Variable diameter power line clamp compression installation tool

Abstract

The application provides a variable-diameter power line clamp compression installation tool which solves the problems of internal variable-diameter of the power line clamp, and comprises a pair of hinged clamp holders, an arc-shaped line clamping groove is arranged between the clamp holders, a manual clamping assembly is installed between the ends of the clamp holders far from the hinge, a variable-diameter adjusting assembly is installed on the clamp holder opposite to the line clamping groove, and a transmission assembly is arranged between the variable-diameter adjusting assembly and the manual clamping assembly. The application has the advantages of flexible use, stable structure and the like.

Description

Technical Field

[0001] This invention belongs to the field of power line clamp assembly technology, specifically relating to a variable diameter power line clamp compression installation tool. Background Technology

[0002] With the development of technology, a 360° rotating clamp has emerged as a type of spacer in power fittings. This rotating clamp consists of a rotating body, a rubber pad, and fasteners. According to design requirements, the inner diameter of the rubber pad must be smaller than the outer diameter of the conductor. Therefore, additional pressure (far exceeding the strength of a human arm) must be applied during installation to compress and deform the rubber pad. However, existing installation tools often cannot provide sufficient compressive deformation force. Furthermore, they have poor adaptability to different wire diameters and cannot flexibly adjust the diameter.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a parallel groove clamp installation tool, application number 202010733833.4, which includes a connecting frame and a support rod disposed below the connecting frame. The connecting frame is equipped with a parallel groove clamping mechanism and a lead wire clamping mechanism. The lead wire clamping mechanism includes a support frame fixed on the connecting frame, a connecting rod hinged to the support frame, an operating arm hinged to the support frame, a connecting rod hinged to the connecting rod and the operating arm respectively, a top rod slidingly connected to the connecting rod, and a lead wire pressure block disposed at one end of the top rod near the connecting frame. A positioning mechanism for positioning the top rod is provided between the top rod and the connecting rod.

[0004] The above solution has solved the problem of applying force during wire clamp installation to some extent, but it still has many shortcomings, such as the inability to flexibly change the diameter. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a reasonably designed, flexible, and adjustable diameter power line clamp compression installation tool.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a variable diameter power line clamp compression installation tool, comprising a pair of hinged clamp seats, an arc-shaped clamping groove provided between the clamp seats, a manual clamping component installed between the ends of the clamp seats away from the hinge, a variable diameter adjustment component installed on the clamp seats opposite to the clamping groove, and a transmission component provided between the variable diameter adjustment component and the manual clamping component.

[0007] In the aforementioned variable diameter power line clamp compression installation tool, the manual clamping assembly includes flip grooves respectively disposed at the ends of two clamping seats. One flip groove is rotatably connected to a flip rod, which can be flipped into the other flip groove. A clamping sleeve is threadedly connected to the flip rod. The clamping sleeve moves axially relative to the flip rod to press and fix the closed clamping seat. A fitting piece is rotatably mounted on one end of the clamping sleeve opposite to the clamping seat via a rotating bearing. A radially extending rotating handle is installed on the other end of the clamping sleeve, and an adapter hole is opened at the end.

[0008] In the aforementioned variable diameter power line clamp compression installation tool, the variable diameter adjustment assembly includes an adjustment hole located in the middle of the clamp seat. An adjustment sleeve is installed in the adjustment hole via a rotating bearing. An adjustment shaft is threadedly connected inside the adjustment sleeve. One end of the adjustment shaft has an adjustment hole, and the other end of the adjustment shaft is connected to a clamping piece located inside the clamping groove. A limit sleeve is inserted into the adjustment hole of the adjustment shaft. Limiting teeth and limit grooves are respectively provided between the limit sleeve, the adjustment hole, and the clamp seat, and the limit teeth and limit grooves limit the circumferential movement of the adjustment shaft and the clamp seat.

