Spring plate of combined profile (versions) and spring (versions) using spring plate

FIELD: machine building.

SUBSTANCE: spring plate of combined profile has thick central part with central platform, thin end parts of continuous profile and working parts positioned between central and end parts. The working parts are made out of combination of parts of continuous profile adjacent to the central part and of parts of alternate profile adjacent to the end parts. Distance between their dividing cross sections on both arms of the plate is equal to working length of the following spring of a short plate in a package. According to the second version an additional distinguished feature of the spring plate is like follows: working parts of continuous profile adjacent to the central part have thickness equal to thickness of the central part. The combined spring has several spring plates. Also, the root plate has a combined profile, while the last plate has an alternate profile. The spring plates contact each other along projection of the central platform and ends of the last plate of alternate profile. Thickness of the central part of the plate of combined profile is equal to thickness of the last plate of alternate profile. Few-plates trapezoidal spring consists of a package of overlaid plates of combined profile with step-by-step decreasing working length and of a following plate of alternate profile. All plates contact each other along whole plane of contact. A combined two-step spring includes a main spring and an additional spring set in a lower position. The main spring consists of plates of similar combined profile where distance between cross sections dividing working parts of continuous and alternate profile on both arms of the plate is equal to working length of the additional spring.

EFFECT: raised efficiency of metal use.

5 cl, 6 dwg

 

The invention relates to the field of engineering, namely the elastic elements of the suspension of vehicles.

It is known that the spring leaf is an element of the leaf springs, which, in turn, is elastic suspension elements of a vehicle. The simplest form of spring sheet is a sheet of constant cross section. The spring may consist of one such sheet, but this design due to the uneven stress distribution (figure 1 line VAV') and, as a consequence, the low utilization rate of the material (Kthem~11%) is not rational. The uniform distribution of stresses andthemin this sheet typically increase by location for this sheet with shorter length. When this initial stress plot takes the form of a line BCC'B', and the difference between the intervals of CENTURIES' and XCXC'equal to the difference of working lengths specified adjacent sheets. But this sheet to improve Tothemneeds to them that followed a shorter list. This package springs, composed of sheets of uniform cross section with successively decreasing length, as it is known, is called the trapezoidal springs. The characteristic property of such springs is mandatory in the absence of the gap between the sheets. To improve Tothemby reducing the difference of the lengths of leaves number of leaves increase the offer, that gave the second name of the trapezoidal springs as multi [Argilovski I.G. Automotive leaf springs. - M.: Mashinostroenie, 1978, pagination 126-127 lists the types odnolistovymi springs; s - few-sheet types of springs; p.142 - type multi-leaf springs]. This obvious disadvantage of using sheets of a constant profile: high intensity of springs and the low utilization rate of the metal.

Known spring leafs AC profile characterized by three types of areas: the Central area of the permanent profile maximum thickness along the length equal to the area of the sealing springs on the vehicle, the working parts of a variable section and end sections permanent profile with minimum sheet thickness. Unlike sheets of constant cross-section uniformity of the stress distribution in this sheet is provided by changing the thickness of a sheet of on-site AC profile (plot BDD'B' in figure 1), and not as a result of the effects of two opposite direction and shifted by a distance equal to the difference of the lengths of the sheets forces. Large bending moment on each of the shoulders of the sheet creates exclusively one force, located at the point In the front of the shoulder and the point In' to the rear shoulder of the sheet. This fact predetermined the design springs from sheets of variable profile with ed is Noy working lengths for all sheets of the package springs. A function of thickness change on site, with views of the parabola, such springs are called parabolic, and because of the small number of sheets is their second name - maloletnymy [Gorelik A. M. Leaf springs. - M.: Neonatorum, S. 1981]. The characteristic property of such springs is required gap between the sheets.

