CN202163247U

CN202163247U - Balance shaft assembly in lightweight simply supported beam structure

Info

Publication number: CN202163247U
Application number: CN2011201951241U
Authority: CN
Inventors: 刘光剑; 张敏; 周在泉; 夏春江
Original assignee: SAIC Iveco Hongyan Commercial Vehicle Co Ltd
Current assignee: SAIC Iveco Hongyan Commercial Vehicle Co Ltd
Priority date: 2011-06-11
Filing date: 2011-06-11
Publication date: 2012-03-14
Anticipated expiration: 2021-06-11

Abstract

The utility model discloses a balance shaft assembly in a lightweight simply supported beam structure, which comprises a balance shaft and a balance shaft support with a center hole. The balance shaft assembly in the lightweight simply supported beam structure is characterized in that an extension portion is arranged on the outer side of the balance shaft support and fixedly connected with an end cap, a shaft groove is arranged on the inner lateral surface of the end cap, the shaft groove is opposite to the center hole, one end of the balance shaft is arranged in the center hole, the other end of the balance shaft is arranged in the shaft groove, the end cap is fixedly connected with the end face of the balance shaft, and two ends of the balance shaft are restrained by the inner wall of the center hole and the inner wall of the shaft groove so that the simply supported beam structure is formed. The balance shaft assembly in the lightweight simply supported beam structure has the advantages that bearing of the balance shaft is improved obviously, so that the balance shaft can be manufactured to be thinner than an existing balance shaft under the same load condition, dead weight of a vehicle is reduced, and installation of the balance shaft support is simplified.

Description

The balance shaft assembly of lightweight simple beam structure

Technical field

The utility model relates to a kind of load-carrying vehicle balance shaft assembly, relates in particular to a kind of balance shaft assembly of lightweight simple beam structure.

Background technology

Existing balance shaft assembly is generally cantilever beam structure; The mesopore that only relies on trunnion base retrains an end of balance shaft; This structure causes balance shaft need bear shearing force and bending moment force effect simultaneously, and therefore, balance shaft must be done to such an extent that very thickly just can meet the demands.

The utility model content

To the problem in the background technology, the utility model is through improving the trunnion base structure, and trunnion base and balance shaft form simple beam structure; Make balance shaft only bear shear action; Improved the stressing conditions of balance shaft, born under the identical loading condition, balance shaft can be done tinyly relatively; Reduce balance shaft weight, also just reduced the deadweight of vehicle indirectly; Its concrete scheme is:

A kind of balance shaft assembly of lightweight simple beam structure comprises trunnion base and the balance shaft of being with mesopore, and its improvement is: the trunnion base arranged outside has extension, and extension is captiveed joint with an end cap; Rubbing surface of end cover is provided with axial trough, and axial trough position and mesopore are relative, and balance shaft one end places in the mesopore; The balance shaft other end places in the axial trough; End cap is captiveed joint with the balance shaft end face, and mesopore inwall and axial trough inwall retrain the balance shaft two ends, forms simple beam structure.

The unsettled section outside face in the middle part of said balance shaft is socketed with a balance shaft housing, and balance shaft and balance shaft housing are rotationally connected, and the balance shaft housing downside is connected with steel spring.

Be provided with bearing between balance shaft housing inwall and the balance shaft outside face.

Balance shaft housing inwall middle part is provided with annular protrusion, and said bearing is 2, and 2 bearings are positioned at the both sides of annular protrusion.

Balance shaft housing two ends end face is provided with thrust washer.

Be provided with sleeve between balance shaft housing inwall and the balance shaft outside face; Balance shaft housing two ends end face is provided with annular groove, is provided with a globe bearing in the annular groove, and globe bearing one end contacts with the annular groove bottom, and the globe bearing other end contacts with trunnion base or end cap.

The contact part position of globe bearing and end cap, the end cap of this position is provided with pad.

End cap is provided with lubricating nipple; The balance shaft middle part is provided with circular groove, and the balance shaft body is provided with oil duct, and oil duct is communicated with lubricating nipple and circular groove.

The useful technique effect of the utility model is: obviously improve the stressing conditions of balance shaft, make balance shaft under identical loading condition, can make more tinyly than existing balance shaft, reduce dead weight of vehicle, simplified the installation of trunnion base.

Description of drawings

The stressed principle schematic of the balance shaft of Fig. 1, structure of the present invention (the trunnion base left surface shown in the figure is connected with the vehicle frame side);

The stressed principle schematic of the balance shaft of Fig. 2, existing cantilever design (the trunnion base top among the figure is connected with the vehicle frame lower aerofoil);

The structural representation one of Fig. 3, the utility model;

The structural representation two of Fig. 4, the utility model;

The outward appearance front elevation of Fig. 5, the utility model;

The outward appearance birds-eye view of Fig. 6, the utility model;

Fig. 7, the utility model three-dimensional view.

