Connection structure between handle and tool head

Abstract

A connecting structure between a handle and a tool head, comprising a handle and a tool head, characterized in that the handle includes a plug-in section and a handle part, wherein a receiving hole is formed in the center of the tool head; the plug-in section is inserted into the receiving hole, wherein the end face of the plug-in section is flush with the end face of the tool head; a keyway is formed in the center of the plug-in section; a wedge element is inserted in the keyway; a screw is inserted through the center of the wedge element; the screw is connected to the handle and fixes the wedge element in the keyway; wherein the wedge element has a conical chamfer on its outer surface which, when driven into the keyway, expands the plug-in section radially outwards so that it sits firmly in the receiving hole of the tool head.

Description

Technical area

[0001] The present utility model relates to the technical field of hardware tools and in particular to a connection structure between the handle and the tool head. State of the art

[0002] Hand tools such as axes and hammers are generally designed so that the tool head is attached to the handle and secured by fasteners or stops. However, during use, the tool head experiences an upward force due to the impact. This causes the tool head to loosen between the handle and the tool head, impairing its proper function. Therefore, a universally applicable tool was designed to reduce the likelihood of the tool head loosening. Content of the utility model

[0003] The purpose of this utility model is to provide a connection structure between the handle and the tool head. By mounting a wedge element using a screw, the outer wall of the handle is widened. This increases the pressure between the outer wall of the handle and the inner wall of the tool head, improves the connection strength between the handle and the tool head, reduces the effect of the counterforce on the tool head during operation, and lowers the likelihood of the tool head loosening.

[0004] The present utility model provides the following technical solution: A connecting structure between the handle and the tool head comprises a handle and a tool head. The handle comprises a plug-in section and a handle part, wherein a receiving hole is formed in the center of the tool head; the plug-in section is inserted into the receiving hole, the end face of the plug-in section being flush with the end face of the tool head; a keyway is formed in the center of the plug-in section; a wedge element is inserted in the keyway; a screw is inserted through the center of the wedge element; the screw is connected to the handle and secures the wedge element in the keyway; wherein the wedge element has a conical chamfer on its outer surface which, when driven into the keyway, expands the plug-in section radially outwards so that it sits firmly in the receiving hole of the tool head.

[0005] In one embodiment, the outer surface of the wedge element is conical in the vertical direction. A through-hole is formed in the center of the wedge element, which serves for mounting the screw.

[0006] In one embodiment, a conical chamfer is formed on the upper outer surface of the wedge element. The lower surface of the wedge element is a vertical plane. A through-hole is formed in the center of the wedge element, serving for mounting the screw.

[0007] Furthermore, the protruding features on the side surfaces of the wedge element extend outwards.

[0008] In one embodiment, the shape of the wedge element is circular, elliptical, axe-shaped, square or teardrop-shaped.

[0009] In one embodiment, a nut is arranged inside the handle and screwed to the bolt. A through-hole is formed in the bottom of the keyway. The nut is positioned in this through-hole. The nut secures the bolt, thus simplifying the bolt connection.

[0010] In one embodiment, a threaded hole is formed in the center of the handle. The screw is screwed into the threaded hole.

[0011] Furthermore, a cavity is formed at the base of the handle. This cavity makes the inside of the handle hollow, reducing its weight and simultaneously improving its damping properties.

[0012] In one embodiment, a nut is arranged in the cavity, which is screwed to the screw.

[0013] Furthermore, the tool head can be a hammer head, an axe head, or a hoe head, thus expanding the tool's range of applications. Preferably, the handle is injection-molded from nylon, and the nut is embedded in the handle during the injection molding process, further improving the handle's damping properties.

[0014] Compared to the prior art, the present utility model exhibits the following advantageous effects: The installation of the screw fixes the wedge element in the handle, thereby widening the outer wall of the handle. This increases the pressure between the outer wall of the handle and the inner wall of the tool head, improves the connection strength between the handle and the tool head, reduces the effect of the counterforce on the tool head during operation, and decreases the likelihood of the tool head loosening. Description of the attached drawings

