Leading-out wire waterproof structure of centrally-mounted motor

Abstract

The utility model relates to a leading-out wire waterproof structure of a centrally-mounted motor, which comprises a casing, an end cover, a plurality of leading-out wires, a rubber plug fixing cover and a plurality of rubber plugs, the end cover is covered on the casing, the rubber plugs are mounted on the casing or the end cover through the rubber plug fixing cover, and end portions of the leading-out wires are arranged in the rubber plugs in a penetrating manner. A plurality of first annular protrusions are arranged on the inner circumferential face of the rubber plug and make contact with the outer circumferential face of the outgoing line. The two ends of the rubber plug are a first end face and a second end face respectively, a first circular ring, a second annular protrusion and a second circular ring are sequentially arranged on the rubber plug, the diameter of the second circular ring is larger than that of the first circular ring, the diameter of the first circular ring is larger than that of the second annular protrusion, and the side face of the second circular ring is a positioning face. According to the utility model, the occupied space is small, and the sealing between the leading-out wire and the casing or the end cover can be completed in a smaller space; and a plurality of annular sealing structures are formed between the outgoing line and the inner circumferential surface of the rubber plug by arranging a plurality of first annular bulges, so that the sealing and waterproof effects are good.

Description

Technical Field

[0001] The utility model relates to a waterproof structure for lead-out wires of a center-mounted motor, belonging to the technical field of center-mounted motors. Background Art

[0002] For motors working in humid or outdoor environments, there are connection gaps at the connection position of the motor lead wires, which are easy to seep water, causing water to enter the motor and become damp, causing the motor to short-circuit and burn, and low safety. The existing lead wire waterproofing solutions are mostly to use cable glands to wrap the lead wires for waterproofing and to add rubber plugs to the openings on the casing to wrap the lead wires for waterproofing, but the cable glands occupy a large space, the existing rubber plugs have poor waterproofing effects, and the existing rubber plug waterproofing solutions require slots to be opened between the end cover and the casing to install the rubber plugs, which in turn affects the seal between the end cover and the casing. Utility Model Content

[0003] The utility model aims to provide a waterproof structure for lead-out wires of a central motor with good sealing and waterproof effects in view of the shortcomings of the prior art.

[0004] To achieve the purpose, the technical solution adopted by the utility model is:

[0005] A lead wire waterproof structure for a mid-mounted motor comprises a casing, an end cover and a plurality of lead wires, wherein the end cover is arranged on the casing, and further comprises a rubber plug fixing cover and a plurality of rubber plugs, wherein the rubber plug is installed on the casing or the end cover through the rubber plug fixing cover, and the end of the lead wire is inserted into the rubber plug, and the inner circumference of the rubber plug is provided with a plurality of first annular protrusions, and the first annular protrusions are in contact with the outer circumference of the lead wire.

[0006] As a further optimization of the above technical solution: the two ends of the rubber plug are respectively a first end face and a second end face, and the rubber plug is also provided with a first ring, a second annular protrusion, and a second ring in sequence, the diameter of the second ring is larger than the diameter of the first ring, the diameter of the first ring is larger than the diameter of the second annular protrusion, and the side of the second ring is a positioning surface.

[0007] As a further optimization of the above technical solution: a plurality of mounting grooves are formed on the rubber plug fixing cover, the bottom of the mounting groove is a second step, a through hole is formed on the second step, the rubber plug is located in the mounting groove, and the rubber plug fixing cover is fixed to the casing or the end cover by a first screw.

[0008] As a further optimization of the above technical solution: a small hole and a large hole are formed on the casing or the end cover, a first step is formed between the large hole and the small hole, the end of the rubber plug is located in the large hole, and the two ends of the rubber plug are respectively in contact with the second step and the first step, the rubber plug seals the installation between the lead wire and the rubber plug fixing cover, and the installation between the lead wire and the casing or the end cover, and the two ends of the lead wire pass through the through hole and the small hole respectively.

[0009] As a further optimization of the above technical solution: the height of the rubber plug is greater than the distance between the second step and the first step.

[0010] As a further optimization of the above technical solution: a circular hole is provided on the side surface of the rubber plug fixing cover, the circular hole is communicated with the mounting groove, and after tightening the first screw, sealant is injected from the circular hole into the cavity between the mounting groove and the rubber plug.

