CN1965771B

CN1965771B - Suction machine

Info

Publication number: CN1965771B
Application number: CN2006101514012A
Authority: CN
Inventors: E·农嫩马赫
Original assignee: DUHR DENTAL INSTRUMENTS KG
Current assignee: DUHR DENTAL INSTRUMENTS KG; Duerr Dental SE
Priority date: 2005-09-05
Filing date: 2006-09-05
Publication date: 2011-04-13
Anticipated expiration: 2026-09-05
Also published as: DE102005042228B4; DE102005042228A1; ITMI20061682A1; CN1965771A

Abstract

The invention relates to a suction machine having middle housing part (12) designed as hollow chamber part. A retaining space (45) for an electric motor is defined by the inner wall (44) of the hollow chamber. An annular space (54) is formed between concentric inner and outer walls (44, 52) of the middle housing part (12) and stays in connection with a periphery environment via inlet- and outlet slots (78, 82). A cup-shaped fan (56) is rotatably arranged in the annular space (54) and is attached to a motor shaft (40) with its base(60), where an outer side of a peripheral wall of the fan supports blades (68).

Description

Sucking machine

Technical field

The present invention relates to a kind of sucking machine.This class sucking machine is used for particularly producing negative pressure in medical practice and dental practice.

Background technique

This sucking machine forms as the side canal machine usually.DE 4128150A1 illustrates a kind of like this example of machine.

In this known side canal machine, an end of motor shaft is loaded with a radial fan wheel, and it is from suction air on every side and air is moved along the radiating fin that is carried on the electric machine casing outside.Be sleeved on the outside of the thin-walled enclosing cover guiding cooling air curtain on the radiating fin.

Summary of the invention

By the present invention, will so improve the sucking machine of the described type of beginning, so that also obtain a solid motor bearing, obtain guiding simultaneously to cooling blast with simple mode with less member.

According to the present invention, this purpose realizes by a sucking machine with following feature.Described sucking machine has a housing, and this housing is stipulated a working space and a motor holding space; Also has an active wheel that can in working space, rotate; With a motor that is arranged in the described motor holding space, described active wheel is worked on the axle of motor, wherein, one case member that defines the motor holding space forms the hollow chamber part at least in part, and the inner space of hollow chamber is connected with surrounding environment with at least one outlet slot by at least one inlet slot, and arrange rotatably that in the inner space of hollow chamber one can pass through the shaft-driven blower fan of motor, it is characterized by, blower fan has a blower fan body portion, described blower fan body portion is done cup-shaped, and surround the cup-shaped inwall of hollow chamber, in the described blower fan body portion outside blade is housed simultaneously.

In according to sucking machine of the present invention, the housing of a regulation motor holding space forms the hollow chamber housing around the motor holding space.Hollow chamber has at least one inlet slot and at least one outlet slot, and can guide cooling air flow thus.Thus, do not need special lid part, and also can obtain a stable especially and housing configuration that bearing capacity is arranged by the centering layout of wall in the hollow chamber scope.Improvement of the present invention also has such advantage, promptly sucking machine be built into short especially vertically, this be because, blower fan only needs very little additional space vertically, and its blade centrally around motor around layout.

Favourable improvement of the present invention provides below.

According to the present invention, housing has a plurality of inlet slots that distribute along sense of rotation; Inlet slot is equably along circumferentially distributing; The outlet slot that housing has a plurality of edges circumferentially to distribute, outlet slot are equably along circumferentially distributing; The inner space of hollow chamber and motor shaft coaxial line; There is substantially the same cross section the inner space of hollow chamber along its axial length.Improvement of the present invention is being favourable aspect the circumferential uniform cooling in the edge of motor.

According to the present invention, blade is placed on the outer surface of cup-shaped blower fan body portion.Blower fan is as axially blower fan work.

According to the present invention, the blower fan body portion is loaded with odd number of blades; Blade has a blade sections adjacent with cup-shaped bottom, that a relative Transverse plane tilts slightly respectively, with have one adjacent with the free edge of cup-shaped blade body portion and with the blade sections of comparing relative sharp Transverse plane steepening near the blade sections of cup-shaped bottom.Its advantage is to be favourable aspect the transportation performance that noise is little and blower fan is good that produces.

According to the present invention, the bottom of cup-shaped blower fan body portion is loaded with the auxiliary blade that a plurality of edges circumferentially distribute, and wherein, the number of described auxiliary blade is preferably different with the number of the blade of blower fan, preferably differs an odd number.Can realize that like this part of being surrounded by cup-shaped blower fan body portion of hollow chamber inner walls also can obtain cooling reliably.

At this moment, according to the present invention, the hole that the bottom of cup-shaped blower fan body portion has a plurality of edges circumferentially to distribute; Auxiliary blade is crooked.Its advantage is also to be favourable in the even cooling that makes progress in week.

Blower fan is that the sucking machine of cast member or die castings allows accurately to make with size especially at an easy rate, and does not need great machine finish.

