Bending test device
Through the combination of worm, worm gear and adjustment gear, the problems of low efficiency and poor accuracy during the alignment of existing material bending test devices are solved, and the rapid and accurate adjustment of the span of the support part is achieved, and the accuracy and stability of the bending test results are improved.
Patent Information
- Application Number
- CN202421457681.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-06-24
AI Technical Summary
The existing material bending test devices have problems of low efficiency and poor accuracy during the alignment process, especially the caliper measuring left and right lengths of the loading head is inefficient and difficult to accurately measure the center position. The fixed span centering plate method is prone to sliding collision after adjustment, resulting in inaccurate alignment.
The distance adjustment assembly of the worm, worm gear and adjustment gear is adopted to achieve synchronous movement of the two support parts through the fixed connection between the worm gear and the adjustment gear. Combined with the self-locking effect of the worm gear and worm gear, the stability and accuracy of span adjustment are ensured.
The rapid and accurate adjustment of the span of the support part is achieved, the accuracy of the bending test results is improved, the error caused by accidental shaking is reduced, and the accuracy and efficiency of the test are improved.
Smart Images
Figure CN223154730U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of material performance testing, and particularly relates to a bending test device Background Art
[0002] The material bending test is a test for measuring the mechanical properties of materials under bending loads, and is one of the basic methods for material mechanical property tests. The bending test is mainly used to measure the flexural strength of brittle and low-plasticity materials (such as composite materials, etc.) and can reflect the deflection of plastic indicators
[0003] There are mainly two existing centering methods: one is to use a caliper to measure the left and right lengths of the loading head; the other is to use a fixed-span centering plate
[0004] Among them, the centering method of using a caliper to measure the left and right lengths of the loading head has obvious drawbacks, mainly manifested as: it is necessary to repeatedly measure the lengths of the left and right sides of the loading head from the support, and adjust the fixture position multiple times to finally determine the centering of the fixture. This method is inefficient; in addition, the center positions of the loading head and the support are difficult to accurately measure, affecting the accuracy of adjusting the centering of the test fixture. For the method of using a fixed-span centering plate, its advantage is that it can quickly center and is simple and easy to operate. However, when the material bending test fixture is centered, the method of rotating and adjusting with gears and racks cannot be locked after adjustment, resulting in collision and sliding during installation, thus leading to inaccurate centering
[0005] It should be noted here that the statements in this background art section only provide background art related to this application and do not necessarily constitute prior art Summary of the Utility Model
[0006] This application provides a bending test device to improve the accuracy of test results
[0007] The present application provides a bending test device, which includes a bending test fixture and a distance adjustment device. The bending test fixture includes a fixture base, two support parts and a loading head. The two support parts and the loading head are all arranged on the fixture base. The positions of the two support parts relative to the fixture base are adjustable. The two support parts are used to support the bending test piece during the bending test. The loading head is used to apply pressure to the bending test piece to conduct the bending test. The distance adjustment device includes a base, two position adjustment parts and a distance adjustment component. The two position adjustment parts are slidably arranged on the base. The two position adjustment parts are respectively used to engage with the two support parts and drive the two support parts to move to adjust the span between the two support parts. The distance adjustment component includes a worm, a worm gear and an adjustment gear. The first end of the worm meshes with the worm gear. The second end of the worm is used to receive an external force, so that the worm rotates along its own axis under the action of the external force to drive the worm gear to rotate. The worm gear is fixedly connected to the adjustment gear. The adjustment gear is in transmission connection with the two position adjustment parts. When the worm gear rotates, it drives the adjustment gear to rotate synchronously so that the two position adjustment parts move in opposite directions at the same speed simultaneously.
[0008] In some embodiments, both the worm and the worm gear are arranged inside the base, and the second end of the worm extends to the outside of the base.
[0009] In some embodiments, the worm extends along the width direction of the base. The two position adjustment parts are slidable along the length direction of the base.
[0010] In some embodiments, the distance adjustment component further includes two racks. Both of the two racks mesh with the adjustment gear. The two racks are slidably arranged on the base. When the adjustment gear rotates, the two racks move in opposite directions relative to the base at the same speed simultaneously. The two position adjustment parts are respectively connected to the two racks, and when the two racks move, they drive the two position adjustment parts to move synchronously.
[0011] In some embodiments, the bending test device further includes two parallel chutes arranged on the base. The two racks are respectively slidably connected to the two chutes.
[0012] In some embodiments, the position adjustment part is arranged at the end of the rack, and the position adjustment part is slidably connected to the chute.
