Connecting bolt fastening device for subway contact rail
By designing a fastening device for subway contact rails, the difficulty of alignment of contact rails during installation is solved by using the combination of flat seats, fixed locks, movable locks, mutual columns, sliding sleeves and laser rangefinders. The problem of this is to achieve stable alignment and tightening of the contact rails, reducing the frequency of subsequent adjustments.
Patent Information
- Application Number
- CN202420755642.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-12
AI Technical Summary
During the installation of subway contact rails, due to the error of the inner diameter of the drill hole and the difference in the locking force of the nut, the top surface of the contact rail cannot be aligned, causing troubles to follow-up adjustment.
Design a fastening device, including a flat seat, a fixed seat, a movable seat, a mutual column, a sliding sleeve and a laser rangefinder, through the cooperation of the elastic support and the laser rangefinder, ensure the alignment of the contact rail ends, and The nut is securely locked through the bending locking device and the transmission of the bevel gear.
It effectively avoids the contact rails being held up or moved down during the locking nut, reduces the subsequent high-frequency adjustment, and ensures stable alignment and tightness of the contact rails.
Smart Images
Figure CN222472383U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of contact rail connection and installation, and in particular relates to a bolt fastening device for connecting a subway contact rail. Background Art
[0002] The subway contact rail is used for the subway pantograph to contact it, introducing the current transmitted from the ground into the subway's power facilities, thereby providing power for the subway operation.
[0003] During the actual installation of subway contact rails, due to the limited length of a single subway contact rail, it is inevitable to fix the two subway contact rails together to ensure the stability of the power supply to the subway pantograph.
[0004] When two subway contact rails are fixedly connected to each other, they cannot be confused with traditional rails, and thus the welding method cannot be used. The main reasons are: first, the traditional slag is unstable in conductivity, and second, the friction loss of the contact rail is large. Therefore, when it is necessary to replace some sections of the contact rail, the welding method will cause certain inconveniences for subsequent replacement. For this reason, the contact rails are usually connected to each other by overlapping conductive aluminum blocks. During installation, align the ends of the two subway contact rails, align the mounting holes of the conductive aluminum block with the side of the contact rail, and drill holes. After completion, apply conductive glue to the contact positions of the conductive aluminum block and the upper and lower parts and sides of the contact rail, and pass the connecting bolts through the conductive aluminum block and the holes on the side of the contact rail. Insert one end of the connecting bolt into the anti-slip gasket and screw in the nut. Use an electric screwdriver to drive the hexagon socket head to lock the nut to complete the installation.
[0005] It can be seen from this that the overlapping method of conductive aluminum blocks can effectively realize the connection between the battery cells of two subway contact rails. On the basis of ensuring the stability of the connection, it can also ensure the convenience of subsequent replacement of some sections of the contact rails.
[0006] However, in the process of tightening the nuts on the connecting bolts with an electric screwdriver, the top surfaces of the two contact rails may not be aligned due to the error in the inner diameter of the drilled holes and the difference in the tightening force of each nut. In actual installation, the height error of the top surfaces of the two contact rails must be guaranteed to be less than 0.3 mm. Therefore, in this case, it causes considerable trouble in subsequent adjustments. For this reason, it is necessary to provide a tightening device that can stabilize the flush state of the two subway contact rails during the tightening of the connecting bolts. Utility Model Content
[0007] The utility model aims to provide a bolt fastening device for connecting a subway contact rail, so as to solve the problems existing in the prior art.
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bolt fastening device for connecting a subway contact rail, comprising at least two flat seats sleeved on the top of the contact rail, a fixed clamping seat is arranged on one side of the bottom of each flat seat and the fixed clamping seat is sleeved into one side of the top of the contact rail, an elastic support mechanism is arranged on the flat seat, a movable plate is arranged on the elastic support mechanism, a movable clamping seat is arranged on the bottom of the movable plate and the movable clamping seat is sleeved into the other side of the top of the contact rail, and the elastic support mechanism is used to elastically limit the movable clamping seat from being separated from one side of the top of the contact rail;
[0009] Mutual columns are connected between adjacent leveling seats, and a sliding sleeve is provided on the mutual columns. A connecting plate is connected to one end of the sliding sleeve, and a vertical push plate is slidably provided on the connecting plate. A support sleeve is slidably provided at the bottom of the vertical push plate, and a rotating rod 1 is rotatably provided in the support sleeve, and a hexagonal sleeve is provided at one end of the rotating rod 1, and a bending and locking rotation device is provided at one end of the support sleeve, and the bending and locking rotation device is used to drive the rotating rod 1 and the hexagonal sleeve to rotate by vertically driving with the help of an external electric screwdriver.
