Fastener locking device and detection clamp

Abstract

The utility model discloses a fastener anti-loosing device and a detection clamp, the fastener anti-loosing device comprises a mating part and a fixing part, the head of the fastener is provided with a sinking groove, the fastener is locked on a first surface of a locked structure, and the mating part is used for being matched and inserted with the sinking groove; the fixing piece is connected to the matching piece, the fixing piece has an extending direction, an included angle is formed between the extending direction and the axis of the matching piece, and the end, away from the matching piece, of the fixing piece is used for being connected with the locked structure. According to the fastener anti-loosening device, anti-loosening can be achieved, and meanwhile cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hardware technical field, especially a fastener anti-loose device and detection clamp. BACKGROUND

[0002] The inner hexagonal bolt is directly connected with the counterbore of the workpiece, so that two workpieces can be fastened and connected without nut cooperation. The ordinary bolt anti-loose is generally increased elastic gasket, however, when the inner hexagonal bolt is fastened in the counterbore, the bolt and the locking position form a plane, and it is inconvenient to increase the anti-loose gasket structure.

[0003] In the related art, the bolt cap and the counterbore are additionally holed, and an additional locking piece is increased to lock and prevent loosening. This method not only needs additional structural parts, but also needs to reprocess the standard bolt, increasing the cost. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a fastener anti-loose device, which aims to solve the technical problem of high cost due to reprocessing of the bolt in the existing anti-loose method.

[0005] To achieve the above-mentioned purpose, the fastener anti-loose device provided by the utility model comprises a matching piece and a fixing piece, the head of the fastener is provided with a sink, the fastener is locked to the first surface of the locked structure, and the matching piece is used for being matched and inserted with the sink.

[0006] The fixing piece is connected to the matching piece, the fixing piece has an extension direction, the extension direction is arranged at an angle with the axis of the matching piece, and one end of the fixing piece away from the matching piece is used for being connected with the locked structure.

[0007] The fastener anti-loose device of the utility model is inserted and fixed through the matching piece and the original sink structure of the fastener, the fixing piece extends in the direction away from the matching piece, thereby being connected with the surface of the structure locked with the fastener, so that the rotation of the matching piece is limited through the fixation of the fixing piece, and then through the connection of the matching piece and the fastener, the rotation loosening of the fastener in the circumferential direction can be prevented, thereby realizing the anti-loose effect of the fastener. The fastener anti-loose device of the structure does not need to additionally hole or groove the original standard fastener, can assemble and prevent loosening after the fastener is implemented to fasten the structure, effectively saves the cost, and improves the efficiency. At the same time, the fastener anti-loose device can be standardized designed and mass-produced, improves the adaptability, and further reduces the cost.

[0008] In an embodiment of the utility model, the outer peripheral shape of the cross section of the matching piece is hexagonal.

[0009] The matching piece is adapted to the fastener of the inner hexagonal bolt, and the insertion and fixation effect is good.

[0010] In an embodiment of the utility model, the fitting part is provided with a through hole, and the through hole penetrates two end faces of the fitting part in the axial direction.

[0011] The through hole can be used for exhaust, so that the fitting part is more easily inserted with the sink of the fastener, while saving materials and reducing costs.

[0012] In an embodiment of the utility model, the opening shape of the through hole is hexagonal.

[0013] The through hole with the shape can facilitate disassembly and assembly with existing tools.

[0014] In an embodiment of the utility model, the fitting part is in interference fit with the sink.

[0015] And / or, the size of the fitting part in the axial direction is the same as the depth of the sink.

[0016] The size of the fitting part is in interference fit with the sink size of the standard part, so that the anti-loosening effect is improved.

[0017] The height of the fitting part is adapted to the depth of the sink, so that the insertion stability is improved, and the anti-loosening is further improved.

[0018] In an embodiment of the utility model, the end of the fixing part away from the fitting part is foldably provided to form an abutting part, and the abutting part is arranged to abut the surface adjacent to the first surface.

[0019] The fixing part is folded according to the size of the locked structure after the fitting part is inserted into the sink, so that the abutting part formed by the end of the fixing part abuts the surface adjacent to the locking surface of the locked structure. The connection mode is simple and convenient, and the rotation of the fitting part and the fastener can be limited.

[0020] In an embodiment of the utility model, the size of the abutting part in the extension direction of the fixing part is greater than or equal to 5mm and less than or equal to 10mm.

