Automatic ejection sleeve special for power line clamp

Abstract

The utility model discloses a special automatic ejection sleeve for a power line clamp, which is characterized in that one end of an inner hexagonal head is connected with an electric wrench, the other end of the inner hexagonal head is connected with a hexagon bolt, the outer side of the inner hexagonal head is provided with an external thread matched with an internal thread sliding block, the internal thread sliding block is meshed with the outer side of the inner hexagonal head, and two sides of the internal thread sliding block are provided with bulges; the protrusion is matched with a sliding groove formed in the inner side face of the outer circle shell, so that the sliding block can slide in the outer circle shell along the sliding groove, the ejector rod is arranged on one side of the hexagon bolt connecting end of the inner hexagon head, the tension spring shaft penetrates through the ejector rod and the center of the inner hexagon head, rolling bearings are installed at the two ends of the tension spring shaft, and a hook at one end of the ejector rod tension spring penetrates through the middle of the tension spring shaft. The other end of the ejector rod tension spring penetrates through the middle of a pin shaft, and the pin shaft is placed in a groove in the end, connected with the electric wrench, of the inner hexagon head 1. According to the utility model, the broken bolt of the wire clamp can be automatically ejected.

Description

Technical Field

[0001] The utility model relates to the field of electric power construction, and particularly relates to a special automatic ejection sleeve for electric wire clamps. Background Art

[0002] The bolt of the wire clamp is a torque-disconnecting bolt. When the torque reaches the set value, one end of the bolt breaks off and remains inside the sleeve. Due to metal deformation, the broken-off bolt is tightly stuck inside the sleeve and is very difficult to remove. At this time, the operator has to replace the sleeve or remove the sleeve from the wrench and use another tool to strike the part of the bolt stuck inside the sleeve. Since the electric power workers are working at high altitudes on poles, such operations have great safety hazards and low efficiency. There is an urgent need to develop a safe and highly efficient automatic ejection sleeve. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a special automatic ejection sleeve for electric wire clamps, which can be used for the locking of special wire clamps such as electric power piercing wire clamps and parallel groove clamps, and can be installed on an ordinary electric wrench for use. By using the clockwise and counterclockwise rotation of the electric wrench, the function of automatically ejecting the broken bolt of the wire clamp can be achieved.

[0004] One technical solution to achieve the above purpose is: a special automatic ejection sleeve for electric wire clamps, including an outer circular housing and an inner hexagonal head arranged inside the outer circular housing, and further including an internally threaded slider, a ejector rod, a ejector rod tension spring, a tension spring shaft and a pin shaft.

[0005] One end of the inner hexagonal head is connected to the electric wrench, and the other end is connected to the hexagonal bolt. The outer side of the inner hexagonal head is provided with an external thread that cooperates with the internally threaded slider. The internally threaded slider meshes with the outer side of the inner hexagonal head. The two sides of the internally threaded slider are provided with protrusions, and the protrusions cooperate with the chutes arranged on the inner side surface of the outer circular housing, so that the slider can slide along the chute inside the outer circular housing. The ejector rod is arranged on one side of the hexagonal bolt connection end of the inner hexagonal head. The tension spring shaft passes through the centers of the ejector rod and the inner hexagonal head, and rolling bearings are installed at both ends of the tension spring shaft. The hook at one end of the ejector rod tension spring passes through the middle of the tension spring shaft, and the other end of the ejector rod tension spring passes through the middle of the pin shaft. The pin shaft is placed in the groove at one end of the inner hexagonal head 1 connected to the electric wrench;

[0006] When the electric wrench rotates, it drives the inner hexagonal head to rotate, thereby driving the linear sliding of the internally threaded slider, and then driving the ejector rod to perform linear up and down movement to eject the bolt inside the inner hexagonal head.

[0007] Further, the internally threaded slider is provided with an internal trapezoidal thread, and the outer circle of the hexagonal head is provided with an external trapezoidal thread.

