Telescopic mechanism in telescopic hitch buffer device for use in high speed electric multiple units

Abstract

The patent was disclosed a telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains. The telescopic mechanism comprises a compression rod (2) located inside a movable housing (1) of said hitch buffer device, one end of said compression rod (2) being connected to the movable housing (1), and a bearing connector (3) encasing the compression rod (2). A guiding barrel (4) is fixedly mounted outside the bearing connector (3). An extension/retraction driving mechanism (9) is provided between the guiding barrel (4) and the movable housing (1). A locking mechanism comprises protrusions (6) distributed at the other end of the compression rod (2), and grooves (7) in engagement with protrusions (6) on the inner wall of the bearing connector (3). One end of the compression rod (2) is connected to the movable housing (1) via a torsion spring (5), keeping the compression rod (2) and the bearing connector (3) in a locked state; an unlocking driving mechanism is provided on the outside of the movable housing (1), and is in an unlocked state when the protrusions (6) face the grooves (7), in which case, the movable housing (1) and the bearing connector (3) can slide relative to each other. Since the extension/retraction driving mechanism (9) is provided inside the movable housing (1), volume is reduced, good protection is provided for respective components, and the telescopic mechanism and the locking mechanism are relatively simple in structure, labor-saving, reliable in operation, and can bear relatively large loads.

Claims

1. A telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains, wherein the telescopic mechanism comprises a compression rod (2) located inside a movable housing (1) of said hitch buffer device, one end of said compression rod (2) being connected to the movable housing (1), and a bearing connector (3) encasing the compression rod (2); a guiding barrel (4) is fixedly mounted outside the bearing connector (3); an extension/retraction driving mechanism (9) is provided between the guiding barrel (4) and the movable housing (1); one end of the compression rod (2) is connected to the movable housing (1) via a torsion spring (5), for keeping the compression rod (2) and the bearing connector (3) in a locked state; a locking mechanism comprises protrusions (6) distributed at another end of the compression rod (2), and grooves (7) in engagement with the protrusions (6) on the inner wall of the bearing connector (3); the locking mechanism is in an unlocked state when the protrusions (6) face the grooves (7), both the compression rod (2) and the bearing connector (3) can slide relative to each other; an unlocking driving mechanism (8) is provided on the outside of the movable housing (1).

2. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 1, wherein the telescopic mechanism comprising a telescopic tooth gear (10) positioned on the movable housing (1), and a telescopic gear rack (11) fixed to the guiding barrel (4); wherein the telescopic tooth gear (10) and the telescopic gear rack (11) are meshed.

3. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 2, wherein the bearing connector (3) is provided with two limit stops (12) at the grooves (7).

4. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 1, wherein the unlocking driving mechanism comprises a steel wire rope fixed to the compression rod (2) and driving the compression rod (2) to rotate.

5. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 4, wherein the bearing connector (3) is provided with two limit stops (12) at the grooves (7).

6. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 1, wherein the protrusions (6) and the grooves (7) are distributed equidistantly.

7. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 6, wherein the bearing connector (3) is provided with two limit stops (12) at the grooves (7).

8. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 1, wherein all of the protrusions (6) are of the same shape.

9. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 8, wherein the bearing connector (3) is provided with two limit stops (12) at the grooves (7).

10. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 1, wherein all of the grooves (7) are of the same shape.

11. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 10, wherein the bearing connector (3) is provided with two limit stops (12) at the grooves (7).

12. The telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains according to claim 1, wherein the bearing connector (3) is provided with two limit stops (12) at the grooves (7).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a section view of the invention.

(2) FIG. 2 is an outside view of the invention.

(3) FIG. 3 is a structure diagram of the compression rod in the invention.

(4) FIG. 4 is a side view of FIG. 3.

(5) FIG. 5 is a structure diagram of the bearing connector in the invention.

(6) FIG. 6 is a side view of FIG. 5.

BEST EMBODIMENTS OF THE INVENTION

(7) Description of embodiments of the invention is made in combination with the accompanying drawings.

(8) Disclosed is a telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains. The telescopic mechanism comprises a compression rod 2 located inside a movable housing 1 of said hitch buffer device, one end of said compression rod 2 being connected to the movable housing 1, and a bearing connector 3 encasing the compression rod 2; a guiding barrel 4 is fixedly mounted outside the bearing connector 3; an extension/retraction driving mechanism 9 is provided between the guiding barrel 4 and the movable housing 1, and the extension/retraction driving mechanism comprises a telescopic tooth gear 10 positioned on the movable housing 1 and a telescopic gear rack 11 fixed to the guiding barrel 4; one end of the compression rod 2 is connected to the movable housing 1 via a torsion spring 5, keeping the compression rod 2 and the bearing connector 3 in a locked state; a locking mechanism comprises protrusions 6 distributed at the other end of the compression rod 2, and grooves 7 in engagement with protrusions 6 on the inner wall of the bearing connector 3; the protrusions 6 and grooves 7 are distributed equidistantly, and the protrusions 6 and the grooves 7 are of the same shape. It is in an unlocked state when the protrusions 6 face the grooves 7, both of which can slide relative to each other; an unlocking driving mechanism 8 is provided on the outside of the movable housing 1; the unlocking driving mechanism comprising a steel wire rope fixed to the compression rod 2 and driving the compression rod 2 to rotate. The bearing connector 3 is provided with two limit stops 12 at the grooves 7.

(9) The working process of the invention is as below:

(10) From the retraction state to the stretching state:

(11) The unlocking driving mechanism 8 actuates and drives the compression rod 2 to rotate counterclockwise at a preset angle until the limit stops 12 are unlocked, at this moment, both the compression rod 2 and the bearing connector 3 are in an unlocked state.fwdarw.the extension/retraction driving mechanism 9 starts and drives the compression rod 2 to move ahead until the whole set of extension/retraction driving mechanism stretches out, in this process the action of the unlocking driving mechanism 8 is released.fwdarw.the torsion spring 5 actuates and drives the compression rod 2 to rotate clockwise to the limit stops 12 until the extension/retraction driving mechanism 9 stretches out and is automatically locked, and then the action of the extension/retraction driving mechanism 9 is released, at this moment, both the compression rod 2 and the bearing connector 3 enter into a locked state.fwdarw.the process of stretching is completed.

(12) From the stretching state to the retraction state:

(13) The unlocking driving mechanism 8 actuates and drives the compression rod 2 to rotate counterclockwise at a preset angle until the limit stops 12 are unlocked, at this moment, both the compression rod 2 and the bearing connector 3 are in an unlocked state.fwdarw.the extension/retraction driving mechanism 9 starts and drives the compression rod 2 to move back until the whole set of extension/retraction driving mechanism retracts, in this process the action of the unlocking driving mechanism 8 is released.fwdarw.the torsion spring 5 actuates and drives the compression rod 2 to rotate clockwise to the limit stops 12 until the extension/retraction driving mechanism 9 retracts and is automatically locked, and then the action of the extension/retraction driving mechanism 9 is released, at this moment, both the compression rod 2 and the bearing connector 3 enter into a locked state.fwdarw.the process of retraction is completed.