Environment-friendly hand tool with metal reinforcing assembly
By using a composite structure of metal reinforcement components and a thermoplastic material layer in the tool handle of the hand tool, the existing hand tools have broken handles and environmental pollution problems, and the firm connection between the tool head and the tool handle and environmental protection requirements are achieved.
Patent Information
- Application Number
- CN202420276992.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-05
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-02-05
AI Technical Summary
The existing manual tools have problems such that the tool head may fall off or the tool shank is broken, which brings safety risks. At the same time, the existing reinforced tool shank uses fiberglass materials, which has problems such as environmental pollution and non-renewable.
A manual tool with metal reinforcement components was designed. The tool handle was made of composite materials, including a composite structure of metal reinforcement plate and thermoplastic material layer. Through the cooperation of wedges and arc grooves, the tool handle and tool head are achieved. Connect to avoid the risk of breaking the handle.
The firm connection between the tool head and the tool handle is achieved, safety is improved, and the risk of breaking the handle is avoided. At the same time, environmentally friendly materials are used to reduce environmental pollution.
Smart Images
Figure CN222450171U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hand tool, in particular to an environmentally friendly hand tool with a metal reinforcement component. The tool head and the tool handle of the hand tool are firmly combined, and the tool handle has a reinforcement part, so that the tool handle has high strength, has no risk of handle breakage, is safe and environmentally friendly. Background Art
[0002] Existing hand tools generally include a tool head and a tool handle connected to the tool head. Tool heads mainly include axes, hammers, hoes, etc. The tool handle is generally made of engineering plastics, metal or wood. The front end of the metal handle or wooden handle has an assembly part, which directly cooperates with the assembly hole set on the tool head to realize the connection between the tool head and the tool handle. The plastic handle generally connects the tool handle to the tool head through an injection molding process. Regardless of which of the above handles, there is a problem that the tool head may fall off, or the tool handle may break due to insufficient strength, which brings safety hazards.
[0003] Existing reinforced tool handles are generally made of engineering plastics reinforced with glass fiber core rods. After the tool handle reinforced with glass fiber core rods is assembled with the tool head, the assembly should be sealed with sealant and then filled with epoxy resin, which is easy to fall off. In addition, during the production process of glass fiber materials, harmful gases, glass fiber dust and waste fibers will be generated. These waste fibers are usually buried deep in the land, but this method will cause serious pollution to the land. Although glass fiber is non-toxic, it basically will not degrade in the natural environment and will cause long-term harm to the environment. Since the glass fiber core rod is a thermosetting plastic, it cannot be recycled. In addition, the tool handle reinforced with glass fiber core rods can only be made into a straight handle, which is not ergonomic and uncomfortable to use. From the perspective of force, its static balance point should be at the junction of the tool head and the tool handle. The glass fiber reinforced tool handle is heavy and is not conducive to the dynamic balance of hand tools.
[0004] This technical field still requires the use of safe, environmentally friendly hand tools. Utility Model Content
[0005] In view of the above problems existing in the prior art, the utility model designs a new hand tool, the tool head and the tool handle of the hand tool are reliably connected and highly safe, and the tool handle is made of environmentally friendly materials, has high strength, is ergonomic and comfortable to operate.
[0006] Specifically, the technical solution of the utility model is: a hand tool with a metal reinforcement component, comprising a tool head and a tool handle, characterized in that the tool handle is a composite tool handle, the metal reinforcement component is provided at the front end of the composite tool handle, the metal reinforcement component comprises a first metal reinforcement plate and a second metal reinforcement plate, the first metal reinforcement plate and the second metal reinforcement plate have a symmetrical shape and structure, each of the first metal reinforcement plate and the second metal reinforcement plate has a first part, a transition part and a second part connected to the first part through the transition part, at least one arc groove extending in the longitudinal direction is provided on the first part, after the first metal reinforcement plate and the second metal reinforcement plate are fixedly connected, the front parts of the two second parts form a gradually widening opening;
[0007] The manual tool further comprises a wedge-shaped piece, wherein the wedge-shaped piece is provided with arc-shaped protrusions respectively matched with the arc grooves;
[0008] When the front end of the composite tool handle is inserted into the mounting hole of the tool head, a portion of the front end of the composite tool handle passes over the tool head, the wedge is inserted into the opening, and the arc-shaped protrusions respectively cooperate with the arc grooves, and the continuous insertion of the wedge under the action of force increases the required opening, and the size of the portion of the front end of the composite tool handle that passes over the tool head is larger than the size of the mounting hole of the tool head.
