CN210834126U

CN210834126U - Fatigue testing device

Info

Publication number: CN210834126U
Application number: CN201921982319.3U
Authority: CN
Inventors: 刘占奎; 王世军; 熊艳; 吴玉霞
Original assignee: Suzhou Leduo Machinery Co ltd
Current assignee: Suzhou Leduo Machinery Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-06-23
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a fatigue testing device, which is used for testing the fatigue strength of a test piece, wherein the test piece comprises two support rods and a connecting piece, the connecting piece is used for connecting the two adjacent support rods, the fatigue testing device comprises a machine table, a frame and a first testing device, and the frame is arranged on the upper surface of the machine table; the first testing device comprises a testing platform, a push rod, a pressure sensor, a first linkage piece and a first screw rod, wherein one side of the testing platform is hinged with the upper surface of the machine table, the other side of the testing platform is rotatably connected with the push rod, and the other end of the push rod is hinged with the first linkage piece; the first screw is arranged on the machine table and is in threaded fit with the first linkage piece; the pressure sensor is arranged on the rack through the first driving piece, and the first driving piece is used for pushing the pressure sensor to press the test piece. The utility model discloses can test the performance of spare part to guarantee its security in life.

Description

Fatigue testing device

Technical Field

The utility model relates to a testing arrangement field, concretely relates to fatigue testing device.

Background

With the continuous popularization and promotion of electric automobiles, the requirements on the quality, the use experience and the like of the electric automobiles are continuously increased. In the using process, parts of the electric automobile need to bear various forces and torques, so that the parts need to have better strength to ensure that the parts cannot break in the using process. In order to ensure that the strength of the component meets the load-bearing requirement, the component needs to be subjected to a fatigue test in the design stage so as to ensure that the component can guarantee the performance within the service life.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a fatigue test device, its performance that can test spare part to guarantee its security in life.

In order to solve the technical problem, the utility model provides a fatigue testing device for testing the fatigue strength of a test piece, the test piece comprises a support rod and a connecting piece, the connecting piece is used for connecting two adjacent support rods, the fatigue testing device comprises a machine table, a frame and a first testing device, and the frame is arranged on the upper surface of the machine table; the first testing device comprises a testing platform, a push rod, a pressure sensor, a first linkage piece and a first screw rod, wherein one side of the testing platform is hinged with the upper surface of the machine table, the other side of the testing platform is rotatably connected with the push rod, and the other end of the push rod is hinged with the first linkage piece; the first screw is arranged on the machine table, and the first screw is in threaded fit with the first linkage piece; the pressure sensor is arranged on the rack through a first driving piece, and the first driving piece is used for pushing the pressure sensor to press the bed board so as to test the fatigue strength of the bed board.

Furthermore, the first testing device further comprises two limiting parts, and the two limiting parts are respectively attached to two sides of the testing platform.

Furthermore, the two side walls of the free side of the test platform are provided with lugs, and the two limiting parts are provided with limiting grooves matched with the lugs.

Further, a second screw and a second linkage member are arranged on the rack, and the second linkage member is fixedly connected with the first driving member; the second screw is arranged along the direction perpendicular to the support rods so as to test a plurality of groups of support rods arranged in parallel.

Furthermore, a limiting rod is arranged on the rack, the limiting rod and the second screw rod are arranged in parallel, and the first driving piece and the limiting rod are connected in a sliding mode.

Further, still be provided with second testing arrangement on the board, second testing arrangement includes rotating electrical machines and locking piece, swivelling joint with the draw-in groove has all been seted up on the relative surface of locking piece, the draw-in groove is used for inlaying and establishes the connecting piece.

Further, the second testing device further comprises a second driving member, and the second driving member is connected with the locking member.

Furthermore, a third linkage piece is arranged on the rack, a third screw rod is arranged on the machine table, and the third linkage piece is in threaded connection with the third screw rod.

Further, the lower surface of frame is provided with the sliding part, the upper surface of board be provided with sliding part complex slide rail, the slide rail is along the parallel the direction setting of bracing piece.

Furthermore, the first screw and the first linkage part are both located on the lower surface of the machine table, and the machine table is provided with a moving groove for the push rod to move.