[0008] Further, the middle part of the outer circle of the inner hexagonal head is provided with an external trapezoidal thread, and the internally threaded slider is installed in the middle part of the outer circle of the inner hexagonal head.

[0009] Further, the protrusions on the internal-thread slider are inverted triangular protrusions, and there are two trapezoidal grooves on the inner wall of the outer circular housing, arranged in a 180° mirror image, which engage with the inverted triangular protrusions on both sides of the internal-thread slider.

[0010] Further, a slider spring is arranged on the end face of the internal-thread slider facing the electric wrench. The slider spring is located on the outer circle of the inner hexagonal head side. When the internal-thread slider moves towards the electric wrench side, the slider spring is in a compressed state. When the internal-thread slider moves towards the hexagonal bolt side, the spring is released.

[0011] Further, a sliding sleeve is arranged on the outer wall of the end of the outer circular housing on the electric wrench side, and there is a 2-mm step on the inner wall of the sliding sleeve.

[0012] Further, circular holes are provided on the surface of the outer circular housing. Steel balls are placed in the circular holes, and the sliding sleeve is located outside the circular holes to block the steel balls. The steel balls are in a rolling state at the step of the sliding sleeve for facilitating the sliding of the sliding sleeve, or the steel balls are restricted from rolling after being caught at the step after the displacement of the sliding sleeve.

[0013] Further, a sliding sleeve spring is arranged outside the outer circular housing, and the sliding sleeve spring is located inside the sliding sleeve.

[0014] Further, the sliding sleeve positioning screw is fixed on the outside of the outer circular housing and passes through the sliding sleeve to limit the movement stroke of the sliding sleeve.

[0015] Further, an upper cover is fixed at the top of the outer circular housing, and a circular hole is provided in the middle of the upper cover. One end of the inner hexagonal head passes through the circular hole.

[0016] For a special automatic ejecting sleeve for power line clamps of the present utility model, by utilizing the forward and reverse functions of the wrench, a ejector rod is designed inside the sleeve. When the wrench rotates forward (clockwise), the ejector rod descends. At this time, the sleeve can normally lock the bolt and break the bolt, and a part of the broken bolt is stuck inside the sleeve. At this time, the wrench is adjusted to rotate in reverse (counterclockwise), the ejector rod rises, and the broken and detached bolt stuck inside the sleeve head is ejected. Then the wrench is adjusted to the forward rotation function, and it can be recycled to realize the work of continuously locking the bolts of the line clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the general assembly drawing of a special automatic ejecting sleeve for power line clamps of the present utility model;

[0018] Figure 2 is the exploded view of a special automatic ejecting sleeve for power line clamps of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to better understand the technical solution of the present utility model, the following is a detailed description through specific embodiments:

[0020] Please refer toFigure 1 and Figure 2 , an automatic ejecting sleeve special for a power line clamp of the utility model. It includes an internal hexagonal head 1, an outer circular housing 2, a sliding sleeve spring 3, a sliding sleeve positioning screw 4, a sliding sleeve 5, a ejector rod tension spring 6, a pin shaft 7, a slider spring 8, a steel ball 9, an internally threaded slider 10, a tension spring shaft 11, a rolling bearing 12, an ejector rod 13 and an upper cover 14.

[0021] The outer side of the internal hexagonal head 1 is attached with a trapezoidal external thread. One end is in the shape of an internal hexagon for bolt fastening, and the other end is in the shape of an internal square for connecting the external square head of an electric wrench. The ejector rod 13 is cylindrical and is placed inside the internal hexagon side of the internal hexagonal head 1, and one end is connected to the ejector rod tension spring 6. The outer circular housing 2 is a metal-cut cylindrical cavity with symmetric groove slides cut inside; the internally threaded slider 10 is a metal-cut ring with protrusions cut at both ends and is placed inside the symmetric grooves of the outer circular housing and can slide up and down along the direction of the symmetric groove slides. The outer circular housing 2 is fixed, and the internal hexagonal head 1 in the middle rotates synchronously with the square head of the electric wrench.

