An adjustable spanner

Abstract

The utility model relates to the technical field of hardware tools, provide a kind of adjustable wrench of opening degree, including handle and wrench head, further include: sliding slot, at least two sliding slots are along the circumferential interval of wrench head and set in wrench head, the length of sliding slot is along the radial of wrench head and is arranged;Each sliding slot is slidably connected with slider respectively, the end of slider close to the center of wrench head is provided with clamping part, clamping part is used to and the side wall of nut abuts;Threaded hole, each sliding slot is respectively provided with threaded hole away from the center of wrench head, the axis of threaded hole is along the radial of wrench head and is arranged, threaded hole is communicated with sliding slot;Each threaded hole is respectively screw connected with screw rod, the end of screw rod close to the center of wrench head and is abutted with slider.The utility model can overcome the technical problem that existing key wrench can only be adapted with fixed specification nut, staff needs to purchase and carry multiple key wrench, lead to key wrench high use cost and inconvenient to carry.

Description

Technical Field

[0001] This utility model relates to the field of hardware tool technology, and in particular to a wrench with adjustable opening. Background Technology

[0002] A box wrench is a common hardware tool used to tighten or loosen nuts. It generally consists of a handle and a wrench head attached to the end of the handle. The wrench head is roughly ring-shaped, with multiple teeth spaced apart or continuously arranged along the circumference of the wrench head's inner wall. These teeth allow the wrench to grip the side wall of the nut from various angles. Compared to a regular open-end wrench or adjustable wrench, which only has two pliers, a box wrench is more convenient to use.

[0003] However, the teeth of existing box wrenches are generally fixed, so a single wrench can only be used to remove nuts of the corresponding size. Even when using a double-ended box wrench, each box wrench can only be used with two fixed sizes of nuts. However, the nut specifications designed in actual workplaces often exceed two types. Therefore, workers need to buy and carry multiple box wrenches, which is costly and inconvenient to carry. Utility Model Content

[0004] The purpose of this invention is to overcome the technical problem that existing box wrenches can only be used with nuts of fixed specifications, requiring workers to purchase and carry multiple box wrenches, resulting in high usage costs and inconvenience in carrying box wrenches, and to provide a wrench with adjustable opening.

[0005] In a first aspect, the present invention provides a wrench with adjustable opening, including a handle and a wrench head, and further comprising: At least two slides are provided on the wrench head at circumferential intervals, and the length of the slides is provided along the radial direction of the wrench head. Each slide groove is slidably connected to a slider. A locking part is provided at one end of the slider near the center of the wrench head. The locking part extends out of the slide groove along the radial direction of the wrench head and is used to abut against the side wall of the nut. Each slide has a threaded through hole on the side away from the center of the wrench head. The axis of the threaded through hole is set along the radial direction of the wrench head, and the threaded through hole is connected to the slide. Each threaded through hole is threaded with a screw rod, and the end of the screw rod near the center of the wrench head abuts against the slider.

[0006] In this design, the adjustable wrench slides within a groove in the wrench head, engaging with a screw threaded into a through-hole. Rotating the screw moves it radially along the wrench head, causing the slider to move radially as well. This alters the spacing between adjacent sliders to accommodate nuts of different sizes (i.e., changing the wrench's opening). Therefore, this design offers greater versatility compared to box wrenches with fixed teeth, eliminating the need for workers to purchase and carry multiple box wrenches, making it more convenient and cost-effective.

[0007] Meanwhile, this solution slides the slider that directly contacts the nut into the groove. The torque generated when the nut is turned will be directly transmitted to the wrench head body through the side wall of the groove, which can significantly reduce the shear load on the screw and prevent the screw from deforming, jamming, or even breaking due to shear load.

[0008] Furthermore, when the nut is large, the slider in this solution will be adjusted to a position further away from the center of the wrench head, meaning that more of it will be located inside the groove. This increases the contact area between the slider and the groove, thereby improving the load transfer capacity between the slider and the wrench head and ensuring the reliability and service life of this solution when tightening large-sized nuts.