Comparing plots BDD'B' and BCC'B', it is seen that at the same level as the maximum stress area under the broken BDD'B' is greater and, therefore, the factor Kthemmalahitovoy springs is much higher than the multi-leaf springs. This circumstance provides an undeniable advantage of the few-sheet springs over multi. But design few-sheet springs are not always efficient: design of springs often make a composite of two springs, one of which is primary, and the other more in the lower position with a shorter working length (Iremel. The chassis of the vehicle. The suspension elements. - M.: Mashinostroenie, 1987, s). In this case, if the main spring is a leaf, the point of transferring the load from the secondary spring is displaced, as in the case of trapezoidal spring. This plot takes the form of a broken BDCOC'D B', which is significantly less than the original shape BDD'B'. Thus, a significant disadvantage of spring sheet AC prof is La: the design of the springs with their use of the available extension points transfer the load (for example, additional springs in the lower position) in the design of a composite leaf springs leads to a distortion of the stress state of the sheet AC profile and the loss of positive properties, including in the form of a sharp reduction in the utilization rate of material Tothem. Therefore, the main spring in practice is made from sheets of a constant profile, which is not optimal.

From the patent literature known composite leaf spring, which consists of sheets of constant and variable cross-section and of constant profile made indigenous sheets, i.e. sheets longer than the estimated length of the springs and of the AC - other non-sheets, and the sheets of variable cross-section uniform along the length and profile, and the load is served at their ends, and the length of the sheets of a constant current profile in each of the consoles external load P and the reaction of the non-sheets form a couple of forces, equal in magnitude, opposite in direction and are displaced along the sheet relative to each other at a distance of L for education indigenous sheets of pure bending with uniformly distributed bending moment RL (RF application No. 94028498, IPC F16F 1/18, publ. 20.03.96 year). In fact, it is also an integral spring (upper and lower part can be considered as a separate multi - leaf springs), but parts simultaneously (no ZAZ the RA between the springs) so there is no multi-stage system. Therefore, as a component, the spring of this design also suffers from the aforementioned disadvantages. For this reason, as indigenous sheets taken leaves permanent type and not a variable. This spring is used as a prototype.

For the proposed composite spring is used as a prototype two-stage spring (Iremel. The chassis of the vehicle. The suspension elements. - M.: Mashinostroenie, 1987, s). Spring rear suspension of the car is made in the form trehlistovoy keystone, which bending is based on odnolistovoy the spring of the second stage. The disadvantage of this spring is used as part of the main springs of sheets of a constant profile, which reduces the uniformity of the stress distribution and the value of the coefficient of use of the material.

The objective of the invention is the development of leaf sheets of an original design, based on which set of options sprung free from the shortcomings of the prototype.

The problem is solved with the help of a group of inventions:

The problem is solved using the characteristics listed in the 1st paragraph of the claims, in common with the prototype, such as spring sheet composite profile having a thick Central section with a Central, thin the ends of the permanent profile and working phase is, located between the Central and end sections, and a distinctive, essential features, such as work sites, made from a combination adjacent to the Central plot plots a constant profile and adjacent to the end portions of sections of variable cross-section, and the distance between them dividing cross sections on both shoulders of the sheet is equal to the working length of the subsequent package springs short list.

The above set of essential features allows to obtain the following technical result:

- on paragraph 1 of the claims: increase the utilization of metal, creating new designs of springs of vehicles.

- like springs of sheets of variable profile, the design of the springs using a sheet of the combined profile of this design assumes the gap and the lack of contact on the working portion of constant thickness, which increases durability, but because of the lack of milesowego reduces friction damping properties of the spring.

The problem is solved using the characteristics listed in the 2nd paragraph of the claims, in common with the prototype, such as spring sheet of the combined profile made under paragraph 1 of the claims, and distinctive, essential features, such as adjacent to the Central section of the working areas of the permanent profile is made thick, equal to the thickness of the Central section.

The above set of essential features allows to obtain the following technical result:

- item 2 claims: increase the utilization of metal, creating new designs springs vehicles

- like springs of sheets of a constant profile, the design of the springs using a sheet of the combined profile of this design assumes no gap and the presence of full contact on the working portion of constant thickness that allows

1) due to the presence of milesowego friction to improve the damping properties of the spring;

2) in the movement of the point of reaction of the following sheet in the plane of the work area permanent profile smoothly change the elastic properties of a spring.

