CN100575640C - Wooden floor and its manufacturing method and installation method - Google Patents

Abstract

The invention provides a wooden floor and its manufacturing method and installation method. The wooden floor includes an upper surface, a lower surface, a core layer, two first side walls, and two second side walls. The part of the surface has a first connecting block extending outward in a direction parallel to the upper surface, and the side of the first connecting block facing away from the upper surface has a connecting block extending in a direction parallel to the first side wall and the upper surface at the same time. For the first groove and the first tongue, there is a second connecting block extending outward along a direction parallel to the lower surface on the second side wall near the lower surface, and the second connecting block faces away from the lower surface There is a second groove and a second tongue extending along a direction parallel to the second side wall and the lower surface on one side, the cross section of the first groove is trapezoidal, and the top is wide and the bottom is narrow, and the second tongue The cross-section of the tenon is also trapezoidal with a wide top and a narrow bottom. The wooden floor is easy to install and reliable to connect, and brings great convenience for people's home decoration.

Description

Wooden floor and its manufacturing method and installation method

technical field

The invention relates to a wooden floor, in particular to a wooden floor which is easy to install and reliable in connection, and a manufacturing method and an installing method thereof.

Background technique

With the continuous improvement of the quality of life of the people in our country, people like to use higher-grade floors when decorating their homes, and hope that the floors they use are not only beautiful and practical, but also easy to install, that is, no complicated steps are required, and no tools are required can be installed. For example, Chinese patent ZL02123006.4 and US patent US6928779 both disclose a floor with connecting parts, the structure of which is shown in Figure 1a. This floor comprises upper surface 31, lower surface 32 and central part 33, and a groove 36 is arranged on its first side wall 34, and a tongue 37 is arranged on its second side wall 35. The objects 37 are engaged by moving transversely to each other in a planar manner. But the connection part of this floor, i.e. groove 36 and tongue 37, are engaged in the horizontal direction, may be perpendicular to the wooden floor thickness direction after the floor is installed, the situation that the relative movement of two floorboards occurs, also That is to say, after the floor is installed, there may be cases where the connection is not firm. In addition, since both the groove 36 and the tongue 37 of the floor have a certain inclination angle, it is inconvenient to install. As shown in Fig. 1, Fig. 1 reveals the structure of the floor and a schematic diagram of its installation process. During installation, one floor needs to be tilted at a certain angle, and its tongue 37 is inserted into the groove 36 of the other floor, as shown by the arrow in FIG. 1 . This will cause some troubles for people to install the floor. Therefore people like to use the composite floor whose central part is mainly composed of fiber, because its connecting part can have better elastic deformation capacity, and the installation is very convenient. If this floor has a reliable connection part, the connection of the floor is firm and reliable, and it will be more popular.

Contents of the invention

The main purpose of the present invention is to provide a wooden floor that is easy to install and reliable in connection;

Another object of the present invention is to provide a method of manufacturing the wooden floor;

Yet another object of the present invention is to provide a method for installing the wooden floor.

To achieve the above object, the present invention provides a wooden floor, which comprises

upper surface;

lower surface;

The core layer mainly composed of fiber is formed in the middle of the upper surface and the lower surface, the two adjacent first side walls perpendicular to the upper surface, and the two adjacent first side walls perpendicular to the upper surface and opposite to the two first side walls respectively two second side walls;

Wherein, on the first side wall near the upper surface, there is a first connecting block extending outward along a direction parallel to the upper surface, and the side of the first connecting block facing away from the upper surface has a A first groove and a first tongue extending in the direction of the side wall and the upper surface, the first groove is adjacent to the first tongue, the first groove is adjacent to the first side wall; on the second side wall close to The part of the lower surface has a second connecting block extending outward in a direction parallel to the lower surface, and the side of the second connecting block facing away from the lower surface has a second connecting block extending in a direction parallel to the second side wall and the lower surface. two grooves and a second tongue, the second groove is adjacent to the second tongue, the second groove is adjacent to the second side wall;