[0010] In order to elastically limit the movable card seat from being separated from the top side of the contact rail, preferably, a slide groove is provided on the top of the flat seat, a connecting column is connected in the slide groove, a slider is slidably arranged in the slide groove and the slider is sleeved on the connecting column, a spring 1 is also sleeved on the connecting column, and both ends of the spring 1 are elastically supported on the slider and an inner wall of the slide groove;
[0011] The top of the sliding block is connected with a connecting rod 1, and one end of the connecting rod 1 is connected to the top of the movable plate.
[0012] In order to enable another person to check the alignment of the contact rails on both sides while one worker is tightening the connecting bolts, preferably, a laser rangefinder is provided at the bottom of the sleeve, and a transmission line of the laser rangefinder is connected to an external computer.
[0013] In order to prevent the sliding sleeve from turning over on the mutual pillar, preferably, the sliding sleeve is a square sleeve and the cross section of the mutual pillar is square.
[0014] In order to achieve a relatively stable effect after the hexagonal socket is inserted into the nut, preferably, a movable opening is provided at the top of the vertical push plate, the connecting plate passes through the movable opening, a connecting rod is connected to the movable opening and the connecting rod passes through the connecting plate, a spring 2 is sleeved on the connecting rod, and both ends of the spring 2 are elastically supported on the top of the movable opening and the connecting plate.
[0015] In order to realize the vertical rotation of the transversely arranged nut by the electric screwdriver, preferably, the bending and locking rotation device includes a transmission box arranged at one end of the support sleeve, one end of the rotating rod one passes through and is rotatably arranged on one side of the transmission box, one end of the rotating rod one inserted into the transmission box is connected with a bevel gear one, the top of the transmission box is rotatably provided with a rotating rod two, one end of the rotating rod two inserted into the transmission box is connected with a bevel gear two, the bevel gear one is meshed with the bevel gear two, and the top of the rotating rod two is connected with a rotating plug, and the rotating plug is used to insert the hexagonal joint of the external electric screwdriver.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] In the utility model, by moving the sliding sleeve to different contact rails, measuring the distance value by a laser rangefinder, and checking the change of the distance value by an external laptop computer, it can be determined whether the contact rail is deformed. When locking the nut, the vertical push plate can be moved down, and the support sleeve can be pushed toward the nut until the hexagon socket is inserted into the nut, and the hexagonal connector loaded with the electric screwdriver is inserted into the screw plug, and the electric screwdriver is started. Through the transmission cooperation between the bevel gear 1 and the bevel gear 2, the hexagon socket is driven to rotate, thereby realizing the locking of the nut;
[0018] In the utility model, during the entire process of tightening the connecting bolts, under the action of the fixed holders, the movable holders and the mutual columns on both sides, the ends of the two contact rails are effectively aligned, thereby preventing one of the contact rails from rolling up or moving down during the process of tightening the nuts. In the process of mass installation, the need for subsequent high-frequency adjustments can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a main schematic diagram of the utility model;
[0020] Figure 2 for Figure 1 A partial cutaway diagram of
[0021] Figure 3 for Figure 1 Schematic diagram of the section at AA;
[0022] Figure 4 for Figure 1 A left view cut at BB of FIG.
[0023] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of the mid-bending locking device.
