Motor vehicle equipped with an electric compressor on a filter cradle
By integrating an electric compressor with a filtering cradle featuring solidary fingers and filter studs, the issue of vibration-induced noise in motor vehicles is addressed, achieving effective noise reduction without increasing vehicle size or cost.
Patent Information
- Application Number
- FR2023004923
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2023-05-17
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2043-05-17
AI Technical Summary
Existing motor vehicles with electric compressors face challenges in effectively filtering vibrations, which leads to noise perception in the passenger compartment, and current solutions require additional volume, weight, and cost due to the need for intermediate supports.
The implementation of an electric compressor mounted on a filtering cradle with solidary fingers and filter studs, which are inserted into corresponding openings in the cradle, providing effective vibration filtration while maintaining a compact and cost-efficient design.
This solution effectively limits the transmission of vibrations from the electric compressor to the motor vehicle, reducing noise in the passenger compartment while minimizing additional volume, weight, and cost.
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Abstract
Description
Title of the invention: Motor vehicle equipped with an electric compressor on a filter cradle technical field
[0001] The invention has as its technical field the supports for vibrating elements, and more particularly the filter supports for such vibrating elements. Previous techniques
[0002] In an electric vehicle, the air conditioning compressor is electrically powered, whereas in a thermal vehicle it is powered by an accessory belt.
[0003] The introduction of new air conditioning gases, such as CO2 or propane, has led to a modification of the operating cycles of air conditioning compressors, associated with an increase in the vibrations generated.
[0004] There is therefore a need for vibration filtering of an electric compressor for a motor vehicle, in order to limit the noise perceived in the passenger compartment. The addition of such filtering requires the use of an intermediate support which results in additional volume, weight, and cost.
[0005] From the prior art, we know of document FR3059733 disclosing compressor insulation, comprising a proprietary fastening system and involving a large number of add-on parts. This document proposes a large and expensive system.
[0006] There is therefore a need for vibration filtering of an electric compressor for motor vehicles, in order to limit the noises perceived in the passenger compartment, which has limited size and cost. Description of the invention
[0007] The invention relates to a motor vehicle comprising an electric compressor equipped with a housing. The electric compressor comprises at least three fingers attached to the housing, at least three filter pads, each comprising an axial bore made to allow the insertion of a finger, the electric compressor being disposed in a cradle comprising an upper part and a lower part, the cradle being intended to be attached to the motor vehicle, the cradle being provided with openings into which the filter pads are inserted, the upper and lower parts of the cradle being joined by means of at least one clamping element so as to hold the filter pads in place, the filter pads limiting the vibrations of the electric compressor transmitted to the motor vehicle through the cradle.
[0008] The filter pads and corresponding openings may be cylindrical in shape.
[0009] The filter pads may include a radial shoulder on at least one of their faces, the corresponding openings may include at least one countersink made to accommodate at least one radial shoulder.
[0010] The clamping element may be a screw inserted into a slot provided in the upper part of the cradle and cooperating with a threaded hole provided in the lower part of the cradle.
[0011] The opening in the upper part can be fitted with a thread.
[0012] The openings of the cradle may include at least three partial openings provided in the upper part of the cradle, and / or at least three partial openings provided in the lower part of the cradle.
[0013] The cradle may include at least one joint having a curved finger attached to the upper part of the cradle and a corresponding slot provided in the lower part of the cradle, designed so that the curved finger is inserted into the corresponding slot in order to guide the rotation of the upper part of the cradle until it contacts the lower part of the cradle, the clamping element being disposed in the distal part of the cradle relative to the joint.
[0014] The cradle may include two joints.
[0015] The invention also relates to a method for assembling a motor vehicle as described above, comprising the following steps:
[0016] • a filter pad is installed on each finger,
[0017] • The compressor is installed in the lower part of the cradle so that each the filter element should be placed in the corresponding partial opening,
[0018] • the upper part of the cradle is then positioned so that the openings partial openings should be aligned with the partial openings made in the lower part of the cradle,
[0019] • the two parts of the cradle are joined together, inserting at least two elements of tightening in the spaces provided in the cradle.
