Cable sealing sleeve, cable joint unit and electric device

Abstract

The utility model provides a cable sealing sleeve, a cable joint unit and an electric device, the cable sealing sleeve comprises a sealing sleeve main body and a sealing sleeve limiting part, the sealing sleeve main body is provided with a conical cable sealing hole, and the diameter of a cable outlet of the cable sealing hole is smaller than that of a cable. The cable sealing sleeve is embedded in the mounting hole of the base in a sealing manner, so that the cable and the cable sealing sleeve can be sealed through interference fit, the cable sealing sleeve is embedded in the mounting hole of the base in a sealing manner, the cable and the base can be sealed practically, and the cable sealing hole is a conical hole, so that the contact area between the cable sealing hole and the cable is large. Therefore, damage to the surface layer of the cable caused by overlarge pressure on the upper part of the cable can be avoided, and the long-term sealing effect is ensured. Furthermore, the sealing sleeve limiting part is fixedly connected with the machine base, so that the cable sealing sleeve can be fixed and limited, the cable sealing sleeve cannot rotate, shift and the like due to pulling of the cable, and the long-term sealing effect is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable sealing devices, and in particular relates to a cable sealing sleeve, a cable joint unit and an electrical device. Background Art

[0002] In some electrical devices, in order to prevent external water, water vapor or dust from entering the base and affecting the electronic components inside the base and to ensure the normal operation of the electrical device, it is necessary to seal the connection position between the cable supplying power to the electrical device and the base of the electrical device.

[0003] A cable sealing structure commonly used in the prior art mainly includes an elastic sealing sleeve and a hollow clamping bolt. The sealing sleeve is embedded in the mounting hole of the machine base, and the sealing sleeve and the machine base are sealed. The cable passes through the sealing ring and the hollow clamping bolt to penetrate into the inside of the machine base, and the cable is clamped and fixed by the hollow clamping bolt. That is, in this cable sealing structure, the sealing sleeve is the main component for achieving cable sealing. The inner surface of the sealing sleeve is usually provided with one or more circles of annular protrusions. After the cable passes through the sealing sleeve, the annular protrusions will be pressed on the outer surface of the cable, thereby achieving sealing between the cable and the sealing sleeve. Since the pressure applied by the sealing sleeve to the cable is relatively large, and the contact area between the sealing sleeve and the cable is very small (only the protrusions are in contact with the outer surface of the cable), the protrusions on the sealing sleeve will cause great pressure on the sheath on the surface of the cable. Over time, the sheath surface of the cable will produce grooves or even cracks due to the pressure, which affects the sealing effect of the cable and brings safety hazards. Utility Model Content

[0004] The utility model is designed to solve the above problems and aims to provide a cable sealing sleeve, a cable joint unit and an electrical device using the cable joint unit, which can effectively and permanently seal and connect the cable to the base of the electrical device. The utility model adopts the following technical solutions:

[0005] The utility model provides a cable sealing sleeve, characterized in that it comprises: a sealing sleeve main body, sealingly embedded in the installation hole; and a sealing sleeve limiting portion, fixedly connected to the machine base, and used for limiting the sealing sleeve main body, wherein the sealing sleeve main body has a conical and through cable sealing hole, and the two ends of the cable sealing hole are respectively a cable inlet and a cable outlet, and the diameter of the cable outlet is smaller than the diameter of the cable inlet, and smaller than the diameter of the cable.

[0006] The cable sealing sleeve provided by the utility model may also have such technical features, wherein the sealing sleeve body comprises: a first extrusion portion, which is cylindrical; and a second extrusion portion, which is truncated cone-shaped, wherein an end of the second extrusion portion with a larger outer diameter is connected to an end of the first extrusion portion, the cable outlet is located on the outer end portion of the first extrusion portion, and the cable inlet is located on the outer end portion of the second extrusion portion.

[0007] The cable sealing sleeve provided by the utility model may also have such a technical feature, wherein the diameter of the cable inlet is equal to the diameter of the cable.

[0008] The cable sealing sleeve provided by the utility model may also have such a technical feature, wherein the outer diameter of the end with a larger outer diameter of the second extruded portion is consistent with the outer diameter of the first extruded portion, and the axial length of the second extruded portion is greater than that of the first extruded portion.

