WO2021008327A1

WO2021008327A1 - Plastering trowel

Info

Publication number: WO2021008327A1
Application number: PCT/CN2020/098425
Authority: WO
Inventors: 李井建
Original assignee: 杭州巨星科技股份有限公司
Priority date: 2019-07-18
Filing date: 2020-06-28
Publication date: 2021-01-21
Also published as: CN210798199U

Abstract

A plastering trowel, comprising: a blade and a bracket fixed to the blade, the bracket comprising: a bottom base, fixed onto the blade by means of a fastening member; a vertical column, extending from the bottom base in the direction away from the blade; and a gripping part, extending from the end of the vertical column furthest from the blade in the direction of length of the bottom base; the bracket is made of magnesium alloy material, and the bracket is integrally formed using a die casting method. The plastering trowel of the present invention is reduced in weight by over 10% whilst ensuring properties such as strength and rigidity, and has the advantages of being easy to mould, being convenient to manufacture and assemble, and high dimensional precision.

Description

A trowel

Technical field

The invention relates to the field of hand tools, in particular to a trowel.

Background technique

A trowel, a hand tool commonly used in the construction field, is mainly used to smooth, spread or dig cement sand. The blade of the trowel in the prior art is usually made of steel material, and the upper bracket of the blade is usually made of steel or aluminum alloy material, resulting in a heavy weight of the trowel, and the user is prone to fatigue during use, which affects work efficiency. In addition, the bracket and the blade are generally connected by welding, rivets or gluing, which is troublesome to install and the bracket is easy to fall.

Therefore, those skilled in the art devote themselves to developing a trowel that can reduce the weight of the trowel under the premise of meeting the same performance, the bracket is not easy to fall, the product is easy to shape, and the installation is convenient.

Summary of the invention

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is how to provide a trowel that can reduce the weight of the trowel while ensuring the mechanical properties such as strength and rigidity, and the support is not easy to fall. Easy to form and easy to install.

To achieve the above objective, the present invention provides a trowel, including:

blade;

The bracket is fixed on the blade by fasteners;

The bracket is made of magnesium alloy material.

Further, the bracket is integrally formed by die casting.

Further, the support includes:

The base is fixed on the blade by the fastener;

A column extending from the base in a direction away from the blade;

The holding part extends from the end of the upright column away from the blade along the length direction of the base.

Further, the thickness of the vertical column along the length direction of the base gradually decreases from the first connection to the middle of the vertical column, and the first connection refers to the connection between the vertical column and the base; the vertical column The thickness from the middle part of the column to the end of the column away from the blade is uniform.

Further, the width of the upright column along the length direction perpendicular to the base gradually increases from the first connection to the end of the upright column away from the blade; the end of the upright column away from the blade is arc-shaped.

Further, the angle between the axis of the column and the plane where the blade is located is 80-85°.

Further, the angle between the axis along the length of the grip and the plane where the blade is located is 2°-7°.

Further, the side of the base facing the blade is provided with a plurality of first grooves that cooperate with the fastener.

Further, a plurality of the first grooves are distributed at equal intervals along the length direction of the base.

Further, the side of the base facing the blade is provided with a second groove, and the second groove is arranged between two adjacent first grooves.

Further, the fastener is a screw, and the first groove is a threaded hole matched with the screw, so that after the screw passes through the blade, the screw is away from the end surface of the base and the The working surfaces of the blades are on the same plane.

Further, the trowel further includes a grip sleeve, and the grip sleeve is sleeved on the grip portion.

Further, the gripping portion is provided with a thread on an end far away from the upright post, and the thread is connected with a nut; the gripping sleeve is clamped and fixed by the upright post and the nut.

Further, a third groove is provided on the holding part, and the third groove extends along the length direction of the holding part.

Further, the base has a linear structure, the thickness of the base is 10-12 mm, and the width of the base is 11-13 mm.

Another object of the present invention is to provide a stent including:

The base has a connection structure matched with fasteners so as to be detachably fixed to the working part through the fasteners;

A column extending from the base in a direction away from the working part; and

A grip part, extending from the end of the column away from the working part along the length direction of the base;

Wherein, the bracket is made of magnesium alloy material.

Further, the base, the upright post and the holding part are integrally formed by die casting.

