the top wall of the inner cover of the box, and the inner ring of which is connected to a pull-down self-locking feature.

[0031] A coil spring, one end of which is connected to the outer ring of the rotary bearing, and the other end of which surrounds the pull-down self-locking feature and is connected to the outer wall of the pull-down self-locking feature.

[0032] Furthermore, a deflection guide groove is formed on the outer wall of the pull-down self-locking feature one, and the end of the hook platform of the pull-down self-locking feature two is slidably connected in the deflection guide groove, the deflection guide groove comprising:

[0033] The inclined groove, with its top end located below the hook of the pull-down self-locking feature, extends downward along the outer wall of the pull-down self-locking feature and deflects 90°.

[0034] The vertical groove is connected to the bottom end of the inclined groove, and extends vertically upward along the outer wall of the pull-down self-locking feature one to the top end of the pull-down self-locking feature one.

[0035] The center of the inner wall at the connection between the inclined groove and the vertical groove is offset relative to the center of the outer wall at the connection between the two towards the side where the top of the inclined groove is located.

[0036] The height of the inner groove is greater than the height of the inclined groove in the vertical direction.

[0037] Furthermore, the second self-locking feature of the pull-down mechanism includes:

[0038] The upper column rod is connected to the inner wall of the bottom end of the outer cover of the junction box and extends downward. The bottom end of the upper column rod is concave and has an outwardly protruding sliding rod.

[0039] The lower column is located below the upper column. The lower column is hollow and has an opening on its top surface. The inner diameter of the lower column is larger than the outer diameter of the upper column. The upper column slides downward from the opening of the lower column and is fitted inside the lower column.

[0040] A guide groove is formed on the inner wall of the lower column rod, and the slide rod of the upper column rod is slidably connected in the guide groove.

[0041] The spring is located inside the lower column. One end of the spring is connected to the outer wall of the bottom end of the upper column, and the other end of the spring is connected to the inner wall of the bottom of the lower column.

[0042] This application has the following beneficial effects:

[0043] 1. This application provides a self-locking waterproof junction box structure for pumps. By dividing the junction box cover in the prior art into an inner cover and an outer cover, the inner cover is first fixed to the lower cover of the junction box with screws. Then, the outer cover is placed on top of the inner cover, and a self-locking structure is used to lock the inner cover and the outer cover together. The screw holes of the screws are covered inside the outer cover, which solves the problem of the overall appearance of the junction box structure being damaged due to exposed screws in the prior art. Furthermore, since the label is affixed to the outer surface of the outer cover, it will not affect the position of the screws, thus improving the overall appearance of the junction box structure.

[0044] 2. The pump self-locking waterproof junction box structure provided in this application, by opening inclined grooves and vertical grooves on the outer wall of the pull-down self-locking feature one, and slidingly connecting the hook end of the pull-down self-locking feature two in the inclined grooves and vertical grooves, utilizes the structure of the inclined grooves offset by 90° at the beginning and end to achieve the function of misalignment between the top hook of the pull-down self-locking feature one and the hook end of the pull-down self-locking feature two. This eliminates the method in the prior art that requires applying tension to deform and misalign the pull-down self-locking features one and two to open the cover, reduces the difficulty of opening the cover, avoids wear on the pull-down self-locking features one and two during the opening process, and extends the service life of the junction box structure.

[0045] 3. The pump self-locking waterproof junction box structure provided in this application divides the upper self-locking feature into an upper column and a lower column, which are connected in a sleeve manner. During the opening process, the outer cover of the junction box is pressed to cause the spring to deform, realizing the energy storage process of the spring. The elastic potential energy of the spring is released to cause the outer cover of the junction box to spring open upward, realizing the function of separating the outer cover of the junction box from the inner cover of the junction box. The elastic force of the spring replaces the upward force of the human hand on the outer cover of the junction box, improving the convenience of opening the cover. Attached Figure Description

[0046] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0047] This application can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0048] Figure 1 This is a perspective view of the present invention;

[0049] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0050] Figure 3 This is a partial front sectional view of Embodiment 1 of the present invention;

[0051] Figure 4 This is a left sectional view of Embodiment 1 of the present invention;

[0052] Figure 5 for Figure 4 Enlarged view of point A;

[0053] Figure 6 This is a right sectional view of Embodiment 1 of the present invention;

[0054] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0055] Figure 8 for Figure 7 Enlarged view of point B;

[0056] Figure 9 This is a structural schematic diagram of the pull-down self-locking feature one of the present invention;

[0057] Figure 10 This is a schematic diagram of the structure of the second self-locking feature at the top in Embodiment 2 of the present invention;

[0058] Figure 11 for Figure 10 Enlarged diagram of point C.

