Length-adjustable wrench

Abstract

The utility model discloses a length-adjustable wrench, and belongs to the technical field of wrenches. The handle rod is connected with the wrench head; the handle is connected with the handle rod; the telescopic assembly is arranged in the handle, and the telescopic assembly comprises a telescopic cavity, a piston and a valve body; wherein the piston is arranged in the telescopic cavity, the piston divides the telescopic cavity into a high-pressure chamber and a low-pressure chamber, the handle rod extends into the telescopic cavity to be connected with the piston, the telescopic cavity is provided with a connecting channel, the connecting channel is connected between the high-pressure chamber and the low-pressure chamber, the valve body is used for controlling connection and disconnection of the connecting channel, and the valve body is provided with a first spring. According to the wrench, the convenience of length adjustment of the wrench is guaranteed, and the stability of the wrench after length adjustment is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of wrenches, and in particular relates to a length-adjustable wrench. Background Art

[0002] A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts and other threaded fasteners with openings or holes. A wrench usually has an opening or hole for clamping a bolt or nut at one or both ends of the handle. When used, an external force is applied to the handle along the direction of thread rotation to turn the bolt or nut. Due to design defects, the length of existing wrenches is generally fixed. During use, the lever arm is not long enough, so improvements are made. Summary of the invention

[0003] The purpose of the present application is to provide a length-adjustable wrench to address the above-mentioned technical problems, thereby ensuring the convenience of adjusting the length of the wrench and improving the stability of the wrench after the length is adjusted.

[0004] The present application provides a length-adjustable wrench, comprising:

[0005] Wrench head;

[0006] A handle rod, mounted and connected with the wrench head;

[0007] A handle connected to the handle;

[0008] A telescopic assembly is placed in the handle, and the telescopic assembly includes a telescopic chamber, a piston, and a valve body;

[0009] Among them, the piston is placed in the telescopic chamber, and the piston divides the telescopic chamber into a high-pressure chamber and a low-pressure chamber. The handle rod extends into the telescopic chamber and is connected to the piston. The telescopic chamber is provided with a connecting channel, and the connecting channel is connected between the high-pressure chamber and the low-pressure chamber. The connection and disconnection of the connecting channel is controlled by a valve body, and the valve body is provided with a first spring.

[0010] The wrench head is used to tighten fasteners such as bolts and nuts. The handle is rigidly connected to the wrench head. When the overall length of the wrench needs to be adjusted, it is adjusted through the telescopic assembly, and the connecting channel is opened through the valve body. When the handle and the handle are in a free state and are not subject to external force, under the interaction of the air pressure in the high-pressure chamber and the low-pressure chamber, the piston is placed in the telescopic chamber and moves, and the handle is extended from the telescopic chamber, so that the overall length of the wrench is lengthened. When the handle and the handle are under the action of external force, the handle and the handle are brought close to each other, the piston moves in the telescopic chamber, and the handle contracts into the telescopic chamber, so that the overall length of the wrench is shortened. After the adjustment is completed, the connecting channel is closed again through the valve body.

[0011] Furthermore, the handle is provided with an adjustment component corresponding to the valve body.

[0012] The regulating component is used to control the opening and closing of the valve body, thereby improving the convenience of opening and closing the valve body. The regulating component is installed on the handle and is close to the low-pressure chamber.

[0013] Furthermore, the adjustment component includes:

[0014] An adjusting member, movably connected to the handle;

[0015] An adjusting handle, movably connected to the adjusting member;

[0016] Wherein, the regulating member is provided with an abutment portion corresponding to the valve body.

[0017] The adjusting member is hinged on the handle, and the adjusting handle is movably connected to the adjusting member. When the valve body needs to be opened, the adjusting member is rotated by pushing the adjusting handle, so that the abutting part abuts against the valve body, and the valve body is pushed to move, thereby realizing that the valve body opens the connecting channel.

[0018] Furthermore, the adjusting member is provided with a limiting portion, and the adjusting handle is provided with a limiting groove adapted to the limiting portion.

[0019] The limiting part and the limiting groove enable the adjusting member and the adjusting handle to move relative to each other, thereby increasing the lever arm when the adjusting handle is pushed, making it easier to adjust the adjusting assembly. The limiting part and the limiting groove ensure that the adjusting member and the adjusting handle are always connected, thereby ensuring the stability of the adjusting assembly.

[0020] Furthermore, the adjusting handle is provided with an inserting portion, and the handle is provided with an inserting groove adapted to the inserting portion.

[0021] When the adjustment component has completed the adjustment, the plug-in portion of the adjustment handle is plugged into the plug-in slot so that the adjustment component cannot rotate, thereby ensuring that the adjustment component does not affect normal use when the wrench is in use and improving the stability of the wrench when in use.

[0022] Furthermore, the adjustment handle is provided with a buckle portion, and the handle is provided with a buckle groove adapted to the buckle portion.

[0023] When the plug-in portion on the adjusting handle is plugged into the plug-in slot, the buckle portion cooperates with the buckle slot, so that the adjusting handle can be fixed on the handle, further improving the stability of the adjusting assembly when not in use.

