A support device

Abstract

The present invention discloses a support device, which includes a base, a height fine-tuning mechanism, a telescopic rod, and a clamping mechanism for clamping a catenary. A chuck capable of clamping a track is provided at the bottom of the base. The height fine-tuning mechanism includes a double-headed screw, a first threaded pipe, and a second threaded pipe. One end of the first threaded pipe is connected to the base, and the other end is threadedly connected to the lower end of the double-headed screw. One end of the second threaded pipe is threadedly connected to the upper end of the double-headed screw, and the other end is connected to the telescopic rod. The telescopic rod is connected to the clamping mechanism; the thread directions at both ends of the double-headed screw are opposite. By using the support device of the present invention, it is applicable to railway lines with different structural heights, and it is not necessary to rely on a rail vehicle to complete the support of the cantilever, so as to quickly replace the porcelain insulator.

Description

Technical Field

[0001] The present invention relates to the field of rail transit, and more particularly to a support device. Background Art

[0002] The catenary boom is a structural device installed at the upper end of a pillar for supporting the positioning device and the catenary suspension and transmitting the load of the catenary suspension to the pillar or other buildings. After the porcelain insulator on the fixing device boom is damaged, the boom will sag, increasing the tension of the catenary and causing short circuits or leakage. To ensure the normal passage of the rail vehicle, it is necessary to replace the porcelain insulator on the boom. When replacing the porcelain insulator, to prevent the boom from sagging, a support device is required to support the boom.

[0003] The Chinese invention patent specification with the publication number CN105371072B discloses a support device that can support the boom. It uses a hydraulic method to finely adjust the height of the support device. However, the maximum height of this support device cannot be too high, otherwise its weight will be too heavy. Generally, a height of 2.5 m is more appropriate. And the shortest distance between the boom and the track is 6.5 m. Therefore, this support device can only be installed on a rail vehicle and rely on the height of the rail vehicle to support the boom, which limits the scope of use of this support device and cannot be applied to railway lines with different structural heights.

[0004] In view of the above problems existing in the prior art, it is of great significance to provide a new support device. Summary of the Invention

[0005] To solve the above problems, the present invention provides a support device that can be applied to railway lines with different structural heights and can complete the support of the boom without relying on a rail vehicle to quickly replace the porcelain insulator.

[0006] To achieve the above object, the support device of the present invention includes a base, a height fine adjustment mechanism, a telescopic rod, and a clamping mechanism for clamping the messenger wire. The bottom of the base is provided with a chuck capable of clamping the track. The height fine adjustment mechanism includes a double-headed screw, a first threaded pipe, and a second threaded pipe. One end of the first threaded pipe is connected to the base, and the other end is threadedly connected to the lower end of the double-headed screw. One end of the second threaded pipe is threadedly connected to the upper end of the double-headed screw, and the other end is connected to the telescopic rod. The telescopic rod is connected to the clamping mechanism; the thread directions at both ends of the double-headed screw are opposite.

[0007] Preferably, the lower end of the double-headed screw is provided with a left-handed thread, and the upper end is provided with a right-handed thread.

[0008] Preferably, the chuck includes a fixed arm, a rotating arm and a lead screw. The fixed arm is mounted on the track. The rotating arm is hinged to the fixed arm. One end of the lead screw is connected to the rotating arm, and the other end is connected with a rotating handle. By rotating the rotating handle, the lead screw can push the rotating arm to rotate towards the direction close to the track, so that the rotating arm and the fixed arm jointly clamp the track.

[0009] Preferably, a rotating fork head is connected to the chuck. The rotating fork head can rotate relative to the chuck, and an eccentric shaft for locking the rotating fork head is provided on the chuck; the rotating fork head is detachably connected to the first threaded pipe.

[0010] Further, a groove is formed in the chuck. A flange capable of being placed in the groove is provided at the bottom of the rotating fork head. The flange can rotate circumferentially along the groove. A first limiting plate and a second limiting plate for limiting the flange in the groove are provided above the groove. A through hole communicating with the groove is formed in the first limiting plate. The eccentric shaft passes through the through hole and inserts into the groove. By rotating the eccentric shaft, the eccentric shaft can lock the flange to stop the flange from rotating.

