WO2015000175A1

WO2015000175A1 - Hammer

Info

Publication number: WO2015000175A1
Application number: PCT/CN2013/078899
Authority: WO
Inventors: 张建新
Original assignee: 温州国新五金工具有限公司
Priority date: 2013-07-05
Filing date: 2013-07-05
Publication date: 2015-01-08

Abstract

A hammer and a manufacturing method therefor. The hammer comprises a handle and a hammerhead at one end of the handle. The handle comprises a handle main body (4). A metal sheath (1) is disposed at a portion close to the hammerhead, of the handle. A filling protective body (3) is disposed between the handle main body (4) and the metal sheath (1). The filling protective body (3) is high-strength impact resistance engineering plastic which may be PP, epoxy resins, nylon or polycarbonate. The metal sheath (1) is a stainless steel sheath, and the sectional area of the central portion of the sheath is greater than that of each of two ends. During a strike, the metal sheath (1) can protect the filling protective body (3) from deforming and being damaged, so that the filling protective body (3) fully plays a role in protection of the handle main body (4), and accordingly, the handle main body (4) is firm and reliable, and is not easy to break and crack, thereby eliminating hidden safety risks during work; in addition, the handle main body (4) is clean and environmentally-friendly, thereby greatly extending the service life of the hammer.

Description

a hoe

Technical field

The invention belongs to the field of hand tools, and in particular relates to a hoe.

Background technique

The taro is an extremely widely used hand tool that typically consists of a hammer head made of steel or other metal and a handle made of wood or other composite material such as fiberglass. One end of the hammer is a striking portion having a striking face, and the other end is usually due to a horn portion for the rivet. A hammer hole is opened in the middle of the hammer head, and one end of the handle is inserted into the hammer hole of the hammer head through an interference fit, thereby fixing the hammer head and the handle together.

When a hammer is used to strike an object, it may happen that the hitting surface of the hammer does not accurately hit the object to be hit, and the object to be hit hits the handle near the hammer portion. The rupture of the wooden handle or the abrasion of the fiberglass handle produces harmful substances such as fiber yarn and calcium carbonate powder, which endangers the health of the operator and pollutes the surrounding environment. If you continue to use such a hoe, the neck of the handle will break, causing the hammer to separate from the handle, which will cause great safety hazards and shorten the service life of the hoe.

In order to prevent this from happening, some manufacturers use PP. (Polypropylene, polypropylene) covers the handle near the hammer to protect the handle body. However, when the object to be struck hits the handle near the hammer head, it is easy to recess the PP, and the PP is damaged after repeated use, so that the handle body is in an unprotected state, and thus the handle body is not broken or The problem of wear and tear still has great safety hazards, and it also shortens the service life of the steamed bread.

Summary of the invention

In view of the above drawbacks, it is an object of the present invention to provide a boring head which can prevent the coated protective layer PP from being damaged, thereby ensuring the hoe The handle body does not rupture or wear. Another object of the present invention is to provide a method of making a hoe.

In order to achieve the above object, the present invention provides a boring head comprising a handle and a hammer fixed to one end of the handle, the handle comprising a handle body, the handle being provided with a metal sheath near the hammer head, the handle body and the metal guard A filling protector is provided between the sleeves.

Such a hoe handle body, a filling protector and a metal sheath are firmly combined, during the striking process, if The hitting surface of the hammerhead does not accurately hit the object to be hit, and the object to be hit hits the handle near the hammerhead. The metal sheath can protect the filling protection body from deformation and damage, so that the filling protection body can fully exert its function as a protection handle body, so that the handle body is continuously cracked and not worn, thereby eliminating the safety hazard in the operation and being clean and environmentally friendly. Greatly extend the service life of the steamed bread.

Further, the filling protection body is a high-strength impact-resistant engineering plastic if When the object to be hit hits the handle close to the hammer head, the filling protection body attenuates the impact force of the impact, and functions to protect the main body of the handle.

Further, the high-strength impact-resistant engineering plastic is PP, epoxy resin, nylon or polycarbonate.

Further, the metal sheath is a stainless steel sheath, and the stainless steel sheath can protect the filling protection body from deformation or breakage, so that the filling protection body can fully exert its function as a protection handle body.

