A wheel type wire clamp and an insulator cross arm comprising the same

Abstract

The utility model discloses a kind of wheeled line clamp and the insulating cross arm comprising it belong to power grid construction technical field, including first U-shaped frame, second U-shaped frame, pulley and press plate of combined setting, by being set in the bottom plate of second U-shaped frame and press plate two ends through groove, and there is protruding in groove inside, after the rotation of second U-shaped frame, the alignment of two grooves each other, to form the cavity for clamping cable between two grooves, by protruding and cable outer skin abut, and slightly deformation is caused to cable outer skin to realize the fastening of cable.The wheeled line clamp in the utility model, its structure is simple, convenient to use, can be compacted to cable after traction adjustment is completed, prevent cable and line clamp between loose to cause cable to separate from line clamp, again by being set corresponding insulating cross arm based on it, the efficiency of cable laying is improved, the security of overhead line setting is guaranteed, with good practical value.

Description

Technical Field

[0001] This utility model belongs to the field of power grid construction technology, specifically relating to a wheeled clamp and an insulating crossarm containing the clamp. Background Technology

[0002] Overhead power grids typically play a vital role in daily life and industrial production, and their construction efficiency and quality are often related to the national economy and people's livelihood.

[0003] In traditional overhead power line construction, the installation of components such as poles, crossarms and iron fittings, insulators, and conductor fixing hardware typically requires individual installation. These components are usually not supplied as complete sets, necessitating on-site assembly by workers before pole erection. This process is cumbersome and complex. Furthermore, the numerous and heavy crossarms and iron fittings require large cranes for on-site installation, making the process time-consuming, labor-intensive, and extremely costly. In remote areas where transportation is difficult and large hoisting equipment cannot reach, skilled workers must frequently climb poles for assembly, resulting in high-intensity work and significant safety hazards.

[0004] In the applicant's prior patent application CN202420737290.7, a wheel-type cable clamp for overhead lines and an insulating crossarm comprising it were proposed. The clamp, through the rotation and switching of a second U-shaped frame above and below the pulley, satisfies the cable traction requirements while ensuring reliable clamping and fixing of the cable after traction adjustment. This simplifies the traction and fixing process of overhead line cables, improves cable laying efficiency, reduces workload and high-altitude operation risks, and optimizes the overhead line cable laying procedure. However, researchers subsequently discovered that directly clamping and fixing the cable using the U-shaped frame and pressure plate results in relative slippage between the cable and the clamp due to insufficient clamping tightness. Utility Model Content

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a wheel-type wire clamp and an insulating crossarm including the wheel-type wire clamp, wherein the wire clamp securely holds the cable by means of the protrusions tightly abutting against the cable sheath.

[0006] To achieve the above objectives, this utility model provides a wheel-type wire clamp, which includes a first U-shaped frame, a second U-shaped frame, and a pulley. The second U-shaped frame is rotatably connected to the inside of the first U-shaped frame via a rotating shaft. The pulley is embedded in and rotatably connected to the second U-shaped frame. A pressure plate is provided on the open side of the first U-shaped frame.

[0007] The base plate of the second U-shaped frame and the pressure plate are respectively provided with through grooves, and the bottom of the through grooves is provided with a plurality of protrusions arranged sequentially along its axial direction; the second U-shaped frame can be rotated to align the two through grooves and form a cavity between the two through grooves for clamping cables.

[0008] As a further improvement of this utility model, the base plate and / or the pressure plate are provided with a clamping block, and the clamping block is provided with the through groove on the side surface opposite to the base plate and / or the pressure plate.

[0009] As a further improvement of this utility model, the base plate and / or the pressure plate are provided with grooves for installing the clamping block.

[0010] As a further improvement of this utility model, the depth of the groove bottom gradually increases from both ends to the middle, and the clamping block has a protrusion on the surface of the side opposite to the through groove to match the bottom of the groove.

