CN1044347C - Hammer - Google Patents

Abstract

The present invention relates to a hammer which comprises a handle and a metal knock head, wherein the metal knock head is arranged on one end of the handle; a hole which can accommodate one end of the handle is arranged on the metal knock head near the center; the hole has a threaded region arranged on a position far away from the handle; a polygonal region is arranged on a position near the handle; the cross section of the polygonal region is in a polygon shape, and the cross sectional area of the polygonal region is larger than that of the threaded region; the handle comprises a metal screw bolt and a plastic cement outer shell; the plastic cement outer shell is used for covering the metal screw bolt; one end of the metal screw bolt passes through the polygonal region of the hole of the knock head and is screwed with the thread region.

Description

Hammer

The invention belongs to a kind of hammer.

Hammer commonly used at present, its handle and striking head combine generally all adopt tight fit mode, wherein striking head is dug and is provided with a square or circular port, and an end of this handle is formed a sectional area by little and gradually big and can stretch into the corresponding square or the circular cross-section of this square or circular port, so an end of this handle can be stretched into this square or circular port and borrow external force pressure and tight fit.The material of this handle also has the fiber-reinforced plastic composite except traditional timber.This class hammer, its striking head get loose because of long-term the use easily, not only influence operating efficiency, and also cause personnel or instrument to be injured or destroy by the striking head that gets loose sometimes.

In order to overcome above-mentioned shortcoming, the someone attempts further a wedge being embedded above-mentioned handle and is inserted into an end of this striking head and strengthens the combination that handle is tapped the head.Though this trial has prolonged the time that aforementioned striking head gets loose, manufacturing step is increased and increase cost.

Also have the people that the forging of the metallic striking head of hammer is added man-hour in addition, directly the side to striking head forms a handle that vertically stretches out, again in the rubber sleeve of this handle outer parcel tool shock-absorbing effect.Though this mode major part has solved the problem that striking head gets loose (must prevent that rubber sleeve and handle break away from), yet makes the process of forging processing become very difficult, manufacturing cost also thereby significantly increases.The vibrations that produced when in addition, knocking become fiercer because of handle and striking head for the one forging and molding.Except the forging to metallic striking head adds direct integrally formed handle in man-hour, also there is the people that one end of one metal system handle is formed fork-shaped structure, with rivet the fork-shaped of this metal handle is constructed riveted in the metallic striking head with a rivet hole again, the other end of this metal system handle parcel is with the rubber sleeve of shock-absorbing effect.This mode also has the high and fierce shortcoming of vibrations when knocking of manufacturing cost.

China utility model patent CN2070229U discloses a kind of multi-purpose combined type hardware ﹠ tools, wherein the sleeve pipe as a handle part is set as the screw rod that the one end is rotary with screw thread, this screw rod is with tup or claim that striking head is threaded, this characteristics that are threaded be convenient in conjunction with and be difficult for deviating from, but in the course of the work can not retaining, and can not shock-absorbing.

The purpose of this invention is to provide a kind of handle that makes and be convenient to combine with knocking, and have the hammer of retaining and shock-absorbing measure, and the manufacture method of this hammer is provided.

The object of the present invention is achieved like this: a kind of hammer, comprise one handle and be fixed on the striking head of this handle one end, the nearly middle body of this striking head is provided with a hole that can hold this handle one end, this striking head has been formed a threaded area in the position away from handle in this hole, and be formed a polygon district in the position of the close handle in this hole, the cross section in this polygon district is polygon and its sectional area sectional area greater than this threaded area, this handle comprises a screw rod and a plastic casing, this screw rod has an end of thread, and it can pass the polygon district of this striking head and is screwed on the threaded area of this striking head, this plastic casing is whole except this screw rod is screwed on the end of thread of threaded area of this striking head to wrap up this screw rod securely, and the one end is full of the space between this polygon district and this screw rod substantially.

The metallic striking head of the invention described above, also available other material is made, for example engineering plastics, pottery and fiber-reinforced plastic composite.

The hole of the striking head of the invention described above can be through hole or half through hole, threaded area wherein can be the round thread hole or only the part inwall have the slotted eye of screw thread; The cross section in polygon district wherein can be rule or irregular polygons such as triangle, square, pentagon, hexagon, hexagon or octagonal.

The screw rod of the invention described above can be that whole surface all has the screw rod of screw thread or the screw rod that the part outer surface has screw thread, the part circular of being pruned for circular or a side in its cross section.

The plastic casing of the invention described above can be hard or semi-rigid plastic material, and optionally the outer surface at this plastic casing can further form a rubber sleeve.Appropriate plastic material comprises (but being not limited to) polyvinyl chloride, polyethylene, polyester, Merlon and contains the co-polymer or the admixture of these compositions.

The plastic casing of the invention described above can be any known suitable plastic mold shaping method and forming.

The manufacture method of hammer of the present invention is (A) preparation one screw rod; (B) forge a ferrule, this nearly centre has half square opening that runs through; (C) the nearly centre in the bottom of partly running through the square opening of this ferrule is impacted into a circular hole; (D) on the inwall of the circular port of this ferrule, form and to screw togather this screw flight; (E) end of this screw rod is screwed together in the screw thread of this circular port from the square opening direction of ferrule; (F), on the outer surface of this screw rod, form a plastic casing, this plastic casing and be full of the square opening of this ferrule and the space between this screw rod with the plastic method.

Hammer of the present invention has the following advantages at least:

1. the outer surface thread of screw rod provides the firm attachment of plastic casing;

2. plastic casing is full of the polygon district in this striking head hole and the space between this screw rod, makes screw rod be screwed together in can not to rotate after the threaded area in this striking head hole to get loose, and part shock-absorbing effect is provided.