[0024] In the figure: 1 flat seat, 3 fixed seat, 4 connecting column, 5 slider, 6 spring 1, 7 connecting rod 1, 8 movable plate, 9 movable seat, 10 mutual column, 11 sliding sleeve, 12 laser rangefinder, 13 connecting plate, 14 vertical push plate, 15 connecting rod, 16 spring 2, 17 support sleeve, 18 transmission box, 19 rotary rod 1, 20 hexagon socket, 21 bevel gear 1, 22 rotary rod 2, 23 bevel gear 2, 24 rotary plug. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the embodiment of the utility model provides a bolt fastening device for connecting the contact rail of a subway, comprising two flat seats 1 sleeved on the top of the contact rail, and the bottom of the flat seat 1 is provided with an arc-shaped groove, and the flat seat 1 is attached to the top of the contact rail through its arc-shaped groove. The front side of the bottom of the flat seat 1 is integrally provided with a fixed card seat 3, and the fixed card seat 3 is sleeved into the front side of the top of the contact rail, and an elastic support mechanism is provided on the flat seat 1, and a movable plate 8 is provided on the elastic support mechanism. The bottom of the movable plate 8 is provided with a movable card seat 9, and the movable card seat 9 is sleeved into the other side of the top of the contact rail. The elastic support mechanism is used to elastically limit the movable card seat 9 from leaving one side of the top of the contact rail;
[0027] Therefore, under the operation of the elastic support mechanism, the elastic support movable clamping seat 9 is clamped into the other side of the top of the contact rail, and under the coordinated clamping action of the fixed clamping seat 3 and the movable clamping seat 9, the flattening seat 1 is more stably placed on the contact rail.
[0028] Mutual columns 10 are bolted between adjacent flat seats 1, and sliding sleeves 11 are slidably provided on the mutual columns 10. A connecting plate 13 is bolted to the rear end of the sliding sleeve 11, and a vertical push plate 14 is slidably provided on the connecting plate 13. A support sleeve 17 is slidably provided at the bottom of the vertical push plate 14. More specifically, a square hole is provided at the bottom of the push plate 14, and the support sleeve 17 is a square sleeve with a circular hole at the center. Under such a setting, the support sleeve 17 cannot rotate under the push plate 14. A rotating rod 19 is rotatably provided in the support sleeve 17, and a hexagonal sleeve 20 is integrally provided at the right end of the rotating rod 19. A bending and locking rotation device is provided at the rear end of the support sleeve 17, and the bending and locking rotation device is used to drive the rotating rod 19 and the hexagonal sleeve 20 to rotate by means of a vertical drive of an external electric screwdriver.
[0029] Under such a setting, different nuts can be locked on the left and right sides, and when there is a height difference between the nuts, the nuts with the height difference can be locked by adjusting the height.
[0030] Most importantly, under the action of the bending and locking device, the electric screwdriver can provide vertical rotational power to lock the nut.
[0031] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , a slide groove is provided on the top of the flat seat 1, and the slide groove is a square groove structure. The front side of the inner wall of the slide groove is connected to the key column integrally provided at the right end of the connecting column 4, and the key column is fixed by screws. A slider 5 is slidably inserted into the slide groove, and the slider 5 is slidably sleeved on the connecting column 4. The slider 5 is a square block, and a spring 6 is sleeved on the connecting column 4. The spring 6 is a compression-rebound type, and the initial compression-rebound force of the spring 6 is 40 Newtons. The two ends of the spring 6 are elastically supported on the slider 5 and an inner wall of the slide groove;
[0032] The top of the slider 5 is fixed with a connecting rod 7 by bolts, and the rear end of the connecting rod 7 is fixed with the top of the movable plate 8 by bolts.
[0033] The elastic support of spring 16 can limit the movable card seat 9 from being separated from the top side of the contact rail. In addition, under such a setting, the fastening device can be separated from the contact rail by pulling the movable card seat 9 and the fixed card seat 3 outward and moving the fastening device upward.
[0034] Under the cooperation of the mutual pillars 10 and the movable clamping seats 9 and the fixed clamping seats 3 on both sides, the ends of the two contact rails are effectively aligned to prevent one of the contact rails from being rolled up or moved down during the process of locking the nut.
[0035] It is worth noting that the leveling seat 1, the fixed seat 3, the movable plate 8 and the movable clamping seat 9 are all made of tungsten-chromium-cobalt alloy with high wear resistance, and the inner surfaces of the four need to be regularly maintained with high precision to ensure that the accuracy of the leveling seat 1, the fixed seat 3 and the movable clamping seat 9 can be effectively guaranteed during the long-term clamping or detachment from the contact rail. In addition, after the fastening device is installed on the contact rail, by observing the contact between the leveling seat 1, the fixed seat 3 and the movable clamping seat 9 and the contact rail, it is determined whether the contact rail has cross-sectional deformation, which provides a basis for judgment when replacing the contact rail.
