CN204636577U

CN204636577U - The head of dental handpiece

Info

Publication number: CN204636577U
Application number: CN201520329083.9U
Authority: CN
Inventors: 刘强; 刘兴专
Original assignee: Chi Kang Medical Device Co Ltd Of Foshan City
Current assignee: Chi Kang Medical Device Co Ltd Of Foshan City
Priority date: 2015-05-19
Filing date: 2015-05-19
Publication date: 2015-09-16
Anticipated expiration: 2025-05-19

Abstract

The utility model discloses a kind of head of dental handpiece, comprise bearing, the first shock absorbing ring, the second shock absorbing ring and bearing block, bearing is positioned at bearing block, first shock absorbing ring and the second shock absorbing ring are all sheathed on bearing, bearing is provided with L-type groove, the cell wall of the first shock absorbing ring and L-type groove offsets, and the outer wall of the second shock absorbing ring and bearing offsets.First shock absorbing ring provides axially and radial buffering for bearing, and the second shock absorbing ring provides radial buffering for bearing, and shaft strength is even, lifting surface area is large, reduces bear vibration, can reduce the operation noise of dental handpiece, and the service life of raising bearing.

Description

The head of dental handpiece

Technical field

This utility model relates to medical apparatus and instruments, particularly a kind of head of dental handpiece.

Background technology

In the middle of current existing technology, as shown in Figure 1, the bearing of dental handpiece heads inside is all the vibration that shell fragment 8 that the rubber ring 9 established by bearing block inwall slot and bottom surface are established controls its periphery, thus controls bearing owing to vibrating the displacement of axis and the radial direction caused.But, shell fragment 8 only with a side contacts of bearing, both contacts area are little, and shaft strength is uneven.The turn up 20 ~ 400,000 revs/min of height dental handpiece, bearing high speed rotating, shaft strength is slightly uneven, then produce larger noise, affects the use of dental handpiece.The head inner bearing diameter only 6mm of dental handpiece, long-term unbalance stress is fragile.

Utility model content

The purpose of this utility model is to provide the head of dental handpiece of a kind of low noise, bearing long service life.

For achieving the above object, according to an aspect of the present utility model, provide a kind of head of dental handpiece, comprise bearing, the first shock absorbing ring, the second shock absorbing ring and bearing block, bearing is positioned at bearing block, and the first shock absorbing ring and the second shock absorbing ring are all sheathed on bearing, and bearing is provided with L-type groove, the cell wall of the first shock absorbing ring and L-type groove offsets, and the outer wall of the second shock absorbing ring and bearing offsets.Thus, the first shock absorbing ring provides axially and radial buffering for bearing, and the second shock absorbing ring provides radial buffering for bearing, and shaft strength is even, lifting surface area is large, reduces bear vibration, can reduce the operation noise of dental handpiece, and the service life of raising bearing.

In some embodiments, bearing block inwall is provided with the first groove and the second groove, and the first shock absorbing ring is positioned at the first groove, and the second shock absorbing ring is positioned at the second groove.Thus, two shock absorbing rings are installed in groove, prevent shock absorbing ring to be shifted.

In some embodiments, the head of dental handpiece also comprises central shaft, bearing, the first shock absorbing ring, the second shock absorbing ring and bearing block comprise two groups, and are divided into the two ends of central shaft, the position specular of two groups of bearings, the first shock absorbing ring, the second shock absorbing ring and bearing blocks.Thus make two bearings can both uniform force, and then realize the support to central shaft.

In some embodiments, the first shock absorbing ring is near the end of central shaft, and the second shock absorbing ring is away from the end of central shaft.Thus make two the first shock absorbing rings to bearing provider to relative axial force, prevent the end face of bearing and bearing block from colliding, reduce the noise of head further.

In some embodiments, the head of dental handpiece also comprises housing, and bearing, the first shock absorbing ring, the second shock absorbing ring and bearing block are all positioned at housing, and bearing block is fixedly connected with housing.Thus, housing is played a supporting role to bearing block.

The beneficial effects of the utility model are: the first shock absorbing ring of dental handpiece heads provides axially and radial buffering for bearing, second shock absorbing ring cushions for bearing provides radial, shaft strength is even, lifting surface area is large, reduce bear vibration, the operation noise of dental handpiece can be reduced, and improve the service life of bearing.

Accompanying drawing explanation

Fig. 1 is the structural representation that the head inner bearing of dental handpiece in prior art is installed;

Fig. 2 is the structural representation of the head of the dental handpiece of this utility model one embodiment;

The head that Fig. 3 is dental handpiece shown in Fig. 1 removes the structural representation after bearing and shock absorbing ring;

Fig. 4 is the structural representation of the bearing of the head of dental handpiece shown in Fig. 1.

