Cooling mechanism for water drill

Abstract

The present invention discloses a cooling mechanism for a water drill, including a housing and an output shaft, wherein the housing is provided with a water inlet, the output shaft is at least partially rotatably arranged in the housing, a water-passing cavity is axially arranged in the output shaft, one end of the water-passing cavity is closed and the other end is open, a first water-passing hole is arranged on the side wall of the output shaft, a sealing member is arranged on the output shaft, the sealing member is in sealing contact with the housing, the sealing member is provided with a second water-passing hole, the water inlet, the second water-passing hole, the first water-passing hole, and the water-passing cavity are sequentially connected. The present invention arranges a water inlet on the middle cover, and the water inlet is directly connected to the water-passing cavity of the output shaft through the second water-passing hole of the sealing member and the first water-passing hole of the output shaft, which has low cost, compact structure, and light weight, and the sealing member is located between the first bearing and the second bearing, which can prevent water from flowing into other components.

Description

Technical Field

[0001] The invention relates to the technical field of electric tools, in particular to a cooling mechanism for a water drill. Background Art

[0002] Water drill, whose scientific name is water-source diamond drill, or diamond drill for short, can drill holes for air conditioners, water heaters, bathroom heaters, range hoods, exhaust fans, gas pipes, etc. It can also be used to drill new door holes in concrete load-bearing walls, holes for ventilation ducts, fire-fighting pipes, cable troughs, blasting holes, reinforcement holes, etc.

[0003] The water drill cools the drill bit and removes chips by delivering water during the rotation of the output shaft. The existing method generally adopts a copper elbow, which is connected to an external water source. The cooling water enters the output shaft from the tail of the output shaft through the copper elbow, and then sprays out from the head of the output shaft. This method is not only costly and wastes a lot of manpower and material resources, but also the copper elbow has poor roundness, resulting in poor sealing between the output shaft, causing water to flow out, affecting the cooling effect, and also damaging other components, resulting in the scrapping of the water drill.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a cooling mechanism for water drill. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a cooling mechanism for a water drill.

[0006] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0007] A cooling mechanism for a water drill comprises a casing and an output shaft, wherein the casing is provided with a water inlet, the output shaft is at least partially rotatably arranged in the casing, a water passage cavity is axially arranged in the output shaft, one end of the water passage cavity is closed and the other end is open, a first water passage hole is arranged on the side wall of the output shaft, a sealing member is arranged on the output shaft, the first water passage hole and the sealing member are both located between the first bearing and the second bearing, the sealing member is in sealing contact with the casing, the sealing member is provided with a second water passage hole, the water inlet, the second water passage hole, the first water passage hole and the water passage cavity are sequentially connected.

[0008] As a further improvement of the present invention, the output shaft is at least partially rotatably disposed in the casing through a first bearing and a second bearing, and the first water hole and the sealing member are both located between the first bearing and the second bearing.

[0009] As a further improvement of the present invention, the sealing member includes two first sealing sleeves arranged axially opposite to each other and an isolation sleeve arranged between the two first sealing sleeves, the two first sealing sleeves are both sleeved on the outer wall of the output shaft, and the second water hole is arranged on the side wall of the isolation sleeve.

[0010] As a further improvement of the present invention, at least one third water hole is provided on the side wall of the isolation sleeve, and at least one fourth water hole is provided on the side wall of the output shaft, and the fourth water hole is respectively connected to the water cavity and the corresponding third water hole.

[0011] As a further improvement of the present invention, the sealing member includes a second sealing sleeve, the second sealing sleeve is sleeved on the outer wall of the output shaft, and the second water hole is arranged on the side wall of the second sealing sleeve.

[0012] As a further improvement of the present invention, at least one fifth water hole is further provided on the side wall of the second sealing sleeve, and at least one sixth water hole is further provided on the side wall of the output shaft, and the sixth water hole is respectively connected to the water cavity and the corresponding fifth water hole.

[0013] As a further improvement of the present invention, the casing includes a shell and a middle cover matched with the shell, the first bearing is arranged in the shell, and the second bearing and the water inlet are both arranged in the middle cover.

[0014] As a further improvement of the present invention, the water inlet portion includes a first water inlet joint, a first water inlet cavity is provided in the first water inlet joint, and the first water inlet joint is threadedly connected to the middle cover.

[0015] As a further improvement of the present invention, the water inlet portion includes a second water inlet joint, a second water inlet cavity is provided in the second water inlet joint, and the second water inlet joint is integrally formed with the middle cover.

[0016] A water drill comprises the cooling mechanism for the water drill described above.