The third object of the present invention is to provide a trowel, including:

blade;

Bracket, fixed on the blade;

The support includes: a base, which is fixed on the blade by a fastener; an upright post, which extends from the base in a direction away from the blade; and a holding part, which extends from one end of the upright post away from the blade. Extend along the length of the base;

The bracket is made of magnesium alloy material.

Further, the bracket is integrally formed by die casting.

Further, the fastener is a screw, and the screw passes through the blade to be fixedly connected to the base, and the section of the screw away from the base is on the same plane as the working surface of the blade.

The trowel provided by the present invention has the following technical effects:

1. The bracket of the trowel is made of magnesium alloy material, and the excellent mechanical properties of magnesium alloy, such as low specific gravity, high strength, and strong bearing capacity, make the trowel under the premise of ensuring the strength and rigidity. Compared with the prior art, its weight is reduced by more than 10%;

2. The bracket is processed by die-casting molding method, and the bracket and the blade are fixed by fasteners such as screws, which is easy to form, easy to process and assemble, and has high dimensional accuracy.

In the following, the concept, specific structure and technical effects of the present invention will be further described in conjunction with the accompanying drawings to fully understand the purpose, features and effects of the present invention.

Description of the drawings

Figure 1 is a schematic structural diagram of a stent;

Figure 2 is a schematic diagram of the structure of the trowel;

Figure 3 is an exploded schematic diagram of the trowel;

Figure 4 is a schematic diagram of the structure of the stent;

Figure 5 is a schematic diagram of the assembly of the trowel;

Figure 6 is a schematic diagram of the width of the stent;

Figure 7 is a schematic diagram of the connection between the column and the base.

Among them, 10-blade, 101-working surface, 11-fastener, 111-end surface, 20-bracket, 21-second base, 211-first part, 212-second part, 213-first groove, 214 -Second groove, 215-First surface, 216-Second surface, 22-Second post, 221-First connection, 222-Second connection, 23-Second grip, 231-third Groove, 232-second end, 30-grip sleeve, 31-anti-slip layer, 32-nut, 41-first grip, 42-first column, 43-first base.

Detailed ways

Hereinafter, a number of preferred embodiments of the present invention will be introduced with reference to the accompanying drawings in the specification to make the technical content clearer and easier to understand. The present invention can be embodied by many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

In the drawings, components with the same structure are represented by the same numerals, and components with similar structures or functions are represented by similar numerals.

Example 1

As shown in FIG. 1, a bracket that can be used on a hand tool includes a first base 43, a first holding portion 41 and a first post 42. The first base 43 is used to mount the bracket on the working part of the hand tool. Preferably, the first base 43 can be detachably fixed on the working part by a fastener. A first upright 42 is formed from the first base 43 along the direction away from the working part. Further, the end of the first upright 42 away from the first base 43 continues to extend along the length of the first base 43 to form a first Grip 41. In order to reduce weight while ensuring the strength and rigidity of the bracket, the bracket is made of magnesium alloy material. Preferably, the bracket is integrally formed by die casting.

Example 2

As shown in FIG. 2, a trowel includes a blade 10, a support 20 and a holding sleeve 30. The blade 10 is a working part, used for smoothing, spreading or digging the cement ash. The bracket 20 is fixed on the blade 10 and provides a part for installing a handle for easy operation. If the bracket 20 is too heavy, the overall weight of the trowel will increase, and the user will get tired when using it. In addition, if the strength of the manner in which the bracket 20 is fixed to the blade 10 is not strong enough, the bracket 20 is easily separated from the blade 10, or the strength of the bracket 20 itself is not strong enough, which may easily cause damage to the trowel.

In a preferred embodiment, the bracket 20 is made of magnesium alloy. Preferably, the bracket 20 is manufactured by integral molding by die casting. Compared with steel materials and aluminum alloys, magnesium alloys have lower density, higher strength and elastic modulus, and greater impact load capacity than aluminum alloys. They are lighter metals among practical metals. Using magnesium alloy to make the bracket 20 can effectively reduce the weight of the trowel. Magnesium alloy has good die-casting forming performance. The bracket 20 is manufactured by die-casting using magnesium alloy, with small dimensional tolerances and high surface accuracy, and can be assembled and applied without cutting processing.

