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CN-115683513-B - Vibration table switching device for fatigue test and fatigue test workbench

CN115683513BCN 115683513 BCN115683513 BCN 115683513BCN-115683513-B

Abstract

The invention discloses a vibrating table switching device for fatigue test and a fatigue test workbench. The vibrating table switching device mainly comprises a push rod, a switching head, a fastening mechanism and a switching mechanism, wherein a screw hole is formed in the end face of one end of the push rod, a first connecting portion with external threads is arranged at one end of the switching head, the first connecting portion is fastened in the screw hole in the push rod, a second connecting portion with smaller width is arranged at the other end of the switching head, and the fastening mechanism is fixed on the second connecting portion of the switching head. During test, the fixed end of the sample is fixed on the fixed table by means of a clamp, the swinging end of the sample is fixed with the connector of the vibrating table switching device, and the other end of the push rod is fixed with the actuator cylinder of the vibrating table. The vibrating table switching device has the advantages of simple structure and convenience in operation, and a multi-station high-efficiency test can be performed on a fatigue test workbench constructed by using the vibrating table switching device.

Inventors

  • PAN ZHIFANG
  • SHI CHAOCHENG

Assignees

  • 上海航空材料结构检测股份有限公司

Dates

Publication Date
20260505
Application Date
20221028

Claims (8)

  1. 1. A vibrating table transfer device for fatigue test, characterized by comprising: the end face of one end of the push rod is provided with a screw hole; One end of the adapter is provided with a first connecting part with external threads, the first connecting part is fastened in a screw hole on the push rod, and the other end of the adapter is provided with a second connecting part with smaller width; the fastening mechanism is fixed on the second connecting part of the adapter; The fastening mechanism comprises a nut and a bolt, the second connecting part of the adapter is provided with external threads for the nut to be screwed and fixed, the second connecting part is provided with a first pin hole, the second connecting part of the adapter is also sleeved with a collar, the collar is provided with a second pin hole, and the first pin hole and the second pin hole are used for the bolt to penetrate; The vibrating table switching device is further provided with a connecting plate, a through second connecting hole is formed in the connecting plate, a limiting part is arranged at the rear end of the push rod, the width D 1 of the limiting part is larger than the width D 2 of the second connecting hole, a lock nut is sleeved at the rear part of the push rod through screw thread fit, and the lock nut is arranged at the rear part of the push rod, wherein: The second connecting hole of the connecting plate is sleeved on the outer side of the push rod, and the limiting part and the locking nut of the push rod are respectively clamped on two sides of the connecting plate to fix the push rod and the connecting plate together; a slot for accommodating the limiting part of the push rod is formed in the outer side edge of the second connecting hole on the connecting plate; the length D 3 of the second connecting hole on the connecting plate is larger than the width D 2 of the second connecting hole.
  2. 2. The vibration table switching device according to claim 1, wherein the second connecting portion of the switching head is provided with external threads, and the fastening mechanism is a nut and is detachably fixed to the second connecting portion of the switching head by means of a screw-fit.
  3. 3. The vibration table adapting device according to claim 1, wherein a first pin hole is provided on the second connecting portion of the adapter, and the fastening mechanism is a bolt and is inserted into the first pin hole.
  4. 4. A vibrating table transfer device according to claim 3, wherein a collar is sleeved on the second connecting portion of the adapter, a second pin hole is formed in the collar, and the bolt is simultaneously inserted into the second pin hole in the collar and the first pin hole in the second connecting portion.
  5. 5. The vibration table switching device according to claim 1, wherein the connecting plate is further provided with a plurality of first fixing holes.
  6. 6. The vibration table switching device according to claim 1, wherein a sensor is further provided on the push rod for monitoring a change in force.
  7. 7. The fatigue test workbench is characterized by comprising a first platform, a plurality of clamps, a mounting plate and a plurality of vibrating table switching devices according to any one of claims 1-6, wherein: The first platform is provided with a plurality of second fixing holes for detachably fixing the plurality of clamps on the first platform by means of fixing pieces; The mounting plate is provided with a plurality of third fixing holes for fixing one end of the vibrating table switching device; the plurality of clamps and the plurality of vibrating table switching devices are used for clamping a plurality of samples.
  8. 8. The fatigue test bench according to claim 7, wherein the lower side of the first platform is further provided with a second platform, the first platform is provided with a plurality of fourth fixing holes, the second platform is provided with a plurality of fifth fixing holes, and the first platform and the second platform are detachably fixed together by means of fixing members sequentially passing through the fourth fixing holes on the first platform and the fifth fixing holes on the second platform.