[0020] Another object of the invention is a method for assembling a motor vehicle comprising at least one joint and as described above, comprising the following steps:
[0021] • a filter pad is installed on each finger,
[0022] • The compressor is installed in the lower part of the cradle so that each the filter element should be placed in the corresponding partial opening,
[0023] • the upper part of the cradle is then positioned so that at least one finger curved, either positioned at the entrance of the corresponding light,
[0024] • the upper part of the cradle is lowered so that the partial openings be aligned with the partial openings made in the lower part of the cradle,
[0025] • the two parts of the cradle are joined together by inserting at least one clamping element the light provided in the cradle. Brief description of the drawings
[0026] Other objects, features and advantages of the invention will become apparent from the following description, given solely by way of non-limiting example and made with reference to the accompanying drawings in which:
[0027] - Figure [Fig. 1] is a bird's-eye view illustrating a compressor equipped with a filtering cradle according to a first embodiment of the invention,
[0028] - Figure [Fig.2] is an exploded view illustrating the compressor equipped with a cradle filtering according to a first embodiment of the invention,
[0029] - Figure [Fig. 3] is a bird's-eye view illustrating a compressor equipped with a filtering cradle according to a first embodiment of the invention in the open position, and
[0030] - Figure [Fig. 4] is a bird's-eye view illustrating the compressor equipped with a cradle filtering according to a second embodiment of the invention. Detailed description
[0031] Figure [Fig. 1] illustrates an electric compressor 1 for a motor vehicle. The electric compressor 1 comprises a housing 2 equipped with at least three fingers 2a, 2b, 2c, each designed to cooperate with a filter pad 3a, 3b, 3c. A filter pad comprises a core made of an elastically deformable material such as rubber or elastomer, having an axial bore formed to allow the insertion of a finger 2a, 2b, 2c.
[0032] The electric compressor 1 is arranged in a cradle 4a,4b in two parts.
[0033] The cradle 4a,4b comprises an upper part 4a, rotationally connected to a part lower 4b by two joints 5, the lower part 4b being integral with the structure of the motor vehicle.
[0034] The cradle 4a,4b is provided with an opening opposite each finger 2a,2b,2c, designed to accommodate each one a filter pad 3a,3b,3c. In a particular embodiment, the openings and the corresponding filter pads 3a,3b,3c have an advantageous cylindrical shape due to the simplicity of their manufacture and installation.
[0035] Each joint 5 is designed to allow rotation of the upper part 4a of the cradle towards the lower part 4b of the cradle while also allowing separation. Each joint 5 cooperates with a clamping element 7 located in the distal part of the cradle 4a,4b relative to the joints 5 in order to secure the upper part 4a with lower part 4b. Note that the clamping element 7 is offset from the plane of symmetry of the distal part so as not to interfere with the filter pad 3b and the corresponding opening. The offset can be to the left or right of the plane of symmetry.
[0036] The clamping element 7 is, in particular, a screw inserted into a slot in the upper part 4a of the cradle and cooperating with a threaded hole in the lower part 4b of the cradle. The upper part 4a may also be threaded. Alternatively, the clamping element 7 is a bolt / nut or threaded rod / nut assembly inserted into two slots in the lower and upper parts of the cradle. Here too, the slot in the upper part 4a and / or the slot in the lower part 4b may be threaded.
[0037] It will also be understood that other clamping elements can be arranged, in particular in the lateral parts of the cradle, between the joint 5 and the distal part.
[0038] Figure [Fig.2] is an exploded view of the compressor 1 according to the first embodiment. The elements in common with those illustrated in Figure [Fig.1] bear the same reference numerals and are not described again for the sake of brevity.
[0039] Compared to figure [Fig.1], figure [Fig.2] illustrates more precisely partial openings 6aa,6ab,6ac made in the upper part 4a, partial openings 6ba,6bb,6bc made in the lower part 4b of the cradle, as well as parts of the joint 5.
[0040] Each opening intended to receive a filter pad 3a, 3b, 3c is formed by matching a partial opening 6aa, 6ab, 6ac provided in the upper part 4a of the cradle with a partial opening 6ba, 6bb, 6bc provided in the lower part 4b of the cradle. In different embodiments, the openings are made so as to extend essentially into the lower part 4b of the cradle, into the upper part 4a of the cradle, or into both parts 4a, 4b of the cradle.
