BRMU8900182Y1 - CONSTRUCTIVE ARRANGEMENT INTRODUCED IN REAR SUSPENSION BOGIE TYPE WITH SPRING - Google Patents

Abstract

constructive arrangement introduced in bogie-type rear suspension with spring pivot. The present utility patent application relates to a constructive arrangement introduced in the spring-loaded pivot bogie rear suspension used in commercial vehicles, preferably trucks, made such that the suspension pivot (1) It is located between the two rear axles, is located over the spring to provide improved anchorage and also benefit from the constructive shape of the structural components connecting with the chassis, as well as favoring vehicle mounting conditions to reduce material consumption and of labor.

Description

(54) Title: CONSTRUCTIVE ARRANGEMENT INTRODUCED IN REAR SUSPENSION TYPE BOGIE

WITH SPRING PIVOT (51) Int.CI .: B60G 5/053; B60G 5/00; B60G 11/04 (73) Holder (s): RANDON S / A IMPLEMENTS AND PARTICIPATIONS (72) Inventor (s): REMI PIZZETA; DANIEL LUÍS BONIATTI

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CONSTRUCTIVE ARRANGEMENT INTRODUCED IN REAR SUSPENSION

BOGIE TYPE WITH PIVOT ON THE SPRING [0001] The present utility model patent application refers to a constructive provision introduced in a bogie rear suspension with a pivot on the spring used in commercial vehicles, preferably in trucks, made in such a way that the articulation pivot of the suspension, which is located between the two rear axles, is placed on the spring to provide an improvement of the anchorage and also benefit the constructive form of the structural components of connection with the chassis, as well as favor the conditions of mounting on the vehicle , reducing the consumption of materials and labor.

[0002] In the constructive arrangement introduced in a bogie-type rear suspension with pivot on the spring, devices are provided, such as a split bearing in the pivot for the suspension articulation, a seat on the spring with a geometric shape that provides an improvement in the conditions of suspension stiffness in cases where greater flexibility and comfort is required, and a bushing of said bearing with elastomers.

BACKGROUND TO THE MODEL [0003] The bogie type suspensions are, by concept, of two axles, equipped with two bundles of central springs, one on each side of the chassis, and tie rods that serve as longitudinal support of the axles. They have the characteristic of having a good load distribution between the axles, being more used for application in trucks

Petition 870170053233, of 7/27/2017, p. 8/19

2/7 traction on the two rear axles called 6 x 4, to ensure the grip of the tires.

[0004] In addition, bogie-type suspensions are used for severe applications due to the need to reduce the time and frequency with maintenance, generating a greater availability of the vehicle to run.

[0005] Rear bogie suspensions for trucks known from the prior art have the articulation pivot located at the bottom of the spring. They are generally designed with one-piece cylindrical bearings, mounted on metal bushings, bearings or elastomeric bushings.

[0006] The pivot located at the bottom of the spring in bogie rear suspensions for trucks, is usually positioned in a distant region and well below the chassis, due to the space and conditions provided by the vehicle's structural arrangement, thus making construction difficult. of the anchor frame with the chassis, which supports the spring articulation bearing in the suspension.

[0007] The bearings of said suspensions of cylindrical and one-piece concept, as revealed in the state of the art, whether with metal bushings, bearings or elastomers, hinder the process of assembly and disassembly in the vehicle, since they only allow their movement and displacement laterally. to the chassis. To be disassembled in the event of maintenance on the vehicle, it is necessary to remove the wheels.

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3/7 [0008] US6206407 B1 is a patent that illustrates an example of a bogie rear suspension for trucks, in which a concept of articulation of the suspension between the two axles at the top of the spring is described, which is not properly a pivot, since it is built in such a way that the spring articulation is caused by elastic deformation, by a cushion with several layers of elastomers, interconnected by metallic plates.

[0009] In the suspension described above, the bearing concept is idealized in a complex way, which requires for its manufacture, the use of complex technologies and processes with high costs.

[00010] The aforementioned document also shows a system for fixing the bearing to the chassis using fasteners or screws, which have the disadvantage of hindering the process of mounting on the vehicle, by requiring an approximation and precise alignment to coincide with the housing holes. on the stand.

[00011] It is noteworthy that for the assembly of the aforementioned bearing on the chassis support, it is necessary to use special means and tools, appropriate to move the bearing until it coincides with the housing holes in the support, still aggravated by the residual distortion resulting from the characteristic of elastic memory that normally results from the manufacturing process, requiring the assembler an additional effort to correct it, making the assembly process difficult and costly.

[00012] Among the inconveniences found in the bogie rear suspensions for trucks of the

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4/7 state of the art, we highlight as the most relevant to the constructive difficulty of anchoring the spring articulation pivot with the chassis, due to the fact that it is positioned under the spring that is far from the chassis, which requires a more complex construction, with greater consumption of material and processes for its manufacture, still requiring highly trained labor.