[0011] As a further improvement of this utility model, the protrusion is a tooth-like structure, and the tips of the tooth-like structure are arc-shaped.

[0012] As a further improvement of this utility model, the height of the toothed structure gradually increases or decreases from the end of the through groove to the middle of the through groove.

[0013] As a further improvement of this utility model, the surface of the clamping block facing away from the through groove is provided with an array of holes.

[0014] And / or,

[0015] The clamping block is made of hard plastic.

[0016] As a further improvement of this utility model, the pressure plate and / or the bottom plate are provided with ribs on the side surface away from the through groove.

[0017] As a further improvement of this utility model, at least one end of the through groove is a flared opening.

[0018] Another aspect of this utility model is to provide an insulating crossarm, including the wheel clamp, and also including a head fitting, an insulator and an end fitting arranged coaxially in sequence;

[0019] One end of the first end fitting is connected to one end of the insulator, and the other end is connected to either side plate or bottom plate of the first U-shaped frame;

[0020] One end of the end fitting is a connection end for connecting to the pole, and the other end is connected to the end of the insulator opposite to the first end fitting.

[0021] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0022] In summary, the technical solutions conceived by this utility model have the following beneficial effects compared with the prior art:

[0023] (1) The wheel clamp of this utility model and the insulating crossarm therein are provided with a through groove extending in the first direction on the second base plate and the pressure plate of the second U-shaped frame. The bottom of the through groove is provided with a plurality of protrusions arranged in sequence along the axial direction. The protrusions are in close contact with the rubber cable sheath, thereby causing slight deformation to the cable sheath without damage, and thus the second base plate and the pressure plate clamp the cable tightly.

[0024] (2) The wheel-type wire clamp and the insulating crossarm containing it of this utility model are provided with clamping blocks between the through groove and the corresponding plate structure (i.e., the second base plate and the pressure plate). The clamping blocks in the through groove are set away from the surface of the corresponding plate structure. With this setting, when the workers need to replace different protrusions, they can replace them by replacing the clamping blocks instead of directly replacing the corresponding plate structure.

[0025] (3) The wheel-type wire clamp and the insulating crossarm containing it of this utility model are provided with a first groove and a second groove respectively opened on the second base plate and the pressure plate of the second U-shaped frame for installing the first clamping block and the second clamping block. The height of the groove bottom gradually increases from both ends to the middle. A protrusion is provided on the side of the clamping block near the groove to match the bottom of the groove, so as to achieve quick positioning and matching during installation. Furthermore, the matching of the protrusion and the groove can ensure the stability of the position between the clamping block and the plate structure. When the cable tends to slip, the clamping block and the groove still maintain a stable relative position. The protrusion further constrains the cable and avoids relative slippage between the cable and the wire clamp.

[0026] (4) The wheel-type wire clamp and the insulating crossarm containing it of this utility model achieve a stable connection between the clamp block and the plate structure by setting the clamp block in the groove and the corresponding plate structure to be detachable. At the same time, it also facilitates subsequent maintenance and replacement, providing great convenience for maintenance personnel.

[0027] (5) The wheel-type wire clamp and the insulating crossarm containing it of this utility model, by opening a hole-like structure on the clamp block, can reduce the weight of the clamp block as much as possible while ensuring the stability of the clamp block structure, so as to avoid the overall weight of the wire clamp being too large. At the same time, the material of the clamp block is preferably an aging-resistant hard plastic.

[0028] (6) The wheel-type wire clamp of this utility model and the insulating crossarm containing it have a toothed structure for protrusion. The toothed structure on the two through slots can bite and fasten the cable, thereby achieving the fastening and clamping of the cable. The tooth tip of the toothed structure is arc-shaped to avoid scratching the cable sheath and protect the outer layer structure of the cable.

[0029] (7) The wheel-type wire clamp of this utility model and the insulating crossarm therein are provided with ribs on the side of each plate structure away from the corresponding clamp block, thereby enhancing the structural strength of the plate structure and improving the safety of the wire clamp during use.