[0041] The joint 5 is also visible and comprises a curved finger 5a attached to the upper part 4a of the cradle and a corresponding slot 5b in the lower part 4b of the cradle. During assembly, the curved finger 5a is inserted into the corresponding slot 5b so as to guide the rotation of the upper part 4a of the cradle until it contacts the lower part 4b of the cradle. When a curved finger 5a and a corresponding slot 5b are provided on each side of the compressor, the arrangement has the additional advantage of keeping the upper part 4a of the cradle aligned with the lower part 4b of the cradle.
[0042] Reference 8b designates the threaded hole or light in the lower part 4b of the cradle, into which the clamping element 7 is inserted.
[0043] Figure [Fig. 3] illustrates the open cradle 4a, 4b. The elements common with the The elements illustrated by Figure [Fig. 1] and Figure [Fig. 2] bear the same reference numerals.
[0044] With the cradle 4a, 4b open, reference numeral 8a designates the threaded hole or opening made in the upper part 4a of the cradle and into which the clamping element 7 is inserted, is shown.
[0045] Assembling the compressor 1 in the cradle 4a, 4b then consists of installing a filter pad 3a, 3b, 3c on each finger 2a, 2b, 2c, and then installing the compressor 1 in the lower part 4b of the cradle so that each filter pad 3a, 3b, 3c is positioned in the corresponding partial opening 6ba, 6bb, 6bc. The upper part 4a of the cradle is then positioned so that at least one curved finger 5a is positioned at the entrance of the corresponding opening 5b. The upper part 4a of the cradle is then lowered onto the lower part 4b of the cradle until contact occurs, and so that the partial openings 6aa, 6ab, 6ac provided in the upper part 4a of the cradle are aligned with the partial openings 6ba, 6bb, 6bc provided in the lower part 4b of the cradle. The filter pads 3a, 3b, 3c cannot then move. The two parts 4a, 4b of the cradle are then joined by inserting and screwing at least one clamping element 7.
[0046] A filter pad 3a, 3b, 3c is defined as comprising two circular faces and a surface of revolution extending between the two circular faces. In a particular embodiment, a filter pad 3a, 3b, 3c is provided with a radial shoulder on at least one of its circular faces. Each shoulder allows the filter pad 3a, 3b, 3c to be centered in the corresponding opening of the cradle 4a, 4b, particularly when a suitable countersink is made on the edge of each partial opening 6aa, 6ab, 6ac, 6ba, 6bb, 6bc. Such a countersink is visible in Figure [Fig. 2] and Figure [Fig. 3].
[0047] Figure [Fig.4] illustrates an alternative embodiment in which the cradle 4a,4b is held closed by at least two clamping elements, arranged on either side of the compressor 2. In Figure [Fig.4], only one of these two clamping elements, referenced 7b, is visible.
[0048] Assembling the compressor 1 in the cradle 4a, 4b is similar to the assembly according to the first embodiment and consists of installing a filter pad 3a, 3b, 3c on each finger 2a, 2b, 2c, then installing the compressor 1 in the lower part 4b of the cradle so that each filter pad 3a, 3b, 3c is positioned in the corresponding partial opening 6ba, 6bb, 6bc. The upper part 4a of the cradle is then positioned so that the partial openings 6aa, 6ab, 6ac correspond with the partial openings 6ba, 6bb, 6bc provided in the lower part 4b of the cradle. The filter pads 3a, 3b, 3c cannot then move. The two parts 4a, 4b of the cradle are secured by inserting and screwing the at least two clamping elements 7a, 7b.
[0049] It should also be noted that in a particular embodiment of this second embodiment, a two-part leg is formed between the upper part 4a and the lower part 4b of the cradle, directly above each clamping element 7a, 7b, so that each clamping element has a significant length with a thread. This has the effect of increasing the clamping force of each clamping element and increasing its holding power when the compressor 1 vibrates.