[0009] Preferably, the slider is provided with a limiting groove, and the side of the limiting groove away from the center of the wrench head is provided with an inlet, and a stop structure is connected to the inlet; the screw passes through the inlet and extends into the limiting groove, and the part of the screw located in the limiting groove is detachably connected to an elastic retaining ring, which abuts against the side of the stop structure near the center of the wrench head.

[0010] This design allows the screw to extend into the limiting groove of the slider, and the elastic retaining ring on the screw to abut against the stop structure at the entrance of the limiting groove. This ensures that the slider is not only pushed towards the center of the wrench head by the end of the screw when the screw is close to the center, but also pulled away from the center of the wrench head by the elastic retaining ring when the screw is away from the center. In other words, the slider's movement always follows the screw, preventing the slider from separating from the screw under external forces such as gravity or vibration, thus avoiding a mismatch between the slider's radial position and the screw's position, which would otherwise require manual readjustment.

[0011] Preferably, the handle includes at least two segments, with adjacent segments slidably connected, and the degree of freedom of movement of the slidable connection is set along the length direction of the handle.

[0012] This solution allows for adjustment of the overall length of the handle by sliding the relative segments of two adjacent sections, thus adapting to different working conditions. For example, the handle can be shortened when the solution needs to be stored or when working in a confined space, or the handle can be lengthened when the lever arm needs to be increased.

[0013] Preferably, a locking structure is also provided between two adjacent segments, which is used to lock or unlock the degree of freedom of movement between two adjacent segments.

[0014] This solution can lock the degrees of freedom of movement of two adjacent segments when the handle length needs to be fixed, thereby preventing unexpected changes in the handle length when turning the nut, which could lead to inconvenience or even injury for the operator. When the handle length needs to be adjusted, the degrees of freedom of movement of the two adjacent segments can be unlocked.

[0015] Preferably, the locking structure includes a first limiting hole, a second limiting hole, and a limiting pin; At least one segment is provided with at least two first limiting holes, which are spaced apart along the length of the segment; adjacent segments are provided with second limiting holes, and two adjacent segments can slide relative to each other so that each first limiting hole is aligned with the second limiting hole respectively. The limiting pin is detachably inserted into the aligned first limiting hole and second limiting hole.

[0016] This solution recommends one specific locking structure form, which has the advantages of simple structure and strong load-bearing capacity.

[0017] Preferably, both ends of the handle are connected to a lever.

[0018] This design allows both ends of the handle to be used to tighten nuts. Since the opening of the wrench head is adjustable, the operator can adjust the wrench heads at both ends of the handle to two different commonly used sizes. When it is necessary to repeatedly disassemble and reassemble nuts of these two commonly used sizes, the operator only needs to use the wrench heads at both ends of the handle alternately, without having to repeatedly adjust the position of the screw and slider, which improves the ease of operation of this design.

[0019] Preferably, the diameter of the wrench head at one end of the handle is larger than the diameter of the wrench head at the other end of the handle.

[0020] This solution improves the versatility of the solution by setting the wrench heads at both ends of the handle to be of different sizes, allowing them to have different opening adjustment ranges to accommodate large and small nuts respectively.

[0021] Preferably, a bent section is provided between the handle and the wrench head, and the length direction of the bent section forms an angle with the length direction of the handle.

[0022] This design ensures that the wrench head and handle are not on the same plane, reducing interference between the handle and the nut accessory components and preventing the handle from rotating.

[0023] Preferably, the wrench head is provided with an indicator scale, the indicator scale is located on at least one side of the slider along the circumference of the wrench head, and the length of the indicator scale is set along the radial direction of the wrench head.

[0024] This solution allows staff to quantitatively confirm the position of the slider, thereby improving the efficiency of wrench opening adjustment.

[0025] Preferably, a rotating handle is connected to the end of the screw furthest from the center of the wrench.