[0021] The abutting part with the size range can improve the abutting stability and improve the anti-loosening effect.

[0022] In an embodiment of the utility model, the abutting part is provided with a threaded hole, and the threaded hole is used for threaded connection with the surface adjacent to the first surface.

[0023] And / or, the surface of the abutting part is provided with an adhesive, and the adhesive is used for adhesion with the surface adjacent to the first surface.

[0024] The fitting part in the example further improves the connection stability through thread connection and / or bonding on the basis of fitting, and further improves the anti-loosening effect.

[0025] In an embodiment of the present application, the free end of the fitting part is bendably arranged to be fitted to the surface opposite to the first surface.

[0026] The fitting part of the structure can be bent again on the basis of the structure of the bent side of the fixing part, thereby increasing the fitting area of the surface of the locked structure, and further improving the connection stability.

[0027] In an embodiment of the present application, the fixing part is provided with at least two, and the at least two fixing parts are connected to the fitting part and arranged at intervals in the circumferential direction of the fitting part.

[0028] Through the arrangement of the at least two fixing parts, the connection stability with the locked structure is improved, thereby improving the anti-loosening effect of the fastener anti-loosening device.

[0029] In an embodiment of the present application, the fastener anti-loosening device further comprises a covering part, and the covering part is at least partially annularly arranged on the circumferential side of the fitting part.

[0030] One end of the fixing part in the extension direction is connected to the circumferential side of the covering part, and the covering part is used to cover the head end surface of the fastener.

[0031] The arrangement of the covering part can increase the contact area with the fastener, improve the protection of the fastener, and facilitate the insertion of the fitting part.

[0032] In an embodiment of the present application, the outer peripheral shape of the cross section of the covering part is circular.

[0033] The covering part of this shape is matched with the circular head structure of the fastener.

[0034] In an embodiment of the present application, the outer diameter of the covering part is the same as the outer diameter of the head of the fastener.

[0035] The head end surface of the fastener can be fully covered, and the protection of the fastener is improved.

[0036] In an embodiment of the present application, the covering part is located at one end surface of the fitting part, and the connection between the fitting part and the covering part is circularly arc transitionally arranged.

[0037] And / or, the fitting part, the covering part and the fixing part are integrally formed.

[0038] The circular arc transitionally arranged at the connection between the two can reduce stress concentration and improve structural strength.

[0039] The three components can be molded into a single unit to further enhance structural stability.

[0040] In one embodiment of this utility model, the fixing member is plate-shaped, and the thickness of the fixing member is greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

[0041] Fasteners within this thickness range offer high structural strength and are easy to bend and connect.

[0042] This utility model also proposes a testing fixture, which includes two clamping plates spaced apart, fasteners connecting the two clamping plates, and a fastener anti-loosening device as described above. The mating part is inserted into the recess, and the fixing part is connected to the clamping plate.

[0043] Subject protection for the testing fixture. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the fastener anti-loosening device of this utility model before assembly;

[0046] Figure 2 for Figure 1 The front view of the fastener anti-loosening device shown;

[0047] Figure 3 for Figure 1 Top view of the fastener anti-loosening device shown;

[0048] Figure 4 This is a schematic diagram of the structure of the fastener anti-loosening device of this utility model after bending;

[0049] Figure 5 for Figure 4 The front view of the fastener anti-loosening device shown;

[0050] Figure 6 This is a structural diagram illustrating the assembly process of the fastener anti-loosening device of this utility model;

[0051] Figure 7 for Figure 6 The front view shown;

[0052] Figure 8 This is a schematic diagram of the assembled fastener anti-loosening device of this utility model;

[0053] Figure 9 To Figure 8 the top view.

[0054] BRIEF DESCRIPTION OF DRAWINGS

[0055] 100, fastener anti-loosening device; 10, mating piece; 11, through hole; 20, fixed piece; 21, fitting part; 30, covering piece; 500, fastener; 501, sink; 600, locked structure; 601, first surface;

[0056] 700, battery device.

[0057] The realization, functional features and advantages of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0059] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0060] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0061] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0062] As a kind of fastener, bolt has the advantages of simple operation and easy disassembly, and has been widely used in various industries, such as assembly and repair of mechanical equipment, fixed bearing and machine parts, sealing equipment. Bolt is a kind of mechanical parts, generally composed of head and screw rod two parts, used for fastening two parts with through hole or threaded hole, this connection form is called bolt connection, belongs to detachable connection.