[0013] In some embodiments, the bending test device further includes a sliding frame. One end of the sliding frame is slidably arranged in the chute, and the other end of the sliding frame extends out of the chute and is detachably connected to the position adjustment part.
[0014] In some embodiments, the adjustment gear is arranged in the middle of the base. The two position adjustment parts are respectively arranged at the outer ends of the two racks. When the distance between the two position adjustment parts is the largest, the outer end of the rack is farther from the adjustment gear than the inner end. During the process of the two position adjustment parts approaching each other, the outer end of the rack gradually approaches the adjustment gear, and the inner end of the rack gradually moves away from the adjustment gear.
[0015] In some embodiments, the loading head is located between two supporting parts and is higher than the two supporting parts. The bending test device further includes a positioning member. The positioning member is disposed on the base, and the positioning member and the position adjusting member are respectively located on different sides of the base. The positioning member is used to engage with the loading head during the process of the two position adjusting members respectively engaging with the two supporting parts to adjust the span between the two supporting parts.
[0016] In some embodiments, the positioning member is detachably connected to the base.
[0017] Based on the technical solution provided by the present application, the bending test device includes a bending test fixture and a distance adjusting device. The bending test fixture includes a fixture base, two supporting parts and a loading head. The two supporting parts and the loading head are all disposed on the fixture base. The positions of the two supporting parts relative to the fixture base are adjustable. The two supporting parts are used to support the bending test piece during the bending test. The loading head is used to apply pressure to the bending test piece to perform the bending test. The distance adjusting device includes a base, two position adjusting members and a distance adjusting assembly. The two position adjusting members are slidably disposed on the base. The two position adjusting members are respectively used to engage with the two supporting parts and drive the two supporting parts to move to adjust the span between the two supporting parts. The distance adjusting assembly includes a worm, a worm gear and an adjusting gear. The first end of the worm meshes with the worm gear. The second end of the worm is used to receive an external force, so that the worm rotates along its own axis under the action of the external force to drive the worm gear to rotate. The worm gear is fixedly connected to the adjusting gear. The adjusting gear is in transmission connection with the two position adjusting members. When the worm gear rotates, it drives the adjusting gear to rotate synchronously so that the two position adjusting members move in opposite directions at the same speed simultaneously. Through the distance adjusting device, the span between the two supporting parts can be quickly adjusted, ensuring that the displacement amounts of the two supporting parts are equal, achieving equal-distance adjustment, and ensuring the accuracy of the bending test. And based on the self-locking effect of the worm gear and the worm, the position stability of the position adjusting member after adjusting the span is improved, the risk that the two position adjusting members drive the supporting parts to generate unexpected displacements due to accidental shaking is reduced, and the accuracy of the bending test result is improved.
[0018] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:
[0020] Figure 1 is a schematic diagram of the bending test device according to some embodiments of the present application.
[0021] Figure 2 is Figure 1 a bottom view of the distance adjusting device in
[0022] Figure 3 is Figure 1 the front view partial sectional view of the distance adjustment device in
[0023] Figure 4 is Figure 1 the side view partial sectional view of the distance adjustment device in Specific embodiments
[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.
[0025] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0026] For the sake of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" and the like may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, the device described as "above other devices or structures" or "over other devices or structures" will then be oriented "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." may include both the orientation of "above..." and "below...". The device may be otherwise oriented, and corresponding interpretations may be made to the spatial relative descriptions used herein.
[0027] Refer toFigure 1 , some embodiments of the present application provide a bending test device, including a bending test fixture and a distance adjustment device. The bending test fixture includes a fixture base 7, two support parts 9 and a loading head 10. The two support parts 9 and the loading head 10 are both arranged on the fixture base. The positions of the two support parts 9 relative to the fixture base 7 are adjustable. The two support parts 9 are used to support the bending test piece during the bending test. The loading head 10 is used to apply pressure to the bending test piece to conduct the bending test. The distance adjustment device includes a base 1, two position adjustment parts 2 and a distance adjustment component 3. The two position adjustment parts 2 are slidably arranged on the base 1. The two position adjustment parts 2 are respectively used to engage with the two support parts 9 and drive the two support parts 9 to move to adjust the span of the two support parts 9. The distance adjustment component 3 includes a worm 31, a worm gear 32 and an adjustment gear 33. The first end of the worm 31 meshes with the worm gear 32. The second end of the worm 31 is used to receive an external force, so that the worm 31 rotates along its own axis under the action of the external force to drive the worm gear 32 to rotate. The worm gear 32 is fixedly connected to the adjustment gear 33. The adjustment gear 33 is in transmission connection with the two position adjustment parts 2. When the worm gear 32 rotates, it drives the adjustment gear 33 to rotate synchronously so that the two position adjustment parts 2 move in opposite directions at the same speed simultaneously.
