CN110370882A - A kind of lightweight disconnected balance shaft suspension assembly structure - Google Patents
A kind of lightweight disconnected balance shaft suspension assembly structure Download PDFInfo
- Publication number
- CN110370882A CN110370882A CN201910761311.2A CN201910761311A CN110370882A CN 110370882 A CN110370882 A CN 110370882A CN 201910761311 A CN201910761311 A CN 201910761311A CN 110370882 A CN110370882 A CN 110370882A
- Authority
- CN
- China
- Prior art keywords
- balance
- spring block
- hollow shaft
- hollow
- lightweight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
- B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
- B60G11/113—Mountings on the axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
- B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
- B60G11/12—Links, pins, or bushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The present invention discloses a kind of lightweight disconnected balance shaft suspension assembly structure, including two symmetrically arranged balance brackets, upper spring block, lower spring block, end cap, the body interior of the balance bracket set there are three it is longitudinal side by side and the hollow-out parts that are not communicated with, the lower end relative position of two balance brackets is fixedly connected with attachment base, longitudinal front and back sides of the attachment base offer multiple bolts hole, and ipsilateral of two attachment base longitudinal direction seat front and back sides is symmetrically connected with the identical connecting plate of size by bolt；The balance bracket is Y-shaped structure body, and two bifurcated upper ends on Y-shaped structure body top are respectively set there are two vertical installation surface；The crotch of the Y-shaped structure body is provided with the horizontal mounting surface of the outer body positioned at balance bracket；The ontology of the balance bracket is equipped with the hollow shaft head extended to its outside.The present invention realizes light-weight design under the premise of guaranteeing payload.
Description
Technical field
The present invention relates to balance shaft technical field, specifically a kind of lightweight disconnected balance shaft suspension assembly structure.
Background technique
Balance shaft assembly as heavy truck key components and parts transmit vehicle frame to middle rear axle load.With national every
The implementation of energy-saving and emission-reduction policy, heavy truck will develop towards light-weighted direction, but domestic equilibrium Structural Design of Shaft at present
Unreasonable to cause to crack, for the axle housing of partial equilibrium axle assembly product there is also the quality problems of oil leak, leakage point mainly has end cap
At oil sealing two, end cap oil leak is mainly poorly sealed, and oil sealing oil leak is mainly single oil seal lip abrasion.In addition, a large amount of dusts,
Short grained silt enters in axle housing cavity from single oil sealing, aggravates single oil sealing degree of wear, and single oil sealing leads to assembly once failing
Oil leak.Contact surface between existing assembly axis belt supporting frame and frame beam is a big plane, balance shaft assembly and vehicle frame
Crossbeam connection reliability is not high, is also easy to produce bracket or connects the risk of bolt fracture.
Summary of the invention
The purpose of the present invention is to provide a kind of lightweight disconnected balance shaft suspension assembly structures, to solve above-mentioned background
The problem of being proposed in technology.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that:
A kind of lightweight disconnected balance shaft suspension assembly structure, including two symmetrically arranged balance brackets, upper leaf spring
Seat, lower spring block, end cap, the body interior of the balance bracket set there are three it is longitudinal side by side and the hollow-out parts that are not communicated with, it is described
Several supporting ribs are equipped in hollow-out parts, the lower end relative position of two balance brackets is fixedly connected with attachment base, the company
Longitudinal front and back sides of joint chair offer multiple bolts hole, and ipsilateral of two attachment base longitudinal direction seat front and back sides passes through bolt
It is symmetrically connected with the identical connecting plate of size；
The balance bracket is Y-shaped structure body, there are two two bifurcated upper ends on Y-shaped structure body top are respectively set
Vertical installation surface, two vertical installation surfaces are arranged symmetrically；
The crotch of the Y-shaped structure body is provided with the horizontal mounting surface of the outer body positioned at balance bracket；
Integration is equipped with to its horizontal-extending hollow shaft head in outside, the hollow shaft head on the ontology of the balance bracket
Periphery and the ontology intersection of the balance bracket be equipped with spacing collar, rubber lining is arranged on the periphery of the hollow shaft head
Set, and the periphery of the hollow shaft head is equipped with the annular groove cooperated with annular projection set by the rubber bushing medial surface
Slot, the rubber bushing external cylindrical surface are equipped with spring block and lower spring block, and the upper spring block and lower spring block pass through spiral shell
Nail is fixed, and compresses the rubber bushing, and the assembly medial surface of the upper spring block and lower spring block also be provided with it is described
The annular ditch groove of the cooperation of annular projection set by rubber bushing lateral surface, the upper spring block, lower spring block are far from balance bracket
One end be equipped with the end cap, be connected by screw between the end cap and upper spring block, lower spring block；
The adjacent side upper end of two balance brackets is equipped with free bearing, is connected between two free bearings by latch locking
Arch support axis, it is concordant that the upper end supporting surface of the arch support axis with the horizontal mounting surface is formed by supporting surface.
