Wire outlet structure of permanent magnet deceleration motor

Abstract

The utility model relates to the outgoing line technical field of motor, concretely is a kind of outgoing line structure of permanent magnet deceleration motor, including junction box, the terminal block for connecting cable in junction box, junction box top end is equipped with box cover by bolt, junction box is installed in permanent magnet deceleration motor main body top end, the top end of box cover is equipped with four groups of through-hole;Beneficial effects are that: when the gland is sleeved on the outer ring of cable, cable passes through through-hole, gland is inserted into through-hole at this time, the protruding part of the top end of gland is blocked, so that gland is clamped in pupil, then rotates mounting sleeve, to advance compression ring, since the bevel of compression ring bottom, advance sealing gasket inward when descending, since the continuous descent of compression ring, so that sealing gasket gradually sticks to cable outer ring, realize extruding sealing gasket, to form seal, multiple glands and through-hole one-to-one correspondence, to seal corresponding cable, avoid multiple groups to prevent gap.

Description

Technical Field

[0001] This utility model relates to the field of motor lead-out wires, specifically to a lead-out wire structure for a permanent magnet geared motor. Background Technology

[0002] The permanent magnet geared motor consists of a housing, rotor assembly, stator assembly, bearings, and reduction mechanism. The stator winding generates a rotating magnetic field that drives the internal permanent magnet rotor to rotate synchronously. The rotor is supported by bearings and transmits power to the reduction mechanism to achieve deceleration output. The stator leads inside the stator are led out from the end of the winding, fixed by a fixing clamp, and connected to the terminal block to realize the input of electrical energy and the external cable lead, thereby driving the permanent magnet geared motor. Of the four wires in the cable, three are connected to three-phase power and the other is grounded.

[0003] However, in the existing technology, when multiple cables pass through a single through hole at the same time, gaps are easily generated between the gasket and the cable, allowing dust or moisture to enter the junction box. Furthermore, when the gasket is inside the through hole and the cable is sealed, the gasket cannot be axially compressed in an adjustable manner, and the gasket cannot flexibly conform to the outer surface of the cable according to the degree of compression, resulting in an unsatisfactory sealing effect. Utility Model Content

[0004] The purpose of this invention is to provide a cable output structure for a permanent magnet geared motor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: it includes a junction box, a terminal block for connecting cables inside the junction box, a cover mounted on the top of the junction box by bolts, the junction box being mounted on the top of the permanent magnet geared motor body, four sets of through holes being opened on the top of the cover, and the diameter of the cable being smaller than the diameter of the through holes, a pressure cap being inserted into the through holes, an installation sleeve being screwed to the top of the pressure cap, a movable groove being opened inside the pressure cap, a pressure ring moving in the movable groove, and a sealing gasket being attached to the bottom of the pressure ring.

[0006] Preferably, the cable is provided in four sets, and the cable and the through hole correspond one-to-one, with the cable passing through the through hole.

[0007] Preferably, the top of the cover is an annular structure with an inverted right trapezoidal cross-section, and the bottom of the cover is an annular structure with a rectangular cross-section. The cover is fitted onto the outer ring of the cable, and the inclined edge of the top of the cover is blocked by a through hole.

[0008] Preferably, the top of the gland has an annular groove, and the mounting sleeve is screwed into the inner ring of the annular groove, with the annular groove and the movable groove communicating.

[0009] Preferably, the top of the movable groove is four sets of connected arc-shaped grooves, and the arc-shaped grooves are arranged in a circular array around the central axis of the pressure cap. The bottom of the movable groove is a connected annular structure. The pressure ring moves up and down in the movable groove, and the shape of the pressure ring is the same as that of the movable groove. The circular groove at the bottom of the movable groove penetrates the inner wall of the pressure cap.