[0015] The drawings serve to further illustrate the present utility model and form part of the description. Together with the embodiments of the present utility model, they serve to explain the present utility model and do not constitute a limitation of the present utility model. The drawings contain: Fig. Figure 1 is a cross-sectional view of the overall structure of the present utility model; Fig. Figure 2 is a top view of the present utility model; Fig. Figure 3 is a structural view of the handle of the present utility model; Fig. Figure 4 is a sectional view of the wedge element of the present utility model; Fig. Figure 5 is a perspective view of the wedge element of the present utility model; Fig. Figure 6 is a structural view of the overall structure of the second embodiment of the present utility model; Fig. Figure 7 is a structural view of the overall structure of the third embodiment of the present utility model; Fig. Figure 8 is a structural view of the fourth embodiment of the wedge element of the present utility model; Fig. Figure 9 is a structural view of an embodiment of the wedge element of the present utility model; Fig. Figure 10 is a structural view of an embodiment of the wedge element of the present utility model; Fig. Figure 11 is a structural view of an embodiment of the wedge element of the present utility model.

[0016] In the drawings: 1-Handle; 11-Plug section; 12-Handle part; 13-Keyway; 14-Cavity; 2-Tool head; 21-Receiving hole; 22-Threaded hole; 3-Nut; 4-Key element; 41-Raise; 42-Bevel; 5-Screw. Examples of implementation

[0017] The technical solution in the embodiments of this utility model is described clearly and completely below with reference to the accompanying drawings. It is understood that the described embodiments represent only a portion of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all further embodiments that are accessible to a person skilled in the art without inventive step fall within the scope of protection of this utility model. Example 1

[0018] With reference to Fig. 1 and Fig. Section 2 of the present utility model provides a technical solution: a connection structure between a handle and a tool head, comprising a handle 1 and a tool head 2. The handle 1 includes a plug-in section 11 and a handle part 12, the diameter of the plug-in section 11 being smaller than the diameter of the handle part 12. A receiving hole 21 is formed in the center of the tool head 2, and the plug-in section 11 is inserted into the receiving hole 21, so that the tool head 2 is mounted on the plug-in section 11. A keyway 13 is formed in the center of the plug-in section 11, and a wedge element 4 is inserted into the keyway 13. The dimensions of the keyway 13 are smaller than the dimensions of the wedge element 4, so that after assembly, the wedge element 4 widens the inner wall of the keyway 13.

[0019] A screw 5 is located in the center of the wedge element 4. This screw is connected to the handle 1 and secures the wedge element 4 in the keyway 13. A chamfer 42 is formed on the outer surface of the wedge element 4 to widen the handle 1. After the wedge element 4 is installed in the keyway 13, its end face is flush with the end face of the handle 1. The installation of the wedge element 4 widens the handle 1, pressing the outer wall of the insertion section 11 against the inner wall of the receiving hole 21. This increases the pressure between the handle 1 and the tool head 2, preventing any loosening between the tool head 2 and the handle 1 that would impair the proper use of the tool.In contrast to the conventional design where the hammer head is fixed to the end face of the handle by means of a screw, in this design the pressing force between the handle 1 and the tool head 2 is located between the side faces of the two components. The widening of the handle 1 increases the strength of the connection between the handle 1 and the tool head 2, and reduces the effect of the upward counterforce during striking on the connection between the handle 1 and the tool head 2, thus preventing the tool head 2 from easily loosening or falling off.

[0020] As in Fig. 4 and Fig. As shown in Figure 5, the wedge element 4 in this embodiment is elliptically shaped overall. A conical chamfer is formed on the upper outer surface of the wedge element 4, the upper conical chamfer serving to widen the handle 1, and the lower surface is a vertical surface. Outwardly projecting protrusions 41 are formed on both sides of the wedge element 4, which serve to increase the contact area between the wedge element 4 and the handle 1 and prevent the wedge element 4 from rotating in the wedge groove 13. A through hole is formed in the center of the wedge element 4, which serves for mounting the screw 5, and a countersunk hole is formed on the upper surface of the wedge element 4, in which the head of the screw 5 is accommodated.

[0021] As in Fig. As shown in Figure 3, a nut 3 is arranged inside the handle 1. The nut 3 is hexagonal and is screwed to the screw 5. A through-hole is formed in the bottom of the keyway 13, and the nut 3 is positioned in this through-hole in the handle 1. The screw 5 is inserted sequentially through the wedge element 4 and the handle 1, securing the wedge element 4 in the keyway 13. Preferably, the nut 3 can also be of a different special shape.

[0022] A cavity 14 is formed at the base of the handle 1, which serves to reduce the weight of the handle 1. At the same time, the hollow handle 1 can absorb some of the vibrations transmitted from the tool head 2 and thus achieve a damping effect.

