washer positioning wrench

Abstract

The application relates to the technical field of mechanical tools, and discloses a gasket positioning wrench. The gasket positioning wrench comprises a handle, a gasket positioning mechanism, the gasket positioning mechanism is installed at one end of the handle, the gasket positioning mechanism has a first side and a second side, the gasket positioning mechanism comprises a positioning seat, a positioning assembly and a flexible clasp, a first side end wall of the positioning seat is provided with an adjusting hole, the positioning assembly is movably arranged in the adjusting hole, the positioning assembly is provided with a containing hole, the containing hole is used for containing a nut, the flexible clasp is annularly arranged on the first side end wall of the positioning seat, and the inner diameter size of the flexible clasp is smaller than the outer diameter size of a gasket to be positioned. Therefore, the positioning assembly is moved to adjust the placement position of the nut on the gasket positioning mechanism, then the gasket is positioned by using the flexible clasp, when the gasket positioning wrench delivers the nut and the gasket, the nut and the gasket are not easy to fall off from the wrench, so that the recovery time after the nut and the gasket fall off can be reduced, and the equipment assembling and maintenance time can be reduced.

Description

Technical Field

[0001] This application relates to the field of machine tool technology, and in particular to a washer positioning wrench. Background Technology

[0002] When using bolts and nuts to connect two workpieces, washers are usually installed between the nut and the workpiece. Washers are used to increase the friction between the nut and the bolt. When equipment with bolts and nuts is working in a high-frequency vibration environment, washers can prevent the nut from loosening.

[0003] In related technologies, when the space for installing nuts in precision equipment is limited, wrenches with matching nut shapes and sizes are widely used by assembly personnel to deliver nuts to the installation position. To simultaneously install washers, the assembler places the washer on top of the nut and then uses the wrench to deliver the nut and washer simultaneously to the bolt. By turning the bolt downwards, the bolt passes through the workpiece, washer, and nut, connecting the two workpieces together. If the wrench tilts or collides with the equipment while delivering the washer, the washer may slip off the wrench. If the washer slips into the equipment, locating and recovering the fallen washer requires specialized equipment such as industrial endoscopes. In severe cases, it may be necessary to dismantle related structural components to access the area where the washer fell, thus increasing equipment assembly and maintenance time. Utility Model Content

[0004] The purpose of this application is to increase the difficulty of nuts and washers falling off the wrench, reduce the recovery time after nuts and washers fall off, and reduce equipment assembly and maintenance time.

[0005] To achieve the above objectives, this application provides a washer positioning wrench.

[0006] The washer positioning wrench according to this application includes: a handle; a washer positioning mechanism, which is installed at one end of the handle along its length direction. The washer positioning mechanism has a first side and a second side opposite to each other along a first direction. The washer positioning mechanism includes: a positioning seat, a positioning component, and a flexible retaining ring. The side wall of the positioning seat is connected and engaged with the handle. The first side wall of the positioning seat is provided with an adjustment hole extending along the first direction. The positioning component is movably disposed in the adjustment hole. The positioning component is provided with a receiving hole extending along the first direction for receiving a nut. The flexible retaining ring is ringed on the first side wall of the positioning seat. The flexible retaining ring is adapted to expand or contract radially, and the inner diameter of the flexible retaining ring is smaller than the outer diameter of the washer to be positioned. The inner diameter of the flexible retaining ring is D1, and the outer diameter of the washer to be positioned is D2. D1 and D2 satisfy the relationship: 0.1mm ≤ D2 - D1 ≤ 0.5mm.

[0007] According to the washer positioning wrench of this application, by moving the positioning component to adjust the placement position of the nut on the washer positioning mechanism, and then using the flexible retaining ring to position the washer, it can be ensured that the washer is not pushed out of the flexible retaining ring by the nut. The washer can be reliably positioned on the washer positioning wrench, and the washer can limit the nut. When the washer positioning wrench delivers the nut and washer, it can prevent the nut and washer from falling off the wrench, thereby reducing the recovery time after the nut and washer fall off, and thus reducing the equipment assembly and maintenance time.