According to the present invention, housing has basic shell part and two end housing parts of sealing the ends of middle case part for prismatic centre, and middle shell partly comprises two shell sections along a horizontal composition plane butt joint.Sucking machine housing with this feature allows simply to assemble with more such parts, and they can be with simple casting pattern of geometrical shape or casting die manufacturing.

Description of drawings

According to some embodiments the present invention is described in more detail below with reference to accompanying drawing.In the drawings:

Fig. 1 illustrates the axial section of the sucking machine of dental;

Fig. 2 illustrates the similar section with Fig. 1, but is positioned at the plane that turns over 45 degree;

Fig. 3 illustrates the side view that the sucking machine of Fig. 2 is looked from the right side;

Fig. 4 illustrates the view of looking from downside as the sucking machine of Fig. 1 and 2;

Fig. 5 illustrates the view of looking from the cup-shaped blower fan downside that uses the sucking machine as Fig. 1 to 4;

Fig. 6 illustrates the side view as the blower fan of Fig. 5; And

Fig. 7 illustrates the enlarged detail of fan blade downside.

Embodiment

The sucking machine that illustrates in the drawings has whole housings with 10 signs, and it has the shell part 12 in the middle of, and described shell part is prismatic substantially, and itself is made up of two

shell section

12a and 12b that dock on an inter-engagement face.

At this, " prismatic " can be understood as, and the cross section of shell part 12 only slightly changes vertically, and in an illustrated embodiment, the change of basic geometrical shape forms the groove 14 of a upward opening mainly in the upper end of shell section 12a on it.This groove is formed on the groove 16 under shed of upper casing part 18 of a lid shape and wherein rotatably arranges one on the whole with the working space 20 of the active wheels of 22 signs.

The downside of shell part 12 is made lower casing part 24 sealings of covering shape by one, and this part has four pin 26 that are used to park sucking machine.

Here need on its details, not be described in detail active wheel 22.Important only is that the blade 28 with parallel plane axial end upwards is being housed in its week.One shown in figure 2 circumferentially in the scope, blade 28 between the sealing web 30 and 32 of the shell part 12 of centre and upper casing part 18 by the sliding contact operation of sealing.The inlet 34 of sucking machine and outlet 36 (referring to Fig. 4) are positioned at a side or the opposite side of sealing web 30,32.

Active wheel 22 is tightened in securely by screw 38 and belongs on the last free end of integral body with the motor shaft 40 of 42 motors that indicate.This motor is arranged in the inside of the wall 44 that radially is positioned at the inside of housing 10, and this wall forms by wall section 44a, the 44b that is arranged on shell section 12a and the 12b.Wall 44 defines a motor holding space 45.

Stop being loaded with bearing 48,50 on the diapire 46a of wall section 44a and 44b and the 46b in the upper and lower, motor shaft 40 is bearing in the described bearing.Shell part 12 has a concentric cylindrical outer wall 52 by same radial distance surrounding wall 44 ground, and this outer wall is also formed by two wall section 52a, 52b that belong to

shell section

12a and 12b respectively.

Wall 44 and 52 defines an annular space 54 jointly, and by this space, whole blower fans with 56 signs rotate cooling air circulation.

Blower fan 56 comprises a cup-shaped blower fan body portion 58, and this part has one to be positioned at the bottom 60 of the below of diapire 46b with little spacing.The circumferential wall 62 of bottom 60 supporting blower fan body portions 58, this circumferential wall surrounds wall 44b with little radial spacing.

On the border surface above it is positioned in Fig. 2, shown in Fig. 5, bottom 60 is loaded with the circumferentially blade 64 of the bending of distribution of six edges.These blades are provided with along the ground that circumferentially distributes equably, and between its root section, be respectively equipped with the hole 66 of a circle, blower fan 56 can be by described hole to cup-shaped inboard suction air, so this air just flows through between the outer surface of the internal surface of blower fan body portion 58 and wall 44b.

The outside of cup-shaped blower fan body portion 58 carries five circumferential equally distributed blades 68 in edge, and they are along extending on the major part of the outer surface of body portion 58.

Because the difference of the number of selection blade 64 and the number of blade 68 equals odd number (being) herein, so obtain the especially quietly operation of blower fan 56.

At this, blade 68 have one with bottom 60 adjacent vanes sections 70, its slightly tilts (being about 5 ° in an embodiment) with the Transverse plane of the axis normal of motor shaft 40 with respect to one.From the end of bottom side, the gradient of blade 68 continues to increase, and at the free edge of cup-shaped blower fan body portion, blade 68 has one to be about 45 ° gradient.This blade sections indicates with 72 in the drawings.

As can be seen from fig. 7, the lower end surface of blade 68 is respectively as with shown in 74 being (angefast) of chamfered edge.

