CN216933513U - Lid and dental handpiece behind canned type - Google Patents
Lid and dental handpiece behind canned type Download PDFInfo
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- CN216933513U CN216933513U CN202123028120.7U CN202123028120U CN216933513U CN 216933513 U CN216933513 U CN 216933513U CN 202123028120 U CN202123028120 U CN 202123028120U CN 216933513 U CN216933513 U CN 216933513U
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- bearing seat
- pressing cover
- cover
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Abstract
The present case provides a lid behind canned type, including push down cap, push down cap retaining member, sealed pad, spring and bearing frame. The first end and the aircraft nose shell of bearing frame are connected, and the second end forms first sealed position with the junction of press cover retaining member, and the second end forms the sealed position of second with the junction of press cover. The spring provides an elastic supporting force between the bearing seat and the press cover. The doctor can press the press cover when the oiling, opens the sealed route of the first sealed position of back lid, and lubricating oil can be in the inside quick free flow of core to let lubricating oil conveniently flow and accomplish the lubrication to each inside part of core, also can discharge original old lubricating oil, and because the sealed position of second remains sealed state all the time, the outside normal saline of cell-phone and blood can not enter into the aircraft nose inside and lead to bearing and gear to rust or even inefficacy. The scheme also provides a dental handpiece with the sealed rear cover.
Description
Technical Field
The utility model belongs to the technical field of dental medical instruments, and particularly relates to a sealed rear cover and a dental handpiece.
Background
In the prior art, a dental handpiece is used for maintaining and repairing teeth. The dental handpiece is used in the oral cavity, and is exposed to water, bloodstain, bacteria and other pollutants for a long time, so that the dental handpiece needs to be cleaned, sterilized and maintained after being used, but cannot be prevented from being invaded by water and impurities. In order to protect important parts such as core gears, spring blades and bearings in dental handpieces from contamination and corrosion, the back cover must be tightly sealed.
The prior sealing technology of the dental handpiece is that a sealing ring is in contact type sealing with a working rotating shaft, and the existing defects are as follows: first, it is difficult to control the dimensional accuracy of the sealing rubber gasket to ensure a proper clearance with the rotating member; secondly, after the dental handpiece is used for a period of time, the sealing performance of the dental handpiece is reduced due to the abrasion of the sealing rubber gasket (the dental handpiece with particularly high rotating speed is particularly obvious); thirdly, after the sealing is completely carried out, the lubricating oil cannot be sprayed out of the rear cover after being injected from the tail end of the bending machine, the lubricating oil cannot be injected into all parts inside the bending machine, and the bending machine is likely to fall and be damaged due to the overlarge internal pressure of the bending machine in the oil injection process; fourthly, if the back cover is not sealed or the seal fails, the normal saline and blood in the operation process can enter the handpiece, and untimely cleaning can lead to rusting and failure of the bearing and the gear, thereby shortening the service life of the dental handpiece.
Therefore, how to overcome the above technical defects is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sealing type rear cover and a dental handpiece, which can effectively improve the sealing performance of the sealing type rear cover, effectively protect a handpiece movement assembly of the dental handpiece and prolong the service life.
In order to solve the above technical problems, the present invention provides a sealing rear cap, comprising a pressing cap, a pressing cap locking member, a sealing gasket, a spring, and a bearing seat, wherein,
the bearing seat is of a cylindrical structure with openings at two ends, the first end of the bearing seat is detachably connected to the opening of the rear cover of the machine head shell, and the second end of the bearing seat comprises a first sealing position located on the inner ring and a second sealing position located on the outer ring;
the outer edge of the locking piece of the pressing cover is provided with a limiting shaft shoulder, and the limiting shaft shoulder is abutted against the first sealing position to seal the machine head core;
after assembly, the pressing cover is sleeved on the pressing cover locking part and is connected with the second sealing position;
two ends of the spring are respectively abutted against the bearing seat and the pressing cover;
when the dental handpiece works, the spring provides elastic supporting force for the pressing cover, so that the locking piece of the pressing cover is abutted against the first sealing position to realize sealing; when the dental handpiece needs oil injection cleaning maintenance, the pressing cover is pressed, and the pressing cover locking piece is separated from the first sealing position to form a passage for discharging cleaning lubricating oil.
