CN115560059A

CN115560059A - Driving device for point switch

Info

Publication number: CN115560059A
Application number: CN202211293973.XA
Authority: CN
Inventors: 王小毅; 张树东; 夏仲群
Original assignee: Tianjin Railway Signal Co Ltd
Current assignee: Tianjin Railway Signal Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-01-03

Abstract

The invention discloses a driving device for a point switch, which comprises a driving box and is characterized in that: the power assembly is at least arranged in the driving box and comprises a power member, the output end of the power member is connected with a worm gear reducer, a rocker arm is fixedly arranged on the output shaft of the worm gear reducer, and a closed guide groove is formed in the lower end of the rocker arm; the actuating lever is horizontally arranged at the position corresponding to the rocker arm along the direction perpendicular to the output shaft, the two ends of the actuating lever respectively extend out of the outer side of the box body, the actuating lever is provided with a driving avoiding groove, a pin shaft hole penetrating through the driving avoiding groove is formed in the actuating lever parallel to the direction of the output shaft, a pin shaft is arranged in the pin shaft hole, and the pin shaft is penetrated in a driving groove of the rocker arm.

Description

Driving device for point switch

Technical Field

The invention belongs to the technical field of point switches, and particularly relates to a driving device for a point switch.

Background

As is well known, a point switch is an important signal base device for reliably switching the position of a point, changing the opening direction of the point, locking a point tongue, and reflecting the position of the point, and can ensure the driving safety, improve the transportation efficiency, and improve the labor intensity of the driving personnel.

In order to realize turnout conversion, one end of an action rod of a point switch is connected with a turnout conversion driving rod through a connecting rod, the driving mode of the action rod in the prior art is generally manual, hydraulic driving or rack pair driving, and the manual driving mode among the three driving modes is more laborious and has poorer safety, so that the action rod is gradually replaced at present; the hydraulic drive mode is adopted, a hydraulic station needs to be configured on site or a hydraulic pipeline is connected with a hydraulic cylinder, the construction cost is high, the hydraulic pipeline needs to be frequently overhauled during operation and maintenance, and once the hydraulic pipeline has a leakage safety accident due to the fact that the hydraulic cylinder does not have self-locking capacity; the rack pair driving does not have self-locking capacity at first and has abnormal sound.

Therefore, the invention designs the driving device for the switch machine, which has simple structure, low maintenance cost, high universality and high safety.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a driving device for a switch machine.

The invention is realized in this way, a driving device for a switch machine, comprising a driving box, characterized in that: the power assembly is at least arranged in the driving box and comprises a power component, the output end of the power component is connected with a worm gear reducer, a rocker arm is fixedly arranged on the output shaft of the worm gear reducer, and a closed guide groove is formed in the lower end of the rocker arm; the actuating lever is horizontally arranged at the position corresponding to the rocker arm along the direction perpendicular to the output shaft, the two ends of the actuating lever respectively extend out of the outer side of the box body, the actuating lever is provided with a driving avoiding groove, a pin shaft hole penetrating through the driving avoiding groove is formed in the actuating lever parallel to the direction of the output shaft, a pin shaft is arranged in the pin shaft hole, and the pin shaft is penetrated in a driving groove of the rocker arm.

Preferably, a bearing is mounted on the pin shaft in the guide groove of the rocker arm.

Preferably, the rocker arm is connected with the output shaft through a flat key or a spline.

Preferably, the side wall of the drive box is provided with a mounting lug.

Preferably, a sealing ring is mounted at the position of the action rod mounting hole on the box body through a sealing gland.

The invention has the advantages and the technical effects that: compared with the prior art, the worm gear pair has the advantages of simple structure, low maintenance cost, large transmission torsion due to the adoption of the worm gear pair, and self-locking function, so that the safety of the worm gear pair is higher in actual use.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of a rocker arm and actuating lever mounting arrangement;

FIG. 4 is a state diagram of the present invention in use;

fig. 5 is a top view of fig. 4.