Claims
Claims
1. Motor vehicle comprising an electric compressor (1) provided with a covering (2), characterized in that the electric compressor (1) comprises at least three fingers (2a, 2b, 2c) secured to the covering (2), at least three filter pads (3a, 3b, 3c), each comprising an axial hole made so as to allow the insertion of a finger (2a, 2b, 2c), the electric compressor (1) being arranged in a cradle (4a, 4b) comprising an upper part (4a) and a lower part (4b), the cradle (4a, 4b) being intended to be secured to the motor vehicle, the cradles (4a, 4b) being provided with openings in which the filter pads (3a, 3b, 3c) are inserted, the upper part (4a) and the lower part (4b) of the cradle being secured by means of at least one clamping element (7) so as to maintain the filter pads (3a, 3b, 3c) in place, the filter pads (3a, 3b,3c) limiting the vibrations of the electric compressor (1) transmitted to the motor vehicle through the cradle (4a,4b).,
2. Motor vehicle according to claim 1, in which the filter pads (3a, 3b, 3c) and the corresponding openings are cylindrical in shape.
3. Motor vehicle according to claim 1 or 2, in which the filter pads (3a, 3b, 3c) comprise a radial shoulder on at least one of their faces, the corresponding openings comprising at least one countersink made to accommodate the at least one radial shoulder.
4. Motor vehicle according to any one of claims 1 to 3, in which a clamping element (7) is a screw inserted into a slot provided in the upper part (4a) of the cradle and cooperating with a threaded hole provided in the lower part (4b) of the cradle.
5. A motor vehicle according to claim 1, wherein the light provided in the upper part (4a) is provided with a thread.
6. A motor vehicle according to any one of claims 1 to 5, wherein the cradle openings (4a, 4b) comprise at least three partial openings (6aa, 6ab, 6ac) provided in the upper part (4a) of the cradle, and / or at least three partial openings (6ba, 6bb, 6bc) provided in the lower part (4b) of the cradle.
7. Motor vehicle according to any one of claims 1 to 5, in which the cradle (4a, 4b) comprises at least one articulation (5) provided with a curved finger (5a) integral with the upper part (4a) of the cradle and a corresponding light (5b) provided in the lower part (4b) of the cradle, designed so that the curved finger (5a) is inserted into the corresponding light (5b) in order to guide the rotation of the upper part (4a) of the cradle until it contacts the lower part (4b) of the cradle, a clamping element (7) being arranged in the distal part of the cradle (4a,4b) relative to the joint (5).
8. Motor vehicle according to claim 7, in which the cradle (4a, 4b) comprises two articulations.
9. Method for assembling a motor vehicle according to any one of claims 1 to 6, comprising the following steps: • a filter pad (3a, 3b, 3c) is installed on each finger (2a, 2b, 2c), • the compressor 1 is installed in the lower part (4b) of the cradle so that each filter pad (3a, 3b, 3c) is arranged in the corresponding partial opening (6ba, 6bb, 6bc), • the upper part (4b) of the cradle is then arranged so that the partial openings (6aa, 6ab, 6ac) are brought into correspondence with the partial openings (6ba, 6bb, 6bc) made in the lower part (4b) of the cradle, • the two parts (4a, 4b) of the cradle are secured by inserting the at least two clamping elements (7a, 7b) into the slots made in the cradle (4a, 4b).
10. Method for assembling a motor vehicle according to any one of claims 7 or 8, comprising the following steps: • a filter pad (3a, 3b, 3c) is installed on each finger (2a, 2b, 2c), • the compressor 1 is installed in the lower part (4b) of the cradle so that each filter pad (3a, 3b, 3c) is arranged in the corresponding partial opening (6ba, 6bb, 6bc), • the upper part (4a) of the cradle is then arranged so that the at least one curved finger (5a) is arranged at the entrance of the corresponding light (5b), • the upper part (4a) of the cradle is lowered so that the partial openings (6aa, 6ab, 6ac) are brought into correspondence corresponding to the partial openings (6ba, 6bb, 6bc) provided in the lower part (4b) of the cradle, the two parts (4a, 4b) of the cradle are secured by inserting at least one clamping element into the opening provided in the cradle (4a, 4b).