Optionally, a sealing gasket is arranged between the limiting shaft shoulder and the first sealing position.
Optionally, the pressing cover is provided with a receiving cavity for inserting the locking member of the pressing cover.
Optionally, the pressing cover and the pressing cover locking member are connected into a whole in an interference fit, adhesive bonding, threaded connection or welding manner.
Optionally, the pressing cover is a cylindrical cover body, and the second sealing position of the bearing seat is tightly attached to the annular side wall of the cylindrical cover body.
Optionally, an annular groove is formed in the circumferential direction of the side, opposite to the bearing seat, of the pressing cover, and a first O-shaped sealing ring is arranged in the annular groove.
Optionally, an annular groove is formed in the circumferential direction of the opposite side of the bearing seat and the handpiece shell, and a second O-shaped sealing ring is arranged in the annular groove.
Optionally, the pressing cover locking member, the bearing seat and the handpiece shell are coaxially arranged.
The utility model also provides a dental handpiece comprising a sealed rear cover as described above.
Optionally, the device further comprises a rotating shaft, a bearing and a machine head shell, wherein the bearing and the machine head shell are sequentially sleeved on the rotating shaft from inside to outside.
The utility model provides a sealed rear cover, which has the following beneficial effects:
the first end and the aircraft nose shell of bearing frame are connected, and the second end forms first sealed position with the junction of press cover retaining member, and the second end forms the sealed position of second with the junction of press cover. The spring provides an elastic supporting force between the bearing seat and the press cover. The doctor can press the press cover when the oiling, opens the sealed route of the first sealed position of back lid, and lubricating oil can be in the inside quick free flow of core to let lubricating oil conveniently flow and accomplish the lubrication to each inside part of core, also can discharge original old lubricating oil, and because the sealed position of second remains sealed state all the time, the outside normal saline of cell-phone and blood can not enter into the aircraft nose inside and lead to bearing and gear to rust or even inefficacy. Above-mentioned setting can effectively improve the sealing performance of lid behind the canned type, has protected dental handpiece aircraft nose core assembly effectively, increase of service life.
The dental handpiece provided by the utility model is provided with the sealing type rear cover, so that the dental handpiece also has the beneficial effects, and the description is omitted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a sealed rear cover according to the present invention;
fig. 2 is a partial enlarged view at I in fig. 1.
In the upper diagram:
1-pressing a cover; 2-pressing the cap locking member; 3-a sealing gasket; 4-a first O-ring seal; 5-a spring; 6-a second O-shaped sealing ring; 7-bearing seats; 8-a bearing; 9-handpiece shell; 10-axis of rotation.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is more than two, if there are first and second described for the purpose of distinguishing technical features, but not for indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
The core of the utility model is to provide the sealed rear cover and the dental handpiece, which can effectively improve the sealing performance of the sealed rear cover, effectively protect the core assembly of the handpiece of the dental handpiece and prolong the service life.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a sealed rear cover which comprises a pressing cover 1, a pressing cover locking piece 2, a sealing gasket 3, a spring 5 and a bearing seat 7.
Wherein, bearing frame 7 is the tubular structure of both ends open-ended, and the first end of bearing frame 7 can be dismantled and connect in aircraft nose shell 9 back lid opening department, and the cover is located on the bearing 8 of axis of rotation 10, and the second end is including the first sealed position that is located the inner ring and the second sealed position that is located the outer loop.
The outer fringe of press cover retaining member 2 is provided with spacing shaft shoulder, spacing shaft shoulder and first sealed position butt to sealed aircraft nose core prevents that the press cover from upwards deviating from the bearing frame.
After assembly, the pressing cover 1 is sleeved on the pressing cover locking part 2, and the pressing cover 1 is connected with the second sealing position.
Both ends of the spring 5 abut against the bearing seat 7 and the pressing cover 1, respectively, for providing a pressing elastic force and an elastic supporting force.
When the dental handpiece is operated, the spring 5 provides elastic supporting force for the pressing cover 1, so that the locking piece 2 of the pressing cover is abutted against the first sealing position to realize sealing. That is, spring 5 compresses in the space that bearing frame 7 and press cap 1 formed, and the elastic support power that produces makes and has the trend that the direction removed that deviates from mutually between press cap 1 and the bearing frame 7, and under the drive of press cap 1, the spacing shaft shoulder of press cap retaining member 2 closely laminates in order to realize the sealed of inner space with the first sealed position of bearing frame 7.