[0010] Preferably, the inner wall of the movable groove is provided with a protrusion, one end of a spring is fixed to the bottom surface of the protrusion, the other end of the spring is fixed to the lower surface of the protrusion of the pressure ring, the protrusion is fixed to the surface of the pressure ring, and the protrusion is movably connected in the protrusion.

[0011] Preferably, the bottom end of the pressure ring is an annular structure with a right-angled triangular cross-section, with the hypotenuse of the pressure ring facing the sealing gasket. Both the hypotenuse of the pressure ring and the sealing gasket are located in the annular groove at the bottom end.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The cable outlet structure of the permanent magnet geared motor proposed in this utility model involves placing a pressure cap on the outer ring of the cable. The cable passes through a through hole, and the pressure cap is inserted into the through hole. The protruding part of the pressure cap's top is blocked, causing the pressure cap to be locked in the through hole. Then, rotating the mounting sleeve pushes the pressure ring forward. Due to the beveled edge at the bottom of the pressure ring, the sealing gasket is pushed inward as it descends. As the pressure ring continues to descend, the sealing gasket gradually adheres to the outer ring of the cable, achieving compression and forming a seal. Multiple pressure caps and through holes correspond one-to-one, thus sealing the corresponding cables. This avoids multiple cables passing through a single through hole, which could cause gaps due to the flexibility between the cables, affecting the sealing effect. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 A schematic diagram of the internal structure of the junction box in the diagram; Figure 3 This is a schematic diagram of the cap structure of this utility model; Figure 4 This utility model Figure 3 Mid-top view of the structure; Figure 5 This utility model Figure 4 Schematic diagram of the cross-sectional structure along the middle AA direction; Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the internal disassembly structure of the pressure cap of this utility model.

[0013] In the diagram: 1. Main body of permanent magnet geared motor; 2. Junction box; 3. Box cover; 4. Through hole; 5. Cable; 6. Terminal block; 7. Pressure cover; 8. Mounting sleeve; 9. Moving groove; 10. Pressure ring; 11. Sealing gasket; 12. Raised groove; 13. Spring; 14. Raised block. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Example 1 Please see Figures 1-7 This utility model provides a technical solution: a wiring structure for a permanent magnet geared motor, including a junction box 2, a terminal block 6 for connecting a cable 5 inside the junction box 2, a cover 3 installed on the top of the junction box 2 by bolts, and the junction box 2 is installed on the top of the permanent magnet geared motor body 1. Specifically, the permanent magnet geared motor body 1 consists of a housing, rotor assembly, stator assembly, bearings, and reduction mechanism. The stator assembly is composed of a stator core and three-phase symmetrical windings. The reduction mechanism is a planetary gear reduction mechanism. An external three-phase AC power supply is connected to a terminal block 6 via a cable 5. The stator leads at the other end of the terminal block 6 are fed into the stator windings, generating a rotating magnetic field inside the stator, which drives the permanent magnets embedded in the internal rotor assembly to rotate synchronously. The rotor assembly is precisely supported and runs smoothly within the housing by bearings at both ends. The high-speed rotation of the rotor is transmitted through the output shaft. The reduction mechanism, which is tightly connected to the housing, converts the high-speed, low-torque output of the rotor into a low-speed, high-torque output through a planetary gear reduction mechanism. Finally, the output is sent to the external load through the mounting flange. At the same time, the heat dissipation ribs and sealing structure on the outside of the housing ensure that the motor has good heat dissipation and sealing performance during long-term operation, thereby ensuring that the whole machine safely and efficiently converts electrical energy into stable mechanical energy output. The reduction mechanism uses multiple meshing sun gears, planet gears and internal gear rings to effectively convert the high-speed, low-torque output of the rotor into a low-speed, high-torque output by utilizing the rotation and revolution of the planet gears. To reiterate, according to Figure 1 and Figure 2 It can be seen that the permanent magnet geared motor body 1 is a three-phase four-wire motor, in which three wires are connected to the three-phase power supply and the other set of wires is grounded. The permanent magnet geared motor body 1 adopts the model of YEJ series permanent magnet synchronous geared motor, such as YEJ80-4.