Description

Vibration table switching device for fatigue test and fatigue test workbench Technical Field The invention belongs to the field of fatigue tests, and particularly relates to a vibrating table switching device for a fatigue test and a fatigue test workbench. Background The most reliable method is to test and check the fatigue characteristics of the material except for the fatigue characteristics of the material obtained through theoretical calculation and simulation analysis. The conventional test equipment is an electrohydraulic servo fatigue tester, but has two defects, namely, the test frequency is low, the test period is long because of being generally lower than 30Hz, and the fatigue test can be generally carried out on a single sample at one time and cannot be carried out on a plurality of samples at the same time. Compared with a common electrohydraulic servo fatigue testing machine, the working frequency of the vibration table is higher, so that the efficiency of fatigue test by using the vibration table is higher. When the electrohydraulic servo fatigue testing machine is used for testing, two ends of a sample are fixed on the electrohydraulic servo fatigue testing machine by using a conventional clamp. However, when the fatigue test is performed using the vibration table, one end of the sample, i.e., the fixed end, needs to be fixed to the fixed table by means of a jig, and the other end of the sample, i.e., the swing end, needs to be in driving connection with the actuator cylinder of the vibration table. Since the swing end of the sample cannot be directly connected to the actuator of the vibrating table, an adapter device is required that fixedly connects the swing end of the sample to the actuator of the vibrating table. Disclosure of Invention In order to solve the problem of switching between a sample and an existing vibrating table, a first object of the present invention is to provide a vibrating table switching device for fatigue test. A second object of the present invention is to provide a fatigue test bench. The technical scheme adopted for solving the technical problems is as follows: A vibrating table transfer device for fatigue testing, comprising: the end face of one end of the push rod is provided with a screw hole; One end of the adapter is provided with a first connecting part with external threads, the first connecting part is fastened in a screw hole on the push rod, and the other end of the adapter is provided with a second connecting part with smaller width; the fastening mechanism is fixed on the second connecting part of the adapter. According to a preferred embodiment, the second connection part of the adapter is provided with an external thread, and the fastening means is a nut and is detachably fastened to the second connection part of the adapter by means of a threaded fit. According to a preferred embodiment, the second connecting portion of the adapter is provided with a first pin hole, and the fastening mechanism is a bolt and is inserted into the first pin hole. Further, a collar is sleeved on the second connecting portion of the adapter, a second pin hole is formed in the collar, and the bolt is simultaneously inserted into the second pin hole in the collar and the first pin hole in the second connecting portion. Further, the vibration table switching device is also provided with a connecting plate, a through second connecting hole is formed in the connecting plate, a limiting part is arranged at the rear end of the push rod, the width D 1 of the limiting part is larger than the width D 2 of the second connecting hole, a lock nut is sleeved at the rear part of the push rod by means of threaded fit, and the lock nut is arranged at the rear part of the push rod, wherein: The second connecting hole of the connecting plate is sleeved on the outer side of the push rod, and the limiting part and the locking nut of the push rod are respectively clamped on two sides of the connecting plate to fix the push rod and the connecting plate together; the connecting plate is also provided with a plurality of first fixing holes. According to a preferred embodiment, the length D 3 of the second connection hole in the connection plate is greater than its width D 2. Further, a slot for accommodating the limiting part of the push rod is arranged at the outer side edge of the second connecting hole on the connecting plate. Further, a sensor is further arranged on the push rod and used for monitoring the change of force. The utility model provides a fatigue test workstation, includes first platform, a plurality of anchor clamps, mounting panel and a plurality of above-mentioned shaking table switching device, wherein: The first platform is provided with a plurality of second fixing holes for detachably fixing the plurality of clamps on the first platform by means of fixing pieces; The mounting plate is provided with a plurality of third fixing holes for fixing one end of the vibrating ta