The first groove includes a first side, a second side and an upper bottom surface parallel to the upper surface, and the cross section of the first groove is trapezoidal; the second tongue includes a first side, a second side and an upper surface parallel to the lower surface plane, the cross-section of the second tongue is trapezoidal; the upper plane of the second tongue has a groove extending parallel to the direction of the second side wall and the lower surface at the same time, and the angle formed by the first side of the first groove and the upper bottom surface It is an acute angle greater than 26°, and the angle formed by the second side of the first groove and the virtual extension surface of the upper bottom surface is an obtuse angle less than 150°; the angle between the first side of the second tongue and the upper plane is the same as that of the first The size of the included angle formed by the first side of a groove and the upper bottom surface is equal, and the size of the included angle formed by the second side of the second tongue and the virtual extension surface of the upper plane is equal to that of the second side of the first groove and the upper bottom surface. The angles formed by the virtual extension surfaces are equal in size.

The present invention also provides a method for making the wood floor, comprising

Cut out a first straight groove near an edge of the lower surface of the semi-finished wooden floor along a direction parallel to the edge extension to form a first side wall; cut off the core layer of the first straight groove facing away from the first side wall A part of the lower plane and the second side of the first tongue and tenon are formed; the second straight groove is cut along the direction parallel to the extension of the edge near the edge of the upper surface of the semi-finished wood flooring product opposite to the first side wall, forming the second straight groove Two side walls; cut off a part of the core layer of the second straight groove facing away from the second side wall to form the upper plane and the first side of the second tongue; A groove is cut out on one side of the upper surface along the extending direction of the second tongue;

It is characterized by:

The first groove is obtained after cutting the two groove walls of the first straight groove parallel to the first side wall, and the angle between the first side surface and the upper bottom surface of the first groove is kept to be An acute angle greater than 26°, the angle formed by the second side of the first groove and the virtual extension surface of the upper bottom surface is an obtuse angle less than 150°;

After cutting the second straight groove parallel to the second side wall and facing away from the second side wall, the second groove is obtained, and the second side surface of the second tongue and tongue is kept in contact with the second side wall during cutting. The angle formed by the virtual extension surface of the upper plane is equal to the angle formed by the second side surface of the first groove and the virtual extension surface of the upper bottom surface.

The present invention also provides a method of installing the wood floor, comprising

Align the first groove of the wooden floor to be laid with the second tongue of the adjacent laid wooden floor;

Apply a downward force to the wooden floor to be laid along the direction perpendicular to the upper surface of the wooden floor, so that the second tongue of the wooden floor that has been laid is elastically deformed and enters the space range of the first groove of the wooden floor to be laid;

Continue to apply force to the wooden floor to be laid in the same direction until the upper bottom surface of the first groove of the wooden floor to be laid is attached to the upper plane of the second tongue of the wooden floor that has been laid.

The wooden floor provided by the present invention is convenient and easy to install, and the installed wooden floor is perpendicular to the thickness direction of the floor, and two adjacent floors are not easy to move relative to each other, and the connection is reliable.

Description of drawings

Fig. 1 is a kind of structure of existing floor and schematic diagram of installation process thereof;

Fig. 2 is a structural schematic diagram of the first groove and the first tongue and tenon of the wooden floor of the present invention;

Fig. 3 is a schematic diagram of the structure of the second groove and the second tongue and tenon of the wooden floor of the present invention;

Fig. 4 is a schematic diagram of the manufacturing process of the first groove and the first tongue and tenon of the wooden floor of the present invention;

Fig. 5 is a schematic diagram of the manufacturing process of the second groove and the second tongue and tenon of the wooden floor of the present invention;

Fig. 6 is a schematic diagram of the wooden floor installation process of the present invention.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Detailed ways

Referring to FIG. 2 , it is a schematic diagram of the structure of the first groove and the first tongue and tongue of the wooden floor according to the present invention. The appearance of this wooden floor is approximately a rectangular or square wooden floor. The wooden floor is composed of an upper surface 1, a lower surface 2, and a core layer 3 formed between the upper surface 1 and the lower surface 2, which is mainly composed of fiber. Sidewalls, wherein two adjacent sidewalls are first sidewalls 4 (only one is shown in the figure), and the other two sidewalls respectively opposite to the two first sidewalls 4 are second sidewalls 5 (figure 3).