Further, it is equipped with boss on the inside of the end cap, hollow shaft head one end adjacent with end cap is equipped with and boss
The bench port of cooperation.
Further, the inside of the hollow shaft head and the hollow-out parts of the centre of three hollow-out parts one communicate, and the two phase
Arc transition is used at friendship.
Preferably, the arch support axis uses hollow shaft.
Preferably, the balance bracket, hollow shaft head, upper spring block, lower spring block are all made of austempering ductile iron
Material is made.
The beneficial effects of the present invention are:
Balance bracket uses integrated casting and forming with hollow shaft head, keeps the structural strength of balance shaft high；
In the case where guaranteeing balance shaft intensity, balance bracket is engraved structure, and hollow shaft head is hollow structure, is reduced
The weight of balance shaft；
By the design of rubber bushing, it can effectively decay and balance axis suspension radial load, and reduce balance shaft oil leak
Risk；
The connecting plate that ipsilateral of attachment base longitudinal direction seat front and back sides is symmetrically connected by bolt keeps balance axis suspension total
Closed NOL ring is formed at vehicle frame, the bearing capacity of assembly is improved, can increase the intensity of balance shaft, reduce balance bracket
The risk of cracking；
It cooperates with horizontal mounting surface to support frame beam jointly by the upper end supporting surface of arch support axis, it is total to improve balance shaft
At the reliability and safety being connect with vehicle frame；
Balance bracket, solid spindle nose, upper spring block, lower spring block are all made of tensile strength 900MPa, yield strength
The ADI material (austempering ductile iron) of 650MPa, the comprehensive mechanical property of this material is excellent, and tensile strength and surrender are strong
Degree is all higher than magnesium iron and cast steel, and it remains good elongation and impact toughness again, is significantly better than common magnesium iron and steel.
Material specific gravity itself is smaller than cast steel, realizes lightweight.Meanwhile the tensile strength of ADI is better than the carbon steel of modifier treatment, with low-alloy
Steel is suitable.China is haulage vehicle big producer, and ADI automobile hanging part has huge development space.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is structure of the invention main view.
Fig. 2 is balance bracket and upper spring block, lower spring block composite structure perspective view.
