A half-round wrench which is easy to use
The adjustable and anti-slip design solves the problems of compatibility and labor-saving of the half-round wrench, enabling stable operation and comfortable grip on different parts, thus improving ease of use and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LANGFANG BEST TOOL MFG CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-02
AI Technical Summary
The existing half-round wrench has a fixed size, which cannot be adapted to parts of different specifications. It is also difficult to save effort when large torque is required, which may lead to difficulty in operation or damage to the wrench.
An adjustable mechanism was designed, including a semi-ring fixing component, an extension rod, and an anti-slip mechanism. The lever arm can be increased or shortened by the adjustable mechanism, and the fixed bolts are used for fixing. The cooperation between the extension rod and the limiting component ensures stability. The anti-slip mechanism improves grip comfort and friction through a silicone protective sleeve and a magnesium powder bag.
It achieves stable operation and labor-saving effect on components of different specifications, enhances flexibility in narrow spaces, improves grip stability and comfort, and reduces operator fatigue.
Smart Images

Figure CN224310523U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of semi-circular wrench technology, and in particular to a semi-circular wrench that is easy to use. Background Technology
[0002] Half-circle wrenches are mainly used for disassembling and tightening round or semi-circular parts of specific specifications. They are semi-circular in shape and are usually made of high-strength metal materials, with good toughness and wear resistance. They can be adapted to round objects such as bucket lids and valves of corresponding sizes. They are often used in industries such as chemical and food processing to open or close large-diameter containers or to tighten round nuts and pipe fittings of specific specifications. In addition, half-circle wrenches can also be used to operate parts with suitable shapes in mechanical maintenance and pipeline installation.
[0003] In the existing technology, common semi-circular wrenches have fixed sizes and can only be adapted to semi-circular parts of specific specifications. Ordinary semi-circular wrenches have fixed lever arms, and when large torque is required, it is impossible to save effort by increasing the lever arm. This may make it difficult for the operator to turn the parts, or even damage the wrench or the parts. Therefore, we propose a semi-circular wrench that is easy to use. Utility Model Content
[0004] The purpose of this invention is to provide an easy-to-use half-circular wrench to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a user-friendly semi-circular wrench, comprising an adjustable mechanism and an anti-slip mechanism disposed on its outer side, wherein the adjustable mechanism includes a semi-ring fixing member, and protrusions are fixedly installed on the inner walls of both ends of the semi-ring of the semi-ring fixing member; the semi-ring fixing member is connected to a first handle via a connector; the first handle is connected to a second handle via an extension rod; and both the first handle and the second handle are connected to a limiting bolt via a limiting member and a limiting screw hole.
[0006] As a preferred embodiment, the connector is fixedly installed at the bottom of the semi-ring fastener, the upper end of the first handle is inserted into the inside of the connector, and a threaded hole is passed through the overlapping part of the connector and the first handle, and a fastening bolt is threaded into the inside of the threaded hole.
[0007] As a preferred embodiment, one end of the extension rod is slidably connected to the inside of the first handle, and the surface of the extension rod is provided with serrated grooves.
[0008] As a preferred embodiment, the second handle is slidably connected to the outer wall of the other end of the extension rod, and a limiting component is fixedly installed on the surface of the first handle and the second handle that are close to each other. The limiting screw hole penetrates the surface of the limiting component, and the lower end of the limiting screw hole extends to the surface of the extension rod. The limiting bolt is threadedly connected to the inside of the limiting screw hole.
[0009] As a preferred embodiment, the anti-slip mechanism includes a silicone protective sleeve, which is fitted onto the outer wall of the second handle. A thumb sleeve is fixedly installed on one side of the outer wall of the silicone protective sleeve near the upper end, and a hand grip groove is provided on the other side of the outer wall of the silicone protective sleeve.
[0010] As a preferred embodiment, an elastic band is fixedly installed at the bottom of the silicone protective cover, a magnesium powder bag is fixedly installed at the lower end of the elastic band, and a sealing plug is inserted into the opening of the magnesium powder bag.
[0011] The technical effects and advantages of this utility model are as follows:
[0012] 1. Through the adjustable mechanism, the semi-circular fixing part and the protrusion block cooperate with each other to tightly lock the outer wall of the semi-circular part. Then, it is connected to the first handle by the fastening bolt to ensure a stable connection. When facing a large torque requirement, the extension rod can be extended to increase the lever arm, so that the part can be rotated more easily and effortlessly. When working in a narrow space, the extension rod can be shortened for convenient and flexible operation. At the same time, the limit bolt can effectively fix the extension rod to prevent it from sliding or shifting during operation, providing a reliable stability guarantee for the entire operation process.