When the dental handpiece needs oil injection cleaning maintenance, the pressing cap 1 is pressed, and the pressing cap locking member 2 is separated from the first sealing position to form a passage for discharging cleaning lubricating oil. At this time, the pressing cap 1 moves downward against the elastic supporting force of the spring 5, and drives the pressing cap locking member 2 to move downward, and the sealing passage between the pressing cap locking member 2 and the first sealing position is opened. When the pressing is stopped, the spring 5 restores the elastic supporting force to restore the pressing cap 1 and the pressing cap locking member 2, and the sealing is restored.
The back lid can be in opening the route or switching in sealed, can press the back lid during the oiling and open the route blowdown, and the sealed compression that fills up under the natural state, outside normal saline and impurity can't get into the inside corruption that causes of core.
According to the sealing type rear cover, the first end of the bearing seat 7 is connected with the machine head shell, the joint of the second end and the pressing cover locking piece 2 forms a first sealing position, and the joint of the second end and the pressing cover 1 forms a second sealing position. The spring 5 provides an elastic supporting force between the bearing housing 7 and the press cap 1. The doctor can press the press cover 1 when the oiling, opens the sealed route of the first sealed position of back lid, and lubricating oil can be in the inside quick free flow of core to let lubricating oil conveniently flow and accomplish the lubrication to each inside part of core, also can discharge original old lubricating oil, and because the sealed position of second remains sealed state all the time, the outside normal saline of cell-phone and blood can not enter into the aircraft nose inside and lead to bearing and gear to rust or even inefficacy. Above-mentioned setting can effectively improve the sealing performance of lid behind the canned type, has protected dental handpiece aircraft nose core assembly effectively, increase of service life.
In order to improve the sealing effect, a sealing gasket 3 is arranged between the limiting shaft shoulder and the first sealing position. The contact positions of the pressing cover locking piece 2 and the bearing seat 7 are like two barb structures, and the pressing cover locking piece and the bearing seat are tightly hooked and connected under the action of the spring 5 to form axial limiting.
In the embodiment, the pressing cap 1 is provided with a receiving cavity for inserting the locking member 2.
Before the assembly, press cap 1 and press cap retaining member 2 are for dividing the body structure, are convenient for install in proper order. During assembly, the pressing cover 1 and the pressing cover locking part 2 are connected into a whole in the modes of interference, glue spreading, threads, welding and the like.
In the embodiment, the pressing cap 1 is a cylindrical cap, and the second sealing position of the bearing seat 7 is tightly attached to the annular side wall of the cylindrical cap. 1 this design is compared traditional back lid, does not have back-off between gland 1 and the bearing frame 7, and the size of the up end of gland 1 can be done bigger, presses and feels better.
Furthermore, the circumference of the opposite side of the pressing cover 1 and the bearing seat 7 is provided with an annular groove, and a first O-shaped sealing ring 4 is arranged in the annular groove, so that the rear cover is completely sealed. Of course, the first O-ring 4 may not be installed. The improvement is within the protection scope of the scheme.
Further, the circumference of the opposite side of the bearing seat 7 and the machine head shell 9 is provided with an annular groove, and a second O-shaped sealing ring 6 is arranged in the annular groove and used for sealing the rear cover and the machine head shell 9.
The pressing cover 1, the pressing cover locking piece 2, the bearing seat 7 and the handpiece shell 9 are all in symmetrical structures, so that the components are coaxially arranged.
The beneficial effect of present case lies in:
1) the processing mode of contact sealing is not needed, and the size precision of the sealing rubber gasket is strictly controlled. The precision requirement and the processing difficulty of the dental handpiece on the sealing rubber pad are reduced, so that the cost is reduced;
2) the sealing rubber gasket is positioned in the rear cover and does not contact with the rotating shaft, so that the problem of abrasion of a sealing rubber strip is solved, the sealing performance is long-term and reliable, and the sealing rubber gasket can be used for a high-speed mobile phone;
3) when the back cover is pressed during oil injection, the sealing passage of the back cover is opened, the lubricating oil can rapidly and freely flow in the core, and the operability and convenience of oil injection and lubrication of the core can be improved.