On the part of the first side wall 4 close to the upper surface 1, a first connecting block 51 extending outward along a direction parallel to the upper surface 1 is provided, and on the side of the first connecting block 51 facing away from the upper surface 1, a The first groove 6 and the first tongue 53, the first groove 6 and the first tongue 53 are parallel to the first side wall 4 and the upper surface 1 at the same time, and are parallel to the first side wall 4 and the upper surface. 1 direction extension. The first groove 6 adjoins the first tongue 53 and the first groove 6 also adjoins the first side wall 4 . The cross section of the first groove 6 is trapezoidal. Wherein, the first groove 6 includes a first side 10 , a second side 11 and an upper bottom 12 , and the upper bottom 12 is parallel to the upper surface 1 of the wooden floor. The first side of the first tongue 53 coincides with the second side 11 of the first groove 6, that is, the second side 11 of the first groove 6 is also the first side of the first tongue 53 at the same time. 53 also includes a lower plane 54 and a second side 55 . There is also a joint surface 9 perpendicular to the upper surface 1 and adjacent to the upper surface 1 on the outermost side of the wooden floor. After the wooden floor is installed, the joint surface 9 will be closely attached to the second side wall 5 of another wooden floor. It will be described in detail in the wood floor installation method section of this article.

For the convenience of processing and installation, the distance from the upper bottom surface 12 of the first groove 6 to the upper surface 1 should be 2/5 of the thickness of the wooden floor, The distance between a tongue 53 lower plane 54) should be slightly less than 1/5 of the wood floor thickness, that is, the distance from the first tongue 53 lower plane 54 to the upper surface 1 should be slightly less than 3/5 of the wood floor thickness. Meanwhile, at the lower end of the first side surface 10 of the first groove 6 , a connecting surface 58 parallel to the upper surface 1 and extending along the extending direction of the groove 6 is provided. The connecting surface 58 connects the first side 10 of the first groove 6 and the first sidewall 4 .

In addition, the angle α1 formed by the first side surface 10 of the first groove 6 and the upper bottom surface 12 should be an acute angle greater than 26°, while the second side surface 11 and the virtual extension surface of the upper bottom surface 12 (the dotted line part in the figure) form The included angle α2 should be an obtuse angle less than 150°, and the included angle α1 and the included angle α2 should preferably be complementary angles, so that the first groove 6 with a trapezoidal cross section forms a left-right symmetrical figure, which is more beautiful and practical.

Opposite the first side wall 4 is a second side wall 5 . Referring to Fig. 3, the structures of the second groove and the second tongue and tongue of the wooden floor of the present invention are disclosed. It can be seen from the figure that near the first side wall 5 close to the lower surface 2, a second connecting block 52 extending outward along a direction parallel to the lower surface 2 is provided, and the second connecting block 52 faces away from the lower surface. 2, a second groove 56 and a second tongue 7 are provided. The second groove 56 and the second tongue 7 are parallel to the second side wall 5 and the lower surface 2 at the same time, and along the The two sidewalls 5 extend in the direction of the lower surface 2 . The second groove 56 is also adjacent to the second tongue 7 , and the second groove 56 is adjacent to the second side wall 5 , and the cross section of the second tongue 7 is also trapezoidal.

The shape, size and dimension of the second tongue 7 are consistent with the first groove 6, so as to ensure that the second tongue 7 can be tightly engaged with the first groove 6 when the wooden floor is installed, which is a reliable connection for the wooden floor. is very important.

The second tongue 7 includes a first side 13 , a second side 14 and an upper plane 15 , the upper plane 15 is parallel to the upper surface 1 of the wooden floor. The first side of the second groove 56 also coincides with the second side 14 of the second tongue 7, the second side of the second groove 56 coincides with the second side wall 5, and the second groove 56 also includes a lower bottom surface 57.