[0008] In some examples of this application, the positioning component includes a positioning block and a locking block. The positioning block is provided with the receiving hole, and the locking block is located on the second side of the positioning block. Both the positioning block and the locking block are adapted to move along the inner peripheral wall of the adjustment hole. The positioning block and the locking block lock each other to limit the positioning component to a preset adjustment position within the adjustment hole.

[0009] In some examples of this application, the inner peripheral wall of the adjusting hole is provided with internal threads, and the outer peripheral walls of the positioning block and the locking block are both provided with external threads. The positioning block is threadedly connected to the positioning seat, and the locking block is threadedly connected to the positioning seat.

[0010] In some examples of this application, the locking block has a stop surface that is disposed opposite to the receiving hole, and the stop surface is constructed as a plane.

[0011] In some examples of this application, the locking block has a stop surface that is disposed opposite to the receiving hole. The stop surface has a connecting hole with a diameter smaller than that of the receiving hole, and / or the shape of the connecting hole is different from that of the receiving hole, so that the projection of the receiving hole in the first direction overlaps with a portion of the sidewall of the connecting hole.

[0012] In some examples of this application, the washer positioning mechanism is pivotally engaged with the handle, and the pivot axis of the washer positioning mechanism has an angle with the first direction.

[0013] In some examples of this application, a pivot shaft is provided between the washer positioning mechanism and the handle, the central axis of the pivot shaft being collinear with the pivot axis; a first pivot portion is provided on the side wall of the positioning seat, and a second pivot portion is provided at the end of the handle opposite to the positioning seat; one of the first pivot portion and the second pivot portion protrudes towards the other, and the other is recessed to form a pivot groove; the pivot groove has a first side wall and a second side wall spaced apart along the extension direction of the pivot axis; the first pivot portion and the second pivot portion are inserted into each other and adapted to rotate relative to each other; the pivot shaft passes through the first pivot portion and the second pivot portion, so that the washer positioning mechanism and the handle pivotally engage about the central axis of the pivot shaft.

[0014] In some examples of this application, the sidewalls opposite to the first pivot portion and the second pivot portion are provided with a first locking structure. The first locking structure is located on the outer periphery of the pivot shaft. The sidewalls opposite to the second pivot portion and the first pivot portion are provided with a second locking structure. The first locking structure and the second locking structure are locked together to lock the washer positioning mechanism and the handle at a preset assembly angle.

[0015] In some examples of this application, one of the first locking structure and the second locking structure has a locking protrusion, and the other is constructed as a locking groove, with the locking protrusion extending into the locking groove; there are multiple first locking structures arranged sequentially along the circumference of the pivot axis, and / or there are multiple second locking structures arranged sequentially along the circumference of the pivot axis.

[0016] In some examples of this application, the second locking structure is configured as the locking groove, the first locking structure includes a locking ball and an elastic member, the first pivot portion is provided with a mounting groove, the locking ball is movably disposed in the mounting groove and is adapted to move closer to or away from the locking groove, the end of the locking ball near the locking groove has the locking protrusion, the elastic member is elastically deformable and disposed between the end of the locking ball away from the locking groove and the bottom of the mounting groove, and the elastic member is used to drive the locking ball to move toward the direction closer to the locking groove. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a washer positioning wrench according to an embodiment of this application; Figure 2 This is a schematic diagram of the washer positioning mechanism according to an embodiment of this application; Figure 3 This is a schematic diagram of a portion of the structure of the washer positioning mechanism according to an embodiment of this application; Figure 4This is a top view of a portion of the structure of the washer positioning mechanism according to an embodiment of this application; Figure 5 yes Figure 4 Sectional view at point AA; Figure 6 This is a schematic diagram of the positioning component according to an embodiment of this application; Figure 7 This is a schematic diagram of the positioning block according to an embodiment of this application; Figure 8 This is a schematic diagram of the locking block according to an embodiment of this application; Figure 9 This is a schematic diagram of the handle according to an embodiment of this application.