[0063] The internal hexagonal head bolt is also called socket head screw, which is a fastener with a hexagonal hole in the head. It can fasten and connect two workpieces without nut. The internal hexagonal bolt is most commonly used in cylindrical head screw, that is, the outer edge of the head is round. The design of counterbore allows the head to be exposed on the surface of the fixed object, and can also be rotated and locked, so it is mostly used in places where traditional wrenches are not convenient to use.

[0064] After two workpieces are connected by threaded connection, in the subsequent use process, the bolt will be loose due to external force such as vibration or impact, which will affect the connection stability between workpieces. Therefore, the anti-loose of ordinary bolt is generally to increase elastic gasket, and the elastic resistance of elastic gasket is used to reduce the rotation of bolt. However, when the internal hexagonal bolt is fastened in the counterbore, the end face will form a plane with the locking position, and it is not convenient to increase the anti-loose gasket and other structures.

[0065] In the related art, for the anti-loose of internal hexagonal bolt, some schemes are to additionally drill holes on the head and counterbore, and to increase additional locking members for locking and anti-loose. This way not only needs additional structural members, but also needs to reprocess the standard bolt, increasing the cost.

[0066] Based on the above background, the present application provides a fastener anti-loose device, which is inserted into the sink groove of the fastener by cooperating with the sink groove, and the fixing member connected with the cooperating member is fixed on other position of the locked structure, so that the loosening of the fastener due to rotation in the subsequent use process can be effectively prevented.

[0067] The fastener anti-loosening device can be used in any structure fixed by the fastener with the sink groove, such as a detection fixture for testing battery expansion, or other assembled housings and boxes, without limitation.

[0068] The fastener anti-loosening device is described below with specific embodiments:

[0069] Please refer to Figures 1 to 9 In an embodiment of the utility model, the fastener anti-loosening device 100 is used for limiting and preventing loosening of the fastener 500. The fastener 500 is locked to the first surface of the locked structure 600, and the head of the fastener 500 is provided with a sink groove 501. The fastener anti-loosening device 100 comprises a fitting piece 10 and a fixing piece 20. The fitting piece 10 is used for being inserted into the sink groove 501 in cooperation.

[0070] The fixing piece 20 is connected to the fitting piece 10. The fixing piece 20 has an extension direction, which is arranged at an angle with the axis of the fitting piece 10. The end of the fixing piece 20 away from the fitting piece 10 is used for being connected to the locked structure 600.

[0071] In this embodiment, the fastener anti-loosening device 100 is used for limiting and preventing loosening of the fastener 500 with the sink groove 501 in the head. The fastener 500 is used for connecting the locked structure 600, which comprises at least two parts. One part is provided with a threaded hole, and the other part is provided with a counterbore. The threaded section of the fastener 500 is locked in the threaded hole through the counterbore, and the head is limited in the counterbore. In this way, the connection of the two parts is realized. The surface of the other part provided with the counterbore is the first surface. The specific shape of the two parts is not limited, for example, the parts can be plate-shaped, block-shaped, or cylindrical, etc.

[0072] The sink groove 501 of the fastener 500 is used for cooperating with the corresponding operating tool, so as to realize the rotation locking of the fastener 500 by the handheld operating tool. Therefore, the opening shape of the sink groove 501 can be hexagonal, or one-character-shaped or cross-shaped, etc. without limitation, that is, the fastener 500 can be an internal hexagonal bolt, or a one-character-shaped bolt or a cross-shaped bolt, etc. The fitting piece 10 is inserted into the sink groove 501 in cooperation, so that the outer peripheral shape of the fitting piece 10 matches the opening shape of the sink groove 501, thereby realizing the stable insertion and cooperation relationship. The fitting piece 10 can be block-shaped, strip-shaped or cylindrical, etc. without limitation, and has an axis parallel to the axis of the fastener 500.

