A power tool

Abstract

The present application relates to a power tool, comprising: a housing; a power source, at least partially accommodated in the housing; a transmission mechanism, connected to the power source to receive power from the power source and provided with an output shaft; a shield, at least partially accommodating the output shaft and provided with a mounting hole; and a spray mechanism, installed in the mounting hole; the spray mechanism comprises: a water supply pipe; an adapter, connected to the water supply pipe; a spray head, installed on the adapter and provided with a spray port; the spray port is connected to the water supply pipe through the adapter, the diameter of the spray port is smaller than the diameter of the water supply pipe, and the ratio of the inner diameter of the spray port to the inner diameter of the water supply pipe is [1 / 10, 1 / 3]; thereby ensuring the pressure of the spray and improving the effect of the spray.

Description

Technical Field

[0001] The present application relates to the technical field of tools, in particular to power tools. Background Art

[0002] With the development of power tools, slotting machines specifically used for cutting concrete have emerged. A slotting machine is an electric tool for cutting slots in concrete floors or walls, and is widely used in the fields of building decoration or construction.

[0003] During the use of the slotting machine, the high-speed friction between the cutting blade and the concrete will cause heat, and a lot of dust will be generated during the cutting process. Therefore, in the actual use of the slotting machine, another operator is required to spray water on one side to cool down and remove dust.

[0004] However, current spraying often has poor spraying effect, resulting in poor cooling and dust removal effects, so it needs to be improved. Utility Model Content

[0005] Based on this, it is necessary to provide a power tool to address the problem of poor spraying effect.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In one embodiment, a power tool is provided, comprising:

[0008] shell;

[0009] a power source, at least partially contained in the housing;

[0010] a transmission mechanism connected to the power source to receive power from the power source and provided with an output shaft;

[0011] a shield at least partially accommodating the output shaft and provided with a mounting hole; and,

[0012] A spray mechanism is installed in the installation hole;

[0013] The spray mechanism comprises:

[0014] Water supply pipes;

[0015] An adapter connected to the water supply pipe;

[0016] A spray head, mounted on the adapter and provided with a spray port;

[0017] The spray port is connected to the water supply pipe through an adapter, the diameter of the spray port is smaller than the diameter of the water supply pipe, and the ratio of the inner diameter of the spray port to the inner diameter of the water supply pipe is [1 / 10, 1 / 3].

[0018] Optionally, the ratio of the inner diameter of the spray port to the inner diameter of the water supply pipe is 1 / 5 or 3 / 10.

[0019] Optionally, the adapter is provided with a fixing portion, the fixing portion is provided with a mounting portion, and the water supply pipe is sleeved on the mounting portion with an interference fit.

[0020] Optionally, the water supply pipe is a hose, the mounting portion is chamfered, a connecting portion is provided on the adapter, a locking block is threadedly connected to the connecting portion, and a through hole for the water supply pipe to pass through is provided on the side of the locking block away from the adapter.

[0021] Optionally, the diameter of the through hole is larger than the outer diameter of the water supply pipe and smaller than the sum of the maximum diameter of the mounting portion and the wall thickness of the water supply pipe.

[0022] Optionally, a pressurizing chamber is provided inside the adapter, a pressurizing block is connected inside the spray head, and a pressurizing portion is provided on the side of the pressurizing block that contacts the spray head.

[0023] Optionally, a pressurizing hole is provided inside the shower head, and a pressurizing groove is provided on a side wall of the pressurizing hole.

[0024] Optionally, the water pressure in the water supply pipe is at least 0.01 MPa.

[0025] Optionally, the adapter has a rectangular cross-section, an operating portion is provided at one end of the spray head away from the adapter, and a radial cross-section of the operating portion is a regular polygon.

[0026] Optionally, when the spray head is installed in the installation hole, the spray head and the adapter both abut against the side wall of the shield.

[0027] In an embodiment of the present application, a spray head is arranged on the side wall of the shield of the grinding and cutting tool, and water is supplied to the adapter and the spray head through a water supply pipe, so that water is sprayed onto the saw blade; by setting the ratio of the diameter of the spray head to the diameter of the water supply pipe, the pressure of the spray is ensured and the effect of the spray is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of a power tool in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the internal structure of a shield of a power tool in an embodiment of the present application;

[0030] Figure 3 This is a schematic diagram of the overall structure of a spray mechanism in one embodiment of the present application;

[0031] Figure 4is a cross-sectional view of a spray mechanism in one embodiment of the present application;

[0032] Figure 5 Schematic diagram of the structure of a pressure block in one embodiment of the present application.