[0059] In the diagram: 001, junction box body; 010, lower cover of junction box; 020, inner upper cover of junction box; 021, soft rubber; 022, hard rubber; 030, outer upper cover of junction box; 040, label on upper box; 050, screw; 002, self-locking structure; 025, pull-down self-locking feature one; 035, pull-down self-locking feature two; 026, top self-locking feature one; 036, top self-locking feature two; 300, washer ring; 310, inner groove; 600, rotary bearing; 610, coil spring; 251, inclined groove; 252, vertical groove; 361, upper column rod; 362, lower column rod; 363, guide groove; 364, spring. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Example 1

[0061] Please see Figure 1 and attached Figure 2 A self-locking waterproof junction box structure for pumps, comprising:

[0062] The junction box body 001 is used to seal and hold cables; the junction box body 001 includes:

[0063] The lower cover of the junction box (010) houses the cables.

[0064] The upper inner cover 020 of the junction box is installed on the lower inner cover 010 of the junction box, and the upper inner cover 020 is sealed to the lower inner cover 010 by a sealing element. The installation of the upper inner cover 020 and the lower inner cover 010 is detachable; the upper inner cover 020 can be removed from the lower inner cover 010. Generally, it can be pressed into the lower inner cover 010 and then secured to the lower inner cover 010 with screws 050. See appendix. Figure 2 When the upper cover 020 of the junction box is installed inside the lower cover 010 of the junction box, the outer periphery of the upper cover 020 of the junction box is located inside the lower cover 010 of the junction box. The installation of the lower cover 010 and the upper cover 020 of the junction box is achieved by the friction between the outer wall of the upper cover 020 and the inner wall of the lower cover 010 of the junction box.

[0065] The outer top cover 030 of the junction box is positioned above the inner top cover 020 of the junction box and is connected to the inner top cover 020. The connection between the outer top cover 030 and the inner top cover 020 is detachable, and the outer top cover 030 can be removed from the inner top cover 020.

[0066] A self-locking structure 002 is disposed on the inner top cover 020 and the outer top cover 030 of the wire box, for connecting the inner top cover 020 and the outer top cover 030 of the wire box; the self-locking structure 002 includes:

[0067] The top-mounted mechanism is used to apply an upward thrust to the outer top cover 030 of the junction box.

[0068] The pull-down mechanism is used to apply a downward pulling force to the outer top cover 030 of the junction box.

[0069] A self-locking waterproof junction box structure for pumps also includes:

[0070] The label 040 is placed on the top surface of the outer cover 030 of the junction box and is used to identify information.

[0071] Screw 050 is used to secure the upper cover 020 and the lower cover 010 inside the junction box.

[0072] The outer cover 030 of the junction box is positioned above the inner cover 020, with the screws 050 housed inside the outer cover 030. This solves the problem in existing technologies where exposed screw holes on the junction box cover disrupt the overall appearance and result in an unattractive junction box structure. Furthermore, the outer cover 030 and the inner cover 020 are connected by a press-fit method, eliminating the need for screws. Therefore, the surface of the outer cover 030 is free of screw holes, maintaining its intact appearance. By affixing the label 040 to the top surface of the outer cover 030, the problem of restricted screw placement, common in existing technologies, is avoided, ensuring both the integrity and aesthetic appeal of the junction box structure.

[0073] The sealing element provided between the upper cover 020 and the lower cover 010 of the junction box includes:

[0074] Soft adhesive 021 is placed between the contact surfaces of the upper cover 020 and the lower cover 010 inside the junction box.