[0009] The cable sealing sleeve provided by the utility model may also have such a technical feature, wherein the inclination angle of the side wall of the cable sealing hole is 3° to 8°.

[0010] The cable sealing sleeve provided by the utility model may also have such a technical feature, wherein the mounting hole has a through hole portion and a stepped hole portion connected to the through hole portion, the sealing sleeve body is sealingly embedded in the through hole portion, and the sealing sleeve limiting portion matches the stepped hole portion and is arranged in the stepped hole portion.

[0011] The cable sealing sleeve provided by the utility model may also have such a technical feature, wherein the thickness of the sealing sleeve limiting portion is greater than or equal to the depth of the stepped hole portion.

[0012] The utility model provides a cable connector unit, which is arranged on a base with a mounting hole of an electrical device and is used for sealingly connecting a cable to the base. It is characterized in that it comprises: the above-mentioned cable sealing sleeve, which is sealingly embedded in the mounting hole and is used for allowing the cable to pass through and sealing the cable; and a fixing component, which is used to fix the cable sealing sleeve on the base.

[0013] The cable connector unit provided by the utility model may also have such technical features, wherein the fixing component includes: a pressure plate having a through limiting hole and a plurality of fixing holes; and a plurality of fasteners, respectively arranged in each of the fixing holes, for fixing the pressure plate to the base, and one end of the cable sealing sleeve is inserted into the limiting hole.

[0014] The utility model provides an electrical device connected with a cable, characterized in that it comprises: a base having a mounting hole; and the above-mentioned cable connector unit, which is arranged at the mounting hole of the base, and the cable is sealed and connected to the base through the cable connector unit.

[0015] Function and effect of utility model

[0016] According to the cable sealing sleeve, cable joint unit and electrical device of the utility model, the cable sealing sleeve includes a sealing sleeve body and a sealing sleeve limiting portion, wherein the sealing sleeve body has a conical cable sealing hole, and the diameter of the cable outlet of the cable sealing hole is smaller than the diameter of the cable, so that the sealing between the cable and the cable sealing sleeve can be achieved through interference fit, and because the cable sealing sleeve is sealedly embedded in the mounting hole of the machine base, the sealing between the cable and the machine base can be effectively achieved, and because the cable sealing hole is a conical hole, the contact area with the cable is large, so it can avoid excessive pressure on some parts of the cable and damage to the surface of the cable, thereby ensuring a long-term sealing effect. Furthermore, because the sealing sleeve limiting portion is fixedly connected to the machine base, the cable sealing sleeve can be fixed and limited, and the cable sealing sleeve will not rotate or shift due to the pulling of the cable, thereby ensuring a long-term sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the cable sealing sleeve in the first embodiment of the utility model;

[0018] Figure 2 It is a stereoscopic view of the cable sealing sleeve in the first embodiment of the utility model at different angles;

[0019] Figure 3 is a cross-sectional view of the cable sealing sleeve in the first embodiment of the utility model;

[0020] Figure 4 is a three-dimensional diagram of a cable connector unit in Embodiment 1 of the present utility model;

[0021] Figure 5 It is a three-dimensional diagram of the pressure plate in the first embodiment of the utility model;

[0022] Figure 6 It is a cross-sectional view of the pressure plate in the first embodiment of the utility model;

[0023] Figure 7 It is a three-dimensional diagram of the cable connector unit in the first embodiment of the present utility model in the use state;

[0024] Figure 8 yes Figure 7 Structural breakdown diagram of the medium structure;

[0025] Fig. 9 yes Figure 7 A cross-sectional view of the structure;

[0026] Fig.10 It is a three-dimensional diagram of the cable connector unit in the second embodiment of the present utility model in the use state;

[0027] Fig.11 yes Fig.10 Cross-sectional view of the structure.