[0033] Description of the drawings: 1. Housing; 2. Output shaft; 3. Protective cover; 31. Mounting hole; 4. Spray mechanism; 41. Water supply pipe; 42. Adapter; 421. Fixing part; 422. Mounting part; 423. Connecting part; 424. Pressurizing chamber; 425. Connecting pipe; 43. Spray head; 431. Operating block; 44. Spray port; 441. Guide surface; 45. Locking block; 451. Through hole; 5. Pressurizing block; 51. Pressurizing part; 52. Pressurizing hole; 53. Pressurizing groove. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0040] See also Figure 1 and Figure 2 FIG. 1 shows a schematic diagram of the overall structure of a power tool in an embodiment of the present application. Figure 2 A schematic diagram of the internal structure of the shield of a power tool in an embodiment of the present application is shown. An embodiment of the present application provides a power tool, which can be a slotting machine, an angle grinder or a cutting machine. As long as water spraying is required for cooling and dust removal during the cutting process, it is included in the protection of the present application. The power tool includes a housing 1, a power source, a transmission device, an output shaft 2 and a shield 3. The power source is at least partially contained in the housing 1, and the power source is connected to the transmission device to transmit power to the output shaft 2 of the transmission device. Specifically, the power source can be a motor. The output shaft 2 is used to install tool accessories, such as cutting discs, grinding discs, etc. The shield 3 at least partially covers the tool accessories, thereby making the cutting process safer.

[0041] See also Figure 2 and Figure 3FIG3 shows a schematic diagram of the overall structure of the spray mechanism in an embodiment of the present application; the shield 3 may be provided with a mounting hole 31, and the spray mechanism 4 may be installed in the mounting hole 31. Specifically, the spray mechanism 4 may include a water supply pipe 41, an adapter 42, and a spray head 43. The adapter 42 is connected to the water supply pipe 41, and the spray head 43 is installed on one side of the adapter 42. The spray head 43 is provided with a spray port 44. When the spray mechanism 4 is installed, the adapter 42 is located on the outside of the shield 3, the spray head 43 is located on the inside of the shield 3, and the spray port 44 faces the cutting blade or grinding blade at the center of the shield 3.

[0042] In one or more optional embodiments, after the spray head 43 is installed, the shield 3 can be clamped between the spray head 43 and the adapter 42, that is, the spray head 43 can be abutted against the inner wall of the shield 3, and the adapter 42 can be abutted against the outer wall of the shield 3, where the inner wall refers to the side wall facing the inside of the shield 3 toward the tool accessory, and the outer wall refers to the side wall on the outside of the shield 3 away from the tool accessory.

[0043] See also Figure 3 and Figure 4 FIG4 shows a cross-sectional view of a spray mechanism in an embodiment of the present application; in one or more optional embodiments, the water supply pipe 41 may be a hose, such as made of TPU material. A fixing portion 421 may be formed at one end of the adapter 42, and the fixing portion 421 may be formed with a mounting portion 422. The mounting portion 422 may be a chamfer that gradually decreases in diameter from the swivel 42 to the water supply pipe 41. The chamfer may be an inclined surface or a curved surface. The water supply pipe 41 may be sleeved on the mounting portion 422 with an interference fit.

[0044] In one or more optional embodiments, in order to improve the sealing and / or connection stability between the water supply pipe 41 and the mounting portion 422, a connection portion 423 may be formed on the side of the adapter 42 close to the water supply pipe 41, and the connection portion 423 may be an external thread. A locking block 45 may be connected to the connection portion 423, and one side of the locking block 45 may be provided with an internal thread that matches the external thread, and the other side may be provided with a through hole 451 for inserting the water supply pipe 41, and the through hole 451 may be gap-matched or adapted with the water supply pipe 41. In order to facilitate the sliding of the locking block 45 on the water supply pipe 41, the diameter of the through hole 451 in the embodiment of the present application is larger than the outer diameter of the water supply pipe 41; the water supply pipe 41 may pass through the through hole 451 and may be connected to a water pressure source such as a tap water pipe or a water pump.

[0045] In one or more optional embodiments, the diameter of the through hole 451 can be smaller than the sum of the maximum diameter of the mounting portion 422 and the wall thickness of the water supply pipe 41. When the locking block 45 is threadedly connected to the connecting portion 423, the side wall of the locking block 45 located around the through hole 451 can press the portion of the water supply pipe 41 that is sleeved on the mounting portion 422, thereby pressing the water supply pipe 41 onto the mounting portion 422.

[0046] In one or more optional embodiments, in order to facilitate the rotation or clamping of the adapter 42, the adapter 42 may be formed into a polyhedron, such as a cuboid. A pressurized chamber 424 is provided inside the adapter 42. The adapter 42 also has a connecting pipe 425 that communicates with the water supply pipe 41. The connecting pipe 425 is communicated with the pressurized chamber 424 at one end away from the water supply pipe 41. The adapter 42 has an assembly hole on one side of the pressurized chamber 424. The spray head 43 is threadedly connected in the assembly hole, and the assembly hole communicates with the pressurized chamber 424.

[0047] In one or more optional embodiments, the spray head 43 is a hollow cylindrical tube, one end of which is provided with a thread and can be threadedly connected to the inner wall of the mounting hole 31, and the other end is closed. The spray port 44 is provided at one end of the spray head 43 away from the adapter 42, and the spray port 44 is connected to the inside of the spray head 43, that is, it is connected to the water supply pipe 41 through the mounting hole 31, the pressurizing chamber 424, and the connecting pipe 425, so that the water in the water supply pipe 41 is sprayed out through the spray port 44.

