CN202251328U - U-bolt for leaf spring of heavy duty truck - Google Patents
U-bolt for leaf spring of heavy duty truck Download PDFInfo
- Publication number
- CN202251328U CN202251328U CN2011203462502U CN201120346250U CN202251328U CN 202251328 U CN202251328 U CN 202251328U CN 2011203462502 U CN2011203462502 U CN 2011203462502U CN 201120346250 U CN201120346250 U CN 201120346250U CN 202251328 U CN202251328 U CN 202251328U
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- Prior art keywords
- bolt
- bolts
- leaf spring
- circular arc
- section
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- Expired - Fee Related
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- Springs (AREA)
Abstract
The utility model relates to a u-bolt for a leaf spring of a heavy duty truck. The u-bolt comprises a u-bolt body with three parts, wherein the three parts are a threaded part, a rod body and a transitional part; a fine thread is formed on the threaded part; a ring groove is formed at the joint of the threaded part and the rod body; the transitional part is formed by smoothly connecting circular arcs on the two sides with a circular arc in the middle; and the cross section of the middle of the transitional part is waisted. As the ring groove is formed at the tail end of the threaded part, the stress saltation on the transitional area at the transitional part is reduced; due to the connection angle and the waisted design of the transitional part, the stress on the u-bolt is more reasonable, so that the service life of the u-bolt is improved; and due to the novel arc transition structure, the invalid height of the u-bolt is greatly reduced to be lower than 60 percent that of the conventional n-shaped u-bolt, so that the material utilization ratio is improved, and the stress on the u-bolt is greatly improved.
Description
Technical field
The utility model belongs to the leaf spring technical field of automotive suspension, and the leaf spring that is specifically related to heavy truck is used U-bolts.
Background technique
Automobile leaf spring has crucial effects with U-bolts in suspension assembly, the quality of its performance has important effect for the Security of suspension system.At present, the leaf spring of heavy truck uses its structure of U-bolts to be mostly ∩ type or ∏ type.∩ type U-bolts middle transition is shaped as semicircle, and the upper end intermediate location is higher, and the leaf spring cover plate volume that is adopted is bigger, and material is had bigger waste; ∏ type middle transition is a straightened condition partly, and knuckle is little, and stress is concentrated seriously at the using process knuckle position in bending process, heat treatment process and later stage, and fatigue life is little.
Summary of the invention
To the deficiency that above-mentioned existing two kinds of U-bolts exist, the utility model provides a kind of leaf spring that improves the heavy truck of structure to use U-bolts.
Concrete improvement technological scheme is following:
The leaf spring of heavy truck comprises the body that is divided into three part U-bolts with U-bolts, and wherein both side ends is a helical thread portion, and one section that is connected with helical thread portion is columniform shaft, and the portion that is connected with the both sides shaft is respectively the transition portion of U-shaped;
Said helical thread portion is a fine thread, and the joint of helical thread portion and shaft is provided with annular groove, and the cross section of annular groove is a circular arc;
Said transition portion is on the both sides circular arc and the middle part circular arc is smooth is formed by connecting, and the angle between the tangent line of said both sides circular arc is 140 degree, and the middle cross section of transition portion is a waist shape.
The groove width X of said annular groove is the pitch greater than 2 times said fine thread, less than the pitch of 3 times said fine threads; The circular arc of annular groove cross section half warp is greater than groove width X, and annular groove place minimum diameter should be not less than the middle footpath of screw thread.
The width of the middle cross section of said transition portion is the straight warp of shaft greater than 1.5 times, less than the straight warp of 2 times shafts; The whole height of transition portion is the straight warp of shaft greater than 6 times.
The utility model heavy truck leaf spring is used U-bolts, has adopted unique run-out(of thread) ending structure, has reduced the stress mutation of screw thread transition region; The connection angle of transition portion and the design of waist type make the more reasonable stress of U-bolts, the working life of having improved U-bolts; Novel arc transition structure greatly reduces U-bolts and reduces invalid height, the invalid reduced height of more former ∩ type U-bolts 40%, improved the utilization ratio of material, simultaneously it is stressedly also had greatly improved.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the partial enlarged drawing of Fig. 1.