[0009] In this application, if used, "front" and "rear" are relative to the length direction of the tool handle (i.e., the "longitudinal direction"). The "front" end refers to the left end of the tool handle (i.e., the left end of the drawing), and the "rear" end refers to the right end of the tool handle (i.e., the right end of the drawing). Those skilled in the art should understand that the above-mentioned direction definitions and other directional terms mentioned are only for the purpose of convenient description of the utility model, and are not intended to limit the utility model.
[0010] In one embodiment, the at least one circular arc groove extending in the longitudinal direction is two circular arc grooves extending in the longitudinal direction.
[0011] In one embodiment, a strength reducing hole is provided at the bottom of the arc groove of the first portion.
[0012] Preferably, a slit communicating with the strength reducing hole is further provided at the front end of the strength reducing hole, and the slit extends to the front end of the metal reinforcing plate.
[0013] Preferably, other strength reducing holes are provided at other positions on the first part except the arc groove.
[0014] In one embodiment, each of the first metal reinforcing plate and the second metal reinforcing plate is provided with at least one rivet hole, and when the first metal reinforcing plate and the second metal reinforcing plate are fixedly connected together, the rivet holes are respectively aligned, and the fixed connection is riveted through the rivet holes.
[0015] More specifically, the at least one rivet hole is three rivet holes.
[0016] In one embodiment, at least one through hole is respectively provided on each of the first metal reinforcing plate and the second metal reinforcing plate, and when the first metal reinforcing plate and the second metal reinforcing plate are fixedly connected together, the through holes are respectively aligned.
[0017] Preferably, the at least one through hole is three through holes.
[0018] In one embodiment, a portion of the metal reinforcement component is composited within the first thermoplastic material layer. 。
[0019] Specifically, the front area of the first thermoplastic material layer includes a front portion, a middle portion and a rear portion, wherein the size of the longitudinal section of the middle portion gradually increases from front to rear, and the size of the rear portion is larger than the size of the mounting hole of the tool head.
[0020] Furthermore, a second thermoplastic material layer is compounded on a portion of the first thermoplastic material layer.
[0021] Furthermore, a third thermoplastic material layer is compounded on a portion of the second thermoplastic material layer.
[0022] Preferably, a lower bottom surface of the metal reinforcement component of the composite tool shank immediately behind the tool head is exposed.
[0023] The strength of the first thermoplastic material layer is greater than the strength of the second thermoplastic material layer and the strength of the third thermoplastic material layer, and the hardness of the first thermoplastic material layer is greater than the hardness of the second thermoplastic material layer, and the hardness of the second thermoplastic material layer is greater than the hardness of the third thermoplastic material layer.
[0024] In a specific embodiment, the first thermoplastic material layer is a nylon material layer, the second thermoplastic material layer is a polypropylene (PP) material layer, and the third thermoplastic material layer is a thermoplastic elastomer (TPE) layer.
[0025] The hand tool with a metal reinforcement component in the utility model can not only ensure a firm connection between the tool head and the tool handle, but also the metal reinforcement component can increase the strength of the tool handle after being compounded with thermoplastic material layers of different strengths and hardnesses. The first thermoplastic material layer can be used as a reinforcement core to further increase the strength of the tool handle, thereby reducing the risk of handle breakage and improving safety. The softer second thermoplastic material layer and the even softer third thermoplastic material layer can absorb vibrations during operation, making it more comfortable to use. The third thermoplastic material layer can also be provided with an anti-slip portion with a concave-convex structure at the hand-holding position to further improve the comfort and safety of use.
[0026] The utility model does not use thermosetting glass fiber as a reinforcing material, thereby meeting environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic structural diagram of a metal reinforcement plate in the metal reinforcement assembly of the utility model.
[0028] Figure 2 It is a top longitudinal cross-sectional schematic diagram of the metal reinforcement component of the present invention.
[0029] Figure 3 for Figure 2 Schematic diagram of the structure after the metal reinforcement component and the first thermoplastic material layer are composited.
[0030] Figure 4 for Figure 3 Schematic diagram of the structure after the composite body in is composited with the second thermoplastic material layer.
[0031] Figure 5 for Figure 4 Schematic diagram of the structure after the composite body is compounded with the third thermoplastic material layer and plugged into the tool axe.
