Cable pulling head structure

Abstract

The application discloses a cable traction head structure, comprising a protective shell, a fastening assembly, a traction piece, a sealing piece and a locking piece, a cable cavity for inserting a cable is formed in the inside of the protective shell; the fastening assembly is installed at the front end of the cable cavity, the core of the cable can be inserted into the fastening assembly and locked; the traction piece is detachably connected to the front end of the fastening assembly; the sealing piece is embedded in the cable cavity, the sealing piece is abutted between the inner wall of the cable cavity and the fastening assembly to form a seal, and the locking piece is detachably installed at the front end of the protective shell and one end of the locking piece is pierced into the sealing piece to lock the sealing piece. The application further guarantees the sealing effect under the condition of guaranteeing the stable clamping of the cable.

Description

Technical Field

[0001] This application relates to the technical field of cable equipment, and more particularly to a cable pulling head structure. Background Technology

[0002] With the development of urban construction, the use of cables is increasing. During cable laying, a traction head is generally required at the cable end to provide forward traction force, especially for large-mass, large-section cables, which are typically laid manually on the ground. Due to the significant weight of the cables, a traction device is needed for their laying. During the laying process, for safety and reliability considerations, high requirements are placed on the clamping stability and waterproofing of the traction head. However, existing cable traction head structures often only guarantee one of these aspects, failing to ensure waterproofing while maintaining clamping stability, thus failing to achieve both clamping and waterproofing simultaneously. Summary of the Invention

[0003] The purpose of this application is to provide a cable pulling head structure that can solve the above-mentioned problems in the prior art, and further ensure good sealing effect while ensuring stable clamping of the cable.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] On the one hand, a cable pulling head structure is provided, including:

[0006] The protective shell has a cable cavity inside for cable insertion;

[0007] A fastening assembly is installed at the front end of the cable cavity, and the cable core can be passed through the fastening assembly and locked in place;

[0008] A traction element is detachably connected to the front end of the fastening assembly;

[0009] A sealing element is fitted into the cable cavity, and the sealing element abuts against the inner wall of the cable cavity and the fastening assembly to form a seal.

[0010] Furthermore, it also includes a locking element, which is detachably installed at the front end of the protective shell, and one end of which pierces the front end face of the seal to lock the seal.

[0011] Furthermore, the locking member is rotatably connected to the protective shell via a threaded structure, and the locking member can reciprocate between the locked position and the unlocked position relative to the sealing member.

[0012] Furthermore, the locking member extends to one end relative to the sealing member and forms a puncture portion.

[0013] Furthermore, multiple locking components are provided and are arranged circumferentially at intervals with the axis of the protective shell as the center point.

[0014] Furthermore, the sealing element is a cold-molded elastic element.

[0015] Furthermore, the seal is a stretchable elastic element.

[0016] Furthermore, the fastening assembly includes a fastening part and a locking member. The fastening part has a core hole on one side opposite to the cable, through which the core of the cable can pass. The fastening part has a locking hole on its side that communicates with the core hole. The locking member is inserted into the locking hole and abuts against the core to lock it.

[0017] Furthermore, the fastening portion extends in the direction relative to the traction member to form a connecting portion, and the connecting portion is connected to the traction member.

[0018] Furthermore, the front end of the traction member is provided with a traction hole, and the rear end is connected to the connecting part by a pin.

[0019] Furthermore, a protective cover is provided at the connection between the traction component and the connecting part.

[0020] The beneficial effects of this application are as follows: A cable cavity is initially opened on the protective shell to limit the cable. The cable is inserted from the rear end of the cable cavity, and then the cable is further limited and locked by the fastening component to prevent loosening. A sealing element is installed between the inner wall of the cable cavity and the fastening component. The sealing element can play a role in sealing and waterproofing, preventing external water from contacting the wire core inside the fastening component through the gap between the cable and the inner wall of the cable cavity, which could cause leakage or other accidents. This ensures high sealing performance during cable pulling and improves its safety and reliability. At the same time, by inserting the locking element into the sealing element and forming abutment with the sealing element, the sealing element can be effectively fixed in the sealing position, preventing the sealing element from slipping off and ensuring sealing performance throughout the pulling process. In addition, the sealing element is designed as a retractable elastic structure, which can adapt to different cable sizes and better seal the cable. Attached Figure Description