On the upper plane 15 of the second tongue 7 there is a groove 8 extending in a direction parallel to the second side wall 5 and the lower surface 2 at the same time. The slot 8 includes a first side 18 and a second side 19 . When the first side 13 and the second side 14 of the tongue 7 are pressed in the cross-sectional direction of the groove 8, the tongue 7 will be elastically deformed so that the first side 18 and the second side 19 of the groove 8 are inward Tilting, when the extrusion disappears, the tongue and tenon 7 can return to its original shape.

Since the first groove 6 is tightly engaged with the second tongue 7 during installation, the shape, size and dimension of the second tongue 7 should be consistent with the first groove 6 . Therefore, the distance between the upper plane 15 of the second tongue 7 and the lower surface 2 of the wooden floor should be 3/5 of the thickness of the wooden floor, and the length of the upper plane 15 of the second tongue 7 should be slightly shorter than the length of the bottom surface of the first groove 6 . In addition, the size of the included angle α3 formed by the first side 13 of the second tongue 7 and the upper plane 15 should be the same as the size of the included angle α1 formed by the first side 10 of the first groove 6 and the upper bottom surface 12, which is greater than The acute angle of 26 °; And the size of the included angle α4 that the second side 14 and the imaginary extension surface of upper plane 15 (dotted line part in the figure) form, should be with the virtual extension of first groove 6 second side 11 and upper bottom surface 12 The included angle α2 formed by the surfaces has the same magnitude, which is an obtuse angle less than 150°. In this way, when the wooden floor is installed, the first groove 6 and the second tongue 7 can be closely engaged.

When installing a wooden floor, if the corners where the first groove 6 and the second tongue 7 contact each other are sharp corners, these corners will be worn, and the reliability of the connection between the first groove 6 and the second tongue 7 will be affected. Sex, which is not conducive to the connection of wooden floors. Therefore, the edges and corners where the first groove 6 and the second tongue and tenon 7 are in contact with each other during the wooden floor installation process should be rounded, that is, the edges and corners 24 formed by the first side 10 of the first groove 6 and the connecting surface 58, the first The corner 23 formed by the second side 11 of the groove 6 and the lower plane 54 of the first tongue 53 should be a rounded corner, while the corner 25 formed by the upper plane 15 of the second tongue 7 and the first side 13, the upper plane 15 The corner 26 formed with the second side 14 and the corner 27 formed between the second side 14 of the second tongue 7 and the bottom surface 57 of the second groove 56 are also rounded. At the same time, the corner 22 formed by the lower plane 54 of the first tongue 7 and the second side 55 should preferably also be a rounded corner.

After introducing the structure of the wooden floor of the present invention, the manufacturing method of the wooden floor is introduced below. Referring to Fig. 4 and Fig. 5, Fig. 4 discloses a schematic diagram of the manufacturing process of the first groove and the first tongue of the wooden floor of the present invention, and Fig. 5 discloses a schematic diagram of the manufacturing process of the second groove and the second tongue of the wooden floor of the present invention.

Referring to Fig. 4, Fig. 4a, Fig. 4b, Fig. 4c, and Fig. 4d are schematic diagrams of four main steps in manufacturing the first groove 6 and the first tongue 53 of the wooden floor respectively. The wood flooring of the present invention mainly uses semi-finished wood flooring, which is a rectangular or square wood flooring block that has only been preliminarily cut, and its four edges have not undergone any processing. As shown in Figure 4a, when manufacturing the first groove 6 and the first tongue 53 of the wooden floor, first cut out the first straight groove 16 near one of the edges of the lower surface 2 of the semi-finished product along the extending direction parallel to the edge, The depth of the first straight ditch 16 should be 3/5 of the wood floor thickness, and its width should be consistent with the length of the opening end opposite to the upper bottom surface 12 in the first groove 6 . After the straight groove 16 is cut, a groove wall opposite to the edge is cut, so that the first side wall 4 of the wooden floor can be formed. Then, as shown in FIG. 4 b , a part of the core layer of the straight groove 16 facing away from the first side wall 4 is cut off, and after simple cutting, the lower plane 54 and the joint surface 9 of the first tongue 53 are formed. Finally, as shown in Figure 4c and Figure 4d, the first straight groove 16 is cut parallel to the two groove walls of the first side wall 4 to form the first groove 6, and the cutting must be carried out according to the designed angle. The included angle between the second side surface 11 and the upper bottom surface 12 of the first recess 6 is a designed angle α1, and the included angle between the first side surface 10 and the virtual extension surface of the upper bottom surface 12 is a designed angle α2. At the same time, the corner 24 formed by the first side 10 of the first groove 6 and the connecting surface 58, the corner 23 formed by the second side 11 of the first groove 6 and the lower plane 54 of the first tongue 53 are processed into rounded corners . At the same time, preferably, the corner 22 formed by the lower plane 54 of the first tongue 53 and the second side 55 is also rounded. So far, the processing of the first side wall 4 of the wooden floor, the first groove 6 and the first tongue and tongue 53 is completed.

