A device for measuring bending deflection

Abstract

The utility model discloses a measurement device of bending deflection. The measurement device includes base, sleeve rod, its inside hollow, and with base adopts the mode of screwing and fixes, deflection rod, its collapsible along the axial direction of sleeve rod is located in sleeve rod, is used for measuring bending deflection displacement, through with base adopts the mode of screwing and fixes of sleeve rod, can realize only needs simple tool to can complete the disassembly and installation of sleeve rod fast, need not to destroy sleeve rod, and can realize stable connection, bears larger load, ensures the stability of sleeve rod.

Description

Technical Field

[0001] This utility model belongs to the field of bending deflection measurement technology, specifically, it relates to a bending deflection measuring device. Background Technology

[0002] For bending tests of composite materials, the bending deflection at the midpoint of the span is usually measured. The measurement result of bending deflection directly affects the results of bending modulus and bending strain, so the requirements for bending deflection are extremely high during testing. Existing technology discloses a bending deflection measuring fixture, including a sleeve. A protrusion is provided around the middle of the sleeve's outer surface for fixing it to a clamp. A groove is provided on the upper outer surface of the sleeve for fixing an extensometer. The sleeve is hollow inside and contains a piston rod for measuring bending deflection displacement. A top cap is threaded onto the piston rod, and a spring is located below. The sleeve is fixed to the clamp by the protrusion, which is inconvenient for disassembly and installation, and also results in the sleeve being not securely fixed to the clamp.

[0003] In view of the above, this utility model is hereby proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a bending deflection measuring device. By fixing the sleeve rod and the base together by screwing, the sleeve rod can be quickly disassembled and installed with simple tools without damaging it, and a stable connection can be achieved to withstand large loads and ensure the stability of the sleeve rod.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a device for measuring bending deflection, comprising:

[0007] Base;

[0008] The sleeve rod is hollow inside and is fixed to the base by screw connection;

[0009] A deflection rod, which is telescopically installed inside the sleeve along the axial direction of the sleeve, is used to measure bending deflection displacement.

[0010] Furthermore, the outer peripheral wall of the sleeve is provided with external threads;

[0011] The sleeve is connected to the base thread via external thread.

[0012] Furthermore, the base is provided with a first insertion hole;

[0013] The sleeve is inserted into the first insertion hole and then screwed to the base via external threads after insertion.

[0014] Furthermore, one end of the first insertion hole is open, and the other end is closed;

[0015] One end of the sleeve is inserted through the open end of the first insertion hole and abuts against the closed end of the first insertion hole, while the other end is located outside the first insertion hole;

[0016] A nut that mates with an external thread is fitted on the outer peripheral wall of the sleeve located outside the first insertion hole;

[0017] The nut abuts against the base and is screwed into the external thread.

[0018] Furthermore, the external threads on the outer peripheral wall of the sleeve extend from one end of the sleeve to the other end.

[0019] Furthermore, the nut that is screwed into the external thread is a hexagonal nut.

[0020] Furthermore, the base includes a support portion and a connector portion arranged coaxially;

[0021] The radial dimension of the support part is larger than the radial dimension of the insertion part;

[0022] The sleeve is inserted into the support part and the insertion part in sequence;

[0023] The nut abuts against the support.

[0024] Furthermore, it also includes a measuring platform, which is provided with a second insertion hole;

[0025] The connector is inserted into the second connector hole, and the support part supports and abuts against the measuring platform.

[0026] Furthermore, the measuring platform is provided with two opposing support bosses that support the part to be measured;

[0027] The second insertion hole is located on the measuring platform between the two support bosses.

[0028] Furthermore, the hollow interior of the sleeve forms a receiving cavity;

[0029] The cavity is open at one end and closed at the other.

[0030] One end of the deflection rod is inserted into the cavity through the open end of the cavity and connected to the closed end of the cavity by a spring. The other end is located outside the cavity and is provided with a top cap for contacting the part to be measured.

[0031] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0032] 1. By fixing the sleeve rod to the base with screws, the sleeve rod can be quickly disassembled and installed with simple tools without damaging it. It also achieves a stable connection, can withstand large loads, and ensures the stability of the sleeve rod.