The problem is solved by the characteristics mentioned in the 3rd paragraph of the claims, in common with the prototype, such as combined spring containing several spring leaves, and distinctive, essential features, such as indigenous sheet is made under paragraph 1 of the claims, and the last sheet is made of a variable section which are in contact with each other on the projection of the Central site and all of the last sheet of a variable profile, and the thickness of the Central section of the sheet combiner the bath profile is made equal to the thickness of the last sheet of a variable profile.

The above set of essential features allows to obtain the following technical result:

- item 3-the claims at the expense of abandoning the use of sheets of a constant profile increase the utilization of metal, reliability, by equalizing the stresses in the Central section of the spring.

The problem is solved by the characteristics mentioned in the 4th paragraph of the claims, such as leaf trapezoidal spring, characterized in that the package springs contains superimposed on each other with decreasing step-by-step working length of the leaves combined profile made under paragraph 2 of the claims, and the subsequent sheet of a variable profile in contact with each other along the plane of contact.

The above set of essential features allows to obtain the following technical result:

- section 4 of the claims: increase the utilization of the metal, reducing the metal.

The problem is solved by the characteristics mentioned in the 5th paragraph of the claims, in common with the prototype, such as a compound two-stage spring including a main spring and an additional spring located in the lower position and having a working length is shorter than the working length of the main spring, and distinctive, essential features, such as the main spring, consists of sheets of the same combined profile made under paragraph 2 of the claims, with the distance between the cross sections, separating the working parts of the DC and AC profile on both shoulders of the sheet equal to the working length of the optional springs.

The above set of essential features allows to obtain the following technical result:

- item 5 claims: increase the utilization of metal, except the Assembly stresses, ensuring optimal ride vehicle according to the schedule of progressive elastic properties due to the gradual inclusion of additional springs.

Thus, the technical result of invention consists in the combination of the advantages of the leaves of the DC and AC profile and the exclusion of their disadvantages, namely: increase the utilization of metal to sheet parabolic profile, but in contrast to the simultaneous receipt of the constructive possibilities of the use of the trapezoidal shape of the springs as the springs of the sheets of a constant profile. The versatility of spring sheet of the combined profile gives the possibility of obtaining new original design and the development of solutions for the development of leaf springs.

The invention is illustrated by the following drawings.

Figure 1 presents the diagram of voltages spring sheet; figure 2 - leaf sheet: (a) front view, b) top view (option 1); figure 3 - leaf sheet: in) front view, top view (2nd option); figure 4 is a combined spring, front view (1st option springs); figure 5 - leaf trapezoidal spring: (a) front view, (b) bottom view (2nd option springs); figure 6 - composite two-stage leaf springs, front view (The 3rd option springs).

Sheet (option 1)

Spring leaf combined profile (figure 2) has a thick Central section AA1with the Central area Lethin the ends of the permanent profile BD and D1B1and working areas DA and A1D1located between the Central and end sections. Working parts are made of combination adjacent to the Central plot plots a constant profile of SA and1With1and adjacent to the terminal region phase variable profile DC and C1D1, and the distance L between them dividing cross sections C and1on both shoulders of the sheet is equal to the working length of the subsequent package springs short list.

Sheet (option 2)

Spring sheet of the combined profile is made under paragraph 1 of the claims (option 1), one is about adjacent to the Central area AA 1working areas SA and1With1permanent profile is made of a thickness equal to the thickness of the Central section.

Changing the shape of the sheet from the AC to the sheet of the combined profile is allowed to optimize its stress state: plot of the stresses in the sheet of the combined profile adequate plot sheet AC profile, i.e. has (see figure 1) form BDD'B', but unlike sheet AC profile equal voltages at site SS' is provided as the sheet of constant profile, end forces from the subsequent sheet, and on the sites of DC and C D', as the sheets of variable profile, by changing the thickness of the sheet.

Spring (option 1)

Combined spring (figure 4) contains several spring leaves. Radical sheet 1 is made pursuant to paragraph 1 of the claims, and the last sheet 2 is made variable profile, while the sheets are in contact with each other on the projection of the Central site and all of the last sheet of a variable profile, and the thickness h of the Central section of the sheet of the combined profile is made equal to the thickness h1the last sheet of a variable profile. Here is the original design dvuhslotovoj combination of springs made of sheet 1 of the combined profile for option 1 (the root page) and sheet 2 AC profile. When this access is presumed goal alignment stresses in the Central section of the spring, since the thickness of the Central section of the sheet of the combined profile is taken equal to the thickness of the Central section of the sheet AC profile.