[0028] Specifically, the bending test device provided by the embodiments of the present application is applicable to the three-point bending test. The loading head 10 is located between the two support parts 9, and the two support parts 9 are symmetric about the loading head 10. According to different requirements for the span in the bending test, it is necessary to increase or decrease the distance between the support part 9 and the loading head 10. The distance adjustment device can realize the rapid adjustment of the span of the two support parts 9, ensure that the displacement amounts of the two support parts 9 are equal, realize the equal-distance adjustment, and ensure the accuracy of the bending test. And based on the self-locking effect of the worm gear 32 and the worm 31, the position stability of the position adjustment part 2 after adjusting the span is improved, and the risk that the two position adjustment parts 2 drive the support part 9 to generate an undesired displacement due to accidental shaking is reduced, and the accuracy of the bending test result is improved.
[0029] In order to streamline the structure of the distance adjustment device, referring to Figure 3 , in some embodiments, both the worm 31 and the worm gear 32 are arranged inside the base 1, and the second end of the worm 31 extends to the outside of the base 1. This can reduce the interference of the worm 31 and the worm gear 32 on the position adjustment part 2 in terms of structure, and can leave space for arranging the adjustment gear 33.
[0030] In some embodiments, a knob is arranged at the second end of the worm 31, which is convenient for the test personnel to apply a force and rotate the worm 31.
[0031] In some embodiments, the worm 31 extends along the width direction of the base 1. The two position adjustment parts 2 are slidable along the length direction of the base 1.
[0032] Specifically, the base 1 is a rectangular plate-like member. The worm 31 is rotatably disposed within the base 1. The worm gear 32 is disposed inside the base 1 and is located at the center of the base 1. The worm 31 meshes with the worm gear 32 from the side of the worm gear 32. The rotation plane of the worm 31 is perpendicular to the width direction of the base 1, and the rotation plane of the worm gear 32 is perpendicular to the thickness direction of the base 1. The adjusting gear 33 is rotatably disposed on the bottom surface of the base 1, and the worm gear 32 and the adjusting gear 33 are coaxially disposed, such that the rotation plane of the adjusting gear 33 is parallel to the rotation plane of the worm gear 32.
[0033] Reference Figure 2 , in some embodiments, the distance adjusting assembly 3 further includes two racks 34. Both of the two racks 34 mesh with the adjusting gear 33. The two racks 34 are slidably disposed on the base 1. When the adjusting gear 33 rotates, the two racks 34 simultaneously move in opposite directions relative to the base 1 at the same speed. The two positioning members 2 are respectively connected to the two racks 34. When the two racks 34 move, they drive the two positioning members 2 to move synchronously.
[0034] Specifically, the extending direction of the rack 34 is consistent with the length direction of the base 1, and the two racks 34 are symmetrically disposed on both sides of the adjusting gear 33 in the width direction of the base 1, such that when the adjusting gear 33 rotates, the displacement amounts of the two racks 34 are equivalent, thereby improving the speed and accuracy of span adjustment.
[0035] In some embodiments, the bending test device further includes two parallel chutes 4 disposed on the base 1. The two racks 34 are respectively slidably connected to the two chutes 4.
[0036] The chute 4 is disposed on the bottom surface of the base 1. The rack 34 is slidably connected to the chute 4 through a slider, thereby improving the smoothness of the movement of the rack 34 relative to the base 1. In some embodiments, the positioning member 2 is disposed at the end of the rack 34, and the positioning member 2 is slidably connected to the chute 4.
[0037] Specifically, the surface of the positioning member 2 facing the adjusting gear 33 is connected to the end face of the end of the rack 34. Compared with the solution of connecting the positioning member 2 to other positions of the rack 34, the adjustment range of the distance between the two positioning members 2 can be increased, the span of the two supporting portions 9 can be adjusted within a large range, thereby improving the feasibility of the bending test device and meeting diverse test requirements.
[0038] In some embodiments, the positioning member 2 is provided with a groove, and the supporting portion 9 is provided with a protrusion. The groove and the protrusion are adapted in shape to facilitate the engagement of the positioning member 2 and the supporting portion 9. In some embodiments, the groove is a triangular groove and the protrusion is a triangular protrusion.
