Tightening wrench

Abstract

The utility model discloses a tightening wrench, relates to the technical field of mechanical wrenches, and solves the problem that the tightening task of a nut is difficult to be effectively and quickly completed when the nut tightening operation is performed in a narrow space in the existing technical scheme. The tightening wrench comprises a fastening piece and a holding piece, the fastening piece is connected with a to-be-tightened structure, and the holding piece is used for being held by a user and controlling the fastening piece to rotate; the fastening piece comprises a clamping ring part, a plurality of clamping tooth pieces are installed in the direction perpendicular to the cambered surface of the clamping ring part, and the clamping tooth pieces are used for being embedded into a to-be-tightened structure. According to the utility model, the plurality of latches are arranged on the snap ring part, the latch piece can be embedded into a structure to be tightened, and the wrench is allowed to avoid any obstacles such as cables during operation through the latch piece and can be firmly engaged with the structure to be tightened, so that the structure to be tightened is prevented from being damaged. The problem that due to space limitation, a traditional tool is difficult to effectively tighten a tightening structure is effectively solved, and operation convenience and reliability in a narrow space are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical spanner technical field especially relates to a tightening spanner. BACKGROUND

[0002] In the cable clamping structure of the tail of the charging gun, the cable is usually fixed by means of a nut. However, in the actual production process, due to the strict requirement of product design on the internal space of the shell, it is difficult to use traditional tools to effectively tighten the nut located in the narrow space during the assembly stage. Especially when the nut is completely locked to be flush with the mouth of the shell, ordinary tools often cannot effectively contact the nut due to insufficient space, and thus cannot provide sufficient tightening torque for it.

[0003] Therefore, there is an urgent need for a tool that can be flexibly operated in a limited space and reliably tighten the nut. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a tightening spanner to solve the problem that the existing technical solution cannot effectively and quickly complete the tightening task of the nut when facing the nut tightening operation in a narrow space.

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

[0006] In the first aspect, the utility model provides a tightening spanner, which comprises a fastener and a holding piece. The fastener is connected with a structure to be tightened, and the holding piece is used for the user to hold and control the rotation of the fastener.

[0007] The fastener comprises a clasp ring part, and a plurality of clamping teeth are installed in the direction perpendicular to the arc surface of the clasp ring part. The clamping teeth are used for embedding the structure to be tightened.

[0008] Preferably, the tightening spanner further comprises an extension piece. The first end of the extension piece is connected with the fastener, and the second end of the extension piece is connected with the holding piece.

[0009] Preferably, the fastener further comprises a connecting part. The first head of the connecting part is connected with the clasp ring part, and the second head of the connecting part is connected with the first end.

[0010] Preferably, the second end is in the shape of a cylinder, and a square insertion interface recessed along the length direction of the extension piece is arranged at the central part of the end face.

[0011] Preferably, the end face of the second head is in the shape of a square column, and the second head is inserted into the insertion interface for fixation.

[0012] Preferably, the arc surface of the clasp ring part is provided with mounting holes and mounting grooves, and the mounting holes are arranged at the bottom of the mounting grooves.

[0013] The clamping teeth comprise a clamping end and an abutting end, the clamping end is arranged outside the mounting holes, and the abutting end is embedded in the mounting grooves.

[0014] Preferably, the clamping teeth and the clasp ring part are integrally connected.

[0015] Preferably, the clasp ring part and the connecting part are integrally designed.

[0016] Preferably, the diameter of the holding part is larger than that of the lengthening piece.

[0017] Preferably, a plurality of convex stripes are arranged on the surface of the holding part at a predetermined distance.