[0011] As a further optimization of the above technical solution: an insert ring is formed on the inner circumferential surface of the end cover, a sealing ring groove is formed on the outer side surface of the insert ring, an O-ring is arranged in the sealing ring groove, the end cover is arranged on the casing, the insert ring is inserted into the casing, the end cover and the casing are locked by a second screw, the side surface of the insert ring and the end face of the end cover are both tightly attached to the casing, and the O-ring seals the installation between the end cover and the casing.

[0012] As a further optimization of the above technical solution: the first end face of the rubber plug is in contact with the second step, the second annular protrusion and the first circular ring are in contact with the groove wall of the mounting groove, the second circular ring of the rubber plug is located in the large hole of the housing, the side surface of the rubber plug fixing cover is in contact with the positioning surface of the rubber plug, and the second end face is in contact with the first step.

[0013] As a further optimization of the above technical solution: the depth of the large hole is much smaller than the height of the second circular ring, and an avoidance step is further provided on the rubber plug fixing cover, and the avoidance step is in contact with the positioning surface.

[0014] As a further optimization of the above technical solution: the first ring is located in the large hole and contacts the hole wall of the large hole, the first step is inclined, a guide slope is formed on the first end face of the rubber plug, the guide slope contacts the first step, and the second end face contacts the second step.

[0015] As a further optimization of the above technical solution: the multiple installation grooves are interconnected through the middle groove, and the depths of the multiple installation grooves are different, so that the multiple rubber plugs are staggered. The second ring of one rubber plug is located above the second ring of an adjacent rubber plug, and the two adjacent rubber plugs are tightly attached to each other.

[0016] As a further optimization of the above technical solution: a plurality of the rubber plugs are integrally formed.

[0017] Compared with the prior art, the utility model occupies less space and realizes sealing between the lead-out wire and the housing or the end cover in a smaller space; multiple first annular protrusions are arranged to form multiple annular sealing structures between the lead-out wire and the inner peripheral surface of the rubber plug, and the sealing and waterproofing effect is good; the height of the rubber plug is greater than the distance between the second step and the first step. When the first screw is locked, the rubber plug fixing cover presses the rubber plug, and the two ends of the rubber plug are respectively in contact with the second step and the first step, so that the contact between the rubber plug fixing cover and the rubber plug, the housing or the end cover and the rubber plug is more sufficient, so as to achieve a better sealing and waterproofing effect; because the lead-out wire is inserted into the rubber plug fixing cover, the lead-out wire The diameter will cause the expansion of the rubber plug fixing cover, and because the rubber plug fixing cover squeezes the rubber plug, the rubber plug further expands, so that the side of the rubber plug contacts the groove wall of the mounting groove; the sealant is injected from the circular hole into the cavity between the mounting groove and the rubber plug to seal the rubber plug fixing cover and the rubber plug, thereby improving the waterproof effect and solving the problem of insufficient expansion of the rubber plug and insufficient contact surface with the mounting groove when the outer diameter of the lead wire is insufficient; at the same time, there is no need to open a groove between the end cover and the casing to lead out the lead wire, so that on the premise of waterproofing the end of the lead wire, an insert ring and an O-ring can be made between the end cover and the casing for sealing, thereby greatly improving the waterproof performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic cross-sectional structure diagram of the first embodiment of the utility model.

[0020] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the rubber plug in the utility model.

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the rubber plug fixing cover in the first embodiment of the utility model.

[0023] Figure 6 It is another cross-sectional structural schematic diagram of the first embodiment of the utility model.

[0024] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0025] Figure 8 It is a schematic cross-sectional structure diagram of the second embodiment of the utility model.

[0026] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure at point C in the middle.

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the rubber plug fixing cover in the second embodiment of the utility model. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figure 1-10 As shown, a waterproof structure for lead wires of a central motor includes a housing 1, a rubber plug fixing cover 3, an end cover 4, a plurality of lead wires 5, and a plurality of rubber plugs 6. The end cover 4 is mounted on the housing 1. The rubber plug 6 is mounted on the housing 1 or the end cover 4 through the rubber plug fixing cover 3. The end of the lead wire 5 is inserted into the rubber plug 6. Figure 1-10 The middle rubber plug fixing cover 3 is installed on the housing 1. The inner circumference of the rubber plug 6 is provided with a plurality of first annular protrusions 66, and the first annular protrusions 66 are in contact with the outer circumference of the lead wire 5, so that the first annular protrusions 66 and the outer circumference of the lead wire 5 are in a sealed state. The plurality of first annular protrusions 66 form a plurality of annular sealing structures between the lead wire 5 and the inner circumference of the rubber plug 6, and the sealing effect is good.