[0073] The fixing member 20 is connected to the fitting member 10, which means that the fixing member 20 can be connected to the circumferential side of the fitting member 10 or the end face of the fitting member 10, which is not limited herein. The connection mode of the two can be welding, detachable connection or one-piece forming, etc. The fixing member 20 has an extension direction, that is, the fixing member 20 has at least an extension direction away from the center direction of the fitting member 10, and the extension direction is arranged at an angle with the axis of the fitting member 10, which means that the fixing member 20 is not extended along the axis direction of the fitting member 10, but is bent and extended towards the circumferential side of the fitting member 10. The angle between the extension direction and the axis of the fitting member 10 can be an acute angle, a right angle or an obtuse angle, which is not limited herein.

[0074] The end of the fixing member 20 away from the fitting member 10 means that the end of the fixing member 20 away from the fitting member 10 in the extension direction thereof is connected to the locked structure 600, which means that the end of the fixing member 20 is connected to a part of the locked structure 600, for example, can be connected to the first surface, or connected to a position adjacent to or opposite to the first surface, or connected to a part with a threaded hole, which is not limited herein.

[0075] The fastener anti-loosening device 100 of the utility model is inserted and fixed through the fitting member 10 and the original recess groove 501 structure of the fastener 500, the fixing member 20 extends in the direction away from the fitting member 10 and is connected to the surface of the structure locked to the fastener 500, so that the rotation of the fitting member 10 is limited by the fixing of the fixing member 20, and then through the insertion of the fitting member 10 and the fastener 500, the rotation loosening of the fastener 500 in the circumferential direction can be prevented, so that the anti-loosening effect of the fastener 500 is realized. The fastener anti-loosening device 100 of the structure does not need to make additional holes or slots on the original standard fastener 500, effectively saves the processing cost, and can assemble the anti-loosening after the fastening connection of the fastener 500 is implemented, improves the assembly efficiency.

[0076] Since the fastener 500 is generally a standard part, the fitting member 10 matched with the recess groove 501 can also be processed into a standard part, so that batch processing is realized, the adaptability is improved, and the cost is further effectively saved.

[0077] Please continue to refer to Figure 1 and Figure 3 In an embodiment of the utility model, the outer peripheral shape of the cross section of the fitting member 10 is a hexagon.

[0078] The outer peripheral shape of the cross section of the fitting piece 10 in the example refers to the shape enclosed by the outer periphery of the cross section of the fitting piece 10 after the fitting piece 10 is cut along a direction perpendicular to the axis of the fitting piece 10. The outer peripheral shape of the cross section of the fitting piece 10 is hexagonal, so the corresponding fastener 500 is an inner hexagonal bolt, and the opening shape of the sink 501 is hexagonal. The bolt is convenient to disassemble and improves the connection efficiency, and the fitting piece 10 and the sink 501 of the bolt are good in plug-in fixing effect.

[0079] Please refer to Figure 1 In an embodiment of the present application, the fitting piece 10 is provided with a through hole 11, and the through hole 11 penetrates the two end faces of the fitting piece 10 in the axial direction.

[0080] In the example, the through hole 11 penetrates the two end faces of the fitting piece 10 in the axial direction, that is, the through hole 11 penetrates the end face of the fitting piece 10 facing the bottom of the sink 501 and the end face away from the bottom of the sink 501. When the fitting piece 10 is inserted into the sink 501, the through hole 11 can be used to exhaust the air in the sink 501, so that the fitting piece 10 is more easily inserted into the sink 501 of the fastener 500. At the same time, the fitting piece 10 is provided with the through hole 11, which can save materials and reduce costs. The opening shape of the through hole 11 can be circular, square or polygonal, which is not limited here.

[0081] In one example, the axis of the through hole 11 is parallel to the axis of the fitting piece 10. In another example, the axis of the through hole 11 coincides with the axis of the fitting piece 10, so that the through hole 11 is located at the center of the cross section of the fitting piece 10, so that the structure of the fitting piece 10 is stable, the structural strength of each position is the same, and stress concentration does not occur, thereby improving the stability of the connection with the sink 501.

[0082] Please refer to Figure 1 In an embodiment of the present application, the opening shape of the through hole 11 is hexagonal.

[0083] In the example, the opening shape of the through hole 11 is hexagonal, and the through hole 11 of this shape is compatible with the existing disassembly tool, so that when the fastener anti-loose device 100 is disassembled, the tool can be inserted into the through hole 11, thereby improving the convenience of disassembly.

[0084] In an embodiment of the present application, the fitting piece 10 is in interference fit with the sink 501.

