Cable fixing head

Abstract

The utility model discloses a cable fixing head, which relates to the technical field of electrical connection equipment and comprises a fixing head main body, two ends of the fixing head main body are respectively in threaded connection with a packing nut and a locking nut, one end of a waterproof ring is sleeved in an inner cavity of the packing nut, and the other end of the waterproof ring is sleeved in an inner cavity of the fixing head main body. The periphery of the waterproof ring is provided with a gasket part used for abutting against the end face of the fixing head body and a matching part used for being matched with the packing nut in a clamped mode. The waterproof ring and the packing nut are connected in a clamped mode through the matching part, so that when the packing nut is screwed, the relative positions of the waterproof ring and the packing nut are not changed, and the follow-up rotation preventing effect is achieved. Meanwhile, the gasket part on the periphery of the waterproof ring abuts against the end face of the fixing head body, through the integrated design of the gasket and the waterproof ring, the structure and the installation procedure of the cable fixing head are simplified, the problem of product failure caused by installation dislocation is greatly reduced, and the sealing performance and the production efficiency of the cable fixing head are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical connection equipment technical field more specifically, relate to a cable fixing head. BACKGROUND

[0002] Cable fixing head is widely used in power distribution, electronics and electrical equipment field, is used for preventing water and other external pollution in the equipment, guarantees the safe normal operation of equipment.

[0003] The existing cable fixing head mainly includes the fixed head main part, one end of fixed head main part is connected with the galling screw cap screw, and the waterproof ring is pressed in the galling screw cap inside, the other end of fixed head main part is connected with the hexagon nut screw, and the sealing pad is pressed on the end face of fixed head main part, to realize waterproof effect.

[0004] But along with the increase of cable fixing head use time, the product will produce the risk of vibration loose when being subjected to the vibration, lead to the sealing performance of galling screw cap and waterproof ring is affected, further influence the waterproof performance of cable fixing head.

[0005] Summarized above, how to guarantee the waterproof performance of cable fixing head after long time use, is the problem that the present technical personnel in the field urgently solves. UTILITY MODEL CONTENT

[0006] Therefore, the utility model discloses the purpose is to provide a kind of cable fixing head, waterproof ring and galling screw cap are connected by cooperation portion clamping, realize the effect of anti-following, the gasket portion of the outer peripheral portion of waterproof ring and the end surface of fixed head main part abut, realize the integrated design of gasket and waterproof ring, sealing and production efficiency are high.

[0007] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A kind of cable fixing head, including fixed head main part, the both ends of fixed head main part are connected with galling screw cap and locking nut screw respectively, one end of waterproof ring is set in the inner cavity of galling screw cap, the other end of waterproof ring is set in the inner cavity of fixed head main part, the outer peripheral portion of waterproof ring is equipped with gasket portion for abutting with the end surface of fixed head main part and cooperation portion for clamping with galling screw cap.

[0009] Preferably, the cooperation portion is located at the top end of the waterproof ring opposite to the fixed head main part, one of the top end of the waterproof ring and the inner cavity top surface of the galling screw cap is provided with a limiting protrusion, and the other is provided with a limiting groove matched with the limiting protrusion.

[0010] Preferably, the top end of the waterproof ring is provided with at least one annular protrusion, and the axis of the annular protrusion is collinear with the axis of the waterproof ring.

[0011] Preferably, the top end of the waterproof ring is provided with an annular groove for matching the outer peripheral part of the waterproof ring to form the annular protrusion.

[0012] Preferably, the top end of the waterproof ring is provided with a plurality of arc protrusions which are uniformly arranged along the circumferential direction of the waterproof ring.

[0013] Preferably, the gasket part comprises an annular gasket part which is arranged around the outer peripheral part of the waterproof ring, and the axis of the annular gasket part is collinear with the axis of the waterproof ring.

[0014] Preferably, the annular gasket part comprises a semi-annular gasket part, and the chord side of the semi-annular gasket part is attached to the outer peripheral part of the waterproof ring.

[0015] Preferably, the waterproof ring is provided with a conical matching surface which is relatively close to the bottom end of the fixing head body, and the taper angle of the conical matching surface is the same as the taper angle of the inner conical surface of the fixing head body.

[0016] Preferably, a sealing gasket is arranged between the fixing head body and the locking nut, and the fixing head body is provided with a sealing groove for accommodating the sealing gasket at an end which is relatively close to the locking nut, and the sealing groove is used for forming an interference fit with the sealing gasket to prevent the sealing gasket from being extruded out.

