Junction box lead wire installation detection structure and motor detection fixture

Abstract

The application provides a terminal box lead wire installation detection structure and a motor detection jig, which are used for detecting whether a lead wire is in place after being inserted into a terminal box. The terminal box comprises at least one lead wire channel, and the lead wire channel corresponds to an insertion hole penetrating through the upper surface of the terminal box. The end of the lead wire is inserted into the lead wire channel after being fixed with a metal terminal, and the metal terminal is provided with a connecting hole for providing electrical connection. The terminal box lead wire installation detection structure comprises a detection column, which is used for being inserted into the insertion hole. The outer circumferential surface of the detection column comprises a live surface and an insulating surface, the insulating surface faces one side of the extension direction of the lead wire channel, and the live surface contacts the hole wall of the connecting hole when the detection column is inserted into the connecting hole; and the insulating surface covers the front end of the metal terminal when the detection column is located at the front end of the metal terminal. The structure can detect whether the metal terminal and the terminal box are in place and whether there is a virtual connection problem of the metal terminal, thereby reducing the false detection probability and improving the motor quality.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a test structure for lead wire installation in a junction box and a motor testing fixture. Background Technology

[0002] Please combine Figure 1 The junction box 30 includes at least one insertion channel 31, with an insertion hole 32 penetrating the upper surface of the junction box 30 corresponding to the insertion channel 31. The end of the lead wire 10 is fixed to the metal terminal 20 and then inserted into the insertion channel 31. The metal terminal 20 is provided with a connection hole 22 for electrical connection. Because the existing metal terminal 20 and junction box 30 are installed by plugging, insufficient insertion force during installation can easily prevent the metal terminal 20 from being inserted to the bottom of the insertion channel 31, resulting in incomplete insertion of the metal terminal 20 and junction box 30. This can easily lead to the metal terminal 20 falling off later, reducing product yield or resulting in a large number of reworked products, affecting production efficiency.

[0003] Currently, the detection of whether the metal terminal 20 is properly connected to the junction box 30 typically involves inserting a test post 40 into the insertion hole 32 of the junction box 30. If properly connected, the test post 40 can extend from the insertion hole 32 into the connection hole 22 of the metal terminal 20, causing the test post 40 to contact the wall of the connection hole 22 and achieving electrical continuity. This method of detecting whether the test post 40 is energized verifies whether the metal terminal 20 is properly connected. However, the following situation may occur during the current testing process: Please combine Figure 2 The metal terminal 20 is not actually inserted correctly; its front end is some distance from the correct installation position (the bottom of the wiring channel 31), creating a gap A. After inserting the test post 40, it may extend into the gap A between the metal terminal 20 and the junction box 30, causing the front end of the test post 40 to make contact with the metal terminal 20. In this case, the test post 40 also appears to be electrically conductive, easily leading to a misjudgment that the metal terminal 20 is properly inserted. Therefore, the existing detection structure contains false positives, has low detection accuracy, and cannot prevent the metal terminal from falling off and requiring rework later. Utility Model Content

[0004] The purpose of this utility model is to provide a junction box lead wire installation and detection structure and a motor testing fixture, which can improve detection accuracy, prevent misjudgment, ensure that the metal terminals and junction box in motor products are properly connected, and improve product quality.

[0005] In a first aspect, this utility model provides a lead wire installation detection structure for a junction box, used to detect whether the lead wire is properly inserted into the junction box. The junction box includes at least one insertion channel, and the insertion channel has an insertion hole that penetrates the upper surface of the junction box. After the end of the lead wire is fixed to a metal terminal, it is inserted into the insertion channel, and the metal terminal is provided with a connection hole for providing electrical connection; The lead wire installation detection structure inside the junction box includes a probe post for insertion into an insertion hole. The outer peripheral surface of the probe post includes a charged surface and an insulating surface, with the insulating surface facing the extension direction of the wire insertion channel. When the probe post is inserted into the connection hole, the charged surface contacts the hole wall; when the probe post is located at the front end of the metal terminal, the insulating surface covers the front end of the metal terminal.