[00013] Another inconvenience presented in the bogie rear suspensions for trucks currently used is the difficulty of assembling the set of pivot springs in the support with the chassis, causing waste and time spent with more steps in the assembly process and the need for specific devices .

[00014] It is therefore a necessity of the state of the art to provide a new concept of bogie rear suspension for trucks, whose spring articulation pivot is located closer to the chassis, in order to facilitate the construction of the spring anchorage with the chassis and other structural components.

[00015] This new constructive form will also contribute to improve the conditions for mounting the suspension on the vehicle, since it also allows the use of a split bearing, adding the possibility of vertical mounting of the spring on the vehicle.

[00016] The incorporation of the constructive form in the geometry of the bearing seat with the spring, also provided by the new location of the pivot, allows the reduction of the rigidity and weight of the suspension, as well as an improvement in the conditions of comfort in the vehicle.

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5/7 [00017] Pivot bearing bushing with elastomer is a variant that provides a longer service life, in addition to contributing to dampen the vibrations transmitted by the ground to the vehicle.

MODEL OBJECTIVES [00018] The main purpose of this utility model patent application is to provide a bogie rear suspension for trucks with the pivot on the spring to favor the structural construction of the anchoring of the articulation support and connection with the chassis, making it possible to reduce the weight of these components, reducing their wear, as well as reducing the frequency of maintenance and material expenses.

[00019] Another objective is to facilitate the process of mounting the suspension on the vehicle, with greater freedom of movement of the spring to be housed in the support bearing with the chassis, as well as improving the vehicle's comfort conditions.

DESCRIPTION OF THE FIGURES [00020] Figure 1 - Perspective view of the bogie rear suspension with pivot on the spring object of the present utility model patent application;

[00021] Figure 2 - Perspective view of a bogie rear suspension with pivot under the spring, used on trucks, according to the state of the art;

[00022] Figure 3 - Exploded perspective view of the pivot on the spring with a split bearing, of one of the modalities, object of the present patent application;

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6/7 [00023] Figure 4 - Front view of the split bearing and the seat on the spring with the constructive form of a modality to improve flexibility and comfort conditions in the suspension, object of the present patent application.

DETAILED DESCRIPTION OF THE MODEL [00024] In accordance with what the attached figures illustrate, this CONSTRUCTIVE ARRANGEMENT INTRODUCED IN REAR SUSPENSION, BOGIE TYPE WITH PIVET ON THE SPRING, basically consists of a bogie rear suspension used on trucks, provided with arms tie rods that serve for the longitudinal support of the axles, whose spring bundles are arranged on each side of the vehicle chassis between the two axles, made in such a way that the articulation pivot (1) is arranged on the spring (2), and fixed laterally to the chassis (3) and / or to the support (4), which structurally connects the chassis to the spring by means of an anchor pin (5).

[00025] Said articulation pivot (1) consists of a split bearing (6, 7), coated with a split bushing (8), made of elastomeric material, mixed with elastomeric metal or any other material with equivalent characteristics, and an anchoring pin (5) is also provided in the central part of said pivot (1), which is fixed on the spring (2), using clamps (10) or any other means of fixation.

[00026] In one of the modalities of the present utility model, in cases where said suspension requires greater flexibility and comfort, a

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7/7 seat (9), between the semi-bearing (7) and the spring (2), or integrated with said bearing or spring, whose geometric shape provides a reduction in the suspension stiffness, due to the reduction of the support area on said spring.

[00027] In practice, the bogie-type rear suspension for trucks with pivot on the spring provides a significant reduction in material costs, due to the weight reduction of the structural components connecting the chassis with the spring and the spring itself, in addition to the reduction maintenance time and frequency, generating greater availability for the vehicle to run.

[00028] In addition, the claimed constructive arrangement provides a reduction in labor costs, as it facilitates assembly on the vehicle due to the split bearing.

[00029] It will be easily understood by those skilled in the art that modifications can be made to the present model without thereby escaping the concepts set out in the preceding description. These modifications must be considered as included within the scope claimed in the present model. Consequently, the particular embodiments described in detail above are only illustrative and not limiting as to the scope of the present model, which must be given the full extent of the attached claims and any and all equivalents thereof.

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Claims (1)

CLAIM 1. Constructive arrangement introduced in bogie-type rear suspension with pivot on the spring, preferably used on trucks, basically consisting of a set of longitudinal axle support arms, two central spring bundles (2) arranged on each side of the chassis ( 3) including an articulation pivot (1) between the two axes, which it is positioned on the spring (2) and is constituted per a bearing bi-party (6, 7) , characterized by the fact of pivot in articulation (1) be fixed laterally to chassis (3) and support (4), and be coated with a split bushing (8), provided in the central region of said pivot (1), an anchor pin (5) fixed laterally to the chassis (3) and the support (4), and a seat (9) whose geometry has a reduced support area on the spring (2), said articulation pivot (1) being fixed to said spring (2) by means of clamps (10). Petition 870170086861, of 11/10/2017, p. 7/10 1/4