[0075] Hard plastic 022 is fitted onto the outer periphery of the bottom end of the upper cover 020 inside the wire box.

[0076] See appendix Figure 3 The inner wall of the lower cover 010 of the junction box has a protrusion. The upper cover 020 of the junction box is inserted into the lower cover 010, and the lower end of the upper cover 020 moves to the protrusion on the inner wall of the lower cover 010. Then, screws 050 are used to fix the upper cover 020 and the lower cover 010. In this embodiment, a hard rubber 022 is sleeved on the outer periphery of the bottom of the upper cover 020. When the upper cover 020 is inserted into the lower cover 010, the hard rubber 022 directly contacts the inner wall of the lower cover 010 instead of the upper cover 020, thereby improving the original sealing between the upper cover 020 and the lower cover 010. See also the appendix. Figure 3 The soft rubber 021 is placed on the protrusion on the inner wall of the lower cover 010 of the junction box. When the upper cover 020 of the junction box moves downward along the inner wall of the lower cover 010, the lower end of the upper cover 020 of the junction box is pressed against the soft rubber 021, thereby further improving the sealing performance of the contact between the upper cover 020 of the junction box and the lower cover 010 of the junction box.

[0077] See appendix Figure 6 The upper mechanism of the self-locking structure 002 includes:

[0078] The top self-locking feature 026 is set on the top surface of the inner cover 020 of the junction box. The top self-locking feature 026 is a groove formed by the inner cover 020 of the junction box being recessed downward.

[0079] The second self-locking feature 036 is located on the bottom surface of the outer cover 030 of the junction box. The second self-locking feature 036 is plate-shaped or column-shaped. The position and shape of the second self-locking feature 036 match the first self-locking feature 026. When the outer cover 030 of the junction box is closed on the inner cover 020 of the junction box, the second self-locking feature 036 is inserted into the first self-locking feature 026. The length of the second self-locking feature 036 is greater than the depth of the first self-locking feature 026.

[0080] Because the length of the second self-locking feature 036 is greater than the depth of the first self-locking feature 026, a gap is formed between the inner wall of the top of the outer cover 030 and the outer wall of the top of the inner cover 020 when the outer cover 030 is placed on top of the inner cover 020. This gap allows for manual opening or closing of both the outer cover 030 and the inner cover 020.

[0081] See appendix Figure 4 and attached Figure 5 The drop-down mechanism includes:

[0082] Pull-down self-locking feature 025 is located on the top surface of the inner cover 020 of the junction box. Pull-down self-locking feature 025 is in the form of a vertically upward column or plate, and the top of pull-down self-locking feature 025 is provided with a hook.

[0083] Pull-down self-locking feature 2 035 is set on the bottom surface of the outer cover 030 of the wire box. Pull-down self-locking feature 2 035 is provided with a hook platform that matches the top hook of pull-down self-locking feature 1 025. The hook of pull-down self-locking feature 1 025 is engaged with the hook platform of pull-down self-locking feature 2 035.

[0084] Both pull-down self-locking feature 1 (025) and pull-down self-locking feature 2 (035) are elastic. The contact surfaces of the top hook of pull-down self-locking feature 1 (025) and the hook platform of pull-down self-locking feature 2 (035) are both flat and parallel to the horizontal plane.

[0085] When the outer cover 030 of the junction box is closed on top of the inner cover 020, the pull-down self-locking feature 1 025 and the pull-down self-locking feature 2 035 come into contact and deform. As the outer cover 030 continues to move toward the inner cover 020, the hook at the top of the pull-down self-locking feature 1 025 engages with the hook platform of the pull-down self-locking feature 2 035. The tension generated by the engagement keeps the inner cover 020 and the outer cover 030 closed. When it is necessary to disassemble the inner cover 020 and the outer cover 030, a force exceeding the engagement force of the pull-down self-locking feature 1 025 and the pull-down self-locking feature 2 035 is required to disassemble the inner cover 020 and the outer cover 030.