The utility model has the advantages that:

when the first screw rod rotates, the first linkage piece sleeved outside the first screw rod can move along the axial direction of the first screw rod, so that the push rod is driven to move to push the test platform to rotate to a required position; pressure sensor passes through first driving piece and follows vertical direction motion to can make pressure sensor and bracing piece contact, thereby apply the pressure for the bracing piece when being convenient for take notes fatigue test.

Drawings

Fig. 1 is an overall schematic view of the present invention;

fig. 2 is a partial schematic view one of the present invention;

fig. 3 is a partial schematic view of the present invention.

The reference numbers in the figures illustrate: 11. a support bar; 12. a connecting member; 2. a machine platform; 21. a third screw; 22. a slide rail; 23. a moving groove; 3. a frame; 31. a second linkage member; 32. a second screw; 33. a limiting rod; 34. a third link; 35. a sliding member; 4. a test platform; 41. a bump; 5. a push rod; 6. a first screw; 61. a first linkage member; 7. a pressure sensor; 71. a first driving member; 8. a limiting member; 81. a limiting groove; 9. a locking member; 91. a rotating electric machine; 92. a second driving member.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1 and 2, an embodiment of a fatigue testing device of the present invention includes a machine platform 2, a machine frame 3, a first testing device and a second testing device, wherein the machine frame 3, the first testing device and the second testing device are all disposed on the machine platform 2. The first testing device carries out multi-group fatigue test on a test piece consisting of a plurality of supporting rods 11 and a plurality of connecting pieces 12, and the second testing device can carry out fatigue test on the independent connecting pieces 12 so as to improve the accuracy of test results.

Referring to fig. 1 and 2, the first testing device includes a testing platform 4, a push rod 5, a pressure sensor 7, a first linkage 61 and a first screw 6, one side of the testing platform 4 is rotatably connected with the upper surface of the machine platform 2 through a hinge, and the other side of the testing platform 4 is connected with the push rod 5. One end of the push rod 5 is rotatably connected with the test platform 4, the other end of the push rod 5 is rotatably connected with the first linkage piece 61, and the first linkage piece 61 is sleeved on the first screw rod 6 and is in threaded connection with the first screw rod 6. In this embodiment, the first linkage member 61 and the first screw 6 are disposed on the lower surface of the table top of the machine table 2, so that the machine table 2 is provided with a moving groove 23 for the movement of the push rod 5. When the first screw 6 connected with the servo motor rotates, the first linkage part 61 sleeved outside the first screw can move along the axial direction of the first screw 6, so as to drive the push rod 5 to move to push the test platform 4 to rotate to a required position. The pressure sensor 7 is moved in the vertical direction by the first driving member 71 so that the pressure sensor 7 can be brought into contact with the support rod 11, thereby facilitating recording of the pressure applied to the support rod 11 at the time of the fatigue test.

Referring to fig. 2 and 3, the first testing device further includes two limiting members 8, the two limiting members 8 are respectively located at two sides of the testing platform 4, and the two limiting members 8 are both attached to the side wall of the testing platform 4, so that the testing platform 4 can be limited from shifting along the length direction thereof during the rotation process of the testing platform 4. In addition, two side walls of the free end of the testing platform 4 are both provided with a bump 41, and two limiting members 8 are both provided with two arc-shaped limiting grooves 81 matched with the bump 41, so that the rotating angle and the rotating track of the testing platform 4 can be limited by the matching of the bump 41 and the limiting grooves 81.

Referring to fig. 2 and 3, the second testing device includes a rotating electrical machine 91 and a locking member 9, and two opposite side surfaces of the rotating electrical machine 91 and the locking member 9 are respectively provided with a clamping groove, and the two clamping grooves are used for clamping and embedding the connecting member 12. During the test, the connector 12 is placed between the two card slots, and then the rotation of the rotating motor 91 is used for testing the connector 12.

Referring to fig. 1 to 3, the second testing device further includes a second driving member 92, and an extending shaft of the second driving member 92 is connected to the locking member 9, so that the locking member 9 can be pushed by the second driving member 92 to move, so as to adjust the distance of the locking member 9 relative to the rotating motor 91 according to different specifications of the connecting member 12. Meanwhile, in order to ensure that the relative position of the second testing device and the table-board is unchanged, the second testing device further comprises a fixing frame, and the second driving piece 92 and the rotating motor 91 are respectively arranged on two opposite sides of the fixing frame. Meanwhile, the fixed frame can be also provided with a plurality of sliding rods, and the sliding rods penetrate through the locking piece 9, so that the movement direction of the locking piece 9 can be limited.

