Detachable three-cylinder bending testing machine

Abstract

The utility model discloses a detachable three-cylinder bending testing machine which comprises a supporting frame, two supporting point devices which are symmetrically arranged left and right are arranged on the supporting frame, a fixing groove is formed in each supporting point device, a round supporting block device movably connected with the fixing groove is arranged on the fixing groove, and a replacement mechanism is connected to the supporting frame. The replacement mechanism is detachably connected with the two pieces of circular supporting block equipment; the supporting frame is further connected with a piston detection device, and the piston detection device is located between the two supporting point devices. According to the detachable three-cylinder bending testing machine provided by the utility model, supporting points on circular supporting block equipment can be quickly switched to other surfaces which are not pressed for use, so that the utilization rate of the supporting points is improved.

Description

Technical Field

[0001] The utility model relates to the field of three-cylinder bending testing machines, in particular to a detachable three-cylinder bending testing machine. Background Art

[0002] A three-cylinder bend tester is a machine specifically designed to measure the bending toughness and strength of materials. The material is placed between two supports and then a load is applied perpendicular to the material's axis, causing it to deform with curvature. The applied load and resulting deformation are recorded to assess performance indicators such as bending strength and stiffness. The three-cylinder bend tester is widely used to test a variety of materials, including metals, composites, rubber, plastics, and paper.

[0003] However, the above design has the following defects: during the test, the material is placed on two supporting points and is subjected to vertical pressure. Therefore, under the action of pressure on the supporting points for a long time, the position of the supporting points is prone to deformation. Moreover, the materials placed during long-term testing are also different, so the position of the supporting points is inconsistently deformed and it is easy to have concave and convex surfaces. At this time, the staff needs to open the fixed bolts and replace the new supporting point blocks, but the bolts are prone to rust after long-term use and are difficult to unscrew and replace. Utility Model Content

[0004] The utility model aims to provide a detachable three-cylinder bending tester, which can quickly switch the supporting points on the circular support block equipment to other non-pressurized surfaces for use, thereby improving its utilization rate.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a detachable three-cylinder bending testing machine, including a support frame, on which are provided two support point devices symmetrically arranged on the left and right, each support point device is provided with a fixed groove, and the fixed groove is provided with a circular support block device movably connected thereto, and a replacement mechanism is connected to the support frame, and the replacement mechanism is detachably connected to the two circular support block devices; the support frame is also connected to a piston detection device, and the piston detection device is located between the two support point devices.

[0006] As a further improvement of the present invention, the supporting point device includes a sliding block, which is slidingly connected to the support frame through a guide rail, and a position locking structure is provided between the sliding block and the support frame; the fixing groove is an inwardly concave arc groove and is arranged on the sliding block.

[0007] As a further improvement of the present invention, the circular support block device includes a circular block, which is cylindrical and whose outer surface is adapted to the fixing groove; the circular support block device also includes an auxiliary fixing device, one end of the auxiliary fixing device is connected to the sliding block, and the other end is detachably connected to one end of the circular block; the other end of the circular block is detachably connected to the replacement mechanism.

[0008] As a further improvement of the present invention, the replacement mechanism includes two triangular clamping rods, which are rotatably connected to the support frame through bearings; each triangular clamping rod includes a rotating shaft and a pin fixedly connected to the outside of the rotating shaft; a first fixed groove is provided in the middle of one end of the circular block, and a clamping groove is provided on the outside of the first fixed groove. The rotating shaft of the triangular clamping rod is plugged into and matched with the first fixed groove, and the pin of the triangular clamping rod is plugged into and matched with the clamping groove.

[0009] As a further improvement of the present invention, the auxiliary fixing device includes a matching rotating rod and a top block, the top block is connected to the sliding block; one end of the rotating rod is rotatably connected to the sliding block, and the other end is provided with a through hole, on which a positioning rod is slidably connected, and a compression spring is connected between the positioning rod and the rotating rod; one end of the circular block is provided with at least two positioning grooves arranged around its rotation axis, and the positioning rod is plugged into the positioning groove.

[0010] As a further improvement of the present invention, the replacement mechanism also includes a first drive gear and a second drive gear, both of which are coaxially connected to the two triangular connecting rods respectively. The first drive gear is linked to a drive motor, and the drive motor is installed on the support frame; the first drive gear is engaged with a first transmission gear, and the first transmission gear is coaxially connected to the second transmission gear, and the second transmission gear and the second drive gear are linked through a gear chain.

[0011] Beneficial effects

[0012] Compared with the prior art, the advantages of the detachable three-cylinder bending testing machine of the present invention are:

[0013] 1. Place the material on the two circular blocks of the circular support device. Use the piston detection device to apply pressure to the center of the material to cause the material to deform. When the two circular blocks supporting the material are deformed by pressure, the replacement mechanism can rotate the circular blocks to a certain angle, thereby fully utilizing the circular blocks.