The specific embodiment

Referring to Fig. 2; Existing balance shaft assembly comprises the trunnion base 1 and balance shaft 3 of band mesopore 1-1; One end of balance shaft 3 places in the mesopore 1-1, and the other end suspends, and (perhaps balance shaft 3 other ends also are provided with other housing, and balance shaft is shielded; But onrelevant between these housings and the trunnion base 1), form cantilever beam structure; This cantilever beam structure causes the balance shaft 3 and balance shaft 3 roots of trunnion base 1 junction need bear very huge bending moment force, even 3 of balances are drawn dislocation, meanwhile; Receive the position of shearing force to have only one on the balance shaft 3, the shearing force of this position is huge, and the site of action of the site of action of shearing force and bending moment force is very approaching; Cause negative stress very concentrated, if balance shaft 3 is thick inadequately, under the combined action of shearing force and bending moment force; Be easy to damage; Because aforesaid problem just needs balance shaft 3 to make enough thickly, just can bear the combined action of shearing force and bending moment force.

Aforementioned structure except require balance shaft 3 itself need thick relatively; Also cause the installation of trunnion base 1 very complicated: trunnion base 1 is connected through flange with lower aerofoil with the side of vehicle frame and (perhaps only is connected with the lower aerofoil of vehicle frame; But can not only be connected) with the vehicle frame side; Trunnion base 1 bottom also need be connected with the propelling rod lower bracket; The connecting portion of the connecting portion of the lower aerofoil of vehicle frame and trunnion base 1, trunnion base 1 and propelling rod lower bracket is shared the bending moment force that balance shaft 3 is born by these two connecting portions, otherwise just is difficult to guarantee stability of structure.Trunnion base 1 with also have a disadvantage being connected of propelling rod lower bracket; Since the propelling rod lower bracket need bear level to propulsive effort and braking force; The propelling rod lower bracket can be delivered to these horizontal forces on the trunnion base 1; Make it bear unnecessary negative stress, influence the structural stability of balance shaft assembly.

Referring to Fig. 1, what the utility model was done is improved to: at trunnion base 1 arranged outside extension 1-2, extension 1-2 and an end cap 9 captive joints (being connected through flange); End cap 9 medial surfaces are provided with axial trough 9-1; Axial trough 9-1 position is relative with mesopore 1-1; Balance shaft 3 one ends place in the mesopore 1-1, and balance shaft 3 other ends place in the axial trough 9-1, end cap 9 and balance shaft 3 end face captive joints (being connected through flange); Mesopore 1-1 inwall and axial trough 9-1 inwall retrain balance shaft 3 two ends, form simple beam structure.Trunnion base 1, extension 1-2 and end cap 9, three's enclosed space are just as a groove, and balance shaft 3 is placed in this groove, and balance shaft 3 two ends are connected with the both sides cell wall.

Through after the improvement of the utility model, balance shaft 3 stressed obtained following improvement: the formed simple beam structure of the utility model structure is that balance shaft 3 two ends respectively provide a fulcrum, and this makes the position of bearing maximal bending moment power originally transfer to balance shaft 3 middle parts by balance shaft 3 roots; The shearing force that former cause balance shaft 3 one ends bear is shared by balance shaft 3 axle bodies of two position of the fulcrum now; On the one hand, the shearing force that weakened, on the other hand; Shearing force and moment of flexure place of application of force are disperseed relatively; Make that under identical loading condition the balance shaft 3 of coupling the utility model can be done more tinyly, otherwise; Under the identical situation of balance shaft 3 thicknesses, the utility model can make balance shaft 3 bear bigger load;

The improvement that trunnion base 1 obtains has: the antagonistic force of the bending moment force that balance shaft 3 is suffered is born by mesopore 1-1 and end cap 9; Balance shaft 3 is delivered on the end cap 9 through the captive joint between balance shaft 3 and the end cap 9 to the application force that end cap 9 applies; End cap 9 is delivered to power on the trunnion base 1 by extension 1-2 again; Changed the direction of power; Be converted into the power (promptly being converted into pulling capacity) that is parallel to the horizontal plane direction by the original power that is parallel to the vertical plane surface direction, need not again trunnion base 1 be connected with the lower aerofoil of vehicle frame, simplified installation by bending moment force; Simultaneously; Trunnion base 1 does not need to be connected with the propelling rod lower bracket more yet; The level that does not also just need to bear again to come by the transmission of propelling rod lower bracket to negative stress, only depend on trunnion base 1 to be connected the requirement that just can satisfy structural stability now with the flange of the side of vehicle frame.