[0029] In the above technical solution: Figure 4 As shown, the two ends of the rubber plug 6 are respectively a first end face 67 and a second end face 61. The rubber plug 6 is also provided with a first circular ring 64, a second annular protrusion 63, and a second circular ring 62 in sequence. The diameter of the second circular ring 62 is larger than the diameter of the first circular ring 64, and the diameter of the first circular ring 64 is larger than the diameter of the second annular protrusion 63. The side surface of the second circular ring 62 is a positioning surface 68.

[0030] In the above technical scheme: a plurality of mounting grooves 34 are formed on the rubber plug fixing cover 3, the bottom of the mounting groove 34 is a second step 36, and a through hole 32 is formed on the second step 36. The rubber plug 6 is located in the mounting groove 34. The rubber plug fixing cover 3 is fixed to the housing 1 or the end cover 4 by the first screw 2. The housing 1 or the end cover 4 is formed with a small hole 13 and a large hole 11, and a first step 12 is formed between the large hole 11 and the small hole 13, and the end of the rubber plug 6 is located in the large hole 11. The height of the rubber plug 6 is greater than the distance between the second step 36 and the first step 12. When the first screw 2 is locked, the rubber plug fixing cover 3 presses the rubber plug 6, and the two ends of the rubber plug 6 are in contact with the second step 36 and the first step 12 respectively. The rubber plug 6 seals the installation between the lead wire 5 and the rubber plug fixing cover 3, and the installation between the lead wire 5 and the housing 1 or the end cover 4. The two ends of the lead wire 5 pass through the through hole 32 and the small hole 13 respectively. Since the lead wire 5 is inserted into the rubber plug fixing cover 3 , the diameter of the lead wire 5 will cause the rubber plug fixing cover 3 to expand. Since the rubber plug fixing cover 3 squeezes the rubber plug 6 , the rubber plug 6 further expands, causing the side surface of the rubber plug 6 to contact the groove wall of the installation groove 34 .

[0031] In the above technical solution: Figure 5 , 10 As shown, a circular hole 31 is provided on the side surface of the rubber plug fixing cover 3; the circular hole 31 is communicated with the mounting groove 34; after the first screw 2 is tightened, sealant is injected from the circular hole 31 into the cavity between the mounting groove 34 and the rubber plug 6 to seal the rubber plug fixing cover 3 and the rubber plug 6, thereby improving the waterproof effect and solving the problem that when the outer diameter of the lead-out wire 5 is insufficient, the rubber plug 6 is insufficiently expanded and the contact surface with the mounting groove 34 is insufficient.

[0032] In the above technical solution: Figure 1 , 6 As shown in Figures 1 and 2, an insert ring 41 is formed on the inner circumference of the end cover 4, a sealing ring groove 42 is formed on the outer side of the insert ring 41, an O-ring 7 is arranged in the sealing ring groove 42, the end cover 4 is placed on the housing 1, and the insert ring 41 is inserted into the housing 1. The end cover 4 and the housing 1 are locked by a second screw 8, the side of the insert ring 41 and the end face of the end cover 4 are both in close contact with the housing 1, and the O-ring 7 seals the installation between the end cover 4 and the housing 1. When the width of the edge of the end cover 4 is sufficient, the rubber plug 6 is installed on the end cover 4 through the rubber plug fixing cover 3, and the installation of the rubber plug fixing cover 3 will not affect the sealing connection between the end cover 4 and the housing 1.

[0033] In the first embodiment:

[0034] The rubber plug 6 is inverted in the installation groove 34, the first end face 67 of the rubber plug 6 is in contact with the second step 36, and the second annular protrusion 63 and the first circular ring 64 are in contact with the groove wall of the installation groove 34. The installation between the lead wire 5 and the rubber plug fixing cover 3 is sealed by the extrusion deformation of the first annular protrusion 66, the second annular protrusion 63, and the first circular ring 64 on the rubber plug 6. The second circular ring 62 of the rubber plug 6 is located in the large hole 11, and the rubber plug fixing cover 3 squeezes the second circular ring 62, so that the side of the rubber plug fixing cover 3 is in contact with the positioning surface 68 of the rubber plug 6, and the second end face 61 is in contact with the first step 12, so that the rubber plug fixing cover 3 and the rubber plug 6, the housing 1 or the end cover 4 and the rubber plug 6 are in contact more fully, achieving a sealing effect. Because the first annular protrusion 66 is in contact with the outer peripheral surface of the lead wire 5, the installation between the lead wire 5 and the housing 1 or the end cover 4 is sealed by the extrusion deformation of the second circular ring 62 and the first annular protrusion 66 on the rubber plug 6.