[0028] Reference numerals:

[0029] Electrical device 100; cable connector unit 10; cable sealing sleeve 11; sealing sleeve body 111; first extrusion portion 1111; second extrusion portion 1112; cable sealing hole 1113; cable outlet 1113b; cable inlet 1113a; sealing sleeve limiting portion 112; sealing sleeve fixing hole 1121; pressure plate 12; pressure plate fixing portion 121; pressure plate fixing hole 1211; pressure plate positioning portion 122; press-fit hole 123; press-fit installation inlet 123a; press-fit outlet 123b; machine base 20; mounting hole 21; stepped hole portion 211; through hole portion 212; threaded hole 213; cable 30; wire core 31; sheath 32. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the cable sealing sleeve, cable connector unit and electrical device of the present invention are specifically described below in combination with embodiments and drawings.

[0031] <Example 1>

[0032] The present embodiment provides a cable sealing sleeve, which cooperates with a pressure plate to achieve cable sealing, and is suitable for a motor whose base has a mounting hole, wherein the mounting hole has a stepped hole portion and a circular through hole connected to the stepped hole portion.

[0033] Figure 1 is a three-dimensional diagram of the cable sealing sleeve in this embodiment, Figure 2 : are three-dimensional diagrams of the cable sealing sleeve at different angles in this embodiment. Figure 3 is a cross-sectional view of the cable sealing sleeve in this embodiment.

[0034] like Figures 1 to 3 As shown, the cable sealing sleeve 11 includes a sealing sleeve main body 111 and a sealing sleeve limiting portion 112 which are integrally formed.

[0035] The sealing sleeve body 111 is substantially columnar and has an axisymmetric structure. The sealing sleeve body 111 includes a first extrusion portion 1111 and a second extrusion portion 1112 , both of which are used to extrude the cable, thereby achieving sealing between the cable and the cable sealing sleeve 11 .

[0036] The first extrusion portion 1111 is generally cylindrical, and the edge of its outer end is rounded. The outer diameter of the first extrusion portion 1111 is slightly larger than the aperture of the through hole portion 212 of the mounting hole 21. The first extrusion portion 1111 is embedded in the through hole portion 212, and the two are interference fit, so as to achieve sealing between the cable sealing sleeve 11 and the machine base.

[0037] The second extrusion portion 1112 is roughly in the shape of a truncated cone, and the edge of its outer end is also rounded. The second extrusion portion 1112 is coaxially arranged with the first extrusion portion 1111, and the end with a larger outer diameter is connected to the axial end of the first extrusion portion 1111. The outer diameter of the end with a larger outer diameter of the second extrusion portion 1112 is substantially the same as the outer diameter of the first extrusion portion 1111. The axial length of the second extrusion portion 1112 is greater than the axial length of the first extrusion portion 1111.

[0038] The sealing sleeve body 111 also has a cable sealing hole 1113 that penetrates along its axial direction. One end of the cable sealing hole 1113 is located at the outer end surface of the first extrusion part 1111, and the end is the cable outlet 1113b; the other end is located at the outer end surface of the second extrusion part 1112, and the end is the cable inlet 1113a. The cable sealing hole 1113 is a tapered hole, and the aperture at the cable inlet 1113a is the largest, which is basically consistent with the outer diameter of the cable; the aperture at the cable outlet 1113b is the smallest, which is slightly smaller than the outer diameter of the cable; between the cable inlet 1113a and the cable outlet 1113b, the aperture of the cable sealing hole 1113 changes uniformly. The inclination angle of the side wall of the cable sealing hole 1113 (i.e., the angle between the extension line of the side wall 1113A and the central axis 111A in the cross section passing through the central axis 111A of the sealing body 111) is 3° to 8°, preferably 4° to 5°.

[0039] The hole diameter at the cable entrance 1113a is substantially the same as the outer diameter of the cable, and the diameter of the outer end portion of the second extrusion portion 1112 is relatively smaller, that is, the thickness of the cable sealing sleeve 11 at the cable entrance 1113a is thinner, so it is relatively easy to pass one end of the cable through the cable entrance 1113a. The hole diameter of the cable exit 1113b is slightly smaller than the outer diameter of the cable, so it is possible to achieve sealing through interference fit. Between the cable entrance 1113a and the cable exit 1113b, since the hole diameter of the cable sealing hole 1113 changes evenly, and the rubber cable sealing sleeve 11 and the cable sheath (usually made of rubber or other materials) have a certain elasticity, it is also possible to smoothly pass the one end of the cable through the cable sealing hole 1113.