[0024] Furthermore, the telescopic assembly is provided with a sealing ring corresponding to the handle rod.

[0025] The sealing ring improves the sealing performance between the telescopic cavity and the handle rod to prevent the high-pressure gas in the high-pressure chamber from leaking when the handle rod is telescoped.

[0026] Furthermore, the handle rod is provided with a scale.

[0027] The scale makes it easy to observe the length of the stem extending from the handle, making the overall length of the wrench more intuitive.

[0028] The beneficial effects of this application are:

[0029] 1. When the overall length of the wrench needs to be adjusted, it is adjusted through the telescopic component and the connecting channel is opened through the valve body.

[0030] 2. When the handle and the handle are in a free state and are not affected by external forces, the interaction of the air pressure in the high-pressure chamber and the low-pressure chamber causes the piston to move in the telescopic chamber, and the handle extends from the telescopic chamber, thereby lengthening the overall length of the wrench.

[0031] 3. When the handle and the handle are under the action of external force, the handle and the handle are brought close to each other, so that the piston moves in the telescopic cavity, and the handle contracts into the telescopic cavity, so that the overall length of the wrench becomes shorter. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the wrench of the present application;

[0033] Figure 2 This is a schematic diagram of the structure of the telescopic assembly of the present application;

[0034] Figure 3 This is a schematic diagram of the structure of the regulating component of the present application;

[0035] Figure 4 This is a schematic cross-sectional view of the handle of the present application;

[0036] The reference numerals in the figure are: 100, wrench head; 200, handle; 210, scale; 300, handle; 310, plug-in slot; 320, snap-on slot; 400, telescopic assembly; 410, telescopic cavity; 411, high-pressure chamber; 412, low-pressure chamber; 420, piston; 430, valve body; 431, first spring; 440, connecting channel; 450, sealing ring; 500, adjusting assembly; 510, adjusting member; 511, limiting portion; 520, adjusting handle; 521, limiting slot; 522, plug-in portion; 523, snap-on portion; 530, abutting portion. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0038] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0039] The following provides a detailed description of the embodiments of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0040] Embodiment 1:

[0041] like Figure 1 , Figure 2 As shown, an embodiment of the present application provides a length-adjustable wrench, comprising:

[0042] Wrench head 100;

[0043] The handle 200 is installed and connected with the wrench head 100;

[0044] A handle 300 connected to the handle bar 200;

[0045] The telescopic assembly 400 is disposed in the handle 300 , and the telescopic assembly 400 includes a telescopic chamber 410 , a piston 420 , and a valve body 430 ;

[0046] Among them, the piston 420 is placed in the telescopic chamber 410, and the piston 420 divides the telescopic chamber 410 into a high-pressure chamber 411 and a low-pressure chamber 412. The handle rod 200 extends into the telescopic chamber 410 and is connected to the piston 420. The telescopic chamber 410 is provided with a connecting channel 440, and the connecting channel 440 is connected between the high-pressure chamber 411 and the low-pressure chamber 412. The connection and disconnection of the connecting channel 440 is controlled by the valve body 430, and the valve body 430 is provided with a first spring 431.

[0047] The wrench head 100 is used to tighten fasteners such as bolts and nuts. The handle rod 200 is rigidly connected to the wrench head 100. When the overall length of the wrench needs to be adjusted, it is adjusted through the telescopic assembly 400, and the connecting channel 440 is opened through the valve body 430. When the handle rod 200 and the handle 300 are in a free state and are not subject to external force, under the interaction of the air pressure in the high-pressure chamber 411 and the low-pressure chamber 412, the piston 420 is placed in the telescopic chamber 410 and moves, and the handle rod 200 extends from the telescopic chamber 410, so that the overall length of the wrench is lengthened. When the handle rod 200 and the handle 300 are under the action of external force, the handle rod 200 and the handle 300 are close to each other, so that the piston 420 moves in the telescopic chamber 410, and the handle rod 200 contracts into the telescopic chamber 410, so that the overall length of the wrench is shortened. After the adjustment is completed, the connecting channel 440 is closed again through the valve body 430.

[0048] Embodiment 2:

[0049] like Figure 2 , Figure 3 , Figure 4 As shown, an embodiment of the present application provides a length adjustment wrench. In addition to the above-mentioned technical features, the handle 300 is further provided with an adjustment assembly 500 corresponding to the valve body 430.

[0050] The regulating assembly 500 is used to control the opening and closing of the valve body 430 , thereby improving the convenience of opening and closing the valve body 430 . The regulating assembly 500 is installed on the handle 300 and is close to the low-pressure chamber 412 .

[0051] Furthermore, the adjustment component 500 includes:

[0052] An adjusting member 510 movably connected to the handle 300;

[0053] The adjusting handle 520 is movably connected to the adjusting member 510;

[0054] The regulating member 510 is provided with an abutting portion 530 corresponding to the valve body 430 .

[0055] The adjusting member 510 is hinged on the handle 300 , and the adjusting handle 520 is movably connected to the adjusting member 510 . When the valve body 430 needs to be opened, the adjusting handle 520 is pushed to rotate the adjusting member 510 , so that the abutting portion 530 abuts against the valve body 430 , and the valve body 430 is pushed to move, thereby enabling the valve body 430 to open the connecting channel 440 .