[0011] Preferably, the height fine adjustment mechanism further includes a bidirectional ratchet mechanism capable of driving the double-headed screw to rotate. The ratchet of the bidirectional ratchet mechanism is fixedly connected to the double-headed screw.

[0012] Preferably, the telescopic rod includes a plurality of sleeves nested in sequence. A plurality of positioning holes are provided on the sleeves. The plurality of sleeves are connected by inserting positioning pins into the positioning holes.

[0013] Preferably, the clamping mechanism includes a first clamping portion, a second clamping portion, a screw rod and a nut. A perforation for the bearing cable to pass through is formed between the first clamping portion and the second clamping portion. One end of the first clamping portion and one end of the second clamping portion are hinged. A first U-shaped opening extending along the length direction of the first clamping portion is formed at the other end of the first clamping portion. A second U-shaped opening extending along the length direction of the second clamping portion is formed at the other end of the second clamping portion. A rotating shaft is penetrated through the second U-shaped opening. One end of the screw rod is hinged to the rotating shaft, and the other end passes upward through the first U-shaped opening and the first clamping portion and the second clamping portion are locked by the nut.

[0014] Further, the nut is a wing nut.

[0015] The support device of the present invention can achieve fine adjustment of height with high speed through a height fine adjustment mechanism provided with a double-headed screw and a bidirectional ratchet mechanism. The support device has a pure mechanical structure, does not require electric drive, has high adjustment accuracy and good stability. At the same time, compared with the support devices of the prior art, the support device of the present invention is light in weight, can reach the height requirement of the catenary boom, and can support the boom without relying on a rail car, thus quickly replacing the porcelain insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the support device of the present invention;

[0017] Figure 2 is Figure 1 a partial enlarged view of part A of

[0018] Figure 3 is Figure 1 a partial enlarged view of part B of

[0019] Figure 4 is Figure 1 a partial enlarged view of part C of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the structure and working principle of the present invention with reference to the drawings.

[0021] Referring to Figure 1 , the support device of the present invention includes a base 10, a height fine adjustment mechanism 20, a telescopic rod 30, and a clamping mechanism 40 for clamping the catenary. When the porcelain insulator needs to be replaced, the support device can be used to support the catenary, and then support the boom to prevent the boom from sagging.

[0022] Referring to Figure 2 , which shows the structure of the base 10. A chuck 11 capable of clamping the rail is provided at the bottom of the base 10. The chuck 11 includes a fixed arm 111, a rotating arm 112, and a lead screw 17. The fixed arm 111 is L-shaped and is erected on the rail. The rotating arm 112 is hinged to one end of the fixed arm 111 and is used to cooperate with the fixed arm 111 to jointly clamp the rail. The chuck 11 can clamp different rails by rotating the rotating arm 112. The rotation of the rotating arm 112 can be realized by setting the lead screw 17. Specifically, one end of the lead screw 17 is connected to the rotating arm 112, and the other end is connected with a rotating handle 16. By rotating the rotating handle 16, the lead screw 17 can push the rotating arm 112 to rotate towards the rail, so that the rotating arm 112 and the fixed arm 111 jointly clamp the rail. When the support device needs to be removed from the rail, only need to rotate the rotating handle 16 in the reverse direction, and the lead screw 17 drives the rotating arm 112 to rotate away from the rail, then the rail can be released.

[0023] In order to enable the support device to adjust its support angle according to actual needs and enhance the flexibility of the support device, a rotary fork head 12 can be connected to the chuck 11. The rotary fork head 12 can rotate relative to the chuck 11, and an eccentric shaft 15 for locking the rotary fork head 12 is provided on the chuck 11; the rotary fork head 12 is detachably connected to the first threaded tube 23.

[0024] Specifically, as Figure 2 shown, a groove 113 is formed on the fixed arm 111, and a flange 121 capable of being placed in the groove 113 is provided at the bottom of the rotary fork head 12. The flange 121 can rotate circumferentially along the groove 113, thereby driving the part connected above the rotary fork head 12 to rotate. A first limiting plate 14 and a second limiting plate 18 for limiting the flange 121 in the groove 113 are provided above the groove 113. The first limiting plate 14 and the second limiting plate 18 can be connected to the fixed arm 111 by bolts. A through hole (not marked in the figure) communicating with the groove 113 is formed on the first limiting plate 14. The eccentric shaft 15 passes through the through hole and is inserted into the groove 113. A rotating handle can be connected to the eccentric shaft 15. By rotating the rotating handle, the eccentric shaft 15 can lock the flange 121 to stop the flange 121 from rotating.