[0085] And / or, the size of the fitting piece 10 in the axial direction is the same as the depth of the sink 501.

[0086] In the embodiment, the interference fit between the fitting part 10 and the sink 501 means that the outer circumferential dimension of the fitting part 10 and the opening dimension of the sink 501 are in an interference fit relationship, that is, in terms of processing dimensions, the tolerance band of the opening dimension of the sink 501 is below the tolerance band of the outer circumferential dimension of the fitting part 10. The dimensions of the fitting part 10 and the sink 501 are in an interference fit, thereby improving the stability of the insertion of the two, and further reducing the movable space of the fastener 500, and further improving the anti-loose effect. In other examples, the fitting part 10 can be wrapped with a layered structure on the side, so that the fitting part 10 and the sink 501 are in an interference fit.

[0087] On the basis of defining or not defining the interference fit between the fitting part 10 and the sink 501, the height of the fitting part 10 and the depth of the sink 501 are set to be the same, that is, after the fitting part 10 is inserted into the sink 501, the end of the fitting part 10 is flush with the slot of the sink 501. In this way, the insertion area of the fitting part 10 and the sink 501 can be increased, the insertion stability can be improved, the anti-loose effect can be further improved, and at the same time, the fitting part 10 can be prevented from protruding from the surface of the locked structure 600, and interference can be reduced. In other examples, the height of the fitting part 10 can be set to be lower than the depth of the sink 501.

[0088] Please refer to Figure 4 and Figure 5 , and Figures 6 to 9 In an embodiment of the utility model, the end of the fixing part 20 away from the fitting part 10 can be bent to form a fitting part 21, and the fitting part 21 is arranged to be fitted to at least the surface adjacent to the first surface.

[0089] In the embodiment, the end of the fixing part 20 away from the fitting part 10 can be bent to form a fitting part 21, and the fitting part 21 is arranged to be fitted to at least the surface adjacent to the first surface.

[0090] The fixing piece 20 is bent according to the size of the locked structure 600 after the matching piece 10 is inserted into the sink 501, so that the end of the fixing piece 20 forms the abutting portion 21 which is adjacent to the surface of the locked structure 600. When the fastener 500 is loosened, the matching piece 10 tends to rotate, but the matching piece 10 is limited by the pressing force of the fixing piece 20 and the abutting portion 21, so that the matching piece 10 cannot rotate, thereby limiting the loosening of the fastener 500. The connection mode is simple and convenient, and the rotation of the matching piece 10 and the fastener 500 can be limited.

[0091] Optionally, the material of the fixing piece 20 is aluminum alloy, stainless steel or other metal sheet metal material, so that the fixing piece 20 can be directly bent and fixed by external force when it extends to the edge position of the first surface. This mode is simple and convenient, and can effectively improve the structural strength and stability. In other examples, the fixing piece 20 can be directly connected and fixed with the first surface.

[0092] In an embodiment of the present application, the size of the abutting portion 21 in the extension direction of the fixing piece 20 is greater than or equal to 5mm and less than or equal to 10mm.

[0093] In the embodiment, the size of the fixing piece 20 in the extension direction is affected by the size of the sink hole center to the edge position of the first surface, so the size is not limited. The fixing piece 20 is bent at the position where the two surfaces intersect to form the abutting portion 21. In the case where the size of the surface adjacent to the first surface is not limited, the size of the abutting portion 21 is greater than or equal to 5mm and less than or equal to 10mm, for example, 6mm, 7mm, 8mm or 9mm, etc. The abutting portion 21 with the size range can improve the abutting stability, improve the anti-loosening effect, and save materials.

[0094] In an embodiment of the present application, the abutting portion 21 is provided with a threaded hole, and the threaded hole is used for threaded connection with the surface adjacent to the first surface.

[0095] And / or, the surface of the abutting portion 21 is provided with an adhesive, and the adhesive is used for bonding with the surface adjacent to the first surface.

[0096] In the embodiment, in order to further improve the stability of the connection between the abutting portion 21 and the locked structure 600, in an example, the abutting portion 21 is provided with a threaded hole, and the abutting portion 21 is screwed with the locked structure 600, thereby further improving the anti-loosening effect.

[0097] On the basis of limiting or not limiting the threaded connection of the abutting portion 21, an adhesive is arranged between the abutting portion 21 and the surface adjacent to the first surface, so that the two are bonded, thereby further improving the connection stability,

[0098] The fitting part 21 in the example further improves the connection stability through screw connection and / or bonding on the basis of fitting, and further improves the anti-loose effect.