[0030] (8) The insulating crossarm of this utility model utilizes a combination of wheel clamps, first end fittings, insulators, and end fittings to quickly complete the assembly of the insulating crossarm, meet the application requirements of insulating crossarms in different parts of the pole, simplify the assembly process of the insulating crossarm on the pole, improve the installation efficiency of the pole and overhead line, and reduce the construction and laying cost of overhead line. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the wheel-type wire clamp in an embodiment of this utility model;

[0032] Figure 2 This is a front view of the wheel-type cable clamp excluding the clamping block in an embodiment of this utility model;

[0033] Figure 3 This is a schematic diagram of the overall structure of the first clamping block in an embodiment of this utility model;

[0034] Figure 4 This is a side view of the first clamping block in an embodiment of this utility model;

[0035] Figure 5 This is a top view of the first clamping block in an embodiment of this utility model;

[0036] Figure 6 This is a cross-sectional view of the first clamping block in an embodiment of this utility model;

[0037] Figure 7 This is a schematic diagram of the overall structure of the insulating crossarm in an embodiment of this utility model;

[0038] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Wheel clamp; 101. First U-shaped frame; 102. Second U-shaped frame; 1021. First groove; 103. Pulley; 104. First shaft; 105. Pressure plate; 1051. Second shaft; 1052. Second groove; 106. Connector; 107. First clamping block; 1071. First through slot; 1072. Toothed structure; 1073. First hole; 108. Second clamping block; 109. Rib plate; 2. Head fitting; 3. Insulator; 4. End fitting. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] Example:

[0045] In the preferred embodiment of this utility model, the wheel-type clamp and the insulating crossarm including it are as follows: Figures 1-7 As shown, the wheel-type wire clamp 1 includes a first U-shaped frame 101, a second U-shaped frame 102, a pulley 103, and a pressure plate 105. The first U-shaped frame 101 includes two opposing first side plates and a first base plate connecting one end of the two first side plates, forming an accommodating space between the two first side plates to realize the connection and accommodation of the second U-shaped frame 102 and the pulley 103. Correspondingly, the second U-shaped frame 102 also includes two opposing second side plates and a second base plate connecting one end of the two second side plates. The two free ends of the two second side plates away from the second base plate are rotatably connected to the first U-shaped frame 101 through a first rotating shaft 104.

[0046] like Figure 1 , 2 As shown in Figures 7 and 8, a first rotating shaft 104 is disposed in the first U-shaped frame 101. Both ends of the first rotating shaft 104 are respectively connected to the middle of the length direction of the two first side plates, allowing the second U-shaped frame 102 to rotate around the shaft relative to the first U-shaped frame 101, enabling the second base plate to freely switch between the side closer to the first base plate and the side away from the first base plate. Preferably, the first rotating shaft 104 is a bolt structure and is connected to the first U-shaped frame 101.

[0047] Meanwhile, pulley 103 is installed in the second U-shaped frame 102, and pulley 103 is coaxially arranged with the first rotating shaft 104. By setting the rotatable pulley 103, the cable can be pulled during the cable laying process. After the cable is pulled into place, the second U-shaped frame 102 is rotated so that its second base plate flips upward to lift the cable. To further explain, the direction of cable pulling movement is taken as the first direction, the height direction is taken as the vertical direction, and the horizontal direction is the direction perpendicular to the first direction and the height direction respectively.