[0086] The locking positions of pull-down self-locking feature 1 025 and pull-down self-locking feature 2 035, and the plugging positions of top self-locking feature 1 026 and top self-locking feature 2 036, meet the following conditions: when the outer cover 030 of the junction box is closed above the inner cover 020 of the junction box, the locking of pull-down self-locking feature 1 025 and pull-down self-locking feature 2 035 and the plugging of top self-locking feature 1 026 and top self-locking feature 2 036 are simultaneously in place.

[0087] The above conditions determine the lengths of pull-down self-locking feature 1 025 and pull-down self-locking feature 2 035, as well as the depth of top self-locking feature 1 026 and the length of top self-locking feature 2 036. Example 2

[0088] In one embodiment, when it is necessary to disassemble the inner cover 020 and the outer cover 030 of the junction box, a force exceeding the locking force of the first pull-down self-locking feature 025 and the second pull-down self-locking feature 035 is required to disassemble them. To ensure the tightness of the fit between the outer cover 030 and the inner cover 020, the locking force of the first pull-down self-locking feature 025 and the second pull-down self-locking feature 035 needs to be increased. However, if the locking force of the first pull-down self-locking feature 025 and the second pull-down self-locking feature 035 is too large, a large force is also required when opening the cover, making it inconvenient. Furthermore, the outer cover 030 can only be opened by hand by pulling it upwards, which is also inconvenient. Therefore, to solve this problem, this application provides an embodiment two, as follows:

[0089] Please see Figure 7 Appendix Figure 8 and attached Figure 9 8. A self-locking waterproof junction box structure for pumps, further comprising:

[0090] A washer ring 300 is connected to the bottom edge of the outer cover 030 of the junction box. When the outer cover 030 is closed over the inner cover 020, the washer ring 300 contacts the top surface of the inner cover 020. The washer ring 300 seals the edges of the inner and outer covers 020 when they are closed. When the outer cover 030 is pressed down, it deforms, allowing it to move downwards a certain distance; this distance is the vertical deformation height of the washer ring 300.

[0091] The inner groove 310 is formed on the inner wall of the outer cover 030 of the junction box. The inner groove 310 corresponds to the top of the pull-down self-locking feature 025 in position and size. The top of the pull-down self-locking feature 025 is movably fitted into the inner groove 310. When the outer cover 030 of the junction box is closed with the inner cover 020 of the junction box, pressing down on the outer cover 030 of the junction box deforms the washer 300, and the inner groove 310 covers the top of the pull-down self-locking feature 025.

[0092] A rotary bearing 600 has its outer ring connected to the top wall of the inner cover 020 of the cable box, and its inner ring connected to a pull-down self-locking feature 025. That is, the bottom end of the pull-down self-locking feature 025 is not connected to the top wall of the inner cover 020 of the cable box. Because the inner and outer rings of the rotary bearing 600 can rotate relative to each other, the pull-down self-locking feature 025 connected to the inner ring of the rotary bearing 600 can rotate.

[0093] A coil spring 610 is provided, with one end connected to the outer ring of the rotary bearing 600, and the other end of the coil spring 610 encircling the pull-down self-locking feature 025 and connected to the outer wall of the pull-down self-locking feature 025. The coil spring 610 is used to drive the rotated pull-down self-locking feature 025 to rotate back to its original state.

[0094] The pull-down self-locking feature 1 025 has a deflection guide groove on its outer wall, and the end of the hook platform of the pull-down self-locking feature 2 035 is slidably connected in the deflection guide groove. The deflection guide groove includes:

[0095] The inclined groove 251, with its top end located below the hook of the pull-down self-locking feature 025, extends downward along the outer wall of the pull-down self-locking feature 025 and deflects by 90°. (See appendix) Figure 8 and attached Figure 9 As shown, when the pull-down self-locking feature 1 025 is rotated 90° counterclockwise, the hook at the top of the pull-down self-locking feature 1 025 is misaligned with the hook platform of the pull-down self-locking feature 2 035.

[0096] The vertical groove 252 is connected to the bottom end of the inclined groove 251, and the vertical groove 252 extends vertically upward along the outer wall of the pull-down self-locking feature 025 to the top of the pull-down self-locking feature 025.

