CN218582222U - Diaphragm spring and pressing block pre-tightening mechanism with long fatigue life - Google Patents
Diaphragm spring and pressing block pre-tightening mechanism with long fatigue life Download PDFInfo
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- CN218582222U CN218582222U CN202222836966.1U CN202222836966U CN218582222U CN 218582222 U CN218582222 U CN 218582222U CN 202222836966 U CN202222836966 U CN 202222836966U CN 218582222 U CN218582222 U CN 218582222U
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- diaphragm spring
- briquetting
- adjusting nut
- pressing block
- fatigue life
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Abstract
The utility model belongs to the technical field of electric power assisted steering system technique and specifically relates to a high fatigue life's diaphragm spring and briquetting pretension mechanism, including diaphragm spring, briquetting, adjusting nut, diaphragm spring is installed to adjusting nut's bottom, and diaphragm spring is located between adjusting nut and the briquetting, and diaphragm spring is the ring structure, is equipped with the difference in height between diaphragm spring's inner circle and the outer lane, and diaphragm spring's inner circle cover is established on the briquetting, and adjusting nut and briquetting press from both sides tight diaphragm spring's outer lane. Compared with the prior art, the utility model, be equipped with the difference in height between diaphragm spring's inner circle and the outer lane to cooperation boss structure provides great rigidity at the deformation initial stage, and certain deformation back, diaphragm spring tends to gently, and rigidity reduces gradually. After fatigue wear, even if the deformation amount is reduced to a certain extent, enough spring force can be provided at the initial stage of deformation, enough pre-tightening is provided for the gear rack, the service life is prolonged, and the noise performance of the steering engine after fatigue endurance is improved.
Description
Technical Field
The utility model belongs to the technical field of the electric power steering system technique and specifically relates to a diaphragm spring and briquetting pretension mechanism of high fatigue life.
Background
The diaphragm spring and the pressing block are mainly used for providing pretightening force for the gear rack of the steering engine so as to eliminate the clearance between the gear rack and the gear rack, and therefore the gear rack can be meshed stably and quietly.
Referring to fig. 1, a conventional compact is composed of a compact body 1 made of an aluminum alloy and a plastic lining 2, and is installed in a compact hole of a steering gear housing through a seal ring 3. The arc surface 4 of the pressing block is attached to the tooth back of the rack 5 and is pressed tightly by the adjusting nut 6 and the planar diaphragm spring 7 arranged on the adjusting nut.
When the gear and the rack are meshed, the pressing block is pushed open due to the change of the meshing point and the action of the axial force F, and the planar diaphragm spring 7 is deformed. When the gear rack is restored, the pressing block is restored to the initial position to press the gear rack again under the action of the planar diaphragm spring 7.
However, referring to fig. 2, the spring rate of the planar diaphragm spring 7 gradually increases with the amount of deformation, and the spring force is mainly concentrated at the latter stage of deformation. After the plane diaphragm spring 7 is abraded, the deformation amount is reduced, the spring force is obviously reduced, after the pressing block is pushed open, the spring force is not enough to enable the pressing block to restore to the original position to provide pre-tightening for the gear and the rack, and the gaps between the gear and the rack and between the rack and the pressing block can cause the steering engine to generate impact noise during operation.
Therefore, a diaphragm spring and a pressing block pre-tightening mechanism with long fatigue life need to be designed, after fatigue wear, the diaphragm spring can still provide a larger spring force, pre-tightening is provided for a gear rack, and noise performance of a steering engine after fatigue durability is improved.
Disclosure of Invention
The utility model aims at overcoming prior art's is not enough, provides a high fatigue life's diaphragm spring and briquetting pretension mechanism, and after fatigue wear, diaphragm spring still can provide great spring force, provides the pretension for rack and pinion, improves the noise performance of steering gear after fatigue durability.
In order to achieve the purpose, the utility model provides a high fatigue life's diaphragm spring and briquetting pretension mechanism, including diaphragm spring, briquetting, adjusting nut, diaphragm spring is installed to adjusting nut's bottom, and diaphragm spring is located between adjusting nut and the briquetting, and diaphragm spring is the ring structure, is equipped with the difference in height between diaphragm spring's inner circle and the outer lane, and diaphragm spring's inner circle cover is established on the briquetting, and adjusting nut and briquetting press from both sides tight diaphragm spring's outer lane.
