Clamp

Abstract

The utility model belongs to the technical field of composite material clamping, and discloses a clamp. The clamp comprises a base and a clamping structure. Wherein an avoiding structure is designed on a first supporting surface of the base; the clamping structure comprises a first clamping piece, a second clamping piece and a locking piece, the first clamping piece is arranged on the first supporting face, the second clamping piece is arranged at the top end of the first clamping piece, a clamping groove is formed between the first clamping piece and the second clamping piece, the first end of the locking piece is located at the bottom end of the first clamping piece, and the second end of the locking piece is located at the bottom end of the second clamping piece. The avoiding structure can contain and fix the first end, the second end of the locking piece can penetrate to the top end of the second clamping piece, and the clamping groove can clamp the workpiece by screwing the fastening piece. According to the clamp, the avoiding structure is arranged and used for fixing the first end of the locking piece, so that the locking piece cannot rotate along with the fastening piece when the fastening piece is screwed, the clamping effect is guaranteed, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material clamping, in particular to a clamp. Background Art

[0002] In the field of aerospace, composite materials have broad application prospects in the latest military or commercial aircraft, which can greatly reduce the weight of the structure and improve the efficiency of the structure. In the current compression test process, the compression fixture used mainly relies on four hexagonal bolts to adjust the distance between the support plate and the cover plate to achieve the purpose of fixing the test specimen. However, for this experiment, the compression fixture in the prior art cannot fix the bolt nut end while tightening the nut, resulting in a waste of time when the nut needs to be fixed one by one during the test. In addition, there is a gap between the bolt hole and the bolt, and when a single nut is fixed and tightened, it will interfere with the position of other bolts, resulting in uneven stress concentration on the specimen, which in turn causes damage to the compression fixture bolts, causing the bolt thread to slip and get stuck, etc.

[0003] Therefore, there is an urgent need for a clamp that can solve the problem of not being able to fix the bolt nut while tightening the nut, thereby improving the clamping efficiency and avoiding bolt damage and jamming. Utility Model Content

[0004] The utility model aims to provide a clamp which can solve the problem that the bolt nut cannot be fixed while the nut is tightened and clamped, thereby improving the clamping efficiency and avoiding the situation that the bolt is damaged and stuck.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A clamp, comprising:

[0007] A base, a first supporting surface of which is provided with an avoidance structure;

[0008] The clamping structure includes a first clamping member, a second clamping member, a locking member and a fastener, wherein the first clamping member is arranged on the first supporting surface, the second clamping member is arranged at the top end of the first clamping member, a clamping groove is arranged between the first clamping member and the second clamping member, the first end of the locking member is located at the bottom end of the first clamping member, and the avoidance structure can accommodate and fix the first end, the second end of the locking member can pass through to the top end of the second clamping member, and the fastener is arranged at the second end, and screwing the fastener can enable the clamping groove to clamp the workpiece.

[0009] Preferably, the avoidance structure comprises a limiting groove, and the limiting groove is used to accommodate the clamping structure.

[0010] Preferably, the avoidance structure further comprises a limiting hole, wherein the limiting hole is arranged in the limiting groove, and the limiting hole can accommodate and fix the first end.

[0011] Preferably, the first end is provided with a snap-in hole, and the limiting hole is further provided with a snap-in protrusion, and when the first end is located in the limiting hole, the snap-in protrusion can be snap-fitted into the snap-in hole accordingly.

[0012] Preferably, the base further has a second supporting surface, the second supporting surface is arranged opposite to the first supporting surface, and the second supporting surface is a plane.

[0013] Preferably, the limiting groove and the limiting hole do not penetrate the second supporting surface.

[0014] Preferably, a plurality of locking members are arranged along the circumference of the clamping structure.

[0015] Preferably, it is characterized in that the first clamping member is provided with a first clamping half groove, the second clamping member is provided with a second clamping half groove, and the first clamping half groove can be opposite to the second clamping half groove to form the clamping groove.