[0016] Example 2 Based on Embodiment 1, to prevent gaps when the cable 5 passes through the through hole 4, four sets of through holes 4 are provided at the top of the cover 3. The diameter of the cable 5 is smaller than the diameter of the through hole 4. There are four sets of cables 5, and each cable 5 corresponds to one through hole 4. The cable 5 passes through the through hole 4, and a pressure cap 7 is inserted into the through hole 4. The top of the pressure cap 7 is a ring structure with an inverted right trapezoidal cross-section, and the bottom of the pressure cap 7 is a ring structure with a rectangular cross-section. The pressure cap 7 is fitted onto the outer ring of the cable 5. The inclined edge of the top of the pressure cap 7 is blocked by the through hole 4. An installation sleeve 8 is screwed into the top of the inner part of the pressure cap 7. A moving groove 9 is provided inside the pressure cap 7. A pressure ring 10 moves within the moving groove 9. An annular groove is provided inside the top of the pressure cap 7. The installation sleeve 8 is screwed into the inner ring of the annular groove. The annular groove and the moving groove 9 are connected. The top of the moving groove 9... The end has four sets of connected arc-shaped grooves, and the arc-shaped grooves are arranged in a circular array around the central axis of the pressure cover 7. The bottom end of the moving groove 9 is a connected circular ring structure. The pressure ring 10 moves up and down in the moving groove 9, and the shape of the pressure ring 10 is the same as that of the moving groove 9. The circular groove at the bottom of the moving groove 9 penetrates the inner wall of the pressure cover 7. The inner wall of the moving groove 9 is provided with a protrusion 12. One end of the spring 13 is fixed on the bottom surface of the protrusion 12. The other end of the spring 13 is fixed on the lower surface of the protrusion 14 of the pressure ring 10. The protrusion 14 is fixed on the surface of the pressure ring 10, and the protrusion 14 is movably connected in the protrusion 12. The bottom end of the pressure ring 10 is attached to the sealing gasket 11. The bottom end of the pressure ring 10 is a ring structure with a right-angled triangle cross section. The hypotenuse of the pressure ring 10 faces the sealing gasket 11. The hypotenuse of the pressure ring 10 and the sealing gasket 11 are both located in the circular groove at the bottom end. Specifically, when the pressure cap 7 is placed on the outer ring of the cable 5, the cable 5 passes through the through hole 4. At this time, the pressure cap 7 is inserted into the through hole 4, and the protruding part of the top of the pressure cap 7 is blocked, so that the pressure cap 7 is stuck in the through hole 4. Then, the mounting sleeve 8 is rotated to push the pressure ring 10. Due to the inclined edge at the bottom of the pressure ring 10, the sealing gasket 11 is pushed inward as it descends. As the pressure ring 10 continues to descend, the sealing gasket 11 gradually fits against the outer ring of the cable 5, thereby squeezing the sealing gasket 11 and forming a seal. Multiple sets of pressure caps 7 and through holes 4 correspond one-to-one, thereby sealing the corresponding cables 5 and preventing multiple sets of cables 5 from passing through a single through hole 4. Due to the toughness between the cables 5, gaps may appear, affecting the sealing effect. Finally, the bottom end of the cable 5 is connected to the terminal block 6, the box cover 7 is closed, and it is installed with bolts. To reiterate, the sealing gasket 11 axially compresses the cable 5 only when the pressure ring 10 is pressed down by the mounting sleeve 8, thus achieving a sealing effect. When it needs to be unsealed, the mounting sleeve 8 is rotated in the reverse thread. As the bottom end of the mounting sleeve 8 disengages from the top end of the pressure ring 10, the elastic force of the spring 13 in the groove 12 rebounds the pressure ring 10, restoring the pressure ring to its original position, and then the sealing gasket 11 disengages from the cable 5.