Referring to fig. 1 to 3, the frame 3 is provided with a second screw 32 and a second linkage member 31 in threaded engagement with the second screw 32, the second linkage member 31 is fixedly connected to the first driving member 71, and the second screw 32 is disposed in a direction perpendicular to the support rod 11. When the second screw 32 is rotated, the driving member and the pressure sensor 7 can be driven to move along the direction perpendicular to the length of the supporting rod 11 through the cooperation of the second screw 32 and the second linkage member 31, so that the supporting rod 11 can be tested one by one. Meanwhile, a limiting rod 33 is further arranged on the rack 3, and the limiting rod 33 and the second screw 32 are arranged in parallel; meanwhile, the limiting rod 33 can be slidably connected with the first driving member 71 to limit the moving direction of the first driving member 71.

Referring to fig. 2 and 3, a third link 34 is further disposed on the frame 3, the second screw 32 is rotatably disposed on the upper surface of the machine table 2, and the third link 34 is in threaded engagement with the third screw 21. The third screw 21 is arranged in parallel with the length direction of the support rod 11, so that the movement of the frame 3 along the length direction of the support rod 11 can be realized by the cooperation of the third linkage 34 and the third screw 21, so as to perform fatigue testing on each position of the support rod 11, and improve the accuracy of the test result.

Referring to fig. 1 to 3, a sliding member 35 is disposed on a lower surface of the frame 3, a slide rail 22 engaged with the sliding member 35 is disposed on an upper surface of the machine base 2, and the sliding member 35 is engaged with the slide rail 22, so that a moving direction of the frame 3 can be limited.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A fatigue testing device is used for testing the fatigue strength of a test piece, the test piece comprises supporting rods and connecting pieces, the connecting pieces are used for connecting two adjacent supporting rods, and the fatigue testing device is characterized by comprising a machine table, a rack and a first testing device, wherein the rack is arranged on the upper surface of the machine table; the first testing device comprises a testing platform, a push rod, a pressure sensor, a first linkage piece and a first screw rod, wherein one side of the testing platform is hinged with the upper surface of the machine table, the other side of the testing platform is rotatably connected with the push rod, and the other end of the push rod is hinged with the first linkage piece; the first screw is arranged on the machine table, and the first screw is in threaded fit with the first linkage piece; the pressure sensor is arranged on the rack through a first driving piece, and the first driving piece is used for pushing the pressure sensor to press the test piece so as to test the fatigue strength of the test piece.

2. The fatigue testing device of claim 1, wherein the first testing device further comprises two stoppers, and the two stoppers are respectively attached to two sides of the testing platform.

3. The fatigue testing device according to claim 2, wherein two side walls of the free side of the testing platform are provided with protrusions, and both of the position-limiting members are provided with position-limiting grooves engaged with the protrusions.

4. The fatigue testing device of claim 1, wherein a second screw and a second linkage member are disposed on the frame, and the second linkage member is fixedly connected to the first driving member; the second screw is arranged along the direction perpendicular to the support rods so as to test a plurality of groups of support rods arranged in parallel.

5. The fatigue testing device of claim 4, wherein a limiting rod is disposed on the frame, the limiting rod is disposed in parallel with the second screw, and the first driving member is slidably connected to the limiting rod.

6. The fatigue testing device of claim 1, wherein the machine table is further provided with a second testing device, the second testing device comprises a rotating motor and a locking piece, clamping grooves are formed in surfaces of the rotating connection and the locking piece, and the clamping grooves are used for embedding the connecting pieces.

7. A fatigue testing device according to claim 6, wherein said second testing device further comprises a second driving member, said second driving member being connected to said locking member.

8. The fatigue testing device of claim 1, wherein a third linkage member is arranged on the frame, a third screw is arranged on the machine table, and the third linkage member is in threaded connection with the third screw.

9. The fatigue testing device of claim 8, wherein a sliding member is disposed on a lower surface of the frame, and a sliding rail engaged with the sliding member is disposed on an upper surface of the machine platform and arranged in a direction parallel to the supporting rod.

10. The fatigue testing device of claim 1, wherein the first screw and the first linkage member are both located on a lower surface of the machine, and the machine is provided with a moving groove for the movement of the push rod.