[0033] 2. By providing a first insertion hole on the base for inserting the sleeve rod, the sleeve rod is screwed to the base via an external thread after being inserted into the first insertion hole. The first insertion hole has a pre-positioning function for the screwing connection between the sleeve rod and the base, which can speed up the assembly efficiency of the sleeve rod and the base. Furthermore, the insertion structure formed by the sleeve rod and the first insertion hole can withstand radial loads, provide bending support, and avoid stress concentration at the threaded connection.

[0034] 3. By dividing the base into a support part and a plug-in part, the base is supported on the measuring platform of the measuring device by the support part, and plugged into the second plug-in hole on the measuring platform by the plug-in part, thereby improving the stability of the base on the measuring device and thus improving the accuracy of the measurement.

[0035] 4. By setting two opposing support bosses on the measuring platform to support the workpiece to be measured, support can be provided for the workpiece to be measured, preventing the workpiece from being held by hand during measurement, preventing deformation of the workpiece to be measured, and improving the accuracy of measurement.

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0037] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0038] Figure 1 A schematic diagram of the structure of a bending deflection measuring device provided in one embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the deflection rod provided in an embodiment of the present utility model;

[0040] Figure 3 A schematic diagram of the sleeve rod provided in an embodiment of this utility model;

[0041] Figure 4 A schematic diagram of the nut provided in an embodiment of this utility model;

[0042] Figure 5 A schematic diagram of the structure of a bending deflection measuring device provided in another embodiment of this utility model.

[0043] Icons: 1-Base; 11-Support; 12-Plug-in; 2-Deflection rod; 21-Top cap; 3-Sleeve rod; 31-External thread; 4-Nut; 5-Spring; 6-Measuring platform; 61-Support boss.

[0044] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0046] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a device for measuring bending deflection, comprising:

[0049] Base 1;

[0050] The sleeve rod 3 is hollow inside and is fixed to the base 1 by screw connection;

[0051] The deflection rod 2 is telescopically installed inside the sleeve 3 along the axial direction of the sleeve 3 and is used to measure bending deflection displacement.

[0052] In this embodiment of the invention, by fixing the sleeve rod 3 to the base 1 with a screw connection, the sleeve rod 3 can be quickly disassembled and installed using only simple tools without damaging it. This also ensures a stable connection, allows it to withstand large loads, and guarantees the stability of the sleeve rod 3. The axial direction of the sleeve rod 3 described in this application is... Figure 1 The up and down directions in the middle.

[0053] The sleeve rod 3 is hollow inside and is threaded to the base 1, which can solve the problem of vibration and loosening;

[0054] Specifically, the sleeve 3 has a hollow interior forming a receiving cavity;

[0055] The cavity is open at one end and closed at the other.

[0056] One end of the deflection rod 2 is inserted into the cavity through the open end of the cavity and connected to the closed end of the cavity via a spring 5. The other end is located outside the cavity and is provided with a top cap 21 for contacting the part to be measured.

[0057] The receiving cavity extends axially along the sleeve 3, and the top cap 21 is provided with a spherical contact head to reduce frictional errors with the surface of the workpiece to be measured. The deflection rod 2 can move telescopically within the sleeve 3 via a spring 5;

[0058] During bending deflection measurement, the lower surface of the workpiece is placed against the top cap 21, and the workpiece is pressed downwards, causing the deflection rod 2 to move downwards. The downward displacement of the deflection rod 2 is the bending deflection of the workpiece. A plastic collar is provided between the deflection rod 2 and the sleeve rod 3 to ensure tight contact between them. The displacement can be measured manually or using a displacement sensor.

[0059] In this embodiment of the utility model, the outer peripheral wall of the sleeve rod 3 is provided with an external thread 31;

[0060] The sleeve rod 3 is threaded to the base 1 via the external thread 31.

[0061] In the embodiments of this utility model, the external thread 31 on the sleeve rod 3 is directly screwed into the internal thread hole provided on the base 1 to realize the screw connection between the sleeve rod 3 and the base 1. Alternatively, the external thread 31 on the sleeve rod 3 can be screwed to the base 1 with the help of the nut 4, etc.

[0062] Specifically, the base 1 is provided with a first insertion hole;

[0063] The sleeve 3 is inserted into the first insertion hole, and after being inserted into the first insertion hole, it is screwed to the base 1 via the external thread 31.

[0064] The axis of the first insertion hole extends along the axial direction of the sleeve 3;

[0065] The first insertion hole has a pre-positioning function for the screw connection between the sleeve 3 and the base 1, which can speed up the assembly efficiency of the sleeve 3 and the base 1.