[0017] In use, when the pressure cap 7 is placed on the outer ring of the cable 5, the cable 5 passes through the through hole 4. At this time, the pressure cap 7 is inserted into the through hole 4, and the protruding part of the top of the pressure cap 7 is blocked, so that the pressure cap 7 is stuck in the through hole 4. Then, the mounting sleeve 8 is rotated to push the pressure ring 10. Due to the beveled edge at the bottom of the pressure ring 10, the sealing gasket 11 is pushed inward as it descends. As the pressure ring 10 continues to descend, the sealing gasket 11 gradually fits against the outer ring of the cable 5, thereby squeezing the sealing gasket 11 and forming a seal. Multiple sets of pressure caps 7 and through holes 4 correspond one-to-one, thereby sealing the corresponding cables 5 and preventing multiple sets of cables 5 from passing through a single through hole 4. Due to the toughness between the cables 5, gaps may appear, affecting the sealing effect. Finally, the bottom end of the cable 5 is connected to the terminal block 6, the cover 7 is closed, and it is installed with bolts.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wiring structure for a permanent magnet geared motor, comprising a junction box (2), a terminal block (6) for connecting a cable (5) inside the junction box (2), a cover (3) bolted to the top of the junction box (2), and the junction box (2) mounted on the top of the permanent magnet geared motor body (1), characterized in that: The top of the cover (3) is provided with four sets of through holes (4), and the diameter of the cable (5) is smaller than the diameter of the through holes (4). A pressure cap (7) is inserted into the through hole (4), and an installation sleeve (8) is screwed into the top of the pressure cap (7). A moving groove (9) is provided in the pressure cap (7), and a pressure ring (10) moves in the moving groove (9). A sealing gasket (11) is attached to the bottom of the pressure ring (10).

2. The output cable structure of a permanent magnet geared motor according to claim 1, characterized in that: The cable (5) is provided in four sets, and the cable (5) and the through hole (4) correspond one-to-one, with the cable (5) passing through the through hole (4).

3. The output cable structure of a permanent magnet geared motor according to claim 1, characterized in that: The top of the cover (7) is a ring structure with an inverted right trapezoidal cross section, and the bottom of the cover (7) is a ring structure with a rectangular cross section. The cover (7) is fitted on the outer ring of the cable (5), and the oblique edge of the top of the cover (7) is blocked by the through hole (4).

4. The output cable structure of a permanent magnet geared motor according to claim 1, characterized in that: The top of the inner end of the pressure cap (7) is provided with an annular groove, and the mounting sleeve (8) is screwed into the inner ring of the annular groove. The annular groove and the moving groove (9) are connected.

5. The output cable structure of a permanent magnet geared motor according to claim 1, characterized in that: The top of the moving groove (9) is four sets of connected arc-shaped grooves, and the arc-shaped grooves are arranged in a circular array around the central axis of the pressure cover (7). The bottom of the moving groove (9) is a connected circular ring structure. The pressure ring (10) moves up and down in the moving groove (9), and the shape of the pressure ring (10) is the same as that of the moving groove (9). The circular groove at the bottom of the moving groove (9) penetrates the inner wall of the pressure cover (7).

6. The output cable structure of a permanent magnet geared motor according to claim 1, characterized in that: The inner wall of the movable groove (9) is provided with a protrusion (12). One end of a spring (13) is fixed on the bottom surface of the protrusion (12). The other end of the spring (13) is fixed on the lower surface of the protrusion (14) of the pressure ring (10). The protrusion (14) is fixed on the surface of the pressure ring (10) and is movably connected in the protrusion (12).

7. The output cable structure of a permanent magnet geared motor according to claim 5, characterized in that: The bottom end of the pressure ring (10) is a ring structure with a right-angled triangle cross section. The hypotenuse of the pressure ring (10) faces the sealing gasket (11). Both the hypotenuse of the pressure ring (10) and the sealing gasket (11) are located in the annular groove at the bottom end.

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