[0017] Preferably, the sealing groove comprises a trapezoidal sealing groove, and the included angle between the end of the trapezoidal sealing groove which is relatively close to the axis of the fixing head body and the axis of the fixing head body is greater than the included angle between the end of the trapezoidal sealing groove which is relatively far away from the axis of the fixing head body and the axis of the fixing head body.

[0018] The cable fixing head provided by the utility model, the waterproof ring and the jam nut are connected through the clamping connection of the matching parts, so that the relative position of the waterproof ring and the jam nut does not change when the jam nut is screwed, and the anti-rotation effect is realized.

[0019] Meanwhile, the gasket part of the outer peripheral part of the waterproof ring abuts against the end surface of the fixing head body, which can play the role of a traditional gasket, and through the integrated design of the gasket and the waterproof ring, the structure and the installation process of the cable fixing head are simplified, the product failure problem caused by installation misalignment is greatly reduced, and the sealing performance and the production efficiency of the cable fixing head are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings in the following description are only part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the premise of the provided drawings.

[0021] Figure 1 The side view schematic diagram of the specific embodiment of the cable fixing head provided by the present application is shown in the figure.

[0022] Figure 2 The half-section schematic diagram of the cable fixing head in the front view direction is shown in the figure.

[0023] Figure 3 The explosion schematic diagram of the cable fixing head is shown in the figure.

[0024] Figure 4 The half-section schematic diagram of the force tight nut is shown in the figure.

[0025] Figure 5 The half-section schematic diagram of the waterproof ring is shown in the figure.

[0026] Figure 6 The half-section schematic diagram of the fixing head body is shown in the figure.

[0027] Figures 1-6 In the figure:

[0028] 1-force tight nut; 11-limiting groove; 2-waterproof ring; 21-limiting protrusion; 22-ring gasket part; 3-fixing head body; 31-sealing groove; 4-sealing gasket; 5-locking nut. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application, obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0030] The core of the present application is to provide a cable fixing head, the waterproof ring and the force tight nut are connected through the cooperation part clamping connection, the anti-following effect is realized; the gasket part of the outer peripheral part of the waterproof ring abuts against the end face of the fixing head body, the integrated design of the gasket and the waterproof ring is realized, the sealing property and the production efficiency are high.

[0031] The utility model provides a cable fixing head, including fixed head main part 3, the both ends of fixed head main part 3 are connected with the thread of forcing cap 1 and locking nut 5 respectively, one end of waterproof ring 2 is covered in the inner chamber of forcing cap 1, the other end of waterproof ring 2 is covered in the inner chamber of fixed head main part 3, and the outer circumferential part of waterproof ring 2 is equipped with the gasket part for abutting with the end face of fixed head main part 3 and the matching part for the joint cooperation with forcing cap 1.

[0032] The matching part of waterproof ring 2 and the joint cooperation of forcing cap 1 can make the both form the fitting structure, avoid the rotation of waterproof ring 2 relative to forcing cap 1, and further realize the anti-following rotation effect of waterproof ring 2.

[0033] The both ends of waterproof ring 2 are covered in the inner chamber of forcing cap 1 and the inner chamber of fixed head main part 3 respectively, and the outer circumferential part of waterproof ring 2 is equipped with the gasket part for abutting with the end face of fixed head main part 3, the gasket part can play the role of the existing gasket, and simultaneously, since the gasket part is connected to the outer circumferential part of waterproof ring 2, the number of components of the cable fixing head is reduced, and the installation process of the cable fixing head is simplified.

[0034] In the embodiment, waterproof ring 2 and forcing cap 1 are connected through the joint cooperation of the matching part, so that the relative position of waterproof ring 2 and forcing cap 1 does not change when forcing cap 1 is screwed, and the anti-following rotation effect of waterproof ring 2 is realized.

[0035] Meanwhile, the gasket part of the outer circumferential part of waterproof ring 2 abuts with the end face of fixed head main part 3, which can play the role of the traditional gasket, and through the integrated design of the gasket and waterproof ring 2, the structure and installation process of the cable fixing head are simplified, the product failure problem caused by installation misalignment is greatly reduced, and the sealing performance and production efficiency of the cable fixing head are improved.

[0036] On the basis of the above embodiment, in order to reduce the overall height of the cable fixing head, the matching part can be arranged at the top end of waterproof ring 2 away from fixed head main part 3, one of the top end of waterproof ring 2 and the inner chamber top surface of forcing cap 1 is provided with a limiting protrusion 21, and the other is provided with a limiting groove 11 matched with the limiting protrusion 21.