[0018] Preferably, the second head surface is provided with a pressing piece for abutting against the inner wall of the insertion port to fix the connection between the fastener and the lengthening piece.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the technical scheme provides a new tightening wrench design, the tightening wrench comprises a fastener and a holding piece, the fastener is provided with a clasp ring part, and a plurality of clamping teeth are arranged on the fastener in the direction perpendicular to the clasp ring part, the clamping teeth can be embedded into a structure to be tightened, the clamping teeth allow the wrench to avoid any obstacles such as cables during operation, and the structure to be tightened can be firmly engaged, thereby ensuring that the structure to be tightened will not slip during tightening. Meanwhile, the holding piece not only provides a force point for a user to exert a rotating torque, but also realizes the labor-saving effect by increasing the force arm, so that the user can easily complete the tightening work of the nut even in a narrow space.

[0020] In conclusion, the tightening wrench effectively solves the problem that the traditional tool is difficult to effectively tighten the tightening structure due to space limitation, and ensures the operation convenience and reliability in a narrow space. In addition, due to the height design of the tightening structure, the tightening structure can be hidden in the shell after assembly and not exposed, which not only improves the appearance of the product, but also improves the overall coordination of the product. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor.

[0022] The structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, to enable a person skilled in the art to understand and read, and are not used to limit the conditions that can be implemented by the utility model, and therefore do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0023] Figure 1 A structure schematic view of the tightening wrench provided for Embodiment 1 is shown in the figure.

[0024] Figure 2 A structure schematic view of the tightening wrench provided for Embodiment 1 is shown in the figure.

[0025] Figure 3 An assembly structure schematic view of the tightening wrench provided for Embodiment 1 for tightening the structure to be tightened is shown in the figure.

[0026] Figure 4 An assembly structure schematic view of the tightening wrench provided for Embodiment 1 for tightening the structure to be tightened is shown in the figure.

[0027] Illustration:

[0028] 100, structure to be tightened; 200, tightening wrench; 300, charging gun; 21, fastener; 211, clasp part; 2111, mounting hole; 2112, mounting groove; 212, connecting part; 2121, first head; 2122, second head; 2123, pressing piece; 213, empty space; 22, holding piece; 221, protruding stripe; 23, clamping piece; 231, clamping end; 232, abutting end; 24, lengthening piece; 241, first end; 242, second end; 2421, insertion port. DETAILED DESCRIPTION

[0029] In order to make the utility model purposes, features, advantages of the utility model more obvious and easy to understand, the technical solutions in the utility model embodiments will be clearly and completely described below in combination with the drawings in the utility model embodiments. Obviously, the embodiments described below are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by a person skilled in the art without creative labor fall within the scope of protection of the utility model.

[0030] In the description of the utility model, it is understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0031] The technical solutions of the utility model are further illustrated below in combination with the drawings and through specific embodiments.

[0032] Embodiment 1

[0033] When assembling the charging gun 300, the space at the tail end is small, and it is quite inconvenient to tighten the nut by the user's hand or the existing tightening device.

[0034] Please refer to Figures 1-4 The utility model embodiment provides a kind of tightening wrench 200, the tightening wrench 200 includes fastener 21 and gripping piece 22, the fastener 21 is connected with the structure 100 to be tightened, and the gripping piece 22 is used for user holds and controls the fastener 21 rotation;

[0035] The fastener 21 includes snap ring part 211, is installed with multiple clamping tooth pieces 23 in the direction of vertical arc surface of the snap ring part 211, and the clamping tooth piece 23 is used to embed the structure 100 to be tightened.

[0036] Specifically, the fastener 21 is used to be connected with the structure 100 (for example nut) to be tightened, and the tightening wrench 200 is closely connected with the target object to be tightened;The gripping piece 22 is used for user to hold and exert rotational force in the use process, and the user can conveniently control the rotation of the fastener 21 by the gripping piece 22, so as to realize the tightening of the target object, extend the arm at the same time, and the gripping piece 22 can also help user to save strength;The snap ring part 211 is half-ring structure, and is used to surround the structure 100 to be tightened, and serves as the installation basis of clamping tooth piece 23;The clamping tooth piece 23 is arranged on the snap ring part 211, and the clamping tooth piece 23 can better embed and engage the structure 100 to be tightened, to prevent slipping phenomenon from occurring in the tightening process.