[0023] The tool head 2 is a hammer head, axe head, or hoe head, thus expanding the tool's range of applications and allowing various types of tool heads 2 to be attached to the handle. Preferably, the handle 1 is injection-molded from nylon. The nylon material further improves the vibration-damping properties of the handle 1 and increases user comfort. The nut 3 is embedded in the handle 1 during the injection molding process. Alternatively, the handle 1 can also be made of glass-fiber-reinforced nylon or a thermoplastic elastomer such as polypropylene. Example 2

[0024] As in Fig. As shown in Figure 6, the construction of this embodiment is otherwise identical to that of embodiment 1. The difference lies in the fact that a threaded hole 22 is formed in the center of the handle 1, and the screw 5 is screwed into the threaded hole 22. The screw connection between the screw 5 and the threaded hole 22 secures the wedge element 4 in the wedge groove 13. Example 3

[0025] As in Fig. As shown in Figure 7, the construction of this embodiment is otherwise identical to that of embodiment 1. The difference lies in the fact that a nut 3 is arranged in the cavity 14, which is connected to the screw 5. The wedge element 4 is fixed in the keyway 13 by means of the screw 5. Example 4

[0026] As in Fig. As shown in Figure 8, the wedge element 4 in this embodiment is teardrop-shaped. The outer surface of the wedge element 4 is tapered in the vertical direction. A through-hole is formed in the center of the wedge element 4 for mounting the screw, and the surface of the wedge element 4 is smooth. As shown in Figure 8, the wedge element 4 is teardrop-shaped. Fig. 9, Fig. 10 and Fig. As shown in Figure 11, the wedge element 4 can preferably be elliptical, circular, axe-shaped, teardrop-shaped, or square. Differently shaped wedge elements 4 are used for different product types, ensuring that different types of tool heads 2 can be stably connected to the handle 1.

[0027] Finally, it should be noted that the preceding embodiments serve only to illustrate the present utility model and are not to be interpreted as limiting it. Although the present utility model has been described in detail with reference to the preceding embodiments, it is clear to a person skilled in the art that the technical solutions described in the preceding embodiments can be further modified or that individual technical features can be replaced by equivalent features. All modifications, equivalent replacements, and improvements that are in keeping with the spirit and principles of the present utility model fall within the scope of protection of the present utility model.

Claims

[1] A connecting structure between the handle and the tool head, comprising a handle and a tool head, characterized by that the handle comprises a plug-in section and a handle part, wherein a receiving hole is formed in the center of the tool head; the plug-in section is inserted into the receiving hole, wherein the end face of the plug-in section is flush with the end face of the tool head; a keyway is formed in the center of the plug-in section; a wedge element is inserted in the keyway; a screw is inserted through the center of the wedge element; the screw is connected to the handle and secures the wedge element in the keyway; wherein the wedge element has a conical chamfer on its outer surface which, when driven into the keyway, expands the plug-in section radially outwards so that it sits firmly in the receiving hole of the tool head. [2] The connection structure between handle and tool head according to claim 1, characterized by, that the outer surface of the wedge element is conical in the vertical direction; a through hole is formed in the middle of the wedge element, the through hole serving for mounting the screw. [3] The connection structure between handle and tool head according to claim 1, characterized by , that a conical slope is formed on the upper outer surface of the wedge element; the lower surface of the wedge element is a vertical surface; a through hole is formed in the middle of the wedge element, the through hole serving for mounting the screw. [4] The connection structure between the handle and the tool head according to one of claims 2 or 3, characterized by , that the protruding features on the side surfaces of the wedge element are formed facing outwards. [5] The connection structure between the handle and the tool head according to one of claims 2 or 3, characterized bythat the shape of the wedge element is circular, elliptical, axe-shaped, square or teardrop-shaped. [6] The connection structure between the handle and the tool head according to claim 5, characterized by , that a nut is arranged inside the handle, which is screwed to the screw; a through hole is formed on the bottom of the keyway; the nut is arranged in the through hole. [7] The connection structure between the handle and the tool head according to claim 5, characterized by , that a threaded hole is formed in the middle of the handle; the screw is screwed into the threaded hole. [8] The connection structure between handle and tool head according to claim 1, characterized by that a cavity is formed at the bottom of the handle. [9] The connection structure between the handle and the tool head according to claim 8, characterized by that a nut is arranged in the cavity, which is screwed to the bolt. [10] The connection structure between the handle and the tool head according to claim 1, characterized by that the tool head is a hammer head, an axe head, or a hoe head.

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