Anti-bending testing machine with good centering effect

Abstract

The utility model relates to an anti-bending testing machine with a good centering effect, the anti-bending testing machine comprises a rack, a main hydraulic rod and a centering assembly, the main hydraulic rod is arranged on the rack, the centering assembly comprises two clamping seats and a driving part, the driving part is used for driving the two clamping seats to be close to or away from orthographic projection of the main hydraulic rod, and the main hydraulic rod is arranged on the rack. Two clamping plates and a driving part are arranged on the clamping seat, the two clamping plates are connected to the clamping seat in a sliding mode in the horizontal direction perpendicular to the moving direction of the clamping seat, and the driving part is used for driving the two clamping plates to be close to or away from the orthographic projection of the main hydraulic rod. The device has the effect that the main hydraulic rod is uniformly stressed.

Description

Technical Field

[0001] The present application relates to the field of flexural testing machines, and in particular to a flexural testing machine with good centering effect. Background Art

[0002] The flexural testing machine is mainly used for flexural strength testing of specimens such as concrete, refractory materials, bricks, etc. and compressive strength testing of cement, mortar, refractory materials, bricks and other building materials.

[0003] Currently, a Chinese utility model patent, publication number CN215525331U, discloses a ceramic tile flexural testing machine, comprising a machine body, a main hydraulic rod, and a moving device. The machine body is provided with a control panel on its surface, an extrusion rod is provided at one end of the main hydraulic rod, and a support frame is provided inside the machine body. The moving device is located inside the machine body and is used to adjust the position of the support member supporting the ceramic tile during installation. The moving device includes a servo motor installed inside the support frame, a drive gear installed at the drive end of the servo motor, a support column sliding on the inner wall of the support frame, a threaded rod connected to the inner wall of the support frame, and a gear belt meshing with the surface of the drive gear. This utility model improves the accuracy of experimental data through a stabilization device.

[0004] The test blocks are usually placed manually on the support columns. The midpoint of the manually placed stones does not coincide with the projection of the main hydraulic rod. When the extrusion rod is performing a flexural test on the test blocks, the main hydraulic rod is easily subjected to uneven force, and the service life of the main hydraulic rod is relatively short. Utility Model Content

[0005] In order to make the main hydraulic rod bear the force evenly, the present application provides a bending resistance testing machine with good centering effect.

[0006] This application provides a flexural testing machine with good centering effect, which adopts the following technical solutions:

[0007] A bending resistance testing machine with good centering effect includes a frame, a main hydraulic rod and a centering component, the main hydraulic rod is arranged on the frame, the centering component includes two clamping seats and a driving member, the driving member is used to drive the two clamping seats to approach or move away from the positive projection of the main hydraulic rod, two clamping plates and a driving member are provided on the clamping seat, the two clamping plates are slidably connected to the clamping seat along a horizontal and perpendicular direction of movement of the clamping seat, and the driving member is used to drive the two clamping plates to approach or move away from the positive projection of the main hydraulic rod.

[0008] By adopting the above technical solution, the staff first places the test block to be tested on the frame, and the staff adjusts the position of the test block through the centering component. The staff first uses the driving member to drive the two clamping seats to move, and the two clamping seats abut against the opposite side walls of the test block. After that, the staff uses the driving member to drive the two clamping plates on the clamping seats to approach each other until the clamping plates abut against the other two side walls of the test block. Under the action of the clamping seat and the clamping plate, the midpoint position of the test block coincides with the positive projection of the main hydraulic rod. When the main hydraulic rod performs a flexural test on the test block, the main hydraulic rod is evenly stressed, which extends the service life of the main hydraulic rod.

[0009] Optionally, the driving member includes a first bidirectional screw, the length direction of the first bidirectional screw is parallel to the sliding direction of the clamping seat, the first bidirectional screw is rotatably connected to the frame, and the two clamping seats are respectively threadedly connected to the threaded sections of the first bidirectional screw with opposite rotation directions.

[0010] By adopting the above technical solution, the staff can rotate the first bidirectional screw to drive the two clamping seats closer to each other and adjust the position of the test block until both clamping seats are in contact with the test block. The first bidirectional screw has high transmission accuracy and reasonable structure, which is convenient for the staff to operate.