[0037] Further, the snap ring part 211 is provided with empty space 213 for cable to pass through, and the empty space 213 is used for cable to pass through, so that when the nut is fastened by the tightening wrench, the process of rotational tightening is avoided from the interference of cable.

[0038] The embodiment provides a new tightening wrench 200 design, which comprises a fastener 21 and a holding piece 22, the fastener 21 is provided with a clasp part 211, and a plurality of clamping tooth parts 23 are arranged on the fastener 21 in a direction perpendicular to the clasp part 211, the clamping tooth parts 23 can be embedded into a structure 100 to be tightened, the clamping tooth parts 23 allow the wrench to avoid any obstacles such as cables and the like during operation, and the wrench can firmly engage the nut, so that the nut is not slipped during the tightening process. Meanwhile, the holding piece 22 not only provides a force point for a user to exert a rotating torque, but also realizes the labor-saving effect by increasing the force arm, so that the user can easily complete the nut tightening work in a narrow space.

[0039] The tightening wrench 200 provided by the embodiment effectively solves the problem that the conventional tool is difficult to effectively tighten the nut due to space limitation, and ensures the operation convenience and reliability in a narrow space. In addition, due to the height design of the nut, the nut can be hidden in the shell after assembly and is not exposed, which not only improves the appearance of the product, but also improves the overall coordination of the product.

[0040] In an embodiment, as shown in Figure 1 and Figure 2 The tightening wrench 200 further comprises an elongated piece 24, a first end 241 of the elongated piece 24 is connected with the fastener 21, and a second end 242 of the elongated piece 24 is connected with the holding piece 22.

[0041] Specifically, the force arm is increased by arranging the elongated piece 24 to achieve the labor-saving effect, and the operation in a narrow space is facilitated.

[0042] The first end 241 of the elongated piece 24 is connected with the fastener 21, the force of the fastener 21 is transmitted to the holding piece 22, and meanwhile, it is ensured that the fastener 21 can accurately act on the nut to be tightened; the second end 242 of the elongated piece 24 is connected with the holding piece 22, so that the user can exert a rotating torque through the holding piece 22, and the exertion effect is amplified through the length of the elongated piece 24, so that the nut can be tightened more easily.

[0043] Preferably, the diameter size of the holding part is greater than the diameter size of the elongated piece 24, so as to provide better holding feeling and control force for the user. The larger diameter of the holding part enables the user to hold the tool more firmly during use, reduces hand fatigue, and can control the tightening degree more accurately. The smaller diameter of the elongated piece 24 helps to reduce the weight, reduce the material cost, and facilitate the operation in a narrow space.

[0044] In an embodiment, as shown in Figure 1 and Figure 2As shown, the fastener 21 further comprises a connecting portion 212, a first head 2121 of the connecting portion 212 is connected with the snap ring portion 211, and a second head 2122 of the connecting portion 212 is connected with the first end 241.

[0045] Specifically, the connecting portion 212 is used to connect the elongated member 24 and the snap ring portion 211, and to fix and support the snap ring portion 211. The first head 2121 of the connecting portion 212 is connected with the snap ring portion 211 of the fastener 21, which ensures the strength of the fastener 21, thereby maintaining the reliable connection between the fastener 21 and the structure 100 to be tightened during the tightening process. The second head 2122 of the connecting portion 212 is connected with the elongated member 24, which ensures sufficient strength between the fastener 21 and the elongated member 24, and ensures the stability of the entire tool, so as to facilitate the user to exert the rotating force.

[0046] Preferably, the snap ring portion 211 and the connecting portion 212 are designed in an integrated manner.

[0047] In an embodiment, as shown in Figure 1 and Figure 2 The second end 242 is in a cylindrical shape, and a plug-in interface 2421 recessed along the length direction of the elongated member 24 is arranged at the central part of the end face of the second end 242.