[0032] Figure 6 To correspond to Figure 5 A three-dimensional schematic diagram of a manual axe with a metal reinforcement component of the utility model, wherein a wedge is inserted into the metal reinforcement component at the front end of a composite tool handle under the action of force.
[0033] Figure 7 It is a schematic diagram of the preferred structure of a metal reinforcement plate in the metal reinforcement assembly of the utility model. DETAILED DESCRIPTION
[0034] The utility model is further described below in conjunction with the accompanying drawings. It should be clear that the specific embodiments of the utility model described in the accompanying drawings are only for illustrating the utility model, and are not strictly drawn according to actual sizes and proportions. Therefore, the drawings in the utility model should not be interpreted as any limitation to the utility model. The embodiments listed in this application are only exemplary and do not limit the scope of protection of the utility model. The scope of protection of the utility model is defined by the claims.
[0035] It should be understood that the same or similar figure marks in the drawings represent the same or similar parts, and for the sake of simplicity, some figure marks in some drawings are omitted. When referring to the drawings, they should be cross-referenced with the specification and other drawings.
[0036] Reference Figure 1-6 . Figure 1 It is a schematic structural diagram of a metal reinforcement plate in the metal reinforcement assembly of the utility model. Figure 2 Schematic diagram of the top longitudinal section of the metal reinforcement component of the utility model. Figure 1 , Figure 2 As shown, the first metal reinforcement plate 100 has a first portion 10, a transition portion 20, and a second portion 30 connected to the first portion 10 through the transition portion 20. The transition portion 20 is designed so that the first portion 10 and the second portion 30 are not on the same plane. The transition portion 20 can be a smooth transition between the first portion 10 and the second portion 30.
[0037] The first metal reinforcing plate 100 is provided with two arc grooves 110 and 120 extending in the longitudinal direction on the first portion 10 thereof. In addition, the first metal reinforcing plate 100 is provided with three through holes 140 and three rivet holes 150. A strength reduction hole 101 is provided at the bottom of the arc groove 110, and a strength reduction hole 102 is provided at the bottom of the arc groove 120. More preferably, another strength reduction hole 103 is provided at other positions besides the arc grooves 110 and 120.
[0038] The second metal reinforcing plate 100' has a symmetrical shape and structure with the first metal reinforcing plate 100. Figure 2 As shown, for example, the second metal reinforcing plate 100' also has a first portion 10', a transition portion 20', and a second portion 30' connected to the first portion 10 through the transition portion 20', as well as a through hole 140' and a rivet hole (not shown). Figure 2 Although not marked, those skilled in the art will appreciate that the second metal reinforcement plate 100 ′ has other shapes and structures symmetrical to the first metal reinforcement plate 100 .
[0039] like Figure 2As shown, after being fixedly connected with the second metal reinforcing plate 100' through the rivet hole using the rivet 180, the through hole 140 and the through hole 140' are aligned, and the front of the first part 10 of the first metal reinforcing plate 100 and the front of the first part 10' of the second metal reinforcing plate 100' form a gradually widening opening 80.
[0040] The first metal reinforcement plate 100 and the second metal reinforcement plate 100 ′ are preferably made of steel material.
[0041] When manufacturing the tool handle of the utility model, firstly, a part of the metal reinforcement component is compounded in the first thermoplastic material layer. Figure 3 As shown, a portion of the metal reinforcement component is compounded into a first thermoplastic material layer formed of first thermoplastic materials 210, 220, 230, 250 by an injection molding process to form a composite body 200. In order to subsequently compound a second thermoplastic material layer, a step 240 is provided between the first thermoplastic materials 230 and 250. Figure 3 The dotted line in the figure represents the portion of the metal reinforcement component that has been compounded in the first thermoplastic material layer. The bottom surface 160 (160' (not shown)) of the metal reinforcement component is exposed, the purpose of which is to improve the strength and hardness of the metal reinforcement component and prevent the thermoplastic material from being damaged when the metal reinforcement component is fully encapsulated.
[0042] The front area of the first thermoplastic material layer includes a front portion 210, a middle portion 220 and a rear portion 230, wherein the outer dimensions of the longitudinal section of the middle portion 220 gradually increase from front to back, and the outer dimensions of the rear portion 230 are larger than the dimensions of the mounting hole of the tool head. This is done for the purpose of positioning and preventing the tool handle from sliding forward when the installation is completed.