[0016] Preferably, a plurality of clamping grooves are provided.

[0017] Preferably, the clamping structure further comprises a support seat, the support seat is detachably connected to the bottom end of the first clamping member, and the locking member can pass through from the bottom end of the support seat to the top end of the second clamping member.

[0018] Beneficial effects of the utility model:

[0019] The clamp includes a base and a clamping structure. The first support surface of the base is designed with an avoidance structure; the clamping structure includes a first clamping member, a second clamping member and a locking member, the first clamping member is arranged on the first support surface, the second clamping member is arranged at the top of the first clamping member, a clamping groove is arranged between the first clamping member and the second clamping member, the first end of the locking member is located at the bottom of the first clamping member, and the avoidance structure can accommodate and fix the first end, the second end of the locking member can penetrate to the top of the second clamping member, and screwing the fastener can make the clamping groove clamp the workpiece. This clamp accommodates and fixes the first end of the locking member by setting the avoidance structure, thereby ensuring that when the fastener is screwed, the locking member will not rotate with the fastener, thereby ensuring the clamping effect and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an axonometric view of the clamp provided by the utility model;

[0021] Figure 2It is a structural schematic diagram of the clamp provided by the utility model;

[0022] Figure 3 This is a bottom view of the clamping structure provided by the utility model;

[0023] Figure 4 It is a structural schematic diagram of a base provided by the utility model.

[0024] In the figure:

[0025] 10. Base; 11. First supporting surface; 12. Avoidance structure; 121. Limiting groove; 122. Limiting hole; 123. Clamping protrusion; 13. Second supporting surface;

[0026] 20. Clamping structure; 21. First clamping member; 22. Second clamping member; 23. Locking member; 231. First end; 232. Second end; 233. Connecting hole; 24. Clamping groove; 25. Fastener; 26. Support seat. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] In order to improve the clamping efficiency, this embodiment provides a clamp. Figure 1 and Figure 2 As shown, the clamp includes a base 10 and a clamping structure 20, and the clamping structure 20 is arranged on the base 10. Specifically, the first support surface 11 of the base 10 is designed with an avoidance structure 12; the clamping structure 20 includes a first clamping member 21, a second clamping member 22, a locking member 23 and a fastener 25, the first clamping member 21 is arranged on the first support surface 11, the second clamping member 22 is arranged at the top of the first clamping member 21, a clamping groove 24 is arranged between the first clamping member 21 and the second clamping member 22, the first end 231 of the locking member 23 is located at the bottom end of the first clamping member 21, and the avoidance structure 12 can accommodate and fix the first end 231, the second end 232 of the locking member 23 can penetrate to the top of the second clamping member 22, and the fastener 25 is arranged at the second end 232, and screwing the fastener 25 can make the clamping groove 24 clamp the workpiece.

[0032] By setting the avoidance structure 12, the first end 231 of the locking member 23 is accommodated and fixed, so that when the fastener 25 is screwed, the locking member 23 will not rotate, thereby improving the clamping efficiency. It is worth noting that in this embodiment, the locking member 23 is a bolt, and the fastener 25 is a nut. The bolt passes through the bottom end of the first clamping member 21 to the top end of the second clamping member 22, and the nut is threadedly connected with the nut at the top end of the second clamping member 22. By screwing the nut, the first clamping member 21 and the second clamping member 22 can clamp the workpiece, and the operation is simple and convenient. In addition, the bolt and the nut have a simple structure and low price, which can reduce the overall manufacturing cost; at the same time, since the two are detachably connected, it is convenient to repair and replace subsequent parts. In addition, it is worth noting that all parts of the clamp in this embodiment are made of materials with high temperature resistance, high strength, high wear resistance and good self-stability, such as high-temperature alloys.