[0017] The beneficial effects of the present invention are:

[0018] The present invention has a simple structure, is easy to use and has high reliability. A water inlet is arranged on the middle cover, and the water inlet is directly connected to the water cavity of the output shaft through the second water hole of the seal and the first water hole of the output shaft. No other components need to be arranged. The present invention has low cost, compact structure and light weight. The seal arranged on the outer wall of the output shaft can ensure sealing. In addition, the seal is located between the first bearing and the second bearing, which can prevent water from flowing into other components and extend the service life of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment 1 of the present invention;

[0021] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0022] Figure 3 It is a structural schematic diagram of a preferred embodiment 2 of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a preferred embodiment 3 of the present invention;

[0024] In the figure: 10, casing, 12, output shaft, 22, water cavity, 24, first water hole, 25, second water hole, 26, first bearing, 27, second bearing, 28, first sealing sleeve, 30, isolation sleeve, 32, casing, 34, middle cover, 36, first water inlet joint, 37, first water inlet cavity, 38, first through hole, 40, second through hole, 42, third through hole, 44, annular protrusion, 46, first sealing ring, 48, annular groove, 50, second sealing ring, 52, second sealing sleeve, 54, second water inlet joint, 56, second water inlet cavity. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] like Figure 1 , Figure 2As shown, a cooling mechanism for a water drill comprises a casing 10 and an output shaft 12, the casing 10 is provided with a water inlet, the output shaft 12 is at least partially rotatably arranged in the casing 10, a water cavity 22 is axially arranged in the output shaft 12, one end of the water cavity 22 is closed and the other end is open, a first water hole 24 is arranged on the side wall of the output shaft 12, a sealing member is arranged on the output shaft 12, the sealing member is in sealing contact with the casing 10, the sealing member is provided with a second water hole 25, the water inlet, the second water hole 25, the first water hole 24 and the water cavity 22 are sequentially connected.

[0028] In this embodiment, the output shaft 12 is at least partially rotatably disposed in the housing 10 through the first bearing 26 and the second bearing 27. The first water hole 24 and the sealing member are both located between the first bearing 26 and the second bearing 27, which is easy to install and has good sealing performance.

[0029] In this embodiment, the sealing member includes two first sealing sleeves 28 arranged opposite to each other in the axial direction and an isolation sleeve 29 arranged between the two first sealing sleeves 28. The two first sealing sleeves 28 are both sleeved on the outer wall of the output shaft 12. The outer wall of each first sealing sleeve 28 is in sealing contact with the housing 10, and the inner wall of each first sealing sleeve 28 is in sealing contact with the output shaft 12. The second water hole 25 is arranged on the isolation sleeve 29. By arranging the sealing member into a split type to cooperate with the isolation sleeve 29, after long-term use, only the isolation sleeve 29 needs to be replaced, thereby saving replacement costs.

[0030] Furthermore, at least one third water hole 30 is provided on the side wall of the isolation sleeve 29, and at least one fourth water hole 31 is provided on the side wall of the output shaft 12. The fourth water hole 31 is respectively connected to the water cavity 22 and the corresponding third water hole 30. When the water flow is too large and the local water pressure is high, the water can flow into the fourth water hole 31 along the third water hole 30 and then enter the water cavity 22, thereby preventing water from flowing out of the first sealing sleeve 28.

[0031] Furthermore, the casing 10 includes a shell body 32 and a middle cover 34 matched with the shell body 32. The first bearing 26 is arranged in the shell body 32, and the second bearing 27 and the water inlet are both arranged in the middle cover 34. The outer wall of the first sealing sleeve 28 is in sealing contact with the middle cover 34. The casing 10 is arranged in a split type, which can facilitate the installation of the first bearing 26, the second bearing 27 and the output shaft 12.

[0032] The first bearing 26 preferably adopts a bearing with a 2RS sealing cover. It is further preferred that the inner ring of the first bearing 26 and the output shaft 12 are transition fit, but not limited to transition fit, and can also be an interference fit or a clearance fit, and the outer ring of the first bearing 26 and the housing 32 are interference fit, but not limited to interference fit, and can also be a transition fit or a clearance fit. It is preferred that the second bearing 27 is a needle bearing. It is further preferred that the inner ring of the second bearing 27 and the output shaft 12 are clearance fit, and the outer ring of the second bearing 27 and the middle cover 34 are interference fit.

[0033] In this embodiment, the water inlet part includes a first water inlet joint 36, in which a first water inlet cavity 37 is arranged. The first water inlet joint 36 is threadedly connected to the middle cover 34, thereby improving the rapidity of installation and the stability of connection of the first water inlet joint 36 and the middle cover 34.

[0034] Specifically, a stepped hole is provided in the middle cover 34, including a first through hole 38, a second through hole 40 and a third through hole 42 which are connected in sequence, and the apertures of the first through hole 38, the second through hole 40 and the third through hole 42 decrease in sequence, and an annular protrusion 44 is provided on the first water inlet joint 36, and the annular protrusion 44 fits in the first through hole 38.

[0035] In order to improve the sealing between the first water inlet joint 36 and the middle cover 34 and ensure that water flows into the first water inlet cavity 37 , a first sealing ring 46 is provided between the annular protrusion 44 and the middle cover 34 .

[0036] Specifically, an annular groove 48 is provided in the annular protrusion 44 , and the first sealing ring 46 is placed in the annular groove 48 . The first sealing ring 46 is in sealing contact with the middle cover 34 .

[0037] In order to improve the sealing between the housing 32 and the middle cover 34 , a second sealing ring 50 is disposed between the housing 32 and the middle cover 34 .