[0043] Accordingly, the tool head (such as Figure 5 , 6 The mounting hole (not shown) of the axe in the middle is also processed into a shape and size corresponding to the front part 210 and the middle part 220.
[0044] The three aligned through holes 140 and through holes 140 ′ allow the first thermoplastic material to penetrate therethrough, which is beneficial for the composite of the first thermoplastic material and the metal reinforcement component.
[0045] The first thermoplastic material may be a high-strength nylon material, thereby serving as another tool handle reinforcement material.
[0046] Then, a second thermoplastic material layer is compounded on the first thermoplastic material 250 of the composite body 200. Figure 4As shown, the composite body 200 is compounded with the second thermoplastic material layer formed of the second thermoplastic material 310 and 330 by an injection molding process to form the composite body 300. In order to compound the third thermoplastic material layer subsequently, a step 320 is provided between the second thermoplastic materials 310 and 330. Figure 4 The dotted line in the figure represents the part that has been compounded in the second thermoplastic material layer. The second thermoplastic material can be made of a softer material, such as polypropylene (PP), to absorb the vibration generated during operation.
[0047] Then, a third thermoplastic material layer is compounded on the composite body 300. Figure 5 As shown, the composite body 300 is formed by compounding the third thermoplastic material layer 410 on the second thermoplastic material 330 through an injection molding process. The third thermoplastic material can be made of a softer material, such as a thermoplastic elastomer (TPE) material, to better absorb the vibration generated during operation. Since the third thermoplastic material layer 410 is usually located at the position where the operator holds the hand, a part of the third thermoplastic material layer 410 can be formed into a concave-convex structure 420 to achieve the purpose of anti-slip, thereby improving safety.
[0048] For better composite and aesthetic purposes, the third thermoplastic material layer 410 may cover only a portion of the second thermoplastic material 330, thereby leaving an exposed portion 430 formed by the second thermoplastic material. Figure 5 As shown, the exposed portion 430 may be manufactured in a diamond-shaped structure.
[0049] To facilitate hanging, a hanging hole 340 may be formed at the rear end of the tool handle.
[0050] like Figure 5 , 6 As shown, when the front end of the composite tool handle 400 with the metal reinforcement component is inserted into the mounting hole (not shown) of the axe 50, a portion of the front end of the composite tool handle passes over the axe 50, the wedge 60 is inserted into the opening 80, and the arc-shaped protrusions 610 and 620 of the wedge 60 respectively cooperate with the arc grooves 110 and 120. The continuous insertion of the wedge 60 under the action of force enlarges the opening 80, and the size of the portion of the front end of the composite tool handle 400 that passes over the axe 50 is larger than the size of the mounting hole of the axe 50, thereby locking the composite tool handle 400 on the axe 50.
[0051] The strength-reducing holes 101 , 102 , 103 facilitate deformation of the metal reinforcement component when the wedge 60 is inserted under force to lock the composite tool handle 400 onto the axe head 50 .
[0052] Figure 7 A preferred embodiment of the utility model is shown. Different from the above-mentioned embodiment, Figure 7As shown, for the first metal reinforcement plate 100, a slit 1011 connected to the strength reduction hole 101 is also opened at the front end of the strength reduction hole 101, and the slit 1011 extends to the front end of the first metal reinforcement plate 100; a slit 1021 connected to the strength reduction hole 102 is also opened at the front end of the strength reduction hole 102, and the slit 1021 extends to the front end of the first metal reinforcement plate 100.
[0053] The second metal reinforcing plate 100 ′ also has the same structure.
[0054] The slit 1011, the strength reduction hole 101, and the slit 1021, the strength reduction hole 102 together facilitate the wedge 60 to expand upward, downward, leftward, and rightward after insertion, so that the composite tool handle 400 is more firmly locked on the axe 50. Although the embodiment shown in the figure is a curved handle, those skilled in the art should understand that the environmentally friendly handle of the utility model can also be made into a straight handle.
[0055] Although the tool head of the embodiment shown in the drawings is an axe, the tool head may also be a hammer, a hoe or other hand tool.
[0056] Based on the description of the preferred embodiments of the utility model, it should be clear that the utility model defined by the attached claims is not limited to the specific details described in the above description, and many obvious changes to the utility model that do not depart from the spirit or scope of the utility model may also achieve the purpose of the utility model.
