Flexible sleeve for automatic bolt fastening operation of contact network

Abstract

The utility model discloses a flexible sleeve for automatic bolt fastening operation of an overhead line system, which comprises a sleeve, a front end cover and a rear end cover are respectively arranged at two ends of the sleeve, a spring, a movable column and a steel ball are sequentially arranged in the sleeve between the front end cover and the rear end cover, the front end cover is connected with the sleeve, and the movable column is connected with the sleeve. And a plug of the sleeve penetrates through the front end cover and extends into the steel ball. According to the utility model, the spring, the movable column, the steel ball and the front end cover are matched together, so that the flexible sleeve is endowed with an automatic aligning function. In the operation process, the movable column and the steel ball can automatically return under the action of external force, it is guaranteed that the sleeve is kept coaxial all the time, and uneven fastening or damage caused by deviation of a bolt or a nut is avoided.

Description

Technical Field

[0001] This utility model relates to the field of sleeve technology, and in particular to a flexible sleeve for automated bolt tightening operations on overhead contact lines. Background Technology

[0002] The railway overhead contact system is a crucial component of railway electrification, providing a stable and reliable power supply for electric locomotives. In the routine maintenance of the contact system, bolt tightening is a critical step. Loose or improperly tightened bolts can lead to performance degradation of the contact system equipment and even safety accidents. Traditional bolt tightening operations typically rely on manual labor and must be performed when the train is stopped and power is off. Manual operation is not only labor-intensive and inefficient, but also poses serious safety risks to workers due to the dangers of working at heights. Furthermore, the stability and consistency of manual operation are difficult to guarantee, easily leading to uneven bolt tightening, which in turn affects the normal operation of the equipment.

[0003] To address the aforementioned issues, automated bolt tightening technology has been gradually adopted, aiming to replace manual labor in bolt tightening operations with robotic arms. However, current equipment for automated bolt tightening still has many shortcomings. For example, the fit between the robotic arm's end effector and the bolt is not precise enough, failing to meet the tightening requirements of bolts of different sizes. Furthermore, the reliability and durability of the equipment need improvement during high-frequency operations. Therefore, developing a sleeve specifically designed for automated bolt tightening operations on overhead contact lines would not only improve operational efficiency and reduce labor costs but also significantly enhance operational safety and the stability of tightening results, which is of great significance for ensuring the normal operation of the railway overhead contact system. Utility Model Content

[0004] The purpose of this invention is to provide a flexible sleeve for automated bolt tightening operations on overhead contact lines, which solves the technical problems of low bolt tightening efficiency, significant safety hazards, and improper tightening in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flexible sleeve for automated bolt tightening operations on overhead contact lines includes a sleeve with a front end cap and a rear end cap at both ends. A spring, a movable column, and a steel ball are sequentially arranged inside the sleeve between the front end cap and the rear end cap. The sleeve is connected to the front end cap, and the plug of the sleeve passes through the front end cap and extends into the steel ball.

[0007] Preferably, the rear end cover has a blind hole in the middle for cooperating with the electric screwdriver bit, and the rear end cover is connected to the sleeve by a pin.

[0008] Preferably, the side of the rear end cover is provided with a headless screw for fixing the electric screwdriver bit.

[0009] Preferably, the movable column has a blind hole on the side facing the spring, one end of the spring abuts against the inner wall of the rear end cover, and the other end abuts against the blind hole; the movable column has a first conical hole on the side facing the steel ball, and one end of the steel ball abuts against the first conical hole.

[0010] Preferably, the front end cover has a through hole in the middle that mates with the sleeve, and a second conical hole on the side facing the steel ball, with the end of the steel ball away from the movable column abutting against the second conical hole.

[0011] Preferably, the sphere is an elliptical sphere with a blind hole on the side facing the front cover, and the opening of the blind hole is directly opposite the through hole of the front cover.

[0012] Preferably, the sleeve also includes a sleeve head that mates with the sleeve, the sleeve head being connected to the sleeve via a square head. Under radial force, the axes of the sleeve, square head, and sleeve head form a certain angle. This angle design effectively compensates for deviations caused by visual recognition errors. When the radial force disappears, the sleeve will automatically return to its original position under the action of a spring, ensuring precise tightening of the bolt or nut.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention utilizes the combined action of a spring, a movable column, a steel ball, and a front end cap to provide the flexible sleeve with an automatic self-aligning function. During operation, the design of the movable column and steel ball enables automatic self-alignment under external force, ensuring that the sleeve remains coaxial and preventing uneven tightening or damage caused by bolt or nut misalignment. Attached Figure Description

[0015] Figure 1 This is a top view of the present invention;

[0016] Figure 2 This utility model Figure 1 Schematic diagram of the cross-sectional structure of the middle AA section;

[0017] Figure 3 This is a cross-sectional structural diagram of the movable column of this utility model;

[0018] Figure 4 This is a cross-sectional view of the front end cover of this utility model.