[0056] Embodiment 3:

[0057] like Figure 4As shown, an embodiment of the present application provides a length adjustment wrench. In addition to the above-mentioned technical features, further, the adjusting member 510 is provided with a limiting portion 511, and the adjusting handle 520 is provided with a limiting groove 521 adapted to the limiting portion 511.

[0058] The limiting portion 511 and the limiting groove 521 enable the adjusting member 510 and the adjusting handle 520 to move relative to each other, thereby increasing the lever arm when the adjusting handle 520 is pushed, making it easier to adjust the adjusting assembly 500. The limiting portion 511 and the limiting groove 521 ensure that the adjusting member 510 and the adjusting handle 520 are always connected, thereby ensuring the stability of the adjusting assembly 500.

[0059] Embodiment 4:

[0060] like Figure 4 As shown, an embodiment of the present application provides a length adjustment wrench. In addition to the above-mentioned technical features, further, the adjustment handle 520 is provided with a plug-in portion 522 , and the handle 300 is provided with a plug-in slot 310 adapted to the plug-in portion 522 .

[0061] When the adjustment component 500 completes the adjustment, the plug-in portion 522 of the adjustment handle 520 is plugged into the plug-in slot 310 to prevent the adjustment component 500 from rotating, thereby ensuring that the adjustment component 500 does not affect normal use when the wrench is in use, thereby improving the stability of the wrench when in use.

[0062] Embodiment 5:

[0063] like Figure 4 As shown, an embodiment of the present application provides a length adjustment wrench. In addition to the above-mentioned technical features, further, the adjustment handle 520 is provided with a buckle portion 523, and the handle 300 is provided with a buckle groove 320 adapted to the buckle portion 523.

[0064] When the inserting portion 522 on the adjusting handle 520 is inserted into the inserting slot 310 , the buckle portion 523 cooperates with the buckle slot 320 , so that the adjusting handle 520 can be fixed on the handle 300 , further improving the stability of the adjusting assembly 500 when not in use.

[0065] Embodiment 6:

[0066] like Figure 2 As shown, an embodiment of the present application provides a length-adjustable wrench. In addition to the above-mentioned technical features, the telescopic assembly 400 is further provided with a sealing ring 450 corresponding to the handle rod 200 .

[0067] The sealing ring 450 improves the sealing performance between the telescopic chamber 410 and the handle rod 200 to prevent the high-pressure gas in the high-pressure chamber 411 from leaking when the handle rod 200 is telescoped.

[0068] Embodiment 7:

[0069] like Figure 1 As shown, an embodiment of the present application provides a length-adjustable wrench. In addition to the above-mentioned technical features, the handle rod 200 is further provided with a scale 210 .

[0070] The scale 210 makes it easy to observe the length of the stem 200 extending from the handle 300, so that the overall length of the wrench is more intuitive.

[0071] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A length-adjustable wrench, characterized in that: include: Wrench head (100); A handle rod (200) is mounted and connected to the wrench head (100); A handle (300) connected to the handle (200); A telescopic assembly (400) is disposed in the handle (300), wherein the telescopic assembly (400) comprises a telescopic chamber (410), a piston (420), and a valve body (430); The piston (420) is placed in the telescopic chamber (410), and the piston (420) divides the telescopic chamber (410) into a high-pressure chamber (411) and a low-pressure chamber (412). The handle rod (200) extends into the telescopic chamber (410) and is connected to the piston (420). The telescopic chamber (410) is provided with a connecting channel (440), and the connecting channel (440) is connected between the high-pressure chamber (411) and the low-pressure chamber (412). The opening and closing of the connecting channel (440) is controlled by a valve body (430), and the valve body (430) is provided with a first spring (431).

2. The length-adjustable wrench according to claim 1, characterized in that: The handle (300) is provided with an adjustment assembly (500) corresponding to the valve body (430).

3. The length-adjustable wrench according to claim 2, characterized in that: The adjustment component (500) comprises: An adjusting member (510) movably connected to the handle (300); An adjusting handle (520) movably connected to the adjusting member (510); Wherein, the regulating member (510) is provided with an abutment portion (530) corresponding to the valve body (430).

4. The length-adjustable wrench according to claim 3, characterized in that: The adjusting member (510) is provided with a limiting portion (511), and the adjusting handle (520) is provided with a limiting groove (521) adapted to the limiting portion (511).

5. The length-adjustable wrench according to claim 3, characterized in that: The adjusting handle (520) is provided with an inserting portion 5 (22), and the handle (300) is provided with an inserting groove (310) adapted to the inserting portion (522).

6. The length-adjustable wrench according to claim 5, characterized in that: The adjusting handle (520) is provided with a buckle portion (523), and the handle (300) is provided with a buckle groove (320) adapted to the buckle portion (523).

7. The length-adjustable wrench according to claim 1, characterized in that: The telescopic assembly (400) is provided with a sealing ring (450) corresponding to the handle rod (200).

8. The length-adjustable wrench according to claim 1, characterized in that: The handle (200) is provided with a scale (210).

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