The center of the top of the pressing block is provided with a groove, the center of the groove is provided with a cylinder, the top of the cylinder is provided with a boss, a round hole in the center of the diaphragm spring is sleeved outside the boss, and the edge of the cylinder abuts against an inner ring of the diaphragm spring.
The pressing block comprises an aluminum alloy pressing block body and a plastic lining, and the plastic lining is arranged at the bottom of the aluminum alloy pressing block body.
The bottom of the plastic lining is provided with an arc-shaped groove which is attached to the tooth back of the rack.
The aluminum alloy pressing block body is a cylinder, two rings of circular grooves are arranged on the outer circular surface of the cylinder, and sealing rings are arranged in the circular grooves.
The adjusting nut is provided with a central hole.
Compared with the prior art, the utility model, be equipped with the difference in height between diaphragm spring's inner circle and the outer lane to cooperation boss structure provides great rigidity at the deformation initial stage, and certain deformation back, diaphragm spring tends to gently, and rigidity reduces gradually. After fatigue wear, even if the deformation amount is reduced to a certain extent, enough spring force can be provided at the initial deformation stage, and enough pre-tightening is provided for the gear rack, so that the service lives of the diaphragm spring and the pressing block are prolonged, and the noise performance of the steering engine after fatigue durability is improved.
Drawings
Fig. 1 is a schematic diagram of the prior art.
Fig. 2 is a prior art flat diaphragm spring rate curve.
Fig. 3 is a schematic diagram of the present invention.
Fig. 4 is a schematic view of the diaphragm spring of the present invention.
Fig. 5 is a cross-sectional view of the diaphragm spring of the present invention.
Fig. 6 is a stiffness curve of the diaphragm spring of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Referring to fig. 3-5, the utility model provides a high fatigue life's diaphragm spring and briquetting pretension mechanism, including diaphragm spring, briquetting, adjusting nut, diaphragm spring 8 is installed to adjusting nut 6's bottom, and diaphragm spring 8 is located between adjusting nut 6 and the briquetting, and diaphragm spring 8 is the ring structure, is equipped with the difference in height between diaphragm spring 8's inner circle 11 and the outer lane 12, and diaphragm spring 8's 11 covers of inner circle are established on the briquetting, and adjusting nut 6 and briquetting press from both sides tight diaphragm spring 8's outer lane 12.
The utility model discloses in, diaphragm spring 8's material is the spring steel.
The central authorities in briquetting top are equipped with recess 18, and recess 18 is convenient for the centre gripping briquetting, makes things convenient for the installation and the dismantlement of briquetting. The center of the groove 18 is provided with a cylinder 19, the top of the cylinder 19 is provided with a boss 20, a round hole 10 in the center of the diaphragm spring 8 is sleeved outside the boss 20 to prevent the diaphragm spring 8 from falling off, and the edge of the cylinder 19 abuts against the inner ring of the diaphragm spring 8 to compress the inner ring of the diaphragm spring 8.
The briquetting includes aluminum alloy briquetting body 1, plastic liner 2, and the bottom of aluminum alloy briquetting body 1 is equipped with plastic liner 2.
The bottom of the plastic lining 2 is provided with an arc-shaped groove 15, and the arc-shaped groove 15 is attached to the tooth back of the rack 5.
The aluminum alloy pressing block body 1 is a cylinder, two rings of circular grooves are arranged on the outer circular surface of the cylinder, and a sealing ring 3 is arranged in each circular groove.
The adjusting nut 6 is provided with a central hole 21, and the central hole 21 is used for measuring the position of a pressing block and installing a nut plug to provide sealing for the system.
Referring to fig. 6, the inner ring 11 of the diaphragm spring 8 is higher than the outer ring 12, which provides a larger stiffness at the initial stage of deformation; after a certain deformation, the diaphragm spring 8 is gradually relaxed due to the pressure, and the rigidity is gradually reduced. After the steering engine is fatigue-resistant, the diaphragm spring 8 has a certain amount of abrasion, and the deformation amount is reduced compared with a new piece under the same displacement excitation of the pressing block. However, since the stiffness of the spring is mainly concentrated at the initial stage of deformation, the smaller amount of deformation of the diaphragm spring 8 after wear can still provide sufficient spring force and pre-load of the press block. Therefore, after the steering engine is durable, the pressing block can still respond quickly and returns to the initial position under the action of the spring to provide pre-tightening for the gear and the rack, and further the noise performance of the steering engine after the steering engine is durable is improved.
