Junction box for motor

Abstract

The junction box comprises a box body, at least one side of the box body is provided with a wiring hole, a multi-angle wire outlet device is arranged in the wiring hole, a wire passes through the multi-angle wire outlet device, and the angle of the multi-angle wire outlet device can be adjusted and fixed to adapt to the wiring direction of the wire. The end part of the multi-angle wire outlet device is provided with a hooping structure, and the electric wire is fixed through the hooping structure. According to the junction box for the motor, the outlet angle of the electric wire can be adjusted through the multi-angle appearance device, so that the arrangement of the electric wire is facilitated, and the bending angle of the electric wire is not too large; and the wire can be fixed at the end part of the penetrating pipe through the hooping structure, so that the wire can be prevented from being pulled and loosened.

Description

Technical Field

[0001] The utility model relates to the field of power connection boxes, and specifically refers to a wiring box for a motor. Background Art

[0002] The motor wiring box is an important part of the motor, which is mainly used to connect the internal winding of the motor and the external power supply. The wiring box is usually installed at the non-driving end of the motor, that is, the side where the motor has no output shaft. The wiring box contains wiring terminals or other types of connectors to securely connect the power cord to the motor.

[0003] The design of the motor wiring box usually takes into account protection requirements such as waterproof and dustproof to ensure that the motor can work properly under various environmental conditions. According to the type of the motor (such as three-phase motor, single-phase motor) and the different application scenarios, the wiring methods in the wiring box will also be different. For example, in a three-phase motor, there may be three main wiring terminals for connecting the three-phase power supply, and in addition, there may be a grounding terminal for electrical safety protection.

[0004] The outlet end interface of the existing power connection box is usually a simple round hole, or a short pipe is welded on the round hole as the outlet pipe. The sealing effect of this structure is poor, so explosion-proof mud is usually used to seal the pipe orifice after wiring. It is not only unsightly, but also the sharp end of the outlet pipe will scratch the outer skin of the wire, and stuffing the explosion-proof mud cannot fix the wire, and the anti-pulling effect is poor.

[0005] In view of the above, it is necessary to propose a wiring box for a motor to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the above technical problems, and to provide a wiring box for a motor.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: A wiring box for a motor, comprising a box body, at least one side of the box body is provided with a wiring hole, and a multi-angle wire outlet device is arranged in the wiring hole. The wire passes through the multi-angle wire outlet device, and the angle of the multi-angle wire outlet device can be adjusted and fixed to adapt to the wiring direction of the wire; a tightening structure is arranged at the end of the multi-angle wire outlet device to fix the wire through the tightening structure.

[0008] Further, the multi-angle wire outlet device includes a sleeve, a first clamping ring, a second clamping ring, a locking ring, and a through pipe. The sleeve passes through the wiring hole and is sealingly connected therein. The through pipe passes through the sleeve, and a spherical part is arranged on the through pipe. The first clamping ring and the second clamping ring are both sleeved on the through pipe and are respectively located on both sides of the spherical part. The locking ring is screwed to one end of the sleeve and presses and fixes one side clamping ring, so that the first clamping ring and the second clamping ring are pressed against the spherical surface of the spherical part.

[0009] Further, one end of the sleeve forms a reduced-diameter retaining ring, and the other end forms an internal thread. The retaining ring limits a snap ring, and the internal thread is screwed with a locking ring.

[0010] Further, the tightening structure includes an expansion and contraction ring and a tightening nut. One end of the through pipe is provided with an external thread, which is the installation end of the tightening structure. The expansion and contraction ring is arranged inside the tightening nut, and the tightening nut is screwed on the external thread.

[0011] Further, the expansion and contraction ring is axially provided with a perforation for the power line to pass through. One end of the expansion and contraction ring is a conical end, and a plurality of openings are provided on the conical end. The plurality of openings are circumferentially evenly distributed. An internal inclined surface matching the conical end is provided inside the tightening nut.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The junction box for a motor of the present utility model can adjust the outlet angle of the electric wire through the multi-angle outlet device, which is convenient for the layout of the electric wire and will not cause the electric wire to be bent at too large an angle; The electric wire can be fixed at the end of the through pipe through the tightening structure, thereby avoiding the electric wire from being pulled loose. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an isometric view of a junction box for a motor of the present utility model;

[0014] Figure 2 is an exploded view of a junction box for a motor of the present utility model;

[0015] Figure 3 is a cross-sectional view of a junction box for a motor of the present utility model;

[0016] In the figure: 1, box body; 2, wiring hole; 3, multi-angle outlet device; 4, tightening structure; 5, sleeve; 6, first snap ring; 7, second snap ring; 8, locking ring; 9, through pipe; 10, spherical part; 11, retaining ring; 12, internal thread; 13, expansion and contraction ring; 14, tightening nut; 15, external thread; 16, conical end; 17, opening; 18, internal inclined surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0018] The following further illustrates the specific implementation manners of the present utility model in conjunction with the drawings. The same components are denoted by the same reference numerals.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0020] A junction box for a motor, as Figures 1-3 shown, includes a box body 1. At least one side of the box body 1 is provided with a wiring hole 2, and a multi-angle wire outlet 3 is arranged in the wiring hole 2. The wire passes through the multi-angle wire outlet 3, and the angle of the multi-angle wire outlet 3 can be adjusted and fixed to adapt to the wiring direction of the wire; a tightening structure 4 is provided at the end of the multi-angle wire outlet 3, and the wire is fixed through the tightening structure 4. During actual use, the wire can enter the box body 1 by passing through the tightening structure 4 and the multi-angle wire outlet 3 in sequence, so as to be connected to the internal wiring terminal.