In figure: 1, balance bracket, 2, upper spring block, 3, lower spring block, 4, end cap, 5, hollow-out parts, 6, supporting rib, 7, connection
Seat, 8, connecting plate, 9, vertical installation surface, 10, horizontal mounting surface, 11, hollow shaft head, 12, spacing collar, 13, rubber bushing, 14,
Free bearing, 15, bolt, 16, arch support axis, 17, boss.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Fig. 1~2, the present invention provides a kind of lightweight disconnected balance shaft suspension assembly structure, including two right
Claim balance bracket 1, the upper spring block 2, lower spring block 3, end cap 4 of setting, the body interior of the balance bracket 1 sets that there are three vertical
To side by side and the hollow-out parts 5 that are not communicated with, several supporting ribs 6, the lower end of two balance brackets 1 are equipped in the hollow-out parts 5
Relative position is fixedly connected with attachment base 7, and longitudinal front and back sides of the attachment base 7 offer multiple bolts hole, two connections
Ipsilateral of 7 longitudinal front and back sides of seat is symmetrically connected with the identical connecting plate 8 of size by bolt；
The balance bracket 1 is Y-shaped structure body, and two bifurcated upper ends on Y-shaped structure body top are respectively arranged with two
A vertical installation surface 9, two vertical installation surfaces 9 are arranged symmetrically；
The crotch of the Y-shaped structure body is provided with the horizontal mounting surface 10 positioned at the outer body of balance bracket 1；
Integration is equipped with to its horizontal-extending hollow shaft head 11 in outside on the ontology of the balance bracket 1, described hollow
The periphery of spindle nose 11 and the ontology intersection of the balance bracket 1 are equipped with spacing collar 12, cover on the periphery of the hollow shaft head 11
Equipped with rubber bushing 13, and the periphery of the hollow shaft head 11 is equipped with convex with ring-type set by 13 medial surface of rubber bushing
The annular ditch groove of cooperation is played, 13 external cylindrical surface of rubber bushing is equipped with spring block 2 and lower spring block 3, the upper leaf spring
Seat 2 is fixed with lower spring block 3 by screw, and compresses the rubber bushing 13, and the upper spring block 2 and lower spring block 3
Assembly medial surface also is provided with the annular ditch groove cooperated with annular projection set by 13 lateral surface of rubber bushing, the upper plate
Spring abutment 2, lower spring block 3 are equipped with the end cap 4, the end cap 4 and upper spring block 2, lower spring block 3 far from one end of balance bracket
Between be connected by screw to, when upper spring block 2 is assemblied on 13 cylindrical surface of rubber bushing with lower spring block 3, by set
Spacing collar 12 carries out axial limitation, and spacing collar 12 also acts as balance bracket 1 and revolves with upper spring block 2,3 end face of lower spring block
Turn the effect of friction；
The adjacent side upper end of two balance brackets 1 is equipped with free bearing 14, is locked between two free bearings 14 by bolt 15
Surely it is connected with arch support axis 16, the upper end supporting surface of the arch support axis 16 and the horizontal mounting surface 10 are formed by branch
Support face is concordant.
It is equipped with boss 17 on the inside of end cap 4, the hollow shaft head 11 one end adjacent with end cap 4 is equipped with cooperating with boss 16
Bench port facilitates end cap 4 to install by the cooperation of boss 17 and bench port, while reinforcing the intensity of hollow shaft head 11, to its sky
Interior portion is played a supporting role.
The inside of hollow shaft head 11 and the hollow-out parts 5 of the centre of three hollow-out parts 5 one communicate, and the two intersection is using circle
Arc transition, this kind of transient mode of junction are conducive to improve structural strength.
Arch support axis 16 uses hollow shaft, it is therefore an objective in the case where guaranteeing sufficient intensity, mitigate weight.
Balance bracket 1, hollow shaft head 11, upper spring block 2, lower spring block 3 are all made of austempering ductile iron material system
At.
Comprehensive technical solution of the present invention, balance bracket 1 use integrated casting and forming with hollow shaft head 11, make balance shaft
Structural strength it is high；In the case where guaranteeing balance shaft intensity, balance bracket 1 is engraved structure, and hollow shaft head 2 is hollow knot
Structure reduces the weight of balance shaft；By the design of rubber bushing 13, it can effectively decay and balance axis suspension radial load, and
Reduce balance shaft oil leak risk；The connecting plate that ipsilateral of 7 longitudinal front and back sides of attachment base is symmetrically connected by bolt
8, so that balance shaft suspension assembly and vehicle frame is formed closed NOL ring, improves the bearing capacity of assembly, can increase the strong of balance shaft
Degree reduces the risk of balance bracket cracking；Cooperate with horizontal mounting surface 10 common by the upper end supporting surface of arch support axis 16
Frame beam is supported, reliability and safety that balance shaft assembly is connect with vehicle frame are improved；Balance bracket 1, solid spindle nose 11,
Upper spring block 2, lower spring block 3 are all made of tensile strength 900MPa, ADI material (the isothermal hardening spheroidal graphite of yield strength 650MPa
Cast iron), the comprehensive mechanical property of this material is excellent, and tensile strength and yield strength are all higher than magnesium iron and cast steel, and it is again
Good elongation and impact toughness are remained, common magnesium iron and steel are significantly better than.Material specific gravity itself is smaller than cast steel, realizes light
Quantization.Meanwhile the tensile strength of ADI is better than the carbon steel of modifier treatment, it is suitable with low-alloy steel.China is that haulage vehicle production is big
State, ADI automobile hanging part have huge development space.