[0039] Reference Figure 4, in some embodiments, the bending test device further includes a sliding carriage 5. One end of the sliding carriage 5 is slidably disposed in the chute 4. The other end of the sliding carriage 5 extends out of the chute 4 and is detachably connected to the positioning member 2.
[0040] Specifically, Figure 4 shows a sectional view of the connecting portion of the sliding carriage 5 of the positioning member 2. The size of the opening section of the chute 4 is smaller than that of the bottom section. The sliding carriage 5 is configured as a T-shaped structural member, so that the sliding carriage 5 and the chute 4 are adapted in contour, and the stability of the sliding carriage 5 sliding in the chute 4 can be improved. The part of the sliding carriage 5 extending out of the chute 4 is inserted into the positioning member 2, and the sliding carriage 5 is snap-connected or thread-connected to the positioning member 2, thereby realizing detachability, facilitating the replacement of the positioning member 2, and improving convenience.
[0041] In other embodiments, one end of the sliding carriage 5 is slidably disposed in the chute 4. The other end of the sliding carriage 5 extends out of the chute 4 and is connected to one end of the connecting plug A, and the other end of the connecting plug A is thread-connected to the positioning member 2.
[0042] In some embodiments, the adjusting gear 33 is disposed in the middle of the base 1. The two positioning members 2 are respectively disposed at the outer ends of the two racks 34. When the distance between the two positioning members 2 is the largest, the outer end of the rack 34 is farther from the adjusting gear 33 than the inner end. During the process of the two positioning members 2 approaching each other, the outer end of the rack 34 gradually approaches the adjusting gear 33, and the inner end of the rack 34 gradually moves away from the adjusting gear 33.
[0043] Specifically, as Figure 2 shown, at this time the distance between the two positioning members 2 reaches the maximum. If the adjusting gear 33 continues to rotate clockwise, the outer end of the rack 34 will continue to move away from the adjusting gear 33, resulting in the inner end of the rack 34 disengaging from the adjusting gear 33. If the adjusting gear 33 rotates counterclockwise, the outer end of the rack 34 will move towards the adjusting gear 33, and the two positioning members 2 will gradually approach.
[0044] Referring to Figure 1 , in some embodiments, the loading head 10 is located between the two supporting portions 9 and is higher than the two supporting portions 9. The bending test device further includes a positioning member 6. The positioning member 6 is disposed on the base 1, and the positioning member 6 and the positioning member 2 are respectively located on different sides of the base 1. The positioning member 6 is used to engage with the loading head 10 during the process of the two positioning members 2 respectively engaging the two supporting portions 9 to adjust the span of the two supporting portions 9.
[0045] Specifically, when adjusting the span after engaging the two position adjusting members 2 with the two supporting portions 9, since the loading head 10 and the fixture base 7 are relatively fixed, by adding a positioning member 6 for engaging with the loading head 10, when the worm 31 is screwed, it is ensured that the rack 34 can drive the supporting portion 9 to move relative to the fixture base 7 through the position adjusting member 2, while the base 1 and the fixture base 7 do not move relatively, improving the accuracy of span adjustment and the accuracy of test results.
[0046] In some embodiments, the positioning member 6 is detachably connected to the base 1. Specifically, Figure 4 The cross-sectional view showing the detachable connection portion of the positioning member 6 and the base 1 is shown. A connecting plug board A is provided on the top surface of the base 1. One end of the connecting plug board A is fixedly connected to the base 1, and the other end of the connecting plug board A is inserted into the positioning member 6. The connecting plug board A is engaged or threadedly connected with the positioning member 6, thereby realizing detachable connection, facilitating the replacement of the positioning member 6, and improving convenience.
[0047] In some embodiments, the loading head 10 has a triangular profile, and a triangular groove matching the profile of the loading head 10 is provided on the positioning member 6 to improve the stability after engagement.
[0048] Reference Figure 1 , in some embodiments, the bending test fixture includes a fixture chute 8 provided on the fixture base 7. The supporting portion 9 is slidably connected to the fixture chute 8 through a slider, so that the supporting portion 9 is slidable relative to the fixture base 7.
[0049] In some embodiments, scale lines are provided on the fixture base 7 to facilitate the tester to know the span of the two supporting portions 9.