[0011] Optionally, the driving member also includes a rotating rod, a first disengagement spring, a first crown gear and a second crown gear, the rotating rod is coaxially arranged with the first bidirectional screw, the rotating rod is rotatably connected to the frame, the first crown gear is arranged on the rotating rod, the second crown gear is slidably connected to the first bidirectional screw along the length direction of the first bidirectional screw, and the first disengagement spring is used to keep the second crown gear engaged with the first crown gear.

[0012] By adopting the above technical solution, the staff drives the rotating rod to rotate, the rotating rod drives the first crown gear to rotate, the first crown gear drives the second crown gear to rotate, the second crown gear drives the first bidirectional screw to rotate, and the first bidirectional screw drives the two clamping seats to move the test block until it abuts against both sides of the test block. At this time, if the staff rotates the rotating rod again, since both clamping seats abut against the test block, the second crown gear will overcome the elastic force of the first disengagement spring, so that the first crown gear and the second crown gear are disengaged, which reduces the staff from over-driving the rotating rod, causing the test block to be clamped too tightly by the clamping seat, and reduces the test block from being subjected to excessive force and causing deformation.

[0013] Optionally, the driving member includes a second bidirectional screw, the length direction of the second bidirectional screw is parallel to the sliding direction of the clamping plate, the second bidirectional screw is rotatably connected to the clamping seat, and the two clamping plates are threadedly connected to the thread segments of the second bidirectional screw with opposite rotation directions.

[0014] By adopting the above technical solution, after the staff has respectively placed the two clamping seats against the two sides of the test block, the staff can rotate the second bidirectional screw, and the second bidirectional screw will drive the two clamping plates to move. The two clamping plates will approach each other and drive the test block to move until the clamping plates are in contact with the two sides of the test block. The driving member structure is simple and reasonable, which is convenient for the staff to operate.

[0015] Optionally, the driving member also includes a worm wheel and a worm, and the centering component also includes a matching rod, the length direction of the matching rod is parallel to the length direction of the first bidirectional screw, the matching rod is rotatably connected to the frame, the worm is slidably connected to the matching rod along the length direction of the matching rod, the worm is rotatably connected to the clamping seat, the worm wheel is rotatably connected to the clamping seat, the worm wheel is used to drive the second bidirectional screw to rotate, and the worm wheel is engaged with the worm.

[0016] By adopting the above technical solution, when the staff drives the two clamping seats to move through the driving member, the clamping seat will drive the second bidirectional screw to move, the worm gear is in a meshing state, and the worm can move on the matching rod; after the staff adjusts the clamping seat, the staff rotates the matching rod, the matching rod drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the second bidirectional screw to rotate, and the second bidirectional screw drives the two clamping plates to approach each other and abut against both sides of the test block. The matching rod realizes the simultaneous movement of the two clamping plates on the two clamping seats, thereby improving the adjustment speed of the staff.

[0017] Optionally, the driving member also includes a second disengagement spring, a third crown gear and a fourth crown gear, the third crown gear is arranged on the worm gear, the fourth crown gear is slidably connected to the second bidirectional screw along the length direction of the second bidirectional screw, and the second disengagement spring is used to keep the fourth crown gear engaged with the third crown gear.

[0018] By adopting the above technical solution, when the staff rotates the matching rod, the clamping plate is abutted against both sides of the test block through the transmission of the worm and the worm wheel. At this time, when the staff still keeps driving the matching rod to rotate, the worm will still drive the worm wheel to rotate. Since the clamping plate has already abutted against both sides of the test block, the fourth crown gear will overcome the elastic force of the disengagement spring and move in the direction away from the third crown gear, and the third crown gear will disengage from the fourth crown gear, thereby reducing the staff from over-driving the matching rod, which will cause the test block to be clamped too tightly by the clamping plate, and reducing the test block from being subjected to excessive force and deformation.

[0019] Optionally, the centering component further includes a first gear and a second gear, the first gear is arranged on the matching rod, the second gear is arranged on the first bidirectional screw, and the first gear is meshed with the second gear.

[0020] By adopting the above technical solution, the staff only needs to drive the matching rod to rotate, the matching rod drives the first gear to rotate, the first gear drives the second gear to rotate, and the second gear drives the rotating rod to rotate. Through the transmission of the first gear and the second gear, the staff can only rotate the matching rod to drive the clamping seat and the clamping plate close to the test block, thereby improving the convenience of adjusting the test block position.

