CN211291970U

CN211291970U - Pantograph fatigue test bench

Info

Publication number: CN211291970U
Application number: CN201922383828.0U
Authority: CN
Inventors: 杨俭洪
Original assignee: Suzhou Zhongquanzhizao Automatic Technology Co ltd
Current assignee: Suzhou Zhongquanzhizao Automatic Technology Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-08-18
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a pantograph fatigue test platform, fixed mounting's high adjusting device and up-and-down motion device in the frame, the last fixed mounting of high adjusting device has crank device, crank device drive up-and-down motion device carries out the up-and-down motion, high adjusting device is including fixing the sharp slip table that sets up perpendicularly on the frame curb plate, install the support that sets up perpendicularly with it on the sharp slip table, fixed mounting has crank device on the support, the support drives through high actuating mechanism and carries out the altitude mixture control. In this way, the utility model discloses can realize safety, stability among the pantograph fatigue test process, mechanical structure long service life to can immediate record and report to the police, can automatic shutdown when satisfying the requirement.

Description

Pantograph fatigue test bench

Technical Field

The utility model relates to an intelligence field of making especially relates to a pantograph fatigue test platform.

Background

The pantograph is an electric device for an electric traction locomotive to obtain electric energy from a contact net and is arranged on the roof of the locomotive or a bullet train. The pantograph can be divided into a single-arm pantograph and a double-arm pantograph, and comprises a carbon sliding plate, an upper frame, a lower arm rod (a lower frame for the double-arm pantograph), a bottom frame, a pantograph lifting spring, a transmission cylinder, a supporting insulator and the like. In order to ensure the smooth flow of the traction current, a certain contact pressure must be provided between the pantograph and the contact line, and the static contact pressure is generally 70N or 90N.

With the continuous acceleration of trains, the running environment of the train is worse and worse, the vibration between the pantograph and the contact network becomes stronger, the random vibration load borne by the pantograph is increased rapidly, the problem of pantograph vibration fatigue which is easy to neglect in the past is increasingly revealed, and therefore the problem of pantograph vibration fatigue is more and more widely regarded. In order to predict the random vibration fatigue life of the pantograph more accurately and efficiently, the research on the random vibration fatigue test of the pantograph is of great significance. The pantograph control system has the advantages that safe and reliable operation of the vehicle is guaranteed, accidents are reduced, meanwhile, the design level of the pantograph is improved, the service life is prolonged, the competitiveness of high-speed vehicles in the international market in China is enhanced, the pantograph control system has profound theoretical significance, and the pantograph control system also has important application value and economic benefit.

At present, pantograph test beds commonly equipped in railway systems in China mostly belong to a human-type or semi-automatic type, and the test operation is complicated, and the fatigue performance of a pantograph cannot be quickly, accurately and conveniently tested. The existing fatigue test bed has unreasonable structure, can not do reciprocating motion for 200 ten thousand times, and is lack of automatic control, so that when a fault occurs or a tested product is damaged in the test process, the existing fatigue test bed cannot record and warn immediately.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a pantograph fatigue test platform, can realize safety, stability among the pantograph fatigue test process, mechanical structure long service life to can immediate recording and report to the police, can automatic shutdown when satisfying the requirement.

In order to solve the technical problem, the utility model discloses a technical scheme be: the pantograph fatigue test bed comprises a height adjusting device and an up-and-down movement device which are fixedly mounted on a rack, wherein a crankshaft device is fixedly mounted on the height adjusting device and drives the up-and-down movement device to move up and down.

Further, height adjustment device is including fixing the sharp slip table of perpendicular setting on the frame curb plate, install the support that sets up perpendicularly with it on the sharp slip table, fixed mounting has crankshaft device on the support, the support drives through high actuating mechanism and carries out height adjustment.

The crankshaft device comprises a crankshaft driving mechanism fixed on a connecting plate fixed with the support, a bearing seat is fixedly installed on the connecting plate, a rotating shaft driven by the crankshaft driving mechanism is installed in the bearing seat, and a curved rod fixed through a crankshaft disc is installed on the rotating shaft in the bearing seat.