[0099] In an embodiment of the present application, the free end of the fitting part 21 is bendably arranged to be fitted to the surface opposite to the first surface.

[0100] In the embodiment, the fitting part 21 can be bent again on the basis of the structure of the fixing part 20 bent once, so as to increase the fitting area of the surface of the locked structure, further improve the connection stability, and the connection mode is simple and fast. Here, the bendability of the fitting part 21 is the same as the above bending principle. For example, the locked structure 600 is a cuboid plate, the first surface is one surface of the cuboid, the fitting part 21 is fitted to one side surface of the cuboid, and the free end of the fitting part 21 is fitted and pressed against another surface of the cuboid.

[0101] In an embodiment of the present application, the fixing part 20 is provided with at least two, and the at least two fixing parts 20 are connected to the fitting part 10 and arranged at intervals in the circumferential direction of the fitting part 10.

[0102] In the embodiment, the at least two fixing parts 20 refer to two, three or more fixing parts 20, which are connected to the circumferential side of the fitting part 10 and respectively used for fitting and fixing different surfaces adjacent to the first surface. For example, the locked structure 600 is a cuboid plate, the position of the counterbore is located at the position of one surface of the cuboid close to the top corner, and then two fixing parts 20 can be arranged, one of which extends and bends towards a short side, and the other of which extends and bends towards a long side, and then two fitting parts 21 are respectively fitted and pressed against two side surfaces. Through the arrangement of the at least two fixing parts 20, the connection stability with the locked structure 600 is improved, so as to improve the anti-loose effect of the fastener anti-loose device 100.

[0103] Please refer to Figure 1 , Figure 2 and Figure 4 In an embodiment of the present application, the fastener anti-loose device 100 further comprises a covering part 30, and the covering part 30 is at least partially arranged on the circumferential side of the fitting part 10.

[0104] One end of the fixing part 20 in the extension direction is connected to the circumferential side of the covering part 30, and the covering part 30 is used for covering the head end surface of the fastener 500.

[0105] In the embodiment, the cover 30 is at least partially annularly arranged on the circumferential side of the fitting member 10, which means that the cover 30 is partially annularly arranged on the circumferential side of the fitting member 10 and partially located at the end of the fitting member 10, for example, the cover 30 is plate-shaped and located at the end of the fitting member 10, or the cover 30 is annular and entirely annularly arranged on the circumferential side of the fitting member 10. The cover 30 can increase the contact area with the fastener 500, improve the protection of the fastener 500, and facilitate the insertion of the fitting member 10. Optionally, the thickness of the cover 30 is the same as the thickness of the fixing member 20, thereby facilitating the connection of the fixing member 20.

[0106] Please refer to Figure 4 In an embodiment of the utility model, the outer periphery shape of the cross section of the cover 30 is circular.

[0107] In the embodiment, the outer periphery shape of the cross section of the cover 30 means that the cover 30 is divided by a plane perpendicular to the axis of the fitting member 10 to obtain the shape formed by the outer periphery of the section. The corresponding fastener 500 is a hexagonal socket head cap screw, so the cover 30 with the shape is matched with the circular head structure of the fastener 500. In other examples, the outer periphery shape of the cross section of the cover 30 can also be polygonal.

[0108] In an embodiment of the utility model, the outer diameter of the cover 30 is the same as the outer diameter of the head of the fastener 500.

[0109] In the embodiment, the outer diameter of the cover 30 and the outer diameter of the head of the fastener 500 are set to be the same, which can comprehensively cover the head end surface of the fastener 500 and improve the protection of the fastener 500. At the same time, the fastener 500 is a standard part, and the size of the cover 30 can also be set to a standard size, thereby improving the application range. In other examples, the outer diameter of the cover 30 can also be smaller than the outer diameter of the head of the fastener 500.

[0110] Please refer to Figure 1 and Figure 4 In an embodiment of the utility model, the cover 30 is located at one end surface of the fitting member 10, and the connection between the fitting member 10 and the cover 30 is arc transitionally arranged.

[0111] And / or, the fitting member 10, the cover 30 and the fixing member 20 are integrally formed.