[0006] In an optional embodiment, the front end of the metal terminal has a mating end face; the projected area of ​​the insulating surface on the mating end face is greater than or equal to the area of ​​the mating end face.

[0007] In an optional embodiment, the insulating surface includes a first insulating portion and a second insulating portion symmetrically arranged about the axis of the probe column, wherein the first insulating portion or the second insulating portion is disposed on the side of the outer peripheral surface facing the metal terminal.

[0008] In an optional embodiment, the insulating surface further includes a connecting portion, one end of which is connected to the first insulating portion and the other end of which is connected to the second insulating portion.

[0009] In an optional embodiment, the connecting part is disposed at the insertion end of the probe column, and the projected area of ​​the connecting part on the insertion end is smaller than the area of ​​the insertion end.

[0010] In an optional embodiment, the charged surface is provided with a supporting portion that abuts against the wall of the connecting hole, and the insulating surface avoids the supporting portion.

[0011] In an optional embodiment, the height of the insulating surface along the axial direction of the probe post is greater than or equal to the depth of the connection hole.

[0012] In an optional embodiment, the insulating surface is made of any one or more of ceramics, glass, mica, rubber, plastics, resins, and fibers.

[0013] Secondly, this utility model provides a motor testing fixture, including a power supply and a lead wire installation and testing structure in a junction box as described in any of the foregoing embodiments, wherein the power supply and the probe column are electrically connected.

[0014] In an optional embodiment, a positioning block is protruding from the detection column, the positioning block and the detection column are coaxially arranged, and the peripheral side surface of the positioning block includes at least one positioning plane.

[0015] The junction box lead wire installation detection structure and motor detection fixture provided in this embodiment of the utility model have the following advantages: The junction box lead wire installation detection structure and motor detection fixture provided in this embodiment of the utility model have an insulating surface and a charged surface on the outer circumference of the probe post. When the metal terminal and the junction box are properly inserted, the probe post is inserted into the connection hole, causing the charged surface to contact the hole wall and exhibit electrical continuity. When the metal terminal and the junction box are not properly inserted, i.e., the probe post cannot be inserted into the connection hole, if the probe post is inserted into the gap between the front end of the metal terminal and the bottom of the wiring channel of the junction box, the insulating surface contacts the front end of the metal terminal, and no electrical continuity is exhibited. Therefore, false detections in the prior art can be prevented, and detection accuracy can be improved. This ensures that the metal terminal and the junction box are properly inserted during the production process, reducing the probability of subsequent product rework and improving product quality. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram illustrating the detection of whether the metal terminals of a motor are properly connected in the prior art. Figure 2 This is a schematic diagram illustrating a scenario where false detections occur in the existing technology for detecting metal terminals of motors. Figure 3 A schematic diagram of the structure of the metal terminal provided in the embodiment of this utility model; Figure 4 A schematic diagram of the junction box provided in an embodiment of this utility model; Figure 5 A schematic diagram illustrating the detection of the metal terminal and junction box being properly inserted according to an embodiment of this utility model; Figure 6 A schematic diagram illustrating the detection of a situation where the metal terminal and junction box are not properly inserted, as provided in an embodiment of this utility model. Figure 7 A schematic diagram of the junction box lead wire installation and detection structure provided in an embodiment of this utility model; Figure 8 A schematic diagram of the insertion end of the junction box lead wire installation and detection structure provided in this embodiment of the utility model; Figure 9A schematic diagram of the junction box lead wire installation and detection structure and metal terminal plugging provided in an embodiment of this utility model; Figure 10 A schematic diagram of the positioning block for the junction box lead wire installation and detection structure provided in this embodiment of the utility model.

[0018] Icons: 10-Leader; 20-Metal terminal; 21-Plug-in end face; 22-Connection hole; 30-Junction box; 31-Plug-in channel; 32-Insert hole; 40-Test post; 110-Detector post; 111-Outer peripheral surface; 112-Insert end; 113-Holding part; 114-Positioning block; 115-Positioning plane; 120-Insulating surface; 121-First insulating part; 122-Second insulating part; 123-Connecting part; 130-Civilized surface. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] Please combine Figures 3 to 6 This utility model provides a junction box lead wire installation detection structure, which is used to detect whether the lead wire 10 is properly inserted into the junction box 30. If it is properly inserted, it will flow into the subsequent production process in time. If it is not properly inserted, it will be corrected in time to reduce the probability of product rework in the later stage.