[0018] In the diagram, 100 represents a washer positioning wrench. 1. Handle; 11. Second pivot part; 111. Pivot groove; 112. First side wall; 113. Second side wall; 114. Second locking structure; 2. Washer positioning mechanism; 21. Positioning seat; 211. Adjustment hole; 212. First pivot part; 213. First locking structure; 214. Locking protrusion; 215. Locking ball; 216. Elastic element; 217. Mounting groove; 22. Positioning component; 221. Receiving hole; 222. Positioning block; 223. Locking block; 224. Stop surface; 225. Communicating hole; 23. Flexible retaining ring; 3. Pivot axis. Detailed Implementation

[0019] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0020] like Figures 1-9 As shown in the illustration, this application discloses a washer positioning wrench 100, which is used to assist in the installation of nuts and washers. The washer positioning wrench 100 is suitable for use in precision equipment, such as in aircraft assembly and maintenance, including wing trailing edge modification, reinstallation of aircraft front and rear cargo hold sills, engine sliding door repair, and engine QEC (Quick Engine Change) installation. The washer positioning wrench 100 according to this application includes a handle 1 and a washer positioning mechanism 2.

[0021] The handle 1 provides a gripping position for the washer positioning wrench 100, allowing maintenance personnel to operate it. Along the length of the handle 1, the washer positioning mechanism 2 is mounted at one end. It should be noted that the length of the handle 1 can refer to... Figure 1 In some embodiments, a washer positioning mechanism 2 can be installed at one end of the handle 1, and the operating part of a conventional wrench can be installed at the other end. In other embodiments, a washer positioning mechanism 2 can be installed at both ends of the handle 1, and the washer positioning mechanisms 2 at both ends of the handle 1 can be adapted to different sizes of nuts and / or washers. This allows a single washer positioning wrench 100 to simultaneously deliver and assemble multiple types of nuts and washers, thereby reducing the number of operating tools that maintenance personnel need to carry.

[0022] Furthermore, the washer positioning mechanism 2 has a first side and a second side opposite to each other along a first direction, wherein the first direction of the washer positioning mechanism 2 can refer to... Figure 1 In the vertical direction, the first side of the washer positioning mechanism 2 can point to... Figure 1 The upper side of the washer positioning mechanism 2, and the second side of the washer positioning mechanism 2 can refer to... Figure 1 The lower side of the washer positioning mechanism 2. The washer positioning mechanism 2 includes: a positioning seat 21, a positioning component 22 and a flexible retaining ring 23. The positioning seat 21 can form the overall frame of the washer positioning mechanism 2. The side wall of the positioning seat 21 is connected and cooperates with the handle 1, realizing the technical effect of the washer positioning mechanism 2 being installed on the handle 1.

[0023] The first side end wall of the positioning seat 21 (i.e. Figure 1 The upper end wall of the positioning seat 21 is provided with an adjustment hole 211 extending in the first direction. The positioning component 22 is movably disposed within the adjustment hole 211, that is, the positioning component 22 can be positioned along the first direction. Figure 1 The nut moves in the vertical direction within the adjustment hole 211. The positioning component 22 is provided with a receiving hole 221 extending in the first direction. The receiving hole 221 is used to receive the nut. The flexible retaining ring 23 is encircled on the first side end wall of the positioning seat 21, and the inner diameter of the flexible retaining ring 23 is smaller than the outer diameter of the washer to be positioned.

[0024] In some specific embodiments, the flexible retaining ring 23 can be a rubber retaining ring. The rubber retaining ring has good elasticity and can be bonded to the positioning seat 21. By expanding and contracting the rubber retaining ring radially, the washer can be positioned inside the rubber retaining ring.

[0025] When delivering nuts and washers, maintenance personnel first adjust the position of positioning component 22 within adjustment hole 211, and then insert the nut from the first side end wall of positioning seat 21 into receiving hole 221 of positioning component 22. At this time, the height of the part of the nut protruding from the first side end wall of positioning seat 21 is less than the thickness of flexible retaining ring 23, so as to prevent the nut from pushing the washer out of flexible retaining ring 23 when the washer is placed on the washer positioning mechanism 2 later.