[0050] The following briefly describes the usage process of the bending test fixture provided by the present application: First, assemble the bending test fixture and the distance adjusting device, engage the positioning member 6 with the loading head 10, and engage the two position adjusting members 2 with the two supporting portions 9. Then, according to the test requirements, screw the second end of the worm 31 to adjust the distance between the two supporting portions 9 to meet the span required for the test. After adjusting the span, remove the distance adjusting device, place the test piece on the bending test fixture, make the two supporting portions 9 abut against and support the test piece from the lower side of the test piece, and then start the testing machine to make the loading head 10 abut against the test piece from the upper side of the test piece and apply a force.
[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present application or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present application, they should all be covered within the scope of the technical solutions claimed in the present application.
Claims
1. A bending test device, characterized in that, Comprising: A bending test fixture, including a fixture base (7), two support parts (9) and a loading head (10). The two support parts (9) and the loading head (10) are both arranged on the fixture base. The positions of the two support parts (9) relative to the fixture base (7) are adjustable. The two support parts (9) are used to support a bending test piece during the bending test, and the loading head (10) is used to apply pressure to the bending test piece to conduct the bending test; And A distance adjustment device, including A base (1); Two position adjustment parts (2), slidably arranged on the base (1). The two position adjustment parts (2) are respectively used to engage with the two support parts (9) and drive the two support parts (9) to move to adjust the span of the two support parts (9); and A distance adjustment component (3), including a worm (31), a worm wheel (32) and an adjustment gear (33). The first end of the worm (31) meshes with the worm wheel (32). The second end of the worm (31) is used to receive an external force, so that the worm (31) rotates along its own axis under the action of the external force to drive the worm wheel (32) to rotate. The worm wheel (32) is fixedly connected to the adjustment gear (33). The adjustment gear (33) is in transmission connection with the two position adjustment parts (2). When the worm wheel (32) rotates, it drives the adjustment gear (33) to rotate synchronously so that the two position adjustment parts (2) move in opposite directions at the same speed simultaneously.
2. The bending test device according to claim 1, characterized in that, The worm (31) and the worm wheel (32) are both arranged inside the base (1), and the second end of the worm (31) extends to the outside of the base (1).
3. The bending test device according to claim 2, wherein The worm (31) extends along the width direction of the base (1), and the two position adjustment parts (2) are slidable along the length direction of the base (1).
4. The bending test device according to claim 1, characterized in that, The distance adjustment component (3) further includes two racks (34). The two racks (34) both mesh with the adjustment gear (33). The two racks (34) are slidably arranged on the base (1). When the adjustment gear (33) rotates, the two racks (34) move in opposite directions relative to the base (1) at the same speed simultaneously. The two position adjustment parts (2) are respectively connected to the two racks (34). When the two racks (34) move, they drive the two position adjustment parts (2) to move synchronously.
5. The bending test device according to claim 4, wherein, The bending test device further includes two parallel chutes (4) arranged on the base (1). The two racks (34) are respectively slidably connected to the two chutes (4).
6. The bending test device according to claim 5, characterized in that, The position adjustment part (2) is arranged at the end of the rack (34), and the position adjustment part (2) is slidably connected to the chute (4).
7. The bending test device according to claim 6, characterized in that, The bending test device further includes a sliding frame (5). One end of the sliding frame (5) is slidably arranged in the chute (4), and the other end of the sliding frame (5) extends out of the chute (4) and is detachably connected to the position adjustment part (2).
8. The bending test device according to claim 1, wherein, The adjusting gear (33) is arranged in the middle of the base (1), and the two adjusting members (2) are respectively arranged at the outer ends of the two racks (34). When the distance between the two adjusting members (2) is the largest, the outer end of the rack (34) is farther from the adjusting gear (33) than the inner end. During the process of the two adjusting members (2) approaching each other, the outer end of the rack (34) gradually approaches the adjusting gear (33), and the inner end of the rack (34) gradually moves away from the adjusting gear (33).
9. The bending test device according to any one of claims 1 to 8, characterized in that, The loading head (10) is located between the two supporting parts (9) and is higher than the two supporting parts (9). The bending test device further includes a positioning member (6). The positioning member (6) is arranged on the base (1), and the positioning member (6) and the adjusting member (2) are respectively located on different sides of the base (1). The positioning member (6) is used to engage with the loading head (10) during the process of the two adjusting members (2) respectively engaging with the two supporting parts (9) to adjust the span of the two supporting parts (9).
10. The bending test device according to claim 9, characterized in that, The positioning member (6) is detachably connected to the base (1).