[0014] 2. The sliding block is provided with a fixed groove in the shape of an inward concave arc, which is used to support the cylindrical surface of the circular block and prevent the circular block from tilting when the material being tested is pressurized by the piston testing equipment.

[0015] 3. To replace the entire circular block, remove the positioning rod on the auxiliary fixing device's rotating rod from the corresponding positioning slot on the circular block. Rotate the rotating rod until it is offset from the circular block. Then remove the circular block from the triangular clamping rod. This completes the removal of the circular block and replaces it with a new one. The top block on the sliding block limits the swing of the rotating rod.

[0016] 4. In the replacement mechanism, the two circular blocks can be driven to rotate simultaneously by the driving motor, which is lower in cost.

[0017] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a three-dimensional diagram of a detachable three-cylinder bending testing machine;

[0020] Figure 2 This is the main view of the detachable three-cylinder bending testing machine;

[0021] Figure 3 This is a three-dimensional diagram of the internal structure of a detachable three-cylinder bending testing machine;

[0022] Figure 4 A perspective view of a replacement mechanism;

[0023] Figure 5 This is one of the schematic diagrams of the expanded structure of the circular support block equipment;

[0024] Figure 6 This is the second schematic diagram of the expanded structure of the circular support block equipment.

[0025] In the figure: 1-support frame; 2-piston detection device; 3-support point device; 30-fixed groove; 4-circular support block device; 5-replacement mechanism; 31-sliding block; 40-circular block; 41-first fixed groove; 42-clamping groove; 43-positioning groove; 44-auxiliary fixing device; 45-rotating rod; 46-top block; 450-through hole; 47-positioning rod; 48-compression spring; 50-triangular clamping rod; 51-first driving gear; 52-second driving gear; 53-driving motor; 54-first transmission gear; 55-second transmission gear; 56-gear chain. DETAILED DESCRIPTION

[0026] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] Example

[0028] The specific implementation of the utility model is as follows Figures 1 to 6As shown, a detachable three-cylinder bending tester includes a support frame 1, on which are mounted two symmetrically arranged support point devices 3. Each support point device 3 has a fixing slot 30, and a circular support block device 4 is movably connected to the fixing slot 30. The support frame 1 is connected to a replacement mechanism 5, which is detachably connected to the two circular support blocks 4. The support frame 1 is also connected to a piston detection device 2, which is located between the two support point devices 3.

[0029] The supporting point device 3 includes a sliding block 31, which is slidably connected to the support frame 1 through a guide rail, and a position locking structure is provided between the sliding block 31 and the support frame 1. The fixed groove 30 is a concave arc groove and is provided on the sliding block 31. Among them, the left and right sliding blocks 31 can slide towards each other to achieve mutual approach and distance, and the position locking structure can adopt a structure in which a pin and a socket are matched. The socket is provided on the sliding block 31 and the support frame 1. When the pin passes through the corresponding sockets of the sliding block 31 and the support frame 1, the sliding block 31 can be locked on the support frame 1. The setting of the fixed groove 30 can ensure that when the sliding block 31 moves outward relative to the circular block 40, there will be no interference between the two, and when the circular block 40 is in contact with the fixed groove 30, the fixed groove 30 can support the bottom of the circular block 40.

[0030] The circular support device 4 includes a cylindrical block 40, whose outer surface fits within the fixing groove 30. The circular support device 4 also includes an auxiliary fixing device 44, one end of which is connected to the sliding block 31 and the other end of which is detachably connected to one end of the circular block 40. The other end of the circular block 40 is detachably connected to the replacement mechanism 5.

[0031] The material is placed on the circular blocks 40 of the two circular support block devices 4. The piston testing device 2 applies pressure to the center of the material, causing it to deform. When the support portions of the two circular blocks 40 deform due to pressure, the replacement mechanism 5 can be used to rotate the blocks 40 to a certain angle, fully utilizing their surface areas. The piston testing device 2 can be driven by a hydraulic or pneumatic cylinder to apply pressure to the material from above.

[0032] The replacement mechanism 5 comprises two triangular clamping rods 50, which are rotatably connected to the support frame 1 via bearings. Each triangular clamping rod 50 comprises a rotating shaft and two latches fixedly connected to the outer side of the rotating shaft. A first fixing slot 41 is provided in the middle of one end of the circular block 40, and a clamping slot 42 is provided outside the first fixing slot 41. The rotating shafts of the triangular clamping rods 50 engage with the first fixing slot 41, and the latches of the triangular clamping rods 50 engage with the clamping slot 42.