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.

Fig. 1 is the schematic perspective view of the embodiment of the invention;

Fig. 2 is the exploded perspective schematic diagram among Fig. 1;

Fig. 3 is the last cross section view along 3-3 line among Fig. 2;

Fig. 4 is the lateral plan along 4-4 line among Fig. 2;

Fig. 5 is the striking head schematic perspective view of another embodiment of the present invention.

Embodiments of the invention are illustrated in Fig. 1 to Fig. 4, and wherein this hammer comprises the striking head 30 of an one handle 10 and a metal forging.These striking head 30 nearly middle bodies are provided with a hole that can hold these handle 10 1 ends, these 31 left sides, hole have been formed a threaded area 32 and the right is formed with a square district 33, this square district 33 communicate with this threaded area 32 and the sectional area in this square district 33 greater than this threaded area 32.This handle 10 comprises the igelite shell 12 of a screw rod 20 and this screw rod 20 of parcel.The outer surface of this screw rod 20 is formed a screw thread 21 that can be screwed together in this threaded area 32, and its left end pass this striking head hole 31 square district 33 and be screwed on the threaded area 32 in this hole 31.This striking head 30 that is combined with screw rod 20 is placed in the die cavity (not being shown among the figure) in the plastic mould, the polyvinyl chloride moulded composition of fusion is injected into the interior remaining space of die cavity of this molding die, forms the plastic casing 12 that wraps up this screw rod 20 in cooling and after opening this mould.The left end of this plastic casing 12 is inserted into the square district 33 of this striking head 30, and it is formed the handle that a uniformly dispersing that is suitable for gripping has circular concave point at the other end.

A kind of method that is suitable for the hammer in the shop drawings 1 to Fig. 4 comprises following steps:

(A) make a screw rod;

(B) forge a ferrule, this place, nearly centre has the square opening that half runs through;

(C) the nearly centre in the bottom of partly running through the square opening of this ferrule is impacted into a circular port;

(D) on the inwall of the circular port of this ferrule, form and to screw togather this screw flight;

(E) end of this screw rod is screwed on the screw thread of this circular port from the square opening direction of this ferrule;

(F), on the outer surface of this screw rod, form a plastic casing, this plastic casing and be full of the square opening of this ferrule and the space between this screw rod with the plastic method.

Fig. 5 is the employed striking head 301 of another embodiment of hammer of the present invention, striking head 30 among this striking head 301 and Fig. 1 and Fig. 4 is similar, except the threaded area 321 of this striking head 301 for slotted eye and only the part inwall be provided with screw thread, and the openend of this threaded area 321 respectively digs toward both sides and establishes a shallow ridges 34,35.When this striking head 301 replaces the striking head 30 among Fig. 1 to Fig. 4 and when making a hammer, polyvinyl chloride outer shell can enter the stepping of going forward side by side of gap between this ellipse threaded area 321 and circular screw rod and go into this shallow ridges 34,35.

Claims (11)

1. hammer, comprise one handle and be fixed on the striking head of this handle one end, wherein handle is set as the screw rod that an end is rotary with screw thread, this screw rod is threaded with striking head, it is characterized in that the nearly middle body of this striking head is provided with a hole that can hold this handle one end, this striking head has been formed a threaded area in the position away from the hand groove in this hole, and the close handle position in this hole has been formed a polygon district, the cross section in this polygon district is polygon and its sectional area sectional area greater than this threaded area, this handle comprises a screw rod and a plastic casing, this screw rod has an end of thread, and it can pass the polygon district of this striking head and is screwed on the threaded area of this striking head, this plastic casing is whole except this screw rod is screwed on the end of thread of threaded area of this striking head to wrap up this screw rod securely, and the one end is full of the space between this polygon district and this screw rod.

2. hammer according to claim 1, it is made to it is characterized in that this striking head is selected from a material of engineering plastics, pottery and fiber-reinforced plastic composite.

3. hammer according to claim 1, the hole that it is characterized in that this striking head are through hole or half through hole.

4. hammer according to claim 1 it is characterized in that the hole of this striking head is circle in the position away from handle, and this threaded area is the screw thread that is positioned on this circular port inwall.

5. hammer according to claim 1, the cross sectional shape in polygon district that it is characterized in that this striking head is for being selected from triangle, square, pentagon, hexagon, hexagon and an octagonal shape.

6. hammer according to claim 1, the cross section that it is characterized in that this screw rod is for circular.

7. hammer according to claim 1 is characterized in that this striking head is that metal is made.

8. hammer according to claim 1 is characterized in that the outer surface of this plastic casing is further put a rubber sleeve.

9. hammer according to claim 1 is characterized in that this plastic casing forms with the plastic forming method.

10. hammer according to claim 1 it is characterized in that the hole of this striking head is ellipse in the position away from handle, and this threaded area is the screw thread that is positioned on this slotted eye inwall.

11. a method of making hammer comprises following steps:

(A) make a screw rod;

(B) forge a ferrule, this nearly centre has half square opening that runs through;

(C) the nearly centre in the bottom of partly running through the square opening of this ferrule is impacted into a circular port;

(D) on the inwall of the circular port of this ferrule, form and to screw togather this screw flight;

(E) end of this screw rod is screwed on the screw thread of this circular port from the square opening direction of this ferrule;

(F), on the outer surface of this screw rod, form a plastic casing, this plastic casing and be full of the square opening of this ferrule and the space between this screw rod with the plastic method.

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