Adjustable clamp

Abstract

The utility model discloses an adjustable clamp which comprises a supporting assembly, a clamping assembly and a clamping assembly. The supporting assembly comprises a bottom plate and a plurality of supporting columns vertically and evenly distributed on the top of the bottom plate. The clamping assembly comprises a plurality of first clamping mechanisms installed on the supporting column and a plurality of second clamping mechanisms evenly distributed on the bottom plate, and each first clamping mechanism comprises a first installation base, a first ball head rod, a first clamping block and a first lockable spherical hinge structure; the second clamping mechanism comprises a second mounting seat, a second ball head rod, a second clamping block and a second lockable spherical hinge structure, and the angles and shapes of the first clamping mechanism and the second clamping mechanism are changed by adjusting the first lockable spherical hinge structure and the second lockable spherical hinge structure, so that the composite material components with different sizes, shapes and structures are clamped; and the shape of the clamped composite material component can be freely controlled, so that impact clamping of different positions of the composite material is met, the efficiency of an impact test is improved, and the test cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of composite material impact test fixture, and specifically relates to an adjustable fixture. BACKGROUND

[0002] Composite materials have many advantages such as high specific strength, high specific stiffness, strong designability, good fatigue resistance, and are widely used in aerospace, construction, transportation and other fields. However, during the service of composite components, they will inevitably be impacted by various external objects, such as tool falling, gravel, animal impact and daily bumping, etc. Such impact may cause fiber breakage, matrix cracking, delamination and other interlaminar and interlayer damage in the composite components, changing the structural strength, reliability and stability of the composite components, and seriously affecting their service safety.

[0003] Therefore, the impact performance of composite materials has been widely valued and researched. However, the existing composite material impact test fixtures are mostly customized for a certain specific shape, and cannot meet the clamping needs of various composite materials. Secondly, the existing composite material fixtures are mostly horizontally centered clamped, and the impact position is fixed at the center of the composite component, which cannot meet the needs of simulating the complex impact conditions of the composite material during service. SUMMARY

[0004] The utility model aims at least to solve one of the technical problems existing in the prior art. To this end, the utility model provides an adjustable fixture, which solves the problem that the existing composite material impact test fixture is designed for a certain specific shape, cannot meet the clamping needs of various composite materials, and the clamping position is only horizontally centered clamped, and cannot simulate complex impact conditions.

[0005] According to the adjustable fixture of the utility model embodiment first aspect, comprising:

[0006] The support assembly comprises a bottom plate and a plurality of support columns, and the plurality of support columns are vertically and uniformly distributed on the top of the bottom plate.

[0007] The clamping assembly comprises a plurality of first clamping mechanisms and a plurality of second clamping mechanisms, the plurality of first clamping mechanisms are respectively installed on the plurality of support columns, and the plurality of second clamping mechanisms are uniformly distributed on the top surface of the bottom plate. The first clamping mechanism comprises a first mounting seat, a first ball head rod, a first clamping block and a first lockable ball hinge structure. The two ends of the first ball head rod are respectively connected with the first mounting seat and the first clamping block through the first lockable ball hinge structure. The first mounting seat is connected with the support column. The second clamping mechanism comprises a second mounting seat, a second ball head rod, a second clamping block and a second lockable ball hinge structure. The two ends of the second ball head rod are respectively connected with the second mounting seat and the second clamping block through the second lockable ball hinge structure. The second mounting seat is connected with the bottom plate.

[0008] The adjustable clamp has at least the following beneficial effects:

[0009] According to different sizes and shapes of the composite material component to be tested, the first lockable ball hinge structure on the first clamping mechanism and the second lockable ball hinge structure on the second clamping mechanism are adjusted, the positions and angles of the first clamping block and the second clamping block are changed, the first clamping mechanism and the second clamping mechanism are in contact with the composite material component, the first clamping block and the second clamping block are respectively attached to the two sides of the composite material component, and forces in opposite directions are respectively applied to the composite material component, so that the composite material component is fixed and clamped, the angles and shapes of the first clamping mechanism and the second clamping mechanism are changed, different sizes and shapes of the composite material component are clamped, and the shape of the clamped composite material component can be controlled to meet the impact clamping of different positions of the composite material.

[0010] According to some embodiments of the utility model, the first ball head rod and the second ball head rod are respectively telescopic rod structures.

[0011] According to some embodiments of the utility model, the first mounting seat is movably arranged along the support column.