[0038] When this embodiment is in use, the water source equipment is connected through the first water inlet joint 36, and the water source enters the first water inlet cavity 37, the third through hole 42, the second water hole 25, the first water hole 24, and the water cavity 22 in sequence, and is sprayed out from the front end of the output shaft 12, thereby cooling the drill bit installed on the front end of the output shaft 12 and flushing out debris in the drill bit.

[0039] Embodiment 2

[0040] like Figure 3 As shown, the difference between the second embodiment and the first embodiment is that the sealing member includes a second sealing sleeve 52, the second sealing sleeve 52 is sleeved on the outer wall of the output shaft 12, and the second water hole 25 is provided on the side wall of the second sealing sleeve 52. Specifically, the outer wall of the second sealing sleeve 52 is in sealing contact with the middle cover 34, and the inner wall of the second sealing sleeve 52 is in sealing contact with the outer wall of the output shaft 12.

[0041] Furthermore, at least one fifth water hole 54 is provided on the side wall of the second sealing sleeve 52, and at least one sixth water hole 56 is provided on the side wall of the output shaft 12. The sixth water hole 56 is respectively connected to the water cavity 22 and the corresponding fifth water hole 54. When the water flow is too large and the local water pressure is high, the water can flow into the sixth water hole 56 along the fifth water hole 54 and then enter the water cavity 22, thereby preventing water from flowing out of the second sealing sleeve 52.

[0042] When this embodiment is in use, the water source equipment is connected through the first water inlet joint 36, and the water source enters the first water inlet cavity 37, the third through hole 42, the second water hole 25, the first water hole 24, and the water cavity 22 in sequence, and is sprayed out from the front end of the output shaft 12, thereby cooling the drill bit installed on the front end of the output shaft 12 and flushing out debris in the drill bit.

[0043] Embodiment 3

[0044] like Figure 4 As shown, the difference between the third embodiment and the second embodiment is that the water inlet portion includes a second water inlet connector 58 , a second water inlet cavity 60 is disposed in the second water inlet connector 58 , and the second water inlet connector 58 is integrally formed with the middle cover 34 .

[0045] When this embodiment is in use, the water source equipment is connected through the second inlet joint 58, and the water source enters the second water inlet cavity 60, the second water hole 25, the first water hole 24, and the water cavity 22 in sequence, and is sprayed out from the front end of the output shaft 12, thereby cooling the drill bit installed on the front end of the output shaft 12 and flushing out the debris in the drill bit.

[0046] An embodiment of the present invention further provides a water drill, comprising the cooling mechanism for the water drill provided in the above embodiment.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cooling mechanism for a water drill, It is characterized in that The invention comprises a casing and an output shaft, wherein the casing is provided with a water inlet, the casing comprises a shell body and a middle cover matched with the shell body, the output shaft is at least partially rotatably arranged in the casing through a first bearing and a second bearing, the first bearing is arranged in the shell body, the second bearing and the water inlet are both arranged in the middle cover, a water-passing cavity is axially arranged in the output shaft, one end of the water-passing cavity is closed and the other end is open, a first water-passing hole is arranged on the side wall of the output shaft, a sealing member is arranged on the output shaft, the first water-passing hole and the sealing member are both located between the first bearing and the second bearing, the sealing member is in sealing contact with the casing, and the sealing member is provided with a second water-passing hole, The water inlet, the second water hole, the first water hole, and the water cavity are sequentially connected, the sealing member comprises two first sealing sleeves arranged opposite to each other in the axial direction, and an isolation sleeve arranged between the two first sealing sleeves, the two first sealing sleeves are sleeved on the outer wall of the output shaft, the outer wall of each first sealing sleeve is in sealing contact with the housing, and the inner wall of each first sealing sleeve is in sealing contact with the output shaft, the second water hole is arranged on the side wall of the isolation sleeve, at least one third water hole is also arranged on the side wall of the isolation sleeve, and at least one fourth water hole is also arranged on the side wall of the output shaft, and the fourth water hole is respectively connected with the water cavity and the corresponding third water hole; The water inlet portion includes a first water inlet joint, a first water inlet cavity is provided in the first water inlet joint, and the first water inlet joint is threadedly connected to the middle cover, or The water inlet portion includes a second water inlet joint, a second water inlet cavity is arranged in the second water inlet joint, and the second water inlet joint is integrally formed with the middle cover.

2. The cooling mechanism for a water drill according to claim 1, It is characterized in that The sealing element comprises a second sealing sleeve, the second sealing sleeve is sleeved on the outer wall of the output shaft, and the second water hole is arranged on the side wall of the second sealing sleeve.

3. The cooling mechanism for a water drill according to claim 2, It is characterized in that At least one fifth water hole is further provided on the side wall of the second sealing sleeve, and at least one sixth water hole is further provided on the side wall of the output shaft. The sixth water hole is respectively connected to the water cavity and the corresponding fifth water hole.

4. A rhinestone, It is characterized in that The invention comprises a cooling mechanism for a water drill as claimed in any one of claims 1 to 3.

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