The embodiments of the present invention described above are not intended to limit the scope of the present invention, any in the present invention
Spirit and principle within made modifications, equivalent substitutions and improvements etc., should be included in claim protection model of the invention
Within enclosing.
Claims (5)
1. a kind of lightweight disconnected balance shaft suspension assembly structure, which is characterized in that including two symmetrically arranged balance branch
Frame, upper spring block, lower spring block, end cap, the body interior of the balance bracket set there are three it is longitudinal side by side and what is be not communicated with engraves
Empty portion, the hollow-out parts are interior to be equipped with several supporting ribs, and the lower end relative position of two balance brackets is fixedly connected with connection
Seat, longitudinal front and back sides of the attachment base offer multiple bolts hole, and ipsilateral of two attachment base longitudinal direction seat front and back sides
The identical connecting plate of size is symmetrically connected with by bolt；
The balance bracket is Y-shaped structure body, and two bifurcated upper ends on Y-shaped structure body top are respectively set that there are two vertical
Mounting surface, two vertical installation surfaces are arranged symmetrically；
The crotch of the Y-shaped structure body is provided with the horizontal mounting surface of the outer body positioned at balance bracket；
Integration is equipped with to its horizontal-extending hollow shaft head in outside on the ontology of the balance bracket, the hollow shaft head it is outer
All ontology intersections with the balance bracket are equipped with spacing collar, are arranged with rubber bushing on the periphery of the hollow shaft head, and
The periphery of the hollow shaft head is equipped with the annular ditch groove cooperated with annular projection set by the rubber bushing medial surface, described
Rubber bushing external cylindrical surface is equipped with spring block and lower spring block, and the upper spring block is fixed with lower spring block by screw,
And the rubber bushing is compressed, and the assembly medial surface of the upper spring block and lower spring block also is provided with and the rubber bushing
The annular ditch groove of the cooperation of annular projection set by lateral surface, the upper spring block, lower spring block are set far from one end of balance bracket
There is the end cap, is connected by screw between the end cap and upper spring block, lower spring block；
The adjacent side upper end of two balance brackets is equipped with free bearing, is connected with arch by latch locking between two free bearings
Support shaft, it is concordant that the upper end supporting surface of the arch support axis with the horizontal mounting surface is formed by supporting surface.
2. lightweight disconnected balance shaft suspension assembly structure according to claim 1, which is characterized in that in the end cap
Side is equipped with boss, and hollow shaft head one end adjacent with end cap is equipped with the bench port cooperated with boss.
3. lightweight disconnected balance shaft suspension assembly structure according to claim 1, which is characterized in that the hollow shaft
The inside of head and the hollow-out parts of centre one of three hollow-out parts communicate, and the two intersection uses arc transition.
4. lightweight disconnected balance shaft suspension assembly structure according to claim 1, which is characterized in that the arch branch
It supports axis and uses hollow shaft.