In the figure, 1, a driving box; 1-1, a box body; 1-2, a box cover; 1-3, lugs; 2. a power assembly; 2-1, a power component; 2-1, a worm gear reducer; 2-10, output shaft; 3. a rocker arm; 3-1, a guide groove; 4. an action lever; 4-1, driving an avoidance groove; 4-2, pin shaft holes; 4-3, a pin shaft; 5. a bearing; 6. a key; 7. a sealing gland; 8. a seal ring; 9. a pull rod; 10. the switch changes the actuating lever.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 5, a driving device for a point switch comprises a driving box 1, wherein the driving box 1 is a sealed box body and mainly comprises a box body 1-1 and a box cover 1-2, and the box cover is hinged to the box body; the driving box is at least internally provided with a power assembly 2, the power assembly comprises a power component, the power component is a motor and a speed reducer (not shown in the figure), the speed reducer connected with the motor is used for primary speed reduction to reduce the speed of the motor and increase the output torque, the output end of the power component is connected with a worm and gear speed reducer 2-1, and the worm and gear speed reducer 2-1 is used for final output speed reduction and is used as power output; the installation mode of the motor and the speed reducer which form the power component can be adjusted according to actual needs, for example, the motor and the speed reducer can be horizontally installed in a box body, and can also be vertically installed in the box body, so that the output end of the speed reducer is connected with the input end of a worm gear speed reducer; a rocker arm 3 is fixedly mounted on an output shaft 2-10 of the worm gear reducer, a closed guide groove 3-1 is formed in the lower end of the rocker arm, and the guide groove is of a long groove structure; the action rod 4 is horizontally arranged at the position corresponding to the rocker arm along the direction vertical to the output shaft, and two ends of the action rod respectively extend out of the outer side of the box body, so that the action rod is not limited by left and right installation positions and has universality. The action rod is provided with a driving avoidance groove 4-1 which is a long groove and meets the requirement of bidirectional avoidance of the swing of the action rod; and a pin shaft hole 4-2 penetrating through the driving avoiding groove is formed in the action rod in the direction parallel to the output shaft, a pin shaft 4-3 is installed in the pin shaft hole, and the pin shaft is installed in the driving groove of the rocker arm in a penetrating mode.

The working principle of the invention is as follows: when turnout conversion is needed, a motor of a power component obtains a starting signal, after the turnout conversion is started, the motor is firstly connected with a primary speed reducer for speed reduction, meanwhile, the output torque is increased, a worm gear and worm speed reducer is driven to rotate, an output shaft subjected to secondary speed reduction through a worm gear and worm pair drives a rocker arm to swing, the rocker arm drives an action rod to do linear motion, and the rocker arm drives a turnout conversion driving rod 10 through a pull rod 9 to realize turnout conversion; when reverse conversion is needed, the power component reverses to realize conversion of the reverse turnout.

Preferably, the bearing 5 is arranged on the pin shaft in the guide groove of the rocker arm, so that friction is reduced, the service life of the pin shaft is prolonged, and noise is low.

Preferably, the rocker arm is connected with the output shaft through a key 6 or a spline, and has the characteristic of large transmission torsion.

Preferably, the side wall of the drive box is provided with mounting lugs 1-3 which are externally arranged to facilitate mounting and dismounting, and the drive box is not limited to the mounting lugs and can be mounted with a track foundation inside the drive box.

Preferably, the box body is provided with a sealing ring 8 at the position of the action rod mounting hole through a sealing gland 7, so that the interior of the driving box is not influenced by dust and rainwater, and the service life of the power component is prolonged.

The invention has the advantages and technical effects that: compared with the prior art, the self-locking mechanism has the advantages that the structure is simple, the maintenance cost is low, the worm gear pair has large transmission torsion and a self-locking function, and the safety is higher in practical use.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A driving device for a switch machine comprises a driving box, and is characterized in that: the power assembly is at least arranged in the driving box and comprises a power component, the output end of the power component is connected with a worm gear reducer, a rocker arm is fixedly arranged on the output shaft of the worm gear reducer, and a closed guide groove is formed in the lower end of the rocker arm; the actuating lever is horizontally arranged at the position corresponding to the rocker arm along the direction perpendicular to the output shaft, the two ends of the actuating lever respectively extend out of the outer side of the box body, the actuating lever is provided with a driving avoiding groove, a pin shaft hole penetrating through the driving avoiding groove is formed in the actuating lever parallel to the direction of the output shaft, a pin shaft is arranged in the pin shaft hole, and the pin shaft is penetrated in a driving groove of the rocker arm.

2. The drive device for a switch machine according to claim 1, wherein: and a bearing is arranged on the pin shaft in the guide groove of the rocker arm.

3. The drive device for a switch machine according to claim 1, wherein: the rocker arm is connected with the output shaft through a flat key or a spline.

4. The drive device for a switch machine according to claim 1, wherein: and the side wall of the driving box is provided with a mounting lug.

5. The drive device for a switch machine according to claim 1, wherein: and a sealing ring is arranged at the position of the action rod mounting hole on the box body through a sealing gland.