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in further detail.

Fig. 2 ~ 4 show schematically show the head of the dental handpiece according to a kind of embodiment of the present utility model.

As shown in Figure 2, the head of the dental handpiece of present embodiment comprises bearing 1, first shock absorbing ring 2, second shock absorbing ring 3 and bearing block 4.Bearing 1 is positioned at bearing block 4, and the first shock absorbing ring 2 and the second shock absorbing ring 3 are all sheathed on bearing 1.First shock absorbing ring 2 and the second shock absorbing ring 3 are O type circle, and are quality of rubber materials.

As shown in Figure 3, bearing block 4 inwall is provided with the first groove 41 and the second groove 42, first shock absorbing ring 2 and is positioned at the first groove 41, second shock absorbing ring 2 and is positioned at the second groove 42.

As shown in Figure 4, bearing 1 is provided with L-type groove 11, first shock absorbing ring 2 and offsets with the cell wall of L-type groove 11, and the second shock absorbing ring 3 offsets with the outer wall of bearing 1.L-type groove 11 is located at the outer wall of bearing 1, makes bearing 1 form different two sections of diameter.

The head of the dental handpiece of present embodiment also comprises central shaft 5, bearing 1, first shock absorbing ring 2, second shock absorbing ring 3 and bearing block 4 comprise two groups, and being divided into the two ends of central shaft 5, two groups of bearing 1, first shock absorbing ring 2, second shock absorbing rings 3 and bearing block 4 specular are arranged.Bearing 1 is sheathed on central shaft 5, and is fixedly connected with central shaft 5.The holder being used for clamping trolley pin is set in central shaft 5, between two bearings 1, also wind wheel is set.

First shock absorbing ring 2 is near the end of central shaft 5, and the second shock absorbing ring 3, away from the end of central shaft 5, makes two the first shock absorbing rings, 2 couples of bearing 1 providers to relative axial force, prevents the end face of bearing 1 and bearing block 4 from colliding, and reduces the noise of head further.

The head of the dental handpiece of present embodiment also comprises housing 6, and bearing 1, first shock absorbing ring 2, second shock absorbing ring 3 and bearing block 4 are all positioned at housing 6, and bearing block 4 is fixedly connected with housing 6.Housing 6 comprises main body 61 and bonnet 62, bearing block 4 is connected with bonnet 62 interference, and another bearing block 4 is integral type structure with main body 61.

In use, bearing 1 centre of support axle 5 high speed rotating, the first shock absorbing ring 2 and the second shock absorbing ring 3 provide axially and radial buffering for bearing 1 head of the dental handpiece of present embodiment, effectively reduce bearing 1 and vibrate, reduce the noise of dental handpiece.

Above-described is only embodiments more of the present utility model.For the person of ordinary skill of the art, under the prerequisite not departing from this utility model creation design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. the head of dental handpiece, it is characterized in that, comprise bearing (1), the first shock absorbing ring (2), the second shock absorbing ring (3) and bearing block (4), described bearing (1) is positioned at bearing block (4), described first shock absorbing ring (2) and the second shock absorbing ring (3) are all sheathed on bearing (1), described bearing (1) is provided with L-type groove (11), described first shock absorbing ring (2) offsets with the cell wall of L-type groove (11), and described second shock absorbing ring (3) offsets with the outer wall of bearing (1).

2. the head of dental handpiece according to claim 1, it is characterized in that, described bearing block (4) inwall is provided with the first groove (41) and the second groove (42), described first shock absorbing ring (2) is positioned at the first groove (41), and described second shock absorbing ring (3) is positioned at the second groove (42).

3. the head of dental handpiece according to claim 1 and 2, it is characterized in that, also comprise central shaft (5), described bearing (1), the first shock absorbing ring (2), the second shock absorbing ring (3) and bearing block (4) comprise two groups, and be divided into the two ends of central shaft (5), the position specular of bearing (1), the first shock absorbing ring (2), the second shock absorbing ring (3) and bearing block (4) described in two groups.

4. the head of dental handpiece according to claim 3, is characterized in that, described first shock absorbing ring (2) is near the end of central shaft (5), and described second shock absorbing ring (3) is away from the end of central shaft (5).

5. the head of dental handpiece according to claim 1 and 2, it is characterized in that, also comprise housing (6), described bearing (1), the first shock absorbing ring (2), the second shock absorbing ring (3) and bearing block (4) are all positioned at housing (6), and described bearing block (4) is fixedly connected with housing (6).