[0009] In the aforementioned variable diameter power line clamp compression installation tool, the transmission assembly includes switching grooves symmetrically arranged on both sides of the clamping sleeve and extending axially. A rotating handle passes through the switching groove and can be slidably adjusted to adjust its axial position relative to the switching groove. The rotating handle is slidably fixed to the first or second position along the switching groove. A main sleeve is rotatably installed inside the clamping sleeve, which is in direct contact with the flipping rod and is threadedly connected. A secondary sleeve is rotatably installed between the clamping sleeve and the main sleeve. The lower end of the main sleeve is rotatably connected to the fitting piece. The lower end of the secondary sleeve is drivenly connected to the adjusting sleeve through a linkage assembly. A switching assembly is provided between the main sleeve, the secondary sleeve, and the rotating handle.

[0010] In the aforementioned variable diameter power line clamp compression installation tool, the switching assembly includes a switching shaft disposed in the middle of the rotating handle. The switching shaft is axially slidably connected to the flipping rod and an elastic reset element is disposed between them. The switching shaft and the main sleeve are respectively provided with first transmission teeth arranged circumferentially and meshing with each other. The switching shaft and the auxiliary sleeve are respectively provided with second transmission teeth arranged circumferentially and meshing with each other. The first transmission teeth and the second transmission teeth are selectively engaged when the manual position of the rotating handle is switched.

[0011] In the aforementioned variable diameter power line clamp compression installation tool, the rotary handle includes a main handle and an auxiliary handle that are threaded together. The upper end of the switching shaft is provided with a handle sleeve for the main handle to pass through, and expansion holes are opened at the ends of the main handle and the auxiliary handle.

[0012] In the aforementioned variable diameter power line clamp compression installation tool, the linkage assembly includes a first linkage toothed ring fixed to the lower end of the secondary sleeve and circumferentially surrounding it; a variable speed gear set rotatably mounted in the clamp seat and meshing with the first linkage toothed ring; a linkage gear rod rotatably mounted in the clamp seat and meshing with the variable speed gear set; and a linkage gear rod meshing with a second linkage toothed ring circumferentially outside the adjusting sleeve.

[0013] In the aforementioned variable diameter power line clamp compression installation tool, the clamp base is made of aluminum alloy, and several current transformers are installed inside the clamp base.

[0014] In the aforementioned variable diameter power line clamp compression installation tool, the clamp seat has a transmission cavity inside for assembling the variable diameter adjustment component and the transmission component, and the transmission cavity is closed by a cover plate covering the clamp seat.

[0015] In the aforementioned variable diameter power line clamp compression installation tool, the manual clamping component is equipped with an indicator scale.

[0016] Compared with existing technologies, the advantages of this invention are as follows: the combination of clamping and fixing the wire clamp and adjusting the inner diameter of the wire clamp allows for flexible switching of the transmission path to meet the requirements of adjusting the diameter of the wire clamp; the use of a threaded transmission structure and a rotating handle provides greater clamping force and higher adjustment accuracy, while also having a self-locking function; rotating bearings are used between the clamping sleeve and the bonding plate, and between the adjusting sleeve and the clamping seat, which greatly reduces the frictional resistance during rotation, making the operation smoother and protecting the contact surfaces from wear. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a structural cross-sectional view of the present invention;

[0019] Figure 3 This is a partial cross-sectional view of the present invention;

[0020] Figure 4 This is a partial cross-sectional view of the linkage component of the present invention;

[0021] Figure 5 This is a partial cross-sectional view of the switching component of the present invention;