[0036] See also Figure 1 , Figure 2 and Figure 4 A laser rangefinder 12 is fixed to the bottom of the sliding sleeve 11 by screws, and a transmission line of the laser rangefinder 12 is connected to an external computer.
[0037] The transmission line length of the laser rangefinder 12 is 2 meters, which is connected to the signal access terminal of the external laptop computer. By moving the sleeve 11 to different contact rails, the laser rangefinder 12 measures the distance value, and the external laptop computer checks the change of the distance value, based on which it can be determined whether the contact rail is deformed.
[0038] See also Figure 1 , Figure 2 and Figure 4 The sliding sleeve 11 is a square sleeve, and the cross section of the mutual column 10 is square. Under such an arrangement, the sliding sleeve 11 cannot rotate on the mutual column 10.
[0039] See also Figure 1 , Figure 2 and Figure 4 A movable opening is provided at the top of the vertical push plate 14, and the movable opening is a square opening. The connecting plate 13 slides through the movable opening. A connecting rod 15 slides through the movable opening. The top of the connecting rod 15 is fixed by a screw. The connecting rod 15 slides through the connecting plate 13. A spring 2 16 is sleeved on the connecting rod 15. Both ends of the spring 2 16 are elastically supported on the top of the movable opening and the connecting plate 13. The spring 2 16 is a compression-rebound type. The initial compression-rebound force of the spring 2 16 is 11 Newtons. Under the elastic support of the spring 2 16, after the hexagonal socket 20 is inserted into the nut, the hexagonal socket 20 is more stably sleeved on the nut under the action of the upward elastic force.
[0040] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The bending and locking device includes a transmission box 18 fixed to the rear end of the support sleeve 17 by an annular bolt, a connecting shaft is integrally provided at the rear end of the rotating rod 19, and the connecting shaft is slidably penetrated and rotatably provided at the front side of the transmission box 18, and further, a bearing hole is provided at the front end of the transmission box 18, and the bearing 1 is inserted into the bearing hole through interference, and the connecting shaft is inserted into the inner ring of the bearing 1 through interference. The connecting shaft of the rotating rod 19 penetrates into one end of the transmission box 18 and is connected to a bevel gear 1 21 through an interference key, and the top of the transmission box 18 is rotatably provided with a rotating rod 2 22, and further, a bearing hole is provided at the top of the transmission box 18, and the bearing 2 is inserted into the bearing hole through interference, and the rotating rod 2 22 penetrates into the lower end of the transmission box 18 and is connected to a bevel gear 2 23 through an interference key, and the bevel gear 1 21 meshes with the bevel gear 2 23, and a rotating plug 24 is integrally provided at the top of the rotating rod 22, and the rotating plug 24 is used to insert the hexagonal joint of the external electric screwdriver.
[0041] When the electric screwdriver is loaded with a hexagonal connector, it can be vertically inserted into the screw plug 24, and the electric screwdriver is started. Through the transmission cooperation between the bevel gear 1 21 and the bevel gear 2 23, the hexagon socket 20 is driven to rotate, thereby achieving the locking and loosening of the nut.
[0042] The working principle of this embodiment is as follows: when the ends of two subway contact rails are aligned, holes are drilled by aligning the mounting holes of the conductive aluminum block with the side of the contact rail. Conductive glue is applied to the contact positions of the conductive aluminum block with the upper and lower parts and the side of the contact rail, and the connecting bolts are passed through the conductive aluminum block and the side of the contact rail. After one end of the connecting bolt is inserted into the anti-slip gasket and the nut is initially screwed in, the fixed card seat 3 and the movable card seat 9 are pulled outward, and the bottom of the flat seat 1 is effectively attached to the upper surface of the contact rail, and the fixed card seat 3 and the movable card seat 9 are loosened. By moving the sliding sleeve 11 to different contact rails, the distance value is measured by the laser rangefinder 12, and the change of the distance value is checked by the external laptop computer, it can be determined whether the contact rail is deformed based on this. If deformation occurs, the contact rail can be replaced immediately, and then the above steps are performed.
