CN2281441Y

CN2281441Y - Gear bearing

Info

Publication number: CN2281441Y
Application number: CN 96237911
Authority: CN
Inventors: 朱绍仁
Original assignee: HUBEI MECHANO-ELECTRICAL INST
Current assignee: HUBEI MECHANO-ELECTRICAL INST
Priority date: 1996-12-26
Filing date: 1996-12-26
Publication date: 1998-05-13
Anticipated expiration: 2006-12-26

Abstract

The utility model relates to a drive bearing which is used for forward and backward speed increasing and reducing movement between an input and an output shafts. The utility model comprises an eccentric mechanism, an inner gear ring and a drive ring positioned between the eccentric mechanism and the inner gear ring. In order to compensate axiality error and eliminate the excitation source under an operating condition, a rolling bearing arranged on an eccentric zone is a spherical face rolling bearing, and an eccentric sleeve is provided with a balance weight dynamic balance block arranged correspondingly to the eccentric zone.

Description

Drive bearing

The utility model relates to a kind of mechanical transmission bearing, in particular for the drive bearing of the fast transmission of forward and reverse increase and decrease between input and the output shaft.

Chinese patent 87206687.8 discloses a kind of drive bearing, it comprises: eccentric stiffener, ring gear and the transmission circle between the two, along the transmission circle some radially guide grooves are arranged, drive link is arranged in the guide groove, the off-centre of eccentric stiffener is with the concentric zone and the eccentric district of its endoporus rotational axis relatively, the rolling element at drive link two ends is meshed with ring gear and the rolling bearing that is arranged on eccentric district respectively, between concentric zone and the transmission circle rolling element is housed.Problem is: when 1, assembling, the coaxality between input shaft and the eccentric bushing often needs higher processing and assembling precision to guarantee, so be an impediment to the reduction manufacture cost; 2, must have on the structure eccentric district (single eccentric structure) the quality skew distribution that must cause, as the member that rotatablely moves, it is the main vibrating source that causes vibration.

For this reason, the purpose of this utility model provides a kind of drive bearing, and it can not only compensate the coaxiality error between input shaft and the eccentric bushing voluntarily, and, can eliminate the vibrating source under the operating conditions.

The technological scheme that realizes the utility model purpose is when comprising aforementioned formation, and its distinctive feature is, the rolling bearing that is arranged on eccentric district is a spherical rolling bearing, and, an eccentric relatively district is arranged and the counterweight dynamic balancing piece that is provided with on the eccentric bushing.

And the shoulder of eccentric bushing concentric zone cooperates the interior boss of transmission circle both sides end cap to play the axial position that restriction is contained in the rolling bearing of concentric zone, and ring gear is installed between the both sides end cap of transmission circle.

In the above-described configuration, because being arranged on the rolling bearing in eccentric district is spherical rolling bearing, so, inevitable between the two coaxiality error, just can come compensating coaxial degree error around the slippage (slip direction is perpendicular to the rotating direction of rolling element) of its sphere shape raceway groove by this bearing roller, thereby needn't be too overcritical to its coaxality, be beneficial to reduce manufacture cost; Again because the counterweight dynamic balancing piece that has an eccentric relatively district to be provided with, so just can eliminate the vibrating source that the quality skew distribution because of eccentric bushing exists effectively, so that further improve the complete machine operating conditions.

The utility model is described in further detail below with reference to accompanying drawing.

Fig. 1 is the integrally-built sectional view of this drive bearing.

Fig. 2 is the sectional view of eccentric bushing.

Fig. 3 is the right elevation of Fig. 2.

With reference to Fig. 1～Fig. 3, this device comprises eccentric stiffener 1, ring gear 9 and the transmission circle 7 between the two, along transmission circle 7 some radially guide grooves 12 are arranged, drive link 11 is arranged in the guide groove 12, the eccentric bushing 2 of eccentric stiffener 1 has the concentric zone 4 and the eccentric district 3 of its endoporus 13 rotational axis relatively, and the rolling element 10 at drive link 7 two ends is meshed with ring gear 9 and the rolling bearing 6 that is arranged on eccentric district 3 respectively, between concentric zone 4 and the transmission circle 7 rolling element 5 is housed, for example, rolling bearing.

Relevant partial structurtes of not addressing on the design parameter of this drive bearing, processing method and the application are literal and complete machine usage mode etc., the relevant patent application that suggestion is submitted to referring to the applicant, the patent No. is respectively: 85200923.2,87 206687.8,92201375.6 and 95221020.7.Also can consult industry standard JB/T6635-93 promulgated by the ministries or commissions of the Central Government, standard name in addition: variable speed transmission bearing.

In order to compensate the coaxiality error between input shaft 16 and the eccentric bushing 2, the rolling bearing 6 that is arranged on eccentric district 3 is spherical rolling bearings, and for example, it can be spherical ball bearing or spherical roller bearing.Meanwhile, an eccentric relatively district 3 is arranged and the counterweight dynamic balancing piece 17 (seeing Fig. 2, Fig. 3) of setting on the eccentric bushing 2.

The shoulder 14 of eccentric bushing 2 concentric zones 4 cooperates the interior boss of transmission circle 7 both sides end caps 8 to play the axial position that 15 restrictions are contained in the rolling bearing of concentric zone 4, ring gear 9 is installed between the both sides end cap 8 of transmission circle 7, be in the annular groove of ring gear 9 between transmission circle 7 both sides end caps 8, constitute a complete integral body, this integral installation folding of will being more convenient for.Transmission circle 7 then can adopt rivet 18 to be riveted into one with its both sides end cap 8, but preferably as shown in Figure 1, and transmission circle 7 and a side end cap 8 are wherein made one.

Claims

1, a kind of drive bearing, comprise eccentric stiffener [1], ring gear [9] and the transmission circle [7] between the two, along transmission circle [7] some radially guide grooves [12] are arranged, drive link [11] is arranged in the guide groove [12], the eccentric bushing [2] of eccentric stiffener [1] has the concentric zone [4] and the eccentric district [3] of its endoporus [13] rotational axis relatively, the rolling element [10] at drive link [11] two ends is meshed with ring gear [9] and the rolling bearing [6] that is arranged on eccentric district [3] respectively, between concentric zone [4] and the transmission circle [7] rolling element [5] is housed, it is characterized in that: the rolling bearing [6] that is arranged on eccentric district [3] is a spherical rolling bearing, and, the eccentric relatively counterweight dynamic balancing piece [17] distinguishing [3] and be provided with is arranged on the eccentric bushing [2].

2, drive bearing according to claim 1 is characterized in that: between the axial position that the shoulder [14] of eccentric bushing [2] concentric zone [4] cooperates the interior boss of transmission circle [7] both sides end caps [8] to play [15] restriction to be contained in the rolling bearing of concentric zone [4], the both sides end cap [8] that ring gear [9] is installed in transmission circle [7].