[0035] In the above technical solution: when the depth of the large hole 11 is much smaller than the height of the second ring 62, the depth of the large hole 11 is too small to effectively compress the height of the second ring 62, so an avoidance step 37 is also provided on the plug fixing cover 3, and the avoidance step 37 is in contact with the positioning surface 68.

[0036] In the second embodiment:

[0037] The rubber plug 6 is located in the installation groove 34, and the first ring 64 is located in the large hole 11 and contacts the hole wall of the large hole 11. The first step 12 is inclined, and a guide slope 65 is formed on the first end face 67 of the rubber plug 6. The inclination angle of the guide slope 65 is similar to the inclination angle of the first step 12. The rubber plug fixing cover 3 squeezes the rubber plug 6, the second end face 61 contacts the second step 36, and the guide slope 65 contacts the first step 12, so that the rubber plug 6 can seal the installation between the lead wire 5 and the rubber plug fixing cover 3, and the installation between the lead wire 5 and the housing 1.

[0038] The above technical solution: multiple installation grooves 34 are interconnected through the middle groove. The depths of the multiple installation grooves 34 are different, so that the multiple rubber plugs 6 are installed in a staggered manner, and the second ring 62 of one rubber plug 6 is located above the second ring 62 of the adjacent rubber plug 6. The two adjacent rubber plugs 6 are closely attached to each other, thereby shortening the distance between the two adjacent lead wires 5, making the total width of the lead wire smaller, and reducing the occupied space. At this time, since the multiple rubber plugs 6 are closely attached to each other, the multiple rubber plugs 6 can be molded into one piece, so that a combined rubber plug is put on the multiple lead wires 5, and the sealing effect is good.

[0039] The utility model occupies a small space and realizes sealing between the lead wire 5 and the housing 1 or the end cover 4 in a small space; multiple first annular protrusions 66 are arranged to form multiple annular sealing structures between the lead wire 5 and the inner circumference of the rubber plug 6, and the sealing and waterproofing effect is good; the height of the rubber plug 6 is greater than the distance between the second step 36 and the first step 12, and when the first screw 2 is locked, the rubber plug fixing cover 3 presses the rubber plug 6, and the two ends of the rubber plug 6 are respectively in contact with the second step 36 and the first step 12, so that the contact between the rubber plug fixing cover 3 and the rubber plug 6, and the housing 1 or the end cover 4 and the rubber plug 6 is more sufficient, so as to achieve a better sealing and waterproofing effect; because the lead wire 5 is inserted into the rubber plug fixing cover 3, the diameter of the lead wire 5 It will cause the expansion of the plug fixing cover 3, and because the plug fixing cover 3 squeezes the plug 6, the plug 6 further expands, so that the side of the plug 6 contacts the groove wall of the mounting groove 34; the sealant is injected from the circular hole 31 into the cavity between the mounting groove 34 and the plug 6, and the plug fixing cover 3 and the plug 6 are sealed to improve the waterproof effect, which solves the problem that when the outer diameter of the lead-out wire 5 is insufficient, the plug 6 does not expand enough and the contact surface with the mounting groove 34 is insufficient; at the same time, there is no need to open a groove between the end cover 4 and the casing to lead out the lead-out wire, so that under the premise of waterproofing the end of the lead-out wire, an insertion ring 41 and an O-ring 7 can be made between the end cover 4 and the casing 1 for sealing, which greatly improves the waterproof performance of the motor.

[0040] The preferred specific embodiments of the present utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should fall within the protection scope of the present utility model.

Claims

1. A waterproof structure for lead wires of a mid-mounted motor, comprising a housing (1), an end cover (4) and a plurality of lead wires (5), wherein the end cover (4) is disposed on the housing (1), and is characterized in that It also comprises a rubber plug fixing cover (3) and a plurality of rubber plugs (6), wherein the rubber plug (6) is mounted on the housing (1) or the end cover (4) through the rubber plug fixing cover (3), the end of the lead wire (5) is inserted into the rubber plug (6), and the inner circumference of the rubber plug (6) is provided with a plurality of first annular protrusions (66), and the first annular protrusions (66) are in contact with the outer circumference of the lead wire (5).