[0040] The sealing sleeve limiting portion 112 is formed on the outer periphery of the axial middle part of the sealing sleeve body 111 and is located at the connection position between the first extrusion portion 1111 and the second extrusion portion 1112. The sealing sleeve limiting portion 112 is plate-shaped. Along the axial direction of the sealing sleeve body 111, the cross-sectional shape of the sealing sleeve limiting portion 112 matches the stepped hole portion of the machine base mounting hole. Its cross-sectional shape is a rounded square, and its size is slightly smaller than the cross-sectional size of the stepped hole portion. The thickness of the sealing sleeve limiting portion 112 is slightly greater than the groove depth of the stepped hole portion. The four corners of the sealing sleeve limiting portion 112 are respectively provided with four through-going sealing sleeve fixing holes 1121.

[0041] The cable gland 11 is made of rubber and has a certain elasticity. Preferably, the hardness of the cable gland 11 is close to that of the cable. Taking the Shore hardness as the standard, "close" here specifically means that the difference between the Shore hardness of the cable gland 11 and the Shore hardness of the cable 30 is less than or equal to 5HA. In this embodiment, the overall Shore hardness of the cable is about 70HA, and the material of the cable gland 11 is nitrile rubber, and its Shore hardness is also about 70HA.

[0042] Figure 4 is a three-dimensional diagram of the cable connector unit in this embodiment.

[0043] like Figure 4 As shown, this embodiment also provides a cable joint unit 10 using the cable gland 11, which also includes a pressing plate 12 and a plurality of screws (not shown in the figure) used in conjunction with the cable gland 11 to compress and fix the cable gland 11.

[0044] Figure 5 : is a three-dimensional diagram of the pressing plate in this embodiment, Figure 6 2 is a cross-sectional view of the pressure plate in this embodiment.

[0045] like Figure 5 and Figure 6 As shown, the pressing plate 12 includes a pressing plate fixing portion 121 and a pressing plate positioning portion 122 .

[0046] The pressure plate fixing part 121 is roughly in the shape of a flat plate, and the outer contour of its cross section is square, and the size of its cross section is slightly larger than the cross section size of the base mounting hole. The middle part of the pressure plate fixing part 121 has a through hole, and the four corners have four through pressure plate fixing holes 1211, and the distribution of the four pressure plate fixing holes 1211 corresponds to the four sealing sleeve fixing holes 1121. The edge of the base mounting hole also has four threaded holes. After the assembly is completed, the corresponding sealing sleeve fixing holes 1121, the pressure plate fixing holes 1211 and the threaded holes are roughly aligned, and screws can be set to fix the pressure plate 12 and the cable sealing sleeve 11 on the base, and the pressure plate fixing part 121 presses the sealing sleeve limiting part 112 of the cable sealing sleeve 11 on the base.

[0047] The pressure plate positioning portion 122 extends outward from the edge of the circular through hole in the middle of the pressure plate fixing portion 121. The pressure plate positioning portion 122 is roughly in the shape of a cone ring, and the end connected to the pressure plate fixing portion 121 has a larger diameter. The through hole inside the pressure plate positioning portion 122 is connected to the through hole in the middle of the pressure plate fixing portion 121 to form a press-fit hole 123. The press-fit hole 123 is also a tapered hole, one end of which is located at the end face of the pressure plate fixing portion 121 away from the pressure plate positioning portion 122, and this end is the press-fit inlet 123a, and the other end is located at the outer end of the pressure plate positioning portion 122, and this end is the press-fit outlet 123b. The aperture at the press-fit inlet 123a is the largest, and the aperture at the press-fit outlet 123b is the smallest. Between the press-fit inlet 123a and the press-fit outlet 123b, the aperture of the press-fit hole 123 changes evenly. The inclination angle of the side wall of the press-fit hole 123 is substantially the same as the inclination angle of the side wall of the cable sealing hole 1113 .