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a perspective view of the cable pulling head structure described in the embodiments of this application;

[0023] Figure 2 This is an exploded view of the cable pulling head structure described in the embodiments of this application;

[0024] Figure 3 This is a top view of the cable pulling head structure described in the embodiment of this application;

[0025] Figure 4 Examples of this application Figure 3 Cross-sectional view at point AA;

[0026] Figure 5 This is a perspective view of the sealing element described in the embodiments of this application;

[0027] Figure 6 This is a perspective view of the locking component described in the embodiments of this application;

[0028] Figure 7 This is a perspective view of the protective shell described in the embodiments of this application;

[0029] Figure 8 This is a perspective view of the fastening part described in the embodiment of this application;

[0030] Figure 9 This is a left view of the fastening part described in the embodiment of this application;

[0031] Figure 10 This is a schematic diagram illustrating the usage state of the cable insertion in an embodiment of this application;

[0032] Figure 11 This is a three-dimensional schematic diagram of the cable described in the embodiments of this application.

[0033] In the diagram: 1. Protective shell; 101. Cable cavity; 102. Positioning groove; 2. Fastening assembly; 201. Fastening part; 202. Locking part; 2011. Core hole; 2012. Locking hole; 2013. Connecting part; 2014. Pin hole; 2015. Positioning post; 3. Traction part; 4. Sealing part; 401. First section; 402. Second section; 403. Elastic thread; 5. Locking part; 501. Puncture part; 6. Protective cover; 7. Pin; 8. Cable; 801. Core. Detailed Implementation

[0034] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Example 1: A cable pulling head structure.

[0038] like Figures 1-11 As shown, this embodiment provides a cable pulling head structure, including: a protective shell 1, a fastening assembly 2, a pulling member 3, a sealing member 4, and a locking member 5. The protective shell 1 has a cable cavity 101 inside for inserting a cable 8. The fastening assembly 2 is installed at the front end of the cable cavity 101, and the core 801 of the cable 8 can pass through the fastening assembly 2 and be locked. The pulling member 3 is detachably connected to the front end of the fastening assembly 2. The sealing member 4 is fitted into the cable cavity 101, and the sealing member 4 abuts against the inner wall of the cable cavity 101 to form a seal between it and the fastening assembly 2. The locking member 5 is detachably installed at the front end of the protective shell 1, and one end pierces the front end face of the sealing member 4 to lock the sealing member 4.

[0039] Based on the above scheme, the rear opening of the cable cavity 101 formed inside the protective shell 1 allows the cable 8 to be inserted. After the cable 8 is inserted into the cable cavity 101, the outer sheath of the wire core 801 at the front end of the cable 8 is stripped and inserted into the fastening component 2 and locked. During this process, the fastening component 2 can hold the front end of the cable 8 except for the exposed wire core 801, so as to limit the installation position of the cable 8. After the wire core 801 is inserted into the fastening component 2, the fastening component 2 further presses and locks the wire core 801. A sealing element 4 is provided between the inner wall of the cable cavity 101 and the fastening component 2. The sealing element 4 can play a role in sealing and waterproofing, preventing external water from passing through the cable 8 and the wire core 801. The gap between the inner walls of the cable cavity 101 can contact the wire core 801 inside the fastening assembly 2, causing leakage and other accidents. This ensures high sealing performance during the traction of the cable 8, improving its safety and reliability. After the seal 4 is embedded, the frictional force generated during traction may cause the seal 4 to slip off. Therefore, it is necessary to further limit and fix the position of the seal 4. Specifically, the locking member 5 is inserted into and passes through the front end face of the seal 4 to lock the seal 4 and prevent the seal 4 from shifting in the axial direction. It should be noted that the locking member 5 is inserted into the seal 4 but not punctured, so it does not affect the sealing performance of the seal 4.

[0040] It is worth mentioning that the seal 4 is embedded in the cable cavity 101 of the protective shell 1. Therefore, the protective shell 1 plays the role of protecting the seal 4, preventing the seal 4 from being scratched during the dragging of the cable 8, and also protecting the cable 8.