Claims
1. An environmentally friendly hand tool with a metal reinforcement component, comprising a tool head and a tool handle, characterized in that: The tool handle is a composite tool handle, and the metal reinforcement component is provided at the front end of the composite tool handle, and the metal reinforcement component includes a first metal reinforcement plate and a second metal reinforcement plate, and the first metal reinforcement plate and the second metal reinforcement plate have symmetrically distributed shapes and structures, and each of the first metal reinforcement plate and the second metal reinforcement plate has a first portion, a transition portion, and a second portion connected to the first portion through the transition portion, and at least one arc groove extending in the longitudinal direction is provided on the first portion, and after the first metal reinforcement plate and the second metal reinforcement plate are fixedly connected, the front portions of the two second portions form a gradually expanding opening; The manual tool further comprises a wedge-shaped piece, wherein the wedge-shaped piece is provided with arc-shaped protrusions respectively matched with the arc grooves; When the front end of the composite tool handle is inserted into the mounting hole of the tool head, a portion of the front end of the composite tool handle passes over the tool head, the wedge is inserted into the opening, and the arc-shaped protrusions respectively cooperate with the arc grooves, and the continuous insertion of the wedge under the action of force increases the required opening, and the size of the portion of the front end of the composite tool handle that passes over the tool head is larger than the size of the mounting hole of the tool head.
2. The environmentally friendly hand tool with a metal reinforcement component according to claim 1, characterized in that: The at least one circular arc groove extending in the longitudinal direction is two circular arc grooves extending in the longitudinal direction.
3. The environmentally friendly hand tool with a metal reinforcement component according to claim 1 or 2, characterized in that: A strength reducing hole is provided at the bottom of the arc groove of the first part.
4. The environmentally friendly hand tool with a metal reinforcement component according to claim 3, characterized in that: In addition to the arc groove, other strength reduction holes are also arranged on the first part at other positions.
5. The environmentally friendly hand tool with a metal reinforcement component according to claim 1, characterized in that: Each of the first metal reinforcing plate and the second metal reinforcing plate is respectively provided with at least one rivet hole. When the first metal reinforcing plate and the second metal reinforcing plate are fixedly connected together, the rivet holes are respectively aligned, and the fixed connection is riveted through the rivet holes.
6. The environmentally friendly hand tool with a metal reinforcement component according to claim 5, characterized in that: The at least one rivet hole is three rivet holes.
7. The environmentally friendly hand tool with a metal reinforcement component according to claim 1, characterized in that: Each of the first metal reinforcing plate and the second metal reinforcing plate is respectively provided with at least one through hole, and when the first metal reinforcing plate and the second metal reinforcing plate are fixedly connected together, the through holes are respectively aligned.
8. The environmentally friendly hand tool with a metal reinforcement component according to claim 7, characterized in that: The at least one through hole is three through holes.
9. The environmentally friendly hand tool with a metal reinforcement component according to claim 1, characterized in that: A portion of the metal reinforcement component is composited within the first thermoplastic material layer.
10. The environmentally friendly hand tool with a metal reinforcement component according to claim 9, characterized in that: The front area of the first thermoplastic material layer includes a front portion, a middle portion and a rear portion, wherein the size of the longitudinal section of the middle portion gradually increases from front to rear, and the size of the rear portion is larger than the size of the mounting hole of the tool head.
11. The environmentally friendly hand tool with a metal reinforcement component according to claim 10, characterized in that: A second thermoplastic material layer is compounded on a portion of the first thermoplastic material layer.
12. The environmentally friendly hand tool with a metal reinforcement component according to claim 11, characterized in that: A third thermoplastic material layer is compounded on a portion of the second thermoplastic material layer.
13. The environmentally friendly hand tool with a metal reinforcement component according to claim 9, characterized in that: A lower bottom surface of the metal reinforcement component of the composite tool shank immediately behind the tool head is exposed.
14. The environmentally friendly hand tool with a metal reinforcement component according to claim 12, characterized in that: The strength of the first thermoplastic material layer is greater than the strength of the second thermoplastic material layer and the strength of the third thermoplastic material layer, and the hardness of the first thermoplastic material layer is greater than the hardness of the second thermoplastic material layer, and the hardness of the second thermoplastic material layer is greater than the hardness of the third thermoplastic material layer.
15. The environmentally friendly hand tool with a metal reinforcement component according to claim 14, characterized in that: The first thermoplastic material layer is a nylon material layer, the second thermoplastic material layer is a polypropylene material layer, and the third thermoplastic material layer is a thermoplastic elastomer layer.