[0097] The center of the inner wall at the junction of the inclined groove 251 and the vertical groove 252 is offset relative to the center of the outer wall at the junction towards the side where the top of the inclined groove 251 is located. See Appendix Figure 9In the diagram, the center points on both the inner and outer walls at the connection between the inclined groove 251 and the vertical groove 252 are marked with circles. It can be seen that the center point on the upper part (inner wall) is more to the right (the side where the top of the inclined groove 251 is located) than the center point on the lower part (outer wall). When the hook of the self-locking feature 2035 is pulled down and moves to the bottom of the connection between the inclined groove 251 and the vertical groove 252, and then moves upwards, it is obstructed by the inner wall of the connection and will only move upwards from the vertical groove 252, without returning to the inclined groove 251.

[0098] See appendix Figure 7 Appendix Figure 8 and attached Figure 9 As shown, when the inner cover 020 and the outer cover 030 of the wire box are closed, when it is necessary to remove the outer cover 030 from above the inner cover 020, continue to press down on the outer cover 030. The washer ring 300 is deformed by downward compression, and the hook end of the self-locking feature 2 035 moves along the inclined groove 251. Since the inclined groove 251 is deflected 90° clockwise, when the self-locking feature 2 035 is pulled down vertically... When moving downwards, the pull-down self-locking feature 1 025 rotates 90° counterclockwise. When the hook end of the pull-down self-locking feature 2 035 moves to the connection between the inclined groove 251 and the vertical groove 252, the pressure on the outer cover 030 of the wire box is released. If an upward force is applied to the outer cover 030 of the wire box at this time, the hook of the pull-down self-locking feature 2 035 enters the vertical groove 252 and moves upwards along the vertical groove 252 until it is removed from the vertical groove 252. At this time, the inner cover 020 of the wire box opens with the outer cover 030 of the wire box. Then, the pull-down self-locking feature 1 025 will rotate in the opposite direction under the action of the coil spring 610 to the attached... Figure 7 The state shown.

[0099] The height of the inner groove 310 is greater than the height of the inclined groove 251 in the vertical direction. Therefore, when the outer cover 030 of the junction box is pressed to the lower limit, there is a gap between the top of the pull-down self-locking feature 025 and the top wall of the washer ring 300, so that the rotation of the pull-down self-locking feature 025 will not rub against the top wall of the washer ring 300.

[0100] The aforementioned statement, "If an upward force is applied to the outer top cover 030 of the junction box at this time, the hook of the pull-down self-locking feature 2 035 will enter the vertical groove 252," indicates that this "upward force" can be generated by manually pulling upwards. In this case, the manual upward pull does not require a large force; it only needs to be greater than the weight of the outer top cover 030 of the junction box. This solves the problem in the embodiment where a large force is needed to overcome the locking force between the pull-down self-locking feature 1 025 and the pull-down self-locking feature 2 035. Furthermore, this application improves the top self-locking feature 2 036 to further enhance the ease of opening the cover.

[0101] See appendix Figure 10 and attached Figure 11The top self-locking feature 2036 includes:

[0102] The upper column rod 361 is connected to the inner wall of the bottom end of the outer cover 030 of the junction box and extends downward. The bottom end of the upper column rod 361 is concave and has an outwardly protruding sliding rod.

[0103] The lower column rod 362 is located below the upper column rod 361. The lower column rod 362 is a hollow column with an opening on its top surface. The inner diameter of the lower column rod 362 is larger than the outer diameter of the upper column rod 361. The upper column rod 361 slides downward from the opening of the lower column rod 362 and is sleeved inside the lower column rod 362.

[0104] The guide groove 363 is formed on the inner wall of the lower column rod 362, and the slide rod of the upper column rod 361 is slidably connected in the guide groove 363. It guides the movement of the upper column rod 361 into the lower column rod 362, and also connects the upper column rod 361 and the lower column rod 362 to prevent them from falling off.

[0105] Spring 364 is located inside the lower column rod 362. One end of spring 364 is connected to the bottom outer wall of the upper column rod 361, and the other end of spring 364 is connected to the bottom inner wall of the lower column rod 362.