[0066] The insertion structure formed by the sleeve 3 and the first insertion hole can withstand radial loads, provide bending support, and avoid stress concentration at the threaded connection. Compared with the axial tensile force borne by the threaded connection between the sleeve 3 and the base 1, it increases the bearing capacity, further increases the stability of the sleeve 3 on the base 1, increases the bending resistance of the sleeve 3, enhances the bearing capacity of the connection between the two, and prevents the connection from being easily broken due to excessive vibration during the measurement process.

[0067] Furthermore, one end of the first insertion hole is open, and the other end is closed;

[0068] One end of the sleeve 3 is inserted through the open end of the first insertion hole and abuts against the closed end of the first insertion hole, while the other end is located outside the first insertion hole;

[0069] A nut 4 that mates with the external thread 31 is fitted on the outer peripheral wall of the sleeve 3 located outside the first insertion hole;

[0070] Nut 4 abuts against base 1 and is screwed into external thread 31.

[0071] like Figure 1 As shown, both the first insertion hole and the receiving cavity are open upwards;

[0072] The nut 4 that is screwed into the external thread 31 in this application is a hexagonal nut. The hexagonal nut 4 can increase the contact area and improve the anti-loosening performance due to its hexagonal structure. An elastic washer and a hexagonal nut 4 are sequentially fitted on the thread of the sleeve rod 3. The combination of the spring 5 washer and the hexagonal nut 4 has higher anti-vibration and anti-loosening performance.

[0073] In detail, the sleeve 3 of this application is cylindrical and hollow inside;

[0074] The hexagonal nut is ring-shaped, with its inner circumference being circular and fitting the outer circumference of the sleeve. The outer circumference of the hexagonal nut is hexagonal.

[0075] Specifically, such as Figure 1 As shown, the surface of the nut 4 that abuts against the base 1 is the top surface of the base 1. The top surface of the base 1 is recessed downward to form a positioning recess, and the elastic washer is embedded in the positioning recess.

[0076] As one embodiment, the external thread 31 on the outer peripheral wall of the sleeve 3 extends from one end of the sleeve 3 to the other end, so that the outer peripheral wall of the sleeve 3 covers the external thread 31.

[0077] In an embodiment of this utility model, the base 1 includes a support portion 11 and a plug portion 12 arranged coaxially;

[0078] The radial dimension of the support portion 11 is larger than the radial dimension of the insertion portion 12;

[0079] The sleeve rod 3 is inserted into the support part 11 and the insertion part 12 in sequence;

[0080] Nut 4 abuts against support part 11.

[0081] In embodiments of this utility model, such as Figure 1 As shown, the support part 11 is located above the insertion part 12. The base 1 is columnar. The support part 11 and the insertion part 12 are coaxially arranged. The support part 11 is provided with an upper opening, the upper end of which is open and the lower end of which is open. The insertion part 12 is provided with a lower opening, the upper end of which is open and the lower end of which is closed. The upper opening and the lower opening are coaxially arranged and have equal radial dimensions. The upper opening and the lower opening form the first insertion hole.

[0082] The base 1 is supported on a component of the measuring device by the support part 11. The base 1 is connected to a component of the measuring device by the plug part 12, which improves the stability of the base 1 on the measuring device and thus improves the accuracy of the measurement.

[0083] Furthermore, it also includes a measuring platform 6, which is provided with a second insertion hole;

[0084] The connector 12 is inserted into the second connector hole, and the support 11 is supported and abutted against the measuring platform 6.

[0085] The insertion part 12 and the support part 11 enable the base 1 to be supported and inserted into the measuring device;

[0086] Specifically, the upper end of the second insertion hole is open, the lower end of the second insertion hole is closed, the axis of the second insertion hole extends along the axial direction of the sleeve 3, and the bottom of the insertion part 12 abuts against the closed end of the second insertion hole.

[0087] The second insertion hole, the receiving cavity, and the first insertion hole are coaxially arranged to improve the compactness of the device;

[0088] The support part 11 abuts against the top surface of the measuring platform 6.

[0089] like Figure 5 As shown in the embodiment of this utility model, the measuring platform 6 is provided with two opposing support bosses 61 that support the part to be measured;

[0090] The second insertion hole is located on the measuring platform 6 between the two supporting bosses 61.