[0012] According to some embodiments of the utility model, the first mounting seat is movably arranged along the support column.

[0013] According to some embodiments of the utility model, the second mounting seat is movably adjusted and mounted on the bottom plate.

[0014] According to some embodiments of the utility model, the bottom plate is provided with a plurality of first threaded holes uniformly distributed, and the second mounting seat is provided with a first threaded joint screwedly connected with the first threaded hole.

[0015] According to some embodiments of the utility model, the bottom plate has opposite first and second side edges, the first and second side edges are sequentially and spaced apart relative to each other along the length direction of the bottom plate, the plurality of support columns are uniformly distributed on the first and second side edges, and the plurality of second clamping mechanisms are mounted between the first and second side edges.

[0016] According to some embodiments of the utility model, the number of the plurality of first clamping mechanisms and the plurality of second clamping mechanisms is one-to-one corresponding, and the first clamping block and the second clamping block are oppositely arranged on the two sides of the composite material component.

[0017] According to some embodiments of the utility model, the bottom plate is provided with a plurality of second threaded holes uniformly distributed, and the support column is provided with a second threaded joint connected with the second threaded hole.

[0018] According to some embodiments of the present application, the first clamping block and the second clamping block are provided with a contact layer, and the contact layer is a soft member.

[0019] Other features and advantages of the present application will be described in the following description, and become apparent from the description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0021] Figure 1 A front view of one embodiment of the adjustable clamp provided by the present application;

[0022] Figure 2 A top view of one embodiment of the adjustable clamp provided by the present application;

[0023] Figure 3 A schematic view of one embodiment of the adjustable clamp provided by the present application when clamping an L-shaped composite material member at the center;

[0024] Figure 4 A schematic view of one embodiment of the adjustable clamp provided by the present application when clamping an L-shaped composite material member at the center;

[0025] LIST OF ELEMENTS

[0026] Support assembly 100; bottom plate 110; first threaded hole 111; second threaded hole 112; support column 120; second threaded joint 121;

[0027] Clamping assembly 200; first clamping mechanism 210; first mounting seat 211; first ball head rod 212; first clamping block 213; first lockable ball hinge structure 214; fixing bolt 215; contact layer 216; second clamping mechanism 220; second mounting seat 221; second ball head rod 222; second clamping block 223; second lockable ball hinge structure 224; first threaded joint 225;

[0028] Composite material member 300. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the utility model, it needs to be understood that, when the orientation description such as upper, lower and the like is referred to, the orientation or positional relationship based on the orientation or positional relationship shown in the drawing is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as limiting the utility model.

[0031] In the description of the utility model, multiple means two or more than two. If the first, second is described, it is only for the purpose of distinguishing technical features, and can not be understood as indicating or suggesting relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0032] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation and connection should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0033] The technical scheme of the utility model will be described clearly and completely in combination with the drawings below. Obviously, the following described embodiments are part of the embodiments of the utility model, not all embodiments.

[0034] Composite materials have many advantages, such as high specific strength, high specific stiffness, strong designability, good fatigue resistance, etc., and are widely used in aerospace, construction, transportation and other fields. However, during the service of composite material components, they will inevitably be impacted by various external objects, such as tool falling, stone, animal impact and daily knock, etc. Such impact may cause fiber breakage, matrix cracking, delamination and other interlaminar and interlaminar damage inside the composite material components, change the structural strength, reliability and stability of the composite material components, and seriously affect their service safety.

[0035] Therefore, the impact performance of composite materials has been widely valued and researched, but the existing composite material impact test fixtures are mostly customized for a certain specific shape, and cannot meet the clamping needs of various composite material special-shaped parts. Secondly, the existing composite material fixtures are mostly horizontally centered clamped, and the impact position is fixed as the center of the appearance of the composite material component, which cannot meet the needs of simulating the complex impact conditions of the composite material during the service process.

[0036] Reference Figure 1 、 Figure 2 、 Figure 3 And Figure 4 , a kind of adjustable fixture of the utility model is as follows:

[0037] A kind of adjustable fixture of the utility model embodiment includes support assembly 100 and clamping assembly 200.

[0038] The support assembly 100 comprises a base plate 110 and a support column 120. The base plate 110 is located at the bottom of the adjustable clamp and provides mounting positions for other components, thereby playing a supporting and bearing role, lowering the center of gravity and improving the stability and reliability of the clamp.