[0022] Preferably, the internally threaded slider is provided with an internal trapezoidal thread, and the outer circle of the internal hexagonal head is provided with an external trapezoidal thread. The two are meshed with each other. More specifically, the external trapezoidal thread is located in the middle of the internal hexagonal head, and the internally threaded slider is installed in the middle of the outer circle of the internal hexagonal head.

[0023] Preferably, the protrusions on the internally threaded slider are inverted triangular protrusions, and there are two trapezoidal grooves on the inner wall of the outer circular housing, arranged in a 180° mirror image and meshed with the inverted triangular protrusions on both sides of the internally threaded slider.

[0024] Since the inverted triangular protrusions on both sides of the internally threaded slider are placed in the trapezoidal grooves of the outer circular housing, the slider does not rotate. The rotation of the internal hexagonal head drives the internally threaded slider to move linearly up and down. When the slider moves upward, it drives the ejector rod to eject upward. The broken bolt in the copper sleeve is ejected from the groove of the internal hexagonal head under the action of the ejector rod. Using the forward and reverse functions of the electric wrench, the ejector rod descends when the electric wrench rotates forward (clockwise). When it exceeds the meshing position of the trapezoidal thread of the internal hexagonal head, the internally threaded slider and the internal hexagonal head are no longer meshed, and the internally threaded slider no longer moves linearly; at this time, the sleeve can normally lock and break the bolt, and a part of the broken bolt is stuck in the sleeve; at this time, the wrench is adjusted to rotate in reverse (counterclockwise), then the ejector rod rises, and the broken and detached bolt stuck inside the sleeve head is ejected. Then the wrench is adjusted to the forward rotation function, and the cycle operation can be carried out.

[0025] Furthermore, in order to fix the ejector rod and reset its position to ensure that it does not affect the fastening. The tension spring shaft 11 passes through the centers of the ejector rod 13 and the internal hexagonal head 1. Rolling bearings 12 are installed at both ends of the tension spring shaft 11. The hook at one end of the ejector rod tension spring 6 passes through the middle of the tension spring shaft 11, and the other end of the ejector rod tension spring 6 passes through the middle of the pin shaft 7. The pin shaft 7 is placed in the groove at one end of the internal hexagonal head 1 connected to the electric wrench.

[0026] Further, a slider spring 8 is provided on the end face of the internal thread slider 10 facing the electric wrench side. The slider spring 8 is located on the outer circle of one side of the internal hexagon head 1 and contacts one side of the internal thread slider 10. When the internal thread slider moves towards the electric wrench side, the slider spring is in a compressed state. When the internal thread slider moves towards the hexagon bolt side, the spring is released.

[0027] Further, a sliding sleeve 5 is provided on the outer wall of the end of the outer circular housing 2 on the electric wrench side. The sliding sleeve 5 is a metal circular sleeve, and its inner wall is provided with a 2-mm step. A round hole is formed on the surface of the outer circular housing 2. A steel ball 9 is placed in the round hole. The sliding sleeve is located outside the round hole to block the steel ball. The steel ball is in a rolling state at the step of the sliding sleeve for facilitating the sliding of the sliding sleeve, or the rolling of the steel ball is restricted by being stuck at the step after the displacement of the sliding sleeve.

[0028] Further, a sliding sleeve spring 3 is provided outside the outer circular housing. The sliding sleeve spring 3 is located inside the sliding sleeve and functions to fix the sliding sleeve.

[0029] Further, a sliding sleeve positioning screw 4 is fixed outside the outer circular housing and passes through the sliding sleeve to limit the movement stroke of the sliding sleeve.

[0030] Further, an upper cover 14 is fixed to the top of the outer circular housing. The upper cover 14 is finished by metal cutting and has a circular hole in the middle. One end of the internal hexagon head passes through the circular hole of the upper cover.

[0031] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as within the scope of the substantial spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An automatic ejecting sleeve dedicated for a power line clamp, comprising an outer circular housing and an internal hexagonal head disposed inside the outer circular housing, characterized in that, It also includes an internal-thread slider, a ejector rod, a ejector-rod tension spring, a tension-spring shaft and a pin shaft; One end of the internal hexagon head is connected to the electric wrench, and the other end is connected to the hexagon bolt. The outer side of the internal hexagon head is provided with an external thread that mates with the internal-thread slider. The internal-thread slider meshes with the outer side of the internal hexagon head. The two sides of the internal-thread slider are provided with protrusions that mate with the chutes provided on the inner side surface of the outer circular housing, enabling the slider to slide along the chute within the outer circular housing. The ejector rod is arranged on one side of the hexagon-bolt connection end of the internal hexagon head. The tension-spring shaft passes through the centers of the ejector rod and the internal hexagon head, and rolling bearings are installed at both ends of the tension-spring shaft. The hook at one end of the ejector-rod tension spring passes through the middle of the tension-spring shaft, and the other end of the ejector-rod tension spring passes through the middle of the pin shaft. The pin shaft is placed in the groove at the end where the internal hexagon head is connected to the electric wrench; When the electric wrench rotates, it drives the internal hexagon head to rotate, thereby driving the linear sliding of the internal-thread slider, and then driving the ejector rod to perform linear up-and-down movement to eject the bolt inside the internal hexagon head.

2. The automatic ejection sleeve dedicated to a power line clamp according to claim 1, wherein, The internal-thread slider is provided with an internal trapezoidal thread, and the outer circle of the hexagon head is provided with an external trapezoidal thread.

3. The automatic ejection sleeve special for a power line clamp according to claim 2, characterized in that, The middle part of the outer circle of the internal hexagon head is provided with an external trapezoidal thread, and the internal-thread slider is installed in the middle part of the outer circle of the internal hexagon head.

4. The automatic ejection sleeve dedicated to a power line clamp according to claim 1, characterized in that, The protrusions on the internal-thread slider are inverted-triangle-shaped protrusions, and there are two trapezoidal grooves on the inner wall of the outer circular housing, arranged in a 180° mirror image, which mesh with the inverted-triangle-shaped protrusions on both sides of the internal-thread slider.

5. An automatic ejection sleeve special for a power line clamp according to claim 1, characterized in that, A slider spring is arranged on the end face of the internal-thread slider facing the electric wrench side. The slider spring is located on the outer circle of one side of the internal hexagon head. When the internal-thread slider moves towards the electric wrench side, the slider spring is in a compressed state. When the internal-thread slider moves towards the hexagon bolt side, the spring is released.

6. The automatic ejection sleeve dedicated to a power line clamp according to claim 1, characterized in that, A sliding sleeve is arranged on the outer wall of the end of the outer circular housing on the electric wrench side, and a 2-mm step is provided on the inner wall of the sliding sleeve.

7. The automatic ejection sleeve dedicated to a power line clamp according to claim 6, characterized in that, Round holes are provided on the surface of the outer circular housing, and steel balls are placed in the round holes. The sliding sleeve is located outside the round holes to block the steel balls. The steel balls are in a rolling state at the step of the sliding sleeve for easy sliding of the sliding sleeve, or the steel balls are restricted from rolling after the sliding sleeve is displaced and abutted against the step.

8. An automatic ejection sleeve dedicated to a power line clamp according to claim 7, characterized in that, A sliding-sleeve spring is arranged on the outside of the outer circular housing, and the sliding-sleeve spring is located inside the sliding sleeve.

9. The automatic ejection sleeve dedicated to a power line clamp according to claim 7, characterized in that The sliding-sleeve positioning screw is fixed on the outside of the outer circular housing and passes through the sliding sleeve to limit the movement stroke of the sliding sleeve.

10. The automatic ejection sleeve special for a power line clamp according to claim 1, wherein, An upper cover is fixed to the top of the outer circular housing, and a circular hole is provided in the middle of the upper cover. One end of the internal hexagon head passes through the circular hole.

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