[0022] In the figure, the components are: clamp 1, transmission cavity 11, cover plate 12, indicator scale 13, wire clamping groove 2, manual clamping assembly 3, flipping groove 31, flipping rod 32, clamping sleeve 33, fitting piece 34, rotating handle 35, adapter hole 36, diameter adjustment assembly 4, adjustment hole 41, adjustment sleeve 42, adjustment shaft 43, wire clamping piece 44, limiting tooth 46, limiting groove 47, transmission assembly 5, switching groove 51, main sleeve 52, auxiliary sleeve 53, linkage assembly 6, first linkage gear ring 61, speed change gear set 62, linkage gear rod 63, second linkage gear ring 64, switching assembly 7, switching shaft 71, elastic reset piece 72, first transmission tooth 73, second transmission tooth 74, main handle 75, auxiliary handle 76, handle sleeve 77, and expansion hole 78. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-5 As shown, a variable diameter power line clamp compression installation tool includes a pair of hinged clamps 1, with an arc-shaped clamping groove 2 between the clamps 1 for accommodating the power line clamp. A manual clamping assembly 3 is installed between the ends of the clamps 1 away from the hinge for closing and locking the clamps 1. A variable diameter adjustment assembly 4 is installed on the clamps 1 opposite to the clamping groove 2, for driving the clamping plate 44 to move to change the inner diameter of the clamp to accommodate different specifications of wires. A transmission assembly 5 is provided between the variable diameter adjustment assembly 4 and the manual clamping assembly 3 to realize the switching and power transmission of clamping and variable diameter functions under a single power source.

[0025] Specifically, the manual clamping assembly 3 includes flip grooves 31 respectively located at the ends of two clamping seats 1. One flip groove 31 is rotatably connected to a flip rod 32, which can be flipped into the other flip groove 31 to realize the opening and closing operation of the clamping seats. A clamping sleeve 33 is threadedly connected to the flip rod 32. The clamping sleeve 33 moves axially relative to the flip rod 32 to press and fix the closed clamping seat 1; this threaded pair converts the rotational motion into a strong axial locking force. A fitting piece 34 is rotatably mounted on the end of the clamping sleeve 33 opposite to the clamping seat 1 through a rotary bearing to ensure that the clamping force is evenly applied to the end face of the clamping seat, while allowing the clamping sleeve 33 to rotate freely without frictional resistance. A radially extending rotary handle 35 is installed at the other end of the clamping sleeve 33 as the main force-applying component, and an adapter hole 36 is opened at the end for connecting an extension rod or measuring equipment.

[0026] Specifically, the variable diameter adjustment assembly 4 includes an adjustment hole 41 located in the middle of the clamp 1. An adjustment sleeve 42 is installed in the adjustment hole 41 via a rotating bearing, allowing the adjustment sleeve 42 to rotate freely within the hole. An adjustment shaft 43 is threadedly connected inside the adjustment sleeve 42, and rotating the adjustment sleeve 42 drives the adjustment shaft 43 to move axially. One end of the adjustment shaft 43 has an adjustment hole 41, and the other end of the adjustment shaft 43 is connected to a clamping plate 44 located inside the clamping groove 2, which directly acts on the inner wall of the clamp to change its inner diameter. A limiting sleeve 45 is inserted into the adjustment hole 41 of the adjustment shaft 43. A limiting tooth 46 and a limiting groove 47 are respectively provided between the limiting sleeve 45, the adjustment hole 41, and the clamp 1, which slide and insert into each other. The limiting tooth 46 and the limiting groove 47 limit the adjustment shaft 43 and the clamp 1 circumferentially, preventing the adjustment shaft 43 from rotating on its own and ensuring that it only performs precise axial feed movements.

[0027] Furthermore, the transmission assembly 5 includes switching grooves 51 symmetrically arranged on both sides of the clamping sleeve 33 and extending axially. A rotating handle 35 passes through the switching groove 51 and can be slidably adjusted to its axial position relative to the switching groove 51. The rotating handle 35 is slidably fixed along the switching groove 51 to the first station corresponding to the clamping function or the second station corresponding to the diameter adjustment function. The switching groove 51 is a physical guide structure for realizing the switching of operation modes. A main sleeve 52, which is directly in contact with the flipping rod 32 and threadedly connected, is rotatably installed inside the clamping sleeve 33. The main sleeve 52 is the core transmission component for the clamping action, and its rotation drives the clamping sleeve 33 to move axially. A secondary sleeve 53 is rotatably installed between the clamping sleeve 33 and the main sleeve 52. The secondary sleeve 53 is the power transmission component for the diameter adjustment action. The lower end of the main sleeve 52 is rotatably connected to the fitting piece 34, transmitting axial pressure but allowing relative rotation. The lower end of the secondary sleeve 53 is connected to the adjusting sleeve 42 via the linkage assembly 6, ultimately transmitting the power from the rotating handle 35 to the adjusting sleeve 42. A switching assembly 7 is provided between the main sleeve 52 and the auxiliary sleeve 53 and the rotary handle 35, which is used to selectively transmit the power of the rotary handle to the main sleeve 52 or the auxiliary sleeve 53 according to the work position.

[0028] Furthermore, the switching assembly 7 includes a switching shaft 71 located in the middle of the rotary handle 35. The switching shaft 71 is axially slidably connected to the flipping rod 32, and an elastic reset member 72 is provided between them. The elastic reset member 72 uses a spring to provide axial reset force, ensuring stable engagement or smooth disengagement of the transmission teeth. The switching shaft 71 and the main sleeve 52 are respectively provided with first transmission teeth 73 arranged circumferentially and meshing with each other. The switching shaft 71 and the auxiliary sleeve 53 are respectively provided with second transmission teeth 74 arranged circumferentially and meshing with each other. The first transmission teeth 73 and the second transmission teeth 74 are selectively engaged depending on the position of the rotary handle 35. When the rotary handle 35 slides to the first position, the switching shaft 71 moves upward to engage the first transmission teeth 73, and the power is transmitted to the main sleeve 52 to perform clamping. When it slides to the second position, the switching shaft 71 moves downward to compress the elastic reset member 72 to engage the second transmission teeth 74, and the power is transmitted to the auxiliary sleeve 53 to perform diameter adjustment.

[0029] In addition, the rotary handle 35 includes a main handle 75 and an auxiliary handle 76 that are threaded together. By turning the auxiliary handle 76, the lever arm can be extended, significantly reducing effort when greater torque is required, such as in diameter adjustment. A handle sleeve 77 is provided at the upper end of the switching shaft 71 for the main handle 75 to pass through, serving as an axial sliding guide and support for the main handle 75. Expansion holes 78 are provided at the ends of the main handle 75 and the auxiliary handle 76 to facilitate the installation of extension rods, socket wrenches, or suspension devices.

[0030] Meanwhile, the linkage assembly 6 includes a first linkage gear ring 61 fixed to the lower end of the secondary sleeve 53 and circumferentially surrounding it. A variable speed gear set 62, meshing with the first linkage gear ring 61, is rotatably mounted inside the clamp 1. The variable speed gear set 62 can be designed as a speed reduction and torque amplification mechanism, reducing the rotational speed of the secondary sleeve 53 and amplifying the torque before output, making the diameter adjustment operation more labor-saving. A linkage gear rod 63, meshing with the variable speed gear set 62, is rotatably mounted inside the clamp 1, changing the direction of power transmission. The linkage gear rod 63 meshes with a second linkage gear ring 64 circumferentially outward of the adjusting sleeve 42, ultimately driving the adjusting sleeve 42 to rotate.

[0031] As can be seen, clamp 1 is made of aluminum alloy, which significantly reduces the weight of the tool while ensuring structural strength, making it easy to carry and operate. Several current transformers are installed inside clamp 1, which can monitor the current passing through the clamp in real time online, for verifying crimping quality or monitoring load.

[0032] Clearly, the clamp 1 has a transmission cavity 11 inside for assembling the variable diameter adjustment component 4 and the transmission component 5, which integrates and encapsulates part of the precision transmission mechanism of the linkage component 6 and the switching component 7 for protection. The transmission cavity 11 is sealed by a cover plate 12 covering the clamp 1 to prevent dust and foreign objects from entering and affecting the transmission, and to improve the overall structural strength and aesthetics.

[0033] Preferably, the manual clamping component 3 is provided with an indicator scale 13, such as on the clamping sleeve 33 or the flipping rod 32, to visually display the clamping stroke or the relative clamping force, and to assist the operator in achieving standardized and consistent clamping operations or reaching the preset clamping force value. Example 1

[0034] In this embodiment, the clamp 1 is closed and the wire clamp is pressed and fixed. First, the power wire clamp to be installed is placed in the clamping groove 2 of a pair of hinged clamps 1, ensuring that the wire clamp fits the arc contour of the clamping groove 2. Hold the flipping rod 32 to lift it from the initial flipping groove 31, rotate it across to the flipping groove 31 at the end of the other clamp 1, so that the two clamps 1 close and cover the wire clamp.

[0035] The rotary handle 35 is then slid along the switching groove 51 to the first position. At this time, the switching shaft 71 moves upward under the action of the elastic reset member 72, the first transmission gear 73 engages, and the power transmission path is connected to the main sleeve 52. The rotary handle 35 is gripped and rotated clockwise. Power is transmitted to the main sleeve 52 through the switching shaft 71 and the first transmission gear 73. The threaded transmission between the main sleeve 52 and the flipping rod 32 causes the clamping sleeve 33 to move downward along the axial direction of the flipping rod 32. The clamping sleeve 33 applies pressure evenly through the fitting piece 34, pressing the closed clamp 1 tightly, causing the wire clamp to undergo plastic deformation and firmly bond with the wire. The indicator scale 13 can display the clamping stroke or pressure value in real time.

[0036] Once the preset clamping force or stroke is reached, stop rotating. Turn the handle 35 counterclockwise to move the clamping sleeve 33 upward to release the pressure, and flip the flipping rod 32 back to its original position to open the clamp seat 1 and remove the installed wire clamp. Example 2

[0037] In this embodiment, the inner diameter of the wire clamp is adjusted. With the clamp seat 1 closed, the rotating handle 35 is slid down along the switching groove 51 to the second position. This action compresses the elastic reset member 72, causing the switching shaft 71 to move down, disengaging the first transmission gear 73 and engaging the second transmission gear 74, thus switching the power transmission path to the auxiliary sleeve 53.

[0038] Rotating the handle 35 transmits power to the auxiliary sleeve 53 via the switching shaft 71 and the second transmission gear 74. The first linkage gear ring 61 at the lower end of the auxiliary sleeve 53 drives the speed-changing gear set 62 to reduce speed and increase torque. The speed-changing gear set 62 drives the linkage gear rod 63 to rotate, and the linkage gear rod 63 then meshes with the second linkage gear ring 64 on the outer side of the adjusting sleeve 42, ultimately driving the adjusting sleeve 42 to rotate within the adjusting hole 41.

[0039] The rotation of the adjusting sleeve 42 is converted into the axial movement of the adjusting shaft 43 through its internal thread transmission. Due to the circumferential limiting effect of the limiting teeth 46 and the limiting groove 47, the adjusting shaft 43 cannot rotate. The clamping plate 44 at the end of the adjusting shaft 43 then extends and retracts inside the clamping groove 2, pushing the inner wall of the clamp to increase or decrease its inner diameter. Finally, observe the matching degree between the clamp and the wire, and stop rotating the handle 35 after adjusting to the appropriate inner diameter. Example 3

[0040] In this embodiment, the wire clamp is adjusted before tightening. The wire clamp is placed into the clamping groove 2 of the clamping seat 1, and the flipping rod 32 is closed. The sliding and rotating handle 35 is moved to the second position. Rotating the handle 35 drives the linkage component 6, which in turn drives the adjusting sleeve 42 to rotate, causing the adjusting shaft 43 to push the clamping plate 44 to move, pre-adjusting the inner diameter of the wire clamp to be slightly smaller than the outer diameter of the wire.

[0041] Insert the wire into the pre-adjusted wire clamp and slide the rotating handle 35 to the first position. Vigorously rotate the handle 35 to drive the main sleeve 52, causing the clamping sleeve 33 to move downwards and forcefully press against the clamp seat 1, causing permanent deformation of the wire clamp body and forming a reliable electrical and mechanical connection with the wire. During the process, the current transformer can monitor the resistance of the crimping point in real time. Finally, after confirming that the crimping quality meets the standards based on the current reading or the indicator scale 13, loosen the clamping sleeve 33, open the flip lever 32, and remove the tool.

[0042] In summary, the principle of this embodiment is as follows: axial position switching is achieved by rotating handles 35 that are slidably installed in the switching slots 51 on both sides of the clamping sleeve 33, driving the switching shaft 71 to compress the elastic reset member 72 to selectively engage the first transmission gear 73 or the second transmission gear 74, thereby diverting the single rotational input power to two independent transmission paths. When switching to the first position, the power is converted into the axial pressing motion of the clamping sleeve 33 through the threaded pair of the main sleeve 52 and the flipping rod 32 to lock the clamping seat 1. When switching to the second position, the power drives the speed change gear set 62, the linkage gear rod 63 and the second linkage gear ring 64 of the adjusting sleeve 42 through the first linkage gear ring 61 at the lower end of the auxiliary sleeve 53, so that the rotational motion of the adjusting sleeve 42 is converted into the precise axial displacement of the adjusting shaft 43 through its internal thread. Its circumferential degree of freedom is suppressed by the limiting teeth 46 and the limiting groove 47, and finally pushes the clamping piece 44 to achieve stepless adjustment of the inner diameter of the clamp.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0044] Although this article uses a lot of terms such as clamp 1, transmission cavity 11, cover plate 12, indicator scale 13, wire clamping groove 2, manual clamping assembly 3, flip groove 31, flip rod 32, clamping sleeve 33, fitting piece 34, rotating handle 35, adapter hole 36, diameter adjustment assembly 4, adjustment hole 41, adjustment sleeve 42, adjustment shaft 43, wire clamping piece 44, limiting tooth 46, limiting groove 47, transmission assembly 5, switching groove 51, main sleeve 52, auxiliary sleeve 53, linkage assembly 6, first linkage gear ring 61, speed change gear set 62, linkage gear rod 63, second linkage gear ring 64, switching assembly 7, switching shaft 71, elastic reset piece 72, first transmission tooth 73, second transmission tooth 74, main handle 75, auxiliary handle 76, handle sleeve 77, expansion hole 78, etc., the possibility of using other terms cannot be ruled out. The use of these terms is merely for the convenience of describing and explaining the nature of the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A variable diameter power line clamp compression installation tool comprising a pair of hinged clamp holders (1) with an arcuate wire clamping groove (2) disposed between the clamp holders (1), and a manual clamping assembly (3) mounted between the clamp holders (1) distal from the hinge, characterized in that, The clamping seat (1) is provided with a variable-diameter adjusting assembly (4) opposite to the wire clamping groove (2), and the variable-diameter adjusting assembly (4) is provided with a transmission assembly (5) between the manual clamping assembly (3). The manual clamping assembly (3) comprises two turnover grooves (31) arranged at the end of the two clamping seats (1) respectively, one of the turnover grooves (31) is rotationally connected with a turnover rod (32) and the turnover rod (32) can be turned into the other turnover groove (31), the turnover rod (32) is threadedly connected with a clamping sleeve (33), and the clamping sleeve (33) is axially moved relative to the turnover rod (32) to press and fix the closed clamping seat (1); one end of the clamping sleeve (33) opposite to the clamping seat (1) is rotationally installed with a contact piece (34) through a rotating bearing, and the other end of the clamping sleeve (33) is provided with a rotary handle (35) extending in the radial direction and provided with an adapter hole (36) at the end. The variable-diameter adjusting assembly (4) comprises an adjusting hole (41) arranged in the middle of the clamping seat (1), the adjusting hole (41) is rotationally installed with an adjusting sleeve (42) through a rotating bearing, the adjusting sleeve (42) is threadedly connected with an adjusting shaft (43) inside, one end of the adjusting shaft (43) is provided with an adjusting hole (41), and the other end of the adjusting shaft (43) is connected with a wire clamping piece (44) located inside the wire clamping groove (2); the adjusting hole (41) of the adjusting shaft (43) is inserted with a limiting sleeve (45), the limiting sleeve (45) is provided with a limiting tooth (46) and a limiting groove (47) which are slidably inserted between the adjusting hole (41) and the clamping seat (1) respectively, and the limiting tooth (46) and the limiting groove (47) limit the adjusting shaft (43) and the clamping seat (1) circumferentially.