[0048] The hole diameter at the press-fitting inlet 123a is slightly smaller than the maximum outer diameter of the second extrusion portion 1112, so as to compress the second extrusion portion 1112 after assembly, thereby further compressing the cable 30. In addition, the outer surface of the connection position between the pressure plate positioning portion 122 and the pressure plate fixing portion 121 is rounded, that is, the edge of the press-fitting inlet 123a is rounded, so that the second extrusion portion 1112 of the cable sealing sleeve 11 is easier to be installed into the press-fitting hole 123.

[0049] The aperture at the press-fit inlet 123a and the inclination angle of the side wall of the press-fit hole 123 can be set according to the required compression effect, that is, by setting different apertures and inclination angles, different degrees of compression effect can be achieved on the cable sealing sleeve 11 and the cable 30 in the cable sealing hole 1113.

[0050] The material of the pressing plate 12 is metal, and its hardness is greater than that of the cable sealing sleeve 11, so that the cable sealing sleeve 11 can be pressed and positioned. In this embodiment, the material of the pressing plate 12 is stainless steel.

[0051] The cable connector unit 10 can be assembled in the following manner: First, the mounting hole of the base can be cleaned to remove dust and debris on its surface. Then, the cable gland 11 is embedded in the mounting hole, that is, the first extrusion portion 1111 of the cable gland 11 is embedded in the through hole portion of the mounting hole, and the gland limit portion 112 is embedded in the stepped hole portion. At the same time, the pressing plate 12 can be sleeved on the cable gland 11 without pressing it first. Next, one end of the cable is inserted from the cable inlet 1113a of the cable gland 11, and it is continuously inserted until the end of the cable 30 passes through the cable outlet 1113b and reaches the inside of the base. Finally, the pressing plate 12 sleeved on the cable gland 11 is pressed toward the mounting hole of the base, and then a plurality of screws are installed to fix the pressing plate 12, the cable gland 11 and the base together to complete the assembly.

[0052] Figure 7 is a structural schematic diagram of the cable connector unit in the present embodiment in use state, Figure 8 yes Figure 7 Structural breakdown diagram of the structure in Fig. 9 yes Figure 7 Cross-sectional view of the structure.

[0053] like Figures 7 to 9 As shown, the base 20 has a mounting hole 21, which has a stepped hole portion 211 (a groove with a rounded square cross section) and a through hole portion 212 connected to the stepped hole portion 211. The opening of the stepped hole portion 211 is located on the outer surface of the base 20.

[0054] After assembly, the cable gland 11 is embedded in the mounting hole 21, the first extrusion portion 1111 thereof is sealedly embedded in the through hole portion 212, the gland stopper portion 112 is embedded in the stepped hole portion 211, the pressing plate 12 is sleeved on the second extrusion portion 1112 of the cable gland 11 and pressed toward the mounting hole 21, and the pressing plate 12, the cable gland 11 and the base 20 are fixedly connected by four screws. The cable connector unit 10 is sealed with the base 20. The cable 30 is inserted into the cable sealing hole 1113 of the cable gland 11. The cable 30 has a plurality of wire cores 31 and a rubber sheath 32 wrapped around the outer side of the wire core 31. Due to the shape and size of the cable sealing hole 1113 and the pressing effect of the pressing plate 12, the outer surface of the sheath 32 is also sealed with the cable gland 11. At the same time, the materials of the sheath 32 of the cable 30 , the cable sealing sleeve 11 and the pressing plate 12 are all waterproof and airtight materials, so the cable 30 can be well sealed and connected to the base 20 .

[0055] Example 1 Function and Effect

[0056] According to the cable sealing sleeve, cable connector unit and electrical device provided in this embodiment, the cable sealing sleeve includes a sealing sleeve body and a sealing sleeve limiting portion, wherein the sealing sleeve body has a conical cable sealing hole, and the diameter of the cable outlet of the cable sealing hole is smaller than the diameter of the cable, so that the sealing between the cable and the cable sealing sleeve can be achieved through interference fit, and because the cable sealing sleeve is sealedly embedded in the mounting hole of the machine base, the sealing between the cable and the machine base can be effectively achieved, and because the cable sealing hole is a conical hole, the contact area with the cable is large, so that excessive pressure on a part of the cable can be avoided to cause damage to the surface of the cable, thereby ensuring a long-term sealing effect. Furthermore, because the sealing sleeve limiting portion is fixedly connected to the machine base, the cable sealing sleeve can be fixed and limited, and the cable sealing sleeve will not rotate or shift due to the pulling of the cable, thereby ensuring a long-term sealing effect.