[0026] This solution allows staff to easily rotate the screw.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides an adjustable wrench. A slider is slidably connected to the wrench head in a groove, and the slider abuts against a screw threaded into a threaded through-hole. Rotating the screw causes it to move radially along the wrench head, thereby pushing the slider to move radially as well. This allows for changing the distance between the locking parts of adjacent sliders to accommodate nuts of different sizes. Therefore, compared to box wrenches with a fixed locking mechanism, this solution offers better versatility, eliminating the need for workers to purchase and carry multiple box wrenches, making it more convenient and cost-effective. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an adjustable wrench according to the present invention; Figure 2 This is a side view of the adjustable opening wrench of this utility model. Figure 3 This is a front view schematic diagram of the wrench head of an adjustable wrench according to this utility model. Figure 1 ; Figure 4 This is a front view schematic diagram of the wrench head of an adjustable wrench according to this utility model. Figure 2 ; Figure 5 This is a partially enlarged cross-sectional view of the slider of an adjustable wrench according to this utility model. Figure 1 ; Figure 6 This is a partially enlarged cross-sectional view of the slider of an adjustable wrench according to this utility model. Figure 2 ; Figure 7 This is a partial cross-sectional view of the handle of an adjustable wrench according to the present invention. icon: 1-Handle; 11-Segment; 111 - First limiting hole; 112 - Second limiting hole; 113 - Limiting pin; 2-Wrench head; 21-Groove; 22-Slider; 23-Threaded through hole; 24-Screw; 221-Snap-fit ​​part; 222-Limiting groove; 223-Stop structure; 241-Elastic retaining ring; 242-Rotating handle; 3-Elbow section. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0030] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0032] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0033] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0034] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0035] Example 1 Figures 1 to 7 As shown, an adjustable wrench includes a handle 1 and a wrench head 2. The wrench head 2 has at least two grooves 21, which are spaced apart circumferentially along the wrench head 2, and their lengths are radially distributed along the wrench head 2. A slider 22 is slidably connected within each groove 21. A locking portion 221 is provided at one end of each slider 22 near the center of the wrench head 2. The locking portion 221 extends radially from the groove 21 and abuts against the sidewall of the nut. The grooves 21 are further... At least one threaded through hole 23 is provided on one side away from the center of the wrench head 2. The axis of the threaded through hole 23 is arranged radially along the wrench head 2. The threaded through hole 23 is connected to the slide groove 21. A screw 24 is threadedly connected in each threaded through hole 23. The end of the screw 24 near the center of the wrench head 2 passes through the threaded through hole 23 and abuts against the side of the slider 22 away from the center of the wrench head 2. Rotating the screw 24 can make the screw 24 move along the axis of the threaded through hole 23, thereby pushing the slider 22 to move radially along the wrench head 2.

[0036] In an optional embodiment, the slider 22 is provided with a limiting groove 222. The width of the limiting groove 222 along the circumference of the wrench head 2 is greater than the maximum outer diameter of the elastic retaining ring 241 to facilitate the subsequent installation of the elastic retaining ring 241. An inlet is provided on the side of the limiting groove 222 away from the center of the wrench head 2, and a stop structure 223 is connected to the inlet. The screw 24 passes through the inlet and extends into the limiting groove 222. The part of the screw 24 located in the limiting groove 222 is detachably connected to the elastic retaining ring 241. The side of the elastic retaining ring 241 away from the center of the wrench head 2 abuts against the side of the stop structure 223 near the center of the wrench head 2.

[0037] In the above embodiment, the limiting groove 222 has an opening on at least one side along the axis of the wrench head 2. That is, except for the side away from the center of the wrench head 2 which has an entrance, the limiting groove 222 is not sealed on at least one side along the axis of the wrench head 2, which facilitates the subsequent disassembly and assembly of the elastic retaining ring 241.