5. lightweight disconnected balance shaft suspension assembly structure according to claim 1, which is characterized in that the balance branch
Frame, hollow shaft head, upper spring block, lower spring block are all made of austempering ductile iron material and are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910761311.2A CN110370882A (en) | 2019-08-17 | 2019-08-17 | A kind of lightweight disconnected balance shaft suspension assembly structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910761311.2A CN110370882A (en) | 2019-08-17 | 2019-08-17 | A kind of lightweight disconnected balance shaft suspension assembly structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110370882A true CN110370882A (en) | 2019-10-25 |
Family
ID=68259684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910761311.2A Pending CN110370882A (en) | 2019-08-17 | 2019-08-17 | A kind of lightweight disconnected balance shaft suspension assembly structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110370882A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721563A (en) * | 2019-10-28 | 2021-04-30 | 陕西重型汽车有限公司 | Maintenance-free disconnected balance shaft assembly and balance suspension system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030038908A (en) * | 2001-11-07 | 2003-05-17 | 현대자동차주식회사 | rear suspension structure of car |
| CN201423899Y (en) * | 2009-04-22 | 2010-03-17 | 吉林省诚毅车桥悬挂制造集团有限公司 | Hinged pull rod type balancing suspension assembly for heavy duty car |
| CN201989585U (en) * | 2011-03-17 | 2011-09-28 | 陈明伟 | Separate-type balancing suspension system |
| CN104742683A (en) * | 2015-03-23 | 2015-07-01 | 安徽安凯金达机械制造有限公司 | Heavy-load balance shaft assembly |
| CN204506401U (en) * | 2015-03-23 | 2015-07-29 | 安徽安凯金达机械制造有限公司 | The separating stent-graft of assembly is hung in a kind of lightweight heavily card balance shaft |
| CN105751850A (en) * | 2016-02-29 | 2016-07-13 | 山东安博机械科技股份有限公司 | Ultra-lightweight balanced suspension |
| CN106864195A (en) * | 2017-03-15 | 2017-06-20 | 山东安博机械科技股份有限公司 | One kind is without thrust rod-type balance shaft support |
| CN206678729U (en) * | 2017-03-09 | 2017-11-28 | 中国第一汽车股份有限公司 | A kind of automobile-used balance shaft support of heavy type commercial |
| CN110126569A (en) * | 2019-05-30 | 2019-08-16 | 江苏汤臣汽车零部件有限公司 | A kind of fixed device of load-carrying plate spring for vehicle |
-
2019
- 2019-08-17 CN CN201910761311.2A patent/CN110370882A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030038908A (en) * | 2001-11-07 | 2003-05-17 | 현대자동차주식회사 | rear suspension structure of car |
| CN201423899Y (en) * | 2009-04-22 | 2010-03-17 | 吉林省诚毅车桥悬挂制造集团有限公司 | Hinged pull rod type balancing suspension assembly for heavy duty car |
| CN201989585U (en) * | 2011-03-17 | 2011-09-28 | 陈明伟 | Separate-type balancing suspension system |
| CN104742683A (en) * | 2015-03-23 | 2015-07-01 | 安徽安凯金达机械制造有限公司 | Heavy-load balance shaft assembly |
| CN204506401U (en) * | 2015-03-23 | 2015-07-29 | 安徽安凯金达机械制造有限公司 | The separating stent-graft of assembly is hung in a kind of lightweight heavily card balance shaft |
| CN105751850A (en) * | 2016-02-29 | 2016-07-13 | 山东安博机械科技股份有限公司 | Ultra-lightweight balanced suspension |
| CN206678729U (en) * | 2017-03-09 | 2017-11-28 | 中国第一汽车股份有限公司 | A kind of automobile-used balance shaft support of heavy type commercial |
| CN106864195A (en) * | 2017-03-15 | 2017-06-20 | 山东安博机械科技股份有限公司 | One kind is without thrust rod-type balance shaft support |
| CN110126569A (en) * | 2019-05-30 | 2019-08-16 | 江苏汤臣汽车零部件有限公司 | A kind of fixed device of load-carrying plate spring for vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721563A (en) * | 2019-10-28 | 2021-04-30 | 陕西重型汽车有限公司 | Maintenance-free disconnected balance shaft assembly and balance suspension system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191025 |