[0013] 2. The anti-slip mechanism allows the soft silicone protective sleeve to easily fit over the semi-circular wrench handle, providing both anti-slip and cushioning. Before use, open the sealed plug, remove the built-in magnesium powder bag, and apply the magnesium powder to your hands. This quickly absorbs sweat, keeping your palms dry and significantly increasing the friction between your palm and the wrench, ensuring a stable grip. In addition, the hand grip groove and thumb sleeve on the wrench handle are ergonomically designed, allowing your hand to fit naturally during use, reducing fatigue and improving comfort and convenience during operation. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a partial structural schematic diagram of the adjustable mechanism of this utility model;
[0016] Figure 3 This is an exploded view of part of the adjustable mechanism of this utility model;
[0017] Figure 4 This is a three-dimensional structural diagram of the anti-slip mechanism of this utility model.
[0018] In the diagram: 1. Adjustable mechanism; 101. Semi-ring fixing part; 102. Protrusion block; 103. Connector; 104. Fastening bolt; 105. First handle; 106. Threaded hole; 107. Extension rod; 108. Serrated groove; 109. Second handle; 110. Limiting screw hole; 111. Limiting part; 112. Limiting bolt; 2. Anti-slip mechanism; 201. Silicone protective cover; 202. Thumb sleeve; 203. Hand grip groove; 204. Elastic band; 205. Magnesium powder bag; 206. Sealing plug. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1
[0020] Please see the appendix Figure 1 - Appendix Figure 3 A user-friendly semi-circular wrench includes an adjustable mechanism 1 and an anti-slip mechanism 2 disposed on its outer side. The adjustable mechanism 1 includes a semi-ring fixing member 101. Both ends of the semi-ring of the fixing member 101 have protrusions 102 fixedly installed on their inner walls. The semi-ring fixing member 101 is connected to a first handle 105 via a connector 103. The first handle 105 is connected to a second handle 109 via an extension rod 107. Both the first handle 105 and the second handle 109 are connected to limit bolts 112 via limit members 111 and limit screw holes 110. The connector 103 is fixedly installed at the bottom of the semi-ring fixing member 101, and the upper end of the first handle 105 is inserted into the interior of the connector 103. A threaded hole 106 passes through the overlapping part of the connector 103 and the first handle 105. A fastening bolt 104 is threadedly connected inside the threaded hole 106. One end of the extension rod 107 is slidably connected inside the first handle 105. A serrated groove 108 is opened on the surface of the extension rod 107. The second handle 109 is slidably connected to the outer wall of the other end of the extension rod 107. A limiting member 111 is fixedly installed on the surface of the first handle 105 and the second handle 109 that are close to each other. A limiting screw hole 110 passes through the surface of the limiting member 111. The lower end of the limiting screw hole 110 extends to the surface of the extension rod 107. A limiting bolt 112 is threadedly connected inside the limiting screw hole 110.
[0021] The semi-ring fastener 101 is connected to the first handle 105 by a fastening bolt 104. Different sizes of semi-ring fasteners 101 can be replaced according to the size of the semi-circular parts that need to be disassembled and installed, thereby increasing the range of use. Half of the extension rod 107 is inside the first handle 105, and the other half is inside the second handle 109. The friction between the serrated groove 108 and the limiting bolt 112 is large, which makes the extension rod 107 stable and stationary.
[0022] Specifically, the semi-circular fixing member 101, together with the protrusion 102, is clamped onto the outer wall of the semi-circular component. The semi-circular fixing member 101 is connected to the first handle 105 by the fastening bolt 104. When a larger torque is required, the extension rod 107 can be extended to increase the lever arm, thereby making the operation more labor-saving. When working in a confined space, the extension rod 107 can be shortened for easy operation. The extension rod 107 is fixed with the limiting bolt 112 to ensure the stability of the operation. Example 2
[0023] Please see the appendix Figure 1 and attached Figure 4 Furthermore, based on Embodiment 1, the anti-slip mechanism 2 includes a silicone protective sleeve 201, which is fitted onto the outer wall of the second handle 109. A thumb sleeve 202 is fixedly installed on one side of the outer wall of the silicone protective sleeve 201 near the upper end. A hand grip groove 203 is provided on the other side of the outer wall of the silicone protective sleeve 201. An elastic band 204 is fixedly installed at the bottom of the silicone protective sleeve 201. A magnesium powder bag 205 is fixedly installed at the lower end of the elastic band 204. A sealing plug 206 is inserted into the opening of the magnesium powder bag 205.