Further, the up-and-down movement device comprises a bottom plate, a set of symmetrical linear guide rails is arranged on the bottom plate, a driving plate is installed on a sliding block of the set of linear guide rails, a pressing component and a driving rod are arranged on the front face and the rear face of the driving plate respectively, a limiting groove is formed in the outer side plate of the rack, the driving rod is located in the limiting groove, the driving rod is connected with the curved rod through a connecting rod, and a sensor is installed on the pressing component.

Further, the height driving mechanism comprises a height adjusting servo motor fixed in the rack, and the height adjusting servo motor drives the support to adjust the height through a height adjusting screw rod.

Further, the crankshaft driving mechanism comprises a crankshaft motor, and the crankshaft motor reduction gearbox drives the rotating shaft to further drive the crank rod to reciprocate.

Furthermore, one end of the connecting rod is sleeved on the driving rod, the connecting rod rotates around the central axis of the driving rod, and the other end of the connecting rod is in pin joint with the curved rod.

Further, the sensor is composed of a pressure sensor and a displacement sensor.

Further, the crankshaft motor is a variable frequency motor controlled by a PLC.

The utility model has the advantages that: the utility model relates to a pantograph fatigue test platform can realize safety, stability among the pantograph fatigue test process, and mechanical structure long service life to can immediate record and report to the police, can automatic shutdown when satisfying the requirement.

Drawings

Fig. 1 is a schematic structural view of a pantograph fatigue test stand of the present invention;

fig. 2 is a schematic view of an internal structure of a pantograph fatigue test stand according to the present invention;

fig. 3 is a schematic structural diagram of a crankshaft device of the pantograph fatigue test stand of the present invention.

1. A frame; 2. a linear sliding table; 3. a support; 4. a height adjustment servo motor; 5. a height adjusting screw rod; 6. a connecting plate; 7. a bearing seat; 8. a rotating shaft; 9. a crank disk; 10. a curved bar; 11. a crankshaft motor; 12. a crankshaft motor reduction gearbox; 13. a base plate; 14. a linear guide rail; 15. a drive plate; 16. pressing the assembly; 17. a drive rod; 18. a limiting groove; 19. a connecting rod; 20. a sensor.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to make clear and definite definitions of the protection scope of the present invention.

Referring to fig. 1 to 3, an embodiment of the present invention includes: the utility model provides a pantograph fatigue test platform, includes height adjusting device and the up-and-down motion device of fixed mounting in the frame, the last fixed mounting of height adjusting device has the bent axle device, the bent axle device drive up-and-down motion device carries out the up-and-down motion.

The height adjusting device comprises a straight line sliding table 2 which is fixed on a side plate of the frame 1 and is vertically arranged, a support 3 which is vertically arranged with the straight line sliding table 2 is installed on the straight line sliding table 2, a crankshaft device is fixedly installed on the support 3, and the support 3 is driven by a height driving mechanism to adjust the height. The height driving mechanism comprises a height adjusting servo motor 4 fixed in the rack 1, and the height adjusting servo motor 4 drives the support 3 to adjust the height through a height adjusting screw rod 5.

The crankshaft device comprises a crankshaft driving mechanism fixed on a connecting plate 6 fixed with the support 3, a bearing seat 7 is fixedly installed on the connecting plate 6, a rotating shaft 8 driven by the crankshaft driving mechanism is installed in the bearing seat 7, and a curved rod 10 fixed through a crankshaft disk 9 is installed on the rotating shaft 8 in the bearing seat 7. The crankshaft driving mechanism comprises a crankshaft motor 11, and a crankshaft motor reduction box 12 drives a rotating shaft 8 so as to drive a crank rod 10 to reciprocate. The crankshaft motor 11 is a variable frequency motor controlled by a PLC.

The up-and-down movement device comprises a bottom plate 13, a set of symmetrical linear guide rails 14 are arranged on the bottom plate 13, a drive plate 15 is installed on a sliding block of the linear guide rails 14, a pressing component 16 and a drive rod 17 are respectively arranged on the front face and the rear face of the drive plate 15, a limiting groove 18 is formed in the outer side plate of the rack 1, the drive rod 17 is located in the limiting groove 18, the drive rod 17 is connected with the curved rod 10 through a connecting rod 19, and a sensor is installed on the pressing component 16. One end of the connecting rod 19 is sleeved on the driving rod 17, the connecting rod 19 rotates around the central axis of the driving rod 17, and the other end of the connecting rod 17 is in pin joint with the curved rod 10.