[0048] The second head 2122 is preferably in a square column shape, and the second head 2122 is inserted into the plug-in interface 2421 for fixation.

[0049] Specifically, the square plug-in interface 2421 and the square column-shaped second head 2122 are matched and installed, so that the second head 2122 can be fixed in the plug-in interface 2421. When the fastener 21 is controlled to rotate by the holding member 22, the connecting portion 212 and the elongated member 24 will not rotate relative to each other, which ensures the rotation and tightening of the fastener 21 to the structure 100 to be tightened.

[0050] Meanwhile, the plug-in assembly of the second end 242 and the second head 2122 enables the fastener 21 installed on the elongated member 24 to be quickly disassembled, and the fastener 21 with a snap ring portion 211 of appropriate size can be quickly selected and installed according to the size of the structure 100 to be tightened.

[0051] In an embodiment, as shown in Figure 1 and Figure 2 The arc surface of the snap ring portion 211 is spaced apart to form an installation hole 2111 and an installation slot 2112, and the installation hole 2111 is arranged at the bottom of the installation slot 2112.

[0052] The clamping tooth piece 23 comprises a clamping end 231 and an abutting end 232. The clamping end 231 is arranged outside the mounting hole 2111 through the mounting hole 2111. The abutting end 232 is embedded in the mounting groove 2112.

[0053] Specifically, the clamping tooth piece 23 and the clamping ring part 211 can be quickly mounted and dismounted. A plurality of regularly arranged columns of mounting holes 2111 are arranged on the arc surface of the clamping ring part 211. Each mounting hole 2111 is in communication with a mounting groove 2112.

[0054] The clamping end 231 of the clamping tooth piece 23 is arranged in the mounting hole 2111 at the bottom of the mounting groove 2112 from the slot of one arc surface of the mounting groove 2112, and is vertically arranged on another arc surface through the mounting hole 2111.

[0055] According to the space size and depth of the installation space of the structure 100 to be tightened, the clamping tooth piece 23 with a suitable length of the clamping end 231 and the fastener 21 are selected. When the structure 100 to be tightened needs to be installed in a relatively deep space, the clamping ring part 211 cannot enter to be rotated and tightened due to the small space. The clamping tooth piece 23 with a longer clamping end 231 is installed on the clamping ring part 211, so that the clamping end 231 can be embedded in the structure 100 to be tightened to drive the structure 100 to be tightened to be rotated and tightened. The abutting end 232 is embedded in the mounting groove 2112 and abuts against the clamping ring part 211 to be fixed.

[0056] Generally, the structure 100 to be tightened is a nut, and a clamping interface for inserting the clamping end 231 is arranged on the nut.

[0057] In another embodiment, as shown in Figure 1 and Figure 2 The clamping tooth piece 23 and the clamping ring part 211 are integrally connected.

[0058] Specifically, the structure 100 to be tightened is a nut. When the nut needs to be tightened and fixed, a magnetic piece is adsorbed and fixed on the nut. The magnetic piece is provided with a clamping interface matched in size with the clamping tooth piece 23 integrally fixed with the clamping ring part 211. The clamping end 231 of the clamping tooth piece 23 on the clamping ring part 211 is embedded in the clamping interface. The tightening wrench 200 is rotated to drive the nut to be rotated and tightened through the magnetic piece.

[0059] Preferably, the clamping ring part 211 and the connecting part 212 are integrally designed. The clamping ring part 211 and the connecting part 212 are integrally connected to strengthen the strength of the fastener 21.

[0060] In an embodiment, as shown in Figure 1 and Figure 2As shown, the holding part surface is provided with a plurality of convex stripes 221 at a predetermined distance.

[0061] Specifically, the holding part surface is the surface of the part directly contacted by the user when holding the tool; the convex stripe 221 is a wide strip-shaped protrusion with a certain height provided on the holding part surface.