[0026] According to some specific embodiments of this application, the thickness of the flexible retaining ring 23 can be 0.5mm to 3mm. If the thickness of the flexible retaining ring 23 is too small, it will result in poor elasticity, making it difficult for the flexible retaining ring 23 to effectively position the washer, which may cause the washer to easily come out of the flexible retaining ring 23. If the thickness of the flexible retaining ring 23 is too large, it may easily affect the assembly of the nut and washer on the equipment. Preferably, the thickness of the flexible retaining ring 23 can be 1mm.

[0027] After placing the nut into the receiving hole 221, the maintenance personnel can position the washer inside the flexible retaining ring 23. Specifically, the maintenance personnel can place the washer at the end of the flexible retaining ring 23 away from the positioning seat 21 and then press the washer. Since the outer diameter of the washer is larger than the inner diameter of the rubber retaining ring, pressing the washer can cause the washer to drive the rubber retaining ring to expand radially along the rubber retaining ring. After the washer is pressed into the rubber retaining ring, the rubber retaining ring contracts under its own elastic force, thereby achieving the technical effect of positioning the washer inside the rubber retaining ring.

[0028] Furthermore, let the inner diameter of the flexible retaining ring 23 be D1, and the outer diameter of the washer to be positioned be D2. D1 and D2 satisfy the relationship: 0.1mm ≤ D2 - D1 ≤ 0.5mm. If the difference between the outer diameter of the washer to be positioned and the inner diameter of the flexible retaining ring 23 is too small, the elastic force generated by the flexible retaining ring 23 itself will be too small after the washer is positioned inside the flexible retaining ring 23. When the washer is delivered using the washer positioning wrench 100, the washer is likely to fall out of the flexible retaining ring 23. If the difference between the outer diameter of the washer to be positioned and the inner diameter of the flexible retaining ring 23 is too large, the inner diameter of the flexible retaining ring 23 will be difficult to expand radially to the size of the outer diameter of the washer, making it difficult for the washer positioning wrench 100 to position the washer, thus affecting the assembly and maintenance efficiency of the equipment. In some preferred embodiments, when the diameter of the washer to be positioned is 10mm to 13mm and the flexible retaining ring is made of wear-resistant hard rubber material, the difference between the outer diameter of the washer to be positioned and the inner diameter of the flexible retaining ring 23 can be set to 0.2mm. By driving the inner diameter of the flexible retaining ring 23 to expand by 0.2mm through the washer, the washer can be reliably positioned inside the flexible retaining ring 23.

[0029] Therefore, by moving the positioning component 22 to adjust the position of the nut on the washer positioning mechanism 2, and then using the flexible retaining ring 23 to position the washer, it can be ensured that the washer is not pushed off the flexible retaining ring 23 by the nut. The washer can be reliably positioned on the washer positioning wrench 100, and the washer can limit the nut. When the washer positioning wrench 100 delivers the nut and washer, it can prevent the nut and washer from falling off the wrench, thereby reducing the recovery time after the nut and washer fall off, and thus reducing the equipment assembly and maintenance time.

[0030] like Figure 2 , Figure 3 As shown, in some embodiments of this application, a notch may be provided on the flexible retaining ring 23. By providing the notch, the difficulty of radial expansion of the flexible retaining ring 23 can be reduced. When the washer positioning wrench 100 delivers the washer and nut to the bolt, this setting can reduce the difficulty of the nut and washer moving out of the washer positioning mechanism 2 and reduce the impact of the washer positioning mechanism 2 on the fastener connection effect of the equipment.

[0031] like Figures 6-8 As shown, in some embodiments of this application, the positioning component 22 includes a positioning block 222 and a locking block 223. The positioning block 222 is provided with a receiving hole 221 as described in the above embodiments, that is, the positioning block 222 is used to place the nut, and the locking block 223 is disposed on the second side of the positioning block 222 (i.e., Figure 1 (Lower side of the middle positioning block 222) Both positioning block 222 and locking block 223 are adapted to move along the inner peripheral wall of the adjustment hole 211, and are locked together by positioning block 222 and locking block 223 so that positioning component 22 is limited to a preset adjustment position within the adjustment hole 211.