Based on the three points, the sealing structure effectively protects the core assembly of the bending machine head, prolongs the service life of the core assembly, ensures the long-term stable operation of the bending machine head and greatly improves the market competitiveness of the dental handpiece.
In addition, the present embodiment further provides a dental handpiece, which includes a rotating shaft 10, a bearing 8 and a handpiece housing 9 that are sleeved on the rotating shaft 10 from inside to outside, and a sealing type rear cover.
Since the dental handpiece has the sealing type rear cover, the dental handpiece has the beneficial effects brought by the sealing type rear cover, and please refer to the above contents, which are not described herein again.
Wherein, the bearing housing is located on the bearing 8 of axis of rotation 10, and bearing 8 can set up a plurality ofly, and its quantity and structure do not further limit, and any adaptability improves all in this case protection scope.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A sealed rear cover is characterized by comprising a pressing cover (1), a pressing cover locking piece (2), a sealing gasket (3), a spring (5) and a bearing seat (7), wherein,
the bearing seat (7) is of a cylindrical structure with openings at two ends, the first end of the bearing seat (7) is detachably connected to the opening of the rear cover of the machine head shell (9), and the second end of the bearing seat comprises a first sealing position located on the inner ring;
the outer edge of the pressing cover locking piece (2) is provided with a limiting shaft shoulder, and the limiting shaft shoulder is abutted against the first sealing position to seal the machine head core;
the pressing cover (1) is connected with the pressing cover locking piece (2);
two ends of the spring (5) are respectively abutted against the bearing seat (7) and the pressing cover (1);
when the dental handpiece works, the spring (5) provides elastic supporting force for the pressing cover (1) so that the pressing cover locking piece (2) is abutted against the first sealing position to realize sealing; when the dental handpiece needs oil injection and cleaning maintenance, the pressing cover (1) is pressed, and the pressing cover locking piece (2) is separated from the first sealing position to form a passage for discharging cleaning lubricating oil.
2. The sealed rear cover according to claim 1, characterized in that a sealing gasket (3) is provided between the limiting shoulder and the first sealing position.
3. Sealed rear cap according to claim 1, characterized in that the press cap (1) is provided with a receiving cavity for inserting the press cap lock (2).
4. The sealed rear cap according to any one of claims 1 to 3, wherein the press cap (1) and the press cap lock (2) are integrally connected by interference fit, gluing, screwing or welding.
5. The sealed rear cap according to any one of claims 1 to 3, wherein the push cap (1) is a cylindrical cap, and the second end of the bearing seat (7) further comprises a second sealing position located on the outer ring, the second sealing position always being in close contact with the annular side wall of the cylindrical cap.
6. The rear closure of the sealed type according to claim 5, characterized in that the pressing cap (1) is provided with an annular groove in the circumferential direction on the side opposite to the bearing seat (7), and a first O-ring seal (4) is provided in the annular groove.
7. The sealed rear cover according to claim 1, characterized in that the bearing seat (7) is provided with an annular groove in the circumferential direction on the opposite side to the nose casing (9), in which a second O-ring seal (6) is provided.
8. Sealed rear cap according to claim 1, characterized in that the press cap (1), the press cap lock (2), the bearing seat (7) and the handpiece housing (9) are arranged coaxially.
9. A dental handpiece comprising a sealed-type rear cover according to any one of claims 1 to 8.
10. A dental handpiece according to claim 9, further comprising a rotary shaft (10), a bearing (8) and a handpiece housing (9) which are sleeved on the rotary shaft (10) from inside to outside in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123028120.7U CN216933513U (en) | 2021-12-03 | 2021-12-03 | Lid and dental handpiece behind canned type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123028120.7U CN216933513U (en) | 2021-12-03 | 2021-12-03 | Lid and dental handpiece behind canned type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216933513U true CN216933513U (en) | 2022-07-12 |
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ID=82307610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123028120.7U Active CN216933513U (en) | 2021-12-03 | 2021-12-03 | Lid and dental handpiece behind canned type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216933513U (en) |
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2021
- 2021-12-03 CN CN202123028120.7U patent/CN216933513U/en active Active
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