[0021] The wire can be fixed by the multi-angle wire outlet 3 in a direction deviating from the axis of the wiring hole 2, so that it can deflect as much as possible towards the wire laying direction, avoiding a 90-degree right-angle bend of the wire outlet, thereby protecting the wire. Specifically, the multi-angle wire outlet 3 includes a sleeve 5, a first snap ring 6, a second snap ring 7, a locking ring 8, and a through pipe 9. The sleeve 5 passes through the wiring hole 2 and is hermetically connected therein. The through pipe 9 passes through the sleeve 5, and a spherical portion 10 is provided on the through pipe 9. The first snap ring 6 and the second snap ring 7 are both sleeved on the through pipe 9 and are respectively located on both sides of the spherical portion 10. The locking ring 8 is screwed onto one end of the sleeve 5 and presses and fixes one snap ring, so that the first snap ring 6 and the second snap ring 7 are pressed against the spherical surface of the spherical portion 10. One end of the sleeve 5 forms a constricted retaining ring 11, and the other end forms an internal thread 12. The retaining ring 11 limits one snap ring, and the internal thread 12 is screwed with the locking ring 8. During actual installation, the first snap ring 6 is first installed into the sleeve 5 and is limited by the snap ring, then the through pipe 9 is inserted into the first snap ring 6, and then the second snap ring 7 is placed into the sleeve 5. The two snap rings are stuck on the spherical portion 10, so that the through pipe 9 forms a universal ball structure by using the spherical portion 10, and the two snap rings are pressed by the locking pipe. Therefore, when adjusting, the locking ring 8 can be loosened, and at this time, the through pipe 9 can be rotated in any direction. After adjustment, the locking ring 8 is tightened for fixation.

[0022] In order to prevent the wiring terminal from becoming loose due to the wire being pulled after installation, a tightening structure 4 is provided in this embodiment, which includes an expansion and contraction ring 13 and a tightening nut 14. An external thread 15 is provided at one end of the through pipe 9, and this external thread 15 is the installation end of the tightening structure 4. The expansion and contraction ring 13 is arranged inside the tightening nut 14, and the tightening nut 14 is screwed onto the external thread 15. During installation, the end of the wire is first passed through the tightening nut 14, the expansion and contraction ring 13, and then through the multi-angle wire outlet 3, and then the tightening nut 14 is screwed onto the external thread 15. Specifically, a through hole for the wire to pass through is axially provided on the expansion and contraction ring 13. One end of the expansion and contraction ring 13 is a tapered end 16, and a plurality of openings 17 are provided on the tapered end 16. The plurality of openings 17 are circumferentially evenly distributed. An internal inclined surface 18 matching the tapered end 16 is provided inside the tightening nut 14. During the process of screwing the tightening nut 14, the internal inclined surface 18 inside it forms an inclined surface sliding fit with the tapered end 16 on the expansion and contraction ring 13, so that the tapered end 16 contracts inward, thereby clamping the wire and fixing it to prevent pulling and loosening.

[0023] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A terminal box for an electric motor, comprising a box body (1), characterized in that, The box body (1) is provided with a wiring hole (2) on at least one side. A multi-angle wire outlet device (3) is arranged in the wiring hole (2). The wire passes through the multi-angle wire outlet device, and the angle of the multi-angle wire outlet device can be adjusted and fixed to adapt to the wiring direction of the wire. A tightening structure (4) is arranged at the end of the multi-angle wire outlet device, and the wire is fixed by the tightening structure (4).

2. The junction box for a motor according to claim 1, characterized in that, The multi-angle wire outlet device includes a sleeve (5), a first clamping ring (6), a second clamping ring (7), a locking ring (8), and a through pipe (9). The sleeve (5) is arranged through the wiring hole (2) and is hermetically connected therein. The through pipe (9) is arranged through the sleeve (5). A spherical part (10) is arranged on the through pipe (9). The first clamping ring (6) and the second clamping ring (7) are both sleeved on the through pipe (9) and are respectively located on both sides of the spherical part (10). The locking ring (8) is screwed at one end of the sleeve (5) and presses and fixes one clamping ring, so that the first clamping ring (6) and the second clamping ring (7) are pressed against the spherical surface of the spherical part (10).

3. The terminal box for a motor according to claim 2, characterized in that, One end of the sleeve (5) forms a reduced-diameter retaining ring (11), and the other end forms an internal thread (12). The retaining ring (11) limits one clamping ring, and the internal thread (12) is screwed with the locking ring (8).

4. The terminal box for a motor according to claim 2, characterized in that, The tightening structure (4) includes an expansion and contraction ring (13) and a tightening nut (14). An external thread (15) is arranged at one end of the through pipe (9), and the external thread (15) is the installation end of the tightening structure (4). The expansion and contraction ring (13) is arranged inside the tightening nut (14), and the tightening nut (14) is screwed on the external thread (15).

5. The terminal box for a motor according to claim 4, wherein, The expansion and contraction ring (13) is axially provided with a through hole for the wire to pass through. One end of the expansion and contraction ring (13) is a tapered end (16), and a plurality of openings (17) are arranged on the tapered end (16). The plurality of openings (17) are circumferentially evenly distributed. An internal inclined surface (18) matched with the tapered end (16) is arranged inside the tightening nut (14).

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