[0027] The lead-out detection structure inside the junction box includes a probe post 110, which is inserted into the insertion hole 32. The outer peripheral surface 111 of the probe post 110 includes a charged surface 130 and an insulating surface 120, with the insulating surface 120 facing the side extending in the direction of the insertion channel 31. When the probe post 110 is inserted into the connection hole 22, the charged surface 130 contacts the hole wall of the connection hole 22; when the probe post 110 is located at the front end of the metal terminal 20, the insulating surface 120 covers the front end of the metal terminal 20.

[0028] It is understandable that when the metal terminal 20 is not fully inserted into the wiring channel 31, the probe post 110 inserts from the insertion hole 32 but cannot be inserted into the connection hole 22. It may insert into the gap between the front end of the metal terminal 20 and the bottom of the wiring channel 31. In this case, the insulating surface 120 contacts the front end of the metal terminal 20, and the metal terminal 20 and the probe post 110 are not electrically connected. If the metal terminal 20 is fully inserted into the wiring channel 31, the probe post 110 inserts into the insertion hole 32 and the connection hole 22 in sequence, and the charged surface 130 contacts the side wall of the connection hole 22, so that the metal terminal 20 and the probe post 110 are electrically connected.

[0029] In this way, whether the metal terminal 20 is properly inserted can be determined by whether the metal terminal 20 and the probe post 110 are electrically connected. If the metal terminal 20 is not properly inserted, it needs to be adjusted and corrected in time.

[0030] Please combine Figure 7 and Figure 8 The probe post 110 has an insertion end 112, which is used to insert into the insertion hole 32.

[0031] It is understood that the probe post 110 is made of conductive material, which can be a cylinder, prism, or elliptical cylinder; no specific limitation is made here. The front end of the metal terminal 20 has a plug-in end face 21. The projected area of ​​the insulating surface 120 on the plug-in end face 21 of the metal terminal 20 is greater than or equal to the area of ​​the plug-in end face 21. The plug-in end face 21 refers to the end face of the metal terminal 20 near the bottom of the wiring channel 31 along the plugging direction with the junction box 30. The above-mentioned setting of the covering position of the insulating surface 120 ensures that after the probe post 110 is inserted into the gap between the metal terminal 20 and the junction box 30, only the insulating surface 120 and the metal terminal 20 will contact each other, so that the probe post 110 cannot show electrical continuity, indicating that the metal terminal 20 is not plugged in properly. This reduces the probability of false detection.

[0032] Optionally, the insulating surface 120 includes a first insulating portion 121 and a second insulating portion 122 symmetrically arranged about the axis of the probe post 110. The first insulating portion 121 or the second insulating portion 122 is located on the side of the outer peripheral surface 111 facing the metal terminal 20. That is, the first insulating portion 121 and the second insulating portion 122 are respectively provided on opposite sides of the probe post 110. This allows for the direction in which the probe post 110 is inserted into the insertion hole 32, preventing false detections whether it is inserted directly or after rotating 180 degrees, making the detection operation more flexible. Furthermore, if the first insulating portion 121 on one side is worn or damaged over a long period, it can still be inserted into the insertion hole 32 in the opposite direction after rotating 180 degrees, continuing to use the second insulating portion 122 for detection, thus extending the service life of the probe post 110.

[0033] Optionally, the insulating surface 120 further includes a connecting portion 123, one end of which is connected to the first insulating portion 121, and the other end is connected to the second insulating portion 122. The connecting portion 123 connects the first insulating portion 121 and the second insulating portion 122 together, improving structural reliability. Furthermore, the connecting portion 123 increases the contact area between the insulating surface 120 and the probe post 110, resulting in better bonding and reducing the likelihood of detachment or separation. The inclusion of the first insulating portion 121 and the second insulating portion 122 also increases the contact area and improves bonding.

[0034] Optionally, the connecting part 123 is provided on the insertion end 112, and the projected area of ​​the connecting part 123 on the insertion end 112 is smaller than the area of ​​the insertion end 112.