2. The waterproof structure for lead wires of a mid-mounted motor according to claim 1, characterized in that The two ends of the rubber plug (6) are respectively a first end face (67) and a second end face (61). The rubber plug (6) is also provided with a first circular ring (64), a second annular protrusion (63), and a second circular ring (62) in sequence. The diameter of the second circular ring (62) is greater than the diameter of the first circular ring (64). The diameter of the first circular ring (64) is greater than the diameter of the second annular protrusion (63). The side surface of the second circular ring (62) is a positioning surface (68).

3. The waterproof structure for lead wires of a mid-mounted motor according to claim 2, characterized in that The rubber plug fixing cover (3) is formed with a plurality of mounting grooves (34), the bottom of the mounting grooves (34) is a second step (36), a through hole (32) is formed on the second step (36), the rubber plug (6) is located in the mounting grooves (34), and the rubber plug fixing cover (3) is fixed to the housing (1) or the end cover (4) by a first screw (2); The housing (1) or the end cover (4) is provided with a small hole (13) and a large hole (11); a first step (12) is formed between the large hole (11) and the small hole (13); an end of the rubber plug (6) is located in the large hole (11); two ends of the rubber plug (6) are in contact with the second step (36) and the first step (12) respectively; the rubber plug (6) seals the installation between the lead wire (5) and the rubber plug fixing cover (3) and the installation between the lead wire (5) and the housing (1) or the end cover (4); and the two ends of the lead wire (5) pass through the through hole (32) and the small hole (13) respectively.

4. The waterproof structure for lead wires of a mid-mounted motor according to claim 3, characterized in that The height of the rubber plug (6) is greater than the distance between the second step (36) and the first step (12).

5. The waterproof structure for lead wires of a mid-mounted motor according to claim 3, characterized in that The upper side of the rubber plug fixing cover (3) is provided with a circular hole (31), and the circular hole (31) is communicated with the mounting groove (34). After the first screw (2) is tightened, sealing glue is injected from the circular hole (31) into the cavity between the mounting groove (34) and the rubber plug (6).

6. The waterproof structure for lead wires of a mid-mounted motor according to claim 3, characterized in that The inner circumferential surface of the end cover (4) is provided with an insert ring (41), the outer side surface of the insert ring (41) is provided with a sealing ring groove (42), an O-ring (7) is arranged in the sealing ring groove (42), the end cover (4) is mounted on the housing (1), the insert ring (41) is inserted into the housing (1), the end cover (4) and the housing (1) are locked by a second screw (8), the side surface of the insert ring (41) and the end surface of the end cover (4) are both in close contact with the housing (1), and the O-ring (7) seals the installation between the end cover (4) and the housing (1).

7. A waterproof structure for lead wires of a mid-mounted motor according to any one of claims 3 to 6, characterized in that The first end face (67) of the rubber plug (6) is in contact with the second step (36), the second annular protrusion (63) and the first circular ring (64) are in contact with the groove wall of the mounting groove (34), the second circular ring (62) of the rubber plug (6) is located in the large hole (11) of the housing (1), the side surface of the rubber plug fixing cover (3) is in contact with the positioning surface (68) of the rubber plug (6), and the second end face (61) is in contact with the first step (12).

8. The waterproof structure for lead wires of a mid-mounted motor according to claim 7, characterized in that The depth of the large hole (11) is much smaller than the height of the second circular ring (62). The rubber plug fixing cover (3) is also provided with an avoidance step (37), and the avoidance step (37) is in contact with the positioning surface (68).

9. A waterproof structure for lead wires of a mid-mounted motor according to any one of claims 3 to 6, characterized in that The first circular ring (64) is located in the large hole (11) and contacts the hole wall of the large hole (11); the first step (12) is arranged obliquely; a guide slope (65) is formed on the first end surface (67) of the rubber plug (6); the guide slope (65) contacts the first step (12); and the second end surface (61) contacts the second step (36).

10. The waterproof structure for lead wires of a mid-mounted motor according to claim 9, characterized in that The plurality of mounting grooves (34) are interconnected through the middle groove, and the depths of the plurality of mounting grooves (34) are different, so that the plurality of rubber plugs (6) are installed in a staggered manner, wherein the second ring (62) of one rubber plug (6) is located above the second ring (62) of an adjacent rubber plug (6), and the two adjacent rubber plugs (6) are closely attached to each other; The plurality of rubber plugs (6) are integrally formed.

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