Spring (option 2)

Leaf trapezoidal spring (figure 5), characterized in that the package springs contains superimposed on each incrementally reduce the working length of the leaves combined profile 1 made under paragraph 2 of the claims, and the subsequent sheet AC profile 2 in contact with each other along the plane of contact. Here is the original design of malahitovoy trapezoidal springs. The last sheet of such springs of variable profile, and the rest combined for option 2. Here clearly demonstrated the advantages of using sheets of a combined profile: trapezoidal spring, which cannot be done solely of sheets of variable cross-section; a spring leaf that it is unreasonable to make sheets of constant profile. The value of L for sheets # 1 and # 2 takes respectively the values of L1and L2.

Spring (option 3)

Compound two-stage spring (6) includes a main spring 1 and the additional spring 2, located in the lower position and having a working length is shorter than the working length of the main spring. The main spring is composed of sheets of Odincovo the combined profile, made under paragraph 2 of the claims, with the distance L between the cross sections, separating the working parts of the DC and AC profile on both shoulders of the sheet equal to the working length of the optional springs.

Equal thicknesses between work areas and the Central area of the sheets of the combined profile does not mean their complete fusion: these sites have different contours of the bend, resulting in the Central area Lethe Central plot remains flat, which eliminates the extra voltage when setting the seal on the spring. No gap between the work stations of the permanent profile adjacent sheets of the combined profiles in the process of loading and selection of the gap between primary and secondary springs gradually (smoothly) to include the work of an additional spring. It forms a smooth nonlinear progressive form of the elastic characteristics of the spring, optimally ensure the smooth running of the vehicle.

Photography of the natural sample composite leaf springs described construction using the main spring sheets combined profile is shown in Fig.7.

From the description and practical application of the present invention to specialists will be obvious and other private forms of its implementation. This description and the examples races is matiauda as material, illustrating the invention, the essence of which and the scope of patent claims is defined in the following claims, a set of essential features and their equivalents.

1. Spring sheet composite profile having a thick Central section with a Central, thin the ends of the permanent profile and working areas located between the Central and end sections, wherein the working parts are made of combination adjacent to the Central plot plots a constant profile and adjacent to the end portions of sections of variable cross-section, and the distance between them dividing cross sections on both shoulders of the sheet is equal to the working length of the subsequent package springs short list.

2. Spring sheet composite profile having a thick Central section with a Central, thin the ends of the permanent profile and working areas located between the Central and end sections, wherein the working parts are made of combination adjacent to the Central plot plots a constant profile and adjacent to the end portions of sections of variable cross-section, and the distance between them dividing cross sections on both shoulders of the sheet is equal to the working length in subsequent pack is e springs short sheet, while adjacent to the Central section of the working areas of the permanent profile is made of a thickness equal to the thickness of the Central section.

3. Combined spring containing multiple leaf sheets, characterized in that the indigenous sheet according to claim 1, and the last sheet is made of a variable profile, while the sheets are in contact with each other on the projection of the Central site and all of the last sheet of a variable profile, and the thickness of the Central section of the sheet of the combined profile is made equal to the thickness of the last sheet of a variable profile.

4. Leaf trapezoidal spring, characterized in that the package springs contains superimposed on each incrementally reduce the working length of the leaves combined profile according to claim 2 and further sheet of a variable profile in contact with each other along the plane of contact.

5. Compound two-stage spring including a main spring and an additional spring located in the lower position and having a working length is shorter than the working length of the main spring, characterized in that the main spring is composed of sheets of the same composite profile according to claim 2 with the distance between the cross sections, separating the working parts of the DC and AC profile on both shoulders sheet, equal working the length of additional springs.



 

Same patents:

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Leaf spring // 2090789
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Leaf spring // 2457373

FIELD: transport.

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EFFECT: creation of leaf spring with improved damping properties.

2 cl, 5 dwg

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