[0019] In the diagram: 1. Sleeve, 2. Front end cap, 3. Sleeve, 4. Steel ball, 5. Movable column, 6. Rear end cap, 7. Pin, 8. Headless screw, 9. Sleeve head, 10. Square head, 11. Spring, 12. First conical hole, 13. Second conical hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 A flexible sleeve for automated bolt tightening operations on overhead contact lines includes a sleeve 1 with a front end cap 2 and a rear end cap 6 at both ends. The rear end cap 6 is fixed to the sleeve 1 by a pin 7. A headless screw 8 is provided on the side for fixing an electric screwdriver bit. The front end cap 2 is welded to the sleeve 1. The headless screw 8 ensures a stable connection between the sleeve 1 and the electric screwdriver bit, preventing loosening or detachment due to weak connection under high-intensity or high-torque operation. This design ensures the stability and safety of the equipment during long-term operation.

[0022] A spring 11, a movable column 5, and a steel ball 4 are sequentially placed abutting inside the sleeve 1 between the front end cover 2 and the rear end cover 6. The movable column 5 and the steel ball 4 can move slightly along the axial direction of the sleeve 1 under the action of the spring 11. The center lines of the spring 11, the movable column 5, and the steel ball 4 are on the same center line.

[0023] The movable column 5 has a blind hole on the side facing the spring 11. One end of the spring 11 is fixed against the inner wall of the rear end cover 6, and the other end is fixed against the blind hole of the movable column 5. The movable column 5 has a first conical hole 12 on the side facing the steel ball 4, and one end of the steel ball 4 is fixed against the first conical hole 12.

[0024] The front cover 2 has a through hole in the middle for engaging with the sleeve 3. For example, if the sleeve 3 is a hexagonal sleeve, the through hole is an internal hexagonal through hole. The front cover 2 has a second conical hole 13 on the side facing the steel ball 4, and the end of the steel ball 4 away from the movable column 5 rests against the second conical hole 13. The steel ball 4 is an elliptical sphere with a blind hole on the side facing the front cover 2, the opening of which is directly opposite the through hole of the front cover 2. The sleeve 3 is connected to the front cover 2, and the plug of the sleeve 3 passes through the front cover 2 and extends into the steel ball 4. The cooperation of the spring 11 with the movable column 5, the steel ball 4, and the front cover 2 allows the sleeve 3 to automatically return to its center under radial force (when the radial force disappears, the sleeve 3 automatically returns to its center under the action of the spring 11), maintaining coaxiality. In this way, the sleeve 3 maintains precise alignment throughout the tightening process, effectively avoiding bolt or nut misalignment that may occur in traditional technologies, thereby improving operational accuracy.

[0025] The steel ball 4 is positioned between the movable column 5 and the front end cover 2, and can slightly swing within the first conical hole 12 and the second conical hole 13. One end of the sleeve 3 is equipped with a sleeve head 9 that mates with it, and the sleeve head 9 is connected to the sleeve 3 via a square head 10. Under radial force, the design of the sleeve 3, square head 10, and sleeve head 9 causes their axes to form a certain angle, effectively compensating for visual recognition errors. In traditional technology, errors may lead to incorrect nut alignment, but this invention effectively eliminates this problem through a compensation mechanism, improving the reliability of the fastening operation.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flexible sleeve for automated bolt tightening operations on overhead contact lines, characterized in that, Includes a sleeve (1), with a front end cap (2) and a rear end cap (6) at both ends of the sleeve (1). A spring (11), a movable column (5) and a steel ball (4) are arranged in sequence inside the sleeve (1) between the front end cap (2) and the rear end cap (6). A sleeve (3) is connected to the front end cap (2), and the plug of the sleeve (3) passes through the front end cap (2) and extends into the steel ball (4).

2. A flexible sleeve for automated bolt tightening operations on overhead contact lines according to claim 1, characterized in that, The rear end cover (6) has a blind hole in the middle for cooperating with the electric screwdriver bit, and the rear end cover (6) is connected to the sleeve (1) by a pin (7).

3. A flexible sleeve for automated bolt tightening operations on overhead contact lines according to claim 2, characterized in that, The side of the rear cover (6) is provided with headless screws (8).

4. A flexible sleeve for automated bolt tightening operations on overhead contact lines according to claim 1, characterized in that, The movable column (5) has a blind hole on the side facing the spring (11), one end of the spring abuts against the inner wall of the rear cover (6), and the other end abuts against the blind hole; the movable column (5) has a first conical hole (12) on the side facing the steel ball (4), and one end of the steel ball (4) abuts against the first conical hole (12).

5. A flexible sleeve for automated bolt tightening operations on overhead contact lines according to claim 4, characterized in that, The front cover (2) has a through hole in the middle that mates with the sleeve (3), and a second conical hole (13) is provided on the side facing the steel ball (4). The end of the steel ball (4) away from the movable column (5) abuts against the second conical hole (13).

6. A flexible sleeve for automated bolt tightening operations on overhead contact lines according to claim 5, characterized in that, The ball (4) is an elliptical sphere with a blind hole on the side facing the front cover (2), and the opening of the blind hole is directly opposite the through hole of the front cover (2).

7. A flexible sleeve for automated bolt tightening operations on overhead contact lines according to claim 1, characterized in that, It also includes a sleeve head (9) that mates with the sleeve (3), the sleeve head (9) being connected to the sleeve (3) via a square head (10).

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