[0039] The support column 120 is provided with a plurality of vertical support columns arranged on the base plate 110. As shown in the figure, the base plate 110 has a first side edge and a second side edge opposite to each other along the length direction, i.e. the left side edge and the right side edge in the figure. In order to balance the force on the composite material member 300 when it is clamped, the support column 120 is divided into two groups, which are evenly distributed along the first side edge and the second side edge respectively. The composite material member 300 to be tested and the clamping assembly 200 are located between the first side edge and the second side edge. In this embodiment, the support column 120 is provided with four support columns, two of which are arranged on the first side edge and the second side edge respectively. Figure 2 As shown in the figure, the base plate 110 of this embodiment is provided with a plurality of threaded holes, including a first threaded hole 111 and a second threaded hole 112.

[0040] Figure 2 The second threaded hole 112 is mainly used for the installation and adjustment of the support column 120. A plurality of second threaded holes 112 are evenly arranged on the side of the first side edge and the second side edge. The support column 120 is provided with a second threaded joint 121 matched with the second threaded hole 112. The support column 120 is detachably mounted on the base plate 110 through the threaded structure. Different numbers of support columns 120 can be selected to be mounted on different second threaded holes 112 to adjust the spacing between the support columns 120 and the number of support columns 120, so as to adapt to different sizes of the composite material member 300 to be tested.

[0041] The clamping assembly 200 of this embodiment comprises a first clamping mechanism 210 and a second clamping mechanism 220. The first clamping mechanism 210 is mounted on the support column 120, and the second clamping mechanism 220 is mounted on the base plate 110. The number of the first clamping mechanism 210 and the second clamping mechanism 220 corresponds to each other, and they are arranged opposite to each other on both sides of the composite material member 300 to be tested. The pressure acting on the composite material member 300 is perpendicular to the surface of the composite material member 300, which reduces the impact on the impact test and improves the accuracy of the impact test. In this embodiment, the first clamping mechanism 210 and the second clamping mechanism 220 are provided with four clamping mechanisms respectively. In actual operation, the number of the first clamping mechanism 210 and the second clamping mechanism 220 can be adjusted according to the clamping requirements of the composite material member 300.

[0042] The clamping assembly 200 of this embodiment comprises a first clamping mechanism 210 and a second clamping mechanism 220. The first clamping mechanism 210 is mounted on the support column 120, and the second clamping mechanism 220 is mounted on the base plate 110. The number of the first clamping mechanism 210 and the second clamping mechanism 220 corresponds to each other, and they are arranged opposite to each other on both sides of the composite material member 300 to be tested. The pressure acting on the composite material member 300 is perpendicular to the surface of the composite material member 300, which reduces the impact on the impact test and improves the accuracy of the impact test. In this embodiment, the first clamping mechanism 210 and the second clamping mechanism 220 are provided with four clamping mechanisms respectively. In actual operation, the number of the first clamping mechanism 210 and the second clamping mechanism 220 can be adjusted according to the clamping requirements of the composite material member 300. ​

[0043] The first clamping mechanism 210 comprises a first mounting seat 211, a first ball head rod 212, a first clamping block 213 and a first lockable spherical hinge structure 214. The spherical hinge structure is a common fixed structure for rotational connection between two components. The first lockable spherical hinge structure 214 is provided with two, one end of the first ball head rod 212 is rotationally connected with the first mounting seat 211 through the first lockable spherical hinge structure 214, and the other end of the first ball head rod 212 is rotationally connected with the first clamping block 213 through the first lockable spherical hinge structure 214, thereby forming the first clamping mechanism 210 with a large motion range and accurate adjustment.

[0044] The first ball head rod 212 can be spherically rotated relative to the first mounting seat 211 and fixed at a suitable position, so that the first clamping block 213 can be close to the composite material component 300. The first clamping block 213 can be spherically rotated relative to the first ball head rod 212 and fixed at a suitable position, so that the end surface of the first clamping block 213 can be closely attached to the surface of the composite material component 300, thereby increasing the contact area between the first clamping block 213 and the composite material component 300 and effectively improving the clamping effect. In other embodiments, the flexible movement of the first clamping block 213 in multiple degrees of freedom can be achieved by other structures, such as a turntable, a rotating shaft, etc.