[0112] In the embodiment, the cover 30 is plate-shaped and located at the end surface of the fitting member 10. Based on the structure that the fitting member 10 is provided with the through hole 11, the through hole 11 penetrates the cover 30. The arc transitionally arranged connection between the fitting member 10 and the cover 30 can reduce stress concentration and improve structural strength.

[0113] On the basis of the arc transition provided at the connection of the fitting piece 10 and the cover piece 30, the fitting piece 10, the cover piece 30 and the fixing piece 20 are integrally formed, which can further improve the structural stability.

[0114] In an embodiment of the present application, the fixing piece 20 is plate-shaped, and the thickness of the fixing piece 20 is greater than or equal to 0.8 mm and less than or equal to 1.2 mm.

[0115] In the embodiment, the thickness of the fixing piece 20 is not too large due to the cost and connection convenience, of course, the thickness of the fixing piece 20 is not too small, and the thickness of the fixing piece 20 is greater than or equal to 0.8 mm and less than or equal to 1.2 mm, for example, 0.9 mm, 1 mm, 1.1 mm, etc., the fixing piece 20 with the thickness range has high structural strength and is convenient to bend and connect, thereby improving the structural stability and disassembly convenience.

[0116] Optionally, the fixing piece 20 is long strip-shaped, thereby being more convenient to bend. When the surface to be connected is a plane, the fixing piece 20 is a plane plate, and when the surface to be connected is an arc surface, the fixing piece 20 can also be an arc surface plate.

[0117] The battery device mentioned in the art can be divided into primary batteries and rechargeable batteries according to whether it can be charged. Currently, common types of rechargeable batteries include lead-acid batteries, nickel-hydrogen batteries and lithium-ion batteries. The battery device described in the embodiments of the present application refers to a rechargeable battery. Hereinafter, the embodiments disclosed in the present application will mainly be described by taking lithium-ion batteries as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery device mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to appropriate devices to supply power to the devices.

[0118] The battery device mentioned in the embodiments disclosed in the present application refers to a single physical module including one or more battery monomers to provide a predetermined voltage and capacity, which can be a battery module or a battery pack. The battery monomer is a basic unit in the battery device, and can be used to make a battery module or a battery pack. The battery module is formed by connecting a certain number of battery monomers in series and / or parallel and placing them in a frame in order to protect the battery monomers from external impact, heat, vibration, etc. The battery pack generally includes a battery module, a battery management system and a box containing the battery module and the battery management system, and the box protects the battery monomers from external objects.

[0119] The electrochemical reaction inside the battery cell can cause the battery device to expand, generating an expansion force, and the main position of the expansion force is the large face of the battery cell, which refers to the surface with the largest area of the battery cell. Therefore, it is necessary to measure the expansion force of the battery device during charging and discharging to detect the product quality and realize the optimized design of the battery device. At present, a detection clamp is usually used to measure the expansion force of the battery cell, that is, the battery device is placed between two clamping plates, and the two clamping plates are locked by a locking member to fix the battery device, and a pressure sensor is placed between the battery device and the clamping plate to measure the expansion force of the battery device.

[0120] However, during the detection process, the stress on the clamping plate can cause the locking member to loosen, thereby causing the detection result to be not accurate enough and not being able to truly reflect the expansion force of the battery device. Therefore, it is necessary to design the locking member of the detection clamp to prevent loosening.

[0121] Therefore, in combination with Figures 6 to 9 The utility model also provides a detection clamp, the detection clamp includes two clamping plates which are arranged at intervals, a fastener which connects the two clamping plates, and the fastener anti-loosening device 100 described in any of the above, the cooperating piece 10 is inserted in the sink 501, and the fixing piece 20 is connected to the clamping plate. The fastener anti-loosening device of the detection clamp adopts all the technical schemes of the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical schemes of the above-mentioned embodiments, which will not be described one by one here.

[0122] The detection clamp can be used for detecting the expansion force of the battery device 700. Specifically, a space for installing the battery device 700 is formed between the two clamping plates, and the fastener is connected to clamp the two clamping plates to the battery device 700. By arranging a sensor between the battery device 700 and the clamping plate, the expansion force of the battery device 700 can be detected.