Further, the middle cross-sectional area of the stainless steel sheath is larger than the cross-sectional area of the both ends, so that the stainless steel sheath, the filling protector and the handle body can be more firmly joined together.

Further, the handle body is a pultrusion rod, and the handle body with high strength is used to ensure the safe use of the hoe.

Further, the handle uses a thermoplastic rubber (TPR) as a protective layer.

Further, the upper part of the protective layer is provided with a pattern on the upper part, and the lower part is provided with a non-slip groove. The handle can absorb sweat, slip, shock, and is beautiful, comfortable and labor-saving.

Further, the handle body is a wooden handle.

Further, the joint portion of the metal sheath and the handle body is an injection molding protection ring, and the injection molding protection ring makes The stainless steel sheath, the filling protector and the wooden handle are more firmly connected and have a beautiful appearance.

Further, the upper part of the grip on the wooden handle is provided with a pattern, and the lower part is provided with a non-slip groove. The handle can absorb sweat, slip, shock, and is beautiful, comfortable and labor-saving.

Further, the pattern includes a first pattern unit including two upper and lower symmetrical two small semicircles having a diameter of 3.2 mm and a diameter of 3.2 mm, and the second pattern unit includes two left and right symmetry Two small semicircles having a diameter of 3.2 mm and a diameter of 3.2 mm; in the direction perpendicular to the axial direction of the handle, the first pattern unit and the second pattern unit are alternately arranged with a pitch of 0.7 mm; staggered in each column along the axial direction of the handle Therefore, the spacing between the pattern elements is 0.7 mm in the direction of 45 degrees from the axial direction of the handle, and such a pattern acts as a non-slip and shockproof.

Further, the anti-slip groove is a streamline anti-slip groove, the interval between the anti-slip grooves is 1.5 mm, the cross-section of the anti-slip groove at both ends is a semicircle with a radius of 0.5 mm, and the cross section of the anti-slip groove at the middle has a radius of 0.75 mm. The semi-circular shape makes such a non-slip groove play a non-slip effect.

Further, the handle body is provided with a hole, and when the filling material is injected, the filling material enters the hole, so that the handle body and the filling protection body are more firmly fixed together.

The present invention also provides a method of making a hoe comprising a handle and a hammer at one end of the handle, the method comprising the steps of:

a) making a metal sheath of the handle;

b) making the handle body;

c) mounting the handle body into the metal sheath;

d) injecting a filling material into a space between the metal sheath and the handle body to form a filling protector;

e) pressing one end of the handle body, the filling protection body and the metal sheath combination into the hammer hole of the hammer head, and bonding with epoxy resin.

Further, step b) further comprises the steps of:

B1) Drill holes in the handle body.

Further, when the handle body is a pultrusion rod, step d) further comprises the steps of:

D1) The filling protector extends to the end of the handle away from the hammer head and is bonded to the handle body.

Further, when the handle body is a pultrusion rod, after step d), the method further comprises the steps of:

D2) Place the TPR protective layer over the end of the handle away from the hammer.

D3) forming a pattern by injection molding on the upper portion of the TPR protective layer;

D4) In the lower part of the TPR protective layer, a non-slip groove is formed by injection molding using a mold.

Further, when the handle body is a wooden handle, after step d), the method further comprises the steps of:

D5) Injection molding protection ring at the joint of the metal sheath and the handle body.

D6) using a laser engraving to form a pattern on the upper part of the grip of the wooden handle;

D7) In the lower part of the grip of the wooden handle, a laser-engraved groove is formed by laser engraving.

DRAWINGS

Figure 1 is a front elevational view of a boring head according to a first embodiment of the present invention;

Figure 2 is a cross-sectional view of the hammer handle of the first embodiment of the present invention;

Figure 3 is a front elevational view of the hammer handle of the second embodiment of the present invention;

Figure 4 is a plan view of a hammer handle according to a second embodiment of the present invention;

Figure 5 is a cross-sectional view of a hammer handle of a second embodiment of the present invention;

Fig. 6 is a schematic view showing the pattern on the handle of the hammer in the embodiment of the present invention.

detailed description

Figure 1 shows a first embodiment of the present invention, the hoe comprising a handle and a hammer fixed to one end of the handle; as shown in Figure 2, the handle includes a handle body 4; the handle is located adjacent the hammer head The metal sheath 1, the handle body 4 and the metal sheath 1 are provided with a filling protection body 3; the handle body 4 is a pultruded rod.

