Water inlet structure of water drill bit shell

Abstract

The utility model discloses a water inlet structure of a water drill bit shell. Comprising a head shell which comprises a first water cooling area and a water inlet channel in fluid communication with the first water cooling area; the middle cover comprises a second water cooling area matched with the first water cooling area, and after the middle cover and the head shell are assembled, the first water cooling area and the second water cooling area are communicated to jointly form a water cooling area; the output shaft is arranged on the head shell and comprises a water outlet channel, the outer end of the water outlet channel is arranged outside the head shell, the inner end of the water outlet channel is connected with a water outlet pipe, and one end of the water outlet pipe is arranged in the water cooling area so that the water cooling area can be communicated with fluid of the water outlet channel. According to the utility model, through reasonable sealing design, the sealing performance of the cooling system is ensured; the cooling structure of the drill bit shell is optimized, the cooling efficiency is improved, the service life of equipment is prolonged, and meanwhile the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a water inlet structure for a water drill head shell. Background Art

[0002] Water drill is a widely used power tool. Its scientific name is water-source diamond drill. In many cases in life, it is necessary to drill holes on some buildings or model equipment, such as air-conditioning holes, water heater holes, bathroom heater holes, range hood holes, exhaust fan holes, gas pipe holes, etc. It can also be used to open new door holes in concrete load-bearing walls, holes for ventilation ducts, fire-fighting pipes, cable troughs, blasting drilling, reinforcement drilling, etc.

[0003] The water drill delivers water to cool the drill bit and remove chips by rotating the output shaft. The existing common water drills usually have a water flow channel on the water drill head shell or end cover, and the water flow channel connects the water inlet with the water outlet so that the cooling water can be discharged from the water outlet. This structure has high requirements for sealing, and it is difficult to achieve a long-term sealing effect by using sealing rings and other methods. For this reason, the applicant has made improvements. Utility Model Content

[0004] The utility model aims at the deficiencies in the prior art and provides a water inlet structure for a water drill head shell.

[0005] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0006] A water inlet structure for a water drill head shell, comprising

[0007] A head shell, comprising a first water cooling zone and a water inlet channel in fluid communication with the first water cooling zone;

[0008] An intermediate cover, comprising a second water cooling zone matched with the first water cooling zone, wherein when the intermediate cover is assembled with the head shell, the first water cooling zone is connected with the second water cooling zone to form a water cooling zone together;

[0009] The output shaft is arranged on the head shell and includes a water outlet channel. The outer end of the water outlet channel is arranged outside the head shell, and the inner end is connected to a water outlet pipe. One end of the water outlet pipe is arranged in the water cooling zone to connect the water cooling zone with the water outlet channel fluid.

[0010] In the above solution, preferably, a sealing gasket is arranged between the head shell and the middle cover.

[0011] In the above solution, preferably, the sealing gasket covers all outer surfaces of the head shell end wall.

[0012] In the above scheme, preferably, the head shell includes a gear lubrication area, and the gear lubrication area is configured with a gear.

[0013] In the above solution, preferably, the output shaft is arranged through the head shell.

[0014] In the above solution, preferably, the water outlet pipe is a copper pipe.

[0015] In the above solution, preferably, the outer end of the water outlet channel is in fluid communication with the inner cavity of the drill bit.

[0016] In the above solution, preferably, a number of heat dissipation fins are included in the first water cooling area and / or the second water cooling area.

[0017] In the above solution, preferably, a first hole for the water outlet pipe to penetrate into and a second hole for the water outlet pipe to penetrate out are provided on the intermediate cover.

[0018] In the above solution, preferably, sealing rings that cooperate with the water outlet pipe to play a sealing role are respectively arranged at the first hole and the second hole.

[0019] The beneficial effects of the present utility model are as follows:

[0020] Through reasonable sealing design, the present utility model ensures the sealing performance of the cooling system; optimizes the cooling structure of the drill bit housing, improves the cooling efficiency, extends the service life of the equipment, and also improves the working efficiency. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the present utility model.

[0022] Figure 2 It is a schematic diagram of the disassembled state of the present utility model.

[0023] Figure 3 It is a schematic diagram of the intermediate cover of the present utility model.

[0024] Figure 4 It is a schematic diagram of the sectional state of the present utility model. Detailed Embodiments

[0025] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments:

[0026] Refer to Figures 1 - 4 , a water drill bit housing water inlet structure, including a head shell 1, an intermediate cover 2 and an output shaft 3. The head shell 1 is connected to the intermediate cover 2. The intermediate cover 2 is used to be installed on the water drill main body. After the head shell 1, the intermediate cover 2 and the water drill main body are assembled with each other, they form the overall outer shell of the water drill.

[0027] For the head shell 1, it has a cavity for installing the output shaft 3. Specifically, the output shaft 3 is arranged through the head shell 1, and several sealing rings can be installed between its outer wall and the inner wall of the corresponding cavity of the head shell 1. For example, sealing rings are respectively arranged at the two end positions of the output shaft 3 in the cavity, or an additional sealing ring is additionally arranged at the position between these two sealing rings to fill the gap between the output shaft 3 and the cavity to play a sealing role.

[0028] A water outlet channel 31 is opened on the output shaft 3, and the water outlet channel 31 is opened through, that is, the inner end of the output shaft 3 has an inlet opening of the water outlet channel 31, and the outer end of the output shaft 3 has an outlet opening of the water outlet channel 31. The outlet opening is correspondingly arranged at the drill bit and is in fluid communication with the inner cavity of the drill bit.