[0045] The first ball head rod 212 is a telescopic rod structure, and the first ball head rod 212 can be axially telescopic. In use, the length of the first ball head rod 212 is adjusted according to the size of the composite material component 300 and the position of the first clamping block 213. The telescopic rod structure can be a pure mechanical structure, which is adjusted manually, such as setting a limiting screw or a buckle, etc. The length can also be adjusted by a motor drive to achieve the purpose of electric adjustment, such as a motor screw structure.

[0046] For the installation mode of the first clamping mechanism 210, the first mounting seat 211 is provided with a mounting hole which is vertically and perpendicularly arranged and has the same inner diameter as the outer diameter of the support column 120. During installation, the first mounting seat 211 is sleeved on the support column 120 and can slide along the axial direction of the support column 120. The first mounting seat 211 is further provided with a fixing bolt 215. By tightening the fixing bolt 215, the first mounting seat 211 can be fixed at a suitable position on the support column 120, thereby further improving the flexibility and adjustability of the first clamping mechanism 210.

[0047] Further, the first clamping block 213 is provided with a contact layer 216, which covers the surface of the first clamping block 213 and directly contacts the composite component 300. The contact layer 216 is used to improve the friction on the composite component 300, so that the clamping effect is more firm. Meanwhile, the contact layer 216 plays a buffering role in the impact experiment, slows down the wear of the parts of the adjustable clamp, prolongs the service life, and is a soft component. The material can be selected from high modulus rubbers such as hydrogenated nitrile rubber, fluororubber and polyurethane rubber.

[0048] The second clamping mechanism 220 of the embodiment is similar to the first clamping mechanism 210 and comprises a second mounting seat 221, a second ball head rod 222, a second clamping block 223 and two second lockable spherical hinge structures 224. One end of the second ball head rod 222 is rotationally connected with the second mounting seat 221 through the second lockable spherical hinge structure 224, and the other end of the second ball head rod 222 is rotationally connected with the second clamping block 223 through the second lockable spherical hinge structure 224, thereby forming the second clamping mechanism 220 with a large motion range and accurate adjustment.

[0049] Through the second lockable spherical hinge structure 224, the second ball head rod 222 can be spherically rotated relative to the second mounting seat 221 and fixed at a suitable position, and the second clamping block 223 can be spherically rotated relative to the second ball head rod 222 and fixed at a suitable position, so that after adjustment, the second clamping block 223 can be closely attached to the surface of the composite component 300. In other embodiments, the flexible movement of the second clamping block 223 in multiple degrees of freedom can be realized through other structures, such as a turntable, a rotating shaft, etc.

[0050] The second ball head rod 222 of the embodiment is a telescopic rod structure, which can be axially telescopic. In use, the length of the second ball head rod 222 is adjusted according to the size of the composite component 300 and the position of the second clamping block 223. The telescopic rod structure can be a pure mechanical structure, which is adjusted manually, such as being provided with a limiting screw or a buckle, etc. Alternatively, the length of the telescopic rod structure can be electrically adjusted by a motor, such as a motor lead screw structure, etc.

[0051] Further, the second clamping block 223 is provided with a contact layer 216, which covers the surface of the second clamping block 223. The contact layer 216 is used to improve the friction on the composite component 300, and plays a buffering role in the impact experiment, slows down the wear of the parts of the adjustable clamp, prolongs the service life, and is a soft component. The material can be selected from high modulus rubbers such as hydrogenated nitrile rubber, fluororubber and polyurethane rubber.

[0052] For the mounting mode of the second clamping mechanism 220, for example, Figure 2As shown, the first threaded holes 111 are evenly distributed in the middle of the base plate 110, the bottom of the second mounting seat 221 is provided with the first threaded joint 225 matched with the first threaded holes 111, the second clamping mechanism 220 is installed on the base plate 110 by screwing the threaded joint, and meanwhile, because the first threaded holes 111 are provided in plurality, the selected number and installation position of the second clamping mechanism 220 can be adjusted according to the clamping requirement, the applicability and flexibility of the adjustable clamp are improved, and the use range is expanded.