The processing steps of the second groove 56 and the second tongue 7 of the wooden floor are similar to the processing steps of the first groove 6 and the first tongue 53 . As shown in FIG. 5, FIG. 5a, FIG. 5b, FIG. 5c, and FIG. 5d are schematic diagrams of four main steps in processing the second groove 56 and the second tongue 7 of the wooden floor respectively. As shown in Figure 5a, when processing the second groove 56 and the second tongue and tongue 7 of the wooden floor, first cut along the direction parallel to the edge extension near the edge of the upper surface 1 of the semi-finished wooden floor and the first side wall 4 Out of the second straight ditch 17, the depth of the second straight ditch 17 should be 3/5 of the thickness of the wooden floor, and meanwhile, the inner side in the second straight ditch 17 becomes the second side wall 5 of the wooden floor. Then, as shown in Figure 5b, a part of the core layer 3 facing away from the second side wall 5 is cut off, the upper plane 15 of the second tongue 7 is processed, and the corners 25 are processed into rounded corners, and according to the designed angle (α3), process the first side 13 of the second tongue 7 to ensure that the size of the angle α3 formed by the first side of the second tongue 7 and the upper plane 15 is the same as that of the first side 10 of the first groove 6 The angle α1 formed with the upper bottom surface 12 is equal in magnitude. Next, as shown in Figure 5c, a part of the core layer 3 is cut along the extending direction of the second tongue 7 at the position where the second tongue 7 faces the upper surface 1, and a groove 8 is processed. The depth of the groove 8 should not exceed 1/5 of the floor thickness. Finally, as shown in Figure 5d, the second straight groove 17 is cut parallel to the second side wall 5 and facing away from the second side wall 5, and the second side 14 of the second tongue 7 is processed, so that the second The angle α4 formed by the side surface 14 and the imaginary extension surface of the upper plane 15 is equal to the angle α2 formed by the second side surface 11 of the first groove 6 and the imaginary extension surface of the upper bottom surface 12 . At the same time, the edges and corners 26 and 27 are processed into rounded corners. In this way, the second groove 56 and the second tongue and tenon 7 of the wooden floor are basically processed. It should be emphasized that the length of the upper plane 15 of the second tongue 7 should be slightly shorter than the length of the upper bottom surface 12 of the first groove 6. When processing the first side 13 and the second side 14 of the second tongue 7, A certain amount of interference should be left for the second tongue 7 to form close contact with the first groove 6, and the interference amount is preferably 0.03mm-0.08mm.

Use the same method to process another set of the first side wall 4 and the first groove 6, the first tongue 53, the second side wall 5 and the second groove 56, and the second tongue on the other two edges. After 7, after fine trimming, the manufacture of wooden floor is completed.

The wooden floor of the present invention not only has a simple manufacturing method, but also is convenient and easy to install. Here's how to install wooden floors.