[0033] The auxiliary fixing device 44 includes a matching rotating rod 45 and a top block 46. The top block 46 is connected to the sliding block 31. One end of the rotating rod 45 is rotatably connected to the sliding block 31, and the other end is provided with a through hole 450. A positioning rod 47 is slidably connected to the through hole 450. A compression spring 48 is connected between the positioning rod 47 and the rotating rod 45. One end of the circular block 40 is provided with at least two positioning grooves 43 arranged around its rotation axis. The positioning rods 47 plug into the positioning grooves 43. In this embodiment, each circular block 40 has six positioning grooves 43 on one end.

[0034] The replacement mechanism 5 also includes a first drive gear 51 and a second drive gear 52, both of which are coaxially connected to the two triangular connecting rods 50. The first drive gear 51 is connected to a drive motor 53, which is mounted on the support frame 1. The first drive gear 51 is meshed with a first transmission gear 54, which is coaxially connected to a second transmission gear 55. The second transmission gear 55 and the second drive gear 52 are connected via a gear chain 56.

[0035] When the circular block 40 needs to be rotated, the positioning rod 47 is pulled out of the positioning groove 43, the rotating rod 45 is removed, and then the driving motor 53 is started, so that the two triangular connecting rods 50 simultaneously drive the circular block 40 to rotate a certain angle. Then the driving motor 53 is turned off, the compression spring 48 is reset, and the positioning rod 47 on the rotating rod 45 is inserted into the corresponding positioning groove 43 on the circular block 40 to lock the circular block 40.

[0036] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A detachable three-cylinder bending tester, characterized in that: The invention comprises a support frame (1), wherein the support frame (1) is provided with two supporting point devices (3) arranged symmetrically on the left and right, each supporting point device (3) is provided with a fixing groove (30), and the fixing groove (30) is provided with a circular supporting block device (4) movably connected thereto, and a replacement mechanism (5) is connected to the support frame (1), and the replacement mechanism (5) is detachably connected to the two circular supporting block devices (4); the support frame (1) is also connected with a piston detection device (2), and the piston detection device (2) is located between the two supporting point devices (3).

2. A detachable three-cylinder bending testing machine according to claim 1, characterized in that: The supporting point device (3) comprises a sliding block (31), the sliding block (31) and the supporting frame (1) are slidably connected via a guide rail, and a position locking structure is provided between the sliding block (31) and the supporting frame (1); the fixing groove (30) is an inwardly concave arc groove and is provided on the sliding block (31).

3. A detachable three-cylinder bending testing machine according to claim 2, characterized in that: The circular support block device (4) includes a circular block (40) having a cylindrical shape and an outer surface thereof adapted to the fixing groove (30); the circular support block device (4) also includes an auxiliary fixing device (44), one end of the auxiliary fixing device (44) is connected to the sliding block (31), and the other end is detachably connected to one end of the circular block (40); the other end of the circular block (40) is detachably connected to the replacement mechanism (5).

4. A detachable three-cylinder bending testing machine according to claim 3, characterized in that: The replacement mechanism (5) comprises two triangular clamping rods (50), which are rotatably connected to the support frame (1) via bearings; each triangular clamping rod (50) comprises a rotating shaft and a latch fixedly connected to the outside of the rotating shaft; a first fixing groove (41) is provided in the middle of one end of the circular block (40), and a clamping groove (42) is provided on the outside of the first fixing groove (41); the rotating shaft of the triangular clamping rod (50) is plugged into and matched with the first fixing groove (41), and the latch of the triangular clamping rod (50) is plugged into and matched with the clamping groove (42).

5. The detachable three-cylinder bending testing machine according to claim 3, characterized in that: The auxiliary fixing device (44) includes a matching rotating rod (45) and a top block (46), and the top block (46) is connected to the sliding block (31); one end of the rotating rod (45) is rotatably connected to the sliding block (31), and the other end is provided with a through hole (450), and a positioning rod (47) is slidably connected to the through hole (450), and a compression spring (48) is connected between the positioning rod (47) and the rotating rod (45); one end of the circular block (40) is provided with at least two positioning grooves (43) arranged around its rotation axis, and the positioning rod (47) is plugged into and matched with the positioning groove (43).

6. The detachable three-cylinder bending testing machine according to claim 4, characterized in that: The replacement mechanism (5) further comprises a first driving gear (51) and a second driving gear (52) which are coaxially connected to the two triangular connecting rods (50), respectively; the first driving gear (51) is linked to a driving motor (53), and the driving motor (53) is mounted on the support frame (1); the first driving gear (51) is meshed with a first transmission gear (54), the first transmission gear (54) is coaxially connected to a second transmission gear (55), and the second transmission gear (55) and the second driving gear (52) are linked via a gear chain (56).

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