[0032] It should be noted that the preset adjustment position can be set according to the axial dimension of the nut and the thickness of the flexible retaining ring 23. When the positioning component 22 is in the preset adjustment position, when the nut is placed in the positioning block 222, the height of the second end face of the nut near the washer positioning mechanism 2 is lower than the height of the end face of the flexible retaining ring 23 away from the positioning seat 21. This ensures that the nut does not affect the positioning of the washer by the flexible retaining ring 23. Therefore, by first moving the positioning block 222 to the preset adjustment position and then locking the positioning block 222 with the locking block 223, the movement of the positioning block 222 along the adjustment hole 211 can be prevented as much as possible, improving the user experience of the washer positioning wrench 100.

[0033] like Figure 3 , Figure 6 As shown, in some embodiments of this application, the inner peripheral wall of the adjusting hole 211 is provided with internal threads, and the outer peripheral walls of the positioning block 222 and the locking block 223 are both provided with external threads. The positioning block 222 is threadedly connected to the positioning seat 21, and the locking block 223 is threadedly connected to the positioning seat 21. By threading the positioning block 222 with the positioning seat 21, maintenance personnel can drive the positioning block 222 to rotate relative to the positioning seat 21 to adjust the axial relative position of the positioning block 222 within the positioning seat 21. Using threads to control the relative position between the positioning block 222 and the positioning seat 21 allows for more precise position adjustment of the positioning block 222 compared to driving the positioning block 222 to slide within the adjusting hole 211.

[0034] When the positioning block 222 is in the preset adjustment position, by moving the locking block 223 to abut against the positioning block 222 and twisting the locking block 223 and the positioning block 222 in the opposite direction, the threads between the positioning block 222 and the adjustment hole 211, and between the locking block 223 and the adjustment hole 211, can increase the friction between the locking block 223 and the positioning block 222, thereby enabling the locking block 223 and the positioning block 222 to self-lock.

[0035] like Figure 8 As shown, in some embodiments of this application, the locking block 223 has a stop surface 224, which is disposed opposite to the receiving hole 221. The stop surface 224 can stop the nut, thereby preventing the nut from disengaging from the second side of the washer positioning mechanism 2. In some embodiments, the stop surface 224 can be constructed as a plane, thus ensuring that the receiving hole 221 can be of any shape and / or diameter. The stop surface 224 can always engage with the nut to stop it, thereby improving the versatility of the locking block 223.

[0036] In some other embodiments, the stop surface 224 may be provided with a connecting hole 225, the diameter of which is smaller than that of the receiving hole 221, and / or the shape of the connecting hole 225 is different from that of the receiving hole 221, so that the projection of the receiving hole 221 in the first direction overlaps with the sidewall portion of the connecting hole 225. Alternatively, a positioning block 222 of a different type than the positioning block 222 in the current adjusting hole 211 can be used as a locking block 223, and the diameter of the positioning block 222 used as the locking block 223 is smaller than that of the positioning block 222 in the current adjusting hole 211, to prevent the nut from disengaging from the second side of the washer positioning mechanism 2. This reduces the production cost of the washer positioning wrench 100 and improves its ease of use.

[0037] like Figure 1 As shown, in some embodiments of this application, the washer positioning mechanism 2 pivotally engages with the handle 1, and the pivot axis 3 of the washer positioning mechanism 2 forms an angle with the first direction of the washer positioning mechanism 2. Preferably, the angle between the pivot axis 3 of the washer positioning mechanism 2 and the first direction of the washer positioning mechanism 2 can be 90°. Further, the pivot axis 3 of the washer positioning mechanism 2, the first direction of the washer positioning mechanism 2, and the length direction of the handle 1 are all perpendicular to each other, thus satisfying the delivery requirements of the washer positioning wrench 100 for nuts and washers in different directions.

[0038] When using the washer positioning wrench 100 to deliver nuts and washers to different positions on the equipment, since the handle 1 needs to move to the corresponding position at different angles, by reasonably adjusting the angle between the washer positioning mechanism 2 and the handle 1, it can be ensured that the washers and nuts are kept basically horizontal during delivery, thereby preventing the washers and nuts from falling outside the washer positioning mechanism 2 and improving the assembly and maintenance efficiency of the equipment.