Referring to Fig. 6, Fig. 6 is a schematic diagram of the wooden floor installation process of the present invention. As shown in Figure 6a, the wooden floor 42 that has been laid has been laid horizontally on the ground, and the second tongue and tenon 7 of the wooden floor 42 is facing upward. The groove 6 faces downwards and aligns the first groove 6 of the wooden floor 41 with the second tongue 7 of the wooden floor 42 . Then apply a downward force to the wooden floor 41 along the direction perpendicular to the upper surface 1 of the wooden floor 41, as shown in Figure 6b, let the corners 24, 23 of the wooden floor 41 be connected with the corners 25, 23 of the wooden floor 42 respectively. 26 contacts, at this moment, wooden floor 41 and wooden floor 42 obtain preliminary positioning. Then, continue to apply force to the upper surface 1 of the wooden floor 41 along the same direction, as shown in FIG. When the two sides 11 are squeezed, the first side 18 and the second side 19 of the groove 8 are inclined towards the cross-sectional direction, and the second tongue 7 is elastically deformed and enters the space range of the first groove 6 . This stage needs to apply a relatively large force, which needs to be large enough to elastically deform the second tongue 7 . Finally, continue to apply a small force to the upper surface 1 of the wooden floor 41 along the same direction, as shown in Figure 6d, until the second tongue 7 of the wooden floor 42 is fully engaged with the first groove 6 of the wooden floor 41, That is, the first side 10 of the first groove 6 fits with the first side 13 of the tongue 7, the second side 11 of the first groove 6 fits with the second side 14 of the second tongue 7, and the first concave The upper bottom surface 12 of the groove 6 is in contact with the upper plane 15 of the second tongue 7 . At this time, the second tongue 7 will restore its original shape, and the first groove 6 of the wooden floor 41 will be firmly connected with the second tongue 7 of the wooden floor 42 . So far, the wooden floor 41 and the wooden floor 42 are closely connected together, and the installation is completed.

It can be seen from the above wooden floor structure and installation method that the wooden floor connection of the present invention is very reliable. As shown in Figure 6d, after the wooden floor is installed, in the direction parallel to the wooden floor 41 upper surface 1, the wooden floor The first side 10 of the first groove 6 of 41 is attached to the first side 13 of the second tongue 7 of the wooden floor 42, and the second side 11 of the first groove 6 of the wooden floor 41 is connected to the first side 13 of the wooden floor 42. The second side 14 of the two tongues and tenons 7 fits together, and the joint surface 9 of the wooden floor 41 fits with the second side wall 5 of the wooden floor 42, thus ensuring that the wooden floor 41 and the wooden floor 42 are parallel to the upper surface of the wooden floor 41 Tight connections in 1 direction.

In the direction perpendicular to the upper surface 1 of the wooden floor 41, the first side 10 of the first groove 6 of the wooden floor 41 fits with the first side 13 of the second tongue 7 of the wooden floor 42, and the first side 13 of the wooden floor 41 The second side 11 of a groove 6 is attached to the second side 14 of the second tongue 7 of the wooden floor 42, and the upper bottom surface 12 of the first groove 6 of the wooden floor 41 is in contact with the second tongue 7 of the wooden floor 42. The upper plane 15 fits together, thus ensuring the tight connection between the wooden floor 41 and the wooden floor 42 in the direction perpendicular to the surface 1 of the upper wooden floor 41 .

Of course, the above-mentioned introduction is the installation method of the wooden floor, and the disassembly method of the wooden floor is also very simple. As long as a certain force is applied in the opposite direction, the two connected wooden floors can be disengaged. The process is the opposite process of the above-mentioned installation process. , which will not be discussed in detail here.

As can be seen from the above installation method, when installing the wooden floor of the present invention, no tools are needed. During installation, after the wooden floor to be laid is aligned with the wooden floor that has been laid, the upper surface of the wooden floor is perpendicular to the upper surface of the wooden floor. It only needs to apply force, and there is no need to tilt the wooden floor at a certain angle. Ordinary users can install it by hand at home or in the office. At the same time, it is also convenient and easy to disassemble the wooden floor. Users can install or dismantle the wooden floor at any time according to needs, which brings great convenience for people's home decoration.

Finally, it should be noted that the core layer of the wood floor of the present invention is a composite wood floor with fiber as the main component, and the upper surface 1 and the lower surface 2 can be decorated by methods such as paint and wood grain paper paste. The wooden floor has a certain tensile strength, compressive strength, shear resistance, and has a relatively large elastic deformation capacity.