[0025] The connection between the rotary fork head 12 and the first threaded tube 23 can be achieved in various ways. As one way, a connecting piece 13 is connected below the first threaded tube 23. The connecting piece 13 can be connected to the first threaded tube 23 through a connecting pin 50. The connecting piece 13 has a protruding portion 131. Correspondingly, a slot 122 for inserting the protruding portion 131 is formed on the rotary fork head 12. The protruding portion 131 and the rotary fork head 12 are connected by a threaded connecting piece 19.

[0026] See Figure 3 and in combination with Figure 1 , Figure 3 shows the structure of the height fine-tuning mechanism 20. The height fine-tuning mechanism 20 is connected above the base 10. The height fine-tuning mechanism 20 can finely adjust the height of the support device. It includes a double-headed screw 21, a first threaded tube 23, and a second threaded tube 24. One end of the first threaded tube 23 is connected to the base 10, and the other end is threadedly connected to the lower end of the double-headed screw 21. One end of the second threaded tube 24 is threadedly connected to the upper end of the double-headed screw 21, and the other end is connected to the telescopic rod 30. Among them, the thread directions at both ends of the double-headed screw 21 are opposite. By rotating the double-headed screw 21, the height of the height fine-tuning mechanism 20 can be increased or decreased. Compared with a single-headed screw, the speed of increasing or decreasing the height of the height fine-tuning mechanism 20 will double. For example, the lower end of the double-headed screw 21 is provided with a left-handed thread, and the upper end is provided with a right-handed thread.

[0027] The rotation of the above-mentioned double-headed screw 21 can be achieved by a two-way ratchet mechanism 22. The two-way ratchet mechanism 22 is a prior art. The ratchet 221 of the two-way ratchet mechanism 22 is fixedly connected to the double-headed screw 21. By controlling the rotation of the ratchet 221 to drive the double-headed screw 21 to rotate counterclockwise or clockwise, the fine adjustment of the height of the support device can be realized.

[0028] As Figure 1 shown, the telescopic rod 30 is connected above the height fine adjustment mechanism 20. The telescopic rod 30 can be connected to the second threaded pipe 24 through a connecting pin 50. The telescopic rod 30 can achieve a large range of adjustment of the height of the support device. Specifically, the telescopic rod 30 includes a plurality of nested sleeves (not marked in the figure). Four sleeves are shown in the figure. The height of each sleeve does not exceed 2 meters for easy handling. A plurality of positioning holes 31 are provided on the sleeves. The plurality of sleeves are connected by inserting positioning pins 32 into the positioning holes 31. According to the requirements of railway lines with different structural heights, the positioning pins 32 can be inserted into different positioning holes 31 to adjust the height of the support device.

[0029] See Figure 4 and in combination with Figure 1 , Figure 4 shows the structure of the clamping mechanism 40. The clamping mechanism 40 is connected above the telescopic rod 30. The clamping mechanism 40 can also be connected to the sleeve of the telescopic rod 30 through a connecting pin 50. Specifically, the clamping mechanism 40 includes a first clamping part 41, a second clamping part 42, a screw 44 and a nut 45. A perforation 46 for the catenary to pass through is formed between the first clamping part 41 and the second clamping part 42. The second clamping part 42 is connected to the telescopic rod 30. One end of the first clamping part 41 and one end of the second clamping part 42 are hinged. The other end of the first clamping part 41 is provided with a first U-shaped opening extending along the length direction of the first clamping part 41. The other end of the second clamping part 42 is provided with a second U-shaped opening extending along the length direction of the second clamping part 42. A rotating shaft 43 is passed through the second U-shaped opening. One end of the screw 44 is hinged to the rotating shaft 43, and the other end passes upward through the first U-shaped opening and the first clamping part 41 and the second clamping part 42 are locked by the nut 45. The nut 45 is preferably a wing nut 45.