[0021] Optionally, a cover for covering the driving component is provided on the frame.

[0022] By adopting the above technical solution, during the test of the test block, debris of the test block will splash, and the cover is used to reduce the splashing of the debris into the driving member, thereby extending the service life of the driving member.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The centering assembly is used to adjust the position of the test block on the frame so that the midpoint of the test block is located at the positive projection of the main hydraulic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flexural testing machine with good centering effect.

[0026] Figure 2 yes Figure 1 A flexural testing machine with the cover removed is used to demonstrate the structure of the drive components.

[0027] Figure 3 yes Figure 2 Exploded diagram of the driving and driven parts.

[0028] Figure markings: 1. Frame; 2. Main hydraulic rod; 3. Centering assembly; 31. Clamping seat; 32. Driving member; 321. First bidirectional screw; 322. Rotating rod; 323. First disengagement spring; 324. First crown gear; 325. Second crown gear; 326. First sliding groove; 33. Matching rod; 34. First gear; 35. Second gear; 36. Rotating disk; 4. Pressure rod; 5. Support rod; 61. Clamping plate; 62. Driving member; 621. Second bidirectional screw; 622. Worm gear; 623. Worm; 624. Second disengagement spring; 625. Third crown gear; 626. Fourth crown gear; 627. Second sliding groove; 7. Cover. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The embodiment of the present application discloses a bending test machine with good centering effect. Figure 1 and Figure 2A flexural testing machine with good centering effect includes a frame 1, a main hydraulic rod 2, a centering component 3, a pressure rod 4 and two support rods 5. The frame 1 is set on a platform surface, the two support rods 5 are distributed along the length direction of the frame 1, the length direction of the support rod 5 is parallel to the width direction of the frame 1, the support rod 5 is fixedly set on the platform surface, the main hydraulic rod 2 is located above the support rod 5, the main hydraulic rod 2 is vertically set, the main hydraulic rod 2 is fixedly set on the frame 1, the length direction of the pressure rod 4 is parallel to the length direction of the support rod 5, and the pressure rod 4 is fixedly set on the main hydraulic rod 2.

[0031] Reference Figure 2 and Figure 3 The centering component 3 includes two clamping seats 31 and a driving member 32. The two clamping seats 31 are distributed along the distribution direction of the two support rods 5. The two clamping seats 31 are located on the outside of the two support rods 5. The clamping seats 31 are slidably connected to the platform surface of the frame 1 along the distribution direction of the two support rods 5. The driving member 32 includes a first bidirectional screw 321, a rotating rod 322, a first disengagement spring 323, a first crown gear 324 and a second crown gear 325. The length direction of the first bidirectional screw 321 is parallel to the distribution direction of the two clamping seats 31. The first bidirectional screw 321 is rotatably connected to the frame 1, and the two clamping seats 31 are respectively threadedly connected to the thread segments of the first bidirectional screw 321 that rotate in opposite directions.

[0032] Reference Figure 2 and Figure 3 The rotating rod 322 is coaxially arranged with the first bidirectional screw 321, and the rotating rod 322 is rotatably connected to the frame 1. The first crown gear 324 is coaxially arranged with the rotating rod 322. The first crown gear 324 is fixedly arranged on one end of the rotating rod 322 facing the first bidirectional screw 321. The first bidirectional screw 321 is provided with a first sliding groove 326 on one end facing the first crown gear 324. The first sliding groove 326 extends along the length direction of the first bidirectional screw 321. The second crown gear 325 is coaxially arranged with the first crown gear 324. The shaft is set, the second crown gear 325 is slidably connected to the first sliding groove 326 along the extension direction of the first sliding groove 326, the second crown gear 325 is used to engage with the first crown gear 324, the first disengagement spring 323 is located in the first sliding groove 326, the length direction of the first disengagement spring 323 is parallel to the extension direction of the first sliding groove 326, one end of the first disengagement spring 323 is fixedly set at the bottom of the first sliding groove 326, and the other end of the first disengagement spring 323 is fixedly set on the second crown gear 325.