[0057] In the embodiment, the diameter of the cable entrance of the cable sealing hole is substantially consistent with that of the cable, and the outer extrusion portion is tapered, that is, the thickness at the cable entrance is relatively thinner, so one end of the cable can be easily inserted from the cable entrance, and because the cable sealing hole is a tapered hole with a uniformly varying aperture, and the cable sealing sleeve and the cable sheath both have a certain elasticity, the end of the cable inserted can also smoothly pass through the cable sealing hole and pass out from the cable outlet without being obstructed too much in the cable sealing hole. After insertion, the cable segment in the cable sealing hole will be pressed by the sealing hole with an aperture smaller than its diameter, thereby achieving reliable sealing. In addition, because the sealing hole is a tapered hole with a uniformly varying aperture, even after long-term use, when the end of the seal is deformed to a certain extent due to external conditions and the size of the cable outlet is enlarged, the portion of the sealing hole except the two ends can still effectively seal the cable.

[0058] Furthermore, the inclination angle of the tapered hole is 3° to 8°, which is relatively small, and thus will not hinder the entry of the cable end.

[0059] Furthermore, the hardness of the cable sealing sleeve is very close to that of the cable, so the end of the cable can pass through the cable sealing hole relatively smoothly, and a good seal can be achieved between the cable sealing sleeve and the cable, and the cable sealing sleeve will not be stretched open and the sealing effect will not be affected due to the hardness of the cable being significantly greater than that of the cable sealing sleeve.

[0060] In the embodiment, the mounting hole on the base has a stepped hole portion facing outward, and the sealing sleeve limiting portion of the cable sealing sleeve is embedded in the stepped hole portion and fixed by a plurality of screws, which can further ensure that the cable sealing sleeve will not rotate or shift even when the cable is pulled. In addition, referring to the installation steps described in the embodiment, the cable connector unit only needs to be installed outside the base to achieve cable sealing, and there is no need to disassemble the base and then install it from both sides of the base plate, which is very convenient to operate.

[0061] In the embodiment, the cable joint unit includes a cable sealing sleeve and a pressing plate, the outer extrusion portion of the cable sealing sleeve is conical, the pressing plate has a conical press-fit hole, and the maximum diameter of the press-fit hole is smaller than the maximum diameter of the outer extrusion portion, so the pressing plate can be conveniently sleeved on the outer extrusion portion of the cable sealing sleeve, and after the pressing plate is pressed toward the machine base, the pressing plate will press the middle part of the cable sealing sleeve, so that it will further contract and press the cable part in the cable sealing hole, thereby achieving a better sealing effect. In addition, by replacing the pressing plates with different apertures and different side wall inclination angles, different degrees of compression effects can be achieved on the cable, so that the cable joint unit can be applied to more scenarios.

[0062] Furthermore, the pressure plate also has a flat pressure plate fixing portion with multiple fixing holes, so that the sealing sleeve limiting portion of the cable sealing sleeve can be pressed tightly in the stepped hole portion, and the pressure plate, cable sealing sleeve and machine base can be conveniently fixed and connected to avoid the cable sealing sleeve from shifting in its axial direction, thereby further ensuring the sealing effect between the cable sealing sleeve and the machine base.

[0063] In the embodiment, the material of the cable sealing sleeve is nitrile rubber with good air tightness, waterproofness and wear resistance, and the material of the pressure plate is corrosion-resistant stainless steel. Therefore, the cable joint unit has a long service life and can maintain a stable sealing effect on the cable for a long time in a variety of environments, thereby reducing the frequency of inspection and maintenance of electrical equipment.

[0064] <Example 2>

[0065] This embodiment provides a cable connector unit for sealingly connecting a cable to a base. In this embodiment, the same symbols are given to the same components as those in the first embodiment and the corresponding descriptions are omitted.

[0066] Fig.10 is a three-dimensional diagram of the cable connector unit in use in this embodiment. Fig.11 yes Fig.10 Cross-sectional view of the structure.

