Motor vehicle provided with an electric compressor on a filtering cradle
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2026-03-25
AI Technical Summary
The introduction of new air conditioning gases like CO2 or propane in electric vehicles increases compressor vibrations, leading to noise issues in the passenger compartment, which existing solutions fail to address effectively due to increased volume, weight, and cost constraints in limited spaces.
An electric compressor mounted on a filter cradle with three fingers and filter pads, secured by a clamping element, which limits vibrations through a cylindrical design with radial shoulders and countersinks, allowing for efficient noise reduction without excessive additional volume or weight.
The solution effectively reduces noise from compressor vibrations in electric vehicles by using a compact and cost-effective filter cradle system that secures the compressor, minimizing additional volume and weight while maintaining performance.
Smart Images
Figure EP2024061962_21112024_PF_FP_ABST
Abstract
Description
[0001] TITLE: Motor vehicle equipped with an electric compressor on a filter cradle
[0002] Technical field
[0003] The technical field of the invention is supports for vibrating elements, and more particularly filter supports for such vibrating elements.
[0004] Previous techniques
[0005] In an electric vehicle, the air conditioning compressor is powered electrically, whereas in a thermal vehicle it is powered by an accessory belt.
[0006] The introduction of new air conditioning gases, such as CO2 or propane, has led to a change in the operating cycles of air conditioning compressors, associated with an increase in the vibrations generated.
[0007] There is therefore a need for vibration filtration 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 generates additional volume, excess weight and additional cost.
[0008] From the state of the prior art, document FR3059733 is known, disclosing compressor insulation, comprising a proprietary fixing system and involving a large number of added parts. This document proposes a large and expensive system.
[0009] There is therefore a need for vibration filtration of an electric compressor for a motor vehicle, so as to limit the noise perceived in the passenger compartment, which has limited space and cost.
[0010] Statement of the invention
[0011] The subject of the invention is a motor vehicle comprising an electric compressor provided with a casing. The electric compressor comprises at least three fingers secured to the casing, at least three filter pads, each comprising an axial hole made so as to allow the insertion of a finger, the electric compressor being arranged in a cradle comprising an upper part and a lower part, the cradle being intended to be secured to the motor vehicle, the cradles being provided with openings in which the filter pads are inserted, the upper part and the lower part of the cradle being secured 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.
[0012] The filter pads and corresponding openings can be cylindrical in shape.
[0013] The filter pads may comprise a radial shoulder on at least one of their faces, the corresponding openings being able to comprise at least one countersink made to accommodate the at least one radial shoulder.
[0014] 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.
[0015] The light in the upper part can be fitted with a thread.
[0016] The cradle openings may include at least three partial openings provided in the upper portion of the cradle, and / or at least three partial openings provided in the lower portion of the cradle.
[0017] The cradle may comprise at least one articulation provided with a curved finger secured to the upper part of the cradle and a corresponding light provided in the lower part of the cradle, designed so that the curved finger is inserted into the corresponding light 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 arranged in the distal part of the cradle relative to the articulation.
[0018] The cradle can include two joints.
[0019] The invention also relates to a method of assembling a motor vehicle as described above, comprising the following steps:
[0020] • a filter pad is installed on each finger,
[0021] • the compressor is installed in the lower part of the cradle so that each filter pad is placed in the corresponding partial opening,
[0022] • the upper part of the cradle is then arranged so that the partial openings correspond with the partial openings made in the lower part of the cradle,
[0023] • the two parts of the cradle are joined together by inserting at least two clamping elements into the slots provided in the cradle.
[0024] Another object of the invention is a method of assembling a motor vehicle comprising at least one articulation and as described above, comprising the following steps: • a filter pad is installed on each finger,
[0025] • the compressor is installed in the lower part of the cradle so that each filter pad is placed in the corresponding partial opening,
[0026] • the upper part of the cradle is then arranged so that at least one curved finger is arranged at the entrance of the corresponding light,
[0027] • the upper part of the cradle is lowered so that the partial openings are aligned with the partial openings made in the lower part of the cradle,
[0028] • the two parts of the cradle are joined by inserting at least one clamping element into the hole provided in the cradle.
[0029] Brief description of the drawings
[0030] Other aims, characteristics and advantages of the invention will appear on reading the following description, given solely by way of non-limiting example and made with reference to the appended drawings in which:
[0031] - figure [Fig 1] is a bird's eye view illustrating a compressor equipped with a filter cradle according to a first embodiment of the invention,
[0032] - figure [Fig 2] is an exploded view illustrating the compressor equipped with a filter cradle according to a first embodiment of the invention,
[0033] - figure [Fig 3] is a bird's eye view illustrating a compressor provided with a filter cradle according to a first embodiment of the invention in the open position, and
[0034] - figure [Fig 4] is a bird's eye view illustrating the compressor equipped with a filter cradle according to a second embodiment of the invention.
[0035] Detailed description
[0036] In the figure [Fig 1], an electric compressor 1 for a motor vehicle is illustrated. The electric compressor 1 comprises a casing 2 provided 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 elastically deformable material such as rubber or elastomer provided with an axial perforation made so as to allow the insertion of a finger 2a, 2b, 2c.