[0037] The top end of waterproof ring 2 can be provided with a limiting protrusion 21, as shown in Figure 4 The inner chamber top surface of forcing cap 1 is provided with a limiting groove 11 matched with the limiting protrusion 21, as shown in Figure 5

[0038] The top end of waterproof ring 2 can be provided with a limiting groove 11, and the inner chamber top surface of forcing cap 1 is provided with a limiting protrusion 21 matched with the limiting groove 11.

[0039] ​Considering that the setting of the limiting groove 11 may affect the waterproof effect of the waterproof ring 2 itself, the top of the waterproof ring 2 is usually provided with a limiting protrusion 21, and the inner cavity top surface of the tightening nut 1 is provided with a limiting groove 11 that cooperates with the limiting protrusion 21.

[0040] The specific shape, structure, and size of the limiting protrusion 21 and the limiting groove 11 are determined according to actual production needs, such as the outer diameter of the waterproof ring 2, so as to ensure that the snap-fit ​​structure formed by the limiting protrusion 21 and the limiting groove 11 can effectively prevent the waterproof ring 2 from rotating and ensure the strength and other properties of the waterproof ring 2 and the tightening nut 1.

[0041] In this embodiment, the snap-fit ​​structure is located between the top of the waterproof ring 2 and the inner top surface of the tightening nut 1. Compared with the mating part being located on the outer periphery of the top of the waterproof ring 2, this is beneficial to reducing the overall height of the product, which reduces the space occupied by the product and also reduces the production cost of the product.

[0042] Based on the above embodiments, the structure of the limiting protrusion 21 is further defined, and the top of the waterproof ring 2 is provided with at least one annular protrusion, the axis of the annular protrusion being collinear with the axis of the waterproof ring 2.

[0043] In this embodiment, on the one hand, the processing of the annular protrusion is more convenient than that of the arc protrusion, which helps to reduce the manufacturing cost of the waterproof ring 2; on the other hand, the annular protrusion can ensure the contact area of ​​the snap-fit ​​structure between the waterproof ring 2 and the clamping nut 1, thereby ensuring the anti-rotation effect of the waterproof ring 2.

[0044] Regarding the specific location of the annular protrusion, the outer circumferential surface of the annular protrusion can be located inside the outer circumferential surface of the waterproof ring 2, or the outer circumferential surface of the annular protrusion can be flush with the outer circumferential surface of the waterproof ring 2. However, it is less common to set the outer circumferential surface of the annular protrusion to protrude beyond the outer circumferential surface of the waterproof ring 2, so as not to increase the radial dimension of the waterproof ring 2, thereby increasing the production cost and assembly difficulty of the waterproof ring 2.

[0045] Preferably, the top of the waterproof ring 2 is provided with an annular groove. The annular groove is used to cooperate with the outer periphery of the waterproof ring 2 to form an annular protrusion. The manufacturing process is simple and the production cost is low. It can maximize the contact area between the annular protrusion and the corresponding limiting groove 11 when the outer dimensions of the waterproof ring 2 and the annular diameter of the annular protrusion are consistent, so as to ensure that the snap-fit ​​structure between the waterproof ring 2 and the clamping nut 1 is stable and reliable.

[0046] Of course, several arc-shaped protrusions can also be provided at the top of the waterproof ring 2. The arc-shaped protrusions are evenly distributed along the circumference of the waterproof ring 2 to ensure that the fitting effect and limiting effect of the tightening nut 1 on the waterproof ring 2 in all directions are roughly the same.

[0047] Based on the above embodiments, the structure of the gasket portion of the waterproof ring 2 is defined. The gasket portion includes an annular gasket portion 22 surrounding the outer periphery of the waterproof ring 2, and the axis of the annular gasket portion 22 is collinear with the axis of the waterproof ring 2.

[0048] Compared to gaskets with other geometric shapes such as arc-shaped gaskets and rectangular gaskets, the annular gasket 22 is not only regular in shape and easy to process, but also ensures the contact area between the gasket and the fixed head body 3, thereby ensuring the gasket's spaced sealing function.

[0049] The gasket part is usually integrally formed with the waterproof ring 2. Therefore, the material of the gasket part is the same as that of the waterproof ring 2. The specific material of the waterproof ring 2 can be determined according to actual production needs and with reference to the waterproof ring 2 of the existing cable fixing head, so as to reduce installation resistance.