[0048] In one or more optional embodiments, an operating block 431 is formed at one end of the spray head 43 away from the adapter 42. The cross-section of the operating block 431 can be a regular polygon, and is preferably a regular hexagon in the embodiment of the present application, so that the spray head 43 can be tightened and fixed with a wrench.

[0049] See also Figure 4 and Figure 5 , FIG5 shows a schematic diagram of the structure of the pressure block in an embodiment of the present application; in one or more optional embodiments, a pressure block 5 may be installed inside the spray head 43, and a pressure portion 51 may be provided on both sides of the pressure block 5, and the pressure portion 51 may be a flat side formed by cutting the pressure block 5. When the pressure block 5 is threadedly connected to the spray head 43, the gap between the pressure portion 51 and the spray head 43 can allow water to pass through. A pressure hole 52 is provided at one end of the pressure block 5 close to the spray port 44, and the pressure hole 52 is a blind hole with one side of the opening facing the spray port 44. It can be understood that the pressure hole 52 can also be formed on the surface of the spray head 43 facing the pressure block 5. The pressure block 5 is provided with a pressure groove 53 located at the periphery of the pressure hole 52, and there is an angle between the extension direction of the pressure groove 53 and the diameter direction of the pressure hole 52. The water pressure in the water supply pipe 41 enters the pressurizing hole 52 through the pressurizing groove 53 after being pressurized by the pressurizing portion 51 in the pressurizing chamber 424 and is sprayed out through the spray port 44 .

[0050] In one or more optional embodiments, a guide surface 441 is provided on the side of the spray port 44 away from the adapter 42. The guide surface 441 may be chamfered. The setting of the guide surface 441 makes the size of the spray port 44 gradually increase from the swivel 42 toward the spray head 43. The inclination angle of the guide surface 441 is (0,90). In the embodiment of the present application, the inclination angle of the guide surface 441 is preferably 45 degrees, so as to increase the diffusion area of ​​the spray port 44 and facilitate the atomization of the spray water.

[0051] In one or more optional embodiments, the ratio of the diameter of the spray port 44 to the inner diameter of the water supply pipe 41 is [1 / 10, 1 / 3], preferably 1 / 5 or 3 / 10 in the embodiment of the present application, wherein the diameter of the spray port 44 is 1.2 mm, the diameter of the water supply pipe 41 is 6 mm or 8 mm, and the inner diameter is 4 mm or 6 mm.

[0052] In one or more optional embodiments, the water pressure in the water supply pipe 41 is at least 0.01 MPa, and the water supply pipe 41 can be connected to the tap water pipe through the adapter 42, that is, in the embodiment of the present application, the water pressure in the water supply pipe 41 is consistent with the tap water pressure, thereby facilitating the spraying of the sprinkler head 43.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A power tool, characterized in that: include: shell; a power source, at least partially contained in the housing; a transmission mechanism connected to the power source to receive power from the power source and provided with an output shaft; a shield at least partially accommodating the output shaft and provided with a mounting hole; and, A spray mechanism is installed in the installation hole; The spray mechanism comprises: Water supply pipes; An adapter connected to the water supply pipe; A spray head, mounted on the adapter and provided with a spray port; The spray port is connected to the water supply pipe through an adapter, the diameter of the spray port is smaller than the diameter of the water supply pipe, and the ratio of the inner diameter of the spray port to the inner diameter of the water supply pipe is [1 / 10, 1 / 3].

2. The power tool according to claim 1, characterized in that: The ratio of the inner diameter of the spray port to the inner diameter of the water supply pipe is 1 / 5 or 3 / 10.

3. The power tool according to claim 1, characterized in that: The adapter is provided with a fixing portion, the fixing portion is provided with a mounting portion, and the water supply pipe is sleeved on the mounting portion with an interference fit.

4. The power tool according to claim 3, characterized in that: The water supply pipe is a hose, the mounting portion is chamfered, a connecting portion is provided on the adapter, a locking block is threadedly connected to the connecting portion, and a through hole for the water supply pipe to pass through is provided on the side of the locking block away from the adapter.

5. The power tool according to claim 4, characterized in that: The diameter of the through hole is larger than the outer diameter of the water supply pipe and smaller than the sum of the maximum diameter of the mounting portion and the wall thickness of the water supply pipe.

6. The power tool according to claim 1, characterized in that: A pressurizing chamber is arranged inside the adapter, a pressurizing block is connected inside the spray head, and a pressurizing portion is arranged on the side of the pressurizing block that contacts the spray head.

7. The power tool according to claim 6, characterized in that: A pressurizing hole is arranged inside the shower head, and a pressurizing groove is arranged on a side wall of the pressurizing hole.

8. The power tool according to claim 1, characterized in that: The water pressure in the water supply pipe is at least 0.01Mpa.

9. The power tool according to claim 1, characterized in that: The cross section of the adapter is a rectangle, an operating portion is provided at one end of the spray head away from the adapter, and the radial cross section of the operating portion is a regular polygon.

10. The power tool according to claim 1, characterized in that: When the shower head is installed in the installation hole, the shower head and the adapter both abut against the side wall of the shield.

Images