Through the actual measurement contrast, behind 0.3 mm's wearing and tearing volume, plane diaphragm spring's spring force has attenuated 480N, the utility model discloses a diaphragm spring's spring force attenuation is only 110N.
The utility model discloses a be equipped with the difference in height between diaphragm spring's inner circle and the outer lane to cooperation boss structure provides great rigidity at the deformation initial stage, and certain deformation back, diaphragm spring tends to gently, and rigidity reduces gradually. After fatigue wear, even if the deformation amount is reduced to a certain extent, enough spring force can be provided at the initial stage of deformation, and enough pre-tightening is provided for the gear and the rack, so that the service lives of the diaphragm spring and the pressing block are prolonged, and the noise performance of the steering engine after fatigue durability is improved.
Claims (6)
1. The utility model provides a high fatigue life's diaphragm spring and briquetting pretension mechanism, includes diaphragm spring, briquetting, adjusting nut, its characterized in that: diaphragm spring (8) are installed to the bottom of adjusting nut (6), and diaphragm spring (8) are located between adjusting nut (6) and the briquetting, and diaphragm spring (8) are the ring structure, are equipped with the difference in height between inner circle (11) and outer lane (12) of diaphragm spring (8), and inner circle (11) cover of diaphragm spring (8) is established on the briquetting, and adjusting nut (6) and briquetting press from both sides outer lane (12) of tight diaphragm spring (8).
2. The high fatigue life diaphragm spring and mass pretensioning mechanism according to claim 1, wherein: the center of the top of the pressing block is provided with a groove (18), the center of the groove (18) is provided with a cylinder (19), the top of the cylinder (19) is provided with a boss (20), a round hole (10) at the center of the diaphragm spring (8) is sleeved outside the boss (20), and the edge of the cylinder (19) is abutted against the inner ring of the diaphragm spring (8).
3. The high fatigue life diaphragm spring and mass pretensioning mechanism of claim 1, characterized in that: the pressing block comprises an aluminum alloy pressing block body (1) and a plastic lining (2), and the plastic lining (2) is arranged at the bottom of the aluminum alloy pressing block body (1).
4. The high fatigue life diaphragm spring and mass pretensioning mechanism according to claim 3, wherein: the bottom of the plastic lining (2) is provided with an arc-shaped groove (15), and the arc-shaped groove (15) is attached to the tooth back of the rack (5).
5. The high fatigue life diaphragm spring and mass pretensioning mechanism according to claim 3, wherein: the aluminum alloy pressing block body (1) is a cylinder, two rings of circular grooves are formed in the outer circular surface of the cylinder, and sealing rings (3) are installed in the circular grooves.
6. The high fatigue life diaphragm spring and mass pretensioning mechanism of claim 1, characterized in that: the adjusting nut (6) is provided with a central hole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222836966.1U CN218582222U (en) | 2022-10-27 | 2022-10-27 | Diaphragm spring and pressing block pre-tightening mechanism with long fatigue life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222836966.1U CN218582222U (en) | 2022-10-27 | 2022-10-27 | Diaphragm spring and pressing block pre-tightening mechanism with long fatigue life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218582222U true CN218582222U (en) | 2023-03-07 |
Family
ID=85374182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222836966.1U Active CN218582222U (en) | 2022-10-27 | 2022-10-27 | Diaphragm spring and pressing block pre-tightening mechanism with long fatigue life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218582222U (en) |
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2022
- 2022-10-27 CN CN202222836966.1U patent/CN218582222U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: BOSHI HUAYU TURNING SYSTEM (WUHAN) CO.,LTD. Assignor: BOSCH HUAYU STEERING SYSTEMS Co.,Ltd. Contract record no.: X2023980036901 Denomination of utility model: A High Fatigue Life Diaphragm Spring and Compression Block Pretensioning Mechanism Granted publication date: 20230307 License type: Common License Record date: 20230625 |