[0033] Reference Figure 2 and Figure 3The clamping seat 31 is provided with two clamping plates 61 and a driving member 62. The two clamping plates 61 are slidably connected to the clamping seat 31 along the length direction of the support rod 5. The driving member 62 includes a second bidirectional screw 621, a worm gear 622, a worm 623, a second disengagement spring 624, a third crown gear 625 and a fourth crown gear 626. The length direction of the second bidirectional screw 621 is parallel to the sliding direction of the clamping plate 61, and the second bidirectional screw 621 is rotatably connected to the clamping seat 31. The two clamping plates 61 are respectively threadedly connected to the threaded segments of the second bidirectional screw 621 rotating in opposite directions. The worm gear 622 is coaxially arranged with the second bidirectional screw 621, and the worm gear 622 is rotatably connected to the clamping seat 31. The length direction of the worm 623 is parallel to the length direction of the first bidirectional screw 321. The worm 623 is rotatably connected to the clamping seat 31, and the worm 623 is meshed with the worm gear 622. The third crown gear 625 is arranged coaxially with the worm gear 622. The third crown gear 625 is fixedly arranged on one end of the worm gear 622 facing the second bidirectional screw 621. A second sliding groove 627 is opened at one end of the second bidirectional screw 621 facing the worm gear 622. The second sliding groove 627 extends along the length direction of the second bidirectional screw 621. The fourth crown gear 626 is slidably connected in the second sliding groove 627 along the extension direction of the second sliding groove 627. The second disengagement spring 624 is located in the second sliding groove 627. The length direction of the second disengagement spring 624 is parallel to the length direction of the second bidirectional screw 621. One end of the second disengagement spring 624 is fixedly arranged at the bottom of the second sliding groove 627. The other end of the second disengagement spring 624 is fixedly arranged on the fourth crown gear 626. The second disengagement spring 624 is used to keep the third crown gear 625 and the fourth crown gear 626 engaged.

[0034] Reference Figure 1 and Figure 3 The centering component 3 also includes a matching rod 33, a first gear 34, a second gear 35 and a rotating disk 36. The matching rod 33 is coaxially arranged with the worm 623. The worm 623 is slidably connected to the matching rod 33 along the length direction of the matching rod 33. The matching rod 33 is rotatably connected to the frame 1. The first gear 34 is coaxially arranged with the matching rod 33. The first gear 34 is fixedly arranged on the matching rod 33. The second gear 35 is coaxially arranged with the rotating rod 322. The second gear 35 is fixedly arranged on the rotating rod 322. The first gear 34 is meshed with the second gear 35. The rotating disk 36 is fixedly arranged on one end of the matching rod 33. A cover 7 is fixedly arranged on the frame 1. The cover 7 is used to cover the driving member 32.

[0035] The implementation principle of the bending tester with good centering effect in the embodiment of the present application is as follows: when the staff needs to test the test block, the staff places the test block on the two support rods 5, and then the staff rotates the rotating disk 36, the rotating disk 36 drives the matching rod 33 to rotate, the matching rod 33 drives the two worms 623 to rotate, the worm 623 drives the worm wheel 622 to rotate, the worm wheel 622 drives the third crown tooth to rotate, the third crown tooth drives the fourth crown tooth to rotate, the fourth crown tooth drives the second bidirectional screw 621 to rotate, and the second bidirectional screw 621 drives the two clamping plates 61 to move closer to the test block until the clamping plates 61 abut against both sides of the test block; at the same time, the matching rod 33 It will drive the first gear 34 to rotate, the first gear 34 drives the second gear 35 to rotate, the second gear 35 drives the first crown gear 324 to rotate, the first crown gear 324 drives the second crown gear 325 to rotate, the second crown gear 325 drives the first bidirectional screw 321 to rotate, and the first bidirectional screw 321 drives the two clamping seats 31 to approach each other until the two clamping seats 31 abut against both sides of the test block. Since the moving directions of the clamping plate 61 and the clamping seat 31 are perpendicular to each other, when the clamping seat 31 and the clamping plate 61 both abut against the side walls of the test block, the midpoint of the test block is located at the positive projection of the main hydraulic rod 2, so that the force on the main hydraulic rod 2 is balanced during the bending test.