It should be emphasized that the present invention is not limited to the above-mentioned embodiments, such as the change of the angle between the two sides of the tongue and the upper plane, the change of the shape of the groove on the top of the tongue, and the change of the processing steps, etc., should also be included in the present invention. within the scope of the claims.

Claims (4)

1. Wooden floor, including upper surface; lower surface; a core layer mainly composed of fibrous material formed between the upper surface and the lower surface; two adjacent first side walls perpendicular to the upper surface; two second side walls perpendicular to the upper surface and opposite to the two first side walls; It is characterized by: On the first side wall near the upper surface, there is a first connecting block extending outward along a direction parallel to the upper surface, and the side of the first connecting block facing away from the upper surface has a a first groove and a first tongue extending in a direction parallel to both the first side wall and the upper surface, the first groove adjoins the first tongue, the first groove a slot adjoins the first side wall; On the second side wall near the lower surface, there is a second connecting block extending outward along a direction parallel to the lower surface, and the side of the second connecting block facing away from the lower surface has a A second groove and a second tongue extending in a direction parallel to both the second side wall and the lower surface, the second groove adjoining the second tongue, the second groove a slot adjoins the second side wall; The first groove includes a first side, a second side, and an upper bottom surface parallel to the upper surface, and the cross section of the first groove is trapezoidal; The second tongue includes a first side, a second side and an upper plane parallel to the lower surface, and the cross section of the second tongue is trapezoidal; The upper plane of the second tongue has a groove extending along a direction parallel to the second side wall and the lower surface; The angle formed by the first side of the first groove and the upper bottom surface is an acute angle greater than 26°, and the angle formed by the second side of the first groove and the virtual extension surface of the upper bottom surface is less than 150° ° obtuse angle; The angle formed by the first side of the second tongue and the upper plane is equal to the angle formed by the first side of the first groove and the upper bottom surface; The angle formed by the second side of the second tongue and the virtual extension surface of the upper plane is equal to the angle formed by the second side of the first groove and the virtual extension surface of the upper bottom surface. 2. The wooden floor according to claim 1, characterized in that: The corners where the first groove and the second tongue contact each other during installation are rounded. 3. The manufacturing method of the wooden floor according to claim 1, comprising cutting a first straight groove near an edge of the lower surface of the semi-finished wooden floor along a direction parallel to the extension of the edge to form a first side wall; Cutting off a part of the core layer of the first straight groove facing away from the first side wall to form the lower plane and the second side of the first tongue; Cut out a second straight groove near the edge of the upper surface of the semi-finished wooden floor product opposite to the first side wall along a direction parallel to the extension of the edge to form a second side wall; Cutting off a part of the core layer of the second straight groove facing away from the second side wall to form the upper plane and the first side of the second tongue; cutting a groove on the side of the second tongue toward the upper surface along the extending direction of the second tongue; It is characterized by: The first groove is obtained after cutting the two groove walls of the first straight groove parallel to the first side wall, and the angle between the first side surface and the upper bottom surface of the first groove is kept to be An acute angle greater than 26°, the angle formed by the second side of the first groove and the virtual extension surface of the upper bottom surface is an obtuse angle less than 150°; After cutting the second straight groove parallel to the second side wall and facing away from the second side wall, the second groove is obtained, and the second side surface of the second tongue and tongue is kept in contact with the second side wall during cutting. The size of the included angle formed by the virtual extension surface of the upper plane is equal to the size of the included angle formed by the second side surface of the first groove and the virtual extension surface of the upper bottom surface. 4. The installation method of wooden floor according to claim 1, characterized in that: Align the first groove of the wooden floor to be laid with the second tongue of the adjacent laid wooden floor; Apply a downward force to the wooden floor to be laid along the direction perpendicular to the upper surface of the wooden floor, so that the second tongue of the wooden floor that has been laid is elastically deformed and enters the space range of the first groove of the wooden floor to be laid; Continue to apply force to the wooden floor to be laid in the same direction until the upper bottom surface of the first groove of the wooden floor to be laid is attached to the upper plane of the second tongue of the wooden floor that has been laid.

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