Have with the utility model bonded assembly peripheral components: the unsettled section outside face in the middle part of balance shaft 3 is socketed with a balance shaft housing 2, and balance shaft 3 is rotationally connected with balance shaft housing 2, and balance shaft housing 2 downsides are connected with steel spring, transmits vertical load to steel spring.

Referring to Fig. 3,, be provided with bearing 4 between balance shaft housing 2 inwalls and balance shaft 3 outside faces for being connected between balance shaft 3 and the balance shaft housing 2 shielded; On this basis, long and deformation takes place for fear of bearing 4, influence the structure operation, be provided with 2 bearings 4, be provided with annular protrusion in the middle part of balance shaft housing 2 inwalls, 2 bearings 4 are positioned at the both sides of annular protrusion.Balance shaft housing 2 two ends end faces are provided with thrust washer 5, are used to adjust the gap between balance shaft housing 2 both ends of the surface and trunnion base 1 and the end cap 9.

Referring to Fig. 4, arranged side by side with the scheme of aforementioned setting " bearing 4 ", between balance shaft housing 2 inwalls and balance shaft 3 outside faces sleeve 22 can also be set; Balance shaft housing 2 two ends end faces are provided with annular groove; Be provided with a globe bearing 21 in the annular groove; Globe bearing 21 1 ends contact with the annular groove bottom; Globe bearing 21 other ends contact with trunnion base 1 or end cap 9, and balance shaft housing 2 two ends end faces do not contact with trunnion base 1 or end cap 9.The contact part position of globe bearing 21 and end cap 9, the end cap 9 of this position is provided with pad 23, and pad 23 plays adjustment globe bearing 21 gaps.

End cap 9 is provided with lubricating nipple 11; Balance shaft 3 middle parts are provided with circular groove, and balance shaft 3 bodies are provided with oil duct, and oil duct is communicated with lubricating nipple 11 and circular groove.Oil flows out from lubricating nipple 11; Behind oil channel, flow in the circular groove; To the motion lubricate between balance shaft 3, balance shaft housing 2, bearing 4 or globe bearing 21 and several persons of sleeve; Corresponding, the relevant position on trunnion base 1 and end cap 9 is provided with oil sealing, and oil is enclosed in the lubricated space.

Claims

1. the balance shaft assembly of a lightweight simple beam structure; The trunnion base (1) and the balance shaft (3) that comprise band mesopore (1-1); It is characterized in that: trunnion base (1) arranged outside has extension (1-2), and extension (1-2) is captiveed joint with an end cap (9); End cap (9) medial surface is provided with axial trough (9-1); Axial trough (9-1) position and mesopore (1-1) are relative; Balance shaft (3) one ends place in the mesopore (1-1), and balance shaft (3) other end places in the axial trough (9-1), and end cap (9) is captiveed joint with balance shaft (3) end face; Mesopore (1-1) inwall and axial trough (9-1) inwall retrain balance shaft (3) two ends, form simple beam structure.

2. the balance shaft assembly of lightweight simple beam structure according to claim 1; It is characterized in that: the unsettled section outside face in the middle part of said balance shaft (3) is socketed with a balance shaft housing (2); Balance shaft (3) is rotationally connected with balance shaft housing (2), and balance shaft housing (2) downside is connected with steel spring.

3. the balance shaft assembly of lightweight simple beam structure according to claim 2 is characterized in that: be provided with bearing (4) between balance shaft housing (2) inwall and balance shaft (3) outside face.

4. the balance shaft assembly of lightweight simple beam structure according to claim 3 is characterized in that: balance shaft housing (2) inwall middle part is provided with annular protrusion, and said bearing (4) is 2, and 2 bearings (4) are positioned at the both sides of annular protrusion.

5. the balance shaft assembly of lightweight simple beam structure according to claim 2 is characterized in that: balance shaft housing (2) two ends end face is provided with thrust washer (5).

6. the balance shaft assembly of lightweight simple beam structure according to claim 2 is characterized in that: be provided with sleeve (22) between balance shaft housing (2) inwall and balance shaft (3) outside face; Balance shaft housing (2) two ends end face is provided with annular groove; Be provided with a globe bearing (21) in the annular groove; Globe bearing (21) one ends contact with the annular groove bottom, and globe bearing (21) other end contacts with trunnion base (1) or end cap (9).

7. the balance shaft assembly of lightweight simple beam structure according to claim 6 is characterized in that: the contact part position of globe bearing (21) and end cap (9), the end cap of this position (9) is provided with pad (23).

8. the balance shaft assembly of lightweight simple beam structure according to claim 4 is characterized in that: end cap (9) is provided with lubricating nipple (11); Balance shaft (3) middle part is provided with circular groove, and balance shaft (3) body is provided with oil duct, and oil duct is communicated with lubricating nipple (11) and circular groove.