[0036] When the size of the test block changes, the clamping seat 31 is already in contact with the side wall of the test block while the clamping plate 61 has not yet contacted the side wall of the test block, the staff continues to rotate the matching rod 33, and the matching rod 33 drives the clamping plate 61 closer to the test block through the matching part; because the clamping seat 31 is in contact with the side wall of the test block, when the first crown gear 324 continues to rotate, the second crown gear 325 will overcome the elastic force of the spring and move in the direction away from the first crown gear 324, so that the first bidirectional screw 321 cannot rotate; the opposite can also be achieved, and the centering component 3 can be adapted to test blocks of different sizes through the driving member 32 and the matching member.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flexural testing machine with good centering effect, characterized by: The invention comprises a frame (1), a main hydraulic rod (2) and a centering component (3), wherein the main hydraulic rod (2) is arranged on the frame (1), and the centering component (3) comprises two clamping seats (31) and a driving member (32), wherein the driving member (32) is used to drive the two clamping seats (31) to move closer to or away from the positive projection of the main hydraulic rod (2), and the clamping seat (31) is provided with two clamping plates (61) and a driving member (62), wherein the two clamping plates (61) are connected to the clamping seat (31) by sliding along a horizontal direction and perpendicular to the moving direction of the clamping seat (31), and the driving member (62) is used to drive the two clamping plates (61) to move closer to or away from the positive projection of the main hydraulic rod (2).

2. A bending tester with good centering effect according to claim 1, characterized in that: The driving member (32) includes a first bidirectional screw (321), the length direction of the first bidirectional screw (321) is parallel to the sliding direction of the clamping seat (31), the first bidirectional screw (321) is rotatably connected to the frame (1), and the two clamping seats (31) are respectively threadedly connected to the threaded sections of the first bidirectional screw (321) with opposite rotation directions.

3. A bending tester with good centering effect according to claim 2, characterized in that: The driving member (32) further includes a rotating rod (322), a first disengagement spring (323), a first crown gear (324) and a second crown gear (325), wherein the rotating rod (322) is coaxially arranged with the first bidirectional screw (321), the rotating rod (322) is rotatably connected to the frame (1), the first crown gear (324) is arranged on the rotating rod (322), the second crown gear (325) is slidably connected to the first bidirectional screw (321) along the length direction of the first bidirectional screw (321), and the first disengagement spring (323) is used to keep the second crown gear (325) engaged with the first crown gear (324).

4. The bending tester with good centering effect according to claim 3, characterized in that: The driving member (62) includes a second bidirectional screw (621), the length direction of the second bidirectional screw (621) is parallel to the sliding direction of the clamping plate (61), the second bidirectional screw (621) is rotatably connected to the clamping seat (31), and the two clamping plates (61) are threadedly connected to the threaded sections of the second bidirectional screw (621) that rotate in opposite directions.

5. The bending tester with good centering effect according to claim 4, characterized in that: The driving member (62) further includes a worm wheel (622) and a worm (623), and the centering component (3) further includes a matching rod (33), the length direction of the matching rod (33) is parallel to the length direction of the first bidirectional screw (321), the matching rod (33) is rotatably connected to the frame (1), the worm (623) is slidably connected to the matching rod (33) along the length direction of the matching rod (33), the worm (623) is rotatably connected to the clamping seat (31), the worm wheel (622) is rotatably connected to the clamping seat (31), the worm wheel (622) is used to drive the second bidirectional screw (621) to rotate, and the worm wheel (622) is engaged with the worm (623).

6. The bending tester with good centering effect according to claim 5, characterized in that: The driving member (62) further includes a second disengagement spring (624), a third crown gear (625) and a fourth crown gear (626), wherein the third crown gear (625) is arranged on the worm gear (622), and the fourth crown gear (626) is slidably connected to the second bidirectional screw (621) along the length direction of the second bidirectional screw (621), and the second disengagement spring (624) is used to keep the fourth crown gear (626) engaged with the third crown gear (625).

7. The bending tester with good centering effect according to claim 5, characterized in that: The centering component (3) further includes a first gear (34) and a second gear (35), wherein the first gear (34) is arranged on the matching rod (33), and the second gear (35) is arranged on the rotating rod (322), and the first gear (34) is meshed with the second gear (35).

8. The bending tester with good centering effect according to claim 1, characterized in that: The frame (1) is provided with a covering cover (7) for covering the driving member (32).

Images