[0035] It should be noted that in some embodiments, when the metal terminal 20 and the junction box 30 are plugged in, if the bottom of the connection hole 22 of the metal terminal 20 is required to make contact with the insertion end 112 to achieve electrical conduction of the probe 110, then the area of ​​the connecting part 123 needs to be smaller than the area of ​​the insertion end 112. If the electrical conduction of the probe 110 is achieved through the contact between the charged surface 130 on the outer peripheral surface 111 and the hole wall of the connection hole 22, then the connecting part 123 can completely cover the insertion end 112.

[0036] Similarly, if the electrical conduction of the probe post 110 is achieved through the contact between the insertion end 112 of the insertion end and the bottom of the connection hole 22 of the metal terminal 20, then the insulating surface 120 can also cover most or completely the outer peripheral surface 111.

[0037] Please combine Figure 9 In this embodiment, the charged surface 130 of the outer peripheral surface 111 is provided with a supporting portion 113 that abuts against or contacts the wall of the connecting hole 22, and the insulating surface 120 avoids the supporting portion 113. In other words, the electrical conduction of the probe post 110 is achieved through the contact between the supporting portion 113 of the charged surface 130 and the wall of the connecting hole 22. The insulating surface 120 only needs to avoid the supporting portion 113.

[0038] Optionally, the cross-section of the metal terminal 20 is approximately elliptical, and the insertion direction of the metal terminal 20 and the junction box 30 is along the major axis of the ellipse. The connecting hole 22 is approximately circular, and its diameter is approximately equal to the minor axis of the ellipse. The outer diameter of the probe post 110 is approximately equal to the inner diameter of the connecting hole 22. The supporting portion 113 is generally located on both sides of the probe post 110 along its minor axis. The insulating surface 120 is generally located on both sides of the probe post 110 along its major axis.

[0039] Optionally, the height of the insulating surface 120 along the axial direction of the probe post 110 is greater than or equal to the depth of the connecting hole 22, which helps to reduce the probability of false detection and improve detection accuracy and reliability.

[0040] Optionally, the insulating surface 120 may be made of one or more materials selected from ceramics, glass, mica, rubber, plastics, resins, and fibers. The insulating surface 120 may be applied to the detector post 110 by spraying, bonding, riveting, pressing, snapping, screwing, or other methods. The first insulating part 121, the second insulating part 122, and the connecting part 123 may be integrally formed or separately fixedly connected; no specific limitation is made here. It is worth noting that after designing the insulating surface 120 on the surface of the detector post 110, the surface of the insulating surface 120 may protrude from the surface of the detector post 110. Alternatively, in some embodiments, the insulating surface 120 may also adopt an embedded design, making the surface of the insulating surface 120 flush with the surface of the detector post 110; no specific limitation is made here. The embedded design may be fully embedded or semi-embedded. With an embedded design, the insulating surface 120 has better stability, stronger adhesion to the detector post 110, and can reduce wear.

[0041] This utility model embodiment also provides a motor testing fixture, including a power supply and a lead-out testing structure in a junction box as described in any of the foregoing embodiments. The power supply and the probe post 110 are electrically connected. Optionally, the probe post 110 is fixed on a test base.

[0042] Please combine Figure 10 Optionally, a positioning block 114 protrudes from the probe post 110, and the positioning block 114 and the probe post 110 are coaxially arranged. The peripheral surface of the positioning block 114 includes at least one positioning plane 115. The positioning block 114 is used to connect with the test seat to prevent the probe post 110 from rotating relative to the test seat. In this embodiment, the positioning block 114 can adopt a flat key structure, and its peripheral surface is provided with two positioning planes 115, which are arranged opposite to each other. In some other embodiments, the positioning block 114 can also adopt other cross-sectional shapes, and the positioning planes 115 can be one, two, three or more, which is not specifically limited here.

[0043] During the testing process, the probe 110 is inserted into the insertion hole 32. After the power is turned on, if there is electrical continuity between the probe 110 and the metal terminal 20, the circuit is complete, indicating that the metal terminal 20 and the junction box 30 are properly connected. If there is no electrical continuity between the probe 110 and the metal terminal 20, the circuit is open, indicating that the metal terminal 20 and the junction box 30 are not properly connected.