Lower casing part 24 has a frusto conical wall section, and it has the circumferentially equally distributed inlet slot 78 that is used for cooling air of a plurality of edges, and these grooves radially align with annular space 54.Shell section 12a also be provided with a plurality of upper limbs with lower part 12b limit outlet slot 82 to the edge of under shed dimple 80.

At this moment, one of two outlet slots 82 will so be placed, so that it leads to the outside that is placed in housing 10 and the inside of admitting the terminal box 83 of the electric control device 84 that is used for motor 42.

From top description as can be seen, by blower fan 56 is set, the axial dimension of sucking machine only is slightly larger than installs motor 42 needed spaces.Can also find out further that the outside of diapire 46b and wall 44b is by blade 64 coolings, blade 68 then is used for washing annular space 54 on a large scale with cool air.In this way, motor 42 is protected reliably, and is overheated to prevent.

Find out also that further housing 10 integral body have only a spot of part, i.e. upper casing part 18, two

shell section

12a and 12b, and lower casing part 24.These shells partly pass through flange 86, the 88 reliably and simply combinations of usefulness clamping bolt 90 of upper casing part 18 and lower casing part 24.

Each shell partly allows to make under the situation of casting pattern that adopts geometrical shape to build simply or casting die respectively.

The installation of machine is very simple.At first motor 42 is inserted between two shell section 12a and the 12b, then active wheel 22 usefulness screws is screwed on the upper end of motor shaft 40, and from below cup-shaped blower fan 58 being pushed on the motor shaft 40, and fix with pressing, welding or alternate manner at this place.Put lower casing part 24 then, and each shell part is connected each other securely by clamping bolt 90.

Claims

1. sucking machine has a housing (10), and this housing is stipulated a working space (20) and a motor holding space (45); Also has an active wheel (22) that can in working space (20), rotate; With a motor (42) that is arranged in the described motor holding space (45), described active wheel (22) is gone up work at the axle (40) of motor, wherein, one case member (12) that defines motor holding space (45) forms the hollow chamber part at least in part, and the inner space of hollow chamber is connected with surrounding environment with at least one outlet slot (82) by at least one inlet slot (78), and arrange rotatably that in the inner space (54) of hollow chamber one can pass through the blower fan (56) that motor shaft (40) drives, it is characterized by, blower fan (56) has a blower fan body portion (58), described blower fan body portion is done cup-shaped, and the cup-shaped inwall (44b of encirclement hollow chamber, 46b), in described blower fan body portion (58) outside blade (68) is housed simultaneously.

2. sucking machine as claimed in claim 1 is characterized by, and housing (10) has a plurality of inlet slots (78) that distribute along sense of rotation.

3. sucking machine as claimed in claim 2 is characterized by, and inlet slot (78) is equably along circumferentially distributing.

4. sucking machine as claimed in claim 1 is characterized by, the outlet slot (82) that housing (10) has a plurality of edges circumferentially to distribute.

5. sucking machine as claimed in claim 4 is characterized by, and outlet slot (82) is equably along circumferentially distributing.

6. sucking machine as claimed in claim 1 is characterized by, the inner space of hollow chamber (54) and motor shaft (40) coaxial line.

7. sucking machine as claimed in claim 1 is characterized by, and the inner space of hollow chamber (54) have substantially the same cross section along its axial length.

8. sucking machine as claimed in claim 1 is characterized by, and blade (68) is placed on the outer surface of cup-shaped blower fan body portion (58).

9. sucking machine as claimed in claim 1 is characterized by, and blower fan body portion (58) is loaded with odd number of blades (68).

10. sucking machine as claimed in claim 1, it is characterized by, blade (68) has a blade sections (70) adjacent with cup-shaped bottom, that a relative Transverse plane tilts slightly respectively, with have one adjacent with the free edge of cup-shaped blade body portion (58) and with the blade sections (72) of comparing relative sharp Transverse plane steepening near the blade sections (70) of cup-shaped bottom.

11. sucking machine as claimed in claim 1 is characterized by, the bottom (60) of cup-shaped blower fan body portion (58) is loaded with the auxiliary blade (64) that a plurality of edges circumferentially distribute.

12. the sucking machine as claim 11 is characterized by, the number of described auxiliary blade is different with the number of the blade (68) of blower fan (56).

13. the sucking machine as claim 12 is characterized by, the number of the blade (68) of the number of described auxiliary blade and blower fan (56) differs odd number.

14. the sucking machine as claim 11 is characterized by, the hole (60) that the bottom (60) of cup-shaped blower fan body portion (58) has a plurality of edges circumferentially to distribute.

15. the sucking machine as claim 11 is characterized by, auxiliary blade (64) is crooked.

16. sucking machine as claimed in claim 4 is characterized by, blower fan (56) is cast member or die castings.

17. sucking machine as claimed in claim 1, it is characterized by, housing (10) has basic shell part (12) and two end housing parts (18,24) of sealing the ends of middle case part for prismatic centre, and middle shell part (12) comprises two shell sections (12a, 12b) of docking along a horizontal composition plane.