[0041] Furthermore, the fastening assembly 2 includes a fastening part 201 and a locking member 202. The fastening part 201 has a core hole 2011 on one side opposite to the cable 8, through which the core 801 of the cable 8 can pass. The fastening part 201 has a locking hole 2012 on the side that communicates with the core hole 2011. The locking member 202 is inserted into the locking hole 2012 and abuts against the core 801 to lock it. After the outer sheath of the cable 8 is stripped, the exposed wire core 801 can be inserted into the wire core hole 2011. Once the wire core 801 is in place, the locking member 202 moves relative to the wire core 801, thereby abutting and locking it. To facilitate the smooth insertion of the wire core 801 into the wire core hole 2011, initially, the locking member 202 is in an unlocked state, with little friction between it and the wire core 801, or the locking member 202 is not in contact with the wire core 801 initially. When a force is applied to the locking member 202, it locks. The locking element 202 moves relative to the wire core 801, thereby tightly abutting against the wire core 801. The friction between the locking element 202 and the wire core 801 increases, stably locking the wire core 801 within the wire core hole 2011. Various forms of force can be applied to the locking element 202, as long as the applied force increases the friction between the locking element 202 and the wire core 801 enough to lock the wire core 801. Specifically, the locking element 202 and the fastening part 201 are connected by threads, and the force between the locking element 202 and the wire core 801 can be adjusted by loosening or tightening. Because the fastening part 201 has a locking hole 2012 on its side, the fastening assembly 2 is prone to water ingress. Therefore, a sealing element 4 needs to be installed between the fastening assembly 2 and the cable cavity 101. The sealing element 4 essentially covers the outer surface of the fastening part 201 to achieve a seal.

[0042] Meanwhile, multiple locking holes 2012 are provided on the surface of the fastening part 201. The multiple locking holes 2012 are circumferentially spaced. Each locking hole 2012 is provided with a locking element 202 and is connected to the corresponding wire core hole 2011. The number of locking holes 2012 and wire core holes 2011 corresponds to the number of wire cores 801 in the cable 8. That is, when the number of wire cores 801 in the cable 8 is one, one wire core hole 2011 and one locking hole 2012 are provided. When the number of wire cores 801 in the cable 8 is three, three wire core holes 2011 are provided. At least three locking holes 2012 are provided to connect to the three wire core holes 2011 respectively. Alternatively, two locking holes 2012 can be provided for each wire core hole 2011. This will make locking the wire core 801 more stable and secure.

[0043] Furthermore, since the seal 4 is fitted between the fastening part 201 and the inner wall of the cable cavity 101, its axial position is relatively stable and will not shift when the friction between the three is large enough. However, during the dragging of the cable 8, the seal 4 is prone to detachment. Therefore, the position of the seal 4 needs to be further fixed. Specifically, the locking member 5 extends from one end of the seal 4 to form a piercing part 501. The piercing part 501 is sharp. When the piercing part 501 pierces and exits from the front end face of the seal 4, the locking member 5 and the seal 4 rub against each other, so that the friction between the locking member 5 and the seal 4 can effectively lock the seal 4, thereby preventing the seal 4 from shifting axially. The locking member 5 is rotatably connected to the protective shell 1 through a threaded structure, and the locking member 5 can reciprocate between the locked position and the unlocked position relative to the seal 4.

[0044] In addition, to further improve the locking stability of the seal 4, multiple locking elements 5 are provided and are arranged circumferentially with the axis of the protective shell 1 as the center point. The multiple locking elements 5 cooperate with the seal 4 to lock, and the seal 4 is subjected to a balanced and stable force.

[0045] Preferably, the sealing element 4 is a cold-molded elastic element. After being inserted by the locking element 5, the cold-molded elastic element can hold the locking element 5 in place. The friction between the elastic element and the locking element 5 is large enough to prevent them from separating, thereby effectively limiting the axial position of the sealing element 4.

[0046] Based on the sealing element 4 being a cold-molded elastic element, the elastic element further has a telescopic function. An elastic thread 403 is provided in the middle of the elastic element. With the elastic thread 403 as the midpoint, one side of the elastic element 403 is a first part 401 that abuts against the fastening part 201, and the other side is a second part 402. The second part 402 abuts against the cable 8, and the second part 402 can telescopic relative to the first part 401.