[0106] The inner top cover 020 and the outer top cover 030 of the junction box are in the normal closed state, that is, attached Figure 7 The state shown indicates that the upper self-locking feature 2036 is attached. Figure 11The spring 364 is in its natural length, that is, neither stretched nor compressed. Therefore, the spring 364 exerts no force on the upper rod 361 and the lower rod 362. Both the upper rod 361 and the lower rod 362 are in their stretched limit positions, and the bottom end of the lower rod 362 is just resting on the inner bottom wall of the upper self-locking feature 026. At this time, the bottom end of the upper rod 361 also extends a portion into the interior of the upper self-locking feature 026, so that the upper self-locking feature 026 has a lateral positioning function for the upper rod 361. If the outer cover 030 of the wire box is pushed laterally at this time, the upper cover 030 of the wire box cannot be misaligned with the inner cover 020 of the wire box due to the obstruction of the upper rod 361. When it is necessary to remove the outer cover 030 of the wire box from above the inner cover 020 and continue pressing the outer cover 030 downwards, the upper rod 361 moves downwards and compresses the spring 364, causing the spring 364 to be compressed and store energy. When the hook of the second self-locking feature 2 035 moves to the bottom of the inclined groove 251, the pressure on the outer cover 030 is released. Then, the outer cover 030 springs upwards under the elastic potential energy of the spring 364, thereby realizing the function of separating the outer cover 030 from the inner cover 020. This solves the problem in Embodiment 1 where the outer cover 030 needs to be manually pulled upwards with force, and the hook of the first self-locking feature 025 and the hook of the second self-locking feature 2 035 need to be deformed and misaligned to separate the inner cover 020 from the outer cover 030.

Claims

1. A self-locking waterproof junction box structure for pumps, characterized in that, include: The junction box body (001) is used to seal and hold cables; The junction box body (001) includes: The lower cover of the junction box (010) houses the cables. The inner upper cover (020) of the junction box is installed on the lower cover (010) of the junction box, and the inner upper cover (020) of the junction box is sealed to the lower cover (010) of the junction box through a sealing element; The outer top cover (030) of the junction box is placed above the inner top cover (020) of the junction box and is connected to the inner top cover (020); A self-locking structure (002) is provided on the inner top cover (020) and the outer top cover (030) of the wire box, for connecting the inner top cover (020) and the outer top cover (030); the self-locking structure (002) includes: The top-mounting mechanism is used to apply an upward thrust to the outer top cover (030) of the junction box; A pull-down mechanism is used to apply a downward pulling force to the outer top cover (030) of the junction box; The upper mechanism of the self-locking structure (002) includes: The top self-locking feature 1 (026) is provided on the top surface of the inner cover (020) of the wire box. The top self-locking feature 1 (026) is a groove formed by the inner cover (020) of the wire box being recessed downwards. The second self-locking feature (036) is set on the bottom surface of the outer cover (030) of the wire box. The second self-locking feature (036) is plate-shaped or column-shaped. The position and shape of the second self-locking feature (036) match the first self-locking feature (026). The second self-locking feature (036) is inserted into the first self-locking feature (026). The length of the second self-locking feature (036) is greater than the depth of the first self-locking feature (026). The pull-down mechanism includes: Pull-down self-locking feature 1 (025) is provided on the top surface of the inner cover (020) of the wire box. The pull-down self-locking feature 1 (025) is in the shape of a vertically upward column or plate. The top of the pull-down self-locking feature 1 (025) is provided with a hook. Pull-down self-locking feature two (035) is set on the bottom surface of the outer cover (030) of the wire box. The pull-down self-locking feature two (035) is provided with a hook platform that matches the top hook of the pull-down self-locking feature one (025). The hook of the pull-down self-locking feature one (025) is engaged with the hook platform of the pull-down self-locking feature two (035). The top-mounting mechanism of the inner cover (020) of the junction box also includes: A washer (300) is connected to the edge of the bottom end of the outer cover (030) of the wire box. When the outer cover (030) of the wire box is closed on the inner cover (020) of the wire box, the washer (300) contacts the top surface of the inner cover (020). The inner groove (310) is opened on the inner wall of the outer cover (030) of the wire box. The inner groove (310) corresponds to the position and size of the top of the pull-down self-locking feature (025). The top of the pull-down self-locking feature (025) is movably sleeved in the inner groove (310). A rotary bearing (600) has an outer ring connected to the top wall of the inner cover (020) of the wire box, and an inner ring connected to a pull-down self-locking feature (025). A coil spring (610) is provided, one end of which is connected to the outer ring of the rotary bearing (600), and the other end of which surrounds the pull-down self-locking feature (025) and is connected to the outer wall of the pull-down self-locking feature (025).