[0038] In the above embodiments, the specific form of the stop structure 223 includes, but is not limited to, a stop block, a stop ring, or a stop plate, as long as it can reduce the width of the limiting groove 222 at the entrance so as to abut against the elastic stop ring 241 and prevent the slider 22 from separating from the screw 24. It should be noted that in Figures 5 to 6 In the middle, the stop structure 223 and the rest of the slider 22 are separated by a dashed line, which is only for easy identification of the stop structure 223; the stop structure 223 and the rest of the slider 22 can be either an integrated structure or independent components that are connected to each other.

[0039] In an optional embodiment, the handle 1 includes at least two segments 11, with adjacent segments 11 slidably connected. The degree of freedom of movement of the slidable connection is set along the length direction of the handle 1. Specific forms of the slidable connection include, but are not limited to: setting a slide rail slider 22 mechanism or a lead screw mechanism on one segment 11 and connecting the other segment 11 to the slider 22 or lead screw nut; setting one segment 11 as a hollow sleeve structure and fitting the other segment 11 inside the hollow segment 11.

[0040] In an optional embodiment, a locking structure is further provided between two adjacent segments 11. The locking structure is used to lock or unlock the degree of freedom of movement between the two adjacent segments 11. The specific form of the locking structure includes, but is not limited to: a clamp is provided on one segment 11, which can lock the degree of freedom of movement between the two adjacent segments 11 by clamping the other segment 11, and unlock the degree of freedom of movement between the two adjacent segments 11 by releasing the other segment 11; the driving method of the clamp includes, but is not limited to, hydraulic cylinder driving and pneumatic cylinder driving.

[0041] In optional implementations, such as Figure 7 As shown, the locking structure includes a first limiting hole 111, a second limiting hole 112, and a limiting pin 113. At least two first limiting holes 111 are provided on one of the segments 11, and the first limiting holes 111 are spaced apart along the length direction of the segment 11. Second limiting holes 112 are provided on adjacent segments 11, and two adjacent segments 11 can slide relative to each other so that each first limiting hole 111 is aligned with the second limiting hole 112 respectively. The limiting pin 113 is detachably inserted into the aligned first limiting hole 111 and second limiting hole 112, thereby locking two adjacent segments 11 in different relative positions, thereby realizing the stepped adjustment of the length of the handle 1.

[0042] In the above embodiments, in order to prevent the limiting pin 113 from falling off, one of the first limiting hole 111 and the second limiting hole 112 can be designed as a threaded hole, and the limiting pin 113 can be inserted and removed in the first limiting hole 111 and the second limiting hole 112 by rotating the limiting pin 113.

[0043] In optional implementations, such as Figures 1 to 2 As shown, both ends of the handle 1 are connected to a wrench head 2.

[0044] In an optional embodiment, the diameter of the wrench head 2 at one end of the handle 1 is larger than the diameter of the wrench head 2 at the other end of the handle 1.

[0045] In the above embodiments, adjustment range markings are provided at both ends of the handle 1, or adjustment range markings are provided on the wrenches 2 at both ends of the handle 1. The adjustment range markings are used to indicate the opening adjustment range of the wrenches 2 at both ends. For example, “≤30mm” is marked at one end of the handle 1 and “30mm~50mm” is marked at the other end of the handle 1, so as to avoid confusion between the wrenches 2 at both ends by the staff.

[0046] In an optional embodiment, a bend section 3 is provided between the handle 1 and the wrench head 2, and the length direction of the bend section 3 forms an angle with the length direction of the handle 1.

[0047] In an optional embodiment, the wrench head 2 is provided with an indicator scale, which is located on at least one side of the slider 22 along the circumference of the wrench head 2, and the length of the indicator scale is set along the radial direction of the wrench head 2; a pointer can be correspondingly provided on the slider 22, and when the slider 22 moves radially along the wrench head 2, the pointer can be aligned with different positions on the indicator scale, thereby quantitatively indicating the specific position of the slider 22.

[0048] In optional implementations, such as Figure 5 As shown, the end of the screw 24 furthest from the center of the wrench head 2 is connected to a rotating handle 242.

[0049] In optional implementations, such as Figures 3 to 4 As shown, each wrench head 2 has six equally spaced grooves 21, and the number of sliders 22 matches the number of grooves 21, so that the nut can be locked from six different angles to provide the nut with the most sufficient limiting effect.