[0047] In some embodiments, the fastening part 201 extends relative to the traction member 3 to form a connecting part 2013. The connecting part 2013 is connected to the traction member 3. The front end of the traction member 3 has a traction hole, and the rear end is connected to the connecting part 2013 via a pin 7. Pin holes 2014 are correspondingly provided at the connection points of the connecting part 2013 and the traction member 3. The connection between the connecting part 2013 and the traction member 3 is completed by inserting the pin 7 into the two pin holes 2014 respectively, making the assembly and disassembly of the traction head structure simpler and more convenient. The traction hole at the front end of the traction member 3 can be used to thread a traction rope, etc.

[0048] Furthermore, a protective cover 6 is provided at the connection between the traction member 3 and the connecting part 2013. The protective cover 6 serves a protective function, preventing the traction member 3 and the connecting part 2013 from accidentally disengaging.

[0049] It is worth mentioning that the protective shell 1 is provided with a positioning groove 102, and the fastening part 201 is provided with a positioning post 2015. Through the cooperation of the positioning post 2015 and the positioning groove 102, the fastening component 2 can be accurately installed at the front end of the cable cavity 101, thereby improving the assembly accuracy.

[0050] In this scheme, the assembly process between the cable pulling head structure and the cable 8 is as follows: Align the core hole 2011 of the fastening part 201 with the core 801 of the cable 8 and put it on, so that the core hole 2011 of the fastening part 201 is completely fitted on the core 801. The locking part 202 moves relative to the core 801 in the locking hole 2012 to lock the core 801. Then, the sealing part 4 is installed on the fastening assembly 2 to complete the sealing action. Then, the protective shell 1 is installed on the sealing part 4. The protective sleeve 6 is installed on the front end of the protective shell 1. The pulling part 3 is fitted on the connecting part 2013, and the two pin holes 2014 are aligned. Finally, the pin 7 is inserted into the two pin holes 2014 to complete the assembly.

[0051] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0052] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0054] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A cable pulling head structure, characterized in that, include: The protective shell (1) has a cable cavity (101) inside which a cable (8) can be inserted. Fastening assembly (2) is installed at the front end of the cable cavity (101). The core (801) of the cable (8) can pass through the fastening assembly (2) and be locked. The fastening assembly (2) includes a fastening part (201) and a locking member (202). The fastening part (201) has a core hole (2011) on one side opposite to the cable (8) for the core (801) of the cable (8) to pass through. The fastening part (201) has a locking hole (2012) on the side that communicates with the core hole (2011). The locking member (202) is inserted into the locking hole (2012) and abuts against the core (801) to lock it. The traction component (3) is detachably connected to the front end of the fastening assembly (2); A sealing element (4) is fitted into the cable cavity (101). The sealing element (4) abuts against the inner wall of the cable cavity (101) and forms a seal between it and the fastening assembly (2). The sealing element (4) is a cold-molded elastic element. An elastic thread is provided in the middle of the sealing element (4). With the elastic thread as the midpoint, one side of the sealing element (3) abuts against the fastening part (201), and the other side abuts against the cable. The second part can extend and retract relative to the first part. The locking member (5) is detachably installed at the front end of the protective shell (1), and one end of it pierces the front end face of the seal (4) to lock the seal (4). The locking member (5) extends to one end of the seal (4) to form a piercing part (501). The piercing part (501) is sharp. When the piercing part (501) pierces into and out of the front end face of the seal (4), the locking member (5) rubs against the seal (4). The locking member (5) is rotatably connected to the protective shell (1) through a threaded structure. The locking member (5) can reciprocate between the locked position and the unlocked position relative to the seal (4).

2. The cable pulling head structure according to claim 1, characterized in that, Multiple locking components (5) are provided and are arranged circumferentially with the axis of the protective shell (1) as the center point.

3. The cable pulling head structure according to claim 1, characterized in that, The fastening part (201) extends in the direction relative to the traction member (3) and forms a connecting part (2013), which is connected to the traction member (3).

4. The cable pulling head structure according to claim 3, characterized in that, The front end of the traction member (3) is provided with a traction hole, and the rear end is connected to the connecting part (2013) by a pin (7).

5. The cable pulling head structure according to claim 4, characterized in that, A protective cover (6) is provided at the connection between the traction component (3) and the connecting part (2013).

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