2. The pump self-locking waterproof junction box structure according to claim 1, characterized in that, Also includes: A label (040) is placed on the top surface of the outer cover (030) of the junction box for marking information; Screws (050) are used to secure the upper cover (020) and the lower cover (010) inside the junction box.

3. The pump self-locking waterproof junction box structure according to claim 1, characterized in that, The sealing element provided between the upper cover (020) and the lower cover (010) of the junction box includes: Soft rubber (021) is placed between the contact surfaces of the upper cover (020) and the lower cover (010) of the wire box; Hard plastic (022) is fitted onto the outer periphery of the bottom end of the upper cover (020) inside the box.

4. The pump self-locking waterproof junction box structure according to claim 1, characterized in that, Both the pull-down self-locking feature one (025) and the pull-down self-locking feature two (035) are elastic. The contact surfaces of the top hook of the pull-down self-locking feature one (025) and the hook platform of the pull-down self-locking feature two (035) are both planar and parallel to the horizontal plane.

5. The pump self-locking waterproof junction box structure according to claim 1, characterized in that, The locking positions of the pull-down self-locking feature one (025) and the locking positions of the top self-locking feature one (026) and the top self-locking feature two (035) satisfy the following conditions: when the outer cover (030) of the wire box is closed above the inner cover (020) of the wire box, the locking of the pull-down self-locking feature one (025) and the locking of the pull-down self-locking feature two (035) are simultaneously in place with the locking of the top self-locking feature one (026) and the locking of the top self-locking feature two (036).

6. The pump self-locking waterproof junction box structure according to claim 1, characterized in that, The outer wall of the pull-down self-locking feature one (025) is provided with a deflection guide groove, and the end of the hook platform of the pull-down self-locking feature two (035) is slidably connected in the deflection guide groove. The deflection guide groove includes: The inclined groove (251) is located below the hook of the pull-down self-locking feature (025) at its top end. The inclined groove (251) extends downward along the outer wall of the pull-down self-locking feature (025) and deflects 90°. The vertical groove (252) is connected to the bottom end of the inclined groove (251), and the vertical groove (252) extends vertically upward along the outer wall of the pull-down self-locking feature (025) to the top end of the pull-down self-locking feature (025); The center of the inner wall at the connection between the inclined groove (251) and the vertical groove (252) is offset relative to the center of the outer wall at the connection between the two towards the side where the top of the inclined groove (251) is located; The height of the inner groove (310) is greater than the height of the inclined groove (251) in the vertical direction.

7. The pump self-locking waterproof junction box structure according to claim 6, characterized in that, The upper self-locking feature two (036) of the pull-down mechanism includes: The upper column rod (361) is connected to the inner wall of the bottom end of the outer cover (030) of the box and extends downward. The bottom end of the upper column rod (361) is concave and the bottom end of the upper column rod (361) is provided with a protruding sliding rod. The lower column (362) is located below the upper column (361). The lower column (362) is a hollow column with an open top surface. The inner diameter of the lower column (362) is larger than the outer diameter of the upper column (361). The upper column (361) slides down into the lower column (362) from the opening of the lower column (362). The guide groove (363) is formed on the inner wall of the lower column rod (362), and the slide rod of the upper column rod (361) is slidably connected in the guide groove (363); Spring (364) is located inside the lower column rod (362). One end of spring (364) is connected to the bottom outer wall of the upper column rod (361), and the other end of spring (364) is connected to the bottom inner wall of the lower column rod (362).

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