Such a hammer is hitting the handle when it hits the handle near the hammerhead during the striking process. The metal sheath can protect the filling protection body from deformation and damage, so that the filling protection body fully exerts the function of protecting the handle body, so that the handle body is firm and reliable, and does not crack, eliminating the safety hazard in the operation, and being clean and environmentally friendly.

The pultrusion rod refers to a FRP profile produced by a pultrusion process, and the pultrusion process is a continuous glass fiber bundle, a belt or a cloth impregnated with a resin glue, and is formed by an extrusion die under the action of traction. , solidification, continuous production of FRP profiles of unlimited length. This process is most suitable for the production of FRP profiles of various cross-section shapes, such as rods, tubes, solid profiles (I-shaped, trough-shaped, square profiles) and hollow profiles (door and window profiles, blades, etc.). The fiber content in the pultrusion product can be as high as 80%, and the dipping is carried out under tension, and the function of the reinforcing material can be fully exerted, and the product strength is high.

The metal sheath is a stainless steel sheath 1 which is provided with a card slot at a portion where the hammer head is mounted to make the connection between the hammer head and the hammer handle stronger.

The stainless steel sheath has a smaller cross-sectional area at both ends, and the middle cross-sectional area is larger, so that the stainless steel sheath 1, the filling protector 3 and the handle main body 4 can be more firmly joined together.

The stainless steel sheath 1 extends axially from the hammer head along the handle body and has a length of about 1/3 of the length of the handle body.

The filling protection body 3 is PP, and PP can weaken the impact force of the impact and protect the handle body.

TPR is used as the protective layer 2.

The upper portion 6 of the holding portion of the protective layer 2 is provided with a pattern, and the lower portion 7 is provided with a non-slip groove; such a holding portion can absorb sweat, slip, shock, and is beautiful, comfortable and labor-saving.

As shown in FIG. 6, the pattern includes a first pattern unit 8 and a second pattern unit 9 including two vertically symmetrical two small semicircles having a diameter of 3.2 mm and a diameter of 3.2 mm, and a second pattern unit. 9 comprises two left and right symmetrical two small semicircles having a diameter of 3.2 mm and a diameter of 3.2 mm; in a direction perpendicular to the axial direction 10 of the handle, the first pattern unit 8 and the second pattern unit 9 are alternately arranged with a spacing of 0.7 mm. Each row along the axial direction of the handle is staggered such that the spacing between the pattern elements is 0.7 mm in a direction at 45 degrees to the axial direction of the handle 10.

The anti-slip groove is a streamlined anti-skid groove, the interval between the anti-slip grooves is 1.5 mm, the cross-section of the anti-slip groove at both ends is a semicircle with a radius of 0.5 mm, and the cross section of the anti-slip groove at the middle is a semicircle with a radius of 0.75 mm. shape.

The pultrusion rod is provided with a hole, and when PP is injected, PP enters the hole, so that the pultrusion rod and the PP are firmly fixed together.

3-5 shows a handle of a hoe according to a second embodiment of the present invention, the handle includes a handle body 4; a metal sheath 1 is disposed at a portion of the handle near the hammer, and a handle body 4 and the metal sheath 1 are disposed between There is a filling protection body 3; the handle body 4 is a wooden handle, and the wooden handle is made of American premium walnut wood.

The metal sheath is a stainless steel sheath 1, which has a smaller cross-sectional area at both ends and a larger cross-sectional area in the middle, so that the stainless steel sheath 1, the filling protector 3 and the handle body 4 can be more firmly joined together.

The filling protection body 3 is an epoxy resin, and the wooden handle is fixed in a stainless steel casing, and the epoxy resin is resistant to impact and shock, and the impact force of the impact is weakened to protect The function of the handle body greatly improves the impact resistance of the wooden handle; and can prevent the wooden handle of the walnut from being bent or reduced to cause the head to appear loose.

The joint between the stainless steel sheath and the wooden handle is an injection molded protective ring 5 , and the injection molding protection ring 5 makes The stainless steel sheath 1, the filling protection body 3 and the wooden handle 4 are more firmly connected and have a beautiful appearance.

The upper part 6 of the holding part of the wooden handle is provided with a pattern, and the lower part 7 is provided with a non-slip groove; such a holding part can absorb sweat, slip, shockproof, and is beautiful, comfortable and labor-saving.