[0039] Furthermore, such as Figure 1 As shown, a pivot shaft 3 is provided between the washer positioning mechanism 2 and the handle 1, and the central axis of the pivot shaft 3 is collinear with the pivot shaft 3 line. A first pivot portion 212 is provided on the side wall of the positioning seat 21, and a second pivot portion 11 is provided at the end of the handle 1 opposite to the positioning seat 21. One of the first pivot portion 212 and the second pivot portion 11 protrudes towards the other, and the other is recessed to form a pivot groove 111. That is, when the first pivot portion 212 protrudes towards the second pivot portion 11, the second pivot portion 11 forms a pivot groove 111, or when the second pivot portion 11 protrudes towards the first pivot portion 212, the first pivot portion 212 forms a pivot groove 111. The pivot groove 111 has an extending direction along the pivot shaft 3 line (i.e.,...). Figure 1 The first sidewall 112 and the second sidewall 113 are spaced apart in the front-back direction. The first pivot part 212 and the second pivot part 11 are inserted and fitted together and are suitable for relative rotation. The gap between the first sidewall 112 and the second sidewall 113 can provide sufficient space for the first pivot part 212 and the second pivot part 11 to move.

[0040] The pivot shaft 3 passes through the first pivot part 212 and the second pivot part 11, so that the washer positioning mechanism 2 and the handle 1 pivotally engage around the central axis of the pivot shaft 3. By rotating the washer positioning mechanism 2 relative to the handle 1 along the pivot shaft 3, the technical effect of the washer positioning mechanism 2 rotating relative to the handle 1 along the pivot shaft 3 can be achieved.

[0041] like Figure 2 , Figure 5 As shown in some embodiments of this application, the sidewalls opposite to the first pivot 212 and the second pivot 11 may be provided with a first locking structure 213. The first locking structure 213 is located on the outer periphery of the pivot shaft 3. The sidewalls opposite to the second pivot 11 and the first pivot 212 are correspondingly provided with a second locking structure 114. The first locking structure 213 and the second locking structure 114 lock together to lock the washer positioning mechanism 2 and the handle 1 at a preset assembly angle. When the washer positioning wrench 100 delivers the nut and the washer, by using the locking engagement of the first locking structure 213 and the second locking structure 114 to restrict the rotation of the washer positioning mechanism 2 relative to the handle 1, the tilting of the washer positioning mechanism 2 can be prevented from affecting the fastener connection effect of the equipment, thus improving the user experience of the washer positioning wrench 100.

[0042] like Figure 2 , Figure 5 As shown, in some embodiments of this application, one of the first locking structure 213 and the second locking structure 114 has a locking protrusion 214, and the other is configured as a locking groove. The locking protrusion 214 extends into the locking groove. For example, the first locking structure 213 has a locking protrusion 214 and the second locking structure 114 is configured as a locking groove, or the second locking structure 114 has a locking protrusion 214 and the first locking structure 213 is configured as a locking groove. The locking protrusion 214 can protrude away from the corresponding pivot (i.e., the first pivot 212 or the second pivot 11). Preferably, the outer surface of the locking protrusion 214 can be spherical, which facilitates the sliding of the locking protrusion 214 into the locking groove and reduces the difficulty of locking the first locking structure 213 and the second locking structure 114 together. Meanwhile, the inner wall of the locking groove can be constructed as an arc surface. When the maintenance personnel rotate the washer positioning mechanism 2 along the pivot axis 3, the arc surface can generate a component force that drives the locking protrusion 214 away from the locking groove, thereby making it easier for the locking protrusion 214 to come out of the locking groove, thus improving the ease of use of the washer positioning wrench 100.

[0043] Furthermore, in some embodiments, there are multiple first locking structures 213, which are arranged sequentially along the circumference of the pivot axis 3, and / or, there are multiple second locking structures 114, which are arranged sequentially along the circumference of the pivot axis 3. That is, there can be multiple first locking structures 213, or multiple second locking structures 114, or both the first locking structure 213 and the second locking structure 114 can be multiple.