[0024] Firstly, the silicone protective sleeve 201 can deform moderately under force, expanding or contracting to adapt to handles of different diameters. The thumb sleeve 202 and the hand grip groove 203 allow the user's hand to fit the handle of the semi-circular wrench, improving comfort and anti-slip properties. The magnesium powder in the magnesium powder bag 205 can be stored, eliminating the need to search for it when using it.
[0025] Specifically, the silicone protective cover 201 can be put on the handle of the half-round wrench. Before use, the sealing plug 206 can be opened and the magnesium powder in the magnesium powder bag 205 can be applied to the hands. It can quickly absorb the sweat on the hands and keep the palms dry, thereby increasing the friction between the palm and the half-round wrench. At the same time, when using it, the hand can fit in the handle groove 203 and thumb sleeve 202 to ensure hand comfort.
[0026] The working principle of this utility model is as follows: This utility model is a convenient semi-circular wrench. First, select a suitable semi-circular fixing part 101 according to the size of the semi-circular part to be operated, and connect it to the connecting part 103 with the fastening bolt 104. Then, put the silicone protective sleeve 201 on the outer wall of the second handle 109. According to the user's needs, operate the extension rod 107. When it is necessary to extend the length of the entire handle, loosen the two sets of limiting bolts 112. Then, pull the extension rod 107 out from the first handle 105 and the second handle 109 to the required length. Then, tighten the two sets of limiting bolts 112 so that it tightly abuts against the surface of the serrated groove 108. Then, it can be operated. Open the sealing plug 206, apply the magnesium powder inside the magnesium powder bag 205 to your hand, and then hold the silicone protective sleeve 201 with your thumb inserted into the thumb sleeve 202 and the other fingers placed on the hand grip groove 203 to install or disassemble the semi-circular part.
[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. A user-friendly half-circle wrench, comprising an adjustable mechanism (1) and an anti-slip mechanism (2) disposed on its outer side, characterized in that: The adjustable mechanism (1) includes a semi-ring fixing member (101). The inner walls of both ends of the semi-ring of the semi-ring fixing member (101) are fixedly installed with protrusions (102). The semi-ring fixing member (101) is connected to a first handle (105) through a connector (103). The first handle (105) is connected to a second handle (109) through an extension rod (107). The first handle (105) and the second handle (109) are both connected to a limiting bolt (112) through a limiting member (111) and a limiting screw hole (110).
2. The easy-to-use semi-circular wrench according to claim 1, characterized in that: The connector (103) is fixedly installed at the bottom of the semi-ring fastener (101). The upper end of the first handle (105) is inserted into the inside of the connector (103). A threaded hole (106) is passed through the overlapping part of the connector (103) and the first handle (105). A fastening bolt (104) is threaded inside the threaded hole (106).
3. The easy-to-use semi-circular wrench according to claim 2, characterized in that: One end of the extension rod (107) is slidably connected to the inside of the first handle (105), and the surface of the extension rod (107) is provided with a serrated groove (108).
4. The easy-to-use half-circular wrench according to claim 3, characterized in that: The second handle (109) is slidably connected to the outer wall of the other end of the extension rod (107). The first handle (105) and the second handle (109) are both fixedly installed with a limiting member (111) on their adjacent surfaces. The limiting screw hole (110) penetrates the surface of the limiting member (111), and the lower end of the limiting screw hole (110) extends to the surface of the extension rod (107). The limiting bolt (112) is threaded into the inside of the limiting screw hole (110).
5. A user-friendly half-circular wrench according to claim 1, characterized in that: The anti-slip mechanism (2) includes a silicone protective sleeve (201), which is fitted onto the outer wall of the second handle (109). A thumb sleeve (202) is fixedly installed on one side of the outer wall of the silicone protective sleeve (201) near the upper end, and a hand slot (203) is provided on the other side of the outer wall of the silicone protective sleeve (201).
6. A user-friendly half-circular wrench according to claim 5, characterized in that: An elastic band (204) is fixedly installed at the bottom of the silicone protective cover (201), and a magnesium powder bag (205) is fixedly installed at the lower end of the elastic band (204). A sealing plug (206) is inserted into the opening of the magnesium powder bag (205).