[0048] Based on the aforementioned basic setup, a pressure plate 105 is provided on the open side of the first U-shaped frame 101. The pressure plate 105 is arranged laterally, with one end rotatably connected to the free end of one of the first side plates, and the other end detachably connected to the free end of another first side plate via a connector 106. This allows the cable to be lifted by the second base plate of the second U-shaped frame 102, and the cable to be clamped by the second base plate and the pressure plate 105. Furthermore, one end of the pressure plate 105 is hinged to the end of the first side plate via a second pivot 1051, allowing the pressure plate 105 to be flipped up and down under the rotation of the second pivot 1051. More preferably, in order to facilitate the detachable connection between the pressure plate 105 and the first side plate, the free end of the first side plate is set as a horizontally folded edge, that is, its end fold is preferably set parallel to the first bottom plate. Correspondingly, the connector 106 is preferably a bolt structure, so that when the pressure plate 105 is in the lower cover state, the pressure plate 105 can be parallel to the end of the first side plate, thereby facilitating the bolt connection between the two by the connector 106.

[0049] Furthermore, the second base plate and the pressure plate 105 are respectively provided with through slots extending through both ends. When the second base plate and the pressure plate 105 are aligned, the through slots extend along the first direction, and corresponding to the bottom of the through slots, there are multiple protrusions arranged sequentially along the axis of the through slots. The two through slots are aligned face-to-face under the action of the second base plate and the pressure plate 105 to form a space for clamping the cable. The protrusions are in close contact with the cable sheath, thereby causing a slight deformation of the cable sheath, and thus achieving the clamping and fixing of the cable by the second base plate and the pressure plate 105. The ends of the protrusions away from the bottom of the through slots have an arc structure so as not to scratch or damage the cable sheath while squeezing it.

[0050] Furthermore, a through groove can also be provided on the clamping block, wherein a first clamping block 107 is provided corresponding to the second base plate, and a second clamping block 108 is provided corresponding to the pressure plate 105. The side wall of the clamping block away from its corresponding plate structure is provided with a through groove, and the clamping block clamps the cable by aligning the two clamping blocks. More preferably, corresponding grooves can be formed on the second base plate and the pressure plate 105 for installing the clamping blocks.

[0051] Furthermore, the second base plate of the second U-shaped frame 102 is provided with a first groove 1021 recessed inward toward the pulley 103, and a first clamping block 107 is provided inside the first groove 1021. The pressure plate 105 is provided with a second groove 1052 recessed away from the pulley 103, and a second clamping block 108 is also provided in the second groove 1052. A first through groove 1071 extending in a first direction is opened on the surface of the first clamping block 107 away from the second base plate, and a second through groove extending in a first direction is opened on the surface of the second clamping block 108 away from the pressure plate 105. When the second U-shaped frame 102 is flipped upward and the second base plate and the pressure plate 105 are facing each other, the two clamping blocks match and align. At the same time, a cavity for clamping the cable is formed between the two through grooves, and the distance between the bottom of the two through grooves does not exceed the outer diameter of the cable, so that the two clamping blocks clamp and fix the cable.

[0052] Furthermore, the first groove 1021 is a through groove structure arranged along the first direction. The depth of the groove bottom of the first groove 1021 gradually increases from both ends of the first direction towards the middle to form a V-shaped structure in cross-section. Correspondingly, a first protrusion is provided at the bottom of the first clamping block 107. The first protrusion gradually rises from both ends of the first direction towards the middle, so that the first protrusion matches the first groove 1021. During installation, the first protrusion can be precisely embedded in the first groove 1021, thereby achieving the matching of the first clamping block 107 and the first groove 1021 and the positioning during installation. More preferably, the first protrusion and the first clamping block 107 are integrally formed. Meanwhile, the protrusion on the first clamp 107 is in close contact with the cable sheath and causes a slight deformation of the cable sheath. At this time, the cable sheath can cover the protrusion to a certain extent. When the cable attempts to slide along the first direction, the first clamp 107 abuts against the first groove 1021, thereby restricting the movement of the first clamp 107. Then, the cable is limited by the protrusion, thereby ensuring the fastening performance between the cable and the clamp.

[0053] Furthermore, a first limiting component corresponding to the first groove 1021 can also be provided on the second U-shaped frame 102. The first limiting component includes two first baffles provided at both ends of the second U-shaped frame 102 in the first direction to limit the first clamping block 107 in the first direction. Similarly, the first baffles cannot block the first through groove 1071 area of ​​the first clamping block 107 in the first direction to avoid affecting the clamping function.