Sequence number among the last figure: helical thread portion 1, shaft 2, transition portion 3, annular groove 4.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done explanation further through embodiment.
Embodiment:
Referring to Fig. 1 and Fig. 2; The leaf spring of heavy truck comprises the body that is divided into three part U-bolts with U-bolts; Wherein the both side ends I is a helical thread portion 1, and the one section II that is connected with helical thread portion 1 is columniform shaft 2, and the part III that is connected with both sides shaft 2 is the transition portion 3 of U-shaped.
Helical thread portion 1 is a fine thread, and helical thread portion 1 is provided with annular groove 4 with the joint of shaft 2, sees Fig. 3, and the cross section of annular groove is a circular arc; The groove width X of annular groove is the pitch greater than 2 times said fine thread, less than the pitch of 3 times said fine threads; The circular arc of annular groove cross section half warp is greater than groove width X, and annular groove place minimum diameter should be not less than the middle footpath of screw thread.This structure can reduce the stress mutation of the U-bolts of screw thread transition region greatly, improves the working life of U-bolts.
Transition portion is on the both sides circular arc and the middle part circular arc is smooth is formed by connecting, and the angle between the tangent line of said both sides circular arc is 140 degree.The middle cross section of transition portion is a waist shape.The width S of the middle cross section of transition portion be greater than 1.5 times shaft directly through D, less than 2 times shafts directly through D; The whole height H of transition portion is directly through D greater than 6 times shaft.Wherein prick fully flat part height h for waist type structure greater than 3 times shaft directly through D.It is benchmark with the inboard sideline of U-bolts all that this transition region is pricked flat.
Claims (3)
1. the leaf spring of heavy truck is used U-bolts; Comprise the body that is divided into three part U-bolts, wherein both side ends is a helical thread portion, and one section that is connected with helical thread portion is columniform shaft; The portion that is connected with the both sides shaft is respectively the transition portion of U-shaped, it is characterized in that:
Said helical thread portion is a fine thread, and the joint of helical thread portion and shaft is provided with annular groove, and the cross section of annular groove is a circular arc;
Said transition portion is on the both sides circular arc and the middle part circular arc is smooth is formed by connecting, and the angle between the tangent line of said both sides circular arc is 140 degree, and the middle cross section of transition portion is a waist shape.
2. the leaf spring of heavy truck according to claim 1 is used U-bolts, it is characterized in that: the groove width X of said annular groove is for the pitch greater than 2 times said fine thread, less than the pitch of 3 times said fine threads; The circular arc of annular groove cross section half warp is greater than groove width X, and annular groove place minimum diameter should be not less than the middle footpath of screw thread.
3. the leaf spring of heavy truck according to claim 1 is used U-bolts, it is characterized in that: the width of the middle cross section of said transition portion is the straight warp of shaft greater than 1.5 times, less than the straight warp of 2 times shafts; The whole height of transition portion is the straight warp of shaft greater than 6 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203462502U CN202251328U (en) | 2011-09-16 | 2011-09-16 | U-bolt for leaf spring of heavy duty truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203462502U CN202251328U (en) | 2011-09-16 | 2011-09-16 | U-bolt for leaf spring of heavy duty truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202251328U true CN202251328U (en) | 2012-05-30 |
Family
ID=46112577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203462502U Expired - Fee Related CN202251328U (en) | 2011-09-16 | 2011-09-16 | U-bolt for leaf spring of heavy duty truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202251328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2506467C1 (en) * | 2012-06-19 | 2014-02-10 | Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" имени С.П. Королева" | Attachment point of two objects |
-
2011
- 2011-09-16 CN CN2011203462502U patent/CN202251328U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2506467C1 (en) * | 2012-06-19 | 2014-02-10 | Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" имени С.П. Королева" | Attachment point of two objects |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The East Road in Baohe District of Hefei city of Anhui Province, No. 176 230022 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: The East Road in Baohe District of Hefei city of Anhui Province, No. 176 230022 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20190916 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |