Drawer

Abstract

The invention discloses a puller, belongs to the technical field of power equipment maintenance tools, and mainly aims to realize convenient and stable disassembly of an elbow-type cable joint. According to the main technical scheme, the puller is used for disassembling the elbow-shaped cable connector in a metal cabinet body of power equipment and comprises a fixing part, a clamping part and a driving part; the fixing part is used for being detachably fixed on a frame of the electrical equipment metal cabinet body; the thickness of the holding and clamping part is smaller than a gap between two adjacent elbow-type cable joints, the holding and clamping part is provided with a clamping opening with an adjustable opening degree, and the clamping opening is used for holding the elbow-type cable joints; the driving part is arranged on the fixing part, the power output end of the driving part is connected with the holding and clamping part, and the driving part is used for driving the holding and clamping part to linearly move in the direction away from the electrical equipment metal cabinet body so as to pull the elbow-type cable connector.

Description

Technical Field

[0001] This application belongs to the technical field of power equipment maintenance tools, specifically relating to a puller. Background Technology

[0002] Inside the metal cabinet of power equipment, the gap between two adjacent elbow-type cable joints is extremely small, making the disassembly of elbow-type cable joints quite difficult. Summary of the Invention

[0003] In view of this, this application provides a puller, the main purpose of which is to achieve convenient and stable disassembly of elbow-type cable joints.

[0004] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides a puller for disassembling elbow-type cable joints inside a metal cabinet of power equipment, comprising: A fixing part, which is used to detachably fix to the frame of the metal cabinet of the power equipment; The clamping part has a thickness less than the gap between two adjacent elbow-type cable joints, and the clamping part has an adjustable opening for holding the elbow-type cable joint. A drive unit is disposed on the fixed part, and the power output end of the drive unit is connected to the clamping part. The drive unit is used to drive the clamping part to move linearly in a direction away from the metal cabinet of the power equipment in order to pull out the elbow-type cable connector.

[0005] Optionally, the clamping part includes a guide block and two symmetrically arranged clamping bodies; the guide block has two sliding grooves, which are symmetrically distributed with respect to the two clamping bodies and are both inclined grooves, extending in a tapering manner along the direction close to the elbow-shaped cable joint; the two clamping bodies are arranged one-to-one with the two sliding grooves, and each clamping body is provided with a sliding member adapted to the corresponding sliding groove, the sliding member being used to embed into the sliding groove and form a sliding fit; the power output end of the driving unit is connected to the guide block, and when the driving unit drives the guide block to move away from the elbow-shaped cable joint, the sliding groove applies a lateral force through the sliding member, causing the two clamping bodies to move synchronously towards each other along the symmetrical plane.

[0006] Optionally, the guide block is trapezoidal or triangular, the tapering direction of the guide block is consistent with the orientation of the elbow-type cable connector, and the two grooves are inclined along the tapering direction of the guide block.

[0007] Optionally, the clamp body has a holding groove at one end away from the guide block, the holding groove being used to engage the elbow bend of the elbow-type cable connector.

[0008] Optionally, the bottom of the holding groove extends downward to form a straight edge extension limiting section, which is used to fit against the straight outer wall of the elbow bend of the elbow-shaped cable joint to limit the elbow-shaped cable joint in the direction of the guide block toward the clamping part.

[0009] Optionally, the driving part includes a transmission rod and a transmission sleeve; the fixing part has at least three through holes, each of which is used for the transmission rod to pass through; the outer diameter of the transmission sleeve is larger than the inner diameter of the through hole, the transmission sleeve is sleeved on one end of the transmission rod and threadedly connected to the transmission rod, and the other end of the transmission rod is connected to the clamping part.

[0010] Optionally, the drive unit further includes a gasket, which is sleeved on the transmission rod and sandwiched between the transmission sleeve and the fixing part.

[0011] Optionally, the transmission sleeve has an external hexagonal structure, and the end of the transmission sleeve is provided with an internal square recess.

[0012] Optionally, the fixing part has a built-in magnetic adsorption element, which is used to magnetically fix the fixing part to the frame of the metal cabinet of the power equipment where the elbow-type cable joint is located.

[0013] Optionally, the fixing part includes a bracket and a support leg; the bracket is a frame structure; the support leg is fixedly connected to the bracket and is used to fit against the surface of the metal cabinet frame of the power equipment; the magnetic adsorption element is embedded on the side of the bracket and the support leg facing the metal cabinet frame of the power equipment.

[0014] By employing the above technical solution, this application has at least the following beneficial effects: The puller provided in this application provides a stable and reliable support base for the entire pull operation by detachably fixing the fixing part to the frame of the metal cabinet of the power equipment. The clamping part, which is thinner than the gap between two adjacent elbow cable joints, can accurately hold the target elbow cable joint with the adjustable clamping opening, effectively solving the problem of difficulty in clamping due to the extremely small gap between adjacent joints. The driving part set on the fixing part drives the clamping part to move linearly away from the metal cabinet of the power equipment, which can apply a smooth and controllable pulling force to the held elbow cable joint, realizing convenient and efficient disassembly of elbow cable joints in the metal cabinet of the power equipment, and greatly reducing the difficulty of disassembling elbow cable joints under narrow gap conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a puller according to an optional embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the puller from another perspective; Figure 3 This is a schematic diagram of the structure of the clamp in one optional embodiment of this application.

[0016] The reference numerals in the attached figures are as follows: 1. Fixing part; 11. Bracket; 111. Through hole; 12. Support leg; 2. Clamping part; 21. Guide block; 211. Slide groove; 22. Clamping body; 221. Holding groove; 222. Straight edge extension limiting section; 3. Driving part; 31. Transmission rod; 32. Transmission sleeve; 33. Gasket. Detailed Implementation

[0017] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, 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. Therefore, they should not be construed as limitations on this application.

[0018] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0021] See also Figures 1 to 3As shown in the embodiment of this application, a puller is provided for disassembling elbow cable joints inside a metal cabinet of power equipment. The puller includes a fixing part 1, a clamping part 2, and a driving part 3. The fixing part 1 is detachably fixed to the frame of the metal cabinet of the power equipment. The thickness of the clamping part 2 is less than the gap between two adjacent elbow cable joints. The clamping part 2 has an adjustable opening for holding the elbow cable joint. The driving part 3 is disposed on the fixing part 1, and its power output end is connected to the clamping part 2. The driving part 3 drives the clamping part 2 to move linearly away from the metal cabinet of the power equipment to pull out the elbow cable joint.

[0022] The puller provided in this embodiment provides a stable and reliable support base for the entire pull operation by detachably fixing the fixing part 1 to the frame of the metal cabinet of the power equipment. The clamping part 2, which is thinner than the gap between two adjacent elbow cable joints, can accurately hold the target elbow cable joint with the adjustable clamping opening, effectively solving the problem of difficulty in clamping due to the extremely small gap between adjacent joints. The driving part 3 set on the fixing part 1 drives the clamping part 2 to move linearly away from the metal cabinet of the power equipment, which can apply a stable and controllable pulling force to the held elbow cable joint, realizing convenient and efficient disassembly of the elbow cable joint inside the metal cabinet of the power equipment, and greatly reducing the difficulty of disassembling the elbow cable joint under narrow gap conditions.

[0023] When using this puller to disassemble elbow cable joints inside the metal cabinet of power equipment, the metal cabinet can refer to the metal cabinet of equipment such as switchgear, ring main unit, or cable branch box. The specific operating steps for disassembling elbow cable joints are as follows: First, install and fix the fixing part 1 of the puller to the frame of the target power equipment metal cabinet using a detachable connection, ensuring that the fixing part 1 is firmly connected to the cabinet without loosening; then, taking advantage of the fact that the thickness of the clamping part 2 is smaller than the gap between adjacent elbow cable joints, insert the clamping part 2 into the narrow space between the joint to be disassembled and the adjacent joint, and adjust the clamping opening of the clamping part 2 so that the clamping opening accurately holds the elbow cable joint to be disassembled; finally, operate the drive part 3 so that the power output end of the drive part 3 drives the clamping part 2 to move linearly away from the power equipment metal cabinet, and complete the pulling and disassembly of the elbow cable joint through continuous and stable pulling force.

[0024] The fixing part 1 can adopt a frame structure, which has good structural stability and load-bearing capacity, and can adapt to the stress requirements during the pulling operation. The fixing part 1 is specifically set on the side of the elbow-type cable joint away from the metal cabinet of the power equipment. In actual installation, the frame-type fixing part 1 can be firmly assembled to the frame of the target power equipment metal cabinet through detachable connection methods such as bolt connection and snap connection, ensuring that the fixing part 1 is firmly connected to the cabinet without loosening, thereby providing a reliable support foundation for the entire subsequent pulling operation.

[0025] The clamping part 2 can adopt a symmetrical opening and closing sleeve structure, which is located on the side of the fixing part 1 near the elbow-shaped cable joint. Because the thickness of its sleeve body is less than the gap between two adjacent elbow-shaped cable joints, it can smoothly extend into the narrow gap between the joint to be disassembled and the adjacent joint and accurately approach the elbow-shaped cable joint to be disassembled. Simultaneously, with the adjustable opening of the symmetrical opening and closing sleeve, the opening is first adjusted to be larger than the outer diameter of the joint to be disassembled, so that the joint can be smoothly fitted. Then, the opening is further adjusted to reduce the size, so that the inner wall of the opening fits tightly against the outer circumference of the elbow-shaped cable joint to be disassembled. Through the symmetrical opening and closing structure, the sleeve can apply a uniform clamping force to the joint, thereby achieving a stable grip on the elbow-shaped cable joint, providing a reliable clamping guarantee for the subsequent drive part 3 to drive the clamping part 2 to move and complete the joint pull-out.

[0026] The drive unit 3 can adopt various structures to adapt to linear drive requirements, such as a screw and nut drive structure, a hydraulic drive structure, a pneumatic drive structure, or a gear and rack drive structure. In practical applications, the drive unit 3 is mounted on the frame of the fixed unit 1, and its power output end is coaxially aligned and firmly connected with the clamping unit 2. Based on this, it can ensure that the drive unit 3 itself is installed stably to avoid displacement during operation, and also ensure that the power output by the drive unit 3 is accurately transmitted to the clamping unit 2. The clamping unit 2 is driven to move smoothly and linearly away from the metal cabinet of the power equipment, thereby reliably completing the pulling and disassembling operation of the elbow-type cable joint.

[0027] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2As shown, the clamping part 2 includes a guide block 21 and two symmetrically arranged clamping bodies 22. The guide block 21 has two sliding grooves 211, which are symmetrically distributed with respect to the two clamping bodies 22 and are both inclined grooves that gradually narrow along the direction close to the elbow-shaped cable joint. The two clamping bodies 22 are arranged one-to-one with the two sliding grooves 211. Each clamping body 22 is provided with a sliding member that is adapted to the corresponding sliding groove 211. The sliding member is used to embed into the sliding groove 211 and form a sliding fit. The power output end of the drive part 3 is connected to the guide block 21. When the drive part 3 drives the guide block 21 to move away from the elbow-shaped cable joint, the sliding groove 211 applies a lateral force through the sliding member, causing the two clamping bodies 22 to move synchronously towards each other along the symmetrical plane.

[0028] In this embodiment, the clamping part 2 forms a sliding engagement with the sliding member on the clamp body 22 through the tapered inclined groove on the guide block 21. When the driving part 3 drives the guide block 21 to move away from the elbow cable joint, the groove 211 will apply a lateral force to the sliding member, thereby driving the two symmetrically arranged clamp bodies 22 to move synchronously towards each other along the plane of symmetry. This structure not only realizes the automatic adjustment of the clamp opening by the linkage between the guide block 21 and the clamp body 22 to ensure accurate clamping of the elbow cable joint, but also makes the clamping force more uniform by relying on the symmetrical clamp body 22 structure, avoiding the elbow cable joint from shifting or being damaged during the pulling process. At the same time, combined with the power transmission of the driving part 3, the clamping and pulling actions are connected smoothly, further improving the stability and convenience of disassembling the elbow cable joint in narrow gaps.

[0029] The guide block 21 is roughly plate-shaped, with two through grooves 211 on its surface. The two grooves 211 are mirror-symmetrical about the plane of symmetry of the two clamps 22, and both are gradually narrowing inclined grooves. The distance between the two grooves 211 gradually decreases along the direction close to the elbow-type cable joint. Specifically, the distance between the two grooves 211 is the smallest at the end close to the elbow-type cable joint, and the distance between the two grooves 211 is the largest at the end far from the elbow-type cable joint.

[0030] The clamp 22 can adopt an arc-shaped clamp structure, with its inner arc surface facing the elbow-type cable connector adapting to the outer circumferential surface of the elbow-type cable connector to be clamped, thereby improving the clamping fit and stability. During actual installation, a sliding component is fixedly mounted on the inner arc surface of each clamp 22 at the end away from the elbow-type cable connector. This sliding component is arranged along an axis perpendicular to the moving direction of the clamp 22, with its two ends respectively embedded in corresponding through-groove sliding grooves 211 on the guide block 21 plate, forming a sliding fit. Based on the above assembly relationship, the sliding component can slide freely along the oblique extension direction of the sliding groove 211, while restricting the clamp 22 to move only towards or away from each other along the symmetrical plane of the two clamps 22, ensuring precise and controllable linkage between the clamp 22 and the guide block 21. It is understandable that the plane of symmetry between the two clamping bodies 22 is an imaginary plane: it bisects the initial distance between the two clamping bodies 22 and is perpendicular to the clamping direction of the clamping bodies 22; all movements of the two clamping bodies 22 are symmetrically referenced to this plane, avoiding unilateral offset. Thus, synchronous symmetrical movement of the clamping bodies 22 can be achieved: the starting time of the movement of the two clamping bodies 22 is consistent, their speeds are the same, and their displacement distances are equal, preventing situations where one side moves first, one side moves later, or there is uneven displacement, thereby ensuring that the clamping jaws are always directly facing the elbow-type cable joint, avoiding uneven force on the joint during clamping. In practical applications, when the guide block 21 moves away from the joint, the two clamping bodies 22 move closer together, and the clamping jaws contract and close to hold the elbow-type cable joint; when the guide block 21 moves in the opposite direction, the two clamping bodies 22 separate in opposite directions, and the clamping jaws open to release the elbow-type cable joint.

[0031] The sliding component can be a pin or a slider. In practical applications, a needle roller bearing is fitted on the part of the sliding component embedded in the groove 211. Through the rolling friction characteristics of the needle roller bearing, the frictional resistance between the sliding component and the inner wall of the groove 211 is reduced, thereby improving the smoothness and responsiveness of the linkage action between the guide block 21 and the clamp 22.

[0032] In the above embodiments, see Figure 1 and Figure 2 As shown, the guide block 21 is trapezoidal or triangular, and the tapering direction of the guide block 21 is consistent with the orientation of the elbow-type cable connector. The two slides 211 are inclined along the tapering direction of the guide block 21.

[0033] It should be noted that by setting the guide block 21 as a trapezoid or triangle and its tapering direction is consistent with the orientation of the elbow-type cable connector, and by setting the two slides 211 at an angle along the tapering direction of the guide block 21, the guide block 21 can effectively prevent the movement of the two clamps 22 from being blocked, ensuring that the two clamps 22 can move smoothly and synchronously towards each other along the plane of symmetry, ensuring that the clamps can retract and close smoothly to firmly hold the elbow-type cable connector, and further improving the smoothness and reliability of the clamping part 2 in the narrow gap.

[0034] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 3 As shown, the clamp 22 has a holding groove 221 at one end away from the guide block 21. The holding groove 221 is used to engage the elbow section of the elbow-type cable joint.

[0035] In this embodiment, the clamping groove 221 provided at the end of the clamp 22 away from the guide block 21 can engage the elbow section of the elbow-type cable joint, so that the clamping part 2 and the elbow-type cable joint form a clamping fit with higher fit and stronger stability, effectively preventing the elbow-type cable joint from slipping or shifting during the pulling process, ensuring that the pulling force can be accurately and stably transmitted to the elbow-type cable joint, further improving the reliability and safety of the elbow-type cable joint disassembly operation under narrow gap conditions, and adapting to the elbow section structure characteristics of the elbow-type cable joint, enhancing the adaptability of the clamping part 2 to the elbow-type cable joint.

[0036] The holding groove 221 is located on the inner arc surface of the clamping body 22 at the end away from the guide block 21. Its structure is V-shaped or angled, and the angle of the V-shaped holding groove 221 matches the bending angle of the elbow section of the elbow-shaped cable joint, allowing it to fit snugly against the elbow section contour. When the driving unit 3 drives the guide block 21 to move, causing the two symmetrically arranged clamping bodies 22 to close towards each other, the holding groove 221 at the end of the clamping body 22 can wrap around and engage with the elbow section of the elbow-shaped cable joint. This engaging fit forms a reliable limiting structure, which, compared to a simple arc-surface fitting clamping method, effectively limits the axial and circumferential displacement of the elbow-shaped cable joint along the clamping body 22 during the pulling process, preventing the elbow-shaped cable joint from slipping off the clamping body 22 during the pulling process.

[0037] In the above embodiment, as shown in Figure 3, the bottom of the holding groove 221 extends downward to form a straight edge extension limiting section 222. The straight edge extension limiting section 222 is used to fit the straight outer wall of the elbow section of the elbow-shaped cable joint to limit the elbow-shaped cable joint in the direction of the guide block 21 toward the clamping part 2, so as to prevent the elbow-shaped cable joint from slipping off the clamping body 22 during the pulling process.

[0038] It should be noted that the straight-edge extension limiting section 222 formed by the downward extension of the bottom of the holding groove 221 can fit against the straight outer wall of the elbow section of the elbow-shaped cable joint. It can limit the elbow-shaped cable joint in the direction of the guide block 21 toward the clamping part 2, effectively preventing the elbow-shaped cable joint from slipping off the clamp 22 during the pulling process. This further improves the stability and reliability of the clamping part 2 in holding the elbow-shaped cable joint, ensures accurate and stable transmission of pulling force, and enhances the safety and smoothness of the elbow-shaped cable joint disassembly operation under narrow gap conditions.

[0039] The clamping groove 221 is a recess on the clamping body 22 used to engage the elbow bend of the elbow-type cable joint, while the straight edge extension limiting section 222 is a straight structure extending downward from the bottom of the clamping groove 221 toward the straight section of the cable joint. When the clamping part 2 holds the elbow-type cable joint, the clamping groove 221 first engages the elbow bend of the elbow-type cable joint; the straight edge extension limiting section 222 will fit against the outer wall of the straight section below the elbow bend of the joint; thus, when the driving part 3 pulls the clamping part 2, if the elbow-type cable joint wants to slide toward the guide block 21 toward the clamping part 2, the straight edge extension limiting section 222 will block the straight section of the joint, thereby limiting the displacement of the joint and preventing the joint from slipping out of the clamping body 22. It should be noted that the shape of the straight edge extension limiting section 222 matches the contour of the outer wall of the straight section below the elbow bend of the elbow-type cable joint. In this embodiment, the shape of the straight edge extension limiting segment 222 is an arc shape that matches the diameter of the straight segment and fits the outer wall of the straight segment of the elbow-type cable connector.

[0040] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the driving part 3 includes a transmission rod 31 and a transmission sleeve 32; the fixing part 1 has at least three through holes 111, each of which is used for the transmission rod 31 to pass through; the outer diameter of the transmission sleeve 32 is larger than the inner diameter of the through hole 111, the transmission sleeve 32 is sleeved on one end of the transmission rod 31 and threadedly connected to the transmission rod 31, and the other end of the transmission rod 31 is connected to the clamping part 2; when the transmission sleeve 32 is rotated, the transmission sleeve 32 abuts against the end face of the fixing part 1 and forms a stop, and the transmission rod 31 is driven by the threaded transmission to drive the clamping part 2 to move linearly away from the metal cabinet of the power equipment.

[0041] In this embodiment, by providing at least three through holes 111 for the transmission rod 31 to pass through, the transmission rod 31 can flexibly select the through hole 111 to assemble according to the actual position of the elbow-type cable joint to be disassembled, thereby improving the adaptability of the puller to elbow-type cable joints with different spacings and positions. At the same time, the structure in which the outer diameter of the transmission sleeve 32 is larger than the inner diameter of the through hole 111 and is threadedly connected to the transmission rod 31 can not only provide reliable support for the rotation of the transmission rod 31 through the abutment between the transmission sleeve 32 and the fixed part 1, but also enable the transmission rod 31 to drive the clamping part 2 to move smoothly through the threaded transmission, thereby applying a controllable pulling force to the elbow-type cable joint and ensuring the stability and convenience of disassembly operations in narrow gaps.

[0042] The fixing part 1 has at least three through holes 111, which are linearly distributed along the arrangement direction of the elbow-type cable joints inside the metal cabinet of the power equipment. The axis of each through hole 111 is parallel to the moving direction of the clamping part 2 to adapt to the pulling requirements of elbow-type cable joints at different positions. In this embodiment, the fixing part 1 specifically has three through holes 111, which are linearly distributed at equal intervals along the arrangement direction of the elbow-type cable joints. The spacing between two adjacent through holes 111 is adapted to the spacing between two adjacent elbow-type cable joints. The operator can select the corresponding through hole 111 to pass the transmission rod 31 according to the specific position of the elbow-type cable joint to be disassembled, and can achieve precise pulling of elbow-type cable joints at different positions without adjusting the overall installation position of the fixing part 1.

[0043] In this configuration, one of the transmission rods 31 is inserted into any of the through holes 111 of the fixed part 1. The end of the transmission rod 31 away from the transmission sleeve 32 is fixedly connected to the guide block 21 of the clamping part 2 to ensure that the axial linear movement of the transmission rod 31 can be synchronously transmitted to the guide block 21, driving the guide block 21 to drive the two clamps 22 to complete the clamping and pulling action.

[0044] The transmission sleeve 32 is located on the side of the fixed part 1 away from the clamping part 2. The transmission sleeve 32 is sleeved on the end of the transmission rod 31 away from the guide block 21 and is threadedly connected to the transmission rod 31. The outer diameter of the transmission sleeve 32 is larger than the inner diameter of the through hole 111. Based on this, when the transmission sleeve 32 is rotated, the end face of the transmission sleeve 32 near the fixed part 1 abuts against the surface of the fixed part 1 and forms a stop, preventing the transmission sleeve 32 from passing through the through hole 111 along with the transmission rod 31. At this time, continuous rotation of the transmission sleeve 32 will apply an axial force to the transmission rod 31 through the threaded engagement, pushing the transmission rod 31 to move linearly in the direction away from the metal cabinet of the power equipment. The end of the transmission rod 31 away from the transmission sleeve 32 is connected to the guide block 21 of the clamping part 2, thereby driving the guide block 21 and the two clamps 22 to move linearly synchronously. Through the stable grip of the elbow-type cable joint by the clamping part 2, a smooth and controllable pulling force is applied to complete the disassembly operation of the joint. In this embodiment, the helix angle of the thread can achieve efficient conversion from rotary motion to linear motion. At the same time, the thread drive has a self-locking characteristic, which can lock the position of the clamping part 2 at any position, preventing the clamping part 2 from retracting due to force rebound during the pulling process, and ensuring the stable and continuous application of the pulling force.

[0045] It should be noted that when it is necessary to change the through hole 111 through which the transmission rod 31 passes according to the position of the elbow-type cable connector to be disassembled, the operator only needs to unscrew the transmission sleeve 32 sleeved on the end of the transmission rod 31 away from the guide block 21 to release the axial limiting constraint of the transmission sleeve 32 on the transmission rod 31. Then, the transmission rod 31 is pulled out from the currently inserted through hole 111 and re-inserted into another through hole 111 that matches the position of the elbow-type cable connector to be disassembled. Then, the transmission sleeve 32 is screwed back onto the corresponding end of the transmission rod 31 to complete the replacement and adjustment of the transmission rod 31. The entire operation process does not require disassembling the fixing part 1 and the clamping part 2, which greatly simplifies the pre-adjustment process of the joint pulling operation at different positions and further improves the ease of operation and working condition adaptability of this puller.

[0046] In this embodiment, the clamping action of the clamping part 2 on the elbow-type cable joint can be achieved by manual operation. Specifically, the operator can directly hold the two clamps 22 and apply opposing forces, causing the two clamps 22 to move synchronously towards each other along the sliding groove 211 on the guide block 21. This causes the clamping groove 221 at the end of the clamp 22 to fit and engage with the elbow bend of the elbow-type cable joint. Combined with the limiting effect of the straight edge extension limiting section 222 on the straight section of the joint, the elbow-type cable joint is securely held. After the clamp is in place, the drive part 3 is operated to perform the pulling operation. The manual holding method can flexibly adapt to elbow-type cable joints with different outer diameters, further improving the operational flexibility and adaptability of the device.

[0047] Furthermore, the operation of rotating the transmission sleeve 32 to drive the transmission rod 31 to move axially must be carried out on the premise that the clamping part 2 has firmly held the elbow-type cable connector. At this time, the clamping part 2, through the clamping groove 221, the straight edge extension limiting section 222, and the elbow-type cable connector forming a locking and limiting structure, can drive the elbow-type cable connector to apply circumferential limiting constraint to the transmission rod 31, so that the transmission rod 31 can only move linearly along its own axis and cannot rotate circumferentially with the rotation of the transmission sleeve 32. This ensures that the force of the thread transmission is completely converted into axial pulling force, avoids relative slippage between the clamping part 2 and the elbow-type cable connector caused by the rotation of the transmission rod 31, and ensures the stability and reliability of the pulling operation.

[0048] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, see Figure 1 and Figure 2 As shown, the drive unit 3 also includes a gasket 33, which is sleeved on the transmission rod 31 and sandwiched between the transmission sleeve 32 and the fixing part 1.

[0049] In this embodiment, by setting a shim 33, the contact area between the transmission sleeve 32 and the fixed part 1 can be increased, reducing the pressure on the end face of the fixed part 1 when the transmission sleeve 32 rotates, and preventing the end face of the fixed part 1 from being damaged due to excessive local force; at the same time, it can improve the stability of the contact between the transmission sleeve 32 and the fixed part 1, prevent the transmission sleeve 32 from deviating during rotation and stopping, and ensure that the force of the thread transmission can be accurately and stably converted into the axial driving force of the transmission rod 31, thereby ensuring that the transmission rod 31 drives the clamping part 2 to move smoothly in a straight line, so that the pulling force is continuously and controllably applied to the elbow-type cable joint, improving the stability and reliability of disassembly operations in narrow gaps.

[0050] The gasket 33 includes a sleeve section and a gasket 33 body. The sleeve section is sleeved on the transmission rod 31 and is used to axially guide the gasket 33 as a whole, ensuring that the gasket 33 body is always parallel to the end face of the fixing part 1. The gasket 33 body is disc-shaped, and its outer diameter is larger than the inner diameter of the through hole 111 on the fixing part 1, and it is sandwiched between the transmission sleeve 32 and the fixing part 1.

[0051] Specifically, the sleeve section and the gasket 33 body are coaxially connected. In this embodiment, the sleeve section and the gasket 33 body are an integral structure. The inner diameter of the sleeve section is adapted to the outer diameter of the transmission rod 31. After being sleeved on the transmission rod 31, it can restrict the gasket 33 body to move only along the axial direction of the transmission rod 31, preventing the gasket 33 from radially shifting or tilting during the rotation of the transmission sleeve 32. This ensures that the gasket 33 body and the end face of the fixing part 1 and the end face of the transmission sleeve 32 always remain in contact, ensuring uniform force transmission. The outer diameter of the gasket 33 body is larger than the inner diameter of the through hole 111 of the fixing part 1, and larger than the area of ​​the contact end face between the transmission sleeve 32 and the fixing part 1. When sandwiched between the two, it can greatly increase the contact area between the transmission sleeve 32 and the fixing part 1, and disperse the concentrated axial pressure applied by the transmission sleeve 32 into a uniform surface pressure, so as to avoid the end face of the fixing part 1 from being indented or deformed due to excessive local force. At the same time, the gasket 33 body can buffer the impact force when the transmission sleeve 32 rotates, reduce the friction loss of the contact surface between the two, and improve the transmission stability.

[0052] In the above embodiments, see Figure 1 and Figure 2 As shown, the transmission sleeve 32 has an external hexagonal structure, and the end of the transmission sleeve 32 is provided with an internal square recess.

[0053] It should be noted that the external hexagonal structure can apply torque to rotate the transmission sleeve 32 through the external hexagonal sleeve, while the internal square recess can apply torque to rotate the transmission sleeve 32 through the internal square connector. The two structures support torque input from manual tools and power tools respectively, and can adapt to different matching tool conditions. This improves the ease of operation and force stability when rotating the transmission sleeve 32, and ensures that the transmission rod 31 can be smoothly driven to move the clamping part 2 through the threaded transmission, thus ensuring the efficient pulling and disassembly of the elbow-type cable joint.

[0054] In some possible embodiments disclosed in this application, the fixing part 1 has a built-in magnetic adsorption element, which is used to magnetically fix the fixing part 1 to the frame of the metal cabinet of the power equipment where the elbow-type cable joint is located.

[0055] In this embodiment, by incorporating a magnetic adsorption element within the fixing part 1, the fixing part 1 can be quickly and magnetically fixed to the frame of the metal cabinet of the power equipment where the elbow-type cable connector is located. The assembly and fixing of the fixing part 1 can be completed without the need for additional connecting parts such as bolts or clips, simplifying the installation process of the fixing part 1 and improving the installation efficiency of the fixing part 1. At the same time, the magnetic fixing method can achieve a stable connection between the fixing part 1 and the frame of the metal cabinet, providing a reliable support foundation for subsequent pulling operations. Furthermore, the detachable nature of the magnetic fixing facilitates the rapid adjustment and transfer of the fixing part 1 in different positions, further improving the ease of operation and flexibility of the puller in adapting to different working conditions.

[0056] The magnetic adsorption element can be a high-power permanent magnet, specifically a permanent magnet material with high magnetic energy product, such as neodymium iron boron permanent magnet, ferrite permanent magnet or samarium cobalt permanent magnet. The high-power permanent magnet can provide stable and sufficient adsorption force to ensure that the fixing part 1 and the frame of the metal cabinet of the power equipment form a firm magnetic connection. At the same time, it has good anti-demagnetization performance and can be adapted to the working environment of the power equipment site.

[0057] In the above embodiments, see Figure 1 and Figure 2 As shown, the fixing part 1 includes a bracket 11 and a support leg 12; the bracket 11 has a frame structure; the support leg 12 is fixedly connected to the bracket 11 and is used to fit against the surface of the metal cabinet frame of the power equipment; magnetic adsorption elements are embedded on the side of the bracket 11 and the support leg 12 facing the metal cabinet frame of the power equipment.

[0058] It should be noted that the fixing part 1 adopts a frame-type bracket 11 combined with a support leg 12 fixedly connected to the bracket 11. The support leg 12 can fit against the surface of the metal cabinet frame of the power equipment. At the same time, magnetic adsorption elements are embedded on the side of the bracket 11 and the support leg 12 facing the metal cabinet frame of the power equipment. This not only improves the stability of the fixing part 1 fitting against the cabinet frame through the synergistic cooperation of the bracket 11 and the support leg 12, but also enhances the firmness of the magnetic fixation and provides a reliable support foundation for the pulling operation. It also enables the support leg 12 to provide a hand-holding function, improving the convenience and safety of the operation process. The embedded magnetic adsorption elements can avoid damage from external impacts during use, extend the service life of the magnetic adsorption elements and the entire fixing part 1, and thus extend the overall life of the puller. At the same time, the magnetic fixation method does not require additional connecting parts, simplifying the installation process, improving installation efficiency, and facilitating the quick adjustment and transfer of the fixing part 1, thereby improving the flexibility of the puller in adapting to different working conditions.

[0059] The support frame 11 can adopt a portal frame structure, which consists of a horizontal beam and two vertical beams integrally formed or fixedly connected. The horizontal beam is the main load-bearing component of the support frame 11 and extends horizontally; the two vertical beams are respectively vertically connected to the two ends of the horizontal beam and extend along the direction close to the metal cabinet of the power equipment, so that the entire portal frame 11 forms a stable load-bearing frame with good structural stability and load-bearing capacity. It can effectively adapt to the axial tensile force transmitted by the transmission rod 31 during the pulling operation and prevent the support frame 11 from deforming or shifting.

[0060] Specifically, the through hole 111 on the bracket 11 is opened on the horizontal beam of the portal bracket 11.

[0061] Among them, the support leg 12 is fixedly connected to the end of the longitudinal upright beam of the portal frame 11 away from the transverse crossbeam.

[0062] Specifically, the support leg 12 has a plate-like or block-like structure, and the side facing the metal cabinet frame of the power equipment is a flat and fitting surface. This fitting surface is adapted to the surface of the metal cabinet frame of the power equipment, ensuring that the support leg 12 can fit tightly against the surface of the cabinet frame and improving the stability of the connection between the fixing part 1 and the cabinet.

[0063] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0064] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A puller, characterized in that, Elbow-type cable joints for disassembling metal cabinets of power equipment include: A fixing part, which is used to detachably fix to the frame of the metal cabinet of the power equipment; The clamping part has a thickness less than the gap between two adjacent elbow-type cable joints, and the clamping part has an adjustable opening for holding the elbow-type cable joint. A drive unit is disposed on the fixed part, and the power output end of the drive unit is connected to the clamping part. The drive unit is used to drive the clamping part to move linearly in a direction away from the metal cabinet of the power equipment in order to pull out the elbow-type cable connector.

2. The puller according to claim 1, characterized in that, The clamping part includes a guide block and two symmetrically arranged clamping bodies. The guide block has two sliding grooves, which are symmetrically distributed around the two clamping bodies and are both inclined grooves, extending in a tapering manner towards the elbow-shaped cable connector. The two clamping bodies are arranged one-to-one with the two sliding grooves. Each clamping body has a sliding element adapted to the corresponding sliding groove, which is used to embed into the groove and form a sliding fit. The power output end of the drive unit is connected to the guide block. When the drive unit drives the guide block to move away from the elbow-shaped cable connector, the sliding groove applies a lateral force through the sliding element, causing the two clamping bodies to move synchronously towards each other along the symmetrical plane.

3. The puller according to claim 2, characterized in that, The guide block is trapezoidal or triangular, and the tapering direction of the guide block is consistent with the orientation of the elbow-type cable connector. The two grooves are inclined along the tapering direction of the guide block.

4. The puller according to claim 2, characterized in that, The clamp body is provided with a holding groove at one end away from the guide block, and the holding groove is used to engage the elbow section of the elbow-type cable connector.

5. The puller according to claim 4, characterized in that, The bottom of the holding groove extends downward to form a straight edge extension limiting section, which is used to fit the straight outer wall of the elbow bend of the elbow-shaped cable joint to limit the elbow-shaped cable joint in the direction of the guide block toward the clamping part.

6. The puller according to claim 1, characterized in that, The driving part includes a transmission rod and a transmission sleeve; the fixing part has at least three through holes, each of which is used for the transmission rod to pass through; the outer diameter of the transmission sleeve is larger than the inner diameter of the through hole, the transmission sleeve is sleeved on one end of the transmission rod and threadedly connected to the transmission rod, and the other end of the transmission rod is connected to the clamping part.

7. The puller according to claim 6, characterized in that, The drive unit also includes a gasket, which is sleeved on the transmission rod and sandwiched between the transmission sleeve and the fixing part.

8. The puller according to claim 6, characterized in that, The transmission sleeve has an external hexagonal structure, and the end of the transmission sleeve is provided with an internal square recess.

9. The puller according to claim 1, characterized in that, The fixing part has a built-in magnetic adsorption element, which is used to magnetically fix the fixing part to the frame of the metal cabinet of the power equipment where the elbow-type cable joint is located.

10. The puller according to claim 9, characterized in that, The fixing part includes a bracket and a support leg; the bracket is a frame structure; the support leg is fixedly connected to the bracket and is used to fit against the surface of the metal cabinet frame of the power equipment; the magnetic adsorption element is embedded on the side of the bracket and the support leg facing the metal cabinet frame of the power equipment.

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