[0029] In this embodiment, a water outlet pipe 4 is installed at the inlet opening at the inner end of the output shaft 3. The end of the water outlet pipe 4 is in fluid communication with the water outlet channel 31, and a sealing ring is installed between the end of the water outlet pipe 4 and the output shaft 3. As one implementation manner, the water outlet pipe 4 is a copper pipe.

[0030] In this embodiment, the head shell 1 further has a first water cooling area 11, a water inlet channel 12 fluidly connected to the first water cooling area 11, and a gear lubrication area 13. Among them, the water inlet channel 12 is fluidly connected to a water inlet pipe 5 installed on the head shell 1, and the water inlet pipe 5 is used to connect an external cooling water pipe so that cooling water flows into the first water cooling area 11 through the water inlet pipe 5.

[0031] Correspondingly, the intermediate cover 2 has a second water cooling area 21 that cooperates with the first water cooling area 11. Their positions and contours are adapted so that after the intermediate cover 2 and the head shell 1 are assembled and connected, the first water cooling area 11 and the second water cooling area 21 are in fluid communication with each other and their edges are aligned, jointly forming a water cooling area.

[0032] In this embodiment, the first water cooling area 11 and / or the second water cooling area 21 includes a plurality of heat dissipation fins 6. The heat dissipation fins 6 extend from the inner wall of the water cooling area to the outer end, and can extend to be connected to the inner wall on the other side, or can extend without being connected to the inner wall on the other side to improve the cooling effect.

[0033] As Figure 2 shown, both the first water cooling area 11 and the gear lubrication area 13 are arranged at the inner end of the head shell 1, and they are separated from each other and not in communication. The gear lubrication area 13 is used for injecting lubricating oil for lubricating the gears and for accommodating the gears.

[0034] In this embodiment, a sealing gasket 7 is disposed between the head shell 1 and the intermediate cover 2. The sealing gasket 7 covers all the outer surfaces of the end walls of the head shell 1 and the intermediate cover 2, specifically referring to the outer periphery of the inner end face of the head shell 1 having the first water-cooling area 11 and the end face of the partition wall 14 located between the gear lubrication area 13 and the first water-cooling area 11. The intermediate cover 2 has the outer periphery of the end face of the second water-cooling area 21 and the end face of the intermediate partition wall 22. Among them, the intermediate partition wall 22 of the intermediate cover 2 is also used to isolate the second water-cooling area 21 and the area corresponding to the gear lubrication area 13, so that the two are not communicated with each other.

[0035] Further, a first hole 23 for the water outlet pipe 4 to penetrate into and a second hole 24 for the water outlet pipe 4 to penetrate out are formed in the intermediate cover 2. As pointed out above, one end of the water outlet pipe 4 is in fluid communication with the water outlet channel 31. Therefore, the water outlet pipe 4 penetrates into means that the other end of the water outlet pipe 4 penetrates into the intermediate cover 2 from below the intermediate cover 2; the water outlet pipe 4 penetrates out means that after the water outlet pipe 4 enters the intermediate cover 2, it then penetrates out from the second hole 24 to enter the water-cooling area jointly formed by the first water-cooling area 11 and the second water-cooling area 21, thereby forming the entire cooling water flow path, that is, the cooling water enters the water-cooling area from the water inlet pipe 5, then enters the water outlet channel 31 via the water outlet pipe 4, and finally is discharged from the water outlet channel 31 into the drill bit.

[0036] To further improve the sealing effect, in this embodiment, sealing rings that cooperate with the water outlet pipe 4 to play a sealing role are respectively disposed at the first hole 23 and the second hole 24 to prevent the cooling water from entering other areas from the cooling area via the second hole 24 or the first hole 23.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water drill bit shell water inlet structure, characterized in that: including a head shell, which includes a first water cooling area and a water inlet passage that is in fluid communication with the first water cooling area; an intermediate cover, which includes a second water cooling area that cooperates with the first water cooling area. When the intermediate cover is assembled with the head shell, the first water cooling area and the second water cooling area are in communication to jointly form a water cooling area; an output shaft, which is disposed on the head shell and includes a water outlet passage. The outer end of the water outlet passage is disposed outside the head shell, and the inner end is connected to a water outlet pipe. One end of the water outlet pipe is disposed in the water cooling area so that the water cooling area is in fluid communication with the water outlet passage.

2. The water inlet structure of the water drill bit housing according to claim 1, wherein: A sealing gasket is disposed between the head shell and the intermediate cover.

3. The water inlet structure of a water drill bit housing according to claim 2, characterized in that: The sealing gasket covers all outer surfaces of the end wall of the head shell.

4. A water drill bit housing water inlet structure according to any one of claims 1 - 3, characterized in that: The head shell includes a gear lubrication area, and a gear is disposed in the gear lubrication area.

5. The water inlet structure of a water drill bit housing according to claim 1, characterized in that: The output shaft is disposed through the head shell.

6. The water inlet structure of a water drill bit housing according to claim 1 or 5, characterized in that: The water outlet pipe is a copper pipe.

7. The water inlet structure of the water drill bit housing according to claim 1, characterized in that: The outer end of the water outlet passage is in fluid communication with the inner cavity of the drill bit.

8. The water inlet structure of a water drill bit housing according to claim 1, characterized in that: The first water cooling area and / or the second water cooling area includes a plurality of heat dissipation fins.

9. The water inlet structure of a water drill bit housing according to claim 1 or 8, characterized in that: The intermediate cover is provided with a first hole for the water outlet pipe to penetrate into and a second hole for the water outlet pipe to penetrate out.

10. The water inlet structure of the water drill bit housing according to claim 9, characterized in that: Sealing rings that cooperate with the water outlet pipe to play a sealing role are respectively disposed at the first hole and the second hole.

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