[0062] The holding part surface is provided with a plurality of convex stripes 221 at a predetermined distance, which can increase the friction coefficient of the holding part surface, so that the user can hold the tool more stably, prevent hand slipping, effectively improve the friction between the hand and the tool, and thus make the user safer and more convenient in use.

[0063] In an embodiment, as shown in Figure 1 and Figure 2 Figure 1 Figure 2 The second head 2122 is provided with a pressing piece 2123, which is used to abut against the inner wall of the plug-in interface 2421 to fix the connection between the fastener 21 and the extension piece 24.

[0064] Specifically, a pressing piece 2123 is arranged on the surface of the second head 2122 of the connecting part 212, so that when the fastener 21 is connected with the extension piece 24, the fixed connection between the fastener 21 and the extension piece 24 is realized through the interaction between the pressing piece 2123 and the inner wall of the plug-in interface 2421. It is ensured that the fastener 21 will not easily separate from the extension piece 24 during the tightening process, and the stability and safety of the operation are improved.

[0065] In this embodiment, the pressing piece 2123 abuts against the inner wall of the plug-in interface 2421 to fix the connection between the fastener and the extension piece: after being inserted into the plug-in interface, the pressing piece will be in contact with the inner wall, and through a certain pre-tightening force, the connection between the fastener and the extension piece is kept stable, preventing loosening during use.

[0066] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tightening wrench (200) characterized by, The tightening wrench (200) comprises a fastener (21) and a holding member (22), the fastener (21) is connected with a structure (100) to be tightened, and the holding member (22) is used for a user to hold and control the fastener (21) to rotate. The fastener (21) comprises a clasp portion (211), a plurality of clamping teeth (23) are installed in the direction of the arc surface of the clasp portion (211), and the clamping teeth (23) are used for embedding the structure (100) to be tightened.

2. The tightening wrench (200) according to claim 1, characterized in that The tightening wrench (200) further comprises an extension member (24), a first end (241) of the extension member (24) is connected with the fastener (21), and a second end (242) of the extension member (24) is connected with the holding member (22).

3. The tightening wrench (200) according to claim 2, characterized in that The fastener (21) further comprises a connecting portion (212), a first head (2121) of the connecting portion (212) is connected with the clasp portion (211), and a second head (2122) of the connecting portion (212) is connected with the first end (241).

4. The tightening wrench (200) according to claim 3, characterized in that The second end (242) is in a cylindrical shape, and a square insertion interface (2421) recessed in the length direction of the extension member (24) is arranged at the center of the end face of the second end (242). The second head (2122) is in a square column shape, and the second head (2122) is inserted into the insertion interface (2421) to be fixed.

5. The tightening wrench (200) according to any one of claims 1-4, characterized in that The clasp portion (211) is provided with an installation hole (2111) and an installation groove (2112) at intervals in the arc surface, and the installation hole (2111) is arranged at the bottom of the installation groove (2112). The clamping teeth comprise a clamping end (231) and an abutting end (232), the clamping end (231) passes through the installation hole (2111) and is arranged outside the installation hole (2111), and the abutting end (232) is embedded in the installation groove (2112) to be installed.

6. The tightening wrench (200) according to any one of claims 2-4, characterized in that The clamping teeth (23) and the clasp portion (211) are integrally connected.

7. The tightening wrench (200) according to any one of claims 3-4, characterized in that, The clasp portion (211) and the connecting portion (212) are integrally designed.

8. The tightening wrench (200) according to any one of claims 2-4, characterized in that The diameter size of the holding member (22) is greater than the diameter size of the extension member (24).

9. The tightening wrench (200) according to claim 8, characterized in that A plurality of convex stripes (221) are arranged at intervals on the surface of the holding portion at a predetermined distance.

10. The tightening wrench (200) according to claim 4, characterized in that A pressing member (2123) is arranged on the surface of the second head (2122), and the pressing member (2123) is used for abutting against the inner wall of the insertion interface (2421) to fix the connection between the fastener (21) and the extension member (24).

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