As shown in FIG. 3, FIG. 4, and FIG. 5, the bracket 20 includes a second base 21, a second post 22 and a second holding portion 23. The second base 21 is linear and is fixedly connected to the blade 10. The second base 21 has a first surface 215 in contact with the blade 10 and a second surface 216 opposite to the first surface 215. The second post 22 protrudes obliquely from the second surface 216 of the second base 21, and one end is connected to the second surface 216. The base 21 is connected to form a first connection 221, and the other end is connected to the second holding portion 23 to form a second connection 222. The second holding portion 23 is formed by extending from the second connection 222 of the second column 22 along the length direction of the second base 21. The axial direction of the second holding portion 23 may be parallel to the second base 21 or may form an angle with the second base 21.

The second base 21 is divided into two parts by the second upright 22, namely the first part 211 and the second part 212. The second base 21 is fixedly connected to the blade 10 by a fastener 11. The first surface 215 of the second base 21 is provided with a first groove 213 that cooperates with the fastener 11. A part of the fastener 11 is connected with the first groove 213 on the first part 211, and a part of the fastener 11 is connected with the first groove 213 on the second part 212. The first grooves 213 on the first part 211 are arranged at equal intervals along the length of the blade 10, and the first grooves 213 on the second part 212 are arranged at equal intervals along the length of the blade 10. The first part 211 and the second part The distance L3 between the first grooves 213 on the 212 is preferably 20-25 mm. Preferably, the fastener 11 is a screw, and the first groove 213 is a threaded hole corresponding to the screw. The screw passes through the blade 10 to fit with the threaded hole. The end surface 111 of the screw away from the second base 21 is located at the working surface 101 of the blade 10. On a flat surface. The thickness L1 of the second base 21, that is, the distance between the first surface 215 and the second surface 216, is preferably 10-12 mm. The width L2 of the second base 21, that is, the distance between the two sides of the second base 21 intersecting the first surface 215, is preferably 11-13 mm.

As shown in FIGS. 5 and 7, the thickness L4 of the second upright 22 along the length of the second base 21 gradually decreases from the first connection 221 to the middle of the second upright 22, and its thickness L4 is from the second upright 22 The middle part is uniform along the extending direction of the second upright 22. As shown in FIG. 6, the width L5 of the second upright post 22 along the width direction of the second base 21 gradually increases from the first connection 221 along the extending direction of the second upright post 22. Along the direction in which the second upright 22 extends, the part of the second upright 22 that is higher than the second connection 222 is arc-shaped, that is, the part of the second upright 22 that is higher than the second connection 222 is perpendicular to the second base. 21 The projection on the plane in the length direction is an arc shape.

As shown in FIG. 5, the second post 22 protrudes from the second base 21 obliquely. When the bracket 20 is installed on the blade 10, the inclination angle of the second post 22 is the angle α between the axis where the second post 22 is located and the plane where the blade 10 is located. Preferably, α is 80-85°. The included angle between the axis of the second gripping portion 23 and the plane where the blade 10 is located is β, preferably, β is 5°.

As shown in FIG. 4, in order to further reduce the weight of the bracket 20, a plurality of second grooves 214 are further provided on the first surface 215 of the second base 21, and the second grooves 214 are located at the gaps of the first grooves 213.

As shown in FIG. 5, the second holding portion 23 includes a second end 232 away from the second upright 22, and threads are provided on the second end 232. As shown in FIG. 2, the holding sleeve 30 is sleeved on the second holding portion 23, a nut is fixed on the second end 232, and the holding sleeve 30 is clamped by the second column 22 and the nut. Preferably, a rubber anti-slip layer is provided on the outer edge surface of the grip sleeve 30.

In order to further reduce the weight of the bracket 20, as shown in FIG. 5, a third groove 231 is provided on the second holding portion 23, and the third groove 231 extends along the length direction of the second holding portion 23. The length of the groove 231 is preferably greater than or equal to 1/2 of the length of the second holding portion 23.

Example 3

The structure of the trowel in embodiment 3 is the same as that of embodiment 2, the specification is 8×4 (inch), the distance L3 of the first groove 213 is 20mm, the width L2 of the second base 21 is 11mm, and the thickness L1 is 10mm . The angle α at which the second upright 22 is inclined is 80 degrees, and the included angle β between the axis of the second holding portion 23 and the plane where the blade 10 is located is 5 degrees.