[0043] When locking the nut, the vertical push plate 14 can be moved downward, and the support sleeve 17 can be pushed toward the nut until the hexagon socket 20 is inserted into the nut. Under the compression and rebound force of the second spring 16, the hexagon socket 20 is more stably inserted into the nut. The hexagon socket loaded with the electric screwdriver with the hexagon socket is inserted into the screw plug 24, and the electric screwdriver is started. Through the transmission cooperation between the bevel gear 1 21 and the bevel gear 2 23, the hexagon socket 20 is driven to rotate, thereby locking the nut.
[0044] During the entire process of tightening the connecting bolts, the fixed holders 3 on both sides, the movable holders 9 and the mutual columns 10 therebetween are used to effectively align the ends of the two contact rails, thereby preventing one of the contact rails from rolling up or moving down during the tightening of the nuts. This can effectively reduce the need for subsequent high-frequency adjustments during a large number of installations.
[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.
Claims
1. A bolt fastening device for connecting a subway contact rail, characterized in that: The invention comprises at least two leveling seats (1) sleeved on the top of the contact rail, a fixed clamping seat (3) is provided on one side of the bottom of each leveling seat (1), and the fixed clamping seat (3) is sleeved on one side of the top of the contact rail, an elastic support mechanism is provided on the leveling seat (1), a movable plate (8) is provided on the elastic support mechanism, a movable clamping seat (9) is provided on the bottom of the movable plate (8), and the movable clamping seat (9) is sleeved on the other side of the top of the contact rail, and the elastic support mechanism is used to elastically limit the movable clamping seat (9) from leaving one side of the top of the contact rail; Mutual columns (10) are connected between adjacent parallel seats (1), a sliding sleeve (11) is provided on the mutual columns (10), one end of the sliding sleeve (11) is connected to a connecting plate (13), a vertical push plate (14) is slidably provided on the connecting plate (13), a support sleeve (17) is slidably provided at the bottom of the vertical push plate (14), a rotating rod (19) is rotatably provided in the support sleeve (17), one end of the rotating rod (19) is provided with an inner hexagon socket (20), and one end of the support sleeve (17) is provided with a bending and locking rotation device, and the bending and locking rotation device is used to drive the rotating rod (19) and the inner hexagon socket (20) to rotate by means of a vertical drive of an external electric screwdriver.
2. A bolt fastening device for connecting a subway contact rail according to claim 1, characterized in that: A slide groove is provided on the top of the flat seat (1), a connecting column (4) is connected to the slide groove, a slider (5) is slidably arranged in the slide groove, and the slider (5) is sleeved on the connecting column (4), and a spring (6) is sleeved on the connecting column (4), and both ends of the spring (6) are elastically supported on the slider (5) and an inner wall of the slide groove; The top of the sliding block (5) is connected to a connecting rod (7), and one end of the connecting rod (7) is connected to the top of the movable plate (8).
3. The bolt fastening device for connecting subway contact rails according to claim 1, characterized in that: A laser rangefinder (12) is arranged at the bottom of the sliding sleeve (11), and a transmission line of the laser rangefinder (12) is connected to an external computer.
4. The bolt fastening device for connecting subway contact rails according to claim 1, characterized in that: The sliding sleeve (11) is a square sleeve, and the cross section of the mutual column (10) is a square.
5. The bolt fastening device for connecting subway contact rails according to claim 1, characterized in that: A movable opening is provided at the top of the vertical push plate (14), the connecting plate (13) passes through the movable opening, a connecting rod (15) is connected inside the movable opening and the connecting rod (15) passes through the connecting plate (13), a second spring (16) is sleeved on the connecting rod (15), and both ends of the second spring (16) are elastically supported on the top of the movable opening and the connecting plate (13).
6. The bolt fastening device for connecting subway contact rails according to claim 1, characterized in that: The bending and locking rotation device comprises a transmission box (18) arranged at one end of a support sleeve (17); one end of a rotating rod (19) penetrates and is rotatably arranged on one side of the transmission box (18); one end of the rotating rod (19) that penetrates into the transmission box (18) is connected to a bevel gear (21); a rotating rod (22) is rotatably arranged on the top of the transmission box (18); one end of the rotating rod (22) that penetrates into the transmission box (18) is connected to a bevel gear (23); the bevel gear (21) is meshed with the bevel gear (23); a rotating plug (24) is connected to the top of the rotating rod (22); the rotating plug (24) is used to insert a hexagonal joint of an external electric screwdriver.