[0050] Please refer to Figure 5 The annular gasket portion 22 includes a semi-annular gasket portion, the chordal side of which is fitted to the outer periphery of the waterproof ring 2.

[0051] Based on the above embodiments, the fit between the waterproof ring 2 and the fixing head body 3 is defined. The waterproof ring 2 has a tapered mating surface at the bottom end relatively close to the fixing head body 3. The cone angle of the tapered mating surface is the same as the cone angle of the inner tapered surface of the fixing head body 3, so as to increase the contact area between the end faces of the waterproof ring 2 and the fixing head body 3 through the tapered surface fit, thereby improving the sealing performance.

[0052] Based on the above embodiments, a sealing gasket 4 can be provided between the fixing head body 3 and the locking nut 5. The fixing head body 3 is provided with a sealing groove 31 for accommodating the sealing gasket 4 at the end relatively close to the locking nut 5. The sealing groove 31 is used to form an interference fit with the sealing gasket 4 to prevent the sealing gasket 4 from being squeezed out.

[0053] Preferably, the sealing groove 31 includes a trapezoidal sealing groove, and the angle between the end of the trapezoidal sealing groove closest to the axis of the fixing head body 3 and the axis of the fixing head body 3 is greater than the angle between the end of the trapezoidal sealing groove furthest from the axis of the fixing head body 3 and the axis of the fixing head body 3. Figure 6 As shown.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0055] The cable fixing head provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A cable fixing head, comprising a fixing head body (3), wherein both ends of the fixing head body (3) are threadedly connected to a tightening nut (1) and a locking nut (5), respectively, characterized in that, One end of the waterproof ring (2) is fitted into the inner cavity of the tightening nut (1), and the other end of the waterproof ring (2) is fitted into the inner cavity of the fixing head body (3). The outer periphery of the waterproof ring (2) is provided with a gasket part for abutting against the end face of the fixing head body (3) and a mating part for engaging with the tightening nut (1).

2. The cable fixing head according to claim 1, characterized in that, The mating part is located at the top of the waterproof ring (2) which is relatively far away from the fixing head body (3). One of the top of the waterproof ring (2) and the inner cavity top surface of the tightening nut (1) is provided with a limiting protrusion (21), and the other is provided with a limiting groove (11) that engages with the limiting protrusion (21).

3. The cable fixing head according to claim 2, characterized in that, The top of the waterproof ring (2) is provided with at least one annular protrusion, and the axis of the annular protrusion is collinear with the axis of the waterproof ring (2).

4. The cable fixing head according to claim 3, characterized in that, The top of the waterproof ring (2) is provided with an annular groove, which is used to cooperate with the outer periphery of the waterproof ring (2) to form the annular protrusion.

5. The cable fixing head according to claim 2, characterized in that, The top of the waterproof ring (2) is provided with several arc-shaped protrusions, which are evenly arranged along the circumference of the waterproof ring (2).

6. The cable fixing head according to claim 1, characterized in that, The gasket portion includes an annular gasket portion (22) surrounding the outer periphery of the waterproof ring (2), and the axis of the annular gasket portion (22) is collinear with the axis of the waterproof ring (2).

7. The cable fixing head according to claim 6, characterized in that, The annular gasket portion (22) includes a semi-annular gasket portion, the chordal side of which is attached to the outer periphery of the waterproof ring (2).

8. The cable fixing head according to any one of claims 1-7, characterized in that, The waterproof ring (2) has a tapered mating surface at the bottom end of the fixing head body (3) and the tapered angle of the tapered mating surface is the same as the tapered angle of the inner tapered surface of the fixing head body (3).

9. The cable fixing head according to any one of claims 1-7, characterized in that, A sealing gasket (4) is provided between the fixing head body (3) and the locking nut (5). The fixing head body (3) has a sealing groove (31) for accommodating the sealing gasket (4) at one end relatively close to the locking nut (5). The sealing groove (31) is used to form an interference fit with the sealing gasket (4) to prevent the sealing gasket (4) from being squeezed out.

10. The cable fixing head according to claim 9, characterized in that, The sealing groove (31) includes a trapezoidal sealing groove, and the angle between the end of the trapezoidal sealing groove that is closer to the axis of the fixing head body (3) and the axis of the fixing head body (3) is greater than the angle between the end of the trapezoidal sealing groove that is farther away from the axis of the fixing head body (3) and the axis of the fixing head body (3).

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