[0033] like Figure 1 and Figure 4 As shown, the avoidance structure 12 includes a limiting groove 121, and the limiting groove 121 is used to accommodate the clamping structure 20. By providing the limiting groove 121, when clamping the workpiece, the entire clamping structure 20 can be directly placed in the limiting groove 121, thereby ensuring that the clamping structure 20 as a whole will not shake during the process of screwing the fastener 25, thereby achieving a good clamping effect.

[0034] like Figure 1 and Figure 4 As shown, the avoidance structure 12 also includes a limiting hole 122, which is arranged in the limiting groove 121, and the limiting hole 122 can accommodate and fix the first end 231. Since the locking member 23 is a bolt, and its first end 231 is a bolt nut, by arranging the limiting hole 122 in the limiting groove 121, when the clamping structure 20 is placed in the limiting groove 121, the first end 231 of the locking member 23 can be located in the limiting hole 122, and the first end 231 of the locking member 23 is fixed by the limiting hole 122; at the same time, since the first end 231 is placed in the limiting hole 122, it can be ensured that the part of the clamping structure 20 other than the first end 231 can be in contact with the bottom surface of the limiting groove 121, thereby ensuring the stability of the clamping process.

[0035] It should be noted here that since the process of clamping the workpiece should always be stable, Figure 1 and Figure 4 As shown, the base 10 also has a second support surface 13, which is arranged opposite to the first support surface 11, and the second support surface 13 is a plane. When in use, the base 10 is placed on a horizontal plane through the second support surface 13, and the second support surface 13 and the limiting groove 121 of the first support surface 11 cooperate with each other, and the two together ensure the stability of the process of clamping the workpiece.

[0036] To ensure a good fixing effect on the locking member 23, Figure 1 , Figure 3 and Figure 4 As shown, the first end 231 of the locking member 23 is provided with a snap-in hole 233, and the limiting hole 122 is also provided with a snap-in protrusion 123. When the first end 231 is located in the limiting hole 122, the snap-in protrusion 123 can be snap-into the snap-in hole 233. It should be noted that the locking member 23 in this embodiment is a hexagon socket bolt, that is, the outer periphery of the bolt nut is circular, and the interior of the nut is provided with a hexagonal snap-in hole 233, and the corresponding snap-in protrusion 123 is also hexagonal. When the first end 231 is placed in the limiting hole 122, the hexagonal snap-in hole 233 can be snap-into the hexagonal snap-in protrusion 123, thereby achieving the fixing of the first end 231. The structure is simple and the fixing effect is good, so that when the fastener 25 is screwed, the locking member 23 will not rotate. In addition, the hexagon socket bolt also has the characteristics of a large force bearing area and can withstand a higher load.

[0037] It is further explained that in other embodiments, the locking member 23 may also be a structure of an inner square bolt, an inner cross bolt, etc., and a corresponding square or cross-shaped clamping protrusion 123 is provided in the limiting hole 122, which can also achieve the corresponding accommodation or fixing effect. As long as the structure of the clamping protrusion 123 of the corresponding shape is provided at the first end 231 of the locking member 23 in the limiting hole 122, it is within the public protection scope of this embodiment.

[0038] The horizontal plane will not affect the clamping structure 20, such as Figure 1 and Figure 4 As shown, the limiting groove 121 and the limiting hole 122 do not penetrate the second supporting surface 13. This structure can ensure that the clamping structure 20 and the first end 231 of the locking member 23 will not contact the horizontal surface, thereby ensuring a good clamping effect.

[0039] To ensure that the clamping structure 20 has sufficient clamping force, Figure 1 and Figure 3 As shown, a plurality of locking members 23 are arranged along the circumference of the clamping structure 20. It is worth noting that, in this embodiment, the locking members 23 are arranged at four vertex positions of the first clamping member 21 and the second clamping member 22, so as to ensure that in the process of tightening the four locking members 23, there will be no relative displacement between the first clamping member 21 and the second clamping member 22 due to the gap between them, thereby ensuring a good fastening and clamping effect.

[0040] In addition, in the prior art, it is necessary to screw the fasteners 25 corresponding to the four locking members 23 one by one to complete the clamping. However, in the process, since the first clamping member 21 and the second clamping member 22 are both designed with locking holes, the locking member 23 needs to pass through the locking hole and penetrate to the top of the second clamping member 22. However, there is a small gap between the locking member 23 and the locking hole. Therefore, when the fasteners 25 are tightened one by one, the clamping force on the workpiece will be uneven, which will cause the thread of the locking member 23 to slip or get stuck. In response to this problem, the current solution is to first tighten one locking member 23 (such as Figure 1 A certain pre-tightening force is initially applied to the locking member 23 at position A in the middle, but it is not locked, and then the locking member 23 diagonally opposite to the locking member 23 (i.e. Figure 1 The same pre-tightening force is applied to the locking member 23 at position B in the middle, and it is not locked. Then, in this order, the other two locking members 23 (i.e. Figure 1The same pre-tightening force is applied to the locking members 23 at positions C and D, but it is not necessary to completely tighten them; after completing the above steps, repeat the same sequence 1-2 times, and then tighten all the locking members 23. However, in this process, each time a workpiece is clamped, it is necessary to use the hexagonal wrench to fix it back and forth, which consumes a lot of manpower and time. In addition, the force used by each operator for locking is different, which will also cause uneven clamping force on the workpiece.

[0041] The clamp in this embodiment can solve the above problem well. When clamping is required, the fastener 25 needs to be screwed once to separate the first clamping member 21 and the second clamping member 22, clamp the workpiece between the two, and place the clamping mechanism in the limiting groove 121 so that the first end 231 of the locking member 23 is located in the limiting hole 122. At this time, the limiting hole 122 can fix the locking member 23. At this time, only one fastener 25 ( Figure 1 The fastener 25 at position A in the middle is tightened with a knob wrench to generate a certain pre-tightening force, and then the fastener 25 (i.e., the fastener 25 at an "oblique angle" to the previous fastener 25) is tightened with a knob wrench. Figure 1 The fastener 25 at position B in the middle also generates a certain pre-tightening force, but it is not completely locked, and so on, the remaining fasteners 25 (i.e. Figure 1 After the above steps are completed, repeat the same operation 1-2 times and then tighten all the fasteners 25. In this process, it is unnecessary to tighten the bolts multiple times with a hexagonal wrench, which greatly shortens the operation time and improves the clamping efficiency. In addition, by tightening the bolts one by one, multiple times, and diagonally ( Figure 1 The locking method of the clamp (in the order of ABCD in the figure) can also prevent stress concentration, damage or jamming of parts, and improve the clamping effect and the service life of the clamp.

[0042] like Figure 1 and Figure 2 As shown, the first clamping member 21 is provided with a first clamping half groove, and the second clamping member 22 is provided with a second clamping half groove, and the first clamping half groove can be directly opposite to the second clamping half groove to form a clamping groove 24. This structure is not only convenient for processing the clamping groove 24, but also convenient for taking and placing the workpiece. In addition, the shape of the clamping groove 24 can be processed according to the shape of the workpiece to be clamped, which is highly practical. Figure 1 and Figure 2 As shown, a plurality of clamping grooves 24 are designed, thereby further improving the clamping efficiency of the clamp.

[0043] like Figure 1-Figure 3As shown, the clamping structure 20 further includes a support seat 26, which is detachably connected to the bottom end of the first clamping member 21, and the locking member 23 can pass through the bottom end of the support seat 26 to the top end of the second clamping member 22. By providing the support seat 26, the clamping structure 20 can be conveniently placed in the limiting groove 121, and after the clamping is completed, it is also convenient to take out the clamping structure 20. In addition, since the support seat 26 is detachably connected to the bottom end of the first clamping member 21, subsequent maintenance and replacement are convenient.

[0044] Finally, the use process of the clamp in this embodiment is described with reference to the accompanying drawings:

[0045] First, the clamping structure 20 is placed in the limiting groove 121, and the limiting hole 122 accommodates and fixes the first end 231 of the locking member 23;

[0046] Next, tighten the plurality of fasteners 25 and place the workpiece in the clamping groove 24;

[0047] Next, select a fastener 25 ( Figure 1 The fastener 25 at position A in the middle is screwed a certain number of times in the direction of tightening and clamping, so that the fastener 25 generates a certain pre-tightening force, but is not completely locked; then the fastener 25 at a "diagonal angle" to the fastener 25 (i.e. Figure 1 The fastener 25 at position B in the middle is screwed the same number of times as A, and then the remaining two fasteners 25 (i.e. Figure 1 The fasteners 25) at positions C and D in the figure are tightened the same number of turns;

[0048] Next, repeat the above steps 1-2 times to completely tighten all fasteners 25;

[0049] Finally, after the clamping work is completed, follow the steps one by one, multiple times, diagonally ( Figure 1 The fastener 25 is loosened in the order of ABCD in the figure to remove the workpiece.

[0050] In summary, the use of the clamp provided in this embodiment can not only ensure that the locking member 23 does not rotate at any time while the fastener 25 is screwed, but also improve the clamping efficiency and avoid damage to the workpiece or the clamp.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A clamp, characterized in that: include: A base (10), wherein a first supporting surface (11) thereof is provided with an avoidance structure (12); The clamping structure (20) comprises a first clamping member (21), a second clamping member (22), a locking member (23) and a fastener (25), wherein the first clamping member (21) is arranged on the first supporting surface (11), the second clamping member (22) is arranged at the top end of the first clamping member (21), a clamping groove (24) is arranged between the first clamping member (21) and the second clamping member (22), the first end (231) of the locking member (23) is located at the bottom end of the first clamping member (21), and the avoidance structure (12) is capable of accommodating and fixing the first end (231), the second end (232) of the locking member (23) is capable of passing through to the top end of the second clamping member (22), the fastener (25) is arranged at the second end (232), and screwing the fastener (25) can enable the clamping groove (24) to clamp a workpiece.

2. The clamp according to claim 1, characterized in that: The avoidance structure (12) comprises a limiting groove (121), and the limiting groove (121) is used to accommodate the clamping structure (20).

3. The clamp according to claim 2, characterized in that: The avoidance structure (12) further comprises a limiting hole (122), wherein the limiting hole (122) is arranged in the limiting groove (121), and the limiting hole (122) is capable of accommodating and fixing the first end (231).

4. The clamp according to claim 3, characterized in that: The first end (231) is provided with a snap-fitting hole (233), and the limiting hole (122) is also provided with a snap-fitting protrusion (123). When the first end (231) is located in the limiting hole (122), the snap-fitting protrusion (123) can be snap-fitted into the snap-fitting hole (233) accordingly.

5. The clamp according to claim 3, characterized in that: The base (10) further comprises a second supporting surface (13), the second supporting surface (13) being arranged opposite to the first supporting surface (11), and the second supporting surface (13) being a plane.

6. The clamp according to claim 5, characterized in that: The limiting groove (121) and the limiting hole (122) do not penetrate the second supporting surface (13).

7. The clamp according to any one of claims 1 to 6, characterized in that: A plurality of locking members (23) are arranged along the circumference of the clamping structure (20).

8. The clamp according to any one of claims 1 to 6, characterized in that: The first clamping member (21) is provided with a first clamping half groove, and the second clamping member (22) is provided with a second clamping half groove, and the first clamping half groove can be directly opposite to the second clamping half groove to form the clamping groove (24).

9. The clamp according to any one of claims 1 to 6, characterized in that: A plurality of the clamping grooves (24) are provided.

10. The clamp according to any one of claims 1 to 6, characterized in that: The clamping structure (20) further comprises a support seat (26), wherein the support seat (26) is detachably connected to the bottom end of the first clamping member (21), and the locking member (23) is capable of passing through from the bottom end of the support seat (26) to the top end of the second clamping member (22).

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