[0067] like Fig.10 and Fig.11 As shown, in the cable connector unit 10' of this embodiment, the structure of the cable sealing sleeve 11 is substantially the same as that in the first embodiment, while the structure of the mounting hole 21' on the base 20 and the structure of the pressing plate 12' are different from those in the first embodiment.

[0068] In this embodiment, the mounting hole 21' on the base 20 also has a stepped hole portion 211' and a through hole portion 212'. The stepped hole portion 211' is also a groove with a rounded square cross section, but the opening of the stepped hole portion 211' faces the inner side of the base 20; the through hole portion 212' is a tapered hole, and the end of the through hole portion 212' with a larger aperture is connected to the stepped hole portion 211', and the end of the through hole portion 212' with a smaller aperture is located on the outer surface of the plate body of the base 20. The shape of the through hole portion 212' matches the second extrusion portion 1112 of the cable gland 11. Specifically, the maximum aperture of the through hole portion 212' is slightly smaller than the maximum outer diameter of the second extrusion portion 1112, and the inclination angle of the side wall of the through hole portion 212' is slightly larger than the inclination angle of the outer peripheral surface of the second extrusion portion 1112, so that the end of the second extrusion portion 1112 close to the first extrusion portion 1111 can be sealed and embedded in the through hole portion 212'.

[0069] Compared with the pressing plate 12 of the second embodiment, the pressing plate 12' of this embodiment does not have a pressing plate limiting portion 122', that is, the pressing plate 12' is a square plate body, and has a circular through hole in the middle that matches the first extrusion portion 1111, and the aperture of the circular through hole is slightly smaller than the outer diameter of the first extrusion portion 1111, and the four corners of the pressing plate 12' also have four pressing plate fixing holes 1211. In an alternative solution, the pressing plate 12' may further have an annular protrusion extending from the edge of the circular through hole in the middle thereof, and the hole inside the annular protrusion is a circular hole with a uniform diameter, and the annular protrusion may be sleeved on the first extrusion portion 1111 of the cable sealing sleeve 11 to better fix it.

[0070] In order to make the assembled structure more stable, in this embodiment, the axial length of the first extrusion portion 1111 of the cable sealing sleeve 11 can also be set to be longer.

[0071] The cable connector unit 10' of this embodiment can be assembled in the following manner: First, the mounting hole 21' can be cleaned to remove dust and debris on its surface. Then, the cable sealing sleeve 11 is embedded in the mounting hole, that is, the second extrusion portion 1112 is embedded in the through hole portion 212', and the sealing sleeve limiting portion 112 is embedded in the stepped hole portion 211'. Next, one end of the cable is inserted from the cable inlet 1113a of the cable sealing sleeve 11, and it is continuously inserted until the end of the cable 30 passes through the cable outlet 1113b and reaches the inside of the base. Finally, the pressure plate 12 is mounted on the first extrusion portion 1111, and the pressure plate 12 is pressed toward the mounting hole 21', and then a plurality of screws are installed to fix the pressure plate 12, the cable sealing sleeve 11 and the base 20 to complete the assembly and achieve the seal between the cable and the base.

[0072] That is, the assembly method is similar to that of the first embodiment, the main difference being that the installation needs to be performed from the inner side of the base 20 ′.

[0073] In this embodiment, other structures are the same as those in the first embodiment, and thus will not be described again.

[0074] Functions and Effects of Embodiment 2

[0075] According to the cable gland, cable connector unit and electrical device provided in this embodiment, since the structure of the cable gland is the same as that in the first embodiment, the same technical effect as that in the first embodiment can be achieved. In addition, the cable gland and the cable connector unit of this embodiment can be applied to electrical equipment such as motors having the above-mentioned mounting hole structure (the stepped hole portion is inward and the through hole portion is a tapered hole).