[0091] In embodiments of this utility model, such as Figure 1As shown, two support bosses 61 are arranged opposite each other and spaced apart. The base 1 is inserted into and supported on the measuring platform 6 between the two support bosses 61 through the insertion part 12 and the support part 11. The radial dimension of the support part 11 is larger than the radial dimension of the insertion part 12, so that the insertion part 12 can be inserted into the second insertion hole and the support part 11 can be supported on the measuring platform 6.

[0092] When measuring bending deflection, the part to be measured is placed on the support boss 61 and then pressed down. The part to be measured can be a material plate made of a certain material.

[0093] The support boss 61 is configured to provide support for the part to be measured, prevent the part to be measured from being held by hand during measurement, prevent the part to be measured from being deformed, and improve the accuracy of measurement.

[0094] The first insertion hole, the second insertion hole, and the receiving cavity are not shown in the figure.

[0095] The supporting boss 61 is L-shaped, such as Figure 5 As shown, the support boss on the left includes a first vertical part and a first horizontal part, and the support boss on the right includes a second vertical part and a second horizontal part.

[0096] The first vertical section and the second vertical section are arranged opposite to each other and spaced apart, and the second insertion hole is provided on the measuring platform between the first vertical section and the second vertical section;

[0097] The first vertical section and the second vertical section bend in opposite directions to form the first horizontal section and the second horizontal section, respectively;

[0098] The first vertical part and the second vertical part support the part to be measured. The first horizontal part and the second horizontal part are respectively attached to the measuring platform and fixedly connected to the measuring platform 6. The first horizontal part and the second horizontal part increase the contact area between the two supporting bosses 61 and the measuring platform 1, thereby increasing the stability of the supporting bosses on the measuring platform 6, and thus improving the stability of the part to be measured during measurement.

[0099] When installing the measuring device of this application, first insert the deflection rod into the receiving cavity of the sleeve rod and connect it to the sleeve rod through a spring; then insert the sleeve rod into the first insertion hole, and use a tool to rotate the nut on the sleeve rod so that the nut abuts against the base and is screwed into the external thread on the screw rod; finally, insert the insertion part of the base equipped with the deflection rod and the sleeve rod into the second insertion hole of the measuring platform, and at the same time, abut against and support the base on the measuring platform.

[0100] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A device for measuring bending deflection, characterized in that, include: Base; The sleeve rod is hollow inside and is fixed to the base by screw connection; A deflection rod, which is telescopically installed inside the sleeve along the axial direction of the sleeve, is used to measure bending deflection displacement.

2. The measuring device according to claim 1, characterized in that, The outer peripheral wall of the sleeve is provided with external threads; The sleeve is connected to the base thread via external thread.

3. The measuring device according to claim 2, characterized in that, The base is provided with a first insertion hole; The sleeve is inserted into the first insertion hole and then screwed to the base via external threads after insertion.

4. The measuring device according to claim 3, characterized in that, The first connector is open at one end and closed at the other. One end of the sleeve is inserted through the open end of the first insertion hole and abuts against the closed end of the first insertion hole, while the other end is located outside the first insertion hole; A nut that mates with an external thread is fitted on the outer peripheral wall of the sleeve located outside the first insertion hole; The nut abuts against the base and is screwed into the external thread.

5. The measuring device according to claim 2, characterized in that, The external thread on the outer circumferential wall of the sleeve extends from one end of the sleeve to the other.

6. The measuring device according to claim 4, characterized in that, Hexagonal nuts are used for connection with external threads.

7. The measuring device according to claim 4, characterized in that, The base includes a support part and a plug-in part arranged coaxially; The radial dimension of the support part is larger than the radial dimension of the insertion part; The sleeve is inserted into the support part and the insertion part in sequence; The nut abuts against the support.

8. The measuring device according to claim 7, characterized in that, It also includes a measuring platform, which is equipped with a second insertion hole; The connector is inserted into the second connector hole, and the support part supports and abuts against the measuring platform.

9. The measuring device according to claim 8, characterized in that, The measuring platform is equipped with two opposing support bosses that support the part to be measured; The second insertion hole is located on the measuring platform between the two support bosses.

10. The measuring device according to any one of claims 1-9, characterized in that, The sleeve has a hollow interior forming a receiving cavity; The cavity is open at one end and closed at the other. One end of the deflection rod is inserted into the cavity through the open end of the cavity and connected to the closed end of the cavity by a spring. The other end is located outside the cavity and is provided with a top cap for contacting the part to be measured.

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