[0037] The electric compressor 1 is arranged in a cradle 4a, 4b in two parts. The cradle 4a, 4b comprises and an upper part 4a, connected in rotation to a lower part 4b by two joints 5, the lower part 4b being integral with the structure of the motor vehicle.
[0038] The cradle 4a, 4b is provided with an opening opposite each finger 2a, 2b, 2c, designed so as to each accommodate 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 production and installation.
[0039] Each joint 5 is designed so as to allow the rotation of the upper part 4a of the cradle towards the lower part 4b of the cradle while allowing its separation. Each joint 5 cooperates with a clamping element 7 arranged in the distal part of the cradle 4a, 4b relative to the joints 5 in order to secure the upper part 4a with the lower part 4b. It will be noted that the clamping element 7 is offset relative to the plane of symmetry of the distal part so as not to interfere with the filter pad 3b and the corresponding opening. The offset may be an offset to the left or to the right relative to the plane of symmetry.
[0040] The clamping element 7 is in particular 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. The upper part 4a may also be provided with a thread. Alternatively, the clamping element 7 is a bolt / nut or threaded rod / nut assembly inserted into two slots provided in the lower part and the upper part of the cradle. Here too, the slot provided in the upper part 4a and / or the slot provided in the lower part 4b may be provided with a thread.
[0041] It will also be understood that other clamping elements may be arranged, in particular in the lateral parts of the cradle, between the articulation 5 and the distal part.
[0042] 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 references and are not described again for the sake of brevity.
[0043] Compared to figure [Fig 1], figure [Fig 2] illustrates more precisely partial openings 6aa,6ab,6ac provided in the upper part 4a, partial openings 6ba,6bb,6bc provided in the lower part 4b of the cradle, as well as the parts of the articulation 5.
[0044] Each opening intended to receive a filter pad 3 a, 3 b, 3 c is formed by matching a partial opening 6 aa, 6 ab, 6 ac provided in the upper part 4 a of the cradle with a partial opening 6 ba, 6 bb, 6 bc provided in the lower part 4 b of the cradle. In different embodiments, the openings are made so as to extend essentially in the lower part 4 b of the cradle, in the upper part 4 a of the cradle, or in both parts 4 a, 4 b of the cradle.
[0045] The joint 5 is also visible and comprises a curved finger 5a secured to the upper part 4a of the cradle and a corresponding slot 5b provided 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.
[0046] Reference 8b denotes the threaded hole or slot in the lower part 4b of the cradle, into which the clamping element 7 is inserted.
[0047] Figure [Fig 3 ] illustrates the open cradle 4a, 4b. The elements common to the elements illustrated by figure [Fig 1 ] and figure [Fig 2] bear the same references.
[0048] The cradle 4a, 4b being open, the reference 8a designating the threaded hole or the light made in the upper part 4a of the cradle and in which the clamping element 7 is inserted, is shown.
[0049] The assembly of the compressor 1 in the cradle 4a, 4b then 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 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 then lowered onto the lower part 4b of the cradle until contact is made and so that the partial openings 6aa, 6ab, 6ac formed in the upper part 4a of the cradle are brought into correspondence with the partial openings 6ba, 6bb, 6bc formed in the lower part 4b of the cradle. The filter pads 3 a, 3 b, 3 c cannot then move.The two parts 4a, 4b of the cradle are then secured by inserting and screwing at least one clamping element 7.
[0050] 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 centering of the filter pad 3a, 3b, 3c in the corresponding opening of the cradle 4a, 4b, in particular 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]
[0051] 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.
[0052] The assembly of 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 arranged in the corresponding partial opening 6ba, 6bb, 6bc. The upper part 4a of the cradle is then arranged so that the partial openings 6aa, 6ab, 6ac 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 secured by inserting and screwing the at least two clamping elements 7a, 7b.
[0053] It will also be noted that in a particular embodiment of this second embodiment, a two-part leg is produced 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 provided with a thread. This has the effect of increasing the clamping force of each clamping element and increasing its resistance 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 perforation 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 the intermediate of at least one clamping element (7) so as to hold the filter pads (3 a, 3b, 3 c) in place, the filter pads (3 a, 3b,3 c) 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 (3 a, 3 b, 3 c) and the corresponding openings are cylindrical in shape.
3. Motor vehicle according to claim 1 or 2, in which the filter pads (3 a, 3 b, 3 c) 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. Motor vehicle according to claim 1, in which the light provided in the upper part (4a) is provided with a thread.
6. Motor vehicle according to any one of claims 1 to 5, in which the openings of the cradle (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) formed in the lower part (4b) of the cradle, designed so that the curved finger (5a) is inserted into the light (5b) corresponding in order to guide the rotation of the upper part (4a) of the cradle until it comes into contact with 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 articulation (5).
8. Motor vehicle according to claim 7, in which the cradle (4a, 4b) comprises two articulations.
9. Method of assembling a motor vehicle according to any one of claims 1 to 6, comprising the following steps: • we install a filter pad (3 a, 3b, 3 c) 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 placed in 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 provided in the cradle (4a, 4b).
10. Method of assembling a motor vehicle according to any one of claims 7 or 8, comprising the following steps: • we install a filter pad (3 a, 3b, 3 c) 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 aligned 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 at least one clamping element into the slot provided in the cradle (4a, 4b).