[0076] <Modification>

[0077] This variant provides a cable connector unit, which differs from the second embodiment in that, in this variant, the through hole portion 212' of the mounting hole 21' on the base 20 is a circular through hole with a uniform aperture; the stepped hole portion 211' is the same as that in the second embodiment. Based on the structure of the mounting hole 21', in the cable connector unit 10' of this variant, the second extrusion portion 1112 of the cable sealing sleeve 11 includes a cylindrical section and a frustum section, wherein the length of the cylindrical section is greater than or equal to the axial length of the through hole portion 212', and the outer diameter of the cylindrical section is slightly larger than the aperture of the through hole portion 212'; the structure of the frustum section is basically the same as that of the second extrusion portion 1112 in the second embodiment, and the end with the larger diameter of the frustum section is connected to one end of the cylindrical section.

[0078] The installation method of the cable connector unit 10' of this variation is basically the same as that of the second embodiment, wherein after the cable gland 11 is embedded in the installation hole 21', the cylindrical section of the second extrusion portion 1112 of the cable gland 11 can be sealingly embedded in the through hole portion 212'.

[0079] Therefore, the cable connector unit of this modified example can be applied to electrical equipment such as motors having the above-mentioned mounting hole structure (the stepped hole portion is oriented in the right direction and the through hole portion is a round hole).

[0080] In this variation, other structures are the same as those in the second embodiment, and thus will not be described again.

[0081] The above embodiments and variations are only used to illustrate the specific implementation methods of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments and variations. The above embodiments, variations and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A cable sealing sleeve, arranged on a base of an electrical device having a mounting hole, for sealingly connecting a cable to the base, characterized in that: include: A sealing sleeve body, sealingly embedded in the mounting hole; as well as The sealing sleeve limiting part is fixedly connected to the machine base and is used to limit the sealing sleeve body. Wherein, the sealing sleeve body has a conical and through cable sealing hole, The two ends of the cable sealing hole are respectively a cable entrance and a cable exit. The diameter of the cable outlet is smaller than the diameter of the cable inlet, and smaller than the diameter of the cable.

2. The cable sealing sleeve according to claim 1, characterized in that: in, The sealing sleeve body comprises: A first extrusion portion, which is cylindrical; and The second extrusion part is in the shape of a truncated cone. An end of the second extrusion portion having a larger outer diameter is connected to one end of the first extrusion portion. The cable outlet is located on the outer end of the first extrusion portion, The cable inlet is located on an outer end of the second extrusion portion.

3. The cable sealing sleeve according to claim 2, characterized in that: in, The diameter of the cable inlet is equal to the diameter of the cable.

4. The cable sealing sleeve according to claim 2, characterized in that: in, The outer diameter of the end of the second extrusion part with a larger outer diameter is consistent with the outer diameter of the first extrusion part. The second extrusion portion has an axial length greater than that of the first extrusion portion.

5. The cable sealing sleeve according to claim 1, characterized in that: in, The inclination angle of the side wall of the cable sealing hole is 3° to 8°.

6. The cable sealing sleeve according to claim 1, characterized in that: in, The mounting hole has a through hole portion and a stepped hole portion communicating with the through hole portion, The sealing sleeve body is sealingly embedded in the through hole portion, The sealing sleeve limiting portion matches the stepped hole portion and is arranged in the stepped hole portion.

7. The cable sealing sleeve according to claim 6, characterized in that: in, The thickness of the sealing sleeve limiting portion is greater than or equal to the depth of the stepped hole portion.

8. A cable connector unit, arranged on a base of an electrical device having a mounting hole, for sealingly connecting a cable to the base, characterized in that: include: A cable sealing sleeve, sealingly embedded in the mounting hole, for allowing the cable to pass through and sealing the cable; as well as A fixing assembly, used for fixing the cable sealing sleeve on the base, Wherein, the cable sealing sleeve is the cable sealing sleeve as described in any one of claims 1-7.

9. The cable connector unit according to claim 8, Features: Wherein, the fixing component comprises: A pressing plate having a through press-fit hole and a plurality of pressing plate fixing holes; and A plurality of fasteners are respectively arranged in each of the fixing holes of the pressing plate, and are used to fix the pressing plate to the base. One end of the cable sealing sleeve is inserted into the press-fit hole.

10. An electrical device connected to a cable, characterized in that: include: A machine base having a mounting hole; as well as A cable connector unit is arranged at the mounting hole of the base, and the cable is sealed and connected to the base through the cable connector unit. Wherein, the cable joint unit is the cable joint unit described in claim 8 or 9.

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