[0050] In optional embodiments, the specific shape of the latching portion 221 includes, but is not limited to, a planar shape or a toothed shape, for example... Figure 6 As shown, the locking part 221 includes two inclined surfaces arranged sequentially along the circumference of the wrench head 2, and the two inclined surfaces have an included angle of 120°, which can lock the corner of the nut and provide a better limiting effect for the nut.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0052] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable wrench, comprising a handle (1) and a wrench head (2), characterized in that, Also includes: At least two of the slide grooves (21) are arranged at circumferential intervals on the wrench head (2), and the length of the slide grooves (21) is arranged radially on the wrench head (2); Each of the slide grooves (21) is slidably connected to a slider (22). A snap-fit ​​part (221) is provided at one end of the slider (22) near the center of the wrench head (2). The snap-fit ​​part (221) extends out of the slide groove (21) along the radial direction of the wrench head (2). The snap-fit ​​part (221) is used to abut against the side wall of the nut. Threaded through hole (23), each of the slide grooves (21) is provided with a threaded through hole (23) on the side away from the center of the wrench head (2), the axis of the threaded through hole (23) is arranged along the radial direction of the wrench head (2), and the threaded through hole (23) is connected to the slide groove (21); Each of the threaded through holes (23) is threaded with a screw (24), and the end of the screw (24) near the center of the wrench (2) abuts against the slider (22).

2. The adjustable-opening wrench according to claim 1, characterized in that, The slider (22) is provided with a limiting groove (222), and the limiting groove (222) has an entrance on the side away from the center of the wrench (2), and a stop structure (223) is connected to the entrance. The screw (24) passes through the inlet and extends into the limiting groove (222). The portion of the screw (24) located in the limiting groove (222) is detachably connected to an elastic retaining ring (241). The elastic retaining ring (241) abuts against the side of the stop structure (223) near the center of the wrench (2).

3. The adjustable-opening wrench according to claim 1, characterized in that, The handle (1) includes at least two segments (11), and two adjacent segments (11) are slidably connected. The degree of freedom of movement of the slidable connection is set along the length direction of the handle (1).

4. The adjustable-opening wrench according to claim 3, characterized in that, A locking structure is also provided between two adjacent segments (11), which is used to lock or unlock the degree of freedom of movement between two adjacent segments (11).

5. The adjustable-opening wrench according to claim 4, characterized in that, The locking structure includes a first limiting hole (111), a second limiting hole (112), and a limiting pin (113). At least one of the segments (11) is provided with at least two first limiting holes (111), and the first limiting holes (111) are spaced apart along the length direction of the segment (11); adjacent segments (11) are provided with second limiting holes (112), and two adjacent segments (11) can slide relative to each other so that each first limiting hole (111) is aligned with the second limiting hole (112); The limiting pin (113) is detachably inserted into the aligned first limiting hole (111) and second limiting hole (112).

6. A wrench with adjustable opening according to any one of claims 1 to 5, characterized in that, Both ends of the handle (1) are connected to the wrench head (2).

7. A wrench with adjustable opening degree according to claim 6, characterized in that, The diameter of the wrench (2) at one end of the handle (1) is greater than the diameter of the wrench (2) at the other end of the handle (1).

8. A wrench with adjustable opening according to any one of claims 1 to 5, characterized in that, A bend section (3) is provided between the handle (1) and the wrench (2), and the length direction of the bend section (3) is at an angle to the length direction of the handle (1).

9. A wrench with adjustable opening according to any one of claims 1 to 5, characterized in that, The wrench head (2) is provided with an indicator scale, which is located on at least one side of the slider (22) along the circumference of the wrench head (2), and the length of the indicator scale is set along the radial direction of the wrench head (2).

10. A wrench with adjustable opening according to any one of claims 1 to 5, characterized in that, The screw (24) is connected to a rotating handle (242) at one end away from the center of the wrench (2).

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