Further, the sensor 20 is composed of a pressure sensor and a displacement sensor.

Further, the crankshaft motor 11 is a variable frequency motor controlled by a PLC.

The utility model relates to a pantograph fatigue test platform through the output of PLC control converter, changes inverter motor's rotational speed, reaches the purpose of curved bar reciprocating motion frequency. The reciprocating motion frequency of the crank rod can be monitored and trimmed through information fed back by the pressure sensor and the displacement sensor, so that the frequency deviation is controlled within +/-0.2 Hz. And adjusting the amplitude of the reciprocating motion of the crank rod according to the positions of the shaft holes with different diameters on the adjusting crank disk. The reciprocating motion is converted from the rotating motion of the variable frequency motor, and the variable frequency motor can work at a uniform speed at a certain rotating speed, so that the single continuous normal work for more than or equal to 200 ten thousand times can be completely ensured. Through the information fed back by the pressure sensor and the displacement sensor and the information of the travel sensor, the continuous work can be counted in multiple ways, and the purpose of counting without deviation is achieved. The test can be controlled by accumulating the reciprocating motion times of the variable frequency motor, and the test can also be monitored by information fed back by the pressure sensor and the displacement sensor, if abnormal conditions occur, the test is automatically stopped, the information is analyzed and processed by the PC, and a report is generated. The mechanism can bear the load of more than 50 Kg.

Crankshaft, connecting rod: the crankshaft connecting rod assembly converts the rotary motion driven by the frequency converter motor into linear reciprocating motion. According to the position of the shaft holes with different diameters on the crankshaft disk, the reciprocating motion with different strokes is realized. Because the bearings are connected with the balls in the moving process, the abrasion can be ignored, and the service life is prolonged.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pantograph fatigue test stand is characterized by comprising a height adjusting device and an up-and-down movement device which are fixedly mounted on a rack, wherein a crankshaft device is fixedly mounted on the height adjusting device and drives the up-and-down movement device to move up and down.

2. The pantograph fatigue test stand of claim 1, wherein: the height adjusting device comprises a straight line sliding table which is fixed on a side plate of the frame and vertically arranged, a support which is vertically arranged with the straight line sliding table is installed on the straight line sliding table, a crankshaft device is fixedly installed on the support, and the support is driven by a height driving mechanism to be adjusted in height.

3. The pantograph fatigue test stand of claim 1, wherein: the crankshaft device comprises a crankshaft driving mechanism fixed on a connecting plate fixed with the support, a bearing seat is fixedly installed on the connecting plate, a rotating shaft driven by the crankshaft driving mechanism is installed in the bearing seat, and a curved rod fixed through a crankshaft disc is installed on the rotating shaft in the bearing seat.

4. The pantograph fatigue test stand of claim 1, wherein: the up-and-down movement device comprises a bottom plate, a set of symmetrical linear guide rails is arranged on the bottom plate, a driving plate is installed on a sliding block of the set of linear guide rails, a pressing component and a driving rod are arranged on the front face and the rear face of the driving plate respectively, a limiting groove is formed in the outer side plate of the rack, the driving rod is located in the limiting groove, the driving rod is connected with a curved rod through a connecting rod, and a sensor is installed on the pressing component.

5. The pantograph fatigue test stand of claim 2, wherein: the height driving mechanism comprises a height adjusting servo motor fixed in the rack, and the height adjusting servo motor drives the support to adjust the height through a height adjusting screw rod.

6. The pantograph fatigue test stand of claim 3, wherein: the crankshaft driving mechanism comprises a crankshaft motor, and the crankshaft motor reduction gearbox drives the rotating shaft to further drive the crank rod to reciprocate.

7. The pantograph fatigue test stand of claim 4, wherein: one end of the connecting rod is sleeved on the driving rod, the connecting rod rotates around the central axis of the driving rod, and the other end of the connecting rod is in pin joint with the curved rod.

8. The pantograph fatigue test stand of claim 4, wherein: the sensor is composed of a pressure sensor and a displacement sensor.

9. The pantograph fatigue test stand of claim 6, wherein: the crankshaft motor is a variable frequency motor controlled by a PLC.