[0044] When there is one locking protrusion 214 and multiple locking grooves, the locking protrusion 214 can extend into one of the locking grooves to restrict the rotation of the washer positioning mechanism 2 relative to the handle 1. When there is one locking protrusion 214 and multiple locking grooves, the locking protrusion 214 can extend into the locking groove with the closest spacing to restrict the rotation of the washer positioning mechanism 2 relative to the handle 1. When there are multiple locking protrusions 214 and one locking groove, the locking protrusion 214 with the closest spacing to the locking groove can extend into the locking groove to restrict the rotation of the washer positioning mechanism 2 relative to the handle 1. When there are multiple locking protrusions 214 and multiple locking grooves, at least one set of locking protrusions 214 and locking grooves are locked together, thereby restricting the rotation of the washer positioning mechanism 2 relative to the handle 1. Preferably, multiple sets of locking protrusions 214 and locking grooves can be locked together, which can increase the locking force between the washer positioning mechanism 2 and the handle 1.

[0045] Furthermore, such as Figure 2 , Figure 9As shown, the second locking structure 114 is constructed as a locking groove, and the first locking structure 213 includes a locking ball 215 and an elastic element 216. The first pivot portion 212 is provided with a mounting groove 217, which is located on the side wall of the first pivot portion 212 opposite to the second pivot portion 11. The mounting groove 217 is adapted to be directly opposite the locking groove. The locking ball 215 is movably disposed in the mounting groove 217 and is adapted to move closer to or away from the locking groove. Specifically, part of the structure of the locking ball 215 is located in the mounting groove 217, and the other part is located outside the mounting groove 217. By extending or extending the locking ball 215 into or out of the mounting groove 217, the locking ball 215 can be moved away from or closer to the locking groove.

[0046] The surface of the locking ball 215 near the locking groove is constructed as a locking protrusion 214. By inserting the locking ball 215 into the locking groove, the technical effect of locking the first locking structure 213 and the second locking structure 114 can be achieved. The elastic element 216 is elastically deformable and disposed between the part of the locking ball 215 away from the locking groove and the bottom of the mounting groove 217. Specifically, the elastic element 216 can be a helical spring, and the direction of contraction and extension of the helical spring is the same as the direction of movement of the locking ball 215. The elastic element 216 is used to drive the locking ball 215 to move towards the locking groove.

[0047] When the locking ball 215 is inserted into the locking groove, the distance between the locking ball 215 and the bottom of the mounting groove 217 is less than the initial length of the coil spring. The coil spring is compressed and generates elastic force. The elastic force of the coil spring can continuously drive the locking ball 215 to be inserted into the mounting groove 217, so as to ensure that the first locking structure 213 and the second locking structure 114 remain locked. This prevents the washer positioning mechanism 2 from rotating relative to the handle 1 when the washer positioning wrench 100 delivers the nut and washer, thus improving the user experience of the washer positioning wrench 100.

[0048] Furthermore, when it is necessary to adjust the angle between the washer positioning mechanism 2 and the handle 1, the maintenance personnel can apply a large rotational torque between the washer positioning mechanism 2 and the handle 1. When the axial component of the rotational force applied to the locking ball 215 is greater than the elastic force of the elastic element 216, the locking ball 215 can move away from the locking groove, thereby unlocking the first locking structure 213 and the second locking structure 114. After the washer positioning mechanism 2 and the handle 1 are readjusted to a suitable angle, the locking ball 215 can be inserted into the locking groove with the closest spacing, thereby relocking the first locking structure 213 and the second locking structure 114.