[0044] In summary, the junction box lead wire installation detection structure and motor testing fixture provided by this utility model embodiment have the following beneficial effects: The junction box lead wire installation detection structure and motor testing fixture provided in this embodiment of the utility model have an insulating surface 120 and a charged surface 130 on the outer peripheral surface 111 of the detection post 110. When the metal terminal 20 and the junction box 30 are not properly inserted, even if the detection post 110 is inserted into the gap between the metal terminal 20 and the junction box 30, the insulating surface 120 and the insertion end surface 21 of the metal terminal 20 will only make contact, and there will be no electrical continuity. Therefore, false detection can be prevented, detection accuracy can be improved, and the detection results can be accurate and reliable. This ensures that the metal terminal 20 and the junction box 30 are properly inserted during the production process, reducing the probability of subsequent product rework and improving product quality.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of this utility model.

Claims

1. A lead wire installation detection structure for a junction box, used to detect whether a lead wire (10) is properly inserted into a junction box (30), wherein the junction box (30) includes at least one insertion channel (31), the insertion channel (31) having an insertion hole (32) penetrating the upper surface of the junction box (30); the end of the lead wire (10) is fixed to a metal terminal (20) and then inserted into the insertion channel (31), the metal terminal (20) having a connection hole (22) for providing electrical connection; characterized in that, The junction box internal lead wire installation detection structure includes: A probe (110) is used to insert into the insertion hole (32); The outer peripheral surface (111) of the probe post (110) includes a charged surface (130) and an insulating surface (120). The insulating surface (120) faces the side extending in the direction of the insertion channel (31). When the probe post (110) is inserted into the connection hole (22), the charged surface (130) contacts the hole wall of the connection hole (22). When the probe post (110) is located at the front end of the metal terminal (20), the insulating surface (120) covers the front end of the metal terminal (20).

2. The junction box lead wire installation and detection structure according to claim 1, characterized in that, The front end of the metal terminal (20) has a plug-in end face (21); the projected area of ​​the insulating surface (120) on the plug-in end face (21) is greater than or equal to the area of ​​the plug-in end face (21).

3. The junction box lead wire installation and detection structure according to claim 1, characterized in that, The insulating surface (120) includes a first insulating part (121) and a second insulating part (122) symmetrically arranged about the axis of the probe post (110), wherein the first insulating part (121) or the second insulating part (122) is provided on the side of the outer peripheral surface (111) facing the metal terminal (20).

4. The junction box lead wire installation and detection structure according to claim 3, characterized in that, The insulating surface (120) further includes a connecting portion (123), one end of which is connected to the first insulating portion (121) and the other end of which is connected to the second insulating portion (122).

5. The junction box lead wire installation and detection structure according to claim 4, characterized in that, The connecting part (123) is provided at the insertion end (112) of the probe column (110), and the projected area of ​​the connecting part (123) on the insertion end (112) is smaller than the area of ​​the insertion end (112).

6. The junction box lead wire installation and detection structure according to claim 1, characterized in that, The charged surface (130) is provided with a supporting part (113) that abuts against the wall of the connecting hole (22), and the insulating surface (120) avoids the supporting part (113).

7. The junction box lead wire installation and detection structure according to claim 1, characterized in that, The height of the insulating surface (120) along the axial direction of the probe post (110) is greater than or equal to the depth of the connecting hole (22).

8. The junction box lead wire installation and detection structure according to claim 1, characterized in that, The insulating surface (120) is made of any one of ceramic, glass, mica, rubber, plastic, resin and fiber.

9. A motor testing fixture, characterized in that, It includes a power supply and a detection structure with lead wires installed in the junction box as described in any one of claims 1 to 8, wherein the power supply and the detection post (110) are electrically connected.

10. The motor testing fixture according to claim 9, characterized in that, The detection column (110) is provided with a positioning block (114), the positioning block (114) and the detection column (110) are coaxially arranged, and the peripheral side surface of the positioning block (114) includes at least one positioning plane (115).

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