[0053] As shown, according to the shape and size of the composite material member 300 to be measured, a proper number of the struts 120 are selected and evenly spaced installed on the second threaded holes 112 of the base plate 110, a proper number of the second clamping mechanisms 220 are selected and evenly spaced installed on the first threaded holes 111 of the base plate 110, and a corresponding number of the first clamping mechanisms 210 are installed on the struts 120, the direction and length of the second ball head rod 222 and the position and angle of the second clamping block 223 are changed by adjusting the second ball head rod 222 and the second lockable spherical hinge structure 224, the second clamping block 223 is tightly fitted with the surface of the composite material member 300, the composite material member 300 is supported by the second clamping mechanism 220, and thus is stabilized in the suspended position, the first mounting seat 211 is adjusted to a proper height, the direction and length of the first ball head rod 212 and the position and angle of the first clamping block 213 are changed by adjusting the first ball head rod 212 and the first lockable spherical hinge structure 214, the first clamping block 213 and the second clamping block 223 are relatively fitted on the two sides of the composite material member 300, and the clamping of the composite material member 300 is completed. Figure 3 As shown, the first threaded holes 111 are evenly distributed in the middle of the base plate 110, the bottom of the second mounting seat 221 is provided with the first threaded joint 225 matched with the first threaded holes 111, the second clamping mechanism 220 is installed on the base plate 110 by screwing the threaded joint, and meanwhile, because the first threaded holes 111 are provided in plurality, the selected number and installation position of the second clamping mechanism 220 can be adjusted according to the clamping requirement, the applicability and flexibility of the adjustable clamp are improved, and the use range is expanded. Figure 4 As shown, the first threaded holes 111 are evenly distributed in the middle of the base plate 110, the bottom of the second mounting seat 221 is provided with the first threaded joint 225 matched with the first threaded holes 111, the second clamping mechanism 220 is installed on the base plate 110 by screwing the threaded joint, and meanwhile, because the first threaded holes 111 are provided in plurality, the selected number and installation position of the second clamping mechanism 220 can be adjusted according to the clamping requirement, the applicability and flexibility of the adjustable clamp are improved, and the use range is expanded.

[0054] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the knowledge range that the person skilled in the art has possesses.

Claims

1. An adjustable clamp for clamping a composite material component, characterised in that, Comprise: Support assembly, the support assembly includes the bottom plate and the support column, the support column is equipped with a plurality of, several the support column is vertically distributed on the top of the bottom plate; Clamping assembly, including a plurality of first clamping mechanisms and a plurality of second clamping mechanisms, a plurality of the first clamping mechanism is respectively installed on a plurality of the support column, a plurality of the second clamping mechanism is distributed on the top surface of the bottom plate, the first clamping mechanism includes the first mounting seat, the first ball head rod, the first clamping block and the first lockable ball hinge structure, the both ends of the first ball head rod are connected with the first mounting seat, the first clamping block through the first lockable ball hinge structure, the first mounting seat is connected with the support column, the second clamping mechanism includes the second mounting seat, the second ball head rod, the second clamping block and the second lockable ball hinge structure, the both ends of the second ball head rod are connected with the second mounting seat, the second clamping block through the second lockable ball hinge structure, the second mounting seat is connected with the bottom plate.

2. The adjustable clamp according to claim 1, wherein: The first ball head rod and the second ball head rod are respectively telescopic rod structures.

3. The adjustable clamp according to claim 1, wherein: The first mounting seat is movably arranged along the support column.

4. The adjustable clamp according to claim 3, wherein: The first mounting seat is provided with a mounting hole penetrating through the first mounting seat, the mounting hole is slidably connected with the support column, and the first mounting seat is provided with a bolt for locking.

5. The adjustable clamp according to claim 1, wherein: The second mounting seat is movably arranged on the bottom plate.

6. The adjustable clamp according to claim 5, wherein: The bottom plate is provided with a plurality of first threaded holes uniformly distributed thereon, and the second mounting seat is provided with a first threaded joint threadedly connected with the first threaded hole.

7. The adjustable clamp according to claim 1, wherein: The bottom plate has opposite first and second side edges, the first and second side edges are spaced apart along the length direction of the bottom plate, a plurality of the support columns are uniformly distributed on the first and second side edges, and a plurality of the second clamping mechanisms are arranged between the first and second side edges.

8. The adjustable clamp according to claim 7, wherein: The number of the first clamping mechanisms and the second clamping mechanisms correspond to each other, and the first clamping block and the second clamping block are oppositely arranged on both sides of the composite material member.

9. The adjustable clamp according to claim 1, wherein: The bottom plate is uniformly provided with a plurality of second threaded holes, and the support column is provided with a second threaded joint connected with the second threaded hole.

10. The adjustable clamp according to any one of claims 1 to 9, wherein: The first clamping block and the second clamping block are both provided with a contact layer, and the contact layer is a soft member.

Images