[0123] Among them, the connecting column between the clamping plate and the clamping plate is the locked structure 600 described above, the surface of one clamping plate away from the other clamping plate is the first surface 601 described above, and the side surface of the clamping plate is the surface adjacent to the first surface 601. Optionally, four fasteners 500 are arranged at the four corner positions of the first surface 601 of the clamping plate, and the fixing piece 20 of the fastener anti-loosening device 100 can extend towards the side surface closest to the fastener and be bent and fixed to the side surface, thereby effectively reducing the length of the fixing piece 20 and being beneficial to saving materials.

[0124] The detection clamp prevents the rotation loosening of the fastener 500 in the circumferential direction through the rotation limiting of the fitting part 10 by the fixing of the fixing part 20, thereby realizing the anti-loosening effect of the fastener 500 and improving the detection accuracy of the expansion force of the battery device 700. The fastener anti-loosening device 100 of the structure does not need to additionally drill holes or groove the original standard fastener 500, nor improve the clamping plate, effectively saving the processing cost, and can be assembled after the fastening connection of the fastener 500, thereby improving the assembly efficiency.

[0125] The above description is only preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by the utility model specification and the drawings contents, or direct / indirect application in other related technical fields under the utility model concept of the utility model are included in the patent protection range of the utility model.

Claims

1. A fastener anti -loosening device, characterized by, The head of the fastener is provided with a sink, the fastener is locked to a first surface of a locked structure, the fastener anti-loosening device comprises: a fitting part, which is used for being inserted into the sink in cooperation; and a fixing part, which is connected to the fitting part, has an extending direction, and is arranged at an angle with the axis of the fitting part, and one end of the fixing part away from the fitting part is used for being connected to the locked structure.

2. The fastener anti -loosening device of claim 1, wherein The outer peripheral shape of the cross section of the fitting part is hexagonal.

3. The fastener anti-loosening device as described in claim 1, characterized in that, The fitting part is provided with a through hole, which penetrates the two end faces of the fitting part in the axial direction.

4. The anti -pnlst device of claim 3 wherein, The opening shape of the through hole is hexagonal.

5. The anti -pnlst device of claim 1 wherein, The fitting part is in interference fit with the sink. And / or, the size of the fitting part in the axial direction is the same as the depth of the sink.

6. The fastener lockout of any one of claims 1-5, wherein, One end of the fixing part away from the fitting part is arranged to be bent to form a fitting part, which is arranged to be fitted to the surface adjacent to the first surface.

7. The fastener lock washer of claim 6 wherein: The size of the fitting part in the extending direction of the fixing part is greater than or equal to 5 mm and less than or equal to 10 mm.

8. The fastener lock of claim 6 wherein: The fitting part is provided with a threaded hole, which is used for being threadedly connected to the surface adjacent to the first surface. And / or, the surface of the fitting part is provided with an adhesive, which is used for being bonded to the surface adjacent to the first surface.

9. The fastener lock of claim 6 wherein: The free end of the fitting part is arranged to be bent to be fitted to the surface opposite to the first surface.

10. The fastener lockout of any one of claims 1-5, wherein, The fixing part is provided with at least two, and the at least two fixing parts are connected to the fitting part and arranged at intervals in the circumferential direction of the fitting part.

11. The fastener lock washer of any one of claims 1 to 5, wherein, The fastener anti-loosening device further comprises a covering part, which is at least partially annularly arranged on the peripheral side of the fitting part. One end of the fixing part in the extending direction thereof is connected to the peripheral side of the covering part, and the covering part is used for covering the head end face of the fastener.

12. The fastener lock of claim 11 wherein: The outer peripheral shape of the cross section of the covering part is circular.

13. The fastener lock of claim 12 wherein: The outer diameter of the covering part is the same as the outer diameter of the head of the fastener.

14. The fastener lock of claim 11 wherein: The covering part is located at one end face of the fitting part, and the connection between the fitting part and the covering part is circularly arc transition arranged. And / or, the fitting part, the covering part and the fixing part are integrally formed.

15. The fastener lock washer of any one of claims 1 to 5, wherein, The fixing part is plate-shaped, and the thickness of the fixing part ranges from greater than or equal to 0.8 mm to less than or equal to 1.2 mm.

16. An inspection fixture, characterized by The detection clamp comprises two clamping plates arranged at intervals, a fastener connecting the two clamping plates, and the fastener anti-loosening device as claimed in any one of claims 1 to 15, the fitting part is inserted into the sink, and the fixing part is connected to the clamping plate.

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