[0049] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A washer positioning wrench, characterized in that, include: handle; A washer positioning mechanism is installed at one end of the handle along its length. The washer positioning mechanism has a first side and a second side opposite to each other along a first direction. The washer positioning mechanism includes a positioning seat, a positioning component, and a flexible retaining ring. The side wall of the positioning seat is connected and engaged with the handle. The first side end wall of the positioning seat is provided with an adjustment hole extending along the first direction. The positioning component is movably disposed in the adjustment hole. The positioning component is provided with a receiving hole extending along the first direction for receiving a nut. The flexible retaining ring is ringed on the first side end wall of the positioning seat. The flexible retaining ring is adapted to expand or contract radially, and the inner diameter of the flexible retaining ring is smaller than the outer diameter of the washer to be positioned. The inner diameter of the flexible retaining ring is D1, and the outer diameter of the washer to be positioned is D2. D1 and D2 satisfy the relationship: 0.1mm≤D2-D1≤0.5mm.

2. The washer positioning wrench according to claim 1, characterized in that, The positioning component includes a positioning block and a locking block. The positioning block is provided with the receiving hole, and the locking block is located on the second side of the positioning block. Both the positioning block and the locking block are adapted to move along the inner peripheral wall of the adjustment hole. The positioning block and the locking block lock each other to limit the positioning component to a preset adjustment position within the adjustment hole.

3. The washer positioning wrench according to claim 2, characterized in that, The inner peripheral wall of the adjusting hole is provided with internal threads, and the outer peripheral walls of the positioning block and the locking block are both provided with external threads. The positioning block is threadedly connected to the positioning seat, and the locking block is threadedly connected to the positioning seat.

4. The washer positioning wrench according to claim 2 or 3, characterized in that, The locking block has a stop surface, which is disposed opposite to the receiving hole, and the stop surface is constructed as a plane.

5. The washer positioning wrench according to claim 2 or 3, characterized in that, The locking block has a stop surface, which is disposed opposite to the receiving hole. The stop surface has a connecting hole, the diameter of which is smaller than the diameter of the receiving hole, and / or... The shape of the connecting hole is different from the shape of the receiving hole, so that the projection of the receiving hole in the first direction overlaps with the sidewall portion of the connecting hole.

6. The washer positioning wrench according to claim 1, characterized in that, The washer positioning mechanism pivotally engages with the handle, and the pivot axis of the washer positioning mechanism forms an angle with the first direction.

7. The washer positioning wrench according to claim 6, characterized in that, A pivot shaft is provided between the washer positioning mechanism and the handle, and the central axis of the pivot shaft is collinear with the pivot axis. The positioning seat has a first pivot portion on its side wall, and the handle has a second pivot portion at its end opposite to the positioning seat. One of the first pivot portion and the second pivot portion protrudes towards the other, and the other is recessed to form a pivot groove. The pivot groove has a first side wall and a second side wall spaced apart along the extension direction of the pivot axis. The first pivot portion and the second pivot portion are inserted into each other and are adapted to rotate relative to each other. The pivot axis passes through the first pivot portion and the second pivot portion so that the washer positioning mechanism and the handle pivot around the central axis of the pivot axis.

8. The washer positioning wrench according to claim 7, characterized in that, The first pivot portion and the second pivot portion have a first locking structure on their opposite sidewalls. The first locking structure is located on the outer periphery of the pivot shaft. The second pivot portion and the first pivot portion have a corresponding second locking structure on their opposite sidewalls. The first locking structure and the second locking structure lock together to lock the washer positioning mechanism and the handle at a preset assembly angle.

9. The washer positioning wrench according to claim 8, characterized in that, One of the first locking structure and the second locking structure has a locking protrusion, and the other is constructed as a locking groove, with the locking protrusion extending into the locking groove; The first locking structure is a plurality of such structures, which are arranged sequentially along the circumference of the pivot axis, and / or the second locking structure is a plurality of such structures, which are arranged sequentially along the circumference of the pivot axis.

10. The washer positioning wrench according to claim 9, characterized in that, The second locking structure is configured as the locking groove. The first locking structure includes a locking ball and an elastic element. The first pivot portion is provided with a mounting groove. The locking ball is movably disposed in the mounting groove and is adapted to move closer to or away from the locking groove. The end of the locking ball near the locking groove has the locking protrusion. The elastic element is elastically deformable and disposed between the end of the locking ball away from the locking groove and the bottom of the mounting groove. The elastic element is used to drive the locking ball to move toward the direction closer to the locking groove.

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