2. The variable diameter power line clamp compression installation tool of claim 1, wherein, The transmission assembly (5) comprises switch grooves (51) symmetrically arranged on both sides of the clamping sleeve (33) and extending in the axial direction, the rotary handle (35) passes through the switch grooves (51) and can slidably adjust the axial position of the rotary handle (35) relative to the switch grooves (51), and the rotary handle (35) is slidably fixed to a first station or a second station along the switch grooves (51); the clamping sleeve (33) is rotationally installed with a main sleeve (52) which is in direct contact with the turnover rod (32) and is threadedly connected, the clamping sleeve (33) and the main sleeve (52) are rotationally installed with a secondary sleeve (53), the lower end of the main sleeve (52) is rotationally connected with the contact piece (34), the lower end of the secondary sleeve (53) is transmissionally connected with the adjusting sleeve (42) through a linkage assembly (6), and the main sleeve (52) and the secondary sleeve (53) are provided with a switch assembly (7) between the rotary handle (35).

3. The variable diameter power pinching compression installation tool of claim 2, wherein, The switching assembly (7) comprises a switching shaft (71) arranged in the middle of the rotary handle (35), the switching shaft (71) is in axial sliding connection with the turnover rod (32) and an elastic reset member (72) is arranged between the switching shaft (71) and the turnover rod (32), the switching shaft (71) and the main sleeve (52) are respectively provided with first transmission teeth (73) arranged in a circumferential direction and engaged with each other, the switching shaft (71) and the auxiliary sleeve (53) are respectively provided with second transmission teeth (74) arranged in a circumferential direction and engaged with each other, and the first transmission teeth (73) and the second transmission teeth (74) are selectively engaged with each other with the work position of the rotary handle (35).

4. The variable diameter power pinching compression installation tool of claim 3, wherein, The rotary handle (35) comprises a main handle (75) and an auxiliary handle (76) which are threadedly connected with each other, the switching shaft (71) is provided with a handle sleeve (77) through which the main handle (75) passes, and the main handle (75) and the auxiliary handle (76) are provided with expansion holes (78) at the ends thereof.

5. The variable diameter power pinching compression installation tool of claim 2, wherein, The linkage assembly (6) comprises a first linkage tooth ring (61) fixed to the lower end of the auxiliary sleeve (53) and arranged in a circumferential direction, the clamping seat (1) is rotatably provided with a gear shifting gear set (62) engaged with the first linkage tooth ring (61), the clamping seat (1) is rotatably provided with a linkage gear rod (63) engaged with the gear shifting gear set (62), and the linkage gear rod (63) is engaged with a second linkage tooth ring (64) arranged on the circumferential outer side of the adjusting sleeve (42).

6. The variable diameter power pinching compression installation tool of claim 1, wherein, The clamping seat (1) is made of aluminum alloy, and a plurality of current transformers are arranged in the clamping seat (1).

7. The variable diameter power pinching compression installation tool of claim 1, wherein, The clamping seat (1) is internally provided with a transmission cavity (11) for assembling the variable-diameter adjusting assembly (4) and the transmission assembly (5), and the transmission cavity (11) is closed by a cover plate (12) covering the clamping seat (1).

8. The variable diameter power pinching compression installation tool of claim 1, wherein, The manual clamping assembly (3) is provided with an indication scale (13).

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