As shown in FIG. 6, the pattern includes a first pattern unit 8 and a second pattern unit 9, and the first pattern unit 8 includes two vertically symmetrical two small semicircles having a diameter of 3.2 mm and a diameter of 3.2 mm, and a second pattern. The unit 9 comprises two left and right symmetrical two small semicircles having a diameter of 3.2 mm and a diameter of 3.2 mm; in a direction perpendicular to the axial direction 10 of the handle, the first pattern unit 8 and the second pattern unit 9 are alternately arranged with a spacing of 0.7. Millimeter; staggered along each row of the handle axis 10 such that the spacing between the pattern elements is 0.7 mm in a direction at 45 degrees to the axial direction of the handle 10.

The wooden handle is provided with a hole. When the epoxy resin is injected, the epoxy resin enters the hole, so that the wooden handle and the epoxy resin are firmly fixed together.

A third embodiment of the present invention is a method of making a hoe according to the first embodiment, the method comprising the steps of:

1) Make the stainless steel sheath 1 of the handle so that the cross-sectional area of the middle part of the stainless steel sheath 1 is larger than the cross-sectional area of the two ends;

2) making a pultrusion rod as the handle body 4 and drilling a hole in the pultrusion rod;

3) pressing the pultrusion rod into the stainless steel sheath 1 by pneumatic or hydraulic pressure;

4) using a filler material PP to inject the space between the stainless steel sheath 1 and the pultrusion rod, and Extending to the end of the handle away from the hammer head and the pultrusion rod are bonded together to form a filling protection body 3;

5) Place the TPR protective layer 2 on the end of the handle away from the hammer;

6) The upper part of the holding part on the TPR protective layer 2 is formed by mold injection molding, in the TPR protective layer 2 The lower part of the upper holding portion 7 is formed by injection molding to form a non-slip groove;

7) Combine the pultrusion rod, the filling protection body 3 and the stainless steel sheath 1 into the hammer head In the hammer hole, it is bonded with epoxy resin.

A fourth embodiment of the present invention is a method of making a hammer in a second embodiment, the method comprising the steps of:

1) Make a stainless steel sheath 1 of the handle so that the cross-sectional area of the middle portion of the stainless steel sheath 1 is larger than the cross-sectional area of both ends;

2) Using American premium walnut wood, made of wooden handle, as the handle body 4, and drilling holes in the wooden handle;

3) pressing the wooden handle 4 into the stainless steel sheath 1 by pneumatic or hydraulic pressure;

4) using a filling material epoxy resin to inject a space between the stainless steel sheath 1 and the wooden handle 4 to form a filling protection body 3;

5) in the joint part of the stainless steel sheath 1 and the wooden handle 4, injection molding forms a protective ring 5;

6) The upper part 6 of the holding part on the wooden handle 4 is formed by laser engraving, and the lower part of the holding part is held on the wooden handle 4, Laser engraving to form a non-slip groove;

7) Combine the wooden handle 4, the filling protection body 3 and the stainless steel sheath 1 into the hammer head In the hammer hole, it is bonded with epoxy resin.

The hoes of the two embodiments of the present invention were compared with those of the slabs which were only coated with PP, and the results were as follows: the hoes covered with PP: The static hanging force is 70kg and the pull-out force is 1000kg; the steamed bread of the present invention has a static hanging force of 105kg and a pull-out force of 1500kg.

As can be seen from the above data, a stainless steel sheath is used and filled between the handle body and the sheath. The high-strength and impact-resistant engineering plastics greatly improve the strength of the steamed bread, further enhance the safety in use and prolong the service life of the steamed bread.

The specific embodiments of the present invention have been described in detail above. It will be appreciated that many modifications and variations can be made in the present invention without departing from the scope of the invention. Therefore, any technical solution that can be obtained by a person skilled in the art based on the prior art based on the prior art by logic analysis, reasoning or limited experimentation should be within the scope of protection determined by the claims.