[0054] In addition, the matching method between the second groove 1052 and the second clamping block 108 is the same as the matching method between the first groove 1021 and the first clamping block 107, and will not be described again here.

[0055] Furthermore, the docking relationship between the first clamping block 107 and the first groove 1021 can be varied.

[0056] In one embodiment, during the installation of the first clamping block 107 and the first groove 1021, glue is applied to the first groove 1021 to glue the two together after the first groove 1021 and the first clamping block 107 are positioned and matched. However, this method is inconvenient for later replacement.

[0057] In a preferred embodiment, two through holes are respectively provided on the two lateral sides of the first groove 1021, and corresponding screw holes are provided on the first clamping block 107 that penetrate through its two lateral sides. The screw is inserted into the two through holes and the screw holes to fix the first clamping block 107 in the first groove 1021. The highest point of the two through holes and the screw holes in the vertical direction will not exceed the groove depth of the first through groove 1071, that is, to avoid affecting the first through groove 1071.

[0058] To further explain, the connection between the second clamping block 108 and the second groove 1052 can also be by adhesive or bolt connection, which is the same as the connection between the first clamping block 107 and the first groove 1021, and will not be described again here.

[0059] Furthermore, such as Figures 3-6 As shown, an array of first holes 1073 are formed on the surface of the first clamping block 107 near the first groove 1021, so that the weight of the first clamping block 107 is reduced as much as possible while ensuring structural stability. More preferably, the first holes 1073 are arranged in three rows at intervals along the lateral direction, wherein the middle row is directly opposite the first through groove 1071 and the first holes 1073 there are blind holes, while the two rows of first holes 1073 on both sides are through holes. Further explanation: the second clamping block 108 is also provided with second holes, and the arrangement of the second holes is the same as that of the first holes 1073, which will not be described again here.

[0060] Furthermore, the protrusions in the first through groove 1071 and the second through groove can be of various types, including dot-shaped protrusions arranged in an array, strip-shaped protrusions arranged sequentially at intervals along the axial direction, or threaded protrusions.

[0061] In another embodiment, the protrusion is a toothed structure 1072, which is a plurality of such protrusions arranged sequentially along the first direction. When the two clamping blocks are matched and fitted together, the toothed structures 1072 arranged in the two through slots abut against the cable respectively, thereby clamping and fastening the cable to secure it. The toothed structures 1072 press against the cable sheath, so that the cable sheath deforms while achieving a tight fit between the cable sheath and the outer wall of the toothed structure 1072. Furthermore, the toothed structure 1072 is an arc-shaped toothed structure, and the outer diameter of the outer wall surface of the toothed structure 1072 gradually decreases from one end to the other along the first direction. At the same time, the toothed structure 1072 can be a group arranged sequentially along the first direction, and the height of each toothed structure 1072 in the group gradually increases from one end to the other along the first direction. Alternatively, the toothed structure 1072 can be two groups arranged sequentially from the middle of the through groove to both sides of the first direction, and the height of the toothed structure 1072 in the same group gradually increases from one end to the other along the first direction, so that the height of the toothed structure 1072 gradually increases or decreases from the end of the through groove to the middle of the through groove.

[0062] Furthermore, to prevent the toothed structure 1072 from damaging the cable sheath, the tips of the teeth of the toothed structure 1072 are rounded. More preferably, the clamping block is made of rigid plastic, and to ensure its service life, it is preferably made of aging-resistant plastic.

[0063] Furthermore, both the first through groove 1071 and the second through groove are semi-circular. Each through groove includes a first groove body and two second groove bodies disposed at both ends of the first groove body in a first direction. The diameter of the second groove body gradually increases from one end near the first groove body to the other end, so that after the two clamping blocks are matched and fitted, the two adjacent second grooves match to form a funnel-shaped opening. The diameter of the opening near the outer end is larger to facilitate the cable being guided into the space formed by the two through grooves when the two clamping blocks are facing each other. Also, when the second U-shaped frame 102 rotates, the end design of the first through groove 1071 enables the first through groove 1071 to quickly match with the cable.

[0064] Furthermore, the plate structure of the second base plate of the second U-shaped frame 102 is recessed downwards, and a rib plate 109 is provided on the side of the second base plate away from the first clamping block 107. The rib plate 109 is distributed on both sides of the recessed plate structure to enhance the strength of the plate structure at this location. Correspondingly, the plate structure of the pressure plate 105 is also protruding, and a rib plate 109 is provided on the side of the pressure plate 105 away from the second clamping block 108. The rib plate 109 is distributed on both sides of the protruding plate structure.

[0065] As another aspect of this utility model, in the preferred embodiment, an insulating crossarm based on the wheel clamp 1 is further provided. The insulating crossarm also includes a first end fitting 2, an insulator 3 and an end fitting 4 arranged coaxially in sequence. One end of the first end fitting 2 is connected to one end of the insulator 3 and the other end is connected to the first U-shaped frame 101. One end of the end fitting 4 is a connection end for connecting to the pole, and the other end is connected to the end of the insulator 3 opposite to the first end fitting 2.

[0066] To further explain, the first end fitting 2 can be connected to the first base plate or any first side plate of the first U-shaped frame 101.

[0067] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wheel-type wire clamp, characterized in that, It includes a first U-shaped frame, a second U-shaped frame, and pulleys. The second U-shaped frame is rotatably connected to the inside of the first U-shaped frame via a rotating shaft. The pulleys are embedded in and rotatably connected to the second U-shaped frame. A pressure plate is provided on the open side of the first U-shaped frame. The base plate of the second U-shaped frame and the pressure plate are respectively provided with through grooves, and the bottom of the through grooves is provided with a plurality of protrusions arranged sequentially along its axial direction; the second U-shaped frame can be rotated to align the two through grooves and form a cavity between the two through grooves for clamping cables.

2. The wheel-type cable clamp according to claim 1, wherein, The base plate and / or the pressure plate are provided with clamping blocks, and the clamping blocks are provided with the through groove on the side surface opposite to the base plate and / or the pressure plate.

3. The wheel-type wire clamp according to claim 2, wherein, The base plate and / or the pressure plate are provided with grooves for installing the clamping blocks.

4. The wheel-type cable clamp according to claim 3, wherein, The groove bottom depth gradually increases from its two ends to the middle, and the clamping block has a protrusion on the side of its surface away from the through groove to match the bottom of the groove.

5. The wheel-type clamp according to any one of claims 1 to 4, wherein, The protrusion has a tooth-like structure, and the tips of the teeth are arc-shaped.

6. The wheel-type wire clamp according to claim 5, wherein, The height of the toothed structure gradually increases or decreases from the end of the through groove towards the middle of the through groove.

7. The wheel-type clamp according to any one of claims 2 to 4, wherein, The surface of the clamping block opposite to the through groove is provided with an array of holes. And / or, The clamping block is made of hard plastic.

8. The wheel-type wire clamp according to any one of claims 1 to 4 and 6, wherein, The pressure plate and / or the bottom plate are provided with ribs on the side surface away from the through groove.

9. The wheel-type wire clamp according to any one of claims 1 to 4 and 6, wherein, At least one end of the through groove is a flared opening.

10. An insulating crossarm, comprising a wheel-type clamp as described in any one of claims 1 to 9, characterized in that, The insulating crossarm also includes a head fitting, an insulator, and an end fitting arranged coaxially in sequence. One end of the first end fitting is connected to one end of the insulator, and the other end is connected to either side plate or bottom plate of the first U-shaped frame; One end of the end fitting is a connection end for connecting to the pole, and the other end is connected to the end of the insulator opposite to the first end fitting.

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