[0030] The usage method of the clamping mechanism 40 is as follows: Loosen the nut 45, rotate the screw 44 90 degrees around the rotating shaft 43 so that it extends along the extension direction of the second U-shaped opening. At this time, the first clamping part 41 can rotate relative to the second clamping part 42. Place the catenary on the second clamping part 42, then reset the first clamping part 41 and the screw 44 in sequence, and tighten the nut 45.

[0031] The supporting device of the present invention can achieve fine adjustment of height and has a fast adjustment speed by setting the height fine adjustment mechanism 20 with the double-headed screw 21 and the bi-directional ratchet mechanism 22. The supporting device is a pure mechanical structure, does not require electric drive, has high adjustment precision and good stability. At the same time, compared with the supporting devices of the prior art, the supporting device of the present invention is light in weight, can reach the height requirement of the catenary boom, and can complete the support of the boom without relying on a rail vehicle, thereby quickly replacing the porcelain insulator.

[0032] The above is only a schematic description of the present invention. Those skilled in the art should know that various improvements can be made to the present invention without departing from the working principle of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A support device, characterized in that, It includes a base, a height fine-tuning mechanism, a telescopic rod, and a clamping mechanism for clamping the catenary. A chuck capable of clamping the track is provided at the bottom of the base. The height fine-tuning mechanism includes a double-headed screw, a first threaded tube, and a second threaded tube. One end of the first threaded tube is connected to the base, and the other end is threadedly connected to the lower end of the double-headed screw. One end of the second threaded tube is threadedly connected to the upper end of the double-headed screw, and the other end is connected to the telescopic rod. The telescopic rod is connected to the clamping mechanism; the thread directions at both ends of the double-headed screw are opposite. The chuck includes a fixed arm, a rotating arm, and a lead screw. The fixed arm is mounted on the track. The rotating arm is hinged to the fixed arm. One end of the lead screw is connected to the rotating arm, and the other end is connected to a rotating handle. By rotating the rotating handle, the lead screw can push the rotating arm to rotate towards the track, so that the rotating arm and the fixed arm jointly clamp the track.

2. The support device according to claim 1, characterized in that, The lower end of the double-headed screw is provided with a left-handed thread, and the upper end is provided with a right-handed thread.

3. The support device according to claim 1, characterized in that, A rotating fork head is connected to the chuck. The rotating fork head can rotate relative to the chuck. An eccentric shaft for locking the rotating fork head is provided on the chuck; the rotating fork head is detachably connected to the first threaded tube.

4. The support device according to claim 3, characterized in that, A groove is formed in the chuck. A flange capable of being placed in the groove is provided at the bottom of the rotating fork head. The flange can rotate circumferentially along the groove. A first limiting plate and a second limiting plate for limiting the flange in the groove are provided above the groove. A through hole communicating with the groove is formed in the first limiting plate. The eccentric shaft passes through the through hole and inserts into the groove. By rotating the eccentric shaft, the eccentric shaft can lock the flange and make the flange stop rotating.

5. The support device according to claim 1, characterized in that, The height fine-tuning mechanism further includes a bidirectional ratchet mechanism capable of driving the double-headed screw to rotate. The ratchet of the bidirectional ratchet mechanism is fixedly connected to the double-headed screw.

6. The support device according to claim 1, characterized in that The telescopic rod includes a plurality of nested sleeves. A plurality of positioning holes are provided on the sleeves. The plurality of sleeves are connected by inserting positioning pins into the positioning holes.

7. The support device according to claim 1, characterized in that The clamping mechanism includes a first clamping portion, a second clamping portion, a screw, and a nut. A through hole for the catenary to pass through is formed between the first clamping portion and the second clamping portion. One end of the first clamping portion and one end of the second clamping portion are hinged. A first U-shaped opening extending along the length direction of the first clamping portion is formed at the other end of the first clamping portion. A second U-shaped opening extending along the length direction of the second clamping portion is formed at the other end of the second clamping portion. A rotating shaft is passed through the second U-shaped opening. One end of the screw is hinged to the rotating shaft, and the other end passes upward through the first U-shaped opening and the first clamping portion and the second clamping portion are locked by the nut.

8. The support device according to claim 7, wherein The nut is a wing nut.

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