Claims

A hoe comprising a handle, the handle comprising a handle body (4), characterized in that: a portion of the handle near the hammer is provided with a metal sheath (1), the handle body (4) and the handle A filling protector (3) is provided between the metal sheaths (1).
The hoe according to claim 1, characterized in that the filling protection body (3) is an engineering plastic.
The hoe according to claim 2, wherein the engineering plastic is polypropylene, epoxy, nylon or polycarbonate.
The hoe according to claim 1, characterized in that the metal sheath (1) is a stainless steel sheath.
The boring head according to claim 4, wherein the cross-sectional area of the middle portion of the stainless steel sheath is larger than the cross-sectional area of the two ends.
The hoe according to claim 1, characterized in that the handle body (4) is a pultrusion rod.
A boring head according to claim 6, characterized in that the handle uses thermoplastic rubber as the protective layer (2).
The boring head according to claim 7, characterized in that the upper portion (6) of the holding portion of the protective layer (2) is provided with a pattern, and the lower portion (7) is provided with a non-slip groove.
The hoe according to claim 1, characterized in that the handle body (4) is a wooden handle.
The boring head according to claim 9, characterized in that the joint portion of the metal sheath (1) and the wooden handle is an injection-molded protective ring (5).
The boring head according to claim 9, characterized in that the upper portion (6) of the grip portion on the wooden handle is provided with a pattern, and the lower portion (7) is provided with a non-slip groove.
A boring head according to claim 8 or 11, wherein the pattern comprises a first pattern unit (8) and a second pattern unit (9), the first pattern unit (8) comprising two upper and lower symmetrical two a small semicircle having a diameter of 3.2 mm and a diameter of 3.2 mm, the second pattern unit (9) comprising two left and right symmetrical two small semicircles having a diameter of 3.2 mm and a diameter of 3.2 mm; in the axial direction with the handle (10) In the vertical direction, the first pattern unit (8) and the second pattern unit (9) are alternately arranged with a pitch of 0.7 mm; each column is staggered along the axial direction of the handle (10) so as to be 45 with the handle axis (10). In the direction of the degree, the spacing between the pattern elements is 0.7 mm.
The boring head according to claim 8 or 11, wherein the anti-slip groove is a streamlined anti-slip groove, the interval between the anti-slip grooves is 1.5 mm, and the cross-section of the anti-slip groove at both ends is a half of a radius of 0.5 mm. The circular, intermediate anti-slip groove has a semi-circular cross section with a radius of 0.75 mm.
The hoe according to claim 1, characterized in that the handle body (4) is provided with a hole.
A method of making a boring head according to any of claims 1-14, the hoe comprising a handle and a hammer at one end of the handle, the method comprising the steps of:

a) making the metal sheath (1) of the handle, the cross-sectional area of the middle portion is larger than the cross-sectional area of the two ends;

b) making the handle body (4);

c) mounting the handle body (4) into the metal sheath (1);

d) injecting a filling material into the space between the metal sheath (1) and the handle body (4) to form a filling protection body (3);

e) One end of the combination of the handle body (4), the filling protection body (3) and the metal sheath (1) is pressed into the hammer hole of the hammer head and bonded with epoxy resin.
The manufacturing method according to claim 15, wherein the step b) further comprises the steps of:

B1) Drilling holes in the handle body (4).
The manufacturing method according to claim 15 or 16, wherein when the handle body (4) is a pultruded rod, the step d) further comprises the steps of:

D1) The filling protection body (3) is extended to the end of the handle away from the hammer head and bonded to the handle body (4).
The manufacturing method according to claim 17, after the step d), the method further comprises the steps of:

D2) A thermoplastic rubber protective layer (2) is placed over the portion of the handle away from the hammer.
The manufacturing method according to claim 18, after the step d), the method further comprises the steps of:

D3) forming a pattern on the upper portion (6) of the thermoplastic rubber protective layer (2) by injection molding using a mold;

D4) In the lower portion (7) of the thermoplastic rubber protective layer (2), a non-slip groove is formed by injection molding using a mold.
The manufacturing method according to claim 15 or 16, when the handle body (4) is a wooden handle, after the step d), the method further comprises the steps of:

D5) Injection molding a protective ring (5) at a joint portion of the metal sheath (1) and the handle body (4).
The manufacturing method according to claim 15 or 16, when the handle body (4) is a wooden handle, after the step d), the method further comprises the steps of:

D6) forming a pattern by laser engraving on the upper portion (6) of the grip portion of the wooden handle;

D7) A non-slip groove is formed by laser engraving at a lower portion (7) of the grip portion of the wooden handle.