Example 4

The structure of the trowel in embodiment 4 is the same as that of embodiment 2, the specification is 16×4 (inch), the distance L3 of the first groove 213 is 24mm, the width L2 of the second base 21 is 12mm, and the thickness L1 is 11mm . The angle α at which the second upright 22 is inclined is 83 degrees, and the included angle β between the axis of the second holding portion 23 and the plane where the blade 10 is located is 5 degrees.

Example 5

The structure of the trowel in embodiment 5 is the same as that of embodiment 2, the specification is 20×4 (inch), the distance L3 of the first groove 213 is 25mm, the width L2 of the second base 21 is 13mm, and the thickness L1 is 12mm . The angle α at which the second upright 22 is inclined is 80 degrees, and the included angle β between the axis of the second holding portion 23 and the plane where the blade 10 is located is 5 degrees.

The preferred embodiments of the present invention are described in detail above. It should be understood that many modifications and changes can be made in accordance with the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should fall within the protection scope defined by the claims.

Claims

A trowel, including:

blade;

The bracket is fixed on the blade by fasteners;

Wherein, the bracket is made of magnesium alloy material.
The trowel according to claim 1, wherein the bracket is integrally formed by die casting.
The trowel according to claim 1, wherein the support comprises:

The base is fixed on the blade by the fastener;

A column extending from the base in a direction away from the blade;

The holding part extends from the end of the upright column away from the blade along the length direction of the base.
The trowel according to claim 3, wherein the thickness of the upright column along the length of the base gradually decreases from the first connection to the middle of the upright, and the first connection refers to the upright and The connection of the base; the thickness between the middle of the upright column and the end of the upright column away from the blade is uniform.
The trowel according to claim 3, wherein the width of the upright column along the length direction perpendicular to the base gradually increases from the first connection to the end of the upright column away from the blade; the upright column is away from the One end of the blade is arc-shaped.
The trowel according to claim 3, wherein the angle between the axis of the upright post and the plane where the blade is located is 80-85°.
The trowel according to claim 3, wherein the angle between the axis of the grip portion along the length direction and the plane of the blade is 2°-7°.
The trowel according to claim 3, wherein the side of the base facing the blade is provided with a plurality of first grooves that cooperate with the fastener.
8. The trowel according to claim 8, wherein a plurality of the first grooves are distributed at equal intervals along the length of the base.
The trowel according to claim 8, wherein the side of the base facing the blade is provided with a second groove, and the second groove is provided between two adjacent first grooves .
The trowel according to claim 8, wherein the fastener is a screw, and the first groove is a threaded hole matched with the screw, so that after the screw passes through the blade, the The end surface of the screw away from the base and the working surface of the blade are on the same plane.
The trowel according to claim 3, wherein the trowel further comprises a holding sleeve, and the holding sleeve is sleeved on the holding part.
The trowel according to claim 12, wherein the holding part is provided with a thread on an end far away from the upright, and the thread is connected with a nut; and the holding sleeve is formed by the upright and the The nut is clamped and fixed.
The trowel according to claim 3, wherein a third groove is provided on the holding part, and the third groove extends along the length direction of the holding part.
The trowel according to claim 3, wherein the base is a linear structure, the thickness of the base is 10-12 mm, and the width of the base is 11-13 mm.
A support, including:

The base has a connection structure matched with fasteners so as to be detachably fixed to the working part through the fasteners;

A column extending from the base in a direction away from the working part; and

A grip part, extending from the end of the column away from the working part along the length direction of the base;

Wherein, the bracket is made of magnesium alloy material.
The bracket according to claim 16, wherein the base, the post and the holding part are integrally formed by die casting.
A trowel, including:

blade;

Bracket, fixed on the blade;

The support includes: a base, which is fixed on the blade by a fastener; an upright post, which extends from the base in a direction away from the blade; and a holding part, which extends from one end of the upright post away from the blade. Extend along the length of the base;

Wherein, the bracket is made of magnesium alloy material.
The trowel according to claim 18, wherein the bracket is integrally formed by die casting.
The trowel according to claim 18, wherein the fastener is a screw, the screw penetrates the blade and is fixedly connected to the base, and the screw is away from the section of the base and the blade The working surface is on the same plane.